Pipeline cleaning tool

Abstract

The utility model relates to oil field pipeline dredging and cleaning equipment, in particular to a pipeline cleaning tool. The pipeline cleaning tool comprises a center column, front blades and rear blades which are staggered with each other are arranged on the center column at intervals, the rear blades are movably installed on the center column in the front-back direction, and elastic supporting pieces are installed between the front blades and the rear blades in an abutting mode. The elastic supporting piece is arranged between the front blade and the rear blade, the elastic supporting piece can be compressed by the front blade and the rear blade in the working process, the resistance of the blades to water flow is increased, the pressure in the pipeline suddenly becomes high, at the moment, the elastic supporting piece releases compression stress, and jarring and collision can be generated in the pipeline; the problem that the tool is stuck in the pipeline when the pipeline is seriously blocked is avoided, and the pipeline cleaning tool is simple in structure, has a good scraping and cleaning effect, improves the cleaning effect and the cleaning efficiency, and effectively prevents the blockage phenomenon at the same time.

Description

Technical Field

[0001] The utility model relates to an oilfield pipeline dredging and cleaning device, in particular to a pipeline cleaning tool. Background Art

[0002] During the high-efficiency development stage of high-sulfur gas fields, when high-sulfur natural gas flows in gathering pipelines, the pressure and temperature gradually decrease, and the elemental sulfur in the natural gas will gradually crystallize from the gas phase into the solid phase. After long-term use, more and more elemental sulfur precipitates, and thus adheres and deposits in the pipeline, which will cause an increase in pipeline pressure difference and a decrease in gathering and transportation efficiency. In order to maintain a certain transmission efficiency, it is necessary to unclog the pipeline.

[0003] At present, the commonly used methods for unclogging high-sulfur gathering pipelines are chemical unclogging methods and physical unclogging methods.

[0004] The chemical unclogging method mainly uses the injection of chemical agents for soaking and cleaning. This unclogging method has the disadvantages of incomplete unclogging, short effective time, high cost, and long-term use will corrode the pipeline and cause pipeline leakage.

[0005] Physical unclogging mainly uses a cavitation jet cleaner. The Chinese utility model patent with the authorization announcement number CN200948462Y discloses a cavitation vibration cleaner, which includes two bowl-shaped blades, a connecting shaft and a gasket. The connecting shaft is provided with shoulders at both ends. The two blades are installed on the connecting shaft in the same direction and staggered and lean against the corresponding shoulders. The blades are pressed and connected together with the connecting shaft by the gasket through a connecting bolt. When the cleaner is used, it is placed in the pipeline and quickly moves forward under the push of a fluid with appropriate pressure. Due to the blockage of the scale, when the fluid passes through the narrow gap between the front and rear blades, it suddenly accelerates, and at the same time generates a rapidly rotating eddy current, forming a large number of bubbles, and instantaneously exciting a strong micro-vibration wave, which generates a very strong impact on the pipeline to achieve the cleaning effect.

[0006] During the use process, due to the certain fluid pressure, when the fluid passes through the narrow gap between the front and rear blades, the thrust on the cleaner remains unchanged. When the dirt is thick, the resistance of the scale to the cleaner increases. When the thrust of the fluid on the cleaner is less than the resistance of the scale to the cleaner, the fluid flows downstream through the blade gap and relieves pressure, which is likely to cause blockage and affect the cleaning effect. Utility Model Content

[0007] The purpose of the utility model is to provide a pipeline cleaning tool to solve the problem that the existing cavitation vibration cleaner is prone to blockage when encountering thick scale.

[0008] To solve the above problems, the pipeline cleaning tool of the utility model adopts the following technical solutions:

[0009] A pipeline cleaning tool includes a central column, on which front blades and rear blades are spaced and staggered. The rear blades are movably mounted on the central column in the front-rear direction, and an elastic support member is mounted between the front blades and the rear blades.

[0010] Furthermore, the elastic support member is a spiral spring sleeved on the central column.

[0011] Furthermore, a front blade fixing ring is provided on the central column, and the front blade fixing ring is pressed and fixed by the front end of the spiral spring.

[0012] Furthermore, a front blade limiting disc is provided at the front end of the central column, and the front blade fixing ring presses the front blade against the front blade limiting disc.

[0013] Furthermore, a rear blade fixing ring is provided at the rear end of the central column, and the rear blade is pushed against the rear blade fixing ring by the rear end of the spiral spring.

[0014] Furthermore, the rear blade fixing ring is threadedly connected or welded to the central column to ensure the fixed connection between the fixing ring and the end of the central column.

[0015] Furthermore, both the front blades and the rear blades include more than two blade claws, and scraping teeth are provided on the blade claws of the front blades and / or the rear blades.

[0016] Furthermore, the shape of the scraping teeth is serrated, which increases the contact force with the scale and enhances the scraping effect.

[0017] Furthermore, the blade claws are arc-shaped blade claws, and there is an arc transition between the root and the end of the blade claws. When the spiral spring is compressed to the minimum, the front and rear blades fit more closely.

[0018] Furthermore, the width of the blade claws is not less than 4 / 5 of the maximum distance between adjacent blade claws. When the front and rear blades fit, the flow area of the water flow can be greatly reduced, thereby increasing the hydraulic thrust on the tool and enhancing the thrust and scraping effect of the tool on the scale in front.

[0019] Advantages of the present utility model: The present utility model is an improvement on the existing pipeline cleaning tools. By utilizing the "cavitation effect" principle in fluid mechanics, powerful micro-jet flows and shock waves are generated during the pipeline cleaning process, thereby removing the dirt in the pipeline. At the same time, when the dirt in the pipeline is thick, the front blade is subjected to a large resistance. At this time, the rear blade will move forward under the push of the hydraulic force, overcoming the elastic force of the elastic support member. The front blade and the rear blade will continuously approach each other under the action of the front resistance and the rear hydraulic force, and the front and rear blades will partially overlap, reducing the flow area of the water flow. The resistance of the blade to the water flow will increase, thereby further increasing the thrust of the water flow on the tool, and further enhancing the thrust and scraping effect of the pipeline cleaning tool on the front dirt. When the elastic support member is compressed to the limit, the distance between the front and rear blades is the shortest, the flow area is the smallest, the resistance of the blade to the water flow is the largest, and the pressure in the pipeline suddenly rises. At this time, the elastic support member releases the compressive stress, which can generate shock impacts in the pipeline, avoiding the problem that the tool will get stuck in the pipeline when the blockage in the pipeline is severe. Description of the Drawings

[0020] Figure 1 is a perspective view of the pipeline cleaning tool of the present utility model;

[0021] Figure 2 is a sectional view of the pipeline cleaning tool of the present utility model;

[0022] Figure 3 is a rear view of the pipeline cleaning tool of the present utility model;

[0023] Figure 4 is an enlarged view of the scraping teeth of the pipeline cleaning tool of the present utility model.

[0024] Description of the reference numerals: 1, central column; 11, front limit disk of the central column; 12, front blade fixing ring; 13, rear blade limit ring; 14, root of the blade claw of the front blade; 15, end of the blade claw of the front blade; 2, front blade; 21, scraping teeth; 3, rear blade; 4, helical spring; 5, limit groove. Detailed Embodiments

[0025] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0026] The principle of the solution of the present utility model is as follows:

[0027] The pipeline cleaning tool provided by the present utility model is applied to the interior of gathering and transportation pipelines such as petroleum and natural gas, to remove the sediments attached to the interior of the pipeline, prevent the pipeline from being blocked by the internal sediments, and ensure the transmission efficiency of the pipeline.

[0028] The cleaning tool in the prior art includes two blades, a connecting shaft and a gasket. The two blades are connected by the connecting shaft, and a gasket is arranged at the connection between the blade and the connecting shaft to tightly connect the blade and the connecting shaft through a connecting bolt and the gasket. The cleaning tool in the prior art is placed in a pipeline during use and moves forward quickly under the push of appropriate pressure fluid. During cleaning, dirt blocks the cleaning tool. When the fluid passes through the narrow gap between the front and rear blades, the flow rate will suddenly increase, and at the same time, a rapidly rotating eddy current is generated, forming a large number of bubbles, and instantaneously exciting a powerful micro-vibration wave, which generates a very strong impact on the pipeline to achieve the cleaning effect; however, when such a cleaning tool is in use, the pressure of the fluid is constant, and the thrust of the fluid on the cleaning tool is unchanged. When the dirt is thick, the resistance of the dirt to the cleaning tool will increase. When the thrust of the fluid on the cleaning tool is less than the resistance of the dirt to the cleaning tool, the fluid will flow downstream through the gap of the blade and relieve pressure, and the cleaning tool will be blocked by the dirt in the pipeline, affecting its normal operation.

[0029] Regarding this technical problem, the utility model is provided with an elastic support between the front and rear blades. When the cleaning tool is blocked by dirt, the elastic support between the two blades will be compressed, so that the distance between the two blades is shortened, the flow area of the fluid will become smaller, and the thrust of the fluid on the cleaning tool will continuously increase until the thrust of the fluid on the cleaning tool is greater than the resistance of the dirt to the cleaning tool, and the cleaning tool will remove the dirt under the action of the fluid thrust; when the dirt in the pipe is too large, the elastic support is compressed to the limit, the distance between the front and rear blades is the shortest, and the flow area of the fluid is the smallest, which will cause the pressure in the pipe to suddenly rise. At this time, the elastic support releases the compressive stress and generates a shock impact in the pipeline, avoiding the problem that the tool is blocked in the pipeline when the blockage is serious.

[0030] Based on the above scheme principle, Embodiment 1 of the utility model is as follows:

[0031] As Figure 1 、 2As shown in the figure, the pipeline cleaning tool includes a central column 1, a front blade 2 and a rear blade 3. A limiting groove 5 for preventing the front blade 2 and the rear blade 3 from rotating on the central column 1 is provided on the central column 1. The front blade 2 is assembled on the central column 1 and a limiting protrusion (not shown in the figure) matching the shape of the limiting groove 5 is provided at the assembly position with the central column 1. The rear blade 3 is movably mounted on the central column 1 in the front-rear direction, and a limiting protrusion (not shown in the figure) matching the shape of the limiting groove 5 is also provided at the assembly position with the central column 1. The front blade 2 and the rear blade 3 are staggered from each other and are anti-rotationally assembled on the central column 1 so that the included angle between the staggered blades remains fixed during the working process. A front section limiting disc 11 of the central column is further provided at the front end of the central column 1, and the front end of the front blade 2 is blocked by the front section limiting disc 11 of the central column to prevent it from disengaging from the central column 1. A front blade fixing ring 12 is also provided on the central column 1, and the front blade 2 is clamped and fixed on the central column 1 by the front section limiting disc 11 of the central column and the front blade fixing ring 12. A rear blade fixing ring 13 is further provided at the rear end of the central column 1 to prevent the rear blade 3 from disengaging from the rear end of the central column 1. The rear blade fixing ring 13 is threadedly connected to the central column 1.

[0032] As Figure 1 , 2 shown in the figure, an elastic support member is also sleeved on the central column 1. The elastic support member is located between the front blade 2 and the rear blade 3. The front end of the elastic support member presses against the front blade fixing ring 12, and the rear end of the elastic support member presses the rear blade 3 against the rear blade fixing ring 13.

[0033] In this embodiment, the elastic support member is specifically a helical spring 4. In other embodiments, the elastic support member can also be a corrugated pipe.

[0034] When the pipeline cleaning tool provided by the present utility model is in use, under normal circumstances, the front blade 2 and the rear blade 3 are in a separated state. Driven by the water flow, it plays a normal cavitation effect to remove the dirt in the pipeline. At the same time, the front blade 2 scrapes in the front, and the rear blade 3 scrapes in the rear, and both scrape the inner wall of the pipeline in all directions; As Figure 3As shown, when the dirt in the pipeline is thick, the front blade 2 is subjected to a large resistance. At this time, when the water injection displacement in the pipeline is increased, the rear blade 3 will move forward under the hydraulic force to overcome the elastic force of the elastic support member. The front blade 2 and the rear blade 3 will continuously approach each other under the action of the front resistance and the rear hydraulic force, and the front and rear blades will partially overlap, reducing the flow area of the water flow. The resistance of the blades to the water flow will increase, thereby further increasing the thrust of the water flow on the tool, and further improving the thrust and scraping effect of the pipeline cleaning tool on the front dirt. When the elastic support member is compressed to the limit, the distance between the front and rear blades is the shortest, the flow area is the smallest, and the resistance of the blades to the water flow is the largest. The pressure in the pipeline suddenly rises. At this time, the elastic support member releases the compressive stress, which can generate a shock impact in the pipeline, avoiding the problem that the tool will get stuck in the pipeline when the blockage in the pipeline is serious.

[0035] Further, as a preferred embodiment, the rear blade fixing ring 13 and the central column 1 can also be connected together by welding, so that the connection between the rear blade fixing ring 13 and the central column 1 is more firm.

[0036] Based on the above scheme principle and Embodiment 1, Embodiment 2 of the present invention is as follows:

[0037] On the basis of Embodiment 1, this embodiment is further optimized. As Figure 4 shown, the key point of this embodiment is that both the front blade 2 and the rear blade 3 include more than two blade claws, and scraping teeth 21 are provided on the blade claws of the front blade 2 or the rear blade 3. The scraping teeth 21 are serrated to scrape the dirt in the pipeline.

[0038] Further, as a preferred embodiment, the blade claws are arc-shaped blade claws, and there is an arc transition between the root and the end of the blade claws. When the elastic support member is compressed to the limit, the fit between the front and rear blades will be closer, further compressing the flow area and enhancing the cleaning effect of the cleaning tool.

[0039] Based on the above scheme principle and Embodiments 1 and 2, Embodiment 3 of the casing of the present invention is as follows:

[0040] On the basis of Embodiments 1 and 2, this embodiment is further optimized. The width of the blade claws is not less than 4 / 5 of the maximum distance between adjacent two blade claws, so as to more accurately control the flow area and enable it to produce the expected water blocking effect.

[0041] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present invention should be included in the protection scope of the present invention by the same token.

Claims

1. A pipeline cleaning tool, comprising a central column, on which front blades and rear blades that are staggered from each other are arranged at intervals, characterized in that, The rear blade is movably mounted on the central column in the front-rear direction, and an elastic support member is mounted between the front blade and the rear blade.

2. The pipe cleaning tool according to claim 1, characterized in that, The elastic support member is a coaxial helical spring sleeved on the central column.

3. The pipeline cleaning tool according to claim 2, characterized in that, A front blade fixing ring is provided on the central column, and the front blade fixing ring is pressed and fixed by the front end of the helical spring.

4. The pipeline cleaning tool according to claim 3, characterized in that, A front blade limiting disc is provided at the front end of the central column, and the front blade fixing ring presses the front blade against the front blade limiting disc.

5. The pipe cleaning tool according to claim 2, wherein, A rear blade fixing ring is provided at the rear end of the central column, and the rear blade is abutted against the rear blade fixing ring by the rear end of the helical spring.

6. The pipeline cleaning tool according to claim 5, wherein The rear blade fixing ring is threadedly connected or welded to the central column.

7. The pipeline cleaning tool according to any one of claims 1-4, characterized in that: Both the front blade and the rear blade include more than two blade claws, and scraping teeth are provided on the blade claws of the front blade and / or the rear blade.

8. The pipeline cleaning tool according to claim 7, characterized in that: The shape of the scraping teeth is serrated.

9. The pipe cleaning tool according to claim 7, characterized in that: The blade claws are arc-shaped blade claws, and there is an arc transition between the root and the end of the blade claws.

10. The pipe cleaning tool according to claim 7, characterized in that: The width of the blade claws is not less than 4 / 5 of the maximum distance between adjacent blade claws.

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