A protection device for a proximity switch of a pallet transport system

Abstract

The application discloses a protection device for a proximity switch of a tray type transportation system, which comprises a protection cover assembly and an air cooling assembly. The protection cover assembly comprises at least one protection cover body, the protection cover body is connected with a ventilation pipe, the ventilation pipe is connected with a rotating shaft, the left end of the rotating shaft is rotatably connected with a rotating shaft support I through a shaft sleeve, the right end of the rotating shaft is rotatably connected with a rotating shaft support II through a shaft sleeve, and the rotating shaft support I and the rotating shaft support II are both connected with the outer side of a supporting beam. The air cooling assembly comprises a gas conveying pipe, the outlet end of the gas conveying pipe is rotatably connected with the port of the right end of the rotating shaft, the other end of the gas conveying pipe is connected with an electromagnetic valve, and the gas conveying pipe is connected with the outer side of the supporting beam through a support. The protection device can effectively protect the proximity switch in the transportation system from high temperature during the process of conveying steel rolls by the tray, simultaneously performs air cooling on the proximity switch, guarantees the normal operation of the equipment, promotes the safety production, and improves the production efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of metallurgical transportation equipment maintenance, and particularly relates to a protection device for a proximity switch of a pallet type transportation system. BACKGROUND

[0002] After hot-rolled strip steel is coiled, it needs to be transported to a finished product warehouse or the next process by a coil transportation device. Compared with the traditional step beam and fast transportation chain mode, the pallet type coil transportation system has many advantages such as light weight, stable operation, convenient equipment maintenance, energy saving and environmental protection, and thus is applied more and more at home and abroad. At present, the pallet type coil transportation system is adopted in many newly built hot continuous rolling projects in China, and good application effects have been achieved.

[0003] The pallet type transportation system is mainly composed of a pallet and a transportation roller bed. The transportation roller bed is the main equipment of the pallet type transportation line and is composed of a roller group, a detection limit, a chain group and a roller bed motor. The roller group is composed of multiple rollers, each of which is provided with a chain wheel and a roller. The roller bed motor drives the middle roller to rotate, and the middle roller drives the chain group to drive the whole roller group to rotate through the chain wheel. With the rotation of the roller, the pallet moves on the roller group. In order to ensure the safety of transportation and the needs of operation, proximity switches are generally used to detect the position of the pallet, so as to adjust the operation of the roller group. Generally, three proximity switches are provided for each roller group: a roller bed entrance proximity switch, a roller bed deceleration proximity switch and a roller bed exit proximity switch. The roller bed entrance proximity switch is used to determine the position of the head of the pallet and trigger the tracking movement of the pallet. The roller bed deceleration proximity switch is used to determine whether the next roller group is occupied by the pallet. If the next roller group is occupied by the pallet, the roller group motor starts to decelerate to 10% of full speed. If the next roller group is not occupied by the pallet, the next roller group is triggered to rotate at full speed to prepare for transporting the pallet. The roller bed exit proximity switch is used to determine whether the next roller group is occupied by the pallet or the current roller group is a special function roller group (such as steel coil number spraying, weighing or coil shape repair, etc.). If the next roller group is occupied by the pallet or the current roller group is a special function roller group, the speed of the current roller group is reduced from 10% of full speed to 0 speed output. If the next roller group is not occupied by the pallet, the current roller group is stopped.

[0004] Since the temperature of the steel coil carried by the pallet is very high, the temperature of the on-site environment is high, and the proximity switch is in a high-temperature environment for a long time, which may cause misoperation or damage of the proximity switch, thereby affecting the normal production. In general, a cooling fan is used to blow air to the proximity switch for heat dissipation, but the effect is not good. The main reason is that the overall temperature of the on-site environment is high and the range is large, and the effect of air cooling is not obvious. SUMMARY

[0005] I. Technical problems to be solved

[0006] The application provides a protection device for a proximity switch of a pallet transportation system, which aims to solve the problem that the proximity switch is easily disabled or damaged due to high temperature during the process of conveying a steel coil by the pallet transportation system.

[0007] II. Technical solutions

[0008] In order to achieve the above-mentioned purpose, the application adopts the following technical solutions, comprising:

[0009] The proximity switch is located between adjacent conveying rollers and connected to the inner side of the supporting beam; the protection device further comprises a protection cover assembly and an air cooling assembly; the protection cover assembly comprises at least one protection cover body, the protection cover body is connected to an air pipe, the air pipe is connected to a rotating shaft, the rotating shaft is a hollow pipe and communicates with the air pipe, the left end of the rotating shaft is rotatably connected to a rotating shaft support I through a shaft sleeve, the right end of the rotating shaft is rotatably connected to a rotating shaft support II through a shaft sleeve, the rotating shaft support I and the rotating shaft support II are connected to the outer side of the supporting beam, the left end of the rotating shaft is fixedly connected to the inner side of one end of an arm plate I, and the right end of the rotating shaft is fixedly connected to the inner side of one end of an arm plate II.

[0010] The outer side of the other end of the arm plate I is rotatably connected to a rocker I, the other end of the rocker I is fixedly connected to one end of a crowbar I, the middle part of the crowbar I is rotatably connected to a crowbar support I through a pin shaft I, the other end of the crowbar I is fixedly connected to a U-shaped piece I, the U-shaped piece I is rotatably connected to a roller I through an axle, the outer side of the other end of the arm plate II is rotatably connected to a rocker II, the other end of the rocker II is fixedly connected to one end of a crowbar II, the middle part of the crowbar II is rotatably connected to a crowbar support II through a pin shaft II, the other end of the crowbar II is fixedly connected to a U-shaped piece II, the U-shaped piece II is rotatably connected to a roller II through an axle, and the crowbar support I and the crowbar support II are connected to the top surface of the supporting beam.

[0011] Further, the protection cover assembly further comprises a pull rod, the pull rod is connected to the outer side of the supporting beam through a support, and the end of the telescopic rod of the pull rod is connected to a U-shaped piece III, the U-shaped piece III is rotatably connected to the connecting lug at the lower part of the crowbar II through a pin shaft.

[0012] Further, the air cooling assembly comprises a gas conveying pipe, the outlet end of the gas conveying pipe is threadedly connected to an "L"-shaped adapter, the gas outlet of the adapter is rotatably connected to the port at the right end of the rotating shaft after passing through the through hole of the arm plate II, the other end of the gas conveying pipe is connected to an electromagnetic air valve, and the gas conveying pipe is connected to the outer side of the supporting beam through a support.

[0013] Further, the adapter is sleeved with a sealing ring, and the outer circle of the sealing ring is connected to the inner periphery of the through hole of the arm plate II.

[0014] Preferably, the electromagnetic air valve is electrically connected to a PLC controller.

[0015] Further, the protection cover body is provided with a nozzle connected with the outlet of the air pipe.

[0016] III. Advantages

[0017] The protection device for the proximity switch of the tray type transportation system can effectively protect the proximity switch in the transportation system from high temperature during the process of transporting the steel rolls by the tray, simultaneously performs air cooling on the proximity switch, guarantees the normal operation of the equipment, promotes the safety production, and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the protection device of the embodiment one mounted on the supporting beam.

[0019] Figure 2 is a three-dimensional structural schematic view of the protection device of the embodiment one.

[0020] Figure 3 is a structural schematic view of the protection device of the embodiment two mounted on the supporting beam.

[0021] Figure 4 is a three-dimensional structural schematic view of the protection device of the embodiment two.

[0022] Figure 5 are respectively Figure 2 the enlarged structural schematic view of the part A of Figure 4 the part B.

[0023] Figure 6 is a schematic view of the use of the embodiment one of the present application. Figure I .

[0024] Figure 7 is a schematic view of the use of the embodiment one of the present application. Figure II .

[0025] Figure 8 is a schematic view of the use of the embodiment two of the present application. Figure I .

[0026] Figure 9 is a schematic view of the use of the embodiment two of the present application. Figure II . DETAILED DESCRIPTION

[0027] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, so that those skilled in the art can have a clearer understanding.

[0028] Embodiment one

[0029] As Figure 1 , Figure 2 , Figure 5As shown, as the first embodiment of the present application, it comprises proximity switch 3 between adjacent conveying rollers 1 and connected to the inner side of support beam 2, which is the approach switch of the roller table entrance; it also comprises protective cover assembly 4, air cooling assembly 5, the protective cover assembly comprises a protective cover body 41 corresponding to the approach switch of the roller table entrance, the protective cover body is connected to air pipe 42, the air pipe is connected to rotating shaft 43 which is a hollow pipe and its inside communicates with the air pipe, the left end of the rotating shaft is rotatably connected to rotating shaft support I 44 through a shaft sleeve, the right end of the rotating shaft is rotatably connected to rotating shaft support II 44' through a shaft sleeve, the rotating shaft support I and the rotating shaft support II are both connected to the outer side of the support beam, the left end of the rotating shaft is fixedly connected to the inner side of one end of arm plate I 45, the right end of the rotating shaft is fixedly connected to the inner side of one end of arm plate II 45';

[0030] The other end of the arm plate I is rotatably connected to rocker I 46, the other end of the rocker I is fixedly connected to one end of crowbar I 47, the middle part of the crowbar I is rotatably connected to crowbar support I 49 through pin shaft I 48, the other end of the crowbar I is fixedly connected to U-shaped piece I 410, the U-shaped piece I is rotatably connected to roller I 411 through an axle, the other end of the arm plate II is rotatably connected to rocker II 46', the other end of the rocker II is fixedly connected to one end of crowbar II 47', the middle part of the crowbar II is rotatably connected to crowbar support II 49' through pin shaft II 48', the other end of the crowbar II is fixedly connected to U-shaped piece II 410', the U-shaped piece II is rotatably connected to roller II 411' through an axle, the crowbar support I and the crowbar support II are both connected to the top surface of the support beam.

[0031] Further, the protective cover assembly further comprises pull rod 412, which is connected to the outer side of the support beam through a bracket, the telescopic rod of the pull rod is connected to U-shaped piece III 413 at its end, and the U-shaped piece III is rotatably connected to the connecting lug at the lower part of the crowbar II through a pin shaft.

[0032] Further, the air cooling assembly comprises air conveying pipe 51, the outlet end of the air conveying pipe is threadedly connected to "L"-shaped adapter 52, the air outlet of the adapter is rotatably connected to the port at the right end of the rotating shaft after passing through the through hole of arm plate II, the other end of the air conveying pipe is connected to electromagnetic air valve 53, and the air conveying pipe is connected to the outer side of the support beam through a bracket.

[0033] Further, the adapter is provided with sealing ring 54, and the outer circle of the sealing ring is connected to the inner circumferential surface of the through hole of arm plate II.

[0034] Preferably, the electromagnetic air valve is electrically connected to the PLC controller.

[0035] Further, the protective cover body is provided with nozzle connected to the outlet of the air pipe.

[0036] As Figure 2, Figure 5 , Figure 6 As shown, during use, the pallet 6, carrying the steel coil 7, moves to the left under the drive of the conveyor rollers. When the base of the pallet is not pressing down on the roller Ⅱ411', the protective cover body 41 is in a fallen state. The roller conveyor inlet proximity switch is located inside the protective cover body. The electromagnetic valve 53 is opened under the control of the PLC controller, and cooling gas enters the protective cover body through the air supply pipe 51 to cool the roller conveyor inlet proximity switch; Figure 2 , Figure 5 , Figure 7 As shown, when the base of the pallet presses down on roller II 411', U-shaped part II 410' moves downward, the other end of pry bar II 47' tilts upward, rocker arm II 46' drives arm plate II 45' to swing, thereby driving shaft 43 to rotate, causing the protective cover body to lift up, allowing the pallet to pass smoothly. At the same time, the solenoid valve closes. Since the length of the pallet base is greater than the distance between roller I 411 and roller II 411', the left end of the pallet base has already pressed down on roller I 411 before the right end of the pallet base disengages from roller II 411'. Therefore, during the entire process of the pallet passing through, the protective cover body is always in a tilted state and will not obstruct the pallet's movement. After the right end of the pallet passes roller I, under the pull of pull rod 412, U-shaped part II tilts upward, rocker arm II drives arm plate II to swing back, thereby driving shaft to rotate back, the protective cover body falls down to cover the roller conveyor entrance proximity switch, and at the same time, the solenoid valve opens to air-cool the roller conveyor entrance proximity switch.

[0037] Example 2

[0038] like Figure 3 , Figure 4 , Figure 5 As shown, as a second embodiment of the present invention, its basic structure is the same as that of the first embodiment, except that it includes two proximity switches: a roller deceleration proximity switch 3' and a roller exit proximity switch 3. The roller deceleration proximity switch is located between two adjacent conveyor rollers, and the roller exit proximity switch is located between two other adjacent conveyor rollers. They are both connected to the inner side of the support beam 2. The protective cover assembly includes a protective cover body I 41 and a protective cover body II 41'. The protective cover body I corresponds to the roller exit proximity switch, and the protective cover body II corresponds to the roller deceleration proximity switch. The protective cover body I is connected to the vent pipe I 42, and the protective cover body II is connected to the vent pipe II 42'. Both the vent pipes I and II are connected to the rotating shaft 43.

[0039] like Figure 4 , Figure 5 , Figure 8As shown, in use, the tray 6 carries the steel coil 7 to move left under the drive of the conveying roller, when the base of the tray does not press the roller II 411', the protective cover body I 41 and the protective cover body II 41' are both in the falling state, the roller approach deceleration switch 3' is located in the protective cover body II, the roller exit approach switch 3 is located in the protective cover body I, the electromagnetic air valve 53 is opened under the control of the PLC controller, the cooling gas enters the protective cover body I and the protective cover body II through the gas pipe 51 respectively, and the roller exit approach switch and the roller approach deceleration switch are cooled; as shown, Figure 4 、 Figure 5 、 Figure 9 When the base of the tray presses the roller II 411', the U-shaped piece II 410' moves downward, the other end of the lever II 47' is upturned, the rocker II 46' drives the arm plate II 45' to swing, thereby driving the rotating shaft 43 to rotate and lifting the protective cover body I and the protective cover body II, so that the tray can pass smoothly, and the electromagnetic air valve is closed. Since the length of the tray base is greater than the distance between the roller I 411 and the roller II 411', the left end of the tray base has pressed the roller I 411 before the right end of the tray base is separated from the roller II 411', therefore, in the process of passing the tray as a whole, the protective cover body I and the protective cover body II are always in the lifted state, and will not cause obstacles to the tray; when the right end of the tray passes the roller I, under the pulling of the pull rod 412, the U-shaped piece II is upturned, the rocker II drives the arm plate II to swing back, thereby driving the rotating shaft to rotate back, the protective cover body I and the protective cover body II fall to cover the roller exit approach switch and the roller approach deceleration switch respectively, and the electromagnetic air valve is opened to air cool the roller exit approach switch and the roller approach deceleration switch.

[0040] The protective device for the proximity switch of the tray type conveying system can effectively protect the proximity switch in the conveying system from high temperature during the process of conveying the steel coil by the tray, and simultaneously air cools the proximity switch, thereby ensuring the normal operation of the equipment, promoting the safety production, and improving the production efficiency.

[0041] The present application is not limited to the above specific embodiments, and various improvements made by those skilled in the art to the technical solutions of the present application according to the concept of the present application shall fall within the scope of the present application.

Claims

1. A protective device for a proximity switch in a pallet transport system, comprising a proximity switch (3) located between adjacent conveyor rollers (1) and connected to the inner side of a support beam (2), characterized in that: It also includes a protective cover assembly (4) and an air-cooling assembly (5). The protective cover assembly includes at least one protective cover body (41). When the protective cover body is in a fallen state, the proximity switch (3) is located inside the protective cover body. The protective cover body is connected to a vent pipe (42). The vent pipe is connected to a rotating shaft (43). The rotating shaft is a hollow tube and its interior is connected to the vent pipe. The protective cover body is provided with a nozzle connected to the outlet of the vent pipe. The left end of the rotating shaft is rotatably connected to the rotating shaft support I (44) through a bushing. The right end of the rotating shaft is rotatably connected to the rotating shaft support II (44') through a bushing. The rotating shaft support I and the rotating shaft support II are both connected to the outer side of the support beam. The left end of the rotating shaft is fixedly connected to the inner side of one end of the arm plate I (45). The right end of the rotating shaft is fixedly connected to the inner side of one end of the arm plate II (45'). The outer side of the other end of the arm plate I is rotatably connected to rocker I (46), the other end of which is fixedly connected to one end of pry bar I (47). The middle part of pry bar I is rotatably connected to pry bar support I (49) through pin I (48). The other end of pry bar I is fixedly connected to U-shaped part I (410). The U-shaped part I is rotatably connected to roller I (411) through a wheel axle. The outer side of the other end of the arm plate II is rotatably connected to rocker II (46'). The other end of rocker II is fixedly connected to one end of pry bar II (47'). The middle part of pry bar II is rotatably connected to pry bar support II (49') through pin II (48'). The other end of pry bar II is fixedly connected to U-shaped part II (410'). The U-shaped part II is rotatably connected to roller II (411') through a wheel axle. Both pry bar support I and pry bar support II are connected to the top surface of the support beam. The air-cooled assembly includes an air supply pipe (51), the outlet end of which is threadedly connected to an "L"-shaped adapter (52). The outlet of the adapter passes through the through hole of the arm plate II and is rotatably connected to the port on the right end of the rotating shaft. The other end of the air supply pipe is connected to an electromagnetic valve (53). The air supply pipe is connected to the outer side of the support beam through a bracket.

2. The protection device for a proximity switch of a pallet conveyor system according to claim 1, characterized in that: The protective cover assembly also includes a pull rod (412), which is connected to the outer side of the support beam via a bracket. The end of the extension rod of the pull rod is connected to a U-shaped part III (413), which is rotatably connected to the connecting lug at the lower part of the pry bar II via a pin.

3. The protection device for a proximity switch of a pallet conveyor system according to claim 2, characterized in that: The adapter set has a sealing ring (54), the outer circle of which is connected to the inner circumferential surface of the through hole of the arm plate II.

4. The protection device for a proximity switch of a pallet conveyor system according to claim 3, characterized in that: The solenoid valve is electrically connected to the PLC controller.

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