A differential pressure stabilization apparatus and control method for a gas-phase polyethylene solid catalyst feeder. The differential pressure stabilization apparatus comprises: a differential pressure measurement unit, a high-pressure side of which is connected to a solid catalyst feeding storage tank (14), a low-pressure side of which is connected to a reactor, and which is configured to measure a differential pressure between the solid catalyst feeding storage tank (14) and the reactor; a regulation unit, which is configured to regulate the flow rate of nitrogen that is input into or output from the solid catalyst feeding storage tank (14); a control unit, which is configured to receive a differential pressure signal collected by the differential pressure measurement unit, and control, when the differential pressure between the solid catalyst feeding storage tank (14) and the reactor deviates from a set value range, the regulation unit to regulate the flow rate of nitrogen; and a discharge treatment unit, which is connected to the solid catalyst feeding storage tank (14) by means of a nitrogen outlet channel, wherein a dust removal filter element (8) is provided on an outlet side of the discharge treatment unit, and is configured to purify nitrogen that contains catalyst particles and is discharged from the outlet side of the discharge treatment unit.
A force transmission structure for enhancing the operational stability of a high-pressure safety valve, and a safety valve, relating to the field of safety valve structures. The force transmission structure comprises a disc holder (3), a valve disc (4), a guide sleeve (6), and a steel ball (7), wherein the guide sleeve is provided with a limiting through hole; one end of the disc holder is mounted in the limiting through hole, the disc holder is slidably connected to the guide sleeve in the axial direction of the limiting through hole, and the other end of the disc holder is provided with a first mounting groove; the valve disc is mounted in the first mounting groove, and a second mounting groove is provided in the middle of the end face of the valve disc facing the bottom of the first mounting groove; and the steel ball is mounted between the disc holder and the valve disc, the steel ball being in contact with the bottom of the first mounting groove and the bottom of the second mounting groove. The force transmission structure ensures the setting stability of the safety valve under high-pressure operating conditions, achieving a setting pressure deviation of ≤3% and a setting pressure stability deviation within ±1%.
F16K 17/04 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side spring-loaded
3.
VALVE PLATE ASSEMBLY AND VALVE SUITABLE FOR HIGH TEMPERATURES
A valve plate assembly suitable for high temperatures, comprising a valve disc (1) and a valve disc ring (2), wherein the edge of one end face of the valve disc (1) along its axis is provided with a stepped slot, the valve disc ring (2) is located in the stepped slot, the valve disc ring (2) protrudes from a surface of the valve disc (1) in the axial direction of the valve disc (1), and the valve disc ring (2) is used for cooperating with a valve seat (34) in a valve; a plurality of first through holes (12) uniformly distributed along the circumferential direction of the stepped slot are provided at the position of the stepped slot of the valve disc (1); threaded holes are uniformly distributed on the back surface of the valve disc ring (2), and first bolts (6) penetrate through the first through holes and are connected to the threaded holes of the valve disc ring (2); a weld seam is formed by welding between an outer circumferential surface of the valve disc ring (2) and the valve disc (1) or between the surface of the valve disc ring (2) protruding from the valve disc (1) and the valve disc (1); and a stress relief groove (8) is provided on at least one side of the weld seam. The valve plate assembly can prevent the valve disc ring from falling off under high temperature or frequent opening and closing conditions, thus prolonging the service lifetime of the valve disc. Also disclosed is a valve comprising the valve plate assembly.
F16K 3/02 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor
F16K 3/30 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing Details
4.
SINGLE-CHIP MICROCOMPUTER-BASED CONTROL SYSTEM FOR DIESEL BURNER OF EXTERNAL COMBUSTION TYPE THERMOACOUSTIC GENERATOR
The present invention relates to a single-chip microcomputer-based control system for a diesel burner of an external combustion type thermoacoustic generator, comprising a transformer module, a single-chip microcomputer, an operational amplifier module and a relay module. According to the present invention, a linear switching strategy is designed under the control of the single-chip microcomputer, and the parameter switching between gears is gradual and linear, so that the stability of flame is ensured. According to the control system of the present invention, a flame detection device is designed; and when the flame is detected to be extinguished, a protection program is immediately started, an oil pump is closed, an air blower is started for air purging to blow out residual atomized fuel oil in the burner, thereby ensuring the safety of the next ignition, and preventing deflagration. The control system of the present invention does not need to independently and manually operate the start and stop of air and oil, thereby improving the automatic control level of the burner.
Disclosed are a valve core connection structure and a valve core assembly. The valve core connection structure is used to connect a valve rod and a valve head. A side of the valve core connection structure close to the valve rod presses a valve rod annular step of the valve rod along an axial direction, and a side of the valve core connection structure close to the valve head presses a specially-shaped concave-convex connection structure of the valve head along a lateral direction. The valve core connection structure provided by the present application is used in scenarios such as a medium containing solids, a flow-rate being high, high scrubbing conditions being present, and the valve rod being made of metal and the valve core being a fragile material. By means of the design of the structure, reliable connection between a metal material and a superhard material can be ensured, and the capability of the superhard material to withstand impact can be improved to a certain extent, thereby achieving an overall long service life of the valve core assembly.
F16K 1/32 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces Details
F16K 1/48 - Attaching valve members to valve-spindles
6.
LARGE SOLID HEAT CARRIER HEATING APPARATUS FOR USE IN PYROLYSIS PROCESS OF ORGANIC SOLID WASTE
A solid heat carrier heating apparatus and a flue gas generator. The solid heat carrier heating apparatus comprises a pyrolysis reactor (5), a fluidized bed combustion chamber (9), a gas-solid separator (8), a mechanical return feeder (3), and a flue gas generator (1); the pyrolysis reactor (5) is used for conveying a solid pyrolysis reactant to the fluidized bed combustion chamber (9) for reaction; the gas-solid separator (8) is used for carrying out gas-solid separation on a reaction product of the fluidized bed combustion chamber (9) to obtain a solid heat carrier, and the solid heat carrier is conveyed into the fluidized bed combustion chamber (9) by means of the mechanical return feeder (3) for reaction; the flue gas generator (1) is used for conveying flue gas to the fluidized bed combustion chamber (9) so as to heat a solid pyrolysis reaction product and the solid heat carrier. The present invention can be suitable for pyrolysis of organic solid wastes such as waste miscellaneous plastics, oil sludge, tires and sludge, so that a large solid heat carrier furnace achieves high-efficiency pyrolysis carbon combustion, and stable bed layer temperature and bed layer pressure, and has a circulating solid particle flow adjustment function.
Disclosed is a pressure relief device for realizing online backup of a bursting disk. The pressure relief device is applied to a flow drainage position on a circulation path, so as to make the pressure relief device drain a flow of the circulation path, wherein two valve bodies (101) opposite each other are provided at the flow drainage position. The pressure relief device comprises a first sliding plate assembly (2) and a second sliding plate assembly (3), wherein the first sliding plate assembly (2) is provided with a first bursting disk (202), and the second sliding plate assembly (3) is provided with a second bursting disk (302), and when the second sliding plate assembly (3) is located between the two valve bodies (101), the second bursting disk (302) is located in the circulation path, and the first sliding plate assembly (2) is located outside the two valve bodies (101); and the first sliding plate assembly and the second sliding plate assembly are detachably connected together after the second bursting disk is burst, the second sliding plate assembly can move to be outside the two valve bodies, and the first sliding plate assembly can move to be between the two valve bodies, such that the first bursting disk can be switched to be in the circulation path, so as to be quickly and conveniently replaced. Further disclosed is a pressure system using the pressure relief device.
F16K 17/16 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side with fracturing member with fracturing diaphragm
Disclosed in the present application is a slide valve for conveying a dense particle flow. The slide valve comprises: a bonnet and a valve body, which are mechanically connected to each other, wherein the valve body is provided with an inlet flow channel and an outlet flow channel, a valve seat is detachably arranged at the position of the inlet flow channel, a valve core assembly moving in a direction perpendicular to the axis direction of the inlet flow channel is arranged between the inlet flow channel and the outlet flow channel, the valve core assembly is connected to a valve stem, and the valve stem is slidably connected to the bonnet; a first purging structure, which is in communication with the outside of the valve body and an inner wall of the valve seat, and is used for blowing out air from the inner wall of the valve seat to purge solid particles accumulated at the inlet flow channel; and a second purging structure, which is located between the valve stem and the bonnet, is in communication with the outside of the bonnet and the circumference of the valve stem, and is used for blowing out air towards the circumference of the valve stem to purge solid particles outside the valve stem. The present application solves a valve fault caused by material bridging in the valve seat and the faults of the valve stem, such as sluggishness and jams, caused by particle accumulation. In addition, the throat diameter of the valve body is variable, the flow characteristics of the valve can be adjusted, and a valve core matching assembly can be disassembled and replaced.
F16K 3/02 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor
F16K 3/314 - Forms or constructions of slidesAttachment of the slide to the spindle
The present invention relates to the field of protective valves. Disclosed is a breather valve core. A valve rod of the valve core is fixed at the central position of a valve disc, a plurality of connecting holes are provided in the valve disc, the outer edge of the valve disc is provided with a backflushing structure, and the valve disc is provided with a cushioning groove; a diaphragm having a slightly small diameter is tightly attached to the lower surface of the valve disc, the center of the diaphragm is fixed to the valve rod, and the diaphragm is provided with a plurality of connecting holes aligned with the connecting holes of the valve disc; a diaphragm pressing plate having a slightly small diameter is tightly attached to the lower side of the diaphragm, the center of the diaphragm pressing plate is fixed to the valve rod, and the diaphragm pressing plate is provided with a plurality of connecting holes aligned with the connecting holes of the diaphragm; and the valve disc, the diaphragm, and the diaphragm pressing plate are fixed by means of the connecting holes. The breather valve core of the present invention not only meets the sealing requirement in a low-set-point high-pressure-bearing working condition, but also ensures the discharge capacity of the breather valve and the service life of the diaphragm while maintaining the lowest set point of the valve at 0.1 to 0.3 or -0.1 to -0.3 kPag.
F16K 7/12 - Diaphragm cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage with flat, dished, or bowl-shaped diaphragm
F16K 17/19 - Equalising valves predominantly for tanks
F16K 51/00 - Other details not peculiar to particular types of valves or cut-off apparatus
patents