CN215374318U

CN215374318U - Vacuum pressure gauge

Info

Publication number: CN215374318U
Application number: CN202122085021.6U
Authority: CN
Inventors: 蒋林
Original assignee: Zhejiang Chuangxin Instrument Co ltd
Current assignee: Zhejiang Chuangxin Instrument Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2021-12-31
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a pressure gauge, aiming at providing a pressure gauge for measuring the pressure of vacuum gas, which adopts the technical scheme that the pressure gauge comprises a pressure gauge main body and a transmission assembly, wherein the pressure gauge main body comprises a meter shell, a dial, a gauge needle, glass and an air inlet pipe, the transmission assembly comprises a bourdon tube, a limiting block, a transmission shaft, a rotating shaft, an L-shaped steering shaft, a machine core and a hairspring, the bourdon tube and the air inlet pipe are integrally connected, the bourdon tube is connected with the L-shaped steering shaft through the transmission shaft, the L-shaped steering shaft is connected with the machine core through the rotating shaft, the machine core is connected with the gauge needle through the hairspring and the gauge needle, the dial is fixed at the bottom of the meter shell, the gauge needle, a glass mirror surface and scales are arranged on the dial, an overflow hole is arranged at the bottom of the meter shell, a sealed cabin is arranged at the air inlet pipe, the air inlet pipe penetrates through the sealed cabin and is connected with the bourdon tube, a sealing ring is sleeved outside the air inlet of the vacuum pressure gauge, and the vacuum pressure gauge is made of an anti-corrosion material, the protective nut is arranged at the air inlet, and the vacuum gas pressure measuring device is suitable for measuring vacuum gas pressure.

Description

Vacuum pressure gauge

Technical Field

The utility model relates to a pressure gauge, in particular to a vacuum pressure gauge.

Background

The vacuum pressure gauge is used for measuring an instrument smaller than the atmospheric pressure, the vacuum pressure gauge generates elastic deformation by being pressed through a sensitive element in the gauge, the elastic deformation of the sensitive element is transmitted to a machine core by a connecting rod mechanism in the gauge, the elastic deformation is converted into pointer rotation to display pressure by amplification, and the pointer changes along with the change of the pressed sensitive element.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a vacuum pressure gauge convenient for observing numerical values.

In order to achieve the purpose, the utility model provides the following technical scheme that the vacuum pressure gauge comprises a pressure gauge main body and a transmission assembly, wherein the transmission assembly is fixed in the pressure gauge main body through a screw and is rotationally connected with the pressure gauge main body; the transmission assembly comprises a bourdon tube, a limiting block, a transmission shaft, a rotating shaft, an L-shaped steering shaft, a machine core and a hairspring, the bourdon tube is connected with the top end of the air inlet pipe, the bourdon tube, the limiting block, the transmission shaft, the rotating shaft, the machine core and the hairspring are sequentially connected in the air inlet direction of the vacuum pressure gauge through screws, and the movable shaft is rotatably connected with the transmission assembly.

Through the technical scheme, the vacuum pressure gauge is communicated with the gas to be measured through the air inlet pipe, the gas to be measured enters the bourdon tube through the air inlet pipe, the generated gas pressure can enable the bourdon tube to be subjected to micro-deformation, the transmission assembly transmits the micro-deformation generated by the bourdon tube to the hairspring, the hairspring drives the movable shaft to rotate, and the movable shaft drives the gauge needle to rotate, so that the value of the pressure of the gas to be measured is displayed.

The utility model is further configured to: the bourdon tube is connected with the air inlet pipe in an integrated mode, the bourdon tube is connected with the transmission shaft through screws, the transmission shaft is connected with the L-shaped steering shaft through screws, the L-shaped steering shaft is connected with the rotating shaft through screws, the movement is rotatably connected with the hairspring, the other end of the hairspring is connected with the watch hand, the hairspring is sleeved outside the fixing block, and the L-shaped steering shaft is fixed on the dial plate through two limiting screws.

Through the technical scheme, gas to be measured enters the bourdon tube, the bourdon tube can be subjected to micro displacement after the bourdon tube is subjected to micro deformation, so that the transmission shaft is driven to be displaced, the transmission shaft enables the movement to be displaced, the movement drives the hairspring to contract, and the hairspring drives the pointer to display a real-time pressure value.

The utility model is further configured to: the watchcase bottom is equipped with the stopper, and the dial plate passes through the spacing screw of 2 symmetries to be fixed in the watchcase bottom, and outside the loose axle was located to the dial plate cover, still the cover was equipped with the gauge needle on the loose axle, and the fixed block sets up on the dial plate below and for fixed loose axle, the watchcase outside is provided with sealed glass mirror surface, and the watchcase bottom is provided with the overflow hole, and the dial plate surface evenly is equipped with the scale, and the balance spring cover is located outside the loose axle.

Through above-mentioned technical scheme, the dial plate is fixed in inside the watchcase, and on the loose axle was fixed in the dial plate, the loose axle can be fixed the table needle, and the casing can be sealed to the glass mirror surface, guarantees the inside vacuum of casing, reduces measuring error, and the overflow hole is when inside gas pressure is too big, and the overflow hole is automatic to be opened, exhaust gas.

The utility model is further configured to: the air inlet pipe is provided with a sealed cabin, the sealed cabin is a space formed by sealing and surrounding two pistons arranged at the diameter opening of the shell and the inner wall of the shell, the pistons are tightly attached to the inner wall of the shell, and the air inlet pipe penetrates through the sealed cabin and is connected with the Bourdon tube.

Through above-mentioned technical scheme, the sealed storehouse can guarantee that the casing is inside not to get into the outside gas, guarantees the measuring result accuracy, and the intake pipe runs through piston and sealed storehouse and is connected with the Bourdon tube.

The utility model is further configured to: the vacuum pressure gauge is characterized in that a sealing ring is sleeved outside the air inlet pipe, the vacuum pressure gauge is made of an anti-corrosion material, a sealing protection nut is arranged at the air inlet pipe, and threads are arranged on the sealing protection nut along the air inlet direction.

Through above-mentioned technical scheme, the vacuum state in the watchcase can be guaranteed to the sealing washer, and measurable quantity anticorrosion gas pressure when measuring gas pressure will protect the nut rotation to screw up, can guarantee that gas can not reveal.

Drawings

FIG. 1 is a schematic view of the external structure of the vacuum pressure gauge of the present invention;

FIG. 2 is a schematic view of the internal structure of the vacuum pressure gauge according to the present invention;

FIG. 3 is a schematic side view of a vacuum pressure gauge according to the present invention;

the reference numbers in the figures are: 1. a watch case; 11. an air inlet pipe; 2. a dial plate; 21. a pointer; 22 scales are marked; 221. a movable shaft; 3. glass; 4. a transmission assembly; 41. a bourdon tube; 42. a drive shaft; 43. a screw; 44. an "L" shaped steering shaft; 441. a limiting column; 45. a balance spring; 46. a rotating shaft; 47. a movement; 5. an overflow aperture; 6. a seal ring; 7. a protective nut; 8. sealing the bin; 81. a piston.

Detailed Description

The vacuum pressure gauge of the present invention is further described with reference to fig. 1 to 3.

Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

The vacuum pressure gauge of the utility model is further described with reference to fig. 1 to 3, and comprises a pressure gauge main body and a transmission component 4, wherein the pressure gauge main body comprises a meter shell 1, a dial 2, a pointer 21, a glass 3 and an air inlet pipe 11, the dial 2 is arranged at the bottom of the meter shell 1, a plurality of limiting holes are arranged in the meter shell 1, the dial 2 is fixed in the meter shell 1 through a pair of symmetrical screws 43, a movable shaft 221 is arranged in the middle of the dial 2, the movable shaft 221 penetrates through the dial 2, a fixed block is arranged below the movable shaft 221 on the dial 2 and used for clamping the dial 2, the fixed block is connected with the movable shaft 221 in a buckling manner, the pointer 21 is sleeved on the movable shaft 221 and can rotate freely, scales 22 are arranged on the dial 2, the range of the scales 22 is-0.1 MPa-1.5MPa, the minimum lattice unit is 0.02 MPa/lattice, the ten lattices are one large lattice, the 0.2MPa and the 5 lattices are one small lattice, the vacuum pressure gauge is used for negative pressure protection at 0.1MPa and 0.1MPa, and is used for air discharge protection of the vacuum pressure gauge, a glass 3 mirror surface is in seamless connection with the watchcase 1 to ensure that the inside of the watchcase 1 is sealed, the air inlet pipe 11 is arranged at the bottom of the watchcase 1, a cylindrical through hole is formed in the bottom of the watchcase 1, the air inlet pipe 11 penetrates through the cylindrical through hole and is connected with the Bourdon tube 41, a sealed cabin 8 is arranged outside the air inlet pipe 11, the sealed cabin 8 is a sealed space formed by two pistons 81 and the inner wall of the shell in a surrounding mode, the upper piston 81 is arranged at the joint of the air inlet pipe 11 and the Bourdon tube 41, the lower piston 81 is arranged at the air inlet end of the air inlet pipe 11, and the sealed cabin 8 can ensure that the inside of the shell is vacuum sealed.

The transmission assembly 4 comprises a Bourdon tube 41, a limiting block, a transmission shaft 42, a rotating shaft 46, an L-shaped steering shaft 44, a movement 47 and a hairspring 45, the Bourdon tube 41 is connected with the top end of the air inlet pipe 11, the Bourdon tube 41 is seamlessly connected with the air inlet, the Bourdon tube 41 is annular, the length of the Bourdon tube is three quarters of the circumference, the Bourdon tube 41 is fixed at the bottom of the watchcase 1 through a limiting column 441, the outlet end of the Bourdon tube 41 is positioned at the middle right side of the watchcase 1, the outlet of the Bourdon tube 41 is fixedly connected with the transmission shaft 42 through the limiting block, the limiting block is fixed at the bottom of the watchcase 1 through a screw 43, the transmission shaft 42 is a rectangular slotted hole, the other end of the transmission shaft 42 is rotatably connected with the rotating shaft 46 through a limiting screw 43, the L-shaped steering shaft 44 is fixed in the shell through two screws 43, the movement 47 and the rotating shaft 46 are arranged on the L-shaped steering shaft 44, the movement 47 is connected with the hairspring 45, the hairspring 45 is sleeved on the movable shaft 221, 5-7 circles are wound on the balance spring 45, the balance spring 45 is rotatably connected with the watch hand 21 on the dial 2, a sealing protection nut 7 is arranged at the position of a sealing bin 8, threads are arranged on the protection nut 7 in the air inlet direction, when the vacuum pressure gauge is used, a gas container to be detected is firstly connected with an air inlet pipe 11, meanwhile, the sealing protection nut 7 is screwed in a rotating mode, the whole device is guaranteed to be in a vacuum sealing state, gas to be detected enters the bourdon tube 41 through the air inlet pipe 11, the bourdon tube 41 can expand to generate micro deformation due to the entry of the gas to be detected and can stretch outwards slightly, the transmission shaft 42 can be driven to generate displacement at the moment, the displacement is transmitted to the movement 47 through the rotating shaft 46, the movement 47 rotates to enable the connected balance spring 45 to contract, and the balance spring 45 contracts to enable the watch hand 21 to rotate and display the pressure value at the moment.

The air inlet of the vacuum pressure gauge is sleeved with the sealing ring 6, the sealing ring 6 can ensure that the inner cavity of the shell is vacuum and airtight, air leakage cannot occur to cause inaccurate measurement of air pressure, the overflow hole 5 is formed in the shell 1, when the pressure of gas to be measured is too large, the overflow hole 5 is automatically opened to enable the gas to flow out, and it is ensured that the glass 3 mirror surface cannot break due to the too large pressure of the gas, so that the safety of a user is protected, the vacuum pressure gauge is made of an anti-corrosion material, and the anti-corrosion gas pressure can be measured.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.

Claims

1. A vacuum pressure gauge, characterized in that: the pressure gauge comprises a pressure gauge main body and a transmission assembly (4), wherein the transmission assembly (4) is fixed in the pressure gauge main body through a screw (43) and the transmission assembly (4) is rotatably connected with the pressure gauge main body, the pressure gauge main body comprises a gauge shell (1), a gauge plate (2), a gauge needle (21), glass (3) and an air inlet pipe (11), the gauge plate (2) is arranged at the bottom of the gauge shell (1), a movable shaft (221) is arranged in the middle of the gauge plate (2), scales (22) are arranged on the gauge plate (2), the gauge needle (21) is sleeved on the movable shaft (221), fixed blocks are arranged at two ends of the movable shaft (221), the glass (3) is arranged on the outer side of the gauge shell (1), the glass (3) is used for sealing the gauge shell (1), and the air inlet pipe (11) is arranged at the bottom of the gauge shell (1); the transmission assembly (4) comprises a Bourdon tube (41), a limiting block, a transmission shaft (42), a rotating shaft (46), an L-shaped steering shaft (44), a machine core (47) and a hairspring (45), the Bourdon tube (41) is connected with the top end of the air inlet pipe (11), the Bourdon tube (41), the transmission shaft (42), the rotating shaft (46), the machine core (47) and the hairspring (45) are sequentially connected along the air inlet direction of the vacuum pressure gauge through screws (43), and the movable shaft (221) is rotatably connected with the transmission assembly (4).

2. A vacuum pressure gauge according to claim 1, wherein: the bourdon tube (41) is integrally connected with the air inlet tube (11), the bourdon tube (41) is connected with the transmission shaft (42) through a screw (43), the transmission shaft (42) is connected with the L-shaped steering shaft (44) through the screw (43), the L-shaped steering shaft (44) is connected with the rotating shaft (46) through the screw (43), the movement (47) is rotatably connected with the hairspring (45), the other end of the hairspring (45) is connected with the pointer (21), the hairspring (45) is sleeved outside the fixed block, and the L-shaped steering shaft (44) is fixed on the dial (2) through two limiting screws (43).

3. A vacuum pressure gauge according to claim 2, wherein: watchcase (1) bottom is equipped with the stopper, dial plate (2) are fixed in watchcase (1) bottom through spacing screw (43) of 2 symmetries, outside loose axle (221) were located to dial plate (2) cover, still the cover was equipped with table needle (21) on loose axle (221), the fixed block sets up in dial plate (2) upper and lower face, be used for fixed loose axle (221), watchcase (1) outside is provided with sealed glass (3) mirror surface, watchcase (1) bottom is provided with overflow hole (5), dial plate (2) surface evenly is equipped with scale (22), balance spring (45) cover is located outside loose axle (221).

4. The vacuum pressure gauge according to claim 2, wherein the air inlet pipe (11) is provided with a sealed bin (8), the sealed bin (8) is a space formed by two pistons (81) arranged at the radial port of the watch case (1) and the inner wall of the case in a sealed and surrounding manner, the pistons (81) are tightly attached to the inner wall of the case, and the air inlet pipe (11) penetrates through the sealed bin (8) and is connected with the Bourdon tube (41).

5. The vacuum pressure gauge according to claim 4, wherein: a sealing washer (6) is sleeved outside an air inlet of the vacuum pressure gauge.

6. A vacuum pressure gauge according to claim 1, wherein: the vacuum pressure gauge is made of an anti-corrosion material.

7. A vacuum pressure gauge according to claim 1, wherein: the air inlet pipe is provided with a sealing protection nut (7), and the sealing protection nut (7) is provided with threads along the air inlet direction.