Large-flow electromagnetic directional valve

Abstract

The utility model provides a large-flow electromagnetic directional valve which comprises a main valve part and two electromagnets located at the two ends of the main valve part. The main valve part comprises a valve body, a valve body main hole is formed in the valve body, the valve body main hole comprises a valve element hole and two end cavities located at the two ends of the valve element hole, a valve element capable of axially moving is arranged in the valve element hole, each proportional electromagnet is provided with a protruding part inserted into the corresponding end cavity, and the protruding parts are connected with the valve element. And blind holes which are communicated with the valve element hole and extend in the axial direction are formed in the protruding part, the blind holes in the two ends are each internally provided with a reset spring, one end of each reset spring abuts against the end of the valve element, and the other end of each reset spring abuts against the bottom of the blind hole of the electromagnet. The large-flow electromagnetic directional valve is large in oil passing quantity, high in response speed and capable of responding to actions quickly in a short time, and working efficiency is improved; meanwhile, the direction of the fluid can be accurately controlled, and normal operation of the whole system is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic control valves, and in particular relates to a large-flow electromagnetic reversing valve. Background Art

[0002] Hydraulic transmission is a transmission method that uses liquid as the working medium to exchange, transfer and control energy. It has become an irreplaceable and important basic technology in the process of modernization of industry, agriculture, national defense and science and technology.

[0003] Hydraulic systems are usually composed of two parts: hydraulic components (including energy components, actuators, hydraulic control components, auxiliary components) and working media. Hydraulic control components have many specifications, wide application and flexibility. Through different combinations of hydraulic valves, various types of hydraulic systems can be formed. Hydraulic valves play an important role in hydraulic systems.

[0004] Figure 1-3 The traditional electromagnetic reversing valve structure, the corresponding valve body structure and the valve core structure in the hydraulic system are given. The traditional electromagnetic reversing valve structure has insufficient oil flow, low working pressure and high power consumption. If the oil flow of the electromagnetic reversing valve needs to be increased, the volume needs to be increased, thereby increasing the price of the electromagnetic reversing valve and reducing its applicability. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a large flow electromagnetic reversing valve with an improved structure.

[0006] To achieve the above purpose, the solution adopted by the utility model is as follows:

[0007] The utility model provides a large flow electromagnetic reversing valve, comprising a main valve part and two electromagnets located at both ends of the main valve part; wherein:

[0008] The main valve part comprises a valve body, a valve body main hole is provided in the valve body, the valve body main hole comprises a valve core hole and two end cavities located at both ends of the valve core hole, a valve core that can move axially is provided in the valve core hole, each proportional electromagnet is provided with a protrusion inserted into the end cavity, the protrusion is provided with an axially extending blind hole communicating with the valve core hole, a return spring is provided in the blind holes at both ends, one end of the return spring abuts against the end of the valve core, and the other end abuts against the bottom of the blind hole of the electromagnet;

[0009] A P chamber, an A chamber, a B chamber and two communicating T chambers are provided on the main hole of the valve body of the main valve part and between the two end chambers. Each of the P chamber, the A chamber, the B chamber and the two T chambers includes a chamber body extending radially along the main hole of the valve body, a circular arched upper chamber located at the upper end of the chamber body and a circular arched lower chamber located at the lower end of the chamber body. The diameter of the circular arched lower chamber and / or the circular arched upper chamber is greater than the width of the chamber body.

[0010] Preferably, an external thread is provided on the protrusions of the two electromagnets, and an internal thread is provided in the two end cavities of the valve body, and the valve body and the two proportional electromagnets are connected through the threads of the external thread and the internal thread; a push rod extending axially along the blind hole is provided on the electromagnet, and the reset spring is sleeved on the push rod.

[0011] Preferably, a first sealing ring is provided at the bottom of the protruding parts of the two electromagnets, at the position in contact with the valve body, to prevent oil from leaking out.

[0012] Preferably, an oil inlet P, an oil outlet T, a working oil port A and a working oil port B are provided on the valve body of the main valve part, the oil inlet P is connected with the P cavity of the valve core hole, and the working oil port A and the working oil port B are respectively connected with the A cavity and the B cavity of the valve core hole.

[0013] Preferably, a second sealing ring is provided at each position on the bottom surface of the valve body where the oil inlet P, oil outlet T, working oil port A and working oil port B are provided to prevent oil leakage from the oil inlet P, oil outlet T, working oil port A and working oil port B.

[0014] Preferably, the valve core includes a cylindrical stem and four sealing lips protruding from the stem, and the four sealing lips have the same diameter.

[0015] Preferably, a step is formed between the two sealing lips at the end of the valve core and the stem of the valve core, a gasket is provided on each of the two steps, and one end of the return spring abuts against the gasket.

[0016] Preferably, several circles of balancing grooves are provided on the outer circle of the four sealing lips of the valve core for storing tiny impurities in the oil, preventing the valve core from getting stuck in the valve core hole of the valve body, and reducing the wear of the valve core in the valve core hole of the valve body.

[0017] Preferably, it also includes a flow stabilizer assembly; a mounting hole for installing the flow stabilizer assembly is provided on the valve body, the mounting hole of the flow stabilizer assembly is connected to the blind hole at one end of the protrusion of the electromagnet, and the flow stabilizer assembly is provided with an inner hole, and a flow channel is connected between the inner hole and the blind hole at the other end of the protrusion of the electromagnet.

[0018] Preferably, the flow stabilizer assembly comprises a flow stabilizer sleeve, a flow stabilizer return spring and a flow stabilizer valve core, and the inner hole of the flow stabilizer assembly is located on the flow stabilizer sleeve and the flow stabilizer valve core.

[0019] Beneficial Effects

[0020] The utility model provides a large-flow electromagnetic reversing valve with a large oil flow rate and a fast response speed. It can respond to actions quickly in a short time and improve work efficiency. At the same time, it can accurately control the direction of the fluid to ensure the normal operation of the entire system. It has a wider range of uses and is suitable for a variety of hydraulic and pneumatic systems and various machines, such as engineering machinery, agricultural machinery, mining machinery, machine tools, etc. The electromagnetic reversing valve has a simple and compact structure, low coil power consumption, can effectively reduce operating costs, has a long service life, is easy to maintain, and can meet various needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an assembly cross-sectional view of the traditional electromagnetic reversing valve mentioned in the background technology of the utility model.

[0022] Figure 2 It is a cross-sectional view of the valve body of the traditional electromagnetic reversing valve mentioned in the background technology of the present utility model.

[0023] Figure 3 It is a structural schematic diagram of the valve core of a traditional electromagnetic reversing valve mentioned in the background technology of the present utility model.

[0024] Figure 4 The utility model is an assembly cross-sectional view of a large flow electromagnetic reversing valve.

[0025] Figure 5 The utility model is a cross-sectional view of the valve body of the large-flow electromagnetic reversing valve.

[0026] Figure 6 The utility model is a schematic diagram of the structure of the valve core of the large flow electromagnetic reversing valve.

[0027] Figure 7 It is an assembly cross-sectional view of another embodiment of the large-flow electromagnetic reversing valve involved in the utility model.

[0028] Figure 8 for Figure 7 Assembly cross-section view of the middle flow stabilizer assembly. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] To this end, the following solutions are proposed:

[0036] See also Figure 4 The utility model provides a large flow electromagnetic reversing valve, including a main valve part 100 and two electromagnets 200 located at both ends of the main valve part 100.

[0037] Specifically, the main valve part 100 includes a valve body 101, in which a valve body main hole 102 is opened, and the valve body main hole 102 includes a valve core hole 103 and two end cavities 104 located at both ends of the valve core hole 103, and a valve core 105 that can move axially is provided in the valve core hole 103, and each proportional electromagnet 200 is provided with a protrusion 201 inserted into the end cavity 104, and an axially extending blind hole 202 connected to the valve core hole 103 is provided in the protrusion 201, and a return spring 106 is provided in each of the blind holes 202 at both ends, and one end of the return spring 106 abuts against the end of the valve core 105, and the other end abuts against the bottom of the blind hole 202 of the electromagnet 200.

[0038] In some embodiments, an external thread is provided on the protrusion 201 of the two electromagnets 200, and an internal thread is provided in the two end cavities 104 of the valve body 101, and the valve body 101 is connected to the two proportional electromagnets 200 through the threads of the external thread and the internal thread; a push rod 203 extending axially along the blind hole 202 is provided on the electromagnet 200, and the reset spring 106 is sleeved on the push rod 203.

[0039] In the large flow electromagnetic reversing valve of the utility model, a P cavity, an A cavity, a B cavity and two communicating T cavities are further provided on the valve body main hole 102 of the main valve part 100 and between the two end cavities 104. An oil inlet P, an oil outlet T, a working oil port A and a working oil port B are provided at the bottom of the valve body 101 of the main valve part 100. The oil inlet P is communicated with the P cavity of the valve core hole 103, and the working oil port A and the working oil port B are communicated with the A cavity and the B cavity of the valve core hole 103 respectively.

[0040] In the large-flow electromagnetic reversing valve of the utility model, when the electromagnet 200 is energized, a control signal is input to generate a thrust on the push rod 203 of the electromagnet 200, which acts on the valve core 105 through the reset spring 106. By pushing the valve core 105 to move in the valve body main hole 102 of the valve body 101, the connection between the various oil ports on the valve body 101 and the flow channel can be achieved, thereby realizing the reversal of the oil.

[0041] In the large flow electromagnetic reversing valve of the utility model, as Figure 4 , Figure 5As shown, each of the P cavity, A cavity, B cavity and two T cavities on the valve body main hole 102 of the main valve part 100 includes a cavity body extending radially along the valve body main hole 102, a dome-shaped upper cavity located at the upper end of the cavity body and a dome-shaped lower cavity located at the lower end of the cavity body, and the diameter of the dome-shaped lower cavity and / or the dome-shaped upper cavity is greater than the width of the cavity body. Figure 5 In the design, the diameter of the arched lower cavity is greater than the width of the cavity body. Figure 1 , Figure 2 Compared with the structure of the traditional electromagnetic reversing valve and its valve body shown, the P chamber, A chamber, B chamber and two T chambers of the electromagnetic reversing valve of the utility model have larger flow channels, larger oil flow, faster response speed, and can respond quickly in a short time, thereby improving the working efficiency of the electromagnetic reversing valve.

[0042] In the large flow electromagnetic reversing valve of the utility model, as Figure 6 As shown, the valve core 105 located in the valve core hole 103 of the main valve part 100 includes a cylindrical stem 1051 and four sealing lips 1052 protruding from the stem 1051, and the four sealing lips 1052 have the same diameter. Figure 1 , Figure 3 Compared with the structure of the traditional electromagnetic reversing valve and its valve core shown in the figure, the diameter of the two sealing lips 1052 at both ends of the valve core 105 of the electromagnetic reversing valve of the utility model is the same as the diameter of the two sealing lips 1052 located in the middle, and the length of the two sealing lips 1052 at both ends in the axial direction is lengthened, so that the axial movement of the valve core 105 in the main hole 102 of the valve body of the main valve part 100 is smoother, and the direction of the fluid can be controlled more accurately, thereby better ensuring the normal operation of the entire system.

[0043] In some embodiments, a step 1053 is formed between the two sealing lips 1052 at the end of the valve core 105 and the stem 1051 of the valve core 105 , and a gasket 107 is provided on each of the two steps 1053 , and one end of the return spring 106 rests against the gasket 107 .

[0044] In some embodiments, a plurality of balancing grooves 1054 are provided on the outer circumference of the four sealing lips 1052 of the valve core 105. The balancing grooves 1054 have the following two functions: (1) to store tiny impurities in the oil to prevent the valve core from being stuck in the valve core hole of the valve body; and (2) to realize automatic centering of the valve core 105 in the valve core hole 103. Under the action of oil pressure, the oil film in the matching gap between the outer circumference of the valve core 105 and the valve body main hole 102 of the valve body 101 will become uniform, thereby reducing the wear of the valve core 105 in the valve body main hole 102 of the valve body 101 and reducing the internal leakage of the oil.

[0045] In the large flow electromagnetic reversing valve of the utility model, as Figure 4 As shown, a first sealing ring 108 is provided at the bottom of the protruding portion 201 of the two electromagnets 200, where the protruding portion 201 contacts the valve body 101, to prevent oil leakage. A second sealing ring 109 is provided at the bottom surface of the valve body 101, where the oil inlet P, the oil outlet T, the working oil port A and the working oil port B are provided, to prevent oil leakage from the oil inlet P, the oil outlet T, the working oil port A and the working oil port B.

[0046] During the use of the large flow electromagnetic reversing valve of the utility model, when not powered, the valve core 105 and the return spring 106 remain in the middle position, and the P chamber, T chamber, A chamber, and B chamber are all blocked. The power of the electromagnet 200 acts on the valve core 105 through the push rod 203, pushing it from the middle position to the right end position, which causes the oil to flow from P to B, and from A to T. The power of the electromagnet 200 acts on the valve core 105 through the push rod 203, pushing it from the middle position to the left end position, which causes the oil to flow from P to A, and from B to T. When the electromagnet 200 is powered off, the valve core 105 is pushed to the initial position by the return spring 106.

[0047] In one embodiment of the large flow electromagnetic reversing valve of the utility model, as Figure 4 As shown, the oil inlet P can also be equipped with a one-way valve. The oil enters from the oil inlet P, and after overcoming the opening pressure of the return spring 106, the one-way valve core moves, so that the oil flows into the P chamber. If there is a load pressure shock that makes the oil pressure in the P chamber higher than the pressure of the oil inlet P, because the one-way valve is closed, the reverse direction is cut off. At this time, the load pressure shock will not be transmitted to other parts of the hydraulic system through the oil inlet P, thereby avoiding shock pressure interference.

[0048] In another embodiment of the large flow electromagnetic reversing valve of the utility model, as Figure 7 As shown, the electromagnetic reversing valve may further include a flow stabilizer assembly 300. A mounting hole 110 for mounting the flow stabilizer assembly 300 is provided on the valve body 101, and the mounting hole 110 of the flow stabilizer assembly 300 is connected to the blind hole 202 at one end of the protrusion 201 of the electromagnet 200. The flow stabilizer assembly 300 has an inner hole 301, and a flow channel 302 is connected between the inner hole 301 and the blind hole 202 at the other end of the protrusion 201 of the electromagnet 200. Figure 8The figure shows an assembly cross-sectional view of the stabilizer assembly 300, which includes a stabilizer sleeve 303, a stabilizer return spring 304 and a stabilizer valve core 305. The inner hole 301 of the stabilizer assembly 300 is located on the stabilizer sleeve 303 and the stabilizer valve core 305. When the valve core 105 is pushed from the middle position to the right end position or the left end position, with the help of the stabilizer return spring 304 and the stabilizer valve core 305 of the stabilizer assembly 300, its inner hole 301 and the flow channel 302 connected with the blind holes 202 on both sides, the oil can achieve rapid pressure balance in the process from P to B, A to T or from P to A, B to T, so that the pressure of the oil outlet T can be stably and quickly maintained at a constant value.

[0049] The utility model provides a large-flow electromagnetic reversing valve with a large oil flow rate and a fast response speed. It can respond to actions quickly in a short time and improve work efficiency. At the same time, it can accurately control the direction of the fluid to ensure the normal operation of the entire system. It has a wider range of uses and is suitable for a variety of hydraulic and pneumatic systems and various machines, such as engineering machinery, agricultural machinery, mining machinery, machine tools, etc. The electromagnetic reversing valve has a simple and compact structure, low coil power consumption, can effectively reduce operating costs, has a long service life, is easy to maintain, and can meet various needs.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A large flow electromagnetic reversing valve, characterized in that: It includes a main valve part and two electromagnets located at both ends of the main valve part; wherein: The main valve part comprises a valve body, a valve body main hole is provided in the valve body, the valve body main hole comprises a valve core hole and two end cavities located at both ends of the valve core hole, a valve core that can move axially is provided in the valve core hole, each proportional electromagnet is provided with a protrusion inserted into the end cavity, the protrusion is provided with an axially extending blind hole communicating with the valve core hole, a return spring is provided in the blind holes at both ends, one end of the return spring abuts against the end of the valve core, and the other end abuts against the bottom of the blind hole of the electromagnet; A P chamber, an A chamber, a B chamber and two communicating T chambers are provided on the main hole of the valve body of the main valve part and between the two end chambers. Each of the P chamber, the A chamber, the B chamber and the two T chambers includes a chamber body extending radially along the main hole of the valve body, a circular arched upper chamber located at the upper end of the chamber body and a circular arched lower chamber located at the lower end of the chamber body. The diameter of the circular arched lower chamber and / or the circular arched upper chamber is greater than the width of the chamber body.

2. The large flow electromagnetic reversing valve according to claim 1, characterized in that: An external thread is provided on the protruding parts of the two electromagnets, and an internal thread is provided in the two end cavities of the valve body. The valve body and the two proportional electromagnets are connected through the threads of the external thread and the internal thread; a push rod extending along the axial direction of the blind hole is provided on the electromagnet, and the reset spring is sleeved on the push rod.

3. The large flow electromagnetic reversing valve according to claim 2, characterized in that: A first sealing ring is respectively arranged at the bottom of the protruding parts of the two electromagnets and at the position in contact with the valve body to prevent oil from leaking out.

4. The large flow electromagnetic reversing valve according to claim 1, characterized in that: An oil inlet P, an oil outlet T, a working oil port A and a working oil port B are provided on the valve body of the main valve part. The oil inlet P is connected to the P cavity of the valve core hole, and the working oil port A and the working oil port B are connected to the A cavity and the B cavity of the valve core hole respectively.

5. The large flow electromagnetic reversing valve according to claim 4, characterized in that: A second sealing ring is respectively provided at the positions of the oil inlet P, the oil outlet T, the working oil port A and the working oil port B on the bottom surface of the valve body to prevent the oil inlet P, the oil outlet T, the working oil port A and the working oil port B from leaking out.

6. The large flow electromagnetic reversing valve according to claim 1, characterized in that: The valve core includes a cylindrical stem and four sealing lips protruding from the stem, and the four sealing lips have the same diameter.

7. The large flow electromagnetic reversing valve according to claim 6, characterized in that: A step is formed between the two sealing lips at the end of the valve core and the stem of the valve core, and a gasket is respectively arranged on the two steps, and one end of the return spring abuts against the gasket.

8. The large flow electromagnetic reversing valve according to claim 6, characterized in that: Several circles of balancing grooves are arranged on the outer circles of the four sealing lips of the valve core, which are used to store tiny impurities in the oil, prevent the valve core from being stuck in the valve core hole of the valve body, and reduce the wear of the valve core in the valve core hole of the valve body.

9. The large flow electromagnetic reversing valve according to claim 1, characterized in that: It also includes a flow stabilizer assembly; a mounting hole for installing the flow stabilizer assembly is provided on the valve body, the mounting hole of the flow stabilizer assembly is connected to the blind hole at one end of the protrusion of the electromagnet, and an inner hole is provided on the flow stabilizer assembly, and a flow channel is connected between the inner hole and the blind hole at the other end of the protrusion of the electromagnet.

10. The large flow electromagnetic reversing valve according to claim 9, characterized in that: The flow stabilizer assembly comprises a flow stabilizer sleeve, a flow stabilizer return spring and a flow stabilizer valve core. The inner hole of the flow stabilizer assembly is located on the flow stabilizer sleeve and the flow stabilizer valve core.

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