CN212838641U

CN212838641U - Mechanical seal cleaning mechanism of centrifugal pump

Info

Publication number: CN212838641U
Application number: CN202021829865.6U
Authority: CN
Inventors: 莫勇刚
Original assignee: Taizhou Tianyue Electromechanical Co ltd
Current assignee: Taizhou Tianyue Electromechanical Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-03-30
Anticipated expiration: 2030-08-27
Also published as: WO2022041302A1

Abstract

The utility model provides a centrifugal pump mechanical seal wiper mechanism belongs to mechanical technical field. The utility model discloses in, the centrifugal pump includes the pump body and rotor, all be equipped with the annular chamber that is used for placing mechanical seal between rotor both ends and the pump body, wiper mechanism is including locating two-way in the pump body and locating the four-way pipe outside the pump body, the four-way pipe includes left and right sides, upper and lower four tip, passageway one end intercommunication annular chamber, left and right-hand member part communicates two-way other end through the body respectively, lower tip intercommunication pump body inner chamber, be equipped with the shaft-like filter member in the upper end, the filter member upper end stretches out the upper end, filter member lower extreme extends to in the lower tip, filter member and upper end pass through the screw thread can dismantle the connection, it has annular fender portion one to filter member one on the outer wall of lower extreme integrally formed; filter and have the downward awl head that diminishes gradually of diameter on the diapire of piece, awl head and filter piece coaxial setting. The utility model discloses can prevent that mechanical seal is impaired.

Description

Mechanical seal cleaning mechanism of centrifugal pump

Technical Field

The utility model belongs to the technical field of machinery, a centrifugal pump, especially a centrifugal pump mechanical seal wiper mechanism are related to.

Background

Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller.

The existing centrifugal pump is a horizontal multistage centrifugal pump as disclosed in chinese patent library [ application number: 201610119238.5, including the pump body, pump cover, rotor portion dress and install the impeller in the pump body, the pump cover is covered detachablely on the pump body, rotor portion dress passes inside the pump body, rotor portion dress's both ends are in outside the pump body, the impeller is fixed rotor portion dress is gone up, still install additional pipe-line system on the pump body, rotor portion dress's one end is equipped with shaft coupling portion dress and front bearing portion dress, rotor portion dress's the other end is equipped with bearing portion dress, front bearing portion dress is located shaft coupling portion dress with between the pump body, pump body inner wall with be equipped with pump body sealing ring between the impeller.

The centrifugal pump utilizes the additional pipeline system to introduce water in the pump body to wash the mechanical seal arranged between the rotor and the pump body, but when impurities exist in the water, the impurities flow to the mechanical seal along with the additional pipeline system, the mechanical seal is seriously damaged, and the seal failure is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a can prevent the impaired centrifugal pump mechanical seal wiper mechanism of mechanical seal.

The purpose of the utility model can be realized by the following technical proposal: a kind of centrifugal pump mechanical seal cleaning mechanism, the centrifugal pump includes the pump body and level locates the rotor in the pump body, the rotor both ends and pump body are equipped with the annular chamber used for placing the mechanical seal, this cleaning mechanism includes locating the two-channel in the pump body and locating the four-way pipe outside the pump body, the four-way pipe includes left end, right end, upper end and lower end, one end of two-channel communicates two annular chambers separately, left end and right end communicate two-channel another end through the body separately, the lower end communicates the pump body cavity, its characteristic lies in, there are rod-like filter pieces vertically in the upper end, the upper end stretches out the upper end, the lower end of filter piece extends to the lower end, filter piece and upper end through the detachable connection of the whorl, and form and seal through the seal ring between inner wall of upper; an annular first blocking part is integrally formed on the outer wall of the lower end of the filtering piece, a seal is formed between the outer side wall of the annular first blocking part and the inner side wall of the lower end part, and vertically penetrating filtering holes I are densely distributed on the annular first blocking part; filter on the diapire integrated into one piece have the diameter taper head that diminishes downwards gradually, the taper head with filter coaxial setting, and the taper head upper end extends to a diapire department of annular fender portion.

The using process is as follows: water flowing into the lower end part from the inner cavity of the pump body enters the first filtering hole through the conical head, then enters the left end and the right end respectively after being blocked and purified by the first filtering hole, and then flows into the annular cavity through the pipe body and the flow channel to clean the mechanical seal.

Under the guide of the cone head with the diameter gradually reduced downwards, water is diffused towards the periphery and flows into the first filtering hole smoothly, so that the filtering efficiency and the filtering effect are improved, and impurities are prevented from entering the annular cavity to damage the mechanical seal.

In the mechanical seal cleaning mechanism of the centrifugal pump, the outer wall of the lower end of the filtering piece is also integrally formed with a second annular blocking part, a certain distance exists between the first annular blocking part and the second annular blocking part, a seal is formed between the outer side wall of the annular blocking part and the inner side wall of the lower end part, second filtering holes which vertically penetrate through the second annular blocking part are densely distributed on the second annular blocking part, and the aperture of the first filtering holes is larger than that of the second filtering holes. The design filter hole one and filter hole two, and filter hole two apertures is less than filter hole one, so both can form twice sealedly in vertical direction, improve water filter effect, can weaken the impact that annular fender portion one received again, improve the structural stability who filters the piece.

In the mechanical seal cleaning mechanism of the centrifugal pump, the inner side wall of the lower end part is a cylindrical surface, the first annular baffle part and the second annular baffle part are both in a circular ring shape matched with the cylindrical surface, and the outer side walls of the first annular baffle part and the second annular baffle part are both attached to the cylindrical surface to form a seal.

In the mechanical seal cleaning mechanism of the centrifugal pump, the aperture of the first filtering hole is 0.6-1 mm, and the aperture of the second filtering hole is 0.25-0.5 mm.

In the above mechanical seal cleaning mechanism for a centrifugal pump, the middle part of the top wall of the filter member is provided with a quadrilateral rotary hole, so that a tool can be inserted into the rotary filter member to clean the first filter hole and the second filter hole.

In the mechanical seal cleaning mechanism of the centrifugal pump, the outer wall of the upper end of the filter piece is provided with the annular groove, the seal ring is positioned in the annular groove, and the outer side wall of the seal ring is abutted to the inner side wall of the upper end part.

Compared with the prior art, the mechanical seal cleaning mechanism of the centrifugal pump has the advantages that:

1. under the guide of the cone head with the diameter gradually reduced downwards, water is diffused towards the periphery and flows into the first filtering hole smoothly, so that the filtering efficiency and the filtering effect are improved, and impurities are prevented from entering the annular cavity to damage the mechanical seal.

2. The design filter hole one and filter hole two, and filter hole two apertures is less than filter hole one, so both can form twice sealedly in vertical direction, improve water filter effect, can weaken the impact that annular fender portion one received again, improve the structural stability who filters the piece.

Drawings

Fig. 1 is a schematic view of the structure of a centrifugal pump.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is an enlarged schematic view of the structure at B in fig. 1.

Fig. 4 is a schematic view of the filter element.

In the figure, 1, a pump body; 1a, a channel; 2. a rotor; 3. an annular cavity; 4. a four-way pipe; 4a, an upper end; 4b, a lower end portion; 4c, left end; 4d, right end; 5. a pipe body; 6. a filter member; 6a, a first annular baffle part; 6a1, filter hole one; 6b, a conical head; 6c, an annular baffle part II; 6c1 and a second filter hole; 6d, rotating the hole; 7. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and fig. 2, in the mechanical seal cleaning mechanism of the centrifugal pump, the centrifugal pump includes a pump body 1 and a rotor 2 horizontally disposed in the pump body 1, wherein both ends of the rotor 2 extend out of the pump body 1, and an annular cavity 3 for placing a mechanical seal is disposed between both ends of the rotor 2 and the pump body 1.

The cleaning mechanism comprises two channels 1a arranged in the pump body 1 and a four-way pipe 4 arranged outside the pump body 1. The four-way pipe 4 comprises a left end 4c, a right end 4d, an upper end 4a and a lower end 4b, and the four ends are communicated with each other through a flow passage cavity in the four-way pipe 4. The channel 1a is strip-shaped, one end of the two channels 1a is respectively communicated with the two annular cavities 3, the left end part 4c and the right end part 4d are respectively communicated with the other end of the two channels 1a through the tube body 5, and the lower end part 4b is communicated with the inner cavity of the pump body 1. In the present embodiment, the left end portion 4c and the tube body 5 and the right end portion 4d and the tube body 5 are connected by a screw thread; the pump body 1 is provided with a vertically-penetrated threaded hole, the lower end part 4b is in threaded connection in the threaded hole, and sealing is realized by winding the thread seal tape.

As shown in fig. 3 and 4, a rod-shaped filter member 6 is vertically provided in the upper end portion 4a, and preferably, the filter member 6 has a straight rod shape. The upper end of the filter element 6 extends out of the upper end portion 4a, and the lower end of the filter element 6 extends into the lower end portion 4 b. The filtering piece 6 is detachably connected with the upper end part 4a through threads, and a seal is formed between the filtering piece 6 and the inner wall of the upper end part 4a through a sealing ring 7. Particularly, the annular groove is formed in the outer wall of the upper end of the filtering piece 6, the sealing ring 7 is located in the annular groove, the outer side wall of the sealing ring 7 is abutted to the inner side wall of the upper end portion 4a, and reliable sealing is formed between the filtering piece 6 and the upper end portion 4 a. Filter and have annular fender portion 6a on 6 lower extreme outer walls of piece, and annular fender portion 6a and filter piece 6 coaxial settings. A seal is formed between the outer side wall of the annular baffle part I6 a and the inner side wall of the lower end part 4b, and filter holes I6 a1 which vertically penetrate through are densely distributed on the annular baffle part I6 a. Filter 6 integrated into one piece and have the downward awl head 6b that diminishes gradually of diameter on the diapire, awl head 6b and filter 6 coaxial settings of piece, and awl head 6b upper end extends to 6a diapire departments of annular fender portion. Under the guide of the conical head 6b with the diameter gradually decreasing downwards, the water is diffused to the periphery, so that the water flows into the first filtering hole 6a1 more smoothly.

Further, the outer wall of the lower end of the filtering piece 6 is also integrally formed with a second annular blocking portion 6c, the second annular blocking portion 6c and the filtering piece 6 are coaxially arranged, and a certain distance exists between the first annular blocking portion 6a and the second annular blocking portion 6 c. A seal is formed between the outer side wall of the second annular baffle part 6c and the inner side wall of the lower end part 4b, a second filter hole 6c1 which vertically penetrates is densely distributed on the second annular baffle part 6c, and the aperture of the first filter hole 6a1 is larger than that of the second filter hole 6c 1. The first filtering hole 6a1 and the second filtering hole 6c1 are designed, and the aperture of the second filtering hole 6c1 is smaller than that of the first filtering hole 6a1, so that two seals can be formed in the vertical direction to improve the water filtering effect, and the impact on the first annular blocking part 6a can be weakened to improve the structural stability of the filtering piece 6.

In this embodiment, the inner side wall of the lower end portion 4b is a cylindrical surface, the first annular blocking portion 6a and the second annular blocking portion 6c are both in a circular ring shape matched with the cylindrical surface, and the outer side walls of the first annular blocking portion 6a and the second annular blocking portion 6c are both attached to the cylindrical surface to form sealing. The aperture of the first filtering hole 6a1 is 0.6 mm-1 mm, and the aperture of the second filtering hole 6c1 is 0.25 mm-0.5 mm. The aperture of the first filter hole 6a1 is preferably 0.8 mm; the aperture of the second filter hole 6c1 is 0.3 mm.

As shown in fig. 4, the central portion of the top wall of the filter member 6 is provided with a rotation hole 6d having a quadrangular shape to facilitate the insertion of a tool into the rotary filter member 6 to clean the first filter hole 6a1 and the second filter hole 6c 1.

The using process is as follows: the water flowing from the inner cavity of the pump body 1 into the lower end part 4b is guided into the first filter hole 6a1 through the conical head 6b, flows into the second filter hole 6c1 for purification after being blocked by the first filter hole 6a1, then flows into the left end and the right end respectively, and then is guided to flow into the annular cavity 3 through the pipe body 5 and the flow passage to clean the mechanical seal.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A mechanical seal cleaning mechanism of a centrifugal pump comprises a pump body (1) and a rotor (2) horizontally arranged in the pump body (1), annular cavities (3) used for placing mechanical seals are arranged between two ends of the rotor (2) and the pump body (1), the cleaning mechanism comprises two channels (1a) arranged in the pump body (1) and a four-way pipe (4) arranged outside the pump body (1), the four-way pipe (4) comprises a left end part (4c), a right end part (4d), an upper end part (4a) and a lower end part (4b), one end of each channel (1a) is respectively communicated with the two annular cavities (3), the left end part (4c) and the right end part (4d) are respectively communicated with the other ends of the two channels (1a) through a pipe body (5), the lower end part (4b) is communicated with an inner cavity of the pump body (1), and is characterized in that a filtering piece (6) in a rod shape is vertically arranged, the upper end of the filtering piece (6) extends out of the upper end part (4a), the lower end of the filtering piece (6) extends into the lower end part (4b), the filtering piece (6) is detachably connected with the upper end part (4a) through threads, and the inner wall of the filtering piece (6) and the inner wall of the upper end part (4a) are sealed through a sealing ring (7); an annular first blocking part (6a) is integrally formed on the outer wall of the lower end of the filtering piece (6), a seal is formed between the outer side wall of the annular first blocking part (6a) and the inner side wall of the lower end part (4b), and a first filtering hole (6a1) which vertically penetrates through the annular first blocking part (6a) is densely distributed; filter on (6) the diapire integrated into one piece have diameter taper head (6b) that gradually diminishes downwards, taper head (6b) and filter (6) coaxial setting, and taper head (6b) upper end extends to annular fender portion one (6a) diapire department.

2. The mechanical seal cleaning mechanism of the centrifugal pump according to claim 1, wherein the outer wall of the lower end of the filtering member (6) is integrally formed with a second annular blocking portion (6c), a certain distance exists between the first annular blocking portion (6a) and the second annular blocking portion (6c), a seal is formed between the outer side wall of the second annular blocking portion (6c) and the inner side wall of the lower end portion (4b), the second annular blocking portion (6c) is densely provided with second filtering holes (6c1) which vertically penetrate through, and the diameter of the first filtering holes (6a1) is larger than that of the second filtering holes (6c 1).

3. The mechanical seal cleaning mechanism of the centrifugal pump according to claim 2, wherein the inner side wall of the lower end part (4b) is a cylindrical surface, the first annular baffle part (6a) and the second annular baffle part (6c) are both in a circular ring shape matched with the cylindrical surface, and the outer side walls of the first annular baffle part (6a) and the second annular baffle part (6c) are both attached to the cylindrical surface to form a seal.

4. A centrifugal pump mechanical seal cleaning mechanism according to claim 2 or 3, wherein the aperture of the first filter hole (6a1) is 0.6 mm-1 mm, and the aperture of the second filter hole (6c1) is 0.25 mm-0.5 mm.

5. A centrifugal pump mechanical seal cleaning mechanism according to claim 1, characterized in that the filter member (6) is provided with a quadrangular rotation hole (6d) in the middle of the top wall thereof.

6. The mechanical seal cleaning mechanism of the centrifugal pump according to claim 1, wherein the outer wall of the upper end of the filter member (6) is provided with an annular groove, the sealing ring (7) is positioned in the annular groove, and the outer side wall of the sealing ring (7) is abutted against the inner side wall of the upper end portion (4 a).