A sealing structure of a load box

Abstract

The application discloses a sealing structure of a load box, comprising: a box body, opposite ends of the box body are respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are provided with waterproof and dustproof structures; the waterproof and dustproof structures comprise superposed waterproof and air-permeable filter plates and dustproof and air-permeable filter plates, and the waterproof and air-permeable filter plates and the dustproof and air-permeable filter plates are sealingly connected with the side walls of the box body. The structure can prevent dust and water vapor in the outside world from entering the inside of the load box, and avoid affecting internal elements; the heat dissipation demand and the sealing protection demand of the load box are considered, and the contradiction that a traditional sealing structure is not air-permeable when being sealed or is not sealed when being air-permeable is solved; double protection can be realized only by superposing two layers of filter plates, the structure is simple, and complex sealing components are not needed; the protection range is comprehensive, dust and water vapor are blocked at the same time, and the structure is suitable for complex environments such as high dust and high humidity.

Description

Technical Field

[0001] This application relates to the field of load cell technology, and in particular to a sealing structure for a load cell. Background Technology

[0002] A load cell is a device used for power supply testing, characterized by stable performance, comprehensive functions, high accuracy, long service life, and safe operation. Its applications are wide-ranging, covering multiple scenarios such as overall data center testing, high and low voltage generator set load testing, gas generator set testing, UPS power supply testing, and battery discharge testing.

[0003] As the core component for testing power supplies, generators, and other equipment, the load cell is sealed to protect critical internal components such as resistive elements, electrical control units, and wiring terminals, preventing environmental factors from causing malfunctions, performance degradation, or safety risks. When the load cell is used in dusty environments such as mines, construction sites, cement plants, and flour mills, or in high-humidity environments such as near the sea, during rainy seasons, or in seafood processing workshops, a sealed structure is required at the points where the load cell connects to the outside environment to prevent external dust and moisture from affecting the internal components. Utility Model Content

[0004] The main purpose of this application is to propose a sealing structure for a load cell, which aims to prevent external dust, moisture, and other factors from affecting the internal components of the load cell.

[0005] To achieve the above objectives, the sealing structure of the load cell proposed in this application includes: a cell body, wherein an air inlet and an air outlet are respectively provided at opposite ends of the cell body, and both the air inlet and the air outlet are provided with waterproof and dustproof structures; The waterproof and dustproof structure includes a waterproof and breathable filter plate and a dustproof and breathable filter plate stacked on top of each other, and the waterproof and breathable filter plate and the dustproof and breathable filter plate are sealed to the side walls of the box body on all four sides.

[0006] Optionally, the dustproof and breathable filter plate is disposed on the outside of the waterproof and breathable filter plate.

[0007] Optionally, the waterproof and breathable filter plate includes a waterproof filter plate and a first sealing frame fixed on the outside, and the dustproof and breathable filter plate includes a dustproof filter plate and a second sealing frame fixed on the outside. The first sealing frame and the second sealing frame are sealed to the side wall of the box by fasteners.

[0008] Optionally, both the air inlet and the air outlet are provided with outwardly opening flared mouths, the outer side of the first sealing frame is provided with a first inclined surface parallel to the side of the flared mouth, and the outer side of the second sealing frame is provided with a second inclined surface parallel to the side of the flared mouth, with the first inclined surface and the second inclined surface both closely attached to the inclined surface of the flared mouth.

[0009] Optionally, the fastener is a plurality of evenly spaced hexagon socket screws, which penetrate the second sealing frame and the first sealing frame and are threaded to the side wall of the housing.

[0010] Optionally, a sealing washer is provided between the contact surface of the hex socket screw and the second sealing frame.

[0011] Optionally, an annular first sealing groove is formed between the inner side of the first sealing frame and the side wall of the box, and between the contact surface of the second sealing frame and the first sealing frame, and an annular sealing element is provided in the first sealing groove.

[0012] Optionally, an annular second sealing groove is formed between the first inclined surface and the inclined surface of the flared opening, and between the second inclined surface and the inclined surface of the flared opening, and an annular sealing element is provided in the second sealing groove.

[0013] Optionally, the cross-sections of the first sealing groove and the second sealing groove are both elliptical, the cross-section of the sealing element is annular, and X-shaped ribs are provided on the inner side of the sealing element.

[0014] Optionally, the waterproof filter plate is a structure made of any one of the following materials: expanded polytetrafluoroethylene membrane, all-adhesive paper composite filter material, and sintered hydrophobic plastic plate; The dustproof filter plate is a structure made of any one of the following materials: synthetic fiber filter material, glass fiber filter material, metal porous filter material, paper filter material, or composite filter material.

[0015] This application's technical solution involves setting up a housing with an air inlet and an air outlet at opposite ends. Both the air inlet and outlet are equipped with waterproof and dustproof structures. These structures include stacked waterproof and breathable filter plates and dustproof and breathable filter plates, both of which are sealed to the side walls of the housing. Air enters through the air inlet, passes through the two layers of filter plates in the waterproof and dustproof structure, enters the housing to dissipate heat for the load components, and then exits through the waterproof and dustproof structure at the air outlet. Simultaneously, the filter plates are sealed to the side walls of the housing to prevent dust and moisture from seeping in through gaps. This structure can prevent external dust and moisture from entering the load cell, avoiding damage to internal components; it balances the heat dissipation and sealing protection requirements of the load cell, resolving the contradiction of traditional sealing structures where sealing is not breathable and breathability is not breathable; it achieves dual protection with just two layers of filter plates, with a simple structure that does not require complex sealing components; it provides comprehensive protection, blocking both dust and moisture, and is suitable for complex environments with high dust and high humidity. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the sealing structure of the load cell in this application; Figure 2 The sealing structure of the load cell in this application Figure 1 Enlarged schematic diagram of the local structure at point A; Figure 3 This is a schematic diagram of the cross-sectional structure of the seal in the sealing structure of the load box of this application.

[0018] Explanation of icon numbers: 1. Housing; 101. Air inlet; 102. Air outlet; 103. Flare; 2. Waterproof and dustproof structure; 210. Waterproof and breathable filter plate; 211. Waterproof filter plate; 212. First sealing frame; 220. Dustproof and breathable filter plate; 221. Dustproof filter plate; 222. Second sealing frame; 3. Fasteners; 4. Sealing gaskets; 5. First sealing groove; 6. Second sealing groove; 7. Sealing element; 701. Rib.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0024] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0025] As the core component for testing power supplies, generators, and other equipment, the load cell is sealed to protect critical internal components such as resistive elements, electrical control units, and terminals, preventing environmental factors from causing malfunctions, performance degradation, or safety risks. When the load cell is used in dusty environments such as mines, construction sites, cement plants, and flour mills, or in high-humidity environments such as near the sea, during the rainy season, or in seafood processing workshops, a sealed structure is required at the points where the load cell communicates with the outside environment to prevent external dust and moisture from affecting the internal components.

[0026] In view of this, this application proposes a sealing structure for a load cell.

[0027] In the embodiments of this application, reference is made to Figures 1 to 3The sealing structure of the load box mentioned above includes: a box body 1, with an air inlet 101 and an air outlet 102 respectively provided at opposite ends of the box body 1, and both the air inlet 101 and the air outlet 102 are provided with a waterproof and dustproof structure 2. The waterproof and dustproof structure 2 includes a waterproof and breathable filter plate 210 and a dustproof and breathable filter plate 220 stacked together. The waterproof and breathable filter plate 210 and the dustproof and breathable filter plate 220 are sealed to the side wall of the box body 1 on all four sides.

[0028] Specifically, air enters through the air inlet 101 of the housing 1, passes through the two layers of filter plates in the waterproof and dustproof structure 2, enters the housing 1 to dissipate heat for the load components, and then exits through the waterproof and dustproof structure 2 at the air outlet 102. Simultaneously, the filter plates are sealed to the side walls of the housing 1 to prevent dust and moisture from seeping in through gaps. By stacking the waterproof and breathable filter plate 210 and the dustproof and breathable filter plate 220, dual interception of dust and moisture is achieved without obstructing airflow, thus ensuring heat dissipation. The filter plates are sealed to the side walls of the housing 1, sealing edge gaps and preventing pollutants from seeping in around the filter plates. The two layers of filter plates perform their respective functions, working together to achieve dual protection.

[0029] In this embodiment, the dustproof and breathable filter plate 220 is disposed on the outside of the waterproof and breathable filter plate 210. Following the protection logic of "coarse filtration first, then fine protection": the outer dustproof plate first intercepts large particles of dust and impurities, preventing them from clogging the micropores of the inner waterproof plate, and ensuring the long-term stable use of the waterproof plate's breathability and waterproof performance.

[0030] In this embodiment, the waterproof and breathable filter plate 210 includes a waterproof filter plate 211 and a first sealing frame 212 fixed on the outside, and the dustproof and breathable filter plate 220 includes a dustproof filter plate 221 and a second sealing frame 222 fixed on the outside. The first sealing frame 212 and the second sealing frame 222 are sealed to the side wall of the housing 1 by fasteners 3. The sealing frame provides rigid support for the filter plate, preventing the filter plate from deforming due to airflow impact or vibration, and ensuring the stability of the filtration area; the frame is connected to the housing 1 by fasteners 3, which enhances the connection firmness and improves the sealing reliability.

[0031] In this embodiment, both the air inlet 101 and the air outlet 102 are provided with outwardly flared openings 103. The outer side of the first sealing frame 212 is provided with a first inclined surface parallel to the side of the flared opening 103, and the outer side of the second sealing frame 222 is provided with a second inclined surface parallel to the side of the flared opening 103. Both the first and second inclined surfaces are tightly attached to the inclined surfaces of the flared opening 103. The inclined surfaces of the frames are parallel and tightly attached to the side of the flared opening 103, forming a surface contact seal. Compared to planar contact, this provides a larger contact area and a tighter seal.

[0032] In this embodiment, the fastener 3 consists of multiple evenly spaced hexagonal socket head cap screws that penetrate the second sealing frame 222 and the first sealing frame 212 and are threadedly connected to the side wall of the housing 1. The evenly distributed screws ensure balanced force distribution between the sealing frame and the housing 1, preventing frame deformation or sealing gaps caused by excessive local stress. The threaded connection has self-locking properties, enhancing the structure's vibration resistance and making it suitable for use in mobile or outdoor environments.

[0033] In this embodiment, a sealing washer 4 is provided between the contact surface of the hex socket screw and the second sealing frame 222. Utilizing the elastic deformation characteristics of the sealing washer 4, under the action of the screw preload, the sealing washer 4 completely fills the tiny gaps in the contact surface, preventing dust and moisture from seeping in through the screw hole, thus achieving a local seal at the fastener 3. This seals the screw hole, a leak point that is easily overlooked, forming an all-around seal and improving the overall sealing level.

[0034] In this embodiment, annular first sealing grooves 5 are formed between the inner side of the first sealing frame 212 and the side wall of the housing 1, and between the contact surfaces of the second sealing frame 222 and the first sealing frame 212. Annular sealing elements 7 are provided in the first sealing grooves 5. When the sealing frames are installed, the contact surfaces of the inner side of the first sealing frame 212 and the side wall of the housing 1, and the contact surfaces of the second sealing frame 222 and the first sealing frame 212, are all fitted together by the sealing elements 7 in the sealing grooves. Under the action of pre-tightening force, the sealing elements 7 undergo elastic deformation, filling the tiny gaps in the contact surfaces. The sealing grooves provide positioning for the sealing elements 7, preventing the sealing elements 7 from shifting during installation or use, and ensuring the effectiveness of the seal. The elastic deformation of the sealing elements 7 achieves surface contact sealing, which is more reliable than simple rigid fitting and adapts to the tiny displacement of the contact surfaces caused by temperature changes or vibration.

[0035] In this embodiment, an annular second sealing groove 6 is formed between the first inclined surface and the inclined surface of the flared opening 103, and between the second inclined surface and the inclined surface of the flared opening 103. An annular sealing element 7 is provided in the second sealing groove 6. When the inclined surface of the sealing frame is in contact with the inclined surface of the flared opening 103, the sealing element 7 in the second sealing groove 6 is compressed and deformed, filling the gap between the inclined surfaces and achieving a seal on the contact surface of the inclined surfaces. The sealing range is extended to the contact area of ​​the inclined surfaces. By utilizing the guiding property of the inclined surface contact, the sealing element 7 is uniformly deformed under the action of pre-tightening force, ensuring a full-area seal on the inclined surfaces without any local gaps.

[0036] In this embodiment, the first sealing groove 5 and the second sealing groove 6 both have elliptical cross-sections, and the sealing element 7 has an annular cross-section. Furthermore, an X-shaped rib 701 is provided on the inner side of the sealing element 7. The sealing element 7 is installed within the elliptical sealing groove. When compressed, the X-shaped rib 701 enhances the resilience of the sealing element 7, ensuring complete contact between the sealing element 7 and the elliptical groove wall, filling all gaps. Simultaneously, the X-shaped rib 701 improves the compressive strength of the sealing element 7, enhancing its structural strength and preventing long-term compression deformation.

[0037] In this embodiment, the waterproof filter plate 211 is a structure made of any one of the following materials: expanded polytetrafluoroethylene membrane, all-adhesive paper composite filter material, or sintered hydrophobic plastic plate; the dustproof filter plate 221 is a structure made of any one of the following materials: synthetic fiber filter material, glass fiber filter material, porous metal filter material, paper filter material, or composite filter material. Based on the operating environment of the load cell, corresponding waterproof and dustproof filter materials are selected, utilizing the characteristics of different materials to adapt to environmental requirements: the waterproof filter material blocks water vapor through hydrophobic micropores or a hydrophobic coating, while the dustproof filter material intercepts dust through fiber pores or a porous structure. The material selection precisely matches the environmental requirements, ensuring effective protection.

[0038] This application's technical solution involves setting up a housing with an air inlet and an air outlet at opposite ends. Both the air inlet and outlet are equipped with waterproof and dustproof structures. These structures include stacked waterproof and breathable filter plates and dustproof and breathable filter plates, both of which are sealed to the side walls of the housing. Air enters through the air inlet, passes through the two layers of filter plates in the waterproof and dustproof structure, enters the housing to dissipate heat for the load components, and then exits through the waterproof and dustproof structure at the air outlet. Simultaneously, the filter plates are sealed to the side walls of the housing to prevent dust and moisture from seeping in through gaps. This structure can prevent external dust and moisture from entering the load cell, avoiding damage to internal components; it balances the heat dissipation and sealing protection requirements of the load cell, resolving the contradiction of traditional sealing structures where sealing is not breathable and breathability is not breathable; it achieves dual protection with just two layers of filter plates, with a simple structure that does not require complex sealing components; it provides comprehensive protection, blocking both dust and moisture, and is suitable for complex environments with high dust and high humidity.

[0039] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A sealing structure for a load cell, characterized in that, include: The enclosure has an air inlet and an air outlet at opposite ends, and both the air inlet and the air outlet are equipped with waterproof and dustproof structures. The waterproof and dustproof structure includes a waterproof and breathable filter plate and a dustproof and breathable filter plate stacked on top of each other, and the waterproof and breathable filter plate and the dustproof and breathable filter plate are sealed to the side walls of the box body on all four sides.

2. The sealing structure of the load cell as described in claim 1, characterized in that, The dustproof and breathable filter plate is disposed on the outside of the waterproof and breathable filter plate.

3. The sealing structure of the load cell as described in claim 1, characterized in that, The waterproof and breathable filter plate includes a waterproof filter plate and a first sealing frame fixed on the outside. The dustproof and breathable filter plate includes a dustproof filter plate and a second sealing frame fixed on the outside. The first sealing frame and the second sealing frame are sealed to the side wall of the box by fasteners.

4. The sealing structure of the load cell as described in claim 3, characterized in that, Both the air inlet and the air outlet are provided with outwardly opening flared mouths. The outer side of the first sealing frame is provided with a first inclined surface parallel to the side of the flared mouth, and the outer side of the second sealing frame is provided with a second inclined surface parallel to the side of the flared mouth. Both the first inclined surface and the second inclined surface are closely attached to the inclined surface of the flared mouth.

5. The sealing structure of the load cell as described in claim 3, characterized in that, The fasteners are a plurality of evenly spaced hexagonal socket screws, which penetrate the second sealing frame and the first sealing frame and are threaded to the side wall of the housing.

6. The sealing structure of the load cell as described in claim 5, characterized in that, A sealing washer is provided between the contact surface of the internal hexagon screw and the second sealing frame.

7. The sealing structure of the load cell as described in claim 4, characterized in that, An annular first sealing groove is formed between the inner side of the first sealing frame and the side wall of the box, and between the contact surface of the second sealing frame and the first sealing frame. An annular sealing element is provided in the first sealing groove.

8. The sealing structure of the load cell as described in claim 7, characterized in that, An annular second sealing groove is formed between the first inclined surface and the inclined surface of the flared mouth, and between the second inclined surface and the inclined surface of the flared mouth, and an annular sealing element is provided in the second sealing groove.

9. The sealing structure of the load cell as described in claim 8, characterized in that, The first sealing groove and the second sealing groove both have elliptical cross-sections, the seal has an annular cross-section, and the seal has X-shaped ribs on its inner side.

10. The sealing structure of the load cell as described in claim 3, characterized in that, The waterproof filter plate is a structure made of any one of the following materials: expanded polytetrafluoroethylene membrane, fully adhesive paper composite filter material, or sintered hydrophobic plastic plate. The dustproof filter plate is a structure made of any one of the following materials: synthetic fiber filter material, glass fiber filter material, metal porous filter material, paper filter material, or composite filter material.

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