Filter membrane sampling device

Abstract

The invention discloses a filter membrane sampling device which comprises a dust air box, one side of the dust air box is communicated with a dust removal box, a sliding mechanism is arranged in the dust air box, a deflection type filter membrane sampling assembly is arranged on the sliding mechanism, the dust removal box is located in the sliding direction of the sliding mechanism, and a sweeping and dust removal mechanism is arranged in the dust removal box. The orientation of the sampling end of the deflection type filter membrane sampling assembly during sampling is consistent with the flowing direction of wind and dust, and the orientation of the sampling end after sampling is inconsistent with the flowing direction of the dust, so that after sampling is finished, the dust flows away along with airflow and does not enter the deflection type filter membrane sampling assembly, and the sampling efficiency is improved. Dust on a filter membrane in the deflection type filter membrane sampling assembly is dust left by sampling, meanwhile, cleaning and dust removing work on the deflection type filter membrane sampling assembly after sampling is achieved, and therefore the sampling precision and the instrument calibration precision are effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of dust sampling, and in particular relates to a filter membrane sampling device. Background Art

[0002] At present, in the calibration sampling process of dust concentration meters, membrane sampling is a commonly used and highly accurate sampling method. The sampling mechanism used for sampling is set horizontally and is upwind sampling (that is, the sampling port is facing the direction of the wind and dust source). When the sampling is completed, the sampling pump stops sampling. Since the dust in the dust environment itself will flow, the dust will continue to be blown into the membrane sampling mechanism from the sampling port, thereby increasing the dust on the membrane in the sampling mechanism. In this way, when calculating the dust concentration, the overall concentration will increase, seriously affecting the sampling accuracy. If the sampling is for instrument calibration comparison, it will affect the accuracy of the instrument calibration.

[0003] At the same time, after the filter membrane sampling mechanism completes sampling, dust will be attached to its outer wall. When the filter membrane sampling mechanism is taken out for inspection, the dust attached to the outer wall will inevitably fly and fall onto the filter membrane, which will also affect the sampling accuracy and the accuracy of instrument calibration. Summary of the Invention

[0004] The present invention provides a filter membrane sampling device to achieve the purpose of improving sampling accuracy.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a filter membrane sampling device, including a dust bellows, one side of the dust bellows is connected to a dust removal box, a sliding mechanism is provided in the dust bellows, a swing-type filter membrane sampling assembly is provided on the sliding mechanism, the dust removal box is located in the sliding direction of the sliding mechanism, and a cleaning and dust removal mechanism is provided in the dust removal box.

[0006] As an improvement, the deflection filter membrane sampling assembly includes a sampling head body with an air passage inside and a quick-disassembly assembly type, one end of the sampling head body is threadedly connected to an air suction joint, and the other end is threadedly installed with an air inlet head, and the dust removal box is also provided with a vacuum generating mechanism connected to the air suction joint;

[0007] It also includes a mounting base, on which a rotating base driven by a power element is rotatably mounted. The rotating base is sleeved on the sampling head body and clamped and positioned between the sampling head body and the air suction joint.

[0008] As a further improvement, the sampling head body includes a connecting pipe sleeve threadedly connected to the air intake joint, a sleeve is inserted and sealed on the connecting pipe sleeve, a first pressure head is threaded on the sleeve, a second pressure head is threaded on the first pressure head, and the air intake head is threaded on the second pressure head;

[0009] Two pressing blocks are clamped and positioned between the first pressing head and the second pressing head, and a filter membrane is clamped between the two pressing blocks;

[0010] The air intake joint, the connecting pipe sleeve, the sleeve, the first pressure head, the second pressure head and the air intake head are all provided with coaxial hollow structures, and all the hollow structures form the airway.

[0011] As a further improvement, the hollow structures in the first pressure head and the second pressure head are configured to be conical.

[0012] As a further improvement, a seal is provided between the sleeve and the first pressure head, between the first pressure head and one of the pressure blocks, between the other pressure block and the second pressure head, and between the second pressure head and the air inlet head.

[0013] An operating handle is provided on the outer wall of the connecting pipe sleeve.

[0014] As a further improvement, an arc-shaped avoidance portion is provided at one corner of the mounting seat, and the arc-shaped avoidance portion is located in the rotation direction of the rotating seat.

[0015] As a further improvement, the sliding mechanism includes a bracket arranged in the dust bellows, the bracket is provided with a first slide rail, the first slide rail is slidably mounted with a second slide rail driven by a first linear drive element, the second slide rail is provided with two swing-type filter membrane sampling assemblies, one of the swing-type filter membrane sampling assemblies is fixed on the second slide rail, and the other swing-type filter membrane sampling assembly is slidably mounted on the second slide rail through the mounting seat and is driven by the second linear drive element.

[0016] As an improvement, a partition is inserted between the dust wind box and the dust removal box, and the partition is driven by a third linear drive element.

[0017] As a further improvement, the cleaning and dust removal mechanism includes an air connection head provided on the dust removal box, the air connection head is connected to a spray gun, and the spray gun is arranged in the operating chamber of the dust removal box;

[0018] An operating hole is provided on the door panel of the dust removal box corresponding to the operating chamber;

[0019] An end cover is threadedly mounted on the air inlet head.

[0020] As a further improvement, the cleaning and dust removal mechanism also includes at least one filter cartridge connected to the fan, the filter cartridge is arranged in the dust removal chamber of the dust removal box, the dust removal box between the dust removal chamber and the operating chamber is provided with a dust removal orifice plate, and the dust removal box corresponding to the operating chamber is also provided with an air intake orifice plate.

[0021] After adopting the above technical solution, the effects of the present invention are:

[0022] Since the sampling device includes a dust bellows, one side of the dust bellows is connected to a dust removal box, a sliding mechanism is provided in the dust bellows, a swing-type filter membrane sampling assembly is provided on the sliding mechanism, the dust removal box is located in the sliding direction of the sliding mechanism, and a cleaning and dust removal mechanism is provided in the dust removal box. Based on the above structure, during the sampling work of the sampling device, the sampling end of the swing-type filter membrane sampling assembly is facing the direction of the dust source in the dust bellows and performs sampling work. After the sampling is completed, the swing-type filter membrane sampling assembly rotates 90 degrees and the sampling end deviates from the direction of the dust source, so that the flow direction of the dust is perpendicular to the direction of the air intake head, and the dust will flow away with the airflow; thereafter, the swing-type filter membrane sampling assembly is made to enter the dust removal box through the sliding mechanism, and the outer wall of the swing-type filter membrane sampling assembly is cleaned by the cleaning and dust removal mechanism, and the dust is removed after cleaning.

[0023] To sum up, the sampling device is used to ensure that the direction of the sampling end of the swing filter membrane sampling assembly during sampling is consistent with the flow direction of wind and dust, and the direction of the sampling end after sampling is inconsistent with the flow direction of dust. In this way, after the sampling is completed, the dust will flow away with the airflow and will not enter the swing filter membrane sampling assembly. The dust on the filter membrane in the swing filter membrane sampling assembly is the dust left by the sampling. At the same time, the cleaning and dust removal of the swing filter membrane sampling assembly after sampling is realized, thereby effectively ensuring the sampling accuracy and the accuracy of instrument calibration.

[0024] Since the deflection filter membrane sampling assembly includes a sampling head body with an air duct inside and a quick-disassembly assembly type, one end of the sampling head body is threadedly connected to the suction joint, and the other end is threadedly installed with an air inlet head, and a vacuum generating mechanism connected to the suction joint is also provided in the dust removal box; it also includes a mounting seat, on which a rotating seat driven by a power element is rotatably installed, the rotating seat is mounted on the sampling head body, and is clamped and positioned between the sampling head body and the suction joint, so that in use, the deflection filter membrane sampling assembly is used to perform suction sampling through the vacuum generating mechanism, and the rotation is driven by the power element to realize the switching of the sampling end (air inlet head) of the deflection filter membrane sampling assembly under different working conditions; at the same time, through the threaded installation of the air inlet head, air inlet heads of different calibers can be replaced. When the sampling power is constant, the wind speed of the air entering the air inlet head can be changed to achieve constant-speed sampling that matches the wind speed in the sampling environment.

[0025] The sampling head body includes a connecting sleeve threadedly connected to the suction joint, a sleeve is sealed on the connecting sleeve, a first pressure head is threaded on the sleeve, a second pressure head is threadedly connected to the first pressure head, and an air intake head is threaded on the second pressure head; two pressure blocks are clamped and positioned between the first pressure head and the second pressure head, and a filter membrane is clamped between the two pressure blocks; the suction joint, the connecting sleeve, the sleeve, the first pressure head, the second pressure head and the air intake head are all provided with a coaxial hollow structure, and all the hollow structures form an airway, so that the disassembly and assembly of various components such as the connecting sleeve are realized through the above structure, the structure is simple, and the disassembly and assembly are fast and convenient.

[0026] Since the hollow structures in the first pressure head and the second pressure head are set to be conical, the conical structure can slow down the wind speed entering the air inlet head, which is conducive to the uniform distribution of dust on the filter membrane.

[0027] Since seals are provided between the sleeve and the first pressure head, between the first pressure head and one of its middle pressure blocks, between the other pressure block and the second pressure head, and between the second pressure head and the air inlet head, the sealing of the sampling head body is ensured; since an operating handle is provided on the outer wall of the connecting pipe sleeve, the convenience of disassembly and assembly of the sampling head body is improved through the operating handle.

[0028] Since an arc-shaped avoidance portion is provided at one corner of the mounting seat, and the arc-shaped avoidance portion is located in the rotation direction of the rotating seat, the arc-shaped avoidance portion can avoid mutual interference between the mounting seat and the rotating seat, and is conducive to improving the compactness after installation.

[0029] Since the sliding mechanism includes a bracket arranged in the dust bellows, a first slide rail is provided on the bracket, a second slide rail driven by a first linear drive element is slidably installed on the first slide rail, and two swing-type filter membrane sampling assemblies are provided on the second slide rail, one of which is fixed on the second slide rail, and the other is slidably installed on the second slide rail through a mounting seat and driven by the second linear drive element, thereby realizing the movement of the swing-type filter membrane sampling assembly between the dust bellows and the dust removal box through the above-mentioned sliding mechanism, with a simple structure and good connection.

[0030] Since a partition is inserted between the dust bellows and the dust removal box, and the partition is driven by the third linear drive element, the dust bellows and the dust removal box are isolated by the partition, thereby preventing dust from entering the dust removal box from the dust bellows during the sampling process.

[0031] Since the cleaning and dust removal mechanism includes an air path connector provided on the dust removal box, the air path connector is connected to a spray gun, and the spray gun is arranged in the operating chamber of the dust removal box; an operating hole is provided on the dust removal box door panel corresponding to the operating chamber; an end cover is threadedly installed on the air inlet head, so when dust is removed from the outer wall of the swing-type filter membrane sampling assembly, the staff first installs the end cover on the air inlet head through the operating hole, and then performs cleaning work with the spray gun, to prevent dust from entering the sampling head body and affecting the sampling accuracy.

[0032] Since the cleaning and dust removal mechanism also includes at least one filter cartridge connected to the fan, the filter cartridge is arranged in the dust removal chamber of the dust removal box, a dust removal orifice plate is provided on the dust removal box between the dust removal chamber and the operating chamber, and an air intake orifice plate is also provided on the dust removal box corresponding to the operating chamber. Therefore, during dust removal, the fan is working, and fresh air enters the operating chamber through the air intake orifice plate, and then enters the dust removal chamber together with the dust through the dust removal orifice plate, and then is removed by the filter cartridge. The structure is simple, and the connection between the cleaning and dust removal processes is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings and examples.

[0034] Figure 1 It is an outline diagram of the present invention;

[0035] Figure 2 yes Figure 1 Schematic diagram of the structure after removing the dust bellows;

[0036] Figure 3 yes Figure 2 Structural diagram from another angle;

[0037] Figure 4 yes Figure 2 Structural schematic diagram of another working state (dust removal state);

[0038] Figure 5 yes Figure 4 Schematic diagram of the structure of the mid-swing filter membrane sampling assembly;

[0039] Figure 6 yes Figure 5 A-direction view in;

[0040] Figure 7 yes Figure 6 Cross-sectional view of the middle BB part;

[0041] Among them, 1-dust bellows; 101-channel; 102-partition; 103-third linear drive element; 2-dust removal box; 201-operating chamber; 202-operating hole; 203-dust removal chamber; 204-dust removal orifice plate; 205-air inlet orifice plate; 206-vacuum pump; 207-vacuum tank; 208-suction connecting pipe head; 3-sliding mechanism; 301-bracket; 302-first slide rail; 303-first linear drive element; 304-second slide rail; 305-second linear drive element; 4-swaying filter membrane sampling assembly; 401-air duct; 402-inhalation connector; 403-air inlet head; 404-mounting seat; 4041-arc-shaped avoidance portion; 405-power element; 406-rotating seat; 407-connecting pipe sleeve; 4071-operating handle; 408-casing; 409-first pressure head; 410-second pressure head; 411-pressure block; 412-filter membrane; 413-seal; 414-end cover; 5-cleaning and dust removal mechanism; 501-air path connector; 502-filter cartridge. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below through specific examples.

[0043] like Figures 1 to 4 As shown together, a filter membrane sampling device includes a dust bellows 1 connected to a dust source, a dust box 2 provided on one side of the dust bellows 1, and a channel 101 provided between the dust bellows 1 and the dust box 2 for interconnection between the two. A partition 102 is slidably inserted between the dust bellows 1 and the dust box 2 at a position corresponding to the channel 101, and the partition 102 is driven by a third linear drive element 103 (such as a pneumatic cylinder or an oil cylinder). A sliding mechanism 3 is provided inside the dust bellows 1, and a swing-type filter membrane sampling assembly 4 is provided on the sliding mechanism 3. The dust box 2 is located in the sliding direction of the sliding mechanism 3, and a cleaning and dust removal mechanism 5 is provided inside the dust box 2. When in the sampling state, the sampling end of the swing-type filter membrane sampling assembly 4 faces the direction of the dust source. When in the non-sampling state, the swing-type filter membrane sampling assembly 4 rotates and deviates from the direction of the dust source.

[0044] like Figures 5 to 7As shown, the deflection filter sampling assembly 4 includes a sampling head body with an internal air passage 401 and a quick-disassembly assembly type. One end of the sampling head body is threadedly connected to an air intake connector 402, and the other end (sampling end) is threadedly mounted with an air inlet head 403. It also includes a mounting base 404, on which a rotating base 406 driven by a power element 405 (such as a motor, etc.) is rotatably mounted. The rotating base 406 is mounted on the sampling head body and clamped and positioned between the sampling head body and the air intake connector 402. In this embodiment, the rotating base 406 is configured as an L-shape, and one of the corners of the mounting base 404 is provided with an arc-shaped avoidance portion 4041, which is located in the rotation direction of the rotating base 406.

[0045] The sampling head body includes a connecting sleeve 407 threadedly connected to the air intake connector 402, a sleeve 408 sealedly inserted into the connecting sleeve 407, a first pressure head 409 threadedly connected to the first pressure head 409, a second pressure head 410 threadedly connected to the second pressure head 410, and an air intake head 403 threadedly connected to the second pressure head 410; two pressure blocks 411 are clamped and positioned between the first pressure head 409 and the second pressure head 410, and a filter membrane 412 is clamped between the two pressure blocks 411; the air intake connector 402, the connecting sleeve 407, the sleeve 408, the first pressure head 409, the second pressure head 410, and the air intake head 403 are all provided with coaxial hollow structures, and all of these hollow structures form an airway 401. In this embodiment, the hollow structures within the first pressure head 409 and the second pressure head 410 are configured to be conical.

[0046] Seals 413 are provided between the sleeve 408 and the first pressure head 409, between the first pressure head 409 and one of its middle pressure blocks 411, between the other pressure block 411 and the second pressure head 410, and between the second pressure head 410 and the air inlet head 403; an operating handle 4071 is provided on the outer wall of the connecting pipe sleeve 407.

[0047] like Figures 2 to 4 As shown in common, the sliding mechanism 3 includes a bracket 301 arranged in the dust bellows 1, and a first slide rail 302 is provided on the bracket 301. A second slide rail 304 driven by a first linear drive element 303 (such as a pneumatic cylinder or an oil cylinder) is slidably installed on the first slide rail 302. Two swing-type filter membrane sampling assemblies 4 are provided on the second slide rail 304, one of which is fixed on the second slide rail 304, and the other is slidably installed on the second slide rail 304 through a mounting seat 404 and driven by a second linear drive element 305 (such as a pneumatic cylinder or an oil cylinder).

[0048] like Figures 2 to 4As shown in common, the cleaning and dust removal mechanism 5 includes an air circuit connector 501 arranged on the dust removal box 2, and the air circuit connector 501 is connected to a spray gun. The spray gun is selected from the spray gun in the prior art, so it is not shown in the figure. The spray gun is arranged in the operating chamber 201 of the dust removal box 2; an operating hole 202 is provided on the door panel of the dust removal box 2 corresponding to the operating chamber 201; an end cover 414 is threadedly installed on the air inlet head 403; the cleaning and dust removal mechanism 5 also includes at least one filter cartridge 502 connected to the fan, and the filter cartridge 502 is arranged in the dust removal chamber 203 of the dust removal box 2, and a dust removal orifice plate 204 is provided on the dust removal box 2 between the dust removal chamber 203 and the operating chamber 201, and an air inlet orifice plate 205 is also provided on the dust removal box 2 corresponding to the operating chamber 201.

[0049] The dust removal box 2 is also provided with a vacuum generating mechanism connected to the suction connector 402. The vacuum generating mechanism includes a vacuum tank 207 and multiple vacuum pumps 206 arranged in the dust removal box 2. The vacuum tank 207 is provided with multiple suction connecting pipe heads 208 connected to the suction connector 402. The vacuum tank 207 is also provided with a pump connecting pipe head connected to the vacuum pump 206 (not shown in the figure).

[0050] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A membrane filter sampling device, comprising a dust bellows, characterized in that; One side of the dust bellows is connected to a dust removal box, a sliding mechanism is provided in the dust bellows, a swing-type filter membrane sampling assembly is provided on the sliding mechanism, the dust removal box is located in the sliding direction of the sliding mechanism, and a cleaning and dust removal mechanism is provided in the dust removal box; the swing-type filter membrane sampling assembly includes a sampling head body with an air duct provided therein and of a quick-disassembly assembly type, one end of the sampling head body is threadedly connected to an air suction joint, and the other end is threadedly mounted with an air inlet head, and a vacuum generating mechanism connected to the air suction joint is further provided in the dust removal box; It also includes a mounting base, on which a rotating base driven by a power element is rotatably mounted. The rotating base is sleeved on the sampling head body and clamped and positioned between the sampling head body and the air suction joint.

2. A membrane sampling device according to claim 1, characterized in that: The sampling head body includes a connecting pipe sleeve threadedly connected to the air intake joint, a sleeve is inserted and sealed on the connecting pipe sleeve, a first pressure head is threaded on the sleeve, a second pressure head is threadedly connected to the first pressure head, and the air intake head is threadedly connected to the second pressure head; Two pressing blocks are clamped and positioned between the first pressing head and the second pressing head, and a filter membrane is clamped between the two pressing blocks; The air intake joint, the connecting pipe sleeve, the sleeve, the first pressure head, the second pressure head and the air intake head are all provided with coaxial hollow structures, and all the hollow structures form the airway.

3. A membrane sampling device according to claim 2, characterized in that: The hollow structures in the first pressure head and the second pressure head are configured to be conical.

4. A membrane sampling device according to claim 3, characterized in that: Seals are provided between the sleeve and the first pressure head, between the first pressure head and one of the pressure blocks, between the other pressure block and the second pressure head, and between the second pressure head and the air inlet head; An operating handle is provided on the outer wall of the connecting pipe sleeve.

5. A membrane sampling device according to any one of claims 1 to 4, characterized in that: An arc-shaped avoidance portion is provided at one corner of the mounting seat, and the arc-shaped avoidance portion is located in the rotation direction of the rotating seat.

6. A membrane sampling device according to claim 1, characterized in that: The sliding mechanism includes a bracket arranged in the dust bellows, a first slide rail is provided on the bracket, a second slide rail driven by a first linear drive element is slidably installed on the first slide rail, and two swing-type filter membrane sampling assemblies are provided on the second slide rail, one of the swing-type filter membrane sampling assemblies is fixed on the second slide rail, and the other swing-type filter membrane sampling assembly is slidably installed on the second slide rail through the mounting seat and is driven by the second linear drive element.

7. A membrane sampling device according to claim 1, characterized in that: A partition is inserted between the dust wind box and the dust removal box, and the partition is driven by a third linear drive element.

8. The filter membrane sampling device according to claim 1, characterized in that: The cleaning and dust removal mechanism includes an air connection head provided on the dust removal box, the air connection head is connected to a spray gun, and the spray gun is arranged in the operating chamber of the dust removal box; An operating hole is provided on the door panel of the dust removal box corresponding to the operating chamber; An end cover is threadedly mounted on the air inlet head.

9. A membrane filter sampling device according to claim 8, characterized in that: The cleaning and dust removal mechanism also includes at least one filter cartridge connected to the fan, the filter cartridge is arranged in the dust removal chamber of the dust removal box, a dust removal orifice plate is provided on the dust removal box between the dust removal chamber and the operating chamber, and an air intake orifice plate is also provided on the dust removal box corresponding to the operating chamber.

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