Thermal cycler apparatus

Abstract

The application provides a thermal cycle experiment device, and relates to the field of experimental equipment. The thermal cycle experiment device comprises a heating furnace, an execution unit and a regulation unit. The heating furnace has a furnace cavity for accommodating a sample and an inlet and outlet connected with the furnace cavity. The execution unit comprises a sample disc, a connecting rod and a cover, the sample disc and the cover are connected with the connecting rod, the sample disc is used for carrying the sample, and the cover is used for opening or closing the inlet and outlet. The regulation unit is connected with the connecting rod and is used for driving the connecting rod to slide along the extension direction of the connecting rod, so that the sample disc enters or leaves the furnace cavity; and after the sample disc enters the furnace cavity, the cover closes the inlet and outlet. The thermal cycle experiment device does not need to realize the thermal cycle simulation of the sample by temperature rising and falling, improves the influence of the temperature change process on the experimental result, and is more flexible and reliable in temperature control.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of experimental equipment, in particular, to a thermal cycle experimental device. BACKGROUND

[0002] Thermal cycle experiment is a very common and important experiment type, which is an important basic experiment for studying the thermodynamic properties and fatigue properties of materials. The purpose is to expose potential material defects and manufacturing quality defects in products, eliminate early failure, and improve product reliability. In thermal cycle experiment, the sample needs to be repeatedly heated and cooled, and the cycle number of "heating-cooling" can reach tens of thousands. The current thermal cycle device includes constant temperature type and variable temperature type. The constant temperature type experimental device can heat the sample to a preset temperature. However, it cannot change the temperature according to the program, which leads to the need for experimenters to manually open and close the experimental device to achieve thermal cycle. The variable temperature type experimental device has a temperature control system. The device is provided with a cold source / heat source or a cold working medium / heat working medium. The discharge of the cold working medium / heat working medium is controlled by a solenoid valve. The host computer controls the opening / closing of the solenoid valve at a certain time interval, so that the cold working medium / heat working medium enters the cavity to achieve the purpose of heating or cooling. The constant temperature type experimental device needs experimenters to manually control the power on or off of the device to achieve thermal cycle.

[0003] The inventor found in the research that the constant temperature type device has the disadvantage that manual participation is required throughout the process, and the workload of experimenters is large and the efficiency is low. The variable temperature type device has the disadvantage that when the temperature changes, there is a clear heating / cooling process, the temperature changes slowly, and the stability, reliability and repeatability of the temperature control system are not good. SUMMARY

[0004] The present application provides a thermal cycle experimental device to improve the above problems.

[0005] The present application is as follows:

[0006] Based on the above purpose, the embodiment provides a thermal cycle experimental device, which comprises:

[0007] A heating furnace, the heating furnace has a furnace cavity for accommodating a sample and an inlet and outlet communicating with the furnace cavity;

[0008] An execution unit, the execution unit comprises a sample disc, a connecting rod and a cover, the sample disc and the cover are connected with the connecting rod, the sample disc is used for carrying a sample, and the cover is used for opening or closing the inlet and outlet;

[0009] and a regulating unit connected with the connecting rod for driving the connecting rod to slide along the extending direction of the connecting rod so as to make the sample disc enter or exit the furnace cavity; and after the sample disc enters the furnace cavity, the cover closes the inlet and outlet.

[0010] In an embodiment of the present application, the heating furnace is provided with an observation window for observing the sample in the furnace cavity.

[0011] In an embodiment of the present application, the cover is sleeved outside the connecting rod, and the cover is slidably connected with the connecting rod in the axial direction of the connecting rod; the cover is arranged at intervals with the sample disc in the axial direction of the connecting rod.

[0012] In an embodiment of the present application, the cover comprises a fixing body, a sealing body and a locking body, the sealing body is fixedly connected with the fixing body, and the sealing body and the fixing body are both sleeved outside the connecting rod and slidably connected with the connecting rod; the locking body is screwed outside the fixing body, and the locking body has a first position and a second position which are switched with each other, when the locking body is in the first position, the locking body abuts against the connecting rod to limit the relative sliding of the fixing body and the connecting rod; when the locking body is in the second position, the locking body has a spacing with the connecting rod to allow the fixing body to slide relative to the connecting rod.

[0013] In an embodiment of the present application, the sealing body is provided in a variable-diameter structure, and the cross-sectional area of the sealing body gradually increases from one end of the sealing body close to the sample disc to the other end.

[0014] In an embodiment of the present application, the regulating unit comprises a rack, a driver, a transmission mechanism and a connecting mechanism, the driver is arranged on the rack, the driver is connected with the connecting mechanism through the transmission mechanism, and the connecting mechanism is connected with the connecting rod; the driver is used for transmitting power to the connecting mechanism through the transmission mechanism to drive the connecting rod to move through the connecting mechanism.

[0015] In an embodiment of the present application, the driver is provided as a motor, the transmission mechanism comprises a lead screw and a sliding block, the lead screw is fixedly connected with the output shaft of the motor, the sliding block is screwed outside the lead screw, the sliding block is slidably connected with the rack, and the sliding block and the rack are relatively fixed in the circumferential direction of the lead screw; the connecting mechanism is connected with the sliding block.

[0016] In an embodiment of the present application, the connecting rod and the connecting mechanism are slidably connected in the axial direction of the connecting rod.

[0017] In one embodiment of the present application, the connecting mechanism comprises a connecting column and a locking screw, the connecting column is connected with the slider, the end of the connecting column is provided with a clamping groove with two opposite groove walls, and the connecting rod is clamped in the clamping groove; the locking screw is screwed on the connecting column, and the locking screw is used to make the two groove walls close to or away from each other, so that the two groove walls clamp or release the connecting rod.

[0018] In one embodiment of the present application, the execution unit further comprises a heat preservation cover connected with the connecting rod, the sample disc is located between the heat preservation cover and the cover, and the heat preservation cover is used to close the inlet and outlet when the sample disc leaves the furnace cavity.

[0019] The present application has the following beneficial effects:

[0020] In summary, the thermal cycle experiment device provided by the embodiment can use the heating furnace to heat the sample at a constant temperature, and can also adjust the temperature of the heating furnace according to the requirement, so as to realize heating at a set temperature. During the heating process, the sample can move relative to the heating furnace under the cooperation of the execution unit and the positioning unit, that is, the sample disc loaded with the sample can be driven by the positioning unit to leave or enter the heating furnace, and when entering the heating furnace, the sample is heated, and when leaving the heating furnace, the heating of the sample is stopped. Thus, the thermal cycle is realized. At the same time, during the thermal cycle process, the heating furnace does not need to be repeatedly started and stopped, compared with the thermal cycle realized by gradually increasing and decreasing the temperature in the prior art, the operation is more convenient and flexible, and the situation that the experimental result error is large due to that the sample is in a temperature slowly changing environment does not occur. The temperature control of the experiment device in the embodiment is more stable and reliable, the result error of repeated experiments is small, and the experimental result accuracy is high. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 The structural schematic diagram of the thermal cycle experiment device provided by the present application is shown in the figure;

[0023] Figure 2 The structural schematic diagram of the heating furnace provided by the present application is shown in the figure;

[0024] Figure 3 The structural schematic diagram of the execution unit provided by the present application is shown in the figure;

[0025] Figure 4 The application state switching schematic diagram of the thermal cycle experiment device provided in the present application is shown in the following figure:

[0026] Figure 5 The cooperation structure schematic diagram of the execution unit and the heating furnace provided in the present application is shown in the following figure:

[0027] Figure 6 The deformation structure schematic diagram of the execution unit provided in the present application is shown in the following figure.

[0028] Icon:

[0029] 001-sample; 100-heating furnace; 110-furnace cavity; 120-inlet and outlet; 130-observation window; 140-supporting rod; 200-execution unit; 210-sample disc; 211-groove; 212-guiding hole; 220-connecting rod; 230-capping; 231-fixing body; 232-sealing body; 233-locking body; 240-heat preservation cover; 250-connecting rod; 300-positioning unit; 310-rack; 320-driver; 330-transmission mechanism; 331-screw rod; 332-sliding block; 340-connecting mechanism; 341-connecting column; 342-locking screw; 343-clamping groove; 400-control unit. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0032] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0033] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0034] In the description of the embodiments of the present application, it should be noted that the indicated position or positional relationship is based on the position or positional relationship shown in the drawings, or the position or positional relationship commonly used when the product of the application is used, or the position or positional relationship commonly understood by those skilled in the art, or the position or positional relationship commonly used when the product of the application is used, only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated thermal cycle experiment device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present application, it should be noted that unless otherwise specified and limited, the terms "set", "install", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Embodiments

[0037] In this embodiment, the thermal cycle experiment device does not need to realize the thermal cycle simulation of the sample by heating and cooling, which improves the influence of the temperature change process on the experimental results and makes the temperature control more flexible and reliable.

[0038] In this embodiment, it should be noted that the application scenario of the thermal cycle experiment device is not limited, and can adapt to the research of the mechanical properties and fatigue properties of various materials, which is not specifically limited in this embodiment.

[0039] Please refer to Figure 1 , Figure 2 and Figure 5 , in this embodiment, the thermal cycle experiment device comprises a heating furnace 100, an execution unit 200 and a control unit. The heating furnace 100 has a furnace cavity 110 for accommodating a sample 001 and an inlet and outlet 120 communicating with the furnace cavity 110. The execution unit 200 comprises a sample disc 210, a connecting rod 220 and a cover 230, the sample disc 210 and the cover 230 are connected with the connecting rod 220, the sample disc 210 is used for carrying the sample 001, and the cover 230 is used for opening or closing the inlet and outlet 120. The control unit is connected with the connecting rod 220, used for driving the connecting rod 220 to slide along the extension direction of the connecting rod 220, so that the sample disc 210 enters or leaves the furnace cavity 110; and after the sample disc 210 enters the furnace cavity 110, the cover 230 closes the inlet and outlet 120.

[0040] The working principle of the thermal cycle experiment device provided in this embodiment is as follows:

[0041] The position of the execution unit 200 is first adjusted so that the sample disc 210 of the execution unit 200 is located outside the heating furnace 100, and then the sample 001 to be studied is placed on the sample disc 210; the positioning unit 300 is started to drive the execution unit 200 to move, and the sample disc 210 and the sample 001 move together into the heating furnace 100. By setting the start and stop time of the positioning unit 300, the movement mode thereof is controlled, so that the sample 001 can be moved out of the heating furnace 100 after being located in the heating furnace 100 for a set time, and then moved into the heating furnace 100 after being located outside the heating furnace 100 for a set time. When the sample 001 is located in the heating furnace 100, the sample 001 is heated, and when the sample 001 is located outside the heating furnace 100, the heating of the sample 001 is stopped, so that thermal cycling is achieved. Compared with the prior art which needs to adjust the temperature of the heating element to achieve thermal cycling by heating and cooling, the experimental device of the embodiment is more convenient and flexible, and has high reliability.

[0042] In the embodiment, the heating furnace 100 is in a square structure, the top of the heating furnace 100 is provided with an inlet and outlet 120, and the inlet and outlet 120 is a circular hole, and the inlet and outlet 120 communicates with the square furnace cavity 110 inside the heating furnace 100. An observation window 130 is arranged on the side, for example, the front side, of the heating furnace 100, and the observation window 130 can be made of a light-transmitting material resistant to high temperature, so that when the sample 001 is heated in the heating furnace 100, the state of the sample 001 in the heating furnace 100 can be observed through the observation window 130, which facilitates timely adjustment of the heating strategy or shutdown when an abnormal situation or other situation occurs during the experiment, thereby reducing the accident rate.

[0043] It should be understood that the observation window 130 can be made of high-temperature-resistant glass. For example, a through hole can be formed on the heating furnace 100, and the high-temperature-resistant glass is embedded in the through hole, and a heat preservation layer can be arranged around the high-temperature-resistant glass.

[0044] Please refer to Figure 5 In other embodiments, the heating furnace 100 is internally provided with a plurality of support rods 140, the plurality of support rods 140 are all cylindrical rods and are arranged in parallel and at intervals, and each support rod 140 is parallel to the axis of the inlet and outlet 120. For example, the number of support rods 140 is three, and the three support rods 140 are uniformly and interval arranged around the axis of the inlet and outlet 120.

[0045] Please refer to Figure 5 and Figure 6In this embodiment, the connecting rod 220 is a circular rod. The sample disc 210 is a circular disc, and the sample disc 210 is provided with a groove 211, and the test sample 001 can be accommodated in the groove 211. Further, the groove 211 is a variable-diameter groove with a circular cross section, specifically, the cross-sectional profile of the groove 211 is circular, and the cross-sectional diameter of the groove 211 gradually increases in the direction from the groove bottom wall to the groove opening. At the same time, the sample disc 210 is provided with three guide holes 212 penetrating the groove bottom wall of the groove 211, each guide hole 212 is a circular hole, and the end of the guide hole 212 away from the groove bottom wall of the groove 211 is provided with a conical port, which has the function of guiding the insertion of the support rod 140 into the guide hole 212. By setting the sample disc 210 as a circular disc and the groove 211 as a conical groove, the circular test sample 001 can be placed flat in the groove 211, thereby adapting to the placement of test samples 001 of different sizes. After the test sample 001 is positioned in the groove 211, the test sample 001 is arranged substantially horizontally, that is, parallel to the groove bottom wall of the groove 211, or perpendicular to the center line of the groove 211, and the position of the test sample 001 is stable and reliable. Moreover, the edge of the sample disc 210 is connected to the end of the connecting rod 220 through the connecting rod 250, which can be one or more, for example, the connecting rod 250 can be two, and the two connecting rods 250 are arranged in central symmetry, and the distance between the two connecting rods 250 is greater than the width of the groove opening of the groove 211, which is not easy to affect the placement of the test sample 001 into the groove 211. When the sample disc 210 is fixed to the connecting rod 220 through the connecting rod 250, the axis of the sample disc 210 is collinear with the axis of the connecting rod 220. During the process of the sample disc 210 entering and exiting the furnace cavity 110, the sample disc 210 always maintains the position coaxial with the furnace cavity 110, and the operation is stable and reliable.

[0046] Please combine Figure 3Optionally, the cover 230 comprises a fixing body 231, a sealing body 232 and a locking body 233. The sealing body 232 is fixedly connected with the fixing body 231. Both the sealing body 232 and the fixing body 231 are sleeved on the connecting rod 220 and slidably matched with the connecting rod 220. The locking body 233 can be a top screw. The locking body 233 is screwed on the outside of the fixing body 231. The locking body 233 has a first position and a second position which are switched with each other. When the locking body 233 is in the first position, the locking body 233 abuts against the connecting rod 220 to limit the relative sliding of the fixing body 231 and the connecting rod 220. When the locking body 233 is in the second position, the locking body 233 has a spacing with the connecting rod 220 to allow the fixing body 231 to slide relative to the connecting rod 220. Further, the sealing body 232 is provided in a variable-diameter structure. The cross-sectional area of the sealing body 232 gradually increases from one end of the sealing body 232 close to the sample disc 210 to the other end. For example, the sealing body 232 is a conical body. By providing the sealing body 232 in the variable-diameter structure, the small end of the sealing body 232 is close to the inlet and outlet 120. Thus, when the sealing body 232 needs to seal the inlet and outlet 120, the sealing body 232 can be easily inserted into the inlet and outlet 120 and pressed at the inlet and outlet 120, which has a wide range of adaptation.

[0047] Please refer to Figure 6 In other embodiments, the execution unit 200 further comprises a heat preservation cover 240 which can be a conical structure. The heat preservation cover 240 is connected with the connecting rod 220. The sample disc 210 is located between the heat preservation cover 240 and the cover 230. The heat preservation cover 240 is used to close the inlet and outlet 120 when the sample disc 210 leaves the furnace chamber 110, so as to ensure that the temperature in the heating furnace 100 is not easily lost and energy is saved. It should be understood that when the heat preservation cover 240 is connected below the sample disc 210, the heat preservation cover 240 is also provided with a relief hole so that the supporting rod 140 passes through the relief hole and then enters the guide hole 212.

[0048] Please refer to Figure 1 and Figure 4 In the present embodiment, optionally, the control unit comprises a rack 310, a driver 320, a transmission mechanism 330 and a connecting mechanism 340. The driver 320 is arranged on the rack 310. The driver 320 is connected with the connecting mechanism 340 through the transmission mechanism 330. The connecting mechanism 340 is connected with the connecting rod 220. The driver 320 is used to transmit power to the connecting mechanism 340 through the transmission mechanism 330, so as to drive the connecting rod 220 to move through the connecting mechanism 340.

[0049] Optionally, the driver 320 is set as a motor. The transmission mechanism 330 includes a screw rod 331 and a sliding block 332, the screw rod 331 is fixedly connected with an output shaft of the motor, the sliding block 332 is screwed on the outer surface of the screw rod 331, the sliding block 332 is slidably connected with the rack, and the sliding block 332 is fixedly connected with the rack in the circumferential direction of the screw rod 331. After the motor is started, the screw rod 331 rotates, and the sliding block 332 does not rotate with the screw rod 331, but reciprocally slides in the extension direction of the screw rod 331, so as to drive the connecting mechanism 340 connected with the sliding block 332 to move. The connecting mechanism 340 includes a connecting column 341 and a locking screw 342, the connecting column 341 is connected with the sliding block 332, the end of the connecting column 341 is provided with a clamping groove 343 having two opposite groove walls, and the connecting rod 220 is clamped in the clamping groove 343. The locking screw 342 is screwed on the connecting column 341, and the locking screw 342 is used to make the two groove walls close to or away from each other, so as to clamp or loosen the connecting rod 220. That is, the connecting rod 220 is connected with the connecting column 341, and when the locking screw 342 is screwed, the connecting rod 220 does not slide relative to the connecting column 341, and when the locking screw 342 is loosened, the connecting rod 220 is not clamped by the two groove walls, and the connecting rod 220 can slide relative to the connecting column 341, so as to adjust the position. When the connecting column 341 and the connecting rod 220 are installed, the connecting column 341 is vertically arranged with the connecting rod 220, and the connecting rod 220 is arranged in parallel with the screw rod 331.

[0050] Optionally, the thermal cycle experiment device further includes a control unit 400, which can be a plc, a single-chip microcomputer or an stm32.

[0051] In addition, the motor can be a servo motor, a brushless motor, a brushed motor, a disc motor, etc.

[0052] The working process of the thermal cycle experiment device provided in the embodiment is as follows:

[0053] 1. The sample 001 is placed on the sample disc 210, and the locking screw 342 and the locking body 233 are loosened to adjust the positions of the connecting rod 220 and the cover 230, respectively;

[0054] 2. The heating furnace 100 is started and preheating is completed;

[0055] 3. The control unit 400 is started, and the motor is reset to zero;

[0056] 4. The time interval is set, and the motion control program is started. Under the action of the motion control program, the execution unit 200 will rise and fall at the set time interval;

[0057] 5. After reaching the set time interval, the positioning unit 300 sends the sample 001 into the heating furnace 100, and stops moving when the cover 230 closes the inlet and outlet 120;

[0058] 6. After reaching the time interval again, the positioning unit 300 drives the connecting execution unit 200 to move upward, so that the sample 001 leaves the heating furnace 100; the positioning unit 300 stops moving when the sample disc 210 leaves the heating furnace 100 and the heat preservation cover 240 closes the inlet and outlet 120;

[0059] 7. During the experiment, the experimenter can observe the whole experiment process through the observation window 130;

[0060] 8. After the experiment, the heating furnace 100 is powered off, the control unit 400 is powered off, and the motor is braked to prevent the sliding block 332 from falling off.

[0061] During the process of sending the sample 001 into the heating furnace 100, the sample disc 210 is lowered, the three supporting rods 140 in the heating furnace 100 pass through the three guide holes 212 respectively, and the sample 001 in the sample disc 210 is lifted, so that the sample 001 is basically in a suspended state, the sample 001 is heated uniformly, and the accuracy of the experimental result is high.

[0062] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermal cycling apparatus, characterized by, The heat cycle experiment device comprises: a heating furnace having a furnace cavity for accommodating a sample and an inlet and outlet communicating with the furnace cavity; an execution unit comprising a sample disc, a connecting rod and a cover, the sample disc and the cover are connected with the connecting rod, the sample disc is used for carrying a sample, and the cover is used for opening or closing the inlet and outlet; and a control unit connected with the connecting rod for driving the connecting rod to slide along the extension direction of the connecting rod to make the sample disc enter or leave the furnace cavity; and after the sample disc enters the furnace cavity, the cover closes the inlet and outlet; three supporting rods are arranged inside the heating furnace, each of the supporting rods is parallel to the axis of the inlet and outlet; a guide hole penetrating the groove bottom wall is arranged on the sample disc, the guide hole is used for guiding the supporting rod to be inserted to lift the sample in the sample disc by the supporting rod; the cover comprises a fixed body, a sealing body and a locking body, the sealing body is fixedly connected with the fixed body, the sealing body and the fixed body are sleeved on the connecting rod outside and are slidably matched with the connecting rod; the locking body is screwed on the outside of the fixed body, the locking body has a first position and a second position which are switched with each other, when in the first position, the locking body abuts against the connecting rod to limit the relative sliding of the fixed body and the connecting rod; when in the second position, the locking body has a spacing with the connecting rod to allow the fixed body to slide relative to the connecting rod.

2. The heat cycle experiment device according to claim 1, wherein: the heating furnace is provided with an observation window for observing the sample in the furnace cavity.

3. The heat cycle experiment device according to claim 1, wherein: the cover is sleeved on the connecting rod outside, the cover is slidably matched with the connecting rod in the axial direction of the connecting rod; the cover and the sample disc are arranged at intervals in the axial direction of the connecting rod.

4. The heat cycle experiment device according to claim 1, wherein: the sealing body is arranged in a variable-diameter structure, the cross-sectional area of the sealing body gradually increases from one end of the sealing body close to the sample disc to the other end.

5. The heat cycle experiment device according to claim 1, wherein: the control unit comprises a rack, a driver, a transmission mechanism and a connecting mechanism, the driver is arranged on the rack, the driver is connected with the connecting mechanism through the transmission mechanism, and the connecting mechanism is connected with the connecting rod; the driver is used for transmitting power to the connecting mechanism through the transmission mechanism to drive the connecting rod to move through the connecting mechanism.

6. The heat cycle experiment device according to claim 5, wherein: the driver is arranged as a motor, the transmission mechanism comprises a lead screw and a sliding block, the lead screw is fixedly connected with the output shaft of the motor, the sliding block is screwed on the outside of the lead screw, the sliding block is slidably connected with the rack, and the sliding block and the rack are relatively fixed in the circumferential direction of the lead screw; the connecting mechanism is connected with the sliding block. 7.The thermal cycling device of claim 6, wherein: the connecting rod is slidably connected with the connecting mechanism in the axial direction of the connecting rod. 8.The thermal cycling device of claim 7, wherein: the connecting mechanism comprises a connecting post and a locking screw, the connecting post is connected with the sliding block, the end of the connecting post is provided with a clamping groove, the clamping groove has two opposite groove walls, and the connecting rod is clamped in the clamping groove; the locking screw is screwed on the connecting post, and the locking screw is used to make the two groove walls close to or away from each other, so that the two groove walls clamp or release the connecting rod. 9.The thermal cycling device of claim 1, wherein: the execution unit further comprises a heat preservation cover, the heat preservation cover is connected with the connecting rod, the sample disc is located between the heat preservation cover and the cover, and the heat preservation cover is used to close the inlet and outlet when the sample disc leaves the furnace cavity.

Images