Pressure gauge with demisting device
By designing a rotating ring and a defogging component in the pressure gauge, and using a defogging brush to clean the water mist from the glass cover, the problem of fog droplets affecting observation is solved, achieving a fast and accurate defogging effect while avoiding pointer interference, resulting in a reasonable structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SAITU INSTR JIANGSU CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-05-15
AI Technical Summary
Existing pressure gauges are prone to fogging on the glass surface when the temperature changes or the humidity is high, which affects the accuracy of numerical observation. Furthermore, existing defogging devices may interfere with the pointer, leading to inaccurate measurements.
A pressure gauge with a defogging device was designed, including a rotating ring and a defogging assembly. The defogging brush cleans water mist from the inner side of the glass cover. The position of the slider and the defogging brush is controlled by a limiting component to avoid interference with the pointer. The structure is ingenious and reasonable, and the defogging is quick and efficient.
It enables the rapid and effective removal of fog from the glass surface without interfering with the pointer's direction, ensuring the accuracy of numerical observations. Furthermore, the defogging brush separates from the glass when not in use, allowing it to air dry naturally and avoid affecting subsequent observations.
Smart Images
Figure CN224247204U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a pressure gauge, and more particularly to a pressure gauge with a demisting device. Background Technology
[0002] During prolonged use, the temperature and humidity of the operating environment for pressure gauges are not constant. When the temperature changes significantly or the ambient humidity is too high, fogging can easily form on the glass inside the gauge housing. This fogging makes it difficult for operators to see the pointer's position, thus affecting the accuracy of the observed values. Furthermore, once the fogging dries, it forms scale on the glass, reducing its transparency and also affecting subsequent observations. Therefore, it is necessary to improve the structure of the pressure gauge to solve these problems.
[0003] Chinese Patent No. CN 213688776 U discloses a pressure gauge with an endoscope surface that can be blown away. The technical solution includes a gauge box and a blowing device installed inside the gauge box. The gauge box includes a box body and a glass cover plate installed on the opening of the box body. A support ring is fixedly installed on the box body, and the glass cover plate is fixedly installed on the support ring. The blowing device includes a fixed frame fixedly installed on the inner side wall of the box body, a rotating frame rotatably installed on the fixed frame, and a blowing pipe installed on the side wall of the box body. The rotating frame includes several turbine blades rotatably engaged on the fixed frame. The turbine blades are slidably arranged on the fixed frame in an inclined state. The blowing pipe is arranged along the normal direction of the turbine blades. High-pressure gas is injected into the box body through the blowing pipe. The high-pressure gas drives the turbine blades to rotate relative to the fixed frame. At the same time, the high-pressure gas can be blown along the turbine blades to the glass cover plate to blow away the droplets on the glass cover plate. While this technical solution can effectively defog the glass cover, it achieves this effect by introducing high-pressure gas into the box. The high-pressure gas flows inside the box, creating wind. This wind inevitably interferes with the pointer, causing it to shake or even deviate from its original position, resulting in inaccurate measurement results. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a pressure gauge with a defogging device that is ingeniously designed, quick and efficient in defogging operation, and does not interfere with the accuracy of the pointer.
[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:
[0006] A pressure gauge with a defogging device includes a dial body and a defogging device installed inside the dial body. The dial body includes a housing with an open end, a glass cover plate installed at the open end of the housing, and a pressure cap. The glass cover plate is pressed and fixed to the housing by the pressure cap. The defogging device includes a rotating ring and a defogging assembly installed on the rotating ring. The rotating ring is coaxially arranged with the glass cover plate and is rotatably installed inside the housing. The defogging assembly is fixed to the rotating ring in a circumferential direction. The defogging assembly includes a defogging brush for cleaning water mist from the inner surface of the glass cover plate.
[0007] Furthermore, the defogging assembly also includes a slider, which is circumferentially fixed relative to the rotating ring and slidably engaged along the axial direction of the rotating ring. The defogging brush is mounted on the slider, and the slider is connected to a limiting assembly, which is used to control the movement of the slider.
[0008] Furthermore, the limiting component includes a protrusion fixed to the slider, a limiting guide rail fixed to the inner side wall of the housing, and a return spring connecting the slider and the rotating ring. The limiting guide rail is a V-shaped guide rail with high ends and low middle. The protrusion is an inverted V-shaped structure with low ends and high middle. The positions of both ends of the protrusion are lower than the positions of both ends of the limiting guide rail. The rotation of the rotating ring can drive the protrusion to move along the limiting guide rail, thereby driving the slider to move up and down. After the protrusion disengages from the limiting guide rail, the slider is reset by the return spring.
[0009] Furthermore, a relief groove extending axially is provided through the side wall of the rotating ring at the position corresponding to the protrusion, and one end of the protrusion extends through the relief groove to the outside of the rotating ring.
[0010] Furthermore, the rotating ring is connected to the driving component via a transmission assembly, and the driving component drives the rotating ring to rotate or stop via the transmission assembly.
[0011] Furthermore, a bevel gear ring is fixedly provided on the outer wall of the rotating ring, and the transmission assembly includes a transmission wheel and a transmission shaft with one end fixedly connected to the transmission wheel. The transmission wheel is meshed with the bevel gear ring, and the other end of the transmission shaft passes through the side wall of the housing and is fixedly connected to the output end of the drive component.
[0012] Furthermore, a groove is provided on the rotating ring corresponding to the position of the slider. The groove extends along the axial direction of the rotating ring. The slider is slidably connected in the groove. A retaining groove is provided on both sides of the groove. A matching retaining block is provided at the corresponding position on both sides of the slider. The retaining block is located in the retaining groove. When the slider slides along the groove, the retaining block slides synchronously in the retaining groove.
[0013] Furthermore, a limiting ring is provided on the upper part of the housing, the inner diameter of the limiting ring is smaller than the inner diameter of the rotating ring, and the glass cover is located between the limiting ring and the pressure cap.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a defogging component to defog the glass cover, avoiding the inability to accurately observe values due to fog obstruction; by setting a limiting component to control the position of the slider and the defogging brush, the defogging brush is separated from the glass cover when not in use, which is conducive to the natural drying of the defogging brush and the normal operation of subsequent defogging work; the overall structure is ingeniously and reasonably designed, defogging is quick and efficient, and will not interfere with the pointer's direction. Attached Figure Description
[0015] Figure 1 This is a perspective view of a pressure gauge with a demisting device according to the present invention;
[0016] Figure 2 This is an exploded view of a pressure gauge with a demisting device according to the present invention.
[0017] Figure 3 for Figure 2 A magnified view of the structure at point B in the middle;
[0018] Figure 4 This is a front view of a pressure gauge with a demisting device according to the present invention.
[0019] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure cut along line AA.
[0020] The components include: 1. Housing; 11. Through hole; 12. Limiting ring; 13. Limiting guide rail; 2. Pressure cap; 3. Pointer; 4. Scale display dial; 5. Rotating ring; 51. Slide groove; 511. Relief groove; 512. Slot; 52. Bevel gear ring; 6. Defogging assembly; 61. Defogging brush; 62. Slider; 621. Locking block; 63. Protrusion; 7. Transmission assembly; 71. Transmission wheel; 72. Transmission shaft; 8. Glass cover plate; 9. Return spring. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0022] It should be noted that in the description of the technical solution of this utility model, some directional terms used to clearly describe the technical features of this utility model, such as "front", "rear", "upper", "lower", "top", "bottom", "inner", and "outer", are all in accordance with the orientation of the accompanying drawings of this utility model.
[0023] Example
[0024] like Figure 1 , Figure 2 and Figure 4As shown in the figure, a pressure gauge with a defogging device according to this embodiment includes a dial body and a defogging device installed inside the dial body. The dial body includes a housing 1 with an open end, a glass cover plate 8 installed at the open end of the housing 1, and a gland 2. The glass cover plate 8 is tightly fixed to the housing 1 through the gland 2. Specifically, a pointer 3 is rotatably provided inside the housing 1. The specific rotation method is prior art and will not be elaborated here. A scale display disk 4 is provided between the pointer 3 and the bottom surface of the housing 1. During the use of the pressure gauge, the position of the scale display disk 4 pointed to by the pointer 3 represents the current pressure value. A limiting ring 12 is provided on the upper part of the housing 1. The outer ring of the limiting ring 12 is fixed on the inner wall of the housing 1. The glass cover plate 8 is located between the limiting ring 12 and the gland 2. The gland 2 is threadedly connected to the housing 1 and tightly fixes the glass cover plate 8 between the limiting ring 12 and the gland 2. The glass cover plate 8 is made of transparent glass to facilitate the staff to observe the value pointed to by the pointer 3.
[0025] The defogging device includes a rotating ring 5 and a fog-clearing component 6 installed on the rotating ring 5. The rotating ring 5 is coaxially arranged with the glass cover plate 8 and is rotatably installed inside the housing 1. Specifically, in this embodiment, the inner diameter of the limiting ring 12 is smaller than the inner diameter of the rotating ring 5, and the distance between the limiting ring 12 and the bottom surface of the housing 1 is adapted to the height of the rotating ring 5. The rotating ring 5 is rotatably clamped between the limiting ring 12 and the bottom surface of the housing 1. In a specific implementation manner, the lower surface of the rotating ring 5 is in contact with the bottom surface of the housing 1. A circular groove is formed in the circumferential direction on the bottom surface of the housing 1. A protrusion cooperating with the groove is convexly provided on the lower surface of the rotating ring 5. The protrusion is inserted into the groove and can slide along the groove. When the rotating ring 5 rotates, the protrusion slides along the groove. Further, the cross-section of the groove is generally a "convex" shape structure, and the protrusion matches the groove. In this way, while enabling the protrusion to slide along the groove, it also ensures that the protrusion and the groove will not easily separate.
[0026] The rotating ring 5 is connected to the driving component via a transmission assembly 7. The driving component is a drive motor or other existing device capable of driving the transmission assembly 7 to rotate. The driving component drives the rotating ring 5 to rotate or stop via the transmission assembly 7. Specifically, a bevel gear ring 52 is fixedly mounted on the outer wall of the rotating ring 5. The transmission assembly 7 includes a transmission wheel 71 and a transmission shaft 72 with one end fixedly connected to the transmission wheel 71. The transmission wheel 71 is a bevel gear, and it meshes with the bevel gear ring 52. The other end of the transmission shaft 72 passes through the side wall of the housing 1 and is fixedly connected to the output end of the driving component. A through hole 11 is provided on the side wall of the housing 1 for the transmission shaft 72 to pass through, and the transmission shaft 72 is rotatably mounted in the through hole 11 via a bearing. When the driving component drives the transmission shaft 72 to rotate, the transmission shaft 72 drives the transmission wheel 71 to rotate, which in turn drives the bevel gear ring 52 to rotate through the meshing transmission connection, thereby causing the rotating ring 5 to rotate accordingly. In this embodiment, the driving component is a micro motor mounted on the outer wall of the housing 1. The body of the micro motor is fixedly connected to the housing 1, and the output shaft of the micro motor is fixedly connected to the transmission shaft 72. In addition, a sealing ring (e.g., a silicone ring or a rubber ring) is provided between the transmission shaft 72 and the through hole 11 to achieve sealing at the connection.
[0027] like Figure 3 and Figure 5 As shown, the defogging assembly 6 and the rotating ring 5 are fixed circumferentially relative to each other. The defogging assembly 6 includes a defogging brush 61 for cleaning water mist from the inner surface of the glass cover plate 8. The defogging assembly 6 also includes a slider 62, which is fixed circumferentially relative to the rotating ring 5 and slides along the axial direction of the rotating ring 5. The defogging brush 61 is mounted on the slider 62, and the slider 62 is connected to a limiting assembly for controlling the movement of the slider 62. Specifically, in this embodiment, a groove 51 is provided on the rotating ring 5 at the position corresponding to the slider 62. The groove 51 extends along the axial direction of the rotating ring 5. The slider 62 is slidably connected in the groove 51. The two sides of the groove 51 are respectively provided with recessed slots 512. The two sides of the slider 62 are provided with corresponding protruding locking blocks 621. The locking blocks 621 are located in the slots 512. When the slider 62 slides along the groove 51, the locking blocks 621 slide synchronously within the slots 512. In this embodiment, a groove 51 is provided to guide the slider 62 and restrict the slider 62's degree of freedom along the circumferential direction of the rotating ring 5; a locking block 621 is provided to cooperate with the groove 512 to restrict the slider 62's degree of freedom along the radial direction of the rotating ring 5; ensuring that the slider 62 can only move along the axial direction of the rotating ring 5.
[0028] The limiting assembly includes a protrusion 63 fixed to the slider 62, a limiting guide rail 13 fixed to the inner side wall of the housing 1, and a return spring 9 connecting the slider 62 and the rotating ring 5. A relief groove 511 extending axially is provided on the side wall of the rotating ring 5 at a position corresponding to the protrusion 63. One end of the protrusion 63 extends through the relief groove 511 to the outside of the rotating ring 5. The height of the relief groove 511 is greater than the maximum stroke of the protrusion 63, allowing the protrusion 63 to move along the relief groove 511. In this embodiment, the limiting guide rail 13 is a V-shaped guide rail with high ends and low middle, and the protrusion 63 is an inverted V-shaped structure with low ends and high middle. The low ends of both the protrusion 63 and the limiting guide rail 13 are located on the side close to the bottom surface of the housing 1; and the positions of both ends of the protrusion 63 are lower than the positions of both ends of the limiting guide rail 13. When the rotating ring 5 rotates and drives the protrusion 63 to move to the limiting guide rail 13, the rotating ring 5 continues to rotate and can drive the protrusion 63 to move along the limiting guide rail 13. During the movement of the protrusion 63 along the limiting guide rail 13, it will undergo displacement along the axial direction of the rotating ring 5, thus driving the slider 62 to move along the axial direction of the rotating ring 5, and further driving the defogging brush 61 to move along the axial direction of the rotating ring 5. With this structure, when the protrusion 63 slides to the limiting guide rail 13, it will drive the slider 62 and the defogging brush 61 on the slider 62 to gradually move towards the bottom surface of the housing 1. With this design, when no fogging operation is required, the fogging brush 61 can be moved to a position close to the bottom surface of the housing 1, so as to avoid it being stuck to the glass cover plate 8 for a long time, which would affect the evaporation efficiency of the fog droplets it carries, or even cause the fogging brush 61 to become moldy.
[0029] In this embodiment, one end of the return spring 9 is fixed to the bottom of the slide groove 51, and the other end is fixed to the slider 62. The return spring 9 is used to support the slider 62, so that the defogging brush 61 installed on the slider 62 can always be in contact with the glass cover plate 8 in the defogging state. When the protrusion 63 disengages from the limiting guide rail 13, the slider 62 is reset by the return spring 9.
[0030] Initially, protrusion 63 is located at the lowest end of the limiting guide rail 13, and the defogging brush 61 is positioned near the bottom surface of the housing 1. When fog droplets appear on the inner surface of the pressure gauge's glass cover 8, affecting the operator's observation, the drive unit is activated. This drives the rotating ring 5 to rotate via the transmission assembly 7, which in turn moves the defogging brush 61 mounted on the rotating ring 5 circumferentially along the glass cover 8, cleaning the fog droplets on the inner surface of the glass cover 8 until the operator can easily observe the pressure gauge reading. Then, the rotating ring 5 continues to rotate until protrusion 63 moves to the lowest end of the limiting guide rail 13, resetting and completing the defogging operation.
[0031] This utility model discloses a pressure gauge with a defogging device. By setting a defogging component 6 to defog the glass cover plate 8, it avoids the inability to accurately observe values due to fog obstruction. By setting a limit component to control the position of the slider 62 and the defogging brush 61, the defogging brush 61 is separated from the glass cover plate 8 when not in use, which is conducive to the natural drying of the defogging brush 61 and the normal operation of subsequent defogging work. The overall structure is ingenious and reasonable, the defogging is quick and efficient, and it does not interfere with the pointing of the pointer 3.
[0032] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.
Claims
1. A pressure gauge with a demister, characterized in that: The watch includes a dial body and a defogging device installed inside the dial body. The dial body includes a housing (1) with an open end, a glass cover (8) installed at the open end of the housing (1), and a pressure cover (2). The glass cover (8) is pressed and fixed to the housing (1) by the pressure cover (2). The defogging device includes a rotating ring (5) and a defogging assembly (6) installed on the rotating ring (5). The rotating ring (5) is coaxially arranged with the glass cover (8), and the rotating ring (5) is rotatably installed inside the housing (1). The defogging assembly (6) is fixed to the rotating ring (5) in a circumferential direction. The defogging assembly (6) includes a defogging brush (61) for cleaning water mist on the inner side of the glass cover (8).
2. A pressure gauge with a demister device according to claim 1, characterized in that: The fog clearing component (6) also includes a slider (62), which is circumferentially fixed to the rotating ring (5) and slides along the axial direction of the rotating ring (5). The fog clearing brush (61) is mounted on the slider (62), and the slider (62) is connected to a limiting component, which is used to control the movement of the slider (62).
3. A pressure gauge with a demisting device according to claim 2, characterized in that: The limiting component includes a protrusion (63) fixed on the slider (62), a limiting guide rail (13) fixed on the inner side wall of the housing (1), and a reset spring (9) connected between the slider (62) and the rotating ring (5). The limiting guide rail (13) is a V-shaped guide rail with high ends and low middle. The protrusion (63) is an inverted V-shaped structure with low ends and high middle. The positions of both ends of the protrusion (63) are lower than the positions of both ends of the limiting guide rail (13). The rotation of the rotating ring (5) can drive the protrusion (63) to move along the limiting guide rail (13), thereby driving the slider (62) to move up and down. After the protrusion (63) disengages from the limiting guide rail (13), the slider (62) is reset by the reset spring (9).
4. A pressure gauge with a demister according to claim 3, characterized in that: A relief groove (511) extending axially is provided on the side wall of the rotating ring (5) at the position corresponding to the protrusion (63), and one end of the protrusion (63) extends through the relief groove (511) to the outside of the rotating ring (5).
5. A pressure gauge with a demister according to claim 1, characterized in that: The rotating ring (5) is connected to the driving component through the transmission assembly (7), and the driving component drives the rotating ring (5) to rotate or stop through the transmission assembly (7).
6. A pressure gauge with a demister according to claim 5, characterized in that: The outer wall of the rotating ring (5) is fixed with a bevel gear ring (52). The transmission assembly (7) includes a transmission wheel (71) and a transmission shaft (72) with one end fixed to the transmission wheel (71). The transmission wheel (71) meshes with the bevel gear ring (52). The other end of the transmission shaft (72) passes through the side wall of the housing (1) and is fixed to the output end of the drive component.
7. A pressure gauge with a demister according to claim 1, characterized in that: A groove (51) is provided on the rotating ring (5) at the position corresponding to the slider (62). The groove (51) extends along the axial direction of the rotating ring (5). The slider (62) is slidably connected in the groove (51). A slot (512) is provided on both sides of the groove (51). A matching block (621) is provided at the corresponding position on both sides of the slider (62). The block (621) is located in the slot (512). When the slider (62) slides along the groove (51), the block (621) slides synchronously in the slot (512).
8. A pressure gauge with a demister according to claim 1, characterized in that: The upper part of the housing (1) is provided with a limiting ring (12), the inner diameter of the limiting ring (12) is smaller than the inner diameter of the rotating ring (5), and the glass cover (8) is located between the limiting ring (12) and the pressure cover (2).