Elbow connecting piece for petroleum pipeline

Abstract

The invention relates to the technical field of pipeline elbow connecting pieces, in particular to an elbow connecting piece for a petroleum pipeline, which comprises an elbow main body, the elbow main body is arranged in a bending manner, one end of the elbow main body is an oil inlet end, the other end of the elbow main body is an oil outlet end, and a main buffer assembly is mounted at the bending position of the elbow main body; the main buffering assembly and one side of the oil outlet end of the bent main pipe are coaxially arranged, a plurality of auxiliary buffering assemblies are installed on the outer side of the main buffering assembly, the inner sides of the main buffering assembly and the auxiliary buffering assemblies can elastically contract, and oil in the bent pipe body can enter the auxiliary buffering assemblies and the main buffering assembly. When backflow liquid flow is detected through the liquid flow direction detection assembly, oil liquid impacted in a one-way mode enters the main buffering assembly and the auxiliary buffering assembly, the main buffering assembly and the auxiliary buffering assembly buffer generated reverse impact under internal elastic contraction, and impact damage of the water hammer effect to the elbow body is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe elbow connectors, and particularly relates to an elbow connector for an oil pipeline. BACKGROUND

[0002] An oil pipeline is a pipeline transportation system for long-distance and large-scale transportation of crude oil or oil products, mainly composed of a pipeline body, a pump station, a valve station, a first station, an intermediate station, a last station and a monitoring and data acquisition system. When two pipelines are connected in oil pipeline transportation, an elbow connector is used to connect the two pipelines.

[0003] In oil pipeline transportation, water hammer effect occurs when a valve is closed. Water hammer effect refers to the phenomenon that when the liquid flowing in the pipeline is suddenly accelerated or decelerated (for example, a valve is quickly closed, a water pump is suddenly started or stopped), the inertia of the fluid causes the pressure in the pipeline to suddenly increase or decrease, thereby generating an impact wave phenomenon similar to knocking the pipeline with a hammer. This impact wave propagates back and forth in the pipeline, causing vibration and loud noise of the pipeline, and in severe cases, it can even cause the pipeline to burst, the joint to fall off, the valve to be damaged or the equipment to be damaged. The bending part of the elbow pipe is subjected to greater water hammer impact pressure and is more prone to damage.

[0004] A novel pipeline elbow connector is disclosed in Chinese Patent CN209569444U, which comprises an elbow body. The two ends of the elbow body are provided with quick connectors. The quick connector comprises a connector outer wall. A lock cap is arranged on the inner side of the connector outer wall. A disassembly ring, an elastic tooth ring and a tooth ring base for the pipeline to pass through are sequentially arranged inside the lock cap from the outside to the inside. A stepped platform one for supporting the lock cap and the tooth ring base is arranged on the inner side of the connector outer wall. A stepped clamping position one and a stepped clamping position two are sequentially arranged on the inner side of the lock cap from the outside to the inside. The disassembly ring is clamped on the stepped clamping position one. The stepped clamping position two is arranged between the end face of the tooth ring base in contact with the elastic tooth ring and the stepped clamping position two to form a gap for installing the elastic tooth ring. A circumferential groove is arranged on the inner side of the lock cap. A circumferential protrusion is arranged on the outer side of the tooth ring base at the corresponding position of the circumferential groove. The pipeline elbow connector has the advantages of firm connection, good water sealing effect and difficulty in missing installation.

[0005] The above-mentioned related technology has the following defects: when the oil pipe valve is closed, the elbow connection part will be subjected to a large water hammer effect of liquid flow reverse impact. In the prior art, a buffer tank is generally installed on the straight pipe part, but the buffer effect on the elbow connector part is poor. Moreover, the oil liquid transported in the oil pipe itself has a large pressure, which reduces the buffer effect of the buffer tank. SUMMARY

[0006] In order to solve the problems in the background art, the present application provides an elbow connector for an oil pipeline.

[0007] The application provides a bend connecting piece for a petroleum pipeline.

[0008] The main buffer assembly and the auxiliary buffer assembly are elastically contractible.

[0009] The bend main body is internally provided with a liquid flow direction detection assembly.

[0010] The bend main body is externally provided with a power return mechanism for controlling the return of the main buffer assembly and the auxiliary buffer assembly.

[0011] The main buffer assembly comprises a main pipe and an inner thick head.

[0012] The auxiliary buffer assembly is arranged on the circumferential surface of the main pipe.

[0013] The auxiliary buffer assembly is arranged at an acute angle with the axis of the main pipe.

[0014] The liquid flow direction detection assembly comprises a flow detection ring and a horizontal rod.

[0015] The horizontal rod is slidably connected to the inner cavity block.

[0016] The limiting vertical block is elastically connected to the outer surface of the main pipe.

[0017] The flow detection ring is arranged in a conical shape on the inner ring surface of one end of the main pipe, and a sealing plate is arranged on the side of the flow detection ring away from the main pipe, which is in sealing contact with the inner wall of the main pipe.

[0018] Optionally, the auxiliary buffer assembly comprises an auxiliary pipe and an inner thin head, the inner thin head is sealingly and slidingly inserted into the inner side of the auxiliary pipe, the inner thin head is elastically connected with the auxiliary pipe, a thin linkage rod is arranged on the inner side of the auxiliary pipe, the thin linkage rod is coaxially installed with the inner thin head, and the other end of the thin linkage rod slidingly penetrates the inner wall of the auxiliary pipe.

[0019] Optionally, a plurality of tooth grooves are formed on the outer ring surface of the thick linkage rod, the number of the tooth grooves is the same as that of the auxiliary buffer assemblies, the inside of the tooth groove is composed of a plurality of equidistantly distributed teeth, the side of the teeth in the tooth groove close to the inner thick head is an inclined surface, the other side of the teeth in the tooth groove is a vertical surface, a tooth block is engaged in the inside of the tooth groove, the tooth block is elastically connected with the main pipe, a pull rope is fixed on the side of the tooth block away from the main pipe axis, and the other end of the pull rope slidingly penetrates the inner wall of the main pipe.

[0020] The plurality of pull ropes are fixed in one-to-one correspondence with the plurality of auxiliary pipes, a push frame is fixed on the outer end of the thin linkage rod, and the plurality of push frames are in one-to-one correspondence with the plurality of pull ropes and in contact with the side of the bend main body away from the bend main body.

[0021] Optionally, two guide pipes are sleeved on the outer side of the pull rope, the pull rope slides in the guide pipes, one of the guide pipes is fixed with the main pipe, and the other guide pipe is fixed with a sleeve ring.

[0022] The plurality of sleeve rings are sleeved on the outer sides of the plurality of auxiliary pipes in one-to-one correspondence, the sleeve rings can slide on the surfaces of the connected auxiliary pipes, and the guide pipes connected with the sleeve rings are in contact with the adjacent push frames.

[0023] Optionally, a rotating wheel is installed on the end of the push frame away from the connected thin linkage rod, and the rotating wheel is in rolling contact with the adjacent guide pipe.

[0024] Optionally, the transverse groove is arranged in an inclined surface close to the horizontal rod, the end of the horizontal rod close to the transverse groove is in a semispherical shape, when the limiting vertical block is positioned at the highest position, the horizontal rod moves horizontally and is in contact with the inclined surface part of the transverse groove, and the upper end of the positioning clamping block is arranged in an inclined surface close to the side of the main pipe.

[0025] Optionally, the power return mechanism comprises a power telescopic rod, a displacement sensing controller and a sleeve frame, the displacement sensing controller is in sliding contact with the outer side of the horizontal rod, the displacement sensing controller controls the power telescopic rod to extend or retract once when the horizontal rod moves to the left, the extension end of the power telescopic rod is fixed with the sleeve frame, the other end of the power telescopic rod is installed on the outer side of the bend main body, an elastic return rope is installed on the outer end of the thick linkage rod, and the other end of the elastic return rope is fixed with the sleeve frame.

[0026] The outer ring side of the sleeve frame is provided with a plurality of push rods, the number of the push rods is the same as the number of the sub-pipes, the push frame is provided with vertical rods, a plurality of push rods are distributed on the side of the vertical rods one by one, and the push rod can push the corresponding vertical rod to move when the sleeve frame moves to the side of the elbow pipe body.

[0027] In summary, the present application has the following beneficial technical effects: When the water hammer effect occurs, the liquid flow direction detection assembly detects the reverse flow of the liquid flow, the one-way impact oil enters the main buffer assembly and the sub-buffer assembly, the main buffer assembly and the sub-buffer assembly buffer the reverse impact under the internal elastic contraction, and the impact damage of the water hammer effect to the elbow pipe body is reduced.

[0028] When the water hammer effect does not occur in the pipeline, the horizontal rod and the through slot of the limiting vertical block are in a separated state, at this time, the lower end of the limiting vertical block is inserted into the groove on the upper end of the positioning clamping block, so that the normally transported oil liquid cannot push the inner thick head and the inner thin head in the main pipe and the sub-pipe, when the reverse wave occurs in the pipeline due to the water hammer effect, the reverse flowing oil liquid pushes the horizontal rod to insert into the through slot, pushes the limiting vertical block to separate from the positioning clamping block, and the inner thick head is elastically moved in the main pipe under the impact of the reverse flowing oil liquid, at the same time, the oil liquid enters the sub-pipe, and the oil liquid pushes the inner thin head to be elastically moved in the sub-pipe, so that only when the reverse impact of the water hammer effect occurs, the inner thick head and the inner thin head can buffer the pressure of the oil liquid, and the space for buffering when the water hammer effect occurs is increased.

[0029] After the water hammer effect disappears, the flow detection ring is reset to the left under the elasticity of the horizontal rod and the elbow pipe body and the pressure of the oil liquid, the displacement sensing controller controls the sleeve frame to move to the left reciprocatingly through the power telescopic rod, the push rod pushes the vertical rod to drive the inner thin head to reset, and the sleeve frame drives the inner thick head to reset through the elastic reset rope. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure in the embodiment of the present application; Figure 2 is a schematic diagram of the side view structure in the embodiment of the present application; Figure 3 is a schematic diagram of the partial structure in the embodiment of the present application; Figure 4 is a schematic diagram of the partial structure in the embodiment of the present application; Figure 5 is a schematic diagram of the structure of the push frame and the push rod in the embodiment of the present application; Figure 6This is a schematic diagram of the structure inside the main tube in an embodiment of the present invention; Figure 7 This is a schematic diagram of the distribution of tooth grooves and tooth blocks in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure inside the secondary tube in an embodiment of the present invention; Figure 9 This is a schematic diagram of the positioning card block and the limiting block in an embodiment of the present invention.

[0031] Reference numerals: 1. Main body of the bend; 2. Main buffer assembly; 21. Main pipe; 22. Inner thick end; 23. Thick linkage rod; 3. Secondary buffer assembly; 31. Secondary pipe; 32. Inner thin end; 33. Thin linkage rod; 34. Gear groove; 35. Tooth block; 36. Pull rope; 361. Guide tube; 362. Collar; 37. Push frame; 371. Rotary wheel; 4. Liquid flow direction detection assembly; 41. Flow detection ring; 42. Horizontal rod; 43. Inner cavity block; 44. Slider; 45. Limiting block; 46. Through groove; 47. Positioning block; 48. Sealing plate; 5. Power return mechanism; 51. Power telescopic rod; 52. Displacement sensor controller; 53. Sleeve; 54. Vertical rod; 55. Elastic reset rope; 56. Lever. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0033] This invention discloses an elbow connector for oil pipelines. For example... Figures 1-9 As shown, it includes a bent pipe body 1, which is bent. One end of the bent pipe body 1 is the oil inlet end, and the other end is the oil outlet end. A main buffer assembly 2 is installed at the bend of the bent pipe body 1. The main buffer assembly 2 is coaxially arranged with the oil outlet end side of the bent pipe 21. The inner side of the main buffer assembly 2 can elastically expand and contract to buffer the impact of the contacting oil.

[0034] The main buffer assembly 2 includes a main pipe 21 and an inner thicker end 22. The inner thicker end 22 is sealed and slidably inserted into the outside of the main pipe 21, preventing oil from leaking from between the inner thicker end 22 and the main pipe 21 to the other side of the inner thicker end 22. The inner thicker end 22 is elastically connected to the main pipe 21, and the inner thicker end 22 is elastically connected to the main pipe 21 by a large spring, which has the tendency to push the inner thicker end 22 towards the inside of the bend body 1. When the inner thicker end 22 is subjected to reverse impact from the oil, the inner thicker end 22 cushions the impact of the oil by elastically moving within the main pipe 21, reducing the impact damage of the oil impact force on the bend body 1. A thicker linkage rod 23 is provided on the inside of the main pipe 21. One end of the thicker linkage rod 23 is coaxially fixed with the inner thicker end 22, and the other end of the inner thicker end 22 coaxially penetrates the inner wall of the main pipe 21, allowing the inner thicker end 22 to slide coaxially relative to the main pipe 21.

[0035] A plurality of secondary buffer assemblies 3 are mounted outside the main buffer assembly 2, and the secondary buffer assemblies 3 can elastically abut and buffer the impact of the oil liquid. The oil liquid in the elbow pipe body 1 can enter the secondary buffer assemblies 3 and the main buffer assembly 2. The secondary buffer assemblies 3 are mounted on the circumferential surface of the main pipe 21.

[0036] The secondary buffer assemblies 3 are arranged at an acute angle with the axis of the main pipe 21, and a plurality of secondary buffer assemblies 3 are uniformly arranged in a circumferential array around the axis of the main pipe 21.

[0037] A liquid flow direction detection assembly 4 is mounted inside the elbow pipe body 1, and the oil liquid can enter the main buffer assembly 2 only after the oil liquid is detected.

[0038] The liquid flow direction detection assembly 4 includes a flow detection ring 41 and a horizontal rod 42. The flow detection ring 41 is slidably inserted into the elbow pipe body 1. The horizontal rod 42 is located outside the elbow pipe body 1. An inner cavity block 43 is mounted on the outside of the elbow pipe body 1 at the position of the flow detection ring 41. The inner cavity block 43 is in communication with the inside of the elbow pipe body 1. A sliding block 44 is fixed to the outer ring surface of the flow detection ring 41. The sliding block 44 is slidably inserted into the inner cavity block 43. The sliding block 44 moves synchronously with the flow detection ring 41.

[0039] One end of the horizontal rod 42 is slidably inserted into the side of the inner cavity block 43. The sliding block 44 is fixed to the horizontal rod 42. The horizontal rod 42 is elastically connected to the outside of the elbow pipe body 1. The horizontal rod 42 is elastically connected to the elbow pipe body 1 by a straight spring. The straight spring has a tendency to push the horizontal rod 42 to move towards the inner cavity block 43. A limiting vertical block 45 is arranged on the side of the horizontal rod 42 away from the sliding block 44. A through slot 46 is formed on the side of the limiting vertical block 45 close to the horizontal rod 42. During the transportation of the oil liquid, the horizontal rod 42 is in a disengaged state with the through slot 46 under the elastic connection with the elbow pipe body 1 and the impact of the oil liquid on the flow detection ring 41.

[0040] A positioning clamping block 47 is arranged on the lower side of the limiting vertical block 45. The positioning clamping block 47 is fixedly sleeved on the outer end of the coarse linkage rod 23 located outside the main pipe 21. A groove is formed on the upper end of the positioning clamping block 47, which is matched with the lower end of the limiting vertical block 45. The limiting vertical block 45 is elastically connected to the outer surface of the main pipe 21. The limiting vertical block 45 moves up and down relative to the main pipe 21. The limiting vertical block 45 is connected to the main pipe 21 by a vertically arranged elastic expansion rod, which has a tendency to pull the limiting vertical block 45 to move downwards and insert into the groove on the upper end of the positioning clamping block 47. When the oil liquid does not produce water hammer effect, the inner coarse head 22 will not move due to the transportation pressure of the oil liquid. When the water hammer effect is produced, it can ensure that there is enough buffer space to ensure the buffering effect.

[0041] The inclined surface is arranged on one side of the through slot 46 close to the horizontal rod 42, and the horizontal rod 42 is hemispherical on the end close to the through slot 46. When the horizontal rod 42 enters the inside of the through slot 46 and the limiting vertical block 45 is positioned at the highest position, the horizontal rod 42 is in contact with the inclined surface part of the through slot 46. The upper end of the positioning clamping block 47 close to one side of the main pipe 21 is an inclined surface. The hemispherical end of the horizontal rod 42 can push the limiting vertical block 45 to move upward by pushing the through slot 46.

[0042] The inner ring surface of the flow detection ring 41 close to one end of the main pipe 21 is conical. The flow detection ring 41 is provided with a sealing plate 48 away from one side of the main pipe 21. The sealing plate 48 is in sealing contact with the inner wall of the elbow pipe body 1. The sealing plate 48 ensures that the flow detection ring 41 is active, and the oil liquid cannot enter the inner cavity block 43 to cause oil leakage.

[0043] The auxiliary buffer assembly 3 includes an auxiliary pipe 31 and an inner thin head 32. The inner thin head 32 is sealingly and slidingly inserted into the inside of the auxiliary pipe 31. The inner thin head 32 is elastically connected with the auxiliary pipe 31. The auxiliary pipe 31 is provided with a thin linkage rod 33 inside. The thin linkage rod 33 is coaxially installed with the inner thin head 32. The other end of the thin linkage rod 33 slidingly penetrates the inner wall of the auxiliary pipe 31.

[0044] When the water hammer effect oil liquid generates a reverse impact on the flow detection ring 41, the flow detection ring 41 pushes the horizontal rod 42 to enter the inside of the through slot 46 through the inclined surface of the through slot 46 by the sliding block 44, pushes the limiting vertical block 45 to move upward and disengages from the groove of the positioning clamping block 47. The coarse linkage rod 23 and the inner thick head 22 can be moved. The reverse impact of the oil liquid first pushes the inner thick head 22 to elastically move relative to the main pipe 21, and then the oil liquid pushes the inner thin head 32 into the auxiliary pipe 31. The inner thick head 22 and the inner thin head 32 elastically move relative to the main pipe 21 and the auxiliary pipe 31 respectively to buffer the reverse impact of the oil liquid.

[0045] A plurality of tooth grooves 34 are arranged on the outer ring surface of the coarse linkage rod 23. The number of tooth grooves 34 is the same as that of the auxiliary buffer assembly 3. The inside of the tooth groove 34 is composed of a plurality of equidistantly distributed teeth. The side of the teeth in the tooth groove 34 close to the inner thick head 22 is an inclined surface. The other side of the teeth in the tooth groove 34 is a vertical surface. The inside of the tooth groove 34 is engaged with a tooth block 35. The tooth block 35 is elastically connected with the main pipe 21. The tooth block 35 and the main pipe 21 are elastically connected through a vertically arranged elastic expansion rod. The tooth block 35 has a tendency to push the corresponding tooth groove 34 close to the tooth block 35. When the tooth block 35 is engaged with the tooth groove 34, the limiting coarse linkage rod 23 and the inner thick head 22 can only move outward of the main pipe 21 in one direction. The side of the tooth block 35 away from the axis of the main pipe 21 is fixed with a pull rope 36. The other end of the pull rope 36 slidingly penetrates the inner wall of the main pipe 21.

[0046] A plurality of pull ropes 36 are fixed one-to-one with a plurality of secondary pipes 31. A thin linkage rod 33 is fixed with a push bracket 37 at an outer end of the secondary pipe 31. A plurality of push brackets 37 are in one-to-one correspondence with a plurality of pull ropes 36, and are in contact with the side of the pull rope 36 away from the main pipe body 1. When the inner thin head 32 is not impacted by the oil, the inner thin head 32 pushes the pull rope 36 through the thin linkage rod 33 and the push bracket 37, and pulls the tooth block 35 away from the tooth groove 34. After the oil enters the secondary pipe 31 and pushes the inner thin head 32 away from the main pipe 21, the push bracket 37 no longer pushes the pull rope 36, and the tooth block 35 is engaged with the tooth groove 34 under the elastic connection with the main pipe 21, so that the inner thick head 22 can only be elastically connected in one direction, ensuring that the inner thick head 22 can only be reset after the oil in the secondary pipe 31 is discharged, preventing oil from remaining in the secondary pipe 31 and reducing the effect of the next buffer.

[0047] The outer side of the pull rope 36 is sleeved with two guide pipes 361, and the pull rope 36 slides inside the guide pipe 361. One of the guide pipes 361 is fixed with the main pipe 21, and the other guide pipe 361 is fixed with a sleeve ring 362. The sleeve ring 362 and the two guide pipes 361 limit the movement track of the pull rope 36.

[0048] A plurality of sleeve rings 362 are sleeved one-to-one on the outer side of a plurality of secondary pipes 31. The sleeve ring 362 can slide on the surface of the connected secondary pipe 31, and the sleeve ring 362 cannot rotate relative to the secondary pipe 31. The guide pipe 361 connected with the sleeve ring 362 and the adjacent push bracket 37 are in contact, and when the push bracket 37 moves, it can stably push the corresponding guide pipe 361 to tighten the pull rope 36, and then pull the tooth block 35 away from the corresponding tooth groove 34. The inner thick head 22 can be reset.

[0049] A power return mechanism 5 is installed on the outer side of the bend pipe body 1 to control the reset of the main buffer assembly 2 and the secondary buffer assembly 3.

[0050] The power return mechanism 5 includes a power telescopic rod 51, a displacement sensing controller 52, and a sleeve 53. The displacement sensing controller 52 is in sliding contact with the outer side of the horizontal rod 42. The power telescopic rod 51 is preferably an electric telescopic rod. When the displacement sensing controller 52 senses that the horizontal rod 42 moves to the left, it controls the power telescopic rod 51 to extend or retract once. The extension end of the power telescopic rod 51 is fixed with the sleeve 53, and the other end is installed on the outer side of the bend pipe body 1. After the water hammer effect disappears, the flow detection ring 41 moves away from the end of the main pipe 21 under the normal flow of the oil and the elasticity of the horizontal rod 42 and the bend pipe body 1, and drives the horizontal rod 42 to disengage from the through groove 46. When the displacement sensing controller 52 detects that the horizontal rod 42 moves away from the main pipe 21, it controls the power telescopic rod 51 to extend or retract once to drive the sleeve 53 to move towards the bend pipe body 1 and then reset away from the bend pipe body 1.

[0051] The rough linkage rod 23 is located outside the main pipe 21 and is provided with an elastic return rope 55 at one end. The other end of the elastic return rope 55 is fixed to the sleeve frame 53. The elastic return rope 55 can be elastically stretched. The elasticity of the elastic return rope 55 can pull the inner thick head 22 to push the oil in the main pipe 21 out.

[0052] The sleeve frame 53 is provided with a plurality of push rods 56 on the outer ring side. The number of the push rods 56 is the same as that of the auxiliary pipes 31. The push frame 37 is provided with a vertical rod 54 on one side. The plurality of push rods 56 are distributed one by one on one side of the plurality of vertical rods 54. When the push rod 56 moves with the sleeve frame 53 to one side of the elbow pipe body 1, it can push the corresponding vertical rod 54 to move.

[0053] When the sleeve frame 53 is moved to the elbow pipe body 1 by the power telescopic rod 51, the sleeve frame 53 pulls the elastic return rope 55. At the same time, the push rod 56 pushes the push frame 37 to move through the vertical rod 54. Before the inner thin head 32 is reset, the rough linkage rod 23 cannot move due to the engagement of the tooth block 35 and the tooth groove 34. The elastic return rope 55 is first elastically stretched. The push frame 37 pushes the inner thin head 32 to push the oil on the inside of the auxiliary pipe 31 out through the thin linkage rod 33. After the push frame 37 pushes the pull rope 36 to be taut, the tooth block 35 is pulled away from the tooth groove 34. The inner thick head 22 gradually pushes the oil on the inside of the main pipe 21 out under the elastic connection of the elastic return rope 55 and the main pipe 21. When the positioning block 47 moves to one side of the main pipe 21, the inclined surface on the upper end of the positioning block 47 contacts the lower end of the limiting vertical block 45. The limiting vertical block 45 is first pushed to move upward. The limiting vertical block 45 slides on the upper surface of the positioning block 47 and is then inserted into the groove. The position of the inner thick head 22 and the rough linkage rod 23 is fixed. Preparation is made for the impact of the next water hammer effect.

[0054] The end of the push frame 37 away from the connected thin linkage rod 33 is provided with a rotating wheel 371. The rotating wheel 371 is in rolling contact with the adjacent guide pipe 361. The rotating wheel 371 reduces the abrasion of the movement of the push frame 37 in contact with the guide pipe 361.

[0055] The working principle is as follows: when the pipeline valve is closed and the internal oil generates water hammer effect, the liquid flow direction detection assembly 4 detects the reverse impact of the oil. The oil can enter the main buffer assembly 2 and the auxiliary buffer assembly 3. The main buffer assembly 2 and the auxiliary buffer assembly 3 buffer the reverse impact of the oil through elastic contraction. The damage of the water hammer effect to the elbow pipe body 1 and the pipeline is reduced. After the water hammer effect disappears, the power return mechanism 5 controls the main buffer assembly 2 and the auxiliary buffer assembly 3 to reset. The internal oil is pushed out. It is used to cope with the impact of the next water hammer effect.

[0056] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made in the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A bend connector for oil lines, comprising a bend body (1), characterised in that: The bent pipe body (1) is bent and arranged, one end of the bent pipe body (1) is an oil inlet end, the other end of the bent pipe body (1) is an oil outlet end, a main buffer assembly (2) is installed at the bent part of the bent pipe body (1), and the main buffer assembly (2) is coaxially arranged on one side of the oil outlet end of the bent main pipe (21); A plurality of auxiliary buffer assemblies (3) are installed outside the main buffer assembly (2), and the main buffer assembly (2) and the auxiliary buffer assembly (3) are elastically contractible, and oil in the bent pipe body (1) can enter the main buffer assembly (2) and the auxiliary buffer assembly (3); The bent pipe body (1) is internally provided with a liquid flow direction detection assembly (4) which can detect the oil liquid after backflow and enable the oil liquid to enter the main buffer assembly (2) internally; The bent pipe body (1) is externally provided with a power return mechanism (5) for controlling the return of the main buffer assembly (2) and the auxiliary buffer assembly (3).

2. A bend connector for oil lines as claimed in claim 1, characterized in that: The main buffer assembly (2) comprises a main pipe (21) and an inner thick head (22), the inner thick head (22) is sealingly and slidingly inserted outside the main pipe (21), the inner thick head (22) is elastically connected with the main pipe (21), the inner side of the main pipe (21) is provided with a thick linkage rod (23), one end of the thick linkage rod (23) is coaxially fixed with the inner thick head (22), the other end of the inner thick head (22) penetrates the inner wall of the main pipe (21) coaxially, and the inner thick head (22) can slide coaxially relative to the main pipe (21); The auxiliary buffer assembly (3) is installed on the circumferential surface of the main pipe (21).

3. A bend connector for oil lines as defined in claim 2, characterized in that: The auxiliary buffer assembly (3) is arranged at an acute angle with the axis of the main pipe (21) on the upper side of the axis, and a plurality of auxiliary buffer assemblies (3) are evenly arranged in a circumferential array around the axis of the main pipe (21).

4. A bend connector for oil lines according to claim 3, characterized in that: The liquid flow direction detection assembly (4) comprises a flow detection ring (41) and a horizontal rod (42), the flow detection ring (41) is slidingly and insertingly arranged inside the bent pipe body (1), the horizontal rod (42) is located outside the bent pipe body (1), an inner cavity block (43) is installed outside the bent pipe body (1) at the flow detection ring (41), the inner cavity block (43) is in communication with the inside of the bent pipe body (1), a sliding block (44) is fixed to the outer ring surface of the flow detection ring (41), and the sliding block (44) is slidingly and insertingly arranged inside the inner cavity block (43); One end of the horizontal rod (42) slidingly penetrates the side surface of the inner cavity block (43), the sliding block (44) is fixed with the horizontal rod (42), the horizontal rod (42) is elastically connected with the outside of the bent pipe body (1), a limiting vertical block (45) is arranged on the side of the horizontal rod (42) away from the sliding block (44), and a through groove (46) is formed in the side of the limiting vertical block (45) close to the horizontal rod (42); A positioning clamping block (47) is arranged on the lower side of the limiting vertical block (45), the positioning clamping block (47) is fixedly sleeved on the thick linkage rod (23) at the outer end of the main pipe (21), a recess is formed in the upper end of the positioning clamping block (47) and matched with the lower end of the limiting vertical block (45), the limiting vertical block (45) is elastically connected with the outer surface of the main pipe (21), and the limiting vertical block (45) moves up and down relative to the main pipe (21). The flow detection ring (41) is arranged in a conical shape on the inner ring surface of one end of the main pipe (21), and a sealing plate (48) is arranged on the side of the flow detection ring (41) away from the main pipe (21), and the sealing plate (48) is in sealing contact with the inner wall of the elbow pipe body (1).

5. A bend connector for oil lines as defined in claim 4, characterized in that: The auxiliary buffering assembly (3) comprises an auxiliary pipe (31) and an inner thin head (32), the inner thin head (32) is sealingly and slidingly inserted into the inner side of the auxiliary pipe (31), the inner thin head (32) is elastically connected with the auxiliary pipe (31), a thin linkage rod (33) is arranged on the inner side of the auxiliary pipe (31), the thin linkage rod (33) is coaxially arranged with the inner thin head (32), and the other end of the thin linkage rod (33) slidingly penetrates the inner wall of the auxiliary pipe (31).

6. A bend connector for oil lines as defined in claim 5, characterized in that: The outer ring surface of the thick linkage rod (23) is provided with a plurality of tooth grooves (34), the number of the tooth grooves (34) is the same as that of the auxiliary buffering assemblies (3), the inside of the tooth groove (34) is composed of a plurality of equidistantly distributed teeth, the teeth in the tooth groove (34) are inclined surfaces close to the inner thick head (22), the other sides of the teeth in the tooth groove (34) are vertical surfaces, the inside of the tooth groove (34) is meshed with a tooth block (35), the tooth block (35) is elastically connected with the main pipe (21), a pull rope (36) is fixed on the side of the tooth block (35) away from the axis of the main pipe (21), and the other end of the pull rope (36) slidingly penetrates the inner wall of the main pipe (21); A plurality of pull ropes (36) are fixed in one-to-one correspondence with a plurality of auxiliary pipes (31), and a push frame (37) is fixed on the outer end of the thin linkage rod (33) located outside the auxiliary pipe (31); a plurality of push frames (37) are in one-to-one correspondence with a plurality of pull ropes (36) on the side away from the elbow pipe body (1).

7. A bend connector for oil lines as defined in claim 6, characterized in that: The outer side of the pull rope (36) is sleeved with two guide pipes (361), the pull rope (36) slides in the guide pipe (361), one of the guide pipes (361) is fixed with a sleeve ring (362), and the other guide pipe (361) is fixed with a sleeve ring (362); A plurality of sleeve rings (362) are sleeved on the outer sides of a plurality of auxiliary pipes (31) in one-to-one correspondence, the sleeve ring (362) can slide on the surface of the connected auxiliary pipe (31), and the guide pipe (361) connected with the sleeve ring (362) is in contact with the adjacent push frame (37).

8. A bend connector for oil lines according to claim 7, characterized in that: The end of the push frame (37) away from the connected thin linkage rod (33) is provided with a rotating wheel (371), and the rotating wheel (371) is in rolling contact with the adjacent guide pipe (361).

9. A bend connector for oil lines as defined in claim 4, characterized in that: The through groove (46) is arranged in an inclined surface close to the side of the horizontal rod (42), the end of the horizontal rod (42) close to the through groove (46) is in a semispherical shape, when the vertical block (45) is positioned at the highest position, the horizontal rod (42) is in contact with the inclined surface part of the through groove (46) in horizontal movement, and the upper end of the positioning clamping block (47) is arranged in an inclined surface close to the side of the main pipe (21).

10. A bend connector for oil lines as defined in claim 7, characterized in that: The power return mechanism (5) comprises a power telescopic rod (51), a displacement sensing controller (52) and a sleeve frame (53), the displacement sensing controller (52) is in sliding contact with the outer side of the horizontal rod (42), when the displacement sensing controller (52) senses that the horizontal rod (42) moves to the left, the power telescopic rod (51) is controlled to extend or retract once, the extension end of the power telescopic rod (51) is fixed with the sleeve frame (53), the other end of the power telescopic rod (51) is installed on the outer side of the elbow pipe body (1), the coarse linkage rod (23) is installed with an elastic return rope (55) at the outer end of the main pipe (21), the other end of the elastic return rope (55) is fixed with the sleeve frame (53); A plurality of push rods (56) are installed on the outer ring side of the sleeve frame (53), the number of the push rods (56) is the same as that of the sub-pipes (31), a vertical rod (54) is installed on one side of the push frame (37), a plurality of push rods (56) are distributed on one side of the plurality of vertical rods (54) one by one, when the push rod (56) moves to the side of the elbow pipe body (1) along with the sleeve frame (53), the corresponding vertical rod (54) can be pushed to move.

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