A kind of live joint assembly and filter ball valve

Abstract

The utility model belongs to magnetic filtering technical field discloses a kind of live joint assembly and filter ball valve, including live joint, telescopic check ring and the live joint nut of sleeve joint in live joint, live joint has with the outer end of live joint nut cooperation, and the connecting end away from outer end, outer end includes joint body and the stop step of protruding in the lateral wall of joint body outside;Live joint inner wall is provided with assembly groove, assembly groove includes the limiting side close to connecting end and the assembly side away from connecting end, the bottom of limiting side protrudes from limiting step;During assembly, check ring can be set on stop step, and check ring set on stop step can be contained by assembly side;After assembly is completed, check ring is axially limited between stop step and the lateral wall of limiting side, and radially limited between limiting step and the lateral wall of joint body. Outer end does not need to pass through live joint nut, the installation of check ring can be completed, shortens the overall length of live joint assembly, reduces space occupancy.

Description

Technical Field

[0001] This utility model relates to the field of magnetic filtration technology, and in particular to a joint assembly and a filter ball valve. Background Technology

[0002] When using pipelines to transport liquids, a filter ball valve is needed to control the flow of liquid while simultaneously filtering it, thereby ensuring the quality of the liquid exiting the pipeline. Existing filter ball valves consist of a valve body and a filter assembly. The valve body has an axially oriented flow channel for liquid passage, and also includes a filter chamber connected to the flow channel. This filter chamber has an assembly port for assembling the filter assembly.

[0003] In practical applications, filter ball valves typically require a separate union assembly for connection to external pipelines. Currently used union assemblies include a union, a nut, and a retaining ring. The union's connecting end connects to the valve cover of the valve body, the nut is fitted onto the outer end of the union, and the retaining ring is sandwiched between the union and the nut to restrict axial movement. However, in existing union assemblies, the retaining ring must be installed from the outer end of the union during assembly. This requires the outer end of the union to be longer than the nut to ensure proper installation. This results in a longer overall length for the union assembly, occupying more installation space and limiting its application in space-constrained conditions. Furthermore, it increases the production cost of the filter ball valve, hindering its market competitiveness.

[0004] Therefore, there is an urgent need to propose a union assembly and a filter ball valve to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this invention is to provide a union assembly and a filter ball valve to shorten the overall length of the union assembly, reduce space occupancy, adapt to various installation conditions, and reduce production costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A union assembly includes a union connector, a retractable retaining ring, and a union nut fitted onto the union connector. The union connector has an outer end that mates with the union nut and a connecting end away from the outer end. The outer end includes a connector body and a stop step, the stop step protruding from the outer side wall of the connector body.

[0008] The inner wall of the swivel nut is provided with an assembly groove, which includes a limiting side near the connecting end and an assembly side away from the connecting end. The bottom of the limiting side is provided with a limiting step.

[0009] During assembly, the retaining ring can be fitted onto the stop step, and the retaining ring fitted onto the stop step can be accommodated by the assembly side.

[0010] After assembly, the retaining ring is located at its upper limit in the axial direction between the stop step and the side wall of the limiting side, and at its upper limit in the radial direction between the limiting step and the outer side wall of the connector body.

[0011] In some alternative embodiments, the front side of the stop step has a guide surface, and the retaining ring is guided by the guide surface to be sleeved onto the stop step.

[0012] In some alternative embodiments, the retaining ring has an opening.

[0013] In some alternative embodiments, the depth of the mounting groove on the mounting side is greater than the wire diameter D of the retaining ring.

[0014] In some alternative embodiments, the depth of the limiting side of the assembly groove is less than the wire diameter D of the retaining ring.

[0015] In some alternative embodiments, half the wire diameter D of the retaining ring is less than the height L of the stop step.

[0016] In some alternative embodiments, the union assembly further includes a seal for sealingly engaging with the part to be connected, the seal being sandwiched between the outer end of the union and the part to be connected.

[0017] A filter ball valve includes a valve body, a filter assembly, and a union assembly as described in any of the preceding claims. The valve body has a valve cavity, the filter assembly extends into the valve cavity, and the union assembly is connected to the valve body and forms an inlet or outlet channel for the valve cavity.

[0018] In some optional embodiments, the valve body further includes a valve core, a valve stem, and an operating part. The valve body is provided with a mounting hole communicating with the valve cavity. The valve stem passes through the mounting hole, with one end connected to the valve core and the other end connected to the operating part.

[0019] The inner wall of the mounting hole is provided with a positioning part. The operating part cooperates with the positioning part to enable the valve stem to switch between at least two rotation angle positions, which correspond to the flow-through position and the cut-off position of the valve core, respectively.

[0020] In some alternative embodiments, the filter assembly includes a sealing seat and a filter screen connected to the sealing seat, the valve body further includes an assembly port communicating with the valve cavity, the sealing seat is detachably and sealingly inserted into the assembly port, and the filter screen extends into the valve cavity.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a union assembly, including a union connector, a retractable retaining ring, and a union nut fitted onto the union connector. The union connector has an outer end that mates with the union nut and a connecting end away from the outer end. The outer end includes a connector body and a stop step, with the stop step protruding from the outer side wall of the connector body. An assembly groove is formed on the inner wall of the union nut, including a limiting side near the connecting end and an assembly side away from the connecting end. A limiting step protrudes from the bottom of the limiting side. During assembly, the retaining ring can be fitted onto the stop step, and the retaining ring fitted onto the stop step can be accommodated by the assembly side. After assembly, the upper limit of the retaining ring in the axial direction is located between the stop step and the side wall of the limiting side, and the upper limit of the retaining ring in the radial direction is located between the limiting step and the outer side wall of the connector body.

[0023] During assembly, the retaining ring is first compressed and inserted into the assembly side of the assembly slot. Then, the union nut is fitted onto the union joint. During this fitting process, the stop step pushes against the retaining ring, causing it to expand radially within the assembly side and settle onto the stop step. As the stop step extends further, the retaining ring eventually passes over it, with its axial upper limit located between the stop step and the side wall of the limiting side, and its radial upper limit located between the limiting step and the outer side wall of the joint body. The limiting step restricts the expansion of the retaining ring, preventing it from crossing the stop step in the opposite direction, thus ensuring that the retaining ring is axially limited between the stop step and the side wall of the limiting side. This achieves a limiting connection between the union joint and the union nut, preventing separation. This design allows the retaining ring to be installed without the external end of the union joint extending beyond the union nut, reducing the length requirement for the external end and shortening the overall length of the union assembly. This reduces the space occupancy of the union assembly, adapts to various installation conditions, and helps reduce production costs.

[0024] This utility model also provides a filter ball valve, including a valve body, a filter assembly, and the aforementioned union assembly. The valve body has a valve cavity, the filter assembly extends into the valve cavity, and the union assembly is connected to the valve body, forming an inlet or outlet channel for the valve cavity. The liquid to be filtered enters the valve cavity through the inlet channel, is filtered by the filter assembly within the valve cavity, and then flows out through the outlet channel. The filter assembly can filter particulate matter in the liquid to be filtered, thereby improving the purity of the liquid passing through this filter ball valve. By using the aforementioned union assembly, the overall length of the union assembly can be shortened, reducing space occupancy, adapting to various installation conditions, and reducing production costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the filter ball valve described in this embodiment of the utility model;

[0027] Figure 2 This is a cross-sectional view of the filter ball valve described in this embodiment of the utility model;

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a top view of the filter ball valve described in this embodiment of the utility model;

[0030] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0031] Figure 6 This is a schematic diagram of the structure of the filter assembly described in an embodiment of the present invention.

[0032] In the picture:

[0033] 100. Filter ball valve; 110. Valve body; 111. Valve cavity; 112. Inlet channel; 113. Outlet channel; 114. Mounting hole; 115. Positioning part; 1151. First positioning surface; 1152. Second positioning surface; 116. Assembly port; 120. Filter assembly; 121. Sealing seat; 122. Filter screen; 123. Magnetic component; 130. Valve core; 140. Valve stem; 150. Operating part;

[0034] 2. Union assembly; 21. Union connector; 211. External end; 2111. Connector body; 2112. Stop step; 2113. Guide surface; 212. Connecting end; 22. Union nut; 221. Assembly groove; 2211. Assembly side; 2212. Limiting side; 222. Limiting step; 23. Retaining ring; 24. Seal. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0036] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0037] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," "combined," "coupled," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can be 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. For example, a direct connection refers to two parts or components being connected together without an intermediate component, while an indirect connection refers to two parts or components each being connected to at least one intermediate component, with the connection achieved through the intermediate component. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0039] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0040] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0041] In this utility model, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely 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. Furthermore, in the context, it should be understood that when an element is mentioned as being "upper" or "lower" of another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as "upper side," "lower side," "left side," "right side," "front side," and "rear side" not only represent positive orientation but can also be understood as lateral orientation. For example, "above," "on top of," "upper side of," and "above" of the first feature and the second feature include the first feature being directly above, to the upper left, to the upper right, to the upper front, and to the upper rear of the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," "below," and "below" for "first feature" and "second feature" include situations where the first feature is directly below, to the lower left, to the lower right, in front of, or behind the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0042] like Figures 1-3As shown, this embodiment provides a union assembly 2, including a union connector 21, a retractable retaining ring 23, and a union nut 22 fitted onto the union connector 21. The union connector 21 has an outer end 211 that mates with the union nut 22, and a connecting end 212 away from the outer end 211. The outer end 211 includes a connector body 2111 and a stop step 2112, the stop step 2112 protruding from the outer side wall of the connector body 2111. The inner wall of the union nut 22 is provided with an assembly groove 221, the assembly groove 221 including a groove near the connecting end. The limiting side 2212 of 212 and the assembly side 2211 away from the connecting end 212 are provided with a limiting step 222 protruding from the bottom of the limiting side 2212. During the assembly process, the retaining ring 23 can be sleeved on the stopping step 2112, and the retaining ring 23 sleeved on the stopping step 2112 can be accommodated by the assembly side 2211. After the assembly is completed, the upper limit of the axial direction of the retaining ring 23 is located between the stopping step 2112 and the side wall of the limiting side 2212, and the upper limit of the radial direction of the retaining ring 23 is located between the limiting step 222 and the outer side wall of the connector body 2111.

[0043] During assembly, the retaining ring 23 is first compressed and inserted into the assembly side 2211 of the assembly groove 221. Then, the union nut 22 is fitted onto the union connector 21. During this fitting process, the stop step 2112 pushes against the retaining ring 23, causing the retaining ring 23 to expand radially within the assembly side 2211 and fit onto the stop step 2112. As the stop step 2112 extends further, the retaining ring 23 eventually crosses the stop step 2112, with its axial upper limit located between the stop step 2112 and the side wall of the limiting side 2212, and its radial upper limit located between the limiting step 222 and the outer side wall of the connector body 2111. The limiting step 222 restricts the expansion of the retaining ring 23, preventing it from crossing the stop step 2112 in the opposite direction. This ensures that the retaining ring 23 is axially limited between the stop step 2112 and the side wall of the limiting side 2212, thereby achieving a limiting connection between the union connector 21 and the union nut 22 and preventing separation. With the above settings, the outer end 211 of the union 21 does not need to go through the union nut 22 to complete the installation of the retaining ring 23, which reduces the length requirement of the outer end 211, thereby shortening the overall length of the union assembly 2, reducing the space occupation rate of the union assembly 2, adapting to various installation conditions, and helping to reduce production costs.

[0044] It is easy to understand that when the stop step 2112 enters the union nut 22, the front side of the stop step 2112 faces the retaining ring 23, as shown in the figure. The front side of the stop step 2112 has a guide surface 2113, and the retaining ring 23 is guided by the guide surface 2113 to be sleeved onto the stop step 2112. The guide surface 2113 provides a clear initial guide for the stop step 2112 to extend into the retaining ring 23, ensuring that the stop step 2112 can be aligned with the inner ring of the retaining ring 23 in the initial stage of docking, reducing offset and misalignment during docking, avoiding rigid impact between the stop step 2112 and the retaining ring 23, and extending the service life of the live joint assembly 2. As the stop step 2112 gradually extends in, the axial pushing force of the stop step 2112 is decomposed by the inclined guide surface 2113. Part of it maintains axial advancement, and the other part is converted into radial pushing force, so that the inner wall of the retaining ring 23 gradually fits with the outer circumference of the stop step 2112, realizing radial expansion, ensuring that the retaining ring 23 can accurately pass over the stop step 2112, which helps to reduce assembly difficulty and improve assembly stability.

[0045] In this embodiment, the guide surface 2113 is an inclined plane, which has a simple structure and is easy to manufacture. In other embodiments, the guide surface 211 can also be a convex arc surface, which can also play a guiding role.

[0046] In some alternative embodiments, the retaining ring 23 has an opening through which the retaining ring 23 can be elastically opened and closed to achieve radial expansion.

[0047] Specifically, retaining ring 23 is a retaining ring.

[0048] like Figure 3 As shown, in some optional embodiments, the cross-section of the retaining ring 23 along the axis is circular. When the stop step 2112 abuts against the retaining ring 23, the surface of the retaining ring 23 has no sharp edges, and the retaining ring 23 and the stop step 2112 have a continuous line contact, which can avoid jamming with the stop step 2112. Furthermore, during the process of the retaining ring 23 passing over the stop step 2112, the retaining ring 23 and the stop step 2112 are always in line contact. The small contact area between the two is beneficial to reduce frictional resistance, thereby making the assembly of the retaining ring 23 and the outer end 211 of the live joint 21 smoother and reducing the difficulty of operation.

[0049] In some alternative embodiments, the depth of the mounting side 2211 of the mounting groove 221 is greater than the wire diameter D of the retaining ring 23, so that the retaining ring 23 can be accommodated to expand radially under the push of the stop step 2112 and pass over the stop step 2112, so that the retaining ring 23 can be automatically assembled to the rear side of the stop step 2112 during the process of the stop step 2112 going deeper, without the need for the external end 211 to go through the live nut 22 for assembly, thus shortening the overall length of the live assembly 2.

[0050] In another optional embodiment, the depth of the limiting side 2212 of the assembly groove 221 is less than the wire diameter D of the retaining ring 23, that is, the distance between the top of the limiting step 222 and the inner wall of the union nut 22 is less than the wire diameter D of the retaining ring 23, so that the limiting step 222 can limit the radial expansion of the retaining ring 23 to prevent the retaining ring 23 from slipping out of the stop step 2112 in the opposite direction, thereby ensuring the reliability of the connection between the union joint 21 and the union nut 22.

[0051] Furthermore, half of the wire diameter D of the retaining ring 23 is less than the height L of the stop step 2112. This means that when the retaining ring 23 is axially engaged between the stop step 2112 and the side wall of the limiting side 2212, the distance between the midpoint of the cross-section of the retaining ring 23 and the outer side wall of the union 21 is less than the height L of the stop step 2112. This helps to ensure the limiting effect of the stop step 2112 on the retaining ring 23, further eliminating the risk of the retaining ring 23 slipping out of the stop step 2112 in the opposite direction, and ensuring the reliability of the union assembly 2.

[0052] In some optional embodiments, the union assembly 2 further includes a seal 24 for sealingly engaging with the component to be connected. The seal 24 is sandwiched between the outer end 211 of the union 21 and the component to be connected, thereby effectively preventing liquid leakage from the gap between the outer end 211 and the component to be connected, thus ensuring good sealing performance. It should be noted that the seal 24 is a rectangular sealing ring. The rectangular sealing ring makes surface contact with both the outer end 211 and the end face of the component to be connected, so that the contact area remains basically unchanged when the pressure increases, the sealing force is evenly distributed, and it is not easy to deform or fail due to excessive local pressure. It is suitable for high-pressure conditions and has excellent sealing performance.

[0053] This embodiment also provides a filter ball valve 100, which is applied in a piping system to filter solid particulate impurities. In this embodiment, the filter ball valve 100 is installed in the water system of a heat pump unit, serving to clean the water and protect the terminal unit. Of course, in other embodiments, the filter ball valve 100 can also be installed in a water supply and drainage system or other systems.

[0054] Specifically, such as Figure 1 and Figure 2As shown, this filter ball valve 100 includes a valve body 110, a filter assembly 120, and a union assembly 2 as described in any of the above embodiments. The valve body 110 has a valve cavity 111. The filter assembly 120 extends into the valve cavity 111. The connecting end 212 of the union assembly 21 is connected to the valve body 110 and forms the inlet channel 112 or outlet channel 113 of the valve cavity 111. The liquid to be filtered enters the valve cavity 111 through the inlet channel 112, is filtered by the filter assembly 120 in the valve cavity 111, and flows out through the outlet channel 113. The filter assembly 120 can filter particulate matter in the liquid to be filtered, thereby improving the purity of the liquid filtered through this filter ball valve 100. By using the above-mentioned union assembly 2, the overall length of the union assembly 2 can be shortened, the space occupancy rate can be reduced, it can be adapted to various installation conditions, and the production cost can be reduced.

[0055] Furthermore, the existing union assembly 2, as an independent external component, requires additional assembly operations with the filter ball valve 100. This not only increases the assembly steps of the overall device, leading to reduced assembly efficiency, but also increases the overall cost of the filter ball valve 100 because the component needs to be manufactured separately. In this embodiment, the union assembly 2 uses the union joint 21 as a valve cover, which together with the valve body 110 forms the body of the filter ball valve 100. This simplifies the assembly steps, thereby improving assembly efficiency and reducing the overall production cost of the filter ball valve 100, thus enhancing the market competitiveness of the filter ball valve 100.

[0056] Furthermore, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the filter ball valve 100 also includes a valve core 130, a valve stem 140, and an operating part 150. The valve body 110 is provided with a mounting hole 114 communicating with the valve cavity 111. The valve stem 140 passes through the mounting hole 114, with one end connected to the valve core 130 and the other end connected to the operating part 150. The inner wall of the mounting hole 114 is provided with a positioning part 115. The operating part 150 cooperates with the positioning part 115 to allow the valve stem 140 to switch between at least two rotation angle positions, corresponding to the flow-through position and the cut-off position of the valve core 130, respectively. The positioning part 115 provides a precise positioning reference for the rotation of the operating part 150, ensuring that the valve stem 140 can stably switch to the two preset rotation angle positions, thereby enabling the valve core 130 to accurately switch to the flow-through position and the cut-off position, avoiding the valve core 130 from not opening or closing properly due to operational deviations. Meanwhile, this design can reduce the positioning difficulty during manual or mechanical operation, improve the efficiency and consistency of the opening and closing operation of the filter ball valve 100, ensure the reliability of the flow channel opening and closing during long-term operation of the filter ball valve 100, and maintain the stable operating conditions of the filtration system.

[0057] Specifically, the positioning part 115 protrudes from the inner wall of the mounting hole 114 and has a first positioning surface 1151 and a second positioning surface 1152 arranged at an angle. The operating part 150 can abut against the first positioning surface 1151 and the second positioning surface 1152. When the operating part 150 abuts against the first positioning surface 1151, the valve core 130 is in the flow-through position. When the operating part 150 abuts against the second positioning surface 1152, the valve core 130 is in the cut-off position.

[0058] In this embodiment, two centrally symmetrical positioning parts 115 are provided in the mounting hole 114. The two positioning parts 115 simultaneously abut against and limit the operation part 150, which can disperse the force on the positioning parts 115, avoid stress concentration that could damage the positioning parts 115, and extend the service life of the filter ball valve 100.

[0059] Specifically, the operating part 150 is flat and rectangular, with its two end faces distributed in parallel, which facilitates the use of external tools for clamping and operation, eliminating the valve handle in the prior art, which helps to reduce the overall size of the filter ball valve 100, adapt to various installation conditions, and reduce the production cost of the filter ball valve 100.

[0060] like Figure 3 and Figure 6 As shown, the filter assembly 120 further includes a sealing seat 121 and a filter screen 122. The filter screen 122 is connected to the sealing seat 121. The valve body 110 also includes an assembly port 116 communicating with the valve cavity 111. The sealing seat 121 is detachably and sealedly inserted into the assembly port 116, and the filter screen 122 extends into the valve cavity 111. When liquid enters the valve cavity 111 of this filter ball valve 100 through the water inlet channel 112, the filter screen 122 can filter the solid particles in the liquid. The filtered liquid flows out through the water outlet channel, ensuring the quality of the liquid output when the pipeline transports liquid.

[0061] Furthermore, the filter assembly 120 also includes a magnetic element 123 connected to the sealing seat 121. The magnetic element 123 is located inside the filter screen 122 and extends into the valve chamber 111. It can adsorb iron filings in the liquid, further improving the filtration effect and increasing the quality of the output liquid.

[0062] 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 other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations 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 live joint assembly, characterized in that, Includes a union joint (21), a retractable retaining ring (23), and a union nut (22) fitted onto the union joint (21). The union joint (21) has an outer end (211) that mates with the union nut (22) and a connecting end (212) away from the outer end (211). The outer end (211) includes a joint body (2111) and a stop step (2112). The stop step (2112) protrudes from the outer side wall of the joint body (2111). The inner wall of the live nut (22) is provided with an assembly groove (221). The assembly groove (221) includes a limiting side (2212) near the connecting end (212) and an assembly side (2211) away from the connecting end (212). The bottom of the limiting side (2212) is provided with a limiting step (222). During assembly, the retaining ring (23) can be fitted onto the stop step (2112), and the retaining ring (23) fitted onto the stop step (2112) can be accommodated by the assembly side (2211). After assembly, the retaining ring (23) is located between the stop step (2112) and the side wall of the limiting side (2212) at the upper limit of the axial direction, and between the limiting step (222) and the outer side wall of the connector body (2111) at the upper limit of the radial direction.

2. The live joint assembly according to claim 1, characterized in that, The front side of the stop step (2112) has a guide surface (2113), and the retaining ring (23) is guided by the guide surface (2113) and sleeved onto the stop step (2112).

3. The live joint assembly according to claim 1, characterized in that, The retaining ring (23) has an opening.

4. The live joint assembly according to claim 1, characterized in that, The depth of the assembly side (2211) of the assembly groove (221) is greater than the wire diameter D of the retaining ring (23).

5. The live joint assembly according to claim 1, characterized in that, The depth of the limiting side (2212) of the assembly groove (221) is less than the wire diameter D of the retaining ring (23).

6. The live joint assembly according to claim 1, characterized in that, The diameter D of the retaining ring (23) is less than half the height L of the stop step (2112).

7. The live joint assembly according to any one of claims 1 to 6, characterized in that, The union assembly (2) further includes a seal (24) for sealing and engaging with the part to be connected, the seal (24) being sandwiched between the outer end (211) of the union joint (21) and the part to be connected.

8. A filter ball valve, characterized in that, The device includes a valve body (110), a filter assembly (120), and a union assembly (2) as described in any one of claims 1 to 7. The valve body (110) has a valve cavity (111), the filter assembly (120) extends into the valve cavity (111), and the union assembly (21) is connected to the valve body (110) and forms an inlet channel (112) or an outlet channel (113) of the valve cavity (111).

9. The filter ball valve according to claim 8, characterized in that, It also includes a valve core (130), a valve stem (140) and an operating part (150). The valve body (110) is provided with a mounting hole (114) communicating with the valve cavity (111). The valve stem (140) passes through the mounting hole (114), with one end connected to the valve core (130) and the other end connected to the operating part (150). The inner wall of the mounting hole (114) is provided with a positioning part (115). The operating part (150) cooperates with the positioning part (115) to enable the valve stem (140) to switch between at least two rotation angle positions, which correspond to the flow-through position and the cut-off position of the valve core (130) respectively.

10. The filter ball valve according to claim 9, characterized in that, The filter assembly (120) includes a sealing seat (121) and a filter screen (122), the filter screen (122) being connected to the sealing seat (121). The valve body (110) also includes an assembly port (116) communicating with the valve cavity (111). The sealing seat (121) is detachably and sealedly inserted into the assembly port (116), and the filter screen (122) extends into the valve cavity (111).

Images