Gas density meter

Abstract

According to the gas density meter provided by the utility model, when the density of gas to be detected in external electrical equipment changes, the spring tube drives the connecting rod to rotate and drives the first indication board to rotate in the direction away from or close to the observation window at the same time; the second indication board or the first indication board is displayed in the observation window, the density state of the to-be-detected gas in the external electrical equipment can be visually judged, then the working state of the external electrical equipment is judged, additional accessories are not needed, the production process is simple, the manufacturing cost and the installation cost are saved, and the production efficiency is improved. The gas density monitoring device avoids the trouble of replacing parts, is convenient to manufacture, is very suitable for large-scale manufacturing and production, and avoids the defects of cost increase and inaccurate gas density monitoring caused by mechanical mechanism faults, so that gas density abnormity can be found in time, and potential safety accidents are avoided.

Description

Technical Field

[0001] This utility model relates to the field of density monitoring technology for electrical equipment, and in particular to a gas density meter. Background Technology

[0002] Sulfur hexafluoride (SF6) gas possesses excellent insulation and arc-quenching properties, and various SF6 electrical devices are widely used in power sectors and industrial and mining enterprises. The density of SF6 gas directly affects its insulation and arc-quenching performance; therefore, a SF6 gas density meter is typically used to monitor changes in the SF6 gas density within such equipment.

[0003] The pointer-type sulfur hexafluoride gas density meter is one of the most common density meters. It has an alarm and interlock function when sulfur hexafluoride electrical products leak. It uses a Bourdon tube as a pressure sensing element. The linear displacement of the Bourdon tube is converted into the rotation of the pointer by the action of the mechanism and other transmission mechanisms, and then indicated on the dial.

[0004] Therefore, existing gas density meters achieve multi-color display by indicating different areas on the dial with a pointer. However, in practical use, inaccurate pointer indication often occurs due to factors such as Bourdon tube deformation, gear wear, loose transmission mechanism, or pointer displacement. This necessitates component replacement or maintenance, increasing material and installation labor costs. Furthermore, pointer displacement leading to inaccurate indication makes it impossible to accurately determine whether the monitored gas density has changed, thus hindering the assessment of the electrical equipment's operational status. Additionally, since the pointer is typically a slender component, it is difficult to visually assess changes in the monitored gas density in poor lighting or confined spaces. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, this utility model provides a gas density meter that can directly display the density state of the gas to be measured through an indicator, thereby avoiding the increased costs caused by mechanical failures and the defects of inaccurate gas density monitoring, timely detection of gas density anomalies, and prevention of potential safety accidents.

[0006] To achieve the above objectives, this utility model provides a gas density meter for installation on external electrical equipment to monitor the density of a gas to be measured inside the external electrical equipment, comprising:

[0007] A spring tube, one end of which is connected to the gas to be tested inside the external electrical equipment;

[0008] The indicator unit includes a freely rotatable connecting rod and a first indicator plate disposed at one end of the connecting rod, and the other end of the connecting rod is connected to the other end of the spring tube;

[0009] An observation window and a second indicator sign disposed within the observation window. The second indicator sign can be observed through the observation window. The observation window is disposed on the rotation path of the first indicator sign and the first indicator sign is disposed in front of the second indicator sign. When the connecting rod drives the first indicator sign to rotate to the observation window, the first indicator sign can be observed through the observation window, while the second indicator sign is obscured.

[0010] Under normal operating conditions, the density of the gas to be tested inside the external electrical equipment increases, the other end of the Bourdon tube moves, driving the connecting rod to rotate and simultaneously causing the first indicator to rotate away from the observation window, and the second indicator is displayed in the observation window; under abnormal operating conditions, the density of the gas to be tested inside the external electrical equipment decreases, the other end of the Bourdon tube moves in the opposite direction, driving the connecting rod to rotate and simultaneously causing the first indicator to move to the observation window, so that the second indicator is blocked by the first indicator, and thus the first indicator is displayed in the observation window.

[0011] As a more preferred embodiment, the gas density meter further includes a transmission component, through which the other end of the connecting rod is connected to the other end of the Bourdon tube.

[0012] In a more preferred embodiment, the transmission component includes: an end seat, a compensating member, a transmission rod, a first magnetic member, a push plate, and a second magnetic member. The end seat is rotatably connected to the other end of the spring tube; one end of the compensating member is rotatably connected to the end seat, and the other end is rotatably connected to the transmission rod; the first magnetic member is disposed on the transmission rod; the push plate is connected to the other end of the connecting rod; the second magnetic member is disposed on the other side of the push plate opposite to the first magnetic member, such that the first magnetic member and the second magnetic member are respectively located on both sides of the push plate; under normal operating conditions, the density of the gas to be measured inside the external electrical equipment increases, the other end of the spring tube moves, and drives the compensating member to rotate through the end seat, thereby driving the transmission... The first magnetic element on the rod rotates towards the push plate, causing the push plate to rotate and, through the connecting rod, to rotate the first indicator away from the observation window, where the second indicator is displayed. Under abnormal operating conditions, the density of the gas to be measured inside the external electrical equipment decreases, and the other end of the spring tube moves in the opposite direction, causing the compensation element to rotate in the opposite direction through the end seat. This, in turn, causes the first magnetic element on the transmission rod to rotate away from the push plate, causing the second magnetic element to attract the push plate to rotate and, through the connecting rod, to move the first indicator to the observation window, whereby the second indicator is blocked by the first indicator, and the first indicator is displayed in the observation window.

[0013] In a more preferred embodiment, the gas density meter further includes a first limiting rod and a second limiting rod. Under normal operating conditions, the transmission rod drives the first magnetic component to rotate towards the push plate, causing the first magnetic component to attract the push plate to rotate and, through the connecting rod, drive the first indicator to rotate away from the observation window. When the transmission rod contacts the first limiting rod, the first limiting rod limits the transmission rod, and the second indicator is displayed in the observation window. Under abnormal operating conditions, when the second magnetic component attracts the push plate to rotate and, through the connecting rod, drives the first indicator to move to the observation window, the connecting rod contacts the second limiting rod, and the second limiting rod limits the connecting rod, causing the second indicator to be obscured by the first indicator, thereby displaying the first indicator in the observation window.

[0014] In a more preferred embodiment, the transmission component includes: an end seat, a compensating member, a transmission rod, a lever, a slide plate, and a spring. The end seat is rotatably connected to the other end of the spring tube. One end of the compensating member is rotatably connected to the end seat, and the other end is rotatably connected to the transmission rod. The lever is mounted on the transmission rod. The slide plate is connected to the lever. The slide plate has an elongated groove, and a slider is disposed within the elongated groove. One end of the slider is connected to the spring, and the other end is connected to the other end of the connecting rod. The lever has a first limiting post and a second limiting post, one end of which is respectively mounted on the lever, and the other end of which is respectively disposed within the elongated groove. Under normal operating conditions, the density of the gas to be measured inside the external electrical equipment increases, causing the other end of the spring tube to move. This movement drives the compensating member to rotate via the end seat, which in turn drives the transmission rod to rotate, causing the slider to move within the first... Under the pushing force of the limiting post, the slider is driven by the spring to slide in the long strip groove, thereby driving the connecting rod to rotate and simultaneously driving the first indicator to rotate away from the observation window. When the slider slides to the second limiting post, the second limiting post limits the slider, and the second indicator is displayed in the observation window. Under abnormal operating conditions, the density of the gas to be measured inside the external electrical equipment decreases, and the other end of the spring tube moves in the opposite direction. Through the end seat, the compensation component rotates in the opposite direction, thereby driving the transmission rod to rotate in the opposite direction. Under the pushing force of the second limiting post, the slider is driven by the spring to slide in the opposite direction in the long strip groove, thereby driving the connecting rod to rotate and simultaneously driving the first indicator to move to the observation window. The first limiting post limits the slider, so that the second indicator is blocked by the first indicator, and the first indicator is displayed in the observation window.

[0015] In a more preferred embodiment, the gas density meter further includes a base, one end of which is connected to the external electrical device, and a gas channel is formed inside the base, extending to one end of the base to allow the gas channel to be measured to be connected to the external electrical device; the gas channel is connected to one end of the Bourdon tube.

[0016] As a more preferred embodiment, the base is provided with a mounting hole, which communicates with the gas channel, and one end of the spring tube is connected to the gas channel through the mounting hole.

[0017] As a more preferred embodiment, the gas density meter also includes a dial, on which the observation window is disposed.

[0018] As a more preferred embodiment, the gas density meter further includes a cover and a housing, with the cover disposed at the open end of the housing; an inner cavity is formed between the cover and the housing; the spring tube, connecting rod, first indicator, second indicator, dial, and transmission components are all disposed within the inner cavity; and a glass is disposed on the cover.

[0019] As a more preferred approach, a sealing ring is provided between the watch glass and the watch case.

[0020] As described above, the gas density meter of this utility model is used to be installed on external electrical equipment to monitor the density of the gas to be measured inside the external electrical equipment. Under normal operating conditions, when the density of the gas to be measured inside the external electrical equipment increases, the other end of the spring tube moves, driving the connecting rod to rotate and simultaneously causing the first indicator to rotate away from the observation window. The second indicator is displayed in the observation window, thereby determining that the density of the gas to be measured inside the external electrical equipment is normal and there is no leakage or other abnormality. Under abnormal operating conditions, the density of the gas to be measured inside the external electrical equipment decreases. The other end of the Bourdon tube moves in the opposite direction, driving the connecting rod to rotate and simultaneously moving the first indicator to the observation window. This causes the second indicator to be blocked by the first indicator, thus displaying the first indicator in the observation window. This indicates that the density of the gas to be measured inside the external electrical equipment is abnormal, possibly indicating a leak or other malfunction. The Bourdon tube drives the connecting rod to rotate, simultaneously causing the first indicator to rotate away from or towards the observation window, displaying either the second or first indicator in the observation window. This allows for a direct assessment of the density of the gas to be measured inside the external electrical equipment, thereby determining the equipment's operating status. No additional accessories are required, the manufacturing process is simple, saving manufacturing and installation costs, avoiding the hassle of replacing parts, and is easy to manufacture. It is very suitable for mass production, avoiding the increased costs caused by mechanical failures and the defects of inaccurate gas density monitoring. This allows for timely detection of gas density anomalies, preventing potential safety accidents. Attached Figure Description

[0021] Figure 1 The diagram shown is a first structural schematic of the gas density meter of this utility model.

[0022] Figure 2 The diagram shown is a schematic diagram of the internal structure of the first type of gas density table of this utility model.

[0023] Figure 3 The diagram shown is a schematic diagram of another internal structure of the first structure of the gas density table of this utility model.

[0024] Figure 4 The diagram shows the combined structure of the dial and internal structure of the gas density meter of this invention.

[0025] Figure 5 The diagram shown is a second structural schematic of the gas density table of this utility model.

[0026] Figure 6 The diagram shown is an internal structural schematic of the second type of gas density meter of this invention.

[0027] Figure 7 The diagram shown is a schematic diagram of another internal structure of the second type of gas density meter of this utility model.

[0028] Figure 8 This is another structural diagram showing the combination of the dial and internal structure of the gas density meter of this utility model.

[0029] Figure 9 The diagram shown is a structural schematic of the dial of the gas density meter of this utility model.

[0030] Component designation explanation

[0031] 1. Bourdon tube

[0032] 2-link

[0033] 3 First signpost

[0034] 4 dials

[0035] 41 Observation Window

[0036] 5 Second sign

[0037] 6 End seats

[0038] 7. Compensation components

[0039] 8. Transmission rod

[0040] 9 First magnetic component

[0041] 10 push plates

[0042] 11 Second magnetic component

[0043] 12 First limit rod

[0044] 13 Second limit rod

[0045] 14 levers

[0046] 141 First Limiting Post

[0047] 142 Second limit post

[0048] 15 Skateboards

[0049] 16 sliders

[0050] 17 Springs

[0051] 18 bases

[0052] 181 Gas Channel

[0053] 19 Watch Cover

[0054] 191 Watch Glass

[0055] 20 Case

[0056] 21 Sealing ring

[0057] 22 Third limit rod Detailed Implementation

[0058] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0059] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit this application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" 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 according to the specific circumstances.

[0061] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0062] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the invention.

[0063] like Figure 1-9 As shown, this utility model provides a gas density meter, which is used to be installed on external electrical equipment to monitor the density of a gas to be measured inside the external electrical equipment, including:

[0064] A spring tube 1, one end of which is connected to the gas to be tested inside the external electrical equipment;

[0065] The indicator unit includes a freely rotatable connecting rod 2 and a first indicator 3 disposed at one end of the connecting rod 2, and the other end of the connecting rod 2 is connected to the other end of the spring tube 1;

[0066] The observation window 41 and the second indicator 5 disposed within the observation window 41 allow the second indicator 5 to be observed through the observation window 41. The observation window 41 is disposed on the rotation path of the first indicator 3 and the first indicator 3 is disposed in front of the second indicator 5. When the connecting rod 2 drives the first indicator 3 to rotate to the observation window 41, the first indicator 3 can be observed through the observation window 41, while the second indicator 5 is blocked.

[0067] Under normal operating conditions, the density of the gas to be tested inside the external electrical equipment increases, and the other end of the spring tube 1 moves, driving the connecting rod 2 to rotate and simultaneously causing the first indicator 3 to rotate away from the observation window 41. The second indicator 5 is then displayed in the observation window 41. Under abnormal operating conditions, the density of the gas to be tested inside the external electrical equipment decreases, and the other end of the spring tube 1 moves in the opposite direction, driving the connecting rod 2 to rotate and simultaneously causing the first indicator 3 to move to the observation window 41, so that the second indicator 5 is blocked by the first indicator 3, and thus the first indicator 3 is displayed in the observation window 41.

[0068] This utility model discloses a gas density meter for installation on external electrical equipment to monitor the density of the gas to be measured inside the equipment. Under normal operating conditions, when the density of the gas to be measured inside the equipment increases, the other end of the spring tube 1 moves, driving the connecting rod 2 to rotate and simultaneously causing the first indicator 3 to rotate away from the observation window 41. The second indicator 5 is displayed in the observation window 41, thereby determining that the density of the gas to be measured inside the equipment is normal and there is no leakage or other abnormality. Under abnormal operating conditions, the density of the gas to be measured inside the external electrical equipment decreases. The other end of the spring tube 1 moves in the opposite direction, driving the connecting rod 2 to rotate and simultaneously moving the first indicator 3 to the observation window 41. This causes the second indicator 5 to be blocked by the first indicator 3, thus displaying the first indicator 3 within the observation window 41. This indicates that the density of the gas to be measured inside the external electrical equipment is abnormal, possibly indicating a leak or other malfunction. The spring tube 1 drives the connecting rod 2 to rotate, simultaneously causing the first indicator 3 to rotate away from or towards the observation window 41, displaying either the second indicator 5 or the first indicator 3 within the observation window 41. This allows for a direct assessment of the density of the gas to be measured inside the external electrical equipment, thereby determining the equipment's operating status. No additional accessories are required, the manufacturing process is simple, saving manufacturing and installation costs, avoiding the hassle of replacing parts, and is easy to manufacture. It is very suitable for mass production, avoiding the increased costs caused by mechanical failures and the defects of inaccurate gas density monitoring. This allows for timely detection of gas density anomalies, preventing potential safety accidents.

[0069] In this embodiment, as Figure 1-8As shown, the Bourdon tube 1, also known as a Bourdon tube or bellows tube, and also called a C-tube due to its "C" shape, is a metal tube with one end free and closed. During operation, the open end of the tube is generally fixed. When the inner cavity of the tube is subjected to fluid pressure P, the curvature of the tube changes, and the free end produces a linear displacement. Therefore, the Bourdon tube 1 can be used as a pressure-sensitive element. The Bourdon tube 1 converts changes in gas pressure into changes in displacement, thereby driving the internal mechanism components to display the gas density. Since the Bourdon tube 1 is a crucial pressure-sensing element, its accuracy determines the display accuracy of the density meter.

[0070] In this embodiment, as Figure 1-8 As shown, one end of the Bourdon tube 1 (i.e., the open end) is connected to the gas to be tested inside the external electrical equipment, and the other end of the Bourdon tube 1 (i.e., the free end) is connected to the other end of the connecting rod 2. When the density of the gas to be tested changes, the other end of the Bourdon tube 1 is displaced according to the change in gas density, thereby causing the connecting rod 2 to rotate, so as to rotate the first indicator 3 in a direction away from or towards the observation window 41, so that the second indicator 5 or the first indicator 3 is displayed in the observation window 41.

[0071] In this embodiment, as Figure 1-8 As shown, the first indicator 3 is red, and the second indicator 5 is green. When the red first indicator 3 is observed through the observation window 41, it is immediately apparent that the density of the gas being tested inside the external electrical equipment is abnormal. When the green second indicator 5 is observed through the observation window 41, it is immediately apparent that the density of the gas being tested inside the external electrical equipment is normal. Thus, even in poorly lit or confined spaces, the density of the gas being tested inside the external electrical equipment can be quickly and easily determined by observing the color of the indicator displayed through the observation window 41, providing a convenient and intuitive way to determine the density.

[0072] In this embodiment, as Figure 1-8 As shown, the gas density meter also includes a transmission component, and the other end of the connecting rod 2 is connected to the other end of the spring tube 1 through the transmission component. Thus, by driving the connecting rod 2 to rotate through the transmission component, the first indicator 3 is simultaneously rotated in a direction away from or towards the observation window 41, causing the second indicator 5 or the first indicator 3 to be displayed within the observation window 41, thereby enabling a direct assessment of the density state of the gas to be measured inside the external electrical equipment.

[0073] In this embodiment, as Figure 1-4As shown, the transmission component includes: an end seat 6, a compensating member 7, a transmission rod 8, a first magnetic member 9, a push plate 10, and a second magnetic member 11. One end of the end seat 6 is rotatably connected to one end of the compensating member 7, and the other end of the end seat 6 is rotatably connected to the other end of the spring tube 1. The other end of the compensating member 7 is rotatably connected to one end of the transmission rod 8. The first magnetic member 9 is disposed at the other end of the transmission rod 8. The push plate 10 is connected to the other end of the connecting rod 2. The second magnetic member 11 is disposed on the other side of the push plate 10 opposite to the first magnetic member 9, such that the first magnetic member 9 and the second magnetic member 11 are respectively located on both sides of the push plate 10. The second magnetic member 11 is fixed to the case and disposed on the rotation path of the first indicator 3. Under normal operating conditions, the density of the gas to be measured inside the external electrical equipment increases, and the other end of the spring tube 1 moves, passing through the end seat. 6 drives the compensation component 7 to rotate, which in turn drives the first magnetic component 9 on the transmission rod 8 to rotate towards the push plate 10. This causes the first magnetic component 9 to attract the push plate 10 to rotate and, through the connecting rod 2, drives the first indicator 3 to rotate away from the observation window 41. The second indicator 5 is displayed in the observation window 41. Under abnormal operating conditions, the density of the gas to be tested inside the external electrical equipment decreases, and the other end of the spring tube 1 moves in the opposite direction. This causes the compensation component 7 to rotate in the opposite direction through the end seat 6, which in turn drives the first magnetic component 9 on the transmission rod 8 to rotate away from the push plate 10. This causes the second magnetic component 11 to attract the push plate 10 to rotate and, through the connecting rod 2, drives the first indicator 3 to move to the observation window 41. This causes the second indicator 5 to be blocked by the first indicator 3, and the first indicator 3 is displayed in the observation window 41.

[0074] In this embodiment, one end of the end seat 6 is provided with a bearing seat containing a miniature bearing, and one end of the compensating member 7 is provided with a first shaft pin. By inserting the first shaft pin into the bearing seat, a rotatable connection is achieved between one end of the end seat 6 and one end of the compensating member 7, thereby enabling the compensating member 7 to rotate freely. The other end of the end seat 6 is provided with a second shaft pin, and the other end of the spring tube 1 is provided with a first shaft hole corresponding to the second shaft pin, so that a rotatable connection is achieved between the other end of the end seat 6 and the other end of the spring tube 1 through the shaft hole engagement, thereby enabling the spring tube 1 to move when the gas pressure changes. The other end of the compensating member 7 is provided with a second shaft hole, and one end of the transmission rod 8 is provided with a third shaft pin that engages with the second shaft hole. One end of the transmission rod 8 is connected to the other end of the compensating member 7 through the third shaft pin, enabling free rotation to drive the first magnetic member 9 to rotate.

[0075] In this embodiment, the compensation component 7 is a bimetallic element for temperature compensation. A bimetallic material is a composite material consisting of two layers of metals (or alloys) with different coefficients of thermal expansion, firmly bonded together. The layer with the higher coefficient of thermal expansion is called the active layer, and the layer with the lower coefficient of thermal expansion is called the passive layer. When heated, both metal layers expand, but the active layer expands more than the passive layer. Because the two metal layers are firmly bonded together and cannot stretch freely, the active layer bends towards the passive layer.

[0076] In this embodiment, one end of the compensating member 7 is rotatably connected to the other end of the spring tube 1 via the end seat 6, and the other end is rotatably connected to one end of the transmission rod 8. Thus, according to changes in gas pressure, the other end of the spring tube 1 displaces, thereby causing the compensating member 7 to rotate. The compensating member 7 has a temperature compensation function, correcting for changes in pressure and temperature. When the gas density inside the electrical equipment under test changes, it indicates an increase or decrease in the amount of gas inside the equipment. This change in gas quantity causes the other end of the spring tube to displace, converting the gas pressure change into a density change, which in turn causes the compensating member 7 to rotate along the rotatable connection with the end seat 6. This, in turn, causes the transmission rod 8 to rotate along the rotatable connection with the compensating member 7, thereby causing the first indicator 3 to rotate via the connecting rod 2, thus displaying or obscuring the second indicator 5. The specific process is as follows: When the gas density increases, the other end of the spring tube 1 moves, causing the compensating member 7 to rotate via the end seat 6. The compensating member 7 then causes the first magnetic member 9 to rotate towards the push plate 10 via the transmission rod 8, displaying the second indicator 5 in the observation window 41. When the gas density decreases, the other end of the spring tube 1 moves in the opposite direction, driving the compensation component 7 to rotate through the end seat 6. The compensation component 7 drives the first magnetic component 9 to rotate away from the push plate 10 through the transmission rod 8. The second magnetic component 11 attracts the push plate 10 to rotate, and the first indicator 3 is displayed in the observation window 41, thus realizing the switching of the indicator.

[0077] In this embodiment, as Figure 1-4 As shown, the first magnetic component 9 and the second magnetic component 11 are made of magnetite. Similarly, they can also be made of other magnetic materials, such as magnets. The attraction between the first magnetic component 9 or the second magnetic component 11 and the push plate 10 drives the connecting rod 2 to rotate, and simultaneously drives the first indicator 3 to rotate away from or towards the observation window 41, so that the second indicator 5 or the first indicator 3 is displayed in the observation window 41. No additional accessories are needed, the production process is simple, manufacturing and installation costs are saved, the trouble of replacing parts is avoided, and it is easy to manufacture, making it very suitable for mass production.

[0078] In this embodiment, as Figure 2-4As shown, the gas density gauge also includes a first limiting rod 12, a second limiting rod 13, and a third limiting rod 22. The first limiting rod 12 is disposed on the rotation path of the transmission rod 8, and the second limiting rod 13 and the third limiting rod 22 are disposed at both ends of the rotation path of the connecting rod 2. The first limiting rod 12, the second limiting rod 13, and the third limiting rod 22 are all fixed to the gauge housing. Figure 2 As shown, under normal operating conditions, the transmission rod 8 drives the first magnetic component 9 to rotate towards the push plate 10, causing the first magnetic component 9 to attract the push plate 10 to rotate and, through the connecting rod 2, drive the first indicator 3 to rotate away from the observation window 41. When the transmission rod 8 contacts the first limiting rod 12, the first limiting rod 12 limits the transmission rod 8, and the third limiting rod 22 limits the connecting rod 2, preventing the transmission rod 8 from rotating towards the push plate 10 and preventing the connecting rod 2 from driving the first indicator 3 to continue rotating away from the observation window 41. The first indicator 3 rotates until... Figure 2 At the indicated position, the first indicator 3 no longer obstructs the second indicator 5, and the second indicator 5 is displayed in the observation window 41. Under abnormal operating conditions, such as... Figure 3 As shown, the first magnetic element 9 on the transmission rod 8 rotates away from the push plate 10. Because the third limiting rod 22 limits the connecting rod 2, the first magnetic element 9 and the push plate 10 separate, and the magnetic force of the first magnetic element 9 on the push plate 10 weakens. The magnetic force of the second magnetic element 11 on the push plate 10 begins to dominate. When the second magnetic element 11 attracts the push plate 10 to rotate and drives the first indicator 3 to move to the observation window 41 via the connecting rod 2, the connecting rod 2 contacts the second limiting rod 13. The second limiting rod 13 limits the connecting rod 2, and the first indicator 3 rotates to the observation window 41. Figure 3 The position shown obscures the second indicator 5 from the first indicator 3, thus displaying the first indicator 3 within the observation window 41. When the first indicator 3 moves away from the observation window 41 and the second indicator 5 is displayed within the observation window 41, the first limiting rod 12 limits the transmission rod 8, preventing it from continuing to rotate. When the first indicator 3 moves to the observation window 41, the second limiting rod 13 limits the connecting rod 2, preventing it from driving the first indicator 3 to continue rotating, thus achieving precise positioning of either the first indicator 3 or the second indicator 5 within the observation window 41.

[0079] In this embodiment, as Figure 5-8As shown, the transmission component includes: an end seat 6, a compensating member 7, a transmission rod 8, a lever 14, a slide plate 15, and a spring 17. One end of the end seat 6 is rotatably connected to one end of the compensating member 7, and the other end of the end seat 6 is rotatably connected to the other end of the spring tube 1. The other end of the compensating member 7 is rotatably connected to one end of the transmission rod 8. The lever 14 is disposed at the other end of the transmission rod 8. The slide plate 15 is connected to the lever 14. A long strip-shaped groove is provided on the slide plate 15, and a slider 16 is disposed in the long strip-shaped groove. One end of 6 is connected to spring 17, and the other end is connected to the other end of connecting rod 2; the lever 14 is provided with a first limiting post 141 and a second limiting post 142, one end of the first limiting post 141 and the second limiting post 142 are respectively provided on the lever 14, and the other end is respectively provided in the elongated groove; under normal working conditions, the density of the gas to be measured inside the external electrical equipment increases, the other end of the spring tube 1 moves, and drives the compensation component 7 to rotate through the end seat 6, thereby driving the transmission rod 8 to rotate, so that the slider 1 6. Under the pushing force of the first limiting post 141, the spring 17 drives the slider 16 to slide in the elongated groove, thereby driving the connecting rod 2 to rotate and simultaneously driving the first indicator 3 to rotate away from the observation window 41. When the slider 16 slides to the second limiting post 142, the second limiting post 142 limits the slider 16, and the second indicator 5 is displayed in the observation window 41. Under abnormal operating conditions, the density of the gas to be measured inside the external electrical equipment decreases, and the other end of the spring tube 1 moves in the opposite direction. The end seat 6 drives the compensation component 7 to rotate in the opposite direction, which in turn drives the transmission rod 8 to rotate in the opposite direction. Under the pushing force of the second limiting post 142, the slider 16 slides in the opposite direction in the long strip groove through the spring 17. This drives the connecting rod 2 to rotate and simultaneously moves the first indicator 3 to the observation window 41. The first limiting post 141 limits the slider 16, so that the second indicator 5 is blocked by the first indicator 3, and the first indicator 3 is displayed in the observation window 41.

[0080] In this embodiment, as Figure 6As shown, under normal operating conditions, the density of the gas to be measured inside the external electrical equipment increases, causing the other end of the spring tube 1 to move. This moves the compensating component 7 through the end seat 6, which in turn drives the transmission rod 8 to rotate. This causes the slider 16 to slide within the elongated groove under the pushing force of the first limiting post 141 and the spring 17, thus driving the connecting rod 2 to rotate and simultaneously causing the first indicator 3 to rotate away from the observation window 41. When the slider 16 slides from point C to point A within the elongated groove, the spring 17 is at its maximum compression. At this point, under the pushing force of the first limiting post 141 and the spring force, the slider 16 continues to slide from point A. When the spring 17 drives the slider 16 to slide from point A to point B within the elongated groove, the first indicator 3 rotates to the position shown in the image. Figure 6 At the indicated position, the second limiting post 142 limits the slider 16, the first indicator 3 no longer blocks the second indicator 5, and the second indicator 5 is displayed in the observation window 41. Figure 7 As shown, similarly, under abnormal operating conditions, the density of the gas to be measured inside the external electrical equipment decreases, and the other end of the spring tube 1 moves in the opposite direction. Through the end seat 6, it drives the compensation component 7 to rotate in the opposite direction, which in turn drives the transmission rod 8 to rotate in the opposite direction. This causes the slider 16 to slide in the elongated groove under the pushing force of the second limiting post 142 via the spring 17, thereby driving the connecting rod 2 to rotate and simultaneously driving the first indicator 3 to rotate towards the observation window 41. When the slider 16 slides from point B to point A in the elongated groove, the spring 17 is in the maximum compression state. At this time, under the pushing force of the second limiting post 142 and the action of the spring force, the slider 16 continues to slide from point A. When the spring 17 drives the slider 16 to continue sliding from point A to point C in the elongated groove, the first indicator 3 rotates to the position shown in the image. Figure 7 At the position shown, the first limiting post 141 limits the slider 16, the first indicator 3 blocks the second indicator 5, and the first indicator 3 is displayed in the observation window 41.

[0081] In this embodiment, as Figure 1-8 As shown, the gas density meter also includes a base 18, one end of which is connected to the external electrical equipment, and a gas channel 181 is formed inside the base 18. The gas channel 181 extends to one end of the base 18 so that the gas channel 181 is connected to the gas to be measured by the external electrical equipment; the gas channel 181 is connected to one end of the spring tube 1.

[0082] In this embodiment, as Figure 1-8 As shown, a mounting hole is provided on the base 18, which is connected to the gas channel 181. One end of the spring tube 1 is connected to the gas channel 181 through the mounting hole.

[0083] In this embodiment, as Figure 1, 4 As shown in Figures 5, 8, and 9, the gas density meter also includes a dial 4, and the observation window 41 is disposed on the dial 4.

[0084] In this embodiment, as Figure 1-8 As shown, the gas density meter also includes a cover 19 and a case 20. The cover 19 is disposed at the open end of the case 20. An inner cavity is formed between the cover 19 and the case 20. The spring tube 1, connecting rod 2, first indicator 3, second indicator 5, dial 4, and transmission components are all disposed in the inner cavity. A watch glass 191 is disposed on the cover 19.

[0085] In this embodiment, as Figure 1-8 As shown, a sealing ring 21 is provided between the watch glass 191 and the watch case 20. This improves the sealing performance of the watch case 20 and effectively prevents oil or air leakage.

[0086] As described above, the gas density meter of this invention, through the Bourdon tube 1 driving the connecting rod 2 to rotate, simultaneously causes the first indicator 3 to rotate in a direction away from or towards the observation window 41. This allows the second indicator 5 or the first indicator 3 to be displayed within the observation window 41, enabling a direct assessment of the density state of the gas to be measured inside the external electrical equipment, thereby determining the operating status of the external electrical equipment. No additional accessories are required, the manufacturing process is simple, saving manufacturing and installation costs, avoiding the hassle of replacing parts, and is easy to manufacture, making it very suitable for mass production. It avoids the increased costs caused by mechanical failures and the defects of inaccurate gas density monitoring, thus enabling timely detection of gas density anomalies and preventing potential safety accidents. In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0087] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A gas density meter for installation on an external electrical device to monitor the density of a gas to be measured inside the external electrical device, characterized by, The gas density gauge comprises: a spring tube (1) with one end in communication with the gas to be measured inside the external electrical equipment; an indicating unit comprising a link (2) capable of rotating freely and a first indicating board (3) arranged at one end of the link (2), the other end of the link (2) being connected to the other end of the spring tube (1); an observation window (41) and a second indicating board (5) arranged in the observation window (41), the second indicating board (5) being visible through the observation window (41), the observation window (41) being arranged on the rotating path of the first indicating board (3) and the first indicating board (3) being arranged in front of the second indicating board (5), when the link (2) drives the first indicating board (3) to rotate to the observation window (41), the first indicating board (3) is visible through the observation window (41) and the second indicating board (5) is blocked; under normal working conditions, the density of the gas to be measured inside the external electrical equipment rises, the other end of the spring tube (1) moves, drives the link (2) to rotate and simultaneously drives the first indicating board (3) to rotate in the direction away from the observation window (41), and the second indicating board (5) is displayed in the observation window (41); under abnormal working conditions, the density of the gas to be measured inside the external electrical equipment drops, the other end of the spring tube (1) moves reversely, drives the link (2) to rotate and simultaneously drives the first indicating board (3) to move to the observation window (41), so that the second indicating board (5) is blocked by the first indicating board (3) and the first indicating board (3) is displayed in the observation window (41).

2. The gas density meter of claim 1, wherein The gas density gauge further comprises a transmission component, the other end of the link (2) being connected to the other end of the spring tube (1) through the transmission component.

3. The gas density meter of claim 2, wherein The transmission part comprises an end seat (6), a compensation piece (7), a transmission rod (8), a first magnetic force piece (9), a push plate (10), a second magnetic force piece (11), one end of the end seat (6) is rotatably connected with one end of the compensation piece (7), the other end of the end seat (6) is rotatably connected with the other end of the spring tube (1); the other end of the compensation piece (7) is rotatably connected with one end of the transmission rod (8); the first magnetic force piece (9) is arranged at the other end of the transmission rod (8); the push plate (10) is connected with the other end of the connecting rod (2); the second magnetic force piece (11) is arranged on the other side of the push plate (10) relative to the first magnetic force piece (9), so that the first magnetic force piece (9) and the second magnetic force piece (11) are located on the two sides of the push plate (10) respectively; under normal working conditions, the density of the to-be-measured gas in the external electrical equipment rises, the other end of the spring tube (1) moves, drives the compensation piece (7) to rotate through the end seat (6), and then drives the first magnetic force piece (9) on the transmission rod (8) to rotate towards the push plate (10), so that the first magnetic force piece (9) attracts the push plate (10) to rotate and drives the first indicator (3) to rotate away from the observation window (41) through the connecting rod (2), and the second indicator (5) is displayed in the observation window (41); under abnormal working conditions, the density of the to-be-measured gas in the external electrical equipment decreases, the other end of the spring tube (1) moves reversely, drives the compensation piece (7) to rotate reversely through the end seat (6), and then drives the first magnetic force piece (9) on the transmission rod (8) to rotate away from the push plate (10), so that the second magnetic force piece (11) attracts the push plate (10) to rotate and drives the first indicator (3) to move to the observation window (41) through the connecting rod (2), so that the second indicator (5) is blocked by the first indicator (3), and then the first indicator (3) is displayed in the observation window (41).

4. The gas density meter of claim 3, wherein The gas density table further comprises a first limiting rod (12) and a second limiting rod (13), under normal working conditions, the transmission rod (8) drives the first magnetic force piece (9) to rotate towards the direction close to the push plate (10), so that the first magnetic force piece (9) attracts the push plate (10) to rotate and drives the first indicator (3) to rotate away from the observation window (41) through the connecting rod (2), when the transmission rod (8) contacts with the first limiting rod (12), the first limiting rod (12) limits the transmission rod (8), and the second indicator (5) is displayed in the observation window (41); under abnormal working conditions, when the second magnetic force piece (11) attracts the push plate (10) to rotate and drives the first indicator (3) to move to the observation window (41) through the connecting rod (2), the connecting rod (2) contacts with the second limiting rod (13), the second limiting rod (13) limits the connecting rod (2), so that the second indicator (5) is blocked by the first indicator (3), and the first indicator (3) is displayed in the observation window (41).

5. The gas density meter of claim 2, wherein, The transmission component comprises an end seat (6), a compensation piece (7), a transmission rod (8), a push rod (14), a sliding plate (15), and a spring (17), one end of the end seat (6) is rotationally connected with one end of the compensation piece (7), the other end of the end seat (6) is rotationally connected with the other end of the spring tube (1); the other end of the compensation piece (7) is rotationally connected with one end of the transmission rod (8); the push rod (14) is arranged at the other end of the transmission rod (8); the sliding plate (15) is connected with the push rod (14); a long strip-shaped sliding groove is arranged on the sliding plate (15), a sliding block (16) is arranged in the long strip-shaped sliding groove; one end of the sliding block (16) is connected with the spring (17), and the other end of the sliding block (16) is connected with the other end of the connecting rod (2); the push rod (14) is provided with a first limiting column (141) and a second limiting column (142), one end of the first limiting column (141) and the second limiting column (142) is arranged on the push rod (14) respectively, and the other end of the first limiting column (141) and the second limiting column (142) is arranged in the long strip-shaped sliding groove respectively; under normal working conditions, the density of the to-be-measured gas in the external electrical equipment rises, the other end of the spring tube (1) moves, the end seat (6) drives the compensation piece (7) to rotate, and then drives the transmission rod (8) to rotate, so that the sliding block (16) slides in the long strip-shaped sliding groove under the pushing force of the first limiting column (141) through the spring (17), and then drives the connecting rod (2) to rotate and drives the first indicator (3) to rotate away from the observation window (41), when the sliding block (16) slides to the second limiting column (142), the second limiting column (142) limits the sliding block (16), and the second indicator (5) is displayed in the observation window (41); under abnormal working conditions, the density of the to-be-measured gas in the external electrical equipment decreases, the other end of the spring tube (1) moves reversely, the end seat (6) drives the compensation piece (7) to rotate reversely, and then drives the transmission rod (8) to rotate reversely, so that the sliding block (16) reversely slides in the long strip-shaped sliding groove under the pushing force of the second limiting column (142) through the spring (17), and then drives the connecting rod (2) to rotate and drives the first indicator (3) to move to the observation window (41), the first limiting column (141) limits the sliding block (16), so that the second indicator (5) is shielded by the first indicator (3), and then the first indicator (3) is displayed in the observation window (41).

6. The gas density meter of claim 1, wherein The gas density gauge further comprises a base (18), one end of the base (18) is connected with the external electrical equipment, and a gas passage (181) is formed in the base (18) and extends to one end of the base (18) so that the gas passage (181) is communicated with the external electrical equipment to be tested.

7. The gas density meter of claim 6, wherein An installation hole is arranged on the base (18), the installation hole is communicated with the gas passage (181), and one end of the spring tube (1) is connected with the gas passage (181) through the installation hole.

8. The gas density meter of claim 2, wherein, The gas density gauge further comprises a dial plate (4), and the observation window (41) is arranged on the dial plate (4).

9. The gas density meter of claim 8, wherein, The gas density gauge further comprises a dial cover (19) and a dial shell (20), the dial cover (19) is arranged at an open end of the dial shell (20), an inner cavity is formed between the dial cover (19) and the dial shell (20), the spring tube (1), the connecting rod (2), the first indicator (3), the second indicator (5), the dial plate (4) and the transmission component are arranged in the inner cavity, and a dial glass (191) is arranged on the dial cover (19).

10. The gas density meter of claim 9, wherein, A sealing ring (21) is arranged between the dial glass (191) and the dial shell (20).

Images