CN114646420A - Pressure transmitter with high reliability - Google Patents
Pressure transmitter with high reliability Download PDFInfo
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- CN114646420A CN114646420A CN202210542582.0A CN202210542582A CN114646420A CN 114646420 A CN114646420 A CN 114646420A CN 202210542582 A CN202210542582 A CN 202210542582A CN 114646420 A CN114646420 A CN 114646420A
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- pressure sensor
- section
- sensor core
- pressure
- pressure transmitter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/141—Monolithic housings, e.g. molded or one-piece housings
Abstract
The invention relates to the field of pressure transmitters, in particular to a high-reliability pressure transmitter, which comprises a shell, wherein the shell is connected with a socket component and a connecting pipe component, a pressure sensor core body is also arranged in the connecting pipe component, and a connecting passage is established between the pressure sensor core body and the socket component by adopting a rigid-flexible combined plate; the connecting pipe component comprises a sensor cavity and a flow channel cavity, the pressure sensor core body is arranged in the sensor cavity, a stitch through groove is further formed in the connecting pipe component, a stitch of the pressure sensor core body penetrates through the connecting pipe to be connected with the rigid-flexible combined plate, and the center point of the orthographic projection of the stitch through groove penetrating port and the center point of the orthographic projection of the penetrating port are staggered on the sensing surface perpendicular to the pressure sensor core body. The high-reliability pressure transmitter effectively prevents acting force generated by thermal expansion of all components of the pressure transmitter such as sealant and the like from being vertically transmitted downwards through pins of the core body of the pressure sensor, thereby improving the data acquisition precision in practical use.
Description
Technical Field
The invention relates to the field of pressure transmitters, in particular to a high-reliability pressure transmitter.
Background
A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. The pressure sensor can convert physical pressure parameters of gas, liquid and the like sensed by the pressure element sensor into standard electric signals (such as 4-20 mADC and the like) so as to supply secondary instruments such as an indication alarm instrument, a recorder, a regulator and the like for measurement, indication and process regulation.
Pressure transmitters typically operate in environments with high temperatures and pressures where the components are susceptible to "expansion with heat and contraction with cold". Particularly, under the condition that the pressure transmitter is filled with the sealant, the core body part of the pressure sensor of the pressure transmitter is more or less extruded when the sealant is thermally expanded, so that the positioning of the sensing surface deviates from the preset position, and the condition that the pressure transmitter detects inaccurate pressure data occurs.
There is a need for a pressure transmitter that improves the reliability of the pressure data it senses in actual use.
Disclosure of Invention
The invention aims to: aiming at the existing pressure transmitter used in the prior art, the common working environment of the pressure transmitter is under high temperature and high pressure, and the components of the pressure transmitter easily generate the effect of expansion with heat and contraction with cold under the environment. Particularly, under the condition that the pressure transmitter is filled with the sealant, the sealant can more or less extrude the core body part of the pressure sensor of the pressure transmitter when the sealant is thermally expanded, so that the positioning of the sensing surface deviates from the preset position, the problem that the pressure transmitter detects the inaccurate pressure data occurs, and the pressure transmitter with high reliability is provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a pressure transmitter of high reliability, includes the casing, be connected with socket part and takeover part on the casing, socket part be used for transmitting electric signal and with higher level system interface connection, takeover part is used for being connected and drainage pressure medium with pressure system still be provided with the pressure sensor core in the takeover part and gather takeover part drainage pressure medium's pressure signal, the pressure sensor core with adopt the soft or hard board that combines to establish the connecting channel between the socket part, transmit the pressure signal that the pressure sensor core gathered.
Preferably, the rigid-flexible printed circuit board is disposed to separate the side wall of the housing.
Preferably, the rigid-flex board includes a first connecting portion, a second connecting portion and a signal processing portion, the first connecting portion is connected to the socket component, the second connecting portion is connected to the pressure sensor core, the signal processing portion is disposed between the first connecting portion and the second connecting portion, and the signal processing portion is connected to the first connecting portion and the second connecting portion through a flexible board.
Preferably, the connection surface of the first connection portion is vertically connected to the pins of the socket member, and the connection surface of the second connection portion is vertically connected to the pins of the pressure sensor core.
Preferably, the area of the first connecting part connecting surface is larger than the area of the pin packaging surface of the socket component, and the area of the second connecting part connecting surface is larger than the area of the pin packaging surface of the pressure sensor core.
Preferably, the signal processing section is perpendicular to the first connection section and the second connection section.
Preferably, after the signal processing unit is connected to the first connecting unit and the second connecting unit, the flexible printed circuit board is bent into an arc shape.
Preferably, the casing is further poured with a pouring sealant to fix the rigid-flexible printed circuit board.
Preferably, the pouring sealant covers the pressure sensor core body, and the pouring amount is greater than 2/3 of the capacity of the shell body.
Preferably, a groove is further formed in the inner wall of the shell and used for increasing the contact area between the potting adhesive and the inner wall of the shell.
Preferably, the socket part and the nipple part are connected to the housing by laser welding.
Preferably, the connecting pipe component comprises a sensor cavity and a flow channel cavity, the pressure sensor core body is arranged in the sensor cavity, the sensing surface of the pressure sensor core body corresponds to the flow channel cavity, a pin penetrating groove is further formed in the connecting pipe component and is communicated with the sensor cavity and the inside of the shell, the pin of the pressure sensor core body penetrates through the pin and is connected with the rigid-flexible combined plate, and the pin penetrating groove is perpendicular to the sensing surface of the pressure sensor core body, and the central point of the orthographic projection of the penetrating port of the pin is staggered with the central point of the orthographic projection of the penetrating port of the pin.
Preferably, the stitch threading groove comprises a threading section, a threading section and an inclined section, the threading section and the threading section are vertically arranged, the inclined section is arranged between the threading section and the threading section, and a central axis of the inclined section forms an obtuse angle with a connecting line between central axes of the threading section and a connecting line between central axes of the threading section.
Preferably, the diameter of the inclined section is smaller than the diameter of the penetration section and the penetration section.
Preferably, a rubber lining is further arranged in the inclined section and used for reducing the diameter of the inclined section, so that the inner wall of the inclined section is attached to a pin of the pressure sensor core.
Preferably, an extension section is further arranged on the piercing section, and the extension section is arranged on one side of the piercing outlet deviating from the piercing outlet of the piercing section.
Preferably, the length of the exit section is greater than the length of the entry section.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the high-reliability pressure transmitter is arranged on the sensing surface vertical to the pressure sensor core body, and the central point of the orthographic projection of the pin through groove penetrating port and the central point of the orthographic projection of the penetrating port are staggered. Therefore, acting force generated by thermal expansion of all components of the pressure transmitter such as the sealant is effectively prevented from being transmitted vertically downwards through pins of the core body of the pressure sensor. The acting force of the pins of the pressure sensor core body directly pushing the sensing surface of the pressure sensor core body is reduced, so that the offset of the sensing surface of the pressure sensor core body is reduced, or the offset of the sensing surface part of the pressure sensor core body is avoided, and the data acquisition precision in the practical use of the pressure sensor core body is improved;
2. according to the high-reliability pressure transmitter, the pin through groove comprises a penetrating section, a penetrating section and an inclined section, the penetrating section and the penetrating section are vertically arranged, the inclined section is arranged between the penetrating section and the penetrating section, and a connecting line between a central axis of the inclined section and a central axis of the penetrating section and a connecting line between central axes of the penetrating section form an obtuse angle. When the stitch of the pressure sensor core body transmits the acting force generated by the thermal expansion of the sealant, the original vertical downward force can generate a component force in the horizontal direction due to the blocking of the inclined section, so that the acting force of the stitch of the pressure sensor core body directly pushing the sensing surface of the pressure sensor core body is reduced. Further, in such a structural arrangement, the pins of the pressure sensor core body are in a bent state, and the pins are easily deformed at the joint of the piercing section and the inclined section during the force transmission process, so that a part of downward transmitted acting force can be counteracted. Furtherly again, when the stitch is in wear out the section with when deformation appears in the position of slope section handing-over, the stitch is located the trend that the part in the slope section can produce the deformation displacement, is in when the stitch wear out the section with when the deformation of the position of slope section handing-over reaches the certain degree, be located in the slope section some of the stitch of pressure sensor core support the inner wall of slope section further blocks the effort of the downward transmission that produces because sealed glue each component part thermal expansion of pressure transmitter such as. Therefore, the offset of the sensing surface of the core body of the pressure sensor is reduced or avoided, and the data acquisition precision of the pressure sensor in practical use is further improved. Meanwhile, the pins of the pressure sensor core body can be more conveniently inserted into the pin through grooves after the arrangement, so that the practicability of the pressure sensor core body in practical application is improved;
3. according to the high-reliability pressure transmitter, the soft and hard combination board is adopted between the pressure sensor core body and the socket component to establish the connection path, so that the lead connection procedure is reduced, the assembly is simpler, and the connection of an electric appliance is more reliable.
Drawings
FIG. 1 is a schematic diagram of a highly reliable pressure transmitter;
FIG. 2 is a schematic view of the lower half of FIG. 1;
FIG. 3 is a schematic view of the structure of A in FIG. 1;
FIG. 4 is a schematic diagram of a cutaway configuration of a high reliability pressure transmitter;
FIG. 5 is a schematic view of the lower half of FIG. 4;
fig. 6 is a schematic structural view of B in fig. 4.
The labels in the figure are: the sensor comprises a shell 1, a socket 2, a connecting pipe 3, a pressure sensor core 4, a rigid-flexible board 5, a first connecting part 6, a second connecting part 7, a signal processing part 8, a pouring sealant 9, a groove 10, a flexible board 11, a sensor cavity 12, a flow channel cavity 13, a pin through groove 14, a pin through section 15, a penetrating section 16, a penetrating section 17, an inclined section 18, a rubber lining 18 and an extension section 19.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1 to 6, the high-reliability pressure transmitter of the present invention includes a housing 1, wherein the housing 1 is connected with a socket component 2 and a connection pipe component 3, the socket component 2 is used for transmitting an electrical signal and is connected with an interface of a higher-level system, the connection pipe component 3 is used for being connected with a pressure system and guiding a pressure medium, a pressure sensor core 4 is further disposed in the connection pipe component 3 for collecting a pressure signal of the pressure medium guided by the connection pipe component 3, and a soft-hard combined board 5 is employed between the pressure sensor core 4 and the socket component 2 to establish a connection path and transmit the pressure signal collected by the pressure sensor core 4.
According to the high-reliability pressure transmitter, the soft-hard combination board 5 is adopted between the pressure sensor core body 4 and the socket component 2 to establish a connecting passage, so that the lead connecting process is reduced, the assembly is simpler, and the connection of electric appliances is more reliable.
Specifically, the inventor considers that, in the conventional manufacturing process of the pressure transducer package, the electrical connections between the pressure sensor core 4 and the printed circuit board and between the printed circuit board and the connector are all connected by wires, and the wire stripping, fixing, and soldering processes are relatively complicated, and the production efficiency is relatively low. And when the pressure transmitter is impacted, the lead inside the pressure transmitter is more easily broken under the action of inertia force. Therefore, in the present embodiment, the inventor uses the rigid-flex board 5 to establish a connection path between the pressure sensor core 4 and the socket component 2, thereby reducing the wire connection process, making the assembly simpler and making the electrical connection more reliable.
In this embodiment, it should be noted that the rigid-flex board 5 is a flexible circuit board and a rigid circuit board, and the flexible circuit board and the rigid circuit board are combined together according to the related process requirements through processes such as pressing, and the like, so as to form a circuit board with FPC characteristics and PCB characteristics.
Example 2
As shown in fig. 1 to 6, in the pressure transmitter with high reliability according to the present invention, in addition to the above manner, the rigid-flexible board 5 is disposed to separate the side wall of the housing 1.
In the present embodiment, the inventor considers that the practical environment of the pressure transmitter is generally relatively severe, and the internal circuit is easily broken by the impact of the external force, so that the pressure transmitter itself is required to have good vibration resistance. Based on this, the inventor set the rigid-flex board 5 apart from the side wall of the housing 1. Therefore, the pressure transmitter is prevented from directly transmitting the impact force to the rigid-flexible board 5 when being impacted by the external force, and the reliability of the invention in practical use is further improved.
In a preferred embodiment, in addition to the above-described mode, the rigid-flex board 5 further includes a first connecting portion 6, a second connecting portion 7, and a signal processing portion 8, the first connecting portion 6 is connected to the socket member 2, the second connecting portion 7 is connected to the pressure sensor core 4, the signal processing portion 8 is disposed between the first connecting portion 6 and the second connecting portion 7, and the signal processing portion 8 is connected to the first connecting portion 6 and the second connecting portion 7 through a flexible board 11.
The flexible circuit board is a printed circuit with high reliability and excellent flexibility, which is made of polyester film or polyimide as a base material. The circuit can be bent at will, and compared with a printed circuit board, the circuit has a more flexible application scene. But, due to its soft and deformable nature, flexible circuit boards are not suitable for use in connection with other electrical components, the first connection portion 6 and the second connection portion 7 are provided as hard plates in this embodiment, the signal processing part 8 is connected with the first connecting part 6 and the second connecting part 7 through a soft board 11, which is connected with the socket part 2 and the pressure sensor core 4, so that the connection stability among the components is enhanced, meanwhile, a signal processing part 8 is provided to be connected with the first connecting part 6 and the second connecting part 7 through a flexible board 11, and the inventor also considers that, when the socket component 2 and the pressure sensor core 4 deform, the soft board 11 can offset the deformation, and the deformation is prevented from being transmitted to the signal processing part 8, so that the signal processing part 8 is prevented from being damaged. By adopting the structure, the reliability of the invention in practical use is further improved.
In a preferred embodiment, in addition to the above-described mode, a connection surface of the first connection portion 6 is perpendicularly connected to the lead pins of the socket member 2, and a connection surface of the second connection portion 7 is perpendicularly connected to the lead pins of the pressure sensor core 4. With this arrangement, on the one hand, the area of the connection surface is increased, so that the connection between the socket member 2 and the pressure sensor core 4 and the rigid-flex board 5 is more stable. On the other hand, when the socket part 2 and the pressure sensor core 4 shake under the action of external force, the uneven loosening of the connection point is avoided, and the reliability of the invention in practical use is further improved.
In a preferred embodiment, in addition to the above manner, the first connecting portion 6 has a connecting surface area larger than the pin package surface area of the socket component 2, and the second connecting portion 7 has a connecting surface area larger than the pin package surface area of the pressure sensor core 4. By adopting the structure, on one hand, the difficulty in assembling the invention is reduced, and the production efficiency can be effectively improved. On the other hand, the first connecting portion 6 and the second connecting portion 7 have better structural strength, and can resist the deformation of the socket component 2 and the pressure sensor core body 4 to a greater extent, and the reliability of the invention in practical use is further improved.
As a preferred embodiment, in addition to the above mode, further, the signal processing section 8 is disposed perpendicular to the first connection section 6 and the second connection section 7.
In the present embodiment, the inventor considers that, in the above-described scheme, the signal processing section 8 is connected to the first connecting section 6 and the second connecting section 7 through the flexible board 11. The signal processing part 8 can be effectively prevented from being damaged by upward transmission of deformation force, and the reliability of the invention in practical use is improved. However, there is still a disadvantage that the deformation force, when transmitted to the flexible board 11, may cause the flexible board 11 to break if the flexible board 11 is in a stretched or twisted state. Therefore, in this embodiment, the inventor sets the signal processing unit 8 perpendicular to the first connecting unit 6 and the second connecting unit 7, so that the flexible board 11 is in a natural and straight state after being connected to the signal processing unit 8, the first connecting unit 6, and the second connecting unit 7, thereby preventing the deformation force from being broken due to uneven stress of the flexible board 11 when the deformation force is transmitted to the flexible board 11, and further improving the reliability of the present invention in practical use.
In a preferred embodiment, in addition to the above-mentioned mode, after the signal processing unit 8 is connected to the first connection unit 6 and the second connection unit 7, the flexible board 11 is bent in an arc shape. With this arrangement, the soft plate 11 can better absorb the impact force applied to the pressure transmitter during use, and the soft plate 11 is prevented from being damaged during impact force absorption, thereby further improving the reliability of the present invention in practical use.
Example 3
As shown in fig. 1 to fig. 6, in the pressure transmitter with high reliability according to the present invention, based on the above manner, further, the casing 1 is further filled with a potting adhesive 9, so that the rigid-flexible board 5 is fixed.
In order to increase the vibration resistance of the pressure transmitter, a special support is designed to fix the printed circuit board during actual use, which results in a complicated structure inside the pressure transmitter, increases the probability of failure of the pressure transmitter during actual use, and increases the difficulty of mounting the printed circuit board during later assembly. Therefore, in this embodiment, the inventor pours the potting adhesive 9 into the housing 1, and fixes the rigid-flexible printed circuit board 5 by using the potting adhesive 9. On one hand, the rigid-flex board 5 is more firmly connected with the socket component 2 and the pressure sensor core 4, and meanwhile, the mechanical properties of vibration resistance and impact resistance of the invention are greatly improved.
In a preferred embodiment, based on the above manner, the potting adhesive 9 covers the pressure sensor core 4 and is poured by an amount greater than 2/3 of the capacity of the housing 1.
In the present embodiment, the inventor considers that the pressure sensor core 4 will bear the impact of the pressure medium in use, and the structural stability of the core itself plays an important role in the reliability of the actual use of the present invention as a whole. Therefore, in this embodiment, the inventor sets up the pouring sealant 9 to cover the pressure sensor core 4, thereby effectively ensuring that the structure of the pressure sensor core 4 is stable, and further, the pouring amount is set to be greater than 2/3 of the capacity of the shell 1, so that the degree of freedom of the rigid-flex board 5 is reduced, and the rigid-flex board 5 is effectively prevented from shaking under the action of external force. The reliability of the invention in practical use is further improved.
As a preferred embodiment, on the basis of the above manner, a groove 10 is further provided on the inner wall of the housing 1, and the groove 10 is used for increasing the contact area between the potting adhesive 9 and the inner wall of the housing 1.
As a preferred embodiment, in addition to the above manner, further, the socket part 2 and the adapter part 3 are connected to the housing 1 by laser welding. The shell 1, the connecting pipe component 3 and the socket component 2 are connected to form a fully-closed structure by adopting a laser welding process, so that the EMC performance of the invention is effectively improved.
Example 4
As shown in fig. 1 to 6, based on the above manner, the connection pipe component 3 further includes a sensor cavity 12 and a flow channel cavity 13, the pressure sensor core 4 is disposed in the sensor cavity 12, a sensing surface of the pressure sensor core 4 is disposed corresponding to the flow channel cavity 13, a pin through groove 14 is further disposed in the connection pipe component 3, the pin through groove 14 communicates with the sensor cavity 12 and the inside of the housing 1, and is used for connecting a pin of the pressure sensor core 4 with the rigid-flexible board 5, and on the sensing surface perpendicular to the pressure sensor core 4, a central point of a forward projection of an inlet of the pin through groove 14 is staggered from a central point of a forward projection of an outlet of the pin through groove.
In particular, in the present embodiment, the inventor considers that the pressure transmitter usually works under high temperature and high pressure, and the components of the pressure transmitter are easy to generate the effect of expansion with heat and contraction with cold. Particularly, under the condition that the shell 1 is filled with the sealant, the pressure sensor core body 4 is more or less extruded by the heat expansion of the sealant, and in the process, the pins of the pressure sensor core body 4 can transmit the acting force generated by the heat expansion of the sealant to the sensing surface of the pressure sensor core body 4, so that the positioning of the sensing surface deviates from the preset position, and the condition that the pressure sensor core body 4 detects inaccurate pressure data occurs. Based on this, in the present embodiment, the inventor sets the sensing surface perpendicular to the pressure sensor core 4, and the center point of the orthographic projection of the pin through slot 14 and the center point of the orthographic projection of the through hole are staggered. Therefore, acting force generated by thermal expansion of all components of the pressure transmitter such as the sealant is effectively prevented from being transmitted vertically downwards through pins of the pressure sensor core body 4. The acting force of the pin of the pressure sensor core body 4 directly pushing the sensing surface of the pressure sensor core body 4 is reduced, so that the offset of the sensing surface of the pressure sensor core body 4 is reduced, or the offset of the sensing surface of the pressure sensor core body 4 is avoided, and the data acquisition precision in practical use is improved.
As a preferable embodiment, based on the above manner, further, the pin penetrating groove 14 includes a penetrating section 15, a penetrating section 16 and an inclined section 17, the penetrating section 15 and the penetrating section 16 are vertically arranged, the inclined section 17 is arranged between the penetrating section 15 and the penetrating section 16, and a connecting line between a central axis of the inclined section 17 and a central axis of the penetrating section 15 and a connecting line between central axes of the penetrating section 16 form an obtuse angle.
Specifically, in this embodiment, when the pins of the pressure sensor core 4 transmit the acting force generated by the thermal expansion of the sealant, the force originally transmitted vertically downward will generate a component force in the horizontal direction due to the blocking of the inclined section 17, so as to reduce the acting force of the pins of the pressure sensor core 4 directly pushing the sensing surface of the pressure sensor core 4. Further, in such a structural arrangement, the stitch of the pressure sensor core 4 may be in a bent state, and the stitch may be easily deformed at the joint of the piercing section 16 and the inclined section 17 during the transmission of the force, so as to counteract a part of the downward force. Still further, when the stitch is in wear out section 16 with when deformation appears in the position of slope section 17 handing-over, the stitch is located the trend that the part in the slope section 17 can produce the deformation displacement, is in when the stitch wear out section 16 with when the deformation of the position of slope section 17 handing-over reaches certain degree, be located in the slope section 17 some of the stitch of pressure sensor core 4 support and support the inner wall of slope section 17 further blocks the effort of the downward transmission that produces because each component part thermal expansion of pressure transmitter such as sealed glue. Therefore, the deviation of the sensing surface of the pressure sensor core body 4 is reduced or avoided, and the data acquisition precision of the pressure sensor core body in practical use is further improved. Meanwhile, the arrangement is more convenient for the pins of the pressure sensor core body 4 to penetrate into the pin penetrating grooves 14, and the practicability of the invention in practical application is improved.
As a preferred embodiment, based on the above manner, further, the diameter of the inclined section 17 is smaller than the diameter of the penetration section 16 and the penetration section 15. By adopting the structure, the triggering condition that the stitch of the pressure sensor core body 4 in the inclined section 17 deforms to abut against the inner wall of the inclined section 17 is weakened, so that the offset of the sensing surface of the pressure sensor core body 4 is reduced, or the offset of the sensing surface part of the pressure sensor core body 4 is avoided, and the data acquisition precision in the practical use of the invention is further improved.
In a preferred embodiment, in addition to the above-mentioned mode, a rubber lining 18 is further provided in the inclined section 17, and the rubber lining 18 is used for reducing the diameter of the inclined section 17 so as to make the inner wall of the inclined section 17 fit with the pins of the pressure sensor core 4.
In the above embodiment, the inventor sets the diameter of the inclined section 17 to be smaller than the diameters of the piercing section 16 and the piercing section 15, so as to weaken the triggering condition that the stitch of the pressure sensor core 4 in the inclined section 17 deforms against the inner wall of the inclined section 17, thereby further improving the data acquisition precision of the invention in practical use. The stitch of the pressure sensor core body 4 and the inclined section 17 are made of hard materials, so that friction force generated after the stitch of the pressure sensor core body 4 and the inclined section 17 are contacted is small, the stitch of the pressure sensor core body 4 still has a sliding tendency after being abutted against the inner wall of the inclined section 17, and a part of acting force generated by thermal expansion of all components of a pressure transmitter such as sealant and the like is still continuously transmitted to a sensing surface of the pressure sensor core body 4, so that the positioning of the pressure sensor core body is deviated from a preset position. Based on this, in this embodiment, the inventor further provides a rubber lining 18 in the inclined section 17, where the rubber lining 18 is used to reduce the diameter of the inclined section 17, so that the inner wall of the inclined section 17 is attached to the stitches of the pressure sensor core 4. Therefore, the phenomenon that the pins of the pressure sensor core body 4 in the inclined section 17 are deformed to abut against the inner wall of the inclined section 17 and then slide is effectively avoided. Meanwhile, after the rubber lining 18 is arranged, the rubber lining 18 deforms and can absorb part of downward transmitted acting force generated by thermal expansion of all components of the pressure transmitter such as sealant, so that the offset of the sensing surface of the pressure sensor core body 4 is reduced, or the offset of the sensing surface of the pressure sensor core body 4 is avoided, and the data acquisition precision in practical use is further improved.
In a preferred embodiment, in addition to the above manner, an extension 19 is further provided on the piercing section 16, and the extension 19 is disposed away from the piercing end side of the piercing section 16. With the adoption of the structure, the deformable degree of the pins of the pressure sensor core body 4 at the joint part of the penetrating section 16 and the inclined section 17 is increased, so that the pins of the pressure sensor core body 4 deformed in the inclined section 17 can better cling to the inner wall of the inclined section 17, and the acting force directly transmitted to the sensing surface of the pressure sensor core body 4, generated by the thermal expansion of all components of the pressure transmitter such as sealant, is better prevented. Thereby further improving the data acquisition precision of the invention in practical use.
As a preferred embodiment, based on the above manner, further, the length of the penetrating segment 16 is greater than the length of the penetrating segment 15. By adopting the structure, the stitch part of the pressure sensor core body 4 positioned in the penetrating section 16 is easier to deform, so that the contact length of the stitch of the pressure sensor core body 4 with the inner wall of the stitch penetrating groove 14 due to deformation is increased, the force directly transmitted to the sensing surface of the pressure sensor core body 4 is further reduced, and the data acquisition precision in practical use is further improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The high-reliability pressure transmitter is characterized by comprising a shell (1), wherein the shell (1) is connected with a socket component (2) and a connecting pipe component (3), the socket component (2) is used for transmitting an electrical signal and is connected with a superior system interface, the connecting pipe component (3) is used for being connected with a pressure system and draining a pressure medium, a pressure sensor core (4) is further arranged in the connecting pipe component (3) and used for collecting the pressure signal of the pressure medium drained by the connecting pipe component (3), a connecting passage is established between the pressure sensor core (4) and the socket component (2) by adopting a soft and hard combination plate (5) and used for transmitting the pressure signal collected by the pressure sensor core (4); the connecting pipe component (3) comprises a sensor cavity (12) and a flow channel cavity (13), the pressure sensor core (4) is arranged in the sensor cavity (12), the sensing surface of the pressure sensor core (4) corresponds to the flow channel cavity (13), a stitch through groove (14) is further formed in the connecting pipe component (3), the stitch through groove (14) is communicated with the sensor cavity (12) and the inside of the shell (1) and used for enabling a stitch of the pressure sensor core (4) to penetrate through the soft and hard combination board (5) to be connected, the stitch through groove is perpendicular to the sensing surface of the pressure sensor core (4), and the center point of the orthographic projection of the penetration hole of the stitch through groove (14) is staggered with the center point of the orthographic projection of the penetration hole.
2. The pressure transmitter of claim 1, wherein the pin through slot (14) comprises a penetrating section (15), a penetrating section (16) and a tilting section (17), the penetrating section (15) and the penetrating section (16) are vertically arranged, the tilting section (17) is arranged between the penetrating section (15) and the penetrating section (16), and a connecting line between a central axis of the tilting section (17) and a central axis of the penetrating section (15) and a connecting line between central axes of the penetrating section (16) form an obtuse angle.
3. High reliability pressure transmitter according to claim 2, characterized in that the diameter of the slanted section (17) is smaller than the diameter of the outgoing section (16) and the incoming section (15).
4. The high reliability pressure transmitter of claim 1, wherein the rigid-flex board (5) is disposed apart from a sidewall of the housing (1).
5. The highly reliable pressure transmitter according to claim 4, wherein the rigid-flex board (5) includes a first connecting portion (6), a second connecting portion (7), and a signal processing portion (8), the first connecting portion (6) is connected to the socket member (2), the second connecting portion (7) is connected to the pressure sensor core (4), the signal processing portion (8) is provided between the first connecting portion (6) and the second connecting portion (7), and the signal processing portion (8) is connected to the first connecting portion (6) and the second connecting portion (7) through a flexible board (11).
6. The highly reliable pressure transmitter of claim 5, characterized in that the connection face of the first connection portion (6) is connected perpendicularly to the pins of the socket part (2) and the connection face of the second connection portion (7) is connected perpendicularly to the pins of the pressure sensor core (4).
7. The highly reliable pressure transmitter of claim 6, wherein the area of the connection surface of the first connection portion (6) is larger than the area of the pin package surface of the socket member (2), and the area of the connection surface of the second connection portion (7) is larger than the area of the pin package surface of the pressure sensor core (4).
8. The high reliability pressure transmitter according to any one of claims 5-7, wherein the signal processing section (8) is perpendicular to the first connection section (6) and the second connection section (7).
9. The highly reliable pressure transmitter according to claim 8, wherein the flexible board (11) is curved in a circular arc shape after the signal processing section (8) is connected to the first connection section (6) and the second connection section (7).
10. The pressure transmitter of claim 9, wherein a potting adhesive (9) is further filled in the housing (1) to fix the rigid-flex board (5), the potting adhesive (9) covers the pressure sensor core (4), and the filling amount is greater than 2/3 of the capacity of the housing (1).
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| CN202210542582.0A CN114646420B (en) | 2022-05-19 | 2022-05-19 | Pressure transmitter with high reliability |
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| CN202210542582.0A CN114646420B (en) | 2022-05-19 | 2022-05-19 | Pressure transmitter with high reliability |
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| CN114646420B CN114646420B (en) | 2022-07-29 |
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| CN114646420B (en) | 2022-07-29 |
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