CN115637944A - Flow measuring device - Google Patents

Abstract

The invention belongs to the technical field of drilling and discloses a flow measuring device which comprises a liquid discharge pipe, a measuring tank, a first electromagnetic valve and a measuring assembly. According to the flow measuring device provided by the invention, the slurry in the liquid discharge pipe flows into the measuring tank through the liquid inlet, when the first electromagnetic valve is closed, the height of the slurry in the measuring tank rises, the measuring component measures the height of the slurry in the measuring tank, and the flow of the slurry in the liquid discharge pipe is calculated according to the change of the measured height along with time.

Description

A flow measuring device

technical field

The invention relates to the technical field of drilling, in particular to a flow measuring device.

Background technique

At present, domestic monitoring of complex drilling conditions such as overflows and well kicks is generally done manually using drilling parameter meters and comprehensive logging tools to regularly observe and record, and then judge whether there are accidents such as overflows or lost circulation. This judgment method has a low degree of automation, a large error, and a long delay in judgment. The other method uses ultrasonic or infrared liquid level sensors installed on the elevated tank to measure the height change, and then calculates a relative change. The absolute value cannot be calculated, and the ultrasonic wave will be affected by vibration on site, and the infrared light will be affected by light. and other influences, resulting in the calculated value may not be accurate.

In some existing technical materials, in order to accurately measure the mud flow at the drilling outlet, the electromagnetic flowmeter is selected as the means. However, in the actual application process, because the measurement principle of the electromagnetic flowmeter requires that the liquid passing through the pipe must be in a state of full pipe. Accurate measurement, but in the real situation, the mud is full of sand, and the mud at the drilling outlet will not always keep the full pipe, resulting in deviations in the measurement of the electromagnetic flowmeter. In addition, when the mud flow rate is large, the electromagnetic flowmeter under the fixed pipe diameter will inhibit the passage of the fluid, thereby causing the backflow of the mud. Since the electromagnetic flowmeter has strict requirements on the actual outlet flow and pressure, it is not suitable for actual on-site use.

Contents of the invention

The purpose of the present invention is to provide a flow measuring device, which can accurately measure the mud flow at the drilling outlet in the real environment of the drilling site.

For reaching this purpose, the present invention adopts following technical scheme:

A flow measuring device comprising:

drain pipe;

A measuring tank, the measuring tank is provided with a liquid inlet and a liquid outlet, the liquid inlet is connected to the discharge pipe, and the liquid outlet is provided with a first electromagnetic valve;

The measuring component is arranged in the measuring tank and is used for measuring the mud height in the measuring tank.

Optionally, the measurement components include:

a sliding resistor, the sliding resistor is arranged in the measuring tank, and the sliding resistor extends along the vertical direction;

Floating rod, the floating rod is arranged in the measuring tank, the floating rod extends along the vertical direction and can move along the vertical direction, the first end of the floating rod is provided with a contactor, the contactor is electrically connected with the sliding resistor, when the floating rod moves along the When moving vertically, the contactor slides on the sliding resistor;

The detector is arranged in the measuring tank, the detector is respectively electrically connected with the sliding resistor and the contactor, and the detector can detect the resistance information between the sliding resistor and the contactor.

Optionally, the measuring tank is provided with an upper tank cavity and a lower tank cavity in sequence from top to bottom in the vertical direction, the sliding resistor and the detector are all arranged in the upper tank cavity, the floating rod is arranged in the lower tank cavity and The first end of the floating rod is pierced through the cavity of the upper tank to connect with the contactor, and the liquid inlet and outlet are both connected to the cavity of the lower tank.

Optionally, the measurement component further includes a processor, the processor is electrically connected to the detector, and the processor can receive the resistance information detected by the detector between the sliding resistor and the contactor and calculate the liquid height in the measurement tank according to the resistance information and mud flow in the discharge pipe.

Optionally, the measurement assembly further includes a filter tube disposed in the measurement tank, the filter tube is provided with a plurality of filter holes, the filter tube extends vertically, and a floating rod is arranged in the filter tube.

Optionally, a floating ball is arranged at the second end of the floating rod, and the floating ball is arranged in the filter tube.

Optionally, the shape of the bottom of the measuring tank is conical, and the liquid outlet is opened on the conical end of the bottom of the measuring tank.

Optionally, it also includes a liquid inlet pipe, the liquid discharge pipe is provided with a first connection port, the first end of the liquid inlet pipe is connected with the first connection port, the second end of the liquid inlet pipe is connected with the liquid inlet port, and the liquid inlet pipe is connected with the first connection port. The tube is provided with a second solenoid valve.

Optionally, a third solenoid valve is also included, and the third solenoid valve is arranged on the discharge pipe.

Optionally, it also includes a safety pipe, the discharge pipe is provided with a second connection port and a third connection port, the first connection port is provided between the second connection port and the third connection port, and the third electromagnetic valve is provided at the third connection port. Between the first connection port and the third connection port, the first end of the safety pipe communicates with the second connection port, the second end of the safety pipe communicates with the third connection port, and the safety pipe is provided with a fourth solenoid valve.

Beneficial effect:

In the flow measuring device provided by the present invention, the mud in the discharge pipe flows into the measuring tank through the liquid inlet, when the first electromagnetic valve is closed, the height of the mud in the measuring tank rises, and the measuring component measures the height of the mud in the measuring tank, according to The measured height changes with time to calculate the flow rate of mud in the discharge pipe. When the height of the mud measured by the liquid measuring component in the measuring tank reaches a certain value, the first electromagnetic valve is opened to discharge the mud out of the measuring tank through the liquid outlet. The flow measuring device can accurately measure the mud flow at the drilling outlet in the real environment of the drilling site.

Description of drawings

Fig. 1 is the installation connection schematic diagram of the flow measuring device provided by the present invention;

Fig. 2 is a schematic diagram of the internal structure of the measuring tank provided by the present invention;

Fig. 3 is a schematic diagram of the working process of the measuring tank provided by the present invention;

Fig. 4 is the flow chart of the measuring method in the measuring process of the flow measuring device provided by the present invention;

Fig. 5 is a working flow diagram of the flow measurement device provided by the present invention.

In the picture:

100. Drain pipe; 110. First connection port; 120. Third solenoid valve; 130. Second connection port; 140. Third connection port;

200, measuring tank; 210, upper tank cavity; 220, lower tank cavity; 221, liquid inlet; 222, liquid outlet; 230, partition;

300, the liquid outlet pipe; 310, the first electromagnetic valve;

410, sliding resistor; 420, floating rod; 430, contactor; 440, detector; 450, processor; 460, filter tube; 470, floating ball; 480, first wire; 490, second wire;

500, liquid inlet pipe; 510, second electromagnetic valve;

600, safety pipe; 610, the fourth solenoid valve;

700, mud pool; 800, wellhead.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

Embodiment one

Referring to Fig. 1, the present embodiment provides a flow measuring device, including a discharge pipe 100, a measuring tank 200, a first solenoid valve 310 and a measuring assembly, and the measuring tank 200 is provided with a liquid inlet 221 and a liquid outlet 222 , the liquid inlet 221 communicates with the liquid discharge pipe 100 , the liquid outlet 222 is provided with a first solenoid valve 310 , and the measuring assembly is arranged in the measuring tank 200 for measuring the mud height in the measuring tank 200 .

In this embodiment, the mud in the discharge pipe 100 flows into the measuring tank 200 through the liquid inlet 221. When the first electromagnetic valve 310 is closed, the height of the mud in the measuring tank 200 rises, and the measuring assembly measures the mud in the measuring tank 200. The height in the discharge pipe 100 is calculated according to the change of the measured height with time. When the height of the mud measured by the liquid measuring component in the measuring tank 200 reaches a certain value, the first solenoid valve 310 is opened to discharge the mud out of the measuring tank 200 through the liquid outlet 222 . The flow measuring device can accurately measure the mud flow at the drilling outlet in the real environment of the drilling site.

In this embodiment, the flow measuring device also includes a mud pool 700, the first end of the drain pipe 100 communicates with the mud discharge pipe at the wellhead 800, and the mud in the drilling well flows into the drain pipe 100 through the mud discharge pipe, and is discharged The second end of the liquid pipe 100 communicates with the mud pool 700 , and the mud in the drilling well flows into the mud pool 700 through the mud discharge pipe flow and the liquid discharge pipe 100 in sequence.

Further, the liquid outlet 222 communicates with the mud pool 700 , and when the first solenoid valve 310 is opened, the mud in the measuring tank 200 flows into the mud pool 700 through the liquid outlet 222 .

Further, the flow measuring device further includes a liquid outlet pipe 300 , the first end of the liquid outlet pipe 300 communicates with the liquid outlet 222 , and the second end of the liquid outlet pipe 300 communicates with the mud pool 700 . Specifically, the first end of the liquid outlet pipe 300 can be connected to the liquid outlet 222 by welding, and the connection between the first end of the liquid outlet pipe 300 and the liquid outlet 222 can also be in other forms, which will not be repeated here. Let’s go into details; the second end of the liquid outlet pipe 300 can be connected to the mud pool 700 by welding, and the second end of the liquid outlet pipe 300 can be connected to the mud pool 700 in other forms, which will not be done here. Go into details. Further, the first solenoid valve 310 is disposed on the liquid outlet pipe 300 .

Further, the flow measurement device also includes a liquid inlet pipe 500, the liquid discharge pipe 100 is provided with a first connection port 110, the first end of the liquid inlet pipe 500 communicates with the first connection port 110, the second end of the liquid inlet pipe 500 The end communicates with the liquid inlet 221 , and the second solenoid valve 510 is arranged on the liquid inlet pipe 500 . Specifically, the first end of the liquid inlet pipe 500 can be connected to the first connection port 110 by welding, and the connection method between the first end of the liquid inlet pipe 500 and the first connection port 110 can also be in other forms, here No more details; the second end of the liquid inlet pipe 500 can be connected to the liquid inlet 221 by welding, and the connection between the second end of the liquid inlet pipe 500 and the liquid inlet 221 can also be in other forms. This will not be described in detail. In this embodiment, the discharge pipe 100 communicates with the measuring tank 200 through the liquid inlet pipe 500 . When the flow of mud in the discharge pipe 100 needs to be detected, the first solenoid valve 310 is closed and the second solenoid valve 510 is opened.

The flow measuring device further includes a third solenoid valve 120 , and the third solenoid valve 120 is arranged on the discharge pipe 100 . Specifically, the third solenoid valve 120 is disposed between the first connection port 110 and the mud pool 700 . In this embodiment, when the flow of mud in the discharge pipe 100 needs to be detected, the first solenoid valve 310 and the third solenoid valve 120 are closed, and the second solenoid valve 510 is opened.

Further, the flow measuring device further includes a safety pipe 600, the discharge pipe 100 is provided with a second connection port 130 and a third connection port 140, and the first connection port 110 is provided between the second connection port 130 and the third connection port 140 Between, the third electromagnetic valve 120 is arranged between the first connection port 110 and the third connection port 140, the first end of the safety pipe 600 communicates with the second connection port 130, and the second end of the safety pipe 600 connects with the third connection port. The port 140 is connected, and the safety pipe 600 is provided with a fourth solenoid valve 610 . Specifically, the second connection port 130 and the third connection port 140 are sequentially arranged along the direction from the first end to the second end of the discharge pipe 100, and the first end of the safety pipe 600 can be connected to the second connection port 130 by welding. The connection between the first end of the safety tube 600 and the second connection port 130 can also be in other forms, which will not be described in detail here; the second end of the safety tube 600 can be connected to the third connection port 140 by welding. Connection, the connection between the second end of the safety tube 600 and the third connection port 140 may also be in other forms, which will not be described in detail here. In this embodiment, when the first solenoid valve 310 , the second solenoid valve 510 or the third solenoid valve 120 fails to open due to failure, the fourth solenoid valve 610 is opened, and the mud in the discharge pipe 100 can flow in through the safety pipe 600 In the mud pool 700, it can effectively prevent accidents from happening.

In this embodiment, with reference to Figures 2 to 3, the measurement assembly includes a sliding resistor 410, a floating rod 420, a contactor 430 and a detector 440, the sliding resistor 410, a floating rod 420, a contactor 430 and a detector 440 are all arranged in the measuring tank 200, the sliding resistor 410 extends in the vertical direction, the floating rod 420 is arranged in the measuring tank 200, the floating rod 420 extends in the vertical direction and can move in the vertical direction, the first floating rod 420 One end is provided with a contactor 430, and the contactor 430 is electrically connected with the sliding resistor 410. When the floating rod 420 moves vertically, the contactor 430 slides on the sliding resistor 410; the detector 440 is connected to the sliding resistor 410 respectively. Electrically connected to the contactor 430 , the detector 440 can detect resistance information between the sliding resistor 410 and the contactor 430 . Specifically, the first end of the floating rod 420 is bent to one side and the contactor 430 is installed, the detector 440 is electrically connected with the contactor 430 through the first wire 480, the bottom of the sliding resistor 410 is provided with a connecting part, and the detector 440 passes through The second wire 490 is electrically connected to the connecting portion of the sliding resistor 410 .

Specifically, the detector 440 sends out a constant current signal, flows out through the first wire 480 , flows into the sliding resistor 410 through the contactor 430 , and flows back to the detector 440 from the second wire 490 connected to the bottom of the sliding resistor 410 . Further, the lateral current electrical signal can be but not limited to any current signal within 1-10 mA, preferably, the lateral electrical signal can be 2 mA, 5 mA or 6 mA. When the floating rod 420 floats up and down with the mud level in the measuring tank 200, the resistance value of the sliding resistor 410 connected to the detector 440 also changes linearly thereupon. According to Ohm's law, the voltage received by the detector 440 can be According to the formula V=I*R, I is a constant current electric signal, and R is the resistance of the sliding resistor 410 connected to the detector 440, so V is proportional to R, and the detector 440 detects the sliding resistor 410 and The resistance information between the contactors 430 is the voltage signal received by the detector 440. The detector 440 judges whether the contactor 430 is in the sliding resistor through the strength of the received voltage signal and according to the calibrated corresponding relationship. 410, the height state of the floating rod 420 is known, and then the height of the mud in the measurement tank 200 is obtained, and the numerical value of the voltage signal received by the detector 440 is proportional to the liquid level height, and then can be obtained by The height of the mud in the measuring tank 200 is calculated, and the cross-sectional area of the measuring tank 200 can be constant, and the mud flow in the discharge pipe 100 can be calculated with timing.

Further, the measurement component also includes a processor 450, the processor 450 is electrically connected to the detector 440, and the processor 450 can receive the resistance information between the sliding resistor 410 and the contactor 430 detected by the detector 440 and calculate according to the resistance information The height of the mud in the tank 200 and the flow of the mud in the discharge pipe 100 are measured. In this embodiment, there are signal amplifiers, filter voltage followers and other electrical components in the detector 440, and the voltage and electrical signals received by the detector 440 are sent to the processor after a series of signal amplification and filtering. 450 , the ADC conversion chip in the processor 450 converts the processed analog quantity into a digital quantity, and accurately calculates the actual height of the mud in the measurement tank 200 through the processor 450 . And the processor 450 can record the voltage and electrical signal transmitted by the detector 440 per unit time, and the cross-sectional area of the measuring tank 200 is constant, so the processor 450 can obtain the mud flow in the discharge pipe 100 through calculation. Further, the unit time may be but not limited to any value within 0.1s-2s. Preferably, the unit time is 0.5s or 1s.

In this embodiment, the second solenoid valve 510 is opened, the first solenoid valve 310, the third solenoid valve 120 and the fourth solenoid valve 610 are closed, and the mud flows into the measuring tank 200 from the liquid inlet pipe 500, and the liquid in the measuring tank 200 is The rise of the mud liquid level drives the floating rod 420 to move upwards, the resistance between the resistor and the contactor 430 becomes larger, and the processor 450 receives the resistance information between the sliding resistor 410 and the contactor 430 detected by the detector 440 and The actual height of the mud in the measurement tank 200 and the flow of mud in the discharge pipe 100 are obtained through processing. Further, the first solenoid valve 310, the second solenoid valve 510, the third solenoid valve 120 and the fourth solenoid valve 610 are all electrically connected to the processor 450, and the processor 450 can control the first solenoid valve 310, the second solenoid valve 510 , the opening and closing of the third electromagnetic valve 120 and the fourth electromagnetic valve 610, when the processor 450 calculates that the mud height in the measuring tank 200 reaches a full tank state, open the first electromagnetic valve 310, and measure the mud level in the tank 200 Descending, driving the floating rod 420 to move downward, the resistance between the resistor and the contactor 430 becomes smaller, until the processor 450 calculates that the mud height in the measuring tank 200 reaches the emptying state, close the first solenoid valve 310, and continue Measurement calculation The mud height in the tank 200 and the mud flow in the discharge pipe 100 are measured. Specifically, the full tank state is that the contactor 430 slides to the highest position of the sliding resistor 410, and the resistance between the resistor and the contactor 430 reaches the maximum value allowed; the empty state is that the contactor 430 slides to the sliding resistor 410. The lowest position of , the resistance between the resistor and the contactor 430 reaches the allowable minimum value.

Further, the measurement assembly further includes a filter tube 460 arranged in the measurement tank 200 , a plurality of filter holes are arranged on the filter tube 460 , the filter tube 460 extends vertically, and a floating rod 420 is arranged in the filter tube 460 . Specifically, multiple groups of filter holes are arranged at intervals along the length direction of the filter tube 460, each group of filter holes is arranged at intervals around the circumference of the filter tube 460, and adjacent groups of filter holes are arranged alternately so that the filter holes are covered with a filter The pipe 460 effectively prevents large particles of mud from entering the filter pipe 460, and then cannot be discharged smoothly, thereby affecting the height of the floating rod 420.

Further, a floating ball 470 is disposed on the second end of the floating rod 420 , and the floating ball 470 is disposed in the filter tube 460 . Specifically, the inner diameter of the filter tube 460 is equal to the diameter of the floating ball 470, and the floating ball 470 can freely float up and down with the rise and fall of the mud liquid level in the measuring tank 200 in the filter tube 460, effectively ensuring that the floating rod 420 moves up and down along the vertical direction. float.

Further, the measuring tank 200 is provided with an upper tank cavity 210 and a lower tank cavity 220 in sequence from top to bottom in the vertical direction, and the sliding resistor 410, the detector 440 and the processor 450 are all arranged in the upper tank cavity 210 , the filter tube 460, the floating ball 470 and the floating rod 420 are all arranged in the lower tank cavity 220, and the first end of the floating rod 420 is connected with the contactor 430 through the upper tank cavity 210, the liquid inlet 221 and the liquid outlet The ports 222 are all in communication with the lower tank cavity 220 . Specifically, the first end of the filter tube 460 abuts against the partition plate 230, a through hole is provided on the partition plate 230 between the upper tank cavity 210 and the lower tank cavity 220, and the floating rod 420 is inserted into the through hole, And it is slidably connected with the through hole. Further, a through hole is disposed at the center of the partition 230 . In this embodiment, the space in the measuring tank 200 is divided into an upper tank cavity 210 and a lower tank cavity 220, and electrical components such as a sliding resistor 410, a detector 440 and a contactor 430 are arranged on the upper tank cavity 210. In this way, the electrical components in the upper tank cavity 210 cannot touch the mud, effectively prevent the electrical components in the upper tank cavity 210 from being damaged, ensure the safe operation of the flow measuring device, and prevent the occurrence of dangerous situations such as electric shock.

Further, the bottom of the lower tank cavity 220 is provided with a support plate, and the second end of the filter tube 460 abuts against the support plate.

Further, the shape of the bottom of the measuring tank 200 is conical, and the liquid outlet 222 is opened on the tapered end of the bottom of the measuring tank 200 . In this embodiment, the liquid outlet 222 is arranged on the tapered end of the bottom of the measuring tank 200, and when the first solenoid valve 310 is opened, it can effectively ensure that the mud in the measuring tank 200 can be discharged smoothly under the action of gravity.

Exemplarily, the flow measurement device adjusts the measurement initial state before use.

Specifically, the contactor 430 is located at the lowest position of the sliding resistor 410, and the floating ball 470 is located at the lowest position in the filter tube 460, that is, the resistance between the resistor and the contactor 430 reaches the allowable minimum value. At this time, the processor 450 Receiving the resistance signal of the detector 440 is identified as an empty tank signal; the contactor 430 is located at the highest position of the sliding resistor 410, and the float 470 is located at the highest position in the filter tube 460, that is, the resistance between the resistor and the contactor 430 reaches At this time, the processor 450 recognizes the resistance signal received by the detector 440 as a full tank signal.

Exemplarily, referring to Fig. 4 to Fig. 5, the measurement method in the measurement process of the flow measurement device specifically includes the following steps:

S100, the processor 450 sends a measurement signal and simultaneously starts the timing function, the processor 450 controls the first solenoid valve 310, the third solenoid valve 120 and the fourth solenoid valve 610 to close, and the second solenoid valve 510 to open.

Specifically, the processor 450 controls the first solenoid valve 310, the third solenoid valve 120, and the fourth solenoid valve 610 to close, and after the second solenoid valve 510 is opened, the mud in the discharge pipe 100 flows into the measuring tank through the liquid inlet pipe 500 200, the mud liquid level in the measuring tank 200 rises, driving the floating ball 470 to move upward in the filter tube 460, the floating ball 470 pushes the floating rod 420 to slide in the center hole of the partition 230, and then drives the contactor 430 to move upward, the contactor The resistance between the contactor 430 and the sliding resistor 410 becomes larger, and when the resistance between the contactor 430 and the sliding resistor 410 becomes larger, the timer in the processor 450 starts timing.

S200, the processor 450 calculates the mud height in the measurement tank 200 and the mud flow in the discharge pipe 100 per unit time.

Specifically, the processor 450 sets the unit time for calculating the flow rate as ΔT. When the contactor 430 rises for a distance of Δh within the time period of ΔT, the mud flow Q in the discharge pipe 100 per unit time is Q=(S×Δh)/ΔT, Wherein S is the cross-sectional area of the lower tank cavity 220 . In this embodiment, the flow measurement device can measure the mud flow in the discharge pipe 100 in real time as the measurement time elapses.

S300. When the processor 450 receives a full tank signal, the processor 450 sends a reset signal and controls the first electromagnetic valve 310 to open, and the processor 450 stops the timing function.

Specifically, when the processor 450 receives the full tank signal, the contactor 430 is located at the highest position of the sliding resistor 410, the floating ball 470 is located at the highest position in the filter tube 460, and the mud in the measuring tank 200 is discharged through the liquid outlet 222 .

S400. When the processor 450 receives an empty tank signal, the processor 450 sends a measurement signal and controls the first solenoid valve 310 to close, and the processor 450 starts the timing function.

Specifically, when the processor 450 receives the empty tank signal, the timer in the processor 450 stops counting, the contactor 430 is located at the lowest position of the sliding resistor 410 , and the float 470 is located at the lowest position in the filter tube 460 .

S500. Repeat steps S200, S300 and S400.

In this embodiment, steps S200 , S300 and S400 are repeated so that the flow measuring device continuously measures the mud flow in the discharge pipe 100 in real time.

Furthermore, when the measurement is stopped or the flow measurement device is ready for maintenance, the processor 450 can be controlled to close the second solenoid valve 510 and open the third solenoid valve 120 to allow the mud to flow into the mud pool 700 through the drain pipe 100 .

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. Various obvious changes, readjustments, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A flow measuring device, comprising:

a drain pipe (100);

the measuring tank (200) is provided with a liquid inlet (221) and a liquid outlet (222), the liquid inlet (221) is communicated with the liquid discharge pipe (100), and the liquid outlet (222) is provided with a first electromagnetic valve (310);

a measurement component disposed within the measurement tank (200) for measuring a height of mud within the measurement tank (200).

2. The flow measuring device of claim 1, wherein the measurement assembly comprises:

a sliding resistor (410), the sliding resistor (410) being disposed within the measurement tank (200), and the sliding resistor (410) extending in a vertical direction;

a floating rod (420), wherein the floating rod (420) is arranged in the measuring tank (200), the floating rod (420) extends along the vertical direction and can move along the vertical direction, a first end of the floating rod (420) is provided with a contactor (430), the contactor (430) is electrically connected with the sliding resistor (410), and when the floating rod (420) moves along the vertical direction, the contactor (430) slides on the sliding resistor (410);

a detector (440), the detector (440) being disposed within the measurement tank (200), the detector (440) being electrically connected with the sliding resistor (410) and the contactor (430), respectively, the detector (440) being capable of detecting resistance information between the sliding resistor (410) and the contactor (430).

3. The flow measuring device according to claim 2, characterized in that the measuring tank (200) is provided with an upper tank cavity (210) and a lower tank cavity (220) in sequence from top to bottom along a vertical direction, the sliding resistor (410) and the detector (440) are both arranged in the upper tank cavity (210), the floating rod (420) is arranged in the lower tank cavity (220) and a first end of the floating rod (420) penetrates through the upper tank cavity (210) to be connected with the contactor (430), and the liquid inlet (221) and the liquid outlet (222) are both communicated with the lower tank cavity (220).

4. The flow measuring device of claim 2, wherein the measurement assembly further comprises a processor (450), the processor (450) being electrically connected to the detector (440), the processor (450) being capable of receiving the resistance information between the sliding resistor (410) and the contactor (430) detected by the detector (440) and calculating the level of liquid in the measurement tank (200) and the slurry flow rate in the drain (100) from the resistance information.

5. The flow measuring device of claim 2, wherein the measuring assembly further comprises a filter tube (460) disposed within the measuring tank (200), the filter tube (460) having a plurality of filter holes disposed thereon, the filter tube (460) extending in a vertical direction, the float rod (420) being disposed within the filter tube (460).

6. The flow measuring device of claim 5, wherein the second end of the float rod (420) is provided with a float ball (470), the float ball (470) being disposed within the filter tube (460).

7. A flow measuring device according to claim 1, characterized in that the bottom of the measuring tank (200) is conical in shape, the outlet opening (222) opening onto the conical end of the bottom of the measuring tank (200).

8. The flow measuring device according to any one of claims 1 to 7, further comprising a liquid inlet pipe (500), wherein a first connection port (110) is disposed on the liquid outlet pipe (100), a first end of the liquid inlet pipe (500) is communicated with the first connection port (110), a second end of the liquid inlet pipe (500) is communicated with the liquid inlet port (221), and a second electromagnetic valve (510) is disposed on the liquid inlet pipe (500).

9. The flow measuring device according to claim 8, characterized by further comprising a third solenoid valve (120), the third solenoid valve (120) being arranged on the drain pipe (100).

10. The flow rate measurement device according to claim 9, further comprising a safety pipe (600), wherein the drain pipe (100) is provided with a second connection port (130) and a third connection port (140), the first connection port (110) is disposed between the second connection port (130) and the third connection port (140), the third electromagnetic valve (120) is disposed between the first connection port (110) and the third connection port (140), a first end of the safety pipe (600) is communicated with the second connection port (130), a second end of the safety pipe (600) is communicated with the third connection port (140), and the safety pipe (600) is provided with a fourth electromagnetic valve (610).

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