CN112252454A - System and method for dredging pipeline and double-wheel slot milling machine - Google Patents
System and method for dredging pipeline and double-wheel slot milling machine Download PDFInfo
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- CN112252454A CN112252454A CN202011241390.3A CN202011241390A CN112252454A CN 112252454 A CN112252454 A CN 112252454A CN 202011241390 A CN202011241390 A CN 202011241390A CN 112252454 A CN112252454 A CN 112252454A
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/10—Wheeled apparatus for emptying sewers or cesspools
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/26—Indicating devices
- E02F9/261—Surveying the work-site to be treated
- E02F9/262—Surveying the work-site to be treated with follow-up actions to control the work tool, e.g. controller
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/26—Indicating devices
- E02F9/267—Diagnosing or detecting failure of vehicles
- E02F9/268—Diagnosing or detecting failure of vehicles with failure correction follow-up actions
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
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Abstract
The application relates to the field of mechanical engineering, in particular to a system and a method for dredging a pipeline and a double-wheel slot milling machine. The application provides a system of mediation pipeline, the first end and the pump of pipeline are connected, and the system includes: the pressure detection device is arranged on the pipeline and used for judging whether the pipeline is blocked or not; the fluid blowing device is connected with the pipeline and used for blowing fluid into the pipeline when the pipeline is blocked; and the first valve is arranged on the pipeline, is positioned on one side, far away from the pump, of the pressure detection device and the fluid blowing device, and is used for closing the pipeline when the pipeline between the pressure detection device and the pump is blocked. The system and the method are convenient and fast, the pipe does not need to be disassembled, the pipeline can be changed as little as possible, the brought additional cost is smaller, the cost efficiency is higher, and the system and the method are particularly suitable for pipelines which are long but have obvious rules in the occurrence probability of the blockage position, such as slurry pipelines of a double-wheel slot milling machine.
Description
Technical Field
The application relates to the field of mechanical engineering, in particular to a system for dredging pipelines, a method for dredging pipelines and a double-wheel slot milling machine.
Background
The double round slot milling machine is the equipment that often uses in the engineering machine tool, carries out the in-process of arranging the sediment with the double round slot milling machine, need carry out long distance pump sending with the pipeline with mud, because the reinforcing bar gets into the slush pump when the size of stone is different and the second phase groove mills, often can lead to arranging the sediment and interrupt. However, the detection of the location of the blockage is difficult due to the long mud line. And at present, no effective dredging method exists, and the machine must be stopped and the pipe must be disassembled when the pipeline is blocked, so that the progress of engineering operation is influenced.
It is therefore important to find a system suitable for use in a two-wheel slot milling machine which is capable of finding the approximate location of a blockage with high efficiency and of unblocking the same.
Disclosure of Invention
In view of the above, the embodiments of the present application are directed to a system for dredging a pipeline, a method for dredging a pipeline, and a dual-wheel slot milling machine.
This application first aspect provides a system of mediation pipeline, and the first end of pipeline links to each other with the pump, and the system includes: the pressure detection device is arranged on the pipeline and used for judging whether the pipeline is blocked or not; the fluid blowing device is connected with the pipeline and used for blowing fluid into the pipeline when the pipeline is blocked; and the first valve is arranged on the pipeline, is positioned on one side, far away from the pump, of the pressure detection device and the fluid blowing device, and is used for closing the pipeline when the pipeline between the pressure detection device and the pump is blocked.
In one example, the pipes include a first pipe at a first end and a second pipe at a second end of the pipes, and the pressure detecting device and the fluid blowing device are disposed on the first pipe.
In one example, the first valve is disposed on the second line.
Optionally, the system further comprises a flow detection device disposed on the pipeline for determining whether the pipeline is blocked.
In one example, the pump, the flow rate detecting means, the pressure detecting means, the fluid blowing means, and the first valve are provided in this order.
In one example, the pump, the pressure detecting means, the flow rate detecting means, the fluid blowing means, and the first valve are provided in this order.
In one example, the fluid blowing device includes: a fluid supply device; a branch line connected between the line and the fluid supply device; and the second threshold door is arranged on the branch pipeline and used for opening the second threshold door when the pipeline between the pressure detection device and the pump is blocked so that the branch pipeline blows fluid to the pipeline.
Optionally, the system further includes a controller connected to the pressure detection device, and configured to receive the pressure detected by the pressure detection device, determine a blocking position of the pipeline based on the pressure, and further control the opening and closing of the first valve.
In one example, the controller is to: when the difference value between the pressure and the normal working pressure of the pipeline is higher than a first threshold value, judging that the pipeline at the far pump side where the pressure detection device is located is blocked; when the difference value between the pressure and the normal working pressure is lower than a second threshold value, judging that the pipeline on the side close to the pump where the pressure detection device is located is blocked, wherein the first threshold value is a positive value, and the second threshold value is a negative value; when the pipeline on the far pump side of the position where the pressure detection device is located is blocked, controlling the pump starting device and/or the fluid blowing device to send fluid into the pipeline in a pulse mode, so that the blockage is flushed away in the direction of the far pump; when a blockage occurs in the pipeline on the side close to the pump at the position of the pressure detection device, the first valve is controlled to be closed, the pump stops running, and the fluid blowing device is controlled to send fluid to the pipeline, so that the blockage is flushed in the direction close to the pump.
In one example, the system is applied to a double-wheel slot milling machine, the pump is a slurry pump, and the pipeline is a pipeline for conveying slurry and comprises a rubber pipe, a steel pipe, a hose and a ground pipeline which are sequentially connected with the pump.
This application second aspect provides a double round slot milling machine, includes: a pump; a pipeline connected with the pump; a system for dredging a pipeline as claimed in the first aspect of the present application.
A third aspect of the present application provides a method of dredging a pipeline, comprising: detecting the pressure at the position of the pump through a pressure detection device arranged in a pipeline connected with the pump; determining that a blockage occurs in the pipe on the far pump side where the pressure detection device is located when the difference between the pressure and the normal working pressure of the pipeline is higher than a first threshold value; when the difference value between the pressure and the normal working pressure is lower than a second threshold value, determining that the pipeline on the side close to the pump where the pressure detection device is located is blocked, wherein the first threshold value is a positive value, and the second threshold value is a negative value; when the pipeline on the far pump side of the position where the pressure detection device is located is blocked, controlling the pump starting device and/or the fluid blowing device to send fluid into the pipeline in a pulse mode, so that the blockage is flushed away in the direction of the far pump; when a blockage occurs in the pipeline on the side close to the pump at the position of the pressure detection device, the first valve arranged on the side, far away from the pump, of the pressure detection device is controlled to be closed, and the fluid blowing device is controlled to send fluid to the pipeline, so that the blockage is flushed in the direction close to the pump.
Based on the embodiment of this application, through set up parts such as pressure measurement device, fluid blowing device, first valve in the pipeline in order, thereby can divide the condition to block up the position and handle, be located the pump (or near the pump section, or the section between pump and the pressure measurement device) or be located the pipeline (or far away the pump section, or the pipeline section that pressure measurement device kept away from the pump) according to blocking up the position, and take different modes to dredge the jam position according to the condition of difference, thereby can make as little as possible change to the pipeline, the additional cost of bringing is littleer, cost-effective rate is higher.
Drawings
Fig. 1 is a schematic structural view of a double-wheel slot milling machine in the prior art.
Figure 2 is a schematic and diagrammatic illustration of a pull through pipe system as applied to a two-wheel slot milling machine according to an exemplary embodiment of the present application.
FIG. 3 is a schematic, diagrammatic illustration of a pull through system provided in accordance with an exemplary embodiment of the present application.
Fig. 4 is a flowchart illustrating a method for unblocking a pipeline according to an exemplary embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The system and the method are particularly suitable for pipelines which are long but have obvious regular occurrence probability of blockage positions, such as slurry pipelines of a double-wheel slot milling machine.
As shown in fig. 1, the top of the mast 130 of the conventional two-wheel slotter is generally provided with a guide wheel set 110 for guiding an oil pipe 111 and a mud pipe 112; the oil pipe 111 and the mud pipe 112 are connected with the internal structure of the tool rest 120; specifically, inside the tool post 120, the oil pipe 111 is connected to an oil steel pipe 121 ', an oil rubber pipe 122 ', and an oil pump 123 ', and the slurry pipe 112 is connected to a slurry steel pipe 121 ", a slurry rubber pipe 122", and a slurry pump 123 "in this order.
The inventor of the application finds that when the double-wheel slot milling machine is blocked, the probability of blockage in the pump is higher relative to a pipeline with a very long distance, namely, if the blockage site can be judged to be in the pump or in the pipeline firstly, the time for searching the blockage site can be effectively saved; further, aiming at two different situations of blockage and pipeline blockage in the pump, the inventor of the application finds different dredging modes which are respectively used, and can effectively dredge the blockage under the situation that the shutdown and the pipe disassembly are not needed. In addition, equipment and operation cost are particularly considered in construction, and the inventor of the application finds that the existing system and method for dredging pipeline blockage are too complex, needs to improve the equipment and the system more, increases more cost, but has limited time for really playing a role, and is not cost-effective in practice; in order to improve the cost efficiency as much as possible and solve the problem of blockage on the premise of improving the blockage condition as little as possible, the inventor of the application proposes the technical scheme of the application.
A system for dredging a pipeline according to an embodiment of the present application is shown in fig. 3, for example.
In one example, the system is applied in a two-wheel slot milling machine, such as shown in fig. 2.
The system for dredging a pipeline of the present application is illustrated in conjunction with fig. 1, 2 and 3.
In the tool rest 120, a pump 123 (including an oil pump 123 ' and a slurry pump 123 "), a rubber pipe 122 (including an oil rubber pipe 122 ' and a slurry rubber pipe 122") and a steel pipe 121 (including an oil steel pipe 121 ' and a slurry steel pipe 121 ") are arranged from bottom to top in sequence; on the outside of the tool post, the steel pipe 121 is connected with a hose (comprising an oil pipe 111 and a mud pipe 112), and after passing through the large guide wheel set at the lower right in the figure 1, the hose is connected with a ground pipeline (not shown in the figure); the ground pipeline is not limited to a portion contacting the ground, but a pipeline (even in the form of a pipe) connecting all hoses is collectively referred to as a ground pipeline.
Since the mud line is prone to plugging, the pump 210 in the system of the present application is illustrated in fig. 1 as a mud pump 123 "in one example, the line for transporting mud includes a rubber tube 122, a steel tube 121, a hose, and a surface line connected to the pump in sequence.
The pressure detecting means 230 is provided on the pipeline for detecting the pressure of the pipeline at the location, and based on the pressure, it is possible to determine whether or not a blockage has occurred in the pipeline, and even the approximate location of the blockage.
In an example applied to a double-wheel slot milling machine, the pressure detecting device 230 may be disposed at the outlet of the pump 123 (referring to the short section of the pipeline at the outlet of the pump), on the rubber tube 122, on the steel tube 121, and at the connecting portion therebetween (in this application, the term "connecting portion" is not limited to the joint where two components are connected, but a portion located above and near the joint may be understood as being located at the connecting portion). Preferably, at least one pressure detecting means 230 is provided at the outlet of the pump 123 or on the rubber tube 122. In view of the highest cost effectiveness, in one example, only one pressure sensing device 230 is provided and located at the outlet of the pump 123 or on the rubber tube 122 near the connection of the pump 123 and the rubber tube 122.
The fluid blowing device 240 is connected to the pipeline for blowing fluid into the pipeline when the pipeline is clogged. The blown fluid is not particularly limited, and may be a fluid capable of applying a sufficient force to allow the plug to be flushed away. For example, the fluid blown may be a gas, a liquid, a mixture of gas and liquid (e.g., liquid entrained bubbles), and the like.
In one example, the fluid blowing device 240 is disposed on a side of the pressure detection device 230 away from the pump. In a further embodiment, the fluid blowing device 240 is closer to the pressure detecting device 230 to shorten the distance of the fluid blowing device 240 from the blocked position when the blocked position occurs between the pressure detecting device 230 and the pump 210.
In one example applied to a double-wheel slot milling machine, the fluid blowing device 240 is provided on the rubber tube 122 and/or the steel tube 121. In a preferred embodiment, at least one fluid blowing device 240 is provided on the rubber tube 122 in consideration of the probability of occurrence of a clogged position in the double-disc slot milling machine. In view of the highest cost effectiveness, in one example, there is only one fluid blowing device 240 disposed on the rubber tube 122.
In one example, the fluid blowing device 240 includes: a fluid supply device (not shown in the figures); a branch line 242 connected between the line and the fluid supply device; and the second threshold door 241 is arranged on the branch pipeline and used for opening the second threshold door 241 when the pipeline between the pressure detection device and the pump is blocked so that the branch pipeline blows fluid to the pipeline.
The first valve 250 is disposed on the pipeline to close the pipeline when the pipeline between the pressure detecting device 230 and the pump 210 is clogged. The first valve 250 is located on the side of the pressure detecting means 230 and the fluid blowing means 240 away from the pump so that the fluid blowing means 240 can function effectively when the first valve 250 is closed.
In one example of use in a two-wheel slot milling machine, the at least one first valve 250 is disposed on a ground line, such as a line disposed in an engine.
In one example, the pump 210, the pressure detecting device 230, the fluid blowing device 240, and the first valve 250 are sequentially disposed in order.
In another example, the pump 210, the fluid blowing device 240, the pressure detecting device 230, and the first valve 250 may also be sequentially disposed in order.
In one example of the application to a two-wheel slot milling machine, the pressure detecting device 230 is disposed at the outlet of the pump or the fluid blowing device 240 on the rubber tube, the fluid blowing device 240 is disposed on the rubber tube on the side of the pressure detecting device 230 away from the pump, and the first valve 250 is disposed on the ground line.
In one example, the pipes include a first pipe at a first end and a second pipe at a second end of the pipes, and the pressure detecting device and the fluid blowing device are disposed on the first pipe.
In one example, the first valve 250 is disposed on the second line.
In one example of application to a two-wheel slot milling machine, the first line includes the pump outlet and rubber tubing 122, and the second line includes steel tubing 121, hose, and surface line.
In another example of application to a two-wheel slot milling machine, the first line includes the pump outlet, rubber tube 122 and steel tube 121, and the second line includes the hose and the surface line.
Optionally, the system further comprises a flow detection device 220 disposed on the line for determining whether the line is blocked. Before the pressure detection device 230 normally acts on the pressure detection device 230, the flow rate detection device 220 determines whether or not a blockage has occurred in the pipe, and the pressure detection device 230 determines the position of the blockage.
The flow sensing device 220 may be placed anywhere on the line, on the first line in one example of use in a two-wheel slot milling machine, and further may be placed at the outlet of the pump.
In one example, the pump 210, the flow rate detecting device 220, the pressure detecting device 230, the fluid blowing device 240, and the first valve 250 are sequentially disposed in order.
In another example, the pump 210, the pressure detecting means 230, the flow rate detecting means 220, the fluid blowing means 240, and the first valve 250 are sequentially disposed in order.
In another example, the pump 210, the flow rate detecting device 220, the fluid blowing device 240, the pressure detecting device 230, and the first valve 250 are sequentially disposed in order.
In one embodiment, the system of the present application is controlled by a controller. In one example, the system further includes a controller (not shown) connected to the pressure detecting device 230 for receiving the pressure detected by the pressure detecting device 230 and determining the blocking position of the pipeline based on the pressure, thereby controlling the opening and closing of the first valve 250.
Specifically, in one example, referring to the flow chart shown in fig. 4, the controller is configured to:
(1) judging the blocking position: when the difference between the pressure and the normal operating pressure of the pipeline is higher than a first threshold value, determining that a blockage (a blockage position C shown in FIG. 3) occurs in the pipeline on the far pump side of the position where the pressure detection device 230 is located; when the difference between the pressure and the normal operating pressure is lower than a second threshold value, it is determined that a blockage (blockage positions a and B shown in fig. 3, where a denotes in the pump and B denotes in the pipe) occurs in the pump-proximal side pipe where the pressure detection device 230 is located, where the first threshold value is a positive value and the second threshold value is a negative value;
(2) dredging pipelines: when a blockage occurs in the far pump side pipeline at the position of the pressure detection device 230, controlling the pump starting device and/or the fluid blowing device to send fluid into the pipeline in a pulse mode, so that the blockage is flushed away in the far pump direction; when a blockage occurs in the near-pump-side pipe where the pressure detection device 230 is located, the first valve 250 is controlled to be closed, and the fluid blowing device is controlled to send fluid into the pipe, so that the blockage is flushed away in the near-pump direction.
The first threshold may be determined based on the particular device and operating conditions. For example, when the system is applied in a two-wheel slot milling machine, the first threshold value may be a positive value less than or equal to 50% of the normal operating pressure of the line, preferably less than or equal to 20% of the normal operating pressure of the line, and more preferably greater than or equal to 10% of the normal operating pressure of the line and less than or equal to 20% of the normal operating pressure of the line. The second threshold may be a negative value having an absolute value less than or equal to 50% of the normal operating pressure of the circuit, preferably a negative value having an absolute value less than or equal to 20% of the normal operating pressure of the circuit, and more preferably a negative value having an absolute value greater than or equal to 10% of the normal operating pressure of the circuit and less than or equal to 20% of the normal operating pressure of the circuit.
To aid understanding, the following examples are given. In a two-wheel slotter to which the system of the present application is applied, if the normal operating pressure of the pipe is 10 (in the example, relative values, not in units), according to the experience of the person skilled in the art, the first threshold value is set to a positive value greater than or equal to 10% and less than or equal to 20% of the normal operating pressure of the pipe, i.e. 10% and 20% of the normal operating pressure of the pipe are 1 and 2, the first threshold value may take a positive value greater than or equal to 1 and less than or equal to 2, for example 1.5. When the pressure value measured by the pressure detection device is 11, the difference value between the pressure and the normal working pressure of the pipeline is 11-10 which is 1, the difference value is a positive value, 1 is less than 1.5, and the condition that the difference value is higher than a first threshold value is not met, so that the blockage is not judged; when the pressure value measured by the pressure detection device is 12, the difference between the pressure and the normal working pressure of the pipeline is 12-10, which is 2, and is a positive value, 2>1.5, and the condition that the difference is higher than the first threshold value is met, it is determined that the blockage occurs in the pipeline on the far pump side at the position of the pressure detection device 230. Setting the second threshold value to a negative value whose absolute value is greater than or equal to 10% and less than or equal to 20% of the normal operating pressure of the pipeline, that is, 10% of the normal operating pressure of the pipeline is 1 and 20% is 2, the absolute value of the first threshold value may be greater than or equal to 1 and less than or equal to 2 and a negative value, for example, 1.5. When the pressure value measured by the pressure detection device is 9, the difference value between the pressure and the normal working pressure of the pipeline is 9-10-1, which is a negative value, -1> -1.5, and the condition that the difference value between the pressure and the normal working pressure is lower than a second threshold value is not met, and the blockage is not judged; when the pressure value measured by the pressure detection device is 8, the difference between the pressure and the normal working pressure of the pipeline is 8-10-2, which is a negative value, -2-1.5, and the condition that the difference between the pressure and the normal working pressure is lower than the second threshold value is met, and the blockage in the pipeline on the side close to the pump at the position of the pressure detection device 230 is judged.
The determination of the normal working pressure of the pipeline is not particularly limited in this application, and can be performed by those skilled in the art according to various conventional manners in the art, such as: empirical values obtained by long-term observation, fitted values obtained by data processing, values of the pressure detection device 230 obtained by steady operation a short time before the blockage, and the like.
In one example, the controller is further configured to: before calculating the difference between the pressure measured by the pressure detecting means 230 and the normal operating pressure of the pipeline, it is determined whether a blockage occurs in the pipeline according to the flow rate obtained by the flow rate detecting means 220. According to specific working conditions, when the flow rate is less than 90% (or 80%, or 70%, or 60%, or 50%, etc.) of the normal working flow rate of the pipeline, the blockage in the pipeline is judged. The normal operating flow of the pipeline is determined in a manner conventional in the art.
After determining the approximate location of the occlusion, the system of the present application is also able to unclog the occlusion location.
When a blockage occurs in the far pump side pipe at the position of the pressure detection device 230, the pump is controlled to be started (the pump is controlled to be stopped and then suddenly started to generate a pulse) and/or the fluid blowing device (the fluid blowing device is not operated under a normal working condition, and the second valve 241 is closed) is controlled to send the fluid to the pipe in a pulse mode, so that the blockage is pushed away in the far pump direction.
When a blockage occurs in the near-pump-side pipe where the pressure detection device 230 is located, the first valve 250 is controlled to be closed and the pump stops operating, and the fluid blowing device 240 is controlled to send fluid (gas or liquid or gas-liquid mixture) to the pipe, so that the blockage is flushed in the near-pump direction. In one example, the fluid is delivered in pulses. In many cases, the blockage site occurs inside the pump, and fluid is pulsed through the fluid blower 240 such that the blockage moves in a proximal direction to the pump and is eventually flushed out of the fluid inlet of the pump.
According to the embodiment of the application, the parts such as the pressure detection device, the fluid blowing device, the first valve and the like are orderly arranged on the pipeline, so that the blocking position can be treated according to different conditions, the blocking position is positioned in the pump (or a section close to the pump, or a section between the pump and the pressure detection device) or in the pipeline (or a section far away from the pump, or a pipeline section far away from the pump), and the blocking position is dredged in different modes according to different conditions; the pipeline can be changed as little as possible, the brought additional cost is less, and the cost efficiency is higher.
It should be understood that the above control means may also be controlled or operated by a person. For example, an operator of the double-wheel slot milling machine determines different blockage conditions according to the indication of the pressure detection device and the flow detection device, and dredges the blocked pipeline by operating the switch of the first valve and/or the second valve according to the control mode. The detailed operation flow is similar to the above control method, and is not described herein again.
One embodiment of the present application provides a double-wheel slot milling machine, including: a pump 210; a pipeline connected with the pump; a system for dredging a pipeline as in the previous example.
The way of arranging the pipeline dredging system in the double-wheel slot milling machine is as described above, and is not described in detail herein.
Through being applied to double round slot milling machine with the system of this application in, can effectively solve current double round slot milling machine and can't dredge the defect of pipeline under the condition of not tearing open the pipe, can dredge the processing to the jam condition correspondence of difference, except that the very serious condition of few jam, the jam condition more than 95% can be solved in this application, has higher cost-effective rate and operating efficiency.
Fig. 4 is a flowchart illustrating a method for unblocking a pipeline according to an exemplary embodiment of the present application. Referring to the flowchart, a method for dredging a pipeline according to an embodiment of the present application includes the following steps.
The pressure at its location is detected 410 by a pressure detecting means 230 provided in the pipe connected to the pump 210.
The difference between the sensed pressure and the normal operating pressure is calculated 415. The difference may be calculated, for example, as follows: Δ V ═ V-V0(where Δ V is a pressure difference, V is a pressure detected by the pressure detecting means 230, and V0 is a normal operating pressure).
When the difference between the pressure and the normal working pressure of the pipeline is higher than the first threshold value, it is determined that a blockage (a blockage position C shown in fig. 3) occurs in the far pump side pipeline where the pressure detection device is located, and step 425 is executed.
423 determining that a blockage occurs in the pipe on the side near the pump (shown as blockage positions a and B in fig. 3, where a represents in the pump and B represents in the pipe) at the position of the pressure detection device 230 when the difference between the pressure and the normal operating pressure is lower than a second threshold, executing step 430; wherein the first threshold is a positive value and the second threshold is a negative value.
And 424, if the difference value is larger than or equal to the second threshold value and smaller than or equal to the first threshold value, judging that the blockage does not occur.
425, in case of a blockage in the pipe on the far pump side where the pressure detection means 230 is located, controlling the pump activation and/or the fluid blowing means to send the fluid in a pulsed manner into the pipe so that the blockage is flushed away in the direction of the far pump.
430, when a blockage occurs in the near-pump side pipe where the pressure detecting means 230 is located, the first valve 250 disposed at the side of the pressure detecting means 230 away from the pump is controlled to be closed, and the fluid blowing means 240 is controlled to send the fluid into the pipe so that the blockage is flushed away in the near-pump direction.
The method of the present application may be implemented by a human or a controller. Specific embodiments may be made with reference to the aforementioned controller. And will not be described in detail herein.
The method of the present application may further include determining whether a blockage occurs in the pipeline according to the flow rate obtained by the flow rate detection device 220 before calculating the difference between the pressure measured by the pressure detection device 230 and the normal operating pressure of the pipeline. Specific embodiments may be made with reference to the aforementioned controller. And will not be described in detail herein.
Based on the embodiment of the application, different conditions of the blocked site can be effectively judged, and the blocked site is dredged in different ways according to different conditions; therefore, the dredging is more efficient, and the device is particularly suitable for pipelines with long pipelines but obvious regular occurrence probability of the blockage position (for example, the probability of blockage in the pump is higher, and the pipeline is divided into a near pump section and a far pump section by arranging the pressure detection device at a place close to the pump, so that the problem under most conditions can be effectively solved).
It should be noted that in the present application, the terms "line" and "pipe" have slightly different meanings, and the term "line" is broader and also includes various passages inside the device for passing a fluid, such as passages in a pump, and the like. The form of the piping and tubing is not particularly limited in this application and the terms "piping" and "tubing" are to be interpreted as broadly as possible.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.
Claims (11)
1. A system for unblocking a pipe having a first end connected to a pump, the system comprising:
the pressure detection device is arranged on the pipeline and used for judging whether the pipeline is blocked or not;
a fluid blowing device connected to the pipe for blowing fluid into the pipe when the pipe is clogged;
a first valve provided on the pipe and located on a side of the pressure detection device and the fluid blowing device away from the pump, for shutting off the pipe when the pipe between the pressure detection device and the pump is clogged.
2. The system according to claim 1, wherein the piping includes a first piping at the first end and a second piping at a second end of the piping, the pressure detecting device and the fluid blowing device being provided on the first piping.
3. The system of claim 2, wherein the first valve is disposed on the second line.
4. The system of claim 1, further comprising a flow detection device disposed on the conduit for determining whether the conduit is blocked.
5. The system according to claim 4, wherein the pump, the flow rate detecting means, the pressure detecting means, the fluid blowing means, and the first valve are provided in this order; alternatively, the pump, the pressure detecting device, the flow rate detecting device, the fluid blowing device, and the first valve are sequentially provided in this order.
6. The system of claim 1, wherein the fluid blowing device comprises:
a fluid supply device;
a branch line connected between the line and the fluid supply device;
and the second threshold door is arranged on the branch pipeline and used for opening the second threshold door when the pipeline between the pressure detection device and the pump is blocked so that the branch pipeline blows fluid to the pipeline.
7. The system of claim 1, further comprising a controller coupled to the pressure detection device for receiving the pressure detected by the pressure detection device and determining a blocked position of the line based on the pressure to control the opening and closing of the first valve.
8. The system of claim 7, wherein the controller is configured to:
when the difference value between the pressure and the normal working pressure of the pipeline is higher than a first threshold value, judging that the pipeline at the far pump side where the pressure detection device is located is blocked; when the difference value between the pressure and the normal working pressure is lower than a second threshold value, judging that the pipeline on the side close to the pump where the pressure detection device is located is blocked, wherein the first threshold value is a positive value, and the second threshold value is a negative value;
when a blockage occurs in the far pump side pipeline at the position of the pressure detection device, controlling the pump starting device and/or the fluid blowing device to send fluid to the pipeline in a pulse mode, so that the blockage is flushed away in the far pump direction; when a blockage occurs in the near pump side pipeline at the position of the pressure detection device, the first valve is controlled to be closed, the pump stops running, and the fluid blowing device is controlled to send fluid to the pipeline, so that the blockage is flushed in the near pump direction.
9. The system according to any one of claims 1 to 8, applied to a two-wheel slot milling machine, wherein the pump is a slurry pump and the pipeline is a pipeline for conveying slurry, comprising rubber pipes, steel pipes, hoses and ground pipelines which are connected with the pump in sequence.
10. A double-wheel slot milling machine is characterized by comprising:
a pump;
a pipeline connected with the pump;
a system of dredging conduits as claimed in any one of claims 1 to 9.
11. A method of unblocking a pipeline, comprising:
detecting the pressure at the position of the pump through a pressure detection device arranged in a pipeline connected with the pump;
determining that a blockage occurs in the pump-side-remote conduit at which the pressure detection device is located when the difference between the pressure and the normal operating pressure of the conduit is above a first threshold; when the difference value between the pressure and the normal working pressure is lower than a second threshold value, determining that the pipeline on the near pump side of the position where the pressure detection device is located is blocked, wherein the first threshold value is a positive value, and the second threshold value is a negative value;
when a blockage occurs in the far pump side pipeline at the position of the pressure detection device, controlling a pump starting device and/or a fluid blowing device to send fluid into the pipeline in a pulse mode, so that the blockage is flushed away in the far pump direction; when a blockage occurs in the pipeline on the side close to the pump at the position of the pressure detection device, controlling a first valve arranged on the side, far away from the pump, of the pressure detection device to be closed, and controlling the fluid blowing device to send fluid into the pipeline, so that the blockage is flushed in the direction close to the pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011241390.3A CN112252454A (en) | 2020-11-09 | 2020-11-09 | System and method for dredging pipeline and double-wheel slot milling machine |
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| CN202011241390.3A CN112252454A (en) | 2020-11-09 | 2020-11-09 | System and method for dredging pipeline and double-wheel slot milling machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048407A (en) * | 2021-03-18 | 2021-06-29 | 中国商用飞机有限责任公司 | System for detecting and dredging blockage point of aircraft waste water pipeline and control method thereof |
-
2020
- 2020-11-09 CN CN202011241390.3A patent/CN112252454A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048407A (en) * | 2021-03-18 | 2021-06-29 | 中国商用飞机有限责任公司 | System for detecting and dredging blockage point of aircraft waste water pipeline and control method thereof |
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