CN114776832A - Diaphragm valve with balance effect and manufacturing method thereof - Google Patents
Diaphragm valve with balance effect and manufacturing method thereof Download PDFInfo
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- CN114776832A CN114776832A CN202210528231.4A CN202210528231A CN114776832A CN 114776832 A CN114776832 A CN 114776832A CN 202210528231 A CN202210528231 A CN 202210528231A CN 114776832 A CN114776832 A CN 114776832A
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- 230000000694 effects Effects 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000005192 partition Methods 0.000 claims abstract description 77
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims description 44
- 238000003825 pressing Methods 0.000 claims description 25
- 230000003139 buffering effect Effects 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 125000003003 spiro group Chemical group 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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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
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
- F16K7/126—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm the seat being formed on a rib perpendicular to the fluid line
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0236—Diaphragm cut-off apparatus
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a diaphragm valve with a balance effect and a manufacturing method thereof, wherein the diaphragm valve comprises a valve body, a driving assembly, a push rod, a valve rod and a diaphragm sheet; the valve body is of a three-way structure which is vertically arranged, and two ends of the valve body are horizontally arranged; a partition plate is vertically arranged at the horizontal part of the valve body and is divided into a first cavity and a second cavity left and right through the partition plate; the push rod is coaxially sleeved in the vertical part of the valve body, and the upper end of the push rod vertically extends upwards out of the valve body and is linked with the driving assembly; the lower end of the push rod is coaxially and spirally connected with a valve rod, a diaphragm is sleeved at the lower end of the valve rod, and the vertical part of the valve body is divided into a balance cavity and a third cavity in an up-and-down mode; the third cavity is respectively communicated with the first cavity and the second cavity to form a flow passage; the valve rod moves vertically up and down under the driving of the driving assembly to open or close the flow passage. According to the invention, the balance cavity ensures that the pressures of the fluid on the upper side and the lower side of the diaphragm are the same, and the phenomenon of damage caused by larger stress on one side of the diaphragm is avoided.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a diaphragm valve with a balance effect and a manufacturing method thereof.
Background
A diaphragm valve is a valve having a flexible diaphragm mounted therein, and is widely used in various fields. Compared with other types of valves, the diaphragm valve can separate a fluid passage from a driving part, so that the purity of the working fluid is ensured, and the corrosion of working parts and the pollution to the environment caused by fluid leakage are prevented.
However, the diaphragm strength of the existing common diaphragm valve is relatively weak, and if the pressure of the working fluid chamber is higher, the diaphragm is easily broken or deformed and failed due to overlarge stress, so that the existing common diaphragm valve is not suitable for controlling high-pressure fluid. Therefore, the above problems need to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a diaphragm valve with a balance effect and a manufacturing method thereof, wherein the balance cavity ensures that the pressures of fluid on the upper side and the lower side of a diaphragm are the same, so that the phenomenon of rupture or plastic deformation caused by large stress on one side of the diaphragm is avoided.
In order to solve the technical problem, the invention adopts the following technical scheme: the invention relates to a diaphragm valve with balance effect and a manufacturing method thereof, and the diaphragm valve has the innovation points that: comprises a valve body, a clapboard, a driving component, a push rod, a valve rod and a diaphragm; the valve body is of a vertically arranged three-way structure, and two ends of the valve body are horizontally arranged; a partition board matched with the inside of the horizontal part of the valve body is vertically arranged on the right side of the center of the horizontal part of the valve body, and the horizontal part of the valve body is divided into a first cavity and a second cavity by the partition board; the push rod is vertically sleeved in the vertical part of the valve body coaxially at intervals, and the upper end of the push rod vertically extends upwards out of the valve body and is linked with the driving assembly; the lower end of the push rod is coaxially and spirally sleeved with a valve rod, the lower end of the valve rod is coaxially sleeved with a diaphragm, the diaphragm is matched with the inner part of the vertical part of the valve body, and the vertical part of the valve body is divided into a balance cavity and a third cavity in an up-and-down mode; the third cavity is respectively communicated with the first cavity and the second cavity to form a flow passage; the lower end section of the valve rod is larger than the section of the communication part of the third cavity and the first cavity, the push rod drives the valve rod to vertically move up and down under the driving of the driving assembly, and the circulation channel is opened or closed.
Preferably, the driving assembly comprises a cylinder body, an upper cylinder cover, a lower cylinder cover, a piston, an adjusting rod, a first spring and a locking nut; the cylinder body is of a cylindrical structure coaxially arranged with the vertical part of the valve body, and the upper end and the lower end of the cylinder body are both open; the upper end and the lower end of the cylinder body are respectively provided with an upper cylinder cover and a lower cylinder cover in coaxial horizontal joint, and the upper cylinder cover, the cylinder body and the lower cylinder cover are fixedly connected into a hollow cylinder structure through the matching of bolts and nuts; the upper end of the vertical part of the valve body is also coaxially sleeved and fixedly provided with a first fixing plate, the upper surface of each first fixing plate is coplanar with the upper end surface of the vertical part corresponding to the valve body, and the upper end of the vertical part of the valve body is hermetically screwed and fixed with the lower surface of the lower cylinder cover of the driving assembly through the first fixing plate; a piston is coaxially arranged at a lower position in the middle of the interior of the cylinder body, is vertically and vertically connected with the cylinder body in a sliding manner through a sealing ring, and vertically divides the interior of the cylinder body into an upper cavity and a lower cavity; the upper end of the push rod sequentially extends vertically upwards, is vertically and vertically connected with the lower cylinder cover in a sliding manner through a sealing ring, and is fixedly connected with the piston; the upper end of the push rod extends out of the upper surface of the piston, a first spring is further coaxially sleeved and mounted on the push rod between the upper cylinder cover and the piston, and the upper end and the lower end of the first spring are fixedly connected with the lower surface of the upper cylinder cover and the upper surface of the piston respectively; the lower surface of the upper cylinder cover is also vertically provided with an adjusting rod coaxially, a certain distance is reserved between the lower end face of the adjusting rod and the upper end face of the push rod, the adjusting rod is inserted into the first spring, the upper end of the adjusting rod vertically extends upwards to the upper surface of the upper cylinder cover, and the adjusting rod is fixedly connected with the upper cylinder cover through a locking nut to adjust the movement stroke of the piston.
Preferably, the device further comprises a buffer mechanism; a plurality of buffer mechanisms are uniformly and vertically arranged on the upper surface of the lower cylinder cover at intervals along the circumferential direction, the fixed end of each buffer mechanism is fixedly connected with the lower cylinder cover in a threaded manner, and the buffer ends of the buffer mechanisms are vertically arranged upwards; each maximum stroke of the buffer mechanism moving downwards for buffering is 2-5 mm, and the valve rod is buffered by matching the buffer mechanism with the lower surface of the piston.
Preferably, each buffer mechanism comprises a buffer frame, a rubber pad, a pressing plate, a supporting rod, a second fixing plate, a bottom plate and a buffer spring; each buffer frame is of a horizontally arranged hollow cuboid structure, second fixing plates are horizontally and symmetrically welded at the upper positions of the left side and the right side of the buffer frame, the upper surface of each second fixing plate is coplanar with the upper surface of the corresponding buffer frame, and rubber pads are horizontally attached and fixedly arranged on the upper surfaces of the second fixing plates and the buffer frame respectively; a pressing plate is horizontally arranged in the middle of the inside of each buffer frame, each pressing plate is of a rectangular structure matched with the inside of the corresponding buffer frame, and the peripheral sides of the pressing plates are respectively abutted and attached to the inner side walls of the corresponding buffer frames; a plurality of buffer springs are uniformly and vertically arranged on the upper surface of each pressing plate at intervals in a matrix manner, the pre-tightening load of each buffer spring is 0.02-0.05 times of the theoretical output torque of the whole driving assembly, the upper end of each buffer spring is fixedly connected with the inner top surface of the corresponding buffer frame, and the lower end of each buffer spring is fixedly connected with the upper surface of the corresponding pressing plate; the four right angles of the lower surface of each pressing plate are also vertically and symmetrically provided with supporting rods, the upper end of each supporting rod is fixedly connected with the corresponding pressing plate, the lower end of each supporting rod vertically extends downwards to correspond to the lower surface of the buffering frame, each supporting rod is vertically and vertically slidably connected with the corresponding buffering frame, and the lower end of each supporting rod is fixedly connected with the upper surface of the bottom plate corresponding to the horizontal arrangement.
Preferably, a plurality of contact grooves are further horizontally embedded in the corresponding positions of the lower surface of the piston corresponding to the buffer mechanisms, and each contact groove is matched with a rubber pad corresponding to the buffer mechanism; the upper end of each buffer mechanism is in tight contact with the corresponding contact groove of the piston through a rubber pad, the lower end of each buffer mechanism is fixedly connected with the upper surface of the lower cylinder cover through a bottom plate in a screwed mode, and downward movement of the valve rod is buffered through the matching of the buffer mechanisms and the lower surface of the piston.
Preferably, an upper cavity vent hole is embedded in one side of the upper surface of the upper cylinder cover and is communicated with the upper cavity; a lower cavity vent is embedded in one side of the lower surface of the lower cylinder cover and communicated with the lower cavity; the piston drives the push rod to vertically move up and down through the auxiliary cooperation of the first spring.
Preferably, a first upper partition plate matched with the first cavity and the third cavity is horizontally arranged between the first cavity and the third cavity, the first upper partition plate is of an arc-shaped structure, the area of the first upper partition plate is smaller than the area of the cross section communicated between the first cavity and the third cavity, and the arc surface of the first upper partition plate is fixedly connected with one side, far away from the partition plate, of the inner circumferential surface of the horizontal part of the valve body and is integrally formed; a second upper partition plate matched with the second cavity is horizontally arranged between the second cavity and the third cavity and is of an arc-shaped structure, the area of the second upper partition plate is smaller than the area of the cross section communicated between the second cavity and the third cavity, and the arc surface of the second upper partition plate is fixedly connected with one side, away from the partition plate, of the inner circumferential surface of the horizontal part of the valve body and is integrally formed; the upper surface of baffle, the upper surface of baffle and in the upper end of baffle was located same horizontal plane in the upper surface of first last baffle, the second, and the bottom still cup joints with the axle center in the vertical part of valve body and is equipped with the annular step of circle, the lower fixed surface of step sets up the upper surface of baffle is gone up to first last baffle and second, and sets up in the coverage of diaphragm, it is fixed to support the diaphragm.
Preferably, the valve rod is of an inverted T-shaped structure which is horizontally arranged, the large-diameter end of the valve rod is arranged upwards, and the valve rod is coaxially screwed and fixed with the lower end of the push rod; the outer diameter of the large-diameter end of the valve rod is smaller than the inner diameter of the vertical part of the valve body, the section of the diaphragm is larger than that of the large-diameter end of the valve rod, and the inner diameter of the step is larger than that of the small-diameter end of the valve rod; the diaphragm is coaxially sleeved on the small-diameter end of the valve rod, the outer edge of the diaphragm is in sealing connection with the inner circumferential surface of the vertical part of the valve body, and the diaphragm is lapped on the upper surface of the step; the end face of the small diameter end of the valve rod is larger than the spacing area between the first upper partition plate and the partition plate, and a diaphragm is extruded downwards under the driving of a push rod and is abutted and lapped on the first upper partition plate and the partition plate to close a flow passage between the first cavity and the third cavity; and a first joint and a second joint are respectively arranged at two ends of the horizontal part of the valve body and are coaxially formed integrally.
Preferably, an equilibrium fluid is injected into the equilibrium cavity, and the equilibrium fluid is an inert liquid; working fluid is input from the first cavity and flows out from the second cavity through the third cavity, and the pressure of the working fluid is transmitted to the balance cavity through the diaphragm, so that the pressure balance of the upper side and the lower side of the diaphragm is realized.
The invention relates to a method for manufacturing a diaphragm valve with a balance effect, which is characterized by comprising the following steps of:
(1) vertically welding a partition plate on the right side of the center of the horizontal part of the valve body, horizontally welding a first upper partition plate at a corresponding position between the first cavity and the third cavity, horizontally welding a second upper partition plate at a corresponding position between the second cavity and the third cavity, and ensuring that the upper surface of the first upper partition plate, the upper surface of the second upper partition plate and the upper end surface of the partition plate are positioned in the same horizontal plane;
(2) welding a first joint coaxially at one end of the valve body, welding a second joint coaxially at the other end of the valve body, and integrally forming;
(3) performing electrolytic polishing on the valve body, the first joint and the second joint, and ensuring that the roughness of the inner surface of the valve body, the first joint and the second joint is less than 0.2 mu m;
(4) the diaphragm is coaxially welded and sleeved on the small-diameter end of the valve rod to ensure that the outer edge of the diaphragm is attached to the inner circumferential surface of the vertical part of the valve body and is in lap joint with the step, and then the inner part of the vertical part of the valve body is vertically divided into a balance cavity and a third cavity which are not communicated with each other;
(5) sleeving the piston in the cylinder body coaxially, and then screwing and fixing the fixed end of the buffer mechanism with the corresponding position on the upper surface of the lower cylinder cover respectively, wherein the buffer end of the buffer mechanism is vertically upwards arranged towards the direction of the corresponding contact groove;
(6) the push rod coaxially penetrates through the piston and the lower cylinder cover, and a first spring is coaxially sleeved on the push rod between the upper cylinder cover and the piston;
(7) the adjusting rod penetrates through and is inserted into the upper cylinder cover with the same axis, so that the adjusting rod is inserted into the first spring, and a certain distance is reserved between the lower end face of the adjusting rod and the upper end face of the push rod; the upper end of the adjusting rod is fixedly connected with the upper cylinder cover through a locking nut;
(8) the diaphragm valve with the balance effect is obtained by connecting the upper cylinder cover, the cylinder body and the lower cylinder cover into a hollow cylinder structure in a threaded manner, then connecting the lower end of the push rod with the large-diameter end of the valve rod in a coaxial threaded manner, finally fixing the valve body with the lower surface of the lower cylinder cover in a threaded manner through the first fixing plate, and injecting balance fluid into the balance cavity in advance.
The invention has the beneficial effects that:
(1) the balance cavity ensures that the pressures of the fluid on the upper side and the lower side of the diaphragm are the same, so that the phenomenon of rupture or plastic deformation caused by large stress on one side of the diaphragm is avoided;
(2) the adjusting rod is arranged, so that the movement stroke of the piston is effectively limited, the diaphragm is prevented from being damaged due to overlarge piston stroke, and the service life of the diaphragm valve is prolonged;
(3) the buffering mechanism is arranged to buffer the downward action of the piston, and the first spring is matched for use, so that the piston has a spring buffering function at the starting point and the end point of the stroke, and can be used in occasions with rapid and frequent actions;
(4) the buffering stroke of the buffering mechanism is accurate and controllable, and the buffering stroke is small, so that the response speed of the valve rod is not influenced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments are briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a diaphragm valve with a balancing effect in a closed state according to the present invention.
Fig. 2 is a schematic structural diagram of an open state of a diaphragm valve with a balancing effect according to the present invention.
Fig. 3 is a schematic structural view of the buffer mechanism in fig. 1.
Wherein, 1-cylinder body; 2, mounting a cylinder cover; 3-lower cylinder cover; 4-a piston; 5-contact grooves; 6-a buffer mechanism; 7-upper chamber vent; 8-lower cavity vent; 9-a first spring; 10-adjusting the rod; 11-a lock nut; 12-a push rod; 13-a valve stem; 14-a first fixing plate; 15-a valve body; 16-a separator; 17-a membrane sheet; 18-steps; 19-a first upper baffle; 20-a second upper baffle; 21-a first joint; 22-a second joint; 61-a buffer frame; 62-pressing plate; 63-support bars; 64-a base plate; 65-a buffer spring; 66-a second fixing plate; 67-rubber pad.
Detailed Description
The technical solution of the present invention will be clearly and completely described by the following embodiments.
The diaphragm valve with the balance effect and the manufacturing method thereof comprise a valve body 15, a partition plate 16, a driving assembly, a push rod 12, a valve rod 13 and a diaphragm 17; the specific structure is as shown in fig. 1 and fig. 2, the valve body 15 is a vertically arranged three-way structure, and two ends of the valve body are horizontally arranged; a partition plate 16 matched with the inside of the horizontal part of the valve body 15 is also vertically arranged on the right side of the center of the horizontal part of the valve body 15, and the horizontal part of the valve body 15 is divided into a first cavity and a second cavity by the partition plate 16; the push rod 12 is vertically sleeved in the vertical part of the valve body 15 coaxially at intervals, and the upper end of the push rod vertically extends upwards out of the valve body 15 and is linked with the driving assembly to vertically move up and down under the driving of the driving assembly.
The driving assembly comprises a cylinder body 1, an upper cylinder cover 2, a lower cylinder cover 3, a piston 4, an adjusting rod 10, a buffer mechanism 6, a first spring 9 and a locking nut 11; as shown in fig. 1 and 2, the cylinder body 1 is a cylindrical structure coaxially arranged with the vertical part of the valve body 15, and the upper end and the lower end of the cylinder body are both open; an upper cylinder cover 2 and a lower cylinder cover 3 are respectively and coaxially and horizontally attached to the upper end and the lower end of a cylinder body 1, and the upper cylinder cover 2, the cylinder body 1 and the lower cylinder cover 3 are fixedly connected into a hollow cylindrical structure through the matching of bolts and nuts; the upper end of the vertical part of the valve body 15 is also fixedly provided with a first fixing plate 14 in a coaxial sleeve manner, the upper surface of each first fixing plate 14 is coplanar with the upper end surface of the vertical part of the corresponding valve body 15, and the upper end of the vertical part of the valve body 15 is hermetically screwed and fixed with the lower surface of the lower cylinder cover 3 of the driving assembly through the first fixing plate 14; a piston 4 is coaxially arranged at a lower position in the middle of the inside of the cylinder body 1, and the piston 4 is vertically and vertically connected with the cylinder body 1 in a sliding manner through a sealing ring and divides the inside of the cylinder body 1 into an upper cavity and a lower cavity; the upper end of the push rod 12 sequentially extends vertically upwards, is vertically and vertically connected with the lower cylinder cover 3 in a sliding manner through a sealing ring, and is fixedly connected with the piston 4; the upper end of the push rod 12 extends out of the upper surface of the piston 4, a first spring 9 is coaxially sleeved on the push rod 12 between the upper cylinder cover 2 and the piston 4, and the upper end and the lower end of the first spring 9 are fixedly connected with the lower surface of the upper cylinder cover 2 and the upper surface of the piston 4 respectively; an adjusting rod 10 is also vertically arranged coaxially on the lower surface of the upper cylinder cover 2, a certain distance is reserved between the lower end face of the adjusting rod 10 and the upper end face of a push rod 12, the adjusting rod 10 is inserted into the first spring 9, the upper end of the adjusting rod vertically extends upwards to the upper surface of the upper cylinder cover 2, and the adjusting rod is fixedly connected with the upper cylinder cover 2 through a locking nut 11 to adjust the movement stroke of the piston 4.
According to the invention, a plurality of buffer mechanisms 6 are uniformly and vertically arranged on the upper surface of the lower cylinder cover 3 at intervals along the circumferential direction, as shown in fig. 1 and 2, the fixed end of each buffer mechanism 6 is fixedly connected with the lower cylinder cover 3 in a threaded manner, and the buffer end is vertically arranged upwards; the maximum stroke of the downward movement buffering of each buffering mechanism 6 is 2-5 mm, and the downward movement of the valve rod 13 is buffered through the matching of the buffering mechanisms 6 and the lower surface of the piston 4.
Each buffer mechanism 6 comprises a buffer frame 61, a rubber pad 67, a pressing plate 62, a support rod 63, a second fixing plate 66, a bottom plate 64 and a buffer spring 65; as shown in fig. 1 to 3, each buffer frame 61 is a horizontally arranged hollow rectangular structure, and second fixing plates 66 are horizontally and symmetrically welded at upper positions of the left and right sides of the buffer frame, the upper surface of each second fixing plate 66 is coplanar with the upper surface of the corresponding buffer frame 61, and rubber pads 67 are horizontally attached and fixed to the upper surfaces of the two; a pressing plate 62 is horizontally arranged in the middle of the inside of each buffer frame 61, each pressing plate 62 is of a rectangular structure matched with the inside of the corresponding buffer frame 61, and the peripheral sides of the pressing plates are respectively abutted and attached to the inner side walls of the corresponding buffer frames 61; a plurality of buffer springs 65 are uniformly and vertically arranged on the upper surface of each pressing plate 62 at intervals, the pre-tightening load of each buffer spring 65 is 0.02-0.05 times of the theoretical output torque of the whole driving assembly, the upper end of each buffer spring 65 is fixedly connected with the inner top surface of the corresponding buffer frame 61, and the lower end of each buffer spring 65 is fixedly connected with the upper surface of the corresponding pressing plate 62; the four right angles of the lower surface of each pressing plate 62 are also vertically and symmetrically provided with supporting rods 63, the upper end of each supporting rod 63 is fixedly connected with the corresponding pressing plate 62, the lower end of each supporting rod 63 vertically extends downwards to form the lower surface of the corresponding buffering frame 61, each supporting rod 63 is vertically and vertically connected with the corresponding buffering frame 61 in a sliding mode, and the lower end of each supporting rod is fixedly connected with the upper surface of the corresponding bottom plate 64 which is horizontally arranged.
As shown in fig. 1 and 2, a plurality of contact grooves 5 are further horizontally embedded in the corresponding positions of the lower surface of the piston 4 corresponding to each cushioning mechanism 6, and each contact groove 5 is matched with the rubber pad 67 of the corresponding cushioning mechanism 6; the upper end of each buffer mechanism 6 is tightly contacted with the corresponding contact groove 5 of the piston 4 through the rubber pad 67, the lower end of each buffer mechanism is fixed with the upper surface of the lower cylinder cover 3 through the bottom plate 64 in a threaded manner, and the downward action of the valve rod 13 is buffered through the matching of the buffer mechanisms 6 and the lower surface of the piston 4
An upper cavity vent 7 is embedded into one side of the upper surface of an upper cylinder cover 2, and the upper cavity vent 7 is communicated with an upper cavity; as shown in fig. 1 and 2, a lower cavity vent 8 is further embedded and formed in one side of the lower surface of the lower cylinder cover 3, and the lower cavity vent 8 is communicated with the lower cavity; the piston 4 drives the push rod 12 to vertically move up and down by inputting a power air source into the upper cavity through the upper cavity vent 7 or inputting a power air source into the lower cavity through the lower cavity vent 8 and through the auxiliary cooperation of the first spring 9.
The lower end of a push rod 12 is coaxially and spirally sleeved with a valve rod 13, the lower end of the valve rod 13 is coaxially sleeved with a diaphragm 17, the diaphragm 17 is matched with the inner part of the vertical part of a valve body 15, and the vertical part of the valve body 15 is divided into a balance cavity and a third cavity in an up-and-down mode; as shown in fig. 1 and fig. 2, the third cavity is respectively communicated with the first cavity and the second cavity, and forms a flow channel; the lower end section of the valve rod 13 is larger than the section of the communication part of the third cavity and the first cavity, and under the driving of the driving assembly, the push rod 12 drives the valve rod 13 to vertically move up and down and open or close the circulation channel.
A first upper partition plate 19 matched with the first cavity and the third cavity is horizontally arranged between the first cavity and the third cavity, the first upper partition plate 19 is of an arc-shaped structure, as shown in fig. 1 and 2, the area of the first upper partition plate 19 is smaller than the cross-sectional area of communication between the first cavity and the third cavity, and the arc surface of the first upper partition plate is fixedly connected with one side, away from the partition plate 16, of the inner circumferential surface of the horizontal part of the valve body 15 and is integrally formed; a second upper partition plate 20 matched with the second cavity is horizontally arranged between the second cavity and the third cavity, the second upper partition plate 20 is of an arc-shaped structure, the area of the second upper partition plate 20 is smaller than the area of the cross section communicated between the second cavity and the third cavity, and the arc surface of the second upper partition plate is fixedly connected with one side, away from the partition plate 16, of the inner circumferential surface of the horizontal part of the valve body 15 and is integrally formed; the upper surface of the first upper partition plate 19, the upper surface of the second upper partition plate 20 and the upper end surface of the partition plate 16 are arranged in the same horizontal plane, the bottom end of the vertical part of the valve body 15 is also sleeved with a circular step 18 in a coaxial mode, the lower surface of the step 18 is fixedly arranged on the upper surfaces of the first upper partition plate 19 and the second upper partition plate 20 and is arranged in the coverage range of the diaphragm 17, and the diaphragm 17 is supported and fixed.
The valve rod 13 is of an inverted T-shaped structure which is horizontally arranged, the large-diameter end of the valve rod is arranged upwards, and the valve rod is coaxially screwed and fixed with the lower end of the push rod 12; as shown in fig. 1 and 2, the outer diameter of the large diameter end of the valve rod 13 is smaller than the inner diameter of the vertical part of the valve body 15, the cross section of the diaphragm 17 is larger than that of the large diameter end of the valve rod 13, and the inner diameter of the step 18 is larger than that of the small diameter end of the valve rod 13; the diaphragm 17 is coaxially sleeved on the small-diameter end of the valve rod 13, the outer edge of the diaphragm is in sealing connection with the inner circumferential surface of the vertical part of the valve body 15, and the diaphragm is lapped on the upper surface of the step 18; the end face of the small diameter end of the valve rod 13 is larger than the spacing area between the first upper partition plate 19 and the partition plate 16, and the diaphragm 17 is pressed downward under the driving of the push rod 12 and is abutted and overlapped on the first upper partition plate 19 and the partition plate 16, so that the flow passage between the first cavity and the third cavity is closed, and the opening or closing of the flow passage is realized through the movement of the piston 4.
As shown in fig. 1 and 2, a first joint 21 and a second joint 22 are coaxially disposed at two ends of the horizontal portion of the valve body 15, and are integrally molded.
As shown in fig. 1 and 2, a balance fluid is injected into the balance cavity, and the balance fluid is an inert liquid; in the invention, working fluid is input from the first cavity and flows out from the second cavity through the third cavity, and in the process, the pressure of the working fluid is transmitted to the balance cavity through the diaphragm 17, so that the pressure balance of the upper side and the lower side of the diaphragm 17 is realized.
As shown in fig. 1 and 2, a method for manufacturing a diaphragm valve having a balance effect according to the present invention includes the steps of:
(1) vertically welding a partition plate 16 on the right side of the center of the horizontal part of the valve body 15, horizontally welding a first upper partition plate 19 at a corresponding position between the first cavity and the third cavity, horizontally welding a second upper partition plate 20 at a corresponding position between the second cavity and the third cavity, and ensuring that the upper surface of the first upper partition plate 19, the upper surface of the second upper partition plate 20 and the upper end surface of the partition plate 16 are positioned in the same horizontal plane;
(2) a first joint 21 is coaxially welded to one end of the valve body 15, and a second joint 22 is coaxially welded to the other end thereof, and integrally molded;
(3) electropolishing the valve body 15, the first joint 21 and the second joint 22 and ensuring an internal surface roughness of less than 0.2 μm;
(4) the diaphragm 17 is coaxially welded and sleeved on the small-diameter end of the valve rod 13, so that the outer edge of the diaphragm is ensured to be attached to the inner circumferential surface of the vertical part of the valve body 15 and is lapped on the step 18, and the inner part of the vertical part of the valve body 15 is further vertically divided into a balance cavity and a third cavity which are not communicated with each other;
(5) sleeving the piston 4 in the cylinder body 1 coaxially, and then screwing and fixing the fixed end of the buffer mechanism 6 with the corresponding position on the upper surface of the lower cylinder cover 3 respectively, wherein the buffer end of the buffer mechanism is vertically and upwards arranged towards the corresponding contact groove 5;
(6) the push rod 12 coaxially penetrates through the piston 4 and the lower cylinder cover 3, and a first spring 9 is coaxially sleeved on the push rod 12 between the upper cylinder cover 2 and the piston 4;
(7) the adjusting rod 10 is coaxially inserted into the upper cylinder cover 2 in a penetrating manner, so that the adjusting rod is inserted into the first spring 9, and a certain distance is kept between the lower end face of the adjusting rod and the upper end face of the push rod 12; the upper end of the adjusting rod 10 is fixedly connected with the upper cylinder cover 2 through a locking nut 11;
(8) the upper cylinder cover 2, the cylinder body 1 and the lower cylinder cover 3 are connected into a hollow cylinder structure in a threaded mode, the lower end of the push rod 12 is connected with the large-diameter end of the valve rod 13 in a threaded mode in the same axis, finally the valve body 15 is fixed with the lower surface of the lower cylinder cover 3 in a threaded mode through the first fixing plate 14, balance fluid is injected into the balance cavity in advance, and therefore the diaphragm valve with the balance effect is obtained.
The working principle of the invention is as follows:
(1) firstly, injecting balance fluid into a balance cavity in advance and sealing;
(2) opening a valve: as shown in fig. 2, a power air source is input into the lower cavity through the lower cavity vent 8 to drive the piston 4 to move upwards, at this time, the first spring 9 is compressed, and the valve rod 13 moves upwards along with the piston 4 to be far away from the first upper partition plate 19 and the partition plate 16, so that the circulation channel is opened, and the valve is opened; in the process, working fluid is input from the first cavity and flows out from the second cavity through the third cavity, and the pressure of the working fluid is transmitted to the balance cavity through the diaphragm 17, so that the pressure balance of the upper side and the lower side of the diaphragm 17 is realized;
(3) closing a valve: as shown in fig. 1, a power air source is input into the upper cavity through the upper cavity vent 7 to drive the piston 4 to move downwards, and then the valve rod 13 pushes the diaphragm 17 along with the downward movement of the piston 4 through the spring force assisted cooperation of the first spring 9, and the small-diameter end is abutted against and lapped on the first upper partition plate 19 and the partition plate 16, so that the flow passage between the first cavity and the third cavity is closed, and further the flow passage is closed, and the valve closing is realized.
The invention has the beneficial effects that:
(1) the invention ensures that the pressures of the fluid on the upper side and the lower side of the diaphragm 17 are the same through the balance cavity, thereby avoiding the phenomenon of rupture or plastic deformation caused by larger stress on one side of the diaphragm 17;
(2) according to the diaphragm valve, the adjusting rod 10 is arranged, so that the movement stroke of the piston 4 is effectively limited, the diaphragm 17 is prevented from being damaged due to overlarge stroke of the piston 4, and the service life of the diaphragm valve is prolonged;
(3) according to the invention, the buffering mechanism 6 is arranged to buffer the downward action of the piston 4, and the first spring 9 is matched for use, so that the piston 4 has a spring buffering function at the starting point and the end point of the stroke, and can be used in occasions with rapid and frequent actions;
(4) the buffer stroke of the buffer mechanism 6 is accurate and controllable, and the buffer stroke is small, so that the response speed of the valve rod 13 is not influenced.
The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should fall into the protection scope of the present invention without departing from the design concept of the present invention, and the technical contents of the present invention as claimed are all described in the technical claims.
Claims (10)
1. A diaphragm valve having a balancing effect, characterized in that: comprises a valve body, a clapboard, a driving component, a push rod, a valve rod and a diaphragm; the valve body is of a three-way structure which is vertically arranged, and two ends of the valve body are horizontally arranged; a partition board matched with the inside of the horizontal part of the valve body is vertically arranged on the right side of the center of the horizontal part of the valve body, and the horizontal part of the valve body is divided into a first cavity and a second cavity by the partition board; the push rod is vertically sleeved in the vertical part of the valve body with the same axis at intervals, and the upper end of the push rod vertically extends upwards out of the valve body and is linked with the driving assembly; the lower end of the push rod is coaxially and spirally sleeved with a valve rod, the lower end of the valve rod is coaxially sleeved with a diaphragm, the diaphragm is matched with the inner part of the vertical part of the valve body, and the vertical part of the valve body is divided into a balance cavity and a third cavity in an up-and-down mode; the third cavity is respectively communicated with the first cavity and the second cavity to form a circulation channel; the lower end section of the valve rod is larger than the section of the communication part of the third cavity and the first cavity, and the push rod drives the valve rod to vertically move up and down under the driving of the driving assembly and opens or closes the circulation channel.
2. A diaphragm valve having a balanced effect according to claim 1 wherein: the driving assembly comprises a cylinder body, an upper cylinder cover, a lower cylinder cover, a piston, an adjusting rod, a first spring and a locking nut; the cylinder body is of a cylindrical structure coaxially arranged with the vertical part of the valve body, and the upper end and the lower end of the cylinder body are both open; the upper end and the lower end of the cylinder body are respectively provided with an upper cylinder cover and a lower cylinder cover in a coaxial horizontal fit manner, and the upper cylinder cover, the cylinder body and the lower cylinder cover are fixedly connected into a hollow cylindrical structure through the matching of bolts and nuts; the upper end of the vertical part of the valve body is also coaxially sleeved and fixedly provided with a first fixing plate, the upper surface of each first fixing plate is coplanar with the upper end surface of the vertical part corresponding to the valve body, and the upper end of the vertical part of the valve body is hermetically screwed and fixed with the lower surface of the lower cylinder cover of the driving assembly through the first fixing plate; a piston is coaxially arranged at a lower position in the middle of the interior of the cylinder body, is vertically and vertically connected with the cylinder body in a sliding manner through a sealing ring, and vertically divides the interior of the cylinder body into an upper cavity and a lower cavity; the upper end of the push rod sequentially extends vertically upwards, is vertically and vertically connected with the lower cylinder cover in a sliding manner through a sealing ring, and is fixedly connected with the piston; the upper end of the push rod extends out of the upper surface of the piston, a first spring is coaxially sleeved on the push rod between the upper cylinder cover and the piston, and the upper end and the lower end of the first spring are fixedly connected with the lower surface of the upper cylinder cover and the upper surface of the piston respectively; the lower surface of the upper cylinder cover is also vertically provided with an adjusting rod coaxially, a certain distance is reserved between the lower end face of the adjusting rod and the upper end face of the push rod, the adjusting rod is inserted into the first spring, the upper end of the adjusting rod vertically extends upwards to the upper surface of the upper cylinder cover, and the adjusting rod is fixedly connected with the upper cylinder cover through a locking nut to adjust the movement stroke of the piston.
3. A diaphragm valve having a balanced effect according to claim 2, wherein: the device also comprises a buffer mechanism; a plurality of buffer mechanisms are uniformly and vertically arranged on the upper surface of the lower cylinder cover at intervals along the circumferential direction, the fixed end of each buffer mechanism is fixedly connected with the lower cylinder cover in a threaded manner, and the buffer end of each buffer mechanism is vertically arranged upwards; each maximum stroke of the buffer mechanism moving downwards for buffering is 2-5 mm, and the valve rod is buffered by matching the buffer mechanism with the lower surface of the piston.
4. A diaphragm valve having a balanced effect according to claim 3 wherein: each buffer mechanism comprises a buffer frame, a rubber pad, a pressing plate, a supporting rod, a second fixing plate, a bottom plate and a buffer spring; each buffer frame is of a horizontally arranged hollow cuboid structure, second fixing plates are horizontally and symmetrically welded at the upper positions of the left side and the right side of the buffer frame, the upper surface of each second fixing plate is coplanar with the upper surface of the corresponding buffer frame, and rubber pads are horizontally attached and fixedly arranged on the upper surfaces of the second fixing plates and the buffer frame respectively; a pressing plate is horizontally arranged in the middle of the inside of each buffer frame, each pressing plate is of a rectangular structure matched with the inside of the corresponding buffer frame, and the peripheral sides of the pressing plates are respectively abutted against and attached to the inner side walls of the corresponding buffer frames; a plurality of buffer springs are uniformly and vertically arranged on the upper surface of each pressing plate in a matrix at intervals, the pre-tightening load of each buffer spring is 0.02-0.05 times of the theoretical output torque of the whole driving assembly, the upper end of each buffer spring is fixedly connected with the inner top surface of the corresponding buffer frame, and the lower end of each buffer spring is fixedly connected with the upper surface of the corresponding pressing plate; and supporting rods are also vertically and symmetrically arranged at four right angles on the lower surface of each pressing plate, the upper end of each supporting rod is fixedly connected with the corresponding pressing plate, the lower end of each supporting rod vertically extends downwards to correspond to the lower surface of the buffering frame, each supporting rod is vertically and vertically slidably connected with the corresponding buffering frame, and the lower end of each supporting rod is fixedly connected with the upper surface of the bottom plate which is horizontally arranged and corresponds to the supporting rod.
5. A diaphragm valve with a balancing effect according to claim 4, wherein: a plurality of contact grooves are horizontally embedded in the corresponding positions of the lower surface of the piston, which correspond to the buffer mechanisms, respectively, and each contact groove is matched with the rubber pad corresponding to the buffer mechanism; each buffer gear's upper end supports tight contact through the rubber pad respectively in the corresponding contact recess of piston, and its lower extreme respectively through the bottom plate with the upper surface spiro union of lower cylinder cap is fixed, through the cooperation of buffer gear and piston lower surface, cushions the downward action of valve rod.
6. A diaphragm valve having a balanced effect according to claim 2 wherein: an upper cavity vent hole is embedded in one side of the upper surface of the upper cylinder cover and communicated with the upper cavity; a lower cavity vent is embedded in one side of the lower surface of the lower cylinder cover and communicated with the lower cavity; the piston drives the push rod to vertically move up and down by the auxiliary cooperation of the first spring after the power air source is input into the upper cavity through the upper cavity vent or the power air source is input into the lower cavity through the lower cavity vent.
7. A diaphragm valve having a balanced effect according to claim 1, wherein: a first upper partition plate matched with the first cavity and the third cavity is horizontally arranged between the first cavity and the third cavity, the first upper partition plate is of an arc-shaped structure, the area of the first upper partition plate is smaller than the area of the cross section communicated between the first cavity and the third cavity, and the arc surface of the first upper partition plate is fixedly connected with one side, away from the partition plate, of the inner circumferential surface of the horizontal part of the valve body and is integrally formed; a second upper partition plate matched with the second cavity is horizontally arranged between the second cavity and the third cavity, the second upper partition plate is of an arc-shaped structure, the area of the second upper partition plate is smaller than the area of the cross section communicated between the second cavity and the third cavity, and the arc surface of the second upper partition plate is fixedly connected with one side, away from the partition plate, of the inner circumferential surface of the horizontal part of the valve body and is integrally formed; the upper surface of baffle, the upper surface of baffle and in the upper end of baffle was located same horizontal plane in the upper surface of first last baffle, the second, and the bottom still cup joints with the axle center in the vertical part of valve body and is equipped with the annular step of circle, the lower fixed surface of step sets up the upper surface of baffle is gone up to first last baffle and second, and sets up in the coverage of diaphragm, it is fixed to support the diaphragm.
8. A diaphragm valve with a balancing effect according to claim 7, wherein: the valve rod is of an inverted T-shaped structure which is horizontally arranged, the large-diameter end of the valve rod is arranged upwards, and the valve rod is coaxially screwed and fixed with the lower end of the push rod; the outer diameter of the large-diameter end of the valve rod is smaller than the inner diameter of the vertical part of the valve body, the section of the diaphragm is larger than that of the large-diameter end of the valve rod, and the inner diameter of the step is larger than that of the small-diameter end of the valve rod; the diaphragm is coaxially sleeved on the small-diameter end of the valve rod, the outer edge of the diaphragm is in sealing connection with the inner circumferential surface of the vertical part of the valve body, and the diaphragm is lapped on the upper surface of the step; the end face of the small-diameter end of the valve rod is larger than a spacing area between the first upper partition plate and the partition plate, and a diaphragm is extruded downwards under the driving of a push rod and is abutted and lapped on the first upper partition plate and the partition plate to close a flow passage between the first cavity and the third cavity; and a first joint and a second joint are respectively arranged at two ends of the horizontal part of the valve body and are coaxially formed integrally.
9. A diaphragm valve having a balanced effect according to claim 8 wherein: injecting a balancing fluid into the balancing cavity, wherein the balancing fluid is an inert liquid; working fluid is input from the first cavity and flows out from the second cavity through the third cavity, and the pressure of the working fluid is transmitted to the balance cavity through the diaphragm, so that the pressure balance of the upper side and the lower side of the diaphragm is realized.
10. A method of manufacturing a diaphragm valve having a balance effect according to any one of claims 1 to 9, comprising the steps of:
(1) vertically welding a partition plate on the right side of the center of the horizontal part of the valve body, horizontally welding a first upper partition plate at a corresponding position between the first cavity and the third cavity, horizontally welding a second upper partition plate at a corresponding position between the second cavity and the third cavity, and ensuring that the upper surface of the first upper partition plate, the upper surface of the second upper partition plate and the upper end surface of the partition plate are positioned in the same horizontal plane;
(2) welding a first joint at one end of the valve body with the same axis, welding a second joint at the other end of the valve body with the same axis, and integrally forming;
(3) performing electrolytic polishing on the valve body, the first joint and the second joint, and ensuring that the roughness of the inner surface of the valve body, the first joint and the second joint is less than 0.2 mu m;
(4) the diaphragm is coaxially welded and sleeved on the small-diameter end of the valve rod to ensure that the outer edge of the diaphragm is attached to the inner circumferential surface of the vertical part of the valve body and is in lap joint with the step, and then the inner part of the vertical part of the valve body is vertically divided into a balance cavity and a third cavity which are not communicated with each other;
(5) sleeving the piston in the cylinder body coaxially, then screwing and fixing the fixed end of the buffer mechanism with the corresponding position on the upper surface of the lower cylinder cover respectively, and vertically and upwards arranging the buffer end of the buffer mechanism towards the corresponding contact groove;
(6) the push rod coaxially penetrates through the piston and the lower cylinder cover, and a first spring is sleeved and installed on the push rod between the upper cylinder cover and the piston coaxially;
(7) the adjusting rod penetrates through and is inserted into the upper cylinder cover with the same axis, so that the adjusting rod is inserted into the first spring, and a certain distance is reserved between the lower end face of the adjusting rod and the upper end face of the push rod; the upper end of the adjusting rod is fixedly connected with the upper cylinder cover through a locking nut;
(8) the diaphragm valve with the balance effect is obtained by connecting the upper cylinder cover, the cylinder body and the lower cylinder cover into a hollow cylinder structure in a threaded manner, then connecting the lower end of the push rod with the large-diameter end of the valve rod in a coaxial threaded manner, finally fixing the valve body with the lower surface of the lower cylinder cover in a threaded manner through the first fixing plate, and injecting balance fluid into the balance cavity in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210528231.4A CN114776832A (en) | 2022-05-16 | 2022-05-16 | Diaphragm valve with balance effect and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210528231.4A CN114776832A (en) | 2022-05-16 | 2022-05-16 | Diaphragm valve with balance effect and manufacturing method thereof |
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| CN114776832A true CN114776832A (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210528231.4A Pending CN114776832A (en) | 2022-05-16 | 2022-05-16 | Diaphragm valve with balance effect and manufacturing method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04254006A (en) * | 1991-02-01 | 1992-09-09 | Fuji Oozx Kk | By-path valve with actuator |
| CN105650302A (en) * | 2016-04-01 | 2016-06-08 | 天津特克执行器有限公司 | High-pressure diaphragm valve provided with balance cavities |
| WO2018111675A1 (en) * | 2016-12-13 | 2018-06-21 | Tyco Fire Products Lp | Fluid control valve having diaphragm that exclusively biases to closed position and methods of fluid control |
| CN111306137A (en) * | 2020-03-05 | 2020-06-19 | 浙江中德自控科技股份有限公司 | Spring buffering type pneumatic actuating mechanism |
| CN216382779U (en) * | 2021-06-22 | 2022-04-26 | 江苏德康高中压阀门制造股份有限公司 | Pneumatic actuator with buffering effect |
-
2022
- 2022-05-16 CN CN202210528231.4A patent/CN114776832A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04254006A (en) * | 1991-02-01 | 1992-09-09 | Fuji Oozx Kk | By-path valve with actuator |
| CN105650302A (en) * | 2016-04-01 | 2016-06-08 | 天津特克执行器有限公司 | High-pressure diaphragm valve provided with balance cavities |
| WO2018111675A1 (en) * | 2016-12-13 | 2018-06-21 | Tyco Fire Products Lp | Fluid control valve having diaphragm that exclusively biases to closed position and methods of fluid control |
| CN111306137A (en) * | 2020-03-05 | 2020-06-19 | 浙江中德自控科技股份有限公司 | Spring buffering type pneumatic actuating mechanism |
| CN216382779U (en) * | 2021-06-22 | 2022-04-26 | 江苏德康高中压阀门制造股份有限公司 | Pneumatic actuator with buffering effect |
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