CN212058976U

CN212058976U - Rod-type level gauge suitable for sewage pump station

Info

Publication number: CN212058976U
Application number: CN202020703044.1U
Authority: CN
Inventors: 陈好学; 苏炜; 张彬; 臧宾帮
Original assignee: Shandong Broadcontrol Electromechanical Co ltd
Current assignee: Shandong Broadcontrol Electromechanical Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-01
Anticipated expiration: 2030-04-30

Abstract

The invention discloses a rod type liquid level meter suitable for a sewage pump station, which comprises an instrument gauge head, wherein the instrument gauge head is connected with a weighing sensor through a sensor cable, the weighing sensor is connected with a buoyancy rod through a stainless steel soft rope, the buoyancy rod is inserted into water, and a guide sliding sleeve is arranged outside the buoyancy rod. A fixed measuring rod is adopted, a weighing mode is adopted, and different liquid levels are converted according to different floatage forces received by different liquid level measuring rods. Due to the adoption of the rigid rod, the inaccurate measurement caused by the impact of water flow on foam and the like can be completely avoided.

Description

Rod-type level gauge suitable for sewage pump station

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a rod type liquid level meter suitable for a sewage pump station.

Background

Sewage treatment plants, sewage pumping stations, raindrop tanks and the like all need to measure liquid levels in real time. Currently, a large number of liquid level meters are used, such as an ultrasonic liquid level meter, a drop-in static pressure type liquid level meter, a floating ball type liquid level meter and the like. Due to the complexity of sewage components, a large amount of silt, garbage, floating objects, foam and the like are contained, the sensor of the static pressure type sensor is often buried by the silt, the foam interferes with the ultrasonic sensor, the phenomenon that a floating ball is blocked or a connecting rod is broken due to the fact that water flow impacts the floating ball type sensor is caused, liquid level measurement is inaccurate or cannot be measured, and the condition that a control system fails or equipment is damaged is caused.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a rod type liquid level meter suitable for a sewage pump station.

The invention is realized by the following technical scheme:

the utility model provides a rod-type level gauge suitable for sewage pump station, includes the instrument gauge outfit, the instrument gauge outfit passes through sensor cable junction weighing sensor, weighing sensor passes through the stainless steel soft rope and connects the buoyancy pole, the buoyancy pole is inserted in the water body, the outside of buoyancy pole is equipped with the direction sliding sleeve.

Preferably, the gauge outfit is fixed in the instrument box, and the instrument box is fixed on the pond bank.

Preferably, the load cell is secured above the pool wall by a sensor bracket.

Preferably, the guide sliding sleeve is fixed on the pool wall through a sliding sleeve bracket.

The invention has the beneficial effects that: a fixed measuring rod is adopted, a weighing mode is adopted, and different liquid levels are converted according to different floatage forces received by different liquid level measuring rods. Due to the adoption of the rigid rod, the inaccurate measurement caused by the impact of water flow on foam and the like can be completely avoided.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a front view of a lever type level gauge for a sewage pumping station according to an embodiment of the present invention.

1. The instrument head 2, the instrument box 3, the sensor cable 4, the sensor fixing support 5, the weighing sensor 6, the stainless steel soft rope 7, the guide sliding sleeve 8, the sliding sleeve support 9, the buoyancy rod 10, the pool wall 11 and the water body.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

With reference to fig. 1, this embodiment is applicable to rod-type level gauge of sewage pump station, including the instrument gauge outfit, the instrument gauge outfit passes through sensor cable junction weighing sensor, weighing sensor passes through the stainless steel soft rope and connects the buoyancy pole, the buoyancy pole inserts in the water, the outside of buoyancy pole is equipped with the direction sliding sleeve.

In this embodiment, the gauge outfit is fixed in the instrument box, the instrument box is fixed on the pond bank. The weighing sensor is fixed above the pool wall through a sensor bracket. The guide sliding sleeve is fixed on the pool wall through a sliding sleeve bracket.

As shown in figure 1, a sensor fixing bracket 4 fixes a weighing sensor 5 on the wall of the pool, the weighing sensor vertically hoists a buoyancy rod 9 through a stainless steel soft rope 6, and the buoyancy rod penetrates through a guide sliding sleeve 7 and is inserted into a water body 11.

The buoyancy rod is preferably made of stainless steel tube filled balance weight or composite material, and needs to be precisely weighed before installation. The weight/volume ratio of the prepared weighing sensor is preferably 1-5, the ratio is too small and is easy to be impacted by water flow, so that the reading is unstable, and the measurement error is larger due to larger precision loss of the weighing sensor with too large ratio. The general principle is as follows: the place ratio that water flow impact is not big can be some littleer, and the place ratio that water flow impact is great will increase, and the too big place of impact can be considered around the buoyancy pole with a cell body fixed mounting bottom with the protecting against shock surrounding tube of water UNICOM with the buoyancy pole package, but this surrounding tube should not contact with the buoyancy pole, and must be good with the water UNICOM.

The buoyancy pole is hoisted through the stainless steel soft rope, can avoid the vibrations that water impact leads to influence the sensor precision, and the polytetrafluoroethylene lining of direction sliding sleeve inside lining simultaneously, with buoyancy pole sliding fit, can avoid because the reading that the violent undulant of water level brought is unstable.

Liquid level measurement principle:

net weight of the buoyancy rod: g weighing sensor measurement: buoyancy received by the N buoyancy rods: f, liquid level: h

Height of bottom of buoyancy rod from bottom of pool (measurement dead zone): l, the depth of the buoyancy rod entering the water body: l buoyancy rod diameter: d, assuming that the sewage density is 1, the calculation process is as follows:

L=4F/πD² H=l+4F/πD² F=G-N

thus, an expression is obtained for the sensor measurement N: h = l +4 (G-N)/pi D

The actual measurement can be set in the instrument once after the instrument is installed, so that the real liquid level value can be obtained through the operation of the single chip microcomputer in the meter head. If the local display is not needed, a sensor with standard signal output can be directly connected into the automatic control system, and the sensor is operated according to the formula and then used as a control basis and displayed on a central control computer.

The meter head can be designed and reserved with various interfaces, such as relay output and alarm output of 4-20mA, 485, high liquid level, low liquid level and low liquid level, or the existing weighing meter head is utilized to rewrite operation and display procedures.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. The utility model provides a rod-type level gauge suitable for sewage pump station which characterized in that: including the instrument gauge outfit, the instrument gauge outfit passes through sensor cable junction weighing sensor, weighing sensor passes through the stainless steel soft rope and connects the buoyancy pole, the buoyancy pole inserts in the water body, the outside of buoyancy pole is equipped with the direction sliding sleeve.

2. The rod-type liquid level gauge suitable for the sewage pumping station according to claim 1, wherein: the gauge outfit is fixed in the instrument box, the instrument box is fixed on the pond bank.

3. The rod-type liquid level gauge suitable for the sewage pumping station according to claim 1, wherein: the weighing sensor is fixed above the pool wall through a sensor bracket.

4. The rod-type liquid level gauge suitable for the sewage pumping station according to claim 1, wherein: the guide sliding sleeve is fixed on the pool wall through a sliding sleeve bracket.