T1 periodic test interface device of reactor protection system

Abstract

The invention discloses a T1 periodic test interface device of a reactor protection system, and relates to the technical field of interface tests. Comprising a fixing frame, a vertical plate arranged on one side of the fixing frame, a second protruding block arranged on the inner side of the fixing frame, a first connecting rod arranged at the end of the second protruding block, a second connecting rod arranged at the end of the first connecting rod and a rotary knob arranged at the end of the second connecting rod. And the second limiting plate is arranged on the end face of the vertical plate. The PIPS terminal unit has the beneficial effects that a plurality of groups of connecting wires at the end part of the PIPS terminal unit can be arranged through the arranged wire pipes, so that the orderliness of lines in the cabinet main body is ensured; the arranged clamping unit can quickly clamp and fix a wire pipe, and the stability of a circuit is ensured; the installation unit is matched with the PIPS terminal unit, so that an operator can conveniently install the PIPS terminal unit on the inner side of the cabinet main body, and the device is simple in structure and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of interface testing technology, and in particular to a T1 periodic test interface device for a reactor protection system. Background Technology

[0002] To effectively detect faults and check equipment operability, nuclear power plant safety-grade DCS reactor protection systems (RRP) undergo periodic testing to meet design reliability requirements. Simultaneously, the periodic testing function should not interfere with the normal operation of the RRP system's protection functions. The design of periodic testing should ensure that it is conducted during normal nuclear power plant operation or during reactor shutdown and refueling, and should not affect the normal operation of the nuclear power plant. Analysis of the traditional T1 test scheme and interface design for nuclear power plant safety-grade DCS systems reveals that existing interface devices are relatively inconvenient to use.

[0003] In fault detection and equipment inspection, the required equipment and control systems are mostly installed inside corresponding cabinets; the various devices are connected by connecting cables; due to the large number of equipment wires, in order to ensure a neater wiring layout and facilitate later maintenance by the staff, the wiring needs to be organized and fixed; at the same time, the installation process is relatively inconvenient for the staff, affecting their work efficiency. Summary of the Invention

[0004] In view of the problems existing in the above or prior art, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a T1 periodic test interface device for a reactor protection system, which solves the problems of inconvenient installation of existing terminal units and inconvenient fixing of existing lines.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a T1 periodic test interface device for a reactor protection system, comprising a cabinet body; the cabinet body includes a placement rack disposed therein;

[0007] The installation unit includes a fixing frame, an upright plate disposed on one side of the fixing frame, a second protrusion disposed on the inner side of the fixing frame, a first connecting rod disposed at the end of the second protrusion, a second connecting rod disposed at the end of the first connecting rod, a knob disposed at the end of the second connecting rod, and a second limiting plate disposed on the end face of the upright plate.

[0008] The clamping unit includes a clamping assembly, a limiting assembly, and a transmission assembly; the transmission assembly is disposed at the end of the clamping assembly, and the end of the limiting assembly is disposed inside the transmission assembly;

[0009] The fixing frame is fixedly installed at the bottom of the placement frame; the second protrusion is hinged to one end of the first connecting rod and rotates; the end of the second connecting rod is hinged to the other end of the first connecting rod and rotates.

[0010] In a preferred embodiment of the T1 periodic test interface device for the reactor protection system of the present invention, the placement frame includes a third slot disposed therein; the position of the third slot corresponds to the position of the fixing frame.

[0011] The fixing frame includes a fifth through slot at its bottom and a sixth through slot on one side of the fifth through slot; the fixing frame has a hollow internal structure.

[0012] As a preferred embodiment of the T1 periodic test interface device of the reactor protection system of the present invention, the second protrusion includes a first hinge seat disposed at the bottom, a second guide post disposed on one side of the first hinge seat, and a second spring disposed on the outside of the second guide post.

[0013] The second protrusion engages with the third slot; the second protrusion penetrates the third slot and extends to its outer side;

[0014] The second guide post passes through the sixth through groove and extends to its outer side.

[0015] As a preferred embodiment of the T1 periodic test interface device of the reactor protection system described in this invention, the first connecting rod includes a second hinge end disposed at one end, a second torsion spring disposed outside the second hinge end, and a third hinge seat disposed at the other end of the first connecting rod.

[0016] The second hinge end engages with the first hinge seat; the second torsion spring drives the first connecting rod to return to its original position; the second hinge end fits against the side wall of the first hinge seat.

[0017] As a preferred embodiment of the T1 periodic test interface device of the reactor protection system of the present invention, the second connecting rod includes a third hinge end disposed at one end thereof, and a disk disposed at the other end of the second connecting rod; the disk includes a notch disposed inside it.

[0018] The knob includes a second cavity disposed therein; the second cavity includes a locking block disposed therein;

[0019] The knob is fitted onto the outside of the disc; the locking block moves along the trajectory of the notch.

[0020] As a preferred embodiment of the T1 periodic test interface device of the reactor protection system of the present invention, the knob further includes an arc-shaped groove disposed on its side wall; the number of the second limiting plates is two sets; the two sets of the second limiting plates are symmetrically arranged on both sides of the knob;

[0021] The end of the second limiting plate is engaged with the inner side of the arc-shaped groove; the second limiting plate can limit the knob.

[0022] As a preferred embodiment of the T1 periodic test interface device of the reactor protection system of the present invention, the device includes: a conduit; the conduit is disposed inside the clamping unit;

[0023] PIPS terminal unit; the PIPS terminal unit includes a PIPS signal preprocessing module and mounting plates disposed on both sides of the PIPS signal preprocessing module; the mounting plate includes a second through hole formed therein;

[0024] The PIPS signal preprocessing module is equipped with an active isolation relay. Its function is to change the signal connection mode by flipping the contacts. The relay has normally closed contact A and normally open contact B. Contact A, which is the normally closed contact, is connected to the local field signal, while normally open contact B is connected to the test signal. The flipping of the relay contacts is controlled by the periodic automatic test device.

[0025] The backplane of the PIPS signal preprocessing module is equipped with a terminal unit and an input conversion module, which serve as the connection interface for the T1 periodic test device. After the test signal is isolated and distributed by the isolator in the PIP unit, it is sent to the AI ​​module of the safety-level DCS control station, and finally sent to the MTS display of the engineer station through the RTC of the protection group control station.

[0026] As a preferred embodiment of the T1 periodic test interface device of the reactor protection system of the present invention, the clamping assembly includes a support frame, a connecting shaft disposed inside the support frame, arc-shaped blocks disposed at both ends of the connecting shaft, a clamping plate disposed on one side of the arc-shaped blocks, an annular member disposed on one side of the clamping plate, and a circular hole disposed at the end of the connecting shaft.

[0027] The limiting assembly includes a second hinge seat, a pawl disposed inside the second hinge seat, a torsion spring disposed outside the pawl, a third connecting rod disposed on the outer wall of the second hinge seat, and a button disposed at the end of the third connecting rod;

[0028] The transmission assembly includes a connecting column, a limiting column disposed on the side wall of the connecting column, and a third limiting plate disposed at the end of the connecting column;

[0029] The connecting post is disposed inside the circular hole; the pawl is disposed inside the annular part; the end of the third limiting plate passes through the button and extends into its interior.

[0030] As a preferred embodiment of the T1 periodic test interface device of the reactor protection system of the present invention, the support frame includes a first through groove disposed on its inner side, a second through groove disposed on one side of the first through groove, a bushing disposed on the inner wall of the support frame, a third through groove disposed on the side wall of the support frame, and a fourth through groove disposed on one side of the third through groove.

[0031] One end of the connecting shaft mates with the bushing; the other end of the connecting shaft passes through the third through groove and extends to its outer side;

[0032] The position of the first through groove corresponds to the clamping plate; the position of the second through groove corresponds to the arc-shaped block;

[0033] The annular component includes a circular ring and limiting teeth disposed on the inner side of the circular ring; the number of limiting teeth is multiple sets, and the multiple sets of limiting teeth are distributed at equal intervals along the inner wall of the circular ring;

[0034] The ring and the arc-shaped block are welded and fixed together; the pawl is adapted to the gap formed by the adjacent limiting teeth;

[0035] The second hinge seat includes a protrusion disposed on its inner side;

[0036] The pawl rotates inside the second hinge seat; the third connecting rod includes a limiting block disposed on its outer wall.

[0037] In a preferred embodiment of the T1 periodic test interface device of the reactor protection system of the present invention, the third connecting rod is welded and fixed to the button; the button includes a cavity disposed therein.

[0038] The torsion spring uses its rebound force to keep the sidewall of the pawl pressed tightly against the end of the protrusion;

[0039] The end of the pawl contacts the sidewall of the limiting tooth;

[0040] The circular hole includes a slide rail disposed on its side wall;

[0041] The limiting post penetrates the slide rail and extends to its outer side; the limiting post is adapted to the slide rail;

[0042] The third limiting plate includes a fixing plate disposed at its end; the fixing plate is adapted to the cavity;

[0043] The third connecting rod is adapted to the third through groove; the third connecting rod passes through the third through groove and extends to its outer side;

[0044] The connecting shaft passes through the fourth through groove and extends to its outer side; the third through groove is connected to the fourth through groove.

[0045] The beneficial effects of this invention are as follows: the conduit can organize multiple sets of connecting wires at the end of the PIPS terminal unit, ensuring the neatness of the wiring inside the cabinet; the clamping unit can quickly clamp and fix the conduit, ensuring the stability of the wiring; the installation unit cooperates with the PIPS terminal unit, making it easy for operators to install the PIPS terminal unit inside the cabinet, and the device has a simple structure and is easy to operate. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the T1 periodic test interface device for the reactor protection system.

[0048] Figure 2 A cross-sectional view of the main cabinet of the T1 periodic test interface device for the reactor protection system.

[0049] Figure 3 This is a schematic diagram of the exploded structure of the clamping unit of the T1 periodic test interface device for the reactor protection system.

[0050] Figure 4 A partial cross-sectional view of the clamping unit of the T1 periodic test interface device for the reactor protection system.

[0051] Figure 5 A partial cross-sectional view of the clamping assembly of the T1 periodic test interface device for the reactor protection system.

[0052] Figure 6 A schematic diagram of the end contraction structure of the second protrusion of the T1 periodic test interface device for the reactor protection system.

[0053] Figure 7 A schematic diagram of the end-ejection structure of the second protrusion block of the T1 periodic test interface device for the reactor protection system.

[0054] Figure 8This is a schematic diagram of the exploded structure of the installation unit for the T1 periodic test interface device of the reactor protection system.

[0055] Figure 9 A schematic diagram of the clamping unit structure of the T1 periodic test interface device for the reactor protection system.

[0056] Figure 10 A schematic diagram of the T1 periodic test interface device of the reactor protection system. Detailed Implementation

[0057] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0058] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0059] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0060] Example 1

[0061] Reference Figures 1-5 This is the first embodiment of the present invention, which provides a T1 periodic test interface device for a reactor protection system, comprising: a cabinet body 100; the cabinet body 100 includes a placement rack 100a disposed inside it; an installation unit 500, including a fixing frame 501, a vertical plate 502 disposed on one side of the fixing frame 501, a second protrusion 503 disposed on the inner side of the fixing frame 501, a first connecting rod 504 disposed at the end of the second protrusion 503, a second connecting rod 505 disposed at the end of the first connecting rod 504, a knob 506 disposed at the end of the second connecting rod 505, and a second limiting plate 507 disposed on the end face of the vertical plate 502; the fixing frame 501 is fixedly disposed at the bottom of the placement rack 100a; the second protrusion 503 is hinged to one end of the first connecting rod 504 and rotates; the end of the second connecting rod 505 is hinged to the other end of the first connecting rod 504 and rotates.

[0062] Preferably, multiple sets of placement racks 100a are provided, and the placement racks 100a are arranged in pairs opposite each other inside the cabinet body 100; this better ensures that the placement racks 100a can support the PIPS terminal units 600 and that the PIPS terminal units 600 can be arranged in layers inside the cabinet body 100; the fixed frame 501 provides support for the second protrusion 503, the upright plate 502 provides good support for the second connecting rod 505, and the first connecting rod 504 connects the second connecting rod 505 and the second protrusion 503, thus ensuring that the movement of the second connecting rod 505 can drive the movement of the second protrusion 503; the two ends of the first connecting rod 504 are hinged to the second protrusion 503 and the second connecting rod 505, respectively; the knob 506 cooperates with the second limiting plate 507 to fix the position of the second connecting rod 505, thereby fixing the position of the second protrusion 503.

[0063] The clamping unit N includes a clamping assembly 200, a limiting assembly 300, and a transmission assembly 400; the transmission assembly 400 is disposed at the end of the clamping assembly 200, and the end of the limiting assembly 300 is disposed inside the transmission assembly 400.

[0064] Preferably, multiple sets of clamping units N are provided, with two sets of clamping units N arranged opposite each other. The clamping units N are equidistantly distributed along the vertical direction of the PIPS terminal unit 600, and the provided conduit 700 can organize the multiple sets of lines connected to the end of the PIPS terminal unit 600, so that the lines are neatly arranged, which makes it easier for staff to perform regular maintenance on the equipment. The clamping units N can clamp and fix the conduit 700, thereby better ensuring that the lines are fixed inside the cabinet body 100.

[0065] In use, when the operator needs to install the PIPS terminal unit 600 inside the cabinet body 100, the PIPS terminal unit 600 is placed on the placement rack 100a, and then pushed to allow it to enter the cabinet body 100. As the PIPS terminal unit 600 is pushed, it presses against the second protrusion 503. As the second protrusion 503 moves downward, it moves the first connecting rod 504, which in turn moves the second connecting rod 505. After the second protrusion 503 moves to the position corresponding to the second through hole 602a, the second protrusion 503 resets and passes through the outside of the second through hole 602a. The position of the mounting plate 602 can be limited by the second protrusion 503, thereby ensuring that the PIPS terminal unit 600 is stably installed inside the cabinet body 100. The lines connected to each group at the end of the PIPS signal preprocessing module 601 are passed through the conduit 700, and the lines can be arranged inside the conduit 700. Then, the clamping unit N is used to clamp and fix the conduit 700, thereby achieving a more stable arrangement of the lines.

[0066] In summary, the clamping unit N can be used to organize and arrange various lines, making it easier for staff to inspect and maintain them; the installation unit 500 can easily complete the installation and fixation of the PIPS terminal unit 600, so that the PIPS terminal unit 600 is stably installed and fixed inside the cabinet body 100. The device has a simple structure, is easy to operate, and improves the flexibility of the device.

[0067] Example 2

[0068] Reference Figures 1-10 This is the second embodiment of the present invention, which differs from the first embodiment in that it further includes: In the previous embodiment, the T1 periodic test interface device of the reactor protection system includes a placement frame 100a including a third slot 100a-1 disposed therein; the position of the third slot 100a-1 corresponds to the position of the fixing frame 501; the fixing frame 501 includes a fifth through slot 501a disposed at its bottom and a sixth through slot 501b disposed on one side of the fifth through slot 501a; the fixing frame 501 has a hollow internal structure.

[0069] Preferably, the placement rack 100a is fixedly connected to the fixing rack 501, the upright plate 502 is located on one side of the fixing rack 501, and the upright plate 502 is also fixedly connected to the placement rack 100a; the fixing rack 501 has a structure with an open top and a hollow interior, and the position of the fixing rack 501 corresponds to the position of the third slot 101a-1.

[0070] Furthermore, the second protrusion 503 includes a first hinge seat 503a disposed at the bottom, a second guide post 503b disposed on one side of the first hinge seat 503a, and a second spring 503c disposed on the outside of the second guide post 503b; the second protrusion 503 cooperates with the third slot 100a-1; the second protrusion 503 passes through the third slot 100a-1 and extends to its outside; the second guide post 503b passes through the sixth through slot 501b and extends to its outside.

[0071] Preferably, the first hinge seat 503a is located at the end of the second protrusion 503, and the second guide post 503b is located on one side of the bottom of the second protrusion 503. The second guide post 503b is welded and fixed to the second protrusion 503. The second guide post 503b guides the second spring 503c, ensuring that the second spring 503c does not exceed its elastic deformation range during compression. The second guide post 503b passes through the sixth through groove 501b and extends to its outer side. The diameter of the second spring 503c is larger than the diameter of the sixth through groove 501b. During the compression of the second spring 503c, the lower end of the second spring 503c contacts the inner wall of the fixing frame 501. The second guide post 503b moves along the vertical direction of the sixth through groove 501b. The second protrusion 503 moves inside the third slot 100a-1, allowing the second protrusion 503 to pass through the third slot 100a-1 and extend to its outer side.

[0072] Furthermore, the first connecting rod 504 includes a second hinge end 504a disposed at one end, a second torsion spring 504b disposed outside the second hinge end 504a, and a third hinge seat 504c disposed at the other end of the first connecting rod 504; the second hinge end 504a cooperates with the first hinge seat 503a; the second torsion spring 504b drives the first connecting rod 504 to reset; so that the second hinge end 504a fits against the side wall of the first hinge seat 503a.

[0073] Preferably, the second hinge end 504a and the first hinge seat 503a cooperate with each other, so that the first connecting rod 504 will only rotate along one side of the second protrusion 503, ensuring the flipping trajectory of the first connecting rod 504; the second torsion spring 504b can drive the first connecting rod 504 to reset, so that the first connecting rod 504 and the second protrusion 503 can be in a vertical state; the rebound force of the second torsion spring 504b can drive the first connecting rod 504 to reset; the third hinge seat 504c and the third hinge end 505a cooperate to rotate, and as the second protrusion 503 moves downward, it can drive the first connecting rod 504 to flip, thereby driving the second connecting rod 505 to move.

[0074] Furthermore, the second connecting rod 505 includes a third hinge end 505a disposed at one end thereof, and a disc 505b disposed at the other end thereof; the disc 505b includes a notch 505b-1 disposed therein; the knob 506 includes a second cavity 506a disposed therein; the second cavity 506a includes a locking block 506a-1 disposed therein; the knob 506 is sleeved on the outside of the disc 505b; the locking block 506a-1 moves along the trajectory direction of the notch 505b-1.

[0075] Preferably, the first connecting rod 504 moves along the trajectory of the fifth through groove 501a, and the fifth through groove 501a is located on the trajectory of the movement provided by the rotation of the first connecting rod 504; the second connecting rod 505 passes through the second circular hole 502a and extends to its outer side, and the second circular hole 502a serves to guide the second connecting rod 505, so that the second connecting rod 505 can move in the horizontal direction; the disk 505b is fixedly connected to the end of the second connecting rod 505; the knob 506 rotates outside the disk 505b; the disk 505b rotates inside the second cavity 506a, and the notch 505b-1 cooperates with the locking block 506a-1 to limit the trajectory of the rotation of the knob 506.

[0076] Furthermore, the knob 506 also includes an arc-shaped groove 506b disposed on its side wall; there are two sets of second limiting plates 507; the two sets of second limiting plates 507 are symmetrically arranged on both sides of the knob 506; the ends of the second limiting plates 507 are inserted into the inner side of the arc-shaped groove 506b; the second limiting plates 507 can limit the knob 506.

[0077] Preferably, the two sets of arc-shaped grooves 506b are symmetrically arranged on both sides of the outer wall of the knob 506; and the end of the second limiting plate 507 can be clamped inside the arc-shaped groove 506b; the knob 506 can be fixed by the cooperation of the two sets of second limiting plates 507; rotating the knob 506 causes the locking block 506a-1 to rotate, and 506b can be offset from the position of the second limiting plate 507; thereby facilitating the reset of the second protrusion 503, driving the second connecting rod 505 to reset, and making it easier for the staff to install the PIPS terminal unit 600 again;

[0078] Furthermore, a conduit 700 is provided inside the clamping unit N; a PIPS terminal unit 600 is provided; the PIPS terminal unit 600 includes a PIPS signal preprocessing module 601 and mounting plates 602 provided on both sides of the PIPS signal preprocessing module 601; the mounting plate 602 includes a second through hole 602a opened inside it; an active isolation relay is provided inside the PIPS signal preprocessing module; its function is to change the signal connection mode by flipping the contacts. The relay has normally closed contacts A and normally open contacts B, where contact A, i.e., normally closed contacts, maintains the connection with the local field signal, and normally open contact B is connected to the test signal. The flipping of the relay contacts is controlled by the periodic test automatic test device; a terminal unit and an input conversion module are provided on the back panel of the PIPS signal preprocessing module as the connection interface of the T1 periodic test device; after the test signal is isolated and distributed by the isolator in the PIP unit, it is sent to the AI ​​module of the safety-level DCS control station, and finally sent to the MTS display of the engineer station through the RTC of the protection group control station.

[0079] Preferably, all T1 test interfaces are located in the PIPS terminal unit for convenient centralized management; the automatic test device allows for convenient centralized management and distribution of T1 test control signals and test signals; whether performing T1 periodic tests on analog or digital channels, the control signal can change the relay contacts to switch the local signal terminal and test terminal path, making T1 test operation convenient and automated; for different test port signal paths in T1 tests, interface switching can be automated through the periodic test device script, eliminating the need for injecting signals one by one, making operation simple and safe;

[0080] The optimized interface scheme involves designing an active isolation relay in the signal instrument preprocessing unit (PIPS). Its function is to change the signal connection method by flipping the contacts. The relay has normally closed A contacts and normally open B contacts. Contact A, the normally closed contact, maintains the connection with the local field signal, while normally open contact B is connected to the test signal. The flipping of the relay contacts is controlled by the periodic automatic test device.

[0081] The PIPS signal preprocessing module, connected to the terminal unit and input adapter module on the backplane, serves as the connection interface for the T1 periodic test device. After isolation and distribution by the isolator in the PIP unit, the test signal is sent to the AI ​​module of the safety-grade DCS control station, and finally transmitted to the engineer station MTS display via the RTC of the protection group I / II / III / IV control station or the communication transmission module TU.

[0082] The specific operation involves forcing the T1 test control signal on the automatic testing device, disconnecting contact A (i.e., disconnecting the local sensor signal), closing contact B (closed the normally open contact), injecting a signal into the T1 test terminal, and observing the corresponding input signal value on the MTS.

[0083] For digital input signals, when the test terminal is shorted or a high level of 24V is injected, the value on the MTS is "1". When the test terminal is disconnected or a low level of 0V is injected, the value on the MTS is "0". This indicates that the digital input channel is functioning normally.

[0084] For analog signals, inject engineering values ​​into the test terminals. Typically, inject electrical values ​​corresponding to 0%, 25%, 50%, 75%, and 100% of the engineering range, and the electrical signal corresponding to 50% of the range. The value on the MTS is within the allowable error range of ±0.50% of the engineering range, which can be used to verify the accuracy and availability of the analog input channel.

[0085] In use, the operator pushes the PIPS terminal unit 600, and the mounting plates 602 on both sides of the PIPS terminal unit 600 compress the second protrusion 503. As the second protrusion 503 continuously squeezes the PIPS terminal unit 600, the end of the second protrusion 503 moves to the base of the mounting plate 602. Then, as the PIPS terminal unit 600 continues to move, the end of the second protrusion 503 is located inside the second through hole 602a. The rebound force of the second spring 503c drives the second protrusion 503 to move, causing the second protrusion 503 to move out of the second through hole 602a. The second protrusion 503 can limit the PIPS terminal unit 600, thereby ensuring the PIPS terminal unit 600 is in position. The terminal unit 600 is mounted and fixed above the placement bracket 100a. When the PIPS terminal unit 600 needs to be disassembled, the knob 506 is pushed. The knob 506 drives the second connecting rod 505 to move. The movement of the second connecting rod 505 causes the first connecting rod 504 to rotate at an angle. While the first connecting rod 504 rotates, it also drives the second protrusion 503 to move. This causes the second protrusion 503 to move and compress the second spring 503c. The second spring 503c is gradually pressed against the outside of the second guide post 503b, causing the end of the second protrusion 503 to move to a position parallel to the end of the second through hole 602a. At this point, the second connecting rod 505 needs to be pushed forward again so that the end of the second protrusion 503 is submerged. To the inner side of the second through hole 602a; as the arc groove 506b aligns with the position of the second limiting plate 507; during the movement, the knob 506 presses against the second limiting plate 507, causing the second limiting plate 507 to flip along its arc trajectory. Under the rebound force of the second limiting plate 507, the end of the second limiting plate 507 is inserted into the inner side of the arc groove 506b, thereby fixing the position of the second protrusion 503; then it is convenient for the staff to remove the PIPS terminal unit 600; when it is necessary to reset the second protrusion 503, the knob 506 needs to be pushed further, causing the second limiting plate 507 to move along the inner wall of the arc groove 506b, so that the second limiting plate 507 moves to the knob 506. After rotating the knob 506, the locking block 506a-1 rotates inside the notch 505b-1. When the position of the arc groove 506b shifts from the position of the second limiting plate 507, the position of the locking block 506a-1 is limited by the notch 505b-1, thus better fixing the knob 506 at the end of the second connecting rod 505. When the second limiting plate 507 no longer corresponds to the position of the arc groove 506b, and the force of pressing the knob 506 is released, the second spring 503c is no longer under pressure. The second spring 503c resets, driving the second protrusion 503 to reset, thus resetting the knob 506, ensuring that the knob 506 returns to its original position, facilitating the next installation of the PIPS terminal unit 600.

[0086] In summary, the installation unit 500 allows for better mounting of the PIPS terminal unit 600 on the mounting rack 100a, facilitating operation by staff. It also enables quick installation and fixation of the PIPS terminal unit 600, and the simple structure of the device improves work efficiency to some extent.

[0087] Example 3

[0088] Reference Figures 1 to 8 This is the third embodiment of the present invention, which differs from the previous two embodiments in that it includes a clamping unit 200, comprising a support frame 201, a connecting shaft 202 disposed inside the support frame 201, arc-shaped blocks 203 disposed at both ends of the connecting shaft 202, a clamping plate 204 disposed on one side of the arc-shaped blocks 203, an annular member 205 disposed on one side of the clamping plate 204, and a circular hole 206 disposed at the end of the connecting shaft 202.

[0089] Preferably, the support frame 201 can support the conduit 700, allowing the conduit 700 to be positioned inside the support frame 201. Two sets of connecting shafts 202 are provided, symmetrically arranged on both sides inside the support frame 201. Each set of connecting shafts 202 has two symmetrically arranged arc-shaped blocks 203 connected to its outer wall. A clamping plate 204 is provided on the inner side of the two sets of arc-shaped blocks 203 at the middle position of the support frame 201. One end of the support frame 201 rotates along the axis of the bushing 201c, and the annular component 205 is fixedly connected to the arc-shaped blocks 203. The arc-shaped blocks 203 and the clamping plate 204 rotate in the same direction.

[0090] Furthermore, the limiting assembly 300 includes a hinge seat 301, a pawl 302 disposed inside the hinge seat 301, a torsion spring 303 disposed outside the pawl 302, a connecting rod 304 disposed on the outer wall of the hinge seat 301, and a button 305 disposed at the end of the connecting rod 304; the transmission assembly 400 includes a moving rod 401, a limiting post 402 disposed on the side wall of the moving rod 401, and a limiting plate 403 disposed at the end of the moving rod 401.

[0091] The moving rod 401 is disposed inside the circular hole 206; the pawl 302 is disposed inside the annular part 205; the end of the limiting plate 403 passes through the button 305 and extends into it.

[0092] Preferably, the hinge seat 301 supports and limits the pawl 302. The pawl 302 rotates along the shaft hole inside the hinge seat 301. The pawl 302, limited by the hinge seat 301, prevents it from overturning at an excessive angle under the reverse force of the torsion spring 303, thus ensuring better engagement between the pawl 302 and the annular component 205 for locking the clamping plate 204. The connecting rod 304 connects the hinge seat 301 to the ring. The button 305 is connected to the limiting plate 403, which slides along the inside of the button 305. The moving rod 401 is located inside the circular hole 206. Rotation of the connecting shaft 202 moves the moving rod 401 in a straight line, causing the moving rod 401 to move, which in turn moves the button 305, thus resetting the pawl 302.

[0093] During use, the operator places the conduit 700 inside the support frame 201. During placement, the outer wall of the conduit 700 presses against the arc-shaped block 203, causing it to flip along the axis of the connecting shaft 202. This flipping of the arc-shaped block 203 causes the clamping plate 204 to flip as well, covering the outside of the conduit 700. The inner wall of the clamping plate 204 is pressed tightly against the inner wall of the conduit 700. As the connecting shaft 202 rotates, it causes the annular component 205 to rotate. The rotation of the annular component 205, in conjunction with the pawl 302, effectively prevents the annular component 205 from flipping, ensuring that the clamping plate 204 can hold the conduit 700. When it is necessary to remove the conduit 700, the button 305 is pulled. The button 305 moves the hinge seat 301, causing the hinge seat 301 to... The pawl 302, located on the inner side, moves to one side of the annular component 205. The pawl 302 is no longer in contact with the annular component 205. At this point, lifting the conduit 700 allows it to move upwards, pushing the clamping plate 204 to open and flip. After the conduit 700 is removed from the inside of the support frame 201, the clamping plate 204 continues to rotate. This rotation causes the connecting shaft 202 to rotate, which in turn causes the limiting post 402 to move along the inner wall of the slide rail 206a. This causes the moving rod 401 to move, which in turn moves the button 305. As the clamping plate 204 continues to rotate, the pawl 302 moves, eventually reaching a position corresponding to the annular component 205. This facilitates the next engagement of the pawl 302 with the annular component 205, better locking the clamping plate 204.

[0094] Furthermore, the support frame 201 includes a first through groove 201a disposed on its inner side, a second through groove 201b disposed on one side of the first through groove 201a, a bushing 201c disposed on the inner wall of the support frame 201, a third through groove 201d disposed on the side wall of the support frame 201, and a fourth through groove 201e disposed on one side of the third through groove 201d; one end of the connecting shaft 202 cooperates with the bushing 201c; the other end of the connecting shaft 202 passes through the third through groove 201d and extends to.

[0095] Preferably, the first through groove 201a is located in the center of the support frame 201, and the second through groove 201b is symmetrically arranged at both ends of the first through groove 201a; the bushing 201c can support the connecting shaft 202, and one end of the connecting shaft 202 passes through the support frame 201 and extends to its outer side; the other end of the connecting shaft 202 is located inside the bushing 201c; the third through groove 201d can facilitate the connecting rod 304 to pass through to the outer side of the support frame 201; the end of the connecting shaft 202 that passes through the support frame 201 has a round hole 206 inside; the fourth through groove 201e cooperates with the connecting shaft 202, and the connecting shaft 202 passes through the fourth through groove 201e and extends to its outer side.

[0096] Furthermore, the annular component 205 includes a circular ring 205a and limiting teeth 205b disposed on the inner side of the circular ring 205a; the number of limiting teeth 205b is multiple sets, and the multiple sets of limiting teeth 205b are equidistantly distributed along the inner quarter position of the circular ring 205a; the circular ring 205a is welded and fixed to the arc-shaped block 203; the pawl 302 is adapted to the gap formed by the adjacent limiting teeth 205b.

[0097] Preferably, the circular ring 205a is fixedly connected to the arc-shaped block 203, and the circular ring 205a is positioned at one end near the circular hole 206; multiple sets of limiting teeth 205b are fixedly positioned on the inner wall of the circular ring 205a, and the gap formed between adjacent limiting teeth 205b cooperates with the pawl 302. The pawl 302 contacts the limiting teeth 205b to form a cooperation, thereby completing the limiting of the clamping plate 204; the arc-shaped block 203 is a curved arc structure; multiple sets of limiting teeth 205b are equidistantly distributed along a local position of the inner wall of the circular ring 205a; the interior of the circular ring 205a is divided into a limiting area and a smooth area.

[0098] Furthermore, the hinge seat 301 includes a protrusion 301a disposed on its inner side; the pawl 302 rotates inside the hinge seat 301; the connecting rod 304 includes a limiting block 304a disposed on its outer wall; the connecting rod 304 is welded and fixed to the button 305.

[0099] Button 305 includes a cavity 305a disposed therein; torsion spring 303 uses its rebound force to make the sidewall of pawl 302 press against the end of protrusion 301a; the end of pawl 302 contacts the sidewall of limiting tooth 205b.

[0100] Preferably, the hinge seat 301 is located inside the support frame 201, and the pawl 302 rotates along the inner wall of the shaft hole inside the hinge seat 301; a torsion spring 303 is provided on the outer side of the pawl 302 shaft; the torsion spring 303 can push the pawl 302 to reset, thereby ensuring that the pawl 302 can be positioned in the gap between adjacent limiting teeth 205b; the protrusion 301a can limit the pawl 302, thereby ensuring that the pawl 302 is at a certain appropriate angle during the flipping process, so that the pawl 302 can better cooperate with the limiting teeth 205b; the connecting rod 30 4. Button 305 can be connected to hinge seat 301. Button 305 is located on the outside of support frame 201. Limit block 304a cooperates with third through groove 201d. Limit block 304a moves along the inner wall of third through groove 201d, which can ensure that connecting rod 304 can perform horizontal reciprocating linear motion. Pulling button 305 can drive hinge seat 301 to move, so that pawl 302 set on the inner side of hinge seat 301 moves, thereby causing pawl 302 to be misaligned with limit tooth 205b, thereby achieving the purpose of unlocking clamping plate 204.

[0101] Furthermore, the circular hole 206 includes a slide 206a disposed on its side wall; the limiting post 402 passes through the slide 206a and extends to its outer side; the limiting post 402 is adapted to the slide 206a; the limiting plate 403 includes a fixing plate 403a disposed at its end; the fixing plate 403a is adapted to the cavity 305a.

[0102] Preferably, the circular hole 206 is located at the end of the connecting shaft 202; the slide 206a is located on the inner wall of the circular hole 206, and the slide 206a has a curved arc structure along the outer wall of the circular hole 206; the moving rod 401 is located on the inner side of the circular hole 206; the limiting post 402 passes through the slide 206a and extends to its outer side, and the rotation of the connecting shaft 202 can drive the limiting post 402 to rotate. As the connecting shaft 202 rotates, the limiting post 402 moves along the slide 206a. The inner wall of the moving rod 401 moves back and forth along the inner wall of the circular hole 206 through the cooperation between the limiting post 402 and the slide rail 206a; the limiting plate 403 can penetrate into the cavity 305a; and the fixing plate 403a slides inside the cavity 305a; the limiting plate 403 can connect the button 305 and the moving rod 401, so that the movement of the moving rod 401 can drive the movement of the button 305.

[0103] Furthermore, the connecting rod 304 is adapted to the third through groove 201d; the connecting rod 304 passes through the third through groove 201d and extends to its outer side; the connecting shaft 202 passes through the fourth through groove 201e and extends to its outer side; the third through groove 201d and the fourth through groove 201e are connected.

[0104] Preferably, the connecting rod 304 slides inside the third through groove 201d. By cooperating with the third through groove 201d, the connecting rod 304 can move along the inner wall of the third through groove 201d. The connecting rod 304 and the connecting shaft 202 are close to each other, which facilitates the pawl 302 and the ring member 205 to move closer together, so that the pawl 302 and the ring member 205 can cooperate with each other, thereby limiting the clamping plate 204.

[0105] In use, the operator places the conduit 700 between two sets of support frames 201, causing the outer wall of the conduit 700 to compress the arc-shaped block 203. As the arc-shaped block 203 is compressed by the conduit 700, it causes the connecting shaft 202 to rotate along the axis of the bushing 201c. The rotation of the connecting shaft 202 causes the clamping plate 204 to rotate, allowing the two sets of clamping plates 204 to move closer to each other, and the inner wall of the clamping plate 204 to fit tightly against the outer side of the conduit 700. During the rotation of the arc-shaped block 203, it drives the ring... When the annular component 205 rotates, it presses against the pawl 302, allowing the pawl 302 to change position. Under the action of the torsion spring 303, the pawl 302 can be reset. As the annular component 205 rotates, the pawl 302 can swing back and forth between the limiting teeth 205b. The pawl 302 can be locked between the limiting teeth 205b, which can effectively prevent the clamping plate 204 from reversing and opening after clamping and fixing, thus ensuring the stability of the clamping plate 204 clamping the conduit 700.

[0106] When unlocking is required, pull button 305 outward, causing button 305 to move connecting rod 304. The movement of button 305 can move hinge seat 301, which in turn moves pawl 302, ensuring that pawl 302 can be misaligned with limiting tooth 205b, thereby releasing the limitation on clamping plate 204. As button 305 is pulled outward, fixing plate 403a can be pressed against the inner wall of cavity 305a near connecting rod 304. Then, the conduit 700 is removed from inside support frame 201. As the conduit 700 moves upward, it can open clamping plate 204, thereby removing conduit 700 from between the two sets of clamping plates 204.

[0107] Then, the clamping plate 204 continues to rotate, causing it to open further outward. At this point, the smooth area inside the ring 205a corresponds to the position of the pawl 302. As the clamping plate 204 rotates, it drives the connecting shaft 202 to rotate. The rotation of the connecting shaft 202 drives the moving rod 401 at its end to rotate, causing the limiting post 402 to slide along the trajectory inside the slide rail 206a. The rotation of the connecting shaft 202 can drive the moving rod 401 to move. The moving rod 401 is located in the circular hole. The internal movement of the 206 moving rod 401 causes the limiting plate 403 to move, and the fixing plate 403a is tightly attached to the inner wall of the cavity 305a. As the moving rod 401 moves, it can drive the button 305 to move, which in turn drives the pawl 302 set on the inner side of the hinge seat 301 to move, thereby driving the pawl 302 to move to the smooth area on the inner side of the ring 205a, so that the pawl 302 engages with the limiting tooth 205b; the torsion spring 303 ensures that the pawl 305a is securely positioned. 2. The rotation angle is not too large, so that the pawl 302 can cooperate with the limiting tooth 205b; when the clamping plate 204 is rotated to the maximum extent, the position of the pawl 302 is reset; when installing parts, the clamping plates 204 come together; as the clamping plate 204 rotates, it drives the connecting shaft 202 to rotate, and the rotation of the connecting shaft 202 drives the moving rod 401 to move, so that the moving rod 401 can move towards the button 305, and the fixing plate 403a is located in the cavity 305a. During internal sliding, the fixed plate 403a can gradually move closer to the inner wall of the cavity 305a away from the end of the connecting rod 304. At this time, the movement of the moving rod 401 will not cause the button 305 to move, and the pawl 302 is still in the position of cooperating with the limiting tooth 205b. After the clamping plate 204 is rotated at a certain angle, the pawl 302 contacts the limiting tooth 205b, so that the pawl 302 can cooperate with the limiting tooth 205b, thereby completing the locking of the clamping plate 204.

[0108] In summary, during the installation of the conduit 700, the present invention compresses the arc-shaped block on the outer wall of the conduit 700, causing the clamping plate to flip and engage with the outside of the conduit 700, thereby clamping and fixing the conduit 700. Simultaneously, the opening action of the clamping plate drives the limiting unit to reset, facilitating the engagement between the pawl and the ring-shaped component, thus locking the clamping plate and ensuring the neat arrangement of the internal wiring of the cabinet body 100. This facilitates maintenance by staff, and the device is simpler and more convenient to use, reducing the workload of staff to a certain extent.

[0109] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A T1 periodic test interface device for a reactor protection system, characterized in that: include, The cabinet body (100) includes a rack (100a) disposed therein; The installation unit (500) includes a fixing frame (501), an upright plate (502) disposed on one side of the fixing frame (501), a second protrusion (503) disposed on the inner side of the fixing frame (501), a first connecting rod (504) disposed at the end of the second protrusion (503), a second connecting rod (505) disposed at the end of the first connecting rod (504), a knob (506) disposed at the end of the second connecting rod (505), and a second limiting plate (507) disposed on the end face of the upright plate (502). The clamping unit (N) includes a clamping assembly (200), a limiting assembly (300), and a transmission assembly (400); the transmission assembly (400) is disposed at the end of the clamping assembly (200), and the end of the limiting assembly (300) is disposed inside the transmission assembly (400); The fixing frame (501) is fixedly installed at the bottom of the placement frame (100a); the second protrusion (503) is hinged to one end of the first connecting rod (504); the end of the second connecting rod (505) is hinged to the other end of the first connecting rod (504).

2. The T1 periodic test interface device for the reactor protection system as described in claim 1, characterized in that: The placement rack (100a) includes a third slot (100a-1) disposed therein; the position of the third slot (100a-1) corresponds to the position of the fixing frame (501); The fixing frame (501) includes a fifth through groove (501a) disposed at its bottom and a sixth through groove (501b) disposed on one side of the fifth through groove (501a); the fixing frame (501) has a hollow structure inside. The upright plate (502) includes a second circular hole (502a) disposed therein; the second circular hole (502a) cooperates with the second connecting rod (505).

3. The T1 periodic test interface device for the reactor protection system as described in claim 2, characterized in that: The second protrusion (503) includes a first hinge seat (503a) disposed at the bottom, a second guide post (503b) disposed on one side of the first hinge seat (503a), and a second spring (503c) disposed on the outside of the second guide post (503b); The second protrusion (503) engages with the third slot (100a-1); the second protrusion (503) penetrates the third slot (100a-1) and extends to its outer side; The second guide post (503b) penetrates the sixth through groove (501b) and extends to its outer side.

4. The T1 periodic test interface device for the reactor protection system as described in claim 3, characterized in that: The first connecting rod (504) includes a second hinge end (504a) disposed at one end, a second torsion spring (504b) disposed outside the second hinge end (504a), and a third hinge seat (504c) disposed at the other end of the first connecting rod (504). The second hinge end (504a) cooperates with the first hinge seat (503a); the second torsion spring (504b) drives the first connecting rod (504) to reset; the second hinge end (504a) fits against the side wall of the first hinge seat (503a).

5. The T1 periodic test interface device for the reactor protection system as described in claim 4, characterized in that: The second connecting rod (505) includes a third hinge end (505a) disposed at one end thereof, and a disk (505b) disposed at the other end thereof; the disk (505b) includes a notch (505b-1) disposed therein. The knob (506) includes a second cavity (506a) disposed therein; the second cavity (506a) includes a locking block (506a-1) disposed therein; The knob (506) is fitted onto the outside of the disc (505b); the locking block (506a-1) moves along the trajectory of the notch (505b-1).

6. The T1 periodic test interface device for the reactor protection system as described in claim 5, characterized in that: The knob (506) also includes an arc-shaped groove (506b) disposed on its side wall; there are two sets of the second limiting plates (507); the two sets of the second limiting plates (507) are symmetrically arranged on both sides of the knob (506); The end of the second limiting plate (507) is inserted into the inner side of the arc-shaped groove (506b); the second limiting plate (507) can limit the knob (506).

7. The T1 periodic test interface device for the reactor protection system as described in any one of claims 1 to 6, characterized in that: It also includes, A conduit (700); the conduit (700) is disposed inside the clamping unit (N); PIPS terminal unit (600); the PIPS terminal unit (600) includes a PIPS signal preprocessing module (601) and mounting plates (602) disposed on both sides of the PIPS signal preprocessing module (601); the mounting plate (602) includes a second through hole (602a) formed therein; The PIPS signal preprocessing module is equipped with an active isolation relay. Its function is to change the signal connection method by flipping the contacts. The relay has normally closed contact A and normally open contact B. Contact A, that is, normally closed contact, maintains the connection with the local field signal, while normally open contact B is connected to the test signal. The flipping of the relay contacts is controlled by the periodic automatic test device. The backplane of the PIPS signal preprocessing module is equipped with a terminal unit and an input conversion module, which serve as the connection interface for the T1 periodic test device. After the test signal is isolated and distributed by the isolator in the PIP unit, it is sent to the AI ​​module of the safety-level DCS control station, and finally sent to the MTS display of the engineer station through the RTC of the protection group control station.

8. The T1 periodic test interface device for the reactor protection system as described in claim 7, characterized in that: The clamping assembly (200) includes a support frame (201), a connecting shaft (202) disposed inside the support frame (201), arc-shaped blocks (203) disposed at both ends of the connecting shaft (202), a clamping plate (204) disposed on one side of the arc-shaped blocks (203), an annular member (205) disposed on one side of the clamping plate (204), and a circular hole (206) disposed at the end of the connecting shaft (202). The limiting assembly (300) includes a second hinge seat (301), a pawl (302) disposed inside the second hinge seat (301), a torsion spring (303) disposed outside the pawl (302), a third connecting rod (304) disposed on the outer wall of the second hinge seat (301), and a button (305) disposed at the end of the third connecting rod (304); The transmission assembly (400) includes a connecting post (401), a limiting post (402) disposed on the side wall of the connecting post (401), and a third limiting plate (403) disposed at the end of the connecting post (401). The connecting post (401) is disposed inside the circular hole (206); the pawl (302) is disposed inside the annular part (205); the end of the third limiting plate (403) passes through the button (305) and extends into its interior.

9. The T1 periodic test interface device for the reactor protection system as described in claim 8, characterized in that: The support frame (201) includes a first through groove (201a) disposed on its inner side, a second through groove (201b) disposed on one side of the first through groove (201a), a bushing (201c) disposed on the inner wall of the support frame (201), a third through groove (201d) disposed on the side wall of the support frame (201), and a fourth through groove (201e) disposed on one side of the third through groove (201d). One end of the connecting shaft (202) is engaged with the bushing (201c); the other end of the connecting shaft (202) passes through the third through groove (201d) and extends to its outer side; The position of the first through groove (201a) corresponds to the position of the clamping plate (204); the position of the second through groove (201b) corresponds to the position of the arc-shaped block (203); The annular component (205) includes a circular ring (205a) and a limiting tooth (205b) disposed on the inner side of the circular ring (205a); the limiting tooth (205b) is in multiple sets, and the multiple sets of the limiting tooth (205b) are equidistantly distributed along the inner wall of the circular ring (205a); The circular ring (205a) is welded and fixed to the arc-shaped block (203); the pawl (302) is adapted to the gap formed by the adjacent limiting tooth (205b); The second hinge seat (301) includes a protrusion (301a) disposed on its inner side; The pawl (302) rotates inside the second hinge seat (301); the third connecting rod (304) includes a limiting block (304a) disposed on its outer wall.

10. The T1 periodic test interface device for the reactor protection system as described in claim 9, characterized in that: The third connecting rod (304) is welded and fixed to the button (305); the button (305) includes a cavity (305a) disposed therein; The torsion spring (303) uses its rebound force to make the sidewall of the pawl (302) fit tightly against the end of the protrusion (301a); The end of the pawl (302) contacts the side wall of the limiting tooth (205b); The circular hole (206) includes a slide (206a) disposed on its side wall; The limiting post (402) penetrates the slide rail (206a) and extends to its outer side; the limiting post (402) is adapted to the slide rail (206a); The third limiting plate (403) includes a fixing plate (403a) disposed at its end; the fixing plate (403a) is adapted to the cavity (305a); The third connecting rod (304) is adapted to the third through groove (201d); the third connecting rod (304) passes through the third through groove (201d) and extends to its outer side; The connecting shaft (202) passes through the fourth through groove (201e) and extends to its outer side; the third through groove (201d) is connected to the fourth through groove (201e).

Images