CN218564468U

CN218564468U - Reversing valve

Info

Publication number: CN218564468U
Application number: CN202121947320.XU
Authority: CN
Inventors: 杨剑; 俞舟; 熊匀均
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2023-03-03
Anticipated expiration: 2031-08-18

Abstract

The utility model relates to a valve technical field especially relates to a reversing valve. The reversing valve comprises a valve body, a valve seat and a sliding block, wherein the valve body is internally provided with a valve cavity, the valve seat is arranged in the valve cavity, and the sliding block is positioned in the valve cavity and can slide on the valve seat; the valve seat comprises a sealing seat and a positioning seat; the sealing seat and the positioning seat are welded and hermetically connected with the inner wall of the valve cavity respectively; the sealing seat is positioned above the positioning seat along the sliding direction perpendicular to the sliding block, and the sealing seat and the positioning seat are arranged at intervals. The disk seat that this application set up compares with disk seat weight among the prior art lighter, and structural cost is lower to, this application can eliminate the interference that the thermal expansion produced between seal receptacle and the positioning seat, and then solves the problem that the seal receptacle welding is bad, the location is makeed mistakes, with the sealing performance who improves between disk seat and the valve body.

Description

Reversing valve

Technical Field

The utility model relates to a valve technical field especially relates to a reversing valve.

Background

The valve seat of the existing reversing valve is generally made into a blank by section bar or powder metallurgy and the like, then machining is carried out, the valve body is of an integrated solid structure, the weight is heavy, the manufacturing cost is high, welding is poor due to incomplete melting of welding materials caused by insufficient heat when welding, gaps and the like appear at the welding position, and the sealing performance of the reversing valve is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a diverter valve that is light in weight, inexpensive to manufacture, and has good weldability and sealing properties.

The utility model provides a reversing valve, which comprises a valve body, a valve seat and a slide block, wherein the valve body is internally provided with a valve cavity, the valve seat is arranged in the valve cavity, and the slide block is positioned in the valve cavity and can slide on the valve seat; the valve seat comprises a sealing seat and a positioning seat; the sealing seat and the positioning seat are respectively welded and hermetically connected with the inner wall of the valve cavity; the sealing seat is positioned above the positioning seat along the sliding direction perpendicular to the sliding block, and the sealing seat and the positioning seat are arranged at intervals.

In one embodiment, the reversing valve further comprises a connecting pipe, a positioning hole is formed in the positioning seat, a communicating hole corresponding to the positioning hole is formed in the sealing seat, and the communicating hole is communicated with the valve cavity; the inner wall of the communicating hole is provided with a positioning step, one end of the connecting pipe penetrates through the communicating hole, extends into the communicating hole and abuts against the positioning step.

In one embodiment, the communication hole is provided as a stepped hole having the positioning step formed on an inner wall thereof.

In one embodiment, the positioning seat is provided with a first accommodating groove for accommodating solder, and the first accommodating groove is communicated with the positioning hole.

In one embodiment, the sealing seat is provided with a first mounting surface which is matched with the cavity wall of the valve cavity.

In one embodiment, the valve body is of a cylindrical structure, and the cross section of the valve cavity is circular; the first mounting surface is an arc surface.

In one embodiment, the radius of the circular arc of the first mounting surface is smaller than or equal to the inner diameter of the valve cavity.

In one embodiment, the first mounting surface is provided with a second receiving groove for receiving solder.

In one embodiment, the positioning seat is provided with a second mounting surface which is matched with the cavity wall of the valve cavity; the valve body is of a cylindrical structure, and the cross section of the valve cavity is circular; the second mounting surface is an arc surface.

In one embodiment, the radius of the circular arc of the second mounting surface is smaller than or equal to the inner diameter of the valve cavity.

Compared with the prior art, the reversing valve provided by the invention has the following beneficial effects:

the utility model provides a reversing valve, its valve seat includes seal receptacle and positioning seat, when the installation, reserves the clearance between seal receptacle and the positioning seat, occupation space when the valve seat assembly compare in the unchangeable prerequisite of prior art under, equivalent to reduced the thickness of seal receptacle and positioning seat, has left out the structure between seal receptacle and the positioning seat to lighten the holistic weight of valve seat, reduced the structure cost; and, when welding seal receptacle and positioning seat, both are heated the inflation, through reserving the space between the two during the installation, avoid both to produce when heating the inflation and interfere to eliminate the seal receptacle aversion that mutual interference arouses, cause the risk that the seal receptacle welding is bad, the location is makeed mistakes, and then improve the sealing performance between disk seat and the valve body.

Drawings

Fig. 1 is an exploded view of a reversing valve according to an embodiment of the present invention.

Fig. 2 is a side view of the reversing valve in an embodiment of the present invention.

Fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A in fig. 2.

Fig. 4 is a sectional view taken along line B-B in fig. 3.

Fig. 5 is a structural schematic diagram of the valve seat in fig. 2.

Fig. 6 is a cross-sectional view of the valve seat of fig. 5.

In the figure, 100, a reversing valve; 10. a valve body; 11. a valve cavity; 20. a valve seat; 21. a sealing seat; 211. a communicating hole; 212. positioning a step; 213. a first mounting surface; 214. a second accommodating groove; 22. positioning seats; 221. positioning holes; 222. a first accommodating groove; 223. a second mounting surface; 30. welding flux; 40. and (6) taking over the pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-6, the direction valve 100 includes a valve body 10, a valve seat 20, and a slider (not shown); the valve body 10 is internally provided with a valve cavity 11, a valve seat 20 is arranged in the valve cavity 11, the sliding block is positioned in the valve cavity 11, and the sliding block can slide on the valve seat 20 and is in sealing fit with the valve seat 20. Wherein, the valve seat 20 comprises a sealing seat 21 and a positioning seat 22; the sealing seat 21 and the positioning seat 22 are respectively welded and hermetically connected with the inner wall of the valve cavity 11; and, along the sliding direction of perpendicular to slider, sealed seat 21 is located positioning seat 22 top, and sets up with the interval between positioning seat 22. Wherein, the sealing seat 21 is used for sealing and matching with the sliding block.

The traditional reversing valve seat is usually processed by stainless steel profiles or powder metallurgy, the valve seat formed after processing is a solid integral structure, the processing procedures are multiple, the process is complex, the manufacturing cost of the valve seat is higher, the valve seat with the integral solid structure is easy to be heated insufficiently during welding, the welding is not completely melted, poor welding is caused, gaps and the like appear at the welding position, and the sealing performance of the reversing valve is seriously influenced.

The utility model provides a reversing valve, its seal receptacle 21 and positioning seat 22 components of a whole that can function independently set up, when the installation, reserve the clearance between seal receptacle 21 and the positioning seat 22, occupation space when the valve seat 20 assembles compares in the unchangeable prerequisite of prior art, is equivalent to having reduced the thickness of seal receptacle 21 and positioning seat 22, has left out the structure between seal receptacle 21 and the positioning seat 22 to lighten the whole weight of valve seat 20, reduced the structure cost; moreover, when the sealing seat 21 and the positioning seat 22 are welded, the two are heated to expand, and if the sealing seat 21 and the positioning seat 22 are arranged in a close contact manner, the two are mutually extruded, so that the problems of displacement of the sealing seat 21 and poor positioning are caused; especially, when the positioning seat 22 and the sealing seat 21 are made of different materials, the sealing seat 21 and the positioning seat 22 deform and mutually extrude to cause more serious displacement due to different material deformation coefficients at the same welding temperature; this application is through reserving the space between seal receptacle 21 and positioning seat 22, produces when avoiding both to be heated the thermal expansion and interferes to eliminate seal receptacle 21 that seal receptacle 21 and positioning seat 22 mutual interference arouse and shift, cause seal receptacle 21 to weld badly, the risk of location mistake, and then improve the sealing performance between disk seat 20 and the valve body 10.

The seal holder 21 and the positioning holder 22 are provided separately, so that they can be formed separately by manufacturing and processing according to the quality standards of the seal holder 21 and the positioning holder 22. For example, since the sealing seat 21 needs to be in sealing engagement with the slider, and the slider repeatedly rubs against the contact surface between the sealing seat 21 and the slider during use, the sealing seat 21 has high requirements on manufacturing accuracy and strength of the contact surface between the sealing seat 21 and the slider, the positioning seat 22 has a positioning function, and the positioning seat 22 has low requirements on strength and accuracy, so that the manufacturing material and the molding manner can be selected according to the requirements of the sealing seat 21 and the positioning seat 22, thereby greatly simplifying the manufacturing difficulty of the valve seat 20 and reducing the manufacturing cost.

Referring to fig. 1 to 4, the reversing valve 100 further includes a connection pipe 40, and the connection pipe 40 is used for communicating an evaporator, a compressor, a condenser, and the like in the air conditioning system.

Further, referring to fig. 1-6, in one embodiment, the positioning seat 22 is provided with a positioning hole 221, the sealing seat 21 is provided with a communication hole 211 corresponding to the positioning hole 221, and the communication hole 211 is communicated with the valve cavity 11; wherein, the inner wall of the communication hole 211 is provided with a positioning step 212, and one end of the adapter tube 40 penetrates through the communication hole 211, extends into the communication hole 211 and abuts against the positioning step 212. With such an arrangement, when the adapter tube 40 is installed, one end of the adapter tube 40 sequentially extends into the positioning hole 221 on the positioning seat 22 and the communication hole 211 on the sealing seat 21 until the end of the adapter tube 40 abuts against the positioning step 212 in the communication hole 211. The connecting pipe 40 is stopped by the positioning step 212, the connecting pipe 40 is effectively prevented from being excessively inserted into the valve cavity 11, the connecting pipe 40 is positioned and installed by the positioning step 212, the installation difficulty of the connecting pipe 40 is reduced, and the assembly efficiency is improved. In addition, the adapter tube 40 extends into the positioning hole 221, and the adapter tube 40 is radially positioned by the positioning seat 22, so that the adapter tube 40 is prevented from being displaced in the radial direction.

Preferably, referring to fig. 6, the communication hole 211 is provided as a stepped hole, and a positioning step 212 is formed on an inner wall of the stepped hole. Of course, in other embodiments, the manner of forming the positioning step 212 is not limited to the above or shown in the drawings, and for example, a convex structure may be provided on the inner wall of the communication hole 211, and the convex structure and the inner wall of the communication hole 211 may form the positioning step 212.

Specifically, in one embodiment, referring to fig. 3, three connecting pipes 40 are provided, and three corresponding communication holes 211 are provided. The three connection tubes 40 are respectively labeled as E-tube, S-tube, C-tube. One end of the E pipe, the S pipe and the C pipe extends into the corresponding communication hole 211 respectively and abuts against the positioning step 212, the other end of the E pipe is connected with the evaporator, the other end of the S pipe is connected with the compressor, and the other end of the C pipe is connected with the condenser. The slider on the seal holder 21 is slid to control the opening and closing of the communication holes 211 communicating with the tubes E, S, and C, thereby adjusting the opening and closing of the tubes E, S, and C and further adjusting the flow path of the medium in the valve body 10.

In addition, the reversing valve 100 further comprises another connecting pipe 40, and the connecting pipe 40 is marked as a D pipe, wherein one end of the D pipe is arranged on the valve body 10 and is communicated with the valve cavity 11, and the other end of the D pipe is used for being connected with a compressor.

Referring to fig. 4 and 6, the positioning seat 22 is provided with a first receiving groove 222 for receiving the solder 30, and the first receiving groove 222 is communicated with the positioning hole 221. During assembly, the solder 30 is pre-stored in the first receiving groove 222, wherein the solder 30 may be a welding ring, and the welding ring is received in the first receiving groove 222 and surrounds the outer periphery of the adapter tube 40, so that when the valve seat 20 is heated and welded, a welding liquid formed by melting the welding ring can fully fill gaps between the adapter tube 40 and the positioning seat 22 as well as between the adapter tube and the valve seat 20, and further, the sealing performance of the reversing valve 100 is improved. In addition, the solder 30 is stored in the first storage groove 222, which is also beneficial to simplifying the steps of mounting the reversing valve 100, and the solder 30 is filled at the joint of the connecting pipe 40 and the positioning seat 22 after the assembly is completed, so that due to the shielding of the valve body 10, the solder 30 may be unevenly distributed, which may cause insufficient welding between the connecting pipe 40 and the positioning seat 22, and the sealing performance cannot be guaranteed.

Referring to fig. 4 and 6, in one embodiment, the first receiving groove 222 is formed on a side surface of the positioning seat 22 facing the sealing seat 21. Of course, in other embodiments, the position of the first receiving groove 222 is not limited to the above or shown in the drawings, for example, the first receiving groove 222 may also be formed on the wall of the positioning hole 221.

Referring to fig. 2 to 6, the positioning seat 22 has a second mounting surface 223, and the second mounting surface 223 matches with the cavity wall of the valve cavity 11 to improve the sealing performance between the second mounting surface 223 and the cavity wall of the valve cavity 11.

The valve body 10 is generally cylindrical, and the cross section of the valve cavity 11 is circular; the second mounting surface 223 is thus correspondingly configured as a circular arc surface.

Preferably, the radius of the circular arc of the second mounting surface 223 is smaller than or equal to the inner diameter of the valve chamber 11. So as to ensure that a small gap exists between the second mounting surface 223 and the cavity wall of the valve cavity 11, and during welding, the welding liquid can flow into the gap between the second mounting surface 223 and the cavity wall and be uniformly distributed between the two, so that the positioning seat 22 and the valve cavity 11 are fully welded, and the sealing performance of the reversing valve 100 is improved.

Referring to fig. 2-6, the sealing seat 21 has a first mounting surface 213, and the first mounting surface 213 is matched with the cavity wall of the valve cavity 11. To improve the sealing between the first mounting surface 213 and the wall of the valve chamber 11.

The valve body 10 is of a cylindrical structure, and the cross section of the valve cavity 11 is circular; the first mounting surface 213 is formed as an arc surface.

Further, the radius of the circular arc of the first mounting surface 213 is smaller than or equal to the inner diameter of the valve chamber 11. A small gap is formed between the first mounting surface 213 and the cavity wall of the valve cavity 11, and during welding, the welding liquid can flow into the gap between the first mounting surface 213 and the cavity wall and be uniformly distributed, so that the sealing seat 21 and the valve cavity 11 are fully welded, and the sealing performance of the reversing valve 100 is improved.

Referring to fig. 4 and 6, the first mounting surface 213 is provided with a second receiving groove 214, the second receiving groove 214 is used for receiving the solder 30, and the second receiving groove 214 extends along the circumferential direction of the sealing seat 21 and is disposed in a surrounding manner. The welding flux 30 is made of welding rods, the welding rods are placed in the second accommodating groove 214 in advance during assembly, when the valve seat 20 is heated and welded, welding liquid formed by melting the welding rods can penetrate into the space between the sealing seat 21 and the cavity wall of the valve cavity 11 along the first mounting surface 213, gaps between the sealing seat 21 and the valve seat 20 are fully filled, and therefore the sealing performance of the reversing valve 100 is improved. In addition, the solder 30 is stored in the second containing groove 214, which is also beneficial to simplifying the steps of mounting the reversing valve 100, and if the solder 30 is laid at the joint of the cavity wall and the positioning seat 22 after the assembly is completed, due to the shielding of the valve body 10, the solder 30 may be unevenly distributed, which may cause the problems that the welding between the sealing seat 21 and the valve body 10 is insufficient and the sealing performance cannot be ensured.

In summary, referring to fig. 1 to 6, the present application provides a reversing valve 100, which is formed by assembling a sealing seat 21 and a positioning seat 22 that are separately arranged to form a valve seat, and selecting a suitable processing technology to manufacture the sealing seat 21 and the positioning seat 22 respectively, so as to reduce the manufacturing difficulty of the valve seat 20, simplify the processing technology flow of the valve seat 20, and reduce the processing cost of the valve seat 20. Moreover, a gap is reserved between the sealing seat 21 and the positioning seat 22, and the valve seat has the advantages that on the premise that the occupied space is not changed when the valve seat 20 is assembled, the thickness of the sealing seat 21 and the thickness of the positioning seat 22 are reduced, and the structure between the sealing seat 21 and the positioning seat 22 is omitted, so that the overall weight of the valve seat 20 is further reduced, and the structural cost is reduced; in addition, the mutual interference of the sealing seat 21 and the positioning seat 22 due to thermal expansion is avoided, the displacement of the sealing seat 21 caused by the mutual interference of the sealing seat 21 and the positioning seat 22 is eliminated, the welding of the sealing seat 21 is poor, the risk of positioning errors is avoided, and the sealing performance between the valve seat 20 and the valve body 10 is further improved.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms do not have special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. The reversing valve comprises a valve body (10), a valve seat (20) and a sliding block, wherein a valve cavity (11) is formed in the valve body (10), the valve seat (20) is installed in the valve cavity (11), and the sliding block is located in the valve cavity (11) and can slide on the valve seat (20);

the valve seat (20) is characterized by comprising a sealing seat (21) and a positioning seat (22); the sealing seat (21) and the positioning seat (22) are welded and hermetically connected with the inner wall of the valve cavity (11) respectively; the sealing seat (21) is positioned above the positioning seat (22) along the sliding direction perpendicular to the sliding block, and is arranged at intervals with the positioning seat (22).

2. The reversing valve according to claim 1, further comprising a connecting pipe (40), wherein a positioning hole (221) is formed in the positioning seat (22), a communication hole (211) corresponding to the positioning hole (221) is formed in the sealing seat (21), and the communication hole (211) is communicated with the valve cavity (11);

wherein, the inner wall of the communicating hole (211) is provided with a positioning step (212), one end of the connecting pipe (40) penetrates through the communicating hole (211) and extends into the communicating hole (211) and is abutted against the positioning step (212).

3. The reversing valve according to claim 2, wherein the communication hole (211) is provided as a stepped hole having the positioning step (212) formed on an inner wall thereof.

4. The reversing valve according to claim 2, wherein the positioning seat (22) is provided with a first accommodating groove (222) for accommodating solder, and the first accommodating groove (222) is communicated with the positioning hole (221).

5. The reversing valve according to claim 1, characterized in that the sealing seat (21) has a first mounting surface (213) thereon, and the first mounting surface (213) is fitted to a cavity wall of the valve cavity (11).

6. The reversing valve according to claim 5, characterized in that the valve body (10) is of cylindrical construction, the valve chamber (11) being circular in cross-section; the first mounting surface (213) is an arc surface.

7. The reversing valve according to claim 6, characterized in that the radius of the circular arc of the first mounting surface (213) is smaller than or equal to the inner diameter of the valve chamber (11).

8. The reversing valve according to claim 6, wherein the first mounting surface (213) defines a second receiving groove (214), and the second receiving groove (214) is used for receiving solder.

9. The reversing valve according to claim 1, characterized in that the positioning seat (22) is provided with a second mounting surface (223), and the second mounting surface (223) is matched with the cavity wall of the valve cavity (11);

the valve body (10) is of a cylindrical structure, and the cross section of the valve cavity (11) is circular; the second mounting surface (223) is an arc surface.

10. The reversing valve according to claim 9, wherein the radius of the circular arc of the second mounting surface (223) is smaller than or equal to the inner diameter of the valve chamber (11).