A double-safety positioning control system for the movable rack of a bar cooling bed

Abstract

The present invention discloses a double-safety positioning control system for a bar cooling bed moving rack, which relates to automatic control technology. It comprises a first sensing stop, a first stop position proximity switch, a first deceleration position proximity switch, a second sensing stop, a second stop position proximity switch, a second deceleration position proximity switch and a controller; wherein the controller is used to collect electrical signals from the above four proximity switches; if the controller collects the electrical signal from the first stop position proximity switch, the moving rack is controlled to work in the original motion cycle; if the controller does not collect the electrical signal from the first stop position proximity switch, but collects the electrical signal from the second stop position proximity switch, the moving rack is controlled to work in a delayed motion cycle that lags behind the original motion cycle. The present invention will not cause the moving rack to fail to stop or stop in an incorrect position due to occasional failure of the moving rack stop position proximity switch signal, thereby ensuring smooth production and significant effects.

Description

Technical Field

[0001] The present invention relates to automatic control technology, and more particularly to a double-insurance positioning control system for a movable rack of a bar cooling bed. Background Art

[0002] During normal production, one cycle of the cooling bed moving rack is a circular motion, that is, the moving rack rotates clockwise from the high position for one circle and stops moving when it returns to the high position. When the next action command is received, the cooling bed moving rack runs another cycle, and so on.

[0003] like Figure 1 As shown in the figure, the positioning of the cooling bed's moving rack is controlled by a stop position proximity switch and a deceleration position proximity switch. In terms of installation position, the stop position proximity switch is installed in the high position, and the deceleration position proximity switch is installed in the low position. When the moving rack receives the start command, it begins to run clockwise from the high position. When the moving rack reaches the low position, that is, when the deceleration position proximity switch receives a signal, the moving rack's speed is reduced to half of its original speed. The purpose of deceleration is to reduce inertia at a lower speed when stopped, and the specific speed value can be modified at any time. When the moving rack reaches the high position at a low speed, that is, when the stop position proximity switch receives a signal, the moving rack stops, completing this cycle of motion, and awaiting the next action command.

[0004] However, due to the complex working conditions and harsh environment, the stop position proximity switch signal occasionally fails, resulting in the loss of the stop position signal during the operation of the moving rack, the moving rack cannot stop or the stop position is incorrect, causing production interruption. Therefore, in order to better solve the problem of accurate positioning of the cooling bed moving rack, it is necessary to study a double insurance positioning control system for the bar cooling bed moving rack to solve this problem. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the existing technology and provide a double-insurance positioning control system for the movable rack of a bar cooling bed, which solves the problem in the existing technology that if the stop position proximity switch signal fails, the signal is lost, resulting in the movable rack being unable to stop or the stop position being incorrect, affecting production.

[0006] The double-safety positioning control system for the movable rack of a bar cooling bed of the present invention comprises:

[0007] The first induction stopper is installed on the long axis of the moving tooth of the moving rack;

[0008] A first stop position proximity switch is provided at a high position of the rotating track of the movable rack and corresponds to the position of the first induction stop;

[0009] The first deceleration position proximity switch is arranged at the lower position of the rotating track of the movable rack and corresponds to the position of the first induction stop iron;

[0010] Also includes,

[0011] A second induction stop iron is installed on the long axis of the movable tooth on one side of the first induction stop iron;

[0012] The second stop position proximity switch is set at the high position of the rotating track of the movable rack, but its triggering time lags behind the triggering time of the first stop position proximity switch; and it corresponds to the position of the second induction stop iron;

[0013] The second deceleration position proximity switch is set at the lower position of the rotating track of the movable rack, but its triggering time lags behind the triggering time of the first deceleration position proximity switch; and corresponds to the position of the second induction stop iron;

[0014] A controller is used to collect electrical signals from the first stop position proximity switch, the first deceleration position proximity switch, the second stop position proximity switch and the second deceleration position proximity switch; if the controller collects the electrical signal from the first stop position proximity switch, the movable rack is controlled to operate with an original motion cycle; if the controller does not collect the electrical signal from the first stop position proximity switch but collects the electrical signal from the second stop position proximity switch, the movable rack is controlled to operate with a delayed motion cycle that lags behind the original motion cycle.

[0015] If the controller collects the electrical signal of the first stop position proximity switch, but does not collect the electrical signal of the second stop position proximity switch and / or the second deceleration position proximity switch, the controller sends a pre-failure alarm signal.

[0016] If the controller does not collect the electrical signal of the first deceleration position proximity switch when the movable rack operates in the original motion cycle, but collects the electrical signal of the second deceleration position proximity switch, the controller controls the movable rack to operate in the delayed motion cycle.

[0017] When the controller controls the working state of the movable rack to change, the controller sends a pre-failure alarm signal.

[0018] In the hysteresis motion cycle, the controller uses the electrical signal of the second deceleration position proximity switch as the low-position trigger signal.

[0019] A lag time is set according to the motion cycle of the movable rack; when the movable rack works with the lag motion cycle, after the controller collects the electrical signal of the first deceleration position proximity switch, the controller starts timing; if the controller does not collect the electrical signal of the second deceleration position proximity switch after the timing ends, the controller controls the movable rack to enter the deceleration position motion state.

[0020] The second stop position proximity switch is arranged on a high side of the rotating track of the movable rack; the second deceleration position proximity switch is arranged on a low side of the rotating track of the movable rack.

[0021] Beneficial effects

[0022] The advantages of the present invention are as follows: based on the original system, the present invention adds a second stop position proximity switch and a second deceleration position proximity switch whose triggering time lags behind the original first stop position proximity switch and the first deceleration position proximity switch of the system, so that the system has a hysteresis motion cycle. When the original proximity switch of the system fails, the added proximity switch can still ensure the normal operation of the system, and the situation where the moving rack cannot stop or the stop position is incorrect due to occasional failure of the moving rack stop position proximity switch signal will not occur, thereby ensuring stable production and significant results. In addition, the present invention adopts the staggered installation method of the proximity switches used in similar applications and uses an active hysteresis working method to avoid the problem of uneven system operation caused by the lag of one of the proximity switch signals when the proximity switches are installed on the same plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the opposite side of the long axis of the movable tooth in the prior art;

[0024] Figure 2 This is a schematic side view of the long axis of the movable gear of the present invention;

[0025] Figure 3 This is a schematic diagram of the opposite side of the long axis of the movable tooth of the present invention.

[0026] Among them: 1-long shaft of movable gear, 2-first induction stop iron, 3-first stop position proximity switch, 4-first deceleration position proximity switch, 5-second stop position proximity switch, 6-second deceleration position proximity switch, 7-second induction stop iron. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0028] See Figure 2-Figure 3 The present invention provides a dual-safety positioning control system for a bar cooling bed movable rack, comprising a first sensing stop 2, a first stop position proximity switch 3, a first deceleration position proximity switch 4, a second sensing stop 7, a second stop position proximity switch 5, a second deceleration position proximity switch 6, and a controller. The first sensing stop 2 and the second sensing stop 7 are both fixedly mounted on the movable tooth major axis 1 of the movable rack, with a certain spacing between the two sensing stops, and the two sensing stops have the same planar position and shape.

[0029] The first stop position proximity switch 3 is located at a high position along the rotating track of the moving rack, corresponding to the position of the first sensing stop 2. The first deceleration position proximity switch 4 is located at a low position along the rotating track of the moving rack, corresponding to the position of the first sensing stop 2. In other words, the installation positions of the first stop position proximity switch 3 and the first deceleration position proximity switch 4 are consistent with those of stop position proximity switches and deceleration position proximity switches in the prior art.

[0030] For the high and low positions involved in this article, such as Figure 1 As shown, when viewed from the direction facing the movable gear major axis 1, the stop position proximity switch is directly above the movable gear major axis 1, and the deceleration position proximity switch is directly below the movable gear major axis 1. Figure 1 In the example, the movable rack's long shaft 1 rotates clockwise, driving the inductive stop. When the stop position proximity switch or the deceleration position proximity switch detects the stop, an electrical signal is sent to the controller, which then stops or decelerates the movable rack based on this signal. Specifically, when the movable rack receives a start command, it begins moving clockwise from the high position. When it reaches the low position, the deceleration position proximity switch activates, reducing the movable rack's speed to half its original value. When the stop position proximity switch activates, the movable rack stops, completing one cycle of motion and awaiting the next motion command. This process constitutes the original motion cycle of the movable rack.

[0031] The second stop position proximity switch 5 of this embodiment is set at the high position of the rotating track of the moving rack, corresponding to the position of the second induction stop iron 7. And the second stop position proximity switch 5 is set on one side of the high position of the rotating track of the moving rack. Figure 3 As shown, with clockwise being the rotation direction of the movable gear major axis 1, the second stop position proximity switch 5 is located on the right side of the high position. By such an arrangement, the triggering time of the second stop position proximity switch 5 can be delayed after the triggering time of the first stop position proximity switch 3.

[0032] The second deceleration position proximity switch 6 is set at the lower position of the rotating track of the moving rack, corresponding to the position of the second induction stop 7. The second deceleration position proximity switch 6 is set on one side of the lower position of the rotating track of the moving rack. Figure 3 As shown, with the clockwise rotation direction of the movable gear major shaft 1, the second deceleration position proximity switch 6 is located on the left side of the low position, so that its triggering time also lags behind the triggering time of the first deceleration position proximity switch 4. In addition, the angle between the second stop position proximity switch 5 and the second deceleration position proximity switch 6 is consistent with the angle between the first stop position proximity switch 3 and the first deceleration position proximity switch 4, ensuring that the control amounts of the two sets of proximity switches are consistent.

[0033] The controller is used to collect electrical signals from the first stop position proximity switch 3, the first deceleration position proximity switch 4, the second stop position proximity switch 5, and the second deceleration position proximity switch 6. It then controls the operation of the moving rack based on the collected electrical signals. The specific control process is as follows.

[0034] When the movable rack starts operating, the controller controls the movement of the movable rack using the existing control program. That is, the movable rack operates at its original motion cycle. During the operation of the movable rack, when the first sensing stop 2 rotates to the position corresponding to the first stop proximity switch 3, the first stop proximity switch 3 will emit an electrical signal. If the controller detects the electrical signal from the first stop proximity switch 3, it will control the movable rack to operate at its original motion cycle.

[0035] During the above process, if the controller does not detect an electrical signal from the first deceleration position proximity switch 4 while the movable rack is operating in its original motion cycle, but detects an electrical signal from the second deceleration position proximity switch 6, the controller will control the movable rack to operate in a delayed motion cycle. That is, if both stop position proximity switches are normal, and the second deceleration position proximity switch 6 is also normal, but the first deceleration position proximity switch 4 is faulty, the movable rack can be switched to a delayed motion cycle to allow it to continue operating, while simultaneously issuing a pre-failure alarm signal.

[0036] When the system is working, if the first stop position proximity switch 3 fails, that is, if the controller does not collect the electrical signal of the first stop position proximity switch 3, but collects the electrical signal of the second stop position proximity switch 5, the controller controls the brake rack to operate with a delayed motion cycle that lags behind the original motion cycle.

[0037] Furthermore, considering the issue of abnormal operating conditions causing malfunction of the second deceleration position proximity switch 6 during the hysteresis motion cycle, this embodiment sets a hysteresis time based on the motion cycle of the movable rack. When the movable rack operates in the hysteresis motion cycle, the controller starts timing after receiving an electrical signal from the first deceleration position proximity switch 4. If the controller does not receive an electrical signal from the second deceleration position proximity switch 6 after the timing ends, the controller controls the movable rack to enter the deceleration position. This effectively prevents the movable rack major shaft 1 from being unable to decelerate, ensuring the safety of system operation.

[0038] Regarding the hysteresis motion cycle in this embodiment, the electrical signals emitted by the second stop position proximity switch 5 and the second deceleration position proximity switch 6 replace the electrical signals of the first stop position proximity switch 3 and the first deceleration position proximity switch 4 in the original control program, so that the controller controls the movement of the movable rack according to the electrical signals emitted by the second stop position proximity switch 5 and the second deceleration position proximity switch 6.

[0039] Preferably, during the operation of the system, if the controller does not collect any of the electrical signals of the first stop position proximity switch 3, the first deceleration position proximity switch 4, the second stop position proximity switch 5, and the second deceleration position proximity switch 6, the controller will issue a pre-fault alarm signal to remind on-site staff to carry out timely maintenance.

[0040] The present invention adds a second stop position proximity switch 5 and a second deceleration position proximity switch 6 on the basis of the original system, whose triggering time lags behind the original first stop position proximity switch 3 and the first deceleration position proximity switch 4 of the system, so that the system has a hysteresis motion cycle. When the original proximity switch of the system fails, the added proximity switch can also ensure the normal operation of the system, and will not cause the moving rack to fail to stop or stop in an incorrect position due to occasional failure of the moving rack stop position proximity switch signal, thereby ensuring smooth production and significant effect. Moreover, compared with the method of installing the first stop position proximity switch 3 and the second stop position proximity switch 5, and the first deceleration position proximity switch 4 and the second deceleration position proximity switch 6 in the same plane, that is, adopting a control method of two similar application proximity switches, the present invention adopts a staggered installation method of similar application proximity switches through an active hysteresis working method, thereby avoiding the problem of uneven system operation due to the lag of one of the proximity switch signals when the proximity switches are installed in the same plane.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A dual-insurance positioning control system for a bar cooling bed movable rack, comprising: A first induction stopper (2) is mounted on the movable tooth long axis (1) of the movable rack; A first stop position proximity switch (3) is arranged at a high position of the rotating track of the movable rack and corresponds to the position of the first induction stop iron (2); A first deceleration position proximity switch (4) is arranged at a low position of the rotating track of the movable rack and corresponds to the position of the first induction stop (2); It is characterized by also including: A second induction stopper (7) is mounted on the movable tooth long shaft (1) on one side of the first induction stopper (2); The second stop position proximity switch (5) is set at a high position of the rotating track of the movable rack, but its triggering time lags behind the triggering time of the first stop position proximity switch (3); and it corresponds to the position of the second induction stop iron (7); The second deceleration position proximity switch (6) is arranged at a low position of the rotating track of the movable rack, but its triggering time lags behind the triggering time of the first deceleration position proximity switch (4); and corresponds to the position of the second induction stop iron (7); A controller for collecting electrical signals from the first stop position proximity switch (3), the first deceleration position proximity switch (4), the second stop position proximity switch (5) and the second deceleration position proximity switch (6); If the controller collects the electrical signal of the first stop position proximity switch (3), the movable rack is controlled to operate in an original motion cycle; if the controller does not collect the electrical signal of the first stop position proximity switch (3) but collects the electrical signal of the second stop position proximity switch (5), the movable rack is controlled to operate in a delayed motion cycle that lags behind the original motion cycle.

2. The double insurance positioning control system for the movable rack of a bar cooling bed according to claim 1 is characterized in that: If the controller collects the electrical signal of the first stop position proximity switch (3), but does not collect the electrical signal of the second stop position proximity switch (5) and / or the second deceleration position proximity switch (6), the controller sends a pre-failure alarm signal.

3. The double insurance positioning control system for the movable rack of a bar cooling bed according to claim 1 is characterized in that: If the controller does not collect the electrical signal of the first deceleration position proximity switch (4) when the movable rack is operating in the original motion cycle, but collects the electrical signal of the second deceleration position proximity switch (6), the controller controls the movable rack to operate in the delayed motion cycle.

4. The double insurance positioning control system for the movable rack of a bar cooling bed according to claim 1 is characterized in that: When the controller controls the working state of the movable rack to change, the controller sends a pre-failure alarm signal.

5. The double insurance positioning control system for the movable rack of a bar cooling bed according to claim 1 is characterized in that: In the hysteresis motion cycle, the controller uses the electrical signal of the second deceleration position proximity switch (6) as a low-position trigger signal.

6. The double insurance positioning control system for the movable rack of a bar cooling bed according to claim 1 is characterized in that: A hysteresis time is set according to the motion cycle of the movable rack; when the movable rack works with the hysteresis motion cycle, after the controller collects the electrical signal of the first deceleration position proximity switch (4), the controller starts timing; if the controller does not collect the electrical signal of the second deceleration position proximity switch (6) after the timing ends, the controller controls the movable rack to enter the deceleration position motion state.

7. A dual-safety positioning control system for a bar cooling bed movable rack according to any one of claims 1 to 6, characterized in that: The second stop position proximity switch (5) is arranged on a high side of the rotating track of the movable rack; and the second deceleration position proximity switch (6) is arranged on a low side of the rotating track of the movable rack.

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