Centrifugal pump with multiple seals

Abstract

The invention relates to the technical field of centrifugal pumps, in particular to a multi-seal centrifugal pump which comprises a pump body, a water inlet pipe, a water outlet pipe, a movable rod and the like. The pump machine body communicates with a water inlet pipe; the pump body communicates with a water outlet pipe; the water inlet pipe is provided with an observation window; a sealing sleeve penetrates through the water inlet pipe; a movable rod slides in the sealing sleeve in a penetrating manner; the movable rod is divided into a fixed part and a rotating part which are rotationally connected, the fixed part slides in the sealing sleeve, and the rotating part of the movable rod is located in the water inlet pipe. The pulling movable rod is manually driven, the stirring rod is driven to move to temporarily separate and clean aquatic plants wound on the surface of the filter screen or aquatic plant tissue aquatic plants, the blocking phenomenon is eliminated, and the pump machine body can recover most of the water conveying capacity within a short time without shutdown.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, and in particular to a centrifugal pump with multiple seals. Background Art

[0002] A centrifugal pump generates centrifugal force through the high-speed rotation of the impeller, draws external liquid into the pump, and throws it out of the outside world.

[0003] When a small centrifugal pump is pumping water in a pond or ditch, it is easy to draw aquatic plants or aquatic plant tissues in the water into the pump. The existing method is usually to set a filter structure to filter and intercept them. However, as the centrifugal pump is continuously used, the filter structure is easily blocked by the aquatic plants or aquatic plant tissues in the water, which reduces the water delivery capacity of the centrifugal pump. In addition, if the blockage is serious, the pump needs to be shut down for unblocking and maintenance, which affects the water delivery efficiency of the centrifugal pump. Summary of the invention

[0004] In order to overcome the shortcomings that the filtering structure is easily clogged by aquatic plants or aquatic plant tissues in the water, which reduces the water delivery capacity of the centrifugal pump and requires shutdown for dredging and maintenance if the clog is serious, thus affecting the water delivery efficiency of the centrifugal pump, the present invention provides a centrifugal pump with multiple seals.

[0005] The technical solution is: a centrifugal pump with multiple seals, including a pump body, a water inlet pipe and a water outlet pipe; the pump body is connected to the water inlet pipe; the pump body is connected to the water outlet pipe; it also includes a rotating unit, a filter screen, a movable rod, a mounting rod, a stirring rod and a cutting component; the water inlet pipe is provided with an observation window; a sealing sleeve is provided through the water inlet pipe; a movable rod is slidably provided in the sealing sleeve; the movable rod is divided into a fixed part and a rotating part, the two are rotatably connected, wherein the fixed part slides in the sealing sleeve, the movable rod rotating part is located in the water inlet pipe, and the surface of the area where the movable rod fixed part is located outside the sealing sleeve is provided with a marking line; the water inlet pipe is provided with a sealing sleeve; the inside of the water inlet pipe is provided with a sealing sleeve; the movable rod is provided with a sealing sleeve; the inside of the water inlet pipe is provided with a sealing sleeve; the sealing sleeve ... A filter screen is arranged, and a key groove is opened in the area where the filter screen is penetrated by the surface of the rotating part of the movable rod and a spline shaft is installed. The center of the filter screen is in a vacant state, and a circular ring is installed in the vacant place. The outer sleeve rotating part of the spline shaft is rotatably connected with the circular ring in the vacant part of the filter screen; the rotating part of the movable rod is connected with a rotating unit for driving the rotating part of the movable rod to rotate, and the rotating unit is located on the left side of the filter screen; the rotating part of the movable rod is opened with a plurality of sockets; each socket is connected with a mounting rod; each mounting rod is detachably connected with a plurality of stirring rods, and the end of the stirring rod away from the mounting rod is set as an elbow; the rotating part of the movable rod is connected with a cutting component for cutting aquatic plants.

[0006] As an improvement to the above scheme, it also includes a pressing rod, a spring and an insert block; each mounting rod is slidably connected to a pressing rod; each socket is fixed with a number of symmetrically distributed springs; all springs on the same side of the socket are fixed with an insert block; each mounting rod has two slots on the lower side for accommodating the insert block and forming a locking fit with the insert block; the pressing rod and the insert block are respectively provided with wedge surfaces that can form a wedge fit with each other.

[0007] As an improvement of the above scheme, the rotating unit includes a clamping ring, a sliding ring, blades, a convex column, a fixed ring, a top block, a long limit strip and a short limit strip; a clamping ring with a groove is provided on the surface of the rotating part of the movable rod, and the clamping ring is located on the side of the filter screen; the water inlet pipe is slidably connected with the fixed ring; a plurality of blades are rotatably connected with the inner ring surface of the fixed ring, and the ends of all blades away from the fixed ring are rotatably connected with the sliding ring, and a torsion spring is connected between the two; a plurality of protrusions are protruded on the inner ring surface of the sliding ring toward the center of the water inlet pipe, and the protrusions are slidably connected with the rotating part of the movable rod; a avoidance A groove to avoid collision with the protrusion; the end of the blade close to the center of the water inlet pipe will not contact the clamping ring; each blade is fixedly connected to a top block at the end close to the center of the water inlet pipe; the inner side of the sliding ring is fixedly connected with a number of protrusions equal to the number of blades, and each top block surface is provided with a receiving groove, and each protrusion is slidably connected to the receiving groove of the corresponding top block; the surface of the clamping ring is fixedly connected with a number of long limit strips equal to the number of blades; the surface of the clamping ring is fixedly connected with a number of short limit strips equal to the number of blades; a long limit strip and a short limit strip form a group, which together realize the function of driving the blades to rotate.

[0008] As an improvement of the above solution, a protective cover is also included; the protective cover is fixedly connected to one side of the rotating part of the movable rod close to the inlet of the water inlet pipe, and the protective cover is in contact with the sliding ring.

[0009] As an improvement of the above solution, the protective cover is configured to be conical.

[0010] As an improvement of the above solution, the spacing between the long limit strip and the short limit strip responsible for regulating the same blade is equal to the width of the top block.

[0011] As an improvement of the above scheme, the cutting component includes a rotating roller, a bevel gear, a bevel gear ring and a scraper; another rotating unit is connected to the rotating part of the movable rod, and the two rotating units are distributed on both sides of the filter screen; the rotating part of the movable rod is rotatably connected to the rotating roller; the end of the rotating roller away from the movable rod is fixedly connected to the bevel gear; a bevel gear ring is arranged on the side of the filter screen away from the stirring rod, and the bevel gear ring corresponds to the bevel gear; a number of scrapers are fixedly connected to the surface of the rotating roller.

[0012] As an improvement of the above scheme, it also includes hooks and needles; a plurality of hooks and needles are arranged on the surface of the rotating roller.

[0013] As an improvement of the above scheme, it also includes a collecting net; the movable part of the movable rod is fixedly connected with the collecting net, the rotating roller is located between the filter net and the collecting net, and the collecting net is in contact with the hook hair.

[0014] As an improvement of the above scheme, it also includes an elastic isolation cover; the movable rod is fixedly connected with the elastic isolation cover for isolating the spline shaft portion of the movable rod, and the elastic isolation cover is in contact with the surface of the filter screen.

[0015] The present invention has the following advantages: by manually pulling the movable rod, the stirring rod is driven to move to temporarily separate and clean the aquatic plants or aquatic plant tissues and water plants entangled on the surface of the filter screen, thereby eliminating the blockage phenomenon and allowing the pump body to restore most of the water delivery capacity in a short time without stopping. The flow of water is used as the power to realize the winding action, and there is no need to install additional power structures such as motors, and the overall structure is simpler.

[0016] The ends of the water plants are hooked up by the hooks on the rotating roller, and as the rotating roller continues to rotate, the ends of the water plants are straightened and attached to the surface of the rotating roller. Then, as the scraper rotates, the straightened ends of the water plants are cut off, so that the scraper can fully cut the ends of the water plants wrapped around the right side surface of the filter, ensuring that the subsequent stirring rod can remove the water plants gathered on the left side surface of the filter.

[0017] An elastic isolation cover is arranged at the spline shaft of the movable rod, and the spline shaft of the movable rod is wrapped by the elastic isolation cover to prevent aquatic plants or aquatic plant tissues in the water from entering the slide groove of the spline shaft and affecting the movement of the movable rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure disclosed by the centrifugal pump with multiple seals of the present invention; Figure 2 It is a schematic diagram of the structure inside the water inlet pipe disclosed by the centrifugal pump with multiple seals of the present invention; Figure 3 A schematic diagram of the combined structure of the filter screen, the movable rod, the mounting rod and the stirring rod disclosed in the centrifugal pump with multiple seals of the present invention; Figure 4 for Figure 3 A magnified view of point A; Figure 5 A schematic diagram of the combined structure of the filter screen, movable rod, blade, fixed ring and collection screen disclosed in the centrifugal pump with multiple seals of the present invention; Figure 6 for Figure 5 The enlarged view of point B; Figure 7 A schematic diagram of the combined structure of the rotating roller and the collecting net disclosed in the centrifugal pump with multiple seals of the present invention; Figure 8It is a schematic diagram of the combined structure of the rotating roller, bevel gear, bevel gear ring, hook and scraper disclosed in the centrifugal pump with multiple seals of the present invention; Fig. 9 The present invention is a schematic diagram of the combined structure of a filter screen, a movable rod and an elastic isolation cover disclosed in the centrifugal pump with multiple seals.

[0019] The reference numbers in the figure are as follows: 1-pump body, 2-water inlet pipe, 21-observation window, 22-sealing sleeve, 3-water outlet pipe, 4-filter screen, 5-movable rod, 51-clamping ring, 6-mounting rod, 61-pressing rod, 62-spring, 63-insertion block, 7-agitation rod, 101-sliding ring, 102-blade, 02-convex column, 103-fixing ring, 104-top block, 105-long limit strip, 106-short limit strip, 107-protective cover, 111-rotating roller, 112-bevel gear, 113-bevel gear ring, 114-hook hair, 115-scraper, 116-collecting net, 201-elastic isolation cover, 501-jack, 601-slot. DETAILED DESCRIPTION

[0020] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0021] Example 1 A centrifugal pump with multiple seals, such as Figure 1-Figure 8 As shown, it includes a pump body 1, a water inlet pipe 2 and a water outlet pipe 3; the pump body 1 is connected to the water inlet pipe 2; the pump body 1 is connected to the water outlet pipe 3; the water inlet pipe 2 and the water outlet pipe 3 are both provided with threads at their pipe openings, and rubber washers are provided at their pipe openings, the external water pipe is connected to the water inlet pipe 2 and the water outlet pipe 3 through the threads, and the connection is sealed by the rubber washers to ensure that there will be no leakage during the pumping process; It also includes a rotating unit, a filter screen 4, a movable rod 5, a mounting rod 6, a stirring rod 7 and a cutting component; an observation window 21 is arranged on the upper part of the water inlet pipe 2; a sealing sleeve 22 is arranged through the water inlet pipe 2; a movable rod 5 is slid through the sealing sleeve 22; the movable rod 5 is divided into a fixed part and a rotating part, and the two are rotatably connected, wherein the fixed part slides in the sealing sleeve 22, the rotating part of the movable rod 5 is located inside the water inlet pipe 2, and a marking line is arranged on the surface of the area where the fixed part of the movable rod 5 is located outside the sealing sleeve 22; a filter screen 4 is arranged inside the water inlet pipe 2, and the surface of the rotating part of the movable rod 5 is penetrated The area of ​​the filter screen 4 is provided with a keyway and a spline shaft is installed. The center of the filter screen 4 is in a vacant state, and a circular ring is installed at the vacant position. The outer sleeve rotating part of the spline shaft is rotatably connected to the circular ring at the vacant position of the filter screen 4; the rotating part of the movable rod 5 is connected to a rotating unit, and the rotating unit is located on the left side of the filter screen 4; the rotating part of the movable rod 5 is provided with three sockets 501 distributed in a circular array; each socket 501 is connected to a mounting rod 6; each mounting rod 6 is threadedly connected to a plurality of stirring rods 7, and the end of the stirring rod 7 away from the mounting rod 6 is set as an elbow; the rotating part of the movable rod 5 is connected to a cutting component.

[0022] It also includes a pressing rod 61, a spring 62 and an insert block 63; each mounting rod 6 is slidably connected to a pressing rod 61; each socket 501 is fixed with a plurality of symmetrically distributed springs 62; all springs 62 on the same side of the socket 501 are fixed with an insert block 63; each mounting rod 6 has two slots 601 on the lower side for accommodating the insert block 63 and forming a locking fit with the insert block 63; the pressing rod 61 and the insert block 63 are respectively provided with wedge surfaces that can form a wedge fit with each other.

[0023] The rotating unit includes a clamping ring 51, a sliding ring 101, blades 102, a convex column 02, a fixing ring 103, a top block 104, a long limit strip 105 and a short limit strip 106; a clamping ring 51 with a notch is provided on the surface of the rotating part of the movable rod 5, and the clamping ring 51 is located on the side of the filter screen 4; the water inlet pipe 2 is slidably connected with the fixing ring 103; three blades 102 distributed in an annular array and arranged radially along the water inlet pipe 2 are rotatably connected to the inner ring surface of the fixing ring 103, and the ends of all blades 102 away from the fixing ring 103 are rotatably connected to the sliding ring 101, and a torsion spring is connected between the two; a plurality of protrusions are protruded from the inner ring surface of the sliding ring 101 toward the center direction of the water inlet pipe 2, and the protrusions are slidably connected to the rotating part of the movable rod 5; a groove is provided on the clamping ring 51 to avoid collision with the protrusions; the end of the blade 102 close to the center direction of the water inlet pipe 2 will not In contact with the clamping ring 51; each blade 102 is fixedly connected to a top block 104 at the end close to the center direction of the water inlet pipe 2; the inner side surface of the sliding ring 101 is fixedly connected with a number of bosses 02 equal to the number of blades 102, and a receiving groove is opened on the surface of each top block 104, and each boss 02 is slidably connected with the receiving groove of the corresponding top block 104; during normal water pumping, the torsion force of the torsion spring between the blade 102 and the sliding ring 101 and the resistance of the boss 02 to the receiving groove on the surface of the top block 104 form a balance, ensuring that the blade 102 is in a state where the impact force of the water flow is minimized; the surface of the clamping ring 51 is fixedly connected with a number of long limit strips 105 equal to the number of blades 102; the surface of the clamping ring 51 is fixedly connected with a number of short limit strips 106 equal to the number of blades 102; a long limit strip 105 and a short limit strip 106 form a group, which together realize the function of driving the blade 102 to rotate.

[0024] It also includes a protective cover 107; the protective cover 107 is fixedly connected to one side of the rotating part of the movable rod 5 close to the entrance of the water inlet pipe 2, and the protective cover 107 is in contact with the sliding ring 101. The clamping ring 51 and the sliding ring 101 are blocked and isolated by the protective cover 107. When pumping water, aquatic plants or aquatic plant tissues in the water are prevented from entering and remaining between the clamping ring 51 and the sliding ring 101.

[0025] The protective cover 107 is set to be in a cone shape. When the water flows through the protective cover 107, the protective cover 107 will not block the water flow, thereby ensuring the normal flow of the water.

[0026] The distance between the long limit bar 105 and the short limit bar 106 responsible for regulating the same blade 102 is equal to the width of the top block 104. When the top block 104 is inserted between the long limit bar 105 and the short limit bar 106, the top block 104 will not be able to rotate, so that the blade 102 can maintain a rotating state.

[0027] The cutting components include a rotating roller 111, a bevel gear 112, a bevel gear ring 113 and a scraper 115; another rotating unit is connected to the rotating part of the movable rod 5, and the two rotating units are distributed on both sides of the filter screen 4; the rotating part of the movable rod 5 is rotatably connected to the rotating roller 111; the end of the rotating roller 111 away from the movable rod 5 is fixedly connected to the bevel gear 112; a bevel gear ring 113 is provided on the side of the filter screen 4 away from the stirring rod 7, and the bevel gear ring 113 corresponds to the bevel gear 112; four scrapers 115 are fixedly connected to the surface of the rotating roller 111.

[0028] It also includes hook hairs 114; a plurality of hook hairs 114 are arranged on the surface of the rotating roller 111, and the hook hairs 114 can hook the water plants and straighten them to facilitate cutting by the scraper 115.

[0029] The movable portion of the movable rod 5 is fixedly connected with the collecting net 116 , the rotating roller 111 is located between the filter net 4 and the collecting net 116 , and the collecting net 116 is in contact with the hook hair 114 .

[0030] During operation, the pump body 1 is first manually placed near the water source. Before the pump body 1 works, the water suction pipe is first manually screwed with the pipe mouth of the water inlet pipe 2, and the water suction pipe is placed in the required water source, and then the corresponding water delivery pipe is screwed with the water outlet pipe 3, and then the pump body 1 is connected to the power supply, and the pump body 1 is controlled to work to draw water from the water source into the pump body 1 from the water inlet pipe 2 through the water suction pipe, and the pumped water is discharged from the water outlet pipe 3 into the water delivery pipe through the impeller inside the pump body 1, and the water is transported to the place where it is needed by the water delivery pipe; at the same time, the pipe mouths of the water inlet pipe 2 and the water outlet pipe 3 are both provided with threads, and rubber washers are provided at the pipe mouths, the external water pipe is connected to the water inlet pipe 2 and the water outlet pipe 3 through threads, and the connection is sealed by rubber washers, and the water inlet pipe 2 and the water outlet pipe 3 are multi-sealed by threads and rubber washers to ensure that no leakage occurs during the pumping process.

[0031] However, during the pumping process of the pump body 1, it is easy to draw aquatic plants or aquatic plant tissues in the water into the pump. When the existing filtering structure filters the aquatic plants or aquatic plant tissues in the water, it is easy to be blocked by the aquatic plants or aquatic plant tissues in the water, which reduces the water delivery capacity of the centrifugal pump, and serious blockage requires shutdown for dredging and maintenance, which affects the water delivery efficiency of the centrifugal pump; therefore, during the pumping process, when the water flows through the water inlet pipe 2, the pumped water is filtered through the filter screen 4 to filter and intercept the aquatic plants or aquatic plant tissues in the water; at the same time, considering that In the process of the filter screen 4 intercepting aquatic plants or aquatic plant tissues in the water, the aquatic plants or aquatic plant tissues gather on the surface of the filter screen 4 and gather together, blocking the filter screen 4, thereby reducing the amount of water discharged from the water pipe and reducing the water delivery efficiency of the pump body 1; therefore, during the use of the pump body 1, when it is found that the amount of water discharged from the water pipe is reduced, the filter screen 4 can be manually observed through the observation window 21 of the water inlet pipe 2 to determine whether the filter screen 4 is blocked. When it is found that the surface of the filter screen 4 is blocked, the movable rod 5 is manually pushed from the outside of the water inlet pipe 2 into the water inlet pipe 2. Figure 3 and Figure 4, the movable rod 5 drives the installation rod 6 and the stirring rod 7 to move in the direction close to the filter screen 4, and stops moving when the clamping ring 51 on the movable rod 5 moves and is completely stuck in the sliding ring 101. At this time, the stirring rod 7 moves to a state very close to the filter screen 4. In the case that aquatic plants or aquatic plant tissues accumulate and block the filter screen 4, the stirring rod 7 can generally be inserted between the aquatic plants or aquatic plant tissues on the surface of the filter screen 4; and, in the process of the clamping ring 51 moving and being stuck in the sliding ring 101, the long limit strip 105 on the clamping ring 51 first pushes the top block 104 on the blade 102, and the top block 104 rotates to make the boss 02 disengage from the receiving groove, the torsion spring is deformed, and the blade 102 rotates from a straight state. When the blade 102 rotates and remains in the tilted state, as the clamping ring 51 continues to move, the short limit strip 106 contacts the blade 102. At this time, the blade 102 and the top block 104 are clamped between the long limit strip 105 and the short limit strip 106, so that the blade 102 rotated into the tilted state is limited and fixed, so that the blade 102 always maintains the tilted state, and the postures of the three groups of blades 102 change at the same time. During this process, the clamping ring 51 does not contact the blade 102 due to its own position, and no obstruction problem occurs; when the blade 102 rotates and remains in the tilted state, as the pump body 1 continues to pump water, when the water flows through the blade 102, it will generate a significant driving force on the blade 102, driving the sliding ring 101, the blade 102 and the fixed The fixed ring 103 rotates, and then due to the engagement relationship between the sliding ring 101 and the clamping ring 51, the rotating part of the movable rod 5, the installation rod 6 and the stirring rod 7 are driven to rotate. The rotation of the stirring rod 7 stirs up the aquatic plants or aquatic plant tissues on the surface of the filter screen 4, and makes the aquatic plants or aquatic plant tissues entangled on the stirring rod 7. As the stirring rod 7 is continuously driven to rotate, the stirring rod 7 winds the aquatic plants or aquatic plant tissues on the surface of the filter screen 4 and gathers them toward the middle of the filter screen 4, so that the aquatic plants or aquatic plant tissues on the surface of the filter screen 4 are shrunk into a ball, reducing the area, so that the filter screen 4 immediately leaves a water flow channel and restores part of the water flow capacity. The stirring rod 7 is provided with an elbow, and the bending direction of the elbow is the same as the rotation direction, and the stirring rod 7 rotates When the filter screen 4 is moved, the aquatic plants or aquatic plant tissues on the surface of the filter screen 4 can be more stably wound on the stirring rod 7 through the elbow, and will not fall off easily to cause winding failure. After a period of treatment, the human can observe from the observation window 21 that the aquatic plants or aquatic plant tissues on the surface of the filter screen 4 are wound, and then the movable rod 5 is manually pulled away from the filter screen 4 to reset, thereby separating the aquatic plants or aquatic plant tissues wound on the stirring rod 7 from the filter screen 4, and completing the cleaning of the aquatic plants or aquatic plant tissues wound on the surface of the filter screen 4; by manually pulling the movable rod 5, the stirring rod 7 is driven to move to temporarily separate and clean the aquatic plants or aquatic plant tissues wound on the surface of the filter screen 4, thereby eliminating the blockage phenomenon;Compared with the method of cutting with a knife, as long as the machine is not stopped after cutting, the aquatic plants or aquatic plant tissues will still be impacted by the water flow and adhere to the surface of the filter screen 4, which cannot fundamentally eliminate the blockage phenomenon. Moreover, the movement of the cutter is not easy to change the distribution position of the aquatic plants or aquatic plant tissues on the surface of the filter screen 4, so it is also difficult to release part of the filter screen 4 surface in a short time to restore part of the water delivery capacity; the present invention allows the pump body 1 to restore most of the water delivery capacity in a short time without stopping the machine, and uses the flow of water as the power to realize the winding action, without installing additional power structures such as motors, and the overall structure is simpler. ;

[0032] The movable rod 5 is moved away from the filter screen 4, so that the clamping ring 51 moves away from the sliding ring 101. After the clamping ring 51 is separated from the sliding ring 101, the long limit bar 105 and the short limit bar 106 stop limiting the blade 102. The blade 102 is reset under the action of the torsion spring and rotates again to a straight state parallel to the water inlet pipe 2. The top block 104 rotates and resets, and the protrusion 02 re-enters the receiving groove on the surface of the top block 104. At this time, the torsion spring still has torsion. Through the torsion of the torsion spring and the blocking effect of the protrusion 02, the blade 102 remains straight and motionless in the water to prevent water flow. When passing by, the blade 102 will swing; and, a protective cover 107 is provided on the movable rod 5, through which the retaining ring 51 and the sliding ring 101 can be wrapped, which can prevent aquatic plants or aquatic plant tissues in the water from entering and remaining between the retaining ring 51 and the sliding ring 101, thereby reducing the probability of aquatic plants or aquatic plant tissues entering such relatively narrow and complex areas of the spatial structure, reducing the difficulty of device maintenance, and the cone itself is a cone-like shape, and the cone surface is arranged along the water flow, which can minimize the aquatic plants or aquatic plant tissues from being hung and accumulated on its own surface, affecting its use.

[0033] In actual use, in order to briefly describe the filtration and water flow efficiency, the filter screen 4 is generally designed to have as large a mesh size as possible to improve the water flow efficiency while being able to intercept aquatic plants or aquatic plant tissues; therefore, when the aquatic plants or aquatic plant tissues are intercepted by the filter screen 4, some of the thin strips of aquatic plants or aquatic plant tissues will easily pass through the filter screen 4 to the other end, and under the action of the water flow, these thin strips of branches will be entangled with each other. When the aquatic plants or aquatic plant tissues are subsequently stirred up and pulled out for cleaning by the stirring rod 7, the thin strips of branches will be entangled with each other on the other side of the filter screen 4. It is more difficult to remove and clean the aquatic plants or aquatic plant tissues by the stirring rod 7, and forcible pulling away may easily damage the filter screen 4 itself; therefore, when a thin strip-like branch appears on one side of the filter screen 4 through the observation window 21, the movable rod 5 is first pulled by the human to move, and the movable rod 5 drives the rotating roller 111 to move, so that the hook hair 114 and the scraper 115 on the rotating roller 111 contact the surface of the filter screen 4, and at the same time the bevel gear 112 and the bevel gear ring 113 are meshed, and at the same time the clamping ring 51 on the movable rod 5 close to the rotating roller 111 is driven to move and clamp into the sliding ring 101 close to the rotating roller 111, and the same principle as above is used. The movable rod 5 is driven by the mechanism to rotate in the same direction, and the movable rod 5 drives the rotating roller 111 to revolve around the filter screen 4 and sweep the entire surface of the filter screen 4, and the movable bevel gear 112 is meshed with the fixed bevel gear ring 113 to drive the rotating roller 111 to rotate while revolving. When the rotating roller 111 rotates, the thin strip branches are hooked up by the hook hairs 114 on the rotating roller 111, and as the rotating roller 111 continues to rotate, the thin strip branches are straightened, and then as the scraper 115 rotates, the straightened thin strip branches are cut off, so that the scraper 115 can cut off the thin strip branches more easily. If there is no hook hair 114, the thin strip branches will be cut off. The branches are more likely to have poor cutting effect of the scraper 115 due to their small size, swinging with the water and smooth surface, thereby ensuring that the subsequent stirring rod 7 can remove the aquatic plants or aquatic plant tissues gathered on the surface of the filter screen 4; if the cut thin strip branches are not entangled by the hooks and needles 114, they can also be intercepted and collected by the collecting net 116, and the collecting net 116 will also be in contact with the hooks and needles 114 in spatial position, so during the rotation of the rotating roller 111, the aquatic plants or aquatic plant tissues intercepted and collected on the surface of the collecting net 116 can also be stirred, so that they are re-entangled and gathered on the hooks and needles 114, which is convenient for subsequent cleaning.

[0034] It should be noted that the movable rod 5 passes through the water inlet pipe 2 through the sealing sleeve 22, and the surface of the movable rod 5 outside the sealing sleeve 22 is provided with markings. In the process of pulling the movable rod 5 to move, the connection between the movable rod 5 and the water inlet pipe 2 is sealed by the sealing sleeve 22 to avoid water leakage; and when manually pulling the movable rod 5 to move, the relative position between the markings set on the surface of the movable rod 5 and the end of the sealing sleeve 22 can be compared to determine the pulling distance of the movable rod 5, to ensure that when the movable rod 5 is pulled to move, the corresponding retaining ring 51 and the sliding ring 101 can be driven to fit each other correctly.

[0035] After all the work is completed and the pump body 1 stops working, the water inlet pipe 2 can be manually disassembled, and then the aquatic plants or aquatic plant tissues can be directly separated from the stirring rod 7 and the hook hair 114; if the stirring rod 7 needs to be disassembled, the person only needs to press the pressing rod 61, such as Figure 5 and Figure 6 As shown, the pressing rod 61 moves downward to push the insert block 63 out of the slot 601, so that the mounting rod 6 is no longer restricted. The mounting rod 6 is then manually pulled out of the socket 501, and the mounting rod 6 and the stirring rod 7 are taken out, thereby facilitating the cleaning and removal of the aquatic plants or aquatic plant tissues entangled on the stirring rod 7. The mounting rod 6 and the stirring rod 7 can be quickly disassembled by manually pressing the pressing rod 61, which makes the component easy to replace compared to the installation using bolts.

[0036] Example 2 On the basis of Example 1, Figure 3 and Fig. 9 As shown, an elastic isolation cover 201 is also included; the movable rod 5 is fixedly connected with the elastic isolation cover 201, and the elastic isolation cover 201 is in contact with the surface of the filter screen 4.

[0037] On the basis of the above-mentioned embodiment 1, by pushing the movable rod 5 to move, the surface of the filter screen 4 can be cleaned to ensure the normal passage of water flow, and Figure 8As shown, the matching state of the filter screen 4, the spline shaft, and the movable rod 5, the spline shaft structure, the rotating structure of the outer sleeve rotating part of the spline shaft and the circular ring at the center of the filter screen 4 are all prior arts and will not be repeated here. When pumping water, aquatic plants or aquatic plant tissues may come into contact with the spline shaft, and after accumulation, they will hinder the normal use of the spline shaft, and further affect the subsequent cleaning of the surface of the filter screen 4. Therefore, an elastic isolation cover 201 is provided at the spline shaft of the movable rod 5, and the spline shaft of the movable rod 5 is surrounded by the elastic isolation cover 201 to prevent the aquatic plants or aquatic plant tissues sucked from accumulating on the spline shaft with the water flow, thereby affecting the movement of the movable rod 5; and, when the movable rod 5 moves, the movable rod 5 drives the elastic isolation cover 201 to move, and the elastic isolation cover 201 is deformed, stretched or contracted, and is always connected to the surface of the filter screen 4 to surround the spline shaft of the movable rod 5 to prevent the aquatic plants or aquatic plant tissues in the water from coming into contact with the spline shaft, thereby affecting the movement of the movable rod 5.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump with multiple seals, comprising a pump body (1), a water inlet pipe (2) and a water outlet pipe (3); the pump body (1) is connected to the water inlet pipe (2); the pump body (1) is connected to the water outlet pipe (3); the characteristics are: The invention also comprises a rotating unit, a filter screen (4), a movable rod (5), a mounting rod (6), a stirring rod (7) and a cutting component; the water inlet pipe (2) is provided with an observation window (21); a sealing sleeve (22) is provided through the water inlet pipe (2); a movable rod (5) is slidably provided through the sealing sleeve (22); the movable rod (5) is divided into a fixed part and a rotating part, and the two parts are rotatably connected, wherein the fixed part slides in the sealing sleeve (22), the rotating part of the movable rod (5) is located inside the water inlet pipe (2), and a marking line is provided on the surface of the area where the fixed part of the movable rod (5) is located outside the sealing sleeve (22); a filter screen (4) is provided inside the water inlet pipe (2), and the surface of the rotating part of the movable rod (5) penetrates the filter screen (4). ) is provided with a keyway and a spline shaft is installed, the center of the filter screen (4) is in a vacant state, and a circular ring is installed at the vacant position, and the outer sleeve rotating member of the spline shaft is rotatably connected to the circular ring at the vacant position of the filter screen (4); the movable rod (5) rotating portion is connected to a rotating unit for driving the movable rod (5) rotating portion to rotate, and the rotating unit is located on the left side of the filter screen (4); the movable rod (5) rotating portion is provided with a plurality of plug holes (501); each plug hole (501) is connected to a mounting rod (6); each mounting rod (6) is detachably connected to a plurality of stirring rods (7), and the end of the stirring rod (7) away from the mounting rod (6) is arranged as an elbow; the movable rod (5) rotating portion is connected to a cutting component for cutting water plants.

2. A centrifugal pump with multiple seals according to claim 1, characterized in that: The invention also comprises a pressing rod (61), a spring (62) and an insert block (63); each mounting rod (6) is slidably connected to a pressing rod (61); each insertion hole (501) is fixedly connected to a plurality of symmetrically distributed springs (62); all springs (62) on the same side of the insertion hole (501) are fixedly connected to an insert block (63); each mounting rod (6) has two slots (601) on the lower side for accommodating the insert block (63) and forming a locking fit with the insert block (63); the pressing rod (61) and the insert block (63) are respectively provided with wedge-shaped surfaces capable of forming a wedge-shaped fit with each other.

3. A centrifugal pump with multiple seals according to claim 1, characterized in that: The rotating unit comprises a clamping ring (51), a sliding ring (101), blades (102), a convex column (02), a fixing ring (103), a top block (104), a long limit strip (105) and a short limit strip (106); a clamping ring (51) with a notch is arranged on the surface of the rotating part of the movable rod (5), and the clamping ring (51) is located on the side of the filter screen (4); the water inlet pipe (2) is slidably connected with the fixing ring (103); a plurality of blades (102) are rotatably connected to the inner ring surface of the fixing ring (103), and the ends of all the blades (102) away from the fixing ring (103) are rotatably connected to the sliding ring (101), and a torsion spring is connected between the two; a plurality of convex blocks are protruded on the inner ring surface of the sliding ring (101) toward the center direction of the water inlet pipe (2), and the convex blocks are slidably connected to the rotating part of the movable rod (5); a convex block is provided on the clamping ring (51) to avoid contact with the convex block. The ends of the blades (102) close to the center direction of the water inlet pipe (2) will not contact the clamping ring (51); each end of the blades (102) close to the center direction of the water inlet pipe (2) is fixedly connected to a top block (104); the inner side surface of the sliding ring (101) is fixedly connected with a number of convex columns (02) equal to the number of blades (102); the surface of each top block (104) is provided with a receiving groove, and each convex column (02) is slidably connected to the receiving groove of the corresponding top block (104); the surface of the clamping ring (51) is fixedly connected with a number of long limit strips (105) equal to the number of blades (102); the surface of the clamping ring (51) is fixedly connected with a number of short limit strips (106) equal to the number of blades (102); a long limit strip (105) and a short limit strip (106) form a group, and together realize the function of driving the blades (102) to rotate.

4. A centrifugal pump with multiple seals according to claim 3, characterized in that: It also includes a protective cover (107); the protective cover (107) is fixedly connected to one side of the rotating part of the movable rod (5) close to the inlet of the water inlet pipe (2), and the protective cover (107) is in contact with the sliding ring (101).

5. A centrifugal pump with multiple seals according to claim 4, characterized in that: The protective cover (107) is configured in a cone shape.

6. A centrifugal pump with multiple seals according to claim 3, characterized in that: The distance between the long limit strip (105) and the short limit strip (106) responsible for regulating the same blade (102) is equal to the width of the top block (104).

7. A centrifugal pump with multiple seals according to claim 1, characterized in that: The cutting component comprises a rotating roller (111), a bevel gear (112), a bevel gear ring (113) and a scraper (115); the rotating part of the movable rod (5) is connected to another rotating unit, and the two rotating units are distributed on both sides of the filter screen (4); the rotating part of the movable rod (5) is rotatably connected to the rotating roller (111); the end of the rotating roller (111) away from the movable rod (5) is fixedly connected to the bevel gear (112); the side of the filter screen (4) away from the stirring rod (7) is provided with a bevel gear ring (113), and the bevel gear ring (113) corresponds to the bevel gear (112); and a plurality of scrapers (115) are fixedly connected to the surface of the rotating roller (111).

8. A centrifugal pump with multiple seals according to claim 7, characterized in that: It also includes hooks and needles (114); a plurality of hooks and needles (114) are arranged on the surface of the rotating roller (111).

9. A centrifugal pump with multiple seals according to any one of claims 7-8, characterized in that: It also includes a collecting net (116); the movable portion of the movable rod (5) is fixedly connected to the collecting net (116); the rotating roller (111) is located between the filter net (4) and the collecting net (116), and the collecting net (116) is in contact with the hook hair (114).

10. A centrifugal pump with multiple seals according to claim 1, characterized in that: It also includes an elastic isolation cover (201); the movable rod (5) is fixedly connected with the elastic isolation cover (201) for isolating the spline shaft portion of the movable rod (5), and the elastic isolation cover (201) is in contact with the surface of the filter screen (4).

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