A reducer for preventing high temperature overload
By designing a water-cooled circulation system and adjustment mechanism in the reducer, the cooling efficiency and unevenness of traditional reducers under high temperature overload are solved, and more efficient heat dissipation and more uniform temperature control are achieved, which extends the service life of the equipment.
Patent Information
- Application Number
- CN202411265587.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2024-01-30
- Filing Date
- 2024-09-10
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2044-09-10
AI Technical Summary
Traditional reducers are difficult to effectively cool down under high temperature overload, resulting in reduced performance and shortened service life, and uneven cooling may cause safety accidents.
A reducer including a housing, a worm gear and a worm, a water cooling mechanism and a regulating mechanism are designed. The water-cooling mechanism forms a water circulation system through the pump body, connecting pipe, moving pipe and serpentine bent pipe to achieve water-cooling cooling; the adjustment mechanism can adjust the position of the serpentine bent pipe and control the opening and closing state of the second exhaust hole to improve heat exchange efficiency.
It effectively reduces the internal temperature of the equipment, improves the heat dissipation efficiency, maintains the uniformity of the internal temperature of the equipment, extends the service life of the equipment, and improves the stable operation ability of the equipment.
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Figure CN118775534B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of reducers, and in particular to a reducer capable of preventing high-temperature overload. Background Art
[0002] The reducer is a reduction transmission device between the prime mover and the working machine. Its main function is to match the speed and transmit torque between the prime mover and the working machine. According to the transmission method, the reducer can be divided into gear drive reducer and worm drive reducer. It is widely used in metallurgy, coal, building materials, shipbuilding, water conservancy, electric power, engineering machinery and petrochemical industries. During the operation of the reducer, a large amount of heat will be generated due to friction and mechanical energy conversion, causing the internal temperature of the reducer to rise. If the temperature is too high, it will cause the reducer to overheat, affecting its performance and service life, and may even cause safety accidents.
[0003] However, traditional reducers often use heat sinks, fans, radiators and other methods to reduce temperature. Although these methods can help dissipate heat to a certain extent, they still have some defects; traditional reducers can only rely on ventilation or indirect heat dissipation to reduce temperature, so the efficiency is low and cannot effectively respond to high temperature overload problems in a timely manner. In addition, uneven cooling may occur, causing certain parts of the equipment to overheat. Summary of the invention
[0004] In view of the deficiencies in the prior art, the present invention provides a reducer that prevents high-temperature overload, thereby solving the technical problems mentioned in the background technology.
[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a reducer that prevents high-temperature overload, including a shell, a worm wheel and a worm that mesh with each other are arranged in the shell, and the worm is rotatably installed on the shell through a shaft, and a water-cooling mechanism for dissipating heat from the inside of the shell is arranged on the outside of the worm wheel and the worm; the water-cooling mechanism includes a water tank fixedly installed on the outer wall of the shell, a pump body is fixedly installed on one end of the water tank, a connecting pipe is connected to the lower end of the pump body, one end of the connecting pipe is fixedly connected to the water tank, and the connection between the connecting pipe and the water tank is a concave structure, an upper end of one side of the pump body is connected to a liquid outlet pipe, and an upper end of the other side of the water tank is provided with a liquid inlet pipe, and the other ends of the liquid outlet pipe and the liquid inlet pipe are fixedly installed on the top of the shell, and the ends slide
[0006] A moving pipe is provided, and the other end of the moving pipe is fixedly connected with a serpentine curved pipe.
[0007] As a further preferred embodiment of the present technical solution, first exhaust holes are provided on both sides of the shell near the shaft, a row of second exhaust holes are provided on the top of the shell, the upper opening of the second exhaust holes is large and the lower opening is small, and fans are provided on both sides of the shaft near the first exhaust holes.
[0008] As a further preferred embodiment of the present technical solution, adjustment mechanisms for adjusting the position of the serpentine bend pipe are arranged on both sides of the shaft rod, the adjustment mechanisms include half gears fixedly mounted at both ends of the shaft rod, a moving frame is arranged on the outside of the half gear, first racks are fixedly connected to the two ends of the inner side of the moving frame, the first racks are meshed with the half gears for transmission, a connecting rod is fixedly connected to the top of the moving frame, a slide frame is fixedly connected to the top of the connecting rod, and the slide frame is slidably mounted on the shell in the vertical direction, the inner end of the slide frame is fixedly connected to the slide frame, and the moving tube is fixedly mounted on the slide frame.
[0009] As a further preferred embodiment of the present technical solution, a second rack is fixedly connected to both sides of the movable frame, a complete gear is meshedly connected to the outer side of the second rack, and the complete gear is rotatably installed on the shell, and a positioning plate fixedly installed on the shell is provided on the other side of the complete gear, a third rack is slidably connected to the surface of the positioning plate, and the third rack is meshedly connected to the complete gear, ear plates are fixedly connected to both sides of the third rack, a positioning rod is fixedly connected to the ear plate, movable teeth are slidably connected to the positioning rod, and a first spring is provided on the outer wall of the positioning rod.
[0010] As a further preferred embodiment of the present technical solution, moving rods are fixedly connected to both sides of the third rack, limiting rods are fixedly connected to the upper and lower ends of both sides of the surface of the positioning plate, and the moving rods are located between the limiting rods.
[0011] As a further preferred embodiment of the present technical solution, a support rod is fixedly connected to the top of the movable tooth, a row of U-shaped frames is fixedly connected to the top of the support rod, and a plurality of exhaust members are fixedly connected to the outer wall of the U-shaped frame.
[0012] As a further preferred embodiment of the present technical solution, the exhaust member includes a control rod movably arranged on the outer wall of the U-shaped frame, the other end of the control rod extends into the second exhaust hole, and the outer wall is sleeved with a ring, the movable frame is fixedly installed in the second exhaust hole, the top of the control rod is slidably connected to a telescopic rod, and the top of the telescopic rod is fixedly connected to a sealing ring, and the specifications of the sealing ring are matched with the specifications of the second exhaust hole, the outer wall of the telescopic rod is sleeved with a second spring, and the second spring is located between the sealing ring and the control rod.
[0013] Compared with the prior art, it has the following beneficial effects:
[0014] The shaft drives the two fans to rotate synchronously, and in conjunction with the first exhaust hole, the device achieves the inhalation of cold air and the exhaust of hot air, effectively reducing the temperature inside the device. The beneficial effects of this design include cooling the internal temperature of the device, improving the heat dissipation effect of the device, maintaining the internal temperature of the device in an appropriate range, and facilitating operation.
[0015] A water circulation system is formed through the coordinated work of the conveying channel, moving pipe, serpentine elbow and liquid inlet pipe. This water circulation not only allows the cooling water source to be recycled, but also can cool down the reducer and other equipment with water, maintain the temperature balance in the chassis, and improve the stable operation and service life of the equipment. The water source that has been heated is introduced into the water tank through the liquid inlet pipe and mixed with cold water to achieve cooling of the water source. This mixed cooling method can effectively control the temperature of the water source and avoid overheating.
[0016] Through the coordinated work of the moving frame, connecting rod, sliding frame, sleeve rod and other components during the lifting process, The position of the serpentine elbow in the shell can be adjusted, so that the serpentine elbow can fully contact the heat sources in different areas and achieve uniform heat exchange treatment in different areas of the shell; when the serpentine elbow moves, the cooling medium will fully contact the heat source in the shell through the flow channel of the serpentine elbow, and this contact helps to achieve uniform cooling treatment in different areas of the shell and improve the heat exchange efficiency; through the coordinated work of the third rack, control rod, telescopic rod, sealing ring and other combinations, the opening and closing state of the second exhaust hole can be controlled. When the serpentine elbow moves downward, the second exhaust hole is in an open state, and hot air can be discharged through the second exhaust hole; conversely, when the serpentine elbow moves upward, the second exhaust hole is in a closed state, preventing the discharge of hot air. Through such a design, the discharge of hot air in the shell can be better controlled, which is conducive to the stable operation of the equipment; by adjusting the position of the serpentine elbow and controlling the state of the second exhaust hole, the heat exchange process can be flexibly controlled according to actual needs to improve the heat exchange efficiency, which can effectively reduce the internal temperature of the equipment, prevent overheating, and ensure the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG1 is a schematic diagram of the internal structure of a reducer of the present invention;
[0018] FIG2 is a schematic diagram of the overall structure of the present invention;
[0019] FIG3 is a schematic diagram of the structure of the adjustment mechanism in the present invention;
[0020] FIG4 is a schematic structural diagram of the third rack and the positioning plate in the present invention;
[0021] Figure 5 is an enlarged view of point A in Figure 4;
[0022] FIG6 is a schematic diagram of the structure of the water cooling mechanism in the present invention;
[0023] FIG. 7 is a schematic diagram of the structure of the exhaust member in the present invention.
[0024] In the figure: 1, housing; 2, worm gear; 3, worm; 4, water cooling mechanism; 5, adjustment mechanism; 11, first exhaust hole; 12, second exhaust hole; 31, shaft; 32, fan; 41, water tank; 42, pump body; 43, liquid outlet pipe; 44, moving pipe; 45, serpentine pipe; 46, liquid inlet pipe; 51, half gear; 52, moving frame; 53, first rack; 54, connecting rod; 55, sliding frame; 56, sleeve rod; 57, second rack; 58, complete gear; 59, positioning plate; 510, third rack; 511, ear plate; 512, positioning rod; 513, movable teeth; 514, first spring; 515, moving rod; 516, limit rod; 517, support rod; 518, U Frame; 519, control rod; 520, collar; 521, telescopic rod; 522, sealing ring; 523, second spring. DETAILED DESCRIPTION
[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0026] Embodiment 1: In combination with Figures 1 to 7, the present invention provides a technical solution: a reducer for preventing high-temperature overload, comprising a housing 1, wherein a worm wheel 2 and a worm 3 meshing with each other are arranged in the housing 1, and the worm 3 is rotatably mounted on the housing 1 through a shaft 31, and a water cooling mechanism 4 for dissipating heat from the inside of the housing 1 is arranged on the outer side of the worm wheel 2 and the worm 3; first exhaust holes 11 located near the shaft 31 are opened on both sides of the housing 1, and a row of second exhaust holes 12 are opened on the top of the housing 1, the upper opening of the second exhaust hole 12 is large and the lower opening is small, and fans 32 located near the first exhaust holes 11 are arranged on both sides of the shaft 31; driven by the shaft 31, the two fans 32 present a synchronous rotation trend, and the rotating fan 32 effectively discharges hot air while inhaling cold air. This process is mainly achieved through the first exhaust hole 11 on one side of the housing 1. First, during the rotation of the fan 32, cold air is inhaled from the external environment, and the cold air enters the housing 1 through the first exhaust hole 11. Inside, it creates conditions for heat exchange inside the device. Then, another fan 32 works with the first exhaust hole 11 to guide the inhaled cold air into the device. In this process, the cold air exchanges heat with the hot air inside the device, which reduces the temperature inside the device. Finally, with the help of the first exhaust hole 11, the hot air is discharged by the fan 32. This process continues, so that the inside of the device is always kept in a suitable temperature range, which is conducive to the stable operation of the device. In short, the two fans 32 are driven to rotate synchronously by the shaft 31, and cooperate with the first exhaust hole 11. The device realizes the intake of cold air and the discharge of hot air. This design effectively reduces the temperature inside the device; the water cooling mechanism 4 includes a water tank 41 fixedly installed on the outer wall of the shell 1, and a pump body 42 is fixedly installed at one end of the water tank 41. The lower end of the pump body 42 is connected to a connecting pipe, and one end of the connecting pipe is fixedly connected to the water tank 41, and the connecting pipe and the water tank 41 are connected at a concave structure. The upper end of one side of the pump body 42 is connected to a liquid outlet pipe 43. The water tank 41 A liquid inlet pipe 46 is arranged at the upper end of the other side, the other ends of the liquid outlet pipe 43 and the liquid inlet pipe 46 are fixedly installed on the top of the shell 1, and a moving pipe 44 is slidably arranged at the end, and a serpentine curved pipe 45 is fixedly connected to the other end of the moving pipe 44.
[0027] In the embodiment of the present invention, in the actual device, the serpentine bend 45 is located on both sides of the worm wheel 2 and the worm 3, the moving pipe 44 is located on the liquid outlet pipe 43 and slides in the vertical direction, and the pump body 42 plays a vital role. It can introduce the water source inside the water tank 41 into the liquid outlet pipe 43 through the liquid outlet pipe 43. This process is like a conveying channel, taking the water source from the water tank 41 and guiding it to the liquid outlet pipe 43. Next, the water source will be evenly introduced into the serpentine bend 45 through the moving pipe 44. The unique design of the serpentine bend 45 is unique in that it can make the water source fully contact and absorb the heat in the shell 1 during the flow process. In this way, the water temperature will gradually rise, achieving the purpose of heating. The heated water source will continue to move forward and be introduced into the water tank 41 through the liquid inlet pipe 46. Such a design forms a closed loop, namely, water circulation. An important function of water circulation is to cool the reducer with water. In this way, it can not only ensure the normal operation of the equipment, but also reduce the operating temperature of the equipment and increase the service life of the equipment. After the heated water source enters the water tank 41, it will be mixed with the cold water inside the water tank 41 for cooling. This mixed cooling method allows the temperature of the water source to be controlled and avoids overheating. Finally, the excess heat will diffuse into the surrounding air through the water tank 41. This process is like a radiator, which effectively dissipates the heat generated by the equipment, avoids overheating of the equipment, and ensures the normal operation of the equipment. In summary, this device realizes the functions of water source introduction, heating, cooling and heat dissipation through the coordinated work of the pump body 42, the moving pipe 44, the serpentine elbow 45, the water tank 41 and other components. This not only ensures the normal operation of the equipment, but also increases the service life of the equipment and reduces the maintenance cost of the equipment. In practical applications, this device is widely used in various occasions requiring water cooling and provides strong technical support for my country's industrial production.
[0028] Embodiment 2: In combination with Figures 3, 4, 5, 6 and 7, on the basis of Embodiment 1, an adjustment mechanism 5 for adjusting the position of the serpentine bend tube 45 is provided on both sides of the shaft 31, and the adjustment mechanism 5 includes a half gear 51 fixedly mounted on both ends of the shaft 31, and a moving frame 52 is provided on the outer side of the half gear 51, and the first rack 53 is fixedly connected to the inner ends of the moving frame 52, and the first rack 53 is meshed with the half gear 51 for transmission, and a connecting rod 54 is fixedly connected to the top of the moving frame 52, and a slide frame 55 is fixedly connected to the top of the connecting rod 54, and the slide frame 55 is slidably mounted on the housing 1 in the vertical direction, and the inner end of the slide frame 55 is fixedly connected to the slide frame 55, and the moving tube 44 is fixedly mounted on the slide frame 55; second racks 57 are fixedly connected to both sides of the moving frame 52, and a complete gear 58 is meshed and connected to the outer side of the second rack 57, and the complete gear 58 is rotatably mounted on the housing 1 On the other side of the complete gear 58, a positioning plate 59 fixedly mounted on the housing 1 is provided, and a third rack 510 is slidably connected to the surface of the positioning plate 59, and the third rack 510 is meshed with the complete gear 58, and ear plates 511 are fixedly connected to both sides of the third rack 510, and a positioning rod 512 is fixedly connected to the ear plate 511, and a movable tooth 513 is slidably connected to the positioning rod 512, and a first spring 514 is sleeved on the outer wall of the positioning rod 512; the movable tooth 513 is at a certain distance from the third rack 510, and the movable tooth 513 is pushed to slide outward on the positioning rod 512 under the elastic force of the first spring 514, and when the complete gear 58 drives the third rack 510 to move upward or downward to the end, the limiting rod 516 cooperates with the moving rod 515 to limit the position of the third rack 510, and at this time, the complete gear 58 is located at the movable tooth 513 The third rack 510 is driven to keep the complete gear 58 in the original position during the rotation, and the third rack 510 is driven to keep the complete gear 58 in the original position, so that the exhaust member seals the second exhaust hole 12 or opens the second exhaust hole 12; the third rack 510 is fixedly connected with moving rods 515 on both sides, and the upper and lower ends of the two sides of the surface of the positioning plate 59 are fixedly connected with limiting rods 516, and the moving rods 515 are located between the limiting rods 516; the top of the movable tooth 513 is fixedly connected with a support rod 517, and the top of the support rod 517 is fixedly connected with a row of U-shaped frames 518, and the outer wall of the U-shaped frame 518 is fixedly connected with a plurality of exhaust members;The exhaust member includes a control rod 519 movably arranged on the outer wall of the U-shaped frame 518, and the control rod 519 can be slidably installed on the U-shaped frame 518, so that when the U-shaped frame 518 moves up and down, it can push the control rod 519 to be located in the second exhaust hole 12 and slide on the ring 520, the other end of the control rod 519 extends into the second exhaust hole 12, and the outer wall is sleeved with a ring 520, the movable frame 52 is fixedly installed in the second exhaust hole 12, the top of the control rod 519 is slidably connected with a telescopic rod 521, and the top of the telescopic rod 521 is fixedly connected with a sealing ring 522, and the specifications of the sealing ring 522 are mutually adapted to the specifications of the second exhaust hole 12, the outer wall of the telescopic rod 521 is sleeved with a second spring 523, and the second spring 523 is located between the sealing ring 522 and the control rod 519; under the elastic force of the second spring 523, the sealing ring 522 can be driven to move in cooperation with the telescopic rod 521 Move toward the control rod 519 so that the sealing ring 522 can seal the second exhaust hole 12.
[0029] In the embodiment of the present invention, during the rotation of the shaft 31, the half gear 51 driven by it will rotate synchronously with it. The function of the half gear 51 is not only to rotate, but it can also cooperate with the first racks 53 on both sides to operate, thereby driving the moving frame 52, the connecting rod 54, the sliding frame 55, and the sleeve rod 56 to reciprocate and lift. This lifting process is of great significance because it can directly affect the lifting and lowering control of the moving tube 44 and the serpentine bend 45 by the sleeve rod 56. In this way, we can adjust the position of the serpentine bend 45 in the shell 1 so that it can perform heat exchange treatment on different areas; the serpentine bend 45 will pass through different areas during the movement. At this time, the cooling medium will fully contact the heat source in the shell 1 through the flow channel in the serpentine bend 45. This contact helps to achieve uniform cooling treatment of different areas in the shell 1. In addition, the up and down movement of the moving frame 52 will also drive the second rack 57 to move up and down synchronously. In this process, the second rack 57 will drive the complete gear 58 to rotate synchronously, and the complete gear 58 The rotation of the third rack 510 will drive the third rack 510 to move up and down; when the third rack 510 moves upward, the serpentine bend 45 will move downward, and at this time, the third rack 510 will cooperate with the ear plate 511, the positioning rod 512, the movable teeth 513, and the first spring 514 to drive the support rod 517 and the U-shaped frame 518;This combination will drive the control rod 519 located in the second exhaust hole 12 to move upward, so that the control rod 519 is located on the ring 520 and slides upward. At the same time, the control rod 519 will cooperate with the telescopic rod 521 and the second spring 523 to drive the sealing ring 522 to move upward, so that the sealing ring 522 no longer seals the second exhaust hole 12. In this way, the second exhaust hole 12 will be in an open state, and the hot air in the shell 1 can be discharged through the second exhaust hole 12. Conversely, when the third rack 510 moves downward, the serpentine elbow 45 will move upward. Similarly, the third rack 510 will cooperate with the ear plate 511, the positioning rod 512, the movable teeth 513, and the first spring 514 to drive the support rod 517 and the U-shaped frame 518, thereby driving the control rod 519 located in the second exhaust hole 12 to move downward, so that the control rod 519 is located on the ring 520 and slides downward. At the same time, the control rod 519 The telescopic rod 521 and the second spring 523 will also drive the sealing ring 522 to move downward, so that the sealing ring 522 no longer seals the second exhaust hole 12. In this way, the second exhaust hole 12 will be in a closed state. Through such a design, we can better control the discharge of hot air in the shell 1. At the same time, we can also better adjust the position of the serpentine elbow 45 to perform heat exchange treatment on different areas and improve the heat exchange efficiency. All of this is to ensure that the equipment can operate efficiently and stably. ;
[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A speed reducer for preventing high temperature overload, comprising a housing (1), characterized in that: A worm wheel (2) and a worm (3) meshing with each other are arranged in the housing (1), and the worm (3) is rotatably mounted on the housing (1) via a shaft (31), and a water cooling mechanism (4) for dissipating heat from the inside of the housing (1) is arranged outside the worm wheel (2) and the worm (3); The water cooling mechanism (4) comprises a water tank (41) fixedly mounted on the outer wall of the housing (1); a pump body (42) is fixedly mounted on one end of the water tank (41); a connecting pipe is connected to the lower end of the pump body (42); one end of the connecting pipe is fixedly connected to the water tank (41); and the connecting pipe and the water tank (41) are in a concave structure; an upper end of one side of the pump body (42) is connected to a liquid outlet pipe (43); an upper end of the other side of the water tank (41) is provided with a liquid inlet pipe (46); the other ends of the liquid outlet pipe (43) and the liquid inlet pipe (46) are both fixedly mounted on the top of the housing (1); a moving pipe (44) is slidably provided at the end; and the other end of the moving pipe (44) is fixedly connected to a serpentine curved pipe (45); First exhaust holes (11) located near the shaft (31) are provided on both sides of the shell (1), a row of second exhaust holes (12) are provided on the top of the shell (1), the second exhaust holes (12) have a large upper opening and a small lower opening, and fans (32) located near the first exhaust holes (11) are provided on both sides of the shaft (31); An adjustment mechanism (5) for adjusting the position of the serpentine bend tube (45) is arranged on both sides of the shaft (31), the adjustment mechanism (5) comprising a half gear (51) fixedly mounted on both ends of the shaft (31), a moving frame (52) is arranged on the outside of the half gear (51), first racks (53) are fixedly connected to both ends of the inner side of the moving frame (52), the first racks (53) are meshed with the half gear (51) for transmission, a connecting rod (54) is fixedly connected to the top of the moving frame (52), a sliding frame (55) is fixedly connected to the top of the connecting rod (54), and the sliding frame (55) is slidably mounted on the housing (1) in a vertical direction, the inner end of the sliding frame (55) is fixedly connected to the sliding frame (55), and the moving tube (44) is fixedly mounted on the sliding frame (55); The movable frame (52) is fixedly connected with a second rack (57) on both sides, the second rack (57) is meshingly connected with a complete gear (58) on the outside, and the complete gear (58) is rotatably mounted on the housing (1), the other side of the complete gear (58) is provided with a positioning plate (59) fixedly mounted on the housing (1), the surface of the positioning plate (59) is slidably connected with a third rack (510), and the third rack (510) is meshingly connected with the complete gear (58), the third rack (510) is fixedly connected with ear plates (511) on both sides of the third rack (510), the ear plates (511) are fixedly connected with a positioning rod (512), the positioning rod (512) is slidably connected with a movable tooth (513), and the outer wall of the positioning rod (512) is sleeved with a first spring (514); Moving rods (515) are fixedly connected to both sides of the third rack (510), and limiting rods (516) are fixedly connected to the upper and lower ends of both sides of the surface of the positioning plate (59), and the moving rods (515) are located between the limiting rods (516); The top of the movable teeth (513) is fixedly connected to a support rod (517), the top of the support rod (517) is fixedly connected to a row of U-shaped frames (518), and the outer wall of the U-shaped frame (518) is fixedly connected to a plurality of exhaust components; The exhaust member comprises a control rod (519) movably arranged on the outer wall of the U-shaped frame (518), the other end of the control rod (519) extends into the second exhaust hole (12), and the outer wall is sleeved with a collar (520), the movable frame (52) is fixedly installed in the second exhaust hole (12), the top of the control rod (519) is slidably connected to a telescopic rod (521), and the top of the telescopic rod (521) is fixedly connected to a sealing ring (522), and the specifications of the sealing ring (522) are mutually compatible with the specifications of the second exhaust hole (12), and the outer wall of the telescopic rod (521) is sleeved with a second spring (523), and the second spring (523) is located between the sealing ring (522) and the control rod (519).
Citation Information
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