Special-shaped double-telescopic hydraulic support stand column

Abstract

The utility model relates to the technical field of hydraulic support stand columns, and provides a special-shaped double-telescopic hydraulic support stand column which comprises a first cylinder body, a second cylinder body and a piston rod, the piston rod is arranged in the second cylinder body, the second cylinder body is arranged in the first cylinder body, and a fixing section is arranged in the middle of the piston rod. According to the utility model, the fixed section is additionally arranged at the piston rod, and the sealing section of the piston rod of the upright post is shortened, so that the stroke of the hydraulic support upright post is reduced, and the processing, mounting and maintenance difficulty of the double-telescopic hydraulic support upright post under special conditions is reduced under the condition of ensuring the structural strength and processing requirements of the hydraulic support upright post; meanwhile, the machining cost of the hydraulic support stand column is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support column technology, and in particular to a special type of double telescopic hydraulic support column. Background Technology

[0002] Hydraulic supports are hydraulic power devices that use liquid pressure to generate supporting force and achieve automatic relocation for roof support and management. They are an indispensable supporting equipment for fully mechanized coal mining.

[0003] During the machining process of the central cylinder and piston of the double telescopic column of the hydraulic support, both the inner and outer diameters must simultaneously meet the high-precision coaxiality requirements. In some hydraulic support designs, due to limitations in column stroke and support height, the designed hydraulic support column sealing section is too long, which is detrimental to the installation, maintenance, and sealing effect of the support column. Moreover, it increases the machining difficulty of the hydraulic support column, wastes raw materials, and increases production costs. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the existing technology, due to the limitations of the column stroke and the support height, the sealing section of the hydraulic support column is too long, which is not conducive to the installation, maintenance and sealing effect of the support column, and will increase the processing difficulty of the hydraulic support column, waste raw materials and increase production costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a special type of double telescopic hydraulic support column, comprising a first cylinder body, a second cylinder body, and a piston rod, wherein the piston rod is disposed in the second cylinder body, the second cylinder body is disposed in the first cylinder body, and a fixed section is provided in the middle of the piston rod.

[0006] In a preferred embodiment, a first cylinder guide sleeve is fixedly connected to the cylinder port portion of the first cylinder body, and the first cylinder body is slidably connected inside the first cylinder guide sleeve. A second cylinder guide sleeve is fixedly connected to the cylinder port portion of the second cylinder body, and the second cylinder body is slidably connected inside the second cylinder guide sleeve.

[0007] In a preferred embodiment, a first cylinder body internal seal is fitted on the outside of the first cylinder guide sleeve, and the first cylinder body internal seal is correspondingly disposed at the cylinder port of the first cylinder body. A second cylinder body external seal is fixedly connected to the inside of the first cylinder guide sleeve, and the second cylinder body external seal is correspondingly disposed on the inside of the first cylinder guide sleeve.

[0008] In a preferred embodiment, a liquid passage pipe is provided on the outer side of the first cylinder body. The output end of the liquid passage pipe is installed at the bottom of the first cylinder body, and a connector seat is fixedly connected to the input end of the liquid passage pipe. A protective cover is fixedly connected to the outer side of the first cylinder body and surrounds the liquid passage pipe to protect the liquid passage pipe.

[0009] In a preferred embodiment, a second cylinder body inner seal is fitted on the outer side of the second cylinder guide sleeve, and a second cylinder body port seal is correspondingly disposed at the port of the second cylinder body to improve sealing connection.

[0010] In a preferred embodiment, a piston rod seal is fixedly connected to the inner side of the second cylinder guide sleeve.

[0011] In a preferred embodiment, a bottom seal is embedded in the bottom of the second cylinder body, and the bottom seal is correspondingly positioned at the bottom mounting point of the second cylinder body.

[0012] In a preferred embodiment, a piston bottom seal is fixedly connected to the bottom of the piston rod, and the piston bottom seal is configured to correspond to the bottom mounting position of the piston rod.

[0013] In a preferred embodiment, the piston rod head is fixedly connected to a threaded joint, and a threaded joint seal is sleeved on the outside of the threaded joint, with the threaded joint seal corresponding to the installation position of the threaded joint.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] This invention adds a fixed section to the piston rod and shortens the sealing section of the piston rod, thereby reducing the stroke of the hydraulic support column. While ensuring the structural strength and processing requirements of the hydraulic support column, it reduces the processing, installation, and maintenance difficulty of the double telescopic hydraulic support column under special circumstances, and effectively reduces the processing cost of the hydraulic support column. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a special type of double telescopic hydraulic support column provided for this utility model;

[0017] Figure 2 A partial cross-sectional view of a special type of double telescopic hydraulic support column provided by this utility model;

[0018] Figure 3 This utility model provides a special type of double telescopic hydraulic support column. Figure 2 Enlarged view of a portion of point A in the middle.

[0019] Legend:

[0020] 1. First cylinder body; 101. First cylinder body guide sleeve; 102. First cylinder body internal seal; 103. Second cylinder body external seal; 104. Connector seat; 105. Fluid inlet pipe; 106. Protective pipe cover; 2. Second cylinder body; 201. Second cylinder body guide sleeve; 202. Second cylinder body internal seal; 203. Piston rod seal; 204. Second cylinder body bottom seal; 3. Piston rod; 301. Fixed section; 302. Piston rod bottom seal; 303. Threaded connector; 304. Threaded connector seal. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 This utility model provides a technical solution: a special type of double telescopic hydraulic support column, including a first cylinder 1, a second cylinder 2, and a piston rod 3. The piston rod 3 is disposed inside the second cylinder 2, and the second cylinder 2 is disposed inside the first cylinder 1. The piston rod 3 has a fixed section 301 in the middle. The addition of the fixed section 301 to the piston rod 3 shortens the sealing section of the column piston rod, thereby reducing the stroke of the hydraulic support column. While ensuring the structural strength and processing requirements of the hydraulic support column, it reduces the processing, installation, and maintenance difficulty of the double telescopic hydraulic support column under special circumstances, and effectively reduces the processing cost of the hydraulic support column.

[0023] like Figure 1-3 As shown, a first cylinder guide sleeve 101 is fixedly connected inside the cylinder port of the first cylinder 1, and the first cylinder 1 is slidably connected inside the first cylinder guide sleeve 101. A second cylinder guide sleeve 201 is fixedly connected inside the cylinder port of the second cylinder 2, and the second cylinder 2 is slidably connected inside the second cylinder guide sleeve 201. By setting the first cylinder guide sleeve 101 and the second cylinder guide sleeve 201, the movement of the second cylinder 2 and the piston rod 3 is guided, making the linear movement of the second cylinder 2 and the piston rod 3 more stable.

[0024] like Figure 1-3As shown, a first cylinder body internal seal 102 is sleeved on the outside of the first cylinder body guide sleeve 101. The first cylinder body internal seal 102 is correspondingly disposed at the cylinder opening of the first cylinder body 1. A second cylinder body external seal 103 is fixedly connected to the inside of the first cylinder body guide sleeve 101. The second cylinder body external seal 103 is correspondingly disposed on the inside of the first cylinder body guide sleeve 101. By setting the first cylinder body internal seal 102 and the second cylinder body external seal 103, the sealing performance between the first cylinder body 1 and the second cylinder body 2 of the device is improved, and dynamic sealing of the first cylinder body 1, the second cylinder body 2 and the piston rod is achieved.

[0025] like Figure 1-3 As shown, a fluid passage pipe 105 is provided on the outer side of the first cylinder body 1. The output end of the fluid passage pipe 105 is installed at the bottom of the first cylinder body 1. A connector seat 104 is fixedly connected to the input end of the fluid passage pipe 105. A protective cover 106 is fixedly connected to the outer side of the first cylinder body 1 and is arranged around the outer periphery of the fluid passage pipe 105. The protective cover 106 can protect the fluid passage pipe 105. The connector seat 104 is used to connect an external input device. The fluid passage pipe 105 can add hydraulic fluid into the first cylinder 1.

[0026] like Figure 1-3 As shown, the second cylinder guide sleeve 201 is fitted with a second cylinder internal seal 202 on its outer side. The second cylinder internal seal 202 is correspondingly disposed at the cylinder port of the second cylinder 2 to improve the connection sealing between the first cylinder 1 and the second cylinder 2.

[0027] like Figure 1-3 As shown, a piston rod seal 203 is fixedly connected to the inner side of the second cylinder guide sleeve 201 to improve the connection sealing of the piston rod 3.

[0028] like Figure 1-3 As shown, a second cylinder bottom seal 204 is embedded at the bottom of the second cylinder body 2. The second cylinder bottom seal 204 is correspondingly set at the bottom mounting position of the second cylinder body 2 to improve the bottom sealing performance of the device and prevent bottom sealing gaps.

[0029] like Figure 1-3 As shown, a piston rod bottom seal 302 is fixedly connected to the bottom of the piston rod 3. The piston rod bottom seal 302 is set to correspond to the bottom installation position of the piston rod 3, which is used to improve the sealing stability between the piston rod 3 and the second cylinder 2.

[0030] like Figure 1-3As shown, a threaded connector 303 is fixedly connected to the head of the piston rod 3. A threaded connector seal 304 is sleeved on the outside of the threaded connector 303. The threaded connector seal 304 is installed in a position corresponding to that of the threaded connector 303. The threaded connector 303 is convenient to be connected to external devices, and the threaded connector seal 304 can prevent sealing leaks from the threaded connector 303.

[0031] Working principle: The external inlet hose is connected to the connector seat 104. When the piston rod 3 extends, the emulsion enters the first cylinder 1 of the column through the connector seat 104 and the liquid inlet pipe 105, thereby pushing out the second cylinder 2. When the bottom fixed section 301 of the second cylinder 2 contacts the guide sleeve 101 of the first cylinder, the second cylinder 2 is fully extended. At this time, the liquid continues to flow, and the bottom valve of the second cylinder 2 opens, allowing the emulsion to enter the second cylinder 2, thereby pushing out the piston rod 3. The addition of the fixed section 301 at the piston rod 3 shortens the sealing section of the column piston rod, thereby reducing the stroke of the hydraulic support column. While ensuring the structural strength and processing requirements of the hydraulic support column, it reduces the processing, installation, and maintenance difficulty of the double telescopic hydraulic support column under special circumstances, and effectively reduces the processing cost of the hydraulic support column.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A special type of double telescopic hydraulic support column, characterized in that, It includes a first cylinder (1), a second cylinder (2) and a piston rod (3), wherein the piston rod (3) is disposed in the second cylinder (2) and the second cylinder (2) is disposed in the first cylinder (1), and a fixed section (301) is provided in the middle of the piston rod (3).

2. The special type double telescopic hydraulic support column according to claim 1, characterized in that, A first cylinder guide sleeve (101) is fixedly connected to the cylinder port of the first cylinder (1), and the first cylinder (1) is slidably connected inside the first cylinder guide sleeve (101). A second cylinder guide sleeve (201) is fixedly connected to the cylinder port of the second cylinder (2), and the second cylinder (2) is slidably connected inside the second cylinder guide sleeve (201).

3. The special type double telescopic hydraulic support column according to claim 2, characterized in that, A first cylinder body internal seal (102) is provided on the outside of the first cylinder body guide sleeve (101). The first cylinder body internal seal (102) is correspondingly provided at the cylinder port of the first cylinder body (1). A second cylinder body external seal (103) is fixedly connected to the inside of the first cylinder body guide sleeve (101). The second cylinder body external seal (103) is correspondingly provided on the inside of the first cylinder body guide sleeve (101).

4. The special type double telescopic hydraulic support column according to claim 1, characterized in that, A liquid-passing pipe (105) is provided on the outside of the first cylinder body (1). The output end of the liquid-passing pipe (105) is installed at the bottom of the first cylinder body (1). A connector seat (104) is fixedly connected to the input end of the liquid-passing pipe (105). A protective cover (106) is fixedly connected to the outside of the first cylinder body (1) around the outer periphery of the liquid-passing pipe (105).

5. The special type double telescopic hydraulic support column according to claim 2, characterized in that, The second cylinder guide sleeve (201) is fitted with a second cylinder internal seal (202) on its outer side, and the second cylinder internal seal (202) is correspondingly disposed at the cylinder port of the second cylinder (2).

6. The special type double telescopic hydraulic support column according to claim 5, characterized in that, A piston rod seal (203) is fixedly connected to the inner side of the second cylinder guide sleeve (201).

7. The special type double telescopic hydraulic support column according to claim 1, characterized in that, The bottom of the second cylinder (2) is fitted with a bottom seal (204), and the bottom seal (204) is positioned corresponding to the bottom mounting point of the second cylinder (2).

8. The special type double telescopic hydraulic support column according to claim 1, characterized in that, The piston rod (3) is fixedly connected to a piston rod bottom seal (302), and the piston rod bottom seal (302) is set to correspond to the bottom installation position of the piston rod (3).

9. The special type double telescopic hydraulic support column according to claim 1, characterized in that, The piston rod (3) head is fixedly connected to a threaded joint (303), and a threaded joint seal (304) is sleeved on the outside of the threaded joint (303). The threaded joint seal (304) is set in a position corresponding to the installation position of the threaded joint (303).

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