Machine-mounted forepoling bar temporary supporting device suitable for different sections

Abstract

The onboard forepoling bar temporary supporting device suitable for the different sections comprises a protection assembly and a side protection assembly, and the side protection assembly comprises a side protection plate and a third telescopic oil cylinder; the protection assembly comprises a cross beam which is horizontally arranged and is perpendicular to the advancing direction of the front end of the roadheader, and a first telescopic oil cylinder of which one end is fixedly connected with the cross beam through a first connecting assembly and the other end is fixedly connected with the front end of the roadheader through a tray and a screw; the first forepoling bar is parallel to the advancing direction of the front end of the roadheader and is in sliding connection with the cross beam through a second connecting assembly; the head-on plate is vertically arranged, perpendicular to the advancing direction of the front end of the roadheader and hinged to the first forepoling bar; and the second forepoling bar is parallel to the first forepoling bar and hinged to the cross beam through a third connecting assembly capable of adjusting the distance between the second forepoling bar and the top of the roadway. A plurality of forepoling bars are arranged to support the top plate, and can adapt to various tunnel section shapes such as rectangle and arch.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mine temporary support, especially to an airborne front probe beam temporary support device suitable for different sections. BACKGROUND

[0002] Temporary support refers to the support structure temporarily set to ensure the stability of the roadway and the safety of the construction personnel during the mining process, which is not yet set up permanent support after the first excavation is completed. Its main function is to support the roof and prevent roof fall. Modern temporary support technology emphasizes rapid installation, adjustability and durability, thereby ensuring the safety of construction personnel and improving the efficiency of excavation.

[0003] Most current airborne temporary support equipment uses rectangular or arched protective plates to support the roof. However, the existing temporary support device can only adapt to a single shape section, and the actual support effect is not ideal when facing different shapes of sections. In addition, the protective plate support device is more complex than the front probe beam support device, and transportation and replacement are more difficult.

[0004] Chinese utility model patent: announcement number "CN218953341U", name "a machine-mounted temporary support device of a heading machine", discloses a machine-mounted temporary support device of a heading machine, which uses a hollow support frame to support the roof. However, for arched section roadway, the passive support effect provided by the hollow support frame is not ideal, the support frame is more complex to install, and it is difficult to control the two sides of the roadway, there is a risk of roadway spalling.

[0005] Chinese utility model patent: announcement number "CN219826875U", name "a temporary support device suitable for arch-shaped roadway excavation", discloses a temporary support device suitable for arch-shaped roadway excavation, which is arranged at one end of the machine-mounted front probe beam support near the top of the roadway, comprising: an arch-shaped assembly, a front probe assembly and a first side turning assembly, the arch-shaped assembly is provided with the same camber as the top of the roadway; the front probe assembly is fixedly connected in the gravity direction of the arch-shaped assembly, and the first side turning assembly is arranged at the two ends of the arch-shaped assembly in a back-to-back manner, and the first side turning assembly is rotatably connected with the arch-shaped assembly. The two ends of the arch-shaped assembly are respectively provided with the first side turning assembly, and the front probe assembly is fixedly connected in the gravity direction of the arch-shaped assembly, after the arch-shaped assembly supports the top of the roadway, the first side turning assembly rotates towards the direction of the top of the roadway, by rotating the first side turning assembly, manual rotation is reduced, working time is reduced, and working efficiency is improved, at the same time, rotating the first side turning assembly increases the supporting area, and solves the problem of insufficient supporting area. However, the two sides and the head of the technical scheme are passively supported, the supporting effect is not as good as that of active support, the welding connection may cause stress concentration at the joint, and the strength of the heat affected zone is reduced, which increases the risk of structure failure under high load or earthquake conditions, the design does not consider the influence of the shape of the roadway cross section (such as circular, rectangular, etc.) and different geological types (such as soft rock, hard rock) on the supporting system, which limits the use of the device in different roadway conditions, the temporary support device is relatively complex, and complex process and tools are required during installation, and it may take time and effort to disassemble, thereby affecting the construction progress and construction period. Content of the utility model

[0006] In order to solve the problems of poor adaptability of the machine-mounted temporary support support device to different cross-section shape roadways, and the inability to effectively protect the head and side in the prior art. The utility model provides a machine-mounted front probe beam temporary support device suitable for different cross sections, aiming to enhance the safety of underground operation, improve the speed and efficiency of excavation operation, and reduce the labor intensity of workers, thereby bringing comprehensive optimization and improvement to underground excavation construction.

[0007] The utility model discloses a through following technical schemes realizes: including protection subassembly and protecting the help component, protection subassembly sets up at the top and the front of the front end of the comprehensive digging machine, and the help component sets up at the both sides of the front end of the comprehensive digging machine, the help component includes the help board that sets up parallel to the direction of travel of the front end of the comprehensive digging machine and the third telescopic oil cylinder that one end is hinged with the help board and the other end is fixedly connected with the front end of the comprehensive digging machine through the tray and screw, the protection subassembly includes the crossbeam that sets up horizontally and is perpendicular to the direction of travel of the front end of the comprehensive digging machine, the first telescopic oil cylinder that one end is fixedly connected with the crossbeam through the first connecting component and the other end is fixedly connected with the front end of the comprehensive digging machine through the tray and screw, the first front probe beam that sets up parallel to the direction of travel of the front end of the comprehensive digging machine and is slidably connected with the crossbeam through the second connecting component, the head-on board that sets up vertically and is perpendicular to the direction of travel of the front end of the comprehensive digging machine and is hinged with the first front probe beam and the second front probe beam that sets up parallel with the first front probe beam and is hinged with the crossbeam through the third connecting component, the third connecting component can adjust the distance between the second front probe beam and the roof of the roadway, and a certain pressure is applied to the second front probe beam.

[0008] As further preferred, a second telescopic oil cylinder is further arranged between the head-on board and the crossbeam, one end of the second telescopic oil cylinder is hinged with the crossbeam, and one end is hinged with the head-on board.

[0009] As further preferred, the second telescopic oil cylinder is hinged with the middle part of the head-on board in the vertical direction.

[0010] As further preferred, a ring sleeve is arranged between the head-on board and the second telescopic oil cylinder.

[0011] As further preferred, the first connecting component comprises a fixed steel plate hinged with the first telescopic oil cylinder through a first fastening bolt, a tensile spring support fixedly connected with the fixed steel plate through a tray and a screw at one end and fixedly connected with the crossbeam through a high-strength bolt at the other end.

[0012] As further preferred, the first connecting component further comprises a lateral support obliquely arranged and riveted with the fixed steel plate and the crossbeam at both ends.

[0013] As further preferred, the second connecting component comprises a pipe clamp, a rectangular connecting plate, a fastening screw, a second fastening nut and a second fastening bolt, the pipe clamp is sleeved on the first front probe beam, a fastening hole is formed in the pipe clamp, the second fastening bolt is arranged in the fastening hole, the second fastening bolt and the second fastening nut are threadedly connected, the rectangular connecting plate is arranged between the pipe clamp and the crossbeam, and the second connecting component is fixed on the crossbeam through the fastening screw.

[0014] As a further preferred, the third connecting assembly comprises a small jack and a hinged jacket, the small jack is arranged between the hinged jacket and the crossbeam, the hinged jacket is sleeved on the second front probe beam, and the third connecting assembly comprises a U-shaped connecting plate and a connecting shaft, the U-shaped connecting plate is sleeved on the second front probe beam, one end of the small jack is arranged in the U-shaped groove of the U-shaped connecting plate, and the connecting shaft is arranged in the connecting hole of the U-shaped connecting plate and the connecting hole of the small jack.

[0015] As a further preferred, the number of the first front probe beams is two, which are symmetrically arranged relative to the advancing direction of the front end of the fully-mechanized coal mining machine and close to the rib support assembly, the number of the second front probe beams is two, and the number of the rib support assemblies is two, which are symmetrically arranged relative to the advancing direction of the front end of the fully-mechanized coal mining machine.

[0016] As a further preferred, the crossbeam is a steel structure beam which is composed of a middle support body and upper and lower pressure bearing plates, the support body and the pressure bearing plates are connected together through welding, the inside of the support body is a honeycomb structure, the first front probe beam and the second front probe beam are both 4m long 3-inch steel pipes, and the rib support plates and the head-on plates are both formed by welding of I-shaped steel and steel mesh.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1. The utility model uses a plurality of front probe beams to replace the protective plates to support the roadway roof, simplifies the temporary support device, optimizes equipment transportation and installation, and reduces the labor intensity of construction personnel.

[0019] 2. The utility model sets up a plurality of front probe beams to support the roof, can adapt to various roadway section shapes such as rectangle and arch, when the roadway section is rectangular, the small jack does not need to exert a supporting force, simplifies the construction process, saves time and labor cost, effectively reduces the labor intensity of workers, and improves the speed and efficiency of tunneling operation.

[0020] 3. The utility model is integrated with the tunneling machine, can be retracted after support is completed, advances with the tunneling machine, and saves the time of disassembly and movement. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic view of the overall structure of the utility model.

[0022] Figure 2 It is a side view of the utility model.

[0023] Figure 3 It is Figure 1 It is a local enlarged view of the middle A.

[0024] Figure 4 For Figure 1 Local enlarged view at B.

[0025] Indicated in the figure:

[0026] 1, the front end of the fully mechanized mining machine; 2, the protection assembly; 3, the support assembly; 21, the first front probe beam; 22, the second front probe beam; 23, the head-on plate; 24, the first telescopic oil cylinder; 25, the cross beam; 26, the second telescopic oil cylinder; 27, the first connecting assembly; 28, the second connecting assembly; 29, the third connecting assembly; 31, the support plate; 32, the third telescopic oil cylinder; 261, the ring sleeve; 271, the tension spring support; 272, the lateral support; 273, the fixed steel plate; 274, the first fastening bolt; 281, the pipe clamp; 282, the rectangular connecting plate; 283, the fastening screw; 284, the second fastening nut; 285, the second fastening bolt; 291, the small jack; 292, the articulated clamp; 2921, the U-shaped connecting plate; 2922, the connecting shaft. DETAILED DESCRIPTION

[0027] The advantages and characteristics of the present application will be illustrated and explained by means of the non-limiting description of preferred embodiments, given by way of example only with reference to the accompanying drawings.

[0028] As Figure 1 shown, the utility model provides a kind of on-board front probe beam temporary support device suitable for different sections, including protection assembly 2 and support assembly 3.The protection assembly 2 is set in the top and front of the front end 1 of fully mechanized mining machine, and support assembly 3 is set in both sides of the front end 1 of fully mechanized mining machine.The number of support assembly 3 is two, and it is symmetrically set relative to the direction of travel of the front end 1 of fully mechanized mining machine.

[0029] Support assembly 3 includes support plate 31 and third telescopic oil cylinder 32, support plate 31 is set parallel to the direction of travel of the front end 1 of fully mechanized mining machine, and the plate surface of support plate 31 can be vertical also can be at a certain angle with vertical surface, for protecting both sides of the front end 1 of fully mechanized mining machine, it can be passive protection also can be actively protected under the control of third telescopic oil cylinder 32.The third telescopic oil cylinder 32 is hinged with support plate 31 at one end, and is fixedly connected with the front end 1 of fully mechanized mining machine through tray and screw at the other end, for actively controlling support plate 31 to approach the side wall of roadway and actively protecting.

[0030] The protection assembly 2 comprises a first front probe beam 21, a second front probe beam 22, a head-on plate 23, a first telescopic oil cylinder 24, a cross beam 25, a second telescopic oil cylinder 26, a first connecting assembly 27, a second connecting assembly 28 and a third connecting assembly 29. The cross beam 25 is horizontally arranged and perpendicular to the advancing direction of the front end 1 of the shearer, and the cross beam 25 is fixedly connected with the front end 1 of the shearer through the first telescopic oil cylinder 24. One end of the first telescopic oil cylinder 24 is fixedly connected with the cross beam 25 through the first connecting assembly 27, and the other end is fixedly connected with the front end 1 of the shearer through a tray and a screw. The first front probe beam 21 is arranged parallel to the advancing direction of the front end 1 of the shearer, and is slidingly connected with the cross beam 25 through the second connecting assembly 28. One end of the first front probe beam 21 is hingedly connected with the head-on plate 23. The head-on plate 23 is vertically arranged and perpendicular to the advancing direction of the front end 1 of the shearer, and is used for protecting the front part of the front end 1 of the shearer. The head-on plate 23 can adjust the distance between the head-on plate 23 and the front end 1 of the shearer by sliding of the first front probe beam 21 on the cross beam 25, so as to actively protect. As preferred, the number of the first front probe beams 21 is two, which are symmetrically arranged relative to the advancing direction of the front end 1 of the shearer and close to the rib support assembly 3. The second front probe beam 22 is hingedly connected with the cross beam 25 through the third connecting assembly 29. The third connecting assembly 29 can adjust the distance between the second front probe beam 22 and the roof of the roadway, and apply a certain pressure to the second front probe beam 22, so that the second front probe beam 22 can support the roof of the roadway, thereby protecting the top of the front end 1 of the shearer. The second front probe beam 22 is arranged in parallel with the first front probe beam 21, and the number of the second front probe beams 22 can be several, preferably two.

[0031] As shown in Figure 2 In order to enable the head-on plate 23 to be folded and stored when not working, thereby saving space, a second telescopic oil cylinder 26 is further arranged between the head-on plate 23 and the cross beam 25. One end of the second telescopic oil cylinder 26 is hingedly connected with the cross beam 25, and the other end is hingedly connected with the head-on plate 23. In order to save the force arm and reduce energy consumption, the second telescopic oil cylinder 26 is hingedly connected with the middle part of the head-on plate 23 in the vertical direction. In order to enable the head-on plate 23 to move more smoothly under the action of the second telescopic oil cylinder 26, a ring sleeve 261 is arranged between the head-on plate 23 and the second telescopic oil cylinder 26.

[0032] As shown in Figure 3As shown, the first connecting assembly 27 includes a tension spring strut 271, a lateral strut 272, a fixed steel plate 273 and a first fastening bolt 274. One end of the tension spring strut 271 is fixedly connected with the fixed steel plate 273 through a tray and a screw, and the other end is fixedly connected with the crossbeam 25 through a high-strength bolt. The lateral strut 272 is obliquely arranged, and two ends thereof are respectively rivetedly connected with the fixed steel plate 273 and the crossbeam 25, and the fixed steel plate 273 and the crossbeam 25 form a triangle with the lateral strut 272, which plays a role of reinforcing and improving the stability of the first connecting assembly 27 as a whole. The fixed steel plate 273 is hingedly connected with the first telescopic oil cylinder 24 through the first fastening bolt 274.

[0033] As shown in Figure 4 As shown, the second connecting assembly 28 includes a pipe clamp 281, a rectangular connecting plate 282, a fastening screw 283, a second fastening nut 284 and a second fastening bolt 285. The pipe clamp 281 is sleeved on the first front probe beam 21, and a fastening hole is formed in the pipe clamp 281. The second fastening bolt 285 is arranged in the fastening hole, and the second fastening bolt 285 and the second fastening nut 284 are threadedly connected. When the second fastening nut 284 is tightened, the first front probe beam 21 can be fixed, and when the second fastening nut 284 is loosened, the first front probe beam 21 can be moved, so that the position of the first front probe beam 21 can be adjusted. The rectangular connecting plate 282 is arranged between the pipe clamp 281 and the crossbeam 25, and the second connecting assembly 28 is fixed on the crossbeam 25 through the fastening screw 283. The third connecting assembly 29 includes a small jack 291 and a hinged clamp sleeve 292. The small jack 291 is arranged between the hinged clamp sleeve 292 and the crossbeam 25, and is used for jacking up the second front probe beam 22 and giving the second front probe beam 22 a certain pressure. The hinged clamp sleeve 292 is sleeved on the second front probe beam 22 and includes a U-shaped connecting plate 2921 and a connecting shaft 2922. The U-shaped connecting plate 2921 is sleeved on the second front probe beam 22. One end of the small jack 291 is arranged in a U-shaped groove of the U-shaped connecting plate 2921, and the connecting shaft 2922 is arranged in a connecting hole of the U-shaped connecting plate 2921 and a connecting hole of the small jack 291, so as to realize the fixed connection of the small jack 291 and the second front probe beam 22. The small jack 291 is fixedly connected with the crossbeam 25 through a tray and a fixed screw.

[0034] It should be added that in this embodiment, the cross beam 25 is a steel structure beam composed of a middle support body and upper and lower pressure plates, the support body and the pressure plates are connected together by welding, the inside of the support body is a honeycomb structure, which is reasonable in design and high in strength and not easy to bend laterally. In addition, the first front probe beam 21 and the second front probe beam 22 are both 4m long 3-inch steel pipes, the guard plate 31 and the head plate 23 are welded together by using I-beams and steel mesh, which has high strength and good support effect, and there is a certain difference in size specification between the two. When the fully mechanized mining machine is cutting, the head plate 23 is folded towards the front end 1 of the fully mechanized mining machine and shrinks with the second telescopic oil cylinder 26. The guard plate 31 shrinks with the third telescopic oil cylinder 32, and then the fully mechanized mining machine performs the tunneling operation. After the fully mechanized mining machine completes the cutting operation, the cutting head is lowered, the working face is knocked and the metal mesh is placed on the temporary support roof beam and tightened, then the head plate 23 and the guard plate 31 are erected and reach a certain supporting force, the support personnel enters the bottom of the temporary support to perform permanent support, and after the support operation is completed, it is withdrawn and the tunneling operation is continued.

[0035] The implementation principle of the embodiment of the utility model is that a plurality of first front probe beams 21 and second front probe beams 22 are arranged to support the roof, which can adapt to various roadway section shapes such as rectangular and arched shapes, when the roadway section is rectangular, the small jack 291 does not need to exert a supporting force, which simplifies the construction process and saves time and labor cost, effectively reduces the labor intensity of workers, and improves the speed and efficiency of the tunneling operation. When the roadway section shape is semicircular arched, the small jack 291 arranged on the second front probe beam 22 makes it rise, providing a certain supporting force for the support of the arched roadway top, which can convert passive support into active support, thereby significantly improving the stability and safety of the roadway. Through the support of the first front probe beam 21 and the second front probe beam 22 to the top of the roadway, the head plate 23 and the guard plate 31 are added to support the head and two sides of the roadway, which significantly improves the support effect of the roadway and brings comprehensive optimization and improvement to the underground tunneling construction.

[0036] In addition to the above embodiments, the utility model can also have other implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. An on-board forepoling temporary support device adapted to different cross sections, comprising a shield assembly (2) and a breast assembly (3), characterized in that: The protection assembly (2) is arranged on the top and front of the front end (1) of the fully-mechanized coal mining machine, the rib protection assembly (3) is arranged on both sides of the front end (1) of the fully-mechanized coal mining machine, the rib protection assembly (3) comprises a rib protection plate (31) arranged in parallel to the running direction of the front end (1) of the fully-mechanized coal mining machine and a third telescopic oil cylinder (32) having one end hinged to the rib protection plate (31) and the other end fixedly connected to the front end (1) of the fully-mechanized coal mining machine through a tray and a screw; the protection assembly (2) comprises a crossbeam (25) arranged horizontally and perpendicularly to the running direction of the front end (1) of the fully-mechanized coal mining machine, a first telescopic oil cylinder (24) having one end fixedly connected to the crossbeam (25) through a first connecting assembly (27) and the other end fixedly connected to the front end (1) of the fully-mechanized coal mining machine through a tray and a screw, a first front probe beam (21) arranged in parallel to the running direction of the front end (1) of the fully-mechanized coal mining machine and slidably connected to the crossbeam (25) through a second connecting assembly (28), a head-on plate (23) arranged vertically and perpendicularly to the running direction of the front end (1) of the fully-mechanized coal mining machine and hinged to the first front probe beam (21), and a second front probe beam (22) arranged in parallel to the first front probe beam (21) and hinged to the crossbeam (25) through a third connecting assembly (29), the third connecting assembly (29) being capable of adjusting the distance between the second front probe beam (22) and the roof of the roadway and exerting a certain pressure on the second front probe beam (22).

2. The self-adapting different section on-board forepoling temporary support device according to claim 1, characterized in that: The second telescopic oil cylinder (26) is hinged to the crossbeam (25) at one end and to the head-on plate (23) at the other end.

3. The self-adepting to different section roofbolting support device according to claim 2, characterized in that: The second telescopic oil cylinder (26) is hinged to the middle of the head-on plate (23) in the vertical direction.

4. The self-adapting different section forepoling temporary support device of claim 2, wherein: A ring sleeve (261) is arranged between the head-on plate (23) and the second telescopic oil cylinder (26).

5. The self-adapting different section forepoling temporary support device of claim 1, wherein: The first connecting assembly (27) comprises a fixed steel plate (273) hinged to the first telescopic oil cylinder (24) through a first fastening bolt (274), and a tensile spring support (271) fixedly connected to the fixed steel plate (273) at one end and fixedly connected to the crossbeam (25) at the other end through a high-strength bolt.

6. The self-adapting different section of the machine-mounted forepoling temporary support device according to claim 5, characterized in that: The first connecting assembly (27) further comprises a lateral support (272) arranged obliquely and riveted to the fixed steel plate (273) and the crossbeam (25) at two ends, respectively.

7. The self-adapting different section of the machine-mounted forepoling temporary support device according to claim 1, characterized in that: The second connecting assembly (28) comprises a pipe clamp (281), a rectangular connecting plate (282), a fastening screw (283), a second fastening nut (284) and a second fastening bolt (285), the pipe clamp (281) is sleeved on the first front probe beam (21), the pipe clamp (281) is provided with a fastening hole, the second fastening bolt (285) is arranged in the fastening hole, the second fastening bolt (285) and the second fastening nut (284) are threadedly connected, the rectangular connecting plate (282) is arranged between the pipe clamp (281) and the crossbeam (25), and the second connecting assembly (28) is fixed on the crossbeam (25) through the fastening screw (283).

8. The self-adapting different section of the machine-mounted forepoling temporary support device according to claim 1, characterized in that: The third connecting assembly (29) comprises a small jack (291) and a hinged jacket (292), the small jack (291) is arranged between the hinged jacket (292) and the cross beam (25), the hinged jacket (292) is sleeved on the second front probe beam (22) and comprises a U-shaped connecting plate (2921) and a connecting shaft (2922), the U-shaped connecting plate (2921) is sleeved on the second front probe beam (22), one end of the small jack (291) is arranged in the U-shaped groove of the U-shaped connecting plate (2921), and the connecting shaft (2922) is arranged in the connecting hole of the U-shaped connecting plate (2921) and the connecting hole of the small jack (291).

9. The jumbo-mounted forepoling temporary support device for different sections according to any one of claims 1 to 8, characterized in that: The first front probe beam (21) is two in number and is symmetrically arranged relative to the advancing direction of the front end (1) of the fully-mechanized coal mining machine and is close to the side protection assembly (3), the second front probe beam (22) is two in number, and the side protection assembly (3) is two in number and is symmetrically arranged relative to the advancing direction of the front end (1) of the fully-mechanized coal mining machine.

10. The jumbo-mounted forepoling temporary support device for different sections according to any one of claims 1 to 8, characterized in that: The cross beam (25) is a steel structure beam and is composed of a middle support body and upper and lower pressure bearing plates, the support body and the pressure bearing plates are connected together through welding, the inside of the support body is a honeycomb structure, the first front probe beam (21) and the second front probe beam (22) are both 4m long 3-inch steel pipes, and the side protection plate (31) and the head-on plate (23) are both formed by welding of I-shaped steel and steel mesh.

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