A merging valve and hydraulic system

Abstract

The utility model provides a kind of confluence valve and hydraulic system, the confluence valve includes valve block, the valve cavity is equipped in the valve block, the valve cavity is equipped with the spool of movable, the spool inside is equipped with the oil channel of through spool both ends;Several passages are further provided in the valve block, several The passage can be communicated with the spool;The overflow valve of overflow function is further provided on the valve block, one end of the overflow valve can be communicated with the spool by the passage.This structure's confluence valve, compared with the confluence valve of existing structure, structure is relatively simple and compact, the maximum flow of confluence valve can reach 100 liters per minute, maximum working pressure can reach 25 megapascal.Through the oil channel of through spool being set in the spool inside, its reversing is more stable and reliable.In addition, by setting overflow valve on the valve block, when pressure overload, overflow protection can be provided in time.Overall, it has the advantages of compact structure, stable reversing, overload protection function and lower use cost.

Description

Technical Field

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

[0002] In recent years, with the continuous advancement of urbanization in my country, China has become the largest producer and seller of construction machinery, and various types of construction machinery are increasingly widely used in various engineering construction projects.

[0003] In construction machinery, hydraulic systems are typically installed, including hydraulic tanks, pumps, motors, and various hydraulic valves. These valves include flow valves, pressure valves, and directional valves, with flow valves further encompassing merging valves, which are currently widely used. However, the widely used merging valves have been found to have common problems during use, such as insufficiently compact structure, and prone to vibration and instability during reversing under high pressure and high flow conditions. Furthermore, current merging valves lack overload overflow protection, and their production and operating costs are also higher.

[0004] In summary, how to provide a confluence valve that is compact in structure, provides smooth reversing under high-pressure working conditions, has overload overflow protection, and is low in cost, as well as a hydraulic system including this confluence 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 confluence valve with a compact structure, smooth reversing under high pressure working conditions, overload overflow protection, and low cost, as well as a hydraulic system including this confluence valve.

[0006] The solution of this utility model is implemented as follows: This utility model proposes a confluence valve, which includes a valve block, a valve cavity within the valve block, a movable valve core within the valve cavity, and an oil passage penetrating both ends of the valve core. The valve block also has several channels that communicate with the valve core. The valve block also has an overflow valve that serves as an overflow valve, one end of which communicates with the valve core through the channels. Compared with existing confluence valves, this confluence valve has a simpler and more compact structure. The maximum flow rate of the confluence valve can reach 100 liters per minute, and the maximum working pressure can reach 25 MPa. By creating an oil passage penetrating the valve core, its switching is smoother and more reliable during operation. Furthermore, by setting an overflow valve on the valve block, overflow protection can be provided in a timely manner when the pressure is overloaded. Overall, it has the advantages of compact structure, smooth switching, overload protection function, and lower operating cost.

[0007] Another technical solution of this utility model is that, based on the above, the valve block is further provided with an electromagnetic coil, which is located at one end of the valve core. When the electromagnetic coil is energized, it can drive the valve core to move.

[0008] Another technical solution of this utility model is that, based on the above, the valve block is further provided with a first plug, the first plug is disposed at the other end of the valve core, and the surface of the first plug that contacts the valve block is further provided with a first sealing ring that plays a sealing role.

[0009] Another technical solution of this utility model is that, based on the above, the confluence valve further includes a return spring, which is disposed between the valve core and the first plug.

[0010] Another technical solution of this utility model is that, based on the above, one end of the reset spring is sleeved on the end of the valve core near the first plug, and the other end of the reset spring abuts against the first plug.

[0011] Another technical solution of this utility model is that, based on the above, the valve block is provided with a mounting hole, the overflow valve is detachably fixed in the mounting hole, and the overflow valve and the mounting hole are also provided with a second sealing ring for sealing.

[0012] Another technical solution of this utility model is that, based on the above, the valve block is further provided with a number of oil ports, which are connected to the oil passage and the valve core.

[0013] Another technical solution of this utility model is that, based on the above, the oil port includes a working oil port, a pressure oil port, and a return oil port, the working oil port and the return oil port are located on one side of the valve block, and the pressure oil port is located on the other side of the valve block.

[0014] Another technical solution of this utility model is that, based on the above, a detachable second plug is provided between the working oil port and the return oil port, and a detachable third plug is provided at the end of the valve block near the electromagnetic coil.

[0015] On the other hand, this utility model also proposes a hydraulic system including a confluence valve, wherein the confluence valve is the confluence valve as 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 1 This is a schematic diagram of the structure of a confluence valve according to the present invention; Figure 2 for Figure 1 Top view; Figure 3 for Figure 1 The left view; Figure 4 for Figure 1 The right view; Figure 5 for Figure 4 Schematic sectional view along the AA direction.

[0018] The correspondence between the reference numerals in the attached figures is as follows: 1. First plug; 2. First sealing ring; 3. Return spring 4 Valve core 5 Valve block 6 Second plug 7. Electromagnetic coil; 8. Overflow valve; 9. Second sealing ring 10 Channel 11 Third Plug 12 Oil Channel 13 Working oil port 14 Pressure oil port 15 Return oil port Detailed Implementation

[0019] 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.

[0020] The embodiments of this utility model are as follows, please refer to them. Figures 1 to 5 The shown confluence valve is used in a hydraulic system. Specifically, the confluence valve includes a valve block 5, which contains a hollow valve cavity. Inside the valve cavity is a valve core 4 that can move up and down. The valve core 4 has oil passages 12 running through its upper and lower ends, allowing oil to flow within these passages. The valve block 5 also has several channels 10 for oil flow, which communicate with the valve core 4. The valve block 5 also has an overflow valve 8, which serves as an overflow valve. One end of the overflow valve 8... Figure 5 The right end shown can be connected to the valve core 4 via channel 10. Compared with existing confluence valves, this confluence valve has a simpler and more compact structure, with a maximum flow rate of 100 liters per minute and a maximum working pressure of 25 MPa. By opening an oil passage 12 through the valve core 4, its switching is smoother and more reliable during operation. In addition, by setting an overflow valve 8 on the valve block 5, overflow protection can be provided in time when the pressure is overloaded. Overall, it has the advantages of compact structure, smooth switching, overload protection function, and lower operating cost.

[0021] Based on the above embodiments, in another embodiment of the present invention, such as Figures 1 to 5As shown, the valve block 5 is also equipped with an electromagnetic coil 7, which is located at one end of the valve core 4. Figure 5 As shown at the upper end, when the electromagnetic coil 7 is energized, it can drive the valve core 4 to move. Specifically, when the electromagnetic coil 7 is energized, it generates a suction force, which drives the valve core 4 to move upward. When the electromagnetic coil 7 is de-energized, the valve core 4 moves downward under the action of the reset spring 3, thus completing the reset.

[0022] Based on the above embodiments, in another embodiment of the present invention, such as Figure 5 As shown, the valve block 5 is also provided with a first plug 1. The first plug 1 is located at the other end of the valve core 4, that is, the lower end shown in the figure. The surface of the first plug 1 that contacts the valve block 5 is also provided with a first sealing ring 2 that plays a sealing role.

[0023] Based on the above embodiments, in another embodiment of the present invention, such as Figure 5 As shown, the confluence valve also includes a return spring 3, which is disposed between the valve core 4 and the first plug 1, specifically at the lower end of the valve core 4.

[0024] Based on the above embodiments, in another embodiment of the present invention, such as Figure 5 As shown, one end of the reset spring 3, i.e. the upper end shown in the figure, is sleeved on the end of the valve core 4 near the first plug 1, i.e. the lower end shown in the figure. The other end of the reset spring 3, i.e. the lower end shown in the figure, abuts against the first plug 1. As mentioned earlier, when the electromagnetic coil 7 is energized, it will drive the valve core 4 to move upward. When the electromagnetic coil 7 is de-energized, the valve core 4 will complete the reset under the action of the reset spring 3.

[0025] Based on the above embodiments, in another embodiment of the present invention, such as Figure 5 As shown, the valve block 5 has a mounting hole, and the overflow valve 8 is detachably fixed in the mounting hole. A second sealing ring 9, which provides a sealing function, is also provided between the overflow valve 8 and the mounting hole. It should be noted that both the first sealing ring 2 and the second sealing ring 9 are preferably O-rings, and the preferred material is rubber or plastic.

[0026] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 and Figure 5 As shown, the valve block 5 is also provided with several oil ports, which can be connected to the oil passage 12 and the valve core 4 to provide pressurized oil to the oil ports, or to allow the oil in the valve core 4 to flow out from the oil ports.

[0027] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 and Figure 5As shown, the oil ports specifically include a working oil port 13, a pressure oil port 14, and a return oil port 15. The working oil port 13 and the return oil port 15 are located on one side of the valve block 5, i.e., the right side as shown in the figure, while the pressure oil port 14 is located on the other side of the valve block 5, i.e., the left side as shown in the figure.

[0028] Based on the above embodiments, in another embodiment of the present invention, such as Figure 5 As shown, a detachable second plug 6 is provided between the working oil port 13 and the return oil port 15, and a detachable third plug 11 is provided at the end of the valve block 5 near the electromagnetic coil 7, i.e., the upper end shown in the figure.

[0029] As described above, this confluence valve has a simpler and more compact structure compared to existing confluence valves, resulting in lower production and usage costs. During operation, the maximum flow rate can reach 100 liters per minute, and the maximum working pressure can reach 25 MPa. By creating an oil passage 12 through the valve core 4, its switching is smoother and more reliable during operation. Furthermore, by installing a relief valve 8 on the valve block 5, timely relief protection can be provided in case of pressure overload. Overall, it has the advantages of compact structure, smooth switching, overload protection function, and lower operating costs.

[0030] Furthermore, this utility model also proposes a hydraulic system including a confluence valve, which is the confluence valve described above. Accordingly, the hydraulic system possesses the advantages of the aforementioned confluence valve.

[0031] 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. A confluence valve, characterized in that, The confluence valve includes a valve block, a valve chamber inside the valve block, a movable valve core inside the valve chamber, and an oil passage running through both ends of the valve core inside the valve core. The valve block is also provided with several channels, which can communicate with the valve core; The valve block is also provided with an overflow valve that serves as an overflow valve, and one end of the overflow valve can be connected to the valve core through the channel.

2. The confluence valve according to claim 1, characterized in that, The valve block is also equipped with an electromagnetic coil, which is located at one end of the valve core. When the electromagnetic coil is energized, it can drive the valve core to move.

3. The confluence valve according to claim 2, characterized in that, The valve block is also provided with a first plug, which is located at the other end of the valve core. The surface of the first plug that contacts the valve block is also provided with a first sealing ring for sealing.

4. The confluence valve according to claim 3, characterized in that, The confluence valve also includes a return spring, which is disposed between the valve core and the first plug.

5. The confluence valve according to claim 4, characterized in that, One end of the return spring is sleeved on the end of the valve core near the first plug, and the other end of the return spring abuts against the first plug.

6. The confluence valve according to claim 5, characterized in that, The valve block is provided with a mounting hole, and the overflow valve is detachably fixed in the mounting hole. The overflow valve and the mounting hole are also provided with a second sealing ring for sealing.

7. The confluence valve according to claim 6, characterized in that, The valve block is also provided with several oil ports, which are connected to the oil passage and the valve core.

8. The confluence valve according to claim 7, characterized in that, The oil port includes a working oil port, a pressure oil port, and a return oil port. The working oil port and the return oil port are located on one side of the valve block, and the pressure oil port is located on the other side of the valve block.

9. The confluence valve according to claim 8, characterized in that, A removable second plug is provided between the working oil port and the return oil port, and a removable third plug is provided at the end of the valve block near the electromagnetic coil.

10. A hydraulic system comprising a confluence valve, characterized in that, The merging valve is the merging valve according to any one of claims 1 to 9.

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