Gas collecting hood with automatic opening and closing function

Abstract

The utility model discloses a gas-collecting hood with an automatic opening and closing function, which comprises a gas-collecting hood main body, an exhaust pipe is integrally formed at the top end of the gas-collecting hood main body, and a plurality of concentration detection sensors for detecting the concentration of waste gas are arranged on the side wall of the gas-collecting hood main body; the opening and closing control pipe is fixedly installed at the top end of the exhaust pipe, an opening and closing installation cylinder is arranged in the opening and closing control pipe, and a rotating ball provided with an airflow channel is rotationally installed in the opening and closing installation cylinder; the bottom end of the connecting seat cylinder is fixedly mounted at the top end of the on-off control pipe through a connecting pipe, and a controller is fixedly mounted on the front surface. The waste gas concentration is monitored in real time through the concentration detection sensor, the air flow channel and the exhaust fan are automatically opened and closed through the controller according to the waste gas concentration, the whole device is relatively automatic, excessive manual supervision is not needed, waste gas dissipation is effectively avoided, waste gas can be fully and intensively collected and guided, and the waste gas treatment efficiency is improved. The possibility of accidents is relatively small, and the whole device is more stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of gas collection hood technology, and in particular to a gas collection hood with automatic opening and closing function. Background Technology

[0002] In existing technologies, fume hoods are collection devices for pollution sources in flue gas purification systems. They guide dust and gaseous pollutants into the purification system while preventing their diffusion into the production workshop and atmosphere, thus preventing pollution. Their performance directly impacts the technical and economic indicators of the purification system. Due to differences in the structure of pollution source equipment and production processes, fume hoods come in various forms. However, existing fume hoods generally use extraction structures (fans, etc.) to discharge exhaust gases.

[0003] A search revealed that Chinese patent application number 202420048407.0 discloses a fiberglass gas collection hood, comprising a gas collection hood body, an exhaust structure mounted on the gas collection hood body, a gas washing structure mounted on the exhaust structure, a guiding structure and a spraying structure mounted on the gas washing structure, the spraying structure mounted on the exhaust structure; the exhaust structure includes an exhaust pipe mounted on the gas collection hood body, a one-way valve body mounted in the middle of the exhaust pipe, an exhaust cover mounted at the top of the exhaust pipe, multiple support legs mounted on the gas collection hood body, gas washing boxes mounted on the multiple support legs, and an exhaust pipe mounted on one side of the gas washing box.

[0004] The aforementioned patent has the following shortcomings: the device can controllably open a one-way valve to partially exhaust the waste gas, reduce the gas mass inside the gas collection hood, and prevent waste gas leakage; however, in actual use, the one-way valve will only open when the air inside the gas collection hood reaches a certain level and generates a certain pressure. Since the bottom of the gas collection hood is an opening, there is a certain degree of uncertainty in forming sufficient pressure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a gas collection hood with automatic opening and closing function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A gas collection hood with automatic opening and closing function includes:

[0008] The main body of the gas collection hood has an exhaust pipe integrally formed at the top and multiple concentration detection sensors for detecting the concentration of exhaust gas installed on the side wall.

[0009] An opening and closing control tube is fixedly installed at the top of the exhaust pipe and has an opening and closing mounting cylinder inside. A rotating ball with an airflow channel is rotatably installed inside the opening and closing mounting cylinder.

[0010] A connecting base is fixedly installed at its bottom end to the top of the opening and closing control tube via a connecting pipe, and a controller is fixedly installed on its front side; a fan mounting bracket is fixedly installed inside the connecting base, and an exhaust fan is fixedly installed inside the fan mounting bracket.

[0011] As a further improvement of this utility model: a lower bushing and an upper bushing are respectively provided above and below the rotating ball, both of which are fixedly installed inside the opening and closing mounting cylinder.

[0012] As a further improvement of this utility model: a positioning mounting cylinder is fixedly connected to one side of the opening and closing control tube, and a rotation control shaft is rotatably mounted inside the positioning mounting cylinder.

[0013] As a further embodiment of this utility model: one end of the rotation control shaft is fixedly connected to the rotating ball, and the other end is fixedly installed with a coupling.

[0014] As a further improvement of this utility model: a servo motor is provided on one side of the opening and closing control tube, and the output shaft of the servo motor is fixedly connected to the coupling.

[0015] As a further improvement of this utility model: multiple support poles are fixedly installed at the top of the opening and closing mounting cylinder, and a multi-arm mounting frame is fixedly installed at the top of the support poles.

[0016] As a further improvement of this utility model: a lifting mounting tube is slidably installed inside the multi-arm mounting frame, and a concave sealing plate is fixedly installed at the bottom end of the lifting mounting tube.

[0017] As a further embodiment of this utility model: a concave floating plate is fixedly sleeved on the top of the outer wall of the lifting installation pipe, and a fixing pressure ring is provided at the top of the concave floating plate.

[0018] Compared with the prior art, this utility model provides a gas collection hood with automatic opening and closing function, which has the following beneficial effects:

[0019] 1. This gas collection hood with automatic opening and closing function monitors the concentration of exhaust gas in real time through a concentration detection sensor. The controller automatically opens and closes the airflow channel and exhaust fan according to the concentration of exhaust gas. The whole device is relatively automated and does not require much manual supervision. At the same time, it effectively prevents exhaust gas from escaping. It can fully collect and guide exhaust gas for treatment. The possibility of accidents is relatively small, and the whole device is more stable and reliable.

[0020] 2. The gas collection hood with automatic opening and closing function, through the cooperation of the concave sealing plate and the concave floating plate, performs a second sealing of the exhaust gas flow channel on the basis of sealing the airflow channel, which facilitates the exhaust fan to discharge the exhaust gas remaining in the connecting pipe, reduces the impact of exhaust gas on the exhaust fan, and improves the reliability of the device.

[0021] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the overall assembly of this utility model;

[0023] Figure 2 This is a partial cross-sectional view of the overall assembly of this utility model.

[0024] Figure 3 This utility model Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0025] Figure 4 This utility model Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0026] In the diagram: 1. Main body of the gas collection hood; 2. Exhaust pipe; 3. Opening / closing control pipe; 4. Connecting pipe; 5. Connecting seat; 6. Guide pipe; 7. Mounting sleeve; 8. Concentration detection sensor; 9. Servo motor; 10. Motor mounting bracket; 11. Fixed connecting column; 12. Controller; 13. Opening / closing mounting sleeve; 14. Lower bushing; 15. Rotating ball; 16. Airflow channel; 17. Positioning mounting sleeve; 18. Rotation control shaft; 19. Coupling; 20. Upper bushing; 21. Support pole; 22. Multi-arm mounting bracket; 23. Lifting mounting pipe; 24. Lower concave sealing plate; 25. Upper concave floating plate; 26. Fixed pressure ring; 27. Fan mounting bracket; 28. Exhaust fan; 29. ​​Wire mounting nozzle. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] A gas collection hood with automatic opening and closing function, such as Figures 1 to 4As shown, it includes: a gas collection hood body 1, an opening and closing control pipe 3, and a connecting seat 5. The top of the gas collection hood body 1 is integrally formed with an exhaust pipe 2, and the opening and closing control pipe 3 is fixedly installed on the top of the exhaust pipe 2. The bottom of the connecting seat 5 is integrally formed with a connecting pipe 4, which is fixedly installed on the top of the opening and closing control pipe 3. A guide pipe 6 is fixedly installed on the top of the connecting pipe 4. The guide pipe 6 guides the waste gas collected by the gas collection hood body 1 to the inside of the waste gas treatment device, such as a gas scrubbing device or a purification device.

[0029] Reference Figure 1 The main body 1 of the gas collection hood is shaped like a frustum, and each of its side walls is welded with a mounting sleeve 7. The mounting sleeve 7 is equipped with a concentration detection sensor 8 for detecting the concentration of exhaust gas. The main body 1 of the gas collection hood disclosed in this application is shaped like a frustum, and each side wall is provided with multiple concentration detection sensors 8 (one is shown in the figure). In actual application, the shape of the main body 1 of the gas collection hood can be selected as needed, and the number of concentration detection sensors 8 can be adjusted by the user. The concentration detection sensor 8 is a gas sensor. The corresponding sensor is selected according to the actual exhaust gas composition collected by the main body 1 of the gas collection hood. The gas sensor is an existing mature technology, and its specific structure and model can be selected by the user and will not be described in detail here.

[0030] The opening and closing control tube 3 is equipped with an opening and closing mounting cylinder 13. Multiple bolts are installed on both sides of the opening and closing mounting cylinder 13 to fix the opening and closing mounting cylinder 13 to the opening and closing control tube 3. A rotating ball 15 is rotatably installed inside the opening and closing mounting cylinder 13. An airflow channel 16 is opened at the top of the rotating ball 15 for guiding the exhaust gas.

[0031] The rotating ball 15 is provided with a lower bushing 14 and an upper bushing 20 at its upper and lower sides, respectively. Both are fixedly installed inside the opening and closing mounting cylinder 13, and both are set in a ring shape with an inner diameter larger than the inner diameter of the airflow channel 16.

[0032] A positioning mounting cylinder 17 is fixedly connected to one side of the opening and closing control pipe 3. The inner cavity of the positioning mounting cylinder 17 passes through the pipe body of the opening and closing control pipe 3 and the cylinder body of the opening and closing mounting cylinder 13. A rotation control shaft 18 is rotatably installed inside the positioning mounting cylinder 17. One end of the rotation control shaft 18 is fixedly connected to the rotating ball 15, and the other end is fixedly installed with a coupling 19. The axis of the rotation control shaft 18 is perpendicular to the axis of the airflow channel 16.

[0033] A servo motor 9 is installed on one side of the opening and closing control tube 3, which is mounted on the rotation control shaft 18. The output shaft of the servo motor 9 is fixedly connected to the coupling 19. A motor mounting bracket 10 is fixedly installed on the outer wall of the servo motor 9. Multiple fixed connecting columns 11 are welded to one side of the motor mounting bracket 10. The fixed connecting columns 11 are fixedly connected to the side wall of the opening and closing control tube 3.

[0034] The top four corners of the opening and closing mounting cylinder 13 are provided with mounting holes. Support rods 21 are fixedly installed inside the mounting holes. Multi-arm mounting brackets 22 are fixedly installed on the top of the four support rods 21. A mounting groove is provided in the middle of the top of the multi-arm mounting bracket 22.

[0035] The inside of the mounting groove is equipped with a lifting mounting tube 23, and the bottom end of the lifting mounting tube 23 is fixedly equipped with a concave sealing plate 24. The concave surface of the concave sealing plate 24 is spherical and adapted to the rotating ball 15. The concave sealing plate 24 is also slidably engaged with the inside of the upper bushing 20.

[0036] A concave floating plate 25 is fixedly sleeved on the top of the outer wall of the lifting installation pipe 23. A fixing pressure ring 26 is provided at the top of the concave floating plate 25. The fixing pressure ring 26 is threaded onto the outer wall of the lifting installation pipe 23. The top of the concave floating plate 25 is set as a concave surface, and the thickness of the plate is uniform.

[0037] The diameter of the upper concave floating plate 25 is larger than that of the lower concave sealing plate 24, and both the upper concave floating plate 25 and the lower concave sealing plate 24 are made of corrosion-resistant lightweight materials, such as foam with anti-corrosion paint sprayed on the surface; the airflow that facilitates the flow of air will lift them up.

[0038] A fan mounting bracket 27 is fixedly installed inside the connecting base 5. An exhaust fan 28 is fixedly installed inside the fan mounting bracket 27. A wire mounting nozzle 29 is fixedly connected to one side of the connecting base 5. The inner cavity of the wire mounting nozzle 29 passes through the cylinder body of the connecting base 5 and the fan mounting bracket 27. A wire connected to the exhaust fan 28 is installed inside the wire mounting nozzle 29.

[0039] A controller 12 is fixedly installed on the front of the connecting base 5. The controller 12 is used to control the start and stop of the exhaust fan 28 and its working power. The concentration detection sensor 8 detects the concentration of the exhaust gas in the main body 1 of the gas collection hood, and then feeds the detection data back to the controller 12. The controller 12 determines whether to start the servo motor 9 and the exhaust fan 28 based on the detection data.

[0040] Working principle:

[0041] Please refer to Figures 1 to 4 Assemble the device as shown in the figure. When using the device, install it in the designated position to collect the exhaust gas generated at the fixed position. Select the corresponding concentration detection sensor 8 according to the composition of the exhaust gas and set the upper and lower limit parameters of the corresponding exhaust gas concentration in the controller 12.

[0042] Exhaust gas enters the main body 1 of the gas collection hood. The concentration detection sensor 8 detects the exhaust gas concentration. If the exhaust gas concentration reaches or exceeds the preset upper limit, the controller 12 starts the servo motor 9 based on the feedback data. The servo motor 9 drives the rotating ball 15 to rotate 90 degrees through the coupling 19 and the rotation control shaft 18. The axis of the airflow channel 16 is in the same direction as the upward airflow (e.g., Figure 2 As shown, the controller 12 synchronously turns on the exhaust fan 28, guiding the airflow below to the guide pipe 6; the exhaust gas entering the airflow channel 16 lifts the concave sealing plate 24, and the exhaust fan 28 draws air from the surrounding air of the lifting mounting pipe 23, making the surrounding air pressure lower than the air pressure inside the airflow channel 16, thereby causing the concave sealing plate 24 to rise and detach from the upper bushing 20. The exhaust gas inside the airflow channel 16 enters the connecting pipe 4. As the exhaust gas continues to enter and is drawn by the exhaust fan 28, the flow speed of the exhaust gas increases, generating an upward thrust on the upper concave floating plate 25, causing the concave sealing plate 24 to fit against the lower surface of the multi-arm mounting frame 22, and the exhaust gas is quickly guided into the guide pipe 6; when the concentration detection sensor 8 detects that the exhaust gas concentration is lower than the preset lower limit of exhaust gas concentration, the controller 12 controls the rotating ball 15 to rotate 90 degrees in the opposite direction through the servo motor 9, closing the airflow channel 16. At this time, the exhaust fan 28 continues to run for three minutes to discharge the residual exhaust gas inside the connecting pipe 4 to the maximum extent, and then the exhaust fan 28 is turned off.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hood with automatic opening and closing function, characterized in that, The utility model relates to a kind of exhaust gas concentration detection device, including: Gas hood body (1), its top end is integrally formed with exhaust pipe (2), and side wall is equipped with multiple concentration detection sensors (8) for detecting exhaust gas concentration; Opening and closing control pipe (3), it is fixedly installed in the top end of exhaust pipe (2), and inside is provided with opening and closing mounting cylinder (13), rotating ball (15) being provided with airflow passage (16) is rotatably installed in the inside of opening and closing mounting cylinder (13); Connecting seat cylinder (5), its bottom end is fixedly installed in the top end of opening and closing control pipe (3) by connecting pipe (4), and front surface is fixedly installed with controller (12);Fan mounting bracket (27) is fixedly installed in the inside of connecting seat cylinder (5), and exhaust fan (28) is fixedly installed in the inside of fan mounting bracket (27).

2. The gas collecting hood with automatic opening and closing function according to claim 1, characterized in that: The upper and lower of rotating ball (15) are respectively provided with lower bushing (14) and upper bushing (20), both are fixedly installed in the inside of opening and closing mounting cylinder (13).

3. The gas collecting hood with automatic opening and closing function according to claim 1, characterized in that: One side of opening and closing control pipe (3) is fixedly connected with positioning mounting cylinder (17), rotating control shaft (18) is rotatably installed in the inside of positioning mounting cylinder (17).

4. The gas collecting hood with automatic opening and closing function according to claim 3, characterized in that: One end of rotating control shaft (18) is fixedly connected with rotating ball (15), and the other end is fixedly installed with coupling (19).

5. The hood according to claim 1, wherein: One side of opening and closing control pipe (3) is provided with servo motor (9), and the output shaft of servo motor (9) is fixedly connected with coupling (19).

6. The hood according to claim 1, wherein: The top end of opening and closing mounting cylinder (13) is fixedly installed with multiple support vertical rods (21), and the top end of support vertical rod (21) is fixedly installed with multiple-arm mounting bracket (22).

7. The hood according to claim 6, characterized in that: Lifting mounting pipe (23) is slidably installed in the inside of multiple-arm mounting bracket (22), and lower concave sealing disc (24) is fixedly installed in the bottom end of lifting mounting pipe (23).

8. The hood according to claim 7, characterized in that: Upper concave floating disc (25) is fixedly sleeved on the top of the outer wall of lifting mounting pipe (23), and the top of upper concave floating disc (25) is provided with fixed compression ring (26).

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