CN215374128U

CN215374128U - Maintenance-free sewage pit liquid level measuring device

Info

Publication number: CN215374128U
Application number: CN202120852965.9U
Authority: CN
Inventors: 张学志; 孙英凯; 宗源
Original assignee: Tianjin Xiaowo Environmental Protection Engineering Co ltd
Current assignee: Tianjin Xiaowo Environmental Protection Engineering Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-12-31
Anticipated expiration: 2031-04-23

Abstract

The utility model relates to the technical field of sewage treatment equipment, in particular to a maintenance-free sewage pit liquid level measuring device. Comprises a throwing-in pressure transmitter, a buffer tube and a flushing water pipe; the input pressure transmitter comprises a sensor connected by a cable, and the sensor is arranged at the bottom of the medium and used for measuring the bottom pressure of the medium; the buffer tube is sleeved outside the sensor; the bottom of the buffer tube is closed, and the top of the buffer tube is connected with a sewage pit cover; a plurality of round holes are uniformly arranged on the wall of the buffer tube; one end of the flushing water pipe is connected with a water source, the other end of the flushing water pipe penetrates through the bottom of the buffer pipe and faces the sensor, and a ball valve for controlling water flow and opening state is arranged on the flushing water pipe. The device utilizes the advantages of the drop-in pressure transmitter, slows down the flow of liquid through the buffer tube and limits the moving range of the cable, thereby realizing the stable measurement of the liquid level of the pit; and a flushing water pipeline is additionally arranged at the bottom of the buffer tube to flush the sensor, so that the measurement precision is ensured.

Description

Maintenance-free sewage pit liquid level measuring device

Technical Field

The utility model relates to the technical field of sewage treatment equipment, in particular to a maintenance-free sewage pit liquid level measuring device.

Background

The maintenance frequency of the sump liquid level measuring device with the stirrer is always high, the selection range of the liquid level transmitter is limited by medium turbidity, easy precipitation, large liquid level fluctuation due to the stirrer and underground medium, and common instruments mainly comprise a guided wave radar liquid level meter, an ultrasonic liquid level meter and a radar liquid level meter. Radar level gauges are best used, but are very expensive; the waveguide tube of the guided wave radar liquid level meter is inserted into a medium, and the use of the meter is influenced by the sediment of the medium attached to the waveguide tube after a long time, the meter needs to be pulled out and cleaned, and the maintenance is complicated and the frequency is high; the ultrasonic liquid level meter is a non-contact measuring meter, medium is turbid and easy to precipitate, and liquid level fluctuation has little influence on the ultrasonic liquid level meter, but because the medium can generate water mist, the water mist can be condensed into water drops when contacting a sensor of the meter to influence the use of the meter, the meter needs to be drawn out to clean the water drops on the sensor, and the maintenance frequency is very high if the medium generates more water mist; the throwing-in pressure transmitter can stably measure the liquid level of turbid and easily-precipitated media and does not need maintenance, but has the defects that a mooring rope and a sensor of the throwing-in pressure transmitter are thrown to the bottom of the media and can swing in the liquid under the influence of the stirrer, and the mooring rope can be wound on the stirrer to cause equipment damage under the conditions that the opening area of a sewage pit is small and the water depth is large.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the background art, the utility model aims to provide a maintenance-free sewage pit liquid level measuring device, which utilizes the advantages of a drop-in pressure transmitter, slows down the flow of liquid through a buffer tube and limits the moving range of a cable, thereby realizing the stable measurement of the liquid level of a pit; and a flushing water pipeline is additionally arranged at the bottom of the buffer tube to flush the sensor, so that the measurement precision is ensured.

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

a maintenance-free sewage pit liquid level measuring device comprises a drop-in pressure transmitter and a buffer pipe; the input pressure transmitter comprises a sensor connected by a cable, and the sensor is arranged at the bottom of the medium and used for measuring the bottom pressure of the medium; the buffer tube is sleeved outside the sensor; the bottom of the buffer tube is closed, and the top of the buffer tube is connected with a sewage pit cover; the wall of the buffer tube is evenly provided with a plurality of round holes.

And furthermore, the device also comprises a flushing water pipeline, one end of the flushing water pipeline is connected with a water source, the other end of the flushing water pipeline penetrates through the bottom of the buffer pipe and is opposite to the sensor, and a ball valve for controlling water flow and opening state is arranged on the flushing water pipeline.

Further, the buffer tube is made of a 304 stainless steel tube with the size of DN80, and the hole diameter of the hole is 10 mm.

Further, the flush water pipe and the ball valve are each DN20 in size.

Compared with the prior art, the utility model has the beneficial effects that:

the device utilizes the advantages of the drop-in pressure transmitter, slows down the flow of liquid through the buffer tube and limits the moving range of the cable, thereby realizing the stable measurement of the liquid level of the pit; and a flushing water pipeline is additionally arranged at the bottom of the buffer tube to flush the sensor, so that the measurement precision is ensured.

Drawings

FIG. 1 is a schematic structural view of a sump level measuring device according to the present invention;

fig. 2 is a diagram of the usage of the sump level measurement device according to the utility model.

The labels in the figure are: 1. a drop-in pressure transmitter; 2. a buffer tube; 21. a circular hole; 22. a flange; 3. a sensor; 4. a flushing water pipeline; 5. a ball valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, in an embodiment of the present invention, a maintenance-free sump liquid level measuring device includes a drop-in pressure transmitter 1 and a buffer pipe 2; the drop-in pressure transmitter 1 comprises a sensor 3 connected by a cable, the sensor 3 being dropped into the bottom of the medium, converted into a level signal according to the density of the medium, for measuring the bottom pressure of the medium; the buffer tube 2 is sleeved outside the sensor 3; the bottom of the buffer tube 2 is closed, and the top of the buffer tube is connected with a sewage pit cover through a 304 stainless steel flange with the size of DN 80; the pipe wall of the buffer pipe is uniformly provided with a plurality of round holes 21, the round holes on the buffer pipe can effectively slow down the liquid rotating speed so as to reduce the impact on the sensor, limit the moving range of the cable, avoid the sensor from swinging in a medium and also prevent objects with large area from entering the buffer pipe to influence the sensor; preferably, the buffer tube is made of a 304 stainless steel tube with size DN80, and the hole diameter is 10 mm.

Preferably, the top of the buffer tube 2 is provided with a flange 22, and the flange is connected with the sewage pit cover through a matched bolt and nut;

because the sediment material is more in the sump pit, long-time operation sediment can wrap up on the sensor, influences the measurement accuracy of liquid level, for this reason increases washing water pipeline 4 at the buffer tube bottom and washes the sensor, guarantees measurement accuracy. One end of the flushing water pipe is connected with a water source, the other end of the flushing water pipe penetrates through the bottom of the buffer pipe and faces the sensor, a ball valve 5 for controlling water flow and an opening state is arranged on the flushing water pipe 4, internal flushing water flows out at a small flow, precipitates of media near the sensor are diluted, the sensor is kept clean constantly, and measuring accuracy is not influenced. Preferably, the flushing water pipe consists of a 304 stainless steel pipe and a 304 stainless steel ball valve, and the sizes of the flushing water pipe and the 304 stainless steel ball valve are DN 20.

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 various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a non-maintaining sump pit liquid level measurement device which characterized in that: comprises a throwing pressure transmitter and a buffer pipe; the input pressure transmitter comprises a sensor connected by a cable, and the sensor is arranged at the bottom of the medium and used for measuring the bottom pressure of the medium; the buffer tube is sleeved outside the sensor; the bottom of the buffer tube is closed, and the top of the buffer tube is connected with a sewage pit cover; the wall of the buffer tube is evenly provided with a plurality of round holes.

2. The maintenance-free sump level measurement device of claim 1, wherein: the water source is connected to one end of the flushing water pipe, the other end of the flushing water pipe penetrates through the bottom of the buffer pipe and faces the sensor, and a ball valve for controlling water flow and opening is arranged on the flushing water pipe.

3. The maintenance-free sump level measurement device of claim 1, wherein: the buffer tube is made of a 304 stainless steel tube with the size of DN80, and the aperture of the opening is 10 mm.

4. The maintenance-free sump level measurement device of claim 2, wherein: the sizes of the flushing water pipeline and the ball valve are DN 20.