Joint assembly, valve device and assembling method of valve device

Abstract

The invention discloses a connector assembly, a valve device and an assembling method of the valve device, and the connector assembly comprises a first connecting assembly and a second connecting assembly, the first connecting assembly comprises a connecting nut and a connecting cap, the connecting nut is provided with a first hole part, the first hole part comprises a first hole section, and the first hole section is provided with an internal thread; the connecting cap comprises a cover plate part; the second connecting assembly comprises a valve seat, a sealing seat and a sealing piece; the valve seat is of an integrated structure and is provided with a second hole part, and at least part of the sealing seat is located in the second hole part; the valve seat is provided with a conical part facing the sealing seat, and the sealing seat is provided with a pushing part; when the connector part and the first hole section are tightened, the cover plate part abuts against the sealing piece in the axial direction, the sealing piece can be in soft sealing fit with the connecting pipe, the pushing part abuts against the outer wall face of the conical part, the conical part can deform to be in hard sealing fit with the connecting pipe, and the conical part and the pushing part also form hard sealing fit.

Description

Technical Field

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

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

[0003] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects is still a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a joint assembly, a valve device and an assembly method of the valve device, wherein there is both a hard seal and a soft seal between the joint assembly and the connecting pipe, which can improve the reliability of the seal while taking into account the convenience of installation.

[0005] In order to solve the above technical problems, the present invention provides a joint assembly for realizing the connection between a joint part and a connecting pipe, the joint assembly comprising:

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

[0007] The second connection assembly comprises a valve seat, a sealing seat and a sealing member; the valve seat is an integral structure and is provided with a second hole portion, at least a portion of the sealing seat is located in the second hole portion; the valve seat is provided with a conical portion arranged toward the sealing seat, and the sealing seat is provided with a push portion;

[0008] When the joint portion and the first hole section are tightened, the cover plate portion pushes the seal axially, and the seal can be deformed to form a soft seal with the connecting pipe. The push portion abuts against the outer wall surface of the conical portion, and the conical portion can be deformed to form a hard seal with the connecting pipe. The conical portion and the push portion also form a hard seal.

[0009] In the above solution, through the sliding arrangement between the valve seat and the connecting nut, the compression amount of the sealing member for contacting and sealing the connecting pipe can be adjusted. When installing the connecting pipe first, the valve seat can abut against the connecting nut axially, and the compression amount of the sealing member can be relatively small, which facilitates the installation of the connecting pipe; after the connecting pipe is installed, by adjusting the thread engagement size between the connecting pipe and the connecting nut, the valve seat and the connecting cap can be driven to generate relative displacement, and the sealing member can be pushed to increase the compression amount of the sealing member, 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.

[0010] That is to say, the joint assembly provided by the embodiment of the present invention can take into account the convenience of installation and the reliability of connection. Moreover, the setting of the conical portion of the valve seat can increase the hard seal fit, which is combined with the soft seal fit of the sealing member to improve the sealing performance with the connecting pipe.

[0011] The present invention also provides a valve device, including a valve component, the valve component includes a joint portion, a connecting pipe and a joint assembly, the joint assembly is the above-mentioned joint assembly, the connecting nut is threadedly connected to the joint portion, and the connecting pipe is inserted into the second connecting component.

[0012] The present invention also provides an assembly method for the valve device, which is applicable to the above-mentioned valve device. The assembly method includes the following steps: configuring the valve component, the joint assembly and the connecting pipe; inserting the connecting pipe into the joint assembly; screwing the connecting nut onto the joint portion so that the joint portion and the valve seat of the second connecting component are in hard seal fit, and continuously increasing the thread engagement size between the joint portion and the connecting nut so that the cover portion displaces towards the second connecting component, and the cover portion pushes the sealing member; continuing to increase the thread engagement size between the joint portion and the connecting nut, the cover portion pushes the sealing seat so that the pushing portion tightly abuts against the conical portion, and the conical portion deforms to clamp the connecting pipe. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the valve device provided by the present invention in an un-tightened state;

[0014] Figure 2 is Figure 1 a partial enlarged view of the connection part of the joint portion, the joint assembly and the connecting pipe in

[0015] Figure 3 a schematic structural diagram of the connecting nut;

[0016] Figure 4 is Figure 3 a half-sectional view of

[0017] Figure 5It is a schematic structural diagram of a valve seat;

[0018] Figure 6 is Figure 5 a sectional view of;

[0019] Figure 7 is a sectional view of a sealing seat;

[0020] Figure 8 is a sectional view of a connecting cap;

[0021] Figure 9 It is a schematic structural diagram of the valve device provided by the present invention in the tightened state;

[0022] Figure 10 It is a schematic flow diagram of the assembly method of the valve device provided by the present invention.

[0023] The description of the reference numerals is as follows:

[0024] 100 joint assembly;

[0025] 110 first connection assembly, 111 connection nut, 111a first hole part, 111a-1 first hole section, 111a-2 second hole section, 111b third axial end face, 111c fourth axial end face; 112 connection cap, 112a cylindrical part, 112b cover plate part;

[0026] 120 second connection assembly, 121 valve seat, 121a thin neck part, 121b thick neck part, 121c first step surface, 121d second hole part, 121d-1 first limiting part, 121d-2 second step surface, 121e first axial end face, 121f first edge, 121g second edge, 122 sealing seat, 122a third hole part, 122a-1 conical surface, 122b first annular groove, 122c second annular groove; 123 seal, 123a first seal, 123b second seal; 124 gasket; 125a conical part;

[0027] 200 valve component, 210 joint head, 211 second axial end face;

[0028] 300 connecting pipe. Specific embodiments

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of such features.

[0031] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, "connected" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0032] The directional terms mentioned in the embodiments of the present invention, such as "inner", "outer", etc., are only with reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer illustration and understanding of the embodiments of the present invention, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present invention.

[0033] In the description of the embodiments of the present invention, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0034] Please refer to Figures 1 - 9 , Figure 1 , which is a schematic structural view of the valve device provided by the present invention in an unfastened state. Figure 2 is Figure 1 a partial enlarged view of the connection part of the middle joint head, the joint assembly and the connecting pipe in Figure 3 , which is a schematic structural view of the connecting nut. Figure 4 is Figure 3 a half-sectional view of Figure 5 , which is a schematic structural view of the valve seat. Figure 6 is Figure 5 a sectional view of Figure 7 , which is a sectional view of the sealing seat. Figure 8 , which is a sectional view of the connecting cap. Figure 9 , which is a schematic structural view of the valve device provided by the present invention in a fastened state.

[0035] As shown in Figure 1As shown, an embodiment of the present invention provides a joint assembly 100 for connecting a joint portion 210 and a connecting pipe 300.

[0036] Here, the present invention 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 the embodiment of the present invention can be applied to the connection between the connecting pipe 300 and the valve component 200. In this application scenario, the joint portion 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 components such as an air conditioner outdoor unit or an indoor unit. For another example, the joint portion 210 can also be the joint of other structures, such as the joint of another connecting pipe. At this time, the above joint assembly 100 can also be applied to the connection of two connecting pipes, etc.

[0037] Combined with Figure 2 the above, the joint assembly 100 includes a first connection assembly 110 and a second connection assembly 120.

[0038] The first connection assembly 110 includes a connection nut 111 and a connection cap 112. It can be seen from Figure 2 that 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 portion 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 Figure 3 and Figure 4 shown, the connection nut 111 is provided with a first hole portion 111a. The first hole portion 111a axially penetrates the connection nut 111. The first hole portion 111a includes a first hole section 111a-1 and a second hole section 111a-2. The first hole section 111a-1 and the second hole section 111a-2 are axially distributed along the first hole portion 111a. Among them, the first hole section 111a-1 is a threaded hole and is provided with internal threads. The first hole section 111a-1 and the second hole section 111a-2 can be axially adjacent, 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 111a to separate the first hole section 111a-1 and the second hole section 111a-2. In this way, the axial dimensions of the first hole section 111a-1 and the second hole section 111a-2 can be conveniently controlled.

[0040] The first hole section 111a-1 is used to connect with the joint head 210. Specifically, the valve component 200 may be provided with a joint head 210, and the joint head 210 is provided with an external thread for mating with the internal thread of the first hole section 111a-1 for threaded connection.

[0041] The second connection assembly 120 in the embodiment of the present invention includes multiple components, which may specifically include a valve seat 121, a sealing seat 122, and a sealing member 123. These components are all annular structures.

[0042] As Figure 2 、 Figure 5 and Figure 6 shown, the valve seat 121 is in sliding fit with the second hole section 111a-2 of the connecting nut 111. The second hole section 111a-2 may be a smooth hole section, for example. Of course, it is not limited to the smooth hole section 111a-2, as long as it does not affect the relative axial sliding between the valve seat 121 and the connecting nut 111. The valve seat 121 can be axially abutted and sealed with the joint head 210 to achieve the seal 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.

[0043] Exemplarily, as Figure 2 and Figure 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 radially 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. The joint head 210 has a second axial end face 211 facing the valve seat 121. The second axial end face 211 is an annular conical surface. Both the first edge 121f and the second edge 121g of the valve seat 121 can be abutted on the second axial end face 211. In this way, a hard seal fit between the valve seat 121 and the joint head 210 along the axial direction can be achieved. 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. In short, there is a line contact between the first edge 121f, the second edge 121g and the second axial end face 211 to achieve the seal.

[0044] It can be known that the first axial end face 121e of the valve seat 121 may not be provided with a stepped portion. In the embodiment of the present invention, the valve seat 121 is provided with a second hole portion 121d that penetrates axially. Then, the inner edge of the first axial end face 121e itself can form an edge, which can be in abutting seal with the second axial end face 211, that is, a line seal is formed. It can be understood that when the joint portion 210 has an edge, the first axial end face 121e of the valve seat 121 including a conical surface can also achieve an abutting line seal. Of course, a surface seal manner can also be adopted between the valve seat 121 and the joint portion 210 for sealing.

[0045] Looking again Figure 6 , the valve seat 121 in this embodiment is an integral structure, which 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 first 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 first limiting portion 121d-1. In this way, the first 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.

[0046] 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 stepped surface 121c can be formed between the thin neck portion 121a and the thick neck portion 121b. The first stepped surface 121c serves as a first abutting portion; the connecting nut 111 may have a third axial end face 111b ( Figure 4 the right end face in), and the third axial end face 111b serves as a second abutting portion. During specific assembly, the thin neck portion 121a can be slidably assembled in the second hole section 111a-2, and the first stepped surface 121c can be axially abutted against the third axial end face 111b to achieve the axial abutment between the valve seat 121 and the connecting nut 111.

[0047] 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 the usage requirements can be met. Exemplarily, the second abutting portion can be a limiting structure in the form of a limiting surface or a limiting boss provided on the inner wall surface of the first hole portion 111a. The valve seat 121 has a first axial end face 121e ( Figure 6 the left end face in), 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 111a through the first axial end face 121e, which is also feasible.

[0048] The structural form of the first limiting part 121d-1 is not limited herein, as long as it can meet the usage requirements. Exemplarily, as Figure 6 shown, the first limiting part 121d-1 can be an annular boss provided on the inner wall surface of the second hole part 121d; alternatively, the inner wall of the second hole part 121d can be provided with a stepped diameter to form a limiting step surface on the inner wall of the second hole part 121d, and then axial limitation can be performed between the limiting step surface and the connecting pipe 300. It should be understood that the second hole part 121d can also be a non-through hole. For example, the second hole part 121d can include two non-connected hole segments, and the first limiting part 121d-1 can be a separating part between the two hole segments.

[0049] Within the second hole part 121d, a conical part 125a is formed on the part of the valve seat 121 close to the sealing seat 122. Specifically, as Figure 6 shown, a second step surface 121d-2 can be formed on the inner wall surface of the second hole part 121d, and the conical part 125a can be specifically formed by extending from the second step surface 121d-2 towards the sealing seat 122. Here, the conical part 125a means that its outer wall surface presents a conical shape. Referring to the Figure 2 orientation and positional relationship, the outer wall surface of the conical part 125a can be tapered from left to right.

[0050] As Figure 7 shown and combined with Figure 2 , at least a part of the sealing seat 122 is located within the second hole part 121d of the valve seat 121. The sealing seat 122 is a ring-shaped structure, and the sealing seat 122 has a third hole part 122a that penetrates axially, and the connecting pipe 300 can pass through the third hole part 122a. The sealing seat 122 is in sliding fit with the valve seat 121, specifically, the outer side of the sealing seat 122 is in sliding fit with the valve seat 121.

[0051] The sealing 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 sealing 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 sealing seat 122, and a second annular groove 122c is provided on the inner side of the sealing seat 122. Both the first annular groove 122b and the second annular groove 122c are used to accommodate the sealing member 123. For the convenience of description, the sealing members 123 in the two annular grooves are respectively called the first sealing member 123a and the second sealing member 123b. The first sealing member 123a and the second sealing member 123b can both be sealing components in the form of sealing rings, etc. As Figure 2 shown, the first sealing member 123a is located within the first annular groove 122b and is used to seal the valve seat 121 and the sealing seat 122, and the second sealing member 123b is located within the second annular groove 122c and is used to seal the connecting pipe 300 and the sealing seat 122.

[0052] Specifically, the first annular groove 122b is a concave groove; the second annular groove 122c is as follows Figure 7 As shown, the third hole portion 122a of the sealing seat 122 can also be a stepped hole, including a large hole and a small hole distributed axially. Among them, the large hole can form the second annular groove 122c. In this way, one side of the second annular groove 122c is open, which is convenient for the installation of the second seal 123b. A gasket 124 can be provided at the open position for contact with the connecting cap 112; of course, the gasket 124 can also be absent. In this case, the second seal 123b can directly contact the connecting surface 112.

[0053] The first annular groove 122b and the second annular groove 122c are arranged axially staggered. It can be understood that they can also be arranged without staggering, but in this case, the sealing seat 122 needs to be grooved on both the inner and outer sides at the same axial position. In comparison, the staggered arrangement is more conducive to ensuring the strength of the sealing seat 122 and the radial dimensions of the corresponding annular grooves.

[0054] On the side of the third hole portion 122a away from the second annular groove 122c, an annular conical surface 122a-1 is further provided, and this conical surface 122a-1 can be used as a pushing portion.

[0055] As Figure 8 shown, the connecting cap 112 includes a cylindrical portion 112a and a cover plate portion 112b. The cylindrical portion 112a is sleeved outside the valve seat 121, and the cylindrical portion 112a is connected to the connecting nut 111. The cover plate portion 112b is covered at one end of the cylindrical portion 112a axially, specifically, it is covered at the end of the cylindrical portion 112a away from the joint portion 210. The cover plate portion 112b serves as the bottom of the cylindrical portion 112a. The cover plate portion 112b and the cylindrical portion 112a can be an integral structure or a split-fixed structure. The cover plate portion 112b is an annular plate-like structure with a through hole, and the connecting pipe 300 can pass through the through hole of the cover plate portion 112b, and then can pass through the sealing seat 122 and abut against the limiting portion 121d-1.

[0056] As Figure 2 shown, the cover plate portion 112b of the connecting cap 112 is in axial contact with the seal 123 located in the second annular groove 122c. Since one side of the second annular groove 122c facing the cover plate portion 112b is open, a gasket 124 can be provided on the side of the second seal 123b facing the cover plate portion 112b, which is beneficial to transmitting the pushing force to the second seal 123b. The cover plate portion 112b directly contacts the gasket 124 to axially limit the second connecting assembly 120, so that the second connecting assembly 120 can be encapsulated between the connecting nut 111 and the connecting cap 112. Of course, the cover plate portion 112b can also directly push against the second seal 123b, that is, the gasket 124 can be omitted.

[0057] Combined with Figure 1 andFigure 2 When the valve seat 121 and the connecting nut 111 abut against each other axially, there is a first sliding gap between the sealing seat 122 and the cover plate portion 112b. 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 112b. At this time, the second sliding gap is X2, and X2 is greater than X1.

[0058] At the beginning of specific assembly, the connecting pipe 300 can be inserted into the second connecting assembly 120 first. Due to the existence of the above-mentioned first sliding gap X1 and second sliding gap X2, the second sealing member 123b can have no compressive force or a relatively small compressive force axially. Correspondingly, the compression amount of the second sealing member 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 member 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 made to abut against each other axially to achieve a hard seal fit 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 already abutted, the axial position of the valve seat 121 no longer changes. In this way, rotating the connecting nut 111 can drive the connecting cap 112 to move axially together, and then generate an axial displacement relative to the valve seat 121, that is, it can drive the cover plate portion 112b of the connecting cap 112 to approach the valve seat 121 and the sealing seat 122 for displacement, so as to reduce the first sliding gap X1 and the second sliding gap X2, and the compression amount of the second sealing member 123b can be increased, thereby realizing a soft seal fit between the second connecting assembly 120 and the connecting pipe 300. When the first sliding gap X1 is completely eliminated, the compression amount of the second sealing member 123b reaches the maximum value.

[0059] Combined with Figure 9 When the connecting nut 111 and the joint head 210 are continuously tightened, the cover plate portion 112b of the connecting cap 112 continuously approaches the valve seat 121, pushing the gasket 124 to compress the second sealing member 123b. After moving a distance X1, the cover plate portion 112b will contact the sealing seat 122 and start to axially push the sealing seat 122. It can be seen that the cover plate portion 112b can also indirectly push the sealing seat 122. Specifically, the cover plate portion 112b can push the sealing seat 122 to displace through the second sealing member 123b. At this time, the above-mentioned first sliding gap X1 is not eliminated.

[0060] In summary, the cover plate portion 112b pushing against the sealing seat 122 can further reduce the second sliding gap X2. The conical surface 122a-1 (i.e., the pushing portion) of the sealing seat 122 can act on the conical portion 125a of the valve seat 121 to force the conical portion 125a to deform. In this way, the conical portion 125a can clamp the connecting pipe 300, so that a hard seal fit can be achieved between the conical portion 125a and the connecting pipe 300. At this time, a hard seal fit can also be formed between the conical surface 122a-1 and the conical portion 125a.

[0061] In this way, in the embodiment of the present invention, there are both a hard seal fit and a soft seal fit between the second connecting assembly 120 and the connecting pipe 300, and the sealing reliability is higher.

[0062] At the installation end point, the above-mentioned first sliding gap X1 and the second sliding gap X2 can both be eliminated. In this way, the deformation amounts of the second seal 123b and the conical portion 125a can both reach the maximum values, and the sealing performances of the hard seal fit and the soft seal fit can both reach the best. Of course, the above-mentioned first sliding gap X1 and the second sliding gap X2 may not be eliminated, which can be specifically determined in combination with actual compression amount requirements, etc.

[0063] Here, the deformation and clamping of the connecting pipe 300 by the conical portion 125a of the valve seat 121 mainly rely on the radial clamping component force generated by the conical surface 122a-1 pressing tightly. The seal of the conical portion 125a belongs to a hard seal. At least the conical portion 125a of the valve seat 121 is made of a hard material, such as a metal material, such as stainless steel. The conical setting of its outer wall surface is conducive to the deformation of the conical portion 125a, and thus the hard seal is realized. It can be seen that other pushing portions other than the conical surface 122a-1 can also be provided on the inner wall of the sealing seat 122. For example, the pushing portion can be an annular boss. If the conical portion 125a is conical, when the conical portion 125a 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 125a, the pushing portion will generate a radial component force on the conical portion 125a to force the conical portion 125a to deform and clamp the connecting pipe 300. At the same time, hard seals are formed between the conical portion 125a, the sealing seat 122, and the connecting pipe 300.

[0064] Combined with the above analysis, it can be seen that the embodiment of the present invention has the following technical effects:

[0065] Through the sliding arrangement between the valve seat 121 and the connecting nut 111, the compression amount of the second seal 123b for contacting and 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 seal 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 matching 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 second seal 123b can be pushed to increase the compression amount of the second seal 123b, 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.

[0066] That is to say, the joint assembly 100 provided by the embodiment of the present invention can take into account the convenience of installation and the reliability of connection. Moreover, the setting of the conical portion 125a of the valve seat 121 can increase the hard seal fit, combined with the soft seal fit of the seal 123, which can improve the sealing performance with the connecting pipe 300.

[0067] In addition, the valve seat 121 and the joint head 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.

[0068] In the above implementation manner, the seal 123 includes a first seal 123a and a second seal 123b, and the second seal 123b is arranged in the second annular groove 122c. In this way, when the compression amount of the second seal 123b reaches a certain value (the above-mentioned first sliding gap X1 disappears), the cover plate portion 112b can directly act on the seal seat 122, which can greatly reduce the problem of crushing the second seal 123b. However, in fact, the above-mentioned first annular groove 122b and second annular groove 122c may not be provided, and then the seal 123 is directly arranged between the seal seat 122 and the cover plate portion 112b. At this time, the cover plate portion 112b can exert a force on the seal 123, and the seal 123 can indirectly push against the seal seat 122; in this implementation manner, the seal 123 can simultaneously achieve the sealing between the connecting pipe 300 and the valve seat 121.

[0069] In addition, in the above implementation, 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, facilitating the insertion of the connecting pipe 300 in place. From the subsequent description of the assembly process, it can be known that when the joint part 210 and the first hole section 111a-1 are tightened in thread, there will be a distance between the third axial end face 111b and the first step face 121c in the axial direction, that is, they will no longer abut. Therefore, if the valve seat 121 and the connecting nut 111 do not axially abut, 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 axially abut, the connecting nut 111 and the connecting cap 112 are separately arranged to install the valve seat 121. If it is not limited to axially abutting, the connecting nut 111 and the connecting cap 112 can also be integrally arranged. For example, the cylindrical parts 112a of the connecting nut 111 and the connecting cap 112 are arranged to have approximately the same diameter. Similarly, in the above embodiment, the first limiting part 121d-1 is mentioned to limit the connecting pipe 300 to clarify the insertion of the connecting pipe 300 in place. But actually, such a limit can also be not carried out. As long as the connecting pipe 300 can pass through the conical part 125a, it can be clamped by the conical part 125a in the subsequent assembly process. But as mentioned before, setting the first limiting part 121d-1 and axially abutting the connecting nut 111 and the valve seat 121 are all to facilitate the assembly to be carried out more easily.

[0070] As Figure 2 shown, the cylindrical part 112a 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 relatively high sealing performance can be achieved. At the same time, since there is no need to set a thread on the cylindrical part 112a, the thickness of the cylindrical part 112a 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.

[0071] Specifically, still as Figure 4 shown, the outer wall surface of the connecting nut 111 can have a fourth axial end face 111c. The fourth axial end face 111c and the third axial end face 111b can be arranged to be axially misaligned. The cylindrical part 112a can abut against the fourth axial end face 111c, and then can be welded to the fourth axial end face 111c.

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

[0073] The present invention 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.

[0074] Please refer to Figure 10 , Figure 10 which is a schematic flow chart of the assembly method of the valve device provided by the embodiment of the present invention.

[0075] The present invention also provides an assembly method of a valve device, which is applicable to the above-mentioned valve device. As Figure 10 shown, the assembly method includes the following steps S1 to S4.

[0076] Step S1, configure the valve component 200, the joint assembly 100, and the connecting pipe 300.

[0077] 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 first limiting portion 121d-1 can be axially abutted to indicate that the connecting pipe 300 is inserted in place.

[0078] Step S3, screw the connecting nut 111 onto the joint portion 210 so that the joint portion 210 and the valve seat 121 of the second connecting assembly 120 are directly abutted 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 112b is displaced towards the second connecting assembly 120, and the cover plate portion 112b pushes against the seal 123, specifically, it can abut against the second seal 123b to increase the deformation amount of the second seal 123b.

[0079] Step S4, continue to increase the thread fit dimension between the joint portion 210 and the connecting nut 111, then the cover plate portion 112b can push against the seal seat 122, and the conical portion 125a of the valve seat 121 can contact and then abut against the conical surface 122a-1 of the seal seat 122, and the conical portion 125a is deformed to clamp the connecting pipe 300. At this time, the joint portion 210 and the first hole section 111a-1 are in a state where the threading is completed.

[0080] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

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 assembly (110), including a connected connection nut (111) and a connection cap (112). The connection nut (111) is provided with a first hole portion (111a), and the first hole portion (111a) includes a first hole segment (111a-1). The first hole segment (111a-1) is provided with an internal thread for threaded connection with the joint head (210). The connection cap (112) includes a cover plate portion (112b); A second connection assembly (120), including a valve seat (121), a sealing seat (122), and a sealing member (123). The valve seat (121) is an integral structure and is provided with a second hole portion (121d). At least a part of the sealing seat (122) is located within the second hole portion (121d). The valve seat (121) is provided with a conical portion (125a) facing the sealing seat (122), and the sealing seat (122) is provided with a pushing portion; When the joint head (210) is tightened with the first hole segment (111a-1), the cover plate portion (112b) axially pushes the sealing member (123). The sealing member (123) can be deformed to form a soft seal fit with the connecting pipe (300). The pushing portion abuts against the outer wall surface of the conical portion (125a). The conical portion (125a) can be deformed to form a hard seal fit with the connecting pipe (300), and the conical portion (125a) and the pushing portion also form a hard seal fit.

2. The joint assembly according to claim 1, wherein, The sealing member (123) is provided between the sealing seat (122) and the valve seat (121), and the sealing member (123) is also provided between the sealing seat (122) and the connecting pipe (300).

3. The joint assembly according to claim 2, wherein, The sealing seat (122) includes an inner side and an outer side distributed radially. The outer side of the sealing seat (122) is provided with a first annular groove (122b), and the inner side of the sealing seat (122) is provided with a second annular groove (122c). The first annular groove (122b) and the second annular groove (122c) are respectively used to accommodate corresponding parts of the sealing member (123). The first annular groove (122b) and the second annular groove (122c) are axially offset. The second annular groove (122c) is close to the cover plate portion (112b), and the side of the second annular groove (122c) facing the cover plate portion (112b) is open.

4. The joint assembly according to claim 3, wherein The second connection assembly (120) further includes a gasket (124). A gasket (124) is provided between the sealing member (123) between the sealing seat (122) and the connecting pipe (300) and the cover plate portion (112b).

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

6. The joint assembly according to claim 1, wherein, The seal seat (122) is provided with a third hole portion (122a), and an annular tapered surface (122a-1) is formed in the third hole portion (122a), and the tapered surface (122a-1) is the pushing portion.

7. The joint assembly according to any one of claims 1-6, characterized in that, When the joint portion (210) and the first hole section (111a-1) are in a screwed and tightened state, the valve seat (121) and the joint portion (210) are directly abutted to achieve a hard seal fit.

8. The joint assembly according to claim 7, wherein, One end of the valve seat (121) facing away from the cover plate portion (112b) forms an annular first edge (121f) and an annular second edge (121g). The joint portion (210) has a second axial end face (211) facing the valve seat (121), and the second axial end face (211) is an annular tapered surface. The first edge (121f) and the second edge (121g) are both abutted and sealed with the second axial end face (211).

9. The joint assembly according to any one of claims 1-6, characterized in that The connecting cap (112) includes a cylindrical portion (112a) and the cover plate portion (112b). At least a part of the valve seat (121) in the axial direction is located in the cylindrical portion (112a), and the cylindrical portion (112a) is connected to the connecting nut (111).

10. A valve device, characterized in that, It includes a valve component (200). The valve component (200) includes a joint portion (210), a connecting pipe (300) and a joint assembly (100). The joint assembly (100) is the joint assembly according to any one of claims 1-9. The connecting nut (111) is threadedly connected to the joint portion (210), and the connecting pipe (300) is inserted into the second connecting assembly (120).

11. A method for assembling a valve device, characterized in that, Applicable to the valve device according to claim 10, 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 (100); Screw the connecting nut (111) onto the joint portion (210) so that the joint portion (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 portion (210) and the connecting nut (111) so that the cover plate portion (112b) is displaced towards the second connecting assembly (120), and the cover plate portion (112b) pushes against the seal (123); Continue to increase the threaded fit dimension between the joint portion (210) and the connecting nut (111), and the cover plate portion (112b) pushes against the seal seat (122), so that the pushing portion tightly abuts against the tapered portion (125a), and the tapered portion (125a) deforms to clamp the connecting pipe (300).

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