Reversing valve with pressure protection mechanism

Abstract

The utility model discloses a reversing valve with a pressure protection mechanism, which relates to the technical field of reversing valves and comprises a valve body, a pressure relief component is mounted at the top of the valve body, an adjusting component is mounted on one side of the pressure relief component, the pressure relief component comprises a pressure relief block, the pressure relief block is mounted at the top of the valve body, and the adjusting component is mounted on the other side of the pressure relief component. A same liquid outlet hole is formed in the top of the pressure relief block and the top of the valve body in a penetrating mode, a pressure relief hole is formed in the position, close to one side, of the top of the pressure relief block in a penetrating mode, a through hole is formed in the inner side of the liquid outlet hole, a baffle ring is fixedly installed in the through hole, and a piston is movably installed on one side of the baffle ring and located in the pressure relief block. A sliding seat is mounted at one end of the piston; the overpressure oil liquid can be automatically discharged, pressure relief can be automatically stopped, protection of the valve body and a hydraulic system is improved, meanwhile, the preset value of the pressure is conveniently adjusted, and the pressure relief valve is suitable for protecting hydraulic systems of different specifications and meeting the use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, in particular to a reversing valve with a pressure protection mechanism. Background Art

[0002] A reversing valve is a valve with more than two flow modes, also known as a multi-way valve or a multi-way reversing valve. The valve core is pushed to the other side under the action of external force, so that the original oil circuit through one interface is cut off and a new oil circuit is established, thereby realizing the reversal of the oil port. The reversing valve is widely used in engineering machinery, machine tools, and hydraulic transmission systems. This scheme specifically relates to a reversing valve with a pressure protection mechanism;

[0003] When the existing reversing valve is in use, when the oil pressure is too high, the valve body and the hydraulic system are prone to rupture or leakage, which is not convenient for automatic pressure relief, reducing the protection effect. In addition, different hydraulic systems are subjected to different pressures, and it is not convenient to adjust the preset value of pressure protection, which has a certain impact on actual use. Utility Model Content

[0004] The main purpose of the utility model is to provide a reversing valve with a pressure protection mechanism, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A reversing valve with a pressure protection mechanism comprises a valve body, a pressure relief assembly is installed on the top of the valve body, an adjusting assembly is installed on one side of the pressure relief assembly, the pressure relief assembly comprises a pressure relief block, the pressure relief block is installed on the top of the valve body, the same liquid outlet is opened through the pressure relief block and the top of the valve body, a pressure relief hole is opened through the top of the pressure relief block near one side, a through hole is opened on the inner side of the liquid outlet, a retaining ring is fixedly installed inside the through hole, a piston is movably installed on one side of the retaining ring and inside the pressure relief block, a sliding seat is installed at one end of the piston, four guide rods are installed inside the pressure relief block and through both sides of the sliding seat near the edge, a guide column is installed on one side of the sliding seat, and a spring is installed around the guide column and inside the pressure relief block.

[0007] As a further solution of the utility model, the liquid outlet hole is connected to the pressure relief hole through a through hole, and the piston is slidably arranged in the through hole.

[0008] As a further solution of the utility model, the guide column is located inside the pressure relief block and is fixedly installed, and penetrates inside the slide seat and is slidably installed.

[0009] As a further solution of the utility model, the four guide pillars are arranged in a ring shape, and one end of the spring is connected to the slide seat.

[0010] As a further solution of the utility model, the adjustment assembly includes an adjustment block, which is installed on one side of the pressure relief block, a stopper is movably installed inside the adjustment block, sliding grooves are provided inside the adjustment block near the upper and lower ends, guide blocks are installed on the periphery of the stopper and in the two sliding grooves, an adjustment rod is movably installed on the outside of the stopper and passes through the interior of the adjustment block, and a knob is fixedly installed on the outer end of the adjustment rod.

[0011] As a further solution of the utility model, the guide block is located in the slide groove and is slidably arranged, and the inner side of the stopper is connected to the other end of the spring.

[0012] As a further solution of the utility model, the inner end of the adjusting rod is movably connected to the stopper through a bearing, and the adjusting rod is located inside the adjusting block and is threadedly connected.

[0013] The beneficial effects of the utility model are as follows:

[0014] By setting a pressure relief component, the liquid outlet is connected to the hydraulic system. When the pressure exceeds the preset value of the spring force, the spring contracts and drives the piston to slide, opening the through hole and connecting it to the pressure relief hole, so that the over-pressure oil can be automatically discharged to prevent the hydraulic system and the valve body from rupture or leakage. After the oil is discharged, the internal pressure is less than the preset value of the spring force, so that the piston slides to close the through hole, and the pressure relief can be automatically stopped, thereby improving the protection of the valve body and the hydraulic system.

[0015] By setting an adjustment component, the two ends of the spring are connected to the sliding seat and the stop seat respectively. By rotating the knob, the adjusting rod drives the stop seat to slide under the action of the threaded connection, so that the spring contracts or stretches, and the elastic force of the spring is adjusted, which is convenient for adjusting the preset value of the pressure. It is suitable for protecting hydraulic systems and usage requirements of different specifications, and can also adjust the elastic force of the spring loss and improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a reversing valve with a pressure protection mechanism according to the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of a pressure relief component in a reversing valve with a pressure protection mechanism according to the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of a regulating assembly in a reversing valve with a pressure protection mechanism according to the utility model;

[0019] Figure 4 The utility model is a front view of the whole interior of a reversing valve pressure relief assembly and a regulating assembly with a pressure protection mechanism.

[0020] In the figure: 1. valve body; 2. pressure relief assembly; 3. adjusting assembly; 4. pressure relief block; 5. liquid outlet; 6. pressure relief hole; 7. through hole; 8. retaining ring; 9. piston; 10. slide seat; 11. guide rod; 12. guide column; 13. spring; 14. adjusting block; 15. retaining seat; 16. slide groove; 17. guide block; 18. adjusting rod; 19. knob. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-4 As shown, a reversing valve with a pressure protection mechanism comprises a valve body 1, a pressure relief assembly 2 is installed on the top of the valve body 1, an adjusting assembly 3 is installed on one side of the pressure relief assembly 2, the pressure relief assembly 2 comprises a pressure relief block 4, the pressure relief block 4 is installed on the top of the valve body 1, a same liquid outlet 5 is opened through the pressure relief block 4 and the top of the valve body 1, a pressure relief hole 6 is opened through the top of the pressure relief block 4 near one side, a through hole 7 is opened on the inner side of the liquid outlet 5, a retaining ring 8 is fixedly installed inside the through hole 7, a piston 9 is movably installed on one side of the retaining ring 8 and inside the pressure relief block 4, a sliding seat 10 is installed at one end of the piston 9, four guide rods 11 are installed inside the pressure relief block 4 and through both sides of the sliding seat 10 near the edge, a guide column 12 is installed on one side of the sliding seat 10, a spring 13 is installed on the periphery of the guide column 12 and inside the pressure relief block 4, and a liquid inlet hole and a liquid discharge hole are respectively opened at the bottom of the valve body 1.

[0023] In this embodiment, the liquid outlet hole 5 is interconnected with the pressure relief hole 6 through the through hole 7, and the piston 9 is slidably arranged in the through hole 7. The oil is transported to the hydraulic system through the liquid outlet hole 5, and the through hole 7 is opened and closed by the movement of the piston 9 to prevent overpressure.

[0024] In this embodiment, the guide column 12 is fixedly installed inside the pressure relief block 4 and penetrates the interior of the slide seat 10 to slide. The slide seat 10 drives the piston 9 to slide through the guide rod 11, so that the piston 9 opens or closes the through hole 7.

[0025] In this embodiment, four guide pillars 12 are arranged in a ring shape, one end of the spring 13 is connected to the slide seat 10, and the spring 13 provides a specified pressure to make the piston 9 automatically close the through hole 7.

[0026] In this embodiment, the adjustment component 3 includes an adjustment block 14, which is installed on one side of the pressure relief block 4. A stopper 15 is movably installed inside the adjustment block 14. Slide grooves 16 are provided inside the adjustment block 14 near the upper and lower ends. Guide blocks 17 are installed on the periphery of the stopper 15 and in the two slide grooves 16. An adjustment rod 18 is movably installed on the outside of the stopper 15 and passes through the inside of the adjustment block 14. A knob 19 is fixedly installed on the outer end of the adjustment rod 18. The stopper 15 is slid by the adjusting rod 18 to adjust the elastic force of the spring 13, so as to facilitate the adjustment of different preset pressure values.

[0027] In this embodiment, the guide block 17 is slidably arranged in the slide groove 16, and the inner side of the stopper 15 is connected to the other end of the spring 13. The stopper 15 slides guided by the guide block 17, so that the spring 13 contracts to increase the elastic force or stretches to reduce the elastic force.

[0028] In this embodiment, the inner end of the adjusting rod 18 is movably connected to the stop seat 15 through a bearing. The adjusting rod 18 is located inside the adjusting block 14 and is threadedly connected. The adjusting rod 18 drives the stop seat 15 to slide under the action of the threaded connection to adjust the elastic force of the spring 13.

[0029] It should be noted that the utility model is a reversing valve with a pressure protection mechanism. When in use, oil is first allowed to enter from the liquid inlet, and the solenoid coils at both ends of the valve body 1 drive the valve core to slide to adjust the liquid inlet and the liquid outlet 5 to be connected or the discharge hole and the liquid outlet 5 to be connected. The oil is transported to the hydraulic system through the liquid outlet 5. When the pressure in the hydraulic system exceeds the predetermined value of the elastic force of the spring 13, the oil pushes the piston 9 to guide the slide seat 10 to slide through the guide rod 11. At the same time, the spring 13 contracts to open the through hole 7, so that the pressure relief hole 6 is connected to the liquid outlet 5, and the over-pressure oil is discharged and collected. When the pressure is less than the predetermined value of the elastic force of the spring 13, the piston 9 slides under the action of the spring 13 to automatically close the through hole 7. Hydraulic systems of different specifications are subjected to different pressures. When adjusting the pressure value of the protection range, the knob 19 is rotated to make the adjusting rod 18 drive the block seat 15 to slide under the action of the threaded connection, so that the spring 13 contracts to increase the elastic force or stretches to reduce the elastic force.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A reversing valve with a pressure protection mechanism, comprising a valve body (1), a pressure relief assembly (2) being mounted on the top of the valve body (1), and an adjusting assembly (3) being mounted on one side of the pressure relief assembly (2), characterized in that: The pressure relief assembly (2) comprises a pressure relief block (4), wherein the pressure relief block (4) is mounted on the top of the valve body (1), a same liquid outlet (5) is provided through the pressure relief block (4) and the top of the valve body (1), a pressure relief hole (6) is provided through the top of the pressure relief block (4) near one side, a through hole (7) is provided on the inner side of the liquid outlet (5), a retaining ring (8) is fixedly mounted inside the through hole (7), a piston (9) is movably mounted on one side of the retaining ring (8) and located inside the pressure relief block (4), a sliding seat (10) is mounted on one end of the piston (9), four guide rods (11) are mounted inside the pressure relief block (4) and through both sides of the sliding seat (10) near the edge, a guide column (12) is installed on one side of the sliding seat (10), and a spring (13) is installed on the periphery of the guide column (12) and located inside the pressure relief block (4).

2. A reversing valve with a pressure protection mechanism according to claim 1, characterized in that: The liquid outlet hole (5) is connected to the pressure relief hole (6) via the through hole (7), and the piston (9) is slidably arranged in the through hole (7).

3. A reversing valve with a pressure protection mechanism according to claim 1, characterized in that: The guide column (12) is located inside the pressure relief block (4) in a fixed installation manner, and penetrates inside the slide seat (10) in a sliding manner.

4. A reversing valve with a pressure protection mechanism according to claim 1, characterized in that: The four guide pillars (12) are arranged in a ring-shaped manner, and one end of the spring (13) is connected to the slide seat (10).

5. A reversing valve with a pressure protection mechanism according to claim 1, characterized in that: The adjustment assembly (3) comprises an adjustment block (14), the adjustment block (14) being mounted on one side of the pressure relief block (4), a stopper (15) being movably mounted inside the adjustment block (14), a slide groove (16) being provided inside the adjustment block (14) near the upper and lower ends, a guide block (17) being mounted on the periphery of the stopper (15) and in the two slide grooves (16), an adjustment rod (18) being movably mounted outside the stopper (15) and penetrating the inside of the adjustment block (14), and a knob (19) being fixedly mounted on the outer end of the adjustment rod (18).

6. A reversing valve with a pressure protection mechanism according to claim 5, characterized in that: The guide block (17) is slidably arranged in the slide groove (16), and the inner side of the stopper (15) is connected to the other end of the spring (13).

7. A reversing valve with a pressure protection mechanism according to claim 5, characterized in that: The inner end of the adjusting rod (18) is movably connected to the stopper (15) via a bearing, and the adjusting rod (18) is located inside the adjusting block (14) and is threadedly connected.

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