Coal mine underground combination switch

Abstract

The utility model discloses a coal mine underground combination switch, the coal mine underground combination switch comprises a combination switch body and a locking assembly, the combination switch body is used for controlling the on-off of coal mine underground electric equipment, the combination switch body comprises a box body and a plurality of rotary switches, and the plurality of rotary switches are arranged at intervals along the length direction of the box body. The rotating switch is arranged in the box body, the rotating switch can rotate around the thickness direction of the box body relative to the box body, the rotating switch has a vertical position and a horizontal position, the electric equipment is powered on to start working at the vertical position, the electric equipment is powered off to stop working at the horizontal position, and the locking assembly is arranged on the box body and located on one side of the rotating switch. The underground coal mine combination switch can be supervised by a specially-assigned person, and the situations of mistaken power transmission, wrong power transmission and the like are prevented.

Description

Technical Field

[0001] The utility model relates to the field of relay protection, in particular to an underground combined switch in a coal mine. Background Art

[0002] The underground combination switch of coal mine is suitable for underground coal mines in environments with coal dust and explosive gases. It can meet the various start and stop control requirements of coal mining machines, scraper conveyors, crushers, transfer machines, pump stations and belt conveyors in comprehensive mechanized coal mining working faces, such as double-speed double motors, double-speed single motors, single-speed single motors, single-speed multiple motors, etc., and its application method is very flexible.

[0003] In the related technology, when repairing a part of the controlled equipment, the combination switch in the coal mine cannot be effectively supervised by a dedicated person, which can easily cause the wrong power supply, resulting in accidents such as damage to operating personnel and electrical equipment. Utility Model Content

[0004] The present utility model is based on the discovery and recognition of the following facts and problems by the utility model inventor:

[0005] In the related technology, when the control equipment of the coal mine underground equipment is repaired, after the isolation handle (rotary switch) of the combination switch in the coal mine is powered off and locked, the isolation handle cannot be effectively locked, and effective supervision by a dedicated person cannot be achieved; if multiple people supervise at the same time, it is easy to cause mis-power supply, wrong power supply, etc., resulting in accidents such as damage to operators and electrical equipment.

[0006] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the utility model provides an underground combined switch in a coal mine that can be effectively supervised and is easy to use.

[0008] According to an embodiment of the utility model, a combination switch in a coal mine comprises: a combination switch body, the combination switch body is used to control the on and off of electrical equipment in a coal mine, the combination switch body comprises a box body and a plurality of rotary switches, the plurality of rotary switches are arranged at intervals along the length direction of the box body, and the rotary switches are rotatable relative to the box body around the thickness direction of the box body, the rotary switch has a vertical position and a horizontal position, in the vertical position, the electrical equipment is powered on so that the electrical equipment starts to work, and in the horizontal position, the electrical equipment is powered off so that the electrical equipment stops working; a locking assembly, the locking assembly is arranged on the box body and is located on one side of the rotary switch, the locking assembly has a locked state and an unlocked state, in the locked state, the rotary switch is located in the horizontal position and the locking assembly is connected to the rotary switch, so that the locking assembly locks the rotary switch to limit the rotation of the rotary switch, and in the unlocked state, the locking assembly is disconnected from the rotary switch to allow the rotary switch to rotate.

[0009] The coal mine underground combination switch of the utility model embodiment is provided with a locking component, and the locking component locks the rotary switch, so that the electrical equipment in the coal mine is always in a power-off state, which effectively solves the problem that the rotary switch cannot be effectively locked when the combination switch is powered off for maintenance of the controlled equipment and power supply lines. The control circuit under maintenance can be effectively powered off and locked, and effective supervision is achieved. While ensuring safety, the scope of power outage impact is effectively reduced, and the equipment operation rate and production efficiency are improved.

[0010] In some embodiments, the locking assembly includes: a sliding rod, which extends along the length direction of the box body and is arranged on the outer peripheral side of the box body and adjacent to one side of the rotary switch; a clamping member, which is arranged on the sliding rod and can be moved relative to the sliding rod along the length direction of the sliding rod; a connecting member and a locking member. In the locked state, the clamping member and the rotary switch are arranged opposite to each other in the width direction of the box body, one end of the connecting member is connected to the free end of the rotary switch, and the other end of the connecting member is clamped in the clamping member, and the locking member locks the clamping member so that the clamping member clamps the connecting member. In the unlocked state, the locking member is disconnected from the clamping member so that the rotary switch is disconnected from the connecting member.

[0011] In some embodiments, the clamping member includes a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are both spaced apart along the length direction of the sliding rod to define a clamping cavity. In the locked state, the connecting member is disposed in the clamping cavity, and the first clamping plate and the second clamping plate are both passed through the sliding rod and are movable relative to the sliding rod along the length direction of the sliding rod.

[0012] In some embodiments, the first clamping plate has a first hole that passes through the first clamping plate along its thickness direction, and the second clamping plate has a second hole that passes through the second clamping plate along its thickness direction, and the first hole and the second hole are spaced apart and arranged relative to each other so that the locking member passes through the first hole and the second hole to lock the clamping member.

[0013] In some embodiments, the locking member includes a six-hole lock buckle and a padlock. In the locked state, the lock head of the six-hole lock buckle is inserted into the first hole and the second hole, and the padlock is locked in the lock hole of the six-hole lock buckle, so that the six-hole lock buckle drives the first clamping plate and the second clamping plate to tighten the connecting member. In the unlocked state, the padlock is detached from the six-hole lock buckle.

[0014] In some embodiments, there are multiple padlocks, and in the locked state, the multiple padlocks are all locked in the lock holes of the six-hole lock buckle.

[0015] In some embodiments, there are multiple clamping members, and the multiple clamping members are all disposed on the sliding rod and are movable relative to the sliding rod along the length direction of the sliding rod.

[0016] In some embodiments, a slot is provided on a side of the connector facing the rotary switch, and in the locked state, the free end of the rotary switch is inserted into the slot.

[0017] In some embodiments, in the locked state, the connecting member is located between the first hole and the sliding rod.

[0018] In some embodiments, the coal mine underground combination switch also includes a management sign, which is hung on the box body and adjacent to one side of the rotary switch, and the management sign records the work information of the maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the structure of a combined switch in an underground coal mine according to an embodiment of the utility model.

[0020] Figure 2 yes Figure 1 A partial enlarged view of middle A.

[0021] Figure 3 The utility model is a schematic structural diagram of a clamping member of an underground combined switch in a coal mine according to an embodiment of the utility model.

[0022] Combined switch for underground coal mine 100;

[0023] Combination switch body 1; box 11; rotary switch 12;

[0024] Locking assembly 2; slide bar 21; clamping member 22; first clamping plate 221; first hole 2211; second clamping plate 222; second hole 2221; connecting plate 223; connecting member 23; locking member 24; six-hole lock buckle 241; padlock 242; DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0026] The coal mine underground combination switch 100 according to an embodiment of the utility model is described below with reference to the accompanying drawings.

[0027] like Figure 1-3 As shown, the coal mine underground combination switch 100 according to the embodiment of the utility model includes a combination switch body 1 and a locking assembly 2.

[0028] The combination switch body 1 is used to control the on and off of electrical equipment in coal mines. The combination switch body 1 includes a box body 11 and a plurality of rotary switches 12. The plurality of rotary switches 12 are arranged along the length direction of the box body 11 (such as Figure 1 The rotary switches 12 are arranged at intervals relative to the box body 11 in the thickness direction of the box body 11 (as shown in the vertical direction). Figure 3 The rotary switch 12 can be rotated in the front-to-back direction shown in the figure. The rotary switch 12 has a vertical position and a horizontal position. In the vertical position, the electric device is powered on to start working with the electric device, and in the horizontal position, the electric device is powered off to stop working with the electric device. Specifically, as Figure 1-2 As shown, each rotary switch 12 can control the on and off of at least one electrical device in the coal mine. Multiple rotary switches 12 are arranged at intervals in the up and down directions. When the rotary switch 12 is in the vertical position, the electrical device is powered on and works. When the rotary switch 12 is in the horizontal position, the electrical device is powered off so that the electrical device stops working underground.

[0029] The locking assembly 2 is disposed on the box body 11 and is located on one side of the rotary switch 12. The locking assembly 2 has a locked state and an unlocked state. In the locked state, the rotary switch 12 is located in a horizontal position and the locking assembly 2 is connected to the rotary switch 12, so that the locking assembly 2 locks the rotary switch 12 to restrict the rotation of the rotary switch 12. In the unlocked state, the locking assembly 2 is disconnected from the rotary switch 12 to allow the rotary switch 12 to rotate. Specifically, Figure 1-2As shown, the locking assembly 2 is arranged on the box body 11 and is located on the right side of the rotary switch 12. In the locked state, the rotary switch 12 is rotated to the horizontal state, and the locking assembly 2 locks the rotary switch 12 to prevent the rotary switch 12 from rotating. In the unlocked state, the locking assembly 2 is disconnected from the rotary switch 12, so that the rotary switch 12 can rotate between the horizontal state and the vertical state.

[0030] The coal mine underground combination switch 100 of the utility model embodiment is provided with a locking component 2, and the locking component 2 locks the rotary switch to lock the rotary switch 12 to a horizontal state, so that the electrical equipment in the coal mine is always in a power-off state, which effectively solves the problem that the rotary switch 12 cannot be effectively locked when the combination switch is powered off for repairing the controlled equipment and power supply lines. When repairing one part of the controlled equipment, the repaired control circuit can be effectively powered off and locked, and effective supervision is achieved. While ensuring safety, the impact range of power outages is effectively reduced, the equipment operation rate and production efficiency are improved, and the occurrence of electric shock accidents by electricians during the repair of electrical equipment is prevented, thereby improving the safety of maintenance personnel.

[0031] In some embodiments, the locking assembly 2 includes a sliding rod 21 , a clamping member 22 , a connecting member 23 and a locking member 24 .

[0032] The slide bar 21 extends along the length direction of the box body 11 (eg Figure 1 The upper and lower directions shown in FIG. 1 extend and are arranged on the outer peripheral side of the box body 11 and adjacent to one side of the rotary switch 12. Specifically, as shown in FIG. Figure 1-2 As shown, the slide bar 21 extends in the up-down direction and is disposed on the box body 11 . The slide bar 21 is disposed on the right side of the rotary switch 12 .

[0033] The clamping member 22 is disposed on the slide bar 21 and can be clamped relative to the slide bar 21 along the length direction of the slide bar 21 (eg Figure 1 In the locked state, the clamping member 22 and the rotary switch 12 are movable in the width direction of the box body 11 (as shown in the upper and lower directions). Figure 1 The connecting member 23 is arranged relatively in the left and right directions as shown in the figure, one end of the connecting member 23 is connected to the free end of the rotary switch 12, the other end of the connecting member 23 is clamped in the clamping member 22, and the locking member 24 locks the clamping member 22 so that the clamping member 22 clamps the connecting member 23. In the unlocked state, the locking member 24 is disconnected from the clamping member 22, so that the rotary switch 12 is disconnected from the connecting member 23. Specifically, as Figure 1-2As shown, the clamping member 22 extends in the front-to-back direction and is inserted into the slide bar 21 and can be moved in the up-and-down direction. In the locked state, the clamping member 22 is moved to one side of the rotary switch 12 to be locked, so that the clamping member 22 and the rotary switch 12 to be locked are spaced apart in the left-right direction. The left end of the connecting member 23 is connected to the right end of the rotary switch 12, and the right end of the connecting member 23 is inserted into the clamping member 22. The locking member 24 is locked on the clamping member 22 to drive the clamping force on the clamping member 22, so that the clamping member 22 tightens the right end of the connecting member 23, thereby preventing the rotary switch 12 from rotating. In the unlocked state, the locking member 24 is disconnected from the clamping member 22, so that the connecting member 23 is no longer restricted by the clamping member 22, thereby allowing the rotary switch 12 to rotate.

[0034] In some embodiments, the slide bar 21 may be a rectangular slide bar, thereby preventing the clamping member 22 from rotating on the slide bar 21 and ensuring the stability of the clamping member 22 in use.

[0035] In some embodiments, the clamping member 22 includes a first clamping plate 221 and a second clamping plate 222, and the first clamping plate 221 and the second clamping plate 222 are arranged at intervals along the length direction of the slide bar 21 to define a clamping cavity. In the locked state, the connecting member 23 is arranged in the clamping cavity, and the first clamping plate 221 and the second clamping plate 222 are both inserted into the slide bar 21 and can move relative to the slide bar 21 along the length direction of the slide bar 21. Specifically, Figure 3 As shown, the first clamping plate 221 and the second clamping plate 222 are spaced apart in the up-down direction, and the first clamping plate 221 and the second clamping plate 222 are passed through the slide bar 21 and can be moved in the up-down direction. When the rotary switch 12 needs to be locked, the connecting member 23 is passed through the first clamping plate 221 and the second clamping plate 222, thereby making the setting of the clamping member 22 more reasonable.

[0036] In some embodiments, the clamping member 22 also includes a connecting plate 223, which is a vertical plate and is arranged between the first clamping plate 221 and the second clamping plate 222. The upper end of the connecting plate 223 is connected to the front end of the first clamping plate 221, and the lower end of the connecting plate 223 is connected to the front end of the second clamping plate 222, so that the first clamping plate 221 and the second clamping plate 222 form a whole through the connecting plate 223, thereby improving the utilization rate of the clamping member 22.

[0037] In some embodiments, the first clamping plate 221 has a thickness along its thickness direction (eg Figure 3 The second clamping plate 222 has a first hole 2211 extending through the first clamping plate 221 in the vertical direction (as shown in FIG. Figure 3The second hole 2221 of the second clamping plate 222 is penetrated in the vertical direction as shown in the figure. The first hole 2211 and the second hole 2221 are arranged opposite to each other at intervals, so that the locking member 24 passes through the first hole 2211 and the second hole 2221 to lock the clamping member 22. Specifically, as shown in FIG. Figure 1-3 As shown, the first hole 2211 is located at the rear end of the first clamping plate 221, and the second hole 2221 is located at the rear end of the second clamping plate 222. The first hole 2211 and the second hole 2221 are arranged opposite to each other in the up and down directions. The locking member 24 is penetrated into the first hole 2211 and the second hole 2221 and applies a clamping force to the first clamping plate 221 and the second clamping plate 222 through the first hole 2211 and the second hole 2221, so that the first clamping plate 221 and the second clamping plate 222 tighten the connecting member 23.

[0038] In some embodiments, the locking member 24 includes a six-hole lock buckle 241 and a padlock 242. In the locked state, the lock head of the six-hole lock buckle 241 is inserted into the first hole 2211 and the second hole 2221, and the padlock 242 is locked in the lock hole of the six-hole lock buckle 241, so that the six-hole lock buckle 241 drives the first clamping plate 221 and the second clamping plate 222 to tighten the connecting member 23. In the unlocked state, the padlock 242 is separated from the six-hole lock buckle 241. Thus, the clamping force is applied to the first clamping plate 221 and the second clamping plate 222 through the six-hole lock hole, and the padlock 242 is locked on the six-hole lock buckle 241 to lock the six-hole lock buckle 241 and prevent the six-hole lock buckle 241 from opening, thereby making the setting of the locking member 24 more reasonable.

[0039] In some embodiments, there are multiple padlocks 242, and in the locked state, multiple padlocks 242 are locked in the lock holes of the six-hole lock buckle 241. Specifically, the number of padlocks 242 can be set according to the actual needs. When one maintenance personnel is required to inspect the underground electrical equipment and the lines of the electrical equipment, one padlock 242 can be set on the six-hole lock buckle 241. When multiple maintenance personnel are required to inspect the underground electrical equipment and the lines of the electrical equipment, multiple padlocks 242 can be set on the six-hole lock buckle 241, and the keys of each padlock 242 are respectively given to different maintenance personnel, thereby effectively realizing simultaneous supervision by multiple people to prevent problems such as mis-power transmission and wrong power transmission.

[0040] In some embodiments, there are multiple clamping members 22, and the multiple clamping members 22 are all arranged on the slide bar 21 and can move relative to the slide bar 21 along the length direction of the slide bar 21. Specifically, multiple clamping members 22 can be set according to actual conditions, and each clamping member 22 is arranged on the slide bar 21 and slides on the slide bar 21 along the up and down direction. When it is necessary to lock multiple rotary switches 12, multiple clamping members 22 and multiple rotary switches 12 can be arranged relative to each other in the left and right directions, and the rotary switches 12 can be locked by the locking member 24 and the connecting rod, thereby improving the working efficiency of the locking assembly 2.

[0041] In some embodiments, a slot (not shown) is provided on one side of the connector 23 facing the rotary switch 12. In the locked state, the free end of the rotary switch 12 is inserted into the slot. Figure 1 As shown, a slot is provided at the left end of the connecting member 23 , and in a locked state, the right end of the rotary switch 12 is inserted into the slot, so that the connecting member 23 is connected to the rotary switch 12 .

[0042] In some embodiments, in the locked state, the connecting member 23 is located between the first hole 2211 and the slide bar 21. Specifically, the right end of the connecting member 23 is located in the middle of the clamping member 22, so that the connecting member 23 is tightened in the clamping member 22 more stably.

[0043] In some embodiments, the underground combination switch 100 of the coal mine further includes a management card (not shown in the figure), which is hung on the box 11 and adjacent to the side of the rotary switch 12, and the management card records the work information of the maintenance personnel. Specifically, the management card may record the name, telephone number, and work content of the maintenance personnel, and the management card is hung on the box 11 and located above the locked rotary switch 12, so as to facilitate the verification of the maintenance personnel information and work progress.

[0044] In some embodiments, the coal mine underground combination switch further includes a management plate, which can be mounted on the housing 11 by bonding or magnetism. Since the housing 11 of the combination switch body 1 is generally made of metal, a magnet can be mounted on the back of the management plate, thereby facilitating the management plate to be mounted on the housing 11 by magnetism, or adhesive can be placed between the back of the maintenance plate and the outer peripheral surface of the housing 11, thereby enabling the management plate to be mounted on the housing 11 by bonding.

[0045] It is worth noting that the combination switch body 1 and the hexagonal lock in the embodiment of the utility model are in the prior art. For example, the combination switch body 1 can be a QJZ2-2000 / 1140(660)-8B type explosion-proof and intrinsically safe combination switch for mining, and 8 control circuits can be put into use at the same time. The coal mine underground combination switch 100 in the embodiment of the utility model is not described in detail.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A combination switch for underground coal mines, characterized in that: include: A combination switch body, the combination switch body is used to control the on and off of electrical equipment in coal mines, the combination switch body includes a box body and a plurality of rotary switches, the plurality of rotary switches are arranged at intervals along the length direction of the box body, and the rotary switches are rotatable relative to the box body around the thickness direction of the box body, the rotary switch has a vertical position and a horizontal position, in the vertical position, the electrical equipment is powered on so that the electrical equipment starts working, and in the horizontal position, the electrical equipment is powered off so that the electrical equipment stops working; a locking assembly, the locking assembly is arranged on the box body and is located on one side of the rotary switch, the locking assembly has a locked state and an unlocked state, in the locked state, the rotary switch is located in the horizontal position and the locking assembly is connected to the rotary switch, so that the locking assembly locks the rotary switch to limit the rotation of the rotary switch, and in the unlocked state, the locking assembly is disconnected from the rotary switch to allow the rotary switch to rotate.

2. The coal mine underground combination switch according to claim 1, characterized in that: The locking assembly comprises: A slide bar extending along the length direction of the box body and arranged on the outer peripheral side of the box body and adjacent to one side of the rotary switch; A clamping member, the clamping member is disposed on the slide bar and is movable relative to the slide bar along the length direction of the slide bar; A connecting piece and a locking piece. In the locked state, the clamping piece and the rotary switch are arranged opposite to each other in the width direction of the box body. One end of the connecting piece is connected to the free end of the rotary switch. The other end of the connecting piece is clamped in the clamping piece. The locking piece locks the clamping piece so that the clamping piece clamps the connecting piece. In the unlocked state, the locking piece is disconnected from the clamping piece so that the rotary switch is disconnected from the connecting piece.

3. The underground coal mine combination switch according to claim 2, characterized in that: The clamping member includes a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are both spaced apart along the length direction of the sliding rod to define a clamping cavity. In the locked state, the connecting member is arranged in the clamping cavity, and the first clamping plate and the second clamping plate are both passed through the sliding rod and are movable relative to the sliding rod along the length direction of the sliding rod.

4. The coal mine underground combination switch according to claim 3, characterized in that: The first clamping plate has a first hole that penetrates the first clamping plate along its thickness direction, and the second clamping plate has a second hole that penetrates the second clamping plate along its thickness direction. The first hole and the second hole are arranged relative to each other at intervals so that the locking member passes through the first hole and the second hole to lock the clamping member.

5. The underground coal mine combination switch according to claim 4, characterized in that: The locking member includes a six-hole lock buckle and a padlock. In the locked state, the lock head of the six-hole lock buckle is inserted into the first hole and the second hole, and the padlock is locked in the lock hole of the six-hole lock buckle, so that the six-hole lock buckle drives the first clamping plate and the second clamping plate to tighten the connecting member. In the unlocked state, the padlock is detached from the six-hole lock buckle.

6. The underground coal mine combination switch according to claim 5, characterized in that: There are multiple padlocks, and in the locked state, the multiple padlocks are all locked in the lock holes of the six-hole lock buckle.

7. The coal mine underground combination switch according to claim 2, characterized in that: There are multiple clamping members, and each of the clamping members is disposed on the slide bar and is movable relative to the slide bar along the length direction of the slide bar.

8. The underground coal mine combination switch according to claim 2, characterized in that: A slot is provided on one side of the connector facing the rotary switch. In the locked state, the free end of the rotary switch is inserted into the slot.

9. The underground coal mine combination switch according to claim 4, characterized in that: In the locked state, the connecting member is located between the first hole and the sliding rod.

10. The coal mine underground combination switch according to any one of claims 1 to 9, characterized in that: It also includes a management board, which is hung on the box body and adjacent to one side of the rotary switch, and the management board records the work information of the maintenance personnel.

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