A multi-purpose furnace quenching oil on-line circulation filtering system based on track moving trolley

Abstract

The present application relates to quenching oil online purification equipment technical field, specifically relates to a kind of multi-purpose furnace quenching oil online circulation filtering system based on track mobile trolley.The specific technical scheme is: a kind of multi-purpose furnace quenching oil online circulation filtering system based on track mobile trolley, including trolley and filter oiler being set on trolley, pipeline butt joint mechanism is arranged on the trolley, the pipeline butt joint mechanism is automatically connected with the quenching oil pool of multi-purpose furnace by locking mechanism, the locking mechanism includes fixed pipe and movable pipe being rotatably connected with fixed pipe, the connecting pipe of movable pipe and pipeline butt joint mechanism is connected by thread.The present application solves the problem that fixed filtering equipment cannot be shared by multiple furnaces in the prior art, and realizes that one filtering equipment can be served by multiple furnaces through track movement.

Description

Technical Field

[0001] This invention relates to the field of online quenching oil purification equipment, specifically to an online circulating filtration system for multi-purpose furnace quenching oil based on a track-mounted moving trolley. Background Technology

[0002] During long-term use, multi-purpose furnace quenching oil will mix with impurities such as oxide scale, carbon slag, and metal powder, which will lead to a decrease in oil viscosity and cooling performance, affecting the quenching quality of workpieces, and will also aggravate equipment wear and shorten the service life of the quenching oil.

[0003] The existing quenching oil filtration system requires manual disassembly and assembly of the inlet and outlet pipes to the furnace oil pool and tank, which is cumbersome and inefficient. Furthermore, most filtration equipment is fixedly installed, with one unit serving only a single multi-purpose furnace. When multiple furnaces share the system, frequent moving and disassembly are necessary, resulting in extremely poor flexibility. Additionally, the oil extraction and return processes are flawed. Directly drawing oil from the bottom of the quenching oil pool easily draws in sediment, and during oil return, the impact on the liquid surface stirs up impurities, reducing filtration efficiency and affecting the stability of the oil pool level. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-purpose furnace quenching oil online circulation filtration system based on a track-moving trolley. This system solves the problem that fixed filtration equipment cannot be shared by multiple furnaces in existing technologies, enabling a single filtration device to be moved along a track and serve multiple furnaces in rotation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention discloses an online circulating filtration system for quenching oil in a multi-purpose furnace based on a track-moving trolley, comprising a trolley and an oil filter mounted on the trolley. The trolley is equipped with a pipe docking mechanism, which is automatically connected to the quenching oil tank of the multi-purpose furnace via a locking mechanism. The locking mechanism includes a fixed pipe and a movable pipe rotatably connected to the fixed pipe. The movable pipe is connected to the connecting pipe of the pipe docking mechanism via a threaded connection.

[0007] Preferably, the quenching oil tank and the auxiliary oil tank are connected by an oil tank outlet pipe, and the liquid levels of the quenching oil tank and the auxiliary oil tank are the same; the quenching oil tank and the return oil tank are connected by a return oil pipe, the bottom of the return oil tank is higher than the liquid level of the quenching oil tank, one end of the return oil pipe is located near the bottom of the return oil tank, and the other end is located near the upper part of the quenching oil tank, extending into the quenching oil tank and with the port of the return oil pipe below the liquid surface of the quenching oil tank; the auxiliary oil tank and the return oil tank are respectively provided with locking mechanisms.

[0008] Preferably, the locking mechanism on the auxiliary oil tank is located near the bottom of the auxiliary oil tank, and the locking mechanism on the return oil trough is located in the upper part of the return oil trough (e.g., 1 / 2-2 / 3 of the way). There are two pipe docking mechanisms, which are respectively connected to the two locking mechanisms.

[0009] Preferably, the fixing tube of the locking mechanism on the auxiliary oil tank is fixed to and connected to the side wall of the auxiliary oil tank. The other end of the fixing tube extends into the movable tube. The outer wall of the movable tube is provided with a limiting shell with an L-shaped cross section, forming an annular groove with the outer wall of the movable tube. A first bearing is fixedly mounted on the outer sleeve of the fixing tube. One end of the first bearing extends into the annular groove and fixes the outer ring of the first bearing to the inner side wall of the limiting shell. A first gear is fixedly mounted on the outer sleeve of the first bearing. The first gear is driven by a first motor.

[0010] Preferably, an L-shaped groove is provided on the inner wall of one end of the fixed tube located inside the movable tube, and a rubber gasket is provided in the L-shaped groove. An internal thread section is provided on the inner wall of the movable tube at its middle part, and an external thread section adapted to the internal thread section is provided on the outer wall of the connecting tube of the pipe docking mechanism. A first sealing gasket is provided between the inner ring of the first bearing and the outer wall of the movable tube.

[0011] Preferably, the fixing tube of the locking mechanism on the oil return groove is fixed to and connected to the side wall of the oil return groove, the other end of the movable tube extends into the fixing tube, and the outer wall of the movable tube is provided with a limiting shell with an L-shaped cross section, forming an annular groove with the outer wall of the movable tube. A second bearing is fixedly mounted on the outer sleeve of the fixing tube, one end of the second bearing extends into the annular groove and the outer ring of the second bearing is fixed to the inner side wall of the limiting shell, and a second gear is fixedly mounted on the outer sleeve of the second bearing. The second gear is driven by a second motor.

[0012] Preferably, an annular gasket is provided on the inner wall of one end of the movable tube located inside the fixed tube, and an internal thread section is provided on the inner wall of the movable tube at its middle location. An external thread section adapted to the internal thread section is provided on the outer wall of the connecting tube of the pipe docking mechanism. A second sealing gasket is provided between the end face of the fixed tube and the limiting shell.

[0013] Preferably, the outward-facing end of the movable tube is provided with a funnel-shaped cover, and one side of the funnel-shaped cover is provided with an opening, and the openings of the funnel-shaped covers on the two locking mechanisms face the same direction.

[0014] Preferably, the pipe docking mechanism includes a connecting pipe and a flexible hose connected to the connecting pipe via a pipe joint. The flexible hoses on the two pipe docking mechanisms are respectively connected to the inlet and outlet of the oil filter. A fixed seat is provided at the bottom of the connecting pipe. The fixed seat is connected to the output end of the first telescopic member via a ball joint. A bracket is provided on the trolley. Screw assemblies are respectively provided on the horizontal plate and the vertical plate of the bracket. The first telescopic member is provided on the screw assembly of the horizontal plate, which controls the lifting of the bracket and the lateral movement of the first telescopic member, respectively.

[0015] Preferably, the trolley is mounted on a track, and the top surface of the track has a groove along its length. A baffle is rotatably connected to the groove via a fixed shaft. A torsion spring is sleeved on the fixed shaft. An extension plate is provided on the side wall of the baffle away from the fixed shaft. The extension plate extends out of the groove and is hinged to a second telescopic member. The other end of the second telescopic member is hinged to the track, and the second telescopic member is located on the outward side of the track.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention, by setting up a track-mounted moving trolley, an oil filter, and an automatic pipeline docking mechanism, enables a single filtration system to perform mobile online circulating filtration of quenching oil for multiple multi-purpose furnaces. This significantly reduces equipment investment and floor space requirements, and substantially improves the versatility and utilization rate of the quenching oil filtration system. Simultaneously, the oil circuit design, connecting the auxiliary oil tank, return oil tank, and quenching oil pool, achieves stable oil circulation without slag suction during oil extraction and without liquid agitation during oil return, thereby improving filtration quality and extending the service life of the quenching oil from the source.

[0018] 2. This invention utilizes an automatic locking mechanism combining a fixed pipe and a rotating movable pipe, coupled with a motor-driven gear, to automatically thread and lock the movable pipe and connecting pipe. Combined with a multi-seal structure, this achieves unmanned, automated docking and sealing of inlet and outlet oil pipelines, completely solving the problem of low efficiency associated with manual docking. Furthermore, the funnel-shaped cover and ball-jointed adjustable connecting pipe structure enhance the automatic correction and alignment tolerance capabilities of the pipeline docking, significantly improving the docking success rate and system operational reliability.

[0019] 3. This invention achieves adjustable docking position by setting up a three-dimensional adjustment mechanism composed of a lead screw assembly and a telescopic component, thus enhancing the adaptability of the connecting pipe and the movable pipe. Simultaneously, a limiting mechanism consisting of a flip-up baffle on the track, a torsion spring, and an electromagnet automatically locks the trolley in place, preventing deviation or over-positioning, further ensuring docking safety and equipment operational stability.

[0020] 4. This invention realizes fully automated, unmanned, and efficient operation of the online circulating filtration process of quenching oil. While improving filtration quality and extending oil life, it significantly reduces labor costs and equipment investment, and improves the automation level and production efficiency of the multi-purpose furnace heat treatment production line as a whole. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the connection between the quenching oil tank, auxiliary oil tank, and return oil tank.

[0022] Figure 2 This is a schematic diagram of the locking mechanism and the pipeline connection mechanism;

[0023] Figure 3 for Figure 2 A partial sectional view of the locking mechanism and the pipeline docking mechanism (i.e., a sectional view of the locking mechanism on the auxiliary oil tank).

[0024] Figure 4 This is a cross-sectional view of the locking mechanism on the oil return groove;

[0025] Figure 5 This is a schematic diagram of the movable pipe and connecting pipe;

[0026] Figure 6 This is a schematic diagram of the upper baffle of the guide rail (top view; the lower diagram is the upper diagram after removing the baffle).

[0027] Figure 7 for Figure 6 View AA in the upper middle section;

[0028] In the diagram: 1. Cart; 2. Oil filter; 3. Quenching oil tank; 4. Auxiliary oil tank; 5. Oil tank outlet pipe; 6. Oil return groove; 7. Oil return pipe; 8. Fixed pipe; 9. Movable pipe; 10. Connecting pipe; 11. Limiting shell; 12. First bearing; 13. First gear; 14. First motor; 15. Rubber gasket; 16. First sealing gasket; 17. Second bearing; 18. Second gear; 19. Second motor; 20. Annular gasket; 21. Second sealing gasket; 22. Funnel-shaped cover; 23. Flexible hose; 24. Fixed seat; 25. Ball joint; 26. First telescopic component; 27. Bracket; 28. Screw assembly; 29. ​​Track; 30. Groove; 31. Fixed shaft; 32. Baffle; 33. Torsion spring; 34. Extension plate; 35. Second telescopic component; 36. Electromagnet; 37. Iron sheet; 38. Sleeve-type elastic component. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Unless otherwise specified, the technical means used in the implementation examples are conventional means well known to those skilled in the art.

[0031] refer to Figures 1-7 This invention discloses an online circulating filtration system for quenching oil in multi-purpose furnaces based on a track-mounted trolley. The entire online circulating filtration system is monitored and controlled by a control system. All electrical components involved in the online circulating filtration system are connected to the control system, including but not limited to electrical and signal connections. The online circulating filtration system includes a trolley 1 and an oil filter 2 mounted on the trolley 1. The trolley 1 is mounted on a track 29 and is equipped with a complete and independent controller capable of controlling the trolley to move or stop along the track. This controller receives and executes commands from the control system. The track is laid behind the multi-purpose furnace. When the quenching oil in any multi-purpose furnace meets the filtration conditions (determined by the furnace reaching preset conditions, such as quenching completion and the time since the last oil filtration reaching a preset frequency requirement), a signal is sent to the trolley. The controller on the trolley drives it to move to the rear of the multi-purpose furnace and completes the pipeline connection through a pipeline docking mechanism, ultimately achieving quenching oil filtration. In addition, it should be understood that the number of online circulating filtration systems disclosed in this invention is determined according to the number of multi-purpose furnaces and actual needs. Only one system can be set on the track, or multiple systems can be set.

[0032] Specifically: The trolley 1 is equipped with a pipe docking mechanism, which is automatically connected to the quenching oil tank 3 of the multi-purpose furnace via a locking mechanism. The locking mechanism includes a fixed pipe 8 and a movable pipe 9 rotatably connected to the fixed pipe 8. The movable pipe 9 is threadedly connected to the connecting pipe 10 of the pipe docking mechanism. Then, the oil filter is activated to filter the quenching oil, and the filtered quenching oil is returned to the quenching oil tank.

[0033] Furthermore, the quenching oil tank 3 and the auxiliary oil tank 4 are connected by an oil tank outlet pipe 5, that is, an auxiliary oil tank is set up next to the quenching oil tank. The liquid level in the auxiliary oil tank is stable, and the oil extraction port does not stick to its bottom surface, so as not to suck up bottom sediment, making it safer for the oil filter to draw oil from the auxiliary oil tank. Moreover, the liquid levels of the quenching oil tank 3 and the auxiliary oil tank 4 are the same. As a preferred embodiment, the two ends of the oil tank outlet pipe are respectively connected to the bottom of the quenching oil tank and the auxiliary oil tank, and valves can be installed as needed. The quenching oil tank 3 and the return oil tank 6 are connected by a return oil pipe 7. The bottom of the return oil tank 6 is higher than the liquid level of the quenching oil tank 3. One end of the return oil pipe 7 is located near the bottom of the return oil tank 6, and the other end is located near the upper part of the quenching oil tank 3, extending into the quenching oil tank 3 and with the port of the return oil pipe 7 below the liquid level of the quenching oil tank 3. This allows the filtered quenching oil to flow into the quenching oil tank by gravity, and also avoids impacting the oil in the quenching oil tank and stirring up impurities at the bottom of the quenching oil tank. The auxiliary oil tank 4 and the return oil tank 6 are respectively equipped with locking mechanisms, which are used in conjunction with the pipe docking mechanism to achieve automatic connection.

[0034] Furthermore, the locking mechanism on the auxiliary oil tank 4 is located near its bottom, allowing the quenching oil to be filtered in the auxiliary oil tank to be drawn away by the oil filter, while preventing the removal of impurities settled at the bottom of the auxiliary oil tank; the locking mechanism on the return oil trough 6 is located in the upper part of the return oil trough 6 (e.g., at 1 / 2-2 / 3), preventing oil from spraying outwards. Two pipe connection mechanisms are provided, each connecting to one of the two locking mechanisms.

[0035] It should be noted that in this invention, there are two locking mechanisms, one on the return oil tank and the other on the auxiliary oil tank. Two pipe connection devices are also provided on the trolley, each corresponding to one of the locking mechanisms and completing the connection. When quenching oil needs to be filtered, the trolley moves behind the multi-purpose furnace and adjusts the height of its connecting pipe and the distance between it and the auxiliary oil tank and the return oil tank using the pipe connection devices. After the connecting pipe is aligned with the locking mechanism, the two are fixed in place by the locking mechanism. It is easy to understand that each fixing pipe of the locking mechanism is equipped with a solenoid valve, controlled by the control system. When the pipe is connected, the solenoid valve opens, realizing the filtration and return of the quenching oil. Additionally, it should be noted that since the quenching oil tank is fixed to the ground, the return oil tank and the auxiliary oil tank are arranged close to the track, meaning the locking mechanisms on the return oil tank and the auxiliary oil tank are placed close to the track without any obstruction, so that the pipe connection can be completed more easily when the trolley reaches the designated position. The trolley is identified by a corresponding switch when it reaches a designated position, and then controlled by the controller to stop at the designated position. As one implementation method, for example, the trolley positioning uses existing mature inductive proximity switches in conjunction with metal sensing plates at each workstation: inductive proximity switches are installed on the side of the trolley chassis, and metal sensing plates are fixed to the side wall of the track corresponding to each multi-purpose furnace workstation; when the trolley travels along the track to the target workstation, the proximity switch detects the metal sensing plate and outputs a positioning signal. The controller receives the signal and controls the trolley to brake and stop, thus achieving trolley positioning.

[0036] Furthermore, since the auxiliary oil tank is for oil outlet and the return oil trough is for oil return, to ensure the sealing of the locking mechanism and prevent oil leakage, the locking mechanism components on the auxiliary oil tank and the return oil trough are the same, but the arrangement differs, as follows:

[0037] like Figure 3As shown, the fixing pipe 8 of the locking mechanism on the auxiliary oil tank 4 is fixed to and connected to the side wall of the auxiliary oil tank 4. The other end of the fixing pipe 8 extends into the movable pipe 9, so that when the quenching oil flows from the fixing pipe to the movable pipe, the quenching oil is prevented from entering the gap between the movable pipe and the fixing pipe. The outer wall of the movable pipe 9 is provided with a limiting shell 11 with an L-shaped cross section. The opening of the limiting shell faces the fixing pipe and forms an annular groove with the outer wall of the movable pipe 9. The fixing pipe 8 is fitted with a first bearing 12. One end of the first bearing 12 extends into the annular groove and fixes the outer ring of the first bearing 12 to the inner side wall of the limiting shell 11, so that when the outer ring of the first bearing rotates, it rotates together with the limiting shell and the movable pipe. Because of the difference in outer diameter between the fixed tube and the movable tube, a fixing sleeve is fitted onto the outer wall of the fixed tube to facilitate the installation of the first gear. The thickness of the fixing sleeve is slightly greater than that of the movable tube, so that when the first bearing is fitted onto the fixing sleeve, there is a gap between the outer wall of the movable tube and the inner ring of the first bearing, preventing friction between the movable tube and the inner ring of the first bearing when the movable tube rotates. A first gear 13 is fitted onto the outer sleeve of the first bearing 12. The first gear 13 is driven by a first motor 14, meaning that the output end of the first motor has a drive gear that meshes with the first gear. The location of the first motor can be determined according to actual conditions; it can be placed on the side wall of the auxiliary oil tank, on the outer wall of the fixed tube, or on other support plates for placing the first motor.

[0038] Furthermore, to prevent oil leakage, an L-shaped groove is provided on the inner wall of one end of the fixed pipe 8 located inside the movable pipe 9, and a rubber gasket 15 is provided in the L-shaped groove. An internal thread section is provided on the inner wall of the movable pipe 9 at its middle position, and an external thread section adapted to the internal thread section is provided on the outer wall of the connecting pipe 10 of the pipe docking mechanism. The lengths of the internal and external thread sections can be set according to the actual situation. A first sealing gasket 16 is provided between the inner ring of the first bearing 12 and the outer wall of the movable pipe 9. It should be noted that when the connecting pipe is inserted into the movable pipe, the movable pipe is rotated by driving the first gear, so that the movable pipe and the connecting pipe are fixed by thread connection until the end of the connecting pipe abuts against the rubber gasket 15. It is important to note that the rotational speed of the movable tube is coordinated with the travel speed of the connecting tube towards the fixed tube. The travel speed of the fixed tube is controlled by a lead screw assembly on the horizontal plate. This ensures that as the movable tube rotates, the connecting tube moves linearly, completing the threaded connection between the movable and connecting tubes until the end of the connecting tube abuts against the rubber washer 15, at which point the connection is complete and the movable tube stops rotating. This can be understood as the movable tube rotating, coordinating with the lead screw assembly to control the feed speed of the connecting tube, achieving the threaded connection between the movable and connecting tubes. During this process, the feed speed of the lead screw assembly on the horizontal plate is equal to the thread feed speed. Therefore, the motor on the lead screw assembly is preferably a servo motor. For example, when the rotational speed of the movable tube is 1 r / s, the feed speed, corresponding to the pitch of the internal thread section, is rotational speed × pitch; when the lead of the lead screw on the lead screw assembly is 5 mm, the rotational speed of the servo motor is feed speed ÷ lead × movable tube rotational speed.

[0039] like Figure 4 As shown, the fixing pipe 8 of the locking mechanism on the oil return groove 6 is fixed to and connected to the side wall of the oil return groove 6. The other end of the movable pipe 9 extends into the fixing pipe 8. A limiting shell 11 with an L-shaped cross-section is provided on the outer wall of the movable pipe 9, forming an annular groove with the outer wall of the movable pipe 9. A second bearing 17 is fixedly fitted onto the fixing pipe 8. One end of the second bearing 17 extends into the annular groove and the outer ring of the second bearing 17 is fixed to the inner side wall of the limiting shell 11. A second gear 18 is fixedly fitted onto the second bearing 17. The second gear 18 is driven by a second motor 19. It should be noted that: except for the difference in the setting position of the movable pipe and the fixing pipe (due to the difference in position, the second bearing can be directly fitted and fixed outside the fixing pipe without the need for a fixing sleeve), the rest of the structure is the same as the previous one. Figure 3 The disclosed locking mechanisms are basically the same.

[0040] Furthermore, an annular gasket 20 is provided on the inner wall of the end of the movable tube 9 located inside the fixed tube 8. An internal thread section is provided on the inner wall of the movable tube 9, located in its middle. An external thread section adapted to the internal thread section is provided on the outer wall of the connecting tube 10 of the pipe docking mechanism. A second sealing gasket 21 is provided between the end face of the fixed tube 8 and the limiting shell 11. It should be noted that the annular gasket functions similarly to the L-shaped groove, primarily to restrict the connecting tube and prevent it from continuously moving towards the fixed tube. When the movable tube rotates and connects with the connecting tube via a thread, the movable tube stops rotating when the opening of the connecting tube abuts against the annular gasket. The second sealing gasket functions similarly to the first sealing gasket, and its position varies depending on the arrangement of the movable and fixed tubes. Figure 4 As shown, the second sealing gasket is disposed between the port of the fixed tube and the limiting shell. It should also be noted that the first and second sealing gaskets are not directly fitted onto the ports of the movable and fixed tubes, but rather corresponding to the ports of the movable and fixed tubes and the inner wall of the limiting shell, with grooves provided therein, so that the first and second sealing gaskets are located within the grooves.

[0041] Furthermore, a funnel-shaped cover 22 is provided at the outward end of the movable tube 9. An opening is provided on one side of the funnel-shaped cover 22. The openings of the funnel-shaped covers 22 on the two locking mechanisms face the same direction. When the connecting tube cannot be coaxially aligned with the movable tube as much as possible and there is a certain deviation, the funnel-shaped cover 22 can help the connecting tube move towards the inside of the movable tube.

[0042] Furthermore, the pipe docking mechanism includes a connecting pipe 10 and a flexible hose 23 connected to the connecting pipe 10 via a pipe joint. The flexible hoses 23 on the two pipe docking mechanisms are respectively connected to the inlet and outlet of the oil filter 2. A fixed seat 24 is provided at the bottom of the connecting pipe 10. The fixed seat 24 is connected to the output end of the first telescopic member 26 via a ball joint 25. A bracket 27 is provided on the trolley 1. The bracket is 7-shaped and faces the quenching oil tank. A screw assembly 28 is provided on the horizontal and vertical plates of the bracket 27. The first telescopic member 26 is provided on the screw assembly 28 on the horizontal plate, which controls the lifting of the bracket 27 and the lateral movement of the first telescopic member 26. It should be noted that the screw assembly is existing technology and mainly includes a screw, a nut, and a motor. Since the funnel-shaped cover can correct the position of the connecting pipe within a certain range, the first telescopic member and the connecting pipe cannot be fixedly connected, but can rotate at different angles within a certain range. Therefore, the connecting pipe and the first telescopic member are connected by a ball joint. Additionally, a level can be installed on the connecting pipe as needed to monitor its tilt at any time. When the tilt angle of the connecting pipe exceeds the range of the funnel-shaped cover, a signal is sent to the control system to remind the staff to perform maintenance. The first telescopic component includes, but is not limited to, electric push rods and hydraulic push rods.

[0043] Furthermore, after the quenching oil is filtered, the movable pipe and the connecting pipe can be separated by reversing the screw assembly and the first and second motors. As one option, an oil collection tray can be installed below the movable pipe and the connecting pipe, covering the separation area of ​​the connecting pipe and the movable pipe, to collect the quenching oil that may drip during the separation of the two pipes, preventing it from dripping onto the ground and causing environmental pollution in the long run.

[0044] Furthermore, to ensure the stability of the connecting pipe, sleeve-type elastic elements 38 (existing technology, mainly composed of two interlocking sleeves connected by springs) are evenly arranged between the fixed base 24 and the output rod of the first telescopic member. Preferably, there are four sleeve-type elastic elements. The two ends of the sleeve-type elastic elements are hinged to the fixed base and the output rod of the first telescopic member, respectively, such as through the cooperation of lifting rings. In the static state, the connecting pipe remains horizontal. When the connecting pipe tilts under the action of external force (such as the connecting pipe colliding with other equipment on site), the connecting pipe can quickly return to its original position under the action of the sleeve-type elastic elements.

[0045] Furthermore, to prevent accidents where the trolley fails to stop at the designated position on the track, a device is installed on the track to prevent the trolley from moving. Specifically, a groove 30 is provided on the top surface of the track 29 along its length. A baffle 32 is rotatably connected to the groove 30 via a fixed shaft 31. When the baffle is upright under the action of the fixed shaft, its top surface corresponds to the trolley, causing the trolley's wheels to contact the baffle, thereby preventing the trolley from continuing to move. Of course, if the trolley fails to reach the designated position, rather than exceeding it, a contact sensor can be installed on the surface of the baffle. When the trolley's wheels contact the sensor, the contact sensor sends a signal to the controller on the trolley, which immediately stops the trolley. Conversely, if the contact sensor does not receive a signal and the trolley is stopped, the controller controls the trolley to move until it receives a signal from the contact sensor.

[0046] Furthermore, a torsion spring 33 is sleeved on the fixed shaft 31, and an extension plate 34 is provided on the side wall of the end of the baffle 32 away from the fixed shaft 31. The extension plate 34 extends out of the groove 30 and is hinged to a second telescopic member 35. The other end of the second telescopic member 35 is hinged to the track 29. For example, a guide post is vertically arranged on the outside of the track, and a rotating cylinder is sleeved on the guide post. The cylinder end of the second telescopic member is fixed on the rotating cylinder. The second telescopic member 35 is located on the outward side of the track 29. It should be noted that the second telescopic member includes, but is not limited to, an electric push rod and a hydraulic push rod. The torsion spring is provided to assist the second telescopic member and prevent it from failing to lift the baffle smoothly. At the same time, in order to ensure that the baffle can be smoothly reset after being upright, an electromagnet 36 is provided in the groove, and a patch is provided on the bottom surface of the baffle at the position corresponding to the electromagnet, so as to cooperate with the second telescopic member and the electromagnet to achieve adsorption and fixation of the baffle. The electromagnet is located away from the fixed shaft. If the material of the baffle itself can be attracted by an internal electromagnet, then there is no need to install an iron plate.

[0047] When using this invention, the control system determines whether the quenching oil in the multi-purpose furnace has reached the filtration conditions and sends a signal to the trolley, which then moves to the rear of the furnace. Once the trolley reaches the designated position, the height of the first telescopic component and its distance from the auxiliary oil tank and return oil trough are adjusted via the screw assembly (this can be pre-adjusted; based on the heights of the auxiliary oil tank and return oil trough, the screw assembly on the support vertical plate, in conjunction with the first telescopic component, adjusts the height of the connecting pipe to match the height of the movable pipe; if conditions permit, the distance between the first telescopic component and the auxiliary oil tank and return oil trough can also be pre-adjusted). After adjustment, the controller detects the distance between the movable pipe or funnel-shaped cover and the connecting pipe (this can be achieved by installing a laser displacement sensor, for example, by installing a laser displacement sensor on a fixed base with the transmitting end aligned with the end face of the funnel-shaped cover), and starts the first and second motors and the screw assembly on the support horizontal plate, thereby completing the threaded connection between the movable pipe and the connecting pipe. After connection, the solenoid valve on the fixed pipe is opened, starting the oil filter for oil filtration. When the preset time is reached or the quenching oil tank is not ready for oil filtration, the filter empties the oil from the pipeline and stops, retracting the pipeline (the movable pipe and connecting pipe are separated by the screw assembly and the first and second motors reversing; as one option, an oil collection tray can be installed below the movable and connecting pipes, covering the separation area, to collect any quenching oil that may drip during the separation process, preventing it from falling onto the ground and causing environmental pollution over time). The control system waits for the next multi-purpose furnace to be ready for oil filtration before moving to its successor, and this cycle continues.

[0048] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0049] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-purpose furnace quenching oil online circulation filtration system based on a track-moving trolley, comprising a trolley (1) and an oil filter (2) disposed on the trolley (1), characterized in that: The trolley (1) is equipped with a pipe docking mechanism. The pipe docking mechanism is automatically connected to the quenching oil tank (3) of the multi-purpose furnace through a locking mechanism. The locking mechanism includes a fixed pipe (8) and a movable pipe (9) rotatably connected to the fixed pipe (8). The movable pipe (9) is connected to the connecting pipe (10) of the pipe docking mechanism through a thread.

2. The online circulating filtration system for multi-purpose furnace quenching oil based on a track-moving trolley according to claim 1, characterized in that: The quenching oil tank (3) and the auxiliary oil tank (4) are connected by an oil tank outlet pipe (5), and the liquid levels of the quenching oil tank (3) and the auxiliary oil tank (4) are the same; the quenching oil tank (3) and the return oil tank (6) are connected by a return oil pipe (7), the bottom of the return oil tank (6) is higher than the liquid level of the quenching oil tank (3), one end of the return oil pipe (7) is located near the bottom of the return oil tank (6), and the other end is located near the upper part of the quenching oil tank (3), and extends into the quenching oil tank (3) so that the port of the return oil pipe (7) is below the liquid surface of the quenching oil tank (3); the auxiliary oil tank (4) and the return oil tank (6) are respectively provided with locking mechanisms.

3. The multi-purpose furnace quenching oil online circulation filtration system based on a track-moving trolley according to claim 2, characterized in that: The locking mechanism on the auxiliary oil tank (4) is located near the bottom of the auxiliary oil tank (4), and the locking mechanism on the return oil trough (6) is located in the upper part of the return oil trough (6). There are two pipe docking mechanisms, which are respectively connected to the two locking mechanisms.

4. A multi-purpose furnace quenching oil online circulation filtration system based on a track-moving trolley according to claim 2 or 3, characterized in that: The fixing tube (8) of the locking mechanism on the auxiliary oil tank (4) is fixed to the side wall of the auxiliary oil tank (4) and connected. The other end of the fixing tube (8) extends into the movable tube (9). The outer wall of the movable tube (9) is provided with a limiting shell (11) with an L-shaped cross section, which forms an annular groove with the outer wall of the movable tube (9). The fixing tube (8) is fitted with a first bearing (12). One end of the first bearing (12) extends into the annular groove and fixes the outer ring of the first bearing (12) to the inner side wall of the limiting shell (11). The first bearing (12) is fitted with a first gear (13). The first gear (13) is driven by a first motor (14).

5. The online circulating filtration system for multi-purpose furnace quenching oil based on a track-moving trolley according to claim 4, characterized in that: The fixed tube (8) has an L-shaped groove on the inner wall of one end inside the movable tube (9), and a rubber gasket (15) is provided in the L-shaped groove. An internal thread section is provided on the inner wall of the movable tube (9) at its middle part. An external thread section that matches the internal thread section is provided on the outer wall of the connecting tube (10) of the pipe docking mechanism. A first sealing gasket (16) is provided between the inner ring of the first bearing (12) and the outer wall of the movable tube (9).

6. A multi-purpose furnace quenching oil online circulation filtration system based on a track-moving trolley according to claim 2 or 3, characterized in that: The locking mechanism of the oil return groove (6) is fixed to the side wall of the oil return groove (6) and connected. The other end of the movable tube (9) extends into the fixed tube (8). The outer wall of the movable tube (9) is provided with a limiting shell (11) with an L-shaped cross section, which forms an annular groove with the outer wall of the movable tube (9). The fixed tube (8) is fitted with a second bearing (17). One end of the second bearing (17) extends into the annular groove and fixes the outer ring of the second bearing (17) to the inner side wall of the limiting shell (11). The second bearing (17) is fitted with a second gear (18). The second gear (18) is driven by a second motor (19).

7. The online circulating filtration system for multi-purpose furnace quenching oil based on a track-moving trolley according to claim 6, characterized in that: An annular gasket (20) is provided on the inner wall of one end of the movable tube (9) located inside the fixed tube (8). An internal thread section is provided on the inner wall of the movable tube (9) located in the middle. An external thread section adapted to the internal thread section is provided on the outer wall of the connecting tube (10) of the pipe docking mechanism. A second sealing gasket (21) is provided between the end face of the fixed tube (8) and the limiting shell (11).

8. The online circulating filtration system for multi-purpose furnace quenching oil based on a track-moving trolley according to claim 3, characterized in that: The outward end of the movable tube (9) is provided with a funnel-shaped cover (22), and an opening is provided on one side of the funnel-shaped cover (22). The openings of the funnel-shaped covers (22) on the two locking mechanisms face the same direction.

9. A multi-purpose furnace quenching oil online circulation filtration system based on a track-moving trolley according to claim 3 or 8, characterized in that: The pipe docking mechanism includes a connecting pipe (10) and a flexible hose (23) connected to the connecting pipe (10) through a pipe joint. The flexible hoses (23) on the two pipe docking mechanisms are respectively connected to the inlet and outlet of the oil filter (2). A fixed seat (24) is provided at the bottom of the connecting pipe (10). The fixed seat (24) is connected to the output end of the first telescopic member (26) through a ball joint (25). A bracket (27) is provided on the trolley (1). A screw assembly (28) is provided on the horizontal plate and the vertical plate of the bracket (27). The first telescopic member (26) is provided on the screw assembly (28) on the horizontal plate, which controls the lifting of the bracket (27) and the lateral movement of the first telescopic member (26).

10. The online circulating filtration system for multi-purpose furnace quenching oil based on a track-moving trolley according to claim 1, characterized in that: The trolley (1) is set on the track (29). The top surface of the track (29) is provided with a groove (30) along its length. A baffle (32) is rotatably connected in the groove (30) through a fixed shaft (31). A torsion spring (33) is sleeved on the fixed shaft (31). An extension plate (34) is provided on the side wall of the baffle (32) away from the fixed shaft (31). The extension plate (34) extends out of the groove (30) and is hinged to a second telescopic member (35). The other end of the second telescopic member (35) is hinged to the track (29). The second telescopic member (35) is located on the outward side of the track (29).

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