阅读说明：本技术 一种安全系数高的分区储液罐 (Subregion liquid storage pot that factor of safety is high ) 是由 陈建龙 陈诺 李晓亮 杨家宁 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种安全系数高的分区储液罐,包括罐体,所述罐体的一侧顶端设置有进液口,所述罐体的另一侧底端设置有出液口,所述罐体中沿所述进液口到所述出液口依次设置有多个第一分区机构和一个第二分区机构,靠近所述进液口的所述第一分区机构与所述进液口相连通,两个相邻的第一分区机构之间相连通,靠近所述出液口的所述第一分区机构与所述第二分区机构相连通,所述第二分区机构与所述出液口相连通。本发明采用上述结构的一种安全系数高的分区储液罐,第一分区机构和第二分区机构中的重力球体具有开关的功能,使罐体可以分区控制,便于维修。(The invention discloses a partitioned liquid storage tank with high safety coefficient, which comprises a tank body, wherein a liquid inlet is formed in the top end of one side of the tank body, a liquid outlet is formed in the bottom end of the other side of the tank body, a plurality of first partition mechanisms and a second partition mechanism are sequentially arranged in the tank body from the liquid inlet to the liquid outlet, the first partition mechanism close to the liquid inlet is communicated with the liquid inlet, two adjacent first partition mechanisms are communicated with each other, the first partition mechanism close to the liquid outlet is communicated with the second partition mechanism, and the second partition mechanism is communicated with the liquid outlet. According to the partitioned liquid storage tank with the high safety coefficient, the gravity balls in the first partition mechanism and the second partition mechanism have the switch function, so that the tank body can be controlled in a partitioned mode, and the partitioned liquid storage tank is convenient to maintain.)

1. The utility model provides a subregion liquid storage pot that factor of safety is high which characterized in that: including a jar body, one side top of jar body is provided with the inlet, the opposite side bottom of jar body is provided with the liquid outlet, follow in the jar body the inlet arrives the liquid outlet has set gradually a plurality of first subregion mechanisms and a second subregion mechanism, is close to the inlet first subregion mechanism with the inlet is linked together, is linked together between two adjacent first subregion mechanisms, is close to the liquid outlet first subregion mechanism with second subregion mechanism is linked together, second subregion mechanism with the liquid outlet is linked together.

2. The partitioned liquid storage tank with high safety factor as claimed in claim 1, wherein: the first partition mechanism comprises a partition unit and a safety partition plate arranged on one side, far away from the liquid inlet, of the partition unit, the partition unit and the second partition mechanism are identical in structure, the partition unit comprises a positioning cylinder, a concave base material, a gravity ball and a lifting unit, a material passing hole is formed in the middle of the concave base material, the bottom end of the concave base material is connected with the bottom end of the tank body, a material passing channel communicated with the material passing hole is reserved in the bottom end of the tank body, the top end of the concave base material is connected with the bottom end of the positioning cylinder, the top end of the positioning cylinder penetrates out of the top end of the tank body, the gravity ball is arranged in the positioning cylinder, the bottom end of the gravity ball is matched with the arc-shaped surface of the top end of the concave base material, the top end of the gravity ball is connected with the bottom end of the lifting unit, and the top end of the lifting unit penetrates out of the top end of the positioning cylinder, the material passing channel of the second partition mechanism is communicated with the liquid outlet.

3. The partitioned liquid storage tank with high safety factor as claimed in claim 2, wherein: the lifting unit comprises a switch handle, a closed ring, a cover plate and a blocking bolt, wherein the cover plate is arranged at the top end of the positioning cylinder and is in sealing connection with the positioning cylinder, the bottom end of the switch handle is fixedly connected with the top end of the gravity ball body, the top end of the switch handle penetrates out of the cover plate and is provided with the blocking bolt, the closed ring is arranged on the upper surface of the cover plate, and the closed ring is sleeved on the switch handle.

4. The partitioned liquid storage tank with high safety factor as claimed in claim 2, wherein: the lifting unit comprises a switch cover, a switch chain, a handle and a claw fixing bolt, one side of the switch cover is connected with the top end of the positioning cylinder in a rotating mode, the other side of the switch cover is fixed on the positioning cylinder, the claw fixing bolt is matched with the positioning cylinder, one end of the switch chain is fixedly connected with the top end of the gravity ball body, the other end of the switch chain is fixedly connected with the lower surface of the switch cover, and the upper surface of the switch cover is provided with the handle.

5. The partitioned liquid storage tank with high safety factor as claimed in claim 2, wherein: the positioning cylinder is positioned on the outer wall of the part in the tank body and is provided with a plurality of liquid inlet holes, the safety partition plate is arranged on one side, away from the liquid inlet holes, of the positioning cylinder, the outer edge of the safety partition plate is fixedly connected with the inner wall of the tank body, and a gap communicated with the material passing channel is reserved at the bottom end of the safety partition plate.

6. The partitioned liquid storage tank with high safety factor as claimed in claim 2, wherein: and the outer wall of the gravity ball and the top end of the concave substrate are both provided with sealing layers.

7. The partitioned liquid storage tank with high safety factor as claimed in claim 1, wherein: the liquid outlet is communicated with an output pipeline, and a sealing gasket, an inner side switch and an outer side switch are sequentially arranged on the output pipeline along the liquid flowing direction.

8. The partitioned liquid storage tank with high safety factor as claimed in claim 1, wherein: the top of the tank body is provided with a communicating pipe, the bottom of the communicating pipe is communicated with the top of the tank body, the top of the communicating pipe is provided with a manhole cover, the lower surface of the manhole cover is provided with a first sealing ring, and the communicating pipe is sleeved with the first sealing ring.

9. The partitioned liquid storage tank with high safety factor as claimed in claim 8, wherein: and the upper surface of the manhole cover is provided with a pressure ball body.

Technical Field

The invention relates to the technical field of chemical product storage and transportation equipment, in particular to a partitioned liquid storage tank with high safety coefficient.

Background

In the production process of chemical enterprises, strong acid, strong base, toxic, harmful and non-pressure stored liquid chemicals need to be used or produced, which is related to the storage and transportation of the chemicals. Generally, storage tanks are adopted for storage and transportation, two simple switches are connected in series at the outlet end of liquid, and some switches or even only one switch is arranged, so that the safety factor is low, and the intrinsic safety cannot be achieved.

Two switch valves connected in series, the switch at the inner side is normally open as a standby switch all the year round, and the switch at the outer side is opened when in use and closed when in outage. The two switches are affected by corrosion, impurities, quality, use frequency, vibration and use environment, so that the problems of failure of the inner switch, untight sealing of the outer switch, damage of gaskets between pipeline flanges and the like are easily caused, and chemical agent leakage occurs; the method has great negative effect on the continuous and stable production, generates economic loss and threatens the physical and psychological health of maintainers.

Disclosure of Invention

The invention aims to provide a partitioned liquid storage tank with high safety coefficient, and the partitioned liquid storage tank is used for solving the problem that the liquid outlet of the storage tank is only provided with two external switches, and the switch is damaged to cause difficulty in maintenance.

In order to achieve the purpose, the invention provides a partitioned liquid storage tank with high safety coefficient, which comprises a tank body, wherein a liquid inlet is formed in the top end of one side of the tank body, a liquid outlet is formed in the bottom end of the other side of the tank body, a plurality of first partition mechanisms and a second partition mechanism are sequentially arranged in the tank body from the liquid inlet to the liquid outlet along the liquid inlet, the first partition mechanism close to the liquid inlet is communicated with the liquid inlet, two adjacent first partition mechanisms are communicated with each other, the first partition mechanism close to the liquid outlet is communicated with the second partition mechanism, and the second partition mechanism is communicated with the liquid outlet.

Preferably, the first partition mechanism comprises a partition unit and a safety partition plate arranged on one side of the partition unit far away from the liquid inlet, the partition unit and the second partition mechanism have the same structure, the partition unit comprises a positioning cylinder, a concave base material, a gravity ball and a lifting unit, a material passing hole is formed in the middle of the concave base material, the bottom end of the concave base material is connected with the bottom end of the tank body, a material passing channel communicated with the material passing hole is reserved at the bottom end of the tank body, the top end of the concave base material is connected with the bottom end of the positioning cylinder, the top end of the positioning cylinder penetrates out of the top end of the tank body, the gravity ball is arranged in the positioning cylinder, the bottom end of the gravity ball is matched with the arc-shaped surface at the top end of the concave base material, the top end of the gravity ball is connected with the bottom end of the lifting unit, and the top end of the lifting unit penetrates out of the top end of the positioning cylinder, the material passing channel of the second partition mechanism is communicated with the liquid outlet.

Preferably, the lifting unit comprises a switch handle, a closed ring, a cover plate and a stop bolt, the cover plate is arranged at the top end of the positioning cylinder and is in sealing connection with the positioning cylinder, the bottom end of the switch handle is fixedly connected with the top end of the gravity ball body, the top end of the switch handle penetrates out of the cover plate and is provided with the stop bolt, the closed ring is arranged on the upper surface of the cover plate, and the closed ring is sleeved on the switch handle.

Preferably, the lifting unit includes switch cover, switch chain, handle and goat's horn fixing bolt, one side of switch cover with the top of a location section of thick bamboo is rotated and is connected, the opposite side of switch cover with be fixed in on the location section of thick bamboo goat's horn fixing bolt phase-match, the one end of switch chain with the spheroidal top fixed connection of gravity, the other end of switch chain with the lower fixed surface of switch cover is connected, the upper surface of switch cover is provided with the handle.

Preferably, the location section of thick bamboo is located partial outer wall in the jar body is provided with a plurality of feed liquor holes, safe subregion board set up in the location section of thick bamboo is kept away from one side of feed liquor, the outward flange of safe subregion board with the inner wall fixed connection of the jar body, the bottom of safe subregion board leave with the space that the material passageway is linked together leads to.

Preferably, the outer wall of the gravity ball and the top end of the concave substrate are both provided with a sealing layer.

Preferably, the liquid outlet is communicated with an output pipeline, and a sealing gasket, an inner side switch and an outer side switch are sequentially arranged on the output pipeline along the liquid flowing direction.

Preferably, the top of the tank body is provided with a communicating pipe, the bottom end of the communicating pipe is communicated with the top end of the tank body, the top end of the communicating pipe is provided with a manhole cover, the lower surface of the manhole cover is provided with a first sealing ring, and the communicating pipe is sleeved with the first sealing ring.

Preferably, the upper surface of the manhole cover is provided with a pressure ball.

Therefore, the partitioned liquid storage tank with the high safety coefficient, which adopts the structure, has the following beneficial effects:

(1) the gravity ball switch of the second partition mechanism enhances the safety performance of the output end, and even if the external inner side switch and the external side switch are completely out of work, liquid leakage cannot happen, and it is safer and simpler for a maintenance worker to replace the external switch of the tank body.

(2) The gravity ball switch of the first partition mechanism and the safety partition plate form a controllable closed area together, and for improving the safety factor, liquid close to the liquid outlet can be completely recycled to the tank body close to the liquid inlet through an external pump or is discharged through a container before being overhauled, so that the waste of chemical substances is reduced, and the pollution to the environment is effectively avoided.

(3) For chemical substances with the storage non-continuous output requirement, when materials are loaded and unloaded, the area close to the liquid outlet can be emptied, the amount of the chemical substances used is just stored in the area, the safety of the stored materials is greatly improved, and the possibility that the gravity ball switches, the inner side switch and the outer side switch are damaged simultaneously is almost zero.

(4) According to the size of the tank body and the danger coefficient of chemical substances, a plurality of gravity ball switches can be additionally arranged in the tank body to divide the tank body into spaces with the same or different sizes, and the chemical substances can be safely sealed in a small area when special conditions are met.

(5) The plurality of gravity switches are additionally arranged in the tank body, so that liquid can be limited in the separation area, the unused tank area is in a full-load state, the liquid in the unused tank area is effectively reduced, and the impact of back-and-forth surge formed by the liquid inside the tank body on the tank body after the liquid is subjected to traction force or braking force of a locomotive is improved, so that the stability of a transport vehicle is improved, and meanwhile, the generation amount of static electricity can be greatly reduced.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is prior art;

FIG. 2 is a schematic diagram of an open state of a partitioned liquid storage tank embodiment 1 with a high safety factor;

FIG. 3 is a schematic diagram of a shut-down condition of embodiment 1 of a zoned-reservoir of the present invention with a high safety factor;

FIG. 4 is a side cross-sectional view of a high factor of safety zoned-reservoir embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a positioning cartridge for an embodiment of a high safety partitioned fluid reservoir of the present invention;

FIG. 6 is a schematic diagram of the open state of a partitioned liquid storage tank embodiment 2 with a high safety factor

FIG. 7 is a schematic diagram of a shut-down condition for a high safety partitioned receiver embodiment 2 of the present invention.

In the figure: 1. a tank body; 2. a liquid inlet; 3. a liquid outlet; 4. a communicating pipe; 5. a manhole cover; 6. a first seal ring; 7. a pressure sphere; 8. an output pipeline; 9. a sealing gasket; 10. an inside switch; 11. an outside switch; 12. a concave substrate; 13. a feed through hole; 14. a material passing channel; 15. a security partition panel; 16. a positioning cylinder; 17. a gravity sphere; 18. a sealing layer; 19. a switch handle; 20. a stop bolt; 21. a cover plate; 22. a second seal ring; 23. a closed ring; 24. a switch chain; 25. a cleat fixing bolt; 26. a switch cover; 27. a handle; 28. a third seal ring; 29. and a liquid inlet hole.

Detailed Description

The technical solution of the present invention is further illustrated by the accompanying drawings and examples.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example 1

The utility model provides a subregion liquid storage pot that factor of safety is high includes a jar body 1, one side top of jar body 1 is provided with inlet 2, the opposite side bottom of jar body 1 is provided with liquid outlet 3, set gradually a first subregion mechanism and a second subregion mechanism along inlet 2 to liquid outlet 3 in jar body 1, first subregion mechanism and second subregion mechanism divide into jar body 1 and are close to the A district of inlet 2 and the B district between first subregion mechanism and the second subregion mechanism, one side of first subregion mechanism is linked together through A district and inlet 2, the opposite side of first subregion mechanism is linked together through one side of B district and second subregion mechanism, the opposite side and the liquid outlet 3 of second subregion mechanism are linked together, liquid flows through inlet 2 in proper order, A district, first subregion mechanism, B district, second subregion mechanism and liquid outlet 3. The liquid outlet 3 is communicated with an output pipeline 8, and a sealing gasket 9, an inner side switch 10 and an outer side switch 11 are sequentially arranged on the output pipeline 8 along the liquid flowing direction.

First subregion mechanism includes the subregion unit and sets up in the safe subregion board 15 that the subregion unit kept away from 2 one sides of inlet, the subregion unit is the same with the structure of second subregion mechanism, the subregion unit is including a location section of thick bamboo 16, concave type substrate 12, gravity spheroid 17 and hoisting unit, the part outer wall that a location section of thick bamboo 16 is located jar body 1 is provided with a plurality of feed liquor holes 29, safe subregion board 15 sets up in the one side that a location section of thick bamboo 16 kept away from inlet 2, the outward flange of safe subregion board 15 and jar internal wall fixed connection of body 1, the space that is linked together with material passageway 14 is left to the bottom of safe subregion board 15, a location section of thick bamboo 16 and safe subregion board 15 will make jar body 1 divide into relative confined A district and the B district that can control. The middle part of concave substrate 12 has seted up material through hole 13, the bottom of concave substrate 12 is connected with the bottom of jar body 1 and leaves the material through passage 14 that is linked together with material through hole 13, the top of concave substrate 12 is connected with the bottom of a positioning section of thick bamboo 16, the top of a positioning section of thick bamboo 16 is worn out the top of jar body 1, gravity spheroid 17 sets up in a positioning section of thick bamboo 16, a positioning section of thick bamboo 16 mainly is used for restricting the range of the front and back left and right sides activity of gravity spheroid 17, make it accurately fall into concave substrate 12, the bottom of gravity spheroid 17 and the arcwall at concave substrate 12 top match, the outer wall of gravity spheroid and the top of concave substrate 12 all are provided with sealing layer 18, sealing layer 18 need according to the liquid nature of splendid attire, select corresponding sealing material, ensure that it does not react with liquid, can not corroded by liquid, indeformable. Gravity spheroid 17's quality is great relatively, should be according to the liquid proportion of jar body 1 splendid attire, the quality of reasonable adjustment gravity spheroid 17, ensure that self gravity can make it descend to contact with the arcwall face of concave type substrate 12, block up logical material hole 13, cut off A district and B district, gravity spheroid 17's top is connected with the bottom of hoisting unit, the top of locating cylinder 16 is worn out on the top of hoisting unit, the logical material passageway 14 and the liquid outlet 3 of second partition mechanism are linked together, hoisting unit mainly used is lifted up and descends gravity spheroid 17, and then make gravity spheroid 17 open and close logical material hole 13, the break-make in control A district and B district.

The lifting unit comprises a switch handle 19, a sealing ring 23, a cover plate 21 and a stop bolt 20, the cover plate 21 is arranged at the top end of the positioning cylinder 16 and is in sealing connection with the positioning cylinder, a second sealing ring 22 is sleeved outside the top end of the positioning cylinder 16 and is used for enabling the cover plate 21 and the positioning cylinder 16 to be in sealing connection, the sealing is guaranteed to be complete, the bottom end of the switch handle 19 is fixedly connected with the top end of the gravity ball body 17, the top end of the switch handle 19 penetrates out of the cover plate 21 and is provided with the stop bolt 20, the sealing ring 23 is arranged on the upper surface of the cover plate 21 and is sleeved on the switch handle 19, the sealing ring 23 is mainly used for preventing liquid in the sealing tank from splashing and isolating the outside, and meanwhile the up-down movement of the switch handle 19 is not hindered. When liquid in the area A needs to be introduced into the area B, the gravity ball 17 blocking the material passing hole 13 is pulled up by pulling the switch handle 19 upwards, the position of the switch handle 19 is fixed by the stop bolt 20, and because the concave base material close to the area A is connected with the bottom end of the tank body in a sealing manner, a material passing channel is reserved between the concave base material close to the area B and the bottom end of the tank body, the liquid stored in the area A enters the positioning barrel 16 through the liquid inlet hole 29, and then the liquid sequentially flows through the material passing hole 13 and the material passing channel 14 to enter the area B.

The top of the jar body 1 is provided with communicating pipe 4, and the bottom of communicating pipe 4 is linked together with the top of the jar body 1, and the top of communicating pipe 4 is provided with manhole cover 5, and the lower surface of manhole cover 5 is provided with first sealing washer 6, and communicating pipe 4 is located to first sealing washer 6 cover. The upper surface of the manhole cover 5 is provided with a pressure ball 7. The communicating pipe 4 and the manhole cover 5 are convenient for the tank body 1 to be used during access and maintenance in the manufacturing process, and the number of the manhole covers 5 on the top end of the tank body 1 can be set to be more than one according to actual conditions.

The specific implementation process of the embodiment 1 is as follows: the output pipeline 8 is externally connected with a delivery pump or a connecting pipeline, the liquid supply state is continuous, a switch 17 of a gravity ball 17 of a first partition mechanism and a second partition mechanism is opened by lifting a switch handle 19, liquid is delivered into the tank body 1 through a liquid inlet 2, the liquid supply is stopped until the tank body 1 is full, then an inner side switch 10 and an outer side switch 11 are opened to supply liquid for the connecting pipeline, when the output pipeline 8 has a problem, only a stop bolt 20 on the switch handle 19 of the second partition mechanism is required to be pulled down, the gravity ball 17 of the second partition mechanism descends, the liquid does not flow out from a liquid outlet 3 any more, in order to increase the safety coefficient, the gravity ball 17 of the first partition mechanism can be similarly descended to be abutted against the concave base material 12 to block the material through hole 13 by using the same method, after the maintenance is finished, the gravity ball 17 of the second partition mechanism can be lifted up firstly to perform trial run, after the output pipeline 8, the inner side switch 10 and the outer side switch 11 are determined to be good, and then the gravity ball 17 of the second partition mechanism is lifted, so that the liquid storage tank can safely convey liquid.

Embodiment 1 is mainly used for the storage to supply liquid in succession, when taking place liquid leakage on output pipeline 8, in time puts down the gravity spheroid 17 of second subregion mechanism, blocks up the liquid outlet 3 of jar body 1, prevents that the liquid in the jar body 1 from taking place to reveal, in order to increase factor of safety, can further put down the gravity spheroid 17 of first subregion mechanism, separates A district and B district through gravity spheroid 17 and safe subregion board 15.

Example 2

The lifting unit of embodiment 2 is different from that of embodiment 1, and the other structures are the same.

The lifting unit comprises a switch cover 26, a switch chain 24, a handle 27 and a claw fixing bolt 25, one side of the switch cover 26 is rotatably connected with the top end of the positioning cylinder 16, the other side of the switch cover 26 is matched with the claw fixing bolt 25 fixed on the positioning cylinder 16, when the switch cover 26 is closed, the claw fixing bolt 25 is mainly used for fixing the switch cover 26, a third sealing ring 28 fixed on the lower surface of the switch cover 26 is tightly combined with the switch opening, the tank body 1 is ensured to be in a sealing state, one end of the switch chain 24 is fixedly connected with the top end of the gravity ball 17, the other end of the switch chain 24 is fixedly connected with the lower surface of the switch cover 26, and the handle 27 is arranged on the upper surface of the switch cover 26. The switch cover 26 is lifted or lowered by the handle 27, the switch cover 26 drives the switch chain 24 to lift or lower the gravity ball 17, and the connection between the areas A and B is controlled.

The specific implementation process of the embodiment 2 is as follows: the output pipeline 8 is externally connected with a delivery pump or a connecting pipeline, the liquid is supplied discontinuously, the tank body 1 is filled with liquid through the liquid inlet 2, the gravity ball 17 of the first partition mechanism is put down, the gravity ball 17 of the second partition mechanism is lifted, after the liquid stored in the B partition is used up, the gravity ball 17 of the first partition mechanism is lifted, the liquid in the A partition flows into the B partition, the liquid amount in the B partition is controlled, the pressure on the output pipeline 8, the inner side switch 10, the outer side switch 11 and the sealing washer 9 is reduced, and the safety factor is improved.

Embodiment 2 mainly used storage discontinuous output demand's liquid, when loading and unloading material, the B district can vacate, does not splendid attire liquid, how much liquid just places how much liquid in the B district of using, can in addition before the maintenance, through external pump with the liquid in B district all take out A district or come out through the container splendid attire, not only reduce the waste of liquid, effectively avoid environmental pollution moreover.

Example 3

Embodiment 3 and embodiment 2's difference lie in that a plurality of first subregion mechanisms and a second subregion mechanism have set gradually along inlet 2 to outlet 3 in jar body 1, and a plurality of first subregion mechanisms divide into a plurality of liquid storage districts with jar body 1 between inlet 2 and the second subregion mechanism, and the space size in each liquid storage district can be the same also can be different, if meet special circumstances, can seal liquid in this district of liquid storage district, avoids taking place danger. The adjacent liquid storage areas are communicated with the material passing channel 14 through the liquid inlet hole 29 and the material passing hole 13, and the gravity ball 17 is used as a switch to control the on-off of the adjacent liquid storage areas by opening or blocking the material passing hole 13.

Embodiment 3 can regard as transportation type jar body 1, is provided with a plurality of gravity spheroid 17 switches in jar body 1, can inject liquid in the liquid storage district, in the transportation, makes in the liquid storage district be in full load state, effectively reduces the liquid in jar body 1 that does not use up and receives after traction force or brake force, and inside liquid forms to surge back and forth and produces the impact force to jar body 1, has improved the stability of haulage vehicle, reduces the static production volume between the liquid by a wide margin.

Therefore, the partitioned liquid storage tank with the high safety factor is adopted, the safety performance of the output end of the tank body is enhanced by the gravity ball of the second partition mechanism, liquid leakage cannot occur even if the inner side switch and the outer side switch fail simultaneously, the maintenance personnel can be ensured to be safer when replacing the outer switch, the gravity ball of the first partition mechanism and the safety partition plate form a controllable closed area together, and the safety factor is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.