Sampling assembly with sampling film automatic falling-off device and all-in-one machine with sampling assembly

Abstract

The utility model discloses a sampling assembly with a sampling membrane automatic falling-off device and an all-in-one machine with the sampling assembly, the all-in-one machine comprises the sampling assembly, a membrane fork assembly, a weighing assembly, a large disc assembly and a case assembly, the membrane fork assembly is used for conveying a sampling membrane among the sampling assembly, the weighing assembly and the large disc assembly, and the case assembly is used for conveying the sampling membrane among the case assembly. And automatic sampling of the sampling film is realized. The sampling assembly comprises a lifting table, a sampling head, a transmission assembly and a supporting rod, the supporting rod is used for placing a sampling film, a film support matched with the sampling film is arranged on the lifting table, and after the transmission assembly drives the lifting table to ascend, the lifting table and the sampling head are closed for sampling of the sampling film; a separation assembly is arranged in the open pore, so that the sampling film can be separated from the sampling head. The utility model can effectively solve the problem that the sampling head and the sampling film cannot be separated, and has the advantages of accurate sampling and high automation degree.

Description

Technical Field

[0001] The utility model relates to environmental protection gas detection, in particular to a sampling component with an automatic sampling film shedding device and an integrated machine with the sampling component. Background Art

[0002] Atmospheric particulate matter is an important pollutant in the environment, and its content in the atmosphere needs to be monitored. When monitoring the content of particulate matter in the air, the particulate matter in the air is usually sampled through a sampler, and then the filter membrane in the sampler is taken out and placed in a weighing device, and the filter membrane is weighed after standing in the weighing device for a certain period of time. However, since the existing sampler and weighing device are independently set up, it is necessary to manually move the sampled filter membrane in the sampler to the weighing device, which consumes a lot of manual time.

[0003] At present, most of the sampling in the automatic monitoring / analysis instruments of environmental particulate matter is mostly carried out by using polytetrafluoroethylene organic filter membrane to adsorb particulate matter and then weigh it, so as to obtain the content of particulate matter through analysis and realize the monitoring of atmospheric particulate matter. The prior art is as follows: invention patent application publication number: CN117606974A, utility model: authorization announcement number: CN209745761U and CN209979435U. However, the common problem of this technology is that the automation equipment is not perfect enough and cannot realize automatic weighing sampling well. During sampling, because the filter membrane is light (blank filter membrane weighs 150mg), after the sampling is completed, due to the high air humidity or the large temperature difference between the inside and outside, the water vapor in the sampling tube will cause the filter membrane to be adsorbed on the sampling head and cannot fall off automatically. Therefore, the sampling mechanism cannot extract the filter membrane, resulting in subsequent weighing failure. During the sampling process, because the filter membrane is too thin, the lifting platform is easy to collide with the sampling head during the rising process, resulting in damage to the sampling head; and due to the cost problem, it is not practical to set sensors on the lifting platform and the sampling head. Utility Model Content

[0004] The technical problem to be solved by the utility model is that, in view of the problems that the existing sampling equipment has insufficient automation, insufficient detail processing, inaccurate filter membrane sampling, difficulty in separating the filter membrane from the sampling head, and easy failure due to the influence of water vapor during the sampling process, a sampling component with an automatic shedding device for the sampling membrane and an all-in-one machine with the sampling component are provided.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a sampling component with an automatic shedding device for a sampling film, which includes:

[0006] Lifting platform;

[0007] A sampling head that matches the lifting platform;

[0008] A transmission assembly for driving the lifting platform to rise and fall;

[0009] A support rod for placing the sampling membrane;

[0010] The lifting platform is arranged on the outer periphery of the support rod, and a supporting part for cooperating with the sampling membrane is arranged on the lifting platform;

[0011] After the transmission assembly drives the lifting platform to rise, the lifting platform is sealed with the sampling head, and the upper surface of the supporting part is higher than the top of the support rod and close to the sampling port of the sampling head; after the transmission assembly drives the lifting platform to descend, the upper surface of the supporting part is lower than the top of the support rod;

[0012] The sampling port is provided with an opening, and a separation component is provided in the opening, and the separation component includes an elastic member and a top column, and the top column is connected to the opening through the elastic member and extends out of the lower surface of the sampling port, and the position of the top column is opposite to the supporting part. By providing a support rod, the placement of the sampling membrane is facilitated; the sampling membrane is matched with the sampling head by lifting the lifting platform; and by providing a separation component, it is ensured that the sampling membrane and the sampling head can be separated smoothly after sampling.

[0013] As a further optimization scheme of the utility model, the supporting part includes a membrane support, and the membrane support is provided with airflow holes for gas circulation and through holes for allowing the support column to pass through, and the diameter of the airflow holes is larger than the diameter of the membrane holes of the sampling membrane. By providing the membrane support, it is ensured that the sampling membrane will not be damaged due to excessive airflow during sampling, and by providing the airflow holes, it is ensured that the gas passes smoothly during sampling. At the same time, by providing the through holes, the membrane support will pass through the top of the support rod when the lifting platform descends, so that the sampling membrane is separated from the membrane support, which is convenient for the subsequent removal of the sampling membrane.

[0014] To further optimize the solution, after the transmission assembly drives the lifting platform to rise, the upper surface of the membrane support is higher than the top of the support rod, and the lower surface of the membrane support is lower than the top of the support rod. Through the height coordination between the membrane support and the support rod, it is ensured that the support rod will not affect the sampling process during sampling, and the membrane support will not fall off the support rod, and the support rod is always in coordination with the through hole of the membrane support.

[0015] As a further optimization solution of the utility model, the separation assembly also includes a stud for adjusting the distance that the top column extends from the lower surface of the sampling port, the stud is rotatably connected in the opening, and the elastic member is arranged between the stud and the top column. By setting the stud, the distance that the top column pops out can be adjusted, the force applied by the top column can be guaranteed, and the sampling membrane can be ensured not to be damaged due to excessive force and can be separated from the sampling head.

[0016] As a further optimization solution of the utility model, the surface of the top column extending out of the lower surface of the sampling port is spherical. By setting the spherical surface, the top column is prevented from piercing the sampling membrane.

[0017] As a further optimization scheme of the utility model, it also includes a guide shaft and a buffer. The transmission assembly is installed on the guide shaft, and the transmission assembly is connected to the lifting platform through the buffer. A support plate is fixed to the upper end of the guide shaft, and the support plate is located inside the lifting platform and fits with the inner circle of the lifting platform. The support rod is set on the support plate. By setting the buffer, the impact of the sampling head and the lifting platform when in contact is prevented, which may cause damage to the sampling head. The support plate is located inside the lifting platform and fits with the inner circle of the lifting platform. In addition to fixing the support rod, it also guides the lifting of the lifting platform. The cooperation of the above-mentioned guide shaft, buffer and lifting platform also eliminates the need for sensors, which can effectively save costs.

[0018] To further optimize the solution, a drainage hole is provided on the support plate to prevent water accumulation inside the lifting platform.

[0019] As a further optimization scheme of the utility model, the sampling port protrudes downward, the lifting platform is provided with a recessed portion to match the sampling port, and the matching position of the sampling port and the recessed portion is arc-shaped transition. By providing an arc-shaped transition edge between the sampling port and the recessed portion, it is ensured that the lifting platform and the sampling head can be closed smoothly.

[0020] An all-in-one machine with an automatic sampling membrane shedding device, which also includes a membrane fork assembly, a weighing assembly, a large plate assembly, and a chassis assembly. The sampling assembly, the membrane fork assembly, the weighing assembly, and the large plate assembly are installed on the chassis assembly, and the membrane fork assembly is used to transfer the sampling membrane between the sampling assembly, the weighing assembly, and the large plate assembly.

[0021] In a further optimized solution, the number of support rods is at least three and they are not in the same straight line, and the interval between at least one set of adjacent support rods allows the membrane fork assembly to enter. By setting two support rods with a larger interval than the membrane fork, it is ensured that the membrane fork can smoothly extract the sampling membrane.

[0022] Beneficial effects:

[0023] The placement of the sampling membrane is facilitated by providing a support rod.

[0024] The sampling membrane is matched with the sampling head by lifting the lifting platform.

[0025] By setting up a separation component, it is ensured that the sampling membrane and the sampling head can be separated smoothly after sampling.

[0026] By setting up a membrane holder, it is ensured that the sampling membrane will not be damaged due to excessive airflow during sampling. By setting up air flow holes, it is ensured that gas can pass smoothly during sampling. At the same time, a through hole is set. When the lifting platform descends, the membrane holder will pass through the top of the support rod, so that the sampling membrane is separated from the membrane holder, making it convenient to remove the sampling membrane later.

[0027] The height coordination between the membrane holder and the support rod ensures that the support rod will not affect the sampling process during sampling, and the membrane holder will not fall off the support rod, and the support rod is always in coordination with the through hole of the membrane holder.

[0028] By setting the stud, the distance that the top column pops out can be adjusted to ensure the force applied by the top column, thereby ensuring that the sampling membrane will not be damaged due to excessive force and can be separated from the sampling head.

[0029] The spherical surface is provided to prevent the top column from piercing the sampling membrane.

[0030] By providing a buffer, the sampling head is prevented from being impacted when in contact with the lifting platform, which may cause damage to the sampling head; the support plate is located inside the lifting platform and fits with the inner circle of the lifting platform, and in addition to fixing the support rod, it also serves to guide the lifting of the lifting platform; the coordination of the guide shaft, buffer and lifting platform also eliminates the need for sensors, which can effectively save costs.

[0031] By setting up a drain outlet, water accumulation inside the lifting platform can be prevented.

[0032] By arranging arc-shaped transition edges between the sampling port and the recessed portion, it is ensured that the lifting platform and the sampling head can be closed smoothly.

[0033] By setting two support rods with a spacing greater than that of the membrane fork, it is ensured that the membrane fork can smoothly extract the sampling membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of an integrated machine with an automatic sampling film shedding device of the utility model;

[0035] Figure 2 This is a schematic diagram of the internal structure of the integrated machine with an automatic sampling film shedding device of the utility model;

[0036] Figure 3 This is a schematic diagram of the closed state of the sampling head and the lifting platform of the sampling assembly with the automatic sampling film shedding device of the utility model;

[0037] Figure 4 This is a schematic diagram of the separation of the sampling head and the lifting platform of the sampling assembly with the automatic sampling film shedding device of the utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the sampling head of the utility model;

[0039] Figure 6 This is an internal cross-sectional view of the integrated machine with an automatic sampling film shedding device of the utility model;

[0040] Figure 7 This is a schematic diagram of the membrane support structure of the utility model;

[0041] 1-lifting platform, 2-sampling head, 3-transmission assembly, 4-support rod, 5-guide shaft, 6-membrane fork assembly, 7-weighing assembly, 8-large plate assembly, 9-chassis assembly, 11-supporting part, 21-sampling port, 31-buffer, 51-support plate, 111-membrane support, 112-air flow hole, 113-through hole, 211-opening, 212-elastic part, 213-top column, 214-stud, 121-drain outlet. DETAILED DESCRIPTION

[0042] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0043] Example 1

[0044] like Figure 1 , Figure 2 , Figure 6 The all-in-one machine with an automatic sampling membrane shedding device shown includes a sampling component, a membrane fork component 6, a weighing component 7, a large plate component 8, and a chassis component 9. The sampling component, the membrane fork component 6, the weighing component 7, and the large plate component 8 are installed on the chassis component 9, and the membrane fork component 6 is used to transfer the sampling membrane between the sampling component, the weighing component 7, and the large plate component 8.

[0045] The blank sampling membrane is first placed on the large plate assembly 8 for balancing, and then placed on the weighing assembly 7 for weighing through the membrane fork assembly 6. After the weighing is completed, the membrane fork assembly 6 is placed on the sampling assembly with the blank sampling membrane to sample the atmospheric particulate matter. After the sampling is completed, the membrane fork assembly 6 sends the sampling membrane to the large plate assembly 8 for balancing. After balancing for a certain period of time, the sampling membrane is transported to the weighing assembly 7 for weighing through the membrane fork assembly 6. By comparing the two sets of weighing data, the concentration data of the particulate matter can be obtained.

[0046] A sampling assembly with an automatic sampling membrane shedding device, such as Figure 3 , Figure 4As shown, it includes a lifting platform 1, a sampling head 2 matched with the lifting platform 1, a transmission component 3 for driving the lifting platform 1 to lift, a support rod 4 for placing a sampling film, a guide shaft 5, and a buffer 31. The sampling head 2 is arranged on the chassis component 9. In this embodiment, the sampling head is fixed. The lifting platform 1 is installed on the transmission component 3 and driven to lift by the transmission component 3. The transmission component 3 is installed on the guide shaft 5 and guided by the guide shaft. The transmission component 3 is connected to the lifting platform 1 through a buffer 31. By setting the buffer 31, it can effectively avoid damage to the machine when the lifting platform 1 contacts the sampling head. The buffer can be selected from springs. The lifting platform 1 is a hollow structure, and the support rod 4 is arranged inside the lifting platform 1. The support rod 4 is used to support the sampling film. A supporting portion 11 for matching the sampling film is provided on the lifting platform 1. At the same time, the position of the supporting portion 11 matches the sampling port 21 of the sampling head 2.

[0047] When the transmission assembly 3 drives the lifting platform 1 to rise, the supporting part 11 is close to the sampling port 21 of the sampling head 2 to form a closed space, and the sampling membrane is located in the closed space for sampling; at this time, the upper surface of the supporting part 11 is higher than the top of the support rod 4; when the transmission assembly 3 drives the lifting platform 1 to descend, the upper surface of the supporting part 11 is lower than the top of the support rod 4.

[0048] like Figure 5 As shown, in order to ensure that the sampling membrane can be smoothly separated from the sampling port 21 after sampling, an opening 211 is provided on the sampling port 21, and a separation component is provided in the opening 211, and the separation component includes an elastic member 212 and a top column 213, and the top column 213 is connected to the opening 211 through the elastic member 212 and extends out of the lower surface of the sampling port 21, and the position of the top column 213 is opposite to the supporting portion 11. When the sampling is completed, the sampling head is separated from the lifting platform, and the top 213 pushes the sampling membrane downward under the action of the elastic member 212, so as to separate the sampling membrane from the sampling head, thereby avoiding the problem that the sampling membrane cannot be separated from the sampling head due to water vapor. In this embodiment, the elastic member is a spring.

[0049] In this embodiment, the supporting portion 11 further includes a film support 111. Figure 7 As shown, the membrane holder is used to place the sampling membrane, and the membrane holder 111 is provided with an air flow hole 112 for gas circulation and a through hole 113 for allowing the support column 4 to pass through, and the diameter of the air flow hole 112 is larger than the membrane hole diameter of the sampling membrane. When the transmission component 3 drives the lifting platform 1 to rise, the upper surface of the membrane holder 111 is higher than the top of the support rod 4, and the lower surface of the membrane holder 111 is lower than the top of the support rod 4.

[0050] A support plate 51 is fixed to the upper end of the guide shaft 5. The support plate 51 is located inside the lifting platform 1 and fits with the inner circle of the lifting platform 1 to play a guiding role. In this embodiment, the support rod 4 is arranged on the support plate 51 and its position remains fixed. In order to prevent water vapor from being unable to be discharged and accumulating inside the lifting platform, a drain port 121 is provided on the support plate 41, and the accumulated water is discharged from the drain port 121, thereby avoiding the problem of water accumulation inside the lifting platform.

[0051] During operation, the blank sampling membrane is first transferred from the large plate assembly 8 to the weighing assembly 7 for weighing. After the weighing is completed, the membrane fork assembly 6 is placed on the support rod 4. Before the blank sampling membrane reaches the sampling station, the sampling head 2 and the lifting platform 1 are separated by a certain distance, and the support rod 4 is higher than the lifting platform plane 2, which is convenient for the sampling membrane to be placed in; after the blank sampling membrane is placed on the support rod 4, the lifting platform 1 moves up under the action of the transmission assembly, and the membrane holder 111 supports the blank sampling membrane to rise. The lifting platform 1 cooperates with the sampling head 2 to form a closed space. At this time, the sampling membrane is pressed Below the sampling head 2, the outside air is then sucked into the sampling pipe through the surface of the sampling membrane under the action of the air pump. After the sampling time is completed, the lifting platform 1 descends, the enclosed space opens, and the top column 213 below the sampling head 2 is subjected to the force of the elastic member 212 to press down the edge of the sampling membrane, thereby easily separating the sampling membrane from the sampling head 2, and then the sampling membrane successfully falls onto the membrane holder 111, and then the membrane holder 111 passes through the support rod 4, the sampling membrane stays on the support rod 4, and then is sent to the weighing assembly 7 for weighing via the membrane fork assembly 6 to complete the automatic collection and analysis of particulate matter.

[0052] Example 2

[0053] A sampling assembly with an automatic sampling membrane shedding device as shown in Example 1 is characterized in that the separation assembly also includes a stud 214, which is rotatably connected in the opening 211, and an elastic member 212 is arranged between the stud 214 and the top column 213. When the top column 213 is not ejected far enough, the sampling membrane cannot be separated from the sampling head. Therefore, by setting the stud 214, the distance of the top column 213 ejecting the opening 211 can be adjusted by the stud 214 to achieve the separation of the sampling membrane from the sampling head.

[0054] Example 3

[0055] As shown in Example 1, a sampling assembly with an automatic sampling film shedding device has the following distinguishing feature: in order to ensure that the sampling head 2 and the lifting platform 1 can be closed smoothly during operation, in this embodiment, the lower protruding structure of the sampling port 2 and the concave portion on the lifting platform 1 that matches the sampling port 21 are arranged in an arc transition, thereby avoiding the problem that the sampling port and the lifting platform cannot be closed due to slight deviations. At the same time, the arc transition can reduce the probability of damage to the sampling head and the lifting platform when they are closed, thereby extending the service life. A sealing ring is also arranged at the outer ring position where the sampling head 2 and the lifting platform 1 match to help seal.

[0056] Example 4

[0057] A sampling assembly with an automatic sampling membrane shedding device as shown in Example 1 is characterized in that the support rod 4 is used to support the membrane holder. Therefore, in order to ensure that the membrane holder can be stably placed on the support rod, the number of support rods 4 is at least three, and they are not in the same straight line, and the interval between at least one group of adjacent support rods 4 allows the membrane fork assembly 6 to enter. The membrane fork assembly 6 can smoothly place the sampling membrane on the support rod 4 or take it away for weighing through the lifting action.

[0058] Example 5

[0059] A sampling assembly with an automatic sampling film shedding device as shown in Example 1 has the distinguishing feature that, in this embodiment, a transmission mechanism that can drive the sampling head to rise and fall is provided on the sampling head, and the lifting platform rises while the sampling head descends to form a closed space, and the upper surface of the supporting part is flush with the top of the support rod during sampling. In order to prevent the sampling head and the lifting platform from being squeezed and damaged due to excessive displacement, a pressure sensor can be provided at the contact point between the sampling head and the lifting platform, and when the pressure reaches a certain value, it indicates that the closure is completed.

[0060] Example 6

[0061] As shown in Example 1, a sampling assembly with an automatic sampling film shedding device has the following distinguishing features: the transmission assembly 3 includes a fixed plate, a motor, a transmission shaft, a lifting block, and a guide rail; the fixed plate is fixed to the chassis assembly; the motor and the guide rail are mounted on the fixed plate; the motor is connected to the lifting block through the transmission shaft; the lifting block is mounted on the guide rail and the guide shaft for guiding. The transmission assembly 3 makes the lifting platform more stable during the lifting process.

[0062] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. A sampling assembly with an automatic sampling membrane shedding device, characterized in that: include: Lifting platform (1); A sampling head (2) matched with the lifting platform (1); A transmission assembly (3) for driving the lifting platform (1) to move upward and downward; A support rod (4) for placing the sampling membrane; The lifting platform (1) is arranged on the outer periphery of the support rod (4), and a supporting portion (11) for cooperating with the sampling membrane is arranged on the lifting platform (1); After the transmission component (3) drives the lifting platform (1) to rise, the lifting platform (1) and the sampling head (2) are sealed, and the upper surface of the supporting part (11) is not lower than the top of the support rod (4) and is close to the sampling port (21) of the sampling head (2); after the transmission component (3) drives the lifting platform (1) to descend, the upper surface of the supporting part (11) is lower than the top of the support rod (4); An opening (211) is provided on the sampling port (21), and a separation component is provided in the opening (211), wherein the separation component comprises an elastic member (212) and a top column (213), wherein the top column (213) is connected to the opening (211) via the elastic member (212) and extends out of the lower surface of the sampling port (21), and the position of the top column (213) is opposite to the supporting portion (11).

2. The sampling assembly with the automatic sampling membrane shedding device according to claim 1, characterized in that: The supporting portion (11) comprises a membrane support (111), the membrane support (111) is provided with an air flow hole (112) for gas circulation and a through hole (113) for allowing the support rod (4) to pass through, and the diameter of the air flow hole (112) is larger than the membrane hole diameter of the sampling membrane.

3. The sampling assembly with the automatic sampling membrane shedding device according to claim 2, characterized in that: After the transmission component (3) drives the lifting platform (1) to rise, the upper surface of the membrane support (111) is higher than the top of the support rod (4), and the lower surface of the membrane support (111) is lower than the top of the support rod (4).

4. The sampling assembly with the automatic sampling membrane shedding device according to claim 1, characterized in that: The separation assembly further comprises a stud (214) for adjusting the distance that the top column (213) extends from the lower surface of the sampling port (21); the stud (214) is rotatably connected in the opening (211); and the elastic member (212) is disposed between the stud (214) and the top column (213).

5. The sampling assembly with the automatic sampling membrane shedding device according to claim 1, characterized in that: The surface of the top column (213) extending out of the lower surface of the sampling port (21) is spherical.

6. The sampling assembly with the automatic sampling membrane shedding device according to claim 1, characterized in that: The utility model also comprises a guide shaft (5) and a buffer member (31), wherein the transmission assembly (3) is mounted on the guide shaft (5), and the transmission assembly (3) is connected to the lifting platform (1) via the buffer member (31); a support plate (51) is fixed to the upper end of the guide shaft (5), the support plate (51) is located inside the lifting platform (1) and is in contact with the inner circle of the lifting platform (1), and the support rod (4) is arranged on the support plate (51).

7. The sampling assembly with the automatic sampling membrane shedding device according to claim 6, characterized in that: A drainage port (121) is provided on the support plate (51).

8. The sampling assembly with the automatic sampling membrane shedding device according to claim 1, characterized in that: The sampling port (21) protrudes downwards, and the lifting platform (1) is provided with a recessed portion cooperating with the sampling port (21), and the cooperating positions of the sampling port (21) and the recessed portion are in an arc-shaped transition.

9. An all-in-one machine with an automatic sampling film shedding device, characterized in that: The sampling component comprises the sampling membrane automatic shedding device as described in any one of claims 1 to 8, and also comprises a membrane fork component (6), a weighing component (7), a large plate component (8), and a chassis component (9), wherein the sampling component, the membrane fork component (6), the weighing component (7), and the large plate component (8) are installed on the chassis component (9), and the membrane fork component (6) is used to transfer the sampling membrane between the sampling component, the weighing component (7), and the large plate component (8).

10. The integrated machine with the automatic sampling film shedding device according to claim 9, characterized in that: The number of the support rods (4) is at least three and they are not in the same straight line, and the interval between at least one group of adjacent support rods (4) allows the membrane fork assembly (6) to enter.

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