CN218160119U

CN218160119U - Explosion-proof type switching device

Info

Publication number: CN218160119U
Application number: CN202222775693.4U
Authority: CN
Inventors: 孙学新
Original assignee: Tianjin Huikaisen Technology Co ltd
Current assignee: Tianjin Huikaisen Technology Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2022-12-27
Anticipated expiration: 2032-10-21

Abstract

The utility model relates to an explosion-proof type switching device. The window comprises a rectangular shell, wherein side windows are arranged on the side walls of the shell, a rear window is arranged on the rear wall of the shell, and the rear window comprises a straight part and a circular part; the front part of the shell is provided with a mounting plate with a mounting hole, the front part of the middle part of the mounting plate is provided with a bearing sleeve, a rear bearing is arranged in the circular part of the rear window, the front bearing is arranged in the bearing sleeve, a rotating shaft is arranged between the front bearing and the rear bearing, the middle part of the rotating shaft is provided with a shifting block, the front end of the rotating shaft is provided with a handle, the side part of the shell is provided with a side gland, and the rear gland are arranged at the rear part of the shell; install T type support and install switch module on T type support in the bottom of shell, switch module's trigger end stretches into the inside of shell and accepts the trigger operation of shifting block via the connecting hole on T type support and the shell diapire. The utility model has the advantages of reasonable design, sealing characteristic is good, and the operational reliability is high.

Description

Explosion-proof type switching device

Technical Field

The utility model belongs to the technical field of explosion-proof equipment, especially, relate to an explosion-proof type switching device.

Background

Explosion-proof switches are switches that can be used in harsh, relatively dangerous explosive environments, such as the coal mine industry, paint or ink manufacturers, wood processing plants, cement plants, marine operations, sewage treatment, and the like. Explosion-proof switches are also suitable for use in external electrical equipment, such as motors, pumps, lighting equipment, etc., or in explosive environments that result in flammable gases, vapors, mist gases, or flammable dusts. With the rapid development of the industries such as kerosene chemical industry, metal smelting, chemical pharmacy and the like, various types of explosion-proof switches are more and more widely applied to system control.

The explosion-proof characteristic of an explosion-proof switch is determined by the sealing characteristic of the structure and the working principle of the switch, the existing explosion-proof switch device is limited to the structural design, the whole sealing characteristic is difficult to guarantee, and the explosion-proof characteristic is relatively weakened. Therefore, the structure of the explosion-proof type switching device needs to be optimally designed to solve the aforementioned technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the technical problem that exists among the known art and provide an explosion-proof type switching device that structural design is reasonable, sealing characteristic is good, operational reliability is high.

The utility model discloses a technical scheme who takes for solving the technical problem that exists among the well-known technique is: an explosion-proof switch device comprises a rectangular shell, wherein a side window communicated with an inner cavity is arranged on the side wall of the shell, a rear window communicated with the inner cavity is arranged on the rear wall of the shell, and the rear window comprises a straight part and a circular part; the front part of the shell is provided with a mounting plate with a mounting hole, the front part of the mounting plate is provided with a bearing sleeve, the inside of the round part of the rear window is provided with a rear bearing, the inside of the bearing sleeve is provided with a front bearing, a rotating shaft is arranged between the front bearing and the rear bearing, the middle part of the rotating shaft is provided with a shifting block, the front end of the rotating shaft is provided with a handle, the side part of the shell is provided with a side gland, a side sealing gasket is arranged between the side gland and the shell, the rear part of the shell is provided with a rear gland, and a rear sealing gasket is arranged between the rear gland and the shell; install T type support and install switch module on T type support in the bottom of shell, switch module's trigger end stretches into the inside of shell and accepts the trigger operation of shifting block via the connecting hole on T type support and the shell diapire.

Preferably: the rotating shaft is also provided with a packing sleeve, the packing sleeve is composed of an inner sleeve, an outer sleeve and an annular sealing plate positioned between the inner ends of the inner sleeve and the outer sleeve, the inner diameter of the inner sleeve is equal to the outer diameter of the rotating shaft, the outer diameter of the outer sleeve is equal to the inner diameter of a shaft hole in the front wall of the shell, the outer sleeve is in tight fit with the shaft hole, and a sealing packing is arranged in a space between the outer side of the packing sleeve and the inner side of the front bearing.

Preferably: the switch assembly comprises a first switch assembly and a second switch assembly, the first switch assembly and the second switch assembly are respectively installed on the left side and the right side of a support vertical plate of the T-shaped support, and shells of the two switch assemblies are fixedly bonded with the T-shaped support in a sealing mode.

Preferably: the support diaphragm of T type support and the diapire welded fastening of shell, perhaps the support diaphragm of T type support adopts the fix with screw and sets up the bottom packing between support diaphragm and shell with the diapire of shell.

Preferably: the shell, the mounting plate and the bearing sleeve are of an integrally formed structure, a plurality of threaded connecting holes are formed in the side portion and the rear portion of the shell respectively, and the side pressing cover and the rear pressing cover are fixedly connected with the shell through a plurality of screws respectively.

Preferably: the rear bearing is arranged on the circular part of the rear window by adopting a rear snap ring, and the front bearing is arranged in the bearing sleeve by adopting a front snap ring.

Preferably: the shifting block is in a cuboid shape, a hollow hole is formed in the middle of the shifting block, a shaft hole which is transversely communicated is formed in the rear of the shifting block, and the middle of the rotating shaft is located in the shaft hole of the shifting block and fixedly connected through a screw.

The utility model discloses an advantage is with positive effect:

the utility model provides an explosion-proof type switching device that structural design is reasonable compares with current explosion-proof switch, the utility model provides an explosion-proof switching device is through setting up the shell and set up by the pivot drive pivoted shifting block in the inside of shell, for the shifting block provides upset pivoted space, carries out the switch to switch assembly through the shifting block and triggers, and this switching device is off-state when the shifting block is put flat, this switching device is the on-state when the shifting block is indulged, and shifting block self possesses great stroke and is difficult for taking place the card problem at the in-process of executive switch action, and the operational reliability is high.

The side gland and the side sealing gasket are arranged on the side window, and the rear gland and the rear sealing gasket are arranged on the rear window, so that the shell is sealed, the integral sealing property of the explosion-proof switch device is ensured, and the explosion-proof property of the switch device is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention, from the rear view;

FIG. 2 is a schematic view of the present invention, from the front view;

FIG. 3 is a schematic view of the internal structure of the present invention;

fig. 4 is a schematic structural view of the handle, the rotating shaft and the shifting block in fig. 3.

In the figure:

1. a handle; 2. a bearing housing; 3. mounting a plate; 4. a side gland; 5. a first switch assembly; 6. a T-shaped bracket; 7. a side gasket; 8. a rear gasket; 9. a housing; 10. a second switch assembly; 11. a rear gland; 12. a rotating shaft; 13. a rear bearing; 14. a rear snap ring; 15. a rear window; 16. shifting blocks; 17. a packing sleeve; 18. a front bearing; 19. a front snap ring.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are described in detail.

Referring to fig. 1, 2 and 3, the explosion-proof type switching device of the present invention includes a rectangular housing 9, a side window penetrating through the inner cavity is provided on a side wall of the housing 9, and a rear window 15 penetrating through the inner cavity is provided on a rear wall of the housing 9, as shown in the drawing, the side window is a rectangular window, and the rear window 15 includes a straight portion and a circular portion, and the straight portion penetrates through the circular portion.

The front part of the shell 9 is provided with a mounting plate 3 with a mounting hole, when the explosion-proof switch device is installed and used, the mounting plate 3 is installed and fixed on a switch base by adopting a bolt, and the bolt is positioned in the mounting hole on the mounting plate 3.

A bearing housing 2 is arranged in front of the middle part of the mounting plate 3, a front bearing 18 is arranged in the bearing housing 2, a rear bearing 13 is arranged in the circular part of the rear window 15, and a rotating shaft 12 is arranged between the front bearing 18 and the rear bearing 13. In the embodiment, as shown in the figure, both the front bearing 18 and the rear bearing 13 are selected as ball bearings, the rear bearing 13 is mounted on the circular part of the rear window 15 by using the rear snap ring 14, the front bearing 18 is mounted in the bearing housing 2 by using the front snap ring 19, the rotating shaft 12 passes through the inner rings of both the front bearing 18 and the rear bearing 13, the rotating shaft 12 is fixedly connected with the inner rings of the two bearings, and the rotating shaft 12 can rotate.

In this embodiment, the housing 9, the mounting plate 3, and the bearing housing 2 are integrally formed, specifically, a metal block blank is placed on an operation platform of a machining center, an external contour is milled and formed by a milling process, then an inner cavity and a side window are milled and formed from a side portion of the housing 9 to the inside, a rear window 15 is milled and formed on a rear wall of the housing 9, then a shaft hole penetrating through the bearing housing 2, the mounting plate 3, and a front side wall of the housing 9 is formed by a drilling process, and then a snap ring groove is machined in a circular portion of the bearing housing 2 and the rear window 15.

A shifting block 16 is arranged in the middle of the rotating shaft 12, a handle 1 is arranged at the front end of the rotating shaft 12, wherein the shifting block 16 is positioned in the inner cavity of the shell 9 and is used for generating triggering operation, and the handle 1 is used for driving the rotating shaft 1 to rotate. As shown in the drawings, in the present embodiment, the shifting block 16 is a rectangular parallelepiped, a hollow hole (for reducing the overall weight of the switch device and improving the light weight) is formed in the middle of the shifting block 16, a shaft hole penetrating in the transverse direction is formed in the rear of the shifting block 16, and the middle of the rotating shaft 12 is located in the shaft hole of the shifting block 16 and is fixedly connected by a screw. The end of the handle 1 is provided with a shaft hole, and the end of the rotating shaft 12 is positioned in the shaft hole and fixedly connected with the shaft hole by a screw.

A side gland 4 is installed at a side portion of the housing 9 and a side packing 7 is provided between the side gland 4 and the housing 9, a rear gland 11 is installed at a rear portion of the housing 9 and a rear packing 8 is provided between the rear gland 11 and the housing 9, both the side packing 7 and the rear packing 8 serve to improve sealing characteristics of a side window and a rear window 15 of the housing 9. Further, in the present embodiment, a plurality of screw coupling holes are provided at the side and rear portions of the housing 9, respectively, and both the side pressure cover 4 and the rear pressure cover 11 are fixedly coupled to the housing 9 using a plurality of screws, respectively.

Referring to fig. 4, a packing sleeve 17 is further mounted on the rotating shaft 12, and the packing sleeve 17 is located between the front bearing 18 and the remaining blocks 16. As shown in the figure, the stuffing sleeve 17 is composed of an inner sleeve, an outer sleeve and an annular closing plate between the inner ends of the inner sleeve and the outer sleeve, the inner diameter of the inner sleeve is equal to the outer diameter of the rotating shaft 12, the outer diameter of the outer sleeve is equal to the inner diameter of the shaft hole on the front wall of the shell 9, the outer sleeve is tightly matched with the shaft hole, and sealing stuffing is arranged in a space between the outer side of the stuffing sleeve 17 and the inner side of the front bearing 18 and is used for improving the sealing property between the front part of the rotating shaft 12 and the shaft hole in the bearing sleeve 2, the mounting plate 3 and the shell 9.

A T-shaped support 6 is installed at the bottom of the shell 9, a switch assembly is installed on the T-shaped support 6, and a trigger end of the switch assembly extends into the shell 9 through connecting holes in the T-shaped support 6 and the bottom wall of the shell 9 and receives trigger operation of the shifting block 16. As shown in the figures, the T-shaped support 6 is composed of a support cross plate and a support vertical plate, and the top edge of the support vertical plate is fixedly connected with the middle part of the bottom surface of the support cross plate. Be equipped with the connecting hole on the support diaphragm of T type support 6, be equipped with the connecting hole in the relevant position on the diapire of shell 9, two connecting holes are aimed at from top to bottom, therefore switch module's trigger end can upwards penetrate the inner chamber of shell 9 and operate by dialling board 16.

In this embodiment, the lateral plate of the T-shaped bracket 6 and the housing 9 can be connected in the following two ways: firstly, the support diaphragm of T type support 6 and the sealed welded fastening of diapire of shell 9, secondly the support diaphragm of T type support 6 and the diapire of shell 9 adopt the fix with screw and set up the sealed pad of bottom between support diaphragm and shell 9, and in the latter kind of fixed mode, set up a plurality of threaded connection holes in the bottom of shell 9, the support diaphragm of T type support 6 adopts a plurality of screws to the bottom fixed mounting of shell 9.

In this embodiment, the switch assembly includes a first switch assembly 5 and a second switch assembly 10, which are respectively installed on the left and right sides of a support vertical plate of the T-shaped support 6, and the casings of the two switch assemblies are sealed, adhered and fixed to the T-shaped support 6. First switch module 5 is the same with second switch module 10's structure, for current subassembly, all include the casing of cuboid shape, install switch mechanism in the casing, install in the top intermediate position of casing and be connected with inside switch mechanism, have reset spring's trigger end, when trigger end is pressed downwards, inside switch mechanism switches on, when trigger end is released, trigger end moves on going upward under reset spring's elastic force effect, inside switch mechanism disconnection.

The assembling method comprises the following steps:

a packing sleeve 17 is arranged in the bearing sleeve 2, and the packing sleeve 17 moves inwards until being clamped and fixed in a shaft hole on the front wall of the shell 9; mounting and fixing a shifting block 16 in the middle of a rotating shaft 12, penetrating the rotating shaft 12 from a rear window 15 through a shell 7 and a bearing sleeve 2, enabling the main body part of the shifting block 16 to enter an inner cavity of the shell 9 through the straight part of the rear window 15, placing sealing filler outside a filler sleeve 17, then placing a front bearing 18 into the bearing sleeve 2, fixing the front bearing 18 into the bearing sleeve 2 by using a front snap ring 19, placing a rear bearing 13 into the round part of the rear window 15, and fixing the rear bearing 13 into the rear window 15 by using a rear snap ring 14; a handle 1 is arranged at the front end of the rotating shaft 12;

a side gland 4 and a side sealing gasket 7 are arranged at the side part of the shell 9, a rear gland 11 and a rear sealing gasket 8 are arranged at the rear part of the shell 9, and two groups of glands and sealing gaskets are fixedly connected with the shell 9 by screws; installing and fixing a T-shaped support 6 at the bottom of a shell 9, and then installing a first switch component 5 and a second switch component 10 at two sides of the T-shaped support 6 in an adhesion mode, specifically, arranging sealant between shells of the two switch components and the T-shaped support 6, wherein trigger ends of the first switch component 5 and the second switch component 10 extend into an inner cavity of the shell 9 from connecting holes in the bottom walls of the T-shaped support 6 and the shell 9;

when the explosion-proof switch device is operated, the handle 1 is manually operated, the handle 1 drives the inner shifting block 16 to rotate in a tilting mode through the rotating shaft 12, when the shifting block 16 is in a flat state, the two switch assemblies below are not triggered, the switch device is in an off state, when the shifting block 16 tilts to a vertical state, the triggering ends of the two switch assemblies below are downwards pressed to trigger, and the switch device is in an on state.

Claims

1. An explosion-proof type switchgear characterized in that: the device comprises a rectangular shell (9), wherein a side window communicated with an inner cavity is arranged on the side wall of the shell (9), a rear window (15) communicated with the inner cavity is arranged on the rear wall of the shell (9), and the rear window (15) comprises a straight part and a circular part; the front part of the shell (9) is provided with a mounting plate (3) with a mounting hole, the middle front part of the mounting plate (3) is provided with a bearing sleeve (2), the circular part of a rear window (15) is internally provided with a rear bearing (13), the bearing sleeve (2) is internally provided with a front bearing (18), a rotating shaft (12) is arranged between the front bearing (18) and the rear bearing (13), the middle part of the rotating shaft (12) is provided with a shifting block (16), the front end of the rotating shaft (12) is provided with a handle (1), the side part of the shell (9) is provided with a side gland (4), a side sealing gasket (7) is arranged between the side gland (4) and the shell (9), the rear part of the shell (9) is provided with a rear gland (11), and a rear sealing gasket (8) is arranged between the rear gland (11) and the shell (9); a T-shaped support (6) is arranged at the bottom of the shell (9), a switch assembly is arranged on the T-shaped support (6), and a trigger end of the switch assembly extends into the shell (9) through connecting holes in the T-shaped support (6) and the bottom wall of the shell (9) and receives the trigger operation of the shifting block (16).

2. Explosion-proof switching device according to claim 1, characterized in that: the rotating shaft (12) is also provided with a packing sleeve (17), the packing sleeve (17) is composed of an inner sleeve, an outer sleeve and an annular sealing plate positioned between the inner ends of the inner sleeve and the outer sleeve, the inner diameter of the inner sleeve is equal to the outer diameter of the rotating shaft (12), the outer diameter of the outer sleeve is equal to the inner diameter of a shaft hole in the front wall of the shell (9), the outer sleeve is tightly matched with the shaft hole, and sealing packing is arranged in a space between the outer side of the packing sleeve (17) and the inner side of the front bearing (18).

3. An explosion-proof type switching device according to claim 2, wherein: the switch assembly comprises a first switch assembly (5) and a second switch assembly (10), wherein the first switch assembly and the second switch assembly are respectively installed on the left side and the right side of a support vertical plate of the T-shaped support (6), and shells of the two switch assemblies are fixedly sealed and bonded with the T-shaped support (6).

4. Explosion-proof switching device according to claim 3, characterized in that: a support transverse plate of the T-shaped support (6) is welded and fixed with the bottom wall of the shell (9), or the support transverse plate of the T-shaped support (6) is fixed with the bottom wall of the shell (9) through screws, and a bottom sealing gasket is arranged between the support transverse plate and the shell (9).

5. Explosion-proof switchgear device according to claim 4, characterized in that: the outer shell (9), the mounting plate (3) and the bearing sleeve (2) are of an integrated structure, a plurality of threaded connecting holes are formed in the side portion and the rear portion of the outer shell (9), and the side pressure covers (4) and the rear pressure cover (11) are fixedly connected with the outer shell (9) through a plurality of screws.

6. Explosion-proof switching device according to claim 5, characterized in that: the rear bearing (13) is mounted on the circular part of the rear window (15) through a rear clamping ring (14), and the front bearing (18) is mounted in the bearing sleeve (2) through a front clamping ring (19).

7. Explosion-proof switchgear device according to claim 6, characterized in that: the shifting block (16) is in a cuboid shape, a hollow hole is formed in the middle of the shifting block, a transverse through shaft hole is formed in the rear portion of the shifting block (16), and the middle of the rotating shaft (12) is located in the shaft hole of the shifting block (16) and fixedly connected through screws.