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 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; conical parts are arranged on the two sides of the second sealing seat, and the valve seat and the first sealing seat are provided with pushing parts; 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 two pushing parts abut against the outer wall faces of the two conical parts respectively, the conical parts can deform to be in hard sealing fit with the connecting pipe, and the conical parts and the pushing parts 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 in the joint assembly to achieve the sealed assembly of the connecting pipe and the joint assembly. However, in the related art, the compression amount of the seal is fixed, resulting in very difficult insertion of the connecting pipe.

[0003] Therefore, how to provide a solution to overcome or alleviate the above defects is still a technical problem that those skilled in the art urgently need to solve. 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. 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 in the second hole portion. Conical portions are provided on both sides of the second seal seat, and both the valve seat and the first seal seat are 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 two pushing portions respectively abut against the outer wall surfaces of the two conical portions, and the conical portions can be deformed to form a hard seal fit with the connecting pipe. A hard seal fit is also formed between the conical portion and the pushing portion.

[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 can abut against the connecting nut axially, and the compression amount of the seal can be relatively small, which is convenient for the installation of the connecting pipe; after the connecting pipe is installed, 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 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 part, a connecting pipe and a joint assembly, the joint assembly is the above-mentioned joint assembly, the connecting nut is threadedly connected with 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 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 5Schematic structural diagram of the 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] Explanation of 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. Detailed implementation manners

[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 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 limited, the terms "installed", "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] In the embodiments of the present invention, the directional terms mentioned, such as "inside", "outside", 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 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 not only includes those elements but also includes other elements not expressly listed, or further includes 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 a schematic structural view of the connecting nut, Figure 4 is Figure 3 a half-sectional view of Figure 5 a schematic structural view of the valve seat, Figure 6 is Figure 5 a sectional view of Figure 7 a sectional view of the first sealing seat, Figure 8 a sectional view of the connecting cap, Figure 9 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 member 200. In this application scenario, the joint portion 210 can be the joint of the valve member 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 component 110 and a second connection component 120.

[0038] The first connection component 110 includes a connection nut 111 and a connection cap 112. It can be seen from Figure 2 that in the first connection component 110, the connection nut 111 and the connection cap 112 are assembled together to form a cylindrical structure with a bottom. The connection nut 111 is used to connect with the joint portion 210, the second connection component 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 component 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 provided with internal threads. The first hole section 111a-1 and the second hole section 111a-2 can be axially adjacent, or a separating 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 can 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 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, but 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 axially abut and seal 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, 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 abut on the second axial end face 211. In this way, the hard seal fit between the valve seat 121 and the joint head 210 along the axial direction can be realized. This sealing method is line sealing and is two-line sealing, with relatively reliable sealing, simple processing, high reliability, and relatively low risk of leakage. Here, the first edge 121f and the second edge 121g 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 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, and this 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 carried out between the limiting step surface and the connecting pipe 300. 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 conical surface 122a-1 can also be formed on the inner wall surface of the second hole portion 121d, and the conical surface 122a-1 can be used as the pushing portion of the valve seat 121.

[0050] 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; moreover, the setting of the second limiting portion 121d-2 can also limit the deformation amount of the conical portion 125a of the second sealing seat 125 by the pushing portion of the valve seat 121. 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.

[0051] 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.

[0052] 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 2As shown, the first seal 123a is located within the first annular groove 122b for sealing the valve seat 121 and the first seal seat 122, and the second seal 123b is located within the second annular groove 122c for sealing the connecting pipe 300 and the first seal seat 122.

[0053] Specifically, the first annular groove 122b is a concave groove; the second annular groove 122c is as Figure 7 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 the second annular groove 122c. In this way, one side of the second annular groove 122c is open, which can facilitate 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.

[0054] The first annular groove 122b and the second annular groove 122c are arranged axially offset. It can be understood that they can also be arranged without 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.

[0055] 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 serve as the pushing portion of the first seal seat 122.

[0056] The second seal seat 125 includes two conical portions 125a and an annular seat body portion 125b. The annular seat body portion 125b can axially abut against the second limiting portion 121d-2 to limit the installation position of the second seal seat 125 within the valve seat 121 and can limit the deformation amount of the valve seat 121 with respect to the conical portion 125a of the second seal seat 125. The two conical portions 125a can be located at the inner edge of the annular seat body portion 125b, and the two conical portions 125a can be respectively located on both sides of the annular seat body portion 125b. One of the conical portions 125a can extend towards the first seal seat 122, and the other conical portion 125a can extend in a direction away from 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 right conical portion 125a can be tapered from left to right, and the outer wall surface of the left conical portion 125a can be tapered from right to left.

[0057] As Figure 8As 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 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 a ring-shaped plate structure with a through hole. The connecting pipe 300 can pass through the through hole of the cover plate portion 112b, and then can pass through the first sealing seat 122 and the second sealing seat 125 and abut against the limiting portion 121d-1.

[0058] As Figure 2 shown, the cover plate portion 112b of the connecting cap 112 and the seal 123 in the second annular groove 122c are in axial contact. Since the 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 abutting thrust 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 abut against the second seal 123b, that is, the gasket 124 can be omitted.

[0059] Combined with Figure 1 and Figure 2 , when the valve seat 121 and the connecting nut 111 abut axially, there is a first sliding gap between the first 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. There is a third sliding gap between the annular seat body portion 125b and the second limiting portion 121d-2, and the third sliding gap is X3.

[0060] At the beginning of the specific assembly, the connecting pipe 300 can be inserted into the second connecting component 120 first. Due to the existence of the above-mentioned first sliding gap X1 and the second sliding gap X2, the second seal 123b can have no compressive force or a relatively small compressive force axially. 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 part 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 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 part 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, so as to achieve a soft seal fit between the second connecting component 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.

[0061] Combined Figure 9 , when the connecting nut 111 and the joint head 210 are continuously tightened, the cover plate part 112b of the connecting cap 112 continuously approaches the valve seat 121, pushing the gasket 124 to compress the second seal 123b. After moving a distance X1, the cover plate 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.

[0062] In summary, the cover plate portion 112b pushing against the first seal seat 122 can further reduce the second sliding gap X2. The conical surface 122a-1 (i.e., the pushing portion) of the first seal seat 122 can interact with a conical portion 125a of the second seal seat 125. At the same time, the other conical portion 125a of the second seal seat 125 can also interact with the conical surface 122a-1 of the valve seat 121. The third sliding gap X3 can be reduced or even eliminated. The two conical portions 125a can be deformed, so as to clamp the connecting pipe 300, thereby achieving a hard seal fit between the conical portion 125a and the connecting pipe 300. Since the number of conical portions 125a is two, two hard seal fits can be formed between the second seal seat 125 and the connecting pipe 300, and the reliability can be higher. And at this time, the two conical portions 125a can also form hard seal fits with the conical surface 122a-1 of the valve seat 121 and the first seal seat 122 respectively.

[0063] In this way, in the embodiment of the present invention, there are both hard seal fits and soft seal fits between the second connection assembly 120 and the connecting pipe 300, and there are two hard seal fits, so the sealing reliability is higher.

[0064] At the installation end point, the above-mentioned first sliding gap X1, second sliding gap X2, and third sliding gap X3 can all 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, second sliding gap X2, and third sliding gap X3 may not be eliminated, which can be specifically determined in combination with actual compression amount requirements, etc.

[0065] Here, the deformation and clamping of the connecting pipe 300 by the conical portion 125a of the second seal seat 125 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. 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 beneficial 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 walls of the first seal seat 122 and the valve seat 121. 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 and the first seal seat 122 and the connecting pipe 300.

[0066] As can be seen from the above analysis, the embodiments of the present invention have the following technical effects:

[0067] 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 and the connecting nut 111 can abut against each other 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 engagement 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.

[0068] That is to say, the joint assembly 100 provided by the embodiments of the present invention can take into account the convenience of installation and the reliability of connection. Moreover, the arrangement 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.

[0069] In addition, the valve seat 121 and the joint head 210 are directly in abutting seal, with fewer sealing points and better sealing performance, which can reduce the leakage risk. Further, it can be the abutting line seal as described above, and the seal is more reliable.

[0070] 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 first seal seat 122, which can greatly reduce the problem of crushing the second seal 123b. 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 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 manner, the seal 123 can simultaneously achieve the seal between the connecting pipe 300 and the valve seat 121.

[0071] 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. As can be seen from the subsequent description of the assembly process, 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 be 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 realized. At this time, by extended understanding, because the connecting nut 111 and the valve seat 121 are axially abutted and the connecting nut 111 and the connecting cap 112 are separately arranged to install the valve seat 121, if it is not limited to axial abutment, the connecting nut 111 and the connecting cap 112 can also be integrally arranged. For example, the cylindrical parts 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 that the connecting pipe 300 is inserted in place. However, in fact, such a limit can also be not set. 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. However, as mentioned above, setting the first limiting part 121d-1 and axially abutting the connecting nut 111 and the valve seat 121 are both convenient for the assembly to be carried out more easily.

[0072] 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.

[0073] Specifically, still as Figure 4 shown, the outer wall surface of the connecting nut 111 can have a fourth axial end face 111c, and the fourth axial end face 111c and the third axial end face 111b can be arranged to be offset in the axial direction. The cylindrical part 112a can be abutted against the fourth axial end face 111c, and then can be welded to the fourth axial end face 111c.

[0074] 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.

[0075] 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.

[0076] Please refer to Figure 10 , Figure 10 which is a schematic flow chart of the assembling method of the valve device provided by the embodiment of the present invention.

[0077] The present invention also provides an assembling method of a valve device, which is applicable to the above-mentioned valve device. As Figure 10 shown, the assembling method includes the following steps S1 to S4.

[0078] Step S1: Configure the valve component 200, the joint assembly 100, and the connecting pipe 300.

[0079] 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.

[0080] Step S3: Screw the connecting nut 111 onto the joint portion 210 so that the joint portion 210 directly abuts against the valve seat 121 of the second connecting assembly 120 to achieve a hard seal fit, and continuously increase the thread fit dimension between the joint portion 210 and the connecting nut 111, so that the cover portion 112b is displaced towards the second connecting assembly 120, and the cover portion 112b abuts against the sealing member 123, specifically, it can abut against the second sealing member 123b to increase the deformation amount of the second sealing member 123b.

[0081] Step S4: Continuously increase the thread fit dimension between the joint portion 210 and the connecting nut 111, then the cover portion 112b can abut against the first sealing seat 122, one conical portion 125a of the second sealing seat 125 can contact and then abut tightly against the conical surface 122a-1 of the first sealing seat 122, and the other conical portion 125a of the second sealing seat 125 can contact and then abut tightly against the conical surface 122a-1 of the valve seat 121, and both conical portions 125a can be deformed and 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.

[0082] 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 retouches can be made, and these improvements and retouches 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 section (111a-1). The first hole section (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 first seal seat (122), a second seal seat (125), and a seal (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). Both sides of the second seal seat (125) are provided with tapered portions (125a), and both the valve seat (121) and the first seal seat (122) are provided with pushing portions; When the joint head (210) is tightened with the first hole section (111a-1), the cover plate portion (112b) axially pushes the seal (123). The seal (123) can be deformed to form a soft seal fit with the connecting pipe (300). The two pushing portions respectively abut against the outer wall surfaces of the two tapered portions (125a). The tapered portions (125a) can be deformed to form a hard seal fit with the connecting pipe (300), and the tapered portions (125a) also form a hard seal fit with the pushing portions.

2. The joint assembly according to claim 1, wherein, The seal (123) is provided between the first seal seat (122) and the valve seat (121), and the seal (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. The outer side of the first seal seat (122) is provided with a first annular groove (122b), and the inner side of the first seal 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 seal (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, characterized in that, The second connection assembly (120) further includes a gasket (124). The gasket (124) is provided between the seal (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, characterized in that, 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 A second limiting portion (121d-2) is formed in the second hole portion (121d). The second seal seat (125) includes an annular seat body portion (125b). Both of the conical portions (125a) are connected to the annular seat body portion (125b), and the two conical portions (125a) are respectively located on the axial two sides of the annular seat body portion (125b). The two conical portions (125a) are both located at the inner edge of the annular seat body portion (125b). The annular seat body portion (125b) and the second limiting portion (121d-2) are in axial abutment.

7. The joint assembly according to claim 1, wherein The first seal seat (122) is provided with a third hole portion (122a). Annular conical surfaces (122a-1) are formed in both the second hole portion (121d) and 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 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.

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 joint portion (210) has a second axial end face (211) facing the valve seat (121). The second axial end face (211) is an annular conical surface. The first edge (121f) and the second edge (121g) are both in abutment and sealing 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 in the cylindrical portion (112a). 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 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 1-10. The connecting nut (111) is threadedly connected to the joint portion (210). 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 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); Continuously increase the thread fit dimension between the joint head (210) and the connecting nut (111), such that the cover plate portion (112b) pushes against the first sealing seat (122), causing the pushing portion to tightly press against the conical portion (125a), and the conical portion (125a) deforms to clamp the connecting pipe (300).

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