Pure terephthalic acid (PTA) chain plate chain falling alarm shutdown device

Abstract

The invention discloses a PTA (pure terephthalic acid) chain plate chain separation alarm shutdown device which comprises a conveying pipeline, a control motor, a chain plate and an octagonal gear, the chain plate and the octagonal gear are connected in series through a chain, a chain separation alarm mechanism is arranged on the inner side of the top of the conveying pipeline, and a chain separation shutdown control mechanism used for controlling shutdown of the conveying device is further arranged on the outer side of the conveying pipeline. An interlocking switch is arranged between the chain disengaging shutdown control mechanism and the chain disengaging alarm mechanism, the chain disengaging alarm mechanism is used for monitoring meshing of the chain and the octagonal gear in real time, and when the chain and the octagonal gear are disengaged, the chain disengaging alarm mechanism triggers the interlocking switch to be switched off. And therefore, the chain separation shutdown control mechanism is controlled to stop the conveying device and send out an alarm signal. The problems that in the process that PTA raw materials are conveyed to a PTA stock bin through a chain plate conveying device, a conveying chain is disengaged and cannot be found in time, and shutdown cannot be achieved can be solved, the operation stability and integrity of the conveying device are guaranteed, maintenance is more convenient and timely, and the production stability is good.

Description

Technical Field

[0001] The invention relates to the technical field of a PTA chain conveyor device in a polyester production device, and in particular to a PTA chain debonding alarm and shutdown device. Background Art

[0002] In polyester production, PTA, as one of the important raw materials, needs to be supplied continuously. Whether it is bag-packed PTA raw materials or tank truck-loaded PTA raw materials, they need to be transported from a low place to the top of the PTA silo at a higher position through a chain conveyor, and finally stored in the PTA silo for production use. As a key PTA material conveying equipment, the PTA chain conveyor device has been in long-term production operation. Due to the long continuous operation time of production, the large height span of the device, the inconvenient maintenance and repair, the high temperature of PTA material, the bag-packed PTA feeding is easy to bring in a lot of foreign objects such as rope heads, and the aging and wear of the plate pieces due to long-term use, the chain plate cannot rotate normally after the chain is decoupled, while the bottom feed port is still feeding normally, causing the top motor to drive the octagonal gear to continue to rotate, which will drive the chain plate plate to deviate from the running track. If it is not discovered in time and stopped for maintenance, it is very easy to cause the chain to break and the motor bearing to wear due to the blockage of PTA in the chain conveyor pipeline. This situation is difficult to repair and takes a long time. Once the damage occurs, the PTA silo often cannot be restored after the material in it is consumed, which results in the inability to continue production. This reduces the production load and causes fluctuations in the product quality of the polyester device, resulting in economic losses. Therefore, it is particularly important to design a device that can promptly alarm and shut down the PTA chain conveyor when the chain is disengaged. Summary of the invention

[0003] In order to solve some or certain technical problems existing in the prior art, the purpose of the present application is to provide a PTA chain plate chain debonding alarm and shutdown device, which can solve the problem that the conveying chain of PTA raw materials cannot be discovered and shut down in time during the process of being transported to the PTA silo through the chain plate conveyor device, thereby ensuring the operating stability and integrity of the conveying device, making maintenance more convenient and timely, and improving production stability.

[0004] In order to solve the above existing technical problems, this application adopts the following technical solutions:

[0005] A PTA chain plate chain derailment alarm shutdown device comprises a conveying pipeline, a control motor arranged on the outer side of the upper end of the conveying pipeline, a chain plate arranged in the conveying pipeline and connected in series through a chain, and an octagonal gear penetrating the conveying pipeline, wherein the chain is meshed with the octagonal gear, and the octagonal gear is driven to rotate by the control motor. A derailment alarm mechanism is arranged on the inner side of the top of the conveying pipeline, and a derailment shutdown control mechanism for controlling the shutdown of the conveying device is also arranged on the outer side of the conveying pipeline. An interlocking switch is arranged between the derailment shutdown control mechanism and the derailment alarm mechanism, and the derailment alarm mechanism is used to monitor the meshing of the chain and the octagonal gear in real time. When the chain and the octagonal gear are derailed, the interlocking switch is triggered to disconnect by the derailment alarm mechanism, thereby controlling the derailment shutdown control mechanism to shut down the conveying device and send out an alarm signal.

[0006] Preferably, the chain-off alarm mechanism includes a rotating bracket laterally arranged in the conveying pipeline, trigger branches symmetrically arranged at both ends of the rotating bracket, and an alarm light arranged on the outside of the conveying pipeline. The rotating bracket and the trigger branch are combined to form a U-shaped groove, and the U-shaped groove surrounds the chain plate without contacting it. After the chain is off, the chain plate that tilts over contacts the trigger branch and drives the trigger branch to rotate along the rotating bracket. The interlock switch is controlled to be disconnected through the rotating bracket, so that the alarm light sends out an alarm.

[0007] Preferably, the interlock switch includes a screw rod that is transversely penetrated on the conveying pipe, a sensor plate provided at one end of the screw rod, and a non-contact electromagnetic proximity switch provided on the outside of the conveying pipe and cooperates with the sensor plate. The rotating bracket is provided on the screw rod, and the alarm light and the chain-off shutdown control mechanism are controlled by the non-contact electromagnetic proximity switch.

[0008] Preferably, the chain-off shutdown control mechanism includes a controller and an emergency stop button arranged on the controller, and a signal line of the emergency stop button is connected in series with a signal line of the interlock switch.

[0009] Preferably, the rotating bracket and the trigger branch pipe are both composed of hollow square tubes, and the rotating bracket and the trigger branch pipe are connected and fixed at 90 degrees.

[0010] Preferably, at least two positioning screws are provided on the rotating bracket, and the rotating bracket is fixed to the screw rod by the positioning screws.

[0011] Preferably, a fixed angle iron is provided on the conveying pipeline, and the non-contact electromagnetic proximity switch is installed on the fixed angle iron.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The chain-off alarm mechanism and the chain-off shutdown control mechanism can monitor the chain-off phenomenon between the conveying chain and the octagonal gear of the PTA chain conveyor in real time. When a chain-off problem is found, the chain-off alarm mechanism can control the interlock switch to be disconnected, thereby triggering the chain-off alarm machine to sound an alarm and controlling the chain-off shutdown control mechanism to perform an emergency shutdown of the device, thereby achieving the purpose of timely discovery and shutdown maintenance, avoiding the chain-off conveyor pipeline being blocked by PTA, causing chain breakage and motor bearing wear, and providing a strong guarantee for the stability of PTA transportation and polyester production; making the maintenance difficulty of the entire conveying device low and the efficiency high, and the feeding stability is effectively guaranteed, thereby stabilizing production and ensuring the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] In the figure: 1. chain plate; 2. chain; 3. conveying pipeline; 4. octagonal gear; 5. control motor; 6. chain-off alarm mechanism; 61. trigger branch pipe; 62. rotating bracket; 63. positioning screw; 64. U-shaped groove; 65. alarm light; 7. fixed angle iron; 8. interlock switch; 9. chain-off shutdown control mechanism; 81. non-contact electromagnetic proximity switch; 82. induction sheet; 83. screw; 91. emergency stop button; 92. controller. DETAILED DESCRIPTION

[0016] Below, the present application is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0017] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0018] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0019] like Figure 1 As shown, a PTA chain plate 1 chain 2 chain off alarm shutdown device comprises a conveying pipeline 3, a control motor 5 arranged on the outer side of the upper end of the conveying pipeline 3, a chain plate 1 arranged in the conveying pipeline 3 and connected in series through the chain 2, and an octagonal gear 4 arranged through the conveying pipeline 3, the chain 2 is meshed with the octagonal gear 4, and the octagonal gear 4 is driven to rotate by the control motor 5. A chain off alarm mechanism 6 is provided on the inner side of the top of the conveying pipeline 3, and a chain off shutdown control mechanism 9 for controlling the shutdown of the conveying device is also provided on the outer side of the conveying pipeline 3. An interlocking switch 8 is provided between the chain off shutdown control mechanism 9 and the chain off alarm mechanism 6. The chain off alarm mechanism 6 is used to monitor the meshing of the chain 2 and the octagonal gear 4 in real time. When the chain 2 and the octagonal gear 4 are off chain, the interlocking switch 8 is triggered to disconnect by the chain off alarm mechanism 6, thereby controlling the chain off shutdown control mechanism 9 to shut down the conveying device and send out an alarm signal.

[0020] In the actual assembly process, the chain-off alarm mechanism 6 is installed in the conveying pipe 3 at the top square discharge port of the PTA chain plate 1 conveying device, so that the minimum distance between the chain-off alarm mechanism 6 and the surrounding chain plate 1 is controlled to be 1-2 cm. Then, an interlock switch 8 triggered by the chain-off alarm mechanism 6 is installed on the outside of the conveying pipe 3, and the interlock switch 8 is connected in series with the chain-off shutdown control mechanism 9. After the chain plate 1 is decoupled, the chain 2 cannot mesh with the gear when passing through the octagonal gear 4, causing the chain 2 to fall off the gear. At this time, the position of the rear chain plate 1 is displaced to the left or right, triggering the decoupled alarm mechanism 6. The decoupled alarm mechanism 6 drives the interlocking switch 8 to be disconnected, triggering the decoupled alarm machine to sound an alarm, and the interlocking switch 8 transmits the signal to the control cabinet for emergency shutdown. After the decoupled phenomenon of the chain 2 is monitored in real time by the decoupled alarm mechanism 6 and the decoupled shutdown control mechanism 9, the decoupled problem can be discovered in time. When decoupled, it can be discovered in time and shut down for maintenance, thereby avoiding the chain plate 1 conveying device pipeline being blocked by PTA, causing the chain 2 to break and the motor bearing to wear, so that the maintenance difficulty of the entire conveying device is low and the efficiency is high, and the feeding stability is effectively guaranteed, thereby stabilizing the production and ensuring the stability of product quality.

[0021] A further improvement is that the chain-off alarm mechanism 6 includes a rotating bracket 62 horizontally arranged in the conveying pipeline 3, trigger branches 61 symmetrically arranged at both ends of the rotating bracket 62, and an alarm light 65 arranged on the outside of the conveying pipeline 3. The rotating bracket 62 and the trigger branch pipe 61 are combined to form a U-shaped groove 64, and the U-shaped groove 64 surrounds the chain plate 1 without contacting it. The chain plate 1 that tilts after chain off contacts the trigger branch pipe 61 and drives the trigger branch pipe 61 to rotate along the rotating bracket 62. The interlock switch 8 is controlled to be disconnected through the rotating bracket 62, so that the alarm light 65 issues an alarm.

[0022] When there are debris on the chain 2 or the chain plate 1 is broken and falls off, the chain 2 cannot mesh with the gear when passing through the octagonal gear 4, causing the chain 2 to slip off the gear. At this time, the position of the rear chain plate 1 moves to the left or right, and when passing through the two trigger branch pipes 61 on both sides of the inverted U-shaped groove 64, it hits and drives the two trigger branch pipes 61 to shift in a fan-shaped manner along the rotation direction of the chain plate 1. The fan-shaped rotation of the trigger branch pipe 61 drives the top rotating bracket 62 to rotate, thereby controlling the interlock switch 8 to disconnect and transmit the signal to the control cabinet for emergency shutdown and alarm control system, triggering the alarm system to send an alarm signal to the alarm light 65 and control the chain off shutdown control mechanism 9 to shut down the equipment.

[0023] A further improvement is that the interlock switch 8 includes a screw 83 that is transversely penetrated on the conveying pipe 3, a sensor plate 82 that is arranged at one end of the screw 83, and a non-contact electromagnetic proximity switch 81 that is arranged on the outside of the conveying pipe 3 and cooperates with the sensor plate 82. The rotating bracket 62 is arranged on the screw 83, and the alarm light 65 and the chain-off shutdown control mechanism 9 are controlled by the non-contact electromagnetic proximity switch 81.

[0024] The rotating bracket 62 is installed on the screw 83. When the rotating bracket 62 rotates, it can synchronously drive the screw 83 to rotate, thereby driving the position of the induction plate 82 installed on the exposed end of the screw 83 to rotate and shift. When it is away from the non-contact electromagnetic proximity switch 81, the magnetic field induction intensity is weakened or disappears, and the contact state of the non-contact electromagnetic proximity switch 81 changes, triggering the off-chain alarm mechanism 6 to send an alarm signal and control the off-chain shutdown control mechanism 9 to perform shutdown processing.

[0025] As a further improvement, the chain-off shutdown control mechanism 9 includes a controller 92 and an emergency stop button 91 arranged on the controller 92 , and a signal line of the emergency stop button 91 is connected in series with a signal line of the interlock switch 8 .

[0026] The controller 92 has a system-built emergency stop control system. Currently, after a problem is discovered, emergency shutdown can only be achieved by manually starting the emergency stop button 91, which has low accuracy. Therefore, the signal line of the emergency stop button 91 is connected in series with the signal line of the interlock switch 8. Under normal circumstances, the circuit is unobstructed. However, when the signal of the interlock switch 8 is disconnected due to the off-chain alarm mechanism 6, automatic and rapid shutdown can be achieved, thereby avoiding problems caused by untimely shutdown. At the same time, when emergency shutdown is required due to other problems, it can also be controlled by the original emergency stop button 91, which is more flexible to use for different emergency stop requirements of the entire device.

[0027] As a further improvement, the rotating bracket 62 and the trigger branch pipe 61 are both composed of hollow square tubes, and the rotating bracket 62 and the trigger branch pipe 61 are connected and fixed at 90 degrees.

[0028] The materials are common and the structure is relatively simple, easy to manufacture and low in cost; the rotating bracket 62 and the trigger branch pipe 61 are both composed of hollow square tubes, the size of which can be selected according to the size of the chain plate 1 conveying device, and the selection is more diverse; the overall weight is light but the surface area is large, and it is easy to trigger.

[0029] As a further improvement, at least two positioning screws 63 are provided on the rotating bracket 62 , and the rotating bracket 62 and the screw rod 83 are fixed by the positioning screws 63 .

[0030] The rotating bracket 62 and the internal transverse screw 83 are fixed with two positioning screws 63. When the external induction sheet 82 and the non-contact electromagnetic proximity switch 81 are installed in place, the relative position of the trigger branch pipe 61 in the chain-off alarm mechanism 6 can still be adjusted arbitrarily, so that its angle matches the running angle of the chain plate 1, and the installation and use difficulties are relatively small. In particular, when the chain-off alarm mechanism 6 is triggered and then restored, it only needs to loosen the positioning screw 63, rotate the screw 83 to the initial position, and then tighten the positioning screw 63 to restore the chain-off alarm mechanism 6 to a normal working state, with a high reuse rate and low difficulty in recovery after the alarm is triggered.

[0031] A further improvement is that a fixed angle iron 7 is provided on the conveying pipeline 3 , and the non-contact electromagnetic proximity switch 81 is installed on the fixed angle iron 7 .

[0032] The non-contact electromagnetic proximity switch 81 is installed on the outside of the conveying pipe 3 through the fixed angle iron 7. It has a simpler structure, is easier to manufacture, and has a flexible installation position. It can be welded or detachably connected according to different environmental requirements.

[0033] The above-mentioned implementation modes are only preferred implementation modes of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present application shall fall within the scope of protection required by the present application.

Claims

1. A PTA chain plate chain derailment alarm shutdown device, comprising a conveying pipeline (3), a control motor (5) arranged outside the upper end of the conveying pipeline (3), a chain plate (1) arranged in the conveying pipeline (3) and connected in series through a chain (2), and an octagonal gear (4) penetrating the conveying pipeline (3), wherein the chain (2) is meshed with the octagonal gear (4), and the octagonal gear (4) is driven to rotate by the control motor (5), characterized in that: A chain-off alarm mechanism (6) is provided on the inner side of the top of the conveying pipeline (3), and a chain-off stop control mechanism (9) for controlling the stop of the conveying device is also provided on the outer side of the conveying pipeline (3). An interlocking switch (8) is provided between the chain-off stop control mechanism (9) and the chain-off alarm mechanism (6). The chain-off alarm mechanism (6) is used to monitor the meshing of the chain (2) and the octagonal gear (4) in real time. When the chain (2) and the octagonal gear (4) are off-chain, the chain-off alarm mechanism (6) triggers the interlocking switch (8) to disconnect, thereby controlling the chain-off stop control mechanism (9) to stop the conveying device and send out an alarm signal.

2. A PTA chain plate chain derailment alarm and shutdown device according to claim 1, characterized in that: The chain-off alarm mechanism (6) comprises a rotating bracket (62) arranged transversely in the conveying pipeline (3), trigger branches (61) symmetrically arranged at both ends of the rotating bracket (62), and an alarm light (65) arranged outside the conveying pipeline (3). The rotating bracket (62) and the trigger branch (61) are combined to form a U-shaped groove (64). The U-shaped groove (64) surrounds the chain plate (1) without contacting it. After the chain is off, the chain plate (1) that is tilted contacts the trigger branch (61) and drives the trigger branch (61) to rotate along the rotating bracket (62). The interlock switch (8) is controlled to be disconnected through the rotating bracket (62), so that the alarm light (65) sends out an alarm.

3. A PTA chain plate chain derailment alarm and shutdown device according to claim 2, characterized in that: The interlock switch (8) comprises a screw rod (83) which is transversely passed through the conveying pipe (3), a sensing sheet (82) provided at one end of the screw rod (83), and a non-contact electromagnetic proximity switch (81) provided on the outer side of the conveying pipe (3) and cooperating with the sensing sheet (82); the rotating bracket (62) is provided on the screw rod (83); and the warning light (65) and the chain-off stop control mechanism (9) are controlled by the non-contact electromagnetic proximity switch (81).

4. A PTA chain plate chain derailment alarm and shutdown device according to claim 3, characterized in that: The chain-off shutdown control mechanism (9) comprises a controller (92) and an emergency stop button (91) arranged on the controller (92), wherein a signal line of the emergency stop button (91) is connected in series with a signal line of the interlock switch (8).

5. A PTA chain plate chain derailment alarm and shutdown device according to claim 3, characterized in that: The rotating bracket (62) and the trigger branch pipe (61) are both composed of hollow square tubes, and the rotating bracket (62) and the trigger branch pipe (61) are connected and fixed at 90 degrees.

6. A PTA chain plate chain derailment alarm and shutdown device according to claim 5, characterized in that: At least two positioning screws (63) are provided on the rotating bracket (62), and the rotating bracket (62) and the screw rod (83) are fixed by the positioning screws (63).

7. A PTA chain plate chain derailment alarm and shutdown device according to claim 6, characterized in that: A fixed angle iron (7) is provided on the conveying pipeline (3), and the non-contact electromagnetic proximity switch (81) is installed on the fixed angle iron (7).

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