CN214222124U - Precise and small self-operated pressure regulating valve for nuclear power - Google Patents
Precise and small self-operated pressure regulating valve for nuclear power Download PDFInfo
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- CN214222124U CN214222124U CN202120316238.0U CN202120316238U CN214222124U CN 214222124 U CN214222124 U CN 214222124U CN 202120316238 U CN202120316238 U CN 202120316238U CN 214222124 U CN214222124 U CN 214222124U
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- square box
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Abstract
The utility model discloses a smart small self-operated pressure regulating valve that nuclear power was used, including the valve body, the right side top of valve body is provided with the export runner, and the left side of valve body is provided with down the import runner, has seted up same intercommunication round hole between the top inner wall of lower import runner and the bottom inner wall of last export runner, be provided with adjustable self-operated actuating mechanism on the valve body, adjustable self-operated actuating mechanism is equipped with the square box that the bottom set up for the opening including seting up the perforation on last export runner top inner wall in the perforation, and the top of square box extends to the top of valve body. The utility model relates to a rationally, easy and simple to handle, be convenient for realize the purpose of formula of relying on oneself regulation according to the size of medium self flowing pressure automatically regulated control pressure, and be convenient for according to the initial opening pressure of the quick accurate adjustment of actual need, realize the purpose of quick accurate pressure regulating, improve the use accuracy nature, satisfy the user demand, be favorable to the use.
Description
Technical Field
The utility model relates to a self-operated pressure regulating valve technical field especially relates to a smart small self-operated pressure regulating valve that nuclear power was used.
Background
The pipeline laying is compacter in nuclear power, therefore pipeline laying adopts smart small type self-operated pressure regulating valve more in nuclear power, self-operated pressure regulating valve is one kind and need not external energy, utilize by transfer medium self energy as the power supply, introduce actuating mechanism control case position, change the pressure differential and the flow at both ends, make the pressure before the valve (or behind the valve) stable, current self-operated pressure regulating valve generally including the valve rod, the case, the disk seat, valve rod and case are fixed connection, case and disk seat sealing connection, and be provided with spring drive on the valve rod, thereby the valve rod changes the relative position of case and disk seat under spring drive's effect and realizes opening or closing of valve.
Although the existing small-sized self-operated pressure regulating valve for nuclear power can realize the compression and opening of a spring through the impact of a medium on a valve core; however, most of the nuclear power self-operated pressure regulating valves do not have the function of quickly and accurately regulating pressure, so that the initial opening pressure cannot be quickly and accurately regulated conveniently according to actual needs, the accuracy is low, and the use requirements cannot be met, so that the nuclear power self-operated pressure regulating valves are provided for solving the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a small-sized self-operated pressure regulating valve for nuclear power.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a precise and small self-operated pressure regulating valve for nuclear power comprises a valve body, wherein an upper outlet flow passage is arranged at the top of the right side of the valve body, a lower inlet flow passage is arranged at the left side of the valve body, a same communicating circular hole is formed between the inner wall of the top of the lower inlet flow passage and the inner wall of the bottom of the upper outlet flow passage, an adjustable self-operated actuating mechanism is arranged on the valve body and comprises a through hole formed in the inner wall of the top of the upper outlet flow passage, a square box with an opening at the bottom is arranged in the through hole, the top of the square box extends to the upper part of the valve body, a fixed sealing plate is welded on the square box and sleeved with a fixed sealing plate, the fixed sealing plate is fixed at the top of the valve body in a sealing thread manner and matched with the through hole, a first square pipe with a plugging structure at the bottom end is arranged in the square box, and the bottom end of the first square pipe extends into the upper outlet flow passage and is fixedly connected with a round table-shaped rubber plug, the bottom of the truncated cone-shaped rubber plug extends into the communicating circular hole, and the outer side of the truncated cone-shaped rubber plug is in close contact with the inner wall of the communicating circular hole;
the first square tube is fixedly sleeved with a piston plate, the piston plate is sleeved in the square box in a sealing and sliding manner, the square box is slidably sleeved with a square sliding block, and the same spring is fixedly connected between the bottom of the square sliding block and the top of the piston plate, a second square pipe is sleeved in the first square pipe in a sliding manner, the top end of the second square tube is fixedly connected with the bottom of the square sliding block, a screw rod is arranged in the second square tube, the top end of the screw rod extends to the upper part of the square box and is fixedly connected with a knob, the square sliding block is sleeved on the screw rod in a threaded manner, the top part of the left side of the square box is provided with a groove with an opening on the front side and the rear side, and the inner wall of the right side of the groove is fixedly connected with a scale rod, the inner wall of the top of the groove and the inner wall of the top of the square box are both rotatably provided with fixed pulleys, the front side of the scale rod is provided with a balancing weight in a matching way, and the top of the balancing weight is fixedly connected with a soft steel wire rope, and one end of the soft steel wire rope is wound around the tops of the two fixed pulleys and is fixedly connected with the top of the square sliding block.
Preferably, four thread grooves are formed in the top of the valve body, T-shaped bolts are sleeved in the thread grooves, four bolt through holes are formed in the top of the fixed sealing plate, the inner wall of each bolt through hole is in movable contact with the outer side of the corresponding T-shaped bolt, a sealing rubber gasket is fixedly bonded to the bottom of the fixed sealing plate, and the bottom of the sealing rubber gasket is in movable contact with the top of the valve body.
Preferably, the diameter of the top of the truncated cone-shaped rubber plug is larger than that of the bottom of the truncated cone-shaped rubber plug, and the diameter of the top of the truncated cone-shaped rubber plug is smaller than the inner diameter of the through hole.
Preferably, the outside bonding cover of piston plate is equipped with the square sealing washer, and the outside of square sealing washer and the inner wall sliding connection of square box, and the square hole has been seted up at the top of piston plate, and the outside fixed connection of the inner wall of square hole and first square tube.
Preferably, the top of the square sliding block is provided with a threaded hole, the threaded hole is in threaded connection with the screw rod, and the outer side of the screw rod is not in contact with the inner wall of the second square pipe.
Preferably, a first round hole is formed in the inner wall of the top of the square box, a bearing is fixedly sleeved in the first round hole, an inner ring of the bearing is welded and sleeved with the outer side of the screw rod, a second round hole is formed in the inner wall of the left side of the square box, and the soft steel wire rope is located in the second round hole and is not in contact with the inner wall of the second round hole.
Preferably, the rear inner wall of the square box is fixedly connected with a limiting block, and the limiting block is located below the piston plate.
Compared with the prior art, the beneficial effects of the utility model are that:
through the valve body, the lower inlet flow passage, the upper outlet flow passage, the communicating circular hole, the perforation, the square box, the fixed sealing plate, the first square pipe, the piston plate, the truncated cone-shaped rubber plug, the square slide block, the second square pipe, the spring, the screw, the knob, the groove, the scale rod, the fixed pulley, the soft steel wire rope and the counterweight block, the medium enters from the lower inlet flow passage and flows out from the upper outlet flow passage, the medium enters into the communicating circular hole after entering into the lower inlet flow passage and is extruded upwards against the truncated cone-shaped rubber plug, under the extrusion force, the truncated cone-shaped rubber plug moves upwards and is separated from the communicating circular hole, the truncated cone-shaped rubber plug drives the piston plate to compress the spring upwards through the first square pipe, the medium enters into the upper outlet flow passage to flow out, when the pressure of the medium is reduced, the elasticity of the spring in the compression state drives the truncated cone-shaped rubber plug to move back downwards through the piston plate and the first square pipe, at the moment, the separation gap between the truncated cone-shaped rubber plug and the communication circular hole is reduced, so that the flow rate of the medium is changed, and after the pressure of the medium disappears, the spring in a compressed state continuously drives the truncated cone-shaped rubber plug to be downwards inserted into the communication circular hole to realize plugging, so that the purpose of automatically adjusting and controlling the pressure is realized;
when needing to adjust initial opening pressure, the knob is rotated to the forward direction and drives the screw rod and rotate, the screw rod is rotated and can be driven the square slider and move down, the square slider drives the second side pipe and slides down and compress the spring in the first side pipe, the square slider drives the balancing weight through soft wire rope and moves up, the scale mark position that the balancing weight corresponds on the scale pole this moment changes, can adjust the initial compression degree of spring according to actual need, thereby change the spring and tighten elasticity to the decurrent initial of round platform shape rubber end cap, realize changing the initial pressure when opening, personnel can pass through balancing weight and scale pole cooperation, realize measuring the opening pressure when taking notes different positions, according to realizing measured data, make things convenient for personnel follow-up quick accurate pressure regulating through quick accurate adjustment spring realization.
The utility model relates to a rationally, easy and simple to handle, be convenient for realize the purpose of formula of relying on oneself regulation according to the size of medium self flowing pressure automatically regulated control pressure, and be convenient for according to the initial opening pressure of the quick accurate adjustment of actual need, realize the purpose of quick accurate pressure regulating, improve the use accuracy nature, satisfy the user demand, be favorable to the use.
Drawings
Fig. 1 is a schematic sectional view of a small-sized self-operated pressure regulating valve for nuclear power according to the present invention;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
In the figure: 100 valve body, 101 lower inlet flow channel, 102 upper outlet flow channel, 103 intercommunication round hole, 1 perforation, 2 square boxes, 3 fixed shrouding, 4 first square pipes, 5 piston plates, 6 round platform shape rubber end cap, 7 square sliders, 8 second square pipes, 9 springs, 10 screw rods, 11 knobs, 12 grooves, 13 scale rods, 14 fixed pulleys, 15 soft wire ropes, 16 balancing weights.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-2, a small-sized self-operated pressure regulating valve for nuclear power comprises a valve body 100, an upper outlet flow passage 102 is arranged at the top of the right side of the valve body 100, a lower inlet flow passage 101 is arranged at the left side of the valve body 100, a same communicating circular hole 103 is arranged between the inner wall of the top of the lower inlet flow passage 101 and the inner wall of the bottom of the upper outlet flow passage 102, an adjustable self-operated actuator is arranged on the valve body 100 and comprises a through hole 1 arranged on the inner wall of the top of the upper outlet flow passage 102, a square box 2 with an opening at the bottom is arranged in the through hole 1, the top of the square box 2 extends to the upper part of the valve body 100, a fixed sealing plate 3 is welded and sleeved on the square box 2, the fixed sealing plate 3 is fixed at the top of the valve body 100 by sealing threads, the fixed sealing plate 3 is matched with the through hole 1, a first square pipe 4 with a sealing structure at the bottom end is arranged in the square box 2, the bottom end of the first square tube 4 extends into the upper outlet flow channel 102 and is fixedly connected with a truncated cone-shaped rubber plug 6, the bottom of the truncated cone-shaped rubber plug 6 extends into the communicating circular hole 103, and the outer side of the truncated cone-shaped rubber plug 6 is tightly contacted with the inner wall of the communicating circular hole 103;
a piston plate 5 is fixedly sleeved on a first square tube 4, the piston plate 5 is sleeved in a square box 2 in a sealing and sliding manner, a square slider 7 is sleeved in the square box 2 in the sliding manner, the same spring 9 is fixedly connected between the bottom of the square slider 7 and the top of the piston plate 5, a second square tube 8 is sleeved in the first square tube 4 in the sliding manner, the top end of the second square tube 8 is fixedly connected with the bottom of the square slider 7, a screw rod 10 is arranged in the second square tube 8, the top end of the screw rod 10 extends to the upper part of the square box 2 and is fixedly connected with a knob 11, the square slider 7 is sleeved on the screw rod 10 in a threaded manner, a groove 12 with openings on both the front side and the rear side is arranged at the top of the left side of the square box 2, a scale rod 13 is fixedly connected on the inner wall on the right side of the groove 12, fixed pulleys 14 are rotatably arranged on the inner wall of the top of the groove 12 and the inner wall of the top of the square box 2, a balancing weight is arranged at the front side of the scale rod 13 in a matching manner, and the top fixedly connected with soft wire rope 15 of balancing weight 16, the top of two fixed pulleys 14 and with the top fixed connection of square slider 7 are walked around to soft wire rope 15's one end, the utility model relates to a rationally, easy and simple to handle, be convenient for according to the size of medium self flowing pressure automatically regulated control pressure, realize the purpose of formula of relying on oneself regulation, and be convenient for according to the initial opening pressure of the quick accurate adjustment of actual need, realize the purpose of quick accurate pressure regulating, improve the use accuracy nature, satisfy the user demand, be favorable to the use.
In the utility model, four thread grooves are arranged on the top of the valve body 100, a T-shaped bolt is sleeved in the thread groove, four bolt perforations are arranged on the top of the fixed closing plate 3, the inner wall of the bolt perforations is movably contacted with the outer side of the corresponding T-shaped bolt, a sealing rubber pad is fixedly bonded on the bottom of the fixed closing plate 3, the bottom of the sealing rubber pad is movably contacted with the top of the valve body 100, the top diameter of the truncated cone-shaped rubber plug 6 is larger than the bottom diameter, the top diameter of the truncated cone-shaped rubber plug 6 is smaller than the inner diameter of the perforation 1, a square sealing ring is sleeved on the outer side of the piston plate 5 in a bonding way, the outer side of the square sealing ring is connected with the inner wall of the square box 2 in a sliding way, a square hole is arranged on the top of the piston plate 5, the inner wall of the square hole is fixedly connected with the outer side of the first square pipe 4, a threaded hole is arranged on the top of the square slider 7, and the threaded hole is in threaded connection with the screw rod 10, the outside of screw rod 10 and the inner wall contactless of second side pipe 8, first round hole has been seted up on the top inner wall of square box 2, and fixed cover is equipped with the bearing in the first round hole, the inner circle of bearing and the outside welding suit of screw rod 10, the second round hole has been seted up on the left side inner wall of square box 2, and soft wire rope 15 is located the second round hole and contactless with the inner wall of second round hole, fixedly connected with stopper on the rear side inner wall of square box 2, and the stopper is located piston plate 5's below, the utility model relates to a rationally, easy and simple to handle, be convenient for according to the size of medium self flowing pressure automatically regulated control pressure, realize the purpose of formula of relying on oneself regulation, and be convenient for according to the initial opening pressure of the quick accurate adjustment of actual need, realize the purpose of quick accurate pressure regulating, improve the use accuracy nature, satisfy the user demand, be favorable to the use.
The working principle is as follows: the medium enters from the lower inlet flow passage 101 and flows out from the upper outlet flow passage 102, when the medium enters into the lower inlet flow passage 101, the medium immediately enters into the communicating circular hole 103 and upwards extrudes the circular table-shaped rubber plug 6, under the extrusion force, the circular table-shaped rubber plug 6 moves upwards and is separated from the communicating circular hole 103, the plugging is removed, at the moment, the circular table-shaped rubber plug 6 drives the first square pipe 4 to slide upwards on the second square pipe 8, the first square pipe 4 drives the piston plate 5 to compress the spring 9 upwards, the purpose of automatically realizing the compression opening of the spring 9 by the medium flow pressure is realized, at the moment, the medium enters into the upper outlet flow passage 102 to flow out, when the medium pressure is reduced and is smaller than the tightening elastic force generated when the spring 9 is compressed, the elastic force of the spring 9 in the compression state at the moment drives the piston plate 5 to move back downwards, the piston plate 5 drives the circular table-shaped rubber plug 6 to move back downwards through the first square pipe 4, at the moment, the separation gap between the truncated cone-shaped rubber plug 6 and the communication circular hole 103 is reduced, so that the flow rate of the medium is changed, after the pressure of the medium disappears, the spring 9 in a compressed state continues to drive the piston plate 5 to move downwards, the piston plate 5 drives the truncated cone-shaped rubber plug 6 to be downwards inserted into the communication circular hole 103 through the first square pipe 4 to realize plugging, and the size of the control pressure can be automatically adjusted according to the flowing pressure of the medium;
when the initial opening pressure of the truncated cone-shaped rubber plug 6 needs to be adjusted according to actual needs, the forward rotation knob 11 drives the screw rod 10 to rotate, under the action of a threaded hole formed in the square slider 7, the screw rod 10 rotates to drive the square slider 7 to move downwards, the square slider 7 drives the second square pipe 8 to slide downwards in the first square pipe 4, the square slider 7 compresses the spring 9 downwards, the square slider 7 drives the soft steel wire rope 15 to slide on the tops of the two fixed pulleys 14, the soft steel wire rope 15 drives the counterweight block 16 to move upwards, the position of the counterweight block 16 corresponding to a scale mark on the scale rod 13 changes, the initial compression degree of the spring 9 can be adjusted according to actual needs, so that the downward initial tightening elastic force of the spring 9 on the truncated cone-shaped rubber plug 6 is changed, and the upward pushing opening of the truncated cone-shaped rubber plug 6 can be realized only when the pressure of a medium is increased, thereby realize changing the initial pressure when round platform shape rubber end cap 6 upwards opens, when personnel can measure in advance and take notes the scale mark position of difference on 16 alignment scale poles 13 of balancing weight, pressure when round platform shape rubber end cap 6 is opened by the medium extrusion, thereby under scale poles 13 and balancing weight 16's cooperation, make things convenient for the elasticity of the follow-up quick accurate adjustment spring 9 of personnel, thereby make things convenient for personnel to open pressure according to the initial pressure of the quick accurate adjustment of actual need, realize the purpose of quick accurate pressure regulating.
In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A nuclear power used precise and small self-operated pressure regulating valve comprises a valve body (100), wherein an upper outlet flow passage (102) is arranged at the top of the right side of the valve body (100), a lower inlet flow passage (101) is arranged at the left side of the valve body (100), a same communicating round hole (103) is arranged between the inner wall of the top of the lower inlet flow passage (101) and the inner wall of the bottom of the upper outlet flow passage (102), the nuclear power used precise and small self-operated pressure regulating valve is characterized in that an adjustable self-operated actuating mechanism is arranged on the valve body (100) and comprises a through hole (1) arranged on the inner wall of the top of the upper outlet flow passage (102), a square box (2) with an opening at the bottom is arranged in the through hole (1), the top of the square box (2) extends to the upper part of the valve body (100), a fixed sealing plate (3) is welded and sleeved on the square box (2), and the fixed sealing plate (3) is fixed at the top of the valve body (100) through sealing threads, the fixed sealing plate (3) is matched with the through hole (1), a first square pipe (4) with a bottom end of a blocking structure is arranged in the square box (2), the bottom end of the first square pipe (4) extends into the upper outlet flow channel (102) and is fixedly connected with a circular truncated cone-shaped rubber plug (6), the bottom of the circular truncated cone-shaped rubber plug (6) extends into the communicating circular hole (103), and the outer side of the circular truncated cone-shaped rubber plug (6) is in close contact with the inner wall of the communicating circular hole (103);
the square box is characterized in that a piston plate (5) is fixedly sleeved on a first square pipe (4), the piston plate (5) is sleeved in a square box (2) in a sealing and sliding manner, a square sliding block (7) is sleeved in the square box (2) in a sliding manner, a same spring (9) is fixedly connected between the bottom of the square sliding block (7) and the top of the piston plate (5), a second square pipe (8) is sleeved in the first square pipe (4) in the sliding manner, the top end of the second square pipe (8) is fixedly connected with the bottom of the square sliding block (7), a screw rod (10) is arranged in the second square pipe (8), the top end of the screw rod (10) extends to the upper part of the square box (2) and is fixedly connected with a knob (11), the square sliding block (7) is sleeved on the screw rod (10) in a threaded manner, a groove (12) with which is provided with openings at the front side and the rear side is arranged at the top of the left side of the square box (2), and a scale rod (13) is fixedly connected to the inner wall of the right side of the groove (12), fixed pulleys (14) are rotatably mounted on the inner wall of the top of the groove (12) and the inner wall of the top of the square box (2), a balancing weight (16) is arranged on the front side of the scale rod (13) in a matched mode, a soft steel wire rope (15) is fixedly connected to the top of the balancing weight (16), and one end of the soft steel wire rope (15) bypasses the tops of the two fixed pulleys (14) and is fixedly connected with the top of the square sliding block (7).
2. The nuclear power fine self-operated pressure regulating valve according to claim 1, wherein the top of the valve body (100) is provided with four thread grooves, T-shaped bolts are sleeved in the thread grooves, the top of the fixed sealing plate (3) is provided with four bolt through holes, inner walls of the bolt through holes are in movable contact with the outer sides of the corresponding T-shaped bolts, the bottom of the fixed sealing plate (3) is fixedly bonded with a sealing rubber gasket, and the bottom of the sealing rubber gasket is in movable contact with the top of the valve body (100).
3. The nuclear power fine self-operated pressure regulating valve according to claim 1, wherein the diameter of the top of the truncated cone-shaped rubber plug (6) is larger than that of the bottom of the truncated cone-shaped rubber plug, and the diameter of the top of the truncated cone-shaped rubber plug (6) is smaller than the inner diameter of the through hole (1).
4. The nuclear power fine self-operated pressure regulating valve as claimed in claim 1, wherein a square sealing ring is bonded and sleeved on the outer side of the piston plate (5), the outer side of the square sealing ring is slidably connected with the inner wall of the square box (2), a square hole is formed in the top of the piston plate (5), and the inner wall of the square hole is fixedly connected with the outer side of the first square pipe (4).
5. The nuclear power fine self-operated pressure regulating valve according to claim 1, wherein a threaded hole is formed in the top of the square sliding block (7), the threaded hole is in threaded connection with the screw rod (10), and the outer side of the screw rod (10) is not in contact with the inner wall of the second square pipe (8).
6. The nuclear power fine self-operated pressure regulating valve as claimed in claim 1, wherein a first circular hole is formed in the inner wall of the top of the square box (2), a bearing is fixedly sleeved in the first circular hole, an inner ring of the bearing is welded and sleeved with the outer side of the screw rod (10), a second circular hole is formed in the inner wall of the left side of the square box (2), and the soft steel wire rope (15) is located in the second circular hole and is not in contact with the inner wall of the second circular hole.
7. The nuclear power fine self-operated pressure regulating valve as claimed in claim 1, wherein a limiting block is fixedly connected to the inner wall of the rear side of the square box (2), and the limiting block is located below the piston plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120316238.0U CN214222124U (en) | 2021-02-04 | 2021-02-04 | Precise and small self-operated pressure regulating valve for nuclear power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120316238.0U CN214222124U (en) | 2021-02-04 | 2021-02-04 | Precise and small self-operated pressure regulating valve for nuclear power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214222124U true CN214222124U (en) | 2021-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120316238.0U Expired - Fee Related CN214222124U (en) | 2021-02-04 | 2021-02-04 | Precise and small self-operated pressure regulating valve for nuclear power |
Country Status (1)
| Country | Link |
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| CN (1) | CN214222124U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484280A (en) * | 2022-04-15 | 2022-05-13 | 中国石油化工股份有限公司胜利油田分公司 | Flow regulating device for liquid carbon dioxide distribution |
-
2021
- 2021-02-04 CN CN202120316238.0U patent/CN214222124U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484280A (en) * | 2022-04-15 | 2022-05-13 | 中国石油化工股份有限公司胜利油田分公司 | Flow regulating device for liquid carbon dioxide distribution |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210917 Termination date: 20220204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |