A large-sized tubular pump that is easy to maintain

Abstract

The present application discloses a large-scale tubular pump that is convenient for maintenance, including a fixed housing, a lifting housing, a pump housing, two filtering units, and two end housings. A bulb housing and a plurality of guide vanes are installed in the pump housing. A motor unit is installed in the bulb housing. The motor unit is connected to a rotating shaft that extends out of the bulb housing, and an impeller is installed at the rotating shaft. The pump housing is located between the two end housings, and an insertion space is formed between the pump housing and each of the two end housings. The filtering unit can be inserted into the insertion space. The pump housing and the two end housings are both fixedly connected to the fixed housing, and the lifting housing can shield the pump housing, the two filtering units, and the two end housings. For the tubular pump of the present application, the filtering unit can intercept sundries and waterweeds in the water body, especially long and thin strip-shaped waterweeds, so as to prevent the long and thin strip-shaped waterweeds from winding around the impeller. By rotating the lifting plate 180 degrees, the positions of the two filtering units can be swapped with each other, so that the waterweeds embedded in the mesh holes can be washed away by the water flow.

Description

Technical Field

[0001] The present invention relates to the technical field of tubular pumps, and more specifically, to a large-sized tubular pump that is convenient for maintenance. Background Art

[0002] Due to its good hydraulic performance, the tubular pump is suitable for low-lift pumping stations. The tubular pump adopts a horizontal-axis structure, and the water flow passes through it and flows along a short and straight tubular flow channel, which can reduce the influence of turning. The water flow pattern is smooth, and the hydraulic loss of the flow channel is small. It is not only used in municipal drainage and water supply, but also has been well applied in the east route project of the South-to-North Water Diversion Project.

[0003] For the tubular pumps in the prior art, after being used underwater for a period of time, sundries and waterweeds in the water body will adsorb and entangle on the guide vanes and impellers, which are difficult to remove and will cause corrosion to them, resulting in low working efficiency of the tubular pump and affecting the normal operation of the tubular pump. In particular, some slender waterweeds are very easy to entangle on the impeller. In the long run, a large amount of moss will be generated inside the pump body of the tubular pump, which is not convenient for later maintenance of the tubular pump, increases the maintenance cost and the difficulty of cleaning. Moreover, after some hard sundries impact the guide vanes and impellers, they will cause a certain degree of damage to them, affecting the service life of the tubular pump. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provides a large-sized tubular pump that is convenient for maintenance.

[0005] To achieve the above object, the present invention provides the following technical solution: A tubular pump includes a fixed housing, a lifting housing, a pump housing, two filtering units, and two end housings. A lamp housing and a plurality of guide vanes are installed in the pump housing. A motor unit is installed in the lamp housing. The motor unit is connected to a rotating shaft that extends out of the lamp housing, and an impeller is installed at the rotating shaft. The pump housing is located between the two end housings, and an insertion space is formed between the pump housing and each of the two end housings. The filtering unit can be inserted into the insertion space. The pump housing and the two end housings are both fixedly connected to the fixed housing, and the lifting housing can cover the pump housing, the two filtering units, and the two end housings.

[0006] Furthermore, it further includes a first sealing unit; the fixed housing includes two end plates, a lower arc panel connected between the two end plates, two lower side convex plates connected between the two end plates, and two side baffles connected between the two end plates. The two lower side convex plates and the two side baffles correspond one by one, and the corresponding side baffle is fixedly connected to the lower side convex plate. There are circular through holes at the end plates; the lifting housing includes two upper side convex plates and an upper arc panel connected between the two upper side convex plates. A second sealing unit is installed at the lifting housing. The second sealing unit includes two arc-shaped sealing blocks and two U-shaped sealing blocks. The two arc-shaped sealing blocks are fixed at both ends of the upper arc panel, and the two U-shaped sealing blocks are respectively fixed at the two upper side convex plates. The two U-shaped sealing blocks respectively abut against the two side baffles, and the two arc-shaped sealing blocks respectively abut against the two end plates; the pump housing and the two end housings are both fixedly connected to the lower arc panel. The first sealing unit includes two strip-shaped sealing gaskets and two arc-shaped sealing gaskets. The two strip-shaped sealing gaskets are respectively fixed at the two lower side convex plates, and the two arc-shaped sealing gaskets are respectively fixed at the two end housings; the fixed housing is connected to a top frame through a support rod, and the top frame and the lifting housing are connected through a hydraulic telescopic rod.

[0007] Thus, the fixed housing and the lifting housing can surround the pump housing and the two end housings, and good sealing is achieved through the first sealing unit and the second sealing unit. The lifting of the lifting housing can be realized through the hydraulic telescopic rod.

[0008] Furthermore, the end plate includes a rectangular plate and a semi-circular plate fixed below the rectangular plate.

[0009] Furthermore, the end housing includes a fixed pipe and a movable pipe. The fixed pipe and the movable pipe are connected through an annular flexible connection part. There are a plurality of limit jacks at the fixed pipe, and a plurality of limit insertion rods matching the limit jacks are provided at the movable pipe. A first spring located between the fixed pipe and the movable pipe is sleeved on the limit insertion rod. The fixed pipe is fixedly connected to the lower arc panel, and the movable pipe can displace relative to the lower arc panel. The arc-shaped sealing gasket is fixedly connected to the fixed pipe. An insertion space is formed between each movable pipe and the pump housing.

[0010] The fixed pipe and the movable pipe are connected through an annular flexible connection part, so that when the filtering unit is inserted into the insertion space, the movable pipe can displace relative to the lower arc panel. Through the elastic action of the first spring, the filtering unit can be fixed between the movable pipe and the pump housing.

[0011] Furthermore, a rotary drive unit is installed at the top frame. The rotary drive unit is connected to a rotating sleeve. A rotating rod is inserted into the rotating sleeve. The rotating sleeve has a strip-shaped limiting groove, and the rotating rod has a strip-shaped limiting rib that cooperates with the strip-shaped limiting groove. The upper arc-shaped panel has a through hole through which the rotating rod passes. A linear bearing is installed at the through hole. A limiting plate is also fixed to the rotating rod above the linear bearing. A lifting plate is fixed to the bottom end of the rotating rod. The filtering unit includes an insertion ring, a net part installed on the insertion ring, a connecting block fixedly connected to the insertion ring, and a horizontal insertion rod fixedly connected to the connecting block. Both ends of the lifting plate have insertion channels that cooperate with the horizontal insertion rods. A second spring is sleeved on each horizontal insertion rod between the connecting block and the lifting plate. The lower surface of the upper arc-shaped panel has a strip-shaped accommodating groove that can accommodate the lifting plate and the two connecting blocks. The strip-shaped accommodating groove has an annular gasket that surrounds the through hole; the cross-flow pump can be in a first state and a second state. In the first state, both insertion rings are respectively inserted into an insertion space, and one side of each insertion ring is abutted by the movable pipe, and the other side is abutted by the pump housing. The upper arc-shaped panel abuts the two arc-shaped gaskets, and the two upper side convex plates respectively abut the two strip-shaped gaskets. The lifting plate and the two connecting blocks are both located in the strip-shaped accommodating groove, and the upper surface of the lifting plate abuts the annular gasket. The hydraulic telescopic rod is in a first length; in the second state, the hydraulic telescopic rod is in a second length, and neither of the two filtering units is inserted into the insertion space. The lifting plate and the two connecting blocks are not accommodated in the strip-shaped accommodating groove. The limiting plate abuts the linear bearing. The first length is greater than the second length.

[0012] When the hydraulic telescopic rod drives the lifting housing to rise, it can drive the rotating rod to be inserted into the rotating sleeve, thereby driving the lifting plate to rise, and driving the lifting plate to rotate by driving the rotating rod through the rotary drive unit.

[0013] Furthermore, when the cross-flow pump is in the second state, the rotary drive unit can drive the lifting plate to rotate 180 degrees. During the rotation, due to the limitation of the two side baffles, the two insertion rings will approach each other.

[0014] Furthermore, the insertion ring includes a ring body and two sealing rings fixed to both sides of the ring body. The top end of the ring body is wider than the bottom end of the ring body; when the cross-flow pump is in the first state, one of the two sealing rings of each insertion ring abuts the movable pipe, and the other abuts the pump housing.

[0015] Thus, the sealing performance between the filtering unit and the movable pipe and between the filtering unit and the pump housing can be enhanced through the sealing rings.

[0016] Further, the lifting plate is an arc-shaped plate; the horizontal insertion rod is cylindrical, and more than 4 horizontal insertion rods are fixedly connected to the connection block of each filtering unit. The axes of all the horizontal insertion rods at the connection block of the same filtering unit are located at the same horizontal height. The two filtering units are respectively a first filtering unit and a second filtering unit. The axis of the horizontal insertion rod of the first filtering unit is higher than the axis of the horizontal insertion rod of the second filtering unit.

[0017] Thus, the insertion channels corresponding to the first and second filtering units are actually at different heights, so the insertion channels corresponding to the first and second filtering units are actually staggeredly distributed. Thus, the lifting plate can provide a longer length for the insertion channels, so that the two filtering units can obtain a larger moving space to approach each other. Limited by the two side baffles, the two filtering units can be closer to each other by a greater distance.

[0018] Further, the number of the support rods is greater than or equal to 4, and the bottom end of each support rod is fixedly connected to an end plate; there are 4 hydraulic telescopic rods, and two of the hydraulic telescopic rods are fixed to each upper convex plate.

[0019] Thus, the top frame is stably supported by 4 support rods, and the stability of the lifting housing during the lifting process can be improved by the telescopic action of 4 hydraulic telescopic rods.

[0020] Further, the first sealing unit is made of rubber material, and two strip-shaped sealing gaskets and two arc-shaped sealing gaskets are integrally formed; the second sealing unit is made of rubber material, and two U-shaped sealing blocks and two arc-shaped sealing blocks are integrally formed.

[0021] Thus, the sealing effect of the first sealing unit and the second sealing unit is good.

[0022] Further, there are more than 8 limiting jacks at each fixed pipe, and the multiple limiting jacks at each fixed pipe are distributed at equal intervals in a ring shape.

[0023] Thus, a good limiting effect is exerted on the movable pipe.

[0024] Further, there are 3 strip-shaped limiting grooves at the rotating sleeve, and the 3 strip-shaped limiting grooves are distributed at equal intervals in a ring shape. There are 3 strip-shaped limiting ribs at the rotating rod, and the 3 strip-shaped limiting ribs are distributed at equal intervals in a ring shape.

[0025] Thus, the rotating rod can keep stable ascending and descending.

[0026] Further, the width of the top end of the insertion space is wider than the width of the bottom end of the insertion space, and the width direction is the same as the axis direction of the rotating shaft.

[0027] Thus, the insertion space matches the shape of the ring body of the inserted ring, and good plugging and detachment can be achieved.

[0028] Further, a bearing is installed between the lamp housing and the rotating shaft.

[0029] Further, the lamp housing is connected to the pump housing through a plurality of radial rods.

[0030] Further, the rotary drive unit is a rotary motor, a rotary cylinder or a rotary hydraulic cylinder.

[0031] Further, two gate units are further included.

[0032] In some embodiments, the two gate units are respectively fixedly connected to the two end plates.

[0033] In some embodiments, the two end plates are fixedly connected to the concrete foundation member, the two gate units are also connected to the concrete foundation member, and the two end plates are located between the two gate units.

[0034] Further, the gate unit is a gate valve.

[0035] Further, the annular flexible connection portion includes two annular rubber portions and a connecting rubber portion connected between the two annular rubber portions. The connecting rubber portion is annular and protrudes outward.

[0036] Further, the connecting rubber portion and the two annular rubber portions of the annular flexible connection portion are integrally formed.

[0037] Thus, the annular flexible connection portion not only realizes sealed connection, but also has a certain flexibility. And in the first state, due to the limitation of the upper arc panel and the lower arc panel, the water pressure borne by the two annular flexible connection portions can be effectively borne.

[0038] Beneficial effects:

[0039] 1. For the tubular pump of the present application, the filtering unit can block sundries and waterweeds in the water body, especially long and thin strip-shaped waterweeds, thereby avoiding the entanglement of long and thin strip-shaped waterweeds on the impeller, which can not only ensure the normal operation of the tubular pump, but also reduce the maintenance work of the tubular pump.

[0040] 2. By raising the lifting housing and the lifting plate, rotating the lifting plate by 180 degrees, and then lowering the lifting housing, the positions of the two filtering units can be swapped with each other, so that the net part of the filtering unit can be backflushed by water flow, and then the waterweeds embedded in the mesh holes can be washed away.

[0041] 3. The sealing performance between the fixed housing and the lifting housing can be enhanced through the first sealing unit and the second sealing unit. Description of the drawings

[0042] Figure 1 It is a schematic diagram of the first state of a tubular pump;

[0043] Figure 2 It is a schematic diagram of the first perspective of the second state of a tubular pump;

[0044] Figure 2A It is an enlarged view of area A;

[0045] Figure 3 It is a schematic diagram of the second perspective of the second state of a tubular pump;

[0046] Figure 4 It is a schematic diagram of the third perspective of the second state of a tubular pump;

[0047] Figure 5 It is a schematic diagram of the first process of a rotary lifting plate;

[0048] Figure 5A It is an enlarged view of area B;

[0049] Figure 6 It is a schematic diagram of the second process of a rotary lifting plate;

[0050] Figure 7 It is a schematic diagram of the third process of a rotary lifting plate;

[0051] Figure 8 It is a schematic diagram of the fourth process of a rotary lifting plate.

[0052] (For the sake of clarity of the schematic diagram, part of one side baffle is hidden; two side walls are hidden)

[0053] Explanation of reference numerals:

[0054] 1.1 End plate; 1.2 Lower arc panel; 1.3 Lower side convex plate; 1.4 Side baffle; 1.5 Support rod;

[0055] 2.1 Upper side convex plate; 2.2 Upper arc panel; 2.2.1 Linear bearing; 2.2.2 Strip-shaped accommodating groove; 2.2.3 Annular gasket;

[0056] 3 Pump casing;

[0057] 4 Filter unit; 4.1 Inserted ring; 4.2 Mesh part; 4.3 Connecting block; 4.4 Second spring;

[0058] 5 End shell; 5.1 Fixed pipe; 5.2 Movable pipe; 5.3 Annular flexible connection part; 5.3.1 Annular rubber part; 5.3.2 Connecting rubber part; 5.4 First spring;

[0059] 6.1 Strip-shaped gasket; 6.2 Arc-shaped gasket;

[0060] 7.1 Arc-shaped sealing block; 7.2 U-shaped sealing block;

[0061] 8 Top frame; 8.1 Hydraulic telescopic rod; 8.2 Rotating sleeve; 8.3 Rotating rod; 8.3.1 Limit plate; 8.4 Lifting plate;

[0062] 9.1 Bottom wall; 9.2 End wall; 9.3 Gate unit; 9.4 Ladder. Detailed implementation manners

[0063] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0064] The present invention provides a large-scale tubular pump that is convenient for maintenance as Figures 1-8 shown, including a fixed housing, a lifting housing, a pump housing 3, two filter units 4, and two end housings 5. A bulb housing and a plurality of guide vanes are installed in the pump housing 3. A motor unit is installed in the bulb housing. The motor unit is connected to a rotating shaft extending out of the bulb housing, and an impeller is installed at the rotating shaft. The pump housing 3 is located between the two end housings 5. Insertion spaces are formed between the pump housing 3 and the two end housings 5. The filter unit 4 can be inserted into the insertion space. The pump housing 3 and the two end housings 5 are both fixedly connected to the fixed housing, and the lifting housing can cover the pump housing 3, the two filter units 4, and the two end housings 5.

[0065] The tubular pump further includes a first sealing unit; the fixed housing includes two end plates 1.1, a lower arc panel 1.2 connected between the two end plates 1.1, two lower side convex plates 1.3 connected between the two end plates 1.1, and two side baffles 1.4 connected between the two end plates 1.1. The two lower side convex plates 1.3 and the two side baffles 1.4 correspond to each other one by one, and the corresponding side baffle 1.4 is fixedly connected to the lower side convex plate 1.3. The end plate 1.1 has a circular through hole; the lifting housing includes two upper side convex plates 2.1 and an upper arc panel 2.2 connected between the two upper side convex plates 2.1. A second sealing unit is installed on the lifting housing. The second sealing unit includes two arc-shaped sealing blocks 7.1 and two U-shaped sealing blocks 7.2. The two arc-shaped sealing blocks 7.1 are fixed at both ends of the upper arc panel 2.2, the two U-shaped sealing blocks 7.2 are respectively fixed at the two upper side convex plates 2.1, the two U-shaped sealing blocks 7.2 respectively abut against the two side baffles 1.4, and the two arc-shaped sealing blocks 7.1 respectively abut against the two end plates 1.1; the pump housing 3 and the two end housings 5 are both fixedly connected to the lower arc panel 1.2. The first sealing unit includes two strip-shaped sealing gaskets 6.1 and two arc-shaped sealing gaskets 6.2. The two strip-shaped sealing gaskets 6.1 are respectively fixed at the two lower side convex plates 1.3, and the two arc-shaped sealing gaskets 6.2 are respectively fixed at the two end housings 5; the fixed housing is connected to a top frame 8 through a support rod 1.5, and the top frame 8 and the lifting housing are connected through a hydraulic telescopic rod 8.1; the end housing 5 includes a fixed pipe 5.1 and a movable pipe 5.2. The fixed pipe 5.1 and the movable pipe 5.2 are connected through an annular flexible connection part 5.3. The fixed pipe 5.1 has a plurality of limit jacks, the movable pipe 5.2 has a plurality of limit insertion rods that cooperate with the limit jacks, and a first spring 5.4 located between the fixed pipe 5.1 and the movable pipe 5.2 is sleeved on the limit insertion rod. The fixed pipe 5.1 is fixedly connected to the lower arc panel 1.2, the movable pipe 5.2 can displace relative to the lower arc panel 1.2, the arc-shaped sealing gasket 6.2 is fixedly connected to the fixed pipe 5.1, and an insertion space is formed between each movable pipe 5.2 and the pump housing 3.

[0066] A rotary drive unit is installed at the top bracket 8. The rotary drive unit is connected to a rotating sleeve 8.2. A rotating rod 8.3 is inserted into the rotating sleeve 8.2. The rotating sleeve 8.2 has a strip-shaped limiting groove, and the rotating rod 8.3 has a strip-shaped limiting rib that cooperates with the strip-shaped limiting groove. The upper arc panel 2.2 has a perforation through which the rotating rod 8.3 passes. A linear bearing 2.2.1 is installed at the perforation. A limiting plate 8.3.1 is also fixed to the rotating rod 8.3 above the linear bearing 2.2.1. A lifting plate 8.4 is fixed to the bottom end of the rotating rod 8.3. The filtering unit 4 includes an insertion ring 4.1, a net part 4.2 installed on the insertion ring 4.1, a connecting block 4.3 fixedly connected to the insertion ring 4.1, and a horizontal insertion rod fixedly connected to the connecting block 4.3. Insertion channels that cooperate with the horizontal insertion rods are provided at both ends of the lifting plate 8.4. A second spring 4.4 is sleeved on each horizontal insertion rod between the connecting block 4.3 and the lifting plate 8.4. A strip-shaped accommodating groove 2.2.2 capable of accommodating the lifting plate 8.4 and two connecting blocks 4.3 is provided on the lower surface of the upper arc panel 2.2. An annular gasket 2.2.3 surrounding the perforation is provided at the strip-shaped accommodating groove 2.2.2; the through-flow pump can be in a first state and a second state. In the first state, both insertion rings 4.1 are respectively inserted into an insertion space, and one side of each insertion ring 4.1 is abutted by the movable pipe 5.2, and the other side is abutted by the pump housing 3. The upper arc panel 2.2 abuts two arc-shaped gaskets 6.2, and two upper side convex plates 2.1 respectively abut two strip-shaped gaskets 6.1. The lifting plate 8.4 and two connecting blocks 4.3 are both located in the strip-shaped accommodating groove 2.2.2, and the upper surface of the lifting plate 8.4 abuts the annular gasket 2.2.3. The hydraulic expansion link 8.1 is in a first length; in the second state, the hydraulic expansion link 8.1 is in a second length, and both filtering units 4 are not inserted into the insertion space. The lifting plate 8.4 and two connecting blocks 4.3 are not accommodated in the strip-shaped accommodating groove 2.2.2. The limiting plate 8.3.1 abuts the linear bearing 2.2.1. The first length is greater than the second length.

[0067] When the through-flow pump is in the second state, the drive unit can drive the lifting plate 8.4 to rotate 180 degrees. During the rotation, due to the limitation of the two side baffles 1.4, the two insertion rings 4.1 will approach each other; the insertion ring 4.1 includes a ring body and two sealing rings fixed to both sides of the ring body. The top end of the ring body is wider than the bottom end of the ring body; when the through-flow pump is in the first state, one of the two sealing rings of each insertion ring 4.1 abuts the movable pipe 5.2, and the other abuts the pump housing 3.

[0068] The lifting plate 8.4 is an arc-shaped plate; the horizontal insertion rod is cylindrical, and there are more than 4 horizontal insertion rods fixedly connected to the connection block 4.3 of each filtering unit 4. The axes of all the horizontal insertion rods at the connection block 4.3 of the same filtering unit are located at the same horizontal height. The two filtering units 4 are respectively a first filtering unit and a second filtering unit, and the axis of the horizontal insertion rod of the first filtering unit is higher than the axis of the horizontal insertion rod of the second filtering unit; the number of the support rods 1.5 is greater than or equal to 4, and the bottom end of each support rod 1.5 is fixedly connected to an end plate 1.1; there are 4 hydraulic telescopic rods 8.1, and two of the hydraulic telescopic rods 8.1 are fixed to each upper convex plate 2.1; the first sealing unit is made of rubber material, and two strip-shaped sealing gaskets 6.1 and two arc-shaped sealing gaskets 6.2 are integrally formed; the second sealing unit is made of rubber material, and two U-shaped sealing blocks 7.2 and two arc-shaped sealing blocks 7.1 are integrally formed; each fixed pipe 5.1 has more than 8 limit jacks, and the multiple limit jacks at each fixed pipe 5.1 are annularly and equally spaced.

[0069] As shown in the figure, the tubular pump of the present application is installed in a concrete base member. The concrete base member includes a bottom wall, two end walls and two side walls (for the sake of clear illustration, the two side walls are not drawn). There are water inlet and outlet through holes at both end walls. The two end plates of the tubular pump are respectively installed at the two end walls, and the two gate units are respectively installed on the outer sides of the two end walls. For the convenience of maintenance, a ladder is also installed at at least one side wall. A water pump is also installed in the concrete base member, which can be used to pump out the accumulated water therein.

[0070] For the tubular pump of the present application, the filtering unit can block sundries and waterweeds in the water body, especially long and thin strip-shaped waterweeds, so as to avoid the long and thin strip-shaped waterweeds from winding around the impeller. This can not only ensure the normal operation of the tubular pump, but also reduce the maintenance work of the tubular pump. Due to the long-term water flow scouring, the waterweeds will be embedded in the mesh holes. The lifting housing can be lifted by the hydraulic telescopic rod to drive the lifting plate to rise (at this time, because the waterweeds are embedded in the mesh holes and are not easy to fall off and enter the pump housing), and then the lifting plate is driven to rotate 180 degrees by the rotation driving unit, and then the lifting housing is lowered, so that the two filtering units are interchanged in position, so that the water flow can backwash the mesh part of the filtering unit, and the waterweeds can flow downstream along the water flow. In order to enable the tubular pump to be used for a long time, the two filtering units can be regularly interchanged.

[0071] Specifically, first start the hydraulic telescopic rod to drive the lifting housing to rise, so that the limiting plate abuts against the linear bearing. As the lifting housing continues to rise, the rotating rod rises and drives the lifting plate to rise, so that both filtering units disengage from the insertion space. And due to the gravity factor, the lifting plate and the two connecting blocks both disengage from the strip-shaped accommodating groove. Then start the rotation driving unit to drive the rotating rod to drive the lifting plate to rotate. During the rotation, due to the limitation of the two side baffles, the horizontal insertion rod moves, so that the two insertion rings will approach each other. After passing through the side baffles, due to the action of the second spring, the two insertion rings will move away from each other. When the lifting plate rotates 180 degrees, the positions of the two filtering units are swapped. Then start the hydraulic telescopic rod to drive the lifting housing to descend to the fixed housing. The descent of the lifting housing drives the lifting plate to descend, so that the two insertion rings are respectively inserted into an insertion space. Since the movable pipe and the fixed pipe are connected by an annular flexible connecting portion, one side of each insertion ring is abutted by the movable pipe, and the other side is abutted by the pump housing. Furthermore, a good seal is achieved between the filtering unit and the pump housing and the movable pipe. At the same time, the lifting plate and the two connecting blocks are both located in the strip-shaped accommodating groove, and the upper surface of the lifting plate abuts against the annular gasket. Together with the first sealing unit and the second sealing unit, a good sealing performance is achieved.

[0072] Although the present invention has been illustrated and described with respect to the preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention as long as they do not exceed the scope defined by the claims of the present invention.

Claims

1. A large-sized tubular turbine pump that is easy to maintain, characterized in that, Comprising a fixed housing, a first sealing unit, a lifting housing equipped with a second sealing unit, a pump housing equipped with a lamp housing and a plurality of guide vanes, two filtering units, and two end housings comprising a fixed pipe and a movable pipe; a motor unit for driving a rotating shaft with an impeller is installed inside the lamp housing; the fixed housing includes two end plates with circular through-holes, a lower arc-shaped panel, two lower side convex plates, and two side baffles; the lifting housing includes two upper side convex plates and an upper arc-shaped panel with a perforation installed with a linear bearing, and the second sealing unit includes two arc-shaped sealing blocks and two U-shaped sealing blocks; the first sealing unit includes two strip-shaped sealing gaskets and two arc-shaped sealing gaskets; the fixed housing is connected by a support rod to a top frame equipped with a rotary drive unit that is connected to the lifting housing by a hydraulic telescopic rod; the fixed pipe and the movable pipe are connected by an annular flexible connection part, the fixed pipe has a plurality of limit jacks, the movable pipe has a plurality of limit insertion rods sleeved with first springs, and an insertion space is formed between the movable pipe and the pump housing; the rotary drive unit is connected to a rotating sleeve with a strip-shaped limit groove and inserted with a rotating rod, the rotating rod has a strip-shaped limit rib, a limit plate is fixed, and a lifting plate with insertion channels at both ends; the filtering unit includes a mesh part, a connecting block, an insertion ring including a circular ring body and two sealing rings, and a horizontal insertion rod sleeved with a second spring; the tubular pump can be in a first state and a second state. In the first state, each insertion ring is inserted into an insertion space, one side is abutted by the movable pipe, the other side is abutted by the pump housing, and the hydraulic telescopic rod is at a first length; in the second state, the hydraulic telescopic rod is at a second length less than the first length, the two filtering units are not inserted into the insertion space, the drive unit can drive the lifting plate to rotate 180 degrees, and during the process, due to the limitation of the two side baffles, the two insertion rings approach each other.

2. The large-scale easy-to-maintain tubular pump according to claim 1, characterized in that, The lower arc-shaped panel is fixedly connected to the fixed pipe; the arc-shaped sealing blocks are fixed at both ends of the upper arc-shaped panel; the U-shaped sealing blocks are fixed at the two upper side convex plates; the strip-shaped sealing gaskets are fixed at the two lower side convex plates; the arc-shaped sealing gaskets are fixed at the two fixed pipes; the pump housing and the two end housings are both fixedly connected to the fixed housing, and the lifting housing can shield the pump housing, the two filtering units, and the two end housings; the two U-shaped sealing blocks respectively abut the two side baffles, and the two arc-shaped sealing blocks respectively abut the two end plates; the lower surface of the upper arc-shaped panel has a strip-shaped accommodation groove capable of accommodating the lifting plate and the two connecting blocks, and an annular sealing gasket surrounding the perforation is provided at the strip-shaped accommodation groove; in the first state, the upper arc-shaped panel abuts the two arc-shaped sealing gaskets, the two upper side convex plates respectively abut the two strip-shaped sealing gaskets, the lifting plate and the two connecting blocks are both located in the strip-shaped accommodation groove, and the upper surface of the lifting plate abuts the annular sealing gasket; in the second state, the lifting plate and the two connecting blocks are not accommodated in the strip-shaped accommodation groove, and the limit plate abuts the linear bearing.

3. The large-scale easy-to-maintain tubular pump according to claim 1, characterized in that, The top end of the ring body is wider than the bottom end of the ring body; when the through-flow pump is in the first state, one of the two sealing rings inserted into the ring abuts against the movable pipe, and the other abuts against the pump housing.

4. The large-scale easy-to-maintain tubular pump according to claim 1, characterized in that, The lifting plate is an arc-shaped plate; the horizontal insertion rod is cylindrical, and more than 4 horizontal insertion rods are fixedly connected to the connection block of each filtering unit. The axes of all the horizontal insertion rods at the connection block of the same filtering unit are at the same horizontal height. The two filtering units are the first filtering unit and the second filtering unit respectively. The axis of the horizontal insertion rod of the first filtering unit is higher than the axis of the horizontal insertion rod of the second filtering unit.

5. The large-sized circulation pump that is easy to maintain according to claim 1, wherein The number of the support rods is greater than or equal to 4, and the bottom end of each support rod is fixedly connected to an end plate; there are 4 hydraulic telescopic rods, and two of the hydraulic telescopic rods are fixed at each upper convex plate.

6. The large-scale easy-to-maintain tubular pump according to claim 1, characterized in that, The first sealing unit is made of rubber material, and two strip-shaped sealing gaskets and two arc-shaped sealing gaskets are integrally formed; the second sealing unit is made of rubber material, and two U-shaped sealing blocks and two arc-shaped sealing blocks are integrally formed.

7. The large-scale easy-to-maintain tubular pump according to claim 1, characterized in that, There are more than 8 limit jacks at each fixed pipe, and the multiple limit jacks at each fixed pipe are annularly and equally spaced.

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