Improved occupational health sampler

Abstract

The utility model provides an improved occupational health sampler and belongs to the technical field of samplers. Comprising an auxiliary sleeve and a collection cylinder, the air inlet end of the collection cylinder is sleeved with the auxiliary sleeve, the auxiliary sleeve is rotationally connected with the collection cylinder, the auxiliary sleeve is used for opening or closing the air inlet end of the collection cylinder, and the collection cylinder is used for collecting and storing samples; a first air inlet is formed in the auxiliary sleeve, a second air inlet is formed in the collecting cylinder, the first air inlet corresponds to the second air inlet in position, the position of the first air inlet is far away from the central axis of the auxiliary sleeve, and the position of the second air inlet is far away from the central axis of the collecting cylinder. Through the arrangement of the auxiliary sleeve, the collection cylinder, the first air inlet and the second air inlet and the cooperation with the structure of the spring, the ball body and the positioning hole in the auxiliary ring, the function of opening or closing the air inlet end of the collection cylinder is achieved.

Description

Technical Field

[0001] This utility model relates to the field of sampler technology, and in particular to an improved occupational health sampler. Background Technology

[0002] In occupational health monitoring, accurate air sampling is crucial for assessing hazardous factors in the work environment. As a key piece of equipment, the performance of occupational health samplers directly impacts the reliability of sampling results.

[0003] However, existing occupational health samplers are not convenient and efficient enough in terms of gas intake and sealing during the gas collection process. It is difficult to quickly and accurately control the gas entry and blockage, which can easily lead to sample leakage or the introduction of external interfering gases during the sampling process, affecting the accuracy and reliability of the sample. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an improved occupational health sampler, thereby solving the technical problems mentioned in the background art.

[0005] Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: An improved occupational health sampler includes an auxiliary sleeve and a collection tube. The auxiliary sleeve is fitted onto the air inlet end of the collection tube and is rotatably connected to the collection tube. The auxiliary sleeve is used to open or close the air inlet end of the collection tube, and the collection tube is used to collect and preserve samples. The auxiliary sleeve has a first air inlet, and the collection tube has a second air inlet, with the first and second air inlets corresponding to each other. The first air inlet is located away from the central axis of the auxiliary sleeve, and the second air inlet is located away from the central axis of the collection tube. An auxiliary ring is provided around the collection tube below the auxiliary sleeve. The auxiliary ring also has a through hole, and a spring and a ball are provided in the through hole. The ball is located at the end of the spring closer to the auxiliary sleeve, while a set screw is provided in the through hole at the end of the spring away from the ball for control. The spring compression degree is such that the auxiliary sleeve and the auxiliary ring contact surface have at least two positioning holes, which are used to accommodate the ball, and can accommodate up to half of the ball. The positioning holes are used to limit the rotation angle of the auxiliary sleeve. The rotational connection between the auxiliary sleeve and the collection tube can be achieved through components such as bearings, which can ensure the smooth rotation of the auxiliary sleeve. When the air inlet end of the auxiliary sleeve is open, external gas can enter the collection tube through the first air inlet and the second air inlet. When closed, the gas is blocked from entering by the misalignment of the two. The spring and the ball in the auxiliary ring cooperate to play a positioning and limiting role during the rotation of the auxiliary sleeve. The set screw can adjust the spring compression degree according to actual needs, thereby adjusting the tightness of the ball's positioning on the auxiliary sleeve. The contact surface between the auxiliary sleeve and the air inlet end of the collection tube can be made of silicone material to ensure the sealing of the second air inlet.

[0006] In a further embodiment, the auxiliary sleeve and the auxiliary ring are respectively provided with a first reference notch and a second reference notch. The first reference notch and the second reference notch are used to compare the positions of the first air inlet and the second air inlet. The shapes of the first reference notch and the second reference notch should be easy to identify, such as using regular shapes such as triangles or rectangles. The width of the two notches should be no less than 5mm and the depth should be no less than 3mm to ensure clear observation under different lighting conditions. The edges of the notches should be chamfered to avoid scratching the operator.

[0007] In a further embodiment, a piston block is slidably provided inside the collection tube. The piston block is used to draw samples into the collection tube or push samples out of the collection tube. A sealing structure, such as a rubber sealing ring, should be provided between the piston block and the inner wall of the collection tube. The material of the sealing structure should have good chemical stability and corrosion resistance to adapt to different sampling samples. The size of the piston block should be precisely matched with the internal size of the collection tube, and the gap between the two should be controlled between 0.1-0.3 mm to ensure good sealing effect and sliding performance.

[0008] In a further embodiment, the piston block is provided with a sleeve, and a threaded rod is provided inside the sleeve. The sleeve and the threaded rod are threadedly connected. The threaded rod is used to control the movement of the piston block within the sampling cylinder through the sleeve. The thread type of the threaded rod should be a trapezoidal thread or a sawtooth thread to improve transmission efficiency and load-bearing capacity. The thread pitch should be reasonably set according to the sampling accuracy requirements, generally between 1-3 mm. The inner wall of the sleeve should be precision machined, and the surface roughness should not exceed Ra1.6 μm to ensure a good fit with the threaded rod.

[0009] In a further embodiment, a limiting bracket is provided inside the collection tube. The limiting bracket is located outside the sleeve and is used to prevent the sleeve and piston block from rotating with the threaded rod. The function of the limiting bracket is to restrict the rotational freedom of the sleeve and piston block, so that they can only move axially inside the collection tube. The limiting bracket can be made of metal or plastic and is fixed inside the collection tube by welding, bolting or other methods.

[0010] In a further embodiment, a support rod is provided at the end of the collection cylinder away from the auxiliary sleeve, and a base plate is provided at the end of the support rod away from the collection cylinder. The threaded rod passes through the base plate at the end away from the piston block. The number of support rods should be no less than three, and they should be evenly distributed around the collection cylinder. The material of the support rods should have high strength and rigidity, such as aluminum alloy or stainless steel, and its tensile strength should be no less than 300 MPa. A sealing and support structure, such as bearings and sealing rings, should be provided between the threaded rod and the base plate to ensure the rotational accuracy and sealing performance of the threaded rod.

[0011] In a further embodiment, a drive source is installed on the side of the base plate away from the support rod. The output end of the drive source is connected to the threaded rod. The drive source is used to drive the threaded rod to rotate. The drive source can be a power device such as a motor, which is connected to the threaded rod through an output shaft to transmit power to the threaded rod to make it rotate. The selection of the drive source should be determined according to the working requirements and usage scenarios of the sampler, and it needs to have sufficient torque and speed adjustment range.

[0012] In a further embodiment, a base block is detachably installed on the side of the base plate away from the support rod. The base block is fitted around the drive source and is used to protect the drive source. The base block should be made of a material with good protective performance, such as engineering plastic or metal, and should undergo surface treatment, such as painting or electroplating, to improve its corrosion resistance and wear resistance. The connection between the base block and the base plate should be a bolt connection or a snap-fit ​​connection. The connection should be firm and reliable and should not fall off when subjected to a certain external impact.

[0013] In a further embodiment, a storage battery is also installed within the base block. The storage battery is electrically connected to the drive source and is used to supply power to the drive source, enabling it to operate normally. When selecting a storage battery, factors such as its capacity, voltage, and service life need to be considered to meet the usage requirements of the sampler under different operating conditions. The rated voltage of the storage battery should match the operating voltage of the drive source, with the deviation controlled within ±5%. The capacity of the storage battery should ensure that the sampler can operate continuously for no less than 4 hours under full load. The storage battery should have overcharge, over-discharge, and short-circuit protection functions to improve safety during use.

[0014] In a further embodiment, the outer periphery of the collection tube is also provided with scale markings to visually display the position of the piston block inside the collection tube. The scale markings can be made on the outer surface of the collection tube by means of printing, etching, etc. The scale markings should be clear and accurate to facilitate the operator to read the position of the piston block and thus determine the volume of the collected sample.

[0015] Beneficial effects: 1. By rotating the auxiliary sleeve and the collection tube, and by setting the first air inlet on the auxiliary sleeve and the second air inlet on the collection tube accordingly, and by cooperating with the structure of the spring, ball and positioning hole in the auxiliary ring, the function of opening or closing the air inlet of the collection tube is realized; during sampling, the air inlets overlap to allow gas to enter smoothly, and after sampling, rotating the auxiliary sleeve to misalign the air inlets can effectively prevent sample leakage, thus achieving the effect of convenient control of air intake and ensuring sample sealing.

[0016] 2. By using the first and second matching notches respectively opened on the auxiliary sleeve and auxiliary ring, the position of the first and second air inlets can be directly compared. Operators do not need to use additional tools and can quickly judge the status of the air inlets by simply observing whether the notches are aligned, thus improving the convenience and accuracy of operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 for Figure 1 A schematic diagram of the main cross-section.

[0020] Figure 3 for Figure 1 A schematic diagram of the side section structure.

[0021] Figure 4 for Figure 3 A schematic diagram of the structure at point A.

[0022] The reference numerals in the figure are as follows: 1. Collection tube; 101. Scale mark; 102. First air inlet; 103. Limiting bracket; 2. Auxiliary sleeve; 201. Second air inlet; 202. First reference notch; 3. Auxiliary ring; 301. Second reference notch; 4. Support rod; 5. Base plate; 6. Base block; 7. Piston block; 701. Sleeve; 8. Threaded rod; 9. Drive source; 10. Battery; 11. Ball; 12. Spring; 13. Set screw. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in this utility model are described clearly and completely. Obviously, the described embodiments are only some, not all, of the embodiments in this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this utility model without creative effort are within the scope of protection of this utility model.

[0024] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0025] Reference Figure 1-4An improved occupational health sampler includes: an auxiliary sleeve 2 and a collection tube 1. The auxiliary sleeve 2 is fitted onto the air inlet end of the collection tube 1 and is rotatably connected to the collection tube 1. The auxiliary sleeve 2 is used to open or close the air inlet end of the collection tube 1, and the collection tube 1 is used to collect and preserve samples. The auxiliary sleeve 2 has a first air inlet 102, and the collection tube 1 has a second air inlet 201. The first air inlet 102 and the second air inlet 201 are positioned opposite each other. The first air inlet 102 is located away from the central axis of the auxiliary sleeve 2, and the second air inlet 201 is located away from the central axis of the auxiliary sleeve 2. The auxiliary sleeve 2 is located away from the central axis of the collection cylinder 1. An auxiliary ring 3 is provided around the collection cylinder 1 below the auxiliary sleeve 2. A through hole is provided in the auxiliary ring 3. A spring 12 and a ball 11 are provided in the through hole. The ball 11 is located at the end of the spring 12 closer to the auxiliary sleeve 2. A set screw 13 is provided in the through hole at the end of the spring 12 away from the ball 11 to control the compression degree of the spring 12. At least two positioning holes are provided on the contact surface between the auxiliary sleeve 2 and the auxiliary ring 3. The positioning holes are used to accommodate the ball 11 and can accommodate up to half of the ball 11. The positioning holes are used to limit the rotation angle of the auxiliary sleeve 2.

[0026] It achieves the effect of precisely controlling the opening and closing of the air inlet of the collection tube 1 by rotating the auxiliary sleeve 2. At the same time, the spring 12, ball 11 and positioning hole structure in the auxiliary ring 3 effectively limit the rotation angle of the auxiliary sleeve 2, ensuring the accuracy and stability of the air intake and sealing operation.

[0027] The auxiliary sleeve 2 and the auxiliary ring 3 are respectively provided with a first reference notch 202 and a second reference notch 301, which are used to compare the positions of the first air inlet 102 and the second air inlet 201.

[0028] This allows operators to quickly and intuitively compare the positions of the first air inlet 102 and the second air inlet 201, clearly determining the air intake status without complicated operations, thus improving the ease of operation.

[0029] A piston block 7 is slidably disposed inside the collection tube 1. The piston block 7 is used to draw samples into the collection tube 1 or push samples out of the collection tube 1.

[0030] It successfully allows samples to be drawn into or pushed out of the collection tube 1, meeting the basic operational requirements for occupational health sampling.

[0031] The piston block 7 is provided with a sleeve 701, and a threaded rod 8 is provided inside the sleeve 701. The sleeve 701 is threadedly connected to the threaded rod 8, and the threaded rod 8 is used to control the movement of the piston block 7 inside the collection cylinder 1 through the sleeve 701.

[0032] This achieves the effect of precisely controlling the movement of the piston block 7 within the collection cylinder 1 by rotating the threaded rod 8, thereby enabling precise adjustment of the sampling volume and improving sampling accuracy.

[0033] The collection cylinder 1 is provided with a limiting bracket 103, which is located around the sleeve 701. The limiting bracket 103 is used to prevent the sleeve 701 and the piston block 7 from rotating with the threaded rod 8.

[0034] This effectively prevents the sleeve 701 and piston block 7 from rotating with the threaded rod 8, ensuring that the piston block 7 moves only along the axial direction, thus guaranteeing the stability of the sampling volume control process.

[0035] The end of the collection cylinder 1 away from the auxiliary sleeve 2 is provided with a support rod 4, the end of the support rod 4 away from the collection cylinder 1 is provided with a base plate 5, and the end of the threaded rod 8 away from the piston block 7 passes through the base plate 5.

[0036] This achieves a stable support for the sampling cylinder 1, ensuring the sampler remains stable during operation and reducing the impact of shaking on the sampling results.

[0037] A drive source 9 is installed on the side of the base plate 5 away from the support rod 4. The output end of the drive source 9 is connected to the threaded rod 8, and the drive source 9 is used to drive the threaded rod 8 to rotate.

[0038] This achieves the effect of automatically rotating the threaded rod 8 by driving the drive source 9, reducing the intensity of manual operation and improving the automation level of sampling operation.

[0039] A base block 6 is detachably installed on the side of the base plate 5 away from the support rod 4. The base block 6 is sleeved around the drive source 9 and is used to protect the drive source 9.

[0040] This effectively protects the drive source 9 from damage caused by external factors, thus extending the service life of the drive source 9.

[0041] A storage battery 10 is also installed inside the base block 6. The storage battery 10 is electrically connected to the drive source 9 and is used to supply power to the drive source 9.

[0042] This achieves the effect of providing an independent power supply for the drive source 9, freeing the sampler from dependence on an external power source and enhancing its flexibility and portability.

[0043] The outer periphery of the collection tube 1 is also provided with scale markings 101, which are used to visually display the position of the piston block 7 inside the collection tube 1.

[0044] This system enables an intuitive display of the position of piston block 7 inside the sampling tube 1, facilitating accurate reading of the sampling volume by operators and improving the accuracy and traceability of sampling data.

[0045] During use, firstly, by adjusting the set screw 13 in the through hole of the auxiliary ring 3, the compression degree of the spring 12 is adjusted according to actual needs to prepare for the subsequent positioning of the auxiliary sleeve 2. Next, the auxiliary sleeve 2 is rotated so that the first air inlet 102 on the auxiliary sleeve 2 corresponds to the second air inlet 201 on the collection tube 1. At this time, the ball 11 inside the auxiliary ring 3, pushed by the spring 12, enters the positioning hole on the contact surface between the auxiliary sleeve 2 and the auxiliary ring 3, limiting the position of the auxiliary sleeve 2. External gas then enters the collection tube 1 through the first air inlet 102 and the second air inlet 201. During the collection process, the operator can observe the first control notch 202 and the second control notch 301 on the auxiliary sleeve 2 and the auxiliary ring 3 to confirm whether the first air inlet 102 and the second air inlet 201 maintain a corresponding state. After sample collection is completed, the auxiliary sleeve 2 is rotated again, causing the first air inlet 102 and the second air inlet 201 to become misaligned, thereby blocking the second air inlet 201 and preventing the sample from entering the collection tube 1. As the sample exits, the ball 11, propelled by the spring 12, enters another positioning hole, defining the new position of the auxiliary sleeve 2. During the entire sampling process, the drive source 9 is activated, and its output drives the threaded rod 8 to rotate. Since the sleeve 701 on the piston block 7 is threadedly connected to the threaded rod 8, and the sampling cylinder 1 is equipped with a limiting bracket 103 to prevent the sleeve 701 and the piston block 7 from rotating with the threaded rod 8, the rotation of the threaded rod 8 drives the piston block 7 to slide inside the sampling cylinder 1, drawing the sample into the sampling cylinder 1. The end of the sampling cylinder 1 away from the auxiliary sleeve 2 is connected to the base plate 5 through the support rod 4, providing stable support for the device. The drive source 9, mounted on the side of the base plate 5 away from the support rod 4, is powered by the battery 10 installed inside the base block 6. After the sampling is completed, if it is necessary to eject the sample, the drive source 9 can be reversed to drive the piston block 7 to eject the sample. Throughout the process, the scale markings 101 on the periphery of the sampling cylinder 1 can intuitively display the position of the piston block 7 inside the sampling cylinder 1, making it convenient for operators to understand the sampling volume in real time.

[0046] The figures shown in the accompanying drawings are illustrative and are intended only to more intuitively demonstrate the key structure and connection relationships of the improved occupational health sampler of this utility model; in practical applications, the appearance and size of the device can be adjusted and optimized according to specific needs.

[0047] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An improved occupational health sampler, comprising an auxiliary sleeve (2) and a collection tube (1), characterized in that: The auxiliary sleeve (2) is fitted onto the air inlet end of the collection tube (1), and the auxiliary sleeve (2) is rotatably connected to the collection tube (1). The auxiliary sleeve (2) is used to open or close the air inlet end of the collection tube (1), and the collection tube (1) is used to collect and preserve samples. The auxiliary sleeve (2) is provided with a first air inlet (102), and the collection tube (1) is provided with a second air inlet (201). The positions of the first air inlet (102) and the second air inlet (201) are corresponding. The position of the first air inlet (102) is far away from the central axis of the auxiliary sleeve (2), and the position of the second air inlet is far away from the central axis of the collection tube (1). An auxiliary ring (3) is provided around the collection cylinder (1) below the auxiliary sleeve (2). A through hole is provided inside the auxiliary ring (3). A spring (12) and a ball (11) are provided inside the through hole. The ball (11) is located at the end of the spring (12) closer to the auxiliary sleeve (2). A set screw (13) is provided in the through hole at the end of the spring (12) away from the ball (11) to control the compression degree of the spring (12). At least two positioning holes are provided on the contact surface between the auxiliary sleeve (2) and the auxiliary ring (3). The positioning holes are used to accommodate the ball (11) and can accommodate up to half of the ball (11). The positioning holes are used to limit the rotation angle of the auxiliary sleeve (2).

2. An improved occupational health sampler according to claim 1, characterized in that: The auxiliary sleeve (2) and the auxiliary ring (3) are respectively provided with a first reference notch (202) and a second reference notch (301), which are used to compare the positions of the first air inlet (102) and the second air inlet (201).

3. An improved occupational health sampler according to claim 1, characterized in that: A piston block (7) is slidably provided inside the collection tube (1), and the piston block (7) is used to draw the sample into the collection tube (1) or push the sample out of the collection tube (1).

4. An improved occupational health sampler according to claim 3, characterized in that: The piston block (7) is provided with a sleeve (701), and a threaded rod (8) is provided inside the sleeve (701). The sleeve (701) is threadedly connected to the threaded rod (8), and the threaded rod (8) is used to control the piston block (7) to move inside the collection tube (1) through the sleeve (701).

5. An improved occupational health sampler according to claim 1, characterized in that: The collection tube (1) is provided with a limiting bracket (103), which is located outside the sleeve (701). The limiting bracket (103) is used to prevent the sleeve (701) and the piston block (7) from rotating with the threaded rod (8).

6. An improved occupational health sampler according to claim 4, characterized in that: The end of the collection tube (1) away from the auxiliary sleeve (2) is provided with a support rod (4), the end of the support rod (4) away from the collection tube (1) is provided with a base plate (5), and the end of the threaded rod (8) away from the piston block (7) passes through the base plate (5).

7. An improved occupational health sampler according to claim 6, characterized in that: A drive source (9) is installed on the side of the base plate (5) away from the support rod (4). The output end of the drive source (9) is connected to the threaded rod (8). The drive source (9) is used to drive the threaded rod (8) to rotate.

8. An improved occupational health sampler according to claim 7, characterized in that: A base block (6) is detachably installed on the side of the base plate (5) away from the support rod (4). The base block (6) is sleeved around the drive source (9) and is used to protect the drive source (9).

9. An improved occupational health sampler according to claim 8, characterized in that: The bottom block (6) is also equipped with a storage battery (10), which is electrically connected to the drive source (9) and is used to supply power to the drive source (9).

10. An improved occupational health sampler according to claim 1, characterized in that: The outer periphery of the collection tube (1) is also provided with scale markings (101) to visually display the position of the piston block (7) inside the collection tube (1).

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