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 and the sealing piece are all annular; the sealing seat is of an integrated structure and located in the valve seat. Sealing pieces are arranged between the sealing seat and the valve seat as well as between the sealing seat and the connecting pipe; when the connector part and the first hole section are tightened in a threaded mode, the cover plate part abuts against the sealing piece between the sealing base and the connecting pipe in the axial direction, the cover plate part abuts against 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 of the sealing base 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 sealing connection, and particularly relates to a joint assembly, a valve device, and an assembling 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 in 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 to be urgently solved 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 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 component, including a connecting nut and a connecting cap connected to each other. 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 threadedly connecting with the joint head; the connecting cap includes a cover plate portion;

[0007] A second connection component, including a valve seat, a seal seat, and a seal; the valve seat is provided with a second hole portion, and the seal seat is an integral structure and at least partially located in the second hole portion; seals are provided both between the seal seat and the valve seat and between the seal seat and the connecting pipe;

[0008] When the joint head is tightened with the first hole section, the cover plate portion axially abuts against the seal seat and pushes the seal between the seal seat and the connecting pipe. The valve seat is provided with a pushing portion, and one end of the seal seat close to the joint head is a conical portion. The pushing portion abuts against the conical portion, and the conical portion can be deformed to achieve hard sealing cooperation with the connecting pipe, and the conical portion and the pushing portion are in hard sealing cooperation.

[0009] The present application further 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 component.

[0010] The present application also provides an assembly method for a valve device, which is applicable to the above-mentioned valve device. The assembly 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 sealing 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 seal between the seal seat and the connecting pipe;

[0014] Continue to increase the thread fit dimension between the joint head and the connecting nut, the cover plate portion pushes against the seal seat, so that the conical portion abuts tightly against the pushing portion, and the conical portion deforms to clamp the connecting pipe.

[0015] In the application solution, when the threading is completed, the cover plate portion presses tightly against the seal between the connecting pipe and the seal seat. Then, after the connecting pipe is inserted into the second connecting component and before the threading is tightened, the compression amount of the seal between the connecting pipe and the seal seat is small, which facilitates 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 seal between the seal seat and the connecting pipe 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 take into account the convenience of installation and the reliability of connection. Moreover, the setting of the conical portion of the seal seat can add a hard seal, which is combined with the soft seal of the seal 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

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

[0017] Figure 2 is Figure 1 an enlarged view of part A in

[0018] Figure 3 is Figure 2 a schematic structural diagram of the connecting nut in

[0019] Figure 4 is Figure 3 a half-sectional view of the connecting nut along the axial direction in

[0020] Figure 5 is Figure 2 a schematic structural view of the valve seat of the second connection component in

[0021] Figure 6 is Figure 5 an axial sectional view of the valve seat in

[0022] Figure 7 is Figure 2 a schematic structural view of the seal seat of the second connection component in

[0023] Figure 8 is Figure 7 an enlarged view of part B in

[0024] Figure 9 is Figure 2 a schematic structural view of the connection cap in

[0025] Figure 10 is Figure 9 an axial sectional view of the connection cap in

[0026] Figure 11 is Figure 2 a schematic structural view when the valve device is assembled in

[0027] Figure 12 is a schematic flow chart of the assembling method of the valve device provided by the embodiment of the present application.

[0028] Figures 1 - 12 The descriptions of the reference numerals in

[0029] 100 - joint assembly;

[0030] 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;

[0031] 120 - second connection component, 121 - valve seat, 121a - thin neck part, 121b - thick neck part, 121c - first step surface, 121d - second hole part, 121d - 1 - limiting part, 121d - 2 - second step surface, 121d - 3 - second conical surface, 121e - first axial end face, 121f - first edge, 121g - second edge, 1222a - annular end face, 123a - first seal, 123b - second seal, 122 - seal seat, 122a - third hole part, 122a - 1 - second annular groove, 1221 - conical part, 122b - first annular groove, 1222 - main body part, 1223 - first conical surface; 124 - gasket;

[0032] 200 - valve component, 210 - joint part;

[0033] 300 - connecting pipe. Detailed implementation mode

[0034] In order 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 in conjunction with the drawings and specific implementation modes.

[0035] 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.

[0036] This embodiment provides a joint assembly 100 for realizing the connection between the joint part 210 and the 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. Exemplarily, in Figure 1 , the joint 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 joint part 210 can be the joint of the valve component 200, more specifically, the joint 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 joint part 210 can also be the joint of other structures, such as the joint of another connecting pipe. Then, the above joint assembly 100 can also be applied to the connection of two connecting pipes, etc.

[0037] Please continue to refer to Figure 2 , Figure 2 which is Figure 1 an enlarged view of part A in

[0038] The above joint assembly 100 includes a first connection assembly 110 and a second connection assembly 120. The first connection assembly 110 includes a connection nut 111 and a connection cap 112. As can be seen from Figure 2 , in the first connection assembly 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 part 210, the second connection assembly 120 is used to connect with the connecting pipe 300, the connection cap 112 is connected with the connection nut 111, and can act on the second connection assembly 120. Each part will be described in detail below.

[0039] As shown in Figure 3 , 4 , Figure 3 is Figure 2 a schematic structural diagram of the connection nut 111 in Figure 4 is Figure 3 a half-sectional view of the connection nut 111 along the axial direction in

[0040] In this embodiment, the connecting nut 111 is provided with a first hole portion 1111. The first hole portion 1111 penetrates the connecting 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 separating structure in the form of an annular protrusion, a stepped surface, etc. can also 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 portion 210. Specifically, as Figure 1 , Figure 2 shown, the valve component 200 can be provided with a joint portion 210. The joint portion 210 is provided with external threads for threaded connection with the internal threads of the first hole section 1111a.

[0041] The second connecting component 120 in this embodiment includes multiple components, specifically including a valve seat 121, a sealing seat 122, and a sealing member 123. These components are all annular structures.

[0042] Please see Figure 5 , 6 , Figure 5 which is Figure 2 a schematic structural view of the valve seat 121 of the second connecting component 120 in Figure 6 ; and Figure 5 is an axial sectional view of the valve seat 121 in

[0043] Combined with Figure 2 for understanding, 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. Of course, it is not limited to being a smooth hole section 1111b, as long as it does not affect the relative sliding of the valve seat 121 and the connecting nut 111 along the axial direction. The valve seat 121 can axially abut and seal with the joint portion 210 to achieve the seal between the joint assembly 100 and the joint portion 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.

[0044] Exemplarily, as Figure 2 , 5As shown, the valve seat 121 has a first axial end face 121e facing the joint part 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 part 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 against the second axial end face 210a. In this way, the axial abutting seal between the valve seat 121 and the joint part 210 can be realized. 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. The first edge 121f and the second edge 121g here can be linear edges or arc-shaped edges formed by chamfers.

[0045] As can be seen, the first axial end face 121e of the valve seat 121 may not be provided with a stepped portion. In this embodiment, the valve seat 121 is provided with a second hole portion 121d that penetrates axially through the valve seat 121. Then, the inner edge of the first axial end face 121e itself can form an edge, which can abut against the conical surface 210a for sealing, that is, form a line seal. It can be understood that when the joint part 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, a surface sealing method can also be adopted between the valve seat 121 and the joint part 210 for sealing.

[0046] Looking again Figure 6 , the valve seat 121 in this embodiment is provided with a second hole portion 121d. 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 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, which is convenient for the operator to determine that the connecting pipe 300 is installed in place.

[0047] The structural form of the limiting portion 121d-1 is not limited here, as long as it can meet the usage requirements. Exemplarily, such as Figure 6As 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-through hole. For example, the limiting portion 121d-1 is a partition plate.

[0048] Reference can continue to Figure 7 、 8 , Figure 7 is Figure 2 a schematic structural view of the seal seat 122 of the second connection assembly 120 in Figure 8 is Figure 7 an enlarged view of part B in

[0049] The seal seat 122 is an integral structure, and at least part of it is located in the second hole portion 121d of the valve seat 121. The seal seat 122 is used to clamp the connecting pipe 300 to realize the connection between the joint assembly 100 and the connecting pipe 300. In this embodiment, the seal seat 122 includes a conical portion 1221. Specifically, one end of the seal seat 122 close to the joint portion 210 is the conical portion 1221. The seal seat 122 also includes a main body portion 1222. The main body portion 1222 and the conical portion 1221 are axially distributed, and the outer diameter of the main body portion 1222 is greater than the maximum outer diameter of the conical portion 1221.

[0050] The seal 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 2 it is understood that the seal seat 122 is slidably matched with the valve seat 121. Specifically, the outer side of the main body portion 1222 is slidably matched 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 seal seat 122 has an inner side and an outer side distributed radially. The inner side is the side close to the axial center line of the seal seat 122, and the outer side is the side far from the axial center line. A first annular groove 122b is provided on the outer side of the seal seat 122, and a second annular groove 122a-1 is provided on the inner side of the seal seat 122. Both the first annular groove 122b and the second annular groove 122a-1 are used to accommodate the sealing member. A part of the sealing member is located in the corresponding annular groove. The sealing member is, for example, a sealing ring structure. As Figure 2 shown, the sealing member located in the first annular groove 122b is the first sealing member 123a, and the first sealing member 123a is used to seal the valve seat 121 and the seal seat 122. The sealing member 123 located in the second annular groove 122a-1 is the second sealing member 123b, and the second sealing member 123b is used to seal the connecting pipe 300 and the seal seat 122.

[0051] Specifically, the first annular groove 122b is a concave groove, and the second annular groove 122a-1 of the sealing seat 122 is as follows Figure 7 As shown, the third hole portion 122a of the sealing seat 122 is a stepped hole, including a large hole and a small hole distributed axially. Among them, the large hole forms the second annular groove 122a-1. In this way, the side of the second annular groove 122a-1 away from the conical portion 1221 is open, and a gasket 124 can be arranged at the open position.

[0052] Please continue to refer to Figure 9 、 10 , Figure 9 is Figure 2 a schematic structural diagram of the connection cap 112 in Figure 10 is Figure 9 an axial sectional view of the connection cap 112 in

[0053] The connection 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 connection nut 111. The cover plate portion 1122 is covered at one end of the cylindrical portion 1121 axially, specifically, at 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 fixation. 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 sealing seat 122 and abut against the limiting portion 121d-1.

[0054] As Figure 2 shown, the cover plate portion 1122 of the connection cap 112 and the seal 123 located in the second annular groove 122a-1 are in axial contact. Since the side of the second annular groove 122a-1 facing the cover plate portion 1122 is open, a gasket 124 can be arranged on the side of the second seal 123b facing the cover plate portion 1122, which is beneficial to transmitting the abutting thrust to the second seal 123b. The cover plate portion 1122 directly contacts the gasket 124 to axially limit the second connection assembly 120, so that the second connection assembly 120 can be encapsulated between the connection nut 111 and the connection cap 112. Of course, the cover plate portion 1122 can also directly abut against the second seal 123b.

[0055] Combined with Figure 1 、 2 Understand that when the valve seat 121 and the connection nut 111 abut axially, there is a first sliding gap between the sealing seat 122 and the cover plate portion 1122. At this time, the first sliding gap is X1. There is a second sliding gap between the valve seat 121 and the cover plate portion 1122. At this time, the second sliding gap is X2, and X2 is greater than X1.

[0056] At the beginning of the specific assembly, the connecting pipe 300 can be inserted into the second connecting component 120 first. Due to the existence of the first sliding gap X1, there is no axial compression force on the second seal 123b, so the compression amount of the second seal 123b is relatively small, and the insertion and assembly of the connecting pipe 300 are relatively easy. After the connecting pipe 300 abuts against the limiting portion 121d-1 and is installed, the joint head 210 can be installed, and the joint head 210 of the valve component 200 and the connecting nut 111 are threadedly connected. By adjusting the threaded fit dimension between the joint head 210 and the connecting nut 111, the joint head 210 and the valve seat 121 can be axially abutted to achieve contact sealing between the joint head 210 and the valve seat 121. Then, continuously increase the threaded fit dimension between the joint head 210 and the connecting nut 111. Since the joint head 210 and the valve seat 121 have been abutted, the axial position of the valve seat 121 remains unchanged. 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 sealing seat 122 for displacement to reduce the first sliding gap. When the displacement amount is X1, the first sliding gap is eliminated, and the compression amount of the second seal 123 reaches the maximum, so as to improve the sealing performance between the second connecting component 120 and the connecting pipe 300.

[0057] Please refer to Figure 11 for understanding. Figure 11 Figure Figure 2 is a schematic structural diagram when the valve device in

[0058] As Figure 11 shown, when continuously tightening the connecting nut 111 and the joint head 210, the cover plate portion 1122 of the connecting cap 112 continuously approaches the valve seat 121, pushing the gasket 124 to compress the second seal 123b. After moving a distance X1, the cover plate portion 1122 will contact the sealing seat 122 and start to axially push the sealing seat 122. It can be seen that it is okay for the cover plate portion 1122 to directly or indirectly push the sealing seat 122. The cover plate portion 1122 pushing the sealing seat 122 can further reduce the second sliding gap. When the cover plate portion 1122 starts to push the sealing seat 122, the second sliding gap has been reduced from X2 to X2-X1. The conical portion 1221 of the sealing 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 second conical surface 121d-3. During the axial movement of the conical portion 1221, the conical portion 1221 will be deformed under the pressure of the second conical surface 121d-3 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 sealing seat 122 clamps the connecting pipe 300, a hard seal will be formed, that is, the conical portion 1221 can form a hard seal, combined with the soft seals of the first seal 123a and the second seal 123b, to improve the sealing performance of the second connecting assembly 120 and the connecting pipe 300.

[0060] As Figure 2 , 7 shown, the outer diameter of the main body portion 1222 is greater than the outer diameter of the conical portion 1221, and 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, and the second step surface 121d-2 is connected to the second 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 third sliding gap between them. The third sliding gap is X3 at the initial assembly position, and X3 can be equal to X2 - X1, that is, when the cover portion 1122 moves to abut against the axial end face of the valve seat 121, X2 is eliminated. As Figure 2 shown, at this time, X3 can also be eliminated synchronously, that is, when the deformation amount of the conical portion 1221 is the largest, the annular end face 1222a also abuts against the second step surface 121d-2. Of course, X3 can also be less than X2 - X1, that is, when the annular end face 1222a abuts against the second step surface 121d-2, the cover portion 1122 does not need to abut against the valve seat 121. As long as the deformation amount of the conical portion 1221 is sufficient to clamp the connecting pipe 300 when the annular end face 1222a abuts against the second step surface 121d-2, it is only that the cover portion 1122 abuts against the valve seat 121 at the same time, and the structural stability is more reliable.

[0061] Here, the deformation of the conical portion 1221 of the sealing seat 122 to clamp the connecting pipe 300 mainly relies on the second conical surface 121d-3 of the valve seat 121 to abut tightly to generate a radial clamping component force. The seal of the conical portion 1221 belongs to a hard seal, and the sealing seat 122 is made of a hard material, such as stainless steel. At this time, the conical shape is beneficial for the conical portion 1221 to deform and achieve a hard seal. It can be seen that other pushing portions other than the second 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 and the valve seat 121 and the connecting pipe 300.

[0062] Let's look at Figure 8, in this embodiment, the sealing seat 122 has a third hole portion 122a penetrating axially. The hole wall of the third hole portion 122a includes a section of first tapered surface 1223. The first tapered surface 1223 is located inside the main body portion 1222 and at the position where it is connected to the tapered portion 1221, that is, the tapered portion 1221 corresponds to the hole wall of the third hole portion 122a. The radial dimension of the first tapered surface 1223 gradually increases in the direction closer to the tapered portion 1221. In this way, after the connecting pipe 300 is inserted into the first connecting component 120, there is a radial gap between the tapered portion 1221 and the connecting pipe 300. Thus, when the pushing portion of the valve seat 121 presses against the tapered portion 1221, the end of the tapered portion 1221 closer to the joint portion 210 is more likely to be squeezed and deformed, improving the effect of hard sealing.

[0063] Combined with the above analysis, the embodiments of the present application have the following technical effects:

[0064] Through the sliding arrangement between the valve seat 121 and the connecting nut 111, the compression amount of the second sealing member 123b for contact-sealing the connecting pipe 300 can be adjusted. When the connecting pipe 300 is installed first, the valve seat 121 can abut against the connecting nut 111 axially, and the compression amount of the second sealing member 123b 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 valve seat 121 and the connecting cap 112 can be driven to generate relative displacement, which can push against 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 to ensure the connection reliability of the joint assembly 100 and the connecting pipe 300.

[0065] 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 tapered portion 1221 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 300.

[0066] In addition, the valve seat 121 and the joint portion 210 are directly abutted and sealed, with fewer sealing points and better sealing performance, which can reduce the leakage risk. And further, it can be the butt joint line seal as described above, and the sealing is more reliable.

[0067] In this embodiment, the conical portion 1221 is a part of the sealing seat 122, that is, the conical portion 1221 and the main body 1222 are an integrated structure. At this time, when the cover plate portion 1122 pushes against the sealing seat 122, it can directly drive the conical portion 1221 to move, and the synchronization is good. Theoretically, the cover plate portion 1122 can push against the sealing seat 122 by directly pushing against the sealing member, and then push the conical portion 1221, but the conical portion 1221 is to achieve hard sealing, which requires a large thrust, and the sealing member is actually difficult to withstand such thrust. Therefore, after the second sealing member 123b is compressed into place, the thrust is transmitted by the sealing seat 122. At this time, due to the existence of the sealing seat 122, it is necessary to set sealing members on both sides to achieve the sealing of the valve seat 121 and the connecting pipe 300. In this embodiment, the first annular groove 1221 and the second annular groove 122a-1 are staggered in the axial direction. It is understandable that the two can also be arranged in a non-staggered manner, but in this case, the sealing seat 122 needs to be grooved on the inner and outer sides of the same axial position at the same time. In comparison, the staggered arrangement is easier to ensure the strength of the sealing seat 122.

[0068] 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.

[0069] 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 6 The 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.

[0070] 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 part 210 and the first hole section 1111a are tightened in thread, there will be a distance between the first abutting part and the second abutting part in the axial direction, that is, they will no longer abut. Therefore, in fact, 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 extended understanding, 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 parts 1121 of the connecting nut 111 and the connecting cap 112 are arranged with approximately equal diameters. Similarly, in the above-mentioned embodiment, the limiting part 121d-1 is mentioned to limit the connecting pipe 300 to clarify the insertion in place of the connecting pipe 300, but in fact, such a limit can also be not carried out, as long as the connecting pipe 300 can pass through the conical part 1221 and can be clamped by the conical part 1221 in the subsequent assembly process. However, as mentioned above, setting the limiting part 121d-1 and axially abutting the connecting nut 111 and the valve seat 121 are both convenient for the assembly to be carried out more easily.

[0071] As Figure 1 shown, the cylindrical part 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 has high sealing performance. At the same time, since there is no need to set a thread on the cylindrical part 1121, the thickness of the cylindrical part 1121 can be relatively small, which is also beneficial to reducing the weight, structural size and cost of the joint assembly 100 provided by the present invention.

[0072] 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 in an axial dislocation, and the cylindrical part 1121 can abut against the fourth axial end face 1112, and then can be welded to the fourth axial end face 1112.

[0073] It should be understood that in addition to the welding scheme, other connection methods can also be adopted between the cylindrical part 1121 and the connecting nut 111, such as threaded connection, clamping connection, screw connection, riveting connection, etc., as long as they are axially connected and can drive the lower edge of the connecting cap 112 to move axially relative to the valve seat 121 synchronously.

[0074] The present application also provides a valve device, which includes 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.

[0075] Please refer to Figure 12 , Figure 12 which is a schematic flow chart of the assembling method of the valve device provided by the embodiment of the present application.

[0076] The present application also provides an assembling method of a valve device, which is applicable to the above-mentioned valve device. As Figure 12 shown, the assembling method includes the following steps S1 to S3.

[0077] Step S1, configure the valve component 200, the joint assembly 100, and the connecting pipe 300.

[0078] 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.

[0079] 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 portion 1122 displaces towards the second connecting assembly 120, and the cover portion 1122 pushes against the seal, specifically against the second seal 123b. After the cover portion 1122 displaces a certain distance, continue to tighten the joint portion 210, then the cover portion 1122 continues to push against the seal seat 122, and the conical portion 1221 moves axially and contacts and then presses tightly against the second conical surface 121d-3 of the top pushing portion of the valve seat 121. The conical portion 1221 deforms and clamps 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.

[0080] That is, in step S3, the joint portion 210 and the connecting nut 111 are tightened. During this process, there are three nodes. The first node is that the valve seat 121 of the connecting assembly 120 directly abuts. The second node is that the cover portion 1122 pushes the second seal 123b in place and contacts the seal seat 122. The third node is that the cover portion 1122 pushes the seal seat 122, and the conical portion 1221 at one end of the seal seat 122 abuts against the top pushing portion (specifically the second conical surface 121d-3) and deforms to clamp the connecting pipe 300.

[0081] In this text, specific examples are used to elaborate on the principles and implementation manners of this application. The descriptions of the above embodiments are only used to help understand the method and its core idea of this application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principles of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A joint assembly for realizing the connection between a joint head (210) and a connecting pipe (300), characterized in that, The joint assembly includes: A first connection component (110), including 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), including a valve seat (121), a seal seat (122), and a seal member (123). The valve seat (121) is provided with a second hole portion (121d), and the seal seat (122) is an integral structure and at least partially located within the second hole portion (121d). The seal member (123) is provided between the seal seat (122) and the valve seat (121) and between the seal seat (122) and the connecting pipe (300); When the joint head (210) is tightened with the first hole section (1111a), the cover plate portion (1122) axially abuts against the seal seat (122), and pushes the seal member (123) between the seal seat (122) and the connecting pipe (300). The valve seat (121) is provided with a pushing portion. One end of the seal 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 seal seat (122) has a third hole portion (122a) axially penetrating. The hole wall of the third hole portion (122a) includes a first conical surface (1223). The first conical surface (1223) connects the hole wall of the third hole portion (122a) corresponding to the conical portion (1221). The radial dimension of the first conical surface (1223) gradually increases in the direction close to the conical portion (1221).

3. The joint assembly according to claim 1, characterized in that The seal seat (122) includes an inner side and an outer side distributed radially. A first annular groove (1221) is provided on the outer side of the seal seat (122), and a second annular groove (122a-1) is provided on the inner side of the seal seat (122). The first annular groove (1221) and the second annular groove (122a-1) are respectively used to accommodate corresponding parts of the seal member. The first annular groove (1221) and the second annular groove (122a-1) are axially staggered. The second annular groove (122a-1) is close to the cover plate portion (1122), and one side of the second annular groove (122a-1) facing the cover plate portion (1122) is open.

4. The joint assembly according to claim 3, wherein, The second connection component (110) further includes a gasket (124). The gasket (124) is provided between the seal member between the seal seat (122) and the connecting pipe (300) and the cover plate portion (1122).

5. The joint assembly according to claim 1, wherein, A limiting portion (121d-1) is formed in the second hole portion (121d), and the connecting pipe (300) is inserted into the second hole portion (121d) and can axially abut against the limiting portion (121d-1).

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

7. The joint assembly according to claim 6, characterized in that, A second stepped surface (121d-2) is formed in the second hole portion (121d), and the second stepped surface (121d-2) is connected to the second conical surface (121d-3); the sealing seat (122) includes a main body portion (1222), the conical portion (1221) and the main body portion (1222) are axially distributed, and the sealing member is arranged between the main body portion (1221) and the valve seat (121) and between the main body portion (1222) and the connecting pipe (300); the main body portion (1222) has an annular end surface (1222a) connected to the conical portion (1221), and when the joint head (210) and the first hole section (1111a) are in a screwed and tightened state, the sealing seat (122) presses the annular end surface (1222a) against the second stepped 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 and tightened state, the valve seat (121) and the joint head (210) directly abut against each other to achieve a hard seal fit.

9. The joint assembly according to claim 8, characterized in that, The valve seat (121) has a first axial end surface (121e) facing away from the cover plate portion (1122), the first axial end surface (121e) is provided with a stepped portion, the edge of the stepped surface of the stepped portion forms an annular first edge (121f), the edge of the stepped side wall of the stepped portion forms an annular second edge (121g), the joint head (210) has a second axial end surface (210a) facing the valve seat (121), the second axial end surface (210a) is an annular conical surface, and the first edge (121f), the second edge (121g) and the second axial end surface (210a) abut against each other for sealing.

10. The joint assembly according to any one of claims 1-7, characterized in that, The connecting cap (112) includes a cylindrical portion (1121) and the cover plate portion (1122), and at least a part of the valve seat (121) in the axial direction is located in 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 provided.

11. 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 1-10, the connecting nut (111) and the joint head (210) are threadedly connected, and the connecting pipe (300) is inserted into the second connecting assembly (120).

12. A method for assembling a valve device, characterized in that, Applicable to the valve device according to claim 11, 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 thread fit dimension between the joint head (210) and the connecting nut (111) so that the cover plate portion (1122) displaces towards the second connecting assembly (120), and the cover plate portion (1122) pushes against the second seal (123b); Continue to increase the thread fit dimension between the joint head (210) and the connecting nut (111), the cover plate portion (1122) pushes against the seal seat (122), so that the conical portion (1221) is tightened against the pushing portion, and the conical portion (1221) deforms to clamp the connecting pipe (300).

Images