Non-return structure suitable for front-back installation of water meter

Abstract

The utility model discloses a non-return structure suitable for front and back installation of a water meter, which comprises the water meter and a non-return valve, and is mainly characterized in that a connecting assembly is arranged between the water meter and the non-return valve, and the connecting assembly comprises a connecting pipe, and a large loose joint nut and a small loose joint nut which are respectively installed at two ends of the connecting pipe in an anti-falling manner; meanwhile, a valve cover pipe in sealed connection is additionally arranged at the outlet end of the check valve; therefore, the large loose joint nut is hermetically connected with the inlet end of the water meter, the small loose joint nut is hermetically connected with the valve cover pipe at the outlet end of the check valve, and the check valve can be mounted in front of the meter relative to the water meter; the large loose joint nut is connected with the outlet end of the water meter in a sealed mode, the small loose joint nut is connected with the inlet end of the check valve in a sealed mode, and the check valve can be installed behind the water meter relative to the water meter. Obviously, through the structural design that the connecting assembly is additionally arranged and the valve cover pipe at the outlet end of the check valve is combined, the check valve can be flexibly installed in front of or behind the meter, and therefore the check valve has the advantages of being high in applicability, high in error-tolerant rate and the like, and product inventory and operation cost can be reduced.

Description

Technical Field

[0001] The utility model relates to a non-return structure, in particular to a non-return structure suitable for front and rear installation of a water meter. Background Art

[0002] At present, water meters installed on water supply pipes need to be equipped with a check structure, usually a check valve is installed before or after the water meter, the purpose of which is to prevent water from flowing back and causing the water meter to reverse; however, traditional check valves are either pre-meter check valves, that is, they can only be installed in front of the water meter, or post-meter check valves, that is, they can only be installed after the water meter, and these two types of check valves cannot be flexibly installed before or after the meter, which greatly affects the applicability of the product, reduces the fault tolerance of selection and installation, and brings great pressure on the manufacturer's product inventory types, quantity and capital occupation, and also increases the manufacturer's operating costs. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a check structure which can flexibly install the check valve before or after the water meter.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A check structure suitable for installation before and after a water meter comprises a water meter and a check valve, wherein a connecting assembly is arranged between the water meter and the check valve, and the connecting assembly comprises a connecting pipe, and a large union nut and a small union nut respectively installed at both ends of the connecting pipe; the large union nut is sealingly connected to the inlet end of the water meter, the small union nut is sealingly connected to the outlet end of the check valve, and the check valve is installed in front of the water meter; the large union nut is sealingly connected to the outlet end of the water meter, the small union nut is sealingly connected to the inlet end of the check valve, and the check valve is installed behind the water meter.

[0006] The check valve comprises a valve body and a check assembly arranged in the valve body. The two ends of the valve body are respectively arranged as the inlet end and the outlet end of the check valve. A valve cover tube which is sealed and installed is arranged in the outlet end.

[0007] The sealing connection between the small union nut and the check valve outlet end is that the small union nut directly seals and connects the valve cover pipe; the sealing connection between the small union nut and the check valve inlet end is that the small union nut directly seals and connects the valve body end.

[0008] An inner anti-slip ring and an outer anti-slip ring for anti-slip installation are respectively arranged between the large swivel nut and the end of the pipe.

[0009] An anti-slip inner ring and a clamping ring for anti-slip installation are respectively arranged between the small union nut and the end of the connecting pipe.

[0010] The check assembly comprises a check valve core, a valve flap mounted on the check valve core and a check spring sleeved on the check valve core. The check spring elastically pushes the check valve core and drives the valve flap to seal and close the water hole in the valve body.

[0011] A front guide hole is arranged in the valve body, a rear guide hole is arranged in the valve cover tube, and both ends of the check valve core are movably installed in the front guide hole and the rear guide hole respectively.

[0012] The rear end of the check spring is installed on a spring seat with a fixed position, and the front end of the check spring elastically pushes on the outer shoulder of the check valve core.

[0013] A circle of sealing bosses is arranged at the hole edge of the water-through hole, and the valve flap contacts the sealing bosses to seal and close the water-through hole.

[0014] Compared with the prior art, the utility model mainly provides a connecting assembly between the water meter and the check valve, and the connecting assembly includes a connecting pipe, and a large union nut and a small union nut respectively installed at both ends of the connecting pipe; at the same time, a valve cover pipe for sealing connection is also added at the outlet end of the check valve; in this way, it is only necessary to seal the large union nut to connect the inlet end of the water meter, and the small union nut to directly seal the valve cover pipe at the outlet end of the check valve, that is, the small union nut that could not be directly connected originally is smoothly connected to the outlet end of the check valve through the additional valve cover pipe, so that the check valve is relatively watertight. The check valve can be installed in front of the water meter and produce a check function; the large union nut is sealed and connected to the outlet end of the water meter, and the small union nut is directly sealed and connected to the inlet end of the check valve, so that the check valve can be installed behind the water meter and produce a check function; obviously, by adding a connecting component and combining the valve cover tube design at the outlet end of the check valve, the check valve can be flexibly installed in front of or behind the water meter, thereby enhancing the applicability of the product, reducing the error rate in selection and installation, and reducing the manufacturer's product inventory types, quantity and capital occupation, and also reducing the manufacturer's operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model installed according to the table.

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model installed in front of the table.

[0017] Figure 3 Cross-sectional view of a check valve.

[0018] Figure 4 A cross-sectional view of the valve body.

[0019] Figure 5 It is a cross-sectional view of the valve cover tube.

[0020] Figure 6 A cross-sectional view of the connection assembly.

[0021] Figure 7 This is a cross-sectional view of the pipe.

[0022] Figure 8 This is a cross-sectional view of a small union nut.

[0023] Fig. 9 It is a cross-sectional view of a large union nut. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0025] like Figure 1 to Figure 9 As shown, 1. water meter, 2. check valve, 21. valve body, 211. water hole, 212. sealing boss, 213. front guide hole, 22. check assembly, 221. check valve core, 222. valve disc, 223. check spring, 224. spring seat, 3. connecting assembly, 31. connecting pipe, 311. anti-slip outer ring, 32. large union nut, 33. small union nut, 34. retaining ring, 35. sealing gasket, 36. anti-slip inner ring, 4. valve cover tube, 41. rear guide hole, 5. sealing ring.

[0026] A check structure suitable for installation before and after a water meter, such as Figure 1 , Figure 2 As shown, it mainly involves a check valve 2 that can be flexibly installed before or after the water meter 1, thereby preventing water from flowing back and causing the water meter to reverse. The check structure also includes a connecting component 3, etc.

[0027] The check valve 2 comprises a valve body 21 and a check assembly 22 arranged in the valve body. The two ends of the valve body 21 are respectively arranged as the inlet end and the outlet end of the check valve, and a valve cover tube 4 connected by threaded tightening is arranged in the outlet end, and a sealing ring 5 is also arranged at the connection between the two to form a sealed installation.

[0028] The check assembly 22 includes a check valve core 221, a valve flap 222 installed on the check valve core and a check spring 223 sleeved on the check valve core; wherein, a coaxial outer shoulder is provided in the middle of the check valve core 221, and the valve flap 222 is nested and fixed on the front side of the outer shoulder. The front end of the check spring 223 elastically pushes on the outer shoulder of the check valve core 221, and the rear end of the check spring 223 is installed on a spring seat 224 fixed in a position. Therefore, the elastic pushing of the check spring 223 can push the check valve core 221 to move axially toward each other, thereby driving the valve flap 222 to seal the water hole 211 in the valve body 21.

[0029] In addition, a circle of sealing bosses 212 is required to be provided at the edge of the water hole 211 , so that the valve flap 222 can contact the sealing bosses 212 to form a sealed closure for the water hole 211 .

[0030] At the same time, a front guide hole 213 is provided in the valve body 21, a rear guide hole 41 is provided in the valve cover tube 4, and both ends of the check valve core 221 are movably installed in the front and rear guide holes respectively, so that the axial movement of the check valve core 221 can form a guide.

[0031] The connecting assembly 3 includes a straight tubular connecting pipe 31, and a large union nut 32 and a small union nut 33 respectively installed at both ends of the connecting pipe to prevent slipping. The anti-slip structure is as follows: an anti-slip inner ring 36 and an anti-slip outer ring 311 are respectively provided between the large union nut 32 and the end of the connecting pipe 31, and an anti-slip inner ring 36 and a retaining ring 34 are respectively provided between the small union nut 33 and the end of the connecting pipe 31 to prevent slipping.

[0032] The large union nut 32 is sealed and connected to the inlet end of the water meter 1, and the small union nut 33 is sealed and connected to the outlet end of the check valve 2, so that the check valve 2 can be installed before the water meter 1; the large union nut 32 is sealed and connected to the outlet end of the water meter 1, and the small union nut 33 is sealed and connected to the inlet end of the check valve 2, so that the check valve 2 can be installed after the water meter 1.

[0033] In this embodiment, the sealed connection between the small union nut 33 and the outlet end of the check valve is actually that the small union nut 33 is directly sealed and connected to the valve cover tube 4. Specifically, the small union nut 33 is directly connected to the valve cover tube 4 by threaded tightening, and a sealing gasket 35 is also provided at the connection between the two to form a connection seal.

[0034] The sealing connection between the small union nut 33 and the inlet end of the check valve is that the small union nut 33 is directly and sealingly connected to the end of the valve body 21. Specifically, the small union nut 33 is directly connected to the end of the valve body 21 by threaded tightening, and a sealing gasket 35 is also provided at the connection between the two to form a connection seal.

[0035] In this way, by adding a connecting component 3 and combining the valve cover tube 4 design at the outlet end of the check valve, the check valve 2 can be flexibly installed and applied before or after the water meter 1, thereby enhancing the applicability of the product, reducing the error rate in selection and installation, and reducing the types, quantities and capital occupation of the manufacturer's product inventory, and also reducing the manufacturer's operating costs.

[0036] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design similar to this embodiment should be included in the protection scope of the present invention.

Claims

1. A check valve structure suitable for installation before and after a water meter, comprising a water meter (1) and a check valve (2), characterized in that A connecting assembly (3) is provided between the water meter (1) and the check valve (2), the connecting assembly comprising a connecting pipe (31), and a large union nut (32) and a small union nut (33) respectively fixedly mounted on both ends of the connecting pipe; the large union nut (32) is sealedly connected to the inlet end of the water meter (1), and the small union nut (33) is sealedly connected to the outlet end of the check valve (2), so that the check valve (2) is installed in front of the water meter (1); the large union nut (32) is sealedly connected to the outlet end of the water meter (1), and the small union nut (33) is sealedly connected to the inlet end of the check valve (2), so that the check valve (2) is installed in the back of the water meter (1).

2. A check structure suitable for front and rear installation of a water meter according to claim 1, characterized in that The check valve (2) comprises a valve body (21) and a check assembly (22) arranged in the valve body, wherein two ends of the valve body (21) are respectively arranged as an inlet end and an outlet end of the check valve (2), and a valve cover tube (4) is provided in a sealing manner in the outlet end.

3. A check structure suitable for front and rear installation of a water meter according to claim 2, characterized in that The sealing connection between the small union nut (33) and the outlet end of the check valve (2) is that the small union nut (33) is directly and sealingly connected to the valve cover tube (4); the sealing connection between the small union nut (33) and the inlet end of the check valve (2) is that the small union nut (33) is directly and sealingly connected to the end of the valve body (21).

4. A check structure suitable for front and rear installation of a water meter according to claim 1, characterized in that An anti-slip inner ring (36) and an anti-slip outer ring (311) for anti-slip installation are respectively provided between the large movable nut (32) and the end of the connecting pipe (31).

5. A check structure suitable for front and rear installation of a water meter according to claim 1, characterized in that An anti-slip inner ring (36) and a clamping ring (34) for anti-slip installation are respectively provided between the small union nut (33) and the end of the connecting pipe (31).

6. A check structure suitable for front and rear installation of a water meter according to claim 2, characterized in that The check assembly (22) comprises a check valve core (221), a valve flap (222) mounted on the check valve core, and a check spring (223) sleeved on the check valve core, wherein the check spring elastically pushes the check valve core (221) and drives the valve flap (222) to seal and close the water through hole (211) in the valve body (21).

7. A check structure suitable for front and rear installation of a water meter according to claim 6, characterized in that The valve body (21) is provided with a front guide hole (213), the valve cover tube (4) is provided with a rear guide hole (41), and both ends of the check valve core (221) are movably mounted in the front and rear guide holes, respectively.

8. A check structure suitable for front and rear installation of a water meter according to claim 6, characterized in that The rear end of the check spring (223) is mounted on a spring seat (224) that is fixed in position, and the front end of the check spring (223) elastically pushes against the outer shoulder of the check valve core (221).

9. A check structure suitable for front and rear installation of a water meter according to claim 6, characterized in that A circle of sealing bosses (212) is provided on the edge of the water hole (211), and the valve flap (222) contacts the sealing bosses (212) to seal and close the water hole (211).

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