CN114838183B

CN114838183B - Electromagnetic reversing valve

Info

Publication number: CN114838183B
Application number: CN202110137340.9A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2023-09-19
Anticipated expiration: 2041-02-01
Also published as: CN114838183A; WO2022161456A1

Abstract

The invention provides an electromagnetic reversing valve, which comprises a valve body part, wherein the valve body part comprises a valve body main body part, a first sleeve part and a second sleeve part, the first sleeve part is fixedly connected with the valve body main body part, and the second sleeve part is fixedly connected with the valve body main body part; the valve body main part still includes platy portion and surrounding part, platy portion with surrounding part fixed connection or as an organic whole machine-shaping structure, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of first sleeve portion, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of second sleeve portion, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of first sleeve portion encloses, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of second sleeve portion encloses, can relatively reduce the manufacturing cost of valve body.

Description

Electromagnetic reversing valve

Technical Field

The invention relates to the technical field of refrigeration control, in particular to an electromagnetic reversing valve.

Background

Electromagnetic four-way reversing valves are widely used in refrigeration systems for switching between cooling and heating, and are shown in fig. 1, which is a structural view of a typical electromagnetic reversing valve, and as shown in the drawing, a conventional electromagnetic four-way valve can be generally used in refrigeration systems such as air conditioning systems, and comprises a main valve 10 'and a pilot valve 20'; the main valve 10 'comprises a valve body 11'. The valve body 11' is generally cylindrical, a D interface is formed on the peripheral wall of the valve body for connecting an exhaust pipe D, a valve seat 13' is fixedly connected to one side peripheral wall opposite to the D interface, and 3 holes are formed in the valve seat 13' for fixedly connecting the connecting pipe E, the air suction pipe S and the connecting pipe C. Since the cross section of the valve body 11' is circular, the valve seat 13' is provided with an arc surface matched with the inner wall of the main valve body, namely, the longitudinal section of the valve seat 13' is approximately D-shaped, and the valve seat are fixed by welding.

The valve body 11' is connected with an exhaust pipe D (connected with a high-pressure area) connected with an exhaust port of the compressor, an air suction pipe S (connected with a low-pressure area) connected with an air suction port of the compressor, a connecting pipe E connected with the indoor heat exchanger 30', and a connecting pipe C connected with the outdoor heat exchanger 40 '; the two ends of the valve body 11 'are provided with end covers 12', the inside is fixedly provided with a valve seat 13', a sliding block 15' driven by a connecting rod 14 'and a piston 16' are also arranged, the valve seat 13 'contacts and supports the sliding block 15' to form a pair of kinematic pairs, and the piston 16 'and the valve body 11' form a pair of kinematic pairs.

The small valve body of the pilot valve 20' is fixedly provided with a capillary tube D connected with the exhaust pipe D of the main valve 10', namely the inner cavity of the pilot valve 20' is correspondingly communicated with the high-pressure area of the main valve; the small valve seat of the pilot valve 20' is provided with three valve ports, and a capillary e, a capillary S and a capillary c which are respectively and fixedly connected with the left end cover of the main valve 10', the air suction pipe S and the right end cover of the main valve 10' are respectively arranged left to right; a sleeve is fixed at the right end of the small valve body of the pilot valve 20', and an electromagnetic coil 50' is arranged at the outer side of the sleeve.

In a working state, when the refrigerating system needs refrigeration, the electromagnetic coil 50 'is not electrified, the core iron in the inner cavity of the pilot valve 20' drives the sliding bowl to be positioned at the left side under the action of the restoring spring force, so that the capillary E is communicated with the capillary S, the capillary C is communicated with the capillary D, the left cavity of the main valve 10 'is a low-pressure area, the right cavity is a high-pressure area, the pressure difference force formed between the left cavity and the right cavity of the main valve 10' pushes the sliding block 15 'and the piston 16' to the left side, the connecting pipe E is communicated with the air suction pipe S, the air discharge pipe D is communicated with the connecting pipe C, and at the moment, the circulation path of the refrigerant in the refrigerating system is as follows: compressor exhaust port- & gt exhaust pipe D- & gt valve cavity of valve body 11- & gt connection pipe C- & gt outdoor heat exchanger 40 '& gt throttle element 60' & gt indoor heat exchanger 30 '& gt connection pipe E- & gt inner cavity of slide block 15' & gt air suction pipe S- & gt compressor air suction port, and refrigerating system is in refrigeration working state;

When the refrigerating system needs to be heated, the electromagnetic coil 50 'is electrified, the core iron in the inner cavity of the pilot valve 20' overcomes the acting force of the return spring to drive the sliding bowl to move right, so that the capillary tube C is communicated with the capillary tube S, the capillary tube E is communicated with the capillary tube D, the left cavity of the main valve 10 'is a high-pressure area, the right cavity is a low-pressure area, a pressure difference is formed between the left cavity and the right cavity of the main valve 10', the sliding block 15 'and the piston 16' are pushed to the right side, the connecting pipe C is communicated with the air suction pipe S, the air discharge pipe D is communicated with the connecting pipe E, and at the moment, the circulation path of a refrigerant in the refrigerating system is as follows: compressor exhaust port- & gt exhaust pipe D- & gt valve cavity of valve body 11- & gt take over E- & gt indoor heat exchanger 30 '& gt throttling element 60' & gt outdoor heat exchanger 40 '& gt take over C- & gt inner cavity of slide block 15' & gt air suction pipe S- & gt compressor air suction port, and the refrigerating system is in a heating working state.

As described above, the main valve 10' is reversed by the combined action of the pilot valve 20' and the solenoid 50', and the like, so that the flow direction of the refrigerant is switched, and the switching between the heating operation state and the cooling operation state of the refrigeration system is realized.

Disclosure of Invention

The application mainly aims to provide an electromagnetic reversing valve with a novel structure, which can relatively reduce the manufacturing cost of a valve body part.

The application provides an electromagnetic reversing valve, which comprises a valve body part, wherein the valve body part comprises a valve body main body part, a first sleeve part and a second sleeve part, the first sleeve part and the second sleeve part are positioned on different sides of the valve body main body part, the first sleeve part is fixedly connected with the valve body main body part, the second sleeve part is fixedly connected with the valve body main body part, at least part of the first sleeve part is of a cylindrical structure, and at least part of the second sleeve part is of a cylindrical structure;

The valve body main part still includes platy portion and surrounding part, platy portion with surrounding part fixed connection or integrated into one piece structure, the surrounding part is equipped with first connecting port portion, platy portion is equipped with two at least second connecting port portions, along the X-X' direction of electromagnetic reversing valve, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of first sleeve portion, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of second sleeve portion, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of first sleeve portion encloses, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of second sleeve portion encloses.

The electromagnetic reversing valve comprises a valve body main body part, a first sleeve part and a second sleeve part, wherein the first sleeve part and the second sleeve part are positioned at different sides of the valve body main body part, the first sleeve part is fixedly connected with the valve body main body part, the second sleeve part is fixedly connected with the valve body main body part, the valve body main body part comprises a plate-shaped part and a surrounding part, and the plate-shaped part is fixedly connected with the surrounding part or is of an integral processing and forming structure, so that the processing of the valve body main body part is facilitated, and the manufacturing cost of the valve body part can be relatively reduced.

Drawings

FIG. 1 is a schematic diagram of a typical four-way valve according to the background art;

fig. 2 is a schematic perspective view of an electromagnetic directional valve according to the present application;

fig. 3 is a schematic perspective view of a side view angle of an electromagnetic directional valve provided by the application;

FIG. 4 is a schematic cross-sectional view of a valve body portion and a slider of a first embodiment of an electromagnetic directional valve according to the present application;

fig. 5 is a left side view schematically showing a structure of a valve body main body and a slider in cooperation with each other in a first embodiment of an electromagnetic directional valve according to the present application; the right side view is a schematic perspective view of the left side view from the side view;

FIG. 6 is a sheet metal part forming the body portion of the valve body of the first embodiment of the electromagnetic directional valve provided by the present application;

FIG. 7 is a view showing a structure of a valve body main body portion of a first embodiment of an electromagnetic directional valve according to the present application;

fig. 8 is another structure of the valve body main body of the first embodiment of the electromagnetic directional valve provided by the present application;

fig. 9 is a cross-sectional view showing an overall structure of an electromagnetic directional valve to which the valve body main body structure of the first embodiment is applied;

fig. 10 is a schematic perspective view of a first connection seat of the electromagnetic directional valve of fig. 9;

Fig. 11 is a cross-sectional view of another overall structure of an electromagnetic directional valve to which the valve body main body structure of the first embodiment is applied;

fig. 12 is a schematic perspective view of a first connection seat of the electromagnetic directional valve of fig. 11;

fig. 13 is a schematic perspective view of a valve body according to a second embodiment of the electromagnetic directional valve according to the present application;

fig. 14 is a schematic view showing a plate-like portion of the valve body of fig. 13 in a three-dimensional configuration;

FIG. 15 is a left side view of the valve body of FIG. 13 mated with a slider; the right side view is a side view three-dimensional structure schematic diagram of the left side view;

FIG. 16 is a schematic cross-sectional view of a valve body portion and a slider of a third embodiment of an electromagnetic directional valve provided by the present application;

FIG. 17 is a perspective view of a valve seat portion of the valve body of FIG. 16;

fig. 18 is a schematic perspective view of a valve body according to a fourth embodiment of the electromagnetic directional valve according to the present application;

FIG. 19 is a perspective view of a valve seat portion of the valve body of FIG. 18;

FIG. 20 is a schematic cross-sectional view of a valve body portion mated with a slider of a fourth embodiment of an electromagnetic directional valve provided by the present application;

FIG. 21 is a schematic perspective view of the valve body of FIG. 20 in a side view mated with a slider;

FIG. 22 is a schematic diagram of the steps in assembling a piston assembly and valve body of a typical electromagnetic directional valve structure of the prior art;

FIG. 23 is an exploded view of an electromagnetic directional valve structure according to the method of installing an electromagnetic directional valve of the present application;

FIG. 24 is a left side view of a cross-sectional view of a valve body portion of a first embodiment of a method of installing an electromagnetic directional valve provided by the present application; the right side view is a schematic perspective view of a valve body main body part of a first embodiment of the installation method of the electromagnetic directional valve provided by the application;

FIG. 25 is a schematic view showing the valve body of FIG. 24 after being fixedly mounted to a nipple;

FIG. 26 is a schematic perspective view of a piston and connecting rod assembly; the lower diagram is a schematic diagram of the state of the components of the valve body main body with the pipe connecting structure after the piston connecting rod assembly is installed;

FIG. 27 is a cross-sectional view of the lower valve body portion with the union structure of FIG. 26 with the piston rod assembly installed;

FIG. 28 is an exploded view of the electromagnetic directional valve provided by the present application prior to assembly of the first piston member and rivet;

fig. 29 is a side view, a cross-sectional view and a schematic perspective view of a first connection seat of the electromagnetic directional valve provided by the application in sequence on the left side; the right side is a side view, a cross-sectional view and a perspective view of the second connecting seat in sequence;

FIG. 30 is a schematic perspective view of the valve body portion with adapter of FIG. 26 assembled with the piston rod assembly and with the first sleeve portion installed; the right side is a schematic cross-sectional view of the left drawing;

fig. 31 is a perspective view of the left side of fig. 30 with a second sleeve portion installed; the right side is a schematic cross-sectional view of the left side;

fig. 32 is a schematic view of a state after the first sleeve portion and the first connecting seat of the electromagnetic directional valve provided by the present application are assembled;

FIG. 33 is an exploded view of FIG. 31;

FIG. 34 is a schematic view of the components of the electromagnetic directional valve provided by the application after the connection pipe and the valve body are assembled; the right side view is a schematic view of the left side view in a state in which the first sleeve portion is mounted;

FIG. 35 is a left side view of a piston and connecting rod assembly provided by the present application; the right side view is a schematic view of the right side view of FIG. 34, showing the components of the piston rod assembly mounted thereto

[ detailed description ] of the application

It should be noted that the present application mainly performs key protection for the valve body main body part, the first sleeve part and the second sleeve part of the electromagnetic directional valve, and the structure characteristics of the valve body parts and the respective connection and coordination relations, and as for the number of other interface parts, the connection pipe structure, the sliding block structure, etc., additional adaptability improvement can be made according to the requirements of customers or refrigeration systems.

In order to better understand the detailed technical solution of the electromagnetic directional valve structure provided by the present application in detail, a first embodiment provided by the present application is described in detail below with reference to the accompanying drawings, referring to fig. 2 and 3, fig. 2 is a schematic perspective view of the electromagnetic directional valve provided by the present application, fig. 3 is a schematic side perspective view of fig. 2, the electromagnetic directional valve includes a valve body portion including a valve body main body 10, a first sleeve portion 40 and a second sleeve portion 50, the first sleeve portion 40 and the second sleeve portion 50 are located at different sides of the valve body main body 10, the first sleeve portion 40 is fixedly connected with the valve body main body 10, the second sleeve portion 50 is fixedly connected with the valve body main body portion 10, at least part of the first sleeve portion 40 is in a cylindrical structure, at least part of the second sleeve portion 50 is in a cylindrical structure, the valve body main body portion further includes a plate portion 11 and a surrounding portion 12, the plate-shaped part 11 is fixedly connected with the surrounding part 12 or is in an integral processing and forming structure, the surrounding part 12 is provided with a first connecting opening part, the plate-shaped part 11 is provided with at least two second connecting opening parts, the plate-shaped part 11 is positioned at the bottom of the valve body main part along the X-X' direction of the electromagnetic reversing valve, the surrounding part 12 is arranged around the plate-shaped part 11, the shape of the longitudinal section of the valve body main part 10 is different from the shape of the longitudinal section of the first sleeve part 40, the shape of the longitudinal section of the valve body main part 10 is different from the shape of the longitudinal section of the second sleeve part 50, the area surrounded by the maximum longitudinal section of the valve body main part is larger than the area surrounded by the longitudinal section of the first sleeve part 40, the area surrounded by the maximum longitudinal section of the valve body main part is larger than the area surrounded by the longitudinal section of the second sleeve part 50, and through improvement of the electromagnetic reversing valve structure comprises the valve body main part, the valve body part of the electromagnetic reversing valve structure of the prior art adopts a cylindrical structure, and is matched with a D-shaped valve seat part by adopting a curved surface structure, the valve body main body part comprises a plate-shaped part and a surrounding part, the plate-shaped part and the surrounding part are fixedly connected or integrally processed into a molded structure, the plate-shaped part can be in sliding fit with a sliding block, the valve body part is integrally convenient to process, in addition, the inner cavity of the valve body main body part 10 is relatively large, the valve body can be matched with a large-scale structure of a commercial refrigeration system, the two ends of the valve body main body part adopt the first sleeve part and the second sleeve part, the old-scale structure which is not matched with the first sleeve part and the second sleeve part can be kept unchanged, the sizes of the first sleeve part and the second sleeve part on the two sides can be flexibly adjusted, the connection with the valve body main body part 10 can be realized by adopting the smaller sizes, and the parts can be reduced, so that the whole valve body part structure is reduced.

The electromagnetic directional valve provided by the application can be a three-way electromagnetic directional valve structure or a five-way electromagnetic directional valve structure, in the embodiment, three interface parts are taken as an example to describe the four-way electromagnetic directional valve structure, referring to fig. 2-5, the valve body part 10 in the embodiment adopts a formed pipe fitting to integrally form, for example, stainless steel section bars can be adopted, in the embodiment, the valve body part adopts a square valve body part structure to describe, the valve body part comprises a plate-shaped part 11 and a surrounding part 12, the plate-shaped part 11 and the surrounding part 12 are integrally processed and formed, the plate-shaped part 11 is positioned at the bottom of the valve body part 10 along the X-X 'direction of the electromagnetic directional valve to form the bottom wall of the valve body part, the surrounding part 12 is arranged around the plate-shaped part 11 as a reference plane, the second interface part comprises three connecting opening parts, the plate-shaped part 11 is provided with an E connection opening, an S connection opening and a C connection opening, the surrounding part 12 is provided with a first connection opening, namely a D connection opening, the E connection opening, the S connection opening and the C connection opening can be arranged in parallel, the D connection opening can be arranged opposite to the E connection opening, the S connection opening and the C connection opening, the plate-shaped part 11 comprises a first flanging part 111, a second flanging part 112 and a third flanging part 113, the first flanging part 111, the second flanging part 112 and the third flanging part 113 are downwards flanging molded along the X-X' direction of the electromagnetic directional valve to respectively form the E connection opening, the S connection opening and the C connection opening, the valve body main body part also comprises a fourth flanging part 114, the fourth flanging part 114 upwards flanging is molded to correspondingly form the D connection opening, the electromagnetic directional valve also comprises a first connecting pipe and a second connecting pipe correspondingly, the first connecting pipe and the second connecting pipe can be made of stainless steel, the first connecting pipe corresponds to the D connecting opening, the second connecting pipe corresponds to the E/S/C connecting opening, the first connecting pipe is fixedly connected with the D connecting opening, the second connecting pipe is fixedly connected with the E/S/C connecting opening, the surrounding part 12 at least comprises a plate-shaped part structure, it is to be noted that according to the requirement of satisfying the fluid stress, the structure of the valve body main part 10 shown in figure 7 can also be used for arranging the top wall of the surrounding part 12 into a cambered surface structure with a certain radian so as to strengthen the stress effect of the valve body main part on the fluid, or the side walls on two sides of the surrounding part 12 can also be arranged into a cambered surface structure with a certain radian or other structures, for example, the valve body main part 10 can also be a D-shaped semicircular structure which is arranged in a surrounding way based on the plate-shaped part 11, the valve body part stated in this embodiment is illustrated by taking a square body structure as an example, the square body structure includes a cuboid, a cube, a trapezoid and other special-shaped structures, as shown in fig. 8, the valve body part 10 is in a trapezoid structure state, it should be noted that, in this embodiment, the valve body part 10 may be directly made of a section bar, or may be expanded by using a whole sheet material as shown in fig. 6, a D connection opening and an E/S/C connection opening are first punched, the end part of a folded wall after flanging and folding is welded and fixed with the plate-shaped part 11 by means of laser welding or the like, the whole valve body part provided in this embodiment may be integrally formed by the section bar, or folded by the sheet material and welded and formed, compared with the prior art, the valve body part is more convenient for processing the valve body main body part in the processing procedures of drawing a series of metal processing, polishing the roughness of the whole inner peripheral wall and the like of the blank body of the valve body, and the processing cost of products can be reduced by relatively reducing the procedures.

Compared with the prior art that the valve seat part of the D-shaped rod is matched with the curved surface part of the valve body, the valve seat part has smaller width than the inner diameter of the valve body due to limited curved surface space, the E/S/C connecting pipe has smaller diameter than the valve seat part, and the welding length is reduced due to the influence of the curved surface space after the E/S/C connecting pipe is enlarged, and the matching of the connecting pipe specification is limited.

Referring to fig. 9 to 12, the electromagnetic directional valve further includes a first sleeve portion 40 and a second sleeve portion 50, both of which may be made of stainless steel, the first sleeve portion 40 and the second sleeve portion 50 may be made of a stamping material, the first sleeve portion 40 is a cylindrical structure having one end with a closed structure and the other end with an opening, the second sleeve portion 50 is a cylindrical structure having one end with a closed structure and the other end with an opening, the first sleeve portion 40 and the second sleeve portion 50 are located at different sides of the valve body 10, longitudinal sections of the valve body are of a square structure along the X-X' direction of the electromagnetic directional valve, the longitudinal sections of the first sleeve portion 40 and the second sleeve portion 50 are circular, the shape of the longitudinal sections of the valve body is different from the shape of the first sleeve portion and the second sleeve portion, and no matter the integral structure of the valve body is other trapezoid, special-shaped or D-shaped semicircular structures, the shape of the longitudinal section of the valve body is different from that of the first sleeve part 40, the shape of the longitudinal section of the valve body is different from that of the longitudinal section of the first sleeve part 50, the first sleeve part 40 comprises a cylindrical first sleeve part body 40a, the second sleeve part 50 comprises a cylindrical second sleeve part body 50a, the electromagnetic directional valve also comprises a first connecting seat 20 and a second connecting seat 30, the shape of the first connecting seat 20 is matched with the square valve body 10, the shape of the second connecting seat 30 is matched with the square valve body 10, the first connecting seat 20 and the first sleeve part 40 can be integrally processed and molded, or the first connecting seat 20 can also be used as an independent part to be fixedly connected with the first sleeve part 40, the first connecting seat 20 can be fixedly connected with one side of the valve body main body 10 by means of laser welding and the like so as to realize the fixed connection of the first sleeve part 40 and the valve body main body 10; the second connecting seat 30 may be integrally formed with the second sleeve portion 50, or the second connecting seat 30 may be fixedly connected with the second sleeve portion 50 as a separate component, the second connecting seat 30 may be fixedly connected with the other side of the valve body portion by laser welding or the like, so as to achieve the fixed connection of the second sleeve portion 50 and the valve body portion, by the above arrangement, the valve body portion of the electromagnetic directional valve includes the valve body portion 10, the first sleeve portion 40 and the second sleeve portion 50, longitudinal sections are made in the X-X 'direction of the electromagnetic directional valve, the shape of the longitudinal section of the valve body portion 10 of the square body is different from the shape of the longitudinal section of the first sleeve portion 40, the shape of the longitudinal section of the valve body portion 10 of the square body is different from the shape of the longitudinal section of the second sleeve portion 50, and the area of the area enclosed by the longitudinal section of the valve body portion 10 is larger than the area enclosed by the longitudinal section of the first sleeve portion, the area of the area surrounded by the longitudinal section of the valve body main body 10 is larger than the area surrounded by the longitudinal section of the second sleeve part, and it is to be noted that the area surrounded by the longitudinal section stated in the present application refers to, for example, the valve body main body 10, after the valve body main body 10 is dissected along the longitudinal direction X-X', the area surrounded by the longitudinal section of the valve body main body 10 and the surrounding part 12 is included, by the above arrangement, the inner cavity of the valve body main body 10 in the square body structure is relatively large, in practical use, the large model of the commercial refrigeration system can be matched, while the first sleeve part and the second sleeve part are adopted at both ends, the smaller model structure can be matched, the sizes of the first sleeve part and the second sleeve part at both sides can be adjusted, can adopt less size to realize being connected with valve body main part 10, make the application model of electromagnetic reversing valve wider, make things convenient for the switching and the use of electromagnetic reversing valve and various different models, valve body main part overall length also can correspond the reduction.

Further, the first connecting seat 20 is in a substantially square plate structure, the shape of the first connecting seat 20 is matched with the valve body main body 10, the first connecting seat comprises a first connecting seat body 21 and a first matching part 22, the first body 21 is provided with a first pore canal part 211, the first pore canal part 211 penetrates through the first connecting seat body 21, the first pore canal part 211 is in a substantially cylindrical structure, the first pore canal part 211 is matched with the first sleeve part body 40a, part of the first sleeve part body 40a is positioned in the first pore canal part 211 and fixedly connected with the first pore canal part 211 by means of laser welding or the like, or the first sleeve part body 40a is press-fitted into the first pore canal part 211, the first matching part 22 protrudes outwards from the edge part of the first body 21 to form a sleeve, the inner peripheral wall of the first matching part 22 can be abutted against and welded and fixed with the outer peripheral wall of the valve body main body 10 close to one side of the first sleeve part 40, or the outer peripheral wall of the sleeve first matching part 22 can be abutted against and fixed with the inner peripheral wall of the valve body main body 10 close to one side of the first sleeve part 40 to fixedly connect the first sleeve part with the valve body main body fixedly; the second connecting seat 30 is in a substantially square plate structure, the shape of the second connecting seat 30 is matched with the valve body main body 10, the second connecting seat comprises a second connecting seat body 31 and a second matching part 32, the second connecting seat body 31 is provided with a second pore canal part 311, the second pore canal part 311 penetrates through the second connecting seat body 31, the second pore canal part 311 is in a substantially cylindrical structure, the shape of the second pore canal part 311 is matched with the second sleeve part body 50a, part of the second sleeve part body 50a is positioned in the second pore canal part 311 and is fixed with the second pore canal part 311 through laser welding, the second fitting portion 32 is press-fitted into the second hole portion 311, the second fitting portion 32 is extended and projected from the second connection seat body 31 toward the outer sleeve, the inner peripheral wall of the second fitting portion 32 abuts against and is welded to the outer peripheral wall of the valve body main body portion 10 on the side close to the second fitting portion 50, or the outer peripheral wall of the second fitting portion 32 abuts against and is welded to the inner peripheral wall of the valve body main body portion 10 on the side close to the second fitting portion 50, so that the second fitting portion is fixedly connected to the valve body main body portion.

The structure of the first connecting seat and the second connecting seat can be improved by the following structure, the first connecting seat 20' comprises a first connecting seat body 21' and a first bulge 22', a first duct part 211' is further arranged, the shape of the first connecting seat body 21' is matched with the main body part of the valve body, the first bulge 22' is relatively far away from the peripheral part of the first connecting seat body 21', the first bulge 22' is outwards turned and bulge relative to the first connecting seat body, the first duct part 211' penetrates through the first bulge 22' and the first connecting seat body 21', the second connecting seat 30' comprises a second connecting seat body 31' and a second bulge 32', a second duct part 311 is further arranged, the shape of the second connecting seat body 31' is matched with the valve body main body part, the second protruding part 32' is relatively far away from the peripheral part of the second connecting seat body II 1', the second protruding part 32' is outwards flanged and protruding relative to the second connecting seat body, the second hole channel part 311' penetrates through the second protruding part 32' and the second connecting seat body 31', part of the first sleeve part body 40a is positioned in the first hole channel part 211' and welded and fixed, and part of the second sleeve part body 50a is positioned in the second hole channel part 311' and welded and fixed, so that the first sleeve part is fixedly connected with the valve body main body part, and the second sleeve part is fixedly connected with the valve body main body part.

The first sleeve 40 may be formed with the first connecting seat 20 by pressing, etc., the second sleeve 50 may be formed with the second connecting seat 30 by pressing, etc., the first sleeve 40 and the first connecting seat 20 may be formed as an integral structure, the second sleeve and the second connecting seat may be formed as an integral structure, and the first sleeve may be fixedly connected to the valve body, and the second sleeve may be fixedly connected to the valve body.

Further, the first sleeve portion 40 further includes a first concave portion 41, the first concave portion 41 is formed by concave inward forming on the surface of the first sleeve portion body 40a, the first concave portion 41 is located between the first closing portion 42 and the first sleeve portion body 40a, the first concave portion 41 is provided with a first positioning portion 411, the second sleeve portion 50 further includes a second concave portion 51, the second concave portion 51 is formed by concave inward forming on the surface of the second sleeve portion body 50a, the second concave portion 51 is located between the second closing portion 52 and the second sleeve portion body 50a, the second concave portion 51 is provided with a second positioning portion 511, or the first sleeve portion 40 is provided with a first reducing portion 41', the first reducing portion 41' includes a first closing portion 42', the first sleeve portion 40a is closer to the second sleeve portion 50 than the first sleeve portion 41', the first reducing portion 41 'has a first positioning portion 411', the second sleeve portion 50 is provided with a second reducing portion 51', the second sleeve portion 51' is located between the second closing portion 52 and the second sleeve portion 50a, or the first sleeve portion 40 is provided with a first reducing portion 41 'and a first reducing portion 41' is closer to the second sleeve portion 41 'than the second sleeve portion 50, the first reducing portion 41' has a second reducing portion 51', the second reducing portion 51' is provided with a second reducing portion 51', the second reducing portion 51' is smaller than the first reducing portion 71 'and the first reducing portion 71' is smaller than the first reducing portion of the first reducing portion 50a diameter than the first reducing portion of the first sleeve portion 40a connecting rod portion, the first reducing portion 71 'is smaller than the first reducing portion 71b, the second reducing portion 71' is smaller than the diameter of the first reducing portion 71b is connecting rod portion 71b, the second reducing portion 71 is connecting the second connecting rod portion 71, the second reducing portion 71b is connecting the second portion 71b and the second connecting rod portion 71 b.

The electromagnetic directional valve is provided with a main valve cavity A, a first valve cavity B and a second valve cavity C, a first valve cavity B of the electromagnetic directional valve is approximately limited between a first sealing part 42 and a first piston component 72, a second valve cavity C of the electromagnetic directional valve is approximately limited between a second sealing part 52 and a second piston component 73, the main valve cavity A, the first valve cavity B and the second valve cavity C can be changed along with the movement of a connecting rod assembly and the position switching of a sliding block 80, the electromagnetic directional valve comprises two working states, when the electromagnetic directional valve is in the first working state, namely a refrigeration working mode is required by a refrigerating system, an electromagnetic coil of the electromagnetic directional valve does not conduct an electrifying mode, at the moment, the main valve cavity A is approximately limited by part of a first sleeve part 40, a valve body part 10, a first piston component 72 and a second piston component 73, the first valve cavity B on the left side of the main valve cavity A is in a low pressure area, the second valve cavity C on the right side of the main valve cavity A is in a high pressure area, the first valve cavity B and the second valve cavity C form a pressure difference force to push the sliding block 71 to move leftwards, the sliding block 71 drives the lower peripheral wall 80 to move leftwards, and the first piston component 11 is matched with the first piston component 41 a sliding part 41 a certain part which is matched with the first piston component 41 a sliding part which is positioned leftwards, or the first piston component 41 is positioned leftwards, and the first part is matched with the first part 41' 72 is positioned leftwards; when the electromagnetic reversing valve is in the second working state, that is, the refrigeration system needs to perform a heating operation mode, the electromagnetic coil of the electromagnetic reversing valve performs an energizing mode, at this time, the main valve cavity a is approximately limited by a part of the second sleeve part 50, the valve body main body part 10, the first piston part 72 and the second piston part 73, the first valve cavity B on the left side of the main valve cavity a is in a high pressure area, the second valve cavity C on the right side of the main valve cavity a is in a low pressure area, the first valve cavity B and the second valve cavity C form a differential pressure force, the pushing connecting rod 71 moves rightward, the sliding block 80 and the plate-shaped part 11 perform sliding fit rightward under the driving of the connecting rod 71, the sliding fit of the second piston part 73 and the inner peripheral wall of the second sleeve part body 50a also performs rightward motion until the second piston part 73 and the second positioning part 511 of the second concave part 51 or the second piston part 73 and the second positioning part 511 'of the second reducing part 51', in the present embodiment, the slider 80 of the electromagnetic directional valve is directly in sliding fit with the plate-shaped portion 11, and it should be noted that, in the first operating state or the second operating state, the slider 80 is located substantially in the valve body main body portion 10, and by the above improvement arrangement, the connecting rod 71 drives the first piston member 72 to be in sliding fit with the inner peripheral wall of the first sleeve portion body 40a under the action of the differential pressure force, the second piston member 73 to be in sliding fit with the inner peripheral wall of the second sleeve portion body 50 when the electromagnetic directional valve is in the first operating state or the second operating state, and the valve body main body portion 10 only needs to perform the roughness process on the end face of the plate-shaped portion 11, instead of performing a series of processes such as surface processing and drawing on the inner peripheral wall of the whole cylindrical valve body portion as in the background art, the application has the advantages that the roughness processing requirement on the valve body main body part 10 is greatly reduced, the first sleeve part 40 and the second sleeve part 50 can be formed by punching, and the processing is more convenient, and the electromagnetic reversing valve comprises the valve body main body part, the first sleeve part and the second sleeve part through the optimal design, wherein the first sleeve part is fixedly connected with the valve body main body part, and the second sleeve part is fixedly connected with the valve body main body part, so that the processing of the valve body part is more convenient, the processing cost can be relatively reduced, and the product manufacturing cost can be reduced.

A second embodiment of the electromagnetic directional valve according to the present application is described below with reference to fig. 13 to 15, and is different from the first embodiment in that the valve body main body 10a includes a plate-shaped portion 11a and a surrounding portion 12a, in this embodiment, the plate-shaped portion 11a and the surrounding portion 12a are separately disposed and then welded and fixed, the plate-shaped portion 11a can be slidably engaged with the slider 80, the surrounding portion 12a can be formed by flanging and folding a single plate with the plate-shaped portion 11a as a bottom wall as a reference portion, the surrounding portion 12a has three wall-face-covering plate-shaped portions 11a, the surrounding portion 12a includes a top wall portion 121a, a first side wall portion 121a and a second side wall portion 122a, the first side wall portion 121a is disposed opposite to the second side wall portion 122a, the top wall portion 121a is disposed opposite to the top wall portion 11a, the top wall portion 121a is provided with a D connection portion, the first side wall portion 121a is fixedly connected to the plate-shaped portion 11a by laser welding or the like, the second side wall portion 122a and the plate portion 11a may be fixedly connected by a laser welding method or the like, so as to realize the fixed connection between the surrounding portion 12a and the plate portion 11a, the plate portion 11a may be formed by machining a plate material having a certain thickness, the thickness of the plate portion 11a is larger than that of the surrounding portion 12a, and the plate portion 11a is punched to form an E/S/C connection port portion, so that the machining and manufacturing of the valve body main portion can be facilitated, the machining cost of the valve body main portion as a whole can be relatively reduced, the shape of the longitudinal section of the valve body main portion 10a is different from that of the longitudinal section of the first sleeve portion 40, the shape of the longitudinal section of the valve body main portion 10a is different from that of the longitudinal section of the second sleeve portion 50, and the area enclosed by the longitudinal section of the valve body main portion 10a is larger than that enclosed by the longitudinal section of the first sleeve portion 40, the area enclosed by the longitudinal section of the valve body main body portion 10a is larger than the area enclosed by the longitudinal section of the second sleeve portion 50, in this embodiment, the area enclosed by the longitudinal section of the valve body main body portion 10a refers to the space enclosed by the longitudinal section of the valve body main body portion 10a and the plate-shaped portion 11a and the surrounding portion 12a, and through the above arrangement, the technical effects can also be achieved, and the specific description about the respective structures of the first sleeve portion and the second sleeve portion and the matching manner with other parts has been made in the first embodiment, which is not described in detail herein, and the embodiment includes the valve body main body portion 10a, the first sleeve portion 40 and the second sleeve portion 50 through the optimal design of the electromagnetic directional valve, where the first sleeve portion is fixedly connected with the valve body main body portion, the second sleeve portion is fixedly connected with the valve body main body portion, and the surrounding portion 12a is folded by the plate-shaped member, and then welded and fixed with the plate-shaped portion 11a is achieved, thereby forming the valve body portion 10a.

In the following, a third implementation manner of the electromagnetic directional valve provided by the present application will be briefly described, as shown in fig. 16-17, the difference between this implementation manner and the second implementation manner is that, compared with the first implementation manner and the second implementation manner, a valve seat portion 300 is added, in this implementation manner, the valve body main body portion 10 may also be integrally formed by stainless steel section, or formed by welding after flanging and folding a plate material, the valve body main body portion 10 includes a plate portion 11 and a surrounding portion 12, the valve seat portion 300 may be generally in a plate-shaped structure, the surrounding portion 12 is provided with a first connection portion, i.e. a D connection portion, the plate portion 11 is provided with a second connection portion, i.e. an E/S/C connection portion, correspondingly, the valve seat portion 300 is provided with a valve seat portion 301/302/303 corresponding to the E/S/C connection portion, the lower end surface of the valve seat portion 300 abuts against the plate portion 11b, and the valve seat portion 300 and the plate portion 11 may be fixedly connected by laser welding or the like, the valve seat part 300 can be in sliding fit with the sliding block 80, in this embodiment, the sliding block 80 and the valve seat part 300 are in sliding fit directly, the processing of the valve body main body part can be facilitated by adopting the scheme, the processing of the valve body part is more convenient, the processing cost can be relatively reduced, the manufacturing cost of products can be reduced, the plate-shaped part 11 which needs to be described can be fixedly connected with the surrounding part 12 after being separately arranged, namely, the surrounding part 12 of the second embodiment adopts a plate material piece to be folded and form three wall parts to realize the welding fixation with the plate-shaped part 11, and the plate-shaped part 11 and the surrounding part 12 are welded and fixed with the valve seat part 300 after being welded and fixed, therefore, the valve seat part adopts a plate-shaped part structure which is matched with the plate-shaped part, the width ratio of the valve seat part can be greatly increased, and the width of the valve seat part is increased, the size of the E/S/C connection adapter connected with the valve seat opening can be correspondingly increased, and the capacity of the lifting valve can be increased, so that the technical effect of the application can be realized.

In the following description, as shown in fig. 18-21, the structure of the plate-shaped portion 11b is improved, in this embodiment, the plate-shaped portion 11b and the surrounding portion 12b are integrally formed by profiles, the plate-shaped portion 11b is provided with a notch portion 111b, a part of the valve seat portion 300a is located in the notch portion 111b, the thickness of the valve seat portion 300a is greater than that of the plate-shaped portion 11b, the valve seat portion 300a is embedded in the notch portion 111b, and the valve seat portion 300a is welded and fixed with the plate-shaped portion 11b, in order to facilitate positioning of the valve seat portion 300a in the valve body main body 10, the valve seat portion 300a may be further provided with a positioning step portion 301a to facilitate positioning and welding with the plate-shaped portion 11b, the valve seat portion 300a is raised upward relative to the upper surface of the plate-shaped portion 11b, the valve seat portion 300a is raised downward relative to the lower surface of the plate-shaped portion 11b, and the valve seat portion 300a is provided with a valve seat opening.

the valve body main part still includes platy portion and surrounding part, platy portion and surrounding part fixed connection or as an organic whole machine-shaping structure, the surrounding part is equipped with first connecting port portion, platy portion is equipped with two at least second connecting port portions, along the X- - -X' direction of electromagnetic directional valve, platy portion is located the bottom of valve body main part, surrounding part surrounds platy portion and sets up, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of first sleeve portion, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of second sleeve portion, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of first sleeve portion encloses, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of second sleeve portion encloses.

Through the optimal design to the electromagnetic reversing valve, the processing of valve body main part is more convenient, can reduce processing procedure relatively, reduce processing cost, and the platy portion structure of setting, the D type valve seat portion of background art is overcome and valve body curved surface cooperation, thereby take over the restricted condition of specification use, take over and platy portion cooperation, the latus rectum can increase the poppet valve capacity relatively, through setting the area that the biggest longitudinal section of valve body main part encloses to be greater than the area that the longitudinal section of first sleeve portion encloses, the area that the biggest longitudinal section of valve body main part encloses to be greater than the area that the longitudinal section of second sleeve portion encloses, the inner chamber of valve body main part 10 is great relatively, valve body main part 10 as the middle part in the in-service use can match commercial refrigerating system's big, and both ends adopt first sleeve portion and second sleeve portion, then can match less structure, the size of first sleeve portion and the second sleeve portion of both sides is adjustable, can adopt less size to realize the connection with valve body main part 10, make the application model of electromagnetic reversing valve wider machine type switch the machine type main part and also can correspond the short valve body length.

Referring to a method for installing a piston rod assembly and a valve body 100 of a typical electromagnetic directional valve in fig. 22, a piston rod assembly 300 includes a connecting rod 301, a first piston member 302 and a second piston member 303, wherein after one end of the connecting rod 301 is fastened and fixed by a screw, the first piston member 302 is pushed in through an opening on one side of the valve body 100 together with the connecting rod 301, the first piston member 302 is pushed out through an opening on the other side of the valve body 100, and then the second piston member 303 is fixedly connected with the other end of the connecting rod 301 and then is installed in the valve body 100, and during the installation, the piston bowl of the first piston member 301 and the opening side of the piston bowl of the second piston member 302 are installed toward the opening on one side of the valve body 100, so that damage is easily caused to the piston bowl of the piston member during the installation.

In view of the above technical problems, the application further provides a new installation method of the electromagnetic directional valve, and the installation method of the electromagnetic directional valve according to the first embodiment provided by the application is described in detail below with reference to the accompanying drawings, as shown in fig. 23, which is an exploded schematic diagram of the overall structure of the electromagnetic directional valve according to the first embodiment provided by the application,

Step S1: in preparing a valve body main body part 10 of an electromagnetic directional valve, as shown in fig. 3 and 18-19, the valve body main body part 10 can be integrally formed by stainless steel section bars or formed by flanging and folding plate materials, the valve body main body part is integrally formed with a plate-shaped part 11 and a surrounding part 12, the plate-shaped part 11 and the surrounding part 12 are integrally formed, the surrounding part 12 is provided with a first connecting port part, namely a D connecting port part, two sides of the valve body main body part 10 are respectively provided with openings 102 and 103, the plate-shaped part 11 is provided with at least two second connecting port parts, and the electromagnetic directional valve can be a three-way valve, a four-way valve or a five-way valve, in the installation method of the electromagnetic directional valve provided by the application, the plate-shaped part 11 is provided with a first flanging part 111, a second flanging part 112 and a third flanging part 113 along the height direction of the electromagnetic directional valve by taking the four-way valve as an example, the first flange part, the second flange part and the third flange part are downwards flange-molded to respectively form an E connection port, an S connection port and a C connection port, the valve body main body part also comprises a fourth flange part 114, the fourth flange part 114 is upwards flange-molded to correspondingly form a D connection port, the surrounding part 12 at least comprises one plate-shaped part structure, the top wall and the side walls of the surrounding part 12 can also be provided with arc-shaped surface structures or other structures with certain radians according to meeting the requirement of fluid stress, the installation method of the electromagnetic directional valve provided by the application takes the valve body main body part as a square structure for illustration, the square structure comprises structures such as a cuboid, a cube, a trapezoid and other abnormal shapes, the valve body main body part can also lead to a D-shaped semicircle structure, the valve body part 10 can be directly made of a section bar or can be unfolded by adopting a whole plate material, a D connecting opening part and an E/S/C connecting opening part are firstly punched, then a plate-shaped part 11 is taken as a reference surface, a surrounding part 12 with three surface wall parts is formed after flanging and folding, the tail end part of the folding wall of the surrounding part 12 and the plate-shaped part 11 are welded and fixed in a laser welding mode, and the like, the whole valve body part is integrally formed by the section bar or is formed by folding the plate material and then welding, the electromagnetic reversing valve is also provided with a valve seat part 300, the whole valve seat part 300 can be in a plate-shaped structure, the valve seat part 300 is provided with a valve seat opening part 301/302/302 corresponding to the E/S/C connecting opening part, the valve seat part 300 is placed in one side opening 102 or 103 of the valve body part, the lower end surface of the valve seat part 300 is propped against the plate-shaped part 11b and welded and fixed with the plate-shaped part 11, and the valve seat part 300 can be in sliding fit with the sliding block 80;

In step S1, the electromagnetic directional valve is further provided with a first connecting pipe and at least two second connecting pipes, the first connecting pipe is a D connecting pipe, the first connecting pipe is placed in the first connecting port, namely the D connecting port, the second connecting pipe is an E/S/C connecting pipe, the second connecting pipe is placed in the E/S/C connecting port, and after the placement of the first connecting pipe and the second connecting pipe is completed, the first connecting pipe and the second connecting pipe are welded and fixed with the valve body main body 10 through furnace welding or the first connecting pipe and the second connecting pipe can also be welded and fixed with the valve body main body 10 through laser welding, so that a structure of a welding completion state of the valve body main body 10 and each connecting pipe in fig. 4 is formed.

In the preparation of the valve body portion 10 in the step S1, the arrangement of the valve seat 300 may be omitted, so that the plate-shaped portion 11 may be directly slidably engaged with the slider 80, the valve body portion may be prepared by adopting the structure of the valve body portion 10, and in the valve body portion in the second structure, as shown in fig. 25 to 27, the plate-shaped portion 11a and the surrounding portion 12a of the valve body portion 10a may be separately arranged and then welded and fixed, the surrounding portion 12a may be formed by folding a whole plate material with the plate-shaped portion 11a as a base, the surrounding portion 12a has three wall portions, the surrounding portion 12a includes a top wall portion 121a, a first side wall portion 121a and a second side wall portion 122a, the first side wall portion 121a is arranged opposite to the second side wall portion 122a, the top wall portion 121a is provided with a D connection opening, the first side wall portion 121a and the plate-shaped portion 11a are fixedly connected by welding, and the second side wall portion 11a and the plate-shaped portion 11a are fixedly connected by a laser welding, and the surrounding portion 12a is formed by forming a connection tube-shaped portion having a thickness C with the surrounding portion 11a by forming a connection portion having a thickness C, and forming a connection thickness E with the surrounding portion 11a is increased in order to form a thickness E;

In preparing the valve body main body portion of the third structure, as shown in fig. 30 to 32, the plate-like portion 11b and the surrounding portion 12b are integrally formed by a profile, the plate-like portion 11b is provided with a notched portion 111b, the valve seat portion 300a is driven by the valve body main body portion 10 with one side thereof open and placed therein, and a part of the valve seat portion 300a is placed in the notched portion 111b and positioned, the thickness of the valve seat portion 300a is set to be larger than the thickness of the plate-like portion 11b, the valve seat portion 300a is fitted in the notched portion 111b, and the valve seat portion 300a and the plate-like portion 11b are welded and fixed.

The installation method of the electromagnetic directional valve further comprises the following steps:

step S2: preparing a connecting rod 71, a first piston member 72 and a second piston member 73, wherein the first piston member 72 is fixedly connected with a first end connecting part 71a of the connecting rod 71, the first piston member 72 can be fixed by a screw tightening mode or a riveting mode, the second piston member 73 is fixedly connected with a second end connecting part 71b of the connecting rod 71, and a piston connecting rod assembly is formed after the connection of the first piston member 72 and the second piston member 73;

step S2 also comprises the steps of preparing a sliding block part 80, and performing clearance installation fit on the connecting rod 71 and the sliding block 80;

in the case of fixedly connecting the rod to the first piston member 72 or the second piston member 73, the installation step of riveting the rod to the first piston member 72 is described by taking the fixed installation of the rod to the first piston member 72 as an example, as shown in fig. 6 to 7, the first end connecting portion 71a of the rod 71 includes upward and downward burring portions, the two burring portions are formed with through holes, the first piston member 72 includes a first pressing piece 724, a first gasket 721, a first piston bowl 722 and a first elastic member 723, the first pressing piece, the first gasket, the first piston bowl and the first elastic member are respectively formed with communication holes corresponding to the through holes of the first end connecting portion, a rivet portion 500 is prepared, the large end portion 721 of the rivet portion 500 is abutted against the first gasket 721, and after the body of the rivet portion 500 is sequentially passed through the first pressing piece 721, the first piston bowl 722, the first elastic member 723, the communication holes of the first pressing piece 724 and the through holes of the first end connecting portion 71a, the piston assembly is positioned by a tool, and the rivet portion body of the rivet portion exposed to the through holes of the first end connecting portion 71a is riveted to realize the first rivet connection of the rod member 71; alternatively, the large end of the rivet portion 500 may be abutted against the first end connection portion 71a, so that the body of the rivet portion 500 sequentially passes through the through hole of the first end connection portion 71a and the first pressing piece 724, the first elastic member 723, the first piston bowl 722 and the communication hole of the first gasket 721, the piston rod assembly is positioned by using a tooling, the body of the rivet portion exposed out of the communication hole of the first gasket is riveted and fixed with the connecting rod, the first piston member 72 includes the first piston bowl 722, the first piston bowl 722 includes the first body 722a and the first extension portion 722b, the outer diameter of the first extension portion 722b facing the second piston member 73 is larger than the outer diameter of the first extension portion 722b relatively near the first body 722a, the second piston member 73 includes the second piston bowl, the second piston bowl includes the second body and the second extension portion, and the outer diameter of the second extension portion facing the first piston member 72 is larger than the outer diameter of the second extension portion relatively near the second body;

Step S3: the electromagnetic directional valve is further provided with a first sleeve part 40, a second sleeve part 50, a first connecting seat and a second connecting seat, wherein the first sleeve part 40 and the first connecting seat are fixedly connected in a manner of interference press fit or laser welding, or the first sleeve part 40 is provided with a first connecting seat in a manner of processing such as pole feeding die stamping, the first connecting seat and the first sleeve part 40 are fixedly connected or integrally processed into a forming structure, the second sleeve part 50 and the second connecting seat are fixedly connected in a manner of interference press fit or laser welding, or the second sleeve part 50 is provided with a second connecting seat in a manner of processing such as pole feeding die stamping, the second connecting seat and the second sleeve part 50 are fixedly connected or integrally processed into a forming structure, in a first structure for preparing the first connecting seat and the second connecting seat, as shown in fig. 8, the first connecting seat is in a shape of a substantially square plate structure, the first connecting seat 20 is matched with the valve body 10, the first connecting seat 20 comprises a first hole path part 211 and a first matching part 22, the first hole path part 21 is further provided with the second connecting seat body 211, the first connecting seat 31 is matched with the first hole path 31, the first hole path 31 is matched with the second hole path 31, the first hole path 31 is further matched with the second hole path 31, and the first hole path 30 is formed in a shape of the first hole path 31, and the first hole path 31 is matched with the second hole path 31, the first hole path 31 is matched with the second hole path 31, and the second hole path 31 is matched with the second hole path 31;

In the second structure for preparing the first connecting seat and the second connecting seat, the structure of the first connecting seat 20 'and the second connecting seat 30' is improved, the first connecting seat 20 'comprises a first connecting seat body 21' and a first bulge 22', a first hole channel part 211' is further arranged, the shape of the first connecting seat body 21 'is matched with that of the valve body main body, the first bulge 22' is relatively far away from the peripheral part of the first connecting seat body 21', the first bulge 22' is outwards turned and protruded relative to the first connecting seat body, the first hole channel part 211 'penetrates through the first bulge 22' and the first connecting seat body 21', the second connecting seat 30' comprises a second connecting seat body 31 'and a second bulge 32', a second hole channel part 311 'is also arranged, the shape of the second connecting seat body 31' is matched with that of the valve body main body, the second bulge 32 'is relatively far away from the peripheral part of the second connecting seat body, the second bulge 32' is outwards turned and protruded relative to the second connecting seat main body, the second hole channel part 311 'penetrates through the second bulge 32' and the second connecting seat body, and the second connecting seat is stretched relatively far away from the first connecting seat main body, and the first connecting seat is formed relatively easily;

The first sleeve portion 40 has a substantially closed tubular structure having an opening at one end and an opening at the other end, the second sleeve portion 50 has a substantially closed tubular structure having an opening at the other end, the longitudinal section of the valve body portion 10 is shaped differently from the longitudinal section of the first sleeve portion 40 in the height direction of the electromagnetic directional valve, the longitudinal section of the valve body portion 10 is shaped differently from the longitudinal section of the second sleeve portion 50, the area of the area surrounded by the largest longitudinal section of the valve body portion is set to be larger than the area surrounded by the longitudinal section of the first sleeve portion 40, the area surrounded by the largest longitudinal section of the valve body portion is set to be larger than the area surrounded by the longitudinal section of the second sleeve portion 50, at least a part of the first sleeve portion 40 is formed with a tubular structure so as to be in sliding fit with the first piston member 72, at least part of the second sleeve part 50 is formed with a cylindrical structure to be in sliding fit with the second piston member 73, the first sleeve part 40 may be formed with a first closing part 42, a first recess 41 and a first sleeve part opening by a polar progressive die stamping, the second sleeve part 50 may be formed with a second closing part 52, a second recess 51 and a second sleeve part opening by a polar progressive die stamping, the first recess 41 is formed with a first positioning part 411, the second recess 51 is formed with a second recess 511, the first recess 41 is provided with a first connecting hole part, the second recess 51 is provided with a second connecting hole part, or the first sleeve part 40 may be formed with a first reduced diameter part 41', the first reduced diameter part 41' includes a first closing part 42', the first sleeve part body 40a is closer to the second sleeve part 50 than the first reduced diameter part 41', the first reducing portion 41' is provided with a first positioning portion 411', the second sleeve portion 50 is provided with a second reducing portion 51', the second reducing portion 51' is processed to form a second closing portion 52', the second sleeve portion body 50a is closer to the first sleeve portion 40 than the second reducing portion 51', the second reducing portion 51' has a smaller diameter than the second sleeve portion body 50a, the second reducing portion 51' is provided with a second positioning portion 511', as shown in fig. 2, 9 and 11, a part of the first sleeve portion body 40a is placed in the first duct portion 211'/211 and can be fixedly connected by means of laser welding or the like, or a part of the first sleeve portion body 40a is press-fitted into the first duct portion 211'/211 so that the two are fixedly connected, the valve body places a part of the second sleeve portion body 50a in the second duct portion 311' and can be fixedly connected by means of laser welding or the like, or a part of the second sleeve portion body 50a is press-fitted into the second duct portion 311' so that the two are fixedly connected.

S4: the piston connecting rod assembly as a whole and the sliding block 80 are installed through one side opening 102 or 103 of the valve body main body part, and the piston connecting rod assembly is positioned by a fixture so as to form a structure as shown in the lower view of fig. 5;

step S5, the first sleeve part 40 with the first connecting seat 20' is installed from the opening 102 on one side of the valve body main body part 10, when the first piston component 72 is installed in the first sleeve part 40, a part of the first extending part 722b with a smaller outer diameter, which is relatively close to the first body 722a side, and a part of the first extending part 722b with a larger outer diameter, which is towards the second piston component 73 side, are sequentially installed through the opening of the first sleeve part, and the first sleeve part 40 can be in sliding fit with the first piston bowl of the first piston component 72;

loading the second sleeve part 50 with the second connecting seat 30' from the opening 103 at the other side of the valve body main body part 10, sequentially loading a part of the second extension part with a smaller outer diameter relatively close to the second body side and a part of the second extension part with a larger outer diameter toward the first piston part 72 side through the second sleeve part opening when loading the second piston part 73 into the second sleeve part 50, the second sleeve part 50 being capable of sliding fit with the second piston bowl of the second piston part;

The outer peripheral wall of the first fitting portion 22 may be abutted against and welded to the inner peripheral wall of the valve body portion, or the inner peripheral wall of the first fitting portion 22 may be abutted against and welded to the outer peripheral wall of the valve body portion, so that the first connecting seat 20 is fixedly connected to one side of the valve body portion, and the first sleeve portion 40 is fixedly connected to the valve body portion; the inner peripheral wall of the second fitting portion 32 may be abutted against and welded to the outer peripheral wall of the other side of the valve body portion, or the outer peripheral wall of the second fitting portion 32 may be abutted against and welded to the inner peripheral wall of the other side of the valve body portion, so that the second connection seat 30 is fixedly connected to the other side of the valve body portion, thereby fixedly connecting the second sleeve portion 50 to the valve body portion;

or the first bulge 22 'is placed towards the direction away from the valve body main part, the second bulge 32' is arranged towards the direction away from the valve body main part, the first connecting seat body 21 'is propped against the inner peripheral wall at one side of the valve body main part 10 and is welded and fixed, so that the first connecting seat 20' is fixedly connected with one side of the valve body main part, the first sleeve part 40 is fixedly connected with the valve body main part, the second connecting seat body 31 'is propped against the inner peripheral wall at the other side of the valve body main part 10 and is welded and fixed, the second connecting seat 30' is fixedly connected with the other side of the valve body main part, and the second sleeve part 50 is fixedly connected with the valve body main part;

It should be noted that in the above-mentioned mounting steps S1 to S5, the three steps of S1 preparing the valve body main body portion, the first connecting tube, and the second connecting tube, the matching relationship between them, S2 preparing the piston connecting rod assembly and the slider, the connecting relationship between them, and S3 preparing the first sleeve portion 40, the second sleeve portion 50, the first connecting seat, and the second connecting seat may be interchanged, and the technical effects of the present application may also be achieved.

By designing and improving the overall structure and the installation method of the electromagnetic directional valve, when the first piston part and the second piston part are installed, compared with the prior art that the piston bowls of the first piston part and the second piston part are reversely installed in the valve body at the side with larger openings, in the installation method of the electromagnetic directional valve provided by the application, the first extension part of the first piston bowl of the first piston part is installed in the first sleeve part at the side with smaller outer diameter, the second extension part of the second piston bowl of the second piston part is respectively installed in the second sleeve part at the side with smaller outer diameter, the first sleeve part can be in sliding fit with the first piston bowl, the second sleeve part can be in sliding fit with the second piston bowl, the installation mode of the sequential installation is adopted, and the inner peripheral wall of the first sleeve part can be installed along the first extension part of the first piston bowl during the installation, the inner peripheral wall of the second sleeve part can be installed along the second extension part of the second piston bowl, so that the situation that the piston part is easy to damage in the installation process is relatively reduced.

The second embodiment provided by the application is described below, and the installation method of the electromagnetic directional valve provided by the application at least comprises the following steps:

step S1: in preparing the valve body 10 of one structure, as shown in fig. 3 and 18-19, the valve body 10 may be integrally formed by stainless steel section, or formed by folding a plate material, the valve body is integrally formed with a plate-shaped portion 11 and a surrounding portion 12, the plate-shaped portion 11 and the surrounding portion 12 are integrally formed, the surrounding portion 12 is provided with a first connection port, i.e. a D connection port, openings are respectively formed on two sides of the valve body 10, 102 and 103 are respectively formed, the plate-shaped portion 11 is provided with at least two second connection ports, and the electromagnetic directional valve may be a three-way, four-way or five-way valve, in the installation method of the electromagnetic directional valve provided by the application, the four-way valve structure is exemplified, the plate-shaped portion 11 is provided with a first flanging portion 111, a second flanging portion 112 and a third flanging portion 113 along the height direction of the electromagnetic directional valve, the first flanging part, the second flanging part and the third flanging part are downwards flanging molded to respectively form an E connecting port, an S connecting port and a C connecting port, the valve body main body part also comprises a fourth flanging part 114, the fourth flanging part 114 is upwards flanging molded to correspondingly form a D connecting port, the surrounding part 12 at least comprises a plate-shaped part structure, the top wall and the side walls of the surrounding part 12 can also be provided with arc-shaped surface structures or other structures with certain radians according to the requirement of meeting the fluid stress, the installation method of the electromagnetic directional valve provided by the application takes the valve body main body part as a square body structure for illustration, the square body structure comprises structures such as a cuboid, a cube, a trapezoid and other abnormal bodies, the valve body main body part can also lead the D-shaped semicircular structure, the valve body main body part 10 can also be expanded by adopting a whole plate material piece besides being directly manufactured by using a section bar, punching to form a D connection opening and an E/S/C connection opening, flanging and folding the connection opening by taking the plate-shaped part 11 as a reference surface to form a surrounding part 12 with three surface wall parts, welding and fixing the tail end part of the folded wall of the surrounding part 12 and the plate-shaped part 11 in a laser welding mode, wherein the whole valve body part is integrally formed by a section bar, or the plate-shaped part is folded and then welded and formed, the electromagnetic directional valve is further provided with a valve seat part 300, the valve seat part 300 is provided with a valve seat opening 301/302/302 corresponding to the E/S/C connection opening, the valve seat part 300 is placed in one side opening of the valve body part and welded and fixed with the plate-shaped part 11, and the embodiment that the valve body part can be prepared into other structures is detailed in the first embodiment and is not repeated here;

Step S1 further comprises preparing a first connecting pipe and a second connecting pipe of the electromagnetic reversing valve, wherein the first connecting pipe is a D connecting pipe, the first connecting pipe is placed in a first connecting opening, namely the D connecting opening, the second connecting pipe is an E/S/C connecting pipe, the second connecting pipe is placed in the E/S/C connecting opening, and the first connecting pipe and the second connecting pipe are welded and fixed with the valve body main body 10 through furnace welding after being placed, or the first connecting pipe and the second connecting pipe can also be welded and fixed with the valve body main body 10 through a laser welding mode, so that a left side view structure of FIG. 13 is formed;

step S2: preparing a first sleeve part 40 and a first connecting seat, fixedly connecting or processing the first sleeve part and the first connecting seat into an integrated structure, wherein the first connecting seat can adopt a first connecting seat 20 structure or a first connecting seat 20' structure with the structure shown in fig. 8, in the embodiment, taking the preparation of the first connecting seat 20' as an example for illustration, and welding and fixing the first connecting seat 20' and the first sleeve part 40;

step S3: preparing a connecting rod 71, a first piston member 72 and a second piston member 73, wherein the first piston member 72 is fixedly connected with a first end connecting part 71a of the connecting rod 71, the first piston member 72 can be fixed by a screw tightening mode or a riveting mode, the second piston member 73 is fixedly connected with a second end connecting part 71b of the connecting rod 71, and a piston connecting rod assembly is formed after the connection of the first piston member 72 and the second piston member 73;

Step S3 further includes: preparing a slider part 80, and performing clearance installation fit on a connecting rod 71 and the slider 80;

step S4: then, the first sleeve part 40 provided with the first connecting seat 20' is placed in the opening 102 at one side of the valve body part, and the first connecting seat 20' and one side of the valve body part are welded and fixed to realize the fixed connection of the first sleeve part 40 and the valve body part, or the first sleeve part 40 can be integrally formed with the first connecting seat 20' through processing, so that the fixed connection of the first sleeve part and the valve body part can be realized;

step S5, loading the whole piston connecting rod assembly and the sliding block 80 through the other side opening 103 of the valve body main body part, and sequentially loading a part of the first extending part 722b with a smaller outer diameter, which is relatively close to one side of the first body 722a, and a part of the first extending part with a larger outer diameter, which is towards one side of the second piston component 73, through the opening of the first sleeve part when loading the first piston component 72 into the first sleeve part 40, wherein the first sleeve part 40 can be in sliding fit with a first piston bowl of the first piston component 72, and positioning a tool for the piston connecting rod assembly;

step S6: preparing a second sleeve part 50 and a second connecting seat, fixedly connecting or processing the second sleeve part 50 and the second connecting seat to form an integral structure, wherein the second connecting seat can adopt the second connecting seat 30 structure of the structure shown in fig. 8 or the second connecting seat 30' structure, in the embodiment, taking the preparation of the second connecting seat 30' as an example, the second connecting seat 30' and the second sleeve part 50 are welded and fixed by a laser welding mode or the like, then the second sleeve part 50 provided with the second connecting seat 30' is placed in the other side opening 103 of the valve body main body part, or the second sleeve part 50 can also be integrally formed with the second connecting seat 30' through processing, when the second piston part 73 is placed in the second sleeve part 50, a part second extending part with a smaller outer diameter, a part second extending part with a larger outer diameter facing the first piston part 72 side, and the second sleeve part 50 can be matched with a second piston bowl of the second piston part 73 in a sliding mode through the opening of the second sleeve part;

The second connecting seat 30' is welded and fixed to the other side of the valve body so that the second sleeve part 50 is fixedly connected to the valve body.

In this embodiment, the manufacturing sequence of the valve body main body, the first connection pipe, the second connection pipe and the connection relation between the first connection pipe and the second connection pipe in step S1, the connection relation between the first sleeve part and the first connection seat in step S2, the preparation of the piston connecting rod assembly and the sliding block in step S3, and the manufacturing sequence of the related cooperation relation are interchangeable, so that the technical effects of the application can be achieved.

The third embodiment of the present application is different from the second embodiment in that in step S3 of the second embodiment, the second sleeve portion may be fixedly connected to the second connecting seat or integrally formed, and then welded and fixed to the valve body main body as a whole, and then subsequently installed.

Step S1: preparing a valve body part 10, wherein the valve body part 10 can be integrally formed by stainless steel section materials, or a plate material piece is formed after being folded by flanging, the valve body part is integrally formed with a plate-shaped part 11 and a surrounding part 12, the plate-shaped part 11 and the surrounding part 12 are integrally formed, the surrounding part 12 is provided with a first connecting opening part, namely a D connecting opening part, two sides of the valve body part 10 are respectively formed with openings 102 and 103, the plate-shaped part 11 is provided with at least two second connecting opening parts, the plate-shaped part 11 is provided with a first flanging part 111, a second flanging part 112 and a third flanging part 113 along the height direction of the electromagnetic directional valve, the first flanging part, the second flanging part and the third flanging part are downwards flanging and correspondingly formed into an E connecting opening part, an S connecting opening part and a C connecting opening part respectively, the valve body part also comprises a fourth flanging part 114, the fourth flanging part 114 is upwards flanging and correspondingly formed into the D connecting opening part, the surrounding part 12 comprises at least one plate-shaped part structure, and it is to be noted that according to the requirement of fluid stress, the top wall and the side walls of the surrounding part 12 can be provided with arc-shaped surface structures with a certain radian or other structures, the installation method of the electromagnetic reversing valve provided by the application takes the main body part of the valve body as a square structure for illustration, the square structure comprises a cuboid, a cube, a trapezoid and other special-shaped structures, the main body part of the valve body can also be a D-shaped semicircular structure, the main body part 10 of the valve body can also be expanded by adopting a whole plate material except for being directly made of a section bar, the D connecting opening and the E/S/C connecting opening are firstly punched, the plate-shaped part 11 is taken as a reference surface, the surrounding part 12 with three surface wall parts is formed after flanging and folding, the end part of the folded wall of the surrounding part 12 and the plate-shaped part 11 are welded and fixed by means of laser welding and the like, the whole valve body part is integrally formed by a section bar, or the plate-shaped part is folded and then welded and formed, the electromagnetic reversing valve is also provided with a valve seat part 300, the valve seat part 300 is provided with a valve seat opening part 301/302/302 corresponding to the E/S/C connecting opening part, the valve seat part 300 is placed into the valve body part from one side opening and welded and fixed with the plate-shaped part 11, and the embodiment of the valve body part which can be also prepared into other structures is not described in detail in the first embodiment;

Step S1 also comprises the steps of preparing a first connecting pipe and a second connecting pipe of the electromagnetic reversing valve, wherein the first connecting pipe is a D connecting pipe, the first connecting pipe is placed in a first connecting opening, namely the D connecting opening, the second connecting pipe is an E/S/C connecting pipe, the second connecting pipe is placed in the E/S/C connecting opening, and the first connecting pipe and the second connecting pipe are welded and fixed with the valve body main body 10 through furnace welding after being placed, or the first connecting pipe and the second connecting pipe can also be welded and fixed with the valve body main body 10 in a laser welding mode;

step S2: preparing a second sleeve part 50 and a second connecting seat, fixedly connecting or processing the second sleeve part and the second connecting seat into an integrated structure, wherein the second connecting seat can adopt a second connecting seat 30 structure of the structure shown in fig. 8 or a second connecting seat 30 'structure, in the embodiment, the second connecting seat 30' is prepared by taking the second connecting seat 30 'as an example for explanation, and the second connecting seat 30' and the second sleeve part 50 are welded and fixed; step S3: preparing a connecting rod 71, a first piston member 72 and a second piston member 73, wherein the first piston member 72 is fixedly connected with a first end connecting part 71a of the connecting rod 71, the first piston member 72 can be fixed by a screw tightening mode or a riveting mode, the second piston member 73 is fixedly connected with a second end connecting part 71b of the connecting rod 71, and a piston connecting rod assembly is formed after the connection of the first piston member 72 and the second piston member 73;

Step S3 further comprises the steps of preparing a sliding block part 80, and performing clearance installation fit on the connecting rod 71 and the sliding block 80;

step S4: then the second sleeve part component is placed in the valve body through the opening 103 on one side of the valve body, and the second connecting seat 30 'is welded and fixed with the other side of the valve body to realize the fixed connection between the second sleeve part 50 and the valve body, or the second sleeve part 50 can be integrally formed with the second connecting seat 30' through processing, so that the fixed connection between the second sleeve part and the valve body can be realized;

step S5: when the first piston member 72 is assembled into the second sleeve portion 50, a part of the second extension portion of the second piston bowl having a smaller outer diameter and a part of the second extension portion of the second piston bowl having a larger outer diameter and facing the first piston member 72 are sequentially assembled through the opening of the second sleeve portion, and the second sleeve portion 50 can be slidably engaged with the second piston bowl of the second piston member 73 to position the tool for the piston rod assembly;

step S6: preparing a first sleeve part 40 and a first connecting seat, fixedly connecting or processing the first sleeve part 40 and the first connecting seat to form an integral structure, wherein the first connecting seat can adopt the first connecting seat 20 structure of the structure of fig. 8 or the first connecting seat 20', in the embodiment, taking the preparation of the first connecting seat 20' as an example, the first connecting seat 20 'and the first sleeve part 40 are welded and fixed by laser welding or the like, then a first sleeve part component is placed in an opening 102 on one side of a valve body main body part, or the first sleeve part 40 can be integrally formed with the first connecting seat 20', when the first piston part 72 is installed in the first sleeve part 40, a part of a first extending part 722b with a smaller outer diameter, a part of a first extending part 722b with a larger outer diameter, which faces one side of a second piston part 73, are sequentially installed in the opening of the first sleeve part, and the first sleeve part 40 can be in sliding fit with a first piston bowl of the first piston part 72;

The first connecting seat 20' is welded and fixed to the other side of the valve body so that the first sleeve portion 40 is fixedly connected to the valve body.

In this embodiment, the manufacturing sequence of the valve body main body, the first connection pipe, the second connection pipe and the connection relation between the first connection pipe and the second connection pipe, the connection relation between the second sleeve part and the second connection seat prepared by S2, the preparation of the piston connecting rod assembly and the sliding block of S3 and the manufacturing sequence of the related matching relation are interchangeable, so that the technical effects of the application can be realized.

A fourth embodiment of the present application for providing an installation method of an electromagnetic directional valve is described below, which is different from the foregoing embodiments in that steps S1 and S2 are improved in the installation steps of the present embodiment:

step S1: preparing a valve body main body part 10, a first connecting pipe, at least two second connecting pipes, a first sleeve part 40 and a first connecting seat of the electromagnetic reversing valve, wherein the valve body main body part 10 comprises a plate-shaped part 11 and a surrounding part 12, the plate-shaped part 11 and the surrounding part 12 are fixedly connected or are of an integrated structure, the surrounding part 12 is provided with a first connecting opening part which is a D connecting opening part, the plate-shaped part 11 is provided with at least two second connecting opening parts which are E/S/C connecting opening parts, the first connecting pipe is arranged in the first connecting opening part, the second connecting pipe is arranged in the second connecting opening part, the first sleeve part 40 and the first connecting seat 20'/20 are fixedly connected in a manner of pressing fit or laser welding and the like between a part of a first sleeve part body 40a and a first pore canal part 211'/211, or the first sleeve part 40 and the first connecting seat 20/20 'are of an integrated structure, the whole first sleeve part 40 provided with the first connecting seat is arranged in one side opening 102 of the valve body main body part, the part of the first connecting seat 20/20' and the main body part are abutted, for example, the first connecting seat and the main body part are positioned, the first connecting pipe and the first connecting seat 20 'can be arranged in the first connecting pipe and the first connecting seat 20';

step 2 further comprises preparing a slider component 80, and performing clearance installation fit on the connecting rod 71 and the slider 80;

step S3: when the first piston member 72 is fitted into the first sleeve portion 40, the first sleeve portion 40 is slidably fitted to the first piston bowl of the first piston member 72, and the tool for a piston rod assembly is positioned by sequentially fitting the first extension portion 722b having a smaller outer diameter, which is relatively close to the first body 722a, and the first extension portion 722b having a larger outer diameter, which is directed toward the second piston member 73, through the opening of the first sleeve portion;

step S4: preparing a second sleeve part 50 and a second connecting seat 30/30', fixedly connecting or processing the second sleeve part 50 and the second connecting seat to form an integral structure, wherein the second connecting seat can adopt the second connecting seat 30 structure of the structure shown in fig. 8 or the second connecting seat 30' structure, in the embodiment, taking the preparation of the second connecting seat 30' as an example, the second connecting seat 30' and the second sleeve part 50 can be welded and fixed by a mode of pressing and fitting a second sleeve part body 50a and a second hole channel part 311'/311 or by a laser welding or the like, then the second sleeve part 50 provided with the second connecting seat 30'/30 is placed in an opening 103 at the other side of the valve body part, or the second sleeve part 50 can also be integrally formed with the second connecting seat 30', when the second piston part 73 is placed in the second sleeve part 50, the second sleeve part 50 can be sequentially placed in a part with a smaller outer diameter, a part with a larger outer diameter towards one side of the first piston part 72, and the second sleeve part with a second piston part 73 can be slidably matched with the second bowl part;

The second connecting seat 30'/30 is welded and fixed to the other side of the valve body by means of laser welding or the like, so that the second sleeve portion 50 is fixedly connected to the valve body.

In this embodiment, the step S1 and the step S2 may be interchanged, which can also reduce the damage of the piston component during the assembly process.

The fifth embodiment of the method for installing an electromagnetic directional valve according to the present application is different from the fourth embodiment in that the second sleeve portion and the second connection seat may be prepared in step S1, and the installation steps in this embodiment at least include the following installation steps:

s1: preparing a valve body main part 10, a first connecting pipe, at least two second connecting pipes, a second sleeve part 50 and a second connecting seat of the electromagnetic reversing valve, wherein the valve body main part 10 comprises a plate-shaped part 11 and a surrounding part 12, the plate-shaped part 11 and the surrounding part 12 are fixedly connected or are of an integrated structure, the surrounding part 12 is provided with a first connecting port part, namely a D connecting port part, the plate-shaped part 11 is provided with at least two second connecting port parts, namely E/S/C connecting port parts, the first connecting pipe is arranged in the first connecting port part, the second connecting pipe is arranged in the second connecting port part, the second sleeve part 50 and the second connecting seat 30'/30 are fixedly connected in a pressing fit or laser welding mode, or the second sleeve part 50 and the second connecting seat 30/30' are processed into an integrated structure, the whole second sleeve part 50 provided with the second connecting seat 30'/30 is arranged in an integrated structure through an opening 103 on one side of the valve body main part, part of the second connecting seat 30'/30 is propped against the other side of the valve body main part, for example, the second connecting seat 30/30 'and the other side of the main body part are positioned through pressing fit, the first connecting pipe and the second connecting seat 30'/30 'are arranged in the first connecting pipe and the second connecting port part, the first connecting pipe is arranged in the first connecting pipe and the second connecting port 30'/30;

S2: preparing a connecting rod 71, a first piston member 72 and a second piston member 73, wherein the first piston member 72 is fixedly connected with a first end connecting part 71a of the connecting rod 71, the first piston member 72 can be fixed by a screw tightening mode or a riveting mode, the second piston member 73 is fixedly connected with a second end connecting part 71b of the connecting rod 71, and a piston connecting rod assembly is formed after the connection of the first piston member 72 and the second piston member 73;

step S2 further comprises the steps of preparing a sliding block part 80, and performing clearance installation fit on the connecting rod 71 and the sliding block 80;

step S3: when the second piston member 73 is installed in the second sleeve portion 50, the second extension portion having a smaller outer diameter, which is relatively close to the second body side, and the second extension portion having a larger outer diameter, which is directed to the first piston member 72 side, are sequentially installed through the opening of the second sleeve portion, and the second sleeve portion 50 can be slidably engaged with the second piston bowl of the second piston member 73, and the tooling for the piston link assembly is positioned;

step S4: preparing the first sleeve part 40 and the first connecting seat 20'/20, fixedly connecting or processing the first sleeve part 40 and the first connecting seat into an integral structure, wherein the first connecting seat can adopt the first connecting seat 20 structure of the structure of fig. 8 or the first connecting seat 20' structure, in the embodiment, taking the preparation of the first connecting seat 20 'as an example, the first connecting seat 20' and the first sleeve part 40 are fixedly connected by a pressing fit or laser welding mode, etc., then the first sleeve part 40 provided with the first connecting seat 20 'is placed in the opening 102 of the other side of the valve body main body part, or the first sleeve part 40 can also be integrally formed with the first connecting seat 20' through processing, when the first piston part 72 is placed in the first sleeve part 40, the first extending part 722b with a smaller outer diameter, the first extending part 722b with a larger outer diameter facing the side of the second piston part 73 are sequentially placed in the opening of the first sleeve part, and the first sleeve part 40 can be matched with the first piston bowl of the first piston part 72 in a sliding mode;

The first connecting seat 20' is welded and fixed to one side of the valve body main body by means of laser welding or the like so that the first sleeve portion 50 is fixedly connected to the valve body main body.

The order of S1, S2 is interchangeable in this embodiment.

According to the installation method of the electromagnetic directional valve, compared with the prior art that when the first piston part and the second piston part are installed, the piston bowls of the first piston part and the second piston part are reversely installed in the valve body at the side with larger openings, in the installation method of the electromagnetic directional valve, the first extension part of the first piston bowl of the first piston part is installed in the first sleeve part at the side with smaller outer diameter, the second extension part of the second piston bowl of the second piston part is installed in the second sleeve part at the side with smaller outer diameter, the first sleeve part can be in sliding fit with the first piston bowl, the second sleeve part can be in sliding fit with the second piston bowl, the installation mode of sequential installation is adopted, and the inner peripheral wall of the first sleeve part can be installed along the first extension part of the first piston bowl during installation, and the inner peripheral wall of the second sleeve part can be installed along the second extension part of the second piston bowl, so that the situation that the piston part is easy to damage in the installation process is relatively reduced.

It should be noted that, the terms "upper" and "lower" or the terms "first" and "second" are all described based on the drawings of the specification, and only the naming manner of the different parts should not be considered as any limitation on the relevant order of the parts, but the above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the scope of the present invention.

Claims

1. The electromagnetic reversing valve is characterized by comprising a valve body part, wherein the valve body part comprises a valve body main body part, a first sleeve part and a second sleeve part, the first sleeve part and the second sleeve part are positioned on different sides of the valve body main body part, the first sleeve part is fixedly connected with the valve body main body part, the second sleeve part is fixedly connected with the valve body main body part, at least part of the first sleeve part is of a cylindrical structure, and at least part of the second sleeve part is of a cylindrical structure;

the valve body main part still includes platy portion and surrounding part, platy portion with surrounding part fixed connection or integrated into one piece structure, the surrounding part is folded by the panel turn-ups and is formed, the surrounding part is equipped with first connection oral area, platy portion is equipped with two at least second connection oral areas, follows the X-X' direction of electromagnetic reversing valve, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of first sleeve portion, the shape of the longitudinal section of valve body main part is different with the shape of the longitudinal section of second sleeve portion, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of first sleeve portion encloses, the area that the biggest longitudinal section of valve body main part encloses is greater than the area that the longitudinal section of second sleeve portion encloses.

2. The electromagnetic directional valve according to claim 1, wherein the first sleeve portion comprises a first sleeve portion body having a cylindrical structure, the second sleeve portion comprises a second sleeve portion body having a cylindrical shape, the electromagnetic directional valve further comprises a piston-rod assembly comprising a connecting rod, a first piston member and a second piston member, the first piston member is fixedly connected with a first end connection portion of the connecting rod, the second piston member is fixedly connected with a second end connection portion of the connecting rod, the first piston member is slidably engaged with an inner peripheral wall of the first sleeve portion body, and the second piston member is slidably engaged with an inner peripheral wall of the second sleeve portion body.

3. The electromagnetic directional valve according to claim 2, wherein the first sleeve portion includes a first closing portion, the first sleeve portion is provided with a first recess formed by inwardly recessing a surface of the first sleeve portion body, the first recess is located between the first closing portion and the first sleeve portion body, the first recess is provided with a first positioning portion; the second sleeve part comprises a second sealing part, the second sleeve part is provided with a second concave part, the second concave part is formed by inwards sinking the surface of the second sleeve part body, the second concave part is positioned between the second sealing part and the second sleeve part body, the second concave part is provided with a second positioning part, the first piston part can be propped against the first positioning part, and the second piston part can be propped against the second positioning part.

4. The electromagnetic directional valve according to claim 2, wherein the first sleeve portion is provided with a first reduced diameter portion, the first reduced diameter portion is provided with a first closed portion, the first reduced diameter portion has a smaller diameter than the first sleeve portion body, the first reduced diameter portion is provided with a first positioning portion, the second sleeve portion is provided with a second reduced diameter portion, the second reduced diameter portion is provided with a second closed portion, the second reduced diameter portion has a smaller diameter than the second sleeve portion body, the second reduced diameter portion is provided with a second positioning portion, the first piston member is able to abut against the first positioning portion, and the second piston member is able to abut against the second positioning portion.

5. The electromagnetic directional valve according to claim 1, wherein the valve body further comprises a first connecting seat and a second connecting seat, the first connecting seat is fixedly connected with the first sleeve portion or is in an integrally formed structure, the second connecting seat is fixedly connected with the second sleeve portion or is in an integrally formed structure, the first connecting seat is fixedly welded with the valve body main body portion so as to fixedly connect the first sleeve portion with the valve body main body portion, and the second connecting seat is fixedly welded with the valve body main body portion so as to fixedly connect the second sleeve portion with the valve body main body portion.

6. The electromagnetic directional valve according to claim 5, wherein the first connecting seat is adapted to the shape of the valve body main body, the first connecting seat is provided with a first hole portion penetrating the first connecting seat main body, and a first mating portion protruding outward from the outer edge portion of the first connecting seat main body, the second connecting seat is adapted to the shape of the valve body main body, the second connecting seat includes a second connecting seat main body and a second mating portion, the second connecting seat main body is provided with a second hole portion penetrating the second connecting seat main body, the second matching part protrudes outwards from the outer edge part of the second connecting seat body, the inner peripheral wall of the first matching part abuts against and is welded and fixed with the outer peripheral wall of the valve body main body part, which is close to one side of the first sleeve part, or the outer peripheral wall of the first matching part abuts against and is welded and fixed with the inner peripheral wall of the valve body main body part, which is close to one side of the first sleeve part, and the inner peripheral wall of the second matching part abuts against and is welded and fixed with the outer peripheral wall of the valve body main body part, which is close to one side of the second sleeve part, or the outer peripheral wall of the second matching part abuts against and is welded and fixed with the inner peripheral wall of the valve body main body part, which is close to one side of the second sleeve part.

7. The electromagnetic directional valve according to claim 5, wherein the first connecting seat comprises a first connecting seat body and a first boss portion, and further comprising a first hole portion, the first boss portion being relatively far from a peripheral portion of the first connecting seat body, the first boss portion being outwardly protruded with respect to the first connecting seat body, the first hole portion penetrating through the first boss portion and the first connecting seat body; the second connecting seat comprises a second connecting seat body and a second bulge part, a second pore canal part is further arranged, the second bulge part is relatively far away from the peripheral part of the second connecting seat body, the second bulge part is relatively outwards bulged from the first connecting seat body, and the second pore canal part penetrates through the second bulge part and the second connecting seat body.

8. The electromagnetic directional valve according to claim 6 or 7, wherein a part of the first sleeve portion is located in the first hole portion and welded to the first connection seat, a part of the second sleeve portion is located in the second hole portion and welded to the second connection seat, or a part of the first sleeve portion is press-fitted into the first hole portion and fixedly connected to the first connection seat, and a part of the second sleeve portion is press-fitted into the second hole portion and fixedly connected to the second connection seat.

9. The electromagnetic directional valve according to any one of claims 1 to 7, wherein the valve body main body portion is of a square or shaped body or a D-shaped semicircular structure, the electromagnetic directional valve further comprises a first connecting pipe and at least two second connecting pipes, the first connecting pipe is fixedly connected with the first connecting port portion, the second connecting pipe is fixedly connected with the second connecting port portion, and the valve body main body portion, the first sleeve portion, the second sleeve portion, the first connecting pipe and the second connecting pipe are all made of stainless steel materials.

10. The electromagnetic directional valve according to any one of claims 1 to 7, wherein the valve body portion is integrally formed by a profile or formed by folding and welding a plate member, and the plate-like portion and the surrounding portion are integrally formed.

11. The electromagnetic directional valve according to any one of claims 1 to 7, wherein the surrounding portion is folded with the plate-like portion as a reference portion, the surrounding portion includes a top wall portion, a first side wall portion, and a second side wall portion, the top wall portion is disposed opposite to the plate-like portion, the first side wall portion is disposed opposite to the second side wall portion, the first side wall portion is fixedly connected to the plate-like portion, the second side wall portion is fixedly connected to the plate-like portion, and the top wall portion is provided with the first connection port portion.

12. The electromagnetic directional valve according to any one of claims 1 to 7, further comprising a valve seat portion, wherein the valve body portion is integrally formed by a profile, or the valve body portion is formed by folding and welding a plate member, the plate portion and the surrounding portion are integrally formed, the valve seat portion has a substantially plate-like structure, the valve seat portion is provided with a valve seat opening portion corresponding to the second connection opening portion, the valve seat portion abuts against the plate portion and is welded and fixed, and the valve seat portion is capable of sliding fit with a slider of the electromagnetic directional valve.

13. The electromagnetic directional valve according to any one of claims 1 to 7, further comprising a valve seat portion, wherein the plate-like portion is provided with a notched portion, a part of the valve seat portion is located at the notched portion, the valve seat portion is welded to the plate-like portion, the thickness of the valve seat portion is greater than that of the plate-like portion, and the valve seat portion is raised with respect to an upper surface of the plate-like portion, and the valve seat portion is raised with respect to a lower surface of the plate-like portion.