CN110553785B - High-precision temperature compensation type pressure sensor - Google Patents
High-precision temperature compensation type pressure sensor Download PDFInfo
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- CN110553785B CN110553785B CN201910885173.9A CN201910885173A CN110553785B CN 110553785 B CN110553785 B CN 110553785B CN 201910885173 A CN201910885173 A CN 201910885173A CN 110553785 B CN110553785 B CN 110553785B
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- fixedly connected
- pressure sensor
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- pressure
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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
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/10—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the capsule type
- G01L7/102—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the capsule type construction or mounting of capsules
Abstract
The invention relates to the technical field of pressure sensors and discloses a high-precision temperature compensation type pressure sensor which comprises a base, wherein a gauge head is fixedly connected to the upper end of the base, a detection cavity is formed in the lower end of the base, a pressure element tube is fixedly arranged inside the gauge head, a liquid storage cavity is formed between the detection cavity and the pressure element tube in a penetrating mode, a fixing frame is fixedly clamped and connected inside the lower end of the detection cavity, a pressure measuring film and a protective film located on the outer side of the pressure measuring film are fixedly and hermetically connected inside the fixing frame, a fixing ring plate is fixedly connected to the outer side wall of the fixing frame, and a notch used for limiting the fixing ring plate is formed in. This high accuracy temperature compensation type pressure sensor possesses the problem that can effectually avoid among the pressure sensor temperature to change and produce pressure influence measurement accuracy, and the protective film can provide effective protection when the temperature risees and causes deformation, avoids the advantage of this partial pressure direct action influence measurement accuracy's problem on the pressure measuring film.
Description
Technical Field
The invention relates to the technical field of pressure sensors, in particular to a high-precision temperature compensation type pressure sensor.
Background
The diaphragm type pressure gauge is suitable for measuring the pressure of liquid, gas or granular solid medium with high corrosivity, high viscosity, easy crystallization, easy solidification and high temperature of a measuring tool and occasions in which the measuring medium is required to be prevented from directly entering the pressure gauge, sediment accumulation is prevented, and the measuring tool is easy to clean. The diaphragm type pressure gauge is mainly used in the industrial departments of petroleum, chemical industry, chemical fiber, dyeing, pharmacy, alkali-making food and the like.
The pressure sensor system at present is filled with pressure measuring liquid as a medium for transmitting pressure, and the pressure measuring liquid is limited by expansion coefficient characteristics, so that the display value of the pressure gauge is increased along with the temperature increase of a pressure part, and particularly for the pressure gauge with low measuring range, the influence is more obvious, so that the measurement accuracy of the pressure sensor is always low under the influence of the temperature, the measurement accuracy in practical use is greatly influenced, and the pressure sensor system is not convenient for people to operate and use.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-precision temperature compensation type pressure sensor which has the advantages that the problem that the pressure intensity is generated due to the change of the temperature in the pressure sensor to influence the measurement precision can be effectively avoided, the protective film can provide effective protection when the temperature rises to cause deformation, the problem that the pressure of the part directly acts on the pressure measuring film to influence the measurement precision is avoided, the pressure sensor system is solved by filling pressure measuring liquid as a medium for transferring the pressure, the pressure measuring liquid is limited by the expansion coefficient characteristic, so that the display value of the pressure gauge is increased along with the temperature increase of the pressure part, particularly for the pressure gauge with low measuring range, the influence is more obvious, so the measurement accuracy of the pressure sensor is always low under the influence of the temperature, the measurement accuracy in actual use is greatly influenced, and the operation and the use of people are inconvenient.
(II) technical scheme
In order to effectively avoid the problem that the pressure intensity is generated due to the change of the temperature in the pressure sensor to influence the measurement accuracy, the protective film can provide effective protection when the temperature rises to cause deformation, and the purpose of avoiding the problem that the pressure of the part directly acts on the pressure measuring film to influence the measurement accuracy is achieved, the invention provides the following technical scheme: a high-precision temperature compensation type pressure sensor comprises a base, wherein a gauge head is fixedly connected to the upper end of the base, a detection cavity is formed in the lower end of the base, a pressure element pipe is fixedly arranged in the gauge head, a liquid storage cavity is formed between the detection cavity and the pressure element pipe in a penetrating mode, a fixing frame is fixedly clamped in the lower end of the detection cavity in a fixing mode, a pressure measuring film and a protective film located on the outer side of the pressure measuring film are fixedly and hermetically connected in the fixing frame, a fixing ring plate is fixedly connected to the outer side wall of the fixing frame, a notch used for limiting the fixing ring plate is formed in the lower end of the base, the fixing ring plate and the notch are fixedly connected through a plurality of positioning mechanisms, a plurality of connecting blocks of U-shaped structures are uniformly hinged to the outer side of the upper end of the base, and a plurality of clamping blocks symmetrically arranged, the connecting block and the clamping block are clamped through a limiting mechanism;
stop gear leads to the groove including seting up the T shape of keeping away from base one side at the connecting block, the briquetting has been cup jointed in the activity of the vertical portion that the groove was led to T shape, the upper end of briquetting has been seted up the ball groove and the ball inslot rotates through ball bearing and is connected with the bull stick, the lower extreme symmetry of briquetting rotates and is connected with two push-and-pull rods, the push-and-pull rod is kept away from the one end of briquetting and is rotated and be connected with the activity and cup joint the gag lever post in the logical groove horizontal part of T shape, the spacing hole of pegging graft is seted up with the gag lever post correspondence to the lateral wall of fixture block, the same reset spring of fixedly connected with between the lower extreme of briquetting and the logical inner wall of T shape, the.
Preferably, positioning mechanism is including seting up the recess at the fixed ring board outer wall, be equipped with thrust spring in the recess, thrust spring's one end and the tank bottom fixed connection of recess, thrust spring's other end fixedly connected with locating lever, the constant head tank that corresponds the grafting with the locating lever is seted up to the inner wall that lacks the groove, the locating lever is located the one end fixedly connected with pull rod of recess, the one end fixedly connected with arm-tie of locating lever is kept away from to the pull rod, the fixed slot that matches the correspondence with the arm-tie is seted up to the inner wall of fixed frame.
Preferably, an upper side lever wall of the positioning lever is formed as an inclined surface.
Preferably, the surface of the pulling plate is provided with a pulling groove.
Preferably, the upper end of the fixed ring plate is uniformly and fixedly connected with a plurality of sealing ring plates which are sequentially arranged from outside to inside, the inner wall of the top of the notch groove is provided with a sealing ring groove which is in sealed insertion connection with the sealing ring plates, and the inner wall of the sealing ring groove is fixedly connected with a layer of sealing rubber gasket.
Preferably, the surface of the base is uniformly provided with a plurality of limiting screw holes, and the limiting screw holes are internally threaded with limiting bolts.
Preferably, one end of the horizontal part at the lower end of the connecting block is provided with an inclined surface.
Preferably, the side wall of the connecting block is fixedly connected with a limiting frame, and a strip-shaped opening used for the rotating plate to extend into is formed in the surface of the limiting frame.
(III) advantageous effects
Compared with the prior art, the invention provides a high-precision temperature compensation type pressure sensor which has the following beneficial effects:
1. this high accuracy temperature compensation type pressure sensor, through pressure measuring membrane and the protective film that is equipped with, the protective film can effectually avoid among the pressure sensor temperature to change and produce the problem that pressure influences measurement accuracy, and the protective film can provide effective protection when the temperature risees and causes deformation, avoids the problem that this partial pressure direct action influences measurement accuracy on the pressure measuring membrane.
2. The high-precision temperature compensation type pressure sensor is characterized in that the fixing frame is clamped into the detection cavity through the fixing frame, the fixing ring plate, the notch and the positioning mechanism, when the pressure measuring film and the protective film are installed, the fixing ring plate is clamped into the notch, the upper side inclined plane of the positioning rod is extruded by stress and automatically retracts into the groove, when the positioning rod moves to the positioning groove, the thrust spring pushes the positioning rod to move outwards so that the positioning rod is clamped with the positioning groove to realize the stable limit of the fixing frame, and when the fixing frame is required to be taken down to maintain and replace the pressure measuring film and the protective film, the pull plate is pulled, the limit locking of the fixing frame can be released by pulling the positioning rod out of the positioning groove, the quick disassembly and assembly of the pressure measuring film can be realized, the maintenance and replacement of the pressure measuring film are convenient, and the sealing performance of the connection between the fixing frame and the detection cavity can be ensured through the matching of the sealing, is convenient for use.
3. This high accuracy temperature compensation type pressure sensor, through the connecting block that is equipped with, fixture block and stop gear, when connecting pressure sensor on other pipelines, utilize spacing bolt to realize that pressure sensor and pipe connection's preliminary firm is fixed, the connecting block that overturns again makes the horizontal part of connecting block lower extreme block flange department on the connecting tube, the gag lever post removes to spacing hole department after the joint is good, reset spring pullback briquetting, and then make the briquetting promote the push-pull rod to release T shape to lead to the groove with the gag lever post and make the gag lever post and spacing hole block can realize the firm connection between connecting block and the fixture block, can carry out the spacing of stabilizing to the connecting block and fix, the structural stability is improved, and convenient use.
Drawings
Fig. 1 is a schematic structural diagram of a high-precision temperature compensation type pressure sensor according to the present invention;
FIG. 2 is an enlarged view of a portion A of the high-precision temperature compensation type pressure sensor shown in FIG. 1;
FIG. 3 is an enlarged view of a portion B of the high-precision temperature compensation type pressure sensor shown in FIG. 1 according to the present invention;
fig. 4 is a schematic cross-sectional structural view of the connection block and the fixture block of the high-precision temperature compensation type pressure sensor according to the present invention in the C-C direction.
In the figure: the device comprises a base 1, a gauge head 2, a detection cavity 3, a pressure element tube 4, a liquid storage cavity 5, a fixing frame 6, a pressure measuring film 7, a protective film 8, a fixing ring plate 9, a groove 10, a positioning mechanism 11, a groove 111, a thrust spring 112, a positioning rod 113, a positioning groove 114, a pull rod 115, a pull plate 116, a fixing groove 117, a connecting block 12, a clamping block 13, a limiting mechanism 14, a T-shaped through groove 141, a pressing block 142, a rotating rod 143, a push-pull rod 144, a limiting rod 145, a limiting hole 146, a return spring 147, a rotating plate 148, a 149T-shaped operating rod, a sealing ring plate 15, a sealing ring groove 16, a limiting screw hole 17, a limiting bolt 18, a limiting frame 19 and a strip-.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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. 1-4, a high-precision temperature compensation type pressure sensor comprises a base 1, a gauge head 2 is fixedly connected to the upper end of the base 1, a detection chamber 3 is formed at the lower end of the base 1, a pressure element tube 4 is fixedly arranged inside the gauge head 2, a liquid storage chamber 5 is formed between the detection chamber 3 and the pressure element tube 4 in a penetrating manner, a fixing frame 6 is fixedly clamped inside the lower end of the detection chamber 3, a pressure measurement film 7 and a protective film 8 positioned outside the pressure measurement film 7 are fixedly and hermetically connected inside the fixing frame 6, a fixing ring plate 9 is fixedly connected to the outer side wall of the fixing frame 6, a notch 10 for limiting the fixing ring plate 9 is formed at the lower end of the base 1, the fixing ring plate 9 and the notch 10 are fixedly connected through a plurality of positioning mechanisms 11, a plurality of connecting blocks 12 with U-shaped structures are uniformly hinged to the outer side of the upper end of the base 1, a plurality of clamping blocks 13 symmetrically arranged about the, the connecting block 12 and the fixture block 13 are clamped through a limiting mechanism 14;
the limiting mechanism 14 comprises a T-shaped through groove 141 arranged on one side, far away from the base 1, of the connecting block 12, a pressing block 142 is movably sleeved in a vertical portion of the T-shaped through groove 141, a ball groove is formed in the upper end of the pressing block 142, a rotating rod 143 is rotatably connected in the ball groove through a ball bearing, the lower end of the pressing block 142 is symmetrically and rotatably connected with two push-pull rods 144, one end, far away from the pressing block 142, of each push-pull rod 144 is rotatably connected with a limiting rod 145 movably sleeved in the horizontal portion of the T-shaped through groove 141, a limiting hole 146 correspondingly inserted with the limiting rod 145 is formed in the side wall of the clamping block 13, the same reset spring 147 is fixedly connected between the lower end of the pressing block 142 and the inner wall of the T-shaped through groove 141, a rotating plate 148 is fixedly.
The upper side lever wall of the positioning lever 113 is formed as an inclined surface.
The surface of the pulling plate 116 is provided with a pulling groove.
The upper end of the fixed ring plate 9 is uniformly and fixedly connected with a plurality of sealing ring plates 15 which are sequentially arranged from outside to inside, the inner wall of the top of the notch groove 10 is provided with a sealing ring groove 16 which is in sealing insertion connection with the sealing ring plates 15, and the inner wall of the sealing ring groove 16 is fixedly connected with a layer of sealing rubber gasket.
A plurality of limiting screw holes 17 are uniformly formed in the surface of the base 1, and limiting bolts 18 are connected to the limiting screw holes 17 in an internal thread mode.
One end of the horizontal part at the lower end of the connecting block 12 is provided with an inclined plane.
The side wall of the connecting block 12 is fixedly connected with a limiting frame 19, and the surface of the limiting frame 19 is provided with a strip-shaped opening 20 for the rotating plate 148 to extend into.
In summary, in the high-precision temperature compensation type pressure sensor, the protective film 8 can effectively avoid the problem that the pressure intensity affects the measurement accuracy due to the temperature change in the pressure sensor through the arranged pressure measurement film 7 and protective film 8, the protective film 8 can provide effective protection when the temperature rises to cause deformation, and the problem that the pressure of the part directly acts on the pressure measurement film 7 to affect the measurement accuracy is avoided, through the arranged fixing frame 6, the fixing ring plate 9, the notch 10 and the positioning mechanism 11, when the pressure measurement film 7 and the protective film 8 are installed, the fixing frame 6 is clamped into the detection cavity 3, the fixing ring plate 9 is clamped into the notch 10, the upper inclined plane of the positioning rod 113 is extruded by the stress to automatically retract into the groove 111, when the positioning rod 113 moves to the positioning groove 114, the thrust spring 112 pushes the positioning outside to move outwards so that the positioning rod 113 is clamped with the positioning groove 114 to realize the stable limit of the fixing frame 6, when the fixed frame 6 needs to be taken down to maintain and replace the pressure measuring membrane 7 and the protective membrane 8, the pulling plate 116 is pulled, the locating rod 113 is pulled out of the locating groove 114 by the pulling rod 115, the limit locking of the fixed frame 6 can be released, the fixed frame 6 can be quickly assembled and disassembled, the pressure measuring membrane 7 is convenient to maintain and replace, the sealing performance of the connection between the fixed frame 6 and a detection cavity can be ensured by the matching of the sealing ring plate 15 and the sealing ring groove 16, the use is convenient, when the pressure sensor is connected on other pipelines, the primary stable fixation of the connection between the pressure sensor and the pipeline is realized by the limiting bolt 18, the horizontal part at the lower end of the connecting block 12 is clamped on a flange on the connecting pipeline by turning over the connecting block 12, the limiting rod 145 moves to the limiting hole 146 after the clamping is finished, the reset spring 147 pulls back the pressing block 142, and then make briquetting 142 promote push-and-pull rod 144 and push out the gag lever post 145 outside T-shaped through groove 141 and make gag lever post 145 and spacing hole 146 block can realize the firm connection between connecting block 12 and the fixture block 13, can carry out the spacing fixed of stabilizing to connecting block 12, improved structural stability, convenient to use.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A high accuracy temperature compensation type pressure sensor, includes base (1), its characterized in that: the upper end of the base (1) is fixedly connected with a gauge head (2), the lower end of the base (1) is provided with a detection cavity (3), a pressure element pipe (4) is fixedly arranged in the gauge head (2), a liquid storage cavity (5) is formed between the detection cavity (3) and the pressure element pipe (4) in a penetrating manner, a fixed frame (6) is fixedly clamped in the lower end of the detection cavity (3), a pressure measuring film (7) and a protective film (8) positioned outside the pressure measuring film (7) are fixedly and hermetically connected in the fixed frame (6), a fixed ring plate (9) is fixedly connected to the outer side wall of the fixed frame (6), a slot (10) used for limiting the fixed ring plate (9) is formed in the lower end of the base (1), the fixed ring plate (9) and the slot (10) are fixedly connected through a plurality of positioning mechanisms (11), and a plurality of connecting blocks (12) with U-shaped structures are uniformly hinged to the outer side of the upper end of the base (1), the vertical outer side wall of the base (1) is fixedly connected with clamping blocks (13) which are symmetrically arranged relative to the connecting block (12), and the connecting block (12) and the clamping blocks (13) are clamped through a limiting mechanism (14);
the limiting mechanism (14) comprises a T-shaped through groove (141) formed in one side, far away from the base (1), of the connecting block (12), a pressing block (142) is movably sleeved in a vertical portion of the T-shaped through groove (141), a ball groove is formed in the upper end of the pressing block (142), a rotating rod (143) is rotatably connected in the ball groove through a ball bearing, two push-pull rods (144) are symmetrically and rotatably connected to the lower end of the pressing block (142), one end, far away from the pressing block (142), of each push-pull rod (144) is rotatably connected with a limiting rod (145) movably sleeved in a horizontal portion of the T-shaped through groove (141), limiting holes (146) correspondingly connected with the limiting rods (145) in an inserting mode are formed in the side wall of the clamping block (13), a same reset spring (147) is fixedly connected between the lower end of the pressing block (142) and the inner wall of the T-shaped through groove (141), and a, the upper end of the rotating plate (148) is fixedly connected with a T-shaped operating rod (149).
2. A high accuracy temperature compensated pressure sensor as defined in claim 1 wherein: positioning mechanism (11) are including seting up recess (111) at fixed crown plate (9) outer wall, be equipped with thrust spring (112) in recess (111), the one end of thrust spring (112) and the tank bottom fixed connection of recess (111), the other end fixedly connected with locating lever (113) of thrust spring (112), scarce the inner wall of groove (10) and seted up constant head tank (114) of pegging graft with locating lever (113) correspondence, locating lever (113) are located one end fixedly connected with pull rod (115) of recess (111), the one end fixedly connected with arm-tie (116) of locating lever (113) are kept away from in pull rod (115), fixed slot (117) that correspond with arm-tie (116) matching are seted up to the inner wall of fixed frame (6).
3. A high accuracy temperature compensated pressure sensor as defined in claim 2 wherein: the upper side rod wall of the positioning rod (113) is an inclined surface.
4. A high accuracy temperature compensated pressure sensor as defined in claim 3 wherein: the surface of the pulling plate (116) is provided with a pulling groove.
5. A high accuracy temperature compensated pressure sensor as defined in claim 1 wherein: the sealing ring plate is characterized in that a plurality of sealing ring plates (15) are sequentially arranged from outside to inside and are uniformly and fixedly connected to the upper end of the fixed ring plate (9), a sealing ring groove (16) which is hermetically inserted with the sealing ring plates (15) is formed in the inner wall of the top of the notch groove (10), and a layer of sealing rubber gasket is fixedly connected to the inner wall of the sealing ring groove (16).
6. A high accuracy temperature compensated pressure sensor as defined in claim 1 wherein: a plurality of limiting screw holes (17) are uniformly formed in the surface of the base (1), and limiting bolts (18) are connected to the limiting screw holes (17) in an internal thread mode.
7. A high accuracy temperature compensated pressure sensor as defined in claim 1 wherein: one end of the horizontal part at the lower end of the connecting block (12) is provided with an inclined plane.
8. A high accuracy temperature compensated pressure sensor as defined in claim 1 wherein: the side wall fixedly connected with spacing frame (19) of connecting block (12), bar opening (20) that are used for changeing board (148) and stretch into are seted up on the surface of spacing frame (19).
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| CN201910885173.9A CN110553785B (en) | 2019-09-19 | 2019-09-19 | High-precision temperature compensation type pressure sensor |
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| CN201910885173.9A CN110553785B (en) | 2019-09-19 | 2019-09-19 | High-precision temperature compensation type pressure sensor |
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| CN110553785B true CN110553785B (en) | 2020-12-01 |
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| CN112414608A (en) * | 2020-11-02 | 2021-02-26 | 安徽瑞尔特仪表科技有限公司 | Diaphragm type pressure gauge |
| CN113503808B (en) * | 2021-07-23 | 2023-04-07 | 深圳瑞湖科技有限公司 | Forced induction structure suitable for curved surface deformation detects |
| CN114659698B (en) * | 2022-03-06 | 2024-04-09 | 淮安市格洋浩瑞电子科技有限公司 | Impact-resistant high-stability flat membrane type pressure sensor |
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