A welding device for tunnel construction

Abstract

The present invention belongs to the field of welding technology, and in particular relates to a welding device for tunnel construction, including a base and a sleeve support fixedly arranged on the top of the base, and further comprising: a cylinder fixedly arranged on one side of the top of the base, the moving end of the cylinder is fixedly provided with an L-shaped bracket, and the top of the L-shaped bracket is fixedly provided with a reinforcing bar anchor feeding pipe extending downward; an electromagnetic positioning mechanism arranged inside the reinforcing bar anchor feeding pipe, and the electromagnetic positioning mechanism is used for clamping and positioning the reinforcing bar anchors inside the reinforcing bar anchor feeding pipe; a rotary welding mechanism. The present invention accurately positions the reinforcing bar anchors through the electromagnetic positioning mechanism, and realizes efficient and comprehensive welding in cooperation with the rotary welding mechanism. At the same time, the sleeve turning mechanism realizes convenient turning of the sleeve by means of motor drive for multi-position welding, which not only improves the welding accuracy and quality, ensures the sleeve quality, but also reduces the labor intensity, improves the production efficiency, and meets the diverse requirements for the production of monitoring measurement marks.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding, and in particular relates to a welding device for tunnel construction. Background Art

[0002] In tunnel construction, the New Austrian Tunneling Method is widely used. It is necessary to ensure the stability of the surrounding rock through displacement monitoring. Monitoring and measurement is the core of the New Austrian Tunneling Method, which is of great significance for ensuring construction quality and safety. Currently, non-contact measurement is mostly used for tunnel monitoring and measurement, relying on a large number of monitoring and measurement markers. The monitoring and measurement markers generally consist of a measurement marker head, a sleeve, and anchor fittings, etc.

[0003] When manufacturing the monitoring and measurement marker, it is required that the anchor reinforcement be welded to the sleeve of the measurement marker head. For example, in the publication number: CN215880463U, an auxiliary device for processing a monitoring and measurement marker is disclosed. In this solution, it is proposed that "when manufacturing the monitoring and measurement marker, the anchor reinforcement is welded in the middle of the measurement marker head, and the measurement marker head and the anchor reinforcement should be perpendicular". However, in actual manufacturing, welders often align the anchor reinforcement and weld it to the sleeve of the measurement marker head. During the welding process, the anchor reinforcement is prone to deviation, which is time-consuming and laborious. Moreover, during the welding process, the contact part between the anchor reinforcement and the sleeve of the measurement marker head cannot be fully welded, resulting in poor welding quality, affecting the stable installation effect, and it is difficult to meet the high-precision and high-efficiency requirements for manufacturing the monitoring and measurement marker.

[0004] Therefore, a welding device for tunnel construction is proposed. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems and provide a welding device for tunnel construction.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A welding device for tunnel construction includes a base and a sleeve support fixedly arranged on the top of the base, and further includes:

[0007] A cylinder, fixedly arranged on one side of the top of the base, the moving end of the cylinder is fixedly provided with an L-shaped bracket, and the top of the L-shaped bracket is fixedly provided with a downward-extending steel bar anchor fitting feeding pipe;

[0008] An electromagnetic positioning mechanism, arranged inside the steel bar anchor fitting feeding pipe, and the electromagnetic positioning mechanism is used to clamp and position the steel bar anchor fittings inside the steel bar anchor fitting feeding pipe;

[0009] A rotary welding mechanism, arranged at the lower end of the pipe wall of the steel bar anchor fitting feeding pipe, and the rotary welding mechanism is used to rotarily weld the connection between the steel bar anchor fitting and the sleeve;

[0010] A sleeve flipping mechanism, arranged at one end of the L-shaped bracket, and the sleeve flipping mechanism is used in cooperation with the sleeve support;

[0011] A PLC controller is fixedly arranged on the side wall of the sleeve bracket, and the cylinder, electromagnetic positioning mechanism, rotary welding mechanism and sleeve turning mechanism are all electrically connected to the PLC controller.

[0012] Preferably, the electromagnetic positioning mechanism includes an annular mounting groove arranged on the inner wall of the steel bar anchor feeding tube, an arc-shaped positioning plate is symmetrically provided inside the annular mounting groove, two telescopic rods are symmetrically fixed between the side walls of the two arc-shaped positioning plates and the side walls of the annular mounting groove, the rod walls of the two telescopic rods are both sleeved with a first spring, and the two ends of the first spring are respectively fixedly connected to the arc-shaped positioning plate and the annular mounting groove, electromagnetic blocks are fixed on both sides of the annular mounting groove, and permanent magnet blocks corresponding to the positions of the electromagnetic blocks are fixed on the side walls of the two arc-shaped positioning plates.

[0013] Preferably, an infrared emitter and an infrared receiver are symmetrically fixed on the side wall of the annular mounting groove, and the infrared emitter and the infrared receiver are located between the two arc-shaped positioning plates.

[0014] Preferably, the rotary welding mechanism includes a circular shell fixedly arranged on the outer wall of the steel bar anchor feeding tube, a first motor is fixedly arranged on the top side of the circular shell, the output shaft of the first motor extends to the interior of the circular shell and is fixedly provided with a gear, a gear ring is provided inside the circular shell, and the inner wall of the gear ring is rotatably connected to the outer wall of the steel bar anchor feeding tube through a bearing, the gear is meshed with the gear ring, a mounting plate is fixedly arranged on the bottom side of the gear ring, and a welding gun with a self-contained welding wire is fixedly arranged on the side of the mounting plate.

[0015] Preferably, the sleeve flipping mechanism includes a fixed plate fixedly arranged on one end of the L-shaped bracket, an elastic rod is fixedly provided on the lower surface of the fixed plate, and a sleeve pressure seat is fixedly provided at the lower end of the elastic rod, the sleeve pressure seat adopts a hollow structure, and a rubber pressure roller is symmetrically rotated inside the sleeve pressure seat, the roller walls of the two rubber pressure rollers extend to the outside of the sleeve pressure seat, and one end of the two rubber pressure rollers extends outward and is fixed with a sprocket, the two sprockets are meshed with the same chain, the side wall of the sleeve pressure seat is fixed with an isolation cover that covers the sprocket and the chain, the side wall of the isolation cover is fixed with a second motor, and the output end of the second motor is fixedly connected to one end of one of the rubber pressure rollers, and the second motor is a self-locking motor.

[0016] Preferably, the elastic rod includes an outer tube fixedly arranged on the lower surface of the fixed plate, an inner rod is provided inside the outer tube, a second spring is fixed between the upper end of the inner rod and the inner wall of the outer tube, and the lower end of the inner rod is fixedly connected to the top of the sleeve pressure seat.

[0017] Preferably, a limiting rod is fixedly provided on one side of the rod wall of the inner rod, and a limiting opening that cooperates with the limiting rod is opened on the tube wall of the outer tube.

[0018] Preferably, the top of the sleeve support and the bottom of the sleeve pressure seat are both provided with arc-shaped placement grooves.

[0019] Compared with the existing technology, the beneficial effects of the present invention are:

[0020] 1. Through the provision of a steel bar anchor feeding pipe and an electromagnetic positioning mechanism provided inside the steel bar anchor feeding pipe, the position of the steel bar anchor is detected with the help of an infrared transmitter and an infrared receiver. Combined with the magnetic repulsion between the electromagnetic block and the permanent magnet block, the steel bar anchor can be clamped and positioned accurately and quickly, thus avoiding the problem of the steel bar anchor running off during welding, ensuring accurate welding position, improving welding accuracy, and laying the foundation for high-quality welding.

[0021] 2. Through the rotary welding mechanism, the rotary welding mechanism uses the first motor to drive the gear and gear ring to rotate, so that the welding wire welding gun surrounds the contact part of the steel anchor and the casing for welding, and the PLC controller accurately controls the motor to rotate 360 degrees in both forward and reverse directions to achieve two-way surrounding welding, fully covering the welding part, effectively improving the welding efficiency, while ensuring the welding integrity, improving the welding quality, and enhancing the stability of the monitoring and measurement mark after installation.

[0022] 3. The casing flipping mechanism and the elastic rod arranged on the top of the casing flipping mechanism can effectively buffer the external force when clamping the casing, prevent the casing pressure seat and the casing support seat from applying excessive extrusion pressure on the casing, avoid the casing from being damaged due to excessive force, and ensure the quality and performance of the casing; at the same time, the casing flipping mechanism drives the rubber pressure roller through the second motor, and uses the sprocket and chain to realize the synchronous rotation of the two rubber pressure rollers, driving the casing to rotate and flip over in the casing support seat, which is convenient for welding other positions of the casing, and can weld multiple steel anchors on the casing to meet the diverse needs of monitoring and measurement mark production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of a welding device for tunnel construction provided by the present invention;

[0024] Figure 2 This is a side view of a welding device for tunnel construction provided by the present invention;

[0025] Figure 3 This is a three-dimensional view of a cutaway feed pipe of a steel bar anchor piece of a welding device for tunnel construction provided by the present invention;

[0026] Figure 4This is a three-dimensional diagram of the connection between an L-shaped bracket, a steel bar anchor feed pipe, and a rotary welding mechanism of a tunnel construction welding device provided by the present invention;

[0027] Figure 5 This is a three-dimensional diagram of a casing turning mechanism of a welding device for tunnel construction provided by the present invention;

[0028] Figure 6 The present invention provides a three-dimensional view of a casing pressure seat in a casing turning mechanism of a welding device for tunnel construction after being cut open.

[0029] In the figure: 1 base, 2 sleeve support, 3 cylinder, 4 L-shaped bracket, 5 steel anchor feeding pipe, 6 electromagnetic positioning mechanism, 61 annular mounting groove, 62 arc-shaped positioning plate, 63 telescopic rod, 64 first spring, 65 electromagnetic block, 66 permanent magnet block, 67 infrared transmitter, 68 infrared receiver, 7 rotary welding mechanism, 71 circular shell, 72 first motor, 73 gear, 74 ring gear, 75 mounting plate, 76 welding gun with built-in welding wire, 8 sleeve turning mechanism, 81 fixing plate, 82 elastic rod, 821 outer tube, 822 inner rod, 823 second spring, 824 limit rod, 83 sleeve pressure seat, 84 rubber pressure roller, 85 sprocket, 86 chain, 87 isolation cover, 88 second motor, 9 PLC controller, 10 arc-shaped placement groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0031] like Figures 1-6 As shown, a welding device for tunnel construction includes a base 1 and a sleeve bracket 2 fixedly arranged on the top of the base 1, and further includes:

[0032] The cylinder 3 is fixedly arranged on one side of the top of the base 1. An L-shaped bracket 4 is fixedly arranged on the movable end of the cylinder 3. A steel bar anchor feed pipe 5 extending downward is fixedly arranged on the top of the L-shaped bracket 4. When the cylinder 3 is extended and retracted, it can drive the L-shaped bracket 4 and the steel bar anchor feed pipe 5 to move up and down, so that the steel bar anchor feed pipe 5 can be close to the welded sleeve. At the same time, the steel bar anchor can be vertically docked on the welding part of the sleeve through the steel bar anchor feed pipe 5.

[0033] The electromagnetic positioning mechanism 6 is arranged inside the steel bar anchor feeding pipe 5, and the electromagnetic positioning mechanism 6 is used to clamp and position the steel bar anchors inside the steel bar anchor feeding pipe 5. The electromagnetic positioning mechanism 6 includes an annular installation groove 61 arranged on the inner wall of the steel bar anchor feeding pipe 5. Arc-shaped positioning plates 62 are symmetrically arranged inside the annular installation groove 61. Two telescopic rods 63 are symmetrically and fixedly arranged between the side walls of the two arc-shaped positioning plates 62 and the side walls of the annular installation groove 61. The rod walls of the two telescopic rods 63 are sleeved with first springs 64, and the two ends of the first spring 64 are respectively fixedly connected with the arc-shaped positioning plate 62 and the annular installation groove 61. Electromagnetic blocks 65 are fixedly arranged on both sides of the annular installation groove 61. Permanent magnetic blocks 66 corresponding to the positions of the electromagnetic blocks 65 are fixedly arranged on the side walls of the two arc-shaped positioning plates 62. After the power supply of the electromagnetic block 65 is turned on, a magnetic field with the same polarity as the permanent magnetic block 66 is generated after the electromagnetic block 65 is electrified. Using the magnetic repulsive force, the permanent magnetic block 66 is pushed to drive the arc-shaped positioning plate 62 to expand outwards against the elastic force of the first spring 64 until the arc-shaped positioning plate 62 is in close contact with the outer wall of the steel bar anchor, realizing the stable clamping and fixing of the steel bar anchor; Infrared transmitters 67 and infrared receivers 68 are symmetrically and fixedly arranged on the side wall of the annular installation groove 61, and the infrared transmitters 67 and infrared receivers 68 are located between the two arc-shaped positioning plates 62. The steel bar anchor can be vertically placed along the steel bar anchor feeding pipe 5. At the same time, the steel bar anchor will pass between the infrared transmitter 67 and the infrared receiver 68. When there is no steel bar anchor passing through, the infrared beam emitted by the infrared transmitter 67 can be smoothly received by the infrared receiver 68. When the steel bar anchor falls through the area between the infrared transmitter 67 and the infrared receiver 68, it can be detected whether the steel bar anchor is placed (the beam emitted by the infrared transmitter 67 will just irradiate on the middle surface of the falling steel bar anchor. Since the diameter of the steel bar anchor is much larger than the diameter of the beam emitted by the infrared transmitter 67, the beam received by the infrared receiver 68 can be effectively blocked, thereby triggering positioning and clamping).

[0034] The rotary welding mechanism 7 is arranged at the lower end of the tube wall of the steel bar anchor feeding tube 5, and the rotary welding mechanism 7 is used to rotary weld the connection between the steel bar anchor and the sleeve. The rotary welding mechanism 7 includes a circular shell 71 fixedly arranged on the outer wall of the steel bar anchor feeding tube 5, and a first motor 72 is fixedly provided on one side of the top of the circular shell 71. The output shaft of the first motor 72 extends to the interior of the circular shell 71 and is fixed with a gear 73. A gear ring 74 is provided inside the circular shell 71, and the inner wall of the gear ring 74 is rotatably connected to the outer wall of the steel bar anchor feeding tube 5 through a bearing. The gear 73 is meshed with the gear ring 74, and a mounting plate 75 is fixed on one side of the bottom of the gear ring 74. A self-contained welding wire welding gun 76 is fixed on the side and is set at an angle. The operation of the first motor 72 can drive the gear 73 to rotate synchronously. The gear 73 and the ring gear 74 are engaged with each other, thereby driving the ring gear 74 to rotate. The mounting plate 75 fixed at the bottom of the ring gear 74 will rotate together with the ring gear 74, and the self-contained welding wire welding gun 76 on the mounting plate 75 will also rotate accordingly to perform circumferential welding on the contact part between the steel anchor and the sleeve (during the welding process of the self-contained welding wire welding gun 76, since the electromagnetic positioning mechanism 6 is at a certain distance from the welding point, even if the steel anchor may conduct heat during the welding process, this distance is large enough and the electromagnetic positioning mechanism 6 will not fail due to heat conduction).

[0035] The sleeve flip mechanism 8 is arranged on one end of the L-shaped bracket 4, and the sleeve flip mechanism 8 is used in conjunction with the sleeve holder 2. The sleeve flip mechanism 8 includes a fixed plate 81 fixedly arranged on one end of the L-shaped bracket 4, and an elastic rod 82 is fixedly provided on the lower surface of the fixed plate 81. The lower end of the elastic rod 82 is fixedly provided with a sleeve pressing seat 83. The top of the sleeve holder 2 and the bottom of the sleeve pressing seat 83 are both provided with an arc-shaped placement groove 10. The upper and lower arc-shaped placement grooves 10 are combined to place the sleeve. The sleeve pressing seat 83 adopts a hollow structure, and the sleeve pressing seat 83 The inner part of the sleeve is symmetrically rotated with rubber pressure rollers 84 (the material of the two rubber pressure rollers 84 will not cause extrusion damage to the sleeve. At the same time, the friction resistance of the rubber material is large, which can ensure that the two rubber pressure rollers 84 can drive the sleeve to rotate together when rotating). The roller walls of the two rubber pressure rollers 84 extend to the outside of the sleeve pressure seat 83, and one end of the two rubber pressure rollers 84 extends outward and is fixed with a sprocket 85. The two sprockets 85 are meshed with a chain 86. The side wall of the sleeve pressure seat 83 is fixed with a sprocket 85 and a chain 86. The side wall of the isolation cover 87 is fixed with a second motor 88, and the output end of the second motor 88 is fixedly connected to one end of one of the rubber pressure rollers 84. The second motor 88 is a self-locking motor (the self-locking motor can realize the self-locking function of the rotating shaft when it is not rotating, thereby ensuring that the two rubber pressure rollers 84 will not rotate easily); the elastic rod 82 includes an outer tube 821 fixedly arranged on the lower surface of the fixed plate 81, and an inner rod 822 is provided inside the outer tube 821. The upper end of the inner rod 822 is connected to the inner wall of the outer tube 821. A second spring 823 is fixedly provided between the inner rod 822, and the lower end of the inner rod 822 is fixedly connected to the top of the sleeve pressure seat 83; a limiting rod 824 is fixedly provided on one side of the rod wall of the inner rod 822, and a limiting opening that cooperates with the limiting rod 824 is opened on the tube wall of the outer tube 821. When the inner rod 822 is squeezed upward, the limiting rod 824 moves inside the limiting opening to prevent the inner rod 822 from rotating inside the outer tube 821. At the same time, the inner rod 822 will squeeze the second spring 823 when it moves upward, so that the sleeve pressure seat 83 has the function of elastic expansion and contraction.

[0036] The PLC controller 9 is fixedly arranged on the side wall of the sleeve bracket 2 , and the cylinder 3 , the electromagnetic positioning mechanism 6 , the rotary welding mechanism 7 and the sleeve turning mechanism 8 are all electrically connected to the PLC controller 9 .

[0037] The operating principle of the present invention is described as follows: After the construction personnel turn on the power of the equipment, they place the casing to be monitored and measured steadily into the arc-shaped placement groove 10 of the casing holder 2, and achieve rapid positioning through the limiting structure of the arc-shaped groove. Subsequently, the PLC controller 9 is manually operated to start the cylinder 3. When the cylinder 3 retracts, it drives the L-shaped bracket 4 to move downward, so that the lower end of the steel bar anchor feed pipe 5 is accurately close to the casing to be welded. At the same time, the self-contained welding wire welding gun 76 integrated in the lower end of the steel bar anchor feed pipe 5 is also synchronously put into place;

[0038] During the retraction of the cylinder 3, it drives the L-shaped bracket 4 to move downward. By virtue of its connection structure with the fixed plate 81, it drives the fixed plate 81 to move downward synchronously. As the fixed plate 81 moves downward, the elastic rod 82 and the sleeve pressure seat 83 on the surface of the fixed plate 81 also move downward accordingly. When the sleeve pressure seat 83 gradually approaches the sleeve support 2, the two rubber pressure rollers 84 inside the sleeve pressure seat 83 come into contact with the sleeve inside the arc-shaped placement groove 10 of the sleeve support 2, and jointly clamp the sleeve. During this process, when the sleeve pressure seat 83 comes into contact with the sleeve instantaneously, the sleeve generates a reaction force on the sleeve pressure seat 83, prompting the sleeve pressure seat 83 to squeeze the elastic rod 82. The elastic rod 82 is composed of an outer tube 821 and an inner rod 822. The upper end of the inner rod 822 is movable inside the outer tube 821, and a second spring 823 is installed between the outer tube 821 and the inner rod 822. When being squeezed, the upper end of the inner rod 822 moves upward inside the outer tube 821, compressing the second spring 823. This structural design endows the sleeve pressure seat 83 with the function of elastic expansion and contraction. When clamping the sleeve, it can effectively buffer the external force applied to the sleeve. Even in the case of a large clamping force, due to the buffering effect of the elastic rod 82 and the second spring 823, it can avoid the sleeve pressure seat 83 and the sleeve support 2 applying excessive extrusion force to the sleeve, thereby preventing the sleeve from being damaged due to excessive force and ensuring the integrity and service performance of the sleeve; At this time, the construction worker holds the steel bar anchor and vertically inserts it along the steel bar anchor feeding pipe 5. The steel bar anchor will pass between the infrared emitter 67 and the infrared receiver 68. When there is no steel bar anchor passing through, the infrared beam emitted by the infrared emitter 67 can be smoothly received by the infrared receiver 68. When the steel bar anchor falls through the area between the infrared emitter 67 and the infrared receiver 68, it will block the infrared beam, and the infrared receiver 68 cannot receive the infrared light signal. The photoelectric conversion element inside it converts the change of the light signal into an electrical signal. After this electrical signal is processed by circuits such as amplification and filtering (this is a common circuit design in this field, so it is not specifically disclosed here), it feeds back a trigger signal to the PLC controller 9;

[0039] After receiving the triggered feedback signal, the PLC controller 9 executes a 3-second delay program to ensure that the steel bar anchor completely falls into the lower end of the steel bar anchor feeding pipe 5 and stably contacts the welding part of the sleeve. After the delay ends, the PLC controller 9 controls to turn on the power supply of the electromagnet 65. After the electromagnet 65 is powered on, it generates a magnetic field with the same polarity as the permanent magnet 66. Using the magnetic repulsive force, it pushes the permanent magnet 66 to drive the arc-shaped positioning plate 62 to expand outward against the elastic force of the first spring 64 until the arc-shaped positioning plate 62 closely fits the outer wall of the steel bar anchor, realizing the stable clamping and fixing of the steel bar anchor and providing a reliable positioning guarantee for the subsequent welding process;

[0040] After the positioning of the steel bar anchor is completed, the PLC controller 9 immediately starts the first motor 72. When the first motor 72 operates, its output shaft drives the gear 73 to rotate synchronously. The gear 73 meshes with the gear ring 74, thereby driving the gear ring 74 to rotate. The mounting plate 75 fixed to the bottom of the gear ring 74 will rotate together with the gear ring 74, and the self - contained wire welding torch 76 on the mounting plate 75 will also rotate accordingly, performing circumferential welding on the contact part between the steel bar anchor and the sleeve (the wire feeding mechanism on the self - contained wire welding torch 76 transports the welding wire to the welding area under electrical control, and the electrode of the welding torch generates an electric arc. The high temperature of the electric arc melts the welding wire and the contact part, and after cooling and solidification, a weld seam is formed). During the welding process, the PLC controller 9 precisely controls the first motor 72 to rotate 360°, completing one circumferential welding. When the next welding is carried out, the PLC controller 9 controls the first motor 72 to rotate reversely by 360°, driving the self - contained wire welding torch 76 to perform reverse circumferential welding again. In this way, the 360° rotation welding in the forward and reverse directions is alternately carried out (this process is through the control logic pre - set in the PLC controller 9), which can fully cover the contact part between the steel bar anchor and the sleeve, ensure the integrity of the welding, effectively improve the welding efficiency, and at the same time, will not cause the phenomenon of wire entanglement;

[0041] When the steel bar anchor and the sleeve have completed two circumferential weldings in the forward and reverse directions, the PLC controller 9 quickly controls the power supply of the electromagnet block 65 to be cut off. At this time, the electromagnet block 65 no longer generates the magnetic repulsive force on the permanent magnet block 66. The arc - shaped positioning plate 62 quickly resets under the elastic force of the first spring 64, and the permanent magnet block 66 also resets together with the arc - shaped positioning plate 62, thereby releasing the positioning and fixing of the steel bar anchor. Immediately afterwards, the PLC controller 9 issues an instruction to control the cylinder 3 to extend, driving the L - shaped bracket 4 and the steel bar anchor feeding pipe 5 to move upward synchronously, so that the steel bar anchor feeding pipe 5 can smoothly disengage from the outside of the steel bar anchor. During the upward movement of the steel bar anchor feeding pipe 5, the fixing plate 81 will also move upward synchronously with the L - shaped bracket 4. At this time, the degree of compression of the elastic rod 82 by the fixing plate 81 decreases, and the elastic rod 82 gradually elongates due to its own elastic force. Moreover, the lower end of the elastic rod 82 always exerts a downward elastic force on the sleeve seat 83, which can ensure that the two rubber rollers 84 inside the sleeve seat 83 always contact the top of the sleeve (when the steel bar anchor feeding pipe 5 is taken out from the outside of the steel bar anchor, the elastic force of the elastic rod 82 is sufficient to ensure that the two rubber rollers 84 are in close contact with the top of the sleeve, and the phenomenon of the two rubber rollers 84 separating from the sleeve will not occur, thus preparing for the subsequent driving of the sleeve to flip);

[0042] After the steel bar anchor feeding pipe 5 is completely separated, the PLC controller 9 immediately starts the second motor 88. When the second motor 88 is running, it drives one of the rubber pressure rollers 84 to rotate. Since the two rubber pressure rollers 84 are connected by a sprocket 85 and a chain 86, when one of the rubber pressure rollers 84 rotates, the sprocket 85 connected thereto rotates accordingly. Through the transmission of the chain 86, the other sprocket 85 rotates synchronously, thereby realizing the synchronous rotation of the two rubber pressure rollers 84. Because the two rubber pressure rollers 84 keep in contact with the top of the casing, under the action of friction, the two rubber pressure rollers 84 can drive the casing to rotate synchronously, so that the casing rotates in the arc-shaped placement groove 10 of the casing bracket 2, completing the turning operation, preparing for welding at other positions of the casing, and being able to weld multiple steel bar anchors on the casing;

[0043] After the welding is completed, the construction personnel manually operate the PLC controller 9 to control the extension of the cylinder 3, so that the steel bar anchor feeding pipe 5 and the sleeve pressing seat 83 move up synchronously until the steel bar anchor feeding pipe 5 is taken out from the outside of the steel bar anchor. At the same time, the sleeve pressing seat 83 is separated from the sleeve inside the sleeve support 2, and the construction personnel can then take out the welded sleeve.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding device for tunnel construction, comprising a base (1) and a sleeve bracket (2) fixedly arranged on the top of the base (1), characterized in that, It further includes: A cylinder (3) fixedly arranged on one side of the top of the base (1). A movable end of the cylinder (3) is fixedly provided with an L-shaped bracket (4), and a reinforcing bar anchor feeding pipe (5) extending downward is fixedly arranged on the top of the L-shaped bracket (4); An electromagnetic positioning mechanism (6) arranged inside the reinforcing bar anchor feeding pipe (5), and the electromagnetic positioning mechanism (6) is used for clamping and positioning the reinforcing bar anchors inside the reinforcing bar anchor feeding pipe (5). The electromagnetic positioning mechanism (6) includes an annular installation groove (61) arranged on the inner wall of the reinforcing bar anchor feeding pipe (5). Arc-shaped positioning plates (62) are symmetrically arranged inside the annular installation groove (61). Two telescopic rods (63) are symmetrically and fixedly arranged between the side walls of the two arc-shaped positioning plates (62) and the side walls of the annular installation groove (61). A first spring (64) is sleeved on the rod walls of the two telescopic rods (63), and two ends of the first spring (64) are respectively fixedly connected with the arc-shaped positioning plate (62) and the annular installation groove (61). Electromagnetic blocks (65) are fixedly arranged on both sides of the annular installation groove (61). Permanent magnetic blocks (66) corresponding to the positions of the electromagnetic blocks (65) are fixedly arranged on the side walls of the two arc-shaped positioning plates (62). An infrared emitter (67) and an infrared receiver (68) are symmetrically and fixedly arranged on the side wall of the annular installation groove (61), and the infrared emitter (67) and the infrared receiver (68) are located between the two arc-shaped positioning plates (62); A rotary welding mechanism (7) arranged at the lower end of the pipe wall of the reinforcing bar anchor feeding pipe (5), and the rotary welding mechanism (7) is used for rotary welding the connection part of the reinforcing bar anchor and the sleeve; A sleeve turning mechanism (8) arranged at one end of the L-shaped bracket (4), and the sleeve turning mechanism (8) is used in cooperation with the sleeve support (2). The sleeve turning mechanism (8) includes a fixing plate (81) fixedly arranged at one end of the L-shaped bracket (4). An elastic rod (82) is fixedly arranged on the lower surface of the fixing plate (81). A sleeve pressing seat (83) is fixedly arranged at the lower end of the elastic rod (82). The sleeve pressing seat (83) adopts a hollow structure, and rubber pressing rollers (84) are symmetrically and rotatably arranged inside the sleeve pressing seat (83). The rod walls of the two rubber pressing rollers (84) extend to the outside of the sleeve pressing seat (83), and one ends of the two rubber pressing rollers (84) extend outward and are fixedly provided with chain wheels (85). The same chain (86) is meshed between the two chain wheels (85). An isolation cover (87) covering the chain wheels (85) and the chain (86) is fixedly arranged on the side wall of the sleeve pressing seat (83). A second motor (88) is fixedly arranged on the side wall of the isolation cover (87), and an output end of the second motor (88) is fixedly connected with one end of one of the rubber pressing rollers (84). The second motor (88) is a self-locking motor; The PLC controller (9) is fixedly arranged on the side wall of the casing support (2), and the air cylinder (3), the electromagnetic positioning mechanism (6), the rotary welding mechanism (7) and the casing turning mechanism (8) are all electrically connected to the PLC controller (9).

2. The welding equipment for tunnel construction according to claim 1, characterized in that, The rotary welding mechanism (7) includes a circular shell (71) fixedly arranged on the outer wall of the steel bar anchor stock blanking pipe (5). On one side of the top of the circular shell (71), a first motor (72) is fixedly arranged. The output shaft of the first motor (72) extends into the interior of the circular shell (71) and is fixedly provided with a gear (73). A gear ring (74) is arranged inside the circular shell (71), and the inner wall of the gear ring (74) is rotationally connected to the outer wall of the steel bar anchor stock blanking pipe (5) through a bearing. The gear (73) is meshed with the gear ring (74). On one side of the bottom of the gear ring (74), a mounting plate (75) is fixedly arranged, and an inclined self-carrying welding wire welding torch (76) is fixedly arranged on the side surface of the mounting plate (75).

3. A welding device for tunnel construction according to claim 1, characterized in that, The elastic rod (82) includes an outer tube (821) fixedly arranged on the lower surface of the fixing plate (81). An inner rod (822) is arranged inside the outer tube (821). A second spring (823) is fixedly arranged between the upper end of the inner rod (822) and the inner wall of the outer tube (821), and the lower end of the inner rod (822) is fixedly connected to the top of the casing pressing seat (83).

4. A welding device for tunnel construction according to claim 3, characterized in that, A limiting rod (824) is fixedly arranged on one side of the rod wall of the inner rod (822), and a limiting port matching with the limiting rod (824) is formed in the pipe wall of the outer tube (821).

5. A welding device for tunnel construction according to claim 1, characterized in that, Arc-shaped placing grooves (10) are arranged on the top of the casing support (2) and the bottom of the casing pressing seat (83).

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