阅读说明：本技术 防爆开关及其制造工艺 (Explosion-proof switch and manufacturing process thereof ) 是由 滕品学 滕光明 陈佩静 于 2021-08-17 设计创作，主要内容包括：一种防爆开关,包括断路器,断路器的手柄上设有操作杆,断路器外面套设有防爆壳,防爆壳包括壳体和端盖,端盖扣合在壳体上并通过螺栓固定连接,断路器与防护壳壳体之间灌注环氧树脂胶密封；操作杆的外表面套接有套管,所述套管固定连接有转动叉,所述转动叉可拆卸固定连接至转轴,所述转轴铰接在端盖上,通过转动转轴能够使得转动叉运动,进而使得套管及其内部操作杆拨动,从而进行断路器的开合操作。(An explosion-proof switch comprises a circuit breaker, wherein an operating rod is arranged on a handle of the circuit breaker, an explosion-proof shell is sleeved outside the circuit breaker and comprises a shell and an end cover, the end cover is buckled on the shell and fixedly connected with the shell through a bolt, and epoxy resin glue is filled between the circuit breaker and the shell of a protective shell for sealing; the sleeve pipe has been cup jointed to the surface of action bars, sleeve pipe fixedly connected with rotates the fork, it can dismantle fixed connection to pivot to rotate the fork, the pivot articulates on the end cover, can make through rotating the pivot and rotate the fork motion, and then makes sleeve pipe and inside action bars stir to carry out the operation of opening and shutting of circuit breaker.)

1. An explosion-proof switch comprises a circuit breaker, an operating rod is arranged on a handle of the circuit breaker,

the explosion-proof circuit breaker is characterized in that an explosion-proof shell is sleeved outside the circuit breaker and comprises a shell and an end cover, the end cover is buckled on the shell and fixedly connected with the shell through a bolt, and epoxy resin glue is filled between the circuit breaker and the shell of the protection shell for sealing;

the sleeve pipe has been cup jointed to the surface of action bars, sleeve pipe fixedly connected with rotates the fork, it can dismantle fixed connection to pivot to rotate the fork, the pivot articulates on the end cover, can make through rotating the pivot and rotate the fork motion, and then makes sleeve pipe and inside action bars stir to carry out the operation of opening and shutting of circuit breaker.

2. The explosion proof switch of claim 1 wherein a seal is disposed between said housing and said end cap.

3. The explosion-proof switch of claim 1, wherein said explosion-proof housing is made of stainless steel 316 or aluminum alloy.

4. A process for manufacturing the explosion-proof switch according to claims 1-3, comprising the step of pouring an epoxy glue between the circuit breaker and the housing of the protective cover for sealing, wherein the step of pouring the epoxy glue comprises the steps of:

adding silicon powder and aluminum oxide into epoxy resin, uniformly stirring for 3-5 minutes, adding a curing agent, uniformly stirring for 3-5 minutes, injecting the obtained mixture between a breaker and a shell of a protective cover, vacuumizing for 30-40 minutes, closing the vacuum, and covering an end cover to cure for 2-4 hours at normal temperature for molding.

5. The process of claim 4, wherein the curing agent is triethylene tetramine, the volume percentage of the curing agent in the mixture is 20%, the volume percentage of the silicon powder and the aluminum oxide is 20% and 10%, and the balance is epoxy resin.

6. The process of claim 4, wherein the injected volume of the mixture of epoxy resin is 80-90% of the volume between the circuit breaker and the containment housing.

Technical Field

The invention relates to an explosion-proof switch and a preparation process thereof.

Background

The switch is an element for turning on and off a circuit, and is applied to various electronic devices and household appliances. Most of the existing switches can generate electric sparks when in use, and if the existing switches are used in occasions filled with combustible gas or powder, serious potential safety hazards are brought, so that a plurality of explosion-proof switches appear on the existing market.

The existing explosion-proof switch core is switched on and off by adopting a circuit breaker mode, a corresponding handle is arranged on the circuit breaker, the existing handle is generally and directly placed outside, no corresponding structure is used for protecting the handle, and the explosion-proof effect is poor.

Disclosure of Invention

The invention aims to provide an explosion-proof switch which can solve the problem of potential safety hazard caused by electric sparks generated when an existing electric switch is filled with combustible gas or powder.

The above object of the present invention is achieved by the following scheme:

an explosion-proof switch comprises a circuit breaker, wherein an operating rod is arranged on a handle of the circuit breaker, an explosion-proof shell is sleeved outside the circuit breaker and comprises a shell and an end cover, the end cover is buckled on the shell and fixedly connected with the shell through a bolt, and epoxy resin glue is filled between the circuit breaker and the shell of a protective shell for sealing;

the sleeve pipe has been cup jointed to the surface of action bars, sleeve pipe fixedly connected with rotates the fork, it can dismantle fixed connection to pivot to rotate the fork, the pivot articulates on the end cover, can make through rotating the pivot and rotate the fork motion, and then makes sleeve pipe and inside action bars stir to carry out the operation of opening and shutting of circuit breaker.

Further, a sealing ring is arranged between the shell and the end cover.

Further, the material of the explosion-proof shell is stainless steel 316 or aluminum alloy.

Another object of the present invention is to provide a manufacturing process of the above explosion-proof switch, including injecting epoxy glue between the circuit breaker and the shield case for sealing, the injecting epoxy glue including the following steps:

adding silicon powder and aluminum oxide into epoxy resin, uniformly stirring for 3-5 minutes, adding a curing agent, uniformly stirring for 3-5 minutes, injecting the obtained mixture between a breaker and a shell of a protective cover, vacuumizing for 30-40 minutes, closing the vacuum, and covering an end cover to cure for 2-4 hours at normal temperature for molding.

Further, the curing agent is triethylene tetramine, the volume percentage of the curing agent in the mixture is 20%, the volume percentage of the silicon powder and the aluminum oxide is 20% and 10%, and the balance is epoxy resin.

Further, the injection volume of the mixture of epoxy resin is 80-90% of the volume between the circuit breaker and the protective shell housing.

The invention has the following technical effects:

1. according to the explosion-proof switch, the explosion-proof shell is adopted to cover the circuit breaker, and meanwhile, the explosion-proof shell and the circuit breaker are sealed by epoxy resin, so that the sealing performance of the explosion-proof shell is improved, the circuit breaker is prevented from being filled with water, and meanwhile, the explosion-proof performance is improved.

2. According to the explosion-proof switch, the explosion-proof shell is fixed in a mode that the shell and the end cover are detachable, so that the end cover is convenient to replace and the internal circuit breaker is convenient to maintain. The sleeve pipe has been cup jointed to the surface of action bars, protects the action bars, has improved life.

3. The manufacturing process of the explosion-proof switch adopts a low-temperature casting molding process, and prevents the damage of high-temperature curing to the components of the circuit breaker.

4. According to the manufacturing process of the explosion-proof switch, silicon powder and aluminum oxide are added into the epoxy resin mixture, so that the heat dissipation performance and the electric insulation performance are improved, and the service life of the switch is prolonged.

5. According to the manufacturing process of the explosion-proof switch, the injection volume of the mixture of the epoxy resin is 80-90% of the volume between the circuit breaker and the protective shell, so that the solidified resin is prevented from blocking the rotation of the sleeve.

Drawings

FIG. 1 is a schematic structural diagram of an explosion-proof switch of the present invention;

fig. 2 is a partial schematic view of the explosion-proof switch of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 1-2, an explosion-proof switch comprises a circuit breaker 2, wherein an operating rod is arranged on a handle 3 of the circuit breaker 2, an explosion-proof shell 1 is sleeved outside the circuit breaker, the explosion-proof shell 1 comprises a shell and an end cover, the end cover is buckled on the shell and fixedly connected with the shell through a bolt, and epoxy resin glue is filled between the circuit breaker and the shell of the protection shell for sealing;

the outer surface of the operating rod is sleeved with a sleeve 411, the sleeve is fixedly connected with a rotating fork 211, the rotating fork 211 is detachably and fixedly connected to a rotating shaft 4, the rotating shaft 4 is hinged to an end cover, the rotating fork 211 can move by rotating the rotating shaft 4, and the sleeve 411 and the operating rod inside the sleeve are shifted, so that the opening and closing operation of the circuit breaker is performed;

a sealing ring is arranged between the shell and the end cover;

the explosion-proof shell is made of stainless steel 316;

the manufacturing process of the explosion-proof switch comprises the following steps of pouring epoxy resin glue between the circuit breaker and the protective cover shell for sealing:

adding silicon powder and aluminum oxide into epoxy resin, uniformly stirring for 3 minutes, then adding a curing agent, uniformly stirring for 5 minutes, injecting the obtained mixture between a breaker and a shell of a protective cover, vacuumizing for 30 minutes, closing vacuum, and buckling an upper end cover, curing for 2 hours at normal temperature, and forming.

The curing agent is triethylene tetramine, the volume percentage of the curing agent in the mixture is 20%, the volume percentage of the silicon powder and the aluminum oxide is 20% and 10%, and the balance is epoxy resin.

Wherein the injected volume of the mixture of epoxy resin is 80% of the volume between the circuit breaker and the shield case housing.

Example 2

Referring to fig. 1-2, an explosion-proof switch comprises a circuit breaker 2, wherein an operating rod is arranged on a handle 3 of the circuit breaker 2, an explosion-proof shell 1 is sleeved outside the circuit breaker, the explosion-proof shell 1 comprises a shell and an end cover, the end cover is buckled on the shell and fixedly connected with the shell through a bolt, and epoxy resin glue is filled between the circuit breaker and the shell of the protection shell for sealing;

the outer surface of the operating rod is sleeved with a sleeve 411, the sleeve is fixedly connected with a rotating fork 211, the rotating fork 211 is detachably and fixedly connected to a rotating shaft 4, the rotating shaft 4 is hinged to an end cover, the rotating fork 211 can move by rotating the rotating shaft 4, and the sleeve 411 and the operating rod inside the sleeve are shifted, so that the opening and closing operation of the circuit breaker is performed;

a sealing ring is arranged between the shell and the end cover;

the explosion-proof shell is made of aluminum alloy;

the manufacturing process of the explosion-proof switch comprises the following steps of pouring epoxy resin glue between the circuit breaker and the protective cover shell for sealing:

adding silicon powder and aluminum oxide into epoxy resin, uniformly stirring for 5 minutes, then adding a curing agent, uniformly stirring for 3 minutes, injecting the obtained mixture between a breaker and a shell of a protective cover, vacuumizing for 30 minutes, closing vacuum, and buckling an end cover, curing for 3 hours at normal temperature and forming.

The curing agent is triethylene tetramine, the volume percentage of the curing agent in the mixture is 20%, the volume percentage of the silicon powder and the aluminum oxide is 20% and 10%, and the balance is epoxy resin.

Wherein the injected volume of the mixture of epoxy resin is 90% of the volume between the circuit breaker and the shield case housing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.