Vacuumizing equipment for soil gas collection bottle

Abstract

The utility model discloses vacuumizing equipment for a soil gas collection bottle, and relates to the technical field of vacuumizing equipment. The vacuumizing equipment for the soil gas collecting bottles comprises a shell and a sealing cover for sealing the shell, the top of the shell is an open end, a vacuumizing cavity is formed between the sealing cover and the shell after the sealing cover and the open end of the shell are sealed in a matched mode, a material carrying frame capable of at least bearing two collecting bottles is arranged at the bottom of the shell, and the collecting bottles are arranged on the material carrying frame. A pushing assembly is arranged in the vacuumizing cavity and comprises an electric push rod, a transmission frame and a pressing plate, a rear end connector of the electric push rod is installed on the sealing cover, a front end connector of the electric push rod is connected with the transmission frame, the two ends of the transmission frame are connected with the pressing plate, and the pressing plate is provided with at least two clamping parts capable of clamping bottle plugs of collection bottles. And the bottle plug clamped by the clamping part is coaxial with the bottle opening of the corresponding collection bottle on the material loading frame. According to the utility model, a plurality of gas collection bottles can be vacuumized at one time, and the interiors of the bottles can reach a complete vacuum state.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumping equipment, in particular to a vacuum pumping equipment used for a soil gas collection bottle. Background Art

[0002] Soil carbon is the largest carbon reservoir in terrestrial ecosystems and a significant source and sink of atmospheric CO₂. In today's "dual carbon" climate, soil CO₂ monitoring has garnered widespread attention. Currently, soil CO₂ measurement is primarily conducted in laboratory experiments and in situ field experiments, with significant differences in the amount of gas produced. Laboratory incubation experiments use relatively small devices for measuring greenhouse gases, such as 100-250 mL Erlenmeyer flasks. The amount of gas extracted may not be sufficient to fill the gas bag, resulting in ineffective collection and measurement of soil gas in laboratory incubation experiments. For field collection of large quantities of gas, gas bags can be used as collection devices, but these are inconvenient to transport or have poor airtightness. Therefore, gas cylinders are increasingly necessary as gas storage devices. When sampling soil CO₂ using gas cylinders, a PU tube is buried in the soil. Gas is then extracted using a syringe. The gas in the syringe is then injected into a gas cylinder of a specified volume for storage and transport back to the laboratory. The collected gas sample should be analyzed as soon as possible within a specified timeframe. The gas cylinder can be vacuumed before sample collection to prevent miscellaneous gases from contaminating related gases.

[0003] The current method of evacuating a gas cylinder is to pierce the rubber stopper sealed at the bottle mouth with a syringe needle, and then extract the air in the cylinder by pulling the piston rod to make the cylinder reach a vacuum state. However, this operation makes it difficult to achieve a complete vacuum state in the gas cylinder, which in turn causes the collected gas to be impure and affects the accuracy of the experiment. When multiple samples need to be collected from the same sampling point through a one-time operation, it is obviously difficult to meet the use requirements by only evacuating one gas cylinder at a time. However, there is no device in the prior art that can centrally evacuate batches of gas cylinders. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a vacuum pumping device for soil gas collection bottles, aiming to solve the problem that the gas cylinders cannot reach a complete vacuum state when vacuuming them, and at the same time solves the problem of how to centrally vacuumize batches of gas cylinders. It can improve the purity of the collected soil gas, ensure the accuracy of the experiment, improve the vacuum pumping efficiency of the gas cylinders, and shorten the preparation time before gas collection.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A vacuum pumping device for a soil gas collection bottle comprises a shell and a sealing cover for sealing the shell, the top of the shell is an open end, and after the sealing cover cooperates and seals with the open end of the shell, a vacuum chamber is formed between the sealing cover and the shell, a loading rack capable of carrying at least two collection bottles is provided at the bottom of the shell, and a pushing assembly is provided in the vacuum chamber, wherein the pushing assembly comprises an electric push rod, a transmission frame and a pressure plate, the rear end joint of the electric push rod is mounted on the sealing cover, the front end joint of the electric push rod is connected to the transmission frame, the two ends of the transmission frame are connected to the pressure plate, and the pressure plate is provided with at least two clamping parts capable of clamping the stoppers of the collection bottles, and the stoppers clamped by the clamping parts are coaxial with the corresponding collection bottle mouths on the loading rack.

[0007] Preferably, the upper part of the engaging portion is a rubber stopper, the middle part of the engaging portion is a plug, and the lower part of the engaging portion is a card cap, which engages with the bottle stopper. A plurality of through holes are provided on the pressure plate, and a vertical spacing is left between the portion of the pressure plate where the through holes are provided and the transmission frame. When the rubber stopper is squeezed into any through hole from bottom to top until the rubber stopper extends out of the through hole, the plug is limited in the through hole, and the card cap abuts against the lower side of the pressure plate.

[0008] Preferably, a stepped hole is provided on the cover, and a conduction component is connected to the stepped hole. The conduction component includes a convex tube threadedly connected to the large hole of the stepped hole, and a sealing gasket is sleeved on the lower part of the convex tube and matched with the small hole of the stepped hole. A transfer wire passes through the convex tube and is filled with sealant, and the connecting wire of the electric push rod is connected to the transfer wire.

[0009] Preferably, a plurality of anti-slip pieces are provided around the middle of the inner wall of the convex tube.

[0010] Preferably, a flange ring is provided on the circumferential outer wall of the open end of the shell, and the cover is detachably connected to the flange ring.

[0011] Preferably, the pushing assembly also includes a U-shaped frame connected to the inner side of the cover, and three guide holes are equidistantly provided on the U-shaped frame, wherein the middle guide hole is for the push rod of the electric push rod to pass through, and retractable guide columns are inserted into the guide holes on both sides, and the bottom ends of the inner columns of the two retractable guide columns are connected to the top of the transmission frame.

[0012] Preferably, an exhaust pipe is connected to the middle of the top of the cover, a valve is provided on the exhaust pipe, a vacuum gauge is provided on the left side of the top of the cover, and a handle is provided on the right side of the top of the cover.

[0013] Preferably, the plurality of through holes are distributed in a rectangular array on the pressing plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The utility model discloses a vacuum pumping device, wherein a plurality of gas collection bottles can be placed in its shell at one time for vacuum pumping operation, and bottle plugs are matched and placed on the pressure plate. After the vacuum pumping chamber is completely sealed, vacuum is pumped, and the bottle plug is accurately sealed at the bottle mouth of the collection bottle under the action of the pushing component. The vacuum pumping process is efficient. After placing the collection bottle and the bottle plug, the operator seals the cover with the shell to automatically vacuum and seal the collection bottle. The vacuum meter intuitively displays the vacuum degree parameters, and the manual opening and closing valve is conveniently used to control the pumping and inflation, thereby ensuring the quality and stability of the collection bottle processing;

[0016] The vacuum pumping device of the utility model has a loading rack at the bottom of its shell that can carry an appropriate number of collection bottles according to relevant gas collection requirements. When the cover is not assembled to the open end of the shell, the pushing assembly on the inner side thereof is exposed to the operator's field of vision, making it easy to engage the bottle stoppers on the corresponding engaging parts according to the number and position of the collection bottles. The cover and the shell are connected by a flange, and the structural dimensions of the two are coordinated, the sealing method is reliable, and the installation and disassembly are convenient.

[0017] The vacuum pumping device of the utility model has a stepped hole on the cover that is threadedly connected to the convex tube, so that the large hole of the stepped hole and the convex tube are connected and sealed. After the lower part of the convex tube is matched with the small hole of the stepped hole, the sealing gasket is compressed and the convex tube is filled with sealant. The above arrangement ensures that the vacuum chamber formed between the cover and the shell has a perfect sealing performance.

[0018] The vacuum equipment of the present invention is further connected to a U-shaped frame on its cover, which is supported by the U-shaped frame, and retractable guide columns are inserted on the left and right sides, which effectively avoids eccentric loads on the electric push rod; an adapter wire is passed through the convex tube, and the connecting wire connector of the adapter wire and the electric push rod is connected in the vacuum chamber, and there is no need to pass the connecting wire through the tube and then connect it externally, which simplifies the installation complexity of the electric push rod and reduces the packaging volume of the convex tube and the stepped hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the push component structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the engaging portion of the present utility model;

[0023] Figure 5 This is a schematic diagram of the explosion structure of the conductive component of the utility model.

[0024] In the figure: 1. Shell; 2. Flange ring; 3. Sealing cover; 4. Bolt; 5. Exhaust pipe; 6. Valve; 7. Loading rack; 8. Pushing assembly; 81. U-shaped frame; 82. Electric push rod; 83. Transmission frame; 84. Pressing plate; 85. Through hole; 86. Clamping part; 861. Insert column; 862. Rubber plug; 863. Card cap; 87. Guide hole; 88. Guide column; 9. Stepped hole; 10. Conducting assembly; 101. Convex tube; 102. Anti-slip sheet; 103. Adapter wire; 104. Sealant; 105. Sealing gasket; 11. Vacuum gauge; 12. Handle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art.

[0026] See also Figure 1 and Figure 2In this embodiment, the vacuuming device for soil gas collection bottles includes a housing 1 and a cover 3 that seals the housing 1. The top of the housing 1 is open. When the cover 3 is sealed with the open end of the housing 1, a vacuum chamber is formed between the cover 3 and the housing 1. To facilitate observation, the housing 1 can be made of a transparent material. A loading rack 7 capable of supporting at least two collection bottles is provided at the bottom of the housing 1. In this embodiment, the loading rack 7 can support six collection bottles. The loading rack 7 has a hole for limiting the position of the collection bottle body. After the collection bottle is placed through the hole, the loading rack 7 can limit the position of the collection bottle to prevent it from shifting during the vacuuming process. A pushing assembly 8 is provided in the vacuuming chamber and is used to seal the bottle stopper against the bottle mouth. The push assembly 8 comprises an electric push rod 82, a transmission frame 83, and a pressure plate 84. The rear end connector of the electric push rod 82 is mounted on the cover 3, while the front end connector of the electric push rod 82 is connected to the transmission frame 83. Both ends of the transmission frame 83 are connected to the pressure plate 84. The pressure plate 84 is provided with at least two engaging portions 86 for clamping the stoppers of the collection bottles. The stoppers clamped by the engaging portions 86 are coaxial with the corresponding bottle openings of the collection bottles on the loading rack 7. This ensures that when the push rod of the electric push rod 82 pushes the pressure plate 84 downward, the stoppers are always aligned with the bottle openings directly below them. To ensure smoother load operation of the electric push rod 82, the push assembly 8 in this embodiment further comprises a U-shaped frame 81 connected to the inside of the cover 3. The U-shaped frame 81 has three equally spaced guide holes 87. The middle guide hole 87 allows the push rod of the electric push rod 82 to pass through. Retractable guide posts 88 are inserted into the guide holes 87 on both sides. The inner bottom ends of the two retractable guide posts 88 are connected to the top of the transmission frame 83.

[0027] See Figure 1 A flange ring 2 is fixedly mounted on the circumferential outer wall of the open end of the housing 1. A cover 3 is detachably connected to the flange ring 2 on the housing 1 via multiple bolts 4. A rubber gasket can be added between the cover 3 and the flange ring 2 to improve sealing performance. An exhaust pipe 5 is connected to the top center of the cover 3, and a valve 6 is installed in the middle of the exhaust pipe 5. A vacuum gauge 11 is installed on the top left side of the cover 3, and a handle 12 is installed on the top right side of the cover 3 to facilitate the operator's installation and removal of the cover 3.

[0028] See Figure 3 and Figure 4The upper portion of the engaging portion 86 is a rubber stopper 862, the middle portion is a post 861, and the lower portion of the engaging portion 86 is a cap 863, which engages with the bottle stopper. The pressing plate 84 defines a plurality of through-holes 85, distributed in a rectangular array. A vertical gap is left between the portion of the pressing plate 84 where the through-holes 85 are located and the transmission frame 83, allowing the rubber stopper 862 to pass through. When the rubber stopper 862 is inserted upward through any through-hole 85 until it protrudes from that hole, the post 861 is precisely positioned within the hole 85, and the cap 863 abuts the underside of the pressing plate 84. This structural setting of the locking portion 86 can not only be firmly inserted into the through hole 85, but also because the plug 861 is forced upward when the bottle stopper is sealed, the plug 861 is not easy to fall off from the through hole 85; the locking cap 863 can both lock and install the bottle stopper and squeeze the bottle stopper so that the bottle stopper can be smoothly inserted into the bottle mouth, and when the pressure plate 84 moves upward, the locking cap 863 can be smoothly detached from the bottle stopper.

[0029] See Figure 2 and Figure 5 A stepped hole 9 is provided on the cover 3, and a conductive component 10 is connected to the stepped hole 9. The conductive component 10 includes a convex tube 101 threadedly connected to the large hole of the stepped hole 9. A sealing gasket 105 is sleeved on the lower part of the convex tube 101 and cooperates with the small hole of the stepped hole 9. A transfer line 103 passes through the convex tube 101 and is filled with sealant 104. A plurality of anti-slip sheets 102 are arranged on the middle part of the inner wall of the convex tube 101. Figure 5 The middle sealant 104 is the shape after molding, and the anti-slip sheet 102 will prevent the sealant 104 from loosening with the inner wall of the convex tube 101 due to other factors, thereby affecting the air tightness. The connecting line of the electric push rod 82 is connected to the adapter line 103. Through the convex tube 101 in the conductive component 10, it can be threaded and sealed with the large hole of the stepped hole 9, and it is convenient for the adapter line 103 to pass through. Then, the lumen of the convex tube 101 can be sealed by the sealant 104, which does not affect the conduction of electrical energy by the adapter line 103, and prevents external gas from entering the shell 1 through the convex tube 101. The sealing gasket 105 can strengthen the sealing of the convex tube 101 installed in the stepped hole 9 to ensure the air tightness of the vacuum chamber. Through the adapter 103, the electric push rod 82 can be connected to the external control device, so that the external device can conveniently control the operation of the electric push rod 82. There is no need to pass the connecting wire of the electric push rod 82 through the pipe for external connection, which simplifies the installation complexity of the electric push rod 82 and reduces the packaging volume of the convex tube 101 and the stepped hole 9.

[0030] When it is necessary to evacuate the gas collection bottle, the operator places the prepared collection bottles one by one on the loading rack 7 in the shell 1, and installs the bottle stopper at the designated position on the pressure plate 84 in the pushing assembly 8, so that the bottle stopper and the corresponding collection bottle mouth remain coaxial, that is, the bottle stopper is located directly above the bottle mouth. Next, the cover 3 is closed on the open end of the shell 1, and the cover 3 and the flange ring 2 are connected and fixed by tightening the bolts 4, so that a closed vacuum chamber is formed between the cover 3 and the shell 1. The valve 6 is opened, and the air pump is connected to the exhaust pipe 5 to evacuate the closed vacuum chamber, and the vacuum degree in the vacuum chamber is checked under the detection of the vacuum gauge 11. When the data monitored by the vacuum meter 11 reaches the preset value, the operator first closes the valve 6, and then controls the push assembly 8 to operate through the external control device and the transmission component 10, so that the push assembly 8 seals the bottle mouth with the stopper installed at its bottom, and then opens the valve 6 again and injects air into the vacuum chamber through the exhaust pipe 5, so that the air pressure inside and outside the shell 1 is consistent, and controls the push assembly 8 to return through the external control device and the transmission component 10, and then removes the bolt 4, opens the cover 3, and removes the collection bottle that has completed the vacuum treatment from the loading rack 7.

[0031] The vacuum pumping equipment of this embodiment can ensure that the collection bottle reaches a complete vacuum state during the entire vacuum pumping process, thereby improving the purity of the collected soil gas and ensuring the accuracy of the experiment; at the same time, it can vacuum multiple collection bottles at one time, which is easy to operate and saves experimental preparation time.

Claims

1. A vacuum pumping device for a soil gas collection bottle, comprising a housing and a cover for sealing the housing, wherein the top of the housing is an open end. When the cover is sealed with the open end of the housing, a vacuum chamber is formed between the cover and the housing, characterized in that: A loading rack capable of carrying at least two collection bottles is provided at the bottom of the shell, and a pushing assembly is provided in the vacuum chamber, wherein the pushing assembly includes an electric push rod, a transmission frame and a pressure plate, the rear end joint of the electric push rod is installed on the sealing cover, the front end joint of the electric push rod is connected to the transmission frame, and the two ends of the transmission frame are connected to the pressure plate, and the pressure plate is provided with at least two clamping parts that can clamp the stoppers of the collection bottles, and the stoppers clamped by the clamping parts are coaxial with the corresponding collection bottle mouths on the loading rack.

2. The vacuum pumping device for a soil gas collection bottle according to claim 1, characterized in that: The upper part of the engaging part is a rubber stopper, the middle part of the engaging part is a plug, and the lower part of the engaging part is a card cap, which engages with the bottle stopper. A plurality of through holes are provided on the pressure plate, and a vertical distance is left between the part of the pressure plate where the through holes are provided and the transmission frame. When the rubber stopper is squeezed into any through hole from bottom to top until the rubber stopper extends out of the through hole, the plug is limited in the through hole, and the card cap abuts against the lower side of the pressure plate.

3. The vacuum pumping device for a soil gas collection bottle according to claim 2, characterized in that: A stepped hole is provided on the cover, and a conduction component is connected to the stepped hole. The conduction component includes a convex tube threadedly connected to the large hole of the stepped hole. A sealing gasket is sleeved on the lower part of the convex tube and matched with the small hole of the stepped hole. An adapter wire passes through the convex tube and is filled with sealant. The connecting wire of the electric push rod is connected to the adapter wire.

4. The vacuum pumping device for a soil gas collection bottle according to claim 3, characterized in that: A plurality of anti-slip pieces are arranged around the middle of the inner wall of the convex tube.

5. The vacuum pumping device for a soil gas collection bottle according to claim 1, characterized in that: A flange ring is provided on the circumferential outer wall of the open end of the shell, and the sealing cover is detachably connected to the flange ring.

6. The vacuum pumping device for a soil gas collection bottle according to claim 1, characterized in that: The pushing assembly also includes a U-shaped frame connected to the inner side of the cover, and three guide holes are equidistantly provided on the U-shaped frame, wherein the middle guide hole is for the push rod of the electric push rod to pass through, and retractable guide columns are inserted into the guide holes on both sides, and the bottom ends of the inner columns of the two retractable guide columns are connected to the top of the transmission frame.

7. The vacuum pumping device for a soil gas collection bottle according to claim 1, characterized in that: The top of the cover is connected to a vacuum pipe near the middle, a valve is arranged on the vacuum pipe, a vacuum gauge is arranged on the left side of the top of the cover, and a handle is arranged on the right side of the top of the cover.

8. The vacuum pumping device for a soil gas collection bottle according to claim 2, characterized in that: The plurality of through holes are distributed on the pressing plate in a rectangular array.

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