A filtering device for petrochemical industry

Abstract

The present invention relates to the technical field of filtering equipment, and particularly to a filtering device for petrochemical industry. It includes: an oil pipeline, a branch pipe, a filtering pipe, a pressure cylinder, and a stop valve. At one end where the pressure cylinder, the branch pipe and the filtering pipe are connected, a tapered necking is provided inside. The conical surface of the tapered necking is set away from the filtering pipe. A hollow pipe is inserted into the tapered necking. At one end of the hollow pipe away from the filtering pipe, there is a conical plug that cooperates with the tapered necking. A spring is provided between the conical plug and the tapered necking. A plurality of oil ports communicating with the inside of the hollow pipe are annularly arranged on the conical surface of the conical plug; one end of the hollow pipe in the pressure cylinder facing the filtering pipe abuts against the filter element inlet; a push cylinder that abuts against the hollow pipe in the branch pipe is provided inside the first threaded joint. The non-stop replacement of the filter element is realized. And during the replacement process, the conversion from the opening to the closing of the branch pipe and the pressure cylinder is realized, so as to avoid the problem of oil leakage / gushing when directly disassembling the filtering pipe, and reduce the oil spillage.

Description

Technical Field

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

[0002] The petrochemical industry, abbreviated as petrochemicals. Generally refers to the processing industry that uses petroleum and natural gas as raw materials to produce petroleum products and petrochemical products, and is an important part of the chemical industry. Most of the products from oil wells contain impurities such as water and sand, and some mineral salts are also dissolved in the water. During transportation, the sediment entrained in the crude oil will clog pipelines and storage tanks, causing equipment wear, and even scaling and corrosion inside the equipment. Therefore, the crude oil must be purified and processed to become a qualified product that meets the requirements for external transportation.

[0003] The purification of crude oil is mainly through filtration. The common filtration method is the filter screen type oil filtration method: a filter element is used to filter out smaller solid shells in the oil liquid to achieve the purpose of oil liquid purification. However, it should be known that after long-term operation, the dirt holding capacity of the filter screen in the filter element reaches saturation. At this time, the filter element not only fails to play a purification role, but will instead cause an increase in oil pressure, posing a hazard to the system. Therefore, the filter element must be replaced before it reaches saturation, which requires shutdown operation and affects the overall purification efficiency of the oil liquid.

[0004] Moreover, in the traditional filter screen type oil filtration method, for single-stage filtration, if there is only one set of filtration equipment, then to maximize the purification level of the filter element, it is required to filter out solid impurities as much as possible, thereby accelerating the saturation process of the dirt holding capacity of the filter element and shortening the single-use duration of the filter element; while if there are multiple sets of filtration equipment arranged in sequence according to filtration precision, then when replacing the filter element of the front-side filtration equipment, shutdown operation is still required, affecting the efficiency.

[0005] Therefore, the present invention provides a filtering device for petrochemical industry, which performs multi-stage filtration treatment on the oil liquid to improve the purification precision and reduce the impurity content of the oil liquid; at the same time, the composition of the entire multi-stage filtration equipment is improved so that the filter element can be replaced without shutdown, without affecting the overall purification process of the oil liquid. 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] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A filtering device for petrochemical industry, comprising:

[0009] An oil pipeline, on which an oil inlet and an oil outlet are provided for input and output of the oil liquid;

[0010] Branch pipes, a plurality of which are arranged at intervals on the oil pipeline;

[0011] 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;

[0012] 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.

[0013] 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;

[0014] 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.

[0015] 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.

[0016] Preferably, the mounting tube is detachably connected to the hose.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Preferably, the oil pipeline is looped, the runner is arranged at the inner axis of the annular structure of the oil pipeline, and the inserts on the push rods corresponding to the plurality of pressure cylinders are all inserted into the same cam groove.

[0021] Preferably, the pressure cylinder is arranged vertically to the oil pipeline, and the branch pipe is arranged along the tangent of the oil pipeline.

[0022] Preferably, the power assembly includes a worm gear installed on the rotating shaft of the runner, the worm gear meshes with a worm, and the worm is connected to a reduction motor through a chain drive.

[0023] Compared with the prior art, the present invention provides a filtering device for petrochemical industry, which has the following beneficial effects:

[0024] 1. The present invention realizes the replacement of the filter element without shutting down the machine, without affecting the overall purification process of the oil fluid. And during the replacement process, with the position change of the first taper plug and the second taper plug, the conversion from opening to closing of the branch pipe and the pressure cylinder is realized, thus avoiding the problem of oil fluid seepage / gushing when directly disassembling the filter pipe, reducing the oil fluid spillage, which not only avoids waste but also reduces the cleaning difficulty of the site.

[0025] 2. In the present invention, the filter pipe and the pressure cylinder are connected through components such as the second taper plug and the tapered closing opening two. It not only realizes the connection between the filter pipe and the pressure cylinder, but also controls the closing and opening of the second taper plug and the tapered closing opening two by screwing the second threaded joint, that is, integrating connection and switch control, which is convenient for disassembly and assembly and does not require an additional valve to withstand the erosion of the pressurized oil fluid.

[0026] 3. The present invention is provided with a plurality of filtering units on the oil pipeline to realize multiple filtrations, making the filtering effect of the oil fluid better. Moreover, the filtering precision of the filtering units increases step by step, and the oil fluid is subjected to multi-stage filtering treatment to improve the purification precision and reduce the impurity content of the oil fluid; at the same time, the dirt holding capacity of each filtering unit is separated, prolonging the time when the filter element reaches the saturation of the dirt holding capacity, that is, prolonging the service life of the filter element.

[0027] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a top perspective schematic diagram of the present invention.

[0029] Figure 2 It is a bottom perspective schematic diagram of the present invention.

[0030] Figure 3 It is a front view schematic diagram of the present invention.

[0031] Figure 4 Schematic side view of the present invention.

[0032] Figure 5 Schematic perspective view of the power component structure of multiple pressure boosters of the present invention.

[0033] Figure 6 Schematic top view of the present invention.

[0034] Figure 7 Schematic axial horizontal sectional view of the oil pipeline of the present invention.

[0035] Figure 8 For the present invention Figure 7 Partial schematic view at location A.

[0036] Figure 9 For the present invention Figure 7 Schematic view of the connection between the filter pipe, branch pipe and pressure cylinder of the present invention.

[0037] Figure 10 For the present invention Figure 9 Schematic view of the separation state of the present invention.

[0038] Figure 11 Right view, front elevation sectional view and left view of the installation cylinder of the present invention.

[0039] Figure 12 Schematic view of the separation of the second tapered plug and the second tapered closing of the present invention;

[0040] Figure 13 Schematic perspective view of the filter pipe assembly of the present invention.

[0041] Figure 14 Schematic three-dimensional and exploded views of the connection between the filter element, hollow tube, tapered closing and tapered plug of the present invention.

[0042] Figure 15 For the present invention Figure 5 Schematic perspective view after removing the runner of the present invention.

[0043] Figure 16 Assembly sectional view of the push rod of the present invention.

[0044] Figure 17 For the present invention Figure 8 Partial schematic view at location B.

[0045] Figure 18 Operation principle diagram of the present invention.

[0046] Figure 19 For the present invention Figure 18 Operation principle diagram of the filter system of the present invention.

[0047] Figure 20For the present invention Figure 18 is the schematic diagram of the backwashing system operation of

[0048] In the figure: 1, oil pipeline; 2, pressure cylinder; 3, branch pipe; 4, filter pipe; 401, installation cylinder; 402, hose; 5, conical shrinkage two; 6, hollow pipe two; 7, cone plug two; 8, oil port two; 9, threaded joint two; 10, threaded joint one; 11, conical shrinkage 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, gasket three; 28, bracket; 29, worm gear; 30, worm; 31, reduction motor; 32, filter element; 33, platform; 34, globe valve. Specific embodiments

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached Figure 1-20 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.

[0050] 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:

[0051] Oil pipeline 1, which is provided with an oil inlet and an oil outlet for the input and output of oil fluid;

[0052] Branch pipes 3, and a plurality of branch pipes 3 are arranged at intervals on the oil pipeline 1;

[0053] Filter pipes 4, corresponding to the branch pipes 3 one by one. The two ends of the filter pipe 4 are respectively rotatably installed with a threaded joint one 10 and a threaded joint two 9. The threaded joint one 10 is threadedly connected to the port of the branch pipe 3. The filter pipe 4 is internally provided with a filter element 32 for filtering the oil fluid, and the filtering precisions of the plurality of filter elements 32 gradually increase;

[0054] 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 are communicated 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 provided inside the pressure cylinder 2 for increasing the power of the oil fluid in the filter pipe 4 to pass through the filter element 32 and accelerating the oil fluid flow;

[0055] Globe valve 34, and globe valves 34 are provided 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;

[0056] One end of the pressure cylinder 2, the branch pipe 3 and the filter pipe 4, which are connected to each other, is internally provided with a tapered necking. The tapered surface of the tapered necking faces away from the filter pipe 4. A hollow pipe is inserted into the tapered necking. One end of the hollow pipe facing away from the filter pipe 4 is provided with a tapered plug that cooperates with the tapered necking. A spring is arranged between the tapered plug and the tapered necking. A plurality of oil ports communicating with the inside of the hollow pipe are annularly arranged on the tapered surface of the tapered plug; one end of the hollow pipe in the pressure cylinder 2 abuts against the inlet of the filter element 32. A push cylinder 13 that abuts against the hollow pipe in the branch pipe 3 is arranged in the threaded joint 10.

[0057] Details of the principle of this embodiment:

[0058] A filtering device for petrochemical industry, comprising: an oil pipeline 1, two ports of the oil pipeline 1 are respectively an oil inlet and an oil outlet, which are used for the input and output of oil. The oil inlet is externally connected with 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 with an oil storage tank, which is used for receiving and temporarily storing the filtered oil. A plurality of supports 28 are arranged at intervals on the oil pipeline 1, which are used for supporting and erecting the oil pipeline 1. The input and output of oil are powered by an external pump.

[0059] A plurality of branch pipes 3 are connected to the oil pipeline 1 at intervals. The branch pipes 3 are connected to the oil pipeline 1 through a flange structure, so that the branch pipes 3 are detachable, which is convenient for subsequent maintenance and replacement.

[0060] External threads are provided at the ports of each branch pipe 3, and a threaded joint 10 is threadedly installed on the external threads. A filter pipe 4 is rotatably installed at one end of the threaded joint 10 facing away from the branch pipe 3. A filter element 32 is arranged in the filter pipe 4, forming a pipeline-type filter structure. Along the direction from the oil inlet to the oil outlet, the purification precision of the plurality of filter elements 32 on one oil pipeline 1 gradually increases, that is, the size of the solid impurity particles that can be filtered becomes smaller and smaller.

[0061] Threaded joints 9 are rotatably installed at the ports of each filter pipe 4 facing away from the threaded joints 10. The threaded joints 9 are threadedly connected with pressure cylinders 2. The pressure cylinders 2 are located on the oil pipeline 1 on the side of the corresponding branch pipes 3 facing the oil inlet of the oil pipeline 1. The threaded joint 9 is an internal thread component, and an external thread is provided on the outer wall of the pressure cylinder 2, so as to realize the threaded connection between the threaded joint 9 and the pressure cylinder 2.

[0062] The pressure cylinder 2 penetrates 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 communicates with the inside of the oil pipeline 1.

[0063] A pressure booster is arranged in the pressure cylinder 2, and the oil flowing into the pressure cylinder 2 is pressurized by the pressure booster, which is used to increase the power of the oil in the filter pipe 4 to pass through the filter element 32 and accelerate the oil flow.

[0064] 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.

[0065] 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:

[0066] 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.

[0067] 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.

[0068] 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.

[0069] According to the above technical solution:

[0070] 1. When purifying oil:

[0071] 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.

[0072] 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.

[0073] The primary filtrate after passing through the filter element 32 enters the branch pipe 3, and then flows back into the oil pipeline 1 along the branch pipe 3 again. Then it enters the next pressure cylinder 2 again. After being pressurized again, it undergoes secondary filtration. The filtrate after experiencing multiple filtrations finally drains out from the oil outlet and is stored in the storage oil tank.

[0074] 2. When removing the filter element 32:

[0075] In this embodiment, taking the replacement of the first filter element 32 as an example:

[0076] 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 penetrated, and most of the oil flows directly into the next-level filtration unit, and part of the oil still flows into the first pressure cylinder 2.

[0077] Screw the first threaded joint 10. The first threaded joint 10 gradually detaches from the branch pipe 3. During this process, under the traction of the first spring, the hollow pipe 1 with the conical plug 12 gradually sinks into the conical opening 11. At this time, the conical opening 11 is blocked. Let the corresponding end of the filter pipe 4 droop with the branch pipe 3, and use an oil barrel to catch the remaining oil in the filter pipe 4.

[0078] Then screw the second threaded joint 9. The second threaded joint 9 gradually detaches from the pressure cylinder 2. During this process, under the traction of the second spring, the hollow pipe 6 with the conical plug 7 gradually sinks into the conical opening 5. At this time, the conical opening is blocked. At this time, the filter pipe 4 is completely removed.

[0079] The conical plug 12 and the conical plug 7 are tightly embedded in the conical opening 11 and the conical opening 5 under the action of the first spring, the second spring and the oil pressure in their respective pipelines, increasing the sealing performance of the ports of the branch pipe 3 and the pressure cylinder 2.

[0080] Through the above two steps, the connection channels between the filter pipe 4 and the branch pipe 3 and the pressure cylinder 2 are blocked, and the oil fluid directly passes through the stop valve 34 to the next-level filtration unit and can continue the filtration operation. Continuing to screw the first threaded joint 10 and the second threaded joint 9 until they fall off from the branch pipe 3 and the pressure cylinder 2, so as to remove the filter pipe 4, and then the filter element 32 can be replaced.

[0081] According to the above steps, the filter element 32 can be replaced without stopping the machine. And during the replacement process, with the position change of the conical plug 12 and the conical plug 7, the conversion from the opening to the closing of the branch pipe 3 and the pressure cylinder 2 is realized, thus avoiding the problem of oil leakage / gushing when directly removing the filter pipe 4, reducing the oil spillage, that is, avoiding waste and reducing the cleaning difficulty of the site.

[0082] 3. When installing the filter element 32:

[0083] Install the cleaned or new filter element 32 into the filter tube 4, and align the first threaded joint 10 and the second threaded joint 9 with the branch pipe 3 and the pressure cylinder 2 respectively. Then synchronously screw the first threaded joint 10 and the second threaded joint 9 to connect the filter tube 4. After that, close the opened stop valve 34 to enable the normal filtration operation of the filtration unit.

[0084] In this embodiment, when disassembling the filter element 32, a collection box should be provided below the filter tube 4 at the site to receive the dripping oil.

[0085] In this embodiment, the filter tube 4 and the pressure cylinder 2 are connected by components such as the second taper plug 7 and the second tapered necking 5, rather than setting a valve between the filter tube 4 and the pressure cylinder 2 to control the connection between the filter tube 4 and the pressure cylinder 2. The reasons are as follows: Firstly, there is a pressure device in the pressure cylinder 2. Even if the valve is opened, the pressurized oil after being pressurized by the pressure device will impact on the valve plug in the valve body. After being subjected to the force scouring for a long time, the service life of the valve will be reduced. Secondly, when using a valve for switching control, an additional connection structure between the filter tube 4 and the pressure cylinder 2 still needs to be set, either through flange connection or through threaded connection; while through the cooperation between the second threaded joint 9 and the external thread at the end of the pressure cylinder 2, not only the connection between the filter tube 4 and the pressure cylinder 2 is realized, but also the closing and opening of the second taper plug 7 and the second tapered necking 5 are controlled by screwing the second threaded joint 9, that is, the connection and the switch control are integrated, which is convenient for disassembly and installation and does not require an additional valve to withstand the scouring of the pressurized oil.

[0086] In this embodiment, limiting rings are provided on the inner walls at the ends of the pressure cylinder 2 and the branch pipe 3. The first tapered necking 11 and the second tapered necking 5 respectively abut against the corresponding limiting rings and are fastened by screws, so as to detachably install the tapered necking in the corresponding pipeline, which is convenient for component replacement and maintenance.

[0087] In this embodiment, the inner conical surfaces of the first tapered necking 11 and the second tapered necking 5 are straight cylindrical surfaces above, and the upper ends of the first taper plug 12 and the second taper plug 7 are both provided with cylinders that fit with the inner cylindrical surfaces. Through the extended cylindrical surface and the cylinder, after the taper plug is sealed into the tapered necking, the oil passage opening is completely concealed to prevent oil leakage.

[0088] 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.

[0089] 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 used 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.

[0090] 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.

[0091] 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, and will not affect the overall use of the equipment.

[0092] Embodiment 4, in a further embodiment of this scheme, a pressurizer structure used in the device of this scheme is provided:

[0093] 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.

[0094] According to the above scheme:

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] According to the above technical solution:

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] In this embodiment, the power assembly includes a worm gear 29 installed on the rotating shaft of the runner 19. The worm gear meshes with a worm 30, and the worm 30 is connected to a reduction motor 31 through a chain drive. The reduction motor 31 provides power. At the same time, the worm gear 29 and worm 30 transmission structure has self-locking property to ensure the stability of the driven push rod 16.

[0106] Embodiment 6, in a further embodiment of this solution, in this embodiment, a gasket three 27 with mortise and tenon connection is provided between the flange cover 26 and the end face of the pressure cylinder 2, and between the first flange 24 and the second flange 25. The gasket three 27 includes an annular washer and annular sealing strips provided on both sides of the washer, and annular sealing grooves are provided on the corresponding end faces of the flange cover 26 and the pressure cylinder 2, and on the corresponding end faces of the first flange 24 and the second flange 25. During installation, the sealing strips of the gasket three 27 are embedded in the sealing grooves, so that a plug-in mortise and tenon structure is formed between the gasket three 27 and the flange cover 26 and the end face of the pressure cylinder 2, greatly improving the sealing performance.

[0107] Embodiment 7, in a further embodiment of this solution, it further includes a backwashing system for backwashing and cleaning the filter element 32.

[0108] The backwashing system includes a gas-liquid mixer. The gas-liquid mixer is provided with an air inlet and a liquid inlet, and valves are provided on both 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 and perpendicular to each other, so that the hot steam and the degreasing agent vertically impact after entering the gas-liquid mixer to form a vortex flow, making the hot steam and the degreasing agent mix evenly. A drain port is provided at one end of the gas-liquid mixer away from the air inlet. A main pipe is connected to the drain port, and branch pipes corresponding to the pressure cylinders 2 one by one are provided on the main pipe, and valves are also provided on each branch pipe. The other end of the branch pipe communicates with the side wall of the pressure cylinder 2. A drain pipe is also provided on the filter pipe 4 near the branch pipe 3, and a valve is provided on the drain pipe. The drain pipe is connected to a waste liquid collection pool.

[0109] An exhaust pipe is provided on the filter pipe 4, and a valve and a pressure regulating valve are also provided on the exhaust pipe.

[0110] Valves are provided at both the oil inlet and the oil outlet of the oil pipeline 1.

[0111] According to the above technical solution:

[0112] During backwashing, the oil pipeline 1 stops supplying oil, the pressure booster is closed, the valves at the oil inlet and the oil outlet of the oil pipeline 1 are closed, and the valve on the exhaust pipe is opened.

[0113] Screw the threaded joint 10 until it reaches the middle of the external thread on the side wall of the branch pipe 3. The tapered plug 12 seals the tapered opening 11, and the space between the branch pipe 3 and the filter pipe 4 is sealed.

[0114] Then, inject hot steam and degreasing agent into the gas-liquid mixer. After mixing, the mixed gas is injected into the main pipe and enters each pressurizing cylinder 2 along each branch pipe, and finally enters the filter element 32. The air pressure in the filter pipe 4 increases. When the pressure reaches a certain level, the valve on the drain pipe opens. Under the action of the pressure difference, the mixed gas in the filter forms a relatively high flow rate and performs a high-pressure flushing on the filter element 32, so that the adhered impurities are washed away and discharged from the drain pipe out of the filter pipe 4, completing the backwashing process.

[0115] After the flushing is completed, all components are reset, and the oil filtration process continues.

[0116] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0117] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0118] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to 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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