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 sealing seat, the abutting part and the sealing piece are all annular. The sealing seat is positioned in the valve seat; a sealing piece is arranged between each sealing seat and the corresponding abutting part; when the connector part and the first hole section are tightened in a threaded mode, the cover plate part abuts against the abutting part in the axial direction so as to abut against the sealing piece and the conical part of the sealing base, and a pushing part is further arranged on the inner wall of the second hole part and abuts against the conical part so as 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 sealed connection, and particularly relates to a joint assembly, a valve device, and an assembly method of the valve device. Background Art

[0002] Valve components in the form of globe valves can be connected through a joint assembly and a connecting pipe. A seal is provided inside the joint assembly to achieve the sealed assembly of the connecting pipe and the joint assembly. However, in the related art, the compression amount of the seal is fixed, resulting in very difficult insertion of the connecting pipe.

[0003] Therefore, how to provide a solution to overcome or alleviate the above defects remains a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The purpose of the present application is to provide a joint assembly in which the insertion of the connecting pipe is more convenient and the sealing is more reliable.

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

[0006] A first connection assembly, including a connecting nut and a connecting cap connected together. The connecting nut is provided with a first hole portion, and the first hole portion includes a first hole section. The first hole section is provided with internal threads for threaded connection with the joint head; the connecting cap includes a cover plate portion;

[0007] A second connection assembly, including a valve seat, a seal seat, a abutting portion, and a seal; the valve seat is provided with a second hole portion, the seal seat is located inside the second hole portion, and a part of the abutting portion is located inside the second hole portion; the seal is provided between the seal seat and the abutting portion;

[0008] When the joint head is tightened with the first hole section, the cover plate portion axially abuts against the abutting portion to push the seal and the seal seat. The valve seat is provided with a pushing portion. One end of the seal seat close to the joint head is a conical portion. The pushing portion abuts against the conical portion. The conical portion can be deformed to form a hard seal with the connecting pipe, and the conical portion forms a hard seal with the pushing portion.

[0009] The present application also provides a valve device, including a valve component. The valve component includes a joint head, a connecting pipe, and a joint assembly. The joint assembly is the joint assembly described in any one of the above, the connecting nut is threadedly connected with the joint head, and the connecting pipe is inserted into the second connection assembly.

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

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

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

[0013] Screw the connecting nut onto the joint head, so that the joint head and the valve seat of the second connecting component are in hard seal fit, and continuously increase the thread fit dimension between the joint head and the connecting nut, so that the cover plate portion displaces towards the second connecting component, and the cover plate portion pushes against the abutting portion to push against the sealing member and the sealing seat until the conical portion abuts tightly against the pushing portion, and the conical portion deforms to clamp the connecting pipe.

[0014] In the application solution, when the threading is completed, the cover plate portion presses against the sealing member between the sealing seat and the abutting portion. Then, before the connecting pipe is inserted into the second connecting component and before the threading is tightened, the compression amount of the sealing member is small, which is convenient for the installation of the connecting pipe; after the installation of the connecting pipe is completed, by adjusting the thread fit dimension between the connecting pipe and the connecting nut, the valve seat and the connecting cap can be driven to generate relative displacement, and the cover plate portion can push against the sealing member to increase the compression amount, 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. That is to say, the joint assembly can balance the convenience of installation and the reliability of connection. Moreover, the setting of the conical portion of the sealing seat can add a hard seal, which is combined with the soft seal of the sealing member to improve the sealing performance with the connecting pipe. Especially when the connecting pipe is a pipe structure with a small hardness and easy to deform such as aluminum, the effect of the two seals on improving the sealing performance is particularly obvious. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the valve device provided by the embodiment of the present invention during initial assembly.

[0016] Figure 2 is Figure 1 an enlarged view of part A in

[0017] Figure 3 is Figure 2 a schematic structural diagram of the connecting nut in

[0018] Figure 4 is Figure 3 a half-sectional view of the connecting nut along the axial direction in

[0019] Figure 5 is Figure 2 a schematic structural diagram of the valve seat of the second connecting component in

[0020] Figure 6 is Figure 5 the axial sectional view of the middle valve seat;

[0021] Figure 7 is Figure 2 the structural schematic diagram of the sealing seat of the second connection component in the middle;

[0022] Figure 8 is Figure 2 the structural schematic diagram of the abutting part in the second connection component in the middle;

[0023] Figure 9 is Figure 2 the structural schematic diagram of the seal in the second connection component in the middle;

[0024] Figure 10 is Figure 9 the enlarged view of part B in the middle;

[0025] Figure 11 is Figure 2 the structural schematic diagram of the connection cap in the middle;

[0026] Figure 12 is Figure 11 the axial sectional view of the connection cap in the middle;

[0027] Figure 13 is Figure 2 the structural schematic diagram when the valve device is assembled completely in the middle;

[0028] Figure 14 is the schematic flow chart of the assembling method of the valve device provided by the embodiment of the present application.

[0029] Figures 1 - 14 The descriptions of the reference numerals in the drawings are as follows:

[0030] 100 - joint assembly;

[0031] 110 - first connection component, 111 - connection nut; 1111 - first hole part, 1111a - first hole section, 1111b - second hole section, 1112 - third axial end face, 1113 - fourth axial end face; 112 - connection cap, 1121 - cylindrical part, 1122 - cover plate part; 112a - through hole;

[0032] 120 - Second connection component, 121 - Valve seat, 121a - Narrow neck portion, 121b - Thick neck portion, 121c - First stepped surface, 121d - Second hole portion, 121d-1 - Limiting portion, 121d-2 - Second stepped surface, 121d-3 - Tapered surface, 121e - First axial end face, 121f - First edge, 121g - Second edge, 1222a - Annular end face, 123 - Sealing member, 123a - Fifth hole portion; 1231 - Outer protrusion; 1232 - Inner protrusion; 122 - Sealing seat, 122a - Third hole portion, 1221 - Conical portion, 1222 - Main body portion; 1222a - Annular end face; 124 - Abutting portion; 1241 - Large diameter portion; 1242 - Small diameter portion; 124a - Fourth hole portion;

[0033] 200 - Valve component, 210 - Connector portion;

[0034] 300 - Connecting pipe. Detailed implementation manners

[0035] To enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0036] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the valve device provided by the embodiment of the present invention during initial assembly.

[0037] This embodiment provides a connector assembly 100 for realizing the connection between the connector portion 210 and the connecting pipe 300. The present application does not limit the specific application scenario of the connector assembly 100, and those skilled in the art can determine it according to specific circumstances. Exemplarily, 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 the connector of the valve component 200, more specifically, the connector of a globe valve. The connecting pipe 300 can communicate the globe valve with devices such as an air conditioner outdoor unit or an indoor unit; for another example, the connector portion 210 can also be the connector of other structures, such as the connector of another connecting pipe. Then, the above-mentioned connector assembly 100 can also be applied to the connection of two connecting pipes, etc.

[0038] Please continue to refer to Figure 2 , Figure 2 which is Figure 1 an enlarged view of part A in

[0039] The above-mentioned connector assembly 100 includes a first connection component 110 and a second connection component 120. The first connection component 110 includes a connection nut 111 and a connection cap 112. Starting from Figure 2It can be seen that in the first connection component 110, the connection nut 111 and the connection cap 112 are assembled together to form a cylindrical structure with a bottom. The connection nut 111 is used to connect with the joint head 210, the second connection component 120 is used to connect with the connection pipe 300, the connection cap 112 is connected to the connection nut 111 and can act on the second connection component 120. The following will describe each part in detail.

[0040] As Figure 3 , 4 shown, Figure 3 Figure Figure 2 is a schematic structural view of the connection nut 111 in Figure 4 Figure Figure 3 is a half-sectional view of the connection nut 111 along the axial direction in

[0041] In this embodiment, the connection nut 111 is provided with a first hole portion 1111. The first hole portion 1111 penetrates the connection nut 111 along the axial direction. The first hole portion 1111 includes a first hole section 1111a and a second hole section 1111b. The first hole section 1111a and the second hole section 1111b are distributed along the axial direction of the first hole portion 1111. Among them, the first hole section 1111a is a threaded hole and is provided with internal threads. The first hole section 1111a and the second hole section 1111b can be arranged adjacent to each other along the axial direction, or a separation structure in the form of an annular protrusion, a stepped surface, etc. can be provided on the inner wall surface of the first hole portion 1111 to separate the first hole section 1111a and the second hole section 1111b. In this way, the axial dimensions of the first hole section 1111a and the second hole section 1111b can be conveniently controlled. The first hole section 1111a is used to connect with the joint head 210. Specifically, as Figure 1 , Figure 2 shown, the valve component 200 can be provided with a joint head 210, and the joint head 210 is provided with external threads for thread connection with the internal threads of the first hole section 1111a.

[0042] In this embodiment, the second connection component 120 includes multiple parts, specifically including a valve seat 121, a sealing seat 122, a abutting portion 124, and a sealing member 123. The sealing member 123 is specifically one, and these parts are all annular structures.

[0043] Please see Figure 5 , 6 , Figure 5 Figure Figure 2 is a schematic structural view of the valve seat 121 of the second connection component 120 in Figure 6 Figure Figure 5 is an axial sectional view of the valve seat 121 in

[0044] Combined with Figure 2It is understood that the valve seat 121 in the second connecting component 120 and the second hole section 1111b of the connecting nut 111 are in sliding fit. The second hole section 1111b can be, for example, a smooth hole section, but of course it is not limited to being a smooth hole section 1111b, 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 joint head 210 to achieve sealing between the joint assembly 100 and the joint head 210. The specific form of the abutting seal is not limited herein, and those skilled in the art can set it according to actual needs as long as it can meet the usage requirements.

[0045] Exemplarily, as Figure 2 , 6 shown, the valve seat 121 has a first axial end face 121e facing the joint head 210. The axial end face is the end face of the axial end. The first axial end face 121e is provided with a stepped portion. The stepped portion is located inside the first axial end face 121e. The edge of the stepped surface of the stepped portion forms an annular first edge 121f, and the edge of the stepped side wall of the stepped portion forms an annular second edge 121g. As Figure 2 shown, the joint head 210 has a second axial end face 210a facing the valve seat 121. The second axial end face 210a is an annular conical surface. Both the first edge 121f and the second edge 121g of the valve seat 121 can abut on the second axial end face 210a. In this way, the valve seat 121 and the joint head 210 can be axially abutted and sealed. This sealing method is line sealing, and it is two-line sealing. The sealing is relatively reliable, the processing is simple, the reliability is high, and the risk of leakage is relatively low. Here, the first edge 121f and the second edge 121g can be linear edges or arc-shaped edges formed by chamfers.

[0046] It can be known that the first axial end face 121e of the valve seat 121 does not need to be provided with a stepped portion either. In this embodiment, the valve seat 121 is provided with a second hole portion 121d axially penetrating through. Then, the inner edge of the first axial end face 121e itself can form an edge, which can abut and seal against the second axial end face 210a, that is, form a line seal. It can be understood that when the joint head 210 has an edge, the first axial end face 121e of the valve seat 121 including a conical surface can also achieve abutting line sealing. Of course, the valve seat 121 and the joint head 210 can also be sealed by a surface sealing method.

[0047] Looking again Figure 6, in this embodiment, the valve seat 121 is provided with a second hole portion 121d. The second hole portion 121d axially penetrates the valve seat 121. A limiting portion 121d-1 is provided on the inner wall surface of the second hole portion 121d for limiting 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, facilitating the operator to determine that the connecting pipe 300 is installed in place.

[0048] The structural form of the limiting portion 121d-1 is not limited herein as long as it can meet the usage requirements. Exemplarily, as Figure 6 shown, the limiting portion 121d-1 can be an annular boss provided on the inner wall surface of the second hole portion 121d; for example, it can also be set by changing the diameter of the second hole portion 121d to form a limiting step surface on the inner wall of the second hole portion 121d, and then axially limit the connecting pipe 300 through this limiting step surface. It should be understood that the second hole portion 121d can also be a non-penetrating hole. For example, the limiting portion 121d-1 is a partition plate.

[0049] Reference can be continued to Figure 7 , Figure 7 is Figure 2 a schematic structural view of the sealing seat 122 of the second connection assembly 120 in

[0050] The sealing seat 122 is located in the second hole portion 121d of the valve seat 121. The sealing seat 122 is used to clamp the connecting pipe 300 to realize the connection between the joint assembly 100 and the connecting pipe 300. The sealing seat 122 includes a conical portion 1221 in this embodiment. Specifically, one end of the sealing seat 122 close to the joint portion 210 is the conical portion 1221. The sealing seat 122 further includes a main body portion 1222. The main body portion 1222 and the conical portion 1221 are axially distributed. The conical portion 1221 is connected to the middle of the main body portion 1222. The outer diameter of the main body portion 1222 is greater than the maximum outer diameter of the conical portion 1221.

[0051] The sealing seat 122 is a sleeve-like structure with a third hole portion 122a axially penetrating. The connecting pipe 300 can pass through the third hole portion 122a. Combining Figure 2It is understood that the sealing seat 122 is in sliding fit with the valve seat 121. Specifically, the main body portion 1222 is in sliding fit with the valve seat 121, and the conical portion 1221 is closer to the joint portion 210. The connecting pipe 300 axially passes through the main body portion 1222 and the conical portion 1221 in sequence. The main body portion 1222 of the sealing seat 122 has an inner side and an outer side distributed radially. The inner side is the side closer to the axial center line of the sealing seat 122, and the outer side is the side away from the axial center line. The outer side of the sealing seat 122 is in sliding fit with the valve seat 121, and the inner side of the sealing seat 122 is in sliding fit with the connecting pipe 300.

[0052] As Figures 8 - 10 shown, Figure 8 it is Figure 2 a schematic structural view of the abutting portion 124 in the second connection assembly 120 in Figure 9 it is Figure 2 a schematic structural view of the seal 123 in the second connection assembly 120 in Figure 10 it is Figure 9 an enlarged view of part B in

[0053] Combined with Figure 2 it is understood that in this embodiment, a part of the abutting portion 124 is located in the second hole portion 121d of the valve seat 121, and a part is located outside the valve seat 121. The seal 123 is axially arranged between the sealing seat 122 and the abutting portion 124. When the connecting pipe 300 is inserted into the second connection assembly 120, it sequentially passes through the abutting portion 124, the seal 123, and the sealing seat 122.

[0054] Please continue to refer to Figure 11 and 12 , Figure 11 it is Figure 2 a schematic structural view of the connecting cap 112 in Figure 12 it is Figure 11 an axial sectional view of the connecting cap 112 in

[0055] The connecting cap 112 includes a cylindrical portion 1121 and a cover plate portion 1122. The cylindrical portion 1121 is sleeved outside the valve seat 121, and the cylindrical portion 1121 is connected to the connecting nut 111. The cover plate portion 1122 covers one axial end of the cylindrical portion 1121. Specifically, it covers the end of the cylindrical portion 1121 away from the joint portion 210. The cover plate portion 1122 serves as the bottom of the cylindrical portion 1121. The cover plate portion 1122 and the cylindrical portion 1121 can be an integral structure or a split-fixed structure. The cover plate portion 1122 is a ring-shaped plate structure with a through hole 112a. The connecting pipe 300 can pass through the through hole 112a of the cover plate portion 1122, and then pass through the abutting portion 124, the seal 123, and the sealing seat 122, and abut against the limiting portion 121d-1.

[0056] Combined with Figure 1 and 2It is understood that when the valve seat 121 and the connecting nut 111 abut against each other axially, there is a gap or no gap between the abutting portion 124 and the cover plate portion 1122, but the cover plate portion 1122 does not apply an abutting pressure to the abutting portion 124.

[0057] Specifically, at the beginning of the assembly, the connecting pipe 300 can be first inserted into the second connecting assembly 120. At this time, there is no axial compression force on the seal 123, so the compression amount of the seal 123 is zero or relatively small, and the insertion and assembly of the connecting pipe 300 is relatively easy. After the connecting pipe 300 abuts against the limiting portion 121d-1 and is installed, the connector 210 can be installed, and the connector 210 of the valve member 200 and the connecting nut 111 are threadedly connected. By adjusting the threaded fit size between the connector 210 and the connecting nut 111, the connector 210 and the valve seat 121 can be axially abutted to achieve contact sealing between the connector 210 and the valve seat 121.

[0058] Then, continuously increase the threaded fit size between the connector 210 and the connecting nut 111. Since the connector 210 and the valve seat 121 have already abutted, the axial position of the valve seat 121 does not change. In this way, rotating the connecting nut 111 can drive the connecting cap 112 to move axially together, and then generate an axial displacement relative to the valve seat 121, that is, it can drive the cover plate portion 1122 of the connecting cap 112 to approach the valve seat 121 and the abutting portion 124 for displacement, so as to push the abutting portion 124 to move towards the connector 210, and then compress the seal 123, so that the seal 123 deforms to abut tightly against the inner wall of the second hole portion 121d of the valve seat 121 and the outer wall of the connecting pipe 300, thereby exerting a sealing function. At the same time, when the seal 123 deforms, the thrust of the abutting portion 124 is also transmitted to the seal seat 122. The conical portion 1221 of the seal seat 122 moves axially, and a pushing portion is formed on the inner wall of the second hole portion 121d of the valve seat 121. The pushing portion is specifically an annular conical surface 121d-3. During the axial movement of the conical portion 1221, the conical portion 1221 will be compressed by the conical surface 121d-3 and deformed to clamp the connecting pipe 300, that is, the conical portion 1221 is in hard sealing fit with the connecting pipe 300 and also in hard sealing fit with the pushing portion.

[0059] Here, when the conical portion 1221 of the seal seat 122 clamps the connecting pipe 300, a hard seal will be formed, that is, the conical portion 1221 can form a hard seal, which is combined with the soft seal of the seal 123 to improve the sealing performance between the second connecting assembly 120 and the connecting pipe 300.

[0060] Such as Figure 2 、 7As shown, the radial dimension of the main body portion 1222 is greater than that of the conical portion 1221. The conical portion 1221 is connected to the middle of the main body portion 1222. At this time, the main body portion 1222 has an annular end face 1222a facing the joint portion 210. The inner wall of the second hole portion 121d of the valve seat 121 further includes a second step surface 121d-2. The second step surface 121d-2 is connected to the conical surface 121d-3. The annular end face 1222a and the second step surface 121d-2 are arranged opposite to each other, and there is a sliding gap therebetween. The sliding gap is X at the initial assembly position. When the annular end face 1222a and the second step surface 121d-2 are in contact, the deformation amount of the conical portion 1221 reaches the maximum, which is sufficient to clamp the connecting pipe 300, and the deformation amount of the seal 123 also reaches the maximum.

[0061] Here, the deformation of the conical portion 1221 of the seal seat 122 to clamp the connecting pipe 300 mainly depends on the radial clamping component force generated by the conical surface 121d-3 of the valve seat 121 pressing tightly. The seal of the conical portion 1221 belongs to hard seal. The seal seat 122 is made of hard material, such as stainless steel. At this time, the conical setting is beneficial for the conical portion 1221 to deform and achieve hard seal. It can be seen that other pushing portions other than the conical surface 121d-3 can also be provided on the inner wall of the valve seat 121. For example, the pushing portion can be an annular boss. If the conical portion 1221 is conical, when the conical portion 1221 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 conical portion 1221, the pushing portion will generate a radial component force on the conical portion 1221 to force the conical portion 1221 to deform and clamp the connecting pipe 300. At the same time, hard seals are formed between the conical portion 1221, the valve seat 121, and the connecting pipe 300.

[0062] Combined with the above analysis, it can be seen that the embodiment of the present application has the following technical effects:

[0063] Through the sliding setting between the valve seat 121 and the connecting nut 111, the compression amount of the seal 123 for contacting and sealing the connecting pipe 300 can be adjusted. When the connecting pipe 300 is installed first, the valve seat 121 can be in contact with the connecting nut 111 axially, and the compression amount of the seal 123 can be relatively small, which is convenient for the installation of the connecting pipe 300. After the connecting pipe 300 is installed, by adjusting the thread engagement dimension between the connecting pipe 200 and the connecting nut 111, the relative displacement between the valve seat 121 and the connecting cap 112 can be driven, and the seal 123 can be pushed to increase the compression amount of the seal 123, thereby improving the sealing performance between the connecting pipe 300 and the valve seat 121 to ensure the connection reliability between the joint assembly 100 and the connecting pipe 300.

[0064] That is to say, the joint assembly 100 provided by the embodiments of the present application can take into account the convenience of installation and the reliability of connection. Moreover, the setting of the conical portion 1221 can add a hard seal, which is combined with the soft seal of the seal 123 to improve the sealing performance with the connecting pipe 300.

[0065] In addition, the valve seat 121 and the joint head 210 are directly abutted and sealed. There are few sealing points and the sealing performance is good, which can reduce the leakage risk. Further, it can be the butt joint line seal as described above, and the sealing is more reliable.

[0066] In this embodiment, the conical portion 1221 is a part of the seal seat 122, that is, the conical portion 1221 and the main body portion 1222 are of an integral structure. At this time, when the cover portion 1122 pushes against the seal 123 and then pushes against the seal seat 122, the conical portion 1221 can be directly driven to move, and the synchronism is good.

[0067] As Figure 8 shown, the abutting portion 124 in this embodiment includes a large-diameter portion 1241 and a small-diameter portion 1242 distributed along the axial direction. The small-diameter portion 1242 is close to the cover portion 1122, and the large-diameter portion 1241 is close to the seal 123. The abutting portion 124 has a fourth hole portion 124a penetrating along the axial direction, and the connecting pipe 300 can pass through the fourth hole portion 124a. The outer diameter of the large-diameter portion 1241 is approximately equal to the inner diameter of the second hole portion 121d of the valve seat 121, and it is slidably matched with the valve seat 121, that is, at least a part of the large-diameter portion 1241 is located in the second hole portion 121d. A part of the abutting portion 124 is located in the second hole portion 121d. On the one hand, it is in guiding cooperation with the valve seat 121 to ensure the axial movement of the abutting portion 124. On the other hand, the abutting portion 124 completely abuts against the end face of the seal 123 in the axial direction, which can ensure that the seal 123 expands radially and plays a sealing function. Here, the large-diameter portion 1241 is provided to abut against the seal 123, and the small-diameter portion 1242 cooperates with the cover portion 1122, which is beneficial to the concentrated transmission of the thrust of the cover portion 1122. The part of the large-diameter portion 1241 located outside the valve seat 1241 along the axial direction can gradually slide into the valve seat 121 during the pushing process.

[0068] In this embodiment, the inner diameter of the small-diameter portion 1242 of the abutting portion 124 can also be set to be larger than the inner diameter of the large-diameter portion 1241, that is, the inner hole of the abutting portion 124 is not an equal-diameter hole but a stepped hole. When the connecting pipe 300 is inserted into the second connecting assembly 120, it first inserts into the small-diameter portion 1242 of the abutting portion 124. The inner hole of the small-diameter portion 1242 is set to be larger to facilitate the introduction of the connecting pipe 300 into the second connecting assembly 120.

[0069] Please continue to refer to Figure 9, the seal 123 in this embodiment includes a fifth hole portion 123a penetrating axially, and the connecting pipe 300 can pass through the fifth hole portion 123a. On both the outer and inner sides of the seal 123, there are at least two protrusions distributed axially, namely the inner protrusion 1232 and the outer protrusion 1231. In this way, when the seal 123 is axially pressed, the outer protrusion 1231 can press against the valve seat 121, and the inner protrusion 1232 can abut against the connecting pipe 300, thereby forming at least two seals to increase the sealing reliability.

[0070] Furthermore, the seal 123 in this embodiment may include a rubber body, and a metal skeleton (not shown in the figure) is provided inside the rubber body. The axial dimension of the metal skeleton is smaller than the axial dimension of the rubber body, and the radial dimension of the metal skeleton is smaller than the radial dimension of the rubber body. Both the axial dimension and the radial dimension of the metal skeleton are set to be smaller than the dimensions of the rubber body, which allows the seal 123 to achieve the required compression deformation amount when being pressed, ensuring the sealing effect. On this premise, the provided metal skeleton can improve the strength of the seal 123, avoid excessive deformation and damage during the extrusion process, and can better transmit the axial thrust to the seal seat 122, facilitating the deformation of the conical portion 1221 of the seal seat 122.

[0071] Please continue to refer to 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. The first abutting portion and the second abutting portion can abut axially. Specifically, the valve seat 121 may include a thin neck portion 121a and a thick neck portion 121b. The axial projection area of the thin neck portion 121a may 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 may have a third axial end surface 112 ( Figure 2 the right end surface in), and the third axial end surface 112 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 axially abut against the third axial end surface 112 to achieve the axial abutment between the valve seat 121 and the connecting nut 111.

[0072] It should be understood that the abutting 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 usage requirements. Exemplarily, the second abutting 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 6If it is the left end face in [description], then the first axial end face 121e can be the first abutting portion, and the valve seat 121 can be axially abutted against the limiting structure in the first hole portion 1111 through the first axial end face 121e, and this is also feasible.

[0073] Here, the valve seat 121 and the connecting nut 111 are arranged to be axially abutted, 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. As can be seen from the subsequent description of the assembly process, when the joint portion 210 and the first hole section 1111a are tightened in thread, there will be a distance between the first abutting portion and the second abutting portion in the axial direction, that is, they will no longer abut. Therefore, actually, if the valve seat 121 and the connecting nut 111 are not axially abutted, the insertion of the connecting pipe 300 can also be realized. At this time, by extension, because the connecting nut 111 and the valve seat 121 are axially abutted, and the connecting nut 111 and the connecting cap 112 are separately arranged to install the valve seat 121. If it is not limited to axial abutment, the connecting nut 111 and the connecting cap 112 can also be integrally arranged. For example, the cylindrical portions 1121 of the connecting nut 111 and the connecting cap 112 are arranged to have approximately the same diameter. Similarly, in the above-mentioned embodiment, the limiting portion 121d-1 is provided to limit the connecting pipe 300 to clarify the insertion in place of the connecting pipe 300. But actually, such a limit can also be not carried out. As long as the connecting pipe 300 can pass through the conical portion 1221, it can be clamped by the conical portion 1221 in the subsequent assembly process. But as mentioned above, setting the limiting portion 121d-1 and axially abutting the connecting nut 111 and the valve seat 121 are all to make the assembly easier to carry out.

[0074] As Figure 1 shown, the cylindrical portion 1121 and the connecting nut 111 can be fixed by welding. In this way, the connection reliability between the connecting cap 112 and the connecting nut 111 can be relatively high, and it has a relatively high sealing performance. At the same time, since there is no need to provide a thread on the cylindrical portion 1121, the thickness of the cylindrical portion 1121 can be relatively small, which is also beneficial to reducing the weight, structural size and cost of the joint assembly 100 provided in the present application.

[0075] Specifically, still as Figure 4 shown, the outer wall surface of the connecting nut 111 can have a fourth axial end face 1112, the fourth axial end face 1112 and the third axial end face 112 can be arranged to be axially offset, and the cylindrical portion 1121 can be abutted against the fourth axial end face 1112, and then can be welded to the fourth axial end face 1112.

[0076] It should be understood that, in addition to the welding solution, other connection methods can also be adopted between the cylindrical portion 1121 and the connecting nut 111, such as threaded connection, snap connection, screw connection, riveting, etc. As long as the connection is along the axial direction and can drive the lower edge of the connecting cap 112 to move axially relative to the valve seat 121 synchronously.

[0077] The present application also provides a valve device, including a valve component 200, a connecting pipe 300, and the above-mentioned joint assembly 100. The valve component 200 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 300 is inserted into the second connecting assembly 120 and abuts against the limiting portion 121d-1 to realize the connection between the connecting pipe 300 and the valve component 200.

[0078] Please refer to Figure 14 , Figure 14 which is a schematic flow chart of the assembling method of the valve device provided by the embodiment of the present application.

[0079] The present application also provides an assembling method of a valve device, which is applicable to the above-mentioned valve device. As Figure 14 shown, the assembling method includes the following steps S1 to S3.

[0080] Step S1, configure the valve component 200, the joint assembly 100, and the connecting pipe 300.

[0081] Step S2, insert 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 axially abutted to indicate that the connecting pipe 300 is inserted in place.

[0082] Step S3, screw the connecting nut 111 onto the joint portion 210 so that the joint portion 210 directly abuts against the valve seat 121 of the second connecting assembly 120 to achieve a hard seal fit, and continuously increase the thread fit dimension between the joint portion 210 and the connecting nut 111, so that the cover plate portion 1122 displaces towards the second connecting assembly 120. The cover plate portion 1122 pushes against the abutting portion 124 to compress the sealing member 123 so that it is deformed to play a sealing role. At the same time, the sealing member 123 transmits the pushing force to the sealing seat 122 to push the conical portion 1221 to move axially. During the axial movement of the conical portion 122, it contacts and then abuts tightly against the conical surface 121d-3 of the top pushing portion of the valve seat 121. The conical portion 1221 is deformed to clamp the connecting pipe 300. At this time, the joint portion 210 and the first hole section 1111a are in a state where the threading is completed.

[0083] In this article, specific examples are used to illustrate the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A joint assembly for connecting a joint head (210) and a connecting pipe (300), characterized in that, The joint assembly includes: A first connection component (110), which includes a connected connection nut (111) and a connection cap (112). The connection nut (111) is provided with a first hole portion (1111), and the first hole portion (1111) includes a first hole section (1111a). The first hole section (1111a) is provided with internal threads for threaded connection with the joint head (210). The connection cap (112) includes a cover plate portion (1122). A second connection component (120), which includes a valve seat (121), a sealing seat (122), a abutting portion (124), and a sealing member (123). The valve seat (121) is provided with a second hole portion (121d), the sealing seat (122) is located in the second hole portion (121d), and a part of the abutting portion is located in the second hole portion (121d). The sealing member is provided between the sealing seat (122) and the abutting portion. When the joint head (210) is tightened with the first hole section (1111a), the cover plate portion (1122) axially abuts against the abutting portion to push the sealing member and the sealing seat (122). The valve seat (121) is provided with a pushing portion. One end of the sealing seat (122) close to the joint head (210) is a conical portion (1221). The pushing portion abuts against the conical portion (1221). The conical portion (1221) can be deformed to achieve hard sealing cooperation with the connecting pipe (300), and the conical portion (1221) has hard sealing cooperation with the pushing portion.

2. The joint assembly according to claim 1, characterized in that, The abutting portion (124) includes a large-diameter portion (1241) and a small-diameter portion (1242) distributed axially. The small-diameter portion (1242) is close to the cover plate portion (1122), and the large-diameter portion (1242) is close to the sealing member (123).

3. The joint assembly according to claim 2, characterized in that, The inner diameter of the small-diameter portion (1242) is larger than the inner diameter of the large-diameter portion (1241).

4. The joint assembly according to claim 1, wherein, On both the outer side and the inner side of the sealing member (123), there are at least two protrusions distributed axially.

5. The joint assembly according to claim 4, characterized in that, The sealing member (123) includes a rubber main body, and a metal skeleton is arranged inside the rubber main body. The axial dimension of the metal skeleton is smaller than the axial dimension of the rubber main body, and the radial dimension of the metal skeleton is smaller than the radial dimension of the rubber main body.

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

7. The joint assembly according to claim 6, wherein A second step surface (121d-2) is formed in the second hole portion (121d), and the second step surface (121d-2) is in contact with the conical surface (121d-3); the seal seat (122) includes a main body portion (1222), the conical portion (1221) and the main body portion (1222) are distributed along the axial direction, and the seal member (123) is disposed between the main body portion (1221) and the abutting portion (123); the main body portion (1222) has an annular end surface (1222a) in contact with the conical portion (1221). When the joint head (210) and the first hole section (1111a) are in a screwed-up state, the seal seat (122) presses the annular end surface (1222a) against the second step surface (121d-2).

8. The joint assembly according to any one of claims 1-7, characterized in that, When the joint head (210) and the first hole section (1111a) are in a screwed-up state, the valve seat (121) and the joint head (210) are directly abutted to achieve a hard seal fit.

9. A valve device, characterized in that, It includes a valve component, the valve component includes a joint head (210), a connecting pipe (300) and a joint assembly (100), the joint assembly (100) is the joint assembly according to any one of claims 1-8, the connecting nut (111) is threadedly connected to the joint head (210), and the connecting pipe (300) is inserted into the second connecting assembly (120).

10. A method for assembling a valve device, characterized in that, Applicable to the valve device according to claim 9, the assembling method includes the following steps: Configure the valve component (200), the joint assembly (100) and the connecting pipe (300); Insert the connecting pipe (300) into the joint assembly (120); Screw the connecting nut (111) onto the joint head (210) so that the joint head (210) and the valve seat (121) of the second connecting assembly (120) are in hard seal fit, and continuously increase the threaded fit dimension between the joint head (210) and the connecting nut (111) so that the cover plate portion (1122) is displaced towards the second connecting assembly (120), the cover plate portion (1122) pushes the abutting portion to push the seal member and the seal seat until the conical portion (1221) is tightly abutted against the pushing portion, and the conical portion (1221) is deformed to clamp the connecting pipe (300).

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