CN112525410A - Novel filling medium high-temperature melt pressure sensor - Google Patents
Novel filling medium high-temperature melt pressure sensor Download PDFInfo
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- CN112525410A CN112525410A CN202011390198.0A CN202011390198A CN112525410A CN 112525410 A CN112525410 A CN 112525410A CN 202011390198 A CN202011390198 A CN 202011390198A CN 112525410 A CN112525410 A CN 112525410A
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- China
- Prior art keywords
- wall
- connecting seat
- capillary tube
- pressure sensor
- temperature melt
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
Abstract
The invention discloses a novel filling medium high-temperature melt pressure sensor, which belongs to the technical field of high-temperature melt pressure sensors and comprises a shell and a connecting seat, wherein the connecting seat is fixedly connected inside the shell through a screw, a pressure sensing head is fixed on the surface of the connecting seat, a through hole is formed in the surface of the pressure sensing head, and a first capillary tube and a second capillary tube are welded inside the through hole. The device uses the gallium indium tin alloy solution as a filling medium, the gallium indium tin alloy solution is nontoxic, so that the product can be used under the condition of having a nontoxic requirement, the applicability of the product is increased, the gallium indium tin alloy solution has high boiling point and stable performance, the product can be used under the condition of higher temperature and the stable performance of the product can be kept, the gallium indium tin alloy solution has good fluidity and small contractibility, the precision and the stability of the product can be effectively improved, and the quality of the product is optimized.
Description
Technical Field
The invention relates to the technical field of high-temperature melt pressure sensors, in particular to a novel medium-filled high-temperature melt pressure sensor.
Background
The high-temperature melt pressure sensor is mainly used for pressure measurement and control of molten substances under a high-temperature condition, is widely applied to pressure measurement of high-temperature melt, fluid and gas media of equipment such as chemical fiber spinning, polyester rubber, plastic rubber and plastic, extrusion machinery, non-woven fabrics, building packaging materials and the like, and is characterized in that the pressure of the media directly acts on a diaphragm of the sensor to enable the diaphragm to generate micro displacement in direct proportion to the pressure of the media, so that the resistance of the sensor is changed, the change is detected by an electronic circuit, and a standard signal corresponding to the pressure is converted and output;
most of the existing high-temperature solution sensor products are mercury medium filling products, and due to the toxic property and the low boiling point of mercury, the use environment of mercury is limited to a certain extent, and mercury cannot be used in the environment with no toxic requirement and the environment with high temperature (above 350 ℃).
Disclosure of Invention
The invention aims to provide a novel filling medium high-temperature melt pressure sensor, which uses a gallium indium tin alloy solution as a filling medium, wherein the gallium indium tin alloy solution is nontoxic, so that a product can be used under the condition of a nontoxic requirement, the applicability of the product is improved, the gallium indium tin alloy solution has high boiling point and stable performance, the product can be used under the condition of higher temperature and the stable performance of the product can be kept, and the problem that a mercury filling medium cannot be used under the environment with a nontoxic requirement and the environment with higher temperature (more than 350 ℃) in the background technology is solved.
In order to achieve the purpose, the invention provides the following technical scheme: a novel filling medium high-temperature melt pressure sensor comprises a shell and a connecting seat, wherein the connecting seat is fixedly connected to the inside of the shell through a screw, a pressure sensing head is fixed on the surface of the connecting seat, a through hole is formed in the surface of the pressure sensing head, a first capillary tube and a second capillary tube are welded in the through hole, and the second capillary tube penetrates through the surface of the connecting seat;
a hose joint is welded at one end of the connecting seat, a hose is connected at one end of the hose joint in a cold pressing mode, a hose hexagonal joint is connected at one end of the hose in a cold pressing mode, a rear intercepting rod is welded at one end of the hose hexagonal joint, a threaded rod is welded at one end of the rear intercepting rod, the second capillary tube penetrates through the hose, the rear intercepting rod and the threaded rod, one end of the second capillary tube is welded on the inner wall of the threaded rod, a cover membrane is welded on the inner wall of the threaded rod, and gallium-indium-tin alloy solution filling layers are filled in the inner walls of the first capillary tube and the second capillary tube;
one end of the first capillary tube extends out of the pressure sensing head, a sealing pin is inserted into an inner cavity of the first capillary tube, an end cover is welded at one end of the sealing pin, the outer wall of the first capillary tube is of an external thread structure, the end cover is of an internal thread structure, and the end cover is in threaded connection with the first capillary tube;
the one end welding of pressure sensing head has the elastomer, the surface bonding of elastomer has the foil gage, the surface of connecting seat is fixed with the compensating plate through the cross recess screw, the inner wall of casing passes through screw fixedly connected with upper cover, the surface mounting of upper cover has the circuit mounting panel, the surface mounting of upper cover has aviation plug-in components.
Preferably, the outer wall of the upper cover is sleeved with a first gasket, the outer wall of the connecting seat is sleeved with a second gasket, and the first gasket and the second gasket are in contact with the inner wall of the shell.
Preferably, the circuit mounting plate is fixedly connected to the surface of the upper cover through screws, and the side surface of the circuit mounting plate is in contact with the inner wall of the housing.
Preferably, the aviation plug-in and the circuit mounting plate are connected through silica gel wires, and the circuit mounting plate and the compensation plate are connected through silica gel wires.
Preferably, the outer wall of the cross-shaped groove screw is in threaded connection with a hexagon nut, and the hexagon nut is in contact with the surface of the compensation plate.
Preferably, the diameter of the upper cover and the outer diameter of the connecting seat are the same as the inner diameter of the shell.
Preferably, the inner diameters of the first capillary and the second capillary are 1.6-2.0 mm, and the diameter of the seal pin is 1.4-1.8 mm.
Preferably, the top surface of the end cap is arranged in a regular hexagon structure, and the inner wall of the end cap is in contact with the outer wall and the top end of the first capillary.
Compared with the prior art, the invention has the beneficial effects that:
the device uses the gallium indium tin alloy solution as a filling medium, the gallium indium tin alloy solution is nontoxic, so that the product can be used under the condition of having a nontoxic requirement, the applicability of the product is increased, the gallium indium tin alloy solution has high boiling point and stable performance, the product can be used under the condition of higher temperature and the stable performance of the product can be kept, the gallium indium tin alloy solution has good fluidity and small contractibility, the precision and the stability of the product can be effectively improved, and the quality of the product is optimized.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is an enlarged view of region A of FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of region B of FIG. 1 according to the present invention;
fig. 4 is a schematic view of a connection structure of a first capillary and a seal pin according to the present invention.
In the figure: 1. a housing; 2. a hose connector; 3. a hose; 4. a hose hexagonal joint; 5. a rear cutting rod; 6. a threaded rod; 7. a cover membrane; 8. a screw; 9. an aviation plug-in; 10. an upper cover; 11. a first gasket; 12. a circuit mounting board; 13. a silica gel wire; 14. a pressure sensing head; 15. an elastomer; 16. a compensation plate; 17. a first capillary tube; 18. a second capillary tube; 19. a connecting seat; 20. a second gasket; 21. a seal pin; 22. and (4) end covers.
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 to 4, the present invention provides a technical solution: a novel filling medium high-temperature melt pressure sensor comprises a shell 1 and a connecting seat 19;
the connecting seat 19 is fixedly connected to the inside of the shell 1 through a screw 8, the pressure sensing head 14 is fixed on the surface of the connecting seat 19, a through hole is formed in the surface of the pressure sensing head 14, a first capillary tube 17 and a second capillary tube 18 are welded inside the through hole, the second capillary tube 18 penetrates through the surface of the connecting seat 19, and the first capillary tube 17 and the second capillary tube 18 are made of 304 stainless steel;
the one end welding of connecting seat 19 has hose nipple 2, the one end cold pressing of hose nipple 2 is connected with hose 3, the one end cold pressing of hose 3 is connected with hose hexagonal joint 4, the one end welding of hose hexagonal joint 4 has back kelly 5, the one end welding of back kelly 5 has threaded rod 6, second capillary 18 runs through the hose 3, the inside of back kelly 5 and threaded rod 6, the one end of second capillary 18 is welded in the inner wall of threaded rod 6, the inner wall welding of threaded rod 6 has lid diaphragm 7, the inner wall filling of first capillary 17 and second capillary 18 has gallium indium tin alloy solution filling layer, gallium indium tin alloy solution has the characteristics of non-toxicity, high boiling point and good mobility, can use under the condition that there is non-toxicity requirement, and gallium indium tin alloy solution's contractility is little, can effectual improvement precision and the stability of product, optimize the quality of product;
one end of the first capillary 17 extends out of the pressure sensing head 14, a sealing pin 21 is inserted into an inner cavity of the first capillary 17, an end cover 22 is welded at one end of the sealing pin 21, the outer wall of the first capillary 17 is of an external thread structure, the end cover 22 is of an internal thread structure, the end cover 22 is in threaded connection with the first capillary 17, the sealing pin 21 is fixed inside the first capillary 17 through the end cover 22 in a threaded connection mode, the inner diameters of the first capillary 17 and the second capillary 18 are 1.6-2.0 mm, the diameter of the sealing pin 21 is 1.4-1.8 mm, the top surface of the end cover is of a regular hexagon structure, the inner wall of the end cover 22 is in contact with the outer wall and the top end of the first capillary 17, the sealing performance of the first capillary 17 can be improved, compared with the traditional argon arc welding method, the method is safer and quicker, the highest sealing range can reach 300MPa, the material of the sealing pin 21 and the end cover 22 is 303 stainless steel;
an elastic body 15 is welded at one end of the pressure sensing head 14, a strain gauge is bonded on the surface of the elastic body 15, a compensation plate 16 is fixed on the surface of a connecting seat 19 through a cross recessed screw, a hexagon nut is connected with the outer wall of the cross recessed screw in a threaded manner, the hexagon nut is in contact with the surface of the compensation plate 16, the compensation plate 16 is fixed to prevent the compensation plate 16 from sliding on the outer wall of the cross recessed screw, an upper cover 10 is fixedly connected to the inner wall of the shell 1 through a screw 8, a circuit mounting plate 12 is mounted on the surface of the upper cover 10, an aviation plug-in unit 9 is mounted on the surface of the upper cover 10, the aviation plug-in unit 9 is connected with the circuit mounting plate 12 and the circuit mounting plate 12 is connected with the compensation plate 16 through a silica gel lead 13, and the silica gel lead 13 has excellent high-temperature and low-;
the outer wall of the upper cover 10 is sleeved with a first gasket 11, the outer wall of the connecting seat 19 is sleeved with a second gasket 20, the first gasket 11 and the second gasket 20 are in contact with the inner wall of the shell 1, and the diameter of the upper cover 10 and the outer diameter of the connecting seat 19 are the same as the inner diameter of the shell 1, so that the airtightness inside the shell 1 is improved, and components inside the shell 1 are protected;
the circuit mounting plate 12 is fixedly connected to the surface of the upper cover 10 through a screw 8, the side surface of the circuit mounting plate 12 is in contact with the inner wall of the shell 1, the surface of the circuit mounting plate 12 is provided with an amplifying circuit, the amplifying circuit is connected with a power supply, the amplifying circuit can amplify input micro signals, and the amplifying circuit has the advantages of being simple in structure, convenient to integrate and the like.
The structure principle is as follows: the pressure of the gallium indium tin alloy solution directly acts on the surface of the cover diaphragm 7, so that the cover diaphragm 7 and the pressure of the gallium indium tin alloy solution medium are in direct proportion to perform micro displacement, the resistance is changed, an amplifying circuit fixed on the surface of the circuit mounting plate 12 amplifies output signals, the gallium indium tin alloy solution has the characteristics of no toxicity, high boiling point and good fluidity, can be used under the condition of no toxicity requirement, and has small contractibility, the precision and the stability of a product can be effectively improved, and the quality of the product is optimized.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a novel fill medium high temperature melt pressure sensor, includes casing (1), connecting seat (19), its characterized in that: the connecting seat (19) is fixedly connected to the inside of the shell (1) through a screw (8), a pressure sensing head (14) is fixed on the surface of the connecting seat (19), a through hole is formed in the surface of the pressure sensing head (14), a first capillary tube (17) and a second capillary tube (18) are welded inside the through hole, and the second capillary tube (18) penetrates through the surface of the connecting seat (19);
the welding of the one end of connecting seat (19) has hose nipple (2), the one end of hose nipple (2) is colded pressing and is connected with hose (3), the one end of hose (3) is colded pressing and is connected with hose hexagonal joint (4), the welding of the one end of hose hexagonal joint (4) has back kelly (5), the welding of the one end of back kelly (5) has threaded rod (6), second capillary (18) run through in the inside of hose (3), back kelly (5) and threaded rod (6), the welding of the one end of second capillary (18) is in the inner wall of threaded rod (6), the welding of the inner wall of threaded rod (6) has lid diaphragm (7), the inner wall filling of first capillary (17) and second capillary (18) has gallium indium tin alloy solution filling layer;
one end of the first capillary tube (17) extends out of the pressure sensing head (14), a sealing pin (21) is inserted into an inner cavity of the first capillary tube (17), an end cover (22) is welded at one end of the sealing pin (21), the outer wall of the first capillary tube (17) is of an external thread structure, the end cover (22) is of an internal thread structure, and the end cover (22) is in threaded connection with the first capillary tube (17);
the one end welding of pressure sensing head (14) has elastomer (15), the surface bonding of elastomer (15) has the foil gage, the surface of connecting seat (19) is fixed with compensating plate (16) through the cross recess screw, the inner wall of casing (1) passes through screw (8) fixedly connected with upper cover (10), the surface mounting of upper cover (10) has circuit mounting panel (12), the surface mounting of upper cover (10) has aviation plug-in components (9).
2. The novel filled medium high-temperature melt pressure sensor according to claim 1, wherein: the outer wall of the upper cover (10) is sleeved with a first gasket (11), the outer wall of the connecting seat (19) is sleeved with a second gasket (20), and the first gasket (11) and the second gasket (20) are in contact with the inner wall of the shell (1).
3. The novel filled medium high-temperature melt pressure sensor according to claim 1, wherein: the circuit mounting plate (12) is fixedly connected to the surface of the upper cover (10) through a screw (8), and the side surface of the circuit mounting plate (12) is in contact with the inner wall of the shell (1).
4. The novel filled medium high-temperature melt pressure sensor according to claim 1, wherein: the aviation plug-in (9) is connected with the circuit mounting plate (12) and the circuit mounting plate (12) is connected with the compensation plate (16) through silica gel conducting wires (13).
5. The novel filled medium high-temperature melt pressure sensor according to claim 1, wherein: the outer wall of the cross-shaped groove screw is connected with a hexagon nut in a threaded mode, and the hexagon nut is in contact with the surface of the compensation plate (16).
6. The novel filled medium high-temperature melt pressure sensor according to claim 1, wherein: the diameter of the upper cover (10) and the outer diameter of the connecting seat (19) are the same as the inner diameter of the shell (1).
7. The novel filled medium high-temperature melt pressure sensor according to claim 1, wherein: the inner diameters of the first capillary tube (17) and the second capillary tube (18) are 1.6-2.0 mm, and the diameter of the seal pin (21) is 1.4-1.8 mm.
8. The novel filled medium high-temperature melt pressure sensor according to claim 1, wherein: the top surface of the end cover is arranged to be a regular hexagon structure, and the inner wall of the end cover (22) is in contact with the outer wall and the top end of the first capillary (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011390198.0A CN112525410A (en) | 2020-12-02 | 2020-12-02 | Novel filling medium high-temperature melt pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011390198.0A CN112525410A (en) | 2020-12-02 | 2020-12-02 | Novel filling medium high-temperature melt pressure sensor |
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| Publication Number | Publication Date |
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| CN112525410A true CN112525410A (en) | 2021-03-19 |
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| CN202011390198.0A Pending CN112525410A (en) | 2020-12-02 | 2020-12-02 | Novel filling medium high-temperature melt pressure sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923621A (en) * | 2022-03-09 | 2022-08-19 | 上海申狮物联网科技有限公司 | Cavity type mounting structure high-temperature melt pressure sensor |
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2020
- 2020-12-02 CN CN202011390198.0A patent/CN112525410A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923621A (en) * | 2022-03-09 | 2022-08-19 | 上海申狮物联网科技有限公司 | Cavity type mounting structure high-temperature melt pressure sensor |
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