A device for detecting the heat preservation performance of a heat preservation pipe fitting

Abstract

The application discloses a kind of heat-preservation pipe heat preservation performance detection device, specifically relates to heat preservation performance detection device technical field, including outer frame, the left side wall upper portion of inner surface in the outer frame and the right side wall upper portion of inner surface are jointly slidably installed detection assembly, the outer surface lower portion of detection assembly is fixedly installed with limiting component, the lower portion of left side wall in the inner surface of outer frame and the lower portion of right side wall in the inner surface are jointly fixedly installed with observation assembly.The heat-preservation pipe heat preservation performance detection device of the application is detected by the detection assembly, in the process, it can be cooperated with hydraulic cylinder and move downward, then the heat preservation performance of heat-preservation pipe is detected, while detection assembly and limiting component are cooperated with each other, the heat-preservation pipe can be positioned, and after limiting, it is cooperated with observation assembly, the heat preservation performance of multiple heat-preservation pipes is detected in rotation mode, the detection process of overall device is shorter, and the sampling detection of heat-preservation pipe is facilitated.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation performance testing devices, and particularly to a thermal insulation performance testing device for thermal insulation pipe fittings. Background Technology

[0002] A thermal insulation performance testing device for insulated pipe fittings is a device used to test the heat conduction and thermal insulation effect of pipes or fittings covered with insulation materials. This type of device is mainly used to detect the heat loss of insulated pipe fittings under different temperature conditions, and whether the insulation effect of the fittings meets the standard requirements during long-term use. Its working principle typically involves placing the fittings in an environment with a certain temperature difference, monitoring the temperature change and heat conduction on the surface of the fittings, thereby evaluating their insulation performance.

[0003] This type of testing device typically includes multiple temperature sensors, a data acquisition system, and heating / cooling equipment to simulate the working environment of pipe fittings at different temperatures and record temperature changes in real time. By monitoring the outer surface temperature, inner surface temperature, and ambient temperature of the pipe fittings, the thermal resistance value of the insulation material and the quality of its insulation effect can be accurately determined. These devices are widely used in pipelines, air conditioning, hot water systems, industrial facilities, and other fields to ensure that the performance of insulation materials meets relevant standards.

[0004] However, a major problem with existing thermal insulation performance testing devices is their long testing time. This is because traditional testing methods typically require a considerable amount of time to stabilize temperature changes and measure temperature gradients, making the entire testing process time-consuming. For applications requiring sampling inspections, the testing time becomes a critical issue. Sampling inspections usually need to be completed within a short time to quickly determine whether a product meets standards. However, existing devices have a cumbersome testing process and cannot provide effective test results in a short time, thus failing to meet the needs of sampling inspections.

[0005] Chinese Patent Publication No. CN118961801B discloses a testing device for the thermal insulation performance of insulated pipe fittings, including a pipe fitting and a partition fixed in the middle of the pipe fitting. Winding shafts are rotatably mounted on both sides of the partition. The two ends of a traction rope are respectively wound around the two winding shafts. A heat flow meter for temperature measurement is connected to the traction rope through a connecting structure. A friction roller is coaxially fixed to the end face of the winding shaft. When testing long, large insulated pipes, the testing device provided by this invention allows the heat flow meter to move along the axial direction of the insulated pipe through the cooperation of the driving and transmission structures, thereby detecting the temperature at different locations on the insulated pipe. This not only saves the time required for data sampling by testing personnel but also reduces their workload.

[0006] While the equipment described in the aforementioned patent documents can be used to test the insulation performance of insulated pipe fittings, the testing process is too cumbersome in actual use and cannot achieve batch sampling testing, thus reducing the overall efficiency of insulation performance testing. Summary of the Invention

[0007] The main objective of this invention is to provide a device for testing the thermal insulation performance of thermal insulation pipe fittings, which can effectively solve the problems in the background art.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A device for testing the thermal insulation performance of insulated pipe fittings includes an outer frame. A hydraulic cylinder is fixedly connected to the upper middle part of the outer frame. A testing component for detecting the thermal insulation performance of insulated pipe fittings for condensation detection is slidably installed on the upper part of the left side wall and the upper part of the right side wall of the inner surface of the outer frame. A limiting component for assisting driving and limiting the insulated pipe fittings is fixedly installed on the lower part of the outer surface of the testing component. An observation component for observing the thermal insulation performance of insulated pipe fittings is fixedly installed on the lower part of the left side wall and the lower part of the right side wall of the inner surface of the outer frame.

[0010] Preferably, the detection component includes two support plates, which are slidably connected at opposite ends to the upper left side wall and the upper right side wall of the inner surface of the outer frame, respectively. A hollow disc is fixedly connected at the opposite ends of the two support plates. The upper end of the hollow disc is fixedly connected to the output end of the hydraulic cylinder via a piston rod. A water inlet penetrating the lower end of the hollow disc is provided at the center of the front side of the upper end of the hollow disc. A large gear is rotatably connected to the center of the bottom wall of the hollow disc's inner cavity, and a small gear is rotatably connected to the center of the right side of the bottom wall of the hollow disc's inner cavity. The large gear and the small gear mesh with each other. Condensation plates are fixedly connected to the center edge of the right side and the center edge of the left side of the lower end of the hollow disc.

[0011] Preferably, the limiting component includes a transmission rod, the upper end of which passes through the middle of the lower end of the hollow disc and is fixedly connected to the middle of the lower end of the large gear. A cross plate is fixedly connected to the middle of the outer surface of the transmission rod. Hollow rings are fixedly connected to the ends of the cross plates that are far apart from each other. Arc-shaped plates are fixedly connected to the sides of the outer surfaces of the four hollow rings that are close to each other.

[0012] Preferably, the observation assembly includes two fixed plates. The ends of the two fixed plates that are far apart from each other are respectively fixedly connected to the lower part of the left side wall and the lower part of the right side wall of the inner surface of the outer frame. The ends of the two fixed plates that are close to each other are rotatably connected to a turntable. A transparent cylinder is rotatably connected to the lower end of the turntable. The left and right sides of the outer surface of the transparent cylinder are fixedly connected to the left side wall and the right side wall of the inner surface of the outer frame through connecting rods. A limiting groove is opened in the middle of the upper end of the turntable. Four insertion holes penetrating the lower end are opened in a circular array on the outer side of the upper end of the turntable. A heating mechanism is fixedly installed on the bottom wall of the transparent cylinder.

[0013] Preferably, an annular platform is fixedly connected to the middle of the inner surface of each of the four sockets, and an interconnected annular groove is opened on the lower part of the inner surface of the four sockets. The bottom wall of the annular groove is electrically connected to four driving discs.

[0014] Preferably, the outer diameter of the four drive disks is larger than the inner diameter of the four sockets.

[0015] Preferably, a water pump is fixedly connected to the middle of the front side of the upper end of the hollow disc, and a retractable water pipe is fixedly connected to the input end of the water pump. The other end of the retractable water pipe is connected to the lower rear side of the outer surface of the transparent cylinder, and the output end of the water pump is aligned with the water inlet.

[0016] Preferably, a drive motor is fixedly connected to the middle of the upper right side of the hollow disk, and the output end of the drive motor passes through the hollow disk and is fixedly connected to the middle of the upper end of the pinion via a coupling.

[0017] Preferably, a limiting block that cooperates with the limiting groove is fixedly connected to the lower end of the transmission rod.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention features a detection component that, during use, can cooperate with a hydraulic cylinder to move downwards and then test the insulation performance of the insulated pipe fittings. Simultaneously, the detection component and the limiting component work together to limit the insulation pipe fittings, and after limiting, they cooperate with the observation component to achieve rotational insulation performance testing of multiple insulated pipe fittings. The overall testing process is short, making it convenient for sampling testing of insulated pipe fittings.

[0020] This invention, through the setting of an observation component, allows for a direct and intuitive observation of the insulation efficiency of the insulation pipe during use. If the insulation efficiency is good, the water in the insulation pipe will flow into the observation component in liquid form for storage. If the insulation efficiency is poor, ice slag will be present in the liquid flowing into the observation component, making it easier for personnel to observe the insulation efficiency of the insulation pipe. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0023] Figure 3 This is a bottom-view schematic diagram of the overall structure of the present invention;

[0024] Figure 4 This is a schematic diagram of another state of the overall structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the front view structure of the detection component of the present invention;

[0026] Figure 6 This is a schematic diagram of the overall structure of the detection component and the limiting component of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation location structure of the observation component of the present invention;

[0028] Figure 8 This is a schematic cross-sectional view of a partial structure of the observation component of the present invention;

[0029] Figure 9 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0030] In the diagram: 1. Outer frame; 2. Hydraulic cylinder; 3. Detection component; 31. Support plate; 32. Hollow disc; 33. Water inlet; 34. Large gear; 35. Small gear; 36. Condensation plate; 4. Limiting component; 41. Transmission rod; 42. Cross plate; 43. Hollow ring; 44. Arc plate; 441. Limiting block; 5. Observation component; 51. Fixing plate; 52. Turntable; 53. Transparent cylinder; 54. Limiting groove; 55. Insertion hole; 56. Circular platform; 57. Circular groove; 58. Drive disc; 6. Water pump; 7. Telescopic water pipe; 8. Drive motor. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Example 1, as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a device for testing the thermal insulation performance of insulated pipe fittings includes an outer frame 1. A hydraulic cylinder 2 is fixedly connected to the upper middle part of the outer frame 1. A testing component 3 for detecting the thermal insulation performance of insulated pipe fittings for condensation detection is slidably installed on the upper part of the left side wall and the upper part of the right side wall of the inner surface of the outer frame 1. A limiting component 4 for assisting driving and limiting the thermal insulation pipe fittings is fixedly installed on the lower part of the outer surface of the testing component 3. An observation component 5 for observing the thermal insulation performance of insulated pipe fittings is fixedly installed on the lower part of the left side wall and the lower part of the right side wall of the inner surface of the outer frame 1.

[0033] During use, the sampled insulation pipe fitting can be placed on the upper side of the observation component 5. Then, the hydraulic cylinder 2 is activated, causing the detection component 3 to move downwards. During the downward movement of the detection component 3, the limiting component 4 installed on its surface can be fitted onto the surface of the insulation pipe fitting. Then, the detection component 3 can make the limiting component 4 engage with the surface of the observation component 5, and cause the insulation pipe fitting to rotate slowly on the upper side of the observation component 5. The slow rotation speed of the observation component 5 allows the detection component 3 to fully condense on the surface of the insulation pipe fitting, thereby realizing the detection of the insulation performance of the insulation pipe fitting. If the insulation performance of the insulation pipe fitting is good, the water in the insulation pipe fitting will remain liquid after condensation by the detection component 3 and be poured into the observation component 5 for storage. If the insulation performance is poor, the water poured into the observation component 5 will contain ice. The insulation performance of the insulation pipe fitting can be quickly determined by observing the observation component 5.

[0034] Therefore, the device designed in this scheme is suitable for rapid sampling and detection, reducing the detection time.

[0035] Example 2, as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in this embodiment, the detection component 3 includes two support plates 31. The two support plates 31 are slidably connected to the upper left side wall and the upper right side wall of the inner surface of the outer frame 1, respectively, at their ends that are far apart from each other. The two support plates 31 are fixedly connected to a hollow disk 32 at their ends that are close to each other. The upper end of the hollow disk 32 is fixedly connected to the output end of the hydraulic cylinder 2 through a piston rod. A water inlet 33 is provided in the middle of the front side of the upper end of the hollow disk 32, penetrating the lower end of the hollow disk 32. A large gear 34 is rotatably connected to the middle of the bottom wall of the inner cavity of the hollow disk 32. A small gear 35 is rotatably connected to the middle of the right side of the bottom wall of the inner cavity of the hollow disk 32. The large gear 34 and the small gear 35 mesh with each other. A condensation plate 36 is fixedly connected to the middle edge of the right side and the middle edge of the left side of the lower end of the hollow disk 32.

[0036] Furthermore, the limiting component 4 includes a transmission rod 41, the upper end of which passes through the middle of the lower end of the hollow disc 32 and is fixedly connected to the middle of the lower end of the large gear 34. A cross plate 42 is fixedly connected to the middle of the outer surface of the transmission rod 41. Hollow rings 43 are fixedly connected to the ends of the cross plates 42 that are far apart from each other. Arc plates 44 are fixedly connected to the sides of the outer surfaces of the four hollow rings 43 that are close to each other.

[0037] Furthermore, the observation component 5 includes two fixed plates 51. The ends of the two fixed plates 51 that are far apart from each other are respectively fixedly connected to the lower part of the left side wall and the lower part of the right side wall of the inner surface of the outer frame 1. The ends of the two fixed plates 51 that are close to each other are rotatably connected to a turntable 52. The lower end of the turntable 52 is rotatably connected to a transparent cylinder 53. The left and right sides of the outer surface of the transparent cylinder 53 are fixedly connected to the left side wall and the right side wall of the inner surface of the outer frame 1 through connecting rods. A limiting groove 54 is opened in the middle of the upper end of the turntable 52. Four insertion holes 55 penetrating the lower end are opened in a circular array on the outer side of the upper end of the turntable 52. A heating mechanism is fixedly installed on the bottom wall of the transparent cylinder 53.

[0038] Furthermore, an annular platform 56 is fixedly connected to the middle of the inner surface of each of the four sockets 55, and an annular groove 57 that is interconnected is opened on the lower part of the inner surface of the four sockets 55. Four drive discs 58 are electrically connected to the bottom wall of the annular groove 57.

[0039] Furthermore, the outer diameter of the four drive discs 58 is larger than the inner diameter of the four sockets 55.

[0040] Furthermore, a water pump 6 is fixedly connected to the middle of the front side of the upper end of the hollow disc 32. A retractable water pipe 7 is fixedly connected to the input end of the water pump 6. The other end of the retractable water pipe 7 is connected to the lower rear side of the outer surface of the transparent cylinder 53. The output end of the water pump 6 is aligned with the water inlet 33.

[0041] Furthermore, a drive motor 8 is fixedly connected to the middle of the upper right side of the hollow disk 32. The output end of the drive motor 8 passes through the hollow disk 32 and is fixedly connected to the middle of the upper end of the pinion 35 through a coupling.

[0042] Furthermore, a limiting block 441 that cooperates with the limiting groove 54 is fixedly connected to the lower end of the transmission rod 41.

[0043] During use, the sampled insulation pipe is first placed in the four sockets 55 in sequence, and the lower end of the insulation pipe is supported by the ring platform 56 on the same side. At this time, the drive discs 58 on the same side are located directly below the insulation pipe, thereby blocking the lower end of the insulation pipe.

[0044] Then, by activating the hydraulic cylinder 2, the output end of the hydraulic cylinder 2 drives the hollow disc 32, which is fixedly connected to it, to move downward through the piston rod. When the hollow disc 32 moves downward, the support plates 31 fixedly connected to both sides of the hollow disc 32 are slidably connected to the left side wall and the right side wall of the inner surface of the outer frame 1, respectively. Therefore, when the hollow disc 32 moves downward, the support plates 31 on both sides play a limiting and guiding role.

[0045] When the hollow disc 32 moves downward, since the upper end of the transmission rod 41 is fixedly connected to the middle of the lower end of the large gear 34, the transmission rod 41 can simultaneously drive the cross plate 42 to move downward, and the cross plate 42 drives the hollow ring 43 and the arc plate 44 fixedly connected to it to move downward at the same time. When the hollow ring 43 moves downward, since the inner diameter of the four hollow rings 43 is slightly larger than the outer diameter of the insulation pipe fitting, the four hollow rings 43 can be fitted onto the outside of the insulation pipe fitting.

[0046] After the hollow disc 32 completes its downward movement, the lower ends of the condenser plates 36 on both sides are now in contact with the upper side of the turntable 52, as shown below. Figure 4 As shown;

[0047] As the hollow disc 32 moves downward, the water pump 6 fixedly connected to its upper end also moves downward. When the telescopic water pipe 7 fixedly connected to the input end of the water pump 6 retracts as the pump moves downward, the pump 6 is activated. This causes the water from the inner cavity of the observation component 5 to be sprayed from its output end into the water inlet 33 through the telescopic water pipe 7. When the hollow disc 32 completes its downward movement, the upper end of the insulation pipe and the lower end of the hollow disc 32 are in contact with each other, and the hollow ring 43 on the front side is centered on the water inlet 33. Therefore, water will flow from the water inlet 33. The water is injected into the corresponding insulation pipe fitting, and then the water injection is stopped. The drive motor 8 is started, so that the output end of the drive motor 8 drives the small gear 35 fixedly connected to it to rotate through the coupling. When the small gear 35 rotates, the large gear 34 meshes with it, so the large gear 34 also rotates. When the lower end of the large gear 34 drives the transmission rod 41 fixedly connected to its lower end to rotate a quarter turn, the transmission rod 41 drives the hollow ring 43 to rotate a quarter turn through the cross plate 42, so that the next hollow ring 43 moves to the lower side of the water injection port 33. Then the water injection operation described above can be repeated.

[0048] After filling all the insulation pipes with water, the drive motor 8 can be started to drive the pinion 35 to rotate. Since the outer diameter of the pinion 35 is smaller than that of the large gear 34, the large gear 34 rotates at a slower speed. The actual rotation speed can be adjusted by adjusting the output power of the drive motor 8 according to the test requirements.

[0049] At the same time, when the hollow disc 32 moves downward, the limiting block 441 fixedly connected to the lower end of the transmission rod 41 is precisely engaged in the limiting groove 54. Therefore, when the large gear 34 rotates, the limiting block 441 drives the turntable 52 to rotate on the upper side of the transparent cylinder 53, thereby driving the insulation pipe placed on the upper side of the annular platform 56 to rotate. Then, by activating the condensing plates 36 on both sides, the condensing plates 36 continuously condense the surface of the insulation pipe. After condensation for a period of time, the drive motor 8 can be stopped so that the lower ends of the four insulation pipes coincide with the lower side of the insertion hole 55.

[0050] Then, by controlling the four drive discs 58, the four drive discs 58 are offset from the bottom of the insulation pipe in the annular groove 57. At this time, the lower side of the insulation pipe is connected to the lower side of the insertion hole 55. If the insulation effect of the insulation pipe is good, the water in the insulation pipe will still flow into the transparent cylinder 53 in a liquid state. If the insulation effect of the insulation pipe is poor, there will be ice slag in the liquid flowing into the transparent cylinder 53. This can be observed by observing the surface of the transparent cylinder 53. The transparent cylinder 53 can be set to a transparent state. During the observation, personnel can use a marker to mark the surface of the insulation pipe with poor insulation effect.

[0051] After the test is completed, the hydraulic cylinder 2 can be controlled to move the test component 3 and the limit component 4 upward to return to the initial state. At the same time, the four drive discs 58 can be controlled to move back to the initial position. The heating mechanism installed on the bottom wall of the transparent cylinder 53 can be controlled to heat and melt the ice in the inner cavity of the transparent cylinder 53, so that the water in the transparent cylinder 53 can be extracted again by the water pump 6 and the telescopic water pipe 7 for subsequent recycling.

[0052] The heating mechanism mentioned above is a conventional setup in the prior art. Specifically, it consists of heating resistance wires as in the prior art. In this solution, it is only necessary to install it on the bottom wall of the transparent cylinder 53 for heating treatment. Its specific installation method, circuit connection method, and control method are all conventional designs, so this solution will not elaborate on them in detail.

[0053] The installation and connection methods of the four drive discs 58 mentioned above are all conventional settings in the prior art. In this solution, it is only necessary to ensure that when it is necessary to block the lower side of the insulation pipe during use, the discs are controlled to roll in the inner cavity of the annular groove 57 to move away from the lower side of the insulation pipe. A DC motor or stepper motor is installed inside to directly drive the drive discs 58 to rotate. The motor should transmit torque through gears or direct connection. Therefore, the specific installation method, circuit connection method and control method are all conventional designs, and this solution will not elaborate on them in detail.

[0054] The two condenser plates 36 mentioned above are conventional designs in the prior art, and their specific working principles are as follows:

[0055] Steam or hot gas enters the condenser plate 36 through pipes. The condenser plate 36 is usually composed of one or more metal plates with tiny channels or passages for the gas to pass through.

[0056] On the condenser plate 36, heat exchange occurs between the gas and the plate surface. The plate surface generally has a large surface area, which makes the heat exchange between the gas and the cooling medium, such as water or air, more efficient.

[0057] When the gas comes into contact with the surface of the condenser plate 36, heat is transferred from the gas to the plate through the thermal conduction effect, and then carried away by the cooling medium. The gas temperature decreases until it condenses and turns into liquid. The condensed liquid is discharged through the drainage system designed on the plate.

[0058] Heat is transferred to the cooling medium through the metal material of the condenser plate 36. The structural design of the plate, such as increasing the surface area and the number of flow channels, helps to improve the heat exchange efficiency, thereby accelerating the gas cooling and condensation process. Whether in the condenser or the condenser plate 36, heat transfer mainly relies on two processes: heat conduction through the metal pipes or plates and convection contact with the cooling medium. The heat of the gas is transferred to the metal material through the contact between the gas and the surface of the pipes or plates. The metal has strong thermal conductivity and can effectively carry away the heat of the gas. Once the heat is transferred to the cooling medium, such as cooling water or air, through the metal, these media will further carry away the heat. In liquid cooling systems, the flow of cooling water will carry away the heat; in air cooling systems, the flow of air will help carry away the heat.

[0059] Therefore, the condenser plate 36 mentioned above is a conventional design in the prior art. Its specific installation method, circuit connection method and control method are all conventional designs, and this solution will not elaborate on them further.

[0060] The aforementioned telescopic water pipe 7 is a conventional design in the prior art, utilizing novel synthetic materials with high elasticity and tensile strength, such as polyurethane or elastic rubber. These materials can stretch under external force and return to their original shape after the force is removed. Polyurethane has strong wear resistance, corrosion resistance, and high elongation, enabling the telescopic water pipe 7 to work effectively in various environments. The telescopic water pipe 7 typically consists of a flexible hose and an outer sheath. The hose itself is made of a stretchable material, while the outer sheath protects the hose, prevents wear, and increases strength. The inner wall of the hose is designed with a spiral or corrugated structure, which allows the hose to expand evenly under water pressure, increasing the pipe's elongation capacity.

[0061] Therefore, the telescopic water pipe 7 is a standard feature in existing technology, and this solution will not elaborate on it further.

[0062] It should be noted that the specific installation methods, circuit connection methods, and control methods of the hydraulic cylinder 2, water pump 6, and drive motor 8 used in this invention are all conventional designs, and will not be described in detail here.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the thermal insulation performance of thermal insulation pipe fittings, comprising an outer frame (1), characterized in that: A hydraulic cylinder (2) is fixedly connected to the upper middle part of the outer frame (1). A detection component (3) for detecting the insulation performance of the insulation pipe fitting is slidably installed on the upper part of the left side wall and the upper part of the right side wall of the inner surface of the outer frame (1). A limiting component (4) for assisting driving and limiting the insulation pipe fitting is fixedly installed on the lower part of the outer surface of the detection component (3). An observation component (5) for observing the insulation performance of the insulation pipe fitting is fixedly installed on the lower part of the left side wall and the lower part of the right side wall of the inner surface of the outer frame (1). The detection component (3) includes two support plates (31). The two support plates (31) are slidably connected to the upper left side wall and the upper right side wall of the inner surface of the outer frame (1) at one end away from each other. The two support plates (31) are fixedly connected to a hollow disk (32) at one end close to each other. The upper end of the hollow disk (32) is fixedly connected to the output end of the hydraulic cylinder (2) through a piston rod. A water inlet (33) is opened in the middle of the front side of the upper end of the hollow disk (32) and passes through the lower end of the hollow disk (32). A large gear (34) is rotatably connected to the middle of the bottom wall of the inner cavity of the hollow disk (32). A small gear (35) is rotatably connected to the middle of the right side of the bottom wall of the inner cavity of the hollow disk (32). The large gear (34) and the small gear (35) mesh with each other. A condensing plate (36) is fixedly connected to the middle edge of the right side and the middle edge of the left side of the lower end of the hollow disk (32). The limiting component (4) includes a transmission rod (41). The upper end of the transmission rod (41) passes through the middle of the lower end of the hollow disc (32) and is fixedly connected to the middle of the lower end of the large gear (34). A cross plate (42) is fixedly connected to the middle of the outer surface of the transmission rod (41). Hollow rings (43) are fixedly connected to the ends of the cross plates (42) that are far apart from each other. An arc plate (44) is fixedly connected to the side of the outer surface of the four hollow rings (43) that are close to each other. The observation component (5) includes two fixed plates (51). The ends of the two fixed plates (51) that are far apart from each other are respectively fixedly connected to the lower part of the left side wall and the lower part of the right side wall of the inner surface of the outer frame (1). The ends of the two fixed plates (51) that are close to each other are rotatably connected to a turntable (52). The lower end of the turntable (52) is rotatably connected to a transparent tube (53). The left and right sides of the outer surface of the transparent tube (53) are fixedly connected to the left side wall and the right side wall of the inner surface of the outer frame (1) through connecting rods. A limiting groove (54) is opened in the middle of the upper end of the turntable (52). Four insertion holes (55) penetrating the lower end are opened in a ring array on the outer side of the upper end of the turntable (52). A heating mechanism is fixedly installed on the bottom wall of the transparent tube (53). An annular platform (56) is fixedly connected to the middle of the inner surface of each of the four sockets (55). An annular groove (57) is opened in the lower part of the inner surface of each of the four sockets (55). Four driving discs (58) are electrically connected to the bottom wall of the annular groove (57).

2. The thermal insulation performance testing device for thermal insulation pipe fittings according to claim 1, characterized in that: The outer diameter of the four drive disks (58) is larger than the inner diameter of the four sockets (55).

3. The thermal insulation performance testing device for thermal insulation pipe fittings according to claim 1, characterized in that: A water pump (6) is fixedly connected to the middle of the front side of the upper end of the hollow disc (32). A telescopic water pipe (7) is fixedly connected to the input end of the water pump (6). The other end of the telescopic water pipe (7) is connected to the lower rear side of the outer surface of the transparent cylinder (53). The output end of the water pump (6) is aligned with the water inlet (33).

4. The thermal insulation performance testing device for thermal insulation pipe fittings according to claim 3, characterized in that: A drive motor (8) is fixedly connected to the middle of the right side of the upper end of the hollow disk (32). The output end of the drive motor (8) passes through the hollow disk (32) and is fixedly connected to the middle of the upper end of the pinion (35) through a coupling.

5. The thermal insulation performance testing device for thermal insulation pipe fittings according to claim 1, characterized in that: The lower end of the transmission rod (41) is fixedly connected to a limiting block (441) that cooperates with the limiting groove (54).

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