CN112378765B

CN112378765B - Pressurization test device of cladding pipe

Info

Publication number: CN112378765B
Application number: CN202011075199.6A
Authority: CN
Inventors: 汪峰; 李怀林; 曹鑫源
Original assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Current assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2022-12-16
Anticipated expiration: 2040-10-09
Also published as: CN112378765A

Abstract

The invention discloses a pressurization test device of a cladding tube, which comprises a test frame, a test tube, a first sealing element, a second sealing element, a third sealing element and a fourth sealing element, wherein the test tube is arranged on the test frame, the test tube is sleeved on one part of the cladding tube, the first part of the cladding tube extends out of the test tube from the first end of the test tube, the second part of the cladding tube extends out of the test tube from the second end of the test tube, a test cavity is defined between the test tube and the cladding tube, the outer peripheral surface of the test tube is provided with a water inlet and a water outlet which are communicated with the test cavity, the first sealing element is sleeved on the first end and the first part of the test tube, the second sealing element is sleeved on the second end and the second part of the test tube, the third sealing element is arranged on the first end of the cladding tube, and the fourth sealing element is arranged on the second end of the cladding tube. The pressurization test device of the cladding tube can perform a simulation test of in-tube pressurization on the cladding tube in the environment of high temperature and high pressure water.

Description

Pressurization test device of cladding pipe

Technical Field

The invention relates to the technical field of tests, in particular to a pressurization test device for a cladding tube.

Background

The cladding tube of the pressurized water reactor fuel is in the environment of high temperature and high pressure water, and under the condition of normal operation working condition, the pressure generated by fission gas exists in the tube. Under the condition of an accident working condition, the pressure in the cladding pipe rises sharply, and serious threat can be caused to the safe operation of the nuclear power station.

In order to test the service performance of the cladding pipe material of the pressurized water reactor nuclear power station, a simulation test device for pressurizing the cladding pipe in a high-temperature and high-pressure water environment is needed.

Disclosure of Invention

To this end, an embodiment of the present invention proposes a pressurization test apparatus for a cladding pipe, which is capable of performing a simulation test of in-pipe pressurization of the cladding pipe in an environment of high temperature and high pressure water.

The pressurization test device for the cladding tube according to the embodiment of the invention comprises: a test frame; the test tube is arranged on the test frame, the test tube can be sleeved on one part of the cladding tube, the test tube is provided with a first end and a second end which are opposite in the length direction, the cladding tube is provided with a first end and a second end which are opposite in the length direction, the first part of the cladding tube can extend out of the test tube from the first end of the test tube, the second part of the cladding tube can extend out of the test tube from the second end of the test tube, a test cavity can be defined between the test tube and the cladding tube, the test cavity is provided with a first end and a second end which are opposite in the length direction of the test tube, and the outer peripheral surface of the test tube is provided with a water inlet and a water outlet which are communicated with the test cavity; a first seal fitted over the first end of the test tube and the first portion to close the first end of the test chamber and a second seal fitted over the second end of the test tube and the second portion to close the second end of the test chamber; and a third seal provided at the first end of the cladding tube so as to be able to close the first end of the cladding tube, and a fourth seal provided at the second end of the cladding tube so as to be able to close the second end of the cladding tube.

According to the pressurization test device for the cladding tube, provided by the embodiment of the invention, the high-temperature and high-pressure water is introduced into the test cavity, so that the cladding tube can be in the environment of high-temperature and high-pressure water for pressurization test, and the test accuracy can be improved. And the high-temperature high-pressure water in the test cavity enters from the water inlet and flows out from the water outlet, so that the high-temperature high-pressure water in the test cavity is circulating water with stable temperature and pressure, and the cladding tube can be ensured to be in a stable high-temperature high-pressure water environment. The first end of the test cavity and the second end of the test cavity are sealed through the first sealing element and the second sealing element respectively, so that high-temperature and high-pressure water in the test cavity can be prevented from leaking, and the high-temperature and high-pressure water environment in the test cavity is further maintained. Through setting up the third sealing member and the fourth sealing member is sealed, can avoid carrying out the pressure leakage in the cladding pipe when pressurization test, avoid taking place explosion danger, can guarantee experimental accuracy moreover.

In some embodiments, the pressurization test device for the cladding tube further comprises a first cooling jacket and a second cooling jacket, both of which are sleeved on the test tube, wherein the first cooling jacket is located between the water outlet and the first sealing element in the length direction of the test tube, the second cooling jacket is located between the water inlet and the second sealing element in the length direction of the test tube,

optionally, the first cooling jacket is spaced from the water outlet by a first preset distance, and the second cooling jacket is spaced from the water inlet by a second preset distance.

In some embodiments, the apparatus for pressure testing of a cladding tube further comprises:

a first explosion-proof sleeve having a first end and a second end opposite to each other in a length direction of the test tube, the first explosion-proof sleeve being capable of being sleeved on the first portion, the first end of the cladding tube being capable of being flush with an end of the first explosion-proof sleeve, or the first end of the cladding tube being capable of being positioned within the first explosion-proof sleeve, the test tube being sleeved on a portion of the first explosion-proof sleeve, the third sealing member being sleeved on the first end of the first explosion-proof sleeve, the third sealing member covering the first end of the first explosion-proof sleeve, the first sealing member being sleeved on the first explosion-proof sleeve; and

the second explosion-proof sleeve is provided with a first end and a second end which are opposite to each other in the length direction of the test tube, the second explosion-proof sleeve can be sleeved on the second part, the second end of the cladding tube can be flush with the end part of the second end of the second explosion-proof sleeve, or the second end of the cladding tube can be positioned in the second explosion-proof sleeve, the test tube is sleeved on one part of the second explosion-proof sleeve, the fourth sealing element is sleeved on the second end of the second explosion-proof sleeve, the fourth sealing element covers the second end of the second explosion-proof sleeve, and the second sealing element is sleeved on the second explosion-proof sleeve.

In some embodiments, the pressurizing test device for the cladding tube further comprises a heating element, the heating element is sleeved on the test tube, and the heating element is positioned between the water inlet and the water outlet in the length direction of the test tube.

In some embodiments, the apparatus for pressure testing of a cladding tube further comprises a gas supply tube having one end passing through the third seal, the one end of the gas supply tube being capable of communicating with the second end of the cladding tube.

In some embodiments, the inner circumferential surface of the test tube has a first annular groove and a second annular groove, the first annular groove and the second annular groove are arranged at intervals in the length direction of the test tube, the inner end of the water outlet is opened on the bottom wall surface of the first annular groove, and the inner end of the water inlet is opened on the bottom wall surface of the second annular groove.

In some embodiments, the cladding tube pressurization test apparatus further comprises a temperature detector disposed within the water inlet or within a portion of the test chamber adjacent the water inlet.

In some embodiments, the heating member includes a heat conductor, a heating layer and a heat preservation layer, the heat conductor the heating layer with the heat preservation layer is the annular, the heat conductor cover is established on the test tube, the heating layer cover is established on the heat conductor, the heat preservation layer cover is established on the heating layer.

In some embodiments, the test rack comprises a first support plate, a second support plate and a plurality of pillars, the length direction of the pillars is parallel to the length direction of the test tube, the first support plate and the second support plate are arranged on each pillar at intervals along the length direction of the test tube, wherein the first end of the test tube is connected with the first support plate, and the second end of the test tube is connected with the second support plate.

In some embodiments, the test rack further comprises a first pressure plate and a second pressure plate provided on each of the pillars at a distance along the length of the test tube, wherein the third seal and the fourth seal are located between the first pressure plate and the second pressure plate along the length of the test tube, the first pressure plate pressing on the third seal and the second pressure plate pressing on the fourth seal.

Drawings

FIG. 1 is a schematic structural view of a pressurization test apparatus for a cladding pipe in an embodiment of the present invention.

Fig. 2 is a partial enlarged view at a in fig. 1.

Fig. 3 is a partial enlarged view at B in fig. 1.

Fig. 4 is a partial enlarged view at C in fig. 1.

Fig. 5 is a partial enlarged view at D in fig. 1.

Reference numerals:

a test stand 100; a pillar 101; a first support plate 102; a second support plate 103; a first platen 104; a second platen 105; a first nut 106; a second nut 107; a third nut 108; a fourth nut 109;

a test tube 200; a water outlet 201; a water inlet 202; a first annular groove 203; a second annular groove 204; a first connecting member 205; a second connector 206; a test chamber 210; a high temperature zone 211; a first low temperature zone 212; a second low temperature zone 213;

a cladding tube 300; a first portion 301; a second portion 302;

a heating member 400; a thermal conductor 401; a heating layer 402; an insulating layer 403;

a first seal 500; a second seal member 600; a third seal 700; a fourth seal 800; a gas supply pipe 900; a first cooling jacket 1000; a first circulation chamber 1001; a first circulating water port 1002; a second cooling jacket 1100; a second circulation chamber 1101; a second circulation water gap 1102; a first explosion proof sleeve 1200; a second explosion proof sleeve 1300.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

As shown in fig. 1 to 5, a pressurization test apparatus 001 of a cladding tube according to an embodiment of the present invention includes a test rack 100, a test tube 200, a first sealing member 500, a second sealing member 600, a third sealing member 700, and a fourth sealing member 800.

As shown in fig. 1-3, the cladding tube 300 has first 303 and second 304 ends opposite in its length direction. A test tube 200 is provided on the test stand 100 and the test tube 200 is capable of fitting over a portion of the cladding tube 300, the test tube 200 having first and

second ends

207, 208 opposite in its length direction. A first portion 301 of the cladding tube 300 can extend out of the test tube 200 from the first end 207 of the test tube 200 and a second portion 302 of the cladding tube 300 can extend out of the test tube 200 from the second end 208 of the test tube 200.

The meaning of the term "can" is explained below by taking as an example "the test tube 200 can be fitted over a part of the cladding tube 300". The test tube 200 can be sleeved on a part of the cladding tube 300 by: when the cladding tube 300 is subjected to the pressure test using the pressure test apparatus 001, the test tube 200 is fitted over a part of the cladding tube 300. When the pressure test of the cladding tube 300 is not performed by the pressure test apparatus 001, the test tube 200 may be fitted over a part of the cladding tube 300 or may not be fitted over a part of the cladding tube 300.

The ability of the first portion 301 of the cladding tube 300 to extend out of the test tube 200 from the first end 207 of the test tube 200 means: when the cladding tube 300 is pressure tested using the pressure test apparatus 001, a first portion 301 of the cladding tube 300 extends out of the test tube 200 from the first end 207 of the test tube 200. When the cladding tube 300 is not to be pressure tested using the pressure test apparatus 001, the first portion 301 of the cladding tube 300 may extend from the first end 207 of the test tube 200 to the test tube 200, or the first portion 301 of the cladding tube 300 may not extend from the first end 207 of the test tube 200 to the test tube 200.

The meaning of the term "can" is explained below by taking as an example that the second portion 302 of the cladding tube 300 is capable of extending the test tube 200 from the second end 208 of the test tube 200. The ability of the second portion 302 of the cladding tube 300 to extend out of the test tube 200 from the second end 208 of the test tube 200 means: when the cladding tube 300 is pressure tested using the pressure test apparatus 001, a second portion 302 of the cladding tube 300 extends out of the test tube 200 from the second end 208 of the test tube 200. When the cladding tube 300 is not pressure tested using the pressure test apparatus 001, the second portion 302 of the cladding tube 300 may extend from the second end 208 of the test tube 200 out of the test tube 200, or the second portion 302 of the cladding tube 300 may not extend from the second end 208 of the test tube 200 out of the test tube 200.

As shown in fig. 1-3, a test lumen 210 can be defined between the test tube 200 and the cladding tube 300. The test chamber 210 has a first end 214 and a second end 215 opposite to each other in the longitudinal direction of the test tube 200, and the test tube 200 is provided on the outer peripheral surface thereof with a water inlet 202 and a water outlet 201 communicating with the test chamber 210.

The meaning of the term "can" is explained below by taking as an example "the test chamber 210 can be defined between the test tube 200 and the cladding tube 300". The ability to define a test chamber 210 between the test tube 200 and the cladding tube 300 means: when the cladding tube 300 is pressure tested using the pressure testing apparatus 001, a test chamber 210 is defined between the test tube 200 and the cladding tube 300. When the cladding tube 300 is not pressure tested using the pressure testing apparatus 001, the test chamber 210 may be defined between the test tube 200 and the cladding tube 300, or the test chamber 210 may not be defined between the test tube 200 and the cladding tube 300.

As shown in FIGS. 1-3, a first seal 500 is fitted over the first end 207 and the first portion 301 of the test tube 200 to close the first end 214 of the test chamber 210. A second seal 600 is fitted over the second end of the test tube 200 and the second portion 302 to close the second end 215 of the test chamber 210. The first sealing member 500 and the second sealing member 600 seal the test chamber 210, so that the leakage of high-temperature and high-pressure water in the test chamber 210 can be avoided, and the high-temperature and high-pressure water environment in the test chamber 210 can be maintained.

As shown in fig. 1, 4 and 5, a third seal 700 can be provided at the first end 303 of the cladding 300 to enable closing of the first end 303 of the cladding 300 and a fourth seal 800 can be provided at the second end 304 of the cladding 300 to enable closing of the second end 304 of the cladding 300. Pressure leakage in the cladding tube 300 when performing the pressure test can thereby be avoided so that the accuracy of the test can be ensured.

The meaning of the term "can" is explained below by taking as an example that "the third seal 700 can be provided at the first end 303 of the cladding tube 300". The fact that a third seal 700 can be provided at the first end 303 of the cladding tube 300 so as to be able to close the first end 303 of the cladding tube 300 means: when the cladding tube 300 is pressure tested using the pressure test apparatus 001, a third seal 700 can be provided at the first end 303 of the cladding tube 300 to close the first end 303 of the cladding tube 300. When the cladding tube 300 is not pressure tested using the pressure testing apparatus 001, the third seal 700 may be provided at the first end 303 of the cladding tube 300 to close the first end 303 of the cladding tube 300, or the third seal 700 may not be provided at the first end 303 of the cladding tube 300.

The pressurization test device 001 of the cladding tube according to the embodiment of the invention is provided with the test tube 200, and the test cavity 210 is defined between the test tube 200 and the cladding tube 300, so that high-temperature high-pressure water can be introduced into the test cavity 210. The high-temperature and high-pressure water enters the test cavity 210 from the water inlet 202, and the high-temperature and high-pressure water in the test cavity 210 flows out of the test cavity 210 from the water outlet 201.

Therefore, when the cladding tube 300 is subjected to a pressure test, the cladding tube 300 is in an environment of high temperature and high pressure water, so that the actual working environment of the cladding tube 300 can be simulated more accurately, namely the actual working environment of the cladding tube 300 is the environment of high temperature and high pressure water. The service performance of cladding tube 300 can thereby be evaluated more accurately.

Therefore, the pressurization test device 001 of the cladding tube according to the embodiment of the invention has the advantages of high simulation accuracy, accurate test result and the like.

In order to make the technical solution of the present application easier to understand, the following further describes the technical solution of the present application by taking as an example that the test tube 200 and the cladding tube 300 both extend in the up-down direction (the longitudinal direction of the test tube 200 coincides with the up-down direction, and the longitudinal direction of the cladding tube 300 coincides with the up-down direction). The up-down direction is shown by arrow a in fig. 1.

As shown in fig. 1, the test stand 100 includes a first support plate 102, a second support plate 103, and a plurality of pillars 101. The length direction of each pillar 101 is parallel to the length direction of the test tube 200, i.e., each pillar 101 may extend in the up-down direction. A first support plate 102 and a second support plate 103 are provided on each of the pillars 101 at a spacing in the lengthwise direction of the test tube 200. Wherein a first end 207 (upper end) of the test tube 200 is connected to the first support plate 102 and a second end 208 (lower end) of the test tube 200 is connected to the second support plate 103. The test rack 100 can fixedly support the test tube 200.

As shown in fig. 2 and 3, the test tube 200 includes a first connector 205 and a second connector 206 spaced apart along the length of the test tube 200. The first connector 205 and the second connector 206 are located between the first support plate 102 and the second support plate 103 in the length direction of the test tube 200. The first connector 205 is connected to the first support plate 102 and the second connector 206 is connected to the second support plate 103. By providing the first connector 205 and the second connector 206, the test tube 200 can be more easily mounted on the test rack 100.

Further, each of the pillars 101 is provided with a first nut 106 and a second nut 107. The first support plate 102 and the second support plate 103 are located between the first nut 106 and the second nut 107 in the length direction of the test tube 200. The first nut 106 presses on the first support plate 102 and the second nut 107 presses on the second support plate 103. The first and

second nuts

106 and 107 can position the first and

second support plates

102 and 103 in the up-down direction, and further position the one connector 205 and the second connector 206 in the up-down direction, so as to position the test tube 200 in the up-down direction.

As shown in fig. 1-3, the test tube 200 is fitted over a portion of the cladding tube 300, i.e., the cladding tube 300 passes through the test tube 200. A first portion 301 of the cladding tube 300 extends from the test tube 200 at a first end (upper end) 207 of the test tube 200 and a second portion 302 of the cladding tube 300 extends from the test tube 200 at a second end 208 (lower end) of the test tube 200. The test tube 200 and the cladding tube 300 define a test cavity 210 therebetween, and the outer peripheral surface of the test tube 200 is provided with a water inlet 202 and a water outlet 201 which are communicated with the test cavity 210.

As shown in fig. 1, the test tube 200 is provided with a first annular groove 203 and a second annular groove 204 on the inner peripheral surface thereof, i.e., the test chamber 210 is provided with a first annular groove 203 and a second annular groove 204 on the outer peripheral surface thereof. The first annular groove 203 and the second annular groove 204 are arranged at intervals in the length direction of the test tube 200, the inner end of the water outlet 201 is arranged on the bottom wall surface of the first annular groove 203, and the inner end of the water inlet 202 is arranged on the bottom wall surface of the second annular groove 204.

Thus, the water inlet 202 communicates with the test chamber 210 through the first annular groove 203, and the water outlet 201 communicates with the test chamber 210 through the second annular groove 204. Through the arrangement of the first annular groove 203 and the second annular groove 204, the test chamber 210 can be prevented from being directly communicated with the water outlet 201 and the water inlet 202, particularly, the high-temperature region 211 of the test chamber 210 is prevented from being directly communicated with the water outlet 201 and the water inlet 202, so that the high-temperature and high-pressure water in the test chamber 210 (particularly, the high-temperature and high-pressure water in the high-temperature region 211) can have stable flow rate, the temperature and pressure changes of the high-temperature and high-pressure water in the test chamber 210 (particularly, the high-temperature and high-pressure water in the high-temperature region 211) caused by the changes of the flow rate are avoided, and the high-temperature and high-pressure water in the test chamber 210 (particularly, the high-temperature and high-pressure water in the high-temperature region 211) can have constant temperature and pressure.

As shown in fig. 1, the pressurization test apparatus 001 of the cladding tube according to the embodiment of the present invention further includes a heating element 400, the heating element 400 is sleeved on the test tube 200, and the heating element 400 is located between the water inlet 202 and the water outlet 201 in the length direction of the test tube 200. The heating member 400 is capable of heating and/or insulating the high temperature and high pressure water in the test chamber 210 between the water inlet 202 and the water outlet 201.

Further, the high-temperature and high-pressure water is preheated before being introduced into the test chamber 210, the high-temperature and high-pressure water is heated to the temperature condition required by the test by the heating element 400 after being introduced into the test chamber 210, the high-temperature and high-pressure water is heated twice to reach the temperature condition required by the test, the temperature in the test chamber 210 reaches the temperature condition required by the test only through two heating processes, the temperature change in the test chamber 210 is slowed down, and the violent temperature change in the test chamber 210 is avoided. It can be understood that the heating element 400 can also preheat the test tube 200 and the cladding tube 300, and when high-temperature and high-pressure water is introduced into the test cavity 210, the temperature in the test cavity 210 is prevented from changing violently, so that the inaccurate evaluation on the service performance of the cladding tube 300 due to the influence on the performance of the cladding tube 300 is avoided.

As shown in fig. 1, the heating member 400 includes a heat conductor 401, a heating layer 402, and an insulating layer 403. The heat conductor 401, the heating layer 402 and the insulating layer 403 are all annular. The heat conductor 401 is sleeved on the test tube 200, the heating layer 402 is sleeved on the heat conductor 401, and the heat preservation layer 403 is sleeved on the heating layer 402. That is, the heat conductor 401, the heating layer 402, and the insulating layer 403 are sequentially provided from the inside to the outside. The provision of the insulating layer 403 can avoid heat loss of the heating layer 402.

The pressurization test apparatus 001 of the cladding pipe of the embodiment of the present invention further includes a temperature detector. A temperature detector is provided in the water inlet 202 or in a portion of the test chamber 210 adjacent the water inlet 202. The temperature detector can detect the temperature of the high-temperature and high-pressure water in the high-temperature area 211 of the test chamber 210 in real time and continuously, and when the temperature of the high-temperature and high-pressure water deviates from the temperature required by the test, the temperature of the high-temperature and high-pressure water can be adjusted in time through the heating element 400.

Further, a pressure detector is provided within the water inlet 202 or within a portion of the test chamber 210 adjacent the water inlet 202. The pressure detector can continuously detect the pressure of the high-temperature high-pressure water in the test chamber 210 in real time, and can adjust the pressure of the high-temperature high-pressure water according to the water inlet speed and the water outlet speed in time when the pressure of the high-temperature high-pressure water has deviation from the pressure required by the test.

In some embodiments, as shown in fig. 1-3, the pressurization test apparatus 001 of the cladding tube according to the embodiment of the present invention further includes a first cooling jacket 1000 and a second cooling jacket 1100, and both the first cooling jacket 1000 and the second cooling jacket 1100 are sleeved on the test tube 200. The first cooling jacket 1000 is located between the water outlet 201 and the first sealing member 500 in the lengthwise direction of the test tube 200, and the second cooling jacket 1100 is located between the water inlet 202 and the second sealing member 600 in the lengthwise direction of the test tube 200. In other words, the first cooling jacket 1000 is located above the water outlet 201, and the second cooling jacket 1100 is located below the water inlet 202.

The first cooling jacket 1000 may cool the high temperature and high pressure water in the test chamber 210 adjacent to the first seal 500, and the second cooling jacket may cool the high temperature and high pressure water in the test chamber 210 adjacent to the second seal 600. Therefore, the first sealing element 500 and the second sealing element 600 can be contacted with water at a lower temperature, the sealing performance of the first sealing element 500 and the second sealing element 600 can be prevented from being damaged by the high-temperature water, the sealing performance of the test cavity 210 and the pressurization test device 001 can be improved, and the leakage of the pressurization test device can be prevented.

Since the temperature of water (high temperature and high pressure water) in the test chamber 210 opposite to the heating member 400 is higher than the temperature of water in the test chamber 210 opposite to the first cooling jacket 1000 and the second cooling jacket 1100, the test chamber 210 includes the high temperature zone 211, the first low temperature zone 212, and the second low temperature zone 213. Specifically, a high temperature zone 211 is formed between the water inlet 202 and the water outlet 201, the high temperature zone 211 corresponds to the heating member 400, and a portion of the cladding tube 300 opposite to the high temperature zone 211 is a test sampling portion. A first low temperature zone 212 is formed between the water outlet 201 and a first end (upper end) 214 of the test chamber 210, the first low temperature zone 212 corresponding to the first cooling jacket 1000. A second low temperature zone 213 is formed between the water inlet 202 and a second end (lower end) 215 of the test chamber 210, the second low temperature zone 213 corresponding to the second cooling jacket 1100. The first low temperature zone 212 and the second low temperature zone 213 can facilitate sealing of the test chamber 210.

Further, as shown in fig. 1, the first cooling jacket 1000 is spaced apart from the water outlet 201 by a first predetermined distance, and the second cooling jacket 1100 is spaced apart from the water inlet 202 by a second predetermined distance. Therefore, the first cooling jacket 1000 and the second cooling jacket 1100 can be prevented from cooling the high-temperature and high-pressure water between the water outlet 201 and the water inlet 202, and the high-temperature and high-pressure water in the test cavity 210 between the water inlet 202 and the water outlet 201 is always in the test condition of the pressurization test device 001 of the cladding tube in the embodiment of the invention.

Further, as shown in fig. 2 and 3, the first cooling jacket 1000 has a first circulation chamber 1001, first circulation water ports 1002 are provided at both ends of the first circulation chamber 1001, circulation cooling water is introduced into the first circulation chamber 1001 of the first cooling jacket 1000 from the first circulation water port 1002 at one end, and the circulation cooling water in the first circulation chamber 1001 of the first cooling jacket 1000 flows out from the first circulation water port 1002 at the other end. The second cooling jacket 1100 has a second circulation chamber 1101, the second circulation water port 1102 is provided at both ends of the second circulation chamber 1101, the circulation cooling water is introduced into the second circulation chamber 1101 of the second cooling jacket 1100 through the second circulation water port 1102 at one end, and the circulation cooling water in the second circulation chamber 1101 of the second cooling jacket 1100 flows out through the second circulation water port 1102 at the other end. It is understood that other fluids may be introduced into the first and

second circulation chambers

1001 and 1101 as a cooling medium.

In some embodiments, as shown in fig. 1, the pressurization test apparatus 001 of the cladding tube of the embodiment of the present invention further includes a first explosion proof sleeve 1200 and a second explosion proof sleeve 1300.

As shown in fig. 2-5, the first explosion proof sleeve 1200 can be fitted over the first portion 301 of the cladding tube 300, the first end (upper end) 303 of the cladding tube 300 can be flush with the end of the first explosion proof sleeve 1200, or the first end (upper end) 303 of the cladding tube 300 can be located within the first explosion proof sleeve 1200. The test tube 200 is sleeved on a portion of the first explosion-proof sleeve 1200, i.e. the portion of the first explosion-proof sleeve 1200 extends into the test tube 200. The second explosion proof sleeve 1300 can be fitted over the second portion 302 of the cladding tube 300, the second end of the cladding tube 300 can be flush with the end of the second explosion proof sleeve 1300, or the second end (lower end) 304 of the cladding tube 300 can be located within the second explosion proof sleeve 1300. The test tube 200 is sleeved on a portion of the second explosion-proof sleeve 1300, i.e., the portion of the second explosion-proof sleeve 1300 extends into the test tube 200.

The pressurization test device 001 of the cladding tube provided by the embodiment of the invention surrounds the cladding tube 300 through the first explosion-proof sleeve 1200, the second explosion-proof sleeve 1300 and the test tube 200, and when the cladding tube 300 is exploded accidentally, fragments generated by explosion of the cladding tube 300 can be blocked, so that damage to testers and test instruments is avoided.

The meaning of the term "can" is explained below by taking as an example that the first explosion proof sleeve 1200 can be sleeved on the first portion 301 of the cladding tube 300. The first explosion-proof sleeve 1200 can be sleeved on the first part 301 of the cladding tube 300 by: when the cladding tube 300 is subjected to a pressure test by using the pressure test apparatus 001, the first explosion-proof sleeve 1200 can be sleeved on the first portion 301 of the cladding tube 300, i.e., the first end (upper end) 303 of the cladding tube 300 can be flush with the end of the first explosion-proof sleeve 1200, or the first end (upper end) 303 of the cladding tube 300 can be located inside the first explosion-proof sleeve 1200. When the pressure test device 001 is not used for the pressure test of the cladding tube 300, the first explosion-proof sleeve 1200 may be sleeved on the first portion 301 of the cladding tube 300, or the first explosion-proof sleeve 1200 may not be sleeved on the first portion 301 of the cladding tube 300.

The meaning of the term "can" is explained below by taking as an example that the second explosion-proof sleeve 1300 can be sleeved on the second portion 302 of the cladding 300. The fact that the second explosion-proof sleeve 1300 can be sleeved on the second portion 302 of the cladding tube 300 means that: when the cladding tube 300 is subjected to a pressure test by using the pressure test apparatus 001, the second explosion-proof sleeve 1300 can be sleeved on the second portion 302 of the cladding tube 300, i.e., the second end of the cladding tube 300 can be flush with the end of the second explosion-proof sleeve 1300, or the second end (lower end) 304 of the cladding tube 300 can be located inside the second explosion-proof sleeve 1300. When the cladding tube 300 is not pressurized by the pressurization test device 001, the second explosion-proof sleeve 1300 may be sleeved on the second portion 302 of the cladding tube 300, or the second explosion-proof sleeve 1300 may not be sleeved on the second portion 302 of the cladding tube 300.

As shown in fig. 2 and 4, the first flameproof sleeve 1200 has first and

second ends

1201, 1202 opposite one another in the lengthwise direction of the test tube 200, with a third seal 700 fitted over the first end (upper end) 1201 of the first flameproof sleeve 1200, with the third seal 700 covering the first end 1201 of the first flameproof sleeve 1200 so that the third seal 700 can seal the first end (upper end) 303 of the cladding tube 300.

The second end (lower end) 1202 of the first explosion proof sleeve 1200 is located within the test tube 200, i.e. the test tube 200 is sleeved on the second end 1202 of the first explosion proof sleeve 1200. The first seal 500 is fitted over the first explosion proof sleeve 1200. In other words, the first seal 500 is fitted over the first end (upper end) 207 of the test tube 200 and the first flameproof sleeve 1200 so that the first seal 500 can seal against the first end (upper end) 214 of the test chamber 210.

As shown in fig. 3 and 5, the second explosion-proof sleeve 1300 has a first end 1301 and a second end 1302 opposite to each other in the length direction of the test tube 200, the fourth seal 800 is fitted over the second end (lower end) 1302 of the second explosion-proof sleeve 1300, and the fourth seal 800 covers the second end (lower end) 1302 of the second explosion-proof sleeve 1300 so that the fourth seal 800 can seal the second end (lower end) 304 of the cladding tube 300.

The first end (upper end) 1301 of the second explosion-proof sleeve 1300 is located in the test tube 200, i.e. the test tube 200 is sleeved on the first end (upper end) 1301 of the second explosion-proof sleeve 1300. The second seal 600 is fitted over the second explosion proof sleeve 1300. In other words, the second seal 600 fits over the second end (lower end) 208 of the test tube 200 and the second flameproof sleeve 1300 so that the second seal 600 can seal against the second end (lower end) 215 of the test chamber 210.

In some embodiments, as shown in fig. 1, the test rack 100 further comprises a first platen 104 and a second platen 105. A first pressure plate 104 and a second pressure plate 105 are provided on each of the columns 101 at intervals in the length direction of the test tube 200. The third seal 700 and the fourth seal 800 are located between the first platen 104 and the second platen 105 in the length direction of the test tube 200. The first platen 104 presses against the third seal 700 and the second platen 105 presses against the fourth seal 800. The first and second

pressing plates

104 and 105 can improve the sealing reliability of the third and

fourth seals

700 and 800, respectively.

Further, as shown in fig. 1, a third nut 108 and a fourth nut 109 are provided on each pillar 101. The first and

second platens

104, 105 are located between the third and

fourth nuts

108, 109 in the length direction of the test tube 200. The third nut 108 presses on the first pressure plate 104 and the fourth nut 109 presses on the second pressure plate 105. The third and

fourth nuts

108 and 109 position and compress the first and

second platens

104 and 105 in the up-down direction to position and compress the third and

fourth seals

700 and 800 in the up-down direction.

As shown in fig. 2, the first seal 500 includes a first annular portion 501 that is fitted over the first end (upper end) 207 of the test tube 200 and a second annular portion 502. The outer end of the second annular portion 502 is connected to the first annular portion 501, and the second annular portion 502 is sleeved on the first explosion-proof sleeve 1200.

As shown in fig. 3, the second seal 600 includes a third annular portion 601 that is fitted over the second end (lower end) 208 of the test tube 200 and a fourth annular portion 602. The outer end of the fourth annular portion 602 is connected to the third annular portion 601, and the fourth annular portion 602 is sleeved on the first explosion-proof sleeve 1200.

As shown in fig. 4, the third seal 700 includes a fifth annular portion 701 and a first plate portion 702, the fifth annular portion 701 fitting over a first end (upper end) 1201 of the first flameproof sleeve 1200. The edge of the first plate portion 702 is connected to the fifth annular portion 701, and the first plate portion 702 covers the first end (upper end) 1201 of the first explosion-proof sleeve 1200.

As shown in fig. 5, the fourth seal 800 includes a sixth annular portion 801 and a second plate portion 802, the sixth annular portion 801 being fitted over a second end (lower end) 1302 of the second explosion-proof sleeve 1300. The edge of the second plate portion 802 is connected to the sixth annular portion 801, and the second plate portion 802 covers the second end (lower end) 1302 of the second explosion-proof casing 1300.

In some embodiments, as shown in fig. 1, the pressure test apparatus 001 of the cladding tube of the embodiments of the present invention further comprises a gas supply tube 900. One end of the air supply pipe 900 passes through the third sealing member 700, and one end of the air supply pipe 900 communicates with the second end of the wrapper tube 300. Thereby, high-pressure gas can be introduced into the wrapper tube 300 through the gas supply pipe 900, so that high-pressure gas can be more conveniently supplied into the wrapper tube 300.

The gas supply line 900 is connected to a pressurization circuit having a solenoid valve and a gas source for introducing high pressure gas into the cladding tube 300. In addition, the gas supply pipe 900 may be connected to a gas storage tank storing high-pressure gas.

A specific exemplary cladding tube pressurization test apparatus according to the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the pressurization test apparatus 001 of the cladding pipe includes a test stand 100, a test pipe 200, a heating element 400, a first sealing member 500, a second sealing member 600, a third sealing member 700, a fourth sealing member 800, a first cooling jacket 1000, a second cooling jacket 1100, a first explosion-proof sleeve 1200, a second explosion-proof sleeve 1300, a heating element 400, and an air supply pipe 900.

The test stand 100 includes a first support plate 102, a second support plate 103, and a plurality of support posts 101. The length direction of the pillars 101 is parallel to the up-down direction in fig. 1, and a first support plate 102 and a second support plate 103 are provided on each pillar 101 at a spacing in the up-down direction. The upper end of the test tube 200 is connected to the first support plate 102, and the lower end of the test tube 200 is connected to the second support plate 103.

The test tube 200 includes a first connector 205 and a second connector 206 arranged at an interval in the up-down direction. The first connector 205 and the second connector 206 are located between the first support plate 102 and the second support plate 103 in the up-down direction. The first connector 205 is connected to the first support plate 102 and the second connector 206 is connected to the second support plate 103. By providing the first connector 205 and the second connector 206, the test tube 200 can be more easily mounted on the test rack 100.

Each post 101 is provided with a first nut 106 and a second nut 107. The first support plate 102 and the second support plate 103 are located between the first nut 106 and the second nut 107 in the up-down direction. The first nut 106 presses on the upper side of the first support plate 102 to position the first support plate 102 downward, and the second nut 107 is positioned on the lower side of the second support plate 103 to position the second support plate 103 upward.

The test tube 200 is fitted over a portion of the cladding tube 300. A first portion 301 of the cladding tube 300 extends from the upper end of the test tube 200 out of the test tube 200 and a second portion 302 of the cladding tube 300 extends from the lower end of the test tube 200 out of the test tube 200 defining a test cavity 210 between the test tube 200 and the cladding tube 300. The outer peripheral surface of the test tube 200 is provided with a water inlet 202 and a water outlet 201 which are communicated with the test cavity 210.

The inner peripheral surface of the test tube 200 has a first annular groove 203 and a second annular groove 204. The first annular groove 203 and the second annular groove 204 are arranged at intervals in the length direction of the test tube 200, the inner end of the water outlet 201 is arranged on the bottom wall surface of the first annular groove 203, and the inner end of the water inlet 202 is arranged on the bottom wall surface of the second annular groove 204.

The heating member 400 is sleeved on the test tube 200, and the heating member 400 is positioned between the water inlet 202 and the water outlet 201 in the up-down direction. The heating member 400 includes a heat conductor 401, a heating layer 402, and an insulating layer 403. The heat conductor 401, the heating layer 402 and the insulating layer 403 are all annular. The heat conductor 401 is sleeved on the test tube 200, the heating layer 402 is sleeved on the heat conductor 401, and the heat preservation layer 403 is sleeved on the heating layer 402.

A temperature detector and a pressure detector are provided within the water inlet 202 or within a portion of the test chamber 210 adjacent the water inlet 202.

The test chamber 210 includes a high temperature zone 211, a first low temperature zone 212, and a second low temperature zone 213. The high temperature region 211 is formed between the water inlet 202 and the water outlet 201, the high temperature region 211 corresponds to the heating member 400, and a portion of the cladding tube 300 located at the high temperature region 211 is a test sampling portion.

The first cooling jacket 1000 and the second cooling jacket 1100 are both sleeved on the test tube 200. The first seal 500 is fitted over the upper end of the test tube 200 and the first portion 301 of the cladding tube 300. A second seal 600 is fitted over the second end of the test tube 200 and the second portion 302 of the cladding tube 300. The first cooling jacket 1000 is located between the water outlet 201 and the first sealing member 500 in the up-down direction, and the second cooling jacket 1100 is located between the water inlet 202 and the second sealing member 600 in the up-down direction. The first cooling jacket 1000 is spaced a first predetermined distance from the water outlet 201, and the second cooling jacket 1100 is spaced a second predetermined distance from the water inlet 202.

A first low temperature zone 212 is formed between the water outlet 201 and the first end of the test tube 200, the first low temperature zone 212 corresponding to the first cooling jacket 1000. A second low temperature zone 213 is formed between the water inlet 202 and the second end of the test tube 200, the second low temperature zone 213 corresponding to the second cooling jacket 1100.

A first explosion proof sleeve 1200 is fitted over at least a portion of the first section 301 of the cladding tube 300 and the test tube 200 is fitted over a portion of the first explosion proof sleeve 1200. A second explosion proof sleeve 1300 is fitted over at least a portion of the second portion 302 and the test tube 200 is fitted over a portion of the second explosion proof sleeve 1300. A third seal 700 is provided at the upper end of the cladding tube 300 and a fourth seal 800 is provided at the lower end of the cladding tube 300. The third sealing element 700 is sleeved on the upper end of the first explosion-proof sleeve 1200, the first sealing element 500 is sleeved on the first explosion-proof sleeve 1200, and the lower end of the first explosion-proof sleeve 1200 is located in the test tube 200. The fourth sealing element 800 is sleeved on the lower end of the second explosion-proof sleeve 1300, the second sealing element 600 is sleeved on the second explosion-proof sleeve 1300, and the upper end of the second explosion-proof sleeve 1300 is located in the test tube 200.

The test rack 100 also includes a first platen 104 and a second platen 105. A first presser plate 104 and a second presser plate 105 are provided on each of the columns 101 at a spacing in the up-down direction. The third seal 700 and the fourth seal 800 are located between the first platen 104 and the second platen 105 in the up-down direction. The first platen 104 is pressed above the third seal 700 and the second platen 105 is pressed below the fourth seal 800.

A third nut 108 and a fourth nut 109 are also provided on each post 101. The first presser plate 104 and the second presser plate 105 are located between the third nut 108 and the fourth nut 109 in the up-down direction. The third nut 108 presses on top of the first platen 104 and the fourth nut 109 presses on bottom of the second platen 105.

One end of the air supply pipe 900 passes through the third seal 700, and one end of the air supply pipe 900 communicates with the second end of the wrapper tube 300. The gas supply pipe 900 is connected to a pressurization circuit, and high-pressure gas is introduced into the cladding pipe 300 to make the pressure of the cladding pipe 300 reach the conditions required by the test.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A device for pressure testing of cladding tubes, comprising:

a test stand;

the test tube is arranged on the test frame, the test tube can be sleeved on one part of the cladding tube, the test tube is provided with a first end and a second end which are opposite in the length direction, the cladding tube is provided with a first end and a second end which are opposite in the length direction, the first part of the cladding tube can extend out of the test tube from the first end of the test tube, the second part of the cladding tube can extend out of the test tube from the second end of the test tube, a test cavity can be defined between the test tube and the cladding tube, the test cavity is used for introducing high-temperature and high-pressure water which simulates the actual working environment of the cladding tube, the test cavity is provided with a first end and a second end which are opposite in the length direction of the test tube, and the outer peripheral surface of the test tube is provided with a water inlet and a water outlet which are communicated with the test cavity;

a first seal fitted over the first end of the test tube and the first portion to close the first end of the test chamber and a second seal fitted over the second end of the test tube and the second portion to close the second end of the test chamber; and

a third seal capable of being provided at the first end of the cladding tube so as to be able to close the first end of the cladding tube, and a fourth seal capable of being provided at the second end of the cladding tube so as to be able to close the second end of the cladding tube;

the heating element is sleeved on the test tube and is positioned between the water inlet and the water outlet in the length direction of the test tube;

the temperature detector is arranged in the water inlet or in a part of the test cavity adjacent to the water inlet;

an air supply tube having one end passing through the third seal, the one end of the air supply tube being communicable with a second end of the cladding tube.

2. The cladding tube pressurization test device according to claim 1, further comprising a first cooling jacket and a second cooling jacket, wherein the first cooling jacket and the second cooling jacket are both sleeved on the test tube, wherein the first cooling jacket is located between the water outlet and the first sealing member in the length direction of the test tube, the second cooling jacket is located between the water inlet and the second sealing member in the length direction of the test tube,

the first cooling jacket and the water outlet are separated by a first preset distance, and the second cooling jacket and the water inlet are separated by a second preset distance.

3. The cladding tube pressurization test apparatus according to claim 1, further comprising:

the first explosion-proof sleeve is provided with a first end and a second end which are opposite to each other in the length direction of the test tube, the first explosion-proof sleeve can be sleeved on the first part, the first end of the cladding tube can be flush with the end part of the first end of the first explosion-proof sleeve, or the first end of the cladding tube can be positioned in the first explosion-proof sleeve, the test tube is sleeved on one part of the first explosion-proof sleeve, the third sealing element is sleeved on the first end of the first explosion-proof sleeve, the third sealing element covers the first end of the first explosion-proof sleeve, and the first sealing element is sleeved on the first explosion-proof sleeve; and

4. The pressurization test device for the cladding pipe according to any one of claims 1 to 3, wherein a first annular groove and a second annular groove are provided on an inner peripheral surface of the test pipe, the first annular groove and the second annular groove are arranged at an interval in a length direction of the test pipe, an inner end of the water outlet is opened on a bottom wall surface of the first annular groove, and an inner end of the water inlet is opened on a bottom wall surface of the second annular groove.

5. The pressurization test device of a cladding tube according to claim 1, wherein the heating element comprises a heat conductor, a heating layer and a heat preservation layer, the heat conductor, the heating layer and the heat preservation layer are all in a ring shape, the heat conductor is sleeved on the test tube, the heating layer is sleeved on the heat conductor, and the heat preservation layer is sleeved on the heating layer.

6. The device for the pressure test of a cladding tube according to any one of claims 1 to 3, wherein the test frame comprises a first support plate, a second support plate and a plurality of pillars, the length direction of each pillar being parallel to the length direction of the test tube, the first support plate and the second support plate being provided on each pillar at a spacing along the length direction of the test tube, wherein a first end of the test tube is connected to the first support plate, and a second end of the test tube is connected to the second support plate.

7. The tube pressurization test apparatus according to claim 6, wherein the test rack further includes a first pressing plate and a second pressing plate provided on each of the pillars at a distance along a length direction of the test tube, wherein the third seal and the fourth seal are located between the first pressing plate and the second pressing plate in the length direction of the test tube, the first pressing plate pressing on the third seal, the second pressing plate pressing on the fourth seal.