CN214999608U - Single-diaphragm low-resistance backflow preventer - Google Patents
Single-diaphragm low-resistance backflow preventer Download PDFInfo
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- CN214999608U CN214999608U CN202121331323.0U CN202121331323U CN214999608U CN 214999608 U CN214999608 U CN 214999608U CN 202121331323 U CN202121331323 U CN 202121331323U CN 214999608 U CN214999608 U CN 214999608U
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Abstract
The utility model discloses a low resistance backflow preventer of single diaphragm, including the main valve body and the auxiliary valve body, be equipped with the case subassembly in the cavity that the main valve body and auxiliary valve body formed, the main valve body up end is fixed and is provided with the valve gap, and the terminal surface is provided with the sluicing device under the main valve body, is provided with the water inlet on the main valve body, is provided with the delivery port on the auxiliary valve body. The utility model discloses in, in operation, the pressure before the valve is greater than the pressure behind the valve, first return spring of first check valve clack compression, second return spring of second check valve clack compression, main valve internal wall is kept away from to so first check valve clack, vice valve body inner wall is kept away from to the second check valve clack, then normally supply water, when the pressure of delivery port is greater than the pressure of water inlet, under pressure differential, first return spring and second return spring's effect, the main valve internal wall of first check valve clack laminating, the vice valve body inner wall of second check valve clack laminating, so can effectually prevent the liquid reflux.
Description
Technical Field
The utility model relates to a valve equipment field specifically is a low resistance backflow preventer of single diaphragm.
Background
The low-resistance backflow preventer is a hydraulic control combination device which strictly limits that pressure water in a pipeline can only flow in one direction when water is supplied by urban water supply and general pollution units, and has the function of effectively preventing a medium with poor water quality at an outlet end from flowing back to an inlet end with good water quality when a water supply system generates siphon backflow and backpressure backflow, so that the water quality pollution to domestic drinking water is avoided, and the safety of domestic water supply is ensured.
Currently, in some projects it is necessary to ensure that the flow of fluid is in a fixed direction, preventing the backflow of fluid, for which the skilled person has designed a low resistance backflow preventer with one-way conduction, the flow of fluid being in a pre-designed direction, which would cause the check valve to close if the flow of fluid were reversed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low resistance backflow preventer of single diaphragm to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a single-diaphragm low-resistance backflow preventer comprises a main valve body and an auxiliary valve body, wherein a valve core assembly is arranged in a cavity formed by the main valve body and the auxiliary valve body, a valve cover is fixedly arranged on the upper end face of the main valve body, a water draining device is arranged on the lower end face of the main valve body, a water inlet is formed in the main valve body, and a water outlet is formed in the auxiliary valve body;
the case subassembly includes valve rod, first check valve clack and second check valve clack, the main valve internal wall all is provided with first gag lever post from top to bottom, first gag lever post outside sliding connection has first check valve clack, two the one end fixed mounting that the main valve internal wall was kept away from to first gag lever post has first anticreep piece, be provided with first reset spring between first check valve clack and the first anticreep piece, vice valve internal wall all is provided with the second gag lever post from top to bottom, second gag lever post outside sliding connection has second check valve clack, two the one end fixed mounting that vice valve internal wall was kept away from to the second gag lever post has second anticreep piece, be provided with second reset spring between second check valve clack and the second anticreep piece, be provided with the valve rod between first check valve clack and the second check valve clack.
Furthermore, two the lateral wall fixed connection of water inlet is all kept away from with first check valve clack to first reset spring one end, two the first reset spring other end all with first anticreep piece fixed connection.
Furthermore, two lateral wall fixed connection, two that second reset spring one end all keeps away from the delivery port with second check valve clack is second reset spring one end all with second anticreep piece fixed connection.
Further, valve rod one end passes through bolt and first check valve clack fixed connection, the valve rod other end passes through bolt and second check valve clack fixed connection.
Furthermore, sealing gaskets are arranged on the side wall, close to the water inlet, of the first check valve clack and on the side wall, close to the water outlet, of the second check valve clack.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses in, at first check valve clack and second check valve clack correspond respectively to slide on first gag lever post and the second gag lever post outside, in operation, the pressure before the valve is greater than the pressure behind the valve, so the first check valve clack that sets up on the main valve body passes through the valve rod and promotes second check valve clack, and the first reset spring of first check valve clack compression, second check valve clack compression second reset spring, so main valve internal wall is kept away from to first check valve clack, vice valve body inner wall is kept away from to the second check valve clack, then normally supply water, when the pressure of delivery port is greater than the pressure of water inlet, at pressure differential, under first reset spring and second reset spring's effect, the main valve internal wall of first check valve clack laminating, the vice valve body inner wall of second check valve clack laminating, so can effectually prevent the liquid backward flow.
Drawings
FIG. 1 is a schematic sectional view showing the flow-through state of a single-diaphragm low-resistance backflow preventer;
FIG. 2 is a schematic sectional view of a single-diaphragm low-resistance backflow preventer in a water-stop state.
In the figure: 10. a main valve body; 11. a sub-valve body; 12. a valve cover; 13. a water discharge device; 14. a water inlet; 15. a water outlet; 20. a valve stem; 21. a first check valve flap; 22. a second check valve flap; 23. a first limit rod; 24. a first anti-drop block; 25. a first return spring; 26. a second limiting rod; 27. a second anti-drop block; 28. a second return spring; 29. and a gasket.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution:
a single-diaphragm low-resistance backflow preventer comprises a main valve body 10 and an auxiliary valve body 11, wherein a valve core assembly is arranged in a cavity formed by the main valve body 10 and the auxiliary valve body 11, a valve cover 12 is fixedly arranged on the upper end face of the main valve body 10, a water draining device 13 is arranged on the lower end face of the main valve body 10, a water inlet 14 is arranged on the main valve body 10, and a water outlet 15 is arranged on the auxiliary valve body 11;
the case subassembly includes valve rod 20, first check valve clack 21 and second check valve clack 22, main valve body 10 inner wall all is provided with first gag lever post 23 from top to bottom, first gag lever post 23 outside sliding connection has first check valve clack 21, the one end fixed mounting that main valve body 10 inner wall was kept away from to two first gag lever posts 23 has first anticreep piece 24, be provided with first reset spring 25 between first check valve clack 21 and the first anticreep piece 24, 11 inner walls of vice valve body all are provided with second gag lever post 26 from top to bottom, 26 outside sliding connection of second gag lever post has second check valve clack 22, the one end fixed mounting that 11 inner walls of vice valve body were kept away from to two second gag lever posts 26 has second anticreep piece 27, be provided with second reset spring 28 between second check valve clack 22 and the second anticreep piece 27, be provided with valve rod 20 between first check valve clack 21 and the second check valve clack 22.
In addition, two first reset spring 25 one ends all keep away from the lateral wall fixed connection of water inlet 14 with first check valve clack 21, and two first reset spring 25 other ends all with first anticreep piece 24 fixed connection.
One end of each of the two second return springs 28 is fixedly connected to the side wall of the second check valve flap 22 far away from the water outlet 15, and one end of each of the two second return springs 28 is fixedly connected to the second anti-falling block 27.
One end of the valve rod 20 is fixedly connected with the first check valve clack 21 through a bolt, and the other end of the valve rod 20 is fixedly connected with the second check valve clack 22 through a bolt.
The side walls of the first check valve flap 21 close to the water inlet 14 and the side walls of the second check valve flap 22 close to the water outlet 15 are provided with sealing gaskets 29.
The working principle is as follows: first, the first check valve clack 21 and the second check valve clack 22 respectively slide on the first limiting rod 23 and outside the second limiting rod 26 correspondingly, when in work, the pressure in front of the valve is larger than the pressure behind the valve, the first check valve flap 21 thus provided on the main valve body 10 pushes the second check valve flap 22 via the valve stem 20, and the first check valve flap 21 compresses the first return spring 25, the second check valve flap 22 compresses the second return spring 28, thus, the first check valve clack 21 is far away from the inner wall of the main valve body 10, the second check valve clack 22 is far away from the inner wall of the auxiliary valve body 11, then water is normally supplied, when the pressure of the water outlet 15 is larger than that of the water inlet 14, under the action of the pressure difference and the first return spring 25 and the second return spring 28, the first check valve clack 21 is attached to the inner wall of the main valve body 10, and the second check valve clack 22 is attached to the inner wall of the auxiliary valve body 11, so that liquid can be effectively prevented from flowing back.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a single diaphragm low resistance backflow preventer, includes main valve body (10) and vice valve body (11), its characterized in that: a valve core assembly is arranged in a cavity formed by the main valve body (10) and the auxiliary valve body (11), a valve cover (12) is fixedly arranged on the upper end face of the main valve body (10), a water draining device (13) is arranged on the lower end face of the main valve body (10), a water inlet (14) is arranged on the main valve body (10), and a water outlet (15) is arranged on the auxiliary valve body (11);
the valve core assembly comprises a valve rod (20), a first check valve clack (21) and a second check valve clack (22), a first limiting rod (23) is arranged on the inner wall of the main valve body (10) from top to bottom, the outer side of the first limiting rod (23) is slidably connected with the first check valve clack (21) and is connected with the second check valve clack (22), a first anti-falling block (24) is fixedly arranged at one end, away from the inner wall of the main valve body (10), of the first limiting rod (23), a first reset spring (25) is arranged between the first check valve clack (21) and the first anti-falling block (24), a second limiting rod (26) is arranged on the inner wall of the auxiliary valve body (11) from top to bottom, the outer side of the second limiting rod (26) is slidably connected with the second check valve clack (22) and is connected with the second check valve clack (26) at one end, away from the inner wall of the auxiliary valve body (11), of the second limiting rod (26), a second anti-falling block (27), and a second reset spring (27) is arranged between the second check valve clack (22) and the second anti-falling block (27) 28) A valve stem (20) is disposed between the first check valve flap (21) and the second check valve flap (22).
2. A single-diaphragm low-resistance backflow preventer as claimed in claim 1, wherein: two lateral wall fixed connection, two that water inlet (14) were kept away from to first reset spring (25) one end all with first check valve clack (21) first reset spring (25) other end all with first anticreep piece (24) fixed connection.
3. A single-diaphragm low-resistance backflow preventer as claimed in claim 1, wherein: two lateral wall fixed connection, two that delivery port (15) were kept away from to second reset spring (28) one end all with second check valve clack (22) one end all with second anticreep piece (27) fixed connection.
4. A single-diaphragm low-resistance backflow preventer as claimed in claim 1, wherein: valve rod (20) one end passes through bolt and first check valve clack (21) fixed connection, the valve rod (20) other end passes through bolt and second check valve clack (22) fixed connection.
5. A single-diaphragm low-resistance backflow preventer as claimed in claim 1, wherein: and sealing gaskets (29) are arranged on the side wall of the first check valve clack (21) close to the water inlet (14) and the side wall of the second check valve clack (22) close to the water outlet (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331323.0U CN214999608U (en) | 2021-06-16 | 2021-06-16 | Single-diaphragm low-resistance backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331323.0U CN214999608U (en) | 2021-06-16 | 2021-06-16 | Single-diaphragm low-resistance backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214999608U true CN214999608U (en) | 2021-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121331323.0U Active CN214999608U (en) | 2021-06-16 | 2021-06-16 | Single-diaphragm low-resistance backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214999608U (en) |
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2021
- 2021-06-16 CN CN202121331323.0U patent/CN214999608U/en active Active
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