阅读说明：本技术 一种脉动压力测量装置及其使用方法 (Pulsating pressure measuring device and using method thereof ) 是由 喻丹萍 马建中 孙磊 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种脉动压力测量装置及其使用方法,其中,脉动压力测量装置包括保护罩和高温高压压力传感器,所述保护罩上设置有测量通孔,所述高温高压压力传感器通过固定件固定在所述保护罩内,且所述高温高压压力传感器的敏感面贯穿所述测量通孔并与所述测量通孔平齐。本发明的目的在于提供一种脉动压力测量装置及其使用方法,解决现有技术中需要在测量结构上开设开孔才能进行反应堆内结构表面压力测量的问题。(The invention discloses a pulsating pressure measuring device and a using method thereof, wherein the pulsating pressure measuring device comprises a protective cover and a high-temperature high-pressure sensor, a measuring through hole is formed in the protective cover, the high-temperature high-pressure sensor is fixed in the protective cover through a fixing piece, and the sensitive surface of the high-temperature high-pressure sensor penetrates through the measuring through hole and is flush with the measuring through hole. The invention aims to provide a pulsating pressure measuring device and a using method thereof, which solve the problem that the surface pressure of a reactor inner structure can be measured only by arranging an opening on a measuring structure in the prior art.)

1. The utility model provides a pulsation pressure measuring device, its characterized in that includes safety cover (1) and high temperature high pressure sensor, be provided with on safety cover (1) and measure the through-hole, high temperature high pressure sensor passes through the mounting and fixes in safety cover (1), just high temperature high pressure sensor's sensitive face runs through measure the through-hole and with measure the through-hole parallel and level.

2. A pulsating pressure measuring device as claimed in claim 1, wherein said fixing member is a hollow bolt (3).

3. A pulsating pressure measuring device as claimed in claim 2, wherein the inner wall of said measuring through hole is provided with a thread, and said hollow bolt (3) is threadedly connected with said measuring through hole.

4. The pulsating pressure measuring device as claimed in claim 3, wherein said high temperature and high pressure sensor is an armored sensor with integrated wires.

5. The pulsating pressure measuring device as claimed in claim 1, wherein a fixing device (5) is further provided in the protecting cover (1), and a high temperature and high pressure sensor wire provided in the protecting cover (1) is fixed on the fixing device (5).

6. A pulsating pressure measuring device as claimed in claim 1, characterized in that the protective cover (1) is provided with an ellipsoid shape.

7. A pulsating pressure measurement device as claimed in claim 6, wherein said measuring through hole is provided in the center of said protective cover (1).

8. A pulsating pressure measuring device as claimed in claim 1, characterized in that the outer surface of the protective cover (1) is provided as a smooth surface.

9. The pulsating pressure measurement device of claim 1, wherein said radius of said shroud is at least 10 times the height of said shroud.

10. Use of a device for measuring pulsating pressure according to any of claims 1 to 9, characterized by comprising the following sub-steps:

s1: spot welding the protective cover (1) to the outer surface of the measuring structure;

s2: leading the high-temperature high-pressure sensor lead exposed out of the protective cover (1) out of the pressure container and connecting the high-temperature high-pressure sensor lead into a measurement system;

s3: starting measurement and recording a pressure signal;

s4: and (5) finishing measurement, polishing the spot welding part, and dismantling the protective cover (1).

Technical Field

The invention relates to the technical field of surface pressure testing of a component structure in a reactor, in particular to a pulsating pressure measuring device and a using method thereof.

Background

For a reactor, a high flow rate of coolant is needed to take away a large amount of heat generated by nuclear reaction, the coolant flow can cause vibration of an in-reactor structure, and the in-reactor structure has the problem of flow-induced vibration as long as the reactor is operated. When the vibration of the structural component of the reactor system induced by the flow of the coolant is considered, the excitation load of the fluid on the structure needs to be known, the pulsating pressure of the fluid acting on the surface of the structure is measured through the high-temperature high-pressure pulsating pressure sensor arranged on the structure in the reactor, the vibration safety of the structure is further evaluated, and the method has important engineering significance.

At present, a high-temperature high-pressure sensor for measuring the surface pressure of a structure in a reactor is designed into an armored type with an integrated lead, the front end of a sensor head is a sensitive surface for measuring the pressure, the rear end of the sensor head is a stainless steel long lead, the general installation mode is that after the sensor passes through a structural pre-opening hole, the sensitive surface of the front end of the sensor head is flush with the surface of the structure, the lead of the sensor is arranged at the rear end, and the load generated by the pressure fluctuation of fluid acting on the structure is measured on the premise of not influencing a flow field.

In the reactor internals of an actual nuclear power plant, a hole is not allowed to be formed for mounting a pressure sensor to destroy a structure, and even if the hole is allowed to be formed, an operation space for arranging a sensor wire is not provided at the rear end, so that a special pressure measuring device needs to be designed on the premise of not damaging a measuring structure.

Disclosure of Invention

The invention aims to provide a pulsating pressure measuring device and a using method thereof, which solve the problem that the surface pressure of a reactor inner structure can be measured only by arranging an opening on a measuring structure in the prior art.

The invention is realized by the following technical scheme:

the utility model provides a pulsation pressure measuring device, includes safety cover and high temperature high pressure sensor, be provided with the measurement through-hole on the safety cover, high temperature high pressure sensor passes through the mounting to be fixed in the safety cover, just high temperature high pressure sensor's sensitive face runs through the measurement through-hole and with measure the through-hole parallel and level.

In the prior art, in order to measure the surface pressure of the reactor internals, a hole for installing a sensor needs to be formed in a measuring structure, so that the structure of the reactor internals can be damaged, in the nuclear field, the structure of the reactor internals has special requirements, the service life of the reactor internals can be influenced by the damage of the structure of some reactor internals, the use or maintenance cost is increased, and certain risks exist in the damage of the structure of some reactor internals. Based on this, this scheme has proposed a pressure measurement device, when specifically using, need not to carry out the trompil operation in advance on the internals, but directly installs pressure measurement device in the structure surface, dismantles the processing after experimental completion, consequently, can not destroy the structure of internals, can overcome the defect that exists among the prior art. In addition, because measuring device can dismantle, consequently high temperature high pressure sensor can used repeatedly, can effectively save experimental cost.

Preferably, the fixing member is a hollow bolt.

The hollow bolt is a hollow bolt, and when the high-temperature high-pressure sensor is used specifically, the hollow bolt with the corresponding size is selected according to the size of the high-temperature high-pressure sensor, so that the high-temperature high-pressure sensor can be placed in the hollow part of the screw, and meanwhile, the high-temperature high-pressure sensor cannot fall off from the hollow part of the screw.

Preferably, a thread is arranged in the measuring through hole, and the hollow bolt is in threaded connection with the measuring through hole.

Preferably, the high-temperature and high-pressure sensor is an armored sensor with an integrated wire.

Preferably, a fixing device is further arranged in the protective cover, and a high-temperature high-pressure sensor wire arranged in the protective cover is fixed on the fixing device.

Because in the use, the surface of safety cover can be erodeed to the coolant, for avoiding leading to the cavity bolt to become flexible and drop with measuring the through-hole because of the cooling water erodees the safety cover for a long time, the safety cover internal surface still is provided with fixing device for it is fixed to be located the pressure sensor wire of safety cover, thereby reduces the risk that drops, perhaps when droing, through fixed sensor wire protection pressure sensor head, the pressure sensor head of avoiding droing touches with the structure surface, damages pressure sensor head.

Meanwhile, the pressure sensor wire is exposed at the bottom of the hollow bolt, so that a certain distance exists between the pressure sensor wire and the top of the protection cover, and if the pressure sensor wire is directly fixed at the top of the protection cover, the pressure sensor wire can be bent to a certain degree, and the bent part is easily broken. Based on this, in the embodiment, the fixing device is provided in two, one is provided on the top of the protection cover, and the other is provided on the side wall of the protection cover. Specifically, the fixed seat is arranged at the top, so that the height of the fixed seat is slightly higher than the bottom of the hollow bolt, when the pressure sensor lead is fixed, the pressure sensor lead is not bent horizontally at a right angle, but is slowly bent horizontally after the pressure sensor lead is vertically extended, and the bent part is prevented from being broken; all set up the joint spare on the medial surface of protective cover and fixing base simultaneously, fix the pressure sensor wire through the joint spare, not only easy operation can also save operating time, promotes work efficiency.

Preferably, the measuring through hole is provided at the center of the protective cover.

Preferably, the protective cover is provided in an ellipsoidal shape.

Preferably, the outer surface of the protective cover is provided as a smooth surface.

Preferably, the radius of the boot is at least 10 times the height of the boot.

A method of using a pulsating pressure measurement device, comprising the sub-steps of:

s1: spot welding the protective cover to an outer surface of the measurement structure;

s2: leading the high-temperature high-pressure sensor lead exposed out of the protective cover out of the pressure container and connecting the high-temperature high-pressure sensor lead into a measurement system;

s3: starting measurement and recording a pressure signal;

s4: and finishing measurement, polishing the spot welding part, and dismantling the protective cover.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. on the premise of not damaging the measuring structure, the pressure of the surface of the structure in the reactor can be measured;

2. the measuring device has simple structure and convenient installation and disassembly, and the measuring structure is restored to the original state after being polished and disassembled; 3. the pressure sensor and the lead are protected from being washed and damaged by water flow, and the sensor can be used repeatedly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a top view of a pulsating pressure measurement device of the present invention;

FIG. 2 is a cross-sectional view of a pulsating pressure measurement device of the present invention;

reference numbers and corresponding part names in the drawings:

1. a protective cover; 2. a pressure sensor head; 3. a hollow bolt; 4. a pressure sensor wire; 5. and (4) a fixing device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Example 1

The embodiment provides a pulsating pressure measuring device, as shown in fig. 1, which comprises a protective cover 1 and a high-temperature high-pressure sensor, wherein a measuring through hole is formed in the protective cover 1, the high-temperature high-pressure sensor is fixed in the protective cover 1 through a fixing piece, and the sensitive surface of the high-temperature high-pressure sensor penetrates through the measuring through hole and is flush with the measuring through hole.

In the prior art, in order to measure the surface pressure of the reactor internals, a hole for installing a sensor needs to be formed in a measuring structure, so that the structure of the reactor internals can be damaged, in the nuclear field, the structure of the reactor internals has special requirements, the service life of the reactor internals can be influenced by the damage of the structure of some reactor internals, the use or maintenance cost is increased, and certain risks exist in the damage of the structure of some reactor internals. Based on this, this scheme has proposed a pressure measurement device, when specifically using, need not to carry out the trompil operation in advance on the internals, but directly installs pressure measurement device in the structure surface, dismantles the processing after experimental completion, consequently, can not destroy the structure of internals, can overcome the defect that exists among the prior art. In addition, because measuring device can dismantle, consequently high temperature high pressure sensor can used repeatedly, can effectively save experimental cost.

Specifically, the high-temperature and high-pressure sensor in this embodiment is an armored sensor with an integrated wire, that is: the high-temperature and high-pressure sensor comprises a pressure sensor head 2 and a pressure sensor lead 4, wherein the front end of the pressure sensor head 2 is a sensitive surface for measuring pressure, and the rear end of the pressure sensor head 2 is connected with a stainless steel long lead (the pressure sensor lead 4); the fixing piece is arranged as a hollow bolt 3, the pressure sensor head 2 is arranged in a screw rod of the hollow bolt 3 and is exposed out of the top of the screw rod, and the pressure sensor lead 4 is exposed out of the bottom of the screw rod; the inner wall of the measuring through-hole is provided with a thread, and the external thread of the hollow bolt 3 is connected with the internal thread of the measuring through-hole, so that the pressure sensor head 2 is fixed inside the protective cover 1. In addition, the contact depth of the hollow bolt 3 and the measuring through hole is adjusted, so that the sensitive surface of the pressure sensor head 2 penetrates through the measuring through hole and is flush with the measuring through hole, and the detection accuracy of the high-temperature and high-pressure sensor is guaranteed.

Further, since the coolant covers the outer surface of the protection cover 1 during use, in order to reduce the influence of the protection cover 1 on the raw flow field, that is: the influence of the protective cover 1 on the flow of the coolant is avoided, and the inventor finds that the protective cover 1 is designed into an ellipsoidal shape and is in smooth transition after a plurality of times of design and test, so that the influence on a flow field can be reduced; meanwhile, under the condition that the high-temperature and high-pressure sensor can be placed in the protective cover, the height of the protective cover 1 is set to be less than 5% of the width height of the original flow field, the radius of the protective cover 1 is set to be more than 10 times of the height of the protective cover 1, and the influence on the original flow field can be basically ignored in engineering. Simultaneously for making high temperature high pressure sensor measuring pressure data more accurate, measure the through-hole and set up in the center of safety cover 1 to when avoiding high temperature high pressure sensor to set up in 1 side of ellipsoid safety cover, cause because of the flow of ellipsoid safety cover 1 to the coolant and block, make the inaccurate condition of measuring result.

In addition, because the high-temperature and high-pressure sensor is arranged in the protective cover 1, and the cooling water in the protective cover 1 is basically dead water, the pressure sensor wire 4 can be effectively prevented from being damaged due to the fact that the pressure sensor wire 4 is flushed by coolant when the pressure sensor is used specifically.

In addition, in order to avoid that the hollow bolt 3 is loosened and falls off with the measurement through hole due to the fact that the cooling water erodes the protection cover 1 for a long time, the inner surface of the protection cover 1 is further provided with a fixing device 5 for fixing a pressure sensor lead 4 positioned in the protection cover 1, so that the falling risk is reduced, or when the pressure sensor lead 4 falls off, the pressure sensor head 2 is protected through the fixed sensor lead 4, the pressure sensor head 2 which falls off is prevented from touching the structure surface, and the pressure sensor head 2 is damaged.

Further, considering that the pressure sensor wire 4 is exposed at the bottom of the hollow bolt 3, a certain distance exists between the sensor wire and the top of the protection cover 1, and if the pressure sensor wire 4 is directly fixed at the top of the protection cover 1, the pressure sensor wire 4 is bent to some extent, which easily causes the bent portion to be broken. Therefore, in the embodiment, the fixing device 5 is provided in two parts, as shown in fig. 1 and 2, one of which is provided on the top of the protection cover 1, and the other is provided on the side wall of the protection cover 1. Specifically, the fixed seat is arranged at the top, so that the height of the fixed seat is slightly higher than the bottom of the hollow bolt 3, when the pressure sensor lead 4 is fixed, the pressure sensor lead 4 is not bent horizontally at a right angle, but the pressure sensor lead 4 is slowly bent horizontally after being vertically extended, and the bent part is prevented from being broken; all set up the joint spare on the medial surface of protective cover 1 and fixing base simultaneously, fix pressure sensor wire 4 through the joint spare, not only easy operation can also save operating time.

The following explains a method of assembling the pulsation pressure measuring apparatus of this embodiment:

(1) installing the pressure sensor head 2 into the hollow screw of the hollow bolt 3, and enabling the pressure sensor head 2 to be flush with the top of the hollow screw;

(2) fixing the hollow bolt 3 to the protective cover 1 through the measuring through-hole, the sensitive surface of the pressure sensor head 2 is finally flush with the measuring through-hole, i.e.: the sensitive surface at the front end of the pressure sensor head 2 is ensured to be flush with the outer surface of the ellipsoidal protective cover 1, and the flow field is not influenced by the concave-convex phenomenon, so that the accuracy of the pulsating pressure measurement data is ensured;

(3) the pressure sensor wires 4 located inside the ellipsoidal protective cover 1 are fixed to the inner surface of the ellipsoidal protective cover 1.

Example 2

The embodiment provides a use method of a pulsating pressure measuring device, which comprises the following sub-steps:

s1: fixing the protective cover 1 on the outer surface of the measuring structure in a spot welding mode;

s2: leading the high-temperature high-pressure sensor lead exposed out of the protective cover out of the pressure container and connecting the high-temperature high-pressure sensor lead into a measurement system;

s3: starting measurement and recording a pressure signal;

s4: and (5) finishing measurement, polishing the spot welding part, and removing the pulsating pressure measuring device.

Among them, it is worth mentioning: in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention in its spirit and scope. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.