Valve connecting structure

Abstract

The utility model discloses a valve connecting structure which comprises a first valve and a second valve. One side of the first valve is provided with a first connector, and one side of the second valve is provided with a second connector. And the first joint is directly communicated with the second joint. When the valve connecting structure is installed, the first valve and the second valve do not need to be communicated through a nipple connector, the first connector of the first valve and the second connector of the second valve are directly communicated in a butt joint mode, and therefore the installation process of the valves can be greatly simplified, and the installation efficiency is improved. And moreover, leakage points in the valve connecting structure are reduced, and the leakage risk is small.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical connection, in particular to a valve connection structure capable of direct connection. Background Art

[0002] In the water supply industry, in the water meter box at the front end of entering a household, a plurality of valves (including ball valves, gate valves, pressure reducing valves, etc.) are usually installed on the front side and the rear side of the water meter. Existing valves are often connected to pipelines by means of threaded connections. When two valves need to be connected in series, a nipple joint as shown in Figure 1 is usually required for connection. As shown in Figure 1 A wrench portion protrudes in the middle of the nipple joint, and external threads are respectively formed at both ends of the nipple joint.

[0003] During actual assembly, both ends of the nipple joint are successively threadedly connected to two valves.

[0004] Although the above structure is relatively mature, it has the following technical problems:

[0005] First, the installation is cumbersome. First of all, in order to ensure the sealing effect, during installation, it is usually necessary to wind sealing tape at the threaded connection. If the sealing tape is wound too thickly, docking cannot be achieved; if the sealing tape is wound too thinly, leakage is likely to occur. In addition, in order to ensure a tight fit, the above connection method must use installation tools such as wrenches during actual installation. When the installation space is limited, the operation difficulty is often increased, and the installation efficiency is greatly affected.

[0006] Second, the installation orientation is uncertain. During the rotary installation of the valves, when they are screwed tightly together, the orientation of the valves often deviates from the expected angle.

[0007] Third, the leakage risk is high. Both ends of the nipple joint are respectively connected to the valves on both sides, and there are two leakage points, so the leakage risk is relatively high. Content of the Utility Model

[0008] The utility model provides a valve connection structure, aiming at overcoming the problem of high leakage risk existing in the prior art during the assembly process.

[0009] To achieve this purpose, the utility model adopts the following technical solutions:

[0010] A valve connection structure includes a first valve and a second valve. One side of the first valve has a first joint, and one side of the second valve has a second joint. Among them, the first joint and the second joint are directly connected.

[0011] In a recommended embodiment, the second joint is inserted into the first joint. The insertion connection method can, on the one hand, increase the overlapping area of the second joint and the first joint, reducing the leakage risk at the connection between the valves; on the other hand, it can also facilitate the rotation and adjustment of the valve orientation during installation, enabling the valve to be installed and fixed in the expected orientation.

[0012] In a recommended embodiment, the valve connection structure further includes a limiting component for axially limiting the first joint and the second joint. By further adding an axial limiting component on the basis of the insertion connection structure, dual radial and axial limiting of the valve connection structure can be achieved, ensuring the installation stability between the two valves.

[0013] In a recommended embodiment, the limiting component includes a pin, a jack, and a socket groove. The socket groove is formed on the outer surface of the second joint, and the jack is formed on the first joint. The jack and the socket groove are correspondingly arranged, and the pin passes through the jack and is limited in the socket groove. When installing the first valve and the second valve, only need to insert the second joint of the second valve into the first joint of the first valve, and then insert the pin into the jack to complete the fixed installation of the two valves, making the installation process more convenient.

[0014] In a recommended embodiment, the socket groove is an annular groove surrounding the second joint. During the process of the second joint extending into the first joint, the second joint can rotate arbitrarily by 360° around the central axis, so as to adjust the orientations of the first valve and the second valve to the expected orientations, and there is no need to align the jack and the socket groove during assembly. After the pin extends in, it can be in limiting cooperation with the socket groove, making the installation more convenient.

[0015] In a recommended embodiment, the socket groove is perpendicular to the central axis of the second joint. The socket groove perpendicular to the central axis of the second joint is more convenient for processing. Especially when the second joint is made of metal, the second joint with an annular socket groove can be directly manufactured by turning.

[0016] In a recommended embodiment, the jack is arranged along the tangential direction of the second joint. It is more convenient for the processing of the first joint and the second joint, and the pin can fall into the socket groove after being inserted into the jack.

[0017] In a recommended embodiment, the jack is a through hole or a blind hole. For a through hole, the pin can completely pass through the jack, which can increase the reliability of the valve connection structure; for a blind hole, the opening is only on the side where the pin is inserted, and the sealing performance is better.

[0018] In a recommended embodiment, the first joint includes a main body part and a convex seat, and the jack is opened in the convex seat. The setting of the convex seat can increase the length of the jack, thereby improving the reliability of the plug-in structure composed of the pin and the jack.

[0019] In a recommended embodiment, the end face of the convex seat is a plane, and the port of the jack is arranged on the end face of the convex seat. This facilitates positioning and the machining of the jack.

[0020] In a recommended embodiment, the latch is arranged in contact with the bottom surface of the insertion slot. After the latch is inserted, it can completely extend into the insertion slot and contact the inner surface of the insertion slot, thereby further improving the reliability of the limiting structure of the latch in the insertion slot and reducing the risk of the latch disengaging from the insertion slot.

[0021] In a recommended embodiment, one or more sealing rings are sleeved on the outer surface of the second joint. The sealing rings protrude from the outer surface of the second joint. The sealing rings at least include a first sealing ring arranged between the external connection end of the second joint and the insertion slot. When the second joint extends into the first joint for insertion, the sealing rings sleeved on the outer surface of the second joint are deformed by extrusion, so as to be pressed tightly between the inner surface of the first joint and the outer surface of the second joint. Moreover, the first sealing ring is closer to the external connection end of the second joint, so that the connection structure between the first joint and the second joint can be sealed, and the medium can be prevented from overflowing from the connection part of the first joint and the second joint.

[0022] In a recommended embodiment, the sealing ring further includes a second sealing ring, and the second sealing ring and the first sealing ring are respectively arranged on both sides of the insertion slot. The second sealing ring provides a second layer of protection for the seal between the second joint and the first joint, further enhancing the sealing effect. In addition, after the assembly is completed, the second sealing ring is closer to the external connection end of the first joint. It can balance the extrusion force of the first sealing ring on the inner surface of the first joint, thereby improving the bending resistance effect of the pipeline at the connection part and providing effective protection for the first sealing ring.

[0023] In a recommended embodiment, a step surface is provided at the junction of the first joint and the second joint. When the external connection end of the first joint or the second joint abuts against the step surface, the jack and the insertion slot are axially aligned. The setting of the above structure facilitates installation. When the second joint extends into the first joint and abuts against the step surface, the axial alignment of the jack and the limiting slot can be automatically realized.

[0024] In a recommended embodiment, the latch is a single latch corresponding to the jack one by one.

[0025] In a recommended embodiment, the single latch is in the shape of a straight rod.

[0026] In a recommended embodiment, the latch is a U-shaped latch.

[0027] In a recommended embodiment, the first valve and / or the second valve is a water service valve.

[0028] The beneficial effects of the present utility model:

[0029] When the valve connection structure provided by the present utility model is installed, there is no need to use a nipple joint to connect between the first valve and the second valve. Instead, the first joint of the first valve and the second joint of the second valve are directly butted and connected, which can greatly simplify the valve installation process and reduce the leakage points in the valve connection structure, with a small leakage risk. Description of the Drawings

[0030] Figure 1 It is a schematic diagram of the connection structure of the first valve and the second valve in the prior art.

[0031] Figure 2 It is a schematic diagram of the direct connection structure of the first valve and the second valve of the valve connection structure provided in the first embodiment of the present utility model.

[0032] Figure 3 It is a sectional view of the connection position of the first joint and the second joint of the valve connection structure provided in the second embodiment of the present utility model.

[0033] Figure 4 It is a schematic diagram of the direct connection structure of the first joint and the second joint in the third embodiment of the present utility model.

[0034] Figure 5 It is Figure 4 A schematic diagram of the structure of the A-A section in

[0035] Figure 6 It is Figure 4 A schematic diagram of the structure of the B-B section in

[0036] Figure 7 It is a schematic diagram of the second joint in the third embodiment of the present utility model.

[0037] Figures 8 - 10 It is a schematic diagram of the structures of three kinds of jacks provided in the third embodiment of the present utility model.

[0038] Figure 11 It is a schematic cross-sectional structure diagram of the plug inserted into the jack in the third embodiment of the present utility model.

[0039] Figure 12 It is a schematic diagram of the structure in the case where the plug is a U-shaped plug in the third embodiment of the present utility model.

[0040] Figures 13 - 15 It is a schematic diagram of the connection structure of the first joint and the second joint of the valve connection structure provided in the fourth embodiment of the present utility model.

[0041] Description of the reference numerals: 100 - first valve; 200 - second valve;

[0042] 1 - First joint; 11 - Convex seat; 12 - Main body; 2 - Second joint; 3 - Limit component; 31 - Plug; 311 - Insertion part; 312 - Extension part; 32 - Socket; 33 - Insertion slot; 4 - Sealing ring; 41 - First sealing ring; 42 - Second sealing ring; 5 - Step surface. Detailed implementation mode

[0043] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely for explaining the present utility model and not for limiting the present utility model. Additionally, it should be noted that for the sake of convenience in description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can include the direct contact between the first and second features, or can also include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for differentiation in description and do not have special meanings.

[0047] Embodiment 1

[0048] Figure 2 Shows a schematic structural diagram of the direct connection between the first valve and the second valve of the valve connection structure provided in Embodiment 1 of the present utility model. AsFigure 2 As shown in the figure, Embodiment 1 of the present utility model provides a valve connection structure, which includes a first valve 100 and a second valve 200. In this embodiment, the specific types and structures of the "first valve 100" and the "second valve 200" are not limited. As long as the valve has a joint for communicating with an external device, it can be applied to the valve connection structure provided by the present utility model.

[0049] For example, the first valve 100 and the second valve 200 can be water service valves such as gate valves, ball valves, globe valves, pressure reducing valves, check valves, butterfly valves, angle valves, filters, water hammer eliminators, etc. And the first valve 100 and the second valve 200 can be different types of valves respectively, or the same type of valves. The above all belong to the protection scope of the present utility model.

[0050] Figure 2 The case where the first valve 100 is a gate valve and the second valve 200 is a pressure reducing valve is exemplified in the figure, Figure 2 For example, one side of the first valve 100 has a first joint 1, and one side of the second valve 200 has a second joint 2. Among them, the first joint 1 and the second joint 2 are directly connected. It should be noted that the "direct connection" here means directly docking the first joint 1 of the first valve 100 and the second joint 2 of the second valve 200 in direct contact with each other, so that the internal medium can flow between the first valve 100 and the second valve 200 through the connection structure of the first joint 1 and the second joint 2.

[0051] Among them, in this embodiment, the connection structure of the first joint 1 and the second joint 2 is not limited. Those skilled in the art can directly dock the first joint 1 of the first valve 100 and the second joint 2 of the second valve 200 in any way according to actual needs. For example, in some embodiments, the end faces of the first joint 1 and the second joint 2 can be directly abutted, and then the first joint 1 and the second joint 2 can be connected and fixed by means of winding, bolts, etc., so as to realize the direct connection of the first valve 100 and the second valve 200; or, in some other embodiments, the second joint 2 can also be inserted into the first joint 1 to realize the direct connection of the first valve 100 and the second valve 200.

[0052] In this embodiment, by directly connecting the first joint 1 of the first valve 100 and the second joint 2 of the second valve 200, it is not necessary to use a coupling joint to connect between the first valve 100 and the second valve 200, which can greatly simplify the valve installation process, and reduce the leakage points in the valve connection structure, and the leakage risk is small.

[0053] Embodiment 2

[0054] In Embodiment 2 provided by the present utility model, a connection structure is provided that can directly connect the first joint 1 of the first valve 100 and the second joint 2 of the second valve 200. Specifically, Figure 3 shows a sectional view of the first joint and the second joint of the valve connection structure provided in Embodiment 2 of the present utility model at the connection position, as Figure 3 shown, the second joint 2 is inserted into the first joint 1, thereby realizing direct radial limitation of the first joint 1 and the second joint 2. After that, a limiting component 3 for axial limitation is added at the connection of the first joint 1 and the second joint 2.

[0055] It should be noted that the specific structure of the limiting component 3 for axial limitation in this embodiment is not limited here. Those skilled in the art can freely select the structure for axially limiting the first joint 1 and the second joint 2 according to actual needs. For example, in some embodiments, holes can be drilled in the inserted parts of the first joint 1 and the second joint 2 and pins ( Figure 3 not shown in the figure) can be inserted to realize axial limitation of the first joint 1 and the second joint 2; alternatively, a clamping structure corresponding to the first joint 1 can also be provided on the outer surface of the second joint 2. For example, a protrusion can be formed on the outer surface of the second joint 2, and a corresponding groove or through hole can be provided on the wall surface of the first joint 1. When the second joint 2 extends into the corresponding position in the first joint 1, clamping can be completed to realize axial limitation of the first joint 1 and the second joint 2.

[0056] In this embodiment, the inserted connection method is adopted to realize the direct connection of the first joint 1 and the second joint 2. On the one hand, it can increase the overlapping area of the second joint 2 and the first joint 1, reducing the leakage risk at the connection between the valves; on the other hand, it is also convenient to rotate and adjust the orientation of the valves during installation, so that the valves can be installed and fixed in the expected orientation. In addition, an axial limiting component 3 is further added on the basis of the inserted connection structure, so as to realize double limitation of the radial and axial directions of the valve connection structure, ensuring the installation stability between the two valves.

[0057] Embodiment 3

[0058] In Embodiment 2 provided by the present utility model, a more detailed and specific valve connection structure is provided. Figure 4 is a schematic structural diagram of the direct connection of the first joint and the second joint in Embodiment 3 of the present utility model. Figure 5 is Figure 4 a partial enlarged structural diagram of the A-A section in Figure 6 is Figure 4 a partial enlarged structural diagram of the B-B section in

[0059] Combined with Figures 4 - 6As shown, the limiting component 3 may include a plug pin 31, a jack 32, and a plugging groove 33. The plugging groove 33 is formed on the outer surface of the second joint 2 of the second connector 2. The first joint 1 is formed with a jack 32. The jack 32 is arranged corresponding to the plugging groove 33. The plug pin 31 passes through the jack 32 and is limited in the plugging groove 33. When installing the first valve 100 and the second valve 200, only need to insert the second joint 2 of the second valve 200 into the first joint 1 of the first valve 100, and then insert the plug pin 31 into the jack 32 to complete the fixed installation of the two valves. The installation process is more convenient.

[0060] It should be noted that in this embodiment, only one side of the first valve 100 is provided with the first joint 1, and one side of the second valve 200 is provided with the second joint 2, and it is not limited that all joints of the first valve 100 are the first joints 1, nor is it limited that all joints of the second valve 200 are the second joints 2. In some recommended embodiments, all joints of the first valve 100 can be set as the first joints 1. Correspondingly, all joints of the second valve 200 are set as the second joints 2; or, in some other recommended embodiments, one side joint of the first valve 100 can be set as the first joint 1, and the other side joint is set as the second joint 2. Correspondingly, one side joint of the second valve 200 is set as the second joint 2, and the other side joint is set as the first joint 1. The above embodiments can all realize the direct connection between the first joint 1 of the first valve 100 and the second joint 2 of the second valve 200, which belongs to the protection scope of the present invention.

[0061] Hereinafter, the structures of the plugging groove 33, the jack 32, and the plug pin 31 will be described in more detail with reference to the drawings.

[0062] [Plugging Groove]

[0063] The plugging groove 33 is arranged on the outer surface of the second joint 2. The plugging groove 33 can be arranged to completely surround the second joint 2 in a full circle, or it can also be arranged to partially surround the second joint 2. In a recommended embodiment, as Figure 7 shown, the plugging groove 33 is an annular groove that surrounds the second joint 2 in a full circle. During the process of the second joint 2 extending into the first joint 1, the second joint 2 can rotate 360° around the central axis at will, so that the orientations of the first valve 100 and the second valve 200 can be adjusted to the expected orientations, and when assembling, there is no need to align the jack 32 with the plugging groove 33. After the plug pin 31 extends in, it can be in limiting cooperation with the plugging groove 33, and the installation is more convenient.

[0064] In a further preferred embodiment, the plugging groove 33 is perpendicular to the central axis of the second joint 2. For the case where the second joint 2 is made of metal, the second joint 2 with the annular plugging groove 33 can be directly manufactured by turning, which is more convenient for processing.

[0065] [Jack]

[0066] The jack 32 is on the first joint 1. When the second joint 2 extends into the first joint 1 to the installation position, the jack 32 is just axially aligned with the insertion slot 33. Thus, after the pin 31 is inserted into the jack 32, it can extend into the insertion slot 33 to achieve axial limitation of the first joint 1 and the second joint 2. In a recommended embodiment, the jack 32 can be arranged tangentially along the second joint 2, which is more convenient for the processing of the first joint 1 and the second joint 2, and after the pin 31 is inserted by the jack 32, it can fall into the insertion slot 33.

[0067] Figures 8 - 10 Three formation methods of the jack 32 are exemplified. As Figure 8 shown, the jack 32 can be a through hole that penetrates the first joint 1 tangentially along the second joint 2, which is more convenient for processing, and the pin 31 can be inserted from any side to achieve axial limitation of the first joint 1 and the second joint 2, which can improve the reliability of the valve connection structure.

[0068] As Figure 9 and Figure 10 shown, the first joint 1 includes a main body portion 12 and a convex seat 11. The convex seat 11 protrudes from the main body portion 12, and the jack 32 is opened in the convex seat 11. In a recommended embodiment, the convex seat 11 can be formed by extending tangentially along the first joint 1, which is more convenient for turning processing. The opening of the convex seat 11 helps to ensure the insertion direction of the pin 31, especially can effectively limit the single pin 31. Among them, Figure 9 exemplifies the case where the convex seat 11 extends tangentially along the first joint 1 to one side. In this case, the jack 32 has only one end open and is formed as a blind hole, with better sealing performance. Figure 10 exemplifies the case where the convex seat 11 extends tangentially along the second joint 2 to both sides. By setting the convex seat 11, the length of the jack 32 can be increased, thereby improving the reliability of the insertion structure composed of the pin 31 and the jack 32.

[0069] Furthermore, as a preferred embodiment, the end face of the convex seat 11 is a plane, and the port of the jack 32 is opened on the end face of the convex seat 11. It is convenient for positioning and the processing of the jack 32.

[0070] [Pin]

[0071] During the installation process of the first joint 1 and the second joint 2, the pin 31 needs to extend into the socket 32 and cooperate with the socket groove 33 on the surface of the second joint 2 for limiting. The specific structure of the pin 31 is not limited here, as long as it can extend into the socket 32 and fall into the socket groove 33. According to different usage scenarios, the pin 31 can be a single pin, a U-shaped pin, etc. The above solutions of simply replacing the mating shape of the pin 31 and the socket 32 also fall within the protection scope of the present utility model.

[0072] Figure 11 It is a schematic cross-sectional structure diagram of the pin of the valve connection structure in Embodiment III of the present utility model inserted into the socket 32. Combining Figure 10 and Figure 11 it can be seen that the pin 31 is in contact with the bottom surface of the socket groove 33. Further, the pin 31 can be tangent to the inner circle of the socket groove 33. Thus, after the pin 31 is inserted, it can completely extend into the socket groove 33 and abut against the bottom surface of the socket groove 33, thereby further improving the reliability of the limiting structure of the pin 31 in the socket groove 33 and reducing the risk of the pin 31 coming out of the socket groove 33.

[0073] In addition, Figure 11 illustrates the case where the pin 31 is in the shape of a straight rod. For the straight rod-shaped single pin 31, the pin 31 can include an insertion portion 311 and an extension portion 312. The insertion portion 311 matches the shape of the socket 32 and extends into the socket 32, and the extension portion 312 is fixed at the end of the insertion portion 311 away from the socket 32. The extension portion 312 can be used as a hand-held portion during installation, so that during the disassembly and assembly process, the user can hold or operate the extension portion 312 with tools to extend or pull out the pin 31, making the disassembly and assembly more convenient.

[0074] Figure 12 illustrates the case where the pin is a U-shaped pin. For the U-shaped pin 31, there are two sockets 32 on the first joint 1. The extending directions of the two sockets 32 are the same and are mirror-symmetrical along the diameter of the first joint 1. Thus, the two ends of the U-shaped pin 31 can extend into the two sockets 32 at the same time, further improving the reliability of the plugging and fixing structure among the pin 31, the socket 32, and the socket groove 33, and at the same time balancing the limiting force at the connection and improving the stress concentration at a single socket 32. It should be noted that in this embodiment, the case of a U-shaped pin 31 paired with two sockets 32 is used as an example, but it does not limit that the two-socket 32 solution must be paired with a U-shaped pin 31. In some embodiments, the two single pins 31 can also be used to insert into the two sockets 32 respectively for limiting, which also falls within the protection scope of the present utility model.

[0075] Embodiment IV

[0076] In this embodiment, compared with the valve connection structure in the above embodiments, the valve connection structure in the fourth embodiment is provided with one or more sealing rings 4 sleeved on the outer surface of the second joint 2. The sealing ring 4 protrudes from the outer surface of the second joint 2, and the other structures are the same, so they will not be elaborated here.

[0077] Figures 13 - 15 It is a schematic connection structure diagram of the first joint and the second joint of the valve connection structure provided in the fourth embodiment of the present invention. As Figure 13 shown, the sealing ring 4 at least includes a first sealing ring 41 disposed between the external connection end of the second joint 2 and the insertion slot 33. Herein, the external connection end refers to the end of the first joint 1 facing the second joint 2 or the end of the second joint 2 facing the first joint 1 when the first joint 1 and the second joint 2 are assembled. When the second joint 2 extends into the first joint 1 for insertion, the sealing ring 4 sleeved on the outer surface of the second joint 2 is deformed by extrusion, so as to be pressed tightly between the inner surface of the first joint 1 and the outer surface of the second joint 2. Moreover, the first sealing ring 41 is closer to the external connection end of the second joint 2, so that the connection structure between the first joint 1 and the second joint 2 can be sealed, and the medium can be prevented from overflowing from the connection part of the first joint 1 and the second joint 2.

[0078] Further preferably, as Figure 14 shown, two or more (>2) first sealing rings 41 can also be provided, which can achieve a better sealing effect.

[0079] As Figure 15 shown, the sealing ring 4 may further include a second sealing ring 42, and the second sealing ring 42 and the first sealing ring 41 are respectively disposed on both sides of the insertion slot 33. The second sealing ring 42 provides a second layer of protection for the seal between the second joint 2 and the first joint 1, further enhancing the sealing effect. In addition, after the assembly is completed, the second sealing ring 42 is closer to the external connection end of the first joint 1. It can balance the extrusion force of the first sealing ring 41 on the inner surface of the first joint 1, thereby improving the bending resistance effect of the pipeline at the connection part and providing effective protection for the first sealing ring 41.

[0080] Embodiment Five

[0081] In this embodiment, compared with the valve connection structure in the above embodiments, the valve connection structure in the fifth embodiment is provided with a stepped surface 5, and the other structures are the same, so they will not be elaborated here.

[0082] Among them, the stepped surface 5 is provided at the junction of the first joint 1 and the second joint 2. When the external end of the first joint 1 or the second joint 2 abuts against the stepped surface 5, the jack 32 and the insertion slot 33 are axially aligned. When the first joint 1 and the second joint 2 are assembled, the stepped surface 5 is provided at the end of the first joint 1 far from the second valve 200. At the position where the first joint 1 and the second joint 2 are completely docked, the external end of the second joint 2 abuts against the stepped surface 5, and the jack 32 and the insertion slot 33 are axially aligned. Alternatively, the stepped surface 5 is provided at the end of the second joint 2 far from the first valve 100. At the position where the first joint 1 and the second joint 2 are completely docked, the external end of the first joint 1 abuts against the stepped surface 5, and the jack 32 and the insertion slot 33 are axially aligned. The above structure is convenient for installation. When the second joint 2 extends into the first joint 1 and abuts against the stepped surface 5, the axial alignment of the jack 32 and the limiting slot can be automatically achieved.

[0083] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A valve connection structure, comprising: A first valve (100), one side of the first valve (100) having a first joint (1); A second valve (200), one side of the second valve (200) having a second joint (2), characterized in that: the first joint (1) and the second joint (2) are directly communicated.

2. The valve connection structure according to claim 1, wherein: The second joint (2) is inserted into the first joint (1).

3. The valve connection structure according to claim 2, characterized in that: It further includes a limiting component (3) for axially limiting the first joint (1) and the second joint (2).

4. The valve connection structure according to claim 3, characterized in that: The limiting component (3) includes a plug pin (31), a jack (32) and a plugging groove (33). A plugging groove (33) is formed on the outer surface of the second joint (2), a jack (32) is formed on the first joint (1), the jack (32) is correspondingly arranged with the plugging groove (33), and the plug pin (31) passes through the jack (32) and is limited in the plugging groove (33).

5. The valve connection structure according to claim 4, characterized in that: The plugging groove (33) is an annular groove surrounding the second joint (2).

6. The valve connection structure according to claim 5, characterized in that: The plugging groove (33) is perpendicular to the central axis of the second joint (2).

7. The valve connection structure according to claim 4, wherein: The jack (32) is arranged tangentially along the outer surface of the second joint (2).

8. The valve connection structure according to claim 4, characterized in that: The jack (32) is a through hole or a blind hole.

9. The valve connection structure according to claim 4, characterized in that: The first joint (1) includes a main body portion (12) and a convex seat (11), and the jack (32) is opened in the convex seat (11).

10. The valve connection structure according to claim 9, characterized in that: The end face of the convex seat (11) is a plane, and the port of the jack (32) is opened on the end face of the convex seat (11).

11. The valve connection structure according to claim 4, characterized in that: The plug pin (31) is in contact with the bottom surface of the plugging groove (33).

12. The valve connection structure according to claim 4, wherein: One or more sealing rings (4) are sleeved on the outer surface of the second joint (2), the sealing rings (4) protrude from the outer surface of the second joint (2), and the sealing rings (4) at least include a first sealing ring (41) arranged between the external connection end of the second joint (2) and the plugging groove (33).

13. The valve connection structure according to claim 12, characterized in that: The sealing ring (4) further includes a second sealing ring (42), and the second sealing ring (42) and the first sealing ring (41) are respectively arranged on both sides of the plugging groove (33).

14. The valve connection structure according to claim 4, characterized in that: A step surface (5) is provided at the junction of the first joint (1) and the second joint (2). When the external connection end of the first joint (1) or the second joint (2) abuts against the step surface (5), the jack (32) and the plugging groove (33) are axially aligned.

15. The valve connection structure according to claim 4, characterized in that: The plug pin (31) is a single plug pin corresponding to the jack one by one.

16. The valve connection structure according to claim 15, wherein: The single plug pin (31) is in a straight rod shape.

17. The valve connection structure according to claim 4, wherein: The plug pin (31) is a U-shaped plug pin.

18. The valve connection structure according to claim 1, characterized in that: The first valve and / or the second valve is a water service valve.

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