CN219914570U - Liquid level measuring device of high-temperature sewage underground collection water tank - Google Patents
Liquid level measuring device of high-temperature sewage underground collection water tank Download PDFInfo
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- CN219914570U CN219914570U CN202320670194.0U CN202320670194U CN219914570U CN 219914570 U CN219914570 U CN 219914570U CN 202320670194 U CN202320670194 U CN 202320670194U CN 219914570 U CN219914570 U CN 219914570U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 281
- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 239000010865 sewage Substances 0.000 title claims abstract description 30
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 230000001502 supplementing effect Effects 0.000 claims abstract description 9
- 230000002262 irrigation Effects 0.000 claims description 4
- 238000003973 irrigation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
The utility model discloses a liquid level measuring device of a high-temperature sewage underground collection water tank, which comprises: the system comprises a water outlet pump, a negative pressure transmitter, a first valve and a water seal assembly, wherein the water outlet pump and the negative pressure transmitter are both arranged on the ground, the bottom of the negative pressure transmitter is communicated with the bottom of an underground water tank through a pressure guiding pipe, and the top of the negative pressure transmitter is connected with the water outlet pump through a water filling pipe; the water seal assembly is arranged on the water outlet pipe of the underground water tank and is used for sealing the water outlet pipe of the underground water tank when the pressure guiding pipe is used for filling water, and the water seal assembly is externally connected with a water source and is connected with the inlet pipeline of the water pump through a ball valve so as to realize water supplementing of the water pump and the water tank without the bottom valve; the device has realized the accurate measurement of liquid level under the high temperature sewage environment through the negative pressure changer, and the process of watering easy operation is convenient, has effectively ensured the degree of accuracy that the changer detected, utilizes original water pump that goes out when repeatedly watering, reducible equipment input, low cost and maintenance volume are little.
Description
Technical Field
The utility model relates to the technical field of high-temperature sewage liquid level detection, in particular to a liquid level measuring device of a high-temperature sewage underground collection water tank.
Background
The power equipment area of the cigarette factory is usually provided with an underground water tank, and the main functions of the power equipment area are to collect the periodic high-temperature sewage discharged by a boiler and a heat accumulator, the sewage backwashed by water treatment equipment, the sewage discharged by the bottom of a reaction tank and the like. The part of sewage is collected in a larger amount, so that the sewage is recycled after being pumped to sewage treatment equipment for treatment according to the process requirement, and zero sewage discharge is realized. In order to ensure the automatic control of the water suction pump, the liquid level height of the underground water tank needs to be detected. The high temperature of the sewage discharged by the heat accumulator and the high turbidity of the detection environment caused by the fact that a large amount of lime sediment generated by the timing back flushing of the water treatment equipment enter the water tank bring difficulty to the liquid level measurement of the underground water tank.
Currently, conventional level detection is typically: floating ball type measurement, ultrasonic measurement, laser measurement, static pressure type measurement, negative pressure type measurement and the like, wherein:
the floating ball type liquid level measuring device mainly detects the change of the liquid level by the ascending and descending of the floating ball, is mechanically detected, is easy to influence by buoyancy in detection precision, has poor repetition precision, is not suitable for viscous or impurity-containing liquid, is easy to cause the blockage of the floating ball, and is not suitable for an underground water tank of high-temperature sewage.
Both ultrasonic measurement and laser measurement are affected by high-temperature mist, so that the ultrasonic measurement device is not suitable for the underground water tank of high-temperature sewage.
The static pressure type measurement adopts a pressure sensor (transmitter) arranged at the bottom, liquid level height is calculated through conversion by detecting liquid pressure, but the measurement accuracy is influenced by sludge at the bottom of a water tank, and the sensor is damaged easily due to higher water temperature, so that the static pressure type measurement is not suitable for the use of an underground water tank for high-temperature sewage.
Negative pressure measurement is usually carried out by introducing bottom liquid into a transmitter above the bottom liquid through a pressure guiding pipe, but the water tank needs to be repeatedly calibrated after being cleaned, so that the water filling of the pressure guiding pipe is difficult. Therefore, there is a need for a negative pressure type measuring device for an underground water tank with convenient water filling.
Disclosure of Invention
Aiming at the problems, the inventor provides a liquid level measuring device of a high-temperature sewage underground collection water tank, which adopts a water filling pipe and an original matched water outlet pump to fill water into a pressure guiding pipe of a transmitter, ensures normal detection of the transmitter and greatly reduces the complexity of water filling operation.
Specifically, the utility model is realized as follows:
a liquid level measurement device for a high temperature sewage underground collection tank, comprising:
the negative pressure transmitter is arranged on the ground, the bottom of the negative pressure transmitter is communicated with the bottom of the underground water tank through a pressure guiding pipe, and the top of the negative pressure transmitter is connected with a water outlet pump of the underground water tank through a water filling pipe; when the pressure guiding pipe is used for filling water, the water outlet pump is started to guide water at the bottom of the underground water tank to the negative pressure transmitter from the pressure guiding pipe;
the first valve is arranged on the water filling pipe, and when the water outlet pump and the first valve are both opened, the water filling pipe is filled with water; when the water outlet pump is started and the first valve is closed, the water outlet pipe of the underground water tank normally outputs water;
the water seal assembly is arranged on the water outlet pipe and is connected with the water pump inlet pipeline and used for supplementing water to the water pump, ensuring that the water pump can normally feed water after being started, and further completing the water filling of the pressure guide pipe of the negative pressure transmitter.
Further, the water seal assembly includes:
the water replenishing pipe is arranged between the water filling pipe and the water outlet pump and is used for replenishing water in the water outlet pipe and the water tank without the bottom valve, and a second valve is arranged on the water replenishing pipe and is used for starting/stopping water replenishing;
the bottom valve-free water tank is arranged between the water filling pipe and the water outlet pipe, and the top of the bottom valve-free water tank is provided with a third valve for opening/stopping exhaust;
before the water filling operation, water is filled into the bottomless valve water tank through the water filling pipe, so that the success of water filling of the pressure guiding pipe of the transmitter is ensured.
Further, the water replenishing pipe is connected with the lower part of the bottomless valve water tank, and the water outlet pipe is connected with the upper part of the bottomless valve water tank.
Further, an electromagnetic flowmeter is arranged on the water filling pipe, and when the electromagnetic flowmeter detects that the flow exists, the pressure guiding pipe is filled with water.
Further, the pressure guiding pipe is 15 cm to 25cm away from the bottom of the underground water tank.
Further, the first valve is a needle valve, and the second valve and the third valve are ball valves.
The working principle of the utility model is as follows:
when the liquid level measurement is carried out, the pressure guiding pipe needs to be filled with water (the pipe needs to be completely filled). The irrigation process is as follows:
firstly, a second valve (52) is opened, water is supplemented into a bottomless valve water tank (53) through a water supplementing pipe (51), after the bottomless valve water tank (53) is fully filled with water, a water outlet pump (1) is started manually, after the water outlet pump (1) normally discharges water, a first valve (34) on a water filling pipe (33) is opened, and when an electromagnetic flowmeter (4) detects that flow exists, the first valve (34) is closed, so that water filling is completed.
Liquid level measurement principle: because the transmitter is higher relative to the water tank liquid level, according to the siphon principle, the water in the pressure guiding pipe inevitably generates acting force flowing to the direction of the underground water tank, so that the transmitter bears the negative pressure of the water column of the pressure guiding pipe, the negative pressure value changes along with the change of the water tank liquid level, when the liquid level rises, the absolute value of the negative pressure is reduced, when the liquid level falls, the absolute value of the negative pressure is increased, and the two changes are in a linear corresponding relation, and the liquid level of the water tank can be detected according to the relation. This detection principle is analyzed as follows:
let the underground water tank be H, the transmitter mounting point be H from the top of the water tank 2 The density of water in the pressure guiding pipe is ρ, the liquid level in the water tank is h, and the height of the water surface from the top of the water tank is h 1 。
The balance diaphragm of the pressure transmitter is used as a stress acting surface, and according to static pressure characteristics: the two sides of the stress acting surface have equal acting forces and opposite directions, and the detection pressure P of the pressure transmitter can be obtained as follows:
P＝-ρg(h 1 +h 2 -h+h)＝-ρg(h 1 +h 2 )
in the formula, h 2 The constant is determined by the installation height of the transmitter from the ground, and the change of rho and g is not large and can be regarded as constant.
At the same time according to h 2 Calculating the pressure value P= -pgh of the pressure transmitter corresponding to the full water level of the water tank 2 Zero water level pressure value p= -pgg (h+h) 2 ) And respectively setting two pressure values corresponding to the output signal k of the transmitter 1 mA＝4mA、k 2 ma=20ma, so that the transmitter can reflect the water level of the water tank by detecting the pressure, and k is added again 1 mA-k 2 The mA signal corresponds to the zero water level and full water level range of the water tank and is converted to obtain the actual water level value of the underground water tank.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The liquid level measuring device provided by the utility model realizes accurate liquid level measurement in a high-temperature sewage environment, and the operation in the water filling process is simple and convenient, so that the accuracy of the detection of the transmitter is effectively ensured.
(2) When the water is repeatedly filled, the original water outlet pump is utilized, so that the equipment investment can be reduced, the cost is low, and the maintenance amount is small.
(3) The water seal assembly seals the water outlet pipe, so that the transmitter pressure guiding pipe can be ensured to be successfully irrigated, and the water outlet pump can be prevented from idling and being damaged.
Drawings
FIG. 1 is a schematic diagram of a liquid level measuring device of an underground high-temperature sewage collection tank in embodiment 1;
FIG. 2 is a schematic view showing the state of use of the high-temperature sewage underground collection tank of example 1 when the liquid level measuring device is replenished with water;
fig. 3 is a schematic diagram showing the state of use of the high-temperature sewage underground collection tank of the embodiment 1 when the liquid level measuring device is used for filling water.
Reference numerals:
1-a water outlet pump; 2-an underground water tank; 21-a water outlet pipe; 31-a pressure guiding pipe; a 32-negative pressure transducer; 33-a water filling pipe; 34-a first valve; 4-an electromagnetic flowmeter; 51-a water supplementing pipe; 52-a second valve; 53-bottomless valve tank; 54-third valve.
Detailed Description
The utility model will be described in further detail below with reference to the drawings by means of specific embodiments.
Example 1
As shown in fig. 1, the present embodiment provides a liquid level measuring device of a high-temperature sewage underground collection water tank, including: the water outlet pump 1, the negative pressure transmitter 32 and the water seal assembly, wherein the water outlet pump 1 is a water outlet pump of the original underground water tank 2 and is connected with the underground water tank 2 through the water outlet pipe 21. The negative pressure transmitter 32 is arranged on the ground, the bottom end of the negative pressure transmitter extends into the bottom of the underground water tank 2 through the pressure guiding pipe 31, and the top end of the negative pressure transmitter is connected with the water outlet pump 1 through the water filling pipe 33. The water seal assembly is arranged on the water outlet pipe 21 and is used for sealing the water outlet pipe 21 when the pressure guiding pipe is used for filling water, so that the water can be normally fed after the water outlet pump 1 is started, and the negative pressure transmitter 32 is filled.
When the pressure guiding pipe 31 is used for filling water, the water outlet pump 1 is started, water at the bottom of the underground water tank 2 is led into the negative pressure transmitter 32 from the pressure guiding pipe 31, after the water filling is finished, water in the pressure guiding pipe 31 inevitably generates acting force flowing towards the underground water tank 2 according to a siphon principle, the negative pressure transmitter 32 bears negative pressure of the water column of the pressure guiding pipe 31, the negative pressure value changes along with the change of the liquid level of the underground water tank 2, when the liquid level rises, the absolute value of the negative pressure is reduced, when the liquid level falls, the absolute value of the negative pressure is increased, and the changes of the two are in linear corresponding relation, so that the liquid level of the water tank can be detected according to the relation.
This liquid level measuring device adopts negative pressure transmitter 32 to carry out liquid level measurement, has effectively avoided the influence of high Wen Wu water to measuring accuracy, simultaneously, adopts original water pump 1 to draw the pipe of pressing to irritate, and easy operation is swift, daily maintenance is convenient.
Further, a first valve 34 and an electromagnetic flowmeter 4 are disposed on the water filling pipe 33, the first valve 34 is used for opening/closing the water filling pipe 33, and when the water filling pipe 31 needs to be refilled, the first valve 34 is opened, otherwise, the first valve 34 is in a closed state. The first valve 34 is preferably a needle valve, since the filling pipe 33 has air before filling. In actual operation, there are two states:
(1) Normal water outlet state: the water outlet pump 1 is opened, the first valve 34 is closed, and the water outlet pump 1 normally pumps out the water in the underground water tank 2 through the water outlet pipe 21.
(2) Irrigation state: the water outlet pump 1 and the first valve 34 are both opened, and under the sealing action of the water seal assembly, the water outlet pump 1 pumps the water in the underground water tank 2 into the pressure guiding pipe 31 through the water filling pipe 33 until the pressure guiding pipe 31 is filled.
Specifically, the water seal assembly includes: the water replenishing pipe 51 and the bottomless valve water tank 53, the water replenishing pipe 51 is externally connected with a water source, the second valve 52 is arranged on the water replenishing pipe, water replenishing to the bottomless valve water tank 53 is started/stopped through the second valve 52, the bottomless valve water tank 53 is positioned between the water filling pipe 33 and the water outlet pipe 21, the water replenishing pipe 51 is communicated with the lower part of the bottomless valve water tank 53, the water outlet pipe 21 is connected with the upper part of the bottomless valve water tank 53, the bottomless valve water tank 53 is filled in a water replenishing mode, water is used for sealing, and therefore no liquid exists in a pipeline between the water filling pipe 33 and the water outlet pump 1 when the pressure guiding pipe 31 is filled, the water outlet pump 1 idles, and the water outlet pump 1 is damaged.
Furthermore, in an environment with higher turbidity, the pipe orifice of the pressure guiding pipe 31 needs to be kept at a certain distance (usually 15-25 cm) from the bottom of the underground water tank 2, so as to avoid blockage caused by excessive silt suction during the water filling operation of the pressure guiding pipe 31, and distortion of liquid level detection. In the actual use process, the sludge at the bottom of the water tank needs to be cleaned regularly, detection abnormality caused by excessive blockage of the pipe orifice of the pressure guiding pipe 31 by the sludge is avoided, and the water filling operation of the pressure guiding pipe 31 after the underground water tank 2 is cleaned is greatly reduced by a water supplementing-water pump water filling mode, so that the accuracy of liquid level measurement of the negative pressure transmitter 32 is ensured.
Specifically, the irrigation operation process is as follows:
when the pressure guiding pipe 31 is filled with water, the water tank 53 without the bottom valve needs to be ensured to be full of water, if the water tank is not full of water, the second valve 52 is opened to supplement water, and whether the water in the underground water tank 2 turns or not can be observed specifically. When water is replenished, the second valve 52 is opened firstly, water is replenished into the bottomless valve water tank 53 through the water replenishing pipe 51, after the bottomless valve water tank 53 is replenished with water, the water outlet pump 1 is started manually, after the water outlet pump 1 normally discharges water, the first valve 34 on the water filling pipe 33 is opened, and when the electromagnetic flowmeter 4 detects that the flow exists, the first valve 34 is closed, so that water filling is completed.
The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.
Claims (6)
1. The utility model provides a liquid level measurement device of high temperature sewage underground collection water tank which characterized in that includes:
the negative pressure transmitter (32) is arranged on the ground, the bottom of the negative pressure transmitter is communicated with the bottom of the underground water tank (2) through a pressure guiding pipe (31), and the top of the negative pressure transmitter is connected with a water outlet pump (1) of the underground water tank (2) through a water filling pipe (33); when the pressure guiding pipe (31) is used for filling water, water at the bottom of the underground water tank (2) is guided to the negative pressure transmitter (32) from the pressure guiding pipe (31);
the first valve (34) is arranged on the irrigation pipe (33), and when the water outlet pump (1) and the first valve (34) are opened, the pressure guiding pipe (31) is irrigated; when the water outlet pump (1) is opened and the first valve (34) is closed, the water outlet pipe (21) normally outputs water;
the water seal assembly is arranged on the water outlet pipe (21), is connected with the water pump inlet pipeline and is used for supplementing water to the water outlet water pump (1) when the pressure guiding pipe (31) is used for filling water, so that the water outlet water pump (1) can be ensured to normally feed water after being started.
2. The apparatus for measuring the level of a high temperature sewage underground collection tank according to claim 1, wherein the water seal assembly comprises:
the water supplementing pipe (51) is arranged between the water filling pipe (33) and the water outlet pump (1), a second valve (52) is arranged on the water supplementing pipe, and the second valve (52) is used for starting/stopping water supplementing;
a bottom valve-free water tank (53) arranged between the water filling pipe (33) and the water outlet pipe (21), and a third valve (54) arranged at the top of the bottom valve-free water tank for opening/stopping exhaust;
before the water filling operation, water is filled into the bottomless valve water tank (53) through the water filling pipe (51) so as to ensure that the water outlet pump (1) is normally filled with water during the water filling.
3. The device for measuring the liquid level of the high-temperature sewage underground collection water tank according to claim 2, wherein the water supplementing pipe (51) is connected with the lower part of the bottomless valve water tank (53), and the water outlet pipe (21) is connected with the upper part of the bottomless valve water tank (53).
4. The device for measuring the liquid level of the high-temperature sewage underground collection water tank according to claim 1, wherein the water filling pipe (33) is provided with an electromagnetic flowmeter (4), and when the electromagnetic flowmeter (4) detects that the flow rate exists, the pressure guiding pipe (31) is filled with water.
5. The liquid level measuring device of the high-temperature sewage underground collection water tank according to claim 1, wherein the pressure guiding pipe (31) is 15 cm to 25cm away from the bottom of the underground water tank (2).
6. The high temperature sewage underground collection tank level measurement device of claim 2, wherein the first valve (34) is a needle valve, and the second valve (52) and the third valve (54) are ball valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320670194.0U CN219914570U (en) | 2023-03-28 | 2023-03-28 | Liquid level measuring device of high-temperature sewage underground collection water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320670194.0U CN219914570U (en) | 2023-03-28 | 2023-03-28 | Liquid level measuring device of high-temperature sewage underground collection water tank |
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| Publication Number | Publication Date |
|---|---|
| CN219914570U true CN219914570U (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320670194.0U Active CN219914570U (en) | 2023-03-28 | 2023-03-28 | Liquid level measuring device of high-temperature sewage underground collection water tank |
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| Country | Link |
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| CN (1) | CN219914570U (en) |
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2023
- 2023-03-28 CN CN202320670194.0U patent/CN219914570U/en active Active
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