A circulating pump mechanical seal assembly

Abstract

The present invention discloses a circulation pump mechanical seal assembly, belonging to the technical field of seal assemblies, the circulation pump mechanical seal assembly comprises a dynamic ring seal, a shaft sleeve and a static ring seal, one end of the dynamic ring seal and one end of the static ring seal are both located inside the shaft sleeve, the side wall of the dynamic ring seal is provided with an annular cavity, an upper fixing ring and a lower fixing ring are arranged in the annular cavity, the bottom wall of the upper fixing ring and the top wall of the lower fixing ring are both fixedly connected with a support ring, a double-sided gear ring is slidably connected between the two support rings, the side wall of the annular cavity is provided with a through hole, a driving rod is arranged in the through hole, and two protrusion mechanisms for fixing the position of the dynamic ring seal are also arranged in the annular cavity. The present invention arranges a protrusion mechanism between the dynamic ring seal and the shaft sleeve, so that the dynamic ring seal can be stably fixed in a designated position for a long time, thereby facilitating the guarantee of the sealing performance of the mechanical seal assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing components, and in particular relates to a mechanical sealing component for a circulating pump. Background Art

[0002] A circulating pump is a pump used to circulate fluids, such as water or air. It is widely used in heating systems, air conditioning systems, solar energy systems, and industrial processes. In winter, the circulating pump can ensure the circulation of water in the heating system, transfer heat energy from the boiler to the radiator, and then return to the boiler. In summer, the circulating pump can help the coolant in the air conditioning system circulate and remove indoor heat. The mechanical seal assembly is an important component of the circulating pump. It is a device used to solve the sealing between the rotating shaft and the body. Its main function is to prevent the fluid in the pump from leaking out of the pump, and prevent foreign impurities from entering the pump, ensuring the normal operation and long-term stability of the pump.

[0003] Since the impeller and other components inside the circulation pump need to rotate continuously during operation, in order to ensure the sealing performance of the sealing assembly, in addition to the need to regularly inspect the location of the sealing assembly, the sealing assembly itself needs to be inspected offline at regular intervals. Common sealing assemblies are usually fixed in place with screws after installation, but during the disassembly process, after removing the screws one by one, many sleeves and dynamic ring seals can only be fixed by springs. In order to keep the dynamic ring seal in contact with the static ring, the elastic force of the spring needs to be ensured. However, after long-term use, the elastic force of the spring may be damaged. Since the spring is set between the sleeve and the seal, it is not convenient to repair, resulting in reduced performance of the mechanical seal assembly. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a circulating pump mechanical seal assembly.

[0005] The technical solution adopted to solve the above technical problems is:

[0006] A circulating pump mechanical seal assembly comprises a dynamic ring seal, a shaft sleeve and a static ring seal, wherein one end of the dynamic ring seal and one end of the static ring seal are both located inside the shaft sleeve, an annular cavity is provided on the side wall of the dynamic ring seal, an upper fixing ring and a lower fixing ring are arranged in the annular cavity, a support ring is fixedly connected to the bottom wall of the upper fixing ring and the top wall of the lower fixing ring, a double-sided gear ring is slidably connected between the two support rings, a through hole is provided on the side wall of the annular cavity, a driving rod is arranged in the through hole, a top gear is fixedly connected to the side wall of one end of the driving rod away from the through hole, the top gear is meshed with the upper end of the double-sided gear ring, and two protrusion mechanisms for fixing the position of the dynamic ring seal are also arranged in the annular cavity;

[0007] The inner wall of the sleeve is provided with fixing holes at both ends, the heights of the two fixing holes are consistent, the side wall of the sleeve is provided with a rotating hole, the position of the rotating hole corresponds to the position of the through hole, and the inner wall of the sleeve is provided with a protection mechanism for protecting the rotating hole.

[0008] Through the above technical solution, a protrusion mechanism is set between the dynamic ring seal and the shaft sleeve, so that the dynamic ring seal can be stably fixed in a specified position for a long time, thereby ensuring the sealing performance of the mechanical seal assembly. At the same time, the protection mechanism can prevent the drive rod from being accidentally driven. The staff can easily separate the dynamic ring seal from the shaft sleeve by turning the drive rod, which is convenient for the staff to inspect the inside of the sealing assembly.

[0009] Furthermore, an upper placement groove is formed on the bottom wall of the upper fixed ring, an upper rotating ring is rotatably connected in the upper placement groove, and the driving rod is fixedly connected to the inner wall of the upper rotating ring.

[0010] Through the above technical solution, the upper rotating ring fixedly connected to the driving rod can rotate in the upper placement groove, so that the staff can rotate the driving rod, so that the top gear can stably drive the double-sided gear ring to rotate, and so that the protrusion mechanism can be stably extended.

[0011] Furthermore, the protrusion mechanism includes a bottom gear, a lower rotating ring, an extension rod, an arc rod, a stabilizing ring and two side rods, the top wall of the lower fixing ring is provided with two lower placement grooves, the lower rotating ring is rotatably connected to the inner wall of the lower placement groove, the inner wall of the lower rotating ring is provided with an internal thread, one end of the extension rod is provided with a thread groove, the internal thread is threadedly connected to the thread groove, the side wall of the bottom gear is fixedly connected to the side wall of the lower rotating ring, the bottom gear is meshed with the lower end of the double-sided gear ring, the two side rods are respectively fixedly connected to the side walls on both sides of the extension rod away from the thread groove, the arc rod is fixedly connected to the top wall of the lower fixing ring, the stabilizing ring is fixedly set in the arc rod, the extension rod passes through the stabilizing ring, the inner wall of the stabilizing ring is provided with two slots, the two side rods are respectively slidably connected to the inner walls of the two slots, the positions of the two extension rods correspond to the positions of the two fixing holes, and the outer diameter of the extension rod is consistent with the aperture of the fixing hole.

[0012] Through the above technical solution, the rotation of the double-sided gear ring will drive the bottom gear to rotate, and the rotation of the bottom gear will drive the lower rotating ring to rotate, so that the two extension rods can be extended from the stabilizing ring, and the side rods on the side walls of the extension rods will move outward along the slots inside the stabilizing ring, thereby being inserted into the fixing holes to fix the dynamic ring seal and the shaft sleeve together.

[0013] Furthermore, the two extension rods are located on the same straight line, and the angle between the position of the driving rod and the straight line where the two extension rods are located is 90°.

[0014] Through the above technical solution, in order to make the connection between the dynamic ring seal and the shaft sleeve more stable, the angle between the two extension rods is optimally 180°, so the two extension rods are preferably in the same straight line. At the same time, the driving rod connected to the outside world needs to be driven by the staff, so in order to ensure stability during rotation, the distance between the driving rod and the two extension rods needs to be consistent, so the driving rod is perpendicular to the straight line where the extension rods are located.

[0015] Furthermore, a telescopic rod is fixedly connected to the side wall of the double-sided gear ring, the end of the telescopic rod away from the double-sided gear ring is spherical, an arc groove is opened on the inner wall of the sleeve, and the end of the telescopic rod away from the double-sided gear ring is slidably connected to the inner wall of the arc groove.

[0016] Through the above technical solution, if you want to separate the dynamic ring seal and the sleeve, you need to use a tool to rotate the drive rod. The rotation of the drive rod will cause the double-sided gear ring to rotate, and then the telescopic rod on the side wall of the double-sided gear ring will slide along the arc groove.

[0017] Furthermore, the arc rod is divided into two sections, the two sections of the arc rod are respectively fixedly connected to the top wall of the lower fixed ring, the stabilizing ring is fixedly connected to the side wall of the two sections of the arc rod away from one end of the lower fixed ring, and the center position of the stabilizing ring is opposite to the center position of the lower rotating ring.

[0018] Through the above technical solution, the setting of the stabilizing ring and the arc rod allows the extension rod to stably move outward or inward along the direction of the slot, thereby keeping the dynamic ring seal and the shaft sleeve in a connected or separated state. The center position of the stabilizing ring is opposite to the center position of the lower rotating ring, which makes it easier for the extension rod to extend from the lower rotating ring.

[0019] Furthermore, the protection mechanism includes an arc-shaped rack, a curved rod, a rotating gear, a rotating rod and a protective cover, the arc-shaped rack is slidably connected to the inner wall of the sleeve, the arc-shaped rack is located above the arc-shaped groove, the curved rod is fixedly connected to the bottom wall of the arc-shaped rack, the curved rod is "L"-shaped, the telescopic rod is against the side wall of the curved rod, the rotating rod passes through the side wall of the sleeve, one end of the rotating rod is fixedly connected to the rotating gear, the rotating gear is meshed with the arc-shaped rack, the protective cover is fixedly connected to one end of the rotating rod away from the rotating gear, the protective cover is located in front of the rotating hole, the size of the protective cover is larger than the aperture of the rotating hole, the inner wall of the protective cover is magnetically designed, and the rotating hole is made of magnetic metal.

[0020] Through the above technical solution, when the telescopic rod follows the movement of the double-sided gear ring, it will press against the curved rod to drive the arc-shaped rack to move together, and then the rotating gear will drive the rotating rod and the protective cover to rotate, thereby driving the protective cover to the position below the rotating hole. Since the staff also need to rotate the driving rod through the rotating hole, the protective cover will not move to the position of the rotating hole to affect the staff.

[0021] Furthermore, a movement groove is formed on the inner wall of the shaft sleeve, a sliding rod is fixedly connected to the side wall of the arc-shaped rack, and the sliding rod is slidably connected to the inner wall of the movement groove.

[0022] Through the above technical solution, the arc-shaped rack slides along the motion groove under the action of the sliding rod, so that the arc-shaped rack can slide stably. The motion groove provides a precise guide path for the sliding rod, ensuring the straightness and position accuracy during the sliding process, and by limiting the freedom of the sliding rod, the motion groove helps to reduce unnecessary vibration or offset, thereby improving the stability of the system and the consistency of work. The length of the motion groove is long enough to support the movement of the arc-shaped rack. Moreover, since the motion groove is arranged inside the shaft sleeve, the motion groove as a whole is also arranged in an arc shape.

[0023] Furthermore, a slope block is fixedly connected in the arc groove, the height of the slope block is greater than the depth of the arc groove, and the end of the slope block facing the curved rod is a curved slope.

[0024] Through the above technical solution, the setting of the slope block can push the telescopic rod out of the telescopic rod when the telescopic rod moves to the end of the arc groove, so that the telescopic rod is no longer in the arc groove, which is convenient for the staff to separate the dynamic ring seal from the sleeve. The arc surface provides a smooth transition from one height to another, reducing impact and vibration, which is very important for protecting equipment and improving operating comfort. In addition, compared with the right-angle edge, the arc surface design can reduce the pressure concentration on the contact surface, thereby reducing the wear rate and extending the service life. At the same time, the arc surface can better disperse the force applied to it, which helps to evenly distribute the pressure and reduce the risk of damage caused by local stress concentration.

[0025] Through the above technical solution, the beneficial effects of the present invention are as follows:

[0026] (1) The present invention arranges a driving rod, a top gear, a double-sided gear ring, a bottom gear, a lower rotating ring, an extension rod, an arc rod, a stabilizing ring and two side rods between the dynamic ring seal and the shaft sleeve. When a worker rotates the driving rod, the double-sided gear ring can drive the bottom gear to rotate, thereby causing the two extension rods to move outward, so that the dynamic ring seal and the shaft sleeve are in a fixed state. The driving rod can also be rotated in the opposite direction to separate the dynamic ring seal from the shaft sleeve, which is convenient for workers to inspect the sealing assembly. There is no need to use components that may cause fatigue, such as springs, and it is convenient to maintain the position of the dynamic ring seal for a long time.

[0027] (2) The present invention arranges a telescopic rod, an arc-shaped rack, a curved rod, a rotating gear, a rotating rod and a protective cover on the side wall of the shaft sleeve. When the staff rotates the driving rod, the telescopic rod will also drive the arc-shaped rack to move, thereby rotating the protective cover to a position close to the rotating hole. The staff can then manually rotate the protective cover to the rotating hole. Since the inner wall of the protective cover is magnetically arranged, it will be directly adsorbed to the rotating hole, thereby preventing the driving rod from being accidentally rotated. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structural connection between the dynamic ring seal and the shaft sleeve in the present invention;

[0030] Figure 3 It is a structural schematic diagram of the shaft sleeve in the present invention;

[0031] Figure 4 It is a schematic diagram of the structural connection between the upper fixing ring and the lower fixing ring in the present invention;

[0032] Figure 5 It is a schematic diagram of the structural connection of the protrusion mechanism in the present invention;

[0033] Figure 6 yes Figure 5 A partial enlarged view of the middle A;

[0034] Figure 7 It is a schematic diagram of the structural connection of the protection mechanism in the present invention;

[0035] Figure 8 It is a schematic diagram of the structural connection between the sliding rod and the motion groove in the present invention.

[0036] 1. The camshaft is provided with a plurality of teeth, and a plurality of teeth are provided at the camshaft. The camshaft is provided with a plurality of teeth, and a plurality of teeth are provided at the camshaft. In the embodiment of the present invention, the camshaft is provided with a plurality of teeth, and a plurality of teeth are provided at the camshaft. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] like Figure 1 - Figure 8 As shown, this embodiment provides a mechanical seal assembly for a circulation pump, including a dynamic ring seal 1, a shaft sleeve 2, and a static ring seal 3. One end of the dynamic ring seal 1 and one end of the static ring seal 3 are both located inside the shaft sleeve 2. The static ring seal 3 surrounds the static ring and fits tightly with it to provide a static seal. The static ring itself does not rotate with the shaft. The dynamic ring seal 1 not only provides a seal between the dynamic ring and the shaft, but also helps the dynamic ring to rotate with the shaft. An annular cavity is provided on the side wall of the dynamic ring seal 1. An upper fixed ring 4 and a lower fixed ring 5 are arranged in the annular cavity. A support ring 6 is fixedly connected to the bottom wall of the upper fixed ring 4 and the top wall of the lower fixed ring 5. A double-sided gear ring 7 is slidably connected between the two support rings 6. The support ring 6 can support the double-sided gear ring 7 without affecting the rotation of the double-sided gear ring 7. Bearings and other components can be arranged between the support ring 6 and the double-sided gear ring 7. The middle position is designed to facilitate the passage of the rotating shaft of the circulation pump.

[0039] A through hole 8 is provided on the side wall of the annular cavity, a driving rod 9 is arranged in the through hole 8, an upper placement groove 13 is provided on the bottom wall of the upper fixed ring 4, the upper placement groove 13 is a semicircular groove, which is convenient for placing the upper rotating ring 14, and a hook is provided inside the upper placement groove 13, such as a bearing and other components, so that the upper rotating ring 14 will not fall due to gravity during the rotation process, the upper rotating ring 14 is rotatably connected in the upper placement groove 13, and the driving rod 9 is fixedly connected to the inner wall of the upper rotating ring 14, so that Figure 4 It can be seen that a rectangular hole is provided at the end of the driving rod 9, so the staff can use a tool with the same shape as the hole to rotate the driving rod 9. The upper rotating ring 14 fixedly connected to the driving rod 9 can rotate in the upper placement groove 13, so that the staff can rotate the driving rod 9, so that the top gear 10 can stably drive the double-sided gear ring 7 to rotate, so that the protrusion mechanism can be stably extended. The top gear 10 and the bottom gear 15 mentioned below are both bevel gears, which can be driven by the double-sided gear ring 7 to rotate or drive the double-sided gear ring 7 to rotate. The transmission between the bevel gear and the double-sided gear ring 7 is similar to the transmission between two bevel gears. Since the contact between the bevel gears is point contact, this helps to reduce friction losses.

[0040] A top gear 10 is fixedly connected to the side wall of one end of the driving rod 9 away from the through hole 8, and the top gear 10 is meshed with the upper end of the double-sided gear ring 7. Two protrusion mechanisms for fixing the position of the dynamic ring seal 1 are also installed in the annular cavity. The protrusion mechanism includes a bottom gear 15, a lower rotating ring 16, an extension rod 17, an arc rod 18, a stabilizing ring 19 and two side rods 20. The staff uses a tool to insert the rotating hole 12 so that the driving rod 9 is driven to rotate. The rotation of the driving rod 9 will cause the top gear 10 to rotate, and the double-sided gear ring 7 meshing with the top gear 10 will rotate on the support ring 6. The rotation of the double-sided gear ring 7 will drive the two bottom gears 15 to rotate, and the rotation of the bottom gear 15 will drive the lower rotating ring 16 to rotate. Therefore, the internal thread 22 inside the lower rotating ring 16 will cause the extension rod 17 to move inward. Under the action of the slot 24 on the inner wall of the stabilizing ring 19, the extension rod 17 will move along the axial direction of the lower rotating ring 16, thereby causing the extension rod 17 to disengage from the fixing hole 11.

[0041] The top wall of the lower fixed ring 5 is provided with two lower placement grooves 21, and the lower rotating ring 16 is rotatably connected to the inner wall of the lower placement groove 21. The lower placement groove 21 is designed to be semicircular like the upper placement groove 13, so as to facilitate the lower rotating ring 16 to rotate inside the device.

[0042] An internal thread 22 is provided on the inner wall of the lower rotating ring 16, and a thread groove 23 is provided at one end of the extension rod 17. The internal thread 22 is threadedly connected to the thread groove 23. The two extension rods 17 are on the same straight line, and the angle between the position of the driving rod 9 and the straight line where the two extension rods 17 are located is 90°. In order to make the connection between the dynamic ring sealing ring 1 and the sleeve 2 more stable, the angle between the two extension rods 17 is 180° at best. Therefore, it is best for the two extension rods 17 to be on the same straight line. At the same time, the driving rod 9 connected to the outside world needs to be driven by the staff. Therefore, in order to ensure stability during rotation, the distance between the driving rod 9 and the two extension rods 17 needs to be consistent. Therefore, the driving rod 9 is perpendicular to the straight line where the extension rods 17 are located.

[0043] The side wall of the bottom gear 15 is fixedly connected to the side wall of the lower rotating ring 16, the bottom gear 15 is meshed with the lower end of the double-sided gear ring 7, the two side rods 20 are respectively fixedly connected to the side walls of the extension rod 17 away from the thread groove 23, the arc rod 18 is fixedly connected to the top wall of the lower fixed ring 5, the stabilizing ring 19 is fixedly set in the arc rod 18, the extension rod 17 passes through the stabilizing ring 19, the arc rod 18 is divided into two sections, the two sections of the arc rod 18 are respectively fixedly connected to the top wall of the lower fixed ring 5, and the stabilizing ring 19 is fixedly connected At the side wall of one end of the two arc-shaped rods 18 away from the lower fixed ring 5, the center position of the stabilizing ring 19 is opposite to the center position of the lower rotating ring 16. The setting of the stabilizing ring 19 and the arc-shaped rod 18 allows the extension rod 17 to stably move outward or inward along the direction of the slot 24, thereby maintaining a connection or separation state between the dynamic ring sealing ring 1 and the sleeve 2. The center position of the stabilizing ring 19 is opposite to the center position of the lower rotating ring 16, which makes it easier for the extension rod 17 to extend from the lower rotating ring 16.

[0044] Two slots 24 are provided on the inner wall of the stabilizing ring 19, and two side rods 20 are slidably connected to the inner walls of the two slots 24 respectively. The positions of the two extension rods 17 correspond to the positions of the two fixing holes 11, and the outer diameter of the extension rod 17 is consistent with the aperture of the fixing hole 11. The rotation of the double-sided gear ring 7 will drive the bottom gear 15 to rotate, and the rotation of the bottom gear 15 will drive the lower rotating ring 16 to rotate, so that the two extension rods 17 can be extended from the stabilizing ring 19, and the side rods 20 on the side walls of the extension rods 17 will move outward along the slots 24 inside the stabilizing ring 19, thereby being inserted into the fixing hole 11 to fix the dynamic ring seal 1 and the shaft sleeve 2 together.

[0045] Fixing holes 11 are respectively provided at both ends of the inner wall of the sleeve 2, and the heights of the two fixing holes 11 are consistent. A rotating hole 12 is provided on the side wall of the sleeve 2, and the position of the rotating hole 12 corresponds to the position of the through hole 8. At the same time, the size of the fixing hole 11 is also consistent with the size of the extension rod 17. When the extension rod 17 is driven outward, the extension rod 17 will be inserted into the fixing hole 11, thereby fixing the position between the dynamic ring sealing ring 1 and the sleeve 2. The rotating hole 12 corresponds to the position of the through hole 8, which is also convenient for the staff to use tools to rotate the driving rod 9.

[0046] A telescopic rod 25 is fixedly connected to the side wall of the double-sided gear ring 7. The end of the telescopic rod 25 away from the double-sided gear ring 7 is spherical. The spherical design allows the telescopic rod 25 to move out from the bottom of the arc-shaped rack 27 when the dynamic ring seal 1 is taken out. At the same time, the bottom of the arc-shaped rack 27 can also be designed to be arc-shaped, which makes it more convenient to squeeze the telescopic rod 25. An arc-shaped groove 26 is provided on the inner wall of the sleeve 2. The end of the telescopic rod 25 away from the double-sided gear ring 7 is slidably connected to the inner wall of the arc-shaped groove 26. A sloped block 34 is fixedly connected in the arc-shaped groove 26. The height of the sloped block 34 is greater than the depth of the arc-shaped groove 26. The end of the sloped block 34 facing the curved rod 28 is a curved slope. The design of the sloped block 34 When the telescopic rod 25 moves to the end of the arc groove 26, the telescopic rod 25 can be pushed out of the telescopic rod 25, so that the telescopic rod 25 is no longer in the arc groove 26, which is convenient for the staff to separate the dynamic ring seal 1 from the sleeve 2. The arc surface provides a smooth transition from one height to another, reducing impact and vibration, which is very important for protecting equipment and improving operating comfort. In addition, compared with the right-angle edge, the arc surface design can reduce the pressure concentration on the contact surface, thereby reducing the wear rate and extending the service life. At the same time, the arc surface can better disperse the force applied thereto, which helps to evenly distribute the pressure and reduce the risk of damage caused by local stress concentration.

[0047] A protection mechanism for protecting the rotating hole 12 is provided on the inner wall of the sleeve 2, and the protection mechanism includes an arc-shaped rack 27, a curved rod 28, a rotating gear 29, a rotating rod 30 and a protective cover 31. When the double-sided gear ring 7 rotates, the telescopic rod 25 fixed to the side wall of the double-sided gear ring 7 will slide in the arc-shaped groove 26. The movement of the telescopic rod 25 will cause the curved rod 28 to drive the arc-shaped rack 27 to move along the moving groove 32. When the telescopic rod 25 moves to the end of the arc-shaped groove 26, the slope block 34 will gradually push the telescopic rod 25 out of the arc-shaped groove 26, and then the staff can remove the dynamic ring sealing ring 1 from the sleeve 2. The spherical telescopic rod 25 will be squeezed and retracted by the arc-shaped rack 27, thereby facilitating the staff to remove the dynamic ring sealing ring 1.

[0048] The arc-shaped rack 27 is slidably connected to the inner wall of the sleeve 2, and a motion groove 32 is provided on the inner wall of the sleeve 2. A sliding rod 33 is fixedly connected to the side wall of the arc-shaped rack 27, and the sliding rod 33 is slidably connected to the inner wall of the motion groove 32. Under the action of the sliding rod 33, the arc-shaped rack 27 slides along the motion groove 32, so that the arc-shaped rack 27 can slide stably. The motion groove 32 provides a precise guide path for the sliding rod 33, ensuring the straightness and position accuracy during the sliding process, and by limiting the degree of freedom of the sliding rod 33, the motion groove 32 helps to reduce unnecessary vibration or offset, thereby improving the stability of the system and the consistency of work, and according to different materials and designs, the sliding rod 33 and the motion groove 32 can withstand higher radial and axial loads, and the adaptability of the two is strong, and the shape of the motion groove 32 can be adjusted according to specific needs, such as the arc motion trajectory in the present application. In addition, by changing the cross-sectional shape of the sliding rod 33, its performance characteristics can be further customized. Since the length of the motion groove 32 is relatively long, at least longer than the length of a semi-arc rack 27, the length is sufficient to support the movement of the arc rack 27. Moreover, since the motion groove 32 is arranged inside the shaft sleeve 2, the motion groove 32 is also arranged in an arc shape as a whole.

[0049] The arc-shaped rack 27 is located above the arc-shaped groove 26, and the curved rod 28 is fixedly connected to the bottom wall of the arc-shaped rack 27. The curved rod 28 is "L"-shaped, and the telescopic rod 25 is against the side wall of the curved rod 28. The curved rod 28 can be set as a magnet, and the telescopic rod 25 can be set as a magnetic metal, so that the curved rod 28 and the telescopic rod 25 always maintain an adsorbed and fitted state, which makes it convenient for the staff to rotate the protective cover 31 to a position that does not affect the rotation of the drive rod 9.

[0050] The rotating rod 30 passes through the side wall of the sleeve 2, and one end of the rotating rod 30 is fixedly connected to the rotating gear 29, and the rotating gear 29 is meshed with the arc-shaped rack 27. The protective cover 31 is fixedly connected to the end of the rotating rod 30 away from the rotating gear 29, and the protective cover 31 is located in front of the rotating hole 12. The size of the protective cover 31 is larger than the aperture of the rotating hole 12. The inner wall of the protective cover 31 is designed for magnetic attraction, and the rotating hole 12 is made of magnetic metal. When the telescopic rod 25 moves with the double-sided gear ring 7, it will resist the curved rod 28 and drive the arc-shaped rack 27 to move together, so that the rotating gear 29 drives the rotating rod 30 and the protective cover 31 to rotate, thereby driving the protective cover 31 to the position below the rotating hole 12. Since the staff also need to rotate the drive rod 9 through the rotating hole 12, the protective cover 31 will not move to the position of the rotating hole 12 to affect the staff.

[0051] The working principle of this embodiment is as follows. When the sealing assembly needs to be disassembled for maintenance, the protective cover 31 is first rotated out of the rotating hole 12 so that the protective cover 31 leaves the rotating hole 12. The protective cover 31 rotating around the rotating rod 30 drives the rotating rod 30 to rotate. The rotation of the rotating rod 30 drives the rotating gear 29 to rotate, thereby causing the arc-shaped rack 27 to move along the motion groove 32, and finally causing the curved rod 28 to abut against the side wall of the telescopic rod 25, so that the staff can use tools to insert the rotating hole 12, so that the driving rod 9 is driven to rotate. The rotation of the driving rod 9 will cause the top gear 10 to rotate, and the double-sided gear ring 7 meshing with the top gear 10 will rotate on the supporting ring 6. The rotation of the double-sided gear ring 7 will drive the two bottom gears 15 to rotate, and the rotation of the bottom gear 15 will drive the lower rotating ring 16 to rotate. Therefore, the internal thread 22 inside the lower rotating ring 16 will cause the extension rod 17 to move inward. Under the action of the slot 24 on the inner wall of the stabilizing ring 19, the extension rod 17 will move along the axial direction of the lower rotating ring 16, so that the extension rod 17 will be separated from the fixing hole 11.

[0052] At the same time, with the rotation of the double-sided gear ring 7, the telescopic rod 25 fixed on the side wall of the double-sided gear ring 7 will slide in the arc groove 26. The movement of the telescopic rod 25 will cause the curved rod 28 to drive the arc-shaped rack 27 to move along the motion groove 32. When the telescopic rod 25 moves to the end of the arc groove 26, the slope block 34 will gradually push the telescopic rod 25 out of the arc groove 26, and then the staff can remove the dynamic ring sealing ring 1 from the shaft sleeve 2. The spherical telescopic rod 25 will be squeezed and retracted by the arc-shaped rack 27, thereby not affecting the staff's removal of the dynamic ring sealing ring 1.

[0053] If you want to reinstall the dynamic ring seal 1 after the overhaul is completed, you only need to align the driving rod 9 of the dynamic ring seal 1 with the position of the rotating hole 12 and insert it back into the shaft sleeve 2, and then use a tool to pass through the rotating hole 12 to rotate the driving rod 9, so that the driving rod 9 drives the top gear 10 to rotate in the opposite direction, and then the double-sided gear ring 7 meshing with the top gear 10 will also rotate in the opposite direction on the support ring 6, and the rotation of the double-sided gear ring 7 will drive the two bottom gears 15 to rotate, and the rotation of the bottom gear 15 will drive the lower rotating ring 16 to rotate, so that the internal thread 22 inside the lower rotating ring 16 will make the extension rod 17 move outward, and then insert it back into the fixing hole 11, so that the dynamic ring seal 1 and the shaft sleeve 2 are connected together, and then the staff manually rotates the protective cover 31. When the protective cover 31 is re-adsorbed onto the rotating hole 12, you will feel that the curved rod 28 is against the side wall of the telescopic rod 25 again, which is convenient for the next disassembly and overhaul.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A circulating pump mechanical seal assembly, comprising a dynamic ring seal (1), a shaft sleeve (2) and a static ring seal (3), wherein one end of the dynamic ring seal (1) and one end of the static ring seal (3) are both located inside the shaft sleeve (2), and characterized in that: The side wall of the dynamic ring seal (1) is provided with an annular cavity, an upper fixing ring (4) and a lower fixing ring (5) are installed in the annular cavity, the bottom wall of the upper fixing ring (4) and the top wall of the lower fixing ring (5) are fixedly connected with a support ring (6), a double-sided gear ring (7) is slidably connected between the two support rings (6), a through hole (8) is provided on the side wall of the annular cavity, a driving rod (9) is installed in the through hole (8), and the side wall of the driving rod (9) away from the through hole (8) is fixedly connected with a top gear (1 0), the top gear (10) meshes with the upper end of the double-sided gear ring (7), and two protrusion mechanisms for fixing the position of the dynamic ring seal (1) are also installed in the annular cavity, and the protrusion mechanisms include a bottom gear (15), a lower rotating ring (16), an extension rod (17), an arc rod (18), a stabilizing ring (19) and two side rods (20), and the top wall of the lower fixed ring (5) is provided with two lower placement grooves (21), and the lower rotating ring (16) is rotatably connected to the inner wall of the lower placement groove (21). The inner wall of the lower rotating ring (16) is provided with an internal thread (22), one end of the extension rod (17) is provided with a thread groove (23), the internal thread (22) is threadedly connected to the thread groove (23), the side wall of the bottom gear (15) is fixedly connected to the side wall of the lower rotating ring (16), the bottom gear (15) is meshed with the lower end of the double-sided gear ring (7), the two side rods (20) are respectively fixedly connected to the side walls of the extension rod (17) at one end away from the thread groove (23), and the arc rod (1 8) is fixedly connected to the top wall of the lower fixing ring (5), the stabilizing ring (19) is fixedly arranged in the arc-shaped rod (18), the extension rod (17) passes through the stabilizing ring (19), the inner wall of the stabilizing ring (19) is provided with two slots (24), the two side rods (20) are respectively slidably connected to the inner walls of the two slots (24), the positions of the two extension rods (17) correspond to the positions of the two fixing holes (11), and the outer diameter of the extension rod (17) is consistent with the hole diameter of the fixing hole (11); A telescopic rod (25) is fixedly connected to the side wall of the double-sided gear ring (7); the end of the telescopic rod (25) away from the double-sided gear ring (7) is spherical in design; an arc groove (26) is formed on the inner wall of the shaft sleeve (2); and the end of the telescopic rod (25) away from the double-sided gear ring (7) is slidably connected to the inner wall of the arc groove (26); The inner wall of the shaft sleeve (2) is provided with fixing holes (11) at both ends, and the heights of the two fixing holes (11) are consistent. The side wall of the shaft sleeve (2) is provided with a rotating hole (12), and the position of the rotating hole (12) corresponds to the position of the through hole (8). The inner wall of the shaft sleeve (2) is provided with a protection mechanism for protecting the rotating hole (12), and the protection mechanism comprises an arc-shaped rack (27), a curved rod (28), a rotating gear (29), a rotating rod (30) and a protection cover (31). The arc-shaped rack (27) is slidably connected to the inner wall of the shaft sleeve (2), the arc-shaped rack (27) is located above the arc-shaped groove (26), and the curved rod (28) is fixedly connected to the arc-shaped groove (26). The bottom wall of the rack (27), the curved rod (28) is "L"-shaped, the telescopic rod (25) abuts against the side wall of the curved rod (28), the rotating rod (30) passes through the side wall of the shaft sleeve (2), one end of the rotating rod (30) is fixedly connected to the rotating gear (29), the rotating gear (29) is meshed with the arc-shaped rack (27), the protective cover (31) is fixedly connected to the end of the rotating rod (30) away from the rotating gear (29), the protective cover (31) is located in front of the rotating hole (12), the size of the protective cover (31) is larger than the aperture of the rotating hole (12), the inner wall of the protective cover (31) is designed for magnetic attraction, and the rotating hole (12) is made of magnetic metal material.

2. The circulation pump mechanical seal assembly according to claim 1, characterized in that: An upper placement groove (13) is formed on the bottom wall of the upper fixed ring (4), an upper rotating ring (14) is rotatably connected in the upper placement groove (13), and the driving rod (9) is fixedly connected to the inner wall of the upper rotating ring (14).

3. The circulating pump mechanical seal assembly according to claim 1, characterized in that: The two extension rods (17) are located on the same straight line, and the angle between the position of the driving rod (9) and the straight line where the two extension rods (17) are located is 90°.

4. The circulation pump mechanical seal assembly according to claim 1, characterized in that: The arc-shaped rod (18) is divided into two sections. The two sections of the arc-shaped rod (18) are respectively fixedly connected to the top wall of the lower fixed ring (5). The stabilizing ring (19) is fixedly connected to the side wall of one end of the two sections of the arc-shaped rod (18) away from the lower fixed ring (5). The center position of the stabilizing ring (19) is opposite to the center position of the lower rotating ring (16).

5. The circulation pump mechanical seal assembly according to claim 1, characterized in that: The inner wall of the shaft sleeve (2) is provided with a movement groove (32), the side wall of the arc-shaped rack (27) is fixedly connected with a sliding rod (33), and the sliding rod (33) is slidably connected to the inner wall of the movement groove (32).

6. The circulation pump mechanical seal assembly according to claim 1, characterized in that: A sloped block (34) is fixedly connected in the arc-shaped groove (26), the height of the sloped block (34) is greater than the depth of the arc-shaped groove (26), and one end of the sloped block (34) facing the curved rod (28) is a curved slope.

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