Corrosion-resistant metal magnetic drive pump mechanical seal

Abstract

The utility model relates to the technical field of magnetic drive pump mechanical seals, in particular to a corrosion-resistant metal magnetic drive pump mechanical seal which comprises a main shaft, a mechanical seal mechanism, a sealing sleeve, a sealing cover and a pump shell, the mechanical seal mechanism is sleeved on the outer side of the main shaft, the sealing sleeve is sleeved on the outer side of the mechanical seal mechanism, one side of the sealing sleeve is clamped with the sealing cover through a positioning mechanism, and the other side of the sealing sleeve is clamped with the pump shell. One side of the sealing cover is connected with the pump shell in a clamped mode through a mounting mechanism, the positioning mechanism comprises a positioning assembly and a clamping assembly, the clamping assembly comprises two sets of movable rods, and adjusting grooves are formed in the two ends of one side of the sealing sleeve. The positioning mechanism and the mounting mechanism are simple in structure and convenient to operate, the bolts do not need to be rotated one by one, mounting and dismounting can be completed only by pressing and rotating one by one, and the dismounting and mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic pump seals, in particular to a corrosion-resistant metal magnetic pump seal. Background Art

[0002] Mechanical seal is a shaft sealing device for rotating machinery, usually used in magnetic pumps, chemical pumps, centrifugal pumps, centrifuges, reactors and compressors. Since the transmission shaft runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment. The medium in the equipment leaks out through the gap. If the pressure inside the equipment is lower than the atmospheric pressure, air will leak into the equipment. Mechanical seal can improve the sealing effect. However, when the sealing structure fails, the sealing effect deteriorates, which may cause leakage. The mechanical seal structure needs to be replaced in time. However, the mechanical seal structure inside the pump in the prior art is relatively complex and inconvenient to disassemble and assemble, which needs to be improved.

[0003] In order to solve the above technical problems, a Chinese patent with announcement number CN215719765U in the prior art discloses a chemical pump with an easy-to-replace mechanical seal structure, comprising a base, a motor and a pump casing are installed on the upper surface of the base, the motor is connected to a main shaft, an impeller is connected to the end of the main shaft, a docking ring is provided on the left wall of the pump casing, the docking ring is connected to a sealing cover, and a mechanical seal assembly that is easy to disassemble and assemble is installed on the main shaft.

[0004] Although the above-mentioned prior art solution can utilize the first bolt and the second bolt to disassemble the mechanical seal component, it is necessary to twist and rotate each group of bolts one by one to disengage them from the threaded holes during disassembly and assembly, which is not convenient and affects the disassembly and assembly efficiency. Utility Model Content

[0005] The utility model aims to provide a corrosion-resistant metal magnetic pump seal to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A corrosion-resistant metal magnetic pump seal comprises a main shaft, a seal mechanism, a sealing sleeve, a sealing cover and a pump casing, wherein the main shaft is sleeved with a seal mechanism on the outside, the seal mechanism is sleeved with a sealing sleeve on the outside, one side of the seal sleeve is clamped with the sealing cover through a positioning mechanism, one side of the sealing cover is clamped with the pump casing through an installation mechanism, the positioning mechanism comprises a positioning assembly and a clamping assembly, the clamping assembly comprises two groups of movable rods, adjustment grooves are provided at both ends of one side of the sealing sleeve, the two groups of movable rods are slidably connected to the inside of the sealing sleeve, a positioning block is installed at one end of the movable rod extending to the outside of the sealing sleeve, a clamping block is sleeved on the outside of the movable rod, a pull ring is installed at one end of the movable rod extending to the inside of the adjustment groove, and the installation mechanism The structure includes a docking component and a locking component, a movable groove is opened inside the sealing sleeve and located on the outside of the movable rod, a movable disk slidably connected to the movable groove is installed on the outside of the movable rod, the positioning component includes a rotating disk, mounting grooves are opened at both ends of the inner part of the cover, the inner side of the mounting groove is rotatably connected with a rotating disk, two groups of first springs are arranged and installed on one side of the rotating disk, a fixed disk is installed at one end of the two groups of first springs, a positioning groove is opened at one end of the fixed disk and is engaged with the positioning block, a card slot is opened on one side of the mounting groove and is engaged with the card block, a docking groove is opened on one side of the card slot, and the length and width of the docking groove are both greater than the length and width of the card block.

[0008] As a preferred solution of the utility model, the docking assembly includes two groups of sliding columns, sliding grooves extending to the inside of the pump casing are provided at both ends of the interior of the cover, the two groups of sliding columns are slidably connected to the inner sides of the sliding grooves on both sides, and moving grooves are provided at both ends of the sliding grooves inside the cover, a second spring is installed on the inner side of the moving groove, a moving block slidably connected to the moving groove is installed at one end of the second spring, a positioning ring is installed between the moving blocks at both ends, the sliding column is rotatably connected to the inner side of the positioning ring, and a torsion plate is installed at one end of the sliding column.

[0009] As a preferred solution of the utility model, the locking assembly includes a limit block, and the cover is provided with a first limit groove extending into the pump casing on both sides of one end of the sliding groove, and the pump casing is provided with a rotation groove on one side of the first limit groove, the first limit groove is longitudinally opened, and the pump casing is provided with a second limit groove transversely at both ends of the sliding groove corresponding to the first limit groove.

[0010] As a preferred solution of the utility model, sealing rings are embedded and installed at the joints between the two ends of the sealing cover and the sealing sleeve.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, after the sealing sleeve is sleeved on the outside of the mechanical sealing mechanism, the clamping blocks at both ends are aligned with the docking grooves and clamped in, so that the positioning block is engaged and connected with the positioning groove, and then the pull ring is buckled to push the movable rod inward, and the movable disk and the movable groove can be used to squeeze the fixed disk and the first spring, and then the positioning block, the positioning groove and the rotating disk are rotated to rotate to the horizontal direction, and then the handle is released to complete the fixation. When disassembling, it is only necessary to press the pull ring again to push the movable rod to squeeze the fixed disk, and the clamping block can be pulled out from the docking groove after being rotated to the longitudinal direction and released to complete the disassembly.

[0013] 2. In the utility model, the sealing cover is attached to one side of the pump casing, and then the torsion plate is pinched and pressed inwardly, and the second spring is squeezed by the positioning ring and the moving block, so that the limit block moves inside the first limit groove, and the sliding column is moved to the inside of the pump casing, so that the limit block moves from the inside of the first limit groove to the inside of the rotation groove, and then the sliding column is rotated to align the limit block with the second limit groove opened laterally, and then the second spring of the torsion plate is released to cooperate with the moving block and the positioning ring to drive the sliding column to rebound and complete the engagement. When disassembling, only the above steps need to be reversed to complete the disassembly. The positioning mechanism and the installation mechanism have a simple structure and are easy to operate. There is no need to rotate each set of bolts one by one. Only one press and one turn are required to complete the installation and disassembly, thereby improving the efficiency of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a three-dimensional cross-sectional structural diagram of the installation mechanism of the utility model;

[0016] Figure 3 For this utility model Figure 1 Schematic diagram of the cross-sectional structure of part A.

[0017] In the figure: 1. main shaft; 2. mechanical sealing mechanism; 3. sealing sleeve; 4. sealing cover; 5. pump casing; 6. movable rod; 7. clamping block; 8. pull ring; 9. movable groove; 10. movable disk; 11. rotating disk; 12. first spring; 13. fixed disk; 14. positioning groove; 15. clamping groove; 16. docking groove; 17. sliding column; 18. movable groove; 19. second spring; 20. movable block; 21. positioning ring; 22. limit block; 23. first limit groove; 24. rotating groove; 25. sealing ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] Example:

[0020] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0021] A corrosion-resistant metal magnetic pump seal comprises a main shaft 1, a seal mechanism 2, a sealing sleeve 3, a sealing cover 4 and a pump casing 5. The main shaft 1 is sleeved with the seal mechanism 2 on the outside, the seal mechanism 2 is sleeved with the sealing sleeve 3 on the outside, one side of the sealing sleeve 3 is clamped with the sealing cover 4 through a positioning mechanism, and one side of the sealing cover 4 is clamped with the pump casing 5 through a mounting mechanism.

[0022] The mechanical seal mechanism 2 comprises a shaft sleeve, a dynamic ring, a first sealing groove, a first sealing ring, a connecting column, a static ring, a sliding bar, a sealing sleeve, a sliding groove, a first bolt, a second sealing groove, a spring and a second sealing ring.

[0023] The specific working principles of the above-mentioned main shaft 1, mechanical seal mechanism 2, sealing sleeve 3, sealing cover 4 and pump casing 5 have been described in detail in the comparative document announcement number CN215719765U, a chemical pump with an easy replacement mechanical seal structure, so they will not be repeated in this solution.

[0024] The positioning mechanism includes a positioning component and a clamping component. The clamping component includes two groups of movable rods 6. Adjustment grooves are provided at both ends of one side of the sealing sleeve 3. The two groups of movable rods 6 are slidably connected to the inside of the sealing sleeve 3. A positioning block is installed at one end of the movable rod 6 extending to the outside of the sealing sleeve 3. A clamping block 7 is sleeved on the outside of the movable rod 6. A pull ring 8 is installed at one end of the movable rod 6 extending to the inside of the adjusting groove. The installation mechanism includes a docking component and a locking component. A movable groove 9 is provided inside the sealing sleeve 3 on the outside of the movable rod 6. A movable disk 10 slidably connected to the movable groove 9 is installed on the outside of the movable rod 6. When the machine seal is in use, the sealing sleeve 3 can be sleeved on the outside of the machine seal mechanism, and the clamping blocks 7 at both ends are aligned with the docking groove 16 and clamped into it, so that the positioning block is clamped and connected with the positioning groove 14. Then, the pull ring 8 is buckled to push the movable rod 6 inward, and the movable disk 10 and the movable groove 9 can be used to squeeze the fixed disk 13 and the first spring 12, and the components of the machine seal mechanism are all coated with KNM22 flexible ceramic corrosion-resistant coating.

[0025] In this embodiment, if Figure 1 , Figure 2 and Figure 3As shown, the positioning assembly includes a rotating disk 11, mounting grooves are provided at both ends of the cover 4, the rotating disk 11 is rotatably connected to the inner side of the mounting grooves, two groups of first springs 12 are arranged and installed on one side of the rotating disk 11, a fixed disk 13 is installed at one end of the two groups of first springs 12, and a positioning groove 14 engaged with the positioning block is provided at one end of the fixed disk 13, a clamping groove 15 engaged with the clamping block 7 is provided on one side of the mounting groove inside the cover 4, and a docking groove 16 is provided on one side of the clamping groove 15 inside the cover 4, and the length and width of the docking groove 16 are both greater than the length and width of the clamping block 7, and then the positioning block, the positioning groove 14 and the rotating disk 11 are rotated to rotate the clamping block 7 to the horizontal direction, and then the handle is released to complete the fixation. When disassembling, just press the pull ring 8 again to push the movable rod 6 to squeeze the fixed disk 13, and then release the clamping block 7 to rotate to the longitudinal direction to pull it out of the docking groove 16 to complete the disassembly.

[0026] In this embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, the docking assembly includes two groups of sliding columns 17, and sliding grooves extending to the inside of the pump casing 5 are provided at both ends of the interior of the cover 4. The two groups of sliding columns 17 are slidably connected to the inner sides of the sliding grooves on both sides. Moving grooves 18 are provided at both ends of the sliding grooves in the interior of the cover 4, and a second spring 19 is installed on the inner side of the moving groove 18. A moving block 20 slidably connected to the moving groove 18 is installed at one end of the second spring 19. A positioning ring 21 is installed between the moving blocks 20 at both ends. The sliding column 17 is rotatably connected to the inner side of the positioning ring 21, and a torsion plate is installed at one end of the sliding column 17. By attaching the cover 4 to one side of the pump casing 5 and then pinching the torsion plate to press inward, the second spring 19 is squeezed in cooperation with the positioning ring 21 and the moving block 20, and the limit block 22 moves inside the first limit groove 23.

[0027] In this embodiment, if Figure 1 , Figure 2 and Figure 3As shown, the locking assembly includes a limit block 22, and both sides of the interior of the cover 4 at one end of the sliding groove are provided with a first limit groove 23 extending into the interior of the pump housing 5, and a rotation groove 24 is provided on one side of the first limit groove 23 inside the pump housing 5. The first limit groove 23 is longitudinally opened, and the interior of the pump housing 5 is provided with a second limit groove horizontally opened at both ends of the sliding groove corresponding to the first limit groove 23, and the two ends of the cover 4 and the sealing sleeve 3 are both embedded with a sealing ring 25. The sliding column 17 is moved into the interior of the pump housing 5, so that the limit block 22 moves from the inside of the first limit groove 23 to the inside of the rotation groove 24, and then the sliding column 17 is rotated to align the limit block 22 with the second limit groove opened horizontally, and the second spring 19 of the torsion plate is released to cooperate with the moving block 20 and the positioning ring 21 to drive the sliding column 17 to rebound and complete the engagement. When disassembling, it is only necessary to reverse the above steps to complete the disassembly. The positioning mechanism and the installation mechanism have a simple structure and are easy to operate. There is no need to rotate each group of bolts one by one. Only one press and one turn are required to complete the installation and disassembly, thereby improving the disassembly efficiency.

[0028] The implementation principle of a corrosion-resistant metal magnetic pump seal in the embodiment of the present application is as follows: when the seal is in use, the sealing sleeve 3 is sleeved on the outside of the seal mechanism, and the clamping blocks 7 at both ends are aligned with the docking grooves 16 and clamped in, so that the positioning blocks are clamped and connected with the positioning grooves 14, and then the pull ring 8 is buckled to push the movable rod 6 inward, and the movable disk 10 and the movable groove 9 can be used to squeeze the fixed disk 13 and the first spring 12, and the parts of the seal mechanism are coated with KNM22 flexible ceramic corrosion-resistant coating, and the cover 4 is attached to one side of the pump housing 5 and the torsion plate is pinched and pressed inward, and the second spring 19 is squeezed in cooperation with the positioning ring 21 and the moving block 20, The limit block 22 moves inside the first limit groove 23, moving the sliding column 17 to the inside of the pump housing 5, so that the limit block 22 moves from the inside of the first limit groove 23 to the inside of the rotation groove 24, and then the sliding column 17 is rotated to align the limit block 22 with the second limit groove opened laterally, and then the second spring 19 of the torsion plate is released to cooperate with the moving block 20 and the positioning ring 21 to drive the sliding column 17 to rebound and complete the engagement. When disassembling, you only need to reverse the above steps to complete the disassembly. The positioning mechanism and the installation mechanism have a simple structure and are easy to operate. There is no need to rotate each set of bolts one by one. Only one press and one turn are required to complete the installation and disassembly, which improves the disassembly and assembly efficiency.

[0029] 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 corrosion-resistant metal magnetic pump seal, comprising a main shaft (1), a seal mechanism (2), a sealing sleeve (3), a sealing cover (4) and a pump housing (5), wherein the main shaft (1) is sleeved with a seal mechanism (2), the seal mechanism (2) is sleeved with a sealing sleeve (3) on the outside, one side of the sealing sleeve (3) is clamped with the sealing cover (4) through a positioning mechanism, and one side of the sealing cover (4) is clamped with the pump housing (5) through a mounting mechanism, characterized in that: The positioning mechanism comprises a positioning assembly and a clamping assembly, the clamping assembly comprises two groups of movable rods (6), one end of the sealing sleeve (3) is provided with adjustment grooves at both ends, the two groups of movable rods (6) are slidably connected to the inside of the sealing sleeve (3), one end of the movable rod (6) extending to the outside of the sealing sleeve (3) is installed with a positioning block, the outside of the movable rod (6) is sleeved with a clamping block (7), and one end of the movable rod (6) extending to the inside of the adjustment groove is installed with a pull ring (8), the installation mechanism comprises a docking assembly and a locking assembly, the inside of the sealing sleeve (3) is provided with a movable groove (9) on the outside of the movable rod (6), and the outside of the movable rod (6) is installed with a movable disk (10) slidably connected to the movable groove (9), The positioning assembly comprises a rotating disk (11), both ends of the cover (4) are provided with mounting grooves, the inner sides of the mounting grooves are rotatably connected with the rotating disk (11), two groups of first springs (12) are arranged and installed on one side of the rotating disk (11), one end of the two groups of first springs (12) is provided with a fixed disk (13), one end of the fixed disk (13) is provided with a positioning groove (14) which is engaged with the positioning block, a clamping groove (15) which is engaged with the clamping block (7) is provided on one side of the mounting groove inside the cover (4), and a docking groove (16) is provided on one side of the clamping groove (15), and the length and width of the docking groove (16) are greater than the length and width of the clamping block (7).

2. A corrosion-resistant metal magnetic pump seal according to claim 1, characterized in that: The docking assembly comprises two groups of sliding columns (17), both ends of the interior of the cover (4) are provided with sliding grooves extending into the interior of the pump housing (5), the two groups of sliding columns (17) are slidably connected to the inner sides of the sliding grooves on both sides, the interior of the cover (4) is provided with moving grooves (18) at both ends of the sliding grooves, a second spring (19) is installed inside the moving groove (18), one end of the second spring (19) is provided with a moving block (20) slidably connected to the moving groove (18), a positioning ring (21) is installed between the moving blocks (20) at both ends, the sliding column (17) is rotatably connected to the inner side of the positioning ring (21), and one end of the sliding column (17) is provided with a torsion plate.

3. A corrosion-resistant metal magnetic pump seal according to claim 2, characterized in that: The locking assembly comprises a limit block (22); a first limit groove (23) extending into the pump housing (5) is provided on both sides of one end of the sliding groove inside the cover (4); a rotation groove (24) is provided on one side of the first limit groove (23) inside the pump housing (5); the first limit groove (23) is provided longitudinally; and second limit grooves are provided transversely at both ends of the sliding groove inside the pump housing (5) corresponding to the first limit groove (23).

4. The corrosion-resistant metal magnetic pump seal according to claim 1, characterized in that: Sealing rings (25) are embedded and installed at the joints between the two ends of the sealing cover (4) and the sealing sleeve (3).

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