CN215003823U

CN215003823U - Excrement overflow sensor

Info

Publication number: CN215003823U
Application number: CN202121503267.4U
Authority: CN
Inventors: 蒋永源
Original assignee: Shenzhen Dingzhen Technology Co ltd
Current assignee: Shenzhen Dingzhen Technology Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-12-03
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a feces overflow sensor, which comprises a middle tube, an upper cover, a lower cover, a connecting terminal, a sensor PCB board and a signal wire; the upper cover is arranged at the upper end of the middle pipe and seals the upper end opening of the middle pipe; the lower cover is arranged at the lower end of the middle pipe and seals the lower end opening of the middle pipe; the wiring terminal is arranged on the upper cover; the sensor PCB is fixed on the lower cover through sealant, the sensor PCB is tightly attached to the lower cover, and the sensor PCB is provided with an induction capacitor; the signal wire is arranged in the middle pipe, one end of the signal wire is in conductive connection with the wiring terminal, and the other end of the signal wire is in conductive connection with the sensor PCB. Through setting up the sensor PCB board on the lower cover, utilize the inductive capacitance on the sensor PCB board to detect whether there is liquid to exist, need not throw into the liquid dung the inside, sensor lower extreme and liquid dung microcontact or contactless, service environment is good, and the sensor is longe-lived, and the response precision is high, maintains also convenience very.

Description

Excrement overflow sensor

Technical Field

The utility model belongs to the technical field of the sensor technique and specifically relates to indicate an excrement overflow sensor.

Background

The toilet revolution refers to a measure for improving toilets in developing countries, which was originally proposed by the foundation of the united nations for children, and the improvement of the sanitary conditions of the toilets is an important mark for civilization and is directly related to the health and environmental conditions of people in these countries. Excrement can pollute food and water sources, cause intestinal diseases and cause loss of lives of 150 million children less than five years of age worldwide each year.

The excrement overflow sensor is specially developed for monitoring the height of excrement in the septic tank, giving an alarm in time, ensuring that sanitation personnel drain the excrement in time and preventing the excrement from overflowing.

The traditional method is to use a pressure sensor to sense the height of the liquid dung, the sensor needs to be put into the liquid dung, the sensor is corroded by the liquid dung for a long time, the service life is extremely short, and the maintenance is inconvenient. Therefore, there is a need to develop a solution to the above problems.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to the deficiency of the prior art, and the main objective of the present invention is to provide a fecal overflow sensor, which can effectively solve the problems of short service life and inconvenient maintenance of the prior fecal overflow sensor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a fecal overflow sensor comprises a middle tube, an upper cover, a lower cover, a wiring terminal, a sensor PCB and a signal wire; the upper cover is arranged at the upper end of the middle pipe and seals the upper end opening of the middle pipe; the lower cover is arranged at the lower end of the middle pipe and seals the lower end opening of the middle pipe; the wiring terminal is arranged on the upper cover; the sensor PCB is fixed on the lower cover through sealant, the sensor PCB is tightly attached to the lower cover, and the sensor PCB is provided with an induction capacitor; the signal wire is arranged in the middle pipe, one end of the signal wire is in conductive connection with the wiring terminal, and the other end of the signal wire is in conductive connection with the sensor PCB.

Preferably, the connecting terminal is fixedly connected with the upper cover through a nut.

Preferably, the upper cover and the lower cover are fixedly connected with the middle pipe through glue.

Preferably, the middle pipe, the upper cover and the lower cover are all made of plastic materials.

Preferably, the plastic material is PVC, PVC-U, PP, PMMA or PPR.

Preferably, the thickness of the lower cover ranges from 0.5 mm to 15 mm.

Preferably, the middle pipe, the upper cover and the lower cover are all round, square or oval.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:

through setting up the sensor PCB board on the lower cover, utilize the inductive capacitance on the sensor PCB board to detect whether there is liquid to exist, need not throw into the liquid dung the inside, sensor lower extreme and liquid dung microcontact or contactless, service environment is good, and the sensor is longe-lived, and the response precision is high, maintains also convenience very.

Drawings

Fig. 1 is a schematic cross-sectional view of a preferred embodiment of the present invention.

The attached drawings indicate the following:

10. middle tube 20, upper cover

30. Lower cover 40 and wiring terminal

50. Sensor PCB 60, signal line

70. Sealant 80 and screw cap

Detailed Description

Referring to fig. 1, a specific structure of a preferred embodiment of the present invention is shown, which includes a middle tube 10, an upper cover 20, a lower cover 30, a connection terminal 40, a sensor PCB 50 and a signal line 60.

The upper cover 20 is arranged at the upper end of the middle pipe 10 and seals the upper end opening of the middle pipe 10; the lower cap 30 is disposed at the lower end of the middle tube 10 and seals the lower end opening of the middle tube 10; in this embodiment, the upper cover 20 and the lower cover 30 are fixedly connected with the middle pipe 10 through glue, so that the assembly efficiency is improved, and the sealing performance is improved, the middle pipe 10, the upper cover 20 and the lower cover 30 are made of plastic materials, the plastic materials are PVC, PVC-U, PP, PMMA or PPR and the like, the thickness range of the lower cover 30 is 0.5-15mm, and the middle pipe 10, the upper cover 20 and the lower cover 30 are circular, square or oval and the like.

The connecting terminal 40 is arranged on the upper cover 20; the sensor PCB 50 is fixed on the lower cover 30 through the sealant 70, an induction capacitor (not shown) is arranged on the sensor PCB 50, and the sensor PCB 50 is tightly attached to the lower cover 30, so that the heat dissipation efficiency of electronic components is improved, and the service life of the sensor is prolonged; the signal line 60 is arranged in the middle tube 10, one end of the signal line 60 is in conductive connection with the wiring terminal 40, the other end of the signal line 60 is in conductive connection with the sensor PCB 50, and the signal line 60 is sealed in the middle tube 10 and is prevented from being in contact with a damp and corrosive environment. In this embodiment, the connection terminal 40 is fixedly connected to the upper cover 20 by a nut 80.

Detailed description the working principle of the present embodiment is as follows:

during the use, this product is installed in the liquid dung top to with binding post 40 connection external control circuit, need not throw into the liquid dung the inside, the lower extreme and the liquid dung of this product contact a little or not, service environment is good, the sensor is longe-lived, and the response precision is high. This product is whether to utilize the inductive capacitance of liquid dung to detect to have liquid to exist, when no liquid is close lower cover 30, because the existence of distribution capacitance on the sensor PCB board 50, consequently, sensor PCB board 50 has certain static capacitance to ground, when the liquid level slowly risees and is close to passing sensor PCB board 50, the parasitic capacitance of liquid will couple to this static capacitance, make the capacitance value grow of sensor PCB board 50, the capacitance signal of change reentrant control IC carries out signal conversion, just think the liquid level to reach the induction point when this change amount exceeds certain threshold value.

The utility model discloses a design key is: through setting up the sensor PCB board on the lower cover, utilize the inductive capacitance on the sensor PCB board to detect whether there is liquid to exist, need not throw into the liquid dung the inside, sensor lower extreme and liquid dung microcontact or contactless, service environment is good, and the sensor is longe-lived, and the response precision is high, maintains also convenience very.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. A manure overflow sensor is characterized in that: the device comprises a middle tube, an upper cover, a lower cover, a wiring terminal, a sensor PCB and a signal wire; the upper cover is arranged at the upper end of the middle pipe and seals the upper end opening of the middle pipe; the lower cover is arranged at the lower end of the middle pipe and seals the lower end opening of the middle pipe; the wiring terminal is arranged on the upper cover; the sensor PCB is fixed on the lower cover through sealant, the sensor PCB is tightly attached to the lower cover, and the sensor PCB is provided with an induction capacitor; the signal wire is arranged in the middle pipe, one end of the signal wire is in conductive connection with the wiring terminal, and the other end of the signal wire is in conductive connection with the sensor PCB.

2. A manure overflow sensor as claimed in claim 1, wherein: the wiring terminal is fixedly connected with the upper cover through a nut.

3. A manure overflow sensor as claimed in claim 1, wherein: the upper cover and the lower cover are fixedly connected with the middle pipe through glue.

4. A manure overflow sensor as claimed in claim 1, wherein: the middle pipe, the upper cover and the lower cover are all made of plastic materials.

5. A manure overflow sensor as claimed in claim 4, wherein: the plastic material is PVC, PVC-U, PP, PMMA or PPR.

6. A manure overflow sensor as claimed in claim 1, wherein: the thickness range of the lower cover is 0.5-15 mm.

7. A manure overflow sensor as claimed in claim 1, wherein: the middle pipe, the upper cover and the lower cover are all round, square or oval.