CN219262019U

CN219262019U - Explosion-proof safety switch

Info

Publication number: CN219262019U
Application number: CN202223294530.0U
Authority: CN
Inventors: 陈红; 程海龙; 张昌勇; 付良灿; 王德飞
Original assignee: Kensais Explosion Proof Technology Suzhou Co ltd
Current assignee: Kensais Explosion Proof Technology Suzhou Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-06-27
Anticipated expiration: 2032-12-08

Abstract

The utility model provides an explosion-proof safety switch, including the shell, the fixed coil that sets up in the shell, the electromagnetic lock pole that sets up in the coil that slides, the tapered end, the shell is the explosion-proof shell that has the sealed chamber, the tapered end stretches into the sealed intracavity through the cylinder flame proof faying face, the inner end of tapered end and the detachable connection of an end of electromagnetic lock pole, form a straight sliding track line between tapered end and the shell, and also form a motion track line between electromagnetic lock pole and the coil, through the detachable connection of an inner end of tapered end and an end of electromagnetic lock pole, can make the position cooperation fault tolerance between tapered end and the electromagnetic lock pole higher, even two track lines are different axi, also can make the smooth and easy synchronous slip of tapered end and electromagnetic lock pole. The electromagnetic lock rod is arranged in the sealing cavity of the shell, spark generated in the moment of electrifying the electromagnetic lock rod can not influence the outside of the shell, and the lock head arranged on the shell can still smoothly control the electromagnetic lock rod to slide through cylinder explosion suppression, so that the electromagnetic lock rod meets the explosion-proof requirement and is suitable for explosion-proof occasions.

Description

Explosion-proof safety switch

Technical Field

The utility model relates to an explosion-proof safety switch.

Background

The safety switch in the prior art is mostly civil, and as provided by patent publication No. CN205502782U, the safety switch comprises an electromagnet, a lock tongue and a turning plate, wherein the electromagnet is positioned in a shell, the lock tongue is inserted into the electromagnet, a spring is arranged on the lock tongue, a limiting plate connected with the shell is arranged on the spring, a fixed support is arranged on the shell, the fixed support is connected with the turning plate through a turning device, the head of the lock tongue is inserted into the turning plate, the electromagnet is electrified to generate magnetic force to adsorb the lock tongue to move downwards, unlocking is completed, the electromagnet is powered off, the lock tongue resets, and the manual door closing drives the turning plate to complete locking.

The electromagnetic lock does not need to consider sparks generated at the moment of electrifying the electromagnet, and cannot meet the explosion-proof requirement.

Disclosure of Invention

The utility model aims to provide an explosion-proof safety switch.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an explosion-proof safety switch, includes the shell, fixed set up in coil in the shell, slide set up in electromagnetic lock pole, tapered end in the coil, the shell is the explosion-proof shell that has the sealed chamber, the tapered end stretches into through the cylinder flame proof faying face in the sealed chamber, the inner tip of tapered end with an tip detachable of electromagnetic lock pole is connected. A straight sliding track line is formed between the lock head and the shell after cylindrical explosion isolation is adopted between the lock head and the shell, a moving track line is also formed between the electromagnetic lock rod and the coil, and the lock head and the electromagnetic lock rod can smoothly and synchronously slide through the detachable connection of the inner end part of the lock head and one end part of the electromagnetic lock rod, so that the position matching fault tolerance between the lock head and the electromagnetic lock rod is higher, and even if the two track lines are not coaxial.

In some embodiments, the inner end of the lock head is detachably connected with one end of the electromagnetic lock rod through a hasp structure or a mortise-tenon structure.

In some embodiments, a coupling is disposed between an inner end of the lock and an end of the electromagnetic lock rod, the coupling includes a first slot that is opened upward or downward and a second slot that is opened upward or downward, the inner end of the lock is movably clamped in the first slot, and an end of the electromagnetic lock rod is movably clamped in the second slot. The inner end of the lock head is in clearance fit with the coupler, and one end of the electromagnetic lock rod is in clearance fit with the coupler, so that the position fit fault tolerance between the lock head and the electromagnetic lock rod is higher.

In some embodiments, the explosion-proof safety switch further comprises a signal feedback device arranged in the sealing cavity, and the signal feedback device is connected with the electromagnetic lock rod.

In certain embodiments, the signal feedback device is a travel switch.

In certain embodiments, the explosion proof safety switch further comprises an explosion proof glan head for guiding the wire connection terminal of the coil out of the sealed cavity.

In some embodiments, the explosion-proof safety switch further comprises an elastic member disposed in the sealed cavity to enable the electromagnetic lock rod to have an outward popup trend.

The scope of the present utility model is not limited to the specific combination of the above technical features, but also covers other technical features formed by any combination of the above technical features or their equivalents. Such as those described above, and those disclosed in the present application (but not limited to) having similar functions, are replaced with each other.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model provides an explosion-proof safety switch, an electromagnetic lock rod is arranged in a sealing cavity of a shell, spark generated at the moment of electrifying the electromagnetic lock rod can not influence the outside of the shell, a lock head arranged on the shell can still smoothly control the electromagnetic lock rod to slide through cylinder explosion suppression, the explosion-proof safety switch meets the explosion-proof requirement, and the explosion-proof safety switch is suitable for explosion-proof occasions.

Drawings

FIG. 1 is a front view of an explosion proof safety switch;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the explosion-proof safety switch with the explosion-proof cover removed;

wherein, 1, a shell; 11. sealing the cavity; 12. an explosion-proof main case; 13. an explosion-proof cover; 2. a coil; 3. an electromagnetic lock rod; 4. a lock head; 5. a coupling; 51. a first clamping groove; 52. a second clamping groove; 6. a signal feedback device; 7. explosion-proof gram head.

Detailed Description

The explosion-proof safety switch comprises an explosion-proof shell 1 with a sealing cavity 11, a coil 2 fixedly arranged in the shell 1, an electromagnetic lock rod 3 slidingly arranged in the coil 2, and a lock head 4, wherein the lock head 4 stretches into the sealing cavity 11 through a cylindrical explosion-proof joint surface, and the inner end part of the lock head 4 is detachably connected with one end part of the electromagnetic lock rod 3.

Because the lock head 4 and the shell 1 are in precise sliding fit through the cylindrical explosion-proof joint surface, the inner end part of the lock head 4 is connected and matched with one end part of the electromagnetic lock rod 3 according to actual conditions, so that the lock head 4 and the electromagnetic lock rod 3 can still smoothly keep synchronous movement even if the axis of the electromagnetic lock rod 3 is not coincident with the axis of the lock head 4. The inner end of the lock head 4 is detachably connected with one end of the electromagnetic lock rod 3 through a hasp structure or a mortise and tenon structure.

In this embodiment, the inner end of the lock 4 is detachably connected with one end of the electromagnetic lock rod 3 through the coupling 5, the coupling 5 includes a first clamping groove 51 that is opened upward or downward and a second clamping groove 52 that is opened upward or downward, the inner end of the lock 4 can be movably clamped in the first clamping groove 51, one end of the electromagnetic lock rod 3 can be movably clamped in the second clamping groove 52, the inner end of the lock 4 is in clearance fit with the coupling, one end of the electromagnetic lock rod 3 is also in clearance fit with the coupling, and the inner end of the lock 4 and one end of the electromagnetic lock rod 3 have a certain movable space in the coupling 5, so that the position fit fault tolerance between the lock and the electromagnetic lock rod is higher.

The explosion-proof safety switch further comprises a signal feedback device 6 disposed in the sealed cavity 11, and in this embodiment, the signal feedback device 6 is a travel switch, such as a contactless travel switch.

The explosion-proof safety switch further comprises an elastic member disposed in the sealing cavity 11 and capable of making the electromagnetic lock rod 3 have an outward spring trend, for example, in this embodiment, the elastic member is disposed between the signal feedback device 6 and the electromagnetic lock rod 3.

The explosion-proof safety switch further comprises an explosion-proof glan 7 for leading out the wiring of the coil 2 and the wiring of the signal feedback device 6 from the sealed cavity 11.

In order to make the description of the scheme clearer, the scheme is applied to the safety door of the explosion-proof machining equipment, and the working principle is as follows:

under the locking position of the explosion-proof safety switch, referring to the background technology, the manual door closing drives the turning plate, the lock head is inserted into the turning plate, meanwhile, the lock head overcomes the elastic piece to move backwards for a certain distance, the signal feedback device 6 senses the position change of the lock head and transmits a signal that the door is locked to an external PLC, the PLC controls the coil to be not powered, and the PLC controls the explosion-proof machining equipment to work;

when the processing is finished, the PLC controls the coil to be powered on instantly, the electromagnetic lock rod continuously overcomes the elastic piece to move backwards for a certain distance in a large extent under the condition that the coil is powered on to generate suction force, at the moment, the lock head withdraws from the turning plate, the safety door can be opened, and the lock head is completely ejected under the cooperation of the electromagnetic lock rod and the elastic piece;

when the door is opened by abnormal external force in the processing process, under the cooperation of the electromagnetic lock rod and the elastic piece, the lock head is completely popped up, the signal feedback device 6 senses the position change of the lock head, and the signal that the door is unlocked is transmitted to an external PLC, so that the PLC can control the processing to be stopped emergently, and the use is safer.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims

1. The utility model provides an explosion-proof safety switch, includes shell (1), fixed set up in coil (2) in shell (1), slip set up in electromagnetic lock pole (3) in coil (2), its characterized in that: the anti-explosion electromagnetic lock rod is characterized by further comprising a lock head (4), wherein the shell (1) is an anti-explosion shell (1) with a sealing cavity (11), the lock head (4) stretches into the sealing cavity (11) through a cylindrical anti-explosion joint surface, and the inner end part of the lock head (4) is detachably connected with one end part of the electromagnetic lock rod (3).

2. The explosion-proof safety switch of claim 1, wherein: the inner end of the lock head (4) is detachably connected with one end of the electromagnetic lock rod (3) through a hasp structure or a mortise-tenon structure.

3. The explosion-proof safety switch of claim 1, wherein: the electromagnetic locking device is characterized in that a coupling (5) is arranged between the inner end part of the locking head (4) and one end part of the electromagnetic locking rod (3), the coupling (5) comprises a first clamping groove (51) which is formed in an upward or downward mode and a second clamping groove (52) which is formed in an upward or downward mode, the inner end part of the locking head (4) can be movably clamped in the first clamping groove (51), and one end part of the electromagnetic locking rod (3) can be movably clamped in the second clamping groove (52).

4. The explosion-proof safety switch of claim 1, wherein: the explosion-proof safety switch further comprises a signal feedback device (6) which is arranged in the sealing cavity (11) and used for acquiring the position information of the electromagnetic lock rod (3).

5. The explosion-proof safety switch according to claim 4, wherein: the signal feedback device (6) is a travel switch.

6. The explosion-proof safety switch according to claim 4, wherein: the explosion-proof safety switch further comprises an explosion-proof gram head (7) used for leading out the wiring of the coil (2) and the wiring of the signal feedback device (6) from the sealing cavity (11).

7. The explosion-proof safety switch of claim 1, wherein: the explosion-proof safety switch further comprises an elastic piece which is arranged in the sealing cavity (11) and can enable the electromagnetic lock rod (3) to have an outward popup trend.