CN210893290U - Device for automatically removing dead blockage of positive displacement flowmeter - Google Patents
Device for automatically removing dead blockage of positive displacement flowmeter Download PDFInfo
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- CN210893290U CN210893290U CN201921789500.2U CN201921789500U CN210893290U CN 210893290 U CN210893290 U CN 210893290U CN 201921789500 U CN201921789500 U CN 201921789500U CN 210893290 U CN210893290 U CN 210893290U
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Abstract
The utility model discloses an automatic get rid of dead device of positive displacement flowmeter card, include: the system comprises two three-way valves with actuators, a reversing controller and two pressure transmitters; the common channels of the two three-way valves are respectively connected with two ends of the flowmeter, and pressure transmitters are arranged between the common channels of the three-way valves and the flowmeter; the pressure transmitter and the actuator are electrically connected with the reversing controller; two medium reversing ends of each three-way valve are respectively connected with a medium input port and a medium output port. The utility model provides an automatic get rid of dead device of positive displacement flowmeter card can judge automatically whether the flowmeter blocks and dies, is blocking the back of dying, can switch the medium direction that flows in the flowmeter, utilizes the pressure differential of medium, promotes the flowmeter reversal, gets rid of the dead trouble of card and continues normal measurement, reduces the flowmeter maintenance and maintains the frequency greatly, reduces use cost, makes it normally to work in the defeated field of crude oil collection.
Description
Technical Field
The utility model relates to a flowmeter application technical field, more specifically the device that relates to an automatic get rid of volumetric flowmeter card is dead that says so.
Background
The positive displacement flowmeter is a flow metering instrument with high precision, small pressure loss, long service life and convenient installation and use, and is widely applied to the field of accurate metering of clean fluid. For a long time, engineers have wanted to convert rotary positive displacement meters, such as: a waist wheel flowmeter, a scraper type flowmeter or a dual-rotor flowmeter is used in the field of crude oil gathering and transportation, but because crude oil contains a large amount of fine silt with different particle sizes and different forms, the rotors of the precision flowmeters cannot be filtered, the rotors of the precision flowmeters are blocked and shut down, the volumetric flowmeter is complex in structure, certain special skills are needed for field maintenance, and time is consumed, so that the application of the volumetric flowmeter in the field is seriously influenced.
Therefore, how to automatically eliminate the card death when the card death occurs is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an automatic get rid of dead device of positive displacement flowmeter card can judge automatically whether the flowmeter card is dead to can get rid of the card automatically and die.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an apparatus for automatically eliminating volumetric flow meter seizing, comprising: the system comprises two three-way valves with actuators, a reversing controller and two pressure transmitters;
the common channels of the two three-way valves are respectively connected with two ends of the flowmeter, and the pressure transmitters are arranged between the common channels of the three-way valves and the flowmeter; the pressure transmitter and the actuator are both electrically connected with the reversing controller;
and two medium reversing ends of each three-way valve are respectively connected with a medium input port and a medium output port.
Preferably, the common passage of each of the three-way valves is connected to the flow meter through a connecting pipe and a flow meter connecting terminal. The connecting terminal facilitates mounting and dismounting of the flowmeter.
The three-way valve is provided with an actuator controlled by a reversing controller and can automatically reverse.
Preferably, the three-way valve is a two-way three-way reversing valve, i.e. the three-way valve can ensure that the inlet channel (common channel) is communicated with one of the outlet channels, and the medium flow direction is not limited, so that the medium can flow into the inlet channel (common channel) from the inlet channel (common channel) or the outlet channel from the outlet channel.
Preferably, the two pressure transmitters are respectively used for measuring the medium pressure at two ends of the flowmeter and transmitting the medium pressure to the reversing controller.
Preferably, the reversing controller senses whether the flowmeter is stuck based on whether a medium pressure difference value at two ends of the flowmeter exceeds a set value, and if the flowmeter is stuck, the reversing controller sends a reversing signal to the actuator to switch the medium flow direction of the flowmeter.
Preferably, the reversing controller is a separate device or the reversing controller and the flow meter are integrated. Namely, the reversing controller can be used as a functional component independently, and can also be integrated with the metering function of the flow meter, namely, the flow meter is provided with the reversing controller. In practical implementation, the integrated flowmeter can be adopted, or a mode that the reversing controller and the flowmeter are separated can be adopted, and the flowmeter can be specifically selected according to conditions.
According to the technical scheme, compare with prior art, the utility model provides an automatic get rid of dead device of positive displacement flowmeter card can judge automatically whether the flowmeter card is dead, and after being died, can switch the direction that the medium flowed into the flowmeter through the three-way valve, through the switching-over pressure differential promotion of medium, get rid of the dead trouble of card automatically, and its metering error that leads to also can be ignored, thereby reduce flowmeter maintenance frequency and fault shut-down probability greatly, use cost is reduced, thereby make the positive displacement flowmeter obtain using in the defeated field of crude oil collection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an apparatus for automatically removing a dead jam of a positive displacement flowmeter according to the present invention;
fig. 2 is a schematic structural diagram of another apparatus for automatically removing the dead lock of the positive displacement flowmeter according to the present invention;
fig. 3 is a schematic view of the medium flow direction provided by the present invention.
Reference numerals:
1. a connection terminal; 2. a three-way valve; 3. an actuator; 4. a pressure transmitter; 5. a commutation controller; 6. and connecting the pipelines.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses dead device of automatic identification and getting rid of positive displacement flowmeter card is proposed to the dead phenomenon of the easy card of rotatory positive displacement flowmeter, specifically as follows:
referring to the attached figure 1, the embodiment of the utility model discloses an automatic get rid of dead device of positive displacement flowmeter card, include: two three-way valves 2 with actuators 3, a reversing controller 5 and two pressure transmitters 4;
the common channels of the two three-way valves 2 are respectively connected with two ends of the flowmeter, and pressure transmitters 4 are arranged between the common channels of the three-way valves 2 and the flowmeter; the pressure transmitter 4 and the actuator 3 are both electrically connected with the reversing controller 5;
two medium reversing ends of each three-way valve 2 are respectively connected with a medium input port and a medium output port.
Preferably, the common channel of each three-way valve 2 is connected to the flow meter via a connecting line 6 and a flow meter connecting terminal 1.
As shown in fig. 1, the connection terminal 1 is used to facilitate mounting and dismounting of the flowmeter, and is preferably, but not limited to, a flange connection, as long as it is mated with the flowmeter connection terminal.
The three-way valve 2 has A, B two, preferably but not limited to three-way ball valve type reversing valves, each three-way valve has a, b and c channels, wherein a is an inlet channel, namely a common channel, and is provided with an on-off type actuator 3. The actuator 3 can communicate a with b or a with c, and the channel a is connected with the flow meter connecting terminal 1, the channels b and c are connected with the inlet of the conveying medium, and the other channel is connected with the outlet of the conveying medium. The actuator 3 is preferably but not limited to an electric actuator, and the actuator 3 rotates forwards or backwards by 90 degrees, so that the communication between the channel a and the channel b of the three-way valve 2 can be switched to the communication between the channel a and the channel c, or vice versa. The pressure transmitters 4 are respectively arranged on the connecting pipelines of the two ports of the flowmeter and used for testing the medium pressure of the two ports.
When the reversing controller 5 is electrified to work, the valve A in the three-way valve 2 can be communicated with a medium inlet of the device, the valve B is communicated with a medium outlet, and the flowmeter rotates in the positive direction for metering, so that the conveying is most energy-saving due to the fact that the pipeline is short and the number of passing elbows is small; when the flowmeter is clamped in the forward direction, the differential pressure value of the two pressure transmitters 4 rises and continuously exceeds a set value, the reversing controller 5 judges that the flowmeter is clamped in the forward direction, so that the control actuator 3 is switched into the state that the valve B is communicated with the medium inlet of the device, the valve A is communicated with the medium outlet of the device, the flowmeter rotates in the reverse direction under the pushing of differential pressure, the clamped position of sand grains and the rotor is separated, the flowmeter continues to measure, and the differential pressure is recovered to be normal; similarly, when the flowmeter is blocked reversely, the forward rotation metering is switched to.
In addition, referring to fig. 2, the embodiment of the present invention also discloses another device for automatically removing the dead lock of the positive displacement flowmeter, and the difference between this embodiment and the device provided by the previous embodiment is only that the aforementioned reversing controller 5 is no longer used as a single functional component, but the function thereof is integrated with the metering function of the flowmeter, so that the flowmeter determines the dead lock by itself, and controls the three-way valve 2 to reverse to remove the dead lock. This is a preferred embodiment, which can reduce costs and optimize the device, but only requires secondary development of the flow totalizer.
Furthermore, the embodiment of the utility model provides a still disclose an automatic get rid of dead method of positive displacement flowmeter card, include:
s1, when the device starts to work, the reversing controller controls a three-way valve close to a conveying medium inlet to be communicated with a medium inlet pipeline in a default mode, a three-way valve close to a conveying medium outlet to be communicated with a medium outlet pipeline, the flow meter rotates in the forward direction for metering, the device is in the most energy-saving conveying state, meanwhile, the reversing controller judges whether the pressure difference between the inlet and the outlet of the flow meter, measured by the pressure transmitter, is smaller than a set value or not, if the pressure difference between the inlet and the outlet is larger than the set value, the time is delayed for several seconds, if the condition is still met, the flow meter is judged;
in a specific implementation, the time of the delay wait may be determined according to a specific experiment, for example: and may be 30 seconds.
S2: the reversing controller controls a three-way valve close to a conveying medium inlet to be communicated with a medium outlet pipeline, the three-way valve close to the conveying medium outlet is communicated with the medium inlet pipeline, the flowmeter rotates reversely to measure, meanwhile, the reversing controller judges whether the pressure difference between the inlet and the outlet of the flowmeter measured by the pressure transmitter is smaller than a set value or not, if the pressure difference is larger than the set value, the time delay is waited for a plurality of seconds, if the condition is still, the flowmeter is judged to be blocked reversely, the step S1 is carried out, a period of time is delayed for waiting for whether the pressure difference is normal or not, if the pressure difference is abnormal, the forward direction is;
in a specific implementation, the time of the delay wait may be determined according to a specific experiment, for example: and may be 30 seconds.
And S3, the reversing controller stops reversing, gives out a fault alarm, continuously monitors the pressure difference between the inlet and the outlet of the flowmeter, and if the pressure difference is recovered to be normal, the fault alarm is eliminated.
The term "normal recovery" as used herein means that the pressure difference is within a set value range, such as: when the fault is processed, the transfusion is stopped in front, or after the time is longer than the delay time, the flow meter slowly and successfully removes the blockage.
The method for automatically removing the dead lock of the positive displacement flowmeter provided by the present invention is described below with reference to fig. 3, specifically as follows:
1. when the reversing controller normally starts to work, the reversing controller controls the three-way valve A to be communicated with the medium inlet pipeline in a default mode, namely, the channel a is communicated with the channel B, the three-way valve B is communicated with the medium outlet pipeline, namely, the channel a is communicated with the channel B, the medium flows to the medium inlet → the three-way valve A (B → a) → flow meter → the three-way valve B (a → B) → medium outlet, as shown by a solid arrow in FIG. 2, the flow meter rotates in the forward direction for metering, and meanwhile, the reversing controller monitors that the differential pressure between the pressure transmitter P1 and the pressure transmitter P2 is smaller than a set value (for example, 200 KP.
2. When the flowmeter is jammed in the forward direction, the differential pressure between the pressure transmitter P1 and the pressure transmitter P2 exceeds a set value, the reversing controller controls the three-way valve B to be communicated with the medium inlet pipeline, namely the channel c is communicated with the channel a, the three-way valve A is communicated with the medium outlet pipeline, namely the channel a is communicated with the channel c, the medium flows to the medium inlet → the three-way valve B (c → a) → flowmeter → the three-way valve A (a → c) → medium outlet, and the flowmeter reversely rotates for metering as shown by a dotted arrow in FIG. 2.
3. When the reverse metering is blocked, the pressure difference between the pressure transmitter P2 and the pressure transmitter P1 exceeds a set value, and in this situation, the reversing controller judges that the flowmeter is blocked reversely, and then the reverse metering is converted into the forward metering in the step 1, and the steps are repeated.
Furthermore, it should be noted that the device for eliminating the dead lock of the positive displacement flowmeter provided by the present invention is suitable for the positive displacement flowmeter allowing the forward and reverse rotation and continuous metering, for example: intelligent roots flowmeter, intelligent scraper flowmeter and intelligent birotor flowmeter.
The utility model provides a get rid of dead device of positive displacement flowmeter card can judge automatically whether the flowmeter blocks and dies, and is being blocked the back of dying, can switch the medium direction that flows into the flowmeter, utilizes the pressure differential of medium, promotes the flowmeter reversal, gets rid of the dead trouble of card and continues normal measurement, reduces the flowmeter maintenance greatly and maintains the frequency, has reduced use cost, makes it normally to work in the defeated field of crude oil collection.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An automatic get rid of dead device of volumetric flowmeter card, its characterized in that includes: the system comprises two three-way valves with actuators, a reversing controller and two pressure transmitters;
the common channels of the two three-way valves are respectively connected with two ends of the flowmeter, and the pressure transmitters are arranged between the common channels of the three-way valves and the flowmeter; the pressure transmitter and the actuator are both electrically connected with the reversing controller;
and two medium reversing ends of each three-way valve are respectively connected with a medium input port and a medium output port.
2. An apparatus for automatically eliminating volumetric flow meter seizing according to claim 1, wherein the common passage of each of said three-way valves is connected to said flow meter by a connecting conduit and a flow meter connecting terminal.
3. The apparatus of claim 1, wherein the three-way valve is a two-way three-way reversing valve.
4. The apparatus of claim 1, wherein the diverter controller is a separate device or the diverter controller and the flow meter are an integrated device.
5. The device for automatically eliminating the dead lock of the volumetric flowmeter as claimed in any one of claims 1-4, wherein two pressure transmitters are respectively used for measuring the medium pressure at two ends of the flowmeter and transmitting the medium pressure to the reversing controller.
6. The device for automatically eliminating the dead lock of the volumetric flowmeter according to claim 5, wherein the reversing controller senses whether the flowmeter is dead based on whether a pressure difference value of media at two ends of the flowmeter exceeds a set value, and if the flowmeter is dead, a reversing signal is sent to the actuator to switch the flow direction of the media of the flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921789500.2U CN210893290U (en) | 2019-10-23 | 2019-10-23 | Device for automatically removing dead blockage of positive displacement flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921789500.2U CN210893290U (en) | 2019-10-23 | 2019-10-23 | Device for automatically removing dead blockage of positive displacement flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210893290U true CN210893290U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921789500.2U Active CN210893290U (en) | 2019-10-23 | 2019-10-23 | Device for automatically removing dead blockage of positive displacement flowmeter |
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| Country | Link |
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| CN (1) | CN210893290U (en) |
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- 2019-10-23 CN CN201921789500.2U patent/CN210893290U/en active Active
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