Anti-impact telescopic hydraulic stand column and anti-impact hydraulic support

Abstract

The utility model belongs to the technical field of hydraulic supports, and discloses an anti-impact telescopic hydraulic stand column and an anti-impact hydraulic support. The anti-impact telescopic hydraulic stand column comprises a stand column middle cylinder and an anti-impact piston, and one end of the stand column middle cylinder is arranged on a base; the anti-impact piston comprises a movable column barrel, a liquid passing pipe, a piston block and a movable column cylinder bottom, and the movable column barrel is arranged in the stand column middle cylinder; the liquid passing pipe is arranged in the movable column barrel, and one end of the liquid passing pipe is connected with one end of the movable column barrel; the plunger cylinder bottom is arranged at the other end of the liquid passing pipe and is connected with the other end of the plunger barrel; a gas-liquid channel is formed between the plunger barrel and the liquid passing pipe, and the piston block is arranged in the gas-liquid channel in a sliding mode and divides the gas-liquid channel into a gas phase space and a liquid phase space. A plurality of liquid through holes are formed in the plunger cylinder bottom and communicated with the stand column middle cylinder and the liquid phase space, and a pressure release valve is arranged at the end, away from the plunger cylinder bottom, of the plunger barrel and communicated with the gas phase space. The problems that compression of a spring has certain response time, a safety valve cannot be opened in time, impact energy cannot be released, and consequently a stand column expands are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hydraulic column, concretely relates to a kind of anti-impact telescopic hydraulic column and anti-impact hydraulic support. BACKGROUND

[0002] Hydraulic support is used for coal mine fully mechanized working face support, column is the main load-bearing component of hydraulic support, and the column is often affected by impact load during the support process of hydraulic support. At present, the protection structure is mainly protected by the opening and drainage of the safety valve of the column. The main problem of the safety valve protection is that the response time is not timely. The safety valve opens the drainage hole by using the compression of the spring. Since the compression of the spring has a certain response time, when the hydraulic support is subjected to a large impact, the pressure rise change time of the lower cavity of the column is less than the reaction time of the spring, the safety valve cannot be opened in time, and the impact energy cannot be released, thereby the column cylinder expansion phenomenon occurs.

[0003] At present, the existing technology, such as the Chinese utility model patent with publication number CN216240711U, discloses a new anti-impact column, which specifically discloses a column cylinder body, a telescopic piston is inserted and connected at the upper end opening of the column cylinder body, a liquid inlet is arranged at the lower end of the column cylinder body, a liquid return port is arranged at the upper end of the column cylinder body, and a pressure relief safety valve is further arranged at the lower end of the column cylinder body. An anti-impact energy absorption device is arranged at the lower side of the cylinder bottom of the column cylinder bottom. The design is reasonable, the structure is compact, the impact energy can be effectively absorbed, the structure of the hydraulic column is protected, the safety in use is good, the number of parts that need to be replaced is small, the parts are convenient to replace, the maintenance workload is small in the later period, the recovery support speed is fast, the production cost is low, and the problems of poor impact resistance of the existing hydraulic column, complex buffer structure, high manufacturing cost, large workload of column maintenance in the later period, high maintenance cost and long operation cycle of roadway recovery normal support are solved.

[0004] However, the safety valve opens the drainage hole by using the compression of the spring. Since the compression of the spring has a certain response time, when the hydraulic support is subjected to a large impact, the pressure rise change time of the lower cavity of the column is less than the reaction time of the spring, the safety valve cannot be opened in time, and the impact energy cannot be released, thereby the column cylinder expansion phenomenon occurs. SUMMARY

[0005] Therefore, the present application provides an anti-impact telescopic hydraulic column to solve the problem that the spring compression opens the drainage hole, the spring compression has a certain response time, when the hydraulic support is subjected to a large impact, the pressure rise change time of the lower cavity of the column is less than the reaction time of the spring, the safety valve cannot be opened in time, and the impact energy cannot be released, thereby the column cylinder expansion phenomenon occurs.

[0006] The technical solution of the present application to solve the above technical problems is as follows:

[0007] The anti-collision telescopic hydraulic column comprises a column middle cylinder and an anti-collision piston, one end of the column middle cylinder is arranged on the base of the support, the anti-collision piston comprises a column cylinder, a liquid passage, a piston block and a column cylinder bottom, the column cylinder is arranged in the column middle cylinder and can slide up and down along the inner wall of the column middle cylinder, the liquid passage is arranged in the column cylinder, one end of the liquid passage is connected with one end of the column cylinder, the column cylinder bottom is arranged at the other end of the liquid passage and is connected with the other end of the column cylinder, an air-liquid passage is formed between the column cylinder and the liquid passage, the piston block is slidably arranged in the air-liquid passage and divides the air-liquid passage into a gas phase space and a liquid phase space, the column cylinder bottom is provided with a plurality of liquid passage holes, the liquid passage holes are communicated with the column middle cylinder and the liquid phase space, and one end of the column cylinder away from the column cylinder bottom is provided with a pressure relief valve communicated with the gas phase space.

[0008] Preferably, the anti-collision telescopic hydraulic column further comprises a column outer cylinder, one end of the column outer cylinder is arranged on the base, the other end of the column outer cylinder is sleeved outside the column middle cylinder, and the column middle cylinder can slide up and down along the inner wall of the column outer cylinder.

[0009] Preferably, one end of the column outer cylinder is provided with a first limiting ring, one end of the column middle cylinder is provided with a first convex ring, and the first convex ring is limited and matched with the first limiting ring.

[0010] Preferably, one end of the column middle cylinder away from the first convex ring is provided with a second limiting ring, one end of the column cylinder bottom is provided with a second convex ring, and the second convex ring is limited and matched with the second limiting ring.

[0011] Preferably, a clamp groove is arranged on the outer wall of the column outer cylinder, and the clamp groove is used for detachably connecting the column outer cylinder with the base.

[0012] Preferably, one end of the column outer cylinder is provided with a hinged block, and the hinged block is detachably connected with the base.

[0013] Preferably, the hinged block is a spherical seat.

[0014] The anti-collision telescopic hydraulic column comprises a column middle cylinder and an anti-collision piston, one end of the column middle cylinder is arranged on the base of the support, the anti-collision piston comprises a column cylinder, a liquid passage, a piston block and a column cylinder bottom, the column cylinder is arranged in the column middle cylinder and can slide up and down along the inner wall of the column middle cylinder, the liquid passage is arranged in the column cylinder, one end of the liquid passage is connected with one end of the column cylinder, the column cylinder bottom is arranged at the other end of the liquid passage and is connected with the other end of the column cylinder, an air-liquid passage is formed between the column cylinder and the liquid passage, the piston block is slidably arranged in the air-liquid passage and divides the air-liquid passage into a gas phase space and a liquid phase space, the column cylinder bottom is provided with a plurality of liquid passage holes, the liquid passage holes are communicated with the column middle cylinder and the liquid phase space, and one end of the column cylinder away from the column cylinder bottom is provided with a pressure relief valve communicated with the gas phase space.

[0015] The technical scheme adopted in the present application can achieve the following beneficial effects:

[0016] 1. The problem of opening the drainage hole by compression of the spring, which has a certain response time, when the hydraulic support is subjected to a larger impact, the pressure in the lower chamber of the stand changes in a shorter time than the response time of the spring, the safety valve cannot be opened in time, and the impact energy cannot be released, resulting in the expansion of the cylinder of the stand.

[0017] 2. The gas is compressed by the sliding of the piston block, so that the inner cylinder of the stand is reduced and contracted, and the pressure in the inner cylinder is released through the pressure relief valve, which is more simple and convenient to operate and has higher safety, and solves the problem of expansion of the cylinder of the stand. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The cross section of the anti-collision telescopic hydraulic stand of the present application Figure 1 .

[0019] Figure 2 The cross section of the anti-collision telescopic hydraulic stand of the present application Figure 2 The arrow in the figure is the flow direction of the liquid.

[0020] Figure 3 The cross section of the anti-collision telescopic hydraulic stand of the present application Figure 3 .

[0021] Figure 4 The top view of the anti-collision telescopic hydraulic stand of the present application.

[0022] Figure 5 The front view of the anti-collision hydraulic support of the present application.

[0023] Figure 6 The side view of the anti-collision hydraulic support of the present application.

[0024] In the figure: the outer cylinder of the stand 100, the first limiting ring 110, the hinged block 120, the clamp groove 130, the middle cylinder of the stand 200, the first convex ring 210, the second limiting ring 220, the anti-collision piston 300, the inner cylinder of the stand 310, the second convex ring 311, the pressure relief valve 312, the liquid passage pipe 320, the piston block 330, the bottom of the inner cylinder of the stand 340, the liquid passage hole 341, the gas-liquid passage 350, the gas phase space 351, the liquid phase space 352. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] It is to be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end", and the like are used for description only and are not intended to be limiting.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] See Figures 1 to 4 The application provides a kind of anti-collision telescopic hydraulic column, including being arranged on the base of support, comprising: column middle cylinder 200 and anti-collision piston 300, one end of the column middle cylinder 200 is arranged on the base;The anti-collision piston 300 includes active column cylinder 310, liquid passage pipe 320, piston block 330 and active column cylinder bottom 340, the active column cylinder 310 is arranged in the column middle cylinder 200, and the active column cylinder 310 can slide up and down along the inner wall of the column middle cylinder 200;The liquid passage pipe 320 is arranged in the active column cylinder 310, one end of the liquid passage pipe 320 is connected one end of the active column cylinder 310;The active column cylinder bottom 340 is arranged at the other end of the liquid passage pipe 320, and is connected with the other end of the active column cylinder 310;Gas-liquid passage 350 is formed between the active column cylinder 310 and the liquid passage pipe 320, the piston block 330 is slidably arranged in the gas-liquid passage 350, and it is divided into gas phase space 351 and liquid phase space 352;The active column cylinder bottom 340 is provided with a plurality of liquid passage holes 341, and the liquid passage holes 341 communicate the column middle cylinder 200 with the liquid phase space 352, one end of the active column cylinder 310 away from the active column cylinder bottom 340 is provided with pressure relief valve 312, and the pressure relief valve 312 is communicated with the gas phase space 351.

[0029] Specifically, the middle column cylinder 200 is a common hydraulic column cylinder with one end open and the other end closed, the material of the movable cylinder 310 is the same as that of the middle column cylinder 200, the through liquid pipe 320 is arranged at the center of the movable cylinder 310, and the centers of the cross sections are the centers of the movable cylinder 310 and the through liquid pipe 320; the outer diameter of the through liquid pipe 320 is smaller than the inner diameter of the movable cylinder 310, the gas-liquid passage 350 is formed between the outer wall of the through liquid pipe 320 and the inner wall of the movable cylinder 310, the piston block 330 is slidingly arranged in the gas-liquid passage 350, the outer diameter of the piston block 330 is sealingly and slidingly matched with the inner wall of the movable cylinder 310, the inner diameter of the piston block 330 is sealingly and slidingly matched with the outer wall of the through liquid pipe 320, the gas-liquid passage 350 is divided into a gas phase space 351 and a liquid phase space 352 by the piston block 330, the liquid phase space 352 is between the piston block 330 and the movable cylinder bottom 340, and the gas phase space 351 is between the piston block 330 and the top of the movable cylinder 310; the movable cylinder bottom 340 is arranged at one end of the through liquid pipe 320, and a plurality of through liquid holes 341 are arranged on the movable cylinder bottom 340, so that the liquid can enter the liquid phase space 352 from the middle column cylinder 200 along the through liquid holes 341; similarly, the pressure relief valve 312 is arranged at the top of the movable cylinder 310, and the horizontal projection of the pressure relief valve 312 is located in the range of the gas phase space 351.

[0030] Further, after the rock burst, the pressure acting on the anti-rock telescopic hydraulic column is borne by the movable cylinder 310 first, the liquid in the middle column cylinder 200 enters the liquid phase space 352 through the plurality of through liquid holes 341 of the movable cylinder bottom 340 to drive the piston block 330 to move (the gas phase space 351 in the front part of the piston block 330 is pre-charged with high-pressure gas), the movable cylinder 310 is lowered and contracted to release the pressure, and after the pressure release, the pressure in the gas phase space 351 is released through the opening of the pressure relief valve 312.

[0031] The technical scheme of the anti-rock telescopic hydraulic column can achieve the following beneficial effects:

[0032] 1. The compression of the spring is used to open the liquid discharge hole, and the compression of the spring has a certain response time. When the hydraulic support is subjected to a large impact, the pressure in the lower cavity of the column changes in a time shorter than the response time of the spring, the safety valve cannot be opened in time, the impact energy cannot be released, and the column cylinder expansion phenomenon occurs.

[0033] 2. The gas is compressed by the sliding of the piston block 330, so that the movable cylinder 310 is lowered and contracted, the internal pressure is released through the pressure relief valve 312, the operation is more simple and convenient, the safety is higher, and the problem of column cylinder expansion is solved.

[0034] In one embodiment of the present application, in order to increase the support height, a column outer cylinder 100 is further included, one end of the column outer cylinder 100 is arranged on the base, the other end is sleeved outside the column middle cylinder 200, and the column middle cylinder 200 can slide up and down along the inner wall of the column outer cylinder 100.

[0035] The column outer cylinder 100 is vertically arranged, the lower end is detachably connected to the base, the column middle cylinder is arranged in the column outer cylinder 100, the column middle cylinder 200 slides up and down along the inner wall of the column outer cylinder 100 through liquid (liquid refers to hydraulic oil), and the specific structure is the same as that of the three telescopic columns, which is not repeated here; by arranging the column outer cylinder 100, the column middle cylinder and the movable column cylinder 310 can be telescopic, thereby achieving the purpose of increasing the support height.

[0036] Based on the above scheme, in order to solve the problem of cylinder separation, one end of the column outer cylinder 100 is provided with a first limiting ring 110, one end of the column middle cylinder 200 is provided with a first convex ring 210, and the first convex ring 210 is limited and matched with the first limiting ring 110.

[0037] Similarly, the column outer cylinder 100 is vertically arranged, the inner wall of the upper end of the column outer cylinder 100 is provided with a first limiting ring 110, the inner wall of the first limiting ring 110 is sealingly and slidingly matched with the outer wall of the column middle cylinder 200; the outer wall of the bottom of the column middle cylinder 200 is provided with a first convex ring 210, the outer wall of the first convex ring 210 is sealingly and slidingly matched with the inner wall of the column outer cylinder 100; when the column middle cylinder slides upward, the liquid drives the column middle cylinder to slide upward, and stops until the first convex ring 210 contacts the first limiting ring 110, through the limiting cooperation of the first convex ring 210 and the first limiting ring 110, the problem of cylinder separation caused by misoperation is solved, thereby improving the safety during support.

[0038] Based on the above scheme, in order to improve safety, one end of the column middle cylinder 200 away from the first convex ring 210 is provided with a second limiting ring 220, one end of the movable column cylinder bottom 340 is provided with a second convex ring 311, and the second convex ring 311 is limited and matched with the second limiting ring 220.

[0039] The vertical column middle cylinder 200 is vertically arranged, the second limiting ring 220 is arranged on the inner wall of the upper end of the vertical column middle cylinder 200, and the inner wall of the second limiting ring 220 is sealed and slidingly matched with the outer wall of the movable column cylinder 310. The second convex ring 311 is arranged on the outer wall of the movable column cylinder bottom 340, and the outer wall of the second convex ring 311 is sealed and slidingly matched with the inner wall of the vertical column middle cylinder 200. When the movable column cylinder 310 slides upward from bottom to top, the movable column cylinder bottom 340 slides upward under the driving of the liquid. When the movable column cylinder 310 slides to the maximum range, the top of the second convex block is in contact with the bottom of the second limiting ring 220, thereby playing a limiting role, solving the problem that the movable column cylinder 310 is separated from the vertical column middle cylinder 200 after exceeding the limit stroke, and further improving the safety of the support.

[0040] In the above scheme, in order to improve stability, a clamping groove 130 is arranged on the outer wall of the vertical column outer cylinder 100, and the clamping groove 130 is used for detachably connecting the vertical column outer cylinder 100 and the base.

[0041] The vertical column outer cylinder 100 is vertically arranged, and the clamping groove 130 is arranged on the outer wall of the upper part of the vertical column outer cylinder 100. The clamping groove 130 is connected with the base or the adjacent vertical column outer cylinder 100 through a clamping bracket or the like, so as to improve the stability and solve the problem that the lateral force is too large to cause the vertical column outer cylinder 100, the vertical column inner cylinder and the movable column cylinder 310 to tilt left and right, thereby improving the safety of the support.

[0042] Further, one end of the vertical column outer cylinder 100 is provided with a hinge block 120, and the hinge block 120 is detachably connected with the base. The hinge block 120 is a spherical seat.

[0043] The vertical column outer cylinder 100 is vertically arranged, and the bottom thereof is preferably a spherical seat. The spherical seat is detachably fixed on the base through a bolt, a bolt or the like, and the base is further reinforced through a clamp or the like, so that the connection is more simple and convenient, and stable.

[0044] Please refer to Figures 5 to 6 , a hydraulic support is provided, which comprises the anti-collision telescopic hydraulic column according to any one of the above.

[0045] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent application scope. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An anti-impact telescopic hydraulic column, mounted on the base of a bracket, characterized in that, include: A column cylinder, one end of which is mounted on the base; as well as An anti-impact piston includes a piston cylinder, a liquid-conducting pipe, a piston block, and a piston cylinder bottom. The piston cylinder is disposed inside the inner cylinder of the column and can slide up and down along the inner wall of the inner cylinder. The liquid-conducting pipe is disposed inside the piston cylinder, with one end connected to one end of the piston cylinder. The piston cylinder bottom is disposed at the other end of the liquid-conducting pipe and connected to the other end of the piston cylinder. A gas-liquid channel is formed between the piston cylinder and the liquid-conducting pipe. The piston block is slidably disposed within the gas-liquid channel, dividing it into a gas phase space and a liquid phase space. The piston cylinder bottom is provided with several liquid-conducting holes, which connect the inner cylinder of the column and the liquid phase space. A pressure relief valve is provided at the end of the piston cylinder away from the piston cylinder bottom, and the pressure relief valve is connected to the gas phase space.

2. The anti-impact telescopic hydraulic column according to claim 1, characterized in that, It also includes an outer cylinder for the column, one end of which is disposed on the base and the other end is sleeved on the outside of the middle cylinder for the column, and the middle cylinder for the column can slide up and down along the inner wall of the outer cylinder for the column.

3. The anti-impact telescopic hydraulic column according to claim 2, characterized in that, One end of the outer cylinder of the column is provided with a first limiting ring, and one end of the middle cylinder of the column is provided with a first convex ring, the first convex ring and the first limiting ring being in a limiting fit.

4. The anti-impact telescopic hydraulic column according to claim 3, characterized in that, A second limiting ring is provided at the end of the column cylinder away from the first convex ring, and a second convex ring is provided at the bottom end of the piston cylinder. The second convex ring and the second limiting ring are in a limiting cooperation.

5. The anti-impact telescopic hydraulic column according to claim 3, characterized in that, The outer wall of the column outer cylinder is provided with a clamp groove, which is used to detachably connect the column outer cylinder to the base.

6. The anti-impact telescopic hydraulic column according to claim 3, characterized in that, A hinge block is provided at one end of the outer cylinder of the column, and the hinge block is detachably connected to the base.

7. The anti-impact telescopic hydraulic column according to claim 6, characterized in that, The hinge block is a spherical seat.

8. An anti-impact hydraulic support, characterized in that, Including the anti-impact telescopic hydraulic column as described in any one of claims 1-7.

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