Overhead rail traction advance support device

Abstract

The present invention relates to the technical field of coal mining face support devices, specifically an overhead rail type traction advance support device, which includes two or more support devices arranged in sequence, the support device is a door-shaped structure, the width and height of the support device are adjustable, the outer side of the support device is fixed with a walking wheel, the inner side of the columns on both sides of the support device is respectively arranged with an overhead track, the overhead track includes two mutually parallel linear guide rails, the linear guide rails extend along the arrangement direction of the support device, and the overhead track can be pushed and pulled along the direction. It solves the drawbacks of the traditional step-by-step advance support hydraulic support, such as frequent column lowering and frame moving operations, which leads to repeated support and damage to the top plate.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining working face support devices in coal mines, in particular to an overhead rail type traction advance support device. Background Art

[0002] The support must be strengthened within the influence range of the advance pressure at all safety exits and tunnel connections of the coal mining face, and the length of the tunnel with enhanced support shall not be less than 20 m. Traditional advance support is supported by a single pillar. As the working face advances, the single pillar moves from back to front, and the repeated handling and support work is labor-intensive. The support density of tunnels with poor conditions is high, and manual movement is more dangerous. Summary of the invention

[0003] The purpose of the present invention is to provide an overhead rail type traction advance support device, which solves the drawbacks of the traditional step-type advance support hydraulic support, such as frequent column lowering and frame moving operations causing repeated support and damage to the top plate.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is an overhead rail type traction advance support device, which includes two or more support devices arranged in sequence, the support device is a door-like structure, the width and height of the support device can be adjusted, the walking wheels are fixed on the outside of the support device, and the inner sides of the columns on both sides of the support device are respectively arranged with overhead rails. The overhead rails include two mutually parallel linear guide rails, which extend along the arrangement direction of the support device, and the overhead rails can be pushed and pulled along this direction.

[0005] Based on the above technical solution, the one-time top support and return forward support device is mainly used in the transport chute and return air chute of the comprehensive mining face, overcoming the drawback of traditional products that repeated top connection will damage the roof. It has the advantage of one-time top connection to ensure good roof integrity; as the comprehensive mining face advances, the tail support device close to the end support is retracted in its own horizontal and vertical directions, and the walking wheel contacts the overhead track, and then the pneumatic winch or other power pulls the tail support device to the front of the first row of support devices and drops it down, then the support roof is raised, and it is repeated in sequence to achieve the forward movement of the forward support.

[0006] Preferably, the overhead track is an integral whole, extending from the frontmost support device to the rear support device.

[0007] Based on the above technical solution, the overhead track is pulled forward by a hydraulic cylinder, a pneumatic cylinder or other power, so as to avoid the overhead track from being blocked when the tail support device shrinks its width in the horizontal direction. When the tail support device shrinks to a suitable position, the overhead track is pushed backward, so that the running wheels contact the overhead track.

[0008] Furthermore, the support device includes a first telescopic top beam assembly, the first telescopic top beam assembly is connected to the first side beams on both sides, the first side beam is connected to the first base through the first column cylinder, the first auxiliary adjustment jack is installed between the first bases on both sides, the walking wheel is fixed on the outer side of the first side beam, and the inner side of the first column cylinder under the first side beam is provided with a track bracket supporting the overhead track.

[0009] Furthermore, the linear guide rail is a heavy steel rail, and a groove structure is provided on the rail bracket. The bottom of the heavy steel rail is limited in the groove structure and can move inside.

[0010] Furthermore, a track height adjustment jack is fixed at the lower portion of the first side beam, and the track height adjustment jack drives the track bracket to move.

[0011] Furthermore, the device also includes a traction support device arranged at a certain distance in front of the first row of support devices, the traction support device includes a second telescopic top beam assembly, the second telescopic top beam assembly is connected to the second side beams on both sides, the second side beams are connected to the second base through a second column cylinder, a second auxiliary adjustment jack is installed between the second bases on both sides, a track push-pull jack is fixed on the inner side of the second column cylinder under the second telescopic top beam assembly, and the track push-pull jack pushes and pulls the overhead track.

[0012] Furthermore, a bracket height adjustment jack is fixed at the lower portion of the second side beam, and the bracket height adjustment jack drives the track push-pull jack to move.

[0013] Furthermore, the second telescopic top beam assembly includes a second top beam in the middle and two second telescopic beams movably connected to two sides of the second top beam, and a pneumatic winch is fixed at the bottom of the second top beam.

[0014] Furthermore, a second auxiliary frame adjustment jack is fixed between the two second bases.

[0015] Beneficial effects of the present invention:

[0016] By migrating the support device, the rear frame is changed to the front frame to avoid repeated support of the tunnel roof; it is suitable for tunnels of different widths, rectangular tunnels and special-shaped tunnels in the comprehensive mining working face; it can achieve one-time support of the entire mining impact area by a certain distance in advance (determined according to actual working conditions). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the movement process of the tail support device of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the traction support device;

[0019] Figure 3 is a structural schematic diagram of the support device;

[0020] Figure 4 It is a structural schematic diagram of the telescopic top beam assembly;

[0021] Figure 5 It is a top view of the traction support device;

[0022] Figure 6 for Figure 5 A partial enlarged view of part I;

[0023] Figure 7 for Figure 6 Side view of the middle track connector;

[0024] In the figure: 1. traction support device, 1.1. second base, 1.1.1. second bottom plate, 1.1.2. second side plate, 1.2. second column cylinder, 1.3. second side beam, 1.4. second telescopic top beam assembly, 1.4.1. second top beam, 1.4.2. second telescopic beam, 1.5. second auxiliary frame adjustment jack, 1.6. stepping jack, 1.7. second walking wheel, 1.8. bracket height adjustment jack, 1.9. track push-pull jack, 1.10. pneumatic winch,

[0025] 2. Support device, 2.1. First base, 2.1.1. First bottom plate, 2.1.2. First side plate, 2.2. First column cylinder, 2.3. First side beam, 2.4. First telescopic top beam assembly, 2.4.1. First top beam, 2.4.2. First telescopic beam, 2.5. First auxiliary frame adjustment jack, 2.6. First walking wheel, 2.7. Track height adjustment jack, 2.8. Track bracket, 2.8.1. Groove structure,

[0026] 3. Overhead track, 3.1. Linear guide. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] The overhead rail traction advance support device is arranged in the transport tunnel or return air tunnel of the working face and at the front end of the fully mechanized mining working face. It is used to support the transport tunnel and return air tunnel during the fully mechanized mining work in the coal mine underground to prevent the deformation, movement and damage of the tunnel surrounding rock caused by the superposition of the working face advance support pressure and the support pressure along the inclined direction.

[0029] like Figure 1As shown, the overhead rail type traction advance support device includes a traction support device 1, a support device 2 and an overhead track 3; wherein, a plurality of support devices 2 are arranged in sequence from the tail row to the first row along the extension direction of the tunnel, and adjacent support devices 2 are spaced 300mm apart and are ensured to be parallel to each other, and are used to support the top plate. The traction support device 1 is arranged 1900mm in front of the first row of support devices 2, and is used to transport the tail support device 2 to the front end; the overhead track 3 is arranged along the moving direction of the support device 2, and plays a supporting and guiding role when transporting the support device.

[0030] like Figure 2 As shown, the support device 2 includes two symmetrically arranged first bases 2.1, each of which includes a first bottom plate 2.1.1 and two first side plates 2.1.2 fixedly connected to the first bottom plate 2.1.1, the two first side plates 2.1.2 are oppositely arranged, and two first column cylinders 2.2 arranged side by side and capable of adjusting the height of the support device 2 are installed on the upper part of the first bottom plate 2.1.1 and located between the two first side plates 2.1.2; the first side beam 2.3 is fixed to the top end of the first column cylinder 2.2, and the first side beams 2.3 on both sides are connected by a first telescopic top beam assembly 2.4, the first telescopic top beam assembly 2.4 includes a first top beam 2.4.1 in the middle and two first telescopic beams 2.4.2 movably connected to both sides of the first top beam 2.4.1, and the first column cylinders 2.2 on both sides and the first telescopic top beam assembly 2.4 form a gantry structure. A first auxiliary adjustment jack 2.5 is installed between the inner sides of the first bottom plates 2.1.1 on both sides to adjust the width of the entire support device 2 so as to adapt to lanes of different widths.

[0031] Two rotatable first running wheels 2.6 are fixed on the outer side of each first side beam 2.3. Two track height adjustment jacks 2.7 are installed at the lower part of the first side beam 2.3. The moving end of the track height adjustment jack 2.7 is fixed to the track bracket 2.8 on the inner side of the "gantry structure". The overhead track 3 is set on the track bracket 2.8. The track height can be adjusted by adjusting the track height adjustment jack 2.7, and the flatness of the overhead track 3 can be further adjusted. The overhead track 3 is two parallel linear guide rails 3.1. The linear guide rails 3.1 can be heavy steel rails. The track bracket 2.8 is provided with a groove structure 2.8.1. The bottom of the heavy steel rail is limited in the groove structure 2.8.1 and can move inside. The groove structure 2.8.1 can be a hook structure set inward, a T-slot structure or other structure that cooperates with the guide rail.

[0032] It should be noted that the first running wheel 2.6 on the outer side surface of the first side beam 2.3 can cooperate with the overhead track 3 set on the upper part of the track bracket 2.8.

[0033] like Figure 1As shown, the overhead track 3 is two linear guide rails 3.1 parallel to each other, each linear guide rail 3.1 is an integral track, and each linear guide rail 3.1 is connected to a track push-pull jack 1.9. The track push-pull jack 1.9 can drive the linear guide rail 3.1 to move along the extension direction of the guide rail, thereby avoiding the linear guide rail 3.1 from affecting the extension and retraction of the rearmost support device of the support device 2.

[0034] like Figure 3 The traction support device 1 comprises two symmetrically arranged second bases 1.1, each of which comprises a second bottom plate 1.1.1 and two second side plates 1.1.2 fixedly connected to the second bottom plate 1.1.1, the two second side plates 1.1.2 are arranged opposite to each other, and two second column cylinders 1.2 arranged side by side and capable of adjusting the height of the traction support device are installed between the two second side plates 1.1.2; the top of the second column cylinder 1.2 is fixed with a second side beam 1.3, and the second side beams 1.3 on both sides are connected by a second telescopic top beam assembly 1.4, the second telescopic top beam assembly 1.4 comprises a second top beam 1.4.1 in the middle and two second telescopic beams 1.4.2 movably connected to both sides of the second top beam 1.4.1, and the second column cylinders 1.2 on both sides and the second telescopic top beam assembly 1.4 etc. form a gantry structure. A second auxiliary adjustment frame jack 1.5 is installed between the inner sides of the second bases 1.1 on both sides, which is used to adjust the width of the entire traction support device 1, so as to adapt to lanes of different widths.

[0035] The traction support device 1 is similar in structure to the support device 2, except that, firstly, a stepping jack 1.6 is installed on the upper part of the base to move the traction support device 1 and to leave a suitable distance for the support device 2 moving from the tail. The second column cylinder 1.2 is fixed between the second side plates 1.1.2 above the stepping jack 1.6.

[0036] Secondly, two rotatable second walking wheels 1.7 are fixed on the outer side surface of each second side beam 1.3, and two bracket height adjustment jacks 1.8 are installed on the lower part of the second side beam 1.3. The movable ends of the two bracket height adjustment jacks 1.8 are detachably fixed with track push-pull jacks 1.9, and the track push-pull jacks 1.9 serve as the above-mentioned device for adjusting the linear guide rail 3.1 to move along the extension direction of the guide rail.

[0037] Again, a pneumatic winch 1.10 is installed on the lower surface of the top beam at the middle position of the upper part of the traction support device 1, and the pneumatic winch 1.10 provides power when the traction support device 1 moves the support device 2 at the rear to the front.

[0038] It should be noted that the "expansion" and "contraction" of the traction support device 1 and the support device 2 include two directions. The auxiliary frame adjustment jack (the first auxiliary frame adjustment jack 2.5 and the second auxiliary frame adjustment jack 1.5) are used to adjust the lateral width, and the double telescopic column cylinder (the first column cylinder 2.2 and the second column cylinder 1.2) are used to adjust the longitudinal height. Among them, the auxiliary frame adjustment jack can use the common double-acting jack in common knowledge, and the adjustable range is: 3050mm~4150mm. The auxiliary frame adjustment jack is mainly composed of a cylinder body, a piston, a piston rod, a guide sleeve and various seals. The double telescopic column cylinder bears the load of the top plate and is the main load-bearing component of the bracket. The column is required to have sufficient strength, reliable operation and long service life. The double telescopic column cylinder has a large height adjustment range and is composed of a first-stage cylinder, a second-stage cylinder, a guide sleeve and various seals. The initial support force of the column usually refers to the support capacity of the large cavity of the column under the pressure of the pump station. The size of the initial support force directly affects the support performance of the bracket. Reasonable selection of the initial support force of the bracket can slow down the sinking of the roof, which is beneficial to the management of the roof. This device can use a column cylinder with a diameter of φ200mm and an initial support force of 990KN. The working resistance of the column refers to the pressure increase in the lower chamber of the column cylinder under the action of external load. When the pressure exceeds the set pressure of the safety valve controlling the column, the safety valve discharges and the column begins to unload. At this time, the force that the column can withstand is the working resistance. The working resistance of the column cylinder (the first column cylinder 2.2 and the second column cylinder 1.2) that can be used in this device is 1200KN.

[0039] like Figure 1As shown, 2-A, 2-B, 2-C, 2-D, 2-E, and 2-F are different states of the tail support device 2 moving forward. In the initial state, the traction support device 1 and several support devices 2 are arranged in sequence. The stepping jacks 1.6 on the second bases 1.1 on both sides of the traction support device 1 act to move the traction support device 1 forward. The track push-pull jacks 1.9 installed under the second telescopic top beam assembly 1.4 of the traction support device 1 are in a retracted state. At the same time, as the traction support device 1 moves forward, the overhead track 3 connected thereto is driven to move forward, and the linear guide rails 3.1 on both sides move on the track brackets on the inner side of the support device 2. After the movement, the overhead track 3 on the inner side of the rearmost support device 2 is "pulled out" forward, and the rearmost support device 2 is retracted, including the The width of the entire traction support device 1 is adjusted by the first auxiliary adjustment jack 2.5, and the height of the support device 2 is adjusted by the first column cylinder 2.2. When adjusted to a suitable position, the track push-pull jack 1.9 on the inner side of the traction support device 1 extends to push the overhead track 3 to move below the first running wheel 2.6 on the outer side of the first side beam 2.3 of the retracted tail support device 2, and the first running wheel 2.6 is connected to the overhead track 3. The first column cylinder 2.2 of the tail support device 2 is retracted, and the first base 2.1 is lifted. The pneumatic winch 1.10 on the traction support device 1 pulls the tail support device 2 forward to the front end, and the first column cylinder 2.2 of the support device 2 is extended, and the first base 2.1 falls. The connection between the track push-pull jack 1.9 and the overhead track 3 is disassembled, as shown in FIG. Figure 5-Figure 7 As shown, the connection between the two can be made by a pin shaft. Specifically, a track connector can be set at the front end of the track push-pull jack 1.9, and the track connector is connected to the overhead track 3 by a pin shaft. After disassembling the connection between the track push-pull jack 1.9 and the overhead track 3, the track push-pull jack 1.9 is retracted, and the support device 2 moved from the tail to the front is unfolded, and the track push-pull jack 1.9 is extended, reconnected with the overhead track 3, and then retracted to complete the forward movement of a support device 2. Before the next rear support device 2 is moved forward, the track push-pull jack 1.9 is extended, and the track push-pull jack 1.9 is reconnected with the overhead track 3. The whole process is cyclically carried out, and the rear support device 2 is migrated from the back to the front to the front spacing of 300mm of the first row of support devices 2. The migration process is dragged by the pneumatic winch 1.10 of the traction support device 1 and migrated along the overhead track 3.

[0040] The overhead rail type traction advance support device of the present invention has an adjustable width and height. It can be connected to the top once, overcoming the disadvantages of repeated connection. Each group of supports moves forward without suspended tracks. The working resistance is large and the steel beam is well supported. A special hydraulic vehicle is provided for the installation and withdrawal of the supports. It can be used for transportation and return. In addition, the laying length can be selected by oneself. According to the specific working conditions, the number of the supporting devices can be reasonably set to ensure the best laying length.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. Overhead rail traction advance support device, characterized by: It includes two or more supporting devices arranged in sequence, the supporting device is a door-shaped structure, the width and height of the supporting device are adjustable, the outer side of the supporting device is fixed with a running wheel, the inner side of the columns on both sides of the supporting device is respectively provided with an overhead track, the overhead track includes two mutually parallel linear guide rails, the linear guide rails extend along the arrangement direction of the supporting device, and the overhead track can be pushed and pulled along this direction; The overhead track is a whole, extending from the front row support device to the rear row support device; The support device comprises a first telescopic top beam assembly, the first telescopic top beam assembly is connected to the first side beams on both sides, the first side beam is connected to the first base through the first column cylinder, a first auxiliary frame adjustment jack is installed between the first bases on both sides, a travel wheel is fixed on the outer side of the first side beam, and a track bracket supporting the overhead track is provided on the inner side of the first column cylinder below the first side beam; The device also includes a traction support device arranged at a certain distance in front of the first row of support devices, the traction support device includes a second telescopic top beam assembly, the second telescopic top beam assembly is connected to the second side beams on both sides, the second side beams are connected to the second base through the second column cylinder, and a second auxiliary adjustment jack is installed between the second bases on both sides. The track push-pull jack is fixed on the inner side of the second column cylinder under the second telescopic top beam assembly, and the track push-pull jack pushes and pulls the overhead track.

2. The overhead rail type traction advance support device according to claim 1 is characterized in that: The linear guide rail is a heavy steel rail, a groove structure is provided on the rail bracket, and the bottom of the heavy steel rail is limited in the groove structure and can move inside.

3. The overhead rail type traction advance support device according to claim 2 is characterized in that: The groove-like structure is a hook-like structure in which the bottom of the heavy rail is restrained.

4. The overhead rail type traction advance support device according to claim 1, characterized in that: A track height adjustment jack is fixed at the lower part of the first side beam, and the track height adjustment jack drives the track bracket to move.

5. The overhead rail type traction advance support device according to claim 1, characterized in that: A bracket height adjustment jack is fixed at the lower part of the second side beam, and the bracket height adjustment jack drives the track push-pull jack to move.

6. The overhead rail type traction advance support device according to claim 1, characterized in that: The second telescopic top beam assembly includes a second top beam in the middle and two second telescopic beams movably connected to two sides of the second top beam, and a pneumatic winch is fixed at the bottom of the second top beam.

7. The overhead rail type traction advance support device according to claim 1, characterized in that: A second auxiliary frame adjustment jack is fixed between the two second bases.

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