Straight stroke explosion-proof switch

Abstract

The utility model discloses an explosion-proof switch applied to a straight stroke, which comprises an explosion-proof sleeve shell, a mounting through groove is arranged at the center of the upper surface of the explosion-proof sleeve shell, two normally closed contacts are fixedly arranged on one side of the inner bottom end of the mounting through groove, and two normally open contacts are fixedly arranged on the other side of the inner bottom end of the mounting through groove. When the normally-closed switch is used, a module on a moving part of a production machine is in contact with the driving transverse plate to push the pushing lantern ring to move, the reset spring is contracted, at the moment, the normally-closed communication contact plate is separated from the two normally-closed connecting guide plates, and the normally-closed contact plate is connected with the normally-closed connecting guide plates. At the moment, a circuit between the two normally-closed contacts which are originally connected is disconnected, and at the moment, a normally-closed connection contact plate makes contact with a normally-closed connection guide plate, so that the circuit between the two normally-closed contacts is connected, and control over the travel switch is conveniently completed. A connection transverse rod vertically arranged on the outer side of a reset spring in a sleeving mode is adopted in the device, and a driving transverse plate is reset; the structure is simple, and the service life is longer than that of an inclined reset spring.

Description

Technical Field

[0001] The utility model relates to the technical field of travel switches, in particular to a linear travel explosion-proof switch. Background Art

[0002] The linear travel explosion-proof switch is a specially designed switch, mainly used in environments with explosive gases or dust to ensure the safe operation of electrical equipment in these hazardous environments. Its working principle is mainly based on the basic function of the travel switch, that is, to switch the circuit according to the travel position of the moving parts. When the module on the moving parts of the production machinery hits the pre-installed travel switch, the contacts of the switch will move, thereby realizing the switching of the circuit.

[0003] Common travel explosion-proof switches generally use a bent rod as a travel contact, and two inclined springs are often used inside the bent rod to reset the bent rod. The inclined springs are easily damaged after repeated use, affecting the use of the explosion-proof switch. Therefore, a straight-travel explosion-proof switch is needed to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide a high-speed pretreatment water treatment equipment to solve the problem raised in the above background technology: the travel explosion-proof switch generally uses a bent rod as a travel contact, and two inclined springs are often used inside the bent rod to reset the bent rod. The inclined push spring is easily damaged after repeated use, which affects the use of the explosion-proof switch.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a linear explosion-proof switch, comprising an explosion-proof casing, a mounting groove is arranged at the center of the upper surface of the explosion-proof casing, two normally closed contacts are fixedly arranged on one side of the bottom end of the mounting groove, two normally open contacts are fixedly arranged on the other side of the bottom end of the mounting groove, one side of the two normally closed contacts is provided with a normally closed connecting guide plate, one side of the two normally open contacts is provided with a normally open connecting guide plate, a side of the bottom end of the mounting groove close to the normally open contact is fixedly connected with a stroke reset component, one end of the stroke reset component extends to the outside of the explosion-proof casing, an adjustment groove is arranged on the explosion-proof casing close to the stroke reset component, and two sides of the inner wall of the adjustment groove are provided Both sides are connected with closed telescopic connecting plates, the telescopic ends of the two closed telescopic connecting plates are connected to the travel reset assembly, and the upper surface of the explosion-proof casing is threadedly connected with a sealing top cover; the purpose of this arrangement is: the module on the moving part of the production machinery contacts the driving cross plate to push the propulsion ring to move, so that the reset spring contracts, and at this time the normally closed connecting touch plate is separated from the two normally closed connecting guide plates, and at this time the line between the two normally closed contacts that were originally connected is disconnected, and at this time the normally open connecting touch plate contacts the normally open connecting guide plate, so that the line between the two normally open contacts is connected, which is convenient for completing the control of the travel switch, and the device adopts a connecting cross bar vertically sleeved on the outside of the reset spring to reset the driving cross plate, and the structure is simple and the service life is longer than that of the inclined reset spring.

[0006] Preferably, the travel reset assembly comprises a mounting vertical plate, and a connecting cross bar is fixedly connected to one side of the mounting vertical plate.

[0007] Preferably, a propulsion collar is sleeved on the outer side of the connecting cross bar, and the propulsion collar is connected to the mounting vertical plate via a reset spring, and the reset spring is sleeved on the outer side of the connecting cross bar.

[0008] Preferably, a normally closed connection touch plate is fixedly connected to one side of the upper surface of the propulsion collar close to the normally closed connection guide plate, and the normally closed connection touch plate is in contact with the two normally closed connection guide plates.

[0009] Preferably, a normally-off connection touch plate is fixedly connected to the upper surface of the propulsion collar near the normally-off connection guide plate, and the normally-off connection touch plate is located between the two normally-off connection guide plates.

[0010] Preferably, the propulsion collar is fixedly connected with a driving transverse plate near the adjusting through slot, and both sides of the driving transverse plate are fixedly connected with the telescopic ends of the closed telescopic connecting plate.

[0011] Technical effects and advantages of the utility model:

[0012] (1) When the device is used, the module on the moving part of the production machinery contacts the driving cross plate and pushes the push ring to move, causing the reset spring to contract. At this time, the normally closed connecting touch plate is separated from the two normally closed connecting guide plates. At this time, the line between the two normally closed contacts that were originally connected is disconnected, and at this time, the normally open connecting touch plate contacts the normally open connecting guide plate, so that the line between the two normally open contacts is connected, which is convenient for completing the control of the travel switch. The device adopts a connecting cross bar vertically sleeved on the outside of the reset spring to reset the driving cross plate. The structure is simple and the service life is longer than that of the inclined reset spring. It solves the problem that the travel explosion-proof switch generally uses a bent rod as the travel contact, and the bent rod is mostly reset by two inclined springs. The inclined push spring is easy to be damaged after repeated use, which affects the use of the explosion-proof switch.

[0013] (2) When the driving horizontal plate in the device moves, the driving horizontal plate pulls the closed telescopic connecting plate to move with the driving horizontal plate, so that the interior of the explosion-proof housing is in a closed state. When the module on the moving part is separated from the driving horizontal plate, the push ring is reset under the push of the reset spring. At this time, the normally closed connecting contact plate contacts the two normally closed connecting guide plates, so that the line between the two normally closed contacts is connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the explosion-proof casing in the utility model;

[0016] Figure 3 It is a schematic diagram of the connection structure between the normally closed contact and the normally open contact in the utility model.

[0017] In the figure: 1. explosion-proof casing; 2. sealing top cover; 3. normally closed contact; 4. normally open contact; 5. travel reset assembly; 501. mounting vertical plate; 502. connecting cross bar; 503. reset spring; 504. pushing collar; 505. normally closed connecting touch plate; 506. normally open connecting touch plate; 507. driving cross plate; 6. normally closed connecting guide plate; 7. normally open connecting guide plate; 8. adjusting through slot; 9. closed telescopic connecting plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments 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.

[0019] The utility model provides Figure 1-3 The straight-stroke explosion-proof switch shown comprises an explosion-proof casing 1, a mounting groove is provided at the center of the upper surface of the explosion-proof casing 1, two normally closed contacts 3 are fixedly provided on one side of the bottom end of the mounting groove, two normally open contacts 4 are fixedly provided on the other side of the bottom end of the mounting groove, one side of the two normally closed contacts 3 is provided with a normally closed connecting guide plate 6, one side of the two normally open contacts 4 is provided with a normally open connecting guide plate 7, a stroke reset component 5 is fixedly connected to one side of the bottom end of the mounting groove near the normally open contact 4, one end of the stroke reset component 5 extends to the outside of the explosion-proof casing 1, an adjustment groove 8 is provided at the explosion-proof casing 1 near the stroke reset component 5, both sides of the inner wall of the adjustment groove 8 are connected with closed telescopic connecting plates 9, the telescopic ends of the two closed telescopic connecting plates 9 are connected to the stroke reset component 5, and a sealing top cover 2 is threadedly connected to the upper surface of the explosion-proof casing 1;

[0020] like Figure 1-3 The straight-stroke explosion-proof switch shown in the figure includes a stroke reset assembly 5, which includes a mounting plate 501, one side of which is fixedly connected to a connecting cross bar 502, a propulsion collar 504 is sleeved on the outer side of the connecting cross bar 502, the propulsion collar 504 is connected to the mounting plate 501 through a reset spring 503, and the reset spring 503 is sleeved on the outer side of the connecting cross bar 502, a normally closed connecting touch plate 505 is fixedly connected to one side of the upper surface of the propulsion collar 504 near the normally closed connecting guide plate 6, and the normally closed connecting touch plate 505 is in contact with two normally closed connecting guide plates 6, a normally off connecting touch plate 506 is fixedly connected to the upper surface of the propulsion collar 504 near the normally off connecting guide plate 7, and the normally off connecting touch plate 506 is located between the two normally off connecting guide plates 7, and a driving cross plate 507 is fixedly connected to the propulsion collar 504 near the adjusting slot 8, and both sides of the driving cross plate 507 are fixedly connected to the telescopic end of the closed telescopic connecting plate 9.

[0021] The working principle of the utility model is as follows: when the module on the moving part of the production machinery contacts the driving cross plate 507, the propulsion ring 504 is pushed to move, so that the reset spring 503 contracts, and the normally closed connecting touch plate 505 is separated from the two normally closed connecting guide plates 6. At this time, the circuit between the two normally closed contacts 3 that were originally connected is disconnected, and at this time, the normally open connecting touch plate 506 contacts the normally open connecting guide plate 7, so that the circuit between the two normally open contacts 4 is connected, which is convenient for completing the control of the travel switch, and when the driving cross plate 507 moves, the driving cross plate 507 pulls the sealing The closed telescopic connecting plate 9 moves with the driving cross plate 507, so that the interior of the explosion-proof housing 1 is in a closed state. When the module on the moving part is separated from the driving cross plate 507, the pushing ring 504 is reset under the push of the reset spring 503. At this time, the normally closed connecting touch plate 505 contacts the two normally closed connecting guide plates 6, so that the line between the two normally closed contacts 3 is connected. The device adopts a connecting cross bar 502 vertically sleeved on the outside of the reset spring 503 to reset the driving cross plate 507. The structure is simple and the service life is longer than that of the inclined reset spring 503.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The standard parts used in the utility model can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A linear explosion-proof switch, comprising an explosion-proof housing (1), characterized in that: A mounting slot is provided at the center of the upper surface of the explosion-proof casing (1); two normally closed contacts (3) are fixedly provided on one side of the bottom end of the mounting slot; two normally open contacts (4) are fixedly provided on the other side of the bottom end of the mounting slot; one side of the two normally closed contacts (3) is provided with a normally closed connection guide plate (6); one side of the two normally open contacts (4) is provided with a normally open connection guide plate (7); a stroke reset component (5) is fixedly connected to one side of the bottom end of the mounting slot near the normally open contacts (4); one end of the stroke reset component (5) extends to the outside of the explosion-proof casing (1); an adjustment slot (8) is provided near the stroke reset component (5); both sides of the inner wall of the adjustment slot (8) are connected with closed telescopic connecting plates (9); the telescopic ends of the two closed telescopic connecting plates (9) are connected to the stroke reset component (5); and a sealing top cover (2) is threadedly connected to the upper surface of the explosion-proof casing (1).

2. The linear explosion-proof switch according to claim 1, characterized in that: The stroke reset assembly (5) comprises a mounting vertical plate (501), and a connecting cross bar (502) is fixedly connected to one side of the mounting vertical plate (501).

3. The linear explosion-proof switch according to claim 2, characterized in that: The outer side of the connecting cross bar (502) is sleeved with a propulsion collar (504), and the propulsion collar (504) is connected to the mounting vertical plate (501) via a return spring (503), and the return spring (503) is sleeved on the outer side of the connecting cross bar (502).

4. The linear explosion-proof switch according to claim 3, characterized in that: A normally closed connection touch plate (505) is fixedly connected to one side of the upper surface of the propulsion collar (504) close to the normally closed connection guide plate (6), and the normally closed connection touch plate (505) is in contact with the two normally closed connection guide plates (6).

5. The linear explosion-proof switch according to claim 3, characterized in that: A normally-off connection touch plate (506) is fixedly connected to the upper surface of the propulsion collar (504) near the normally-off connection guide plate (7), and the normally-off connection touch plate (506) is located between the two normally-off connection guide plates (7).

6. The linear explosion-proof switch according to claim 3, characterized in that: The propulsion collar (504) is fixedly connected to a driving transverse plate (507) near the adjusting slot (8), and both sides of the driving transverse plate (507) are fixedly connected to the telescopic ends of the closed telescopic connecting plate (9).

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