Large pass integrated dn50 electro-hydraulic reversing valve

Abstract

The application discloses a large-passage integrated DN50 electro-hydraulic reversing valve, which comprises a valve body, a valve core arranged in the valve body, an electromagnetic reversing valve and an overflow valve arranged on the valve body, a valve core channel penetrating through the valve body, the valve core being slidably connected to the valve core channel, end covers arranged at both ends of the valve core channel, spring cavities arranged in the end covers, springs arranged in the spring cavities, the end of the valve core being connected to the end cover through the spring, and an auxiliary oil channel arranged on the end cover. A plurality of flow channels used as hydraulic oil paths are arranged in the valve body, and flow channel openings are formed on the outer surface of the valve body, wherein the flow channel openings at least comprise a pressure P opening, an oil return T opening, a working A opening, a working B opening, an oil X opening and an oil Y opening. The overflow valve and the electromagnetic reversing valve are connected to a flow channel through the flow channel. Thus, the reversing valve can be operated on site to realize reversing, the large-flow hydraulic system use demand is met, and the working reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve technology, and in particular to a large-diameter integrated DN50 electro-hydraulic directional valve. Background Technology

[0002] Many existing coal, metal and non-metal mining companies use tailings, crushed stone, fly ash, industrial slag and other solid waste from mines to make paste-like slurries that do not require dehydration. These slurries are then continuously pumped into the underground goaf by industrial pumps. This method can improve resource extraction rate and reduce land occupation and environmental pollution.

[0003] With the widespread application of filling industrial pumps, the different characteristics of tailings produced by different mines have led to increasingly larger requirements for the pumping capacity of existing filling industrial pumps, which in turn has increasingly larger requirements for the flow rate of hydraulic systems. Currently, the maximum nominal diameter of hydraulic slide valves on the market is DN32, which cannot meet the requirements of large flow hydraulic systems. In addition, traditional hydraulic systems include various components and external connecting pipelines, resulting in a dispersed structure and complex assembly.

[0004] A DN50 large-diameter integrated spool valve has been specially developed for high-flow hydraulic systems to meet the needs of such systems. The valve assembly integrates the relief valve and the directional valve, enabling local operation of the directional valve for easy switching. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the prior art and provide a large-diameter integrated DN50 electro-hydraulic directional valve.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The large-diameter integrated DN50 electro-hydraulic directional valve includes a valve body (1), a valve core (2) inside the valve body (1), an electromagnetic directional valve (3) and a relief valve (4) on the valve body (1), a valve core channel (5) penetrating the valve body (1) inside the valve body (1), the valve core (2) being slidably connected to the valve core channel (5), end caps (6) at both ends of the valve core channel (5), a spring cavity (7) inside the end cap (6), a spring (8) inside the spring cavity (7), the end of the valve core (2) being connected to the end cap (6) via the spring (8), and an auxiliary oil passage (9) on the end cap (6); the valve body (1) has multiple hydraulic oil circuits. The flow channel is formed on the outer surface of the valve body (1). The flow channel includes at least a pressure port P (10), a return port T (11), a working port A (12), a working port B (13), an oil port X (14), and an oil port Y (15). The oil inlet of the relief valve (3) is connected to the pressure port P (10) through the flow channel, and the return port of the relief valve (3) is connected to the return port T (11) through the flow channel. The oil inlet of the electromagnetic directional valve (3) is connected to the oil port Y (15) through the flow channel, and the return port of the electromagnetic directional valve (3) is connected to the oil port X (14) through the flow channel. The control oil ports of the electromagnetic directional valve (3) are connected to the auxiliary oil passages (9) through the flow channel.

[0008] Preferably, the valve core channel (5) is provided with five annular grooves, namely a first annular groove (16), a second annular groove (17), a third annular groove (18), a fourth annular groove (19) and a fifth annular groove (20). The first annular groove (16) and the fifth annular groove (18) are connected to the return oil T port (11) through a flow channel. The second annular groove (17) is connected to the working A port (12) through a flow channel. The third annular groove (18) is connected to the pressure P port (10) through a flow channel. The fourth annular groove (17) is connected to the working A port (12) through a flow channel.

[0009] Preferably, the overflow valve (4) is a cartridge two-way overflow valve.

[0010] Preferably, the electromagnetic directional valve (3) is a three-position four-way electromagnetic directional valve.

[0011] Preferably, there are two working ports A (12) and two working ports B (13).

[0012] Preferably, the excess flow passage on the valve body (1) is provided with a blocking plate (21).

[0013] Preferably, the valve core (2) has a rectangular pressure equalization groove.

[0014] Preferably, the electromagnetic reversing valve (3) is provided with a handle for manual reversing.

[0015] Preferably, the valve body (1) is integrally formed by casting.

[0016] The present invention will be further described below:

[0017] This utility model relates to a large-diameter integrated DN50 electro-hydraulic directional valve, designed as a three-position four-way electro-hydraulic directional valve with a mid-position O-type function. It includes a rectangular valve body 1, with a valve core channel 5 inside. The valve core 2 slides within the valve core channel 5 to form the size and position of the throttling orifice, thereby controlling the magnitude and direction of the flow through the valve orifice. A flow channel is formed within the valve body 1 as a hydraulic oil circuit for connecting various hydraulic components. The hydraulic oil circuit piping is integrated within the valve body 1, effectively reducing oil leakage and increasing working pressure. A flow channel opening is formed on the outer wall of the valve body 1, connecting to the flow channel. The flow channel opening includes a pressure port P 10, a return port T 11, a working port A 12, and a working port B 13. The valve core channel 5 has a first annular groove 16 and a fifth annular groove 20, which connect to the return port T via the flow channel. The second annular groove 17 is connected to the working port A via a flow channel, the third annular groove 18 is connected to the pressure port P via a flow channel, and the fourth annular groove 19 is connected to the working port A 12 via a flow channel. The valve core 2 is made of 42CrMo material and adopts an integral design. The maximum width of the flow channel between the valve core 2 and the valve block 1 reaches 30mm, and the maximum flow rate can reach 1500L / min. The pressure loss is small when the flow rate is large. The stroke of the valve core 2 is controlled at 35mm, and the response speed is fast. The overall design of the valve core 2 adopts a symmetrical design of full rectangular grooves, which can lubricate the valve core 2 and keep the valve core 2 in a stable state during movement. The valve body 1 is integrally machined from ductile iron. The valve core 2 is in direct contact with the valve block 1, which avoids the use of a valve sleeve and reduces the volume of the valve block 2. The excess flow channel openings formed on the surface of the valve body 2 are sealed by the plug plate 21.

[0018] The electromagnetic directional valve 3 is a three-position four-way electromagnetic directional valve, which has two functions: manual and electromagnet switching. In the event of a power outage, it can be used manually for emergency handling or for maintenance and replacement of parts.

[0019] The end cap 6 is provided with an auxiliary oil passage 9 that connects to the spring cavity 7. The spring cavity 7 is connected to the control oil port of the solenoid directional valve 3 through the auxiliary oil passage 9 and the corresponding flow passage on the valve body 1. Thus, the solenoid directional valve 3 controls the flow direction of the hydraulic oil. The hydraulic oil acts on one end of the valve core 2, pushing the valve core 2 to slide in the valve core channel 5, thereby realizing the valve core reversal. The valve body 1 is provided with an oil inlet X14 and an oil return Y15 for connecting to an external oil source. Through the corresponding flow passage in the valve body 1, it can be connected to the oil inlet and oil return of the solenoid directional valve 3, thereby reducing external pipelines and improving the integration level of the valve block 1.

[0020] When the solenoid directional valve 3 is de-energized, the valve core 2 is positioned in the middle by the valve body 1 under the action of the springs 8 at both ends. At this time, the pressure port P 10, return port T 11, working port A 12, and working port B 12 of the directional valve are not connected. When the electromagnet on the left side of the solenoid directional valve 3 is energized, it pushes the valve core 2 to move to the left, so that the flow channels of the pressure port P 10 of the directional valve are connected to the flow channels of the working port A 12, the working port B 13, and the return port T 11. Conversely, when the electromagnet on the right side of the solenoid directional valve 3 is energized, the flow channels of the pressure port P 10, the working port B 13, the working port A 12, and the return port T 11 are connected.

[0021] A cartridge relief valve 4, which limits and protects the hydraulic pressure, is connected to the valve body 1. It is preferably a two-way relief valve with a DN40 diameter and an oil flow capacity of 1200L / min. The overflow return oil is directly connected to the T port of the directional valve in the valve block through the flow channel inside the valve body 1, reducing the need for external hydraulic hoses. When the working pressure in the flow channel is higher than the set value of the relief valve 4, the oil pressure opens the relief valve 4 and unloads from the return port until the set value of the relief valve 4 is reached. The relief valve 4 then closes automatically, thereby protecting the various components of this valve from being affected by unstable system pressure.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This utility model features a large-diameter integrated DN50 electro-hydraulic directional valve. Compared to traditional single spool valves, it integrates the directional valve and relief valve into a single valve assembly, enabling on-site operation of the directional valve for switching, making it convenient to use. Furthermore, it forms a flow channel connecting various hydraulic components within the valve body, effectively reducing the possibility of oil leakage between valves, improving sealing performance, and thus meeting the requirements of high-flow hydraulic systems with high operational reliability. Attached Figure Description

[0024] Figure 1 This is an assembly diagram of the large-diameter integrated DN50 electro-hydraulic directional valve of this utility model.

[0025] Figure 2 This is a schematic diagram of the valve body structure of the large-diameter integrated DN50 electro-hydraulic directional valve related to this utility model.

[0026] Figure 3 This is a cross-sectional schematic diagram of the large-diameter integrated DN50 electro-hydraulic directional valve of this utility model;

[0027] Figure 4 This is a top view schematic diagram of the large-diameter integrated DN50 electro-hydraulic directional valve of this utility model;

[0028] Figure 5 This is a schematic diagram of the valve core structure of the large-diameter integrated DN50 electro-hydraulic directional valve of this utility model.

[0029] Figure 6 This is a schematic diagram illustrating the working principle of the large-diameter integrated DN50 electro-hydraulic directional valve of this utility model.

[0030] In the diagram: 1. Valve body; 2. Valve core; 3. Solenoid directional valve; 4. Relief valve; 5. Valve core passage; 6. End cap; 7. Spring chamber; 8. Spring; 9. Auxiliary oil passage; 10. Pressure port P; 11. Return port T; 12. Working port A; 13. Working port B; 14. Oil port X; 15. Oil port Y; 16. First annular groove; 17. Second annular groove; 18. Third annular groove; 19. Fourth annular groove; 20. Fifth annular groove; 21. Blocking plate. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] See Figures 1 to 6 The large-diameter integrated electro-hydraulic directional valve with overflow includes a valve body 1, a valve core 2 inside the valve body 1, an electromagnetic directional valve 3 and an overflow valve 4 on the valve body 1, a valve core channel 5 passing through the valve body 1, the valve core 2 slidably connected to the valve core channel 5, end caps 6 at both ends of the valve core channel 5, spring cavities 7 inside the end caps 6, and springs 8 inside the spring cavities 7. The end of the valve core 2 is connected to the end caps 6 via the springs 8, and auxiliary oil passages 9 are provided on the end caps 6; the valve body 1 has multiple flow channels used as hydraulic oil circuits, and... The outer surface of the valve body 1 forms a flow channel, which includes at least a pressure port P 10, a return port T 11, a working port A 12, a working port B 13, an oil port X 14, and an oil port Y 15. The oil inlet of the relief valve 4 is connected to the pressure port P 10 through the flow channel, and the oil return port of the relief valve 4 is connected to the return port T 11 through the flow channel. The oil inlet of the solenoid directional valve 3 is connected to the oil port Y 15 through the flow channel, and the oil return port of the solenoid directional valve 3 is connected to the oil port X 14 through the flow channel. The control oil ports of the solenoid directional valve 3 are connected to the auxiliary oil passages 9 through the flow channels.

[0033] The valve core channel 5 is provided with a first annular groove 16, a second annular groove 17, a third annular groove 18, a fourth annular groove 19, and a fifth annular groove 20. The first annular groove 16 and the fifth annular groove 18 are connected to the return oil T port 11 through a flow channel. The second annular groove 17 is connected to the working A port 12 through a flow channel. The third annular groove 18 is connected to the pressure P port 10 through a flow channel. The fourth annular groove 17 is connected to the working A port 12 through a flow channel. The electromagnetic directional valve 3 is a three-position four-way electromagnetic directional valve. There are two working A ports 12 and two working B ports 13. The excess flow channel openings on the valve body 1 are provided with a blocking plate 21. The valve core 2 has a rectangular pressure equalization groove. The electromagnetic directional valve 3 is provided with a handle for manual switching. The valve body 1 is integrally formed by casting.

Claims

1. A large-diameter integrated DN50 electro-hydraulic directional valve, the large-diameter integrated DN50 electro-hydraulic directional valve comprising a valve body (1), characterized in that, The valve body (1) contains a valve core (2), and the valve body (1) is equipped with an electromagnetic directional valve (3) and an overflow valve (4). The valve body (1) contains a valve core channel (5) that passes through the valve body (1). The valve core (2) is slidably connected to the valve core channel (5). The valve core channel (5) has end caps (6) at both ends. The end caps (6) contain spring cavities (7) and springs (8). The end of the valve core (2) is connected to the end caps (6) via the springs (8). The end caps (6) have auxiliary oil passages (9). The valve body (1) contains multiple flow channels used as hydraulic oil circuits. The outer surface forms a flow channel, which includes at least a pressure port P (10), a return port T (11), a working port A (12), a working port B (13), an oil port X (14), and an oil port Y (15); the oil inlet of the relief valve (4) is connected to the pressure port P (10) through the flow channel, and the oil return port of the relief valve (4) is connected to the return port T (11) through the flow channel; the oil inlet of the electromagnetic directional valve (3) is connected to the oil port Y (15) through the flow channel, and the oil return port of the electromagnetic directional valve (3) is connected to the oil port X (14) through the flow channel; the control oil ports of the electromagnetic directional valve (3) are respectively connected to the auxiliary oil passage (9) through the flow channel.

2. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, The valve core channel (5) is provided with a first annular groove (16), a second annular groove (17), a third annular groove (18), a fourth annular groove (19) and a fifth annular groove (20). The first annular groove (16) and the fifth annular groove (20) are connected to the return oil T port (11) through a flow channel. The second annular groove (17) is connected to the working A port (12) through a flow channel. The third annular groove (18) is connected to the pressure P port (10) through a flow channel. The fourth annular groove (19) is connected to the working A port (12) through a flow channel.

3. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, The overflow valve (4) is a cartridge two-way overflow valve.

4. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, The solenoid directional valve (3) is a three-position four-way solenoid directional valve.

5. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, There are two working ports A (12) and two working ports B (13).

6. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, The valve body (1) has a blockage plate (21) on the excess flow passage.

7. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, The valve core (2) has a rectangular pressure equalization groove.

8. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, The electromagnetic reversing valve (3) is equipped with a handle for manual reversing.

9. The large-diameter integrated DN50 electro-hydraulic directional valve according to claim 1, characterized in that, The valve body (1) is integrally formed by casting.

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