Pressure control and flow limiting device for liquefied gas sampling

Abstract

The utility model discloses a kind of pressure control current limiting device for liquefied gas sampling, it is related to liquefied gas sampling technical field, including sampling tank, the both ends of sampling tank are respectively fixedly connected with air inlet pipe and air outlet pipe, the end of air inlet pipe and air outlet pipe is fixedly provided with connector, connector is provided with pressure assembly, the pressure assembly includes fixed disc, the fixed disc is fixedly connected by mounting assembly and connector, the inside of fixed disc is provided with the first through-hole compatible with connector. The utility model in use process, after staff is sleeved with hose outside connector, through the installation of pressure assembly, the connection stability of hose and connector is improved, solve the liquefied gas sampling of prior art, adopt the sleeving mode of hose and the connector of sampling device are connected with each other, under external force drag or the pressure of liquefied gas, hose is easy to fall off from connector, affect the problem of the smooth sampling of liquefied gas.

Description

Technical Field

[0001] This utility model relates to the field of liquefied gas sampling technology, and in particular to a pressure control and flow limiting device for liquefied gas sampling. Background Technology

[0002] To ensure product preservation quality, it is necessary to sample and test the liquid supplied by the liquefied gas source to ensure that the liquefied gas used has qualified composition and concentration.

[0003] The existing patent publication number CN223154535U, entitled "Liquefied Gas Sampling Device", proposes that the liquefied gas sampling device of this utility model has a simple structure and is easy to operate. During sampling, it can accurately control the flow rate, temperature and pressure of the sample, thereby improving the accuracy, safety, speed and reliability of sampling and detection.

[0004] Although the liquefied gas sampling device disclosed in the above patent can accurately control the flow rate, temperature and pressure of the sample, the hose is connected to the connector of the sampling device by a sleeve. Under external force or pressure of liquefied gas, the hose is easy to fall off the connector, which affects the smooth sampling of liquefied gas. Therefore, it is necessary to propose a pressure control and flow limiting device for liquefied gas sampling to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a pressure control and flow limiting device for liquefied gas sampling, so as to solve the problem mentioned in the background art that when sampling liquefied gas, the hose is connected to the connector of the sampling device by a sleeve method. Under external force or pressure of liquefied gas, the hose is easy to fall off the connector, which affects the smooth sampling of liquefied gas.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure control and flow limiting device for liquefied gas sampling, comprising a sampling tank, wherein an inlet pipe and an outlet pipe are fixedly connected to both ends of the sampling tank respectively, and a connector is fixedly provided at the ends of the inlet pipe and the outlet pipe, and a clamping component is provided on the connector. The clamping assembly includes a fixed plate, which is fixedly connected to the mounting assembly and a connector. The fixed plate has a first through hole adapted to the connector. A threaded post is fixedly installed at the center of the top of the fixed plate. A second through hole adapted to the connector is installed inside the threaded post. A threaded cylinder is threadedly connected to the outer ring of the threaded post. A column is fixedly installed at the top of the threaded post. A pressure plate is slidably installed inside the column. The pressure plate passes through both sides of the column. Limiting plates are fixedly installed on the upper and lower sides of the pressure plate. A limiting groove adapted to the limiting plate is opened inside the column. A spring is fixedly connected between the inner walls of the limiting plate and the limiting groove. An inclined surface is provided on the side of the pressure plate away from the connector.

[0007] Preferably, there is a gap between the pressure plate and the joint.

[0008] Preferably, an anti-slip strip is fixedly provided on the outer ring of the threaded cylinder, and a tapered groove is provided on the top of the threaded cylinder, the inner wall of which is movably fitted with the inclined surface.

[0009] Preferably, the mounting assembly includes a mounting plate, which is fixedly disposed on the outer ring at the bottom of the connector. The mounting plate and the fixed plate are fixedly connected by screws, and four screws are evenly distributed in a ring.

[0010] Preferably, a plurality of columns are provided, and the plurality of columns are evenly distributed in a ring.

[0011] Preferably, a handle is fixedly provided at the center of the outer rim of the sampling container.

[0012] Preferably, both the air inlet pipe and the air outlet pipe are equipped with valves, and the air inlet pipe is equipped with a pressure gauge.

[0013] The technical effects and advantages of this utility model are as follows: 1. After the worker attaches the hose to the outside of the connector, the threaded cylinder is rotated upwards. Because the top of the threaded cylinder is provided with a conical groove, the inner wall of the conical groove and the inclined surface are in contact, which forces the pressure plate to move towards the connector, thereby pressing the hose onto the connector and strengthening the connection between the hose and the connector. Because several columns are set and the columns are evenly distributed in a ring, multiple pressure plates can evenly press the hose, improving the connection stability between the hose and the connector. This solves the problem that in the existing technology for liquefied gas sampling, when the hose is connected to the connector of the sampling device by a hose sleeve, the hose is easy to fall off the connector under external force or liquefied gas pressure, which affects the smooth sampling of liquefied gas. 2. When it is necessary to remove the hose, rotate the threaded cylinder in the opposite direction to move it downward. After the threaded cylinder and the pressure plate are separated, the spring will restore its elasticity, which will drive the limit plate and the pressure plate to move away from the joint, loosening the hose and making it easier to remove the hose, thus improving the practicality of the device. 3. When this liquefied gas sampling pressure control and flow limiting device is not in use, rotate the threaded cylinder to the end position of the threaded column. At this time, the threaded cylinder covers the head of the connector, thereby preventing foreign objects from accidentally touching the head of the connector and causing damage to the connector, thus extending the service life of the device. 4. When the relevant parts on the clamping assembly are damaged, unscrew the screws to separate the mounting plate and the fixed plate. The fixed plate and threaded post can then be slid out from the head of the connector. After replacing the fixed plate and threaded post, the installation can be reversed, thereby improving the convenience of device maintenance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a pressure control and flow limiting device for liquefied gas sampling according to the present invention; Figure 2 For the present utility model Figure 1 Schematic diagram of a partial structure; Figure 3 This is a three-dimensional structural diagram of the threaded column and threaded cylinder of this utility model. Figure 4 This is a schematic diagram of the connector and mounting plate structure of this utility model; Figure 5 This is a schematic diagram of the disassembled structure of the threaded column and threaded cylinder of this utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the column of this utility model.

[0015] In the diagram: 1. Sampling container; 2. Inlet pipe; 3. Outlet pipe; 4. Valve; 5. Pressure gauge; 6. Handle; 7. Connector; 8. Mounting plate; 9. Fixing plate; 10. Screw; 11. Threaded post; 12. Threaded cylinder; 13. Anti-slip strip; 14. Column; 15. Limiting groove; 16. Limiting plate; 17. Spring; 18. Pressure plate; 19. Inclined surface. Detailed Implementation

[0016] 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.

[0017] This utility model provides, for example Figures 1-6 The device described is a pressure control and flow limiting device for liquefied petroleum gas (LPG) sampling. It includes a sampling tank 1, with an inlet pipe 2 and an outlet pipe 3 fixedly connected to both ends. Valves 4 are installed on both the inlet pipe 2 and the outlet pipe 3. A pressure gauge 5 is installed on the inlet pipe 2. Connectors 7 are fixedly installed at the ends of both the inlet pipe 2 and the outlet pipe 3. In use, the valve 4 on the inlet pipe 2 is first closed. The two ends of a flexible hose are then connected to the connector 7 on the outlet pipe 3 and an external air pump, respectively. After starting the air pump, a vacuum is created inside the sampling tank 1. The valve 4 on the outlet pipe 3 is then closed. Next, the two ends of the flexible hose are connected to the connector 7 on the inlet pipe 2 and an external LPG source, respectively. After turning on the switch on the LPG source, the valve 4 on the inlet pipe 2 is slowly opened. The LPG enters the sampling tank 1 through the flexible hose. The pressure gauge 5 is observed to ensure that the sampling pressure of the LPG is within a reasonable threshold, thus achieving the purpose of pressure control and flow limiting.

[0018] Considering that the hose is connected to the connector 7 by a sleeve, the hose is prone to falling off the connector 7 under external force or pressure of liquefied gas, which will affect the smooth sampling of liquefied gas. Therefore, this utility model provides a clamping component on the connector 7.

[0019] The clamping assembly includes a fixed plate 9, which is fixedly connected to a mounting assembly and a connector 7. The fixed plate 9 has a first through hole adapted to the connector 7. A threaded post 11 is fixedly installed in the middle of the top of the fixed plate 9. The threaded post 11 has a second through hole adapted to the connector 7. A threaded cylinder 12 is threadedly connected to the outer ring of the threaded post 11. A column 14 is fixedly installed on the top of the threaded post 11. A pressure plate 18 is slidably installed inside the column 14. The pressure plate 18 passes through both sides of the column 14. Limiting plates 16 are fixedly installed on the upper and lower sides of the pressure plate 18. A limiting groove 15 adapted to the limiting plate 16 is opened inside the column 14. A spring 17 is fixedly connected between the inner walls of the limiting plate 16 and the limiting groove 15. An inclined surface 19 is provided on the side of the pressure plate 18 away from the connector 7. There is a gap between the pressure plate 18 and the connector 7.

[0020] Specifically, after the worker attaches the hose to the outside of the connector 7, the threaded cylinder 12 is rotated upwards. Since the top of the threaded cylinder 12 is provided with a conical groove, the inner wall of the conical groove and the inclined surface 19 are in contact, thereby forcing the pressure plate 18 to move towards the connector 7, thus pressing the hose onto the connector 7 and strengthening the connection between the hose and the connector 7. Since several columns 14 are provided and the columns 14 are evenly distributed in a ring, multiple pressure plates 18 can evenly press the hose, improving the connection stability between the hose and the connector 7. This solves the problem in the existing technology of connecting the hose to the connector 7 of the sampling device when sampling liquefied gas. Under external force or pressure of liquefied gas, the hose is easy to fall off the connector 7, affecting the smooth sampling of liquefied gas.

[0021] When it is necessary to remove the hose, rotate the threaded cylinder 12 in the opposite direction to move it downward. After the threaded cylinder 12 and the pressure plate 18 are separated from each other, the spring 17 restores its elasticity, which drives the limit plate 16 and the pressure plate 18 to move away from the connector 7, loosening the hose and making it easier to remove the hose, thus improving the practicality of the device.

[0022] When this liquefied gas sampling pressure control and flow limiting device is not in use, rotate the threaded cylinder 12 to the end position of the threaded column 11. At this time, the threaded cylinder 12 covers the head of the connector 7, thereby preventing foreign objects from accidentally touching the head of the connector 7 and causing damage to the connector 7, thus extending the service life of the device.

[0023] Furthermore, an anti-slip strip 13 is fixedly provided on the outer ring of the threaded cylinder 12.

[0024] Furthermore, the installation assembly includes an installation plate 8, which is fixedly mounted on the outer ring at the bottom of the connector 7. The installation plate 8 and the fixed plate 9 are fixedly connected by screws 10. There are four screws 10 evenly distributed in a ring. When the relevant parts on the clamping assembly are damaged, the screws 10 are unscrewed to separate the installation plate 8 and the fixed plate 9. The fixed plate 9 and the threaded post 11 can then be slid out from the head of the connector 7. After replacing the new fixed plate 9 and the threaded post 11, the assembly can be reversed, thereby improving the convenience of device maintenance.

[0025] Furthermore, a handle 6 is fixedly installed in the middle of the outer ring of the sampling container 1.

[0026] Working Principle: In use, first close valve 4 on the inlet pipe 2. Connect the two ends of the hose to connector 7 on the outlet pipe 3 and the external air pump, respectively. After starting the air pump, evacuate the inside of the sampling tank 1. Then close valve 4 on the outlet pipe 3. Next, connect the two ends of the hose to connector 7 on the inlet pipe 2 and the external liquefied gas source, respectively. After turning on the switch on the liquefied gas source, slowly open valve 4 on the inlet pipe 2. The liquefied gas enters the sampling tank 1 through the hose. Observe the value of the pressure gauge 5 to ensure that the sampling pressure of the liquefied gas is within a reasonable threshold, thereby achieving the purpose of pressure control and flow limitation of the device. Additionally, after the operator connects the hose to the outside of connector 7, rotate the threaded cylinder 12 upwards, forcing the pressure plate 18 to move towards connector 7, thereby pressing the hose tightly. On connector 7, the connection strength between the hose and connector 7 is reinforced. Since several columns 14 are set and evenly distributed in a ring, multiple pressure plates 18 can evenly press the hose, improving the connection stability between the hose and connector 7. When the hose needs to be removed, the threaded cylinder 12 is rotated in the opposite direction and moved downward. After the threaded cylinder 12 and the pressure plate 18 are separated, the spring 17 restores its elasticity, driving the limiting plate 16 and the pressure plate 18 to move away from connector 7, loosening the hose and making it easier to remove. When this liquefied gas sampling pressure control and flow limiting device is not in use, the threaded cylinder 12 is rotated to the end position of the threaded column 11. At this time, the threaded cylinder 12 covers the head of connector 7, thereby preventing foreign objects from accidentally hitting the head of connector 7 and causing damage to connector 7, thus extending the service life of the device.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressure-controlled and flow-limiting device for liquefied gas sampling, comprising a sampling tank (1), characterized in that: The sampling container (1) is fixedly connected to an air inlet pipe (2) and an air outlet pipe (3) at both ends. The ends of the air inlet pipe (2) and the air outlet pipe (3) are fixedly provided with connectors (7), and the connectors (7) are provided with clamping components. The clamping assembly includes a fixed plate (9), which is fixedly connected to a mounting assembly and a connector (7). The fixed plate (9) has a first through hole adapted to the connector (7) inside. A threaded post (11) is fixedly installed at the center of the top of the fixed plate (9). A second through hole adapted to the connector (7) is opened inside the threaded post (11). A threaded cylinder (12) is threadedly connected to the outer ring of the threaded post (11). A column (1) is fixedly installed at the top of the threaded post (11). 4) A pressure plate (18) is slidably provided inside the column (14). The pressure plate (18) passes through both sides of the column (14). Limiting plates (16) are fixedly provided on the upper and lower sides of the pressure plate (18). A limiting groove (15) adapted to the limiting plate (16) is opened inside the column (14). A spring (17) is fixedly connected between the inner walls of the limiting plate (16) and the limiting groove (15). An inclined surface (19) is provided on the side of the pressure plate (18) away from the joint (7).

2. The pressure-controlled and flow-limiting device for liquefied gas sampling according to claim 1, characterized in that: There is a gap between the pressure plate (18) and the connector (7).

3. The pressure-controlled and flow-limiting device for liquefied gas sampling according to claim 1, characterized in that: An anti-slip strip (13) is fixedly provided on the outer ring of the threaded cylinder (12), and a conical groove is provided on the top of the threaded cylinder (12), the inner wall of the conical groove and the inclined surface (19) are movably fitted together.

4. A pressure-controlled and flow-limiting device for liquefied gas sampling according to claim 1, characterized in that: The installation assembly includes an installation plate (8), which is fixedly disposed on the outer ring of the bottom of the connector (7). The installation plate (8) and the fixing plate (9) are fixedly connected by screws (10), and four screws (10) are evenly distributed in a ring.

5. A pressure-controlled and flow-limiting device for liquefied gas sampling according to claim 1, characterized in that: Several columns (14) are provided, and the columns (14) are evenly distributed in a ring.

6. A pressure-controlled and flow-limiting device for liquefied gas sampling according to claim 1, characterized in that: A handle (6) is fixedly installed in the middle of the outer ring of the sampling container (1).

7. A pressure-controlled and flow-limiting device for liquefied gas sampling according to claim 1, characterized in that: Valves (4) are provided on both the air inlet pipe (2) and the air outlet pipe (3), and a pressure gauge (5) is provided on the air inlet pipe (2).

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