CN209247122U - A kind of stable type difference gauge - Google Patents
A kind of stable type difference gauge Download PDFInfo
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- CN209247122U CN209247122U CN201920255594.9U CN201920255594U CN209247122U CN 209247122 U CN209247122 U CN 209247122U CN 201920255594 U CN201920255594 U CN 201920255594U CN 209247122 U CN209247122 U CN 209247122U
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- bellows
- low pressure
- measurement shell
- shell
- centre mount
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Abstract
The utility model discloses a kind of stable type difference gauges, including centre mount and the high-tension measurement shell and low pressure measurement shell that are oppositely arranged on centre mount two sides, central axis is provided in centre mount, central axis two sides are located in high-tension measurement shell and low pressure measurement shell, bellows is provided in high-tension measurement shell and low pressure measurement shell, bellows one end is fixedly connected with central axis end, the bellows other end is fixedly connected with centre mount, high-tension measurement shell inner wall, low pressure measurement shell inner wall forms high-tension measurement room with corresponding ripple pipe outer wall respectively, low pressure measurement room, range spring is provided in bellows, block ring is provided in high-tension measurement shell and low pressure measurement shell, block ring is set in outside bellows.Directly to the impact of bellows when entering high low pressure measuring chamber which obviate gas, keep the deformation process of bellows gentle, be linearly well hardly mutated, greatly improves the pointer that bellows fluctuation causes and accidentally show phenomenon.
Description
Technical field
The utility model relates to level display device technical field in low temperature, vacuum industry basin, more particularly to one kind are steady
Sizing difference gauge.
Background technique
Dual bellows differential gauges are mainly used for the measurement of refrigerated storage tank (storage tank and slot) interior liquid gas liquid level.In structure
On, existing dual bellows differential gauges are mainly made of the part such as two bellowss, range spring, torque tube and shell.Its
There is a central seat, two sides of base is respectively arranged with bellows, and there is rigid end cap at bellows both ends, and are rigidly attached by connecting shaft
Get up to be integrally formed.High pressure and low pressure measurement room are respectively formed between the outside and shell of two bellowss.When by side medium
When two pressure P1 and P2 are induced one in high and low pressure room by connecting pipe respectively, under the action of differential pressure p=p1-P2 > 10, hyperbaric chamber
Interior bellows is compressed, and volume reduces, and the incompressible fluid of inside filling will pass through annular gap and damping bypass flow direction
Low-pressure chamber extends the bellows of low-pressure chamber, and volume increases, so that connecting shaft be driven to move from left to right.When connecting shaft is mobile
When, the elongation of range spring will be driven, until the deformation of power and range spring and bellows that differential pressure is formed on bellows bottom surface
Until power balances each other.Gas after liquefying enters from air inlet, is directly full of high low pressure measuring chamber cavity, then pushes wave
Line pipe generates flexible deformation.
But existing dual bellows differential gauges are when gas has just enter into air inlet, since gas directly impacts bellows side
Face, and bellows is extremely sensitive to pressure change, be easy to cause bellows to be shaken compression and forms meaningless fluctuation, to cause
The mistake of pointer is shown, error and inaccuracy is generated to the measurement of liquid level, especially in the liquidometer of small-range in use, this is missed
Show that situation is especially prominent.
Utility model content
The utility model is intended to provide a kind of stable type difference gauge, and the very good solution above problem, structure is simple, keeps away
Exempt to keep the deformation process of bellows gentle directly to the impact of bellows when gas enters high low pressure measuring chamber, it is linear good
It is hardly mutated, greatly improves the pointer that bellows fluctuation causes and accidentally show phenomenon.
The technical solution of the utility model is a kind of stable type difference gauge, it is characterised in that: including centre mount and opposite is set
The high-tension measurement shell and low pressure measurement shell in centre mount two sides are set, is provided with central axis in the centre mount, in the central axis
Portion is connect by transmission mechanism with clockwork, and the central axis two sides are located in high-tension measurement shell and low pressure measurement shell,
Bellows, the fixed company in described bellows one end and central axis end are provided in the high-tension measurement shell and low pressure measurement shell
Connect, the bellows other end is fixedly connected with centre mount, the high-tension measurement shell inner wall, low pressure measurement shell inner wall respectively with it is right
The ripple pipe outer wall answered forms high-tension measurement room, low pressure measurement room, is provided with range spring, the high pressure in the bellows
It is provided with block ring in measurement shell and low pressure measurement shell, the block ring is set in outside bellows.
Further, on the basis of above scheme, air inlet connecting is provided on the high-tension measurement shell and low pressure measurement shell
Head.
Further, on the basis of above scheme, the central axis both ends are arranged with swivel nut, and the swivel nut is fixedly connected
There is bellows cover board, the bellows and bellows cover board are tightly connected.
Further, on the basis of above scheme, the centre mount passes through corresponding flange and high-tension measurement shell, low respectively
Pressure measurement shell is fixedly connected.
Further, on the basis of above scheme, there are two range spring in each bellows is equal, the range
The both ends of spring are fixedly connected with flange, bellows cover board respectively.
Further, on the basis of above scheme, it is provided with boss on the block ring, the nearly centre mount end of the block ring
Outer diameter be greater than remote centre mount end outer diameter.
Further, on the basis of above scheme, it is provided with interior storehouse in the centre mount, is provided in the middle part of the central axis
Left baffle ring and right baffle ring, the left baffle ring and right baffle ring are respectively positioned in interior storehouse, and the bellows is connected to interior storehouse, form confined air
Between.
Further, on the basis of above scheme, pass through deep-groove ball axis between the left baffle ring and right baffle ring of the central axis
It holds and is connected with transmission arm.
Further, on the basis of above scheme, the transmission arm is set in torque tube, the torque tube and clock and watch machine
Structure connection.
Further, on the basis of above scheme, the centre mount bottom is provided with bracket, the centre mount top setting
There is clockwork.
The beneficial effects of the utility model are:
1. the utility model has been arranged block ring on the outside of bellows, make to enter by inlet suction port high-tension measurement shell and low
Gas in pressure measurement shell acts on block ring, avoids its directly impact bellows side, then gas and bellows cover
Plate contact, keeps the deformation process of bellows gentle, is linearly well hardly mutated, and greatly improves bellows fluctuation
The pointer of initiation accidentally shows phenomenon；
2. gas enters from inlet suction port, due to the blocking of block ring, narrow sky is formd between block ring and measurement shell
Between, learn that the gas flow rate for flowing into block ring narrow is big by bernoulli principle, pressure is small, that is, directly acts on bellows
Gas pressure intensity reduces, until gas, completely into balance is slowly reached after cavity, the deformation of bellows also tends towards stability at this time；By
In the narrow space that block ring is formed, the deformation process of bellows is gentle, is linearly well hardly mutated；Especially exist
In the difference gauge use process of small-range, since the rigidity of bellows and range spring is smaller, so to the sensitivity of pressure change
Degree is very high, causes meaningless fluctuation, block ring reduces the mutation of bellows, and the design of block ring can largely improve
The pointer that pressure oscillation causes accidentally shows phenomenon；
3. two range springs are arranged in the utility model in bellows, the deformation of bellows is made to restore etc. more steady,
Further improve the stability of difference gauge.
Detailed description of the invention
Fig. 1 is the utility model main view；
Fig. 2 is the schematic diagram of the section structure of A-A in Fig. 1；
Fig. 3 is the utility model bottom view；
Fig. 4 is the schematic diagram of the section structure of B-B in Fig. 3；
Fig. 5 is the structural schematic diagram of the block ring of the utility model；
Fig. 6 is the schematic perspective view of the utility model；
Fig. 7 is the utility model internal gas flow flow schematic diagram；
In figure: 1. centre mounts, 2. high-tension measurement shells, 3. low pressure measurement shells, 4. central axises, 5. clockworks, 6. bellowss,
7. range spring, 8. block rings, 9. inlet suction ports, 10. swivel nuts, 11. bellows cover boards, 12. boss, in 13. storehouse, 14. left gears
Ring, 15. right baffle rings, 16. deep groove ball bearings, 17. transmission arms, 18. torque tubes, 19. brackets.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing, to this reality
It is further elaborated with novel.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation or be constructed and operated in a specific orientation, therefore it should not be understood as limiting the present invention.In addition, term
" first ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；Of course, can also be mechanical connection, it is also possible to be electrically connected；In addition, it can also be and be connected directly, be also possible to
Indirectly connected through an intermediary, or it can be connection inside two elements.For those of ordinary skill in the art and
Speech, can understand the concrete meaning of above-mentioned term in the present invention as the case may be.
Embodiment one, as shown in Figures 1 to 6, the utility model provide a kind of stable type difference gauge, it is characterised in that:
Including centre mount 1 and the high-tension measurement shell 2 and low pressure measurement shell 3 that are oppositely arranged on 1 two sides of centre mount, set in the centre mount 1
It is equipped with central axis 4, is connect by transmission mechanism with clockwork 5 in the middle part of the central axis 4, position is distinguished in 4 two sides of central axis
In in high-tension measurement shell 2 and low pressure measurement shell 3, bellows 6, institute are provided in the high-tension measurement shell 2 and low pressure measurement shell 3
It states 6 one end of bellows to be fixedly connected with 4 end of central axis, 6 other end of bellows is fixedly connected with centre mount 1, the height
Pressure measurement 2 inner wall of shell, 3 inner wall of low pressure measurement shell form high-tension measurement room, low pressure measurement with corresponding 6 outer wall of bellows respectively
Room, the ripple 6 manage in be provided with range spring 7, be provided with choked flow in the high-tension measurement shell 2 and low pressure measurement shell 3
Ring 8, the block ring 8 are set in outside bellows 6.
Inlet suction port 9 is provided on the high-tension measurement shell 2 and low pressure measurement shell 3.The setting of inlet suction port 9 is surveyed in high pressure
The side for measuring shell 2 and low pressure measurement shell 3, facilitates the access of air inlet pipe Yu inlet suction port 9, will not be influenced by clockwork 5 Deng.
4 both ends of central axis are arranged with swivel nut 10, and the swivel nut 10 is fixedly connected with bellows cover board 11, the wave
Line pipe 6 and bellows cover board 11 are tightly connected.
The centre mount 1 is fixedly connected by corresponding flange with high-tension measurement shell 2, low pressure measurement shell 3 respectively.
Boss 12 is provided on the block ring 8, the outer diameter at the nearly centre mount end of the block ring 8 is greater than remote centre mount end
Outer diameter.The gas for facilitating access for measurement shell is flowed to 11 direction of bellows cover board, further avoids its directly impact bellows 6
Side.
It is provided with interior storehouse 13 in the centre mount 1, left baffle ring 14 and right baffle ring 15, institute are provided in the middle part of the central axis 4
It states left baffle ring 14 to be respectively positioned in interior storehouse 13 with right baffle ring 15, the bellows 6 is connected to interior storehouse 13, forms confined space.
Transmission arm 17 is connected with by deep groove ball bearing 16 between the left baffle ring 14 and right baffle ring 15 of the central axis 4.
The transmission arm 17 is set in torque tube 18, and the torque tube 18 is connect with clockwork 5.
Connection between central axis 4 and clockwork 5 is the prior art, generally passes through moving left and right for central axis 4
Transmission arm 17 is rotated, the variation of torque tube 18 is further driven to, so that it is driven transmission of clockwork 5 etc., finally makes clock and watch machine
Indicators turn on structure 5 reflects the size of differential pressure or the number of liquid level.And clockwork 5 is also existing common double wave
The clockwork of line pipe difference gauge.
Embodiment two, as shown in figure 4, further, on the basis of example 1, the amount in each bellows 6
There are two journey spring 7 is equal, the both ends of the range spring 7 are fixedly connected with flange, bellows cover board 11 respectively.Make bellows 6
Deformation restore etc. more steady, further improve the stability of difference gauge.
Embodiment three, as shown in fig. 6, further, on the basis of example 1,1 bottom of centre mount is provided with
Bracket 19,1 top of centre mount are provided with clockwork 5.The setting of bracket 19 facilitates the installation and use of difference gauge.
As shown in fig. 7, arrow direction is that air-flow enters the direction flowed in difference gauge.The utility model is outside bellows 6
Side has been arranged block ring 8, and the gas entered in high-tension measurement shell 2 and low pressure measurement shell 3 by inlet suction port 9 is made to act on choked flow
On ring 8, its directly impact 6 side of bellows is avoided, then gas is contacted with bellows cover board 11, makes the deformation of bellows 6
Process is gentle, is linearly well hardly mutated, and greatly improves the pointer that the fluctuation of bellows 6 causes and accidentally shows now
As；Gas enters from inlet suction port 9, due to the blocking of block ring 8, forms narrow space between block ring 8 and measurement shell, by
Bernoulli principle learns that the gas flow rate for flowing into block ring narrow is big, and pressure is small, that is, directly acts on the gas of bellows 6
Pressure reduces, until gas, completely into balance is slowly reached after cavity, the deformation of bellows 6 also tends towards stability at this time；Due to
The narrow space that block ring 8 is formed, the deformation process of bellows 6 is gentle, is linearly well hardly mutated；Especially exist
In the difference gauge use process of small-range, since the rigidity of bellows 6 and range spring 7 is smaller, so to the quick of pressure change
Sensitivity is very high, causes meaningless fluctuation, and block ring 8 reduces the mutation of bellows, and the design of block ring 8 can be largely
Improve the pointer that pressure oscillation causes and accidentally shows phenomenon.
Certainly, the utility model can also have other various embodiments, without departing substantially from the spirit of the present invention and its essence
In the case of, those skilled in the art can make various corresponding changes and modifications, but these phases according to the utility model
The change and modification answered all should belong to the protection scope of the utility model the attached claims.
Claims (10)
1. a kind of stable type difference gauge, it is characterised in that: including centre mount and the high-tension measurement for being oppositely arranged on centre mount two sides
Shell and low pressure measurement shell are provided with central axis in the centre mount, pass through transmission mechanism and clockwork in the middle part of the central axis
Connection, the central axis two sides are located in high-tension measurement shell and low pressure measurement shell, the high-tension measurement shell and low pressure measurement
Bellows is provided in shell, described bellows one end is fixedly connected with central axis end, the bellows other end and center
Seat is fixedly connected, and the high-tension measurement shell inner wall, low pressure measurement shell inner wall form high pressure with corresponding ripple pipe outer wall respectively and survey
Room, low pressure measurement room are measured, range spring is provided in the bellows, is all provided in the high-tension measurement shell and low pressure measurement shell
It is equipped with block ring, the block ring is set in outside bellows.
2. stable type difference gauge according to claim 1, it is characterised in that: on the high-tension measurement shell and low pressure measurement shell
It is provided with inlet suction port.
3. stable type difference gauge according to claim 1, it is characterised in that: the central axis both ends are arranged with swivel nut,
The swivel nut is fixedly connected with bellows cover board, and the bellows and bellows cover board are tightly connected.
4. stable type difference gauge according to claim 3, it is characterised in that: the centre mount passes through corresponding flange respectively
It is fixedly connected with high-tension measurement shell, low pressure measurement shell.
5. stable type difference gauge according to claim 4, it is characterised in that: the range spring in each bellows is equal
There are two, the both ends of the range spring are fixedly connected with flange, bellows cover board respectively.
6. stable type difference gauge according to claim 1, it is characterised in that: boss is provided on the block ring, it is described
The outer diameter at the nearly centre mount end of block ring is greater than the outer diameter at remote centre mount end.
7. stable type difference gauge according to claim 1, it is characterised in that: interior storehouse is provided in the centre mount, it is described
Left baffle ring and right baffle ring are provided in the middle part of central axis, the left baffle ring and right baffle ring are respectively positioned in interior storehouse, the bellows with it is interior
Storehouse connection, forms confined space.
8. stable type difference gauge according to claim 7, it is characterised in that: the left baffle ring of the central axis and right baffle ring it
Between transmission arm is connected with by deep groove ball bearing.
9. stable type difference gauge according to claim 8, it is characterised in that: the transmission arm is set in torque tube, institute
Torque tube is stated to connect with clockwork.
10. stable type difference gauge according to claim 1, it is characterised in that: the centre mount bottom is provided with bracket, institute
It states centre mount top and is provided with clockwork.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920255594.9U CN209247122U (en) | 2019-02-28 | 2019-02-28 | A kind of stable type difference gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920255594.9U CN209247122U (en) | 2019-02-28 | 2019-02-28 | A kind of stable type difference gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209247122U true CN209247122U (en) | 2019-08-13 |
Family
ID=67537311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920255594.9U Active CN209247122U (en) | 2019-02-28 | 2019-02-28 | A kind of stable type difference gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209247122U (en) |
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2019
- 2019-02-28 CN CN201920255594.9U patent/CN209247122U/en active Active
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