Temperature-pressure-flow integrated waste gas measuring instrument

Abstract

The utility model discloses a temperature, pressure and flow integrated waste gas measuring instrument, which relates to the technical field of waste gas measurement and comprises a measuring component arranged on one side of a pipeline body, the measuring component comprises a flange mounting plate, and a mounting seat matched with the flange mounting plate is arranged on one side of the pipeline body. Impurities accumulated in the total-pressure measuring hole and the static-pressure measuring hole can be conveniently extracted out, interference on subsequent ventilation is avoided, the length of the pitot tube body extending into the pipeline body can be conveniently adjusted, and the problem that a traditional temperature-pressure-flow integrated waste gas measuring instrument cannot be used for measuring smoke and waste gas is solved. The problems that impurities blown out possibly leak out slowly due to the fact that the number of the impurities is large, the impurities are likely to be attached to an inlet of a gas pipe, the measurement accuracy is likely to be affected after the impurities are accumulated, the length of a pitot tube is difficult to adjust after the pitot tube is installed in a pipeline, and the use flexibility is poor when different smoke pipes are detected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust gas measurement, in particular to a temperature, pressure and flow integrated exhaust gas measuring instrument. Background Art

[0002] The temperature and pressure flow exhaust gas measuring instrument is a device used to measure pollutants in flue gas. In the fields of scientific research, production, environmental protection, tunnel and mine ventilation, it is used to measure the air flow velocity, pressure and temperature in ventilation ducts, industrial pipelines and furnace flues. During the measurement, the fluid must fill the entire pipeline and flow continuously in one direction.

[0003] When measuring smoke and exhaust gas, the existing temperature-pressure-flow integrated exhaust gas measuring instrument generally uses a recoil blowing pipe to clean the impurities in the Pitot tube in order to prevent the particulate matter in the flue gas from adsorbing the inside of the pipe. The cleaning effect is poor through a single blowing method. At the same time, the impurities blown out may leak out slowly due to the large number, and easily adhere to the entrance of the air pipe. After accumulation, it may affect the accuracy of the measurement. After the Pitot tube is installed in the pipe, it is difficult to adjust its length. When testing different smoke pipes, it may cause inaccurate measurement data and poor flexibility in use. Utility Model Content

[0004] The main purpose of the utility model is to provide a temperature, pressure and flow integrated exhaust gas measuring instrument, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A temperature-pressure-flow integrated exhaust gas measuring instrument comprises a measuring assembly arranged on one side of a pipe body, the measuring assembly comprises a flange mounting plate, and a mounting seat matching the flange mounting plate is arranged on one side of the pipe body;

[0007] The flange mounting plate is mounted on the front end of the mounting seat by mounting bolts, and a sensor information processing box is arranged at one side of the front end of the flange mounting plate, a pitot tube body is movably connected and installed through the front and rear ends of the flange mounting plate, and the pitot tube body extends into the pipeline body, a total pressure measuring hole is arranged at one side of the rear end of the pitot tube body, a static pressure measuring hole is arranged at the other side of the rear end of the pitot tube body, an electric telescopic rod is installed at the rear end of the top of the pitot tube body through the mounting plate, a movable plate is fixedly connected to the bottom end of the push rod of the electric telescopic rod, cleaning tubes matching the total pressure measuring hole and the static pressure measuring hole are respectively connected to the bottom end of the movable plate at both sides, and the opposite sides of the two cleaning tubes are fitted with the side away from the total pressure measuring hole and the static pressure measuring hole.

[0008] As a further solution of the utility model, a fixing plate is arranged around the outer ring of the Pitot tube body, and the fixing plate is fixedly connected to the front end of the flange mounting plate, and a locking bolt matching the Pitot tube body is arranged through the top of the fixing plate.

[0009] As a further solution of the utility model, the outer ring of the Pitot tube body is provided with an external thread, and a sealing block is threadedly connected to the front position of the outer ring of the Pitot tube body through the external thread, and a sealing rubber pad is provided between the sealing block and the fixed disk.

[0010] As a further solution of the utility model, a temperature and humidity detection probe is arranged at a rear position of the top end of the Pitot tube body, a limit plate is fixedly connected to a lower position of the rear end of the flange mounting plate, a sliding rod is fixedly connected to the bottom end of the Pitot tube body, an end of the sliding rod away from the Pitot tube body passes through the limit plate, and is slidably connected to the limit plate.

[0011] As a further solution of the utility model, an ash extraction pipe is connected to the upper position of the front and rear ends of the flange mounting plate, and one end of the ash extraction pipe extending into the pipeline body is connected to two corrugated hoses through a connecting head, and the ends of the two corrugated hoses away from the ash extraction pipe are respectively connected to the top ends of the two cleaning pipes.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a measuring component, which is connected to an external ash pump through an ash extraction pipe, so that impurities accumulated in the total pressure measuring hole and the static pressure measuring hole can be extracted to avoid sticking to the outer walls of the total pressure measuring hole and the static pressure measuring hole, thereby avoiding interference with subsequent ventilation. When no detection is performed, the total pressure measuring hole and the static pressure measuring hole are blocked by the cleaning pipe, so that a large amount of impurities can be prevented from entering the total pressure measuring hole and the static pressure measuring hole, thereby facilitating protection thereof.

[0014] By arranging a sealing block, a fixing plate, and a locking bolt in conjunction with the Pitot tube body, it is convenient to adjust the length of the Pitot tube body extending into the pipe body, and it is convenient to adjust the total pressure measuring hole and the static pressure measuring hole to a position aligned with the center point of the pipe body, thereby improving the accuracy of the measurement data, facilitating the detection of pipe bodies of different sizes, and improving applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a temperature, pressure and flow integrated exhaust gas measuring instrument of the utility model;

[0016] Figure 2 It is a schematic diagram of the connection between the pitot tube body and the flange mounting plate in the overall structure of a temperature, pressure and flow integrated exhaust gas measuring instrument of the utility model;

[0017] Figure 3 It is a schematic diagram of the connection between the total pressure measuring hole and the cleaning pipe in the overall structure of a temperature-pressure-flow integrated exhaust gas measuring instrument of the utility model.

[0018] In the figure: 1. Pipe body; 2. Measuring assembly; 3. Flange mounting plate; 4. Pitot tube body; 5. Temperature and humidity detection probe; 6. Fixing plate; 7. Locking bolt; 8. Sealing block; 9. Total pressure measuring hole; 10. Static pressure measuring hole; 11. Electric telescopic rod; 12. Movable plate; 13. Cleaning pipe; 14. Ash extraction pipe; 15. Connector; 16. Corrugated hose. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figure 1-3 As shown, a temperature-pressure-flow integrated exhaust gas measuring instrument comprises a measuring assembly 2 arranged at one side of a pipe body 1, the measuring assembly 2 comprises a flange mounting plate 3, and a mounting seat matching the flange mounting plate 3 is arranged at one side of the pipe body 1;

[0021] The flange mounting plate 3 is mounted on the front end of the mounting seat by mounting bolts, and a sensor information processing box is arranged at one side of the front end of the flange mounting plate 3, a pitot tube body 4 is movably connected and installed through the front and rear ends of the flange mounting plate 3, and the pitot tube body 4 extends into the pipeline body 1, a total pressure measuring hole 9 is arranged at one side of the rear end of the pitot tube body 4, and a static pressure measuring hole 10 is arranged at the other side of the rear end of the pitot tube body 4, an electric telescopic rod 11 is installed at the rear end of the top of the pitot tube body 4 through the mounting plate, and a movable plate 12 is fixedly connected to the bottom end of the push rod of the electric telescopic rod 11, and cleaning pipes 13 matching the total pressure measuring hole 9 and the static pressure measuring hole 10 are respectively connected to the bottom end of the movable plate 12 at both sides, and the opposite sides of the two cleaning pipes 13 are in contact with the side away from the total pressure measuring hole 9 and the static pressure measuring hole 10.

[0022] In this embodiment, a fixing plate 6 is provided around the outer ring of the Pitot tube body 4, and the fixing plate 6 is fixedly connected to the front end of the flange mounting plate 3. A locking bolt 7 matching the Pitot tube body 4 is provided through the top of the fixing plate 6. After loosening the locking bolt 7, the Pitot tube body 4 is pushed to slide on the flange mounting plate 3, so that the insertion length of the Pitot tube body 4 can be adjusted as needed, so as to facilitate the measurement of pipe bodies 1 of different sizes.

[0023] In this embodiment, the outer ring of the Pitot tube body 4 is provided with an external thread, and a sealing block 8 is threadedly connected to the front position of the outer ring of the Pitot tube body 4 through the external thread, and a sealing rubber gasket is arranged between the sealing block 8 and the fixed disk 6. The external thread is arranged to facilitate the sealing block 8 to be rotated on the Pitot tube body 4, thereby squeezing the sealing rubber gasket, facilitating the sealing of the fixed disk 6 and the Pitot tube body 4, and reducing the probability of gas leakage.

[0024] In this embodiment, a temperature and humidity detection probe 5 is arranged at the rear position of the top of the Pitot tube body 4, a limit plate is fixedly connected to the lower position of the rear end of the flange mounting plate 3, and a slide rod is fixedly connected to the bottom end of the Pitot tube body 4. The end of the slide rod away from the Pitot tube body 4 passes through the limit plate and is slidably connected to the limit plate. The slide rod and the limit plate are arranged to prevent the Pitot tube body 4 from being skewed during adjustment, thereby improving the adjustment stability.

[0025] In this embodiment, an ash extraction pipe 14 is connected to the upper position of the front and rear ends of the flange mounting plate 3. The end of the ash extraction pipe 14 extending into the pipe body 1 is connected to two corrugated hoses 16 via a connector 15, and the ends of the two corrugated hoses 16 away from the ash extraction pipe 14 are respectively connected to the top ends of the two cleaning pipes 13. By connecting the ash extraction pipe 14 to an external ash extraction pump and then starting the external ash extraction pump, the dust entering from the total pressure measuring hole 9 and the static pressure measuring hole 10 can be sucked out, which is convenient for cleaning and avoids adhesion caused by slow outflow of smoke and dust.

[0026] It should be noted that the utility model is a temperature-pressure-flow integrated exhaust gas measuring instrument. When in use, first, a flange seat that cooperates with the flange mounting plate 3 can be left at the pipe body 1 as needed. Since the various components such as the Pitot tube body 4 are installed on the flange mounting plate 3, the Pitot tube body 4 can be passed through the measuring port at the pipe body 1, and then the flange mounting plate 3 is fixed by tightening the bolts. When the smoke gas to be detected passes through the pipe body 1, the total pressure measuring hole 9, the static pressure measuring hole 10, and the temperature and humidity detection probe 5 are arranged on the Pitot tube body 4;

[0027] Therefore, when the gas flows through, the total pressure measuring hole 9 facing the incoming flow feels an air pressure, and the static pressure measuring hole 10 facing away from the incoming flow feels an air pressure. Then the detected total pressure and static pressure are transmitted to the sensor, and the sensor measures the difference, i.e., the dynamic pressure, and calculates the flow rate based on it. At the same time, the temperature and humidity detection probe 5 measures the flue gas temperature and humidity, thereby completing the process of detecting the temperature, pressure, and flow rate of the flue gas flowing through the pipe body 1;

[0028] When cleaning is required, the ash extraction pipe 14 can be connected to the external ash extraction pump in advance, and then the electric telescopic rod 11 can be started, and the push rod of the electric telescopic rod 11 is extended to push the movable plate 12 downward. When the push rod of the electric telescopic rod 11 is extended to the limit distance, the cleaning pipe 13 is aligned with the center point of the total pressure measuring hole 9 and the static pressure measuring hole 10, so that the cleaning pipe 13 plays a role of shielding the total pressure measuring hole 9 and the static pressure measuring hole 10. At the same time, the top of the cleaning pipe 13 is connected to the ash extraction pipe 14 through the corrugated hose 16 and the connector 15. After that, the external ash extraction pump can be started as needed to suck out the dust entering from the total pressure measuring hole 9 and the static pressure measuring hole 10, which is convenient for cleaning. When sucking ash, blowing can be performed through the existing technology to improve the cleaning effect.

[0029] At the same time, the dust blown out is sucked to the cleaning pipe 13 to prevent it from adhering to the outer walls of the total pressure measuring hole 9 and the static pressure measuring hole 10, thereby reducing interference with the detection, and the Pitot tube body 4 is slidably mounted on the flange mounting plate 3 and locked by the locking bolt 7. Therefore, during use, the locking bolt 7 can be loosened and then the Pitot tube body 4 can be pushed to slide on the flange mounting plate 3, so that the insertion length of the Pitot tube body 4 can be adjusted as needed, so as to facilitate the measurement of pipe bodies 1 of different sizes.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A temperature, pressure and flow integrated exhaust gas measuring instrument, characterized in that: It comprises a measuring assembly (2) arranged on one side of a pipeline body (1), the measuring assembly (2) comprising a flange mounting plate (3), and a mounting seat matching the flange mounting plate (3) is arranged on one side of the pipeline body (1); The flange mounting plate (3) is mounted on the front end of the mounting seat by means of mounting bolts, and a sensor information processing box is arranged at one side of the front end of the flange mounting plate (3), a pitot tube body (4) is movably connected and installed through the front and rear ends of the flange mounting plate (3), and the pitot tube body (4) extends into the pipeline body (1), a total pressure measuring hole (9) is arranged at one side of the rear end of the pitot tube body (4), and a static pressure measuring hole (10) is arranged at the other side of the rear end of the pitot tube body (4), an electric telescopic rod (11) is installed at the rear end of the top of the pitot tube body (4) through the mounting plate, a movable plate (12) is fixedly connected to the bottom end of the push rod of the electric telescopic rod (11), and cleaning pipes (13) matching the total pressure measuring hole (9) and the static pressure measuring hole (10) are respectively connected to the bottom end of the movable plate (12) at both sides, and the opposite sides of the two cleaning pipes (13) are in contact with the sides of the total pressure measuring hole (9) and the static pressure measuring hole (10) that are away from each other.

2. The temperature-pressure-flow integrated exhaust gas measuring instrument according to claim 1, characterized in that: A fixing plate (6) is arranged around the outer ring of the Pitot tube body (4), and the fixing plate (6) is fixedly connected to the front end of the flange mounting plate (3), and a locking bolt (7) matching the Pitot tube body (4) is arranged through the top end of the fixing plate (6).

3. The temperature-pressure-flow integrated exhaust gas measuring instrument according to claim 2, characterized in that: The outer ring of the Pitot tube body (4) is provided with an external thread, and a sealing block (8) is threadedly connected to the front position of the outer ring of the Pitot tube body (4) via the external thread, and a sealing rubber pad is provided between the sealing block (8) and the fixed plate (6).

4. The temperature-pressure-flow integrated exhaust gas measuring instrument according to claim 3, characterized in that: A temperature and humidity detection probe (5) is arranged at a rear position of the top end of the Pitot tube body (4); a limit plate is fixedly connected to a lower position of the rear end of the flange mounting plate (3); a slide rod is fixedly connected to the bottom end of the Pitot tube body (4); an end of the slide rod away from the Pitot tube body (4) passes through the limit plate and is slidably connected to the limit plate.

5. The temperature-pressure-flow integrated exhaust gas measuring instrument according to claim 1, characterized in that: An ash extraction pipe (14) is connected to the upper position of the front and rear ends of the flange mounting plate (3); one end of the ash extraction pipe (14) extending into the pipeline body (1) is connected to two corrugated hoses (16) via a connector (15); and the ends of the two corrugated hoses (16) away from the ash extraction pipe (14) are respectively connected to the top ends of the two cleaning pipes (13).

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