Rotation limiting device of vertical shaft heading machine

Abstract

The utility model relates to the technical field of rotation limiting of vertical shaft heading machines, in particular to a rotation limiting device of a vertical shaft heading machine, which comprises a stay wire sensor, a fixing support, a base plate and a rotating groove. The other end of the fixing support is combined with the base plate through a bolt, the pull wire sensor is wound in the rotating groove through a steel wire rope, one end of the steel wire rope is provided with a pull wire head, and the steel wire rope is connected with the fixing ring on the rotating groove through the pull wire head. The stay wire sensor automatically judges whether the encoder of the motor driving the rotary motion breaks down or not according to the length of the steel wire rope, and automatically stops and reminds maintenance when the encoder breaks down.

Description

Technical Field

[0001] The utility model relates to the technical field of rotation limiting of a shaft boring machine, in particular to a rotation limiting device of a shaft boring machine. Background Art

[0002] At present, with the development of urban construction, tunnel construction, urban subway construction, pipe gallery construction and urban underground shaft-type underground garage construction have spawned a large number of urban shaft construction construction needs. The traditional shaft construction method has high requirements for both construction sites and labor. Different construction processes also require multiple large-scale site construction machinery and equipment of different categories to cooperate with the construction. The construction process is complicated and inefficient. For busy traffic areas and urban congestion areas, the coordination work is difficult, and the small available construction area is a more prominent problem. As a new type of urban underground construction equipment, the shaft boring machine has many successful construction cases in many foreign projects. Its equipment is widely used in the starting tunnel of the subway, the ventilation shaft of the subway tunnel, and the construction of urban limited space shafts. As an important part of the shaft excavation, the central warehouse needs to have a rotating operation function for the actuator it carries. During the rotating operation, the encoder of the rotating motor is mainly used to limit its rotation angle. If the encoder fails or fails, it will cause the rotation to exceed the limit angle, resulting in internal pipelines and drag chain pulling damage, which will cause greater equipment safety accidents.

[0003] Therefore, a slewing limit device of a shaft boring machine is designed to solve the above technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is that during the rotation operation of the shaft boring machine, the rotation angle is mainly limited by the encoder of the rotary motor. If the encoder fails or fails, the rotation will exceed the limit angle, causing the internal pipeline and the drag chain to be pulled and damaged, thereby causing a greater equipment safety accident.

[0005] The utility model provides the following technical solutions: a slewing limit device for a shaft boring machine, comprising a wire pulling sensor, a fixed bracket, a pad and a rotating groove, the wire pulling sensor is assembled with the fixed bracket through its own positioning hole by bolt connection and fixed to one end of the fixed bracket, the other end of the fixed bracket is engaged with the pad by bolts, the wire pulling sensor is wound in the rotating groove by a steel wire rope, a wire pulling head is provided at one end of the steel wire rope, and the steel wire rope is connected to a fixed ring on the rotating groove by the wire pulling head.

[0006] Preferably, a spring shaft is installed in the pull-wire sensor, a spring is installed in the spring shaft, and the wire rope is wound around the spring shaft; the pull-wire sensor is used as a measuring tool, and the change in the rotation angle of the central warehouse is fed back by the change in the absolute value of the length of the wire rope extended from it. The pull-wire sensor itself has a spring design inside, and when the wire rope is pulled out by external force, it can be stretched out in a tight state. When the wire rope is not under tension, the internal spring retracts it into the pull-wire box.

[0007] Preferably, the pad is welded with a horizontal drag chain outer bottom plate, the horizontal drag chain outer bottom plate is rotatably mounted with a horizontal drag chain inner bottom plate, a rotation groove is welded on the horizontal drag chain inner bottom plate, a fixing ring is mounted on the rotation groove, and the fixing ring is connected to the pull wire head; the rotation range of the horizontal drag chain inner bottom plate on the horizontal drag chain outer bottom plate is -200 o -200 o ;

[0008] The wire sensor is assembled with the fixed bracket and the pad by bolts, and the pad is welded to the outer bottom plate of the horizontal drag chain, which is fixed. The wire head of the wire sensor is connected to the fixed ring on the rotating groove, and the rotating groove itself is welded to the inner bottom plate of the horizontal drag chain. As the inner bottom plate of the horizontal drag chain rotates within the range of + / - 200o, the wire rope wound on the rotating groove continuously extends and retracts. When rotating clockwise, it is pulled out relative to the wire sensor, and when rotating counterclockwise, it is retracted relative to the wire sensor.

[0009] Preferably, when the rotation angle of the inner bottom plate of the horizontal drag chain is -200 o When the horizontal drag chain inner bottom plate rotates at an angle of 200° on the horizontal drag chain outer bottom plate, the steel wire rope is at its shortest length. o When , the steel wire rope is at its longest length;

[0010] The wire sensor initially marks the length of the wire rope in two different states: the maximum positive angle and the maximum negative angle. The shortest length corresponds to 200° in the negative direction. o , the longest length corresponds to the positive direction 200 o When the wire sensor feedback signal is that the wire rope length is the maximum or minimum length value, the control system will issue a stop command to the entire actuator. Under normal working conditions, the shaft boring machine itself rotates only within plus or minus 190 degrees. o range, and once the pull wire sensor touches the ±200 o , proving that the encoder of the motor driving the rotational motion is faulty and needs to be shut down for maintenance.

[0011] The beneficial effects of the utility model are as follows:

[0012] 1. The utility model provides a slew limit device on the shaft boring machine, which is an important supplement to the real-time monitoring of the rotation angle in addition to the encoder itself. Especially when the encoder fails, the slew limit device itself is used to send a stop signal in time for the erroneous working condition exceeding the normal rotation angle, thereby ensuring that the entire shaft boring machine will not continue to rotate in the wrong working mode, and greatly reducing the possibility of serious damage to the equipment caused by the failure of a single encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation of various components of the rotary limit device of the utility model;

[0016] Figure 3 It is a schematic diagram of the fixing bracket and the pad of the utility model;

[0017] Figure 4 It is a schematic diagram of the rotary limit device of the utility model;

[0018] Figure 5 It is a schematic diagram of the installation position of the clockwork mechanism of the utility model.

[0019] In the figure: 1. wire pulling sensor; 11. wire pulling head; 12. wire rope; 13. spring shaft; 14. spring; 2. fixed bracket; 3. pad; 4. rotating groove; 41. fixed ring; B1. outer bottom plate of horizontal drag chain; B2. inner bottom plate of horizontal drag chain. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figures 1 to 5As shown, a slewing limit device for a shaft boring machine, a slewing limit device for a shaft boring machine, includes a wire sensor 1, a fixed bracket 2, a pad 3 and a rotating groove 4, the wire sensor 1 is assembled with the fixed bracket 2 through its own positioning hole by bolt connection and fixed to one end of the fixed bracket 2, the other end of the fixed bracket 2 is engaged with the pad 3 by bolts, the wire sensor 1 is wound in the rotating groove 4 by a steel wire rope 12, one end of the steel wire rope 12 is provided with a wire head 11, and the steel wire rope 12 is connected to a fixed ring 41 on the rotating groove 4 by the wire head 11.

[0022] The wire sensor 1 has a spring shaft 13 installed inside it, a spring 14 installed inside the spring shaft 13, and the wire rope 12 is wound around the spring shaft 13; the wire sensor 1 is used as a measuring tool, and the change in the rotation angle of the central warehouse is fed back by the change in the absolute value of the length of the wire rope 12 extended out of it. The wire sensor 1 itself has a spring 14 design inside it, which can make the wire rope 12 stretched out tightly when it is pulled out by external force, and when the wire rope 12 is not under tension, the internal spring 14 retracts it into the wire box.

[0023] The pad 3 is welded with a horizontal drag chain outer bottom plate B1, and a horizontal drag chain inner bottom plate B2 is rotatably mounted on the horizontal drag chain outer bottom plate B1. A rotation groove 4 is welded on the horizontal drag chain inner bottom plate B2, and a fixing ring 41 is installed on the rotation groove 4. The fixing ring 41 is connected to the pull wire head 11; the rotation range of the horizontal drag chain inner bottom plate B2 on the horizontal drag chain outer bottom plate B1 is -200 o -200 o ;

[0024] The wire sensor 1 is assembled with the fixing bracket 2 and the pad 3 by bolts, and the pad 3 is welded to the outer bottom plate B1 of the horizontal drag chain. The outer bottom plate B1 of the horizontal drag chain is fixed. The wire head 11 of the wire sensor 1 is connected to the fixing ring 41 on the rotating groove 4. The rotating groove 4 itself is welded to the inner bottom plate B2 of the horizontal drag chain. As the inner bottom plate B2 of the horizontal drag chain rotates by + / - 200 o The wire rope 12 wound on the rotating groove 4 continuously extends and retracts, and is pulled out relative to the wire-drawing sensor 1 when rotating clockwise, and is retracted relative to the wire-drawing sensor 1 when rotating counterclockwise.

[0025] When the rotation angle of the inner bottom plate B2 of the horizontal drag chain is -200 o When the horizontal drag chain inner bottom plate B2 rotates at an angle of 200° on the horizontal drag chain outer bottom plate B1, the steel wire rope 12 is at its shortest length. o When , the steel wire rope 12 is at its longest length;

[0026] The wire sensor 1 initially marks the length values ​​of the wire rope 12 in two different states: the maximum positive angle and the maximum negative angle. The shortest length corresponds to 200 in the negative direction. o , the longest length corresponds to the positive direction 200 o When the feedback signal from the wire sensor 1 is that the length of the wire rope 12 is the maximum or minimum length, the control system will issue a command to the entire actuator to stop rotating. Under normal working conditions, the shaft boring machine itself rotates only within plus or minus 190 degrees. o Within the range, once the pull wire sensor 1 touches the positive and negative 200 o , proving that the encoder of the motor driving the rotational motion is faulty and needs to be shut down for maintenance.

[0027] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A rotary limit device for a shaft boring machine, characterized in that: The invention comprises a wire drawing sensor (1), a fixed bracket (2), a pad (3) and a rotating groove (4); the wire drawing sensor (1) is assembled with the fixed bracket (2) through its own positioning hole and is fixed to one end of the fixed bracket (2) by bolt connection; the other end of the fixed bracket (2) is connected to the pad (3) by bolts; the wire drawing sensor (1) is wound in the rotating groove (4) by a steel wire rope (12); a wire drawing head (11) is provided at one end of the steel wire rope (12), and the steel wire rope (12) is connected to a fixed ring (41) on the rotating groove (4) by means of the wire drawing head (11).

2. A rotation limit device for a shaft boring machine according to claim 1, characterized in that: A spring shaft (13) is installed in the pull-wire sensor (1), a spring (14) is installed in the spring shaft (13), and the steel wire rope (12) is wound around the spring shaft (13).

3. A rotation limit device for a shaft boring machine according to claim 2, characterized in that: A horizontal drag chain outer bottom plate (B1) is welded to the pad (3), a horizontal drag chain inner bottom plate (B2) is rotatably mounted on the horizontal drag chain outer bottom plate (B1), a rotation groove (4) is welded to the horizontal drag chain inner bottom plate (B2), a fixing ring (41) is mounted on the rotation groove (4), and the fixing ring (41) is connected to the pull wire head (11).

4. A rotation limit device for a shaft boring machine according to claim 3, characterized in that: The rotation range of the horizontal drag chain inner bottom plate (B2) on the horizontal drag chain outer bottom plate (B1) is -200 o -200 o .

5. A rotation limiting device for a shaft boring machine according to claim 4, characterized in that: When the rotation angle of the horizontal drag chain inner bottom plate (B2) on the horizontal drag chain outer bottom plate (B1) is -200 o When the steel wire rope (12) is at its shortest length; when the rotation angle of the horizontal drag chain inner bottom plate (B2) on the horizontal drag chain outer bottom plate (B1) is 200 o When the steel wire rope (12) is at its longest length.

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