Joint assembly, valve device and assembling method of valve device

Abstract

The invention discloses a connector assembly, a valve device and an assembling method thereof, 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 first sealing seat, a second sealing seat and a sealing piece; the valve seat is provided with a second hole part, and at least part of the first sealing seat is located in the second hole part; one side of the second sealing seat abuts against the valve seat, the other side of the second sealing seat is provided with a conical part facing the first sealing seat, and the first 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 sealed connection, and particularly relates to a joint assembly, a valve device, and an assembly method of the valve device. Background Art

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

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

[0004] The purpose of the present invention is to provide a joint assembly, a valve device, and an assembly method of the valve device. Among them, there are both a hard seal fit and a soft seal fit between the joint assembly and the connecting pipe, which can improve the reliability of the seal and at the same time take into account the convenience of installation.

[0005] To solve the above technical problems, the present invention provides a joint assembly for realizing the connection between a joint head and a connecting pipe. The joint assembly includes:

[0006] A first connection assembly, including a connected connection nut and a connection cap. The connection 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 an internal thread for threaded connection with the joint head. The connection cap includes a cover plate portion;

[0007] A second connection assembly, including a valve seat, a first seal seat, a second seal seat, and a seal. The valve seat is provided with a second hole portion, and at least part of the first seal seat is located inside the second hole portion. One side of the second seal seat abuts against the valve seat, and the other side of the second seal seat is provided with a conical portion facing the first seal seat. The first seal seat is provided with a pushing portion;

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

[0009] Through the sliding setting between the valve seat and the connecting nut, the compression amount of the seal for contacting and sealing the connecting pipe can be adjusted. When installing the connecting pipe first, the valve seat and the connecting nut can abut against each other axially, and the compression amount of the seal can be relatively small, which is convenient for the installation of the connecting pipe; after the installation of the connecting pipe is completed, by adjusting the thread engagement dimension between the connecting pipe and the connecting nut, the relative displacement between the valve seat and the connecting cap can be driven, and the seal can be pushed against to increase the compression amount of the seal, 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 part of the second seal seat can increase the hard seal fit, which is combined with the soft seal fit of the seal, and can 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 part, 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 part, and the connecting pipe is inserted into the second connecting component.

[0012] The present invention also provides an assembling method for the valve device, which is applicable to the above-mentioned valve device. The assembling 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 part so that the joint part and the valve seat of the second connecting component are in hard seal fit, and continuously increasing the thread engagement dimension between the joint part and the connecting nut so that the cover plate part displaces towards the second connecting component, and the cover plate part pushes against the seal; continuing to increase the thread engagement dimension between the joint part and the connecting nut, the cover plate part pushes against the first seal seat, so that the top pushing part presses tightly against the conical part, and the conical part 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 part, 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 the first sealing seat;

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

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

[0022] Figure 10 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 limiting part, 121e First axial end face, 121f First edge, 121g Second edge, 122 First sealing seat, 122a Third hole part, 122a-1 Conical surface, 122b First annular groove, 122c Second annular groove; 123 Sealing element, 123a First sealing element, 123b Second sealing element; 124 Gasket; 125 Second sealing seat, 125a Conical part, 125b Annular seat part;

[0027] 200 Valve component, 210 Connector part, 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 solution 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 only used for descriptive purposes and cannot 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 limited, the terms "mounted", "connected", and "coupled" should be construed 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 directions 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 operate in a specific orientation, and thus cannot be construed as a limitation to 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 first 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 such an 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, and the connection cap 112 is connected to 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 penetrates the connection nut 111 along the axial direction. 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 distributed along the axial direction of 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 arranged adjacent to each other along the axial direction, or a partition 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 part 210. Specifically, the valve component 200 can be provided with the joint part 210, and the joint part 210 is provided with an external thread for cooperating with the internal thread of the first hole section 111a-1 for threaded connection.

[0041] The second connection component 120 in the embodiment of the present invention includes multiple components, specifically, it can include a valve seat 121, a first seal seat 122, a seal 123, and a second seal seat 125, and these components are all of 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 connection nut 111. The second hole section 111a-2 can be, for example, a smooth hole section, and 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 connection nut 111. The valve seat 121 can be axially abutted and sealed with the joint part 210 to achieve the seal between the joint assembly 100 and the joint part 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 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 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 part 210 has a second axial end face 211 facing the valve seat 121, and 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, the hard seal fit between the valve seat 121 and the joint part 210 along the axial direction 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. In short, the first edge 121f, the second edge 121g and the second axial end face 211 are in line contact to achieve sealing.

[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 method can also be adopted between the valve seat 121 and the joint portion 210 for sealing.

[0045] Looking further 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 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 axially abut against the third axial end face 111b to achieve the axial abutment of 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 axially abut 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 portion 121d-1 is not limited herein as long as it can meet the usage requirements. Exemplarily, as Figure 6 shown, the first limiting portion 121d-1 can be an annular boss provided on the inner wall surface of the second hole portion 121d; alternatively, the diameter of the second hole portion 121d can be changed to form a limiting step surface on the inner wall of the second hole portion 121d, and then axial limitation can be performed on 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 second hole portion 121d can include two non-connected hole segments, and the first limiting portion 121d-1 can be a separating portion between the two hole segments.

[0049] A second limiting portion 121d-2 can also be provided on the inner wall surface of the second hole portion 121d. The second limiting portion 121d-2 is used to abut against the second sealing seat 125 to limit the installation position of the second sealing seat 125 in the second hole portion 121d. The specific structural form of the second limiting portion 121d-2 can be the same as that of the aforementioned first limiting portion 121d-1, and no repetitive description will be made here.

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

[0051] The first 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 first 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 first sealing seat 122, and a second annular groove 122c is provided on the inner side of the first 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 in the first annular groove 122b to seal the valve seat 121 and the first sealing seat 122, and the second sealing member 123b is located in the second annular groove 122c to seal the connecting pipe 300 and the first sealing seat 122.

[0052] Specifically, the first annular groove 122b is a groove; the second annular groove 122c is as Figure 7As shown, the third hole portion 122a of the first seal 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 a 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 contacting the connection cap 112; of course, the gasket 124 can also be absent. In this case, the second seal 123b can directly contact the connection surface 112.

[0053] The first annular groove 122b and the second annular groove 122c are arranged axially offset. It can be understood that they can also be not offset, but in this case, the first seal seat 122 needs to be grooved on both the inner and outer sides at the same axial position. In comparison, the offset arrangement is more conducive to ensuring the strength of the first seal seat 122 and the radial dimensions of the corresponding annular grooves.

[0054] On the side of the third hole portion 122a facing 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] The second seal seat 125 includes a conical portion 125a and an annular seat portion 125b. The annular seat portion 125b is used to axially abut against the second limiting portion 121d-2 to limit the installation position of the second seal seat 125 in the valve seat 121. The conical portion 125a can be located at the inner edge of the annular seat portion 125b and can extend toward the first seal seat 122. Here, the conical portion 125a means that its outer wall surface is conical. Referring to Figure 2 the orientation and positional relationship in, the outer wall surface of the conical portion 125a can be tapered from left to right.

[0056] As Figure 8 shown, the connection 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 connection nut 111. The cover plate portion 112b is provided at one axial end of the cylindrical portion 112a, specifically 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 first seal seat 122 and the second seal seat 125 and abut against the limiting portion 121d-1.

[0057] As Figure 2As shown, the cover plate portion 112b of the connecting cap 112 and the seal 123 located in the second annular groove 122c are in axial contact. Since the second annular groove 122c is open on the side facing the cover plate portion 112b, a gasket 124 can be provided on the side of the second seal 123b facing the cover plate portion 112b, which is beneficial for transmitting the thrust 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.

[0058] Combined Figure 1 with Figure 2 , when the valve seat 121 and the connecting nut 111 are in axial contact, there is a first sliding gap between the first seal seat 122 and the cover plate portion 112b. At this time, the first sliding gap is X1, and 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.

[0059] 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, there can be no compression force or a relatively small compression force in the axial direction of the second seal 123b. Correspondingly, 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 size 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 a hard seal fit between the joint head 210 and the valve seat 121. Then, continuously increase the threaded fit size 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 112b of the connecting cap 112 to approach the valve seat 121 and the first seal 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 seal 123b can be increased, thereby realizing the 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 seal 123b reaches the maximum value.

[0060] Combined Figure 9, when the connection nut 111 and the joint part 210 are continuously tightened, the cover plate part 112b of the connection 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 part 112b will contact the first seal seat 122 and start to axially push the first seal seat 122. It can be seen that the cover plate part 112b can also indirectly push the first seal seat 122. Specifically, the cover plate part 112b can push the first seal seat 122 to displace through the second seal 123b. At this time, the above-mentioned first sliding gap X1 is not eliminated.

[0061] In summary, the cover plate part 112b pushing the first seal seat 122 can further reduce the second sliding gap X2. The conical surface 122a-1 (i.e., the pushing part) of the first seal seat 122 can interact with the conical part 125a of the second seal seat 125 to force the conical part 125a to deform. In this way, the conical part 125a can clamp the connecting pipe 300, so that a hard seal fit can be achieved between the conical part 125a and the connecting pipe 300. And at this time, a hard seal fit can also be formed between the conical surface 122a-1 and the conical part 125a.

[0062] In this way, in the embodiment of the present invention, there are both hard seal fit and soft seal fit between the second connection assembly 120 and the connecting pipe 300, and the sealing reliability is higher.

[0063] 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 part 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 can also not be eliminated, which can be specifically determined in combination with actual compression amount requirements, etc.

[0064] Here, the conical portion 125a of the second seal seat 125 deforms to clamp the connecting pipe 300 mainly by relying on the abutting of the conical surface 122a-1 to generate a radial clamping component force. The seal of the conical portion 125a belongs to a hard seal. The second seal seat 125 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, thereby realizing a hard seal. 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 first seal 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 first seal seat 122, and the connecting pipe 300.

[0065] Combined with the above analysis, it can be seen that the embodiment of the present invention has the following technical effects:

[0066] Through the sliding setting 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 size of 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 of the joint assembly 100 and the connecting pipe 300.

[0067] 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 second seal seat 125 can increase the hard seal fit, which is combined with the soft seal fit of the seal 123, and can improve the sealing performance with the connecting pipe 300.

[0068] 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.

[0069] In the above implementation, the seal 123 includes a first seal 123a and a second seal 123b. The second seal 123b is disposed 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 first 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 disposed between the first 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 first seal seat 122; in this implementation, the seal 123 can simultaneously achieve the seal between the connecting pipe 300 and the valve seat 121.

[0070] 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, which is convenient for the connecting pipe 300 to be inserted in place. From the subsequent description of the assembly process, it can be seen that when the joint portion 210 is screwed onto the first hole section 111a-1, 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 are no longer abutted. Therefore, if the valve seat 121 and the connecting nut 111 are not axially abutted, the insertion of the connecting pipe 300 can also be achieved. 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 provided 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 provided. For example, the cylindrical portions 112a of the connecting nut 111 and the connecting cap 112 are arranged to have approximately the same diameter. Similarly, in the above embodiment, it is mentioned that the first limiting portion 121d-1 is provided to limit the connecting pipe 300 to clarify the insertion in place of the connecting pipe 300. However, in fact, such a limit may not be carried out as long as the connecting pipe 300 can pass through the conical portion 125a and can be clamped by the conical portion 125a in the subsequent assembly process. However, as mentioned above, providing the first limiting portion 121d-1 and axially abutting the connecting nut 111 and the valve seat 121 are all convenient for the assembly to be carried out more easily.

[0071] Such as Figure 2As shown, the cylindrical portion 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 provide threads on the cylindrical portion 112a, the thickness of the cylindrical portion 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.

[0072] 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 offset in the axial direction. The cylindrical portion 112a can abut against the fourth axial end face 111c, and then can be welded to the fourth axial end face 111c.

[0073] It should be understood that in addition to the welding solution, other connection methods can also be adopted between the cylindrical portion 112a and the connecting nut 111, such as threaded connection, snap connection, screw connection, riveting, etc. As long as the connection is along the axial direction and can drive the connecting cap 112 to move synchronously relative to the valve seat 121 along the axial direction.

[0074] The present invention also provides a valve device, including a valve component 200, a connecting pipe 300 and the above-mentioned joint assembly 100. The valve component 200 has a joint portion 210. The connecting nut 111 of the joint assembly 100 is threadedly connected to the joint portion 210. 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 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.

[0076] 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.

[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 first limiting portion 121d-1 can be abutted along the axial direction to indicate that the connecting pipe 300 is inserted in place.

[0079] Step S3: 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 component 120 are in direct contact to achieve a hard seal fit, and continuously increase the thread fit dimension between the joint head 210 and the connecting nut 111, causing the cover plate portion 112b to displace towards the second connecting component 120. The cover plate portion 112b pushes against the seal 123, specifically, it may abut against the second seal 123b, so as to increase the deformation of the second seal 123b.

[0080] Step S4: Continue to increase the thread fit dimension between the joint head 210 and the connecting nut 111, then the cover plate portion 112b can push against the first seal seat 122, and the conical portion 125a of the second seal seat 125 can contact and then press tightly against the conical surface 122a-1 of the first seal seat 122. The conical portion 125a deforms to clamp the connecting pipe 300. At this time, the joint head 210 and the first hole section 111a-1 are in a state where the thread tightening is completed.

[0081] The above are only the preferred embodiments 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: The first connection assembly (110) includes a connecting nut (111) and a connecting cap (112) connected to each other. The connecting nut (111) is provided with a first hole portion (111a), and the first hole portion (111a) includes a first hole section (111a-1). The first hole section (111a-1) is provided with internal threads for threaded connection with the joint head (210). The connecting cap (112) includes a cover plate portion (112b). The second connection assembly (120) includes a valve seat (121), a first seal seat (122), a second seal seat (125), and a seal member (123). The valve seat (121) is provided with a second hole portion (121d), and at least a part of the first seal seat (122) is located within the second hole portion (121d). One side of the second seal seat (125) abuts against the valve seat (121), and a conical portion (125a) is provided on the other side of the second seal seat (125) and faces the first seal seat (122). The first seal seat (122) is provided with a pushing portion. When the joint head (210) is tightened with the first hole section (111a-1), the cover plate portion (112b) axially pushes the seal member (123), and the seal 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), and the conical portion (125a) can be deformed to form a hard seal fit with the connecting pipe (300). The conical portion (125a) also forms a hard seal fit with the pushing portion.

2. The joint assembly according to claim 1, characterized in that, The seal member (123) is provided between the first seal seat (122) and the valve seat (121), and the seal member (123) is also provided between the first seal seat (122) and the connecting pipe (300).

3. The joint assembly according to claim 2, wherein, The first seal seat (122) includes an inner side and an outer side distributed radially. A first annular groove (122b) is provided on the outer side of the first seal seat (122), and a second annular groove (122c) is provided on the inner side of the first seal seat (122). The first annular groove (122b) and the second annular groove (122c) are respectively used to accommodate corresponding parts of the seal member (123). The first annular groove (122b) and the second annular groove (122c) are axially offset, and 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), and the gasket (124) is provided between the seal member (123) between the first seal 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), and 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, A second limiting portion (121d-2) is formed in the second hole portion (121d). The second sealing seat (125) includes an annular seat body portion (125b). The conical portion (125a) is connected to the annular seat body portion (125b) and is located at the inner edge of the annular seat body portion (125b). The annular seat body portion (125b) axially abuts against the second limiting portion (121d-2).

7. The joint assembly according to claim 1, characterized in that, The first sealing seat (122) is provided with a third hole portion (122a), and an annular conical surface (122a-1) is formed in the third hole portion (122a). The conical surface (122a-1) serves as the pushing portion.

8. The joint assembly according to any one of claims 1-7, characterized in that, When the connector (210) and the first hole section (111a-1) are in a screwed and tightened state, the valve seat (121) and the connector (210) directly abut against each other to achieve a hard sealing fit.

9. The joint assembly according to claim 8, 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 connector (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) abut against and are sealed with the second axial end face (211).

10. The joint assembly according to any one of claims 1-7, 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 within the cylindrical portion (112a), and the cylindrical portion (112a) is connected to the connecting nut (111).

11. A valve device, characterized in that, It includes a valve component (200). The valve component (200) includes a connector (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) is threadedly connected to the connector (210), 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 (100); Screw the connecting nut (111) onto the connector (210) so that the connector (210) and the valve seat (121) of the second connecting assembly (120) achieve a hard sealing fit, and continuously increase the threaded fit dimension between the connector (210) and the connecting nut (111) so that the cover plate portion (112b) displaces towards the second connecting assembly (120), and the cover plate portion (112b) pushes against the seal (123); Continue to increase the thread fit dimension between the joint head (210) and the connecting nut (111), and the cover plate portion (112b) pushes against the first sealing seat (122), so that the pushing portion tightly presses against the conical portion (125a), and the conical portion (125a) deforms to clamp the connecting pipe (300).

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