A filter membrane sampling device

Abstract

The utility model discloses a filter membrane sampling device, including dust wind box, the dust wind box one side is connected with dust removal tank, be provided with the sliding mechanism in the dust wind box, be equipped with the deflection formula filter membrane sampling assembly on the sliding mechanism, and the dust removal tank is located the sliding direction of sliding mechanism, is equipped with the cleaning, dust removal mechanism in the dust removal tank. Realized the deflection formula filter membrane sampling assembly sampling end in sampling in the orientation and wind and dust flow direction are identical, the orientation of sampling end after sampling and dust flow direction are not identical, like this sampling end after sampling, dust will flow with airflow, will not enter into the deflection formula filter membrane sampling assembly, and the dust on the filter membrane in the deflection formula filter membrane sampling assembly is the dust that sampling left, simultaneously, realized the cleaning and dust removal work of deflection formula filter membrane sampling assembly after sampling, and then effectively guaranteed the sampling precision and the precision of instrument calibration.

Description

Technical Field

[0001] This utility model belongs to the field of dust sampling technology, and in particular relates to a filter membrane sampling device. Background Technology

[0002] Currently, in the sampling process for calibrating dust concentration instruments, membrane sampling is a commonly used and highly accurate method. The sampling mechanism used is horizontally positioned and faces the wind (i.e., the sampling port faces the direction of the wind and dust source). After sampling, the sampling pump stops. However, because dust in the dusty environment is mobile, dust continues to be blown into the membrane sampling mechanism from the sampling port, leading to an increase in dust on the membrane. This increases the overall dust concentration during calculation, severely affecting sampling accuracy. If sampling is used for instrument calibration comparison, it will also affect the accuracy of instrument calibration.

[0003] Meanwhile, after the filter membrane sampling mechanism completes sampling, dust will also adhere to its outer wall. When the filter membrane sampling mechanism is removed for testing, the dust on the outer wall will inevitably fly up and fall onto the filter membrane, which will also affect the sampling accuracy and the accuracy of instrument calibration. Utility Model Content

[0004] This invention provides a filter membrane sampling device to improve sampling accuracy.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a filter membrane sampling device, including a dust box, a dust removal box connected to one side of the dust box, a sliding mechanism provided inside the dust box, an oscillating filter membrane sampling assembly provided on the sliding mechanism, the dust removal box being located in the sliding direction of the sliding mechanism, and a cleaning and dust removal mechanism provided inside the dust removal box.

[0006] As an improvement, the oscillating filter membrane sampling assembly includes a sampling head body with an internal air passage and a quick-release assembly type. One end of the sampling head body is threadedly connected to an air intake connector, and the other end is threadedly installed with an air inlet. The dust collection box is also equipped with a vacuum generating mechanism connected to the air intake connector.

[0007] It also includes a mounting base on which a rotating seat driven by a power element is rotatably mounted. The rotating seat is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector.

[0008] As a further improvement, the sampling head body includes a connecting tube sleeve that is threadedly connected to the air intake connector. A sleeve is inserted and sealed on the connecting tube sleeve. A first pressure head is threaded on the sleeve. A second pressure head is threadedly connected to the first pressure head. The air intake head is threadedly connected to the second pressure head.

[0009] 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.

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

[0011] As a further improvement, the hollow structure inside the first and second pressure heads is configured as a cone shape.

[0012] As a further improvement, a sealing element 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 sleeve.

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

[0015] As a further improvement, the sliding mechanism includes a bracket disposed inside the dust box, a first slide rail on the bracket, a second slide rail slidably mounted on the first slide rail and driven by a first linear drive element, and two oscillating filter membrane sampling assemblies disposed on the second slide rail, wherein one oscillating filter membrane sampling assembly is fixed on the second slide rail, and the other oscillating filter membrane sampling assembly is slidably mounted on the second slide rail via the mounting base and driven by a second linear drive element.

[0016] As an improvement, a partition is inserted between the dust box and the dust collector, 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 passage connector disposed on the dust removal box, and a spray gun is connected to the air passage connector. The spray gun is arranged in the operating chamber of the dust removal box.

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

[0019] An end cap is threaded onto the air intake 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 perforation plate. The dust removal box corresponding to the operating chamber is also provided with an air inlet perforation plate.

[0021] After adopting the above technical solution, the effect of this utility model is:

[0022] The sampling device includes a dust chamber with a dust collection box connected to one side. A sliding mechanism is installed inside the dust chamber, and a swing-type filter membrane sampling assembly is mounted on the sliding mechanism. The dust collection box is located in the sliding direction of the sliding mechanism and contains a cleaning and dust removal mechanism. Based on this structure, during sampling, the sampling end of the swing-type filter membrane sampling assembly faces the dust source direction inside the dust chamber and performs sampling. After sampling, the swing-type filter membrane sampling assembly rotates 90 degrees, causing the sampling end to deviate from the dust source direction. This makes the dust flow direction perpendicular to the direction of the air inlet, allowing the dust to flow away with the airflow. Then, the sliding mechanism allows the swing-type filter membrane sampling assembly to enter the dust collection box, where the cleaning and dust removal mechanism cleans the outer wall of the assembly and removes dust after cleaning.

[0023] In summary, this sampling device ensures that the sampling end of the oscillating filter membrane sampling assembly is aligned with the direction of wind and dust flow during sampling, but not with the direction of dust flow after sampling. This means that after sampling, the dust will flow away with the airflow and will not enter the oscillating filter membrane sampling assembly. The dust on the filter membrane inside the oscillating filter membrane sampling assembly is the dust left after sampling. Simultaneously, it enables the cleaning and dust removal of the oscillating filter membrane sampling assembly after sampling, thus effectively ensuring sampling accuracy and instrument calibration accuracy.

[0024] The oscillating filter membrane sampling assembly includes a sampling head body with an internal air passage and a quick-release assembly. One end of the sampling head body is threadedly connected to an air intake connector, and the other end is threadedly installed with an air inlet. The dust collection box also contains a vacuum generating mechanism connected to the air intake connector. It also includes a mounting base, on which a rotating seat driven by a power element is rotatably mounted. The rotating seat is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector. Thus, during use, the oscillating filter membrane sampling assembly performs suction sampling through the vacuum generating mechanism, and the rotation driven by the power element allows the switching of the sampling end (air inlet) of the oscillating filter membrane sampling assembly under different operating conditions. At the same time, through the threaded installation of the air inlet, air inlets of different diameters can be replaced. With a certain sampling power, the air velocity of the air inlet can be changed to achieve isokinetic sampling that matches the wind velocity in the sampling environment.

[0025] The sampling head body includes a connecting tube sleeve that is threadedly connected to the intake connector. A sleeve is inserted and sealed on the connecting tube sleeve. A first pressure head is threaded on the sleeve. A second pressure head is threadedly connected to the first pressure head. An air inlet head is threadedly connected to the second pressure head. Two pressure blocks are clamped and positioned between the first and second pressure heads. A filter membrane is clamped between the two pressure blocks. The intake connector, connecting tube sleeve, sleeve, first pressure head, second pressure head, and air inlet head are all equipped with coaxial hollow structures. All hollow structures form an air passage. Thus, the disassembly and assembly of various components such as the connecting tube sleeve are realized through the above structure. The structure is simple and the disassembly and assembly are quick and convenient.

[0026] Because the hollow structure inside the first and second pressure heads is set in a conical shape, the wind speed entering the air inlet head is reduced by the conical structure, which is conducive to the uniform distribution of dust on the filter membrane.

[0027] Because sealing elements are provided between the sleeve and the first pressure head, between the first pressure head and one of its intermediate 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 performance of the sampling head body is ensured; because an operating handle is provided on the outer wall of the connecting sleeve, the ease of disassembling and assembling the sampling head body is improved by operating the handle.

[0028] Because one corner of the mounting base is provided with an arc-shaped clearance part, which is located in the rotation direction of the rotating base, the arc-shaped clearance part avoids mutual interference between the mounting base and the rotating base, and also helps to improve the compactness after installation.

[0029] The sliding mechanism includes a bracket installed inside the dust collection box, a first slide rail on the bracket, a second slide rail slidably mounted on the first slide rail driven by a first linear drive element, and two oscillating filter membrane sampling assemblies on the second slide rail. One oscillating filter membrane sampling assembly is fixed on the second slide rail, and the other oscillating filter membrane sampling assembly is slidably mounted on the second slide rail via a mounting base and driven by a second linear drive element. Thus, the sliding mechanism enables the oscillating filter membrane sampling assembly to move between the dust collection box and the dust removal box. The structure is simple and the connection is good.

[0030] Because a partition is installed between the dust collection box and the dust removal box, and the partition is driven by a third linear drive element, the dust collection box and the dust removal box are isolated through the partition, thus preventing dust from entering the dust removal box from the dust collection box during the sampling process.

[0031] The cleaning and dust removal mechanism includes an air path connector mounted on the dust collection box, with a spray gun connected to it. The spray gun is located within the operating chamber of the dust collection box. An operating hole is provided on the dust collection box door panel corresponding to the operating chamber. An end cap is threaded onto the air inlet head. Therefore, when cleaning the outer wall of the oscillating filter membrane sampling assembly, the operator first installs the end cap onto the air inlet head through the operating hole, and then performs the cleaning work through the spray gun, thus preventing 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. The dust removal box between the dust removal chamber and the operating chamber is equipped with a dust removal perforation plate, and the dust removal box corresponding to the operating chamber is also equipped with an air inlet perforation plate. Thus, during dust removal, the fan works, and fresh air enters the operating chamber through the air inlet perforation plate. Then, together with the dust, it enters the dust removal chamber through the dust removal perforation plate and is then removed by the filter cartridge. The structure is simple, and the cleaning and dust removal processes are well connected. Attached Figure Description

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

[0034] Figure 1 This is the outline drawing of this utility model;

[0035] Figure 2 yes Figure 1 A schematic diagram of the structure of the dust removal air box;

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

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

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

[0039] Figure 6 yes Figure 5 View A in the middle;

[0040] Figure 7 yes Figure 6 Sectional view of the middle BB section;

[0041] Wherein, 1-dust air box; 101-channel; 102-partition; 103-third linear drive element; 2-dust collector; 201-operating chamber; 202-operating hole; 203-dust collector chamber; 204-dust collector orifice plate; 205-air inlet orifice plate; 206-vacuum pump; 207-vacuum tank; 208-suction connection pipe head; 3-sliding mechanism; 301-support; 302-first slide rail; 303-first linear drive element; 304-second slide rail; 305-second linear drive element; 4-Oscillating filter membrane sampling assembly; 401-Air passage; 402-Inhalation connector; 403-Inlet head; 404-Mounting base; 4041-Arc-shaped clearance part; 405-Power element; 406-Rotating seat; 407-Connecting sleeve; 4071-Operating handle; 408-Sleeve; 409-First pressure head; 410-Second pressure head; 411-Pressure block; 412-Filter membrane; 413-Seal; 414-End cap; 5-Cleaning and dust removal mechanism; 501-Air passage connector; 502-Filter cartridge. Detailed Implementation

[0042] The present invention will be further described in detail below through specific embodiments.

[0043] like Figures 1 to 4 As shown, a filter membrane sampling device includes a dust chamber 1 connected to a dust source. A dust collection box 2 is located on one side of the dust chamber 1, and a channel 101 is provided between the dust chamber 1 and the dust collection box 2 to allow them to communicate with each other. A partition 102 is slidably inserted between the dust chamber 1 and the dust collection box 2 at a position corresponding to the channel 101. The partition 102 is driven by a third linear drive element 103 (e.g., a cylinder or hydraulic cylinder). A sliding mechanism 3 is provided inside the dust chamber 1, and a swing-type filter membrane sampling assembly 4 is provided on the sliding mechanism 3. The dust collection 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 collection box 2. When in sampling mode, the sampling end of the swing-type filter membrane sampling assembly 4 faces the dust source direction; when not in sampling mode, the swing-type filter membrane sampling assembly 4 rotates and deviates from the dust source direction.

[0044] like Figures 5 to 7As shown, the oscillating filter membrane sampling assembly 4 includes a sampling head body with an internal air passage 401 and a quick-release 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 seat 406 driven by a power element 405 (such as a motor) is rotatably mounted. The rotating seat 406 is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector 402. In this design, the rotating seat 406 is L-shaped, and an arc-shaped clearance portion 4041 is provided at one corner of the mounting base 404, located in the rotation direction of the rotating seat 406.

[0045] The sampling head body includes a connecting sleeve 407 threadedly connected to the intake connector 402. A sleeve 408 is inserted and sealed onto the connecting sleeve 407. A first pressure head 409 is threaded onto the sleeve 408. A second pressure head 410 is threadedly connected to the first pressure head 409. An air inlet head 403 is threaded onto 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. A filter membrane 412 is clamped between the two pressure blocks 411. The intake connector 402, connecting sleeve 407, sleeve 408, first pressure head 409, second pressure head 410, and air inlet head 403 are all provided with coaxial hollow structures, and all hollow structures form an air passage 401. In this design, the hollow structures inside the first pressure head 409 and the second pressure head 410 are cone-shaped.

[0046] A sealing element 413 is provided between the sleeve 408 and the first pressure head 409, between the first pressure head 409 and one of its intermediate 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 sleeve 407.

[0047] like Figures 2 to 4 As shown, the sliding mechanism 3 includes a bracket 301 disposed inside the dust box 1. The bracket 301 is provided with a first slide rail 302. A second slide rail 304 driven by a first linear drive element 303 (e.g., a cylinder or hydraulic cylinder) is slidably mounted on the first slide rail 302. The second slide rail 304 is provided with two oscillating filter membrane sampling assemblies 4. One oscillating filter membrane sampling assembly 4 is fixed on the second slide rail 304, and the other oscillating filter membrane sampling assembly 4 is slidably mounted on the second slide rail 304 through a mounting base 404 and driven by a second linear drive element 305 (e.g., a cylinder or hydraulic cylinder).

[0048] like Figures 2 to 4As shown, the cleaning and dust removal mechanism 5 includes an air passage connector 501 mounted on the dust collection box 2, with a spray gun connected to the air passage connector 501. The spray gun is a conventional spray gun and is not shown in the figure. The spray gun is arranged inside the operating chamber 201 of the dust collection box 2. An operating hole 202 is provided on the door panel of the dust collection box 2 corresponding to the operating chamber 201. An end cap 414 is threaded onto the air inlet head 403. The cleaning and dust removal mechanism 5 also includes at least one filter cartridge 502 connected to a fan. The filter cartridge 502 is arranged inside the dust collection chamber 203 of the dust collection box 2. A dust collection perforation plate 204 is provided on the dust collection box 2 between the dust collection chamber 203 and the operating chamber 201. An air inlet perforation plate 205 is also provided on the dust collection box 2 corresponding to the operating chamber 201.

[0049] The dust collection box 2 is also equipped with a vacuum generating mechanism connected to the suction connector 402. The vacuum generating mechanism includes a vacuum tank 207 arranged in the dust collection box 2 and a plurality of vacuum pumps 206. The vacuum tank 207 is equipped with a plurality of suction connection pipes 208 that communicate with the suction connector 402. The vacuum tank 207 is also equipped with a pump connection pipe (not shown in the figure) connected to the vacuum pumps 206.

[0050] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A filter membrane sampling device, comprising a dust chamber, characterized in that; A dust collection box is connected to one side of the dust air box. A sliding mechanism is provided inside the dust air box. An oscillating filter membrane sampling assembly is provided on the sliding mechanism. The dust collection box is located in the sliding direction of the sliding mechanism. A cleaning and dust removal mechanism is provided inside the dust collection box. The oscillating filter membrane sampling assembly includes a sampling head body with an internal air passage and a quick-release assembly type. One end of the sampling head body is threadedly connected to an air intake connector, and the other end is threadedly installed with an air inlet. A vacuum generating mechanism connected to the air intake connector is also provided inside the dust collection box. It also includes a mounting base on which a rotating seat driven by a power element is rotatably mounted. The rotating seat is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector.

2. The filter membrane sampling device as described in claim 1, characterized in that: The sampling head body includes a connecting tube sleeve that is threadedly connected to the air intake connector. A sleeve is inserted and sealed on the connecting tube sleeve. A first pressure head is threaded on the sleeve. A second pressure head is threadedly connected to the first pressure head. The air intake head is threadedly connected to 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 intake connector, the connecting sleeve, the sleeve, the first pressure head, the second pressure head, and the air inlet head are all provided with coaxial hollow structures, and all the hollow structures form the air passage.

3. The filter membrane sampling device as described in claim 2, characterized in that: The hollow structure inside the first pressure head and the second pressure head is configured as a cone shape.

4. The filter membrane sampling device as described in claim 3, characterized in that: A sealing element 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; An operating handle is provided on the outer wall of the connecting sleeve.

5. A filter membrane sampling device as described in any one of claims 1 to 4, characterized in that: The mounting base has an arc-shaped clearance at one corner, and the arc-shaped clearance is located in the rotation direction of the rotating base.

6. The filter membrane sampling device as described in claim 1, characterized in that: The sliding mechanism includes a bracket disposed inside the dust box, a first slide rail on the bracket, a second slide rail slidably mounted on the first slide rail and driven by a first linear drive element, and two oscillating filter membrane sampling assemblies disposed on the second slide rail, wherein one of the oscillating filter membrane sampling assemblies is fixed on the second slide rail, and the other oscillating filter membrane sampling assembly is slidably mounted on the second slide rail via the mounting base and driven by a second linear drive element.

7. The filter membrane sampling device as described in claim 1, characterized in that: A partition is inserted between the dust box and the dust collector, and the partition is driven by a third linear drive element.

8. The filter membrane sampling device as described in claim 1, characterized in that: The cleaning and dust removal mechanism includes an air passage connector mounted on the dust removal box, and a spray gun is connected to the air passage connector. The spray gun is arranged in the operating chamber of the dust removal box. An operating hole is provided on the dust collector door panel corresponding to the operating chamber; An end cap is threaded onto the air intake head.

9. The filter membrane sampling device as described in 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. The dust removal box between the dust removal chamber and the operating chamber is provided with a dust removal perforation plate. The dust removal box corresponding to the operating chamber is also provided with an air inlet perforation plate.

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