CN219757434U - LPG flow measuring device - Google Patents
LPG flow measuring device Download PDFInfo
- Publication number
- CN219757434U CN219757434U CN202320649410.3U CN202320649410U CN219757434U CN 219757434 U CN219757434 U CN 219757434U CN 202320649410 U CN202320649410 U CN 202320649410U CN 219757434 U CN219757434 U CN 219757434U
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- Prior art keywords
- differential pressure
- valve
- valve core
- diaphragm
- pressure valve
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- 238000003825 pressing Methods 0.000 claims description 23
- 239000012528 membrane Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 3
- 239000003915 liquefied petroleum gas Substances 0.000 description 19
- 239000007789 gas Substances 0.000 description 16
- 239000008358 core component Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000306 component Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
Abstract
The utility model provides an LPG flow measuring device, which comprises a flowmeter and a filter assembly communicated with the flowmeter, wherein an oil-gas separator is arranged in the filter assembly, a differential pressure valve is arranged at the outlet side of the flowmeter, the differential pressure valve comprises a differential pressure valve body, a diaphragm assembly, a valve core assembly and a valve seat, the diaphragm assembly is arranged in the differential pressure valve body, the diaphragm assembly divides the inner cavity of the differential pressure valve body into a control cavity at the upper end and a medium cavity at the lower end, and an inlet and an outlet communicated with the medium cavity are arranged on the differential pressure valve body; the differential pressure valve is characterized in that an air guide port is arranged on the differential pressure valve body, the air guide port is connected with the oil-gas separator through an air guide pipe to enable the control cavity to be communicated with the upper cavity of the oil-gas separator, the diaphragm assembly is driven by the pressure difference between the control cavity and the medium cavity to drive the valve core assembly to enable the valve core assembly to move relative to the valve seat so as to enable the inlet to be communicated with or separated from the outlet, if the medium cavity is provided with gas, the differential pressure valve cannot be opened, and only when the medium cavity is not provided with gas, the differential pressure valve can be opened.
Description
Technical Field
The utility model relates to the field of measuring devices, in particular to an LPG flow measuring device.
Background
LPG (liquefied petroleum gas) is widely used in life and industry as a clean, efficient, and convenient energy source. During the production, transportation and use of LPG, it is necessary to measure its flow accurately to ensure the safety and efficiency of production, transportation and use.
When the flow measuring device is used for measuring the flow of the LPG (liquefied petroleum gas), the LPG needs to be operated at normal temperature, high pressure and liquid state, and the conventional flow measuring device cannot meet the requirement, so that the LPG is gasified, and the phenomenon of unqualified metering is caused. Aiming at the problems, the utility model provides the LPG flow measuring device with the differential pressure valve, which can ensure that LPG is always kept in a liquefied state in the measuring process, and has important practical significance and application value.
Disclosure of Invention
The utility model aims to overcome the defects and shortcomings of the prior art and provides an LPG flow measuring device which enables LPG to be always kept in a liquefied state.
The technical scheme adopted by the utility model is as follows:
the LPG flow measuring device comprises a flowmeter and a filter assembly communicated with the flowmeter, wherein an oil-gas separator is arranged in the filter assembly, a differential pressure valve is arranged on the outlet side of the flowmeter, the differential pressure valve comprises a differential pressure valve body, a diaphragm assembly, a valve core assembly and a valve seat, the diaphragm assembly is arranged in the differential pressure valve body, the diaphragm assembly divides the inner cavity of the differential pressure valve body into a control cavity at the upper end and a medium cavity at the lower end, and an inlet and an outlet which are communicated with the medium cavity are arranged on the differential pressure valve body;
the differential pressure valve body is provided with an air guide port, the air guide port is connected with the oil-gas separator through an air guide pipe to enable the control cavity to be communicated with the upper cavity of the oil-gas separator, and the diaphragm assembly is driven by the differential pressure of the control cavity and the medium cavity to drive the valve core assembly to enable the valve core assembly to move relative to the valve seat so as to enable the inlet to be communicated with or separated from the outlet.
Through the arrangement, as the control cavity is communicated with the upper cavity of the oil-gas separator, the pressure of the control cavity is equal to the air pressure of the upper cavity of the oil-gas separator, if the medium cavity is provided with air, the acting force of the medium cavity on the diaphragm assembly is equal to the acting force of the control cavity, the valve core assembly cannot be driven to open the differential pressure valve, and only when the medium cavity is not provided with air, the differential pressure valve can be opened.
Specifically, differential pressure valve body includes upper end cover and the lower valve body that links to each other from top to bottom, the diaphragm subassembly includes that the periphery is fixed in the elastic diaphragm between upper end cover and the lower valve body and fixed upper diaphragm clamp plate, the lower diaphragm clamp plate of setting in elastic diaphragm upper and lower surface.
By the arrangement, the control cavity and the medium cavity in the differential pressure valve are completely separated and cannot affect each other.
Specifically, the valve core component is in linkage fit with the upper diaphragm pressing plate, an action spring is arranged between the upper diaphragm pressing plate and the upper end cover, and the action spring forms a certain acting force on the upper diaphragm pressing plate to enable the valve core component and the valve seat to form a sealing fit relation.
With the above arrangement, when the acting spring is not compressed, downward force is formed on the upper and lower diaphragm pressing plates and the valve element assembly, so that a seal is formed between the valve element assembly and the valve seat.
Specifically, the valve core assembly comprises a valve core, a screw hole is formed in the upper end portion of the valve core, and a first bolt piece sequentially penetrates through the upper membrane pressing plate, the elastic membrane and the lower membrane pressing plate to extend into the screw hole to be in threaded connection and fastening with the valve core.
Through the arrangement, the bolt piece stretches into the valve core through the diaphragm assembly and is fastened, linkage fit of the valve core, the diaphragm assembly and the bolt piece is formed, and when the diaphragm assembly is moved under acting force, the valve core and the bolt piece can be driven to move simultaneously.
Specifically, the action spring is a compression spring, the upper end of the first bolt piece forms a spring limiting column positioned in the compression spring, the upper end of the upper end cover forms a round table structure with a small upper part and a large lower part, and the inner wall of the upper end cover limits the upper end of the compression spring.
Through the arrangement, when the diaphragm assembly is jacked up, the compression spring is compressed to drive the valve core assembly to move upwards relative to the valve seat; when the compression spring is not stressed and returns to the original state, the valve core assembly returns to the initial position. In the utility model, when the pressure of LPG in the device is increased to above 0.3MPa, enough acting force is formed on the spring in the differential pressure valve, the valve core component and the diaphragm component move upwards relative to the valve seat, the air in the control cavity is extruded, and then the air enters the oil-gas separator along with the air duct to be recovered.
Specifically, the lower end of the valve core is provided with a guide groove, and a guide rod which is matched with the guide groove in shape and stretches into the guide groove is fixedly arranged on the valve seat.
Through the arrangement, the valve core assembly always moves longitudinally on the same straight line in the moving process, and no transverse offset is generated.
Specifically, the guide rod is a polygonal prism.
Through the arrangement, the valve core cannot generate circumferential rotation in the moving process.
Specifically, the valve core assembly comprises an elastic sealing piece which is fixed at the lower end of the valve core and is in sealing fit with the valve seat.
Through the arrangement, the valve core component is more tightly matched with the valve seat.
Specifically, upper end cover and lower valve body pass through a plurality of bolted connection fastening, be equipped with the through-hole that supplies the bolt to pass on the elastic membrane.
Through the arrangement, the upper end cover, the elastic membrane and the lower valve body are tightly connected together.
Specifically, a mechanical counter for displaying the pressure value in the flowmeter is arranged above the flowmeter.
With the above arrangement, the pressure value in the flowmeter can be visually seen from the mechanical counter.
The beneficial effects of the utility model are as follows:
the utility model adds the oil-gas separator and the differential pressure valve component on the basis of the traditional flow measurement system. The pressure of the control cavity is equal to the air pressure of the upper cavity of the oil-gas separator, if the air exists in the medium cavity, the acting force of the medium cavity to the diaphragm component is equal to the acting force of the control cavity, the valve core component can not be driven to open the differential pressure valve, and the differential pressure valve can be opened only when the air does not exist in the medium cavity, so that the LPG is always metered in a liquid state, the problem that the LPG is unqualified due to gasification is effectively solved, and the metering precision of the LPG is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a differential pressure pump according to the present utility model;
fig. 3 is an enlarged view of a seal structure of the differential pressure pump of the present utility model.
In the figure, the flow meter comprises a 1-flow meter, a 2-filter assembly, a 3-oil-gas separator, a 4-differential pressure valve, a 5-gas guide pipe, a 6-gas guide port, a 7-first bolt piece, an 8-acting spring, a 9-valve core, a 10-valve seat, a 11-control cavity, a 12-diaphragm assembly, a 13-medium cavity, a 14-lower valve body, a 15-guiding groove, a 16-elastic sealing piece, a 17-mechanical counter, a 18-valve core assembly, a 19-upper end cover, a 20-guiding rod, a 21-bolt, a 121-elastic diaphragm, a 122-upper diaphragm pressing plate and a 123-lower diaphragm pressing plate.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.
The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.
1-3, an LPG flow measuring device comprises a flowmeter 1 and a filter assembly 2 communicated with the flowmeter 1, wherein an oil-gas separator 3 is arranged in the filter assembly 2, a differential pressure valve 4 is arranged on the outlet side of the flowmeter 1, the differential pressure valve 4 comprises a differential pressure valve body, a diaphragm assembly 12, a valve core assembly 18 and a valve seat 10 which are arranged in the differential pressure valve body, the diaphragm assembly 12 divides the inner cavity of the differential pressure valve body into a control cavity 11 at the upper end and a medium cavity 13 at the lower end, and an inlet and an outlet which are communicated with the medium cavity 13 are arranged on the differential pressure valve body;
the differential pressure valve body is provided with an air guide port 6, the air guide port 6 is connected with the oil-gas separator 3 through an air guide pipe 5 to enable the control cavity to be communicated with the upper cavity of the oil-gas separator 3, the diaphragm assembly 12 is driven by the differential pressure of the control cavity 11 and the medium cavity 13 to drive the valve core assembly 18 to enable the valve core assembly 18 to move relative to the valve seat 10, so that the inlet and the outlet are communicated or separated.
Through the arrangement, as the control cavity is communicated with the upper cavity of the oil-gas separator, the pressure of the control cavity is equal to the air pressure of the upper cavity of the oil-gas separator, if the medium cavity is provided with air, the acting force of the medium cavity on the diaphragm assembly is equal to the acting force of the control cavity, the valve core assembly cannot be driven to open the differential pressure valve, and only when the medium cavity is not provided with air, the differential pressure valve can be opened.
Specifically, the differential pressure valve body includes an upper end cover 19 and a lower valve body 14 that are connected up and down, and the diaphragm assembly 12 includes an elastic diaphragm 121 with its periphery fixed between the upper end cover 19 and the lower valve body 14, and an upper diaphragm pressing plate 122 and a lower diaphragm pressing plate 123 fixedly disposed on the upper and lower surfaces of the elastic diaphragm 121.
By the arrangement, the control cavity and the medium cavity in the differential pressure valve are completely separated and cannot affect each other.
Specifically, the valve core assembly 18 is in linkage fit with the upper diaphragm pressing plate 122, an acting spring 8 is arranged between the upper diaphragm pressing plate 122 and the upper end cover 19, and the acting spring 8 forms a certain acting force on the upper diaphragm pressing plate 122 to enable the valve core assembly 18 to form a sealing fit relation with the valve seat 10.
With the above arrangement, when the acting spring is not compressed, downward force is formed on the upper and lower diaphragm pressing plates and the valve element assembly, so that a seal is formed between the valve element assembly and the valve seat.
Specifically, the valve core assembly 18 includes a valve core 9, a screw hole is provided at an upper end of the valve core 9, and the first bolt 7 sequentially passes through the upper membrane pressing plate 122, the elastic membrane 121, and the lower membrane pressing plate 123, and extends into the screw hole to be screwed and fastened with the valve core 9.
Through the arrangement, the bolt piece stretches into the valve core through the diaphragm assembly and is fastened, linkage fit of the valve core, the diaphragm assembly and the bolt piece is formed, and when the diaphragm assembly is moved under acting force, the valve core and the bolt piece can be driven to move simultaneously.
Specifically, the acting spring 8 is a compression spring, the upper end of the first bolt member 7 forms a spring limiting column located in the compression spring, the upper end of the upper end cover 19 forms a truncated cone-shaped structure with a small upper part and a large lower part, and the inner wall of the upper end cover 19 limits the upper end of the compression spring.
Through the arrangement, when the diaphragm assembly is jacked up, the compression spring is compressed to drive the valve core assembly to move upwards relative to the valve seat; when the compression spring is not stressed and returns to the original state, the valve core assembly returns to the initial position.
Specifically, a guiding groove 15 is provided at the lower end of the valve core 9, and a guiding rod 20 which is adapted to the shape of the guiding groove 15 and extends into the guiding groove 15 is fixedly provided on the valve seat 10.
Through the arrangement, the valve core assembly always moves longitudinally on the same straight line in the moving process, and no transverse offset is generated.
Specifically, the guide rod 20 is a polygonal prism.
Through the arrangement, the valve core cannot generate circumferential rotation in the moving process.
Specifically, the valve core assembly 18 includes an elastic sealing member 16 fixed at the lower end of the valve core 9 and in sealing engagement with the valve seat 10.
Through the arrangement, the valve core component is more tightly matched with the valve seat.
Specifically, the upper end cover 19 and the lower valve body 14 are connected and fastened by a plurality of bolts 21, and the elastic membrane 121 is provided with a through hole through which the bolts 21 pass.
Through the arrangement, the upper end cover, the elastic membrane and the lower valve body are tightly connected together.
Specifically, a mechanical counter 17 for displaying the pressure value in the flowmeter 1 is installed above the flowmeter 1.
With the above arrangement, the pressure value in the flowmeter can be visually seen from the mechanical counter.
The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (10)
1. The utility model provides a LPG flow measurement device, includes flowmeter (1) and filter subassembly (2) that communicate with flowmeter (1), filter subassembly (2) in install oil and gas separator (3), its characterized in that: the outlet side of the flowmeter (1) is provided with a differential pressure valve (4), the differential pressure valve (4) comprises a differential pressure valve body, a diaphragm assembly (12), a valve core assembly (18) and a valve seat (10) which are arranged in the differential pressure valve body, the diaphragm assembly (12) divides the inner cavity of the differential pressure valve body into a control cavity (11) at the upper end and a medium cavity (13) at the lower end, and the differential pressure valve body is provided with an inlet and an outlet which are communicated with the medium cavity (13);
the differential pressure valve is characterized in that an air guide port (6) is arranged on the valve body of the differential pressure valve, the air guide port (6) is connected with the oil-gas separator (3) through an air guide pipe (5) to enable the control cavity to be communicated with the upper cavity of the oil-gas separator (3), and the diaphragm assembly (12) is driven by the differential pressure of the control cavity (11) and the medium cavity (13) to drive the valve core assembly (18) to enable the valve core assembly (18) to move relative to the valve seat (10) so as to enable the inlet and the outlet to be communicated or separated.
2. The LPG flow measuring device according to claim 1, characterized in that the differential pressure valve body includes an upper end cap (19) and a lower valve body (14) connected up and down, and the diaphragm assembly (12) includes an elastic diaphragm (121) having an outer periphery fixed between the upper end cap (19) and the lower valve body (14), and an upper diaphragm pressing plate (122) and a lower diaphragm pressing plate (123) fixedly provided on upper and lower surfaces of the elastic diaphragm (121).
3. An LPG flow measuring device according to claim 2, characterized in that: the valve core assembly (18) is in linkage fit with the upper diaphragm pressing plate (122), an acting spring (8) is arranged between the upper diaphragm pressing plate (122) and the upper end cover (19), and the acting spring (8) forms a certain acting force on the upper diaphragm pressing plate (122) to enable the valve core assembly (18) to form a sealing fit relation with the valve seat (10).
4. A LPG flow measurement device according to claim 3, characterized in that: the valve core assembly (18) comprises a valve core (9), a screw hole is formed in the upper end portion of the valve core (9), and the first bolt piece (7) sequentially penetrates through the upper membrane pressing plate (122), the elastic membrane (121) and the lower membrane pressing plate (123) to extend into the screw hole to be in threaded connection and fastened with the valve core (9).
5. An LPG flow measuring device as claimed in claim 4, characterized in that: the action spring (8) is a compression spring, a spring limit column positioned in the compression spring is formed at the upper end part of the first bolt piece (7), a truncated cone-shaped structure with a small upper part and a big lower part is formed at the upper end of the upper end cover (19), and the inner wall of the upper end cover (19) limits the upper end part of the compression spring.
6. An LPG flow measuring device as claimed in claim 4, characterized in that: the valve is characterized in that a guide groove (15) is formed in the lower end portion of the valve core (9), and a guide rod (20) which is matched with the guide groove (15) in shape and stretches into the guide groove (15) is fixedly arranged on the valve seat (10).
7. An LPG flow measuring device as claimed in claim 6, characterized in that: the guide rod (20) is a polygonal prism.
8. An LPG flow measuring device as claimed in claim 4, characterized in that: the valve core assembly (18) comprises an elastic sealing piece (16) which is fixed at the lower end of the valve core (9) and is in sealing fit with the valve seat (10).
9. An LPG flow measuring device according to claim 2, characterized in that: the upper end cover (19) and the lower valve body (14) are connected and fastened through a plurality of bolts (21), and the elastic membrane (121) is provided with a through hole for the bolts (21) to pass through.
10. An LPG flow measuring device according to claim 1, characterized in that: a mechanical counter (17) for displaying the pressure value in the flowmeter (1) is arranged above the flowmeter (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320649410.3U CN219757434U (en) | 2023-03-23 | 2023-03-23 | LPG flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320649410.3U CN219757434U (en) | 2023-03-23 | 2023-03-23 | LPG flow measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219757434U true CN219757434U (en) | 2023-09-26 |
Family
ID=88083955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320649410.3U Active CN219757434U (en) | 2023-03-23 | 2023-03-23 | LPG flow measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219757434U (en) |
-
2023
- 2023-03-23 CN CN202320649410.3U patent/CN219757434U/en active Active
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