A pusher device for lightweight support equipment in coal mines

Abstract

This utility model relates to a pusher device for a lightweight support system in coal mines, comprising a pusher seat, a pusher jack fixedly mounted on the pusher seat, and at least two fixed sleeves fixedly connected to the pusher seat. The lower ends of the support legs extend into the fixed sleeves. The pusher jack extends forward toward the scraper conveyor, and a movable push beam is installed at the extended end of the pusher jack. The front side of the movable push beam is adapted to the rear side of the scraper conveyor. This utility model completely solves the problem of mismatch between the 1-meter center distance of the combined support and chain suspension support and the middle trough of the 1.5-meter scraper conveyor by applying thrust through the pusher jack. The movable push beam transmits force through surface contact with the middle trough of the scraper conveyor, solving the problem of easy damage to the middle trough caused by the traditional scraper conveyor using ear plate connection and point contact in the pusher mechanism. Furthermore, the pusher device does not require a pin connection with the middle trough of the scraper conveyor, solving the problem of mutual interference between the pusher device and the pusher mechanism of the support.

Description

Technical Field

[0001] This utility model relates to the field of coal mine equipment technology, and in particular to equipment for pushing scraper conveyors during mechanized coal mining, specifically a pusher device for a lightweight support system in coal mines. Background Technology

[0002] The key to mechanized coal mining is the proper matching of equipment. In some small and medium-sized coal mines, due to narrow roadways and poor coal occurrence conditions, such as steeply inclined coal seams and multi-fault coal seams, it is impossible to form a large working face, making it unsuitable for mechanized mining using fully mechanized mining supports. Fully mechanized mining supports are characterized by high working resistance, bulky structure, enormous weight, and significant investment costs, making them suitable for large coal mines. However, for some small and medium-sized coal mines, especially local private mines, constraints such as roadway width, transportation capacity, and funding prevent the adoption of fully mechanized mining supports.

[0003] To achieve safe support in small and medium-sized coal mines, lightweight support equipment such as combined supports and chain suspension supports are widely used due to their advantages of light weight, low cost, portability, flexibility, and easy installation and removal.

[0004] However, since the center distance of the combined support and chain suspension support is 1 meter, there is a mismatch problem with the central trough of the 1.5-meter-long scraper conveyor. The traditional 1.5-meter-long central trough with pusher plates cannot be matched one-to-one with the support with a center distance of 1 meter, so the pushing of the scraper conveyor on the working face still requires manual operation.

[0005] Furthermore, due to the narrowness of coal mine roadways and the resulting restrictions on transportation, the weight of the central trough of the scraper conveyor must be reduced accordingly. If a traditional central trough with pusher lugs is used, the push is only a localized point, which can easily damage the central trough. Utility Model Content

[0006] This utility model addresses the shortcomings of existing technologies by providing a pusher device for lightweight support equipment in coal mines, which solves the problem of mismatch between the 1-meter center-distance combination and the chain suspension hydraulic support and the middle trough of the 1.5-meter long scraper conveyor.

[0007] This utility model is achieved through the following technical solution: a pusher device for a lightweight support equipment in a coal mine is provided, including a pusher seat, a pusher jack fixedly mounted on the pusher seat, and at least two fixed sleeves fixedly connected to the pusher seat. The lower ends of the support legs of the support equipment extend into the fixed sleeves. The pusher jack extends forward toward the scraper conveyor, and a movable push beam is installed at the extended end of the pusher jack. The length direction of the movable push beam is consistent with the length direction of the scraper conveyor, and the front side of the movable push beam is adapted to the rear side of the scraper conveyor.

[0008] In use, this solution utilizes support equipment to press and fix the pusher seat, and pushes the scraper conveyor forward by a pusher jack. The movable push beam and the scraper conveyor are in surface contact, which increases the contact area and avoids the problem of damage to the middle trough that exists in traditional scraper conveyors where the middle trough is connected by an ear plate to the pusher mechanism.

[0009] As an optimization, two fixed sleeves are used, with the pushing jack positioned between them. Guide rods are provided on the left and right sides of the pushing jack, with the front end of the guide rod connected to the movable push beam and the rear end passing through a guide plate fixed to the fixed sleeve. The guide plate has guide holes adapted to the guide rods. This optimized solution uses two fixed sleeves to fit the legs of the chain suspension bracket unit, avoiding excessive length of the pushing device and increasing installation difficulty, while also improving the flexibility of use. Positioning the pushing jack between the two fixed sleeves and providing guide rods on both sides improves the consistency of force on the movable push beam, thereby ensuring the pushing effect and preventing deflection.

[0010] As an optimization, the movable push beam is a rectangular box structure. The front ends of the guide rod and the pushing jack both extend into the inner cavity of the movable push beam through the rear side plate. The top plate of the movable push beam is provided with a first connecting pin that passes downward through the guide rod, and a second connecting pin that passes downward through the piston rod of the pushing jack. This optimized solution sets the movable push beam as a rectangular box structure, which improves its bending resistance and provides internal protective space for the connection of the guide rod and the pushing jack. It also facilitates connection by passing through the connecting pins. The vertically arranged first and second connecting pins not only achieve reliable force transmission in the front-to-back direction, but also facilitate installation and disassembly.

[0011] As an optimization, reinforcing blocks are welded to the top surface of the movable push beam, corresponding to the through holes of the first and second connecting pins, respectively. The first and second connecting pins pass downwards through the reinforcing blocks and the top plate of the movable push beam, respectively. This optimization scheme strengthens the through holes of the first and second connecting pins on the movable push beam by setting reinforcing blocks, ensuring the structural strength of the connecting pin through holes.

[0012] As an optimization, slots are provided on the opposite side walls of the two fixed sleeves. Limiting blocks extending into the two slots are fixed to the cylinder of the pushing jack. A fixing pin, passing through the limiting block in the front-to-back direction, is inserted through the side plate of the slot. This optimized solution utilizes the slots to limit the limiting blocks, thus fixing the pushing jack in the front-to-back direction and providing lateral support to ensure the pushing effect. Simultaneously, the fixing pin further restricts the limiting blocks and the pushing jack, preventing displacement of the pushing jack.

[0013] As an optimization, the side of the guide plate is welded to the fixed sleeve, and the bottom edge of the guide plate is welded to the pusher seat. This optimized one-way plate not only provides guidance and support for the guide rod but also acts as a reinforcing rib, improving the reliability of the connection between the fixed sleeve and the pusher seat.

[0014] As an optimization, a column shoe pin is provided on the side wall of the fixed sleeve, which passes radially through the support equipment leg. This optimization scheme improves the reliability of the connection between the support equipment leg and the fixed sleeve by setting the column shoe pin, and avoids the separation of the support equipment leg and the fixed sleeve.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. By pressing and fixing the support equipment with the outriggers and applying thrust by pushing jacks, the problem of mismatch between the 1-meter center distance of the combined support and chain suspension support and the middle trough of the 1.5-meter scraper conveyor was completely solved.

[0017] 2. The movable push beam contacts the middle trough surface of the scraper conveyor to transmit force, which solves the problem that the middle trough of the traditional scraper conveyor is connected by ear plates and the pushing mechanism is a point contact, which easily damages the middle trough.

[0018] 3. This pusher device does not require a pin connection with the middle trough of the scraper conveyor, which solves the problem of mutual interference between the pusher device and the pusher mechanism built into the support during the movement of the support or the pusher. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a diagram showing the application of this utility model to a chain suspension bracket;

[0021] Figure 3 This is a diagram showing the application of this utility model to a combined support frame.

[0022] Figure 4 for Figure 1 Enlarged view of a portion of the image;

[0023] As shown in the figure:

[0024] 1. Movable push beam; 2. First connecting pin; 3. Second connecting pin; 4. Push jack; 5. Column shoe pin; 6. Fixed pin; 7. Guide rod; 8. Push seat; 9. Fixed sleeve; 10. Guide plate; 11. Coal mining machine; 12. Scraper conveyor; 13. Chain suspension support; 14. Push conveyor device; 15. Combined support. Detailed Implementation

[0025] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0026] A pusher device for a lightweight support equipment in a coal mine includes a pusher seat 8, a pusher jack 4 fixedly mounted on the pusher seat 8, and at least two fixed sleeves 9 fixedly connected to the pusher seat 8. In this embodiment, the fixed sleeves correspond to the legs of the support equipment on the side near the scraper conveyor 12, and the lower ends of the legs of the support equipment extend into the corresponding fixed sleeves 9.

[0027] In this embodiment, the inner hole of the fixed sleeve is through the top and bottom, and the inner diameter is adapted to the outer diameter of the support leg. The lower end of the fixed sleeve is welded to the upper surface of the push seat, and the lower end of the support leg is supported on the push seat corresponding to the inner hole of the fixed sleeve.

[0028] The fixed sleeve is provided with a column shoe pin 5 that passes radially through the support leg of the support equipment. The axis of the column shoe pin extends in the front-back direction, making installation and disassembly more convenient and avoiding interference with the push jack and guide rod. The column shoe pin 5 also prevents the fixed sleeve from separating from the support leg of the support equipment.

[0029] As a preferred embodiment, this embodiment uses two fixed sleeves, arranged side by side, with the distance between them matching the distance between the outriggers on the side of the support equipment closest to the scraper conveyor. A pushing jack 4 is located between the two fixed sleeves. Guide rods 7 are respectively provided on the left and right sides of the pushing jack, with the pushing jack and guide rods parallel to each other. The front end of the guide rod 7 is connected to the movable push beam 1, and the rear end of the guide rod passes through a guide plate 10 fixed to the fixed sleeve. The guide plate 10 has guide holes adapted to the guide rods, and the guide rods are slidably connected to the wall of the guide holes. The side of the guide plate is welded to the fixed sleeve, and the bottom edge of the guide plate is welded to the pushing seat, thus enabling the guide plate to simultaneously improve the connection strength between the fixed sleeve and the guide plate. In this embodiment, the guide plate is located on the side of the fixed sleeve furthest from the pushing jack, in order to increase the distance between the two guide rods and improve the guiding effect.

[0030] The piston rod of the push jack 4 extends forward toward the scraper conveyor, and a movable push beam 1 is installed at the front end of the piston rod of the push jack. The length direction of the movable push beam 1 is consistent with the length direction of the scraper conveyor, and the front side of the movable push beam is adapted to the rear side of the scraper conveyor.

[0031] Specifically, the movable push beam 1 has a rectangular box structure. The guide rod 7 and the front end of the push jack both extend through the rear side plate of the movable push beam into the inner cavity of the movable push beam. The top plate of the movable push beam is provided with a first connecting pin 2 that passes downward through the guide rod and a second connecting pin 3 that passes downward through the piston rod of the push jack. The top plate of the movable push beam is provided with through holes that are adapted to the first connecting pin and the second connecting pin respectively.

[0032] To ensure structural strength, in this embodiment, reinforcing blocks corresponding to the through holes of the first connecting pin and the second connecting pin are welded to the top surface of the movable push beam. The first connecting pin and the second connecting pin pass through the reinforcing blocks and the top plate of the movable push beam in sequence.

[0033] In this embodiment, both the first connecting pin and the second connecting pin are stepped pins, with the upper steps of the first connecting pin and the second connecting pin supported on the upper surface of the reinforcing block.

[0034] The two fixed sleeves 9 have slots on their opposite side walls. Limiting blocks extending into the two slots are fixed to the cylinder of the jack. A fixing pin 6, passing through the limiting block in the front-to-back direction, is inserted through the side plate of each slot. In this embodiment, the slots are formed by two opposing locking plates, which are welded to the fixed sleeves. Through holes are provided on the locking plates for the fixing pin 6 to pass through, further securing the jack to ensure proper pushing action.

[0035] In use, the pusher device 14 is connected to the legs of the combined support or chain suspension support via the column shoe pin 5. When the combined support 15 or chain suspension support 13 is in a supported and load-bearing state, the pusher seat 8 is pressed and fixed by the support column, and the pusher jack extends forward toward the middle trough of the scraper conveyor, pushing the scraper conveyor 12 forward. The front side of the movable push beam and the rear side of the middle trough of the scraper conveyor are both planar structures, making the contact between the pusher device and the middle trough of the scraper conveyor a surface contact. This solves the problem of traditional scraper conveyors using ear plates for the middle trough connection and point contact for the pusher mechanism, which easily damages the middle trough. Moreover, the pusher device is not connected to the middle trough of the scraper conveyor by a pin, solving the problem of mutual interference between the pusher device and the pusher mechanism built into the support during the movement or pusher process in the prior art. When pushing the conveyor, pay attention to the movement of the scraper conveyor on the entire working face. If the movement of the scraper conveyor is found to be partially obstructed, stop pushing the scraper conveyor immediately and clear the coal at the obstruction point to prevent damage to the scraper conveyor.

[0036] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A pusher device for a lightweight support system in a coal mine, characterized in that: Includes a pusher seat (8), a pusher jack (4) fixed on the pusher seat (8), and at least two fixed sleeves (9) fixed to the pusher seat (8), with the lower ends of the outriggers of the support equipment extending into the fixed sleeves (9); The push jack (4) extends forward toward the scraper conveyor, and the extended end of the push jack is equipped with a movable push beam (1). The length direction of the movable push beam (1) is consistent with the length direction of the scraper conveyor, and the front side of the movable push beam is adapted to the rear side of the scraper conveyor.

2. The pusher device of a light support equipment for coal mine according to claim 1, characterized in that: There are two fixed sleeves, and the push jack is located between the two fixed sleeves. Guide rods (7) are respectively provided on the left and right sides of the push jack. The front end of the guide rod (7) is connected to the movable push beam (1), and the rear end of the guide rod passes through the guide plate (10) which is fixed to the fixed sleeve. The guide plate (10) is provided with a guide hole that matches the guide rod.

3. The pusher device of a light support equipment for coal mine according to claim 2, characterized in that: The movable push beam (1) is a rectangular box structure. The guide rod (7) and the front end of the push jack both extend through the rear side plate of the movable push beam to the inner cavity of the movable push beam. The top plate of the movable push beam is provided with a first connecting pin (2) that passes downward through the guide rod and a second connecting pin (3) that passes downward through the piston rod of the push jack.

4. The pusher device of a light support equipment for coal mine according to claim 3, characterized in that: The top surface of the movable push beam is welded with reinforcing blocks corresponding to the through holes of the first connecting pin and the second connecting pin, respectively. The first connecting pin and the second connecting pin pass through the reinforcing blocks and the top plate of the movable push beam in sequence downwards.

5. The pusher device of a light support equipment for coal mine according to claim 2, characterized in that: The two fixed sleeves are provided with slots on their opposite side walls. The cylinder of the jack is fixed with limiting blocks that extend to the two slots respectively. The side plates of the slots are provided with fixed pins that pass through the limiting blocks in the front-back direction.

6. The pusher device for a lightweight support system in a coal mine according to claim 2, characterized in that: The side of the guide plate is welded to the fixed sleeve, and the bottom edge of the guide plate is welded to the push seat.

7. The pusher device of a light support equipment for coal mine according to claim 1, characterized in that: A column shoe pin (5) is provided on the side wall of the fixed sleeve, which passes radially through the support leg of the support equipment.

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