CN210141200U - Long service life's axial-flow pump - Google Patents

Abstract

The utility model provides an axial-flow pump with long service life, which comprises a water inlet pipe arranged at the lower end of an axial-flow pump body, a filter screen sleeve arranged in the water inlet pipe, a filter screen arranged at the upper part of the filter screen sleeve, middle part cover body and lower part fixed plate, the axial of filter screen cover is equipped with first sleeve pipe, first through-hole has been seted up to the lower part fixed plate, be equipped with movable assembly in the first through-hole, movable assembly includes the sliding plate and articulates in the fly leaf at lower part fixed plate border, sliding plate sliding connection fly leaf, the border of fly leaf matches in the border of first through-hole, the sliding plate seted up with first cover pipe external shape assorted arc wall, be equipped with the torsional spring between fly leaf and the lower part fixed plate, first sheathed tube bottom is through many leg joint in the inner wall of inlet tube, rotate in the first sleeve pipe and install first pivot, first pivot is including exposing the end that exposes in first sheathed tube bottom, a plurality of blades have been laid to the circumference that exposes the. Utilize the utility model provides an axial-flow pump can realize the collection to pasture and water or rubbish, and life is longer.

Description

Long service life's axial-flow pump

Technical Field

The utility model relates to an axial-flow pump field, concretely relates to long service life's axial-flow pump.

Background

The Chinese database discloses a patent named as an axial flow pump for sewage treatment equipment, wherein the application number is CN201811085420.9, the application date is 2018.09.18, the publication number is CN108843581A, and the publication date is 2018.11.20. This kind of axial-flow pump for sewage treatment device, including the axial-flow pump body, fixed mounting has same dead lever on the both sides inner wall of axial-flow pump body, and the top side of dead lever is rotated and is installed the dwang, and the top fixed mounting of dwang has the frame of placing, the top side fixed mounting of axial-flow pump body has fixed frame, and fixed mounting has the rotating electrical machines on the top side inner wall of fixed frame, and the output shaft of rotating electrical machines passes through shaft coupling fixed mounting and has the axis of rotation, and the bottom of axis of rotation extends to the inside that is located this internal frame of placing of axial-flow pump, place and seted up the rotation groove on the bottom side inner wall. Although pollutants accumulated on the inner walls of the two sides of the axial flow pump can be cleaned, water plants and other river garbage can be wound on a rotating shaft, a guide vane or an impeller in the axial flow pump when the axial flow pump is used in a river channel or other water bodies with pollutants according to different using environments of the axial flow pump, so that the using effect of the axial flow pump is influenced, and the service life of the axial flow pump is shortened.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a can cut and collect the axial-flow pump of river rubbish such as pasture and water, avoid winding on axial-flow pump's axis of rotation, guide vane or the impeller, prolonged axial-flow pump's life.

In order to achieve the above object, the utility model discloses a long service life's axial-flow pump, include: the axial flow pump comprises an axial flow pump body 1 provided with a straight pipe end and a bent pipe end, wherein a rotating shaft 2 is arranged in the axial direction of the straight pipe end, the upper end of the rotating shaft 2 is rotatably connected with the axial flow pump body 1 and extends out of the axial flow pump body 1, a guide vane 3 and an impeller 4 are sequentially connected with the lower end of the rotating shaft 2 from top to bottom, a water inlet pipe 5 is connected with the lower end of the straight pipe end, a hollow filter screen sleeve 6 is arranged inside the water inlet pipe 5, the filter screen sleeve 6 comprises an upper filter screen 7, a middle sleeve body 8 and a lower fixing plate 9 which are sequentially connected, a first sleeve 10 is arranged in the axial direction of the filter screen sleeve 6, a first through hole 29 is formed in the middle of the lower fixing plate 9, the bottom of the first sleeve 10 penetrates through and extends out of the first through hole 29, and a plurality of movable, the movable components comprise a sliding plate 12 and a movable plate 11 hinged to the edge of the lower fixed plate 9, the sliding plate 12 is slidably connected to one end of the movable plate 11 close to the first sleeve, an elastic body 13 is arranged between the sliding plate 12 and the movable plate 11 and used for applying an acting force to the sliding plate 12 away from the movable plate 11 along the sliding direction of the sliding plate 12, a limiting device is further arranged between the sliding plate 12 and the movable plate 11, the edge of the movable plate 11 in the plurality of movable components is matched with the edge of the first through hole, an arc-shaped groove matched with the outer shape of the first sleeve is formed in one end of the sliding plate 12 close to the first sleeve, and a torsion spring 21 is arranged between the movable plate 11 and the lower fixed plate 9 and used for enabling the plurality of movable components to be closed to form a whole body for closing the first through hole, first sheathed tube bottom through many support 22 connect in the inner wall of inlet tube 5, rotate in the first sleeve and install first pivot 23, first pivot 23 including expose in the end that exposes of first sheathed tube bottom, a plurality of blades 24 have evenly been laid to the circumference that exposes the end, the blade is followed the axial slope of first pivot 23 is laid, the cutting edge of blade sets up down.

The beneficial effects of the utility model reside in that: after the axial-flow pump is started, the first rotating shaft 23 rotates under the action of water flow to drive the blades to rotate, and the blades are utilized to cut impurities such as waterweeds or garbage; meanwhile, the movable assembly is turned upwards, the impurities cut into small pieces enter the filter screen sleeve, the impurities are filtered by the filter screen sleeve, the impurities are prevented from entering the axial flow pump body and being wound on the rotating shaft, the guide vanes or the impeller, normal operation of the axial flow pump is guaranteed, and the service life is prolonged.

The utility model relates to a long service life's axial-flow pump's further improvement lies in, the up end of fly leaf 11 is equipped with fixing base 25, second sleeve 27 has set firmly on the fixed plate of lower part, rotate in the fixing base and install second pivot 26, the rotatable inserting of tip of second pivot 26 is located in the second sleeve 27, torsional spring 21 cup joint in on the second pivot 26, torsional spring 21's first end support in fly leaf 11, torsional spring 21's second end support in the fixed plate of lower part. Through set up torsional spring 21 between fly leaf 11 and lower part fixed plate, when the axial-flow pump is closed, the movable part is closed under the effect of torsional spring 21 reset force, avoids the impurity that adsorbs in the filter screen cover to drop, has realized the collection to pasture and water or rubbish.

The utility model relates to a further improvement of long service life's axial-flow pump lies in, the ring channel that is used for placing the bearing is formed respectively at the both ends of first sleeve pipe, first pivot 23 pass through the bearing rotate install in the first sleeve pipe, the first end of first pivot 23 is formed with the shaft shoulder, a bearing has been laid between the shaft shoulder and the ring channel, the bottom of shaft shoulder pastes the inner circle terminal surface that corresponds to the bearing, the up end of shaft shoulder is seted up hemispherical lower circular arc groove, place assorted spheroid 33 in the lower circular arc groove, the top of shaft shoulder is connected with first gland 34, set up on the first gland and match with spheroid 33 and the radius is less than the last circular arc logical groove of spheroid 33, the top of spheroid 33 passes and exposes in last circular arc logical groove, the first terminal surface that corresponds to the shaft shoulder of first sleeve pipe is connected with second gland 35, the lower terminal surface of second gland 35 is formed with the matching the circular arc groove 36 on spheroid 33 top, the top of spheroid 33 set up in the circular arc groove 26 and with the tank bottom clearance fit of circular arc groove 26, be provided with first sealing member between second gland 35 and the first sleeve pipe 10, the bottom of first sleeve pipe 10 is connected with third gland 37, third gland 37 with another bearing has been laid between the first sleeve pipe 10, the outer lane terminal surface in another bearing is supported in third gland 37 top, the terminal surface is provided with the second sealing member under third gland and the first sleeve pipe, offer the confession on the third gland third through hole 38 that first pivot 23 wore to establish, third through hole 38 with be equipped with the third sealing member between the first pivot 23. By adopting the structure, the first bearing can be accurately positioned and the running stability of the first bearing can be ensured.

The utility model relates to a further improvement of long service life's axial-flow pump lies in, spheroid 33 with go up the circular arc and lead to the groove and reach down gapped between the circular arc groove, be coated with lubricating grease in the clearance, it leads to the groove and is equipped with the fourth sealing member to go up the circular arc between the spheroid. The radial and axial limiting of the first rotating shaft 23 is further realized, and the mounting precision of the first bearing is ensured.

The utility model relates to a long service life's axial-flow pump further improves and lies in, the radial enhancement strip 39 that is radial arrangement that is equipped with many of upper portion filter screen, the first end of strengthening strip 39 is connected in first sleeve, the second end of strengthening the strip connect in the middle part cover body 8. Through setting up the enhancement strip, improve the holistic structural strength of upper portion filter screen.

The utility model relates to a long service life's axial-flow pump's further improvement lies in, being close to of fly leaf 11 the confession has been seted up to first sheathed tube one end sliding tray 14 that sliding plate 12 slided and establish, laid a plurality of reference columns 15 on the length direction of sliding tray's 14 tank bottoms, seted up on the reference column and followed the guiding hole 16 that the opening direction of sliding tray set up, be equipped with on sliding plate 12 aim at and match in the guiding post 17 of guiding hole, elastomer 13 is compression spring, compression spring's first end cup joint in on the reference column 15, compression spring's second end cup joint in guiding post 17. By arranging the compression spring between the sliding plate 12 and the movable plate 11, the arc-shaped groove of the sliding plate 12 can be ensured to be attached to the outer wall of the first sleeve when the axial flow pump is stopped.

The utility model relates to a further improvement of long service life's axial-flow pump lies in, stop device is including seting up in screw hole on the fly leaf, seting up in spacing groove 19 and spiro union in on the sliding plate 12 the screw hole just stretches into spiro union piece 18 in the spacing groove 19, spacing groove 19 is followed the slip direction of sliding plate 12 is laid, seted up on the fly leaf 11 corresponding to spacing groove 19 the screw hole. The movable plate 11 is limited through the screw connector 18, so that the sliding plate 12 is prevented from deviating in the use process, and the first through hole cannot be sealed when the axial flow pump is stopped.

Drawings

Fig. 1 is a schematic structural diagram of a middle axial flow pump of the present invention.

Fig. 2 is an enlarged schematic view of the internal structure of the middle water inlet pipe of the present invention.

Fig. 3 is a schematic structural diagram of the movable assembly of the present invention.

Fig. 4 is an enlarged schematic view at a in fig. 3.

Fig. 5 is an enlarged schematic view at B in fig. 2.

Fig. 6 is an enlarged schematic view at C in fig. 2.

Fig. 7 is an enlarged schematic view at D in fig. 2.

Fig. 8 is a schematic structural view of the middle upper filter screen of the present invention.

Detailed Description

To facilitate understanding of the present invention, the following description is made with reference to the accompanying drawings and examples.

Referring to fig. 1 to 6, the utility model discloses an axial flow pump with long service life, which comprises an axial flow pump body 1 provided with a straight pipe end and a bent pipe end, wherein the axial direction of the straight pipe end is provided with a rotating shaft 2, the upper end of the rotating shaft 2 is rotatably connected with the axial flow pump body 1 and extends out of the axial flow pump body 1, and the lower end of the rotating shaft 2 is sequentially connected with a guide vane 3 and an impeller 4 from top to bottom; the lower end of the straight pipe end is connected with a water inlet pipe 5, an internal hollow filter screen sleeve 6 is installed inside the water inlet pipe 5, the filter screen sleeve 6 comprises an upper filter screen 7, a middle sleeve body 8 and a lower fixing plate 9 which are sequentially connected, a first sleeve 10 is axially arranged on the filter screen sleeve 6, a first through hole 29 is formed in the middle of the lower fixing plate 9, the bottom of the first sleeve 10 penetrates through and extends out of the first through hole 29, a plurality of movable components for sealing the first through hole 29 are arranged in the first through hole 29, each movable component comprises a sliding plate 12 and a movable plate 11 hinged to the edge of the lower fixing plate 9, the sliding plate 12 is slidably connected to one end, close to the first sleeve, of the movable plate 11, an elastic body 13 is arranged between the sliding plate 12 and the movable plate 11 and used for applying an acting force, far away from the movable plate 11, to the sliding, the edge of the movable plate 11 in the plurality of movable assemblies is matched with the edge of the first through hole 29, one end of the sliding plate 12, which is close to the first sleeve 10, is provided with an arc-shaped groove 20 matched with the appearance of the first sleeve 10, a torsion spring 21 is arranged between the movable plate 11 and the lower fixing plate 9 and used for enabling the plurality of movable assemblies to be closed to form a whole for sealing the first through hole, the bottom of the first sleeve is connected to the inner wall of the water inlet pipe 5 through a plurality of supports 22, a first rotating shaft 23 is rotatably installed in the first sleeve 10, the first rotating shaft 23 comprises an exposed end exposed at the bottom end of the first sleeve 10, a plurality of blades 24 are uniformly distributed in the circumferential direction of the exposed end, the blades 24 are obliquely distributed along the axial direction of the first rotating shaft 23, and the cutting. In the embodiment, (1) the aquatic weeds or garbage can be collected by arranging the hollow filter screen sleeves 6, so that the influence on the normal operation of the axial flow pump caused by the aquatic weeds or garbage entering the axial flow pump body 1 is avoided; (2) by obliquely arranging the blades 24 along the axial direction of the first rotating shaft 23, when the axial-flow pump works normally, the blades 24 are subjected to the action force of water flow to drive the first rotating shaft 23 to rotate, and at the moment, the blades 24 rotating at a high speed can cut aquatic weeds and garbage into small pieces, so that the water inlet pipe 5 is prevented from being blocked; (3) the first through hole 29 is sealed through the movable assembly, when the axial flow pump is stopped, the movable assembly seals the first through hole 29 under the action of the torsion spring 21, the sliding plate 12 in the movable assembly is attached to the outer edge of the first sleeve 10 under the action of the elastic body 13, aquatic weeds or garbage in the filtering sleeve 6 are prevented from falling, and the aquatic weeds or garbage are collected. Specifically, (1) the middle sleeve body 8 is in a ring shape; (2) the filter screen 6 is detachably mounted in the water inlet pipe 5, and the connection structure between the filter screen 6 and the water inlet pipe 5 is not described in detail in this embodiment, and reference may be made to the prior art.

Further, a fixing seat 25 is disposed on an upper end surface of the movable plate 11, a second sleeve 27 is fixedly disposed on the lower fixing plate 9, a second rotating shaft 26 is rotatably mounted in the fixing seat 25, an end portion of the second rotating shaft 26 is rotatably inserted into the second sleeve 27, the torsion spring 21 is sleeved on the second rotating shaft 26, a first end of the torsion spring 21 is supported on the movable plate 11, and a second end of the torsion spring 21 is supported on the lower fixing plate 9. In this embodiment, in the normal operation process of the axial flow pump, the movable plate 11 is turned upwards under the action of the pressure of the water flow, at this time, the torsion spring 21 is compressed, and after the axial flow pump is stopped, the movable plate 11 is restored to the initial position (i.e. the position where the movable assembly closes the first through hole) under the action of the restoring force of the torsion spring 21, so as to close the first through hole.

Further, two ends of the first sleeve are respectively formed with an annular groove for placing a bearing, the first rotating shaft 23 is rotatably installed in the first sleeve through the bearing, a shaft shoulder is formed at the first end of the first rotating shaft 23, a bearing is arranged between the shaft shoulder and the annular groove, the bottom end of the shaft shoulder is attached to the inner ring end surface of the corresponding bearing, a hemispherical lower arc groove is formed on the upper end surface of the shaft shoulder, a matched ball 33 is placed in the lower arc groove, the top end of the shaft shoulder is connected with a first gland 34, an upper arc through groove matched with the ball 33 and having a radius smaller than that of the ball 33 is formed on the first gland, the top end of the ball 33 passes through and is exposed out of the upper arc through groove, the first end surface of the first sleeve corresponding to the shaft shoulder is connected with a second gland 35, an arc groove 36 matched with the top end of the ball 33 is formed on the lower end surface of the second gland 35, the top end of the ball 33 is arranged in the arc groove 26, be provided with first sealing member between second gland 35 and the first sleeve pipe 10, the bottom of first sleeve pipe 10 is connected with third gland 37, third gland 37 and first sleeve pipe 10 have laid another institute's bearing and have pressed to support in another bearing, third gland 37 top supports in the outer lane terminal surface of another bearing, be equipped with the second sealing member between third gland 37 and the lower terminal surface of first sleeve pipe 10, set up the third through hole 38 that supplies first pivot 23 to wear to establish on the third gland 37, be equipped with the third sealing member between third through hole 38 and the first pivot 23. In this embodiment, accurate positioning of the first end bearing of the first rotating shaft 23 is realized by arranging the shaft shoulder, the first gland 34, the second gland 35 and the ball 33, and accurate positioning of the second end bearing of the first rotating shaft 23 is realized by arranging the third gland, so that the installation accuracy of the first rotating shaft 23 is ensured, deviation in the rotating process is avoided, and noise in the operating process of the axial flow pump is reduced.

Furthermore, a gap (clearance fit) is formed between the ball body 33 and the upper arc through groove and the lower arc through groove, lubricating grease is coated in the gap, and a fourth sealing element is arranged between the upper arc through groove and the ball body 33. Specifically, through leading to the groove with spheroid 33 and last circular arc and scribbling lubricating grease between the circular arc groove down clearance fit, can guarantee that first pivot 23 rotates the rolling smooth and easy nature of in-process spheroid 33, through laying the fourth sealing member, guarantee sealing connection and spheroid 33's between each other sufficient lubrication, avoid lubricating grease to leak or during water gets into the clearance.

Furthermore, a sliding groove 14 for the sliding plate 12 to slide is formed in one end of the movable plate 11 close to the first sleeve, a plurality of positioning columns 15 are arranged in the length direction of the bottom of the sliding groove 14, a guide hole 16 is formed in the positioning columns 15 and arranged along the opening direction of the sliding groove 14, a guide post 17 aligned with and matched with the guide hole 16 is arranged on the sliding plate 12, the elastic body 13 is a compression spring, a first end of the compression spring is sleeved on the positioning column 15, and a second end of the compression spring is sleeved on the guide post 17. In this embodiment, the compression spring is arranged between the sliding plate 12 and the movable plate 11, so that the sliding plate 12 can be ensured to be attached to the outer wall of the first sleeve 10 under the action of the compression spring when the axial flow pump is stopped, and the first through hole 29 is ensured to be sealed; the guide posts 17 are aligned with the guide holes 16 to guide the sliding plate 12, so that the sliding plate 12 is prevented from shifting during sliding; specifically, one end of the guide post 17 is inserted into the guide hole 16.

Furthermore, the limiting device includes a threaded hole opened on the movable plate 11, a limiting groove 19 opened on the sliding plate 12, and a screw joint member 18 screwed in the threaded hole and extending into the limiting groove 19, the limiting groove 19 is disposed along the sliding direction of the sliding plate 12, and the movable plate 11 is provided with a threaded hole corresponding to the limiting groove 19. In this embodiment, the movable plate 11 is limited by the screw 18, so as to avoid the sliding plate 12 from shifting in the length direction of the sliding groove 14, which results in the sliding plate 12 in the adjacent movable assembly being dislocated, and the technical problem that the first through hole 29 cannot be closed is solved.

In the utility model, a plurality of reinforcing strips 39 (shown in fig. 7) are radially arranged on the upper filter screen 7, the first ends of the reinforcing strips 39 are connected to the first sleeve 10, and the second ends of the reinforcing strips 39 are connected to the middle sleeve body 8; by arranging the reinforcing strips 39, the structural strength of the upper filter screen is improved.

The utility model discloses in, the axial of first sleeve 10, the axial of first through-hole 29, the axial collineation of first pivot 23.

The utility model relates to a long service life's axial-flow pump's beneficial effect includes:

1. through the bottom installation blade at first pivot, realize cutting pasture and water or rubbish when the axial-flow pump is opened the action, avoid blockking up the inlet tube, can realize the recovery to pasture and water and rubbish through laying the filter screen cover in the inlet tube, avoid getting into the winding in the axial-flow pump body on axis of rotation, guide vane or impeller, influence the normal work of axial-flow pump, prolonged the life of axial-flow pump.

2. Through at the fly leaf with be equipped with the torsional spring between the fixed plate of lower part and set up compression spring between fly leaf and sliding plate, when can guaranteeing that axial-flow pump shut down, the fly leaf resumes initial position under the effect of torsional spring reset force, and the sliding plate laminating in first sheathed tube outer wall under compression spring's effect realizes the closure to first through-hole, avoids the pasture and water or the rubbish whereabouts of filter screen cover collection.

3. Adopt the utility model provides a first gland, second gland, third closing machine sphere structure can realize the accurate location (including axial positioning and radial positioning) to first pivot.

4. The axial flow pump has simple structure, better adaptability and longer service life.

The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the above preferred embodiments, but the present invention is not limited to the above embodiments, and any skilled person familiar with the art can make some changes or modifications to equivalent embodiments without departing from the technical scope of the present invention, but all the technical matters of the present invention are within the scope of the technical solution of the present invention.

It should be noted that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the range that the technical content disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention.

Claims (7)

1. The utility model provides a long service life's axial-flow pump, is including the axial-flow pump body that is equipped with straight tube end and elbow end, the axial of straight tube end is provided with the axis of rotation, the axis of rotation upper end is rotated with the axial-flow pump body and is connected and stretch out in the outside of axial-flow pump body, the axis of rotation lower extreme has connected gradually guide vane and impeller, its characterized in that from last to down: the lower end of the straight pipe end is connected with a water inlet pipe, a hollow filter screen sleeve is arranged in the water inlet pipe, the filter screen sleeve comprises an upper filter screen, a middle sleeve body and a lower fixing plate which are sequentially connected, a first sleeve is axially arranged on the filter screen sleeve, a first through hole is formed in the middle of the lower fixing plate, the bottom of the first sleeve penetrates through and extends out of the first through hole, a plurality of movable components for sealing the first through hole are arranged in the first through hole, each movable component comprises a sliding plate and a movable plate hinged to the edge of the lower fixing plate, the sliding plate is connected to one end, close to the first sleeve, of the movable plate in a sliding mode, an elastic body is arranged between the sliding plate and the movable plate and used for applying acting force, far away from the movable plate, to the sliding plate along the, a limiting device is arranged between the sliding plate and the movable plates, the edges of the movable plates in the plurality of movable assemblies are matched with the edges of the first through holes, an arc-shaped groove matched with the outer shape of the first sleeve is formed at one end of the sliding plate close to the first sleeve, a torsion spring is arranged between the movable plate and the lower fixed plate, a plurality of movable components are closed to form a whole body for closing the first through hole, the bottom of the first sleeve is connected with the inner wall of the water inlet pipe through a plurality of brackets, a first rotating shaft is rotatably arranged in the first sleeve, the first rotating shaft comprises an exposed end exposed out of the bottom end of the first sleeve, the cutter is characterized in that a plurality of blades are uniformly distributed in the circumferential direction of the exposed end, the blades are obliquely distributed along the axial direction of the first rotating shaft, and the cutting edges of the blades are arranged downwards.

2. A long-life axial flow pump according to claim 1, characterized in that: the upper end face of fly leaf is equipped with the fixing base, the second sleeve pipe has set firmly on the fixed plate of lower part, rotate in the fixing base and install the second pivot, the rotatable inserting of tip of second pivot is located in the second sleeve pipe, the torsional spring cup joint in on the second pivot, the first end of torsional spring prop up in the fly leaf, the second end of torsional spring prop up in the fixed plate of lower part.

3. A long-life axial flow pump according to claim 1, characterized in that: the two ends of the first sleeve are respectively provided with an annular groove for placing a bearing, the first rotating shaft is rotatably arranged in the first sleeve through the bearing, a shaft shoulder is formed at the first end of the first rotating shaft, a bearing is arranged between the shaft shoulder and the annular groove, the bottom end of the shaft shoulder is attached to the inner ring end surface of the corresponding bearing, a hemispherical lower arc groove is formed in the upper end surface of the shaft shoulder, matched balls are placed in the lower arc groove, the top end of the shaft shoulder is connected with a first gland, an upper arc through groove matched with the balls and having a radius smaller than that of the balls is formed in the first gland, the top end of the balls passes through and is exposed out of the upper arc through groove, the first end surface of the first sleeve corresponding to the shaft shoulder is connected with a second gland, and an arc groove matched with the top end of the balls is formed in the lower end surface of the second gland, the spheroidal top set up in the circular arc groove and with the tank bottom clearance fit in circular arc groove, be provided with first sealing member between second gland and the first sleeve, first sheathed tube bottom is connected with the third gland, the third gland with another bearing has been laid between the first sleeve, the third gland pushes up the outer lane terminal surface in another bearing, the terminal surface is provided with the second sealing member under third gland and the first sleeve, set up the confession on the third gland the third through-hole that first pivot was worn to establish, the third through-hole with be equipped with the third sealing member between the first pivot.

4. A long-life axial flow pump according to claim 3, characterized in that: gaps are reserved among the ball body, the upper arc through groove and the lower arc groove, lubricating grease is coated in the gaps, and a fourth sealing element is arranged between the upper arc through groove and the ball body.

5. A long-life axial flow pump according to claim 1, characterized in that: the radial of upper portion filter screen is equipped with many and is the enhancement strip of radial arrangement, the first end of strengthening the strip is connected in first sleeve, the second end of strengthening the strip connect in the middle part cover body.

6. A long-life axial flow pump according to claim 1, characterized in that: the movable plate is provided with a sliding groove for the sliding plate to slide, a plurality of positioning columns are distributed in the length direction of the bottom of the sliding groove, guide holes are formed in the positioning columns along the opening direction of the sliding groove, guide columns aligned with and matched with the guide holes are arranged on the sliding plate, the elastic body is a compression spring, the first end of the compression spring is sleeved on the positioning columns, and the second end of the compression spring is sleeved on the guide columns.

7. A long-life axial flow pump according to claim 6, characterized in that: the limiting device comprises a threaded hole formed in the movable plate, a limiting groove formed in the sliding plate and a threaded connecting piece which is in threaded connection with the threaded hole and extends into the limiting groove, the limiting groove is arranged along the sliding direction of the sliding plate, and the movable plate is provided with the threaded hole corresponding to the limiting groove.

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