CN112742109A

CN112742109A - Device for assisting in cleaning pipelines

Info

Publication number: CN112742109A
Application number: CN201911041539.0A
Authority: CN
Inventors: 童世俊; 刘美友; 王盛山; 庄旭; 李宝强; 徐鹏飞; 游鑫; 陈树; 曾其信; 郑伟涛; 王俊芳; 岳清政; 姜培斌; 于东瑶; 孙念领; 闫锐; 王珺琛; 常镇伟; 杨大中; 费发奇
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2021-05-04
Anticipated expiration: 2039-10-30
Also published as: CN112742109B

Abstract

The present invention provides a device for assisting in cleaning a pipeline, the pipeline being cut at a predetermined location to form a first section and a second section, the device comprising: the sand filtering device comprises a first connecting pipe, a sand filtering tank and a second connecting pipe; the inlet end of the first connecting pipe is communicated with the outlet end of the first pipe section; the outlet end of the second connecting pipe is communicated with the inlet end of the second pipe section; the outlet end of the first connecting pipe is communicated with the inlet end of the sand filtering tank, the inlet end of the second connecting pipe is communicated with the outlet end of the sand filtering tank, and the outlet end of the sand filtering tank is positioned above the inlet end of the sand filtering tank. According to the invention, the first connecting pipe, the sand filtering tank and the second connecting pipe which are sequentially communicated are connected between the first pipe section and the second pipe section, so that sand scale at the front end of the pipe cleaner is effectively filtered in the pipe cleaning operation of the pipe cleaner, the pipe cleaner is prevented from blocking a pipeline due to more and more sand scale, and the pipe cleaning efficiency is effectively improved.

Description

Device for assisting in cleaning pipelines

Technical Field

The invention relates to the technical field of oilfield development, in particular to a device for assisting in cleaning pipelines.

Background

At present, the petroleum transportation between an oil production place and a destination adopts a pipeline transportation mode, and the pipeline transportation mode not only saves the transportation cost, but also is safe and quick. However, since petroleum contains a certain amount of impurities, such as sand, clay and gravel, which are attached to the inner wall of the petroleum pipeline to form a layer of scale, the scale not only increases the internal pressure of the petroleum pipeline, but also corrodes the pipeline to a certain extent, and the scale also affects the transmission speed of the petroleum, the pipeline needs to be cleaned after being used for a long time.

The prior art generally uses a pig to clean the pipeline. During operation, a pipe cleaner is put in from the head end of the pipeline, then the pipeline is pressurized to push the pipe cleaner to move forward to the tail end of the pipeline, and finally the pipe cleaner is taken out from the tail end of the pipeline.

However, in the actual operation process, some parts of some pipelines can store more impurities than other parts, and when a pipe cleaner carries out pipe cleaning operation on the parts with more impurities, the volume of the impurities pushed by the pipe cleaner is rapidly increased along with the gradual increase of the operation distance, so that the pipelines can be quickly blocked, and the pipe cleaning operation cannot be normally carried out.

Disclosure of Invention

The invention provides a device for assisting in cleaning a pipeline, which overcomes the problem that a pipeline cleaner is easy to block in the pipeline in the pipe cleaning operation.

The present invention provides a device for assisting in cleaning a pipeline, the pipeline being cut at a predetermined location to form a first section and a second section, the device comprising: the sand filtering device comprises a first connecting pipe, a sand filtering tank and a second connecting pipe;

the inlet end of the first connecting pipe is used for being communicated with the outlet end of the first pipe section;

the outlet end of the second connecting pipe is communicated with the inlet end of the second pipe section;

the outlet end of the first connecting pipe is communicated with the inlet end of the sand filtering tank, the inlet end of the second connecting pipe is communicated with the outlet end of the sand filtering tank, and the outlet end of the sand filtering tank is positioned above the inlet end of the sand filtering tank.

Optionally, the apparatus further comprises: the valve group, the pressure supply device and the third connecting pipe;

the valve group includes: a first valve disposed at an inlet end of the sand filtration tank;

the outlet end of the pressure supply device is communicated with the inlet end of a third connecting pipe, the third connecting pipe is communicated with the first connecting pipe, and the outlet end of the third connecting pipe is positioned between the first valve and the outlet end of the first connecting pipe.

Optionally, an inlet end of the pressure supply device is communicated with an outlet end of the sand filter tank, and outlet ends of the pressure supply device are respectively communicated with an inlet end of the second connecting pipe and an inlet end of the third connecting pipe;

the valve group also comprises a second valve arranged on the second connecting pipe.

Optionally, the device further comprises a return pipe, wherein the return pipe is communicated with the first connecting pipe and the second connecting pipe;

the return pipe, a part of the first connecting pipe, the sand filtering tank, the pressure supply device and a part of the second connecting pipe form a circulation loop;

the valve group further comprises a third valve arranged on the return pipe and a fourth valve arranged on the first pipe section;

the second valve is disposed at an outlet end of the second connection pipe.

Optionally, the valve group further includes a fifth valve provided in a portion of the first connection pipe for constituting the circulation loop.

Optionally, the sand filter further comprises a buffer tank, wherein the inlet end of the buffer tank is communicated with the outlet end of the sand filter tank, and the outlet end of the buffer tank is communicated with the inlet end of the pressure supply device.

Optionally, the inlet end of the buffer tank is located above the outlet end of the buffer tank.

Optionally, the sand filtering tank comprises a drain outlet, and the drain outlet is arranged at the bottom of the sand filtering tank.

Optionally, the pipe diameters of the first connecting pipe, the second connecting pipe and the return pipe are 100mm-200 mm.

Optionally, the pressure supply device is an electric pressure pump or a cement tanker.

The present invention provides a device for assisting in cleaning a pipeline, the pipeline being cut at a predetermined location to form a first section and a second section, the device comprising: the sand filtering device comprises a first connecting pipe, a sand filtering tank and a second connecting pipe; the inlet end of the first connecting pipe is communicated with the outlet end of the first pipe section; the outlet end of the second connecting pipe is communicated with the inlet end of the second pipe section; the outlet end of the first connecting pipe is communicated with the inlet end of the sand filtering tank, the inlet end of the second connecting pipe is communicated with the outlet end of the sand filtering tank, and the outlet end of the sand filtering tank is positioned above the inlet end of the sand filtering tank. According to the invention, the first connecting pipe, the sand filtering tank and the second connecting pipe which are sequentially communicated are connected between the first pipe section and the second pipe section, so that when the pipe cleaner cleans the first pipe section, sand scale at the front end of the pipe cleaner is pushed to the first connecting pipe and enters the sand filtering tank under the pushing of external conveying pressure, impurities in the sand scale are filtered and settled in the sand filtering tank, and filtered liquid is fed into the second pipe section through the second connecting pipe, so that the sand scale at the front end of the pipe cleaner is effectively filtered in the pipe cleaning operation, the pipe is prevented from being blocked by more and more sand scales pushed by the pipe cleaner, and the pipe cleaning efficiency is effectively improved.

The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a structure for assisting in cleaning a pipeline according to an embodiment;

FIG. 2 is a schematic structural diagram of the second embodiment for assisting in cleaning the pipeline;

fig. 3 is a schematic structural diagram of the third embodiment for assisting in cleaning the pipeline.

Description of reference numerals:

1 — a first tube section;

101-blind flange;

2-a second pipe section;

3-a first connecting pipe;

4-sand filtering tank;

41-a sewage draining outlet;

5-a second connecting pipe;

6-a pressure supply device;

7-third connecting pipe;

8-a first valve;

9-a second valve;

10-a buffer tank;

11-a return pipe;

12-a third valve;

13-fourth valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

Fig. 1 is a schematic structural diagram of an apparatus for assisting in cleaning a pipeline according to an embodiment of the present invention.

As shown in fig. 1, the present embodiment provides an apparatus for assisting in cleaning a pipeline, which is cut away at a predetermined position to form a first pipe section 1 and a second pipe section 2, the apparatus comprising: a first connecting pipe 3, a sand filtering tank 4 and a second connecting pipe 5; wherein, the inlet end of the first connecting pipe 3 is used for communicating with the outlet end of the first pipe section 1; the outlet end of the second connecting pipe 5 is communicated with the inlet end of the second pipe section 2; the outlet end of the first connecting pipe 3 is communicated with the inlet end of the sand filtering tank 4, the inlet end of the second connecting pipe 5 is communicated with the outlet end of the sand filtering tank 4, and the outlet end of the sand filtering tank 4 is positioned above the inlet end of the sand filtering tank 4.

Specifically, in order to avoid the blocking of the pipeline cleaner by impurities in the process of cleaning the pipeline, in the embodiment, a part of the pipeline is cut off near the first pipe section 1 with more sand and dirt in the pipeline, and the pipeline is cut off at a preset position to form the first pipe section 1 and the second pipe section 2, wherein the pipeline with the length of 7m-10m can be cut off near the position with more sand and dirt in the pipeline, so that the installation of the device of the embodiment is facilitated, and the sand filtering effect is ensured. Of course, in practical applications, the pipeline may be cut at other suitable positions to form the first pipe segment 1 and the second pipe segment 2.

The first connecting pipe 3, the sand filtering tank 4 and the second connecting pipe 5 of the embodiment are arranged between the first pipe section 1 and the second pipe section 2, and the first pipe section 1, the first connecting pipe 3, the sand filtering tank 4, the second connecting pipe 5 and the second pipe section 2 are sequentially communicated, so that the device of the embodiment replaces a part of pipelines cut off from the pipeline, the infusion pipeline and the device of the embodiment form a circulation passage, and liquid flowing out from the upstream of the pipeline can enter the downstream of the pipeline through the first connecting pipe 3, the sand filtering tank 4 and the second connecting pipe 5 of the embodiment.

Specifically, in the pipe cleaning operation, a pipe cleaner is placed at the head end (namely, the end A in fig. 1) of a first pipe section 1, the external conveying pressure of the head end is started, the pipe cleaner pushes sand scale in the first pipe section 1 to move forwards under the action of the external conveying pressure, the sand scale is pushed to a first connecting pipe 3 and then enters a sand filtering tank 4, impurities in the sand scale are precipitated in the sand filtering tank 4, and a filtered liquid part enters a second connecting pipe 5 through the outlet end of the sand filtering tank 4 and is conveyed to the tail end (namely, the end B in fig. 1) of a pipeline through a second pipe section 2; the pipe cleaner constantly promotes the grime in the first pipeline section 1 and moves forward, and when this pipe cleaner arrived the end of first pipeline section 1 promptly first pipeline section 1 and first connecting pipe 3 junction, the head end of pipeline stops outer defeated pressure, takes out the pipe cleaner from the end of first pipeline section 1, accomplishes the clearance of the more first pipeline section 1 of grime.

Wherein, because sand filtration jar 4's effect is subsides the internal sand and scale of inflow jar, consequently sand filtration jar 4's exit end need be located the top of sand filtration jar 4's entrance point for the sand and scale that gets into in sand filtration jar 4 has sufficient time and space to carry out the subside of impurity, has ensured the effective filtration of the sand and scale that gets into in sand filtration jar 4, and make the liquid part on upper strata get into in second connecting pipe 5 smoothly through the exit end of sand filtration jar 4, and through the end of second pipeline section 2 flow to the pipeline. The sand filtering tank 4 realizes the centralized collection of sand and scale in the pipe cleaning process, is convenient to process, and reduces the workload of collecting sand and scale after multiple parts are blocked.

The blind flange 101 may be disposed at the end of the first pipe segment 1, so as to facilitate the closing of the end of the first pipe segment 1 and the taking out of the pig.

This embodiment is through communicateing first connecting pipe 3 in proper order between first pipeline section 1 and second pipeline section 2, sand filtering tank 4 and second connecting pipe 5, so that the pig is when clearing up first pipeline section 1 that easily blocks up, will be located the sand and dirt of pig front end under the promotion of defeated pressure outward and push away to first connecting pipe 3, and enter sand filtering tank 4, make the impurity in the sand and dirt filter and subside in sand filtering tank 4, liquid after the filtration carries out in second pipeline section 2 through second connecting pipe 5, thereby make the pig in the operation of dredging pipe, impurity in the sand and dirt of its front end obtains effectual filtration, compare in current pipe cleaning in-process, the pig directly pushes away the end of pipeline from the head end of pipeline with the sand and dirt, this embodiment can reduce the emergence probability of the pipe cleaning in-process sand and dirt jam condition, effectual pipe cleaning efficiency that has promoted. It is easy to understand that if the part which is easy to scale is positioned below fixed objects such as farmlands or houses, the loss of local villagers caused by digging and cutting pipelines can be avoided by adopting the scheme of the embodiment; or if the part easy to scale is positioned below rivers and lakes, the pollution to the water environment can be avoided when the pipeline cleaner is blocked and has to be broken in the pipeline.

During concrete implementation, generally select the device of this embodiment in spacious wasteland or convenient to transport's position, make things convenient for the transportation and the device of impurity to dismantle and install, cause environmental pollution because of the leakage of pollutant when avoiding cutting the pipe and installing the device of this embodiment simultaneously.

The first connecting pipe 3 and the second connecting pipe 5 in the embodiment can directly adopt metal pipelines, the pipe diameters of the first connecting pipe 3 and the second connecting pipe 5 can be set within the range of 100mm-200mm, and on the basis of ensuring effective settlement of impurities in the pipeline cleaning process, the material consumption of the first connecting pipe 3 and the second connecting pipe 5 is reduced, so that the manufacturing cost of the device in the embodiment is reduced. The pipe diameters of the first connecting pipe 3 and the second connecting pipe 5 can be properly adjusted according to the diameters of the pipelines, so that the sand scale in the first pipe section 1 which is easy to block can be smoothly pushed into the device in the cleaning process, and the sedimentation and filtration of the sand scale and the conveying of the liquid part are completed.

Wherein, all can adopt flange joint between first connecting pipe 3 and the first pipeline section 1, between second connecting pipe 5 and the second pipeline section 2 and between first connecting pipe 3 and second connecting pipe 5 and sand filtering tank 4, make the assembly between the device of this embodiment and the pipeline more convenient like this. Meanwhile, in order to ensure the sealing performance of the whole device, a rubber ring can be padded at the joint of each pipeline.

The sand filtration tank 4 in this embodiment may include a drain 41, and the drain 41 is disposed at the bottom of the sand filtration tank 4.

Specifically, set up drain 41 in the bottom of sand filtering tank 4, can be under the too much condition of pollutant or impurity, directly discharge impurity or pollutant through drain 41, need not to dismantle whole sand filtering tank 4 and get off the clearance of carrying out impurity or pollutant, improved sand filtering tank 4's clear jar efficiency to the sand filtering efficiency of whole device has been improved. Wherein, a valve can be arranged on the sewage draining outlet 41, which is convenient for removing impurities in the sand filtering tank 4.

In particular, the volume of the sand filtering tank 4 can be set to be more than 30 cubic meters, so that the sand filtering tank 4 can have enough space for precipitating impurities in oil sludge.

Example two

Fig. 2 is a schematic structural diagram of the device for assisting in cleaning the pipeline according to the second embodiment.

As shown in fig. 2, on the basis of the first embodiment, the apparatus for auxiliary cleaning of a pipeline provided in this embodiment further includes a valve set, a pressure supply device 6, and a third connection pipe 7; wherein, the valve group includes: a first valve 8 arranged at the inlet end of the sand filter tank 4; the outlet end of the pressure supply device 6 is communicated with the inlet end of a third connecting pipe 7, the third connecting pipe 7 is communicated with the first connecting pipe 3, and the outlet end of the third connecting pipe 7 is positioned between the first valve 8 and the outlet end of the first connecting pipe 3.

Specifically, the concrete process that the pig cleared up the grime in to first pipeline section 1 is constantly to propelling in first connecting pipe 3 with the grime in first pipeline section 1 under the promotion of outer defeated pressure, then subsides the filtration to the impurity in the grime in the sand filtration jar 4, and the liquid part that will cross the filtration carries to second pipeline section 2 in through second connecting pipe 5, when the pig removed the end to first pipeline section 1, takes out the pig, accomplishes the clearance of silt particle in first pipeline section 1 promptly. If the silt particle in the first pipe section 1 is too much, the pipe cleaner pushes the silt particle to move forward, the silt particle is accumulated too much to block the first pipe section 1, and the pipe cleaner is blocked in the first pipe section 1 and cannot continue to push forward, so that normal pipe cleaning work is influenced.

In order to solve the above problem, the present embodiment is provided with the pressure supply device 6, the outlet end of the pressure supply device 6 is communicated with the third connecting pipe 7, the first valve 8 is arranged at the inlet end of the sand filtering tank 4, and the outlet end of the third connecting pipe 7 is communicated between the first connecting pipe 3 and the first valve 8. Through supply to press device 6 with the cleaning solution through the third connecting pipe 7 reverse squeeze into first connecting pipe 3 and first pipeline section 1 in, carry out reverse pressure to the sand and dirt in first pipeline section 1 for the silt particle in the first pipeline section 1 can be dredged, thereby makes the dredging pipe ware continue to advance, carries out normal dredging work.

The specific blockage removal process of this embodiment is: the first end of the first pipe section 1 stops outward transportation, and the first valve 8 is closed so as to temporarily stop the pipe cleaning operation of the pipe cleaner and the sand filtering operation of the auxiliary pipe cleaning device in the embodiment; and starting the pressure supply device 6, and pumping cleaning solution into the first connecting pipe 3 and the first pipe section 1 through the third connecting pipe 7 to wash away sand scale in the first pipe section 1 until the sand scale is completely dredged, so that the blockage removal work is completed. After the blockage removal is finished, closing the pressure supply device 6, opening the first valve 8, and starting the external delivery pump at the head end of the first pipe section 1 to continuously push the pipe cleaner to advance so as to carry out pipe cleaning operation; and performing reciprocating operation of pipe cleaning operation and blockage removing operation until the pipe cleaner is taken out from the tail end of the first pipe section 1, and cleaning the first pipe section 1.

Wherein, the pressure supply device 6 can be an electric pressure pump or a cement pump truck. Specifically, the electric pressure pump can be used for providing pressure according to the actual conditions of the operation site, and for example, the electric pressure pump can be in the form of arranging a generator and a pressure pump; or, if the operation site is a remote place and the equipment is inconvenient to carry, the pressure can be supplied by directly using the self-propelled cement tank truck, and two cement tank trucks are preferably arranged for ensuring the operation stability.

The pressure supply device 6 and the third connecting pipe 7 are arranged in the embodiment, so that when an upstream pipeline, namely the first pipe section 1 is blocked in the pipe cleaning process, sand and scale in the first connecting pipe 3 and the first pipe section 1 can be reversely pressed, and the purpose of blocking removal is achieved. Compared with the prior art, when the pipe cleaner blocks up in the pipeline section that the sand dirt is more, the staff can only cut the pipe and relieve stifled, because the infusion pipeline can pass through the sensitive areas of environment such as farmland, village, river sometimes again, environmental pollution appears easily at the in-process that cuts the pipe and relieve stifled, if the position of stifled ball then the process of relieving stifled will be more troublesome bottom the river in addition, the device of the supplementary pipeline of clearing up that this embodiment provided relieves stifled simple and easy to do, thereby need not to amputate the pipeline when the pipe cleaner is blockked up, just then avoided because the environmental pollution that the pipe cutting operation caused.

As shown in fig. 2, in a specific implementation of this embodiment, the inlet end of the pressure supply device 6 may be directly communicated with the outlet end of the sand filtering tank 4, and the outlet end of the pressure supply device 6 is respectively communicated with the inlet end of the second connecting pipe 5 and the inlet end of the third connecting pipe 7; in addition, the valve set further includes a second valve 9 disposed on the second connection pipe 5.

The normal pigging process of this embodiment specifically is: putting a pipe cleaner at the head end of the first pipe section 1, starting the external pressure of the head end, opening the first valve 8 and the second valve 9, pushing the oil sludge sand in the first pipe section 1 to move forwards by the pipe cleaner under the action of the external pressure, pushing the oil sludge sand to the first connecting pipe 3, then entering the sand filtering tank 4, precipitating the sand in the oil sludge sand in the sand filtering tank 4, and then enabling the liquid part to enter the second connecting pipe 5 through the pressure supply device 6 and be conveyed to the tail end of the pipeline through the second pipe section 2; the pig promotes the oil sludge sand in the first pipeline section 1 and moves forward, and when this pig arrived the end of first pipeline section 1 promptly first pipeline section 1 and first connecting pipe 3 junction, the head end of pipeline stopped outer defeated pressure, took out the pig from the end of first pipeline section 1, accomplished the clearance of the more first pipeline section 1 of impurity.

In normal dredging process, this embodiment is squeezed into in the second connecting pipe 5 through supplying the clean liquid after pressing device 8 with filtering in sand filtering tank 4 to carry to the end of pipeline through second pipeline section 2, on guaranteeing that the dredging in-process carries out effectual filterable basis to the grime of dredging pipe ware front end, improved the conveying efficiency of liquid in sand filtering tank 4, and then improved the sand filtering efficiency that is used for assisting the device of clearing up the pipeline of this embodiment.

If the mud and sand in the first pipe section 1 are more, the pipe cleaner is blocked in the first pipe section 1 and cannot continue to advance, the head end of the pipeline stops output, the first valve 8 and the second valve 9 are closed simultaneously, the pressure supply device 6 is started, liquid in the sand filtering tank 4 is reversely pumped into the first connecting pipe 3 and the first pipe section 1 through the third connecting pipe 7, sand and scale in the first pipe section 1 is washed away until the sand and scale is dredged, and blockage removal operation is completed. After the blockage removal is finished, opening the first valve 8 and the second valve 9, starting the head end external delivery pump, and continuously pushing the pipe cleaner to advance under the action of external delivery pressure; this is repeated until the pig is removed from the end of the first pipe section 1.

In the device for assisting clearance pipeline of this embodiment, supply to press device 6 to directly utilize the clean liquid after 4 filters of sand filtration jar to reversely suppress first pipeline section 1 to reach the effect of deblocking, not only improved the deblocking efficiency of this embodiment, saved reverse cost of suppressing moreover. Wherein, the setting of second valve 9 has realized the switching of normal dredging pipe and unblock operation.

It should be appreciated that although the above description has only described reverse pressurisation to clean the first pipe section 1 when the pig becomes jammed in the first pipe section 1, in some examples, the reverse pressurisation cleaning may be performed on a timed or sporadic basis.

This embodiment sets up and supplies pressure device 6, third connecting pipe 7 and valve group, can carry out reverse pressurization to the pipeline and wash, can fall the silt particle clearance that blocks up the dredging pipe ware, guarantees going on smoothly of dredging pipe work, simultaneously, just also need not just like prior art and promotes the dredging pipe ware through constantly increasing pressure and gos forward, just so can reduce the too high damage to the pipeline of pressure.

In this embodiment, the pressure of the first connection pipe 3 and the third connection pipe 7 is greater than the pressure of the pipeline. Specifically, when the sand and scale in first pipeline section 1 is more and make the dredging pipe ware stifled unable removal in first pipeline section 1, need relieve stifled through the mode of reverse suppress, exert pressure through supplying to press device 6 to the clean liquid in the sand filtration jar 4 promptly, make clean liquid squeeze into first pipeline section 1 through third connecting pipe 7 and first connecting pipe 3 in, consequently first connecting pipe 3 and third connecting pipe 7 need have certain bearing capacity, avoid causing the damage to the pipeline in this embodiment at the in-process that washes the suppress, the influence relieves stifled effect.

In order to improve the blockage removing effect, the present embodiment further includes a buffer tank 10, wherein an inlet end of the buffer tank 10 is communicated with an outlet end of the sand filtering tank 4, and an outlet end of the buffer tank 10 is communicated with an inlet end of the pressure supply device 6.

Specifically, this embodiment will strain in the sand filtering tank 4 in the liquid part of crossing off carry to the buffer tank 10 in, store a certain amount of clean liquid in the buffer tank 10, when making take place to block up in first pipeline section 1, supply to press device 6 to take out clean liquid of sufficient volume and carry out reverse pressure to first pipeline section 1 and wash, the effectual reverse effect of pressing that has improved, and then guaranteed the normal propulsion of dredging pipe ware, and also can avoid the silt particle in the sand filtering tank 4 to enter into and supply to press in the device 6 when supplying to press device 6 during operation.

Wherein, the inlet end of the buffer tank 10 is positioned above the outlet end of the buffer tank 10, so that the storage capacity of the buffer tank 10 is increased, and the blockage removing effect is further improved. To ensure that the liquid contained in the buffer tank 10 can meet the need of back flushing, the volume of the buffer tank 10 can be set to be more than 30 cubic meters by calculation and practice. In addition, the buffer tank 10 may be formed by welding a plurality of steel plates, and the structure of the buffer tank 10 may be a rectangular parallelepiped or a cylinder. The buffer tank 10 can also be directly used as a tank body which is idle in the construction site.

Other technical features are the same as those of the first embodiment and can bring about the same or similar technical effects, and are not repeated herein, and specific reference may be made to the description of the first embodiment.

EXAMPLE III

Fig. 3 is a schematic structural diagram of the device for assisting in cleaning the pipeline provided in the third embodiment.

As shown in fig. 3, on the basis of the second embodiment, the present embodiment further includes a return pipe 11, and the return pipe 11 is communicated with the first connecting pipe 3 and the second connecting pipe 5; the return pipe 11, a part of the first connecting pipe 3, the sand filtering tank 4, the pressure supply device 6 and a part of the second connecting pipe 5 form a circulation loop; the valve group also comprises a third valve 12 arranged on the return pipe 11 and a fourth valve 13 arranged on the first pipe section 1; a second valve 9 is provided at the outlet end of the second connection pipe 5.

Specifically, for reducing manufacturing cost, generally with first connecting pipe 3 in this embodiment, the pipe diameter design of second connecting pipe 5 and back flow 11 is for being less than the pipe diameter of pipeline far away, consequently, when the sand dirt that the pig promoted in the first pipeline section 1 got into first connecting pipe 3, because the reducing reason very easily leads to the silt particle jam in first connecting pipe 3, make the pig unable removal, and when first connecting pipe 3 blockked up, directly carry out the effective mediation to the silt particle in first connecting pipe 3 through pressure supply device 6 and the third connecting pipe in embodiment two and suppress.

In order to solve the above problem, in the present embodiment, the return pipe 11 is communicated between the first connection pipe 3 and the second connection pipe 5, the clean liquid in the sand filtering tank 4 is pumped into the second connection pipe 5 through the pressure supply device 6, and the circulation loop formed by the return pipe 11, a part of the first connection pipe 3, the sand filtering tank 4, the pressure supply device 6 and a part of the second connection pipe 5 is continuously flushed and filtered, so that the sand and mud at the blockage position in the first connection pipe 3 are dredged, thereby ensuring the normal operation of the device for auxiliary cleaning of pipelines of the present embodiment.

In this embodiment, when the first connection pipe 3 is specifically dredged, the operation of the external transfer pump at the head end of the first pipe section 1 is first stopped, the fourth valve 13 and the second valve 9 are closed to temporarily stop the transfer of the liquid, and the first valve 8 and the third valve 12 are opened to conduct the circulation loop formed by the return pipe 11, a part of the first connection pipe 3, the sand filter tank 4, the pressure supply device 6, and a part of the second connection pipe 5; the pressure supply device 6 is started, clean liquid in the sand filtering tank 4 is squeezed into the second connecting pipe 5, the clean liquid enters a part of pipe sections of the first connecting pipe 3 through the return pipe 11, sand scale in the first connecting pipe 3 is washed into the sand filtering tank 4 by the clean liquid, the sand scale in the first connecting pipe 3 in the sand filtering tank 4 is settled and filtered, the filtered liquid part continues to be squeezed into the second connecting pipe 5 through the pressure supply device 6, and the circulation is carried out until the silt in the first connecting pipe 3 is dredged.

After the first connecting pipe 3 is dredged, the third valve 12 is closed, the first valve 8, the second valve 9 and the fourth valve 13 are opened, the external delivery pump at the head end of the first pipe section 1 is started, the pipe cleaner is continuously pushed to move forward, pipe cleaning operation is carried out until the pipe cleaner is taken out from the tail end of the first pipe section 1, and cleaning of the first pipe section 1 is completed.

This embodiment is through setting up back flow 11 between first connecting pipe 3 and second connecting pipe 5, so that back flow 11, a part of first connecting pipe 3, sand filtering tank 4, supply a part formation circulation circuit of pressure device 6 and second connecting pipe 5, when leading to the sand dirt to block up first connecting pipe 3 because of the reducing problem, this embodiment directly utilizes clean liquid in the sand filtering tank 4 to wash repeatedly the silt particle in the circulation circuit and subside of impurity in the sand dirt, make the sand dirt of jam department can dredge in the first connecting pipe 3, and then the sand filtering efficiency of the device of this embodiment has been improved, the pigging efficiency has been promoted. In addition, circulation circuit's setting in this embodiment has not only realized the mediation of first connecting pipe 3, and the structure is also comparatively simple, has further reduced the pigging cost.

Wherein, a fourth valve 13 is arranged on the first pipe section 1, so that the present embodiment can control the circulation of the liquid in the first pipe section 1 by opening and closing the fourth valve 13. This embodiment is through closing fourth valve 13 to the circulation of the liquid in intercepting first pipeline section 1 for it is more convenient to connect the device of this embodiment or get the operation of dredging the pipe ware at the end of first pipeline section 1 between first pipeline section 1 and second pipeline section 2, and can effectually prevent that the liquid in the pipeline from leaking, avoids causing the pollution to the environment.

This embodiment is to the back of the silt particle clearance in the first pipeline section 1, when carrying out the clearance of second pipe end 12, can close first valve 8 earlier, open fourth valve 13, third valve 12 and second valve 9, then put into the head end of second pipeline section 2 with the pig, open the defeated pump outward of the head end of first pipeline section 1, defeated pressure outward is through first pipeline section 1, the partial pipeline section of first connecting pipe 3, the partial pipeline section promotion of back flow 11 and second connecting pipe 5 is moved forward, make the pig clear up the silt particle in the second pipeline section 2, until the pig takes out from the end of second pipeline section 2, accomplish the clearance of second pipeline section 2 promptly.

The diameter of the return pipe 11 in this embodiment can be consistent with the diameters of the first connecting pipe 3 and the second connecting pipe 5, and both are set between 100mm and 200 mm.

In this embodiment, the pressure of the first connection pipe 3, the second connection pipe 5 and the return pipe 11 is greater than the pressure of the pipeline. Specifically, when the amount of sand and mud in the first connecting pipe 3 is large and the pig is blocked in the first pipe section 1, the pig needs to be unblocked by flushing the circulation loop, that is, pressure is applied to the clean liquid in the sand filter tank 4 through the pressure supply device 6, so that the clean liquid is pumped into a part of the second connecting pipe 5, the return pipe 11, a part of the first connecting pipe 3, the sand filter tank 4 and the circulation loop formed by the pressure supply device 6 are flushed and settled for many times, therefore, the first connecting pipe 3, the second connecting pipe 5 and the return pipe 11 need to have certain pressure bearing capacity, thereby avoiding damage to the pipeline in the embodiment in the flushing and pressurizing process and affecting the unblocking effect.

The present embodiment also comprises a fifth valve 14 arranged in the part of the first connecting pipe 3 intended to constitute the circulation loop. The fifth valve 14 is arranged to control the sand in the first pipe section 1 to enter the sand filtering tank 4 at any time and to control the communication of the circulation loop.

As shown in fig. 3, the present embodiment may further include a buffer tank 10, an inlet end of the buffer tank 10 is communicated with an outlet end of the sand filtering tank 4, an outlet end of the buffer tank 10 is communicated with an inlet end of the pressure supply device 6, and a part of the second connecting pipe 5, the return pipe 11, a part of the first connecting pipe 3, the sand filtering tank 4, the buffer tank 10, and the pressure supply device 6 together form a circulation loop. In this embodiment carries the liquid part of straining the interior filteration of sand filtering tank 4 to buffer tank 10, stores a certain amount of clean liquid in buffer tank 10 for when taking place to block up in first connecting pipe 3, supply pressure equipment 6 to take out clean liquid of sufficient volume and wash in circulation circuit, effectively improved dredging efficiency. Specific features of the buffer tank 10 can be referred to the description of the second embodiment, and are not repeated herein.

Other technical features are the same as those of the first embodiment or the second embodiment, and can bring about the same or similar technical effects, and are not described herein again, and specific reference may be made to the description of the first embodiment or the second embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for assisting in cleaning a pipeline which is cut away at a predetermined location to form a first section and a second section, the apparatus comprising: the sand filtering device comprises a first connecting pipe, a sand filtering tank and a second connecting pipe;

2. The apparatus of claim 1, further comprising: the valve group, the pressure supply device and the third connecting pipe;

3. The apparatus of claim 2, wherein the inlet end of the pressure supply device is in communication with the outlet end of the sand filter tank, and the outlet end of the pressure supply device is in communication with the inlet ends of the second and third connecting pipes, respectively;

4. The apparatus of claim 3, further comprising a return conduit in communication with the first and second connecting conduits;

the second valve is disposed at an outlet end of the second connection pipe.

5. The apparatus of claim 4, wherein the valve block further comprises a fifth valve disposed on the portion of the first connecting tube for constituting the circulation loop.

6. The apparatus of any one of claims 3 to 5, further comprising a surge tank, an inlet end of the surge tank being in communication with an outlet end of the sand screen tank, an outlet end of the surge tank being in communication with an inlet end of the pressure supply device.

7. The apparatus of claim 6, wherein the inlet end of the surge tank is located above the outlet end of the surge tank.

8. The apparatus of any one of claims 1 to 5, wherein the sand filtration tank comprises a drain outlet disposed at a bottom of the sand filtration tank.

9. A device according to claim 4 or 5, characterised in that the first connecting pipe, the second connecting pipe and the return pipe have a pipe diameter of 100mm-200 mm.

10. The apparatus according to any one of claims 2 to 5, wherein the pressure supply device is an electric pressure pump or a cement tanker.