Stepping type shield support

Abstract

The invention belongs to the field of coal mine supporting equipment, and provides a stepping type shield support which comprises an outer support, an inner support and a walking oil cylinder. The outer support and the inner support are arranged in the opposite limiting sliding grooves in a staggered mode. The fixed end of the walking oil cylinder is hinged and fixed to the cross beam surface of the outer support, and the output shaft end is hinged and fixed to the cross beam surface of the inner support. By means of the mode that the inner support and the outer support move forwards alternately, automatic forward moving and steering of the shield support can be achieved; the same electromagnetic valve is used for controlling the four supporting leg oil cylinders of the inner and outer brackets to stretch out and draw back simultaneously, so that the problem that the supporting leg oil cylinders stretch out and draw back synchronously can be solved; meanwhile, the four supporting leg oil cylinders can be independently controlled to stretch out and draw back, and the problem that the excavation efficiency is affected under the condition that the bottom face of the roadway is uneven can be solved.

Description

Technical Field

[0001] The invention relates to a step-type shielding support and belongs to the field of coal mine supporting equipment. Background Art

[0002] When mining in coal mine tunnels, in order to make full use of time and space, realize parallel excavation and anchoring, and improve the single advance of the arm-type tunnel boring machine, a sliding support is often used. The stepping sliding support is a common equipment for underground support in coal mines. The conventional design is to provide two front and rear guide rods and a stepping jack between the main beam and the auxiliary beam. The front and rear ends of the stepping jack are respectively on the two guide rods and move on the two guide rods. The Chinese invention patent with patent number CN201110176078.5 discloses a comprehensive mining method of a steeply inclined longwall drilling coal mining machine combined with a hydraulic shielding support, which can effectively avoid the coal falling from drilling and blasting on the working face, the mining conditions are safe and reliable, the mining process is simple, the operation is simple, time-saving and labor-saving, and the degree of mechanization is high; the Chinese utility model patent with patent number CN200920226256.9 provides a self-moving forward exploration support for a comprehensive excavation working face, which can realize the mechanical automation of the comprehensive excavation working face support, improve safety and work efficiency.

[0003] However, the inventor of the present invention found that the existing technology has the following problems: the existing fully mechanized mining support (including top coal caving support) is heavy, has poor adaptability, is inconvenient to install and withdraw, cannot be used in working faces with complex geological conditions or when the cost per ton of coal is too high, and when the bottom surface of the tunnel is uneven, the working efficiency is low or even cannot work. Therefore, improvements are needed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a walking type shielding bracket, which can solve the problem of low working efficiency when the support cylinders are out of sync and the bottom surface of the tunnel is uneven.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a step-type shielding support, comprising an outer support, an inner support and a walking cylinder; the outer support and the inner support are alternately placed in each other's limiting slide grooves; the fixed end of the walking cylinder is hinged and fixed to the crossbeam surface of the outer support, and the end of the output shaft end is hinged and fixed to the crossbeam surface of the inner support; the inner support comprises an inner support crossbeam, an inner support telescopic leg, an inner support limiting slide groove, an inner support moving rod and an inner support fixing seat; the two end surfaces of the inner support crossbeam are fixedly connected to the side surfaces of the inner support telescopic leg, and the inner support crossbeams are arranged in parallel; the upper surface array of the inner support crossbeams arranged in parallel is fixedly connected to the inner support fixing seat; the inner support fixing seat located on the same horizontal line is threadedly connected with the array of inner support moving rods; the end surface of the inner support telescopic leg is fixedly connected to the inner support telescopic leg.

[0007] The inner support telescopic legs include an inner leg fixed shaft, an inner leg movable shaft and an inner leg foot; the inner leg movable shaft is sleeved in the inner leg fixed shaft and is slidably connected to the inner leg fixed shaft.

[0008] The inner leg moving shaft has an inner leg foot fixedly connected to its end; and an inner leg oil hole is arranged on the surface of the inner leg moving shaft.

[0009] The outer bracket includes an outer bracket crossbeam, an outer bracket telescopic leg, an outer bracket limiting slide groove, an outer bracket moving rod and an outer bracket fixing seat; the two end surfaces of the outer bracket crossbeam are fixed on the side surfaces of the outer bracket telescopic leg; the top end surface of the outer bracket telescopic leg is fixedly connected to the outer bracket fixing seat.

[0010] The outer support fixing base on the same horizontal line is fixedly connected with the outer support moving rod.

[0011] The outer support telescopic legs include an outer leg fixed shaft, an outer leg movable shaft and an outer leg foot; the outer leg fixed shaft is sleeved with the outer leg movable shaft and is slidably connected with the outer leg movable shaft.

[0012] The end of the outer leg moving shaft is fixedly connected with an outer leg foot; and the surface of the outer leg moving shaft is provided with an outer leg oil hole.

[0013] The outer bracket also includes a first mounting bracket and a hydraulic pump; the first mounting bracket is fixedly connected to the outermost outer bracket moving rod; and the bottom surface of the first mounting bracket is fixedly connected to the hydraulic pump.

[0014] The outer bracket also includes a second mounting frame, a control rod seat and a control cabinet; the second mounting frame is fixedly connected to the other outermost outer bracket moving rod; one side of the bottom surface of the second mounting frame is fixedly connected to the control rod seat, and the other side is fixedly connected to the control cabinet.

[0015] The outer support also includes a steering cylinder; the steering cylinder is fixed to the surface of the outer support crossbeam through a connecting piece.

[0016] The beneficial effects of the present invention are as follows: by adopting the method of alternating the advancement of the inner and outer supports, the automatic forward movement and steering of the shielding support can be realized; using the same solenoid valve to simultaneously control the extension and retraction of the four outrigger cylinders of the inner and outer supports can solve the problem of asynchronous extension and retraction of the outrigger cylinders; at the same time, the four outrigger cylinders can also be controlled to retract individually, which can solve the problem of affecting the excavation efficiency when the bottom surface of the tunnel is uneven. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structure diagram of the present invention; Figure 2 yes Figure 1 Structure diagram of the middle inner bracket; Figure 3 yes Figure 1 Diagram of the structure of the Chinese and foreign brackets; Figure 4 yes Figure 3 Installation structure diagram of the steering cylinder.

[0018] In the figure: 1-external support, 11-external support crossbeam, 12-external support telescopic support leg, 121-external support fixed axis, 122-external support moving axis, 123-external support foot, 124-external support oil hole, 13-external support limiting slide, 14-external support moving rod, 15-external support fixed seat, 16-first mounting frame, 17-hydraulic pump, 18-second mounting frame, 19-control rod seat, 110-control cabinet, 111-steering cylinder, 2-inner support, 21-inner support crossbeam, 22-inner support telescopic support leg, 221-inner support fixed axis, 222-inner leg moving axis, 223-inner leg foot, 224-inner leg oil hole, 23-inner support limiting slide, 24-inner support moving rod, 25-inner support fixed seat, 3-travel cylinder. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0020] The first embodiment of the present invention relates to Figure 1-4 The walking shield support shown in the figure comprises an outer support 1, an inner support 2 and a travel cylinder 3; the outer support 1 and the inner support 2 are placed alternately in each other's limiting slide grooves; the fixed end of the travel cylinder 3 is hingedly fixed to the crossbeam surface of the outer support 1, and the end of the output shaft end is hingedly fixed to the crossbeam surface of the inner support 2; the inner support 2 comprises an inner support crossbeam 21, an inner support telescopic leg 22, an inner support limiting slide groove 23, an inner support moving rod 24 and an inner support fixing seat 25; the two end surfaces of the inner support crossbeam 21 are fixedly connected to the side surfaces of the inner support telescopic leg 22, and the inner support crossbeams 21 are arranged in parallel; the upper surface array of the parallel arranged inner support crossbeams 21 is fixedly connected with the inner support fixing seat 25 ; An array of inner bracket moving rods 24 are threadedly connected to the inner bracket fixing seat 25 located on the same horizontal line; the inner bracket telescopic legs 22 are fixedly connected to the end faces of the inner bracket telescopic legs 22; the outer bracket 1 and the inner bracket 2 are both integral brackets that move separately; the extension and retraction of the walking cylinder 3 provide the power for the movement of the outer bracket 1 and the inner bracket 2; the inner bracket crossbeam 21 is used to connect and fix the inner bracket telescopic legs 22; the inner bracket telescopic legs 22 play a supporting and force-bearing role; the inner bracket limiting slide groove 23 plays a guiding and limiting role for the movement of the outer bracket 1; the inner bracket moving rod 24 connects and fixes the longitudinally distributed inner bracket crossbeams 21; the inner bracket fixing seat 25 is used to fix the inner bracket moving rod 24.

[0021] The second embodiment of the present invention is basically the same as the first embodiment, mainly in that the scheme of the outer bracket is optimized. The outer bracket 1 includes an outer bracket crossbeam 11, an outer bracket telescopic leg 12, an outer bracket limiting slide 13, an outer bracket moving rod 14 and an outer bracket fixing seat 15; the two end surfaces of the outer bracket crossbeam 11 are fixed on the side of the outer bracket telescopic leg 12; the top surface of the outer bracket telescopic leg 12 is fixedly connected to the outer bracket fixing seat 15; the outer bracket crossbeam 11 is mainly used to connect the outer bracket telescopic leg 12; the outer bracket limiting slide 13 guides and limits the inner bracket moving rod 24; the outer bracket telescopic leg 12 supports the entire outer bracket 1; the outer bracket fixing seat 15 is used to fix the outer bracket moving rod 14.

[0022] The outer support fixing seat 15 on the same horizontal line is fixedly connected with the outer support moving rod 14; the outer support moving rod 14 is used to connect and fix the outer support cross beams 11 arranged longitudinally, and move in the inner support limiting sliding groove 23 at the same time.

[0023] The telescopic legs 12 of the outer support include an outer leg fixed shaft 121, an outer leg movable shaft 122 and an outer leg base 123; the outer leg fixed shaft 121 is sleeved with the outer leg movable shaft 122 and is slidably connected to the outer leg movable shaft 122; the telescopic movement of the outer leg movable shaft 122 can adjust the height of the outer support 1 and facilitate its forward and backward movement.

[0024] The end of the outer leg moving shaft 122 is fixedly connected to the outer leg foot 123; the surface of the outer leg moving shaft 122 is provided with an outer leg oil hole 124; the outer leg foot 123 is the contact point for supporting force; the outer leg oil hole 124 is the channel for high-pressure hydraulic oil to enter the hydraulic cylinder inside the outer leg.

[0025] The outer bracket 1 also includes a first mounting frame 16 and a hydraulic pump 17; the first mounting frame 16 is fixedly connected to the outermost outer bracket moving rod 14; the bottom surface of the first mounting frame 16 is fixedly connected to the hydraulic pump 17; the first mounting frame 16 is used to install and fix the hydraulic pump 17; the hydraulic pump 17 is used to provide high-pressure hydraulic oil, which is the medium of hydraulic power.

[0026] The outer bracket 1 also includes a second mounting frame 18, a control rod seat 19 and a control cabinet 110; the second mounting frame 18 is fixedly connected to the other outermost outer bracket moving rod 14; the control rod seat 19 is fixedly connected to one side of the bottom surface of the second mounting frame 18, and the control cabinet 110 is fixedly connected to the other side; the second mounting frame 18 is used to install and fix the control rod seat 19 and the control cabinet 110; the control rod seat 19 is a switch for controlling the walking cylinder 3 and the steering cylinder 111; various electrical components are installed in the control cabinet 110.

[0027] The outer support 1 further comprises a steering cylinder 111 ; the steering cylinder 111 is fixed to the surface of the outer support cross beam 11 through a connecting piece; the telescopic rod of the steering cylinder 111 can be freely telescopic.

[0028] The third embodiment of the present invention is basically the same as the first embodiment, mainly in that it is further optimized. The inner support telescopic leg 22 includes an inner leg fixed shaft 221, an inner leg movable shaft 222 and an inner leg foot 223; the inner leg movable shaft 222 is sleeved in the inner leg fixed shaft 221 and is slidably connected to the inner leg fixed shaft 221; the telescopic movement of the inner leg movable shaft 222 can adjust the height of the inner leg movable shaft 222, so as to facilitate its forward and backward movement.

[0029] The inner leg moving shaft 222 has its moving shaft end fixedly connected to an inner leg foot 223 ; an inner leg oil hole 224 is provided on the surface of the inner leg moving shaft 222 ; the inner leg foot 223 plays a supporting force role; the inner leg oil hole 224 is a channel for high-pressure hydraulic oil to enter and exit the oil cylinder inside the inner leg moving shaft 222 .

[0030] Based on this, a typical working process of the present invention is: When the present invention is implemented, Figure 1-4 As shown, first assemble the various parts of the outer bracket 1 and the inner bracket 2, then use a crane to lift the inner bracket 2 and place it in the outer bracket limiting slide groove 13 on the outer bracket 1, then fix the fixed end of the travel cylinder 3 to the surface of the outer bracket 1, and fix the output shaft end to the surface of the inner bracket 2; during operation, move the control rod seat 19 to drive the outer bracket telescopic legs 12 on the outer bracket 1 to retract until the outer leg foot 123 is separated from the bottom surface by a certain height; move the control rod seat 19 to drive the travel cylinder 3 to extend, which will push the outer bracket moving rod 14 on the outer bracket 1 to move forward along the inner bracket limiting slide groove 23 to a fixed step distance; move the control rod seat 19 to drive the outer bracket telescopic legs 12 to extend until The outer leg foot 123 contacts the bottom surface and raises the outer support 1 to a certain height. During this process, the outer leg moving shaft 122 can be controlled separately to adapt to the uneven ground of the tunnel; the control rod seat 19 is moved to drive the inner support telescopic leg 22 on the inner support 2 to retract until the inner leg foot 223 is off the ground; the control rod seat 19 is moved to drive the travel cylinder 3 to shorten, which will pull the inner support moving rod 24 on the inner support 2 to move forward along the outer support limiting slide groove 13 on the outer support 1 until it reaches the predetermined step distance; the control rod seat 19 is moved to drive the inner support telescopic leg 22 to extend until the inner leg foot 223 contacts the ground, and the cycle is repeated to cover the continuous forward or backward movement of the support.

[0031] When steering is required, the control rod seat 19 is toggled to drive the steering cylinder 111 on the surface of the outer support beam 11, and the telescopic rod of the steering cylinder 111 is extended to abut against the wall surface of the tunnel, and the reverse thrust is used to push the entire shield support to steer.

Claims

1. A step-type shielding bracket, characterized in that: The invention comprises an outer bracket (1), an inner bracket (2) and a travel cylinder (3); the outer bracket (1) and the inner bracket (2) are alternately placed in each other's limiting slide grooves; the fixed end of the travel cylinder (3) is hingedly fixed to the crossbeam surface of the outer bracket (1), and the end of the output shaft is hingedly fixed to the crossbeam surface of the inner bracket (2); the inner bracket (2) comprises an inner bracket crossbeam (21), an inner bracket telescopic leg (22), an inner bracket limiting slide groove (23), an inner bracket moving rod (24) and an inner bracket fixing seat (25); the two end surfaces of the inner bracket crossbeam (21) are fixedly connected to the side of the inner bracket telescopic leg (22), and the inner bracket crossbeam (21) is arranged in parallel; the upper surface of the inner bracket crossbeam (21) arranged in parallel is fixedly connected to the inner bracket fixing seat (25) in an array; the inner bracket moving rod (24) in an array is threadedly connected to the inner bracket fixing seat (25) located on the same horizontal line; the end surface of the inner bracket telescopic leg (22) is fixedly connected to the inner bracket telescopic leg (22).

2. The step-type shielding support according to claim 1, characterized in that: The inner support telescopic leg (22) comprises an inner leg fixed shaft (221), an inner leg movable shaft (222) and an inner leg foot (223); the inner leg movable shaft (222) is sleeved in the inner leg fixed shaft (221) and is slidably connected to the inner leg fixed shaft (221).

3. The step-type shielding support according to claim 2, characterized in that: An inner leg foot (223) is fixedly connected to the inner leg moving shaft (222) at the moving shaft end; an inner leg oil hole (224) is provided on the surface of the inner leg moving shaft (222).

4. The step-type shielding support according to claim 1, characterized in that: The outer support (1) comprises an outer support crossbeam (11), an outer support telescopic leg (12), an outer support limiting slide groove (13), an outer support moving rod (14) and an outer support fixing seat (15); both end surfaces of the outer support crossbeam (11) are fixed to the side surfaces of the outer support telescopic leg (12); and the top end surface of the outer support telescopic leg (12) is fixedly connected to the outer support fixing seat (15).

5. The step-type shielding support as claimed in claim 4, characterized in that: The outer support fixing seat (15) on the same horizontal line is fixedly connected to the outer support moving rod (14).

6. The step-type shielding support according to claim 4, characterized in that: The outer support telescopic leg (12) comprises an outer leg fixed shaft (121), an outer leg movable shaft (122) and an outer leg foot (123); the outer leg fixed shaft (121) is sleeved with the outer leg movable shaft (122) and is slidably connected to the outer leg movable shaft (122).

7. The step-type shielding support according to claim 6, characterized in that: The end of the outer leg moving shaft (122) is fixedly connected to an outer leg foot (123); and an outer leg oil hole (124) is provided on the surface of the outer leg moving shaft (122).

8. The step-type shielding support according to claim 4, characterized in that: The outer bracket (1) further comprises a first mounting frame (16) and a hydraulic pump (17); the first mounting frame (16) is fixedly connected to the outermost outer bracket moving rod (14); and the bottom surface of the first mounting frame (16) is fixedly connected to the hydraulic pump (17).

9. The step-type shielding support according to claim 4, characterized in that: The outer bracket (1) further comprises a second mounting frame (18), a control rod seat (19) and a control cabinet (110); the second mounting frame (18) is fixedly connected to another outermost outer bracket moving rod (14); one side of the bottom surface of the second mounting frame (18) is fixedly connected to the control rod seat (19), and the other side is fixedly connected to the control cabinet (110).

10. The step-type shielding support according to claim 4, characterized in that: The outer bracket (1) further comprises a steering cylinder (111); the steering cylinder (111) is fixed to the surface of the outer bracket crossbeam (11) via a connecting piece.

Images