Joint assembly, valve device, and method for assembling valve device

Abstract

A joint assembly (100), a valve device, and a method for assembling the valve device. The joint assembly (100) comprises a first connecting assembly (110) comprising a connecting nut (111) and a connecting cap (112). The connecting nut (111) is threadedly connected to a joint portion. The connecting cap (112) comprises a cover plate portion (1122). A valve seat (121), a clamping sleeve (122), an abutting member (124), and sealing members (123a, 123b) which are all annular are further comprised. At least part of the abutting member (124) and the clamping sleeve are located in the valve seat (121). The abutting member (124) and the clamping sleeve (122) are distributed in the axial direction. The sealing members (123a, 123b) are arranged between the abutting member (124) and the valve seat (121) and between the abutting member (124) and a connecting pipe (300). When the joint portion is threadedly screwed into a first hole section (1111), the cover plate portion abuts against the sealing members (123a, 123b) between the abutting member (124) and the connecting pipe in the axial direction, and the cover plate portion (1122) abuts against the abutting member (124). The abutting member (124) abuts against the clamping sleeve. A top pushing portion is further arranged on the inner wall of a second hole portion (121d). The top pushing portion abuts against the clamping sleeve to tightly clamp the connecting pipe (300). According to the joint assembly, the connecting pipe is convenient to insert, and sealing is reliable.

Description

Connector assembly, valve device, and valve device assembling method

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 31, 2023, with application number 202310948921.X and invention name “A connector assembly, valve device and assembly method of valve device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of sealed connections, and in particular to a joint assembly, a valve device and an assembling method of the valve device. Background Art

[0003] Valve components, such as stop valves, can be connected to pipes via a connector assembly. The connector assembly includes a seal to ensure a sealed fit between the pipe and the connector assembly. However, in related art, the compression of the seal is fixed, making pipe installation very difficult.

[0004] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects is still a technical problem that needs to be solved urgently by those skilled in the art.

[0005] Summary of the Invention

[0006] The purpose of the present application is to provide a joint assembly in which the connecting pipe can be conveniently inserted and the sealing is more reliable.

[0007] The present application provides a joint assembly for connecting a joint portion and a connecting pipe, the joint assembly comprising:

[0008] A first connecting assembly includes a connecting nut and a connecting cap connected to each other, wherein the connecting nut is provided with a first hole portion, the first hole portion includes a first hole segment, and the first hole segment is provided with an internal thread for threaded connection with the joint portion; the connecting cap includes a cover portion;

[0009] A second connecting assembly includes a valve seat, a ferrule, a push member, and a sealing member, all of which are annular; the valve seat is provided with a second hole portion, at least a portion of the push member and the ferrule are located in the second hole portion, and the push member and the ferrule are distributed along the axial direction; the sealing member is provided between the push member and the valve seat and between the push member and the connecting pipe;

[0010] When the joint portion and the first hole section are tightened, the cover plate portion axially abuts against the push member, and pushes against the sealing member between the push member and the connecting pipe, the valve seat is provided with a push portion, the ferrule includes a conical portion, the push portion abuts against the conical portion, the conical end of the conical portion can be deformed, the conical end is hard-sealed with the connecting pipe, and the conical end is hard-sealed with the push portion.

[0011] The present application also provides a valve device, including a valve component, the valve component including a joint part, a connecting pipe and a joint assembly, the joint assembly is any of the joint assemblies described above, the connecting nut and the joint part are threadedly connected, and the connecting pipe is inserted into the second connecting assembly.

[0012] The present application also provides a method for assembling a valve device, which is applicable to the above-mentioned valve device. The assembly method comprises the following steps:

[0013] Configuring the valve components, connector assembly and connecting pipes;

[0014] inserting the connecting pipe into the joint assembly;

[0015] The connecting nut is screwed onto the joint portion so that the joint portion and the valve seat of the second connecting assembly are hard-sealed, and the threaded fitting size of the joint portion and the connecting nut is continuously increased so that the cover portion is displaced toward the second connecting assembly, and the cover portion pushes against the sealing member between the pushing member and the connecting pipe;

[0016] The thread matching size of the joint part and the connecting nut is continuously increased, the cover part pushes the pushing part, the pushing part pushes the ferrule and the pushing part tightly, and the ferrule deforms and clamps the connecting pipe.

[0017] In this application, when the threads are tightened, the cover plate is pressed against the seal between the connecting pipe and the push piece. Then, after the connecting pipe is inserted into the second connecting assembly and before the threads are tightened, the compression of the seal between the connecting pipe and the push piece is small, which can facilitate the installation of the connecting pipe. After the connecting pipe is installed, by adjusting the thread matching size of the connecting pipe and the connecting nut, the valve seat and the connecting cap can be driven to produce relative displacement. The cover plate can push against the seal between the push piece and the connecting pipe to increase the compression, thereby improving the sealing performance between the connecting pipe and the valve seat, so as to ensure the connection reliability between the joint assembly and the connecting pipe. In other words, the joint assembly can take into account both the convenience of installation and the reliability of connection. In addition, the setting of the ferrule can add a hard seal, which is combined with the soft seal of the seal to improve the sealing performance with the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of the valve device provided by an embodiment of the present invention during initial assembly.

[0019] Figure 2 is an enlarged view of portion A in Figure 1;

[0020] FIG3 is a schematic structural diagram of the connecting nut in FIG2 ;

[0021] FIG4 is a half-sectional view of the connecting nut in FIG3 along the axial direction;

[0022] FIG5 is a schematic structural diagram of the valve seat of the second connecting assembly in FIG2 ;

[0023] FIG6 is an axial cross-sectional view of the valve seat in FIG5 ;

[0024] FIG7 is a schematic structural diagram of a ferrule of the second connecting assembly in FIG2 ;

[0025] FIG8 is an axial cross-sectional view of the ferrule in FIG7 ;

[0026] FIG9 is a schematic structural diagram of the push member of the second connecting assembly in FIG2 ;

[0027] FIG10 is an axial cross-sectional view of the push member in FIG9 ;

[0028] FIG11 is a schematic structural diagram of the connecting cap in FIG2 ;

[0029] FIG12 is an axial cross-sectional view of the connecting cap in FIG11 ;

[0030] FIG13 is a schematic structural diagram of the valve device in FIG2 after being assembled;

[0031] FIG14 is a flow chart of an assembly method of a valve device according to an embodiment of the present application.

[0032] The reference numerals in Figures 1-14 are described as follows: 100 - connector assembly; 110 - first connecting assembly, 111 - connecting nut; 1111 - first hole portion, 1111a - first hole section, 1111b - second hole section, 1112 - third axial end surface, 1113 - fourth axial end surface; 112 - connecting cap, 1121 - cylindrical portion, 1122 - cover portion; 120-second connecting assembly, 121-valve seat, 121a-thin neck, 121b-thick neck, 121c-first step surface, 121d-second hole portion, 121d-1-limiting portion, 121d-2-second step surface, 121d-3-conical surface, 121e-first axial end face, 121f-first edge, 121g-second edge, 122-ferrule, 122a-rest portion, 122b-conical portion, 123a-first sealing member, 123b-second sealing member, 124-thrust member, 124a-third hole portion, 124a-1-second annular groove, 124b-first annular groove, 125-gasket 200-valve component, 210-connector portion; 300-connecting pipe. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] Please refer to FIG1 , which is a schematic structural diagram of the valve device provided by an embodiment of the present invention during initial assembly.

[0035] This embodiment provides a connector assembly 100 for realizing the connection between the connector portion 210 and the connecting pipe 300. This application does not limit the specific application scenario of the connector assembly 100, and those skilled in the art can determine it according to the specific situation. For example, in Figure 1, the connector assembly 100 in this embodiment can be applied to the connection between the connecting pipe 300 and the valve component 200. In this application scenario, the connector portion 210 can be a connector of the valve component 200, more specifically, it can be a connector of the stop valve, and the connecting pipe 300 can connect the stop valve and equipment such as the outdoor unit or indoor unit of the air conditioner; for another example, the connector portion 210 can also be a connector of other structures, such as a connector of another connecting pipe, and the above-mentioned connector assembly 100 can also be applied to the connection of two connecting pipes, etc.

[0036] Please continue to refer to FIG2 , which is an enlarged view of portion A in FIG1 .

[0037] The connector assembly 100 includes a first connector assembly 110 and a second connector assembly 120. The first connector assembly 110 includes a connecting nut 111 and a connecting cap 112. As shown in Figure 2, the connecting nut 111 and the connecting cap 112 in the first connector assembly 110 are assembled together to form a cylindrical structure with a bottom. The connecting nut 111 is used to connect to the connector portion 210, and the second connector assembly 120 is used to connect to the connecting pipe 300. The connecting cap 112 is connected to the connecting nut 111 and can act on the second connector assembly 120. Each component is described in detail below.

[0038] As shown in Figures 3 and 4, Figure 3 is a structural schematic diagram of the connecting nut 111 in Figure 2; Figure 4 is a half-sectional view of the connecting nut 111 in Figure 3 along the axial direction.

[0039] The connecting nut 111 in this embodiment is provided with a first hole portion 1111. The first hole portion 1111 passes through the connecting nut 111 in the axial direction. The first hole portion 1111 includes a first hole segment 1111a and a second hole segment 1111b. The first hole segment 1111a and the second hole segment 1111b are distributed in the axial direction of the first hole portion 1111, wherein the first hole segment 1111a is a threaded hole provided with an internal thread. The first hole segment 1111a and the second hole segment 1111b can be arranged adjacent to each other in the axial direction, or a separation structure in the form of an annular protrusion, a step surface, etc. can be provided on the inner wall surface of the first hole portion 1111 to separate the first hole segment 1111a and the second hole segment 1111b. In this way, the axial dimensions of the first hole segment 1111a and the second hole segment 1111b can be conveniently controlled. The first hole section 1111a is used to connect with the joint portion 210. Specifically, as shown in Figures 1 and 2, the valve component 200 can be provided with a joint portion 210, and the joint portion 210 is provided with an external thread for threaded connection with the internal thread of the first hole section 1111a.

[0040] The second connecting assembly 120 in this embodiment includes multiple parts, specifically a valve seat 121, a ferrule 122, a sealing member 123 and a thrust member 124, all of which are annular structures.

[0041] Please refer to Figures 5 and 6. Figure 5 is a structural schematic diagram of the valve seat 121 of the second connecting assembly 120 in Figure 2; Figure 6 is an axial cross-sectional view of the valve seat 121 in Figure 5.

[0042] As can be understood in conjunction with FIG2 , the valve seat 121 in the second connecting assembly 120 and the second hole section 1111b of the connecting nut 111 are slidably engaged. The second hole section 1111b can be, for example, a smooth hole section, but is not limited to being a smooth hole section, as long as it does not affect the relative axial sliding of the valve seat 121 and the connecting nut 111. The valve seat 121 can axially abut and seal against the connector portion 210 to achieve a seal between the connector assembly 100 and the connector portion 210. The specific form of the abutment seal is not limited herein, and those skilled in the art can configure it according to actual needs, as long as it can meet the requirements of use.

[0043] For example, as shown in Figures 2 and 6, the valve seat 121 has a first axial end face 121e facing the joint portion 210. The axial end face is the end face of the axial end portion. The first axial end face 121e is provided with a step portion. The step portion is located on the inner side of the first axial end face 121e. The edge of the step portion forms an annular first edge 121f, and the edge of the step sidewall of the step portion forms an annular second edge 121g. As shown in Figure 2, the joint portion 210 has a second axial end face 210a facing the valve seat 121. The second axial end face 210a is an annular conical surface. The first edge 121f and the second edge 121g of the valve seat 121 can abut against the second axial end face 210a. In this way, the valve seat 121 and the joint portion 210 can achieve an axial abutment seal. This sealing method is a line seal, and is a two-line seal. The seal is relatively reliable, simple to process, highly reliable, and has a relatively low risk of leakage. The first edge 121f and the second edge 121g herein may be linear edges or arcuate edges formed by chamfering.

[0044] It can be seen that the first axial end surface 121e of the valve seat 121 does not need to be provided with a step portion. In this embodiment, the valve seat 121 is provided with a second hole portion 121d extending axially therethrough. The inner edge of the first axial end surface 121e itself can form an edge, which can abut and seal with the second axial end surface 210a, that is, form a line seal. It is understood that when the joint portion 210 has an edge, the first axial end surface 121e of the valve seat 121 including a tapered surface can also achieve an abutment line seal. Of course, the valve seat 121 and the joint portion 210 can also be sealed using a surface seal.

[0045] 6 , the valve seat 121 in this embodiment is provided with a second hole portion 121d, and the second hole portion 121d passes through the valve seat 121 axially. The inner wall surface of the second hole portion 121d is provided with a limiting portion 121d-1, which is used to limit the installation depth of the connecting pipe 300 in the second hole portion 121d, that is, after the connecting pipe 300 is inserted into the valve seat 121, it can abut against the limiting portion 121d-1. In this way, the limiting portion 121d-1 can limit the installation position of the connecting pipe 300 in the joint assembly 100, which is convenient for the operator to determine that the connecting pipe 300 is installed in place.

[0046] The structural form of the limiting portion 121d-1 is not limited herein, as long as it can meet the requirements of use. For example, as shown in Figure 6, the limiting portion 121d-1 can be an annular boss provided on the inner wall of the second hole portion 121d. For example, the second hole portion 121d can also be configured with a variable diameter to form a limiting step surface on the inner wall of the second hole portion 121d, and then axially limit the position of the connecting pipe 300 through this limiting step surface. It should be understood that the second hole portion 121d can also be a non-through hole, for example, the limiting portion 121d-1 can be a partition plate.

[0047] Please continue to refer to Figures 7 and 8. Figure 7 is a structural schematic diagram of the ferrule 122 of the second connecting component 120 in Figure 2; Figure 8 is an axial cross-sectional view of the ferrule 122 in Figure 7.

[0048] The ferrule 122 is located in the second hole portion 121d of the valve seat 121. The ferrule 122 is used to clamp the connecting pipe 300 to achieve the connection between the joint assembly 100 and the connecting pipe 300. In this embodiment, the ferrule 122 includes a tapered tapered portion 122b.

[0049] 9 and 10 , FIG. 9 is a schematic structural diagram of the push member 124 of the second connecting assembly 120 in FIG. 2 ; FIG. 10 is an axial cross-sectional view of the push member 124 in FIG. 9 .

[0050] The push member 124 is a sleeve-like structure having a third hole portion 124a extending therethrough in the axial direction. The connecting pipe 300 can pass through the third hole portion 124a. As shown in FIG2 , the ferrule 122 and the push member 124 are axially distributed within the valve seat 121 and slideably engage with the valve seat 121, with the ferrule 122 being closer to the connector portion 210. The connecting pipe 300 passes through the push member 124 and the ferrule 122 in sequence in the axial direction. The push piece 124 has an inner side and an outer side distributed along the radial direction, the inner side is the side close to the axial center line of the push piece 124, and the outer side is the side away from the axial center line. The outer side of the push piece 124 is provided with a first annular groove 124b, and the inner side of the push piece 124 is provided with a second annular groove 124a-1. The first annular groove 124b and the second annular groove 124a-1 are both used to accommodate the seal 123. A part of the seal 123 is located in the corresponding annular groove. The seal is, for example, a sealing ring structure. As shown in Figure 2, the seal 123 located in the first annular groove 124b is a first seal 123a. The first seal 123a is used to seal the valve seat 121 and the push piece 124. The seal 123 located in the second annular groove 124a-1 is a second seal 123b. The second seal 123b is used to seal the connecting pipe 300 and the push piece 124.

[0051] Specifically, the first annular groove 124b is a groove, and the second annular groove 124a-1 is shown in Figure 10. The third hole portion 124a of the push member 124 is a stepped hole, including large holes and small holes distributed along the axial direction, wherein the large hole forms the second annular groove 124a-1. In this way, the side of the second annular groove 124a-1 away from the ferrule 122 is open, and a gasket 125 can be set at the open position.

[0052] Please continue to refer to Figures 11 and 12. Figure 11 is a structural schematic diagram of the connecting cap 112 in Figure 2; Figure 12 is an axial cross-sectional view of the connecting cap 112 in Figure 11.

[0053] The connecting cap 112 includes a cylindrical portion 1121 and a cover portion 1122. The cylindrical portion 1121 is externally mounted on the valve seat 121 and is connected to the connecting nut 111. The cover portion 1122 is disposed on one axial end of the cylindrical portion 1121, specifically on the end of the cylindrical portion 1121 away from the joint portion 210. The cover portion 1122 serves as the bottom of the cylindrical portion 1121. The cover portion 1122 and the cylindrical portion 1121 can be an integral structure or fixed separately. The cover portion 1122 is an annular plate structure with a through hole. The connecting pipe 300 can pass through the through hole of the cover portion 1122, and then pass through the push member 124 and the ferrule 122, and abut against the limit portion 121d-1.

[0054] As shown in Figure 2, the cover portion 1122 of the connecting cap 112 and the seal 123 located in the second annular groove 124a-1 are in axial contact. Since the second annular groove 124a-1 is open toward the side of the cover portion 1122, a gasket 125 can be set on the side of the second seal 123b toward the cover portion 1122, which is conducive to transmitting a thrust force to the second seal 123b. The cover portion 1122 directly contacts the gasket 125 to axially limit the second connecting component 120, so that the second connecting component 120 can be encapsulated between the connecting nut 111 and the connecting cap 112, that is, the cover portion 1122 indirectly pushes the second seal 123b. Of course, the cover portion 1122 can also directly push the second seal 123b.

[0055] 1 and 2 , when the valve seat 121 and the connecting nut 111 abut against each other axially, there is a first sliding gap between the push member 124 and the cover plate portion 1122 , and the first sliding gap at this time is X1. There is a second sliding gap between the valve seat 121 and the cover plate portion 1122 , and the second sliding gap at this time is X2, and X2 is greater than X1.

[0056] At the beginning of assembly, the connecting tube 300 can be inserted into the second connecting assembly 120. Due to the presence of the aforementioned first sliding gap X1, the second sealing member 123b can be free of axial compression force, resulting in relatively small compression of the second sealing member 123b, making insertion and assembly of the connecting tube 300 relatively easy. After the connecting tube 300 is abutted against the stopper 121d-1 and installed, the joint portion 210 can be installed and the joint portion 210 of the valve component 200 and the connecting nut 111 can be threadedly connected. By adjusting the threaded fit between the joint portion 210 and the connecting nut 111, the joint portion 210 and the valve seat 121 can be brought into axial contact, thereby achieving a contact seal between the joint portion 210 and the valve seat 121. Then, the thread matching size between the joint part 210 and the connecting nut 111 is continuously increased. Since the joint part 210 and the valve seat 121 are already in contact, the axial position of the valve seat 121 no longer changes. In this way, rotating the connecting nut 111 can drive the connecting cap 112 to move axially, and then generate axial displacement relative to the valve seat 121, that is, it can drive the cover plate part 1122 of the connecting cap 112 to move close to the valve seat 121 and the push member 124 to reduce the first sliding gap. When the displacement amount is X1, the first sliding gap is eliminated, and the compression amount of the second sealing member 123b reaches the maximum, thereby improving the sealing performance between the second connecting component 120 and the connecting pipe 300.

[0057] Please understand this in conjunction with FIG13 , which is a schematic structural diagram of the valve device in FIG2 after being assembled.

[0058] As shown in FIG13 , when the connecting nut 111 and the joint portion 210 are continuously tightened, the cover portion 1122 of the connecting cap 112 continuously approaches the valve seat 121, pushing the gasket 125 to compress the second sealing member 123 b. After moving a distance X1, the cover portion 1122 will contact the push member 124 and begin to push the push member 124 axially. It can be seen that the cover portion 1122 can push the push member 124 directly or indirectly, and the push of the cover portion 1122 against the push member 124 can further reduce the second sliding gap. When the cover portion 1122 begins to push the push member 124 When the push piece 124 is pushed, the second sliding gap has been reduced from X2 to X2-X1. The push piece 124 will push the sleeve 122 axially while moving axially. The inner wall of the second hole portion 121d of the valve seat 121 is formed with a pushing portion, which is specifically an annular conical surface 121d-3. During the axial movement of the conical portion 122b of the sleeve 122, the conical end of the conical portion 122b will be compressed by the conical surface 121d-3 and deformed to clamp the connecting pipe 300, that is, the conical end is hard-sealed with the connecting pipe 300 and is also hard-sealed with the pushing portion.

[0059] Here, when the ferrule 122 clamps the connecting pipe 300, a hard seal is formed, that is, the ferrule 122 can form a hard seal, which is combined with the soft seal of the first seal 123a and the second seal 123b to improve the sealing performance of the second connecting component 120 and the connecting pipe 300.

[0060] As shown in Figures 2 and 8, the sleeve 122 includes a sleeve-shaped conical portion 122b and an annular abutment portion 122a surrounding one axial end of the conical portion 122b. The inner wall of the second hole portion 121d of the valve seat 121 also includes a second step surface 121d-2. The second step surface 121d-2 is connected to the conical surface 121d-3. The abutment portion 122a and the second step surface 121d-2 are arranged opposite to each other, and the two have a third sliding gap. The third sliding gap is X3 in the initial assembly position, and X3 can be equal to X2-X1, that is, when the cover plate portion 1122 moves to abut against the axial end face of the valve seat 121, X2 is eliminated, as shown in Figure 13. At this time, X3 can also be eliminated synchronously, that is, when the sleeve 122 is at its maximum deformation, the abutment portion 122a also abuts against the second step surface 121d-2. Of course, X3 can also be less than X2-X1, that is, when the abutting portion 122a and the second stepped surface 121d-2 abut against each other, the cover plate portion 1122 does not need to abut the valve seat 121. As long as the deformation of the ferrule 122 is sufficient to clamp the connecting pipe 300 when the abutting portion 122a and the second stepped surface 121d-2 abut against each other, the structural stability is more reliable. It should be understood that the ferrule 122 can also be provided without the abutting portion 122a. The provision of the abutting portion 122a not only facilitates the pushing of the pushing member 124, but also provides a more stable structure when abutting against the second stepped surface 121d-2.

[0061] Here, the deformation of the ferrule 122 to clamp the connecting tube 300 primarily relies on the radial clamping force generated by the tapered surface 121d-3. The sealing of the ferrule 122 is a hard seal. The ferrule 122 is made of a hard material, such as stainless steel. In this case, the tapered shape facilitates deformation of its tapered end, thereby achieving a hard seal. It is understood that the inner wall of the valve seat 121 may also be provided with a thrust portion other than the tapered surface 121d-3. For example, the thrust portion may be an annular boss. If the tapered portion 122b is tapered, the tapered portion 122b may be gradually compressed by the annular boss as it passes through the annular boss, thereby clamping the connecting tube 300. That is, during the axial movement of the ferrule 122, the thrust portion generates a radial force on the ferrule 122, forcing the tapered end of the ferrule 122 to deform and clamp the connecting tube 300. At the same time, a hard seal is formed between the ferrule 122, the valve seat 121, and the connecting tube 300.

[0062] Based on the above analysis, it can be seen that the embodiments of the present application have the following technical effects:

[0063] The sliding arrangement between the valve seat 121 and the connecting nut 111 allows for adjustment of the compression of the second sealing member 123b used to contact and seal the connecting pipe 300. When the connecting pipe 300 is first installed, the valve seat 121 and the connecting nut 111 can be axially opposed, and the compression of the second sealing member 123b can be relatively small, facilitating the installation of the connecting pipe 300. After the connecting pipe 300 is installed, by adjusting the threaded fit between the connecting pipe 300 and the connecting nut 111, the valve seat 121 and the connecting cap 112 can be driven to produce relative displacement, which can push against the second sealing member 123b to increase the compression of the second sealing member 123b, thereby improving the sealing performance between the connecting pipe 300 and the valve seat 121, thereby ensuring the connection reliability of the joint assembly 100 and the connecting pipe 300.

[0064] In other words, the connector assembly 100 provided in the embodiment of the present application can take into account both the convenience of installation and the reliability of connection. In addition, the provision of the ferrule 122 can add a hard seal, which, combined with the soft seal of the seal, improves the sealing performance with the connecting pipe 300.

[0065] In addition, the valve seat 121 and the joint portion 210 are directly abutted and sealed, with fewer sealing points and better sealing, which can reduce the risk of leakage. Furthermore, it can be abutted line sealing as described above, which is more reliable.

[0066] In this embodiment, the cover plate portion 1122 can theoretically push the ferrule 122 by pushing the seal. However, the ferrule 122 is a hard seal, which requires a large thrust. In practice, the seal cannot withstand this thrust. Therefore, a thrust member 124 is provided to transmit the thrust. After the second seal 123b is compressed into place, the thrust member 124 transmits the thrust to the ferrule 122. In this case, due to the presence of the thrust member 124, it is necessary to provide seals on both sides to achieve a seal between the valve seat 121 and the connecting pipe 300. In this embodiment, the first annular groove 124b and the second annular groove 124a-1 are staggered in the axial direction. It is understandable that they can also be staggered. However, in this case, the thrust member 124 needs to be grooved on both the inner and outer sides of the same axial position. In comparison, the staggered arrangement is more likely to ensure the strength of the thrust member 124.

[0067] 6 , the valve seat 121 is provided with a first abutting portion, and the connecting nut 111 is provided with a second abutting portion, and the first abutting portion and the second abutting portion can abut against each other in the axial direction. Specifically, the valve seat 121 can include a thin neck portion 121a and a thick neck portion 121b, and the axial projection area of ​​the thin neck portion 121a can be smaller than that of the thick neck portion 121b. In this way, a first step surface 121c can be formed between the thin neck portion 121a and the thick neck portion 121b, and the first step surface 121c serves as the first abutting portion; the connecting nut 111 can have a third axial end surface 1112 (the right end surface in FIG. 2 ), and the third axial end surface 1112 serves as the second abutting portion. During specific assembly, the thin neck portion 121a can be slidably assembled in the second hole section 1111b, and the first step surface 121c can abut against the third axial end surface 1112 in the axial direction to achieve axial abutment between the valve seat 121 and the connecting nut 111.

[0068] It should be understood that the abutment and limiting structure between the valve seat 121 and the connecting nut 111 is not limited to the above description, and other structural forms can also be adopted as long as they can meet the requirements of use. Exemplarily, the second abutment portion can be a limiting structure in the form of a limiting surface or a limiting boss provided on the inner wall surface of the first hole portion 1111. The valve seat 121 has a first axial end surface 121e (the left end surface in Figure 6), and the first axial end surface 121e can be the first abutment portion. The valve seat 121 can then be axially abutted against the limiting structure in the first hole portion 1111 through the first axial end surface 121e, which is also feasible.

[0069] Here, the valve seat 121 and the connecting nut 111 are configured to abut axially, so that when the connecting pipe 300 is inserted, the valve seat 121 will not slide out along the connecting nut 111, making it easier for the connecting pipe 300 to be inserted into place. As will be seen in the subsequent description of the assembly process, when the joint portion 210 and the first hole section 1111a are threaded and tightened, there will be a gap between the first abutting portion and the second abutting portion in the axial direction, that is, they no longer abut. Therefore, in practice, if the valve seat 121 and the connecting nut 111 do not abut axially, the connecting pipe 300 can also be inserted. At this point, it can be understood that because the connecting nut 111 and the valve seat 121 abut axially, the connecting nut 111 and the connecting cap 112 are separately configured to facilitate the installation of the valve seat 121. If it is not limited to abutting axially, the connecting nut 111 and the connecting cap 112 can also be configured as a single body, for example, the cylindrical portions 1121 of the connecting nut 111 and the connecting cap 112 are configured to be approximately equal in diameter. Similarly, the above embodiment mentions providing a stopper 121d-1 to limit the connection tube 300 so as to ensure that the connection tube 300 is properly inserted. However, such a stopper is not actually required. As long as the connection tube 300 can pass through the ferrule 122, it can be clamped by the ferrule 122 during the subsequent assembly process. However, as mentioned above, providing the stopper 121d-1 and axially abutting the connection nut 111 and the valve seat 121 both facilitate assembly.

[0070] As shown in Figure 1 , the cylindrical portion 1121 and the connecting nut 111 can be welded together. This ensures a relatively high connection reliability and a high sealing performance between the connecting cap 112 and the connecting nut 111. Furthermore, since no threads are required on the cylindrical portion 1121, the thickness of the cylindrical portion 1121 can be relatively small, which also helps reduce the weight, structural dimensions, and cost of the connector assembly 100 provided by the present invention.

[0071] Specifically, as still shown in Figure 4, the outer wall surface of the connecting nut 111 can have a fourth axial end face 1113, the fourth axial end face 1113 and the third axial end face 1112 can be staggered in the axial direction, and the cylindrical portion 1121 can abut against the fourth axial end face 1113, and then can be welded to the fourth axial end face 1113.

[0072] It should be understood that in addition to the welding solution, other connection methods can also be used between the cylindrical portion 1121 and the connecting nut 111, such as threaded connection, clamping, screw connection, riveting, etc., as long as the connection is axial, it can drive the lower part of the connecting cap 112 to move synchronously axially relative to the valve seat 121.

[0073] The present application also provides a valve device comprising a valve component, a connecting pipe, and the aforementioned connector assembly 100. The valve component has a connector portion 210. The connecting nut 111 of the connector assembly 100 is threadedly connected to the connector portion 210. The connecting pipe is inserted into the second connecting assembly 120 and abuts against the stop portion 121d-1 to achieve connection between the connecting pipe and the valve component.

[0074] Please refer to FIG. 14 , which is a flow chart of an assembly method of a valve device according to an embodiment of the present application.

[0075] The present application also provides a valve assembly method applicable to the above-mentioned valve device. As shown in FIG14 , the assembly method includes the following steps S1 to S3.

[0076] Step S1 , arranging the valve component, the joint assembly 100 and the connecting pipe 300 .

[0077] Step S2, inserting the connecting pipe 300 into the second connecting assembly 120 in the joint assembly 100, specifically, making the connecting pipe 300 and the limiting portion 121d-1 abut against each other along the axial direction, indicating that the connecting pipe is plugged into place.

[0078] Step S3, screw the connecting nut 111 onto the joint part 210, so that the joint part 210 and the valve seat 121 of the second connecting component 120 directly abut to achieve a hard seal fit, and continue to increase the thread fit size of the joint part 210 and the connecting nut 111, so that the cover part 1122 moves toward the second connecting component 120, and the cover part 1122 pushes the sealing member, specifically abuts the second sealing member 123b. After the cover part 1122 moves a certain distance, continue to tighten the joint part 210, and the cover part 1122 continues to push the pushing member 124, and the pushing member 124 pushes the ferrule 122. The ferrule 122 contacts the conical surface 121d-3 of the pushing portion of the valve seat 121 and then tightens. The ferrule 122 deforms and clamps the connecting pipe 300. At this time, the joint part 210 and the first hole section 1111a are in a state where the threads are tightened.

[0079] That is, step S3 is to tighten the joint part 210 and the connecting nut 111. During this process, there will be three nodes. The first node is that the joint part 210 and the valve seat 121 of the second connecting component 120 directly abut. The second node is that the cover part 1122 pushes the second sealing part 123b into place and contacts the push part 124. The third node is that the cover part 1122 pushes the push part 124, indirectly pushing the ferrule 122, and causing the ferrule 122 to abut and deform with the pushing part (specifically the conical surface 121d-3) to clamp the connecting pipe 300.

[0080] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A joint assembly, used to achieve the connection between a joint part (210) and a connecting pipe (300), characterized in that: The joint assembly comprises: A first connection assembly (110), comprising a connecting nut (111) and a connecting cap (112) connected to each other, wherein the connecting nut (111) is provided with a first hole portion (1111), the first hole portion (1111) comprises a first hole section (1111a), the first hole section (1111a) is provided with an internal thread for threaded connection with the joint portion (210); the connecting cap (112) comprises a cover plate portion (1122); A second connecting assembly (120), comprising a valve seat (121), a ferrule (122), a push piece (124) and a sealing piece; the valve seat (121) is provided with a second hole portion (121d), at least a portion of the push piece (124) and the ferrule (122) are located in the second hole portion (121d), and the push piece (124) and the ferrule (122) are distributed along the axial direction; the sealing piece is provided between the push piece (124) and the valve seat (121) and between the push piece (124) and the connecting pipe (300); When the joint portion (210) and the first hole section (1111a) are tightened, the cover plate portion (1122) abuts against the push piece (124) along the axial direction, and pushes against the sealing member between the push piece (124) and the connecting pipe (300), the valve seat (121) is provided with a push portion, the ferrule (122) includes a conical portion (122b), the push portion abuts against the conical portion (122b), the conical end of the conical portion (122b) can be deformed, the conical end is hard-sealed with the connecting pipe (300), and the conical end is hard-sealed with the push portion.

2. The joint assembly according to claim 1, characterized in that: The push member (124) includes an inner side and an outer side distributed in the radial direction, the outer side of the push member (124) is provided with a first annular groove (124b), and the inner side of the push member (124) is provided with a second annular groove (124a-1); the first annular groove (124b) and the second annular groove (124a-1) are respectively used to accommodate parts of the corresponding sealing members, the first annular groove (124b) and the second annular groove (124a-1) are staggered in the axial direction, the second annular groove (124a-1) is close to the cover plate portion (1122), and the second annular groove (124a-1) is open on the side facing the cover plate portion (1122).

3. The joint assembly according to claim 2, characterized in that: The second connection assembly (120) further comprises a gasket (125), and the gasket (125) is arranged between the sealing member between the push member (124) and the connection pipe (300) and the cover plate portion (1122).

4. The joint assembly according to claim 1, characterized in that: A limiting portion (121d-1) is formed in the second hole portion (121d), and the connecting pipe (300) inserted into the second hole portion (121d) can abut against the limiting portion (121d-1) along the axial direction.

5. The joint assembly according to claim 1, characterized in that: The valve seat (121) has a first abutment portion, and the connecting nut (111) has a second abutment portion. The first abutment portion and the second abutment portion can abut against each other in the axial direction. When the joint portion (210) and the first hole section (1111a) are in a threaded tightening state, the first abutment portion and the second abutment portion have a spacing in the axial direction.

6. The joint assembly according to claim 5, characterized in that: The valve seat (121) includes a thin neck portion (121a) and a thick neck portion (121b), a first step surface (121c) is formed between the thin neck portion (121a) and the thick neck portion (121b), the first step surface (121c) is the first abutment portion, and the connecting nut (111) further includes a second hole section (1111b), the thin neck portion (121a) and the second hole section (1111b) are slidably matched.

7. The joint assembly according to claim 1, characterized in that: An annular conical surface (121d-3) is formed in the second hole portion (121d), and the conical surface (121d-3) is the pushing portion.

8. The joint assembly according to claim 7, characterized in that: A second step surface (121d-2) is formed in the second hole portion (121d), and the second step surface (121d-2) is connected to the conical surface (121d-3); the ferrule (122) also includes a supporting portion (122a), and the supporting portion (122a) is located at the large diameter end of the conical portion (122b); when the joint portion (210) and the first hole section (1111a) are in a threaded tightening state, the push member (124) presses the supporting portion (122a) against the second step surface (121d-2).

9. The joint assembly according to any one of claims 1 to 8, characterized in that: When the joint portion (210) and the first hole section (1111a) are in a threaded tightening state, the valve seat (121) and the joint portion (210) are in direct contact with each other to achieve a hard sealing fit.

10. The joint assembly according to claim 9, characterized in that: The valve seat (121) has a first axial end face (121e) facing away from the cover plate portion (1122), and the first axial end face (121e) is provided with a step portion, the edge of the step surface of the step portion forms an annular first edge (121f), and the edge of the step side wall of the step portion forms an annular second edge (121g), and the joint portion (210) has a second axial end face (210a) facing the valve seat (121), and the second axial end face (210a) is an annular conical surface, and the first edge (121f) and the second edge (121g) and the second axial end face (210a) are abutted and sealed.

11. The joint assembly according to any one of claims 1 to 8, characterized in that: The connecting cap (112) comprises a cylindrical portion (1121) and a cover plate portion (1122), and at least a portion of the valve seat (121) is axially located inside the cylindrical portion (1121); the cylindrical portion (1121) and the connecting nut (111) are welded, or the connecting cap (112) and the connecting nut (111) are integrally arranged.

12. A valve device, characterized in that: It comprises a valve component, which comprises a joint part (210), a connecting pipe (300) and a joint assembly (100), wherein the joint assembly (100) is the joint assembly according to any one of claims 1 to 11, wherein the connecting nut (111) and the joint part (210) are threadedly connected, and the connecting pipe (300) is inserted into the second connecting assembly (120).

13. A method for assembling a valve device, characterized in that: Applicable to the valve device of claim 12, the assembly method comprising the following steps: arranging the valve component, the joint assembly (100) and the connecting pipe (300); Inserting the connecting pipe (300) into the joint assembly (100); The connecting nut (111) is screwed onto the joint portion (210) so that the joint portion (210) and the valve seat (121) of the second connecting component (120) are hard-sealed and matched, and the thread matching size of the joint portion (210) and the connecting nut (111) is continuously increased so that the cover plate portion (1122) is displaced toward the second connecting component (120), and the cover plate portion (1122) pushes against the second sealing member (123b); The thread matching size of the joint portion (210) and the connecting nut (111) is continuously increased, the cover portion (1122) pushes against the push member (124), the push member (124) pushes against the ferrule (122) and presses against the pushing portion, and the ferrule (122) is deformed to clamp the connecting pipe (300).

Images