CN213779359U

CN213779359U - Novel pressure sensor

Info

Publication number: CN213779359U
Application number: CN202120094526.6U
Authority: CN
Inventors: 张国平; 朱辉辉
Original assignee: Zhejiang Yongxin New Energy Technology Co ltd
Current assignee: Zhejiang Yongxin New Energy Technology Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-07-23
Anticipated expiration: 2031-01-13

Abstract

The utility model belongs to the technical field of sensors, in particular to a novel pressure sensor, which comprises a shell, wherein an installation cavity is arranged in the shell; the mounting cavity is internally provided with a diaphragm which is fixedly arranged in the mounting cavity; a containing cavity is formed in the diaphragm and used for containing a medium liquid, and the medium liquid is used for transferring the pressure of the target liquid below the diaphragm; the lower end of the shell is provided with a water flow introduction hole which is communicated to the lower side of the diaphragm and transmits pressure to the medium liquid through the diaphragm; the circuit board is arranged on the shell and is provided with a detection element, the detection element extends into the containing cavity and is contacted with the medium liquid, and the pressure data transmitted by the medium liquid is measured; the lower end of the mounting cavity is provided with a partition plate, and a gap is formed between the lower surface of the diaphragm and the partition plate to form an interlayer; the partition board is provided with a through hole for liquid to pass through. The partition plate is arranged in the installation cavity below the diaphragm to form an interlayer, so that the diaphragm and the detection element are prevented from being damaged by water freezing volume expansion and extrusion.

Description

Novel pressure sensor

Technical Field

The utility model relates to a sensor technical field refers in particular to a novel pressure sensor.

Background

Existing liquid pressure sensors are used to measure liquid pressure to determine the depth, level, etc. of the liquid. The fluid pressure sensor includes a pressure transducer for converting fluid pressure into an electrical signal that can be used to measure the level of fluid in the reservoir. Conventional pressure sensors include a flat diaphragm formed of an elastomeric material such as rubber that is used to measure fluid pressure to determine the level of the fluid, and when the outer surface of the flat diaphragm is subjected to fluid pressure, the piston of the adjacent flat diaphragm is compressed, and this pressure is transmitted to the pressure sensor and converted into an electrical signal that can be used to provide a measurement reading, alarm, activate a water pump, etc. The pressure sensor may be connected to external devices such as pump switches, circuit boards, displays, alarm devices, etc.

Chinese patent application No. 201921177198.5, publication No. 12/06/2020, entitled a liquid pressure sensor and a sensor system for measuring liquid pressure, and this utility model discloses a liquid pressure sensor and a sensor system for measuring liquid pressure, include: the pressure sensor, the diaphragm and the balance weight are sleeved on the outer wall of the liquid pressure sensor; the diaphragm includes a pressure fluid therein for transmitting fluid pressure to the pressure sensor, the diaphragm being of a deformable construction and the diaphragm not being of a flat construction.

The pressure sensor described above has the advantage of accurate measurement results. The disadvantage is that the measured liquid, such as water, flows into the pressure sensor, and when the temperature is too low, the water begins to freeze, so that the volume of the water in the pressure sensor expands, and the diaphragm and the detection element are squeezed, and the detection element is damaged.

Disclosure of Invention

The utility model aims at providing a novel pressure sensor through set up the baffle in the installation cavity of diaphragm below, forms the interlayer, solves the inside water of sensor and freezes, volume expansion and the crowded bad detecting element's that causes problem.

The purpose of the utility model is realized like this:

a novel pressure sensor, comprising:

a housing having a mounting cavity therein;

the installation cavity is internally provided with:

a diaphragm fixedly disposed within the mounting cavity; a containing cavity is formed in the diaphragm and used for containing a medium liquid, and the medium liquid is used for transferring the pressure of the target liquid below the diaphragm;

the lower end of the shell is provided with a water flow introduction hole which is communicated to the lower side of the diaphragm and transmits pressure to the medium liquid through the diaphragm;

the circuit board is arranged on the shell, and a detection element is arranged on the circuit board, extends into the containing cavity and is in contact with the medium liquid, so that the pressure data transmitted by the medium liquid can be measured;

the lower end of the mounting cavity is provided with a partition plate, and a gap is formed between the lower surface of the diaphragm and the partition plate to form an interlayer; the partition board is provided with a through hole for liquid to pass through.

Preferably, the lower surface of the baffle is arc-shaped, and the middle part of the baffle protrudes upwards.

Preferably, the installation cavity is the echelonment, and the middle part shaping of installation cavity has annular platform, the diaphragm shaping has the chimb, and the chimb is placed and is used for restricting diaphragm downstream on the platform.

Preferably, a fixing ring is fixedly arranged in the mounting cavity and is attached to the upper surface of the circuit board, so that the circuit board and the diaphragm are limited to move upwards through the fixing ring.

Preferably, the outside shaping of solid fixed ring has the external screw thread, the upper end shaping of installation cavity has the internal thread, and solid fixed ring passes through threaded connection to be fixed in the installation cavity.

Preferably, the upper end of the fixed ring is formed with a force application groove, and the force application groove is used for abutting and applying force to the tool, so that the fixed ring is rotated to complete threaded connection.

Preferably, the lower surface laminating setting of circuit board is in the top of diaphragm, seals and holds the chamber.

Preferably, the diameter of the through hole is 1mm-6 mm.

Preferably, the lower end of the diaphragm is a deformable structure for transmitting the pressure of the target liquid.

Preferably, the sensors on the circuit board comprise a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are respectively used for measuring the temperature and the pressure of the medium liquid.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. when the temperature crosses lowly, water when starting to freeze, the utility model discloses the water of median septum below can freeze earlier to plug up the through-hole, and then the baffle can block the water of baffle below and continue upwards the inflation, only original water volume inflation in baffle top, volume expansion range is not big, and is less to the extrusion force of diaphragm, can't crowd bad involucra or perhaps detect the component. Finally, the function of protecting the diaphragm and the detecting element is achieved.

2. The utility model discloses in when solid fixed ring, circuit board and diaphragm three laminate together, can make circuit board and diaphragm fix completely in the installation intracavity through platform and solid fixed ring, skew about can not producing.

3. The utility model discloses well solid fixed ring's upper end still shaping has a force application groove, and the user can support the instrument on the force application groove to make things convenient for the application of force to rotate solid fixed ring, accomplish threaded connection.

4. The utility model discloses in the lower extreme of diaphragm is deformable structure, and the lower extreme of target liquid pressure extrusion diaphragm itself to upwards warp through the diaphragm lower extreme, extrude the medium liquid in the diaphragm, make the pressure production of medium liquid change, so that detecting element measures.

5. The utility model discloses well diaphragm and last casing are preferred to select for use rubber, and rubber diaphragm and rubber casing can utilize the characteristic of rubber itself to prevent effectively that the temperature from crossing when low excessively, and the diaphragm damages with last casing frost crack.

6. The utility model discloses in the media liquid can adopt incompressible and not expandable liquid, for example oil, and the preferred oil of selecting for use of media liquid in this embodiment also can prevent effectively through the characteristic of oil itself that media liquid freezes and causes the volume inflation to prevent to cause the damage of diaphragm.

Drawings

Fig. 1 is a front schematic view of the present invention.

Fig. 2 is a schematic bottom view of the present invention.

Fig. 3 is an exploded view of the present invention.

Fig. 4 is a top view of the present invention.

Fig. 5 is a sectional view taken along the line a in fig. 4.

Reference numerals: 1-a lower shell; 2-mounting a cavity; 3-a separator; 4-a holding cavity; 5-a circuit board; 6-upper shell; a 7-line intersection; 8-a separator; 9-a barrier layer; 10-a through hole; 11-a platform; 12-a flange; 13-a fixed ring; 14-force application grooves; 15-a pressure sensor; 16-a temperature sensor; 17-water flow introduction holes.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

A novel pressure sensor is mainly used for a water pump and comprises a shell, wherein the shell comprises an upper shell 6 and a lower shell 1, and an installation cavity 2 vertically penetrating through the lower shell 1 is formed in the lower shell 1. The diaphragm 3 is fixedly arranged in the installation cavity 2, and the diaphragm 3 seals the installation cavity 2, so that liquid below the diaphragm 3 cannot flow to the upper side of the diaphragm 3. The shaping has the chamber 4 of holding in the diaphragm 3, holds the medium liquid that has held in the chamber 4, and the medium liquid is used for transmitting the pressure data of the target liquid of diaphragm 3 below, and this novel pressure sensor is used for the water pump in this embodiment, and the target liquid is water promptly. The lower end of the lower case 1 has a water flow introduction hole 17 to be communicated to the lower side of the diaphragm 3, thereby introducing water to the lower surface of the diaphragm 3 to achieve pressing of the lower surface of the diaphragm 3.

With reference to fig. 3 and 5, a circuit board 5 is disposed above the diaphragm 3, so that the accommodating chamber 4 is sealed by the circuit board 5, and the medium liquid can only change in the accommodating chamber 4. The circuit board 5 is provided with a detection element which extends into the accommodating cavity 4 and is in contact with the medium liquid, so that data transmitted by the medium liquid can be measured. As shown in fig. 4, the upper end of the lower casing 1 is sleeved with an upper casing 6, the upper end of the upper casing 6 is provided with a wire intersection 7, and the wire and the related circuit of the circuit board 5 communicate the circuit board 5 with the outside through the wire intersection 7, so that the circuit board 5 is powered on and data are transmitted to the outside.

With reference to fig. 2 and 5, the lower end of the installation cavity 2 is provided with a partition plate 8, the lower surface of the partition plate 8 is in an arc shape, and the middle part of the partition plate 8 protrudes upwards, so that the water flow is guided and the speed of the water flow is buffered through the design, meanwhile, the water is frozen, and after the volume is expanded, the design can also improve certain compressive strength, and the partition plate 8 is prevented from being crushed by the ice. A gap is formed between the lower surface of the diaphragm 3 and the partition plate 8 to form an interlayer 9, and the partition plate 8 is provided with a through hole 10 for liquid to pass through. The diameter of the through hole 10 is in the range of 1mm to 6mm, preferably 4mm in this embodiment.

When water is normal liquid, water flows into the interlayer 9 through the through holes 10 to extrude the diaphragm 3 and further extrude medium liquid in the diaphragm 3, finally the detection element detects corresponding pressure change, the pressure is converted into the pressure of the water in the water pump through corresponding calculation, and the data are transmitted to the display device to display corresponding data so that a user can observe the data. When the temperature is too low and water begins to freeze, the water below the partition plate 8 can be frozen firstly to block the through hole 10, then the partition plate 8 can block the water below the partition plate from continuing to expand upwards, only the original water volume above the partition plate 8 expands, the volume expansion amplitude is not large, the extrusion force on the diaphragm 3 is small, and the diaphragm or the detection element cannot be damaged by extrusion. Finally, the function of protecting the diaphragm 3 and the detecting element is achieved through the design.

As shown in fig. 3 and 5, the installation cavity 2 is stepped, an annular platform 11 is formed in the middle of the installation cavity 2, the diaphragm 3 is formed with a flange 12, and the flange 12 is placed on the platform 11, so that the downward movement of the diaphragm 3 is limited by the flange 12 and the platform 11. Still fixedly in the installation cavity 2 be provided with solid fixed ring 13 to solid fixed ring 13 is laminated with the upper surface of circuit board 5 mutually, thereby has restricted circuit board 5 upwards to squint through solid fixed ring 13. The wiring board 5 is disposed above the diaphragm 3, so that the upward deflection of the diaphragm 3 is also restricted accordingly. When the fixing ring 13, the circuit board 5 and the diaphragm 3 are attached together, the circuit board 5 and the diaphragm 3 can be completely fixed in the mounting cavity 2 through the platform 11 and the fixing ring 13, and vertical offset cannot be generated.

The fixing of the fixing ring 13 in the mounting cavity 2 can be performed by gluing, welding, screwing, or screwing, and the like, and the embodiment preferably uses screwing. As shown in fig. 3 and 5, an external thread is formed on the outer side of the fixing ring 13, an internal thread is formed on the upper end of the mounting cavity 2, and the fixing ring 13 is fixed on the upper end of the mounting cavity 2 by a threaded connection.

Further, during the installation of this novel pressure sensor, the installer can accomplish the threaded connection who fixes ring 13 and installation cavity 2 more easily, as shown in fig. 3, the upper end of fixing ring 13 still the shaping has application of force groove 14, and the user can support the instrument on application of force groove 14 to make things convenient for the application of force to rotate fixed ring 13, accomplish threaded connection.

Meanwhile, as shown in fig. 2, the lower end of the outer surface of the lower shell 1 is also provided with an external thread, so that the lower shell 1 can be fixed on the water pump by matching the external thread with the internal thread on the water pump, and the novel pressure sensor is fixed on the water pump by threaded connection.

The lower end of the diaphragm 3 is of a deformable structure, and the pressure of the target liquid presses the lower end of the diaphragm 3, so that the lower end of the diaphragm 3 deforms upwards to press the medium liquid in the diaphragm 3, and the pressure of the medium liquid changes, so that the detection element can measure the pressure.

Because the diaphragm 3 lower extreme is deformable structure, so the diaphragm 3 can adopt some flexible, can be under the pressure effect material of warping, like rubber, and the preferred rubber that chooses for diaphragm 3 in this embodiment, the characteristic of rubber self can be utilized to rubber diaphragm 3 effectively to prevent when the temperature is too low, and diaphragm 3 frost crack damages. The medium liquid can be a non-corrosive liquid with a high freezing point, and a non-compressible and non-expandable liquid, such as oil, and in this embodiment, the medium liquid is preferably oil, and the medium liquid can be effectively prevented from freezing to cause volume expansion due to the characteristics of the oil, so that damage to the diaphragm 3 is prevented.

Meanwhile, the upper shell 6 can also be a rubber shell, so that the upper shell 6 is effectively prevented from being damaged by frost cracking.

The detection elements on the circuit board 5 comprise a temperature detector 16 and a pressure detector 15, so that the temperature and pressure changes of the medium liquid are respectively measured through the temperature detector 16 and the pressure detector 15, the pressure data is converted into the pressure of water in the water pump through corresponding calculation, and the data is transmitted to a display device to display corresponding data so as to be convenient for a user to observe.

The specific working process of the scheme is as follows:

after the water pump was installed to the user with this novel pressure sensor, the flowing water in the water pump passed through-hole 10 and got into interlayer 9, then extruded diaphragm 3's lower extreme, made diaphragm 3 upwards warp to make the oil in the diaphragm 3 receive the extrusion, and then produced the change of corresponding pressure, then corresponding calculation is carried out to the rethread control panel, converts the pressure of water in the water pump into, demonstrates corresponding data with data transfer to display device, so that the user observes.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A novel pressure sensor, comprising:

a housing having a mounting cavity (2) therein;

the installation cavity (2) is internally provided with:

a diaphragm (3) fixedly arranged in the mounting cavity (2); a containing cavity (4) is formed in the diaphragm (3) and is used for containing a medium liquid, and the medium liquid is used for transferring the pressure of the target liquid below the diaphragm (3);

the lower end of the shell is provided with a water flow introduction hole (17), is communicated to the lower side of the diaphragm (3), and transmits pressure to the medium liquid through the diaphragm (3);

the circuit board (5) is arranged on the shell, and the detection element is arranged on the circuit board (5) and extends into the accommodating cavity (4) to be contacted with the medium liquid so as to measure the pressure data transmitted by the medium liquid;

a partition plate (8) is arranged at the lower end of the mounting cavity (2), and a gap is formed between the lower surface of the diaphragm (3) and the partition plate (8) to form an interlayer (9); the partition plate (8) is provided with a through hole (10) for liquid to pass through.

2. The novel pressure sensor of claim 1, wherein: the lower surface of the clapboard (8) is arc-shaped, and the middle part of the clapboard is protruded upwards.

3. The novel pressure sensor of claim 1, wherein: installation cavity (2) are the echelonment, and the middle part shaping of installation cavity (2) has annular platform (11), diaphragm (3) shaping has chimb (12), and chimb (12) are placed and are used for restricting diaphragm (3) downstream on platform (11).

4. A novel pressure sensor as claimed in claim 3, wherein: still fixed solid fixed ring (13) that is provided with in installation cavity (2) to gu fixed ring (13) is laminated mutually with the upper surface of circuit board (5), thereby restricts circuit board (5) through solid fixed ring (13) and moves upwards.

5. The novel pressure sensor of claim 4, wherein: the outside shaping of solid fixed ring (13) has the external screw thread, the upper end shaping of installation cavity (2) has the internal thread, and solid fixed ring (13) is fixed in installation cavity (2) through threaded connection.

6. The novel pressure sensor of claim 5, wherein: the upper end shaping of solid fixed ring (13) has application of force groove (14), and application of force groove (14) are used for leaning on and the application of force of instrument to rotate solid fixed ring (13), accomplish threaded connection.

7. The novel pressure sensor of claim 4, wherein: the lower surface laminating of circuit board (5) sets up in the top of diaphragm (3), seals and holds chamber (4).

8. A novel pressure sensor as claimed in any one of claims 1 to 7, wherein: the diameter of the through hole (10) is 1mm-6 mm.

9. A novel pressure sensor as claimed in any one of claims 1 to 7, wherein: the lower end of the diaphragm (3) is a deformable structure which is used for transmitting the pressure of the target liquid.

10. A novel pressure sensor as claimed in any one of claims 1 to 7, wherein: the detection element on the circuit board (5) comprises a temperature detector (16) and a pressure detector (15), and the temperature detector and the pressure detector are respectively used for measuring the temperature and the pressure change of the medium liquid.