Mechanical locking device of pull switch

Abstract

The utility model relates to a mechanical locking device of a pull switch, and belongs to the technical field of pull switch protection devices. The mechanical locking device of the pull switch is reliable in structure and convenient to use, maintain and replace. According to the technical scheme, the locking device comprises a first threaded rod, a first fixing nut, a first upper locking ring, a second threaded rod, a second fixing nut, a horizontal upper locking rod and a second upper locking ring; one end of the first threaded rod is in threaded connection with the first fixing nut, the other end of the first threaded rod is in threaded connection with the first adjusting nut, and a first upper locking ring is fixed to the first adjusting nut; one end of the second threaded rod is in threaded connection with the second fixing nut, and the other end is in threaded connection with the second adjusting nut; one end of the horizontal upper locking rod is fixedly connected with the lantern ring, the other end of the horizontal upper locking rod is fixedly connected with the second upper locking ring, the lantern ring is slidably arranged on the second threaded rod in a sleeving mode, and the second upper locking ring is arranged outside the first threaded rod in a sleeving mode and aligned with the first upper locking ring. The pull switch locking device is used for locking the pull switch.

Description

Technical Field

[0001] The utility model discloses a mechanical locking device for a pull-wire switch, belonging to the technical field of pull-wire switch protection devices. Background Art

[0002] Belt conveyors are commonly used in businesses due to their high conveying capacity, long conveying distances, convenient loading and unloading, high reliability, simple structure, easy maintenance, and low operating costs. They can also transport materials up and down slopes, making them a common conveyor in businesses. A pull-wire switch, a safety device, is installed on both sides of the belt conveyor. In an emergency, the pull-wire switch can be quickly pulled to disconnect the control circuit current of the equipment, causing it to shut down and protect the equipment or personnel from injury. During routine maintenance, the pull-wire switch should also be locked for safety reasons.

[0003] The KHL1-0.1 / 24 intrinsically safe pull-cord switch for mining is a widely used type of pull-cord switch. When locked, the locking knob is in a horizontal position, requiring the reset button to be pressed and the knob to be turned downward. During maintenance or emergency repairs, the pull-cord switch must be locked to prevent accidental resetting and opening. Current locking devices, such as sealed iron boxes, suffer from the following drawbacks: First, due to the thin, poor quality, and rapid corrosion of the iron box, the hinges and locking elements often become welded and fall off, making repair difficult and maintenance cumbersome, requiring frequent replacement, resulting in high costs and labor intensity. Second, these iron boxes have an observation window, but this window frequently falls off or breaks, rendering it useless as a locking mechanism, defeating its purpose. Third, replacing a damaged pull-cord box requires electricians to reconnect the pull-cord switch's cables. This is time-consuming and labor-intensive, as the box's confined space makes it difficult to operate with tools, and the sharp edges within the box can easily scratch fingers. Based on the above defects, a locking device needs to be redesigned. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a mechanical locking device for a pull-wire switch which has a reliable structure, is easy to use, and is convenient to repair and replace.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a pull-wire switch mechanical locking device, comprising a first threaded rod, a first fixing nut, a first upper locking ring, a second threaded rod, a second fixing nut, a horizontal upper locking rod and a second upper locking ring;

[0006] The first fixing nut and the second fixing nut are located on both sides of the pull-wire switch;

[0007] One end of the first threaded rod is threadedly connected to the first fixing nut, and the other end is threadedly connected to the first adjusting nut, and a first upper locking ring arranged perpendicular to the first threaded rod is fixed on the first adjusting nut;

[0008] One end of the second threaded rod is threadedly connected to the second fixing nut, and the other end is threadedly connected to the second adjusting nut;

[0009] One end of the horizontal upper locking rod is fixedly connected to the collar, and the other end is fixedly connected to the second upper locking ring. The collar is slidably mounted on the second threaded rod and is located between the second fixing nut and the second adjusting nut. The second upper locking ring is mounted outside the first threaded rod and aligned with the first upper locking ring.

[0010] Preferably, a connecting rope is slidably sleeved on the horizontal upper locking rod, a hook is connected to the connecting rope, and a warning sign is hung on the hook.

[0011] Preferably, the horizontal upper locking rod is a two-section structure hinged in the middle, and the horizontal upper locking rod is parallel to the second threaded rod after being bent at the hinge.

[0012] Preferably, the connecting rope is an elastic rope.

[0013] Preferably, the hook is provided with an anti-drop buckle.

[0014] Preferably, the first threaded rod and the second threaded rod are fully threaded rods, or stud bolts.

[0015] Preferably, the first upper locking ring and the second upper locking ring are both long strip rings.

[0016] Preferably, at least one lock is passed through the first upper locking ring and the second upper locking ring to lock the two.

[0017] Preferably, in order to more conveniently adjust the position of the first upper locking ring, the first adjusting nut can be replaced by a slip ring, and the first threaded rod can be replaced by a single-head bolt. The threaded end of the single-head bolt is threadedly connected to the first fixing nut, and the other end is fixed with a limiting rod. The limiting rod is set horizontally, and the slip ring is slidably mounted on the single-head bolt, and the first upper locking ring is fixed on the slip ring.

[0018] Compared with the prior art, the present invention has the following beneficial effects.

[0019] 1. The utility model has a simple and reliable structure, low cost, is not easy to damage, and is very convenient to use. During the locking period of the pull-wire switch, it can effectively prevent the pull-wire switch from resetting by mistake, ensuring the safety of maintenance work or emergency shutdown repair work.

[0020] 2. All parts of the utility model are detachably connected. Even if damaged, they can be easily disassembled and replaced, making maintenance work convenient and quick.

[0021] 3. In the present invention, both the first upper locking ring and the second upper locking ring are long strip rings, and multiple locks can be applied according to the maintenance grouping situation, thereby increasing the safety factor of on-site workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of Example 1 of the present utility model.

[0024] Figure 2 for Figure 1 Top view of .

[0025] Figure 3 This is a schematic diagram of the state of the horizontal upper locking rod after being bent in the utility model.

[0026] Figure 4 This is a structural diagram of the second embodiment of the present utility model.

[0027] Figure 5 This is a schematic diagram of the use state of the utility model.

[0028] In the figure: 1 is the first threaded rod, 2 is the first fixing nut, 3 is the first upper locking ring, 4 is the second threaded rod, 5 is the second fixing nut, 6 is the horizontal upper locking rod, 7 is the second upper locking ring, 8 is the first adjusting nut, 9 is the second adjusting nut, 10 is the collar, 11 is the lock, 12 is the pull-wire switch, 13 is the connecting rope, 14 is the hook, 15 is the warning sign, 16 is the slip ring, 17 is the single-head bolt, 18 is the limit rod, and 19 is the locking knob. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0031] The utility model provides the following embodiments.

[0032] Example 1

[0033] like Figure 1 、 Figure 2 As shown, the utility model is a mechanical locking device for a pull-wire switch, comprising a first threaded rod 1, a first fixing nut 2, a first upper locking ring 3, a second threaded rod 4, a second fixing nut 5, a horizontal upper locking rod 6 and a second upper locking ring 7;

[0034] The first fixing nut 2 and the second fixing nut 5 are located on both sides of the pull-wire switch 12;

[0035] One end of the first threaded rod 1 is threadedly connected to the first fixing nut 2, and the other end is threadedly connected to the first adjusting nut 8. A first upper locking ring 3 arranged perpendicular to the first threaded rod 1 is fixed on the first adjusting nut 8;

[0036] One end of the second threaded rod 4 is threadedly connected to the second fixing nut 5, and the other end is threadedly connected to the second adjusting nut 9;

[0037] One end of the horizontal upper locking rod 6 is fixedly connected to the collar 10, and the other end is fixedly connected to the second upper locking ring 7. The collar 10 is slidably mounted on the second threaded rod 4 and is located between the second fixing nut 5 and the second adjusting nut 9. The second upper locking ring 7 is mounted outside the first threaded rod 1 and aligned with the first upper locking ring 3.

[0038] A connecting rope 13 is slidably sleeved on the horizontal upper locking rod 6 , a hook 14 is connected to the connecting rope 13 , and a warning sign 15 is hung on the hook 14 .

[0039] like Figure 3 As shown, the horizontal locking rod 6 is a two-section structure hinged in the middle. After being bent at the hinge, the horizontal locking rod 6 is parallel to the second threaded rod 4. After being bent, the hook 14 can be hung on the second threaded rod 4. In this way, the longer horizontal locking rod 6 can be shortened and hung fixed, reducing the space it occupies.

[0040] The connecting rope 13 is an elastic rope.

[0041] The hook 14 is provided with an anti-drop buckle.

[0042] The first threaded rod 1 and the second threaded rod 4 are fully threaded rods or stud bolts.

[0043] The first upper locking ring 3 and the second upper locking ring 7 are both long strip rings.

[0044] At least one lock 11 is inserted into the first upper locking ring 3 and the second upper locking ring 7 to lock the two.

[0045] Example 2

[0046] like Figure 4 As shown, in this second embodiment, the first adjusting nut 8 in the first embodiment is replaced by a slip ring 16, and the first threaded rod 1 is replaced by a single-head bolt 17. One threaded end of the single-head bolt 17 is threadedly connected to the first fixing nut 2, and the other end is fixed with a limiting rod 18. The limiting rod 18 is set horizontally, and the slip ring 16 is slidably mounted on the single-head bolt 17, and the first upper locking ring 3 is fixed on the slip ring 16.

[0047] After the slip ring 16 replaces the first adjusting nut 8 and the single-head bolt 17 replaces the first threaded rod 1, the slip ring 16 is more convenient to slide on the single-head bolt 17. The horizontally arranged limit rod 18 can prevent the slip ring 16 from falling off the single-head bolt 17 on the one hand, and on the other hand, it does not affect the second upper locking ring 7 being placed on the single-head bolt 17 and aligned with the first upper locking ring 3 for locking.

[0048] The rest of the structure is the same as that of the first embodiment.

[0049] like Figure 5 As shown, the installation and use method of the first embodiment of the present invention is as follows:

[0050] After screwing the locking knob 19 of the cable switch 12 to the locked position, i.e., the horizontal position, first fix the first fixing nut 2 and the second fixing nut 5 on both sides of the cable switch 12, either to the belt conveyor bracket or the base of the cable switch 12, but their positions must be consistent with the position of the locking knob 19 on the cable switch 12. After fixing, screw one end of the first threaded rod 1 and the second threaded rod 4 into the corresponding fixing nuts. When screwing in the first threaded rod 1, you need to first find the position of the first upper locking ring 3, hold the first upper locking ring 3 with one hand, and screw in the first threaded rod 1 with the other hand so that the first upper locking ring 3 is flush with the cable switch 12. Then, the collar 10 at one end of the horizontal locking rod 6 is placed onto the second threaded rod 4, and the second locking ring 7 at the other end is placed onto the first threaded rod 4. The horizontal locking rod 6 is then placed against the pull-wire switch 12 and positioned just below the horizontal locking knob 19, locking the locking knob 19 and preventing it from rotating. The second adjusting nut 9 is then screwed onto the second threaded rod 4 until the collar 10 is tightened. The corresponding number of locks 11 are placed according to the number of inspection groups. Finally, the warning sign 15 is hung, and the utility model is locked. After a group of operators completes the inspection, they open a lock 11 until all operators have completed the inspection, just enough to open all the locks 11. The horizontal locking rod 6 is then allowed to hang naturally and bend from the central hinge. The hook 14 is then hung on the second threaded rod 4. The utility model is now unlocked and stored, and the pull-wire switch 12 is reset. For the next use, the horizontal locking rod 6 is unfolded and the second locking ring 7 is placed on the first threaded rod 1 to lock the door.

[0051] The installation and use method of the second embodiment of the present invention is basically the same as that of the first embodiment. What is more convenient is that the first upper locking ring 3 can be directly put on the single-head bolt 17 through the sliding ring 16. The position of the first upper locking ring 3 can be adjusted by sliding at will, and it will not fall out due to the limiting rod 18.

[0052] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A mechanical locking device for a pull-wire switch, characterized in that: It comprises a first threaded rod (1), a first fixing nut (2), a first upper locking ring (3), a second threaded rod (4), a second fixing nut (5), a horizontal upper locking rod (6) and a second upper locking ring (7); The first fixing nut (2) and the second fixing nut (5) are located on both sides of the pull-wire switch (12); One end of the first threaded rod (1) is threadedly connected to the first fixing nut (2), and the other end is threadedly connected to the first adjusting nut (8), and a first upper locking ring (3) arranged perpendicular to the first threaded rod (1) is fixed on the first adjusting nut (8); One end of the second threaded rod (4) is threadedly connected to the second fixing nut (5), and the other end is threadedly connected to the second adjusting nut (9); One end of the horizontal upper locking rod (6) is fixedly connected to the collar (10), and the other end is fixedly connected to the second upper locking ring (7). The collar (10) is slidably mounted on the second threaded rod (4) and is located between the second fixing nut (5) and the second adjusting nut (9). The second upper locking ring (7) is mounted outside the first threaded rod (1) and is aligned with the first upper locking ring (3).

2. A pull-wire switch mechanical locking device according to claim 1, characterized in that: A connecting rope (13) is slidably sleeved on the horizontal upper locking rod (6), a hook (14) is connected to the connecting rope (13), and a warning sign (15) is hung on the hook (14).

3. A pull-wire switch mechanical locking device according to claim 2, characterized in that: The horizontal upper locking rod (6) is a two-section structure hinged in the middle, and the horizontal upper locking rod (6) is parallel to the second threaded rod (4) after being bent at the hinge.

4. A pull-wire switch mechanical locking device according to claim 2 or 3, characterized in that: The connecting rope (13) is an elastic rope.

5. The pull-wire switch mechanical locking device according to claim 2, characterized in that: The hook (14) is provided with an anti-drop buckle.

6. The pull-wire switch mechanical locking device according to claim 1, characterized in that: The first threaded rod (1) and the second threaded rod (4) are fully threaded rods, or stud bolts.

7. The pull-wire switch mechanical locking device according to claim 1, characterized in that: The first upper locking ring (3) and the second upper locking ring (7) are both long strip rings.

8. The pull-wire switch mechanical locking device according to claim 1, characterized in that: At least one lock (11) is inserted into the first upper locking ring (3) and the second upper locking ring (7) to lock the two.

9. The pull-wire switch mechanical locking device according to claim 1, characterized in that: The first adjusting nut (8) is replaced by a slip ring (16), the first threaded rod (1) is replaced by a single-head bolt (17), one threaded end of the single-head bolt (17) is threadedly connected to the first fixing nut (2), and the other end is fixed with a limiting rod (18), the limiting rod (18) is horizontally arranged, the slip ring (16) is slidably mounted on the single-head bolt (17), and the first upper locking ring (3) is fixed on the slip ring (16).

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