Welded stainless steel check valve

Abstract

The utility model discloses a welding type stainless steel check valve which comprises a first valve body assembly and a second valve body assembly which are detachably connected, the first valve body assembly comprises a water inlet side valve body and an internal thread sleeve, the second valve body assembly comprises a water outlet side valve body and an external thread sleeve, the water inlet side valve body is fixedly welded with the internal thread sleeve, and the external thread sleeve is fixedly welded with the water outlet side valve body. The water outlet side valve body is welded and fixed with the external thread sleeve; the second valve body assembly is provided with a valve cavity, a flow adjusting structure is arranged in the valve cavity and comprises a valve element, an elastic piece and a valve clack assembly fixedly arranged on the valve element, the first valve body assembly and the second valve body assembly are provided with a plurality of guide seats, and each guide seat comprises a fixed part and a sliding part. The guide seat is fixedly welded to the water inlet side valve body and the water outlet side valve body through the fixing part, a sliding hole is formed in the sliding part, the valve element penetrates through the sliding hole in a guiding mode, and the elastic piece always has the movement trend of driving the valve clack assembly to be in sealing fit with the water inlet end of the valve cavity. The device has the effects of being stable in structure, easy to disassemble and better in water tightness.

Description

Technical Field

[0001] The utility model relates to the technical field of water pipe valves, in particular to a welded stainless steel check valve. Background Art

[0002] Water meters are used in every household life. As an instrument for measuring water flow, water meters mostly measure the cumulative flow of water. They are generally divided into two types: volumetric water meters and velocity water meters. Originated in the UK, the development of water meters has a history of nearly two hundred years. When choosing the specifications of a water meter, you should first estimate the size and range of the flow rate usually used, and then choose the water meter with the specification that is closest to the commonly used flow rate as the first choice. In order to facilitate the installation and maintenance of water meters, a check valve is usually installed at the water inlet end of the water meter. However, the check valves used in general water meters on the market are assembled between the upper valve body and the lower valve body by integral welding. As a result, it is troublesome to replace the internal parts of the check valve after it is damaged. Usually, only a new check valve can be replaced as a whole, resulting in increased maintenance costs. In addition, a flow regulating structure is provided in the valve cavity of the traditional check valve. However, since the traditional check valve is composed of only an upper valve body and a lower valve body, the installation flexibility of the flow regulating structure is poor. Usually, the upper valve body and the lower valve body can only be formed separately at one time, and then the flow regulating structure is installed between the upper valve body and the lower valve body. This will result in insufficient installation accuracy of the flow regulating structure, which may easily lead to poor water sealing during use, which urgently needs to be improved. Utility Model Content

[0003] The utility model aims to provide a welded stainless steel check valve, which has the effects of stable structure, easy disassembly and better water sealing performance.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions: a welded stainless steel check valve, comprising a first valve body assembly and a second valve body assembly that are detachably connected, the first valve body assembly comprising an inlet side valve body and an internally threaded sleeve, the second valve body assembly comprising an outlet side valve body and an externally threaded sleeve, the inlet side valve body is welded and fixed to the internally threaded sleeve, and the outlet side valve body is welded and fixed to the externally threaded sleeve;

[0005] The second valve body assembly is provided with a valve cavity, and a flow regulating structure is provided in the valve cavity. The flow regulating structure includes a valve core, an elastic member and a valve flap assembly fixed on the valve core. The first valve body assembly and the second valve body assembly are provided with a plurality of guide seats, and the guide seats include a fixed portion and a sliding portion. The guide seats are welded and fixed to the water inlet side valve body and the water outlet side valve body through the fixed portion. The sliding portion is provided with a sliding hole, and the valve core guide is penetrated through the sliding hole. The elastic member always has a movement tendency to drive the valve flap assembly to seal and cooperate with the water inlet end of the valve cavity.

[0006] By adopting the above technical scheme, during production and assembly, the guide seat can be first welded to the corresponding water inlet side valve body and water outlet side valve body, and then the water inlet side valve body and the internal threaded sleeve are welded and fixed to form a first valve body assembly, and at the same time, the water blowing side valve body and the external threaded sleeve are welded and fixed to form a second valve body assembly, and then the valve core is inserted into the sliding hole of the corresponding guide seat, and the elastic member is installed between the valve core and the guide seat, and finally the overall assembly is completed by fixing the first valve body assembly and the second valve body assembly, and the detachability of the first valve body assembly and the second valve body assembly can be used to make it more convenient The check valve can be disassembled and the parts can be replaced easily. At the same time, the welding between the valve body and the external threaded sleeve on the water outlet side and the welding between the valve body and the internal threaded sleeve on the water inlet side can be used to flexibly install the guide seat welding. At the same time, the utility model makes the timing selection of the guide seat welding more flexible by welding the guide seat, thereby improving the installation accuracy of the valve flap assembly, and then improving the consistency of the moving direction of the valve flap assembly in the valve cavity, so that the sealing between the valve flap assembly and the valve cavity is better when the check valve is in the closed state, and has the effects of stable structure, easy disassembly and better water sealing.

[0007] The utility model is further configured as follows: the water inlet side valve body, the internal threaded sleeve, the water outlet side valve body and the external threaded sleeve are all made of stainless steel.

[0008] By adopting the above technical scheme, unlike the high production cost of practical brass or copper alloys on the market, the utility model adopts stainless steel for production and manufacturing, which can reduce the heavy metal pollution generated in the traditional use of copper materials and is conducive to a green and environmentally friendly production process. At the same time, stainless steel has good anti-rust performance and is cheaper than copper, making it a more ideal copper substitute.

[0009] The utility model is further configured as follows: the water inlet side valve body is provided with an external thread, the water outlet side valve body is provided with an internal thread, and the internal thread is threadably matched with the corresponding external thread.

[0010] By adopting the above technical solution, the water inlet side valve body and the water outlet side valve body are detachably connected by means of a threaded connection. At the same time, the threaded connection can improve the connection firmness between the first valve body assembly and the second valve body assembly, and the connection method is practical and convenient.

[0011] The utility model is further configured as follows: a limiting portion is extended from the outer wall of the water inlet side valve body, and when the water inlet side valve body and the water outlet side valve body are threadedly engaged in place, the limiting portion and the water outlet side valve body are limited and stopped.

[0012] By adopting the above technical solution and adding the limit part, it is possible to effectively prevent the thread from being stripped due to over-tightening during the threaded connection between the water inlet side valve body and the water outlet side valve body.

[0013] The utility model is further configured as follows: two guide seats are provided, one of which is welded and fixed to the water inlet side valve body, and the other of which is welded and fixed to the water outlet side valve body.

[0014] By adopting the above technical solution, a plurality of guide seats can improve the consistency of the sliding direction of the valve core in the valve cavity, thereby improving the smoothness of the operation of the utility model.

[0015] The utility model is further configured as follows: the valve flap assembly comprises a mounting seat and an annular sealing gasket fixedly connected to the mounting seat, and the mounting seat is coaxially welded with the valve core.

[0016] By adopting the above technical solution, welding is used to improve the connection strength between the mounting seat and the valve core, thereby preventing the mounting seat and the valve core from being separated.

[0017] The utility model is further configured as follows: the mounting seat is provided with a mounting groove in an annular direction, the mounting groove makes the cross section of the mounting seat present an I-shape, and the annular sealing gasket is embedded in the mounting groove.

[0018] The utility model is further configured as follows: a stopper portion is radially extended from the valve core, one end of the stopper portion cooperates with a stopper of the mounting seat, and the other end of the stopper portion cooperates with a stopper of the guide seat.

[0019] By adopting the above technical solution and adding the stopper, it is possible to effectively prevent the valve core from accidentally detaching from the sliding hole of the guide seat during the process of adjusting the water flow rate of the valve flap assembly.

[0020] The utility model is further configured as follows: the internal threaded sleeve is provided with a first stop step in an annular direction, the side wall of the water inlet valve body is extended with a first clamping portion, and the first stop step is stop-matched with the first clamping portion.

[0021] By adopting the above technical solution, the first stop step facilitates accurate positioning of the water inlet side valve body on the internal threaded sleeve before welding, thereby improving the welding accuracy between the water inlet side valve body and the internal threaded sleeve.

[0022] The utility model is further configured as follows: the outlet side valve body is circumferentially provided with a second stop step, the side wall of the external threaded sleeve is extended with a second clamping portion, and the second stop step is stop-matched with the second clamping portion.

[0023] By adopting the above technical solution, the second stopper can be adjusted conveniently before welding, which is beneficial to the accurate positioning of the external threaded sleeve on the water outlet side valve body, thereby improving the welding accuracy between the external threaded sleeve and the water outlet side valve body.

[0024] In summary, the utility model has the following beneficial effects:

[0025] 1. The first valve body assembly is formed by welding the water inlet side valve body and the internal threaded sleeve, and the second valve body assembly is formed by welding the water outlet side valve body and the external threaded sleeve. A guide seat is welded to the inner wall of the water inlet side valve body and the water outlet side valve body respectively, the mounting seat is coaxially welded to the valve core, and then the annular sealing gasket is installed on the mounting seat to form a flow regulating structure. Finally, the first valve body assembly and the second valve body assembly are threadedly connected, so that the flow regulating structure is assembled into the valve cavity of the second valve body, which has the effects of stable structure, easy disassembly and better water sealing.

[0026] 2. The materials of the water inlet side valve body, the internal threaded sleeve, the water outlet side valve body and the external threaded sleeve are all made of stainless steel. Different from the high production cost of practical brass or copper alloys on the market, the utility model adopts stainless steel for production and manufacturing, which can reduce the heavy metal pollution generated in the traditional use of copper materials, and is conducive to a green and environmentally friendly production process. At the same time, stainless steel has good anti-rust performance and is cheaper than copper, making it a more ideal copper substitute. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the utility model.

[0028] Figure 2 It is a front view of the utility model.

[0029] Figure 3 This utility model Figure 2 Cross-sectional view of section AA.

[0030] Figure 4 This utility model Figure 3 A partial enlarged view of area B in the middle.

[0031] Figure 5 This utility model Figure 3 A partial enlarged view of the middle C area.

[0032] In the figure: 1. internal thread sleeve; 11. first stop step; 2. valve body on the water inlet side; 2a. external thread; 21. first clamping part; 22. limiting part; 3. valve body on the water outlet side; 3a. valve cavity; 3b. internal thread; 31. second stop step; 4. external thread sleeve; 41. second clamping part; 5. guide seat; 501. sliding part; 501a. sliding hole; 502. fixing part; 6. valve core; 61. stop part; 7. valve disc assembly; 701. mounting seat; 701a. mounting groove; 702. annular sealing gasket; 8. elastic member. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings.

[0034] A welded stainless steel check valve, such as Figure 1-3 As shown, it includes a first valve body assembly and a second valve body assembly that are detachably connected, the first valve body assembly includes an inlet side valve body 2 and an internal threaded sleeve 1, the second valve body assembly includes an outlet side valve body 3 and an external threaded sleeve 4, the inlet side valve body 2 is welded and fixed to the internal threaded sleeve 1, and the outlet side valve body 3 is welded and fixed to the external threaded sleeve 4; the second valve body assembly is provided with a valve cavity 3a, and a flow regulating structure is provided in the valve cavity 3a, the flow regulating structure includes a valve core 6, an elastic member 8 and a valve flap assembly 7 fixedly arranged on the valve core 6, the first valve body assembly and the second valve body assembly are provided with a plurality of guide seats 5, the guide seats 5 include a fixing portion 502 and a sliding portion 501, and the guide seats 5 are connected to the inlet side valve body 2 and the outlet side valve body 3 through the fixing portion 502 The body 3 is welded and fixed, the sliding part 501 is provided with a sliding hole 501a, the valve core 6 is guided and penetrated in the sliding hole 501a, and the elastic member 8 always has a movement tendency to drive the valve flap assembly 7 to seal with the water inlet end of the valve cavity 3a; the water inlet side valve body 2, the internal threaded sleeve 1, the water outlet side valve body 3 and the external threaded sleeve 4 are all made of stainless steel. Different from the high production cost of practical brass or copper alloy on the market, the utility model adopts stainless steel for production and manufacturing, which can reduce the heavy metal pollution generated in the traditional process of using copper materials, and is conducive to a green and environmentally friendly production process. At the same time, stainless steel has good anti-rust performance and its cost is lower than that of copper materials, making it a more ideal copper substitute material.

[0035] like Figure 3As shown, the water inlet side valve body 2 is provided with an external thread 2a, and the water outlet side valve body 3 is provided with an internal thread 3b, and the internal thread 3b is threadedly matched with the external thread 2a. The water inlet side valve body 2 and the water outlet side valve body 3 are detachably connected by means of a threaded connection. At the same time, the threaded connection method can improve the connection firmness between the first valve body assembly and the second valve body assembly, and has the effect of a practical and convenient connection method; a limiting portion 22 is extended from the outer wall of the water inlet side valve body 2. When the water inlet side valve body 2 and the water outlet side valve body 3 are threadedly matched in place, the limiting portion 22 and the water outlet side valve body 3 are limited and stopped. The addition of the limiting portion 22 can effectively prevent the situation where the water inlet side valve body 2 and the water outlet side valve body 3 are over-tightened and cause thread slippage when the threaded connection between the water inlet side valve body 2 and the water outlet side valve body 3 is connected; two guide seats 5 are provided, one guide seat 5 is welded and fixed on the water inlet side valve body 2, and the other guide seat 5 is welded and fixed on the water outlet side valve body 3. Multiple guide seats 5 can improve the valve core 6 in The direction of sliding in the valve cavity 3a is consistent, thereby improving the smoothness of the operation of the utility model; the valve flap assembly 7 includes a mounting seat 701 and an annular sealing gasket 702 fixedly connected to the mounting seat 701, the mounting seat 701 is coaxially welded with the valve core 6, and the welding method is used to improve the connection strength between the mounting seat 701 and the valve core 6 to prevent the mounting seat 701 from detaching from the valve core 6; the mounting seat 701 is circumferentially provided with a mounting groove 701a, the mounting groove 701a makes the cross-section of the mounting seat 701 present an "I" shape, and the annular sealing gasket 702 is embedded in the mounting groove 701a; the valve core 6 is radially extended with a stopper 61, one end of the stopper 61 cooperates with the stopper of the mounting seat 701, and the other end of the stopper 61 cooperates with a stopper of a guide seat 5. The addition of the stopper 61 can effectively prevent the valve flap assembly 7 from accidentally detaching the valve core 6 from the sliding hole 501a of the guide seat 5 during the process of adjusting the water flow.

[0036] like Figure 4-5 As shown, the internal threaded sleeve 1 is circumferentially provided with a first stop step 11, and the side wall of the water inlet side valve body 2 is extended with a first clamping portion 21, the first stop step 11 and the first clamping portion 21 stop cooperation, the first stop step 11 is convenient for positioning the water inlet side valve body 2 on the internal threaded sleeve 1 before welding, and improves the welding accuracy between the water inlet side valve body 2 and the internal threaded sleeve 1; the water outlet side valve body 3 is circumferentially provided with a second stop step 31, and the side wall of the external threaded sleeve 4 is extended with a second clamping portion 41, the second stop step 31 and the second clamping portion 41 stop cooperation, the second stop adjustment is convenient for positioning the external threaded sleeve 4 on the water outlet side valve body 3 before welding, and improves the welding accuracy between the external threaded sleeve 4 and the water outlet side valve body 3.

[0037] The basic working principle of the utility model is as follows: during production and assembly, the guide seat 5 can be first welded to the corresponding water inlet side valve body 2 and water outlet side valve body 3, and then the water inlet side valve body 2 and the internal threaded sleeve 1 are welded and fixed to form a first valve body assembly, and at the same time, the water blowing side valve body and the external threaded sleeve 4 are welded and fixed to form a second valve body assembly, and then the valve core 6 is inserted into the sliding hole 501a corresponding to the guide seat 5, and the elastic member 8 is installed between the valve core 6 and the guide seat 5, and finally the first valve body assembly and the second valve body assembly are fixedly connected to complete the overall assembly, and the detachability of the first valve body assembly and the second valve body assembly can be utilized to better The check valve can be easily disassembled and its parts can be replaced. At the same time, the guide seat 5 can be flexibly installed by welding the valve body 3 and the external threaded sleeve 4 on the water outlet side and the valve body 2 and the internal threaded sleeve 1 on the water inlet side. At the same time, the utility model makes the timing of welding the guide seat 5 more flexible by welding the guide seat 5, thereby improving the installation accuracy of the valve flap assembly 7, and then improving the consistency of the moving direction of the valve flap assembly 7 in the valve cavity 3a, so that the sealing between the valve flap assembly 7 and the valve cavity 3a is better when the check valve is in the closed state, and has the effects of stable structure, easy disassembly and better water sealing.

[0038] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A welded stainless steel check valve, characterized in that: It comprises a first valve body assembly and a second valve body assembly which are detachably connected, the first valve body assembly comprising a water inlet side valve body (2) and an internally threaded sleeve (1), the second valve body assembly comprising a water outlet side valve body (3) and an externally threaded sleeve (4), the water inlet side valve body (2) and the internally threaded sleeve (1) are fixed by welding, and the water outlet side valve body (3) and the externally threaded sleeve (4) are fixed by welding; The second valve body assembly is provided with a valve cavity (3a), and a flow regulating structure is provided in the valve cavity (3a). The flow regulating structure comprises a valve core (6), an elastic member (8) and a valve flap assembly (7) fixed on the valve core (6). The first valve body assembly and the second valve body assembly are provided with a plurality of guide seats (5). The guide seats (5) comprise a fixed portion (502) and a sliding portion (501). The guide seats (5) are welded and fixed to the water inlet side valve body (2) and the water outlet side valve body (3) through the fixed portion (502). The sliding portion (501) is provided with a sliding hole (501a). The valve core (6) is guided and penetrated through the sliding hole (501a). The elastic member (8) always has a movement tendency to drive the valve flap assembly (7) to seal and cooperate with the water inlet end of the valve cavity (3a).

2. A welded stainless steel check valve according to claim 1, characterized in that: The water inlet valve body (2), the internal threaded sleeve (1), the water outlet valve body (3) and the external threaded sleeve (4) are all made of stainless steel.

3. A welded stainless steel check valve according to claim 1, characterized in that: The water inlet valve body (2) is provided with an external thread (2a), and the water outlet valve body (3) is provided with an internal thread (3b), and the internal thread (3b) is threadably matched with the corresponding external thread (2a).

4. A welded stainless steel check valve according to claim 3, characterized in that: The outer wall of the water inlet side valve body (2) is extended with a limiting portion (22), and when the water inlet side valve body (2) and the water outlet side valve body (3) are threadedly engaged with each other, the limiting portion (22) and the water outlet side valve body (3) are in a limiting stop.

5. A welded stainless steel check valve according to claim 1, characterized in that: Two guide seats (5) are provided, one guide seat (5) is welded and fixed on the water inlet side valve body (2), and the other guide seat (5) is welded and fixed on the water outlet side valve body (3).

6. A welded stainless steel check valve according to claim 1, characterized in that: The valve flap assembly (7) comprises a mounting seat (701) and an annular sealing gasket (702) fixedly connected to the mounting seat (701); the mounting seat (701) is coaxially welded to the valve core (6).

7. A welded stainless steel check valve according to claim 6, characterized in that: The mounting seat (701) is provided with a mounting groove (701a) in an annular direction, and the mounting groove (701a) makes the cross section of the mounting seat (701) present an "I" shape, and the annular sealing gasket (702) is embedded in the mounting groove (701a).

8. A welded stainless steel check valve according to claim 6, characterized in that: The valve core (6) is radially extended with a stop portion (61), one end of the stop portion (61) is stop-matched with the mounting seat (701), and the other end of the stop portion (61) is stop-matched with a guide seat (5).

9. A welded stainless steel check valve according to claim 1, characterized in that: The internal threaded sleeve (1) is provided with a first stop step (11) in an annular direction, and a first clamping portion (21) is extended from the side wall of the water inlet side valve body (2), and the first stop step (11) is stop-matched with the first clamping portion (21).

10. A welded stainless steel check valve according to claim 1, characterized in that: The outlet side valve body (3) is provided with a second stop step (31) in an annular direction, and the side wall of the external threaded sleeve (4) is extended with a second clamping portion (41), and the second stop step (31) is stop-matched with the second clamping portion (41).

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