阅读说明：本技术 一种高强度输油油管 (High-strength oil transportation pipe ) 是由 席赫 于 2020-12-09 设计创作，主要内容包括：本发明属于输油管道领域,尤其涉及一种高强度输油油管,包括内管和外管,内管与外管之间形成环形的滤后过液腔,滤后过液腔一端对应的内管设置有过滤段,滤后过液腔另一端对应的内管设置有过液段,内管内滑动密封插装有两个芯塞,按照位置关系分别称为过滤段芯塞和过液段芯塞,过滤段芯塞通过轴向移动能够将过滤段完全封堵,过液段芯塞通过轴向移动能够将过液段完全封堵,过滤段芯塞与过液段芯塞之间的内管上固接有压力管,压力管进压推动过滤段芯塞和过液段芯塞背向移动,压力管的负压使得过滤段芯塞和过液段芯塞相向移动；与普通输油油管功能单一相比较,本发明具有过滤、在线冲洗过滤网和截流三方面的功能,且可任意切换,重复使用。(The invention belongs to the field of oil pipelines, and particularly relates to a high-strength oil pipeline, which comprises an inner pipe and an outer pipe, wherein an annular filtered liquid passing cavity is formed between the inner pipe and the outer pipe, the inner pipe corresponding to one end of the filtered liquid passing cavity is provided with a filtering section, the inner pipe corresponding to the other end of the filtered liquid passing cavity is provided with a liquid passing section, two core plugs are inserted in the inner pipe in a sliding and sealing manner and are respectively called as a filtering section core plug and a liquid passing section core plug according to the position relation, the filtering section core plug can completely block the filtering section through axial movement, the liquid passing section core plug can completely block the liquid passing section through axial movement, a pressure pipe is fixedly connected on the inner pipe between the filtering section core plug and the liquid passing section core plug, the pressure pipe pushes the filtering section core plug and the liquid passing section core plug to move in the opposite directions, and the negative pressure of the pressure pipe enables the filtering section core plug and; compared with the single function of the common oil transportation pipe, the invention has the functions of filtering, online washing of the filter screen and interception, and can be switched randomly and repeatedly used.)

1. A high strength oil transportation pipe which characterized in that: including inner tube (4) and outer tube (2), inner tube (4) cartridge in outer tube (2), and form annular filtration back between inner tube (4) and outer tube (2) and cross liquid chamber (3), inner tube (4) that cross liquid chamber (3) one end after the filtration and correspond is provided with filter segment (1), inner tube (4) that the filter liquid chamber (3) other end corresponds after the filtration is provided with crosses liquid section (7), inner tube (4) sliding seal cartridge has two core plugs, be called filter segment core plug (8) and cross liquid section core plug (11) respectively according to the position relation, two core plug structures are the same, the symmetry installation, filter segment core plug (8) can be with filter segment (1) complete shutoff through axial displacement, cross liquid section core plug (11) and can be with cross liquid section (7) complete shutoff through axial displacement, the rigid coupling has pressure pipe (10) on inner tube (4) between filter segment core plug (8) and the liquid section core plug (11), the pressure pipe (10) is communicated with the inner pipe (4), the pressure of the pressure pipe (10) pushes the filter section core plug (8) and the liquid passing section core plug (11) to move back to back, and the negative pressure of the pressure pipe (10) enables the filter section core plug (8) and the liquid passing section core plug (11) to move oppositely;

the core plug comprises a plug sleeve (12), a sliding sleeve (13), a fixed sleeve (18) and a plug (17), wherein one end of the plug sleeve (12) is open, and the other end of the plug sleeve (12) is closed, the sliding sleeve (13) is inserted into the plug sleeve (12) in a sliding sealing manner, the plug (17) is in threaded connection with the open end of the plug sleeve (12), so that the sliding sleeve (13) is plugged into the plug sleeve (12), the fixed sleeve (18) is positioned on the inner side of the sliding sleeve (13) and is in sliding sealing fit with the sliding sleeve (13), the fixed sleeve (18) is fixedly connected to the inner side of the plug (17), a step is arranged on the inner side of the sliding sleeve (13), the step abuts against the fixed sleeve (18), and the axial sliding of the sliding sleeve (13) is limited by the step; a spring (20) is arranged between the sliding sleeve (13) and the closed end of the plug sleeve (12), a radial hole is processed at one end of the sliding sleeve (13) close to the spring (20), a corresponding radial hole is processed on the plug sleeve (12), when the radial hole of the plug sleeve (12) is communicated with the radial hole of the sliding sleeve (13), a circulation channel (19) communicating the inside and the outside of the core plug is formed, under the action of the pulling force of the spring (20), the radial hole of the sliding sleeve (13) and the radial hole of the plug sleeve (12) have the tendency of dislocation, so that the circulation channel (19) is closed, and at the moment, compared with the distance from the radial hole of the plug sleeve (12) to the spring (20), the radial hole of the sliding sleeve (13) is closer to the spring (20);

the outer diameter of the middle part of the plug sleeve (12) and the outer diameter of the plug (17) are larger than the outer diameter of other parts of the core plug, two large-diameter parts are respectively in sealing fit with the inner tube (4) to form two sealing points, an annular plugging cavity (21) is formed between the plug sleeve (12) and the inner tube (4) between the two sealing points, a pressure transfer hole (15) is processed on the plug sleeve (12) corresponding to the plugging cavity (21), an annular groove (16) is processed on the outer side of the sliding sleeve (13) corresponding to the pressure transfer hole (15), a fixing ring (14) is arranged between the annular groove (16) and the plug sleeve (12), the inner side and the outer side of the fixing ring (14) are respectively in sealing fit with the plug sleeve (12) and the sliding sleeve (13) through a sealing ring, the fixing ring (14) is fixedly connected with the plug sleeve (12) through a screw, after pressure is transferred into the annular groove (16) through the pressure transfer hole (15), the fixing ring (14) and the, because the fixed ring (14) is fixed, the pressure pushes the sliding sleeve (13) to slide towards the direction close to the plug (17), and finally the flow channel (19) is opened;

the inner side of the filtering section (1) is communicated with a back-washing liquid outlet pipe (9), and the filtered liquid filtering cavity (3) is communicated with a back-washing liquid inlet pipe (6).

2. The high strength oil transfer tubing of claim 1, wherein: the filter segment core plug (8) and the liquid passing segment core plug (11) are provided with a half-moon-shaped spacer ring (5) therebetween, the half-moon-shaped spacer ring (5) is in interference fit with the inner tube (4), and the half-moon-shaped spacer ring (5) is positioned above the outlet of the pressure tube (10).

3. The high strength oil transfer tubing of claim 1, wherein: the inner pipe (4) is respectively provided with a limiting ring (20) for limiting the filtering section core plug (8) and the liquid passing section core plug (11), and the end face of the limiting ring (20) facing the flowing direction of the fluid is a conical surface.

Technical Field

The invention belongs to the field of oil pipelines, and particularly relates to a high-strength oil pipeline.

Background

The oil is pumped to the ground by the exploitation of the pumping unit and is conveyed to the combined station through an oil conveying pipe laid on the shallow ground surface, the existing oil conveying pipe is formed by sealing and connecting a plurality of common oil conveying pipes end to end, only has the conveying function, and has very single function.

Disclosure of Invention

The technical problem to be solved is as follows:

in order to solve the problem of single function of the existing oil delivery pipe in the background technology, the invention provides a multifunctional high-strength oil delivery pipe which has three functions of filtering, backwashing a filter screen on line and intercepting.

The technical scheme is as follows:

the technical scheme provided by the invention is as follows: a high-strength oil pipe for delivering oil is composed of an internal pipe inserted in external pipe, an annular filtered liquid cavity between internal pipe and external pipe, a filter segment in the internal pipe, a liquid segment in the internal pipe, two core plugs in the internal pipe, the filter section core plug and the liquid passing section core plug are respectively called as a filter section core plug and a liquid passing section core plug according to the position relation, the two core plugs have the same structure, the filter section core plugs are symmetrically installed, the filter section core plugs can completely block the filter section through axial movement, the liquid passing section core plugs can completely block the liquid passing section through axial movement, a pressure pipe is fixedly connected to the inner pipe between the filter section core plugs and the liquid passing section core plugs and communicated with the inner pipe, the pressure pipe pushes the filter section core plugs and the liquid passing section core plugs to move in a back direction under the pressure of the pressure pipe, and the filter section core plugs and the liquid passing section core plugs move in a face-to-face mode under the negative pressure of the pressure pipe;

the core plug comprises a plug sleeve, a sliding sleeve, a fixed sleeve and a plug, wherein one end of the plug sleeve is open, and the other end of the plug sleeve is closed; a spring is arranged between the sliding sleeve and the closed end of the plug sleeve, a radial hole is processed at one end of the sliding sleeve close to the spring, a radial hole is processed on the corresponding plug sleeve, when the radial hole of the plug sleeve is communicated with the radial hole of the sliding sleeve, a circulation channel communicated with the inside and the outside of the core plug is formed, and under the action of the tensile force of the spring, the radial hole of the sliding sleeve and the radial hole of the plug sleeve have the tendency of dislocation, so that the circulation channel is closed, and at the moment, compared with the distance from the radial hole of the plug sleeve to the spring, the radial hole of the sliding sleeve is closer to the spring; the outer diameter of the middle part of the plug sleeve and the outer diameter of the plug are larger than those of other parts of the core plug, two large-diameter parts are respectively in sealing fit with the inner tube, so that two sealing points are formed, an annular plugging cavity is formed between the plug sleeve between the two sealing points and the inner tube, a pressure transfer hole is processed on the plug sleeve corresponding to the plugging cavity, an annular groove is processed on the outer side of a sliding sleeve corresponding to a pressure transfer hole section, a fixing ring is arranged between the annular groove and the plug sleeve, the inner side and the outer side of the fixing ring are respectively in sealing fit with the plug sleeve and the sliding sleeve through a sealing ring, the fixing ring and the plug sleeve are fixedly connected through screws, pressure is transferred into the annular groove through the pressure transfer hole and then simultaneously acts on the fixing ring and the sliding sleeve, and the pressure pushes the sliding sleeve to slide towards the direction close to the plug because; the inner side of the filtering section is communicated with a back-flushing liquid outlet pipe, and the filtered liquid filtering cavity is communicated with a back-flushing liquid inlet pipe.

Furthermore, a half-moon-shaped spacer ring is arranged between the filter segment core plug and the liquid passing segment core plug, the half-moon-shaped spacer ring is in interference fit with the inner tube, and the half-moon-shaped spacer ring is positioned above the outlet of the pressure tube.

Furthermore, the inner pipe is respectively provided with a limiting ring for limiting the filter section core plug and the liquid passing section core plug, and the end surface of the limiting ring facing the fluid flowing direction is a conical surface.

(III) the beneficial effects are as follows:

firstly, the invention has an online filtering function and can filter out impurities in crude oil; secondly, the oil transportation is realized, and the function of cleaning the filter screen on line is realized; and thirdly, the invention also has the function of intercepting flow and meets the requirements of operations such as leakage, overhaul and the like.

Drawings

FIG. 1 is a schematic diagram of the present invention in a filtration state.

Fig. 2 is a schematic view of the present invention in a configuration for cleaning the filter stage.

Fig. 3 is a schematic view of the construction of the plug of the present invention in a filtration state.

FIG. 4 is a schematic view of the construction of the plug of the present invention in the cleaning of the filter section.

In the figure: 1-filtration section, 2-outer tube, 3-filtered liquid passing cavity, 4-inner tube, 5-half moon-shaped spacer ring, 6-back flushing liquid inlet tube, 7-liquid passing section, 8-filtration section core plug, 9-back flushing liquid outlet tube, 10-pressure tube, 11-liquid passing section core plug, 12-plug sleeve, 13-sliding sleeve, 14-fixing ring, 15-pressure transfer hole, 16-annular groove, 17-plug, 18-fixing sleeve, 19-flow channel, 20-spring and 21-plugging cavity.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

The embodiment comprises an inner tube 4 and an outer tube 2, wherein the inner tube 4 is inserted into the outer tube 2, an annular filtered liquid passing cavity 3 is formed between the inner tube 4 and the outer tube 2, the inner tube 4 corresponding to one end of the filtered liquid passing cavity 3 is provided with a filtering section 1, the inner tube 4 corresponding to the other end of the filtered liquid passing cavity 3 is provided with a liquid passing section 7, two core plugs are inserted in the inner tube 4 in a sliding and sealing manner and are respectively called as a filtering section core plug 8 and a liquid passing section core plug 11 according to the position relation, the two core plugs are identical in structure and are symmetrically installed, the filtering section core plug 8 can completely block the filtering section 1 through axial movement, the liquid passing section core plug 11 can completely block the liquid passing section 7 through axial movement, a pressure tube 10 is fixedly connected to the inner tube 4 between the filtering section core plug 8 and the liquid passing section core plug 11, the pressure tube 10 is communicated with the inner tube 4, the pressure tube 10 pushes the filtering section core plug 8 and the liquid passing section, the negative pressure of the pressure pipe 10 causes the filter section core plug 8 and the liquid passing section core plug 11 to move towards each other;

the core plug comprises a plug sleeve 12, a sliding sleeve 13, a fixed sleeve 18 and a plug 17, wherein one end of the plug sleeve 12 is open, and the other end of the plug sleeve is closed, the sliding sleeve 13 is inserted into the plug sleeve 12 in a sliding and sealing manner, the plug 17 is in threaded connection with the open end of the plug sleeve 12, so that the sliding sleeve 13 is plugged into the plug sleeve 12, the fixed sleeve 18 is positioned at the inner side of the sliding sleeve 13 and is in sliding and sealing fit with the sliding sleeve 13, the fixed sleeve 18 is fixedly connected to the inner side of the plug 17, a step is arranged at the inner side of the sliding sleeve 13 and is abutted against the fixed sleeve 18, and the step limits the axial sliding of the sliding sleeve 13; a spring 20 is arranged between the sliding sleeve 13 and the closed end of the plug sleeve 12, a radial hole is processed at one end of the sliding sleeve 13 close to the spring 20, a corresponding radial hole is processed on the plug sleeve 12, when the radial hole of the plug sleeve 12 is communicated with the radial hole of the sliding sleeve 13, a circulation channel 19 communicating the inside and the outside of the core plug is formed, under the action of the pulling force of the spring 20, the radial hole of the sliding sleeve 13 and the radial hole of the plug sleeve 12 have the tendency of dislocation, so that the circulation channel 19 is closed, and at the moment, compared with the distance from the radial hole of the plug sleeve 12 to the spring 20, the radial hole of the sliding sleeve 13 is closer to the spring 20;

the outer diameter of the middle part of the plug sleeve 12 and the outer diameter of the plug 17 are larger than the outer diameter of other parts of the core plug, the two large-diameter parts are respectively in sealing fit with the inner pipe 4, thereby forming two sealing points, an annular plugging cavity 21 is formed between the plug sleeve 12 and the inner tube 14 between the two sealing points, a pressure transmitting hole 15 is processed on the plug sleeve 12 corresponding to the plugging cavity 21, an annular groove 16 is processed on the outer side of the sliding sleeve 13 corresponding to the pressure transmitting hole 15 section, a fixing ring 14 is arranged between the annular groove 16 and the plug sleeve 12, the inner side and the outer side of the fixing ring 14 are respectively matched with the plug sleeve 12 and the sliding sleeve 13 in a sealing way through a sealing ring, the fixing ring 14 is fixedly connected with the plug sleeve 12 through a screw, after pressure is transmitted into the annular groove 16 through the pressure transmitting hole 15, the pressure acts on the fixing ring 14 and the sliding sleeve 13 simultaneously, because the fixed ring 14 is fixed, the pressure pushes the sliding sleeve 13 to slide towards the direction close to the plug 17, and finally the flow channel 19 is opened;

the inner side of the filtering section 1 is communicated with a back-washing liquid outlet pipe 9, and the filtered liquid filtering cavity 3 is communicated with a back-washing liquid inlet pipe 6.

And a half-moon-shaped spacer ring 5 is arranged between the filtering section core plug 8 and the liquid passing section core plug 11, the half-moon-shaped spacer ring 5 is in interference fit with the inner tube 4, and the half-moon-shaped spacer ring 5 is positioned above the outlet of the pressure tube 10. The half-moon-shaped spacer ring 5 has two functions, namely firstly, the filtering section core plug 8 and the liquid passing section core plug 11 are isolated; and secondly, serves to prevent inner tube 4 from being pierced by pressure tube 10.

The inner pipe 4 is respectively provided with a limiting ring 20 for limiting the filtering section core plug 8 and the liquid passing section core plug 11, the end face of the limiting ring 20 facing the flowing direction of the fluid is a conical surface, and the conical surface has the function of enabling crude oil to flow and smoothly transit and avoiding turbulent flow.

The using process of the invention is as follows:

at least two of the oil-conveying pipes are required to be connected in series, under the normal oil conveying state, as shown in figure 1, crude oil is conveyed from the inner pipe 4, because the filter section 1 is not blocked by the filter section core plug 8, and the blocking cavity 21 is in a closed state at the moment, no pressure enters the pressure transmission hole 15, namely the flow channel 19 is in a closed state, the crude oil can only enter the filtered liquid filtering cavity 3 through the filter screen of the filter section 1; since the liquid passing section 7 is not blocked by the liquid passing section core plug 11, the crude oil in the filtered liquid passing cavity 3 flows back into the inner pipe 4 from the liquid passing hole of the liquid passing section 7 again and continues to flow forwards. In the process, impurities in the crude oil are forced to stay on the inner side of the filter screen. As can be seen from the discussion in this paragraph, the present invention has an on-line filtration function, and can filter out impurities in crude oil.

When the inner side of the filter screen is blocked and suppressed by impurities, hydraulic pressure is applied to the pressure pipe 10 to push the filter section core plug 8 and the liquid passing section core plug 11 to move back and forth until the filter section core plug 8 completely blocks the filter section 1, and the liquid passing section core plug 11 completely blocks the liquid passing section 7, as shown in fig. 2, the blocking cavity 21 is communicated with the filtered liquid passing cavity 3 through the filter screen at the moment, then a valve of a back washing liquid inlet pipe 6 is opened, and back washing liquid with certain pressure enters the filtered liquid passing cavity 3, so that two effects can be achieved, and firstly, the blocked impurities are washed away from the outer side of the filter screen; secondly, the pressure is transmitted to the sliding sleeve 13 from the pressure transmission hole 15, the sliding sleeve 13 is pushed to slide, and the flow channel 19 is opened, so that the normal conveying of the crude oil is ensured, the crude oil can be filtered by the next oil conveying pipe although the crude oil is not filtered by the oil conveying pipe in the section, and the reason why at least two oil conveying pipes are required to be connected in series in the invention is also shown. The back washing liquid outlet pipe 9 is opened, and the back washing liquid outlet pipe 9 is communicated with the inner side of the filter screen, so that impurities washed away from the inner side of the filter screen are discharged through the back washing liquid outlet pipe 9, and it should be specially noted that a certain pressure is required to be provided in the blocking cavity 21 in the back washing process to ensure that the flow channel 19 is always in an open state. As can be seen from the discussion in this section, the oil transportation device has the function of cleaning the filter screen on line while realizing oil transportation. The filter screen does not need to be disassembled and can be used repeatedly.

When the maintenance and the transportation stop are needed, the hydraulic pressure is stopped being transmitted to the back washing liquid inlet pipe 6, so that the flow channel 19 is closed, the filter section core plug 8 is in a state of completely plugging the filter section 1, and the liquid passing section core plug 11 is in a state of completely plugging the liquid passing section 7, so that the whole oil transportation pipe is in a broken circuit and cut-off state. As can be seen from the discussion of the section, the invention also has the function of intercepting, and meets the requirements of operations such as leakage, overhaul and the like.

After the back washing or the interception is finished, the negative pressure is needed to be sucked through the pressure pipe 10, the filter section core plug 8 and the liquid passing section core plug 11 move oppositely under the action of larger negative pressure, and the filter section 1 and the liquid passing section 7 are opened again, so that the filtering function is realized again, and the filter can be repeatedly used. The invention can be buried in the shallow ground surface, and the outer side of the invention is wound with the anticorrosive coating, thereby reducing the erosion of soil to the invention.