Automatic oil injection lubricating device of a tensioner

Abstract

The application provides an automatic oil injection lubricating device of a pipe expander, and relates to the technical field of pipe expanders. The automatic oil injection lubricating device comprises a push rod, an oil conveying expander rod and an oil distributor. The oil conveying expander rod is connected to one end of the push rod, and one end of the oil conveying expander rod is connected with an adapter rod. A expander head is mounted on one end of the adapter rod through a bolt. A first oil conveying groove is arranged in the oil conveying expander rod. A second oil conveying groove is arranged on the inner side of the adapter rod. A third oil conveying groove is arranged in the bolt. The first oil conveying groove, the second oil conveying groove and the third oil conveying groove are communicated. The push rod pushes the oil conveying expander rod, so that the adapter rod and the expander head move and are inserted into a copper pipe for pipe expansion. The oil feeding assembly can supply oil to the oil inlet channel. The oil enters the slide channel. Due to the action of the sealing parts at both ends, the oil enters the first oil conveying groove, the second oil conveying groove and the third oil conveying groove from the oil inlet hole, and is injected into the copper pipe from the bolt for lubrication. Manual oil feeding is not needed, safety hazards are avoided, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of suspension expansion machine technology, and in particular to an automatic oil injection lubrication device for suspension expansion machines. Background Technology

[0002] A heat exchanger mainly consists of metal heat exchange tubes and fins. The fins are fitted onto the heat exchange tubes, which perform the function of heat exchange, while the fins perform the function of heat dissipation. During the production process of a heat exchanger, the metal heat exchange tubes and the fins fitted onto them need to be tightly combined to ensure good heat transfer and conduction. Moreover, the heat exchanger is lightweight and has a long service life. During the assembly process of the fins and copper tubes, the inner diameter of the copper tubes needs to be enlarged using a tube expander. This increases the outer diameter of the copper tubes, allowing the fins to be fixed onto the copper tubes. At the same time, it also increases the closeness between the copper tubes and the fins, thereby improving the heat exchange rate of the heat exchanger. Because the expansion of the inner wall of the copper tube by the tube expander is accomplished by expanding the expansion ball which is larger than the inner hole of the copper tube, a lubricant is needed in this process to improve efficiency and product quality. However, the tube expander does not have an automatic oil spraying function, and each copper tube opening needs to be manually dripped before operation, which is neither efficient nor safe. Therefore, this invention proposes an automatic oil spraying lubrication device for the tube expander to solve the problems existing in the prior art. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes an automatic oil spraying and lubrication device for a tube expander. This device eliminates the need for manual oiling, avoids safety hazards, improves work efficiency, and automatically sprays oil during tube expansion, eliminating the need for processing time, thus ensuring product quality and equipment lifespan, and reducing wear.

[0004] To achieve the objectives of this invention, the following technical solution is provided: an automatic oil injection lubrication device for a lifting expansion machine, comprising a push rod, an oil-transmitting expansion rod, and an oil distributor. The oil-transmitting expansion rod is connected to one end of the push rod, and a connecting rod is connected to one end of the oil-transmitting expansion rod. An expansion head is installed at one end of the connecting rod via a bolt. The oil-transmitting expansion rod has a first oil-transmitting groove inside, the connecting rod has a second oil-transmitting groove inside, and the bolt has a third oil-transmitting groove inside. The first, second, and third oil-transmitting grooves are connected. The oil distributor has a slide rail inside, and the oil-transmitting expansion rod moves through the slide rail. Both ends of the slide rail are provided with sealing portions. The oil conveying expansion rod is provided with an oil inlet hole at the slide, and the oil inlet hole is connected to the slide and the first oil conveying groove. The oil distributor is provided with an oil inlet channel, and the oil inlet channel is connected to the oil inlet hole. The oil inlet channel is used to connect to the oil supply component.

[0005] A further improvement is that: a mounting screw groove is provided at the center of one end of the push rod and one end of the oil conveying expansion rod, and the mounting screw grooves at both ends are connected by a screw rod, and the edges of one end of the push rod and one end of the oil conveying expansion rod are connected by argon arc welding.

[0006] A further improvement is that the oil-transfer expansion rod has a first threaded groove at the end away from the push rod, and the adapter rod has a threaded head at the end away from the bolt, with the first threaded groove and the threaded head being compatible.

[0007] A further improvement is that the adapter rod has a second threaded groove at the end away from the screw head, and the bolt is adapted to the second threaded groove.

[0008] A further improvement is that the sealing part includes an oil seal and a sealing ring, the oil seal is installed at both ends of the slide, the sealing ring is located at both ends inside the slide, and the oil conveying expansion rod moves through the oil seal and the sealing ring.

[0009] A further improvement is that the oil supply assembly includes an oil conduit and an oil tank. The oil conduit is connected to the oil inlet channel, and the input end of the oil conduit is connected to a liquid pump. The input end of the liquid pump is connected to the oil tank. A solenoid valve is provided on the oil conduit.

[0010] A further improvement is that: the oil separator has at least four sets of slides inside, and the four sets of slides are used for the passage of four sets of oil conveying expansion rods. The oil inlet channel has two sets, left and right, and the bottom of each set of oil inlet channels is provided with guide grooves. The two sets of guide grooves on both sides are respectively connected to the two sets of slides on both sides.

[0011] A further improvement is that the oil separator is fixed inside the expansion machine frame, the push rod is movably located inside the expansion machine frame, and the expansion head extends out of one end of the expansion machine frame.

[0012] A further improvement is that an oil receiving tray is provided at one end inside the expansion machine frame, and the oil receiving tray is located below the oil distributor.

[0013] A further improvement is that the diameter of the first oil delivery tank is larger than the diameter of the second oil delivery tank, and the diameter of the second oil delivery tank is larger than the diameter of the third oil delivery tank.

[0014] The beneficial effects of this invention are as follows: 1. This invention uses a push rod to push the oil expansion rod, causing the adapter rod and expansion head to move and extend into the copper tube for expansion. Oil is supplied to the inlet channel via the oil supply assembly, and the oil enters the slide. Due to the sealing at both ends, the oil enters the first, second, and third oil channels from the inlet hole, and is sprayed into the copper tube from the bolt for lubrication. This eliminates the need for manual oiling, avoids safety hazards, and improves work efficiency. Automatic oil spraying during tube expansion eliminates the need for processing time, ensuring product quality and equipment lifespan, and reducing wear.

[0015] 2. In this invention, the oil conveying expansion rod is connected to the push rod by welding with a screw, which facilitates the processing of a single section of the oil conveying expansion rod. It is more convenient to connect the expansion head and the oil conveying expansion rod through the structure of the adapter rod with the screw groove and screw head, which is convenient for disassembly. When wear occurs, only the adapter rod needs to be treated, and there is no need to treat the oil conveying expansion rod, thus reducing maintenance costs.

[0016] 3. The present invention has an oil receiving tray located below the oil separator to collect any leaked oil and facilitate its recycling. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention; Figure 2 This is a partial schematic diagram of the oil separator of the present invention; Figure 3 This is a cross-sectional schematic diagram of the oil separator of the present invention; Figure 4 This is a schematic cross-sectional view of the oil separator end face of the present invention.

[0018] The components are: 1. Push rod; 2. Oil conveying expansion rod; 3. Oil distributor; 4. Adapter rod; 5. Bolt; 6. Expansion head; 7. First oil conveying groove; 8. Second oil conveying groove; 9. Third oil conveying groove; 10. Slide rail; 11. Oil inlet hole; 12. Oil inlet channel; 13. Screw; 14. First screw groove; 15. Screw head; 16. Second screw groove; 17. Oil seal; 18. Sealing ring; 19. Guide groove; 20. Expansion machine frame; 21. Oil receiving tray. Detailed Implementation

[0019] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. Example 1

[0020] according to Figure 1 , 2 As shown in Figures 3 and 4, this embodiment proposes an automatic oil injection lubrication device for a lifting expansion machine, including a push rod 1, an oil-transmitting expansion rod 2, and an oil distributor 3. The oil-transmitting expansion rod 2 is connected to one end of the push rod 1, and one end of the oil-transmitting expansion rod 2 is connected to an adapter rod 4. One end of the adapter rod 4 is fitted with an expansion head 6 via a bolt 5. The oil-transmitting expansion rod 2 has a first oil-transmitting groove 7 inside, the adapter rod 4 has a second oil-transmitting groove 8 inside, and the bolt 5 has a third oil-transmitting groove 9 inside. The first oil-transmitting groove 7, the second oil-transmitting groove 8, and the third oil-transmitting groove 9 are connected. The oil distributor 3 has a slide 10 inside, and the oil-transmitting expansion rod 2 moves through the slide 10. Both ends of the slide 10 are provided with sealing parts. The oil-supplying expansion rod 2 has an oil inlet hole 11 located at the slide rail 10, and the oil inlet hole 11 connects the slide rail 10 and the first oil supply groove 7. The oil distributor 3 has an oil inlet channel 12, and the oil inlet channel 12 connects to the oil inlet hole 11. The oil inlet channel 12 is used to connect to the oil supply assembly. In use, the oil-supplying expansion rod 2 is pushed by the push rod 1, which causes the adapter rod 4 and the expansion head 6 to move and extend into the copper tube for tube expansion. The oil supply assembly can supply oil to the oil inlet channel 12. The oil enters the slide rail 10. Due to the effect of the sealing parts at both ends, the oil enters the first oil supply groove 7, the second oil supply groove 8 and the third oil supply groove 9 from the oil inlet hole 11, and is sprayed into the copper tube from the bolt 5 for lubrication. No manual oiling is required, avoiding safety hazards and improving work efficiency. Oil is automatically sprayed during tube expansion. A φ3 hole is made through a φ10 oil-transferring expansion rod 2, which is 1 meter long, to form the first oil-transferring groove 7. A φ2 hole is made through the inside of the adapter rod to form the second oil-transferring groove 8. The bolt 5 at the head is modified to add a φ1.5 oil injection inner hole, which is the third oil-transferring groove 9. A signal is written into the program so that when the oil-transferring expansion rod 2 starts to work, the oil injection function is activated for the first 2 seconds. The volatile lubricating oil can be sprayed into the copper pipe through the oil-transferring groove under the action of the oil supply component to achieve the lubrication effect.

[0021] Both the push rod 1 and the oil-transfer expansion rod 2 have mounting screw grooves at their center positions, and these mounting screw grooves are connected by a screw 13. The edges of the push rod 1 and the oil-transfer expansion rod 2 are connected by argon arc welding. The end of the oil-transfer expansion rod 2 away from the push rod 1 has a first screw groove 14, and the end of the adapter rod 4 away from the bolt 5 has a screw head 15, which is compatible with the first screw groove 14. The end of the adapter rod 4 away from the screw head 15 has a second screw groove 16, which is compatible with the bolt 5. Connecting the oil-transfer expansion rod 2 to the push rod 1 by welding with the screw 13 facilitates the processing of a single section of the oil-transfer expansion rod 2, making it more convenient. Connecting the expansion head 6 and the oil-transfer expansion rod 2 through the structure of the adapter rod 4 with the screw groove and screw head 15 facilitates disassembly. When wear occurs, only the adapter rod 4 needs to be processed, without needing to process the oil-transfer expansion rod 2, thus reducing maintenance costs.

[0022] The sealing part includes an oil seal 17 and a sealing ring 18. The oil seal 17 is installed at both ends of the slide rail 10, and the sealing ring 18 is located at both ends inside the slide rail 10. The oil conveying expansion rod 2 moves through the oil seal 17 and the sealing ring 18. Through the action of the oil seal 17 and the sealing ring 18, the sealing at both ends of the slide rail 10 is ensured, and oil leakage is prevented during the movement of the oil conveying expansion rod 2.

[0023] The oil supply assembly includes an oil conduit and an oil tank. The oil conduit is connected to the oil inlet 12, and its input end is connected to a hydraulic pump. The input end of the hydraulic pump is connected to the oil tank. A solenoid valve is installed on the oil conduit. The hydraulic pump provides pressure to the lubricating oil to ensure the spraying effect. The 4-liter oil tank meets the design requirements, as the lubricating oil consumption for 5 normal working days is 3.0 to 3.5 liters.

[0024] The oil distributor 3 has four sets of slides 10 inside, which are used for the passage of four sets of oil conveying expansion rods 2. The oil inlet channel 12 has two sets, left and right, and each set of oil inlet channels 12 has a guide groove 19 below it. The two sets of guide grooves 19 on both sides are connected to the two sets of slides 10 on both sides. In use, oil is supplied to the oil inlet channel 12 through the oil supply assembly, and the oil is transported to the guide groove 19 and simultaneously enters the four sets of slides 10, supplying oil to the four oil conveying expansion rods 2 at the same time.

[0025] The diameter of the first oil delivery tank 7 is larger than the diameter of the second oil delivery tank 8, and the diameter of the second oil delivery tank 8 is larger than the diameter of the third oil delivery tank 9. The diameter gradually decreases to increase the pressure on the oil and facilitate oil injection. Example 2

[0026] according to Figure 1 , 2 As shown in Figures 3 and 4, this embodiment proposes an automatic oil injection lubrication device for a lifting expansion machine, including a push rod 1, an oil-transmitting expansion rod 2, and an oil distributor 3. The oil-transmitting expansion rod 2 is connected to one end of the push rod 1, and one end of the oil-transmitting expansion rod 2 is connected to an adapter rod 4. One end of the adapter rod 4 is fitted with an expansion head 6 via a bolt 5. The oil-transmitting expansion rod 2 has a first oil-transmitting groove 7 inside, the adapter rod 4 has a second oil-transmitting groove 8 inside, and the bolt 5 has a third oil-transmitting groove 9 inside. The first oil-transmitting groove 7, the second oil-transmitting groove 8, and the third oil-transmitting groove 9 are connected. The oil distributor 3 has a slide 10 inside, and the oil-transmitting expansion rod 2 moves through the slide 10. Both ends of the slide 10 are provided with sealing parts. The oil-supplying expansion rod 2 has an oil inlet hole 11 located at the slide rail 10, and the oil inlet hole 11 connects the slide rail 10 and the first oil supply groove 7. The oil distributor 3 has an oil inlet channel 12, and the oil inlet channel 12 connects to the oil inlet hole 11. The oil inlet channel 12 is used to connect to the oil supply assembly. In use, the oil-supplying expansion rod 2 is pushed by the push rod 1, which causes the adapter rod 4 and the expansion head 6 to move and extend into the copper tube for tube expansion. The oil supply assembly can supply oil to the oil inlet channel 12. The oil enters the slide rail 10. Due to the effect of the sealing parts at both ends, the oil enters the first oil supply groove 7, the second oil supply groove 8 and the third oil supply groove 9 from the oil inlet hole 11, and is sprayed into the copper tube from the bolt 5 for lubrication. No manual oiling is required, avoiding safety hazards and improving work efficiency. Oil is automatically sprayed during tube expansion. A φ3 hole is made through a φ10 oil-transferring expansion rod 2, which is 1 meter long, to form the first oil-transferring groove 7. A φ2 hole is made through the inside of the adapter rod to form the second oil-transferring groove 8. The bolt 5 at the head is modified to add a φ1.5 oil injection inner hole, which is the third oil-transferring groove 9. A signal is written into the program so that when the oil-transferring expansion rod 2 starts to work, the oil injection function is activated for the first 2 seconds. The volatile lubricating oil can be sprayed into the copper pipe through the oil-transferring groove under the action of the oil supply component to achieve the lubrication effect.

[0027] The oil separator 3 is fixed inside the expansion machine frame 20, the push rod 1 is movably disposed inside the expansion machine frame 20, and the expansion head 6 extends out of one end of the expansion machine frame 20. An oil receiving tray 21 is provided at one end inside the expansion machine frame 20, and the oil receiving tray 21 is located below the oil separator 3. The oil receiving tray 21 located below the oil separator 3 is used to collect any leaked oil for easy recycling.

[0028] The diameter of the first oil delivery tank 7 is larger than the diameter of the second oil delivery tank 8, and the diameter of the second oil delivery tank 8 is larger than the diameter of the third oil delivery tank 9. The diameter gradually decreases to increase the pressure on the oil and facilitate oil injection.

[0029] The automatic oil spraying and lubrication device of this expansion machine pushes the oil-conveying expansion rod 2 through the push rod 1, causing the adapter rod 4 and the expansion head 6 to move and extend into the copper tube for tube expansion. Oil is supplied to the oil inlet channel 12 through the oil supply assembly, and the oil enters the slide rail 10. Due to the sealing at both ends, the oil enters the first oil delivery groove 7, the second oil delivery groove 8, and the third oil delivery groove 9 from the oil inlet hole 11, and is sprayed into the copper tube from the bolt 5 for lubrication. This eliminates the need for manual oiling, avoids safety hazards, and improves work efficiency. Automatic oil spraying during tube expansion eliminates processing time, ensuring product quality and equipment lifespan, and reducing wear. Furthermore, this invention connects the oil-conveying expansion rod 2 to the push rod 1 via a screw 13 and welding, facilitating the processing of individual sections of the expansion rod 2. The adapter rod 4, in conjunction with the screw groove and screw head 15, connects the expansion head 6 and the oil-conveying expansion rod 2, facilitating disassembly. In case of wear, only the adapter rod 4 needs to be processed, eliminating the need to process the oil-conveying expansion rod 2, thus reducing maintenance costs. Meanwhile, the present invention has an oil receiving tray 21 located below the oil separator 3 to collect any leaked oil and facilitate its recycling.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic oil injection lubrication device for a lifting expansion machine, comprising a push rod (1), an oil conveying expansion rod (2), and an oil distributor (3), characterized in that: The oil conveying expansion rod (2) is connected to one end of the push rod (1), and one end of the oil conveying expansion rod (2) is connected to the adapter rod (4). One end of the adapter rod (4) is fitted with an expansion head (6) by a bolt (5). The oil conveying expansion rod (2) has a first oil conveying groove (7) inside. The adapter rod (4) has a second oil conveying groove (8) inside. The bolt (5) has a third oil conveying groove (9) inside. The first oil conveying groove (7), the second oil conveying groove (8) and the third oil conveying groove (9) are connected. The oil separator (3) has a slide (10) inside. The oil conveying expansion rod (2) moves through the slide (10), and both ends of the slide (10) are provided with sealing parts. The oil conveying expansion bar (2) is provided with an oil inlet hole (11) at the slide (10), and the oil inlet hole (11) connects the slide (10) and the first oil conveying groove (7). The oil distributor (3) is provided with an oil inlet channel (12), and the oil inlet channel (12) connects to the oil inlet hole (11). The oil inlet channel (12) is used to connect to the oil supply assembly. The push rod (1) and the oil expansion rod (2) are both provided with mounting screw grooves at their center positions, and the mounting screw grooves at both ends are connected by a screw (13). The edges of the push rod (1) and the oil expansion rod (2) are connected by argon arc welding. The oil expansion rod (2) is provided with a first screw groove (14) at the end away from the push rod (1), and the adapter rod (4) is provided with a screw head (15) at the end away from the bolt (5). The first screw groove (14) and the screw head (15) are compatible. The adapter rod (4) is provided with a second screw groove (16) at the end away from the screw head (15). The bolt (5) is compatible with the second screw groove (16).

2. The automatic oil injection lubrication device for a lifting machine according to claim 1, characterized in that: The sealing part includes an oil seal (17) and a sealing ring (18). The oil seal (17) is installed at both ends of the slide (10), and the sealing ring (18) is located at both ends inside the slide (10). The oil conveying expansion rod (2) moves through the oil seal (17) and the sealing ring (18).

3. The automatic oil injection lubrication device for a suspension expander according to claim 2, characterized in that: The oil supply assembly includes an oil conduit and an oil tank. The oil conduit is connected to the oil inlet channel (12), and the input end of the oil conduit is connected to a liquid pump. The input end of the liquid pump is connected to the oil tank. The oil conduit is equipped with a solenoid valve.

4. The automatic oil injection lubrication device for a lifting machine according to claim 1, characterized in that: The oil separator (3) has at least four sets of slides (10) inside, and the four sets of slides (10) are used for the passage of four sets of oil conveying expansion rods (2). The oil inlet channel (12) has two sets on the left and right, and the bottom of the two sets of oil inlet channels (12) is provided with guide grooves (19). The two sets of guide grooves (19) on both sides are connected to the two sets of slides (10) on both sides respectively.

5. The automatic oil injection lubrication device for a lifting machine according to claim 1, characterized in that: The oil separator (3) is fixed inside the expansion machine frame (20), the push rod (1) is movably located inside the expansion machine frame (20), and the expansion head (6) extends out of one end of the expansion machine frame (20).

6. The automatic oil injection lubrication device for a lifting machine according to claim 5, characterized in that: An oil receiving tray (21) is provided at one end of the inside of the expansion machine frame (20), and the oil receiving tray (21) is located below the oil distributor (3).

7. The automatic oil injection lubrication device for a lifting machine according to claim 1, characterized in that: The diameter of the first oil delivery tank (7) is larger than the diameter of the second oil delivery tank (8), and the diameter of the second oil delivery tank (8) is larger than the diameter of the third oil delivery tank (9).

Images