CN211304961U - Be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line - Google Patents
Be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line Download PDFInfo
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- CN211304961U CN211304961U CN201921942792.9U CN201921942792U CN211304961U CN 211304961 U CN211304961 U CN 211304961U CN 201921942792 U CN201921942792 U CN 201921942792U CN 211304961 U CN211304961 U CN 211304961U
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Abstract
The utility model relates to a disk seat sealing ring restores technical field on line specifically discloses a be used for nuclear level gate valve disk seat sealing ring to restore automatic cutting device on line. The device comprises an X-direction mechanism, a Y-direction mechanism, a Z-direction mechanism and a main shaft integrated structure, wherein the main shaft integrated structure can control a cutter at the lower end of the main shaft integrated structure to perform rotary cutting; the Y-direction mechanism is connected with a moving plate in the X-direction mechanism, and the moving plate can move left and right in the X direction relative to a fixed plate A of the X-direction mechanism; the Z-direction mechanism is connected with the X-direction mechanism moving plate and can realize the Z-direction front and back movement. The device can realize the accurate positioning and full-automatic cutting of the position of the cutting device in the direction X, Y, Z; the device can guarantee sufficient machining precision under the high radiation environment, and simultaneously, the personnel irradiation dose is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of online repair of valve seat sealing rings, and particularly relates to an online repair automatic cutting device for a valve seat sealing ring of a nuclear-grade gate valve.
Background
The nuclear-grade valve plays a role in controlling and adjusting the pressure, temperature, flow direction, flow rate and the like of a medium in a nuclear power station. The gate valve is the most widely and commonly applied gate valve, but the design, experiment, manufacturing process and detection system of the gate valve with higher nuclear safety level are only mastered by a few western companies, so that when the valve sealing surface has larger defects and is difficult to repair, a nuclear power plant can only eliminate the defects by replacing the whole valve. Meanwhile, the gate valve with a high nuclear safety grade needs to be purchased for a long period, the whole valve can not be replaced on site in a limited time window, the welded valve replacement process is complex, the on-site maintenance time is long, the radiation safety of maintenance personnel is affected in the environment with high radiation dose, the old valve with high radioactivity is subjected to post-treatment, and other problems are solved. Therefore, in the process of developing a gate valve autonomous design, experiment, manufacturing process and detection system, nuclear-grade valve repairing means are required to be continuously expanded, and the nuclear-grade valve is repaired and then used through maintenance means.
In order to solve the limitations of long period, high cost and high radiation of the whole valve replacement work, the sealing function of the valve is recovered by means of maintenance, and the defect of the sealing surface of the valve seat of the valve is repaired. The on-line repairing automatic cutting device for the valve seat sealing ring of the nuclear-grade gate valve needs to be developed, the cutting work that the sealing surface has corrosion defects and the repaired valve seat ring cannot be repaired by grinding is completed, meanwhile, the automatic processing of a groove is realized in the cutting process, and more favorable conditions are created for the subsequent welding of a new valve seat ring. The key steps for replacing the valve seat ring on line mainly comprise: the automatic cutting of old valve seat ring, old valve seat ring take out, new valve seat ring location, new valve seat ring automatic weld, new weld nondestructive test and new valve seat ring and valve plate adjustment are mated, because nuclear grade gate valve seat ring changes at present and does not have application performance in China at home, the enterprise that possesses relevant technological ability internationally also can be counted, the mechanical device that the step was carried out and is related to does not have very mature product at home, as for the research about realizing online automatic cutting device of valve seat ring under high radiation environment, it is blank at home even more.
At present, the domestic known automatic cutting device has the defects of small application range, incapability of being qualified for automatic cutting operation in narrow spaces such as a valve cavity and the like and low automation degree. Online automatic cutting device for valve seat ring at home and abroad and not applied to high-radiation environment
Disclosure of Invention
The invention aims to provide an on-line repairing automatic cutting device for a valve seat sealing ring of a nuclear-grade gate valve, which solves the problem that the sealing surface of the valve seat of the existing nuclear-grade gate valve is difficult to repair, only adopts a treatment mode of replacing the whole valve, and has a series of difficult problems of long period, high cost, high radiation and the like in the replacement process, and realizes the automatic cutting of the valve seat ring of the gate valve in a high radiation environment so as to achieve the aim of reducing the radiation dose of personnel.
The technical scheme of the invention is as follows: an automatic cutting device for on-line restoration of a valve seat sealing ring of a nuclear-grade gate valve comprises an X-direction mechanism, a Y-direction mechanism, a Z-direction mechanism and a main shaft integrated structure, wherein a cutter at the lower end of the main shaft integrated structure can be controlled to rotate and cut, and the main shaft integrated structure is arranged on the Y-direction mechanism to enable the cutter to move up and down in the vertical Y direction; the Y-direction mechanism is connected with a moving plate in the X-direction mechanism, and the moving plate can move left and right in the X direction relative to a fixed plate A of the X-direction mechanism; the Z-direction mechanism is connected with the X-direction mechanism moving plate and can realize the Z-direction front and back movement.
The X-direction mechanism comprises a moving plate, a linear guide rail A, a ball screw A and a fixing plate A, wherein the linear guide rail A is arranged on the fixing plate A, the moving plate is installed on the linear guide rail A through a linear guide rail seat A, and the ball screw A installed on the fixing plate A can drive a nut seat A connected with the moving plate, so that the moving plate moves left and right relative to the fixing plate A.
The fixing plate A is of a flat plate structure provided with a rectangular through hole, and two linear guide rails A are arranged on the back of the fixing plate A; the front surface of the fixed plate A is provided with a fixed seat A and a motor transmission seat A, a ball screw A is arranged between the fixed seat A and the motor transmission seat A, and the rolling screw A is connected with a stepping motor A arranged on the fixed plate A through a coupler; the ball screw A is provided with a nut seat A, and a connecting block fixed on the moving plate penetrates through a through hole of the fixed plate A and is fixedly connected with the nut seat A.
The Y-direction mechanism comprises a linear guide rail B, a spindle box, a ball screw B and a fixed plate B, wherein the linear guide rail B is vertically fixed on the movable plate, and the spindle box is connected with a linear guide rail seat B matched with the linear guide rail B; the fixed plate B and the linear guide rail B are relatively fixed, the spindle box is matched with a ball screw B installed on the fixed plate B through a motor transmission seat B, the stepping motor B and the fixed plate B are relatively fixed, and the ball screw B is driven to rotate through the stepping motor B, so that the spindle box is driven to move up and down along the linear guide rail B.
The linear guide rail B comprises two linear guide rails which are parallel to each other, and the spindle box shell is connected with a linear guide rail seat B on the linear guide rail B through a connecting plate; the opposite of the linear guide rail B is provided with a fixed plate B, the upper ends of the fixed plate B and the linear guide rail B are connected and fixed through a connecting plate to form a frame structure, the fixed plate B is provided with a fixed seat B and a motor transmission seat B, a ball screw B is arranged between the fixed plate B and the motor transmission seat B, and the ball screw B is connected with a stepping motor B arranged on the fixed plate B through a coupler; and the nut seat B matched with the ball screw B is fixed with the shell of the main spindle box through a connecting rib.
The Z-direction mechanism comprises a positioning plate, a linear guide rail C, U-shaped plate and a ball screw C, wherein the positioning plate is of a U-shaped structure, a linear guide rail C is arranged on a U-shaped arm of the positioning plate, and the U-shaped plate is matched with the linear guide rail C through a guide rail seat; the U-shaped plate is provided with a ribbed plate, the ribbed plate is matched with a ball screw C arranged on the positioning plate through a nut seat C, and the ball screw C is driven to rotate through a stepping motor C to drive the U-shaped plate to move back and forth along a linear guide rail C; the rib plates and the moving plate are fixed with each other.
The two U-shaped arms of the positioning plate are respectively provided with a linear guide rail C, the upper end surface of the positioning plate is provided with a fixed plate C, the fixed plate C is provided with a fixed seat C and a motor transmission seat C, a ball screw C is arranged between the fixed seat C and the motor transmission seat C, and the ball screw C is connected with a stepping motor C arranged on the fixed plate C through a coupler; and the nut seat C matched with the ball screw C is connected with a ribbed plate on two sides of the U-shaped plate.
The spindle integrated structure comprises a spindle motor, a spindle, a bevel gear and a cutter, wherein the spindle motor is connected with the spindle through a coupler, the bevel gear is machined at the tail end of the spindle, and the cutter is connected with the bevel gear.
The spindle motor is arranged on a connecting plate at the uppermost end of the Y-direction mechanism through a fixing plate, the spindle penetrates through a central hole of the connecting plate at the upper end of the Y-direction mechanism and is arranged in a spindle box shell, and the tail end of the spindle is positioned at the lowermost end of the spindle box and is connected with a cutter outside the spindle box.
And position sensors are arranged on the X-direction mechanism, the Y-direction mechanism and the Z-direction mechanism and used for overtravel alarming.
The invention has the following remarkable effects: the automatic cutting device for the online repair of the valve seat sealing ring of the nuclear-grade gate valve can realize the accurate positioning and full-automatic cutting of the cutting device in the X, Y, Z direction; all parts are connected through bolts, so that the device is convenient to disassemble and assemble, parts such as a cutter and the like can be replaced and adjusted according to valves with different calibers and different sizes, the device has high applicability, and is suitable for cutting valve seat rings of the valves with different calibers; the device is provided with a remote monitoring system and a remote operation system, automatically finishes the cutting work of the valve seat ring, ensures enough processing precision in a high radiation environment, and simultaneously greatly reduces the irradiation dose of personnel.
Drawings
FIG. 1 is a schematic structural diagram of an automatic cutting device for online repairing of a valve seat sealing ring of a nuclear-grade gate valve, according to the present invention;
FIG. 2 is a schematic structural diagram of an X-direction mechanism in the automatic cutting device for on-line repairing of the valve seat sealing ring of the nuclear-grade gate valve according to the present invention;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a schematic structural view of a Y-direction mechanism in the automatic cutting device for online repairing of the valve seat sealing ring of the nuclear-grade gate valve according to the present invention;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a schematic structural view of a Z-direction mechanism in the automatic cutting device for on-line repairing of the valve seat sealing ring of the nuclear-grade gate valve according to the present invention;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is a schematic view of a main shaft integrated structure in the automatic cutting device for on-line repairing of the valve seat sealing ring of the nuclear-grade gate valve according to the present invention;
in the figure: 1. moving the plate; 2. a linear guide rail seat A; 3. connecting blocks; 4. a nut seat A; 5. a ball screw A; 6. fixing a plate A; 7. a fixed seat A; 8. a motor transmission seat A; 9. a stepping motor A; 10. a linear guide rail A; 11. a linear guide rail B; 12. a connecting plate; 13. a linear guide rail seat B; 14. a main spindle box; 15. Connecting ribs; 16. a nut seat B; 17. a ball screw B; 18. a fixing plate B; 19. a fixed seat B; 20. a motor transmission seat B; 21. a stepping motor B; 22. positioning a plate; 23. a linear guide rail C; 24. a U-shaped plate; 25. a guide rail seat; 26. a rib plate; 27. a nut seat C; 28. a ball screw C; 29. a fixing plate C; 30. A fixed seat C; 31. a motor transmission seat C; 32. a stepping motor C; 33. a spindle motor; 34. a fixing plate D; 35. a main shaft; 36. a bevel gear; 37. and (4) a cutter.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, an automatic cutting device for on-line repairing of a valve seat sealing ring of a nuclear-grade gate valve comprises an X-direction mechanism, a Y-direction mechanism, a Z-direction mechanism and a spindle integrated structure, wherein as shown in fig. 2 and 3, the X-direction mechanism comprises a moving plate 1, a linear guide rail seat a2, a ball screw A5, a fixed plate A6, a stepping motor a9 and a linear guide rail a10, the fixed plate A6 is a flat plate structure with a rectangular through hole, two linear guide rails a10 are installed on the back of the fixed plate A6 in an up-down parallel manner, the moving plate 1 is installed on a linear guide rail a10 through a linear guide rail seat a2, so that the moving plate 1 can move left and right along the linear; a fixed seat A7 and a motor transmission seat A8 are installed on two sides of a rectangular through hole in the front of a fixed plate A6, one end of a ball screw A5 installed between the fixed seat A7 and a motor transmission seat 8 is connected with a stepping motor A9 fixed on the fixed plate A6 through a coupler, a nut seat A4 installed on the ball screw A5 in a matching mode, a connecting block 3 fixed on a moving plate 1 penetrates through the rectangular through hole of the fixed plate A6 and is fixedly connected with the nut seat A4, the ball screw A5 is driven through a stepping motor A9, and the nut seat A4 is used for driving the moving plate 1 to move left and right along a linear guide rail A10;
as shown in fig. 4 and 5, the Y-direction mechanism includes a linear guide B11, a headstock 14, a connecting plate 12, a ball screw B17, and a fixed plate B18, wherein two linear guides B11 are vertically installed on the moving plate 1 in the X-direction mechanism, a linear guide seat B13 is installed on the linear guide B11 in a matching manner, and a casing of the headstock 14 is connected with a linear guide seat B13 through the connecting plate 12, so that the headstock 14 can move up and down along the linear guide B11; a fixed plate B18 is arranged on the opposite side of the linear guide rail B11 and is connected with a connecting plate at the upper end of the fixed plate B18 through a linear guide rail B11 to form a fixed frame structure, a fixed seat B19 and a motor transmission seat B20 are respectively arranged at the upper end and the lower end of the fixed plate B18, and a ball screw B17 in the vertical direction is arranged between the fixed plate B18 and the motor transmission seat B20, wherein the upper end of the ball screw B17 is connected with a stepping motor B21 arranged at the upper end of the fixed plate B; a nut seat B16 matched with the ball screw B17 is fixed with the shell at the other side of the main spindle box 14 through a connecting rib 15, and the ball screw B17 can be driven through a stepping motor B21 so as to drive the main spindle box 14 to move up and down along a linear guide rail B11;
as shown in fig. 6 and 7, the Z-direction mechanism includes a positioning plate 22, a linear guide rail C23, a U-shaped plate 24, a ball screw C28, and a stepping motor C32, wherein the positioning plate 22 is U-shaped, and is engaged with the end surface of a flange in the valve and can be fixed to the valve body by a nut; two linear guide rails C23 are arranged on two U-shaped arms of the positioning plate 22, and the U-shaped plate 24 is matched with the linear guide rails C23 through a guide rail seat 25 at the lower end of the U-shaped plate 24, so that the U-shaped plate 24 can move back and forth along the linear guide rails C23; a fixing plate C29 is installed on one side of the upper end face of the positioning plate 22, a fixing seat C30 and a motor transmission seat C31 are installed on the fixing plate C29 in a front-back mode, and a ball screw C28 is installed on a fixing seat C30 and a motor transmission seat C31, wherein one end of the ball screw C28 is connected with a stepping motor C32 installed on the fixing plate C29 through a coupler, a nut seat C27 matched on the ball screw C28 is connected with one ribbed plate 26 in two sides of the U-shaped plate 24, and the ball screw C28 is driven through a stepping motor C32 so as to drive the U-shaped plate 24 to move back and forth along the linear guide rail C23; rib plates 26 on two sides of the U-shaped plate 24 are fixed with two side walls of the moving plate 1 in the X-direction mechanism;
as shown in fig. 8, the spindle integrated structure includes a spindle motor 22, a spindle 35, a bevel gear 36 and a cutter 37, wherein the spindle motor 22 is connected to the spindle 35 through a coupling, the bevel gear 36 is machined at the end of the spindle 35, the cutter 37 is connected to the bevel gear 36 to change the rotation of the spindle 35 in the vertical direction into the rotation in the horizontal direction, and the cutter 37 is a disc-type cutter which is connected to the spindle 35 through a flat key to realize the rotary cutting of the cutter 37; the spindle motor 22 is mounted on the connection plate at the uppermost end of the Y-direction mechanism through a fixing plate 34, the spindle 35 passes through the central hole of the connection plate at the upper end of the Y-direction mechanism and is mounted inside the housing of the headstock 14, and the tail end of the spindle 35 is located at the lowermost end of the headstock 14 and is connected with a tool 37 outside the headstock 14. And position sensors are arranged on the X-direction mechanism, the Y-direction mechanism and the Z-direction mechanism and used for over-travel alarm, and meanwhile, the full-automatic cutting of the valve seat ring is realized through the regulation and control of a numerical control system.
The invention relates to an automatic cutting device for on-line repairing of a valve seat sealing ring of a nuclear-grade gate valve, which comprises the following specific working processes: putting the whole device into the valve cavity from the upper part of the valve cavity, and confirming that the cutter is opposite to a valve seat ring needing to be cut; the end face of the middle flange at the upper part of the valve cavity is taken as a contact face, and a positioning plate of the device is fully attached to the end face of the middle flange of the valve; the positioning plate is fixedly connected with the end face of the flange by utilizing bolts and nuts; the installer is far away from the on-site valve to carry out remote operation control, and the relative position of the cutter and the valve seat ring is observed through a camera monitoring system; the cutting device is electrified, each motor runs, the cutter is controlled to run to the visual central position of the valve seat ring in a manual mode, then the cutter touches the surface of the inner ring of the valve seat ring, X, Y points are respectively taken in the diameter direction, data are collected, and the center of the valve seat ring is determined; inputting data into a preset certain program, and executing the program to enable the cutter to move to the center of the valve seat ring; adjusting the Z-axis position, and observing a display screen of the numerical control cabinet to enable the cutter to reach the preset Z-axis position; at the moment, the positions in the X/Y/Z directions are set and finished, and a complete cutting program is executed; during the cutting process, a camera monitoring system is used for monitoring in real time, the cutting situation, the data displayed on a display screen and the groove machining situation are carefully observed, and if the machine fails, the machine is paused and adjusted in time; otherwise, until the cutting is finally completed.
Claims (10)
1. The utility model provides a be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line which characterized in that: the device comprises an X-direction mechanism, a Y-direction mechanism, a Z-direction mechanism and a main shaft integrated structure, wherein the main shaft integrated structure can control a cutter (37) at the lower end of the main shaft integrated structure to perform rotary cutting, and the main shaft integrated structure is arranged on the Y-direction mechanism to enable the cutter (37) to move up and down in the vertical Y direction; the Y-direction mechanism is connected with a moving plate (1) in the X-direction mechanism, and the moving plate (1) can move left and right in the X direction relative to a fixed plate A (6) of the X-direction mechanism; the Z-direction mechanism is connected with the X-direction mechanism moving plate (1), and the Z-direction mechanism can realize the front and back movement in the Z direction.
2. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 1, is characterized in that: the X-direction mechanism comprises a moving plate (1), a linear guide rail A (10), a ball screw A (5) and a fixed plate A (6), the linear guide rail A (10) is arranged on the fixed plate A (6), the moving plate (1) is installed on the linear guide rail A (10) through a linear guide rail seat A (2), the ball screw A (5) installed on the fixed plate A (6) can drive a nut seat A (4) connected with the moving plate (1), and the moving plate (1) can move left and right relative to the fixed plate A (6).
3. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 2, wherein: the fixing plate A (6) is of a flat plate structure provided with a rectangular through hole, and two linear guide rails A (10) are arranged on the back of the fixing plate A (6); the front surface of the fixing plate A (6) is provided with a fixed seat A (7) and a motor transmission seat A (8), a ball screw A (5) is arranged between the fixed seat A and the motor transmission seat A, and the rolling screw A (5) is connected with a stepping motor A (9) arranged on the fixing plate A (6) through a coupler; a nut seat A (4) is arranged on the ball screw A (5), and a connecting block (3) fixed on the moving plate (1) penetrates through a through hole of the fixed plate A (6) and is fixedly connected with the nut seat A (4).
4. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 1, is characterized in that: the Y-direction mechanism comprises a linear guide rail B (11), a main spindle box (14), a ball screw B (17) and a fixing plate B (18), the linear guide rail B (11) is vertically fixed on the moving plate (1), and the main spindle box (14) is connected with a linear guide rail seat B (13) matched with the linear guide rail B (11); the fixed plate B (18) and the linear guide rail B (11) are relatively fixed, the spindle box (14) is matched with a ball screw B (17) installed on the fixed plate B (18) through a motor transmission seat B (20), the stepping motor B (21) and the fixed plate B (18) are relatively fixed, the ball screw B (17) is driven to rotate through the stepping motor B (21), and therefore the spindle box (14) is driven to move up and down along the linear guide rail B (11).
5. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 4, wherein: the linear guide rail B (11) comprises two linear guide rails which are parallel to each other, and a shell of the spindle box (14) is connected with a linear guide rail seat B (13) on the linear guide rail B (11) through a connecting plate (12); a fixing plate B (18) is arranged opposite to the linear guide rail B (11), the upper ends of the fixing plate B and the fixing plate B are connected and fixed through a connecting plate to form a frame structure, a fixing seat B (19) and a motor transmission seat B (20) are arranged on the fixing plate B (18), a ball screw B (17) is arranged between the fixing plate B and the motor transmission seat B, and the ball screw B (17) is connected with a stepping motor B (21) arranged on the fixing plate B (18) through a coupler; a nut seat B (16) matched with the ball screw B (17) is fixed with the shell of the main spindle box (14) through a connecting rib (15).
6. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 1, is characterized in that: the Z-direction mechanism comprises a positioning plate (22), a linear guide rail C (23), a U-shaped plate (24) and a ball screw C (28), wherein the positioning plate (22) is of a U-shaped structure, the linear guide rail C (23) is arranged on a U-shaped arm of the positioning plate, and the U-shaped plate (24) is matched with the linear guide rail C (23) through a guide rail seat (25); a ribbed plate is arranged on the U-shaped plate, the ribbed plate is matched with a ball screw C (28) arranged on the positioning plate (22) through a nut seat C (27), and the ball screw C (28) is driven to rotate through a stepping motor C (32) to drive the U-shaped plate to move back and forth along a linear guide rail C (23); the ribbed plates and the moving plate (1) are fixed with each other.
7. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 6, wherein: two U-shaped arms of the positioning plate (22) are respectively provided with a linear guide rail C (23), the upper end surface of the positioning plate (22) is provided with a fixing plate C (29), the fixing plate C (29) is provided with a fixing seat C (30) and a motor transmission seat C (31), a ball screw C (28) is arranged between the fixing seat C (29) and the fixing seat C (29), and the ball screw C (28) is connected with a stepping motor C (32) arranged on the fixing plate C (29) through a coupler; and a nut seat C (27) matched with the ball screw C (28) is connected with a ribbed plate (26) at two sides of the U-shaped plate (24).
8. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 1, is characterized in that: the spindle integrated structure comprises a spindle motor (33), a spindle (35), a bevel gear (36) and a cutter (37), wherein the spindle motor (33) is connected with the spindle (35) through a coupler, the bevel gear (36) is machined at the tail end of the spindle (35), and the cutter (37) is connected with the bevel gear (36).
9. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 8, wherein: the spindle motor (33) is mounted on a connecting plate at the uppermost end of the Y-direction mechanism through a fixing plate (34), the spindle (35) penetrates through a central hole of the connecting plate at the upper end of the Y-direction mechanism and is mounted inside a shell of the spindle box (14), and the tail end of the spindle (35) is located at the lowermost end of the spindle box (14) and is connected with a cutter (37) outside the spindle box (14).
10. The automatic cutting device for the on-line repair of the valve seat sealing ring of the nuclear-grade gate valve according to claim 1, is characterized in that: and position sensors are arranged on the X-direction mechanism, the Y-direction mechanism and the Z-direction mechanism and used for overtravel alarming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921942792.9U CN211304961U (en) | 2019-11-12 | 2019-11-12 | Be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921942792.9U CN211304961U (en) | 2019-11-12 | 2019-11-12 | Be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line |
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| CN211304961U true CN211304961U (en) | 2020-08-21 |
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| CN201921942792.9U Active CN211304961U (en) | 2019-11-12 | 2019-11-12 | Be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814410A (en) * | 2019-11-12 | 2020-02-21 | 中核核电运行管理有限公司 | Be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line |
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2019
- 2019-11-12 CN CN201921942792.9U patent/CN211304961U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814410A (en) * | 2019-11-12 | 2020-02-21 | 中核核电运行管理有限公司 | Be used for nuclear level gate valve disk seat sealing ring to restore automatic cutout device on line |
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