A main transformer bushing end screen drying device

Abstract

This invention discloses a drying device for the end screen of a main transformer bushing, comprising: an injection component and a drying component; the drying component includes: a detachable movable buckle sleeved on the end screen of the main transformer bushing; a base connected to the movable buckle; and a detachable sealing sleeve connected to the base for providing a gas passage, the sealing sleeve having an interface connected to the gas passage; wherein: the sealing sleeve is fastened to the outer periphery of the end screen of the main transformer bushing by the base and the movable buckle, the injection component is inserted into the interface, and the drying component provides drying gas to the outer periphery of the end screen of the bushing exposed to air, thereby forming a gas isolation zone on the outer periphery of the end screen of the main transformer bushing. The drying device for the end screen of the main transformer bushing of this invention can provide a relatively dry and sealed testing environment for the end screen of the main transformer bushing, reducing the probability of the end screen becoming damp; the structure is reasonable and helps control costs.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a main transformer bushing end screen drying device. Background Technology

[0002] In existing technologies, transformer bushing defects leading to main transformer failures constitute a significant proportion of all equipment defects and malfunctions reported over the years. Therefore, accurately assessing the condition of the main transformer bushing is of paramount importance in the field of power equipment testing. In the structural analysis of main transformer bushings, the bushing's end screen needs to be reliably grounded during operation and disconnected during testing. However, under the influence of the hot and humid climate in southern regions, the bushing's end screen exposed to air is prone to moisture absorption. Once the end screen becomes damp, its insulation performance is affected. If the sealing performance of the end screen is compromised, moisture can enter the main bushing along the end screen, further affecting the bushing's insulation performance and potentially leading to transformer failure.

[0003] According to the "Power Equipment Maintenance and Testing Procedures Q / CSG1 206007-2017", routine pre-testing requires measuring the insulation resistance and dielectric loss capacitance of the main transformer's capacitive bushings, and there are also corresponding requirements for the bushing end screen. However, under the influence of the hot and humid climate in the south, the insulation of the end screen may be lower than the required value in the procedure during field testing, which affects the judgment of the test results. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a main transformer bushing end screen drying device, which can provide a relatively dry and sealed test environment for the main transformer bushing end screen, reduce the probability of the end screen getting damp; the structure is reasonable and it is conducive to cost control.

[0005] To address the aforementioned technical problems, this invention provides a main transformer bushing end screen drying device, comprising: an injection component for providing drying gas, and a detachable drying component fitted around the outer periphery of the main transformer bushing end screen to form a gas-isolated environment around the end screen, wherein the injection component and the drying component are adapted to each other; the drying component includes: a detachable movable buckle fitted onto the main transformer bushing end screen; a base connected to the movable buckle; and a detachable sealing sleeve connected to the base for providing a gas passage, the sealing sleeve having an interface connected to the gas passage; wherein: the sealing sleeve provides a gas passage. The sleeve is secured to the outer periphery of the main transformer bushing end screen via a base and movable clips. The injection component is plugged into the interface and provides dry gas to the outer periphery of the bushing end screen exposed to air through the drying component, thereby forming a gas isolation zone on the outer periphery of the main transformer bushing end screen. The sealing sleeve is made of waterproof soft material and is detachably connected to the base. Multiple magnets are installed on one side of the sealing sleeve, and the sealing sleeve is attracted to the base by multiple magnets. A gap is left at the position where the sealing sleeve connects to the base to cooperate with the air passage of the sealing sleeve to form a shielded air passage on the outer periphery of the main transformer bushing end screen.

[0006] The movable buckle is made of soft material and is tightened and fitted onto the outside of the end screen of the sleeve.

[0007] One side of the movable buckle has an opening for fitting and connecting with the base, and the base is detachably connected to this opening.

[0008] A temperature and humidity probe is inserted through an interface to obtain the temperature and humidity of the air inside the sealed sleeve.

[0009] Among them, a fall-prevention rope is installed on the sealing sleeve.

[0010] The base is made of a soft material to accommodate the surface shape of the main transformer bushing.

[0011] The injection component includes: an air cylinder, a conduit connected to the air cylinder, and a gas inlet connected to the conduit, the structure of which is compatible with the structure of the interface.

[0012] The main transformer bushing end screen drying device of the present invention has the following beneficial effects: The main transformer bushing end screen drying device includes: an injection component for providing drying gas, and a drying component detachably fitted around the outer periphery of the main transformer bushing end screen to form a gas isolation environment around the end screen, the injection component and the drying component being compatible; the drying component includes: a movable buckle detachably fitted onto the main transformer bushing end screen; a base connected to the movable buckle; and a sealing sleeve detachably connected to the base for providing a gas passage, the sealing sleeve having an interface connected to the gas passage; wherein: the sealing sleeve is fastened to the outer periphery of the main transformer bushing end screen by the base and the movable buckle, the injection component is inserted into the interface, and the drying component provides drying gas to the bushing end screen exposed to air, thereby forming a gas isolation area around the outer periphery of the main transformer bushing end screen, which can provide a relatively dry and sealed test environment for the main transformer bushing end screen, reducing the probability of the end screen getting damp; the structure is reasonable and helps to control costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the main transformer bushing end screen drying device according to an embodiment of the present invention. Detailed Implementation

[0015] 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.

[0016] like Figure 1 The image shows an embodiment of the main transformer bushing end screen drying device of the present invention.

[0017] In this embodiment, the main transformer bushing end screen drying device can replace the crude drying method of directly drying the end screen using a hot air blower, greatly reducing the operational risk of blowing moisture into the end screen, improving the accuracy of testing and detection, reducing the risk of misjudgment, and significantly improving work efficiency. It includes: an injection component 1 for providing drying gas, and a detachable drying component 2 that is sleeved around the outer periphery of the main transformer bushing end screen T to form a gas-isolated environment around the end screen; the drying component 2 includes: a detachable movable buckle 21 sleeved on the main transformer bushing end screen T; a base 22 connected to the movable buckle 21; and a detachable sealing sleeve 23 connected to the base 22 to provide a gas passage, the sealing sleeve 23 having an interface 231 connected to the gas passage.

[0018] Wherein: the sealing sleeve 23 is fastened to the outer periphery of the main transformer bushing end screen T by the base 22 and the movable buckle 21, the injection component 1 is inserted into the interface 231, and the drying component 2 provides dry gas to the outer periphery of the bushing end screen T exposed to air, so as to form a gas isolation zone on the outer periphery of the main transformer bushing end screen T.

[0019] In specific implementation, the injection component 1 includes: an air cylinder 11, a conduit 12 connected to the air cylinder 11, and a gas inlet 13 connected to the conduit 12. The structure of the gas inlet 13 is adapted to the structure of the interface 231.

[0020] Furthermore, the function of the drying component 2 is to provide dry gas to the outer periphery of the bushing end screen T exposed to air by designing an assembly and fixing structure that is compatible with the main transformer bushing end screen T and a docking structure that is compatible with the injection component 1.

[0021] The drying assembly 2 includes a movable clip 21, a base 22, and a sealing sleeve 23. The movable clip 21 is made of a soft material and, during implementation, can be tightened to fit over the outside of the end screen T of the sleeve. One side of the movable clip 21 has an opening for fitting and connecting with the base 22, and the base 22 is detachably connected to this opening.

[0022] The function of the base 22 is to connect with the movable snap-fit ​​21 and the sealing sleeve 23 respectively. The base 22 is made of soft material to adapt to the surface shape of the main transformer bushing T.

[0023] In this embodiment, the movable buckle 21 and the base 22 are located on the outer periphery of the protruding joint T1 of the end screen T of the main transformer bushing. Through the structural setting of the shape and assembly position of the movable buckle 21 and the base 22, a certain gas guiding effect is formed during the process of the injection component 1 receiving the drying gas provided by the drying component 2.

[0024] Furthermore, the sealing sleeve 23 is made of waterproof soft material and is detachably connected to the base 22. The sealing sleeve 23 has an air passage inside and an interface 231 connected to the air passage.

[0025] In addition, multiple magnets are installed on one side of the sealing sleeve 23, and the sealing sleeve 23 can be detachably attached to the base 22 by the attraction of the multiple magnets. The magnets also facilitate docking between the sealing sleeve 23 and the base 22.

[0026] Preferably, a fall-prevention lanyard can be installed on the sealing sleeve 23. This can prevent the sleeve from falling off due to insufficient magnetic attraction when the injected air flow is too large, or due to the weight of the air injection pipe.

[0027] During implementation, a gap is left at the junction of the sealing sleeve 23 and the base 22 to allow the air passage of the sealing sleeve 23 to form a shielded air passage on the outer periphery of the main transformer bushing end screen T. It is understood that this gap can also be a small hole, as long as it allows air inside the sealing sleeve 23 to flow out.

[0028] Preferably, a temperature and humidity probe can also be inserted through interface 231 to obtain the temperature and humidity of the air inside the sealing sleeve 23.

[0029] In this embodiment, when the main transformer bushing end screen drying device is implemented, the sealing sleeve 23 is fastened to the outer periphery of the main transformer bushing end screen T by the base 22 and the movable buckle 21 during the bushing insulation test. Due to the design of the assembly structure between the movable buckle 21 and the base 22, and the design of the assembly structure between the base 22 and the sealing sleeve 23, the main transformer bushing end screen drying device in this embodiment can provide a relatively sealed environment for the end screen for different types of bushing structures from different manufacturers, and use dry air to dry the exposed end screen, thereby improving the accuracy of the measurement, reducing the probability of the end screen getting damp, and ensuring the insulation performance of the main transformer bushing.

[0030] In other embodiments of the main transformer bushing end screen drying device in this example, a dehumidifier can be used to replace the injection component 1. The dehumidifier forms a gas isolation zone on the outer periphery of the main transformer bushing end screen T through the air passage formed by the aforementioned movable buckle 21, base 22, and sealing sleeve 23. This device can also be applied to other occasions requiring localized drying operations, such as surface drying of support porcelain insulators and surge arrester drying.

[0031] The main transformer bushing end screen drying device of the present invention has the following beneficial effects: The main transformer bushing end screen drying device includes: an injection component for providing drying gas, and a drying component detachably fitted around the outer periphery of the main transformer bushing end screen to form a gas isolation environment around the end screen, the injection component and the drying component being compatible; the drying component includes: a movable buckle detachably fitted onto the main transformer bushing end screen; a base connected to the movable buckle; and a sealing sleeve detachably connected to the base for providing a gas passage, the sealing sleeve having an interface connected to the gas passage; wherein: the sealing sleeve is fastened to the outer periphery of the main transformer bushing end screen by the base and the movable buckle, the injection component is inserted into the interface, and the drying component provides drying gas to the bushing end screen exposed to air, thereby forming a gas isolation area around the outer periphery of the main transformer bushing end screen, which can provide a relatively dry and sealed test environment for the main transformer bushing end screen, reducing the probability of the end screen getting damp; the structure is reasonable and helps to control costs.

Claims

1. A main transformer bushing end-screen drying device, characterized in that, include: An injection assembly for providing dry gas, and a detachable drying assembly fitted around the outer periphery of the main transformer bushing end screen to create a gas-isolated environment around the bushing end screen, wherein the injection assembly is adapted to the drying assembly; the drying assembly includes: A detachable movable clip that fits onto the end screen of the main transformer bushing; The base connected to the movable buckle; and A detachable sealing sleeve connected to the base for providing an air passage, the sealing sleeve having an interface for connecting with the air passage; wherein: The sealing sleeve is fastened to the outer periphery of the main transformer bushing end screen by the base and the movable buckle. The injection component is inserted into the interface and provides dry gas to the outer periphery of the bushing end screen exposed to air through the drying component, so as to form a gas isolation zone on the outer periphery of the main transformer bushing end screen. The sealing sleeve is made of waterproof soft material and is detachably connected to the base. Multiple magnets are installed on one side of the sealing sleeve, and the sealing sleeve is attracted to the base by the multiple magnets. A gap is left at the position where the sealing sleeve connects to the base to cooperate with the air passage of the sealing sleeve to form a shielded air passage on the outer periphery of the end screen of the main transformer bushing.

2. The main transformer bushing end screen drying device as described in claim 1, characterized in that, The movable buckle is made of a soft material and is tightened and fitted onto the outside of the end screen of the sleeve.

3. The main transformer bushing end screen drying device as described in claim 2, characterized in that, The movable buckle has an opening on one side for fitting and connecting with the base, and the base is detachably connected to the opening.

4. The main transformer bushing end screen drying device as described in claim 1, characterized in that, A temperature and humidity probe is inserted through the interface to obtain the temperature and humidity of the air inside the sealed sleeve.

5. The main transformer bushing end screen drying device as described in claim 1, characterized in that, A fall-prevention rope is installed on the sealing sleeve.

6. The main transformer bushing end screen drying device as described in claim 1, characterized in that, The base is made of a soft material to accommodate the surface shape of the main transformer bushing.

7. The main transformer bushing end screen drying device as described in claim 1, characterized in that, The injection assembly includes: an air cylinder, a conduit connected to the air cylinder, and a gas inlet connected to the conduit, wherein the structure of the gas inlet is adapted to the structure of the interface.

Images