Pump with dynamic sealing structure

Abstract

The utility model discloses a pump with a dynamic sealing structure, which comprises a pump shell, the inside of the pump shell is fixedly connected with a liquid inlet pipe, an anti-explosion electromagnetic valve is arranged on the outer side of the liquid inlet pipe, the outer side of the liquid inlet pipe is fixedly connected with a liquid discharge pipe, the inside of the pump shell is fixedly connected with a liquid outlet pipe, a check valve clack is arranged in the liquid outlet pipe, and the top of the pump shell is fixedly connected with an outer pump cover. The top of the outer pump cover is fixedly connected with the motor, the output end of the motor is fixedly connected with the output shaft, the output shaft is fixedly connected with the pump shaft, the outer side of the pump shaft is fixedly connected with the driving impeller, the outer pump cover is fixedly connected with the inner pump cover, the interior of the inner pump cover is fixedly connected with the baffle, and the outer side of the output shaft is fixedly connected with the main sealing impeller. The side face of the main sealing impeller is fixedly connected with the fins. According to the utility model, the main sealing impeller and the auxiliary sealing impeller rotate and are matched with each other, and the fins play a reverse pressure role in blocking a medium, so that the sealing effect of the pump is improved, and the elastic piece pushes the sealing plate to be attached to the inner pump cover, thereby solving the problem that the sealing effect is reduced when the pump stops.

Description

Technical Field

[0001] The utility model relates to the technical field of pump sealing, in particular to a pump with a dynamic sealing structure. Background Art

[0002] With the development of society, the use scenarios and working conditions of pumps are more complex, and the requirements for pump usability are becoming more and more stringent, among which leakage is emphasized by many customers. The sealing performance of pumps is indeed a difficult problem. The sealing performance is particularly important when conveying corrosive or toxic substances, so a dynamic seal for the pump is needed.

[0003] Existing pumps use double-end seals or external single-end mechanical seals during transportation, and are sealed with sealing gaskets. However, the effect of their use is often not ideal. In addition, the existing dynamic seal only plays a good sealing role during operation. When the pump shaft stops, the sealing effect of the pump will be reduced, posing a safety hazard. Utility Model Content

[0004] The purpose of the utility model is to provide a pump with a dynamic sealing structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pump with a dynamic sealing structure, comprising a pump casing, the interior of the pump casing is fixedly connected to a liquid inlet pipe, an explosion-proof solenoid valve is arranged on the outside of the liquid inlet pipe, the outside of the liquid inlet pipe is fixedly connected to a liquid discharge pipe, the interior of the pump casing is fixedly connected to a liquid outlet pipe, a check valve flap is arranged inside the liquid outlet pipe, the top of the pump casing is fixedly connected to an outer pump cover, the top of the outer pump cover is fixedly connected to a motor, the output end of the motor is fixedly connected to an output shaft, the output shaft is fixedly connected to a pump shaft, the outside of the pump shaft is fixedly connected to a driving impeller, the outer pump cover is fixedly connected to an inner pump cover, the inside of the inner pump cover is fixedly connected to a baffle, the outside of the output shaft is fixedly connected to a main sealing impeller, the side of the main sealing impeller is fixedly connected to a wing, the outside of the output shaft is fixedly connected to a secondary sealing impeller, the outside of the output shaft is fixedly connected to a fixed plate, the fixed plate is hinged to one end of a connecting plate, the other end of the connecting plate is hinged to a sphere, a sealing plate is arranged at the bottom of the fixed plate, and the sealing plate is fixedly connected to one end of an elastic member.

[0006] Preferably, the interior of the pump housing is communicated with a liquid inlet pipe and a liquid outlet pipe, the liquid discharge pipe is communicated with the interior of the liquid inlet pipe, and one end of the liquid discharge pipe is threadedly connected to a sealing cover.

[0007] Preferably, a gland is provided on the outer side of the driving impeller, and the inside of the pump casing is fixedly connected to the gland.

[0008] Preferably, one end of the baffle is fixedly connected to the inner wall of the inner pump cover, and the main sealing impeller is sleeved inside the inner pump cover.

[0009] Preferably, the main sealing impeller and the auxiliary sealing impeller are respectively located on both sides of the outer pump cover, and the side surfaces of the main sealing impeller and the auxiliary sealing impeller are fixedly connected to the vanes.

[0010] Preferably, the connecting plates are hinged to one end of the two spheres respectively, and the other ends of the spheres are hinged to the fixing plate and the sealing plate respectively.

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

[0012] The utility model is provided with a motor, a pump shaft, a sleeve, an inner pump cover, a baffle, a main sealing impeller, a vane and an auxiliary sealing impeller. The motor drives the pump shaft so that the main sealing impeller and the auxiliary sealing impeller are synchronously driven to rotate when the overall pump is running. The main sealing impeller, the auxiliary sealing impeller and the vane rotate to play a reverse pressure role of the sealing medium, that is, leakage of the conveying medium is prevented, and the baffle is cooperated with to prevent the conveying medium from rotating synchronously, thereby improving the sealing effect of the pump. The centrifugal force generated when the pump shaft rotates causes the ball to move outward, and the sealing plate is pulled upward by the connecting plate to avoid friction of the sealing plate during the operation of the shaft body and reduce the service life. When the pump stops running, the elastic member is used to push the sealing plate to fit with the inner pump cover, thereby solving the problem of reduced sealing effect of the dynamic sealing structure of the pump when it stops. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure in the middle;

[0015] Figure 3 It is a schematic diagram of the connection structure of the fixing plate and the sealing plate of the utility model.

[0016] In the figure: 1. pump casing; 2. liquid inlet pipe; 3. explosion-proof solenoid valve; 4. liquid discharge pipe; 5. liquid outlet pipe; 6. check valve disc; 7. outer pump cover; 8. motor; 9. output shaft; 10. pump shaft; 11. driving impeller; 12. inner pump cover; 13. baffle; 14. main sealing impeller; 15. vane; 16. auxiliary sealing impeller; 17. fixing plate; 18. connecting plate; 19. sphere; 20. sealing plate; 21. elastic member. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 The utility model provides a technical solution: a pump with a dynamic sealing structure, including a pump casing 1, the inside of the pump casing 1 is welded and fixed to a liquid inlet pipe 2, an explosion-proof solenoid valve 3 is arranged on the outside of the liquid inlet pipe 2, the outside of the liquid inlet pipe 2 is welded and fixed to a liquid discharge pipe 4, the inside of the pump casing 1 is welded and fixed to a liquid outlet pipe 5, a check valve flap 6 is arranged inside the liquid outlet pipe 5, the liquid inlet pipe 2 and the liquid outlet pipe 5 are respectively communicated with the cavity inside the pump casing 1, the liquid inlet pipe 2 and the liquid outlet pipe 5 are respectively located on both sides of the pump casing 1, the top of the pump casing 1 is connected and fixed to an outer pump cover 7 by bolts, the top of the outer pump cover 7 is welded and fixed to a motor 8, the output end of the motor 8 is welded and fixed to an output shaft 9, and a pump shaft 10 is welded to one end of the output shaft 9 The outer side of the pump shaft 10 is welded and fixed to the driving impeller 11, the driving impeller 11 is connected and fixed to the inside of the pump casing 1 through the gland, the outer pump cover 7 is welded and fixed to the inner pump cover 12, the inner pump cover 12 is welded and fixed to the baffle 13, the outer side of the output shaft 9 is welded and fixed to the main sealing impeller 14, the side of the main sealing impeller 14 is welded and fixed to the wing 15, the outer side of the output shaft 9 is welded and fixed to the auxiliary sealing impeller 16, the outer side of the output shaft 9 is welded and fixed to the fixing plate 17, the fixing plate 17 is hinged to one end of the connecting plate 18, the other end of the connecting plate 18 is hinged to the ball 19, a sealing plate 20 is arranged at the bottom of the fixing plate 17, and the sealing plate 20 is welded and fixed to one end of the elastic member 21,

[0019] The interior of the pump casing 1 is communicated with the liquid inlet pipe 2 and the liquid outlet pipe 5, the discharge pipe 4 is communicated with the interior of the liquid inlet pipe 2, one end of the discharge pipe 4 is threadedly connected to the sealing cover, a gland is arranged on the outside of the driving impeller 11, and the output shaft 9 drives the driving impeller 11 to rotate more stably through the gland, so as to avoid the noise generated by the rotation of the driving impeller 11, thereby improving the use effect of the overall pump, and at the same time, the output shaft 9 can drive the main sealing impeller 14 and the vane 15 to rotate synchronously, and the dual dynamic seal of the main sealing impeller 14 and the vane 15 is utilized to effectively enhance the sealing effect, the interior of the pump casing 1 is welded and fixed to the gland, one end of the baffle 13 is welded and fixed to the inner wall of the inner pump cover 12, the main sealing impeller 14 is sleeved inside the inner pump cover 12, the main sealing impeller 14 and the auxiliary sealing impeller 16 are respectively located on both sides of the outer pump cover 7, and the main sealing impeller 14 and the auxiliary sealing impeller 16 are respectively located on both sides of the outer pump cover 7. The sealing impeller 14 and the auxiliary sealing impeller 16 are distributed on both sides to form two pressure blocking chambers, which further prevents the conveying medium in the chamber inside the pump housing 1 from leaking from the connection between the output shaft 9 and the pump shaft 10. The sides of the main sealing impeller 14 and the auxiliary sealing impeller 16 are welded and fixed with the vanes 15. The connecting plate 18 is hinged to one end of the two spheres 19 respectively, and the other end of the sphere 19 is hinged to the fixing plate 17 and the sealing plate 20 respectively. The rotation of the main sealing impeller 14 and the auxiliary sealing impeller 16 cooperates with the vanes 15 to generate centrifugal pressure, which further blocks the conveying medium from leaking from the connection of the output shaft 9. At the same time, the cooperation between the inner pump cover 12 and the baffle 13 is used to prevent the blocking medium and the conveying medium from generating pressure as the main sealing impeller 14 rotates, thereby further promoting the dynamic sealing effect of the pump;

[0020] Working principle: When in use, the motor 8 drives the output shaft 9 and the pump shaft 10 to rotate, and the driving impeller 11 is driven to rotate so that the conveying medium enters from the liquid inlet pipe 2 and is then discharged from the liquid outlet pipe 5 to achieve the conveying effect. While the output shaft 9 is rotating, it will drive the main sealing impeller 14 and the auxiliary sealing impeller 16 to rotate synchronously. The pressure generated by the rotation of the main sealing impeller 14 and the auxiliary sealing impeller 16 is used to achieve a reverse pressure on the blocking medium, thereby preventing the conveying medium from leaking from the output shaft 9. The vane 15 is used to enhance the pressure generated by the main sealing impeller 14 and the auxiliary sealing impeller 16 to further enhance the sealing effect. The baffle 13 is used to prevent the medium from leaking with the main sealing impeller 1 4 rotate synchronously, thereby improving the sealing effect of the main sealing impeller 14 and the auxiliary sealing impeller 16. When the output shaft 9 rotates, the ball 19 moves toward the edge of the fixed plate 17 due to the centrifugal force. During the movement of the ball 19, the sealing plate 20 moves upward through the connecting plate 18 and compresses the elastic member 21. The upward movement of the sealing plate 20 can avoid the situation in which the sealing plate 20 is contacted and friction occurs during the rotation of the output shaft 9, resulting in a reduction in the service life. When the output shaft 9 stops running, the sealing plate 20 is pushed downward by the elastic force of the elastic member 21 until it is tightly fitted with the outer pump cover 7, thereby enhancing the sealing effect of the dynamic sealing structure of the pump when it stops running.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0022] 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 pump with a dynamic sealing structure, comprising a pump housing (1), characterized in that: The interior of the pump housing (1) is fixedly connected to the liquid inlet pipe (2), an explosion-proof solenoid valve (3) is arranged on the outside of the liquid inlet pipe (2), the outside of the liquid inlet pipe (2) is fixedly connected to the liquid discharge pipe (4), the interior of the pump housing (1) is fixedly connected to the liquid outlet pipe (5), a check valve flap (6) is arranged on the inside of the liquid outlet pipe (5), the top of the pump housing (1) is fixedly connected to the outer pump cover (7), the top of the outer pump cover (7) is fixedly connected to the motor (8), the output end of the motor (8) is fixedly connected to the output shaft (9), the output shaft (9) is fixedly connected to the pump shaft (10), the outside of the pump shaft (10) is fixedly connected to the driving impeller (11), the outer pump cover (7) The output shaft (9) is fixedly connected to the inner pump cover (12); the inner pump cover (12) is fixedly connected to the baffle (13); the outer side of the output shaft (9) is fixedly connected to the main sealing impeller (14); the side of the main sealing impeller (14) is fixedly connected to the vane (15); the outer side of the output shaft (9) is fixedly connected to the auxiliary sealing impeller (16); the outer side of the output shaft (9) is fixedly connected to the fixing plate (17); the fixing plate (17) is hinged to one end of the connecting plate (18); the other end of the connecting plate (18) is hinged to the ball (19); a sealing plate (20) is provided at the bottom of the fixing plate (17); the sealing plate (20) is fixedly connected to one end of the elastic member (21).

2. A pump with a dynamic sealing structure according to claim 1, characterized in that: The interior of the pump housing (1) is in communication with the liquid inlet pipe (2) and the liquid outlet pipe (5), the liquid discharge pipe (4) is in communication with the interior of the liquid inlet pipe (2), and one end of the liquid discharge pipe (4) is threadedly connected to the sealing cover.

3. A pump with a dynamic sealing structure according to claim 1, characterized in that: A gland is arranged on the outside of the driving impeller (11), and the inside of the pump casing (1) is fixedly connected to the gland.

4. A pump with a dynamic sealing structure according to claim 1, characterized in that: One end of the baffle (13) is fixedly connected to the inner wall of the inner pump cover (12), and the main sealing impeller (14) is sleeved inside the inner pump cover (12).

5. A pump with a dynamic sealing structure according to claim 1, characterized in that: The main sealing impeller (14) and the auxiliary sealing impeller (16) are respectively located on two sides of the outer pump cover (7), and the sides of the main sealing impeller (14) and the auxiliary sealing impeller (16) are fixedly connected to the vanes (15).

6. A pump with a dynamic sealing structure according to claim 1, characterized in that: The connecting plate (18) is hinged to one end of each of the two spheres (19), and the other end of each of the spheres (19) is hinged to the fixing plate (17) and the sealing plate (20).

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