Isolation device

Abstract

The present invention relates to an isolation device, comprising a valve body, a valve seat and an isolation structure; the valve body includes a first chamber and a second chamber; the second chamber is connected to an external pressure measuring instrument; the first chamber is connected to a valve that needs to be pressure-measured; the valve seat is arranged between the first chamber and the second chamber; the isolation structure is movably arranged in the first chamber in the direction towards the valve seat, so as to move towards the valve seat under the push of the radioactive medium when the radioactive medium enters the first chamber and seal with the valve seat, isolating the media in the first chamber and the second chamber. By arranging an isolation structure that can move in the direction towards the valve seat in the first chamber, this isolation device can isolate the media in the first chamber and the second chamber, prevent the radioactive medium from diffusing from the second chamber, thereby improving the safety of the pressure measuring instrument test, and avoiding the pressure measuring instrument from being contaminated and discarded, which can reduce the use cost of the pressure measuring instrument.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power, and more specifically, to an isolation device. Background Art

[0002] When performing a differential pressure test on a pressure measuring instrument in a nuclear power plant, it is required to directly connect the pressure measuring instrument (such as a pressure transmitter) to the upstream pipe section of a valve (such as a SEBIM safety valve) (at RCV402VP). Then, the personnel in the main control room issue a pressure boost command, and after the valve acts, a pressure relief command is issued. At this time, the valve opening value and the reseating value pressure information can be read at the pressure measuring instrument, and the test is completed by comparing the drainage volume.

[0003] During this test process, radioactive liquid in the system will enter the pressure measuring instrument through the connecting pipeline, causing contamination of the pressure measuring instrument. And there is no mature calibration method for the contaminated pressure measuring instrument. Therefore, it can only be scrapped after its calibration fails.

[0004] On the one hand, it causes a large amount of waste of pressure measuring instruments; on the other hand, it forms a large amount of radioactive solid waste, increasing the treatment cost. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an improved isolation device.

[0006] The technical solution adopted by the present invention to solve its technical problems is: constructing an isolation device, including a valve body, a valve seat, and an isolation structure;

[0007] The valve body includes a first chamber and a second chamber; the second chamber is connected to an external pressure measuring instrument; the first chamber is connected to a valve to be pressure-measured;

[0008] The valve seat is arranged between the first chamber and the second chamber;

[0009] The isolation structure is movably arranged in the first chamber in the direction of the valve seat, so as to move towards the valve seat under the push of the radioactive medium when the radioactive medium enters the first chamber and seal with the valve seat, isolating the media in the first chamber and the second chamber.

[0010] In some embodiments, the isolation structure includes an isolation part; the isolation part deforms under the push of the radioactive medium and fits with the valve seat.

[0011] In some embodiments, the cross-sectional shape of the isolation part is adapted to the first chamber, and the cross-sectional size of the isolation part is adapted to the cross-sectional size of the first chamber.

[0012] In some embodiments, the valve seat is a through structure at both ends;

[0013] The isolation device includes a plug core, one end of the plug core is connected to the isolation part, and the other end drives through the deformation of the isolation part to penetrate into the valve seat and seal with the valve seat.

[0014] In some embodiments, the isolation device further includes an indicating structure, which is connected to the end of the plug core away from the isolation part for indicating the position of the isolation part.

[0015] In some embodiments, the indicating structure includes an indicating rod, a first magnetic member, and a second magnetic member;

[0016] The indicating rod is connected to the plug core, the first magnetic member is arranged at the end of the indicating rod away from the plug core, the second magnetic member is arranged on the valve body, cooperates with the first magnetic member, and is exposed outside the valve body for the operator to observe.

[0017] In some embodiments, the isolation structure is a thin film structure.

[0018] In some embodiments, the valve body includes a second valve body and a first valve body assembled with the second valve body;

[0019] The first chamber is formed in the first valve body, and the second chamber is formed in the second valve body;

[0020] An opening communicating with the first chamber is provided on the first valve body;

[0021] The second valve body includes a covering portion covering the opening; an installation hole is provided at the central axis of the covering portion; the valve seat is installed at the installation hole and extends toward the second chamber;

[0022] A sealing structure is provided between the valve seat and the installation hole.

[0023] In some embodiments, the isolation structure includes an isolation part and a connecting part arranged on the outer periphery of the isolation part.

[0024] In some embodiments, a water injection hole is provided on the valve body, and the water injection hole communicates with the first chamber;

[0025] A communication hole is provided on the valve body, the communication hole communicates with the first chamber, and a check valve is provided at the communication hole to prevent the medium in the second chamber from flowing into the first chamber;

[0026] And / or, a first exhaust hole is provided on the valve body, and the first exhaust hole communicates with the first chamber;

[0027] And / or, a second exhaust hole is provided on the valve body, and the second exhaust hole communicates with the first chamber;

[0028] And / or, a pressure tapping hole is provided on the valve body, and the pressure tapping hole communicates with the second chamber.

[0029] Implementing the isolation device of the present invention has the following beneficial effects: The isolation device is provided with an isolation structure that can move towards the valve seat in the first chamber. Thus, when radioactive medium enters the first chamber, it can move towards the valve seat under the push of the radioactive medium and fit with the valve seat, isolating the media in the first chamber and the second chamber, preventing the radioactive medium from diffusing from the second chamber, thereby improving the safety of the pressure gauge test, and preventing the pressure gauge from being contaminated and discarded, which can reduce the usage cost of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0031] Figure 1 is a schematic structural diagram of the isolation device in some embodiments of the present invention;

[0032] Figure 2 is Figure 1 a cross-sectional view of the isolation device shown;

[0033] Figure 3 is Figure 1 a schematic exploded view of the isolation device shown;

[0034] Figure 4 is Figure 3 a schematic structural diagram of the first valve body of the isolation device shown;

[0035] Figure 5 is Figure 3 a schematic structural diagram of the second valve body of the isolation device shown;

[0036] Figure 6 is Figure 3 a schematic structural diagram of the isolation component of the isolation device shown;

[0037] Figure 7 is Figure 6 a schematic structural diagram of the isolation structure of the isolation component shown;

[0038] Figure 8 is Figure 1 a schematic diagram of the state when the isolation device is in use;

[0039] Figure 9 is Figure 1 a pressure change curve graph of the pressure transmitter when the isolation device is performing a differential pressure test;

[0040] Figure 10 Yes Figure 1 The pressure change curve of the pressure transmitter during the loss-of-pressure tightness test of the isolation device shown Specific embodiments

[0041] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings

[0042] Figure 1 Some preferred embodiments of the isolation device 100 of the present invention are shown. The isolation device 100 can be used for the differential pressure test of nuclear power plants. The isolation device 100 can be connected between a pressure measuring instrument and a valve that needs to be pressure measured. Specifically, the isolation device 100 can be connected to a differential pressure transmitter and a SEBIM safety valve. The SEBIM safety valve is placed in a system filled with radioactive medium. The isolation device 100 can be specifically connected between the pressure transmitter and the pressure tapping point of the online test safety valve opening value system. The isolation device 100 can be used to isolate radioactive medium, prevent radioactive medium from entering the pressure measuring instrument, that is, prevent radioactive medium from entering the pressure transmitter, and prevent radioactive medium from contaminating the pressure transmitter. It can be understood that in some other embodiments, the isolation device 100 may not be limited to isolating radioactive medium from entering the differential pressure transmitter. In some embodiments, the radioactive medium is a high-pressure radioactive medium. In some embodiments, the isolation device 100 can be used to completely isolate radioactive medium from non-radioactive medium, prevent radioactive medium from leaking; and can make the measured pressure difference as small as possible or tend to a definite value. In addition, when a sudden loss-of-pressure condition occurs at the pressure measuring position, the isolation device 100 can properly seal the radioactive medium

[0043] As Figure 1 And Figure 2 As shown, in some embodiments, the isolation device 100 includes a valve body 10, a valve seat 20, and an isolation component 40. The valve body 10 can be used for installing the valve seat 20 and the isolation component 40. The valve seat 20 is arranged in the valve body 10. The isolation component 40 is arranged in the valve body 10 for isolating radioactive medium

[0044] As Figures 1 to 3 As shown, further, in some embodiments, the valve body 10 includes a first valve body 11, a second valve body 12, and a valve cover 13. The first valve body 11 can be detachably assembled with the second valve body 12. The valve cover 13 is detachably installed on the second valve body 12

[0045] As Figure 4As shown, specifically, the first valve body 11 includes a body 111. The cross-section of the body 111 can be generally circular and is a hollow structure with an opening 1120 at one end. A first chamber 112 is formed inside, and the first chamber 112 is connected to the opening 1120. The first chamber 112 can be a pollution chamber, which can be connected to the valve whose pressure needs to be measured. A first installation groove 113 can be provided on the end face of the first chamber 112. The first installation groove 113 can be annular for installing the isolation structure 41 of the isolation assembly 40. A second installation groove 114 is provided on the outer periphery of the first installation groove 113, and the second installation groove 114 can be used for installing the first seal 15. In some embodiments, the second installation groove 114 is generally annular. In some embodiments, a first exhaust hole 115 is provided on the valve body 10. The first exhaust hole 115 can be provided on the first valve body 11. Specifically, it can be provided on the bottom wall of the first chamber 112 and is preferably provided near the edge. The first exhaust hole 115 can be used to discharge the air in the first chamber 112. In some embodiments, a water injection hole 116 is provided on the valve body 10. The water injection hole 116 is provided on the bottom wall of the first chamber 112 and is communicated with the first chamber 112. The water injection hole 116 can be connected to a water injection pipeline. In some embodiments, after the water injection is completed, the first exhaust hole 115 can be connected to the valve whose pressure needs to be measured.

[0046] As Figure 5As shown, in some embodiments, the second valve body 12 includes a covering portion 121 and a cylinder 122 disposed on the covering portion 121. The cross-sectional shape and size of the covering portion 121 can be adapted to the cross-sectional shape and size of the main body 11. The covering portion 121 can cover the opening 1120 and can be hermetically connected to the opening 1120 through a first seal 15. The covering portion 121 and the main body 111 can be connected by providing a first screw 14. In some embodiments, an installation hole 1211 can be provided on the covering portion 121. The installation hole 1211 can be located at the central axis of the covering portion 121 and can communicate with the first chamber 112. The installation hole 1211 can be used for installing the valve seat 20. In some embodiments, the cylinder 122 can be disposed on a side of the covering portion 121 opposite to the opening 1120. The cylinder 122 is a hollow structure, and an assembly port for cooperating with the valve cover 13 is provided at one end. A second chamber 123 is formed inside the cylinder 122. The second chamber 123 can be connected to an external pressure measuring instrument and can access a non-radioactive medium. Specifically, the second chamber 123 can form a clean water chamber. Specifically, in some embodiments, the second chamber 123 can be connected to a pressure transmitter. In some embodiments, a pressure tapping hole 1221 is provided on the side wall of the cylinder 122. The pressure tapping hole 1221 communicates with the second chamber 123. The pressure tapping hole 1221 can be connected to the pressure measuring instrument through a connection joint assembly. In some embodiments, the joint assembly can select a conventional banjo joint. The use of the banjo joint can make the sealing of the second chamber 123 better and the pressure resistance effect better. It can withstand a high pressure of 300 bar. In some embodiments, a communication hole 124 is provided on the valve body 10. The communication hole 124 can communicate with the first chamber 112 and can communicate with a space on a side of the isolation structure 41 in the second chamber 123 away from the valve to be pressure measured. A check valve is provided at the communication hole 124. The communication hole 124 allows the medium in the first chamber 112 to flow into the second chamber 123 and can prevent the medium in the second chamber 123 from flowing into the first chamber 112. In some embodiments, a second exhaust hole 125 is provided on the valve body 10. The second exhaust hole 125 can be provided on the covering portion 121 and can communicate with the first chamber 112 for discharging the pressure in the first chamber 112.

[0047] For another example Figure 3As shown, in some embodiments, the valve cover 13 may include a cover body 131 and positioning posts 132. The cover body 131 may cover the second chamber 123, and its cross-sectional shape and dimensions may be adapted to the cross-sectional shape and dimensions of the cylinder body 122. In some embodiments, the positioning posts 132 are provided on the cover body 131 and protrude toward a side of the cover body 131 opposite to the second chamber 123. The positioning posts 132 are located at the central axis of the cover body 131. The positioning posts 132 can be used for mounting and positioning the indicating structure 60. A guiding groove 1321 may be provided on the positioning posts 132, and the guiding groove 1321 can cooperate with the indicating structure 60 and guide the movement of the second magnetic member 63 of the indicating structure 60. In some embodiments, the valve cover 13 can be fixedly connected to the cylinder body 122 by providing second screws 16.

[0048] In some embodiments, the first valve body 11 and the second valve body 12 are hermetically connected by providing a first seal 15. In some embodiments, the first seal can be a sealing ring. Specifically, it can be a silica gel ring or a rubber ring. The first seal can be installed in the second installation groove 114. By providing the first seal 15 and the isolation structure 40, two sealing barriers can be established to prevent the diffusion of radioactive media.

[0049] In some embodiments, the valve seat 20 may be generally conical, and its conical portion may protrude toward the second chamber 123. The bottom surface of the valve seat 20 may be flush with the bottom surface of the covering portion 121. The valve seat 20 is a hollow structure with both ends penetrating, and its maximum dimension may be equivalent to the aperture of the installation hole 1211.

[0050] In some embodiments, the valve seat 20 and the installation hole 1211 may be hermetically connected by providing a sealing structure 30. In some embodiments, the sealing structure 30 can be a sealing ring, which can be sleeved on the valve seat 20. Specifically, the sealing structure 30 can be a silica gel ring or a rubber ring. By providing the sealing structure 30 on the valve seat 20, it is convenient to achieve enhanced sealing between the valve seat 20 and the installation hole 1211 under a pressurized state.

[0051] As Figures 6 to 7As shown, in some embodiments, the isolation component 40 may include an isolation structure 41 and a plug core 42. The isolation structure 41 is disposed in the first chamber 112 and is movably arranged toward the valve seat 20. During the test, when the radioactive medium enters the first chamber 112, the radioactive medium can push the isolation structure 41 to move it toward the valve seat 20 and fit and seal with the valve seat 20, thereby preventing the radioactive medium from entering the second chamber 123 from the valve seat 20 and avoiding the diffusion of the radioactive medium toward the second chamber 123, and further playing a role in isolating the media in the first chamber 112 and the second chamber 123. One end of the plug core 42 can be connected to the isolation structure 41. When a break accident occurs, under the push of the radioactive medium, the isolation part of the isolation structure 41 can deform, and then can push the end of the plug core 42 away from the isolation structure 41 to penetrate into the valve seat 20. The plug core 42 can be movably arranged along the axial direction of the valve seat 20 and is in sealed connection with the valve seat 20.

[0052] In some embodiments, the isolation structure 41 adopts a physical isolation method with relatively high reliability. The isolation structure 41 is an elastic structure. The isolation structure 41 can be integrally sheet-shaped. Specifically, it can be a thin film structure. The isolation structure 41 includes an isolation part 411 and a connecting part 412. The isolation part 411 can deform under the push of the radioactive medium, and then can move toward the valve seat 20 and fit with the valve seat 20. In some embodiments, the cross-sectional shape of the isolation part 411 can be adapted to the first chamber 112. Specifically, the isolation part 411 can be recessed in a direction away from the valve seat 20, and its contour is generally circular. The cross-sectional size of the isolation part 411 can be adapted to the cross-sectional size of the first chamber 112, and then can be in sealed connection with the first chamber 112. The connecting part 412 is disposed on the outer periphery of the isolation part 411 and is arranged along the circumferential direction of the isolation part 411. The connecting part 412 can be integrally formed with the isolation part 411. The connecting part 412 is connected to the first valve body 11 by setting a connecting structure 50.

[0053] It can be understood that in some other embodiments, the isolation structure 41 is not limited to being a thin film structure. In some other embodiments, the isolation structure 41 can be a piston, a bellows blocked at one end, or a diaphragm. The reason for choosing the thin film is that the diaphragm is easy to deform, which easily causes pressure transmission loss, and the piston and bellows components reduce the pressure conduction sensitivity. However, when the thin film is filled with an incompressible medium (such as water) before and after it, it can produce a large amount of deformation. And the application of the thin film can achieve the goal of minimizing the pressure measurement deviation value and having sufficient sensitivity. It can quickly seal the high-pressure radioactive medium in time when a break occurs on the pressure measurement side. Through a large amount of deformation, the plug core 42 and the valve seat 20 form a sealed chamber to complete the restraint of the high-pressure radioactive medium.

[0054] In some embodiments, a connecting through hole 4111 is provided at the central axis of the isolation part 411. The connecting through hole 4111 can be used for the connecting piece 43 to connect and fix the plug core 42 and the isolation part 411. In some embodiments, the connecting piece 43 can pass through the connecting through hole 4111 and be screwed to the plug core 42. In some embodiments, the connecting piece 43 can be a screw.

[0055] One end of the plug core 42 can be connected to the isolation part 411, and the other end can penetrate into the valve seat 20 for installation. Specifically, the plug core 42 can include a columnar body 421 and a mating part 422. The columnar body 421 can be inserted into the valve seat 20, and the cross-section of the columnar body 421 can be in the shape of a spline. The mating part 422 can be arranged at one end of the columnar body 421 and can be connected to the isolation part 411.

[0056] The plug core 42 is provided with a second seal 44 and a third seal 45; the second seal 44 can be arranged on the bottom surface of the mating part 422 for hermetically connecting the mating part 422 and the isolation part 411. In some embodiments, the second seal 44 can be a sealing ring. Specifically, it can be a silica gel ring or a rubber ring. In some embodiments, the third seal 45 can be embedded on the side of the mating part 422 opposite to the valve seat 20. When the isolation part 411 is in contact with the valve seat 20, it can hermetically connect the valve seat 20 and the mating part 422. By providing the second seal 44 and the third seal 45, the plug core 42 has two sealing forms and has the function of automatically enhancing the seal, which can ensure that the radioactive medium can be properly sealed even in a sudden pressure test state. The self-weight of the plug core 42 will affect the maintenance of the film state, so it is designed to support on the plug core 42-valve seat 20 seal pair.

[0057] In some embodiments, the connecting structure 50 includes a compression ring 51 and a third screw 52. The compression ring 51 can be pressed on the connecting part 412, and the compression ring 51, the connecting part 412 and the first valve body 11 can be connected and fixed by the third screw 52.

[0058] In some embodiments, the isolation device 100 further includes an indicating structure 60; the indicating structure 60 can be used to indicate the position of the plug core 42, and thus to indicate the position of the isolation portion 411, so as to facilitate the operator to observe whether the isolation portion 411 reaches the blocking position. In some embodiments, the indicating structure 60 can be connected to an end of the plug core 42 away from the isolation portion 411. In some embodiments, the indicating structure 60 includes an indicating rod 61, a first magnetic member 62, and a second magnetic member 63; the indicating rod 61 is a dark rod, which can penetrate into the positioning column 132 and can move along the axial direction of the positioning column 132 under the drive of the isolation portion 411. The indicating rod 61 can be made of a light material to reduce the force on the diaphragm. The first magnetic member 62 can be installed at an end of the indicating rod 61 away from the plug core 62 through a connecting screw 64. In some embodiments, the first magnetic member 61 can be a magnet and can be in a ring shape. The second magnetic member 63 can be disposed on the valve body 10 and exposed to the outside of the valve body 10. Specifically, it can be disposed in the guiding groove 1321 of the positioning column 132 and cooperate with the first magnetic member 62. In some embodiments, the second magnetic member 63 can be a magnet and can be in a spherical shape. When the first magnetic member 62 moves, the second magnetic member 63 can move in the guiding groove 1321, so as to facilitate the operator to observe the position of the isolation portion 411. By using a magnetic structure to mark the position of the plug core 42, the boundary integrity of the entire device can be ensured. In some embodiments, the guiding groove 1321 can be sealed with a transparent window glass. Since it is difficult for the window glass to meet the requirement of 50 bar, the indicating rod 61 is designed as a dark rod.

[0059] As Figure 8 shown, the application of the isolation device 100 can be as follows:

[0060] Connect the first exhaust hole 115 of the isolation device 100 to the first exhaust pipe, and a first exhaust valve is provided on the first exhaust pipe; connect the second exhaust pipe to the second exhaust hole 125, and a second exhaust valve is provided on the second exhaust pipe; connect the water injection hole 116 to the first water injection pipe, and a first isolation valve 101 is provided on the first water injection pipe; connect the second water injection pipe to the pressure taking hole 1221, and a second isolation valve 102 is provided on the second water injection pipe, and connect the second water injection pipe to the first water injection pipe; the first exhaust hole 115 can be connected to the input pipeline of the radioactive medium system connected with a safety valve, and a third isolation valve 103 is provided in the radioactive medium system; connect the pressure input pipeline to the pressure taking hole 1221 through a banjo joint, and a fourth isolation valve 104 is provided on the pressure input pipeline.

[0061] First, all valves can be opened. After the pressure is balanced, all valves are closed. An electronic pressure gauge is connected at the position where the radioactive medium system is accessed. The third isolation valve 103, the first exhaust valve, and the fourth isolation valve 104 are opened. It is measured that the air pressure in the contaminated side (the first chamber 112) is charged to 1 bar·g. The third isolation valve 103 is closed, the first water injection pipeline is connected to the water injection device, the water injection speed is adjusted to slow water injection, the second isolation valve 102 is opened, the fourth isolation valve 104 is closed. When continuous water flow appears downstream of the second exhaust valve, then the second isolation valve 102 and the first exhaust valve are closed. When the indication of the plug core 42 returns to the normal position by opening the first exhaust valve and the second isolation valve 102, the first isolation valve 101 is opened. When continuous water flow appears downstream of the first exhaust valve, all valves are closed, and the water injection and exhaust of the isolation device 100 are completed. The pressure input pipeline is connected to the pressure transmitter. The fourth isolation valve 104, the second isolation valve 102, and the exhaust valve on the pressure transmitter are opened. When continuous water flow is discharged, all valves are closed, that is, the water injection and exhaust of the pressure transmitter are completed.

[0062] The water injection device is removed, and then the isolation device 100 and the pressure transmitter are transported to the site together. The third isolation valve 103 is connected to the radioactive medium system connected with the safety valve, and the exhaust operation is completed through the first exhaust valve.

[0063] The test content is executed. After the test is completed, the pollution situation is measured. The isolation device 100 is turned over, the electronic pressure gauge is connected to the water injection position, the first exhaust valve and the second exhaust valve are opened, and then the first isolation valve 101 is opened. The isolation device 100 is continuously pressurized to completely drain the internal water. During this process, the water discharged from the contaminated side and the clean water side can be separately collected.

[0064] Finally, the isolation device 100 is completely disassembled, the measured pollution situation is decontaminated, and then the components are wiped and stored.

[0065] The differential pressure test is carried out on the isolation device 100.

[0066] The isolation device 100 is connected to the standard pressure measuring equipment. A calibrated qualified pressure transmitter is connected to the standard device, the pressure output position of the standard device is connected to the pressure input of the device, and then another calibrated transmitter is connected to the pressure measuring outlet of the device. Keep the two transmitters at the same horizontal plane position and start the pressurization test.

[0067] The test results are as Figure 9 shown. The results show that the pressure following performance is good, the differential pressure between the two sides is stable at 0.3 bar. During actual measurement, only 0.3 bar differential pressure needs to be directly added, and the metrological evaluation is available. Among them, the system pressure during the test is about 43 bar, so the interval of 40 - 45 bar is selected for evaluation.

[0068] Perform a pressure loss tightness test on the isolation device 100.

[0069] To simulate a pressure loss situation, directly open the second isolation valve 102 when the device is under pressure. The second magnetic part 63 quickly moves to the edge, indicating that the plug core 42 is completely closed. At this time, the pressure curve changes as Figure 10 shown: The curve shows that although the pressure at the pressure measurement position has decreased to almost zero, the pressure on the pressure input side still remains at about 50 bar, indicating that the device has successfully completed pressure isolation, that is, the test is successful.

[0070] The isolation device 100 can isolate the pressure transmitter and radioactive medium. When the isolation device 100 is contaminated, it can be easily decontaminated. The on-site operation is simple, and a pressure loss protection function is set to prevent radioactive leakage. The isolation device 100 can cooperate with standard measuring instruments to calibrate the contaminated pressure transmitter, making the original pressure transmitter reusable and reducing the generation of solid waste.

[0071] The functional characteristics and significance that the isolation device 100 can achieve are:

[0072] 1. Do not affect the experimental accuracy and ensure the reliability of the GOR experiment

[0073] 2. Reduce the consumption of transmitter tools and save costs

[0074] 3. Effectively prevent radioactive leakage and reduce on-site operation risks at the same time

[0075] 4. Reduce the generation of solid waste

[0076] It can be understood that the above embodiments only represent the preferred embodiments of the present invention. The description is relatively specific and detailed, but it cannot be construed as a limitation on the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. An isolation device, characterized in that, It includes a valve body (10), a valve seat (20), and an isolation structure (41); The valve body (10) includes a first chamber (112) and a second chamber (123); the second chamber (123) is connected to an external pressure measuring instrument; the first chamber (112) is connected to a valve that needs to be pressure-measured; the valve body (10) includes a second valve body (12) and a first valve body (11) assembled with the second valve body (12); the first chamber (112) is formed in the first valve body (11), and the second chamber (123) is formed in the second valve body (12); an opening (1120) communicating with the first chamber (112) is provided on the first valve body (11); the second valve body (12) includes a covering portion (121) covering the opening (1120); a mounting hole (1211) is provided at the central axis of the covering portion (121); The valve seat (20) is disposed between the first chamber (112) and the second chamber (123); the valve seat (20) is installed at the mounting hole (1211) and extends toward the second chamber (123); The isolation structure (41) is movably disposed in the first chamber (112) in the direction of the valve seat (20), so as to move toward the valve seat (20) and seal with the valve seat (20) under the push of the radioactive medium when the radioactive medium enters the first chamber (112), isolating the media in the first chamber (112) and the second chamber (123); the isolation structure (41) includes an isolation portion (411); the isolation portion (411) deforms under the push of the radioactive medium and fits with the valve seat (20).

2. The isolation device according to claim 1, wherein, The cross-sectional shape of the isolation portion (411) is adapted to the first chamber (112), and the cross-sectional size of the isolation portion (411) is adapted to the cross-sectional size of the first chamber (112).

3. The isolation device according to claim 1, wherein, The valve seat (20) is a structure with both ends penetrating through; The isolation device includes a plug core (42), one end of the plug core (42) is connected to the isolation portion (411), and the other end penetrates into the valve seat (20) and seals with the valve seat (20) driven by the deformation of the isolation portion (411).

4. The isolation device according to claim 3, wherein, The isolation device further includes an indication structure (60), the indication structure (60) is connected to the end of the plug core (42) away from the isolation portion (411), and is used to indicate the position of the isolation portion (411).

5. The isolation device according to claim 4, characterized in that, The indication structure (60) includes an indication rod (61), a first magnetic member (62), and a second magnetic member (63); The indication rod (61) is connected to the plug core (42), the first magnetic member (62) is disposed at the end of the indication rod (61) away from the plug core (42), the second magnetic member (63) is disposed on the valve body (10), cooperates with the first magnetic member (62), and is exposed outside the valve body (10) for an operator to observe.

6. The isolation device according to claim 1, characterized in that, The isolation structure (41) is a thin film structure.

7. The isolation device according to claim 1, wherein A sealing structure (30) is provided between the valve seat (20) and the mounting hole (1211).

8. The isolation device according to claim 7, characterized in that, The isolation structure (41) includes an isolation portion (411) and a connecting portion (412) disposed on the outer periphery of the isolation portion (411).

9. The isolation device according to claim 1, characterized in that A water injection hole (116) is provided on the valve body (10), and the water injection hole (116) communicates with the first chamber (112). A communication hole (124) is provided on the valve body (10), the communication hole (124) communicates with the first chamber (112), and a check valve is provided at the communication hole (124) to prevent the medium in the second chamber (123) from flowing into the first chamber (112). And / or, a first exhaust hole (115) is provided on the valve body (10), and the first exhaust hole (115) communicates with the first chamber (112). And / or, a second exhaust hole (125) is provided on the valve body (10), and the second exhaust hole (125) communicates with the first chamber (112). And / or, a pressure tapping hole (1221) is provided on the valve body (10), and the pressure tapping hole (1221) communicates with the second chamber (123).

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