A centrifugal pump with multiple seals

Abstract

The present invention relates to the technical field of centrifugal pumps, and particularly to a centrifugal pump with multiple seals, including a pump body, a water inlet pipe, a water outlet pipe, a movable rod, etc.; the pump body is communicated with the water inlet pipe; the pump body is communicated with the water outlet pipe; the water inlet pipe is provided with an observation window; the water inlet pipe is provided with a sealing sleeve in a penetrating manner; a movable rod slides through the sealing sleeve in a penetrating manner; the movable rod 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, and the rotating part of the movable rod is located inside the water inlet pipe. By manually driving and pulling the movable rod, the stirring rod is driven to move to temporarily separate and clean the aquatic plants or aquatic plant tissues such as waterweeds wound on the surface of the filter screen, eliminating the blockage phenomenon, and enabling the pump body to restore most of its water delivery capacity in a short time without stopping the machine.

Description

Technical Field

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

[0002] A centrifugal pump generates centrifugal force through the high-speed rotation of an impeller, sucks external liquid into the pump, and discharges it to the outside.

[0003] When a small centrifugal pump pumps water in a pond or ditch, it is very easy to suck aquatic plants or aquatic plant tissues in the water into the pump. Currently, a filtering structure is usually set up to filter and intercept them. However, as the centrifugal pump continues to be used, the set filtering structure is easily blocked by aquatic plants or aquatic plant tissues in the water, reducing the water conveyance capacity of the centrifugal pump. Moreover, when the blockage is severe, it is necessary to stop the machine for dredging and maintenance, which affects the water conveyance efficiency of the centrifugal pump. Summary of the Invention

[0004] In order to overcome the drawbacks that the set filtering structure is easily blocked by aquatic plants or aquatic plant tissues in the water, reducing the water conveyance capacity of the centrifugal pump, and when the blockage is severe, it is necessary to stop the machine for dredging and maintenance, affecting the water conveyance efficiency of the centrifugal pump, the present invention provides a centrifugal pump with multiple seals.

[0005] The technical solution is as follows: A centrifugal pump with multiple seals includes 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 further 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; the water inlet pipe is provided with a sealing sleeve in a penetrating manner; a movable rod slides through the sealing sleeve in a penetrating manner; the movable rod is divided into a fixed part and a rotating part, and the two are rotatably connected, where the fixed part slides in the sealing sleeve, the rotating part of the movable rod is located inside the water inlet pipe, and a marking line is provided on the surface of the area where the fixed part of the movable rod is located outside the sealing sleeve; a filter screen is arranged inside the water inlet pipe, and a keyway is opened in the area where the rotating part of the movable rod penetrates the filter screen and a spline shaft is installed. The center of the filter screen is in a vacant state, and a circular ring is installed at the vacant position. The rotating member outside the spline shaft is rotatably connected to the circular ring at the vacant position of the filter screen; the rotating part of the movable rod is connected to 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; several jacks are opened on the rotating part of the movable rod; each jack is connected to a mounting rod; each mounting rod is detachably connected to several stirring rods, and the end of the stirring rod far from the mounting rod is set as an elbow; the rotating part of the movable rod is connected to a cutting component for cutting aquatic plants.

[0006] As an improvement to the above solution, it further includes a pressing rod, a spring, and a plug; each mounting rod is slidably connected through a pressing rod; several symmetrically distributed springs are fixedly connected in each jack; all the springs on the same side in the jack are fixedly connected to a plug together; two slots for accommodating the plug and forming a locking fit with the plug are respectively opened on the lower side of each mounting rod; wedge surfaces capable of forming a wedge fit with each other are respectively arranged on the pressing rod and the plug.

[0007] As an improvement to the above solution, the rotating unit includes a snap ring, a sliding ring, blades, convex columns, a fixed ring, a top block, a long limiting strip, and a short limiting strip; a snap ring with a notch is arranged on the surface of the rotating part of the movable rod, and the snap ring is located on the side of the filter net; a fixed ring is slidably connected to the water inlet pipe; several blades are rotatably connected to the inner ring surface of the fixed ring, and the end parts of all the blades far away from the fixed ring are rotatably connected to a sliding ring, and a torsion spring is connected between the two; several convex blocks protrude from the inner ring surface of the sliding ring towards the center of the water inlet pipe, and the convex blocks are slidably connected to the rotating part of the movable rod; a channel for avoiding collision with the convex blocks is opened on the snap ring; the end of each blade close to the center of the water inlet pipe will not contact the snap ring; a top block is fixedly connected to the end of each blade close to the center of the water inlet pipe; convex columns equal in number to the blades are fixedly connected to the inner side surface of the sliding ring, a receiving groove is opened on the surface of each top block, and each convex column is respectively slidably connected to the receiving groove of the corresponding top block; long limiting strips equal in number to the blades are fixedly connected to the surface of the snap ring; short limiting strips equal in number to the blades are fixedly connected to the surface of the snap ring; one long limiting strip and one short limiting strip form a group to jointly drive the blades to rotate.

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

[0009] As an improvement to the above solution, the protective cover is set in a conical shape.

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

[0011] As an improvement to the above solution, the cutting component includes a rotating roller, bevel gears, 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 net; the rotating part of the movable rod is rotatably connected to a rotating roller; a bevel gear is fixedly connected to the end of the rotating roller far away from the movable rod; a bevel gear ring is arranged on the side of the filter net facing away from the stirring rod, and the bevel gear ring corresponds to the bevel gear; several scrapers are fixedly connected to the surface of the rotating roller.

[0012] As an improvement to the above solution, it further includes barbs; several barbs are arranged on the surface of the rotating roller.

[0013] As an improvement to the above solution, it further includes a collection net; the movable part of the movable rod is fixedly connected with the collection net, the rotating roller is located between the filter net and the collection net, and the collection net is in contact with the hooked hairs.

[0014] As an improvement to the above solution, it further includes an elastic isolation cover; the movable rod is fixedly connected with an elastic isolation cover for isolating the spline shaft part of the movable rod, and the elastic isolation cover is attached to the surface of the filter net.

[0015] The present invention has the following advantages: By manually driving and pulling the movable rod, the stirring rod is driven to move to temporarily separate and clean the aquatic plants or aquatic plant tissues such as waterweeds wound on the surface of the filter net, eliminating the blockage phenomenon, and enabling the pump body to recover most of its water delivery capacity in a short time without stopping the machine, and using the water flow as the power to realize the winding action, without installing additional power structures such as motors, and the overall structure is simpler.

[0016] The end of the waterweed is hooked by the hooked hairs on the rotating roller, and as the rotating roller continues to rotate, the end of the waterweed is straightened and attached to the surface of the rotating roller. Then, as the scraper rotates, the straightened end of the waterweed is cut off, enabling the scraper to fully cut the end of the waterweed wound on the right side surface of the filter net, ensuring that the subsequent stirring rod can remove the waterweeds accumulated on the left side surface of the filter net.

[0017] An elastic isolation cover is provided at the spline shaft of the movable rod. 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 chute of the spline shaft and affecting the movement of the movable rod. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the centrifugal pump with multiple seals disclosed in the present invention;

[0019] Figure 2 It is a schematic structural diagram of the interior of the water inlet pipe of the centrifugal pump with multiple seals disclosed in the present invention;

[0020] Figure 3 It is a schematic structural diagram of the combination of the filter net, movable rod, mounting rod and stirring rod of the centrifugal pump with multiple seals disclosed in the present invention;

[0021] Figure 4 It is Figure 3 the enlarged view of A;

[0022] Figure 5 It is a schematic structural diagram of the combination of the filter net, movable rod, blade, fixed ring and collection net of the centrifugal pump with multiple seals disclosed in the present invention;

[0023] Figure 6 It is Figure 5 the enlarged view of B;

[0024] 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;

[0025] Figure 8 It 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;

[0026] Figure 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.

[0027] 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

[0028] 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.

[0029] Example 1

[0030] A centrifugal pump with multiple seals, such as Figures 1 - 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;

[0031] It further 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; the water inlet pipe 2 is provided with a sealing sleeve 22 in a penetrating manner; a movable rod 5 is slidably penetrated in 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 a key groove is formed and a spline shaft is installed in the area where the rotating part of the movable rod 5 penetrates through the filter screen 4. The center of the filter screen 4 is in a vacant state, and a circular ring is installed at the vacant position. The rotating part of the spline shaft is rotatably connected with the circular ring at the vacant position of the filter screen 4; the rotating part of the movable rod 5 is connected with a rotating unit, and the rotating unit is located on the left side of the filter screen 4; three insertion holes 501 distributed in an annular array are formed in the rotating part of the movable rod 5; each insertion hole 501 is connected with a mounting rod 6; several stirring rods 7 are threadedly connected to each mounting rod 6, and the end of the stirring rod 7 away from the mounting rod 6 is provided with an elbow; the rotating part of the movable rod 5 is connected with a cutting component.

[0032] It further includes a pressing rod 61, a spring 62 and a plug 63; each mounting rod 6 is slidably penetrated with a pressing rod 61; several symmetrically distributed springs 62 are fixedly connected in each insertion hole 501; all the springs 62 on the same side in the insertion hole 501 are jointly fixedly connected with a plug 63; two slots 601 for accommodating the plug 63 and forming a locking fit with the plug 63 are formed in the lower side of each mounting rod 6; wedge surfaces capable of forming a wedge fit with each other are arranged on the pressing rod 61 and the plug 63 respectively.

[0033] The rotating unit includes a snap ring 51, a sliding ring 101, blades 102, a convex post 02, a fixing ring 103, a top block 104, a long limiting strip 105 and a short limiting strip 106; a snap ring 51 with a notch is arranged on the surface of the rotating part of the movable rod 5, and the snap ring 51 is located on the side of the filter net 4; the water inlet pipe 2 is slidably connected with a 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 circumferential surface of the fixing ring 103, and the ends of all the blades 102 away from the fixing ring 103 are rotatably connected with a sliding ring 101, and a torsion spring is connected between the two; several convex blocks protrude from the inner circumferential surface of the sliding ring 101 towards the center of the water inlet pipe 2, and the convex blocks are slidably connected with the rotating part of the movable rod 5; a channel for avoiding collision with the convex blocks is arranged on the snap ring 51; the end of each blade 102 close to the center of the water inlet pipe 2 will not contact the snap ring 51; a top block 104 is fixedly connected to the end of each blade 102 close to the center of the water inlet pipe 2; the inner side surface of the sliding ring 101 is fixedly connected with convex posts 02 equal in number to the blades 102, a receiving groove is arranged on the surface of each top block 104, and each convex post 02 is slidably connected with the receiving groove of the corresponding top block 104; during normal pumping, the torsion of the torsion spring between the blade 102 and the sliding ring 101 forms a balance with the resistance of the convex post 02 to the receiving groove on the surface of the top block 104, ensuring that the blade 102 is in the state with the minimum water flow impact force; a long limiting strip 105 equal in number to the blades 102 is fixedly connected to the surface of the snap ring 51; a short limiting strip 106 equal in number to the blades 102 is fixedly connected to the surface of the snap ring 51; a long limiting strip 105 and a short limiting strip 106 form a group to jointly realize the function of driving the blade 102 to rotate.

[0034] It further includes a protective cover 107; a 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 contacts the sliding ring 101. The snap ring 51 and the sliding ring 101 are blocked and isolated by the protective cover 107. During pumping, aquatic plants or aquatic plant tissues in the water are prevented from entering and remaining between the snap ring 51 and the sliding ring 101.

[0035] The protective cover 107 is arranged in a conical shape. When water flows through the protective cover 107, the protective cover 107 will not block the water flow, ensuring the normal flow of the water flow.

[0036] The distance between the long limiting strip 105 and the short limiting strip 106 responsible for regulating the same blade 102 is equal to the width of the top block 104. When the top block 104 is stuck between the long limiting strip 105 and the short limiting strip 106, the top block 104 cannot rotate, enabling the blade 102 to maintain a rotating state.

[0037] The cutting component includes a rotating roller 111, bevel gears 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; a bevel gear 112 is fixedly connected to the end of the rotating roller 111 away from the movable rod 5; a bevel gear ring 113 is arranged on the side of the filter screen 4 facing 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.

[0038] It further 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 aquatic plants and straighten them, facilitating the cutting by the scraper 115.

[0039] It further includes a collection net 116; the collection net 116 is fixedly connected to the movable part of the movable rod 5, the rotating roller 111 is located between the filter screen 4 and the collection net 116, and the collection net 116 is in contact with the hook hairs 114.

[0040] During operation, first, the pump body 1 is placed near the water source by manual. Before the pump body 1 works, the water suction pipe is first screwed to the nozzle of the water inlet pipe 2 manually, and the water suction pipe is placed into the required water source. Then, the corresponding water delivery pipe is screwed to the water outlet pipe 3. Then, the pump body 1 is powered on, and the pump body 1 is controlled to work to pump the water in the water source through the water suction pipe from the water inlet pipe 2 into the interior of the pump body 1, and the water pumped in is discharged into the water delivery pipe from the water outlet pipe 3 through the impeller inside the pump body 1, and the water is conveyed to the place where it is needed by the water delivery pipe; at the same time, threads are provided at the nozzles of both the water inlet pipe 2 and the water outlet pipe 3, and rubber gaskets are provided at the nozzles. The external water pipes are connected to the water inlet pipe 2 and the water outlet pipe 3 through the threads, and the rubber gaskets are used to seal the connection points. Multiple seals are performed on the water inlet pipe 2 and the water outlet pipe 3 through the threads and the rubber gaskets to ensure that there is no water leakage during the water pumping process.

[0041] However, during the water pumping process of the pump body 1, it is very easy to pump 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 easily blocked by the aquatic plants or aquatic plant tissues in the water, resulting in a reduction in the water conveyance capacity of the centrifugal pump. In severe cases of blockage, it is necessary to stop the machine for dredging and maintenance, which affects the water conveyance efficiency of the centrifugal pump. Therefore, during the water pumping process, when the water flows through the water inlet pipe 2, the water pumped in is filtered by the filter screen 4 to intercept the aquatic plants or aquatic plant tissues in the water. At the same time, considering that during the process of the filter screen 4 intercepting the aquatic plants or aquatic plant tissues in the water, the aquatic plants or aquatic plant tissues will aggregate with each other on the surface of the filter screen 4, blocking the filter screen 4, and then reducing the amount of water discharged from the water delivery pipe and lowering the water conveyance 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 delivery pipe decreases, the operator can observe the filter screen 4 through the observation window 21 of the water inlet pipe 2 to judge whether the filter screen 4 is blocked. When it is found that the surface of the filter screen 4 is blocked, the operator can push the movable rod 5 outside the water inlet pipe 2 into the water inlet pipe 2 for reference 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 cutting method using a knife, as long as the machine does not stop 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, and the blockage phenomenon cannot be fundamentally eliminated. Moreover, the movement of the cutting knife is not easy to change the distribution position of the aquatic plants or aquatic plant tissues on the surface of the filter screen 4. Therefore, it is also very difficult to release part of the surface of the filter screen 4 in a short time to restore part of the water conveyance capacity. The present invention enables the pump body 1 to restore most of the water conveyance capacity in a short time without stopping the machine, and uses the water flow as the power to achieve the winding action, without installing additional power structures such as motors, and the overall structure is simpler.

[0042] And move the movable rod 5 away from the filter screen 4, so that the snap ring 51 moves away from the sliding ring 101. After the snap ring 51 is separated from the sliding ring 101, the long limiting strip 105 and the short limiting strip 106 stop limiting the blade 102. The blade 102 is reset under the action of the torsion spring and rotates back into a straight state parallel to the water inlet pipe 2. Moreover, the top block 104 rotates and resets, and the convex column 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 action of the convex column 02, the blade 102 remains straight and motionless in the water, avoiding the swing of the blade 102 when the water flow passes through. And a protective cover 107 is arranged on the movable rod 5. The protective cover 107 can wrap the snap ring 51 and the sliding ring 101, which can prevent the aquatic plants or aquatic plant tissues in the water from entering and remaining between the snap ring 51 and the sliding ring 101, reduce the probability of the aquatic plants or aquatic plant tissues entering such areas with relatively narrow and complex spatial structures, reduce the difficulty of device maintenance, and is in the shape of a cone, and the conical surface is arranged along the water flow, which can minimize the aquatic plants or aquatic plant tissues being hooked and accumulated on its own surface and affecting the use.

[0043] In the actual use process, in order to briefly describe the filtration and water passing efficiency, generally, when the filter net 4 can intercept aquatic plants or tissues of aquatic plants, the largest possible mesh size is pursued to improve the water passing efficiency. Therefore, when aquatic plants or tissues of aquatic plants are intercepted by the filter net 4, some thin strip branches of the aquatic plants or tissues of aquatic plants are likely to pass through the filter net 4 to the other end. Under the action of the water flow, these thin strip branches will be entangled with each other. When the aquatic plants or tissues of aquatic plants are stirred up and pulled out for cleaning by the stirring rod 7 later, because their thin strip branches are entangled with each other on the other side of the filter net 4, it is more difficult to remove and clean the aquatic plants or tissues of aquatic plants through the stirring rod 7, and forcibly pulling them away is likely to damage the filter net 4 itself. Therefore, when an operator observes through the observation window 21 that thin strip branches appear on one side of the filter net 4, first, the operator pulls the movable rod 5 to move. The movable rod 5 drives the rotating roller 111 to move, so that the barbs 114 and the scraper 115 on the rotating roller 111 contact the surface of the filter net 4. At the same time, the bevel gear 112 and the bevel gear ring 113 are engaged, and at the same time, the snap ring 51 on the movable rod 5 close to the rotating roller 111 is driven to move and snap into the sliding ring 101 close to the rotating roller 111. Driven by the same principle as above, the movable rod 5 rotates in the same direction. The movable rod 5 drives the rotating roller 111 to revolve on the filter net 4 and sweep across the entire surface of the filter net 4. The movable bevel gear 112 is engaged and driven by the stationary bevel gear ring 113, so that the rotating roller 111 rotates while revolving. When the rotating roller 111 rotates, the barbs 114 on the rotating roller 111 lift the thin strip branches. As the rotating roller 111 continues to rotate, the thin strip branches are straightened. Then, as the scraper 115 rotates, the straightened thin strip branches are cut off, making it easier for the scraper 115 to cut off the thin strip branches. If there are no barbs 114, the thin strip branches are more likely to have poor cutting effect by the scraper 115 due to their small size, swinging with the water, and smooth surface, ensuring that the subsequent stirring rod 7 can remove the aquatic plants or tissues of aquatic plants accumulated on the surface of the filter net 4. If the cut thin strip branches are not entangled by the barbs 114, they can also be intercepted and collected by the collection net 116. And in terms of spatial position, the collection net 116 will also contact the barbs 114. Therefore, during the rotation of the rotating roller 111, it can also stir the aquatic plants or tissues of aquatic plants intercepted and collected on the surface of the collection net 116, making them re-entangle and converge on the barbs 114 for subsequent cleaning.

[0044] It should be noted that the movable rod 5 penetrates through the water inlet pipe 2 via the sealing sleeve 22, and a marking line is provided on the surface of the area of the movable rod 5 outside the sealing sleeve 22. During the process of pulling the movable rod 5, the connection between the movable rod 5 and the water inlet pipe 2 is sealed by the sealing sleeve 22 to avoid water leakage; moreover, when manually pulling the movable rod 5, the relative position between the marking line provided on the surface of the movable rod 5 and the end of the sealing sleeve 22 can be referred to and compared, so as to determine the pulling distance of the movable rod 5, ensuring that when the movable rod 5 is pulled, the corresponding snap ring 51 can be correctly engaged with the sliding ring 101.

[0045] 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 barbs 114 by hand; if the stirring rod 7 needs to be disassembled, the operator only needs to press the pressing rod 61, as Figure 5 and Figure 6 shown, when the pressing rod 61 moves downward, the plug 63 is ejected from the slot 601, so that the installation rod 6 is no longer restricted. Then, the operator can pull out the installation rod 6 from the jack 501 and take out the installation rod 6 and the stirring rod 7, so as to facilitate the cleaning of the aquatic plants or aquatic plant tissues wound on the stirring rod 7. By manually pressing the pressing rod 61, the rapid disassembly of the installation rod 6 and the stirring rod 7 can be completed. Compared with using bolts to screw and install, it makes this component easy to replace.

[0046] Embodiment 2

[0047] On the basis of Embodiment 1, as Figure 3 and Figure 9 shown, it further includes an elastic isolation cover 201; the elastic isolation cover 201 is fixedly connected to the movable rod 5, and the elastic isolation cover 201 is attached to the surface of the filter net 4.

[0048] On the basis of the above Embodiment 1, by pushing the movable rod 5 to move, the cleaning of the surface of the filter net 4 can be completed, ensuring the normal passage of water flow, and as Figure 8As shown, the mating state of the filter screen 4, spline shaft, and movable rod 5, the structure of the spline shaft, and the rotation structure of the outer 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 elaborated here. When pumping water, aquatic plants or aquatic plant tissues may come into contact with the spline shaft. After accumulation, it 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. The elastic isolation cover 201 surrounds the spline shaft of the movable rod 5 to prevent the suctioned aquatic plants or aquatic plant tissues from coming into contact and accumulating at the spline shaft along with the water flow, affecting the movement of the movable rod 5. Moreover, when the movable rod 5 moves, the movable rod 5 drives the elastic isolation cover 201 to move, and the elastic isolation cover 201 deforms, stretching or contracting, and is always connected to the surface of the filter screen 4, surrounding the spline shaft of the movable rod 5 to prevent aquatic plants or aquatic plant tissues in the water from coming into contact with the spline shaft and affecting the movement of the movable rod 5.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes can be made therein without departing from the principles and spirit of the present invention. The scope of the present invention 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); characterized in that: It further 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 inlet pipe (2) is provided with an observation window (21); the inlet pipe (2) is provided with a sealing sleeve (22) in a penetrating manner; a movable rod (5) is slidably penetrated in 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 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 inlet pipe (2), and a key groove is formed and a spline shaft is installed in the area where the rotating part of the movable rod (5) penetrates through the filter screen (4). The center of the filter screen (4) is in a vacant state, and a circular ring is installed at the vacant position. The rotating member outside the spline shaft is rotatably connected with the circular ring at the vacant position of the filter screen (4); the rotating part of the movable rod (5) is connected with a rotating unit for driving the rotating part of the movable rod (5) to rotate, and the rotating unit is located on the left side of the filter screen (4); a plurality of jacks (501) are formed in the rotating part of the movable rod (5); each jack (501) is connected with a mounting rod (6); each mounting rod (6) is detachably connected with a plurality of stirring rods (7), and the end of the stirring rod (7) away from the mounting rod (6) is provided with an elbow; the rotating part of the movable rod (5) is connected with a cutting component for cutting aquatic plants; The rotating unit includes a snap ring (51), a sliding ring (101), vanes (102), a convex post (02), a fixed ring (103), a top block (104), a long limiting strip (105) and a short limiting strip (106); a snap ring (51) with a notch is arranged on the surface of the rotating part of the movable rod (5), and the snap ring (51) is located at the side of the filter net (4); a fixed ring (103) is slidably connected to the water inlet pipe (2); several vanes (102) are rotatably connected to the inner ring surface of the fixed ring (103), and the ends of all the vanes (102) far away from the fixed ring (103) are rotatably connected with a sliding ring (101), and a torsion spring is connected between the two; several convex blocks protrude from the inner ring surface of the sliding ring (101) towards the center of the water inlet pipe (2), and the convex blocks are slidably connected to the rotating part of the movable rod (5); a channel is arranged on the snap ring (51) to avoid collision with the convex blocks; the end of the vane (102) close to the center of the water inlet pipe (2) does not contact the snap ring (51); a top block (104) is fixedly connected to the end of each vane (102) close to the center of the water inlet pipe (2); several convex posts (02) equal in number to the vanes (102) are fixedly connected to the inner side surface of the sliding ring (101), a receiving groove is arranged on the surface of each top block (104), and each convex post (02) is slidably connected to the receiving groove of the corresponding top block (104); several long limiting strips (105) equal in number to the vanes (102) are fixedly connected to the surface of the snap ring (51); several short limiting strips (106) equal in number to the vanes (102) are fixedly connected to the surface of the snap ring (51); a long limiting strip (105) and a short limiting strip (106) form a group to jointly drive the vane (102) to rotate.

2. The centrifugal pump with multiple seals according to claim 1, wherein: It further includes a pressing rod (61), a spring (62) and an inserting block (63); each mounting rod (6) is slidably connected through a pressing rod (61); several symmetrically distributed springs (62) are fixedly connected in each jack (501); all the springs (62) on the same side in the jack (501) are jointly fixedly connected with an inserting block (63); two slots (601) for accommodating the inserting block (63) and forming a locking fit with the inserting block (63) are arranged on the lower side of each mounting rod (6); wedge-shaped surfaces capable of forming a wedge fit with each other are arranged on the pressing rod (61) and the inserting block (63).

3. The centrifugal pump with multiple seals according to claim 1, characterized in that: It further includes a protective cover (107); a 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) contacts the sliding ring (101).

4. The centrifugal pump with multiple seals according to claim 3, characterized in that: The protective cover (107) is arranged in a conical shape.

5. A centrifugal pump with multiple seals according to claim 1, characterized in that: The distance between the long limiting strip (105) and the short limiting strip (106) responsible for regulating the same vane (102) is equal to the width of the top block (104).

6. A centrifugal pump with multiple seals according to claim 1, characterized in that: The cutting component includes a rotating roller (111), bevel gears (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); a bevel gear (112) is fixedly connected to the end of the rotating roller (111) away from the movable rod (5); a bevel gear ring (113) is arranged on the side of the filter screen (4) facing away from the stirring rod (7), and the bevel gear ring (113) corresponds to the bevel gear (112); a plurality of scrapers (115) are fixedly connected to the surface of the rotating roller (111).

7. The centrifugal pump with multiple seals according to claim 6, characterized in that: It further includes barbs (114); a plurality of barbs (114) are arranged on the surface of the rotating roller (111).

8. A centrifugal pump with multiple seals according to any one of claims 6-7, characterized in that: It further includes a collection net (116); the collection net (116) is fixedly connected to the movable part of the movable rod (5), the rotating roller (111) is located between the filter screen (4) and the collection net (116), and the collection net (116) is in contact with the barbs (114).

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

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