A combination handle lock for preventing accidental opening of electrical control panels

Abstract

This utility model relates to the field of electrical equipment technology, specifically disclosing a combined handle lock for preventing accidental opening of electrical control panels. It includes a handle, a latch, and a warning sign mounted on the cabinet door. The handle comprises a handle base and a rotating shaft, which are detachably connected. Both the handle base and the rotating shaft have first latch holes. When the handle base is connected to the rotating shaft, the first latch holes on the handle base and the rotating shaft are aligned. The warning sign has a second latch hole. One end of the latch is inserted into the second latch hole, and the other end is used to restrict the rotation of the rotating shaft when inserted into the first latch hole. This utility model constructs an integrated forced linkage structure of warning sign-latch-handle by simultaneously inserting the latch into the rotating shaft of the handle and the warning sign, solving the problems of existing warning signs not being effective in preventing accidental opening of electrical control panels and having low reliability in safety protection.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and specifically discloses a combination handle lock for preventing accidental opening of electrical control panels. Background Technology

[0002] In electrical equipment operation and maintenance scenarios, warning signs need to be hung on adjacent operating electrical cabinets to remind operators and prevent them from accidentally entering operating electrical cabinets, thus avoiding situations such as accidental entry into the compartment or misoperation, which could lead to electrical equipment shutdown or electric shock accidents. Traditional warning signs are mostly hanging warning signs, which are easily removed or ignored, posing a risk of warning failure and failing to achieve effective isolation and protection at the physical level. Therefore, traditional warning signs have the following problems: (1) The warning signs are hung independently without mandatory association constraints, and operators may accidentally open operating electrical cabinets and enter live compartments; (2) There is a lack of physical linkage mechanism, which cannot prevent dangerous behavior from the source of operation, resulting in low reliability of safety protection. Utility Model Content

[0003] The purpose of this utility model is to provide a combination handle lock for preventing accidental opening of electrical control panels, which solves the problems that existing warning signs cannot effectively prevent accidental opening of electrical control panels and have low reliability of safety protection.

[0004] The specific solution of this utility model is as follows: A combination handle lock for an electrical control panel to prevent accidental opening, comprising: The cabinet door is equipped with a handle, a latch, and a warning sign. The handle includes a handle base and a rotating shaft. The handle base and the rotating shaft are detachably connected. Both the handle base and the rotating shaft are provided with a first latch hole. When the handle base and the rotating shaft are connected, the first latch hole on the handle base is aligned with the first latch hole on the rotating shaft. The warning sign is provided with a second latch hole. One end of the latch is inserted into the second latch hole, and the other end of the latch is used to restrict the rotation of the rotating shaft when it is inserted into the first latch hole.

[0005] In some embodiments, the handle also includes a handle and a latch. A fixing hole is provided on the cabinet door. One end of the handle seat passes through the fixing hole from the outside of the cabinet door and is detachably connected to the cabinet door. One end of the rotating shaft is fixedly connected to the handle, and the other end of the rotating shaft passes through the handle seat and is detachably connected to the latch on the inside of the cabinet door. When the rotating shaft rotates, it drives the latch to rotate.

[0006] In some embodiments, the handle further includes a fixing nut, a first external thread is provided on the outer wall of one end of the handle seat, a first internal thread is provided on the inner wall of the fixing nut to engage with the first external thread, and one end of the handle seat passes through the fixing hole from the outside of the cabinet door and is threadedly connected to the fixing nut on the inside of the cabinet door, so that the handle seat is fixedly connected to the cabinet door.

[0007] In some embodiments, the handle further includes a bolt having a second external thread, and the inner wall of the other end of the rotating shaft having a second internal thread that mates with the second external thread. The bolt is threadedly connected to the other end of the rotating shaft, so that the locking tongue is fixedly connected to the rotating shaft.

[0008] In some embodiments, the pin is square.

[0009] In some embodiments, a limit stop is provided on the pin.

[0010] In some embodiments, a limiting stop is disposed near the handle end of the pin, such that the pin includes a short side and a long side.

[0011] In some embodiments, the length of the short side of the pin is equal to the width of the handle, and the length of the long side of the pin is equal to the width of the warning sign.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. This utility model constructs an integrated forced linkage structure of warning sign, pin, and handle by simultaneously inserting a pin into the rotating shaft of the handle and the warning sign. By restricting the handle's rotation while physically binding it to the warning sign, it solves the technical defect of the lack of necessary constraint between the warning sign and handle operation, which leads to the warning sign easily becoming ineffective and the difficulty in preventing accidental opening of the electrical control panel. This achieves an upgrade in safety protection: it restricts dangerous behavior from the source of operation, ensuring that the handle cannot be turned without removing the warning sign and pulling out the pin, thus preventing the electrical control panel door from opening. This significantly reduces the probability of misoperation, effectively prevents accidental opening of the electrical control panel, effectively isolates live equipment, ensures the safety of operators, and improves the reliability of safety protection; it enhances the effectiveness of warnings: deeply binding the warning sign with the operation restriction prevents the warning sign from being ignored or removed at will, ensuring the effectiveness of the warning; and it achieves operational convenience: simply plugging and unplugging the pin is enough to switch the electrical control panel's warning isolation state and normal operation state. The structure is simple, does not require adding complex operating procedures, and is compatible with existing electrical control panel usage habits. Attached Figure Description

[0013] Figure 1 This is a front view of a combination handle lock for preventing accidental opening of an electrical control panel, as described in an embodiment of this utility model.

[0014] Figure 2 This is an exploded view of the handle in an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the pin structure in an embodiment of this utility model.

[0016] Reference numerals: 1-handle, 11-handle seat, 12-handle, 13-rotating shaft, 14-first pin hole, 15-fixing washer, 16-fixing nut, 17-locking tongue washer, 18-locking tongue, 19-bolt, 2-pin, 21-limiting stop, 3-warning sign, 31-second pin hole. Detailed Implementation

[0017] The specific implementation method is described below with reference to the accompanying drawings.

[0018] A combination handle lock for preventing accidental opening of electrical control panels, such as Figure 1 and Figure 2 As shown, it includes: a handle 1, a latch 2, and a warning sign 3 installed on the cabinet door. The handle 1 includes a handle base 11 and a rotating shaft 13. The handle base 11 and the rotating shaft 13 are detachably connected. Both the handle base 11 and the rotating shaft 13 are provided with a first latch hole 14. When the handle base 11 is connected to the rotating shaft 13, the first latch hole 14 on the handle base 11 is aligned with the first latch hole 14 on the rotating shaft 13. The warning sign 3 is provided with a second latch hole 31. One end of the latch 2 is inserted into the second latch hole 31, and the other end of the latch 2 is used to restrict the rotation of the rotating shaft 13 when it is inserted into the first latch hole 14.

[0019] The second pin hole 31 can be set in the middle of the warning sign to make the center of gravity of the warning sign more stable; the warning sign 3 can be made of corrosion-resistant metal or plastic; the surface of the warning sign can be set with the warning words "Operating equipment is prohibited" and the warning picture of prohibition of operation, so as to remind the operators through the warning words and warning pictures on the warning sign and avoid the operators from misoperating.

[0020] By simultaneously inserting pin 2 into the rotating shaft of handle 1 and warning sign 3, an integrated forced linkage structure of warning sign-pin-handle is constructed. The pin restricts handle rotation while physically binding it to the warning sign, solving the technical defect of no necessary constraint between the warning sign and handle operation, which leads to warning sign failure and difficulty in preventing accidental opening of electrical cabinets. This achieves an upgrade in safety protection: restricting dangerous behavior from the source of operation, ensuring that handle 1 cannot be turned without removing warning sign 3 and pulling out pin 2, thus preventing the electrical cabinet door from opening, significantly reducing the probability of misoperation, effectively preventing accidental opening of electrical cabinets, effectively isolating live equipment, ensuring the safety of operators, and improving the reliability of safety protection; enhancing warning effectiveness: deeply binding the warning sign with operation restrictions prevents warning sign 3 from being ignored or removed at will, ensuring the effectiveness of the warning; and achieving operational convenience: simply plugging and unplugging pin 2 is enough to switch the electrical cabinet between warning isolation and normal operation states. The structure is simple, requiring no additional complex operating procedures, and is compatible with existing electrical cabinet usage habits.

[0021] In some embodiments, the handle 1 further includes a handle 12 and a latch 18. A fixing hole is provided on the cabinet door. One end of the handle base 11 passes through the fixing hole from the outside of the cabinet door and is detachably connected to the cabinet door. One end of the rotating shaft 13 is fixedly connected to the handle 12. The other end of the rotating shaft 13 passes through the handle base 11 and is detachably connected to the latch 18 on the inside of the cabinet door. When the rotating shaft 13 rotates, it drives the latch 18 to rotate.

[0022] The first pin hole 14 can be set in the middle of the connection between the rotating shaft and the handle seat, so as to make the insertion effect better and ensure that the strength of the handle is not affected by the first pin hole.

[0023] Place the handle base 11 on the outside of the cabinet door, and connect one end of the handle base 11 to the cabinet door through the fixing hole on the outside of the cabinet door, so that the handle base 11 is fixed on the outside of the cabinet door; fix one end of the rotating shaft 13 to the handle 12, and connect the other end of the rotating shaft 13 through the other end of the handle base 11 to the locking tongue 18 on the inside of the cabinet door; when the rotating shaft 13 is connected to the handle base 11, the first pin hole 14 on the rotating shaft 13 is aligned with the first pin hole 14 on the rotating shaft 13. When the pin 2 does not pass through the first pin hole 14, turning the handle 12 can drive the rotating shaft 13 to rotate. When the rotating shaft 13 rotates, it drives the locking tongue 18 to rotate. If the locking tongue 18 rotates and is parallel to the cabinet door, the cabinet door can be unlocked. If the locking tongue 18 rotates and is perpendicular to the cabinet door, the cabinet door can be locked. This cabinet door is an outward-opening door, meaning that the cabinet door can only be opened to the outside of the electrical panel cabinet. When the pin 2 passes through the handle seat 11 and the rotating shaft 13 from the first pin hole 14, the pin 2 is perpendicularly connected to the handle 1. The pin 2 restricts the rotating shaft 13, preventing the rotating shaft 13 from rotating. The inability of the rotating shaft 13 to rotate prevents the locking tongue 18 from rotating, thus preventing the cabinet door from being opened. This effectively prevents the accidental opening of the electrical panel cabinet, effectively isolates live equipment, and ensures the safety of operators.

[0024] In some embodiments, the handle 1 further includes a fixing nut 16. A first external thread is provided on the outer wall of one end of the handle seat 11, and a first internal thread is provided on the inner wall of the fixing nut 16 to engage with the first external thread. One end of the handle seat 11 passes through the fixing hole from the outside of the cabinet door and is threadedly connected to the fixing nut 16 on the inside of the cabinet door, so that the handle seat 11 is fixedly connected to the cabinet door.

[0025] In some embodiments, the handle 1 further includes a fixing washer 15. After one end of the handle base 11 passes through the fixing hole, the fixing washer 15 and the fixing nut 16 are sequentially fitted on it. The fixing nut 16 is tightened so that the fixing washer 15 is in close contact with the cabinet door, thereby achieving a fixed connection between the handle base 11 and the cabinet door.

[0026] The cabinet door is isolated from the fixing nut 16 by the fixing shim 15, which can prevent the fixing nut 16 from damaging the cabinet door when tightening.

[0027] In some embodiments, the handle 1 further includes a bolt 19, which has a second external thread. The inner wall of the other end of the rotating shaft 13 has a second internal thread that mates with the second external thread. The bolt 19 is threadedly connected to the other end of the rotating shaft 13, so that the locking tongue 18 is fixedly connected to the rotating shaft 13. Bolt 19 can be a hexagonal head bolt with a cross-shaped groove.

[0028] In some embodiments, the handle 1 further includes a latch washer 17. The other end of the drive shaft passes through the handle seat 11 and is fitted with a latch 18 and a latch washer 17 in sequence. Then, a bolt 19 is threadedly connected to the other end of the rotating shaft 13. Tightening the bolt 19 makes both the latch washer 17 and the latch 18 fixedly connected to the rotating shaft 13. When the rotating shaft 13 is rotated, the rotating shaft 13 drives the latch 18 to rotate.

[0029] The locking tongue washer 17 isolates the bolt 19 and the locking tongue 18, preventing the bolt from damaging the locking tongue 18 during tightening, and also improving the tightening effect of the bolt 19.

[0030] In some embodiments, the pin 2 is square.

[0031] When the pin 2 is square, the corresponding first pin hole 14 and second pin hole 31 are both square. If the pin 2 and the second pin hole 31 are both round, although the pin 2 can be connected to the warning sign 3 after being inserted into the second pin hole 31, the warning sign 3 will rotate when there is wind or contact, which is not conducive to the fixation and stability of the warning sign 3. Therefore, setting the pin 2 to square can prevent the warning sign 3 from rotating and improve the stability and fixation of the warning sign 3.

[0032] In some embodiments, such as Figure 3 As shown, a limit stop 21 is provided on the pin. The limit stop 21 can prevent the pin from being fully inserted into the handle 1 or the warning sign 3, which facilitates the installation of the linkage structure of the warning sign-pin-handle.

[0033] In some embodiments, the limiting stop 21 is disposed near the handle end of the pin, such that the pin 2 includes a short side and a long side.

[0034] In some embodiments, the length of the short side of the pin is equal to the width of the handle, and the length of the long side of the pin is equal to the width of the warning sign.

[0035] Since the width of the warning sign is much longer than the width of the handle, the pin is divided into a short side and a long side by a limiting plate. The length of the short side of the pin is equal to the width of the handle, and the length of the long side of the pin is equal to the width of the warning sign. This allows the pin to quickly and effectively penetrate both the handle 1 and the warning sign 3 at the same time. Furthermore, the length of the pin is appropriate and does not waste resources, making the connection between the pin and the handle and the warning sign more stable.

[0036] The working process of a combination handle lock for preventing accidental opening of an electrical control panel: When an electrical control panel in operation requires a warning sign and the cabinet door cannot be opened, insert the long side of the pin into the second pin hole 31 to connect the pin to the warning sign, and insert the short side of the pin into the first pin hole 14 aligned with the handle base and the rotating shaft to connect the pin to the handle.

[0037] By simultaneously inserting and passing the pin 2 through the warning sign 3 and the handle 1, the operation of rotating the handle is restricted. If it is necessary to rotate the handle 1, the pin 2 must be pulled out. The pin 2 is connected to the warning sign 3. If the pin 2 is pulled out, the warning sign must be removed along with it. This creates a forced linkage that prevents the handle from being rotated without removing the warning sign. During the process of removing the warning sign, the warning words and warning pictures on the warning sign can remind the operator that the equipment is in operation, thereby preventing the accidental opening of the electrical control panel door in operation.

[0038] When operators need to open the door of an electrical control panel cabinet in operation, they pull out the pin 2 from the first pin hole and the second pin hole respectively. At the same time as pulling out the pin, the warning sign 3 is also removed. At this time, the handle 1 can be rotated normally, and the door of the electrical control panel cabinet can be opened by rotating the handle 1. After the operators finish their work, they can reinsert the pin 2 into the first pin hole 14 of the handle and the second pin hole 31 of the warning sign, that is, reinstall the warning sign 3, and restrict the rotation of the handle by the pin, restoring the warning isolation function and effectively preventing accidental opening of the electrical control panel cabinet.

[0039] This utility model is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A combination handle lock for an electrical control panel to prevent accidental opening, characterized in that, include: The cabinet door is equipped with a handle, a latch, and a warning sign. The handle includes a handle base and a rotating shaft. The handle base and the rotating shaft are detachably connected. Both the handle base and the rotating shaft are provided with a first latch hole. When the handle base is connected to the rotating shaft, the first latch hole on the handle base is aligned with the first latch hole on the rotating shaft. The warning sign is provided with a second latch hole. One end of the latch is inserted into the second latch hole, and the other end of the latch is used to restrict the rotation of the rotating shaft when it is inserted into the first latch hole.

2. The combination handle lock for preventing accidental opening of an electrical control panel as described in claim 1, characterized in that: The handle also includes a handle and a latch. The cabinet door is provided with a fixing hole. One end of the handle base passes through the fixing hole from the outside of the cabinet door and is detachably connected to the cabinet door. One end of the rotating shaft is fixedly connected to the handle, and the other end of the rotating shaft passes through the handle base and is detachably connected to the latch on the inside of the cabinet door. When the rotating shaft rotates, it drives the latch to rotate.

3. The combination handle lock for preventing accidental opening of an electrical control panel according to claim 2, characterized in that: The handle also includes a fixing nut. A first external thread is provided on the outer wall of one end of the handle seat, and a first internal thread is provided on the inner wall of the fixing nut to cooperate with the first external thread. One end of the handle seat passes through the fixing hole from the outside of the cabinet door and is threadedly connected to the fixing nut on the inside of the cabinet door, so that the handle seat is fixedly connected to the cabinet door.

4. A combination handle lock for preventing accidental opening of an electrical control panel as described in claim 3, characterized in that: The handle also includes a bolt with a second external thread, and the inner wall of the other end of the rotating shaft has a second internal thread that mates with the second external thread. The bolt is threadedly connected to the other end of the rotating shaft, so that the locking tongue is fixedly connected to the rotating shaft.

5. A combination handle lock for preventing accidental opening of an electrical control panel according to claim 1, characterized in that: The pin is square.

6. A combination handle lock for an electrical control panel as described in claim 1, characterized in that: The pin is provided with a limit stop.

7. A combination handle lock for an electrical control panel as described in claim 6, characterized in that: The limiting stop is located near the handle end of the pin, so that the pin includes a short side and a long side.

8. A combination handle lock for preventing accidental opening of an electrical control panel according to claim 7, characterized in that: The length of the short side of the pin is equal to the width of the handle, and the length of the long side of the pin is equal to the width of the warning sign.

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