System, method and double-wheel slot milling machine for unclogging pipelines

Abstract

The present application relates to the field of mechanical engineering, and specifically to a system and method for unblocking pipelines, and a double-wheel slot milling machine. The present application provides a system for unblocking pipelines, wherein the first end of the pipeline is connected to a pump, and the system comprises: a pressure detection device, which is arranged on the pipeline, and is used to determine whether the pipeline is blocked; a fluid blowing device, which is connected to the pipeline, and is used to blow fluid into the pipeline when the pipeline is blocked; a first valve, which is arranged on the pipeline and is located on the side of the pressure detection device and the fluid blowing device away from the pump, and is used to shut off the pipeline when the pipeline between the pressure detection device and the pump is blocked. The system and method of the present application are convenient and fast, do not require pipe disassembly, and can make as few changes to the pipeline as possible, resulting in less additional cost and higher cost-effectiveness. It is particularly suitable for pipelines where the probability of blockage locations is long but has an obvious regularity, such as the mud pipeline of a double-wheel slot milling machine.

Description

Technical Field

[0001] The present application relates to the field of mechanical engineering, and in particular to a system for unclogging a pipeline, a method for unclogging a pipeline, and a double-wheel groove milling machine. Background Art

[0002] Double-wheel slot milling machine is a commonly used equipment in engineering machinery. In the process of using double-wheel slot milling machine for slag removal, it is necessary to use pipelines to pump mud over long distances. Due to the different sizes of stones and the entry of steel bars into the mud pump during the second-stage slot milling, slag removal is often interrupted. However, due to the long mud pipeline, it is very difficult to detect the blockage position. And there is no very effective unblocking method at present. When the pipeline is blocked and unblocked, the machine must be stopped and the pipe must be removed, which greatly affects the progress of engineering operations.

[0003] Therefore, it is very important to find a system suitable for a double-wheel slot milling machine that can efficiently find the approximate location of the blockage and dredge it. Summary of the invention

[0004] In view of this, the embodiments of the present application are directed to providing a system for unclogging a pipeline, a method for unclogging a pipeline, and a double-wheel groove milling machine.

[0005] In a first aspect, the present application provides a system for unclogging a pipeline, wherein a first end of the pipeline is connected to a pump, and the system comprises: a pressure detection device, disposed on the pipeline, for determining whether the pipeline is blocked; a fluid blowing device, connected to the pipeline, for blowing fluid into the pipeline when the pipeline is blocked; a first valve, disposed on the pipeline and located on a side of the pressure detection device and the fluid blowing device away from the pump, for shutting off the pipeline when the pipeline between the pressure detection device and the pump is blocked.

[0006] In one example, the pipeline includes a first pipeline located at a first end and a second pipeline located at a second end of the pipeline, and the pressure detection device and the fluid blowing device are disposed on the first pipeline.

[0007] In one example, the first valve is disposed on the second pipeline.

[0008] Optionally, the system further comprises a flow detection device, which is disposed on the pipeline and is used to determine whether the pipeline is blocked.

[0009] In one example, a pump, a flow detection device, a pressure detection device, a fluid blowing device and a first valve are arranged in sequence.

[0010] In one example, a pump, a pressure detection device, a flow detection device, a fluid blowing device and a first valve are arranged in sequence.

[0011] In one example, the fluid blowing device includes: a fluid supply device; a branch pipeline connected between the pipeline and the fluid supply device; a second threshold gate arranged on the branch pipeline, which is used to open the second threshold gate when the pipeline between the pressure detection device and the pump is blocked, so that the branch pipeline can blow fluid into the pipeline.

[0012] Optionally, the system further includes a controller connected to the pressure detection device, configured to receive the pressure detected by the pressure detection device, and determine the blockage position of the pipeline based on the pressure, thereby controlling the opening and closing of the first valve.

[0013] In one example, the controller is used to: determine that a blockage occurs in the pipeline 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; determine that a blockage occurs in the pipeline on the near pump side where the pressure detection device is located when the difference between the pressure and the normal working pressure is lower than a second threshold value, wherein the first threshold value is a positive value and the second threshold value is a negative value; when a blockage occurs in the pipeline on the far pump side where the pressure detection device is located, control the pump to start and / or the fluid blowing device to send fluid into the pipeline in a pulsed manner so that the blockage is flushed toward the far pump; when a blockage occurs in the pipeline on the near pump side where the pressure detection device is located, control the first valve to close and the pump to stop running, and control the fluid blowing device to send fluid into the pipeline so that the blockage is flushed toward the near pump.

[0014] In one example, the system is applied to a double-wheel slot milling machine, the pump is a mud pump, and the pipeline is a pipeline for conveying mud, including a rubber tube, a steel pipe, a hose and a ground pipeline connected to the pump in sequence.

[0015] The second aspect of the present application provides a double-wheel slot milling machine, including: a pump; a pipeline connected to the pump; and a system for unblocking pipelines as in the first aspect of the present application.

[0016] The third aspect of the present application provides a method for unblocking a pipeline, comprising: detecting the pressure at the location of a pressure detection device disposed in a pipeline connected to a pump; determining that a blockage occurs in the pipeline 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; determining that a blockage occurs in the pipeline on the near pump side where the pressure detection device is located when the difference between the pressure and the normal working pressure is lower than a second threshold value, wherein the first threshold value is a positive value and the second threshold value is a negative value; when a blockage occurs in the pipeline on the far pump side where the pressure detection device is located, controlling the pump to start and / or the fluid blowing device to feed fluid into the pipeline in a pulsed manner so that the blockage is flushed away in the direction of the far pump; when a blockage occurs in the pipeline on the near pump side where the pressure detection device is located, controlling a first valve disposed on the side of the pressure detection device away from the pump to close, and controlling the fluid blowing device to feed fluid into the pipeline so that the blockage is flushed away in the direction of the near pump.

[0017] Based on the embodiments of the present application, by orderly arranging components such as a pressure detection device, a fluid blowing device, and a first valve on the pipeline, the blockage position can be handled according to different situations, depending on whether the blockage position is located in the pump (or a section near the pump, or a section between the pump and the pressure detection device) or in the pipeline (or a section far from the pump, or a section of the pipeline where the pressure detection device is far from the pump), and different methods are adopted to clear the blockage site according to different situations, so that the pipeline can be modified as little as possible, resulting in less additional cost and higher cost efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic structural diagram of a double-wheel slot milling machine in the prior art.

[0019] Figure 2 Shown is a simplified schematic diagram of a pipeline unblocking system provided according to an exemplary embodiment of the present application when applied to a double-wheel slot milling machine.

[0020] Figure 3 Shown is a simplified schematic diagram of a pipeline unblocking system provided according to an exemplary embodiment of the present application.

[0021] Figure 4 Shown is a flow chart of a method for unclogging a pipeline provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The system and method of the present application are particularly suitable for pipelines where the pipeline is long but the probability of blockage location occurring has an obvious regularity, such as the mud pipeline of a double-wheel slot milling machine.

[0024] like Figure 1 As shown, a guide wheel group 110 is usually provided on the top of the mast 130 of a conventional double-wheel slotting machine for guiding an oil pipe 111 and a mud pipe 112; the oil pipe 111 and the mud pipe 112 are connected to the internal structure of a tool holder 120; specifically, inside the tool holder 120, the oil pipe 111 is connected in sequence to an oil steel pipe 121', an oil rubber pipe 122' and an oil pump 123', and the mud pipe 112 is connected in sequence to a mud steel pipe 121", a mud rubber pipe 122" and a mud pump 123".

[0025] The inventors of the present application have found that when a double-wheel slot milling machine is blocked, the probability of blockage in the pump is higher than that in a very long pipe. That is to say, if it is possible to first determine whether the blockage site occurs in the pump or in the pipe, the time for finding the blockage site can be effectively saved; further, for the two different situations of blockage in the pump and blockage in the pipe, the inventors of the present application have found different dredging methods to be used respectively, which can effectively dredge the blockage without stopping work and removing the pipe. In addition, equipment and operating costs are issues that need to be considered in construction. The inventors of the present application have found that some existing systems and methods for dredging pipeline blockages are too complicated, requiring more improvements to the equipment and systems, and increasing more costs. However, the time they really work is limited, and it is not actually cost-effective; in order to maximize cost-effectiveness and solve the problem of blockage with as few improvements as possible, the inventors of the present application have proposed the technical solution of the present application.

[0026] According to one embodiment of the present application, the system for clearing pipelines is, for example, Figure 3 shown.

[0027] In one example, the system is applied to a double wheel slot milling machine, such as Figure 2 shown.

[0028] The following combination Figure 1 , Figure 2 and Figure 3 The system for unclogging pipelines of the present application is described with examples.

[0029] Inside the tool holder 120, a pump 123 (including an oil pump 123' and a mud pump 123"), a rubber tube 122 (including an oil rubber tube 122' and a mud rubber tube 122") and a steel tube 121 (including an oil steel tube 121' and a mud steel tube 121") are arranged in order from bottom to top; outside the tool holder, the steel tube 121 is connected to a hose (including an oil tube 111 and a mud tube 112), and passes through Figure 1 After the large guide wheel assembly on the lower right, a hose is connected to a ground pipeline (not shown in the figure); the ground pipeline is not limited to the part in contact with the ground, but all pipelines connected by hoses (even those not in the form of pipes) are collectively referred to as ground pipelines.

[0030] Since mud pipelines are prone to clogging, in one example, the pump 210 in the system of the present application is Figure 1 The mud pump 123'' shown in the figure is a pipeline for conveying mud, and includes a rubber tube 122, a steel tube 121, a hose and a ground pipeline which are sequentially connected to the pump.

[0031] The pressure detection device 230 is arranged on the pipeline to detect the pressure of the pipeline at the location. According to the pressure, it can be determined whether blockage occurs in the pipeline and even the approximate location of the blockage can be determined.

[0032] In an example applied to a double-wheel slot milling machine, the pressure detection device 230 can be arranged at the outlet of the pump 123 (referring to the small section of the pipeline located at the pump outlet), on the rubber tube 122, on the steel pipe 121, and at the connection between them (in this application, the term "connection part" is not limited to the joint where two components are connected, but the parts located on the two components and close to the joint can be understood as being located at the connection part.). In a preferred case, at least one pressure detection device 230 is arranged at the outlet of the pump 123 or on the rubber tube 122. Considering the highest cost-effectiveness, in one example, only one pressure detection device 230 is arranged, and it is located at the outlet of the pump 123 or on the rubber tube 122 and close to the connection between the pump 123 and the rubber tube 122.

[0033] The fluid blowing device 240 is connected to the pipeline and is used to blow fluid into the pipeline when the pipeline is blocked. The fluid blown is not particularly limited, as long as it can exert enough force to make the blockage be flushed. For example, the fluid blown can be gas, liquid, gas-liquid mixture (such as liquid entrained bubbles), etc.

[0034] In one example, the fluid blowing device 240 is disposed on a side of the pressure detection device 230 that is away from the pump. In a further embodiment, the distance between the fluid blowing device 240 and the pressure detection device 230 is relatively close, so as to shorten the distance between the fluid blowing device 240 and the blockage position when the blockage position occurs between the pressure detection device 230 and the pump 210.

[0035] In an example applied to a double-wheel slot milling machine, the fluid blowing device 240 is disposed on the rubber tube 122 and / or the steel tube 121. In a preferred embodiment, considering the probability of a blockage position occurring in the double-wheel slot milling machine, at least one fluid blowing device 240 is disposed on the rubber tube 122. Considering the highest cost effectiveness, in an example, there is only one fluid blowing device 240 disposed on the rubber tube 122.

[0036] In one example, the fluid blowing device 240 includes: a fluid supply device (not shown in the figure); a branch pipeline 242, connected between the pipeline and the fluid supply device; a second threshold gate 241, arranged on the branch pipeline, for opening the second threshold gate 241 when the pipeline between the pressure detection device and the pump is blocked, so that the branch pipeline blows fluid into the pipeline.

[0037] The first valve 250 is disposed on the pipeline and is used to shut off the pipeline when the pipeline between the pressure detection device 230 and the pump 210 is blocked. The first valve 250 is located on the side of the pressure detection device 230 and the fluid blowing device 240 away from the pump, so that when the first valve 250 is closed, the fluid blowing device 240 can function effectively.

[0038] In an example applied to a double-wheel slotting machine, at least one first valve 250 is disposed on a ground pipeline, such as a pipeline in an engine.

[0039] In one example, the pump 210 , the pressure detection device 230 , the fluid blowing device 240 , and the first valve 250 are sequentially arranged.

[0040] In another example, the pump 210 , the fluid blowing device 240 , the pressure detecting device 230 and the first valve 250 may also be arranged in sequence.

[0041] In an example applied to a double-wheel milling machine, the pressure detection device 230 is arranged at the outlet of the pump or the fluid blowing device 240 on the rubber tube. The fluid blowing device 240 is arranged on the rubber tube and is located on the side of the pressure detection device 230 away from the pump. The first valve 250 is arranged on the ground pipeline.

[0042] In one example, the pipeline includes a first pipeline located at a first end and a second pipeline located at a second end of the pipeline, and the pressure detection device and the fluid blowing device are disposed on the first pipeline.

[0043] In one example, the first valve 250 is disposed on the second pipeline.

[0044] In an example applied to a double-wheel slot milling machine, the first pipeline includes a pump outlet and a rubber tube 122, and the second pipeline includes a steel pipe 121, a hose and a ground pipeline.

[0045] In another example applied to a double-wheel slotting machine, the first pipeline includes a pump outlet, a rubber tube 122 and a steel tube 121, and the second pipeline includes a hose and a ground pipeline.

[0046] Optionally, the system further includes a flow detection device 220, which is disposed on the pipeline and is used to determine whether the pipeline is blocked. The pressure detection device 230 usually acts before the pressure detection device 230, that is, the flow detection device 220 is used to determine whether a blockage occurs in the pipeline, and then the pressure detection device 230 is used to determine the blockage position.

[0047] The flow detection device 220 can be set at any position on the pipeline. In an example applied to a double-wheel slot milling machine, it is set on the first pipeline, and can further be set at the outlet of the pump.

[0048] In one example, the pump 210 , the flow detection device 220 , the pressure detection device 230 , the fluid blowing device 240 , and the first valve 250 are sequentially arranged.

[0049] In another example, the pump 210 , the pressure detection device 230 , the flow detection device 220 , the fluid blowing device 240 , and the first valve 250 are sequentially arranged.

[0050] In another example, the pump 210 , the flow detection device 220 , the fluid blowing device 240 , the pressure detection device 230 , and the first valve 250 are sequentially arranged.

[0051] 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 in the figure), which is connected to the pressure detection device 230, and is used to receive the pressure detected by the pressure detection device 230, and determine the blockage position of the pipeline based on the pressure, and then control the opening and closing of the first valve 250.

[0052] Specifically, in one example, referring to Figure 4 As shown in the flowchart, the controller is used to:

[0053] (1) Determining the blockage position: When the difference between the pressure and the normal working pressure of the pipeline is higher than the first threshold, it is determined that a blockage occurs in the far pump side pipeline where the pressure detection device 230 is located (e.g. Figure 3 When the difference between the pressure and the normal working pressure is lower than the second threshold, it is determined that the pressure detection device 230 is located in the near-pump side pipeline and is blocked (such as Figure 3 The blockage positions A and B shown, where A represents the blockage position in the pump and B represents the blockage position in the pipeline), where the first threshold value is a positive value and the second threshold value is a negative value;

[0054] (2) Unblocking the pipeline: When a blockage occurs in the pipeline on the far pump side where the pressure detection device 230 is located, the pump is controlled to start and / or the fluid blowing device is controlled to send fluid into the pipeline in a pulsed manner, so that the blockage is flushed toward the far pump; when a blockage occurs in the pipeline on the near pump side 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 pipeline, so that the blockage is flushed toward the near pump.

[0055] The first threshold value can be determined according to specific equipment and working conditions. For example, when the system is applied to a double-wheel slot milling machine, the first threshold value can be a positive value less than or equal to 50% of the normal working pressure of the pipeline, preferably a positive value less than or equal to 20% of the normal working pressure of the pipeline, and more preferably a positive value greater than or equal to 10% of the normal working pressure of the pipeline and less than or equal to 20% of the normal working pressure of the pipeline. The second threshold value can be a negative value with an absolute value less than or equal to 50% of the normal working pressure of the pipeline, preferably a negative value with an absolute value less than or equal to 20% of the normal working pressure of the pipeline, and more preferably a negative value with an absolute value greater than or equal to 10% of the normal working pressure of the pipeline and less than or equal to 20% of the normal working pressure of the pipeline.

[0056] To help understanding, the following examples are given. In a double-wheel slot milling machine using the system of the present application, if the normal working pressure of the pipeline is 10 (a relative value in the example, without a unit), according to the experience of those skilled in the art, the first threshold is set to a positive value greater than or equal to 10% of the normal working pressure of the pipeline and less than or equal to 20% of the normal working pressure of the pipeline, that is, 10% of the normal working pressure of the pipeline is 1 and 20% is 2, then the first threshold can be 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 between the pressure and the normal working pressure of the pipeline is 11-10=1, which is a positive value, 1<1.5, and does not meet the condition that the difference is higher than the first threshold, so it is not determined to be blocked; 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=2, which is a positive value, 2>1.5, and meets the condition that the difference is higher than the first threshold, and it is determined that a blockage occurs in the far pump side pipeline where the pressure detection device 230 is located. The second threshold is set to a negative value whose absolute value is greater than or equal to 10% of the normal working pressure of the pipeline and less than or equal to 20% of the normal working pressure of the pipeline, that is, 10% of the normal working pressure of the pipeline is 1 and 20% is 2, then the absolute value of the first threshold can be greater than or equal to 1 and less than or equal to 2 and is a negative value, for example, -1.5. When the pressure value measured by the pressure detection device is 9, the difference between the pressure and the normal working pressure of the pipeline is 9-10=-1, which is a negative value, -1>-1.5, which does not meet the condition that the difference between the pressure and the normal working pressure is lower than the second threshold, and is not determined to be blocked; 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, which meets the condition that the difference between the pressure and the normal working pressure is lower than the second threshold, and it is determined that blockage occurs in the pipeline near the pump where the pressure detection device 230 is located.

[0057] In the present application, there is no particular limitation on the method for determining the normal working pressure of the pipeline, and those skilled in the art can determine it according to various conventional methods in the art, such as: empirical values ​​obtained through long-term observation, fitting values ​​obtained through data processing, and the value of the pressure detection device 230 obtained when it is running stably for a short period of time before blockage.

[0058] In one example, the controller is further used to: before calculating the difference between the pressure measured by the pressure detection device 230 and the normal working pressure of the pipeline, first determine whether the pipeline is blocked according to the flow rate obtained by the flow detection device 220. According to the 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, it is determined that the pipeline is blocked. The normal working flow rate of the pipeline is determined in a conventional manner in the art.

[0059] After determining the approximate location of the blockage, the system of the present application can also clear the blockage location.

[0060] When blockage occurs in the pipeline on the far pump side where the pressure detection device 230 is located, the control pump is started (the control pump must be stopped first and then suddenly started to generate a pulse) and / or the fluid blowing device (under normal working conditions, the fluid blowing device is not running and the second valve 241 is closed) to send fluid into the pipeline in a pulsed manner, so that the blockage is flushed away in the direction of the far pump.

[0061] When a blockage occurs in the pipeline near the pump where the pressure detection device 230 is located, the first valve 250 is controlled to be closed and the pump is stopped, and the fluid blowing device 240 is controlled to send fluid (gas or liquid or gas-liquid mixture) into the pipeline so that the blockage is flushed toward the pump. In one example, the fluid is sent in a pulsed manner. In many cases, the blockage occurs inside the pump, and the fluid is sent in a pulsed manner through the fluid blowing device 240, so that the blockage moves toward the pump and is finally flushed out from the fluid inlet of the pump.

[0062] Based on the embodiments of the present application, by orderly arranging components such as a pressure detection device, a fluid blowing device, and a first valve on the pipeline, the blockage position can be handled according to different situations, depending on whether the blockage position is located in the pump (or a section near the pump, or a section between the pump and the pressure detection device) or in the pipeline (or a section far from the pump, or a section of the pipeline where the pressure detection device is far from the pump), and different methods are adopted to clear the blockage site according to different situations; the pipeline can be modified as little as possible, resulting in less additional cost and higher cost-effectiveness.

[0063] It should be understood that the above control method can also be controlled or operated by a person. For example, the operator of the double-wheel slot milling machine determines different blockage conditions according to the instructions of the pressure detection device and the flow detection device, and clears the blocked pipeline by operating the switch of the first valve and / or the second valve according to the above control method. The detailed operation process is similar to the above control method and will not be repeated here.

[0064] A specific embodiment of the present application provides a double-wheel slot milling machine, including: a pump 210; a pipeline connected to the pump; and a system for unblocking the pipeline as in the aforementioned example.

[0065] The manner in which the pipeline unblocking system is arranged in the double-wheel slot milling machine is as described above and will not be repeated here.

[0066] By applying the system of the present application to a double-wheel slot milling machine, the defect that the existing double-wheel slot milling machine cannot dredge the pipeline without dismantling the pipe can be effectively solved, and corresponding dredging treatment can be performed according to different blockage situations. Except for a very small number of particularly serious blockages, the present application can solve more than 95% of the blockage situations, and has higher cost-effectiveness and operating efficiency.

[0067] Figure 4 The flowchart of the method for unblocking a pipeline provided by an exemplary embodiment of the present application is shown. Referring to the flowchart, the method for unblocking a pipeline in an embodiment of the present application includes the following contents.

[0068] 410 , the pressure at the location is detected by a pressure detection device 230 disposed in a pipeline connected to the pump 210 .

[0069] 415, calculate the difference between the detected pressure and the normal working pressure. For example, the difference may be calculated according to the following formula: ΔV=V-V0 (where ΔV is the pressure difference, V is the pressure detected by the pressure detection device 230, and V0 is the normal working pressure).

[0070] 420, when the difference between the pressure and the normal working pressure of the pipeline is higher than the first threshold, it is determined that a blockage occurs in the far pump side pipeline where the pressure detection device is located (e.g. Figure 3 The blocking position C) is shown, and step 425 is executed.

[0071] 423, when the difference between the pressure and the normal working pressure is lower than the second threshold, it is determined that a blockage occurs in the near-pump-side pipeline where the pressure detection device 230 is located (e.g. Figure 3 The blockage positions A and B are shown, where A represents the blockage position in the pump and B represents the blockage position in the pipeline), and step 430 is performed; wherein the first threshold value is a positive value and the second threshold value is a negative value.

[0072] 424 , if the difference is greater than or equal to the second threshold and less than or equal to the first threshold, it is determined that no congestion occurs.

[0073] 425. When a blockage occurs in the pipeline on the far pump side where the pressure detection device 230 is located, the pump is controlled to start and / or the fluid blowing device is controlled to send fluid into the pipeline in a pulsed manner so that the blockage is flushed away in the direction of the far pump.

[0074] 430. When a blockage occurs in the pipeline near the pump where the pressure detection device 230 is located, the first valve 250 arranged on the side of the pressure detection device 230 away from the pump is controlled to be closed, and the fluid blowing device 240 is controlled to send fluid into the pipeline, so that the blockage is flushed toward the direction near the pump.

[0075] The method of the present application can be implemented by a person or by a controller. The specific implementation method can be carried out by referring to the aforementioned controller method. No further details will be given here.

[0076] The method of the present application may also include determining whether a blockage has occurred 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 working pressure of the pipeline. The specific implementation method can refer to the aforementioned controller method. No further details are given here.

[0077] Based on the embodiments of the present application, it is possible to effectively judge different situations of the blockage site and adopt different methods to dredge the blockage site according to different situations; thus making the dredging more efficient, which is particularly suitable for pipelines that are long but have obvious regularity in the probability of blockage locations (for example, the probability of blockage in a pump is high, and by setting the pressure detection device close to the pump and dividing the pipeline into a near-pump section and a far-pump section, the problem in most cases can be effectively solved).

[0078] It should be noted that in this application, the terms "pipeline" and "pipeline" have slightly different meanings. The concept of "pipeline" is broader and also includes various channels inside equipment for passing fluids, such as channels in pumps, etc. In this application, there is no special limitation on the form of pipelines and pipes, so the terms "pipeline" and "pipeline" are interpreted as broadly as possible.

[0079] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for unclogging a pipeline, for unclogging a pipeline having a first end connected to a pump, characterized in that: A system for unclogging a pipeline is used, the system comprising: A pressure detection device, arranged on the pipeline, for determining whether the pipeline is blocked; a fluid blowing device connected to the pipeline and arranged near the pressure detection device, used to blow fluid into the pipeline when the pipeline is blocked; the fluid blowing device comprises a fluid supply device, a branch pipeline and a second valve; the branch pipeline is connected between the pipeline and the fluid supply device; the second valve is arranged on the branch pipeline, used to open the second valve when the pipeline between the pressure detection device and the pump is blocked, so that the branch pipeline blows fluid into the pipeline; a first valve, arranged on the pipeline and located on a side of the pressure detection device and the fluid blowing device away from the pump, and used to shut off the pipeline when the pipeline between the pressure detection device and the pump is blocked; the pipeline comprises a first pipeline located at the first end and a second pipeline located at the second end of the pipeline, the pressure detection device and the fluid blowing device are arranged on the first pipeline; the first valve is arranged on the second pipeline; A flow detection device, arranged on the pipeline, for determining whether the pipeline is blocked; The pump, the flow detection device, the pressure detection device, the fluid blowing device and the first valve are sequentially arranged; or the pump, the pressure detection device, the flow detection device, the fluid blowing device and the first valve are sequentially arranged; The method for unclogging the pipeline comprises: When the difference between the pressure and the normal working pressure of the pipeline is higher than a first threshold, it is determined that a blockage occurs in the far-pump-side pipeline where the pressure detection device is located; when the difference between the pressure and the normal working pressure is lower than a second threshold, it is determined that a blockage occurs in the near-pump-side pipeline where the pressure detection device is located, wherein the first threshold is a positive value and the second threshold is a negative value; When a blockage occurs in the pipeline on the far pump side where the pressure detection device is located, the pump is controlled to start and / or the fluid blowing device to send fluid into the pipeline in a pulsed manner, so that the blockage is flushed toward the far pump; when a blockage occurs in the pipeline on the near pump side where the pressure detection device is located, the first valve is controlled to close and the pump is stopped, and the fluid blowing device is controlled to send fluid into the pipeline, so that the blockage is flushed toward the near pump.

2. The method for unclogging a pipeline according to claim 1, characterized in that: The system also includes a controller connected to the pressure detection device, configured to receive the pressure detected by the pressure detection device, and determine the blockage position of the pipeline based on the pressure, thereby controlling the opening and closing of the first valve.

3. The method for unclogging a pipeline according to claim 1 or 2, characterized in that: The system is applied to a double-wheel slot milling machine, the pump is a mud pump, and the pipeline is a pipeline for conveying mud, including a rubber tube, a steel pipe, a hose and a ground pipeline connected to the pump in sequence.

4. A double-wheel slot milling machine, characterized in that: The method for unclogging a pipeline according to any one of claims 1 to 3 is applicable; the double-wheel slot milling machine comprises: Pumps; a pipeline connected to the pump; The system for unclogging a pipeline is a system in the method for unclogging a pipeline as claimed in any one of claims 1 to 3.

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