Safety device for circuit switch of coal mine vertical shaft hoist

Abstract

A coal mine vertical shaft hoist circuit switch safety device disclosed by the present invention comprises a travel switch body, a shaft rotation part, a single-arm push rod and a rotation sealing assembly, the top of the travel switch body is provided with the shaft rotation part, the shaft rotation part is provided with the single-arm push rod through a rotation shaft, and the rotation sealing assembly is arranged between the single-arm push rod and the shaft rotation part. The rotary sealing assembly comprises a first sealing piece and a second sealing piece, the bottom end face of the first sealing piece and the end face of the shaft rotating part are fixedly installed in a sealed mode, and a sealing protrusion is arranged on the inner side of the bottom of the second sealing piece, so that when the single-arm push rod is driven by the rolling wheel, the single-arm push rod is rotationally installed with the travel switch body through the rotating shaft. Through sealing installation of the sealing protrusion and the sealing groove, a gap between the shaft rotating part and the rotating shaft is prevented from being sealed, water and coal ash mud are prevented from entering, the use guarantee of the travel switch is improved, and the use intensity and the use efficiency of the travel switch are improved.

Description

Technical Field

[0001] The invention relates to the technical field of safety start-stop switches for shaft hoists, and in particular to a circuit switch safety device for shaft hoists in coal mines. Background Art

[0002] Intrinsically safe travel switches are also called position switches (also called limit switches). They are commonly used low-current master electrical appliances; switches designed specifically for dangerous environments such as mines to ensure safe and reliable operation. They use the collision of moving parts of production machinery to cause the contacts to move to connect or disconnect the control circuit of the mechanical movement to achieve a certain control purpose. Usually, this type of switch is used to limit the position or stroke of mechanical movement, so that the moving machinery automatically stops the speed change movement or automatically reciprocates according to a certain position or stroke.

[0003] According to the "Inspection Standards for Construction Lifting Equipment and Facilities", the limit switch should not share a trigger element with the limit switch. The upper limit switch is the first safety measure to prevent the cage from hitting the top, and the upper limit switch is the second safety measure to prevent the cage from hitting the top. When the upper limit fails, the upper limit switch takes effect. In order to ensure that the upper limit and the upper limit work independently, the trigger elements fixed on the guide rail frame should be set separately. If the same trigger element is used, once the bolts fixing the trigger element are loose or the trigger element is deflected, the upper limit switch and the upper limit switch will not be triggered.

[0004] Publication (announcement) number: CN112635208A, discloses a new type of travel switch, involving floor heating accessories technology, aiming to solve the problem that when the travel switch is matched with the valve, the travel switch is placed outside the valve and connected to the travel switch through the valve stem. Due to the external placement of the travel switch, the valve stem will have hysteresis during the transmission process, thereby causing the control of the travel switch to lag. The main points of its technical solution are: it includes: it includes a mounting shell, a contact switch detachably connected to the mounting shell, a mounting head detachably connected to the mounting shell, a pushing component slidably connected to the mounting head and used to contact the contact switch, and a rotating component rotatably connected to the mounting head and transmission-connected to the input end of the pushing component. A sealing component is arranged between the pushing component and the contact switch. The sealing component is elastic, and the deformation of the sealing component is equal to the displacement of the pushing component.

[0005] In the prior art: First, the single-arm push rod is rotatably installed through the rotating shaft and the travel switch housing. Due to the high moisture, strong vibration and dust environment in the coal mining area, the gap between the rotating shaft and the travel switch housing is prone to mud and moisture entering the gap due to the rotation and vibration, resulting in large rotation resistance of the single-arm push rod and reduced precision of the opening and closing control of the limited coal mine machinery and equipment. In mild cases, the opening and closing of the coal mine machinery and equipment are intermittent, and the sensitivity of the opening and closing control of the coal mine machinery and equipment is reduced; in severe cases, the coal mine machinery and equipment cannot be started or cannot be shut down in an emergency, causing the equipment to continue to run, resulting in damage to the machinery and equipment.

[0006] Second, the external wiring between the travel switch and the coal mine machinery and equipment and the travel switch housing cannot be sealed, which causes water and coal ash to seep into the travel switch housing when the equipment is in full operation, causing the travel switch to short-circuit and have poor contact, resulting in the travel switch's function not meeting the standards.

[0007] Third, the interior of the travel switch needs to be improved, and an inner layer of seal should be added. The internal sealing setting of the travel switch needs to be improved from the perspective of the entire travel switch.

[0008] For this reason, it is necessary to provide a circuit switch safety device for a coal mine shaft hoist. Summary of the invention

[0009] In view of the problems existing in the above-mentioned prior art, the present invention provides a circuit switch safety device for a coal mine shaft hoist, which aims to improve the efficiency of rope-type length calibration and improve the product calibration accuracy, so as to avoid inaccurate product length measurement parameters.

[0010] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a circuit switch safety device for a coal mine shaft hoist, comprising a travel switch body, an axis rotating part, a single-arm push rod, and a rotary seal assembly, wherein the top of the travel switch body is arranged as an axis rotating part, the axis rotating part is provided with a single-arm push rod through a rotating shaft, a rotary seal assembly is arranged between the single-arm push rod and the axis rotating part, the rotary seal assembly comprises a seal member 1 and a seal member 2, the bottom end face of the seal member 1 is sealed and fixedly installed with the end face of the axis rotating part, a limiting part is arranged on the top of the seal member 1, a sealing groove is provided on the limiting part, the top end face of the seal member 2 is sealed and fixedly installed with the bottom end face of the single-arm push rod, and a sealing groove is provided on the bottom inner side of the seal member 2 The sealing protrusion and the sealing groove are installed through physical phenomena to be used for the sealed rotation installation of the seal member 1 and the seal member 2. The bottom of the travel switch body is provided with an inlet, and the circumferential sealing clamp of the inlet is installed with a clamping plate, and an arc-shaped sleeve plate is fixedly installed on the inner side of the clamping plate, and an insulating sleeve core is arranged inside the arc-shaped sleeve plate, and a wiring groove is symmetrically opened on the end surface of the insulating sleeve core away from the arc-shaped sleeve plate, and a sealing gasket 1 is arranged inside the wiring groove, and an arc-shaped threaded sleeve is arranged on the end surface of the wiring groove away from the clamping plate, and a telescopic sealing tube is threadedly installed on the two arc-shaped threaded sleeves distributed above and below, and a soft sleeve is arranged on the side of the telescopic sealing tube away from the arc-shaped threaded sleeve, and a fastening nut is arranged on the upper thread of the soft sleeve.

[0011] Preferably, the side of the telescopic sealing tube away from the arc-shaped threaded sleeve is configured as a conical cylindrical tube structure.

[0012] Preferably, the inner diameter of the soft sleeve is smaller than the inner diameter of the sleeve hole surrounded by the two arc-shaped threaded sleeves.

[0013] Preferably, a second sealing gasket is provided on the inner side of the clamping plate.

[0014] Preferably, a threaded column is circumferentially arranged inside the travel switch body, an inner sealing plate is arranged inside the travel switch body, and an outer cover of the travel switch body is sealed and fixedly installed with the inner sealing plate and the threaded column in sequence by bolts.

[0015] Preferably, the end surface of the arc-shaped sleeve plate is installed in abutment with the end surface of the line inlet.

[0016] In summary, the present invention provides a circuit switch safety device for a coal mine shaft hoist, wherein a seal member 1 and a seal member 2 are installed by a rotary seal, a limiting portion is arranged at the top of the seal member 1, a sealing groove is opened on the limiting portion, a sealing protrusion is arranged on the inner side of the bottom of the seal member 2, the sealing protrusion and the sealing groove are installed by means of thermal expansion and contraction to realize that the sealing protrusion is sealed and installed in the sealing groove, and when the single-arm push rod is driven by a roller, the single-arm push rod is rotatably installed with the travel switch body through the rotating shaft, and when the travel switch is running, the sealing protrusion and the sealing groove are sealed and installed to protect the gap sealing setting between the shaft rotating portion and the rotating shaft, thereby solving the problems of moisture and coal ash mud entering, improving the use guarantee of the travel switch, and improving the use strength and high efficiency of the travel switch.

[0017] The external wire clamp is installed in the wiring trough, and a sealing gasket is installed between the external wire and the wiring trough, so that the external wire is sealed and installed in the two wiring troughs. The end face of the wiring trough away from the clamping plate is provided with an arcuate threaded sleeve, and the arcuate threaded sleeve is enclosed to form an installation sleeve. The sleeve is threadedly installed with a telescopic sealing tube, and the side of the telescopic sealing tube away from the arcuate threaded sleeve is provided with a soft sleeve. The external wire is inserted from one end of the telescopic sealing tube with a larger aperture, and then passed out from one end of the soft sleeve with a small aperture, so as to achieve the sealed installation of the external wire at the arcuate threaded sleeve. The external wire is passed out from one end of the soft sleeve with a small aperture, and the external wire and the soft sleeve are sealed and installed by interference fit, and then a fastening nut is provided through the upper thread of the soft sleeve, and the soft sleeve is tightened and installed by the fastening nut, so as to achieve further sealed installation of the soft sleeve to the external wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the shaft hoist circuit switch of the present invention; Figure 2 It is a schematic diagram of the sealing installation structure between the shaft rotating part and the single-arm push rod of the present invention; Figure 3 It is a schematic diagram of the structure of the rotary seal assembly of the present invention; Figure 4 It is a schematic diagram of the sealing structure at the line inlet of the present invention; Figure 5 It is a schematic diagram of the structure of the clamping plate, the arc-shaped sleeve plate and the insulating sleeve core of the present invention; Figure 6 It is a schematic diagram of the sealing installation structure of the arc-shaped threaded sleeve and the telescopic sealing tube of the present invention; Figure 7 It is a structural schematic diagram of the inner sealing plate of the present invention installed inside the travel switch body; In the figure: travel switch body 1, shaft rotating part 2, single-arm push rod 3, rotary seal assembly 4, seal 1 5, seal 2 6, limit part 7, sealing groove 11, sealing protrusion 12, wire inlet 13, clamping plate 14, arc-shaped sleeve plate 15, insulating sleeve core 16, wiring groove 17, sealing gasket 1 21, arc-shaped threaded sleeve 22, telescopic sealing tube 23, soft sleeve 24, fastening nut 25, sealing gasket 2 26, threaded column 27, inner sealing plate 31. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] like Figures 1 to 7 As shown: The present invention is a circuit switch safety device for a coal mine shaft hoist, comprising a travel switch body 1, an axial rotating part 2, a single-arm push rod 3, and a rotary seal assembly 4. The top of the travel switch body 1 is arranged at the axial rotating part 2, the single-arm push rod 3 is installed at the axial rotating part 2 through a rotating shaft, a rotary seal assembly 4 is arranged between the single-arm push rod 3 and the axial rotating part 2, the rotary seal assembly 4 comprises a seal 1 5 and a seal 2 6, the bottom end face of the seal 1 5 is fixedly installed in a seal with the end face of the axial rotating part 2, a limiting part 7 is arranged at the top of the seal 1 5, a sealing groove 11 is provided on the limiting part 7, the top end face of the seal 2 6 is fixedly installed in a seal with the bottom end face of the single-arm push rod 3, a sealing protrusion 12 is arranged on the inner side of the bottom of the seal 2 6, the sealing protrusion 12 and the sealing groove 11 are physically connected. Phenomenon installation, for sealing and rotating installation of seal 1 5 and seal 2 6, a line inlet 13 is arranged at the bottom of the travel switch body 1, a clamping plate 14 is installed for circumferential sealing clamping of the line inlet 13, an arc-shaped sleeve plate 15 is fixedly installed on the inner side of the clamping plate 14, an insulating sleeve core 16 is arranged inside the arc-shaped sleeve plate 15, a wiring groove 17 is symmetrically provided on the end face of the insulating sleeve core 16 away from the arc-shaped sleeve plate 15, a sealing gasket 21 is arranged inside the wiring groove 17, an arc-shaped threaded sleeve 22 is arranged on the end face of the wiring groove 17 away from the clamping plate 14, a telescopic sealing tube 23 is threadedly installed on the two arc-shaped threaded sleeves 22 distributed above and below, a soft sleeve 24 is arranged on the side of the telescopic sealing tube 23 away from the arc-shaped threaded sleeve 22, and a fastening nut 25 is arranged on the upper thread of the soft sleeve 24.

[0021] In order to solve the technical problems existing in the prior art, the technical structure adopted by the present invention is as follows: an axial rotating part 2 is arranged at the top of the travel switch body 1, and a single-arm push rod 3 is installed on the axial rotating part 2 through a rotating shaft. In order to realize the gap sealing setting between the axial rotating part 2 and the rotating shaft, to prevent water or coal ash mud from entering the gap, and to prevent the problem of reduced gap protection caused by vibration during operation, a seal 1 5 is arranged on the end face of the axial rotating part 2, and a seal 2 6 is fixedly installed on the bottom end face of the single-arm push rod 3. The seal 1 5 and the seal 2 6 are installed through a rotary seal, and a limit portion 7 is arranged on the top of the seal 1 5. The limit portion 7 is provided with a sealing groove 11, and a sealing protrusion 12 is provided on the inner side of the bottom of the sealing member 6. The sealing protrusion 12 and the sealing groove 11 are installed by means of thermal expansion and contraction to achieve that the sealing protrusion 12 is sealed and installed in the sealing groove 11, so that when the single-arm push rod 3 is driven by the roller, the single-arm push rod 3 is rotatably installed with the travel switch body 1 through the rotating shaft. When the travel switch is running, the sealing protrusion 12 and the sealing groove 11 are sealed and installed to protect the gap sealing setting between the shaft rotating part 2 and the rotating shaft, solve the problem of moisture and coal ash mud entering, improve the use guarantee of the travel switch, and improve the use strength and high efficiency of the travel switch.

[0022] In order to realize the sealing setting of the external wiring of the travel switch body 1, a clamping plate 14 is installed with a circumferential sealing clamp at the wire inlet 13, and an arc-shaped sleeve plate 15 is fixedly installed on the inner side of the clamping plate 14. The end face of the arc-shaped sleeve plate 15 is installed in abutment with the end face of the wire inlet 13, and is installed in the wire inlet 13 through the sealing clamping of the clamping plate 14, so as to realize the sealed abutment installation of the arc-shaped sleeve plate 15 and the wire inlet 13. An insulating sleeve core 16 is arranged inside the arc-shaped sleeve plate 15, and a wiring groove 17 is symmetrically opened on the end face of the insulating sleeve core 16 away from the arc-shaped sleeve plate 15. A sealing gasket 21 is arranged inside the wiring groove 17. After the external wiring is connected, the external wiring is clamped and installed in the wiring groove 17, and is installed between the external wiring and the wiring groove 17 through the sealing gasket 21, so as to realize the sealed installation of the external wiring on the two In a wiring groove 17, an arcuate threaded sleeve 22 is provided on the end face of the wiring groove 17 away from the clamping plate 14, and the arcuate threaded sleeve 22 is surrounded to form a mounting sleeve, and a telescopic sealing tube 23 is threadedly installed on the mounting sleeve, and a soft sleeve 24 is provided on the side of the telescopic sealing tube 23 away from the arcuate threaded sleeve 22. The external wire is inserted from one end of the telescopic sealing tube 23 with a larger aperture, and then passed out from one end of the soft sleeve 24 with a small aperture, so as to achieve the sealed installation of the external wire at the arcuate threaded sleeve 22, and the external wire is passed out from one end of the soft sleeve 24 with a small aperture, and the external wire and the soft sleeve 24 are sealed and installed by interference fit, and then a fastening nut 25 is provided through the upper thread of the soft sleeve 24, and the soft sleeve 24 is tightened and installed by the fastening nut 25, so as to achieve the further sealed installation of the soft sleeve 24 to the external wire.

[0023] In at least one embodiment, in order to realize the sealed sleeve installation of the telescopic sealing tube 23 to the external wiring and the sealed installation of the soft sleeve 24 to the external wiring, the structure adopted is: the side of the telescopic sealing tube 23 away from the arc-shaped threaded sleeve 22 is set to a conical cylindrical tube structure.

[0024] In at least one embodiment, in order to provide a sealing arrangement between the soft sleeve 24 and the external wire, a structure is adopted in which the inner diameter of the soft sleeve 24 is smaller than the inner diameter of the sleeve hole surrounded by the two arc-shaped threaded sleeves 22 .

[0025] In at least one embodiment, in order to achieve the installation of sealed access to the inlet port 13 for external wiring, a structure is adopted: a sealing gasket 26 is provided on the inner side of the clamping plate 14, and the sealing gasket 26 is sealed and installed between the inlet port 13 and the clamping plate 14, so that the clamping plate 14 is provided to seal and clamp the inlet port 13, thereby further improving the installation of sealed access to the inlet port 13 for external wiring.

[0026] At least in one embodiment, in order to achieve the overall sealing strength of the travel switch, the technical structure is adopted as follows: a threaded column 27 is circumferentially arranged inside the travel switch body 1, an inner sealing plate 31 is arranged inside the travel switch body 1, and the outer cover of the travel switch body 1 is sealed and fixedly installed with the inner sealing plate 31 and the threaded column 27 in sequence by bolts.

[0027] The embodiments of the present invention are only used to illustrate the present invention and do not constitute a limitation on the scope of the claims. Other substantially equivalent substitutes that can be thought of by those skilled in the art are all within the protection scope of the present invention.

Claims

1. A circuit switch safety device for a coal mine shaft hoist, characterized in that: The invention comprises a travel switch body (1), an axial rotating part (2), a single-arm push rod (3), and a rotary seal assembly (4). The top of the travel switch body (1) is provided with the axial rotating part (2). The single-arm push rod (3) is installed on the axial rotating part (2) via a rotating shaft. A rotary seal assembly (4) is provided between the single-arm push rod (3) and the axial rotating part (2). The rotary seal assembly (4) comprises a seal member 1 (5) and a seal member 2 (6). The bottom end face of the seal member 1 (5) is fixedly installed in a sealing manner with the end face of the axial rotating part (2). A limiting part (7) is provided on the top of the seal member 1 (5). A sealing groove (11) is provided on the limiting part (7). The top end face of the seal member 2 (6) is fixedly installed in a sealing manner with the bottom end face of the single-arm push rod (3). A sealing protrusion (12) is provided on the inner side of the bottom of the seal member 2 (6). The sealing protrusion (12) and the sealing groove (11) are installed by physical phenomena for sealing. The first component (5) and the second sealing component (6) are installed in a sealed manner for rotation. A wire inlet (13) is arranged at the bottom of the travel switch body (1). A clamping plate (14) is installed on the circumferential sealing clamp of the wire inlet (13). An arc-shaped sleeve plate (15) is fixedly installed on the inner side of the clamping plate (14). An insulating sleeve core (16) is arranged inside the arc-shaped sleeve plate (15). A wiring groove (17) is symmetrically opened on the end surface of the insulating sleeve core (16) away from the arc-shaped sleeve plate (15). A sealing gasket (21) is arranged inside the wiring groove (17). An arc-shaped threaded sleeve (22) is arranged on the end surface of the wiring groove (17) away from the clamping plate (14). A telescopic sealing tube (23) is threadedly installed on two arc-shaped threaded sleeves (22) distributed above and below. A soft sleeve (24) is arranged on the side of the telescopic sealing tube (23) away from the arc-shaped threaded sleeve (22). A fastening nut (25) is arranged on the upper thread of the soft sleeve (24).

2. A coal mine shaft hoist circuit switch safety device according to claim 1, characterized in that: The side of the telescopic sealing tube (23) away from the arc-shaped threaded sleeve (22) is arranged as a conical columnar tube structure.

3. A circuit switch safety device for a coal mine shaft hoist according to claim 1, characterized in that: The inner diameter of the soft sleeve (24) is smaller than the inner diameter of the sleeve hole enclosed by the two arc-shaped threaded sleeves (22).

4. A coal mine shaft hoist circuit switch safety device according to claim 1, characterized in that: A second sealing gasket (26) is provided on the inner side of the clamping plate (14).

5. A circuit switch safety device for a coal mine shaft hoist according to claim 1, characterized in that: A threaded column (27) is provided in the circumferential direction of the interior of the travel switch body (1), an inner sealing plate (31) is provided inside the travel switch body (1), and an outer cover of the travel switch body (1) is sealed and fixedly mounted to the inner sealing plate (31) and the threaded column (27) in sequence by bolts.

6. A coal mine shaft hoist circuit switch safety device according to claim 1, characterized in that: The end surface of the arc-shaped sleeve plate (15) is mounted in abutment with the end surface of the line inlet (13).

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