CN211474968U - Check valve core and check valve - Google Patents
Check valve core and check valve Download PDFInfo
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- CN211474968U CN211474968U CN201921198143.2U CN201921198143U CN211474968U CN 211474968 U CN211474968 U CN 211474968U CN 201921198143 U CN201921198143 U CN 201921198143U CN 211474968 U CN211474968 U CN 211474968U
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- valve
- valve plug
- plug frame
- check valve
- check
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Abstract
The utility model discloses a check valve core and a check valve, wherein the core comprises a valve plug frame and a valve plug sleeved and fixed on the head part of the valve plug frame, the valve plug is provided with an arc-shaped sealing surface and made of an elastomer material, and the tail part of the valve plug frame forms a guide section; the valve plug frame is in a hollow sealing pipe structure; a fluid channel is formed on the outer wall of the pipe body of the guide section, and the outer diameter of the pipe section in the middle of the valve plug frame is smaller than that of the guide section. Preferably, the guide section is formed into a dart tail structure by a plurality of fins, and the space between adjacent fins forms a fluid channel; the valve plug frame is formed by combining a valve plug frame cover and a valve plug frame seat. The check valve comprises a valve core which is arranged in a fluid pipeline of the valve and is moved by a trumpet-shaped valve port and a sliding way, and a valve plug is arranged upwards. The beneficial effects of the utility model are that, case simple structure, processing are convenient, low in manufacturing cost. When used for a ball valve, the ball valve is arranged in the valve cover channel and is suitable for water and toxic and harmful liquid conveying pipelines so as to form reverse quick cut-off by utilizing liquid buoyancy.
Description
Technical Field
The utility model provides a valve structure, in particular to check valve case and check valve.
Background
A check valve, also known as a check valve, is a valve that is disposed on a fluid line to prevent the reverse flow of fluid. The working principle of the check valve is that a valve core is pushed by fluid flowing reversely to move so as to realize channel blocking, and the check valve is usually used for a pressure container or a pipe network to prevent the fluid in the pressure container or in a pipeline at the tail end of the pipe network from flowing reversely so as to overhaul or replace pipe network facilities after the fluid supply is cut off for a pipeline connected with the check valve.
The check ball valve is a combined valve which combines a ball valve and a check valve into a whole and is commonly used on a pipeline, and comprises a ball valve and a check structure arranged in a fluid pipeline of a valve cover of the ball valve. Present non return structure comprises check valve port and case, and check valve port is the horn mouth form, and the horn mouth main aspects is towards fluid forward flow direction, and horn mouth main aspects the place ahead is equipped with the check valve case, and the case includes the valve plug frame and fixes the valve cap on the valve plug frame, and the valve plug frame is the cylindrical structure, and the valve cap is fixed in bobbin base end, is equipped with a plurality of windows that are close to the valve cap on the section of thick bamboo wall of valve plug frame, and the valve cap can form the shutoff to the horn mouth under reverse fluid effect. When fluid flows in the forward direction, the valve cap moves away from the bell mouth under the action of fluid pressure to separate from the bell mouth, and the fluid passes through a gap between the bell mouth and the valve cap, then passes through a space between the valve core and the inner wall of the fluid pipeline of the valve cap, then enters the cylinder from the window on the wall of the valve plug frame and finally flows out of the cylinder opening. Under the condition that no fluid flows into the inlet end of the valve, the valve plug frame pushes the valve plug to plug the horn mouth under the action of the fluid pressure at the outlet end, and the purpose of non-return is achieved. However, the existing check valve core is influenced by the structure of the check valve core, when the pressure of liquid reverse fluid is small, even if the valve core is vertically arranged downwards, the valve can not be turned off as early as possible by utilizing the buoyancy of the liquid, and a part of the liquid inevitably flows out reversely before the valve is turned off. For this reason, further improvement is required.
Disclosure of Invention
The utility model discloses a first purpose provides a check valve case to the slow defect of non return response among the current check valve to when the check valve case is vertical setting, utilize liquid buoyancy to promote the case and form the non return effect, avoid having the liquid that flows through the horn mouth backward before turn-OFF, the specially adapted water to and the relatively great poisonous and harmful type liquid of density or corrosive liquids carry. The utility model discloses a second purpose is based on aforementioned non return case, founds a valve with non return structure to obtain the fast valve of non return response.
In order to achieve the first objective, the present invention adopts the following technical solution.
A check valve core comprises a valve plug frame and a valve plug sleeved and fixed on the head of the valve plug frame, wherein the valve plug is provided with an arc-shaped sealing surface and is made of an elastomer material, and the tail of the valve plug frame forms a guide section; the valve plug frame is of a hollow sealing pipe structure; a fluid channel is formed on the outer wall of the pipe body of the guide section, and the outer diameter of the pipe section in the middle of the valve plug frame is smaller than that of the guide section.
Adopt aforementioned scheme the utility model discloses, when being applied to liquid conveying pipeline, set up the valve plug up, when liquid risees gradually from valve plug frame afterbody, when liquid is greater than its weight to the buoyancy that produces from valve plug frame, the case rises to utilize the valve plug to form the shutoff to the one-way circulation valve port of valve, block liquid reverse flow. This scheme utilizes the hollow sealing tube structure of valve plug frame, makes valve plug frame tail portion form great volume, and corresponding increase buoyancy for tubular structure, and nozzle valve plug frame down, its buoyancy increase is obvious to in-process that the liquid level risees gradually, buoyancy progressively increases, can form the shutoff to the valve port of check valve until the valve plug. When the fluid has certain pressure, the pushing action of the pressure on the valve core further enhances the sealing effect. This case can ensure that the liquid level just can be with the check valve port shutoff before submerging the valve plug, can effectively avoid liquid to flow from the check valve port before shutting off. The switch has the advantages of simple structure, reliable function and quick turn-off response. Wherein, the valve plug is made of butadiene-acrylonitrile rubber or other high polymer elastomer materials; the valve plug frame is made of ABS material so as to effectively reduce the weight of the valve core.
Preferably, the guide section is formed of a plurality of fins forming a dart tail structure, and the space between adjacent fins constitutes the fluid passage. So as to form a fluid channel with a larger cross section and ensure the fluid to be unobstructed in the forward direction.
Preferably, the valve plug frame consists of a valve plug frame cover and a valve plug frame seat, and the valve plug frame cover is in socket connection with the valve plug frame seat; the valve plug fixed connection be in on the valve plug frame lid, the guide section forms on the valve plug frame seat. So as to form a hollow structure through a combined structure, improve the combination convenience and the production efficiency and reduce the manufacturing difficulty and the cost.
Preferably, the valve plug frame cover is formed by connecting a front end circular disc and a rear end flange disc into an I shape through a middle pipe; the valve plug is buckled on the periphery of the front end circular disc; the end surface of the rear flange is provided with a socket hole which is communicated with the pipe hole of the middle pipe; the valve plug frame seat is of an open pipe structure, and the valve plug frame seat is inserted into the socket hole through the pipe orifice section of the open pipe. So that valve plug frame lid and valve plug frame seat all form tubular structure to further increase volume, increase buoyancy improves the quick response effect, and reduces material consumption, reduces manufacturing cost.
Preferably, the plug cage cover and the plug cage seat are made of the same thermoplastic material and are further welded by heat fusion to form a sealed internal cavity.
In order to achieve the second objective, the present invention adopts the following technical solutions.
A check valve comprises a valve core which is arranged in a fluid pipeline of the valve and is provided with a horn-shaped valve port and a sliding movement, wherein the valve core is formed by the valve core which achieves the first purpose, and a valve plug is arranged upwards so as to seal the valve port by utilizing the buoyancy of fluid flowing in the opposite direction in the fluid pipeline.
By adopting the valve adopting the technical scheme, in the positive flow process that fluid flows from the small end of the bell mouth to the large end, the valve core is separated from the bell mouth, and the fluid normally flows. When the valve plug of case set up to be used for carrying under the liquid condition, at the reverse flow in-process of fluid, utilize liquid buoyancy to make the valve plug form the shutoff to the horn mouth, thereby form non return structure. When the reverse liquid pressure is increased, the effect of the liquid pressure further enhances the plugging effect.
Preferably, the fluid conduit is constituted by a valve cover of a ball valve. Thus, the ball valve is integrated on the ball valve to form a check ball valve, and the function of the reverse pipe section of the ball valve can be strengthened. Wherein the ball valve comprises a prior art internally or externally threaded ball valve.
Further preferably, the valve cover is formed with an internal thread union. The check ball valve with the anti-theft function is formed and is suitable for a pipe network which needs strict metering management.
Further preferably, the ball valve has a fluid inlet end with an internally threaded interface. So as to be connected with the pipeline or the joint of external screw thread interface, even if necessary, even need process the screw thread on pipeline or joint, also only need process the external screw thread, can ensure pipe network construction convenience through the convenient realization external screw thread processing of die.
The beneficial effects of the utility model are that, case simple structure, processing are convenient, low in manufacturing cost. When the ball valve is used for a ball valve, the ball valve is arranged in the valve cover channel, is suitable for conveying liquid with relatively large density, can form reverse quick cut-off by utilizing liquid buoyancy, and is particularly suitable for conveying water and toxic and harmful liquid or corrosive liquid with relatively large density.
Drawings
Fig. 1 is a schematic structural diagram of the valve core of the check valve of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1 according to the present invention.
Fig. 3 is a bottom view of fig. 1 according to the present invention.
Fig. 4 is a sectional view of fig. 1 taken along line B-B.
Fig. 5 is a schematic view of the check valve of the present invention, wherein the check structure is in an open state.
Fig. 6 is a schematic view of the check valve of the present invention, wherein the check structure is in a closed state.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, which are not intended to limit the scope of the embodiments described herein.
Wherein, the guide section forms a dart tail structure by a plurality of fins 1c, and the space between adjacent fins 1c forms a fluid channel; the radial far end edges of all the fins 1c are positioned in the same cylinder, and the end parts of the fins 1c close to the valve plug 2 form a flow guiding inclined surface so as to further improve the quick response capability.
Preferably, the valve plug frame 1 consists of a valve plug frame cover 1a and a valve plug frame seat 1b, and the valve plug frame cover 1a and the valve plug frame seat 1b are in socket connection; the valve plug 2 is fixedly connected to the valve plug cage cover 1a, and the guide section is formed on the valve plug cage seat 1 b. The valve plug frame cover 1a is formed by connecting a front end circular disc and a rear end flange disc into an I shape through a middle pipe; the valve plug 2 is buckled on the periphery of the front end disc; the end surface of the rear flange is provided with a socket hole which is communicated with the pipe hole of the middle pipe; the valve plug frame seat 1b is of an open pipe structure, and the valve plug frame seat 1b is inserted into the socket hole through the pipe orifice section of the open pipe. And the plug cage cover 1a and the plug cage seat 1b are made of the same thermoplastic material and are welded by heat fusion to form a sealed internal cavity.
The number of fins 1c in this embodiment is four, and a plurality of natural numbers other than four may be used.
Wherein the fluid conduit 3 is constituted by a bonnet of a ball valve 6, which is formed with an internally threaded union, and which has a fluid inlet end with an internally threaded interface. The valve plug frame seat 1b tail part wing panel 1c of the valve plug is in sliding fit with the corresponding section of the inner hole of the valve cover, the valve cover is provided with an elastic retaining ring 5, the elastic retaining ring 5 is used for preventing the valve plug from being separated from the valve cover, a ring groove is formed in the pipe section of the large end of the horn-shaped valve port 4, and the diameter of the ring groove is larger than that of the large end of the valve plug 2.
The rest of the structure of the check valve core of this embodiment is the same as that of embodiment 1, and is not described again here.
The arrows in fig. 5 indicate the positive flow direction of the liquid, and the arrows in fig. 6 indicate the buoyancy of the liquid against the valve element.
In this embodiment, the internal thread check ball valve is formed by the internal thread ball valve and the check structure having the valve core. Obviously, a check structure with the check valve core can be arranged in the valve cover of the ball valve with the external threaded interface to form the threaded check ball valve.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A check valve core comprises a valve plug frame (1) and a valve plug (2) sleeved and fixed on the head of the valve plug frame (1), wherein the valve plug (2) is provided with an arc-shaped sealing surface and is made of an elastomer material, and the tail part of the valve plug frame (1) forms a guide section; the valve plug frame (1) is in a hollow sealing pipe structure; a fluid channel is formed on the outer wall of the pipe body of the guide section, and the outer diameter of the pipe section in the middle of the valve plug frame (1) is smaller than that of the guide section.
2. The check valve cartridge according to claim 1, wherein the guide section is formed of a plurality of fins (1 c) to form a dart tail structure, and a space between adjacent fins (1 c) constitutes the fluid passage.
3. The check valve cartridge as recited in claim 1, characterized in that the valve plug cage (1) is composed of a valve plug cage cover (1 a) and a valve plug cage seat (1 b), the valve plug cage cover (1 a) and the valve plug cage seat (1 b) being socket-connected; the valve plug (2) is fixedly connected to the valve plug frame cover (1 a), and the guide section is formed on the valve plug frame seat (1 b).
4. The check valve cartridge according to claim 3, wherein the plug cage cover (1 a) is connected in an i-shape by a front end circular disk and a rear end flange disk through a middle tube; the valve plug (2) is buckled on the periphery of the front end circular disc; the end surface of the rear flange is provided with a socket hole which is communicated with the pipe hole of the middle pipe; the valve plug frame seat (1 b) is of an open pipe structure, and the valve plug frame seat (1 b) is inserted into the socket hole through the pipe orifice section of the open pipe.
5. The check valve cartridge according to claim 3, wherein the plug cage cover (1 a) and the plug cage seat (1 b) are made of the same thermoplastic material and are further welded by heat fusion to form a sealed internal cavity.
6. The check valve cartridge as claimed in claim 1, characterized in that the valve plug holder (1) is made of ABS; the valve plug (2) is made of nitrile rubber.
7. A check valve comprises a valve core which is arranged in a fluid pipeline (3) of the valve and is moved by a horn-shaped valve port and sliding; the check valve is characterized in that the valve core is formed by the check valve core as claimed in any one of claims 1-6, and the valve plug is arranged upwards to seal the valve port in the fluid pipeline (3) by utilizing the buoyancy of fluid flowing reversely.
8. Non-return valve according to claim 7, characterized in that the fluid conduit (3) is constituted by the valve cover of a ball valve.
9. The check valve of claim 8 wherein said cap has an internally threaded union formed thereon.
10. The check valve of claim 8, wherein the ball valve has a fluid inlet end with an internally threaded interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921198143.2U CN211474968U (en) | 2019-07-26 | 2019-07-26 | Check valve core and check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921198143.2U CN211474968U (en) | 2019-07-26 | 2019-07-26 | Check valve core and check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211474968U true CN211474968U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921198143.2U Active CN211474968U (en) | 2019-07-26 | 2019-07-26 | Check valve core and check valve |
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| Country | Link |
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| CN (1) | CN211474968U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285243A (en) * | 2019-07-26 | 2019-09-27 | 重庆吉川燃气设备有限公司 | A kind of check valve spool and check-valves |
-
2019
- 2019-07-26 CN CN201921198143.2U patent/CN211474968U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285243A (en) * | 2019-07-26 | 2019-09-27 | 重庆吉川燃气设备有限公司 | A kind of check valve spool and check-valves |
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