Electromagnetic valve and hydraulic system

Abstract

The utility model provides an electromagnetic valve which comprises a valve body, a first electromagnet and a second electromagnet are arranged at the two ends of the valve body respectively, a valve cavity is formed in the valve body, a movable valve element is arranged in the valve cavity, a through hole penetrating through the valve element is formed in the valve element, and the two ends of the through hole are communicated with the valve cavity. A plurality of pressure oil ports communicated with the valve cavity are formed in one side of the valve body, an oil inlet communicated with the valve cavity is formed in the other side of the valve body, and a plurality of signal ports used for feeding back load information are formed in one side of the oil inlet. According to the electromagnetic valve of the structure, the through hole which is communicated with the valve cavity and penetrates through the valve element is formed in the valve element. In the working process, when the valve element is in the power-on reversing moment and the power-off resetting moment, under the action of the through hole, impact is small, and operation is more stable. Meanwhile, the signal port is directly formed in the valve body, the structure is simpler, and the use cost is lower. In addition, the utility model further provides a hydraulic system.

Description

Technical Field

[0001] This utility model relates to the field of hydraulics, and in particular to a solenoid valve and a hydraulic system. Background Technology

[0002] In recent years, with the continuous development of hydraulic technology, valves of various structures, such as solenoid valves, have been increasingly widely used in various hydraulic systems.

[0003] Solenoid valves, as automated components that control the on / off state or flow direction of fluids (liquids or gases) through electromagnetic force, are widely used in industries such as manufacturing, automotive, and home appliances. Classified by media type, they can be divided into pneumatic solenoid valves and hydraulic solenoid valves. Classified by ports and number of positions, they can be divided into 2-position 2-way, 2-position 3-way, 3-position 4-way, and 3-position 5-way types. For the widely used hydraulic solenoid valves, the valve core and other connected hydraulic components are prone to significant impact during the energization-switching and de-energization-reset moments, thus affecting their service life. Furthermore, the load signal is usually taken from the pressure port and provided to the main pump, making the structure more complex and leading to higher operating costs.

[0004] In summary, how to provide a solenoid valve that is simple in structure, practical, low in cost, has less impact, and operates more smoothly, as well as a hydraulic system including this solenoid valve, has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a solenoid valve with a simple and practical structure, low cost, less impact, and smoother operation, as well as a hydraulic system including this solenoid valve.

[0006] The solution of this utility model is implemented as follows: This utility model proposes a solenoid valve, including a valve body, with a first electromagnet and a second electromagnet respectively located at both ends of the valve body. A valve cavity is formed within the valve body, and a movable valve core is located within the valve cavity. A through-hole is formed through the valve core, with both ends of the through-hole communicating with the valve cavity. Several pressure oil ports communicating with the valve cavity are located on one side of the valve body, and an oil inlet communicating with the valve cavity is located on the other side of the valve body. Several signal ports for feedback load information are located on one side of the oil inlet. This solenoid valve structure, by having a through-hole communicating with the valve cavity on the valve core and several signal ports for feedback load information directly on the valve body, allows the pressure at both ends of the valve core to be relatively balanced under the action of the through-hole during operation. Therefore, the impact is smaller and the operation is more stable. At the same time, directly placing the signal ports on the valve body simplifies the structure and reduces operating costs.

[0007] Another technical solution of this utility model is that, based on the above, the pressure port includes a first pressure port and a second pressure port disposed on one side of the first pressure port.

[0008] Another technical solution of this utility model is that, based on the above, the signal port includes a first signal port, which is disposed on one side of the oil inlet.

[0009] Another technical solution of this utility model is that, based on the above, the signal port further includes a second signal port, which is located on the side of the oil inlet opposite to the first signal port.

[0010] Another technical solution of this utility model is that, based on the above, the valve block is further provided with a plurality of oil return ports that can communicate with the valve cavity, and the oil return ports are located on one or both sides of the oil inlet.

[0011] Another technical solution of this utility model is that, based on the above, the valve core is further provided with a first spring cavity at one end near the first electromagnet, the first spring cavity is provided with a first spring, one end of the first spring abuts against the first electromagnet, and the other end of the first spring abuts against one end of the valve core.

[0012] Another technical solution of this utility model is that, based on the above, the valve core is further provided with a second spring cavity at one end near the second electromagnet, and a second spring is provided in the second spring cavity. One end of the second spring abuts against the second electromagnet, and the other end of the second spring abuts against the other end of the valve core.

[0013] Another technical solution of this utility model is that, based on the above, the valve block is further provided with a plurality of connecting holes for connecting purposes, and the connecting holes are provided with detachable connecting parts; the valve block is also provided with positioning pins for positioning purposes, and the positioning pins are disposed on one side of the connecting parts.

[0014] Another technical solution of this utility model is that, based on the above, the solenoid valve is a three-position five-way solenoid directional valve.

[0015] In addition, this utility model also proposes a hydraulic system, including a solenoid valve, wherein the solenoid valve is the solenoid valve described above. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1This is a three-dimensional structural diagram of an electromagnetic valve according to the present invention;

[0018] Figure 2 for Figure 1 A top view of the object when it is upright;

[0019] Figure 3 for Figure 2 Schematic sectional view along the middle AA direction;

[0020] Figure 4 for Figure 1 A schematic diagram of the internal structure of a solenoid valve.

[0021] The correspondence between the reference numerals in the attached figures is as follows:

[0022] 1. First electromagnet 2. First spring 3. First washer

[0023] 4 Valve block 5 Sealing ring 6 Valve core

[0024] 7 screws, 8 locating pins, 9 through holes

[0025] 10 Second washer 11 Second spring 12 Second electromagnet

[0026] 13 Valve chamber 14 First pressure port 15 Second pressure port

[0027] 16 First spring cavity 17 First oil return port 18 First signal port

[0028] 19 Oil inlet 20 Second signal port 21 Second return port

[0029] 22 Second spring cavity Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings. This description is merely illustrative and explanatory, and should not be construed as limiting the scope of protection of the present invention. Furthermore, those skilled in the art can combine the features in the embodiments described herein and in different embodiments according to the description in this document.

[0031] The embodiments of this utility model are as follows, please refer to them. Figures 1 to 4 The solenoid valve shown specifically includes a valve body, with a first electromagnet 1 and a second electromagnet 12 respectively located at its left and right ends. A valve cavity 13 is formed within the valve body, and a valve core 6, movable left and right within the valve cavity 13, is located therein. A through hole 9 is also formed inside the valve core 6, and both ends of the through hole 9 communicate with the valve cavity 13. One side of the valve body, namely... Figure 3 and Figure 4The upper side of the valve body, as shown, has several pressure oil ports communicating with the valve chamber 13. On the other side of the valve body, the lower side shown in the figure, there is an oil inlet 19 communicating with the valve chamber 13. Several signal ports for feedback load information are also provided on one side of the oil inlet 19. This solenoid valve structure utilizes a through-hole 9 on the valve core 6, communicating with the valve chamber 13, and several signal ports for feedback load information are directly provided on the valve body. During operation, when the valve core 6 is energized for reversal and de-energized for reset, the pressure at both ends of the valve core 6 can be relatively balanced under the action of the through-hole 9, resulting in less impact and smoother operation. Furthermore, directly providing signal ports on the valve body simplifies the structure and reduces operating costs.

[0032] Based on the above embodiments, in another embodiment of the present invention, such as Figure 2 and Figure 4 As shown, the pressure port specifically includes a first pressure port 14 and a second pressure port 15 located on one side of the first pressure port 14, i.e., the right side shown in the figure. During operation, the first pressure port 14 and the second pressure port 15 are used to connect to the oil ports of other components and to supply pressure oil to other oil ports.

[0033] Based on the above embodiments, in another embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the signal port specifically includes a first signal port 18, which is located on one side of the oil inlet 19, i.e., the left side shown in the figure.

[0034] Based on the above embodiments, in another embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the signal port also includes a second signal port 20, which has an oil inlet 19 on the side opposite to the first signal port 18, i.e., the right side shown in the figure.

[0035] Based on the above embodiments, in another embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the valve block 4 is also provided with several oil return ports that can communicate with the valve chamber 13. The oil return ports are located on one or both sides of the oil inlet 19. More specifically, the oil return ports include a first oil return port 17 and a second oil return port 21, which are respectively located on the left and right sides of the oil inlet 19.

[0036] Based on the above embodiments, in another embodiment of the present invention, such as Figure 3 and Figure 4As shown, the valve core 6 is provided with a first spring cavity 16 at one end near the first electromagnet 1, i.e., the left end shown in the figure. The first spring cavity 16 is provided with a first spring 2. One end of the first spring 2, i.e., the left end shown in the figure, abuts against the first electromagnet 1, and the other end of the first spring 2, i.e., the right end shown in the figure, abuts against one end of the valve core 6, i.e., the left end shown in the figure.

[0037] Based on the above embodiments, in another embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the valve core 6 is provided with a second spring cavity 22 at one end near the second electromagnet 12, i.e., the right end shown in the figure. The second spring cavity 22 is provided with a second spring 11. One end of the second spring 11, i.e., the right end shown in the figure, abuts against the second electromagnet 12. The other end of the second spring 11, i.e., the left end shown in the figure, abuts against the other end of the valve core 6, i.e., the right end shown in the figure.

[0038] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the valve block 4 also has several connecting holes for connection, and detachable connecting parts are installed in the connecting holes. More specifically, the connecting parts include screws 7, etc., and one screw 7 is installed in each connecting hole. In addition, the valve block 4 also has a positioning pin 8 for positioning, which is located on one side of the connecting part.

[0039] Based on the above embodiments, in another embodiment of the present invention, such as Figures 1 to 4 As shown, for the solenoid valve, a three-position five-way solenoid directional valve is preferred. Furthermore, the left and right ends of the valve core 6 are respectively provided with a first gasket 3 and a second gasket 10 with identical structures. Sealing rings 5, preferably O-rings, are provided on the pressure port, signal port, and return port for sealing.

[0040] Compared to existing solenoid valves, this structure features a through-hole 9 on the valve core 6 that communicates with and penetrates the valve chamber 13. Two signal ports for load feedback are also directly located on the valve body. During operation, when the valve core 6 is energized for reversal and de-energized for reset, the pressure at both ends of the valve core 6 is relatively balanced under the action of the through-hole 9, resulting in less impact and smoother operation. Furthermore, by directly connecting the first signal port 18 and the second signal port 20 to the valve body, the structure is simpler, leading to lower operating costs and a lower failure rate.

[0041] In addition, this utility model also proposes a hydraulic system, including a solenoid valve, specifically the solenoid valve described above.

[0042] The hydraulic system of this structure, accordingly, possesses the advantages of the aforementioned solenoid valve.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electromagnetic valve characterized by comprising: The valve body is provided with a first electromagnet and a second electromagnet at two ends respectively, a valve cavity is formed in the valve body, a movable valve core is arranged in the valve cavity, a through hole is formed in the valve core and communicates with the valve cavity at two ends, a plurality of pressure oil ports communicating with the valve cavity are formed in one side of the valve body, an oil inlet port communicating with the valve cavity is formed in the other side of the valve body, and a plurality of signal ports for feeding back load information are formed in one side of the oil inlet port. The pressure oil ports include a first pressure port and a second pressure port arranged on one side of the first pressure port.

2. The electromagnetic valve according to claim 1, characterized by The signal ports include a first signal port arranged on one side of the oil inlet port.

3. The electromagnetic valve according to claim 2, characterized by The signal ports further include a second signal port arranged on the side of the oil inlet port away from the first signal port.

4. The electromagnetic valve according to claim 3, characterized by A plurality of oil return ports communicating with the valve cavity are further arranged on the valve body and arranged on one side or both sides of the oil inlet port.

5. The electromagnetic valve according to claim 4, characterized by A first spring cavity is further arranged on one end of the valve core close to the first electromagnet, a first spring is arranged in the first spring cavity, one end of the first spring abuts against the first electromagnet, and the other end of the first spring abuts against one end of the valve core.

6. The electromagnetic valve according to claim 5, characterized by A second spring cavity is further arranged on one end of the valve core close to the second electromagnet, a second spring is arranged in the second spring cavity, one end of the second spring abuts against the second electromagnet, and the other end of the second spring abuts against the other end of the valve core.

7. The electromagnetic valve according to claim 6, characterized by A plurality of connecting holes for connection are further formed in the valve body, and a detachable connecting piece is arranged in the connecting hole.

8. The electromagnetic valve according to claim 7, characterized by A positioning pin for positioning is further arranged on the valve body and arranged on one side of the connecting piece. The electromagnetic valve is a three-position five-way electromagnetic reversing valve.

9. The electromagnetic valve according to claim 8, characterized by The electromagnetic valve is the electromagnetic valve according to any one of claims 1 to 9.

10. A hydraulic system comprising a solenoid valve, characterized in that ​

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