Cable chamber door interlocking mechanism of upper isolation environment-friendly cabinet
By designing a cable door chain mechanism including a locking seat, a pin, a locking buckle, an unlocking handle, a locking lever and a return spring, the locking lever on the shaft is controlled by the circuit breaker opening and closing position indication position of the circuit breaker. The release state solves the problem that the cable room door cannot be opened safely when the circuit breaker is closed during the isolation environmental protection cabinet, and realizes the function of automatically locking and unlocking the cable room door according to the circuit breaker's opening and closing status.
Patent Information
- Application Number
- CN202421209586.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-30
AI Technical Summary
In the prior art, there is no suitable cable room door chain mechanism for the upper isolation environmental protection cabinet that is connected according to the circuit breaker's opening and closing state, resulting in the inability to ensure the safety of the cable room door when the circuit breaker is closed.
A cable door chain mechanism including a locking seat, a pin, a locking buckle, an unlocking handle, a locking lever and a return spring is designed, and the locking lever on the shaft is controlled by the circuit breaker opening and closing position indicator. The release state enables the cable chamber door to be chained according to the circuit breaker opening and closing state.
When the circuit breaker is closed, the cable room door can be opened safely, while when the circuit breaker is opened, the cable room door is automatically locked to prevent accidental opening, thereby improving the safety and reliability of the equipment.
Smart Images
Figure CN222514842U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a security measure for a switch cabinet used for power supply of a public power grid, in particular to a cable room door interlocking mechanism of an upper isolation environmental protection cabinet. Background Art
[0002] The existing switch cabinets for public power grid power supply are called environmental protection cabinets, which have the function of protecting the interior of high-voltage electrical equipment, preventing the intrusion of external substances, and ensuring the normal operation of the equipment. The cable room door of the environmental protection cabinet (i.e., the lower door of the environmental protection cabinet) must be opened to ensure that there will be no short circuit or electric shock caused by misoperation, equipment damage, casualties and other accidents. Therefore, the mechanism room of the environmental protection cabinet is generally equipped with a cable room door interlocking mechanism to interlock the cable room door of the environmental protection cabinet. Among them, the structural feature of the upper isolation environmental protection cabinet is the upper isolation three-position switch above the circuit breaker, and its bus side combined function connects the grounding switch. The cable room door of the environmental protection cabinet with this connection structure can only be opened when the circuit breaker is in the closed state, but there is currently no suitable cable room door interlocking mechanism that interlocks according to the circuit breaker opening and closing state.
[0003] The structural feature of the lower isolation environmental protection cabinet in the current industry is that the lower isolation three-position switch is located below the circuit breaker, and its cable side combined function is connected to the grounding switch. The cable room door of the environmental protection cabinet with this connection structure can only be opened when the grounding switch is closed. At present, there is a ready-made cable room door interlocking mechanism that is interlocked according to the open and close state of the grounding switch. However, this prior art does not belong to the same structural type as the utility model. Utility Model Content
[0004] In order to overcome the problem that the current upper isolation environmental protection cabinet has no applicable cable room door interlocking mechanism that can be interlocked according to the opening and closing status of the circuit breaker, the purpose of the utility model is to provide an improved cable room door interlocking mechanism for the upper isolation environmental protection cabinet, which can overcome the defects of the prior art.
[0005] The technical solution adopted by the utility model to solve its technical problems is: a cable room door interlocking mechanism of an upper isolation environmental protection cabinet, comprising a lock seat, a pin shaft, a lock, an unlocking handle, a locking rod and a return spring, wherein the lock seat is installed in the mechanism room of the environmental protection cabinet, the pin shaft is matched on the lock seat, the lock is rotatably matched on the pin shaft and its lower lock hook is pressed and matched with the clamping port on the top side of the cable room door of the environmental protection cabinet, the unlocking handle passes through the front side slot of the lock seat from its rear and is fixed to the driving end of the lock, and the locking rod is vertically slidably matched in the ring The rod seat in the mechanism chamber of the safe is on a rod seat and its lower end is matched on the interlocking plane of the lock, and the return spring is sleeved on the interlocking rod. It is characterized in that: the lock seat is installed directly below the circuit breaker opening and closing position indicating shaft in the mechanism chamber, and the circuit breaker opening and closing position indicating shaft is provided with an interlocking crank arm plate. When the circuit breaker opening and closing position indicating shaft is in the opening position, the outer end of the interlocking crank arm plate presses against the upper end surface of the interlocking rod, and when the circuit breaker opening and closing position indicating shaft is in the closing position, the outer end of the interlocking crank arm plate releases the upper end surface of the interlocking rod.
[0006] The pin shaft in the above technical solution may be sleeved with a return torsion spring of the lock buckle.
[0007] The return spring in the above technical solution may have its lower end pressed against the convex ring of the locking rod and its upper end pressed against the rod seat.
[0008] The unlocking handle of the above technical solution is provided with a shielding member for shielding the unlocking handle panel slot on the mechanism chamber panel of the environmental protection cabinet, and the shielding member has a front shielding plate, a left connecting plate and a right connecting plate. The front shielding plate is slidably fitted on the unlocking handle through the handle hole thereon, and the left connecting plate and the right connecting plate are slidably fitted on the left and right sides of the pin shaft through the left and right long holes thereon. The function of the shielding member is that when the unlocking handle moves up and down in the unlocking handle slot, the shielding member will follow the unlocking handle on the rear side of the environmental protection cabinet mechanism chamber panel to move up and down vertically synchronously, shielding the exposed part of the unlocking handle slot, so as to meet the IP4X housing protection level requirements of the new national standard.
[0009] The beneficial effect of the utility model is that: since the lock seat is installed directly below the circuit breaker opening and closing position indicating shaft in the mechanism chamber, a locking crank arm plate is provided on the circuit breaker opening and closing position indicating shaft, and when the circuit breaker opening and closing position indicating shaft is in the opening position, the outer end of the locking crank arm plate abuts against the upper end surface of the locking rod, and when the circuit breaker opening and closing position indicating shaft is in the closing position, the outer end of the locking crank arm plate releases the upper end surface of the locking rod, so when the circuit breaker is closed, the upper end surface of the locking rod is in a released state, and the unlocking handle can be operated at this time to make the card press fit in the ring The lower lock hook of the lock on the top side clamping opening of the cable room door of the safe leaves the top side clamping opening of the cable room door, and the cable room door of the environmental protection cabinet can be lifted up and opened. When the circuit breaker is opened, the outer side of the interlocking crank arm plate on the opening and closing position indicating shaft of the circuit breaker presses against the upper end surface of the interlocking rod. At this time, the unlocking handle is stuck and cannot be operated, and the lower side lock hook of the lock presses against the top side clamping opening of the cable room door. At this time, the cable room door of the environmental protection cabinet cannot be lifted up and opened, thereby realizing the functional effect of the utility model for interlocking the cable room door of the upper isolation environmental protection cabinet according to the opening and closing status of the circuit breaker.
[0010] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model.
[0012] Figure 2 yes Figure 1 An enlarged stereoscopic view of the lock seat, pin shaft, lock, unlocking handle and shielding member, wherein the shielding member is separated from other components.
[0013] In the figure: 1. Lock seat; 2. Pin shaft; 3. Lock; 4. Unlocking handle; 5. Interlocking rod; 6. Return spring; 7. Lower lock hook; 8. Front slot; 9. Rod seat; 10. Lower end of interlocking rod; 11. Interlocking plane; 12. Circuit breaker opening and closing position indicator shaft; 13. Interlocking crank arm plate; 14. Convex ring; 15. Shielding piece; 16. Front shielding plate; 17. Left connecting plate; 18. Right connecting plate; 19. Handle hole; 20. Left long hole; 21. Right long hole. DETAILED DESCRIPTION
[0014] Reference Figure 1-2The cable room door interlocking mechanism of the upper isolation environmental protection cabinet comprises a lock seat 1, a pin shaft 2, a lock 3, an unlocking handle 4, a locking rod 5 and a return spring 6, wherein the lock seat 1 is installed in the mechanism room of the environmental protection cabinet, the pin shaft 2 is matched on the lock seat 1, the lock 3 is rotatably matched on the pin shaft 2 and its lower side lock hook 7 is pressed and matched with the top side pressing port of the cable room door of the environmental protection cabinet, the unlocking handle 4 passes through the front side slot 8 of the lock seat 1 from its rear and is fixed to the driving end of the lock 3, the locking rod 5 is vertically slidably matched on the rod seat 9 in the mechanism room of the environmental protection cabinet and its lower side lock hook 7 is pressed and matched with the top side pressing port of the cable room door of the environmental protection cabinet The end 10 is matched on the interlocking plane 11 of the lock 3, and the return spring 6 is sleeved on the interlocking rod 5, which is characterized in that: the lock seat 1 is installed directly below the circuit breaker opening and closing position indicating shaft 12 in the mechanism chamber, and the circuit breaker opening and closing position indicating shaft 12 is provided with an interlocking crank arm plate 13. When the circuit breaker opening and closing position indicating shaft 12 is in the opening position, the outer end of the interlocking crank arm plate 13 presses against the upper end surface of the interlocking rod 5, and when the circuit breaker opening and closing position indicating shaft 12 is in the closing position, the outer end of the interlocking crank arm plate 13 releases the upper end surface of the interlocking rod 5.
[0015] In addition, the pin shaft 2 is sleeved with a return torsion spring (not shown) of the lock buckle 3 .
[0016] The return spring 6 has its lower end pressed against the convex ring 14 of the locking rod 5 and its upper end pressed against the rod seat 9 .
[0017] The unlocking handle 4 is provided with a shielding member 15 for shielding the unlocking handle panel slot on the mechanism chamber panel of the environmental protection cabinet. The shielding member 15 has a front shielding plate 16, a left connecting plate 17 and a right connecting plate 18. The front shielding plate 16 is slidably fitted on the unlocking handle 4 through the handle hole 19 thereon, and the left connecting plate 17 and the right connecting plate 18 are slidably fitted on the left and right sides of the pin shaft 2 through the left long hole 20 and the right long hole 21 thereon respectively.
Claims
1. A cable room door interlock mechanism of an upper isolation environmental protection cabinet, comprising a lock seat, a pin shaft, a lock, an unlocking handle, a locking rod and a return spring, wherein the lock seat is installed in the mechanism room of the environmental protection cabinet, the pin shaft is matched on the lock seat, the lock is rotatably matched on the pin shaft and its lower lock hook is pressed with the top side clamping mouth of the cable room door of the environmental protection cabinet, the unlocking handle passes through the front side slot of the lock seat from its rear and is fixed to the driving end of the lock, the locking rod is vertically slidably matched on the rod seat in the mechanism room of the environmental protection cabinet and its lower end is matched on the locking plane of the lock, the return spring is sleeved on the locking rod, and is characterized in that: The locking seat is installed directly below the circuit breaker opening and closing position indicating shaft in the mechanism chamber. The circuit breaker opening and closing position indicating shaft is provided with a locking crank arm plate. When the circuit breaker opening and closing position indicating shaft is in the opening position, the outer end of the locking crank arm plate presses against the upper end surface of the locking rod. When the circuit breaker opening and closing position indicating shaft is in the closing position, the outer end of the locking crank arm plate releases the upper end surface of the locking rod.
2. The cable room door interlocking mechanism of the upper isolation environmental protection cabinet according to claim 1 is characterized in that: The pin shaft is sleeved with a return torsion spring of the lock buckle.
3. The cable room door interlocking mechanism of the upper isolation environmental protection cabinet according to claim 1 or 2 is characterized in that: The return spring has its lower end pressed against the convex ring of the locking rod and its upper end pressed against the rod seat.
4. The cable room door interlocking mechanism of the upper isolation environmental protection cabinet according to claim 1 or 2 is characterized in that: The unlocking handle is provided with a covering piece for covering the unlocking handle panel slot hole on the mechanism chamber panel of the environmental protection cabinet, and the covering piece has a front covering plate, a left connecting plate and a right connecting plate. The front covering plate is slidably fitted on the unlocking handle through the handle hole thereon, and the left connecting plate and the right connecting plate are slidably fitted on the left and right sides of the pin shaft through the left long holes and the right long holes thereon.