CN115978278B - Novel cylinder type actuator for nuclear power regulating valve - Google Patents
Novel cylinder type actuator for nuclear power regulating valve Download PDFInfo
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- CN115978278B CN115978278B CN202211541780.1A CN202211541780A CN115978278B CN 115978278 B CN115978278 B CN 115978278B CN 202211541780 A CN202211541780 A CN 202211541780A CN 115978278 B CN115978278 B CN 115978278B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
A novel cylinder type actuator for a nuclear power regulating valve belongs to the technical field of actuators for nuclear power valves. The device comprises a mechanical adjustable limit screw, a spring, a piston, a push rod, a retaining cover, a spring cover assembly, a piston cylinder, a lower end cover and a support assembly, wherein the retaining cover, the spring cover assembly, the piston cylinder, the lower end cover and the support assembly are sequentially arranged from top to bottom, the piston is arranged in the piston cylinder, a lower spring seat is arranged in the piston, the upper end and the lower end of the spring are respectively connected with the spring cover assembly and the lower spring seat, one end of the mechanical adjustable limit screw is in threaded fit with the spring cover assembly, the other end of the mechanical adjustable limit screw is in sliding fit with the lower spring seat, a guide sleeve is sleeved in a bushing through a clamp spring, one end of the push rod is connected with the support assembly, and the other end of the push rod is connected with the piston through a gland. The cylinder type actuator aims to solve the problems that an existing cylinder type actuator is not provided with an adjustable mechanical limiting structure, a spring cover and a piston cylinder are split, and the cost is high, the structure is simple and compact, the height of the cylinder type actuator and the gravity center of complete equipment are effectively reduced, and the stability and the reliability of the equipment are improved.
Description
Technical Field
The invention relates to a novel pneumatic actuator for a nuclear power regulating valve, and belongs to the technical field of actuators for nuclear power valves.
Background
The cylinder actuator is used as a common control part of the regulating valve and is widely applied to the field of nuclear power valves, such as a nuclear power unit turbine bypass system turbine bypass regulating valve, a main water supply regulating valve and the like. In order to meet the requirements of different maximum flow restrictions of the same regulating valve, the valve needs to be provided with an air cylinder actuator with an adjustable mechanical limiting structure to meet the requirements; meanwhile, the field device is limited in installation and maintenance space, and the height of the cylinder actuator is also particularly important to be effectively reduced. The conventional single-acting cylinder type actuator with the same cylinder diameter is not provided with an adjustable mechanical limiting structure, and the spring cover is split with the piston cylinder and is connected with the piston cylinder through a long bolt, so that the device is too high and heavy, the cost is increased, and the resource waste is caused.
Therefore, it is needed to provide a cylinder type actuator with an adjustable mechanical limit structure for effectively reducing the height so as to solve the above-mentioned technical problems.
Disclosure of Invention
The present invention has been developed to solve the problems of the existing cylinder type actuator that the adjustable mechanical limit structure is not provided, and the spring housing is separated from the piston cylinder, and the spring housing is connected with the piston cylinder through a long bolt, so that the device is too high and heavy, the cost is increased, and the resource is wasted. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the invention is as follows:
the utility model provides a novel cylinder formula executor for nuclear power governing valve, including spring housing subassembly, stop nut, mechanically adjustable stop screw, the spring, lower spring holder, the piston cylinder, a piston, the gland, the lower end cover, the bush, the uide bushing, the push rod, support subassembly, jump ring and fender lid, the lower end cover is installed at the top of support subassembly, the piston cylinder is equipped with to the top cover of lower end cover, piston cylinder top cover is equipped with the spring housing subassembly, install the fender lid in the top tang of spring housing subassembly, install the piston in the piston cylinder, the lower spring holder is installed at the piston top, spring bottom suit is outside the lower spring holder, spring top and spring housing subassembly establish to be connected, mechanically adjustable stop screw one end passes through stop nut and spring housing subassembly screw thread fit, the other end is visited down inside the spring holder, and sliding fit with it, the uide bushing passes through the fixed suit of jump ring is inside the lower end cover, push rod one end is established with support subassembly and is connected, the push rod other end passes behind the uide bushing and establishes with the piston, be provided with the air outlet on the spring housing subassembly, be provided with the air inlet on the lower end cover.
Further: the circumferential annular groove above the push rod is sleeved with a clamping ring, and the upper end surface of the clamping ring is tightly attached to the lower end surface of the gland.
Further: the lower end cover is provided with a transverse oil filling hole, an oil cup is mounted on the oil filling hole in a threaded fit mode, and the outer side wall of the lower end cover is in sealing connection with the inner side wall of the piston cylinder through a third O-shaped ring.
Further: the guide sleeve is provided with a transverse oil filling hole, the outer side wall of the guide sleeve above the oil filling hole is in sealing connection with the inner side wall of the bushing through a rubber sealing ring, the outer side wall of the guide sleeve below the oil filling hole is in sealing connection with the inner side wall of the bushing through a first O-shaped ring, and the inner side wall of the guide sleeve is in sealing connection with the outer side wall of the push rod through a dustproof sealing ring.
Further: the oil filling hole is formed in the bushing, the outer side wall of the top of the oil filling hole is in sealing connection with the inner side wall of the lower end cover through the second O-shaped ring, and the oil filling hole in the lower end cover, the oil filling hole in the bushing and the oil filling hole in the guide sleeve are sequentially communicated.
Further: the piston adopts circumference ladder type structure, and the lateral wall is equipped with two upper and lower annular grooves, and two upper and lower annular grooves are equipped with circumference guiding band and fourth O type circle respectively, the piston inside wall passes through fifth O type circle and establishes sealing connection with the push rod lateral wall.
Further: the spring cover assembly comprises a spring cover, a spring cylinder, an upper end cover and a hanging ring, wherein the spring cover and the upper end cover are respectively fixedly installed at the upper end and the lower end of the spring cylinder, the hanging ring is installed on the side wall of the spring cylinder, a threaded through hole is formed in the middle of the spring cover, the upper end cover is in a hollow form, the diameter of the inner wall of the upper end cover is the same as that of the inner wall of the spring cylinder, and an air outlet is formed in the circumferential direction of the upper end cover.
Further: the upper part of the mechanical adjustable limit screw is a threaded section, the lower part of the mechanical adjustable limit screw is a light column section, and the bottom end face of the mechanical adjustable limit screw is of a hexagonal head structure.
The invention has the following beneficial effects:
1. the invention provides a novel cylinder actuator for a nuclear power regulating valve, which has a simple and compact structure, and a spring cover simultaneously has the functions of an upper end cover and an upper spring seat of a spring cover, so that a conventional spring cover base is removed, an assembly is formed by the spring cover, the spring cylinder and the upper end cover, the conventional spring cover base is removed, the upper end cover is changed into a hollow form from a closed type, a lower spring seat is directly arranged in an annular groove at the upper end of a piston, the height of the pneumatic actuator and the gravity center of complete equipment are effectively reduced under the condition that the cylinder diameter and the spring length are unchanged, and the stability and the reliability of the equipment are improved;
2. the invention has the function of mechanically limiting by adjusting the mechanically adjustable limiting screw according to the actual valve position requirement under the condition of not changing the compression amount of the spring;
3. according to the invention, the spring is compressed and pre-tensioned in advance by adjusting the mechanically adjustable limit bolt in the installation process, so that the spring cover assembly, the spring and the lower spring seat are assembled as a whole, the installation is convenient, compared with the method of directly screwing the stud to compress the spring to a large extent to realize the fixation of the spring cover, the piston cylinder and the lower end cover, the operation force is reduced, the spring is not easy to bias, and the safety is improved;
drawings
FIG. 1 is a schematic diagram of a novel cylinder actuator for a nuclear power regulating valve;
FIG. 2 is a schematic view of the spring case assembly of the present invention;
FIG. 3 is a top view of the spring case assembly of the present invention;
in the figure, the spring cover assembly comprises a 1-1-spring cover, a 1-2-spring cylinder, a 1-3-upper end cover, a 1-4-hanging ring, a 2-limit nut, a 3-mechanically adjustable limit screw, a 4-spring, a 5-lower spring seat, a 6-piston cylinder, a 7-piston, an 8-gland, a 9-oil cup, a 10-lower end cover, a 11-clamping ring, a 12-bushing, a 13-guide sleeve, a 14-push rod, a 15-bracket assembly, a 16-dustproof sealing ring, a 17-first O-shaped ring, a 18-rubber sealing ring, a 19-second O-shaped ring, a 20-stud, a 21-third O-shaped ring, a 22-fourth O-shaped ring, a 23-circumferential guide belt, a 24-clamping spring, a 25-fifth O-shaped ring and a 26-blocking cover.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The connection mentioned in the invention is divided into a fixed connection and a detachable connection, wherein the fixed connection is a conventional fixed connection mode such as a non-detachable connection including but not limited to a hemmed connection, a rivet connection, an adhesive connection, a welded connection and the like, the detachable connection is a conventional detachable mode such as a threaded connection, a snap connection, a pin connection, a hinge connection and the like, and when a specific connection mode is not limited explicitly, at least one connection mode can be found in the conventional connection mode by default, so that the function can be realized, and a person skilled in the art can select the device according to needs. For example: the fixed connection is welded connection, and the detachable connection is hinged connection.
The first embodiment is as follows: 1-3, the novel cylinder type actuator for the nuclear power regulating valve of the embodiment comprises a spring cover assembly 1, a limit nut 2, a mechanically adjustable limit screw 3, a spring 4, a lower spring seat 5, a piston cylinder 6, a piston 7, a gland 8, a lower end cover 10, a bushing 12, a guide sleeve 13, a push rod 14, a bracket assembly 15, a clamp spring 24 and a blocking cover 26;
the top of the bracket assembly 15 is provided with a lower end cover 10, the outer side wall of the top of the lower end cover 10 is in sealing connection with the inner side wall of the piston cylinder 6 through a third O-shaped ring 21, the top of the piston cylinder 6 is sleeved with a spring cover assembly 1, and a baffle cover 26 is arranged in a top spigot of the spring cover assembly 1;
a piston 7 is arranged in the piston cylinder 6, a lower spring seat 5 is arranged at the top of the piston 7, the bottom of the spring 4 is sleeved outside the lower spring seat 5, the top of the spring 4 is connected with the spring cover assembly 1, and according to actual valve position requirements, the distance from the lower end face of the mechanically adjustable limit screw 3 to the upper end face of the push rod 14 is controlled by adjusting the limit nut 2, so that the function of adjustable mechanical limit is realized; in the installation, the spring 4 is compressed and pre-tightened in advance by adjusting the mechanical adjustable limit screw 3, and the spring 4 is further compressed by tightening the stud 20, so that the spring cover assembly 1, the spring 4 and the lower spring seat 5 are assembled as a whole, the installation is convenient, the fixing of the spring cover 1, the piston cylinder 6 and the lower end cover 10 is realized by greatly compressing the spring 4 compared with the fixing of directly tightening the stud 20, the operation force is reduced, the spring 4 is not easy to be biased, and the safety is improved.
One end of a mechanical adjustable limit screw 3 is in threaded fit with a spring cover assembly 1 through a limit nut 2, the distance from the lower end face of the mechanical adjustable limit screw 3 to the upper end face of a push rod 14 is shortened through the limit nut 2, compression and pre-tightening of a spring 4 are achieved, the other end of the mechanical adjustable limit screw 3 extends into a lower spring seat 5 and is in sliding fit with the lower spring seat 5, a guide sleeve 13 is fixedly sleeved in a bushing 12 through a clamp spring 24, the bushing 12 is sleeved in a lower end cover 10, transverse oil holes are formed in the lower end cover 10, the guide sleeve 13 and the bushing 12, the oil holes in the lower end cover 10, the oil holes in the bushing 12 and the oil holes in the guide sleeve 13 are sequentially communicated, an oil cup 9 is installed on the oil holes in threaded fit with the lower end cover 10, the outer side wall of the top of the oil hole is in sealing connection with the inner side wall of the lower end cover 10 through a second O-shaped ring 19, the outer side wall of the guide sleeve 13 above the oil hole is in sealing connection with the inner side wall of the bushing 12 through a rubber seal ring 18, and the outer side wall of the guide sleeve 13 below the oil hole is in sealing connection with the inner side wall of the bushing 12 through a first O-shaped ring 17;
the retaining cover 26 is made of transparent organic glass, has visibility, belongs to an arched cylindrical thin-wall structure, is detachable, is convenient for adjusting the limit nut 2, has a rainproof function, and prevents the thread sections of the limit nut 2 and the mechanically adjustable limit screw 3 from being rusted, thereby affecting the adjusting performance
One end of a push rod 14 is connected with a bracket assembly 15, the other end of the push rod 14 passes through a guide sleeve 13 and then is connected with a piston 7 through a gland 8, the inner side wall of the guide sleeve 13 is connected with the outer side wall of the push rod 14 in a sealing way through a dustproof sealing ring 16, so that the tightness and the dustproof effect are ensured, a circumferential annular groove above the push rod 14 is sleeved with a clamping ring 11, the upper end surface of the clamping ring 11 is tightly attached to the lower end surface of the gland 8, an air outlet is formed in the spring cover assembly 1, an air inlet is formed in the lower end cover 10, and the air inlet penetrates through the upper end surface of the air inlet through a right-angle bend and is communicated with the interior of a piston cylinder 6;
the piston 7 adopts circumference ladder type structure, and the lateral wall is equipped with two upper and lower annular grooves, and two upper and lower annular grooves are equipped with circumference guiding band 23 and fourth O type circle 22 respectively, the sealing connection is established through fifth O type circle 25 with push rod 14 lateral wall to piston 7 inside wall, guarantees leakproofness and dustproof effect.
The spring cover assembly 1 comprises a spring cover 1-1, a spring cylinder 1-2, an upper end cover 1-3 and hanging rings 1-4, wherein the upper end and the lower end of the spring cylinder 1-2 are fixedly provided with the spring cover 1-1 and the upper end cover 1-3 respectively by welding, 4 hanging rings 1-4 are uniformly distributed on the side wall of the spring cylinder 1-2, the spring cover 1-1 simultaneously has the functions of the upper end cover and an upper spring seat of the spring cover assembly 1, a threaded through hole is formed in the middle of the spring cover 1-1, 4 square hanging rings 1-4 are uniformly distributed on the outer wall of the spring cylinder 1-2, a conventional spring cover base is removed, the upper end cover 1-3 is changed into a hollow form from a closed type, the diameter of the inner wall of the upper end cover 1-3 is kept consistent with that of the inner wall of the spring cylinder 1-2, and an air outlet is circumferentially arranged.
The upper part of the mechanical adjustable limit screw 3 is a threaded section, the lower part is a light column section, and the bottom end face of the mechanical adjustable limit screw 3 is of a hexagonal head structure.
It should be noted that, in the above embodiments, as long as the technical solutions that are not contradictory can be arranged and combined, those skilled in the art can exhaust all the possibilities according to the mathematical knowledge of the arrangement and combination, so the present invention does not describe the technical solutions after the arrangement and combination one by one, but should be understood that the technical solutions after the arrangement and combination have been disclosed by the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. Novel cylinder type actuator for nuclear power governing valve, its characterized in that: comprises a spring cover assembly (1), a limit nut (2), a mechanical adjustable limit screw (3), a spring (4), a lower spring seat (5), a piston cylinder (6), a piston (7), a gland (8), a lower end cover (10), a bushing (12), a guide sleeve (13), a push rod (14), a bracket assembly (15), a clamp spring (24) and a baffle cover (26), wherein the lower end cover (10) is installed at the top of the bracket assembly (15), the piston cylinder (6) is sleeved at the top of the lower end cover (10), the spring cover assembly (1) is sleeved at the top of the piston cylinder (6), the baffle cover (26) is installed in a top spigot of the spring cover assembly (1), the piston (7) is internally provided with a piston (7), the lower spring seat (5) is directly installed at the top of the piston (7), the bottom of the spring (4) is sleeved at the outer side of the lower spring seat (5), the top of the spring (4) is connected with the spring cover assembly (1), one end of the mechanical adjustable limit screw (3) is matched with the spring cover assembly (1) through the limit nut (2) and the other end of the spring cover assembly (1) in a threaded fit, and is downwards matched with the spring seat (5) in a sliding mode, the guide sleeve (13) is fixedly sleeved in the bushing (12) through the clamp spring (24), the bushing (12) is sleeved in the lower end cover (10), one end of the push rod (14) is connected with the bracket assembly (15), the other end of the push rod (14) passes through the guide sleeve (13) and then is connected with the piston (7) through the gland (8), the spring cover assembly (1) is provided with an air outlet, and the lower end cover (10) is provided with an air inlet;
the spring cover assembly (1) comprises a spring cover (1-1), a spring cylinder (1-2), an upper end cover (1-3) and a hanging ring (1-4), wherein the spring cover (1-1) and the upper end cover (1-3) are respectively fixedly arranged at the upper end and the lower end of the spring cylinder (1-2), the hanging ring (1-4) is arranged on the side wall of the spring cylinder (1-2), a threaded through hole is formed in the middle of the spring cover (1-1), the upper end cover (1-3) is in a hollow form, the diameter of the inner wall of the upper end cover (1-3) is the same as that of the inner wall of the spring cylinder (1-2), and an air outlet is formed in the circumferential direction of the upper end cover (1-3);
the adjustable spacing screw of machinery (3) top is the screw thread section, and the below is the light beam section, and adjustable spacing screw of machinery (3) bottom terminal surface is hexagonal head structure, and adjustable spacing screw of machinery (3) one end is through stop nut (2) and spring housing subassembly (1) screw thread fit, shortens the distance of terminal surface to push rod (14) up end under adjustable spacing screw of machinery (3) through stop nut (2), realizes compression, pretension spring (4), and spring holder (5) are inside down is visited to adjustable spacing screw of machinery (3) other end to sliding fit with it.
2. The novel cylinder type actuator for the nuclear power regulating valve according to claim 1, wherein: the circumferential annular groove above the push rod (14) is sleeved with a clamping ring (11), and the upper end surface of the clamping ring (11) is tightly attached to the lower end surface of the gland (8).
3. The novel cylinder type actuator for the nuclear power regulating valve according to claim 2, wherein: the lower end cover (10) is provided with a transverse oil filling hole, an oil cup (9) is arranged on the oil filling hole in a threaded fit mode, and the outer side wall of the lower end cover (10) is in sealing connection with the inner side wall of the piston cylinder (6) through a third O-shaped ring (21).
4. The novel cylinder type actuator for the nuclear power regulating valve according to claim 3, wherein: the guide sleeve (13) is provided with a transverse oil filling hole, the outer side wall of the guide sleeve (13) above the oil filling hole is in sealing connection with the inner side wall of the bushing (12) through a rubber sealing ring (18), the outer side wall of the guide sleeve (13) below the oil filling hole is in sealing connection with the inner side wall of the bushing (12) through a first O-shaped ring (17), and the inner side wall of the guide sleeve (13) is in sealing connection with the outer side wall of the push rod (14) through a dustproof sealing ring (16).
5. The novel cylinder type actuator for the nuclear power regulating valve according to claim 4, wherein: the oil filling hole is machined in the bushing (12), the outer side wall of the top of the oil filling hole of the bushing (12) is in sealing connection with the inner side wall of the lower end cover (10) through a second O-shaped ring (19), and the oil filling hole in the lower end cover (10), the oil filling hole in the bushing (12) and the oil filling hole in the guide sleeve (13) are sequentially communicated.
6. The cylinder type actuator for the novel nuclear power regulating valve according to claim 5, wherein: the piston (7) adopts a circumference stepped structure, an upper annular groove and a lower annular groove are formed in the outer side wall of the piston (7), a circumference guiding belt (23) and a fourth O-shaped ring (22) are respectively arranged in the upper annular groove and the lower annular groove, and the inner side wall of the piston (7) is in sealing connection with the outer side wall of the push rod (14) through a fifth O-shaped ring (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211541780.1A CN115978278B (en) | 2022-12-02 | 2022-12-02 | Novel cylinder type actuator for nuclear power regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211541780.1A CN115978278B (en) | 2022-12-02 | 2022-12-02 | Novel cylinder type actuator for nuclear power regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115978278A CN115978278A (en) | 2023-04-18 |
| CN115978278B true CN115978278B (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211541780.1A Active CN115978278B (en) | 2022-12-02 | 2022-12-02 | Novel cylinder type actuator for nuclear power regulating valve |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900548A (en) * | 2005-07-20 | 2007-01-24 | 威伯科有限合伙公司 | Spring-actuated air-brake cylinder for vehicle brake systems |
| CN205013819U (en) * | 2015-10-12 | 2016-02-03 | 罗普阀业（宜兴）有限公司 | Aluminum alloy craspedodrome journey piston pneumatic actuator |
| CN206221765U (en) * | 2016-12-04 | 2017-06-06 | 重庆永富电线电缆有限公司 | For the pneumatic actuator structure of cable production |
| CN208546591U (en) * | 2018-07-16 | 2019-02-26 | 江苏艾瑞自控科技发展有限公司 | A kind of dedicated turbine pneumatic executing agency of nuclear power |
| CN216867677U (en) * | 2021-12-31 | 2022-07-01 | 温州诺盟科技有限公司 | Adjusting mechanism of pneumatic actuator for valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020194078A1 (en) * | 2019-03-27 | 2020-10-01 | Wabco India Limited | A spring brake actuator for a vehicle, in particular parking or emergency brake actuator for use in a commercial vehicle |
-
2022
- 2022-12-02 CN CN202211541780.1A patent/CN115978278B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900548A (en) * | 2005-07-20 | 2007-01-24 | 威伯科有限合伙公司 | Spring-actuated air-brake cylinder for vehicle brake systems |
| CN205013819U (en) * | 2015-10-12 | 2016-02-03 | 罗普阀业（宜兴）有限公司 | Aluminum alloy craspedodrome journey piston pneumatic actuator |
| CN206221765U (en) * | 2016-12-04 | 2017-06-06 | 重庆永富电线电缆有限公司 | For the pneumatic actuator structure of cable production |
| CN208546591U (en) * | 2018-07-16 | 2019-02-26 | 江苏艾瑞自控科技发展有限公司 | A kind of dedicated turbine pneumatic executing agency of nuclear power |
| CN216867677U (en) * | 2021-12-31 | 2022-07-01 | 温州诺盟科技有限公司 | Adjusting mechanism of pneumatic actuator for valve |
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| Publication number | Publication date |
|---|---|
| CN115978278A (en) | 2023-04-18 |
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