Device for sampling liquefied petroleum gas cylinder
By designing a sample introduction device that includes a base, bracket, fixing ring and transparent observation tube, the risks of clamping and freezing of liquefied petroleum gas cylinders during the sample introduction process are solved, and safe and convenient impurity removal and sample introduction are achieved.
Patent Information
- Application Number
- CN202423163681.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Liquefied petroleum gas cylinders are difficult to clamp during the sample injection process, and operators are prone to frostbite. Existing devices are not able to safely and conveniently remove impurities.
Design a sample introduction device that includes a base, a bracket, an upper cylinder fixing ring, a lower cylinder fixing support, a push-pull quick connector, and a waste discharge and sample introduction assembly. Utilize a transparent observation tube and a straight-through valve to achieve visualized removal of impurities and safe sample introduction.
It achieves stable fixation and position restriction of liquefied petroleum gas cylinders, avoids frostbite to operators, ensures safe and convenient operation, effectively removes impurities, and avoids direct contact with steel cylinders.
Smart Images
Figure CN223796519U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of testing equipment technology, and specifically relates to a device for injecting samples from liquefied petroleum gas cylinders. Background Technology
[0002] According to the method requirements of NB / SH / T0230-2019 "Determination of Composition of Liquefied Petroleum Gas by Gas Chromatography", liquefied petroleum gas samples need to be introduced into a gas chromatograph after collection. In practice, it has been found that due to the complex composition of liquefied petroleum gas samples, impurities can easily contaminate downstream gas chromatographic analysis and other detection systems. Therefore, impurities must be removed before sample injection. However, the process of removing impurities is difficult to operate because liquefied petroleum gas cylinders are not easy to clamp, and the vaporization of liquefied petroleum gas absorbs a large amount of heat, posing a risk of frostbite to operators. Therefore, a device is needed to facilitate the injection of liquefied petroleum gas cylinders and quickly remove impurities before entering the gas chromatograph. Summary of the Invention
[0003] To achieve the above objectives, this utility model provides a sample introduction device for connecting a liquefied petroleum gas cylinder and a gas chromatograph, which reduces manual operation, avoids direct contact between the operator and the steel cylinder, is safe and convenient, and effectively removes impurities. The specific technical solution adopted is as follows: A device for sample introduction from a liquefied petroleum gas cylinder includes at least a base and a bracket fixed on the base. The bracket is arranged from top to bottom as follows: an upper cylinder fixing ring, a lower cylinder fixing support, a push-pull quick connector, and a waste discharge sample introduction assembly. The upper cylinder fixing ring is ring-shaped, and the lower cylinder fixing support is an inverted cone or frustum-shaped cone. The waste discharge sample introduction assembly consists of a pressure gauge, a first three-way connector, an observation tube, a waste discharge valve, a second three-way connector, an injection valve, an injection tube, and an injection connector connected in sequence. The push-pull quick connector is connected to the upper part of the first three-way connector, and the observation tube is made of transparent material.
[0004] Moreover, the dimensions of the upper cylinder fixing ring and the lower cylinder fixing bracket are matched with the cylinder dimensions of the liquefied petroleum gas cylinder.
[0005] Furthermore, one end of the liquefied petroleum gas cylinder is equipped with a male push-pull quick connector; the push-pull quick connector on the bracket is a female connector that matches the male push-pull quick connector of the liquefied petroleum gas cylinder.
[0006] Furthermore, the observation tube is made of transparent glass, and the injection tube is made of stainless steel.
[0007] Furthermore, the waste discharge valve is a straight-through needle valve, and the sample injection valve is a straight-through ball valve.
[0008] Furthermore, the injection connector is compatible with the injection port of the gas chromatograph.
[0009] Furthermore, the connection structure between the lower cylinder fixing bracket and the support adopts a slider or snap-fit structure that can move up and down along the support.
[0010] Compared with existing technologies, the beneficial effects of this technical solution are as follows:
[0011] 1. By using an annular upper cylinder fixing ring and an inverted conical or frustum-shaped lower cylinder fixing bracket to restrict the position and assembly direction of the liquefied petroleum gas cylinder, the problem of steel liquefied petroleum gas cylinders being difficult to clamp is solved.
[0012] 2. The push-pull quick connector on the bracket is a female connector that matches the male connector of the push-pull quick connector of the liquefied petroleum gas cylinder, allowing the liquefied petroleum gas to directly enter the waste discharge and sample release component and release the sample, avoiding direct contact between the operator and the steel cylinder and avoiding the risk of frostbite during the vaporization process.
[0013] 3. The state of the sample can be clearly observed through the observation tube made of clear glass. The waste discharge valve is used to discharge impurities, and the injection valve is used to connect to the gas chromatograph. When liquid is observed to start flowing out, first open the waste discharge valve to remove impurities. After observing that the impurities have been discharged, close the waste discharge valve and open the injection valve to introduce the sample into the gas chromatograph system. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of an embodiment;
[0015] Figure 2 This is a schematic diagram of the structure of a liquefied petroleum gas cylinder;
[0016] Figure 3 A schematic diagram of the device structure after assembling liquefied petroleum gas cylinders;
[0017] Explanation of reference numerals in the attached figures:
[0018] 1. Upper cylinder fixing ring; 2. Lower cylinder fixing support; 3. Female of push-pull quick connector; 4. Pressure gauge; 5. Bracket; 6. Base; 7. First tee connector; 8. Observation tube; 9. Waste discharge valve; 10. Second tee connector; 11. Injection valve; 12. Injection tube; 13. Injection connector; 14. Male of push-pull quick connector; 15. Left straight needle valve; 16. Cylinder body; 17. Explosion-proof pressure relief device; 18. Right straight needle valve. Detailed Implementation
[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. However, the content of the present invention is not limited to the following embodiments.
[0020] A device for injecting liquefied petroleum gas into cylinders, such as Figure 1As shown, it includes at least a base 6 and a bracket 5 fixed to the base. The bracket, from top to bottom, is equipped with an upper cylinder fixing ring 1, a lower cylinder fixing support 2, a female connector 3 for a push-pull quick-connect fitting, and a waste discharge and sampling assembly. The upper cylinder fixing ring is annular, and the lower cylinder fixing support is an inverted cone or frustum-shaped cone. (Liquefied petroleum gas cylinders are shown...) Figure 2 As shown: The device consists of a male push-pull quick-connect coupling 14, a left-end straight-through needle valve 15, a cylinder body 16, an explosion-proof pressure relief device 17, and a right-end straight-through needle valve 18. The dimensions of the upper cylinder fixing ring and the lower cylinder fixing bracket match the dimensions of the liquefied petroleum gas cylinder body 16. The female push-pull quick-connect coupling 3 on the bracket matches the male push-pull quick-connect coupling 14 of the liquefied petroleum gas cylinder. The device after assembling the liquefied petroleum gas cylinder is as follows... Figure 3 As shown.
[0021] The waste discharge and sampling assembly is in Figure 1 From right to left, the assembly consists of a pressure gauge 4, a first tee connector 7, an observation tube 8, a waste discharge valve 9, a second tee connector 10, an injection valve 11, an injection tube 12, and an injection connector 13, connected in sequence. The lower end of the push-pull quick connector fixed on the bracket is connected to the upper part of the first tee connector. The left and right sides of the first tee connector are respectively an observation tube made of transparent glass and a stainless steel pressure gauge.
[0022] Moreover, the base is made of cast iron, the bracket is made of stainless steel, the base is arc-shaped, and the bracket is fixed to the middle of the arc-shaped cast iron base.
[0023] Furthermore, the waste discharge valve is a straight-through needle valve, and the sample injection valve is a straight-through ball valve.
[0024] Furthermore, the injection tube is made of stainless steel, and the injection connector is compatible with the injection port of the gas chromatograph.
[0025] Furthermore, the connection structure between the lower cylinder fixing bracket and the support adopts a slider or buckle structure that can move up and down along the support, so that the position of the lower cylinder fixing bracket can be adjusted up and down.
[0026] In use, insert the male end of the push-pull quick connector of the LPG cylinder downwards into the bracket. Secure and limit the LPG cylinder using the upper cylinder fixing ring and lower cylinder fixing support, which also facilitates quick connection between the female end of the push-pull quick connector and the male end of the LPG cylinder's push-pull quick connector. Then release the sample, monitor the pressure inside the cylinder using a pressure gauge, and observe the sample's condition through a transparent glass observation tube. Once liquid begins to flow from the glass observation window, first open the waste discharge valve and close the injection valve to remove impurities. After observing that all impurities have been removed (at least 30 seconds later), close the waste discharge valve and open the injection valve. Quickly connect the injection connector to the gas chromatograph to introduce the sample into the gas chromatography system.
[0027] Compared with existing technologies, the beneficial effects of this technical solution are as follows:
[0028] 1. By using an annular upper cylinder fixing ring and an inverted conical or frustum-shaped lower cylinder fixing bracket to restrict the position and assembly direction of the liquefied petroleum gas cylinder, the problem of steel liquefied petroleum gas cylinders being difficult to clamp is solved.
[0029] 2. The push-pull quick connector on the bracket is a female connector that matches the male connector of the push-pull quick connector of the liquefied petroleum gas cylinder, allowing the liquefied petroleum gas to directly enter the waste discharge and sample release component and release the sample, avoiding direct contact between the operator and the steel cylinder and avoiding the risk of frostbite during the vaporization process.
[0030] 3. The state of the sample can be clearly observed through the observation tube made of clear glass. The waste discharge valve is used to discharge impurities, and the injection valve is used to connect to the gas chromatograph. When liquid is observed to start flowing out, first open the waste discharge valve to remove impurities. After observing that the impurities have been discharged, close the waste discharge valve and open the injection valve to introduce the sample into the gas chromatograph system.
Claims
1. A device for liquefied petroleum gas cylinder sampling, comprising at least a base and a bracket fixed on the base, characterized in that: The support is provided with, from top to bottom, an upper cylinder fixing ring, a lower cylinder fixing support, a push-pull quick connector and a waste discharge and sample feeding assembly.
2. The device for liquefied petroleum gas cylinder sampling according to claim 1, characterized in that: The upper cylinder fixing ring and the lower cylinder fixing support are matched with the size of the bottle body of the liquefied petroleum gas cylinder.
3. The device for liquefied petroleum gas cylinder sampling according to claim 1, characterized in that: One end of the liquefied petroleum gas cylinder is provided with a male head of the push-pull quick connector; the push-pull quick connector provided on the support is a female seat matched with the male head of the push-pull quick connector of the liquefied petroleum gas cylinder.
4. The device for liquefied petroleum gas cylinder sampling according to claim 1, characterized in that: The observation tube is made of transparent glass material, and the sample feeding tube is made of stainless steel material.
5. The device for LPG cylinder filling according to claim 1, characterized in that: The waste discharge valve is a straight-through needle valve, and the sample feeding valve is a straight-through ball valve.
6. The device for LPG cylinder filling according to claim 1, characterized in that: The sample feeding connector is matched with the sample feeding port of the gas chromatograph analyzer.
7. The device for LPG cylinder filling according to claim 1, characterized in that: The connecting structure of the lower cylinder fixing support and the support adopts a sliding block or a buckle structure which can move up and down along the support.