CN211347169U

CN211347169U - Soil pressure sensor of anti overload pressure

Info

Publication number: CN211347169U
Application number: CN201922133811.XU
Authority: CN
Inventors: 胡华
Original assignee: Guangzhou Ruite Sensor Instrument Co ltd
Current assignee: Guangzhou Ruite Sensor Instrument Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-08-25
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a soil pressure measurement field, a special design anti soil pressure sensor of overload pressure, which comprises a body, including bellows device and shell device on the body, the bellows device includes the bellows main part, be equipped with sensor core, baffle, spring, slider, sealing screw, ripple diaphragm, oil filler point, wire, modulate circuit and ring type clamping ring in the bellows main part, the shell device includes flange shell, joint, buckle and encapsulation diaphragm, the bellows device sets up inside the cavity of shell device. The utility model discloses the practicality is strong, can guarantee that the sensor core can not receive too big pressure impact when measuring soil pressure to can get back to zero value when no pressure measurement pressure.

Description

Soil pressure sensor of anti overload pressure

Technical Field

The utility model relates to a soil pressure measurement field especially relates to an anti overload pressure's soil pressure sensor.

Background

The pressure sensor is a device for measuring pressure, is widely applied to various industrial automatic control environments and relates to water conservancy and hydropower, railway traffic, buildings and the like. For the aspect of detection of cement mortar, a soil pressure sensor is used at present, the monitoring of soil pressure in geotechnical engineering is very important, the real-time monitoring of soil in engineering construction can be realized, the safety of engineering construction is guaranteed, and meanwhile, important basis can be provided for design and scientific research.

Utility model publication specification CN201520930453.4 discloses a zero earth pressure sensor that meets an emergency, this sensor technical scheme controls the oil pressure of hydraulic oil intracavity through actuating mechanism drive piston, utilizes the oil pressure to come balanced outside soil pressure, makes outer elastic membrane be in no deformation state all the time, and only inner elastic membrane takes place to warp, has avoided soil arch effect and soil body to shift like this to the liquid pressure that makes inner elastic membrane measure is soil pressure promptly, and measuring result is more accurate.

However, the soil pressure sensor has some disadvantages, such as an integrated sensor which is the same as the existing soil pressure sensor, and because the sensor capsule is used for measuring the soil pressure, the sensor capsule is easy to wear, the overshoot pressure is large, the pressure probe is easy to damage, the service life is short, and the capsule can be directly scrapped after being damaged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve current technical problem and provide an anti overload pressure's soil pressure sensor, this soil pressure sensor can increase sensor life to the structural design that can automatic recovery zero value has been adopted.

The above object of the present invention is achieved by the following technical solutions:

an overload pressure resistant soil pressure sensor comprises a body; the body comprises an outer shell device and a diaphragm capsule device, the diaphragm capsule device comprises a diaphragm capsule main body, a sensor core body for pressure measurement is arranged on the diaphragm capsule main body, a baffle plate for protecting the sensor core body is further arranged on the diaphragm capsule main body, a slide block and a spring for limiting the position of the baffle plate are arranged on the side edge of the baffle plate, the lower end of the baffle plate is connected with a corrugated diaphragm for transmitting pressure in a laminating manner, an oil filling hole for filling oil in the diaphragm capsule main body is further arranged on the diaphragm capsule main body, a sealing screw is arranged on the oil filling hole, the diaphragm capsule device further comprises a ring-shaped pressure ring for packaging the diaphragm capsule main body, a conditioning circuit is connected to the upper end of the ring-shaped pressure ring, the conditioning circuit is fixedly connected with a lead, the outer shell device comprises a flange outer shell, and two sides of the packaging membrane are provided with retaining rings for fixing the packaging membrane.

Preferably, when the baffle is forced to displace, the baffle is limited by the spring, the sliding block and the hollow oil pipe structure inside the capsule main body to the maximum displacement.

Preferably, when the soil pressure sensor is not stressed, the spring pushes the baffle back to the original position of the baffle due to the elastic structure of the spring.

Preferably, the flange housing is a housing of a hollow flange connection structure.

Preferably, the bellows body is an internal hollow tubing structure.

Preferably, the bellows body is disposed within a hollow cavity of the flange housing.

Preferably, the capsule body has a diameter width equal to the diameter width of the internal hollow cavity of the flange housing.

Preferably, the packaging membrane is a tetrafluoroethylene membrane.

Preferably, the diameter width of the sealing screw is equal to that of the oil filling hole.

Compared with the prior art, the utility model the advantage be:

this soil pressure sensor has abandoned the whole shell structure of diaphragm capsule among the traditional art, adopts split type diaphragm capsule structure, and such structure easily processes, can improve machining efficiency and can also reduce the processing cost, possesses the function that can more change the diaphragm capsule body simultaneously, and anti overload pressure is strong to can resume zero value automatically, great improvement sensor whole life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the structure a housing device of fig. 1.

Fig. 3 is a schematic structural view of the bellows device of fig. 1 in a B-configuration.

In fig. 1 to 3, a body 1; a joint 2; a retaining ring 3; a packaging film 4; a wire 5; a conditioning circuit 6; an annular compression ring 7; a sensor core 8; a spring 9; a sealing screw 10; a baffle plate 11; a slider 12; a corrugated diaphragm 13; a bellows body 14; a flange housing 15; an oil filler hole 16.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, the soil pressure sensor against overload pressure comprises a body 1, wherein the body 1 comprises a shell device and a capsule device.

The best embodiment of this example is: the housing device shown in fig. 1 and 2 is the structure a shown in fig. 1, and is composed of a flange housing 15, a connector 2, an encapsulation membrane 4 and a retaining ring 3, the flange housing 15 is of a hollow structure inside, the external structure is of a long cylindrical shape, a flange bolt hole is formed in the top of the flange housing 15, the flange bolt hole can be connected with the flange housing, the connector 2 is welded in the middle of the top of the flange housing 15, the encapsulation membrane 4 is fixed at the bottom of the flange housing 15 by the retaining ring 3 at the bottom of the flange housing 15, the encapsulation membrane 4 is most preferably a tetrafluoroethylene membrane, and tetrafluoroethylene has good corrosion resistance;

and, fig. 1 and fig. 3 the membrane cassette set up the B structure of fig. 1, the membrane cassette device comprises wire 5, modulate circuit 6, annular clamping ring 7, sensor core 8, spring 9, sealing screw 10, baffle 11, slider 12, ripple diaphragm 13, membrane cassette main part 14 and oil filler point 16, the one end hot melt of wire 5 connects modulate circuit 6, the other end hot melt of wire 5 connects the joint 2 of A structure, 14 inside hollow oil pipe cavity structures of membrane cassette device, 14 inside hollow oil pipe cavity of membrane cassette device is provided with

sensor core

8, 14 upper ends of membrane cassette main part are provided with annular clamping ring 7 that is used for encapsulating membrane cassette main part 14, annular clamping ring 7 is the hollow cylinder structure, modulate circuit 6 is connected with 8 hot melt of sensor core through the inside cavity of

annular clamping ring

7, 14 lower extreme of membrane cassette main part is provided with baffle 11 that is used for protecting sensor core 8, be provided with the spring 9 that the cylinder circled the appearance between baffle 11 and the sensor core 8, spring 9 is vertical to be fixed in the oil pipe between sensor core 8 and the baffle 11, the left and right sides of baffle 11 is provided with slider 12, and slider 12 is used for controlling baffle 11 and avoids controlling excessive skew, the lower extreme welding of baffle 11 has the ripple diaphragm 13 that is used for transmitting pressure, bellows main part side is provided with oil filler point 16, and oil filler point 16 is used for the inside hollow oil pipe oiling of bellows main part 14, and the back that the oiling finishes will seal screw 10 installation and fix on oil filler point 16.

The working steps are as follows:

connecting a lead 5 of a structure B to the lower end of a joint 2 of a structure A, injecting oil into an oil injection hole 16, installing and fixing the lead on the oil injection hole 16 by using a sealing screw 10 after the oil injection is finished, then putting the structure B into a cylindrical cavity at the lower end of the structure A, fixing a packaging diaphragm 4 at the lower end of a corrugated diaphragm 13 by using a retaining ring 3 and sealing the cavity inside the structure A, operating the body, transmitting the earth pressure to the packaging diaphragm 4, transmitting the earth pressure to the corrugated diaphragm 13 by the packaging diaphragm 4, transmitting the earth pressure to filling oil inside a diaphragm main body 14 by the corrugated diaphragm 13, transmitting the pressure to a sensor core body 8 by the filling oil, completing the whole measurement process, when in measurement, a pressure baffle 11 can displace towards the sensor core body 8, a spring 9 and a sliding block 12 can limit the displacement of the baffle so as to ensure that the sensor core body 8 is not subjected to excessive pressure, when the packaging membrane 4 is not stressed, the spring 9 can push the baffle plate 11 back to the initial position, and the zero value in the absence of pressure is ensured.

The above description specifically describes the preferred embodiments of the present invention, but of course, the present invention can also adopt different forms from the above embodiments, and equivalent changes or corresponding modifications made by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. An earth pressure sensor resisting overload pressure comprises a body (1); the novel capsule device is characterized in that the body (1) comprises an outer shell device and a capsule device, the capsule device comprises a capsule main body (14), a sensor core body (8) for pressure measurement is arranged on the capsule main body (14), a baffle (11) for protecting the sensor core body (8) is further arranged on the capsule main body (14), a slider (12) and a spring (9) for limiting the position of the baffle are arranged on the side edge of the baffle (11), a corrugated diaphragm (13) for transmitting pressure is attached to the lower end of the baffle (11), an oil filling hole (16) for filling oil inside the capsule main body (14) is further arranged on the capsule main body (14), a sealing screw (10) is arranged on the oil filling hole (16), the capsule device further comprises an annular pressure ring (7) for encapsulating the capsule main body (14), and an annular conditioning circuit (6) is connected to the upper end of the annular pressure ring (7), the conditioning circuit (6) is fixedly connected with the lead (5), the shell device comprises a flange shell (15), a joint (2) is arranged at the top end of the flange shell (15), a packaging diaphragm (4) used for packaging the flange shell (15) is further arranged at the bottom end of the flange shell (15), and retaining rings (3) used for fixing the packaging diaphragm (4) are arranged on two sides of the packaging diaphragm (4).

2. The earth pressure sensor against overload pressure according to claim 1, wherein: when the baffle (11) is stressed to displace, the baffle (11) is limited by the spring (9), the sliding block (12) and the hollow oil pipe structure position in the bellows main body (14) to the maximum displacement of the baffle (11).

3. The earth pressure sensor against overload pressure according to claim 2, wherein: when the soil pressure sensor is not stressed, the spring (9) can push the baffle (11) back to the original position of the baffle (11) due to the elastic structure of the spring (9).

4. The earth pressure sensor against overload pressure according to claim 3, wherein: the flange shell (15) is a shell of a hollow flange connection structure.

5. The earth pressure sensor against overload pressure according to claim 4, wherein: the capsule body (14) is of an internal hollow oil pipe structure.

6. The earth pressure sensor against overload pressure according to claim 5, wherein: the bellows body (14) is disposed within a hollow cavity of the flange housing (15).

7. The earth pressure sensor against overload pressure according to claim 6, wherein: the diameter width of the capsule main body (14) is equal to the diameter width of the inner hollow cavity of the flange shell (15).

8. The earth pressure sensor against overload pressure according to claim 7, wherein: the packaging membrane (4) is a tetrafluoroethylene membrane.

9. The earth pressure sensor against overload pressure according to claim 8, wherein: the diameter width of the sealing screw (10) is equal to that of the oil filling hole (16).