Device for detecting content of particulate matters in waste gas

Abstract

The utility model discloses a device for detecting the content of particulate matters in waste gas, which comprises a waste gas discharge pipe, a detection table is mounted on the waste gas discharge pipe, a sampling mechanism is mounted on the waste gas discharge pipe, and a detection mechanism is mounted on the detection table; the sampling mechanism comprises a sampling barrel, a first lifting piston, a driving frame, a sampling pipe and a first one-way valve; the detection mechanism comprises a weighing device, a water tank, a second one-way valve and an air guide pipe. The sampling device has the beneficial effects that the sampling pipe is opened only during sampling, so that particulate matters can be prevented from being accumulated in the sampling pipe, the accuracy of a detection result is ensured, waste gas and the particulate matters can be discharged into water when the sampling barrel discharges the waste gas, the particulate matters can be absorbed by the water, the gas can be discharged, the filter screen can be prevented from being blocked, and the detection efficiency is improved; particulate matters can be separated from water, so that the proportion of various substances in the waste gas can be conveniently judged, and the waste gas can be conveniently detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas detection equipment technical field more specifically, relate to a kind of particulate matter content detection device in waste gas. BACKGROUND

[0002] There are a large amount of harmful particulate matters in industrial waste gas, once these suspended matters are discharged into the air, they will have serious impact on the environment and personnel, and the treatment of waste gas needs to detect harmful substances in a certain amount of air to facilitate the determination of the particulate matter content of the current discharged waste gas.

[0003] In the prior art, when detecting the particulate matter content in waste gas, the waste gas is usually sampled through a sampling tube, and then the air is discharged to filter the particulate matter to determine the content of the particulate matter. However, there are some problems in use. The sampling tube is normally open. When sampling, the sampling tube needs to be placed in the waste gas, which can easily cause the accumulation of particulate matter in the sampling tube, affecting the detection result. When filtering the particulate matter, the filter screen is easily blocked, affecting the detection efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the above-mentioned problems and designs a particulate matter content detection device in waste gas.

[0005] To achieve the above-mentioned purpose, the utility model provides a particulate matter content detection device in waste gas, which comprises a waste gas discharge pipe, a detection table is installed on the waste gas discharge pipe, a sampling mechanism is installed on the waste gas discharge pipe, and a detection mechanism is installed on the detection table.

[0006] The sampling mechanism comprises a plurality of sampling cylinders installed on the waste gas discharge pipe, a first lifting piston is installed in the sampling cylinder, a driving frame is installed on the waste gas discharge pipe, the driving frame can drive the plurality of first lifting pistons to move up and down, a plurality of sampling tubes are installed in the waste gas discharge pipe, the sampling tubes are normally closed, and the sampling tubes are opened only when sampling, a first one-way valve is installed at the outlet end of the sampling tube, and the first one-way valve is connected with the inlet end of the sampling cylinder.

[0007] The detection mechanism comprises a plurality of weight meters installed on the detection table, a water tank is installed on the weight meter, water is placed in the water tank, a second one-way valve is installed on one side of the lower end of the sampling cylinder, a gas guide pipe is installed at the outlet end of the second one-way valve, and the outlet end of the gas guide pipe extends below the water surface.

[0008] Further, the driving frame comprises a lifting table located above the waste gas discharge pipe, the lifting table is connected with the waste gas discharge pipe through a plurality of electric telescopic rods, a plurality of connecting rods are installed at the lower end of the lifting table, and the connecting rods and the first lifting pistons are telescopically connected.

[0009] Further, the sampling pipe comprises a square pipe arranged in the exhaust emission pipe, the square pipe is arranged in the exhaust emission pipe through a fixing rod, a second lifting piston is arranged in the square pipe, a lifting rod is arranged on the upper end of the second lifting piston, an avoiding opening is arranged on the upper end of the square pipe, a plurality of round holes are arranged on the upper end of the exhaust emission pipe, the upper end of the lifting rod extends to the upper side of the exhaust emission pipe through the avoiding opening and the round holes, a sealing ring is arranged at the intersection of the round hole and the lifting rod, a lifting plate is arranged above the exhaust emission pipe, the lifting plate is fixedly connected with the lifting rod, the lifting plate is connected with the exhaust emission pipe through a plurality of extension springs, a plurality of pushing rods are arranged on the lower end of the lifting platform, the pushing rods can push the lifting plate downward, the first one-way valve is arranged on one side of the square pipe, and a plurality of air inlets are arranged on the lower end of the square pipe.

[0010] Further, a connecting hole is arranged on the upper end of the first lifting piston, the lower end of the connecting rod extends into the connecting hole, a circular ring baffle is arranged on the upper end of the connecting hole, and a limiting plate is arranged on the lower end of the connecting rod.

[0011] Further, a plurality of inclined partitions are arranged in the water tank, an exhaust opening is arranged on the higher side of the inclined partition, and the inclined directions of adjacent inclined partitions are opposite.

[0012] The beneficial effects of the utility model are as follows: the sampling pipe is opened only when sampling, thereby preventing particulate matters from accumulating in the sampling pipe and ensuring the accuracy of detection results; when the sampling cylinder discharges exhaust gas, the exhaust gas and particulate matters can be discharged into water, the water can absorb the particulate matters and discharge the gas, thereby preventing the filter screen from being blocked and improving detection efficiency; then the particulate matters can be separated from the water, the proportion of various substances in the exhaust gas can be judged, and the exhaust gas can be detected conveniently;

[0013] Through the up-down movement of the lifting platform, the second lifting piston can be driven to move up and down, thereby conveniently opening and closing the square pipe;

[0014] Through arranging a plurality of inclined partitions in the water tank, the retention time of the exhaust gas in the water tank can be prolonged, thereby preventing the particulate matters from running out with the exhaust gas. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the particulate matter content detection device in exhaust gas according to the utility model;

[0016] Figure 2 It is Figure 1 It is a local enlarged view of A in the figure;

[0017] Figure 3 It is a connecting relationship schematic view of the connecting rod and the first lifting piston according to the utility model;

[0018] Figure 4 is the connection relationship schematic view of the sampling cylinder and the sampling pipe of the utility model;

[0019] In the figure, 1, exhaust emission pipe;2, detection table;3, sampling cylinder;4, first lifting piston;5, driving frame;6, sampling pipe;7, first check valve;8, weighing device;9, water tank;10, second check valve;11, gas guide pipe;12, lifting table;13, electric telescopic rod;14, connecting rod;15, square pipe;16, fixed rod;17, second lifting piston;18, lifting rod;19, avoiding port;20, round hole;21, sealing ring;22, lifting plate;23, telescopic spring;24, push rod;25, air inlet;26, connecting hole;27, circular ring baffle;28, limiting plate;29, inclined partition;30, exhaust port. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely explained below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms ''length'', ''width'', ''upper'', ''lower'', ''front'', ''rear'', ''left'', ''right'', ''vertical'', ''horizontal'', ''top'', ''bottom'', ''inner'', ''outer'' and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, in the description of the utility model, the meaning of ''a plurality of'' is two or more than two, unless otherwise explicitly and specifically limited.

[0022] The utility model provides Figures 1-4The device for detecting the content of particulate matter in exhaust gas includes an exhaust emission pipe 1, a detection table 2 installed on the exhaust emission pipe 1, a sampling mechanism installed on the exhaust emission pipe 1, and a detection mechanism installed on the detection table 2. The sampling mechanism includes a plurality of sampling cylinders 3 installed on the exhaust emission pipe 1, a first lifting piston 4 installed in each sampling cylinder 3, a driving frame 5 installed on the exhaust emission pipe 1, and a plurality of sampling tubes 6 installed in the exhaust emission pipe 1. The sampling tubes 6 are normally closed and are opened only during sampling. A first one-way valve 7 is installed at the outlet end of each sampling tube 6 and is connected to the inlet end of the corresponding sampling cylinder 3. The detection mechanism includes a plurality of weight meters 8 installed on the detection table 2, and a water tank 9 installed on each weight meter 8. Water is placed in the water tank 9. A second one-way valve 10 is installed on one side of the lower end of each sampling cylinder 3. A gas guide pipe 11 is installed at the outlet end of the second one-way valve 10 and extends below the water surface.

[0023] The device detects the content of particulate matter in exhaust gas as follows. Normally, the sampling tubes 6 are closed. When sampling is needed, the sampling tubes 6 are opened. The driving frame 5 drives the first lifting pistons 4 to move upward, and then, under the action of negative pressure, the exhaust gas in the exhaust emission pipe 1 enters the sampling cylinders 3 through the sampling tubes 6 and the first one-way valves 7. Then, the driving frame 5 drives the first lifting pistons 4 to move downward, and the exhaust gas in the sampling cylinders 3 is discharged. Since the first one-way valves 7 block the discharge of exhaust gas, the exhaust gas enters the water tank 9 through the second one-way valves 10 and the gas guide pipes 11. The particulate matter in the exhaust gas is absorbed by water and sinks to the bottom, and the air is discharged. The weight change of the water tank 9 is detected by the weight meters 8, the weight of the particulate matter is obtained, and the content of the particulate matter is obtained by calculating the volume of the exhaust gas extracted by the sampling cylinders 3. To ensure the accuracy of the results, multiple sampling detections can be performed. After the detection is completed, the particulate matter in the water tank 9 is separated from the water, and the weights and proportions of various substances are detected, which facilitates targeted treatment of the exhaust gas.

[0024] The drawings attached to the specification Figure 1 and the specification Figure 3 The driving frame 5 includes a lifting table 12 located above the exhaust emission pipe 1. The lifting table 12 is connected to the exhaust emission pipe 1 by a plurality of electric telescopic rods 13. A plurality of connecting rods 14 are installed at the lower end of the lifting table 12. The connecting rods 14 are telescopically connected to the first lifting pistons 4.

[0025] The driving frame 5 drives the first lifting piston 4 to move up and down as follows: start the electric telescopic rod 13 to extend, the electric telescopic rod 13 can push the lifting platform 12 upwards, and through the connecting rod 14, the first lifting piston 4 can be driven to move upwards, start the electric telescopic rod 13 to shorten, the electric telescopic rod 13 can pull the lifting platform 12 downwards, and through the connecting rod 14, the first lifting piston 4 can be driven to move downwards, the connecting rod 14 and the first lifting piston 4 are telescopic, which can facilitate opening the sampling tube 6 before sampling.

[0026] Referring to the drawings accompanying the specification Figure 1 and the drawings accompanying the specification Figure 2 The sampling tube 6 includes a square tube 15 located in the exhaust pipe 1, the square tube 15 is installed in the exhaust pipe 1 through the fixed rod 16, the second lifting piston 17 is arranged in the square tube 15, the lifting rod 18 is arranged at the upper end of the second lifting piston 17, the square tube 15 is provided with an avoiding hole 19 at the upper end, the exhaust pipe 1 is provided with a plurality of round holes 20 at the upper end, the lifting rod 18 extends to the upper side of the exhaust pipe 1 through the avoiding hole 19 and the round hole 20, the sealing ring 21 is arranged at the intersection of the round hole 20 and the lifting rod 18, the lifting plate 22 is arranged above the exhaust pipe 1, the lifting plate 22 is fixedly connected with the lifting rod 18, the lifting plate 22 and the exhaust pipe 1 are connected through a plurality of telescopic springs 23, the lifting platform 12 is provided with a plurality of push rods 24 at the lower end, the push rods 24 can push the lifting plate 22 downwards, the first one-way valve 7 is arranged on one side of the square tube 15, and the square tube 15 is provided with a plurality of air inlets 25 at the lower end.

[0027] The sampling process of the sampling tube 6 is as follows: under normal circumstances, the lifting platform 12 is located at the lowermost position, the lifting plate 22 can be pushed downwards through the push rod 24, the telescopic spring 23 is compressed, the lifting plate 22 can push the second lifting piston 17 into the square tube 15 through the lifting rod 18, at this time, the sampling tube 6 is in a closed state, when sampling is needed, the lifting platform 12 is pushed upwards, and the connecting rod 14 is moved upwards, at this time, the connecting rod 14 will not pull the first lifting piston 4 upwards, when the lifting platform 12 moves upwards, the push rod 24 can also be pulled upwards, then the lifting plate 22, the lifting rod 18 and the second lifting piston 17 can be pulled upwards under the elastic force of the telescopic spring 23, thereby the air inlet 25 can be opened to facilitate air intake, after the sampling tube 6 is opened, the connecting rod 14 can pull the first lifting piston 4 upwards, thereby facilitating sampling, after sampling is completed, the lifting platform 12 is pushed downwards, the gas in the sampling cylinder 3 can be discharged, and when the lifting platform 12 moves to the lowermost position, the lifting plate 22 can be pushed downwards through the push rod 24, the second lifting piston 17 can be pushed downwards through the lifting rod 18, and the air inlet 25 can be closed.

[0028] Referring to the drawings accompanying the specification Figure 3The first lifting piston 4 is provided with a connecting hole 26 at the upper end, the connecting rod 14 extends into the connecting hole 26, a circular baffle 27 is installed at the upper end in the connecting hole 26, and a limiting plate 28 is installed at the lower end of the connecting rod 14. In normal state, the limiting plate 28 at the lower end of the connecting rod 14 is located in the lower end of the connecting hole 26. When the connecting rod 14 starts to move upward, the limiting plate 28 is driven to move upward. When the limiting plate 28 contacts with the circular baffle 27, the circular baffle 27 and the first lifting piston 4 can be pulled upward.

[0029] The utility model is illustrated in detail with reference to the accompanying drawings Figure 1 A plurality of inclined partitions 29 are installed in the water tank 9. The higher side of the inclined partition 29 is provided with an exhaust port 30. The inclined directions of adjacent inclined partitions 29 are opposite. The inclined partitions 29 can prolong the flow time of the exhaust gas in the water tank. The exhaust port 30 can facilitate the exhaust of air.

[0030] Although the utility model is illustrated in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. The modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A device for detecting particulate matter content in exhaust gas, comprising an exhaust gas discharge pipe (1), wherein a detection platform (2) is installed on the exhaust gas discharge pipe (1), characterized in that, A sampling mechanism is installed on the exhaust pipe (1), and a testing mechanism is installed on the testing platform (2); The sampling mechanism includes multiple sampling cylinders (3) installed on the exhaust pipe (1). A first lifting piston (4) is installed inside the sampling cylinder (3). A drive frame (5) is installed on the exhaust pipe (1). The drive frame (5) can drive the multiple first lifting pistons (4) to move up and down. Multiple sampling tubes (6) are installed inside the exhaust pipe (1). The sampling tubes (6) are normally closed and are only opened when sampling. A first one-way valve (7) is installed at the outlet end of the sampling tube (6). The first one-way valve (7) is connected to the inlet end of the sampling cylinder (3). The testing mechanism includes multiple weighing devices (8) installed on the testing platform (2), a water tank (9) is installed on the weighing device (8), water is placed in the water tank (9), a second one-way valve (10) is installed on one side of the lower end of the sampling tube (3), and a gas guide pipe (11) is installed at the outlet end of the second one-way valve (10), with the outlet end of the gas guide pipe (11) extending below the water surface.

2. The device for detecting particulate matter content in exhaust gas according to claim 1, characterized in that, The drive frame (5) includes a lifting platform (12) located above the exhaust pipe (1). The lifting platform (12) is connected to the exhaust pipe (1) via multiple electric telescopic rods (13). Multiple connecting rods (14) are installed at the lower end of the lifting platform (12). The connecting rods (14) are telescopically connected to the first lifting piston (4).

3. The device for detecting particulate matter content in exhaust gas according to claim 2, characterized in that, The sampling tube (6) includes a square tube (15) located inside the exhaust gas discharge pipe (1). The square tube (15) is installed inside the exhaust gas discharge pipe (1) by a fixing rod (16). A second lifting piston (17) is provided inside the square tube (15). A lifting rod (18) is installed on the upper end of the second lifting piston (17). An avoidance opening (19) is opened on the upper end of the square tube (15). A plurality of round holes (20) are opened on the upper end of the exhaust gas discharge pipe (1). The upper end of the lifting rod (18) passes through the avoidance opening (19) and the round holes (20) and extends above the exhaust gas discharge pipe (1). The round holes ( A sealing ring (21) is installed at the intersection of the lifting rod (18) and the lifting plate (22) above the exhaust pipe (1). The lifting plate (22) and the lifting rod (18) are fixedly connected. The lifting plate (22) and the exhaust pipe (1) are connected by multiple telescopic springs (23). Multiple push rods (24) are installed at the lower end of the lifting platform (12). The push rods (24) can push the lifting plate (22) downward. The first one-way valve (7) is installed on one side of the square tube (15). Multiple air inlets (25) are opened at the lower end of the square tube (15).

4. The device for detecting particulate matter content in exhaust gas according to claim 3, characterized in that, The first lifting piston (4) has a connecting hole (26) at its upper end. The lower end of the connecting rod (14) extends into the connecting hole (26). A circular baffle (27) is installed at the upper end of the connecting hole (26). A limit plate (28) is installed at the lower end of the connecting rod (14).

5. The device for detecting particulate matter content in exhaust gas according to claim 1, characterized in that, The water tank (9) is equipped with multiple inclined baffles (29), and the higher side of the inclined baffles (29) has an exhaust port (30). The adjacent inclined baffles (29) are inclined in opposite directions.

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