CN110332348B - Emergency cut-off valve - Google Patents
Emergency cut-off valve Download PDFInfo
- Publication number
- CN110332348B CN110332348B CN201910745257.2A CN201910745257A CN110332348B CN 110332348 B CN110332348 B CN 110332348B CN 201910745257 A CN201910745257 A CN 201910745257A CN 110332348 B CN110332348 B CN 110332348B
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- Prior art keywords
- valve
- limiting
- guide sleeve
- sleeve
- rod
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- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims description 38
- 238000007906 compression Methods 0.000 claims description 38
- 230000007246 mechanism Effects 0.000 claims description 31
- 229910000743 fusible alloy Inorganic materials 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
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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
-
- 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
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/46—Mechanical actuating means for remote operation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention provides an emergency shut-off valve, wherein a valve core is fixed at the end part of a valve rod, a valve seat is provided with a valve port matched with the valve core, the emergency shut-off valve also comprises an elastic component and a limiting component, the elastic component is arranged on the valve rod, and the elastic component has elastic force for enabling the valve core to move towards the valve port; the limiting component is matched with the elastic component, and the limiting component can be switched between two states of limiting the elastic component and releasing the elastic component; when the limiting component limits the elastic component, a gap is kept between the valve core and the valve port; when the limiting component releases the elastic component, the valve core is in sealing fit with the valve port. This emergency shut-off valve through setting up the elastic component that has elastic force and can restrict the spacing subassembly of elastic component, releases the elastic component through spacing subassembly's remote control or self-motion, when meetting emergency, and the valve can resume to the closed state rapidly, does not need the manual closure, can not cause permanent damage to valve itself moreover, can used repeatedly.
Description
Technical Field
The invention relates to an emergency shut-off valve.
Background
Most of the current shut-off valves in the market are in a closed state by rotating a hand wheel at the top of the valve to push down an internal valve core to the bottom so as to seal the valve core and a valve seat. However, closing the valve by means of a hand wheel requires manual effort and time, and in case of emergency, requires the first time to evacuate the workers and to be far away from the pressure vessel and the pressure pipe etc., at which time we face two options if we are still using a conventional shut-off valve:
1. All personnel are evacuated directly. In this way, the medium in the pressure vessel or the pipe is still being discharged. If the gas is inflammable and explosive, the gas is likely to cause explosion when encountering open fire, and larger property loss is caused.
2. The operator is arranged to close the valve before. In this way, personnel cannot evacuate in time and access to the pressure vessel or pipe is required, which is extremely dangerous.
Disclosure of Invention
The invention aims to provide an emergency shut-off valve, which solves the problem that the shut-off valve is difficult to close in emergency.
In order to solve the problems, the invention provides the following technical scheme:
the invention provides an emergency shut-off valve, which comprises a valve seat, a valve rod and a valve core, wherein the valve core is fixed at the end part of the valve rod, the valve seat is provided with a valve port matched with the valve core, and the emergency shut-off valve further comprises:
the elastic component is arranged on the valve rod and has elastic force for enabling the valve core to move towards the valve port;
The limiting component is matched with the elastic component and can be switched between two states of limiting the elastic component and releasing the elastic component; when the limiting component limits the elastic component, a gap is kept between the valve core and the valve port; when the limiting component releases the elastic component, the valve core is in sealing fit with the valve port.
In this technical scheme, through setting up elastic component, spacing subassembly, make when taking place the emergency, do not need the manual work to close the valve, through spacing subassembly's remote control or the release elastic component of action by oneself, can close the valve, avoid the production of dangerous condition.
Preferably, the elastic assembly comprises:
The valve rod is connected with the valve seat through a valve rod, and the valve rod is connected with the valve seat through a valve rod;
the valve cover covers the end face, far away from the valve rod, of the supporting sleeve;
The guide sleeve is positioned in the support sleeve, and the guide sleeve is fixed with the end part of the valve rod positioned in the support sleeve; the guide sleeve is matched with the limiting assembly, and the limiting assembly can be switched between two states of limiting the guide sleeve and releasing the guide sleeve;
The elastic body is positioned in the supporting sleeve, and two ends of the elastic body are respectively propped against the valve cover and the guide sleeve.
In the technical scheme, the guide sleeve is limited or released through the limiting component, and the valve is controlled to be opened or closed, so that a pipeline connected with the valve is switched in a communicated or closed state.
Preferably, the valve rod is coaxially arranged with the support sleeve, the outer circumferential surface of the guide sleeve is matched with the inner circumferential surface of the support sleeve, and the guide sleeve can slide along the axial direction of the support sleeve.
In the technical scheme, through the arrangement, the moving direction of the guide sleeve is limited by the supporting sleeve, so that the moving direction of the valve rod and the valve core is controlled, and the valve core can be accurately matched with the valve port in a sealing way.
Preferably, a sealing ring which is arranged around the circumference is arranged between the guide sleeve and the supporting sleeve.
In this technical scheme, the sealing washer makes and has formed a relatively airtight space between uide bushing and the support sleeve, and when the uide bushing obtains releasing rapid downward movement, the inside negative pressure that produces in space can play the cushioning effect, protects the case not damaged.
Preferably, the elastic body is a compression spring, the surface of the valve cover facing the compression spring forms a convex first positioning protrusion, the surface of the guide sleeve facing the compression spring forms a convex second positioning protrusion, and two ends of the compression spring are respectively sleeved on the first positioning protrusion and the second positioning protrusion.
In the technical scheme, the two ends of the compression spring are fixed by the first positioning bulge and the second positioning bulge, so that the deformation direction of the compression spring is controllable.
Preferably, the elastic body is a compression spring, a positioning hole is formed in the surface, facing the compression spring, of the guide sleeve, the compression spring stretches into the positioning hole, and the positioning hole and the valve rod are coaxially arranged.
In the technical scheme, the positioning hole surrounds the compression spring, limits the direction of axial deformation of the compression spring, and ensures that the force application direction of the compression spring points to the valve port.
Preferably, the elastic component further comprises a magnetic piece, the magnetic piece is arranged on one side, far away from the elastic body, of the guide sleeve, one end, facing the magnetic piece, of the guide sleeve is magnetic, and an attraction force is formed between the guide sleeve and the magnetic piece.
In the technical scheme, the guide sleeve, the valve rod and the valve core are connected, so that the strong suction force between the guide sleeve and the magnetic piece is converted into the pressure of the valve core to the valve port, and the sealing effect between the valve core and the valve port is enhanced.
Preferably, the valve cover includes:
The cover main body is fixedly connected with the end face of the supporting sleeve;
The movable end plate is positioned in the supporting sleeve, and the elastic body is propped against the movable end plate;
The adjusting rod is used for connecting the movable end plate with the cover main body and can adjust the distance between the movable end plate and the cover main body.
In this technical scheme, adjust the distance between movable end plate and the lid main part through adjusting the pole, make the distance between movable end plate and the uide bushing adjustable to the degree of compression of the elastomer that is located between movable end plate and the uide bushing is adjusted, with the size of the elastic force of adjustment elastomer.
Preferably, the elastic component comprises a supporting sleeve and a guide sleeve, the supporting sleeve is relatively fixed with the valve seat, the guide sleeve is relatively fixed with the valve rod, the guide sleeve is elastically connected with the supporting sleeve, the supporting sleeve is provided with a sliding groove, and the guide sleeve is provided with a sliding column which is positioned in the sliding groove and can slide along the sliding groove;
The limiting assembly comprises a limiting rod, and the limiting rod can be switched between two states of propping against or being far away from the sliding column; when the limiting rod is propped against the sliding column, the sliding column is positioned at one end of the sliding groove far away from the valve core, so that a gap is kept between the valve core and the valve port; when the limiting rod is far away from the sliding column, the sliding column slides towards one end, close to the valve core, of the sliding groove until the valve core is in sealing fit with the valve port.
In the technical scheme, the limit rod can limit or release the sliding column through the movement of the limit rod, and the positions of the guide sleeve, the valve rod and the valve core are adjusted through limiting the position of the sliding column in the sliding groove, so that the valve is opened and closed.
Preferably, the limiting assembly further comprises:
The unlocking mechanism is matched with the limiting rod; when the unlocking mechanism acts, the limiting rod can be far away from the sliding column;
and the retaining mechanism is matched with the unlocking mechanism and can be switched between two states of prohibiting or allowing the unlocking mechanism to act.
In the technical scheme, the automatic unlocking of the limiting rod is realized by arranging the unlocking mechanism and the holding mechanism and automatically operating the holding mechanism by remote control of the holding mechanism or setting of the triggering condition.
Preferably, the guide sleeve is located in the support sleeve, the sliding groove is arranged around the circumference of the support sleeve, and the sliding column is arranged on the outer circumferential surface of the guide sleeve.
In this technical scheme, above-mentioned structure sets up, makes the moving path of traveller in the spout, uide bushing in the moving path of support sleeve, keeps stable, can not appear blocking.
Preferably, a concave area is arranged on the outer peripheral surface of the guide sleeve, and the concave area is provided with a sliding edge parallel to the extending direction of the sliding groove; the inner peripheral surface of the support sleeve is provided with a support column, and the end part of the support column is matched with the sliding edge of the concave area and slides relatively.
In this technical scheme, the design of sliding edge plays the supporting role when the uide bushing moves down, has guaranteed the stability when the uide bushing moves down.
Preferably, the elastic component further comprises a ball, a concave hole is formed at the end of the supporting column, the ball is placed in the concave hole, and the ball is contacted with the sliding edge of the concave area.
In this technical scheme, the ball contacts with the sliding edge in depressed area, has reduced the wearing and tearing between uide bushing and the support sleeve.
Preferably, the limiting assembly further comprises a supporting frame, the supporting frame and the valve seat are relatively fixed, the limiting rod is pivoted on the supporting frame, and a limiting bump is arranged at one end of the limiting rod; in the rotation process of the limiting rod, the limiting lug can prop against the sliding column.
In the technical scheme, the limit and release of the sliding column are realized through the rotation of the limit rod.
Preferably, the limiting assembly further comprises:
the unlocking mechanism comprises an unlocking block and a force application piece, wherein the unlocking block is provided with a pushing part, and the force application piece can apply pushing force to the unlocking block;
The retaining mechanism comprises a baffle and a stop block, the baffle is relatively fixed with the supporting frame, the stop block is arranged between the baffle and the unlocking block, the force application piece is positioned at one end of the unlocking block, which is far away from the stop block, one end of the limiting rod, which is provided with the limiting lug, is positioned at one side of the pushing part of the unlocking block, which faces the stop block, and the stop block can move or deform to enable a gap to be generated between the baffle and the unlocking block.
In this technical scheme, when the emergency appears, the dog can be removed or take place to warp, makes the clearance between baffle and the unblock piece, makes the push part of unblock piece promote the gag lever post, and the spacing lug of gag lever post can break away from the traveller, reaches the purpose of release traveller.
Preferably, the limiting rod rotates to a horizontal position, and the limiting lug abuts against the sliding column; one end of the limiting rod, provided with the limiting protruding block, is placed above the pushing part of the unlocking block, the force application part is located below the unlocking block, and the stop block is located above the unlocking block.
In the technical scheme, the position of the limiting rod for limiting the sliding column is set to be a horizontal position, and when the sliding column needs to be released, the sliding column can be released only by pressing down one end of the limiting rod, which is far away from the limiting convex block; the position setting is convenient to set, is convenient for structural design of designers, and is convenient to be matched with other parts.
Preferably, the stop is made of a fusible alloy.
In the technical scheme, when the ambient temperature reaches the melting point of the fusible alloy, the stop block is automatically melted, the sliding column is released, and the guide sleeve, the valve rod and the valve core move until the valve core is in sealing fit with the valve port.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
This emergency shut-off valve through setting up the elastic component that has elastic force and can restrict the spacing subassembly of elastic component, releases the elastic component through spacing subassembly's remote control or self-motion, when meetting emergency, and the valve can resume to the closed state rapidly, does not need the manual closure, can not cause permanent damage to valve itself moreover, can used repeatedly.
Drawings
Fig. 1 is a schematic structural view of the emergency shut-off valve of the present invention.
Fig. 2 is a schematic cross-sectional view of the slam-shut valve shown in fig. 1.
Fig. 3 is an enlarged partial view of the emergency shutdown valve shown in fig. 2.
Fig. 4 is a schematic view of the structure of the emergency shut-off valve shown in fig. 1 with the support frame and the baffle removed.
Fig. 5a to 5b are schematic structural views of a guide bush of the emergency shut-off valve shown in fig. 1.
Fig. 6a to 6b are schematic structural views of a support sleeve of the emergency shut-off valve shown in fig. 1.
Description of the reference numerals
Valve seat 1, inlet 11, outlet 12, valve rod 2, valve core 3, valve port 4;
The elastic component 5, the supporting sleeve 51, the sliding chute 511, the supporting column 512, the concave hole 513, the valve cover 52, the first positioning protrusion 521, the cover main body 522, the movable end plate 523, the adjusting rod 524, the guide sleeve 53, the second positioning protrusion 531, the positioning hole 532, the sliding column 533, the concave area 534, the sliding edge 535, the sliding column mounting hole 536, the elastic body 54, the compression spring 541, the sealing ring 55, and the magnetic member 56;
The stopper includes a stopper assembly 6, a stopper rod 61, a stopper projection 611, a support frame 62, an unlocking mechanism 63, an unlocking block 631, a biasing member 632, a pushing unit 633, a holding mechanism 64, a shutter 641, and a stopper 642.
Detailed Description
The present invention will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be construed to limit the scope of the present invention in terms of the content of this specific embodiment.
The emergency shut-off valve generally comprises a valve seat 1, a valve rod 2 and a valve core 3, wherein the valve core 3 is fixed at the end part of the valve rod 2, and the valve seat 1 is provided with a valve port 4 matched with the valve core 3. The valve port 4 communicates the inlet 11 and the outlet 12 of the valve seat 1. During normal operation, the valve core 3 keeps a distance from the valve port 4, so that the inlet 11 and the outlet 12 are communicated. When an emergency situation occurs, the valve rod 2 drives the valve core 3 to move, so that the valve core 3 is in sealing fit with the valve port 4, and the inlet 11 and the outlet 12 are cut off, so that a pipeline connected with the emergency cut-off valve is cut off.
Fig. 1 to 4 show an embodiment of the emergency shut-off valve according to the present invention. The emergency shut-off valve also comprises an elastic component 5 and a limiting component 6, wherein the elastic component 5 is arranged on the valve rod 2, and the elastic component 5 has elastic force for enabling the valve core 3 to move towards the valve port 4; the limiting component 6 is matched with the elastic component 5, and the limiting component 6 can be switched between two states of limiting the elastic component 5 and releasing the elastic component 5; when the limiting component 6 limits the elastic component 5, a gap is kept between the valve core 3 and the valve port 4; when the limiting component 6 releases the elastic component 5, the valve core 3 is in sealing fit with the valve port 4.
In the normal working process, the elastic component 5 is limited by the limiting component 6, so that a gap is kept between the valve core 3 and the valve port 4, and the pipeline is kept in a communicated state. When an emergency occurs, the limiting component 6 releases the elastic component 5 in a remote control or environment change self-motion detection mode, the elastic force of the elastic component 5 is released, and the valve rod 2 drives the valve core 3 to move towards the valve port 4 until the valve core 3 is in sealing fit with the valve port 4. Through setting up elastic component 5, spacing subassembly 6, make when taking place the emergency, do not need the manual work to close the valve, through the remote control of spacing subassembly 6 or the release elastic component 5 of action by oneself, can close the valve, avoid the production of dangerous condition.
A specific construction of the elastic assembly 5 is shown in fig. 1 to 3. The elastic component 5 comprises a supporting sleeve 51, a valve cover 52, a guide sleeve 53 and an elastic body 54, wherein the supporting sleeve 51 is relatively fixed with the valve seat 1, and one end of the valve rod 2, which is far away from the valve core 3, extends into the supporting sleeve 51; the valve cap 52 covers the end surface of the support sleeve 51 away from the valve rod 2; the guide sleeve 53 is positioned in the support sleeve 51, and the guide sleeve 53 is fixed with the end part of the valve rod 2 positioned in the support sleeve 51; the guide sleeve 53 is matched with the limiting component 6, and the limiting component 6 can be switched between two states of limiting the guide sleeve 53 and releasing the guide sleeve 53; the elastic body 54 is positioned in the supporting sleeve 51, and two ends of the elastic body 54 respectively prop against the valve cover 52 and the guide sleeve 53.
The elastic body 54 is preferably a compression spring 541. The elastic body 54 always applies a pushing force to the guide sleeve 53, which is directed to the valve port 4. When the limiting component 6 limits the guide sleeve 53, the guide sleeve 53 does not displace, so that a gap is kept between the valve core 3 and the valve port 4, and the pipeline is kept in a communicated state. When the limiting component 6 releases the guide sleeve 53, the elastic body 54 pushes the guide sleeve 53, so that the guide sleeve 53, together with the valve rod 2 and the valve core 3, moves towards the valve port 4 until the valve core 3 is in sealing fit with the valve port 4.
Wherein, valve rod 2 and support sleeve 51 coaxial arrangement, the outer peripheral face of uide bushing 53 cooperatees with the inner peripheral face of support sleeve 51, and uide bushing 53 can be along the axial slip of support sleeve 51. By the arrangement, the moving direction of the guide sleeve 53 is limited by the support sleeve 51, so that the moving direction of the valve rod 2 and the valve core 3 is controlled, and the valve core 3 can be accurately matched with the valve port 4 in a sealing way.
Wherein, a sealing ring 55 which is arranged around the circumferential direction is arranged between the guide sleeve 53 and the supporting sleeve 51. The sealing ring 55 forms a relatively airtight space between the guide sleeve 53 and the supporting sleeve 51, and when the guide sleeve 53 is released to rapidly move downwards, negative pressure generated in the space can play a role of buffering to protect the valve core 3 from being damaged.
Wherein, the surface of the valve cover 52 facing the compression spring 541 forms a convex first positioning protrusion 521, the surface of the guide sleeve 53 facing the compression spring 541 forms a convex second positioning protrusion 531, and two ends of the compression spring 541 are respectively sleeved on the first positioning protrusion 521 and the second positioning protrusion 531. The first positioning protrusion 521 and the second positioning protrusion 531 fix both ends of the compression spring 541, so that the deformation direction of the compression spring 541 is controllable.
In addition, a positioning hole 532 is formed in the surface of the guide sleeve 53 facing the compression spring 541, the compression spring 541 extends into the positioning hole 532, and the positioning hole 532 is disposed coaxially with the valve stem 2. The positioning hole 532 surrounds the compression spring 541, limits the direction of axial deformation of the compression spring 541, and ensures that the force application direction of the compression spring 541 is directed toward the valve port 4. Wherein the second positioning protrusion 531 is located at the bottom of the positioning hole 532, and one end of the compression spring 541 extending into the positioning hole 532 is limited by the second positioning protrusion 531.
In this embodiment, the elastic body 54 is a compression spring 541. In practice, the number of the compression springs 541 may be set according to the required elastic force of the elastic body 54, and is not limited to one.
As shown in fig. 3, the elastic component 5 further includes a magnetic member 56, where the magnetic member 56 is disposed on a side of the guide sleeve 53 away from the elastic body 54, and one end of the guide sleeve 53 facing the magnetic member 56 has magnetism, and an attraction force is provided between the guide sleeve 53 and the magnetic member 56. The magnetic member 56 will exert an attractive force on the guide sleeve 53. When the valve is about to close, the guide sleeve 53 moves downward, gradually approaching the magnetic member 56, and the attractive force between the guide sleeve 53 and the magnetic member 56 increases rapidly. Because the guide sleeve 53, the valve rod 2 and the valve core 3 are connected, the strong suction force between the guide sleeve 53 and the magnetic piece 56 is converted into the pressure of the valve core 3 to the valve port 4, and the sealing effect between the valve core 3 and the valve port 4 is enhanced. The guide sleeve 53 may be made of 45# steel, and the magnetic member 56 may be made of magnetic steel, so that an attraction force is generated between the guide sleeve 53 and the magnetic member 56.
As shown in fig. 3, the valve cover 52 includes a cover main body 522, a movable end plate 523 and an adjusting lever 524, and the cover main body 522 is fixedly connected with an end surface of the support sleeve 51; the movable end plate 523 is positioned in the supporting sleeve 51, and the elastic body 54 is abutted against the movable end plate 523; the movable end plate 523 is connected to the cover main body 522 by an adjustment lever 524, and the adjustment lever 524 can adjust the distance between the movable end plate 523 and the cover main body 522.
The distance between the movable end plate 523 and the cover main body 522 is adjusted by the adjusting rod 524, so that the distance between the movable end plate 523 and the guide sleeve 53 is adjustable, and the compression degree of the elastic body 54 between the movable end plate 523 and the guide sleeve 53 is adjusted, so as to adjust the elastic force of the elastic body 54.
The end of the adjusting rod 524 is fixedly connected with the movable end plate 523, and the adjusting rod 524 passes through the cover main body 522 and is screwed with the cover main body 522. When the movable end plate 523 needs to be adjusted, the adjusting lever 524 is turned to adjust the position of the adjusting lever 524 relative to the cover main body 522, i.e., the distance between the movable end plate 523 and the cover main body 522 can be adjusted.
One mating relationship of the spring assembly 5 and the stop assembly 6 is shown in fig. 1-4. The supporting sleeve 51 of the elastic assembly 5 is provided with a sliding groove 511, the guiding sleeve 53 is provided with a sliding column 533, and the sliding column 533 is positioned in the sliding groove 511 and can slide along the sliding groove 511. The limiting component 6 comprises a limiting rod 61, and the limiting rod 61 can be switched between two states of propping against or keeping away from the sliding column 533; when the limit rod 61 abuts against the sliding column 533, the sliding column 533 is positioned at one end of the sliding groove 511 away from the valve core 3, so that a gap is kept between the valve core 3 and the valve port 4; when the limit rod 61 is far away from the sliding column 533, the sliding column 533 slides towards one end of the sliding groove 511 close to the valve core 3 until the valve core 3 is in sealing fit with the valve port 4.
When the limit rod 61 abuts against the sliding column 533 and the sliding column 533 is located at one end of the sliding groove 511 away from the valve core 3, the guide sleeve 53 is located at an upper position, so that a gap is kept between the valve core 3 and the valve port 4, and the pipeline is kept in a communicating state. When the limit rod 61 is separated from the sliding column 533, the guide sleeve 53 moves downwards under the action of the elastic body 54, and the sliding column 533 moves in the sliding groove 511 until the valve core 3 is in sealing fit with the valve port 4.
Wherein, the guide sleeve 53 is located in the support sleeve 51, the chute 511 is disposed around the circumference of the support sleeve 51, and the sliding column 533 is disposed on the outer circumferential surface of the guide sleeve 53. The slide groove 511 is spirally arranged around the circumference of the support sleeve 51, and the guide sleeve 53 is also rotated during the downward process.
As shown in fig. 5a to 5b and fig. 6a to 6b, the outer circumferential surface of the guide sleeve 53 is provided with a recessed area 534, and the recessed area 534 is provided with a sliding edge 535 parallel to the extending direction of the chute 511; the support sleeve 51 has a support post 512 provided on its inner circumferential surface, and the end of the support post 512 is engaged with and slides relative to the sliding edge 535 of the recess 534. As the guide sleeve 53 moves downward, the sliding edge 535 of the guide sleeve 53 slides over the support post 512. The design of the sliding edge 535 plays a supporting role when the guide sleeve 53 moves downwards, so that the stability of the guide sleeve 53 when moving downwards is ensured.
The spring assembly 5 further includes balls, the ends of the support posts 512 defining recesses 513, the balls being disposed in the recesses 513, the balls contacting sliding edges 535 of the recessed areas 534. The balls contact the sliding edges 535 of the recessed area 534, and when the sliding edges 535 of the recessed area 534 slide relative to the support post 512, the balls roll within the recessed holes 513, reducing wear between the guide sleeve 53 and the support sleeve 51.
As shown in fig. 5b, the outer peripheral surface of the guide bush 53 is provided with a spool mounting hole 536, and the spool 533 is fixedly inserted into the spool mounting hole 536.
As shown in fig. 4, the limiting assembly 6 further includes a supporting frame 62, the supporting frame 62 is fixed relative to the valve seat 1, the limiting rod 61 is pivoted on the supporting frame 62, and a limiting bump 611 is disposed at one end of the limiting rod 61; during the rotation of the limit lever 61, the limit projection 611 can abut against the sliding post 533. The limit and release of the spool 533 is achieved by rotation of the limit lever 61.
In order to realize automatic unlocking of the limit rod 61, the limit assembly 6 further comprises an unlocking mechanism 63 and a retaining mechanism 64, wherein the unlocking mechanism 63 is matched with the limit rod 61; when the unlocking mechanism 63 acts, the limit rod 61 can be far away from the sliding column 533; the holding mechanism 64 is engaged with the unlocking mechanism 63, and the holding mechanism 64 can be switched between two states in which the unlocking mechanism 63 is prohibited or permitted to operate.
Specifically, the unlocking mechanism 63 includes an unlocking block 631 and a biasing member 632, the unlocking block 631 having a pushing portion 633, the biasing member 632 being capable of biasing the unlocking block 631; the retaining mechanism 64 includes a blocking plate 641 and a blocking plate 642, the blocking plate 641 is relatively fixed to the supporting frame 62, the blocking plate 642 is disposed between the blocking plate 641 and the unlocking block 631, the urging member 632 is located at one end of the unlocking block 631 away from the blocking plate 642, one end of the limit lever 61 where the limit projection 611 is disposed is located at one side of the pushing portion 633 of the unlocking block 631 facing the blocking plate 642, and the blocking plate 642 can move or deform to generate a gap between the blocking plate 641 and the unlocking block 631.
The force application member 632 may be a spring, and in the normal operation, the spring is in a compressed state for a long time, and always applies a certain pushing force to the unlocking block 631.
In the present embodiment, the limiting rod 61 rotates to the horizontal position, and the limiting bump 611 abuts against the sliding column 533; one end of the limiting rod 61 provided with the limiting projection 611 is placed above the pushing portion 633 of the unlocking block 631, the force application member 632 is located below the unlocking block 631, and the stop 642 is located above the unlocking block 631. In addition to the position setting of the present embodiment, the position of the stopper rod 61 to lock the position of the spool 533 may be set as needed. The relative positions of the unlocking mechanism 63, the holding mechanism 64 and the stopper rod 61 are also set according to the rotational direction when the stopper rod 61 is unlocked.
During normal operation, the stopper 642 is disposed between the blocking plate 641 and the unlocking block 631, so that the unlocking block 631 does not generate thrust to the limit rod 61. When an emergency occurs, the stopper 642 is moved or deformed to generate a gap between the baffle 641 and the unlocking block 631, and the force application member 632 applies a pushing force to the unlocking block 631, so that the pushing portion 633 of the unlocking block 631 pushes the limit lever 61, and the limit projection 611 of the limit lever 61 can be separated from the slide post 533, thereby achieving the purpose of releasing the slide post 533.
The block 642 may be moved out by remote control to create a gap between the shutter 641 and the unlocking block 631. The block 642 may be made of a variable material, and when the environment is changed, the block 642 itself is deformed, so that a gap is formed between the blocking plate 641 and the unlocking block 631.
For example, the stop 642 may be made of a fusible alloy. When a fire occurs, as the ambient temperature rises, the melting point of the fusible alloy is reached, the stop 642 is automatically melted, the force application member 632 is stretched to release the stress, the force application member 632 drives the unlocking block 631 to rise together, and the pushing portion 633 of the unlocking block 631 and one end of the limit rod 61 are lifted. When the limit rod 61 is lifted to a certain height, the sliding column 533 gets rid of the constraint of the limit rod 61, the elastic body 54 is released, and the guide sleeve 53 and the valve rod 2 are pushed to move downwards until the valve core 3 is in sealing fit with the valve port 4.
In the emergency state, the lock release mechanism 63 is allowed to act by the holding mechanism 64 to automatically unlock the stopper rod 61; the lock lever 61 may be directly acted on to actuate the lock lever 61 to open and close the valve, without activating the unlocking mechanism 63 and the holding mechanism 64.
According to the emergency cut-off valve, under an emergency condition, the valve can be in a closed state through melting of fusible alloy and remote line control of the limiting rod, so that people can obtain more escape time, and life and property safety is protected. And the valve is additionally provided with multiple protective designs, so that the damage to internal parts caused by sudden closing of the valve is reduced as much as possible, the valve can be reused, and the cost is saved.
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Any modifications, equivalent variations and modifications of the above embodiments according to the technical substance of the present invention fall within the scope of protection defined by the claims.
Claims (14)
1. An emergency shut-off valve comprising a valve seat, a valve stem and a valve core, wherein the valve core is fixed at the end part of the valve stem, the valve seat is provided with a valve port matched with the valve core, and the emergency shut-off valve is characterized by further comprising:
the elastic component is arranged on the valve rod and has elastic force for enabling the valve core to move towards the valve port;
the limiting component is matched with the elastic component and can be switched between two states of limiting the elastic component and releasing the elastic component; when the limiting component limits the elastic component, a gap is kept between the valve core and the valve port; when the limiting component releases the elastic component, the valve core is in sealing fit with the valve port;
the elastic assembly comprises a supporting sleeve and a guide sleeve, the supporting sleeve is relatively fixed with the valve seat, the guide sleeve is relatively fixed with the valve rod, the guide sleeve is elastically connected with the supporting sleeve, the supporting sleeve is provided with a sliding groove, and the guide sleeve is provided with a sliding column which is positioned in the sliding groove and can slide along the sliding groove;
The limiting assembly comprises a limiting rod, and the limiting rod can be switched between two states of propping against or being far away from the sliding column; when the limiting rod is propped against the sliding column, the sliding column is positioned at one end of the sliding groove far away from the valve core, so that a gap is kept between the valve core and the valve port; when the limiting rod is far away from the sliding column, the sliding column slides towards one end of the sliding groove, which is close to the valve core, until the valve core is in sealing fit with the valve port;
The limiting assembly further comprises a supporting frame, the supporting frame is fixed with the valve seat relatively, the limiting rod is pivoted on the supporting frame, and one end of the limiting rod is provided with a limiting lug; in the rotation process of the limiting rod, the limiting lug can prop against the sliding column;
The spacing assembly further includes:
the unlocking mechanism comprises an unlocking block and a force application piece, wherein the unlocking block is provided with a pushing part, and the force application piece can apply pushing force to the unlocking block;
The retaining mechanism comprises a baffle and a stop block, the baffle is relatively fixed with the supporting frame, the stop block is arranged between the baffle and the unlocking block, the force application piece is positioned at one end of the unlocking block, which is far away from the stop block, one end of the limiting rod, which is provided with the limiting lug, is positioned at one side of the pushing part of the unlocking block, which faces the stop block, and the stop block can move or deform to enable a gap to be generated between the baffle and the unlocking block.
2. The emergency shutdown valve of claim 1, wherein the resilient assembly further comprises a valve cover and an elastomer;
one end of the valve rod, which is far away from the valve core, extends into the supporting sleeve;
the valve cover is covered on the end surface of the support sleeve, which is far away from the valve rod;
The guide sleeve is positioned in the support sleeve, and the guide sleeve is fixed with the end part of the valve rod positioned in the support sleeve; the guide sleeve is matched with the limiting assembly, and the limiting assembly can be switched between two states of limiting the guide sleeve and releasing the guide sleeve;
the elastic body is positioned in the supporting sleeve, and two ends of the elastic body are respectively propped against the valve cover and the guide sleeve.
3. The slam shut valve of claim 2 wherein: the valve rod and the support sleeve are coaxially arranged, the outer circumferential surface of the guide sleeve is matched with the inner circumferential surface of the support sleeve, and the guide sleeve can slide along the axial direction of the support sleeve.
4. A slam shut valve according to claim 3, characterized in that: and a sealing ring which is arranged around the circumference is arranged between the guide sleeve and the supporting sleeve.
5. The slam shut valve of claim 2 wherein: the elastic body is a compression spring, the surface of the valve cover facing the compression spring forms a convex first positioning bulge, the surface of the guide sleeve facing the compression spring forms a convex second positioning bulge, and two ends of the compression spring are respectively sleeved on the first positioning bulge and the second positioning bulge.
6. The slam shut valve of claim 2 wherein: the elastic body is a compression spring, a positioning hole is formed in the surface, facing the compression spring, of the guide sleeve, the compression spring stretches into the positioning hole, and the positioning hole and the valve rod are coaxially arranged.
7. The slam shut valve of claim 5 wherein: the surface of the guide sleeve facing the compression spring forms a positioning hole, the compression spring stretches into the positioning hole, and the positioning hole and the valve rod are coaxially arranged.
8. The slam shut valve of claim 2 wherein: the elastic component still includes the magnetic part, the magnetic part set up in the one side that the elastomer was kept away from to the uide bushing, the uide bushing has magnetism towards the one end of magnetic part, the uide bushing with have the suction force between the magnetic part.
9. The slam-shut valve of claim 2 wherein the valve cover comprises:
The cover main body is fixedly connected with the end face of the supporting sleeve;
The movable end plate is positioned in the supporting sleeve, and the elastic body is propped against the movable end plate;
The adjusting rod is used for connecting the movable end plate with the cover main body and can adjust the distance between the movable end plate and the cover main body.
10. The slam shut valve of claim 1 wherein: the guide sleeve is positioned in the support sleeve, the sliding chute is arranged around the circumference of the support sleeve, and the sliding column is arranged on the outer circumferential surface of the guide sleeve.
11. The slam shut valve of claim 10 wherein: the periphery of the guide sleeve is provided with a concave area, and the concave area is provided with a sliding edge parallel to the extending direction of the sliding groove; the inner peripheral surface of the support sleeve is provided with a support column, and the end part of the support column is matched with the sliding edge of the concave area and slides relatively.
12. The slam shut valve of claim 11 wherein: the elastic component still includes the ball, the tip of support column forms the shrinkage pool, the ball is placed in the shrinkage pool, the ball with the sliding edge in recessed area contacts.
13. The slam shut valve of claim 1 wherein: the limiting rod rotates to a horizontal position, and the limiting lug abuts against the sliding column; one end of the limiting rod, provided with the limiting protruding block, is placed above the pushing part of the unlocking block, the force application part is located below the unlocking block, and the stop block is located above the unlocking block.
14. The slam shut valve of claim 1 or 13, wherein: the stop is made of fusible alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910745257.2A CN110332348B (en) | 2019-08-13 | 2019-08-13 | Emergency cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910745257.2A CN110332348B (en) | 2019-08-13 | 2019-08-13 | Emergency cut-off valve |
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| Publication Number | Publication Date |
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| CN110332348A CN110332348A (en) | 2019-10-15 |
| CN110332348B true CN110332348B (en) | 2024-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910745257.2A Active CN110332348B (en) | 2019-08-13 | 2019-08-13 | Emergency cut-off valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114458772A (en) * | 2022-01-27 | 2022-05-10 | 国网宁夏电力有限公司电力科学研究院 | Gas circuit switch control module and gas density monitoring device adopting same |
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|---|---|---|---|---|
| CN204127447U (en) * | 2014-09-29 | 2015-01-28 | 保一集团有限公司 | A kind of adjustable Emergeny Cutoff Valves |
| CN210461832U (en) * | 2019-08-13 | 2020-05-05 | 雷舸流体科技（上海）有限公司 | Emergency cut-off valve |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201190824Y (en) * | 2008-04-29 | 2009-02-04 | 济南铭迪机械制造有限公司 | Gas emergency cut-off valve |
| RU82286U1 (en) * | 2008-09-25 | 2009-04-20 | Закрытое акционерное общество Производственная компания "Промконтроллер" | ELECTROMECHANICAL SWITCH-OFF VALVE |
| CN103016754B (en) * | 2012-12-28 | 2015-03-11 | 奥士奥控制阀门(上海)有限公司 | Pneumatic high pressure regulating valve |
| CN103920219B (en) * | 2013-01-10 | 2016-12-28 | 北京谊安医疗系统股份有限公司 | Gas selection valve assembly |
| CN203477546U (en) * | 2013-09-25 | 2014-03-12 | 浙江合飞阀门有限公司 | Gas emergency cut-off valve |
| CN204062072U (en) * | 2014-07-29 | 2014-12-31 | 四川弗瑞希燃气设备有限公司 | Low temperature Emergeny Cutoff Valves open in usual |
| CN108930798B (en) * | 2018-06-26 | 2019-05-03 | 江苏圣泰阀门有限公司 | Totally-enclosed high-voltage safety valve |
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2019
- 2019-08-13 CN CN201910745257.2A patent/CN110332348B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204127447U (en) * | 2014-09-29 | 2015-01-28 | 保一集团有限公司 | A kind of adjustable Emergeny Cutoff Valves |
| CN210461832U (en) * | 2019-08-13 | 2020-05-05 | 雷舸流体科技（上海）有限公司 | Emergency cut-off valve |
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