Thermal insulation device based on air wall principle

Abstract

The utility model relates to the technical field of high and low temperature testing, and discloses a thermal insulation device based on an air wall principle, which comprises an upper air template and a lower air template, two connecting bolts are sleeved between the upper air template and the lower air template in a threaded manner, and air pipes are connected in the middle of the opposite sides of the upper air template and the lower air template in a penetrating manner. Three-way pipes are fixedly arranged on the opposite sides of the interiors of the upper air template and the lower air template correspondingly, and two copper pipes are fixedly arranged between the two output ends of the two three-way pipes correspondingly. According to the air wall forming mechanism, cold air and hot air can be effectively isolated, so that a transmission shaft system or related equipment does not need to be made of high-temperature-resistant or low-temperature-resistant special materials, the cost is remarkably reduced, meanwhile, the device operates autonomously in a test room, manual intervention is not needed, and the working efficiency is improved. And the safety of the test process is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high and low temperature testing, in particular to a heat insulation device based on the principle of air wall. Background Technique

[0002] With the increasing attention of consumers to environmental protection and energy efficiency, the electric vehicle market has expanded rapidly, driving the demand and development of motor detection technology. Governments and industry standards in various countries have put forward higher requirements for the performance, safety and reliability of electric vehicles, which has promoted the continuous progress and update of detection technology. The present invention is precisely based on the increasingly strict requirements for meeting the working performance requirements of motors in high and low temperature environments, thus a heat insulation device needs to be designed.

[0003] During the high and low temperature testing process of traditional motors, the commonly adopted strategy is to replace with equipment or materials that can withstand extreme temperatures (whether high or low), or to select equipment materials that can adapt to both high and low temperature environments. However, this method significantly increases the construction cost of the test bench. If the future test requirements are further improved, requiring the motor to withstand higher or lower temperatures, then the entire test equipment must be transformed and upgraded, which will undoubtedly consume a lot of time, energy and cost. Therefore, those skilled in the art have provided a heat insulation device based on the principle of air wall to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a heat insulation device based on the principle of air wall is proposed. This device utilizes the formation principle of the air wall to isolate hot and cold air, so that the drive shaft system or equipment does not need to replace high-temperature or low-temperature resistant materials, greatly saving costs.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A heat insulation device based on the principle of air wall, including an upper air template and a lower air template. Two connecting bolts are threadedly sleeved between the upper air template and the lower air template. Air pipes are respectively penetrated and connected at the middle positions on the opposite sides of the upper air template and the lower air template;

[0007] Three-way pipes are fixedly arranged on the relatively inner sides of the upper air template and the lower air template. Two copper pipes are respectively fixedly arranged between the two output ends of the two three-way pipes;

[0008] Through the above technical solutions, the isolation of hot and cold air is realized according to the formation principle of the air wall, so that there is no need to replace the original high-temperature or low-temperature resistant materials of the drive shaft system or equipment, significantly reducing the cost.

[0009] Furthermore, a plurality of fixing bolt holes are provided between the front and rear ends of the upper and lower air templates;

[0010] Through the above technical solution, the structural stability of the upper and lower air templates is improved, the stable formation of the air wall is ensured, and the stability after formation is ensured.

[0011] Further, the two air pipes are fixedly connected to the input ends of the two three-way pipes respectively;

[0012] Through the above technical solution, the air pipe can smoothly input the gas into the interior of the two copper tubes through the two three-way pipes, thereby facilitating the formation of the air wall.

[0013] Furthermore, a plurality of air holes are opened on opposite sides of the two copper tubes, and nozzles are fixedly arranged inside the plurality of air holes;

[0014] Through the above technical solution, after the gas enters the interior of the copper tube, it can be sprayed out through multiple air holes and nozzles, thereby realizing the formation of an air wall.

[0015] Further, the shape of the plurality of pores is circular, the pore size is 2 mm, the length of the air flow channel is 500 mm, and the number of the plurality of nozzles is 14 and is evenly distributed around the circumference;

[0016] Through the above technical solution, the gas can be ejected evenly from the inside of the copper tube, and the aperture size is fixed, which facilitates the calculation of the air flow velocity.

[0017] The utility model has the following beneficial effects:

[0018] 1. The utility model proposes a thermal insulation device based on the air wall principle. Based on the principle of air wall construction, the device ingeniously realizes the effective isolation of cold and hot air, thereby ensuring that the transmission shaft system or related equipment does not need to replace specific high-temperature or low-temperature resistant materials, which significantly reduces manufacturing costs and operating costs.

[0019] 2. The utility model proposes a temperature insulation device based on the air wall principle. The device operates autonomously in a controlled laboratory environment without direct human intervention, which significantly improves the safety and efficiency of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the axial side of the utility model;

[0021] Figure 2 It is a front view schematic diagram of the utility model;

[0022] Figure 3 This is a performance state diagram of the thermal insulation device of the utility model under a pressure of 2.5kpa;

[0023] Figure 4 This is the temperature distribution diagram of the thermal insulation device of the utility model under a pressure of 2.5kpa;

[0024] Figure 5 This is the temperature distribution diagram of the utility model under the 160°C working condition without any measures.

[0025] Legend:

[0026] 1. On the air template; 2. Copper tube; 3. Tee pipe; 4. Air pipe; 5. Under the air template; 6. Connecting bolts; 7. Fixing bolt holes. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0028] Reference Figure 1-2 The utility model provides an embodiment: a temperature insulation device based on the air wall principle, including an upper air template 1 and a lower air template 5, two connecting bolts 6 are threadedly sleeved between the upper air template 1 and the lower air template 5, air pipes 4 are penetrated and connected in the middle of the opposite sides of the upper air template 1 and the lower air template 5, three-way pipes 3 are fixedly arranged on the opposite sides of the upper air template 1 and the lower air template 5, and two copper tubes 2 are fixedly arranged between the two output ends of the two three-way pipes 3;

[0029] Specifically, in the above-mentioned specific embodiment, the isolation of hot and cold air is achieved according to the formation principle of the air wall, so there is no need to replace the transmission bearing or the original high-temperature or low-temperature resistant material of the equipment, which significantly reduces the cost. In the connection process, the first step is to accurately connect the copper tube 2 through the three-way pipe 3. Then, the connected copper tube 2 is securely placed in the specified position of the lower air template 5. Next, the upper air template 1 and the lower air template 5 are tightly fixed with the connecting bolts 6 to ensure that the copper tube 2 is fully and firmly supported and positioned. Thereafter, the air pipe 4 is accurately installed on the lower sides of the upper air template 1. At this point, the installation of the insulation device is successfully completed. During the use of the device, the hydraulic station serves as a power source to accurately deliver high-pressure air to the inside of the copper tube 2 through the air pipe 4. Subsequently, the air is evenly ejected through the small holes densely distributed on the surface of the copper tube 2 to form a solid air barrier. This air wall can effectively block the heat transfer of the external high-temperature environment and achieve an efficient insulation effect.

[0030] A plurality of fixing bolt holes 7 are provided through between the front and rear ends of the upper air template 1 and the lower air template 5;

[0031] Specifically, in the above specific embodiment, the fixing bolt holes 7 improve the structural stability of the upper air template 1 and the lower air template 5, ensure the stable formation of the air wall, and ensure the stability after formation, and facilitate the installation and fixation of the device.

[0032] Two air pipes 4 are respectively fixedly connected to the input ends of two three-way pipes 3. A plurality of air holes are provided on the opposite inner sides of the two copper pipes 2. Nozzles are fixedly arranged inside the plurality of air holes. The shapes of the plurality of air holes are circular, the aperture size is 2 mm, the air flow channel length is 500 mm, and the number of the plurality of nozzles is 14 and they are evenly distributed in a circumferential manner;

[0033] Specifically, in the above specific embodiment, the air pipes 4 can effectively and respectively introduce gas into the interiors of the two copper pipes 2 through the two three-way pipes 3, which greatly promotes the formation process of the air wall. When the gas successfully enters the copper pipes 2, they will be evenly ejected through a plurality of carefully designed air holes and nozzles, thus ensuring the effective construction of the air wall. During this process, the aperture of the copper pipes 2 remains constant, which provides great convenience for the calculation of the air flow velocity.

[0034] In order to accurately calculate the air flow velocity that the air wall can effectively isolate, the Bernoulli equation can be used as a calculation tool. Under steady-state conditions, the Bernoulli equation precisely reveals the complex relationship between the pressure, velocity, and height of the fluid at different positions.

[0035] First, clarify the pressure difference between the two sides as the cornerstone of the calculation.

[0036] Then the velocity at the nozzle outlet is another key parameter, which can be accurately obtained through a specific formula:

[0037] v = (copper pipe 2 * (P - (P + 0.1)) * r^2) / (ρ * L)

[0038] In this formula, v represents velocity, P represents the pressure difference (i.e., P - (P + 0.1)), r is the radius of the circular pipe, ρ is the air density (a constant value, approximately 1.225 kg / m^3), and L is the length of the air flow channel.

[0039] Illustrated with a specific example: Under the condition of a temperature of 160°C, one side of the air wall bears the atmospheric pressure, while the other side is slightly higher than the atmospheric pressure, specifically 0.1 kPa. The nozzle is circular with a pore diameter of 2 mm. The length of the air flow channel is set to 500 mm. The total number of nozzles is 14, and they are evenly distributed along the circumference. The radius of the circular tube is 3 mm. Substituting these specific values into the above formula can accurately calculate the total air flow velocity, which is sufficient to form an effective air wall, thereby significantly reducing the high-temperature air from 160°C to approximately 72°C, as Figure 3-4 shown, so that this device can achieve reliable protection for the drive shaft system. Embodiment 2

[0040] As Figure 5 shown, an embodiment provided by the present utility model shows the temperature distribution without any measures under the working condition of 160°C.

[0041] Finally, it can be seen from the above embodiments that this heat insulation device very effectively isolates the hot air and plays a very good protective role for the shaft system.

[0042] Working principle: When preparing to ventilate, first connect the copper tube 2 through the three-way pipe 3. Pay attention to the orientation of the small holes on the copper tube 2 during connection. Then place the connected copper tube 2 under the air template 5. Fix the upper air template 1 and the lower air template 5 through the connecting bolts 6, thereby completely fixing the copper tube 2. Then fix the heat insulation device at the required position through the copper tube 2 fixing bolt holes 7. Fix the air pipe 4 on both sides of the upper and lower parts of the air template 1, thus completing the installation of the heat insulation device. During use, the hydraulic station transports air to the copper tube 2 through the air pipe 4, and forms an air wall through the small holes on the copper tube 2 to effectively isolate the high temperature.

[0043] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A temperature insulation device based on the air wall principle, comprising an upper air template (1) and a lower air template (5), characterized in that: Two connecting bolts (6) are threadedly sleeved between the upper gas template (1) and the lower gas template (5), and air pipes (4) are penetrated and connected in the middle of the opposite sides of the upper gas template (1) and the lower gas template (5); A three-way pipe (3) is fixedly arranged on opposite sides of the upper air template (1) and the lower air template (5), and two copper pipes (2) are fixedly arranged between the two output ends of the two three-way pipes (3).

2. The temperature insulation device based on the air wall principle according to claim 1 is characterized in that: A plurality of fixing bolt holes (7) are provided between the front and rear ends of the upper air template (1) and the lower air template (5).

3. The temperature insulation device based on the air wall principle according to claim 1 is characterized in that: The two air pipes (4) are respectively fixedly connected to the input ends of the two three-way pipes (3).

4. The temperature insulation device based on the air wall principle according to claim 1 is characterized in that: A plurality of air holes are provided on opposite sides of the two copper tubes (2), and nozzles are fixedly arranged inside the plurality of air holes.

5. The temperature insulation device based on the air wall principle according to claim 4 is characterized in that: The shape of the plurality of air holes is circular, the aperture size is 2 mm, the length of the air flow channel is 500 mm, and the number of the plurality of nozzles is 14 and is evenly distributed around the circumference.

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