CN216279571U - Backflow-preventing check valve - Google Patents
Backflow-preventing check valve Download PDFInfo
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- CN216279571U CN216279571U CN202122566058.0U CN202122566058U CN216279571U CN 216279571 U CN216279571 U CN 216279571U CN 202122566058 U CN202122566058 U CN 202122566058U CN 216279571 U CN216279571 U CN 216279571U
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- valve
- backflow prevention
- check valve
- flow cavity
- filter screen
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Abstract
The utility model discloses a backflow-preventing check valve which comprises a valve body, a valve rod base, a first flow cavity and a second flow cavity, wherein a valve cover is installed at the top end of the valve body, a water inlet is formed in one side of the valve body, a water outlet is formed in the other side of the valve body, the valve rod base is arranged in the valve body, a check valve rod is installed in the valve rod base, the check valve rod is fixedly connected with a valve clack through a buffer spring, the first flow cavity is arranged in the water inlet, a first filter screen is arranged in the first flow cavity, the second flow cavity is arranged in the water outlet, a backflow-preventing mechanism is arranged in the second flow cavity, and a second filter screen is arranged on one side of the backflow-preventing mechanism. This backflow prevention check valve is provided with first filter screen and backflow prevention mechanism, and impurity in the first filter screen cooperation second filter screen use can effective filter medium avoids taking place the jam accident, and backflow prevention mechanism can effectively prevent that the medium refluence phenomenon from taking place.
Description
Technical Field
The utility model relates to the technical field of check valves, in particular to a backflow prevention check valve.
Background
The check valve is a valve which automatically opens and closes a valve flap by the flow of a medium and is used for preventing the medium from flowing backwards, and is also called a check valve, a one-way valve, a reverse flow valve and a back pressure valve. The check valve is an automatic valve and mainly used for preventing medium from flowing backwards, preventing the pump and a driving motor from reversing and discharging container medium. Check valve: according to the structural division, the check valve can be divided into a lifting check valve, a swing check valve and a butterfly check valve. The lift check valve can be divided into a vertical type and a straight-through type. The swing check valve is divided into a single-flap type, a double-flap type and a multi-flap type. The butterfly check valves are butterfly double-clack type check valves, butterfly single-clack type check valves, and the connection modes of the butterfly check valves can be divided into four types, namely threaded connection, flange connection, welding and wafer type connection. The backflow prevention effect of the existing check valve is poor, the backflow phenomenon of the check valve is easy to occur in the using process, maintenance and repair are needed, manpower and material resources are wasted, the practicability of the existing check valve is low, the check valve is easy to cause blocking accidents in the conveying process, particles are contained in the conveyed medium, the blocking accidents are easy to cause, and the cleaning is troublesome.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a backflow prevention check valve, which solves the problems that the backflow prevention effect of the existing check valve is poor and the practicability of the existing check valve is low in the background art.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a prevent check valve of refluence, includes valve body, valve rod base, first flow cavity and second flow cavity, the valve gap is installed on the valve body top, and valve body one side is equipped with the water inlet, and the valve body opposite side is equipped with the delivery port simultaneously, the valve rod base sets up inside the valve body, and installs the check valve rod in the valve rod base, and the check valve rod passes through buffer spring and valve clack fixed connection simultaneously, first flow cavity sets up inside the water inlet, and is provided with first filter screen in the first flow cavity, the second flow cavity sets up inside the delivery port, and is provided with in the second flow cavity and prevents the backflow mechanism, prevents that backflow mechanism one side is equipped with the second filter screen simultaneously.
Through adopting above-mentioned technical scheme, the check valve rod cooperation buffer spring and the valve clack that are equipped with use, are convenient for carry on spacingly to the medium.
Preferably, the backflow prevention mechanism comprises a connecting rotating shaft, a backflow prevention plate, a first limiting block and a second limiting block, the connecting rotating shaft is rotatably connected with the backflow prevention plate, the first limiting block is arranged on one side of the connecting rotating shaft, and the second limiting block is arranged on the other side of the backflow prevention plate.
Through adopting above-mentioned technical scheme, the backflow prevention mechanism that is equipped with can effectively prevent that the medium refluence phenomenon from taking place, plays the effect of non return.
Preferably, the backflow prevention plate is obliquely arranged inside the second flow cavity.
Through adopting above-mentioned technical scheme, the anti-backflow board that is equipped with can seal the circulation mouth to can't let the medium backward flow, play the effect of non return.
Preferably, the buffer spring is not in contact with the valve rod base.
Through adopting above-mentioned technical scheme, the buffer spring buffering effect that is equipped with is better, can effectively cushion the impact force that produces.
Preferably, the first and second flow chambers are the same size.
Through adopting above-mentioned technical scheme, the first flow cavity and the second flow cavity that are equipped with are convenient for the medium and are flowed.
Preferably, the first filter and the second filter are the same size.
Through adopting above-mentioned technical scheme, the first filter screen that is equipped with cooperates the second filter screen to use, impurity in can effective filter medium.
Compared with the prior art, the utility model has the beneficial effects that: the backflow-preventing check valve is arranged on the upper portion of the valve body,
(1) the backflow prevention mechanism can effectively seal the flow through hole through the backflow prevention plate, so that a medium can not flow back, and a backflow prevention effect is achieved;
(2) be provided with first filter screen and second filter screen, first filter screen sets up inside the water inlet, and first filter screen filter effect is better, and impurity in the first filter screen can effective filter medium avoids the water inlet to take place the jam accident, and the second filter screen sets up inside the delivery port, and impurity in the second flow cavity can effectively be filtered to the second filter screen, and this kind of filtration mode is more simple, and the filter effect is better, improves the check valve practicality greatly.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
fig. 3 is a schematic structural view of the backflow prevention mechanism of the present invention.
In the figure: 1. valve body, 2, valve gap, 3, water inlet, 4, delivery port, 5, valve rod base, 6, check valve rod, 7, buffer spring, 8, valve clack, 9, first flow chamber, 10, first filter screen, 11, second flow chamber, 12, backflow prevention mechanism, 1201, connect the pivot, 1202, backflow prevention board, 1203, first stopper, 1204, second stopper, 13, the second filter screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a backflow prevention check valve, as shown in fig. 1 and 2, a valve cap 2 is installed at the top end of a valve body 1, a water inlet 3 is installed at one side of the valve body 1, a water outlet 4 is installed at the other side of the valve body 1, a valve stem base 5 is installed inside the valve body 1, a check valve stem 6 is installed in the valve stem base 5, the check valve stem 6 is fixedly connected with a valve flap 8 through a buffer spring 7, the buffer spring 7 is not in contact with the valve stem base 5, the buffer spring 7 has a good buffer effect, the buffer spring 7 can effectively reduce the impact force generated by the valve stem base 5 and the valve flap 8, and the valve body 1 is prevented from being damaged, the buffer mode is simple, the buffer effect is good, and the use is convenient, a first flow cavity 9 is installed inside the water inlet 3, a first filter screen 10 is installed in the first flow cavity 9, and the first flow cavity 9 and a second flow cavity 11 have the same size, the first flow cavity 9 is matched with the second flow cavity 11 for use, so that the medium in the valve body 1 can flow conveniently, and the mode is simple and convenient to use.
As shown in fig. 2 and fig. 3, the second flow chamber 11 is disposed inside the water outlet 4, and a backflow prevention mechanism 12 is disposed in the second flow chamber 11, and a second filter 13 is disposed on one side of the backflow prevention mechanism 12, the backflow prevention mechanism 12 includes a connecting rotating shaft 1201, a backflow prevention plate 1202, a first stopper 1203 and a second stopper 1204, the connecting rotating shaft 1201 is rotatably connected to the backflow prevention plate 1202, the first stopper 1203 is disposed on one side of the connecting rotating shaft 1201, the second stopper 1204 is disposed on the other side of the backflow prevention plate 1202, the first stopper 1203 is used in cooperation with the second stopper 1204 to limit the backflow prevention plate 1202, so as to prevent a backflow event, the backflow prevention plate 1202 is obliquely disposed inside the second flow chamber 11, the backflow prevention plate 1202 can seal the flow opening, thereby preventing the medium from flowing backwards, and achieving a backflow prevention effect, the backflow prevention manner is simple and the backflow prevention effect is good, convenient to use, first filter screen 10 and second filter screen 13 size are the same, and first filter screen 10 cooperation second filter screen 13 uses, is convenient for filter impurity in the medium, avoids taking place the jam accident, and this kind of filtration is comparatively simple, and the filter effect is better, convenient to use.
The working principle is as follows: when the backflow prevention check valve is used, the water inlet 3 is in threaded connection with an external pipeline, the first filter screen 10 and the second filter screen 13 which are arranged inside the first flow cavity 9 and the second flow cavity 11 can filter impurities such as particles in a conveyed medium, and prevent the occurrence of blocking accidents and the problem that the valve cannot be used, the filtering mode is simple, the filtering effect is good, and the use is convenient, the valve rod base 5 is matched with the check valve rod 6, the buffer spring 7 and the valve clack 8 for use, so that the medium in the valve body 1 can be conveniently limited, the buffer spring 7 has good buffering effect, the buffer spring 7 can effectively buffer the generated impact force, the damage to the valve body 1 is avoided, the backflow prevention mechanism 12 can effectively prevent the medium from flowing backwards, when the medium flows towards one direction, the backflow prevention plate 1202 plays a limiting role with the first limiting block 1203 under the rotation of the connecting rotating shaft 1201, when the medium flows back, the backflow preventing plate 1202 performs a limiting function with the second limiting block 1204 under the rotation of the connecting rotating shaft 1201, so as to seal the flow opening, prevent the medium from flowing back, and perform a non-return function.
The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for simplicity of description only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be considered limiting of the claimed invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.
Claims (6)
1. The utility model provides a prevent check valve of refluence, includes valve body (1), valve rod base (5), first flow cavity (9) and second flow cavity (11), its characterized in that: valve gap (2) are installed on valve body (1) top, and valve body (1) one side is equipped with water inlet (3), and valve body (1) opposite side is equipped with delivery port (4) simultaneously, valve rod base (5) set up inside valve body (1), and install check valve rod (6) in valve rod base (5), and check valve rod (6) pass through buffer spring (7) and valve clack (8) fixed connection simultaneously, first flow cavity (9) set up inside water inlet (3), and are provided with first filter screen (10) in first flow cavity (9), second flow cavity (11) set up inside delivery port (4), and are provided with in second flow cavity (11) and prevent that flow mechanism (12) one side is equipped with second filter screen (13) simultaneously.
2. A backflow prevention check valve as claimed in claim 1, wherein: the backflow prevention mechanism (12) comprises a connecting rotating shaft (1201), a backflow prevention plate (1202), a first limiting block (1203) and a second limiting block (1204), the connecting rotating shaft (1201) is rotatably connected with the backflow prevention plate (1202), the first limiting block (1203) is arranged on one side of the connecting rotating shaft (1201), and the second limiting block (1204) is arranged on the other side of the backflow prevention plate (1202).
3. A backflow prevention check valve as claimed in claim 2, wherein: the backflow preventing plate (1202) is obliquely arranged inside the second flow cavity (11).
4. A backflow prevention check valve as claimed in claim 1, wherein: the buffer spring (7) and the valve rod base (5) are not in contact.
5. A backflow prevention check valve as claimed in claim 1, wherein: the first flow chamber (9) and the second flow chamber (11) are of the same size.
6. A backflow prevention check valve as claimed in claim 1, wherein: the first filter screen (10) and the second filter screen (13) are the same in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122566058.0U CN216279571U (en) | 2021-10-25 | 2021-10-25 | Backflow-preventing check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122566058.0U CN216279571U (en) | 2021-10-25 | 2021-10-25 | Backflow-preventing check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216279571U true CN216279571U (en) | 2022-04-12 |
Family
ID=81069972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122566058.0U Active CN216279571U (en) | 2021-10-25 | 2021-10-25 | Backflow-preventing check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216279571U (en) |
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2021
- 2021-10-25 CN CN202122566058.0U patent/CN216279571U/en active Active
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