Hydraulic control one-way valve

Abstract

The hydraulic control one-way valve comprises a valve body and a valve element assembly, the valve element assembly comprises an ejector rod, a liquid inlet sleeve, a valve sleeve, a large valve element, a small valve element and a first spring used for applying elastic acting force to the small valve element, and the small valve element comprises a first guide section, a sealing section and a second guide section which are sequentially arranged. The second guide section is sleeved with the first spring, a guide hole allowing the second guide section to be inserted therein is formed in the valve sleeve, and a first liquid passing channel used for guiding liquid in the liquid inlet sleeve into the valve sleeve is formed in the first guide section. According to the hydraulic control one-way valve, the guide hole is formed in the valve sleeve to guide the small valve element to move, so that the valve sleeve can support the small valve element, the small valve element cannot deflect in the moving process, the spring is not prone to lateral bending and breakage, and reliability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine fully-mechanized mining hydraulic supports, and in particular, the utility model relates to a hydraulically controlled one-way valve. Background Art

[0002] As coal mining technology develops towards large and ultra-large mining heights, the support height of hydraulic supports has also been increasing, from 5.5m to 7m and 8.8m, and then to the latest 10m. The support strength and difficulty are getting greater and greater, requiring the hydraulic support column jack to have a large flow rate of liquid flow capacity to meet the requirements of rapid lowering, moving and raising of the support. At the same time, it is also required that the column jack reduce pressure shock and vibration when the flow rate is large. In recent years, the coal mining industry has been gradually improving, and the application of large supports has become more and more extensive. Large supports urgently need column hydraulic control one-way valves with large flow and reliable performance to control lifting and lowering.

[0003] For example, the patent document with publication number CN107514273A discloses a column hydraulically controlled one-way valve, including a valve body, a screw sleeve, a valve sleeve, a push rod, a large valve core and a small valve core arranged inside the valve sleeve, a liquid inlet sleeve sleeved on the push rod and located between the screw sleeve and the valve sleeve, and a valve seat arranged inside the liquid inlet sleeve and used to cooperate with the large valve core to achieve sealing, and the valve seat and the large valve core are made of metal material.

[0004] In the above-mentioned structure of the column hydraulic control one-way valve, the end of the small valve core is a triangular structure, and the small valve core is a movable setting. There is a gap between the triangular end of the small valve core and the large valve core. When liquid flows between the triangular end of the small valve core and the large valve core, the movement trajectory of the small valve core is unstable and prone to deflection. The triangular end face has uneven liquid flow, which can also cause the spring to bend and break, affecting reliability. In addition, the small valve core with a triangular structure is not easy to process.

[0005] It is hoped to provide an improved hydraulically controlled one-way valve, particularly with regard to how to avoid spring deflection during movement of a small valve core and improve reliability. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a hydraulically controlled one-way valve, the purpose of which is to avoid the deflection of the spring during the movement of the small valve core and improve reliability.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a hydraulically controlled one-way valve, including a valve body and a valve core assembly, the valve core assembly including a push rod, a liquid inlet sleeve, a valve sleeve, a large valve core, a small valve core and a first spring for applying an elastic force to the small valve core, the small valve core including a first guide section, a sealing section and a second guide section which are arranged in sequence, the first spring sleeve is arranged on the second guide section, the valve sleeve is provided with a guide hole for inserting the second guide section, and the first guide section is provided with a first liquid passage channel for guiding the liquid in the liquid inlet sleeve to the valve sleeve.

[0008] The first liquid passage includes a first liquid passage hole and a second liquid passage hole. The first liquid passage hole is communicated with the inner cavity of the liquid inlet sleeve, and the second liquid passage hole is communicated with the first liquid passage hole.

[0009] The first liquid-passing hole extends along the axial direction of the first guide section, and the second liquid-passing hole extends from the inner circumferential surface of the first liquid-passing hole to the outer circumferential surface of the first guide section.

[0010] A plurality of the second liquid passage holes are provided.

[0011] The push rod is provided with a second liquid passage for guiding the liquid in the liquid inlet sleeve to the first liquid passage.

[0012] The second liquid passage includes a third liquid passage hole and a fourth liquid passage hole. The third liquid passage hole is communicated with the first liquid passage, and the fourth liquid passage hole is communicated with the inner cavity of the liquid inlet sleeve.

[0013] The third liquid passage hole extends along the axial direction of the push rod, and the fourth liquid passage hole extends from the inner circumferential surface of the third liquid passage hole to the outer circumferential surface of the push rod.

[0014] The fourth liquid passage holes are provided in plurality.

[0015] The first spring is a rectangular spring.

[0016] The push rod is sleeved with a second spring, which is a rectangular spring.

[0017] The hydraulically controlled one-way valve of the utility model guides the small valve core to move by arranging a guide hole on the valve sleeve, so that the valve sleeve can provide support for the small valve core, the small valve core will not deflect during movement, the spring is not prone to lateral bending and fracture, and reliability is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification includes the following drawings, which show the following contents:

[0019] Figure 1 It is a cross-sectional view of the hydraulically controlled one-way valve of the utility model;

[0020] Figure 2is a cross-sectional view of the valve core assembly;

[0021] Figure 3 It is a cross-sectional view of the small valve core;

[0022] Figure 4 is a cross-sectional view of the ejector pin;

[0023] Markings in the figure are: 1, screw sleeve; 2, push rod; 201, third liquid hole; 202, fourth liquid hole; 3, second spring; 4, liquid inlet sleeve; 5, valve seat; 6, large valve core; 7, small valve core; 701, first liquid hole; 702, second liquid hole; 703, first guide section; 704, second guide section; 705, sealing section; 706, fifth liquid hole; 707, sixth liquid hole; 78, first spring; 9, valve sleeve; 10, valve body; 11, guide hole. DETAILED DESCRIPTION

[0024] The specific implementation methods of the utility model are further explained in detail below with reference to the accompanying drawings through the description of embodiments, with the aim of helping technicians in the field to have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model and facilitating its implementation.

[0025] It should be noted that, in the following embodiments, the "first", "second", "third", "fourth", "fifth" and "sixth" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0026] like Figures 1 to 4As shown, the utility model provides a hydraulically controlled one-way valve, including a valve body 10 and a valve core assembly, the valve core assembly including a screw sleeve 1, a valve sleeve 9, a push rod 2, a first spring 8, a second spring 3, a large valve core 6 and a small valve core 7 arranged inside the valve sleeve 9, a liquid inlet sleeve 4 sleeved on the push rod 2 and located between the screw sleeve 1 and the valve sleeve 9, and a valve seat 5 arranged inside the liquid inlet sleeve 4 and used to cooperate with the large valve core 6 to achieve sealing. The valve sleeve 9, the large valve core 6, the small valve core 7, the liquid inlet sleeve 4, the screw sleeve 1, the valve seat 5, the second spring 3 and the first spring 8 constitute a plug-in valve core assembly, the valve core assembly is an integrated structure, the screw sleeve 1 and the liquid inlet sleeve 4 are sleeved on the push rod 2, the large valve core 6 and the small valve core 7 are arranged inside the valve sleeve 9, the push rod 2 is used to apply axial pressure to the large valve core 6 and the small valve core 7, the push rod 2 can push the large valve core 6 and the small valve core 7 to move toward the inside of the valve sleeve 9, so that the large valve core 6 is separated from the valve seat 5, and the one-way valve is opened. The screw sleeve 1 is threadedly connected to the valve body 10, the liquid inlet sleeve 4 is sandwiched between the screw sleeve 1 and the valve sleeve 9, and the liquid inlet sleeve 4 is fixedly connected to the screw sleeve 1 and the valve sleeve 9, the valve sleeve 9 is used to limit the large valve core 6 in the axial direction, the screw sleeve 1 is used to limit the push rod 2 in the axial direction, and the screw sleeve 1 and the valve body 10 are also used to connect with the external column jack. The first spring 8 is used to apply elastic force to the small valve core 7 , and the large valve core 6 is sleeved on the small valve core 7 .

[0027] like Figures 1 to 3 As shown, the small valve core 7 includes a first guide section 703, a sealing section 705 and a second guide section 704 arranged in sequence, a first sealing surface is arranged on the sealing section 705, and a second sealing surface in contact with the first sealing surface is arranged on the large valve core 6, the first sealing surface is a conical surface, and after the first sealing surface contacts the second sealing surface, the hydraulically controlled one-way valve is closed. The first guide section 703, the sealing section 705 and the second guide section 704 are coaxially fixedly connected, the first guide section 703 and the second guide section 704 are cylindrical, and the maximum outer diameter of the sealing section 705 is greater than the outer diameters of the first guide section 703 and the second guide section 704. A first center hole and a second center hole are arranged in the large valve core 6. The first center hole and the second center hole are arranged coaxially. The first center hole and the second center hole are connected and the diameter of the first center hole is smaller than the diameter of the second center hole. The first guide section 703 is inserted into the first center hole. The sealing section 705 and the second guide section 704 are located in the second center hole. The diameter of the second center hole is larger than the outer diameter of the sealing section 705 and the second guide section 704. The outer diameter of the first guide section 703 is the same as the diameter of the first center hole. The outer circumference of the large valve core 6 contacts the inner circumference of the valve sleeve 9. The valve sleeve 9 guides the large valve core 6. The inner circumference of the valve sleeve 9 is a cylindrical surface whose diameter is kept constant along the axial direction. The outer circumference of the first guide section 703 is a cylindrical surface whose diameter is kept constant along the axial direction. The outer diameter of the first guide section 703 is the same as the diameter of the first center hole. The first guide section 703 is arranged in the first liquid passage for guiding the liquid in the liquid inlet sleeve 4 to the valve sleeve 9.

[0028] like Figures 1 to 3 As shown, the first spring 8 is sleeved on the second guide section 704, and the valve sleeve 9 is provided with a guide hole 11 for inserting the second guide section 704. The guide hole 11 is a circular hole provided at the center of the inner wall surface of the valve sleeve 9 facing the sealing section 705. The diameter of the guide hole 11 is the same as that of the second guide section 704. One end of the second guide section 704 is fixedly connected to the sealing section 705, and the other end of the second guide section 704 is inserted into the guide hole 11. The first spring 8 is sandwiched between the sealing section 705 and the inner wall surface of the valve sleeve 9. By providing the guide hole 11 on the valve sleeve 9 to guide the small valve core 7 to move, the valve sleeve 9 can provide support for the small valve core 7, and the small valve core 7 will not deflect during the movement. Under high-pressure conditions, the first spring 8 is not prone to lateral bending and fracture, thereby improving reliability.

[0029] like Figure 2 and Figure 3 As shown, the first liquid passage channel includes a first liquid passage hole 701 and a second liquid passage hole 702. The first liquid passage hole 701 is connected to the inner cavity of the liquid inlet sleeve 4, and the second liquid passage hole 702 is connected to the first liquid passage hole 701. The first liquid passage hole 701 extends from the end surface of the first guide section 703 facing the ejector 2 along the axial direction of the first guide section 703 to the inside of the first guide section 703. The first liquid passage hole 701 is a circular hole arranged at the center of the first guide section 703. The second liquid passage hole 702 extends from the inner circumferential surface of the first liquid passage hole 701 to the outer circumferential surface of the first guide section 703. The second liquid passage hole 702 extends along the radial direction of the first guide section 703. A plurality of second liquid passage holes 702 are arranged, and all the second liquid passage holes 702 are evenly distributed along the circumferential direction with the axis of the first liquid passage hole 701 as the center line.

[0030] like Figures 2 to 4 As shown, the mandrel 2 is provided with a second liquid passage for guiding the liquid in the liquid inlet sleeve 4 to the first liquid passage. The second liquid passage includes a third liquid passage hole 201 and a fourth liquid passage hole 202. The third liquid passage hole 201 is connected to the first liquid passage, and the fourth liquid passage hole 202 is connected to the inner cavity of the liquid inlet sleeve 4. The third liquid passage hole 201 extends from the end surface of the mandrel 2 facing the small valve core 7 along the axial direction of the mandrel 2 to the inside of the mandrel 2. The third liquid passage hole 201 is located at the center of the mandrel 2. The third liquid passage hole 201 and the first liquid passage hole 701 are coaxially arranged. The fourth liquid passage hole 202 extends from the inner circumferential surface of the third liquid passage hole 201 to the outer circumferential surface of the mandrel 2. The fourth liquid passage hole 202 extends along the radial direction of the mandrel 2. A plurality of fourth liquid passage holes 202 are provided, and all fourth liquid passage holes 202 are evenly distributed along the circumferential direction with the axis of the third liquid passage hole 201 as the center line.

[0031] The fourth liquid hole 202 is used to guide the liquid entering the inner cavity of the liquid inlet sleeve 4 to the third liquid hole 201. After the end surface of the push rod 2 contacts the small valve core 7, the small valve core 7 is pushed to move, so that the small valve core 7 is separated from the large valve core 6. The liquid in the third liquid hole 201 enters the first liquid hole 701, and then flows into the inner cavity of the valve sleeve 9 through the second liquid hole 702. With this structure, there is no gap between the outer circumference of the first guide section 703 of the small valve core 7 and the inner circumference of the large valve core 6, the small valve core 7 will not deflect during the movement, the first spring 8 is not easy to bend or break, the reliability is improved, the liquid inlet is uniform, and the small valve core 7 is also easy to process.

[0032] like Figure 2 and Figure 3 As shown, the first spring 8 is a rectangular spring and a compression spring. Under the same space conditions, the rectangular cross-section has a greater stiffness and a smaller volume than the spiral compression spring, which can reduce the occupied space and ensure that the hydraulically controlled one-way valve is closed in time, thereby improving working reliability.

[0033] The second guide section 704 is located in the second center hole of the large valve core 6. The length of the second guide section 704 is smaller than the length of the second center hole. After the push rod 2 pushes the small valve core 7 to move to the extreme position, the first spring 8 is in a compressed state and the length of the first spring 8 at this time is smaller than the valve core space. The distance between the second guide section 704 and the inner wall surface of the valve sleeve 9 is small, and the first spring 8 will not tilt or be broken.

[0034] like Figure 2 As shown, the second spring 3 is used to apply an elastic force to the push rod 2 to move it toward a position away from the small valve core 7. The second spring 3 is clamped between a limit surface set in the liquid inlet sleeve 4 and a step surface set on the push rod 2. The second spring 3 is a rectangular spring and a compression spring. Under the same spatial conditions, the rectangular cross-section has a greater stiffness and a smaller volume than the spiral compression spring, which can reduce the occupied space, ensure that the hydraulically controlled one-way valve is closed in time, and improve working reliability.

[0035] like Figures 1 to 3As shown, a third liquid passage is provided in the second guide section 704, and the third liquid passage includes a fifth liquid passage hole 706 and a sixth liquid passage hole 707. The fifth liquid passage hole 706 is connected to the positioning hole and the two are coaxial, and the sixth liquid passage hole 707 is connected to the fifth liquid passage hole 706. The fifth liquid passage hole 706 extends from the end surface of the second guide section 704 inserted into the positioning hole along the axial direction of the second guide section 704 to the inside of the second guide section 704. The fifth liquid passage hole 706 is a circular hole provided at the center of the second guide section 704. The sixth liquid passage hole 707 extends from the inner circumferential surface of the fifth liquid passage hole 706 to the outer circumferential surface of the second guide section 704. The sixth liquid passage hole 707 extends in the radial direction of the second guide section 704. A plurality of sixth liquid passage holes 707 are provided, and all the sixth liquid passage holes 707 are evenly distributed along the circumferential direction with the axis of the fifth liquid passage hole 706 as the center line, and the sixth liquid passage hole 707 is connected to the inner cavity of the valve sleeve 9.

[0036] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A hydraulically controlled one-way valve, comprising a valve body and a valve core assembly, wherein the valve core assembly comprises a push rod, a liquid inlet sleeve, a valve sleeve, a large valve core, a small valve core and a first spring for applying an elastic force to the small valve core, wherein the small valve core comprises a first guide section, a sealing section and a second guide section which are arranged in sequence, and wherein: The first spring sleeve is arranged on the second guide section, the valve sleeve is provided with a guide hole for inserting the second guide section, and the first guide section is provided with a first liquid passage in the valve sleeve for guiding the liquid in the liquid inlet sleeve to the first liquid passage in the valve sleeve.

2. The hydraulically controlled one-way valve according to claim 1, characterized in that: The first liquid passage includes a first liquid passage hole and a second liquid passage hole. The first liquid passage hole is communicated with the inner cavity of the liquid inlet sleeve, and the second liquid passage hole is communicated with the first liquid passage hole.

3. The hydraulically controlled one-way valve according to claim 2, characterized in that: The first liquid-passing hole extends along the axial direction of the first guide section, and the second liquid-passing hole extends from the inner circumferential surface of the first liquid-passing hole to the outer circumferential surface of the first guide section.

4. The hydraulically controlled one-way valve according to claim 2, characterized in that: A plurality of the second liquid passage holes are provided.

5. The hydraulically controlled one-way valve according to any one of claims 1 to 4, characterized in that: The push rod is provided with a second liquid passage for guiding the liquid in the liquid inlet sleeve to the first liquid passage.

6. The hydraulically controlled one-way valve according to claim 5, characterized in that: The second liquid passage includes a third liquid passage hole and a fourth liquid passage hole. The third liquid passage hole is communicated with the first liquid passage, and the fourth liquid passage hole is communicated with the inner cavity of the liquid inlet sleeve.

7. The hydraulically controlled one-way valve according to claim 6, characterized in that: The third liquid passage hole extends along the axial direction of the push rod, and the fourth liquid passage hole extends from the inner circumferential surface of the third liquid passage hole to the outer circumferential surface of the push rod.

8. The hydraulically controlled one-way valve according to claim 6, characterized in that: The fourth liquid passage holes are provided in plurality.

9. The hydraulically controlled one-way valve according to any one of claims 1 to 4, characterized in that: The first spring is a rectangular spring.

10. The hydraulically controlled one-way valve according to any one of claims 1 to 4, characterized in that: The push rod is sleeved with a second spring, which is a rectangular spring.

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