A tetrahydrothiophene content detection device

Abstract

This utility model discloses a tetrahydrothiophene content detection device, belonging to the field of tetrahydrothiophene detection technology. The device includes an inlet assembly, a cutoff assembly, a first detection assembly, and a second detection assembly. The first detection assembly includes a first detection tube, with a first tetrahydrothiophene sensor mounted on the outer wall of one end. The detection end of the first tetrahydrothiophene sensor extends through the first detection tube into its interior. The second detection assembly includes a second detection tube, with a second tetrahydrothiophene sensor mounted on the outer wall of one end. The detection end of the second tetrahydrothiophene sensor extends through the second detection tube into its interior. A mixing tube, which is a three-way valve, is connected to the end of the second detection tube furthest from the second tetrahydrothiophene. A tetrahydrothiophene inlet is located on one side of the mixing tube, a natural gas outlet is located at the end of the mixing tube closest to the second detection tube, and a natural gas inlet is located at the end of the mixing tube furthest from the second detection tube.

Description

Technical Field

[0001] This utility model relates to the field of tetrahydrothiophene detection technology, specifically a tetrahydrothiophene content detection device. Background Technology

[0002] Natural gas is an odorless gas commonly used as an important fuel resource in daily life. Because it is odorless, leaks can easily lead to fires or explosions. To enable timely detection of natural gas leaks, odorants are added. Currently, the main odorant used in China is tetrahydrothiophene, a compound that does not oxidize in air and has a strong odor. Precise control of the amount of tetrahydrothiophene added to residential gas is crucial for ensuring safe gas use; insufficient odorization leads to missed leaks, while excessive odorization causes odor pollution.

[0003] Based on the above, the inventors have discovered the following problems: most current detection devices can only detect mixed gases containing tetrahydrothiophene, which is not convenient for detecting pure natural gas and then comparing it. Natural gas itself may contain trace impurities (such as tetrahydrothiophene residue in pipelines, other volatile gases). If the mixed gas is detected directly, the impurities will be included in the tetrahydrothiophene concentration, resulting in errors and falsely high detection values.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a tetrahydrothiophene content detection device in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this invention is to provide a tetrahydrothiophene content detection device to solve the problems mentioned in the background art.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows: A tetrahydrothiophene content detection device includes an inlet assembly, a cutoff assembly, a first detection assembly, and a second detection assembly. The first detection assembly includes a first detection tube, and a first tetrahydrothiophene sensor is installed on the outer wall of one end of the first detection tube. The detection end of the first tetrahydrothiophene sensor extends through the first detection tube into the interior. The second detection assembly includes a second detection tube, and a second tetrahydrothiophene sensor is installed on the outer wall of one end of the second detection tube. The detection end of the second tetrahydrothiophene sensor extends through the second detection tube into the interior. The second detection tube is connected to a mixing tube at the end away from the second tetrahydrothiophene. The mixing tube is a three-way pipe. A tetrahydrothiophene inlet is provided on one side of the mixing tube. A natural gas outlet is provided at the end of the mixing tube near the second detection tube, and a natural gas inlet is provided at the end of the mixing tube away from the second detection tube.

[0007] Furthermore, a perforated plate is installed inside the mixing pipe near the natural gas inlet, and the perforated plate has several microporous gas channels. A one-way valve is installed inside the mixing pipe near the tetrahydrothiophene inlet, and a metering pump is installed on the outer wall of the mixing pipe near the tetrahydrothiophene inlet. The outlet of the metering pump is connected to the inlet of the one-way valve, and the inlet of the metering pump is connected to the exhaust valve of the tetrahydrothiophene storage tank.

[0008] The beneficial effect of adopting the above-mentioned further scheme is that the microporous gas channels of the perforated plate can divide the natural gas gas flow entering the mixing tube into small streams, increasing the contact area with tetrahydrothiophene; the metering pump can accurately control the injection volume of tetrahydrothiophene, and with the help of the one-way valve (to prevent natural gas from flowing back into the metering pump), it ensures that tetrahydrothiophene enters the mixing tube in a one-way quantitative manner and is fully mixed with the natural gas that has been divided into small streams.

[0009] Furthermore, flow meters are installed at both the end of the mixing tube furthest from the second detection tube and the end of the first detection tube furthest from the first tetrahydrothiophene sensor.

[0010] The beneficial effect of adopting the above-mentioned further scheme is that the flow meter can monitor the gas flow velocity and flow rate in real time, providing a flow reference for the detection process. On the first detection tube side (pure natural gas detection without tetrahydrothiophene) and the mixing tube side (mixed gas detection with tetrahydrothiophene), the flow meter can detect the flow rate of natural gas injected into the first detection tube and subsequently entering the second detection tube, ensuring that the natural gas in the first detection tube and the second detection tube are the same quantity.

[0011] Furthermore, there are two cut-off components, each installed at one end of one of the two flow meters. Each cut-off component includes a connecting seat, the interior of which is provided with a spherical groove. A spherical seat is rotatably connected inside the spherical groove. A retaining sleeve is installed on the inner top surface of the spherical seat. A square groove is opened at the bottom end of the retaining sleeve. A valve block is slidably connected inside the square groove. A spring is installed between the top surface of the valve block and the inner top surface of the retaining sleeve. A servo motor is installed on the top surface of the connecting seat. The output end of the servo motor passes through the connecting seat and is fixedly connected to the spherical seat.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the cooperation of the valve block and the spring allows the valve block to be opened under certain pressure when natural gas enters the spherical seat, causing the spring to be compressed and the natural gas to flow only in one direction. The servo motor can drive the spherical seat to rotate in the spherical groove to achieve rapid cut-off or conduction switching. When the flow channel of the spherical seat is aligned with the inlet and outlet of the connecting seat, the airflow passes smoothly. When the natural gas flow rate in the first or second detection tube reaches the standard, the rotating flow channel of the spherical seat is misaligned with the inlet and outlet of the connecting seat to achieve rapid cut-off and prevent the continued delivery of natural gas into the first or second detection tube.

[0013] Furthermore, one end of one of the connecting seats is fixedly connected to the end of one of the flow meters away from the first detection tube, and one end of the other connecting seat is fixedly connected to the end of another flow meter away from the mixing tube.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by connecting the two cut-off components to the two flow meters one by one, independent control of the circuit can be achieved. When detecting pure natural gas, the cutting-off component on the mixing pipe side is closed and the cutting-off component on the first detection pipe side is turned on to ensure that the gas flow only flows through the first detection pipe. When detecting mixed gas, the cutting-off component on the first detection pipe side is closed and the cutting-off component on the mixing pipe side is turned on to prevent the mixed gas from contaminating the pure natural gas detection circuit.

[0015] Furthermore, the end of the connecting seat closest to the flow meter is the outlet, and a flow channel is provided inside the spherical seat.

[0016] The beneficial effects of adopting the above-mentioned further solution are that the outlet of the connecting seat is connected to the flow meter, ensuring that the airflow directly enters the flow meter after flowing out of the connecting seat, thus ensuring the accuracy of the flow meter detection data; the flow channel inside the spherical seat matches the inlet and outlet of the connecting seat, which can realize the flow of natural gas.

[0017] Furthermore, the air intake assembly includes a main pipe, with a first branch pipe and a second branch pipe connected to the outer side of the main pipe. The first branch pipe and the second branch pipe are respectively fixedly connected to two connecting seats at the ends away from the main pipe. A pump is installed on the outer wall of one end of the main pipe. The air outlet end of the pump passes through the main pipe. The inner wall of the air inlet end of the pump is provided with internal threads. The air inlet end of the pump is connected to the exhaust valve of the natural gas storage tank through a pipe.

[0018] The beneficial effects of adopting the above-mentioned further scheme are that the use of the main pipe in conjunction with the first and second branch pipes can divide the gas flow of the natural gas storage tank into two paths (pure natural gas path and mixed natural gas path); the pump can provide a stable inlet pressure, and the internal thread design of the pump inlet end facilitates the sealing connection between the pipeline and the exhaust valve of the natural gas storage tank. When the exhaust valve is opened and the pump is started, it is convenient to pump the natural gas in the natural gas storage tank into the main pipe and then discharge it through the first and second branch pipes.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: When the exhaust valve is opened and the pump is started, natural gas from the natural gas storage tank is pumped into the main pipe and then discharged through the first and second branch pipes. When detecting the tetrahydrothiophene content in pure natural gas, the mixing pipe side cutoff assembly is closed, and the first detection pipe side cutoff assembly is opened, ensuring that the gas flow only passes through the first detection pipe. The first tetrahydrothiophene sensor is used to detect the original tetrahydrothiophene content in the natural gas. When detecting mixed gas, the first detection pipe side cutoff assembly is closed, and the mixing pipe side cutoff assembly is opened, preventing contamination of the mixed gas. The pure natural gas detection loop uses a metering pump to precisely control the injection volume of tetrahydrothiophene. Combined with a one-way valve, this ensures that tetrahydrothiophene enters the mixing tube in a unidirectional, quantitative manner, fully mixing with the natural gas that has been divided into fine streams. After adding a sample to the natural gas, a second tetrahydrothiophene sensor detects the tetrahydrothiophene content within the natural gas and then compares the results. The flow meter settings ensure that the natural gas in both the first and second detection tubes is injected in the same quantitative manner. By testing the natural gas before and after tetrahydrothiophene injection and comparing the two results, the true tetrahydrothiophene content in the natural gas is calculated. Attached Figure Description

[0020] Figure 1 A three-dimensional structural diagram of a tetrahydrothiophene content detection device provided by this utility model; Figure 2 A three-dimensional structural schematic diagram of the air intake component of a tetrahydrothiophene content detection device provided by this utility model; Figure 3 An exploded three-dimensional structural diagram of the first and second detection components of a tetrahydrothiophene content detection device provided by this utility model; Figure 4 A top cross-sectional view of the mixing tube of a tetrahydrothiophene content detection device provided by this utility model; Figure 5 This is a side cross-sectional view of the cut-off component of a tetrahydrothiophene content detection device provided by this utility model.

[0021] In the diagram: 1. Intake assembly; 11. Main pipe; 12. First branch pipe; 13. Second branch pipe; 14. Pump; 2. Cut-off assembly; 21. Connecting seat; 22. Ball seat; 23. Retaining sleeve; 24. Valve block; 25. Spring; 26. Servo motor; 3. First detection assembly; 31. First detection tube; 32. First tetrahydrothiophene sensor; 4. Second detection assembly; 41. Second detection tube; 42. Second tetrahydrothiophene sensor; 43. Mixing tube; 44. Perforated plate; 45. Check valve; 46. Metering pump; 5. Flow meter. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-5 This utility model provides a technical solution: a tetrahydrothiophene content detection device, comprising an air inlet assembly 1, a cutoff assembly 2, a first detection assembly 3, and a second detection assembly 4. The first detection assembly 3 includes a first detection tube 31, and a first tetrahydrothiophene sensor 32 is installed on the outer wall of one end of the first detection tube 31, with the detection end of the first tetrahydrothiophene sensor 32 extending through the first detection tube 31 into its interior. The second detection assembly 4 includes a second detection tube 41, and a second tetrahydrothiophene sensor 42 is installed on the outer wall of one end of the second detection tube 41, with the detection end of the second tetrahydrothiophene sensor 42 extending through the second detection tube. 41 extends internally. The second detection tube 41 is connected to a mixing tube 43 at the end furthest from the second tetrahydrothiophene. The mixing tube 43 is a three-way pipe. A tetrahydrothiophene inlet is located on one side of the mixing tube 43. A natural gas outlet is located at the end of the mixing tube 43 closest to the second detection tube 41, and a natural gas inlet is located at the end of the mixing tube 43 furthest from the second detection tube 41. A perforated plate 44 is installed inside the mixing tube 43 near the natural gas inlet. The perforated plate 44 has several microporous gas channels. A one-way valve 45 is installed inside the mixing tube 43 near the tetrahydrothiophene inlet. A one-way valve 45 is installed outside the mixing tube 43 near the tetrahydrothiophene inlet. A metering pump 46 is installed on the wall. The outlet of the metering pump 46 is connected to the inlet of the one-way valve 45, and the inlet of the metering pump 46 is connected to the exhaust valve of the tetrahydrothiophene storage tank. When the exhaust valve is opened and the pump 14 is started, the natural gas in the natural gas storage tank is pumped into the main pipe 11 and then discharged through the first branch pipe 12 and the second branch pipe 13. When detecting the tetrahydrothiophene content in pure natural gas, the shut-off assembly 2 on the mixing pipe 43 side is closed, and the shut-off assembly 2 on the first detection pipe 31 side is opened to ensure that the gas flow only flows through the first detection pipe 31. The original tetrahydrothiophene content in the natural gas is detected by the first tetrahydrothiophene sensor 32. The mixed gas is then detected. When the gas is being processed, the first detection tube 31 side cutoff component 2 is closed, and the mixing tube 43 side cutoff component 2 is opened to prevent the mixed gas from contaminating the pure natural gas detection circuit. The metering pump 46 is started to precisely control the injection volume of tetrahydrothiophene. With the cooperation of the one-way valve 45, it is ensured that tetrahydrothiophene enters the mixing tube 43 in a one-way quantitative manner and is fully mixed with the natural gas that has been divided into small streams. After the sample is added to the natural gas, the tetrahydrothiophene content inside the natural gas after the sample is added is detected by the second tetrahydrothiophene sensor 42 and then compared. The flow meter 5 is set to ensure that the natural gas in the first detection tube 31 and the second detection tube 41 are the same quantitatively.

[0024] 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.

[0025] Please see Figures 1-5 This utility model provides a technical solution: Flow meters 5 are installed at the end of the mixing tube 43 away from the second detection tube 41 and at the end of the first detection tube 31 away from the first tetrahydrothiophene sensor 32. Two cut-off components 2 are installed, each at one end of a flow meter 5. Each cut-off component 2 includes a connecting seat 21. The connecting seat 21 has a spherical groove inside, and a spherical seat 22 is rotatably connected inside the spherical groove. A retaining sleeve 23 is installed on the top surface of the spherical seat 22. A square groove is opened at the bottom end of the retaining sleeve 23, and a valve block 24 is slidably connected inside the square groove. A spring 25 is installed between the top surface of the valve block 24 and the top surface of the retaining sleeve 23. A servo motor 26 is installed on the top surface of the connecting seat 21. The output end of the servo motor 26 passes through the connecting seat 21 and is fixedly connected to the spherical seat 22. One end of one of the connecting seats 21 is connected to one of the spherical seats 22. One flow meter 5 is fixedly connected to the end away from the first detection tube 31, and one end of another connecting seat 21 is fixedly connected to the end of another flow meter 5 away from the mixing tube 43. The end of the connecting seat 21 near the flow meter 5 is the outlet. A flow channel is provided inside the spherical seat 22. The valve block 24 and the spring 25 work together. When natural gas enters the spherical seat 22, it will push open the valve block 24 under a certain pressure, so that the spring 25 is compressed and the natural gas can only flow in one direction. The servo motor 26 can drive the spherical seat 22 to rotate in the spherical groove to realize rapid cut-off or conduction switching. When the flow channel of the spherical seat 22 is aligned with the inlet and outlet of the connecting seat 21, the airflow passes smoothly. When the natural gas flow in the first detection tube 31 or the second detection tube 41 reaches the standard, the rotating flow channel of the spherical seat 22 is misaligned with the inlet and outlet of the connecting seat 21 to realize rapid cut-off and prevent the continued delivery of natural gas into the first detection tube 31 or the second detection tube 41.

[0026] 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.

[0027] Please see Figures 1-5This utility model provides a technical solution: the air intake assembly 1 includes a main pipe 11, and a first branch pipe 12 and a second branch pipe 13 are connected to the outer side of the main pipe 11. The first branch pipe 12 and the second branch pipe 13 are respectively fixedly connected to two connecting seats 21 at the ends away from the main pipe 11. A pump 14 is installed on the outer wall of one end of the main pipe 11. The outlet end of the pump 14 passes through the main pipe 11. The inner wall of the inlet end of the pump 14 is provided with an internal thread. The inlet end of the pump 14 is connected to the exhaust valve of the natural gas storage tank through a pipe. The cooperation of the main pipe 11 with the first branch pipe 12 and the second branch pipe 13 can divide the airflow of the natural gas storage tank into two paths: a pure natural gas path and a mixed natural gas path. The pump 14 can provide a stable air intake pressure. The internal thread design of the inlet end of the pump 14 facilitates the sealing connection with the exhaust valve of the natural gas storage tank through a pipe. When the exhaust valve is opened and the pump 14 is started, the natural gas in the natural gas storage tank is easily pumped into the main pipe 11 and then discharged through the first branch pipe 12 and the second branch pipe 13.

[0028] Specifically, the working principle of this tetrahydrothiophene content detection device is as follows: During use, the tetrahydrothiophene injection volume of the metering pump 46 is set according to the detection requirements; the pump 14 is started, and pure natural gas without added tetrahydrothiophene is introduced from the natural gas storage tank through the main pipe 11. The internal threaded sealing connection at the air inlet of the pump 14 ensures no air is mixed in; the servo motor 26 of the cut-off component 2 corresponding to the first branch pipe 12 drives the spherical seat 22 to rotate, aligning the flow channel with the inlet and outlet of the connecting seat 21. The valve block 24 compresses the spring 25 under airflow pressure, allowing smooth airflow. The cut-off component 2 corresponding to the second branch pipe 13 is closed. At this time, pure natural gas enters the first detection pipe 31 through the first branch pipe 12, the cut-off component 2, and the flow meter 5. The first tetrahydrothiophene sensor 32 detects the baseline value of tetrahydrothiophene in the pure natural gas; the cut-off component 2 corresponding to the first branch pipe 12 is closed, and the cut-off component 2 corresponding to the second branch pipe 13 is opened. Part 2: Pure natural gas enters the natural gas inlet of the mixing pipe 43 via the second branch pipe 13, the cut-off component 2, and the flow meter 5. The perforated plate 44 divides the natural gas into fine streams. At the same time, the metering pump 46 starts, injecting tetrahydrothiophene from the tetrahydrothiophene storage tank into the tetrahydrothiophene inlet of the mixing pipe 43 according to the set amount. The one-way valve 45 prevents natural gas from flowing back into the metering pump 46. The tetrahydrothiophene and natural gas are fully mixed in the mixing pipe 43. The mixed gas enters the second detection pipe 41 through the natural gas outlet. The second tetrahydrothiophene sensor 42 detects the actual concentration and then compares it. The flow meter 5 ensures that the natural gas in the first detection pipe 31 and the second detection pipe 41 are the same quantity. One end of the main pipe 11 of the first detection pipe 31 and the second detection pipe 41 is connected to the first output pipe and the second output pipe, respectively. The first output pipe and the second output pipe can be connected to the recovery storage tank.

[0029] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. Furthermore, since this application is mainly used to protect mechanical devices, the control methods and circuit connections will not be explained in detail in this application.

Claims

1. A tetrahydrothiophene content detection device, characterized in that, The system includes an intake assembly (1), a cut-off assembly (2), a first detection assembly (3), and a second detection assembly (4). The first detection assembly (3) includes a first detection tube (31), and a first tetrahydrothiophene sensor (32) is installed on the outer wall of one end of the first detection tube (31). The detection end of the first tetrahydrothiophene sensor (32) extends through the first detection tube (31) into the interior. The second detection assembly (4) includes a second detection tube (41), and a second tetrahydrothiophene sensor is installed on the outer wall of one end of the second detection tube (41). The sensor (42) has its detection end extending through the second detection tube (41) into the interior. The second detection tube (41) is connected to a mixing tube (43) at the end away from the second tetrahydrothiophene. The mixing tube (43) is a three-way tube. A tetrahydrothiophene inlet is provided on one side of the mixing tube (43). A natural gas outlet is provided at the end of the mixing tube (43) near the second detection tube (41). A natural gas inlet is provided at the end of the mixing tube (43) away from the second detection tube (41).

2. The tetrahydrothiophene content detection device according to claim 1, characterized in that, The mixing pipe (43) has a perforated plate (44) installed inside near the natural gas inlet. The perforated plate (44) has several microporous gas channels. The mixing pipe (43) has a one-way valve (45) installed inside near the tetrahydrothiophene inlet. The mixing pipe (43) has a metering pump (46) installed on the outer wall near the tetrahydrothiophene inlet. The outlet of the metering pump (46) is connected to the inlet of the one-way valve (45). The inlet of the metering pump (46) is connected to the exhaust valve of the tetrahydrothiophene storage tank.

3. The tetrahydrothiophene content detection device according to claim 2, characterized in that, Flow meters (5) are installed at the end of the mixing tube (43) away from the second detection tube (41) and at the end of the first detection tube (31) away from the first tetrahydrothiophene sensor (32).

4. The tetrahydrothiophene content detection device according to claim 1, characterized in that, The number of the cut-off components (2) is two. The two cut-off components (2) are respectively installed at one end of the two flow meters (5). Both cut-off components (2) include a connecting seat (21). The connecting seat (21) has a spherical groove inside. A spherical seat (22) is rotatably connected inside the spherical groove. A retaining sleeve (23) is installed on the inner top surface of the spherical seat (22). A square groove is opened at the bottom end of the retaining sleeve (23). A valve block (24) is slidably connected inside the square groove. A spring (25) is installed between the top surface of the valve block (24) and the inner top surface of the retaining sleeve (23). A servo motor (26) is installed on the top surface of the connecting seat (21). The output end of the servo motor (26) passes through the connecting seat (21). The output end of the servo motor (26) is fixedly connected to the spherical seat (22).

5. The tetrahydrothiophene content detection device according to claim 4, characterized in that, One end of one of the connecting seats (21) is fixedly connected to one end of one of the flow meters (5) away from the first detection tube (31), and one end of the other connecting seat (21) is fixedly connected to one end of another flow meter (5) away from the mixing tube (43).

6. The tetrahydrothiophene content detection device according to claim 5, characterized in that, The end of the connecting seat (21) near the flow meter (5) is the outlet, and the spherical seat (22) is provided with a flow channel.

7. The tetrahydrothiophene content detection device according to claim 1, characterized in that, The air intake assembly (1) includes a main pipe (11), and a first branch pipe (12) and a second branch pipe (13) are connected to the outer side of the main pipe (11). The first branch pipe (12) and the second branch pipe (13) are fixedly connected to two connecting seats (21) at the ends away from the main pipe (11). A pump (14) is installed on the outer wall of one end of the main pipe (11). The outlet end of the pump (14) passes through the main pipe (11). The inner wall of the inlet end of the pump (14) is provided with an internal thread. The inlet end of the pump (14) is connected to the exhaust valve of the natural gas storage tank through a pipe.

Images