Flange type non-return device
By using the modular design and sealing structure of the flange-type check device, the problems of large size, heavy weight and poor sealing caused by the redundancy of transformer valve structure are solved, realizing quick disassembly and zero leakage, and improving the space utilization and maintenance efficiency of the equipment.
Patent Information
- Application Number
- CN202520584216.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-03-28
AI Technical Summary
The redundant design of traditional transformer valve structures results in large size and heavy weight, low installation space utilization, welding processes requiring specialized equipment, high maintenance costs, and sealing structures prone to leakage under temperature fluctuations.
Design a flange-type check device with a modular assembly structure, bolted connection, and a 60° beveled valve core and O-ring seal to achieve quick disassembly and sealing, and adapt to temperature changes.
It achieves a reduction in device size and weight, a 300% increase in maintenance efficiency, and zero leakage within a temperature range of -30℃ to 100℃, thereby improving the application efficiency of the equipment.
Smart Images
Figure CN223768184U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of transformer technology, and in particular to a flange-type check device for transformers. Background Technology
[0002] Traditional transformer valve structures suffer from bulky size and excessive weight due to redundant design, resulting in less than 60% space utilization in installation. The welded, integral molding process requires specialized equipment for production and maintenance, leading to difficult quality control, high costs, and low efficiency. Conventional sealing structures and materials exhibit high leakage rates under conditions of drastic temperature fluctuations. These technical drawbacks severely restrict the equipment's effectiveness in real-world applications. Utility Model Content
[0003] The purpose of this application is to provide a flange-type check device that is simple in structure, easy to use, can quickly realize unidirectional air intake in transformers, and is not prone to oil leakage.
[0004] To achieve the above objectives, this utility model provides a flange-type check device, including a flange and a check mechanism connected to the flange. The flange includes a front flange and a rear flange, with channels penetrating both ends of the front and rear flanges respectively. The front and rear flanges are detachable via screws. The check mechanism is installed between the front and rear flanges and includes a valve body, a valve core, a guide plate, a spring, and a cover plate. The valve body is fixed between the front and rear flanges, and a check cavity is opened in the center of the valve body, connecting the channels of the front and rear flanges respectively. The cover plate covers the end face of the valve body near the rear flange, and a through hole is opened in the center of the cover plate, connecting the rear flange channel and the check cavity. The guide plate is disposed in the check cavity, with one end of the guide plate abutting against the inner end face of the cover plate. The guide plate has a guide hole in its center. One end of the valve core is slidably connected to the guide hole, and the other end of the valve core can block the end of the check cavity that connects to the front flange channel. The valve core and the guide plate are elastically connected by a spring.
[0005] To facilitate the assembly and disassembly of the flange and the check mechanism, the screw passes through the front flange, valve body and rear flange respectively, and both ends of the screw are locked with nuts.
[0006] To ensure the sealing between the valve body and the flange, gaskets are press-fitted between the two end faces of the valve body and the inner end faces of the front and rear flanges, respectively, and the gaskets have through holes in the center.
[0007] To further ensure the sealing between the valve body and the gasket, an annular groove is provided on the end face of the valve body near the rear flange. The cover plate is fixed in the annular groove by several countersunk screws, and the outer end face of the cover plate is flush with the end face of the valve body.
[0008] To ensure a tight seal between the valve core and the valve body, the outer wall of the valve core is sealed to the inner wall of the check cavity via an O-ring.
[0009] In summary, this utility model has the following beneficial effects: by reconstructing the device structure and through the composite design of the flow channel and the 60° oblique-cut valve core, the overall size is reduced by 100% and the weight is reduced by 45%; the innovative introduction of a modular assembly structure, with the main components using bolt connections, enables disassembly and maintenance to be completed within 10 minutes, improving maintenance efficiency by 300% compared to traditional welded structures; at the same time, the 60° oblique-cut valve core, combined with hydrogenated nitrile rubber O-rings, can basically guarantee zero leakage in a temperature range of -30℃ to 100℃; the clever use of the flange structure prevents the valve core and spring from falling off; it solves the shortcomings of related technologies and improves the application efficiency of the equipment in practical scenarios. Attached Figure Description
[0010] Figure 1 This is a three-dimensional structural diagram of the flange-type check device of this utility model;
[0011] Figure 2 This is a cross-sectional view of the flange-type check device of this utility model. Detailed Implementation
[0012] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.
[0013] like Figure 1 , Figure 2 The flange-type check device shown includes a flange and a check mechanism connected to the flange.
[0014] Specifically, the flange includes a symmetrically arranged front flange 10 and a rear flange 11. The front flange 10 and the rear flange 11 are respectively provided with channels passing through their left and right ends. The front flange 10 and the rear flange 11 are detachable by a number of screws 7. The left and right ends of the screws 7 are respectively locked by nuts 12.
[0015] The check valve mechanism is installed between the front flange 10 and the rear flange 11, and includes a valve body 1, a valve core 5, a guide plate 2, a spring 3, and a cover plate 8. The valve body 1 is fixed between the front flange 10 and the rear flange 11. Each screw 7 passes through the edge of the valve body 1. Gaskets 6 are pressed between the left and right end faces of the valve body 1 and the inner end faces of the front flange 10 and the rear flange 11, respectively. Each gasket 6 has a through hole in its center. The valve body 1 has a check valve cavity in its center that connects to the channels of the front flange 10 and the rear flange 11. The cover plate 8 covers the end face of the valve body 1 near the rear flange 11 (the right end face of the valve body). An annular groove is formed on the end face of the valve body 1 near the rear flange 11. The cover plate 8 is fixed in the annular groove by several countersunk screws 9. The outer end face of the cover plate 8 is flush with the end face of the valve body 1. The center of the cover plate 8 has a through hole that connects the rear flange 11 channel and the check cavity. The diameter of the through hole is smaller than the diameter of the check cavity. The guide plate 2 is fitted inside the check cavity. One end (right end) of the guide plate 2 abuts against the inner end face of the cover plate 8. The center of the guide plate 2 has a guide hole. One end (right end) of the valve core 5 is slidably connected in the guide hole. The other end (left end) of the valve core 5 adopts a 60° oblique cut structure, which can block the end of the check cavity that connects to the front flange 10 channel (left end of the check cavity). The valve core 5 and the guide plate 2 are elastically connected by a spring 3. The outer wall of the valve core 5 is sealed to the inner wall of the check cavity by an O-ring seal 4. The O-ring seal 4 is made of hydrogenated nitrile rubber.
[0016] During installation, first install the rear flange 11 on the transformer pipeline, and pass the screw 7 through the rear flange 11 and lock it with the nut 12. Then, put the assembled check valve mechanism and gasket 6 on the screw 7 and abut it against the rear flange 11. Then install the gasket 6 and the front flange 10. Finally, lock all the components with the nut to complete the assembly.
[0017] In use, the front flange 10 is connected to the air circuit system. Protective gas enters the channel of the front flange 10. When the air pressure reaches a certain level, the valve core 5 moves to the right and the spring 3 contracts. At this time, the check chamber opens, and the protective gas can enter the transformer through the check chamber, guide plate 2, cover plate 8, and rear flange 11. Since the oil pressure in the transformer is lower than the air pressure in the air circuit, the check function is achieved.
[0018] It should be noted that, in the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0019] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, principle and application direction of this application should be covered within the scope of protection of this application.
Claims
1. A flange type check device comprising a flange and a check mechanism connected to the flange, characterized in that: The flange comprises a front flange and a rear flange, and a channel is formed through the two ends of the front flange and the rear flange at the center of the front flange and the rear flange respectively, the front flange and the rear flange are detachable through a screw rod, the non-return mechanism is installed between the front flange and the rear flange, and the non-return mechanism comprises a valve body, a valve core, a guide plate, a spring and a cover plate, the valve body is fixed between the front flange and the rear flange, a non-return cavity is formed in the center of the valve body and is communicated with the channels of the front flange and the rear flange respectively, the cover plate is covered on the end face of the valve body close to the rear flange, a through hole is formed in the center of the cover plate and is communicated with the channel of the rear flange and the non-return cavity, the guide plate is arranged in the non-return cavity, one end of the guide plate abuts against the inner end face of the cover plate, the guide plate has a guide hole at the center, one end of the valve core is slidably connected in the guide hole, the other end of the valve core can block one end of the non-return cavity communicated with the channel of the front flange, and the valve core and the guide plate are elastically connected through the spring.
2. The flange-type check device of claim 1, wherein: The screw rod penetrates the front flange, the valve body and the rear flange respectively, and the two ends of the screw rod are locked through nuts respectively.
3. The flange-type check device of claim 1, wherein: Gaskets are press-fitted between the end faces of the valve body and the inner end faces of the front flange and the rear flange respectively, and a through hole is formed in the center of the gasket.
4. The flange-type check device of claim 3, wherein: An annular groove is formed in the end face of the valve body close to the rear flange, the cover plate is fixed in the annular groove through a plurality of countersunk screws, and the outer end face of the cover plate is flush with the end face of the valve body.
5. The flange-type check device of claim 1, wherein: The outer wall of the valve core is sealingly connected with the inner wall of the non-return cavity through an O-shaped sealing ring.