Hydrogenation scale inhibitor anti-high temperature cavitation injection structure

Abstract

The present invention relates to the technical field of scale inhibitor injection, and in particular to a hydrogenation scale inhibitor anti-high temperature cavitation injection structure. It includes a storage shell, an oil slurry pipe is installed with a fixed cover, a chamber is arranged in the fixed cover, an injection shell is fixedly connected to the storage shell, an electric control telescopic rod is fixedly connected to the storage shell, an injection plate is fixedly connected to the telescopic end of the electric control telescopic rod, and the injection plate is fixedly connected to a one-way plate through a connecting rod, a bleed valve is fixedly connected to the fixed cover, a heat conducting rod is slidably connected in the fixed cover, and the fixed cover is fixedly connected to an injection pipeline. The present invention heats the scale inhibitor liquid by the heat conducting rod, and then injects the heated scale inhibitor liquid into the oil slurry pipe through the injection pipeline, so that the scale inhibitor liquid has a certain pressure and the temperature is close to that of the crude oil, reducing the generation and rupture of bubbles during the injection of the scale inhibitor liquid, thereby reducing the generation of cavitation, and further reducing the risk of oil slurry pipe rupture.

Description

Technical Field

[0001] The invention relates to the technical field of scale inhibitor injection, in particular to a hydrogenation scale inhibitor high-temperature cavitation prevention injection structure. Background Art

[0002] Hydrogenation scale inhibitor is a multifunctional composite additive. Hydrogenation scale inhibitor is mainly used to remove coking and scaling of hydrogen cracked crude oil. The existing injection structure is to directly connect the injection pipe to the oil slurry pipe by socket welding, and then inject the scale inhibitor liquid into the oil slurry pipe. However, since the crude oil needs to be heated to reduce the viscosity of the crude oil during pipeline transportation, the crude oil temperature in the oil slurry pipe is extremely high and the flow rate of the crude oil is relatively fast. When the scale inhibitor liquid is injected into the high-temperature, high-pressure and high-flow crude oil at a low temperature, a large number of bubbles will be formed in the injection area, and then the bubbles will be crushed by the high pressure. The broken bubbles continuously impact the pipe wall, thereby causing cavitation. If the scale inhibitor liquid is injected into the oil slurry pipe after preheating, the scale inhibitor liquid will volatilize due to heat, so that a large amount of gas will be generated in the scale inhibitor liquid. In order to ensure the pressure of the scale inhibitor liquid, the gas in the scale inhibitor liquid cannot be discharged in time. When the scale inhibitor liquid carries gas and is injected into the oil slurry pipe, it will also enhance the cavitation of the oil slurry pipe, thereby affecting the strength of the oil slurry pipe. Summary of the invention

[0003] In order to overcome the disadvantage that cavitation occurs when a scale inhibitor liquid is injected into a high-temperature, high-pressure and high-flow crude oil at a low temperature, the present invention provides a high-temperature cavitation prevention injection structure for a hydrogenation scale inhibitor.

[0004] The technical solution of the present invention is: a hydrogenation scale inhibitor anti-high temperature cavitation injection structure, comprising a storage shell, the storage shell is detachably connected to the oil slurry pipe, a fixed cover is sealed and installed on the oil slurry pipe, a chamber is arranged in the fixed cover, an injection shell connected to the chamber through a conduit is fixedly connected to the storage shell, an electric control valve is installed on the conduit between the chamber and the injection shell, the injection shell is connected to the storage shell through a conduit with a one-way valve, an electric control telescopic rod is fixedly connected to the storage shell, the telescopic end of the electric control telescopic rod passes through the injection shell and is fixedly connected to the injection plate, the injection shell and the chamber are connected to each other, and the injection shell is connected to the chamber through a conduit. The injection plate is slidably connected, and a one-way plate is fixedly connected to the lower side of the injection plate through a connecting rod. The one-way plate is located in the chamber and is slidably connected to the fixed cover. An air relief valve connected to the chamber is fixedly connected to the fixed cover. The one-way plate is slidably connected to a sliding frame that is squeezed and matched with the air relief valve. An elastic member is fixedly connected between the one-way plate and the sliding frame. A heat-conducting rod that is matched with the chamber blockage is slidably connected in the fixed cover. The fixed cover passes through the oil slurry pipe and is fixedly connected to an injection pipe connected to the chamber. The heat-conducting rod and the injection pipe are both located in the oil slurry pipe, and the injection pipe is connected to the oil slurry pipe.

[0005] Furthermore, the agent storage shell is located on the upper side of the fixed cover, and the agent storage shell is press-fitted with the fixed cover.

[0006] Furthermore, the heat-conducting rod is located in the injection pipe, the heat-conducting rod is made of copper and its surface is coated with an epoxy resin layer, and the surface of the injection pipe is also coated with an epoxy resin layer.

[0007] Furthermore, the heat conducting rod and the injection pipe located in the oil slurry pipe are both rhombus-shaped, and the long diagonal line of the rhombus is parallel to the flow direction of the oil slurry pipe.

[0008] Furthermore, a float is fixedly connected to the upper side of the heat-conducting rod, the float is located in the chamber, and a sealing ring that seals with the chamber is fixedly connected to the heat-conducting rod.

[0009] Furthermore, it also includes a rotating impeller, which is rotatably connected to the lower side of the heat-conducting rod, a baffle is fixedly connected to the lower side of the injection pipe, the rotating impeller is fixedly connected to a rotating shaft that passes through the heat-conducting rod, and a side of the rotating shaft away from the rotating impeller is fixedly connected to circumferentially evenly distributed stirring blades, the stirring blades are located in the chamber, a torsion spring is fixedly connected between the stirring blades and the rotating shaft, and the stirring blades are extrusion-fitted with the one-way plate.

[0010] Furthermore, it also includes two groups of symmetrically distributed support pipes, which are fixed to the lower side of the fixed cover, and the support pipes pass through the oil slurry pipe and are connected to the interior thereof. Two pressure relief channels are arranged in the fixed cover, and the support pipes are connected to adjacent pressure relief channels.

[0011] Furthermore, a blocking block is slidably connected in the pressure relief channel, a flexible block is fixedly connected to one side of the blocking block close to the source of the oil slurry flow, the fixed cover is fixedly connected to symmetrically distributed oil discharge pipes, the pressure relief channel is connected and cooperated with the adjacent oil discharge pipes through semicircular holes, and the blocking block and the adjacent flexible block are jointly sealed and cooperated with the semicircular holes of the adjacent pressure relief channel.

[0012] Furthermore, a symmetrically distributed first hydraulic telescopic rod and a symmetrically distributed second hydraulic telescopic rod are fixedly connected to one side of the injection housing close to the fixed cover, the first hydraulic telescopic rod is connected to the adjacent second hydraulic telescopic rod through a conduit, the telescopic end of the first hydraulic telescopic rod is fixedly connected to the one-way plate, the fixed part of the first hydraulic telescopic rod passes through the fixed cover and seals with it, the telescopic end of the second hydraulic telescopic rod is fixedly connected to the adjacent blocking block through a connecting rod, the connecting rod of the telescopic end of the second hydraulic telescopic rod passes through the semicircular holes of the adjacent oil drain pipe and the pressure relief channel, the second hydraulic telescopic rod and the oil drain pipe are sealed and slidably matched, and the blocking block and the oil drain pipe are sealed and slidably matched.

[0013] Furthermore, the amount of hydraulic oil in the first hydraulic telescopic rod and the adjacent second hydraulic telescopic rod is the same, and the extension amount of the telescopic end of the second hydraulic telescopic rod is less than the sum of the vertical height of the blocking block and the vertical height of the semicircular hole of the pressure relief channel.

[0014] The present invention has the following advantages: 1. The present invention heats the scale inhibitor liquid by a heat-conducting rod, and then injects the heated scale inhibitor liquid into the oil slurry pipe through an injection pipe, so that the scale inhibitor liquid has a certain pressure and the temperature is close to that of the crude oil, thereby reducing the generation and rupture of bubbles during the injection of the scale inhibitor liquid, thereby reducing the generation of cavitation, and further reducing the risk of oil slurry pipe rupture;

[0015] 2. The present invention discharges the gas inside the antiscalant liquid through the bleed valve, and then injects the antiscalant liquid into the crude oil through the one-way plate, thereby reducing the amount of gas in the antiscalant liquid and ensuring the pressure of the antiscalant liquid during injection, thereby reducing the amount of bubbles generated in the injection area, thereby reducing the generation of cavitation.

[0016] 3. The present invention stirs the scale inhibitor liquid in a closed space by rotating the stirring blades, so that the gas in the scale inhibitor liquid is discharged. At the same time, the scale inhibitor liquid is given an initial velocity by rotation, so that the flow rate of the scale inhibitor liquid is close to that of the crude oil when it is added to the oil slurry pipe, thereby avoiding the generation of new bubbles due to the flow rate difference of the liquid;

[0017] 4. The present invention diverts crude oil through the pressure relief channel and the support pipeline, reduces the pressure in the antiscalant liquid injection area, and thus reduces the generation of bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a three-dimensional structural cross-sectional view of the fixed cover of the present invention;

[0020] Figure 3It is a three-dimensional structural cross-sectional view of the injection pipeline of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the sliding frame of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing ring of the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating blade fan of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the heat conducting rod and the floating ball of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the stirring fan blade of the present invention;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the baffle of the present invention;

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the supporting pipeline of the present invention;

[0028] Fig.11 It is a schematic diagram of the three-dimensional structure of the pressure relief channel of the present invention;

[0029] Fig.12 It is a schematic diagram of the three-dimensional structure of the first hydraulic telescopic rod and the second hydraulic telescopic rod of the present invention;

[0030] Fig.13 It is a schematic diagram of the three-dimensional structure of the blocking block and the flexible block of the present invention.

[0031] Among them, the following figure marks are included in the following specification drawings: 1: storage shell, 2: fixed cover, 3: chamber, 4: injection shell, 5: electric control telescopic rod, 6: injection plate, 7: one-way plate, 8: air relief valve, 9: sliding frame, 10: heat conduction rod, 11: injection pipeline, 12: float, 13: sealing ring, 14: rotating blade fan, 141: baffle, 15: rotating shaft, 16: stirring blade, 17: supporting pipeline, 18: pressure relief channel, 19: blocking block, 20: flexible block, 201: oil discharge pipeline, 21: first hydraulic telescopic rod, 22: second hydraulic telescopic rod. DETAILED DESCRIPTION

[0032] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] When the existing antiscalant liquid is injected into crude oil, there is a large difference in temperature and pressure between the antiscalant liquid and the crude oil. The high-temperature and high-pressure crude oil in the injection area impacts the antiscalant liquid, which will cause a large number of broken bubbles to be generated in the injection area of ​​the antiscalant liquid. When the bubbles are broken, they continuously impact the pipe wall, thereby causing cavitation, which in turn affects the strength of the oil slurry pipe.

[0034] Example 1: Hydrogenation scale inhibitor anti-high temperature cavitation injection structure, such as Figure 1-Figure 5As shown, it includes a storage shell 1, which is detachably connected to the oil slurry pipe through a pipe clamp, and a fixed cover 2 is sealed and installed on the oil slurry pipe. The storage shell 1 is located on the upper side of the fixed cover 2, and the storage shell 1 and the fixed cover 2 are squeezed together. The storage shell 1 relies on its own gravity to give the fixed cover 2 a downward force, which is used to thicken the injection area of ​​the scale inhibitor liquid in the oil slurry pipe to prevent cavitation in the oil slurry pipe from causing oil leakage on the upper side of the oil slurry pipe. A chamber 3 is arranged in the fixed cover 2, and the chamber 3 is composed of an upper cylindrical cavity, a middle variable diameter channel and a lower cylindrical channel. A control panel not shown in the figure is arranged on the outside of the device, and a temperature sensor electrically connected to the control panel is installed in the chamber 3. An injection shell connected to the chamber 3 through a conduit is fixedly connected to the storage shell 1. The conduit between the chamber 3 and the injection shell 4 is equipped with an electric control valve electrically connected to the control panel. The lower side of the injection shell 4 is connected to the storage shell 1 through a conduit with a one-way valve. When the liquid flows from the storage shell 1 to the injection shell 4, the one-way valve opens. The storage shell 1 is fixedly connected with an electric control telescopic rod 5 electrically connected to the control panel. The telescopic end of the electric control telescopic rod 5 passes through the injection shell 4 and is fixedly connected with an injection plate 6. The injection shell 4 is slidably connected with the injection plate 6. The telescopic end of the electric control telescopic rod 5 passes through the injection shell 4 and there is a gap between the two. The lower side of the injection plate 6 is fixedly connected with a one-way plate 7 through a connecting rod. The one-way plate 7 is provided with holes. The one-way plate 7 is located in the chamber 3 and is slidably connected with the fixed cover 2. The fixed cover 2 is fixedly connected with a vent connected to the chamber 3. Valve 8, the one-way plate 7 is slidably connected with a sliding frame 9 that is pressed and matched with the relief valve 8, and an elastic member is fixedly connected between the one-way plate 7 and the sliding frame 9, wherein the elastic member is a tension spring. When the relief valve 8 squeezes the sliding frame 9, the sliding frame 9 moves downward and drives its elastic member to stretch, so that the sliding frame 9 loses the blockage of the hole on the one-way plate 7. A heat-conducting rod 10 that is slidably connected with the variable diameter hole of the chamber 3 is slidably connected in the fixed cover 2. The part of the heat-conducting rod 10 located in the chamber 3 is cylindrical and its diameter is the same as the smallest diameter of the variable diameter hole of the chamber 3. The fixed cover 2 passes through the oil slurry pipe and is fixedly connected with an injection pipe 11 that is connected to the chamber 3 through a plurality of drainage ports. The drainage port of the injection pipe 11 is located on the left part of its rear side. The heat-conducting rod 10 is located in the injection pipe 11. The heat-conducting rod 1 0 is made of copper and coated with an epoxy resin layer on the surface, which is used to prevent crude oil from corroding the heat-conducting rod 10 through the epoxy resin layer while the heat-conducting rod 10 is conducting heat. The surface of the injection pipe 11 is also coated with an epoxy resin layer. The parts of the heat-conducting rod 10 and the injection pipe 11 located in the oil slurry pipe are both rhombus-shaped, and the long diagonal of the rhombus is parallel to the flow direction of the oil slurry pipe, which is used to reduce the resistance of the pipeline to the flow of crude oil in the oil slurry pipe. The heat-conducting rod 10 and the injection pipe 11 are both located in the oil slurry pipe, and the injection pipe 11 is connected to the oil slurry pipe. Two symmetrically distributed floats 12 are fixedly connected to the upper side of the heat-conducting rod 10, and the float 12 is located in the chamber 3. A sealing ring 13 that seals with the chamber 3 is fixedly connected to the heat-conducting rod 10, and the sealing ring 13 is in the shape of a hollow cone.The upper part of the variable diameter hole of the chamber 3 is in a truncated cone shape, and the floating ball 12 gives an upward force to the heat-conducting rod 10 through buoyancy, so as to keep the sealing ring 13 with an upward force and tightly seal with the variable diameter hole of the chamber 3.

[0035] The initial state of the device is that the storage shell 1 is fixed on the oil slurry pipe by a pipe clamp, and the fixed cover 2 is connected to the oil slurry pipe by socket welding. The storage shell 1 squeezes the fixed cover 2 so that the fixed cover 2 is tightly attached to the oil slurry pipe, which is used to increase the pipe wall thickness of the scale inhibitor liquid injection area of ​​the oil slurry pipe. The flow direction of the crude oil is from right to left, and the storage shell 1 and the chamber 3 are both filled with scale inhibitor liquid. There is no scale inhibitor liquid in the injection shell 4 temporarily. The float 12 gives an upward force to the heat-conducting rod 10 through buoyancy in the scale inhibitor liquid, so that the heat-conducting rod 10 gives an upward force to the sealing ring 13, and the sealing ring 13 blocks the variable diameter channel of the chamber 3. The air relief valve 8 squeezes the sliding frame 9 and stretches its elastic member to store force, and the one-way plate 7 fits with the upper surface of the chamber 3.

[0036] When scale inhibitor needs to be added to the oil slurry pipe, the high-temperature crude oil contacts the heat-conducting rod 10 during the flow and conducts heat. The heat-conducting rod 10 conducts the high temperature to the chamber 3, so that the temperature of the scale inhibitor liquid in the chamber 3 gradually increases. In the process of gradually increasing the temperature of the scale inhibitor liquid, the gas in the scale inhibitor liquid volatilizes and is discharged through the air relief valve 8. When the temperature of the scale inhibitor liquid rises to a temperature close to that of the high-temperature crude oil, the temperature sensor sends out an instruction and controls the telescopic end of the electric telescopic rod 5 to move downward through the control panel. The telescopic end of the electric telescopic rod 5 drives the injection plate 6 to move downward. The injection plate 6 drives the one-way plate 7 to move downward through the connecting rod. The one-way plate 7 drives the sliding frame 9 to move downward. The air relief valve 8 gradually loses contact with the sliding frame 9, and the elastic part of the sliding frame 9 rebounds and resets to block the holes on the one-way plate 7. The one-way plate 7 moves downward to squeeze the liquid in the chamber 3.

[0037] When the one-way plate 7 moves downward to squeeze the scale inhibitor liquid in the chamber 3, the scale inhibitor liquid moves downward to squeeze the heat-conducting rod 10 and the parts thereon, and the scale inhibitor liquid flushes the sealing ring 13. The scale inhibitor liquid passes through the reducing channel of the chamber 3, and then the heated scale inhibitor liquid enters the oil slurry pipe through the injection pipe 11, so that the scale inhibitor liquid has a certain pressure when entering the oil slurry pipe, reducing the amount of bubbles generated when the scale inhibitor liquid is injected into the high-flow crude oil. At the same time, by raising the temperature of the scale inhibitor liquid to a level similar to that of the crude oil, the bursting of bubbles inside the low-temperature and low-pressure liquid after it suddenly enters the high-pressure environment is avoided, and the continuous impact of bubble bursting in the liquid injection area is reduced, thereby reducing the occurrence of cavitation and further reducing the risk of oil slurry pipe rupture.

[0038] When the one-way plate 7 moves to contact with the heat-conducting rod 10, the one-way plate 7 squeezes the heat-conducting rod 10 and moves downward, and the heat-conducting rod 10 drives the parts on it to move downward. During the downward movement of the one-way plate 7, the injection plate 6 moves downward. During the downward movement, the injection plate 6 draws external air into the injection shell 4 through the gap between the telescopic end of the electrically-controlled telescopic rod 5 and the injection shell 4. The injection plate 6 squeezes the gas on its lower side into the chamber 3. At this time, the electrically-controlled valve of the conduit between the chamber 3 and the injection shell 4 is opened.

[0039] When the heat-conducting rod 10 moves to contact the bottom of the chamber 3, the telescopic end of the electric-controlled telescopic rod 5 extends to the limit, and the control panel controls the telescopic end of the electric-controlled telescopic rod 5 to move upward to drive the injection plate 6 to reset. At this time, the electric-controlled valve of the conduit between the chamber 3 and the injection shell 4 is closed, and the injection plate 6 extracts the scale inhibitor liquid in the storage shell 1 into the injection shell 4 through the conduit (at this time, the one-way valve of the conduit between the storage shell 1 and the injection shell 4 is opened for circulation). As the one-way plate 7 moves upward, the sealing ring 13 is squeezed upward by the crude oil pressure on the lower side and drives the heat-conducting rod 10 to reset. When the sealing ring 13 is reset to block the variable diameter channel of the chamber 3, the telescopic end of the electric-controlled telescopic rod 5 is retracted halfway, and the control panel is closed. An instruction is issued to control the opening of the electric control valve of the conduit between the chamber 3 and the injection shell 4, and the scale inhibitor liquid in the injection shell 4 flows into the chamber 3 through the conduit (because the heat conducting rod 10 blocks the variable diameter channel of the chamber 3 during the upward movement and reset of the one-way plate 7, so that the chamber 3 is in a negative pressure state, the sliding frame 9 moves downward under pressure and drives its elastic part to stretch, so that the scale inhibitor liquid in the injection shell 4 quickly flows into the chamber 3, and the pressure in the chamber 3 returns to normal with the injection of liquid), and then with the one-way plate 7 moving to fit the upper side of the chamber 3, the device is in the reset state again, and this cycle is repeated to add scale inhibitor to the oil slurry pipe at a regular and quantitative manner to avoid blockage of the oil slurry pipe.

[0040] When the device is not in use, the operator controls the electric telescopic rod 5 to reset and close it through the control panel, and cleans and repairs the device.

[0041] When the scale inhibitor liquid is injected into the oil slurry pipe, there is a large flow rate difference and pressure difference between the scale inhibitor liquid and the crude oil, which will cause the high-pressure fluid to impact the low-pressure fluid, resulting in a large number of bubbles appearing in the injection area, causing cavitation, and then affecting the strength of the pipe wall.

[0042] Embodiment 2: Based on embodiment 1, Figure 6-Figure 9 As shown, it also includes a rotating blade fan 14, which is rotatably connected to the lower side of the heat-conducting rod 10. The portion of the heat-conducting rod 10 not located in the oil slurry pipe is a cylindrical rod, and a threaded groove is provided on the cylindrical rod of the heat-conducting rod 10. Figure 7The top view is used as a reference, and the rotation direction of the thread groove from top to bottom is counterclockwise. The lower part of the thread groove is aligned with the discharge port of the injection pipe 11, and is used to rotate and discharge the scale inhibitor liquid. A V-shaped baffle 141 is fixedly connected to the lower side of the injection pipe 11. The baffle 141 is used to partially block the rotating blade 14, so that the crude oil drives the rotating blade 14 to rotate. The rotating blade 14 is fixedly connected to a rotating shaft 15 that passes through the heat-conducting rod 10. Four stirring blades 16 evenly distributed in the circumferential direction are fixedly connected to the upper side of the rotating shaft 15. The stirring blade 16 is located in the chamber 3. The crude oil flow drives the rotating blade The fan 14 rotates, and then drives the four stirring blades 16 to rotate around the center of the circle through the rotating shaft 15, so as to stir the scale inhibitor liquid in the chamber 3, so that the flow rate of the scale inhibitor liquid in the chamber 3 is close to the flow rate of the crude oil in the oil slurry pipe. A torsion spring is fixedly connected between the stirring blade 16 and the rotating shaft 15. When the stirring blade 16 rotates to stir the scale inhibitor liquid, the torsion spring accumulates force so that the larger surface of the stirring blade 16 is approximately perpendicular to the horizontal plane of the liquid. The stirring blade 16 is squeezed with the one-way plate 7, so as to drive the stirring blade 16 to move downward when the one-way plate 7 moves downward.

[0043] During the flow of crude oil in the oil slurry pipe, the crude oil passes through the rear side of the baffle 141 and drives the rotating impeller 14 to rotate. The rotating impeller 14 drives the circumferentially distributed stirring impellers 16 to rotate through the rotating shaft 15, and stirs the scale inhibitor liquid in the chamber 3, so that the bubbles of the scale inhibitor liquid are discharged and broken by stirring in the chamber 3, thereby reducing the cavitation phenomenon in the oil slurry pipe. Then, the gas in the scale inhibitor liquid flows out through the bleed valve 8, thereby reducing the gas content in the scale inhibitor liquid. At the same time, the initial velocity of the scale inhibitor liquid is given by rotation, and the scale inhibitor liquid rotates and flows and rotates downward along the threaded groove of the heat conducting rod 10, and finally enters the crude oil through the discharge port of the injection pipe 11, so that the flow velocity of the scale inhibitor liquid is close to the flow velocity of the crude oil when it is added to the oil slurry pipe, thereby reducing bubbles generated due to the difference in liquid flow velocity.

[0044] During the rotation of the stirring blade 16, the torsion spring of the stirring blade 16 is twisted and stored due to the liquid resistance, so that the larger surface of the stirring blade 16 is approximately perpendicular to the liquid horizontal plane, increasing the contact area between the stirring blade 16 and the scale inhibitor liquid and improving the stirring efficiency.

[0045] After the scale inhibitor liquid is injected into the oil slurry pipe, the oil pressure in the oil slurry pipe will increase, thereby causing the pressure on the oil slurry pipe to increase, thereby affecting the strength of the oil slurry pipe.

[0046] Embodiment 3: Based on embodiment 2, Fig.10 and Fig.11As shown, it also includes two groups of support pipes 17 made of hard materials that are symmetrically distributed front and back. Each group of support pipes 17 is symmetrical on the left and right. The two symmetrically distributed groups of support pipes 17 are fixed to the lower side of the fixed cover 2, and the lower ends of the support pipes 17 are inclined in the direction away from the fixed cover 2, which is used to increase the firmness of the support pipes 17 inserted into the oil slurry pipe, thereby preventing the fixed cover 2 from being pushed upward by the oil pressure. The support pipes 17 pass through the oil slurry pipe and are connected to the inside thereof. Two pressure relief channels 18 that are symmetrical front and back are arranged in the fixed cover 2, and the support pipes 17 are connected to adjacent pressure relief channels 18.

[0047] like Fig.13 As shown, a blocking block 19 is slidably connected in the pressure relief channel 18, and a flexible block 20 is fixedly connected to the right side of the blocking block 19. The flexible block 20 is embedded in the adjacent blocking block 19 and together with it forms a semicircular block. The fixed cover 2 is fixedly connected with an oil discharge pipe 201 symmetrically distributed front and back. The oil discharge pipe 201 is used to discharge part of the crude oil when the oil pressure increases. The pressure relief channel 18 is connected and coordinated with the adjacent oil discharge pipe 201 through a semicircular hole. The shape of the semicircular hole of the pressure relief channel 18 is the same as the shape of the semicircular block formed by the adjacent flexible block 20 and the adjacent blocking block 19. The blocking block 19 and the adjacent flexible block 20 are jointly sealed and coordinated with the semicircular hole of the adjacent pressure relief channel 18. When the flexible block 20 is compressed, the crude oil flows through the flexible block 20 to the semicircular hole of the adjacent pressure relief channel 18.

[0048] like Figure 10-13 As shown, the lower side of the injection housing 4 is fixedly connected with a first hydraulic telescopic rod 21 and a second hydraulic telescopic rod 22 that are symmetrically distributed front and back. The first hydraulic telescopic rod 21 is connected to the adjacent second hydraulic telescopic rod 22 through a conduit. The telescopic end of the first hydraulic telescopic rod 21 is fixedly connected to the one-way plate 7, so that when the one-way plate 7 moves, the telescopic end of the first hydraulic telescopic rod 21 can be synchronously telescoped. The fixed portion of the first hydraulic telescopic rod 21 passes through the fixed cover 2 and is sealed with it to prevent the scale inhibitor liquid in the chamber 3 from leaking. The telescopic end of the second hydraulic telescopic rod 22 is fixedly connected to the adjacent blocking block 19 through a connecting rod, so as to drive the blocking block 1 9 moves up and down, the connecting rod of the telescopic end of the second hydraulic telescopic rod 22 passes through the semicircular holes of the adjacent oil discharge pipe 201 and the pressure relief channel 18, the second hydraulic telescopic rod 22 and the oil discharge pipe 201 are sealed and slidably matched, the blocking block 19 is sealed and slidably matched with the oil discharge pipe 201, the amount of hydraulic oil in the first hydraulic telescopic rod 21 and the adjacent second hydraulic telescopic rod 22 is the same, and the extension of the telescopic end of the second hydraulic telescopic rod 22 is less than the sum of the vertical height of the blocking block 19 and the vertical height of the semicircular hole of the pressure relief channel 18, which is used to make the blocking block 19 move upward to block the semicircular hole of the pressure relief channel 18, while allowing other parts of the pressure relief channel 18 to flow.

[0049] During the flow of crude oil, if the pressure in the oil slurry pipe is too high, part of the crude oil enters the two support pipes 17 on the right, and then the crude oil enters the adjacent pressure relief channel 18 through the support pipe 17. The crude oil squeezes the flexible block 20. If the crude oil pressure is relatively high at this time, the flexible block 20 is compressed to the left, so that the crude oil flows into the semicircular hole of the pressure relief channel 18, and then the crude oil is discharged through the oil discharge pipe 201 and collected by the operator, so as to avoid damage to the oil slurry pipe due to excessive pressure in the oil slurry pipe.

[0050] During the downward movement of the one-way plate 7, the one-way plate 7 drives the telescopic ends of the two first hydraulic telescopic rods 21 to move downward, and the telescopic end of the first hydraulic telescopic rod 21 extracts the hydraulic oil in the adjacent second hydraulic telescopic rod 22 through the conduit. Taking the second hydraulic telescopic rod 22 on the front side as an example, the telescopic end of the second hydraulic telescopic rod 22 on the front side moves upward, and the telescopic end of the second hydraulic telescopic rod 22 on the front side drives the adjacent blocking block 19 and the adjacent flexible block 20 to move upward. When the telescopic end of the second hydraulic telescopic rod 22 shrinks to the limit position, the blocking block 19 and the adjacent flexible block 20 move upward to the semicircular holes of the adjacent oil discharge pipe 201 and the adjacent pressure relief channel 18, so that the adjacent oil discharge pipe 201 and the semicircular holes of the adjacent pressure relief channel 18 are blocked, and the crude oil flows to the left through the pressure relief channel 18 to the adjacent support pipe 17 on the left. During the injection of the scale inhibitor liquid, the crude oil is diverted to reduce the liquid pressure in the injection area, thereby reducing the generation of bubbles.

[0051] When the device is stopped from being used, the operator controls the electric telescopic rod 5 to reset and close it through the control panel, so that the injection plate 6, the one-way plate 7 and the heat-conducting rod 10 are reset, and the one-way plate 7 and the heat-conducting rod 10 both drive the parts thereon to reset, and then the operator cleans and repairs the device.

[0052] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A hydrogenation scale inhibitor anti-high temperature cavitation injection structure, comprising a storage shell (1), the storage shell (1) being detachably connected to an oil slurry pipe, a fixed cover (2) being sealed and installed on the oil slurry pipe, a chamber (3) being arranged in the fixed cover (2), an injection shell (4) being fixedly connected to the storage shell (1) and communicating with the chamber (3) through a conduit, an electric control valve being installed in the conduit between the chamber (3) and the injection shell (4), the injection shell (4) being communicated with the storage shell (1) through a conduit with a one-way valve, and characterized in that: The invention also comprises an electrically controlled telescopic rod (5), the electrically controlled telescopic rod (5) being fixedly connected to the agent storage housing (1), the telescopic end of the electrically controlled telescopic rod (5) passing through the agent injection housing (4) and being fixedly connected to an agent injection plate (6), the agent injection housing (4) being slidably connected to the agent injection plate (6), the lower side of the agent injection plate (6) being fixedly connected to a one-way plate (7) via a connecting rod, the one-way plate (7) being located in the chamber (3) and being slidably connected to the fixed cover (2), the fixed cover (2) being fixedly connected to an air release valve communicating with the chamber (3) (8), the one-way plate (7) is slidably connected to a sliding frame (9) that is pressed and matched with the air relief valve (8), an elastic member is fixedly connected between the one-way plate (7) and the sliding frame (9), a heat-conducting rod (10) that is slidably connected to the fixed cover (2) and is matched with the chamber (3) for blocking, the fixed cover (2) passes through the oil slurry pipe and is fixedly connected to an injection pipe (11) that is connected to the chamber (3), the heat-conducting rod (10) and the injection pipe (11) are both located in the oil slurry pipe, and the injection pipe (11) is connected to the oil slurry pipe; The agent storage housing (1) is located on the upper side of the fixed cover (2), and the agent storage housing (1) and the fixed cover (2) are press-fitted; The heat-conducting rod (10) is located in the injection pipe (11); the heat-conducting rod (10) is made of copper and has a surface coated with an epoxy resin layer; the surface of the injection pipe (11) is also coated with an epoxy resin layer; The heat conducting rod (10) and the injection pipe (11) located in the oil slurry pipe are both rhombus-shaped, and the long diagonal line of the rhombus is parallel to the flow direction of the oil slurry pipe; A floating ball (12) is fixedly connected to the upper side of the heat-conducting rod (10), the floating ball (12) is located in the chamber (3), and a sealing ring (13) is fixedly connected to the heat-conducting rod (10) and is in sealing cooperation with the chamber (3); The invention also comprises a rotating impeller (14), wherein the rotating impeller (14) is rotatably connected to the lower side of the heat-conducting rod (10), a baffle (141) is fixedly connected to the lower side of the injection pipe (11), the rotating impeller (14) is fixedly connected to a rotating shaft (15) penetrating the heat-conducting rod (10), a side of the rotating shaft (15) away from the rotating impeller (14) is fixedly connected to stirring blades (16) evenly distributed in the circumferential direction, the stirring blades (16) are located in the chamber (3), a torsion spring is fixedly connected between the stirring blades (16) and the rotating shaft (15), and the stirring blades (16) are pressed and fitted with the one-way plate (7).

2. The hydrogenation scale inhibitor anti-high temperature cavitation injection structure according to claim 1 is characterized in that: It also includes two groups of symmetrically distributed support pipes (17), which are both fixedly connected to the lower side of the fixed cover (2), and the support pipes (17) penetrate the oil slurry pipe and communicate with the interior thereof. Two pressure relief channels (18) are arranged in the fixed cover (2), and the support pipes (17) are communicated with adjacent pressure relief channels (18).

3. The hydrogenation scale inhibitor anti-high temperature cavitation injection structure according to claim 2 is characterized in that: A blocking block (19) is slidably connected in the pressure relief channel (18); a flexible block (20) is fixedly connected to a side of the blocking block (19) close to the source of the oil slurry flow; the fixed cover (2) is fixedly connected to symmetrically distributed oil discharge pipes (201); the pressure relief channel (18) is connected and cooperated with the adjacent oil discharge pipes (201) through semicircular holes; the blocking block (19) and the adjacent flexible block (20) are jointly sealed and cooperated with the semicircular holes of the adjacent pressure relief channel (18).

4. The hydrogenation scale inhibitor anti-high temperature cavitation injection structure according to claim 3 is characterized in that: A symmetrically distributed first hydraulic telescopic rod (21) and a symmetrically distributed second hydraulic telescopic rod (22) are fixedly connected to one side of the injection housing (4) close to the fixed cover (2); the first hydraulic telescopic rod (21) is connected to the adjacent second hydraulic telescopic rod (22) through a conduit; the telescopic end of the first hydraulic telescopic rod (21) is fixedly connected to the one-way plate (7); the fixed portion of the first hydraulic telescopic rod (21) passes through the fixed cover (2) and is in sealing cooperation with the same; the telescopic end of the second hydraulic telescopic rod (22) is fixedly connected to the adjacent blocking block (19) through a connecting rod; the connecting rod of the telescopic end of the second hydraulic telescopic rod (22) passes through the semicircular holes of the adjacent oil discharge pipe (201) and the pressure relief channel (18); the second hydraulic telescopic rod (22) and the oil discharge pipe (201) are in sealing and sliding cooperation; and the blocking block (19) and the oil discharge pipe (201) are in sealing and sliding cooperation.

5. The hydrogenation scale inhibitor anti-high temperature cavitation injection structure according to claim 4 is characterized in that: The amount of hydraulic oil in the first hydraulic telescopic rod (21) and the adjacent second hydraulic telescopic rod (22) is the same, and the extension amount of the telescopic end of the second hydraulic telescopic rod (22) is less than the sum of the vertical height of the blocking block (19) and the vertical height of the semicircular hole of the pressure relief channel (18).

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