Shock-resistant pressure instrument

Abstract

The utility model discloses an anti-shock pressure instrument, which comprises an instrument shell and a connecting base fixedly arranged at the bottom of the instrument shell, a dial is arranged in the instrument shell, a main shaft is rotationally arranged on the dial, a pointer is fixedly connected to the end part of the main shaft, one end of the pointer points to the scales on the dial, and the other end of the pointer is fixedly connected with the connecting base. Wherein the other end of the pointer is fixedly provided with a balancing weight, one side, close to the dial, of the balancing weight is fixedly provided with a damping fin, and the scale surface of the dial is fixedly provided with a permanent magnet. And external vibration transmission can be buffered, so that the instrument can still keep relatively high measurement precision in a complex vibration environment.

Description

Technical Field

[0001] This utility model relates to the field of pressure instrument technology, and more specifically, to a shock-resistant pressure instrument. Background Technology

[0002] In industrial production, machinery manufacturing, petrochemical and other fields, pressure gauges are critical measuring devices that need to monitor pressure parameters within the system in real time to ensure the safe operation of equipment. However, these application scenarios are often accompanied by severe vibrations, such as mechanical vibrations generated by pump operation, pipeline pulsation, and equipment start-up and shutdown, which can cause traditional pressure gauges to experience problems such as severe pointer swings, decreased measurement accuracy, and even damage to components.

[0003] Existing pressure gauges' anti-vibration designs mostly focus on housing buffers or pointer damping structures, but these have significant limitations: gauges using mechanical damping (such as air damping or liquid damping) are significantly affected by temperature changes, their damping effect is easily diminished, and they have high sealing requirements and high maintenance costs.

[0004] In environments with complex vibration frequencies, pointer swing amplitude often exceeds the allowable error range, making it difficult for operators to read accurate values ​​and potentially leading to misjudgments and production accidents. Furthermore, prolonged high-frequency vibration accelerates the wear of internal transmission components, shortens service life, and increases equipment maintenance frequency and costs. Utility Model Content

[0005] This invention addresses the technical problems existing in the prior art by providing a shock-resistant pressure gauge, which solves the problems of severe pointer swing, low measurement accuracy, and short service life of traditional pressure gauges under vibration.

[0006] To achieve the above objectives, this utility model provides a shock-resistant pressure gauge, including a housing and a connecting base fixedly installed at the bottom of the housing. A dial is provided inside the housing, and a main shaft is rotatably mounted on the dial. A pointer is fixedly connected to the end of the main shaft, with one end of the pointer pointing to a graduation on the dial. A counterweight is fixedly mounted at the other end of the pointer, balancing the pointer's center of gravity and reducing inertial sway caused by vibration. A damping plate is fixedly mounted on the side of the counterweight near the dial, and a permanent magnet is fixedly mounted on the graduation surface of the dial. The two work together to form an electromagnetic damping structure, which can quickly suppress pointer sway.

[0007] The beneficial effects of this utility model are:

[0008] 1. Through the action of the electromagnetic damping structure, the pointer swing can be quickly suppressed, so that the instrument can maintain high measurement accuracy even in complex vibration environments.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Preferably, the permanent magnet is semi-circular in shape and has a magnetic induction intensity of 80-120 mT.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that the semi-circular permanent magnet can be matched with the swing trajectory of the pointer, ensuring that the damping plate is always within the magnetic field range during the swing, and the magnetic induction intensity of 80-120mT can provide a stable and suitable magnetic field strength, ensuring the reliability of the electromagnetic damping effect.

[0012] Preferably, the damping sheet has a 60° fan-shaped structure and is made of brass foil with a thickness of 0.25-0.35mm by stamping. The brass foil has good conductivity and can effectively generate induced current. The gap between the damping sheet and the permanent magnet is 0.5-1mm. This gap setting can ensure the damping effect while avoiding friction between the damping sheet and the permanent magnet.

[0013] The beneficial effect of adopting the above-mentioned further solution is that when the pointer is vibrated and swings, the damping plate moves in the constant magnetic field formed by the permanent magnet, cutting the magnetic field lines. A closed induced current is generated inside the damping plate, and the eddy current generates an electromagnetic damping torque opposite to the swing direction, thereby quickly reducing the swing amplitude of the pointer and stabilizing the pointer as soon as possible.

[0014] Preferably, the watch case is fixedly connected to two lugs symmetrically arranged along the center line of the watch case, and the connecting base is symmetrically provided with bosses, the bosses and the lugs are corresponding one to one and connected by springs.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the symmetrically arranged lugs, bosses and springs can make the watch case be subjected to uniform tension, and the springs can absorb the vibration energy transmitted from the outside, reduce the impact of vibration on the internal components of the watch case, and play a role in buffering and shock absorption.

[0016] Preferably, one end of the spring is fixedly connected to the lug, and the other end of the spring is fixedly connected to a connecting ring. A screw is threaded onto the boss, and the connecting ring is rotatably sleeved on the screw. A dial is fixedly connected to the bottom of the screw. The screw is used to adjust the installation height of the other end of the spring by rotating it, so as to adjust the preload of the spring.

[0017] The beneficial effect of adopting the above-mentioned further solution is that by rotating the dial to drive the screw to rotate, the tension of the spring can be changed, thereby adjusting the preload, so that the instrument can adapt to vibration environments of different intensities.

[0018] Preferably, the watch case is covered with a metal mesh sleeve, which has high strength and can provide physical protection for the watch case, preventing external objects from impacting it; there is a buffer chamber between the metal mesh sleeve and the watch case, and the interior of the buffer chamber is filled with silicone particles.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the silicone particles have good elasticity and cushioning properties, which can further absorb external vibration energy and enhance the overall shock resistance of the instrument.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] Through the combined action of electromagnetic damping structure and spring shock absorption structure, it can quickly suppress pointer swing and buffer the transmission of external vibration, so that the instrument can maintain high measurement accuracy even in complex vibration environment.

[0022] The spring preload can be adjusted via a screw to adapt to vibration environments of varying intensities; the electromagnetic damping effect is minimally affected by temperature and can still operate stably within a temperature range of -20℃ to 80℃.

[0023] The external protective structure, composed of a metal mesh and silicone particles, reduces damage to the instrument case from external impacts; the spring damping structure reduces wear on internal components from vibrations, extending the instrument's service life. Attached Figure Description

[0024] Figure 1 This is an isometric view of one side of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the upper structure of the watch case of this utility model;

[0026] Figure 3 This is a schematic diagram of the lower part of the watch case of this utility model;

[0027] Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A;

[0028] Figure 5 This is a cross-sectional view of the metal mesh sleeve of this utility model.

[0029] The meanings of the labels in the diagram are as follows:

[0030] 1. Case; 2. Connecting base; 3. Dial; 4. Spindle; 5. Hand; 6. Counterweight; 7. Damping plate; 8. Permanent magnet; 9. Lug; 10. Boss; 11. Spring; 12. Connecting ring; 13. Screw; 14. Dial; 15. Metal mesh sleeve; 16. Buffer chamber; 17. Silicone granules. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-5 As shown, this embodiment provides a shock-resistant pressure gauge, including a housing 1 and a connecting base 2 fixedly installed at the bottom of the housing 1. A dial 3 is provided inside the housing 1, and a main shaft 4 is rotatably installed on the dial 3. A pointer 5 is fixedly connected to the end of the main shaft 4. One end of the pointer 5 points to the scale on the dial 3. A counterweight 6 is fixedly installed at the other end of the pointer 5. The counterweight 6 can balance the center of gravity of the pointer 5 and reduce the inertial sway caused by vibration. A damping plate 7 is fixedly installed on the side of the counterweight 6 near the dial 3. A permanent magnet 8 is fixedly installed on the scale surface of the dial 3.

[0033] In summary, the improvement of this embodiment lies in the fact that by setting up a damping plate 7 and a permanent magnet 8, the two work together to form an electromagnetic damping structure, which can quickly suppress the swing of the pointer 5.

[0034] Based on the above, other structures also need to be disclosed in detail, such as:

[0035] To ensure the reliability of the electromagnetic damping effect, the permanent magnet 8 is semi-circular in shape, and its magnetic flux density is 80-120 mT. The semi-circular permanent magnet 8 can be matched with the swing trajectory of the pointer 5, ensuring that the damping plate 7 remains within the magnetic field range during its swing. The magnetic flux density of 80-120 mT provides a stable and suitable magnetic field strength, ensuring the reliability of the electromagnetic damping effect.

[0036] To ensure the proper functioning of the damping plate 7, it features a 60° fan-shaped structure. The damping plate 7 is formed by stamping 0.25-0.35mm thick brass foil, which has excellent conductivity and effectively generates induced current. The gap between the damping plate 7 and the permanent magnet 8 is 0.5-1mm. This gap ensures the damping effect while preventing friction between the damping plate 7 and the permanent magnet 8. When the pointer 5 is vibrated, the damping plate 7 moves within the constant magnetic field formed by the permanent magnet 8, cutting magnetic field lines. A closed-loop induced current is generated inside the damping plate 7, and the eddy currents produce an electromagnetic damping torque opposite to the direction of the swing, thus quickly reducing the swing amplitude of the pointer 5 and stabilizing it as soon as possible.

[0037] To reduce vibrations transmitted from the connecting base 2, two lugs 9 are fixedly connected to the watch case 1, symmetrically arranged along the axis of the watch case 1. Bosses 10 are symmetrically arranged on the connecting base 2, each corresponding to a lug 9 and connected by a spring 11. The symmetrical arrangement of the lugs 9, bosses 10, and springs 11 ensures that the watch case 1 is subjected to uniform tension. The springs 11 absorb externally transmitted vibration energy, reducing the impact of vibrations on the internal components of the watch case 1 and providing a buffering and shock-absorbing effect.

[0038] To enhance the adaptability of the device, one end of the spring 11 is fixedly connected to the lug 9, and the other end of the spring 11 is fixedly connected to the connecting ring 12. The boss 10 is threaded with a screw 13, and the connecting ring 12 is rotatably sleeved on the screw 13. The bottom of the screw 13 is fixedly connected to the dial 14. The screw 13 is used to adjust the installation height of the other end of the spring 11 by rotation, so as to adjust the preload of the spring 11. By rotating the dial 14, the screw 13 can be rotated, which can change the tension of the spring 11 and thus adjust the preload, so that the instrument can adapt to vibration environments of different intensities.

[0039] To further enhance external impact protection, a metal mesh sleeve 15 is fitted over the watch case 1. The metal mesh sleeve 15 has high strength and provides physical protection for the watch case 1, preventing external objects from impacting it. A buffer chamber 16 exists between the metal mesh sleeve 15 and the watch case 1, and the buffer chamber 16 is filled with silicone particles 17. The silicone particles 17 have good elasticity and cushioning properties, further absorbing external vibration energy and enhancing the overall shock resistance of the instrument.

[0040] In summary, the working principle of this solution is as follows:

[0041] Initial state: After the instrument is installed, adjust the height of the screw 13 by rotating the dial 14 so that the spring 11 is in a suitable preload state. At this time, the case 1 remains stable under the pull of the spring 11, and the damping plate 7 and the permanent magnet 8 maintain a gap of 0.5-1mm.

[0042] Pressure measurement and vibration: When the instrument measures pressure, the main shaft 4 drives the pointer 5 to rotate, and the pointer 5 points to the corresponding scale. If external vibration occurs at this time, the vibration is transmitted to the boss 10 through the connecting base 2. The boss 10 transmits the vibration energy to the lug 9 and the case 1 through the spring 11. The spring 11 stretches and deforms during the vibration, absorbing part of the vibration energy and reducing the vibration intensity transmitted to the inside of the case 1.

[0043] The process of suppressing pointer 5 swing: If vibration causes pointer 5 to swing, pointer 5 drives counterweight 6 and damping plate 7 to swing synchronously. Damping plate 7 moves in the constant magnetic field formed by semi-circular permanent magnet 8, cutting magnetic field lines. Eddy currents are generated inside damping plate 7. The electromagnetic damping torque generated by the eddy currents is opposite to the swing direction of pointer 5, forcing the swing amplitude of pointer 5 to decrease rapidly, so that pointer 5 can quickly stabilize at the correct scale position.

[0044] External protection function: The metal mesh sleeve 15 can block the direct impact of external objects on the watch case 1. The silicone particles 17 in the buffer chamber 16 move relative to each other when vibrating, and absorb some of the vibration energy through friction and deformation, further weakening the impact of external vibration on the watch case 1.

[0045] Long-term use adjustment: After a period of use, if the preload of spring 11 changes, the height of screw 13 can be adjusted by rotating dial 14 to restore the damping effect of spring 11; if damping plate 7 is worn, a new damping plate 7 can be replaced to ensure that the electromagnetic damping structure works normally.

[0046] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shock-resistant pressure gauge, comprising a housing (1) and a connecting base (2) fixedly installed at the bottom of the housing (1), characterized in that: The inside of the case (1) is provided with a dial (3), and a main shaft (4) is rotatably mounted on the dial (3). A pointer (5) is fixedly connected to the end of the main shaft (4). One end of the pointer (5) points to the scale on the dial (3). A counterweight (6) is fixedly provided at the other end of the pointer (5). A damping plate (7) is fixedly installed on the side of the counterweight (6) near the dial (3). A permanent magnet (8) is fixedly provided on the scale surface of the dial (3).

2. The shock-resistant pressure instrument according to claim 1, characterized in that: The permanent magnet (8) is semi-circular in shape, and the magnetic induction intensity of the permanent magnet (8) is 80-120mT.

3. The shock-resistant pressure instrument according to claim 1, characterized in that: The damping plate (7) has a 60° fan-shaped structure. The damping plate (7) is formed by stamping brass foil with a thickness of 0.25-0.35mm. The gap between the damping plate (7) and the permanent magnet (8) is 0.5-1mm. When the pointer (5) is vibrated and swings, the damping plate (7) moves in the constant magnetic field formed by the permanent magnet (8) to cut the magnetic field lines. A closed induced current will be generated inside the damping plate (7), and the eddy current will generate an electromagnetic damping torque opposite to the swing direction.

4. The shock-resistant pressure instrument according to claim 1, characterized in that: The watch case (1) is fixedly connected to two lugs (9) symmetrically arranged along the axis of the watch case (1). The connecting base (2) is symmetrically provided with bosses (10). The bosses (10) correspond one-to-one with the lugs (9) and are connected by springs (11).

5. The shock-resistant pressure instrument according to claim 4, characterized in that: One end of the spring (11) is fixedly connected to the lug (9), and the other end of the spring (11) is fixedly connected to a connecting ring (12). A screw (13) is threaded onto the boss (10). The connecting ring (12) is rotatably sleeved on the screw (13). A dial (14) is fixedly connected to the bottom of the screw (13). The screw (13) is used to adjust the installation height of the other end of the spring (11) by rotation, so as to adjust the preload of the spring (11).

6. The shock-resistant pressure instrument according to claim 1, characterized in that: The watch case (1) is covered with a metal mesh sleeve (15), and there is a buffer chamber (16) between the metal mesh sleeve (15) and the watch case (1). The buffer chamber (16) is filled with silicone particles (17).

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