Natural gas sampling device

Abstract

The utility model relates to a natural gas sampling device which comprises a connecting pipe, a hole is formed in the upper portion of the connecting pipe, a gas outlet pipe is fixedly installed, and a sampling pipe is installed at one end of the gas outlet pipe in a threaded mode. According to the natural gas sampling device, a first valve and a second valve are clamped in an inner cavity of a gas outlet pipe and an inner cavity of a sampling pipe respectively, a rotating shaft matched with one end of the first valve and one end of the second valve penetrates through and is rotationally connected with the gas outlet pipe and the sampling pipe respectively, one end of the rotating shaft is rotationally connected with a driven gear, and a driving gear rotationally connected with one end of a rotating rod is meshed with the driven gear; when a pointer in a flow valve points to a set value, the motor drives the first valve to rotate to be horizontal, a channel in a gas outlet pipe is closed, at the moment, the other main gear drives the second valve to deflect, and natural gas is conveyed into the sampling pipe. Therefore, the natural gas in the sampling pipe is collected into the sampling bottle connected with the top of the sampling pipe, and accurate sampling is further realized.

Description

Technical Field

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

[0002] Natural gas is a clean and efficient energy source, mainly composed of methane, which usually exists in gaseous form in underground rocks. It has high calorific value, low pollution and low carbon emissions. Compared with traditional energy sources such as coal and oil, the combustion of natural gas produces much less carbon dioxide and other pollutants. In terms of industrial use, natural gas can be used as fuel or raw material; in terms of urban heating, natural gas can be burned and converted into heat energy, which is supplied to residential, commercial buildings and public places for heating.

[0003] In order to ensure the quality and safety of natural gas, as well as the safety of its extraction and processing, it is necessary to sample and evaluate the natural gas. Since natural gas is transported through pipelines, in the existing sampling process, a connecting pipe is installed at one end or the middle of the pipeline, and the outlet extending from the upper part of the connecting pipe is connected to the switch valve, so that the natural gas in the pipeline can be sampled. However, this method is prone to inaccurate sampling density during sampling, and is also prone to gas leakage. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a natural gas sampling device, which has the advantages of being facilitating safe and accurate sampling and reducing natural gas leakage, and solves the problem that the prior sampling devices are inaccurate and prone to leakage.

[0005] To achieve the above object, the utility model provides the following technical solutions: a natural gas sampling device, comprising a connecting pipe, an outlet pipe is fixedly installed in an opening on the upper part of the connecting pipe, a sampling pipe is threadedly installed at one end of the outlet pipe, a first valve is clamped on the inner wall of the outlet pipe, and a second valve is clamped on the inner wall of the top end of the sampling pipe;

[0006] A bracket is movably mounted on the upper part of the connecting pipe, a motor is movably mounted in the middle part of the bracket, and an output shaft of the motor is rotatably connected to a rotating rod.

[0007] Furthermore, a hole is opened in the middle of the sampling tube and a flow valve is movably installed thereon, and a flow guide hole is opened at the bottom of the sampling tube.

[0008] Furthermore, a rubber ring is provided at the top of the air outlet pipe, and the rubber ring fits the bottom end of the guide hole.

[0009] Furthermore, the motor is a dual-axis motor, and one end of the rotating rod is rotatably connected to a main gear.

[0010] Furthermore, the rotating shafts at one end of the first valve and the second valve are rotatably connected to the air outlet pipe and the sampling tube respectively, and the rotating shafts at one end of the first valve and the second valve are rotatably connected to a slave gear.

[0011] Furthermore, the main gear and the slave gear are both bevel gears, and the gear teeth of the main gear and the slave gear are meshed.

[0012] Furthermore, a protective cover is sleeved on the top of the sampling tube.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The natural gas sampling device movably installs the connecting pipe on the conveying pipe, and sets an outlet pipe assembled on the upper part of the connecting pipe. The sampling pipe is threadedly installed at one end of the outlet pipe, and a guide hole is opened at the bottom of the sampling pipe. A rubber ring is set at the connection between the outlet pipe and the sampling pipe to fit the bottom of the guide hole, and a protective cover is sleeved on the top of the sampling pipe, thereby increasing the sealing between the outlet pipe and the sampling pipe, preventing dust and other impurities from entering the sampling pipe, and preventing natural gas leakage.

[0015] 2. The natural gas sampling device is provided with an outlet pipe and an inner cavity of the sampling pipe to respectively clamp the first valve and the second valve, and the rotating shafts at one end of the first valve and the second valve respectively penetrate and rotate to connect the outlet pipe and the sampling pipe, one end of the rotating shaft is rotatably connected to a slave gear, and a main gear rotatably connected to one end of the rotating rod is meshed with the slave gear, so that the main gear is driven to rotate by a motor, and the main gear drives the first valve to deflect, and the natural gas is transmitted to the sampling pipe. When the pointer in the flow valve points to the set value, the motor drives the first valve to rotate to the horizontal, closing the channel in the outlet pipe. At this time, the other main gear drives the second valve to deflect, so that the natural gas in the sampling pipe is collected in the sampling bottle connected to the top of the sampling pipe, thereby realizing accurate sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure disassembly of the utility model;

[0019] Figure 4 This is a schematic diagram of the sampling tube structure of the utility model;

[0020] In the figure: 1. connecting pipe; 2. air outlet pipe; 21. rubber ring; 3. sampling tube; 31. flow valve; 32. guide hole; 4. protective cover; 5. bracket; 6. motor; 61. rotating rod; 62. main gear; 7. first valve; 8. second valve; 9. slave gear. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 A natural gas sampling device in this embodiment includes a connecting pipe 1, an outlet pipe 2 is fixedly installed in an opening on the upper part of the connecting pipe 1, a sampling pipe 3 is threadedly installed at one end of the outlet pipe 2, a first valve 7 is clamped on the inner wall of the outlet pipe 2, and a second valve 8 is clamped on the inner wall of the top end of the sampling pipe 3;

[0023] A bracket 5 is movably mounted on the upper part of the connecting pipe 1 , a motor 6 is movably mounted in the middle part of the bracket 5 , and an output shaft of the motor 6 is rotatably connected to a rotating rod 61 .

[0024] In this embodiment, the connecting pipe 1 is movably installed on the conveying pipe, and an air outlet pipe 2 is provided on the upper part of the connecting pipe 1. A sampling pipe 3 is threadedly installed at one end of the air outlet pipe 2. A guide hole 32 is provided at the bottom of the sampling pipe 3. A rubber ring 21 is provided at the connection between the air outlet pipe 2 and the sampling pipe 3 to fit the bottom of the guide hole 32. A protective cover 4 is sleeved on the top of the sampling pipe 3, thereby increasing the sealing between the air outlet pipe 2 and the sampling pipe 3, preventing dust and other impurities from entering the sampling pipe 3, and preventing leakage of natural gas.

[0025] The first valve 7 and the second valve 8 are respectively clamped in the inner cavity of the gas outlet pipe 2 and the sampling tube 3 by arranging the first valve 7 and the second valve 8, and the rotating shafts at one end of the first valve 7 and the second valve 8 penetrate and rotate to connect the gas outlet pipe 2 and the sampling tube 3 respectively. One end of the rotating shaft is rotatably connected with a slave gear 9, and the output shaft of the motor 6 is rotatably connected to the rotating rod 61. The main gear 62 rotatably connected to one end of the rotating rod 61 is meshed with the slave gear 9, so that the main gear 62 is driven by the motor 6 to rotate, and the main gear 62 drives the first valve 7 to deflect, and the natural gas is transmitted to the sampling tube 3. The flow valve 31 is assembled with the opening in the middle of the sampling tube 3. When the pointer in the flow valve 31 points to the set value, the motor 6 drives the first valve 7 to rotate to the horizontal, closing the channel in the gas outlet pipe 2. At this time, the other main gear 62 drives the second valve 8 to deflect, so that the natural gas in the sampling tube 3 is collected in the sampling bottle connected to the top of the sampling tube 3, thereby realizing accurate sampling.

[0026] See also Figure 2-3 In order to prevent the leakage of natural gas before, during and after sampling, the rubber ring 21, the flow guide hole 32 and the protective cover 4 in this embodiment are provided;

[0027] The sampling tube 3 has an opening in the middle and a flow valve 31 movably installed thereon. A flow guide hole 32 is provided at the bottom of the sampling tube 3. A rubber ring 21 is provided at the top of the air outlet pipe 2. The rubber ring 21 fits the bottom of the flow guide hole 32. A protective cover 4 is sleeved on the top of the sampling tube 3.

[0028] In this embodiment, a rubber ring 21 is provided at the top of the air outlet pipe 2 to fit with the guide hole 32 opened at the bottom of the sampling tube 3, so that the sealing of the connection between the air outlet pipe 2 and the sampling tube 3 is increased, and a protective cover 4 is sleeved on the top of the sampling tube 3, which not only prevents dust from entering the sampling tube 3 when not in use, but also prevents natural gas leakage.

[0029] See also Figure 2-4 , in order to accurately sample during sampling, in this embodiment, the flow valve 31, the main gear 62, the first valve 7, the second valve 8, and the slave gear 9;

[0030] The motor 6 is a dual-axis motor, one end of the rotating rod 61 is rotatably connected to the main gear 62, the rotating shafts at one end of the first valve 7 and the second valve 8 are rotatably connected to the outlet pipe 2 and the sampling tube 3 respectively, the rotating shafts at one end of the first valve 7 and the second valve 8 are rotatably connected to a slave gear 9, the main gear 62 and the slave gear 9 are both bevel gears, and the gear teeth of the main gear 62 and the slave gear 9 are meshed.

[0031] In this embodiment, the rotating shafts at one end of the first valve 7 and the second valve 8 are respectively rotatably connected to the outlet pipe 2 and the sampling pipe 3, and one end of the rotating shaft is rotatably connected to a slave gear 9, and the main gear 62 rotatably connected to one end of the rotating rod 61 is meshed with the slave gear 9. The middle part of the sampling pipe 3 is opened and a flow valve 31 is movably installed, so that the main gear 62 is driven to rotate by the motor 6, and the main gear 62 drives the first valve 7 and the second valve 8 to deflect respectively through the slave gear 9, so that the natural gas in the connecting pipe 1 is transported to the sampling pipe 3 through the outlet pipe 2. At this time, the second valve 8 is in a closed state, and the flow valve 31 detects the gas content in the sampling pipe 3. When the set value is reached, the motor 6 drives the first valve 7 to close and the second valve 8 to open, so that it is convenient for the sampling bottle connected to the top of the sampling pipe 3 to collect natural gas, thereby realizing accurate sampling of natural gas.

[0032] The working principle of the above embodiment is:

[0033] 1. The connecting pipe 1 is movably installed on the conveying pipe, and an air outlet pipe 2 is installed on the upper part of the connecting pipe 1. A sampling tube 3 is threadedly installed at one end of the air outlet pipe 2. A guide hole 32 is opened at the bottom of the sampling tube 3. A rubber ring 21 is arranged at the connection between the air outlet pipe 2 and the sampling tube 3 to fit the bottom of the guide hole 32. A protective cover 4 is sleeved on the top of the sampling tube 3, thereby increasing the sealing between the air outlet pipe 2 and the sampling tube 3, preventing dust and other impurities from entering the sampling tube 3, and preventing leakage of natural gas.

[0034] 2. The first valve 7 and the second valve 8 are respectively clamped in the inner cavity of the gas outlet pipe 2 and the sampling tube 3 by setting the first valve 7 and the second valve 8, and the rotating shafts at one end of the first valve 7 and the second valve 8 penetrate and rotate to connect the gas outlet pipe 2 and the sampling tube 3 respectively. One end of the rotating shaft is rotatably connected with a slave gear 9, and the output shaft of the motor 6 is rotatably connected to the rotating rod 61. The main gear 62 rotatably connected to one end of the rotating rod 61 is meshed with the slave gear 9, so that the main gear 62 is driven by the motor 6 to rotate, and the main gear 62 drives the first valve 7 to deflect, and the natural gas is transmitted to the sampling tube 3. The flow valve 31 is assembled with the opening in the middle of the sampling tube 3. When the pointer in the flow valve 31 points to the set value, the motor 6 drives the first valve 7 to rotate to the horizontal position, closing the channel in the gas outlet pipe 2. At this time, the other main gear 62 drives the second valve 8 to deflect, so that the natural gas in the sampling tube 3 is collected in the sampling bottle connected to the top of the sampling tube 3, thereby realizing accurate sampling.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas sampling device, comprising a connecting pipe (1), characterized in that: An air outlet pipe (2) is fixedly mounted on the upper opening of the connecting pipe (1), a sampling pipe (3) is threadedly mounted on one end of the air outlet pipe (2), a first valve (7) is clamped on the inner wall of the air outlet pipe (2), and a second valve (8) is clamped on the inner wall of the top end of the sampling pipe (3); A bracket (5) is movably mounted on the upper part of the connecting pipe (1), a motor (6) is movably mounted in the middle part of the bracket (5), and the output shaft of the motor (6) is rotatably connected to a rotating rod (61).

2. A natural gas sampling device according to claim 1, characterized in that: The sampling tube (3) has a hole in the middle and a flow valve (31) movably installed thereon, and a flow guide hole (32) is provided at the bottom of the sampling tube (3).

3. A natural gas sampling device according to claim 2, characterized in that: A rubber ring (21) is provided on the top of the air outlet pipe (2), and the rubber ring (21) fits the bottom end of the guide hole (32).

4. A natural gas sampling device according to claim 1, characterized in that: The motor (6) is a double-shaft motor, and one end of the rotating rod (61) is rotatably connected to a main gear (62).

5. A natural gas sampling device according to claim 4, characterized in that: The rotating shafts at one end of the first valve (7) and the second valve (8) are rotatably connected to the outlet pipe (2) and the sampling pipe (3) respectively, and the rotating shafts at one end of the first valve (7) and the second valve (8) are rotatably connected to a slave gear (9).

6. A natural gas sampling device according to claim 5, characterized in that: The main gear (62) and the slave gear (9) are both bevel gears, and the gear teeth of the main gear (62) and the slave gear (9) are meshed.

7. A natural gas sampling device according to claim 1, characterized in that: A protective cover (4) is sleeved on the top of the sampling tube (3).

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