CN216050416U

CN216050416U - Pneumatic system pressure gauge suitable for complex environment

Info

Publication number: CN216050416U
Application number: CN202121368945.0U
Authority: CN
Inventors: 胡以青
Original assignee: Suzhou Qinghua Railway Accessories Co ltd
Current assignee: Suzhou Qinghua Railway Accessories Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-03-15
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses a pressure gauge of a pneumatic system, which adapts to a complex environment and comprises a gauge shell, wherein a gauge stand is fixedly arranged on the gauge shell through a hexagon socket screw, one end of a Bourdon tube is welded on the outer side of the gauge stand, a movement is arranged on the outer side of the gauge stand, and a dial plate is fixedly arranged on the outer side of the movement. The pressure gauge of the air pressure system suitable for the complex environment is provided with a Bourdon tube, the Bourdon tube is made of a special material and a special process after a large number of material selection trial-manufacturing experiments, trial-manufacturing, testing, comparison and durability tests are carried out on materials, part matching precision and dimensional precision tolerance of parts under different temperature conditions, the size of the parts and the deviation value and matching precision of each size are calculated and determined, meanwhile, the precision of the pressure gauge reaches 1.0 level by the overall structure and the installation mode of the pressure gauge, the national standard requirement is exceeded, when the diameter of the pressure gauge is regulated to be less than or equal to 100 millimeters by the national standard, the highest precision is 2.5 levels, the diameter of the pressure gauge is only 80 millimeters, and the precision reaches 1.0 level.

Description

Pneumatic system pressure gauge suitable for complex environment

Technical Field

The utility model relates to the technical field of pressure gauges, in particular to a pressure gauge of a pneumatic system, which is suitable for complex environments.

Background

The pressure gauge is an instrument which takes an elastic element as a sensitive element and measures and indicates the pressure higher than the environmental pressure, is very common in application, almost extends to all the fields of industrial processes and scientific researches, is visible everywhere in the fields of heating power pipe networks, oil and gas transmission, water and gas supply systems, vehicle maintenance and repair shops and the like, and is visual in observation due to the characteristics of high mechanical strength, convenient production and the like of the elastic sensitive element of the mechanical pressure gauge in the industrial process control and technical measurement process. The mechanical pressure gauge is more and more widely applied.

The pressure gauge used in the existing railway industry is a sheet metal stamping shell part which is a thin-walled part and is easy to deform and generate vibration and noise, the connection mode adopts tubular connection, the tubular connection has large vibration and large installation space, and is not suitable for high-speed trains, the precision of the pressure gauge is low and is less than or equal to 1.6 grade, the precision is unstable, so that frequent detection and adjustment are needed, the adaptability of the environment is poor, and the pressure display value deviation at low temperature of-40 ℃ and high temperature of 80 ℃ is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure gauge of a pneumatic system, which is suitable for complex environment, and solves the problems that the existing pressure gauge for the railway industry in the background technology is a sheet metal stamping shell part, the sheet metal part is a thin-walled part and is easy to deform and generate vibration and noise, the connection mode adopts tubular connection, the tubular installation connection has large vibration and large installation space, is not suitable for high-speed trains, the pressure gauge has low precision which is less than or equal to 1.6 grade, the precision is unstable, so that frequent detection and adjustment are needed, the adaptability of the environment is poor, and the pressure display value deviation at low temperature of-40 ℃ and high temperature of 80 ℃ is large.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a pneumatic system manometer of adaptation complex environment, includes the watchcase, the watchcase has the gauge stand through hexagon socket head cap screw fixed mounting, the outside welding of gauge stand has the one end of bourdon tube, the outside of gauge stand is provided with the core, the outside fixed mounting of core has the dial, the outside of core is provided with the pointer, the other end welding of bourdon tube has the closing cap, the outside of closing cap is provided with the pipe tail support, pipe tail support has the connecting rod through pipe tail screwed connection, the connecting rod passes through connecting rod screwed connection in the core, the inside of watchcase is provided with sealed the pad, the inboard of watchcase is provided with the table mirror, be provided with the retaining ring between the outside of table mirror and the watchcase.

Preferably, the number of the inner hexagon screws is three, and the inner hexagon screws are in threaded connection with the gauge stand.

Preferably, the watchcase is made of aluminum alloy materials, the dial is in a black character with green background, and the watchcase is installed and connected in a plate mode.

Preferably, the tube tail support is rotatably connected with the connecting rod through a tube tail screw, the connecting rod is rotatably connected with the machine core through a connecting rod screw, one end of the Bourdon tube is in welded connection with the meter seat, the other end of the Bourdon tube is in welded connection with the sealing cap, and the Bourdon tube is of a C-shaped structure.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of a gasket mounting structure according to the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention.

In the figure: 1. a watch case; 2. a dial; 3. a bourdon tube; 4. a movement; 5. a pointer; 6. sealing the cap; 7. a tube tail support; 8. a pipe tail screw; 9. a connecting rod screw; 10. a socket head cap screw; 11. a gasket; 12. a gauge stand; 13. a connecting rod; 18. a watch mirror; 19. and a retainer ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a pressure gauge of a pneumatic system adapting to a complex environment comprises a watchcase 1, a dial 2, a Bourdon tube 3, a movement 4, a pointer 5, a seal cap 6, a tube tail support 7, a tube tail screw 8, a connecting rod screw 9, an inner hexagon screw 10, a seal gasket 11, a gauge stand 12 and a connecting rod 13, wherein the watchcase 1 is fixedly provided with the gauge stand 12 through the inner hexagon screw 10, one end of the Bourdon tube 3 is welded on the outer side of the gauge stand 12, the movement 4 is arranged on the outer side of the gauge stand 12, the dial 2 is fixedly arranged on the outer side of the movement 4, the pointer 5 is arranged on the outer side of the movement 4, the seal cap 6 is welded on the other end of the Bourdon tube 3, the tube tail support 7 is arranged on the outer side of the seal cap 6, the tube tail support 7 is connected with the connecting rod 13 through the tube tail screw 8, the connecting rod 13 is connected with the movement 4 through the connecting rod screw 9, the seal gasket 11 is arranged inside of the watchcase 1, the inner side of the watchcase 1 is provided with a watch mirror 18, a collar 19 is provided between the outside of the watch mirror 18 and the watch case 1.

Further, there are three socket head cap screws 10, the socket head cap screws 10 are screwed to the bezel 12, and the bezel 12 is fixedly mounted to the case 1 by the socket head cap screws 10.

Furthermore, watchcase 1 adopts the aluminum alloy material to make, dial 2 is green end black word, watchcase 1 adopts plate-type connection, the aluminum alloy belongs to light metal material, there is higher intensity, specific strength is close high alloy steel, specific rigidity surpasses the steel, there are good casting performance and plastic working ability, good electric conduction, heat conductivility, good corrosion resistance and weldability, make watchcase 1 non-deformable, make simple to operate stable through the mode of plate-type connection, save space, be applicable to the high-speed train, dial 2 green end black words are clear, the eyeshield alleviates visual fatigue.

Further, a tube tail support 7 is rotatably connected with a connecting rod 13 through a tube tail screw 8, the connecting rod 13 is rotatably connected with the movement 4 through a connecting rod screw 9, one end of the Bourdon tube 3 is connected with a meter seat 12 in a welding manner, the other end of the Bourdon tube 3 is connected with a sealing cap 6 in a welding manner, the Bourdon tube 3 is of a C-shaped structure, the Bourdon tube 3 utilizes an elastic sensitive element for measuring pressure by bending change or torsional deformation of the tube, the section of the elastic sensitive element is oval or flat, the tube with a non-circular section is gradually expanded into a circle under the action of the internal pressure of the tube, the movable end generates displacement which has a certain relation with the pressure, the movable end drives the pointer 5 to indicate the pressure, the elastic deformation of the Bourdon tube 3 is converted into rotary motion through a conversion mechanism of the movement 4 in the meter, the pointer 5 is caused to deflect to display the pressure, and the displacement of the end of the Bourdon tube 3 can be directly displayed by a displacement measurer, the bourdon tube 3 with an elliptic section or a flat circular section deforms when bearing pressure p, so that the ratio a/b of the length radius to the length radius of the cross section of the bourdon tube is reduced, the curvature radius of the bourdon tube 3 is increased, the movable end of the bourdon tube is displaced, the bourdon tube 3 is made of a special material after a large number of material trial-manufacturing experiments, trial-manufacturing, testing and durability tests are carried out on the fitting precision and the dimensional precision tolerance of parts under different temperature conditions, the size of the parts, the deviation value and the fitting precision of each size are calculated and determined, the precision of the pressure gauge reaches 1.0 level and exceeds the national standard requirements, the national standard provides that the highest precision level of the pressure gauge with the diameter less than 100 millimeters is 2.5-level precision, the pressure gauge in the patent has the diameter of only 80 millimeters, and the precision reaches 1.0 level.

The working principle is as follows: firstly, the pressure gauge is installed by plate connection, the installation is convenient and stable by the plate connection, the space is saved, the pressure gauge is suitable for high-speed trains, the meter shell 1 is made of aluminum alloy material, the aluminum alloy belongs to light metal material, has higher strength, specific strength close to high alloy steel, specific rigidity exceeds steel, has good casting performance and plastic processing performance, good electric conduction and heat conduction performance, good corrosion resistance and weldability, the meter shell 1 is not easy to deform, the black characters on the green bottom of the dial plate 2 are clear, the eye protection is realized, the visual fatigue is reduced, the bourdon tube 3 utilizes an elastic sensitive element of the bending change or torsional deformation of the tube to measure the pressure, the cross section shape is oval or flat, the tube with the non-circular cross section gradually expands into a circle under the action of the internal pressure, at the moment, the movable end generates displacement which has a certain relation with the pressure, and the movable end drives the pointer 5 to indicate the pressure, the elastic deformation of the Bourdon tube 3 is converted into rotary motion by a conversion mechanism of the inner core 4 of the watch, the pointer 5 is caused to deflect to display pressure, the end displacement of the Bourdon tube 3 can be directly displayed by a displacement measurer, the Bourdon tube 3 with an elliptical section or a flat circular section deforms when bearing pressure p, the ratio a/b of the length to the radius of the cross section of the Bourdon tube 3 is reduced, the curvature radius of the Bourdon tube 3 is increased, so that the movable end of the Bourdon tube generates displacement, the Bourdon tube 3 selects a special material after a large number of material selection trial test experiments, trial production and test durability tests are carried out on the fitting precision and the dimensional precision tolerance of parts under different temperature conditions, the sizes of the parts and the deviation value and the fitting precision of each size are calculated and determined, the precision of the pressure gauge reaches 1.0 level and exceeds the national standard requirement and the national standard regulation, the highest precision grade that the diameter is less than 100 millimeters manometer is 2.5 grades of precisions, and this patent manometer diameter is only 80 millimeters, and the precision reaches 1.0 grade.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A pneumatic system pressure gauge adapted to a complex environment, comprising a case (1), characterized in that: the watch case (1) is fixedly provided with a watch seat (12) through an inner hexagon screw (10), one end of the Bourdon tube (3) is welded on the outer side of the gauge stand (12), the movement (4) is arranged on the outer side of the gauge stand (12), a dial (2) is fixedly arranged on the outer side of the movement (4), a pointer (5) is arranged on the outer side of the movement (4), a sealing cap (6) is welded at the other end of the Bourdon tube (3), a tube tail support (7) is arranged on the outer side of the sealing cap (6), the pipe tail support (7) is connected with a connecting rod (13) through a pipe tail screw (8), the connecting rod (13) is connected to the movement (4) through a connecting rod screw (9), a sealing gasket (11) is arranged inside the watchcase (1), a watch mirror (18) is arranged on the inner side of the watchcase (1), a retainer ring (19) is arranged between the outer side of the watch mirror (18) and the watch case (1).

2. The pressure gauge for a pneumatic system adapted to a complex environment of claim 1, wherein: the number of the inner hexagon screws (10) is three, and the inner hexagon screws (10) are in threaded connection with the gauge stand (12).

3. The pressure gauge for a pneumatic system adapted to a complex environment of claim 1, wherein: the watch case (1) is made of aluminum alloy materials, the dial plate (2) is black with green bottom, and the watch case (1) is connected in a plate mode.

4. The pressure gauge for a pneumatic system adapted to a complex environment of claim 1, wherein: the pipe tail support (7) is rotatably connected with the connecting rod (13) through a pipe tail screw (8), the connecting rod (13) is in transmission connection with the machine core (4) through a connecting rod screw (9), one end of the Bourdon tube (3) is in welded connection with the gauge stand (12), the other end of the Bourdon tube (3) is in welded connection with the sealing cap (6), and the Bourdon tube (3) is of a C-shaped structure.