Combined valve with non-return function and system integration package of meter box

Abstract

The utility model discloses a combination valve with check function, including valve body, check subassembly and be used for make pipeline open or close and cut -off valve subassembly, the valve body has water inlet end and water outlet end, cut -off valve subassembly installs in the valve body, check subassembly installs in water inlet end, to make fluid from water inlet end one -way flow to water outlet end. The utility model discloses check subassembly installs in water inlet end, when practical application, this water inlet end can be directly connected with the rear end of water meter, can effectively avoid the reverse rotation of water meter. In addition, check subassembly and stop valve subassembly are integrated in combination valve simultaneously, not only can shorten total length, but also can reduce leakage point.

Description

Technical Field

[0001] This utility model relates to the field of water technology, and in particular to a combination valve with a check valve function and a meter box system integration package having the above-mentioned combination valve. Background Technology

[0002] Water meters in household meter boxes are typically affected by fluctuations in the municipal water supply network pressure. When the municipal network pressure increases, the water pressure before the meter also increases. At this time, a small amount of water may pass through the meter, causing it to run dry, resulting in inaccurate readings and shortening its lifespan. Conversely, when the municipal network pressure decreases, the water pressure before the meter also decreases, allowing a small amount of water to flow backward through the meter, causing it to reverse.

[0003] In the prior art, household meter box systems typically include a water meter, a shut-off valve, and a combination valve that simultaneously functions as a shut-off and check valve. The combination valve, water meter, and shut-off valve are installed sequentially along the water flow direction and from front to back. The combination valve includes a shut-off component and a check valve component. The combination valve is typically installed upstream of the water meter, and the check valve component is located at the outlet end of the combination valve.

[0004] Existing household meter box systems can effectively solve the problem of water meters spinning idly, but they cannot solve the problem of water meters reversing.

[0005] In addition, the combination valve also includes a valve body (made of copper or stainless steel) and a valve cover (made of copper or stainless steel) located at the outlet end. The shut-off component is installed in the valve body, and the check component is installed in the valve cover. The check component typically includes a sealing part, a connecting rod, and a guide part with a guide hole. The sealing part is fixed to the front end of the connecting rod, and the connecting rod can be movably inserted through the guide hole. In the prior art, the guide part is integrally formed and fixed in the valve cover by precision machining. Although this structure has high reliability, it is difficult to process, has low processing accuracy, and has high cost, resulting in weak product competitiveness. Utility Model Content

[0006] The purpose of this invention is to overcome the problem of water meter reversal in the existing technology.

[0007] The first aspect of this utility model provides a combination valve with a check function, including a valve body, a check assembly, and a shut-off valve assembly for opening or closing a pipeline. The valve body has an inlet end and an outlet end. The shut-off valve assembly is installed in the valve body, and the check assembly is installed at the inlet end, so that fluid flows unidirectionally from the inlet end to the outlet end.

[0008] In the recommended embodiment, the water inlet end is provided with a water inlet connector, which has a sealing surface. The space between the sealing surface and the shut-off valve assembly forms a check valve cavity. The check valve assembly is installed in the check valve cavity and includes a seal that allows axial movement within the check valve cavity and a guide for guiding the seal. The seal can seal against the sealing surface. The guide ensures axial movement of the seal, thereby guaranteeing a good sealing effect between the seal and the sealing surface.

[0009] In the recommended embodiment, the guide element is detachably installed within the check valve cavity. The guide element is manufactured separately as an independent component, resulting in lower processing difficulty and higher processing accuracy compared to existing precision machining methods.

[0010] In the recommended embodiment, the guide is made of plastic. Using plastic for the guide significantly reduces costs.

[0011] In the recommended embodiment, the sealing element includes a sealing portion and a connecting rod. The sealing portion is capable of sealingly engaging with a sealing surface. The guide element is positioned and installed within the check valve cavity, and has a guide hole. The connecting rod passes through the guide hole. The connecting rod engages with the guide hole to guide the sealing element.

[0012] In the recommended embodiment, the guide includes a first guide body, which comprises an annular portion, at least one support rod, and a guide ring. The guide ring is located in the middle of the annular portion, and a guide hole is formed within the guide ring. Both ends of the support rod are fixed to the guide ring and the annular portion, respectively. In this structure, only the guide ring and support rod are located within the flow channel, minimizing flow resistance.

[0013] In a recommended embodiment, the guide further includes a second guide body comprising at least two guide rods, each extending axially and fixed to the annular portion at intervals from each other; the guide rods surround the sealing portion and provide guidance for the sealing portion. The arrangement of the guide rods can further improve the guiding effect.

[0014] In the recommended embodiment, the check valve assembly further includes a return spring, which is sleeved on the connecting rod, with its two ends abutting against the seal and the guide ring, respectively. The return spring not only allows the seal to automatically reset, but also provides cushioning and reduces noise.

[0015] In the recommended embodiment, one end of the water inlet connector is fixedly connected to the valve body, and the other end of the water inlet connector is provided with a union nut. Considering that most water meters on the market currently use external threaded connectors, the union nut can be directly connected to the water meter.

[0016] In the recommended implementation, the shut-off valve assembly is one of a ball valve assembly, a gate valve assembly, or a stop valve assembly.

[0017] In the recommended embodiment, the outlet end of the valve body forms an outlet connector, wherein: the valve body and the outlet connector are integrally formed, and the inlet connector is detachably fixed to the valve body; or the valve body, the inlet connector, and the outlet connector are integrally formed. Integrating the valve body with at least the outlet connector not only makes the product more compact but also reduces leakage points.

[0018] The second aspect of this utility model provides a meter box system integration package, which, along the fluid flow direction, includes a pre-meter combination valve, a water meter, and the aforementioned combination valve connected in sequence. The pre-meter combination valve includes a pre-meter valve body, a pre-meter check valve assembly, and a pre-meter shut-off valve assembly for opening or closing the pipeline. The pre-meter shut-off valve assembly is installed in the pre-meter valve body. The two ends of the pre-meter valve body respectively form a pre-meter inlet and a pre-meter outlet. The pre-meter check valve assembly is installed in the pre-meter outlet to allow fluid to flow unidirectionally from the pre-meter inlet to the pre-meter outlet. The pre-meter outlet is connected to the front end of the water meter, and the inlet is connected to the rear end of the water meter. In the above-mentioned meter box system integration package, the front and rear ends of the water meter are respectively provided with a pre-meter check valve assembly and a check valve assembly, which can not only prevent the water meter from running dry but also prevent the water meter from reversing.

[0019] The beneficial effects of this invention are as follows: The check valve assembly is installed at the water inlet end. In practical applications, this water inlet end can be directly connected to the rear end of the water meter, effectively preventing the water meter from reversing. Furthermore, the check valve assembly and the shut-off valve assembly are integrated into the combined valve, which not only shortens the overall length but also reduces leakage points. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a cross-sectional structural diagram of Example 1.

[0022] Figure 3 This is a three-dimensional structural diagram of the guide component in Embodiment 1.

[0023] Figure 4 This is a schematic diagram of the sealing element.

[0024] Figure 5 This is a structural diagram of the meter box system integration package.

[0025] Figure 6 This is a cross-sectional structural diagram of Example 2.

[0026] Explanation of reference numerals in the attached drawings: Valve body 1, Positioning ring 10, Outlet connector 11, Inlet connector 12, Union nut 13, Check valve chamber 100, Sealing surface 120, Check assembly 2, Seal 21, Sealing part 211, Connecting rod 212, Sealing gasket 2110, Guide 22, Guide 22′, Guide hole 200, Guide rod 220, Circular part 221, Support rod 222, Guide ring 223, Shut-off valve assembly 3, Return spring 4, Pre-meter combination valve 5, Pre-meter valve body 51, Pre-meter check assembly 52, Pre-meter shut-off valve assembly 53, Water meter 6, Retaining ring 7. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] Example 1 Reference Figure 1 and Figure 2 A combination valve with a check valve function includes a valve body 1, a check valve assembly 2, and a shut-off valve assembly 3 for opening or closing the pipeline. The shut-off valve assembly 3 is installed inside the valve body 1. This embodiment uses a gate valve as an example for illustration. Of course, it can also be a ball valve, a gate valve, or other water valves with shut-off function.

[0032] One end of the valve body 1 is provided with a water outlet connector 11, which is integrally formed with the valve body 1. The other end of the valve body 1 forms a water inlet end, which in this embodiment is provided with a water inlet connector 12, which is detachably installed on the valve body 1. As can be seen from the figure, one end of the water inlet connector 12 is fixedly connected to the valve body 1, and the other end of the water inlet connector 12 is provided with a union nut 13 (which can be used to directly connect to a water meter). The water inlet connector 12 is provided with a sealing surface 120 surrounding the inner wall of the water inlet connector 12. To ensure a better sealing effect, the outer ring of the sealing surface 120 is provided with a raised sealing water line (not shown in the figure).

[0033] The space between the sealing surface 120 and the shut-off valve assembly 3 forms a check valve cavity 100. The check assembly 2 is installed in the check valve cavity 100. The check assembly 2 includes a seal 21 that can move axially along the check valve cavity 100 and a guide 22 for guiding the seal 21. The seal 21 can seal with the sealing surface 120.

[0034] Reference Figure 4 The sealing element 21 includes a sealing part 211 and a connecting rod 212. The sealing part 211 can seal with the sealing surface 120. The sealing part 211 is circular, and its front end is provided with a sealing gasket 2110 for sealing with the sealing surface 120. One end of the connecting rod 212 is fixed to the rear end of the sealing part 211, and the other end of the connecting rod 212 forms a free end.

[0035] Reference Figure 3In this embodiment, the guide member 22 is typically made of plastic. The guide member 22 includes a first guide body and a second guide body. The first guide body is installed radially and includes an annular portion 221, two support rods 222, and a guide ring 223. The guide ring 223 is located in the middle of the annular portion 221, and a guide hole 200 is formed within the guide ring 223. A connecting rod 212 passes through the guide hole 200 and can cooperate with the guide hole 200 to provide guidance for the seal 21. The two ends of the support rods 222 are respectively fixed to the guide ring 223 and the annular portion 221. In this embodiment, the second guide body consists of three guide rods 220, each extending axially and fixed to the annular portion 221 at intervals. The guide rods 220 surround the sealing portion 211 and also provide guidance for the sealing portion 211. As can be seen from the figure, the guide 22 is detachably installed in the check valve cavity 100, and the guide 22 is limited and installed in the check valve cavity 100. Specifically, the valve body 1 has a positioning ring 10 on the side facing the water inlet connector 12, the free end of the guide rod 220 is pressed against the outer edge of the sealing surface 120, and the ring part 221 is pressed against the positioning ring 10.

[0036] As shown in the figure, the check valve assembly 2 also includes a return spring 4, which is sleeved on the connecting rod 212, and its two ends abut against the sealing part 211 and the guide ring 223, respectively. The return spring 4 not only enables the seal 21 to automatically return to its original position, but also provides cushioning and reduces noise.

[0037] When the pressure at the inlet is high, water can flow forward from the inlet connector 12, pushing the seal 21 backward. At this time, the check valve 2 opens, and water can flow from the inlet connector 12 to the outlet connector 11. When the pressure at the outlet is high, the water flows in the opposite direction, pushing the seal 21 forward. At this time, the check valve 2 closes, and water cannot flow from the outlet connector 11 to the inlet connector 12.

[0038] Simultaneously refer to Figure 5The meter box system integration package, as shown in the figure, along the fluid flow direction, includes a pre-meter combination valve 5, a water meter 6, and the aforementioned combination valve connected in sequence. The pre-meter combination valve 5 is installed at the front end of the water meter 6, and the aforementioned combination valve is installed at the rear end of the water meter 6. During normal operation, the fluid flows from the pre-meter combination valve 5 to the water meter 6, and then from the water meter 6 to the aforementioned combination valve. The pre-meter combination valve 5 includes a pre-meter valve body 51, a pre-meter check valve assembly 52, and a pre-meter shut-off valve assembly 53 for opening or closing the pipeline. The pre-meter shut-off valve assembly 53 is installed inside the pre-meter valve body 51. The two ends of the pre-meter valve body 51 form a pre-meter water inlet and a pre-meter water outlet, respectively. The pre-meter check valve assembly 52 is installed at the pre-meter water outlet to allow the fluid to flow unidirectionally from the pre-meter water inlet to the pre-meter water outlet. The pre-meter water outlet is connected to the front end of the water meter 6, and the water inlet connector 12 is connected to the rear end of the water meter 6. In the aforementioned meter box system integration package, the front end and rear end of the water meter 6 are respectively equipped with a front check component 52 and a check component 2, which can not only prevent the water meter 6 from running dry, but also prevent the water meter from reversing.

[0039] Example 2 Reference Figure 6 The structure of this second embodiment is basically the same as that of the first embodiment. The main difference is that in this second embodiment, the guide 22' only includes the first guide body. The guide 22' is limited between the positioning ring 10 and the retaining ring 7 of the valve body 1, and the connecting rod 212 of the sealing member is guided and engaged with the guide hole (not shown in the figure).

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A combination valve with a check valve function, characterized in that: The device includes a valve body (1), a check valve assembly (2), and a shut-off valve assembly (3) for opening or closing the pipeline. The valve body (1) has an inlet end and an outlet end. The shut-off valve assembly (3) is installed inside the valve body (1). The check valve assembly (2) is installed at the inlet end so that fluid flows unidirectionally from the inlet end to the outlet end.

2. The combined valve according to claim 1, characterized in that: The water inlet end is provided with a water inlet connector (12), and the water inlet connector (12) is provided with a sealing surface (120). The space between the sealing surface (120) and the shut-off valve assembly (3) forms a check valve cavity (100). The check assembly (2) is installed in the check valve cavity (100). The check assembly (2) includes a seal (21) that can move along the axial direction of the check valve cavity and a guide (22) for guiding the seal (21). The seal (21) can seal with the sealing surface (120).

3. The combined valve according to claim 2, characterized in that: The guide (22) is detachably installed in the check valve cavity (100).

4. The combined valve according to claim 3, characterized in that: The guide component (22) is made of plastic.

5. The combined valve according to claim 3, characterized in that: The sealing element (21) includes a sealing part (211) and a connecting rod (212). The sealing part (211) can be sealed with the sealing surface (120). The guide (22) is limited and installed in the check valve cavity (100), and the guide (22) is provided with a guide hole (200). The connecting rod (212) passes through the guide hole (200).

6. The combined valve according to claim 5, characterized in that: The guide member (22) includes a first guide body, which includes an annular portion (221), at least one support rod (222), and a guide ring (223). The guide ring (223) is located in the middle of the annular portion (221), and the guide hole (200) is formed in the guide ring (223). The two ends of the support rod (222) are respectively fixed to the guide ring (223) and the annular portion (221).

7. The combined valve according to claim 6, characterized in that: The guide also includes a second guide body, which includes at least two guide rods (220), each of which extends axially and is fixed to the annular portion (221) at intervals; the guide rods (220) surround the sealing portion (211) and provide guidance for the sealing portion (211).

8. The combined valve according to claim 7, characterized in that: The check valve assembly (2) also includes a return spring (4), which is sleeved on the connecting rod (212), and the two ends of the return spring (4) abut against the sealing part (211) and the guide ring (223) respectively.

9. The combined valve according to claim 2, characterized in that: One end of the water inlet connector (12) is fixedly connected to the valve body (1), and the other end of the water inlet connector (12) is provided with a union nut (13).

10. The combined valve according to claim 1, characterized in that: The shut-off valve assembly (3) is one of a ball valve assembly, a gate valve assembly, or a stop valve assembly.

11. The combined valve according to claim 2, characterized in that: The outlet end of the valve body (1) forms an outlet connector (11), wherein: The valve body (1) and the water outlet connector (11) are integrally formed, and the water inlet connector (12) is detachably fixed to the valve body (1); or the valve body (1), the water inlet connector (12) and the water outlet connector (11) are integrally formed.

12. A meter box system integration package, characterized in that: Along the flow direction of the fluid, the system includes a pre-meter combination valve (5), a water meter (6), and a combination valve as described in any one of claims 1-11, connected in sequence. The pre-meter combination valve (5) includes a pre-meter valve body (51), a pre-meter check valve assembly (52), and a pre-meter shut-off valve assembly (53) for opening or closing the pipeline. The pre-meter shut-off valve assembly (53) is installed inside the pre-meter valve body (51). The two ends of the pre-meter valve body (51) form a pre-meter inlet and a pre-meter outlet, respectively. The pre-meter check valve assembly (52) is installed at the pre-meter outlet and is used to allow the fluid to flow unidirectionally from the pre-meter inlet to the pre-meter outlet. The pre-meter outlet is connected to the front end of the water meter (6), and the inlet is connected to the rear end of the water meter (6).

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