Switchgear grounding mechanism cross-screen interlocking device

Abstract

The present invention discloses a cross-screen interlocking device for a switch cabinet grounding mechanism, and relates to the technical field of interlocking devices. The cross-screen interlocking device for the switch cabinet grounding mechanism comprises the following components: a gear assembly, a screen guide rod, a support, a connecting piece, a door lock mechanism and a cross-screen guide rod. The gear assembly is composed of a gear and a gear rack pair. The gear is connected with the lock head of the grounding interlocking mechanism and is installed at the end of the guide rod of the grounding interlocking device. The gear rack pair is engaged with the gear. When the grounding rocker is operated, the gear rotates with the guide rod, driving the gear rack pair to produce displacement. The closing and opening states of the grounding knife switch are converted into two different positions of the gear rack pair. One end of the screen guide rod is fixed on the gear rack pair and can move with it, and the other end is connected with the guide rod in the adjacent cabinet through a connecting piece to transmit the displacement of the gear rack pair to the adjacent cabinet. The supporting piece is installed on the cabinet, and the guide rod passes through its opening and can slide freely. The two supporting pieces can support the guide rod horizontally.

Description

Technical Field

[0001] The invention relates to the technical field of interlocking devices, and in particular to a cross-screen interlocking device for a switch cabinet grounding mechanism. Background Art

[0002] According to standard requirements, medium and high voltage switchgear must have five-protection interlocking. Currently, there are three conventional interlocking methods: mechanical interlocking, program lock, and electrical interlocking.

[0003] Mechanical interlocking is to use mechanical mechanisms that mutually restrict and link between the operating parts of switch cabinets or outdoor switches to achieve the interlocking requirements of sequential actions. Mechanical interlocking does not require the use of auxiliary operations such as keys during operation, and can be automatically unlocked step by step as the operation sequence is carried out correctly. In the event of an erroneous operation, automatic interlocking can be achieved to prevent the erroneous operation from being carried out. Mechanical interlocking can achieve forward and reverse interlocking requirements, and has the advantages of intuitive interlocking, not easy to damage, small maintenance workload, and convenient operation. However, mechanical interlocking can only be applied between mechanical action-related parts inside switch cabinets and outdoor switches, and the interlocking requirements between two cabinets or between switch cabinets and external power distribution equipment and between outdoor switches and switches (other switches) are also out of reach. Therefore, on switch cabinets and outdoor switches, only mechanical interlocking can be used as the main method, and other interlocking methods must be supplemented to meet all five protection requirements.

[0004] Program locks (or mechanical program locks) use keys to pass or replace along with the operating procedures to achieve the requirements of sequential unlocking operations. Its biggest advantage is that key transfer is not limited by distance. During the operation process, program locks have auxiliary actions such as key transfer and key quantity change, which meet the requirements of the operation sequence of the unlocking conditions specified in the operation ticket and are completely consistent with the walking route specified in the operation ticket. However, keys are often lost during the transfer process, and master keys also need special management. In addition, for institutions with more unlocking conditions, professional personnel are required to interpret the operation ticket, and the operation steps are complicated.

[0005] The electrical interlocking realizes the unlocking operation through the electromagnetic mechanism of the electromagnetic coil. It is an indispensable interlocking element in the interlocking link to prevent the accidental entry into the energized interval. The advantages of electrical interlocking are easy operation and no auxiliary action, but there are also the following prominent problems in installation and use: ① Generally speaking, when the electromagnetic lock is used alone, it only has the unlocking function but no reverse interlocking function. It needs to be used in conjunction with the electrical interlocking circuit to have the forward and reverse interlocking function; ② The electromagnetic lock as an interlocking element has a complex structure, and the electromagnetic coil is easily damp and mildewed outdoors, the insulation performance is reduced, and the failure rate of the DC system is increased; ③ Cables need to be laid, which increases the additional construction volume; ④ The auxiliary contacts of the operating mechanism need to be connected in series. According to operating experience, the auxiliary contacts are prone to poor contact and affect the reliability of the action; ⑤ There is generally a lack of interlocking measures on the control switch of the circuit breaker.

[0006] Therefore, all of the above three conventional interlocks have various problems, and a new interlocking device is urgently needed. Summary of the invention

[0007] An embodiment of the present invention provides a cross-screen interlocking device for a switch cabinet grounding mechanism in order to solve the above-mentioned technical problems.

[0008] In order to achieve the above object, the embodiment of the present invention adopts the following technical solution:

[0009] A cross-screen interlocking device for a switch cabinet grounding mechanism comprises the following components: a gear assembly, a screen guide rod, a support, a connecting piece, a door lock mechanism and a cross-screen guide rod, wherein the gear assembly consists of a gear and a gear rack pair, the gear is connected to the lock head of the grounding interlocking mechanism and is installed at the end of the guide rod of the grounding interlocking device; the gear rack pair meshes with the gear, and when the grounding rocker is operated, the gear rotates with the guide rod, driving the gear rack pair to produce displacement; the closing and opening states of the grounding knife switch are converted into two different positions of the gear rack pair; one end of the screen guide rod is fixed to the gear rack pair and can move with it, and the other end is connected to the guide rod in the adjacent cabinet through a connecting piece, so as to transmit the displacement of the gear rack pair to the adjacent cabinet; the supporting piece is installed on the cabinet, the guide rod passes through its opening and can slide freely, and the two supporting pieces can move the guide rod water Flat support; the connecting piece is composed of a sleeve and a fastening screw, and the screen guide rod and the cross-screen guide rod are inserted into the sleeve and fastened with screws; this structure can fine-tune the position of the door lock mechanism by adjusting the guide rod connection position to achieve the interlocking component in place; the door lock mechanism is composed of a positioning piece, a sliding tongue lock, a stopper, and a torsion spring; the positioning piece is installed on the cabinet frame and has a square hole to support and position the sliding tongue lock, and the sliding tongue lock can move in the square hole; the stopper can be positioned at the bending part of the positioning piece, and the sliding tongue lock is fixed on the guide rod and can move horizontally with the guide rod, and its protruding part can interlock or unlock the door panel by moving; the stopper is sleeved on the guide rod and moves with the guide rod, and it can rotate on the vertical plane of the guide rod axis; the torsion spring connects the sliding tongue lock and the stopper to subject the stopper to force; the cross-screen guide rod is installed in multiple adjacent screens, and multiple screens can be interlocked by connecting them to each other.

[0010] The beneficial effects of the present invention are as follows: the cross-screen interlocking device of the switch cabinet grounding mechanism provided by the embodiment of the present invention has the following beneficial effects:

[0011] 1. Simple and reliable structure, easy to install.

[0012] This device has a simple structure, no lossy parts, does not require frequent maintenance, and can be adjusted according to the assembly quality to make the interlock more reliable. It can be directly installed without changing the original interlocking mechanism.

[0013] 2.Multi-screen interlocking can be realized as needed.

[0014] Each screen can be arbitrarily combined into multi-screen interlocking by simply adding a cross-screen guide rod and a door lock mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art or ordinary technicians, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a cross-screen interlocking device for a switch cabinet grounding mechanism provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of a gear assembly of a cross-screen interlocking device for a switch cabinet grounding mechanism provided by an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of the connecting piece of the cross-screen interlocking device of the switch cabinet grounding mechanism provided by an embodiment of the present invention;

[0019] Figure 4a A schematic diagram of the door lock structure of the cross-screen interlocking device of the switch cabinet grounding mechanism provided by an embodiment of the present invention;

[0020] Figure 4b A schematic diagram of the door lock mechanism structure of the cross-screen interlocking device of the switch cabinet grounding mechanism provided by an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the installation configuration of the cross-screen interlocking device of the switch cabinet grounding mechanism provided in an embodiment of the present invention.

[0022] In the figure: 1-gear assembly 2-screen guide rod 3-support member 4-connecting member 5-door lock mechanism 6-cross-screen guide rod 7-gear 8-rack pair 9-connecting sleeve 10-fastening screw 11-positioning member 12-sliding tongue lock member 13-stopper 14-torsion spring 15-support member. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4a , Figure 4b and Figure 5 The embodiment of the present invention provides a cross-screen interlocking device for the grounding mechanism of a switch cabinet, comprising the following components: a gear assembly 1, a screen guide rod 2, a support member 3, a coupling member 4, a door lock mechanism 5 and a cross-screen guide rod 6, wherein the gear assembly 1 is composed of a gear 7 and a rack pair 8, wherein the gear 7 is connected to the lock head of the grounding interlocking mechanism and is installed at the end of the guide rod of the grounding interlocking device; the rack pair 8 is engaged with the gear 7, and when the grounding rocker is operated, the gear 7 rotates with the guide rod, driving the rack pair 8 to produce displacement; the closing and opening states of the grounding knife switch are converted into two different positions of the gear 7 and the rack pair 8; one end of the screen guide rod 2 is fixed on the rack pair 8 and can move with it, and the other end is connected to the guide rod in the adjacent cabinet through the coupling member 4, so as to transmit the displacement of the rack pair 8 to the adjacent cabinet; the support member is installed on the cabinet, the guide rod passes through its opening and can slide freely, and the two support members can support the guide rod horizontally; the coupling member The connecting piece is composed of a sleeve and a fastening screw. The screen guide rod 2 and the cross-screen guide rod 6 are inserted into the sleeve and fastened with screws. This structure can fine-tune the position of the door lock mechanism by adjusting the connecting position of the guide rod to achieve the interlocking parts in place. The door lock mechanism 5 is composed of a positioning piece 11, a sliding tongue lock piece 12, a stopper 13, and a torsion spring 14. The positioning piece 11 is installed on the cabinet frame and has a square hole to support and position the sliding tongue lock piece 12. The sliding tongue lock piece 12 can be in the square hole. The blocking member 13 can be positioned at the bend of the blocking member 11, and the sliding tongue lock member 12 is fixed on the guide rod and can move horizontally with the guide rod, and its protruding part can interlock or unlock the door panel by moving; the blocking member 13 is sleeved on the guide rod and moves with the guide rod, and can rotate on the vertical plane of the guide rod axis; the torsion spring 14 connects the sliding tongue lock member 12 and the blocking member 13, so that the blocking member 13 is subjected to force; the cross-screen guide rod 6 is installed in multiple adjacent screens, and multiple screens can be interlocked by connecting them to each other.

[0025] The cross-screen interlocking device of the switch cabinet grounding mechanism provided by the embodiment of the present invention has the following characteristics: 1. The grounding switch state is converted into displacement by using gears and gear rack pairs; 2. The interlocking displacement is transmitted by using guide rods; 3. The connecting piece can adjust the connection position of the guide rod; 4. The door lock mechanism adopts a movable tongue for locking; 5. The door lock mechanism has the function of preventing the grounding switch from being accidentally closed when the door is open.

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] First, an embodiment of the present invention provides a device for interlocking a switch cabinet grounding mechanism across a panel. The following describes the installation steps of the device for interlocking a switch cabinet grounding mechanism across a panel, including the installation position, the hole opening position, and the additional components.

[0028] (1) Install the gear assembly 1;

[0029] Remove the door lock component on the guide rod of the main bus grounding device, replace it with the gear 7 of this device, and open and close the grounding knife to test whether the original interlock is intact.

[0030] (2) Install the support;

[0031] According to the meshing position of gear 7 and rack pair 8, determine the vertical height of support member 3, and then determine the horizontal position according to the displacement of rack pair 8. Fix support member 3 on the columns on both sides of the cabinet frame. If the column is not wide enough, install a crossbeam to fix it.

[0032] (3) Install the door lock mechanism;

[0033] According to the vertical height of the guide rod, determine the vertical position of the blocking piece 11, and then determine the appropriate horizontal position according to the fitting surface between the door panel and the frame. Open two square holes on the frame, one for the sliding tongue to extend, the size of the square hole is determined according to the size and displacement of the sliding tongue lock 12, and the other square hole for the protrusion on the door panel to extend into and press the stopper 13, the size of the hole is determined according to the displacement of the sliding tongue and the thickness of the protrusion; open a square hole on the door panel and install the protrusion, and ensure that the two holes can overlap after the door is closed, and the protrusion can pass through the frame. Install the blocking piece 11 according to the position of the hole.

[0034] (4) Install the guide rod;

[0035] The rack pair 8, the sliding tongue lock 12, the stopper 13, and the torsion spring 14 are fixed to the two guide rods respectively, and then the guide rods pass through the support member 3 and are placed in place, and the connecting member 4 is placed at the connection.

[0036] (5) Adjust the guide rod;

[0037] Close the grounding switch, push the sliding tongue lock 12 to the unlocking position, tighten the screws of the connecting piece, open the grounding switch again, and check whether the sliding tongue lock 12 reaches the interlocking position.

[0038] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A cross-screen interlocking device for a switch cabinet grounding mechanism, characterized in that: It includes the following interlocking components: a gear assembly, a screen guide rod, a support, a connecting piece, a door lock mechanism and a cross-screen guide rod. The gear assembly is composed of a gear and a gear rack pair. The gear is connected to the lock head of the grounding interlocking mechanism and installed at the end of the guide rod of the grounding interlocking mechanism. The gear rack pair is meshed with the gear. When the grounding rocker is operated, the gear rotates with the guide rod of the grounding interlocking mechanism, driving the gear rack pair to produce displacement; the closing and opening states of the grounding knife switch are converted into two different positions of the gear rack pair; one end of the main screen guide rod is fixed on the gear rack pair and can move with the gear rack pair. The other end of the main screen guide rod is connected to the cross-screen guide rod in the adjacent cabinet through a connecting piece to transmit the displacement of the gear rack pair to the adjacent cabinet; the support member is installed on the cabinet, and the main screen guide rod and the cross-screen guide rod respectively pass through the openings of the support member and can slide freely. The two support members can respectively support the main screen guide rod and the cross-screen guide rod horizontally; the connecting member is composed of a sleeve and a fastening screw. The main screen guide rod and the cross-screen guide rod are fastened with the fastening screw after passing through the sleeve; The position of the door lock mechanism is fine-tuned by adjusting the connection position between the screen guide rod and the cross-screen guide rod to achieve the interlocking parts in place; the door lock mechanism is composed of a positioning member, a sliding tongue lock member, a stopper and a torsion spring; the positioning member is installed on the cabinet frame and has a square hole to support and position the sliding tongue lock member, and the sliding tongue lock member can move in the square hole; the stopper can be positioned at the bending part of the positioning member, and the sliding tongue lock member is fixed on the cross-screen guide rod and can move horizontally with the cross-screen guide rod, and the protruding part of the sliding tongue lock member can interlock or unlock the door panel by moving; the stopper is sleeved on the cross-screen guide rod and moves with the cross-screen guide rod, and the stopper can rotate on a vertical plane in the axial direction of the cross-screen guide rod; the torsion spring connects the sliding tongue lock member and the stopper to subject the stopper to force; the cross-screen guide rod is installed in multiple adjacent cabinets, and multiple cabinets can be interlocked by connecting them to each other.

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