Soil pressure sensor of anti overload pressure
阅读说明:本技术 一种抗过载压力的土压力传感器 (Soil pressure sensor of anti overload pressure ) 是由 胡华 于 2019-12-02 设计创作,主要内容包括:本发明涉及土压力测量领域,特别设计一种抗过载压力的土压力传感器,包括本体,所述本体上包括膜盒装置和外壳装置,所述膜盒装置包括膜盒主体,所述膜盒主体内设有传感器芯体、挡板、弹簧、滑块、封口螺丝、波纹膜片、注油孔、导线、调理电路和环型压环,所述外壳装置包括法兰外壳、接头、扣环和封装膜片,所述膜盒装置设置于外壳装置的空腔内部。本发明实用性强,能保证测量土压力时传感器芯体不会受过大的压力冲击,并且无压力测量压力时能够回到零点值。(The invention relates to the field of soil pressure measurement, in particular to an overload pressure resistant soil pressure sensor which comprises a body, wherein the body comprises a diaphragm box device and a shell device, the diaphragm box device comprises a diaphragm box main body, a sensor core body, a baffle, a spring, a sliding block, a sealing screw, a corrugated diaphragm, an oil injection hole, a lead, a conditioning circuit and a ring-shaped pressing ring are arranged in the diaphragm box main body, the shell device comprises a flange shell, a joint, a retaining ring and a packaging diaphragm, and the diaphragm box device is arranged in a cavity of the shell device. The invention has strong practicability, can ensure that the sensor core body is not impacted by overlarge pressure when measuring the soil pressure, and can return to a zero value when no pressure is measured.)
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 most preferably 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).
Technical Field
The invention relates to the field of soil pressure measurement, in particular to an overload pressure resistant 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.
Disclosure of Invention
The invention provides an overload pressure resistant soil pressure sensor for solving the prior technical problems, which can prolong the service life of the sensor and adopts a structural design capable of automatically restoring a zero value.
The above object of the present invention is achieved by the following technical means:
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 film is most preferably a tetrafluoroethylene film.
Preferably, the diameter width of the sealing screw is equal to that of the oil filling hole.
Compared with the prior art, the invention has the advantages that:
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 view 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
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the soil pressure sensor against overload pressure comprises a
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
and, fig. 1 and fig. 3 the membrane cassette set up the B structure of fig. 1, the membrane cassette device comprises
The working steps are as follows:
connecting a
While the preferred embodiments of the present invention have been illustrated and described, it will be appreciated that the invention may be embodied otherwise than as specifically described and that equivalent alterations and modifications, which may be effected thereto by those skilled in the art without departing from the spirit of the invention, are deemed to be within the scope and spirit of the invention.
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