CN219286053U - Clamping tool and clamping structure of tube seat of control rod driving mechanism of nuclear power plant - Google Patents
Clamping tool and clamping structure of tube seat of control rod driving mechanism of nuclear power plant Download PDFInfo
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- CN219286053U CN219286053U CN202320140783.8U CN202320140783U CN219286053U CN 219286053 U CN219286053 U CN 219286053U CN 202320140783 U CN202320140783 U CN 202320140783U CN 219286053 U CN219286053 U CN 219286053U
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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
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to a method comprising the steps of: the piston ring comprises a shell, a plurality of clamping assemblies of the piston ring, a vent pipe and an air source. According to the clamping tool and the clamping structure of the tube seat of the control rod driving mechanism of the nuclear power plant, the air source is used for inflating the air cavity through the vent pipe connected with the air inlet hole, so that the air applies pressure to the annular protruding portion, the piston ring moves upwards, the first inclined surface extrudes the second inclined surface, the clamping assembly is pushed to be close to and clamp the tube seat of the control rod driving mechanism of the nuclear power plant along the radial direction, the air is discharged out of the air cavity through the air inlet hole, the annular protruding portion loses the air pressure, the piston moves downwards, the extrusion of the second inclined surface is relieved by the first inclined surface, and accordingly the tube seat of the control rod driving mechanism of the nuclear power plant is loosened by the clamping assembly. The clamping and loosening of the tube seat of the control rod driving mechanism of the nuclear power plant are realized through a simple and compact structure, so that the effects of reducing the cost and improving the maintenance efficiency are achieved.
Description
Technical Field
The utility model relates to the field of pneumatic clamping tools, in particular to a clamping tool and a clamping structure of a tube seat of a nuclear electric field control rod driving mechanism.
Background
The control rod driving mechanism is a vertical stepping magnetic lifting mechanism arranged on the top cover of the reactor pressure vessel of the nuclear power plant, and when the inside of the tube seat of the control rod driving mechanism is worn, a maintenance tool is required to be fixed on the tube seat of the control rod driving mechanism and is maintained.
In the clamping tool (such as patent document CN 211387450U) of the tube seat of the existing control rod driving mechanism, the driving arm driven to rotate by external force drives the articulated arm and the clamp arm to rotate, so as to drive the lateral compression block arranged at one end of the clamp arm to compress or relax the tube seat of the control rod driving mechanism. Therefore, the existing clamping tool relates to multi-component and multi-directional motion conversion, is complex in mechanical structure, large in mechanism size and high in manufacturing cost, and meanwhile, when the clamping tool is applied to nuclear power sites, the complex mechanical structure can cause the consequences that the clamping tool is difficult to maintain when in failure, and the overhaul period is delayed.
Disclosure of Invention
Based on the above, it is necessary to provide a clamping tool and a clamping structure for the tube seat of the control rod driving mechanism of a nuclear power plant, which aims at the problems of complex mechanical structure, high manufacturing cost, high maintenance difficulty and the like caused by large mechanism volume.
An embodiment of the application provides a centre gripping frock of nuclear power plant control rod actuating mechanism's tube socket, its characterized in that, the centre gripping frock of nuclear power plant control rod actuating mechanism's tube socket includes: a housing, a piston ring, and a plurality of clamping assemblies;
the shell is hollow and cylindrical, the shell is used for being sleeved on a tube seat of the control rod driving mechanism of the nuclear power plant, a containing cavity is formed in the shell, and an air inlet hole is formed in the shell;
the piston ring is positioned in the accommodating cavity and is abutted with the inner wall of the shell so as to form an air cavity communicated with the air inlet hole between the piston ring and the shell, the air cavity is used for allowing air to enter through the air inlet hole and act on the piston ring to push the piston ring to move along the axial direction of the shell, and the inner wall of the piston ring is provided with a first inclined surface which is inclined along the axis of the shell towards the axis far away from the shell;
the clamping assemblies are uniformly distributed along the circumferential direction of the shell, the clamping assemblies are provided with second inclined planes attached to the first inclined planes, and the clamping assemblies are used for moving along the radial direction of the shell under the pushing action of the first inclined planes so as to clamp the tube seat of the control rod driving mechanism of the nuclear power plant.
In one embodiment, the clamping assembly includes a guide portion and a moving portion;
the shell comprises a column body, a top plate and a bottom plate, wherein the top plate and the bottom plate are respectively arranged at two ends of the column body, a first through hole is formed in the top plate, a second through hole is formed in the bottom plate, the first through hole and the second through hole are coaxially arranged, and the inner wall of the first through hole and the inner wall of the second through hole are respectively used for being in butt joint with the outer side wall of a tube seat of the control rod driving mechanism of the nuclear power plant;
the outer wall of the piston ring is provided with an annular protruding part which is abutted with the column body of the shell, the bottom of the piston ring is abutted with the bottom plate, so that an air cavity communicated with the air inlet hole is formed between the piston ring and the shell, and the air inlet hole is formed in the bottom plate;
the guide part is connected with the bottom plate and is provided with a guide shaft extending along the tangential direction of the shell; the inner column body of the moving part is tightly attached to the tube seat of the control rod driving mechanism of the nuclear power plant, the outer column body of the moving part is provided with a second inclined plane attached to the first inclined plane, the moving part is provided with a sliding groove which inclines along the axis of the shell towards the axis far away from the shell, and the guide shaft is in sliding fit with the sliding groove.
In an embodiment, the clamping tool further comprises a plurality of elastic components; the elastic components are in one-to-one correspondence with the clamping components, one end of each elastic component is connected with the corresponding shell, the other end of each elastic component is connected with the corresponding moving part, and the extending direction of each elastic component is the radial direction of the corresponding shell.
In one embodiment, the elastic assembly includes: a first strut, a spring, and a second strut;
one end of the spring is connected with the first support column, and the other end of the spring is connected with the second support column;
one end of the first support column, which is far away from the spring, is connected with one side of the moving part, which is close to the shell;
and one end of the second support column, which is far away from the spring, is connected with the top plate.
In one embodiment, a receiving groove is formed in one side of the moving part, which is close to the shell;
the spring part is positioned in the accommodating groove;
one end of the first support column, which is far away from the spring, is connected with the bottom wall of the accommodating groove.
In an embodiment, the clamping fixture of the tube seat of the control rod driving mechanism of the nuclear power plant further comprises a first sealing ring and a second sealing ring;
the lower end of the inner surface of the cylinder of the shell is provided with a sealing part protruding along the radial direction of the shell, and the sealing part seals a gap between the bottom of the piston ring and the bottom plate;
the first sealing ring is positioned between the annular protruding part and the cylinder;
the second seal ring is located between the piston ring and the seal portion.
In an embodiment, the annular protruding portion is provided with a first sealing groove, the column body is provided with a second sealing groove, and the first sealing ring is located in a first sealing space formed by the first sealing groove and the second sealing groove;
the piston ring is provided with a third sealing groove, the sealing part is provided with a fourth sealing groove, and the second sealing ring is positioned in a second sealing space formed by the third sealing groove and the fourth sealing groove.
In an embodiment, the clamping tool further comprises a plurality of pressing plates and a plurality of connecting rods;
the pressing plate is connected with the top plate through the connecting rod;
two limiting protruding portions are respectively formed on two sides of one end, close to the top plate, of the moving portion along the radial direction of the shell, and the limiting protruding portions are located between the top plate and the pressing plate.
In an embodiment, the top plate is provided with a plurality of moving part grooves, the moving part grooves are in one-to-one correspondence with the moving parts, and the moving parts are provided with two limiting protruding parts, and the portions of the moving parts, which are configured with two limiting protruding parts, are located in the moving part grooves.
The embodiment of the application also provides a clamping structure of the tube seat of the control rod driving mechanism of the nuclear power plant, which is characterized in that the clamping structure of the tube seat of the control rod driving mechanism of the nuclear power plant comprises a vent tube, a gas source and a clamping tool of the tube seat of the control rod driving mechanism of the nuclear power plant;
one end of the vent pipe is connected with the air source, and the other end of the vent pipe is connected with the air inlet hole.
According to the clamping tool and the clamping structure of the tube seat of the control rod driving mechanism of the nuclear power plant, the air source is used for inflating the air cavity through the vent pipe connected with the air inlet hole, so that the air is used for applying pressure to the annular protruding portion, the piston ring moves upwards, the first inclined surface extrudes the second inclined surface, so that the clamping assembly is pushed to be close to and clamp the tube seat of the control rod driving mechanism of the nuclear power plant along the radial direction, the air is discharged out of the air cavity through the air inlet hole, the annular protruding portion loses the air pressure, the piston moves downwards, the first inclined surface releases the extrusion of the second inclined surface, the clamping assembly is used for loosening the tube seat of the control rod driving mechanism of the nuclear power plant, and the clamping assemblies are uniformly distributed along the circumferential direction of the shell, so that the tube seat of the control rod driving mechanism of the nuclear power plant and the clamping tool of the control rod driving mechanism of the nuclear power plant are always coaxial. The clamping and loosening of the tube seat of the control rod driving mechanism of the nuclear power plant are realized through a simple and compact structure, so that the effects of reducing the cost and improving the maintenance efficiency are achieved.
Drawings
FIG. 1 is an exploded view of the structure of a clamping fixture for a stem of a control rod driving mechanism of a nuclear power plant in accordance with one embodiment;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is a schematic view of the structure of a piston ring and clamping assembly of an embodiment;
FIG. 4 is a cross-sectional view of a clamping fixture of a socket of a nuclear power plant control rod drive mechanism of an embodiment mounted to the socket.
Reference numerals:
100-clamping tool of a tube seat of a control rod driving mechanism of a nuclear power plant;
110-a housing; 111-a first through hole; 112-a second through hole; 113-an air inlet; 114-top plate; 1141-a moving part groove; 115-column; 1151-a seal; 1152-a second seal groove; 1153-fourth seal groove; 116-a bottom plate;
120-piston rings; 121-a first incline; 122-annular projections; 1221-a first seal groove; 123-air cavities; 124-a third seal groove; 125-limit grooves;
130-a clamping assembly; 131-a guide; 1311-bump; 132-a moving part; 133-a guide shaft; 134-a second ramp; 135-sliding grooves; 136-limit protrusions;
140-an elastic component; 141-a first leg; 142-springs; 143-a second leg; 144-a receiving slot;
150-a first seal ring;
160-a second seal ring;
170-a pressing plate;
180-plastic gaskets;
190-a vent pipe;
210-stem of a control rod drive mechanism of a nuclear power plant.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means a plurality, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Referring to fig. 1, 2 and 3, an embodiment of the present utility model provides a fixture 100 for clamping a tube socket of a control rod driving mechanism of a nuclear power plant, where the fixture 100 for clamping a tube socket of a control rod driving mechanism of a nuclear power plant includes: a housing 110, a piston ring 120, and a plurality of clamping assemblies 130.
When the clamping tool 100 for the tube seat of the control rod driving mechanism of the nuclear power plant is used, the shell 110 can be sleeved on the tube seat 210 of the control rod driving mechanism of the nuclear power plant due to the fact that the shell 110 is in a hollow cylindrical shape. A receiving chamber (not shown) is formed in the housing 110 such that the piston ring 120 is positioned inside the receiving chamber and abuts against an inner wall of the housing 110, so that an air chamber 123 communicating with the air inlet 113 is formed between the piston ring 120 and the housing 110, and the air chamber 123 is used for allowing air to enter through the air inlet 113 and act on the piston ring 120 to push the piston ring 120 to move in an axial direction of the housing 110.
According to the clamping tool 100 of the tube seat of the control rod driving mechanism of the nuclear power plant, the air cavity 123 is inflated through the air inlet 113 to enable air to act on the piston ring 120, so that the piston ring 120 moves axially, the first inclined surface 121 is attached to the second inclined surface 134, the first inclined surface 121 presses the second inclined surface 134, so that the clamping assembly 130 is pushed to be close to and clamp the tube seat 210 of the control rod driving mechanism of the nuclear power plant in the radial direction, the air cavity 123 is exhausted, the piston ring 120 loses air pressure, the first inclined surface 121 of the piston ring 120 releases the extrusion of the second inclined surface 134, the clamping assembly 130 is enabled to loosen the tube seat 210 of the control rod driving mechanism of the nuclear power plant, the clamping assemblies 130 are evenly distributed along the circumferential direction of the shell 110, and accordingly the piston ring 120 drives the clamping assemblies 130 to move in the radial direction of the shell 110 when moving, and the tube seat 210 of the control rod driving mechanism of the nuclear power plant and the clamping tool of the control rod driving mechanism of the nuclear power plant are always coaxial. The clamping and loosening of the tube seat 210 of the control rod driving mechanism of the nuclear power plant are realized through a simple and compact structure, so that the effects of reducing the cost and improving the maintenance efficiency are achieved.
Specifically, the first inclined surface 121 is inclined in a direction away from the axis of the housing 110 in a direction from the bottom plate 116 to the top plate 114 along the axis of the piston ring.
Referring to fig. 1, 2 and 3, the clamping assembly 130 includes a guiding portion 131 and a moving portion 132, the housing 110 includes a column 115, and a top plate 114 and a bottom plate 116 respectively disposed at two ends of the column 115, so that the clamping assembly 130 is conveniently mounted to the accommodating cavity, the top plate 114 is provided with a first through hole 111, the bottom plate 116 is provided with a second through hole 112, the first through hole 111 and the second through hole 112 are coaxially disposed, and an inner wall of the first through hole 111 and an inner wall of the second through hole 112 are respectively used for abutting with an outer side wall of a tube socket 210 of the nuclear power plant control rod driving mechanism, so that the tube socket 210 of the nuclear power plant control rod driving mechanism passes through the first through hole 111 and the second through hole 112 to be disposed on the tube socket 210 of the nuclear power plant control rod driving mechanism.
The outer wall of the piston ring 120 is provided with an annular protruding part 122 which is abutted against the column body 115 of the shell 110, the bottom of the piston ring 120 is abutted against the bottom plate 116, so that an air cavity 123 communicated with the air inlet hole 113 is formed between the piston ring 120 and the shell 110, the air inlet hole 113 is formed in the bottom plate 116, the guide part 131 is connected with the bottom plate 116, the guide part 131 is provided with a guide shaft 133 which extends tangentially along the radial cross-section circle of the shell 110, the inner side of the moving part 132 is tightly attached to the tube seat 210 of the nuclear power plant control rod driving mechanism, the outer side of the moving part 132 is provided with a second inclined surface 134 which is tightly attached to the first inclined surface 121, the moving part 132 is provided with a sliding groove 135 which is inclined along the axis of the shell 110 towards the axis far away from the shell 110, and the guide shaft 133 is in sliding fit with the sliding groove 135. When the air cavity 123 is inflated, the air acts on the annular protruding portion 122, so that the piston ring 120 moves upwards, the first inclined surface 121 presses the second inclined surface 134, meanwhile, the guide shaft 133 is in sliding fit with the sliding groove 135, so that the moving portion 132 moves downwards relative to the guide portion 131 and moves towards the axis of the housing 110 along the radial direction of the housing 110, the moving portion 132 clamps the outer side of the tube seat 210 of the control rod driving mechanism of the nuclear power plant, and the guide shaft 133 is matched with the sliding groove 135 to limit the moving direction of the moving portion 132. When the air chamber 123 is deflated, the force of the air against the annular protrusion 122 is reduced until it disappears, so that the piston ring 120 moves downward, and the first inclined surface 121 releases the compression of the second inclined surface 134, thereby allowing the moving part 132 to loosen the stem 210 of the control rod driving mechanism of the nuclear power plant.
Specifically, the slide groove 135 is inclined in a direction away from the axis of the housing 110 in a direction from the bottom plate 116 to the top plate 114 along the axis of the housing 110.
Referring to fig. 1 and 2, specifically, a plurality of limiting grooves 125 are formed on an inner wall of the piston ring 120 adjacent to the bottom plate 116, and the plurality of limiting grooves 125 are in one-to-one correspondence with the plurality of clamping assemblies 130. The end of the guide 131 connected to the bottom plate 116 is configured with a boss 1311 in a direction approaching the housing 110 in the radial direction. The protruding block 1311 is located in the limit groove 125 and is tightly attached to the piston ring 120 and the bottom plate 116, so that the space occupied by the guide part 131 is saved, and the structure of the clamping fixture 100 of the tube seat of the control rod driving mechanism of the nuclear power plant is more compact.
Referring to fig. 1, in an embodiment, the clamping tool 100 for the tube socket of the control rod driving mechanism of the nuclear power plant further includes a plurality of elastic assemblies 140, the elastic assemblies 140 are in one-to-one correspondence with the clamping assemblies 130, one end of each elastic assembly 140 is connected to the housing 110, the other end is connected to the moving portion 132, and the elastic assemblies 140 stretch along the radial direction of the housing 110, when the piston rings 120 move upward to press the moving portion 132, so that the moving portion 132 radially clamps the tube socket 210 of the control rod driving mechanism of the nuclear power plant. When the piston ring 120 moves downward, the moving part 132 is loosened, so that the moving part 132 loosens the socket 210 of the nuclear power plant control rod driving mechanism, the elastic assembly 140 is contracted by the elastic force, thereby pulling the moving part 132 connected with the spring 142 assembly to be away from the socket 210 of the nuclear power plant control rod driving mechanism in the radial direction, so that the moving part 132 loosens the socket 210 of the nuclear power plant control rod driving mechanism.
Referring to fig. 1, 2 and 3, in one embodiment, the elastic component 140 includes: first leg 141, spring 142, and second leg 143. One end of the spring 142 is connected with the first pillar 141, the other end is connected with the second pillar 143, one end of the first pillar 141 away from the spring 142 is connected with one side of the moving part 132 close to the shell 110, one end of the second pillar 143 away from the spring 142 is connected with the top plate 114, so that the spring 142 stretching along the radial direction of the shell 110 can be connected with the top plate 114 through the second pillar 143, the connection of the spring 142 in the inner processing of the cylinder 115 is avoided, and when the piston ring 120 moves up and down, the annular protruding part 122 is always in butt joint with the inner part of the cylinder 115, and the sealing effect of the air cavity 123 is ensured.
Referring to fig. 1, 2 and 3, in an embodiment, a receiving groove 144 is formed on a side of the moving portion 132 near the housing 110, one end of the first support column 141, which is far away from the spring 142, is connected to a bottom wall of the receiving groove 144, and the spring 142 is partially located in the receiving groove 144, so that the length and the deformation of the spring 142 are increased, the tension of the spring 142 on the moving portion 132 is increased, and it is ensured that the spring 142 can stably pull the moving portion 132 away from and release the tube socket 210 of the control rod driving mechanism of the nuclear power plant after the piston ring 120 moves downward to release the moving portion 132.
Referring to fig. 1 and 4, in an embodiment, the clamping fixture 100 for the tube socket of the driving mechanism of the control rod of the nuclear power plant further includes a first sealing ring 150 and a second sealing ring 160, a sealing portion 1151 protruding radially along the housing 110 is disposed at the lower end of the inner surface of the cylinder 115, and the sealing portion 1151 seals a gap between the bottom of the piston ring 120 and the bottom plate 116, so that the air pressure in the air cavity 123 after inflation can be ensured, the pressure stability of the air received by the piston ring 120 is ensured, and the pressure of the piston ring 120 to the moving portion 132 is ensured, and the moving portion 132 is ensured to be capable of stably clamping the tube socket 210 of the driving mechanism of the control rod of the nuclear power plant.
The first sealing ring 150 is located between the annular protruding portion 122 and the column 115, and is used for sealing a gap between the annular protruding portion 122 and the column 115, the second sealing ring 160 is located between the piston ring 120 and the sealing portion 1151, and is used for sealing a gap between the piston ring 120 and the sealing portion 1151, so that air pressure in the inflated air cavity 123 can be ensured, and pressure of air received by the piston ring 120 is ensured, so that pressure of the piston ring 120 to the moving portion 132 is ensured, and further the moving portion 132 can be ensured to stably clamp the tube seat 210 of the control rod driving mechanism of the nuclear power plant.
Referring to fig. 1 and 4, in an embodiment, the annular protrusion 122 is provided with a first sealing groove 1221, the column 115 is provided with a second sealing groove 1152, and the first sealing ring 150 is located in a first sealing space formed by the first sealing groove 1221 and the second sealing groove 1152, so as to seal a gap between the annular protrusion 122 and the column 115. The third seal groove 124 is arranged on the piston ring 120, the fourth seal groove 1153 is arranged on the seal portion 1151, the second seal ring 160 is located in a second seal space formed by the third seal groove 124 and the fourth seal groove 1153, and is used for sealing a gap between the piston ring 120 and the seal portion 1151, so that the tightness of the air cavity 123 is improved, the air pressure in the air cavity 123 after inflation can be further ensured, the pressure of the air received by the piston ring 120 is ensured, the pressure of the piston ring 120 to the moving portion 132 is ensured, and the moving portion 132 can be ensured to stably clamp the tube seat 210 of the control rod driving mechanism of the nuclear power plant.
Referring to fig. 1 and 3, in an embodiment, the clamping fixture 100 of the tube seat of the control rod driving mechanism of the nuclear power plant further includes a plurality of pressing plates 170 and a plurality of connecting rods (not shown), the pressing plates 170 are connected with the top plate 114 through the connecting rods, two limiting protruding portions 136 are respectively configured at two sides of one end of the moving portion 132, which is close to the top plate 114, along the radial direction of the housing 110, and the limiting protruding portions 136 are located between the top plate 114 and the pressing plates 170, so that the moving portion 132 moves between the pressing plates 170 and the top plate 114, thereby limiting the moving range of the moving portion 132.
Referring to fig. 1, in an embodiment, the top plate 114 is provided with a plurality of moving part slots 1141, the plurality of moving part slots 1141 are in one-to-one correspondence with the plurality of moving parts 132, and a portion of the moving parts 132 with two limiting protrusions 136 is located in the moving part slots 1141.
Referring to fig. 4, in an embodiment, the clamping tool 100 for the tube socket of the control rod driving mechanism of the nuclear power plant further includes a plurality of plastic gaskets 180, the plurality of plastic gaskets 180 are in one-to-one correspondence with the moving portion 132, and the plastic gaskets 180 are located between the tube socket 210 and the moving portion 132 of the control rod driving mechanism of the nuclear power plant, and since the outer side of the tube socket 210 of the control rod driving mechanism of the nuclear power plant is provided with threads, the plastic gaskets 180 can ensure that the threads on the outer side of the tube socket 210 of the control rod driving mechanism of the nuclear power plant are not damaged.
Referring to fig. 4, an embodiment of the present application further provides a clamping structure for a tube socket 210 of a control rod driving mechanism of a nuclear power plant, which is characterized in that the clamping structure includes a vent tube 190, a gas source (not shown), and a clamping fixture 100 for the tube socket of the control rod driving mechanism of the nuclear power plant, wherein one end of the vent tube 190 is connected with the gas source, and the other end is connected with an air inlet 113.
According to the clamping tool 100 and the clamping structure of the tube seat of the control rod driving mechanism of the nuclear power plant, the air source is used for inflating the air cavity 123 through the vent pipe 190 connected with the air inlet 113, so that the air applies pressure to the annular protruding portion 122, the piston ring 120 moves upwards, the first inclined surface 121 presses the second inclined surface 134, the moving portion 132 is pushed to be close to and clamp the tube seat 210 of the control rod driving mechanism of the nuclear power plant along the radial direction, the air is discharged from the air cavity 123 through the air inlet 113, the annular protruding portion 122 loses the air pressure, the piston moves downwards, the first inclined surface 121 releases the pressing of the second inclined surface 134, the moving portion 132 releases the tube seat 210 of the control rod driving mechanism of the nuclear power plant, and the clamping and releasing of the tube seat 210 of the control rod driving mechanism of the nuclear power plant are achieved through a simple and compact structure, so that the cost is reduced, and the maintenance efficiency is improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The utility model provides a centre gripping frock of nuclear power plant control rod actuating mechanism's tube socket which characterized in that includes: a housing, a piston ring, and a plurality of clamping assemblies;
the shell is hollow and cylindrical, the shell is used for being sleeved on a tube seat of the control rod driving mechanism of the nuclear power plant, a containing cavity is formed in the shell, and an air inlet hole is formed in the shell;
the piston ring is positioned in the accommodating cavity and is abutted with the inner wall of the shell so as to form an air cavity communicated with the air inlet hole between the piston ring and the shell, the air cavity is used for allowing air to enter through the air inlet hole and act on the piston ring to push the piston ring to move along the axial direction of the shell, and the inner wall of the piston ring is provided with a first inclined surface which is inclined along the axis of the shell towards the axis far away from the shell;
the clamping assemblies are uniformly distributed along the circumferential direction of the shell, the clamping assemblies are provided with second inclined planes attached to the first inclined planes, and the clamping assemblies are used for moving along the radial direction of the shell under the pushing action of the first inclined planes so as to clamp the tube seat of the control rod driving mechanism of the nuclear power plant.
2. The fixture for clamping a stem of a control rod driving mechanism for a nuclear power plant according to claim 1, wherein the clamping assembly comprises a guide portion and a moving portion;
the shell comprises a column body, and a top plate and a bottom plate which are respectively arranged at two ends of the column body, wherein a first through hole is formed in the top plate, a second through hole is formed in the bottom plate, the first through hole and the second through hole are coaxially arranged, and the inner wall of the first through hole and the inner wall of the second through hole are respectively used for being in butt joint with the outer side wall of the tube seat;
the outer wall of the piston ring is provided with an annular protruding part which is abutted with the column body of the shell, the bottom of the piston ring is abutted with the bottom plate, so that an air cavity communicated with the air inlet hole is formed between the piston ring and the shell, and the air inlet hole is formed in the bottom plate;
the guide part is connected with the bottom plate and is provided with a guide shaft extending along the tangential direction of the shell; the inner column body of the moving part is tightly attached to the tube seat of the control rod driving mechanism of the nuclear power plant, the outer column body of the moving part is provided with a second inclined plane attached to the first inclined plane, the moving part is provided with a sliding groove which inclines along the axis of the shell towards the axis far away from the shell, and the guide shaft is in sliding fit with the sliding groove.
3. The tool for clamping a tube seat of a control rod driving mechanism for a nuclear power plant according to claim 2, wherein the tool further comprises a plurality of elastic components; the elastic components are in one-to-one correspondence with the clamping components, one end of each elastic component is connected with the corresponding shell, the other end of each elastic component is connected with the corresponding moving part, and the extending direction of each elastic component is the radial direction of the corresponding shell.
4. A tool for clamping a socket of a control rod driving mechanism for a nuclear power plant according to claim 3, wherein said elastic assembly comprises: a first strut, a spring, and a second strut;
one end of the spring is connected with the first support column, and the other end of the spring is connected with the second support column;
one end of the first support column, which is far away from the spring, is connected with one side of the moving part, which is close to the shell;
and one end of the second support column, which is far away from the spring, is connected with the top plate.
5. The fixture for clamping a tube seat of a control rod driving mechanism for a nuclear power plant according to claim 4, wherein a receiving groove is formed in one side of the moving part, which is close to the shell;
the spring part is positioned in the accommodating groove;
one end of the first support column, which is far away from the spring, is connected with the bottom wall of the accommodating groove.
6. The clamping fixture for a tube socket of a control rod driving mechanism for a nuclear power plant according to any one of claims 2 to 5, wherein the clamping fixture further comprises a first sealing ring and a second sealing ring;
the lower end of the inner surface of the cylinder of the shell is provided with a sealing part protruding along the radial direction of the shell, and the sealing part seals a gap between the bottom of the piston ring and the bottom plate;
the first sealing ring is positioned between the annular protruding part and the cylinder;
the second seal ring is located between the piston ring and the seal portion.
7. The fixture for clamping a tube seat of a control rod driving mechanism of a nuclear power plant according to claim 6, wherein the annular protruding portion is provided with a first sealing groove, the column body is provided with a second sealing groove, and the first sealing ring is located in a first sealing space formed by the first sealing groove and the second sealing groove;
the piston ring is provided with a third sealing groove, the sealing part is provided with a fourth sealing groove, and the second sealing ring is positioned in a second sealing space formed by the third sealing groove and the fourth sealing groove.
8. The fixture for clamping a tube seat of a control rod driving mechanism for a nuclear power plant according to claim 2, wherein the fixture further comprises a plurality of pressing plates and a plurality of connecting rods;
the pressing plate is connected with the top plate through the connecting rod;
two limiting protruding portions are respectively formed on two sides of one end, close to the top plate, of the moving portion along the radial direction of the shell, and the limiting protruding portions are located between the top plate and the pressing plate.
9. The tool for clamping a tube seat of a control rod driving mechanism for a nuclear power plant according to claim 8, wherein a plurality of moving part grooves are formed in the top plate, the moving part grooves correspond to the moving parts one by one, and the moving parts are provided with two limiting protruding parts, and the two limiting protruding parts are located in the moving part grooves.
10. A clamping structure of a tube seat of a control rod driving mechanism of a nuclear power plant, which is characterized by comprising a vent pipe, a gas source and a clamping fixture of the tube seat of the control rod driving mechanism of the nuclear power plant as claimed in any one of claims 1-9;
one end of the vent pipe is connected with the air source, and the other end of the vent pipe is connected with the air inlet hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320140783.8U CN219286053U (en) | 2023-01-13 | 2023-01-13 | Clamping tool and clamping structure of tube seat of control rod driving mechanism of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320140783.8U CN219286053U (en) | 2023-01-13 | 2023-01-13 | Clamping tool and clamping structure of tube seat of control rod driving mechanism of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219286053U true CN219286053U (en) | 2023-06-30 |
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ID=86929647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320140783.8U Active CN219286053U (en) | 2023-01-13 | 2023-01-13 | Clamping tool and clamping structure of tube seat of control rod driving mechanism of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219286053U (en) |
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2023
- 2023-01-13 CN CN202320140783.8U patent/CN219286053U/en active Active
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