Control cabinet for explosion-proof elevator

Abstract

The control cabinet for the anti-explosion elevator comprises a cabinet body, a round installation window is formed in the side face of the cabinet body, the edge of the installation window protrudes towards the outside of the cabinet body to form a first windowsill, and the periphery of the end, away from the cabinet body, of the first windowsill protrudes to form an annular second windowsill. The outer cover of the second windowsill is provided with a circular cabinet door, and the cabinet door is hermetically fixed with the second windowsill through an annular lock hoop; the cabinet door and the second windowsill are fixed together through the annular lock hoop, compared with a traditional cabinet door installation mode, the use of a large number of bolts is reduced, the cabinet door disassembly and installation speed is high, and time and labor are saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of explosion-proof elevators, in particular to a control cabinet for explosion-proof elevators. Background Art

[0002] The control cabinet is the control center of the elevator, which contains various electrical circuits such as control relays, contactors, transformers, counters, PLCs, explosion-proof safety barriers, and terminal blocks. Various signal instructions from the elevator shaft, machine room, and car enter the elevator control cabinet through various cables and are collected in the cabinet. The control cabinet stipulates various action procedures of the elevator, determines the working status, running direction, signal display, circuit protection and other functions of the elevator. The explosion-proof performance of the control cabinet must comply with standards such as GB3836.1, GB3836.2 and GB3836.4. The shell protection should not be lower than IP44 level. The insulation resistance and insulation dielectric strength should comply with the provisions of GB1497 "Basic Standards for Low-voltage Electrical Appliances". The sealing ring introduction device should meet the sealing performance and mechanical strength requirements of Article 21 of GB3836.2 standard. The sealing ring and gasket should be made of rubber products with a Shore hardness between 45 and 55 degrees and passed the aging test. The live parts in the junction box (cavity) must be sealed. The electrical clearance between the terminal and the metal casing should be greater than 8mm, the creepage distance should not be less than 10mm, the wiring in the junction box (cavity) should be firmly installed, and the terminals can withstand the torsion test requirements of the connector in Article 23 of GB3836.1. The inner wall of the junction box (cavity) and the inner wall of the main cavity should be painted with arc-resistant paint. There must be internal and external grounding and grounding labels. The internal grounding bolt should be no less than M6, and the external grounding bolt should be no less than M8. The grounding bolt should be treated with rust prevention. There should be Ex labels, nameplates and warning signs such as "open the cover after power off" on obvious parts of the shell.

[0003] Flameproof and intrinsically safe are the two most common types of explosion-proof control cabinets. Flameproof products are a type of strength-type explosion-proof products. The shell of the flameproof explosion-proof control cabinet can be cast or welded with steel plates. It is often used for explosion-proof of strong electric systems. Its shell can withstand the internal explosion of the flammable mixture that penetrates into the shell through any joint surface or structural gap of the shell without damage, and will not cause the ignition of the external explosive environment formed by one or more gases or vapors.

[0004] The Chinese utility model patent with publication number CN202098942U discloses an explosion-proof elevator control cabinet, including a box body and a cover body matched therewith, the cover body is tightly connected to the box body through a fastening connector, an elevator controller is arranged inside the box body, the fastening connector is a bolt, a base is fixedly connected to the bottom of the box body, a plurality of insulating pads are arranged at the bottom of the base, an inspection box is arranged near the top of the side wall of the box body, the inspection box is tightly connected to the box body through a seal, a reset module is arranged inside the inspection box, a monitoring module is arranged inside the box body, an alarm module is arranged inside the base, the alarm module, the reset module and the monitoring module are all electrically connected to the elevator controller, a wiring terminal is arranged on the back of the box body near the base, the wiring terminal is tightly connected to the box body through a seal, and the wiring terminal is electrically connected to the elevator controller.

[0005] The cover of this explosion-proof elevator control cabinet is installed on the box body by a large number of bolts. Although the strength of the connection is guaranteed, the speed is slow, time-consuming and labor-intensive when opening and installing the cover. Utility Model Content

[0006] The utility model aims to provide an explosion-proof elevator control cabinet to solve the problem that the cover of the explosion-proof elevator control cabinet in the prior art is installed on the box body by a large number of bolts, and the speed is slow, time-consuming and labor-intensive when opening and installing the cover.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A control cabinet for an explosion-proof elevator comprises a cabinet body, a circular installation window is provided on the side of the cabinet body, the edge of the installation window protrudes toward the outside of the cabinet body to form a first window edge, the first window edge protrudes away from the outer periphery of one end of the cabinet body to form an annular second window edge, the outer cover of the second window edge is provided with a circular cabinet door, and the cabinet door is sealed and fixed to the second window edge by an annular locking hoop.

[0009] The utility model provides a cabinet body for installing a control circuit of an explosion-proof elevator, and the control circuit of the explosion-proof elevator is installed in the cabinet body through an installation window; a cabinet door is provided for sealing the installation window to isolate the space inside and outside the cabinet body, thereby playing an explosion-proof role, and also having dustproof and waterproof effects; a first window edge and a second window edge are provided so that the cabinet door can be sealed and installed on the installation window through an annular locking hoop. Compared with the traditional cabinet door installation method, the present application uses an annular locking hoop to fix the cabinet door and the second window edge together, thereby reducing the use of a large number of bolts, and the cabinet door can be quickly disassembled and installed, saving time and effort.

[0010] Specifically, the cabinet door and the second window edge are located within the ring of the annular locking hoop, and the annular locking hoop is formed by two half-ring locking hoops, the ends of the two half-ring locking hoops are fastened and fixed by bolts, and the inner side wall of the half-ring locking hoop is provided with a through fastening groove along its circumference, and the cabinet door edge and the second window edge are clamped in the fastening groove. When the two half-ring locking hoops are separated, the cabinet door edge and the second window edge can be clamped in the fastening groove, and the two half-ring locking hoops are locked and fixed to enclose the cabinet door and the second window edge, and the cabinet door and the second window edge are locked and fixed together.

[0011] Specifically, the transverse cross-section of the fastening groove is an inverted trapezoid, the second window edge forms a first slope surface that matches the shape of the fastening groove, and the cabinet door edge forms a second slope surface that matches the shape of the fastening groove. The inverted trapezoidal fastening groove presses the slope surfaces of the second window edge and the cabinet door edge. When the two ends of the two semi-ring locking hoops are connected together, the fastening groove presses the first slope surface and the second slope surface, so that the cabinet door and the second window edge are fixed together.

[0012] Furthermore, connecting blocks are provided at both ends of the semi-ring locking hoop, and connecting holes are opened on the connecting blocks. The bolts pass through the two matching connecting holes to lock and fix the ends of the two semi-ring locking hoops. The ends of the two semi-ring locking hoops are locked and fixed by the provided connecting blocks and connecting holes and the bolts, thereby locking and fixing the cabinet door on the second window sill.

[0013] Furthermore, a sealing ring is provided between the second window edge and the cabinet door, for sealing the connection between the second window edge and the cabinet door.

[0014] Furthermore, the second window edge and the sealing ring are concave at the joint to form a first annular sealing groove, and the side of the sealing ring is convex to form a first sealing portion that cooperates with the first sealing groove, thereby improving the sealing between the sealing ring and the second window edge. The first sealing groove cooperates with the first sealing portion and can also be used for positioning between the sealing ring and the second window edge, thereby facilitating the installation of the sealing ring on the second window edge.

[0015] Furthermore, the cabinet door and the sealing ring are concavely joined to form a second annular sealing groove, and the side surface of the sealing ring is convex to form a second sealing portion that cooperates with the second sealing groove, thereby improving the sealing between the sealing ring and the cabinet door. The second sealing groove cooperates with the second sealing portion and can also be used for positioning between the sealing ring and the cabinet door, thereby facilitating the installation of the cabinet door on the second window sill.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The utility model fixes the cabinet door and the second window edge together by means of an annular locking hoop. Compared with the traditional cabinet door installation method, the utility model reduces the use of a large number of bolts, and the cabinet door can be disassembled and installed quickly, saving time and effort.

[0018] (2) The utility model can effectively improve the sealing between the second window edge and the cabinet door by providing the first sealing portion and the second sealing portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a control cabinet for an explosion-proof elevator in this embodiment;

[0020] Figure 2 This is a side sectional view of a control cabinet for an explosion-proof elevator in this embodiment;

[0021] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0022] In the figure: 1, cabinet body; 2, installation window; 3, first window edge; 4, second window edge; 5, cabinet door; 6, annular locking hoop; 601, semi-annular locking hoop; 7, bolt; 8, fastening groove; 9, first slope; 10, second slope; 11, connecting block; 12, sealing ring; 13, first sealing groove; 14, first sealing part; 15, second sealing groove; 16, second sealing part; 17, foot pad; 18, handle. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-3 As shown, this embodiment provides an explosion-proof elevator control cabinet, including a cabinet body 1, the cabinet body 1 is welded from steel plates, four feet 17 are provided at the four corners of the bottom of the cabinet body 1, the feet 17 are rubber feet, and a junction box ( Figure 1 and Figure 2 The junction box is sealed with the cabinet 1, and the cabinet 1 is also provided with a grounding ( Figure 1 and Figure 2(not shown in the figure), a circular installation window 2 is provided on the side of the cabinet 1, and the edge of the installation window 2 protrudes toward the outside of the cabinet 1 to form a first circular window edge 3, and the outer periphery of the first window edge 3 away from one end of the cabinet 1 protrudes to form a ring-shaped second window edge 4, the first window edge 3 is welded to the installation window 2, and the first window edge 3 and the second window edge 4 are integrally formed, and the outer cover of the second window edge 4 is provided with a circular cabinet door 5, and the cabinet door 5 is provided with two handles 18, and the cabinet door 5 is sealed and fixed to the second window edge 4 by an annular locking hoop 6; the cabinet door 5 and the second window edge 4 are located in the ring of the annular locking hoop 6, and the annular locking hoop 6 is surrounded by two semi-ring locking hoops 601, and the ends of the two semi-ring locking hoops 601 are locked and fixed by bolts 7, and the inner side wall of the semi-ring locking hoop 601 is provided with a circumferential opening thereof. There is a through fastening groove 8, the edge of the cabinet door 5 and the second window edge 4 are clamped in the fastening groove 8, when the two half-ring locking hoops 601 are separated, the edge of the cabinet door 5 and the second window edge 4 can be clamped in the fastening groove 8, the two half-ring locking hoops 601 are locked and fixed to enclose the cabinet door 5 and the second window edge 4 are locked and fixed together; the transverse section of the fastening groove 8 is an inverted trapezoid, the second window edge 4 forms a first slope 9 that matches the shape of the fastening groove 8, the edge of the cabinet door 5 forms a second slope 10 that matches the shape of the fastening groove 8, the inverted trapezoidal fastening groove 8 presses the slopes of the second window edge 4 and the edge of the cabinet door 5, when the two ends of the two half-ring locking hoops 601 are connected together, the fastening groove 8 presses the first slope 9 and the second slope 10, so that the cabinet door 5 and the second window edge 4 are fixed together.

[0025] The utility model provides a cabinet 1 for installing a control circuit of an explosion-proof elevator, and the control circuit of the explosion-proof elevator is installed in the cabinet 1 through an installation window 2; a cabinet door 5 is provided for sealing the installation window 2, thereby isolating the inner and outer spaces of the cabinet 1, thereby playing an explosion-proof role, and having dustproof and waterproof functions; a first window edge 3 and a second window edge 4 are provided, so that the cabinet door 5 can be sealed and installed on the installation window 2 through an annular locking hoop 6. Compared with the traditional cabinet door 5 installation method, the present application uses an annular locking hoop 6 to fix the cabinet door 5 and the second window edge 4 together, thereby reducing the use of a large number of bolts 7, and the cabinet door 5 can be quickly disassembled and installed, saving time and effort.

[0026] Please continue to refer to Figure 1 Specifically, both ends of the semi-ring locking hoop 601 are provided with connecting blocks 11, and the connecting blocks 11 and the semi-ring locking hoop 601 are integrally formed. A connecting hole is opened on the connecting block 11, and the bolt 7 passes through the two matching connecting holes to lock and fix the ends of the two semi-ring locking hoops 601. Through the provided connecting blocks 11 and the connecting holes, the ends of the two semi-ring locking hoops 601 are locked and fixed in cooperation with the bolts 7, and then the cabinet door 5 is locked and fixed on the second window sill 4.

[0027] Please continue to refer to Figure 3Furthermore, a sealing ring 12 is provided between the second window edge 4 and the cabinet door 5 , and the sealing ring 12 is a rubber ring used for sealing the connection between the second window edge 4 and the cabinet door 5 .

[0028] Furthermore, the second window sill 4 and the sealing ring 12 are joined at the joint to form a first annular sealing groove 13, and the side of the sealing ring 12 is convex to form a first sealing portion 14 that cooperates with the first sealing groove 13, thereby improving the sealing between the sealing ring 12 and the second window sill 4. The first sealing groove 13 cooperates with the first sealing portion 14 and can also be used for positioning between the sealing ring 12 and the second window sill 4, thereby facilitating the installation of the sealing ring 12 onto the second window sill 4.

[0029] Furthermore, the fitting place between the cabinet door 5 and the sealing ring 12 is concave to form an annular second sealing groove 15, and the side of the sealing ring 12 protrudes to form a second sealing portion 16 that cooperates with the second sealing groove 15, thereby improving the sealing between the sealing ring 12 and the cabinet door 5. The second sealing groove 15 cooperates with the second sealing portion 16 and can also be used for positioning between the sealing ring 12 and the cabinet door 5, thereby facilitating the installation of the cabinet door 5 on the second window sill 4.

[0030] It should be noted that although the present invention is disclosed as above with specific embodiments, the above embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A control cabinet for explosion-proof elevators, characterized in that: It includes a cabinet body, a circular installation window is opened on the side of the cabinet body, the edge of the installation window protrudes toward the outside of the cabinet body to form a first window edge, the first window edge protrudes from the outer periphery of one end away from the cabinet body to form a ring-shaped second window edge, the outer cover of the second window edge is provided with a circular cabinet door, and the cabinet door is sealed and fixed to the second window edge by an annular locking hoop.

2. The explosion-proof elevator control cabinet according to claim 1, characterized in that: The cabinet door and the second window edge are located in the annular locking hoop, and the annular locking hoop is formed by two half-ring locking hoops. The ends of the two half-ring locking hoops are fastened and fixed by bolts. The inner side wall of the half-ring locking hoop is provided with a through fastening groove along its circumference, and the cabinet door edge and the second window edge are clamped in the fastening groove.

3. The explosion-proof elevator control cabinet according to claim 2, characterized in that: The transverse cross-section of the fastening groove is in an inverted trapezoidal shape, the second window edge forms a first slope surface that matches the shape of the fastening groove, and the cabinet door edge forms a second slope surface that matches the shape of the fastening groove.

4. The explosion-proof elevator control cabinet according to claim 2, characterized in that: Both ends of the semi-ring locking hoops are provided with connecting blocks, and the connecting blocks are provided with connecting holes. The bolts penetrate through two matching connecting holes to lock and fix the ends of the two semi-ring locking hoops.

5. The explosion-proof elevator control cabinet according to claim 1, characterized in that: A sealing ring is provided between the second window edge and the cabinet door.

6. The explosion-proof elevator control cabinet according to claim 5, characterized in that: The second window edge and the sealing ring are in contact with each other at a position where they are concave to form a first annular sealing groove, and the side surface of the sealing ring is convex to form a first sealing portion that cooperates with the first sealing groove.

7. The explosion-proof elevator control cabinet according to claim 5, characterized in that: The joint between the cabinet door and the sealing ring is concave to form an annular second sealing groove, and the side surface of the sealing ring is convex to form a second sealing part that cooperates with the second sealing groove.

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