Marine type explosion-proof switch

Abstract

The boat type explosion-proof switch of the present application comprises a shell, a boat type flap hinged to the shell, a plurality of conductive terminals fixed to the shell, and a conductive assembly for connecting the boat type flap and the conductive terminals, the shell is provided with a switch chamber, the boat type flap is hinged to the opening of the switch chamber, a partition plate for closing the switch chamber is arranged between the switch chamber and the boat type flap, the bottom of the boat type flap is provided with an arc-shaped protrusion and a swing part fixed below the arc-shaped protrusion, the partition plate is recessed with an arc-shaped groove corresponding to the arc-shaped protrusion, a strip-shaped through hole is arranged in the arc-shaped groove, the arc-shaped protrusion is tightly attached to the arc-shaped groove, and the swing part passes through the strip-shaped through hole and can swing back and forth along the strip-shaped through hole. Through the above arrangement, the switch chamber can be isolated from the outside, it can be ensured that the spark generated by the contact of the contact piece of the switch and the terminal can only be in the switch chamber and cannot contact the external flammable gas, the structure is simple and has high explosion-proof performance, and the safety of electrical equipment in special working environment is increased.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of explosion-proof switch, in particular to a boat type explosion-proof switch. BACKGROUND

[0002] It is well known that the moment when the contact of switch and the conductive terminal contact will produce sparks, although the spark does not cause any impact in the conventional life, but if in the flammable and explosive environment, the spark may become a huge hidden trouble. For this purpose, in order to adapt to such environment, the market has developed explosion-proof switch.

[0003] The explosion-proof switch is mainly applied in the more dangerous, harsh and explosive environment, especially in the manufacturing plant, machine equipment and system power supply occasion, refrigeration whole machine and equipment where the flammable gas may exist, the working environment of this kind needs a safe, reliable and easy to break connection. At the same time, the explosion-proof switch is also suitable for external electrical equipment, such as motor, pump, lighting equipment, process control device, etc., or applied in the explosive environment of flammable gas, steam, mist gas or flammable dust. Although there are many brands and types of explosion-proof switches in the market, but in the true sense, there are few high-quality explosion-proof switches with excellent explosion-proof performance and safety and reliability. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a boat type explosion-proof switch, which comprises a shell, a boat type flap hinged to the shell, a plurality of conductive terminals fixed on the shell and a conductive assembly for connecting the boat type flap and the conductive terminals, the shell is provided with a switch chamber, the boat type flap is hinged to the opening of the switch chamber, a partition plate is arranged between the switch chamber and the boat type flap for closing the switch chamber, the bottom of the boat type flap is provided with an arc-shaped protrusion and a swing part fixed below the arc-shaped protrusion, the partition plate is recessed with an arc-shaped groove corresponding to the arc-shaped protrusion, a strip-shaped through hole is arranged in the arc-shaped groove, the arc-shaped protrusion is tightly attached to the arc-shaped groove, and the swing part passes through the strip-shaped through hole and can swing back and forth along the strip-shaped through hole. Through the above arrangement, the switch chamber can be isolated from the outside, and the spark generated by the contact of the contact piece of the switch and the terminal can only be in the switch chamber and cannot contact with the external flammable gas. The structure is simple and has high explosion-proof performance, and the safety of electrical equipment in special working environment is increased.

[0005] The purpose of the present application is achieved by the following technical scheme:

[0006] The ship-shaped explosion-proof switch comprises a shell, a ship-shaped flap hinged to the shell, a plurality of conductive terminals fixed to the shell, and a conductive assembly for connecting the ship-shaped flap and the conductive terminals. The shell is provided with a switch chamber, the ship-shaped flap is hinged to the opening of the switch chamber, a partition plate is arranged between the switch chamber and the ship-shaped flap for closing the switch chamber, the bottom of the ship-shaped flap is provided with an arc-shaped protrusion and a swing part fixed below the arc-shaped protrusion, the partition plate is provided with an arc-shaped groove corresponding to the arc-shaped protrusion, a strip-shaped through hole is arranged in the arc-shaped groove, the arc-shaped protrusion is tightly fitted in the arc-shaped groove, and the swing part passes through the strip-shaped through hole and can swing back and forth along the strip-shaped through hole.

[0007] Further, the ship-shaped flap is hinged to the shell through the hinge shaft arranged on both sides of the ship-shaped flap.

[0008] Further, the swing part is arranged symmetrically along the arc-shaped protrusion, and the swing part and the arc-shaped protrusion are arranged in the middle part of the ship-shaped flap, and the arc-shaped groove is also arranged in the middle part of the partition plate.

[0009] Further, the switch chamber is provided with a through hole corresponding to the conductive terminal, the conductive terminal is nested and fixed in the through hole, and the conductive assembly is arranged in the switch chamber.

[0010] Further, the conductive terminal comprises a middle terminal and at least one side terminal, the conductive assembly comprises a movable contact fixed to the middle terminal and a spring connecting the movable contact and the swing part, the movable contact comprises a spring piece connected with the middle terminal and a connecting part fixed to the spring piece, one end of the spring is sleeved on the swing part, and the other end of the spring is sleeved on the connecting part, and when the ship-shaped flap swings to one side, the movable contact can be driven to contact the side terminal through the spring.

[0011] Further, the conductive terminal is provided with a blocking part for preventing complete insertion into the switch chamber, the blocking part is formed in the middle part of the conductive terminal in the form of a fork, and the blocking part forms a certain angle with the conductive terminal.

[0012] Further, the shell is further provided with a spring for mounting the ship-shaped explosion-proof switch on both sides, one end of the spring is connected with the bottom of the side surface of the shell, and the other end of the spring is a free end.

[0013] Further, the free end of the spring is provided with a stripe for enhancing friction.

[0014] Further, the shell and the ship-shaped flap are made of plastic.

[0015] Further, the partition plate is made of plastic or rubber material.

[0016] Compared with the prior art, the present application has the advantages of:

[0017] The boat-shaped explosion-proof switch of the present application comprises a shell, a boat-shaped flap hinged to the shell, a plurality of conductive terminals fixed to the shell, and a conductive assembly for connecting the boat-shaped flap and the conductive terminals, the shell is provided with a switch chamber, the boat-shaped flap is hinged to the opening of the switch chamber, a partition plate is arranged between the switch chamber and the boat-shaped flap for closing the switch chamber, the bottom of the boat-shaped flap is provided with an arc-shaped protrusion and a swing portion fixed below the arc-shaped protrusion, the partition plate is recessed with an arc-shaped groove corresponding to the arc-shaped protrusion, a strip-shaped through hole is arranged in the arc-shaped groove, the arc-shaped protrusion is tightly fitted in the arc-shaped groove, and the swing portion passes through the strip-shaped through hole and can swing back and forth along the strip-shaped through hole. Through the above arrangement, the switch chamber can be isolated from the outside, it can be ensured that the spark generated by the contact of the contact piece of the switch and the terminal can only be in the switch chamber and cannot contact the external flammable gas, the structure is simple and has high explosion-proof performance, and the safety of electrical equipment in special working environment is increased. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural schematic view of the preferred embodiment of the boat-shaped explosion-proof switch of the present application;

[0019] Fig. 2 is a sectional view of the preferred embodiment of the boat-shaped explosion-proof switch of the present application;

[0020] Fig. 3 is a structural schematic view of the preferred embodiment of the partition plate of the present application.

[0021] In the figure: 100, boat-shaped explosion-proof switch; 1, shell; 11, switch chamber; 2, boat-shaped flap; 21, arc-shaped protrusion; 22, swing portion; 3, conductive terminal; 31, middle terminal; 32, side terminal; 4, partition plate; 41, arc-shaped groove; 42, strip-shaped through hole; 5, conductive assembly; 51, reed; 52, connecting portion; 53, spring. DETAILED DESCRIPTION

[0022] In the following, the present application will be further described in combination with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0023] The boat-shaped explosion-proof switch 100 of the present application is as shown in Figs. 1-3As shown, the switch comprises a housing 1, a boat-shaped flap 2 hinged to the housing 1, a plurality of conductive terminals 3 fixed to the housing 1, and a conductive assembly 5 for connecting the boat-shaped flap 2 and the conductive terminals 3. The housing 1 is provided with a switch chamber 11, the boat-shaped flap 2 is hinged to an opening of the switch chamber 11, and a partition plate 4 is arranged between the switch chamber 11 and the boat-shaped flap 2 to close the switch chamber 11. The bottom of the boat-shaped flap 2 is provided with an arc-shaped protrusion 21 and a swing part 22 fixed below the arc-shaped protrusion 21. The partition plate 4 is recessed with an arc-shaped groove 41 corresponding to the arc-shaped protrusion 21, and the arc-shaped groove 41 is provided with a strip-shaped through hole 42. The arc-shaped protrusion 21 is tightly fitted in the arc-shaped groove 41, and the swing part 22 passes through the strip-shaped through hole 42 and can swing back and forth along the strip-shaped through hole 42. Through the above arrangement, the switch chamber 11 can be isolated from the outside, and the spark generated by the contact of the switch contact and the terminal can only be in the switch chamber 11 and cannot contact the flammable gas outside, so that the structure is simple and has high explosion-proof performance, and the safety of electrical equipment in special working environment is improved.

[0024] The boat-shaped flap 2 in the embodiment is provided with a hinged shaft on both sides, the hinged shaft is arranged in the middle of the boat-shaped flap 2, and the boat-shaped flap 2 is hinged to the housing 1 through the hinged shaft. The boat-shaped flap 2 has three swing states of being biased to the left side, being in the middle and being biased to the right side. Meanwhile, the swing part 22 is arranged along the symmetry of the arc-shaped protrusion 21, the swing part 22 and the arc-shaped protrusion 21 are arranged in the middle of the boat-shaped flap 2, and the arc-shaped groove 41 is also arranged in the middle of the partition plate 4. When the boat-shaped flap 2 swings, the swing part 22 can also swing according to the above three swing states, so that the moving contact can be driven to contact or move away from the conductive terminal 3.

[0025] The switch chamber 11 is provided with a through hole corresponding to the conductive terminal 3 in the embodiment, the conductive terminal 3 is nested and fixed in the through hole, the number of the through holes is corresponding to the number of the conductive terminals 3, the conductive terminal 3 comprises a middle terminal 31 and at least one side terminal 32, and the switch types include single-pole single-throw (one moving contact and one static contact) and single-pole double-throw (one moving contact and two static contacts). The switch corresponding to the single-pole single-throw is provided with only one middle terminal 31 and one side terminal 32, and the switch corresponding to the single-pole double-throw is provided with one middle terminal 31 and two side terminals 32, and the two side terminals 32 are arranged on opposite sides of the middle terminal 31.

[0026] Preferably, the conductive terminal 3 is provided with a blocking part for preventing complete insertion into the switch chamber 11, the blocking part is formed in the middle of the conductive terminal 3 and forms a certain angle with the conductive terminal 3. When installed, the conductive terminal 3 is inserted into the through hole until the blocking part abuts against the housing 1, at this time, it represents that the conductive terminal 3 is installed and fixed.

[0027] The conductive assembly 5 in the embodiment is arranged inside the switch chamber 11, the conductive assembly 5 comprises a movable contact fixed to the middle terminal 31 and a spring 53 connecting the movable contact and the swing part 22, the movable contact comprises a spring piece 51 connected with the middle terminal 31 and a connecting part 52 fixedly arranged on the spring piece 51, one end of the spring 53 is sleeved on the swing part 22, and the other end is sleeved on the connecting part 52, when the boat-shaped rocker 2 swings to one side, at this time, the swing part 22 is inclined at a certain angle, and the spring 53 is twisted and offset to the side, and the connecting part 52 at the other end of the spring 53 is also swung to the side, thereby driving the lower spring piece 51 to contact and press the contact side terminal 32, so that the movable contact and the conductive terminal 3 are connected.

[0028] Both sides of the shell 1 in the embodiment are also respectively provided with a spring for mounting the boat-shaped explosion-proof switch 100, one end of the spring is connected with the bottom of the side surface of the shell 1, and the other end is a free end. When mounting, the switch can be mounted into the switch hole by pressing the springs on both sides. Meanwhile, the free end of the spring is provided with a stripe for enhancing friction. The user is more easily stressed when pressing.

[0029] The shell 1 and the boat-shaped rocker 2 in the embodiment are both made of plastic, and the partition plate 4 is made of plastic or rubber material. The materials of the several components all have good flame-retardant and explosion-proof properties, in the scheme, even if a small amount of flammable gas enters the switch chamber 11, only a small explosion will occur in the switch chamber 11 at the moment when the movable contact and the terminal contact generate sparks, but the explosion will be isolated by the shell 1 and the partition plate 4, and will not act on the external gas, thereby ensuring the safety of the working environment.

[0030] The above embodiment is only a preferred embodiment of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the protection scope of the present application.

Claims

1. A boat-type explosion-proof switch, characterized by: The switch comprises a housing, a boat-shaped flap hinged to the housing, a plurality of conductive terminals fixed to the housing, and a conductive assembly for connecting the boat-shaped flap and the conductive terminals, the housing is provided with a switch chamber, the boat-shaped flap is hinged to an opening of the switch chamber, a partition plate is arranged between the switch chamber and the boat-shaped flap for closing the switch chamber, the bottom of the boat-shaped flap is provided with an arc-shaped protrusion and a swing part fixed below the arc-shaped protrusion, the partition plate is provided with an arc-shaped groove corresponding to the arc-shaped protrusion, a strip-shaped through hole is arranged in the arc-shaped groove, the arc-shaped protrusion is tightly fitted in the arc-shaped groove, and the swing part passes through and swings back and forth along the strip-shaped through hole. The partition plate is made of plastic or rubber material. The conductive assembly is arranged inside the switch chamber.

2. A boat-type explosion-proof switch according to claim 1, characterized in that: The boat-shaped flap is hinged to the housing through hinging shafts arranged on both sides of the boat-shaped flap.

3. The boat-type explosion-proof switch according to claim 1, characterized in that: The swing part is arranged along the symmetry of the arc-shaped protrusion, and the swing part and the arc-shaped protrusion are arranged in the middle part of the boat-shaped flap, and the arc-shaped groove is also arranged in the middle part of the partition plate.

4. The boat-type explosion-proof switch according to claim 1, characterized in that: The switch chamber is provided with a through hole corresponding to the conductive terminal, and the conductive terminal is nested and fixed in the through hole.

5. The boat-type explosion-proof switch according to claim 1, wherein: The conductive terminal comprises a middle terminal and at least one side terminal, the conductive assembly comprises a moving contact fixed to the middle terminal and a spring connecting the moving contact and the swing part, the moving contact comprises a reed connected to the middle terminal and a connecting part fixed to the reed, one end of the spring is sleeved on the swing part, and the other end of the spring is sleeved on the connecting part, when the boat-shaped flap swings to one side, the moving contact can be driven to contact the side terminal through the spring.

6. The boat-type explosion-proof switch according to claim 1, characterized in that: The conductive terminal is provided with a blocking part for preventing complete insertion into the switch chamber, the blocking part is formed in the middle part of the conductive terminal at a certain angle with the conductive terminal.

7. The boat-type explosion-proof switch according to claim 1, characterized in that: The housing is further provided with a spring piece for mounting the boat-shaped explosion-proof switch on both sides, one end of the spring piece is connected to the bottom of the side surface of the housing, and the other end is a free end.

8. A boat-type explosion-proof switch according to claim 7, characterized in that: The free end of the spring piece is provided with a stripe for enhancing friction.

9. The boat-type explosion-proof switch according to claim 1, characterized in that: The housing and the boat-shaped flap are made of plastic.

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