Filtering device for petrochemical industry

Abstract

The invention relates to the technical field of filtering equipment, in particular to a filtering device for petrochemical engineering. Comprising an oil conveying pipe, a branch pipe, a filter pipe, a pressurizing cylinder and a stop valve, conical convergent openings are formed in the ends, connected with the filter pipe, of the pressurizing cylinder and the branch pipe, the conical faces of the conical convergent openings are arranged away from the filter pipe, hollow pipes are inserted into the conical convergent openings, and conical plugs matched with the conical convergent openings are arranged at the ends, away from the filter pipe, of the hollow pipes; a spring is arranged between the conical plug and the conical closing opening, and a plurality of oil passing openings communicated with the interior of the hollow pipe are formed in the conical surface of the conical plug in an annular array mode; one end, facing the filter pipe, of the hollow pipe in the pressurizing cylinder abuts against the inlet of the filter element; a push cylinder abutting against the hollow pipe in the branch pipe is arranged in the first threaded connector. The non-stop replacement of the filter element is realized, and in the replacement process, the switching of the branch pipe and the pressurizing cylinder from opening to closing is realized, so that the problem of oil seepage / gushing during the direct disassembly of the filter pipe is avoided, and the oil overflow is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of filtering equipment, in particular to a filtering device for petrochemical industry. Background Art

[0002] The petrochemical industry, referred to as petrochemicals, generally refers to the processing industry that uses oil and natural gas as raw materials to produce petroleum products and petrochemical products. It is an important part of the chemical industry. Most oil well products contain impurities such as water and sand, and some mineral salts are dissolved in the water. During transportation, the silt entrained in the crude oil will block the pipeline and storage tank, causing equipment wear and even scaling and corrosion in the equipment. Therefore, crude oil must be purified and processed to become a qualified product that meets the requirements for external transportation.

[0003] Crude oil is purified mainly through filtration. The most common filtration method is the screen-type oil filtration method: a filter element is used to filter out smaller solid shells in the oil to achieve the purpose of oil purification. However, it should be known that after a long period of operation, the filter element in the filter element reaches saturation. At this time, the filter element not only cannot play a purification role, but will cause the oil pressure to increase, causing harm to the system. Therefore, the filter element must be replaced before the filter element reaches saturation, which requires shutdown operation, affecting the overall purification efficiency of the oil.

[0004] In addition, the traditional screen-type oil filtration method is single-stage filtration. If there is only one set of filtering equipment, the purification level of the filter element is maximized, and solid impurities are required to be filtered out as much as possible, thereby accelerating the saturation process of the filter element and shortening the single use time of the filter element. If there are multiple sets of filtering equipment, they are arranged in order of filtration accuracy, so the filter element of the front filtering equipment needs to be stopped for replacement, which affects efficiency.

[0005] To this end, the present invention provides a filtering device for petrochemical industry, which performs multi-stage filtering treatment on oil to improve purification accuracy and reduce impurity content in the oil; at the same time, the structure of the entire multi-stage filtering equipment is improved so that the filter element can be replaced without stopping the machine and does not affect the overall purification process of the oil. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and to propose a filtering device for petrochemical industry.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A filtering device for petrochemical industry, comprising: An oil pipeline, wherein the oil pipeline is provided with an oil inlet and an oil outlet for inputting and outputting oil; Branch pipes, a plurality of which are arranged at intervals on the oil pipeline; The filter tube corresponds to the branch pipe one by one, and the two ends of the filter tube are rotatably installed with a threaded joint 1 and a threaded joint 2 respectively, and the threaded joint 1 is threadedly connected to the port of the branch pipe. A filter element is arranged in the filter tube for filtering the oil, and the filtering accuracy of the multiple filter elements is gradually increased; The pressure cylinder corresponds to the branch pipe one by one. The pressure cylinder penetrates the side wall of the oil pipeline and is connected to the oil pipeline. The port of the pressure cylinder is threadedly connected to the second threaded joint. A pressure booster is provided in the pressure cylinder to increase the power of the oil in the filter tube to pass through the filter element and accelerate the flow of the oil. A stop valve is provided on the oil pipeline between the multiple groups of branch pipes and the pressure cylinder, which is used to cut off the oil pipeline and guide the oil flow in the oil pipeline; The pressurizing cylinder, the branch pipe and the end connected to the filter pipe are all provided with a conical closing inside, the conical surface of the conical closing is arranged away from the filter pipe, a hollow pipe is inserted into the conical closing, and the end of the hollow pipe away from the filter pipe is provided with a conical plug matching with the conical closing, a spring is provided between the conical plug and the conical closing, and a plurality of oil through ports connected with the inside of the hollow pipe are arranged in a circular array on the conical surface of the conical plug; the hollow pipe in the pressurizing cylinder faces one end of the filter pipe and abuts against the filter element inlet; a push cylinder is provided in the threaded joint and abuts against the hollow pipe in the branch pipe.

[0008] Preferably, the filter tube is composed of a hard mounting tube and a hose, threaded joint 1 is rotatably mounted on the hose, threaded joint 2 is rotatably mounted on the mounting tube, a plurality of platforms are arranged in a circular array in the mounting tube, and the filter element is placed on the platforms.

[0009] Preferably, the mounting tube is detachably connected to the hose.

[0010] Preferably, the pressurizing cylinder is detachably mounted with a flange structure, and the flange structure is threadedly connected to a threaded joint facing the pressurizing cylinder.

[0011] Preferably, the pressurizer includes a rotating wheel arranged outside the pressurizing cylinder, which is driven to rotate by a power assembly, and a cam groove is provided on the rotating wheel, an insert is inserted into the cam groove, and a push rod is connected to the insert, which is inserted into the pressurizing cylinder and axially slidingly cooperates with one end of the pressurizing cylinder away from the filter tube, and a leather cup is provided at one end of the push rod extending into the pressurizing cylinder.

[0012] Preferably, an open cylinder is installed at one end of the push rod extending out of the pressurizing cylinder, an insert is axially slidably installed at the port of the open cylinder, a metal ring is installed at one end of the insert extending into the open cylinder, a spring three is provided between the metal ring and the insert, and an electromagnet is provided in the open cylinder on the side of the metal ring away from the rotating wheel.

[0013] Preferably, the oil pipeline is arranged in a loop, the rotating wheel is arranged at the inner axis of the oil pipeline annular structure, and the inserts on the push rods corresponding to the multiple pressurizing cylinders are all inserted into the same cam groove.

[0014] Preferably, the pressurizing cylinder is arranged perpendicular to the oil pipeline, and the branch pipe is arranged along the tangent line of the oil pipeline.

[0015] Preferably, the power assembly includes a worm wheel mounted on the rotating shaft of the rotating wheel, the turbine is meshed with a worm, and the worm is connected to a reduction motor via a chain drive.

[0016] Compared with the prior art, the present invention provides a filtering device for petrochemical industry, which has the following beneficial effects: 1. The present invention realizes the replacement of the filter element without stopping the machine, and does not affect the overall purification process of the oil. In addition, during the replacement process, the position of the cone plug 1 and the cone plug 2 is changed to realize the conversion of the branch pipe and the pressure cylinder from opening to closing, thereby avoiding the problem of oil seepage / gushing when the filter tube is directly removed, reducing oil spillage, avoiding waste, and reducing the difficulty of cleaning the site.

[0017] 2. In the present invention, the filter tube and the pressurizing cylinder are connected by means of components such as cone plug 2 and cone closing end 2, which not only realizes the connection between the filter tube and the pressurizing cylinder, but also controls the closing and opening of cone plug 2 and cone closing end 2 by screwing threaded joint 2, that is, the connection and switch control are integrated into one, which is convenient for disassembly and assembly, and there is no need to set up additional valves to withstand the flushing of pressurized oil.

[0018] 3. The present invention provides multiple filter units on the oil pipeline to achieve multiple filtrations, so that the oil filtration effect is better. Moreover, the filtration accuracy of the filter unit increases step by step, and the oil is filtered in multiple stages to improve the purification accuracy and reduce the impurity content of the oil; at the same time, the pollution capacity of each filter unit is separated, and the time for the filter element to reach the saturation of the pollution capacity is extended, that is, the service life of the filter element is extended.

[0019] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top perspective schematic diagram of the present invention.

[0021] Figure 2 It is a bottom-up stereoscopic schematic diagram of the present invention.

[0022] Figure 3 It is a front view schematic diagram of the present invention.

[0023] Figure 4 It is a side view schematic diagram of the present invention.

[0024] Figure 5 It is a three-dimensional schematic diagram of the power assembly structure of multiple pressurizers of the present invention.

[0025] Figure 6 It is a top view schematic diagram of the present invention.

[0026] Figure 7 It is a schematic diagram of an axial horizontal section of the oil pipeline of the present invention.

[0027] Figure 8 For the present invention Figure 7 Local schematic diagram of point A.

[0028] Fig. 9 For the present invention Figure 7 Schematic diagram of the connection between the filter tube, branch pipe and pressure cylinder.

[0029] Fig.10 For the present invention Fig. 9 Schematic diagram of the separation state.

[0030] Fig.11 It is a right side view, a front cross-sectional view, and a left side view of the installation tube of the present invention.

[0031] Fig.12 It is a schematic diagram of the separation of the second conical plug and the second conical closing end of the present invention; Fig.13 It is a stereoscopic schematic diagram of the filter tube assembly of the present invention.

[0032] Fig.14 It is a stereoscopic diagram and an exploded diagram of the connection between the filter element of the present invention and the hollow tube, the tapered closing end and the tapered plug.

[0033] Fig.15 For the present invention Figure 5 Schematic diagram after removing the rotating wheel.

[0034] Fig.16 It is a cross-sectional view of the push rod assembly of the present invention.

[0035] Fig.17 For the present invention Figure 8 Partial schematic diagram of point B.

[0036] Fig.18 It is the operating principle diagram of the present invention.

[0037] Fig.19 For the present invention Fig.18 Schematic diagram of the filtration system operation.

[0038] Fig. 20 For the present invention Fig.18 The operating principle diagram of the backwash system.

[0039] In the figure: 1, oil pipeline; 2, pressure cylinder; 3, branch pipe; 4, filter pipe; 401, installation cylinder; 402, hose; 5, tapered necking two; 6, hollow pipe two; 7, cone plug two; 8, oil port two; 9, threaded joint two; 10, threaded joint one; 11, tapered necking one; 12, cone plug one; 13, push cylinder; 14, assembly ring one; 15, assembly ring two; 16, push rod; 17, leather cup; 18, insert; 19, runner; 20, cam groove; 21, open cylinder; 22, electromagnet; 23, metal ring; 24, flange one; 25, flange two; 26, flange cover; 27, sealing gasket three; 28, bracket; 29, worm gear; 30, worm; 31, reduction motor; 32, filter element; 33, platform; 34, globe valve. Detailed implementation manner

[0040] The following will combine the accompanying Figure 1-20 drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0041] Embodiment 1. To solve the problem that the replacement of the filter element 32 during shutdown in the prior art affects the purification process, this embodiment provides a filtering device for petrochemical industry, including: An oil pipeline 1, which is provided with an oil inlet and an oil outlet for the input and output of oil liquid; Branch pipes 3, and a plurality of branch pipes 3 are arranged at intervals on the oil pipeline 1; Filter pipes 4, corresponding to the branch pipes 3 one by one. Threaded joints one 10 and threaded joints two 9 are respectively rotatably installed at both ends of the filter pipe 4. The threaded joint one 10 is threadedly connected to the port of the branch pipe 3. A filter element 32 is arranged in the filter pipe 4 for filtering the oil liquid, and the filtering precisions of the plurality of filter elements 32 gradually increase; Pressure cylinders 2, corresponding to the branch pipes 3 one by one. The pressure cylinders 2 penetrate through the side wall of the oil pipeline 1 and communicate with the oil pipeline 1. The port of the pressure cylinder 2 is threadedly connected to the threaded joint two 9; a pressure booster is arranged in the pressure cylinder 2 for increasing the power of the oil liquid in the filter pipe 4 to pass through the filter element 32 and accelerating the flow of the oil liquid; Globe valves 34, and globe valves 34 are arranged on the oil pipeline 1 between multiple groups of branch pipes 3 and pressure cylinders 2 for truncating the oil pipeline 1 and guiding the oil flow direction in the oil pipeline 1; The pressurizing cylinder 2, the branch pipe 3 and the end connected to the filter tube 4 are all provided with a conical closing inside, the conical surface of the conical closing is arranged away from the filter tube 4, a hollow tube is inserted into the conical closing, and the end of the hollow tube away from the filter tube 4 is provided with a conical plug matching the conical closing, a spring is provided between the conical plug and the conical closing, and a plurality of oil through holes connected to the inside of the hollow tube are arranged in a circular array on the conical surface of the conical plug; the end of the hollow tube in the pressurizing cylinder 2 facing the filter tube 4 is against the inlet of the filter element 32; a push cylinder 13 is provided in the threaded joint 10 to abut against the hollow tube in the branch pipe 3.

[0042] Principle details of this embodiment: A filtering device for petrochemical industry comprises: an oil pipeline 1, wherein the two ports of the oil pipeline 1 are an oil inlet and an oil outlet, respectively, for inputting and outputting oil. The oil inlet is externally connected to an oil supply system, and the oil supply system inputs crude oil into the oil pipeline 1 through the oil inlet; the oil outlet is connected to an oil storage tank, which is used to receive and temporarily store filtered oil. A plurality of brackets 28 are arranged at intervals on the oil pipeline 1, which are used to support and erect the oil pipeline 1. The input and delivery of oil are powered by an external pump.

[0043] The oil pipeline 1 is connected to a plurality of branch pipes 3 at intervals, and the branch pipes 3 are connected to the oil pipeline 1 via a flange structure, so that the branch pipes 3 are detachable, which is convenient for subsequent maintenance and replacement.

[0044] Each of the branch pipes 3 has an external thread, on which a threaded connector 10 is threadedly installed, and a filter tube 4 is rotatably installed at one end of the threaded connector 10 away from the branch pipe 3. A filter element 32 is arranged in the filter tube 4, forming a pipeline filter structure. The purification accuracy of the multiple filter elements 32 on an oil pipeline 1 gradually increases from the oil inlet to the oil outlet, that is, the size of the solid impurity particles that can be filtered is getting smaller and smaller.

[0045] The port of each filter tube 4 facing away from the threaded joint 10 is rotatably mounted with a threaded joint 2 9. The threaded joint 2 9 is threadedly connected with a pressurizing cylinder 2, which is located on the oil pipeline 1 at the oil inlet side of the corresponding branch pipe 3 facing the oil pipeline 1. The threaded joint 2 9 is an internal threaded component, and the outer wall of the pressurizing cylinder 2 is provided with an external thread, thereby realizing the threaded connection between the threaded joint 2 9 and the pressurizing cylinder 2.

[0046] The pressure cylinder 2 passes through the oil pipeline 1 and is perpendicular to the axis of the oil pipeline 1. A through hole is provided on the side wall of the pressure cylinder 2 located inside the oil pipeline 1. The through hole is arranged along the axial direction of the oil pipeline 1, so that the pressure cylinder 2 is communicated with the inside of the oil pipeline 1.

[0047] The pressurizing cylinder 2 is provided with a pressurizer, through which the oil flowing into the pressurizing cylinder 2 is pressurized, so as to increase the power for the oil in the filter tube 4 to pass through the filter element 32 and accelerate the flow of the oil.

[0048] The oil pipeline 1 is provided with a stop valve 34 between each branch pipe 3 and the pressure cylinder 2, which is used to cut off the oil pipeline 1 and guide the oil flow in the oil pipeline 1. In the drawings, the structure of the stop valve 34 is only a schematic diagram.

[0049] In this embodiment, since the connection structures between the threaded joint 10 and the branch pipe 3, and between the threaded joint 2 9 and the pressurizing cylinder 2 are similar, for the convenience of review, the branch pipe 3 and the threaded joint 10, the threaded joint 2 9 and each assembly component in the pressurizing cylinder 2 are separately marked to distinguish them: The end of the branch pipe 3 connected to the threaded joint 10 is provided with a tapered closing opening 11 inside, and a hollow tube 1 is inserted into the tapered closing opening 11, and the hollow tube 1 passes through the tapered closing opening 11. A tapered plug 12 is provided at the end of the hollow tube 1 facing away from the threaded joint 10, and a plurality of oil ports 1 are arranged in a circular array on the side of the tapered plug 12, and the plurality of oil ports 1 are communicated with the inner cavity of the hollow tube 1. A hollow assembly ring 14 is fixedly sleeved on the end of the hollow tube facing the threaded joint 10, and the outer diameter of the assembly ring 14 is the same as the inner diameter of the branch pipe 3. The assembly ring 14 is embedded in the branch pipe 3 to limit and guide the movement of the hollow tube 1 and the tapered plug 12 to prevent lateral deviation. A spring is provided at the end of the assembly ring 14 facing the tapered closing opening 11, and through the pulling of the spring 1, the tapered plug 12 always tends to block the tapered closing opening 11. An annular push tube 13 is provided inside the threaded joint 10, and the inner diameter of the push tube 13 is connected to the outer diameter of the hollow tube 1. After the threaded joint 10 is screwed onto the branch pipe 3, the hollow tube 1 is inserted into the push tube 13, and the end of the push tube 13 is pressed against the assembly ring 14, so that the cone plug 12 is separated from the cone-shaped closing 11, and the spring 1 is stretched. At this time, the inner cavity of the filter tube 4, the push tube 13, the hollow tube 1, and the branch pipe 3 are connected in sequence, thereby constructing an oil delivery channel between the filter tube 4 and the branch pipe 3. A sealing gasket 1 is provided between the end of the push tube 13 and the assembly ring 14 to enhance the sealing of the connection. The length of the threaded connection between the threaded joint 10 and the branch pipe 3 is greater than the distance between the push tube 13 and the cone plug 12 out of the cone-shaped closing 11.

[0050] The pressure cylinder 2 is provided with a conical closing opening 25 at one end connected to the threaded joint 29, and a hollow tube 26 is inserted into the conical closing opening 25, and the hollow tube 26 passes through the conical closing opening 25. A conical plug 27 is provided at the end of the hollow tube 26 away from the threaded joint 29, and a plurality of oil through ports 28 are arranged in a circular array on the side of the conical plug 27, and the plurality of oil through ports 28 are communicated with the inner cavity of the hollow tube 26. An assembly ring 215 is fixedly sleeved on the end of the hollow tube 26 facing the threaded joint 29, and the outer diameter of the assembly ring 215 is the same as the inner diameter of the pressure cylinder 2. The assembly ring 215 is embedded in the pressure cylinder 2 to guide the movement of the hollow tube 26 and the conical plug 27 to prevent lateral deviation. A spring 2 is provided at the end of the assembly ring 215 facing the conical closing opening 25, and the conical plug 27 always tends to block the conical closing opening 25 through the pulling of the spring 2. After the threaded joint 29 is screwed onto the pressurizing cylinder 2, the hollow tube 26 is inserted into the inlet of the filter element 32. The inner diameter of the inlet of the filter element 32 is the same as the outer diameter of the hollow tube 26. The inlet end face of the filter element 32 abuts against the assembly ring 215, so that the cone plug 27 is separated from the cone-shaped closing 25, and the spring 2 is stretched. At this time, the filter element 32, the hollow tube 26, the pressurizing cylinder 2, and the oil pipeline 1 are connected in sequence, thereby constructing an oil delivery channel between the filter tube 4 and the pressurizing cylinder 2. A sealing gasket 2 is provided between the assembly ring 215 and the inlet of the filter element 32 to enhance the sealing of the connection. The length of the threaded connection between the threaded joint 29 and the pressurizing cylinder 2 is greater than the distance between the inlet end face of the filter element 32 and the cone plug 27 pushed out of the cone-shaped closing 25.

[0051] In this embodiment, the threads between the threaded connector 10 and the branch pipe 3, and the threads between the threaded connector 2 9 and the pressurizing cylinder 2 comply with the GBT12716-2011 60° sealing pipe thread standard, so that the thread pair itself has a sealing pipe thread. In order to ensure the reliability of the threaded connection seal, a suitable sealing medium should be added to the thread pair, such as wrapping tape or sealant on the thread surface.

[0052] According to the above technical solution: 1. When purifying oil: All stop valves 34 are in a closed state, and the oil pipeline 1 between the branch pipe 3 and the pressure cylinder 2 in the same group is in a closed state. At this time, the flow direction of the oil is: oil inlet, oil pipeline 1, pressure cylinder 2, filter tube 4, branch pipe 3, oil pipeline 1..., after multiple levels of filtration, until it is discharged from the oil outlet to the oil pipeline 1.

[0053] After the oil enters the pressure cylinder 2, the oil is pressurized by the pressure booster, thereby increasing the speed of the oil passing through the filter element 32 and improving the filtering efficiency. At the same time, the pressurization treatment can also increase the passing rate of the oil after the mud is attached to the filter screen of the filter element 32, and reduce the retention of the oil in front of / inside the filter element 32.

[0054] The primary filtrate after passing through the filter element 32 enters the branch pipe 3, and flows back into the oil pipeline 1 along the branch pipe 3, and then enters the next pressurizing cylinder 2 again, and undergoes secondary filtration after being pressurized again. The filtrate after multiple stages of filtration is finally discharged from the oil outlet into the oil storage tank for storage.

[0055] 2. When removing the filter element 32: In this embodiment, taking the first filter element 32 that needs to be replaced as an example: When replacing, open the first stop valve 34. At this time, the oil pipeline 1 between the branch pipe 3 and the pressure cylinder 2 in the same group is connected, and most of the oil flows directly into the next-level filter unit, and part of the oil still flows into the first pressure cylinder 2.

[0056] The threaded joint 10 is screwed, and the threaded joint 10 gradually separates from the branch pipe 3. In this process, under the pull of the spring 1, the hollow pipe 1 with the cone plug 12 gradually sinks into the cone-shaped closing mouth 11, and the cone-shaped closing mouth 11 is blocked. The filter tube 4 and the corresponding end of the branch pipe 3 are hung down, and the oil remaining in the filter tube 4 is collected with an oil barrel.

[0057] Then the threaded connector 2 9 is screwed, and the threaded connector 2 9 gradually separates from the pressurizing cylinder 2. In this process, under the pulling of the spring 2, the hollow tube 2 6 with the cone plug 2 7 gradually sinks into the cone-shaped closing 2 5, and the cone-shaped closing is blocked. At this time, the filter tube 4 is completely removed.

[0058] Under the action of spring one, spring two and the oil pressure in their respective pipelines, the cone plug 12 and the cone plug 2 7 are tightly embedded in the cone closing 11 and the cone closing 2 5 to increase the sealing performance of the branch pipe 3 and the pressure cylinder 2 ports.

[0059] Through the above two steps, the connection channels between the filter tube 4 and the branch pipe 3 and the pressure cylinder 2 are blocked, and the oil flows directly to the next filter unit through the stop valve 34, and the filtering operation can continue. The threaded joint 10 and the threaded joint 2 9 are screwed on until they fall off the branch pipe 3 and the pressure cylinder 2, so that the filter tube 4 can be removed and the filter element 32 can be replaced.

[0060] According to the above steps, the filter element 32 can be replaced without stopping the machine. In addition, during the replacement process, the position of the cone plug 12 and the cone plug 2 7 is changed to realize the conversion from opening to closing of the branch pipe 3 and the pressure cylinder 2, thereby avoiding the problem of oil seepage / gushing when the filter tube 4 is directly removed, reducing oil spillage, avoiding waste, and reducing the difficulty of cleaning the site.

[0061] 3. When installing filter element 32: Install the cleaned or new filter element 32 in the filter tube 4, and align the threaded joint 10 and the threaded joint 2 9 with the branch pipe 3 and the pressure cylinder 2 respectively. Then screw the threaded joint 10 and the threaded joint 2 9 synchronously, connect the filter tube 4, and then close the open stop valve 34, so that the filter unit can filter normally.

[0062] In this embodiment, when the filter element 32 is removed, a collection box is provided at the site below the filter tube 4 to collect the dripping oil.

[0063] In this embodiment, the filter tube 4 is connected to the pressurizing cylinder 2 by means of components such as a conical plug 27 and a conical closing 25, instead of setting a valve between the filter tube 4 and the pressurizing cylinder 2, and controlling the connection between the filter tube 4 and the pressurizing cylinder 2 by means of the valve. The reason is: first, a pressurizing cylinder 2 is provided in the pressurizing cylinder 2. Even if the valve is opened, the pressurized oil after being pressurized by the pressurizer will impact the valve plug in the valve body, and the long-term force erosion will reduce the service life of the valve. Second, the switch regulation by the valve still requires an additional connection structure between the filter tube 4 and the pressurizing cylinder 2, either by flange connection or by threaded connection; and the cooperation between the threaded joint 29 and the external thread at the end of the pressurizing cylinder 2 not only realizes the connection between the filter tube 4 and the pressurizing cylinder 2, but also controls the closing and opening of the conical plug 27 and the conical closing 25 by screwing the threaded joint 29, that is, the connection and switch control are integrated, which is convenient for disassembly and assembly, and there is no need to set an additional valve to withstand the erosion of the pressurized oil.

[0064] In this embodiment, the inner walls of the ends of the pressurizing cylinder 2 and the branch pipe 3 are provided with limiting rings, and the conical closing end 11 and the conical closing end 2 5 are respectively abutted against the corresponding limiting rings and fastened by screws, so that the conical closing end can be detachably installed in the corresponding pipeline, which is convenient for component replacement and maintenance.

[0065] In this embodiment, the inner conical surfaces of the conical closing opening 11 and the conical closing opening 2 5 are both straight inner cylindrical surfaces, and the upper ends of the conical plugs 12 and the conical plugs 2 7 are both provided with cylindrical bodies that match the inner cylindrical surfaces. Through the extended cylindrical surface and the cylindrical body, after the conical plug is sealed in the conical closing opening, the oil passage is completely concealed to prevent oil leakage.

[0066] Embodiment 2, in a further embodiment of the present scheme, the filter tube 4 is composed of a hard mounting tube 401 and a hose 402, the threaded joint 10 is rotatably mounted on the hose 402, and the threaded joint 29 is rotatably mounted on the mounting tube 401. Through the flexible deformation of the hose 402, a misalignment space is left for the filter when it is removed from the same branch pipe 3 and the pressurizing tube 2 at the same time. There are multiple platforms 33 in the annular array inside the mounting tube 401, and the filter element 32 is placed on the platforms 33. After the threaded joint 29 is screwed onto the pressurizing tube 2, the bottom end of the filter element 32 is abutted by the platform 33, and the inlet end of the filter element 32 is sleeved on the hollow tube 26. The filter element 32 is limited by the platform 33 and the hollow tube 26, so that the filter element 32 is stably installed in the filter tube 4; at the same time, after the filter tube 4 is removed from the pressurizing tube 2, the filter element 32 can be easily pulled out.

[0067] In this solution, the installation tube 401 is detachably connected to the hose 402. For example, a flange structure is used, or a threaded joint 3 is installed between the hose 402 and the installation tube 401, or an external thread and an internal thread are matched to achieve a detachable connection between the hose 402 and the installation tube 401. The hose 402 and the installation tube 401 are detachable, which is convenient for cleaning the internal mud and dirt after the pipeline is removed.

[0068] Embodiment 3, in a further embodiment of this scheme, when the oil flows from the pressure cylinder 2 to the filter tube 4, it will first directly hit the cone plug 12, and then pass through the cone plug 12 and the hollow tube 1 to the threaded connection between the threaded joint 2 9 and the pressure cylinder 2. In particular, the oil will also be increased by the pressurizer, and the threads of the threaded joint 2 9 and the outside of the pressure cylinder 2 are easily worn. Due to the structural setting between the pressure cylinder 2 and the oil pipeline 1, the equipment is easily scrapped after the threads are worn.

[0069] Therefore, in order to avoid the damage of a single part affecting the overall use of the equipment, in this embodiment: the pressurized cylinder 2 is detachably installed with a flange structure, which includes a flange plate 1 24 integrated with the port of the pressurized cylinder 2, and the flange plate 1 24 is connected to a flange plate 25 via a fastener, and the flange plate 25 is provided with a connecting pipe with external threads at one end away from the pressurized cylinder 2, and the connecting pipe is threadedly matched with the threaded joint 2 9. The external threads originally set on the outer wall of the pressurized cylinder 2 are transferred to the connecting pipe, and the connecting pipe can be disassembled and replaced with the flange plate 2 25, so that the threads can be replaced separately after being damaged, which will not affect the overall use of the equipment.

[0070] Embodiment 4, in a further embodiment of this scheme, a pressurizer structure used in the device of this scheme is provided: The pressurizer includes a rotating wheel 19 disposed outside the pressurizing cylinder 2, the rotating wheel 19 is rotatably mounted on a mounting seat disposed on a mounting base surface, and the rotating wheel 19 is driven to rotate by a power assembly. A cam-shaped cam groove 20 is provided on the rotating wheel 19, an insert 18 is inserted into the cam groove 20, and a push rod 16 is connected to the insert 18. The push rod 16 is inserted into the pressurizing cylinder 2 and axially slides with the end of the pressurizing cylinder 2 away from the filter tube 4, and a leather cup 17 is provided at the end of the push rod 16 extending into the pressurizing cylinder 2.

[0071] According to the above scheme: The power assembly drives the wheel 19 to rotate, and the insert 18 drives the push rod 16 to reciprocate in the pressurizing cylinder 2 along the cam groove 20 as the wheel 19 rotates, thereby driving the leather cup 17 to reciprocate in the pressurizing cylinder 2. The leather cup 17 moves toward the filter element 32, and the periphery of the leather cup 17 is supported outward and abuts against the inner wall of the pressurizing cylinder 2, thereby forming a plug effect, squeezing the oil toward the filter element 32 to achieve a pressurization effect; the leather cup 17 moves away from the filter element 32, and the periphery of the leather cup 17 shrinks under the action of the oil input hydraulic pressure, and a gap is formed between the periphery of the leather cup 17 and the inner wall of the pressurizing cylinder 2, and the oil flows from the gap through the leather cup 17 to the filter element 32, that is, the reset of the leather cup 17 does not affect the flow of the oil or has a small effect.

[0072] In this embodiment, the leather cup 17 is a multiple structure, which forms a multiple expansion and sealing effect with the inner wall of the pressurizing cylinder 2 when it is increased, so as to avoid the problem that the single-layer leather cup 17 is increased and the single-layer outer support is flipped and deformed and cannot squeeze the oil pressure, resulting in the failure of the boosting.

[0073] In this embodiment, the end surface of the pressurizing cylinder 2 away from the filter tube 4 is installed with a flange cover 26 through a fastener, and the axial center of the flange cover 26 is provided with a mounting hole for the push rod 16 to slide and install, so as to insert the push rod 16 and replace the leather cup 17.

[0074] In this embodiment, preferably, a positioning ring is provided between the assembly ring 2 15 and the conical closing 2, which is used to limit the extension distance of the cone plug 2 7 toward the leather cup 17 in the pressurizing cylinder 2. In this way, after the threaded joint 2 9 is connected to the threaded connection of the connecting pipe, the inlet end of the filter element 32 is buckled on the port of the hollow tube 2 6, and moves against the assembly ring 2 15 to abut against the positioning ring. In this way, the cone plug 2 7 is fixed under the low pressure of the filter element 32 and the limitation of the positioning ring after the oil is passed through the oil port 2 8. In this way, during the reciprocating movement of the leather cup 17, the cone plug 2 7 will not continue to move due to the change of the pressure difference, such as when the leather cup 17 is away from the filter element 32, the oil pressure decreases at this time, and the cone plug 2 7 is limited, that is, the stability of the component installation is maintained; it also avoids the tightness of the connection between the hollow tube 2 6 and the inlet end of the filter element 32 to ensure the normal filtration of the oil.

[0075] Embodiment 5, in a further embodiment of the present scheme, as the rotating wheel 19 is driven, the leather cup 17 is always increasing pressure in the pressurizing cylinder 2. Then, when the filter element 32 is replaced, the pressurizing cylinder 2 continues to increase pressure, which will have the opposite effect. Therefore, in the present embodiment, the push rod 16 is extended out of the pressurizing cylinder 2 and an open cylinder 21 is installed at one end, and both ends of the open cylinder 21 are provided with openings. The insert 18 is axially slidably installed in the opening at one end where the open cylinder 21 is connected to the push rod 16, and the other side opening is a threading hole. The insert 18 is extended into the open cylinder 21 and a metal ring 23 is installed at one end, and a spring 3 is provided between the metal ring 23 and the insert 18. An electromagnet 22 is provided in the open cylinder 21 on the side of the metal ring 23 away from the rotating wheel 19. The circuit of the electromagnet 22 is connected to an external power supply through the threading hole for energy supply.

[0076] According to the above technical solution: During filtering, the electromagnet 22 is closed, and the spring 3 sinks against the metal ring 23 to insert the insert 18 into the cam groove 20. At this time, the insert 18 is connected to the rotating wheel 19, and a pressurization process can be performed.

[0077] When replacing the filter element 32, the electromagnet 22 is turned on, the metal ring 23 is attracted and rises, and the insert 18 is separated from the cam groove 20. At this time, the push rod 16 in the pressurizing cylinder 2 stops moving, and then the pressurization process is stopped, and the oil is no longer retained in the pressurizing cylinder 2. After the filter element 32 is replaced, when the insert 18 is directly below the rotating wheel 19 (not falling empty), the electromagnet 22 is turned off, and the insert 18 descends under the action of gravity and spring three: if the insert 18 is not aligned with the cam groove 20, then the insert 18 will be against the end face of the rotating wheel 19 until the insert 18 is aligned with the cam groove 20; then under the action of spring three, the insert 18 is inserted into the cam groove 20 to achieve the connection between the push rod 16 and the rotating wheel 19.

[0078] In this embodiment, the oil pipeline 1 is arranged in a loop, the rotating wheel 19 is arranged at the inner axis of the annular structure of the oil pipeline 1, and the inserts 18 on the push rods 16 corresponding to the multiple pressurizing cylinders 2 are all inserted into the same cam groove 20. Therefore, the same rotating wheel 19 drives all the push rods 16 to move, simplifying the structure.

[0079] In this embodiment, the pressure cylinder 2 is arranged perpendicular to the oil pipeline 1, and the branch pipe 3 is arranged along the tangent of the oil pipeline 1. The branch pipe 3 is tangent to the oil pipeline 1, and the cutting direction is away from the corresponding pressure cylinder 2, so as to prevent the oil in the oil pipeline 1 input by the branch pipe 3 from impacting the inner wall of the oil pipeline 1 and causing oil backflow, thereby affecting the flow of oil.

[0080] In this embodiment, the power assembly includes a worm wheel 29 mounted on the rotating shaft of the rotating wheel 19, the worm wheel is meshed with a worm 30, and the worm 30 is connected to a reduction motor 31 via a chain drive. Power is provided by the reduction motor 31. At the same time, the transmission structure of the worm wheel 29 and the worm 30 has a self-locking property to ensure the stability of the push rod 16 being driven.

[0081] Embodiment 6, in a further embodiment of the present scheme, in this embodiment, a sealing gasket 3 27 connected by mortise and tenon is provided between the flange cover 26 and the end face of the pressure cylinder 2, and between the flange plate 1 24 and the flange plate 2 25. The sealing gasket 3 27 includes an annular gasket and annular sealing strips provided on both sides of the gasket, and an annular sealing groove is provided on the end face corresponding to the flange cover 26 and the pressure cylinder 2, and on the end face corresponding to the flange plate 1 24 and the flange plate 2 25. During installation, the sealing strip of the sealing gasket 3 27 is embedded in the sealing groove, so that a plug-in mortise and tenon structure is formed between the sealing gasket 3 27 and the flange cover 26 and the end face of the pressure cylinder 2, and the sealing performance is greatly improved.

[0082] Embodiment 7, in a further embodiment of the present scheme, also includes a backwashing system for backwashing and cleaning the filter element 32.

[0083] The backwash system includes a gas-liquid mixer, which is provided with an air inlet and a liquid inlet, and valves are provided on the air inlet and the liquid inlet. The air inlet is connected to a hot steam supply system for supplying compressed hot steam. The liquid inlet is connected to a liquid storage tank, and a degreasing agent is provided inside the liquid storage tank for washing oil stains. The air inlet is arranged on the end face of the gas-liquid mixer, and the liquid inlet is arranged on the side wall of the gas-liquid mixer. The air inlet and the liquid inlet are adjacent to each other and arranged vertically, so that the hot steam and the degreasing agent enter the gas-liquid mixer and impact vertically to form a vortex flow, so that the hot steam and the degreasing agent are evenly mixed. A drain port is provided on the gas-liquid mixer at one end away from the air inlet, and a main pipe is connected to the drain port. The main pipe is provided with branch pipes corresponding to the pressure cylinder 2 one by one, and each branch pipe is also provided with a valve. The other end of the branch pipe is connected to the side wall of the pressure cylinder 2. A drain pipe is also provided on the filter tube 4 near the branch pipe 3, and a valve is also provided on the drain pipe. The drain pipe is connected to a waste liquid collection tank.

[0084] The filter tube 4 is provided with an exhaust pipe, and the exhaust pipe is also provided with a valve and a pressure regulating valve.

[0085] Valves are provided at the oil inlet and the oil outlet of the oil delivery pipe 1.

[0086] According to the above technical solution: When backwashing is performed, the oil supply to the oil pipeline 1 is stopped, the pressure booster is turned off, the valves at the oil inlet and outlet of the oil pipeline 1 are closed, and the valve on the exhaust pipe is opened.

[0087] The threaded joint 10 is screwed until it reaches the middle of the external thread of the side wall of the branch pipe 3, and the conical plug 12 closes the conical end 11, thereby sealing the branch pipe 3 and the filter tube 4.

[0088] Then, hot steam and degreasing agent are injected into the gas-liquid mixer, and the mixed gas is injected into the main pipe, and enters each pressurized cylinder 2 along each branch pipe, and finally enters the filter element 32. The air pressure in the filter tube 4 increases. When the pressure reaches a certain level, the valve on the drain pipe opens, and the mixed gas in the filter forms a higher flow rate under the action of the pressure difference, and the filter element 32 is flushed with high pressure to wash away the adhered impurities, and then discharged from the filter tube 4 from the drain pipe, completing the backwashing process.

[0089] After flushing is complete, all components are reset and the oil filtration process continues.

[0090] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0092] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A filtering device for petrochemical industry, characterized in that: include: An oil delivery pipe (1), wherein the oil delivery pipe (1) is provided with an oil inlet and an oil outlet for inputting and outputting oil; A plurality of branch pipes (3) are provided at intervals on the oil pipeline (1); The filter tube (4) corresponds to the branch tube (3) one by one, and the two ends of the filter tube (4) are rotatably mounted with a threaded joint (10) and a threaded joint (9), respectively. The threaded joint (10) is threadedly connected to the end of the branch tube (3). A filter element (32) is provided in the filter tube (4) for filtering the oil, and the filtering accuracy of the plurality of filter elements (32) gradually increases. The pressure cylinder (2) corresponds to the branch pipe (3) one by one. The pressure cylinder (2) penetrates the side wall of the oil delivery pipe (1) and is connected to the oil delivery pipe (1). The port of the pressure cylinder (2) is threadedly connected to the second threaded joint (9). A pressure booster is provided in the pressure cylinder (2) for increasing the power of the oil in the filter pipe (4) to pass through the filter element (32) and accelerate the flow of the oil. A stop valve (34), each of which is provided between the plurality of branch pipes (3) and the pressure cylinder (2) on the oil pipeline (1) and is used to cut off the oil pipeline (1) and guide the flow of oil in the oil pipeline (1); The pressurizing cylinder (2), the branch pipe (3) and the end connected to the filter pipe (4) are all provided with a conical end, the conical surface of the conical end is arranged away from the filter pipe (4), a hollow pipe is inserted into the conical end, and the end of the hollow pipe away from the filter pipe (4) is provided with a conical plug that matches the conical end, a spring is provided between the conical plug and the conical end, and a plurality of oil through holes in a circular array on the conical surface of the conical plug are communicated with the inside of the hollow pipe; the end of the hollow pipe in the pressurizing cylinder (2) facing the filter pipe (4) is against the inlet of the filter element (32); and a push cylinder (13) is provided in the threaded joint (10) to be against the hollow pipe in the branch pipe (3).

2. A petrochemical filtering device according to claim 1, characterized in that: The filter tube (4) is composed of a hard mounting tube (401) and a hose (402), a first threaded joint (10) is rotatably mounted on the hose (402), a second threaded joint (9) is rotatably mounted on the mounting tube (401), a plurality of platforms (33) are provided in a circular array inside the mounting tube (401), and the filter element (32) is mounted on the platforms (33).

3. A petrochemical filtering device according to claim 2, characterized in that: The installation cylinder (401) is detachably connected to the hose (402).

4. A petrochemical filtering device according to claim 1, characterized in that: The pressurizing cylinder (2) is detachably mounted with a flange structure, and the flange structure is threadedly connected to a threaded joint facing the pressurizing cylinder (2).

5. A petrochemical filtering device according to claim 1, characterized in that: The pressurizer comprises a rotating wheel (19) arranged outside the pressurizing cylinder (2), the rotating wheel (19) being driven to rotate by a power assembly, a cam groove (20) being provided on the rotating wheel (19), an insert (18) being inserted into the cam groove (20), the insert (18) being connected to a push rod (16), the push rod (16) being inserted into the pressurizing cylinder (2) and axially slidingly engaged with one end of the pressurizing cylinder (2) facing away from the filter tube (4), and a leather cup (17) being provided at one end of the push rod (16) extending into the pressurizing cylinder (2).

6. A petrochemical filtering device according to claim 5, characterized in that: An open cylinder (21) is installed at one end of the push rod (16) extending out of the pressurizing cylinder (2), an insert (18) is axially slidably installed at the end of the open cylinder (21), a metal ring (23) is installed at one end of the insert (18) extending into the open cylinder (21), a spring (3) is provided between the metal ring (23) and the insert (18), and an electromagnet (22) is provided in the open cylinder (21) on the side of the metal ring (23) away from the rotating wheel (19).

7. A petrochemical filtering device according to claim 5, characterized in that: The oil delivery pipe (1) is arranged in a loop, the rotating wheel (19) is arranged at the inner axis of the annular structure of the oil delivery pipe (1), and the inserts (18) on the push rods (16) corresponding to the plurality of pressurizing cylinders (2) are all inserted into the same cam groove (20).

8. A petrochemical filtering device according to claim 7, characterized in that: The pressurizing cylinder (2) is arranged perpendicular to the oil pipeline (1), and the branch pipe (3) is arranged along a tangent line of the oil pipeline (1).

9. A petrochemical filtering device according to claim 5, characterized in that: The power assembly comprises a worm wheel (29) mounted on the rotating shaft of the rotating wheel (19), the worm wheel is meshed with a worm (30), and the worm (30) is connected to a reduction motor (31) via a chain drive.

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