CN221097573U - Check valve - Google Patents
Check valve Download PDFInfo
- Publication number
- CN221097573U CN221097573U CN202322889006.6U CN202322889006U CN221097573U CN 221097573 U CN221097573 U CN 221097573U CN 202322889006 U CN202322889006 U CN 202322889006U CN 221097573 U CN221097573 U CN 221097573U
- Authority
- CN
- China
- Prior art keywords
- valve
- flange
- air
- check
- cover
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000009423 ventilation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Landscapes
- Check Valves (AREA)
Abstract
The utility model belongs to the technical field of check valves, and discloses a check valve which comprises a valve body, wherein a valve cover is connected to the valve body, the valve body further comprises a first inlet and a first outlet, a medium flow passage is formed between the first inlet and the first outlet, a valve clack is arranged in the medium flow passage, an air valve and a pressure relief valve are connected to the valve cover, and the air valve and the pressure relief valve are respectively communicated with a medium passage between the valve clack and the first outlet. The utility model integrates the positive and negative pressure water hammer protection function and the ventilation function on the check valve body, has compact structure and better protection effect.
Description
Technical Field
The utility model belongs to the technical field of check valves, and particularly relates to a check valve.
Background
The check valve is often installed at the water pump downstream, as the important valve of backstop and protection water pump, after stopping the pump and closing the valve, the transient negative pressure probably appears behind the check valve and produces the higher positive water hammer of peak value, but general check valve lacks the safeguard measure that can restrain positive negative pressure and water hammer, even if the additional safeguard measure, also is the additional measure, and the additional measure often has the problem that is far away from the check valve, is difficult to in time restrain water hammer and set up with higher costs, still can influence piping system safety.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model aims to provide a check valve, which mainly solves the problems that positive and negative pressure and water hammer appear when a conventional check valve stops pumping and closes, and the safety of a pipeline system is affected.
In order to achieve the above purpose, the utility model provides a check valve, which comprises a valve body, wherein a valve cover is connected to the valve body, the valve body further comprises a first inlet and a first outlet, a medium flow passage is formed between the first inlet and the first outlet, a valve clack is arranged in the medium flow passage, an air valve and a pressure relief valve are connected to the valve cover, and the air valve and the pressure relief valve are respectively communicated with a medium passage between the valve clack and the first outlet.
Further, the check valve is a rubber flap check valve or a swing check valve.
Further, the pressure release valve is a water hammer release valve.
Furthermore, the air valve, the pressure relief valve and the valve cover are detachably connected through a connecting structure.
Still further, connection structure includes the flange, air valve and valve gap pass through flange and bolt fixed connection, relief valve and valve gap pass through flange and bolt fixed connection.
Further, the connecting structure comprises two stop valves, one stop valve is fixedly connected between the air valve and the valve cover through the flange and the bolt, and the other stop valve is fixedly connected between the pressure release valve and the valve cover through the flange and the bolt.
Further, the stop valve is any one of a gate valve, a butterfly valve, a ball valve and a half ball valve.
Further, the three-way valve further comprises a cut-off valve, the connecting structure comprises a flange and a three-way pipe, the three-way pipe is a Y-shaped pipe, the cut-off valve is fixedly connected between the first port of the three-way pipe and the valve cover through the flange and bolts, the second port of the three-way pipe is fixedly connected with an air valve through the flange and bolts, and the third port of the three-way pipe is fixedly connected with a pressure release valve through the flange and bolts.
Further, the stop valve is any one of a gate valve, a butterfly valve, a ball valve and a half ball valve.
Compared with the prior art, the technical scheme of the utility model mainly has the following advantages:
The utility model integrates the pressure relief valve and the air valve on the valve cover of the check valve, the position is nearest to the water pump and the installation space is most suitable, the problem that a larger pump room space is required for distributed arrangement of the pressure relief air supplementing device on the waterway where the check valve is positioned is solved by providing the complete set of valve groups, and the ventilation condition of the inner pipe section of the pump station is timely improved and the problem of overpressure protection possibly encountered by a pipeline system is solved by arranging the air valve and the pressure relief valve on the check valve nearby.
Drawings
FIG. 1 is a schematic view of a check valve according to the present utility model ;
FIG. 2 is a schematic diagram of a check valve with a shut-off valve according to the present utility model ;
FIG. 3 is a schematic view of a check valve with a gate valve with a Y-shaped pipe as a connecting structure .
In the figure: 1-valve body, 11-first import, 12-second import, 2-air valve, 3-relief valve, 4-valve gap, 5-valve clack, 6-Y venturi tube, 7-gate valve.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, the check valve provided in this embodiment includes a valve body 1, a valve cover 4 is connected to the valve body 1, the valve body 1 further includes a first inlet 11 and a first outlet 12, a medium flow channel is formed between the first inlet 11 and the first outlet 12, and the air valve and the pressure relief valve are arranged in a side-by-side or dislocation manner in a middle position of the valve cover 4. The air valve in this embodiment mainly has the following functions: 1. the negative pressure of the pipeline is eliminated by rapid air suction when the pipeline is in negative pressure, but the pipeline cannot be fundamentally prevented from generating negative pressure; 2. exhausting air when the pipeline is positive in pressure so as to cut down a positive pressure water hammer; 3. the pipeline can be slightly exhausted when accumulating gas. And negative pressure or positive pressure is not necessarily generated after the pump is stopped and the valve is closed; in this embodiment, the pressure release valve is opened to release the water when the positive pressure of the pipeline arrives (higher than the preset pressure).
In this embodiment, the check valve is a rubber flap check valve or a swing check valve, or any other check valve having a sufficient installation space.
In this embodiment, the pressure release valve is a water hammer release valve, or any pressure release valve capable of realizing a pressure release function.
In this embodiment, the air valve 2 and the valve cover 4, and the pressure release valve 3 and the valve cover 4 are detachably connected through a connection structure.
In this embodiment, the detachable connection structure is a tee and/or flange, and other connection members that enable the air valve and the pressure relief valve to be mounted on the valve cover.
In this embodiment, the three-way pipe is a Y-shaped pipe, and only one connecting hole is formed in the valve cover 4.
In this embodiment, a stop valve may be further disposed between the connection structure and the valve cover 4, as shown in fig. 2, where the stop valve includes two connection structures, and the connection structure is a flange, one of the stop valves is fixedly connected between the air valve 2 and the valve cover 4 through the flange and the bolt, and the other stop valve is fixedly connected between the pressure release valve 3 and the valve cover 4 through the flange and the bolt.
In this embodiment, the flanges are flanges or flange pipes, and if the flanges are flanges, the flanges are welded and fixed at the assembling ends of the valve cover 4 and the air valve and the assembling ends of the valve cover 4 and the pressure relief valve respectively, and the flanges are fixedly connected through bolts.
In this embodiment, if the flange is a flange pipe, the assembly end of the flange and the assembly ends of the air valve 2 and the pressure release valve 3 may be fixedly connected by bolts.
In the embodiment, the positive and negative pressure water hammer protection equipment (pressure relief valve) and the ventilation equipment (air valve) are integrated on a check valve cover, so that the protection effect is good, the installation space is saved, and the maintenance is convenient.
The working principle of the check valve provided by the embodiment is as follows: when the check valve is used, a pipeline is externally connected to the first inlet 11 and the first outlet 12, then a fluid medium is introduced into the first inlet 11, and after the fluid medium enters a fluid channel, the rubber valve clack 5 in the valve body is propped open so as to lead the valve to be conducted; after the pump is stopped and the valve is closed, the first pump stopping pressure reducing wave can generate transient negative pressure after the check valve; the water hammer resistant air valve 2 on the top cover of the check valve is used for sucking and supplementing air nearly quickly to break vacuum, the first pressure reducing wave is reflected into positive pressure wave, and when the pressure reducing wave returns, a positive water hammer with a higher peak value can be generated behind the check valve, and the water hammer on the valve cover of the check valve can be used for quickly discharging water and reducing pressure, so that the peak value of the positive water hammer is reduced, the air valve can throttle and exhaust at the moment, and the water hammer is prevented from being closed by a water column; the valve closing and starting stage or the small flow operation stage is operated, if the pressure behind the pump is ultrahigh, the pressure relief valve on the check valve cover positioned in front of the operation valve can drain water and reduce pressure, so that the problem of overpressure caused by long-time valve closing operation or small flow operation of the centrifugal pump is prevented; the air valve on the stop return valve cover of the embodiment has 4 functions: when the positive pressure wave arrives, the air valve exhausts a large amount to inhibit the positive pressure water hammer; when positive pressure water column is filled, throttling and exhausting are carried out, so that a filled water hammer is restrained; when the pipeline system normally runs and accumulates air, a trace amount of air is exhausted; when the pipeline is under negative pressure, a large amount of air is quickly sucked, the vacuum is broken, and all ventilation function requirements required during the operation of the pipeline can be met.
As shown in fig. 3, the check valve provided in this embodiment is provided with a stop valve between the valve cover 4 and the relief valve 3 as well as the air valve 2, the stop valve is connected with the relief valve 3 and the air valve 2 through the detachable connection structure, the connection structure comprises a flange and a three-way pipe, the three-way pipe is a Y-shaped pipe 6, the stop valve is fixedly connected between the first port of the three-way pipe and the valve cover through the flange and the bolt, the second port of the three-way pipe is fixedly connected with the air valve 2 through the flange and the bolt, and the third port of the three-way pipe is fixedly connected with the relief valve 3 through the flange and the bolt.
Specifically, in fig. 3, only 1 through hole is formed in the valve cover 4, the stop valve is selected as a gate valve 7, the interface at the lower end of the gate valve 7 is connected with the through hole in the valve cover 4 through a flange, and the interface at the upper end of the gate valve is connected with the Y-shaped pipe 6 through a flange. The two connection ports at the upper end of the Y-shaped pipe 6 are respectively connected with the pressure release valve 3 and the air valve 2 through flanges. The medium channel between the valve clack 5 and the valve cover 4 can be communicated with the gate valve 7, and the gate valve 7 can be communicated with the air valve 2 and the pressure relief valve 3 through the Y pipe, so that the water leakage and pressure release functions in the embodiment 1 are realized, and meanwhile, the embodiment can also be used for overhauling and maintaining the air valve 2 and the pressure relief valve 3 by closing the gate valve 7.
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise specifically defined.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (9)
1. The check valve is characterized by comprising a valve body (1), wherein a valve cover (4) is connected to the valve body (1), the valve body (1) further comprises a first inlet (11) and a first outlet (12), a medium flow channel is formed between the first inlet (11) and the first outlet (12), a valve clack is arranged in the medium flow channel, an air valve (2) and a pressure relief valve (3) are connected to the valve cover (4), and the air valve (2) and the pressure relief valve (3) are respectively communicated with a medium channel between the valve clack and the first outlet (12).
2. A check valve as in claim 1 wherein the check valve is a rubber flap check valve or a swing check valve.
3. A non-return valve according to claim 1, characterized in that the relief valve (3) is a water hammer relief valve.
4. A non-return valve according to any one of claims 1-3, characterized in that the air valve (2), the pressure relief valve (3) and the valve cap (4) are detachably connected by means of a connecting structure.
5. A non-return valve according to claim 4, wherein the connection comprises a flange, the air valve (2) and the valve cap (4) being fixedly connected by means of a flange and a bolt, the pressure relief valve (3) and the valve cap (4) being fixedly connected by means of a flange and a bolt.
6. A non-return valve according to claim 4, further comprising two shut-off valves, wherein the connecting structure comprises a flange, one shut-off valve being fixedly connected between the air valve (2) and the valve cover (4) by means of a flange and a bolt, and the other shut-off valve being fixedly connected between the pressure relief valve (3) and the valve cover (4) by means of a flange and a bolt.
7. The check valve of claim 6, wherein said shut-off valve is any one of a gate valve, a butterfly valve, a ball valve, and a half ball valve.
8. The check valve according to claim 4, further comprising a shut-off valve, wherein the connection structure comprises a flange and a tee pipe, the tee pipe is a Y-pipe, the shut-off valve is fixedly connected between a first port of the tee pipe and the valve cover (4) through the flange and a bolt, a second port of the tee pipe is fixedly connected with the air valve (2) through the flange and the bolt, and a third port of the tee pipe is fixedly connected with the pressure release valve (3) through the flange and the bolt.
9. The check valve of claim 8, wherein said shut-off valve is any one of a gate valve, a butterfly valve, a ball valve, and a half ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322889006.6U CN221097573U (en) | 2023-10-25 | 2023-10-25 | Check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322889006.6U CN221097573U (en) | 2023-10-25 | 2023-10-25 | Check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221097573U true CN221097573U (en) | 2024-06-07 |
Family
ID=91318088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322889006.6U Active CN221097573U (en) | 2023-10-25 | 2023-10-25 | Check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221097573U (en) |
-
2023
- 2023-10-25 CN CN202322889006.6U patent/CN221097573U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN221097573U (en) | Check valve | |
| CN209655043U (en) | A kind of low-pressure fuel gas pipeline minute leakage on-line monitoring system | |
| CN101614292A (en) | Backflow preventer | |
| CN109708004A (en) | A kind of low-pressure fuel gas pipeline minor leakage on-line monitoring system and method | |
| CN221034122U (en) | Check valve capable of automatically relieving pressure | |
| CN221547252U (en) | High-flow diaphragm pump | |
| CN207848492U (en) | A kind of check-valves with the micro- slow keying effect of more flaps | |
| CN209569391U (en) | A kind of Combined type air inlet | |
| CN217482539U (en) | Large-pressure-difference flow guide device for gas burning valve station | |
| CN219263501U (en) | Check valve convenient to assemble and disassemble | |
| CN219453673U (en) | Compressor operation residual medium release transfer equipment | |
| CN217439069U (en) | Complete set of water supply equipment | |
| CN218326424U (en) | Automatic exhaust valve | |
| CN221401813U (en) | Oil way valve block | |
| CN217029006U (en) | Be applied to automatic water diversion device in mine pit | |
| CN218581673U (en) | Steam seal steam exhaust system for realizing online isolation and maintenance of steam seal heater | |
| CN221628947U (en) | Self-closing valve for gas pipeline | |
| CN220186542U (en) | System ammonia adding and vacuum breaking device | |
| CN216079765U (en) | Measures for preventing backup pump from being out of normal operation due to failure of condensate pump negative pressure system | |
| CN213775483U (en) | Closed respirator | |
| CN216689588U (en) | Connecting pipe structure for reducing volume of air tank | |
| CN217997992U (en) | Temporary control device for gas shield dam | |
| CN221703916U (en) | Vacuum pump exhaust port silencer | |
| CN221370630U (en) | Novel oiling machine emergency early warning cut-off protector | |
| CN216576182U (en) | Automatic soldering turret circulating water drainage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |