阅读说明：本技术 一种物联网天然气检测及报警阀门 (Natural gas detection and alarm valve based on Internet of things ) 是由 王朝阳 王晓晓 王帅 吕强 徐东荣 胡朝辉 于 2020-07-27 设计创作，主要内容包括：本发明公开了一种物联网天然气检测及报警阀门,涉及阀门技术领域。包括阀门管道、警报盒、过滤架、定位块和固定盒,所述阀门管道的表面固定设置有警报盒,所述阀门管道的内部设置有过滤架和定位块,所述警报盒的表面固定设置有固定盒,所述固定盒的表面活动设置有盒门,所述警报盒的内部设置有警报器,所述警报器的一端通过电线固定连接有连接头。通过设置操作杆进行转动,使得操作杆带动第一齿轮进行转动,使得第一齿轮带动第二齿轮进行转动,如此使得第二齿轮带动螺纹杆向下移动,使得螺纹杆带动活动板移动至连接头的侧面,使得连接头的一侧完全被活动板覆盖,达到了便于保护连接头的效果,避免了连接头被空气环境中的物质腐蚀。(The invention discloses a natural gas detection and alarm valve for the Internet of things, and relates to the technical field of valves. Including valve pipeline, alarm box, filter frame, locating piece and fixed box, the fixed surface of valve pipeline is provided with the alarm box, the inside of valve pipeline is provided with filter frame and locating piece, the fixed surface of alarm box is provided with fixed box, the surperficial activity of fixed box is provided with the box door, the inside of alarm box is provided with the siren, the one end of siren is passed through electric wire fixedly connected with connector. Rotate through setting up the action bars for the action bars drives first gear and rotates, makes first gear drive second gear and rotates, so make second gear drive threaded rod move down, makes the threaded rod drive the fly leaf and remove to the side of connector, makes one side of connector cover by the fly leaf completely, has reached the effect of the protection connector of being convenient for, has avoided the connector to corrode by the material among the air circumstance.)

1. The utility model provides a thing networking natural gas detection and alarm valve, includes valve pipeline (1), alarm box (2), crosses filter stand (3), locating piece (4) and fixed box (13), its characterized in that: the surface of the valve pipeline (1) is fixedly provided with an alarm box (2), the interior of the valve pipeline (1) is provided with a filter rack (3) and a positioning block (4), the surface of the alarm box (2) is fixedly provided with a fixed box (13), and the surface of the fixed box (13) is movably provided with a box door (38);

an alarm (6) is arranged in the alarm box (2), one end of the alarm (6) is fixedly connected with a connector (7) through an electric wire, a movable plate (8) is movably arranged on the surface of the alarm box (2), and a threaded rod (9) is fixedly mounted at the top of the movable plate (8);

a first gear (14) is movably arranged in the fixed box (13), an operating rod (15) is fixedly installed at the center of the top of the first gear (14), a second gear (16) is movably arranged on one side of the first gear (14), and the top of the threaded rod (9) extends into the fixed box (13) and is movably connected with the inside of the second gear (16);

a telescopic loop bar (18) is fixedly arranged in the fixed box (13), and a loop block (20) which is in contact with the operating rod (15) is fixedly arranged at the bottom of the telescopic loop bar (18);

a moving rod (24) is movably arranged on the surface of the fixed box (13), a baffle (25) is arranged at one end of the moving rod (24), and a sealing block (27) is fixedly arranged at the bottom of the baffle (25);

a filter screen (28) is fixedly arranged in the filter frame (3), a sealing ring (29) is fixedly arranged on the outer surface of the filter frame (3), rotating blocks (30) are fixedly arranged at the top and the bottom of the filter frame (3), and the surfaces of the rotating blocks (30) are rotatably connected with the valve pipeline (1) through rotating grooves (31);

locating slot (32) have been seted up to the inside of valve pipeline (1), the upper surface and the lower surface of locating piece (4) are located the inside of locating slot (32) and the surface of filter rack (3) respectively, the top fixed mounting of locating piece (4) has rope body (35).

2. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: the surface of alarm box (2) has been seted up circular telegram groove (5), connector (7) are located the inside of circular telegram groove (5), fly leaf (8) cover is in the side of circular telegram groove (5).

3. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: two chutes (10) are formed in the surface of the alarm box (2), sliding blocks (11) which slide in the chutes (10) respectively are fixedly mounted on the side surfaces of the movable plate (8), fixed blocks (12) are fixedly mounted on the surface of the alarm box (2), and the fixed blocks (12) are penetrated through the bottom of the movable plate (8).

4. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: the inside fixed mounting of fixed box (13) has two connecting rods (21), annular spread groove (22) have been seted up to the bottom of second gear (16), the top of connecting rod (21) slides in the inside of spread groove (22).

5. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: the surface of the fixed box (13) is provided with a communication port (17), the threaded rod (9) is located under the communication port (17), the sealing block (27) covers the surface of the communication port (17), and the baffle plate (25) is fixedly connected with the moving rod (24) through a sealing spring (26).

6. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: the telescopic spring (19) is fixedly mounted inside the telescopic loop bar (18), and the top of the operating rod (15) extends to the inside of the loop block (20).

7. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: a moving groove (23) is formed in the depression surface of the fixed box (13), and the bottom of the moving rod (24) slides in the moving groove (23).

8. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: lifting groove (33) have been seted up to the inside of constant head tank (32), the side fixed mounting of locating piece (4) has elevator (34), the one end of elevator (34) slides in the inside of lifting groove (33).

9. The internet of things natural gas detection and alarm valve of claim 1, characterized in that: the inside fixed mounting of constant head tank (32) has limiting plate (37), limiting plate (37) and fixedly connected with pull block (36) are run through to the one end of rope body (35).

Technical Field

The invention relates to the technical field of valves, in particular to a natural gas detection and alarm valve of the Internet of things.

Background

The valve is a control component in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, is used for a fluid control system, has quite a plurality of varieties and specifications from the simplest stop valve to various valves used in a very complicated automatic control system, can be used for controlling the flow of various fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, is divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum vanadium steel valves, dual-phase steel valves, plastic valves, nonstandard manufactured valve materials and the like according to the material quality, is one of electronic valves, combines an alarm with the valve, and is basically used for natural gas detection.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an Internet of things natural gas detection and alarm valve, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the natural gas detection and alarm valve comprises a valve pipeline, an alarm box, a filter frame, a positioning block and a fixing box, wherein the alarm box is fixedly arranged on the surface of the valve pipeline, the filter frame and the positioning block are arranged inside the valve pipeline, the fixing box is fixedly arranged on the surface of the alarm box, and a box door is movably arranged on the surface of the fixing box;

an alarm is arranged in the alarm box, one end of the alarm is fixedly connected with a connector through an electric wire, a movable plate is movably arranged on the surface of the alarm box, and a threaded rod is fixedly mounted at the top of the movable plate;

a first gear is movably arranged in the fixed box, an operating rod is fixedly arranged at the center of the top of the first gear, a second gear is movably arranged on one side of the first gear, and the top of the threaded rod extends into the fixed box and is movably connected with the inside of the second gear;

a telescopic loop bar is fixedly arranged in the fixed box, and a loop block which is contacted with the operating rod is fixedly arranged at the bottom of the telescopic loop bar;

a movable rod is movably arranged on the surface of the fixed box, a baffle is arranged at one end of the movable rod, and a sealing block is fixedly arranged at the bottom of the baffle;

a filter screen is fixedly arranged in the filter frame, a sealing ring is fixedly arranged on the outer surface of the filter frame, rotating blocks are fixedly arranged at the top and the bottom of the filter frame, and the surfaces of the rotating blocks are rotatably connected with a valve pipeline through rotating grooves;

the valve pipeline is characterized in that the positioning groove is formed in the valve pipeline, the upper surface and the lower surface of the positioning block are respectively located in the positioning groove and on the surface of the filter frame, and the rope body is fixedly mounted at the top of the positioning block.

As a preferable technical solution of the present invention, a power-on groove is formed on a surface of the alarm box, the connector is located inside the power-on groove, and the movable plate covers a side surface of the power-on groove.

As a preferred technical scheme of the present invention, two sliding grooves are formed in the surface of the alarm box, sliding blocks which respectively slide in the sliding grooves are fixedly mounted on the side surfaces of the movable plate, a fixed block is fixedly mounted on the surface of the alarm box, and the bottom of the movable plate penetrates through the fixed block.

As a preferable technical solution of the present invention, two connecting rods are fixedly installed inside the fixing box, an annular connecting groove is formed at the bottom of the second gear, and the top of the connecting rod slides inside the connecting groove.

As a preferable technical solution of the present invention, a communication port is formed in a surface of the fixing box, the threaded rod is located right below the communication port, the sealing block covers a surface of the communication port, and the baffle plate is fixedly connected to the moving rod through a sealing spring.

As a preferable technical solution of the present invention, a telescopic spring is fixedly installed inside the telescopic loop bar, and the top of the operating bar extends to the inside of the loop block.

In a preferred embodiment of the present invention, the top surface of the fixing box is provided with a moving groove, and the bottom of the moving rod slides inside the moving groove.

As a preferable technical scheme of the present invention, a lifting groove is formed in the positioning groove, a lifting block is fixedly mounted on a side surface of the positioning block, and one end of the lifting block slides in the lifting groove.

According to a preferable technical scheme of the invention, a limiting plate is fixedly mounted inside the positioning groove, and one end of the rope body penetrates through the limiting plate and is fixedly connected with a pulling block.

Compared with the prior art, the invention provides an Internet of things natural gas detection and alarm valve, which has the following beneficial effects:

1. this thing networking natural gas detection and alarm valve rotates through setting up the action bars for the action bars drives first gear and rotates, makes first gear drive second gear rotate, so makes second gear drive threaded rod move down, makes the threaded rod drive the side that the fly leaf removed to the connector, makes one side of connector cover by the fly leaf completely, has reached the effect of the protection connector of being convenient for, has avoided the connector to corrode by the material among the air circumstance.

2. This thing networking natural gas detects and alarm valve utilizes expanding spring's elasticity to keep the position state under no exogenic action by itself through setting up flexible loop bar for flexible loop bar utilizes the position of the fixed action bars of sleeve block, later rotates the box door, makes the box door can seal fixed box, has avoided external non-staff to open fixed box and has removed the fly leaf, has reached the effect of stable fixed fly leaf position.

3. This thing networking natural gas detects and alarm valve through setting up baffle rebound and compression sealing spring for separation between sealed piece and the fixed box, later translation carriage release lever makes the carriage release lever drive the baffle and removes to the top of intercommunication mouth, makes sealed piece seal the surface of intercommunication mouth under sealing spring's resilience, has reached the effect of sealed intercommunication mouth, has avoided the rainwater can get into the inside of fixed box through the intercommunication mouth.

4. This thing networking natural gas detection and alarm valve drives the locating piece rebound through setting up the rope body for separation between locating piece and the filter stand, later level rotate the filter stand, make the filter stand rotate ninety degrees, so make things convenient for the change installation work of staff to the filter screen, reached the effect of being convenient for to change the installation, thereby kept the device's normal filter effect.

Drawings

Fig. 1 is a schematic structural diagram of a natural gas detection and alarm valve of the internet of things, which is provided by the invention;

FIG. 2 is a sectional plan view of a structural alarm box of the natural gas detection and alarm valve of the Internet of things, which is provided by the invention;

FIG. 3 is a front sectional view of a structural fixing box of the natural gas detection and alarm valve of the Internet of things, which is provided by the invention;

FIG. 4 is a front sectional view of a second gear of the structure of the natural gas detection and alarm valve of the Internet of things, provided by the invention;

FIG. 5 is a front sectional view of a structural valve pipeline of the natural gas detection and alarm valve of the Internet of things, provided by the invention;

FIG. 6 is a front sectional view of a structural positioning groove of an Internet of things natural gas detection and alarm valve provided by the invention;

fig. 7 is a schematic view of a structural filter frame of the natural gas detection and alarm valve of the internet of things.

In the figure: 1. a valve conduit; 2. an alarm box; 3. a filter frame; 4. positioning blocks; 5. a current-carrying groove; 6. an alarm; 7. a connector; 8. a movable plate; 9. a threaded rod; 10. a chute; 11. a slider; 12. a fixed block; 13. a fixing box; 14. a first gear; 15. an operating lever; 16. a second gear; 17. a communication port; 18. a telescopic loop bar; 19. a tension spring; 20. sleeving blocks; 21. a connecting rod; 22. connecting grooves; 23. a moving groove; 24. a travel bar; 25. a baffle plate; 26. a seal spring; 27. a sealing block; 28. a filter screen; 29. a seal ring; 30. rotating the block; 31. rotating the groove; 32. positioning a groove; 33. a lifting groove; 34. a lifting block; 35. a rope body; 36. pulling the block; 37. a limiting plate; 38. and a box door.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the natural gas detection and alarm valve for the internet of things comprises a valve pipeline 1, an alarm box 2, a filter frame 3, a positioning block 4 and a fixing box 13, wherein the alarm box 2 is fixedly arranged on the surface of the valve pipeline 1, the filter frame 3 and the positioning block 4 are arranged inside the valve pipeline 1, the fixing box 13 is fixedly arranged on the surface of the alarm box 2, and a box door 38 is movably arranged on the surface of the fixing box 13;

an alarm 6 is arranged inside the alarm box 2, the type of the alarm 6 is DN15, one end of the alarm 6 is fixedly connected with a connector 7 through an electric wire, a movable plate 8 is movably arranged on the surface of the alarm box 2, and a threaded rod 9 is fixedly arranged at the top of the movable plate 8;

a first gear 14 is movably arranged inside the fixed box 13, an operating rod 15 is fixedly installed at the center of the top of the first gear 14, a second gear 16 is movably arranged on one side of the first gear 14, the top of the threaded rod 9 extends into the fixed box 13 and is movably connected with the inside of the second gear 16, and the operating rod 15 is arranged to rotate, so that the operating rod 15 drives the first gear 14 to rotate, the first gear 14 drives the second gear 16 to rotate, the second gear 16 drives the threaded rod 9 to move downwards, the threaded rod 9 drives the movable plate 8 to move to the side face of the connector 7, one side of the connector 7 is completely covered by the movable plate 8, the effect of protecting the connector 7 is achieved, and the connector 7 is prevented from being corroded by substances in an air environment;

a telescopic loop bar 18 is fixedly arranged in the fixed box 13, a loop block 20 in contact with the operating rod 15 is fixedly arranged at the bottom of the telescopic loop bar 18, the telescopic loop bar 18 is arranged to keep the position state of the telescopic loop bar 18 under the action of no external force by utilizing the elasticity of a telescopic spring 19, so that the telescopic loop bar 18 fixes the position of the operating rod 15 by utilizing the loop block 20, and then the box door 38 is rotated, so that the fixed box 13 can be sealed by the box door 38, the phenomenon that external non-working personnel open the fixed box 13 to move the movable plate 8 is avoided, and the effect of stabilizing the position of the fixed movable plate 8 is achieved;

the surface of the fixed box 13 is movably provided with a movable rod 24, one end of the movable rod 24 is provided with a baffle plate 25, the bottom of the baffle plate 25 is fixedly provided with a sealing block 27, the baffle plate 25 moves upwards and compresses a sealing spring 26, so that the sealing block 27 is separated from the fixed box 13, then the movable rod 24 is translated, so that the movable rod 24 drives the baffle plate 25 to move above the communicating port 17, the sealing block 27 seals the surface of the communicating port 17 under the resilience of the sealing spring 26, the effect of sealing the communicating port 17 is achieved, and rainwater is prevented from entering the inside of the fixed box 13 through the communicating port 17;

a filter screen 28 is fixedly arranged in the filter frame 3, a sealing ring 29 is fixedly arranged on the outer surface of the filter frame 3, rotary blocks 30 are fixedly arranged at the top and the bottom of the filter frame 3, and the surfaces of the rotary blocks 30 are rotatably connected with the valve pipeline 1 through rotary grooves 31;

constant head tank 32 has been seted up to valve pipeline 1's inside, the upper surface and the lower surface of locating piece 4 are located the inside of constant head tank 32 and filter frame 3's surface respectively, the top fixed mounting of locating piece 4 has the rope body 35, drives locating piece 4 rebound through setting up the rope body 35 for separation between locating piece 4 and the filter frame 3, later level rotates filter frame 3, makes filter frame 3 rotate ninety degrees, so makes things convenient for the staff to filter screen 28's change installation work, has reached the effect of being convenient for change installation, thereby has kept the device's normal filter effect.

As a specific technical solution of this embodiment, a power-on slot 5 is formed on a surface of the alarm box 2, the connector 7 is located inside the power-on slot 5, and the movable plate 8 covers a side surface of the power-on slot 5.

In this embodiment, the movable plate 8 is covered on the side surface of the power-on slot 5, so that the movable plate 8 can isolate the connector 7 from external direct contact, and the movable plate 8 can protect the connector 7 from external direct damage, thereby achieving the protection effect.

As a specific technical solution of this embodiment, two sliding grooves 10 are formed in the surface of the alarm box 2, sliding blocks 11 that respectively slide inside the sliding grooves 10 are fixedly mounted on the side surface of the movable plate 8, a fixed block 12 is fixedly mounted on the surface of the alarm box 2, and the fixed block 12 is penetrated through the bottom of the movable plate 8.

In this embodiment, the side fixed mounting of the movable plate 8 is provided with the sliding blocks 11 respectively sliding in the sliding grooves 10, so that the sliding grooves 10 can limit the moving state of the movable plate 8, the movable plate 8 is always attached to the alarm box 2, the bottom of the movable plate 8 is recycled to penetrate through the fixed block 12, the bottom of the movable plate 8 can be fixed by the fixed block 12, and the fixing effect is achieved.

As a specific technical solution of this embodiment, two connecting rods 21 are fixedly installed inside the fixed box 13, an annular connecting groove 22 is opened at the bottom of the second gear 16, and the top of the connecting rod 21 slides inside the connecting groove 22.

In this embodiment, annular connecting groove 22 has been seted up to the bottom that utilizes second gear 16, and the top of connecting rod 21 slides in the inside of connecting groove 22 for connecting rod 21 has restricted second gear 16's removal through connecting groove 22, has avoided second gear 16 to appear the ascending removal of vertical direction, has reached convenient pivoted effect.

As a specific technical solution of this embodiment, the fixed box 13 has a communication port 17 formed on a surface thereof, the threaded rod 9 is located directly below the communication port 17, the sealing block 27 covers the surface of the communication port 17, and the baffle 25 is fixedly connected to the movable rod 24 through a sealing spring 26.

In this embodiment, utilize threaded rod 9 to be located intercommunication mouth 17 under, make threaded rod 9 can extend to the top of fixed box 13 through intercommunication mouth 17, the condition that can appear mutual hindrance between the fixed box 13 when having avoided threaded rod 9 rebound, recycle sealed piece 27 and cover the surface of intercommunication mouth 17, the inside that the rainwater can get into fixed box 13 through intercommunication mouth 17 has been avoided, waterproof effect has been reached, recycle and pass through sealing spring 26 fixed connection between baffle 25 and the carriage release lever 24, direct friction between sealed piece 27 and the fixed box 13 when having avoided baffle 25 horizontal migration, the effect of protection sealed piece 27 has been reached.

As a specific solution of this embodiment, a telescopic spring 19 is fixedly installed inside the telescopic sleeve rod 18, and the top of the operating rod 15 extends to the inside of the sleeve block 20.

In this embodiment, the telescopic spring 19 fixedly installed inside the telescopic loop bar 18 is utilized, so that the loop block 20 can keep the position state of the loop block through the elasticity of the telescopic spring 19, the top of the operating rod 15 is recycled to extend to the inside of the loop block 20, the loop block 20 can fixedly limit the rotation of the operating rod 15, and the effect of fixing and limiting is achieved.

As a specific solution of this embodiment, the top surface of the fixed box 13 is provided with a moving slot 23, and the bottom of the moving rod 24 slides inside the moving slot 23.

In this embodiment, the bottom of the moving rod 24 slides inside the moving groove 23, so that the moving groove 23 can limit the moving direction of the moving rod 24, and the moving rod 24 is prevented from being separated from the fixed box 13.

As a specific technical solution of this embodiment, a lifting groove 33 is formed in the positioning groove 32, a lifting block 34 is fixedly mounted on a side surface of the positioning block 4, and one end of the lifting block 34 slides in the lifting groove 33.

In this embodiment, one end of the lifting block 34 slides in the lifting groove 33, so that the lifting groove 33 can control the moving direction and the moving state of the positioning block 4 through the lifting block 34, thereby avoiding the situation of shaking and shifting of the positioning block 4 during moving, and achieving the effect of determining the moving situation of the positioning block 4.

As a specific technical solution of this embodiment, a limiting plate 37 is fixedly installed inside the positioning groove 32, and one end of the rope 35 penetrates through the limiting plate 37 and is fixedly connected with a pulling block 36.

In this embodiment, the inside fixed mounting who utilizes constant head tank 32 has limiting plate 37, and the one end of the rope body 35 runs through limiting plate 37 and fixedly connected with draws piece 36 for the staff conveniently operates rope body 35 through drawing piece 36, and draws the removal of piece 36 through limiting plate 37 restriction, has reached the effect of accuse position.

In use, the baffle 25 is moved, the baffle 25 drives the sealing block 27 to move upwards and compress the sealing spring 26, the sealing block 27 is separated from the fixed box 13, the moving rod 24 is translated, the baffle 25 is moved away from the upper side of the communication opening 17, the surface of the communication opening 17 is opened, the fixed box 13 is opened by the operation box door 38, a worker can extend a handle into the fixed box 13 to operate, the sleeve block 20 is moved upwards, the telescopic sleeve rod 18 and the telescopic spring 19 are compressed, the sleeve block 20 is separated from the operation rod 15, the operation rod 15 is rotated, the operation rod 15 drives the first gear 14 to rotate, the first gear 14 drives the second gear 16 to rotate, the second gear 16 drives the threaded rod 9 to move upwards, the top of the threaded rod 9 penetrates through the communication opening 17, the threaded rod 9 drives the movable plate 8 to move away from the side of the connecting head 7, so that one side of the connector 7 is completely opened, then the sleeve block 20 is loosened, the telescopic sleeve rod 18 drives the sleeve block 20 to move downwards under the resilience of the telescopic spring 19, the sleeve block 20 fixes the position of the operating rod 15 again, so that a worker can use the connector 7 and start the alarm 6, and after the work is finished, the work is operated in the reverse direction, so that one side of the connector 7 is covered and protected by the movable plate 8 again; when filter screen 28 needs to be cleaned and replaced, pull block 36 is pulled downwards, so that pull block 36 utilizes rope 35 to drive positioning block 4 to move upwards, so that positioning block 4 and filter frame 3 are separated, then filter frame 3 is horizontally rotated, so that filter frame 3 is rotated ninety degrees, the replacement and installation work of filter screen 28 by workers is facilitated, the work is completed and the work is reversely operated, and new filter screen 28 can be used for filtering again.

In summary, the natural gas detection and alarm valve for the internet of things is provided with the operating rod 15 to rotate, so that the operating rod 15 drives the first gear 14 to rotate, the first gear 14 drives the second gear 16 to rotate, the second gear 16 drives the threaded rod 9 to move downwards, the threaded rod 9 drives the movable plate 8 to move to the side face of the connector 7, one side of the connector 7 is completely covered by the movable plate 8, the effect of protecting the connector 7 is achieved, and the connector 7 is prevented from being corroded by substances in an air environment; the position state of the telescopic loop bar 18 is kept under the action of no external force by the elasticity of the telescopic spring 19, so that the telescopic loop bar 18 fixes the position of the operating rod 15 by the loop block 20, and then the box door 38 is rotated, so that the box door 38 can seal the fixed box 13, the phenomenon that external non-workers open the fixed box 13 to move the movable plate 8 is avoided, and the effect of stabilizing the position of the fixed movable plate 8 is achieved; the baffle plate 25 moves upwards and compresses the sealing spring 26, so that the sealing block 27 is separated from the fixed box 13, then the movable rod 24 is translated, the movable rod 24 drives the baffle plate 25 to move above the communicating opening 17, the sealing block 27 seals the surface of the communicating opening 17 under the resilience of the sealing spring 26, the effect of sealing the communicating opening 17 is achieved, and rainwater is prevented from entering the inside of the fixed box 13 through the communicating opening 17; through setting up rope 35 and driving 4 rebound of locating piece for separation between locating piece 4 and the filter stand 3, later level rotates filter stand 3, makes filter stand 3 rotate ninety degrees, makes things convenient for the change installation work of staff to filter screen 28 so, has reached the effect of being convenient for change installation, thereby has kept the device's normal filter effect.

It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

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.