Semi-open guide vane centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a semi-open type guide vane body centrifugal pump which comprises a pump body and a volute arranged on the left side of the pump body, a pump shaft is arranged on the left side of the pump body, a suction pipe is fixedly installed on the left side of the volute, an outlet pipe is fixedly arranged at the rear end of the outer side of the volute, an impeller is arranged in the volute, and a guide vane is arranged in the impeller. According to the semi-open type guide vane centrifugal pump, by means of the structural design in the sealing disassembly and assembly mechanism, the sealing ring block is in sealing contact with the protruding ring under the supporting effect of the supporting compression spring on the sealing ring block, and under eccentric rotation between the locking column and the mounting column, the sealing ring block is in sealing contact with the protruding ring. According to the centrifugal pump convenient to disassemble, the locking column can limit and fix the mounting ring block, so that the purpose of conveniently disassembling the centrifugal pump is achieved, the requirements of disassembling personnel are met, and normal operation of the centrifugal pump is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a semi-open guide vane centrifugal pump. Background Art

[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. A centrifugal pump is mainly composed of an impeller, a pump body, a pump shaft, bearings, sealing rings and a stuffing box. It is widely used in chemical industries such as petrochemicals and coal chemical industry. Its main features include compact structure, wide flow and head range, uniform flow, stable operation, low vibration and low maintenance and repair costs.

[0003] A semi-open guide vane centrifugal pump currently in use has been found through searching, for example, in a Chinese patent document with the authorization announcement number CN206268134U, which discloses a semi-open guide vane centrifugal pump. The guide vane of the centrifugal pump adopts a semi-open design, so that the lower half of the flow channel is exposed to the outside, which is convenient for processing and grinding, and removing sand inclusions, thereby effectively solving the problem of unqualified efficiency of the centrifugal pump. The design is simple and easy, without adding any parts. Due to the improvement in design, the difficulties in manufacturing are solved, and the hydraulic efficiency of the pump is improved. It has great application value, especially for medium and low specific speed centrifugal pumps with relatively curved and narrow flow channels.

[0004] Although the above patent solves the problems in the above background technology, it still has the following shortcomings: the upper and lower parts of the centrifugal pump are sealed and connected through flange connection surfaces, and this connection method is not easy to disassemble. Therefore, during maintenance, it takes a lot of disassembly time for maintenance personnel, and also increases the workload of maintenance personnel, which in turn affects the maintenance progress of maintenance personnel and is not conducive to the normal operation of the centrifugal pump.

[0005] In summary, the utility model solves the problems in the above-mentioned background technology by designing a semi-open guide vane centrifugal pump. Utility Model Content

[0006] The utility model aims to provide a semi-open guide vane centrifugal pump to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A semi-open guide vane centrifugal pump comprises a pump body and a volute arranged on the left side of the pump body, a pump shaft is arranged on the left side of the pump body, a suction pipe is fixedly installed on the left side of the volute, an outlet pipe is fixedly arranged on the rear end of the outer side of the volute, an impeller is arranged inside the volute, and a sealing disassembly mechanism is arranged between the volute and the pump body;

[0009] The sealing and disassembly mechanism includes a mounting ring block, a groove and a mounting column. The mounting ring block is fixedly mounted on the right side surface of the volute, and a convex ring and a mounting hole are respectively provided on the right side surface. The groove is opened on the left side surface of the pump body, and a supporting compression spring and a sealing ring block are respectively provided inside the groove. The mounting column is fixedly mounted on the left side surface of the pump body, and a locking column is provided on the left side thereof.

[0010] As a preferred solution of the utility model, the right end of the pump shaft movably penetrates the left side surface of the pump body and is connected to its transmission end.

[0011] As a preferred solution of the utility model, the left end of the pump shaft extends to the inner side of the impeller, and is locked and connected to the impeller via a nut.

[0012] As a preferred solution of the present utility model, the impeller is a semi-open impeller.

[0013] As a preferred solution of the utility model, one end of the support compression spring is fixed to the inner wall of the groove, and the other end thereof is fixed to the right side surface of the sealing ring block.

[0014] As a preferred solution of the utility model, the outer surface of the convex ring slides in contact with the inner wall of the groove.

[0015] As a preferred solution of the utility model, the left inner wall of the mounting hole extends to the left surface of the mounting ring block, and is symmetrically distributed front to back with respect to the outer surface of the mounting ring block. The mounting column and the mounting hole are correspondingly matched, and the locking column is eccentrically connected to the left surface of the mounting column through a rotating shaft.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] In the utility model, a semi-open guide vane centrifugal pump is provided, thereby utilizing the structural design in the sealing disassembly and assembly mechanism. Under the support of the supporting compression spring on the sealing ring block, the sealing ring block and the convex ring form a sealing contact. Under the eccentric rotation between the locking column and the mounting column, the locking column realizes the limiting fixation of the mounting ring block, thereby achieving the purpose of convenient disassembly of the centrifugal pump, meeting the needs of the disassembly personnel, and being conducive to the normal operation of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial structural schematic diagram of the centrifugal pump of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the utility model when the mounting ring block and the convex ring are separated;

[0021] Figure 4 It is a schematic diagram of the partial exploded structure of the seal disassembly mechanism of the utility model.

[0022] In the figure: 1. pump body; 2. volute; 201. suction pipe; 202. outlet pipe; 203. impeller; 3. pump shaft; 4. sealing disassembly and assembly mechanism; 401. mounting ring block; 402. groove; 403. mounting column; 404. convex ring; 405. mounting hole; 406. supporting compression spring; 407. sealing ring block; 408. locking column. DETAILED DESCRIPTION

[0023] 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.

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0027] For examples, see Figure 1-4 , the utility model provides a technical solution:

[0028] A semi-open guide vane centrifugal pump comprises a pump body 1 and a volute 2 arranged on the left side of the pump body 1, a pump shaft 3 is arranged on the left side of the pump body 1, a suction pipe 201 is fixedly installed on the left side of the volute 2, an outlet pipe 202 is fixedly arranged on the outer rear end of the volute 2, an impeller 203 is arranged inside the volute 2, and a sealing disassembly mechanism 4 is arranged between the volute 2 and the pump body 1;

[0029] Specifically, the right end of the pump shaft 3 movably penetrates the left surface of the pump body 1 and is connected to its transmission end, and the left end of the pump shaft 3 extends to the inner side of the impeller 203 and is locked and connected to the impeller 203 through a nut;

[0030] In this embodiment, the arrangement of the pump shaft 3 mainly facilitates the pump body 1 to drive the impeller 203, thereby realizing the operation of the centrifugal pump.

[0031] It should be noted that the impeller 203 is a semi-open impeller.

[0032] In this embodiment, please refer to Figure 1 , Figure 3 and Figure 4 The sealing disassembly mechanism 4 includes a mounting ring block 401, a groove 402 and a mounting column 403. The mounting ring block 401 is fixedly mounted on the right side surface of the volute 2, and a convex ring 404 and a mounting hole 405 are respectively provided on the right side surface thereof. The groove 402 is provided on the left side surface of the pump body 1, and a supporting compression spring 406 and a sealing ring block 407 are respectively provided inside thereof. The mounting column 403 is fixedly mounted on the left side surface of the pump body 1, and a locking column 408 is provided on the left side thereof.

[0033] Specifically, one end of the support compression spring 406 is fixed to the inner wall of the groove 402, and the other end thereof is fixed to the right side surface of the sealing ring block 407, the outer side surface of the convex ring 404 slides in contact with the inner wall of the groove 402, the left inner wall of the mounting hole 405 extends to the left side surface of the mounting ring block 401, and is symmetrically distributed front and back with respect to the outer side surface of the mounting ring block 401, the mounting column 403 is correspondingly matched with the mounting hole 405, and the locking column 408 is eccentrically connected to the left side surface of the mounting column 403 through a rotating shaft;

[0034] In the present embodiment, the groove 402 is mainly provided to facilitate contact with the convex ring 404, and the support compression spring 406 is mainly provided to elastically support the sealing ring block 407, so that the sealing ring block 407 can form a sealing contact with the convex ring 404, and the mounting hole 405 is provided to enable it to form a matching fit with the mounting column 403. Under the eccentric rotation of the locking column 408 and the mounting column 403, a locking connection is formed between the locking column 408 and the mounting ring block 401, thereby achieving the effect of convenient disassembly and assembly of the volute 2, thereby improving the convenience of the centrifugal pump.

[0035] The working process of the utility model is as follows: when a semi-open guide vane centrifugal pump is used, the centrifugal pump is first installed at the required position, and then the suction pipe 201 and the outlet pipe 202 are connected to the pipeline in sequence. Under the drive of the transmission end of the pump body 1, the pump shaft 3 drives the impeller 203 to rotate, thereby completing the operation of the centrifugal pump. Further, when it is necessary to disassemble the volute 2 and the pump body 1, the locking column 408 is eccentrically rotated by the rotating shaft to move the locking column 408 away from the mounting ring block 401 until the locking column 408 is completely separated from the mounting ring block 401. At this time, the supporting compression spring 406 in the compressed state gradually stretches and drives the sealing ring block 407 to apply a force to the convex ring 404, which causes the convex ring 404 to gradually move away from the groove 402, and the volute 2 and the mounting ring block 401 move with the movement of the convex ring 404, thereby completing the disassembly between the volute 2 and the pump body 1, providing convenience for the disassembly personnel.

[0036] 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 these 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 semi-open guide vane centrifugal pump, comprising a pump body (1) and a volute (2) arranged on the left side of the pump body (1), characterized in that: A pump shaft (3) is arranged on the left side of the pump body (1), a suction pipe (201) is fixedly installed on the left side of the volute (2), an outlet pipe (202) is fixedly arranged at the rear end of the outer side of the volute (2), an impeller (203) is arranged inside the volute (2), and a sealing disassembly mechanism (4) is arranged between the volute (2) and the pump body (1); The sealing and disassembling mechanism (4) comprises a mounting ring block (401), a groove (402) and a mounting column (403); the mounting ring block (401) is fixedly mounted on the right side surface of the volute (2), and a convex ring (404) and a mounting hole (405) are respectively arranged on the right side surface of the volute (2); the groove (402) is opened on the left side surface of the pump body (1), and a supporting compression spring (406) and a sealing ring block (407) are respectively arranged inside the groove; the mounting column (403) is fixedly mounted on the left side surface of the pump body (1), and a locking column (408) is arranged on the left side of the mounting column (403).

2. A semi-open guide vane centrifugal pump according to claim 1, characterized in that: The right end of the pump shaft (3) movably penetrates the left side surface of the pump body (1) and is connected to its transmission end.

3. A semi-open guide vane centrifugal pump according to claim 1, characterized in that: The left end of the pump shaft (3) extends to the inner side of the impeller (203), and is locked and connected to the impeller (203) via a nut.

4. A semi-open guide vane centrifugal pump according to claim 1, characterized in that: The impeller (203) is a semi-open impeller.

5. A semi-open guide vane centrifugal pump according to claim 1, characterized in that: One end of the support compression spring (406) is fixed to the inner wall of the groove (402), and the other end thereof is fixed to the right side surface of the sealing ring block (407).

6. A semi-open guide vane centrifugal pump according to claim 1, characterized in that: The outer surface of the convex ring (404) slides in contact with the inner wall of the groove (402).

7. A semi-open guide vane centrifugal pump according to claim 1, characterized in that: The left inner wall of the mounting hole (405) extends to the left surface of the mounting ring block (401), and is symmetrically distributed front to back with respect to the outer surface of the mounting ring block (401); the mounting column (403) and the mounting hole (405) are arranged in a corresponding matching manner; and the locking column (408) is eccentrically rotatably connected to the left surface of the mounting column (403) via a rotating shaft.

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