CN219084476U - A Sampling System for Dust Concentration Measuring Instrument - Google Patents

Abstract

The utility model discloses a sampling system of a dust concentration measuring instrument, which comprises: a sampling mechanism, a sampling rod and a detection block. The sampling mechanism includes a base and an oil-gas separator. A Venturi detector is installed on the inner side of the end plate at one end, and the top and side walls of the Venturi detector are respectively installed with a Venturi adapter and a jet pump connected to the Venturi detector, and the top of the base is located at the other end. The inner side of the end plate is installed with a turn-press end piece. The sampling system disclosed in the utility model can ensure the cleanliness of the sampling path in the equipment, avoid the situation that the sampled gas flow is affected by the dirty and blocked sampling path, and also avoid the dust in the gas to be detected being affected by moisture and adhering to the inlet. The situation in the sampling path improves the measurement accuracy and service life of the equipment. Moreover, the sampling path and the sampling path have less bends, and the disassembly is convenient, which is conducive to the later maintenance work.

Description

A Sampling System for Dust Concentration Measuring Instrument

technical field

The utility model relates to the technical field of dust concentration measuring instruments, in particular to a sampling system of a dust concentration measuring instrument.

Background technique

Dust concentration measurement is widely required in industrial production, such as: powder processing dust monitoring, coal combustion dust concentration measurement, etc. The dust concentration measuring instrument is a new type of monitor, which can continuously monitor the smoke and dust of pollution sources in harsh environments for a long time Emission status, and automatically save and upload data to the database to provide data support for subsequent analysis and research. Now this device has been widely used in the following fields, such as the measurement of smoke concentration in the industrial manufacturing process, smoke monitoring of powder production enterprises, and smoke emission from pollution sources Detection, scientific research, etc. Dust concentration measuring instrument is referred to as dust instrument, also known as particle detector, or smoke detector. It is mainly used in the continuous monitoring of various industrial waste gas particulate matter emission sources. Metallurgy, coking, oil refining, cement, thermal power, chemical industry, textile and other industries are used.

When the existing dust concentration measuring instrument is used in a harsh working environment, the measurement module and sampling pipeline in the sampling system of the dust concentration measuring instrument pass through particles such as moisture and smoke for a long time, which is difficult to clean and increases equipment maintenance costs. , Moreover, the equipment sampling pipeline and each measurement module will be blocked, corroded, polluted by particulate matter such as moisture and flue gas, which will reduce the measurement accuracy of the measuring instrument and affect the service life of the equipment. Therefore, those skilled in the art provide a sampling system of a dust concentration measuring instrument to solve the problems raised in the background art above.

Utility model content

The purpose of this utility model is to provide a sampling system of a dust concentration measuring instrument to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A sampling system for a dust concentration measuring instrument, comprising: a sampling mechanism, a sampling rod and a detection block. The sampling mechanism includes a base and an oil-gas separator. End plates are installed at both ends of the top of the base, and the top of the base is located at one end of the end plate. A Venturi detector is installed on the inside, the top and side walls of the Venturi detector are respectively installed with a Venturi adapter and a jet pump connected to the Venturi detector, and the top of the base is installed on the inner side of the end plate at the other end. Turning pressure end piece, the inside of the turning pressure end piece is provided with a curved air path, the curved air path is connected with the jet pump, and the outer side of the end plate close to the turning pressure end piece is provided with a laser seat with an internal gas path, the laser seat and the bending The gas circuit is connected, the oil-gas separator is arranged on one side of the laser seat and communicated with the laser seat, and the inlet end of the oil-air separator is connected to the output end of the external compressor;

The detection block is installed on the top of the base and is located between the Venturi detector and the rotary pressure end piece. The input and output ends of the detection block are equipped with sample tubes, and the other ends of the two sample tubes are respectively installed in the Venturi detector. The input end of the detector and the output end of the sampling rod, the middle position of the end plate close to the laser seat is provided with a window mounting piece for auxiliary detection block measurement, the other end of the window mounting piece penetrates through the turning end piece and is installed on the detection block On the bottom of the base, a heating plate is installed at the position corresponding to the detection block and the turning end piece.

Preferably, sampling tubes are installed between the oil-gas separator, laser seat, pressure-transfer end piece, and jet pump, and the compressed air enters the oil-gas separator, laser seat, pressure-turn end piece, and jet pump sequentially through the sampling tube. path.

Preferably, the path through which the gas to be measured sequentially enters the sampling rod, the detection block, the Venturi detector and the jet pump through the sampling tube is the sampling path.

Preferably, a heating rod is installed on one side of the sampling rod, the heating rod penetrates through the sampling rod and extends to its inner cavity, and the outer wall of the sampling rod is covered with a fixing flange for installing the sampling rod.

Preferably, an air chamber is opened inside the Venturi detector, and the input end of the jet pump is installed inside the air chamber.

Preferably, the outer wall of the Venturi adapter is provided with a static pressure output port and a dynamic pressure output port, and the other ends of the static pressure output port and the dynamic pressure output port are both connected to the main board of the measuring instrument through a hose.

Preferably, a connecting pipe is arranged between the bottom of the Venturi adapter and the Venturi detector, and both ends of the connecting pipe are installed in the inside of the Venturi adapter and the Venturi detector by threads, and the Venturi adapter It communicates with the air cavity through a connecting tube.

Compared with the prior art, the utility model has the advantages that: by setting the oil-gas separator, the pressure-returning end piece and the heating plate, the moisture, oil and gas and other particulate impurities in the sampling gas entering the equipment can be removed, and the equipment can be ensured. The sampling path is clean and tidy, avoiding the situation that the sampling gas flow is affected by the dirty and clogged sampling path, and, by setting the heating rod in the sampling rod, the moisture in the gas to be detected can be evaporated, and the moisture in the gas to be detected can be reduced. The water content prevents the dust in the gas to be tested from being affected by moisture and adheres to the sampling path, resulting in a reduction in the dust content in the gas to be tested, which improves the measurement accuracy and service life of the equipment, reduces maintenance costs, and , The sampling path and the sample injection path have less bends, and the disassembly is convenient, which is conducive to the later maintenance work.

Description of drawings

Fig. 1 is a schematic structural diagram of a sampling system according to an embodiment of the present invention;

Fig. 2 is a cross-sectional view of a pressure turning end piece according to an embodiment of the present invention;

Fig. 3 is a disassembled schematic diagram of a Venturi detector according to an embodiment of the present invention.

In the figure: 1, sampling mechanism; 101, sampling tube; 11, base; 12, end plate; 13, Venturi detector; 131, Venturi adapter; 132, air cavity; 133, connecting pipe; Pressure output port; 135. Dynamic pressure output port; 14. Jet pump; 15. Rotary pressure end piece; 151. Bending gas path; 16. Laser seat; 17. Window plate installation piece; 18. Heating plate; 2, sampling rod; 21, fixed flange; 22, heating rod; 3, detection block; 31, sampling tube.

Detailed ways

In describing the present invention, it should be understood that the terms "central", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying Any device or element must have a specific orientation, or be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more. Additionally, the term "comprise" and any variations thereof, are intended to cover a non-exclusive inclusion.

As shown in Figures 1 and 2, the sampling mechanism 1 includes a base 11 and an oil-gas separator 19. End plates 12 are installed on both ends of the top of the base 11, and a Venturi is installed on the inside of the end plate 12 at one end of the base 11. Detector 13, the top and side walls of Venturi detector 13 are respectively equipped with Venturi adapter 131 and jet pump 14 communicating with Venturi detector 13, and the top of base 11 is positioned at the inner side of end plate 12 at the other end A turning pressure end piece 15 is installed, and the inside of the turning pressure end piece 15 is provided with a curved air passage 151, which is connected with the jet pump 14. The laser seat 16 of the road, the laser seat 16 communicates with the curved air circuit 151, the oil-gas separator 19 is arranged on one side of the laser seat 16 and communicates with the laser seat 16, and the inlet end of the oil-gas separator 19 is connected to the external compressor connected to the output end of the oil-air separator 19, the laser seat 16, the pressure switch end piece 15, and the jet pump 14, and a sampling tube 101 is installed between the oil-gas separator 19, the laser seat 16, and the jet pump 14, and the compressed air enters the oil-gas separator 19, the laser seat 16, and the The path of the pressure turning end piece 15 and the jet pump 14 is a sampling path.

The detection block 3 is installed on the top of the base 11 and is positioned between the Venturi detector 13 and the pressure turning end piece 15. The input end and the output end of the detection block 3 are all provided with a sampling tube 31, and the other of the two sampling tubes 31 One end is respectively installed on the input end of the Venturi detector 13 and the output end of the sampling rod 2, and the gas to be measured enters the sampling rod 2, the detection block 3, the Venturi detector 13, and the jet pump 14 sequentially through the sampling tube 31. Injection path.

In one embodiment, when sampling, compressed air flows through the sampling tube 101 through the oil-gas separator 19, the laser seat 16, and the end piece 15, and then enters the jet pump 14, which can generate suction inside the jet pump 14, The jet pump 14 can sequentially guide the air flow in the air chamber 132, the sampling tube 31, the scattering chamber inside the detection block 3, and the inner cavity of the sampling rod 2 from its input end, so as to induce the gas to be detected outside the sampling rod 2 The measurement is carried out in the scattering chamber inside the detection block 3 to realize the sampling of the gas to be detected.

In one embodiment, when the compressed air enters the jet pump 14, the oil and particles in the compressed air are first filtered by the oil-air separator 19, and then the compressed air entering the end piece 15 is filtered by the heating plate 18. Heating and evaporating the moisture in the compressed air can ensure the cleanliness of the sampling path in the equipment, and avoid the situation that the sampling gas flow is affected by the dirty and blocked sampling path. Moreover, when the compressed air flows through the inside of the laser seat 16, The flow of compressed air can dissipate heat and cool down the laser seat 16. After the compressed air enters the turning end piece 15, the curved air path 151 increases the contact area between the compressed air and the turning end piece 15, increasing the The heating time of the compressed air is shortened, the heating of the compressed air is more uniform, and the filtering effect of the moisture in the compressed air is improved.

As shown in FIG. 1 , the middle position of the end plate 12 close to the laser seat 16 is provided with a window mounting piece 17 for assisting the measurement of the detection block 3 , and the other end of the window mounting piece 17 penetrates through the turning end piece 15 and is installed on the detection side. On the block 3, a heating plate 18 is installed at the position corresponding to the bottom of the base 11 and the detection block 3 and the pressure turning end piece 15, and a heating rod 22 is installed on one side of the sampling rod 2, and the heating rod 22 runs through the sampling rod 2 and extends to its The inner cavity, and the outer wall of the sampling rod 2 is covered with a fixing flange 21 for installing the sampling rod 2 .

In one embodiment, when the dust concentration in the gas is detected, the fixed flange 21 is first installed at the detection place by bolts, the installation of the sampling rod 2 is completed, and then the suction of the jet pump 14 is used to attract the gas to be tested into the sampling area. In the rod 2, at the same time, the inner cavity of the sampling rod 2 is heated by the heating rod 22, so that the moisture in the gas to be measured can be heated and evaporated, and the dust in the gas to be detected is prevented from being affected by the moisture and attached to the sample injection path. The dust content in the gas to be measured is reduced, which improves the measurement accuracy and service life of the equipment.

In one embodiment, after the gas to be detected enters the scattering chamber in the detection block 3, the laser on the laser seat 16 emits laser light and enters the scattering chamber through the lens on the window plate mounting part 17 to form a beam of light, which can be reflected The intensity of light is used to measure the concentration of dust. The more dust in the gas, the stronger the reflection of the laser on it, and the cleaner the air, the less the reflection.

As shown in FIG. 1 and FIG. 3 , an air chamber 132 is provided inside the Venturi detector 13, the input end of the jet pump 14 is installed inside the air chamber 132, and the outer wall of the Venturi adapter 131 is provided with a static pressure output The port 134 and the dynamic pressure output port 135, the other end of the static pressure output port 134 and the dynamic pressure output port 135 are all connected to the main board of the measuring instrument through a hose, between the bottom of the Venturi adapter 131 and the Venturi detector 13 A connecting pipe 133 is provided, and both ends of the connecting pipe 133 are installed inside the Venturi adapter 131 and the Venturi detector 13 through threads, and the Venturi adapter 131 communicates with the air cavity 132 through the connecting pipe 133 .

In one embodiment, after the dust content in the gas is detected, the detected gas entering the air cavity 132 first enters the Venturi adapter 131 through the connecting pipe 133 and flows from the static pressure output port 134 and the dynamic pressure output port 135 The hose at the place is discharged, so that the sensor on the main board of the device can detect the pressure, pressure difference, flow and other data of the gas in the hose.

The working principle of the utility model is: when in use, the compressed air flows through the oil-gas separator 19, the laser seat 16, and the end piece 15 through the sampling tube 101, and then enters the jet pump 14, which can generate suction inside the jet pump 14. , the jet pump 14 can sequentially guide the air flow in the air chamber 132, the sampling tube 31, the scattering chamber inside the detection block 3, and the inner cavity of the sampling rod 2 from its input end, so that the gas to be detected outside the sampling rod 2 Introduced into the scattering chamber inside the detection block 3 for measurement, realizing the sampling of the gas to be detected.

In addition, impurities such as oil and particles in the compressed air can be filtered through the oil-gas separator 19, and then the moisture in the compressed air in the sampling path and the moisture in the gas to be measured in the sampling path can be evaporated by heating, which can Ensure the cleanliness of the sampling path in the equipment, avoid the situation that the sample gas flow is affected by the dirty and clogged sampling path, and also avoid the dust in the gas to be tested being affected by moisture and attached to the sampling path, causing the gas to be tested The reduction of dust content occurs, which improves the measurement accuracy and service life of the equipment and reduces maintenance costs. Moreover, there are fewer bends in the sampling path and the sampling path, and the disassembly is convenient, which is conducive to the later maintenance work.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the technical solution of the utility model and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (7)

1. A sampling system of a dust concentration measuring instrument, comprising: a sampling mechanism (1), a sampling rod (2) and a detection block (3), characterized in that the sampling mechanism (1) comprises a base (11) and an oil-gas Separator (19), both ends of the top of the base (11) are equipped with end plates (12), and the top of the base (11) is located on the inside of the end plate (12) at one end. Venturi detection is installed device (13), the top and side walls of the Venturi detector (13) are respectively equipped with a Venturi adapter (131) and a jet pump (14) communicating with the Venturi detector (13), The top of the base (11) is located on the inner side of the end plate (12) at the other end, and a turning pressure end piece (15) is installed inside the turning pressure end piece (15), and a curved air path (151) is opened inside. , the curved air passage (151) communicates with the jet pump (14), and a laser seat ( 16), the laser seat (16) communicates with the curved air path (151), the oil-gas separator (19) is arranged on one side of the laser seat (16) and connected to the laser seat (16) ) are connected, and the inlet end of the oil-gas separator (19) is connected with the output end of the external compressor; The detection block (3) is installed on the top of the base (11) and is located between the Venturi detector (13) and the turning end piece (15), the input end of the detection block (3), The output ends are all provided with sampling tubes (31), and the other ends of the two described sampling tubes (31) are installed on the input end of the Venturi detector (13) and the output of the sampling rod (2) respectively. end, near the middle position of the end plate (12) of the laser seat (16) is provided with a window mounting piece (17) for assisting the measurement of the detection block (3), the window mounting piece (17 ) is installed on the detection block (3) through the said turning end piece (15), the bottom of the base (11) is connected with the detection block (3), turning pressure end piece (15) A heating plate (18) is installed at the corresponding position. 2. The sampling system of a dust concentration measuring instrument according to claim 1, characterized in that the oil-gas separator (19), the laser seat (16), the rotary pressure end piece (15), the jet pump (14 ) are equipped with sampling pipes (101), through which compressed air enters the oil-gas separator (19), laser seat (16), turning pressure end piece (15), jet pump ( 14) is a sampling path. 3. The sampling system of a dust concentration measuring instrument according to claim 1, wherein the gas to be measured enters the sampling rod (2) and the detection block (3) sequentially through the sampling tube (31) , the Venturi detector (13), and the path of the jet pump (14) are the sampling paths. 4. The sampling system of a dust concentration measuring instrument according to claim 1, wherein a heating rod (22) is installed on one side of the sampling rod (2), and the heating rod (22) runs through the The sampling rod (2) extends to its inner cavity, and the outer wall of the sampling rod (2) is covered with a fixing flange (21) for installing the sampling rod (2). 5. the sampling system of a kind of dust concentration measuring instrument according to claim 1, is characterized in that, the inside of described Venturi detector (13) offers air cavity (132), and the jet pump (14) The input end is installed inside the air cavity (132). 6. The sampling system of a kind of dust concentration measuring instrument according to claim 1, is characterized in that, the outer wall of described Venturi adapter (131) is provided with static pressure outlet (134) and dynamic pressure outlet ( 135), the other ends of the static pressure output port (134) and the dynamic pressure output port (135) are connected to the main board of the measuring instrument through flexible pipes. 7. The sampling system of a dust concentration measuring instrument according to claim 5, characterized in that a connection is provided between the bottom of the Venturi adapter (131) and the Venturi detector (13) pipe (133), the two ends of the connecting pipe (133) are installed in the inside of the Venturi adapter (131) and the Venturi detector (13) by threads, and the Venturi adapter (131 ) communicates with the air cavity (132) through the connecting pipe (133).

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