Double-channel pipe creep test device

Abstract

The utility model relates to a double-channel pipe creep test device, and belongs to the technical field of pressure test devices, the double-channel pipe creep test device comprises a vacuum furnace, the vacuum furnace is internally provided with at least two hearths for accommodating sample pieces, the hearths are provided with observation holes for observing the sample pieces, and the vacuum furnace is provided with an observation window for observing the sample pieces through the observation holes. Due to the fact that double-hearth or multi-hearth arrangement is adopted in the vacuum furnace, when a creep test of parallel samples is carried out, two sample pieces can be placed in the two hearths respectively, and compared with the mode that the samples are arranged in a single hearth in a circumferential mode, the area of window glass correspondingly needed by the hearths in the vacuum furnace is small; meanwhile, heating and temperature control systems of the hearths can be independent, the influence on temperature uniformity and temperature gradient in the hearths is small, the outer diameter deformation of the sample can be conveniently measured through an observation window by utilizing a measuring device, and the problem that the outer diameter deformation of the sample cannot be measured when the high-temperature vacuum furnace is used for carrying out a parallel sample creep test is solved.

Description

Technical Field

[0001] The present application relates to the technical field of pressure testing devices, and in particular to a dual-channel pipe creep testing device. Background Art

[0002] Seamless or seamed metal pipes and fittings are a large category of high-temperature pressure-bearing components in industries such as thermal power generation, nuclear power, petrochemicals, and aerospace. Creep deformation or fracture of metal materials at high temperatures is one of the main ways these components fail. When selecting and designing metal pipe materials, it is necessary to know their basic properties, especially high-temperature creep and durability properties, in order to more accurately estimate the remaining life of the components.

[0003] In the related technology, the patent with publication number CN104344999A discloses a high-temperature internal pressure fatigue testing machine, which can perform high-vacuum, high-pressure, high-temperature, high-precision and high-frequency pulse tests on alloy tubes, test the diameter change of the alloy tubes under the above conditions, and collect data for corresponding analysis. It has convenient temperature control, simple operation and high test accuracy.

[0004] However, the high-temperature vacuum furnace of the above-mentioned high-temperature internal pressure fatigue testing machine cannot carry out parallel sample tests, because when carrying out parallel sample tests, in order to ensure the consistency of the test environment, the samples are arranged in a circle in the furnace. If the outer diameter deformation of the parallel samples needs to be measured, the window glass area required on both sides of the furnace is larger, which will inevitably increase the temperature non-uniformity and temperature gradient inside the furnace.

[0005] Therefore, when conducting creep tests on parallel samples, high-temperature vacuum furnaces do not have glass windows, and only test temperature and pressure, but cannot measure the outer diameter deformation of the sample. Therefore, it is necessary to propose a pipe creep test device to overcome the problem that high-temperature vacuum furnaces cannot measure the outer diameter deformation of samples when conducting creep tests on parallel samples. Summary of the invention

[0006] The embodiment of the present application provides a dual-channel pipe creep testing device to solve the problem in the related art that the high-temperature vacuum furnace cannot measure the outer diameter deformation of the sample when performing creep tests on parallel samples.

[0007] The present application provides a dual-channel pipe creep test device, comprising:

[0008] A vacuum furnace, wherein at least two furnaces for accommodating samples are provided in the vacuum furnace, observation holes for observing the samples are provided on the furnaces, and observation windows for observing the samples through the observation holes are provided on the vacuum furnace;

[0009] A measuring device is arranged outside the vacuum furnace and is used to measure the outer dimensions of the sample through the observation window and the observation hole.

[0010] In some embodiments, the furnace includes a heating layer, a reflecting layer and a shielding layer which are arranged in sequence from the inside to the outside, the heating layer and the reflecting layer are used to reflect thermal radiation, and the shielding layer is used to block thermal radiation.

[0011] In some embodiments, the shielding layer includes an outer stainless steel seamless tube and an inner stainless steel seamless tube arranged inside the outer stainless steel seamless tube, and a vacuum layer for blocking heat radiation is formed between the outer stainless steel seamless tube and the inner stainless steel seamless tube.

[0012] In some embodiments, the reflective layer is a stainless steel liner tube disposed inside the inner stainless steel seamless tube, and the inner side of the stainless steel liner tube is a polished surface for reflecting thermal radiation.

[0013] In some embodiments, the heating layer includes an annular skeleton arranged on the inner side of the stainless steel liner tube and distributed at intervals along the axial direction, and heating plates distributed at intervals along the circumferential direction are arranged on the inner side of the annular skeleton. The heating plates are in multiple groups and distributed in a staggered manner.

[0014] In some embodiments, a temperature compensation sheet is disposed on the inner side of the stainless steel liner tube around the observation hole.

[0015] In some embodiments, the furnace chambers in the vacuum furnace are arranged in parallel or in a straight line, and a heat insulation layer for blocking heat radiation is provided between two adjacent furnace chambers.

[0016] In some embodiments, the sample includes a tube sample and sealing heads arranged at both ends of the tube sample, and each furnace is provided with a pressure injection pipe connected to the tube sample, and each pressure injection pipe is connected to a pressure unit respectively.

[0017] In some embodiments, the vacuum furnace further includes a furnace cover and a thermocouple disposed on the furnace cover, and the dual-channel pipe creep testing device further includes a sliding platform for respectively driving the furnace cover and the measuring device to move axially along the vacuum furnace.

[0018] In some embodiments, the dual-channel pipe creep testing device further includes a vacuum unit for evacuating a furnace chamber in the vacuum furnace, and a safety valve connected to the vacuum furnace.

[0019] The beneficial effects of the technical solution provided by this application include:

[0020] An embodiment of the present application provides a dual-channel pipe creep testing device, wherein at least two furnace chambers for accommodating samples are provided in a vacuum furnace, observation holes for observing the samples are provided on the furnace chambers, and observation windows for observing the samples through the observation holes are provided on the vacuum furnace; a measuring device is arranged outside the vacuum furnace and can measure the external dimensions of the sample through the observation windows and the observation holes.

[0021] Since the vacuum furnace adopts a double furnace or multiple furnace settings, when conducting creep tests on parallel samples, two samples can be placed in two furnaces respectively. Compared with the samples being arranged in a circle in a single furnace, the window glass area required for each furnace in the vacuum furnace of the present application is small. At the same time, the heating and temperature control systems of each furnace can be independent of each other, which has little effect on the temperature uniformity and temperature gradient inside the furnace. It is convenient to use a measuring device to measure the outer diameter deformation of the sample through the observation window, thereby overcoming the problem that the high-temperature vacuum furnace cannot measure the outer diameter deformation of the sample when conducting creep tests on parallel samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A structural cross-sectional view of an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the structure of an embodiment of the present application;

[0025] Figure 3 It is a left view of the structure of the embodiment of the present application;

[0026] Figure 4 This is a structural schematic diagram of a furnace in an embodiment of the present application;

[0027] Figure 5 Schematic diagram of a pressurizing unit according to an embodiment of the present application.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Vacuum furnace; 2. Furnace; 3. Observation hole; 4. Observation window; 5. Measuring device; 6. Outer stainless steel seamless pipe; 7. Inner stainless steel seamless pipe; 8. Stainless steel lining pipe; 9. Ring skeleton; 10. Heating plate; 11. Temperature compensation plate; 12. Furnace cover; 13. Thermocouple; 14. Sliding platform; 15. Vacuum unit; 16. Safety valve;

[0030] 17. Argon gas cylinder; 18. Gas cylinder pressure reducing valve; 19. Inlet stop valve; 20. Gas booster pump; 21. Outlet pressure sensor; 22. Gas storage tank; 23. Electric proportional valve; 24. Pressurization stop valve; 25. Unloading valve; 26. Output pressure sensor; 27. Pressure gauge. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] The embodiment of the present application provides a dual-channel pipe creep testing device, which can solve the problem in the related art that the high-temperature vacuum furnace cannot measure the outer diameter deformation of the sample when performing creep tests on parallel samples.

[0033] See also Figures 1 to 5 As shown, the embodiment of the present application provides a dual-channel pipe creep test device, comprising:

[0034] A vacuum furnace 1, wherein at least two furnace chambers 2 for accommodating samples are provided in the vacuum furnace 1, observation holes 3 for observing the samples are provided on the furnace chambers 2, and observation windows 4 for observing the samples through the observation holes 3 are provided on the vacuum furnace 1;

[0035] The measuring device 5 is arranged outside the vacuum furnace 1 and is used to measure the external dimensions of the sample through the observation window 4 and the observation hole 3 .

[0036] The vacuum furnace 1 of the dual-channel pipe creep test device of the embodiment of the present application is provided with at least two furnace chambers 2 for accommodating samples. When conducting creep tests on parallel samples, a sample can be placed separately in each furnace chamber 2. Therefore, the volume requirement for a single furnace chamber 2 is small, and the required window glass area requirement for each furnace chamber 2 in the vacuum furnace 1 is small, which has little effect on the temperature uniformity and temperature gradient inside the furnace chamber 2, and it is convenient to use the measuring device 5 to measure the outer diameter deformation of the sample through the observation window 4.

[0037] Specifically, the vacuum furnace 1 can adopt a double furnace or multiple furnace settings, each furnace 2 is provided with an independent heating unit, and can also share a set of vacuum units 15 for evacuating vacuum, so as to assess the creep of samples at different temperatures; at the same time, when a sample in one furnace 2 fails, the sample in another furnace 2 can continue to be tested, which is more advantageous than a single furnace setting.

[0038] It should be noted that the measuring device 5 can be a light curtain micrometer, including a receiving end and an output end. The method of measuring the external dimensions of the sample can be found in the patent with publication number CN104344999A, entitled A High-temperature Internal Pressure Fatigue Testing Machine.

[0039] In some alternative embodiments: See Figures 1 to 5As shown, an embodiment of the present application provides a dual-channel pipe creep test device, wherein the furnace 2 of the dual-channel pipe creep test device includes a heating layer, a reflecting layer and a shielding layer arranged in sequence from the inside to the outside, wherein the heating layer and the reflecting layer are used to reflect thermal radiation, and the shielding layer is used to block thermal radiation.

[0040] The furnace 2 of the embodiment of the present application includes a heating layer, a reflecting layer and a shielding layer. The heating layer can generate thermal radiation, the reflecting layer can reflect thermal radiation, and the shielding layer can block thermal radiation. The heating layer, the reflecting layer and the shielding layer cooperate with each other to make the sample heated evenly and reduce the temperature non-uniformity and temperature gradient inside the furnace 2.

[0041] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep test device, the shielding layer of which includes an outer stainless steel seamless tube 6 and an inner stainless steel seamless tube 7 arranged on the inner side of the outer stainless steel seamless tube 6, and a vacuum layer for blocking heat radiation is formed between the outer stainless steel seamless tube 6 and the inner stainless steel seamless tube 7.

[0042] The shielding layer of the embodiment of the present application includes an outer stainless steel seamless tube 6 and an inner stainless steel seamless tube 7. The outer stainless steel seamless tube 6 and the inner stainless steel seamless tube 7 can be separated by a pad. The outer side of the outer stainless steel seamless tube 6 can also be fixed in the furnace body by a pad. Specifically, when the furnace 2 is evacuated, a vacuum layer will be formed between the outer stainless steel seamless tube 6 and the inner stainless steel seamless tube 7. There is no heat convection in a vacuum environment, thereby blocking heat radiation and reducing heat loss during the test.

[0043] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep test device, the reflective layer of which is a stainless steel liner tube 8 arranged on the inner side of an inner stainless steel seamless tube 7, and the inner side of the stainless steel liner tube 8 is a polished surface for reflecting thermal radiation.

[0044] The reflective layer of the embodiment of the present application is a stainless steel liner tube 8 arranged on the inner side of the inner stainless steel seamless tube 7. The inner side of the stainless steel liner tube 8 is a polished surface for reflecting thermal radiation. Specifically, the polished surface can be a mirror surface, which can reflect each other and radiate heat.

[0045] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep test device, the heating layer of the dual-channel pipe creep test device includes an annular skeleton 9 arranged on the inner side of a stainless steel liner tube 8 and distributed along the axial direction, and heating plates 10 distributed along the circumferential direction are arranged on the inner side of the annular skeleton 9, and the heating plates 10 are divided into multiple groups and distributed in a staggered manner.

[0046] The heating layer of the embodiment of the present application includes an annular skeleton 9 and a heating plate 10. Specifically, the annular skeleton 9 can be fixed on the inner side of the stainless steel liner tube 8. The heating plate 10 can use a molybdenum plate as a heating resistor. Three groups of heating plates 10 can be arranged to perform three-stage heating on the furnace 2 to make the sample heated evenly and reduce the temperature unevenness and temperature gradient inside the furnace 2. At the same time, the staggered distribution between two adjacent groups of heating plates 10 can avoid uneven heating at the transition position of the two groups of heating plates 10, which leads to increased temperature unevenness and temperature gradient.

[0047] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep test device, in which a temperature compensation sheet 11 located around the observation hole 3 is arranged inside the stainless steel liner pipe 8 of the dual-channel pipe creep test device.

[0048] The inner side of the stainless steel lined tube 8 in the embodiment of the present application is provided with a temperature compensation sheet 11 located around the observation hole 3. Specifically, the temperature compensation sheet 11 serves as a heating element and can perform heat compensation to make the heat distribution in the entire uniform temperature zone more uniform, thereby preventing the observation hole 3 from increasing the temperature unevenness and temperature gradient in the furnace 2.

[0049] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep test device, in which the furnaces 2 in the vacuum furnace 1 of the dual-channel pipe creep test device are arranged in parallel or in a straight line, and an insulation layer for blocking heat radiation is provided between two adjacent furnaces 2.

[0050] The furnaces 2 of the embodiment of the present application can be arranged horizontally with one another stacked up and down or arranged horizontally side by side. Each furnace 2 has an independent furnace cover 12 or the furnaces 2 share a furnace cover 12; an insulation layer for blocking heat radiation can be set between two adjacent furnaces 2. There is no heat convection in a vacuum environment, and heat radiation only occurs between surfaces facing each other. Only objects that can see each other can conduct radiation heat transfer; when two furnaces are in parallel, there is an insulation layer in the middle, and the influence of radiation heat on the two temperature zones is very small, so that each furnace 2 can be controlled at different temperatures.

[0051] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep test device, the sample of the dual-channel pipe creep test device includes a pipe sample and heads arranged at both ends of the pipe sample, each furnace 2 is provided with a pressure injection pipe connected to the pipe sample, and each pressure injection pipe is connected to a pressure unit respectively.

[0052] The sample of the embodiment of the present application includes a tube sample and a head arranged at both ends of the tube sample. The pressure injection pipe is arranged on the head on one side. The tube sample can be pressurized by liquid or gas. The pressure injection pipes connecting the tube samples are respectively connected to the pressure units. Different pressures can be applied to the tube samples, which is convenient for comparative testing.

[0053] Specifically, the pressure unit includes an argon gas cylinder 17, a gas cylinder pressure reducing valve 18, an air inlet stop valve 19, a gas booster pump 20 and an outlet pressure sensor 21 which are connected in sequence. The outlet pressure sensor 21 is connected to a gas storage tank 22 via a four-way joint. The remaining two ports of the four-way joint are connected in sequence to an electrical proportional valve 23, a pressurization stop valve 24, a unloading valve 25 and an output pressure sensor 26. The unloading valve 25 is connected to a pressure gauge 27. The gas passing through the output pressure sensor 26 is input into the tube sample through a pressure injection tube.

[0054] The vacuum furnace 1 adopts a double furnace design, which can test samples in two channels at the same time, and the pressure and temperature of the two channels can be independently controlled. When the test pressure is controlled independently by two channels, the gas booster pump 20 pressurizes the high-purity argon gas in the argon gas bottle 17 and stores it in the pressure storage tank 22;

[0055] The output pressure of the electrical proportional valve 23 is set, and the set pressure is compared with the feedback value of the output pressure sensor 26. Through the precise control of the electrical proportional valve 23 and the computer control system, the output pressure and the set pressure value can be infinitely close, thereby outputting the required test pressure.

[0056] Close the pressurization stop valve 24 to maintain the pressure. The two channels can control the pressure independently. The pressure maintenance test of two samples can be carried out at the same time, or the pressure maintenance test of one sample can be carried out separately.

[0057] A high-temperature vacuum furnace with a single furnace body and two furnace chambers is used. One furnace chamber 2 is used to install a sample, and the sample is installed in the center of the furnace chamber 2. The heating and temperature control systems of the two furnace chambers are independent of each other, and the two channels share a set of vacuum units 15.

[0058] Each furnace 2 is equipped with a movable measuring device 5, or two furnaces 2 share the measuring device 5, so as to realize long-term real-time measurement of the sample sizes of the two channels in different time periods.

[0059] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep test device, wherein the vacuum furnace 1 of the dual-channel pipe creep test device further includes a furnace cover 12 and a thermocouple 13 arranged on the furnace cover 12, and the dual-channel pipe creep test device further includes a sliding platform 14 for respectively driving the furnace cover 12 and the measuring device 5 to move axially along the vacuum furnace 1.

[0060] Three thermocouples 13 are installed on the front and rear furnace covers 12 of the embodiment of the present application, respectively, for controlling the furnace temperature and measuring the surface temperature of the sample. Specifically, the thermocouples 13 include temperature-controlling thermocouples and temperature-measuring thermocouples. Three temperature-controlling thermocouples are installed on the furnace cover 12 at the rear end, for controlling the heating temperature of the furnace 2. The furnace 2 uses three groups of heating plates 10 to achieve independent heating of the front, middle and rear sections. Each group of heating plates 10 is controlled separately, so three temperature-controlling thermocouples are installed on the furnace cover 12 at the rear end;

[0061] A temperature measuring thermocouple is installed on the furnace cover 12 at the front end to measure the surface temperature of the sample. Because the temperature needs to be measured at the front, middle and rear positions of the sample, three temperature measuring thermocouples are installed on the furnace cover 12 at the front end. The temperature measuring probes of the three temperature measuring thermocouples are tied to the front, middle and rear sections of the sample to measure the surface temperature of the front, middle and rear sections of the sample respectively. At the same time, since the furnace cover 12 must be opened every time the sample is disassembled, the temperature measuring thermocouple is installed on the furnace cover 12 at the front end to facilitate the sample to be moved out of the furnace 2 together with the temperature measuring thermocouple. The above-mentioned temperature control thermocouple and temperature measuring thermocouple cooperate with each other to realize three controls and three measurements, independent measurement and control, and achieve precise control of the surface temperature of the sample.

[0062] The sliding platform 14 provided at the same time facilitates the movement of the furnace cover 12 to open or close, and also facilitates the movement of the measuring device 5 for measurement. Specifically, the sliding platform 14 can be an electric or pneumatic linear slide.

[0063] In some alternative embodiments: See Figures 1 to 5 As shown, an embodiment of the present application provides a dual-channel pipe creep testing device, which also includes a vacuum unit 15 for evacuating a furnace chamber 2 in a vacuum furnace 1, and a safety valve 16 connected to the vacuum furnace 1.

[0064] The vacuum furnace 1 of the embodiment of the present application adopts a single furnace body and double furnace design, one furnace 2 is equipped with one sample, and the sample is installed in the center of the furnace 2. The heating and temperature control systems of the double furnaces are independent of each other, and the double channels formed by the double furnaces share a set of vacuum units 15, which can quickly evacuate the vacuum furnace 1 to ensure that the samples are in the same vacuum environment during parallel tests.

[0065] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0066] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0067] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A dual-channel pipe creep test device, characterized in that: include: A vacuum furnace (1), wherein at least two furnace chambers (2) for accommodating samples are arranged in the vacuum furnace (1), observation holes (3) for observing the samples are arranged on the furnace chambers (2), and observation windows (4) for observing the samples through the observation holes (3) are arranged on the vacuum furnace (1); A measuring device (5), wherein the measuring device (5) is arranged outside the vacuum furnace (1), and the measuring device (5) is used to measure the external dimensions of the sample through the observation window (4) and the observation hole (3).

2. The dual-channel pipe creep testing device according to claim 1, characterized in that: The furnace (2) comprises a heating layer, a reflecting layer and a shielding layer which are arranged in sequence from the inside to the outside, the heating layer is used to heat the sample, the reflecting layer is used to reflect thermal radiation, and the shielding layer is used to block thermal radiation.

3. The dual-channel pipe creep testing device according to claim 2, characterized in that: The shielding layer comprises an outer stainless steel seamless tube (6) and an inner stainless steel seamless tube (7) arranged inside the outer stainless steel seamless tube (6), and a vacuum layer for blocking heat radiation is formed between the outer stainless steel seamless tube (6) and the inner stainless steel seamless tube (7).

4. The dual-channel pipe creep testing device according to claim 3, characterized in that: The reflective layer is a stainless steel liner tube (8) arranged on the inner side of the inner stainless steel seamless tube (7), and the inner side of the stainless steel liner tube (8) is a polished surface for reflecting heat radiation.

5. The dual-channel pipe creep testing device according to claim 4, characterized in that: The heating layer comprises an annular skeleton (9) arranged inside the stainless steel liner tube (8) and spaced apart in the axial direction, and heating plates (10) spaced apart in the circumferential direction are arranged inside the annular skeleton (9), and the heating plates (10) are in multiple groups and staggeredly distributed.

6. The dual-channel pipe creep testing device according to claim 5, characterized in that: The inner side of the stainless steel liner tube (8) is provided with a temperature compensation sheet (11) located around the observation hole (3).

7. The dual-channel pipe creep testing device according to claim 1, characterized in that: The furnace chambers (2) in the vacuum furnace (1) are arranged in parallel or in a straight line, and a heat insulation layer for blocking heat radiation is provided between two adjacent furnace chambers (2).

8. The dual-channel pipe creep testing device according to claim 1, characterized in that: The sample comprises a tube sample and sealing heads arranged at both ends of the tube sample. A pressure injection pipe connected to the tube sample is arranged in each furnace (2), and each pressure injection pipe is connected to a pressure unit respectively.

9. The dual-channel pipe creep testing device according to claim 1, characterized in that: The vacuum furnace (1) further comprises a furnace cover (12) and a thermocouple (13) arranged on the furnace cover (12); the dual-channel pipe creep test device further comprises a sliding platform (14) for respectively driving the furnace cover (12) and the measuring device (5) to move axially along the vacuum furnace (1).

10. The dual-channel pipe creep testing device according to claim 1, characterized in that: The dual-channel pipe creep test device also includes a vacuum unit (15) for evacuating a furnace chamber (2) in the vacuum furnace (1), and a safety valve (16) connected to the vacuum furnace (1).

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