Anti-tearing inhaul cable switch

Abstract

The utility model provides an anti-tearing inhaul cable switch which comprises a switch shell and a torsion shaft, one end of the torsion shaft is located in the switch shell, the other end of the torsion shaft extends out of the back face of the switch shell, an inhaul cable swing rod is arranged at the extending end of the torsion shaft, and an inhaul cable lug is arranged at the swing end of the inhaul cable swing rod. An unlocking deflector rod used for unlocking the inhaul cable swing rod is further arranged on the back face of the switch shell, an adsorption contact piece is arranged at the end, located in the switch shell, of the torsion shaft and comprises a first swing end and a second swing end, and the first swing end and the second swing end extend in the radial direction of the torsion shaft and are arranged in an included angle mode. A first magnetoelectric switch and a second magnetoelectric switch corresponding to the swing paths of the first swing end and the second swing end are also arranged in the switch shell, the first magnetoelectric switch is normally closed, and the second magnetoelectric switch is normally open; the torsion shaft is further provided with a reset torsion spring used for resetting, and when the reset torsion spring drives the torsion shaft to reach the reset state, the first swing end and the first magnetoelectric switch are attracted in an aligned mode, and the second swing end and the second magnetoelectric switch are attracted in an aligned mode. The utility model has the advantages that the non-contact control can be realized, the service life is long, and the sealing performance of electrical components is good.

Description

Technical Field

[0001] The utility model relates to the field of switches, in particular to an anti-tearing cable switch. Background Art

[0002] The tear-proof cable switch is used to detect the tear of the belt conveyor. It is used in conjunction with the wire rope. When the belt is torn, punctured, damaged at the joint, or sharp objects protrude, the tear switch can provide an alarm signal to the monitoring personnel or shut down the conveyor.

[0003] The internal structure of the traditional tear switch is controlled by a contact transmission structure to make the internal switch unit operate and send out a signal. The most common method is to cooperate with a travel switch for control. Due to its poor structural sealing, it is easily affected by moisture, has poor explosion-proof performance and a short service life. Since its control action part is contact control, the reliability of the product is further reduced. Utility Model Content

[0004] Based on the above problems, the utility model aims to provide a tear-resistant cable switch which can realize contactless control, has a long service life and has good sealing of electrical components.

[0005] In view of the above problems, the following technical solutions are provided: an anti-tear cable switch, comprising a switch housing and a torsion shaft, wherein one end of the torsion shaft is located in the switch housing, and the other end extends out of the back of the switch housing, a cable swing rod is provided at the extended end of the torsion shaft, a cable ear is provided at the swinging end of the cable swing rod, and an unlocking lever for unlocking the cable swing rod is also provided on the back of the switch housing, and an adsorption contact piece is provided at one end of the torsion shaft located in the switch housing, and the adsorption contact piece includes a first swinging end and a second swinging end extending in the radial direction of the torsion shaft and arranged at an angle to each other; a first magnetoelectric switch and a second magnetoelectric switch corresponding to the swinging paths of the first swinging end and the second swinging end are also provided in the switch housing, the first magnetoelectric switch is normally closed, and the second magnetoelectric switch is normally open; the torsion shaft is also provided with a reset torsion spring for resetting, and when the reset torsion spring drives the torsion shaft to reach the reset state, the first swinging end is aligned with the first magnetoelectric switch and adsorbed, and the second swinging end is aligned with the second magnetoelectric switch and adsorbed.

[0006] In the above structure, a non-contact induction switch (SM-22-E50 magnetoelectric switch) is used as a transmission signal detection element. Its internal contacts are driven by magnets. When the first swing end and the second swing end are driven by the torsion shaft, the first swing end moves away from the first magnetoelectric switch, and the second swing end moves away from the second magnetoelectric switch, so that the magnets of the first magnetoelectric switch and the second magnetoelectric switch, which were originally adsorbed to the first swing end and the second swing end, lose their adsorption state and then generate action, thereby realizing contactless control. The first magnetoelectric switch and the second magnetoelectric switch are integrally packaged, and have the advantages of higher induction accuracy, good sealing and protection level, good explosion-proof performance, and long service life. They can adapt to a wider voltage range, withstand voltage up to 380 volts, and can be applied to AC / DC power; the middle section of the cable pendulum is connected to the extended end of the torsion shaft, and cable ears are provided at both ends of the cable pendulum to facilitate the connection of cables in different pulling directions.

[0007] The utility model is further configured that a mounting foot is provided at the bottom of the switch housing, and the mounting foot is provided with a mounting hole.

[0008] The utility model is further configured such that the mounting foot is equipped with a welding bracket, and the welding bracket includes a mounting plate, a vertical plate extending downward at 90 degrees to the mounting plate, and a welding plate located at the lower end of the vertical plate and extending horizontally toward the back of the switch housing so that the cross-section of the welding bracket is Z-shaped.

[0009] In the above structure, the mounting foot is connected and fixed to the mounting plate of the welding bracket by bolts, and the welding plate of the welding bracket is directly welded to the detection equipment.

[0010] The utility model is further configured that a cover body is provided at one end of the switch housing facing away from the back side thereof, a sealing ring is provided between the cover body and the switch housing, and the cover body is provided with an observation window.

[0011] In the above structure, the cover body is fixed to the switch housing by bolts and sealed by a sealing ring. The observation window is convenient for observing the current positions of the first swing end and the second swing end in the switch housing to determine whether the cable rocker is in a triggered state, so that after the fault is eliminated, the unlocking lever is toggled to unlock and reset the cable rocker (the locking structure of the unlocking lever and the cable rocker is prior art and will not be elaborated here).

[0012] The utility model is further configured such that the torsion shaft is also provided with an adjustment plate, the adjustment plate is provided with a plurality of first torque adjustment holes arranged at intervals along the circumferential direction of the torsion shaft, the inner cavity of the switch housing is provided with a second torque adjustment hole, one end of the reset torsion spring is located in the first torque adjustment hole, and the other end is located in the second torque adjustment hole.

[0013] The utility model is further configured such that the second torque adjustment hole is located at the back of the switch housing cavity, and the second torque adjustment holes are multiple and are arranged at intervals along the circumferential direction of the torsion axis.

[0014] In the above structure, when the cable rocker is connected to the cable, the weight of the cable is often affected by the length or diameter of the cable. Therefore, it is necessary to adjust the position of the reset torsion spring in the first torque adjustment hole and / or the second torque adjustment hole to increase or decrease the preset force of the reset torsion spring so that the cable has appropriate sensitivity to control the rotation of the torsion shaft.

[0015] The utility model is further configured that a fixing bracket is provided in the switch housing, and the first magnetoelectric switch and the second magnetoelectric switch are fixed on the fixing bracket.

[0016] In the above structure, the fixing bracket is used to fix the first magnetoelectric switch and the second magnetoelectric switch.

[0017] The utility model is further configured such that the fixing bracket is provided with an adjustment hole, the outer walls of the first magnetoelectric switch and the second magnetoelectric switch are provided with adjustment threads and fixing nuts, the first magnetoelectric switch and the second magnetoelectric switch pass through the adjustment hole and are fixed to the fixing bracket by fixing nuts screwed with the adjustment threads.

[0018] In the above structure, it is convenient to adjust the adsorption gap between the first magnetoelectric switch, the second magnetoelectric switch and the first swing end, the second swing end.

[0019] The utility model is further configured such that when the torsion shaft is triggered to rotate, the first swing end swings toward the second swing end, and the swing radius of the first swing end is smaller than the swing radius of the second swing end.

[0020] In the above structure, it is avoided that the second magnetoelectric switch generates a false alarm when the first swing end swings close to the position of the second magnetoelectric switch during the swinging.

[0021] The utility model is further configured such that the adsorption contact piece includes a first contact piece and a second contact piece, the first swing end is located on the first contact piece, the second swing end is located on the second contact piece, and the distance from the first contact piece to the back side of the switch housing is greater than the distance from the second contact piece to the back side of the switch housing.

[0022] In the above structure, the adsorption distance between the first swing end and the first magnetoelectric switch is L1, and the adsorption distance between the second swing end and the second magnetoelectric switch is L2, and L1 and L2 are equidistant. Since the first contact piece and the second contact piece are in a stacked relationship, when the torsion shaft is triggered to rotate, even if the first swing end swings close to the second magnetoelectric switch, in addition to using the radial length difference for magnetic isolation, it can also be further isolated by the circumferential distance difference.

[0023] The beneficial effects of the utility model are as follows: a non-contact induction switch (SM-22-E50 magnetoelectric switch) is internally adopted as a transmission signal detection element, and its internal contacts are driven by magnets. When the first swing end and the second swing end are driven by the torsion shaft, the first swing end is away from the first magnetoelectric switch, and the second swing end is away from the second magnetoelectric switch, so that the magnets of the first magnetoelectric switch and the second magnetoelectric switch, which were originally in an adsorption state to the first swing end and the second swing end, lose their adsorption state and then generate action, thereby realizing contactless control. The first magnetoelectric switch and the second magnetoelectric switch are integrally packaged, and have the advantages of higher induction accuracy, good sealing and protection level, good explosion-proof performance and long service life. They can adapt to a wider voltage range, withstand voltage up to 380 volts, and can be applied to AC / DC power. The middle section of the cable swing arm is connected to the extended end of the torsion shaft, and cable ears are provided at both ends of the cable swing arm, which is convenient for connecting cables in different pulling directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model from the first viewing angle.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model from a second viewing angle.

[0026] Figure 3 It is a schematic diagram of the first exploded three-dimensional structure of the utility model.

[0027] Figure 4 It is a schematic diagram of the internal three-dimensional structure of the switch housing of the utility model.

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the cable swing rod in the triggering state of the utility model.

[0029] Figure 6 It is a schematic diagram of the second exploded three-dimensional structure of the utility model.

[0030] Meaning of the numbers in the figure: 10-switch housing; 101-mounting foot; 102-mounting hole; 103-sealing ring; 104-second torque adjustment hole; 11-torsion shaft; 111-reset torsion spring; 12-cable rocker; 121-cable ear; 13-unlocking lever; 14-adsorption contact piece; 141-first swing end; 142-second swing end; 143-first contact piece; 144-second contact piece; 15-first magnetoelectric switch; 16-second magnetoelectric switch; 17-cover; 171-observation window; 18-adjustment piece; 181-first torque adjustment hole; 19-fixing bracket; 191-adjustment hole; 192-adjustment thread; 193-fixing nut; 20-welding bracket; 21-mounting plate; 22-vertical plate; 23-welding plate. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] refer to Figures 1 to 6 ,like Figures 1 to 6 The tear-resistant cable switch shown in the figure comprises a switch housing 10 and a torsion shaft 11, wherein one end of the torsion shaft 11 is located in the switch housing 10, and the other end extends outward from the back of the switch housing 10, a cable swing rod 12 is provided at the extended end of the torsion shaft 11, and a cable ear 121 is provided at the swinging end of the cable swing rod 12, and an unlocking lever 13 for unlocking the cable swing rod 12 is also provided at the back of the switch housing 10, and an adsorption contact piece 14 is provided at one end of the torsion shaft 11 located in the switch housing 10, and the adsorption contact piece 14 includes a first contact piece 14 extending in the radial direction of the torsion shaft 11 and arranged at an angle to each other. a swing end 141 and a second swing end 142; the switch housing 10 is also provided with a first magnetoelectric switch 15 and a second magnetoelectric switch 16 corresponding to the swing paths of the first swing end 141 and the second swing end 142, the first magnetoelectric switch 15 is normally closed, and the second magnetoelectric switch 16 is normally open; the torsion shaft 11 is also provided with a reset torsion spring 111 for resetting, when the reset torsion spring 111 drives the torsion shaft 11 to reach the reset state, the first swing end 141 is aligned with the first magnetoelectric switch 15 and the second swing end 142 is aligned with the second magnetoelectric switch 16.

[0033] In the above structure, a non-contact induction switch (SM-22-E50 magnetoelectric switch) is used as a transmission signal detection element. Its internal contacts are driven by magnets. When the first swing end 141 and the second swing end 142 are driven by the torsion shaft 11, the first swing end 141 moves away from the first magnetoelectric switch 15, and the second swing end 142 moves away from the second magnetoelectric switch 16, so that the first magnetoelectric switch 15 and the second magnetoelectric switch 16 that were originally in an adsorption state by the first swing end 141 and the second swing end 142 are The magnet loses its adsorption state and then moves, thereby realizing contactless control. The first magnetoelectric switch 15 and the second magnetoelectric switch 16 are integrally packaged, and have the advantages of higher sensing accuracy, good sealing, protection level, good explosion-proof performance, and long service life. It can adapt to a wider voltage range, withstand voltage up to 380 volts, and can be applied to AC / DC power; the middle section of the cable pendulum 12 is connected to the extended end of the torsion shaft 11, and cable ears 121 are provided at both ends of the cable pendulum 12 to facilitate the connection of cables in different pulling directions.

[0034] In this embodiment, a mounting foot 101 is provided at the bottom of the switch housing 10 , and a mounting hole 102 is provided on the mounting foot 101 .

[0035] In this embodiment, the mounting foot 101 is installed with a welding bracket 20, and the welding bracket 20 includes a mounting plate 21, a vertical plate 22 extending downward at a 90-degree angle to the mounting plate 21, and a welding plate 23 located at the lower end of the vertical plate 22 and extending horizontally toward the back of the switch housing 10, so that the cross-section of the welding bracket 20 is Z-shaped.

[0036] In the above structure, the mounting foot 101 is connected and fixed to the mounting plate 21 of the welding bracket 20 by bolts, and the welding plate 23 of the welding bracket 20 is directly welded to the detection equipment.

[0037] In this embodiment, a cover 17 is disposed at one end of the switch housing 10 facing away from the back thereof, a sealing ring 103 is disposed between the cover 17 and the switch housing 10 , and an observation window 171 is disposed on the cover 17 .

[0038] In the above structure, the cover body 17 is fixed to the switch housing 10 by bolts and sealed by the sealing ring 103. The observation window 171 is convenient for observing the current positions of the first swing end 141 and the second swing end 142 in the switch housing 10 to determine whether the cable rocker 12 is in a triggered state, so that after the fault is eliminated, the unlocking lever 13 is toggled to unlock and reset the cable rocker 12 (the locking structure of the unlocking lever 13 and the cable rocker 12 is prior art and will not be elaborated here).

[0039] In this embodiment, the torsion shaft 11 is further provided with an adjustment plate 18, and the adjustment plate 18 is provided with a plurality of first torque adjustment holes 181 arranged at intervals along the circumferential direction of the torsion shaft 11. The inner cavity of the switch housing 10 is provided with a second torque adjustment hole 104, and one end of the reset torsion spring 111 is located in the first torque adjustment hole 181, and the other end is located in the second torque adjustment hole 104.

[0040] In this embodiment, the second torque adjustment hole 104 is located at the back of the cavity of the switch housing 10 , and there are a plurality of the second torque adjustment holes 104 which are spaced apart along the circumferential direction of the torsion axis 11 .

[0041] In the above structure, when the cable rocker 12 is connected to the cable, the weight of the cable is often affected by the length or diameter of the cable. Therefore, it is necessary to adjust the position of the reset torsion spring 111 in the first torque adjustment hole 181 and / or the second torque adjustment hole 104 to increase or decrease the preset force of the reset torsion spring 111 so that the cable has appropriate sensitivity to control the rotation of the torsion shaft 11.

[0042] In this embodiment, a fixing bracket 19 is disposed in the switch housing 10 , and the first magnetoelectric switch 15 and the second magnetoelectric switch 16 are fixed on the fixing bracket 19 .

[0043] In the above structure, the fixing bracket 19 is used to fix the first magnetoelectric switch 15 and the second magnetoelectric switch 16 .

[0044] In this embodiment, the fixed bracket 19 is provided with an adjustment hole 191, and the outer walls of the first magnetoelectric switch 15 and the second magnetoelectric switch 16 are provided with adjustment threads 192 and fixing nuts 193. The first magnetoelectric switch 15 and the second magnetoelectric switch 16 pass through the adjustment hole 191 and are fixed to the fixed bracket 19 by the fixing nuts 193 screwed together with the adjustment threads 192.

[0045] In the above structure, it is convenient to adjust the adsorption gap between the first magnetoelectric switch 15 , the second magnetoelectric switch 16 and the first swing end 141 , the second swing end 142 .

[0046] In this embodiment, when the torsion shaft 11 is triggered to rotate, the first swing end 141 swings toward the second swing end 142 , and the swing radius of the first swing end 141 is smaller than the swing radius of the second swing end 142 .

[0047] In the above structure, it is avoided that the second magnetoelectric switch 16 generates a false alarm when the first swing end 141 swings to a position close to the second magnetoelectric switch 16 during the swinging.

[0048] In this embodiment, the adsorption contact piece 14 includes a first contact piece 143 and a second contact piece 144, the first swing end 141 is located on the first contact piece 143, the second swing end 142 is located on the second contact piece 144, and the distance from the first contact piece 143 to the back side of the switch housing 10 is greater than the distance from the second contact piece 144 to the back side of the switch housing 10.

[0049] In the above structure, the adsorption distance between the first swing end 141 and the first magnetoelectric switch 15 is L1, and the adsorption distance between the second swing end 142 and the second magnetoelectric switch 16 is L2, and L1 and L2 are equidistant. Since the first contact piece 143 and the second contact piece 144 are in a stacked relationship, when the torsion shaft 11 is triggered to rotate, even if the first swing end 141 swings to a position close to the second magnetoelectric switch 16, in addition to using the radial length difference for magnetic isolation, it can also be further isolated by the circumferential distance difference.

[0050] The beneficial effects of the utility model are as follows: a non-contact induction switch (SM-22-E50 magnetoelectric switch) is used as a transmission signal detection element, and its internal contacts are driven by magnets. When the first swing end 141 and the second swing end 142 are driven by the torsion shaft 11, the first swing end 141 is away from the first magnetoelectric switch 15, and the second swing end 142 is away from the second magnetoelectric switch 16, so that the first magnetoelectric switch 15 and the second magnetoelectric switch 16, which were originally in an adsorption state by the first swing end 141 and the second swing end 142, are 6 loses its adsorption state and then moves, thereby realizing contactless control. The first magnetoelectric switch 15 and the second magnetoelectric switch 16 are integrally packaged, and have the advantages of higher sensing accuracy, good sealing, protection level, good explosion-proof performance, and long service life. It can adapt to a wider voltage range, withstand voltage up to 380 volts, and can be applied to AC / DC power; the middle section of the cable pendulum 12 is connected to the extended end of the torsion shaft 11, and both ends of the cable pendulum 12 are provided with cable ears 121, which are convenient for connecting cables in different pulling directions.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A tear-resistant cable switch, comprising a switch housing and a torsion shaft, wherein one end of the torsion shaft is located in the switch housing, and the other end extends out of the back of the switch housing, a cable swing rod is provided at the extended end of the torsion shaft, a cable ear is provided at the swing end of the cable swing rod, and an unlocking lever for unlocking the cable swing rod is also provided at the back of the switch housing, characterized in that: One end of the torsion shaft located in the switch housing is provided with an adsorption contact piece, and the adsorption contact piece includes a first swing end and a second swing end extending in the radial direction of the torsion shaft and arranged at an angle to each other; the switch housing is also provided with a first magnetoelectric switch and a second magnetoelectric switch corresponding to the swing paths of the first swing end and the second swing end, the first magnetoelectric switch is normally closed, and the second magnetoelectric switch is normally open; the torsion shaft is also provided with a reset torsion spring for resetting, and when the reset torsion spring drives the torsion shaft to reach a reset state, the first swing end is aligned with the first magnetoelectric switch and adsorbed, and the second swing end is aligned with the second magnetoelectric switch and adsorbed.

2. The tear-resistant cable switch according to claim 1, characterized in that: The bottom of the switch housing is provided with a mounting foot, and the mounting foot is provided with a mounting hole.

3. The tear-resistant cable switch according to claim 2, characterized in that: The mounting foot is equipped with a welding bracket, which includes a mounting plate, a vertical plate extending downward at 90 degrees to the mounting plate, and a welding plate located at the lower end of the vertical plate and extending horizontally toward the back of the switch housing, so that the cross section of the welding bracket is Z-shaped.

4. The tear-resistant cable switch according to claim 1, characterized in that: A cover body is provided at one end of the switch housing facing away from the back side thereof, a sealing ring is provided between the cover body and the switch housing, and the cover body is provided with an observation window.

5. The tear-resistant cable switch according to claim 1, characterized in that: The torsion shaft is also provided with an adjustment plate, on which are provided a plurality of first torque adjustment holes spaced apart along the circumferential direction of the torsion shaft; the inner cavity of the switch housing is provided with a second torque adjustment hole; one end of the reset torsion spring is located in the first torque adjustment hole, and the other end is located in the second torque adjustment hole.

6. The tear-resistant cable switch according to claim 5, characterized in that: The second torque adjustment hole is located at the back of the switch housing cavity, and there are a plurality of the second torque adjustment holes which are spaced apart along the circumferential direction of the torsion axis.

7. The tear-resistant cable switch according to claim 1, characterized in that: A fixing bracket is arranged in the switch housing, and the first magnetoelectric switch and the second magnetoelectric switch are fixed on the fixing bracket.

8. The tear-resistant cable switch according to claim 7, characterized in that: The fixing bracket is provided with an adjustment hole, and the outer walls of the first magnetoelectric switch and the second magnetoelectric switch are provided with adjustment threads and fixing nuts. The first magnetoelectric switch and the second magnetoelectric switch pass through the adjustment hole and are fixed to the fixing bracket by fixing nuts screwed with the adjustment threads.

9. The tear-resistant cable switch according to claim 1, characterized in that: When the torsion shaft is triggered to rotate, the first swing end swings toward the second swing end, and the swing radius of the first swing end is smaller than the swing radius of the second swing end.

10. The tear-resistant cable switch according to claim 9, characterized in that: The adsorption contact piece includes a first contact piece and a second contact piece, the first swing end is located on the first contact piece, the second swing end is located on the second contact piece, and the distance from the first contact piece to the back of the switch housing is greater than the distance from the second contact piece to the back of the switch housing.

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