Fixing structure for stroke sensor of hydraulic support jack

Abstract

The utility model relates to a fixing structure for a stroke sensor of a hydraulic support jack, and belongs to the technical field of fully-mechanized coal mining support. The hydraulic support jack comprises a cylinder body, a piston rod, a cylinder bottom and a piston. An axial through hole and a radial through hole are formed in the cylinder bottom, the axial through hole is communicated with the radial through hole, one end of the inner side of the axial through hole is communicated with the interior of the cylinder body, one end of the inner side of the axial through hole is in threaded connection with a separation column, a cable socket is fixedly arranged on the outer side of the radial through hole, and a cable plug is fixedly arranged on the cable socket. A sensor rod body is fixedly arranged on the separation column, the sensor rod body is inserted into the piston rod in a sliding mode, the cable plug is connected with the sensor rod body through a cable, a magnetic ring is fixedly arranged at the bottom end of the piston rod, and the magnetic ring is connected to the outer side of the sensor rod body in a sliding and sleeving mode; the problems that a fixing structure of a stroke sensor of an existing hydraulic support jack is prone to being damaged and inconvenient to disassemble and assemble are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fully mechanized coal mining support, and particularly relates to a fixing structure for a stroke sensor of a hydraulic support jack. Background Technique

[0002] China is rich in coal reserves and is a major coal-producing country. In fully mechanized coal mining equipment, hydraulic supports are the support equipment for fully mechanized mining faces. Its main function is to support the roof, maintain a safe working space, and push the mining and transportation equipment in the working face, playing a crucial role in coal mine safety operations. The mining jack in the hydraulic support is the power element of the hydraulic support. It uses the high-pressure liquid provided by the pump station to complete each action of the support through different positions and connection methods, providing the required power for the lifting, pushing the scraper conveyor, and pulling the support of the support.

[0003] In recent years, with the continuous progress of fully mechanized mining technology, the equipment in fully mechanized mining faces has basically achieved intelligent control. The stroke sensor is one of the important sensors for the intelligent control of hydraulic supports. Its main function is to accurately display the extension and retraction strokes of the jack, which can better help mine workers master the working state of the jack. The installation of the stroke sensor plays a crucial role in its use. A reasonable fixing method for the jack stroke sensor can reduce the production cycle during design, damage to components during underground work, improve the safety and coal mining efficiency of hydraulic supports, increase production capacity, and facilitate replacement in case of damage. However, the existing fixing structure for the stroke sensor of the hydraulic support jack cannot meet the above requirements. Summary of the Utility Model

[0004] The utility model overcomes the deficiencies of the prior art and provides a fixing structure for a stroke sensor of a hydraulic support jack, solving the problems that the existing fixing structure for the stroke sensor of the hydraulic support jack is easily damaged and inconvenient to disassemble and assemble.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions.

[0006] A fixing structure for a stroke sensor of a hydraulic support jack. The hydraulic support jack includes a cylinder block, a piston rod is slidably arranged inside the cylinder block, a cylinder bottom is fixedly arranged at the bottom opening of the cylinder block, a piston is fixedly sleeved on the outer side surface of the bottom end of the piston rod, and the outer side surface of the piston is in sliding contact with the inner wall of the cylinder block; an axial through hole and a radial through hole are arranged on the cylinder bottom, the axial through hole is communicated with the radial through hole, the inner end of the axial through hole is communicated with the inside of the cylinder block, a partition column is screwed at the inner end of the axial through hole, a cable socket is fixedly arranged on the outer side of the radial through hole, a cable plug is fixedly arranged on the cable socket, a sensor rod body is fixedly arranged on the partition column, the sensor rod body is slidably inserted into the piston rod, the cable plug is connected with the sensor rod body through a cable, a magnetic ring is fixedly arranged at the bottom end of the piston rod, and the magnetic ring is slidably sleeved on the outer side of the sensor rod body.

[0007] Further, the axial through hole with both ends penetrating is arranged at the axis of the cylinder bottom, and a first protection column is screwed in the middle of the axial through hole.

[0008] Further, the radial through hole is arranged in the middle of the side wall of the axial through hole of the cylinder bottom, the radial through hole is arranged along the radial direction of the cylinder bottom, the radial through hole is located on the side of the first protection column close to the cylinder body of the axial through hole, the inner end of the radial through hole is communicated with the inside of the axial through hole, and the outer end of the radial through hole is communicated with the outside of the cylinder bottom.

[0009] Further, a cable socket is fixedly arranged at the outer end of the cylinder bottom, and the outer end of the radial through hole is communicated with the inside of the cable socket.

[0010] Further, an installation groove is arranged on the side wall of the cable socket close to the cylinder body, and the cable plug is fixedly arranged inside the installation groove; a threaded through hole penetrating inside and outside is arranged on the side wall of the cable socket far from the cylinder body, and a second protection column is screwed at the opening of the outer end of the threaded through hole.

[0011] Further, a large-diameter hole is arranged at the center of the end of the partition column far from the cylinder body, a small-diameter hole is arranged at the center of the end of the partition column close to the cylinder body, the large-diameter hole is communicated with the small-diameter hole, and the inner diameter of the large-diameter hole is larger than the inner diameter of the small-diameter hole.

[0012] Further, a limiting ring is fixedly arranged inside the opening of the end of the small-diameter hole far from the large-diameter hole, and the inner diameter of the limiting ring is smaller than the inner diameter of the small-diameter hole; a first fixing member is screwed inside the large-diameter hole, and the first fixing member is a cylindrical structure with both ends open, and the outer wall of the first fixing member is screwed with the inner wall of the large-diameter hole.

[0013] Further, a cylindrical fixing groove is provided at the center of one end of the piston rod close to the cylinder bottom. A socket hole is provided at the inner bottom surface of the fixing groove. The sensor rod body is slidably inserted into the insertion rod. A limiting column is fixedly provided at one end of the sensor rod body close to the cylinder bottom. The outer diameter of the limiting column is larger than the outer diameter of the sensor rod body. The limiting column is located inside the small-diameter hole of the partition column, and the outer diameter of the limiting column is larger than the inner diameter of the limiting ring.

[0014] Further, the cable is provided inside the radial through hole at the cylinder bottom. One end of the cable is connected to the cable plug, and the other end of the cable passes through the first fixing member and is connected to the sensor rod body.

[0015] Furthermore, the magnetic ring is provided inside the fixing groove. A second fixing member is screwed at the open end on the outer side of the fixing groove. The second fixing member is a cylindrical structure with both ends open, and the outer wall of the second fixing member is screwed to the inner wall of the fixing groove.

[0016] The beneficial effects of the present utility model compared with the prior art are as follows:

[0017] The fixing structure of the traditional stroke sensor has low reliability and cannot meet the relatively harsh underground environment, which may cause damage to the mine-used stroke sensor during underground use. Compared with the existing fixing structure of the stroke sensor, the fixing structure of a stroke sensor for a hydraulic support jack provided by the present utility model can improve the reliability of the stroke sensor, and the disassembly and assembly are simple, which can better adapt to the mine environment and improve the safety and production efficiency of underground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present utility model in detail with reference to the drawings:

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is the structural schematic diagram of the partition column;

[0021] Figure 3 is the three-dimensional schematic diagram of the first protection column;

[0022] Figure 4 is the three-dimensional schematic diagram of the second protection column;

[0023] Figure 5 is the three-dimensional schematic diagram of the first fixing member;

[0024] Figure 6 is the three-dimensional schematic diagram of the second fixing member;

[0025] Among them, 1 is the cylinder block, 2 is the piston rod, 3 is the cylinder bottom, 4 is the piston, 5 is the axial through hole, 6 is the first protection column, 7 is the radial through hole, 8 is the cable socket, 9 is the cable plug, 10 is the second protection column, 11 is the partition column, 12 is the large diameter hole, 13 is the small diameter hole, 14 is the limit ring, 15 is the first fixing member, 16 is the sensor rod body, 17 is the limit column, 18 is the cable, 19 is the magnetic ring, and 20 is the second fixing member. Detailed implementation mode

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail in combination with the embodiments and the drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. The technical solutions of the present utility model will be described in detail below in combination with the embodiments and the drawings, but the protection scope is not limited by this.

[0027] As Figure 1 As shown in Fig. -6, the present utility model provides a fixing structure for a stroke sensor of a hydraulic support jack. The hydraulic support jack includes a cylinder block 1, a piston rod 2 is slidably arranged inside the cylinder block 1, a cylinder bottom 3 is fixedly arranged at the bottom opening of the cylinder block 1, a piston 4 is fixedly sleeved on the outer side surface of the bottom end of the piston rod 2, and the outer side surface of the piston 4 is in sliding contact with the inner wall of the cylinder block 1.

[0028] An axially through hole 5 that penetrates through both ends is arranged at the axis of the cylinder bottom 3, and the inner end of the axially through hole 5 is communicated with the inside of the cylinder block 1. A first protection column 6 is screwed in the middle of the axially through hole 5. The first protection column 6 is of a cylindrical structure, and the outer side of the first protection column 6 is screwed with the inner wall of the middle of the axially through hole 5, so as to separate the inner end of the axially through hole 5 from the outer side of the cylinder bottom 3. Four M6 threaded holes are uniformly arranged along the circumference on the end surface of the first protection column 6 away from the cylinder block 1, which is convenient for the disassembly and assembly of the first protection column 6.

[0029] A radial through hole 7 is arranged in the middle of the side wall of the axially through hole 5 of the cylinder bottom 3. The radial through hole 7 is arranged along the radial direction of the cylinder bottom 3. The radial through hole 7 is located on the side of the first protection column 6 close to the cylinder block 1 of the axially through hole 5. The inner end of the radial through hole 7 is communicated with the inside of the axially through hole 5, and the outer end of the radial through hole 7 is communicated with the outside of the cylinder bottom 3.

[0030] On the outer end of the bottom of the cylinder 3, a cable socket 8 is fixedly arranged, and the outer end of the radial through-hole 7 is communicated with the inside of the cable socket 8. On the side wall of the cable socket 8 close to the cylinder body 1, an installation groove is arranged, and a cable plug 9 is fixedly arranged inside the installation groove. On the side wall of the cable socket 8 far from the cylinder body 1, a threaded through-hole penetrating inside and outside is arranged, and a second protection column 10 is screwed at the opening of the outer end of the threaded through-hole. The second protection column 10 is of a cylindrical structure, and the threaded through-hole is closed by the second protection column 10. A cross groove is arranged on the outer end face of the second protection column 10 to facilitate the disassembly and assembly of the second protection column 10.

[0031] A partition column 11 is screwed at the inner end of the axial through-hole 5. The partition column 11 is of a cylindrical structure, and the axial through-hole 5 is separated from the inside of the cylinder body 1 by the partition column 11. A large-diameter hole 12 is arranged at the center of the end of the partition column 11 far from the cylinder body 1, and a small-diameter hole 13 is arranged at the center of the end of the partition column 11 close to the cylinder body 1. The large-diameter hole 12 is communicated with the small-diameter hole 13, and the inner diameter of the large-diameter hole 12 is larger than the inner diameter of the small-diameter hole 13.

[0032] A limit ring 14 is fixedly arranged inside the opening of the end of the small-diameter hole 13 far from the large-diameter hole 12. The inner diameter of the limit ring 14 is smaller than the inner diameter of the small-diameter hole 13.

[0033] A first fixing member 15 is screwed inside the large-diameter hole 12. The first fixing member 15 is of a cylindrical structure with both ends open, and the outer wall of the first fixing member 15 is screwed with the inner wall of the large-diameter hole 12.

[0034] A cylindrical fixing groove is arranged at the center of the end of the piston rod 2 close to the bottom of the cylinder 3. An insertion hole is arranged at the inner bottom surface of the fixing groove, and the insertion hole is located on the axis of the piston rod 2. A sensor rod body 16 is slidably inserted inside the insertion rod. A limit column 17 is fixedly arranged at the end of the sensor rod body 16 close to the bottom of the cylinder 3. The outer diameter of the limit column 17 is larger than the outer diameter of the sensor rod body 16. The limit column 17 is located inside the small-diameter hole 13 of the partition column 11, and the outer diameter of the limit column 17 is larger than the inner diameter of the limit ring 14. The sensor rod body 16 is prevented from coming out by the limit ring 14, and thus the sensor rod body 16 is fixed on the partition column 11 by the first fixing member 15. A hexagonal platform is fixedly arranged at the end of the first fixing member 15 far from the cylinder body 1 to facilitate the disassembly and assembly of the first fixing member 15 and the sensor rod body 16.

[0035] A cable 18 is arranged inside the radial through-hole 7 of the bottom of the cylinder 3. One end of the cable 18 is connected to the cable plug 9, and the other end of the cable 18 passes through the first fixing member 15 and is connected to the sensor rod body 16.

[0036] Inside the fixing groove, there is a magnetic ring 19 sleeved on the outside of the sensor rod body 16. At the open end on the outside of the fixing groove, a second fixing member 20 is screwed. The second fixing member 20 is a cylindrical structure with both ends open, and the outer wall of the second fixing member 20 is screwed to the inner wall of the fixing groove. On the end face of the second fixing member 20 close to the cylinder bottom 3, four M6 threaded holes are evenly arranged along the circumference, which is convenient for disassembling and assembling the second fixing member 20 and the magnetic ring 19.

[0037] The fixing method of a fixing structure of a stroke sensor for a hydraulic support jack provided by the present utility model is as follows:

[0038] In the first step, first, the specification stroke of the stroke sensor needs to be selected according to the actual use requirements, and then the structural forms of the cylinder bottom 3 and the piston rod 2 of the hydraulic support jack are designed according to the shape of the sensor.

[0039] In the second step, the magnetic ring 19 is placed inside the fixing groove at the bottom end of the piston rod 2, and the magnetic ring 19 is fixed by screwing the second fixing ring into the fixing groove.

[0040] In the third step, after the piston rod 2 and the cylinder body 1 are assembled, the sensor rod body 16 passes through the second fixing member 20 and the magnetic ring 19 and then extends into the insertion hole of the piston rod 2, so that the limit post 17 at the end of the sensor rod body 16 is located inside the small-diameter hole 13 of the partition post 11; then the first fixing member 15 is screwed into the large-diameter hole 12 of the partition post 11, thereby fixing the sensor rod body 16 to the partition post 11.

[0041] In the fourth step, the cable plug 9 of the stroke sensor is installed at the cable socket 8, and the cable plug 9 is connected to the sensor rod body 16 through the cable 18.

[0042] In the fifth step, the first protection post 6 is screwed into the middle of the axial through hole 5, and the second protection post 10 is screwed into the threaded through hole of the cable socket 8 to prevent the harsh underground environment from damaging the stroke sensor through the first protection post 6 and the second protection post 10.

[0043] When the hydraulic support jack is working, the piston rod 2 slides inside the cylinder body 1, and the piston rod 2 drives the magnetic ring 19 to slide synchronously, so that the magnetic ring 19 slides relative to the outside of the sensor rod body 16, and thus the stroke sensor can detect the stroke of the piston rod 2.

[0044] 1 is the outer cylinder body, 2 is the cylinder bottom, 3 is the piston rod, 4 is the piston, 5 is the first fixing device, 6 is the second fixing device, 7 is the first protection device, 8 is the second protection device, 9 is the magnetic ring, 10 is the sensor rod body, 11 is the cable plug, 12 is the cable, 13 is the cable socket.

[0045] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A fixing structure for a stroke sensor of a hydraulic support jack, characterized in that: The hydraulic support jack includes a cylinder body (1), inside which a piston rod (2) is slidably arranged. At the bottom opening of the cylinder body (1), a cylinder bottom (3) is fixedly arranged. On the outer side surface of the bottom end of the piston rod (2), a piston (4) is fixedly sleeved. The outer side surface of the piston (4) is in sliding contact with the inner wall of the cylinder body (1). On the cylinder bottom (3), an axial through hole (5) and a radial through hole (7) are provided. The axial through hole (5) is communicated with the radial through hole (7). The inner end of the axial through hole (5) is communicated with the inside of the cylinder body (1). A separating column (11) is screwed at the inner end of the axial through hole (5). On the outer side of the radial through hole (7), a cable socket (8) is fixedly arranged. A cable plug (9) is fixedly arranged on the cable socket (8). On the separating column (11), a sensor rod body (16) is fixedly arranged. The sensor rod body (16) is slidably inserted into the piston rod (2). The cable plug (9) is connected with the sensor rod body (16) through a cable (18). At the bottom end of the piston rod (2), a magnetic ring (19) is fixedly arranged. The magnetic ring (19) is slidably sleeved on the outer side of the sensor rod body (16).

2. The fixing structure of a stroke sensor for a hydraulic support jack according to claim 1, characterized in that: At the axis of the cylinder bottom (3), the axial through hole (5) with both ends penetrating is provided, and a first protection column (6) is screwed in the middle of the axial through hole (5).

3. The fixed structure of a stroke sensor for a hydraulic support jack according to claim 2, characterized in that: On the middle part of the side wall of the axial through hole (5) of the cylinder bottom (3), the radial through hole (7) is provided. The radial through hole (7) is arranged along the radial direction of the cylinder bottom (3). The radial through hole (7) is located on the side of the first protection column (6) close to the cylinder body (1) of the axial through hole (5). The inner end of the radial through hole (7) is communicated with the inside of the axial through hole (5), and the outer end of the radial through hole (7) is communicated with the outside of the cylinder bottom (3).

4. The fixed structure of a stroke sensor for a hydraulic support jack according to claim 3, characterized in that: On the outer end of the cylinder bottom (3), a cable socket (8) is fixedly arranged. The outer end of the radial through hole (7) is communicated with the inside of the cable socket (8).

5. The fixed structure of a stroke sensor for a hydraulic support jack according to claim 4, characterized in that: On the side wall of the cable socket (8) close to the cylinder body (1), an installation groove is provided, and the cable plug (9) is fixedly arranged inside the installation groove. On the side wall of the cable socket (8) far from the cylinder body (1), a threaded through hole penetrating inside and outside is provided, and a second protection column (10) is screwed at the opening of the outer end of the threaded through hole.

6. The fixed structure of a stroke sensor for a hydraulic support jack according to claim 1, characterized in that: At the center of the end of the separating column (11) far from the cylinder body (1), a large-diameter hole (12) is provided. At the center of the end of the separating column (11) close to the cylinder body (1), a small-diameter hole (13) is provided. The large-diameter hole (12) is communicated with the small-diameter hole (13), and the inner diameter of the large-diameter hole (12) is larger than that of the small-diameter hole (13).

7. The fixed structure of a stroke sensor for a hydraulic support jack according to claim 6, characterized in that: At the inner opening of the end of the small-diameter hole (13) far from the large-diameter hole (12), a limiting ring (14) is fixedly arranged. The inner diameter of the limiting ring (14) is smaller than that of the small-diameter hole (13). A first fixing member (15) is screwed inside the large-diameter hole (12). The first fixing member (15) is a cylindrical structure with both ends open, and the outer wall of the first fixing member (15) is screwed with the inner wall of the large-diameter hole (12).

8. The fixing structure of a stroke sensor for a hydraulic support jack according to claim 7, characterized in that: A cylindrical fixing groove is provided at the center of one end of the piston rod (2) close to the cylinder bottom (3). A plugging hole is provided at the inner bottom surface of the fixing groove. The sensor rod body (16) is slidably plugged inside the plugging rod. A limiting column (17) is fixedly provided at one end of the sensor rod body (16) close to the cylinder bottom (3). The outer diameter of the limiting column (17) is larger than the outer diameter of the sensor rod body (16); the limiting column (17) is located inside the small-diameter hole (13) of the separating column (11), and the outer diameter of the limiting column (17) is larger than the inner diameter of the limiting ring (14).

9. The fixed structure of a stroke sensor for a hydraulic support jack according to claim 8, characterized in that: The cable line (18) is provided inside the radial through hole (7) of the cylinder bottom (3). One end of the cable line (18) is connected to the cable plug (9), and the other end of the cable line (18) passes through the first fixing member (15) and then is connected to the sensor rod body (16).

10. The fixing structure of a stroke sensor for a hydraulic support jack according to claim 9, characterized in that: The magnetic ring (19) is provided inside the fixing groove. A second fixing member (20) is screwed at the opening at the outer end of the fixing groove. The second fixing member (20) is a cylindrical structure with both ends open, and the outer wall of the second fixing member (20) is screwed with the inner wall of the fixing groove.

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