Automatic film-changing air inlet device

Abstract

The invention relates to environment monitoring equipment, in particular to an automatic film changing air inlet device which comprises two or more air inlet units, each air inlet unit comprises an upper film cover, a lower film column and a lower film column pushing assembly, an air inlet is formed in the upper film cover, an air outlet is formed in the lower film column, the lower film column is located below the upper film cover, and the lower film column pushing assembly is located below the upper film cover. A filter membrane belt is clamped between the lower membrane column and the upper membrane cover of each air inlet unit, during sample introduction, the lower membrane column pushing assembly drives the lower membrane column to move upwards to clamp the filter membrane belt between the lower membrane column and the upper membrane cover, and during membrane replacement, the lower membrane column pushing assembly drives the lower membrane column to move downwards to clamp the filter membrane belt between the lower membrane column and the upper membrane cover. The lower membrane column is separated from the upper membrane cover, the filter membrane belt is moved, and a new filter membrane belt enters the space between the lower membrane column and the upper membrane cover of each air inlet unit. The automatic film changing and air inlet device is high in film changing efficiency and air inlet efficiency.

Description

Technical Field

[0001] The present invention relates to an environmental monitoring device, and particularly to an automatic membrane-changing air intake device. Background Art

[0002] During the process of introducing air into the monitoring device through a sampling tube by the environmental monitoring device, it is necessary to block large particles such as dust in the air through a filter membrane to prevent the large particles from entering the interior of the monitoring device and causing damage to the monitoring device. When the filter membrane is used for a certain period of time, the filter membrane will be blocked due to the accumulation of dust, so the filter membrane needs to be replaced regularly.

[0003] For the existing sampling air intake settings, most of them first transport the membrane tow to a designated position, and then transport the membrane tow at the designated position to the air inlet and outlet position through a conveying device. After that, the air intake work starts. After the air intake work is completed, the used membrane tow is transported back to the large slide table through the conveying device (conveyor belt or slide table). After being transported back, the large slide table is lifted up by one position for the next sampling action. Such a device is not only huge in volume and complex in structure, but also can only operate to replace one filter membrane at a time, with low efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic membrane-changing air intake device with relatively high membrane-changing efficiency and air intake efficiency.

[0005] To achieve the above object, an automatic membrane-changing air intake device of the present invention includes two or more intake units with the same structure. Each of the intake units is at the same height. The intake unit includes an upper membrane cover, a lower membrane column, and a lower membrane column pushing component. An air inlet is provided on the upper membrane cover, and an air outlet is provided on the lower membrane column. The upper membrane cover is adapted to cover or leave the lower membrane column. The lower membrane column is located below the upper membrane cover and is vertically arranged. The filter membrane belt is clamped between the lower membrane column and the upper membrane cover of each intake unit. The lower membrane column pushing component is connected to the lower membrane column, and the lower membrane column pushing component drives the lower membrane column to move upward or downward. During sampling, the lower membrane column pushing component drives the lower membrane column to move upward, and the upper membrane cover covers the lower membrane column to clamp the filter membrane belt between the lower membrane column and the upper membrane cover. During membrane changing, the upper membrane cover is opened, the lower membrane column pushing component drives the lower membrane column to move downward, the lower membrane column is separated from the upper membrane cover, the filter membrane belt is moved, and the filter membrane belt clamped between the lower membrane column and the upper membrane cover of each intake unit moves downstream, and a new filter membrane belt enters between the lower membrane column and the upper membrane cover of each intake unit.

[0006] Further, the intake unit further includes a bracket and a membrane cover connecting plate. The upper membrane cover is connected to the membrane cover connecting plate. One end of the membrane cover connecting plate is hinged to the bracket, and the membrane cover connecting plate is adapted to drive the upper membrane cover to rotate.

[0007] Further, the lower membrane column pushing assembly includes a push rod, a fork, and a fork mounting block. The fork mounting block is located on one side of the lower membrane column and is connected to the bracket. A through hole is provided at the bottom of the lower membrane column, and the through hole is arranged along the radial direction of the lower membrane column. The push rod is vertically arranged. One end of the fork is hinged to the top of the push rod, and the other end extends into the through hole. The middle part of the fork is rotatably connected to the fork mounting block. When the push rod moves upward, the fork drives the lower membrane column to move downward, and when the push rod moves downward, the fork drives the lower membrane column to move upward.

[0008] Further, the middle part of the fork is connected to the fork mounting block through a bearing.

[0009] Further, the air intake unit further includes a pressure spring and a lower membrane guide cylinder. The outer wall of the lower membrane column is stepped. The lower membrane column is partially arranged in the lower membrane guide cylinder. The bottom of the lower membrane column passes through the lower membrane guide cylinder and extends outside the lower membrane guide cylinder. The lower membrane column is adapted to move up and down relative to the lower membrane guide cylinder. The pressure spring is sleeved on the small-diameter part of the lower membrane column. The upper end of the pressure spring abuts against the outer wall boss of the lower membrane column, and the lower end abuts against the bottom of the lower membrane guide cylinder.

[0010] Further, the air intake unit further includes a sealing ring, and the sealing ring is arranged between the upper membrane cover and the lower membrane column.

[0011] Further, the air intake unit further includes an air inlet nozzle and an air outlet nozzle. The air inlet nozzle is arranged on the air inlet, and the air outlet nozzle is arranged on the air outlet.

[0012] The automatic membrane-changing air intake device of the present invention has at least the following beneficial effects

[0013] The automatic membrane-changing air intake device of the present invention, since it includes more than two air intake units, and the air intake unit includes an upper membrane cover, a lower membrane column, and a lower membrane column pushing assembly, and the lower membrane column pushing assembly can drive the lower membrane column to move up and down, so it can synchronously move the lower membrane columns of each air intake unit, synchronously change the membranes for each air intake unit, improve the membrane-changing efficiency, and multiple air intake units can be set according to needs to improve the air intake efficiency. Also, since the lower membrane column is driven to move up and down by the lower membrane column pushing assembly, automatic membrane-changing can be realized by controlling the lower membrane column pushing assembly.

[0014] The following specifically describes the automatic membrane-changing air intake device of the present invention with reference to the drawings. Description of the Drawings

[0015] Figure 1 It is a sectional view of one air intake unit in the automatic membrane-changing air intake device of the present invention;

[0016] Figure 2 This is the installation structure diagram of the air intake unit in the automatic membrane-changing air intake device of the present invention;

[0017] Figure 3 This is the structure diagram of the lower membrane column propulsion assembly in the automatic membrane-changing air intake device of the present invention;

[0018] Figure 4 This is the schematic diagram of the open state of the upper membrane cover in the automatic membrane-changing air intake device of the present invention;

[0019] Figure 5 This is the schematic diagram of the state where the filter membrane belt can move forward for membrane replacement when the lower membrane column and the upper membrane cover of the automatic membrane-changing air intake device of the present invention are separated;

[0020] Figure 6 This is the schematic diagram of the state where the lower membrane column and the upper membrane cover of the automatic membrane-changing air intake device of the present invention press the filter membrane belt. Detailed implementation mode

[0021] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, an automatic membrane-changing air intake device of the present invention is used in the sampling system of environmental monitoring equipment, and includes more than two air intake units 03 with the same structure. Each air intake unit 03 is at the same height. Each air intake unit 03 includes an upper membrane cover 32, a lower membrane column 33, and a lower membrane column propulsion assembly. An air inlet 321 is provided on the upper membrane cover 32, and an air outlet 331 is provided on the lower membrane column 33. The upper membrane cover 32 is adapted to cover or leave the lower membrane column 33. The lower membrane column 33 is located below the upper membrane cover 32 and is vertically arranged. The filter membrane belt 37 is clamped between the lower membrane column 33 and the upper membrane cover 32 of each air intake unit 03. The lower membrane column propulsion assembly is connected to the lower membrane column 33, and the lower membrane column propulsion assembly drives the lower membrane column 33 to move upward or downward. In this embodiment, four air intake units 03 are provided.

[0022] During sample injection, the lower membrane column propulsion assembly drives the lower membrane column 33 to move upward, and the upper membrane cover 32 covers the lower membrane column 33 to clamp the filter membrane belt 37 between the lower membrane column 33 and the upper membrane cover 32. During membrane replacement, the upper membrane cover 32 is opened, the lower membrane column propulsion assembly drives the lower membrane column 33 to move downward, the lower membrane column 33 is separated from the upper membrane cover 32, the filter membrane belt 37 is moved, and the filter membrane belt clamped between the lower membrane column 33 and the upper membrane cover 32 of each air intake unit 03 moves downstream, and a new filter membrane belt enters between the lower membrane column 33 and the upper membrane cover 32 of each air intake unit 03.

[0023] The working process of the automatic membrane-changing air intake device of the present invention is as follows:

[0024] Start the lower membrane column pushing component, so that the lower membrane column pushing component drives the lower membrane column 33 to move upward. The lower membrane column 33 and the upper membrane cover 32 press the filter membrane belt 37, and the automatic membrane-changing air inlet device is in a closed state, and then start sampling. When there is a lot of dust accumulated on the filter membrane belt 37 at the sampling point and needs to be replaced after running for a period of time, start the lower membrane column pushing component, so that the lower membrane column pushing component drives the lower membrane column 33 to move downward, loosen the filter membrane belt 37 and the upper membrane cover 32, make the filter membrane belt 37 move a certain distance, and the new filter membrane belt reaches the sampling point. Then start the lower membrane column pushing component again to press the lower membrane column 33 and the upper membrane cover 32 tightly, and start sampling. Repeat the above steps whenever the filter membrane belt needs to be replaced.

[0025] In the automatic membrane-changing air inlet device of the present invention, since it includes more than two air inlet units 03, and the air inlet unit 03 includes an upper membrane cover 32, a lower membrane column 33, and a lower membrane column pushing component, and the lower membrane column pushing component can drive the lower membrane column 33 to move up and down, so it can synchronously move the lower membrane columns 33 of each air inlet unit 03 and synchronously change the membrane for each air inlet unit 03, improving the membrane-changing efficiency. Each air inlet unit 03 can be provided with multiple ones according to needs to improve the air inlet efficiency. Also, since the lower membrane column 33 is driven to move up and down by the lower membrane column pushing component, automatic membrane changing can be realized by controlling the lower membrane column pushing component.

[0026] Optionally, the air inlet unit 03 further includes a membrane cover connecting plate 31. The upper membrane cover 32 is connected to the membrane cover connecting plate 31. One end of the membrane cover connecting plate 31 is hinged to the bracket 30, and the membrane cover connecting plate 31 is adapted to drive the upper membrane cover 32 to rotate to open or close the upper membrane cover 32. Specifically, the membrane cover connecting plate 31 is hinged to the moving template of the bracket 30, and the membrane cover connecting plate 31 is connected to the moving template of the bracket 30 through the upper cover fixing screw 323. Just disassemble the upper cover fixing screw 323 when changing the membrane.

[0027] Optionally, the lower membrane column pushing component includes a push rod 341, a fork 342, and a fork mounting block 343. The fork mounting block 343 is located on one side of the lower membrane column 33, and the fork mounting block 343 is connected to the bracket 30. A through hole 334 is provided at the bottom of the lower membrane column 33, and the through hole 334 is arranged along the radial direction of the lower membrane column 33. The push rod 341 is vertically arranged. One end of the fork 342 is hinged to the top of the push rod 341, and the other end extends into the through hole 334. The middle part of the fork 342 is rotatably connected to the fork mounting block 343. When the push rod 341 moves upward, the fork 342 drives the lower membrane column 33 to move downward. When the push rod 341 moves downward, the fork 342 drives the lower membrane column 33 to move upward. Specifically, the bottom of the push rod 341 is connected to the push rod support 345, and the middle part of the fork 342 is connected to the fork mounting block 343 through a bearing. As Figure 5As shown, when the membrane needs to be replaced, the push rod 341 is moved upward, the lower membrane column 33 is pressed down by the fork 342, and the upper membrane cover 32 is rotated to move the filter membrane belt 37 forward. When the old filter membrane belt leaves the sampling position and the new filter membrane belt moves into place, the push rod 341 is moved downward to drive the lower membrane column 33 upward. The lower membrane column 33 and the upper membrane cover 32 re-press the filter membrane belt, as Figure 6 shown. The push rod 341 and the fork 342 drive the lower membrane column 33 to move up and down, with a simple structure and convenient operation.

[0028] Optionally, as Figure 1 shown, the air inlet unit 03 further includes a pressure spring 35 and a lower membrane guide cylinder 36. The outer wall of the lower membrane column 33 is stepped. A part of the lower membrane column 33 is arranged inside the lower membrane guide cylinder 36. The bottom of the lower membrane column 33 passes through the lower membrane guide cylinder 36 and extends outside the lower membrane guide cylinder 36. The lower membrane column 33 is adapted to move up and down relative to the lower membrane guide cylinder 36. The pressure spring 35 is sleeved on the small-diameter part of the lower membrane column 33. The upper end of the pressure spring 35 abuts against the outer wall boss of the lower membrane column 33, and the lower end abuts against the bottom of the lower membrane guide cylinder 36. When the lower membrane column 33 moves upward for sampling, the elastic force of the pressure spring 35 acts on the lower membrane column 33, further pressing the filter membrane belt 37 tightly by the lower membrane column 33 and the upper membrane cover 32, enhancing the sealing performance of the air inlet unit.

[0029] Optionally, the air inlet unit 03 further includes a sealing ring 38. The sealing ring 38 is arranged between the upper membrane cover 32 and the lower membrane column 33, and the sealing ring 38 is an O-ring.

[0030] Optionally, the air inlet unit 03 further includes an air inlet nozzle 322 and an air outlet nozzle 332. The air inlet nozzle 322 is arranged on the air inlet 321, and the air outlet nozzle 332 is arranged on the air outlet 331. During sampling, the sampled gas enters the filter membrane belt unit through the air inlet nozzle 322, and after being filtered by the filter membrane belt, it enters the monitoring device through the air outlet nozzle 332.

[0031] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An automatic film-changing air intake device, characterized in that: The invention comprises two or more air intake units (03) of the same structure, each of the air intake units (03) is located at the same height, the air intake unit (03) comprises an upper membrane cover (32), a lower membrane column (33), and a lower membrane column pushing assembly, the upper membrane cover (32) is provided with an air inlet (321), the lower membrane column (33) is provided with an air outlet (331), the upper membrane cover (32) is suitable for covering the lower membrane column (33) or leaving the lower membrane column (33), the lower membrane column (33) is located below the upper membrane cover (32), the lower membrane column (33) is vertically arranged, a filter membrane belt (37) is clamped between the lower membrane column (33) and the upper membrane cover (32) of each of the air intake units (03), the lower membrane column pushing assembly is connected to the lower membrane column (33), and the lower membrane column pushing assembly The lower membrane column (33) is driven to move upward or downward. When injecting a sample, the lower membrane column pushing assembly drives the lower membrane column (33) to move upward, and the upper membrane cover (32) is covered on the lower membrane column (33) to clamp the filter membrane belt (37) between the lower membrane column (33) and the upper membrane cover (32). When changing the membrane, the upper membrane cover (32) is opened, and the lower membrane column pushing assembly drives the lower membrane column (33) to move downward. The lower membrane column (33) is separated from the upper membrane cover (32), and the filter membrane belt (37) is moved. The filter membrane belt clamped between the lower membrane column (33) and the upper membrane cover (32) of each of the air inlet units (03) moves downstream, and a new filter membrane belt enters between the lower membrane column (33) and the upper membrane cover (32) of each of the air inlet units (03).

2. The automatic film-changing air intake device according to claim 1 is characterized in that: The air intake unit (03) further comprises a bracket (30) and a membrane cover connecting plate (31), the upper membrane cover (32) being connected to the membrane cover connecting plate (31), one end of the membrane cover connecting plate (31) being hinged to the bracket (30), and the membrane cover connecting plate (31) being suitable for driving the upper membrane cover (32) to rotate.

3. The automatic film-changing air intake device according to claim 2 is characterized in that: The lower membrane column pushing assembly comprises a push rod (341), a shift fork (342), and a shift fork mounting block (343); the shift fork mounting block (343) is located on one side of the lower membrane column (33); the shift fork mounting block (343) is connected to the bracket (30); a through hole (334) is provided at the bottom of the lower membrane column (33); the through hole (334) is provided along the radial direction of the lower membrane column (33); the push rod (341) is vertically provided; One end of the shift fork (342) is hinged to the top of the push rod (341), and the other end extends into the through hole (334). The middle part of the shift fork (342) is rotatably connected to the shift fork mounting block (343). When the push rod (341) moves upward, the shift fork (342) drives the lower membrane column (33) to move downward. When the push rod (341) moves downward, the shift fork (342) drives the lower membrane column (33) to move upward.

4. The automatic film-changing air intake device according to claim 3 is characterized in that: The middle portion of the shift fork (342) is connected to the shift fork mounting block (343) via a bearing.

5. The automatic film-changing air intake device according to claim 1 is characterized in that: The air intake unit (03) also includes a pressure spring (35) and a lower membrane guide tube (36). The outer wall of the lower membrane column (33) is stepped. Part of the lower membrane column (33) is arranged in the lower membrane guide tube (36). The bottom of the lower membrane column (33) passes through the lower membrane guide tube (36) and extends out of the lower membrane guide tube (36). The lower membrane column (33) is suitable for moving up and down relative to the lower membrane guide tube (36). The pressure spring (35) is sleeved on the small diameter part of the lower membrane column (33). The upper end of the pressure spring (35) abuts against the outer wall boss of the lower membrane column (33) and the lower end abuts against the bottom of the lower membrane guide tube (36).

6. The automatic film-changing air intake device according to claim 1, characterized in that: The air intake unit (03) further comprises a sealing ring (38), wherein the sealing ring (38) is arranged between the upper membrane cover (32) and the lower membrane column (33).

7. The automatic film-changing air intake device according to claim 1 is characterized in that: The air intake unit (03) further comprises an air intake nozzle (322) and an air outlet nozzle (332), wherein the air intake nozzle (322) is arranged on the air intake port (321), and the air outlet nozzle (332) is arranged on the air outlet port (331).

Images