Telescopic pollutant sampling device

Abstract

The utility model discloses a telescopic pollutant sampling device, which relates to the technical field of gaseous pollutant sampling, is used for being vertically inserted into a flue through a measuring hole to sample flue gas in the flue and inputting the flue gas into a flue gas analyzer, and comprises a plugging assembly, a flue gas collecting pipeline and a telescopic reinforcing pipeline, the plugging assembly is used for preventing flue gas from escaping when the sampling device is inserted into the flue; the flue gas collecting pipeline movably penetrates through the center of the plugging piece, a flue gas inlet is formed in the end, located in the flue, of the flue gas collecting pipeline, the flue gas inlet faces the direction perpendicular to the extending direction of the flue gas collecting pipeline, and the end, deviating from the flue gas inlet, of the flue gas collecting pipeline is used for being connected with a flue gas analyzer; the telescopic reinforcing pipeline is arranged on the periphery of the flue gas collecting pipeline in a sleeving mode, can stretch out and draw back along with movement of the flue gas collecting pipeline and is used for reinforcing the flue gas collecting pipeline to prevent the flue gas collecting pipeline from being bent during flue gas collection. By means of the arrangement, smoke leakage can be avoided when the sampling device samples smoke in the flue.

Description

Technical Field

[0001] The utility model relates to the technical field of gaseous pollutant sampling, in particular to a telescopic pollutant sampling device. Background Art

[0002] The concentration distribution of sulfur dioxide and nitrogen oxide pollutants emitted from the tail flue of thermal power plants is uneven, and the measurement value at a certain point cannot represent the test value of the total measurement section. In addition, the sampling device for sampling gaseous pollutants in the exhaust gas of fixed pollution sources used in the current comparison test still has the function of single-point measurement, which is not accurate enough. Other patents such as (CN117491682A) provide a multi-point sampling device flowmeter for flue gas velocity measurement, but do not emphasize the blocking function, and flue gas leakage can easily affect the measurement accuracy; Patent (CN117192148A) involves a pipeline cross-section gas velocity and concentration test system, including n probe rod test devices symmetrically inserted into the flue, and each probe rod test device is evenly distributed with m test points along the depth direction of the pipeline cross section, but there are many probe rod devices, and the blocking function is not clear, which can easily cause flue gas leakage, and it is not clear to perform accurate measurements based on the grid method according to the flue.

[0003] Therefore, how to provide a sampling device that can prevent smoke leakage when the sampling device is sampling smoke in the flue is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0004] The utility model aims to provide a sampling device which can prevent the smoke from leaking when sampling the smoke in the smoke duct.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A retractable pollutant sampling device, used for vertically inserting into a flue through a measuring hole to sample the flue gas therein and inputting the sample into a flue gas analyzer, comprising:

[0007] A plugging assembly, used to prevent smoke from escaping when the sampling device is inserted into the flue;

[0008] The smoke collection pipe is movably arranged in the center of the plugging component. The end of the smoke collection pipe located in the flue is provided with a smoke inlet, the smoke inlet is oriented perpendicular to the extension direction of the smoke collection pipe, and the end of the smoke collection pipe away from the smoke inlet is used to connect the smoke analyzer;

[0009] The telescopic reinforcement pipe is sleeved on the outer circumference of the smoke collection pipe and can be telescoped along with the movement of the smoke collection pipe. It is used to reinforce the smoke collection pipe to prevent it from bending when collecting smoke.

[0010] Preferably, the plugging assembly includes: a first plugging member and a second plugging member. Both the first plugging member and the second plugging member are cylindrical structures. The diameter of the second plugging member is smaller than that of the first plugging member. The axes of the first plugging member and the second plugging member coincide, and the second plugging member is attached to the side of the first plugging member facing away from the telescopic reinforcement pipe.

[0011] Preferably, there are two flue gas collection pipes, and the two flue gas collection pipes are arranged in parallel and axially parallel, and the flue gas inlets of the two flue gas collection pipes face away from each other.

[0012] Preferably, a return piece is fixedly installed on the flue gas collection pipe. The return piece is connected to the end of the telescopic reinforcement pipe close to the flue gas inlet, and is used to drive the telescopic reinforcement pipe to expand and contract when the flue gas collection pipe moves.

[0013] Preferably, a scale is provided on the flue gas collection pipe, and the scale is used to judge the length of the extension of the flue gas collection pipe.

[0014] Preferably, the minimum unit of the scale is millimeters.

[0015] Preferably, the plugging assembly is specifically made of rubber.

[0016] Preferably, the materials of the flue gas collection pipe and the telescopic reinforcement pipe are specifically stainless steel.

[0017] Preferably, a rotary motor is arranged on the first plugging member. The movable end of the rotary motor is connected with a ball screw. The ball screw passes through the return piece, and a screw nut is fixedly arranged on the return piece at the position corresponding to the ball screw. A switch button for controlling the rotation of the rotary motor is arranged at the end of the flue gas collection pipe facing away from the flue gas inlet.

[0018] Preferably, a flue gas sensor and an alarm are arranged on the second plugging member. The flue gas sensor and the alarm are electrically connected. The flue gas sensor is used to detect whether there is escaping flue gas, and transmits a signal to the alarm when it detects flue gas.

[0019] Compared with the above background technology, a telescopic pollutant sampling device provided by the present invention is used to vertically insert into the flue through a measuring hole to sample the flue gas therein and input it into a flue gas analyzer. The sampling device includes: a plugging assembly, a flue gas collection pipe and a telescopic reinforcement pipe; the plugging assembly is used to prevent flue gas from escaping when the sampling device is inserted into the flue; the flue gas collection pipe is movably arranged through the center of the plugging member. The end of the flue gas collection pipe located in the flue is provided with a flue gas inlet, and the flue gas inlet faces perpendicular to the extension direction of the flue gas collection pipe. The end of the flue gas collection pipe facing away from the flue gas inlet is used to connect to a flue gas analyzer; the telescopic reinforcement pipe is sleeved on the outer periphery of the flue gas collection pipe and can expand and contract with the movement of the flue gas collection pipe, and is used to reinforce the flue gas collection pipe to prevent it from bending when collecting flue gas.

[0020] Specifically, when it is necessary to detect the flue gas in the flue, the sampling device can be vertically inserted into the measuring hole of the flue, and the side hole can be sealed by the sealing component to prevent the flue gas from escaping during the detection of the flue gas. Then, the flue gas collection pipe can be moved to different test points in the flue, that is, by changing the length of the flue gas collection pipe extending into the flue to change different test points in the flue until the detection of multiple measuring points on a straight line is completed. Then, the sampling device can be pulled out, moved a short distance along the length extension direction of the flue, and then the above operation can be repeated. In this way, it is very convenient and fast to accurately detect the flue gas by the grid method for the flue. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0022] Figure 1 Structural schematic diagram of the retractable pollutant sampling device provided by the embodiment of the present invention;

[0023] Figure 2 Installation structural schematic diagram of the retractable pollutant sampling device provided by the embodiment of the present invention;

[0024] Figure 3 Principle schematic diagram of using the grid method to detect the flue gas in the flue by the sampling device provided by the embodiment of the present invention.

[0025] Wherein:

[0026] 01 - Flue, 02 - Measuring hole, 03 - Measuring point;

[0027] 110 - First sealing member, 120 - Second sealing member;

[0028] 200 - Flue gas collection pipe, 210 - Flue gas inlet;

[0029] 300 - Telescopic reinforcement pipe, 310 - Retracting piece;

[0030] 410 - Rotating motor, 420 - Ball screw, 430 - Screw nut, 440 - Switch button;

[0031] 500 - Flue gas sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] In the description of the present invention, it should be understood that the terms "up", "down", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0035] The utility model aims to provide a sampling device which can prevent the smoke from leaking when sampling the smoke in the smoke duct.

[0036] It should be noted that, in this embodiment, the direction of the arrow in the accompanying drawings is the direction of smoke movement.

[0037] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0038] See also Figures 1 to 3 The present embodiment provides a retractable pollutant sampling device, which is used to be vertically inserted into the flue 01 to sample the flue gas inside it and pass the sample flue gas into the externally connected flue gas analyzer, wherein evenly arranged measuring holes 02 are provided on the two side walls of the flue 01. When testing, it is only necessary to insert the sampling device into the measuring holes 02. It should be noted that the measuring holes 02 are in a closed state when not in use.

[0039] The sampling device includes: a blocking component, a smoke collection pipe 200 and a telescopic reinforcement pipe 300; the blocking component is used to prevent smoke from escaping when the sampling device is inserted into the flue 01; the smoke collection pipe 200 is movably arranged in the center of the blocking component, and the end of the smoke collection pipe 200 located in the flue 01 is provided with a smoke inlet 210, the smoke inlet 210 is perpendicular to the extension direction of the smoke collection pipe 200, and the end of the smoke collection pipe 200 away from the smoke inlet 210 is used to connect the smoke analyzer; the telescopic reinforcement pipe 300 is sleeved on the outer periphery of the smoke collection pipe 200, and can be retracted and retracted with the movement of the smoke collection pipe 200, and is used to reinforce the smoke collection pipe 200 to prevent it from bending when collecting smoke.

[0040] Specifically, when the sampling device is inserted into the measuring hole 02 of the flue 01, the plugging assembly can exactly seal the measuring hole 02, and the flue gas collection pipe 200 for flue gas sampling can move at the center of the plugging assembly. As Figure 2 shown, in this embodiment, the flue 01 is vertically arranged, and the collection device is horizontally inserted into the measuring hole 02. In this way, by moving the horizontally moving flue gas collection pipe 200, the flue gas inlet 210 can be located at different measuring points 03, specifically as Figure 3 shown. In this way, accurate measurement of the flue gas in the flue 01 by the grid method can be achieved. It should be noted that, in order to improve the detection efficiency and the accuracy of the detection results, multiple collection devices can be prepared and inserted into the measuring holes 02 at different heights to simultaneously detect multiple measuring points 03.

[0041] It can be understood that when the length of the flue gas collection pipe 200 extending into the flue 01 is too long, the flue gas collection pipe 200 will bend under the action of gravity. In this way, the position of the measuring point 03 will change, and the distribution of the measuring points 03 as Figure 3 shown cannot be achieved. Therefore, in this embodiment, a telescopic reinforcement pipe 300 is sleeved on the outer periphery of the flue gas collection pipe 200. The telescopic reinforcement pipe 300 can be telescoped as the flue gas collection pipe 200 moves, so that the flue gas inlet 210 can be stably sent to the expected measuring point 03 without deviation, which can improve the accuracy of flue gas detection.

[0042] In addition, the telescopic reinforcement pipe 300 in this embodiment is a multi-section pipe that can be telescoped. The length and the number of sections of each section can be set according to the length that the actual flue gas inlet 210 needs to extend, and no specific limitation is made herein.

[0043] That is to say, when it is necessary to detect the flue gas in the flue 01, the sampling device can be vertically inserted into the measuring hole 02 of the flue 01, and the side hole is sealed by the plugging assembly to prevent the flue gas from escaping during the flue gas detection. Then, the flue gas collection pipe 200 can be moved to different test points in the flue 01, that is, by changing the length of the flue gas collection pipe 200 extending into the flue 01 to change different test positions in the flue 01 until the detection of multiple measuring points 03 on a straight line is completed. Then, the sampling device can be pulled out, moved along the length extension direction of the flue 01 and inserted into another measuring hole 02, and then the above operation is repeated. In this way, accurate detection of the flue gas in the flue 01 by the grid method can be conveniently and quickly achieved.

[0044] In this embodiment, the plugging assembly includes: a first plugging member 110 and a second plugging member 120. Of course, the two can be an integral structure or a split structure, and can be specifically set according to the actual situation; specifically as Figure 1As shown, the first blocking piece 110 and the second blocking piece 120 in this embodiment are both cylindrical structures, the diameter of the second blocking piece 120 is smaller than that of the first blocking piece 110, the axes of the first blocking piece 110 and the second blocking piece 120 coincide, and the second blocking piece 120 is attached to the side of the first blocking piece 110 that is away from the telescopic reinforcement pipe 300, that is, the two together form a stepped shaft structure; wherein, the first blocking piece 110 is mainly used to prevent the smoke in the flue 01 from leaking out from the gap between the measuring hole 02 and the collection device, and the second blocking piece 120 is used to prevent the smoke in the flue 01 from leaking out from the gap between the first blocking piece 110 and the smoke collection pipe 200, and the coordinated use of the first blocking piece 110 and the second blocking piece 120 greatly improves the sealing performance of the collection device during sampling.

[0045] like Figure 1 As shown, in order to improve the efficiency of smoke collection, two smoke collection pipes 200 are provided, and the two smoke collection pipes 200 are welded together in parallel. The two smoke collection pipes 200 are axially parallel. It should be noted that the smoke inlets 210 of the two smoke collection pipes 200 are oriented away from each other. Such an arrangement can adapt to the detection of smoke moving in different directions, that is, no matter the smoke moves from top to bottom or from bottom to top along the flue 01, it can be ensured that there is a smoke inlet 210 that can easily collect samples, and the other smoke inlet 210 serves as a supplement.

[0046] In some embodiments, a return plate 310 is fixedly installed on the smoke collection pipe 200, and the return plate 310 is perpendicular to the length extension direction of the smoke collection pipe 200. The return plate 310 is connected to the end of the telescopic reinforcement pipe 300 near the smoke inlet 210. Figure 1 As shown, in this way, when the smoke collection pipe 200 moves, it will drive the telescopic reinforcement pipe 300 to extend or retract, so that there is no need to select the corresponding length of the telescopic reinforcement pipe 300 every time during detection. In addition, this arrangement allows the smoke inlet 210 to be moved to a different measuring point 03 by only pulling the smoke collection pipe 200 when the sampling device is inserted into the measuring hole 02 for sampling, without having to replace reinforcement pipes of different lengths after each measurement point 03 is detected. This greatly improves the convenience of using the sampling device.

[0047] It can be understood that in order to intuitively determine whether the smoke inlet 210 extends into the expected measuring point 03 position, a scale is provided on the smoke collection pipe 200 in this embodiment, and the scale gradually expands from left to right, with the zero scale at the smoke inlet 210.

[0048] Furthermore, in order to precisely control the position of the smoke inlet 210 so that it can accurately extend into the expected measuring point 03, the minimum unit of the scale is set to millimeters.

[0049] It is understandable that the plugging component needs to be directly inserted into the measuring hole 02, and the smoke collection pipe 200 preferably moves in its center, so the plugging component needs to have a certain elasticity and wear resistance, and must also be able to withstand the temperature of the smoke, so the plugging component of this embodiment is preferably made of rubber.

[0050] It can be understood that the material of the smoke collection pipe 200 and the telescopic reinforcement pipe 300 is preferably stainless steel, which can increase the overall strength of the smoke collection pipe 200 and the telescopic reinforcement pipe 300, make the sampling device less likely to deform during use, and improve the accuracy of the smoke test in the flue 01.

[0051] In some embodiments, a rotating motor 410 is horizontally arranged on the first plug, and a ball screw 420 is connected to the movable end on the right side of the rotating motor 410. The ball screw 420 and the smoke collection pipe 200 are parallel to each other, and the ball screw 420 passes through the return pull plate 310. A screw nut 430 is arranged on the return pull plate 310 at a position corresponding to the position through which the ball screw 420 passes. In this way, when the rotating motor 410 is started, the ball screw 420 is driven to rotate. Due to the setting of the screw nut 430, the return pull plate 310 will move horizontally left and right, thereby realizing automatic extension and retraction of the smoke collection pipe 200 and the telescopic reinforcement pipe 300; in addition, a switch button 440 that can control the rotation of the rotating motor 410 is also arranged at the end of the smoke collection pipe 200 away from the smoke inlet 210, that is, the right end of the smoke collection pipe 200. This setting makes it convenient for the operator to control the rotating motor 410.

[0052] Furthermore, a smoke sensor 500 and an alarm are also provided on the second blocking member 120. The smoke sensor 500 and the alarm are electrically connected. The smoke sensor 500 can detect whether there is smoke escaping. When the sampling device is used normally, the smoke sensor 500 will transmit a signal to the alarm when it detects smoke, and the alarm will sound an alarm to remind the operator to make adjustments. This arrangement improves the safety of the use of the sampling device.

[0053] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] The above has introduced the embodiments provided by the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A retractable pollutant sampling device, used to vertically insert into a flue (01) through a measuring hole (02) to sample the flue gas therein and input the sample into a flue gas analyzer, characterized in that: include: A blocking component, used to prevent the smoke from escaping when the sampling device is inserted into the smoke duct (01); A smoke collection pipe (200) is movably arranged in the center of the blocking component, and a smoke inlet (210) is provided at the end of the smoke collection pipe (200) located in the flue (01), the smoke inlet (210) is oriented perpendicular to the extension direction of the smoke collection pipe (200), and the end of the smoke collection pipe (200) away from the smoke inlet (210) is used for connecting to the smoke analyzer; The telescopic reinforcement pipe (300) is sleeved on the outer circumference of the smoke collection pipe (200) and can be telescoped along with the movement of the smoke collection pipe (200), and is used to reinforce the smoke collection pipe (200) to prevent it from bending when collecting the smoke.

2. The retractable pollutant sampling device according to claim 1, characterized in that: The plugging assembly comprises: a first plugging piece (110) and a second plugging piece (120); the first plugging piece (110) and the second plugging piece (120) are both cylindrical structures; the diameter of the second plugging piece (120) is smaller than that of the first plugging piece (110); the axes of the first plugging piece (110) and the second plugging piece (120) coincide with each other; and the second plugging piece (120) is attached to a side of the first plugging piece (110) that is away from the telescopic reinforced pipe (300).

3. The retractable pollutant sampling device according to claim 1, characterized in that: Two smoke collection pipes (200) are provided, and the two smoke collection pipes (200) are arranged in parallel and axially parallel, and the smoke inlets (210) of the two smoke collection pipes (200) face away from each other.

4. The retractable pollutant sampling device according to claim 2, characterized in that: A return plate (310) is fixedly mounted on the smoke collection pipe (200); the return plate (310) is connected to an end of the telescopic reinforcement pipe (300) close to the smoke inlet (210) and is used to drive the telescopic reinforcement pipe (300) to extend and retract when the smoke collection pipe (200) moves.

5. The retractable pollutant sampling device according to claim 4, characterized in that: The smoke collection pipe (200) is provided with a scale, and the scale is used to judge the extended length of the smoke collection pipe (200).

6. The retractable pollutant sampling device according to claim 5, characterized in that: The smallest unit of the scale is millimeter.

7. The retractable pollutant sampling device according to claim 1, characterized in that: The blocking component is specifically made of rubber.

8. The retractable pollutant sampling device according to claim 1, characterized in that: The smoke collection pipe (200) and the telescopic reinforcement pipe (300) are specifically made of stainless steel.

9. The retractable pollutant sampling device according to claim 4, characterized in that: A rotating motor (410) is arranged on the first plug, a movable end of the rotating motor (410) is connected to a ball screw (420), the ball screw (420) passes through the return plate (310), and a screw nut (430) is fixedly arranged at a position on the return plate (310) corresponding to the ball screw (420), and a switch button (440) for controlling the rotation of the rotating motor (410) is arranged at an end of the smoke collection pipe (200) away from the smoke inlet (210).

10. The retractable pollutant sampling device according to claim 2, characterized in that: The second blocking member (120) is provided with a smoke sensor (500) and an alarm, the smoke sensor (500) and the alarm being electrically connected, the smoke sensor (500) being used to detect whether there is smoke escaping, and transmitting a signal to the alarm when the smoke is detected.

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