Water medium single hydraulic prop

Abstract

The utility model relates to the technical field of hydraulic mechanical equipment, and provides a water medium single hydraulic prop which comprises a base, a piston rod, a cylinder seat, a piston, a safety valve, a cylinder body, a cylinder cap and a one-way valve. The bottom end of the piston rod is arranged on the base, the piston and the safety valve are installed at the top end of the piston rod and are arranged in the cylinder body in a sealed and sleeved mode, and the cylinder cap is arranged at the top end of the cylinder body; a valve seat is arranged on the outer side of the cylinder body, a water inlet and outlet channel is formed in the valve seat and communicated with the interior of the cylinder body, an opening of the valve seat faces downwards, and the one-way valve is arranged in the valve seat. The piston rod and the cylinder body are made of high-strength alloy steel, and tungsten alloy coatings are plated on the outer surfaces of the piston rod and the cylinder body. By arranging the valve seat with the opening facing downwards, the one-way valve can be effectively protected, and normal use of the hydraulic prop is guaranteed; the piston rod and the cylinder body are made of high-strength alloy steel parts and have the advantages of being high in strength, material-saving, wear-resistant and corrosion-resistant, and the anti-corrosion capacity of the piston rod and the cylinder body is further guaranteed in cooperation with the tungsten alloy plating layers arranged on the outer surfaces of the piston rod and the cylinder body.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic mechanical equipment, and more specifically, relates to a water medium monomer hydraulic support. Background Art

[0002] The mining single hydraulic prop is a kind of support equipment widely used in underground mines, and its working medium is mainly emulsion. Emulsion is not only costly, but also polluting to the environment. At present, the mining single hydraulic prop directly discharges the emulsion on site during the recycling process, which pollutes the environment of the mining area, especially the groundwater quality. Due to the large-scale use of hydraulic props, the pollution problem of emulsion on the mining environment has attracted people's attention.

[0003] For this reason, many existing hydraulic supports use clean water as the medium; however, the existing hydraulic supports are made of iron or steel materials as a whole, with complex structure, large size, heavy weight, and the cylinder body and the upper part of the piston rod are exposed to the external environment, which is prone to rust. The one-way valve is directly exposed horizontally outside the support and is easily damaged by impacts such as rocks, resulting in the hydraulic support being unable to release pressure normally. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned prior art that the hydraulic support is prone to rust and the one-way valve is easily damaged, the purpose of the embodiment of the present application is to provide a water-medium monomer hydraulic support, which has the advantages of strong anti-rust ability and good protection of the one-way valve.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a water medium single hydraulic support, including: a base, a piston rod, a cylinder seat, a piston, a safety valve, a cylinder body, a cylinder cap and a one-way valve, the bottom end of the piston rod is arranged on the base, the top end of the piston rod is installed with a piston and a safety valve and is sealed and sleeved in the cylinder body, the top end of the cylinder body is provided with a cylinder cap, the outer side of the cylinder body is provided with a valve seat, the valve seat has an inlet and outlet channel and is connected with the cylinder body, the opening of the valve seat faces downward, and the one-way valve is arranged in the valve seat; the piston rod and the cylinder body are both made of high-strength alloy steel and the outer surfaces are plated with tungsten alloy coating.

[0006] In one embodiment, a cylinder seat is provided on the outer side of the lower end of the cylinder body through a locking screw, an annular groove is formed between the cylinder seat and the piston rod, a centering sleeve is provided in the cylinder seat, the centering sleeve and the lower end of the cylinder body are both located in the annular groove, and the centering sleeve is located between the piston rod and the cylinder body so that there is a gap between the piston rod and the cylinder body.

[0007] In one embodiment, the safety valve is fixed in the piston, and the piston includes a small diameter end and a large diameter end. The small diameter end is inserted into the piston rod, and a sealing ring is provided between the lower end surface of the large diameter end and the upper end surface of the piston rod. A UN-type sealing ring is provided on the sealing ring, and the UN-type sealing ring seals between the cylinder body and the piston.

[0008] In one embodiment, a plug cap is fixed to the upper end of the piston via a first elastic cylindrical pin, and the plug cap is wedge-shapedly assembled with the piston.

[0009] In one embodiment, a protective tube is provided on the outer side of the cylinder.

[0010] In one embodiment, the protection tube is a PP protection tube.

[0011] In one embodiment, the sealing retaining ring is made of aluminum alloy, and the UN-type sealing rings are all made of polyurethane material.

[0012] In one embodiment, the piston is fixed to the upper end of the piston rod by a plurality of second elastic cylindrical pins.

[0013] In one embodiment, the lower end of the piston rod is fixed to the base via a plurality of third elastic cylindrical pins.

[0014] In one embodiment, a handle is provided on the outer side of the cylinder cap.

[0015] The beneficial effects of the water-medium monomer hydraulic support provided by the present application are as follows: compared with the prior art, the water-medium monomer hydraulic support of the present application can effectively protect the one-way valve by setting the valve seat with the opening facing downward, thereby preventing the one-way valve from being damaged by impact and ensuring the normal use of the hydraulic support; the piston rod and the cylinder body are both made of high-strength alloy steel material, which has the advantages of light weight and corrosion resistance, and the tungsten alloy coating arranged on the outer surface further ensures its anti-corrosion ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic cross-sectional view of a water medium monomer hydraulic support provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1The enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0020] Figure 4 This is a schematic diagram of the top view of the handle in the water medium single hydraulic support provided in this embodiment.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Base; 2. Third elastic cylindrical pin; 3. Cylinder seat; 4. Locking screw; 5. Centering sleeve; 6. Piston rod; 7. Protective tube; 8. Safety valve; 9. Second elastic cylindrical pin; 10. Piston; 11. Sealing ring; 12. UN type sealing ring; 13. Plug cap; 14. Cylinder body; 15. Valve seat; 16. First elastic cylindrical pin; 17. One-way valve; 18. Cylinder cap; 19. Handle. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] like Figure 1-Figure 4As shown, a water medium monomer hydraulic prop provided by an embodiment of the present application is now described. The water medium monomer hydraulic prop comprises: a base 1, a piston rod 6, a cylinder seat 3, a piston 10, a safety valve 8, a cylinder body 14, a cylinder cap 18 and a one-way valve 17. The piston rod 6 and the cylinder body 14 are both hollow structures with openings at both ends. The bottom end of the piston rod 6 is arranged on the base 1, and the top end of the piston rod 6 is equipped with a piston 10 and a safety valve 8 and is sealed in the cylinder body 14, so that the lower end of the cylinder body 14 is movably sealed and connected to the piston rod 6, and the top end of the cylinder body 14 is provided with a cylinder cap 18, so that the top end of the cylinder body 14 is closed. A valve seat 15 is provided on the outer side of the cylinder body 14. The valve seat 15 has an inlet and outlet channel and is connected to the cylinder body 14. The opening of the valve seat 15 faces downward. A one-way valve 17 is provided in the valve seat 15. The one-way valve 17 plays a protective role through the valve seat 15. The piston rod 6 and the cylinder body 14 are both made of high-strength alloy steel and the outer surfaces are plated with tungsten alloy coatings, which have the advantages of light weight and strong corrosion resistance.

[0028] like Figure 2 As shown, in the present embodiment, in order to reduce the friction between the cylinder body 14 and the piston rod 6, a cylinder seat 3 is provided on the outer side of the lower end of the cylinder body 14 through a locking screw 4, an annular groove is formed between the cylinder seat 3 and the piston rod 6, a centering sleeve 5 is provided in the cylinder seat 3, the centering sleeve 5 and the lower end of the cylinder body 14 are both located in the annular groove, the centering sleeve 5 is located between the piston rod 6 and the cylinder body 14 so that there is a gap between the piston rod 6 and the cylinder body 14, so that the contact area between the piston rod 6 and the cylinder body 14 is reduced, and the sliding friction is reduced.

[0029] like Figure 3 As shown, in this embodiment, the piston 10 is a hollow structure, and the safety valve 8 is fixed in the piston 10 to block the inner channel of the piston 10. As long as the pressure reaches a predetermined value, the safety valve 8 will release the pressure, and the water medium in the cylinder body 14 will flow into the piston rod 6 to release the pressure. The piston 10 includes a small diameter end and a large diameter end. The small diameter end is inserted into the piston rod 6. A sealing ring 11 is provided between the lower end surface of the large diameter end and the upper end surface of the piston rod 6. The sealing ring 11 is provided with a UN-type sealing ring 12, and the UN-type sealing ring 12 is sealed between the cylinder body 14 and the piston 10; the sealing ring 11 is used to fix the position of the UN-type sealing ring 12, and the UN-type sealing ring 12 is used to achieve a movable seal between the cylinder body 14 and the piston 10; the opening of the UN-type sealing ring 12 faces upward, so that it can be deformed and stretched when subjected to the pressure of the water medium to play a good sealing role for the cylinder body 14 and the piston 10.

[0030] Specifically, a plug cap 13 is fixed to the upper end of the piston 10 through a first elastic cylindrical pin 16 . The plug cap 13 is wedge-assembled with the piston 10 . The function of the plug cap 13 is to prevent the UN-type sealing ring 12 from shifting during the lifting and lowering process of the piston 10 .

[0031] Specifically, a protective tube 7 is provided on the outer side of the cylinder body 14 . The protective tube 7 is a polypropylene protective tube, referred to as a PP protective tube, to protect the outer side of the cylinder body 14 and prevent the outer coating of the cylinder body 14 from being scratched.

[0032] In this embodiment, the sealing ring 11 is made of aluminum alloy, and the UN-type sealing ring 12 is made of polyurethane.

[0033] In this embodiment, the piston 10 is fixed to the upper end of the piston rod 6 by a plurality of second elastic cylindrical pins 9. The lower end of the piston rod 6 is fixed to the base 1 by a plurality of third elastic cylindrical pins 2. A handle 19 is provided on the outer side of the cylinder cap 18, and the handle 19 is convenient for the staff to carry the hydraulic prop.

[0034] Specifically, the base 1 is a 45# steel part, the first elastic cylindrical pin 16, the second elastic cylindrical pin 9 and the third elastic cylindrical pin 2 are all martensitic stainless steel parts; the cylinder seat 3 is an aluminum alloy 7075 part; the fastening screw is a stainless steel part; the centering sleeve 5 is a nylon part; the piston rod 6 is specifically a high-strength 27SiMn part, and the surface is plated with a nickel-tungsten alloy layer; the piston 10 is an aluminum alloy 7075 part, and the sealing retaining ring 11 is an aluminum alloy 7075 part; the plug cap 13 is an aluminum alloy 7075 part; the cylinder body 14 is a high-strength 27SiMn part, and the surface is plated with a nickel-tungsten alloy layer; the valve seat 15 is a 304 casting; the cylinder cap 18 is a ZG45 cast steel part, and the handle 19 is a Q235 steel part.

[0035] When working, the water medium hydraulic prop uses underground compressed air and groundwater as the power source. After the groundwater is filtered, it is pressurized by the pneumatic hydraulic booster pump to form high-pressure water. The high-pressure water is injected into the one-way valve 17 and then enters the cylinder body 14, pushing the cylinder body 14 upward relative to the piston rod 6; the cylinder cap 18 can be provided with an extension piece and a pressure-bearing support. The cylinder body 14 makes the cylinder cap 18, the extension piece and the pressure-bearing support move upward until they contact the mine roof to generate an initial support force. Its rated support force can reach 115KN and enter the working state. When the roof pressure is 1.1 times the safety pressure set by the safety valve 8, the safety valve 8 releases the pressure and the cylinder body 14 retracts; when the water medium is recovered to the hydraulic prop, the one-way valve 17 is remotely controlled by a waterproof gun to release the water in the cylinder body 14, so that the cylinder body 14 retracts and the hydraulic prop is reset to the initial state.

[0036] The water medium hydraulic support provided in this embodiment adopts a split combination design, which can reduce the weight of a single water medium hydraulic support and can flexibly match different cylinder bodies 14 or piston rods 6 according to different mining widths to adapt to different support heights, which can effectively reduce costs and improve adaptability.

[0037] The cylinder body 14 and the piston rod 6 of the present embodiment are made of a rigid alloy material and are plated with a tungsten alloy coating on the surface to improve corrosion resistance and wear resistance, thereby ensuring high support strength and deformation resistance.

[0038] The water medium hydraulic prop of this embodiment adopts more alloy materials, and the overall weight is light, at 20-22.5KG, and can be lifted by a single hand by the staff, which is convenient for transportation and recycling, and reduces the labor intensity. And because of its good anti-corrosion and supporting ability, it can be reused, generally can be used for more than 5 years or the number of uses can reach more than 2000 times, which is economical and practical.

[0039] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A water medium single hydraulic prop, comprising: A base (1), a piston rod (6), a cylinder seat (3), a piston (10), a safety valve (8), a cylinder body (14), a cylinder cap (18) and a one-way valve (17), wherein the bottom end of the piston rod (6) is arranged on the base (1), the top end of the piston rod (6) is equipped with a piston (10) and a safety valve (8) and is sealed and sleeved in the cylinder body (14), and the top end of the cylinder body (14) is provided with a cylinder cap (18), characterized in that a valve seat (15) is provided on the outer side of the cylinder body (14), the valve seat (15) has an inlet and outlet channel and is connected to the cylinder body (14), the opening of the valve seat (15) faces downward, and the one-way valve (17) is arranged in the valve seat (15); the piston rod (6) and the cylinder body (14) are both made of high-strength alloy steel and the outer surfaces are both plated with a tungsten alloy coating.

2. The water medium single hydraulic prop according to claim 1, characterized in that: A cylinder seat (3) is provided on the outer side of the lower end of the cylinder body (14) via a locking screw (4); an annular groove is formed between the cylinder seat (3) and the piston rod (6); a centering sleeve (5) is provided inside the cylinder seat (3); the lower ends of the centering sleeve (5) and the cylinder body (14) are both located in the annular groove; the centering sleeve (5) is located between the piston rod (6) and the cylinder body (14) so ​​that there is a gap between the piston rod (6) and the cylinder body (14).

3. The water medium single hydraulic prop according to claim 2, characterized in that: The safety valve (8) is fixed in the piston (10). The piston (10) comprises a small diameter end and a large diameter end. The small diameter end is inserted into the piston rod (6). A sealing ring (11) is provided between the lower end surface of the large diameter end and the upper end surface of the piston rod (6). A UN-type sealing ring (12) is provided on the sealing ring (11). The UN-type sealing ring (12) seals between the cylinder body (14) and the piston (10).

4. The water medium single hydraulic prop according to claim 3, characterized in that: A plug cap (13) is fixed to the upper end of the piston (10) via a first elastic cylindrical pin (16), and the plug cap (13) is wedge-fitted to the piston (10).

5. The water medium single hydraulic prop according to claim 3, characterized in that: A protection tube (7) is provided on the outer side of the cylinder body (14).

6. The water medium single hydraulic prop according to claim 5, characterized in that: The protection tube (7) is a PP protection tube.

7. The water medium single hydraulic prop according to claim 5, characterized in that: The sealing retaining ring (11) is made of aluminum alloy, and the UN-type sealing ring (12) is made of polyurethane.

8. The water medium single hydraulic prop according to claim 7, characterized in that: The piston (10) is fixed to the upper end of the piston rod (6) via a plurality of second elastic cylindrical pins (9).

9. The water medium single hydraulic prop according to claim 8, characterized in that: The lower end of the piston rod (6) is fixed to the base (1) via a plurality of third elastic cylindrical pins (2).

10. The water medium single hydraulic prop according to claim 9, characterized in that: A handle (19) is provided on the outer side of the cylinder cap (18).

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