A membrane filter sampling assembly

Abstract

The utility model discloses a filter membrane sampling assembly, including fixed base, the rotatory seat of power element drive is installed on fixed base, is equipped with filter membrane sampling head assembly on the rotatory seat, is installed with the air inlet head on filter membrane sampling head assembly screw thread. Realized the orientation of air inlet head in sampling and the flow direction of wind and particulate matter are consistent, the orientation of air inlet head after sampling and the flow direction of wind and particulate matter are not consistent, like this, after sampling ends, particulate matter will flow with airflow, will not enter into filter membrane sampling head assembly, and the particulate matter on filter membrane in filter membrane sampling head assembly is the particulate matter that sampling left, guarantees the sampling precision and the precision of instrument calibration, simultaneously, through the screw thread installation of air inlet head, can replace the air inlet head of different caliber, can change the wind speed of air inlet head air inlet under the condition that the sampling power is certain, realizes the isokinetic sampling that matches with the wind speed in sampling environment.

Description

Technical Field

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

[0002] Currently, membrane sampling is a commonly used and highly accurate method for dust sampling. The sampling mechanism 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, but because the particles in the dust environment are constantly moving, they continue to be blown into the membrane sampling mechanism from the sampling port. This leads to an increase in the amount of particles on the membrane, resulting in a higher overall concentration when calculating particle concentration, severely affecting sampling accuracy. If sampling is used for instrument calibration and comparison, it will also affect the accuracy of instrument calibration. Utility Model Content

[0003] This invention provides a filter membrane sampling component to improve sampling accuracy.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a filter membrane sampling assembly, including a fixed base, a rotating base driven by a power element is rotatably mounted on the fixed base, a filter membrane sampling head assembly is provided on the rotating base, and an air inlet head is threadedly mounted on the filter membrane sampling head assembly.

[0005] As an improvement, the filter membrane sampling head 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 air inlet head is arranged at the other end of the sampling head body.

[0006] The rotating seat is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] As a further improvement, the hollow structure inside the first and second pressure heads is configured as a cone shape.

[0011] 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.

[0012] As a further improvement, an operating handle is provided on the outer wall of the connecting sleeve.

[0013] As a further improvement, an end cap is threaded onto the air intake head.

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

[0015] As a further improvement, the fixing seat is fixedly installed on the slide.

[0016] After adopting the above technical solution, the effect of this utility model is:

[0017] The filter membrane sampling assembly includes a fixed base, on which a rotating base driven by a power element is rotatably mounted. The rotating base is equipped with a filter membrane sampling head assembly, and an air inlet is threaded onto the filter membrane sampling head assembly. During sampling, the power element drives the rotating base to rotate until the sampling head assembly on the rotating base is in a horizontal position and the air inlet faces the direction of the wind and dust source. At this time, the sampling pump connected to the sampling head assembly draws air and achieves windward sampling. After sampling, the sampling pump stops working, and the power element drives the rotating base to rotate 90 degrees in the opposite direction and make the sampling head assembly vertical. In this way, the flow direction of wind and particulate matter is perpendicular to the orientation of the air inlet, and the particulate matter will flow away with the airflow.

[0018] In summary, this filter membrane sampling assembly ensures that the orientation of the air inlet head is consistent with the flow direction of the wind and particles during sampling, but not after sampling. This means that after sampling, particles will flow away with the airflow and will not enter the filter membrane sampling head assembly. The particles remaining on the filter membrane inside the assembly are the particles left after sampling, guaranteeing sampling accuracy and instrument calibration accuracy. Furthermore, the threaded installation of the air inlet head allows for the replacement of air inlets of different diameters. With a fixed sampling power, the air velocity entering the air inlet head can be changed to achieve constant-velocity sampling that matches the wind speed in the sampling environment.

[0019] The filter membrane sampling head 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 air inlet head is arranged at the other end of the sampling head body. The rotating seat is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector, realizing the quick positioning and installation of the rotating seat between the sampling head body and the air intake connector.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] The operating handle on the outer wall of the connecting tube sleeve improves the ease of assembling and disassembling the sampling head body.

[0024] Since the air inlet head has a threaded end cap, after sampling, the end cap is installed on the air inlet head, and then the dust on the outer wall of the sampling head body is cleaned to prevent dust from entering the sampling head body and affecting the sampling accuracy.

[0025] Because the fixed base has an arc-shaped clearance part at one corner, which is located in the rotation direction of the rotating base, the arc-shaped clearance part avoids mutual interference between the fixed base and the rotating base, and also helps to improve the compactness after installation.

[0026] Since the fixed base is fixedly installed on the slide, the filter membrane sampling component is moved by the sliding of the slide, which makes it easy to remove it from the dusty environment by mechanical means. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 yes Figure 1 View A in the middle;

[0030] Figure 3 yes Figure 2 Sectional view of the middle BB section;

[0031] Among them, 1-fixed seat; 101-arc-shaped clearance part; 2-slide seat; 3-power element; 4-rotating seat; 5-filter membrane sampling head assembly; 501-air inlet head; 502-air passage; 503-inhalation connector; 504-connecting tube sleeve; 505-sleeve; 506-first pressure head; 507-second pressure head; 508-pressure block; 509-filter membrane; 510-operating handle; 6-end cap; 7-sealant. Detailed Implementation

[0032] The present invention will be further described in detail below through specific embodiments.

[0033] like Figures 1 to 3 As shown, a filter membrane sampling assembly includes a fixed base 1, which is fixedly mounted on a slide 2. A rotating seat 4 driven by a power element 3 (such as a motor) is rotatably mounted on the fixed base 1. A filter membrane sampling head assembly 5 is provided on the rotating seat 4. An air inlet head 501 is threadedly mounted on the filter membrane sampling head assembly 5. An end cap 6 is threadedly mounted on the air inlet head 501. Preferably, an arc-shaped clearance portion 101 is provided at one corner of the fixed base 1, and the arc-shaped clearance portion 101 is located in the rotation direction of the rotating seat 4.

[0034] The filter membrane sampling head assembly 5 includes a sampling head body with an internal air passage 502 and a quick-release assembly type. One end of the sampling head body is threadedly connected to an air intake connector 503 that communicates with a sampling pump, and the air inlet head 501 is arranged at the other end of the sampling head body. The rotating seat 4 is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector 503.

[0035] The sampling head body includes a connecting sleeve 504 threadedly connected to an air intake connector 503. A sleeve 505 is inserted and sealed onto the connecting sleeve 504. A first pressure head 506 is threaded onto the sleeve 505. A second pressure head 507 is threadedly connected to the first pressure head 506. An air inlet head 501 is threadedly connected to the second pressure head 507. Two pressure blocks 508 are clamped and positioned between the first pressure head 506 and the second pressure head 507. A filter membrane 509 is clamped between the two pressure blocks 508. The air intake connector 503, connecting sleeve 504, sleeve 505, first pressure head 506, second pressure head 507, and air inlet head 501 are all provided with coaxial hollow structures. All hollow structures form an air passage 502 (see...). Figure 3 ).

[0036] In this design, the hollow structure inside the first pressure head 506 and the second pressure head 507 is set in a conical shape; a sealing element 7 (such as a sealing ring) is provided between the sleeve 505 and the first pressure head 506, between the first pressure head 506 and one of its intermediate pressure blocks 508, between the other pressure block 508 and the second pressure head 507, and between the second pressure head 507 and the air inlet head 501; an operating handle 510 is provided on the outer wall of the connecting sleeve 504.

[0037] 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 assembly, comprising a fixing base, characterized in that; A rotating seat driven by a power element is rotatably mounted on the fixed base. A filter membrane sampling head assembly is provided on the rotating seat, and an air inlet head is threaded onto the filter membrane sampling head assembly.

2. The filter membrane sampling assembly as described in claim 1, characterized in that: The filter membrane sampling head 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 air inlet head is arranged at the other end of the sampling head body. The rotating seat is fitted onto the sampling head body and clamped and positioned between the sampling head body and the air intake connector.

3. The filter membrane sampling assembly as described in claim 2, 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.

4. The filter membrane sampling assembly as described in claim 3, characterized in that: The hollow structure inside the first pressure head and the second pressure head is set in a conical shape.

5. The filter membrane sampling assembly as described in claim 4, 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.

6. The filter membrane sampling assembly as described in claim 5, characterized in that: An operating handle is provided on the outer wall of the connecting sleeve.

7. A filter membrane sampling assembly as described in any one of claims 1 to 6, characterized in that: An end cap is threaded onto the air intake head.

8. The filter membrane sampling assembly as described in claim 7, characterized in that: The fixed base has an arc-shaped clearance part at one corner, and the arc-shaped clearance part is located in the rotation direction of the rotating base.

9. A filter membrane sampling assembly as described in claim 8, characterized in that: The fixed base is fixedly installed on the slide.

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