Protective cover for gas densitometer

Abstract

The utility model provides a protective cover for a gas density meter, which comprises a back plate which is opaque, has a foam structure and is provided with a mounting hole penetrating through the back plate, and the back plate is arranged to be fixed on the back surface of the gas density meter by nesting the mounting hole on a mounting joint on the back surface of the gas density meter; the shell is opaque and is provided with a foam structure, the shell is matched with the back plate to form an inner cavity surrounding the gas density meter, the shell further comprises a window corresponding to the position of an instrument panel of the gas density meter, and the window is covered with a transparent material. The protective cover with the foam structure not only has an excellent ultraviolet-proof function, but also has good waterproof, windproof, anti-impact and anti-corrosion effects and the like, can be formed at one time, is simple and convenient to manufacture, low in cost and convenient for large-scale batch production, and is light in weight and convenient to carry and transport.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment, and in particular relates to a protective cover for a gas density meter used in high-voltage electrical equipment. Background Technology

[0002] With the development of industrialization and urbanization, a reliable power supply has become increasingly important. Gas density meters, represented by SF6 gas density meters (also known as SF6 density relays), are widely used in power equipment as important protection and control components in power systems. They can be used to monitor the density changes of SF6 gas in operating SF6 gas equipment, and their performance directly affects the safety of SF6 equipment.

[0003] When used in outdoor open-air equipment, the density meter will inevitably encounter various weather conditions such as sun exposure, wind, and rain. Rain and sunlight may affect the normal use of the density meter, such as insulation problems, false alarms, and may also affect the service life and performance of the density meter, posing a safety hazard.

[0004] Rain covers made of metal or PVC are now being used to protect SF6 gas density meters from rain. However, for SF6 gas density meters, these rain covers are not effective in preventing environmental factors from affecting their performance. This is because the working principle of SF6 gas density meters is based on the relationship between the density, pressure, and temperature of SF6 gas. Therefore, their accuracy is closely related to altitude and ambient temperature. Especially when used in areas with abundant sunshine and strong ultraviolet radiation, the high temperatures generated by high-intensity ultraviolet radiation can cause irreversible damage to the density meter, resulting in low measurement accuracy, failure to alarm, or false alarms.

[0005] Therefore, it is necessary to provide a gas density meter protective cover that can effectively isolate ultraviolet rays to protect the equipment from ultraviolet radiation and maximize the accuracy and service life of the density meter. Utility Model Content

[0006] The purpose of this disclosure is to provide a protective cover for a gas density meter that at least partially eliminates the defects of the prior art.

[0007] One object of this disclosure is to provide a protective cover for a gas density meter that can effectively block ultraviolet light.

[0008] One object of this disclosure is to provide a protective cover for a gas density meter that can effectively dissipate heat.

[0009] One object of this disclosure is to provide a protective cover for a gas density meter that can be manufactured easily and at low cost.

[0010] One object of this disclosure is to provide a protective cover for a gas density meter that can be easily assembled and disassembled.

[0011] To achieve at least one of the above objectives, according to one aspect of this disclosure, a protective cover for a gas density meter is provided, comprising: a back plate that is opaque and has a porous foam structure, and has a mounting hole through the back plate, wherein the back plate is configured to be fixed to the back of the gas density meter by nesting the mounting hole into a mounting connector on the back of the gas density meter; and a housing that is opaque and has a foam structure, the housing cooperating with the back plate to form an internal cavity surrounding the gas density meter, wherein the housing further includes a transparent window corresponding to the position of the instrument panel of the gas density meter.

[0012] Both the back panel and the shell are molded into a porous foam structure using a molding foaming process. This not only provides excellent UV protection but also offers good waterproof, windproof, impact-resistant, and corrosion-resistant properties. Furthermore, because it can be molded in one piece, it is easy to manufacture, low in cost, and suitable for large-scale mass production. The protective cover with the foam structure is also lightweight, making it easy to handle and transport.

[0013] Furthermore, the mounting hole and the mounting connector of the gas density meter form a snap-fit ​​engagement to fix the back plate relative to the gas density meter.

[0014] Furthermore, the housing includes a snap-fit ​​groove for engaging with a back plate, the snap-fit ​​groove having an open end and a closed end in a first direction, the back plate being inserted into the snap-fit ​​groove from the open end toward the closed end.

[0015] Furthermore, the back plate has a pair of first arms extending toward the closed end of the snap-fit ​​groove in a first direction, the free ends of the first arms having first protrusions; and the snap-fit ​​groove includes a pair of first recesses disposed at the closed end, wherein the first protrusions and the first recesses are configured such that when the back plate is inserted into the snap-fit ​​groove, the first protrusions engage with the corresponding first recesses, thereby restricting the relative movement of the back plate and the housing in the first direction.

[0016] Preferably, the back plate includes a pair of second arms extending outward from both sides of the back plate along a second direction perpendicular to the first direction, the free ends of the second arms having second protrusions; and the snap-fit ​​groove includes a pair of second recesses disposed at the open end, wherein the second protrusions and the second recesses are configured such that when the back plate is inserted into the snap-fit ​​groove, the second protrusions snap into the corresponding second recesses, thereby restricting the relative movement of the back plate and the housing in a direction perpendicular to the first direction.

[0017] Preferably, the back plate includes a pair of side grooves extending along the first direction on both sides in a second direction perpendicular to the first direction; and the snap-fit ​​groove includes protruding edges extending along the first direction on both sides in the second direction perpendicular to the first direction, wherein the side grooves and protruding edges are configured such that when the back plate is inserted toward the closed end of the snap-fit ​​groove, the protruding edges snap into the corresponding side grooves and slide along the side grooves, thereby guiding the insertion of the back plate and restricting the relative movement of the back plate and the housing in a direction perpendicular to the first direction.

[0018] In this disclosure, the back plate and the housing, as well as the mounting joint between the back plate and the gas density meter, are assembled and fixed by a snap-fit ​​structure. The structure is simple and easy to operate, effectively saving labor and time costs when installing the protective cover.

[0019] Furthermore, the housing also includes a shielding protrusion that protrudes relative to the housing to shield the cable interface of the gas density meter, wherein the shielding protrusion and the back plate define an opening through which the cable interface passes.

[0020] This shielding protrusion effectively protects the cable interface of the gas density meter, helping to prevent circuit insulation failures caused by rainwater seeping into the interface. In addition, the opening of the shielding protrusion is integrally connected to the opening end of the snap-fit ​​groove, which facilitates the installation of the protective cover on the gas density meter connected to the cable.

[0021] Preferably, the outer surface of the housing is provided with an anti-ultraviolet coating, and the viewing window is covered with a transparent anti-ultraviolet material, which can further enhance the heat insulation effect of the protective cover.

[0022] Preferably, the housing and / or back panel are provided with multiple heat dissipation holes, thereby achieving effective heat dissipation while effectively blocking ultraviolet rays.

[0023] The gas density meter protective cover according to the present disclosure can effectively isolate ultraviolet rays, while also having good waterproof, windproof, impact-resistant, and corrosion-resistant effects. It can effectively reduce problems such as inaccurate measurement, false alarms, and insulation failures caused by severe weather, and can maximize the accuracy and service life of the density meter. Attached Figure Description

[0024] The features and advantages of one or more embodiments of the present invention will become more readily understood from the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components. In the drawings:

[0025] Figure 1 This is a perspective view of a protective cover for a gas density meter according to an embodiment of the present disclosure;

[0026] Figure 2 This is a perspective view of a protective cover for a gas density meter according to an embodiment of the present disclosure from another angle;

[0027] Figure 3 This is an exploded view of a protective cover for a gas density meter according to an embodiment of the present disclosure.

[0028] Explanation of icon numbers:

[0029] 10 back panel, 12 mounting holes

[0030] 14 First arm 15 First protrusion

[0031] 16 Second arm 17 Second protrusion 18 Side groove

[0032] 20 Housing 22 Viewing window 29 Shielding protrusion

[0033] 24 Snap-in slot 24a Open end 24b Closed end

[0034] 25 first recess 27 second recess 28 convex edge

[0035] d1 First direction d2 Second direction d3 Third direction Detailed Implementation

[0036] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise.

[0038] Figure 1 and Figure 2 This is a schematic diagram of a protective cover for a gas density meter according to an embodiment of the present disclosure. Figure 1 and Figure 2As shown, a protective cover for a gas density meter according to an embodiment of the present disclosure includes: a back plate 10 made of an opaque porous foam material and having a mounting hole 12 therethrough, and the back plate 10 is configured to be mounted on the back of the gas density meter by nesting the mounting hole 12 into a mounting connector on the back of the gas density meter; and a housing 20 also made of an opaque porous foam material, which cooperates with the back plate 10 to form an internal cavity surrounding the gas density meter. Further, the housing 20 also includes a viewing window 22 corresponding to the position of the instrument panel of the gas density meter, the viewing window 22 being covered by a transparent material.

[0039] In this disclosure, a backplate and shell with a porous foam structure are formed by a molding foaming process, which gives the protective cover according to this disclosure many advantages, such as, but not limited to: a wide range of materials for molding the backplate and shell, which can be selected from any common materials used to form rigid foam plastic products, such as polystyrene, polyurethane, phenolic resin, amino resin, epoxy resin, thermosetting acrylic resin, etc.; the foam structure of the backplate and shell gives the protective cover excellent isolation and protection functions, not only providing excellent UV protection for the gas density meter, but also having good waterproof, windproof, impact-resistant, and corrosion-resistant effects; in addition, the backplate and shell can be formed in one step by a molding foaming process, which is simple to manufacture, low in cost, and easy to mass-produce; furthermore, the protective cover with this foam structure is lightweight, thus facilitating handling and transportation.

[0040] The following will combine Figure 2 and Figure 3 The structure of the protective cover according to an embodiment of this disclosure is described in detail.

[0041] The mounting holes 12 on the back plate 10 engage with the mounting connector of the gas density meter, thus securing the back plate 10 relative to the mounting connector. Therefore, the back plate can be fixed to the gas density meter without the need for additional installation tools or fasteners.

[0042] Furthermore, the housing 20 and the back plate 10 are also assembled entirely through a snap-fit ​​structure. For example... Figure 2 and Figure 3 As shown, one side of the housing 20 includes a snap-fit ​​groove 24 for engaging with the back plate 10. The snap-fit ​​groove 24 has an open end 24a (lower end) and a closed end 24b (upper end) arranged along a first direction d1 (vertical direction in use). In use, the back plate 10 can be assembled by inserting it from the open end 24a toward the closed end 24b from bottom to top into the snap-fit ​​groove 24.

[0043] To ensure the secure snap-fit ​​between the housing 20 and the back plate 10, such as Figure 3As shown, the back plate 10 has a pair of first arms 14 extending toward the closed end 24b of the snap-fit ​​groove 24 in the first direction d1. Each first arm 14 has a first protrusion 15 at its free end. Correspondingly, the snap-fit ​​groove 24 includes a pair of first recesses 25 disposed at the closed end 24b. The first protrusions 15 and the first recesses 25 are configured such that when the back plate 10 is inserted into the snap-fit ​​groove 24, the two first protrusions 15 respectively engage with the corresponding first recesses 25 to limit the relative displacement between the back plate 10 and the housing 20 in the first direction d1, thereby achieving position locking of the back plate 10 relative to the housing 20 in the first direction d1.

[0044] Furthermore, in order to achieve locking of the back plate 10 and the housing 20 in other directions, such as... Figure 3 As shown, the back plate 10 also includes a pair of second arms 16 extending outward from both sides of the back plate 10 along a second direction d2 (left-right direction) perpendicular to the first direction d1. Each second arm 16 has a second protrusion 17 at its free end. Correspondingly, each snap-fit ​​groove 24 includes a pair of second recesses 27 disposed at the opening end 24a. The second protrusions 17 and the second recesses 27 are configured such that when the back plate 10 is inserted into the snap-fit ​​groove 24, the second protrusions 17 snap into the corresponding second recesses 27 to limit the relative displacement between the back plate 10 and the housing 20 in the second direction d2 (left-right direction) and the third direction d3 (front-back direction) perpendicular to the first direction d1, thereby locking the position of the back plate 10 relative to the housing 20 in the second direction d2 (left-right direction) and the third direction d3 (front-back direction).

[0045] Alternatively or additionally, the back plate 10 also includes a pair of side grooves 18 extending along the first direction d1 on both sides of the second direction d2. Correspondingly, the snap-fit ​​groove 24 includes protruding edges 28 extending along the first direction d1 on both sides of the second direction d2. The side grooves 18 and the protruding edges 28 are configured such that when the back plate 10 is inserted toward the closed end of the snap-fit ​​groove 24, the protruding edges 28 snap into the corresponding side grooves 18 and slide along the side grooves 18. The structural combination of the side grooves 18 and the protruding edges 28 is beneficial to guiding the back plate 10 to be smoothly inserted into the snap-fit ​​groove 24 along the first direction d1. On the other hand, it can also lock the position of the back plate 10 relative to the housing 20 in the second direction d2 (left-right direction) and the third direction d3 (front-back direction).

[0046] In this disclosure, the back plate 10 is locked relative to the housing 20 in the first direction d1 by the combination of the first protrusion 15 and the first recess 25, and the back plate 10 is locked relative to the housing 20 in the second direction d2 and the third direction d3 by the combination of the second protrusion 17 and the second recess 27. Furthermore, the back plate 10 is guided smoothly into the snap-fit ​​groove 24 by the combination of the side groove 18 and the convex edge 28, thereby locking the back plate 10 relative to the housing 20 in the second direction d2 and the third direction d3. This allows for a firm connection between the back plate 10 and the housing 20 without any additional connectors or fasteners. Moreover, the assembly process is simple, and the back plate 10 and the housing 20 can be installed and fixed with a single insertion operation, which greatly saves labor and time costs.

[0047] Furthermore, the housing 20 also includes a shielding protrusion 29 protruding relative to the housing 20 to shield the cable interface of the gas density meter. The position and orientation of the shielding protrusion 29 can be set according to the position and orientation of the cable interface of the gas density meter. To facilitate the installation of the protective cover on the gas density meter connected to the cable, preferably, the opening of the shielding protrusion is integrally connected to the opening end 24a of the snap-fit ​​groove 24. In other words, the shielding protrusion 29 and the back plate 10 together define the opening through which the cable interface passes. By providing this shielding protrusion 29, the cable interface of the gas density meter can be effectively protected, especially to avoid circuit insulation failures caused by rainwater seeping into the interface.

[0048] Optionally, depending on actual needs, an anti-ultraviolet coating can be applied to the outer surface of the housing 20 to further enhance the heat insulation effect of the protective cover. Similarly, the transparent material at the window 22 can be a transparent anti-ultraviolet material (such as anti-ultraviolet glass), or it can be other transparent materials coated with a transparent anti-ultraviolet coating.

[0049] Further optionally, in order to achieve better heat dissipation, a series of small-sized heat dissipation holes can be provided on the housing 20 and / or the back plate 10 to achieve effective heat dissipation while effectively isolating ultraviolet rays. Preferably, the heat dissipation holes can be arranged in an array on opposite sides of the protective cover to facilitate the removal of heat inside the protective cover through air convection.

[0050] When used in areas with abundant sunshine and strong ultraviolet radiation, the high-temperature environment generated by the high-intensity ultraviolet radiation can cause irreversible damage to the densitometer, resulting in low measurement accuracy, failure to alarm, or false alarms.

[0051] The gas density meter protective cover according to the present disclosure can effectively isolate ultraviolet rays, while also having good waterproof, windproof, impact-resistant, and corrosion-resistant effects. It can effectively reduce problems such as inaccurate measurement, false alarms, and insulation failures caused by severe weather, and can maximize the accuracy and service life of the density meter.

[0052] In summary, the protective cover for a gas density meter disclosed herein mainly comprises a back plate 10 and a housing 20, with the main improvements being:

[0053] ① Both the back panel and the shell are molded into a foam structure through a molding foaming process, thus not only having excellent UV protection, but also good waterproof, windproof, impact-resistant, and corrosion-resistant effects.

[0054] ② The back plate and the housing, as well as the mounting joint between the back plate and the gas density meter, are assembled and fixed by a snap-fit ​​structure. The structure is simple and easy to operate, effectively saving labor and time costs when installing the protective cover.

[0055] The protective cover for a gas density meter disclosed herein has at least the following advantages:

[0056] ① The backplate and shell are formed by molding and foaming a porous foam structure, which gives the protective cover excellent isolation and protection functions. It not only provides excellent UV protection for the gas density meter, but also has good waterproof, windproof, impact-proof and corrosion-proof effects.

[0057] ② Both the back panel and the shell can be molded in one piece using a molding foaming process, which is simple to manufacture, low in cost, and easy to mass-produce.

[0058] ③ The protective cover with a porous foam structure is lightweight, making it easy to handle and transport.

[0059] ④ Assembly and fixation are achieved through a snap-fit ​​structure, which is simple in structure and easy to operate, effectively saving labor and time costs when installing the protective cover.

[0060] ⑤ The shielding protrusion can effectively protect the cable interface of the gas density meter, which helps to avoid circuit insulation failure caused by rainwater seeping into the interface. The shielding protrusion and the back plate together define the opening for the cable interface to pass through, which facilitates the installation of the protective cover on the gas density meter connected to the cable.

[0061] ⑥ The shell surface is coated with an anti-UV coating, which can further enhance the heat insulation effect of the protective cover.

[0062] ⑦ A series of small-sized heat dissipation holes are provided on the housing and / or back plate, which can effectively dissipate heat while effectively blocking ultraviolet rays.

[0063] The various embodiments and variations of this utility model have been described in detail above. However, those skilled in the art should understand that this utility model is not limited to the specific embodiments and variations described above, but may include various other possible combinations and arrangements. Other variations and modifications can be implemented by those skilled in the art without departing from the spirit and scope of this utility model. All these variations and modifications fall within the scope of this utility model. Moreover, all components described herein can be replaced by other technically equivalent components.

Claims

1. A protective cover for a gas density meter, characterized in that, The protective cover includes: A backplate (10), said backplate (10) being opaque and having a molded porous foam structure, and having a mounting hole (12) penetrating said backplate (10), wherein said backplate is configured to be fixed to the back of the gas density meter by means of the mounting hole (12) nested in a mounting connector on the back of the gas density meter; and The housing (20) is opaque and has a porous foam structure formed by molding and foaming. The housing (20) cooperates with the back plate (10) to form an internal cavity surrounding the gas density meter. The housing (20) also includes a window (22) corresponding to the position of the instrument panel of the gas density meter.

2. The protective cover for a gas density meter according to claim 1, characterized in that, The mounting hole (12) and the mounting connector of the gas density meter form a snap-fit ​​engagement to fix the back plate (10) relative to the gas density meter through the snap-fit ​​engagement.

3. The protective cover for a gas density meter according to claim 1, characterized in that, The housing (20) includes a snap-fit ​​groove (24) for engaging with the back plate (10), the snap-fit ​​groove (24) having an open end (24a) and a closed end (24b) in a first direction (d1), the back plate (10) being inserted into the snap-fit ​​groove (24) from the open end (24a) toward the closed end (24b).

4. The protective cover for a gas density meter according to claim 3, characterized in that, The back plate (10) has a pair of first arms (14) extending in the first direction (d1) toward the closed end (24b) of the snap-fit ​​groove (24), the free ends of the first arms (14) having first protrusions (15); and The snap-fit ​​groove (24) includes a pair of first recesses (25) disposed at the closed end (24b). The first protrusion (15) and the first recess (25) are configured such that when the back plate (10) is inserted into the snap-fit ​​groove (24), the first protrusion (15) snaps into the corresponding first recess (25), thereby restricting the relative movement of the back plate (10) and the housing (20) in the first direction (d1).

5. The protective cover for a gas density meter according to claim 3, characterized in that, The back plate (10) includes a pair of second arms (16) extending outward from both sides of the back plate (10) along a second direction (d2) perpendicular to the first direction (d1), the free ends of the second arms (16) having second protrusions (17); and The snap-fit ​​groove (24) includes a pair of second recesses (27) disposed at the open end (24a). The second protrusion (17) and the second recess (27) are configured such that when the back plate (10) is inserted into the snap-fit ​​groove (24), the second protrusion (17) snaps into the corresponding second recess (27).

6. The protective cover for a gas density meter according to claim 3, characterized in that, The back plate (10) includes a pair of side grooves (18) extending along the first direction (d1) on both sides in a second direction (d2) perpendicular to the first direction (d1); and The snap-fit ​​groove (24) includes protruding edges (28) extending along the first direction (d1) on both sides in a second direction (d2) perpendicular to the first direction (d1). The side groove (18) and the convex edge (28) are configured such that when the back plate (10) is inserted toward the closed end (24b) of the snap-fit ​​groove (24), the convex edge (28) snaps into the corresponding side groove (18) and slides along the side groove (18).

7. The protective cover for a gas density meter according to claim 3, characterized in that, The housing (20) further includes a shielding protrusion (29) protruding from the housing (20) to shield the cable interface of the gas density meter, wherein the shielding protrusion (29) and the back plate (10) define an opening through which the cable interface passes.

8. The protective cover for a gas density meter according to any one of claims 1 to 7, characterized in that, The outer surface of the housing (20) is provided with an anti-ultraviolet coating; and The window (22) is covered by a transparent UV-protective material.

9. The protective cover for a gas density meter according to any one of claims 1 to 7, characterized in that, The housing (20) and / or the back plate (10) are provided with a plurality of heat dissipation holes.

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