CN112145714A - Stop valve clack with pressure relief mechanism and pressure relief method of device - Google Patents

Stop valve clack with pressure relief mechanism and pressure relief method of device Download PDF

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Publication number
CN112145714A
CN112145714A CN202010940721.6A CN202010940721A CN112145714A CN 112145714 A CN112145714 A CN 112145714A CN 202010940721 A CN202010940721 A CN 202010940721A CN 112145714 A CN112145714 A CN 112145714A
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CN
China
Prior art keywords
discharge pipe
air bag
channel
opening
fluid
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Withdrawn
Application number
CN202010940721.6A
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Chinese (zh)
Inventor
刘立东
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Anhui Weisong Productivity Promotion Co Ltd
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Anhui Weisong Productivity Promotion Co Ltd
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Priority to CN202010940721.6A priority Critical patent/CN112145714A/en
Publication of CN112145714A publication Critical patent/CN112145714A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe 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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)

Abstract

The invention discloses a stop valve clack with a pressure relief mechanism and a pressure relief method of the stop valve clack, wherein the stop device comprises an air bag capable of being pressurized and expanded, the front of the air bag faces to an opening of a discharge pipe, the upper end of the air bag is communicated with a first spacious space through an air inlet hopper which is vertically upward, when the air with spacious space is pressurized, the air enters the air bag to be expanded so as to block the opening of the discharge pipe, the air bag blocks the discharge pipe in an air filling mode, the sealing performance is strong, the air bag can be inflated at any time so as to increase the sealing performance of the air bag, the sealing performance can be kept long and better, the air bag can be further blocked at the opening of the discharge pipe through extrusion of fluid received in a flow relief channel, and the pressure relief device comprises a channel for guiding the flow.

Description

Stop valve clack with pressure relief mechanism and pressure relief method of device
Technical Field
The invention relates to the technical field of stop valves, in particular to a stop valve clack with a pressure relief mechanism and a pressure relief method of the device.
Background
The shut-off valve is also called a shut-off valve, and belongs to a forced sealing type valve, so when the valve is closed, pressure must be applied to the valve clack to force the sealing surface not to leak. When the medium enters the valve from the lower part of the valve clack, the resistance to be overcome by the operating force is the friction force between the valve rod and the packing and the thrust generated by the pressure of the medium, the force for closing the valve is larger than the force for opening the valve, so the diameter of the valve rod is larger, otherwise the failure of the valve rod buckling can occur.
In the prior art, the valve flap in the stop valve is sealed or bears large water pressure impact force in a pipeline when being opened, so that the valve flap is easy to lose under long-time high pressure, and the service life is shortened; to this end, we provide a stop valve flap with a pressure relief mechanism and a pressure relief method of the device to solve the above problems.
Disclosure of Invention
The invention provides a stop valve clack with a pressure relief mechanism and a pressure relief method of the stop valve clack, aiming at the problems in the prior art, the stop device comprises an airbag capable of being pressurized and expanded, the front surface of the airbag faces to the opening of a discharge pipe, the upper end of the airbag is communicated with a first spaciousness space through an air inlet hopper which is vertically upward, when the first spaciousness space is pressurized, air enters the airbag to be expanded so as to block the opening of the discharge pipe, the airbag blocks the discharge pipe in an air filling mode, the sealing performance is strong, the airbag can be inflated at any time so as to increase the sealing performance of the airbag, the sealing performance can be kept good for a long time, the airbag can be further blocked at the opening of the discharge pipe through the extrusion of fluid received in a discharge passage, and the practicability is strong.
In order to achieve the above object, the present invention provides a stop valve flap with a pressure relief mechanism, comprising: the row of casing both sides advances pipe, discharge pipe and the inside valve clack of casing, still includes:
the valve clack is arranged in the center of the interior of the shell; and the valve flap comprises: a cut-off device and a pressure relief device;
the upper end and the lower end of the cut-off device are provided with spaciousness from the top and the bottom surfaces of the shell, the spaciousness of the upper end is a first spaciousness, and the spaciousness of the lower end is a second spaciousness;
the stopping device comprises an air bag which can be pressed and expanded, the front surface of the air bag faces to the opening of the discharge pipe, the upper end of the air bag is communicated with a first spacious space through an air inlet hopper which is vertically upward, and when the gas in the first spacious space is pressed, the gas enters the air bag to be expanded so as to block the opening of the discharge pipe;
the pressure relief device comprises a channel for guiding liquid to flow so as to realize pressure relief, the opening of the discharge pipe is communicated with one end of the channel so as to realize the input of the liquid, the other end of the channel is also communicated with the opening of the discharge pipe so as to realize the output of the liquid, and the liquid is pushed against the air bag and continuously applies pressure to the air bag when being input.
As a further optimization of the above scheme, one end of the channel is provided with a bell mouth for the fluid flowing out of the discharge pipe to enter, the other end of the channel is provided with a one-way opening plate which can receive the impact force of the fluid in the channel and open to discharge the fluid in the channel, the one-way opening plate is blocked at the end part of the channel, the lower surface of the valve clack is provided with a telescopic groove, and the bottom of the telescopic groove is fixedly provided with a spring for pulling and holding the one-way opening plate.
As a further optimization of the above scheme, an elastic spring which is transversely arranged and tensions the air bag to be in a contracted state is arranged in the air bag, a blocking plate which can be attached to and blocked at the opening of the discharge pipe is fixedly arranged on one side of the air bag, and an air hole through which fluid entering the channel passes to extrude the air bag to be blocked at the opening of the discharge pipe is arranged on the inner wall of the channel.
As a further optimization of the above scheme, a first arc-shaped guide plate for guiding the fluid at the discharge pipe into the bell mouth is fixedly arranged on the inner wall of the lower end of the shell, and a second arc-shaped guide plate for receiving the fluid guided to flow through the first arc-shaped guide plate is arranged at the opening of the bell mouth.
As a further optimization of the above scheme, an inflation unit for inflating the airbag is arranged above the housing, the inflation unit comprises a limiting sealing ring and an inflation housing which are sequentially arranged above the housing, a liftable push plate is arranged inside the inflation housing, a pressurizing cavity capable of being inflated and pressurized is arranged above the inflation housing by the push plate, an air storage cavity capable of being compressed or released is formed between the push plate and the inflation housing and between the.
As a further optimization of the above scheme, a sealing ring blocked inside the inflatable shell is fixedly arranged at the outer ring of the push plate, a guide rod for supporting the push plate to lift in the inflatable shell along the axis direction of the inflatable shell is fixedly welded on the upper surface of the push plate, the upper end of the guide rod movably penetrates through the upper surface of the inflatable shell, the guide rod and the inflatable shell are kept sealed, and an operating handle is integrally arranged at the upper end of the guide rod.
As the further optimization of above-mentioned scheme, the upper surface of aerifing the casing is equipped with the trachea that can aerify or deflate to the pressurization chamber, and the shutoff of tracheal opening part has the rubber buffer, tracheal one side intercommunication is equipped with the pressure unit that can monitor pressurization intracavity pressure.
As a further optimization of the scheme, the channel is arranged in the valve clack in an inverted U-shaped structure, and the side surface of the channel, which is positioned at one end of the bell mouth, inclines towards the air bag.
The invention also discloses a pressure reduction method, which comprises the stop valve clack with the pressure relief mechanism, and further comprises the following steps:
s1: stopping decompression, when the air pipe inflates the pressurizing cavity to enable the push plate to descend to push the air above the valve clack to enter the air bag from the air inlet hopper, the air bag expands and deforms to block the opening of the discharge pipe to perform stopping operation, when stopping, the fluid entering the shell from the discharge pipe enters the channel from the bell mouth through the guide of the first arc-shaped guide plate and the second arc-shaped guide plate, the fluid entering the channel flows back into the discharge pipe through the channel to form decompression operation, the impact of the fluid flowing into the shell from the discharge pipe on the valve clack is reduced, and the process of decompressing the valve clack after the shell is stopped is formed;
s2: when the fluid entering the shell enters the channel for pressure reduction, the flowing fluid passes through the air holes on the inner wall of the channel and extrudes the air bag to deform, so that the air bag is pressed towards the opening of the discharge pipe, the aim of enhancing the sealing property between the blocking plate on the surface of the air bag and the discharge pipe is fulfilled, and the process of further stopping after pressure reduction is fulfilled;
s3: when the air in the air bag is correspondingly pumped out, the air bag is shrunk and deformed to be separated from the opening of the discharge pipe and form a through hole for the fluid in the discharge pipe to enter the discharge pipe in a single direction, and when part of the fluid in the shell impacts the surface of the valve flap in the communication process, the fluid circularly circulated in the inlet channel enters the inlet channel of the fluid in the discharge pipe and is discharged to the inlet position of the fluid in the shell, so that the impact force of the fluid discharged to the shell from the discharge pipe is counteracted, and the effect of reducing the pressure applied to the valve flap when the shell is communicated is achieved.
As a further optimization of the scheme, the diameter of the push plate is larger than the inner diameter of the limiting sealing ring, a fixing plate is fixedly arranged at the outer ring of the upper end of the shell, and the limiting sealing ring and the fixing plate are jointly fixed at the opening at the bottom of the inflatable shell through screws.
The invention relates to a stop valve clack with a pressure relief mechanism and a pressure relief method of the device, which have the following beneficial effects:
1. the invention relates to a stop valve clack with a pressure relief mechanism and a pressure relief method of the stop valve clack, wherein the stop device comprises an airbag capable of being pressurized and expanded, the front surface of the airbag faces to the opening of a discharge pipe, the upper end of the airbag is communicated with a first spacious space through a vertically upward air inlet hopper, when the gas spacious space is pressurized, the gas enters the airbag to be expanded so as to block the opening of the discharge pipe, the discharge pipe is blocked by the airbag in a gas filling mode, the sealing performance is strong, the airbag can be inflated at any time to increase the sealing performance of the airbag, the sealing performance can be kept long and better, and the airbag can be further blocked at the opening of the discharge pipe through extrusion of fluid received in a discharge passage, so that the stop valve clack is strong in;
2. the invention relates to a stop valve clack with a pressure relief mechanism and a pressure relief method of the stop valve clack.
There have been disclosed in detail certain embodiments of the invention with reference to the following description and drawings, and it is to be understood that the embodiments of the invention are not limited thereby, but are intended to cover within the spirit and scope of the appended claims, many changes, modifications, and equivalents.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic bottom view of the present invention;
FIG. 3 is a schematic view of the internal structure of the present invention;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is a schematic view of the pressurized chamber of the present invention as it is compressed;
FIG. 6 is a schematic view of the construction of the valve flap of the present invention;
FIG. 7 is a schematic view of the bladder of the present invention shown in a compressed configuration;
fig. 8 is an enlarged view of the structure at a in fig. 7 according to the present invention.
In the figure: the device comprises a shell 1, an inflatable shell 2, a discharge pipe 3, a discharge pipe 4, a limiting sealing ring 5, an air pipe 6, a pressure unit 7, a guide rod 8, an operating handle 9, a fixing plate 10, a pressurizing cavity 11, a push plate 12, a sealing ring 13, a valve clack 14, a first arc-shaped guide plate 15, an air inlet hopper 16, a channel 17, a bell mouth 18, a one-way opening plate 19, a blocking plate 20, an air bag 21, an air hole 22, an elastic spring 23, a spring 24, a telescopic groove 25, a through hole 26 and a second arc-shaped guide plate 27.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
It should be noted that when an element is referred to as being "disposed on," or provided with "another element, it can be directly on the other element or intervening elements may also be present, when an element is referred to as being" connected, "or coupled to another element, it can be directly on the other element or intervening elements may be present, and" fixedly coupled "means that the element is fixedly coupled in many ways, which are not intended to be within the scope of the present disclosure, the terms" vertical, "" horizontal, "" left, "" right, "and the like are used herein for illustrative purposes only and are not intended to be a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification are for the purpose of describing particular embodiments only and are not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items;
referring to the attached drawings 1-8 in the specification, the invention provides a technical scheme: a stop valve flap with a pressure relief mechanism comprising: the discharge pipe 4, discharge pipe 3 and the valve clack 14 of casing 1 inside of casing 1 both sides still include:
the valve flap 14 is arranged in the center of the interior of the housing 1; and the valve flap 14 comprises: a cut-off device and a pressure relief device;
the upper end and the lower end of the cut-off device are provided with spaciousness from the top and the bottom of the shell 1, the spaciousness of the upper end is a first spaciousness, and the spaciousness of the lower end is a second spaciousness;
the stopping device comprises a pressure-expandable air bag 21, the front surface of the air bag 21 faces the opening of the discharge pipe 3, the upper end of the air bag 21 is communicated with a first spacious space through an air inlet bucket 16 which is vertically upward, and gas in the spacious space enters the air bag 21 to expand to block the opening of the discharge pipe 3 when being pressurized;
the pressure relief device comprises a channel 17 for guiding liquid to flow so as to realize pressure relief, the opening of the discharge pipe 4 is communicated with one end of the channel 17 so as to realize liquid input, the other end of the channel 17 is also communicated with the opening of the discharge pipe 3 so as to realize liquid output, and the liquid input abuts against the air bag 21 and continuously applies pressure to the air bag 21.
In this embodiment, a bell 18 for the fluid flowing out of the discharge pipe 4 to enter is disposed at one end of the channel 17, a one-way opening plate 19 capable of receiving the impact force of the fluid in the channel 17 to open the channel 17 for discharging the fluid is disposed at the other end of the channel 17, the one-way opening plate 19 is sealed at the end of the channel 17, a telescopic slot 25 is disposed on the lower surface of the valve flap 14, and a spring 24 for pulling and holding the one-way opening plate 19 is fixedly disposed at the bottom of the telescopic slot 25.
The diameter of the one-way opening plate 19 is larger than the opening diameter of the channel 17, the one-way opening plate 19 moves outwards after receiving the impact of the fluid flowing in the channel 17, so that the fluid in the channel 17 reversely flows into the bottom of the valve clack 14, and when the channel 17 at the position of the one-way opening plate 19 is about to receive the fluid in the shell 1, the fluid can firstly impact the surface of the one-way opening plate 19, so that the one-way opening plate 19 seals the opening of the channel 17 at the position, the fluid is ensured not to enter from the opening of the channel 17 at the position, and the stable pressure relief of the fluid in the one-way flowing in the channel 17 is ensured.
The spring 24 plays a role in pulling and holding the one-way opening plate 19, so that the one-way opening plate 19 cannot fall off, and when no fluid exists in the channel 17, the pulling force of the spring 24 can pull and hold the one-way opening plate 19 and seal the opening of the channel 17.
It should be noted that, the inside of the airbag 21 is provided with an elastic spring 23 which is transversely arranged and tightens the airbag 21 to a contracted state, one side of the airbag 21 is fixedly provided with a blocking plate 20 which can be attached to and blocked at the opening of the discharge pipe 3, and the inner wall of the channel 17 is provided with an air hole 22 through which the fluid entering the channel 17 passes to press and block the airbag 21 at the opening of the discharge pipe 3.
Further, a first arc-shaped guide plate 15 for guiding the fluid at the position of the discharge pipe 4 into the bell mouth 18 is fixedly arranged on the inner wall of the lower end of the shell 1, and a second arc-shaped guide plate 27 for receiving the fluid guided to flow through the first arc-shaped guide plate 15 is arranged at the opening of the bell mouth 18.
The fluid entering the housing 1 from the exhaust pipe 4 is guided by the first arc-shaped guide plate 15 and the second arc-shaped guide plate 27 to be mostly led into the bell mouth 18, and enters the channel 17 from the larger bell mouth 18 for circular pressure relief.
Specifically, the top of casing 1 is equipped with the inflation unit to gasbag 21 inflation, and the inflation unit is including setting gradually spacing sealing ring 5 in casing 1 top, aerify casing 2, and the inside of aerifing casing 2 is equipped with liftable push pedal 12, and push pedal 12 will be aerifyd the top of casing 2 and be equipped with inflatable pressurization chamber 11, forms the gas storage cavity that can be compressed or release between push pedal 12 and aerify casing 2, casing 1, and the surface of valve clack 14 is equipped with the air inlet hopper 16 of discharging the gas in the gas storage cavity into gasbag 21.
The air bag 21 is inflated or deflated in the inflation shell 2, so that the opening of the discharge pipe 3 is blocked or opened, and the use is convenient.
When the push plate 12 moves downwards, the air storage cavity is compressed, air in the air storage cavity enters the air bag 21 from the air inlet hopper 16, the air bag 21 is expanded, and the blocking plate 20 on the surface of the air bag 21 is attached to and blocked at the opening of the discharge pipe 3, so that the sealing of the device is realized.
When the push plate 12 moves upwards, the air storage cavity is released, the space in the air storage cavity is released to suck the air in the air bag 21, and the air bag 21 is controlled to shrink so as to form a through hole 26 between the blocking plate 20 and the discharge pipe 3 for communicating the discharge pipe 3 with the discharge pipe 4.
Furthermore, a sealing ring 13 blocked inside the inflatable shell 2 is fixedly arranged at the outer ring of the push plate 12, a guide rod 8 for supporting the push plate 12 to lift in the inflatable shell 2 along the axis direction of the inflatable shell 2 is fixedly welded on the upper surface of the push plate 12, the upper end of the guide rod 8 movably penetrates through the upper surface of the inflatable shell 2, the guide rod 8 and the inflatable shell 2 are kept sealed, and an operating handle 9 is integrally arranged at the upper end of the guide rod 8.
The guide rod 8 mainly plays a role in guiding, so that the push plate 12 can stably and vertically lift in the inflatable shell 2, and the sealing ring 13 on the outer ring of the push plate 12 ensures that the push plate 12 can separate the inflatable shell 2 from top to bottom.
Specifically, the upper surface of the inflation shell 2 is provided with an air pipe 6 which can inflate or deflate into the pressurization cavity 11, the opening of the air pipe 6 is sealed by a rubber plug, and one side of the air pipe 6 is communicated with a pressure unit 7 which can monitor the pressure in the pressurization cavity 11.
The pressure unit 7 can use a gas pressure gauge or the like to observe the pressure of the gas filled in the pressurizing cavity 11, so as to realize that enough gas is filled for the push plate 12 to lift.
The channel 17 is arranged inside the flap 14 in an inverted U-shaped configuration, the side of the channel 17 at the end of the flare 18 being inclined towards the air-bag 21.
The invention also discloses a pressure reduction method, which comprises the stop valve clack with the pressure relief mechanism, and also comprises the following steps:
s1: stopping decompression, when the air pipe 6 inflates the pressurizing cavity 11 to make the push plate 12 descend to push the gas above the valve flap 14 to enter the air bag 21 from the air inlet hopper 16, the air bag 21 expands and deforms to be blocked at the opening of the discharge pipe 3 to perform a stopping operation, when the pressure is stopped, the fluid entering the shell 1 from the discharge pipe 4 enters the channel 17 from the bell mouth 18 through the guidance of the first arc-shaped guide plate 15 and the second arc-shaped guide plate 27, the fluid entering the channel 17 flows back into the discharge pipe 4 through the channel 17 to form a decompression operation, the impact of the fluid flowing into the shell 1 from the discharge pipe 4 to the valve flap 14 is reduced, and a process of decompressing the valve flap 14 after the shell 1 is stopped is formed;
s2: when the fluid entering the shell 1 enters the channel 17 for pressure reduction, the flowing fluid passes through the air holes 22 on the inner wall of the channel 17 and presses the air bag 21 to deform, so that the air bag 21 is pressed towards the opening of the discharge pipe 3, the purpose of enhancing the sealing property between the blocking plate 20 on the surface of the air bag 21 and the discharge pipe 3 is achieved, and the process of further stopping after pressure reduction is completed;
s3: when the gas in the air bag 21 is correspondingly extracted by extracting the gas in the pressurizing cavity 11 from the air pipe 6 to lift the push plate 12, the air bag 21 shrinks and deforms to separate from the opening of the discharge pipe 3 and form a through hole 26 for the fluid in the discharge pipe 4 to enter the discharge pipe 3 in one way, and when part of the fluid in the shell 1 impacts the surface of the valve flap 14 in the communication process, the fluid enters the channel 17 through the bell mouth 18 on the surface of the valve flap 14, and the fluid circularly circulated in the channel 17 flows into the discharge pipe 4 again and is discharged to the fluid inlet position of the shell 1, so that the impact force of the fluid discharged to the shell 1 from the discharge pipe 4 is counteracted, and the effect of reducing the pressure applied to the valve flap 14 when the shell 1 is communicated is achieved.
In this embodiment, the diameter of the push plate 12 is greater than the inner diameter of the limiting sealing ring 5, the fixing plate 10 is fixedly arranged at the outer ring of the upper end of the casing 1, and the limiting sealing ring 5 and the fixing plate 10 are jointly fixed at the bottom opening of the inflatable casing 2 through screws.
The limiting sealing ring 5 avoids the phenomenon that the push plate 12 falls off downwards, and the inflatable shell 2 is convenient to disassemble, assemble and maintain.
It should be understood that the present invention is not limited to the particular embodiments described herein, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A stop valve flap with a pressure relief mechanism comprising: the row of casing both sides advances pipe, discharge pipe and the inside valve clack of casing, its characterized in that still includes:
the valve clack is arranged in the center of the interior of the shell; and the valve flap comprises: a cut-off device and a pressure relief device;
the upper end and the lower end of the cut-off device are provided with spaciousness from the top and the bottom surfaces of the shell, the spaciousness of the upper end is a first spaciousness, and the spaciousness of the lower end is a second spaciousness;
the stopping device comprises an air bag which can be pressed and expanded, the front surface of the air bag faces to the opening of the discharge pipe, the upper end of the air bag is communicated with a first spacious space through an air inlet hopper which is vertically upward, and when the gas in the first spacious space is pressed, the gas enters the air bag to be expanded so as to block the opening of the discharge pipe;
the pressure relief device comprises a channel for guiding liquid to flow so as to realize pressure relief, the opening of the discharge pipe is communicated with one end of the channel so as to realize the input of the liquid, the other end of the channel is also communicated with the opening of the discharge pipe so as to realize the output of the liquid, and the liquid is pushed against the air bag and continuously applies pressure to the air bag when being input.
2. The check valve flap with a pressure relief mechanism of claim 1, wherein: one end of the channel is provided with a horn mouth for the fluid flowing out of the discharge pipe to enter, the other end of the channel is provided with a one-way opening plate which can receive the impact force of the fluid in the channel and open the fluid in the channel to discharge, the one-way opening plate is blocked at the end part of the channel, the lower surface of the valve clack is provided with a telescopic groove, and the bottom of the telescopic groove is fixedly provided with a spring for pulling and holding the one-way opening plate.
3. The check valve flap with a pressure relief mechanism of claim 1, wherein: the inner part of the air bag is provided with an elastic spring which is transversely arranged and tensions the air bag to be in a shrinking state, one side of the air bag is fixedly provided with a plugging plate which can be attached to and plugged at the opening of the discharge pipe, and the inner wall of the channel is provided with an air hole through which fluid entering the channel passes to extrude the air bag to plug the opening of the discharge pipe.
4. The check valve flap with a pressure relief mechanism of claim 2, wherein: the lower extreme inner wall of casing is last to be fixed to be equipped with and to arrange into the first arc deflector of pipe department fluid direction entering horn mouth, the opening part of horn mouth is equipped with the second arc deflector of receiving through the fluid of first arc deflector direction flow.
5. The check valve flap with a pressure relief mechanism of claim 1, wherein: the top of casing is equipped with the inflatable unit to the gasbag inflation, inflatable unit is including setting gradually spacing sealing ring in the casing top, aerify the casing, the inside of aerifing the casing is equipped with the push pedal of liftable, the top that the casing will be aerifyd to the push pedal is equipped with inflatable pressurized pressurization chamber, form the gas storage cavity that can be compressed or release between push pedal and the casing of aerifing, the surface of valve clack is equipped with the air inlet fill of gas row in the gas storage cavity into the gasbag.
6. The check valve flap with a pressure relief mechanism of claim 5, wherein: the sealing ring of shutoff in the inflatable housing inside is fixed to the outer lane department of push pedal, the last fixed surface welding of push pedal has the guide bar that supports the push pedal and go up and down along inflatable housing axis direction in inflatable housing, the upper end activity of guide bar passes inflatable housing's upper surface, keeps sealed between guide bar and the inflatable housing, the upper end an organic whole of guide bar is equipped with operating handle.
7. The check valve flap with a pressure relief mechanism of claim 5, wherein: the upper surface of the inflatable shell is provided with an air pipe which can inflate or deflate into the pressurizing cavity, the rubber plug is arranged at the opening of the air pipe in a blocking mode, and one side of the air pipe is communicated with a pressure unit which can monitor the pressure in the pressurizing cavity.
8. The check valve flap with a pressure relief mechanism of claim 1, wherein: the channel is arranged in the valve clack in an inverted U-shaped structure, and the side face of the channel, which is positioned at one end of the bell mouth, inclines towards the air bag.
9. A method of reducing pressure, comprising: comprising the shut-off valve flap with pressure relief mechanism of any of claims 1-8, further comprising the steps of:
s1: stopping decompression, when the air pipe inflates the pressurizing cavity to enable the push plate to descend to push the air above the valve clack to enter the air bag from the air inlet hopper, the air bag expands and deforms to block the opening of the discharge pipe to perform stopping operation, when stopping, the fluid entering the shell from the discharge pipe enters the channel from the bell mouth through the guide of the first arc-shaped guide plate and the second arc-shaped guide plate, the fluid entering the channel flows back into the discharge pipe through the channel to form decompression operation, the impact of the fluid flowing into the shell from the discharge pipe on the valve clack is reduced, and the process of decompressing the valve clack after the shell is stopped is formed;
s2: when the fluid entering the shell enters the channel for pressure reduction, the flowing fluid passes through the air holes on the inner wall of the channel and extrudes the air bag to deform, so that the air bag is pressed towards the opening of the discharge pipe, the aim of enhancing the sealing property between the blocking plate on the surface of the air bag and the discharge pipe is fulfilled, and the process of further stopping after pressure reduction is fulfilled;
s3: when the air in the air bag is correspondingly pumped out, the air bag is shrunk and deformed to be separated from the opening of the discharge pipe and form a through hole for the fluid in the discharge pipe to enter the discharge pipe in a single direction, and when part of the fluid in the shell impacts the surface of the valve flap in the communication process, the fluid circularly circulated in the inlet channel enters the inlet channel of the fluid in the discharge pipe and is discharged to the inlet position of the fluid in the shell, so that the impact force of the fluid discharged to the shell from the discharge pipe is counteracted, and the effect of reducing the pressure applied to the valve flap when the shell is communicated is achieved.
10. A method of reducing pressure according to claim 9, wherein: the diameter of push pedal is greater than the internal diameter of spacing sealing ring, the fixed plate that is equipped with of upper end outer lane department of casing, spacing sealing ring, fixed plate pass through the fix with screw jointly and aerify the bottom opening part of casing.
CN202010940721.6A 2020-09-09 2020-09-09 Stop valve clack with pressure relief mechanism and pressure relief method of device Withdrawn CN112145714A (en)

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CN202010940721.6A CN112145714A (en) 2020-09-09 2020-09-09 Stop valve clack with pressure relief mechanism and pressure relief method of device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115990812A (en) * 2023-03-22 2023-04-21 淄博朗斯光电有限公司 Optical lens grinding equipment and grinding method
CN117123051A (en) * 2023-09-01 2023-11-28 南京东南工业装备股份有限公司 SCR reactor with soot blowing nozzle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115990812A (en) * 2023-03-22 2023-04-21 淄博朗斯光电有限公司 Optical lens grinding equipment and grinding method
CN115990812B (en) * 2023-03-22 2023-06-13 淄博朗斯光电有限公司 Optical lens grinding equipment and grinding method
CN117123051A (en) * 2023-09-01 2023-11-28 南京东南工业装备股份有限公司 SCR reactor with soot blowing nozzle
CN117123051B (en) * 2023-09-01 2024-08-27 南京东南工业装备股份有限公司 SCR reactor with soot blowing nozzle

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