Replaceable in-reactor measuring device

By setting a fixed frame and improving the plug structure in the in-pile measuring device, the problem of parts falling off in traditional devices was solved, and the safety and ease of operation of the replacement process were achieved.

CN222319763UActive Publication Date: 2025-01-07CHINA GENERAL NUCLEAR POWER OPERATION +1
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Patent Information

Application Number
CN202420876597.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-25
Publication Date
2025-01-07
Estimated Expiration
2034-04-25

AI Technical Summary

Technical Problem

Traditional replaceable in-core measurement devices are prone to parts falling into the reactor pool during replacement, causing equipment damage. They are also difficult to operate and have a high rate of human error.

Method used

A replaceable in-pile measurement device was designed. By setting a fixing bracket on the chuck cover plate to fix the connector, improving the structure of the plug, and using anti-foreign object nuts and wrenches, the risk of the connector falling off during replacement is reduced.

Benefits of technology

This reduces the probability of connectors falling into the reactor pool, decreases operational difficulty and human error rate, and improves the safety and efficiency of equipment replacement.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a replaceable in-reactor measuring device. The replaceable in-pile measurement device comprises an in-pile measurement assembly and a yoke cover plate, the in-pile measurement assembly comprises an in-pile measurement finger sleeve and an in-pile measurement instrument, one end of the in-pile measurement finger sleeve is connected with the in-pile measurement instrument, and the other end of the in-pile measurement finger sleeve is arranged in a reactor. A plurality of in-pile measuring finger sleeves are connected with an in-pile measuring instrument through a yoke frame cover plate, the in-pile measuring finger sleeves are installed on the yoke frame cover plate through connecting pieces, the yoke frame cover plate is provided with a fixing frame, and the fixing frame is used for fixing the connecting pieces when the in-pile measuring finger sleeves are installed. The replaceable in-reactor measuring device has the advantages of being low in operation difficulty and low in human error rate.
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Description

Technical Field

[0001] The present application relates to the technical field of maintenance technology of in-pile measurement systems, and in particular to a replaceable in-pile measurement device. Background Art

[0002] In-pile measurement devices play a vital role in nuclear power plants and are an important instrumentation and control system. In-pile measurement devices play an important role in monitoring the status of reactors, ensuring safe operation, and providing key decision-making information. Through the measurement of neutron flux, temperature, and pressure vessel water level, as well as data processing and analysis, they can comprehensively evaluate the performance and safety of reactors and provide strong guarantees for the stable operation of nuclear power plants.

[0003] The traditional replaceable in-pile measuring device mainly sets the detection end of the in-pile measuring finger sleeve in the reactor, and connects the other end to the in-pile measuring instrument for analysis. However, the in-pile measuring finger sleeve will suffer from aging problems such as wear and corrosion after long-term operation in the reactor, and needs to be replaced at an appropriate time. The in-pile measuring finger sleeve has a high radioactive dose rate, and the replacement operation is performed above the reactor pool. During the replacement process, it is easy for parts to fall into the reactor pool and become foreign matter, which may cause damage to the equipment. It has the defects of high difficulty in operation and high human error rate. Summary of the invention

[0004] Based on this, it is necessary to provide a replaceable in-core measuring device to address the problem that parts are prone to falling into the reactor pool and becoming foreign matter.

[0005] A replaceable in-pile measuring device, comprising:

[0006] An in-pile measurement assembly, the in-pile measurement assembly comprising an in-pile measurement finger sleeve and an in-pile measurement instrument, one end of the in-pile measurement finger sleeve is connected to the in-pile measurement instrument, and the other end of the in-pile measurement finger sleeve is arranged in the reactor;

[0007] A strut cover plate, the in-pile measuring finger sleeve is connected to the in-pile measuring instrument through the strut cover plate, the in-pile measuring finger sleeve is installed on the strut cover plate through a connecting piece, and the strut cover plate is provided with a fixing frame, and the fixing frame is used to fix the connecting piece when installing the in-pile measuring finger sleeve.

[0008] In one of the embodiments, the fixing frame includes a connecting plate and a mounting plate, wherein the connecting plate is mounted on the yoke cover plate, the connecting plate is connected to the mounting plate, and the mounting plate is provided with a mounting groove, and the mounting groove is used to fix the connecting member.

[0009] In one of the embodiments, the yoke cover plate is further provided with a bracket connecting plate, and the fixing frame is connected to the bracket connecting plate via a first fastener.

[0010] In one of the embodiments, the in-pile measurement assembly also includes a plug, and the plug cover is arranged on the top of the in-pile measuring instrument. The top of the in-pile measuring instrument is provided with a protrusion, and the protrusion is provided with a socket. The plug is provided with a slot and a spring pin, and the protrusion can be movably arranged in the slot, and the spring pin can be movably inserted into the socket.

[0011] In one embodiment, handles are provided on both sides of the plug.

[0012] In one of the embodiments, the in-pile measuring instrument and the strut cover are connected via an instrument sealing pipe seat, and the instrument sealing pipe seat is provided with an interface, and the interface is used to connect the in-pile measuring instrument or an anti-foreign object nut, and the anti-foreign object nut is detachably covered on the interface.

[0013] In one of the embodiments, a slot is provided at the top of the anti-foreign object nut, and a connecting portion is movably provided in the slot, and the connecting portion is used to connect an anti-lost rope.

[0014] In one of the embodiments, the anti-foreign object nut and the interface are connected via a threaded pair.

[0015] In one of the embodiments, the replaceable in-pile measuring device further comprises a wrench, the yoke cover plate is provided with a plurality of cover plate bolts, and the wrench is used for disassembling and assembling the cover plate bolts;

[0016] The wrench comprises a connecting rod and an operating rod, one end of the connecting rod is used to connect the cover plate bolt, and the other end of the connecting rod is connected to the operating rod.

[0017] In one of the embodiments, the replaceable in-pile measurement device also includes a replacement rack, which is arranged on one side of the in-pile measurement component and the gantry cover plate, and the replacement rack includes an upper platform and a lower platform, the upper platform corresponds to the position of the in-pile measurement component, and the lower platform corresponds to the position of the gantry cover plate.

[0018] In the replaceable in-pile measuring device, the detection ends of the multiple in-pile measuring finger sleeves are arranged in the reactor, and then the other ends of the multiple in-pile measuring finger sleeves are connected to the strut cover plate through the connecting piece, and the strut cover plate is connected to the in-pile measuring instrument. The measuring material and measuring data in the reactor are transmitted to the in-pile measuring instrument through the in-pile measuring finger sleeve for detection and analysis, so as to obtain the situation of the reactor. When the in-pile measuring finger sleeve is worn out, it is necessary to replace the in-pile measuring finger sleeve. When replacing, the connecting piece is first fixed on the fixing frame, and then the in-pile measuring finger sleeve is completely inserted into the connecting piece, and then the connecting piece and the strut cover plate are installed, so as to avoid the situation that the connecting piece falls into the reactor water pool during the connection process between the in-pile measuring finger sleeve and the connecting piece, and reduce the probability of foreign objects in the reactor water pool damaging the equipment, and has the advantages of low difficulty of operation and low human error rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of a replaceable in-pile measuring device according to an embodiment of the present application.

[0020] FIG. 2 is a side structural diagram of the replaceable in-pile measuring device described in an embodiment of the present application.

[0021] FIG3 is a schematic structural diagram of a fixing frame of a replaceable in-pile measuring device according to an embodiment of the present application.

[0022] FIG. 4 is a schematic structural diagram of a plug of a replaceable in-pile measuring device according to an embodiment of the present application.

[0023] FIG5 is a front cross-sectional view of the plug of the replaceable in-pile measuring device according to an embodiment of the present application.

[0024] FIG6 is a side cross-sectional view of the plug of the replaceable in-pile measuring device according to an embodiment of the present application.

[0025] FIG. 7 is a schematic structural diagram of a foreign body protection nut of a replaceable in-pile measurement device according to an embodiment of the present application.

[0026] FIG8 is a cross-sectional view of the foreign body prevention nut of the replaceable in-pile measurement device according to an embodiment of the present application.

[0027] FIG. 9 is a cross-sectional view of a wrench of a replaceable in-pile measuring device according to an embodiment of the present application.

[0028] Reference numerals: 100, in-pile measurement assembly; 110, in-pile measurement instrument; 111, raised portion; 120, in-pile measurement finger sleeve; 130, connector; 140, plug; 141, slot; 142, spring latch; 143, handle;

[0029] 200, choke cover plate; 210, fixing frame; 211, mounting plate; 211A, mounting groove; 212, connecting plate; 220, bracket connecting plate; 230, cover plate bolt; 240, wrench; 241, connecting rod; 242, operating rod;

[0030] 300, instrument sealing pipe seat; 310, interface; 320, foreign body prevention nut; 320A, slot; 321, connection part;

[0031] 400, replacement rack; 410, upper platform; 420, lower platform. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0038] Referring to FIG. 1 and FIG. 2, FIG. 1 and FIG. 2 show a schematic diagram of the structure of a replaceable in-pile measuring device in an embodiment of the present application. The replaceable in-pile measuring device provided in an embodiment of the present application includes an in-pile measuring assembly 100 and a yoke cover plate 200. The in-pile measuring assembly 100 includes an in-pile measuring finger sleeve 120 and an in-pile measuring instrument 110. One end of the in-pile measuring finger sleeve 120 is connected to the in-pile measuring instrument 110, and the other end of the in-pile measuring finger sleeve 120 is arranged in the reactor. The in-pile measuring finger sleeve 120 is connected to the in-pile measuring instrument 110 through the yoke cover plate 200. The in-pile measuring finger sleeve 120 is installed on the yoke cover plate 200 through a connecting piece 130. The yoke cover plate 200 is provided with a fixing frame 210. The fixing frame 210 is used to fix the connecting piece 130 when installing the in-pile measuring finger sleeve 120. In one example, the connecting piece 130 is a flange connecting piece.

[0039] In the replaceable in-core measuring device described in the embodiment of the present application, the detection ends of the multiple in-core measuring finger sleeves 120 are arranged in the reactor, and then the other ends of the multiple in-core measuring finger sleeves 120 are connected to the choke cover 200 through the connecting piece 130, and the choke cover 200 is connected to the in-core measuring instrument 110, and the measuring material and measuring data in the reactor are transmitted to the in-core measuring instrument 110 through the in-core measuring finger sleeve 120 for detection and analysis, so as to obtain the situation of the reactor. When the in-core measuring finger sleeve 120 is worn out, it is necessary to replace the in-core measuring finger sleeve 120. During replacement, the connecting piece 130 is first fixed to the fixing frame 210, and then the in-core measuring finger sleeve 120 is completely inserted into the connecting piece 130, and then the connecting piece 130 is installed with the choke cover 200, so as to avoid the situation that the connecting piece 130 falls into the reactor water pool during the connection process between the in-core measuring finger sleeve 120 and the connecting piece 130.

[0040] The replaceable in-core measuring device described in the embodiment of the present application is modified by fixing the connecting piece 130 on a fixing frame 210 and then connecting the in-core measuring finger sleeve 120 when manually replacing the in-core measuring finger sleeve 120, thereby reducing the probability of the connecting piece 130 falling into the reactor pool and becoming a foreign body, and has the advantages of low difficulty in operation and low human error rate.

[0041] As shown in FIG3 , FIG3 shows a schematic diagram of the structure of a fixing frame 210 of a replaceable in-pile measuring device in an embodiment of the present application. In some embodiments, the fixing frame 210 includes a connecting plate 212 and a mounting plate 211. The connecting plate 212 is mounted on the yoke cover plate 200. The connecting plate 212 is connected to the mounting plate 211. The mounting plate 211 is horizontally arranged. The mounting plate 211 is provided with a mounting groove 211A. The mounting groove 211A is used to fix the connecting member 130. The connecting plate 212 and the mounting plate 211 of the fixing frame 210 are arranged in an L-shaped structure. The mounting plate 211 is horizontally arranged. The connecting plate 212 is mounted on the side of the yoke cover plate 200, so as to fix the fixing frame 210. Specifically, the mounting plate 211 is provided with a mounting groove 211A, so that the connecting member 130 can be fixedly installed in the mounting groove 211A, so that the connecting member 130 does not need to be manually supported when connecting the measuring finger sleeve 120 in the reactor, thereby reducing the difficulty of operation, thereby reducing the possibility of human error and reducing the possibility of foreign matter falling into the reactor pool.

[0042] In an optional embodiment, as shown in Fig. 1 and Fig. 3, the yoke cover plate 200 is further provided with a bracket connecting plate 220, and the fixing frame 210 is connected to the bracket connecting plate 220 via a first fastener. By providing the bracket connecting plate 220 on the side of the yoke cover plate 200, the bracket connecting plate 220 is connected to the connecting plate 212 of the fixing frame 210 using the first fastener, ensuring that the fixing frame 210 is firmly installed.

[0043] In an optional embodiment, as shown in FIGS. 4 to 6 , the in-pile measurement assembly 100 further includes a plug 140, which is covered on the top of the in-pile measurement instrument 110, and a protrusion 111 is provided on the top of the in-pile measurement instrument 110, and the protrusion 111 is provided with a socket, and the plug 140 is provided with a slot 141 and a spring latch 142, and the protrusion 111 can be movably arranged in the slot 141, and the spring latch 142 can be movably inserted into the socket. Specifically, the plug 140 is designed so that the center of gravity of the plug 140 is at the center of the structure, which is convenient for use. By providing the plug 140, the parts inside the in-pile measurement instrument 110 can be protected, and the plug 140 can be easily disassembled to inspect and repair the in-pile measurement assembly 100. The plug 140 is portable. When the plug 140 is installed on the in-pile measuring instrument 110, the slot 141 is inserted into the protrusion 111, and the spring latch 142 is inserted into the insertion hole of the protrusion 111 to lock it. Specifically, the protrusion 111 is set in a triangle shape, so that the protrusion 111 can be inserted into the slot 141 more conveniently and quickly. When the plug 140 needs to be removed, the spring latch 142 is pulled out of the insertion hole, and then the plug 140 can be pulled out of the in-pile measuring instrument 110. By setting the plug 140 as a disassembly and assembly method of the spring latch 142 and the insertion hole, the stability and accuracy of the clamping of the plug 140 are improved, and the plug 140 is prevented from falling into the pool and becoming a foreign object after being disassembled, which has the advantages of low difficulty in operation and low human error rate.

[0044] In an optional embodiment, as shown in Fig. 5, handles 143 are provided on both sides of the plug 140. By providing the handles 143 on both sides of the plug 140, the convenience of using the plug 140 is improved.

[0045] In an optional embodiment, as shown in FIG. 1 and FIG. 7 , the in-pile measuring instrument 110 and the choke cover plate 200 are connected via an instrument sealing pipe seat 300. The instrument sealing pipe seat 300 is provided with an interface 310. The interface 310 is used to connect the in-pile measuring instrument 110 or an anti-foreign matter nut 320. The anti-foreign matter nut 320 is detachably covered on the interface 310. The instrument sealing pipe seat 300 is used to connect the choke cover plate 200 and the in-pile measuring instrument 110. Specifically, the sealing pipe seat 300 is connected to the in-pile measuring instrument 110 via the interface 310. When the in-pile measuring instrument 110 is disassembled for maintenance and overhaul, the interface 310 needs to be protected by installing an anti-foreign matter nut 320 on the interface 310 to prevent foreign matter from falling into the interface 310 or damaging the sealing surface of the interface 310, thereby reducing the probability of equipment damage.

[0046] Furthermore, due to the small size of the anti-foreign object nut 320, there is a risk of loss during the assembly and disassembly process. As shown in Figure 8, a slot 320A is provided at the top of the anti-foreign object nut 320, and a connecting portion 321 is movably provided in the slot 320A, and the connecting portion 321 is used to connect the anti-lost rope. By providing a circumferentially rotatable connecting portion 321 at the top of the anti-foreign object nut 320, and providing a through hole on the connecting portion 321, the anti-lost rope can be passed through the through hole and connected to the connecting portion 321, thereby preventing the anti-foreign object nut 320 from being lost or falling into the reactor pool, and ensuring the normal operation of the equipment. Since the connecting portion 321 is rotatably arranged, when the anti-foreign object nut 320 is assembled and disassembled, the anti-foreign object nut 320 rotates while the connecting portion 321 does not rotate, thereby preventing the anti-lost rope connected to the connecting portion 321 from being entangled and affecting the installation effect.

[0047] In an optional embodiment, the anti-foreign matter nut 320 and the interface 310 are connected by a threaded pair. The outer wall of the interface 310 is provided with an external thread, and the anti-foreign matter nut 320 is provided with an internal thread. The anti-foreign matter nut 320 and the interface 310 are connected by threads to ensure the stability of the connection and prevent the anti-foreign matter nut 320 from falling off.

[0048] In an optional embodiment, as shown in FIG9 , the replaceable in-pile measuring device further includes a wrench 240, and the strut cover plate 200 is provided with a plurality of cover plate bolts 230, and the wrench 240 is used for disassembling and assembling the cover plate bolts 230. Specifically, the wrench 240 includes a connecting rod 241 and an operating rod 242, one end of the connecting rod 241 is used to connect the cover plate bolts 230, and the other end of the connecting rod 241 is connected to the operating rod 242. Specifically, the diameter of the middle section of the connecting rod 241 and the operating rod 242 is smaller than the diameter of the two ends, which reduces the weight while meeting the use of the tool and is easy to carry. The wrench 240 adopts an integrated design, and the connecting rod 241 and the operating rod 242 are used in combination. The outer hexagonal head at the lower end of the connecting rod 241 is inserted into the inner hexagonal hole of the cover plate bolt 230, which is used for the installation and removal of the cover plate bolt 230. During the disassembly and assembly process of the cover bolt 230, the force of the operating rod 242 is directly transmitted to the bolt head, thereby avoiding the situation where parts are lost and fall into the reactor pool when using a disassembly tool with multiple sections.

[0049] In an optional embodiment, as shown in FIG. 1 and FIG. 2 , the replaceable in-pile measuring device further includes a replacement rack 400, which is disposed on one side of the in-pile measuring assembly 100 and the yoke cover plate 200. The replacement rack 400 includes an upper platform 410 and a lower platform 420, wherein the upper platform 410 is disposed corresponding to the position of the in-pile measuring assembly 100, and the lower platform 420 is disposed corresponding to the position of the yoke cover plate 200. By disposing the replacement rack 400 on one side of the in-pile measuring assembly 100 and the yoke cover plate 200, the in-pile measuring instrument 110 can be maintained and repaired on the upper platform 410 of the replacement rack 400, and the in-pile measuring finger sleeve 120 can be replaced on the lower platform 420 of the replacement rack 400, which has the advantages of convenient operation and improved labor efficiency.

[0050] The replaceable in-pile measuring device described in the embodiment of the present application has the following beneficial effects:

[0051] 1. When manually replacing the in-core measuring finger sleeve 120, the manual support connection member 130 is modified to be connected to the in-core measuring finger sleeve 120 after the connection member 130 is fixed on the fixing frame 210, thereby reducing the probability of the connection member 130 falling into the reactor pool and becoming a foreign body, which has the advantages of low difficulty of operation and low human error rate.

[0052] 2. By setting the plug 140 as a spring pin 142 and a socket for assembly and disassembly, the stability and accuracy of the plug 140 clamping are improved, preventing the plug 140 from falling into the pool and becoming a foreign object after being disassembled, which has the advantages of low operating difficulty and low human error rate.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A replaceable in-pile measuring device, characterized in that: include: An in-pile measurement assembly (100), the in-pile measurement assembly (100) comprising an in-pile measurement finger sleeve (120) and an in-pile measurement instrument (110), one end of the in-pile measurement finger sleeve (120) being connected to the in-pile measurement instrument (110), and the other end of the in-pile measurement finger sleeve (120) being arranged in the reactor; A strut cover plate (200), the in-pile measuring finger sleeve (120) is connected to the in-pile measuring instrument (110) via the strut cover plate (200), the in-pile measuring finger sleeve (120) is installed on the strut cover plate (200) via a connecting piece (130), the strut cover plate (200) is provided with a fixing frame (210), and the fixing frame (210) is used to fix the connecting piece (130) when installing the in-pile measuring finger sleeve (120).

2. The replaceable in-pile measuring device according to claim 1, characterized in that: The fixing frame (210) comprises a connecting plate (212) and a mounting plate (211); the connecting plate (212) is mounted on the yoke cover plate (200); the connecting plate (212) is connected to the mounting plate (211); the mounting plate (211) is provided with a mounting groove (211A); the mounting groove (211A) is used to fix the connecting member (130).

3. The replaceable in-pile measuring device according to claim 2, characterized in that: The yoke cover plate (200) is also provided with a bracket connecting plate (220), and the fixing frame (210) is connected to the bracket connecting plate (220) via a first fastener.

4. The replaceable in-pile measuring device according to claim 1, characterized in that: The in-pile measurement assembly (100) further comprises a plug (140), the plug (140) being arranged to cover the top of the in-pile measurement instrument (110), the top of the in-pile measurement instrument (110) being provided with a protrusion (111), the protrusion (111) being provided with a plug hole, the plug (140) being provided with a slot (141) and a spring latch (142), the protrusion (111) being movably arranged in the slot (141), and the spring latch (142) being movably inserted into the plug hole.

5. The replaceable in-pile measuring device according to claim 4, characterized in that: Handles (143) are provided on both sides of the plug (140).

6. The replaceable in-pile measuring device according to claim 1, characterized in that: The in-pile measuring instrument (110) and the yoke cover plate (200) are connected via an instrument sealing pipe seat (300); the instrument sealing pipe seat (300) is provided with an interface (310); the interface (310) is used to connect the in-pile measuring instrument (110) or a foreign body prevention nut (320); the foreign body prevention nut (320) is detachably covered on the interface (310).

7. The replaceable in-pile measuring device according to claim 6, characterized in that: A slot (320A) is provided at the top of the anti-foreign-object nut (320), and a connecting portion (321) is movably provided in the slot (320A), and the connecting portion (321) is used to connect an anti-lost rope.

8. The replaceable in-pile measuring device according to claim 6, characterized in that: The foreign body preventing nut (320) and the interface (310) are connected via a threaded pair.

9. The replaceable in-pile measuring device according to claim 1, characterized in that: The replaceable in-pile measuring device further comprises a wrench (240); the yoke cover plate (200) is provided with a plurality of cover plate bolts (230); the wrench (240) is used for disassembling and assembling the cover plate bolts (230); The wrench (240) comprises a connecting rod (241) and an operating rod (242), one end of the connecting rod (241) is used to connect the cover plate bolt (230), and the other end of the connecting rod (241) is connected to the operating rod (242).

10. The replaceable in-pile measuring device according to claim 1, characterized in that: The replaceable in-pile measurement device further comprises a replacement rack (400), the replacement rack (400) being arranged on one side of the in-pile measurement component (100) and the yoke cover plate (200), the replacement rack (400) comprising an upper platform (410) and a lower platform (420), the upper platform (410) being arranged corresponding to the position of the in-pile measurement component (100), and the lower platform (420) being arranged corresponding to the position of the yoke cover plate (200).