Cleaning device of gas cylinder for gas standard substance

Abstract

The utility model relates to the technical field of gas standard substances, and discloses a cleaning device of a gas cylinder for a gas standard substance, which comprises a circular box body and a gas circuit main pipeline, the gas circuit main pipeline is connected with a vacuumizing device, the gas circuit main pipeline is provided with a main valve, and a plurality of branch pipelines are arranged on the gas circuit main pipeline. Each branch pipeline is provided with a branch valve and a quick connector; a rotary lofting frame and a rotary driving mechanism for controlling the rotary lofting frame to rotate are rotationally arranged in the circular box body, the rotary lofting frame comprises a bottom plate, a top plate and an inner cylinder, an annular lofting chamber is formed between the inner cylinder and the circular box body, a plurality of lofting holes are formed in the top plate, and an annular lifting plate is arranged in the annular lofting chamber; a plurality of sample placing grooves are correspondingly formed in the annular lifting plate; a first lifting mechanism for controlling the annular lifting plate to lift is arranged below the bottom plate; and an automatic loading and unloading mechanism is arranged above one lofting hole station. The gas cylinder feeding and discharging device can automatically feed and discharge gas cylinders, and gas cylinder replacement is more labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of gas standard substances, in particular to a cleaning device for a gas cylinder used for gas standard substances. Background Art

[0002] Gas cylinders are often used as containers for gas standard substances. In order to ensure that the gas cylinders are free of residual gas, impurities, moisture, and adsorption, the cleaning of the gas cylinders is an important part of the quality of gas standard substances. Currently, gas cylinders are mainly cleaned by gas replacement. For example, the Chinese invention patent with patent announcement number CN 106140752 A discloses a gas standard substance cylinder cleaning device, which includes a processing chamber, in which a bottle rack for carrying at least one gas standard substance cylinder, a valve cavity, and a lifting mechanism are provided; when the gas standard substance cylinder is cleaned, the lifting mechanism controls the relative movement between the valve cavity and the gas standard substance cylinder so that the valve of the gas standard substance cylinder is located in the valve cavity; a quick connector for connecting to the valve of the gas standard substance cylinder is provided in the valve cavity. The device achieves the cleaning of the gas cylinder by replacing the gas in the gas cylinder. However, the existing devices are all manually loaded and unloaded, and for gas cylinders with large capacity, the replacement process is not labor-saving enough. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and provide a cleaning device for gas cylinders used for gas standard substances, which can automatically load and unload the gas cylinders.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a cleaning device for a gas cylinder for a gas standard substance, comprising a circular box body and a gas main pipeline arranged outside the circular box body, the gas main pipeline being connected to a vacuum pumping device, the gas main pipeline being provided with a main valve, the gas main pipeline being provided with a plurality of branch pipelines, each branch pipeline being provided with a branch valve and a quick connector; a rotating sample rack for carrying a gas cylinder and a rotating driving mechanism for controlling the rotation of the rotating sample rack are rotatably provided in the circular box body, the rotating sample rack comprising a bottom plate, a top plate and an inner cylinder connected between the bottom plate and the top plate, the bottom plate and the top plate are both connected to the inner cylinder The circular box body is rotatably connected, and an annular lofting chamber is formed between the inner cylinder and the circular box body. The top plate is located in the annular lofting chamber and has a plurality of lofting holes evenly distributed along the circumference. An annular lifting plate is provided in the annular lofting chamber, and a plurality of lofting grooves are provided on the annular lifting plate. The lofting grooves correspond to the lofting holes one by one. A first lifting mechanism for controlling the lifting and lowering of the annular lifting plate is provided below the bottom plate; an automatic loading and unloading mechanism is provided above one of the lofting hole stations, and the automatic loading and unloading mechanism includes a rotatable frame, a clamping mechanism for clamping the gas cylinder, and a second lifting mechanism provided on the frame for driving the clamping mechanism to lift and lower.

[0005] Preferably, the first lifting mechanism includes an electric cylinder, the electric cylinder is arranged at the bottom of the bottom plate, the telescopic end of the electric cylinder is connected to the annular lifting plate, and the annular lifting plate is slidably connected to the inner wall of the circular box body and the outer wall of the inner cylinder.

[0006] Preferably, a base is arranged on the outer side of the bottom of the circular box body, a turntable is rotatably arranged on the base, the frame body is fixed on the turntable, and a first driving motor for controlling the rotation of the turntable is arranged in the base.

[0007] Preferably, the clamping mechanism includes a pair of clamping plates for clamping the gas cylinder and a double-acting guide rod cylinder for controlling the horizontal opening and closing of the pair of clamping plates. The clamping surface of the clamping plate is an arc surface matching the gas cylinder. The double-acting guide rod cylinder is horizontally installed on the C-shaped frame, and its piston end is connected to the clamping plate.

[0008] Preferably, the second lifting mechanism includes a guide rod cylinder, the guide rod cylinder is fixed on the top of the frame body, and its telescopic end is connected to the C-shaped frame.

[0009] Preferably, the rotation driving mechanism includes a second driving motor and a rotating shaft rod. An installation frame is arranged at the bottom of the circular box body. The rotating shaft rod is rotatably connected to the installation frame. The second driving motor is connected to the rotating shaft rod. Both the bottom plate and the top plate are connected to the rotating shaft rod.

[0010] Preferably, infrared heating tubes are arranged on the inner wall of the circular box body, and a temperature controller is arranged outside the circular box body.

[0011] Preferably, it further includes an external gas cylinder for containing the replacement gas. The external gas cylinder is connected to the main gas pipeline through a quick connector.

[0012] Due to the adoption of the above technical solutions, the present utility model has the following beneficial effects:

[0013] By arranging a rotating lofting frame and an automatic loading and unloading mechanism in the present utility model, a plurality of lofting holes are circumferentially arranged on the rotating lofting frame, and an annular lifting plate is arranged in the annular lofting chamber. As the rotating lofting frame rotates, the lofting holes can be sequentially rotated to the lofting stations. The height of the gas cylinder extending out of the annular lofting chamber is adjusted by the lifting of the annular lifting plate. The rotatable frame body, clamping mechanism and lifting mechanism of the automatic loading and unloading mechanism cooperate to clamp the gas cylinder or clamp and unload the gas cylinder at the lofting station. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a cleaning device for a gas cylinder used for a gas reference material of the present utility model;

[0015] Figure 2 is a longitudinal sectional view of the circular box body of the present utility model;

[0016] In the figure: 1 - circular box body, 2 - rotary lofting frame, 21 - bottom plate, 22 - inner cylinder, 23 - top plate, 201 - lofting hole, 3 - vacuum pumping device, 4 - main gas pipeline, 41 - main valve, 42 - quick connector, 43 - branch valve, 5 - clamping mechanism, 51 - double - acting guide rod cylinder, 52 - clamping plate, 53 - C - shaped frame, 6 - frame body, 61 - base, 62 - turntable, 7 - guide rod cylinder, 8 - gas cylinder, 9 - external gas cylinder; 10 - rotary drive mechanism, 101 - second drive motor, 102 - rotating shaft rod, 103 - mounting frame, 11 - annular lifting plate, 12 - electric cylinder, 13 - infrared heating tube, 14 - temperature controller. Specific embodiments

[0017] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The terms "first", "second", etc. in the description and claims of the present utility model and the above - mentioned drawings are used to distinguish different objects and not to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0018] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in conjunction with the embodiment can be included in at least one embodiment of the present utility model. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0019] As Figure 1-Figure 2As shown, a cleaning device for gas cylinders for gas standard substances includes a circular box body 1 and a gas main pipeline 4 arranged outside the circular box body 1. The gas main pipeline 4 is connected to the vacuum pumping device 3. The gas main pipeline 4 is provided with a main valve 41. The gas main pipeline 4 is provided with a plurality of branch pipelines. Each branch pipeline is provided with a branch valve 43 and a quick connector 42. In this embodiment, 10 branch pipelines are provided on the gas main pipeline 4. The branch pipelines are metal corrugated hoses, and the ends of the branch pipelines are quick connectors 42. A rotating lofting frame 2 for carrying the gas cylinder 8 and a rotating driving mechanism 10 for controlling the rotation of the rotating lofting frame 2 are rotatably provided in the circular box 1. The rotating lofting frame 2 includes a bottom plate 21, a top plate 23 and an inner cylinder 22 connected between the bottom plate 21 and the top plate. The bottom plate 21 and the top plate 23 are both rotatably connected to the circular box 1. An annular lofting chamber is formed between the inner cylinder 22 and the circular box 1. The top plate 23 is located in the annular lofting chamber and is uniformly distributed along the circumference of a plurality of lofting holes 201. An annular lifting plate 11 is provided in the annular lofting chamber. The annular lifting plate 11 is provided with a plurality of lofting grooves, which correspond one-to-one to the lofting holes 201. A first lifting mechanism for controlling the lifting and lowering of the annular lifting plate 11 is provided below the bottom plate 21; an automatic loading and unloading mechanism is provided above one of the lofting hole stations, and the automatic loading and unloading mechanism includes a rotatable frame 6, a clamping mechanism 5 for clamping the gas cylinder 8, and a second lifting mechanism for driving the clamping mechanism 5 to lift and lower.

[0020] like Figure 2 As shown, the first lifting mechanism includes an electric cylinder 12, which is installed at the bottom of the base plate 21. The telescopic end of the electric cylinder 12 is connected to the annular lifting plate 11, which is slidably connected to the inner wall of the circular box 1 and the outside of the inner cylinder 22. Specifically, the inner wall of the circular box 1 and the outside of the inner cylinder 22 are provided with slide rails, and the annular lifting plate 11 is installed on a slider that is slidably connected to the slide rails.

[0021] A base 61 is provided on the outer side of the bottom of the circular box 1. A turntable 62 is rotatably provided on the base 61. The frame 6 is fixed on the turntable 62. A first drive motor for controlling the rotation of the turntable 62 is provided in the base 61. The rotation of the turntable 62 drives the frame 6 to rotate, thereby facilitating the loading and unloading of gas cylinders 8.

[0022] The clamping mechanism 5 includes a pair of clamping plates 52 for clamping the gas cylinder 8 and a dual-guide rod cylinder 51 that controls the horizontal opening and closing of the clamping plates 52. The clamping surfaces of the clamping plates 52 are curved surfaces that match the gas cylinder. The dual-guide rod cylinder 51 is horizontally mounted on a yoke 53, with its piston end connected to the clamping plates 52. The expansion and contraction of the dual-guide rod cylinder 51 controls the opening and closing of the clamping plates 52.

[0023] The second lifting mechanism comprises a guide rod cylinder 7, which is fixed to the top of the frame body 6 and has a telescopic end connected to the yoke 53. The telescopic movement of the guide rod cylinder 7 allows the gas cylinder 8 to be placed in or released from the lofting hole 201.

[0024] like Figure 2 As shown, the rotary drive mechanism 10 includes a second drive motor 101 and a rotating shaft 102. A mounting bracket 103 is provided at the bottom of the circular box 1. The rotating shaft 102 is rotatably connected to the mounting bracket 103. The second drive motor 101 is connected to the rotating shaft 102. The bottom plate 21 and the top plate 23 are also connected to the rotating shaft 102. The second drive motor 101 drives the rotating shaft 102 to rotate, thereby driving the rotary layout frame 2 to rotate, so that the layout holes can be rotated to the layout station in sequence.

[0025] An infrared heating tube 13 is provided on the inner wall of the circular box 1 , and a temperature controller 14 is provided outside the circular box 1 .

[0026] It also includes an external gas cylinder 9 for containing gas for replacement, and the external gas cylinder 9 is connected to the gas main pipeline 4 through a quick connector 42.

[0027] During use, the gas cylinder 8 is placed in the layout hole 201 through the automatic loading and unloading mechanism. Specifically, the gas cylinder 8 is moved to the outside of the circular box 1 by the trolley, the turntable 62 is rotated 90° counterclockwise, and the gas cylinder 8 on the trolley is moved to the bottom of the clamping mechanism 5. The guide rod cylinder 7 is activated, causing the clamping mechanism 5 to move downward, and the gas cylinder 8 is clamped by a pair of clamps 52. The guide rod cylinder 7 then contracts and drives the gas cylinder 8 upward. After the turntable 62 rotates 90°, the guide rod cylinder 7 extends again and drives the gas cylinder 8 downward and into the layout hole 201. The layout frame 2 is then rotated one station to continue the layout of the next hole. When the gas cylinder 8 is placed in all the holes, the annular lifting plate 11 moves downward under the action of the electric cylinder 12 to ensure that the entire body of the gas cylinder 8 is in the layout chamber. Then, the gas cylinders 8 are connected through the quick connector 42 on the branch pipe. The heating temperature of the gas cylinder 8 is set by the temperature controller 14. Open the branch valves 43 on each branch pipe, evacuate the gas from the cylinder 8 by vacuuming, then open the external cylinder 9 to inflate and replace the gas, then evacuate and empty again. This cleans the cylinder 8 by gas replacement, with the cleaning frequency adjustable as needed. Once cleaning is complete, separate the quick connector 42 from the cylinder 8, and the electric cylinder 12 controls the annular lift plate 11 to rise, exposing the cylinder 8. The automatic loading and unloading mechanism then grips the cylinder 8 and automatically unloads it.

[0028] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A cleaning device for a gas cylinder for a gas standard substance, characterized by: It includes a circular box body and a main gas pipeline arranged outside the circular box body. The main gas pipeline is connected to a vacuum pumping device. The main gas pipeline is provided with a main valve, and there are several branch pipelines on the main gas pipeline. Each branch pipeline is provided with a sub-valve and a quick connector; A rotary laying frame for carrying gas cylinders and a rotary drive mechanism for controlling the rotation of the rotary laying frame are rotatably arranged in the circular box body. The rotary laying frame includes a bottom plate, a top plate and an inner cylinder connected between the bottom plate and the top plate. Both the bottom plate and the top plate are rotatably connected to the circular box body. An annular laying chamber is formed between the inner cylinder and the circular box body. A plurality of laying holes are evenly distributed along the circumference at the part of the top plate located in the annular laying chamber. An annular lifting plate is arranged in the annular laying chamber. A plurality of laying grooves are arranged on the annular lifting plate. The laying grooves correspond to the laying holes one by one. A first lifting mechanism for controlling the lifting of the annular lifting plate is arranged below the bottom plate; An automatic loading and unloading mechanism is arranged above one of the laying hole stations. The automatic loading and unloading mechanism includes a rotatable frame body, a clamping mechanism for clamping gas cylinders and a second lifting mechanism arranged on the frame body for driving the clamping mechanism to lift and lower.

2. The cleaning device for a gas cylinder for a gas standard substance according to claim 1, characterized in that: The first lifting mechanism includes an electric cylinder. The electric cylinder is arranged at the bottom of the bottom plate. The telescopic end of the electric cylinder is connected to the annular lifting plate. The annular lifting plate is slidably connected to the inner wall of the circular box body and the outer wall of the inner cylinder.

3. The cleaning device for a gas cylinder for a gas standard substance according to claim 1, characterized in that: A base is arranged outside the bottom of the circular box body. A turntable is rotatably arranged on the base. The frame body is fixed on the turntable. A first driving motor for controlling the rotation of the turntable is arranged in the base.

4. The cleaning device for a gas cylinder for a gas standard substance according to claim 1, characterized in that: The clamping mechanism includes a pair of clamping plates for clamping gas cylinders and a double-acting guide rod cylinder for controlling the horizontal opening and closing of the pair of clamping plates. The clamping surface of the clamping plate is an arc surface matching the gas cylinder. The double-acting guide rod cylinder is horizontally installed on a U-shaped frame, and its piston end is connected to the clamping plate.

5. The cleaning device for a gas cylinder for a gas standard substance according to claim 4, characterized in that: The second lifting mechanism includes a guide rod cylinder. The guide rod cylinder is fixed at the top of the frame body, and its telescopic end is connected to the U-shaped frame.

6. The cleaning device for a gas cylinder for a gas standard substance according to claim 1, characterized in that: The rotary drive mechanism includes a second driving motor and a rotating shaft rod. An installation frame is arranged at the bottom of the circular box body. The rotating shaft rod is rotatably connected to the installation frame. The second driving motor is connected to the rotating shaft rod. Both the bottom plate and the top plate are connected to the rotating shaft rod.

7. The cleaning device for a gas cylinder for a gas standard substance according to claim 1, characterized in that: Infrared heating tubes are arranged on the inner wall of the circular box body. A temperature controller is arranged outside the circular box body.

8. The cleaning device for a gas cylinder for a gas standard substance according to claim 1, characterized in that: It also includes an external gas cylinder for containing replacement gas. The external gas cylinder is connected to the main gas pipeline through a quick connector.

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