A vacuum box sampler for precisely controlling flow

Abstract

The utility model discloses a vacuum box sampler of accurate control flow belongs to gas sampling technical field, including vacuum box, the inside bottom wall fixed mounting of vacuum box has extrusion subassembly, one side of vacuum box is provided with round slot, the inside fixed connection of round slot has air inlet component, through setting extrusion subassembly, make the clamping plate relative movement to the gas bag is clamped, and utilize pressure sensor monitoring the tension of gas bag expansion time to dynamic adjustment clamping plate extrusion force to gas bag, can ensure that the tension that gas bag produced in the inflation process keeps consistent, guarantees the stability of gas flow, and then improves the accuracy and reliability of sampling process to effectively avoid the gas flow fluctuation caused by gas bag tension change, ensure that the real reflection of sampling result, through setting up air inlet component, rotates first connecting head and can realize its quick separation with second connecting head, and the operation is simple and convenient, and the use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling technology, specifically a vacuum chamber sampler with precise flow control. Background Technology

[0002] A vacuum chamber sampler is a device used to collect air, gas, or samples in a controlled environment. It creates negative pressure by drawing a vacuum, which draws the target gas or particulate matter into the chamber, facilitating quality testing, analysis, or experiments. It is widely used in environmental monitoring, food safety, industrial testing, and other fields.

[0003] An investigation revealed that a Chinese utility model patent discloses a vacuum chamber gas bag sampler (publication number: CN219736969U), which includes a vacuum housing and a sealing cover hinged to the top of the vacuum housing. A vacuum pump is provided on one side of the vacuum housing and an air inlet pipe is provided on the other side. The outlet end of the air inlet pipe is connected to a collection gas bag placed inside the vacuum housing. The inlet end of the collection gas bag is provided with a connecting pipe communicating with the air inlet pipe. The connecting pipe and the air inlet pipe are connected by a connecting unit. The connecting unit has a structure that can generate clamping force and simultaneously cover part of the connecting pipe and part of the air inlet pipe.

[0004] Although the aforementioned patent connects the connecting unit with the connecting pipe and the air inlet pipe simultaneously through a connecting unit that generates clamping force, thus ensuring sealing, enabling rapid assembly, and increasing the convenience of disassembling and removing the sampling gas bag, it is not convenient to accurately control the amount of gas entering the gas bag. Due to the inconsistent tension of the gas bag during the expansion process, it may affect the gas flow rate, interfere with the accurate judgment of the intake volume, and cause the sampling results to fail to truly reflect the gas emission situation at the sampling point, thereby affecting the accuracy of environmental monitoring and law enforcement.

[0005] Therefore, this invention provides a vacuum chamber sampler with precise flow control to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This invention provides a vacuum chamber sampler with precise flow control, aiming to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a vacuum chamber is included, wherein a compression assembly is fixedly installed on the inner bottom wall of the vacuum chamber, and a circular groove is provided on one side of the vacuum chamber, wherein an air intake assembly is fixedly connected inside the circular groove;

[0010] The extrusion assembly includes a motor, the lower surface of which is fixedly mounted on the inner bottom wall of the vacuum chamber. A gear is fixedly connected to the output end of the motor. A rack is meshed on both sides of the outer surface of the gear. A clamping plate is fixedly connected to one end of the upper surface of the rack. A through groove is formed on the front surface of the clamping plate. A pressure sensor is fixedly installed inside the through groove.

[0011] As a preferred technical solution of this application, the air intake assembly includes an air intake pipe, the outer surface of which is fixedly connected to the inside of a circular groove, one end of which is rotatably connected to a first connector via a bearing, a sealing gasket is fixedly connected to one side of the first connector, and a limiting member is fixedly connected to the edge of one side of the first connector.

[0012] As a preferred technical solution of this application, the outer surface of the limiting member is snapped with a second connector, an extension tube is fixedly connected to one side of the second connector, and an air bag is fixedly connected to one end of the extension tube.

[0013] As a preferred technical solution of this application, connecting blocks are fixedly connected to both sides of the lower surface of the clamping plate, and telescopic rods are fixedly connected to the opposite sides of the connecting blocks.

[0014] As a preferred technical solution of this application, a vacuum pump is fixedly installed on the other side of the vacuum box, and an outlet groove is opened on the other side of the vacuum box at the edge of the vacuum pump, which is fixedly connected to the pumping end of the vacuum pump.

[0015] As a preferred technical solution of this application, a lid is hinged to one side of the upper surface of the vacuum chamber, and a hook is rotatably connected to the front surface of the lid.

[0016] As a preferred technical solution of this application, a rubber pad is fixedly connected to the outer periphery of the upper surface of the vacuum box, a locking block adapted to the locking hook is fixedly connected to the front surface of the vacuum box, a placement plate is fixedly connected to the middle of the inner wall of the vacuum box, and a guide groove is formed on the upper surface of the placement plate.

[0017] (III) Beneficial Effects

[0018] 1. By using the compression components, the clamping plates move relative to each other to clamp the gas bag. The pressure sensor monitors the tension of the gas bag during expansion, thereby dynamically adjusting the squeezing force of the clamping plates on the gas bag. This ensures that the tension generated by the gas bag during expansion remains consistent, guarantees the stability of the gas flow, and improves the accuracy and reliability of the sampling process. It effectively avoids gas flow fluctuations caused by changes in gas bag tension, ensuring the true reflection of the sampling results.

[0019] 2. By rotating the first connector, the air intake component can be used to quickly separate the air bag from the second connector. The operation is simple and convenient, which effectively improves the efficiency and flexibility of the air bag during installation and disassembly. Attached Figure Description

[0020] Figure 1 A schematic diagram of a vacuum chamber sampler for precise flow control;

[0021] Figure 2 This is a schematic diagram of the internal structure of a vacuum chamber in a vacuum chamber sampler for precise flow control.

[0022] Figure 3 This is a schematic diagram of the clamping plate in a vacuum chamber sampler for precise flow control;

[0023] Figure 4 This is a schematic diagram of the rack structure in a vacuum chamber sampler for precise flow control;

[0024] Figure 5 This is a schematic diagram of the structure of the first connector in a vacuum chamber sampler for precise flow control.

[0025] In the picture:

[0026] 1. Vacuum chamber; 2. Motor; 3. Gear; 4. Rack; 5. Clamping plate; 6. Pressure sensor; 7. Inlet pipe; 8. Bearing; 9. First connector; 10. Sealing gasket; 11. Limiting component; 12. Second connector; 13. Extension tube; 14. Air bag; 15. Connecting block; 16. Telescopic rod; 17. Vacuum pump; 18. Chamber cover; 19. Hook; 20. Rubber pad; 21. Locking block; 22. Placement plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This invention provides a vacuum chamber sampler for precise flow control, such as... Figures 1-5 As shown, a vacuum chamber sampler with precise flow control includes a vacuum chamber 1. An extrusion assembly is fixedly installed on the inner bottom wall of the vacuum chamber 1. A circular groove is opened on one side of the vacuum chamber 1, and an air inlet assembly is fixedly connected inside the circular groove.

[0029] The extrusion assembly includes a motor 2, the lower surface of which is fixedly mounted on the inner bottom wall of the vacuum chamber 1. A gear 3 is fixedly connected to the output end of the motor 2. Both sides of the outer surface of the gear 3 are meshed with racks 4. A clamping plate 5 is fixedly connected to one end of the upper surface of the racks 4. A through groove is formed on the front surface of the clamping plate 5. A pressure sensor 6 is fixedly installed inside the through groove. When the motor 2 is started, it drives the gear 3 to rotate, causing the racks 4 on both sides to move relative to or towards each other on their outer surfaces. This can drive the clamping plate 5 to move and clamp the gas bag 14. At the same time, the pressure sensor 6 contacts the surface of the gas bag 14, allowing the pressure sensor 6 to monitor the tension of the gas bag 14 during expansion. This allows for dynamic adjustment of the extrusion pressure of the clamping plate 5 on the gas bag 14, ensuring that the tension generated by the gas bag 14 remains consistent during expansion, thus ensuring the stability of the gas flow rate. This improves the accuracy and reliability of the sampling process and effectively avoids gas flow fluctuations caused by changes in the tension of the gas bag 14, ensuring the accurate reflection of the sampling results.

[0030] The air intake assembly includes an air intake pipe 7, the outer surface of which is fixedly connected to the inside of a circular groove. One end of the air intake pipe 7 is rotatably connected to a first connector 9 via a bearing 8. A sealing gasket 10 is fixedly connected to one side of the first connector 9, and a limiting member 11 is fixedly connected to the edge of one side of the first connector 9. By rotating the first connector 9, the limiting member 11 can be rotated synchronously. By controlling the position of the limiting member 11, the separation and connection of the first connector 9 can be achieved. The operation is simple and convenient, effectively improving the efficiency and flexibility of the air bag 14 during installation and disassembly. In addition, the sealing gasket 10 can improve the airtightness of the connection between the first connector 9 and the second connector 12, ensuring the effective entry of gas.

[0031] The outer surface of the limiting member 11 is snapped with a second connector 12. An extension tube 13 is fixedly connected to one side of the second connector 12. An air bag 14 is fixedly connected to one end of the extension tube 13. The outer surface of the second connector 12 is provided with a groove that matches the limiting member 11, so that the limiting member 11 can pass through and the two can be connected. The extension tube 13 keeps the air bag 14 away from the second connector 12, leaving space for the operation of the second connector 12. The air bag 14 can sample the air.

[0032] Connecting blocks 15 are fixedly connected to both sides of the lower surface of the clamping plate 5. Telescopic rods 16 are fixedly connected to the opposite sides of the connecting blocks 15. The connecting blocks 15 facilitate the connection between the telescopic rods 16 and the clamping plate 5. The telescopic rods 16 ensure the uniformity of force on both sides when the clamping plate 5 moves.

[0033] A vacuum pump 17 is fixedly installed on the other side of the vacuum chamber 1. An outlet groove is opened on the other side of the vacuum chamber 1 at the edge of the vacuum pump 17 and is fixedly connected to the suction end of the vacuum pump 17. The vacuum pump 17 can be started to perform vacuuming operation on the vacuum chamber 1 through the outlet groove.

[0034] A lid 18 is hinged to one side of the upper surface of the vacuum chamber 1. A hook 19 is rotatably connected to the front surface of the lid 18. The lid 18 can close the top of the vacuum chamber 1. The hook 19 is engaged with the inside of the locking block 21, which can connect the lid 18 to the vacuum chamber 1.

[0035] A rubber pad 20 is fixedly connected to the outer periphery of the upper surface of the vacuum chamber 1. A locking block 21 that matches the hook 19 is fixedly connected to the front surface of the vacuum chamber 1. A placement plate 22 is fixedly connected to the middle of the inner wall of the vacuum chamber 1. A guide groove is opened on the upper surface of the placement plate 22. The rubber pad 20 can improve the sealing between the chamber cover 18 and the vacuum chamber 1. The placement plate 22 facilitates the placement of the air bag 14.

[0036] Working steps: First, close the lid 18 and engage the hook 19 with the block 21 to connect the lid 18 to the vacuum chamber 1. Next, start the vacuum pump 17 to evacuate the vacuum chamber 1 through the outlet. At the same time, under atmospheric pressure, external gas enters the air bag 14 through the inlet pipe 7. Next, start the motor 2 to drive the gear 3 to rotate, causing the racks 4 on both sides to move relative to or towards each other on their outer surfaces. This moves the clamping plate 5 to clamp the air bag 14. At the same time, the pressure sensor 6 contacts the surface of the air bag 14, allowing the pressure sensor 6 to monitor the tension of the air bag 14 during expansion, thereby dynamically adjusting the squeezing force of the clamping plate 5 on the air bag 14. Finally, by rotating the first connector 9, the limiting member 11 can be rotated synchronously. By controlling the position of the limiting member 11, the first connector 9 can be separated.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vacuum chamber sampler for precise flow control, comprising a vacuum chamber (1), characterized in that: An extrusion assembly is fixedly installed on the inner bottom wall of the vacuum chamber (1), and a circular groove is opened on one side of the vacuum chamber (1), with an air inlet assembly fixedly connected inside the circular groove. The extrusion assembly includes a motor (2), the lower surface of which is fixedly installed on the inner bottom wall of the vacuum chamber (1). A gear (3) is fixedly connected to the output end of the motor (2). A rack (4) meshes with both sides of the outer surface of the gear (3). A clamping plate (5) is fixedly connected to one end of the upper surface of the rack (4). A through groove is opened on the front surface of the clamping plate (5). A pressure sensor (6) is fixedly installed inside the through groove.

2. The vacuum chamber sampler for precise flow control according to claim 1, characterized in that: The air intake assembly includes an air intake pipe (7), the outer surface of which is fixedly connected to the inside of a circular groove. One end of the air intake pipe (7) is rotatably connected to a first connector (9) via a bearing (8). A sealing gasket (10) is fixedly connected to one side of the first connector (9), and a limiting member (11) is fixedly connected to the edge of one side of the first connector (9).

3. A vacuum chamber sampler for precise flow control according to claim 2, characterized in that: The outer surface of the limiting member (11) is snapped with a second connector (12), and an extension tube (13) is fixedly connected to one side of the second connector (12), and an air bag (14) is fixedly connected to one end of the extension tube (13).

4. A vacuum chamber sampler for precise flow control according to claim 1, characterized in that: Connecting blocks (15) are fixedly connected to both sides of the lower surface of the clamping plate (5), and telescopic rods (16) are fixedly connected to the opposite sides of the connecting blocks (15).

5. A vacuum chamber sampler for precise flow control according to claim 1, characterized in that: A vacuum pump (17) is fixedly installed on the other side of the vacuum box (1), and an outlet groove is opened on the other side of the vacuum box (1) at the edge of the vacuum pump (17) and is fixedly connected to the suction end of the vacuum pump (17).

6. A vacuum chamber sampler for precise flow control according to claim 1, characterized in that: A lid (18) is hinged to one side of the upper surface of the vacuum chamber (1), and a hook (19) is rotatably connected to the front surface of the lid (18).

7. A vacuum chamber sampler for precise flow control according to claim 1, characterized in that: A rubber pad (20) is fixedly connected to the outer periphery of the upper surface of the vacuum box (1). A locking block (21) that matches the hook (19) is fixedly connected to the front surface of the vacuum box (1). A placement plate (22) is fixedly connected to the middle of the inner wall of the vacuum box (1). A guide groove is provided on the upper surface of the placement plate (22).

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