internal pressure test furnace

Abstract

The present application relates to testing or analyzing materials by means of determining chemical or physical properties of the materials, and in particular to an internal pressure test furnace and a test method thereof. The internal pressure test furnace comprises a furnace body, a rotating shaft, and a pressure medium providing part. The furnace body defines a sealed furnace chamber. The rotating shaft extends downwardly from a bottom wall of the furnace body for driving the furnace body to rotate. The pressure medium providing part comprises a pressure supply pipeline and a pressure joint connected with the pressure supply pipeline. The pressure supply pipeline extends upwardly to the furnace chamber via an inside of the rotating shaft, and the rotating shaft is rotatable relative to the pressure supply pipeline. The pressure joint is used for sealingly connecting with a test sample to provide a pressure medium inside the test sample. A circumferential side wall of the furnace body is provided with a measurement window. The measurement window is configured to face the test sample sealingly connected with the pressure joint inside the furnace chamber. The internal pressure test furnace further comprises a measurement sensor arranged on the circumferential side wall of the furnace body and facing the measurement window, for measuring an outer shape profile data of the test sample inside the furnace chamber.

Description

TECHNICAL FIELD

[0001] The present application relates to testing or analyzing materials by means of determining chemical or physical properties of the materials, and in particular to an internal pressure test furnace. BACKGROUND

[0002] The reactor fuel cladding tube needs to be tested by internal pressure test before practical application and after irradiation due to the particularity of its application site to measure its mechanical properties. In the related art, the shape profile data of the test sample is measured after the internal pressure test of the test sample is completed, so that it is difficult to accurately obtain the shape profile data of the test sample under different test conditions. SUMMARY

[0003] To solve the above technical problems, the present application provides an internal pressure test furnace which can obtain the shape profile data of the test sample in real time. The present application also provides a test method of the internal pressure test furnace.

[0004] According to a first aspect of the present application, an internal pressure test furnace is provided, comprising: a furnace body, the furnace body comprising a top wall, a bottom wall and a circumferential side wall connecting the top wall and the bottom wall, the top wall, the bottom wall and the circumferential side wall together defining a sealed furnace cavity; a rotating shaft extending downward from the bottom wall of the furnace body for driving the furnace body to rotate; and a pressure medium providing part comprising a pressure supply pipeline and a pressure joint connected with the pressure supply pipeline, the pressure supply pipeline extending upward to the furnace cavity through the inside of the rotating shaft, and the rotating shaft being capable of rotating relative to the pressure supply pipeline, the pressure joint being used for sealingly connecting with the test sample to provide pressure medium to the inside of the test sample; wherein the circumferential side wall of the furnace body is provided with a measurement window, the measurement window being configured to face the test sample sealingly connected with the pressure joint in the furnace cavity; the internal pressure test furnace further comprises: a measurement sensor arranged on the circumferential side wall of the furnace body and facing the measurement window, for measuring the shape profile data of the test sample in the furnace cavity.

[0005] According to a second aspect of the present application, a test method of an internal pressure test furnace is provided, the internal pressure test furnace being the internal pressure test furnace of the first aspect of the present application, the test method comprising: sealingly connecting the test sample with the pressure joint of the internal pressure test furnace; closing the furnace cavity and heating and vacuumizing the furnace cavity, and then filling the test sample with pressure medium; driving the first temperature measuring part to move to contact the test sample to collect the first temperature of the test sample; adjusting the temperature of the second temperature measuring part according to the temperature detected by the first temperature measuring part; driving the first temperature measuring part to move to a position away from the test sample to adjust the power of the heating electrode according to the temperature of the second temperature measuring part; rotating the furnace body to measure the shape profile data of the test sample in the furnace cavity by using the measurement sensor.

[0006] The internal pressure test furnace of the embodiment of the application realizes real-time and accurate measurement of the test sample in the furnace cavity during the internal pressure test by setting the measurement sensor, the measurement window and the rotating shaft. BRIEF DESCRIPTION OF DRAWINGS

[0007] Other objects and advantages of the application will become apparent and the application will be best understood from the following description, taken in conjunction with the accompanying drawings.

[0008] Figure 1 is a structural schematic view of an internal pressure test furnace according to an embodiment of the application;

[0009] Figure 2 and Figure 3 are respectively Figure 1 are structural schematic views of the internal pressure test furnace from different angles, in which the protective cover is omitted;

[0010] Figure 4 is Figure 1 is a sectional view of the internal pressure test furnace shown in

[0011] Figure 5 and Figure 6 are respectively Figure 4 are enlarged views of the internal pressure test furnace shown in

[0012] Figure 7 and Figure 8 are respectively Figure 4 are sectional views of the internal pressure test furnace from different angles shown in

[0013] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the understanding of the reader.

[0014] 10, furnace body; 101, furnace cavity; 102, top wall; 103, bottom wall; 104, circumferential side wall; 105, furnace door;

[0015] 120, heating electrode; 121, top heat dissipation member; 122, side heat dissipation member; 123, bottom heat dissipation member;

[0016] 13, rotating shaft; 131, rotating disc; 132, sealing member; 133, rotating driving part; 134, semicircular toothed disc;

[0017] 141, pressure connector; 142, pressure supply pipeline; 1420, connecting member; 143, vacuum extraction pipeline; 1430, connecting pipe; 1431, through hole;

[0018] 15, protective member; 151, groove;

[0019] 16, working panel; 161, sliding rail;

[0020] 17, measurement sensor; 171, support panel; 172, displacement member;

[0021] 18, measurement window;

[0022] 19, joint;

[0023] 21, first temperature measuring unit; 22, second temperature measuring unit; 23, movement driving unit;

[0024] 31, furnace door locking cylinder;

[0025] 32, furnace door opening cylinder;

[0026] 41, mechanical pump; 42, molecular pump;

[0027] 51, protective cover; 511, through hole;

[0028] 200, test sample; 210, closed joint; 2101, protruding part. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are one embodiment of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the common meanings understood by those skilled in the art in the field of the present application.

[0031] In the description of the embodiments of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0032] The embodiments of the present application provide an internal pressure test furnace. Referring to Figures 1 to 5 The internal pressure test furnace of the embodiments of the present application comprises a furnace body 10, a rotating shaft 13, and a pressure medium providing unit. The furnace body 10 comprises a top wall 102, a bottom wall 103, and a circumferential side wall 104 connecting the top wall 102 and the bottom wall 103, and the top wall 102, the bottom wall 103, and the circumferential side wall 104 jointly define a sealed furnace cavity 101. The rotating shaft 13 extends downward from the bottom wall 103 of the furnace body 10, and is used to drive the furnace body 10 to rotate.

[0033] The pressure medium providing part comprises a pressure supply pipeline 142 and a pressure joint 141 connected with the pressure supply pipeline 142, the pressure supply pipeline 142 extends upwardly inside the rotating shaft 13 to the furnace cavity 101, and the rotating shaft 13 can rotate relative to the pressure supply pipeline 142, and the pressure joint 141 is used for sealingly connecting with the test sample to provide the pressure medium inside the test sample.

[0034] In some embodiments, the pressure joint 141 can have a threaded interface, one end of the test sample is installed with a closed joint, and the other end is installed with a joint having an air channel. The joint of the test sample having the air channel can have a threaded interface, which can be sealingly connected with the pressure joint 141 through the threaded interface.

[0035] The test sample can be, for example, a radioactive sample. In some embodiments, the test sample can be a cladding tube sample.

[0036] The circumferential side wall 104 of the furnace body 10 is provided with a measurement window 18, which is configured to face the test sample sealingly connected with the pressure joint 141 in the furnace cavity 101. That is, when the test sample is sealingly connected with the pressure joint 141, the measurement window 18 faces the test sample.

[0037] The internal pressure test furnace further comprises a measurement sensor 17 arranged on the circumferential side wall 104 of the furnace body 10 and arranged to face the measurement window 18, for measuring the outer shape data of the test sample in the furnace cavity 101.

[0038] In order to utilize the measurement sensor 17 to perform real-time measurement on the test sample in the furnace cavity 101 during the internal pressure test, the measurement window 18 is arranged on the side wall of the furnace body 10, so that the measurement sensor 17 can perform real-time measurement on the test sample in the furnace cavity 101 through the measurement window 18. However, since the measurement window 18 is arranged on the side wall of the furnace body 10 in the present embodiment, there is a significant temperature difference in the circumferential direction of the furnace cavity 101. By arranging the rotating shaft 13, the furnace body 10 can rotate relative to the pressure medium providing part and the test sample, which is beneficial to ensuring the uniformity of the temperature of the test sample in the circumferential direction during the high-temperature internal pressure test, so as to prevent the accuracy of the measurement from being affected by the local temperature difference of the test sample.

[0039] Further, since the internal pressure test furnace of the present embodiment can perform real-time measurement on the test sample in the furnace cavity 101 through the measurement window 18, the real state of the test sample under different temperatures, different pressures and different times can be measured. At the same time, since the measurement sensor 17 is arranged on the circumferential side wall 104 of the furnace body 10, it can rotate with the furnace body 10 around the test sample, so that the measurement sensor 17 can measure the size of the test sample in different circumferential directions, realize the circumferential scanning of the test sample, and improve the authenticity and reliability of the measurement data.

[0040] Therefore, the internal pressure test furnace can realize real-time, accurate and rapid measurement of the test sample in the furnace cavity 101 during the internal pressure test.

[0041] The internal pressure test furnace can further include a rotating driving part 133 for driving the rotating shaft 13 to rotate. The rotating driving part 133 can be a servo motor. In some embodiments, the servo motor can be used to control the furnace body 10 to rotate forward and backward by 180°, so as to perform circumferential scanning on the test sample in the furnace cavity 101.

[0042] Referring to Figure 2 , the internal pressure test furnace further includes a rotating disc 131 connected to the bottom of the rotating shaft 13. The rotating disc 131 and the rotating shaft 13 can be an integral piece. The rotating disc 131 is connected to a semicircular toothed disc 134, and the output shaft of the rotating driving part 133 is fixed with a driving gear, so as to drive the rotating disc 131, the rotating shaft 13 and the furnace body 10 to rotate together through the meshing of the semicircular toothed disc 134 and the driving gear.

[0043] The internal pressure test furnace can further include a working panel 16. The rotating disc 131 is rotatably arranged on the working panel 16. The rotating driving part 133 can be arranged on the working panel 16. Specifically, referring to Figure 4 , the working panel 16 is provided with a sliding rail 161, and the rotating disc 131 is provided with a sliding groove. Therefore, when the rotating driving part 133 drives the rotating disc 131 to rotate, the rotating disc 131 is rotatably arranged on the working panel 16 through the sliding cooperation of the sliding rail 161 and the sliding groove.

[0044] The internal pressure test furnace can further include a protective cover 51 covering the rotating disc 131. The circumferential side wall of the protective cover 51 can be provided with a through hole 511, so as to facilitate observation of the rotation of the rotating disc 131, the semicircular toothed disc 134 and the like.

[0045] In some embodiments, the measuring window 18 is made of transparent glass.

[0046] In some embodiments, the circumferential side wall 104 of the furnace body 10 is provided with two opposite measuring windows 18, and the measuring sensor 17 includes a transmitter for emitting laser and a receiver for receiving laser, and the transmitter and the receiver are respectively arranged to face one measuring window 18.

[0047] In some embodiments, the measuring sensor 17 can be a laser ranging sensor. The transmitter and the receiver are respectively arranged to face one measuring window 18, so as to measure the diameters of different heights of the test sample by laser. The measurement principle of the laser ranging sensor is well known to those skilled in the art, and will not be described here.

[0048] The internal pressure test furnace further comprises two support panels 171 and two displacement members 172. The two support panels 171 are oppositely arranged on the circumferential sidewall 104 of the furnace body 10. The support panels 171 can be located directly below the measurement window 18. Each displacement member 172 is arranged on one support panel 171. The transmitter and the receiver are arranged on the two displacement members 172, respectively, so as to be driven by the displacement members 172 to move in the horizontal direction.

[0049] The displacement members 172 are configured to be operable to drive the transmitter or the receiver to move in the horizontal direction in the front, back, left and right directions, so as to manually adjust the alignment of the transmitter or the receiver with the test sample. Specifically, the displacement members 172 can have two manual adjustment devices to achieve the purpose of adjusting the front, back, left and right positions of the measurement sensor 17.

[0050] The top wall 102, the bottom wall 103 and the circumferential sidewall 104 are internally formed with cooling cavities for the flow of cooling medium. That is, the furnace walls of the furnace body 10 adopt a hollow structure, and the interior is water-cooled by using cooling medium.

[0051] In some embodiments, the furnace body 10 can be a vertically extending cylinder. The furnace body 10 can comprise a shell and a furnace door 105 hinged to the fixed shell along a vertical axis. The furnace door 105 can comprise a door top wall, a door sidewall and a door bottom wall, and the shell can comprise a shell top wall, a shell sidewall and a shell bottom wall, wherein the door top wall and the shell top wall jointly form the top wall 102, and the door top wall is smaller than the shell top wall. The door sidewall and the shell sidewall jointly form the circumferential sidewall 104, and the door bottom wall and the shell bottom wall jointly form the bottom wall 103.

[0052] The shell and the furnace door 105 can both adopt a hollow design, and are respectively provided with water cooling interfaces. The two measurement windows 18 can be arranged on the shell sidewall of the shell and the door sidewall of the furnace door 105.

[0053] In such embodiments, the furnace body 10 is configured in a horizontally openable and closable form, and the furnace door 105 is sealed with the shell after being closed, so as to jointly form a furnace cavity 101 for sealing the pressure connector 141 and the test sample inside. The circumferential sidewall 104 of the furnace body 10 is further provided with a plurality of furnace door locking cylinders 31 for sealing the furnace door 105 with the shell. The top wall 102 of the furnace body 10 is further provided with a furnace door opening cylinder 32 for opening the furnace door 105.

[0054] In some embodiments, the pressure joint 141 is arranged upwardly, and when the test sample is sealingly connected with the pressure joint 141, the test sample extends substantially vertically. It is easily understood that the pressure joint 141 can support the test sample. The measurement sensor 17 can measure the profile data of the test sample at different heights in the furnace cavity 101 by area scanning. Thus, the internal pressure test furnace according to the embodiments of the present application can further realize full-size profile measurement of the test sample at any position in the axial and circumferential directions, and further improve the authenticity and accuracy of the measurement data.

[0055] In some embodiments, the lower edge of the measurement window 18 is located above or substantially flush with the pressure joint 141, and the upper edge of the measurement window 18 is located above or at least flush with the upper end of the test sample, so that the measurement sensor 17 can measure the profile data of the test sample at any height position.

[0056] In some embodiments, the internal pressure test furnace further comprises a heating portion for heating the furnace cavity 101. The inner sides of the top wall 102, the bottom wall 103 and the circumferential side wall 104 are metal layers for reflecting heat to keep the furnace cavity 101 warm.

[0057] The heating portion can comprise a plurality of heating electrodes 120 and a top heat sink 121, a side heat sink 122 and a bottom heat sink 123.

[0058] The plurality of heating electrodes 120 extend into the furnace cavity 101 from the circumferential side wall 104 of the furnace body 10. The top heat sink 121, the side heat sink 122 and the bottom heat sink 123 are respectively in heat-conducting contact with one or more heating electrodes 120 to dissipate the heat generated by the heating electrodes 120 into the furnace cavity 101.

[0059] The top heat sink 121, the side heat sink 122 and the bottom heat sink 123 can be respectively mounted on the furnace body 10 by mounting brackets, so that there is a gap between the top heat sink 121, the side heat sink 122 and the bottom heat sink 123 and the metal layers of the furnace body 10, thereby avoiding direct heat transfer from the top heat sink 121, the side heat sink 122 and the bottom heat sink 123 to the top wall 102, the bottom wall 103 and the circumferential side wall 104 of the furnace body 10, which is conducive to improving the heat preservation effect and reducing heat loss.

[0060] The bottom heat sink 123 and the top heat sink 121 are oppositely arranged, and the side heat sink 122 connects the bottom heat sink 123 and the top heat sink 121. The top heat sink 121, the side heat sink 122 and the bottom heat sink 123 jointly form a heating cavity, and when the test sample is sealingly connected with the pressure joint 141, the test sample is located inside the heating cavity. Through the above arrangement, the test sample as a whole can be uniformly heated, thereby improving the accuracy of the measurement results.

[0061] Referring to Figure 7 The plurality of heating electrodes 120 can be located at different heights and different circumferential positions of the furnace cavity 101 to uniformly provide heat into the furnace cavity 101. Specifically, the plurality of heating electrodes 120 are located at different heights and different circumferential positions of the side heat dissipating member 122.

[0062] In some embodiments, the plurality of heating electrodes 120 includes a plurality of first heating electrode groups located at different circumferential positions of the side heat dissipating member 122, each of the first heating electrode groups including a plurality of first heating electrodes 120 located at different heights of the side heat dissipating member 122.

[0063] In some embodiments, each of the first heating electrode groups can include three first heating electrodes 120 located at different heights of the side heat dissipating member 122, the three first heating electrodes 120 corresponding to positions above the test sample, a middle portion of the test sample, and the pressure connector 141, respectively, to further achieve uniform heating of the test sample.

[0064] The internal pressure test furnace further includes at least one first temperature measuring portion 21 disposed at the circumferential sidewall 104 of the furnace body 10, each of the first temperature measuring portions 21 configured to be movable in the furnace cavity 101 along a radial direction to a temperature measuring position in contact with the test sample and an initial position away from the test sample.

[0065] Since the first temperature measuring portion 21 is movable to the temperature measuring position in contact with the test sample, the surface temperature of the test sample can be accurately measured by contact with the test sample.

[0066] The internal pressure test furnace further includes at least one movement driving portion 23, each of the movement driving portions 23 configured to drive one of the first temperature measuring portions 21 to move in the furnace cavity 101 along the radial direction. The movement driving portion 23 can be a stepper motor. The movement driving portion 23 can be mounted at the circumferential sidewall 104 of the furnace body 10.

[0067] In some embodiments, the number of the first temperature measuring portions 21 is a plurality, the plurality of first temperature measuring portions 21 being vertically spaced apart and disposed at the circumferential sidewall 104 of the furnace body 10. Correspondingly, the number of the movement driving portions 23 is a plurality, the plurality of movement driving portions 23 being vertically spaced apart and disposed at the circumferential sidewall 104 of the furnace body 10, and each adjacent to one of the first temperature measuring portions 21.

[0068] Specifically, the number of the first temperature measuring portions 21 can be three. The three first temperature measuring portions 21 are respectively configured to measure a temperature above the test sample, a temperature of a middle portion of the test sample, and a temperature at the pressure connector 141 (i.e., a temperature of a bottom portion of the test sample). The three first temperature measuring portions 21 can be located at the same heights as the three first heating electrodes 120, respectively.

[0069] The internal pressure test furnace can further include a plurality of second temperature measuring portions 22 arranged at intervals in the vertical direction on the circumferential side wall 104 of the furnace body 10, for detecting the temperature at different heights in the furnace cavity 101. When the test sample is in sealing connection with the pressure connector 141, the plurality of second temperature measuring portions 22 are spaced apart from the test sample.

[0070] When measuring the temperature, the first temperature measuring portion 21 can be moved into contact with the test sample 200, so that the measured temperature of the test sample is more accurate. Since the furnace body 10 rotates relative to the test sample in the embodiment of the application, in order to avoid the first temperature measuring portion 21 scratching the test sample or affecting the performance of the test sample during the rotation of the furnace body 10, the first temperature measuring portion 21 needs to move away from the test sample after measuring the temperature of the test sample. Therefore, in the rotation test, only the second temperature measuring portion 22 can be used to measure the temperature of the test sample. Since the second temperature measuring portion 22 does not contact the test sample, the temperature measured by the second temperature measuring portion 22 is not accurate enough. The embodiment of the application can accurately obtain the temperature of the test sample by using the first temperature measuring portion 21 to contact and measure the temperature of the test sample, and then calibrate the temperature measured by the second temperature measuring portion 22 by adjusting the temperature of the second temperature measuring portion 22, so that the temperature read by the second temperature measuring portion 22 is the same as that of the first temperature measuring portion 21 (i.e., the temperature measured by the second temperature measuring portion 22 is calibrated), and then in the subsequent test, the temperature close to that of the test sample can be obtained by the second temperature measuring portion 22, and the measurement accuracy is improved.

[0071] The number of second temperature measuring portions 22 can be the same as that of first temperature measuring portions 21. Each second temperature measuring portion 22 can be located at the same height as a first temperature measuring portion 21, so that the temperature of the corresponding second temperature measuring portion 22 is calibrated by using the first temperature measuring portion 21 at the same height.

[0072] In some embodiments, the internal pressure test furnace further includes a vacuum extraction pipeline 143 extending upward from the radially inner side of the rotating shaft 13 to the furnace cavity 101, wherein the rotating shaft 13 can rotate relative to the vacuum extraction pipeline 143. The pipe section of the vacuum extraction pipeline 143 inside the furnace cavity 101 is provided with a plurality of through holes 1431 for vacuum extraction of the furnace cavity 101 through the plurality of through holes 1431.

[0073] The pressure supply pipeline 142 is located radially inward of the vacuum extraction pipeline 143. The embodiment of the application sets the vacuum extraction pipeline 143 between the pressure supply pipeline 142 and the rotating shaft 13, which can reasonably utilize the space and protect the pressure supply pipeline 142 by using the vacuum extraction pipeline 143. Since the vacuum extraction pipeline 143 is relatively stationary, the rotation of the furnace body 10 and the rotating shaft 13 will not adversely affect the sealing of the vacuum extraction pipeline 143.

[0074] In some embodiments, referring to Figure 6The inner pressure test furnace further comprises a sealing member 132 connected to the bottom surface of the rotating disc 131 and located radially outward of the vacuum extraction pipeline 143, and used to realize sealing between the vacuum extraction pipeline 143.

[0075] The sealing member 132 can be a magnetic fluid sealing member 132. Specifically, the vacuum extraction pipeline 143 passes through the middle through hole 1431 of the magnetic fluid sealing member 132, and two sealing rings are arranged in the middle through hole 1431 of the magnetic fluid sealing member 132, so that the vacuum extraction pipeline 143 can be sealed with the sealing rings after passing through, thereby ensuring that the vacuum degree in the furnace cavity 101 and the high-temperature airflow in the furnace cavity 101 cannot flow out.

[0076] Referring to Figure 5 and Figure 6 , the vacuum extraction pipeline 143 comprises a pipe joint 1430 located at the top, the pressure joint 141 is connected to the pipe joint 1430, and a plurality of through holes 1431 are arranged on the radial pipe wall of the pipe joint 1430. Referring to Figure 6 , the number of through holes 1431 can be multiple, and the multiple through holes 1431 are distributed equidistantly on the pipe joint 1430. For example, the number of through holes 1431 can be 4, 7, 12, 20, etc.

[0077] The diameter of the pipe joint 1430 is smaller than the diameters of the other vacuum extraction pipelines 143. The step surface is formed between the pipe joint 1430 and the other vacuum extraction pipelines 143, and the through holes 1431 for vacuum extraction are also formed on the step surface.

[0078] The pressure medium supply part can further comprise a connecting piece 1420 connected between the pressure joint 141 and the pressure supply pipeline 142. The connecting piece 1420 is a metal piece, and the connecting piece 1420 has an air passage inside and is in communication with the pressure supply pipeline 142. The connecting piece 1420 is arranged inside the pipe joint 1430 and forms an annular passage with the pipe joint 1430.

[0079] In some embodiments, the inner pressure test furnace further comprises a vacuum extraction part for extracting vacuum from the furnace cavity 101. Thus, before the inner pressure test of the test sample is performed, the vacuum extraction part can be used to extract vacuum from the furnace cavity 101 to perform the inner pressure test under vacuum conditions.

[0080] The vacuum extraction part can be a mechanical pump 41 and a molecular pump 42, which are in communication with the vacuum extraction pipeline 143 and used to extract vacuum from the furnace cavity 101 through the vacuum extraction pipeline 143. Through the combination of the molecular pump 42 and the mechanical pump 41, the pressure in the furnace body 10 can be extracted to 10 -4 pa at most.

[0081] The pressure supply pipeline 142 extends outward from the vacuum extraction pipeline 143 to be in communication with the high-pressure medium source through the pipeline to provide high-pressure medium from the high-pressure medium source.

[0082] In some embodiments, the high-pressure medium source is a high-pressure argon source. In some embodiments, the pressure supply pipeline 142 can be in communication with the high-pressure argon source and the vacuum pump (for example, through a three-way valve) after the vacuum pipeline 143, so that the vacuum pump can be controlled to vacuumize the test sample before the high-pressure argon source is controlled to supply argon to the test sample; the vacuumizing operation and the argon supplying operation can be repeated multiple times to remove air in the test sample. Then, the high-pressure argon source is controlled to supply the pressure medium to the test sample to perform the internal pressure test.

[0083] The top wall 102 and / or the circumferential side wall 104 of the furnace body 10 is provided with a vacuum breaking joint 19, which is used to break the vacuum to open the furnace door 105 after the test is completed.

[0084] Referring to Figure 7 and Figure 8 In some embodiments, the internal pressure test furnace further comprises a protective piece 15 arranged in the furnace cavity 101 to prevent the splashing of the part of the test sample 200 after the explosion. Specifically, the protective piece 15 is used to limit the explosion direction of the sample. The sample may explode when it fails, and the protective piece 15 is used to prevent the splashing of the part of the explosion to the heating part.

[0085] In some embodiments, the surface of the protective piece 15 facing the test sample is concave and forms a vertically extending groove 151, and when the test sample 200 is in sealing connection with the pressure joint 141, the top of the test sample 200 is located in the groove 151. Since the top of the test sample 200 is located in the groove 151, when the test sample 200 explodes, the top cannot continue to move upward and can only fall downward due to the limitation of the groove 151, so that the energy generated by the explosion is absorbed by the protective piece 15, effectively protecting the integrity of the top heat dissipation piece 121 and the side heat dissipation piece 122 from being damaged.

[0086] The protective piece 15 does not contact the test sample 200. In some embodiments, the closed joint 210 at the upper end of the test sample 200 has a protruding part 2101, and the part above the protruding part 2101 can extend into the groove 151, and the protruding part 2101 is located below the groove 151. The size of the protruding part 2101 is greater than the size of the groove 151. When the test sample 200 explodes, the protruding part 2101 of the closed joint 210 flying up to hit the protective piece 15 will fall down and will not splash.

[0087] The protective piece 15 can be connected with the circumferential side wall 104. The number of protective pieces 15 can be multiple, and the grooves 151 of these protective pieces 15 are arranged coaxially. In Figure 8 the illustrated embodiment, the number of protective pieces 15 is two.

[0088] In other embodiments, the shield 15 can also be connected to the top wall 102.

[0089] The embodiments of the present application further provide a test method of the internal pressure test furnace. The internal pressure test furnace is the internal pressure test furnace according to the embodiments of the present application. The test method comprises steps S1 to S6.

[0090] In step S1, the test sample 200 is sealingly connected to the pressure connector 141 of the internal pressure test furnace.

[0091] In step S2, the furnace cavity 101 is closed, heated and vacuumized, and then the pressure medium is filled into the test sample 200.

[0092] In step S3, the first temperature measuring part 21 is driven to move to contact the test sample 200, and the first temperature of the test sample 200 is collected.

[0093] In step S4, the temperature of the second temperature measuring part 22 is adjusted according to the temperature detected by the first temperature measuring part 21.

[0094] In step S5, the first temperature measuring part 21 is driven to move away from the test sample 200, and the power of the plurality of heating electrodes 120 is adjusted according to the temperature of the second temperature measuring part 22.

[0095] In step S6, the furnace body 10 is rotated, and the profile data of the test sample 200 in the furnace cavity 101 is measured by the measuring sensor 17.

[0096] In steps S3 to S5, the temperature measured by the first temperature measuring part 21 is t1, and the temperature measured by the second temperature measuring part 22 is t2 (which can not be equal to t1). The temperature t2 measured by the second temperature measuring part 22 is adjusted to t1 (for example, by compensating a value or by a formula calculation, so that the temperature t2 measured by the second temperature measuring part 22 becomes t1). Then, the first temperature measuring part 21 is driven to move away from the test sample 200, and only the temperature measured by the second temperature measuring part 22 is used as the temperature of the test sample 200. The power of the plurality of heating electrodes 120 is adjusted according to the temperature measured by the second temperature measuring part 22, so that the temperature measured by the second temperature measuring part 22 reaches the test temperature.

[0097] When measuring the temperature, the first temperature measuring part 21 can move to contact the test sample 200, so that the measured temperature of the test sample is more accurate. Since the furnace body 10 in the embodiment of the application rotates relative to the test sample 200, in order to avoid that the first temperature measuring part 21 scratches the test sample or affects the performance of the test sample during the rotation of the furnace body 10, the first temperature measuring part 21 needs to move away from the test sample after measuring the temperature of the test sample. Therefore, in the rotation test, only the second temperature measuring part 22 can be used to measure the temperature of the test sample 200. Since the second temperature measuring part 22 does not contact the test sample 200, the temperature of the test sample measured by the second temperature measuring part 22 is not accurate enough. The embodiment of the application can accurately obtain the temperature of the test sample 200 by using the first temperature measuring part 21 to contact and measure the temperature of the test sample 200, and then adjust the temperature of the second temperature measuring part 22 so that the temperature read by the second temperature measuring part 22 is the same as that of the first temperature measuring part 21, and then in the subsequent test, the temperature of the test sample 200 can be obtained by the second temperature measuring part 22, which is close to the actual temperature of the test sample 200, and the accuracy of the measurement is improved.

[0098] In some embodiments, before step S2, the test sample 200 can be vacuumed, and then the test sample 200 is supplied with argon gas; the vacuuming operation and the argon gas supplying operation are repeated multiple times to remove the air in the test sample 200. Then the high-pressure argon gas source is controlled to supply pressure medium to the test sample 200 to perform the internal pressure test.

[0099] In some embodiments, in step S6, the rotation driving part 133 can be used to drive the rotating disc 131 to rotate by a first angle, and then the measuring sensor 17 collects the profile data of the test sample 200. Then, the rotation driving part 133 is used to drive the rotating disc 131 to rotate by the first angle again, and then the measuring sensor 17 collects the profile data of the test sample 200. In this way, the profile data of the test sample 200 in the whole circumferential direction can be measured.

[0100] For the embodiments of the application, it should also be noted that the embodiments of the application and the features in the embodiments can be combined with each other to obtain new embodiments without conflict.

[0101] The above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. An internal pressure test furnace characterized by comprising: The internal pressure test furnace comprises: a furnace body, which comprises a top wall, a bottom wall and a circumferential side wall connecting the top wall and the bottom wall, and the top wall, the bottom wall and the circumferential side wall jointly define a sealed furnace cavity; a rotating shaft extending downward from the bottom wall of the furnace body for driving the furnace body to rotate; and a pressure medium supply part comprising a pressure supply pipeline and a pressure joint connected with the pressure supply pipeline, the pressure supply pipeline extending upward to the furnace cavity through the inside of the rotating shaft, and the rotating shaft can rotate relative to the pressure supply pipeline, and the pressure joint is used for sealingly connecting with a test sample to supply pressure medium into the inside of the test sample. The circumferential side wall of the furnace body is provided with a measurement window, and the measurement window is configured to face the test sample sealingly connected with the pressure joint in the furnace cavity. The internal pressure test furnace further comprises a measurement sensor arranged on the circumferential side wall of the furnace body and facing the measurement window for measuring the outer shape contour data of the test sample in the furnace cavity. The circumferential side wall of the furnace body is provided with two opposite measurement windows, 2. The internal pressure test furnace according to claim 1, characterized by The measurement sensor comprises a transmitter for emitting laser and a receiver for receiving laser, and the transmitter and the receiver are respectively arranged to face one of the measurement windows. Further comprising:

3. The internal pressure test furnace according to claim 2, characterized by two support panels oppositely arranged on the circumferential side wall of the furnace body; and two displacement members, each of which is arranged on one of the support panels, wherein the transmitter and the receiver are respectively arranged on the two displacement members to be driven by the displacement members to move in the horizontal direction. Further comprising: a rotating drive part for driving the rotating shaft to rotate.

4. The internal pressure test oven of claim 1, wherein Further comprising: a vacuum pipeline extending upward to the furnace cavity from the radially inner side of the rotating shaft, wherein the rotating shaft can rotate relative to the vacuum pipeline, 5. The internal pressure test oven of claim 1, wherein the pipe section of the vacuum pipeline located inside the furnace cavity is provided with a plurality of through holes for vacuumizing the furnace cavity through the plurality of through holes. The pressure supply pipeline is located radially inside the vacuum pipeline. The vacuum pipeline comprises a pipe joint located at the top, 6. The internal pressure test oven of claim 5, wherein the pressure joint is connected with the pipe joint, and the plurality of through holes are arranged on the radial pipe wall of the pipe joint.

7. The internal pressure test furnace according to claim 6, characterized by Further comprising: a rotating disc connected with the bottom of the rotating shaft; 8. The internal pressure test oven of claim 6, wherein, a working panel, and the rotating disc is rotatably arranged on the working panel; and a sealing member connected with the bottom surface of the rotating disc and located radially outside the vacuum pipeline for sealing between the vacuum pipeline. The top wall, the bottom wall and the inner side of the circumferential side wall respectively form a cooling cavity for cooling medium to flow; The internal pressure test furnace further comprises a heating part for heating the furnace cavity; The inner side of the top wall, the bottom wall and the circumferential side wall is a metal layer for reflecting heat.

9. The internal pressure test oven of claim 1, wherein, The heating part comprises: a plurality of heating electrodes extending into the furnace cavity from the circumferential side wall of the furnace body; a top heat dissipation member, a side heat dissipation member and a bottom heat dissipation member respectively in heat conduction contact with one or more of the heating electrodes to dissipate heat generated by the heating electrodes into the furnace cavity, 10. The internal pressure test oven of claim 9, wherein, ​ ​ ​ The top heat dissipation member, the side heat dissipation member and the bottom heat dissipation member are spaced apart from the metal layer of the furnace body, The top heat dissipation member, the side heat dissipation member and the bottom heat dissipation member jointly form a heating cavity, and the test sample is located inside the heating cavity when the test sample is sealingly connected with the pressure connector.

11. The internal pressure test oven of claim 1, wherein, The pressure connector is arranged upwardly, and the test sample extends substantially vertically when the test sample is sealingly connected with the pressure connector, The internal pressure test furnace further comprises: At least one first temperature measuring part is arranged on the circumferential side wall of the furnace body, and each first temperature measuring part is configured to be able to move radially in the furnace cavity to a temperature measuring position in contact with the test sample and an initial position away from the test sample.

12. The internal pressure test oven of claim 11, wherein, The number of first temperature measuring parts is multiple, and multiple first temperature measuring parts are arranged vertically and spaced apart on the circumferential side wall of the furnace body.

13. The internal pressure test oven of claim 11, wherein, Further comprising: At least one moving drive part is arranged on the circumferential side wall of the furnace body, and each moving drive part is used to drive one first temperature measuring part to move radially in the furnace cavity.

14. The internal pressure test oven of claim 11, wherein, Further comprising: Multiple second temperature measuring parts are arranged vertically and spaced apart on the circumferential side wall of the furnace body, and are used to detect the temperature at different heights in the furnace cavity, When the test sample is sealingly connected with the pressure connector, the multiple second temperature measuring parts are spaced apart from the test sample.

15. The internal pressure test oven of claim 1, wherein, Further comprising: A protective member is arranged in the furnace cavity, and is used to prevent the splashing of the burst part after the test sample bursts.

16. The internal pressure test oven of claim 15, wherein, The surface of the protective member facing the test sample is recessed inwardly to form a vertically extending groove, When the test sample is sealingly connected with the pressure connector, the top of the test sample is located in the groove.

17. A test method of an internal pressure test furnace according to claim 14, wherein The test method comprises: Sealingly connecting the test sample with the pressure connector of the internal pressure test furnace; Sealing the furnace cavity, and heating and vacuumizing the furnace cavity, and then charging the test sample with pressure medium; Driving the first temperature measuring part to move into contact with the test sample, and collecting the first temperature of the test sample; Adjusting the temperature of the second temperature measuring part according to the temperature detected by the first temperature measuring part; Driving the first temperature measuring part to move away from the test sample, and adjusting the power of the heating electrode according to the temperature of the second temperature measuring part; Rotating the furnace body, and measuring the contour data of the test sample in the furnace cavity by using a measuring sensor.

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