CN212645961U

CN212645961U - Hydraulic pressure sensor

Info

Publication number: CN212645961U
Application number: CN202021404535.2U
Authority: CN
Inventors: 王会容; 王慧芳
Original assignee: Taizhou Jia Bo Instrument Technology Co ltd
Current assignee: Taizhou Jia Bo Instrument Technology Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-03-02
Anticipated expiration: 2030-07-16

Abstract

The utility model discloses a hydraulic pressure sensor, which comprises a body, the side surface fixedly connected with nut of body, the lower surface swing joint of body has lower apron, the last fixed surface of body is connected with the screw thread post, the through-hole has been seted up to the inside of screw thread post, the filter chamber has been seted up to the inside of body and the below that is located the screw thread post, the interior bottom fixedly connected with filter screen of filter chamber, the lower surface of filter chamber is provided with the hydraulic pressure and detects the mouth, the below that the hydraulic pressure detected the mouth is provided with receiving channel, receiving channel keeps away from the one end fixedly connected with standing groove that the hydraulic pressure detected the mouth. The utility model discloses, through set up the spring between standing groove and body, it is influenced to reduce the diaphragm and receive vibrations, sets up the rubber circle through the side surface at silicon pressure drag sensing element, reduces silicon pressure drag sensing element and receives external vibrations to influence, improves the degree of accuracy of sensor measurement.

Description

Hydraulic pressure sensor

Technical Field

The utility model relates to a pressure sensor technical field especially relates to a hydraulic pressure sensor.

Background

The hydraulic pressure sensor is the most commonly used pressure sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to various industries such as petroleum pipelines, water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, war industry, petrifaction, oil wells, electric power, ships, machine tools, pipeline air supply, boiler negative pressure and the like.

When some hydraulic pressure sensors are used at present, errors are generated due to the fact that the measured values of the sensors are influenced by external vibration, people can touch cables when walking or foreign objects move, and therefore electronic elements inside the sensors are subjected to position deviation and can be damaged seriously, and the service lives of the sensors are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcomings existing in the prior art, and providing a hydraulic pressure sensor.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a hydraulic pressure sensor comprises a body, wherein a nut is fixedly connected to the side surface of the body, a lower cover plate is movably connected to the lower surface of the body, a threaded column is fixedly connected to the upper surface of the body, a through hole is formed in the threaded column, a filter cavity is formed in the body and located below the threaded column, a filter screen is fixedly connected to the inner bottom of the filter cavity, a hydraulic detection port is formed in the lower surface of the filter cavity, a receiving channel is arranged below the hydraulic detection port, a placing groove is fixedly connected to one end, away from the hydraulic detection port, of the receiving channel, a diaphragm is arranged in the placing groove, a spring is fixedly connected to the side surface of the placing groove, one end, away from the placing groove, of the spring is fixedly connected with the body, a silicon piezoresistive sensitive element is fixedly connected to the lower surface of the placing groove, and a rubber ring is fixedly connected to the side, the lower fixed surface of silicon pressure drag sensing element is connected with signal amplifier, the internal surface of apron is connected with the circuit board down, the inside swing joint of apron has the cable conductor down, the lower fixed surface of apron is connected with the base down, the solid fixed ring of lower fixed surface of base, gu fixed ring's side surface is provided with the external screw thread, gu fixed ring keeps away from one side fixedly connected with elastic plate of base, the side surface fixedly connected with briquetting of elastic plate, the side surface of elastic plate and the one side swing joint opposite with the briquetting have the screw cap, the internal surface of screw cap is provided with the internal thread.

As a further description of the above technical solution:

the fixing ring is in threaded connection with the screw cap through external threads and internal threads, the inner diameter of one end, located on the fixing ring, of the screw cap is 2 times that of the other end of the fixing ring, and the pressing block is a rubber block.

As a further description of the above technical solution:

the junction of screw thread post and body is provided with sealed the pad, the filter screen is for filtering the metal mesh.

As a further description of the above technical solution:

the signal amplifier is electrically connected with the circuit board through a lead, and the circuit board is electrically connected with the cable.

As a further description of the above technical solution:

the threaded column, the through hole, the filter cavity, the hydraulic detection port and the receiving channel are arranged on the same vertical shaft.

As a further description of the above technical solution:

the diaphragm is 0.3cm-0.5cm thick and is abutted against the silicon piezoresistive sensitive element, and the silicon piezoresistive sensitive element is electrically connected with the signal amplifier.

The utility model discloses following beneficial effect has:

1. compared with the prior art, this hydraulic pressure sensor through set up the spring between standing groove and body, reduces the diaphragm and receives vibrations to influence, sets up the rubber circle through the side surface at silicon pressure drag sensing element, reduces silicon pressure drag sensing element and receives external vibrations to influence, improves the degree of accuracy that the sensor measured.

2. Compared with the prior art, this hydraulic pressure sensor, solid fixed ring passes through external screw thread, internal thread and screw cap threaded connection, forces the elastic plate to take the briquetting to push down together through twisting the screw cap to reach and fix the cable clamp fastening, prevent to remove the cable conductor and make the inside electronic component of sensor take place to damage, structural design is reasonable, has improved the life of sensor.

Drawings

Fig. 1 is a cross-sectional view of a hydraulic pressure sensor according to the present invention;

fig. 2 is a schematic structural view of a hydraulic pressure sensor shown in fig. 1 according to the present invention;

fig. 3 is a schematic structural diagram of a hydraulic pressure sensor B in fig. 1 according to the present invention;

fig. 4 is a top view of a hydraulic pressure sensor diagram according to the present invention.

Illustration of the drawings:

1. a body; 2. a nut; 3. a threaded post; 4. a through hole; 5. a filter chamber; 6. a filter screen; 7. a hydraulic pressure detection port; 8. a receiving channel; 9. a placement groove; 10. a membrane; 11. a spring; 12. a silicon piezoresistive sense element; 13. a rubber ring; 14. a lower cover plate; 15. a signal amplifier; 16. a wire; 17. a circuit board; 18. a cable wire; 19. a base; 20. a fixing ring; 21. an external thread; 22. an elastic plate; 23. briquetting; 24. screwing a cover; 25. an internal thread.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the present invention provides a hydraulic pressure sensor: the sensor comprises a body 1, a nut 2 is fixedly connected to the side surface of the body 1, the sensor is convenient to fix and disassemble, a lower cover plate 14 is movably connected to the lower surface of the body 1, a threaded column 3 is fixedly connected to the upper surface of the body 1 and is connected with a pipeline through the threaded column 3, a through hole 4 is formed in the threaded column 3, liquid can conveniently enter the body 1 from the through hole 4, a filter cavity 5 is formed in the body 1 and is positioned below the threaded column 3, a filter screen 6 is fixedly connected to the inner bottom of the filter cavity 5 and is used for filtering impurities in the liquid and preventing the impurities from entering to influence the measurement of the sensor, a hydraulic detection port 7 is formed in the lower surface of the filter cavity 5, a receiving channel 8 is arranged below the hydraulic detection port 7, a placing groove 9 is fixedly connected to one end, far away from the hydraulic detection port 7, of the receiving channel 8 is used for, the liquid directly acts on the diaphragm 10 to make the diaphragm 10 generate micro-displacement proportional to the pressure of the medium, so that the silicon piezoresistive sensitive element 12 of the sensor changes, the side surface of the placing groove 9 is fixedly connected with a spring 11 for reducing the influence of vibration on the diaphragm 10, one end of the spring 11 far away from the placing groove 9 is fixedly connected with the body 1, the lower surface of the placing groove 9 is fixedly connected with the silicon piezoresistive sensitive element 12 for converting fluctuation signals into electric signals, the silicon piezoresistive sensitive element 12 generates fluctuation signals under the influence of the micro-displacement generated by the diaphragm 10, the side surface of the silicon piezoresistive sensitive element 12 is fixedly connected with a rubber ring 13 for reducing the influence of vibration on the silicon piezoresistive sensitive element 12 and improving the accurate value of measurement, the lower surface of the silicon piezoresistive sensitive element 12 is fixedly connected with a signal amplifier 15 for amplifying the electric signals, and the inner surface of the lower cover plate 14 is fixedly, the inside swing joint of lower apron 14 has cable conductor 18, the lower fixed surface of lower apron 14 is connected with base 19, the solid fixed ring 20 of the solid fixed surface of base 19 is connected with, the side surface of solid fixed ring 20 is provided with external screw thread 21, gu one side fixed connection elastic plate 22 that solid fixed ring 20 kept away from base 19, the side surface fixed connection briquetting 23 of elastic plate 22, the side surface of elastic plate 22 and the one side swing joint opposite with briquetting 23 have the screw cap 24, the internal surface of screw cap 24 is provided with internal thread 25, gu fixed ring 20 passes through external screw thread 21, internal thread 25 and screw cap 24 threaded connection, through twisting cap 24 and forcing elastic plate 22 to take briquetting 23 to push down together, thereby reach and press from both sides cable conductor 18 and press.

The fixing ring 20 is in threaded connection with the screwing cap 24 through the external thread 21 and the internal thread 25, the internal diameter of the screwing cap 24 at one end of the fixing ring 20 is 2 times of that at the other end of the fixing ring, the pressing block 23 is a rubber block, a sealing gasket is arranged at the joint of the threaded column 3 of the cable 18 and the body 1 to prevent the pressing block 23 from damaging the cable, air leakage is prevented, the pressure in the body 1 is normal, the measuring accuracy is improved, the filter screen 6 is a filter metal screen, the signal amplifier 15 is electrically connected with the circuit board 17 through the lead 16, the circuit board 17 is electrically connected with the cable 18, the threaded column 3, the through hole 4, the filter cavity 5, the hydraulic detection port 7 and the receiving channel 8 are arranged on the same vertical axis, the thickness of the diaphragm 10 is 0.3cm-0.5cm and is abutted against the silicon piezoresistive.

The working principle is as follows: when the device is used, the body 1 is fixed on a pipeline by screwing the nut 2, liquid enters the filter cavity 5 through the through hole 4, the liquid is directly acted on the diaphragm 10 through the receiving channel 8 after being filtered by the filter screen 6, the diaphragm 10 generates micro displacement in direct proportion to the pressure of a medium, fluctuation is converted into an electric signal through the silicon piezoresistive sensitive element 12, the electric signal is amplified through the signal amplifier 15 and is transmitted to the circuit board 17 through the lead 16, the circuit board 17 transmits a measured pressure value through the cable conductor 18, the fixing ring 20 is in threaded connection with the screw cap 24 through the external thread 21 and the internal thread 25, the elastic plate 22 is forced to press the pressing block 23 together by screwing the screw cap 24, and therefore the cable conductor 18 is clamped and fixed.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A hydraulic pressure sensor comprising a body (1), characterized in that: the nut (2) is fixedly connected to the side surface of the body (1), the lower surface of the body (1) is movably connected with the lower cover plate (14), the threaded column (3) is fixedly connected to the upper surface of the body (1), the through hole (4) is formed in the threaded column (3), the filter cavity (5) is formed in the body (1) and located below the threaded column (3), the filter screen (6) is fixedly connected to the inner bottom of the filter cavity (5), the hydraulic detection port (7) is formed in the lower surface of the filter cavity (5), the receiving channel (8) is arranged below the hydraulic detection port (7), the placing groove (9) is fixedly connected to one end, far away from the hydraulic detection port (7), of the receiving channel (8), the diaphragm (10) is arranged in the placing groove (9), and the spring (11) is fixedly connected to the side surface of the placing groove (9), one end, far away from the placing groove (9), of the spring (11) is fixedly connected with the body (1), the lower surface of the placing groove (9) is fixedly connected with a silicon piezoresistive sensitive element (12), the side surface of the silicon piezoresistive sensitive element (12) is fixedly connected with a rubber ring (13), the lower surface of the silicon piezoresistive sensitive element (12) is fixedly connected with a signal amplifier (15), the inner surface of the lower cover plate (14) is fixedly connected with a circuit board (17), the inner part of the lower cover plate (14) is movably connected with a cable wire (18), the lower surface of the lower cover plate (14) is fixedly connected with a base (19), the lower surface of the base (19) is fixedly connected with a fixing ring (20), the side surface of the fixing ring (20) is provided with an external thread (21), and one side, far away from the base (19), of the fixing ring, the side surface of the elastic plate (22) is fixedly connected with a pressing block (23), one side of the side surface of the elastic plate (22) opposite to the pressing block (23) is movably connected with a screwing cover (24), and the inner surface of the screwing cover (24) is provided with an internal thread (25).

2. A hydraulic pressure sensor as claimed in claim 1, wherein: the fixing ring (20) is in threaded connection with the screw cap (24) through an external thread (21) and an internal thread (25), the internal diameter of one end, located on the fixing ring (20), of the screw cap (24) is 2 times that of the internal diameter of the other end of the fixing ring, and the pressing block (23) is a rubber block.

3. A hydraulic pressure sensor as claimed in claim 1, wherein: the connecting part of the threaded column (3) and the body (1) is provided with a sealing gasket, and the filter screen (6) is a filter metal screen.

4. A hydraulic pressure sensor as claimed in claim 1, wherein: the signal amplifier (15) is electrically connected with the circuit board (17) through a lead (16), and the circuit board (17) is electrically connected with the cable (18).

5. A hydraulic pressure sensor as claimed in claim 1, wherein: the threaded column (3), the through hole (4), the filter cavity (5), the hydraulic detection port (7) and the receiving channel (8) are arranged on the same vertical shaft.

6. A hydraulic pressure sensor as claimed in claim 1, wherein: the diaphragm (10) is 0.3cm-0.5cm thick and is abutted against the silicon piezoresistive sensitive element (12), and the silicon piezoresistive sensitive element (12) is electrically connected with the signal amplifier (15).