Two-position four-way proportional reversing valve

Abstract

The utility model provides a two-position four-way proportional directional valve, and belongs to the technical field of hydraulic engineering control elements. The four-way reversing valve solves the problem that an existing four-way reversing valve is small in application range. The two-position four-way proportional reversing valve comprises a shell, a support, a piston body, a movable iron core block, a coil and a valve body, an oil inlet hole, an oil return hole, a first oil outlet hole and a second oil outlet hole are formed in the valve body, the movable iron core block is sleeved with a flux sleeve, the inner wall of the flux sleeve is provided with a blocking shoulder protruding inwards in the radial direction, an ejector rod fixedly connected with the movable iron core block is arranged in the blocking shoulder in a penetrating mode, and a first spring is arranged in the flux sleeve. A first spring is arranged in the valve body, a second spring is arranged in the valve body, the second spring provides elastic force to enable the piston body to abut against the movable iron core block all the time, and the elastic force of the first spring is larger than that of the second spring to enable the movable iron core block to have the trend of abutting against the end, inserted into the support, of the valve body. And the oil outlet hole II is communicated with the oil return hole. The device has the advantages of convenience in manufacturing, wide application range and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic engineering control elements and relates to a reversing valve, in particular to a two-position four-way proportional reversing valve. Background Art

[0002] The solenoid reversing valve is a device that uses electromagnetic force to control mechanical movement. It controls the movement of the valve core through the electromagnet to achieve fluid reversal and control.

[0003] The structure of the two-position four-way reversing valve in the prior art is as follows: Figure 1 As shown, it includes a housing 001, a static iron core 002, a moving iron core 003, an integrated coil 004, a support sleeve 005, a valve body 006 and a piston 007. The valve body 006 is provided with an oil inlet 008, an oil return port 009, an oil outlet 1 010 and an oil outlet 2 011. One end of the support sleeve 005 is fixedly connected to the housing 001, and the other end of the support sleeve 005 is fixedly connected to the valve body 006. The housing 001 is sequentially installed with a static iron core 002, a spring 012 and a moving iron core 003 from the inside to the outside. The piston 007 is located at the valve body 006. 06 and the end of the piston 007 is clamped with the moving iron core 002, the piston 007 has a radially outwardly protruding shoulder 013, the inner wall of the connection end of the valve body 006 and the support sleeve 005 has a step 014, the integrated coil 004 is sleeved on the outside of the static iron core 002 and the moving iron core 003, the spring 012 provides elastic force so that the shoulder 013 of the piston 007 always has a tendency to contact the step 014, that is, the oil inlet 008 is connected with the oil outlet 1 010, and the oil outlet 2 011 is connected with the oil return port 009.

[0004] When the two-position four-way reversing valve of the prior art is used, the electromagnetic force overcomes the elastic force of the spring 012, and the moving iron core 003 quickly contacts the static iron core 002, and the moving iron core 003 drives the piston 007 to move axially, so that the oil outlet 1 010 is connected to the oil return port 009, and the oil outlet 2 011 is connected to the oil inlet. That is, the existing two-position four-way reversing valve can only realize oil outlet from one of the oil outlet 1 010 or the oil outlet 2 011, and cannot realize oil outlet from both at the same time, and cannot control the oil flow and load speed of the oil outlet 1 010 and the oil outlet 2 011. The scope of application is small and cannot meet the actual needs of customers. In addition, the end of the moving iron core 003 needs to be processed with a socket, and the end of the piston 007 needs to be processed with an insertion end, which is inconvenient to process. Summary of the invention

[0005] The utility model aims to solve the above problems in the prior art and provides a two-position four-way proportional reversing valve which is easy to manufacture, can control the flow rate of two oil outlets and the load speed, and has a wide range of applications.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a two-position four-way proportional reversing valve, including a shell, a bracket, a piston body, a moving iron core block, a coil and a valve body, the valve body is provided with an oil inlet hole, an oil return hole, an oil outlet hole 1 and an oil outlet hole 2, characterized in that the moving iron core block is covered with a magnetic sleeve, the coil is sleeved on the outside of the magnetic sleeve, the shell covers the coil, the end of the magnetic sleeve extending out of the shell is covered with a bracket, the end of the valve body is inserted into the bracket and fixedly connected to the bracket, the inner wall of the magnetic sleeve has a radially inwardly convex shoulder, the moving iron core block is located at the shoulder The shoulder is between the ends of the valve body inserted into the bracket, a push rod fixedly connected to the moving iron core block is passed through the shoulder, a spring 1 is provided in the magnetic sleeve to provide elastic force for the push rod, and a spring 2 is provided in the end of the valve body away from the moving iron core block. The spring 2 provides elastic force so that the piston body always contacts the moving iron core block. The elastic force of the spring 1 is greater than the elastic force of the spring 2, so that the moving iron core block has a tendency to contact the end of the valve body inserted into the bracket. When the moving iron core block contacts the end of the valve body inserted into the bracket, the oil inlet hole is connected with the oil outlet hole 1, and the oil outlet hole 2 is connected with the oil return hole.

[0007] In the above-mentioned two-position four-way proportional directional control valve, an annular sealing gasket is provided between the magnetic conductive sleeve and the end of the piston body, and the sealing gasket has a supporting portion for the moving iron core block to abut.

[0008] In the above-mentioned two-position four-way proportional reversing valve, the magnetic sleeve is threadedly connected with a plug, the end of the push rod facing the spring one is threadedly connected with a spring seat, one end of the spring one abuts against the plug, and the other end of the spring one is inserted into the spring seat and abuts against the convex shoulder of the spring seat.

[0009] In the above-mentioned two-position four-way proportional reversing valve, the shell is fixedly connected with an end cover in which the plug and the magnetic conductive sleeve are arranged, and a sealing ring is arranged between the end cover and the magnetic conductive sleeve.

[0010] In the above-mentioned two-position four-way proportional directional control valve, a sealing ring 2 is provided between the magnetic sleeve and the bracket.

[0011] In the above-mentioned two-position four-way proportional reversing valve, a retaining spring is embedded in the inner wall of the valve body, and the retaining spring supports an annular support pad toward the end face of the spring 2. One end of the spring 2 abuts against the support pad, and the other end of the spring 2 abuts against the piston body.

[0012] In the above-mentioned two-position four-way proportional reversing valve, the housing is riveted to the end cover, and the bracket is riveted to the valve body.

[0013] Compared with the prior art, the two-position four-way proportional reversing valve can control the oil flow rate of oil outlet hole one and oil outlet hole two, which is convenient for adjusting the load speed of the two oil outlet oil circuits, has a wide range of applications, good sealing performance, and a long service life. The moving iron core block and the piston body are manufactured separately, which is convenient to manufacture and has high processing precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural cross-sectional view of a two-position four-way reversing valve in the prior art.

[0015] Figure 2 It is a structural cross-sectional view of the present two-position four-way proportional directional valve.

[0016] In the figure, 001, shell; 002, static iron core; 003, moving iron core; 004, integrated coil; 005, support sleeve; 006, valve body; 007, piston; 008, oil inlet; 009, oil return port; 010, oil outlet one; 011, oil outlet two; 012, spring; 013, shoulder; 014, step; 1, shell; 2, bracket; 3, piston body; 4, moving iron core block; 5, coil; 6, valve body; 7, oil inlet hole; 8, oil return hole; 9, oil outlet one; 10, oil outlet two; 11, magnetic sleeve; 111, shoulder; 12, push rod; 13, spring one; 14, spring two; 15, sealing gasket; 16, plug; 17, spring seat; 18, end cover; 19, sealing ring one; 20, sealing ring two; 21, retaining ring; 22, support pad. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 2 As shown, the two-position four-way proportional reversing valve comprises a housing 1, a bracket 2, a piston body 3, a moving iron core block 4, a coil 5 and a valve body 6. The valve body 6 is provided with an oil inlet hole 7, an oil return hole 8, an oil outlet hole 1 9 and an oil outlet hole 2 10. The moving iron core block 4 is covered with a magnetic sleeve 11, and the coil 5 is sleeved on the outside of the magnetic sleeve 11. The housing 1 covers the coil 5. The end of the magnetic sleeve 11 extending out of the housing 1 is covered with a bracket 2. The end of the valve body 6 is inserted into the bracket 2 and is fixedly connected to the bracket 2. The inner wall of the magnetic sleeve 11 has a radially inwardly convex shoulder 111. The moving iron core block 4 is located between the shoulder 111 and the end of the valve body 6 inserted into the bracket 2. A push rod 12 fixedly connected to the moving iron core block 4 is passed through the shoulder 111, a spring 13 is provided in the magnetic sleeve 11 to provide elastic force for the push rod 12, and a spring 2 14 is provided in the end of the valve body 6 away from the moving iron core block 4. The spring 2 14 provides elastic force so that the piston body 3 always contacts the moving iron core block 4. The elastic force of the spring 13 is greater than the elastic force of the spring 2 14, so that the moving iron core block 4 has a tendency to contact the end of the valve body 6 inserted into the bracket 2. When the moving iron core block 4 contacts the end of the valve body 6 inserted into the bracket 2, the oil inlet hole 7 is connected with the oil outlet hole 1 9, and the oil outlet hole 2 10 is connected with the oil return hole 8.

[0019] The magnetic sleeve 11 in the two-position four-way proportional reversing valve has the function of a static iron core, and the elastic force of spring one 13 is equal to the electromagnetic force plus the elastic force of spring two 14; during use, the coil 5 is energized, and the electromagnetic force causes the moving iron core block 4 to be driven by the push rod 12 to move axially away from the piston body 3 in the magnetic sleeve 11, and the piston body 3 still contacts the piston body 3 under the elastic force of spring two 14. By controlling the size of the current energized by the coil 5, when the elastic force of spring one 13 and the electromagnetic force and the elastic force of spring two 14 reach a balance, the piston body 3 can stop moving in the valve body 6, that is, the piston body 3 is in a state of intermediate pause, so that the oil flow rate of oil outlet hole one 9 and oil outlet hole two 10 can be controlled, which is convenient for regulating the load speed of the two oil outlet oil circuits and has a wide range of applications; the moving iron core block 4 and the piston body 3 are manufactured separately, which is convenient to manufacture and has high processing accuracy.

[0020] In further detail, an annular sealing gasket 15 is provided between the magnetic sleeve 11 and the end of the piston body 3, and the sealing gasket 15 has abutting portion for the moving iron core block 4 to abut. The sealing gasket 15 not only ensures the sealing between the magnetic sleeve 11 and the end of the piston body 3, but also provides a buffer for the moving iron core block 4, avoids noise, and prolongs the service life.

[0021] The magnetic sleeve 11 is threadedly connected with a plug 16, and the end of the push rod 12 facing the spring 13 is threadedly connected with a spring seat 17, one end of the spring 13 abuts against the plug 16, and the other end of the spring 13 is inserted into the spring seat 17 and abuts against the convex shoulder of the spring seat 17. By rotating the plug 16, the compression amount of the spring 13 can be changed, so that it is convenient to set the elastic force of the spring 13 according to customer needs, which is easy to operate, high in precision and good in adaptability. In this embodiment, the magnetic sleeve 11 is threadedly connected to the plug 16 through an internal thread.

[0022] The housing 1 is fixedly connected with an end cover 18 that covers the plug 16 and the magnetic sleeve 11, and a sealing ring 19 is provided between the end cover 18 and the magnetic sleeve 11. The end cover 18 protects the plug 16 and the magnetic sleeve 11 from damage and prevents manual readjustment of the plug 16, thereby ensuring the accuracy of the product when in use. The sealing ring 19 ensures the sealing between the end cover 18 and the magnetic sleeve 11.

[0023] A sealing ring 20 is provided between the magnetic sleeve 11 and the bracket 2, and the sealing ring 20 ensures the sealing between the magnetic sleeve 11 and the bracket 2. A retaining spring 21 is embedded in the inner wall of the valve body 6, and the retaining spring 21 supports a ring-shaped support pad 22 facing the end surface of the spring 14. One end of the spring 14 abuts against the support pad 22, and the other end of the spring 14 abuts against the piston body 3, so that the spring 14 is easy to install.

[0024] The housing 1 is riveted to the end cover 18, and the bracket 2 is riveted to the valve body 6. This has good connection firmness, high coaxiality, and convenient processing.

[0025] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A two-position four-way proportional directional valve, comprising a housing (1), a bracket (2), a piston body (3), a moving iron core block (4), a coil (5) and a valve body (6), wherein the valve body (6) is provided with an oil inlet hole (7), an oil return hole (8), a first oil outlet hole (9) and a second oil outlet hole (10), characterized in that: The movable iron core block (4) is covered with a magnetic sleeve (11), the coil (5) is sleeved on the outside of the magnetic sleeve (11), the shell (1) covers the coil (5), the end of the magnetic sleeve (11) extending out of the shell (1) is covered with a bracket (2), the end of the valve body (6) is inserted into the bracket (2) and is fixedly connected to the bracket (2), the inner wall of the magnetic sleeve (11) has a radially inwardly convex shoulder (111), the movable iron core block (4) is located between the shoulder (111) and the end of the valve body (6) inserted into the bracket (2), the shoulder (111) is penetrated by a push rod (12) fixedly connected to the movable iron core block (4), and the magnetic sleeve ( A spring 1 (13) is provided inside the valve body (11) for providing elastic force for the push rod (12); a spring 2 (14) is provided inside the end of the valve body (6) away from the movable iron core block (4); the spring 2 (14) provides elastic force so that the piston body (3) always contacts the movable iron core block (4); the elastic force of the spring 1 (13) is greater than the elastic force of the spring 2 (14) so ​​that the movable iron core block (4) has a tendency to contact the end of the valve body (6) inserted into the bracket (2); when the movable iron core block (4) contacts the end of the valve body (6) inserted into the bracket (2), the oil inlet hole (7) is connected to the oil outlet hole 1 (9), and the oil outlet hole 2 (10) is connected to the oil return hole (8).

2. A two-position four-way proportional directional valve according to claim 1, characterized in that: An annular sealing gasket (15) is provided between the magnetic conductive sleeve (11) and the end of the piston body (3), and the sealing gasket (15) has a supporting portion for the moving iron core block (4) to abut against.

3. A two-position four-way proportional directional valve according to claim 2, characterized in that: The magnetic conductive sleeve (11) is threadedly connected to a plug (16), and the end of the push rod (12) facing the spring one (13) is threadedly connected to a spring seat (17), one end of the spring one (13) abuts against the plug (16), and the other end of the spring one (13) is inserted into the spring seat (17) and abuts against a convex shoulder of the spring seat (17).

4. A two-position four-way proportional directional valve according to claim 3, characterized in that: The housing (1) is fixedly connected to an end cover (18) which houses the plug (16) and the magnetic conductive sleeve (11), and a sealing ring (19) is provided between the end cover (18) and the magnetic conductive sleeve (11).

5. A two-position four-way proportional directional valve according to claim 4, characterized in that: A second sealing ring (20) is provided between the magnetic conductive sleeve (11) and the bracket (2).

6. A two-position four-way proportional directional valve according to claim 5, characterized in that: A retaining spring (21) is embedded in the inner wall of the valve body (6), and the retaining spring (21) supports an annular support pad (22) facing the end surface of the second spring (14). One end of the second spring (14) abuts against the support pad (22), and the other end of the second spring (14) abuts against the piston body (3).

7. A two-position four-way proportional directional valve according to claim 6, characterized in that: The housing (1) is riveted to the end cover (18), and the bracket (2) is riveted to the valve body (6).

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