Sampling device for natural gas detection

Abstract

The utility model relates to the technical field of natural gas sampling, in particular to a sampling device for natural gas detection, which comprises a connecting pipe, a gas storage cylinder, a one-way valve, a sampling cylinder and a sampling component, the sampling assembly comprises a sealing spring, a sealing seat, a reset spring, a piston, an ejector rod, an abutting spring and a locking component, the sealing seat is slidably connected with the connecting pipe, the two ends of the sealing spring are connected with the sealing seat and the connecting pipe respectively, the sealing spring is located in the connecting pipe, the piston is slidably connected with the air reservoir, and the two ends of the reset spring are connected with the air reservoir and the piston respectively; the ejector rod is slidably connected with the gas storage cylinder, the two ends of the abutting spring are connected with the ejector rod and the gas storage cylinder correspondingly, the piston ascends to drive the ejector rod to ascend, at the moment, the sealing base ascends under the action of the sealing spring, then the connecting pipe is sealed, and after the gas storage cylinder is filled with natural gas, the connecting pipe can be automatically sealed; the problem of natural gas leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas sampling, in particular to a sampling device for natural gas detection. Background Art

[0002] Natural gas is transported through pipelines. When testing the natural gas in the pipeline, it is necessary to take samples through a sampling device. Traditional sampling devices cannot take samples quickly, and natural gas keeps spraying out, posing a risk of leakage.

[0003] Prior art CN220136771U discloses a natural gas sampling device, which relates to the field of natural gas sampling. The natural gas sampling device includes a transport pipe, a temporary storage tank is fixedly connected to the top of the transport pipe, a connecting pipe is fixedly connected to the bottom of the temporary storage tank, the connecting pipe runs through the transport pipe and is fixedly connected to the transport pipe, a connector is fixedly connected to the bottom end of the temporary storage tank, a bracket is fixedly connected to the bottom end of the temporary storage tank, a threaded rod is threadedly connected to the inside of the bracket, an air intake head is fixedly connected to the bottom end of the threaded rod, the air intake head is adapted to the connector, and the air intake head is adapted to the bracket. The natural gas sampling device uses a vacuum pump to draw the natural gas inside the temporary storage tank into the sampling box for collection, which is convenient for subsequent detection, and is conducive to the separation and sampling of natural gas samples, improving safety, preventing natural gas leakage, and facilitating the control of output.

[0004] The above-mentioned device drives the threaded rod to rotate by turning the handle, and the rise of the threaded rod drives the air inlet head to rise, so that the natural gas can enter the temporary storage tank, and then the natural gas inside the temporary storage tank is pumped into the sampling box through the vacuum pump. However, when the temporary storage tank is filled with natural gas, the staff needs to manually turn the handle to close the temporary storage tank. The staff cannot directly judge whether the temporary storage tank is full of natural gas, and forgetting to close the temporary storage tank is likely to cause natural gas leakage. Utility Model Content

[0005] The utility model aims to provide a sampling device for natural gas detection, which solves the problem that the existing natural gas sampling device cannot directly determine whether the temporary storage tank is full of natural gas, and forgetting to close the temporary storage tank easily leads to natural gas leakage.

[0006] To achieve the above-mentioned purpose, the utility model provides a sampling device for natural gas detection, comprising a connecting pipe, a gas cylinder, a one-way valve and a sampling cylinder, wherein the gas cylinder is installed on the connecting pipe, the one-way valve is installed on the gas cylinder, and the sampling cylinder is installed on the one-way valve, and also comprises a sampling assembly; the sampling assembly comprises a sealing spring, a sealing seat, a return spring, a piston, a push rod, an abutment spring and a locking member, wherein the sealing seat is slidably connected to the connecting pipe and is located inside the connecting pipe, the two ends of the sealing spring are respectively connected to the sealing seat and the connecting pipe, the sealing spring is located inside the connecting pipe, the piston is slidably connected to the gas cylinder and is located inside the gas cylinder, the two ends of the return spring are respectively connected to the gas cylinder and the piston, and are located inside the gas cylinder, the push rod is slidably connected to the gas cylinder and is arranged on the gas cylinder, the two ends of the abutment spring are respectively connected to the push rod and the gas cylinder, the abutment spring is sleeved on the push rod, and the locking member is arranged on the gas cylinder.

[0007] Wherein, the air cylinder has a sealing boss, which is arranged on the air cylinder and located inside the air cylinder; the sampling component also includes a sealing gasket, which is fixedly connected to the air cylinder and located on one side of the air cylinder close to the sealing boss.

[0008] Among them, the push rod includes a rod body, an abutment plate and a limit strip, the rod body is slidably connected to the air cylinder and is arranged on the air cylinder; the abutment plate is fixedly connected to the rod body, connected to the abutment spring, and is arranged on the rod body; the limit strip is fixedly connected to the rod body and is located on one side of the rod body.

[0009] Wherein, the sealing seat has a limiting protrusion, which is arranged on the sealing seat and located on one side of the sealing seat; the connecting pipe has a limiting groove, which is arranged on the connecting pipe and located on one side of the connecting pipe close to the limiting protrusion, and the limiting groove cooperates with the limiting protrusion.

[0010] Among them, the locking component includes a fixed seat, a pull rod and a locking spring, the fixed seat is fixedly connected to the air cylinder and is located on one side of the air cylinder; the pull rod is slidably connected to the fixed seat and is arranged on the fixed seat; the two ends of the locking spring are respectively connected to the pull rod and the fixed seat, and the locking spring is sleeved on the pull rod.

[0011] The utility model provides a sampling device for natural gas detection. When sampling, the locking member locks the push rod, so that the push rod moves downward under the action of the abutment spring, and then the push rod drives the sealing seat to move downward. When the sealing seat moves out of the through hole on the connecting pipe, the connecting pipe is connected with the gas storage cylinder. At this time, the natural gas inside the natural gas pipeline can enter the gas storage cylinder through the connecting pipe. When the natural gas enters the gas storage cylinder, the piston moves upward and squeezes the reset spring. When the piston moves to abut the push rod, the piston can drive the push rod to move upward, so that the sealing seat can be moved in the sealing spring. The piston then moves upward under the action of the sealing seat, thereby sealing the connecting pipe. When the connecting pipe is sealed by the sealing seat, the push rod is locked by the locking member. At this time, the inside of the gas cylinder is full of natural gas, and the connecting pipe is also sealed. Finally, the one-way valve is opened to make the piston descend under the action of the return spring, and then the natural gas inside the gas cylinder is pushed into the sampling cylinder, thereby completing the sampling. The push rod is driven up by the rise of the piston. At this time, the sealing seat rises under the action of the sealing spring, and then the connecting pipe is sealed. After the gas cylinder is filled with natural gas, the connecting pipe can be automatically sealed to avoid the problem of natural gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is a schematic diagram of the overall structure of a sampling device for natural gas detection according to the first embodiment of the utility model.

[0014] Figure 2 It is a schematic structural diagram of the sampling assembly of the first embodiment of the utility model.

[0015] Figure 3 The first embodiment of the utility model Figure 2 Enlarged view of point A.

[0016] Figure 4 It is a schematic diagram of the installation structure of the sealing spring of the first embodiment of the utility model.

[0017] Figure 5 It is a schematic diagram of the installation structure of the abutment spring of the first embodiment of the utility model.

[0018] Figure 6 It is a schematic diagram of the installation structure of the pull rod of the second embodiment of the utility model.

[0019] In the figure: 100-natural gas pipeline, 101-connecting pipe, 102-gas cylinder, 103-one-way valve, 104-sampling cylinder, 105-sampling assembly, 106-sealing spring, 107-sealing seat, 108-reset spring, 109-piston, 110-top rod, 111-abutment spring, 112-locking member, 113-sealing boss, 114-sealing pad, 115-rod body, 116-abutment plate, 117-limiting strip, 118-limiting protrusion, 119-limiting groove, 201-fixed seat, 202-pull rod, 203-locking spring. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] First embodiment:

[0022] See also Figures 1 to 5 ,in Figure 1 It is a schematic diagram of the overall structure of the sampling device for natural gas detection. Figure 2 It is a schematic diagram of the structure of the sampling component. Figure 3 yes Figure 2 A magnified image of Figure 4 This is a schematic diagram of the installation structure of the sealing spring. Figure 5 It is a schematic diagram of the installation structure of the abutment spring.

[0023] The utility model provides a sampling device for natural gas detection, including a connecting pipe 101, a gas storage cylinder 102, a one-way valve 103, a sampling cylinder 104 and a sampling assembly 105, wherein the sampling assembly 105 includes a sealing spring 106, a sealing seat 107, a reset spring 108, a piston 109, a push rod 110, an abutment spring 111, a locking member 112 and a sealing pad 114, the gas storage cylinder 102 has a sealing boss 113, the push rod 110 includes a rod body 115, an abutment plate 116 and a limit strip 117, the sealing seat 107 has a limit protrusion 118, the connecting pipe 101 includes a connecting pipe 102, a one-way valve 103, a sampling cylinder 104 and a sampling assembly 105, ... The connecting pipe 101 has a limiting groove 119. When the natural gas inside the natural gas pipeline 100 enters the gas storage cylinder 102, the piston 109 moves upward. When the piston 109 abuts against the push rod 110, it drives the push rod 110 to move upward. At this time, the sealing seat 107 can rise under the action of the sealing spring 106, thereby sealing the connecting pipe 101. It can be understood that the above-mentioned scheme can be used to automatically seal the connecting pipe 101 to avoid natural gas leakage, and can also be used to solve the problem of locking the push rod 110.

[0024] According to this specific embodiment, the gas cylinder 102 is installed on the connecting pipe 101, the one-way valve 103 is installed on the gas cylinder 102, the sampling cylinder 104 is installed on the one-way valve 103, the connecting pipe 101 is connected to the natural gas pipeline 100, the sampling cylinder 104 is connected to the connecting pipe 101, and the one-way valve 103 is respectively connected to the sampling cylinder 104 and the gas cylinder 102.

[0025] The sealing seat 107 is slidably connected to the connecting tube 101 and is located inside the connecting tube 101. The two ends of the sealing spring 106 are respectively connected to the sealing seat 107 and the connecting tube 101. The sealing spring 106 is located inside the connecting tube 101. The piston 109 is slidably connected to the gas cylinder 102 and is located inside the gas cylinder 102. The two ends of the return spring 108 are respectively connected to the gas cylinder 102 and the piston 109. The push rod 110 is slidably connected to the gas cylinder 102 and is arranged on the gas cylinder 102. The two ends of the abutment spring 111 are respectively connected to the push rod 110 and the piston 109. The connecting tube 101 is connected to the gas storage cylinder 102, the abutting spring 111 is sleeved on the push rod 110, and the locking member 112 is arranged on the gas storage cylinder 102; the locking member 112 can lock the push rod 110, the stiffness coefficient of the abutting spring 111 is greater than that of the sealing spring 106, and a through hole is arranged on the connecting tube 101. When sampling is not performed, the push rod 110 is locked by the locking member 112, and at this time, the sealing seat 107 is driven by the sealing spring 106 to move upward, so that the sealing seat 107 extends into the through hole on the connecting tube 101, so that the sealing seat 107 seals the connecting tube 101;When sampling, the locking member 112 is released from the locking of the push rod 110, so that the push rod 110 moves downward under the action of the abutting spring 111, and then the push rod 110 drives the sealing seat 107 to move downward. When the sealing seat 107 moves out of the through hole on the connecting pipe 101, the connecting pipe 101 is connected with the gas storage cylinder 102. At this time, the natural gas inside the natural gas pipeline 100 can enter the gas storage cylinder 102 through the connecting pipe 101. When the natural gas enters the gas storage cylinder 102, the piston 109 moves upward and squeezes the reset spring 108. When the piston 109 moves to abut the push rod 110, the piston 109 can drive the push rod 110 to move upward, so that the sealing seat 107 can move downward under the action of the sealing spring 106. The connecting pipe 101 is sealed by the sealing seat 107, and the push rod 110 is locked by the locking member 112. At this time, the gas cylinder 102 is filled with natural gas, and the connecting pipe 101 is also sealed. Finally, the one-way valve 103 is opened, and the piston 109 is lowered under the action of the return spring 108, and the natural gas in the gas cylinder 102 is pushed into the sampling cylinder 104, so as to complete the sampling. The push rod 110 is driven to rise by the rise of the piston 109. At this time, the sealing seat 107 rises under the action of the sealing spring 106, and the connecting pipe 101 is sealed. After the gas cylinder 102 is filled with natural gas, the connecting pipe 101 can be automatically sealed to avoid the problem of natural gas leakage. ;

[0026] Secondly, the sealing boss 113 is arranged on the gas cylinder 102 and is located inside the gas cylinder 102; the sampling assembly 105 also includes a sealing gasket 114, which is fixedly connected to the gas cylinder 102 and is located on a side of the gas cylinder 102 close to the sealing boss 113. When the piston 109 rises to abut against the sealing gasket 114, the sealing gasket 114 is used to seal the gap between the piston 109 and the gas cylinder 102 to prevent natural gas from leaking from the gas cylinder 102.

[0027] At the same time, the rod body 115 is slidably connected to the gas cylinder 102 and is arranged on the gas cylinder 102; the abutment plate 116 is fixedly connected to the rod body 115, connected to the abutment spring 111, and is arranged on the rod body 115; the limit strip 117 is fixedly connected to the rod body 115 and is located on one side of the rod body 115; when the piston 109 rises to abut against the abutment plate 116, the rise of the piston 109 will drive the abutment plate 116 to rise, and then drive the rod body 115 to rise, and the rod body 115 is limited by the limit strip 117, so that the rod body 115 can only move vertically up and down, thereby preventing the rod body 115 from rotating on the gas cylinder 102.

[0028] In addition, the limiting protrusion 118 is arranged on the sealing seat 107 and is located on one side of the sealing seat 107; the limiting groove 119 is arranged on the connecting tube 101 and is located on the side of the connecting tube 101 close to the limiting protrusion 118, and the limiting groove 119 cooperates with the limiting protrusion 118; the limiting protrusion 118 is located in the limiting groove 119, and the limiting protrusion 118 is limited by the limiting groove 119, and then the sealing seat 107 is limited, so that the sealing seat 107 can only move vertically, and the sealing seat 107 is prevented from rotating, thereby improving the stability of the sealing seat 107 when moving.

[0029] When using the natural gas detection sampling device of this embodiment, the locking of the push rod 110 is released, so that the push rod 110 moves downward under the action of the abutment spring 111, and then the sealing seat 107 is pushed open. At this time, the natural gas inside the natural gas pipeline 100 can enter the gas storage cylinder 102 through the connecting pipe 101. When the natural gas enters the gas storage cylinder 102, the piston 109 rises. When the piston 109 abuts the abutment plate 116, it drives the abutment plate 116 to rise, so that the abutment plate 116 drives the rod body 115 to rise. At this time, the sealing seat 107 can rise under the action of the sealing spring 106, and then the connecting pipe 101 is re-sealed, so that the connecting pipe 101 is automatically sealed after the gas storage cylinder 102 is filled with natural gas, thereby avoiding the problem of natural gas leakage.

[0030] Second embodiment:

[0031] Based on the first embodiment, please refer to Figure 6 , Figure 6 2 is a schematic diagram of the installation structure of the pull rod of the second embodiment. The locking member 112 of this embodiment includes a fixing seat 201 , a pull rod 202 and a locking spring 203 .

[0032] According to this specific embodiment, the fixed seat 201 is fixedly connected to the air cylinder 102 and is located on one side of the air cylinder 102; the pull rod 202 is slidably connected to the fixed seat 201 and is arranged on the fixed seat 201; the two ends of the locking spring 203 are respectively connected to the pull rod 202 and the fixed seat 201, and the locking spring 203 is sleeved on the pull rod 202; the rod body 115 is provided with a locking groove that cooperates with the pull rod 202. When the piston 109 drives the abutment plate 116 and the rod body 115 to rise, the locking groove on the rod body 115 rises accordingly. When the locking groove is aligned with the pull rod 202, the pull rod 202 can be extended into the locking groove under the action of the locking spring 203, thereby locking the rod body 115.

[0033] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A sampling device for natural gas detection, comprising a connecting pipe, a gas storage cylinder, a one-way valve and a sampling cylinder, wherein the gas storage cylinder is mounted on the connecting pipe, the one-way valve is mounted on the gas storage cylinder, and the sampling cylinder is mounted on the one-way valve, characterized in that: Also included is a sampling assembly; The sampling assembly includes a sealing spring, a sealing seat, a return spring, a piston, a push rod, an abutment spring and a locking member. The sealing seat is slidably connected to the connecting tube and is located inside the connecting tube. The two ends of the sealing spring are respectively connected to the sealing seat and the connecting tube. The sealing spring is located inside the connecting tube. The piston is slidably connected to the air cylinder and is located inside the air cylinder. The two ends of the return spring are respectively connected to the air cylinder and the piston and are located inside the air cylinder. The push rod is slidably connected to the air cylinder and is arranged on the air cylinder. The two ends of the abutment spring are respectively connected to the push rod and the air cylinder. The abutment spring is sleeved on the push rod, and the locking member is arranged on the air cylinder.

2. The natural gas detection sampling device according to claim 1, characterized in that: The gas cylinder has a sealing boss, which is arranged on the gas cylinder and located inside the gas cylinder; the sampling component also includes a sealing gasket, which is fixedly connected to the gas cylinder and located on one side of the gas cylinder close to the sealing boss.

3. The natural gas detection sampling device according to claim 1, characterized in that: The push rod includes a rod body, an abutment plate and a limit strip. The rod body is slidably connected to the air cylinder and is arranged on the air cylinder; the abutment plate is fixedly connected to the rod body, connected to the abutment spring, and is arranged on the rod body; the limit strip is fixedly connected to the rod body and is located on one side of the rod body.

4. The sampling device for natural gas detection according to claim 1, characterized in that: The sealing seat has a limiting protrusion, which is arranged on the sealing seat and located on one side of the sealing seat; the connecting pipe has a limiting groove, which is arranged on the connecting pipe and located on one side of the connecting pipe close to the limiting protrusion, and the limiting groove cooperates with the limiting protrusion.

5. The sampling device for natural gas detection according to claim 1, characterized in that: The locking component includes a fixed seat, a pull rod and a locking spring. The fixed seat is fixedly connected to the air cylinder and is located on one side of the air cylinder; the pull rod is slidably connected to the fixed seat and is arranged on the fixed seat; the two ends of the locking spring are respectively connected to the pull rod and the fixed seat, and the locking spring is sleeved on the pull rod.

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