Intelligent automatic ball collecting device for wax removal balls in oil pipeline

Abstract

The application discloses an intelligent automatic ball collecting device for wax removal balls in an oil pipeline, which comprises a crude oil conveying pipeline and a ball collecting device arranged on the crude oil conveying pipeline, the ball collecting device comprises a ball separating box, a blocking piece and a conveying assembly for recycling the wax removal balls, wherein the wax removal balls are pushed into the conveying assembly when the blades are rotated by the impact of the crude oil; the conveying assembly comprises a first pressure reducing ball guiding assembly, a second pressure reducing ball guiding assembly, a third pressure reducing ball guiding assembly and a recycling system which are sequentially communicated. The application relates to the technical field of oil exploitation, collection and transportation, and realizes effective separation and stable conveying of the wax removal balls in the crude oil conveying process through the innovative design of the ball separating box. The pressure in the conveying assembly is gradually reduced through the design of the first, second and third pressure reducing ball guiding assemblies. The segmented blocking mode ensures the smooth transition of the wax removal balls from high pressure to low pressure and finally to the pressureless state, simplifies the operation process and eliminates the need for reversing the bypass pipeline, pressure releasing or opening the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil production and transportation, in particular to an intelligent automatic ball collecting device for wax removal balls in an oil pipeline. BACKGROUND

[0002] In the field of oil production and transportation, the flow of crude oil in the pipeline is often accompanied by the deposition of wax, which can reduce the efficiency of pipeline transportation and even cause blockage. The solution is to add rubber wax removal balls at the well group during oil gathering and transportation to dredge the pipeline and improve oil production efficiency. However, the wax removal balls need to be effectively recovered before the heating furnace at the booster station to avoid affecting the downstream oil transportation equipment after melting. Effective wax removal ball injection and recovery not only improves oil transportation efficiency but also reduces oil production cost.

[0003] Currently, there are fast ball collecting devices on the market. During the ball collecting process, bypassing is needed, and then the cavity is emptied, the cover is opened, and the basket is taken out for recovery. The recovery operation is complicated, labor-intensive, and the automatic control means is not high.

[0004] Therefore, there is an urgent need for a device that can automatically inject and collect balls, is easy to operate, has low operating cost, and has explosion-proof characteristics. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides an intelligent automatic ball collecting device for wax removal balls in an oil pipeline, which solves the problem of complicated operation caused by equipment design during the recovery process of the existing wax removal balls.

[0006] To achieve the above-mentioned purpose, the present application is implemented by the following technical scheme: an intelligent automatic ball collecting device for wax removal balls in an oil pipeline, comprising a crude oil conveying pipeline and a ball collecting device arranged thereon, the ball collecting device comprising:

[0007] a ball distributing box, the inside of the ball distributing box being rotatably connected with a blade;

[0008] a blocking piece arranged at the connection between the ball distributing box and the outflow section of the crude oil conveying pipeline, which blocks the movement of the wax removal balls in the direction of the outflow section of the crude oil conveying pipeline;

[0009] a conveying assembly for recovering the wax removal balls connected to the ball distributing box; wherein the wax removal balls are pushed into the conveying assembly when the blade is rotated by the impact of crude oil;

[0010] The conveying assembly comprises a first pressure reduction ball guiding assembly, a second pressure reduction ball guiding assembly, a third pressure reduction ball guiding assembly and a recovery system connected in sequence, and the first pressure reduction ball guiding assembly, the second pressure reduction ball guiding assembly and the third pressure reduction ball guiding assembly segmentally block and reduce the pressure of the wax removal balls and the oil liquid and recover them into the recovery system.

[0011] Preferably, the blade comprises a main shaft rotatably connected to the ball distributing box, and a blade body circumferentially distributed on the main shaft, wherein the blade body comprises a blade root and a blade tip, the blade root is fixed on the main shaft, and an upper segment and a lower segment are formed at the outer edge of the blade tip;

[0012] In the top view projection, the distance between the upper segment and the blade root is A, and the distance between the lower segment and the blade root is B, A < B.

[0013] Preferably, the blade body is a twisted blade with a twisted surface, a first twisted surface is formed between the upper segment and the blade root, a second twisted surface is formed between the lower segment and the blade root, and the twist directions of the first twisted surface and the second twisted surface are opposite;

[0014] Wherein, a ball pressing part is formed on the first twisted surface of the blade body, and a ball pushing part is formed on the second twisted surface of the blade body, the ball pressing part presses the wax cleaning ball towards the ball pushing part, and the wax cleaning ball is moved in the ball distributing box by the ball pushing part.

[0015] Preferably, the first pressure reducing and guiding ball assembly comprises:

[0016] a ball receiving box, the top and bottom of the ball receiving box are respectively provided with a ball inlet and a ball outlet, and the ball inlet is communicated with the ball distributing box through a first guide pipe;

[0017] a guide plate rotatably connected in the ball receiving box, and the guide plate can be driven to rotate in a first direction by a first motor;

[0018] Wherein, a ball receiving groove receiving the wax cleaning ball and a blocking part blocking the ball inlet and the ball outlet are sequentially arranged along the circumference of the guide plate;

[0019] The blocking part comprises a blocking panel formed on the guide plate, and the blocking panel is circumferentially provided with a sealing ring.

[0020] Preferably, a guide blocking piece is arranged at the communication position of the first guide pipe and the ball distributing box, the guide blocking piece comprises a blocking piece and a clamping assembly fixing the blocking piece;

[0021] The blocking piece comprises a plurality of arc-shaped plates, the plurality of arc-shaped plates can be enclosed into a perfect circle body through elastic tightening rings, one end of each arc-shaped plate is provided with an arc-shaped insertion hole, and the other end is provided with an arc-shaped insertion rod matched with the arc-shaped insertion hole;

[0022] The inner wall surface of each arc-shaped plate is provided with a plurality of layers of inner elastic retaining rings, and the bottom of each arc-shaped plate is provided with a bottom elastic retaining ring; the outer side of the arc-shaped plate is provided with a supporting piece, and a V-shaped elastic piece is arranged between the supporting piece and the bottom elastic retaining ring;

[0023] The outer side of the arc-shaped plate is provided with a side plate, which is movably connected in the clamping assembly.

[0024] Preferably, the clamping assembly comprises an upper annular plate and a lower annular plate fixed with each other, the top surface of the lower annular plate extends upward to form an outer sealing plate, and the upper annular plate, the lower annular plate and the outer sealing plate form a cavity with three closed sides and one open side; wherein the side plate is movably connected in the cavity.

[0025] Preferably, the second pressure-reducing ball guide assembly comprises a shell with flange openings at both ends, and one end of the shell is connected to the ball outlet of the first pressure-reducing ball guide assembly through a second guide pipe.

[0026] The inner part of the shell is rotatably connected with a blocking body, and a second motor is arranged on the shell to drive the blocking body to rotate in the shell; a receiving cavity is arranged at the first opposite end of the blocking body, which transfers the wax removal balls from one flange opening to the other flange opening, and a plugging part is arranged at the second opposite end of the blocking body, which can close the two flange openings; the first opposite end and the second opposite end form a cross shape in the left view projection.

[0027] Preferably, the third pressure-reducing ball guide assembly comprises an electric control valve, one end of which is connected to the shell through a temporary storage pipe, and the other end of which is connected with a third guide pipe.

[0028] Preferably, the recycling system comprises a liquid collecting tank and a ball collecting box, the third guide pipe is connected to the liquid collecting tank, and the liquid collecting tank and the ball collecting box are connected by a fourth guide pipe and a first oil return pipe.

[0029] In the liquid collecting tank, a punching pipe is connected between the fourth guide pipe and the third guide pipe, so that the wax removal balls and oil liquid in the third guide pipe are separated when passing through the punching pipe.

[0030] The liquid collecting tank is connected to the outflow section of the crude oil conveying pipeline through a second oil return pipe, and a hand valve and a one-way valve are arranged on the second oil return pipe.

[0031] Preferably, the device further comprises a control system, which comprises a PLC automatic control box, a height detection sensor, an electric control valve, a first booster pump, a second liquid level detection element, a first liquid level detection element and a second booster pump, and the height detection sensor, the electric control valve, the first motor and the second motor, and the first booster pump, the second liquid level detection element, the first liquid level detection element and the second booster pump are electrically connected with the PLC automatic control box.

[0032] The height detection sensor is fixed to the top of the inner cavity of the temporary storage tube; the electric control valve is installed on the fourth guide tube; the first booster pump is installed on the first return oil pipe; the second liquid level detection element and the first liquid level detection element are respectively installed in the liquid receiving tank and the ball receiving box; the second booster pump is installed on the second return oil pipe.

[0033] The beneficial effects of this invention are as follows: By using the intelligent automatic dewaxing ball collection device for oil pipelines provided by this invention, and through the innovative ball distribution box design, effective separation and stable transportation of dewaxing balls are achieved during crude oil transportation. Utilizing the rotation of the blades under the impact of flowing crude oil, not only is the separation efficiency of the dewaxing balls improved, but the design of the first, second, and third pressure-reducing guide ball assemblies also gradually reduces the pressure within the transportation assembly. This segmented isolation method ensures a smooth transition of the dewaxing balls from high pressure to low pressure, ultimately reaching a pressure-free state, effectively avoiding transportation instability and convergence difficulties caused by high-pressure impacts. Furthermore, this technical solution also achieves the purpose of sealed automatic ball collection, simplifying the operation process. It eliminates the need to bypass pipelines, release pressure, or open equipment, greatly improving operational convenience. Simultaneously, by reducing intervention and adjustments to the equipment, operating costs are reduced, and maintenance is more convenient. In summary, this invention not only improves the efficiency and stability of crude oil transportation but also reduces operating costs. Attached Figure Description

[0034] Figure 1 This is a structural diagram of the present invention;

[0035] Figure 2 This is a schematic diagram showing the flow direction of crude oil and dewaxing balls in this invention;

[0036] Figure 3 This is a schematic diagram of the blade structure of the present invention;

[0037] Figure 4 This is a side view of the first pressure-reducing ball guide assembly of the present invention;

[0038] Figure 5 This is a front view of the first pressure-reducing ball guide assembly of the present invention;

[0039] Figure 6 For the present invention Figure 3 Sectional view in;

[0040] Figure 7 For the present invention Figure 4 Sectional view in;

[0041] Figure 8 This is the guide plate of the present invention;

[0042] Figure 9 This is a three-dimensional structural diagram of the guide barrier of the present invention;

[0043] Figure 10 Fig. 1 is a schematic view of the arc-shaped plug and the arc-shaped socket structure of the present application;

[0044] Figure 11 Fig. 2 is a front view of the arc-shaped plate of the present application;

[0045] Figure 12 Fig. 3 is a schematic view of the guide ball state one structure of the second pressure-reducing guide ball assembly of the present application;

[0046] Figure 13 Fig. 4 is a schematic view of the guide ball state two structure of the second pressure-reducing guide ball assembly of the present application;

[0047] Figure 14 Fig. 5 is a front view of the blocking body of the present application;

[0048] Figure 15 Fig. 6 is a front view of the blocking member of the present application.

[0049] Explanation of reference numerals in the drawings

[0050] 1, crude oil conveying pipeline, 2, blocking member, 3, ball separating box, 4, blade, 41, main shaft, 42, blade tip, 43, blade root, 44, upper section, 45, lower section, 46, ball pushing part, 47, ball pressing part, 48, blade body, 5, first guide pipe, 6, first pressure-reducing guide ball assembly, 61, ball receiving box, 62, first motor, 63, guide plate, 64, ball receiving groove, 65, blocking panel, 66, sealing ring, 7, second guide pipe, 8, second pressure-reducing guide ball assembly, 81, second motor, 82, housing, 83, blocking body, 84, accommodating cavity, 85, blocking part, 9, temporary storage pipe, 10, third pressure-reducing guide ball assembly, 11, third guide pipe, 12, electrically controlled valve, 13, fourth guide pipe, 14, ball collecting box, 15, first liquid level detecting element, 16, first booster pump, 17, first oil return pipe, 18, punched pipe, 19, liquid collecting box, 20, second liquid level detecting element, 21, second booster pump, 22, second oil return pipe, 23, hand valve, 24, PLC automatic control box, 25, one-way valve, 26, guide blocking member, 26a, clamping assembly, 26a1, upper annular sheet, 26a2, lower annular sheet, 26a3, accommodating cavity, 26a4, outer blocking plate, 26b, blocking member, 26b1, arc-shaped plate, 26b2, arc-shaped plug, 26b3, arc-shaped socket, 26b4, side plate, 26b5, elastic tightening ring, 26b6, supporting sheet, 26b7, V-shaped elastic sheet, 26b8, bottom elastic blocking ring, 26b9, inner elastic blocking ring. DETAILED DESCRIPTION

[0051] 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. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. As long as the effects of the present application can be achieved, various changes can be made to the embodiments.

[0052] The components in the present application are sequentially connected by those skilled in the art, and the specific connection and operation sequence should be referred to the working principle below. The detailed connection means is a common technology in the art, and the working principle and process are mainly introduced below.

[0053] Referring to Figures 1-15 An intelligent automatic ball collecting device for wax removal balls in an oil pipeline is described.

[0054] As Figure 1 and Figure 2 shown, the device includes a crude oil pipeline 1 and a ball collecting device arranged thereon.

[0055] The ball collecting device includes a ball separating box 3, a blocking member 2 and a control system. The control system includes a PLC automatic control box 24. The crude oil pipeline 1 is connected to the ball separating box 3, so as to divide the crude oil pipeline 1 into an inflow section of the crude oil pipeline 1 and an outflow section of the crude oil pipeline 1. The crude oil and the wax removal balls enter the ball separating box 3 from the inflow section of the crude oil pipeline 1.

[0056] The blocking member 2 is arranged at the connection between the ball separating box 3 and the outflow section of the crude oil pipeline 1, so as to block the movement of the wax removal balls to the outflow section of the crude oil pipeline 1. The blocking member 2 can be a stainless steel punched plate or a mesh plate or a plurality of blocking rods arranged in a transverse, longitudinal or cross direction. The specific structure and material are not limited as long as the effect of blocking the wax removal balls from entering the outflow section of the crude oil pipeline 1 can be achieved. In the present embodiment, as Figure 15 shown, a stainless steel punched plate is preferably used. The number and shape of the openings are not limited, but the diameter of the openings should be smaller than the diameter of the wax removal balls to ensure that the wax removal balls cannot pass through the openings. In the implementation, the crude oil and the wax removal balls enter the ball separating box 3. The crude oil passes through the through holes of the stainless steel punched plate and flows into the outflow section of the crude oil pipeline 1 for further transportation, while the wax removal balls are blocked by the stainless steel punched plate and stay in the ball separating box 3.

[0057] As Figure 3As shown, a blade 4 is rotatably connected inside the ball-sorting box 3. The blade 4 includes a main shaft 41 rotatably connected to the ball-sorting box 3, and blade bodies 48 are circumferentially distributed on the main shaft 41. When crude oil enters the ball-sorting box 3, the flowing crude oil impacts on the blade 4, and the blade 4 rotates inside the ball-sorting box 3 due to the inflow impact force of the crude oil. The top of the main shaft 41 extends out of the ball-sorting box 3. When the blade 4 gets stuck, an external tool can be used to rotate the main shaft 41 to manually rotate the blade 4.

[0058] In one embodiment of the blade body 48, the blade body 48 includes a blade root 43 and a blade tip 42. The blade root 43 is fixed on the main shaft 41, and an upper section 44 and a lower section 45 are formed at the outer edge of the blade tip 42. In the projection of the top view, the distance between the upper section 44 and the blade root 43 is A, and the distance between the lower section 45 and the blade root 43 is B, where A < B. In design, the bottom width of the blade body 48 is greater than the top width, so that when the blade body 48 rotates, it is ensured that the bottom of the blade body 48 can move the wax-removing ball.

[0059] Furthermore, the blade body 48 is a twisted blade with a twisted surface. A first twisted surface is formed between the upper section 44 and the blade root 43, and a second twisted surface is formed between the lower section 45 and the blade root 43. The twisting directions of the first twisted surface and the second twisted surface are opposite. Among them, a ball-pressing part 47 is formed on the first twisted surface of the blade body 48, and a ball-poking part 46 is formed on the second twisted surface of the blade body 48. The ball-pressing part 47 presses the wax-removing ball towards the ball-poking part 46 and moves the wax-removing ball in the ball-sorting box 3 through the ball-poking part 46. During the rotation of the blade 4, the wax-removing ball located above will contact the ball-pressing part 47. As the blade 4 continues to rotate, the ball-pressing part 47 presses the wax-removing ball to the ball-poking part 46 at the bottom, ensuring that the bottom of the blade body 48 can move the wax-removing ball.

[0060] The ball receiving device further includes a conveying component for recovering the wax-removing balls, which is connected to the ball-sorting box 3. Among them, when the blade 4 is impacted by the crude oil and rotates, the wax-removing balls are poked into the conveying component. Specifically, when the wax-removing balls are poked, the ball-poking part 46 pokes the wax-removing balls into the conveying component to complete the separation of the wax-removing balls and the crude oil. [[ID=

[11] ]

[0061] As Figure 1 shown, the conveying component includes a first pressure-reducing ball-guiding component 6, a second pressure-reducing ball-guiding component 8, a third pressure-reducing ball-guiding component 10 and a recovery system that are connected in sequence. The first pressure-reducing ball-guiding component 6, the second pressure-reducing ball-guiding component 8, and the third pressure-reducing ball-guiding component segmentally block and decompress the wax-removing balls and the oil liquid and recover them into the recovery system. Since the crude oil has a conveying pressure during the conveying process, a segmented blocking method is adopted to gradually reduce the pressure in the conveying component, so that the wax-removing balls change from high pressure to low pressure and finally form a non-pressure state during the conveying process in the conveying component, enabling the wax-removing balls to form a stable conveying state and preventing them from being difficult to converge due to unstable conveying caused by high-pressure impact during the conveying process.

[0062] As Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 shown, in an embodiment of the first pressure reducing guide ball assembly 6, the first pressure reducing guide ball assembly 6 comprises a ball receiving box 61 and a guide plate 63. The top and bottom of the ball receiving box 61 are respectively provided with an inlet and an outlet, the inlet is communicated with the ball distributing box 3 through the first guide pipe 5, and a guide blocking piece 26 is arranged at the communication position of the first guide pipe 5 and the ball distributing box 3.

[0063] As Figure 9 , Figure 10 and Figure 11 shown, the guide blocking piece 26 comprises a blocking piece 26b and a clamping assembly 26a for fixing the blocking piece 26b; the blocking piece 26b comprises a plurality of arc-shaped plates 26b1, which can be enclosed into a perfect circle through an elastic tightening ring 26b5, one end of each arc-shaped plate 26b1 is provided with an arc-shaped insertion hole 26b3, and the other end is provided with an arc-shaped insertion rod 26b2 matched with the arc-shaped insertion hole 26b3.

[0064] The wax removal ball is driven to pass through the blocking piece 26b under the impact of the leaf blade 4 and the crude oil. In the process of passing through, the perfect circle enclosed by the plurality of arc-shaped plates 26b1 is lifted, and after passing through, the perfect circle enclosed by the plurality of arc-shaped plates 26b1 is tightened and closed again by the tightening force of the elastic tightening ring 26b5. In the opening and closing process of the perfect circle enclosed by the plurality of arc-shaped plates 26b1, the arc-shaped insertion rod 26b2 on one side of each arc-shaped plate 26b1 moves in the arc-shaped insertion hole 26b3 of the arc-shaped plate 26b1 on the other side, so that the perfect circle enclosed by the plurality of arc-shaped plates 26b1 always maintains the same shape.

[0065] The diameter of the closed perfect circle is smaller than the diameter of the wax removal ball. Under the double action of the small-diameter perfect circle and the wax removal ball continuing to fall above, the backwash formed when the falling wax removal ball is washed into the first guide pipe 5 by the crude oil is prevented from flowing back into the ball distributing box 3, and the orderly and normal conveying of the wax removal ball is ensured.

[0066] The inner wall surface of each arc-shaped plate 26b1 is provided with a plurality of inner elastic retaining rings 26b9, and the bottom of each arc-shaped plate 26b1 is provided with a bottom elastic retaining ring 26b8; the outer side of the arc-shaped plate 26b1 is provided with a supporting plate 26b6, and the supporting plate 26b6 and the bottom elastic retaining ring 26b8 are provided with a V-shaped elastic sheet 26b7. The inner elastic retaining ring 26b9 and the bottom elastic retaining ring 26b8 are both inclined downward, which ensures the normal passage of the wax removal ball and also prevents the wax removal ball from moving upward. Especially, the V-shaped elastic sheet 26b7 is arranged at the bottom of the bottom elastic retaining ring 26b8, so that the wax removal ball can compress the V-shaped elastic sheet 26b7 to deform when passing through the bottom elastic retaining ring 26b8, allowing the wax removal ball to fall normally. When the wax removal ball is moved upward by the back impact, it will be blocked by the bottom elastic retaining ring 26b8.

[0067] The outer side of the arc-shaped plate 26b1 is provided with a side plate 26b4, which is movably connected in the clamping assembly 26a. The clamping assembly 26a includes an upper annular plate 26a1 and a lower annular plate 26a2 that are fixedly buckled to each other, and the top surface of the lower annular plate 26a2 extends outwardly upward to form an outer sealing plate 26a4. The upper annular plate 26a1 and the lower annular plate 26a2 and the outer sealing plate 26a4 form a cavity 26a3 with three closed sides and one open side; wherein the side plate 26b4 is movably connected in the cavity 26a3. Since the plurality of arc-shaped plates 26b1 are continuously opened and reset buckled, a fixed cavity 26a3 with three closed sides and one open side is provided, so that the side plates 26b4 of the plurality of arc-shaped plates 26b1 move in the cavity 26a3, so that the plurality of arc-shaped plates 26b1 do not displace when repeatedly deformed.

[0068] The bottom ball poking portion 46 of the blade body 48 pokes the wax removal ball to the communication between the ball separating box 3 and the first guide pipe 5, and after passing through the guide blocking piece 26, the wax removal ball enters the guide plate 63 in the ball receiving box 61 from the first guide pipe 5.

[0069] The guide plate 63 is rotatably connected in the ball receiving box 61, and the guide plate 63 can be driven to rotate in a first direction by the first motor 62. The first motor 62 is electrically connected with the PLC automatic control box 24. The first motor 62 is a speed regulating motor, and the PLC automatic control box 24 controls the working speed and start-stop state of the first motor 62.

[0070] The guiding plate 63 is continuously rotated, when the ball receiving groove 64 is rotated to the top position, the wax removal ball in the first guiding pipe 5 falls into the ball receiving groove 64, at this time, the guiding plate 63 continues to rotate, when the blocking surface plate 65 contacts the first guiding pipe 5, the first guiding pipe 5 is blocked, at this time, the high pressure of the crude oil at the first guiding pipe 5 is blocked in the first stage. The continuous rotation of the guiding plate 63 realizes the removal and guiding of the wax removal ball. Moreover, by adopting the design manner, the loss of the pressure in the crude oil conveying pipeline 1 can be reduced, and the pressure in the second guiding pipe 7 is reduced, so that the wax removal ball is changed from the high pressure state to the low pressure state when being conveyed by the crude oil.

[0071] As shown in Figure 12 、 Figure 13 and Figure 14 , the second pressure reducing guide ball assembly 8 comprises a shell 82 with flange openings at two ends, one end of the shell 82 is connected with the ball outlet of the first pressure reducing guide ball assembly 6 through the second guiding pipe 7; the crude oil and the wax removal ball falling through the first pressure reducing guide ball assembly 6 fall into the second guiding pipe 7, and then fall into the second pressure reducing guide ball assembly 8 through the second guiding pipe 7, to realize the second stage of pressure reduction and conveying process.

[0072] The inside of the shell 82 is rotationally connected with a blocking body 83, the shell 82 is provided with a second motor 81, the second motor 81 is electrically connected with the PLC automatic control box 24, and the second motor 81 drives the blocking body 83 to rotate in the shell 82; a containing cavity 84 is arranged at a first opposite end of the blocking body 83, the containing cavity 84 transfers the wax removal ball from one flange opening to the other flange opening, a blocking part 85 is arranged at a second opposite end of the blocking body, the blocking part 85 can close the two flange openings; the first opposite end and the second opposite end are in the shape of “cross” in the left view projection.

[0073] The second motor 81 is a speed regulating motor, which drives the blocking body 83 to continuously rotate in one direction. The wax removal ball in the second guiding pipe 7 falls to the surface of the blocking body 83 in the low pressure state, falls into the containing cavity 84 with the rotation of the blocking body 83, and freely falls into the temporary storage pipe 9 when continuously rotating. After the containing cavity 84 receives the wax removal ball, the blocking part 85 blocks the second guiding pipe 7, so that the pressure cannot be transmitted into the temporary storage pipe 9, so that the temporary storage pipe 9 realizes the state of low pressure or even no pressure.

[0074] The third pressure reducing guide ball assembly 10 comprises an electric control valve which is electrically connected with the PLC automatic control box 24. One end of the electric control valve is connected with the shell 82 through a temporary storage pipe 9, and a height detection sensor is fixed at the top of the inner cavity of the temporary storage pipe 9 and electrically connected with the PLC automatic control box 24. The other end of the electric control valve is connected with a third guide pipe 11. The height detection sensor is a height position detection element for detecting the height of the accumulated wax removal balls on the top surface of the temporary storage pipe 9. When the accumulated height of the wax removal balls in the temporary storage pipe 9 reaches the detection position of the height detection sensor, the electric control valve is opened to make all the wax removal balls in the temporary storage pipe 9 fall off. During the closing process of the electric control valve, the residual low pressure in the temporary storage pipe 9 is completely blocked, the stable transportation of the wax removal balls is ensured, and the purpose of automatic sealing and ball collection is achieved, without the need of reversing the bypass pipeline and releasing pressure. The height detection sensor is a radar level meter. When the wax removal balls fall off and continuously accumulate, the radar level meter emits detection microwaves on the wax removal balls on the top surface and returns to detect the distance between the uppermost wax removal ball and the height detection sensor, so as to achieve the effect of measuring the height of the wax removal balls. This technology is a mature existing technology, and the accumulated height of the wax removal balls in the temporary storage pipe 9 can be detected. The specific signal and type are not described in detail here.

[0075] As shown in Figure 1 The recovery system of the conveying assembly comprises a liquid collecting tank 19 and a ball collecting box 14, the third guide pipe 11 is communicated with the liquid collecting tank 19, the inner wall surface of the ball collecting box 14 is provided with a first liquid level detection element 15, the inner wall surface of the liquid collecting tank 19 is provided with a second liquid level detection element 20, and the second liquid level detection element 20 and the first liquid level detection element 15 are electrically connected with the PLC automatic control box 24. The second oil return pipe 22 is further provided with a second booster pump 21, and the second booster pump 21 is electrically connected with the PLC automatic control box 24.

[0076] The first liquid level detection element 15 is communicated between the liquid collecting tank 19 and the ball collecting box 14 through a fourth guide pipe 13 and a first oil return pipe 17, the first oil return pipe 17 is provided with a first booster pump 16, and the first booster pump 16 is electrically connected with the PLC automatic control box 24. The fourth guide pipe 13 is provided with an electric control valve 12, and the electric control valve 12 is electrically connected with the PLC automatic control box 24.

[0077] In the liquid collecting tank 19, the fourth guide pipe 13 and the third guide pipe 11 are connected with a punching pipe 18, so that the wax removal balls and the petroleum liquid in the third guide pipe 11 are separated when passing through the punching pipe 18.

[0078] The wax removal balls and the crude oil enter the punching pipe 18 in the liquid collecting tank 19 from the third guide pipe 11. The crude oil falls into the liquid collecting tank 19 through the through hole of the punching pipe 18, and the wax removal balls enter the fourth guide pipe 13 from the punching pipe 18 and finally fall into the ball collecting box 14, so as to separate the crude oil and the wax removal balls and realize the sealed recovery of the wax removal balls.

[0079] The collecting tank 19 is connected with the outflow section of the crude oil conveying pipeline 1 through the second oil return pipe 22, and the second oil return pipe 22 is provided with a manual valve 23 and a one-way valve 25;

[0080] The wax removal balls fall into the ball collecting box 14, and the crude oil falls into the collecting tank 19. Since the wax removal balls will wrap a certain amount of crude oil, when the crude oil in the ball collecting box 14 accumulates to a predetermined height, the first booster pump works to convey the crude oil in the ball collecting box 14 into the collecting tank 19. When the crude oil in the collecting tank 19 accumulates to a predetermined height, the second booster pump 21 works to boost the crude oil in the collecting tank 19 and convey it into the second oil return pipe 22 and back to the outflow section of the crude oil conveying pipeline 1.

[0081] Working principle: The crude oil and the wax removal balls enter the ball separating box 3 from the inflow section of the crude oil conveying pipeline 1, the blocking piece 2 blocks the wax removal balls to prevent them from entering the outflow section of the crude oil conveying pipeline 1 and making them stay in the ball separating box 3; while the crude oil continues to flow forward and enters the outflow section of the crude oil conveying pipeline 1. When the crude oil enters the ball separating box 3, the flowing crude oil impacts on the blade 4, and the inflow impact force of the crude oil makes the blade 4 rotate in the ball separating box 3. In the process of rotation of the blade 4, the wax removal balls located above contact the ball pressing part 47, and with the continuous rotation of the blade 4, the ball pressing part 47 presses the wax removal balls to the ball pushing part 46 at the bottom, and the ball pushing part 46 pushes the wax removal balls into the first guide pipe 5.

[0082] The wax removal balls are pushed by the blade 4 and the impact of the crude oil, and are driven to pass through the blocking piece 26b and enter the first guide pipe 5; at this time, the wax removal balls continue to fall on the small-diameter right circular body, and the fourfold blocking of the inner elastic stop ring 26b9 and the bottom elastic stop ring 26b8 is combined to prevent the back impact of the wax removal balls from flowing into the first guide pipe 5.

[0083] The wax removal balls and the crude oil in the first guide pipe 5 enter the ball receiving groove 64 of the guide plate 63 in the ball receiving box 61, at this time the guide plate 63 continues to rotate, and when the sealing panel 65 contacts the first guide pipe 5, it will block it, at this time the high pressure of the crude oil at the first guide pipe 5 will be blocked in the first stage; after continuous rotation, the wax removal balls and the crude oil in the ball receiving groove 64 fall into the second guide pipe 7.

[0084] The wax removal balls and the crude oil fall into the containing cavity 84 of the blocking body 83 in the second pressure-reducing ball guide assembly 8 from the second guide pipe 7, and continue to fall freely into the temporary storage pipe 9 when rotating. While the containing cavity 84 blocks the second guide pipe 7 after receiving the wax removal balls, the sealing part 85 blocks the second guide pipe 7, so that the pressure cannot be transmitted to the temporary storage pipe 9, and the temporary storage pipe 9 realizes a low-pressure or even no-pressure state.

[0085] When the accumulated height of the wax balls and crude oil reaches the detection position of the height detection sensor, the electric control valve is opened to make all the wax balls in the temporary storage tube 9 fall into the third guide tube 11, and then enter the perforated tube 18 in the liquid collecting tank 19 from the third guide tube 11. At this time, the crude oil falls into the liquid collecting tank 19 through the through hole of the perforated tube 18, and the wax balls enter the fourth guide tube 13 from the perforated tube 18 and finally fall into the ball collecting box 14, realizing the separation of the crude oil and the wax balls and the sealed recovery of the wax balls.

[0086] Finally, when the crude oil in the ball collecting box 14 accumulates to a predetermined height, the first booster pump works to transport the crude oil in the ball collecting box 14 to the liquid collecting tank 19. When the crude oil in the liquid collecting tank 19 accumulates to a predetermined height, the second booster pump 21 works to transport the crude oil in the liquid collecting tank 19 to the second oil return tube 22 and back to the outflow section of the crude oil delivery pipeline 1.

[0087] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An intelligent automatic ball collecting device for wax removal balls in an oil pipeline, comprising a crude oil conveying pipeline (1) and a ball collecting device arranged thereon, characterized in that, The ball collecting device comprises: A ball distributing box (3) is internally connected with a vane (4); A blocking piece (2) is arranged at the connecting position of the ball distributing box (3) and the outflow section of the crude oil conveying pipeline (1), and blocks the movement of the wax removal balls to the outflow section of the crude oil conveying pipeline (1); A conveying assembly for recycling the wax removal balls is connected to the ball distributing box (3); when the vane (4) is rotated by the impact of the crude oil, the wax removal balls are pushed into the conveying assembly; The conveying assembly comprises a first pressure reduction ball guiding assembly (6), a second pressure reduction ball guiding assembly (8), a third pressure reduction ball guiding assembly (10) and a recycling system which are sequentially connected, and the first pressure reduction ball guiding assembly (6), the second pressure reduction ball guiding assembly (8) and the third pressure reduction ball guiding assembly (10) segmentally block and pressure reduce the wax removal balls and the oil liquid and recycle them into the recycling system; The first pressure reduction ball guiding assembly (6) comprises: A ball receiving box (61) is provided with a ball inlet and a ball outlet at the top and the bottom respectively, and the ball inlet is connected with the ball distributing box (3) through a first guide pipe (5); A guide plate (63) is rotatably connected in the ball receiving box (61), and the guide plate (63) can be driven to rotate in a first direction by a first motor (62); A ball receiving groove (64) for receiving the wax removal balls and a blocking part for blocking the ball inlet and the ball outlet are sequentially arranged along the circumference of the guide plate (63); The blocking part comprises a blocking panel (65) formed on the guide plate (63), and the blocking panel (65) is provided with a sealing ring (66) in the circumference; A guide blocking piece (26) is arranged at the connecting position of the first guide pipe (5) and the ball distributing box (3), and the guide blocking piece (26) comprises a blocking piece (26b) and a clamping assembly (26a) for fixing the blocking piece (26b); The blocking piece (26b) comprises a plurality of arc-shaped plate pieces (26b1), the arc-shaped plate pieces (26b1) can be enclosed into a perfect circle through elastic tightening rings (26b5), one end of each arc-shaped plate piece (26b1) is provided with an arc-shaped insertion hole (26b3), and the other end is provided with an arc-shaped insertion rod (26b2) matched with the arc-shaped insertion hole (26b3); The inner wall surface of each arc-shaped plate piece (26b1) is provided with a plurality of layers of inner elastic retaining rings (26b9), and the bottom of each arc-shaped plate piece (26b1) is provided with a bottom elastic retaining ring (26b8); the outer side of the arc-shaped plate piece (26b1) is provided with a supporting piece (26b6), and the supporting piece (26b6) and the bottom elastic retaining ring (26b8) are provided with a V-shaped elastic piece (26b7); The outer side of the arc-shaped plate piece (26b1) is provided with a side plate (26b4), and the side plate (26b4) is movably connected in the clamping assembly (26a). The clamping assembly (26a) comprises an upper annular plate (26a1) and a lower annular plate (26a2) which are fixed to each other, an outer sealing plate (26a4) is formed on the top surface of the lower annular plate (26a2) and extends upward, and the upper annular plate (26a1), the lower annular plate (26a2) and the outer sealing plate (26a4) form a cavity (26a3) which is closed on three sides and open on one side.

2. The intelligent automatic ball collecting device for wax removal balls in an oil pipeline according to claim 1, characterized in that: The blade (4) comprises a main shaft (41) rotatably connected to the ball distributing box (3), and a blade body (48) is circumferentially distributed on the main shaft (41), wherein the blade body (48) comprises a blade root (43) and a blade tip (42), the blade root (43) is fixed on the main shaft (41), and an upper segment (44) and a lower segment (45) are formed at the outer edge of the blade tip (42). In a top view projection, the distance between the upper segment (44) and the blade root (43) is A, and the distance between the lower segment (45) and the blade root (43) is B, and A < B.

3. The intelligent automatic ball collecting device for wax removal balls in an oil pipeline according to claim 2, characterized in that: The blade body (48) is a twisted blade with a twisted surface, a first twisted surface is formed between the upper segment (44) and the blade root (43), and a second twisted surface is formed between the lower segment (45) and the blade root (43), and the twisting directions of the first twisted surface and the second twisted surface are opposite. A ball pressing part (47) is formed on the first twisted surface of the blade body (48), and a ball pushing part (46) is formed on the second twisted surface of the blade body (48), the ball pressing part (47) presses the wax removing ball towards the ball pushing part (46) and moves the wax removing ball in the ball distributing box (3) through the ball pushing part (46).

4. The intelligent automatic ball collecting device for wax removal balls in oil pipelines according to claim 1, characterized in that: The second pressure reducing ball guiding assembly (8) comprises a shell (82) with flange openings at two ends, one end of the shell (82) is connected to the ball outlet of the first pressure reducing ball guiding assembly (6) through a second guide pipe (7); A blocking body (83) is rotatably connected in the shell (82), a second motor (81) is arranged on the shell (82) to drive the blocking body (83) to rotate in the shell (82), a receiving cavity (84) is arranged on a first opposite end of the blocking body (83), the receiving cavity (84) transfers the wax removing ball from one flange opening to the other flange opening, a blocking part (85) is arranged on a second opposite end of the blocking body (83), the blocking part (85) can block the two flange openings, and the first opposite end and the second opposite end are in a "cross" shape in a left view projection.

5. The intelligent automatic ball collecting device for wax removal balls in oil pipelines according to claim 1, characterized in that: The third pressure reducing ball guiding assembly (10) comprises an electric control valve, one end of the electric control valve is connected to the shell (82) through a temporary storage pipe (9), and the other end of the electric control valve is connected to a third guide pipe (11).

6. The intelligent automatic ball collecting device for wax removal balls in oil pipelines according to claim 1, characterized in that: The recycling system comprises a liquid collecting box (19) and a ball collecting box (14), the third guide pipe (11) is connected to the liquid collecting box (19), and a fourth guide pipe (13) and a first oil return pipe (17) are connected between the liquid collecting box (19) and the ball collecting box (14). A punching pipe (18) is connected between the fourth guide pipe (13) and the third guide pipe (11) in the collecting tank (19), so that the wax balls and the oil liquid in the third guide pipe (11) are separated when passing through the punching pipe (18); The collecting tank (19) is connected with the outflow section of the crude oil conveying pipeline (1) through a second oil return pipe (22), and a hand valve (23) and a one-way valve (25) are arranged on the second oil return pipe (22).

7. The intelligent automatic ball collecting device for wax removal balls in oil pipelines according to claim 1, characterized in that: The device further comprises a control system, which comprises a PLC automatic control box (24), a height detection sensor, an electric control valve (12), a first booster pump (16), a second liquid level detection element (20), a first liquid level detection element (15) and a second booster pump (21), and the electric control valve, a first motor (62) and a second motor (81) are electrically connected with the height detection sensor, the electric control valve (12), the first booster pump (16), the second liquid level detection element (20), the first liquid level detection element (15) and the second booster pump (21). The height detection sensor is fixed to the top of the inner cavity of the temporary storage pipe (9); the electric control valve (12) is installed on the fourth guide pipe (13); the first booster pump (16) is arranged on the first oil return pipe (17); the second liquid level detection element (20) and the first liquid level detection element (15) are arranged in the collecting tank (19) and the ball collecting box (14) respectively; and the second booster pump (21) is arranged on the second oil return pipe (22).

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