Nuclear safety level one-driving-two structure on-site filling remote transmission flange transmitter

Abstract

The invention relates to the field of measuring equipment, in particular to a nuclear safety level one-driving-two structure on-site filling remote transmission flange transmitter which comprises a three-way pipe, a first capillary tube is fixedly installed at one end of the three-way pipe, and second capillary tubes are fixedly installed at the other two ends of the three-way pipe. The end, away from the three-way pipe, of the first capillary pipe is fixedly connected with a detection flange, the end, away from the three-way pipe, of the second capillary pipe is fixedly provided with a connector, the connector is fixedly connected with an installation base, a differential diaphragm capsule is installed in the installation base, and an electric shell is fixedly installed on the top side of the installation base. The two differential diaphragm capsules are different in measuring range, and the electrical shell is used for placing electrical elements. The method has the effect of reducing the number of penetration pieces on the containment wall.

Description

Technical Field

[0001] The present application relates to the field of measuring equipment, and in particular to a nuclear safety-grade one-to-two structure field filling remote transmission flange transmitter. Background Art

[0002] Nuclear safety grade remote transmission flange transmitter is suitable for nuclear power plants and nuclear industry process control systems. It is used to continuously measure process parameters such as differential pressure, pressure, absolute pressure of gas, liquid and steam, and convert the pressure signal into 4~20mADC standard output signal. It has extremely high accuracy and reliability and can work normally in extremely harsh environments.

[0003] Usually, the remote flange transmitter has been filled with oil before leaving the factory, but the flange part of the field transmitter must be located inside the nuclear reactor containment, and the transmitter body must be located outside the nuclear reactor containment. The capillary connecting the two must pass through two layers of containment walls. The size of the penetration on the containment wall is much smaller than the size of the flange part, and its size is only large enough for the capillary to pass through. Therefore, the transmitter body, capillary and flange part need to be assembled and welded on site, and the field oil filling is completed.

[0004] Due to the limited number of penetrations on the containment wall, it is necessary to achieve wide and narrow range measurements in the containment at the same time, and the traditional remote flange transmitter usually consists of one flange connected to one transmitter. In other words, to achieve wide range and narrow range measurements, it is necessary to set up remote flange transmitters separately, thereby increasing the number of penetrations on the containment wall. Summary of the invention

[0005] In order to reduce the number of penetrations on the containment wall, the present application provides a nuclear safety-level one-to-two structure on-site filling remote transmission flange transmitter.

[0006] This application provides a nuclear safety level one-to-two structure field filling remote transmission flange transmitter, which adopts the following technical solutions: A nuclear safety-level one-to-two structure field filling remote transmission flange transmitter comprises a tee, one end of the tee is fixedly mounted with a first capillary, the other two ends of the tee are fixedly mounted with second capillaries, the end of the first capillary away from the tee is fixedly connected with a detection flange, the end of the second capillary away from the tee is fixedly mounted with a joint, the joint is fixedly connected with a mounting seat, a differential diaphragm box is installed inside the mounting seat, an electrical housing is fixedly mounted on the top side of the mounting seat, the two differential diaphragms have different measuring ranges, and the electrical housing is used to place electrical components.

[0007] By adopting the above technical solution, after the detection flange is pressurized, silicone oil flows from the first capillary into the tee. After being split by the tee, the silicone oil flows into two second capillaries, and the second capillaries guide the silicone oil into the differential diaphragm box. The electrical components inside the electrical housing are subjected to the pressure of the silicone oil according to the differential diaphragm box, thereby detecting the pressure. The two differential diaphragms are respectively set with different ranges, thereby realizing wide range and narrow range measurement. At the same time, the two differential diaphragms share the first capillary and the detection flange through the tee, thereby reducing the number of penetrations on the containment wall.

[0008] Optionally, a first oil filling port is provided on the circumferential side of the detection flange, the first oil filling port is communicated with a first capillary tube, and the joint is provided with a second oil filling port, the second oil filling port is communicated with a second capillary tube.

[0009] By adopting the above technical solution, the first oil filling port on the detection flange is connected to the first capillary tube, and the second oil filling port on the joint is connected to the second capillary tube, so that the oil filling operation can be carried out separately inside and outside the nuclear reactor containment, avoiding the assembly difficulties caused by the size limitation of the containment wall penetration parts, and improving the installation efficiency and maintenance convenience of the equipment.

[0010] Optionally, the differential diaphragm box includes a central diaphragm, and the differential diaphragm box also includes a cup body, a glass body, a capacitor plate, a circular tube, a lead wire and an isolation diaphragm symmetrically arranged on both sides of the central diaphragm, both sides of the cup body are recessed, one side of the cup body is fixedly connected to the central diaphragm, and the other side of the cup body is fixedly connected to the mounting seat, one side of the cup body away from the central diaphragm is connected to the joint, the glass body is fixedly installed on the side of the cup body facing the central diaphragm, the capacitor plate is fixedly installed on the side of the glass body close to the central diaphragm, the circular tube is fixedly passed through the capacitor plate, the glass body and the cup body, one end of the lead wire is fixedly connected to the capacitor plate, and the other end of the lead wire is used to enter the electrical housing and connect with the electrical component, the edge of the isolation diaphragm is fixedly connected to the side of the cup body away from the central diaphragm, the space on both sides of the central diaphragm is used to inject silicone oil, and the central diaphragms of the two differential diaphragm boxes have different thicknesses.

[0011] By adopting the above technical solution, the thickness of the central diaphragm is changed, thereby facilitating the use of the differential diaphragm box for detection of different ranges.

[0012] Optionally, a side of the glass body close to the central diaphragm is bent and arranged away from the central diaphragm, and the capacitor plate is in contact with the side of the glass body close to the central diaphragm.

[0013] By adopting the above technical solution, the central diaphragm will bend to one side when it is under pressure, and when the central diaphragm is overloaded on one side, the central diaphragm fits the capacitor plate. The capacitor plate supports the central diaphragm, thereby reducing the possibility of damage to the central diaphragm after being overloaded on one side.

[0014] Optionally, a connecting rod is provided on the cup body away from the joint, one end of the connecting rod is against the isolation diaphragm, a plug is fixedly installed on the other end of the connecting rod, the mounting seat is provided with a first vent hole for the plug to pass through, and the side of the plug away from the connecting rod is conical.

[0015] By adopting the above technical solution, after the detection flange is compressed, the silicone oil drives the center diaphragm to bend away from the joint, and the isolation diaphragm will also bend away from the joint, and then the isolation diaphragm drives the plug to enter the first vent through the connecting rod. When the bending of the center diaphragm reaches the maximum range, the isolation diaphragm drives the plug to block the first vent through the connecting rod. After that, the pressure on the center diaphragm continues to increase, and the center diaphragm will bend further until the center diaphragm fits the capacitor plate away from the joint, so that the isolation diaphragm away from the joint will continue to bend and deform, thereby reducing the internal space on the side of the cup away from the center diaphragm and increasing the air pressure. By increasing the air pressure, a reaction force is applied to the isolation diaphragm, thereby reducing the possibility of damage to the center diaphragm and the isolation diaphragm after unidirectional overload.

[0016] Optionally, a pressurizing port is opened on a side of the mounting seat away from the joint, a pressurizing membrane is fixedly installed inside the pressurizing port, and a driving component is installed on the pressurizing membrane, and the driving component is used to push the pressurizing membrane to move toward the cup body when the plug blocks the first vent hole.

[0017] By adopting the above technical solution, after the plug blocks the first vent hole, the drive assembly pushes the pressurized membrane toward the central diaphragm, thereby further increasing the air pressure on the isolation diaphragm away from the joint, thereby reducing the possibility of damage to the central diaphragm and the isolation diaphragm after unidirectional overload.

[0018] Optionally, the driving assembly includes a push rod, a pressure block and a driving rod, one end of the push rod is fixedly mounted on a side of the plug away from the connecting rod, the pressure block is slidably penetrated through the pressure port, the pressure block is fixedly connected to the middle part of a side of the pressure membrane away from the joint, the rod body of the driving rod is hinged to a side of the mounting seat away from the joint, one end of the driving rod is abutted against an end of the push rod away from the plug, and the other end of the driving rod is slidingly hinged to a side of the pressure block away from the pressure membrane.

[0019] By adopting the above technical solution, after the plug blocks the first vent hole, the plug squeezes the end of the driving rod away from the pressure block through the push rod, and the driving rod drives the pressure block to move toward the central diaphragm. The pressure block squeezes the pressure membrane to move toward the central diaphragm, thereby facilitating the increase of the air pressure on the isolation diaphragm away from the joint, thereby reducing the possibility of damage to the central diaphragm and the isolation diaphragm after unidirectional overload.

[0020] Optionally, the driving assembly further comprises a torsion spring, wherein the torsion spring is installed between the driving rod and the mounting seat, and the torsion spring is used for driving the driving rod to rotate away from the pressurizing membrane.

[0021] By adopting the above technical solution, when the pressure on the central diaphragm is reduced and retracted, the torsion spring drives the driving rod to reset, and the driving rod drives the plug to return through the push rod, so that the first vent hole is opened.

[0022] Optionally, a push plate is fixedly mounted on one end of the connecting rod away from the plug, the push plate is in contact with the isolation diaphragm, the peripheral side of the push plate is in contact with the inner peripheral wall of the cup body, and the push plate is provided with a plurality of second vent holes.

[0023] By adopting the above technical solution, the push plate abuts against the isolation diaphragm, which can effectively disperse the pressure, thereby reducing the occurrence of mutual compression and damage between the isolation diaphragm and the connecting rod. The peripheral side of the push plate abuts against the inner peripheral wall of the cup body, thereby facilitating the alignment of the plug block with the first vent hole.

[0024] Optionally, the second ventilation holes are arranged at intervals along the edge of the push plate.

[0025] By adopting the above technical solution, when the isolation diaphragm bends and presses the push plate, the contact position between the isolation diaphragm and the push plate is in the middle. The second vent hole is arranged at the edge, thereby reducing the possibility of blockage of the second vent hole.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By using a tee to connect the first capillary tube and the two second capillaries, it is possible to connect two transmitters under one detection flange, thereby achieving wide and narrow range measurements. At the same time, when connecting the detection flange in the nuclear reactor containment shell with the transmitter outside the nuclear reactor containment shell, only the first capillary tube is required to pass through the nuclear reactor containment shell, thereby reducing the number of penetrations on the containment shell wall.

[0027] 2. When the center diaphragm is overloaded in one direction, the isolation diaphragm drives the plug to block the first vent hole through the connecting rod, and the driving assembly drives the pressurized membrane to move toward the center diaphragm, thereby reducing the space on the side of the isolation diaphragm away from the center diaphragm, thereby increasing the pressure on the side of the isolation diaphragm away from the center diaphragm. By increasing the pressure on the side of the isolation diaphragm away from the center diaphragm, the possibility of damage to the center diaphragm and the isolation diaphragm after unidirectional overload is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 is a cross-sectional view of a portion of the structure of Example 1 of the present application; Figure 3 yes Figure 2A magnified view at point A; Figure 4 is a cross-sectional view of a portion of the structure of Example 2 of the present application; Figure 5 yes Figure 4 Enlarged view at B.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. three-way pipe; 2. first capillary; 3. second capillary; 4. detection flange; 5. joint; 6. mounting seat; 7. differential diaphragm box; 8. electrical housing; 9. first oil filling port; 10. second oil filling port; 11. center diaphragm; 12. cup body; 13. glass body; 14. capacitor plate; 15. round tube; 16. lead wire; 17. isolation diaphragm; 18. connecting rod; 19. push plate; 20. first air vent; 21. second air vent; 22. plug; 23. pressurizing port; 24. pressurizing membrane; 25. drive assembly; 251. pressurizing block; 252. drive rod; 253. torsion spring; 254. push rod. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] Example 1.

[0032] The embodiment of the present application discloses a nuclear safety-level one-to-two structure field filling remote transmission flange transmitter.

[0033] Reference Figure 1 , Figure 2 A nuclear safety-level one-to-two structure field filling remote transmission flange transmitter includes a tee 1, a first capillary 2 is fixedly installed at one end of the tee 1, and a second capillary 3 is fixedly installed at the other two ends of the tee 1. The end of the first capillary 2 away from the tee 1 is fixedly connected to a detection flange 4, and the end of the second capillary 3 away from the tee 1 is fixedly installed with a joint 5. The joint 5 is fixedly connected to a mounting seat 6, and a differential diaphragm box 7 is installed inside the mounting seat 6, and the two differential diaphragm boxes 7 have different ranges. An electrical housing 8 is fixedly installed on the top side of the mounting seat 6, and the electrical housing 8 is used to place electrical components. A first oil filling port 9 is opened on the peripheral side of the detection flange 4, and the first oil filling port 9 is connected to the first capillary 2. The joint 5 is provided with a second oil filling port 10, and the second oil filling port 10 is connected to the second capillary 3.

[0034] Place the detection flange 4 in the nuclear reactor containment, and the differential diaphragm box 7 outside the nuclear reactor containment. Then one end of the first capillary tube 2 is connected to the detection flange 4, and the other end of the first capillary tube 2 passes through the through-piece on the nuclear reactor containment and is connected to the tee 1. The other two ends of the tee 1 are respectively connected to the mounting seat 6 through the second capillary tube 3 and the joint 5, and one end of the differential diaphragm box 7 is connected to the joint 5. Then, silicone oil is injected into the remote flange transmitter through the first oil filling port 9 and the second oil filling port 10, thereby completing the installation of the remote flange transmitter.

[0035] The two differential diaphragm boxes 7 can be set with a wide range and a narrow range, thereby realizing wide range and narrow range measurement. In addition, only one first capillary tube 2 passes through the containment of the nuclear reactor, thereby reducing the number of penetrations on the containment wall.

[0036] Reference Figure 2 , Figure 3 The differential diaphragm box 7 includes a central diaphragm 11, and the differential diaphragm box 7 also includes a cup body 12, a glass body 13, a capacitor plate 14, a round tube 15, a lead wire 16 and an isolation diaphragm 17 symmetrically arranged on both sides of the central diaphragm 11. The differential diaphragm box 7 includes two identical cup bodies 12, and both sides of the cup body 12 are recessed. One side of the cup body 12 is welded to the central diaphragm 11, and the other side of the cup body 12 is fixedly connected to the mounting seat 6. The edge of the isolation diaphragm 17 is fixedly installed on the inner wall of the cup body 12 away from the central diaphragm 11.

[0037] The side of one cup body 12 away from the central diaphragm 11 is connected to the joint 5, and the side of the other cup body 12 away from the central diaphragm 11 is connected to the atmosphere. The glass body 13 is fixedly installed on the side of the cup body 12 facing the central diaphragm 11. The capacitor plate 14 is fixedly installed on the side of the glass body 13 close to the central diaphragm 11, and the round tube 15 is fixedly passed through the capacitor plate 14, the glass body 13 and the cup body 12. One end of the lead wire 16 is fixedly connected to the capacitor plate 14, and the other end of the lead wire 16 is fixedly passed through the cup body 12 and the electrical casing 8 and then enters the interior of the electrical casing 8, and is connected to the electrical casing 8 and the electrical components. The space on both sides of the central diaphragm 11 is used to inject silicone oil. The central diaphragms 11 of the two differential diaphragm boxes 7 have different thicknesses, thereby realizing the measurement of different ranges by the two differential diaphragm boxes 7.

[0038] In the present application, the side of the differential diaphragm box 7 close to the joint 5 is the active side, and the side of the differential diaphragm box 7 away from the joint 5 is the passive side.

[0039] After the detection flange 4 is pressurized, the silicone oil inside the detection flange 4 flows to the first capillary 2. Then the silicone oil flows into the active side cup body 12 along the tee 1, the second capillary 3 and the joint 5, so that the silicone oil squeezes the isolation diaphragm 17 on the active side. After being pressurized, the active side isolation diaphragm 17 bends toward the passive side, and the isolation diaphragm 17 drives the silicone oil to squeeze the central diaphragm 11, so that the central diaphragm 11 bends and deforms toward the passive side. After the central diaphragm 11 bends and deforms toward the passive side, the distance between the central diaphragm 11 and the two capacitor plate electrodes 14 changes. The lead wire 16 transmits the capacitance change of the capacitor plate electrode 14 to the electrical components inside the electrical housing 8, and the electrical components calculate the pressure on the detection flange 4 based on the difference between the two capacitor plate electrodes 14.

[0040] The side of the glass body 13 close to the central diaphragm 11 is bent and arranged away from the central diaphragm 11 , and the capacitor plate 14 is in contact with the side of the glass body 13 close to the central diaphragm 11 .

[0041] When the pressure on the detection flange 4 is greater than the preset tolerable pressure, the central diaphragm 11 bends toward the passive side and abuts against the capacitor plate 14. The capacitor plate 14 is bent to fit the central diaphragm 11, thereby providing good support for the central diaphragm 11, thereby reducing the possibility of damage to the central diaphragm 11 after unilateral overload.

[0042] The implementation principle of a nuclear safety-level one-to-two structure on-site filling remote flange transmitter in an embodiment of the present application is as follows: when the remote flange transmitter is installed in a nuclear power plant, when the detection flange 4 located inside the nuclear reactor containment and the differential diaphragm box 7 outside the nuclear reactor containment are connected, only the first capillary tube 2 is required to pass through the nuclear reactor containment, thereby reducing the number of penetrations on the containment wall.

[0043] Example 2.

[0044] The embodiment of the present application discloses a nuclear safety-level one-to-two structure field filling remote transmission flange transmitter.

[0045] Reference Figure 4 , Figure 5 The difference between the one-to-two structure field filling remote transmission flange transmitter of nuclear safety level in the embodiment of the present application and the embodiment 1 is that the cup body 12 far away from the joint 5 is provided with a connecting rod 18, and a push plate 19 is fixedly installed at one end of the connecting rod 18, and the peripheral side of the push plate 19 abuts against the inner peripheral wall of the cup body 12, and the push plate 19 abuts against the isolation diaphragm 17 on the passive side. The push plate 19 is provided with a plurality of second vent holes 21, and the second vent holes 21 are arranged at intervals along the edge of the push plate 19.

[0046] A plug block 22 is fixedly mounted on one end of the connecting rod 18 away from the push plate 19, and the end of the plug block 22 away from the connecting rod 18 is tapered. The mounting seat 6 is provided with a first vent hole 20 for the plug block 22 to pass through.

[0047] The peripheral side of the push plate 19 abuts against the inner peripheral wall of the cup body 12, so that the plug 22 is aligned with the first vent hole 20. The second vent hole 21 facilitates the isolation diaphragm 17 to communicate with the atmosphere, and the second vent hole 21 is on the peripheral side of the push plate 19, thereby reducing the isolation diaphragm 17 from blocking the second vent hole 21.

[0048] When the detection flange 4 is pressed, the center diaphragm 11 is bent and deformed toward the passive side, and the center diaphragm 11 drives the silicone oil to move toward the passive side. The silicone oil enters from the round tube 15 on the passive side and squeezes the isolation diaphragm 17 on the passive side, so that the isolation diaphragm 17 on the passive side is bent and deformed toward the passive side. The isolation diaphragm 17 on the passive side drives the plug 22 to enter the first vent 20 through the push plate 19 and the connecting rod 18.

[0049] When the maximum value of the range is reached, the central diaphragm 11 bends toward the passive side and does not abut against the capacitor plate 14 on the passive side, and the plug 22 enters the first vent 20 to block it. After the pressure on the central diaphragm 11 is further increased, until the central diaphragm 11 abuts against the capacitor plate 14, the central diaphragm 11 is overloaded on one side. After the central diaphragm 11 is overloaded on one side, the capacitor plate 14 blocks the central diaphragm 11 from continuing to bend and deform toward the passive side, thereby protecting the central diaphragm 11. At the same time, after the central diaphragm 11 is overloaded on one side, the isolation diaphragm 17 on the passive side continues to bend and deform toward the passive side, and the plug 22 blocks the first vent 20, thereby reducing the space on the passive side isolation diaphragm 17 away from the side of the central diaphragm 11, and increasing the pressure on the passive side isolation diaphragm 17, thereby reducing the pressure difference on both sides of the passive side isolation diaphragm 17, thereby protecting the isolation diaphragm 17.

[0050] Reference Figure 4 , Figure 5 A pressurizing port 23 is provided on the side of the mounting seat 6 away from the joint 5, a pressurizing film 24 is fixedly installed inside the pressurizing port 23, and a driving assembly 25 is installed on the pressurizing film 24. The driving assembly 25 includes a push rod 254, a pressurizing block 251, a driving rod 252 and a torsion spring 253. One end of the push rod 254 is fixedly connected to the side of the plug 22 away from the connecting rod 18, the pressurizing block 251 is slidably arranged in the pressurizing port 23, and the pressurizing block 251 is fixedly connected to the middle part of the side of the pressurizing film 24 away from the joint 5. The rod body of the driving rod 252 is hinged to the side of the mounting seat 6 away from the joint 5, and one end of the driving rod 252 is against the push rod 254. The other end of the driving rod 252 is hingedly connected to the side of the pressure block 251 away from the pressure film 24, and a ring sleeve is put on the driving rod 252, and the ring sleeve slides on the driving rod 252. The outer wall of the ring sleeve is hingedly connected to the pressure block 251, thereby realizing the sliding hinge connection between the driving rod 252 and the pressure block 251. The torsion spring 253 is installed between the driving rod 252 and the mounting seat 6, and the torsion spring 253 is used to drive the driving rod 252 to rotate away from the pressure film 24.

[0051] After the plug 22 blocks the first vent hole 20, the plug 22 pushes the driving rod 252 to rotate toward the extrusion membrane through the push rod 254. The driving rod 252 drives the pressurizing block 251 to squeeze the pressurizing membrane 24, and the pressurizing membrane 24 deforms toward the central diaphragm 11, thereby increasing the pressure on the side of the passive side isolation diaphragm 17 facing the passive side, thereby reducing the pressure difference on both sides of the passive side, and protecting the isolation diaphragm 17.

[0052] The implementation principle of a nuclear safety-level one-to-two structure field filling remote transmission flange transmitter in the embodiment of the present application is as follows: after the detection flange 4 is subjected to pressure, the pressure on the detection flange 4 will squeeze the active side of the central diaphragm 11 through the silicone oil, thereby bending the central diaphragm 11 toward the passive side. If the central diaphragm 11 is overloaded on one side, the central diaphragm 11 will be pressed against the capacitor plate 14 on the passive side. The capacitor plate 14 supports the central diaphragm 11, thereby reducing the possibility of the central diaphragm 11 being squeezed and ruptured.

[0053] When the central diaphragm 11 squeezes the capacitor plate 14, the central diaphragm 11 drives the isolation diaphragm 17 on the passive side to bend and deform toward the passive side through the silicone oil, and the isolation diaphragm 17 drives the plug 22 to block the first vent 20 through the push plate 19 and the connecting rod 18, and then the plug 22 pushes the driving rod 252 to rotate toward the pressurizing film 24 through the push rod 254. When the driving rod 252 rotates toward the pressurizing film 24, the driving rod 252 drives the driving block to press the pressurizing film 24 toward the central diaphragm 11, thereby increasing the pressure on the isolation diaphragm 17 on the passive side, thereby reducing the pressure difference between the passive side and the active side of the isolation diaphragm 17, and protecting the isolation diaphragm 17.

[0054] The pressure on the passive side of the isolation diaphragm 17 increases, and the isolation diaphragm 17 transmits force through the silicone oil, thereby reducing the pressure difference between the central diaphragm 11 and the detection flange 4, thereby protecting the central diaphragm 11 and the detection flange 4.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A nuclear safety grade one-to-two structure field filling remote transmission flange transmitter, characterized in that: The invention comprises a three-way tube (1), wherein a first capillary tube (2) is fixedly mounted on one end of the three-way tube (1), and second capillary tubes (3) are fixedly mounted on the other two ends of the three-way tube (1), and a detection flange (4) is fixedly connected to the end of the first capillary tube (2) away from the three-way tube (1), and a joint (5) is fixedly mounted on the end of the second capillary tube (3) away from the three-way tube (1), and the joint (5) is fixedly connected to a mounting seat (6), a differential diaphragm box (7) is mounted inside the mounting seat (6), and an electrical housing (8) is fixedly mounted on the top side of the mounting seat (6), the two differential diaphragm boxes (7) have different measuring ranges, and the electrical housing (8) is used to place electrical components.

2. According to claim 1, a nuclear safety level one-to-two structure field filling remote transmission flange transmitter, characterized in that: A first oil filling port (9) is provided on the circumferential side of the detection flange (4), the first oil filling port (9) being in communication with the first capillary tube (2), and a second oil filling port (10) is provided on the joint (5), the second oil filling port (10) being in communication with the second capillary tube (3).

3. According to claim 1, a nuclear safety level one-to-two structure on-site filling remote transmission flange transmitter is characterized in that: The differential diaphragm box (7) comprises a central diaphragm (11), and the differential diaphragm box (7) further comprises a cup body (12), a glass body (13), a capacitor plate (14), a round tube (15), a lead wire (16) and an isolation diaphragm (17) symmetrically arranged on both sides of the central diaphragm (11), both sides of the cup body (12) are recessed, one side of the cup body (12) is fixedly connected to the central diaphragm (11), and the other side of the cup body (12) is fixedly connected to the mounting seat (6), one side of the cup body (12) away from the central diaphragm (11) is connected to the joint (5), and the glass body (13) is fixedly installed on the cup body (12) facing the central diaphragm (11). 11), the capacitor plate electrode (14) is fixedly mounted on a side of the glass body (13) close to the central diaphragm (11), the round tube (15) is fixedly passed through the capacitor plate electrode (14), the glass body (13) and the cup body (12), one end of the lead wire (16) is fixedly connected to the capacitor plate electrode (14), the other end of the lead wire (16) is used to enter the electrical housing (8) and connect with the electrical component, the edge of the isolation diaphragm (17) is fixedly connected to a side of the cup body (12) away from the central diaphragm (11), the space on both sides of the central diaphragm (11) is used to inject silicone oil, and the central diaphragms (11) of the two differential diaphragm boxes (7) have different thicknesses.

4. According to claim 3, a nuclear safety level one-to-two structure field filling remote transmission flange transmitter is characterized in that: The side of the glass body (13) close to the central diaphragm (11) is bent and arranged away from the central diaphragm (11), and the capacitor plate (14) is in contact with the side of the glass body (13) close to the central diaphragm (11).

5. According to claim 3, a nuclear safety level one-to-two structure on-site filling remote transmission flange transmitter is characterized in that: A connecting rod (18) is provided on the cup body (12) away from the joint (5), one end of the connecting rod (18) is in contact with the isolation diaphragm (17), a plug (22) is fixedly mounted on the other end of the connecting rod (18), the mounting seat (6) is provided with a first vent hole (20) for the plug (22) to pass through, and a side of the plug (22) away from the connecting rod (18) is tapered.

6. A nuclear safety level one-to-two structure on-site filling remote transmission flange transmitter according to claim 5, characterized in that: A pressurizing port (23) is provided on a side of the mounting seat (6) away from the joint (5), a pressurizing membrane (24) is fixedly mounted inside the pressurizing port (23), and a driving component (25) is mounted on the pressurizing membrane (24), and the driving component (25) is used to push the pressurizing membrane (24) to move toward the cup body (12) when the plug (22) blocks the first vent hole (20).

7. A nuclear safety grade one-to-two structure on-site filling remote transmission flange transmitter according to claim 6, characterized in that: The driving assembly (25) comprises a push rod (254), a pressure block (251) and a driving rod (252); one end of the push rod (254) is fixedly mounted on a side of the plug block (22) away from the connecting rod (18); the pressure block (251) is slidably arranged in the pressure port (23); the pressure block (251) is fixedly connected to the middle part of the side of the pressure membrane (24) away from the joint (5); the rod body of the driving rod (252) is hinged to the side of the mounting seat (6) away from the joint (5); one end of the driving rod (252) is in contact with an end of the push rod (254) away from the plug block (22); and the other end of the driving rod (252) is slidably hinged to a side of the pressure block (251) away from the pressure membrane (24).

8. A nuclear safety grade one-to-two structure on-site filling remote transmission flange transmitter according to claim 7, characterized in that: The driving assembly (25) further comprises a torsion spring (253), wherein the torsion spring (253) is installed between the driving rod (252) and the mounting seat (6), and the torsion spring (253) is used to drive the driving rod (252) to rotate away from the pressure film (24).

9. A nuclear safety grade one-to-two structure on-site filling remote transmission flange transmitter according to claim 5, characterized in that: A push plate (19) is fixedly mounted on one end of the connecting rod (18) away from the plug (22); the push plate (19) abuts against the isolation diaphragm (17); the peripheral side of the push plate (19) abuts against the inner peripheral wall of the cup body (12); and the push plate (19) is provided with a plurality of second ventilation holes (21).

10. A nuclear safety level one-to-two structure on-site filling remote transmission flange transmitter according to claim 9, characterized in that: The second ventilation holes (21) are arranged at intervals along the edge of the push plate (19).

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