CN115121556A

CN115121556A - Cleaning device for oil delivery pipe

Info

Publication number: CN115121556A
Application number: CN202210696091.1A
Authority: CN
Inventors: 杨志杰; 黎章杰; 霍柏年; 杨宇超; 安奕达
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-09-30

Abstract

The application discloses cleaning device of defeated oil pipe. This cleaning device includes: the wax scraping mechanism is used for scraping the wax layer attached to the inner wall of the oil pipeline until the wax layer is separated to form a wax block; a wax melting mechanism for heating and melting the wax block; the wax scraping support mechanism is used for providing support for the wax scraping mechanism on the inner wall of the oil pipe; and the wax melting supporting mechanism is used for providing support for the wax melting mechanism on the inner wall of the oil pipeline. In the technical scheme, the wax scraping, the wax melting and the wax dissolving for cleaning the inner wall of the oil pipeline are integrated. The paraffin removal effect is guaranteed, meanwhile, the working treatment efficiency of the device is improved as much as possible through structural design, and effective treatment and recovery of paraffin resources and smooth oil transportation of a crude oil pipe are achieved.

Description

Cleaning device for oil delivery pipe

Technical Field

The application relates to the technical field of oil pipelines, in particular to a cleaning device for an oil pipeline.

Background

The oil pipeline technology is a technology for carrying out long-distance oil transportation by utilizing an oil pipeline. The oil transportation method has the advantages of high transportation efficiency, low comprehensive cost, high safety guarantee and the like. The crude oil pipeline is built by 12.27 kilometers in China at present, the transportation capacity can reach 1 hundred million tons per year, and therefore crude oil trade in China is greatly promoted, and huge development opportunities are provided for China. However, while the oil pipeline technology brings great development dividends to China, serious problems are increasingly exposed in the aspects of maintenance and continuous durability of the oil pipeline technology.

Data show that 90% of crude oil produced in China annually has a wax content of 10% or more, most of the crude oil has a wax content of about 20%, and even some of the crude oil has a wax content of 40% -50%, so that during transportation in a pipeline, along with temperature and pressure reduction and light alkane substance escape, the phenomenon that the wax content in the crude oil is separated out and attached to the inner wall of the oil pipeline, namely the phenomenon of wax deposition of the oil pipeline, is difficult to avoid.

The wax deposition phenomenon of the oil delivery pipe reduces the available space of the pipeline, reduces the service life, increases the energy consumption of crude oil transportation, and brings great potential safety hazard to pipeline transportation. In the seventies of the twentieth century, the crude oil pipeline technology in China has been greatly developed, and the automatic control of an oil pipeline is improved by adopting an SCADA system, so that the wax precipitation degree and the condensation degree of crude oil are reduced. However, compared with developed countries in Europe and America, the crude oil transportation technology in China is still relatively lagged behind, and particularly, a great gap exists between the energy-saving technology of pipeline maintenance and wax removal treatment and the advanced level of the world. At present, China develops deep research on equipment cleaning at normal temperature of long-distance oil pipelines.

Disclosure of Invention

In view of this, this application provides defeated oil pipe's cleaning device, can the inside wax layer clearance effect of petroleum pipeline.

The application provides a cleaning device of defeated oil pipe includes:

the wax scraping mechanism is used for scraping the wax layer attached to the inner wall of the oil pipeline until the wax layer is separated to form a wax block;

the wax melting mechanism is used for heating and melting the wax block;

the wax scraping support mechanism is used for providing support for the wax scraping mechanism on the inner wall of the oil conveying pipe;

and the wax melting supporting mechanism is used for providing support on the inner wall of the oil conveying pipe for the wax melting mechanism.

Optionally, the wax scraping mechanism includes a scraping blade for scraping the wax layer and a crushing blade for crushing the wax block, the crushing blade is configured to have a spiral-shaped portion and can be rotationally driven, and the crushing blade is disposed on the outer side of the scraping blade in the discharge direction defined by the spiral-shaped portion when rotationally driven.

Optionally, the wax scraping mechanism further comprises a wax bearing flow combiner, and the wax bearing flow combiner is arranged outside the discharging direction of the crushing knife.

Optionally, the wax scraping mechanism further comprises a buffer spacer, and the crushing blade is arranged between the buffer spacer and the scraping blade.

Optionally, the wiper blade is configured with a material guiding portion, which abuts against the crushing blade.

Optionally, the wax melting mechanism includes a heating body for heating and melting the wax block accommodated in the inner cavity of the heating body, and the heating body is provided with a one-way conduction valve communicated with a discharge hole of the heating body.

Optionally, a filter screen is arranged at a position close to the discharge port of the wax melting mechanism.

Optionally, the wax scraping mechanism and the wax melting mechanism are assembled through a rotating shaft connector, the rotating shaft connector comprises a telescopic shaft sleeve and universal rotating shaft joints respectively located at two end portions of the telescopic shaft sleeve, and the universal rotating shaft joints are used for being connected with the wax scraping mechanism and the wax melting mechanism in an installing mode.

Optionally, the wax scraping support mechanism comprises a scissor-type shrinkage frame, one end of the scissor-type shrinkage frame is mounted on the wax scraping, and the other end of the scissor-type shrinkage frame is mounted with a traveling wheel assembly.

Optionally, the wax melting supporting mechanism comprises a supporting rod and a buffer spring sleeved on the supporting rod, and the supporting rod is fixedly connected with a supporting wheel.

The cleaning device integrates the wax scraping, the wax melting and the wax dissolving for cleaning the inner wall of the oil conveying pipe. The paraffin removal effect is guaranteed, meanwhile, the working treatment efficiency of the device is improved as much as possible through structural design, and effective treatment and recovery of paraffin resources and smooth oil transportation of a crude oil pipe are achieved.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is an overall structural diagram of a cleaning apparatus according to an embodiment of the present application.

Fig. 2 is a structural diagram of a wax scraping mechanism provided in an embodiment of the present application.

Fig. 3 is a structural diagram of a wax melting mechanism according to an embodiment of the present application.

Fig. 4 is a structural diagram of a rotating shaft connector according to an embodiment of the present application.

Fig. 5 is a structural diagram of a wax scraping support mechanism according to an embodiment of the present application.

Fig. 6 is a structural diagram of a molten wax support mechanism according to an embodiment of the present application.

Fig. 7 is a structural diagram of an energy supply mechanism provided in an embodiment of the present application.

Fig. 8 is a block diagram of a machine vision mechanism according to an embodiment of the present application.

Wherein the elements in the figures are identified as follows:

20-a wax scraping mechanism; 21-a wiper blade; 22-crushing knife; 23-a wax bearing junction station; 24-a buffer spacer; 25-a motor; 30-a wax melting mechanism; 31-a heating body; 31 a-feed opening; 31 b-a discharge port; 32-a one-way conductance valve; 33-a filter screen; 40-a wax scraping support mechanism; 41-shear type shrinkage frame; 42-a walking wheel assembly; 50-a wax melting support mechanism; 51-a support bar; 52-support wheels; 53-a buffer spring; 60-a spindle connector; 61-telescopic shaft sleeve; 62-universal swivel; 70-an energy supply mechanism; 71-an annular housing; 72-a lithium ion battery; 73-an aluminum cover plate; 74-insulating separator; 80-a machine vision mechanism; 81-Beidou intelligent chip; 82-a speed sensor; 83-laser rangefinder; 84-APD chips; 85-a draft tube.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying that the number of indicated technical features is indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 and 2, the present application provides a cleaning device for an oil pipeline. It is noted that although the subject matter "cleaning device for oil pipes" referred to herein is provided with words "oil pipes", these words are provided with a definition of the object to be cleaned on the surface. However, these words are to be understood as a context of use, which is merely an exemplary illustration and does not constitute a substantial limitation of the cleaning apparatus of the present application. Any other type of object, i.e. a pipeline with a stain-adhering layer, as represented by a wax layer, on the inner wall of the pipeline, can also be applied to the technical scheme of the application. For convenience of description, the oil pipeline is taken as an example hereinafter, and other examples are omitted to avoid brevity.

Based on the above description, the cleaning device of the present application can be widely applied to, for example, sewers, dredging of river channels, and the like. Therefore, the method has a far-reaching significance and a wide application prospect.

The cleaning device comprises:

a wax scraping mechanism 20, for scraping the wax layer adhered to the inner wall of the oil pipeline until the wax layer is separated to form a wax block;

a wax melting mechanism 30 for heating and melting the wax block;

a wax scraping support mechanism 40 for providing support for the wax scraping mechanism 20 on the inner wall of the oil pipe;

and a wax melting support mechanism 50 for providing support for the wax melting mechanism 30 on the inner wall of the oil pipe.

The cleaning device with the structure integrates the wax scraping, the wax melting and the wax dissolving for cleaning the inner wall of the oil conveying pipe during working. The paraffin removal effect is ensured, meanwhile, the working treatment efficiency of the device is improved as much as possible through the structural design, and the effective treatment and recovery of paraffin resources and the smooth oil transportation of crude oil pipes are realized.

Referring to fig. 2, as an exemplary implementation manner of the wax scraping mechanism 20, the wax scraping mechanism 20 includes a scraping blade 21 for scraping the wax layer and a crushing blade 22 for crushing the wax block, the crushing blade 22 is configured to have a spiral shape portion and can be rotationally driven, and the crushing blade 22 is disposed outside the spiral shape portion of the scraping blade 21 in a discharge direction defined by the spiral shape portion when rotationally driven.

Therefore, when the oil pipeline cleaning device works, the wiping blade 21 is driven by external force to rotate (such as a motor), the wiping blade 21 rotates, and the wiping blade 21 generates wiping motion on the inner wall of the oil pipeline through rotation, so that the wax layer on the inner wall of the pipeline falls off. Since the wiper blade 21 has the spiral-shaped portion, the wiper blade 21 generates an extrusion force in a specific direction along the spiral-shaped portion to the detached wax block when rotating, and the extrusion force is the discharge direction for the wax block. Because the crushing knife 22 is positioned at the outer side of the discharging direction, the wax block can automatically enter the action range of the crushing knife 22 under the action of the extrusion force and then is crushed by the crushing knife 22.

Here, as an exemplary implementation of the wiper blade 21 having the spiral-shaped portion, the wiper blade 21 is formed by a plurality of blade units arranged in a ring shape to have a spiral-like profile, that is, the blade units are twisted along the same side. Two adjacent scraper units are spaced apart from each other by a certain distance, so that the wax block can move in the direction of the crushing blade 22 after being scraped and separated.

In this embodiment of the wiper blade 21, the space between the wiper units may be used as a material guiding portion, which abuts against the crushing blade 22. Of course, as other implementation manners of the scraper portion, the material guiding portion may also be a groove formed on the scraper unit.

Further, as another mode of realizing the wiper blade 21, a known form such as an extrusion screw blade widely used in extrusion molding may be used.

As an exemplary implementation of the crushing blade 22, it may include a plurality of crushing blade units arranged in a ring shape, and a significant space is provided between two adjacent crushing blade units. The spacing not only reduces the resistance that the wax block applies to the crush blades 22 but also reduces the "sticking" of the wax block, i.e., the spacing. But also facilitates the movement of the crushed wax pieces by the crushing blades 22 for eventual collection.

As an implementation manner for collecting the crushing blades 22, the wax scraping mechanism 20 further includes a wax receiving flow combiner 23, and the wax receiving flow combiner 23 is disposed outside the discharging direction of the crushing blades 22.

Thus, in operation, the wax pieces crushed by the crushing blade 22 can be supplied and collected by the wax bearing collector 23 to prevent them from scattering.

As an exemplary implementation of the wax bearing manifold 23, it may be tapered as shown in fig. 2, with the wider portion of the taper being adjacent the comminuting blades 22.

In an exemplary embodiment, the wax scraping mechanism 20 further includes a buffer spacer 24, and the crushing blade 22 is disposed between the buffer spacer 24 and the wiper blade 21.

Therefore, when the wax block crusher works, the buffer clapboard 24 can block the wax block which falls out of the action range of the crushing cutter 22, and the wax block is prevented from being separated from the crushing cutter 22 too early through the enclosing action generated by the scraping cutter 21, so that the crushing effect of the crushing cutter 22 on the wax block is improved.

The shape of the buffer spacer 24 may be an "L" shape or the like having a bent portion.

An exemplary implementation of the structure of the wax melting mechanism 30 includes a heating body 31 for heating and melting the wax block accommodated in the inner cavity of the heating body 31, the heating body 31 is provided with a one-way conduction valve 32, and the one-way conduction valve 32 is communicated with the discharge hole of the heating body 31.

Therefore, when the device works, the purpose of using the check valve is to prevent oil outside the device from entering the device to influence the operation of the device and improve the wax guiding efficiency. Considering that the check valve is in a liquid environment for a long time, the requirement on the sealing performance of the check valve is high, the common check valve can cause the check conduction valve 32 to be incapable of being completely closed due to impurities in oil flow, and oil at a part of an oil outlet flows back to an oil inlet to generate influence, so that the cleaning device adopts a check valve body for preventing backflow blockage, namely, another spring, a corresponding check cavity and a corresponding sliding column are added into the structure of the original check valve. When the oil pressure is larger, the generated force pushes the other spring to move and drives the sliding column to move; when the oil pressure is reduced, the restoring force of the spring drives the sliding column to move to the other side, the groove on the surface of the sliding column moves to one side, and the oil cannot continuously drive the sliding column to move, so that the aim of preventing backflow can be fulfilled.

It is easily conceivable that the heating principle of the heating body 31 may be the use of a well-known form of electric heating or electromagnetic heating. The specific shape or configuration thereof is implemented according to an electric heating or electromagnetic heating body 31 which is widely used.

Optionally, the wax melting mechanism 30 is provided with a filter screen 33 at a position close to the discharge port.

The design considerations for the filter screen 33 are: the melted liquid paraffin can be discharged out of the device, and the paraffin with larger volume is blocked by the filter screen and stays in the pipeline. The strengthening heat along with the tail part quickly counteracts and melts until the tail part melts and then flows out along with the crude oil, so that the pipeline is prevented from being blocked, and the paraffin problem is thoroughly treated.

It should be understood that a communication port may be provided to allow wax pieces to pass from the wax scraping mechanism 20 to the wax melting mechanism 30. And a material pushing assembly is arranged in the communication port. The pushing assembly may take the form of a widely used extrusion screw or the like, or a belt or the like, as will be readily appreciated by the public.

Typically, the wax scraping mechanism 20 and the wax melting mechanism 30 are assembled by a shaft connector 60, the shaft connector 60 includes an extendable sleeve 61, and universal joints 62 respectively disposed at two ends of the extendable sleeve 61, and the universal joints 62 are used to connect the wax scraping mechanism 20 and the wax melting mechanism 30.

Therefore, when the device works, the two universal rotating shafts can adjust the rotating postures of the wax scraping mechanism 20 and the wax melting mechanism 30 through respective rotation so as to be adapted to the bending trend of the petroleum pipeline. The wax scraping mechanism 20 and the wax melting mechanism 30 are adjusted in a changing manner through the telescopic adjustment of the telescopic shaft sleeve 61. Thereby, the respective supported attitudes of the wax scraping mechanism 20 and the wax melting mechanism 30 are adapted by the rotational attitude and the telescopic attitude.

Of course, the two can also adopt split type, and at this moment, the wax stone material of being discharged by scraping wax mechanism 20 can transport to melting wax mechanism 30 through pipeline etc..

As an exemplary implementation manner of the wax scraping support machine, the wax scraping support mechanism 40 includes a scissors type shrinking frame 41, one end of the scissors type shrinking frame 41 is installed on the wax scraping, and the other end of the scissors type shrinking frame 41 is installed with a walking wheel assembly 42.

Therefore, the adjustment of the linear direction of the wax scraping supporting mechanism 40 is ensured through the telescopic adjustment of the scissor type contraction frame 41, and the convenient movement of the wax scraping supporting mechanism 40 can be realized through the walking wheel assembly 42.

The walking wheel assembly 42 can adopt a crawler-type traction wheel mode, and a motor can be configured for the crawler-type traction wheel. Certainly, a traction controller can be arranged, when the pipe diameter is detected to be larger than the supporting range of the guide wheel, the working adjusting device is started, the adjusting rod is pushed to move forwards under the action of the motor, and the guide wheel can be pushed to expand outwards through the transmission of the shear type telescopic pipe. When the crawler wheel is close to the pipe wall, the pressure sensor at the bottom of the crawler wheel can feed back signals to stop pushing and pulling. In a similar way, the contraction of the guide wheel can be controlled, so that the crawler wheels can be ensured to self-adaptively walk in the same circumference, and the working efficiency of the device is improved. The crawler wheel main body part is provided with a motor for supplying power, and the two external interfaces can form a certain curvature so as to ensure smooth movement in the pipeline.

As an exemplary implementation manner of the wax melting supporting mechanism 50, the wax melting supporting mechanism 50 includes a supporting rod 51 and a buffer spring 53 sleeved on the supporting rod 51, and the supporting rod 51 is fixedly connected to a supporting wheel 52.

Thus, the vibration of the wax melting mechanism 30 along with the movement of the petroleum pipeline is reduced through the buffer spring 53. In practical design, the support wheel 52 is a steel belt VF tire with high flexibility, which reduces the impact on the tube wall and the loss of the tire, and improves the traction performance and the stability thereof. The wheel is externally coated with a layer of film, so that the rubber is prevented from reacting with crude oil in a contact manner for a long time, and sufficient friction force is ensured to drive the wheel to move forward. In addition, considering the radius uncertainty of the inner wall of the oil delivery pipe due to the accumulation of paraffin, and in order to ensure the uniform and stable stress of the supporting wheel 52, the tire is equidistantly discharged by 360 degrees and is connected with the device through the spring, so that the tire can be stably clamped on the inner walls of the pipelines with different radii to move, and the running stability of the device is improved.

The hub motor is used as the power to drive the VF tire to rotate and advance. Each support wheel 52 is controlled by a hub motor, so that flexible and free small-range angle steering adjustment can be realized, the support wheels are used for adapting to different pipe wall working conditions, and transition of the device at the bent connection part of the pipe wall is facilitated. Because the motion condition of the rear module of the device is stable, the motion driven by the hub motor can be set to be near uniform motion, and the operation reliability of the device is improved.

This application cleaning device still can set up energy supply mechanism 70, includes: the lithium ion battery pack 72 arranged annularly around the conduction pipe is connected by laser welding between an annular casing 71 and a circumferential aluminum cover plate 73, which are integrally formed. In view of the special environment of the oil pipeline, the exterior of the device is coated with an anticorrosive material, and the insulating isolation plate 74 is connected with the supporting wheel 52 through a clamping groove. In order to ensure the stability of the device on the oil pipeline, three laser distance measuring instruments 83 are annularly arranged, the distance from each direction of the device to the inner wall of the pipeline is detected,

in this way, the lithium ion battery pack 72 supplies power in a concentrated manner, and the existing cells are placed in an annular housing 71 having a semicircular cross section in an annular array. The battery core adopts a lithium electrolyte annular lithium battery, and has the advantages of high energy density, long service life, stable supply voltage, large capacity and small discharge rate, and can well maintain the long-time stable work of the device. The shell is integrally formed by adopting an aluminum alloy material, the shell is packaged by using a circumferential aluminum cover plate 73, and an anticorrosive material coating (not shown in the figure) is attached to the surface of the material, so that the corrosion effect of substances such as oil and the like is reduced. The cover plate and the shell are connected by laser welding, so that the danger possibly generated by cold welding is greatly reduced. All install insulating barrier 74 additional between electric core and shell apron contact department, all paste with sealed insulating glue at wire splice junction and shell opening part, prevent the electric leakage, improve the security of device.

As an exemplary implementation, the lithium ion battery pack 72 is placed between the universal shaft and the one-way valve and wrapped around the electric heating wax melting coil, the middle part is used for heating the scraped wax slag, the compactness of the device is improved, and the generated electric energy can be directly transmitted to the heating wire and can be transported to the supporting wheel 52 through the hidden wire and to the guiding wheel through the universal shaft. The housing of the power supply may also function as the connecting means. The front end of the shell is connected with the universal shaft through the middle reversing part; the rear part is provided with a clamping groove for connecting a control rod for controlling the extension and contraction of the supporting wheel 52; the interior of the shell is connected with the electric heating coil part through the annular heat insulation partition plate, so that the structural density of the device is fully improved, and the occupied space is reduced.

The cleaning device of the present application may also be provided with a machine vision mechanism 80, which may be mounted on the wiping mechanism or on the wax melting mechanism 30. The machine vision mechanism 80 may include a Beidou smart chip 81, a speed sensor 82, a draft tube 85, and a laser range finder 83.

Like this, adopt big dipper intelligent chip 81 that can realize real-time location and map and found, can transmit relative position information and motion state to control module with radio transmission's form to real-time remote display, thereby be convenient for staff monitoring devices's operation process, support performance. Because this device only need move along the pipe diameter direction in the oil transportation intraductal, be equivalent to at two-dimensional plane translation, consequently the data of transmission are simple, and the strong operability realizes fairly easily.

The laser transmitters can be linearly and symmetrically arranged for 3, after the feedback data is processed, the direction change of the distance from the front to the front can be obtained, and the like, so that the device can be used for the operation of a stepless adjusting motor, the device can be always kept to stably run at the axis of a pipeline, and the low-cost and high-precision road condition detection and adjustment can be realized. Whether the pipeline in the place ahead exists slope and bending can be detected like this to with information transfer to guide traction track for adjusting device's direction of guidance, thereby the cardan shaft in rethread device middle part makes holistic advancing direction obtain adjusting, and the device consequently can normally operate under comparatively complicated environment. Similarly, because the motion rule and the environment in the pipeline are simple, a linear array multipoint laser imaging echo detection technology based on the APD chip 84 can be adopted.

Speed sensing installs in one-way conduction department, for laminating with the fuselage appearance, selects annular speedtransmitter 82 based on the transaxle, and this sensor simple structure is compact, and measurement accuracy is high, the required function of this device of realization that can be fine: 1) when the running speed of the device is less than the set flow speed, the device can provide the motion power along with the adjustment of the flow speed of the crude oil, so that the motion speed of the whole device is kept near 0.2m/s, the conditions that the motion speed of the device is unstable and the cleaning effect is not ideal due to the interference of the oil flow are greatly reduced, and the practicability of the device is improved; 2) when the device because of the unexpected condition card in the pipeline, the gained numerical value of sensor can take place sharp change and fall to zero, the device carries out negative feedback regulation this moment, data transmission is to motor department, control buffer spring 53 and formula expansion bracket cut, make leading wheel and supporting wheel 52 shrink, device free fall and along with intraductal oil flow move forward, finally flow out at the play mouth of pipe, go out the data of mouth of pipe department or cooperation big dipper location transmission, thereby can effectively solve the emergence of this type of unexpected condition, the guarantee performance of device has been improved.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application.

Claims

1. A cleaning device for an oil delivery pipe, comprising:

the wax melting mechanism is used for heating and melting the wax block;

2. The cleaning apparatus according to claim 1, wherein the wax scraping mechanism includes a scraping blade for scraping the wax layer and a crushing blade for crushing the wax block, the crushing blade being configured to have a spiral-shaped portion and to be capable of being rotationally driven, the crushing blade being disposed outside the scraping blade in a discharge direction defined by the spiral-shaped portion when rotationally driven.

3. The cleaning apparatus as claimed in claim 2, wherein the wax scraping mechanism further comprises a wax bearing flow combiner disposed outside in the discharging direction of the crushing blade.

4. The cleaning device according to claim 2, wherein the wax scraping mechanism further comprises a buffer spacer, and the crushing blade is arranged between the buffer spacer and the wiping blade.

5. The cleaning apparatus according to claim 1, wherein the wiper blade is provided with a guide portion abutting against the crushing blade.

6. The cleaning device according to claim 1, wherein the wax melting mechanism comprises a heating body for heating and melting the wax block accommodated in the inner cavity of the heating body, and the heating body is provided with a one-way conduction valve which is communicated with the discharge hole of the heating body.

7. The cleaning device of claim 6, wherein the wax melting mechanism is provided with a filter screen at a position close to the discharge port.

8. The cleaning apparatus as claimed in claim 1, wherein the wax scraping mechanism and the wax melting mechanism are assembled by a shaft connector, the shaft connector comprises a telescopic shaft sleeve and universal joints respectively located at two ends of the telescopic shaft sleeve, and the universal joints are used for being mounted and connected with the wax scraping mechanism and the wax melting mechanism.

9. The cleaning device of claim 1, wherein the wax scraping support mechanism comprises a scissors type contraction frame, one end of the scissors type contraction frame is mounted on the wax scraping, and the other end of the scissors type contraction frame is mounted with a traveling wheel assembly.

10. The cleaning device of claim 1, wherein the wax melting support mechanism comprises a support rod and a buffer spring sleeved on the support rod, and a support wheel is fixedly connected to the support rod.