Electromagnetic valve and hydraulic system

Abstract

The utility model provides an electromagnetic valve which comprises a valve body, a valve cavity is formed in the valve body, and a movable valve element is arranged in the valve cavity. The two ends of the valve body are further provided with magnetic conduction pipes respectively, moving irons used for pushing the valve element to move are further arranged in the magnetic conduction pipes respectively, spring cavities are further formed between the moving irons and the valve element respectively, and springs are further arranged in the spring cavities. The valve element is further provided with a plurality of oil ports, and the valve body is further provided with a plurality of unloading valves used for relieving pressure of the spring cavity. According to the electromagnetic valve of the structure, the moving iron is arranged at the two ends of the valve element respectively, the spring cavity is formed between the moving iron and the valve element, and meanwhile the unloading valves used for releasing pressure for the spring cavity are arranged on the valve body, so that compared with an electromagnetic valve of an existing structure, the electromagnetic valve has the advantages that the structure and control are relatively simple, the rated pressure is higher, and the service life is long. And the service life is longer. In addition, the utility model further provides a hydraulic system comprising the electromagnetic valve.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic machinery, in particular to a solenoid valve and a hydraulic system. Background Art

[0002] In recent years, with the continuous development of engineering technology, engineering machinery of various structures has been increasingly used in engineering construction, and my country has become the world's largest producer and seller of engineering machinery.

[0003] There are many types of construction machinery, such as excavators, pumping machinery, lifting machinery, and mining machinery. However, no matter what kind of construction machinery, it is almost inseparable from hydraulic systems of various structures. In the hydraulic system, the more important components include solenoid valves, including two-position four-way solenoid valves, three-position six-way solenoid valves, etc. When used, different working conditions are achieved in the continuous reversal of the solenoid valves. The three-position six-way solenoid valves that are currently used more often have problems such as relatively complex structure or control, low rated pressure, and short service life.

[0004] In summary, how to provide a solenoid valve with relatively simple structure and control, high rated pressure, and long service life, and a hydraulic machine including the solenoid valve, has become a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a solenoid valve with relatively simple structure and control, high rated pressure and long service life, and a hydraulic machine comprising the solenoid valve.

[0006] The solution of the utility model is implemented as follows: the utility model proposes a solenoid valve, including a valve body, a valve cavity is provided in the valve body, and a movable valve core is provided in the valve cavity; magnetic conductive tubes are provided at both ends of the valve body, and moving irons for pushing the valve core to move are provided in the magnetic conductive tubes, and spring cavities are provided between the moving irons and the valve core, and springs are provided in the spring cavities; a plurality of oil ports are provided on the valve core, and a plurality of unloading valves for relieving pressure from the spring cavity are provided on the valve body. The solenoid valve of this structure has the advantages of relatively simple structure and control, higher rated pressure, and longer service life by respectively providing moving irons at both ends of the valve core and providing a spring cavity between the moving iron and the valve core, and at the same time, providing a plurality of unloading valves for relieving pressure from the spring cavity on the valve body, compared with the solenoid valve of the existing structure.

[0007] Another technical solution of the utility model is that on the basis of the above, the magnetic conductive tube includes a first magnetic conductive tube arranged at one end of the valve core, and the moving iron includes a first moving iron, and the first moving iron is movably arranged in the first magnetic conductive tube.

[0008] Another technical solution of the utility model is that on the basis of the above, the spring chamber includes a first spring chamber arranged at one end of the valve core, and the spring includes a first spring, the first spring is arranged in the first spring chamber, one end of the first spring is abutted on the first moving iron, and the other end of the first spring is abutted on one end of the valve core.

[0009] Another technical solution of the utility model is that on the basis of the above, the magnetic conductive tube includes a second magnetic conductive tube arranged at the other end of the valve core, and the moving iron includes a second moving iron, and the second moving iron is movably arranged in the second magnetic conductive tube.

[0010] Another technical solution of the utility model is that on the basis of the above, the spring chamber includes a second spring chamber arranged at the other end of the valve core, the spring includes a second spring, the second spring is arranged in the second spring chamber, one end of the second spring is abutted on the second moving iron, and the other end of the second spring is abutted on the other end of the valve core.

[0011] Another technical solution of the utility model is that on the basis of the above, the unloading valve includes a first unloading valve and a second unloading valve, the second unloading valve is arranged on one side of the first unloading valve, and the first unloading valve and the second unloading valve are both connected to the valve cavity.

[0012] Another technical solution of the utility model is that on the basis of the above, a through hole is further provided in the middle of the valve core, and two ends of the through hole are respectively connected to the first spring chamber and the second spring chamber.

[0013] In addition, the utility model also proposes a hydraulic system, including a three-position six-way solenoid valve, and the three-position six-way solenoid valve is the solenoid valve as described above.

[0014] Another technical solution of the utility model is that on the basis of the above, the hydraulic system further includes a first oil cylinder and a second oil cylinder, and the first oil cylinder and the second oil cylinder are respectively connected to the three-position six-way solenoid valve.

[0015] Another technical solution of the utility model is that on the basis of the above, the hydraulic system further includes a multi-way valve for providing oil, and the multi-way valve is connected to the three-position six-way solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] Figure 1 It is a cross-sectional schematic diagram of a solenoid valve of the utility model;

[0018] Figure 2 The utility model is a structural schematic diagram of a hydraulic system.

[0019] The corresponding relationship of the reference numerals is:

[0020] 1 first nut 2 first magnetic tube 3 first coil

[0021] 4 first spring 5 valve core 6 through hole

[0022] 7 first gasket 8 second spring 9 second coil

[0023] 10 first plug 11 second nut 12 first electromagnet

[0024] 13 first spring chamber 14 first unloading valve 15 second unloading valve

[0025] 16 second plug 17 valve body 18 second spring chamber

[0026] 19 second gasket 20 first oil cylinder 21 second oil cylinder

[0027] 22 multi-way valve 23 second electromagnet 24 first moving iron

[0028] 25 second moving iron 26 second magnetic tube DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention. In addition, those skilled in the art can make corresponding combinations of the features in the embodiments and in different embodiments of the present invention according to the description of this document.

[0030] The utility model embodiments are as follows, see Figure 1 The solenoid valve shown in the figure specifically includes a valve body 17, in which a valve cavity is provided, and a valve core 5 that can move left and right is provided in the valve cavity. Magnetic conductive tubes are also provided at both ends of the valve body 17, and moving irons are also provided in the magnetic conductive tubes for pushing the valve core 5 to move, and spring cavities are also provided between the moving irons and the valve core 5, and a spring is also provided in the spring cavity. The valve core 5 is also provided with a number of oil ports, and the valve body 17 is also provided with a number of unloading valves for relieving pressure from the spring cavity. The solenoid valve of this structure can balance the pressure in the spring cavity more effectively by providing moving irons at both ends of the valve core 5, and providing a spring cavity between the moving iron and the valve core 5, and at the same time, providing a number of unloading valves for relieving pressure from the spring cavity on the valve body 17, so that the rated pressure of the solenoid valve is higher. Compared with the solenoid valve of the existing structure, it has the advantages of relatively simple structure and control, higher rated pressure and longer service life.

[0031] Based on the above embodiment, in another embodiment of the utility model, as Figure 1 As shown, the magnetic conductive tube includes a first magnetic conductive tube 2 arranged at one end of the valve core 5, namely the left end shown in the figure, and the moving iron includes a first moving iron 24, which is movably arranged in the first magnetic conductive tube 2.

[0032] Based on the above embodiment, in another embodiment of the utility model, as Figure 1 As shown, the spring chamber includes a first spring chamber 13 arranged at one end of the valve core 5, namely the left end shown in the figure, and the spring includes a first spring 4. The first spring 4 is arranged in the first spring chamber 13, and one end of the first spring 4, namely the left end shown in the figure, is abutted against the first moving iron 24, and the other end of the first spring 4, namely the right end shown in the figure, is abutted against the left end of the valve core 5.

[0033] Based on the above embodiment, in another embodiment of the utility model, as Figure 1 As shown, the magnetic conductive tube includes a second magnetic conductive tube 26 arranged at the other end of the valve core 5, that is, the right end shown in the figure, and the moving iron includes a second moving iron 25, and the second moving iron 25 is movably arranged in the second magnetic conductive tube 26.

[0034] Based on the above embodiment, in another embodiment of the utility model, as Figure 1 As shown, the spring chamber includes a second spring chamber 18 arranged at the other end of the valve core 5, namely the right end shown in the figure, and the spring includes a second spring 8. The second spring 8 is arranged in the second spring chamber 18, and one end of the second spring 8, namely the right end shown in the figure, is abutted against the second moving iron 25, and the other end of the second spring 8, namely the left end shown in the figure, is abutted against the other end of the valve core 5, namely the right end shown in the figure.

[0035] Based on the above embodiment, in another embodiment of the utility model, as Figure 1 As shown, the unloading valve includes a first unloading valve 14 and a second unloading valve 15. The second unloading valve 15 is arranged on one side of the first unloading valve 14, that is, the right side shown in the figure. The first unloading valve 14 and the second unloading valve 15 are both connected to the valve cavity, and the first unloading valve 14 and the second unloading valve 15 are both one-way unloading valves.

[0036] Based on the above embodiment, in another embodiment of the utility model, as Figure 1 As shown, a through hole 6 is further provided in the middle of the valve core 5 , and both ends of the through hole 6 are respectively connected to the first spring chamber 13 and the second spring chamber 18 . Through the through hole 6 , the oil pressure in the first spring chamber 13 and the second spring chamber 18 can be effectively balanced.

[0037] In addition, the solenoid valve also includes a first nut 1 and a second nut 11, a first coil 3 and a second coil 9, a first electromagnet 12 and a second electromagnet 23 arranged at both ends, a first gasket 7 and a second gasket 19 are also provided at both ends of the valve core 5, and a first plug 10 and a second plug 16 are also provided on the valve body 17. The specific structure and setting method can refer to the existing and improved technology, and will not be repeated here.

[0038] The solenoid valve of the above structure is provided with a first moving iron 24 and a second moving iron 25 at both ends of the valve core 5, and a first spring chamber 13 is provided between the first moving iron 24 and the valve core 5, and a second spring chamber 18 is provided between the second moving iron 25 and the valve core 5. At the same time, two first unloading valves 14 and second unloading valves 15 for relieving the pressure of the spring chamber are provided on the valve body 17, which can effectively balance the pressure in the first spring chamber 13 and the second spring chamber 18, so that the rated pressure of the solenoid valve is higher. Compared with the solenoid valve of the existing structure, it has the advantages of relatively simple structure and control, higher rated pressure and longer service life.

[0039] In addition, the utility model also proposes a hydraulic system, such as Figure 2 As shown, it includes a three-position six-way solenoid valve, and more specifically, the three-position six-way solenoid valve is the solenoid valve described above. The working positions of the three-position six-way solenoid valve include left position, middle position and right position, and the oil ports of the three-position six-way solenoid valve include P1 oil port, P2 oil port, C1 oil port, C2 oil port, C3 oil port and C4 oil port.

[0040] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 As shown, the hydraulic system further includes a first oil cylinder 20 and a second oil cylinder 21, and the first oil cylinder 20 and the second oil cylinder 21 are respectively connected to the three-position six-way solenoid valve.

[0041] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 As shown, the hydraulic system also includes a multi-way valve 22 for providing oil, the multi-way valve 22 is connected to the three-position six-way solenoid valve through a pipeline, and the multi-way valve 22 is also provided with an A oil port and a B oil port. For the specific structure and setting method of the multi-way valve 22, reference can be made to the existing and improved technologies, and no further description is given here.

[0042] During operation, when the power is off, the three-position six-way solenoid valve works in the middle position. Figure 2As shown, the oil from the multi-way valve 22 can be in the middle position of the solenoid valve, and can simultaneously control the operation of the first oil cylinder 20 and the second oil cylinder 21. When the left end of the three-position six-way solenoid valve is energized, the left position of the three-position six-way solenoid valve works, and the oil from the multi-way valve 22 can be in the left position of the solenoid valve, and can realize the control of the second oil cylinder 21. When the right end of the three-position six-way solenoid valve is energized, the right position of the three-position six-way solenoid valve works, and the oil from the multi-way valve 22 can be in the right position of the solenoid valve, and can realize the control of the first oil cylinder 20.

[0043] For the first unloading valve 14 and the second unloading valve 15, as Figure 2 As shown, when working, when the P1 end is the oil inlet end, the first unloading valve 14 is in the cut-off state, at this time, the first spring chamber 13 and the second spring chamber 18 unload the internal pressure to the P2 oil circuit through the second unloading valve 15. Conversely, when the P2 end is the oil inlet end, the first spring chamber 13 and the second spring chamber 18 unload the internal pressure to the P2 oil circuit through the first unloading valve 14.

[0044] The hydraulic system of this structure accordingly has the advantages possessed by the above-mentioned solenoid valve.

[0045] 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 solenoid valve, characterized in that: It comprises a valve body, wherein a valve cavity is arranged in the valve body, and a movable valve core is arranged in the valve cavity; Both ends of the valve body are provided with magnetic conductive tubes, each of which is provided with a moving iron for pushing the valve core to move, and a spring cavity is provided between the moving iron and the valve core, each of which is provided with a spring; The valve core is also provided with a plurality of oil ports, and the valve body is also provided with a plurality of unloading valves for relieving pressure of the spring chamber.

2. The solenoid valve according to claim 1, characterized in that: The magnetic conductive tube includes a first magnetic conductive tube arranged at one end of the valve core, and the moving iron includes a first moving iron, and the first moving iron is movably arranged in the first magnetic conductive tube.

3. The solenoid valve according to claim 2, characterized in that: The spring cavity includes a first spring cavity arranged at one end of the valve core, and the spring includes a first spring, which is arranged in the first spring cavity, one end of the first spring abuts against the first moving iron, and the other end of the first spring abuts against one end of the valve core.

4. The solenoid valve according to claim 3, characterized in that: The magnetic conductive tube includes a second magnetic conductive tube arranged at the other end of the valve core, and the moving iron includes a second moving iron, and the second moving iron is movably arranged in the second magnetic conductive tube.

5. The solenoid valve according to claim 4, characterized in that: The spring cavity includes a second spring cavity arranged at the other end of the valve core, and the spring includes a second spring, which is arranged in the second spring cavity, one end of the second spring abuts against the second moving iron, and the other end of the second spring abuts against the other end of the valve core.

6. The solenoid valve according to claim 5, characterized in that: The unloading valve includes a first unloading valve and a second unloading valve, wherein the second unloading valve is disposed at one side of the first unloading valve, and both the first unloading valve and the second unloading valve are communicated with the valve cavity.

7. The solenoid valve according to claim 6, characterized in that: A through hole is also provided in the middle of the valve core, and two ends of the through hole are respectively communicated with the first spring chamber and the second spring chamber.

8. A hydraulic system, comprising a three-position six-way solenoid valve, characterized in that: The three-position six-way solenoid valve is the solenoid valve according to any one of claims 1 to 7.

9. The hydraulic system according to claim 8, characterized in that: The hydraulic system further includes a first oil cylinder and a second oil cylinder, wherein the first oil cylinder and the second oil cylinder are respectively connected to the three-position six-way solenoid valve.

10. The hydraulic system according to claim 8, characterized in that: The hydraulic system further comprises a multi-way valve for providing oil, wherein the multi-way valve is in communication with the three-position six-way solenoid valve.

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