Hot and cold impact testing machine for reliability inspection of network transformer

Abstract

The invention discloses a hot and cold impact testing machine for reliability inspection of a network transformer, and belongs to the technical field of hot and cold impact testing machines. The hot and cold impact testing machine comprises a testing box, the interior of the testing box is divided into a refrigerating bin and a heating bin through a heat insulation plate, a blocking groove is formed in the middle of the heat insulation plate, a groove is formed in the surface of the blocking groove, and a storage box is arranged in a through groove; sealing plates are arranged at the top and the bottom of the storage box, a sealing gasket is arranged on one side of each sealing plate, a filtering box is arranged at the top of the test box, a fan is arranged at one end of the filtering box, multiple layers of air filtering pieces and an activated carbon adsorption layer are sequentially arranged in the filtering box, and a telescopic pipe is arranged in the filtering box. After being filtered and adsorbed by the filtering air sheet and the activated carbon adsorption layer, the air is guided into the storage box, so that the normal-temperature air is neutralized with the high temperature or low temperature in the storage box and gradually tends to the external temperature, and therefore, the cooling or heating efficiency is improved, the test time is shortened, and the purpose of saving energy is achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of thermal shock testing machines, specifically relating to a thermal shock testing machine for network transformer reliability inspection. Background Technology

[0002] Network transformers (also known as data pumps or network isolation transformers) are key components in network equipment used for signal processing and protection. They mainly perform functions such as signal coupling, electrical isolation, impedance matching, and electromagnetic interference suppression. They enhance the differential signal output by the PHY chip through differential-mode coupling coils and adapt network cable connections with different voltage levels through electromagnetic field conversion. They isolate the grounding differences between the devices at both ends of the network cable, preventing current surges caused by potential differences, while protecting the chip from external electromagnetic interference or electrostatic damage. Common-mode inductors can effectively suppress common-mode noise without attenuating differential-mode signals, thus improving communication stability. During the production and processing of network transformers, thermal shock tests are required to test their reliability.

[0003] Currently, most existing thermal shock testing machines for network transformer reliability inspection use a suspended basket lifted by steel cables. This causes the basket to easily collide with the inner wall of the partition between the heating and cooling chambers during use, resulting in shaking and noise, which affects the service life of the equipment. Moreover, the temperature transition time within the basket is relatively long during the switching between the heating and cooling chambers, which not only reduces testing efficiency but also increases energy consumption and significantly increases testing costs. Therefore, we propose a thermal shock testing machine for network transformer reliability inspection. Summary of the Invention

[0004] The purpose of this invention is to provide a thermal shock testing machine for network transformer reliability inspection, so as to solve the existing problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a thermal shock testing machine for network transformer reliability inspection, comprising a test chamber, a storage chamber, and a filter chamber. A heat insulation plate is fixedly installed in the middle of the interior of the test chamber. The interior of the test chamber is divided into a cooling chamber and a heating chamber by the heat insulation plate. A through-hole is formed in the middle of the heat insulation plate. Large-diameter baffles are formed at the top and bottom of the through-hole. Grooves are formed around the perimeter of the baffles. A storage chamber with through holes on its outer perimeter is slidably disposed inside the through-hole. Sealing plates are fixedly installed at the top and bottom of the storage chamber. The sealing plate is equipped with sealing gaskets corresponding to the grooves on all four sides of the side connected to the storage box. A filter box is fixed on the top of the test chamber. A fan is installed on the outer side of one end of the filter box and is sealed to its interior. The filter box contains multiple layers of filter plates and an activated carbon adsorption layer. A telescopic tube is installed at the bottom of the end of the filter box away from the fan. The telescopic tube extends to the top of the storage box and is sealed to its top wall. The telescopic tube is fixed and sealed to the top of the refrigeration chamber. A heat insulation sleeve is installed on the outer periphery of the telescopic tube. A one-way valve is installed on one side of the bottom end of the telescopic tube.

[0006] Preferably, a lifting plate is fixedly connected to the bottom surface of the bottom sealing plate of the storage box. The lifting plate is placed inside the heating chamber. A screw is vertically installed around the inside of the heating chamber through a sealed bearing. The screw passes through the circumference of the lifting plate and is spirally connected to it. A drive groove is opened inside the bottom of the test chamber. A drive motor is fixedly installed at the center of the drive groove. A multi-layer sprocket is provided at the end of the output shaft of the drive motor. A transmission shaft is fixedly connected to the bottom of one end of the screw extending into the drive groove. Single-layer sprockets are arranged on the outer periphery of the multiple transmission shafts corresponding to the positions of the multi-layer sprockets. The single-layer sprockets are connected to the multi-layer sprockets of the corresponding height through a chain.

[0007] Preferably, the storage box has an opening door on one side, and the surface of the opening door also has a through hole. The bottom two sides of the opening door are movably connected to the bottom two sides of the inner wall of one end of the storage box through a pivot. A slot is provided on one side of the middle of the top of the opening door. A card plate is slidably connected to the top of the storage box near the opening door. A temperature sensor is provided on the inner top wall of the storage box.

[0008] Preferably, a refrigeration device is provided on one inner wall of the refrigeration chamber, and the refrigeration end of the refrigeration device extends into the interior of the refrigeration chamber.

[0009] Preferably, a heating device is provided on the inner wall of one side of the heating chamber, and the cooling end of the heating device extends into the interior of the heating chamber.

[0010] Preferably, the inner wall of the through groove at the center of the heat insulation plate is provided with rubber protrusions, which are in contact with the outer wall of the storage box.

[0011] Preferably, a door is movably installed on the outer side of the test chamber, and observation windows with double-layered tempered glass are opened at the top and bottom of the door, corresponding to the positions of the refrigeration chamber and the heating chamber.

[0012] Preferably, a control panel is provided on the outer side of the test chamber, and the control panel is fixedly installed on the outer side of the test chamber by means of embedding.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By installing a filter box with a fan at the top of the test chamber, room temperature air is drawn in by the fan and injected into the filter box. After being filtered and adsorbed by the filter plates and activated carbon adsorption layer, the air is introduced into the storage box through the telescopic tube. This allows the room temperature air to neutralize the high or low temperature inside the storage box and gradually approach the outside temperature, thereby improving the efficiency of cooling or heating, shortening the test time, and achieving the purpose of energy saving.

[0015] 2. By using multi-layer sprockets connected to chains and multiple single-layer sprockets, the drive motor can synchronously drive multiple transmission shafts to rotate, thereby driving multiple screws to rotate synchronously. This achieves synchronous driving of the four sides of the lifting plate, ensuring the stability of the storage box during lifting and avoiding swaying.

[0016] 3. By using baffles and their bottom sealing gaskets, along with baffle grooves and their internal grooves, a sealing purpose is achieved. The rubber protrusions in the through grooves make close contact with the unopened parts at the bottom or top of the storage box, thereby improving the sealing effect, reducing the influence between high and low temperatures, and ensuring the stability of the internal temperature of the refrigeration and heating chambers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the test chamber of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the filter box of the present invention;

[0020] Figure 4 This is a schematic diagram of the storage box structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the heat insulation panel structure of the present invention.

[0022] In the diagram: 1. Test chamber; 2. Control panel; 3. Chamber door; 4. Observation window; 5. Refrigeration chamber; 6. Refrigeration equipment; 7. Heating chamber; 8. Heating equipment; 9. Insulation plate; 10. Baffle groove; 11. Groove; 12. Rubber protrusion; 13. Storage box; 14. Opening door; 15. Slot; 16. Card plate; 17. Sealing plate; 18. Sealing gasket; 19. Lifting plate; 20. Screw; 21. Drive slot; 22. Drive motor; 23. Multi-layer sprocket; 24. Drive shaft; 25. Single-layer sprocket; 26. Fan; 27. Filter box; 28. Air filter; 29. ​​Activated carbon adsorption layer; 30. Telescopic tube; 31. Insulation sleeve. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-5 This invention provides a technical solution for a thermal shock testing machine for network transformer reliability inspection: It includes a test chamber 1, a storage box 13, and a filter box 27. A heat insulation plate 9 is fixedly installed in the middle of the interior of the test chamber 1. The interior of the test chamber 1 is divided into a cooling chamber 5 and a heating chamber 7 by the heat insulation plate 9. A through groove is formed in the middle of the heat insulation plate 9. Large-diameter baffle grooves 10 are formed at both the top and bottom of the through groove. Grooves 11 are formed around the surface of each baffle groove 10. A storage box 13 with through holes on its outer periphery is slidably disposed inside the through groove. Sealing plates 17 are fixedly installed at the top and bottom of the storage box 13. The sealing plates 17 and the storage box 1... On one side of the connection 3, sealing gaskets 18 corresponding to the groove 11 are installed around the perimeter. A filter box 27 is fixed on the top of the test chamber 1. A fan 26 is installed on the outer side of one end of the filter box 27 and is sealed to the inside. The filter box 27 is provided with multiple layers of filter sheets 28 and activated carbon adsorption layer 29 in sequence. A telescopic tube 30 is installed at the bottom of the end of the filter box 27 away from the fan 26. The telescopic tube 30 extends to the top of the storage box 13 and is sealed to the top wall. The telescopic tube 30 is fixed and sealed to the top of the refrigeration chamber 5. A heat insulation sleeve 31 is installed on the outer periphery of the telescopic tube 30. A one-way valve is installed on one side of the bottom end of the telescopic tube 30.

[0025] Specifically, a lifting plate 19 is fixedly connected to the bottom surface of the bottom sealing plate 17 of the storage box 13. The lifting plate 19 is placed inside the heating chamber 7. A screw 20 is vertically installed around the inside of the heating chamber 7 through a sealed bearing. The screw 20 passes through the circumference of the lifting plate 19 and is spirally connected to it. A drive groove 21 is opened inside the bottom of the test chamber 1. A drive motor 22 is fixedly installed at the center of the drive groove 21. A multi-layer sprocket 23 is provided at the end of the output shaft of the drive motor 22. A transmission shaft 24 is fixedly connected to the bottom of one end of the screw 20 that extends into the drive groove 21. A single-layer sprocket 25 is set on the outer periphery of the multiple transmission shafts 24 corresponding to the position of the multi-layer sprocket 23. The single-layer sprocket 25 is connected to the multi-layer sprocket 23 of the corresponding height through a chain.

[0026] Specifically, a door 14 is provided on one side of the storage box 13, and a through hole is provided on the surface of the door 14. The bottom two sides of the door 14 are movably connected to the bottom two sides of the inner wall of one end of the storage box 13 via a pivot. A slot 15 is provided on one side of the middle of the top of the door 14. A card plate 16 is slidably connected to the top of the storage box 13 near the door 14. A temperature sensor is provided on the inner top wall of the storage box 13.

[0027] Specifically, a refrigeration device 6 is installed on one inner wall of the refrigeration chamber 5, and the refrigeration end of the refrigeration device 6 extends into the interior of the refrigeration chamber 5.

[0028] Specifically, a heating device 8 is installed on one inner wall of the heating chamber 7, and the cooling end of the heating device 8 extends into the interior of the heating chamber 7.

[0029] Specifically, rubber protrusions 12 are provided around the inner wall of the through groove opened at the center of the heat insulation plate 9, and the rubber protrusions 12 are in contact with the outer wall of the storage box 13.

[0030] Specifically, a door 3 is movably installed on the outer side of the test chamber 1. The top and bottom of the door 3 are provided with observation windows 4 with double-layered tempered glass embedded in the glass, corresponding to the positions of the cooling chamber 5 and the heating chamber 7.

[0031] Specifically, a control panel 2 is provided on the outer side of the test chamber 1. The control panel 2 is fixedly installed on the outer side of the test chamber 1 by means of embedding.

[0032] In this implementation scheme, during use, after opening the box door 3, the card plate 16 is moved upward to disengage from the card slot 15. Then, the opening and closing door 14 is opened, and the network transformer to be tested is placed inside the storage box 13. Then, the opening and closing door 14 is closed, and the card plate 16 is moved downward to engage with the card slot 15. Finally, the box door 3 is closed, and the storage box 13 is subjected to low-temperature or high-temperature impact using the refrigeration equipment 6 in the refrigeration chamber 5 or the heating equipment 8 in the heating chamber 7. After completion, when it is necessary to raise or lower the storage box 13, ambient temperature air is first drawn from the outside by the fan 26 and injected into the filter box 27. The filter plates 28 and activated carbon adsorption layer 29 inside the filter box 27 filter and adsorb the ambient temperature air to remove impurities. Then, the air is introduced into the storage box 13 through the telescopic tube 30, so that the ambient temperature air is neutralized with the high or low temperature inside the storage box 13. When the temperature inside the storage box 13 approaches the outside temperature, the multi-layer sprocket 23 is driven to rotate by the drive motor 22, in conjunction with... The chain drives multiple single-layer sprockets 25, thereby cooperating with the drive shaft 24 to drive multiple screws 20 to rotate synchronously. Combined with the lifting plate 19 connected to the spiral, it drives the storage box 13 to rise and fall, facilitating switching between the cooling chamber 5 and the heating chamber 7. Then, the fan 26 is turned off, and a one-way valve prevents temperature backflow. A high-temperature or low-temperature impact test is then performed. Because the temperature inside the storage box 13 is neutralized externally, the efficiency during cooling or heating is greatly improved, thus shortening the test time and achieving energy saving. The sealing plate 17 and its bottom sealing gasket 18, along with the baffle groove 10 and its internal groove 11, achieve a sealing effect. The rubber protrusions 12 in the through groove make close contact with the unopened bottom or top of the storage box 13, improving the sealing effect, reducing the influence of high and low temperatures, and ensuring the stability of the internal temperature of the cooling chamber 5 and the heating chamber 7.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermal shock testing machine for network transformer reliability inspection, comprising a test chamber (1), a storage box (13), and a filter box (27), characterized in that: A heat insulation plate (9) is fixedly installed in the middle of the interior of the test chamber (1). The interior of the test chamber (1) is divided into a cooling chamber (5) and a heating chamber (7) by the heat insulation plate (9). A through groove is opened in the middle of the heat insulation plate (9). A baffle groove (10) with a large diameter is opened at the top and bottom of the through groove. A groove (11) is opened around the surface of the baffle groove (10). A storage box (13) with a through hole on the outer periphery is slidably installed inside the through groove. A sealing plate (17) is fixedly installed at the top and bottom of the storage box (13). A sealing gasket (18) corresponding to the groove (11) is installed around the side of the sealing plate (17) that is connected to the storage box (13). The test chamber (1) is fixed with a filter box (27) at the top. A fan (26) is provided on the outer side of one end of the filter box (27) and is sealed to the inside. The filter box (27) is provided with multiple layers of air filter sheets (28) and activated carbon adsorption layer (29) in sequence. A telescopic tube (30) is provided at the bottom of the end of the filter box (27) away from the fan (26). The telescopic tube (30) extends to the top of the storage box (13) and is sealed to the top wall. The telescopic tube (30) is fixed and sealed to the top of the refrigeration chamber (5). A heat insulation sleeve (31) is provided on the outer periphery of the telescopic tube (30). A one-way valve is provided on one side of the bottom end of the telescopic tube (30).

2. The thermal shock testing machine for network transformer reliability inspection according to claim 1, characterized in that: A lifting plate (19) is fixedly connected to the bottom surface of the bottom sealing plate (17) of the storage box (13). The lifting plate (19) is placed inside the heating chamber (7). A screw (20) is vertically installed around the inside of the heating chamber (7) through a sealed bearing. The screw (20) passes through the circumference of the lifting plate (19) and is spirally connected to it. A drive groove (21) is opened inside the bottom of the test box (1). A drive motor (22) is fixedly installed at the center of the drive groove (21). A multi-layer sprocket (23) is provided at the end of the output shaft of the drive motor (22). A transmission shaft (24) is fixedly connected to the bottom of one end of the screw (20) that extends into the drive groove (21). A single-layer sprocket (25) is set on the outer periphery of the multiple transmission shafts (24) corresponding to the position of the multi-layer sprocket (23). The single-layer sprocket (25) is connected to the multi-layer sprocket (23) of the corresponding height through a chain.

3. The thermal shock testing machine for network transformer reliability inspection according to claim 1, characterized in that: The storage box (13) has an opening door (14) on one side, and the surface of the opening door (14) also has a through hole. The bottom two sides of the opening door (14) are movably connected to the bottom two sides of the inner wall of one end of the storage box (13) through a pivot. A slot (15) is provided on one side of the middle of the top of the opening door (14). A card plate (16) is slidably connected to the top of the storage box (13) near the opening door (14). A temperature sensor is provided on the inner top wall of the storage box (13).

4. A thermal shock testing machine for network transformer reliability inspection according to claim 1, characterized in that: A refrigeration device (6) is provided on the inner wall of one side of the refrigeration chamber (5), and the refrigeration end of the refrigeration device (6) extends into the interior of the refrigeration chamber (5).

5. A thermal shock testing machine for network transformer reliability inspection according to claim 1, characterized in that: A heating device (8) is provided on one inner wall of the heating chamber (7), and the cooling end of the heating device (8) extends into the interior of the heating chamber (7).

6. A thermal shock testing machine for network transformer reliability inspection according to claim 1, characterized in that: Rubber protrusions (12) are provided around the inner wall of the through groove opened at the center of the heat insulation plate (9), and the rubber protrusions (12) are in contact with the outer wall of the storage box (13).

7. A thermal shock testing machine for network transformer reliability inspection according to claim 1, characterized in that: The test chamber (1) has a door (3) installed on its outer side. The top and bottom of the door (3) are provided with observation windows (4) with double-layered tempered glass embedded in the glass, corresponding to the positions of the refrigeration chamber (5) and the heating chamber (7).

8. A thermal shock testing machine for network transformer reliability inspection according to claim 1, characterized in that: A control panel (2) is provided on the outer side of the test chamber (1), and the control panel (2) is fixedly installed on the outer side of the test chamber (1) by means of embedding.

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