Modularized supporting device for small nuclear reactor instrument tube

Abstract

The invention provides a modularized supporting device for a small nuclear reactor instrument pipe, which comprises a mounting module, a pipe clamp module and a fixing module, the mounting module comprises C-shaped steel and a flexible buffer piece, and the supporting device is fixed through an expansion bolt connecting hole at the bottom of the C-shaped steel; the pipe clamp module comprises an upper pipe clamp and a lower pipe clamp, an instrument pipe hole is formed between the upper pipe clamp and the lower pipe clamp, the instrument pipe hole is matched with an instrument pipe in specification, and a certain protection effect can be achieved while the instrument pipe is fixedly supported; the fixing module adopts specially-customized square-top square-column bolts, square tops of the fixing module are connected with clamping grooves of the C-shaped steel in a matched mode, installation and attachment are guaranteed through flexible buffering pieces, bolt holes are correspondingly formed in the upper pipe clamp and the lower pipe clamp, and the upper pipe clamp, the lower pipe clamp and the C-shaped steel are connected into a whole through the square-top square-column bolts. And the modules are locked and fixed through the gaskets and the double locking nuts, the modules are connected stably, bolts can be effectively prevented from falling off, and the overall safety and reliability of the supporting device are improved.

Description

Technical Field

[0001] The invention belongs to the field of nuclear reactors and instrument tubes, and in particular relates to a modular supporting device for instrument tubes of small nuclear reactors. Background Art

[0002] During the operation of a small nuclear reactor, it is necessary to measure parameters such as pressure, liquid level, flow rate, etc. of process media, containers or equipment to obtain relevant power plant status information, provide necessary basic guarantees for the normal operation of the power plant, and ensure the accuracy and effectiveness of medium parameters, which is of great significance to the safe operation of the entire small nuclear reactor. Instrument tubes are connected to various instruments and are an important path for collecting process signals. They are also an important source of control data for small nuclear reactors. Small nuclear reactors are small in scale and compact in layout. The internal instrument tubes are densely distributed, almost covering every corner of the power plant. Their availability and integrity directly affect whether the small nuclear reactor can be controlled normally and the safe operation of the small nuclear reactor. Since the instrument tubes usually have a long span during the laying process and their size specifications are small, they are easily damaged in collisions. Therefore, a large number of instrument tube support structures are required to provide reliable support.

[0003] The support structure not only supports the weight of the pipeline, balances the forces of the pipeline system and the fluid medium, and limits the displacement of the pipeline, but also needs to withstand dynamic loads caused by earthquakes, etc. Since the installation environment of the instrument pipe is relatively complex, when designing the support structure, it is necessary not only to meet the support requirements of the pipeline and improve the pipeline stress, but also to consider protection issues. In the existing support structure, the instrument pipe is fixed to the steel section by a U-bolt pipe clamp, and the gap between the pipe clamp and the instrument pipe is adjusted to compress and fix the instrument pipe to achieve support for the instrument pipe. Since the instrument pipe is a precision component with a small bearing force, it is easy to cause damage during compression, affecting the measurement accuracy and even damaging the instrument pipe. When the gap is large and the friction is insufficient, it is difficult to fix the instrument pipe, and it is very easy to cause the bolts in the support structure to fall off under long-term high-frequency vibration. In addition, due to the additional shear load on the bolts, there is also a risk of breakage, and the safety and stability of the support structure are insufficient. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a modular support device for instrument pipes of small nuclear reactors, which can be used for the installation and laying of instrument pipes of small nuclear reactors, and can provide better protection for the instrument pipes without damaging them while stably supporting and installing them. The overall structure of the support device is safe and stable, and has high reliability. It can also be used for the installation and laying of pressure pipelines, pneumatic valve air supply pipelines and sampling pipelines of pressure equipment and pipelines of small nuclear reactors.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a modular support device for a small nuclear reactor instrument tube, comprising:

[0006] A mounting module, comprising a mounting member, wherein the mounting member is connected to a work surface;

[0007] A pipe clamp module is located on a side of the mounting member away from the working surface, and includes an instrument pipe clamp, an instrument pipe hole is opened in a horizontal direction on the instrument pipe clamp, an instrument pipe is installed in the instrument pipe hole, and a bolt hole is opened in a vertical direction on the instrument pipe clamp;

[0008] A fixing module, connected to the mounting module and the pipe clamp module, comprises:

[0009] A square-top square-column bolt connected to the mounting member and the instrument pipe clamp in a vertical direction;

[0010] A locking nut is arranged on a side of the instrument pipe clamp away from the mounting piece and is threadedly connected to the square-top square column bolt to lock and fix the pipe clamp module and the mounting module.

[0011] According to an embodiment provided by the present invention, the instrument pipe clamp comprises:

[0012] A lower pipe clamp, the bottom surface of which is tightly connected to a side of the mounting member away from the working surface;

[0013] An upper pipe clamp is arranged on a side of the lower pipe clamp away from the mounting member and is tightly connected to the lower pipe clamp;

[0014] The upper pipe clamp and the lower pipe clamp are respectively formed with arc-shaped grooves, and the openings of the arc-shaped grooves of the upper pipe clamp and the lower pipe clamp are arranged opposite to each other to form the instrument pipe hole, and the instrument pipe is installed in the instrument pipe hole;

[0015] Bolt holes are provided on the lower pipe clamp and the upper pipe clamp, and the square-top square-column bolts connect the upper pipe clamp and the lower pipe clamp through the bolt holes.

[0016] According to an embodiment provided by the present invention, the inner diameter of the instrument tube hole matches the diameter of the instrument tube.

[0017] According to an embodiment provided by the present invention, the number of the instrument pipe holes is two, which are distributed on both sides of the instrument pipe clamp.

[0018] According to an embodiment provided by the present invention, the mounting member is a C-shaped steel, and a connecting hole is formed on the bottom surface of the C-shaped steel so as to connect the C-shaped steel to the working surface.

[0019] According to an embodiment provided by the present invention, the end of the square-top square column bolt is a square top, a slot is formed inside the C-shaped steel, and the square top is located in the slot and is cooperatively connected therewith.

[0020] According to an embodiment provided by the present invention, the open end of the C-shaped steel is connected to the bottom surface of the lower pipe clamp, and the square-top square-column bolt passes through the open end and is connected to the lower pipe clamp and the upper pipe clamp.

[0021] According to an embodiment provided by the present invention, the installation module also includes a flexible buffer, which is connected between the upper end surface of the square top and the lower end surface of the open end of the C-shaped steel to achieve the fit between the square top and the C-shaped steel.

[0022] According to an embodiment provided by the present invention, the locking nut is a double locking nut, which is arranged on the side of the upper pipe clamp away from the lower pipe clamp, and is threadedly connected to the square-top square column bolt to lock and fix the pipe clamp module and the mounting module.

[0023] According to an embodiment provided by the present invention, the fixing module further includes a gasket, which is disposed between the locking nut and the upper pipe clamp to achieve a tight connection between the pipe clamp module and the mounting module.

[0024] The modular support device for instrument tubes of small nuclear reactors of the present invention adopts a novel modular pipe clamp structure, and uses upper and lower pipe clamps and formed instrument tube holes to fix and support the instrument tubes. The specification of the instrument tube holes is matched with the diameter of the instrument tubes, so as to improve the protection level of the instrument tubes. When ensuring that the functionality of the support device meets the laying and installation requirements, the support device can be prevented from causing deformation or damage to the instrument tubes. At the same time, the combination mode of the connecting piece and the supporting steel is improved, and the locking and fixing between the pipe clamp itself and the pipe clamp and the C-shaped steel are provided by specially customized square top square column bolts, and double nuts are used for locking to provide pre-tightening force, so as to ensure the reliability of the bolt connection, prevent the bolts from loosening and falling off, and improve the overall safety and reliability of the instrument tube support device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 A front view of an embodiment of a modular support device for a small nuclear reactor instrument tube provided by the present invention;

[0027] Figure 2 A top view of a pipe clamp module of an embodiment of a modular support device for a small nuclear reactor instrument pipe provided by the present invention;

[0028] Figure 3A top view of a fixing module of an embodiment of a modular support device for a small nuclear reactor instrument tube provided by the present invention;

[0029] Figure 4 A top view of an installation module of an embodiment of a modular support device for a small nuclear reactor instrument tube provided by the present invention;

[0030] Figure 5 A top view of an installation module of another embodiment of a modular support device for instrument tubes of a small nuclear reactor provided by the present invention.

[0031] Description of labels:

[0032] 100, installation module; 200, pipe clamp module; 300, fixing module;

[0033] 110, C-shaped steel; 120, flexible buffer;

[0034] 111, open end; 112, connecting hole;

[0035] 210, instrument pipe clamp; 220, instrument pipe hole;

[0036] 211, upper pipe clamp; 212, lower pipe clamp; 213, bolt hole;

[0037] 310, square top square column bolt; 320, double locking nut; 330, gasket;

[0038] 311. Square top; 312. Square stud. DETAILED DESCRIPTION

[0039] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0041] There are a large number of instrument tubes distributed inside a small nuclear reactor to obtain various parameters. As an important source of reactor control data, the instrument tubes directly affect the normal operation of the reactor. To ensure the normal operation of the instrument tubes, a reliable support structure is required to effectively support and protect them. The existing U-bolt pipe clamps are very likely to cause damage to the instrument tubes when they are pressed and fixed. The U-bolt pipe clamps are directly fixed to the steel section through nuts, which are prone to fall off or fly off under high-frequency vibrations, causing danger. The bolts may also break due to additional shear loads.

[0042] See also Figures 1 to 5 The present invention provides a modular support device for instrument pipes of small nuclear reactors, which includes an installation module 100, a pipe clamp module 200 and a fixing module 300. The installation module 100 is connected to the working surface to realize the arrangement of the support device at the installation site, where the working surface is a plane for laying and installing pipes; the pipe clamp module 200 is connected to the installation module 100, located on the side of the installation module 100 away from the working surface, and is used to support and fix the instrument pipe to achieve protection of the instrument pipe; the fixing module 300 is connected to the installation module 100 and the pipe clamp module 200, and is used to lock and fix the installation module 100 and the pipe clamp module 200, so as to achieve stable support and protection of the instrument pipe and ensure the stability and reliability of the entire device. The entire device adopts a modular design, which can meet the laying and installation requirements while preventing the support device from causing damage to the instrument pipe, improve the protection level of the instrument pipe, effectively prevent the loosening of the connection of each module, and improve the safety and reliability of the device. The structure is simple and easy to install and disassemble, and can achieve stable support and protection of the instrument pipe.

[0043] See also Figures 1 to 5 According to an embodiment provided by the present invention, the mounting module 100 includes a mounting member and a flexible buffer member 120. The mounting member is connected to the working surface to realize the arrangement of the support device at the installation site. The flexible buffer member 120 is arranged between the mounting member and the fixing module 300 to realize the buffering and installation fit between the fixing module 300 and the mounting module 100, ensure the stability of the connection between the mounting module 100 and the pipe clamp module 200 and can alleviate vibration, thereby realizing stable support and protection for the instrument pipe.

[0044] See also Figures 1 to 5According to an embodiment of the present invention, the mounting piece is a C-shaped steel 110, and a slot is formed inside the C-shaped steel 110. Specifically, the two side surfaces, the bottom surface, and the open end 111 thereof enclose the slot, and the open end 111 thereof is opposite to the bottom surface. The bottom surface of the C-shaped steel 110 is connected to the working surface, and the straight edge of the open end 111 thereof abuts against the bottom surface of the pipe clamp module 200. The fixing module 300 is disposed in the slot and connected therewith, which can ensure the strength of the mounting piece and effectively support the pipeline. At the same time, the fixing module 300 is used to tighten the pipe clamp module 200 and the mounting module 100 in the axial direction, so that each module can be locked and fixed, and the stable and reliable installation of the entire supporting device can be ensured. Specifically, a connection hole 112 is provided on the bottom surface of the C-shaped steel 110 to connect it to the work surface, and the open end 111 of the C-shaped steel 110 fits with the bottom surface of the pipe clamp module 200 to ensure the stability between the installation module 100 and the pipe clamp module 200. The fixing module 300 is arranged inside the card slot of the C-shaped steel 110 to cooperate with it, and passes through its open end 111 to connect with the upper pipe clamp module 200, so that the installation module 100 and the pipe clamp module 200 are locked and fixed, so as to achieve stable and reliable support and protection for the instrument pipe. In other embodiments, the mounting member can also be a special steel such as a channel steel.

[0045] Understandably, see Figures 1 to 5 The connection holes 112 on the bottom surface of the C-shaped steel 110 can be, for example, expansion bolt connection holes 112, which are used to fix the expansion bolts and connect the mounting parts to the working surface. According to the actual needs of the installation site, one or two or more expansion bolt connection holes 112 can be opened on the bottom surface of the C-shaped steel 110 to fix the entire support device to the working surface, thereby realizing the laying and installation of the instrument pipe.

[0046] See also Figures 1 to 5 According to an embodiment of the present invention, the fixing module 300 is disposed in the card slot and connected therewith, and a flexible buffer 120 is disposed between the fixing module 300 and the card slot to ensure that the fixing module 300 is tightly connected to the mounting member, so as to ensure that the connection between the mounting module 100 and the pipe clamp module 200 is stable and reliable when the fixing module 300 tightens the mounting module 100 and the pipe clamp module 200, and the flexible buffer 120 has a certain buffering effect on vibration loads, etc. In other embodiments, a flexible buffer 120 may also be disposed at the connection between the fixing module 300 and the pipe clamp module 200 to ensure a tight and reliable connection and achieve buffering and vibration reduction.

[0047] See also Figures 1 to 5According to an embodiment provided by the present invention, the pipe clamp module 200 is connected to the installation module 100 and is located on the side of the installation component away from the working surface. It includes an instrument pipe clamp 210. The instrument pipe clamp 210 is provided with an instrument pipe hole 220 in the horizontal direction. The instrument pipe is installed in the instrument pipe hole 220. The instrument pipe clamp 210 is provided with bolt holes 213 in the vertical direction. The fixing module 300 locks and fixes the pipe clamp module 200 and the installation module 100 in the axial direction. At the same time, the installation module 100 is fixed to the working surface by expansion bolts, so as to achieve the limitation and support of the instrument pipe.

[0048] See also Figures 1 to 5 According to an embodiment provided by the present invention, the inner diameter of the instrument tube hole 220 matches the tube diameter of the instrument tube to eliminate the gap between the instrument tube and the instrument tube hole 220, prevent looseness caused by insufficient friction, effectively prevent collision and pressure loss while ensuring fixation, and effectively eliminate unnecessary vibration. When the instrument tube is installed in the instrument tube hole 220, since the specifications of the instrument tube hole 220 match the instrument tube, the friction between the two is evenly distributed, and the instrument tube will not be damaged by bending due to force. It can also be used when there is a large friction force, and the friction between the instrument tube hole 220 and the instrument tube can achieve effective fixation and limiting. It can be understood that a flexible part can also be provided at the connection between the instrument tube hole 220 and the instrument tube to ensure the fit between the instrument tube and the instrument tube hole 220 and to achieve better protection for the instrument tube.

[0049] It should be noted that the instrument pipe hole 220 can be made into different specifications to match instrument pipes of different models. When laying and installing the instrument pipe, the instrument pipe hole 220 plays a guiding and fixing role, and its arrangement position determines the position of the instrument pipe. Usually, the instrument pipe hole 220 is parallel or perpendicular to the ground; the instrument pipe is installed and fixed in the instrument pipe hole 220, and the instrument pipe is limited and supported by the instrument pipe clamp 210 and the mounting parts.

[0050] See also Figures 1 to 5 According to an embodiment of the present invention, there are two instrument tube holes 220, which are distributed on both sides of the instrument tube clamp 210. During installation, one instrument tube hole 220 can be used alone, and the other tube hole can be used as a backup. Alternatively, two instrument tube holes 220 can be used simultaneously to lay and install the instrument tubes in parallel. When the two instrument tubes are laid and installed in parallel, there is a certain distance between the instrument tube holes 220, and no interference will occur between the two instrument tubes.

[0051] See also Figures 1 to 5According to an embodiment provided by the present invention, the instrument pipe clamp 210 includes a lower pipe clamp 212 and an upper pipe clamp 211, the bottom surface of the lower pipe clamp 212 is tightly connected to the side of the mounting member away from the working surface; the upper pipe clamp 211 is arranged on the side of the lower pipe clamp 212 away from the mounting member, and is tightly connected to the lower pipe clamp 212; arc-shaped grooves are formed on the upper pipe clamp 211 and the lower pipe clamp 212 respectively, and the openings of the arc-shaped grooves of the upper pipe clamp 211 and the lower pipe clamp 212 are arranged opposite to each other to form an instrument pipe hole 220, and the instrument pipe is installed in the instrument pipe hole 220; bolt holes 213 are opened on the lower pipe clamp 212 and the upper pipe clamp 211, and the fixing module 300 connects the upper pipe clamp 211 and the lower pipe clamp 212 through the bolt holes 213 to fix the pipe clamp module 200. The upper pipe clamp 211 is fixed to the lower pipe clamp 212 by using the fixing module 300, and then the lower pipe clamp 212 is locked and fixed to the installation module 100 to ensure stable support for the instrument tube. The instrument tube clamp 210 adopts a structure of upper and lower parts, which can better ensure the fit of the instrument tube and the instrument tube hole 220, effectively eliminate the gap, ensure the matching and stable connection between the instrument tube and the instrument tube hole 220, and is easy to install and disassemble, which improves the installation efficiency and can prevent collision damage to the instrument tube.

[0052] See also Figures 1 to 5 According to an embodiment of the present invention, the open end 111 of the C-shaped steel 110 is connected to the bottom surface of the lower pipe clamp 212, and the fixing module 300 passes through the open end 111 and is connected to the lower pipe clamp 212 to fix the C-shaped steel 110 and the lower pipe clamp 212. One end of the fixing module 300 is located in the card slot of the C-shaped steel 110 and is connected thereto to ensure the stability of the connection between the fixing module 300 and the installation module 100 and the strength of the installation module 100. The other end extends out the upper pipe clamp 211 to achieve locking and fixing between the upper pipe clamp 211, the lower pipe clamp 212 and the C-shaped steel 110, thereby ensuring the stability of the connection between each module and improving the overall safety and reliability of the support device.

[0053] See also Figures 1 to 5According to an embodiment of the present invention, the fixing module 300 is connected to the mounting module 100 and the pipe clamp module 200, and includes a square top square column bolt 310, a gasket 330 and a locking nut. The square top square column bolt 310 is connected to the mounting member and the instrument pipe clamp 210 in the vertical direction, one end of which is located in the mounting member and connected thereto, and the other end passes through the mounting member and is connected to the corresponding bolt holes 213 on the upper pipe clamp 211 and the lower pipe clamp 212 and extends out of the upper pipe clamp 211, connecting the upper and lower pipe clamps 212 with the mounting member as a whole; the locking nut is arranged on the instrument The side of the pipe clamp 210 away from the mounting part is threadedly connected to the square-top square column bolt 310 to lock and fix the pipe clamp module 200 and the mounting module 100. Specifically, the locking nut is arranged at the end face of the upper pipe clamp 211 and is threadedly connected to the fastening bolt extending from the upper pipe clamp 211 to provide a pre-tightening force to lock each module in the height direction, thereby enhancing the reliability and tightness of the connection; the gasket 330 is arranged between the locking nut and the upper pipe clamp 211 to achieve a tight connection between the pipe clamp module 200 and the mounting module 100 and enhance the stability of the connection.

[0054] See also Figures 1 to 5 According to an embodiment provided by the present invention, the end of the square top square column bolt 310 is a square top 311, and a slot is formed inside the C-shaped steel 110. The square top 311 is located in the slot of the C-shaped steel 110 and is connected with it. The specially customized square top square column bolt 310 is used, and the specification and shape of the square top 311 matches the size of the slot of the C-shaped steel 110. A certain gap is left at the connection on both sides. During installation, the square top 311 can slide back and forth in the slot of the C-shaped steel 110 for positioning. A flexible buffer 120 is also provided between the upper end surface of the square top 311 and the open end 111 of the C-shaped steel 110. The flexible buffer 120 is connected between the upper end surface of the square top 311 and the lower end surface of the open end 111 of the C-shaped steel 110 to achieve the fit between the square top 311 and the C-shaped steel 110, and play a certain buffering role. After each module is locked and fixed, the square top 311 and the slot can be firmly stuck without shaking on both sides.

[0055] See also Figures 1 to 5According to an embodiment of the present invention, the bolt holes 213 on the lower pipe clamp 212 and the upper pipe clamp 211 are square through holes, and the square studs 312 of the square-top square column bolts 310 cooperate with the bolt holes 213 to achieve circumferential fixation of the instrument pipe clamp 210. Specifically, the open end 111 of the C-shaped steel 110 is connected to the bottom surface of the lower pipe clamp 212, and the square top 311 at the end of the square top square column bolt 310 is located in the card slot of the C-shaped steel 110 and is matched with it. The stud passes through the open end 111 and is matched with the bolt holes 213 of the lower pipe clamp 212 and the upper pipe clamp 211, and extends out of the upper end surface of the upper pipe clamp 211, and is then fixed with a nut to lock the upper pipe clamp 211 and the lower pipe clamp 212 with the C-shaped steel 110. Since the stud of the square top square column bolt 310 is a square stud 312, and the corresponding bolt holes 213 on the lower pipe clamp 212 and the upper pipe clamp 211 are square through holes, the square stud 312 will not slide or shake when matched with the bolt holes 213 on the pipe clamp, and the instrument pipe clamp 210 can be limited in the circumferential direction of the bolt holes 213.

[0056] See also Figures 1 to 5 According to an embodiment provided by the present invention, the locking nut is a double locking nut 320, which is arranged on the side of the upper tube clamp 211 away from the lower tube clamp 212, that is, at the upper end surface of the upper tube clamp 211, and is threadedly connected to the square top square column bolt 310 to lock and fix the tube clamp module 200 and the installation module 100, which can effectively prevent loosening and ensure a stable and reliable connection. The square top square column bolt 310 connects the upper and lower pipe clamps 212 and the C-shaped steel 110 as a whole through the bolt holes 213 of the upper and lower pipe clamps 212 and the slots and openings of the C-shaped steel 110, and is pressed and locked by the double locking nuts 320 and the washers 330 at the end face of the upper pipe clamp 211, and the upper pipe clamp 211, the lower pipe clamp 212 and the C-shaped steel 110 are locked and fixed. The combination of the double locking nuts 320 and the washers 330 can make the modules of the entire instrument pipe support device tightly connected, the three sub-modules are locked without shaking, and the modules will not loosen during work, ensuring reliable support and protection for the instrument pipe; at the same time, the double locking nuts 320 are used to provide a pre-tightening force for locking, which can better ensure the reliability of the bolt connection, and will not loosen or fall off when subjected to dynamic loads, causing the device to fail or even cause safety hazards, and to a certain extent alleviate vibration, thereby improving the reliability and safety of the entire modular support structure.

[0057] See also Figures 1 to 5According to an embodiment of the present invention, when the instrument tube is laid and installed by using the instrument tube support device, the C-shaped steel 110 is installed and fixed to the working position by means of expansion bolts to ensure the fixation of the entire device; the square top 311 part of the square top square column bolt 310 is engaged with the slot of the C-shaped steel 110, and its square stud 312 is connected with the square bolt hole 213 on the instrument tube clamp 210, and the square top square column bolt 310 can slide back and forth in the slot to adjust the instrument tube clamp 210 to an appropriate position, and a flexible buffer 120 is provided between the square top 311 and the C-shaped steel 110 to fix and fit the bolt to the C-shaped steel 110; the instrument tube is provided in the arc-shaped groove of the lower tube clamp 212, and when the lower end face of the upper tube clamp 211 is fitted with the upper end face of the lower tube clamp 212, an instrument tube hole matching the instrument tube is formed. 220, fix the instrument tube; finally, connect the gasket 330 with the stud extending out of the upper tube clamp 211, use the double locking nut 320 and the stud to provide pre-tightening force through threaded connection, and press and fix the gasket 330 at the end face of the upper tube clamp 211, so that the upper tube clamp 211, the lower tube clamp 212 and the C-shaped steel 110 are locked in the vertical direction. At this time, the modules are tightly connected and will not shake, and the bolts will not loosen or fall off, ensuring the stability, reliability and safety of the entire device. When the instrument tube is fixed in the instrument tube clamp 210, unnecessary gaps are effectively eliminated, and the instrument tube is evenly stressed, which can prevent collision and pressure loss and eliminate unnecessary vibration. The instrument tube can be reliably supported and protected, and will not fail due to loose connections, thereby ensuring the stability and accuracy of the measured parameters.

[0058] In summary, the modular support device for instrument tubes of small nuclear reactors proposed in the present invention uses the instrument tube clamp 210 to limit and support the instrument tube. The size of the instrument tube hole 220 is customized according to the specification of the instrument tube to ensure the stability of the clamping and prevent loosening, effectively reduce the influence of vibration and friction on the instrument tube, and can play a good protective effect. The design of the upper tube clamp 211 and the lower tube clamp 212 is convenient for installation and disassembly, improves the installation efficiency and does not cause damage to the instrument tube; the fixing module 300 uses specially customized square top square column bolts 310 to provide locking and fixation between the tube clamp itself and the tube clamp and the C-shaped steel 110, and uses double nuts for locking to provide pre-tightening force, ensure the reliability of the bolt connection, prevent the bolts from loosening and falling off, and improve the overall safety and reliability of the support device. The present invention can strengthen the protection of the instrument tube to a certain extent while achieving the fixation and support of the instrument tube, so as to ensure the reliability of the measurement parameters, provide protection and technical support for the safe operation of the small nuclear reactor, and can also be used for the installation and laying of the pressure-bearing equipment and pipelines of the small nuclear reactor, the air supply pipelines of the pneumatic valves and the sampling pipelines.

[0059] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

[0060] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A modular support device for instrument tubes of small nuclear reactors, characterized in that: include: A mounting module, comprising a mounting member, wherein the mounting member is connected to a work surface; A pipe clamp module is located on a side of the mounting member away from the working surface, and includes an instrument pipe clamp, an instrument pipe hole is opened in a horizontal direction on the instrument pipe clamp, an instrument pipe is installed in the instrument pipe hole, and a bolt hole is opened in a vertical direction on the instrument pipe clamp; A fixing module, connected to the mounting module and the pipe clamp module, comprises: A square-top square-column bolt connected to the mounting member and the instrument pipe clamp in a vertical direction; A locking nut is arranged on a side of the instrument pipe clamp away from the mounting piece and is threadedly connected to the square-top square column bolt to lock and fix the pipe clamp module and the mounting module.

2. The modular support device for instrument tubes of small nuclear reactors according to claim 1, characterized in that: The instrument pipe clamp comprises: A lower pipe clamp, the bottom surface of which is tightly connected to a side of the mounting member away from the working surface; An upper pipe clamp is arranged on a side of the lower pipe clamp away from the mounting member and is tightly connected to the lower pipe clamp; The upper pipe clamp and the lower pipe clamp are respectively formed with arc-shaped grooves, and the openings of the arc-shaped grooves of the upper pipe clamp and the lower pipe clamp are arranged opposite to each other to form the instrument pipe hole, and the instrument pipe is installed in the instrument pipe hole; Bolt holes are provided on the lower pipe clamp and the upper pipe clamp, and the square-top square-column bolts connect the upper pipe clamp and the lower pipe clamp through the bolt holes.

3. The modular support device for instrument tubes of small nuclear reactors according to claim 1, characterized in that: The inner diameter of the instrument tube hole matches the diameter of the instrument tube.

4. The modular support device for instrument tubes of small nuclear reactors according to claim 1, characterized in that: The number of the instrument pipe holes is two, which are distributed on both sides of the instrument pipe clamp.

5. The modular support device for instrument tubes of small nuclear reactors according to claim 1, characterized in that: The mounting piece is a C-shaped steel, and a connecting hole is provided on the bottom surface of the mounting piece so as to connect the C-shaped steel to the working surface.

6. The modular support device for instrument tubes of small nuclear reactors according to claim 5, characterized in that: The end of the square-top square column bolt is a square top, a slot is formed inside the C-shaped steel, and the square top is located in the slot and is matched and connected therewith.

7. The modular support device for instrument tubes of small nuclear reactors according to claim 5, characterized in that: The open end of the C-shaped steel is connected to the bottom surface of the lower pipe clamp, and the square top square column bolt passes through the open end and is connected to the lower pipe clamp and the upper pipe clamp.

8. The modular support device for instrument tubes of small nuclear reactors according to claim 6, characterized in that: The mounting module further comprises a flexible buffer, which is connected between the upper end surface of the square top and the lower end surface of the open end of the C-shaped steel to achieve the fit between the square top and the C-shaped steel.

9. The modular support device for instrument tubes of small nuclear reactors according to claim 2, characterized in that: The locking nut is a double locking nut, which is arranged on a side of the upper pipe clamp away from the lower pipe clamp and is threadedly connected to the square-top square column bolt to lock and fix the pipe clamp module and the mounting module.

10. The modular support device for instrument tubes of small nuclear reactors according to claim 2, characterized in that: The fixing module also includes a gasket, which is arranged between the locking nut and the upper pipe clamp to achieve a tight connection between the pipe clamp module and the mounting module.

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