CN112017795B - Spatial layout structure of driving mechanism and built-in control rod driving mechanism - Google Patents
Spatial layout structure of driving mechanism and built-in control rod driving mechanism Download PDFInfo
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- CN112017795B CN112017795B CN202010761837.3A CN202010761837A CN112017795B CN 112017795 B CN112017795 B CN 112017795B CN 202010761837 A CN202010761837 A CN 202010761837A CN 112017795 B CN112017795 B CN 112017795B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/12—Means for moving control elements to desired position
- G21C7/16—Hydraulic or pneumatic drive
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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 invention relates to the technical field of nuclear reactor control rod hydraulic drive equipment, in particular to a spatial layout structure of a drive mechanism and a built-in control rod drive mechanism. The structure includes: the inner sleeve is sleeved in shaft holes of the lifting hydraulic cylinder, the transmission pin claw mechanism, the clamping hydraulic cylinder and the clamping pin claw mechanism from top to bottom; the transmission sleeve is assembled between the inner sleeve and the transmission hydraulic cylinder, one end of the transmission sleeve is connected with the lifting hydraulic cylinder, and the other end of the transmission sleeve is assembled between the inner sleeve and the transmission pin claw mechanism and is in linkage connection with the transmission pin claw mechanism; and the clamping sleeve is assembled between the inner sleeve and the clamping pin claw mechanism and is in linkage connection with the clamping pin claw mechanism. The structure can ensure that the control rod driving shaft in a moving state is stressed uniformly and abraded uniformly on the basis of ensuring the reliable movement of the control rod driving shaft, and meets the layout requirements of the water conduit pipe and the support.
Description
Technical Field
The invention relates to the technical field of nuclear reactor control rod hydraulic drive equipment, in particular to a spatial layout structure of a drive mechanism and a built-in control rod drive mechanism.
Background
The nuclear reactor control rod driving mechanism, referred to as the driving mechanism for short, is the most critical safety equipment of the reactor and is responsible for the important functions of starting, power regulation, shutdown and the like of the reactor. The control rod drive mechanism can be divided into an external control rod drive mechanism and an internal control rod drive mechanism according to the installation position of the control rod. The hydraulic driving system of the nuclear reactor control rod is a built-in control rod driving mechanism, the driving mechanism is arranged in the high-temperature, high-pressure and irradiation environment in a reactor pressure container, and the lifting, transferring and clamping three hydraulic cylinders are adopted to drive the transferring and clamping two sets of pin claw mechanisms to move in sequence, so that the functions of lifting, descending and dropping the control rod are realized.
Based on the working principle of the driving mechanism, the existing built-in control rod driving mechanism has the following problems: the problems of uneven stress and uneven wear of the control rod driving shaft are easily caused in the process that the control rod driving shaft moves in the driving mechanism; moreover, the diversion pipe in the driving mechanism is also easy to deviate from the pipe walking and supporting position due to the unreasonable influence of the spatial layout of the driving mechanism. Therefore, the above problems are all easy to cause the problems of low working efficiency and poor structural strength of the driving mechanism.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention provides a spatial layout structure of a driving mechanism, which aims to solve the problems that the control rod driving shaft is easy to be stressed unevenly and abraded unevenly in the process of moving the control rod driving shaft in the driving mechanism.
The invention also provides a built-in control rod driving mechanism.
According to an embodiment of an aspect of the present invention, a spatial layout structure of a driving mechanism includes:
the inner sleeve is sleeved in shaft holes of the lifting hydraulic cylinder, the transmission pin claw mechanism, the clamping hydraulic cylinder and the clamping pin claw mechanism from top to bottom;
the transmission sleeve is assembled between the inner sleeve and the transmission hydraulic cylinder, one end of the transmission sleeve is connected with the lifting hydraulic cylinder, and the other end of the transmission sleeve is assembled between the inner sleeve and the transmission pin claw mechanism and is in linkage connection with the transmission pin claw mechanism;
and the clamping sleeve is assembled between the inner sleeve and the clamping pin claw mechanism and is in linkage connection with the clamping pin claw mechanism.
According to one embodiment of the invention, the inner sleeve comprises a cylinder body, and a lifting step, a clamping step and a limiting step which are constructed on the cylinder body from top to bottom, the transfer sleeve is sleeved between the lifting step and the clamping step, the transfer sleeve is provided with a transfer step, a first installation position is arranged between the transfer step and the clamping step, and a second installation position is arranged between the clamping step and the limiting step; the lifting hydraulic cylinder is installed on the lifting step, the transmission hydraulic cylinder is installed on the transmission step, the transmission pin claw mechanism is installed on the first installation position, the clamping hydraulic cylinder is installed on the clamping step, the clamping pin claw mechanism is installed on the second installation position, and the limiting step is used for installing a limiting blocking piece.
According to an embodiment of the invention, the inner sleeve further comprises a first mounting mechanism, the first mounting location and the second mounting location are respectively provided with the first mounting mechanism; the transmission sleeve and the clamping sleeve are respectively provided with a second mounting mechanism matched with the first mounting mechanism, and the second mounting mechanism is correspondingly assembled outside the first mounting mechanism;
the top end of the transmission sleeve is provided with the transmission step, the bottom end of the transmission sleeve is provided with the second mounting mechanism, and the second mounting mechanism on the transmission sleeve is in linkage connection with the transmission pin claw mechanism;
and a second mounting mechanism on the clamping sleeve is in linkage connection with the clamping pin and claw mechanism.
According to one embodiment of the invention, the transfer latch mechanism and the gripper latch mechanism each comprise:
the pin claw sleeve is sleeved outside the second mounting mechanism, the top end of the pin claw sleeve is connected with the transmission hydraulic cylinder or the clamping hydraulic cylinder, and the bottom end of the pin claw sleeve is in linkage connection with the second mounting mechanism;
a pawl body pivotally connected to the second mounting mechanism and rotatably movable through the first mounting mechanism to grasp and control movement of the control rod drive shaft;
and one end of the positioning block is fixedly arranged on the second mounting mechanism, and the other end of the positioning block extends into the first mounting mechanism.
According to one embodiment of the invention, the first mounting mechanism comprises:
the claw sliding grooves are used for allowing the claw bodies to penetrate through, and are uniformly distributed along the circumferential direction of the cylinder body; and the number of the first and second groups,
and the positioning sliding grooves are used for the positioning blocks to stretch into, and the positioning sliding grooves are arranged between any adjacent claw sliding grooves.
According to one embodiment of the invention, the second mounting mechanism comprises:
the claw grooves are uniformly distributed along the circumferential direction of the transfer sleeve or the clamping sleeve respectively, each claw groove is correspondingly arranged on the outer side of each corresponding claw sliding groove respectively, one end of each claw groove is connected with the claw body in a pivoting manner, and the other end of each claw groove is linked with the pin claw sleeve respectively; and (c) a second step of,
at least one positioning groove is formed between any adjacent claw sliding grooves and correspondingly arranged on the outer sides of the corresponding positioning sliding grooves, one end of each positioning block is fixedly connected into the corresponding positioning groove, and the other end of each positioning block extends into the corresponding positioning sliding groove.
According to an embodiment of the present invention, a longitudinal direction of the pawl slide groove and a longitudinal direction of the positioning slide groove are both arranged in parallel to an axial direction of the cylinder.
According to one embodiment of the invention, the clamping steps comprise a first clamping step and a second clamping step which are configured on the cylinder body, and the first clamping step and the second clamping step are configured between a first installation position and a second installation position from top to bottom;
the clamping hydraulic cylinder is arranged on the first clamping step;
the clamping pin claw mechanism further comprises a spring frame and a spring body, the spring frame is mounted on the second clamping step, and the spring body is elastically mounted between the spring frame and the clamping sleeve.
According to one embodiment of the invention, the device further comprises a water diversion groove for embedding the water diversion pipe, and the water diversion groove is respectively constructed on the outer walls of the lifting hydraulic cylinder, the transfer hydraulic cylinder and the clamping hydraulic cylinder.
According to another aspect of the invention, the built-in control rod driving mechanism has the spatial layout structure of the driving mechanism; the built-in control rod driving mechanism comprises a lifting hydraulic cylinder, a transmission pin claw mechanism, a clamping hydraulic cylinder and a clamping pin claw mechanism which are sleeved outside the inner sleeve from top to bottom;
the transmission pin claw mechanism is connected with the transmission hydraulic cylinder and is connected with the lifting hydraulic cylinder through a transmission sleeve;
the clamping pin claw mechanism is respectively connected with the clamping sleeve and the clamping hydraulic cylinder;
the transfer pin jaw mechanism and the clamping pin jaw mechanism are respectively used for grabbing the control rod driving shaft and driving the control rod driving shaft to move.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
in the spatial layout structure of the driving mechanism, the inner sleeve is provided with a channel for the control rod driving shaft to axially move along the axial direction, the inner sleeve is sleeved in shaft holes of the lifting hydraulic cylinder, the transmission pin claw mechanism, the clamping hydraulic cylinder and the clamping pin claw mechanism from top to bottom, and the inner sleeve is used for accurately and axially positioning all parts of the driving mechanism, so that reliable linkage and smoothness of connection among the hydraulic cylinders and connection between the hydraulic cylinders and the pin claw mechanisms are ensured. The transmission sleeve is assembled between the inner sleeve and the transmission hydraulic cylinder, one end of the transmission sleeve is connected with the lifting hydraulic cylinder, the other end of the transmission sleeve is assembled between the inner sleeve and the transmission pin claw mechanism and is in linkage connection with the transmission pin claw mechanism, and the lifting hydraulic cylinder can reliably transmit power to the transmission pin claw mechanism by using the transmission sleeve and plays a driving role together with the transmission hydraulic cylinder on the transmission pin claw mechanism; the clamping sleeve is assembled between the inner sleeve and the clamping pin claw mechanism and is in linkage connection with the clamping pin claw mechanism, and the clamping sleeve can perform axial positioning and power transmission on the clamping pin claw mechanism, so that the clamping sleeve and the clamping hydraulic cylinder jointly drive the clamping pin claw mechanism.
Therefore, the space layout structure of the driving mechanism is reasonably optimized, and the structure not only can ensure that the control rod driving shaft in a moving state is uniformly stressed and abraded, but also can ensure that the water conduit running pipe and the supporting layout in the driving mechanism are accurate on the basis of ensuring the reliable movement of the control rod driving shaft, thereby not only meeting the engineering application of the built-in control rod driving mechanism, but also providing a better choice for the engineering design of water pressure driving mechanisms in other industrial fields.
Furthermore, in the spatial layout structure of the driving mechanism, the axial positioning among all parts is accurate, so that the connection and linkage among all parts and the grabbing and controlling processes of the pin claw mechanism on the control rod driving shaft are more accurate.
The built-in control rod driving mechanism provided by the embodiment of the invention has the spatial layout structure of the driving mechanism. The built-in control rod driving mechanism comprises a lifting hydraulic cylinder, a transmission pin claw mechanism, a clamping hydraulic cylinder and a clamping pin claw mechanism which are sleeved outside the inner sleeve from top to bottom; the transmission pin claw mechanism is connected with the transmission hydraulic cylinder and is connected with the lifting hydraulic cylinder through a transmission sleeve; the clamping pin claw mechanism is respectively connected with the clamping sleeve and the clamping hydraulic cylinder; the transfer pin and clamping pin and pawl mechanisms are each adapted to grip and drive movement of a control rod drive shaft. By arranging the spatial layout structure of the driving mechanism, the built-in control rod driving mechanism has all the advantages of the spatial layout structure of the driving mechanism, and the detailed description is omitted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an assembly view of an embodiment of the present invention with an internal CRDM;
FIG. 2 is a schematic view of the inner sleeve of an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a transfer sleeve according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a clamping sleeve according to an embodiment of the invention.
Reference numerals:
1: lifting the hydraulic cylinder; 2: a transfer hydraulic cylinder; 3: a transfer pin and pawl mechanism; 4: positioning blocks; 5: clamping the hydraulic cylinder; 6: a clamp pin jaw mechanism; 7: a limiting plug; 8: an inner sleeve; 801: a barrel; 9: lifting the inner sleeve cylinder; 10: a transfer sleeve; 11: a transfer inner sleeve cylinder; 12: clamping the inner sleeve cylinder; 13: a spring holder; 14: a clamping sleeve; 15: lifting the step; 16: a transfer step; 17: a transfer claw groove; 18: a delivery positioning slot; 19: a transfer pawl chute; 20: a transfer positioning chute; 21: a first holding step; 22: a second holding step; 23: a gripper jaw chute; 24: a clamping jaw slot; 25: clamping a positioning groove; 26: clamping and positioning the sliding chute; 27: and a limiting step.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 4, the embodiment of the present invention provides a spatial layout structure of a drive mechanism (the embodiment of the present invention is simply referred to as "layout structure"), and provides a built-in control rod drive mechanism (the embodiment of the present invention is simply referred to as "drive mechanism") based on the layout structure.
As shown in fig. 1, the arrangement includes an inner sleeve 8, a transfer sleeve 10, and a clamping sleeve 14.
Referring to fig. 2, the inner sleeve 8 is provided with a channel for the control rod driving shaft to move axially, the inner sleeve 8 is sleeved in the shaft holes of the lifting hydraulic cylinder 1, the transmission hydraulic cylinder 2, the transmission pin claw mechanism 3, the clamping hydraulic cylinder 5 and the clamping pin claw mechanism 6 from top to bottom, and the inner sleeve 8 is used for accurately positioning each component of the driving mechanism axially, so that reliable linkage and smoothness of connection between the hydraulic cylinders and the pin claw mechanisms are ensured.
As shown in fig. 3, the transmission sleeve 10 is assembled between the inner sleeve 8 and the transmission hydraulic cylinder 2, one end of the transmission sleeve 10 is connected to the lifting hydraulic cylinder 1, the other end of the transmission sleeve 10 is assembled between the inner sleeve 8 and the transmission pin claw mechanism 3 and is linked with the transmission pin claw mechanism 3, the lifting hydraulic cylinder 1 can reliably transmit power to the transmission pin claw mechanism 3 by using the transmission sleeve 10, and the transmission pin claw mechanism 3 is driven together with the transmission hydraulic cylinder 2. In other words, the transfer pin claw mechanism 3 is connected with the transfer hydraulic cylinder 2 and is connected with the lifting hydraulic cylinder 1 through the transfer sleeve 10, and the specific connection structure is described in the embodiment of the present invention and is not described herein again.
As shown in fig. 4, the clamping sleeve 14 is assembled between the inner sleeve 8 and the clamping pin and jaw mechanism 6 and is linked with the clamping pin and jaw mechanism 6, and the clamping sleeve 14 can axially position and transmit power to the clamping pin and jaw mechanism 6, so as to drive the clamping pin and jaw mechanism 6 together with the clamping hydraulic cylinder 5. In other words, the clamping pin and claw mechanism 6 is connected to the clamping sleeve 14 and the clamping hydraulic cylinder 5, and the specific connection structure is described in the embodiment of the present invention and will not be described herein again.
Therefore, in the layout structure provided by the embodiment of the invention, the spatial layout of the driving mechanism is reasonably optimized. The structure can ensure that the control rod driving shaft in a moving state is stressed uniformly and abraded uniformly on the basis of ensuring the reliable movement of the control rod driving shaft, not only meets the engineering application of a built-in control rod driving mechanism, but also provides a better choice for the engineering design of water pressure driving mechanisms in other industrial fields. In addition, in the spatial layout structure of the driving mechanism, the axial positioning among all parts is accurate, so that the connection and linkage among all parts and the grabbing and control processes of the pin claw mechanism to the control rod driving shaft are more accurate.
It can be understood that, in order to ensure that the water conduit running pipe and the support layout in the driving mechanism are accurate, the layout structure also comprises a water conduit groove for embedding the water conduit. The water tanks are respectively constructed on the outer walls of the lift cylinder 1, the transfer cylinder 2, and the clamp cylinder 5. The water conduit leading from the spring box can be continuously embedded in the outer walls of the lifting hydraulic cylinder 1, the transmission hydraulic cylinder 2 and the clamping hydraulic cylinder 5. And, it is preferable that the penstock has a moving space inside the penstock. Due to the structural arrangement, the running pipe and the support of the water conduit do not interfere with each component of the driving mechanism in a working state, and the structural stability of each component of the driving mechanism is not adversely affected; on the contrary, each component of the driving mechanism in the motion state can not cause the fracture of the water conduit. Therefore, the layout structure can meet the requirements of the water conduit for pipe running and supporting.
In one embodiment, as shown in fig. 2 to 4, the inner sleeve 8 includes a barrel 801, and a lifting step 15, a holding step, and a stopping step 27 configured on the barrel 801 from the top down. Wherein, promote hydraulic cylinder 1 and install in promoting step 15, centre gripping hydraulic cylinder 5 is installed in the centre gripping step, and spacing step 27 is used for installing spacing stifled piece 7 to promote hydraulic cylinder 1, centre gripping hydraulic cylinder 5 and spacing stifled piece 7's axial mounted position has carried out reasonable location and has fixed. The transfer sleeve 10 is sleeved between the lifting step 15 and the clamping step, the transfer sleeve 10 is provided with a transfer step 16, and the transfer hydraulic cylinder 2 is arranged on the transfer step 16, so that the axial installation position of the transfer hydraulic cylinder 2 is reasonably positioned and fixed. A first installation position is arranged between the transfer step 16 and the clamping step, a second installation position is arranged between the clamping step and the limiting step 27, the transfer pin claw mechanism 3 is installed at the first installation position, and the clamping pin claw mechanism 6 is installed at the second installation position, so that the axial installation positions of the transfer pin claw mechanism 3 and the clamping pin claw mechanism 6 are reasonably positioned and fixed. By utilizing the structure of the inner sleeve 8, the axial installation positions of all the components of the driving mechanism on the inner sleeve 8 are reasonably positioned and fixed one by one, and powerful guarantee is provided for linkage of all the components of the driving mechanism.
It can be understood that the lifting step 15, the transferring step 16 and the clamping step are all provided with threads, so that the lifting hydraulic cylinder 1, the transferring hydraulic cylinder 2 and the clamping hydraulic cylinder 5 can be assembled on the cylinder body 801 of the inner sleeve 8 through thread locking, and reliable positioning, flexible assembly and disassembly and repeated construction are facilitated.
In one embodiment, as shown in fig. 2, the clamping steps specifically include a first clamping step 21 and a second clamping step 22 configured on barrel 801. The first and second holding steps 21, 22 are formed between the first and second mounting locations from top to bottom. The clamping hydraulic cylinder 5 is arranged on the first clamping step 21, the first clamping step 21 provides accurate axial positioning for reliable connection and linkage of the clamping hydraulic cylinder 5 and the clamping pin claw mechanism 6, and flexible assembly and disassembly of the clamping hydraulic cylinder 5 are facilitated. The clamping pin jaw mechanism 6 comprises a spring frame 13 and a spring body, wherein the spring frame 13 is arranged on the second clamping step 22, and the spring body is elastically arranged between the spring frame 13 and the clamping sleeve 14. Preferably, the spring holder 13 is configured with a downwardly open channel inside, into which one end of the spring body extends and is attached, and the other end of the spring body is attached to the top of the clamping sleeve 14. The second clamping step 22 fixes the spring holder 13 and the inner sleeve 8 reliably and facilitates flexible assembly and disassembly, and also can perform accurate axial positioning among the spring holder 13, the spring body and the clamping sleeve 14, and presets the compression potential energy of the spring body, so as to compensate the axial shake and the axial installation error of the clamping sleeve 14 by using the spring body.
In one embodiment, as shown in figure 2, the inner sleeve 8 further comprises a first mounting mechanism, the first and second mounting locations each being provided with a first mounting mechanism. As shown in fig. 3 and 4, the second mounting mechanisms matched with the first mounting mechanisms are respectively configured on the transmission sleeve 10 and the clamping sleeve 14, and the second mounting mechanisms are correspondingly assembled outside the first mounting mechanisms, so that the transmission pin and claw mechanism 3 assembled outside the transmission sleeve 10 can accurately act on the first mounting mechanisms and the second mounting mechanisms, and the reliability of the working process and the movement smoothness of the transmission pin and claw mechanism 3 are improved.
As shown in fig. 1, the transfer pin claw mechanism 3 and the grip pin claw mechanism 6 each include a pin claw sleeve, a claw body, and a positioning block 4, respectively.
In the transfer pin and pawl mechanism 3, the pawl body is pivotally connected to the second mounting means of the transfer sleeve 10 and by rotating the first mounting means which is capable of passing through the first mounting location of the inner sleeve 8, grips and controls the control rod drive shaft movement.
In the transfer pin claw mechanism 3, as shown in fig. 3, the top end of the transfer sleeve 10 is configured with a transfer step 16, and the bottom end of the transfer sleeve 10 is configured with a second mounting mechanism that is fitted outside the first mounting position, so that the axial connecting position of the transfer cylinder 2 and the transfer pin claw mechanism 3 is accurately positioned by using the axial positions of the transfer step 16 and the second mounting mechanism. And, the second installation mechanism on the transmission cover 10 is linked with the transmission latch mechanism 3, specifically: the pin claw sleeve is sleeved outside the second mounting mechanism of the transfer sleeve 10, the top end of the pin claw sleeve is connected with the transfer inner sleeve cylinder 11 of the transfer hydraulic cylinder 2, and the bottom end of the pin claw sleeve is in linkage connection with the second mounting mechanism of the transfer sleeve 10. On one hand, the lifting hydraulic cylinder 1 generates a driving effect by utilizing pressure charging and releasing, so that the claw body of the transmission pin claw mechanism 3 can be driven to move along the axial direction of the inner sleeve 8 through the transmission sleeve 10; on the other hand, the transmission hydraulic cylinder 2 drives the pin claw sleeve of the transmission pin claw mechanism 3 to move along the axial direction of the inner sleeve 8 by utilizing the pressure charging and discharging energy, and utilizes the linkage between the pin claw sleeve and the second mounting structure on the transmission sleeve 10 to change the position relation between the pin claw sleeve and the transmission sleeve 10, so as to drive the claw body on the transmission sleeve 10 to rotate, so that the transmission pin claw mechanism 3 can grasp (or release) the control rod driving shaft, and the control rod driving shaft can be driven to move after the control rod driving shaft is grasped.
In the transmission pin claw mechanism 3, one end of a positioning block 4 is fixedly arranged on a second mounting mechanism of the transmission sleeve 10, and the other end of the positioning block 4 extends into a first mounting mechanism of a first mounting position of the inner sleeve 8. In the working process of the transmission pin claw mechanism 3, the first mounting mechanism can accurately limit the axial position and the circumferential position of the positioning block 4, and can limit the relative movement direction between the positioning block 4 and the first mounting mechanism in the process of respectively performing equidirectional or opposite axial movement on the transmission sleeve 10 and the pin claw sleeve, so as to ensure high movement smoothness, high movement accuracy and high structural reliability of the transmission pin claw mechanism 3.
In the gripper pin and jaw mechanism 6, the jaw body is pivotally connected to the second mounting means of the gripper sleeve 14 and by rotating the first mounting means which can pass through the second mounting location of the inner sleeve 8 to grip the control rod drive shaft, it is possible to provide a more sufficient and reliable grip to ensure that the control rod drive shaft can be reliably positioned at the current height in the event that the transfer pin and jaw mechanism 3 grips the control rod drive shaft.
In the clamping pin jaw mechanism 6, as shown in fig. 4, the clamping sleeve 14 is configured with a second mounting mechanism which is assembled outside the second mounting position, and since the clamping sleeve 14 is assembled outside the inner sleeve 8, and the second mounting mechanism of the clamping sleeve 14 is matched with the first mounting mechanism on the second mounting position of the inner sleeve 8, the jaw body of the clamping pin jaw mechanism 6 is accurately axially positioned relative to the grabbing position of the control rod driving shaft. The second mounting mechanism on the clamp sleeve 14 is linked to the clamp pin and claw mechanism 6. The method comprises the following specific steps: the pin claw sleeve is sleeved outside the second mounting mechanism of the clamping sleeve 14, the top end of the pin claw sleeve is connected with the clamping inner sleeve cylinder 12 of the clamping hydraulic cylinder 5, and the bottom end of the pin claw sleeve is in linkage connection with the second mounting mechanism of the clamping sleeve 14. The clamping hydraulic cylinder 5 utilizes the pressure charging and discharging energy to drive the pin claw sleeve of the clamping pin claw mechanism 6 to move along the axial direction of the inner sleeve 8, and the clamping sleeve 14 is fixedly arranged outside the second installation position of the inner sleeve 8, so that the axial movement process of the pin claw sleeve can change the position relation between the pin claw sleeve and the clamping sleeve 14, and the claw body on the clamping sleeve 14 is driven to rotate, so that the clamping pin claw mechanism 6 can grasp (or loosen) the control rod driving shaft.
In the clamping pin claw mechanism 6, one end of a positioning block 4 is fixedly arranged on a second mounting mechanism of the clamping sleeve 14, and the other end of the positioning block 4 extends into a first mounting mechanism of a second mounting position of the inner sleeve 8. In the working process of the clamping pin claw mechanism 6, the first mounting mechanism can accurately limit the axial position and the circumferential position of the positioning block 4, and can limit the movement direction of the positioning block 4 in the process of making relative movement between the clamping sleeve 14 and the pin claw sleeve along the axial direction, so that the high movement smoothness, the high movement accuracy and the high structural reliability of the clamping pin claw mechanism 6 are ensured.
In one embodiment, as shown in fig. 2, the first mounting mechanism specifically includes a plurality of pawl chutes and at least one positioning chute. The claw sliding grooves are used for allowing the claw bodies to penetrate through, and all the claw sliding grooves on the same installation position are uniformly distributed along the circumferential direction of the cylinder body 801; the claw spout can restrict the shake volume of the claw body to reduce the shake of the claw body, and can also accurately position the circumferential position of each claw body, ensure that the claw body passes through the claw spout and accurately and smoothly grasp on the control rod driving shaft, and prevent the control rod from slipping. The positioning sliding grooves are used for the positioning blocks 4 to extend into, and positioning sliding grooves are arranged between any adjacent claw sliding grooves on the same installation position; the location spout can restrict the shake volume of fixed block to reduce the shake of locating piece 4, and can also accurately inject the circumferential position of locating piece 4. In addition, in the process that the positioning block 4 on the transmission sleeve 10 axially moves along with the transmission sleeve 10, the positioning chute at the corresponding position can also reserve a space for the positioning block 4 to move so as to improve the working smoothness of the transmission pin claw mechanism 3.
It will be appreciated that the length direction of the pawl slide groove and the length direction of the positioning slide groove in the first mounting structure are both arranged parallel to the axial direction of the cylinder 801, so as to ensure that the axial movement of the pawl body and the axial movement of the positioning block 4, i.e. the axial movement of the transmission sleeve 10 and the axial shaking of the clamping sleeve 14, are both controllable.
Accordingly, as shown in fig. 3 or 4, the second mounting mechanism includes a plurality of claw grooves and at least one positioning groove. A plurality of claw groove respectively along the circumference evenly distributed of transmission cover 10 or centre gripping cover 14, every claw groove corresponds respectively and sets up in the outside of corresponding every claw spout, pivotable connection has the claw body in the one end of every claw groove, the other end of every claw groove respectively with round pin claw cover linkage. In other words, on one hand, the pin claw sleeve can drive the claw groove to move in the process of axial movement, so that the position relation between the pin claw sleeve and a claw body arranged in the claw groove is changed, and the claw body is driven to rotate and can pass through the claw sliding groove; on the other hand, the claw grooves on the transfer sleeve 10 can move axially under the driving of the transfer hydraulic cylinder 2, so as to drive the claw bodies to move along the claw sliding grooves, and thus the claw bodies drive the control rod driving shaft to move axially in the channel of the inner sleeve 8. Positioning grooves are constructed between any adjacent claw sliding grooves, each positioning groove is correspondingly arranged on the outer side of the corresponding positioning sliding groove, one end of each positioning block 4 is fixedly connected into each positioning groove, and the other end of each positioning block extends into the corresponding positioning sliding groove. By utilizing the connection relationship among the positioning grooves, the positioning blocks 4 and the positioning chutes, the transfer sleeve 10 or the clamping sleeve 14 can be accurately axially and circumferentially positioned with the corresponding mounting positions on the inner sleeve 8.
It can be understood that the number of the claw sliding grooves, the number of the claw bodies and the number of the claw grooves on the same mounting position are matched, so that each claw body can smoothly pass through the claw sliding grooves. In a similar way, the number of the positioning chutes, the number of the positioning blocks 4 and the number of the positioning grooves on the same installation position are matched, so that the positioning mechanism formed among the positioning chutes, the positioning blocks 4 and the positioning grooves can work smoothly, and the structural reliability is improved.
In one embodiment, as shown in fig. 2 and 3, at least three transfer pawl chutes 19 are uniformly formed in the first mounting position of the inner sleeve 8 along the circumferential direction of the cylinder 801. Correspondingly, at least three transfer claw grooves 17 are formed uniformly on the transfer sleeve 10 in the circumferential direction of the transfer sleeve 10. Each transfer pawl slot 17 is arranged exactly outside the transfer pawl gate 19. The top end of each transfer claw groove 17 is connected with a rotatable claw body, and the bottom end of each transfer claw groove 17 is connected with the bottom end of a pin claw sleeve of the transfer pin claw mechanism 3 in a linkage mode. The top end of the transfer sleeve 10 is connected to the lift inner sleeve cylinder 9 of the lift hydraulic cylinder 1, and the pin claw sleeve top end of the transfer pin claw mechanism 3 is connected to the transfer inner sleeve cylinder 11 of the transfer hydraulic cylinder 2. Furthermore, a transfer positioning slot 20 is formed between two adjacent transfer pawl slots 19 in the first installation position of the inner sleeve 8. Correspondingly, a transfer positioning groove 18 is formed between two adjacent transfer claw grooves 17 on the transfer sleeve 10. The transfer positioning slot 18 is accurately disposed outside the transfer positioning chute 20. One end of a positioning block 4 of the transmission pin claw mechanism 3 is fixedly arranged in the transmission positioning groove 18, and the other end of the positioning block extends into the transmission positioning chute 20.
As shown in fig. 2 and 4, at least three gripper jaw sliding grooves 23 are formed uniformly in the second mounting position of the inner sleeve 8 along the circumferential direction of the cylinder 801. Correspondingly, at least three clamping claw grooves 24 are formed uniformly on the clamping sleeve 14 in the circumferential direction of the clamping sleeve 14. Each gripper jaw slot 24 is arranged exactly outside the gripper jaw runner 23. The top end of each clamping claw groove 24 is respectively connected with a rotatable claw body, and the bottom end of each clamping claw groove 24 is respectively connected with the bottom end of a pin claw sleeve of the clamping pin claw mechanism 6 in a linkage manner. The clamping sleeve 14 is fastened outside the second mounting position of the inner sleeve 8 and is resiliently connected to the spring holder 13 fastened to the second clamping step 22 of the inner sleeve 8. The top end of a pin claw sleeve of the pin claw clamping mechanism 6 is connected with a clamping inner sleeve cylinder 12 of the clamping hydraulic cylinder 5. Furthermore, a clamping and positioning slot 26 is formed between two adjacent clamping claw slots 23 in the second mounting position of the inner sleeve 8, i.e. at least two clamping and positioning slots 26 are formed in the second mounting position. Correspondingly, a holding positioning slot 25 is formed between two adjacent holding claw slots 24 on the holding sleeve 14, i.e. at least two holding positioning slots 25 are formed on the holding sleeve 14. Each of the clamp positioning grooves 25 is accurately disposed outside the corresponding clamp positioning slide groove 26. One end of each positioning block 4 of the clamping pin claw mechanism 6 is fixedly arranged in the corresponding clamping positioning groove 25, and the other end of each positioning block 4 of the clamping pin claw mechanism 6 extends into the corresponding clamping positioning sliding groove 26.
As shown in fig. 1, the driving mechanism according to the embodiment of the present invention has the spatial layout structure of the driving mechanism. The driving mechanism comprises a lifting hydraulic cylinder 1, a transmission hydraulic cylinder 2, a transmission pin claw mechanism 3, a clamping hydraulic cylinder 5 and a clamping pin claw mechanism 6 which are sleeved outside an inner sleeve 8 from top to bottom. The transmission pin claw mechanism 3 is connected with the transmission hydraulic cylinder 2 and is connected with the lifting hydraulic cylinder 1 through a transmission sleeve 10; the clamping pin claw mechanism 6 is respectively connected with the clamping sleeve 14 and the clamping hydraulic cylinder 5; the transfer pin jaw mechanism 3 and the clamping pin jaw mechanism 6 are used to grip and drive the control rod drive shaft, respectively. The specific connection structure of the driving mechanism is as described above, and is not described in detail here. By arranging the spatial layout structure of the driving mechanism, the built-in control rod driving mechanism has all the advantages of the spatial layout structure of the driving mechanism, and the detailed description is omitted.
It can be understood that the driving mechanism in the embodiment of the present invention includes a lifting hydraulic cylinder 1, a transmission hydraulic cylinder 2, a transmission pin and claw mechanism 3, a clamping hydraulic cylinder 5, a clamping pin and claw mechanism 6, and may further include a limiting block 7.
It will be appreciated that the axial direction described in the embodiments of the present invention refers to the axial direction of the inner sleeve 8, and the inner sleeve 8, the transfer sleeve 10 and the clamping sleeve 14 are coaxially arranged.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A spatial layout structure of a driving mechanism, comprising:
the inner sleeve is sleeved in shaft holes of the lifting hydraulic cylinder, the transmission pin claw mechanism, the clamping hydraulic cylinder and the clamping pin claw mechanism from top to bottom;
the transmission sleeve is assembled between the inner sleeve and the transmission hydraulic cylinder, one end of the transmission sleeve is connected with the lifting hydraulic cylinder, and the other end of the transmission sleeve is assembled between the inner sleeve and the transmission pin claw mechanism and is in linkage connection with the transmission pin claw mechanism;
the clamping sleeve is assembled between the inner sleeve and the clamping pin claw mechanism and is in linkage connection with the clamping pin claw mechanism;
the inner sleeve comprises a barrel body and a clamping step constructed on the barrel body, a transfer step is constructed on the transfer sleeve, a first installation position is arranged between the transfer step and the clamping step, the transfer hydraulic cylinder is installed on the transfer step, the transfer pin claw mechanism is installed on the first installation position, and the clamping hydraulic cylinder is installed on the clamping step.
2. The spatial layout structure of the driving mechanism according to claim 1, wherein the inner sleeve comprises a lifting step, a clamping step and a limiting step which are configured on the barrel body from top to bottom, the transmission sleeve is sleeved between the lifting step and the clamping step, and a second mounting position is arranged between the clamping step and the limiting step; the lifting hydraulic cylinder is installed on the lifting step, the clamping pin claw mechanism is installed on the second installation position, and the limiting step is used for installing a limiting blocking piece.
3. The spatial arrangement structure of driving mechanisms according to claim 2, wherein said inner sleeve further comprises a first mounting mechanism, and said first mounting position and said second mounting position are respectively provided with said first mounting mechanism; the transmission sleeve and the clamping sleeve are respectively provided with a second mounting mechanism matched with the first mounting mechanism, and the second mounting mechanism is correspondingly assembled outside the first mounting mechanism;
the top end of the transmission sleeve is provided with the transmission step, the bottom end of the transmission sleeve is provided with the second mounting mechanism, and the second mounting mechanism on the transmission sleeve is in linkage connection with the transmission pin claw mechanism;
the second mounting mechanism on the clamping sleeve is in linkage connection with the clamping pin and claw mechanism;
the first mounting mechanism comprises a plurality of claw chutes and at least one positioning chute, the claw chutes on the same mounting position are uniformly distributed along the circumferential direction of the cylinder, and the positioning chutes are arranged between any adjacent claw chutes on the same mounting position;
the second installation mechanism comprises a plurality of claw grooves and at least one positioning groove, the claw grooves are respectively and uniformly distributed along the circumferential direction of the transmission sleeve or the clamping sleeve, and the positioning grooves are formed between the claw grooves which are randomly adjacent to each other.
4. The spatial arrangement structure of driving mechanism according to claim 3, wherein said transmission latch mechanism and said holding latch mechanism respectively comprise:
the pin claw sleeve is sleeved outside the second mounting mechanism, the top end of the pin claw sleeve is connected with the transmission hydraulic cylinder or the clamping hydraulic cylinder, and the bottom end of the pin claw sleeve is in linkage connection with the second mounting mechanism;
a pawl body pivotally connected to the second mounting mechanism and rotatably movable through the first mounting mechanism to grasp and control movement of the control rod drive shaft;
and one end of the positioning block is fixedly arranged on the second mounting mechanism, and the other end of the positioning block extends into the first mounting mechanism.
5. The spatial arrangement structure of driving mechanisms according to claim 4, wherein said first mounting mechanism comprises:
the claw sliding grooves are used for allowing the claw bodies to penetrate through, and are uniformly distributed along the circumferential direction of the cylinder body; and the number of the first and second groups,
and the positioning sliding grooves are used for the positioning blocks to stretch into, and the positioning sliding grooves are arranged between any adjacent claw sliding grooves.
6. The spatial arrangement structure of driving mechanism according to claim 5, wherein said second mounting mechanism comprises:
the claw grooves are uniformly distributed along the circumferential direction of the transfer sleeve or the clamping sleeve respectively, each claw groove is correspondingly arranged on the outer side of each corresponding claw sliding groove respectively, one end of each claw groove is connected with the claw body in a pivoting manner, and the other end of each claw groove is linked with the pin claw sleeve respectively; and the number of the first and second groups,
at least one positioning groove is formed between any adjacent claw sliding grooves and correspondingly arranged on the outer sides of the corresponding positioning sliding grooves, one end of each positioning block is fixedly connected into the corresponding positioning groove, and the other end of each positioning block extends into the corresponding positioning sliding groove.
7. The spatial arrangement structure of the driving mechanism according to claim 5, wherein the length direction of the pawl slide groove and the length direction of the positioning slide groove are both arranged in parallel with the axial direction of the cylinder.
8. The spatial layout structure of the driving mechanism according to claim 4, wherein the holding steps comprise a first holding step and a second holding step configured on the cylinder, and the first holding step and the second holding step are configured between a first installation position and a second installation position from top to bottom;
the clamping hydraulic cylinder is arranged on the first clamping step;
the clamping pin claw mechanism further comprises a spring frame and a spring body, the spring frame is mounted on the second clamping step, and the spring body is elastically mounted between the spring frame and the clamping sleeve.
9. The spatial layout structure of the driving mechanism according to any one of claims 1 to 8, further comprising a gutter for embedding the water conduit, wherein the outer walls of the lifting hydraulic cylinder, the transfer hydraulic cylinder and the clamping hydraulic cylinder are respectively provided with the gutter.
10. A built-in crdm having a spatial arrangement of the drive mechanism as set forth in any one of claims 1 to 9; the built-in control rod driving mechanism comprises a lifting hydraulic cylinder, a transmission pin claw mechanism, a clamping hydraulic cylinder and a clamping pin claw mechanism which are sleeved outside the inner sleeve from top to bottom;
the transmission pin claw mechanism is connected with the transmission hydraulic cylinder and is connected with the lifting hydraulic cylinder through a transmission sleeve;
the clamping pin claw mechanism is respectively connected with the clamping sleeve and the clamping hydraulic cylinder;
the transfer pin jaw mechanism and the clamping pin jaw mechanism are respectively used for grabbing the control rod driving shaft and driving the control rod driving shaft to move.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010761837.3A CN112017795B (en) | 2020-07-31 | 2020-07-31 | Spatial layout structure of driving mechanism and built-in control rod driving mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010761837.3A CN112017795B (en) | 2020-07-31 | 2020-07-31 | Spatial layout structure of driving mechanism and built-in control rod driving mechanism |
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| CN112017795B true CN112017795B (en) | 2022-10-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003057377A (en) * | 2001-08-09 | 2003-02-26 | Tokyo Electric Power Co Inc:The | Control rod driving mechanism |
| CN1442863A (en) * | 2002-03-29 | 2003-09-17 | 清华大学 | Nuclear reactor control rod hydraulic driving system |
| CN102568620A (en) * | 2011-12-27 | 2012-07-11 | 华北电力大学 | Reactor control rod driving mechanism |
| CN208507203U (en) * | 2018-03-13 | 2019-02-15 | 中广核研究院有限公司 | A kind of claw device applied to control rod drive mechanism |
-
2020
- 2020-07-31 CN CN202010761837.3A patent/CN112017795B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003057377A (en) * | 2001-08-09 | 2003-02-26 | Tokyo Electric Power Co Inc:The | Control rod driving mechanism |
| CN1442863A (en) * | 2002-03-29 | 2003-09-17 | 清华大学 | Nuclear reactor control rod hydraulic driving system |
| CN102568620A (en) * | 2011-12-27 | 2012-07-11 | 华北电力大学 | Reactor control rod driving mechanism |
| CN208507203U (en) * | 2018-03-13 | 2019-02-15 | 中广核研究院有限公司 | A kind of claw device applied to control rod drive mechanism |
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| CN112017795A (en) | 2020-12-01 |
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