Shock-resistant pressure instrument

Abstract

The utility model discloses an anti-seismic pressure instrument, which belongs to the technical field of pressure gauges and comprises a shell, an instrument joint is arranged at the lower end of the shell, the upper part of the instrument joint extends into the shell and is connected with a movement frame at the end part, and a sector gear and a pointer shaft are rotatably mounted on the movement frame at intervals. The front end, extending out of the movement frame, of the pointer shaft is provided with a pointer, the rear end, extending out of the movement frame, of the pointer shaft is provided with a damping disc, the periphery of the damping disc is provided with a damping ring, the damping ring is fixed to the movement frame, and the inner wall of the damping ring is provided with a plurality of damping tongues distributed at intervals. The damping tongue centripetally extends to the free end to be embedded with the ball, the ball is in rolling contact with the annular wall of the damping disc, damping liquid is replaced, and the problems that the damping liquid needs to be replaced regularly, the meter explosion risk is caused, and the meter cannot be used in vibration environments of some industries are solved.

Description

Technical Field

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

[0002] Existing shock-resistant pressure gauges mainly achieve vibration buffering by filling with damping fluids such as glycerin and silicone oil. A few have a damping cup on the rotating shaft of the movement, and the damping cup is filled with damping fluids such as glycerin and silicone oil.

[0003] The existing technology has several drawbacks: First, filling the entire gauge with damping oil can lead to oil leakage or yellowing of the gauge base. Second, after a period of use, the oil's performance deteriorates, contamination accumulates, and thermal stability decreases, resulting in weakened damping effect, delayed pointer response, increased measurement error, and wear and corrosion of the movement, requiring periodic replacement. Third, pressure gauges with damping fluid are prohibited from use in clean environments such as food and pharmaceutical manufacturing, as well as in industries such as chemical, medical, and aerospace. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a shock-resistant pressure gauge. By incorporating a rigid damping structure at the rotating shaft of the mechanism, it replaces the use of damping fluid, thus solving the problems of needing to replace damping fluid regularly, the risk of gauge explosion, and inability to be used in vibration environments in some industries.

[0005] The technical solution of this utility model is as follows:

[0006] An anti-vibration pressure gauge includes a housing, an instrument connector at the lower end of the housing, an upper part of the instrument connector extending into the housing and connected to a mechanism frame at its end, a sector gear and a pointer shaft rotatably mounted on the mechanism frame at intervals, a central gear meshing with the sector gear mounted on the pointer shaft, and a pointer mounted on the front end of the pointer shaft extending out of the mechanism frame; a C-shaped spring tube is provided on the outer periphery of the mechanism frame, one end of the spring tube is connected to the side wall of the instrument connector, and the other end is hinged to a connecting rod, the end of the connecting rod being hinged to the non-gear end of the sector gear; a damping disc is mounted on the rear end of the pointer shaft extending out of the mechanism frame, the damping disc has a damping ring on its outer periphery, the damping ring is fixed to the mechanism frame, and the inner wall of the damping ring has several damping tongues distributed at intervals, the damping tongues extending concentrically to their free ends and embedded with balls, the balls making rolling contact with the ring wall of the damping disc.

[0007] Furthermore, the instrument connector has a longitudinal medium channel inside, one end of which extends to the bottom of the instrument connector and the other end connects to the C-shaped spring tube. The outer wall of the instrument connector has a blind hole, which is orthogonally connected to the channel. A damping screw is screwed into the blind hole, and the damping screw has a through hole that matches the channel. By rotating the damping screw, the communication area between the through hole and the channel can be adjusted.

[0008] Furthermore, the blind hole has threaded sections on the inner walls on both sides of the intersection with the channel, which are used to engage with the damping screw.

[0009] A sealing ring is fitted around the outer periphery of the damping screw. After the damping screw is screwed into the blind hole, the sealing ring fits tightly against the unthreaded section of the blind hole.

[0010] Furthermore, the outer wall of the damping disc is toothed, and the damping tongue is S-shaped. The damping tongue and the toothed damping disc are in contact through rolling balls, and the vibration energy is absorbed by elastic deformation to achieve liquid-free dry shock resistance, avoiding the risk of leakage and pollution of traditional damping fluid.

[0011] Furthermore, the outer wall of the damping disc is provided with an annular damping groove, the damping tongue is a centripetal cone, and the ball bearings are in rolling contact with the damping groove. Liquid-free shock resistance is achieved through a purely mechanical structure, breaking through the application limitations of traditional damping liquid-type shock-resistant pressure gauges.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. The damping tongue and toothed damping disc of this utility model make contact through rolling balls, achieving liquid-free shock resistance through a purely mechanical structure. This avoids leakage and contamination of traditional damping fluid and breaks through the application limitations of traditional damping fluid-type shock-resistant pressure gauges.

[0014] 2. This utility model provides a blind hole on the outer wall of the instrument connector, which is orthogonally connected to the medium channel. A damping screw is screwed into the blind hole, and the damping screw has a through hole that matches the channel. By rotating the damping screw, the communication area between the through hole and the channel can be adjusted, thus achieving adjustable damping and making the application more flexible. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the gear-shaped damping disc and S-shaped curved damping tongue structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the damping disc with damping groove and the centripetal cone damping tongue structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the instrument connector structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the damping disc structure with damping groove of this utility model.

[0020] Reference numerals: 1. Housing; 2. Instrument connector; 2-1. Blind hole; 2-2. Damping screw; 2-2.1. Through hole; 2-2.2. Sealing ring; 3. Mechanism frame; 3-1. Mounting platform; 4. Sector gear; 5. Pointer shaft; 6. Bourdon tube; 7. Connecting rod; 8. Damping disc; 8-1. Damping groove; 9. Damping ring; 9-1. Damping tongue; 9-2. Ball bearing; 10. Center gear. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1: A shock-resistant pressure gauge includes a housing 1, an instrument connector 2 at the lower end of the housing, an upper part of the instrument connector extending into the housing 1 and connected to a core frame 3 at the end, a sector gear 4 and a pointer shaft 5 rotatably mounted on the core frame 3 at intervals, a central gear 10 meshing with the sector gear 4 mounted on the pointer shaft, and a pointer (not shown in the figure) mounted on the front end of the pointer shaft 5 extending out of the core frame 3; a C-shaped spring tube 6 is provided on the outer periphery of the core frame 3, one end of the spring tube is connected to the side wall of the instrument connector 2, and the other end is hinged to a connecting rod 7, the end of the connecting rod being hinged to the non-gear end of the sector gear 4; a damping disc 8 is mounted on the rear end of the pointer shaft 5 extending out of the core frame 5, a damping ring 9 is provided on the outer periphery of the damping disc, the damping ring is fixed to the core frame 3, and four damping tongues 9-1 spaced apart are provided on the inner wall of the damping ring 9, the damping tongues extending concentrically to the free end and embedded with balls 9-2, the balls making rolling contact with the ring wall of the damping disc 8.

[0023] Furthermore, the instrument connector 2 has a longitudinal medium channel inside, one end of which extends to the bottom of the instrument connector and the other end connects to the C-shaped spring tube 6. The outer wall of the instrument connector 2 has a blind hole 2-1, which is orthogonally connected to the channel. A damping screw 2-2 is screwed into the blind hole 2-1. The damping screw has a through hole 2-2.1 that matches the channel. By rotating the damping screw 2-2, the communication area between the through hole 2-2.1 and the channel can be adjusted.

[0024] Furthermore, the blind hole 2-1 has threaded sections on both sides of its inner wall at the intersection with the channel, which are in contact with the damping screw 2-2; the damping screw 2-2 is fitted with a sealing ring 2-2.2 on its outer circumference. After the damping screw 2-2 is screwed into the blind hole 2-1, the sealing ring 2-2.2 fits tightly against the unthreaded section of the blind hole 2-1.

[0025] Furthermore, one end of the movement frame 3 is provided with an annular mounting platform 3-1, and a damping ring 9 is screwed around the outer circumference of the mounting platform 3-1. The damping ring 9 is coaxial with the damping disc 8 laterally.

[0026] Furthermore, the outer wall of the damping disc 8 is toothed, and the damping tongue 9-1 is the main body in an S-shaped curve. The damping tongue 9-1 and the toothed damping disc 8 are in rolling contact through the ball 9-2. The vibration energy is absorbed by elastic deformation, realizing liquid-free dry shock resistance and avoiding the risk of leakage and pollution of traditional damping fluid.

[0027] Example 2: The difference from Example 1 lies in the installation method of the mounting platform 3-1 and the damping ring 9, and the structural form and matching method of the damping disk 8 and the damping tongue 9-1. In this example, the damping ring 9 is snapped onto the outer periphery of the mounting platform 3-1, the outer wall of the damping disk 8 is provided with an annular damping groove 8-1, the damping tongue 9-1 is a centripetal cone, and the ball bearing 9-2 rolls in contact with the damping groove 8-1. Liquid-free shock resistance is achieved through a purely mechanical structure, breaking through the application limitations of traditional damping liquid-type shock-resistant pressure gauges.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shock-resistant pressure gauge, comprising a housing, an instrument connector at the lower end of the housing, an upper part of the instrument connector extending into the housing and connected to a core frame at the end, a sector gear and a pointer shaft being rotatably mounted on the core frame at intervals, a central gear meshing with the sector gear being fitted on the pointer shaft, and a pointer being mounted on the front end of the pointer shaft extending out of the core frame; The outer periphery of the mechanism frame is provided with a C-shaped spring tube. One end of the spring tube is connected to the side wall of the instrument connector, and the other end is hinged to a connecting rod. The end of the connecting rod is hinged to the non-gear end of the sector gear. Its features are, A damping disc is installed at the rear end of the pointer shaft extending from the movement frame. The damping disc has a damping ring on its outer periphery, which is fixed to the movement frame. The inner wall of the damping ring is provided with several damping tongues spaced apart. The damping tongues extend concentrically to their free ends and are fitted with balls. The balls make rolling contact with the ring wall of the damping disc.

2. The shock-resistant pressure instrument according to claim 1, characterized in that, The instrument connector has a longitudinal medium channel inside, one end of which extends to the bottom of the instrument connector and the other end connects to the C-shaped spring tube. The outer wall of the instrument connector has a blind hole that is orthogonally connected to the channel. A damping screw is screwed into the blind hole, and the damping screw has a through hole that matches the channel. By rotating the damping screw, the communication area between the through hole and the channel can be adjusted.

3. The shock-resistant pressure instrument according to claim 2, characterized in that, The blind hole has threaded sections on the inner walls on both sides where it intersects the channel, which are used to engage with damping screws.

4. The shock-resistant pressure instrument according to claim 2, characterized in that, A sealing ring is fitted around the outer periphery of the damping screw. After the damping screw is screwed into the blind hole, the sealing ring fits tightly against the inner wall of the blind hole.

5. The shock-resistant pressure instrument according to claim 1, characterized in that, One end of the mechanism frame is provided with an annular mounting platform, and the damping ring is fitted around the outer periphery of the mounting platform. The damping ring is laterally coaxial with the damping disc.

6. A shock-resistant pressure gauge according to claim 1 or 5, characterized in that, The outer wall of the damping disc is toothed, the damping tongue is S-shaped, and the ball bearings are in rolling contact with the damping teeth of the damping disc.

7. A shock-resistant pressure instrument according to claim 1 or 5, characterized in that, The outer wall of the damping disc is provided with an annular damping groove, the damping tongue is a centripetal cone, and the ball bearings are in rolling contact with the damping groove.

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