Underground coal mine temporary supporting device

Abstract

The utility model discloses an underground coal mine temporary support device, which relates to the technical field of temporary support and comprises a support base, a plurality of hydraulic cylinders are fixedly connected to the top surface of the support base, a support top plate is arranged in the center of the top of the support base, and a plurality of lifting components are slidably connected to two sides in the support base simultaneously. The supporting top plate is fixedly connected with a lifting assembly, the two sides of the top face of the lifting assembly are each fixedly connected with a plurality of bottom connecting bases, one side of the outer wall of each hydraulic air cylinder is fixedly connected with a top connecting base, and one side of the outer wall of each hydraulic air cylinder is rotationally connected with a telescopic air cylinder. The Y-axis anti-skid teeth and the X-axis anti-skid teeth are embedded into the shallow layer of the earth surface to form multidirectional occlusion, so that manual knocking operation is not needed in the process, physical output during installation of the ground cone is eliminated, interference of high-frequency vibration caused by frequent knocking on a rock mass can be effectively reduced, and collapse risks caused by knocking are avoided as much as possible.

Description

Technical Field

[0001] This utility model relates to the field of temporary support technology, specifically a temporary support device for underground coal mines. Background Technology

[0002] Coal mines are industrial sites where humans obtain coal resources through open-pit or underground mining. As an important fossil energy base, coal mines use mechanized and manual mining methods to transform coal from deep underground strata into industrial raw materials. Their products are widely used in power generation, metallurgy, and chemical industries. In recent years, with the transition to clean energy, intelligent mining and ecological restoration technologies are gradually improving the safety and environmental protection levels of coal mines.

[0003] According to a search, Chinese patent document, publication number CN 222457472 U, discloses a temporary support device for coal mine tunneling, specifically relating to the field of coal mine excavation support technology. It includes two arched support frames, each with support rods on both sides of its bottom. The bottom of each arched support frame has a disassembly mechanism for easy removal from the support rods. The disassembly mechanism includes two limiting rods at the bottom of the arched support frame, each with a first threaded hole. The top of each support rod has a second threaded hole, and the connected first and second threaded holes are internally threaded with the same first bolt. This invention allows the arched support frame and support rods to be separated into two smaller parts through the disassembly mechanism. The overall size is small, it occupies little space, and it is easy to move within the coal mine. Furthermore, the support mechanism allows for adjustment of the distance between the two arched support frames.

[0004] Although this support device achieves stable fixation in the mine through ground cones, during installation, the ground cones need to be repeatedly hammered into the rock mass with manpower and tools. The requirements for precise control of angle and depth are high, and the narrow working environment is more likely to aggravate physical consumption and prolong preparation time. At the same time, the high-frequency vibration caused by frequent hammering may cause the surrounding rock mass to loosen, resulting in the risk of collapse. In view of this, we provide a temporary support device for underground coal mines. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a temporary support device for underground coal mines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a temporary support device for underground coal mines, comprising a support base, a plurality of hydraulic cylinders fixedly connected to the top surface of the support base, and a support top plate provided at the center of the top of the support base; a plurality of lifting components slidably connected to both sides of the interior of the support base, and a plurality of bottom connecting seats fixedly connected to both sides of the top surface of the lifting components; a top connecting seat fixedly connected to one side of the outer wall of each of the plurality of hydraulic cylinders, and a telescopic cylinder rotatably connected to one side of the outer wall of each of the plurality of hydraulic cylinders; limit guide rails fixedly connected to both sides of the inner wall of the support base; a plurality of limit components fixedly connected to both sides of the outer wall of the lifting components; and a plurality of drive rollers rotatably connected inside the lifting components, with anti-slip tracks sleeved on the outer walls of the plurality of drive rollers.

[0007] As mentioned above, the outer walls of the telescopic ends of the multiple hydraulic cylinders are fixedly connected to the bottom surface of the support top plate, and the multiple hydraulic cylinders are distributed in a rectangular array at the four corners of the top surface of the support base.

[0008] As described above, the outer wall of the limiting guide rail is slidably connected to the inner center of the limiting component, and the outer wall of the limiting guide rail is tightly fitted to the inner wall of the limiting component.

[0009] As described above, the inner center of the top connecting seat is rotatably connected to the outer wall of one end of the telescopic cylinder via a rotating shaft, and the outer wall of the telescopic end of the telescopic cylinder is rotatably connected to the bottom connecting seat via a rotating shaft.

[0010] The aforementioned anti-slip tracks are located on both sides of the bottom of the support top plate.

[0011] As mentioned above, the support base has Y-axis anti-slip teeth at the center of its bottom surface.

[0012] As mentioned above, multiple X-axis anti-slip teeth are provided on both sides of the bottom surface of the support base, and the bottom surfaces of the Y-axis anti-slip teeth and the X-axis anti-slip teeth are all provided with a 45-degree bevel.

[0013] Compared with existing technologies, this temporary support device for underground coal mines has the following advantages:

[0014] I. This utility model utilizes multiple anti-slip tracks to move the device to a designated position. Then, by retracting and extending the telescopic cylinder, the support base is lowered, and the Y-axis and X-axis anti-slip teeth at its bottom immediately fit tightly against the bottom of the mine. Subsequently, multiple hydraulic cylinders are activated to push the support roof plate up to the top wall of the mine. At the same time, the supporting force generated by the hydraulic cylinders is transmitted through the support base to the Y-axis and X-axis anti-slip teeth. This allows the support roof plate to support the top wall of the mine while the Y-axis and X-axis anti-slip teeth embed into the shallow surface layer to form a multi-directional engagement. This eliminates the need for manual hammering during the process, thus eliminating the physical exertion required for the installation of ground cones and effectively reducing the interference of high-frequency vibrations caused by frequent hammering on the rock mass, thereby minimizing the risk of collapse caused by hammering.

[0015] II. After completing the temporary support of the current working surface, the operator can use the hydraulic cylinder to retract the support top plate while extending the telescopic end of the telescopic cylinder outward to move the anti-slip track down, lift the support base, and remove the device from the ground surface, allowing technicians to move the device to the next support surface.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a partial three-dimensional structural diagram of the lifting component of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the bottom surface of the support base of this utility model.

[0021] In the diagram: 1. Support base; 101. Y-axis anti-slip teeth; 102. X-axis anti-slip teeth; 2. Hydraulic cylinder; 201. Support top plate; 3. Lifting assembly; 301. Bottom connecting seat; 302. Top connecting seat; 303. Telescopic cylinder; 304. Limit guide rail; 305. Limit assembly; 306. Drive roller; 307. Anti-slip track. Detailed Implementation

[0022] 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.

[0023] like Figure 1-4As shown, this utility model provides a technical solution: a temporary support device for underground coal mines, including a support base 1, a plurality of hydraulic cylinders 2 fixedly connected to the top surface of the support base 1, and a support top plate 201 provided at the center of the top of the support base 1, a plurality of lifting components 3 slidably connected to both sides inside the support base 1, and a plurality of bottom connecting seats 301 fixedly connected to both sides of the top surface of the lifting components 3, a top connecting seat 302 fixedly connected to one side of the outer wall of the plurality of hydraulic cylinders 2, and a telescopic cylinder 303 rotatably connected to one side of the outer wall of the plurality of hydraulic cylinders 2, a limit guide rail 304 fixedly connected to both sides of the inner wall of the support base 1, a plurality of limit components 305 fixedly connected to both sides of the outer wall of the lifting components 3, a plurality of drive rollers 306 rotatably connected inside the lifting components 3, and an anti-slip track 307 sleeved on the outer wall of the plurality of drive rollers 306.

[0024] After the device is moved to the designated position using multiple anti-slip tracks 307, the support base 1 is lowered by retracting the telescopic cylinder 303. The Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102 at the bottom of the base then fit tightly against the bottom of the mine. Subsequently, multiple hydraulic cylinders 2 are activated to push the support roof plate 201 up to the top wall of the mine. At the same time, the supporting force generated by the hydraulic cylinders 2 is transmitted through the support base 1 to the Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102. This allows the support roof plate 201 to support the top wall of the mine while the Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102 embed into the shallow surface layer to form a multi-directional engagement. This eliminates the need for manual hammering during the installation of the ground cone and effectively reduces the interference of high-frequency vibrations caused by frequent hammering on the rock mass, thus minimizing the risk of collapse caused by hammering.

[0025] like Figure 1-2 As shown, the outer walls of the telescopic ends of multiple hydraulic cylinders 2 are fixedly connected to the bottom surface of the support top plate 201, and the multiple hydraulic cylinders 2 are distributed in a rectangular array at the four corners of the top surface of the support base 1. Distributing the multiple hydraulic cylinders 2 in a rectangular array at the four corners of the top surface of the support base 1 can make the force of the multiple hydraulic cylinders 2 more uniform when supporting the support top plate 201.

[0026] like Figure 2-3 As shown, the outer wall of the limiting guide rail 304 is slidably connected to the inner center of the limiting component 305, and the outer wall of the limiting guide rail 304 is tightly fitted to the inner wall of the limiting component 305. After the limiting guide rail 304 passes through the limiting component 305, the outer wall of the limiting guide rail 304 can be used to move and limit the limiting component 305 and the lifting component 3.

[0027] like Figure 2-3As shown, the inner center of the top connecting seat 302 is rotatably connected to the outer wall of one end of the telescopic cylinder 303 via a rotating shaft, and the outer wall of the telescopic end of the telescopic cylinder 303 is rotatably connected to the bottom connecting seat 301 via a rotating shaft. The telescopic cylinder 303 can push the lifting assembly 3 to the height of the outer wall of the limit guide rail 304 by the movement of its own telescopic end.

[0028] like Figure 2 As shown, multiple anti-slip tracks 307 are located on both sides of the bottom of the support top plate 201. Placing the anti-slip tracks 307 on both sides of the bottom of the support top plate 201 can make the device have high stability when moving.

[0029] like Figure 4 As shown, a Y-axis anti-slip tooth 101 is provided at the center of the bottom surface of the support base 1, and multiple X-axis anti-slip teeth 102 are provided on both sides of the bottom surface of the support base 1. The bottom surfaces of the Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102 are all provided with a 45-degree bevel. By setting the Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102 on the bottom surface of the support base 1, they can resist the forces from the left and right and the front and back respectively, forming a cross-lock, which enhances the stability of the device when resisting external forces. Furthermore, the 45-degree bevel on the bottom surfaces of the Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102 allows them to cut into the rock strata when they come into contact with the mine surface.

[0030] Working principle: Multiple hydraulic cylinders 2 are distributed in a rectangular array at the four corners of the top surface of the support base 1. This allows for more even force distribution when supporting the top plate 201. After the limiting guide rail 304 passes through the limiting component 305, the outer wall of the limiting guide rail 304 can be used to limit the movement of the limiting component 305 and the lifting component 3. The telescopic cylinder 303, by moving its telescopic end, can push the lifting component 3 to the height of the outer wall of the limiting guide rail 304, thus setting the anti-slip track 307. The anti-slip teeth 101 and X-axis anti-slip teeth 102 are placed on the bottom sides of the support top plate 201, which can make the device more stable when moving. The Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102 are set on the bottom surface of the support base 1, which can resist the forces on the left and right and the front and back respectively, forming a cross lock, which enhances the stability of the device when resisting external forces. Furthermore, the 45-degree angle is opened on the bottom surface of the Y-axis anti-slip teeth 101 and X-axis anti-slip teeth 102, which can cut into the rock layer when contacting the mine surface.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temporary support device for underground coal mines, comprising a support base (1), characterized in that: The top surface of the support base (1) is fixedly connected to multiple hydraulic cylinders (2), and the support base (1) has a support top plate (201) at the center of the top. Multiple lifting components (3) are slidably connected to both sides of the inside of the support base (1), and multiple bottom connecting seats (301) are fixedly connected to both sides of the top surface of the lifting components (3). A top connecting seat (302) is fixedly connected to one side of the outer wall of multiple hydraulic cylinders (2), and a telescopic cylinder (303) is rotatably connected to one side of the outer wall of multiple hydraulic cylinders (2). Limiting guide rails (304) are fixedly connected to both sides of the inner wall of the support base (1). Multiple limiting components (305) are fixedly connected to both sides of the outer wall of the lifting components (3). Multiple drive rollers (306) are rotatably connected inside the lifting components (3), and anti-slip tracks (307) are sleeved on the outer walls of multiple drive rollers (306).

2. The temporary support device for underground coal mines according to claim 1, characterized in that: The outer walls of the telescopic ends of the multiple hydraulic cylinders (2) are fixedly connected to the bottom surface of the support top plate (201), and the multiple hydraulic cylinders (2) are distributed in a rectangular array at the four corners of the top surface of the support base (1).

3. The temporary support device for underground coal mines according to claim 1, characterized in that: The outer wall of the limiting guide rail (304) is slidably connected to the inner center of the limiting component (305), and the outer wall of the limiting guide rail (304) is tightly fitted to the inner wall of the limiting component (305).

4. The temporary support device for underground coal mines according to claim 1, characterized in that: The center of the top connecting seat (302) is rotatably connected to the outer wall of one end of the telescopic cylinder (303) via a rotating shaft, and the outer wall of the telescopic end of the telescopic cylinder (303) is rotatably connected to the bottom connecting seat (301) via a rotating shaft.

5. A temporary support device for underground coal mines according to claim 1, characterized in that: Multiple anti-slip tracks (307) are located on both sides of the bottom of the support top plate (201).

6. A temporary support device for underground coal mines according to claim 1, characterized in that: The support base (1) has a Y-axis anti-slip tooth (101) at the center of its bottom surface.

7. A temporary support device for underground coal mines according to claim 1, characterized in that: The support base (1) has multiple X-axis anti-slip teeth (102) on both sides of its bottom surface, and the Y-axis anti-slip teeth (101) and X-axis anti-slip teeth (102) have 45-degree angles on both sides of their bottom surfaces.

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