Double-end-face mechanical seal structure of high-pressure centrifugal pump

Abstract

The utility model discloses a double-end-face mechanical seal structure of a high-pressure centrifugal pump, which comprises a device main body and a sealing mechanism, and one end of the device main body is provided with a double-end-face flange; the sealing mechanisms are arranged at the two ends of the double-end-face flange and used for positioning installation. The sealing mechanism comprises a threaded piece, a positioning ring is installed at the upper end of the threaded piece, and a sleeve is arranged on the outer side of the threaded piece in a sleeving mode. According to the double-end-face mechanical seal structure of the high-pressure centrifugal pump, the sealing mechanisms are installed at the two ends of the double-end-face flange, and the effects that positioning, dismounting and sealing are convenient, and the service life of a device is prolonged through internal filtering are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure centrifugal pumps, and in particular to a double-end face mechanical seal structure of a high-pressure centrifugal pump. Background Art

[0002] A high-pressure centrifugal pump is a type of pump that uses the rotation of the impeller to generate centrifugal force, thereby transporting liquid from a low-pressure area to a high-pressure area. Its working principle is: when the impeller rotates in the pump casing, the liquid is thrown to the surroundings, forming high-pressure liquid, which is discharged through the outlet of the pump casing. At the same time, a low-pressure area is formed in the center of the impeller, attracting new liquid into the pump, forming a continuous liquid transportation process. The high-pressure centrifugal pump will transport liquid through a double-end pipe. Both ends of the high-pressure centrifugal pump are equipped with a mechanical seal structure. Compared with a single-end mechanical seal, the double-end mechanical seal has a more complex structure, requiring higher manufacturing costs and more sophisticated installation and maintenance.

[0003] While double-face mechanical seals offer increased reliability and safety in high-pressure centrifugal pumps, their complex structure and long-term operation under harsh conditions such as high pressure and high speed can lead to a gradual deterioration in sealing effectiveness due to wear and aging of components such as the sealing ring and static ring. During operation, the medium may contain impurities such as solid particles and polymers. If these impurities are not effectively filtered, they may enter the mechanical seal and cause blockage or wear. In particular, if impurities, coke, polymers, etc. are not cleaned from the sealing end faces, the friction pair may adhere and tear the sealing surface, further deteriorating the sealing effect. The disassembly and maintenance of double-face mechanical seals are relatively complex and require specialized skills and tools. Failure to properly mark and record the position and status of each component during disassembly can make accurate positioning difficult during installation. Furthermore, during installation, double-face mechanical seals can be difficult to locate and install when disassembling, overhauling, or replacing the seal ring. Uneven tightening of the screw or failure to meet the specified torque can easily create gaps when tightening the flange. Utility Model Content

[0004] The utility model aims to solve the deficiencies in the prior art and provides a double-end mechanical seal structure for a high-pressure centrifugal pump, which is convenient for positioning and disassembling the seal and has internal filtration to extend the mechanical seal effect.

[0005] In order to solve the problem of the application of the above-mentioned traditional double-end mechanical seal in high-pressure centrifugal pumps, during the installation process of the double-end mechanical seal, it is difficult to position and install the sealing ring when disassembling, repairing and replacing it. If the screw is tightened unevenly or the specified torque is not reached, a gap is easily generated when the flange is tightened by the screw. The utility model solves this problem through the following technical solution.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A high-pressure centrifugal pump double-end mechanical seal structure, comprising:

[0008] A device body, one end of which is provided with a double-end flange;

[0009] The sealing mechanism is arranged at both ends of the double-end flange for positioning and installation; the sealing mechanism includes a threaded part, a positioning ring is installed on the upper end of the threaded part, and a sleeve is provided on the outer side of the threaded part.

[0010] Preferably, a liquid passage tube is installed inside the sleeve, and a filter is inserted into the liquid passage tube.

[0011] Preferably, magnetic blocks are installed at both ends of the filter element, and a suction groove is provided on the inner wall of the liquid passage.

[0012] Preferably, the magnetic blocks are installed in several groups, and the outer surfaces of the magnetic blocks are tightly fitted with the suction grooves.

[0013] Preferably, a sealing ring is provided on the outer side of the liquid passage tube, and the sealing ring is made of rubber material.

[0014] Preferably, an external flange is installed on the outside of the sleeve, and four groups of thread grooves are opened inside the external flange.

[0015] Preferably, the outer surface of the liquid passage is provided with threads.

[0016] Preferably, the outer surface of the liquid passage is in contact with the inner wall of the threaded member.

[0017] Preferably, the outer surface of the filter element is in contact with the inner wall of the liquid passage.

[0018] Preferably, the outer surface of the threaded member is threadedly connected to the inner wall of the sleeve.

[0019] Compared with the prior art, the present invention has the following beneficial effects: a double-face flange is installed at one end of the device body, and the liquid is transported through the pipeline connected to the double-face flange. A sealing mechanism is installed at both ends of the double-face flange, and a threaded part is installed at both ends of the double-face flange. A positioning ring is installed at the upper end of the threaded part, and the positioning ring is made of magnet material. The filter is installed inside the liquid pipe through a quick guide connection with the inside of the casing through adsorption, and solid particles, polymers and other impurities are effectively filtered, thereby reducing adhesion. The outer thread shape of the threaded part is tightened with the inner wall thread of the casing to achieve a preliminary sealing effect. After the preliminary positioning and connection, the screw is screwed in and connected to the double-face flange through the four sets of thread grooves opened in the external flange, and a secondary sealing effect is achieved by surrounding the outside, which makes it easy to position and disassemble the seal, and the internal filtration extends the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the device structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the device of the utility model when viewed from above;

[0023] Figure 3 For this utility model Figure 2 A schematic diagram of the structure at point A in the middle;

[0024] Figure 4 For this utility model Figure 1 A magnified schematic diagram of the structure at point B.

[0025] Explanation of the figure numbers: 1. Device body; 2. Double-end flange; 3. Sealing mechanism; 31. Threaded part; 32. Positioning ring; 33. Sleeve; 34. Liquid pipe; 35. Filter element; 36. Magnetic block; 37. Suction groove; 38. Sealing ring; 39. External flange. DETAILED DESCRIPTION

[0026] The present invention is described in further detail below with reference to the accompanying drawings.

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0029] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0030] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a double-end face mechanical seal structure of a high-pressure centrifugal pump includes: a device body 1 and a sealing mechanism 3, a double-end face flange 2 is installed at one end of the device body 1; the double-end face flange 2 is installed at one end of the device body 1, and the liquid is transported through a pipeline connected to the double-end face flange 2, and the sealing mechanism 3 is arranged at both ends of the double-end face flange 2 for positioning and installation; the sealing mechanism 3 includes a threaded member 31, a positioning ring 32 is installed at the upper end of the threaded member 31, and a sleeve 33 is sleeved on the outer side of the threaded member 31, the threaded member 31 is installed through both ends of the double-end face flange 2, and the positioning ring 32 is installed at the upper end of the threaded member 31, the positioning ring 32 is set to a magnetic material, and is quickly guided and connected by adsorption with the inside of the sleeve 33.

[0031] Preferably, a liquid tube 34 is installed inside the sleeve 33, and a filter element 35 is inserted inside the liquid tube 34. Magnetic blocks 36 are installed at both ends of the filter element 35. A suction groove 37 is provided on the inner wall of the liquid tube 34. Several groups of magnetic blocks 36 are installed. The outer surface of the magnetic blocks 36 fits tightly with the suction groove 37. The liquid tube 34 is installed inside the sleeve 33, and the inside of the liquid tube 34 is adsorbed and inserted into the suction groove 37 by the magnetic blocks 36. The filter element 35 is installed inside the liquid tube 34 to effectively filter impurities such as solid particles and polymers, thereby reducing adhesion. A rubber sealing ring 38 is installed on the outside of the liquid tube 34 so that it is screwed into the inner wall of the threaded part 31 through the liquid tube 34 to deform it and fit tightly.

[0032] Among them, a sealing ring 38 is sleeved on the outside of the liquid pipe 34, and the sealing ring 38 is set to a rubber material. An external flange 39 is installed on the outside of the sleeve 33, and four groups of threaded grooves are opened inside the external flange 39. A sealing ring 38 made of rubber material is installed on the outside of the liquid pipe 34, so that it is screwed into the inner wall of the threaded part 31 through the liquid pipe 34 to make it tightly fit after deformation. The outer thread shape of the threaded part 31 is tightened with the inner wall thread of the sleeve 33 to achieve a preliminary sealing effect. After the preliminary positioning and connection, the screw is screwed in through the four groups of threaded grooves opened in the external flange 39 to connect with the double-end flange 2, and the outer side is surrounded to achieve a secondary sealing effect.

[0033] It can be known that the outer surface of the liquid passage pipe 34 is provided with threads, the outer surface of the liquid passage pipe 34 is matched with the inner wall of the threaded part 31, the outer surface of the filter part 35 is matched with the inner wall of the liquid passage pipe 34, the outer surface of the threaded part 31 is threadedly connected with the inner wall of the sleeve 33, the filter part 35 is installed in the inside of the liquid passage pipe 34, and solid particles, polymers and other impurities are filtered, so that adhesion is reduced, the sealing ring 38 made of rubber is installed on the outside of the liquid passage pipe 34, the liquid passage pipe 34 is screwed into the inner wall of the threaded part 31 to tightly match after the inner wall of the threaded part 31 is deformed, the threaded shape of the outer side of the threaded part 31 is threadedly screwed with the inner wall of the sleeve 33, and a preliminary sealing effect is achieved.

[0034] It can be known that the double-end flange 2 is installed at one end of the device body 1, the pipeline is connected to convey liquid through the double-end flange 2, the sealing mechanism 3 is installed at both ends of the double-end flange 2, the threaded part 31 is installed at both ends of the double-end flange 2, the positioning ring 32 is installed at the upper end of the threaded part 31, the positioning ring 32 is made of magnet material, the inside of the sleeve 33 is connected through quick guidance adsorption, the liquid passage pipe 34 is installed in the inside of the sleeve 33, the filter part 35 is installed in the inside of the liquid passage pipe 34, solid particles, polymers and other impurities are filtered, so that adhesion is reduced, the sealing ring 38 made of rubber is installed on the outside of the liquid passage pipe 34, the liquid passage pipe 34 is screwed into the inner wall of the threaded part 31 to tightly match after the inner wall of the threaded part 31 is deformed, the threaded shape of the outer side of the threaded part 31 is threadedly screwed with the inner wall of the sleeve 33, and a preliminary sealing effect is achieved, after preliminary positioning and connection, the four groups of threaded grooves in the external flange 39 are screwed into the screw rod connected with the double-end flange 2 to realize secondary sealing effect through outside surrounding, positioning and dismounting sealing are facilitated, and the service life of the internal filtering extension device is prolonged.

[0035] Those skilled in the art should understand that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be deformed or modified without departing from the principle.

Claims

1. A high-pressure centrifugal pump double-end mechanical seal structure, characterized in that: include: A device body (1), wherein a double-end flange (2) is mounted on one end of the device body (1); A sealing mechanism (3) is provided at both ends of the double-end flange (2) for positioning and installation; the sealing mechanism (3) comprises a threaded member (31), a positioning ring (32) is installed at the upper end of the threaded member (31), and a sleeve (33) is sleeved on the outer side of the threaded member (31).

2. A high-pressure centrifugal pump double-end mechanical seal structure according to claim 1, characterized in that: A liquid passage tube (34) is installed inside the sleeve (33), and a filter element (35) is inserted into the liquid passage tube (34).

3. A high-pressure centrifugal pump double-end mechanical seal structure according to claim 2, characterized in that: Magnetic blocks (36) are installed at both ends of the filter element (35), and a suction groove (37) is provided on the inner wall of the liquid passage tube (34).

4. A high-pressure centrifugal pump double-end mechanical seal structure according to claim 3, characterized in that: The magnetic blocks (36) are installed in a plurality of groups, and the outer surfaces of the magnetic blocks (36) are tightly fitted with the suction grooves (37).

5. A high-pressure centrifugal pump double-end mechanical seal structure according to claim 4, characterized in that: A sealing ring (38) is sleeved on the outer side of the liquid passage tube (34), and the sealing ring (38) is made of rubber material.

6. A high-pressure centrifugal pump double-end mechanical seal structure according to claim 5, characterized in that: An external flange (39) is installed on the outside of the sleeve (33), and four groups of thread grooves are opened inside the external flange (39).

7. A high-pressure centrifugal pump double-end mechanical seal structure according to claim 6, characterized in that: The outer surface of the liquid passage tube (34) is provided with threads.

8. The double-end mechanical seal structure of a high-pressure centrifugal pump according to claim 7, characterized in that: The outer surface of the liquid passage (34) is in contact with the inner wall of the threaded member (31).

9. The double-end mechanical seal structure of a high-pressure centrifugal pump according to claim 8, characterized in that: The outer surface of the filter element (35) is in contact with the inner wall of the liquid passage tube (34).

10. A high-pressure centrifugal pump double-end mechanical seal structure according to claim 9, characterized in that: The outer surface of the threaded member (31) is threadedly connected to the inner wall of the sleeve (33).

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