Joint assembly, valve device and assembling method of valve device

Abstract

The invention provides a connector assembly, a valve device and an assembling method of the valve device, the connector assembly comprises a first connecting assembly, the first connecting assembly comprises a connecting nut and a connecting cap, and the connecting nut is in threaded connection with a connector part; the connecting cap comprises a cover plate part; the valve seat, the clamping sleeve, the abutting piece and the sealing piece are all annular; at least part of the abutting piece and the clamping sleeve are located in the valve seat, and the abutting piece and the clamping sleeve are distributed in the axial direction. Sealing pieces are arranged between the abutting and pushing piece and the valve seat and between the abutting and pushing piece and the connecting pipe. When the connector part and the first hole section are screwed up in a threaded mode, the cover plate part abuts against the sealing part between the abutting-pushing part and the connecting pipe in the axial direction, the cover plate part abuts against the abutting-pushing part, the abutting-pushing part abuts against the clamping sleeve, and a pushing part is further arranged on the inner wall of the second hole part and abuts against the clamping sleeve to clamp the connecting pipe. According to the connector assembly, the connecting pipe is convenient to insert, and sealing is reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing connection, and in particular to a joint assembly, a valve device and an assembling method of the valve device. Background Art

[0002] A valve component in the form of a stop valve or the like can be connected to a pipe through a joint assembly, and a seal is provided in the joint assembly to achieve a sealed assembly of the pipe and the joint assembly. However, in the related art, the compression amount of the seal is fixed, which makes the insertion of the pipe very difficult.

[0003] 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. Summary of the invention

[0004] 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.

[0005] The present application provides a joint assembly for realizing the connection between a joint part and a connecting pipe, characterized in that the joint assembly comprises:

[0006] A first connection assembly, comprising 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 comprises a first hole section, the first hole section is provided with an internal thread for threaded connection with the joint portion; the connecting cap comprises a cover plate portion;

[0007] The second connection assembly comprises a valve seat, a ferrule, a push piece and a sealing piece, all of which are annular; the valve seat is provided with a second hole portion, at least part of the push piece and the ferrule are located in the second hole portion, and the push piece and the ferrule are distributed along the axial direction; the sealing piece is provided between the push piece and the valve seat and between the push piece and the connecting pipe;

[0008] When the joint part and the first hole section are tightened, the cover plate part axially abuts against the push piece, and pushes against the sealing piece between the push piece 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.

[0009] 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.

[0010] The present application also provides a method for assembling a valve device, which is applicable to the above-mentioned valve device, and the assembly method comprises the following steps:

[0011] Configure the valve component, joint assembly and connecting pipe;

[0012] inserting the connecting pipe into the joint assembly;

[0013] The connecting nut is screwed onto the joint part, so that the joint part and the valve seat of the second connecting component are hard-sealed, and the thread matching size of the joint part and the connecting nut is continuously increased, so that the cover plate part is displaced toward the second connecting component, and the cover plate part pushes the sealing member between the pushing member and the connecting pipe;

[0014] 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 presses against the pushing part, and the ferrule is deformed to clamp the connecting pipe.

[0015] In this application, when the thread is tightened, the cover plate part presses 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 thread is 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, and the cover plate part 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 to ensure the connection reliability of the joint assembly and the connecting pipe. In other words, the joint assembly can take into account 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 with the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the valve device provided by an embodiment of the present invention during initial assembly.

[0017] Figure 2 for Figure 1 A magnified view of the middle A area;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of the connecting nut;

[0019] Figure 4 for Figure 3 A half-section view of the middle connecting nut along the axial direction;

[0020] Figure 5 for Figure 2A schematic structural diagram of a valve seat of a second connecting assembly;

[0021] Figure 6 for Figure 5 Axial section view of the middle valve seat;

[0022] Figure 7 for Figure 2 A schematic structural diagram of a ferrule of the second connecting component;

[0023] Figure 8 for Figure 7 Axial cross-sectional view of the middle ferrule;

[0024] Fig. 9 for Figure 2 A schematic structural diagram of the push member of the second connecting assembly;

[0025] Fig.10 for Fig. 9 An axial cross-sectional view of the middle thrust member;

[0026] Fig.11 for Figure 2 A schematic diagram of the structure of the middle connecting cap;

[0027] Fig.12 for Fig.11 An axial cross-sectional view of the middle connecting cap;

[0028] Fig.13 for Figure 2 Schematic diagram of the structure of the middle valve device after assembly;

[0029] Fig.14 A schematic flow chart of an assembly method of a valve device provided in an embodiment of the present application.

[0030] Figure 1-14 The reference numerals in the drawings are described as follows:

[0031] 100-connector assembly;

[0032] 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 plate portion;

[0033] 120-second connecting assembly, 121-valve seat, 121a-thin neck, 121b-thick neck, 121c-first step surface, 121d-second hole, 121d-1-limiting portion, 121d-2-second step surface, 121d-3-conical surface, 121e-first axial end surface, 121f-first edge, 121g-second edge, 122-ferrule, 122a-abutment portion, 122b-conical portion, 123a-first sealing member, 123b-second sealing member, 124-thrust member, 124a-third hole, 124a-1-second annular groove, 124b-first annular groove, 125-gasket

[0034] 200-valve component, 210-connector;

[0035] 300-Connecting pipe. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the valve device provided by an embodiment of the present invention during initial assembly.

[0038] This embodiment provides a joint assembly 100 for achieving connection between a joint portion 210 and a connecting pipe 300. The present application does not limit the specific application scenario of the joint assembly 100, and those skilled in the art can determine it according to specific circumstances. Figure 1 In the embodiment, the joint assembly 100 can be applied to the connection between the connecting pipe 300 and the valve component 200. In this application scenario, the joint part 210 can be a joint of the valve component 200, and more specifically, it can be a joint of the stop valve. The connecting pipe 300 can connect the stop valve and equipment such as an air-conditioning outdoor unit or indoor unit. For another example, the joint part 210 can also be a joint of other structures, such as a joint of another connecting pipe. Then the above-mentioned joint assembly 100 can also be applied to the connection of two connecting pipes, etc.

[0039] Please continue to refer to Figure 2 , Figure 2 for Figure 1 Magnified view of area A.

[0040] The joint assembly 100 comprises a first connecting assembly 110 and a second connecting assembly 120. The first connecting assembly 110 comprises a connecting nut 111 and a connecting cap 112. Figure 2It can be seen that the connection nut 111 and the connection cap 112 in the first connection assembly 110 are assembled together to form a cylindrical structure with a bottom. The connection nut 111 is used to connect with the joint part 210, the second connection assembly 120 is used to connect with the connection pipe 300, and the connection cap 112 is connected to the connection nut 111 and can act on the second connection assembly 120. Each part is described in detail below.

[0041] like Figure 3 , 4 As shown, Figure 3 for Figure 2 A schematic structural diagram of the middle connecting nut 111; Figure 4 for Figure 3 A half-section view of the middle connecting nut 111 along the axial direction.

[0042] 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, and 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 and is 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 segment 1111a is used to be connected to the joint portion 210. Specifically, as Figure 1 , Figure 2 As shown, the valve component 200 may be provided with a joint portion 210, and the joint portion 210 is provided with an external thread for cooperating with the internal thread of the first hole section 1111a for threaded connection.

[0043] The second connecting assembly 120 in this embodiment includes a plurality of parts, specifically a valve seat 121 , a ferrule 122 , a sealing member 123 and a thrust member 124 , and all of these parts are annular structures.

[0044] Please see Figure 5 , 6 , Figure 5 for Figure 2 A schematic structural diagram of the valve seat 121 of the second connecting assembly 120; Figure 6 for Figure 5 Axial cross-sectional view of the middle valve seat 121.

[0045] Combination Figure 2It is understood that the valve seat 121 in the second connection assembly 120 and the second hole section 1111b of the connection nut 111 are slidably matched, and the second hole section 1111b can be, for example, a light hole section, and is certainly not limited to the light hole section 1111b, as long as it does not affect the relative sliding of the valve seat 121 and the connection nut 111 along the axial direction. The valve seat 121 can be axially abutted and sealed with the joint part 210 to achieve a seal between the joint assembly 100 and the joint part 210. The specific form of the abutment seal is not limited here, and those skilled in the art can set it according to actual needs, as long as it can meet the requirements of use.

[0046] For example, Figure 2 , 6 As shown, the valve seat 121 has a first axial end face 121e facing the joint portion 210, the axial end face being the end face of the axial end, and 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 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. Figure 2 As shown, the joint part 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. The first edge 121f and the second edge 121g of the valve seat 121 can abut against the second axial end face 210a, so that the valve seat 121 and the joint part 210 can be abutted against each other in the axial direction. The sealing method is a line seal, and it is a two-line seal, which is more reliable, simple to process, highly reliable, and has a relatively low risk of leakage. The first edge 121f and the second edge 121g here can be linear edges, or they can be curved edges formed by chamfering.

[0047] It can be seen that the first axial end face 121e of the valve seat 121 may not be provided with a step portion. In this embodiment, the valve seat 121 is provided with a second hole portion 121d that penetrates in the axial direction, and the inner edge of the first axial end face 121e itself can form an edge, which can be abutted and sealed with the conical surface 210a, that is, a line seal is formed. It can be understood that when the joint portion 210 has an edge, the first axial end face 121e of the valve seat 121 including the conical surface can also achieve abutment line seal. Of course, the valve seat 121 and the joint portion 210 can also be sealed by a surface seal.

[0048] Look again Figure 6The valve seat 121 in this embodiment is provided with a second hole portion 121d, and the second hole portion 121d penetrates 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.

[0049] The structural form of the limiting portion 121d-1 is not limited here, as long as it can meet the requirements of use. Figure 6 As shown, the limiting portion 121d-1 may be an annular boss disposed on the inner wall of the second hole portion 121d; for example, the second hole portion 121d may be provided with a variable diameter to form a limiting step surface on the inner wall of the second hole portion 121d, and then the axial limiting is performed through the limiting step surface and the connecting pipe 300. It should be understood that the second hole portion 121d may also be a non-through hole, for example, the limiting portion 121d-1 may be a partition plate.

[0050] You can continue to refer to Figure 7 , 8 , Figure 7 for Figure 2 A schematic structural diagram of the ferrule 122 of the second connecting assembly 120; Figure 8 for Figure 7 Axial cross-sectional view of the middle ferrule 122.

[0051] 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.

[0052] Look again Fig. 9 , 10 , Fig. 9 for Figure 2 A schematic structural diagram of the push member 124 of the second connecting assembly 120; Fig.10 for Fig. 9 An axial cross-sectional view of the middle push member 124.

[0053] The push member 124 is a sleeve-shaped structure, having a third hole portion 124a extending axially, through which the connecting pipe 300 can pass. Figure 2It is understood that the ferrule 122 and the push piece 124 are axially distributed in the valve seat 121 and are slidably matched with the valve seat 121, and the ferrule 122 is closer to the joint part 210. The connecting pipe 300 passes through the push piece 124 and the ferrule 122 in sequence along the axial direction. The push piece 124 has an inner side and an outer side distributed in 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 a seal, and a part of the seal is located in the corresponding annular groove. The seal is, for example, a sealing ring structure, such as Figure 2 As shown, the seal located in the first annular groove 124b is the first seal 123a, which is used to seal the valve seat 121 and the thrust piece 124, and the seal 123 located in the second annular groove 124a-1 is the second seal 123b, which is used to seal the connecting pipe 300 and the thrust piece 124.

[0054] Specifically, the first annular groove 124 is a groove, and the second annular groove 124a-1 is as shown in FIG. Fig.10 As shown, 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 small holes form a second annular groove 124a-1, so that 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.

[0055] Please continue to refer to Fig.11 , 12 , Fig.11 for Figure 2 A schematic structural diagram of the middle connecting cap 112; Fig.12 for Fig.11 Axial cross-sectional view of the connecting cap 112.

[0056] The connecting cap 112 includes a cylindrical portion 1121 and a cover portion 1122. The cylindrical portion 1121 is sleeved on the valve seat 121, and the cylindrical portion 1121 is connected to the connecting nut 111. The cover portion 1122 is covered at one axial end of the cylindrical portion 1121, specifically, at one 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 piece 124 and the ferrule 122, and abut against the limit portion 121d-1.

[0057] like Figure 2As shown, 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 one side of the cover portion 1122, a gasket 125 can be provided on the side of the second seal 123b toward the cover portion 1122, so as to facilitate the transmission of 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. Of course, the cover portion 1122 can also directly push the second seal 123b.

[0058] Combination Figure 1 , 2 It is understood that when the valve seat 121 and the connecting nut 111 abut against each other axially, there is a first sliding gap between the thrust member 124 and the cover plate portion 1122, and the first sliding gap at this time is X1, and 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.

[0059] At the beginning of the specific assembly, the connecting pipe 300 can be inserted into the second connecting assembly 120. Due to the existence of the first sliding gap X1, the second sealing member 123b can have no compression force in the axial direction, so the compression amount of the second sealing member 123b is relatively small, and the plug-in assembly of the connecting pipe 300 is relatively easy. After the connecting pipe 300 is abutted against the limiting portion 121d-1 and the installation is completed, the joint part 210 can be installed, and the joint part 210 of the valve component 200 and the connecting nut 111 are threadedly connected. By adjusting the thread matching size of the joint part 210 and the connecting nut 111, the joint part 210 and the valve seat 121 can be abutted in the axial direction to achieve contact sealing between the joint part 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 together, and then the valve seat 121 produces an axial displacement, 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 thrust piece 124 to reduce the first sliding gap. When the displacement is X1, the first sliding gap is eliminated, and the compression amount of the second sealing member 123 reaches the maximum, thereby improving the sealing performance between the second connecting component 120 and the connecting pipe 300.

[0060] Please combine Fig.13 understand, Fig.13 for Figure 2 Schematic diagram of the structure of the middle valve device after assembly.

[0061] like Fig.13As shown, when the connecting nut 111 and the joint part 210 are continuously tightened, the cover plate part 1122 of the connecting cap 112 continuously approaches the valve seat 121, pushing the gasket 125 to compress the second sealing member 123b. After moving a distance X1, the cover plate part 1122 will contact the push member 124 and begin to push the push member 124 axially. It can be seen that the cover plate part 1122 can push the push member 124 directly or indirectly. The cover plate part 1122 pushing the push member 124 can further reduce the second sliding gap. When the cover plate part 1122 starts to push the push member 124, the second sliding clearance has been reduced from X2 to X2-X1, and the push member 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 push portion, and the push portion 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 push portion.

[0062] 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.

[0063] like Figure 2 , 8 As shown, the ferrule 122 includes a sleeve-shaped conical portion 122b and an annular abutting portion 123b 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 and the conical surface 121d-3 are connected. The abutting portion 123b 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 surface of the valve seat 121, X2 is eliminated, as shown in FIG. Fig.13As shown, at this time, X3 can also be eliminated synchronously, that is, when the ferrule 122 is at its maximum deformation, the abutting portion 122b also abuts against the second step surface 121d-2. Of course, X3 can also be smaller than X2-X1, that is, when the abutting portion 122b abuts against the second step surface 121d-2, the cover plate portion 1122 does not need to abut against the valve seat 121, as long as the abutting portion 122b abuts against the second step surface 121d-2, the deformation of the ferrule 122 is sufficient to clamp the connecting pipe 300, but the cover plate portion 1122 abuts against the valve seat 121 at the same time, and the structural stability is more reliable. It should be known that the ferrule 122 may not be provided with the turning portion 122b. On the one hand, the abutting portion 122b is provided to facilitate the abutment of the push member 124. In addition, the structure is more stable when it abuts against the second step surface 121d-2.

[0064] Here, the deformation of the ferrule 122 to clamp the connecting pipe 300 mainly relies on the conical surface 121d-3 to produce a radial clamping force component. 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 conical setting is conducive to the deformation of its conical end to achieve a hard seal. It can be seen that the inner wall of the valve seat 121 can also be provided with other pushing parts other than the conical surface 121d-3. For example, the pushing part can be an annular boss. The conical part 122a is conical. When the conical part 122a passes through the annular boss, it can be gradually pressed by the annular boss, and then the connecting pipe 300 is clamped. That is, during the axial movement of the ferrule 122, the pushing part will generate a radial force component on the ferrule 122 to force the conical end of the ferrule 122 to deform and clamp the connecting pipe 300. At the same time, the ferrule 122, the valve seat 121 and the connecting pipe 300 all form a hard seal.

[0065] Combined with the above analysis, it can be seen that the embodiments of the present application have the following technical effects:

[0066] Through the sliding arrangement between the valve seat 121 and the connecting nut 111, the compression amount of the second sealing member 123b used for contacting and sealing the connecting pipe 300 can be adjusted. When the connecting pipe 300 is first installed, the valve seat 121 can be axially opposed to the connecting nut 111, and the compression amount of the second sealing member 123b can be relatively small, which can facilitate the installation of the connecting pipe 300; after the connecting pipe 300 is installed, by adjusting the thread matching size of the connecting pipe 200 and the connecting nut 111, the valve seat 121 and the connecting cap 112 can be driven to produce relative displacement, which can push the second sealing member 123b to increase the compression amount of the second sealing member 123b, thereby improving the sealing performance between the connecting pipe 300 and the valve seat 121, so as to ensure the connection reliability of the joint assembly 100 and the connecting pipe 300.

[0067] That is to say, the joint 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 setting of the ferrule 122 can add a hard seal, which is combined with the soft seal of the seal to improve the sealing performance with the connecting pipe 300.

[0068] In addition, the valve seat 121 and the joint part 210 are directly abutted and sealed, with fewer sealing points and better sealing, which can reduce the risk of leakage. Furthermore, it can be abutment line sealing as described above, which is more reliable.

[0069] In this embodiment, in theory, the cover plate portion 1122 can push the ferrule 122 through the push seal, but the ferrule 122 is hard-sealed and requires a large push force. In fact, the seal is difficult to withstand such a push force. Therefore, a push member 124 is provided to transmit the push force. After the second seal 123b is compressed into place, the push member 124 is used to transmit the push force to the ferrule 122. At this time, due to the existence of the push member 124, it is necessary to provide seals on both sides to achieve the sealing of 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 can be understood that the two can be arranged without staggering. However, the push member 124 at this time needs to be grooved at the same time on the inner and outer sides of the same axial position. In comparison, the staggered arrangement is easier to ensure the strength of the push member 124.

[0070] Recombination Figure 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 may include a thin neck 121a and a thick neck 121b, and the axial projection area of ​​the thin neck 121a may be smaller than the thick neck 121b, so that a first step surface 121c may be formed between the thin neck 121a and the thick neck 121b, and the first step surface 121c serves as a first abutting portion; the connecting nut 111 may have a third axial end surface 112( Figure 2 In the specific assembly, the narrow neck portion 121a can be slidably assembled in the second hole section 1111b, and the first step surface 121c can be axially abutted with the third axial end surface 112 to achieve axial abutment between the valve seat 121 and the connecting nut 111.

[0071] 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 may also be adopted as long as they can meet the requirements of use. Exemplarily, the second abutment portion may 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 ( Figure 6The left end face in the figure), the first axial end face 121e may be the first abutting portion, and the valve seat 121 may abut against each other axially through the first axial end face 121e and the limiting structure in the first hole portion 1111, which is also feasible.

[0072] Here, the valve seat 121 and the connecting nut 111 are arranged to be able to abut in the axial direction, so that when the connecting pipe 300 is inserted, the valve seat 121 will not slide out along the connecting nut 111, which is convenient for the connecting pipe 300 to be inserted in place. In the subsequent description of the assembly process, it can be seen that when the joint part 210 and the first hole section 1111a are in the process of thread tightening, the first abutting part and the second abutting part will have a spacing in the axial direction, that is, they are no longer abutted. Therefore, in fact, if the valve seat 121 and the connecting nut 111 do not abut in the axial direction, the insertion of the connecting pipe 300 can also be achieved. At this time, it is extended to understand that because the connecting nut 111 and the valve seat 121 abut in the axial direction, the connecting nut 111 and the connecting cap 112 are separately arranged to load the valve seat 121. If it is not limited to abutting in the axial direction, the connecting nut 111 and the connecting cap 112 can also be arranged as a whole, for example, the barrel 1121 of the connecting nut 111 and the connecting cap 112 are arranged with roughly equal diameters. Similarly, in the above embodiment, it is mentioned that the limiting portion 121d-1 is provided to limit the connection pipe 300 so as to ensure that the connection pipe 300 is inserted in place, but in fact, such limiting may not be performed, as long as the connection pipe 300 can pass through the ferrule 122, it can be clamped by the ferrule 122 in the subsequent assembly process. However, as mentioned above, the limiting portion 121d-1 is provided, and the connection nut 111 and the valve seat 121 are arranged to abut against each other along the axial direction to facilitate assembly.

[0073] like Figure 1 As shown, the cylindrical portion 1121 and the connecting nut 111 can be welded and fixed. In this way, the connection reliability between the connecting cap 112 and the connecting nut 111 can be relatively high, and have a high sealing performance. At the same time, since there is no need to set threads on the cylindrical portion 1121, the thickness of the cylindrical portion 1121 can be relatively small, which is also conducive to reducing the weight, structural size and cost of the joint assembly 100 provided by the present invention.

[0074] Specifically, Figure 4 As shown, the outer wall surface of the connecting nut 111 may have a fourth axial end face 1112 , the fourth axial end face 1112 and the third axial end face 112 may be staggered in the axial direction, the cylindrical portion 1121 may abut against the fourth axial end face 1112 , and then may be welded to the fourth axial end face 1112 .

[0075] 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 axially connected and can drive the lower part of the connecting cap 112 to move synchronously axially relative to the valve seat 121.

[0076] The present application also provides a valve device, including a valve component, a connecting pipe and the above-mentioned joint assembly 100. The valve component has a joint portion 210. The connecting nut 111 of the joint assembly 100 is threadedly connected to the joint portion 210, and the connecting pipe is inserted into the second connecting assembly 120 and abuts against the limiting portion 121d-1 to achieve the connection between the connecting pipe and the valve component.

[0077] Please refer to Fig.14 , Fig.14 A schematic flow chart of an assembly method of a valve device provided in an embodiment of the present application.

[0078] The present application also provides a valve device assembly method, which is applicable to the above-mentioned valve device. Fig.14 As shown, the assembly method includes the following steps S1 to S3.

[0079] Step S1 , configuring a valve component, a joint assembly 100 and a connecting pipe 300 .

[0080] Step S2, inserting the connecting pipe 300 into the second connecting assembly 120 in the joint assembly 100, specifically, the connecting pipe 300 and the limiting portion 121d-1 can be abutted against each other along the axial direction, indicating that the connecting pipe is plugged in place.

[0081] 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 hard sealing, and continue to increase the thread matching 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, and 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.

[0082] 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 the direct abutment of the valve seat 121 of the connecting component 120, the second node is the cover part 1122 pushing the second sealing member 123b into place and contacting the push member 123, and the third node is the cover part 1122 pushing the push member 124, indirectly pushing the ferrule 122, and causing the ferrule 122 to abut and deform with the push part (specifically the conical surface 121d-3) to clamp the connecting pipe 300.

[0083] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present 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 (110) 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 (1111) 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 (120); 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).

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