Pressure gauge
By designing a pressure gauge including a case and a gem bearing movement, the problem of insufficient sealing of the existing pressure gauge is solved, high-precision pressure measurement and corrosion resistance are achieved, and service life is extended.
Patent Information
- Application Number
- CN202421845268.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The existing pressure gauge is insufficient in sealing design and is susceptible to environmental factors, resulting in excessive aging, reduced service life and measurement accuracy.
A pressure gauge including a watch case and a gem bearing movement was designed. The watch case consists of a front case and a rear cover. A hollow chamber is provided inside the front case for installing the gem bearing movement. The back cover is closely connected to the front case through a connecting ring and an expansion ring to form a good sealing property. It is made of a mixed material of phenolic resin and reinforced glass fiber, which is corrosion-resistant.
Through the firm connection structure and corrosion-resistant materials, the overall structure of the pressure gauge is ensured to be stable and reliable, the good sealing of the internal chamber is maintained, the high accuracy of pressure measurement is ensured, and the service life is improved.
Smart Images
Figure CN222912965U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure gauges, and specifically relates to a pressure gauge. Background Art
[0002] A pressure gauge refers to an instrument that uses atmospheric pressure as a reference and is used to measure pressures greater than atmospheric pressure. It is mainly used for the pressure measurement of liquids, gases, and steam.
[0003] The existing pressure gauges have deficiencies in seal design. When in use, since they are fixed in the measurement environment for a long time, they will be eroded by environmental factors, which has a corrosive effect on the pressure gauges, resulting in excessive aging, reduced service life, decreased sealing performance of the pressure gauges, and affected measurement accuracy.
[0004] In view of this, we propose a pressure gauge to solve the existing problems. Content of the Utility Model
[0005] The purpose of the utility model is to provide a pressure gauge to solve the problems raised in the above background art.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A pressure gauge includes a case and a jewel bearing movement for pressure measurement. The case includes a front case and a rear cover. The inner part of the rear end of the front case is provided with a hollow chamber for installing the jewel bearing movement. The rear end of the front case also has an opening communicating with the chamber. The open end of the front case is detachably connected to the rear cover for closing the chamber. The bottom wall of the chamber has a through hole. The front end of the case is installed with a dial plate, and the dial plate passes through the through hole and is in transmission connection with the jewel movement. The case has mounting holes, and a connection valve for inputting a pressure source is fixedly installed in the mounting holes.
[0007] Preferably, a protruding connection ring is provided on the end face of the rear cover facing the opening of the front case. The contour of the connection ring coincides with the contour of the inner wall of the chamber, and there is an interference fit between the connection ring and the inner wall of the chamber.
[0008] Preferably, a plurality of first connection holes are provided on the bottom wall of the front case at the open end. The first connection holes are provided with internal threads. The outer edge of the end face of the rear cover is provided with an extension ring extending horizontally outward from the end face. A plurality of third connection holes corresponding to the first connection holes are provided on the extension ring. The third connection holes and the first connection holes on the front case are connected by fasteners, and the fasteners pass through the third connection holes and are screwed into the internal threads of the first connection holes.
[0009] Preferably, a sealing ring is provided on one end face of the open end of the front case. When the rear cover is tightly connected to the front case, the extension ring of the rear cover compresses the sealing ring to fill the gap between the rear cover and the front case.
[0010] Preferably, a plurality of fixing grooves are provided on the side wall of the front shell, and a plurality of bosses corresponding to the fixing grooves in position and protruding from the bottom wall are provided on the bottom wall of the open end of the front shell. A through second connection hole is provided between the fixing groove and the boss.
[0011] Preferably, an annular clamping groove is provided on the inner wall of the front end of the front shell, and a transparent watch cover is clamped to the front shell through the clamping groove. The dial is installed between the front shell and the transparent watch cover.
[0012] Preferably, an interference fit is provided between the clamping groove and the transparent watch cover, and an adhesive is filled between the transparent watch cover and the clamping groove to enhance the connection strength between the transparent watch cover and the front shell.
[0013] Preferably, the connection valve includes a threaded rod and a channel provided at the center of the axis of the threaded rod. The threaded rod is tightly connected to the mounting hole. One end of the channel communicates with the inside of the chamber, and the other end penetrates through the threaded rod and extends to the outside of the pressure gauge for connecting an external pressure source.
[0014] Preferably, the mounting hole is opened at the bottom of the front shell or the rear cover, and internal threads are provided on the inner wall of the mounting hole.
[0015] Preferably, the front shell and the rear cover are made of a mixed material of phenolic resin and reinforced fiberglass.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the firm connection between various components such as the front shell, the rear cover, the mirror transparent watch cover, the internal instrument assembly, and the dial, the overall structure of the pressure gauge is stable and reliable, ensuring good sealing of the internal chamber of the pressure gauge. The jewel bearing movement, as a precise transmission element, guarantees high-precision pressure measurement. At the same time, the rear cover and the front shell are made of phenolic resin material, which has corrosion resistance and improves the service life of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;
[0018] Figure 2 is a three-dimensional structure schematic diagram of the connection structure between the front shell and the rear cover of the present utility model;
[0019] Figure 3 is a front view of the structure of the front shell and the dial of the present utility model;
[0020] Figure 4 is a three-dimensional structure schematic diagram of the front shell of the present utility model;
[0021] Figure 5 is a three-dimensional structure schematic diagram of the rear cover of the present utility model;
[0022] Figure 6This is a three-dimensional schematic diagram of another connection structure for the connection valve, front shell, and rear cover of the present utility model.
[0023] In the figure: 1. Front shell; 11. Fixed groove; 12. Boss; 13. Card slot; 14. First connection hole; 15. Second connection hole; 16. Chamber; 17. Mounting hole; 2. Connection valve; 21. Threaded rod; 22. Channel; 3. Rear cover; 31. Connection ring; 32. Expansion ring; 33. Third connection hole; 4. Dial. Specific embodiments
[0024] The technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0025] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, a pressure gauge proposed by the present utility model includes a case and a gem bearing movement for pressure measurement. The case includes a front shell 1 and a rear cover 3. Inside the rear end of the front shell 1, there is a hollow chamber 16 for installing the gem bearing movement. The rear end of the front shell 1 also has an opening communicating with the chamber 16. The open end of the front shell 1 is detachably connected to the rear cover 3 for closing the chamber 16. The bottom wall of the chamber 16 has a through hole. A dial 4 is installed at the front end of the case, and the dial 4 passes through the through hole and is in transmission connection with the gem movement. The case has a mounting hole 17, and a connection valve 2 for inputting a pressure source is fixedly installed in the mounting hole 17.
[0026] In the embodiment, a protruding connection ring 31 is provided on the end face of the rear cover 3 facing the opening of the front shell 1. The contour of the connection ring 31 coincides with the contour of the inner wall of the chamber 16, and there is an interference fit between the connection ring 31 and the inner wall of the chamber 16.
[0027] In the embodiment, several first connection holes 14 are provided on the bottom wall of the front shell 1 at the open end. Internal threads are provided in the first connection holes 14. An expansion ring 32 extending horizontally outward from the end face is provided on the outer edge of the end face of the rear cover 3. Several third connection holes 33 corresponding to the first connection holes 14 are provided on the expansion ring 32. The third connection holes 33 and the first connection holes 14 on the front shell 1 are connected by fasteners. The fasteners pass through the third connection holes 33 and are screwed into the internal threads of the first connection holes 14.
[0028] In the embodiment, a sealing ring is provided on one end face of the open end of the front shell 1. When the rear cover 3 is tightly connected to the front shell 1, the expansion ring 32 of the rear cover 3 compresses the sealing ring to fill the gap between the rear cover 3 and the front shell 1, so as to enhance the sealing effect of the connection between the rear cover 3 and the front shell 1.
[0029] In an embodiment, a plurality of fixing grooves 11 are provided on the side wall of the front shell 1, and a plurality of bosses 12 are provided on the bottom wall of the open end of the front shell 1, the positions of which correspond to the fixing grooves 11 and protrude from the bottom wall. A through second connection hole 15 is provided between the fixing groove 11 and the boss 12 for installing and fixing a pressure gauge.
[0030] In an embodiment, an annular clamping groove 13 is provided on the inner wall of the front end of the front shell 1, and a transparent watch cover is clamped to the front shell 1 through the clamping groove 13, and the dial 4 is installed between the front shell 1 and the transparent watch cover.
[0031] In an embodiment, an interference fit is provided between the clamping groove 13 and the transparent watch cover, and an adhesive is filled between the transparent watch cover and the clamping groove 13 to enhance the connection strength between the transparent watch cover and the front shell 1.
[0032] In an embodiment, the connection valve 2 includes a threaded rod 21 and a channel 22 provided at the center of the axis of the threaded rod 21. The threaded rod 21 is tightly connected to the mounting hole 17. One end of the channel 22 communicates with the inside of the chamber 16, and the other end penetrates through the threaded rod 21 and extends to the outside of the pressure gauge for connecting an external pressure source.
[0033] In an embodiment, the mounting hole 17 is provided at the bottom of the front shell 1 or the rear cover 3, and internal threads are provided on the inner wall of the mounting hole 17.
[0034] In an embodiment, the front shell 1 and the rear cover 3 are made of a composite material of phenolic resin and reinforced fiberglass, having corrosion resistance.
[0035] Specifically, the materials used for the front shell 1 and the rear cover 3 are composite materials (abbreviated as PBT materials) formed by mixing phenolic resin with 40% reinforced fiberglass, having corrosion resistance.
[0036] Example 1, as Figure 2 、 Figure 4As shown, the mounting hole 17 is arranged at the bottom of the front shell 1, and the internal thread interface of the mounting hole 17 is parallel to the dial 4, so that the pressure gauge and the connecting valve 2 are installed in a radial structure. The pressure gauge with a radial connection structure is suitable for the use scenario that requires direct installation and the pressure source is perpendicular to the dial 4. The pressure gauge is mainly composed of the front shell 1, the back cover 3, the dial 4, the jewel bearing movement, and the connecting valve 2. The front shell 1 is provided with a hollow chamber 16 for installing the jewel bearing movement. The rear end opening of the front shell 1 is closed by the detachable back cover 3 to form a sealed environment. The front end of the front shell 1 is installed with a dial 4 for displaying the pressure value. The dial 4 is connected to the jewel bearing movement through the hole with a high-precision structure, so that the dial 4 can accurately transmit the pressure change. The back cover 3 has an interference fit with the inner wall of the chamber 16 of the front shell 1 through the connecting ring 31 on its end face, thereby closing the chamber 16 and ensuring the sealing of the chamber 16. The expansion ring 32 of the back cover 3 and the bottom wall of the opening end of the front shell 1 are connected by fasteners, such as self-tapping The connection is made by bolts, which further strengthens the connection structure between the back cover 3 and the front shell 1 to prevent the back cover 3 from falling off. When the connecting valve 2 is connected to an external pressure source, the pressure enters the chamber 16 inside the front shell 1 through the channel 22 of the connecting valve 2, and acts on the jewel bearing movement. The jewel bearing movement, as a precise pressure sensing element, transmits the sensed pressure change to the dial 4 through a high-precision connection structure. After the dial 4 receives the pressure signal from the jewel bearing movement, the pressure value is visualized through the dial 4 and the pointer. A transparent cover is provided at the front end of the front shell 1 to protect the dial 4 from the external environment. The transparent cover is fixed to the front shell 1 by a slot 13 and an adhesive to ensure the sealing and stability of the connection.
[0037] Embodiment 2, as Figure 6 As shown, the mounting hole 17 is arranged on the back cover 3, so that the internal thread interface of the mounting hole 17 is perpendicular to the dial 4, so that the pressure gauge and the connecting valve 2 are connected in an axial structure. The axially connected pressure gauge is suitable for the use scenario where the pressure source is parallel to the dial 4, and the working principle of the pressure gauge is the same as that in Example 1.
[0038] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.
Claims
1. A pressure gauge, comprising a case and a jewel bearing movement for pressure measurement, characterized in that: The watch case comprises a front case (1) and a back cover (3); a hollow chamber (16) for mounting a jewel bearing movement is provided inside the rear end of the front case (1); the rear end of the front case (1) has an opening connected to the chamber (16); the open end of the front case (1) is detachably connected to the back cover (3) for sealing the chamber (16); the bottom wall of the chamber (16) has a through hole; a dial (4) is mounted on the front end of the housing; the dial (4) is connected to the jewel movement through the through hole; the watch case has a mounting hole (17); a connecting valve (2) for inputting a pressure source is fixedly mounted in the mounting hole (17).
2. A pressure gauge according to claim 1, characterized in that: A protruding connecting ring (31) is provided on the end surface of the rear cover (3) on the opening side facing the front shell (1); the contour of the connecting ring (31) matches the contour of the inner wall of the chamber (16); and there is an interference fit between the connecting ring (31) and the inner wall of the chamber (16).
3. A pressure gauge according to claim 2, characterized in that: The front shell (1) is provided with a plurality of first connection holes (14) on the bottom wall at the open end, and the first connection holes (14) are provided with internal threads. The outer edge of the end surface of the rear cover (3) is provided with an expansion ring (32) extending outwardly from the end surface horizontally, and the expansion ring (32) is provided with a plurality of third connection holes (33) corresponding to the first connection holes (14). The third connection holes (33) are connected to the first connection holes (14) on the front shell (1) by fasteners, and the fasteners pass through the third connection holes (33) and are screwed into the internal threads of the first connection holes (14).
4. A pressure gauge according to claim 3, characterized in that: A sealing ring is provided on one end surface of the opening end of the front shell (1); when the rear cover (3) is tightly connected to the front shell (1), the expansion ring (32) of the rear cover (3) compresses the sealing ring to fill the gap between the rear cover (3) and the front shell (1).
5. A pressure gauge according to claim 1, characterized in that: The side wall of the front shell (1) is provided with a plurality of fixing grooves (11), the bottom wall of the open end of the front shell (1) is provided with a plurality of bosses (12) whose positions correspond to the fixing grooves (11) and protrude from the bottom wall, and a second connecting hole (15) is provided between the fixing grooves (11) and the bosses (12).
6. A pressure gauge according to claim 1, characterized in that: An annular clamping groove (13) is provided on the inner wall of the front end of the front shell (1), and the front shell (1) is clamped with a transparent cover via the clamping groove (13), and the dial (4) is installed between the front shell (1) and the transparent cover.
7. A pressure gauge according to claim 6, characterized in that: The card slot (13) and the transparent cover are interference-fitted, and adhesive is filled between the transparent cover and the card slot (13) to enhance the connection strength between the transparent cover and the front shell (1).
8. A pressure gauge according to claim 1, characterized in that: The connecting valve (2) comprises a threaded rod (21) and a channel (22) arranged at the center of the axis of the threaded rod (21); the threaded rod (21) is tightly connected to the mounting hole (17); one end of the channel (22) is connected to the interior of the chamber (16); the other end passes through the threaded rod (21) and extends to the outside of the pressure gauge, for connecting to an external pressure source.
9. A pressure gauge according to claim 1, characterized in that: The mounting hole (17) is formed at the bottom of the front shell (1) or the rear cover (3), and an internal thread is provided on the inner wall of the mounting hole (17).
10. A pressure gauge according to any one of claims 1 to 9, characterized in that: The front shell (1) and the rear cover (3) are made of a mixed material of phenolic resin and reinforced glass fiber.