CN212725115U

CN212725115U - Power cut-off and transmission device for explosion-proof box

Info

Publication number: CN212725115U
Application number: CN202022194514.9U
Authority: CN
Inventors: 徐沛; 程新宇; 林克峰
Original assignee: Jiangsu Youan Technology Co ltd
Current assignee: Jiangsu Youan Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-03-16
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a power-on and power-off device that flame proof case was used, including installing the sealed switch at flame proof case shells inner wall, transversely arrange the switch pivot on the sealed switch reed in, the rotatory hand (hold) of disc type of being connected with the switch pivot, its characterized in that: the cross-section of one end of the switch rotating shaft, which is close to the sealing switch, is in a cam shape, the other end of the switch rotating shaft is in a circular cross-section, one end of the circular cross-section is sleeved with a copper sleeve, the copper sleeve is in clearance fit with the switch rotating shaft, the fit clearance of the copper sleeve is smaller than 0.2mm, the copper sleeve is installed in a through hole matched with the rotating shaft seat in an interference fit mode, the rotating shaft seat is welded and sealed in an installation hole matched with the rotating shaft seat on the explosion-proof box shell, the switch rotating shaft penetrates through the rotating shaft seat. The device can meet the requirement of explosion suppression, and the simple structure controls the sealing switch in the explosion suppression box from the outside of the explosion suppression box through the rotating handle, and has the advantages of simple structure, stability, reliability, small size and low manufacturing cost.

Description

Power cut-off and transmission device for explosion-proof box

Technical Field

The utility model relates to a flame proof electrical equipment field, concretely relates to power cut and transmission device that flame proof case was used.

Background

In coal mines and chemical plants, due to the nature of the working environment, dangerous situations such as explosion are easily caused, and the places have a large number of circuits and electrical appliances, so when the circuits and the electrical appliances are controlled, an explosion-proof control box needs to be selected to improve the safety when the danger occurs. In such an environment, all electrical appliances are strictly prohibited from being opened with electricity, so that a stable and reliable on-site power cut-off function is required.

The conventional power cut-off and power transmission device for the explosion-proof box is of a button type, and the device is easy to miss touch caused by collision when in use, so that some devices are also of a change-over switch type, the change-over switch is commonly used in common scenes and is not specially designed for the explosion-proof scenes, if the change-over switch is added on the explosion-proof box, a special switch explosion-proof cavity needs to be added, and the multi-cavity explosion-proof box is complex in structure, high in process requirement and high in box size, so that the cost is increased.

Based on practical experience and professional knowledge which are abundant for many years in the design and manufacture of the products, the company researches and designs a power transmission and shutdown device for an explosion-proof box so as to overcome the defects.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a power transmission and cut device that flame proof case was used, its simple structure, power transmission and cut is reliable and stable, small in size, and is with low costs, difficult mistake touch.

The utility model discloses a following technical scheme realizes:

the utility model provides a power transmission and outage device that flame proof case was used, is including installing the sealed switch at flame proof case shell inner wall, transversely arranges the switch pivot on the sealed switch reed in, with the rotatory hand (hold) of switch pivot fixed connection's disc type, the switch pivot is close to sealed switch one end cross-section and is the cam-shapedly, and the other end is circular cross-section, and one of circular cross-section is served and is overlapped there is the copper sheathing, copper sheathing and switch pivot clearance fit, its fit clearance is less than 0.2mm, copper sheathing interference fit installs in the through-hole that the pivot seat matches with it, pivot seat welded seal installs on flame proof case shell in the mounting hole that matches with it, the pivot seat is run through in the switch pivot to at the rotatory hand (hold) of. The matching clearance smaller than 0.2mm can play the explosion-proof effect, so the device can control the sealing switch inside the explosion-proof box from the outside of the explosion-proof box through the rotating handle by a simple structure under the requirement of explosion-proof, and has the advantages of simple structure, stability, reliability, small size and low manufacturing cost.

The utility model discloses further improvement is: the pivot seat is equipped with four first round hole grooves of even circular array distribution with rotatory hand (hold) contact fitting surface, wherein two symmetries first round hole groove overhead has the diameter to be greater than the ball of first round hole groove diameter, and the spring that is equipped with two perpendicular to pivot seat terminal surfaces will respectively two ball tops are in first round hole groove, the spring internal diameter slightly is less than the ball diameter, rotatory hand (hold) is equipped with two second round hole grooves of symmetry with pivot seat contact fitting surface, second round hole groove diameter slightly is greater than the spring external diameter, the spring mounting is in second round hole inslot, the switch bolt is one section step shaft of one end, and the cam cross-section is established in the great one end of diameter, and this section diameter is greater than mounting hole diameter in the pivot seat. The spring is in a compression state, the elastic force of the spring is transmitted to the rotating shaft seat from the ball, then the stepped shaft of the rotating shaft switch penetrates to the rotating shaft switch, then the stepped shaft penetrates to the rotating handle fixedly connected with the rotating shaft switch, and the spring is transmitted back to form a closed force line loop, so that the ball is always supported on the end face of the rotating shaft seat by the stable elastic force of the spring. Through rotatory hand (hold), through spring drive, drive the ball and roll on the pivot seat terminal surface, roll and explain promptly and arrive new on-off state in the first round hole groove, play the effect of location, improve the precision of rotation operation, it is directly perceived convenient to operate.

The utility model discloses further improvement is: the terminal surface that the pivot seat was equipped with four first round hole grooves is equipped with the first boss of two symmetries, first boss is located between two adjacent first round hole grooves, the terminal surface that rotatory hand (hold) was equipped with two second round hole grooves is equipped with two second bosses of symmetry, second boss width slightly is greater than second round hole groove diameter, second round hole groove are opened in the second boss, the second boss height is less than first boss height, the crisscross cooperation installation of first boss and second boss. The first boss and the second boss form a limiting device, so that the rotary handle only rotates in a reciprocating mode within the range of being opened in place and closed in place, and misoperation is prevented.

The utility model discloses further improvement is: the anti-skid lines are carved on the periphery of the rotary handle, so that manual rotary operation is facilitated.

The utility model discloses further improvement is: be carved with the pointer on the outer terminal surface of rotatory hand (hold), rotatory hand (hold is other, is located the explosion-proof box casing outer wall and installs the sign, be carved with the status indicator symbol on the sign, the sign is installed in pointer direction within range. Pointer and sign cooperation are used, can directly perceivedly instruct the power failure state of this device, reduce operating personnel maloperation probability.

The utility model discloses further improvement is: rotatory hand (hold) open towards pivot seat one side has the hole groove that matches with switch pivot cross-section, and the switch pivot is installed into the hole inslot, rotatory hand (hold) and switch pivot are through the spring catch fixed connection of side direction, and fixed connection modes such as contrast welding, threaded bolt, buckle, the installation is dismantled conveniently, simplifies assembly process, low in manufacturing cost.

Compared with the prior art, the utility model have following advantage:

the device can meet the requirement of explosion suppression, the simple structure controls the sealing switch inside the explosion suppression box from the outside of the explosion suppression box through the rotating handle, and the device has the advantages of simple structure, stability, reliability, small size and low manufacturing cost.

And through rotating the rotating handle, the ball is driven to roll on the end face of the rotating shaft seat through spring transmission, and slides into the first circular hole groove to reach a new switching state, so that the positioning effect is achieved, the accuracy of rotating the rotating handle to a position is improved, and the operation is convenient.

And thirdly, the rotary handle and the boss on the rotary shaft seat form a limiting device, so that the rotary handle only rotates in a reciprocating manner within the range of in-place opening and in-place closing, and misoperation is prevented.

And fourthly, anti-slip lines are engraved on the periphery of the rotary handle, so that manual rotary operation is facilitated.

And fifthly, the indicating needle is matched with the indicating board for use, so that the power cut-off and power transmission state of the device can be visually indicated, and the misoperation probability of operators is reduced.

Sixthly, the rotary handle and the switch rotating shaft are fixedly connected through the lateral spring pins, and compared with fixed connection modes such as welding, threaded bolts and buckles, the rotary handle and the switch rotating shaft are convenient to install and disassemble, the assembling process is simplified, and the manufacturing cost is low.

Drawings

Fig. 1 is an isometric exploded view of the present invention;

FIG. 2 is a schematic view of the installation of the present invention in half section;

FIG. 3 is an isometric view of the spindle base;

fig. 4 is an isometric view of a rotary handle.

In the figure: 1. a switch rotating shaft; 2. a flameproof box housing; 3. a copper sleeve; 4. a rotating shaft seat; 5. a ball bearing; 6. a spring; 7. rotating the handle; 8. a sign; 9. a sealing switch; 41. a first boss; 42. a first circular hole groove; 71. a second boss; 72. a second circular hole groove.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The following description refers to the accompanying figures 1-4.

The utility model discloses an install the sealed switch 9 at 2 inner walls of explosion-proof box casing, transversely arrange switch pivot 1 on the sealed switch 9 reed in, the rotatory hand (hold) 7 of disc type of being connected with switch pivot 1, switch pivot 1 is close to sealed switch 9 one end cross-section and is the cam-type, and the other end is circular cross-section, and the cover has copper sheathing 3 on the circular cross-section one end, copper sheathing 3 and the 1 clearance fit of switch pivot, its fit clearance is less than 0.2mm, 3 interference fit of copper sheathing install on pivot seat 4 in the through-hole that matches with it, 4 welding seal of pivot seat install on explosion-proof box casing 2 in the mounting hole that matches with it, switch pivot 1 runs through pivot seat 4 to at circular cross-section one end top fixedly connected with rotatory hand (hold) 7.

The pivot seat 4 is equipped with four first round hole grooves 42 that even circular array distributes with rotatory hand (hold) 7 contact complex terminal surface, wherein two symmetries first round hole groove 42 is overhead to be put the ball 5 that the diameter slightly is greater than first round hole groove 42 diameter, and the spring 6 that is equipped with two perpendicular to pivot seat terminal surfaces will respectively two ball 5 tops are in first round hole groove 42, the spring 6 internal diameter slightly is less than ball 5 diameter, rotatory hand (hold) 7 is equipped with two second round hole grooves 72 of symmetry with pivot seat 4 contact complex terminal surface, second round hole groove 72 diameter slightly is greater than spring 6 external diameter, spring 6 is installed in second round hole groove 72, switch pivot 1 is one section step shaft of one end, and the diameter is established in the great one end of diameter, and this section diameter is greater than pivot seat 4 internal diameters. The terminal surface that pivot seat 4 was equipped with four first round hole grooves 42 is equipped with the first boss 41 of two symmetries, first boss 41 is located between two adjacent first round hole grooves 42, the terminal surface that rotatory hand (hold 7) is equipped with two second round hole grooves 72 is equipped with two second bosss 71 of symmetry, second boss 71 width slightly is greater than second round hole groove 72 diameter, second round hole groove 72 are opened in the second boss 71, second boss 71 height is less than first boss height 41, the crisscross cooperation installation of first boss 41 and second boss 71. As shown in fig. 1, anti-skidding line is carved with around the rotatory hand (hold) 7, be carved with the pointer on the outer terminal surface of rotatory hand (hold) 7, by rotatory hand (hold) 7, be located the 2 outer walls of explosion proof box casing and install sign 8, be carved with the status indicator symbol on the sign 8, sign 8 is installed in pointer instruction scope. The rotary handle 7 is provided with a hole groove matched with the section of the switch rotating shaft 1 on one side facing the rotating shaft seat 4, the switch rotating shaft 1 is installed in the hole groove, and the rotary handle 7 is connected with the switch rotating shaft 1 through a lateral spring pin.

When the device is used, the device is sequentially assembled according to the method and is arranged at a proper position of the explosion-proof box. The rotary handle 7 is rotated according to the indication board 8 and the indication needle on the rotary handle 7, the switch rotating shaft 1 is driven to rotate, and the sealing switch 9 is switched on and off by the rotation of the contact cam surface of the reed of the sealing switch 9 on the switch rotating shaft 1. The rotation of the rotating handle 7 can drive the spring 6 and the ball 5 to rotate, and the ball 5 rolls into the first round hole groove 42 to show that a new switch state is in place, so that the operation is intuitive and clear. When the rotation is blocked, the first boss 41 and the second boss 71 meet to play a limiting role, which indicates that the rotation direction is wrong, and the rotation should be performed in the opposite direction to safely achieve a new switch state.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a power transmission and outage device that flame proof case was used, is including installing sealed switch (9) at flame proof case casing (2) inner wall, transversely arranges switch pivot (1) on sealed switch (9) reed in, and rotatory hand (7) of disk type of switch pivot fixed connection, its characterized in that: switch pivot (1) is close to sealed switch (9) one end cross-section and is the cam form, and the other end is circular cross-section, and circular cross-section one is served and is covered copper sheathing (3), copper sheathing (3) and switch pivot (1) clearance fit, its fit clearance is less than 0.2mm, copper sheathing (3) interference fit install on pivot seat (4) in the through-hole that matches with it, pivot seat (4) welded seal installs on explosion-proof box casing (2) in the mounting hole that matches with it, pivot seat (4) are run through in switch pivot (1) to at circular cross-section one end top fixedly connected with rotatory hand (7).

2. The power transmission and shutdown device for the explosion-proof box according to claim 1, characterized in that: the end face of the rotating shaft seat (4) in contact fit with the rotating handle (7) is provided with four first circular hole grooves (42) which are distributed in an even circular array manner, wherein two symmetrical first circular hole grooves (42) are provided with balls (5) with the diameter slightly larger than that of the first circular hole grooves (42), two springs (6) perpendicular to the end face of the rotating shaft seat are used for respectively ejecting the two balls (5) in the first circular hole grooves (42), the inner diameter of each spring is slightly smaller than that of each ball (5), the end face of the rotating handle (7) in contact fit with the rotating shaft seat (4) is provided with two symmetrical second circular hole grooves (72), the diameter of each second circular hole groove (72) is slightly larger than the outer diameter of each spring (6), each spring (6) is arranged in each second circular hole groove (72), the rotating shaft (1) is a stepped shaft at one end, and the section of the cam is arranged at the end with the larger diameter, the diameter of the section is larger than that of the mounting hole in the rotating shaft seat (4).

3. The power transmission and shutdown device for the explosion-proof box according to claim 2, characterized in that: the terminal surface that pivot seat (4) were equipped with four first round hole grooves (42) is equipped with first boss (41) of two symmetries, first boss (41) are located between two adjacent first round hole grooves (42), the terminal surface that rotatory hand (7) were equipped with two second round hole grooves (72) is equipped with two second boss (71) of symmetry, second boss (71) width slightly is greater than second round hole groove (72) diameter, second round hole groove (72) are opened on second boss (71), second boss (71) height is less than first boss (41) height, and the crisscross cooperation installation of first boss (41) and second boss (71).

4. The power-cut and power-transmission device for the explosion-proof box according to claim 1, characterized in that: anti-skid grains are carved on the periphery of the rotary handle (7).

5. The power-cut and power-transmission device for the explosion-proof box according to claim 1, characterized in that: be carved with the pointer on the outer terminal surface of rotatory hand (7), rotatory hand (7) are other, are located explosion proof box casing (2) outer wall and install sign (8), be carved with state indicator on sign (8), install in the pointer direction indication within range in sign (8).

6. The power-cut and power-transmission device for the explosion-proof box according to claim 1, characterized in that: rotatory hand (7) are opened towards pivot seat (4) one side and are had the hole groove that matches with switch pivot (1) cross-section, and switch pivot (1) is installed into in the hole groove, rotatory hand (7) and switch pivot (1) are through the spring catch fixed connection of side direction.