CN112594422A - Axial flow type check valve - Google Patents
Axial flow type check valve Download PDFInfo
- Publication number
- CN112594422A CN112594422A CN202011601402.9A CN202011601402A CN112594422A CN 112594422 A CN112594422 A CN 112594422A CN 202011601402 A CN202011601402 A CN 202011601402A CN 112594422 A CN112594422 A CN 112594422A
- Authority
- CN
- China
- Prior art keywords
- valve
- locking
- tension spring
- valve body
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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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
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
- F16K35/027—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by pushing or pulling the valve actuator, the valve actuator being rotated subsequently to bring the valve closure element in the desired position
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Abstract
The invention relates to an axial flow check valve which comprises a valve body, a valve core, a plurality of locking assemblies, a buffer tension spring and a plurality of lock rods, wherein the valve core is arranged on the valve body; a valve cavity is arranged in the valve body, an inlet pipe communicated with the valve cavity is arranged on the right side of the valve body, and an outlet pipe communicated with the valve cavity is arranged on the left side of the valve body; the left part of the valve cavity is horizontally provided with a first installation cavity communicated with the outlet pipe, the valve core is connected in the first installation cavity in a sliding way through a flat key, and the right side of the valve core is provided with a valve clack; one end of the buffer tension spring is fixedly connected to the valve body, the other end of the buffer tension spring is fixedly connected to the valve core, and the buffer tension spring forces the valve core to move leftwards; the valve clack is provided with a plurality of lock rods along the circumferential direction, and the axis of each lock rod is vertical to the axis of the valve clack; in the valve body, the right side of each lock rod is provided with a corresponding second installation cavity, and the left side of each second installation cavity is provided with a locking assembly; the buffering component is arranged in the valve body, so that water hammer can be prevented, impact is reduced, and the service life of the valve clack is prolonged; when the valve clack is completely closed, the valve clack is completely locked by the locking assemblies, the sealing of the valve clack is not affected, and the valve clack can be reliably closed and sealed.
Description
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to an axial-flow check valve.
Background
The axial flow type check valve has the characteristics of strong flow capacity, small flow resistance, no blockage in opening and closing, reliable sealing and the like, thereby being favored by engineering design. The axial flow check valves can be classified into a disc type and a disk type according to the structural form of the valve core. The working principle of the axial flow type check valve is as follows: the opening and closing of the flap is determined by the pressure difference between the inlet and outlet ends of the valve. When the pressure at the inlet end is greater than the sum of the pressure at the outlet end and the spring force, the valve flap opens. The following problems often appear in the use of current axial-flow check valve: in the closing process of the valve clack, the too high closing speed can cause the too large impact force of the sealing surface of the valve clack to the sealing surface of the valve seat, so that the sealing surface is easy to damage, the check valve cannot be effectively stopped, and the service life is reduced; meanwhile, when the check valve clack is closed quickly, water hammer is easy to generate, and the valve is damaged.
Disclosure of Invention
The invention aims to provide an axial flow type check valve which is simple in structure, can be closed slowly and can prevent water hammer.
In order to achieve the purpose, the invention provides the following technical scheme, which comprises a valve body, a valve core, a plurality of locking assemblies, a buffer tension spring and a plurality of lock rods; a valve cavity is arranged in the valve body, an inlet pipe communicated with the valve cavity is arranged on the right side of the valve body, and an outlet pipe communicated with the valve cavity is arranged on the left side of the valve body; the left part of the valve cavity is horizontally provided with a first installation cavity communicated with the outlet pipe, the valve core is connected in the first installation cavity in a sliding way through a flat key, and the right side of the valve core is provided with a valve clack; one end of the buffer tension spring is fixedly connected to the valve body, the other end of the buffer tension spring is fixedly connected to the valve core, and the buffer tension spring forces the valve core to move leftwards; the valve clack is provided with a plurality of lock rods along the circumferential direction, and the axis of each lock rod is vertical to the axis of the valve clack; in the valve body, the right side of each lock rod is provided with a corresponding second installation cavity, and the left side of each second installation cavity is provided with a locking assembly;
when liquid is introduced into the inlet pipe, the locking assembly is unlocked, the valve clack is pushed to move leftwards by the pressure in the inlet pipe, and the inlet pipe is completely opened; when the inlet pipe stops introducing liquid, the pressure in the outlet pipe pushes the valve clack to drive the buffer tension spring to move rightwards, and the closing speed of the valve clack is slowed down through the buffer tension spring; when the valve clack closes the inlet pipe completely, the locking assembly is buckled with the locking rod to lock the valve clack at a closing position.
Preferably, the locking assembly comprises a locking piston, a locking block, a rotating shaft, a tension spring and a fixed seat; the fixed seat is fixedly connected in the valve body, the rotating shaft is fixedly connected on the fixed seat, the axis of the rotating shaft is parallel to the locking rod, the locking block is rotatably connected on the rotating shaft, and the left end part of the locking block can be matched with the locking rod to complete self-locking; the locking piston is connected in the second mounting cavity in a sliding mode, and a locking piston rod is arranged in the locking piston in a leftward extending mode; one end of the tension spring is fixedly connected to the fixed seat, the other end of the tension spring is fixedly connected to the locking block, and the tension spring forces the locking block to rotate outwards; and a left cavity communicated with the inlet pipe is formed between the second mounting cavity and the left end of the locking piston, and a right cavity communicated with the outlet pipe is formed between the second mounting cavity and the right end of the locking piston.
Preferably, the right end of the locking piece is provided with a rotation stopping groove, the left end of the locking piece is provided with a locking groove matched with the locking rod, when the locking piston rod extends into the rotation stopping groove, the locking piece cannot rotate outwards the valve body, the locking rod is prevented from being disengaged from the locking groove, the lower part of the locking groove is provided with a driving part, and the locking rod pushes the driving part to enable the locking piece to rotate by taking the rotating shaft as an axis.
As the preferred, when letting in liquid in the inlet pipe, the locking piston moves right under left cavity hydraulic action, and the locking piston rod withdraws from the spline inslot, makes the locking piece can rotate, acts on between locking lever and locking piece through the extension spring, makes the locking piece uses the pivot to rotate outward to the valve body as the axle center, makes locking lever and lockgroove no longer lock, and import intraductal pressure promotes the valve clack and moves left, makes axial-flow check valve opens completely.
Preferably, when the liquid is stopped to be introduced into the inlet pipe, the pressure in the outlet pipe pushes the valve clack to move rightwards by overcoming the tension of the buffer tension spring, and when the valve clack moves rightwards to the position where the lock rod is contacted with the driving part, the lock rod pushes the lock block to rotate inwards the valve body; when hydraulic pressure promotes the valve clack and moves the complete closure import pipe right, the locking piece is rotatory to locking piston rod and the relative position of groove that splines, and locking piston rod stretches into the groove that splines left under right cavity hydraulic pressure effect, makes the locking piece can't rotate, and the locking lever is located the locked groove completely, the locking piece is with valve clack locking completely.
Compared with the prior art, the invention has the advantages that:
the invention is provided with the buffer tension spring which plays a role of resistance buffer for the closing of the valve clack when the valve clack is from an opening position to a closing position, thereby preventing water hammer, reducing impact and prolonging the service life of the valve clack; when the valve clack is completely closed, the valve clack is completely locked by the locking assemblies, the sealing of the valve clack is not affected, and the valve clack can be reliably closed and sealed.
Drawings
FIG. 1 is a schematic view of the present invention in the open position;
fig. 2 is a schematic structural view of the present invention in the closed position.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1-2, is a preferred embodiment of the present invention.
An axial flow type check valve comprises a valve body 1, a valve core 2, a plurality of locking assemblies 3, a buffer tension spring 4 and a plurality of lock rods 5; a valve cavity 15 is arranged in the valve body 1, an inlet pipe 13 communicated with the valve cavity 15 is arranged on the right side of the valve body 1, and an outlet pipe 14 communicated with the valve cavity 15 is arranged on the left side of the valve body 1; the left part of the valve cavity 15 is horizontally provided with a first installation cavity 11 communicated with the outlet pipe 14, the valve core 2 is connected in the first installation cavity 11 in a sliding way through a flat key 22, and the right side of the valve core 2 is provided with a valve clack 21; one end of the buffer tension spring 4 is fixedly connected to the valve body 1, the other end of the buffer tension spring is fixedly connected to the valve core 2, and the buffer tension spring 4 forces the valve core 2 to move leftwards; the valve clack 21 is provided with a plurality of lock rods 5 along the circumferential direction, and the axis of each lock rod 5 is vertical to the axis of the valve clack 21; in the valve body 1, every locking lever 5 right side all is equipped with its second installation cavity 12 that corresponds, and every second installation cavity 12 left side all is equipped with locking subassembly 3.
When the inlet pipe 13 is filled with liquid, the locking assembly 3 is unlocked, the pressure in the inlet pipe 13 pushes the valve clack 21 to move leftwards, and the inlet pipe 13 is completely opened; when the inlet pipe 13 stops introducing liquid, the pressure in the outlet pipe 14 pushes the valve flap 21 to drive the buffer tension spring 4 to move rightwards, and the closing speed of the valve flap 2 is reduced through the buffer tension spring 4; when the valve flap 21 completely closes the inlet pipe 13, the locking assembly 3 is snapped with the locking lever 5 to lock the valve flap 21 in the closed position.
The locking assembly 3 comprises a locking piston 31, a locking block 32, a rotating shaft 33, a tension spring 34 and a fixed seat 35; the fixed seat 35 is fixedly connected in the valve body 1, the rotating shaft 33 is fixedly connected on the fixed seat 35, the axis of the rotating shaft 33 is parallel to the locking rod 5, the locking block 32 is rotatably connected on the rotating shaft 33, and the left end part of the locking block 32 can be matched with the locking rod 5 to complete self-locking; the locking piston 31 is connected in the second mounting cavity 12 in a sliding manner, and a locking piston rod 311 extends leftwards from the locking piston 31; one end of the tension spring 34 is fixedly connected to the fixed seat 35, the other end of the tension spring is fixedly connected to the locking block 32, and the tension spring 34 forces the locking block 61 to rotate towards the outside of the valve body 1; a left chamber communicated with the inlet pipe 13 is formed between the second mounting chamber 12 and the left end of the locking piston 31, and a right chamber communicated with the outlet pipe 14 is formed between the second mounting chamber 12 and the right end of the locking piston 31.
The right end of the locking piece 32 is provided with a rotation stopping groove 321, the left end of the locking piece 32 is provided with a locking groove 322 matched with the locking rod 5, when the locking piston rod 311 extends into the rotation stopping groove 321, the locking piece 32 cannot rotate towards the outside of the valve body 1, the locking rod 5 is prevented from being separated from the locking groove 322, the lower part of the locking groove 322 is provided with a driving part 323, and the locking rod 5 pushes the driving part 323 to enable the locking piece 32 to rotate by taking the rotating shaft 33 as an axis.
When letting in liquid in the import pipe 13, locking piston 31 moves right under left cavity hydraulic pressure effect, and locking piston rod 311 withdraws from the groove 321 that splines, makes locking piece 32 can rotate, acts on between locking lever 5 and locking piece 32 through extension spring 34, makes locking piece 32 uses pivot 33 to rotate outward to valve body 1 as the axle center, makes locking lever 5 and locking groove 322 no longer lock, and import pipe 13 internal pressure promotes valve clack 21 and moves left, makes axial-flow type check valve opens completely.
When the liquid stops flowing into the inlet pipe 13, the pressure in the outlet pipe 14 pushes the valve clack 21 to move rightwards against the pulling force of the buffer tension spring 4, so that the closing speed of the valve clack 21 is reduced, and when the valve clack 21 moves rightwards to the position where the lock rod 5 is contacted with the driving part 323, the lock rod 5 pushes the lock block 32 to rotate towards the valve body 1; when the valve clack 21 is pushed by hydraulic pressure to move rightwards to completely close the inlet pipe 13, the locking block 32 rotates to the relative position of the locking piston rod 311 and the rotation stopping groove 321, the locking piston rod 311 extends leftwards into the rotation stopping groove 321 under the hydraulic action of a right chamber, the locking block 32 cannot rotate, the locking rod 5 is completely positioned in the locking groove 322, and the valve clack 21 is completely locked by the locking block 32.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An axial flow check valve characterized by: the axial flow type check valve comprises a valve body (1), a valve core (2), a plurality of locking assemblies (3), a buffer tension spring (4) and a plurality of lock rods (5); a valve cavity (15) is arranged in the valve body (1), an inlet pipe (13) communicated with the valve cavity (15) is arranged on the right side of the valve body (1), and an outlet pipe (14) communicated with the valve cavity (15) is arranged on the left side of the valve body (1); a first installation cavity (11) communicated with the outlet pipe (14) is horizontally arranged at the left part of the valve cavity (15), the valve core (2) is connected in the first installation cavity (11) in a sliding manner through a flat key (22), and a valve clack (21) is arranged at the right side of the valve core (2); one end of the buffer tension spring (4) is fixedly connected to the valve body (1), the other end of the buffer tension spring is fixedly connected to the valve core (2), and the buffer tension spring (4) forces the valve core (2) to move leftwards; the valve clack (21) is provided with a plurality of lock rods (5) along the circumferential direction, and the axis of each lock rod (5) is vertical to the axis of the valve clack (21); in the valve body (1), the right side of each lock rod (5) is provided with a corresponding second mounting cavity (12), and the left side of each second mounting cavity (12) is provided with a locking assembly (3);
when liquid is introduced into the inlet pipe (13), the locking assembly (3) is unlocked, the pressure in the inlet pipe (13) pushes the valve clack (21) to move leftwards, and the inlet pipe (13) is completely opened; when the inlet pipe (13) stops introducing liquid, the pressure in the outlet pipe (14) pushes the valve flap (21) to drive the buffer tension spring (4) to move rightwards, and the closing speed of the valve flap (2) is slowed down through the buffer tension spring (4); when the valve clack (21) completely closes the inlet pipe (13), the locking assembly (3) is buckled with the locking rod (5) to lock the valve clack (21) at a closing position.
2. The axial flow check valve of claim 1, wherein: the locking assembly (3) comprises a locking piston (31), a locking block (32), a rotating shaft (33), a tension spring (34) and a fixed seat (35); the fixed seat (35) is fixedly connected in the valve body (1), the rotating shaft (33) is fixedly connected on the fixed seat (35), the axis of the rotating shaft (33) is parallel to the locking rod (5), the locking block (32) is rotatably connected on the rotating shaft (33), and the left end part of the locking block (32) can be matched with the locking rod (5) to complete self-locking; the locking piston (31) is connected in the second mounting cavity (12) in a sliding manner, and a locking piston rod (311) extends leftwards from the locking piston (31); one end of the tension spring (34) is fixedly connected to the fixed seat (35), the other end of the tension spring is fixedly connected to the locking block (32), and the tension spring (34) forces the locking block (61) to rotate outwards the valve body (1); a left chamber communicated with the inlet pipe (13) is formed between the second mounting cavity (12) and the left end of the locking piston (31), and a right chamber communicated with the outlet pipe (14) is formed between the second mounting cavity (12) and the right end of the locking piston (31).
3. The axial flow check valve of claim 2, wherein: locking piece (32) right-hand member is equipped with only groove (321), locking piece (32) left end be equipped with locking lever (5) complex locked groove (322), when locking piston rod (311) stretched into only groove (321) in, locking piece (32) can not be rotatory outward to valve body (1), prevent that locking lever (5) from deviating from in locked groove (322), the lower part of locked groove (322) is equipped with drive division (323), locking lever (5) promote drive division (323) can make locking piece (32) use pivot (33) to be rotatory as the axle center.
4. The axial flow type check valve of claim 3, wherein when liquid is introduced into the inlet pipe (13), the locking piston (31) moves rightwards under the hydraulic action of the left chamber, the locking piston rod (311) retracts from the rotation stopping groove (321), so that the locking block (32) can rotate, the tension spring (34) acts between the locking rod (5) and the locking block (32), the locking block (32) rotates outwards to the valve body (1) by taking the rotating shaft (33) as an axis, the locking rod (5) and the locking groove (322) are not buckled any more, and the pressure in the inlet pipe (13) pushes the valve flap (21) to move leftwards, so that the axial flow type check valve is completely opened.
5. The axial flow type check valve of claim 3, characterized in that when the liquid stops flowing into the inlet pipe (13), the pressure in the outlet pipe (14) pushes the valve flap (21) to move to the right against the pulling force of the buffer tension spring (4), when the valve flap (21) moves to the right to the position where the lock rod (5) and the driving part (323) touch, the lock rod (5) pushes the lock block (32) to rotate to the valve body (1); when hydraulic pressure promotes valve clack (21) and moves when closing inlet pipe (13) completely to the right, locking piece (32) are rotatory to locking piston rod (311) and standstill groove (321) relative position, and locking piston rod (311) are stretched into in standstill groove (321) under the effect of right chamber hydraulic pressure left, make locking piece (32) can't rotate, and locking lever (5) are located locking groove (322) completely, locking piece (32) are with valve clack (21) complete locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011601402.9A CN112594422A (en) | 2020-12-29 | 2020-12-29 | Axial flow type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011601402.9A CN112594422A (en) | 2020-12-29 | 2020-12-29 | Axial flow type check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112594422A true CN112594422A (en) | 2021-04-02 |
Family
ID=75203866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011601402.9A Withdrawn CN112594422A (en) | 2020-12-29 | 2020-12-29 | Axial flow type check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112594422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202957A (en) * | 2021-05-17 | 2021-08-03 | 师海荣 | Axial flow type check valve |
| WO2024013502A1 (en) * | 2022-07-14 | 2024-01-18 | Site and Field Services Limited | Valve assembly |
-
2020
- 2020-12-29 CN CN202011601402.9A patent/CN112594422A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202957A (en) * | 2021-05-17 | 2021-08-03 | 师海荣 | Axial flow type check valve |
| WO2024013502A1 (en) * | 2022-07-14 | 2024-01-18 | Site and Field Services Limited | Valve assembly |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210402 |
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| WW01 | Invention patent application withdrawn after publication |