A pneumatic safety isolation door for disc shear and edge trim shear maintenance

Abstract

The utility model relates to the technical field of isolation protection equipment, and disclose a disc shears, edge cutting shear is overhauled pneumatic safety isolation door, include: mounting support main part, isolation door, set up in mounting support main part inside, drive unit, set up in mounting support main part top, adopt cylinder drive one -sided isolation door lift, synchronous mechanism is used for driving two isolation doors synchronous lift, safety locking device, set up in mounting support main part bottom, lock after isolation door is lowered in position, detection control system, set up in mounting support main part bottom, monitor isolation door position, lock state and interlock production line safety loop. The disc shears, edge cutting shear is overhauled pneumatic safety isolation door, through the rigid synchronous structure of gear and rack and mechanical, sensor double -action safety locking mechanism, realize quick isolation, and the maintenance accident rate reduces 95%, and fills the blank of high -speed strip production line safety protection industry.

Description

Technical Field

[0001] This utility model relates to the field of isolation and protection equipment technology, specifically a pneumatic safety isolation door for the maintenance of disc shears and edge trimmers. Background Technology

[0002] In high-speed strip steel production lines, disc shears and edge trimmers require frequent maintenance (such as blade replacement), but the operating strip steel (high temperature, high speed, high tension) poses significant safety risks. Existing isolation devices have the following deficiencies:

[0003] Firstly, poor synchronization accuracy: Hydraulic or electric motor driven doors often jam or fail to close properly due to asynchrony, causing safety hazards;

[0004] Secondly, insufficient self-locking: the pneumatic isolation door cannot self-lock after depressurization, resulting in low isolation reliability;

[0005] Third, there is a lack of safety interlocks: traditional designs do not interlock the door position detection with the unit operation, which can easily lead to accidents due to misoperation. Therefore, there is an urgent need for a pneumatic safety isolation door for the maintenance of disc shears and edge shears to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a pneumatic safety isolation door for the maintenance of disc shears and edge trimmers. It solves the problems of poor synchronization accuracy of existing isolation devices driving the door, the inability of the pneumatic isolation door to self-lock after pressure loss, and the easy occurrence of accidents due to misoperation when interlocking the door position detection with the unit operation.

[0008] (II) Technical Solution

[0009] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A pneumatic safety isolation door for the maintenance of disc shears and edge trimmers includes:

[0010] The main body of the mounting bracket is fixed to the production line frame, providing an overall load-bearing structure;

[0011] An isolation door is installed inside the main body of the mounting bracket. There are two isolation doors, one on each side of the main body of the mounting bracket, covering the operating areas of the disc shear and the edge shear, so as to achieve physical isolation between maintenance personnel and the operating strip steel.

[0012] The drive unit, located on the top of the mounting bracket body, uses a cylinder to drive the lifting and lowering of the isolation door on one side;

[0013] A synchronization mechanism is used to drive the two isolation doors to rise and fall synchronously.

[0014] A safety locking device is installed at the bottom of the mounting bracket body and locks in place after the isolation door is lowered into position.

[0015] The detection and control system is located at the bottom of the mounting bracket body to monitor the position and locking status of the isolation door and interlock the safety circuit of the production line.

[0016] The beneficial effects of this utility model are:

[0017] This pneumatic safety isolation door for the maintenance of disc shears and edge shears achieves rapid isolation through a rigid synchronous structure of gears and racks and a dual-action safety locking mechanism of machinery and sensors, reducing the maintenance accident rate by 95% and filling the gap in the safety protection industry for high-speed strip steel production lines.

[0018] Based on the above technical solution, the present invention can be further improved as follows.

[0019] Furthermore, the synchronization mechanism includes a rack, a gear, and a drive shaft. The rack is fixed to the inner wall of the mounting bracket body, and the drive shaft passes horizontally through the two isolation doors and is rotatably connected by bearings.

[0020] The advantages of adopting the above-mentioned further solutions are that it avoids meshing deviation when the door is raised or lowered; the horizontal through-drive shaft design enhances rigidity through bearing support and ensures synchronization accuracy.

[0021] Furthermore, gears are connected to both ends of the drive shaft via splines. There are two drive shafts, which are symmetrically distributed on the left and right ends of the isolation door. The gears mesh with racks.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the symmetrical layout of the dual drive shafts balances the transmission torque and eliminates the risk of deformation under stress on a single shaft.

[0023] Furthermore, the safety locking device is a hydraulic bolt lock, and the side wall of the isolation door has a lock hole that cooperates with the hydraulic bolt lock.

[0024] The beneficial effect of adopting the above-mentioned further solution is to achieve a rigid connection between the gate and the frame, preventing the gate from rising unexpectedly during the operation of the strip steel.

[0025] Furthermore, the detection and control system includes a locking position sensor, a lifting travel limit switch, and an emergency stop button. When the emergency stop button is triggered, the pneumatic power source is simultaneously cut off and the safety locking device is activated.

[0026] The beneficial effect of adopting the above-mentioned further solution is that cutting off the air supply forces the drive unit to lose pressure and lock itself.

[0027] Furthermore, the drive unit also includes a counterweight block installed at the end of the cylinder piston rod, and a spring is sleeved on the stroke path of the cylinder piston rod.

[0028] The beneficial effect of adopting the above-mentioned further solution is that the weight of the counterweight or the spring force pushes the piston rod to extend, forcing the door to descend to the locked position. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a top view of the structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the synchronization mechanism in this utility model;

[0032] Figure 4 This is a schematic diagram of the synchronization mechanism in another direction of this utility model.

[0033] In the diagram: 1. Isolation door; 2. Drive unit; 3. Synchronization mechanism; 4. Safety locking device; 5. Detection and control system; 6. Rack; 7. Gear; 8. Drive shaft; 9. Mounting bracket body. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] In the embodiments, by Figure 1-4 This invention provides a pneumatic safety isolation door for the maintenance of disc shears and edge trimmers. The invention includes:

[0036] Mounting bracket body 9 is fixed on the production line frame, providing an overall load-bearing structure. The whole is a welded steel structure, with a cylinder mounting platform on the top and reserved installation space at the bottom to adapt to bolt fixing of different production line frames;

[0037] Isolation door 1 is installed inside the main body 9 of the mounting bracket. There are two isolation doors 1, which are respectively installed on both sides of the main body 9 of the mounting bracket, covering the operating areas of the disc shear and the edge shear, so as to achieve physical isolation between maintenance personnel and the operating strip steel.

[0038] Drive unit 2 is located on the top of the mounting bracket body 9 and uses a cylinder to drive the lifting and lowering of the isolation door 1 on one side;

[0039] Synchronization mechanism 3 is used to drive the two isolation doors 1 to rise and fall synchronously;

[0040] Safety locking device 4 is located at the bottom of the mounting bracket body 9 and locks after the isolation door 1 is lowered into place;

[0041] The detection and control system 5 is located at the bottom of the mounting bracket body 9. It monitors the position and locking status of the isolation door 1 and interlocks the safety circuit of the production line. It is connected to the production line control unit (PLC).

[0042] The synchronization mechanism 3 includes a rack 6, a gear 7, and a drive shaft 8. The rack 6 is fixed on the inner wall of the mounting bracket body 9. The drive shaft 8 passes horizontally through both sides of the isolation door 1 and is rotatably connected by bearings. The two ends of the drive shaft 8 are respectively connected to the gear 7 by splines. There are two drive shafts 8, which are symmetrically distributed on the left and right ends of the isolation door 1. The gear 7 meshes with the rack 6.

[0043] The rack 6 has a module ≥4 and a precision grade of 6. The gear 7 is hardened with an HRC ≥55. The drive shaft 8 features a horizontal through-type design with bearing support to enhance rigidity and ensure synchronization accuracy, solving the industry problem of synchronization for large-span doors. The drive shaft 8 is a solid steel shaft with a diameter of 60-100mm. The symmetrical layout of the dual drive shafts balances the transmission torque and eliminates the risk of deformation under single-shaft stress. The spline connection improves the fit accuracy between the gear 7 and the drive shaft 8. The measured displacement error is ≤0.5mm, while the industry standard is ≤2mm. The synchronization accuracy is improved by 80%, avoiding meshing deviation during door lifting and lowering, and extending service life.

[0044] The safety locking device 4 is a hydraulic bolt lock. The side wall of the isolation door 1 is provided with a lock hole that cooperates with the hydraulic bolt lock, so as to realize the rigid connection between the isolation door 1 and the main body of the mounting bracket 9 and prevent the door from rising accidentally during the operation of the strip steel.

[0045] The detection and control system 5 includes a locking position sensor, a lifting travel limit switch and an emergency stop button. The locking position sensor (proximity switch, accuracy ±0.1mm) monitors the pin position of the hydraulic bolt lock 4 in real time. When the bolt is fully inserted into the lock hole on the side wall of the isolation door 1, it triggers the "locked in place" signal. The locking position sensor is installed directly aligned with the bolt insertion point to monitor the bolt position in real time.

[0046] Lifting travel limit switches: These detect the final position of the lifting of the isolation door 1 and send a "door raised to the limit" or "door lowered to the limit" status signal. The lifting travel limit switches are installed on the top and bottom frames of the mounting bracket body 9. The upper limit switch is on the top frame, corresponding to the fully raised position of the isolation door 1; the lower limit switch is on the bottom frame, corresponding to the fully lowered position of the isolation door 1. The switches detect the door contact points through mechanical contacts or magnetic induction. The top layout prevents the door from overtraveling and interfering with the production line; the bottom layout works in conjunction with the locking position sensor to ensure that the locking sequence is triggered after the "door lowered to the limit" is achieved. The layout spacing is based on the door travel (actual measurement error ≤ 0.5mm) to avoid false triggering.

[0047] The emergency stop button is located in an easily accessible position in the safety isolation door area. When the emergency stop button is triggered, the pneumatic power source is cut off simultaneously and the safety locking device 4 is activated. Cutting off the air source forces the drive unit 2 to lose pressure and self-lock, and activates the hydraulic bolt lock to rigidly lock the door body, ensuring that emergency isolation is completed within 3 seconds, reducing the accident rate by 95%.

[0048] The drive unit 2 also includes a counterweight installed at the end of the cylinder piston rod, and a spring is sleeved on the stroke path of the cylinder piston rod.

[0049] When the cylinder loses pressure, the weight of the counterweight and the spring force push the piston rod to extend, forcing the door to descend to the locked position, realizing a "fail-safe" mechanism. No external energy is required, which completely solves the industry pain point of insufficient reliability of pneumatic isolation doors when pressure is lost.

[0050] Working principle:

[0051] During normal operation of the high-speed strip steel production line, safety isolation door 1 is in the raised position to avoid interfering with the strip steel operation. When maintenance personnel activate the maintenance mode, the cylinder of drive unit 2 extends, causing isolation door 1 to descend into position. The hydraulic pin lock of safety locking device 4 is automatically activated, pushing the pin horizontally into the lock hole on the side wall of isolation door 1 to achieve a rigid connection. The locking position sensor of detection control system 5 triggers the "locked in place" signal. The lifting stroke limit switch simultaneously verifies the "door lowered in place" signal. After receiving the two signals, the production line control unit sends a command to cut off the strip steel power and lock the production line safety circuit to ensure the safety of the maintenance area.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic safety isolation door for the maintenance of disc shears and edge trimmers, characterized in that, include: Mounting bracket body (9) is fixed on the production line frame to provide an overall load-bearing structure; An isolation door (1) is installed inside the main body (9) of the mounting bracket. There are two isolation doors (1), which are respectively installed on both sides of the main body (9) of the mounting bracket, covering the operating area of ​​the disc shear and the edge shear, so as to achieve physical isolation between maintenance personnel and the running strip steel. The drive unit (2) is located on the top of the mounting bracket body (9) and uses a cylinder to drive the lifting and lowering of the isolation door (1) on one side; Synchronization mechanism (3) is used to drive the two isolation doors (1) to rise and fall synchronously; The safety locking device (4) is located at the bottom of the mounting bracket body (9) and is locked after the isolation door (1) is lowered into place; The detection and control system (5) is set at the bottom of the mounting bracket body (9) to monitor the position and locking status of the isolation door (1) and interlock the production line safety circuit.

2. The pneumatic safety isolation door for maintenance of disc shears and edge trimmers according to claim 1, characterized in that: The synchronization mechanism (3) includes a rack (6), a gear (7) and a drive shaft (8). The rack (6) is fixed on the inner wall of the mounting bracket body (9). The drive shaft (8) passes horizontally through the isolation doors (1) on both sides and is rotatably connected by bearings.

3. The pneumatic safety isolation door for maintenance of disc shears and edge trimmers according to claim 2, characterized in that: The two ends of the drive shaft (8) are respectively connected to gears (7) via splines. There are two drive shafts (8), which are symmetrically distributed on the left and right ends of the isolation door (1). The gears (7) mesh with the rack (6).

4. The pneumatic safety isolation door for maintenance of disc shears and edge trimmers according to claim 1, characterized in that: The safety locking device (4) is a hydraulic bolt lock, and the side wall of the isolation door (1) is provided with a lock hole that cooperates with the hydraulic bolt lock.

5. A pneumatic safety isolation door for the maintenance of disc shears and edge trimmers according to claim 1, characterized in that: The detection and control system (5) includes a locking position sensor, a lifting stroke limit switch and an emergency stop button. When the emergency stop button is triggered, the pneumatic power source is simultaneously cut off and the safety locking device (4) is activated.

6. A pneumatic safety isolation door for maintenance of disc shears and edge trimmers according to claim 1, characterized in that: The drive unit (2) also includes a counterweight block installed at the end of the cylinder piston rod, and a spring is sleeved on the stroke path of the cylinder piston rod.

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