CN115388188A

CN115388188A - Assembly method of reversible electromagnetic valve

Info

Publication number: CN115388188A
Application number: CN202110553700.3A
Authority: CN
Inventors: 熊匀均; 杨剑
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-11-25

Abstract

The invention relates to the technical field of refrigeration, in particular to an assembly method of a reversible electromagnetic valve. The assembly method of the reversible electromagnetic valve comprises a valve body, a middle end cover, a valve core assembly, a valve seat and an end cover, wherein the valve body is provided with a valve cavity with two open ends; the assembling method of the reversible electromagnetic valve comprises the following steps: the middle end cover is arranged in the valve cavity from the opening and is fixedly connected with the valve body; the valve seat is arranged in the valve cavity and fixed on the inner wall of the valve body; the valve core assembly is arranged in the valve cavity, and the valve core assembly is connected with the valve seat in a sliding mode; and covering the end covers at two ends of the valve body, and plugging the opening. According to the invention, the middle end cover is fixedly connected with the valve body, so that not only can the firmness of the middle end cover be enhanced, but also the cavity can be separated, one piston component can be omitted, and the installation steps are simplified.

Description

Assembly method of reversible electromagnetic valve

Technical Field

The invention relates to the technical field of refrigeration, in particular to an assembly method of a reversible electromagnetic valve.

Background

The reversible solenoid valve is usually installed in an air conditioning unit for realizing bidirectional circulation of a medium.

The existing reversible electromagnetic valve separates the valve cavity by matching the valve core assembly with the inner wall of the valve cavity, so that at least two piston parts are needed to separate the valve cavity, the two piston parts are moved and need to hermetically slide in the inner wall of the valve cavity, the structure is complex, the assembly method is complicated, and the assembly efficiency is influenced.

Disclosure of Invention

Based on this, the invention provides a reversing valve aiming at the technical problems, and the technical scheme is as follows:

the assembly method of the reversible electromagnetic valve comprises a valve body, a middle end cover, a valve core assembly, a valve seat and an end cover, wherein the valve body is provided with a valve cavity with two open ends; the assembling method of the reversible electromagnetic valve comprises the following steps:

the middle end cover is arranged in the valve cavity from the opening and is fixedly connected with the valve body;

the valve seat is arranged in the valve cavity and fixed on the inner wall of the valve body;

the valve core assembly is arranged in the valve cavity, and the valve core assembly is in sliding connection with the valve seat;

and covering the end covers at two ends of the valve body, and plugging the opening.

By fixedly connecting the middle end cover with the valve body, the firmness of the middle end cover can be enhanced, the chamber can be partitioned, one less piston component can be arranged, and the installation steps are simplified.

In one embodiment, the valve body is provided with a first communication port and a second communication port, and in the step of installing the intermediate end cap into the valve cavity from the opening:

the middle end cover is arranged in the valve cavity from an opening at one end of the valve body, which is close to the first communicating port and the second communicating port.

So set up, can avoid the valve pocket inner wall of opposite side by the fish tail, can make piston part smoothly slide in the valve pocket sealedly.

In one embodiment, the valve core assembly comprises a connecting rod, a piston part and a slider part, the middle end cover is provided with a mounting hole, and the step of installing the valve core assembly into the valve cavity comprises the following steps:

connecting the slider member to one end of the link;

the connecting rod and the sliding block component are installed into the valve cavity from an opening at one end, close to the first communicating port and the second communicating port, of the valve body, the connecting rod extends into the installation hole, and the sliding block component is pushed into the valve seat;

a piston member is connected to an end of the connecting rod remote from the slider member.

With this arrangement, since the piston member of the present invention has only one, the assembling steps can be simplified.

In one embodiment, the slider component includes a guide frame, a first slider and a second slider, a through hole is formed in the guide frame, the first slider and the second slider both include a first section and a second section, and the assembly method of the slider component includes:

arranging the first section of the first sliding block outside the through hole, and extending the second section of the first sliding block into the through hole;

arranging the first section of the second sliding block on one side of the through hole, which is far away from the first section of the first sliding block, and extending the second section of the second sliding block into the second section of the first sliding block;

and connecting the guide frame with the connecting rod.

By the arrangement, the movement of the sliding block component can be guided, and the sliding block component is prevented from rotating under the impact of media.

In one embodiment, the piston member includes an intermediate baffle, a first portion and a second portion, and the assembling method of the piston member includes:

and respectively placing the first part and the second part on two sides of the middle baffle plate, and fixedly connecting.

So set up, play support, the reinforcing action to first portion and second portion.

In one embodiment, the first portion includes a first baffle plate and a first bowl shaped piston, the second portion includes a second baffle plate and a second bowl shaped piston, and the step of fixedly connecting the first portion, the intermediate baffle plate and the second portion further includes:

placing the first piston bowl and the second piston bowl on opposite sides of the intermediate baffle;

and arranging the first baffle plate in the first piston bowl, and arranging the second baffle plate in the second piston bowl.

So set up, can make piston member move in the valve pocket with sealed seal to seal off the cavity of piston member both sides, make both sides cavity can form the pressure differential.

In one embodiment, the intermediate end cap is fixed to the valve body by welding.

So set up, can strengthen the fastness of middle end cover installation.

In one embodiment, the outer side wall of the intermediate end cover is provided with a solder groove, and solder or a solder ring is placed in the solder groove before the intermediate end cover is welded with the valve body.

So set up, make things convenient for the welding of middle end cover.

In one embodiment, the reversible solenoid valve further comprises a pilot valve, and the step between installing the valve seat in the valve chamber and installing the valve core assembly in the valve chamber further comprises:

and fixing the pilot valve on the valve body.

So set up, because the pilot valve is the welding on the valve body, fix the pilot valve earlier, can protect spare parts such as sealing washer in the case subassembly to avoid welding high temperature to influence.

In one embodiment, the intermediate end cover includes a guide sleeve and a cover body, a sealing groove is formed in the guide sleeve, and the step of fixedly connecting the intermediate end cover and the valve body includes:

welding the cover body on the inner wall of the valve body;

arranging a sealing ring in the sealing groove;

and extending the guide sleeve into the valve cavity and fixedly connecting the guide sleeve with the cover body.

So set up, weld the lid earlier, be connected uide bushing and lid again for spare parts such as sealing washer can be connected with the lid after the valve body outside is assembled with the uide bushing again, make things convenient for the installation of sealing washer, also protect the sealing washer to avoid welding high temperature's influence.

Compared with the prior art, the reversible electromagnetic valve provided by the invention has the advantages that the middle end cover is fixedly arranged in the valve body, the cavity can be isolated by the middle end cover, one piston component can be omitted, and the installation steps are simplified.

Drawings

Fig. 1 is a sectional view of a reversible solenoid valve provided in the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a cross-sectional view of the reversible solenoid valve with the linkage assembly installed;

FIG. 4 is a schematic structural diagram of the reversible solenoid valve without a pilot valve and an end cover;

FIG. 5 is an overall perspective view of the reversible solenoid valve;

FIG. 6 is a cross-sectional view of the intermediate end cap;

FIG. 7 is a schematic view of the structure of the connecting rod and the guide frame;

fig. 8 is a process diagram of the assembly of the reversible solenoid valve.

The symbols in the drawings represent the following meanings:

100. a reversible solenoid valve; 10. a valve body; 101. a first hole; 102. a second hole; 103. a first capillary tube; 104. a second capillary tube; 11. a valve cavity; 110. an opening; 111. a first chamber; 112. a second chamber; 113. a third chamber; 12. a first communication port; 121. a first connecting pipe; 13. a second communication port; 131. a second connecting pipe; 140. an end cap; 14. a first end cap; 15. a second end cap; 16. a middle end cap; 161. mounting holes; 162. a sealing groove; 163. a seal ring; 164. a cover body; 165. a guide sleeve; 166. a solder bath; 17. a valve seat; 20. a valve core assembly; 21. a connecting rod; 22. a piston member; 221. an intermediate baffle; 222. a first part; 2221. a first baffle plate; 2222. a first piston bowl; 223. a second section; 2231. a second baffle; 2232. a second piston bowl; 23. a slider member; 231. a first slider; 2311. a first stage; 2312. a second stage; 232. a second slider; 233. a guide frame; 2331. a through hole; 30. a pilot valve; 31. a third capillary tube; 32. a fourth capillary.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 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 in the description of the invention herein 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 to 8, the present invention provides an assembling method of a reversible solenoid valve 100 for assembling a reversible solenoid valve 100.

The reversible solenoid valve 100 (hereinafter referred to as a solenoid valve) is installed in an air conditioning unit and used for controlling the connection or disconnection of a pipeline. The reversible solenoid valve 100 can be used in an air conditioning unit requiring bidirectional operation, and for example, can be installed in an air conditioning unit requiring both functions of a cooling mode and a heating mode, so as to realize bidirectional flow of a medium without switching a pipeline.

Referring to fig. 1, the solenoid valve includes a valve body 10, an intermediate end cover 16 and a valve core assembly 20, the valve body 10 has a valve cavity 11, the valve body 10 is provided with a first communicating opening 12 and a second communicating opening 13 which are oppositely arranged, the intermediate end cover 16 is disposed in the valve cavity 11, and the valve core assembly 20 is disposed in the valve cavity 11 and can slide in the valve cavity 11 to separate the first communicating opening 12 from the second communicating opening 13.

Specifically, a first connecting pipe 121 is arranged in the first communication port 12, a second connecting pipe 131 is arranged in the second communication port 13, and the first connecting pipe 121 and the second connecting pipe 131 are respectively connected with a pipeline of the air conditioning unit.

The two ends of the valve body 10 are provided with openings 110, the two ends of the valve body 10 are provided with end covers 140, each end cover 140 comprises a first end cover 14 and a second end cover 15, the first end cover 14 is arranged at one end of the valve body 10 close to the first communication port 12 and the second communication port 13, and the second end cover 15 0 is arranged at the other end of the valve body 10.

The valve cavity 11 is provided with a valve seat 17, the valve seat 17 is fixed in the valve body 10, the first communication port 12 and the second communication port 13 penetrate through the valve seat 17, and a part of the valve core assembly 20 is arranged in the valve seat 17 and slides in the valve seat 17.

The valve cavity 11 includes a first cavity 111, a second cavity 112 and a third cavity 113, the first end cap 14, the valve body 10 and the valve core assembly 20 cooperate to form the first cavity 111, the valve core assembly 20, the middle end cap 16 and the valve body 10 form the second cavity 112, and the valve core assembly 20, the valve body 10 and the second end cap 15 form the third cavity 113. The first communication port 12 and the second communication port 13 extend into the first chamber 111, respectively, and when the reversible solenoid valve 100 is in the first position, the first communication port 12 and the second communication port 13 communicate with the first chamber 111 for the flow of the medium.

The valve body 10 is provided with a first hole 101 and a second hole 102, the first hole 101 is communicated with the second cavity 112, and the second hole 102 is communicated with the third cavity 113. A first capillary 103 is arranged in the first hole 101, a second capillary 104 is arranged in the second hole 102, and the first capillary 103 and the second capillary 104 are connected to a pilot valve 30 described below, so that a pressure difference is formed between two sides of the valve core assembly 20 to push the valve core assembly 20 to move.

Referring to fig. 6, the middle end cover 16 is provided with a mounting hole 161, a portion of the valve core assembly 20 is disposed in the mounting hole 161, a portion of the valve core assembly is disposed on a side of the middle end cover 16 close to the first communication port 12 and the second communication port 13, and another portion of the valve core assembly is disposed on a side of the middle end cover 16 away from the first communication port 12 and the second communication port 13.

The outer side wall of the middle cover 16 is opened with a solder groove 166, and when the middle cover 16 is soldered to the inner wall of the valve body 10, a solder ring or solder is placed in the solder groove 166.

A sealing groove 162 is formed in the inner wall of the mounting hole 161, a sealing ring 163 is disposed in the sealing groove 162, and the sealing ring 163 abuts against the valve core assembly 20 penetrating through the mounting hole 161, so that the valve core assembly 20 is sealingly penetrating through the mounting hole 161.

The middle end cover 16 includes a cover body 164 and a guide sleeve 165, the mounting hole 161 is opened in the guide sleeve 165, the cover body 164 is sleeved outside the guide sleeve 165 and is welded and fixed with the inner wall of the valve body 10, and the cover body 164 is fixedly connected with the guide sleeve 165. The cover 164 and the guide sleeve 165 may be connected by rivets or screws.

Referring to fig. 1, the valve core assembly 20 includes a connecting rod 21 and a piston member 22, the connecting rod 21 is disposed in the mounting hole 161, the piston member 22 is disposed in the valve cavity 11, the piston member 22 can move along the inner wall of the valve body 10 in a sealing manner, and the piston member 22 is located between the second cavity 112 and the third cavity 113, that is, the piston member 22 separates the second cavity 112 and the third cavity 113 to prevent the media from streaming. When the electromagnetic valve needs to be closed, high-pressure medium enters the third cavity 113 from the second capillary 104, and medium in the second cavity 112 flows out from the first capillary 103, so that the piston part 22 is pushed to move towards the direction close to the valve seat 17; when the solenoid valve needs to be opened, high-pressure medium enters the second cavity 112 from the first capillary 103, and medium in the third cavity 113 flows out from the second capillary 104, so that the piston is pushed to move in a direction away from the valve seat 17.

The piston member 22 includes an intermediate baffle 221, a first portion 222, and a second portion 223, the intermediate baffle 221, the first portion 222, and the second portion 223 being connected to each other, the first portion 222 being disposed toward the first end cap 14, and the second portion 223 being disposed toward the second end cap 15.

First portion 222 includes first baffle 2221 and the first piston bowl 2222 that is the bowl shape, second portion 223 includes second baffle 2231 and the second piston bowl 2232 that is the bowl shape, first baffle 2221 is located in first piston bowl 2222, second baffle 2231 is located in second piston bowl 2232, both sides of middle baffle 221 are located respectively to first piston bowl 2222 and second piston bowl 2232, first baffle 2221, first piston bowl 2222, middle baffle 221, second piston bowl 2232, second baffle 2231 connects gradually. The first piston bowl 2222 and the second piston bowl 2232 are disposed opposite to each other, and outer sidewalls of the first piston bowl 2222 and the second piston bowl 2232 are attached to an inner wall of the valve body 10, so that the piston member 22 moves in the valve body 10 in a sealing manner, so as to seal the second chamber 112 from the third chamber 113.

The valve core assembly 20 further includes a slider member 23, the slider member 23 is connected to one end of the connecting rod 21 away from the piston member 22, and the slider member 23 can block or unblock the first communication port 12 and the second communication port 13 with the movement of the piston member 22.

Referring to fig. 7, the slider member 23 includes a first slider 231, a second slider 232 and a guide frame 233, the guide frame 233 is provided with a through hole 2331, a portion of the first slider 231 and a portion of the second slider 232 are disposed in the through hole 2331, the guide frame 233 is used for mounting and limiting the first slider 231 and the second slider 232, and the guide frame 233 is connected to the connecting rod 21.

Each of the first slider 231 and the second slider 232 includes a first segment 2311 and a second segment 2312, the first segment 2311 of the first slider 231 is disposed near the first communication port 12, and the first segment 2311 of the second slider 232 is disposed near the second communication port 13. The outer diameter of the first section 2311 is greater than the outer diameter of the second section 2312, the outer diameter of the second section 2312 of the first slider 231 is less than the outer diameter of the second section 2312 of the second slider 232, and the second section 2312 of the first slider 231 is sleeved on the outer side of the second section 2312 of the second slider 232. The guide frame 233 is provided outside the second section 2312.

Referring to fig. 4 and 5, the solenoid valve further includes a pilot valve 30, and the pilot valve 30 is disposed outside the valve body 10 and connected to the first capillary 103 and the second capillary 104. By reversing the pilot valve 30, the pressure difference across the piston member 22 is controlled, thereby pushing the piston member 22.

The pilot valve 30 is provided with a third capillary tube 31 and a fourth capillary tube 32, one end of the third capillary tube 31 is connected to the pilot valve 30, the other end is connected to the high-pressure pipeline of the air conditioning unit, one end of the fourth capillary tube 32 is connected to the pilot valve 30, and the other end is connected to the low-pressure pipeline of the air conditioning unit.

Referring to fig. 8, the assembling method of the reversible solenoid valve 100 includes:

s1, installing the middle end cover 16 into the valve cavity 11 from the opening 110 of the valve body 10, and fixedly connecting the middle end cover with the valve body 10;

s2, the valve seat 17 is arranged in the valve cavity 11 and fixed on the inner wall of the valve body 10;

s3, the valve core assembly 20 is installed in the valve cavity 11, and the valve core assembly 20 is in sliding connection with the valve seat 17;

s4, the first end cap 14 and the second end cap 15 are respectively disposed at two ends of the valve body 10 to seal the opening 110.

The invention can reduce the assembly steps by fixing the middle end cover 16 in the valve body 10 and separating the chambers by the middle end cover 16, thereby reducing the number of the piston parts 22.

In step S1, by inserting the intermediate cover 16 from the opening 110 near the one end of the first communication port 12 and the second communication port 13, the inner wall of the valve body 10 near the second cover 15 can be protected from scratches, and the piston member 22 can slide smoothly and hermetically on the inner wall of that portion of the valve body 10.

In step S1, the intermediate end cap 16 is fixed in the valve chamber 11 by welding, so that the firmness of the intermediate end cap 16 can be enhanced.

The steps before step S1 further include:

s11, welding the cover 164 in the valve cavity 11;

s12, the seal ring 163 is disposed in the seal groove 162;

s13, extending the guide sleeve 165 provided with the sealing ring 163 into the valve cavity 11 and arranging the guide sleeve in the cover body 164;

s14 fixedly connecting the guide sleeve 165 with the cover 164.

It can be understood that the cover body 164 is welded first, and then the guide sleeve 165 with the sealing ring 163 is fixedly connected with the cover body 164, so that the sealing ring 163 and other parts which are not high in temperature can be protected from being influenced by high-temperature heat during welding.

In S14, the guide sleeve 165 and the cover 164 are fixedly connected by rivets or screws, so that the seal ring 163 can be protected when the guide sleeve 165 and the cover 164 are fixed.

In S2, the valve seat 17 is fixed by welding in the valve body 10.

The step S3 comprises the following steps:

s31 connecting the slider member 23 with the link 21;

s32, the connecting rod 21 and the slider member 23 are inserted into the valve chamber 11 from the valve body 10 near the opening 110 of the first communicating port 12 and the second communicating port 13, the connecting rod 21 is inserted into the mounting hole 161, and the slider member 23 is pushed into the valve seat 17;

s33 the piston member 22 is inserted into the valve chamber 11 from the opening 110 at the end of the valve body 10 remote from the first communication port 12 and the second communication port 13, and is connected to the connecting rod 21.

In step S31, the slider member 23 and the link 21 are fixedly connected by a rivet, a screw, or the like.

In step S31, the assembling method of the slider member 23 includes:

s311, disposing the first segment 2311 of the first slider 231 outside the through hole 2331, and extending the second segment 2312 of the first slider 231 into the through hole 2331;

s312, the first section 2311 of the second slider 232 is disposed at a side of the through hole 2331 away from the first section 2311 of the first slider 231, and the second section 2312 of the second slider 232 is extended into the second section 2312 of the first slider 231;

s313 connects the guide frame 233 with the link 21.

In step S33, the method of mounting the piston member 22 includes:

s331 places the first portion 222 and the second portion 223 on both sides of the middle barrier 221, and fixedly connects them.

Step S331 includes:

s3311, placing a first piston bowl 2222 and a second piston bowl 2232 on two sides of the middle baffle 221 opposite to each other;

s3312 positions the first baffle 2221 in the first piston bowl 2222 and the second baffle 2231 in the second piston bowl 2232.

After step S2, the steps before step S3 further include:

s5 fixes the pilot valve 30 to the valve body 10.

In S5, the pilot valve 30 is fixed to the valve body 10 by welding.

Since the first piston bowl 2222, the second piston bowl 2232 and the sliding block in the valve core assembly 20 are made of plastic materials, the step of welding the pilot valve 30 is disposed before the valve core assembly 20 is installed, so as to protect the valve core assembly 20 from the high-temperature environment of welding.

After step S5, the steps before step S3 further include:

s6 welds one end of the first capillary tube 103 and the second capillary tube 104 to the pilot valve 30, welds the other end to the valve body 10, and welds one end of the third capillary tube 31 and the fourth capillary tube 32 to the pilot valve 30.

In the assembling process, firstly, the middle end cover 16 extends into the valve cavity 11 from the opening 110 close to the first communication opening 12 and is fixed in the valve body 10, the valve seat 17 is fixed in the valve body 10, the assembled slider component 23 is connected to the connecting rod 21 and then is arranged in the valve cavity 11, the connecting rod 21 penetrates through the mounting hole 161 and extends between the middle end cover 16 and the end cover 140 of the second end cover 15, and the piston component 22 is connected to one end of the connecting rod 21 far away from the slider component 23; the pilot valve 30 is further fixed to the valve body 10, and the first end cap 14 and the second end cap 15 are further disposed at both ends of the valve body 10 to close the opening 110.

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

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method for assembling a reversible electromagnetic valve, the reversible electromagnetic valve comprises a valve body (10), an intermediate end cover (16), a valve core assembly (20), a valve seat (17) and an end cover (140), wherein the valve body (10) is provided with a valve cavity (11) with two ends opened (110); the assembling method of the reversible electromagnetic valve is characterized by comprising the following steps:

the middle end cover (16) is installed into the valve cavity (11) from the opening (110) and is fixedly connected with the valve body (10);

the valve seat (17) is arranged in the valve cavity (11) and fixed on the inner wall of the valve body (10);

the valve core assembly (20) is installed in the valve cavity (11), and the valve core assembly (20) is connected with the valve seat (17) in a sliding mode;

and covering the end covers (140) at two ends of the valve body (10) and sealing the opening (110).

2. The assembly method of a reversible electromagnetic valve according to claim 1, characterized in that the valve body (10) is provided with a first communication port (12) and a second communication port (13), and in the step of installing the intermediate end cap (16) into the valve chamber (11) from the opening (110):

the intermediate end cover (16) is installed in the valve cavity (11) from an opening (110) of one end of the valve body (10) close to the first communication port (12) and the second communication port (13).

3. The assembly method of the reversible electromagnetic valve according to claim 2, characterized in that the valve core assembly (20) comprises a connecting rod (21), a piston member (22) and a slider member (23), the end cover (140) of the middle end cover (16) is provided with a mounting hole (161), and the step of installing the valve core assembly (20) into the valve cavity (11) comprises:

connecting the slider member (23) to one end of the link (21);

the connecting rod (21) and the sliding block component (23) are installed in the valve cavity (11) from an opening (110) of one end, close to the first communication opening (12) and the second communication opening (13), of the valve body (10), the connecting rod (21) extends into the installation hole (161), and the sliding block component (23) is pushed into the valve seat (17);

-connecting the piston member (22) to an end of the connecting rod (21) remote from the slider member (23).

4. The assembling method of a reversible solenoid valve according to claim 3, wherein said slider member (23) comprises a guide frame (233), a first slider (231) and a second slider (232), said guide frame (233) is provided with a through hole (2331), said first slider (231) and said second slider (232) each comprise a first section (2311) and a second section (2312), said assembling method of said slider member (23) comprises:

arranging a first section (2311) of the first slider (231) outside the through hole (2331), and extending a second section (2312) of the first slider (231) into the through hole (2331);

arranging the first section (2311) of the second slider (232) at one side of the through hole (2331) far away from the first section (2311) of the first slider (231), and extending the second section (2312) of the second slider (232) into the second section (2312) of the first slider (231);

connecting the guide frame (233) with the connecting rod (21).

5. The assembly method of a reversible solenoid valve according to claim 3, characterized in that said piston member (22) comprises an intermediate baffle (221), a first portion (222) and a second portion (223), said assembly method of a piston member (22) comprising:

the first portion (222) and the second portion (223) are respectively placed on both sides of the intermediate barrier (221) and fixedly connected.

6. The method of assembling a reversible solenoid valve according to claim 5, characterized in that said first portion (222) comprises a first baffle plate (2221) and a first piston bowl (2222) having a bowl shape, said second portion (223) comprises a second baffle plate (2231) and a second piston bowl (2232) having a bowl shape, and the step of fixedly connecting said first portion (222), said intermediate baffle plate (221), and said second portion (223) further comprises:

placing the first piston bowl (2222) and the second piston bowl (2232) on opposite sides of the intermediate baffle plate (221);

disposing the first baffle plate (2221) within the first piston bowl (2222) and disposing the second baffle plate (2231) within the second piston bowl (2232).

7. Method for assembling a reversible solenoid valve according to claim 1, characterized in that said intermediate end cap (16) is fixed to said valve body (10) by means of a welded connection.

8. The assembly method of the reversible solenoid valve according to claim 1, characterized in that the outer side wall of the intermediate end cap (16) is provided with a solder groove (166), and before the intermediate end cap (16) is welded with the valve body (10), a solder or a solder ring is placed in the solder groove (166).

9. The method of assembling a reversible solenoid valve according to claim 1, further comprising a pilot valve (30), the step between the step of installing the valve seat (17) into the valve chamber (11) and the step of installing the spool assembly (20) into the valve chamber (11) further comprising:

the pilot valve (30) is fixed on the valve body (10).

10. The assembly method of the reversible electromagnetic valve according to claim 1, characterized in that the intermediate end cap (16) comprises a guide sleeve (165) and a cover body (164), a sealing groove (162) is formed in the guide sleeve (165), and the step of fixedly connecting the intermediate end cap (16) and the valve body (10) comprises:

welding the cover body (164) to the inner wall of the valve body (10);

disposing a seal ring (163) within the seal groove (162);

and the guide sleeve (165) extends into the valve cavity (11) and is fixedly connected with the cover body (164).