Electro-hydraulic control reversing valve

Abstract

The utility model provides an electro-hydraulic control reversing valve which comprises a main valve and an electromagnetic pilot operated valve, the main valve comprises a valve body and a valve element assembly, the valve element assembly is located in the valve body, at least one part of the valve element assembly can reciprocate in the valve body, and the valve element assembly at least comprises a first valve sleeve, a second valve sleeve, a valve seat and a first threaded sleeve. Wherein the first valve sleeve is connected with the second valve sleeve, at least one part of the valve seat is located between the first valve sleeve and the second valve sleeve, and the first valve sleeve is detachably connected with the valve body through a first threaded sleeve; the electromagnetic pilot valve and the valve body are connected into a whole, and switching-on and switching-off of the electromagnetic pilot valve are used for controlling the reversing valve element to conduct reversing. According to the electro-hydraulic control reversing valve, the first threaded sleeve is arranged between the first valve sleeve and the valve body, so that the first valve sleeve is prevented from being directly connected with the valve body, the thread gluing problem generated in the repeated disassembly and assembly process of the valve element assembly is solved, the risks of thread gluing and scrapping are reduced, the reuse rate of parts is increased, and the cost is reduced. And the economical efficiency of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic components, specifically relates to an electro-hydraulic control reversing valve. BACKGROUND

[0002] The hydraulic valve is a basic element in the electro-hydraulic control system, and mainly includes a reversing valve, a safety valve, a check valve and the like. The hydraulic valve can be applied to various industries, such as coal mining. The hydraulic valve is installed on a hydraulic support, and by controlling the opening and closing of the hydraulic valve, the hydraulic support can be made to move in an orderly manner.

[0003] The hydraulic valve is usually composed of a valve core assembly and a valve sleeve. The valve core assembly and the valve sleeve are connected through threads. During use, the valve core assembly and the valve sleeve may be stuck together during assembly and / or disassembly. In order to avoid the occurrence of sticking, the prior art usually adopts a differential design of the valve core assembly and the valve sleeve to solve the above problem. However, the differential design has high requirements for material selection and surface treatment process, has small selectivity, greatly increases the cost of products, and has poor economy.

[0004] Therefore, there is an urgent need in the prior art for a technical means that can economically solve the problem of easy sticking between the valve core assembly and the valve body. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the utility model is to provide an electro-hydraulic control reversing valve to solve the technical problem of being unable to economically solve the easy sticking between the valve core assembly and the valve body in the prior art.

[0006] In order to achieve the above purpose, the utility model provides an electro-hydraulic control reversing valve, which comprises a main valve, the main valve comprises a valve body and a valve core assembly, the valve core assembly is located in the valve body, at least a part of the valve core assembly can reciprocate in the valve body, the valve core assembly at least comprises a first valve sleeve, a second valve sleeve, a valve seat and a first screw sleeve, wherein the first valve sleeve is connected with the second valve sleeve, at least a part of the valve seat is located between the first valve sleeve and the second valve sleeve, and the first valve sleeve is detachably connected with the valve body through the first screw sleeve; an electromagnetic pilot valve is connected with the valve body in an integrated manner, and the on-off of the electromagnetic pilot valve is used to control the reversing of the reversing valve core.

[0007] Further, the first valve sleeve is provided with a first mounting portion at one end away from the second valve sleeve, the first mounting portion is connected with the valve body through the first screw sleeve, and the length of the first mounting portion is greater than or equal to the length of the first screw sleeve.

[0008] Further, the first valve sleeve comprises at least a first section and a second section, wherein an outer diameter of the first section is greater than an outer diameter of the second section, the first section is arranged away from the second valve sleeve relative to the second section, and an outer surface of the first section forms the first mounting portion.

[0009] Further, the electro-hydraulic control reversing valve further comprises a liquid inlet check valve and a liquid return check valve, and the liquid inlet check valve and the liquid return check valve are connected to the valve body through a second screw sleeve and a third screw sleeve respectively.

[0010] Further, the valve body is provided with a second accommodating cavity for accommodating the liquid inlet check valve and a third accommodating cavity for accommodating the liquid return check valve, the second accommodating cavity is provided with a second mounting groove matched with the second screw sleeve, and the third accommodating cavity is provided with a third mounting groove matched with the third screw sleeve.

[0011] Further, the valve core assembly further comprises a first valve core located in the first valve sleeve and capable of sliding in the first valve sleeve, at least a portion of the first valve core being capable of abutting against the valve seat; and a second valve core located in the second valve sleeve, the second valve core being sleeved with the first valve core, the second valve core being capable of sliding relative to the first valve core, and at least a portion of the second valve core being capable of abutting against the valve seat.

[0012] Further, the valve core assembly further comprises a spring sleeved on an outer periphery of the second valve core, two ends of the spring being respectively in abutment with at least a portion of the second valve core and the second valve sleeve, and the second valve core being in abutment with the valve seat under the bias of the spring.

[0013] Further, the first screw sleeve is a steel wire screw sleeve.

[0014] Further, the first valve sleeve and the second valve sleeve are integrally formed.

[0015] Further, the valve body has at least a first accommodating cavity for accommodating the valve core assembly, one end of the first accommodating cavity has a first threaded groove matched with the first screw sleeve, and a length of the first threaded groove is greater than or equal to a length of the first screw sleeve.

[0016] By arranging the first screw sleeve between the first valve sleeve and the valve body, the first valve sleeve is detachably connected to the valve body through the first screw sleeve, thereby avoiding direct connection between the first valve sleeve and the valve body, and further solving the problem of galling of the valve core assembly in the repeated disassembly and assembly process, reducing the risk of thread galling and scrapping, improving the reuse rate of parts, reducing the cost of product processing and maintenance, and improving the economy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 Shows a structural schematic diagram of the electro-hydraulic controlled reversing valve according to the utility model;

[0019] Figure 2 A schematic structural diagram of a valve core assembly of an electro-hydraulic controlled directional valve according to the present invention is shown;

[0020] Figure 3 The schematic structural diagram of the first screw sleeve of the electro-hydraulic controlled reversing valve according to the present utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 1. Main valve; 10. Valve body; 11. First accommodating chamber; 20. Valve core assembly; 21. First valve sleeve; 211. First mounting portion; 212. First section; 213. Second section; 22. Second valve sleeve; 23. Valve seat; 24. First screw sleeve; 25. First valve core; 26. Second valve core; 27. Spring; 2. Solenoid pilot valve. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0025] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0026] In order to solve the technical problem in the prior art that sticking easily occurs between the valve core assembly and the valve body, the utility model provides an electro-hydraulic controlled reversing valve.

[0027] like Figures 1 to 3The utility model provides an electro -hydraulic control reversing valve, including main valve 1 and electromagnetic pilot valve 2, wherein, the main valve 1 includes valve body 10 and valve core subassembly 20, valve core subassembly 20 is located in valve body 10, at least a portion of valve core subassembly 20 can reciprocate in valve body 10, thereby realizes the switching of different working cavities in valve body 10, valve core subassembly 20 at least includes first valve sleeve 21, second valve sleeve 22, valve seat 23 and first screw sleeve 24, wherein the first valve sleeve 21 is connected with second valve sleeve 22, at least a portion of valve seat 23 is located between first valve sleeve 21 and second valve sleeve 22, thereby the different chambers can be defined in first valve sleeve 21 and second valve sleeve 22 inside through valve seat 23, first valve sleeve 21 is detachably connected with valve body 10 through first screw sleeve 24, thereby can avoid first valve sleeve 21 with valve body 10 direct connection, electromagnetic pilot valve 2 is connected with valve body 10 integrally, and the on-off of electromagnetic pilot valve 2 is used to control the reversing of reversing valve valve core.

[0028] The electro -hydraulic control reversing valve provided by the utility model, by setting first screw sleeve 24 between first valve sleeve 21 and valve body 10, first valve sleeve 21 is detachably connected with valve body 10 through first screw sleeve 24, thereby avoid first valve sleeve 21 with valve body 10 direct connection, further solve the problem of sticking produced in the repeated disassembly and assembly process of valve core subassembly 20, reduce the risk of thread sticking and scrap, improve the reuse rate of parts and components, reduce the cost of product processing and maintenance, improve the economy of product.

[0029] Further, as shown in the drawings, the first valve sleeve 21 is provided with a first mounting portion 211 at one end away from the second valve sleeve 22, the first mounting portion 211 is connected with the valve body 10 through the first screw sleeve 24, and the length of the first mounting portion 211 is greater than or equal to the length of the first screw sleeve 24. Preferably, the first mounting portion 211 is an external thread arranged on the outer periphery of the first valve sleeve 21, and the first valve sleeve 21 is screwed with the first screw sleeve 24 through the external thread, so that the first valve sleeve 21 and the first screw sleeve 24 are fixedly connected. Such a structure layout is more conducive to the subsequent installation of the first valve sleeve 21. During installation, the combination of the first valve sleeve 21 and the first screw sleeve 24 can be installed into the valve body 10.

[0030] Specifically, the first valve sleeve 21 includes at least a first section 212 and a second section 213, wherein the outer diameter of the first section 212 is greater than the outer diameter of the second section 213, the first section 212 is arranged away from the second valve sleeve 22 relative to the second section 213, and the outer surface of the first section 212 forms the first mounting portion 211; by making the outer diameter of the first section 212 greater than the outer diameter of the second section 213, a stepped layout is formed on the outer circumferential surface of the first valve sleeve 21, which can be beneficial to the installation of the first valve sleeve 21 during use, and at the same time, it is also convenient to set a seal between the first valve sleeve 21 and the valve body 10 to realize the sealing of the electro-hydraulic control reversing valve.

[0031] Correspondingly, the valve body 10 has at least one first accommodating cavity 11 for accommodating the valve core assembly 20, and one end of the first accommodating cavity 11 has a first thread groove matching the first screw sleeve 24, and the length of the first thread groove is greater than or equal to the length of the first screw sleeve 24, thereby facilitating the threaded connection between the valve body 10 and the majority of the first screw sleeves 24.

[0032] Furthermore, the valve core assembly 20 also includes a first valve core 25 and a second valve core 26, wherein the first valve core 25 is located in the first valve sleeve 21 and can slide in the first valve sleeve 21, so that a chamber can be formed between the first valve sleeve 21 and the first valve core 25; at least a portion of the first valve core 25 can abut against the valve seat 23, and the second valve core 26 is located in the second valve sleeve 22, and the second valve core 26 is sleeved with the first valve core 25, and the second valve core 26 can slide relative to the first valve core 25, and at least a portion of the second valve core 26 can abut against the valve seat 23.

[0033] In order to achieve pressure control of the electro-hydraulic controlled reversing valve, the valve core assembly 20 also includes a spring 27, which is sleeved on the outer periphery of the second valve core 26. The two ends of the spring 27 are respectively in contact with the second valve core 26 and at least a portion of the second valve sleeve 22. The second valve core 26 is in contact with the valve seat 23 under the bias of the spring 27, thereby achieving valve reversing control by controlling the relationship between the elastic force of the spring 27 and the hydraulic pressure.

[0034] In order to facilitate replacement, the first threaded sleeve 24 can be, for example, a wire threaded sleeve. The use of a standardized wire threaded sleeve facilitates component replacement during product use and can effectively improve the versatility of product components.

[0035] In order to improve the strength of the valve core sleeve, the first valve sleeve 21 and the second valve sleeve 22 can also be integrally formed. While improving the strength of the valve core sleeve, it can also avoid the connection of multiple parts and save disassembly and assembly steps.

[0036] In other embodiments of the present invention, the electro-hydraulic controlled reversing valve may further include a liquid inlet one-way valve and a liquid return one-way valve, and the liquid inlet one-way valve and the liquid return one-way valve are connected to the valve body 10 via a second screw sleeve and a third screw sleeve respectively, thereby avoiding the liquid inlet one-way valve and the liquid return one-way valve being directly connected to the valve body 10.

[0037] Furthermore, the valve body 10 is provided with a second accommodating chamber for accommodating the liquid inlet one-way valve and a third accommodating chamber for accommodating the liquid return one-way valve, the second accommodating chamber is provided with a second mounting groove for matching the second screw sleeve, and the third accommodating chamber is provided with a third mounting groove for matching the third screw sleeve, the liquid inlet one-way valve and the liquid return one-way valve are respectively provided with external threads matching the second screw sleeve and the third screw sleeve, and the third mounting groove and the fourth mounting groove are provided with internal threads matching the second screw sleeve and the third screw sleeve; thereby, the installation of the liquid inlet one-way valve and the liquid return one-way valve is realized by the second screw sleeve and the third screw sleeve, effectively solving the problem of thread sticking between the valve body 10 and the components connected thereto, reducing the risk of thread sticking and scrapping, and improving the reuse rate of parts.

[0038] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0039] 1. Effectively solve the technical problem of sticking between the valve core assembly and the valve body in the existing technology;

[0040] 2. Simple structure and easy assembly reduce processing and manufacturing costs and improve product economy.

[0041] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0043] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electro-hydraulic controlled reversing valve, characterized in that: include: A main valve (1), the main valve (1) comprising a valve body (10) and a valve core assembly (20), the valve core assembly (20) being located in the valve body (10), at least a portion of the valve core assembly (20) being capable of reciprocating in the valve body (10), the valve core assembly (20) comprising at least a first valve sleeve (21), a second valve sleeve (22), a valve seat (23) and a first screw sleeve (24), wherein the first valve sleeve (21) is connected to the second valve sleeve (22), at least a portion of the valve seat (23) is located between the first valve sleeve (21) and the second valve sleeve (22), and the first valve sleeve (21) is detachably connected to the valve body (10) via the first screw sleeve (24); The electromagnetic pilot valve (2) is integrally connected to the valve body (10), and the on-off state of the electromagnetic pilot valve (2) is used to control the reversing of the spool of the reversing valve.

2. The electro-hydraulic controlled directional valve according to claim 1, characterized in that: A first mounting portion (211) is provided at one end of the first valve sleeve (21) away from the second valve sleeve (22), and the first mounting portion (211) is connected to the valve body (10) through the first screw sleeve (24), and the length of the first mounting portion (211) is greater than or equal to the length of the first screw sleeve (24).

3. The electro-hydraulic controlled reversing valve according to claim 2, characterized in that: The first valve sleeve (21) includes at least a first section (212) and a second section (213), wherein the outer diameter of the first section (212) is greater than the outer diameter of the second section (213), the first section (212) is arranged away from the second valve sleeve (22) relative to the second section (213), and the outer surface of the first section (212) forms the first mounting portion (211).

4. The electro-hydraulic controlled directional valve according to claim 1, characterized in that: The electro-hydraulic controlled reversing valve further comprises a liquid inlet check valve and a liquid return check valve, wherein the liquid inlet check valve and the liquid return check valve are connected to the valve body (10) via a second screw sleeve and a third screw sleeve, respectively.

5. The electro-hydraulic controlled directional valve according to claim 4, characterized in that: The valve body (10) is provided with a second accommodating chamber for accommodating the liquid inlet one-way valve and a third accommodating chamber for accommodating the liquid return one-way valve, the second accommodating chamber is provided with a second mounting groove for matching with the second screw sleeve, and the third accommodating chamber is provided with a third mounting groove for matching with the third screw sleeve.

6. The electro-hydraulic controlled directional valve according to claim 1, characterized in that: The valve core assembly (20) further includes: a first valve core (25), the first valve core (25) being located in the first valve sleeve (21) and being capable of sliding in the first valve sleeve (21), and at least a portion of the first valve core (25) being capable of abutting against the valve seat (23); A second valve core (26), wherein the second valve core (26) is located in the second valve sleeve (22), the second valve core (26) is sleeved with the first valve core (25), the second valve core (26) can slide relative to the first valve core (25), and at least a portion of the second valve core (26) can abut against the valve seat (23).

7. The electro-hydraulic controlled directional valve according to claim 6, characterized in that: The valve core assembly (20) further includes: A spring (27) is provided on the outer periphery of the second valve core (26), and two ends of the spring (27) are respectively in contact with the second valve core (26) and at least a portion of the second valve sleeve (22), and the second valve core (26) is in contact with the valve seat (23) under the bias of the spring (27).

8. The electro-hydraulic controlled directional valve according to any one of claims 1 to 6, characterized in that: The first screw sleeve (24) is a wire screw sleeve.

9. The electro-hydraulic controlled directional valve according to any one of claims 1 to 6, characterized in that: The first valve sleeve (21) and the second valve sleeve (22) are integrally formed.

10. The electro-hydraulic controlled directional valve according to any one of claims 1 to 6, characterized in that: The valve body (10) has at least one first accommodating cavity (11) for accommodating the valve core assembly (20), one end of the first accommodating cavity (11) has a first thread groove matching the first screw sleeve (24), and the length of the first thread groove is greater than or equal to the length of the first screw sleeve (24).

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