Split pressure compensating valve

Abstract

The utility model discloses a kind of split type pressure compensation valves, including fixed column, the bottom of the fixed column is fixedly connected with first sleeve, the bottom of first sleeve is threadedly connected with second sleeve, the outside of second sleeve is equipped with oil inlet, the second sleeve is slidably connected with second valve core, the side of second valve core is equipped with slot, the top of second valve core is equipped with the hole hole that is communicated with slot, the outside of first sleeve is equipped with oil outlet, the first sleeve is slidably connected with first valve core, the utility model not only can be used by being equipped with the mutual cooperation of first sleeve, second sleeve and third sleeve, realizes the split processing to pressure compensation valve, so that pressure compensation valve can be split installation and maintenance, and can be used by being equipped with the mutual cooperation of oil inlet and multiple oil outlets, so that oil in first sleeve and second sleeve is smoothly discharged.

Description

Technical Field

[0001] This utility model relates to the field of pressure compensation valve technology, and in particular to a split-type pressure compensation valve. Background Technology

[0002] A pressure compensation valve is a device used in hydraulic systems. Its main function is to control the pressure difference before and after throttling, ensuring the accuracy of flow control and the synchronization of the actuator. The pressure compensation valve achieves precise flow control by maintaining the pressure difference between the inlet and outlet of the throttling valve at a fixed value.

[0003] Most existing pressure compensation valves are integrated structures, which are not convenient for individual components to be disassembled, thus having certain limitations. In order to better address the above problems, promote the development of industry technology, and improve core competitiveness, this application proposes a new composition structure that is different from the existing technology. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a split-type pressure compensation valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A split-type pressure compensation valve includes a fixed column, a first sleeve fixedly connected to the bottom of the fixed column, a second sleeve threadedly connected to the bottom of the first sleeve, an oil inlet on the outer side of the second sleeve, a second valve core slidably connected inside the second sleeve, a slot on one side of the second valve core, a hole communicating with the slot on the top of the second valve core, an oil outlet on the outer side of the first sleeve, and the first valve core slidably connected inside the first sleeve.

[0007] As a further embodiment of this utility model, a first spring is provided inside the first sleeve, one end of the first spring is in contact with the top of the first valve core, and the other end is in contact with the top inner wall of the first sleeve, and a second spring is provided at the bottom of the second valve core.

[0008] As a further improvement of this invention, a knob is fixedly connected to the top of the fixing column.

[0009] As a further improvement of this utility model, the outer side of the fixing column is provided with spiral patterns.

[0010] As a further embodiment of this invention, two retaining rings are fixedly connected to the outer side of the fixed column.

[0011] As a further embodiment of this utility model, a groove is provided on the outer side of the first sleeve, and a carbon ring is provided in the groove.

[0012] As a further embodiment of this utility model, a first oil return port is provided on the outer side of the first sleeve, and a second oil return port is provided on the outer side of the second sleeve.

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

[0014] 1. This utility model achieves the split design of the pressure compensation valve by using a first sleeve and a second sleeve in cooperation, which enables the pressure compensation valve to be installed and maintained separately, thereby improving the reliability and convenience of the pressure compensation valve.

[0015] 2. This utility model, through the coordinated use of an oil inlet and multiple oil outlets, allows the oil in the first and second sleeves to be discharged smoothly, thereby realizing the treatment of hydraulic pressure, effectively relieving oil pressure, and improving overall performance. Attached Figure Description

[0016] Figure 1 A front three-dimensional structural diagram of a split-type pressure compensation valve according to Embodiment 1 of this utility model is provided;

[0017] Figure 2 A partial cross-sectional view of a split-type pressure compensation valve according to Embodiment 1 of this utility model is provided.

[0018] Figure 3 A partially exploded structural diagram of a split-type pressure compensation valve according to Embodiment 1 of this utility model is provided.

[0019] Figure 4 This is a partial exploded structural diagram of a split-type pressure compensation valve according to Embodiment 2 of this utility model.

[0020] In the diagram: 1. Knob; 2. Fixing post; 3. Retaining ring; 4. Spiral pattern; 5. First sleeve; 6. Second sleeve; 7. Oil inlet; 8. Oil outlet; 9. Carbon ring; 10. Groove; 11. Second valve core; 12. Second spring; 13. Hole; 14. First spring; 15. First valve core; 16. First return port; 17. First return port. Detailed Implementation

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Therefore, all other embodiments of this application described herein, and all embodiments obtained by those skilled in the art without creative effort based on the embodiments in this application, should fall within the scope of protection of this application.

[0022] Example 1

[0023] Reference Figures 1-3 A split-type pressure compensation valve includes a fixed column 2, a first sleeve 5 welded to the bottom of the fixed column 2, and a knob 1 welded to the top of the fixed column 2.

[0024] The bottom of the first sleeve 5 is threadedly connected to the second sleeve 6. The outer side of the second sleeve 6 is provided with an oil inlet 7, which is sealed to the oil inlet pipe. The second sleeve 6 is slidably connected to the second valve core 11. The connection between the second valve core 11 and the second sleeve 6 is sealed. A slot 10 is provided on one side of the second valve core 11, and a hole 13 communicating with the slot 10 is provided on the top of the second valve core 11.

[0025] The first sleeve 5 and the second sleeve 6 are made of 304 stainless steel, with hard chrome plating on the inner wall and a surface roughness ≤ Ra0.8μm;

[0026] like Figure 3 As shown, the outer side of the first sleeve 5 is provided with an oil outlet 8 and a first oil return port 16. The oil outlet 8 is sealed and connected to the oil outlet pipe, and the first oil return port 16 is sealed and connected to the first oil return pipe. The first oil return pipe is sealed and connected to the oil tank.

[0027] The first sleeve 5 is slidably connected to the first valve core 15. The connection between the first valve core 15 and the first sleeve 5 is sealed. The first valve core 15 has an I-shaped structure. The first sleeve 5 is provided with a first spring 14. One end of the second spring 14 contacts the top of the first valve core 15, and the other end contacts the inside of the top of the first sleeve 5. The first oil return port 16 is located above the oil outlet 8. The second sleeve 6 is rotated into the first sleeve 5 to fix it.

[0028] When oil is supplied normally and the pressure is normal, the oil will flow from the oil inlet 7 into the second sleeve 6. The oil will then flow through the slot 10 and through the hole 13 into the first sleeve 5. When the oil reaches the first sleeve 5, it will squeeze the first valve core 15, and the first spring 14 will be compressed until it leaks out of the oil outlet 8. After the oil is discharged, the first spring 14 will reset the first valve core 15 to its original position by its own properties.

[0029] When the oil flow rate is large, a large amount of oil will flow from the oil inlet 7 into the second sleeve 6, causing the pressure to increase. The oil will flow from the slot 10 into the hole 13 into the first sleeve 5. When the oil reaches the first sleeve 5, the oil will squeeze the first valve core 15 and leak out of the oil outlet 8. Then it will be discharged through the oil outlet 8. The greater pressure will continue to squeeze the first valve core 15 until it leaks out of the first return oil port 16. The oil will flow back to the oil tank from the first return oil port 16.

[0030] That is, the oil pressure reaches its maximum value when it squeezes the first valve core 15 to leak out of the first return port 16.

[0031] In this utility model, a spiral pattern 4 is opened on the outer side of the fixing post 2, and two retaining rings 3 are welded on the outer side of the fixing post 2. The spiral pattern 4 is aligned with the threaded hole on the machine, and the knob 1 on the fixing post 2 is turned so that the bottom of the retaining ring 3 contacts the outer side of the threaded hole on the machine, thereby fixing the first sleeve 5. A groove is opened on the outer side of the first sleeve 5, and a carbon ring 9 is provided in the groove. The carbon ring 9 is usually made of graphite or carbon composite material, which has the characteristics of good self-lubrication, high temperature resistance, and wear resistance. The hardness is HB200, and the opening gap is ≤0.1mm to balance sealing performance and wear resistance.

[0032] Carbon ring 9 is generally an open ring structure, which forms a sealing barrier through its own elasticity.

[0033] Working principle: After the device is connected to the outer wall, when the oil is inlet normally and the pressure value is normal, the oil will flow from the oil inlet 7 into the second sleeve 6. The oil will flow from the slot 10 into the hole 13 into the first sleeve 5. When the oil reaches the first sleeve 5, the oil will squeeze the first valve core 15, and the first spring 14 will be in a compressed state until it leaks out of the oil outlet 8. Then it will be discharged through the oil outlet 8. After the oil is discharged, the first spring 14 will reset the first valve core 15 to its original position by its own performance.

[0034] When the oil flow rate is large, a large amount of oil will flow from the inlet 7 into the second sleeve 6, causing the pressure to increase. The oil will then flow from the slot 10 into the hole 13 into the first sleeve 5. When the oil reaches the first sleeve 5, it will squeeze the first valve core 15 and leak out through the outlet 8. The oil will then be discharged through the outlet 8. The higher pressure will continue to squeeze the first valve core 15 until it leaks out through the first return port 16. The oil will then flow back to the oil tank through the first return port 16, thereby reducing the pressure value and allowing the oil circuit to return to normal, thus completing the compensation.

[0035] Example 2

[0036] Reference Figure 4

[0037] A second spring 12 is placed at the bottom of the second sleeve 6. The other end of the second spring 12 contacts the bottom end of the second valve core 11. A second oil return port 17 is opened on the outside of the second sleeve 6. The second oil return port 17 is sealed and connected to the second oil return pipe. The second oil return pipe is sealed and connected to the oil tank. The second oil return port 17 is located below the second valve core 11.

[0038] When oil is supplied normally and the pressure is normal, the oil will flow from the oil inlet 7 into the second sleeve 6. The oil will then flow through the slot 10 and through the hole 13 into the first sleeve 5. When the oil reaches the first sleeve 5, it will squeeze the first valve core 15, and the first spring 14 will be compressed until it leaks out of the oil outlet 8. After the oil is discharged, the first spring 14 will reset the first valve core 15 to its original position by its own properties.

[0039] When the oil flow rate is large, the oil will flow from the oil inlet 7 into the second sleeve 6 in large quantities, causing the pressure to increase. At this time, the oil will flow from the slot 10 into the hole 13 into the first sleeve 5. When the oil reaches the first sleeve 5, the oil will squeeze the first valve core 15, leak out of the oil outlet 8, and then be discharged through the oil outlet 8.

[0040] However, due to the large oil intake, the oil cannot be discharged in time and will be preferentially stored in the second sleeve 6, and is located in the space enclosed by the second valve core 11 and the second sleeve 6. At this time, the second valve core 11 begins to squeeze the second spring 12 due to the gravity of the oil until the second oil return port 17 leaks out. The oil flows back to the oil tank from the second oil return port 17, thereby reducing the pressure value, so that the oil circuit returns to normal and the compensation is completed.

[0041] That is, the oil pressure reaches its maximum value when it squeezes the second valve core 11 to the second return port 17 and leaks out.

[0042] The stiffness coefficients of the first spring 14 and the second spring 12 are 1-30 N / mm, and the pre-compression is 2-10 mm, ensuring that the oil pressure is stably adjusted within the range of 0.5-15 MPa.

[0043] This utility model has been described through the above embodiments. Those skilled in the art will understand that this utility model is not limited to the above embodiments. Many more modifications can be made based on the teachings of this utility model, and all such modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A split-type pressure compensation valve, comprising a fixed column (2), characterized in that, The bottom of the fixed column (2) is fixedly connected to a first sleeve (5), the bottom of the first sleeve (5) is threadedly connected to a second sleeve (6), an oil inlet (7) is opened on the outside of the second sleeve (6), a second valve core (11) is slidably connected inside the second sleeve (6), a slot (10) is opened on one side of the second valve core (11), a hole (13) communicating with the slot (10) is opened on the top of the second valve core (11), an oil outlet (8) is opened on the outside of the first sleeve (5), and a first valve core (15) is slidably connected inside the first sleeve (5).

2. A split-type pressure compensating valve according to claim 1, characterized in that, The first sleeve (5) is provided with a first spring (14), one end of the first spring (14) is in contact with the top of the first valve core (15), and the other end is in contact with the top inner wall of the first sleeve (5). The bottom of the second valve core (11) is provided with a second spring (12).

3. A split-type pressure compensating valve according to claim 1, characterized in that, A knob (1) is fixedly connected to the top of the fixed column (2).

4. A split-type pressure compensating valve according to claim 3, characterized in that, Spiral patterns (4) are formed on the outer side of the fixed column (2).

5. A split-type pressure compensating valve according to claim 4, characterized in that, Two retaining rings (3) are fixedly connected to the outside of the fixed column (2).

6. A split-type pressure compensating valve according to claim 4, characterized in that, The outer side of the first sleeve (5) is provided with a groove, and a carbon ring (9) is provided in the groove.

7. A split-type pressure compensating valve according to claim 1, characterized in that, The first sleeve (5) has a first oil return port (16) on its outer side, and the second sleeve (6) has a second oil return port (17) on its outer side.

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