Adjustable cantilever beam frame and tunneling device

Abstract

The adjustable cantilever beam frame comprises a cantilever beam frame body, a driving unit and a limiting unit, one end of the cantilever beam frame body is rotatably connected to the tunneling device to form a hinged end, the driving unit is configured to drive a suspended end of the cantilever beam frame body to rotate around the hinged end, and a supporting shed is arranged above a cutting part of the tunneling device; the suspended end of the cantilever beam frame body rotates to the side close to the supporting shed, and the cantilever beam frame body is configured to support the supporting shed; the suspended end of the cantilever beam frame body rotates to one side far away from the supporting shed, and the cantilever beam frame body and the cutting part of the tunneling device are staggered; limiting units are arranged on the two sides of the hinged end and located on the rotation path of the cantilever beam frame body. The cantilever beam frame has the advantages that automatic folding and unfolding of the cantilever beam frame body are achieved, it is guaranteed that a supporting shed is supported when the cantilever beam frame body is used, and interference to a tunneling device is avoided when the cantilever beam frame body is not used.

Description

Technical Field

[0001] This utility model relates to the field of coal mine tunneling technology, and in particular to an adjustable cantilever beam frame and tunneling device. Background Technology

[0002] In tunneling support construction, the cantilever beam plays a crucial role as a temporary support and auxiliary installation device for the U-shaped canopy. However, when the tunneling machine is performing cutting operations, the cantilever beam often interferes with the normal operation of the cutting head, thus requiring frequent extension and retraction operations.

[0003] Due to the special working environment of the cantilever beam, which requires high strength and quality, traditional designs are often quite bulky. Traditional cantilever beams, when manually extended and retracted, typically rely on gravity, which presents two main problems: First, during tunneling machine cutting operations, the cantilever beam can interfere with the cutting head's movement, necessitating frequent extension and retraction. Second, the bulky design of traditional cantilever beams, relying on manual extension and retraction using gravity, not only easily leads to collisions with the cutting head's cutting teeth and cutting arm guards, causing equipment damage, increasing maintenance costs and downtime, but also poses a risk of injury due to improper operation, threatening worker safety. Furthermore, manual extension and retraction requires at least two people, resulting in high labor intensity and low efficiency.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to realize the automatic retraction and extension of the cantilever beam body, so as to ensure that the cantilever beam body supports the support shed when in use, and avoids interference with the tunneling device when the cantilever beam body is not in use.

[0006] This utility model solves the above-mentioned technical problems through the following technical means:

[0007] This utility model claims protection for an adjustable cantilever beam frame, including a cantilever beam frame body, a drive unit and a limiting unit. One end of the cantilever beam frame body is connected to the tunneling device to form a hinge end. The drive unit is configured to drive the suspended end of the cantilever beam frame body to rotate around the hinge end. A support shed is provided above the cutting part of the tunneling device.

[0008] The suspended end of the cantilever beam body is rotated to the side closer to the support shed, and the cantilever beam body is configured to support the support shed.

[0009] The suspended end of the cantilever beam body is rotated to the side away from the support shed, and the positions of the cantilever beam body and the cutting part of the tunneling device are staggered from each other;

[0010] Limiting units are set on both sides of the hinge end, and the limiting units are located on the rotation path of the cantilever beam body.

[0011] Preferably, the limiting unit includes a base and a support block. The base is installed on the upper surface of the tunneling device, and the support block is installed on the base. The support block abuts against the surface of the cantilever frame body.

[0012] Preferably, the cantilever frame body includes a crossbeam, a diagonal brace, and a support section. A hinge seat is installed on the upper surface of the tunneling device near the cutting part of the tunneling device. One end of the crossbeam is installed on the hinge seat to form a hinged end. The other end of the crossbeam is connected to one end of the diagonal brace. The other end of the diagonal brace is connected to the support section to form a suspended end of the cantilever frame body. An opening is provided on the upper surface of the support section, and the opening fits with the support shed. The diagonal brace is configured to be inclined towards the support shed in a support state. In the support state, the suspended end of the cantilever frame body rotates to the side closer to the support shed.

[0013] Preferably, the support portion has a U-shaped cross-section structure, with the U-shaped opening forming an opening.

[0014] Preferably, the upper surface of the support block is covered with a shock-absorbing pad.

[0015] Preferably, the drive unit is a swing cylinder.

[0016] This utility model also claims a tunneling device that uses an adjustable cantilever beam frame, characterized in that it includes:

[0017] frame;

[0018] The cutting mechanism is mounted on the frame, and the cutting mechanism is equipped with an adjustable cantilever beam.

[0019] The traveling mechanism is installed below the frame and is configured to drive the frame to produce displacement.

[0020] The rear support mechanism is installed below the frame and is configured to lock the frame. The opening and closing of the rear support mechanism and the drive unit are interlocked.

[0021] The hydraulic system, mounted on the frame, is configured to provide power to the hydraulic subsystems of the rear support mechanism, the travel mechanism, and the cutting mechanism.

[0022] Preferably, the cutting mechanism includes a cutting head and a cutting arm, and a hinge seat is installed on the upper surface of the cutting arm near the cutting head, wherein the cutting head constitutes the cutting part of the tunneling device.

[0023] Preferably, the hydraulic subsystem output circuit of the rear support mechanism is equipped with a directional valve input terminal, wherein there are at least two directional valve output terminals, and the directional valve output terminals are respectively connected to the swing cylinder and the rear support mechanism through oil pipes.

[0024] Preferably, the reversing valve is a two-position six-way rotary valve or at least two three-way ball valves.

[0025] The advantages of this utility model are:

[0026] I. This utility model, by setting up an adjustable cantilever beam frame, allows the cantilever beam frame body to automatically retract and extend. When the tunneling device is working, the suspended end of the cantilever beam frame body rotates to the side closer to the support shed. By supporting the support shed, the cutting part of the tunneling device is separated from the excavated debris. When the tunneling device is not working, the cantilever beam frame body rotates to the side away from the support shed, so that the beam frame body and the cutting part of the tunneling device are staggered, avoiding the cantilever beam frame body from colliding with the cutting part of the tunneling device and causing equipment damage. This ensures effective protection for the cantilever beam frame body when it is working, and also ensures that the cantilever beam frame body does not interfere with the cutting part of the tunneling device when it is retracted.

[0027] On this basis, a limiting unit is also set up. The limiting unit mainly serves to limit the body of the cantilever beam, so that the body of the cantilever beam can be effectively stopped. In addition, it prevents the suspended end of the cantilever beam from colliding with the tunneling device.

[0028] Second, in fact, the shape of the support block will vary depending on the installation position of the base. It can be inclined or horizontal. Preferably, when the support block is in contact with the surface of the cantilever beam body, the surface of the support block can be completely attached to the surface of the cantilever beam body to ensure higher stability of the support. Moreover, based on the lever principle, the support block is preferably combined with the actual shape of the tunneling device, and the distance between the support block and the hinge end should be as large as possible while ensuring that it is feasible.

[0029] Third, generally speaking, the bottom of the most common support sheds on the market is V-shaped or U-shaped. Therefore, the support part is preferably U-shaped cross-section structure to ensure that the support part automatically engages with the support shed and avoids loosening.

[0030] Fourth, this utility model also claims protection for a tunneling device that provides driving force to the swing cylinder through its own hydraulic system. Therefore, it is not necessary to add other driving devices, which ensures the overall compact structure of the tunneling device and avoids increasing the overall load of the tunneling device.

[0031] Based on this, the swing cylinder is specifically connected to the hydraulic subsystem of the rear support mechanism. By adjusting the directional valve, the opening and closing of the rear support mechanism and the drive unit are interlocked. In actual operation, this ensures that the rear support mechanism is in a non-working state when the adjustable cantilever frame is supporting the canopy or during its extension and retraction. This offers three advantages: Advantage 1: It avoids hydraulic circuit conflicts. The interlock ensures that only one system is supplied with hydraulic fluid at a time, preventing insufficient pressure or system failure due to hydraulic energy dispersion. Advantage 2: It avoids mechanical motion conflicts. In actual operation, if both operate simultaneously, it may cause structural interference or mechanical collisions. For example, if the rear support mechanism malfunctions when the cantilever frame body is extended, the interlock mechanism strictly separates their working states through hydraulic circuit switching, avoiding physical conflicts. Advantage 3: It ensures personal safety. During manual operation, accidental activation may cause the rear support mechanism and the cantilever frame body to operate simultaneously. The interlock design, through logical isolation of the hydraulic circuit, forcibly ensures the singularity of operation, reducing the risk of human error. By separating the cantilever beam construction from the rear support mechanism and adding an adjustable cantilever beam with automatic adjustment, the construction process is simplified, the system stability and safety performance are improved, and the efficiency is increased. At the same time, it avoids affecting the operation of the entire tunneling device and extends its service life. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of an adjustable cantilever beam frame according to Embodiment 1 of this utility model;

[0033] Figure 2 This is a structural schematic diagram of the cantilever beam frame body and the limiting unit in Embodiment 1 of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of a tunneling device according to Embodiment 2 of this utility model;

[0035] Figure 4 This is a schematic diagram of the hydraulic system in Embodiment 2 of this utility model.

[0036] 1. Cutting mechanism; 11. Cutting head; 12. Cutting arm; 2. Traveling mechanism; 3. Frame; 4. Hydraulic system; 51. Cantilever frame body; 510. Crossbeam; 511. Diagonal bar; 512. Support unit; 52. Drive unit; 53. Limiting unit; 530. Base; 531. Support block; 532. Vibration damping pad; a. Support canopy; 6. Rear support mechanism; 7. Reversing valve. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] Example 1

[0039] See Figure 1 This embodiment claims protection for an adjustable cantilever beam frame, including a cantilever beam frame body 51, a drive unit 52, and a limiting unit 53. One end of the cantilever beam frame body 51 is connected to the tunneling device to form a hinge end. The drive unit 52 is configured to drive the suspended end of the cantilever beam frame body 51 to rotate around the hinge end. The drive unit 52 is a swing cylinder, preferably with an output torque of 4700 NM, a holding torque of 12000 NM, a radial load of 3600 KG, an axial load of 2700 KG, and a theoretical displacement of 1180 CC. It can drive the cantilever beam frame body 51 to unfold and retract, with an effective stroke of 180°.

[0040] A support canopy a is installed above the cutting section of the tunneling device.

[0041] The suspended end of the cantilever beam body 51 is rotated to the side closer to the support shed a, and the cantilever beam body 51 is configured to support the support shed a.

[0042] The suspended end of the cantilever beam body 51 is rotated to the side away from the support shed a, and the positions of the cantilever beam body 51 and the cutting part of the tunneling device are staggered.

[0043] See Figures 1 to 2 Furthermore, the cantilever frame body 51 includes a crossbeam 510, a diagonal brace 511, and a support section 512. A hinge seat is installed on the upper surface of the tunneling device near the cutting part of the tunneling device. One end of the crossbeam 510 is installed on the hinge seat to form a hinged end, and the other end of the crossbeam 510 is connected to one end of the diagonal brace 511. The other end of the diagonal brace 511 is connected to the support section 512 to form the suspended end of the cantilever frame body 51. An opening is provided on the upper surface of the support section 512, and the opening fits with the support canopy a. The support section 512 has a U-shaped cross-section structure, with the U-shaped opening forming the opening. The diagonal brace 511 is configured to be inclined towards the support canopy a in the support state, and the support state is when the suspended end of the cantilever frame body 51 rotates to the side closer to the support canopy a.

[0044] In actual production, the support section 512 is generally made of one-piece steel plate, using 16mm steel plate. The support section 512 is designed with a width of 180mm, which can accommodate 29U and 36U specifications of support canopy a. In this way, it can ensure that the support canopy a is stable inside the support section 512. Even if the angle of the cutting part of the tunneling device is adjusted arbitrarily, the support canopy a can remain vertical, which provides convenience for the installation of the support canopy a.

[0045] Furthermore, the crossbeam 510 and the diagonal rod 511 can also be integrally formed using 16mm wear-resistant plates, which reduces the overall weight, enhances wear resistance, and extends the service life of the device while ensuring the strength of the device. In addition, the included angle formed between the crossbeam 510 and the diagonal rod 511 is preferably 160°, which allows the support part 512 and the support canopy a to remain vertical and fit together better.

[0046] Generally, the bottom of the most common support shed a is V-shaped or U-shaped. Therefore, the support part 512 is preferably U-shaped cross-section to ensure that the support part 512 automatically engages with the support shed a and avoids loosening.

[0047] Limiting units 53 are provided on both sides of the hinge end, and the limiting units 53 are located on the rotation path of the cantilever beam body 51.

[0048] Furthermore, the limiting unit 53 includes a base 530 and a support block 531. The base 530 is installed on the upper surface of the tunneling device, and the support block 531 is installed on the base 530. The support block 531 abuts against the surface of the cantilever frame body 51. The upper surface of the support block 531 is covered with a shock-absorbing pad 532, which is a 20mm rubber shock-absorbing pad. During the unfolding and retraction of the cantilever frame body 51, the pad effectively buffers the collision with the tunneling device, reducing wear and noise of the tunneling device.

[0049] It is worth noting that the support block 531 on the side away from the support shed a is made of 20mm steel plate, which is used to guide the beam cantilever device during recovery and to prevent the beam adjustment frame from colliding and rubbing against the equipment body.

[0050] In fact, the shape of the support block 531 will vary depending on the installation position of the base 530. It can be inclined or horizontal. Preferably, when the support block 531 is in contact with the surface of the cantilever frame body 51, the surface of the support block 531 can be completely attached to the surface of the cantilever frame body 51 to ensure higher stability of the support. Moreover, based on the lever principle, the support block 531 is preferably combined with the actual shape of the tunneling device, and the distance between the support block 531 and the hinge end is as large as possible while ensuring feasibility.

[0051] This invention utilizes an adjustable cantilever frame. The cantilever frame body 51 automatically retracts and extends, allowing the cantilever frame body 51 to rotate to the side closer to the support shed a when the tunneling device is operating. This supports the support shed a, separating the cutting section of the tunneling device from the excavated debris. When the tunneling device is not operating, the cantilever frame body 51 rotates to the side away from the support shed a, thus offsetting the positions of the cantilever frame body 51 and the cutting section of the tunneling device. This prevents the cantilever frame body 51 from colliding with the cutting section and causing equipment damage. This design effectively protects the cantilever frame body 51 during operation and ensures that it does not interfere with the cutting section of the tunneling device when retracted.

[0052] On this basis, a limiting unit 53 is also set up. The limiting unit 53 mainly serves to limit the body of the cantilever beam frame, so that the cantilever beam frame body 51 can be effectively stopped. In addition, it prevents the suspended end of the cantilever beam frame body 51 from colliding with the tunneling device.

[0053] Example 2

[0054] See Figure 3 This embodiment claims protection for a tunneling device, applying an adjustable cantilever frame as described in Embodiment 1, including a frame 3, a cutting mechanism 1, a traveling mechanism 2, a rear support mechanism 6, and a hydraulic system 4.

[0055] The cutting mechanism 1 is mounted on the frame 3. The cutting mechanism 1 includes a cutting head 11 and a cutting arm 12. A hinge seat is mounted on the upper surface of the cutting arm 12 near the cutting head 11. The cutting head 11 constitutes the cutting part of the tunneling device. The traveling mechanism 2 is mounted below the frame 3 and is configured to drive the frame 3 to produce displacement. The rear support mechanism 6 is mounted below the frame 3 and is configured to lock the frame 3. The opening and closing of the rear support mechanism 6 and the drive unit 52 are interlocked. The hydraulic system 4 is mounted on the frame 3 and is configured to output power to the hydraulic subsystems of the rear support mechanism 6, the hydraulic subsystems of the traveling mechanism 2, and the hydraulic subsystems of the cutting mechanism 1.

[0056] See Figure 4 Furthermore, a directional valve 7 is installed on the output oil line of the hydraulic subsystem from the main hydraulic system 4 to the rear support mechanism 6. The directional valve 7 is a two-position six-way rotary valve or at least two three-way ball valves. The directional valve 7 has at least two output ends, and the output ends of the directional valve 7 are connected to the swing cylinder and the rear support mechanism 6 respectively through oil pipes.

[0057] The process of controlling the swing cylinder by opening and closing the directional valve 7 includes:

[0058] Oil circuit switching procedure: The hydraulic main system 4 provides power to the hydraulic subsystem of the rear support mechanism 6. Preferably, a two-position six-way rotary valve or two three-way ball valves are installed in the load-sensitive multi-way valve A / B oil circuit from the hydraulic main system 4 to the rear support mechanism 6 via a three-way oil pipe. The output ends of the two-position six-way rotary valve or the two three-way ball valves are respectively connected to the swing cylinder and the rear support mechanism 6 via oil pipes. When beam adjustment is required, the two-position six-way rotary valve or the two three-way ball valves are switched to the oil pipe side connected to the swing cylinder, so that the hydraulic oil flows to the swing cylinder.

[0059] Adjustable cantilever beam start-up procedure: Hydraulic oil enters the swing cylinder, driving the cantilever beam body 51 to unfold or retract. After construction is completed, switch the two-position six-way valve back to the rear support mechanism 6, and the rear support mechanism 6 can resume normal operation.

[0060] This embodiment claims to protect a tunneling device that provides driving force to the swing cylinder through its own hydraulic system 4. Therefore, it is not necessary to add other driving devices, which ensures the overall compact structure of the tunneling device and avoids increasing the overall load of the tunneling device.

[0061] Based on this, the swing cylinder is specifically connected to the hydraulic subsystem of the rear support mechanism 6. By adjusting the reversing valve 7, the opening and closing of the rear support mechanism 6 and the drive unit 52 are interlocked. In actual operation, this ensures that the rear support mechanism 6 is in a non-working state when the adjustable cantilever frame is supporting the shed a and during its extension and retraction. This offers three advantages: Advantage 1: It avoids hydraulic circuit conflicts. The interlock ensures that only one system is supplied with hydraulic fluid at a time, preventing insufficient pressure or system failure due to hydraulic energy dispersion. Advantage 2: It avoids mechanical motion conflicts. In actual operation, if both operate simultaneously, it may cause structural interference or mechanical collisions. For example, if the rear support mechanism 6 malfunctions when the cantilever frame body 51 is extended, the interlock mechanism strictly separates their working states through hydraulic circuit switching, avoiding physical conflicts. Advantage 3: It ensures personal safety. During manual operation, accidental activation may cause the rear support mechanism 6 and the cantilever frame body 51 to operate simultaneously. The interlock design, through logical isolation of the hydraulic circuit, forcibly ensures the singularity of operation, reducing the risk of human error. By locking and separating the cantilever beam construction from the rear support mechanism 6, and adding an adjustable cantilever beam with automatic adjustment, the construction process is simplified, the system stability and safety performance are improved, and efficiency is increased. At the same time, it avoids affecting the operation of the entire tunneling device and extends its service life.

[0062] By adopting this embodiment, manpower reduction and efficiency improvement are achieved. The original manual operation of raising and lowering the cantilever beam body 51 is simplified to hydraulic operation of the tunneling device and excavator driver. Each work process reduces at least two operators, thus lowering labor costs. At the same time, the time for installing and lowering the cantilever beam is shortened by at least 5 minutes. Based on the calculation that there are 3 teams in the mine supporting the support shed a, and each shift requires at least 3 beam installation operations, this work saves at least 135 minutes per day. This not only improves construction efficiency but also reduces safety hazards caused by manual operation, resulting in significant economic and social benefits.

[0063] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An adjustable cantilever beam frame, characterized in that, It includes a cantilever frame body (51), a drive unit (52) and a limiting unit (53). One end of the cantilever frame body (51) is connected to the tunneling device to form a hinge end. The drive unit (52) is configured to drive the suspended end of the cantilever frame body (51) to rotate around the hinge end. A support shed (a) is provided above the cutting part of the tunneling device. The suspended end of the cantilever beam body (51) is rotated to the side closer to the support shed (a), and the cantilever beam body (51) is configured to support the support shed (a); The suspended end of the cantilever beam body (51) is rotated to the side away from the support shed (a), and the position of the cantilever beam body (51) and the cutting part of the tunneling device are offset from each other; Limiting units (53) are provided on both sides of the hinge end, and the limiting units (53) are located on the rotation path of the cantilever beam body (51).

2. The adjustable cantilever beam frame according to claim 1, characterized in that, The limiting unit (53) includes a base (530) and a support block (531). The base (530) is installed on the upper surface of the tunneling device, and the support block (531) is installed on the base (530). The support block (531) is in contact with the surface of the cantilever frame body (51).

3. An adjustable cantilever beam frame according to claim 1, characterized in that, The cantilever frame body (51) includes a crossbeam (510), a diagonal rod (511), and a support section (512). A hinge seat is installed on the upper surface of the tunneling device near the cutting part of the tunneling device. One end of the crossbeam (510) is installed on the hinge seat to form a hinge end. The other end of the crossbeam (510) is connected to one end of the diagonal rod (511). The other end of the diagonal rod (511) is connected to the support section (512) to form the suspended end of the cantilever frame body (51). An opening is provided on the upper surface of the support section (512). The opening fits into the support shed (a). The diagonal rod (511) is configured to be inclined towards the support shed (a) in a support state. In the support state, the suspended end of the cantilever frame body (51) rotates to the side closer to the support shed (a).

4. An adjustable cantilever beam frame according to claim 3, characterized in that, The support section (512) has a U-shaped cross-section structure, and the U-shaped opening forms an opening.

5. An adjustable cantilever beam frame according to claim 2, characterized in that, The upper surface of the support block (531) is covered with a shock-absorbing pad (532).

6. An adjustable cantilever beam frame according to claim 1, characterized in that, The drive unit (52) is a swing cylinder.

7. A tunneling device, employing an adjustable cantilever frame as described in any one of claims 1-6, characterized in that, include: rack (3); The cutting mechanism (1) is mounted on the frame (3), and the cutting mechanism (1) is equipped with an adjustable cantilever frame; The traveling mechanism (2) is installed below the frame (3) and is configured to drive the frame (3) to produce displacement. The rear support mechanism (6) is installed below the frame (3). The rear support mechanism (6) is configured to lock the frame (3). The opening and closing of the rear support mechanism (6) and the drive unit (52) are interlocked. The hydraulic system (4) is mounted on the frame (3). The hydraulic system (4) is configured as the power source for the hydraulic subsystem of the rear support mechanism (6), the hydraulic subsystem of the traveling mechanism (2), and the hydraulic subsystem of the cutting mechanism (1).

8. A tunneling device according to claim 7, characterized in that, The cutting mechanism (1) includes a cutting head (11) and a cutting arm (12). A hinge seat is installed on the upper surface of the cutting arm (12) near the cutting head (11). The cutting head (11) constitutes the cutting part of the tunneling device.

9. A tunneling device according to claim 7, characterized in that, The hydraulic subsystem output oil circuit of the rear support mechanism (6) is equipped with the input end of the reversing valve (7), wherein there are at least two output ends of the reversing valve (7), and the output ends of the reversing valve (7) are connected to the swing cylinder and the rear support mechanism (6) respectively through oil pipes.

10. A tunneling device according to claim 9, characterized in that, The reversing valve (7) is a two-position six-way rotary valve or at least two three-way ball valves.

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