Device for balancing internal air path pressure of air tritium and carbon 14 sampler
By designing a device to balance the internal gas line pressure of the air tritium and carbon 14 samplers, and using a combination of a solenoid valve and a catalytic furnace, the backflow problem caused by unbalanced pressure in the sampling pipeline was solved, and the stability and safety of the sampling process were achieved.
Patent Information
- Application Number
- CN202422553061.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-10-22
AI Technical Summary
In the prior art, the sampling pipelines of tritium and carbon 14 samplers in nuclear power plants suffer from pressure imbalance in the pipelines due to negative pressure or air extraction, which leads to backflow of the sampled liquid.
A device for balancing the internal gas circuit pressure of air tritium and carbon 14 samplers was designed. Through the control of the first three-way solenoid valve and the second three-way solenoid valve, combined with the catalytic furnace and sampling bottle, the gas circuit pressure was balanced by using an electrically connected switch mechanism to prevent back suction of the sample liquid.
It effectively prevents the backflow of the sampling liquid, improves the stability and safety of the sampling process, and ensures the balance of the gas line pressure.
Smart Images
Figure CN223413054U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of samplers, in particular to a device for balancing the internal gas path pressure of air tritium and carbon 14 samplers. Background Art
[0002] Nuclear power plant chimney ducts contain radioactive substances, such as tritium and carbon-14, which are radionuclides produced during nuclear power plant operation. These substances must be strictly monitored and managed in nuclear power plant chimney emissions to minimize their impact on the environment and public health. Therefore, nuclear power plant chimney ducts are equipped with air tritium and carbon-14 samplers to monitor the concentration of gaseous radioactive substances emitted by nuclear power plants.
[0003] In existing technology, nuclear power plants sample tritium and carbon-14 gases from gaseous effluents by drawing a sampling loop from the chimney pipe, pumping the gases through a vacuum pump into tritium and carbon-14 samplers, and then discharging them back into the chimney pipe. The radioactivity in the samples is then analyzed using a liquid scintillation counter. This sampling method can cause pressure imbalances in the sampling line due to negative chimney pressure or vacuum pump extraction, leading to backflow of the sampled liquid. Utility Model Content
[0004] The utility model proposes a device for balancing the internal gas line pressure of an air tritium and carbon 14 sampler, which is used to solve the problem in the prior art that during the sampling process, the sampling pipeline is subjected to unbalanced pipeline pressure due to negative pressure or air extraction, resulting in backflow of the sampled liquid.
[0005] The technical solution of this utility model:
[0006] The utility model proposes a device for balancing the internal gas circuit pressure of an air tritium and carbon 14 sampler. The device includes a first sampling bottle, a first three-way solenoid valve, a catalytic furnace, a second three-way solenoid valve, a second sampling bottle and a pipeline. One side of the first sampling bottle is connected to the air inlet pipeline, and the other side of the first sampling bottle is connected to the first three-way solenoid valve, the catalytic furnace, the second three-way solenoid valve and the second sampling bottle in sequence through the pipeline. The second sampling bottle is also connected to the air outlet pipeline.
[0007] In some embodiments, the device is further provided with a switch mechanism, which is electrically connected to the first three-way solenoid valve and the second three-way solenoid valve, and is used to control the opening and closing of the first three-way solenoid valve and the second three-way solenoid valve.
[0008] In some embodiments, the switching mechanism includes a connecting switch, a locking rod, a mounting plate and a mounting mechanism. The connecting switch is used to control the opening and closing of the first three-way solenoid valve and the second three-way solenoid valve. The connecting switch is provided with a switch button, and a locking hole is provided on the switch button; the mounting plate is installed on the side of the connecting switch through the mounting mechanism, the locking rod passes through the mounting plate, and the locking rod is provided in the locking hole. The locking rod matches the position and size of the locking hole, and the locking rod is used to limit the switch button of the switching mechanism to prevent accidental touching of the switch button.
[0009] In some embodiments, one end of the locking rod is inserted into the locking socket, and the other end of the locking rod is fixed to the movable plate; a guide rod is fixedly connected to the mounting plate, and the guide rod passes through the movable plate, and the guide rod guides the movement of the movable plate; a fixed limit block is provided at the end of the guide rod, and the limit block prevents the movable plate from separating from the guide rod; the locking rod can be inserted and pulled by pulling the movable plate, thereby unlocking and locking the switch button.
[0010] In some embodiments, a first spring is provided between the limit block and the movable plate, one end of the first spring is fixedly connected to the limit block, and the other end of the first spring is fixedly connected to the movable plate, and the first spring resets the movable plate.
[0011] In some embodiments, a push plate is fixedly connected to the side surface of the movable plate away from the locking rod. The cross-sectional shape of the push plate is set to be L-shaped. The push plate is set on the side surface of the movable plate. The push plate enables the staff to operate the movable plate with one hand.
[0012] In some embodiments, the mounting mechanism includes a plug-in plate, a plug-in block, and a telescopic rod. The plug-in plate is fixedly mounted on the mounting plate. A slot is provided on one side surface of the plug-in plate, and a plug-in block is provided in the slot. The plug-in block is fixedly connected to the telescopic rod, and one end of the telescopic rod is fixedly mounted inside the connecting switch. The plug-in block is used to realize the fixing and disassembly of the plug-in plate and the connecting switch.
[0013] In some embodiments, the mounting mechanism is further provided with a movable magnet, a handheld magnet and a handle. The movable magnet is fixedly connected to the plug block, and the handle is fixedly connected to the end of the handheld magnet. The handheld magnet matches the movable magnet (706), and the handheld magnet is used for disassembly of the plug block.
[0014] Beneficial effects of the utility model:
[0015] 1. The utility model proposes a device for balancing the internal gas circuit pressure of an air tritium and carbon 14 sampler. The device is energized by connecting a switch, and the first three-way solenoid valve and the second three-way solenoid valve are in the energized state, connecting the catalytic furnace with the first sampling bottle and the second sampling bottle to isolate the atmosphere. The gas enters from the first sampling bottle, passes through the catalytic furnace, and is discharged from the gas outlet end of the second sampling bottle. Then, the power is cut off to connect the first three-way solenoid valve and the second three-way solenoid valve to the atmosphere, completing the discharge of the pressure in the pipeline and preventing the sample liquid from being sucked back into the pipeline.
[0016] 2. The utility model proposes a device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler. The device realizes the insertion and removal of the locking rod and the locking socket in the switch button by pushing the push plate with one hand, thereby locking and unlocking the switch button, preventing accidental touching of the switch button, and improving the stability of operation.
[0017] 3. The utility model proposes a device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler. The device moves a handheld magnet, an insert plate and an insert block by a handle, and manipulates the insert block by the handheld magnet to achieve the fixation and removal of the insert plate, which can facilitate the installation and removal of the installation plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of a device designed for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to the present invention;
[0019] Figure 2 This is a schematic diagram of the switch mechanism of a device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to the present invention;
[0020] Figure 3 This is a schematic diagram of a mounting plate for a device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to the present invention;
[0021] Figure 4 This is a schematic diagram of the installation mechanism of a device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to the present invention;
[0022] Description of the drawings: 1. First sampling bottle; 2. Switch mechanism; 201. Connecting switch; 202. Switch button; 203. Locking socket; 204. Mounting plate; 205. Guide rod; 206. Limit block; 207. Movable plate; 208. Locking plug; 209. First spring; 210. Push plate; 3. First three-way solenoid valve; 4. Catalytic furnace; 5. Second three-way solenoid valve; 6. Second sampling bottle; 7. Mounting mechanism; 701. Plug plate; 702. Slot; 703. Hand-held magnet; 704. Handle; 705. Plug block; 706. Movable magnet; 707. Telescopic rod; 708. Second spring. DETAILED DESCRIPTION
[0023] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0024] like Figures 1 to 4 As shown, the present invention proposes a device for balancing the internal gas pressure of an air tritium and carbon-14 sampler, comprising a first sampling bottle 1, one side of which is connected to an air inlet pipeline, and the other side of which is connected to a first three-way solenoid valve 3 via a pipeline. The first three-way solenoid valve 3 is also connected to a catalytic furnace 4 via a pipeline, and the catalytic furnace 4 is also connected to a second three-way solenoid valve 5 via a pipeline. The second three-way solenoid valve 5 is also connected to a second sampling bottle 6 via a pipeline, and the second sampling bottle 6 is also connected to an outlet pipeline via a pipeline. Pipeline gas enters the first sampling bottle 1, passes through the first three-way solenoid valve 3, the catalytic furnace 4, the second three-way solenoid valve 5, and the second sampling bottle 6 in sequence, and is discharged from the device through the outlet pipeline. A switch mechanism 2 is electrically connected to the first three-way solenoid valve 3 and the second three-way solenoid valve 5, and the switch mechanism 2 is used to control the opening and closing of the first three-way solenoid valve 3 and the second three-way solenoid valve 5.
[0025] The switch mechanism 2 includes a connecting switch 201, which is used to control the opening and closing of the first three-way solenoid valve 3 and the second three-way solenoid valve 5. The connecting switch 201 is provided with a switch button 202, and the switch button 202 is provided with a locking hole 203. The number of the locking holes 203 is set to two, and the two locking holes 203 are respectively arranged at the top and bottom of one side surface of the switch button 202, so that the locking rod 208 can be inserted into the locking hole 203 to lock the switch button 202. The connecting switch 201 is provided with a mounting plate 204, and two guide rods 205 are fixedly connected to the mounting plate 204, which can guide the movement of the movable plate 207. The ends of the two guide rods 205 are fixedly connected to the limit blocks 206, which can prevent the movable plate 207 from separating from the guide rods 205. The two guide rods 205 are slidably connected to the movable plate 207. The first spring 209 is fixedly connected to the limit block 206 at one end of the first spring 209, and the other end of the first spring 209 is fixedly connected to the movable plate 207, so that the movable plate 207 can be reset. Two locking rods 208 are fixedly connected to the surface of one side of the movable plate 207. The ends of the locking rods 208 pass through the mounting plate 204 and extend to one side of the mounting plate 204, and the locking rods 208 match the locking holes 203, so that the locking rods 208 can be inserted into the locking holes 203. A push plate 210 is fixedly connected to the surface of the movable plate 207 on the side away from the two locking rods 208. The cross-sectional shape of the push plate 210 is set to be L-shaped. The push plate 210 is set on the front side surface of the movable plate 207, which can be conveniently pulled to move the push plate 210, so that the staff can operate it with one hand, thereby improving the convenience of operation.
[0026] like Figure 2 and Figure 4 As shown, a mounting mechanism 7 is provided between the mounting plate 204 and the connection switch 201. The mounting mechanism 7 includes an insert plate 701, which is fixedly mounted on the mounting plate 204. A slot 702 is defined on one side of the insert plate 701. An insert block 705 is positioned within the slot 702. A movable magnet 706 is fixedly connected to the insert block 705. A telescopic rod 707 is fixedly connected to one end of the insert block 705. The other end of the telescopic rod 707 is fixedly mounted within the connection switch 201. A second spring 708 is provided on the telescopic rod 707. The telescopic rod 707 guides the movement of the insert block 705 and the second spring 708 resets the insert block 705. When the insert plate 701 is inserted into the slot 702, the insert plate 701 is fixed to the connection switch 201. When the insert plate 701 is removed from the slot 702, the insert plate 701 can be removed from the connection switch 201. The mounting mechanism 7 further includes a handheld magnet 703 , the end of which is fixedly connected to a handle 704 , and the handheld magnet 703 matches the movable magnet 706 .
[0027] The specific method for assembling the plug plate 701 is as follows: The handheld magnet 703 is moved by the handle 704, so that the handheld magnet 703 is positioned on the side of the movable magnet 706. The handheld magnet 703 exerts an attractive force on the movable magnet 706, which drives the plug block 705 to move, separating the plug block 705 from the plug plate 701, allowing the plug plate 701 to be assembled. When the handheld magnet 703 is removed, the movable magnet 706 loses its attractive force, and the second spring 708 resets the plug block 705, which is then reinserted into the slot 702 for securement. The plug plate 701 is then secured to the connection switch 201 by the plug block 705. Therefore, the mounting mechanism 7 allows for convenient assembly and disassembly of the mounting plate 204.
[0028] The present invention provides a device for balancing the internal gas pressure of an air tritium and carbon-14 sampler. The device operates as follows: during operation, power is supplied by connecting switch 201, energizing first and second three-way solenoid valves 3 and 5, connecting a catalytic furnace 4 with a first sampling bottle 1 and a second sampling bottle 6, isolating the gas from the atmosphere. Pipeline gas enters the first sampling bottle 1, passes through the catalytic furnace 4, and is discharged from the outlet of the second sampling bottle 6, completing gas sampling. The switch mechanism 82 is then de-energized, connecting the first and second three-way solenoid valves 3 and 5 to the atmosphere, completing the release of pressure within the pipeline and preventing the sample liquid from being sucked back into the pipeline.
[0029] When using the connecting switch 201, the specific operation is that before pressing the switch button 202, the staff pulls the push plate 210 with one hand. The movement of the push plate 210 drives the movable plate 207 to move. The movement of the movable plate 207 drives the locking rod 208 to move, and the locking rod 208 is pulled out from the locking socket 203 in the switch button 202 to release the constraint on the switch button 202. After pressing the switch button 202, the push plate 210 is released, and the movable plate 207 is reset under the action of the first spring 209, and the locking rod 208 is reinserted into the locking socket 203 to prevent accidental touching of the switch button 202 and improve the stability of operation.
[0030] The embodiments of the present invention are described in detail above. The present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.
Claims
1. A device for balancing the internal gas path pressure of an air tritium or carbon 14 sampler, characterized in that: The device comprises a first sampling bottle (1), a first three-way solenoid valve (3), a catalytic furnace (4), a second three-way solenoid valve (5), a second sampling bottle (6) and a pipeline, wherein one side of the first sampling bottle (1) is connected to an air inlet pipeline, and the other side of the first sampling bottle (1) is connected to the first three-way solenoid valve (3), the catalytic furnace (4), the second three-way solenoid valve (5) and the second sampling bottle (6) in sequence through the pipeline, and the second sampling bottle (6) is also connected to an air outlet pipeline.
2. The device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to claim 1, characterized in that: The device is further provided with a switch mechanism (2), which controls the opening and closing of the first three-way solenoid valve (3) and the second three-way solenoid valve (5) by electrically connecting the first three-way solenoid valve (3) and the second three-way solenoid valve (5).
3. The device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to claim 2, characterized in that: The switch mechanism (2) comprises a connecting switch (201), a locking rod (208), a mounting plate (204) and a mounting mechanism (7); the connecting switch (201) controls the opening and closing of the first three-way solenoid valve (3) and the second three-way solenoid valve (5); the connecting switch (201) is provided with a switch button (202); a locking socket (203) is provided on the switch button (202); the mounting plate (204) is mounted on the side of the connecting switch (201) through the mounting mechanism (7); the locking rod (208) passes through the mounting plate (204); the locking rod (208) matches the locking socket (203) in position and size; the locking rod (208) is arranged in the locking socket (203); and the locking rod (208) is used to limit the switch button (202) of the switch mechanism (2).
4. The device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to claim 3, characterized in that: One end of the locking rod (208) is inserted into the locking hole (203), and the other end of the locking rod (208) is fixed on the movable plate (207); a guide rod (205) is fixedly connected to the mounting plate (204), and the guide rod (205) passes through the movable plate (207), and the guide rod (205) plays a guiding role in the movement of the movable plate (207); a fixedly connected limit block (206) is provided at the end of the guide rod (205), and the limit block (206) prevents the movable plate (207) from separating from the guide rod (205); the locking rod (208) can be pulled in and out by pulling the movable plate (207), thereby realizing the unlocking and locking of the switch button (202).
5. The device for balancing the internal gas path pressure of an air tritium and carbon 14 sampler according to claim 4, characterized in that: A first spring (209) is provided between the limit block (206) and the movable plate (207), one end of the first spring (209) is fixedly connected to the limit block (206), and the other end of the first spring (209) is fixedly connected to the movable plate (207), and the first spring (209) is used to reset the movable plate (207).
6. The device for balancing the internal gas path pressure of an air tritium or carbon 14 sampler according to claim 5, characterized in that: A push plate (210) is fixedly connected to a surface of one side of the movable plate (207) away from the locking rod (208), and the cross-sectional shape of the push plate (210) is set to be L-shaped.
7. The device for balancing the internal gas path pressure of an air tritium or carbon 14 sampler according to claim 6, characterized in that: The mounting mechanism (7) comprises an inserting plate (701), an inserting block (705) and a telescopic rod (707); the inserting plate (701) is fixedly mounted on the mounting plate (204); a slot (702) is provided on one side surface of the inserting plate (701); the inserting block (705) is provided in the slot (702); the inserting block (705) is fixedly connected to the telescopic rod (707); one end of the telescopic rod (707) is fixedly mounted inside the connection switch (201).
8. The device for balancing the internal gas path pressure of an air tritium or carbon 14 sampler according to claim 7, characterized in that: The mounting mechanism (7) is further provided with a movable magnet (706), a handheld magnet (703) and a handle (704); the movable magnet (706) is fixedly connected to the insert block (705); the end of the handheld magnet (703) is fixedly connected to the handle (704); the handheld magnet (703) matches the movable magnet (706); and the handheld magnet (703) is used for disassembling the insert block (705).