A large water pump capable of realizing integral lifting and disassembly and a construction method thereof

Abstract

The invention discloses a large-scale water pump capable of being hoisted and disassembled as a whole and a construction method thereof, which belongs to the technical field of large-scale water pump construction. The main steps are as follows: removing a main shaft seal matched with a main shaft, and hoisting out the main shaft seal; fastening a top cover support member to an upper ring plate of the top cover by bolts, and leaving a gap between the top cover support member and a main shaft clamping ring; sequentially removing an upper ring plate of a seat ring and a cylindrical valve support ring, and installing a lifting lug on the upper ring plate of the top cover; suspending on the lifting lug by a steel wire rope and a hook of a hoisting machine, and performing a hoisting action; after the top cover support member supports the main shaft clamping ring, removing the connecting bolts between the main shaft and the motor shaft; continuing the hoisting action by the hoisting machine, the water pump unit is hoisted as a whole, which greatly reduces the maintenance period of the unit, improves the efficiency of the maintenance work, and also provides a strong guarantee for the safe and reliable operation of the water pump unit.

Description

Technical Field

[0001] The invention belongs to the technical field of large water pump construction, and in particular relates to a large water pump capable of realizing integral lifting and disassembly and a construction method thereof. Background Art

[0002] At present, when a large water pump needs to overhaul the runner, due to the structural design of the unit, it is generally necessary to first dismantle the top cover, water guide bearing and other components and lift them out of the pit before the runner can be lifted out of the pit for overhaul. The above scheme requires the removal of each component such as the unit top cover, water guide bearing, main shaft, etc., which takes a long time to complete, the disassembly procedure is complicated, the bolts are easily damaged during engagement and disassembly, and the reinstallation procedure is also relatively complicated, which is not conducive to the rapid and reliable overhaul of large water pump units. Therefore, it is urgent to design a large water pump structure that can realize overall lifting and disassembly to solve the above problems.

[0003] In order to solve the problem of how to realize the start and shutdown of a large energy storage pump without movable guide vanes (including phase adjustment water pressure start, normal shutdown and emergency shutdown of the water pump power failure, etc.), it is necessary to reasonably summarize the overall structural scheme of the large energy storage pump unit. The main disadvantages of the existing technical scheme are:

[0004] (1) During the overhaul of the unit, each component of the unit needs to be dismantled one by one, which takes a long time;

[0005] (2) The disassembly procedure is complicated, the bolts are easily damaged during assembly and disassembly, and the reassembly procedure is also relatively complicated, which is not conducive to the rapid and reliable maintenance of large water pump units;

[0006] (3) It requires a large investment of manpower, material resources, and time, and the disassembly and assembly personnel must receive special and systematic training. The overall cost of the pump station's maintenance work on the pump unit is relatively high.

[0007] From the above analysis, it can be seen that other existing solutions have certain shortcomings, and it is urgent to propose new solutions to solve the above problems. Summary of the invention

[0008] In view of this, in order to solve the above-mentioned problems existing in the prior art, the object of the present invention is to provide a large water pump which can be hoisted and disassembled as a whole and a construction method thereof.

[0009] The technical solution adopted by the present invention is: a large water pump that can be lifted and disassembled as a whole, including a main shaft and a top cover, the end of the main shaft is equipped with a runner and the runner is equipped with a runner chamber, the main shaft is provided with a main shaft clamping ring, and the main shaft is sleeved with a top cover support; the top cover includes a top cover upper ring plate and a top cover lower ring plate, the top cover support is located between the main shaft clamping ring and the top cover upper ring plate, and the top cover support is connected to the top cover upper ring plate by bolts; it also includes a cylindrical valve support ring, the two ends of the cylindrical valve support ring are respectively connected to the top cover upper ring plate and the top cover lower ring plate by bolts, and the cylindrical valve support ring is equipped with a cylindrical valve kit.

[0010] Furthermore, it also includes an upper ring plate of the seat ring and a lower ring plate of the seat ring, the upper ring plate of the seat ring is connected to the seat ring vertical ring, the other end of the seat ring vertical ring is connected to the cylindrical valve support ring by bolts; a water inlet channel is formed between the upper ring plate of the seat ring and the lower ring plate of the seat ring, and the water inlet channel is connected to the impeller chamber.

[0011] Furthermore, the cylindrical valve kit includes a cylindrical valve body and a cylindrical valve servomotor driving the cylindrical valve body to perform lifting motion, the cylindrical valve servomotor is assembled on the cylindrical valve support ring, and the lifting motion of the cylindrical valve body seals or opens the water inlet channel.

[0012] Furthermore, a valve body assembly hole is formed between the seat ring upper ring plate and the top cover lower ring plate, the valve body assembly hole is movably assembled with the cylindrical valve body, and the valve body assembly hole and the seat ring lower ring plate are both provided with sealing gaskets corresponding to the cylindrical valve body.

[0013] Furthermore, a lifting lug is installed on the upper ring plate of the top cover.

[0014] Furthermore, the top cover support member includes a plurality of support member monomers, each support member monomer is combined with each other to form a conical shell shape, and the end of each support member monomer is connected to the top cover upper ring plate through bolts.

[0015] Furthermore, the spindle retaining ring is formed on the spindle by integral forging.

[0016] The present invention also provides a construction method for a large water pump capable of realizing overall lifting and disassembly, the construction method comprising the following steps:

[0017] (1) Remove the spindle seal that matches the spindle and lift out the spindle seal;

[0018] (2) Fasten the top cover support to the top cover upper ring plate by bolts, and leave a gap between the top cover support and the spindle retaining ring;

[0019] (3) Remove the seat ring upper plate and the cylindrical valve support ring in sequence, and install the lifting lugs on the top cover upper plate;

[0020] (4) being suspended on the lifting lug by means of a wire rope and a hook of a hoisting machine, and performing a hoisting action;

[0021] (5) After the top cover support member is against the spindle retaining ring, remove the connecting bolts between the spindle and the motor shaft;

[0022] (6) Continue the lifting action by the lifting machine to lift the pump unit as a whole.

[0023] Furthermore, the gap value of the gap in step (2) is determined according to the axial gap value between the upper crown of the runner and the lower ring plate of the top cover.

[0024] The beneficial effects of the present invention are:

[0025] 1. The construction method of the large water pump provided by the present invention that can realize overall lifting and disassembly is no longer necessary to disassemble the top cover, water guide bearing, main shaft and other components one by one compared with other existing solutions. Instead, the overall lifting of the water pump unit can be realized by only disassembling the ring plate on the seat ring and the cylindrical valve support ring, which greatly reduces the disassembly and assembly period during maintenance.

[0026] 2. The large-scale water pump provided by the present invention can be lifted and disassembled as a whole, and the disassembly procedure is simple. Since the disassembly bolt position is greatly reduced, the probability of damage to the bolts during engagement and disassembly will be greatly reduced. The maintenance work of the large-scale water pump unit can be carried out quickly and reliably, and the efficiency of the maintenance work will be greatly improved.

[0027] 3. The large water pump that can be lifted and disassembled as a whole provided by the present invention can reduce the manpower, material resources and time invested in the pump station during maintenance, and the maintenance work can be carried out after only targeted training of the maintenance personnel, which will reduce the comprehensive cost of the pump station for the maintenance of the water pump unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a large water pump that can be hoisted and disassembled as a whole, provided by the invention;

[0029] Figure 2 It is a partial structural schematic diagram of a large-scale water pump provided by the present invention that can realize overall lifting and disassembly, in which a cylindrical valve is in a closed state;

[0030] Figure 3 It is a partial structural schematic diagram of a large-scale water pump provided by the present invention that can realize overall lifting and disassembly, in which a cylindrical valve is in an open state;

[0031] Figure 4 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0032] Figure 5 yes Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0033] The following are marked in the attached figure:

[0034] 1-runner chamber, 2-top cover, 3-base, 4-main shaft, 5-runner, 6-seat ring upper ring plate, 7-seat ring lower ring plate, 8-metal volute, 9-cylindrical valve servomotor, 10-tailwater pipe, 11-cylindrical valve body, 12-upper sealing gasket, 13-lower sealing gasket, 14-main shaft retaining ring, 15-top cover support, 16-seat ring vertical ring, 17-motor shaft, 18-E bolt, 19-cylindrical valve support ring, 20-top cover upper ring plate, 21-top cover lower ring plate, 22-A bolt, 23-B bolt, 24-C bolt, 25-D bolt. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the invention product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Example 1

[0042] like Figure 1 As shown, in this embodiment, a large-scale water pump that can be lifted and disassembled as a whole is specifically disclosed, including a main shaft 4, a top cover 2, a base 3 and a fixed guide vane. The top cover 2 is assembled and connected to the main shaft 4, and the top cover 2 corresponds to the base 3. A runner chamber 1 is formed between the base 3 and the top cover 2, and a runner 5 running in the runner chamber 1 is mounted on the main shaft 4. External water flows into the runner chamber 1 through the fixed guide vane, and the runner 5 rotates under the drive of the hydraulic force. The main shaft 4 is assembled and connected with the motor shaft 17 through the D bolt 25, and then the motor shaft 17 is driven by the main shaft 4 to rotate to generate electricity. The above is the working principle and partial component structure of the existing large-scale energy storage pump, which belongs to the prior art and will not be repeated here.

[0043] The spindle 4 is provided with a spindle retaining ring 14, which is integrally forged on the spindle 4 and becomes a whole with the spindle 4, and a top cover support 15 is sleeved on the spindle 4, and the top cover support 15 can freely move relative to the spindle 4; the top cover 2 includes a top cover upper ring plate 20 and a top cover lower ring plate 21, and the top cover support 15 is located between the spindle retaining ring 14 and the top cover upper ring plate 20, and the top cover support 15 and the top cover upper ring plate 20 are connected by E Bolt 18 is connected; it also includes a cylindrical valve support ring 19, the upper end of the cylindrical valve support ring 19 is overlapped with the upper ring plate 20 of the top cover and is connected by A bolts 22, the lower end of the cylindrical valve support ring 19 is overlapped with the lower ring plate 21 of the top cover and is connected by C bolts 24, and the cylindrical valve support ring 19 is equipped with a cylindrical valve kit, which can realize the rapid opening and closing of large water pumps according to the specified opening and closing time to meet the starting and stopping requirements of the energy storage pump unit.

[0044] like Figure 2As shown, it also includes a seat ring upper ring plate 6 and a seat ring lower ring plate 7, the seat ring upper ring plate 6 is connected with a seat ring vertical ring 16, the other end of the seat ring vertical ring 16 is overlapped with the cylindrical valve support ring 19 and connected by a B bolt 23 to realize the assembly of the seat ring upper ring plate 6; the seat ring lower ring plate 7 is assembled and connected with the base 3 to realize the assembly of the seat ring lower ring plate 7; a water inlet channel is formed between the seat ring upper ring plate 6 and the seat ring lower ring plate 7, and the channel is a ring-shaped structure. The water inlet channel is connected with the runner chamber 1, and the external water flows into the runner chamber 1 through the water inlet channel, and the water flow impacts the runner 5 to cause the runner 5 to rotate. In order to further improve the efficiency of the external water flow entering the water inlet channel, the seat ring upper ring plate 6 and the seat ring lower ring plate 7 are both connected with a metal volute 8, and the metal volute 8 has a good drainage effect.

[0045] like Figure 2 As shown, the cylindrical valve kit includes a cylindrical valve body 11 and a cylindrical valve servomotor 9 for driving the cylindrical valve body 11 to perform lifting motion. The cylindrical valve servomotor 9 is mounted on the cylindrical valve support ring 19, and the lifting motion of the cylindrical valve body 11 switches the water inlet channel to a sealed or open state. Preferably, a plurality of cylindrical valve servomotors 9 are provided, and each cylindrical valve servomotor 9 moves synchronously to drive the cylindrical valve body 11 to perform lifting motion.

[0046] In this embodiment, a valve body assembly hole is formed between the seat ring upper ring plate 6 and the top cover lower ring plate 21, and the valve body assembly hole is movably assembled with the cylindrical valve body 11. The valve body assembly hole and the seat ring lower ring plate 7 are both provided with sealing gaskets corresponding to the cylindrical valve body 11. The specific structure is as follows:

[0047] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, an annular outer edge is provided at one end of the cylindrical valve body 11, and an inclined end face is provided at the other end; an upper sealing gasket 12 corresponding to the annular outer edge is provided in the valve body assembly hole, and a lower sealing gasket 13 corresponding to the inclined end face is provided on the lower ring plate 7 of the seat ring; when the large water pump is in the open state, the cylindrical valve body 11 rises to the highest position and the bottom end face of the cylindrical valve body 11 is flush with the bottom end face of the lower ring plate 21 of the top cover, so that water flows smoothly through the water inlet channel; when the large water pump is in the shutdown state, the cylindrical valve body 11 descends to the lowest position and the bottom end face of the cylindrical valve body 11 is pressed against the lower sealing gasket 13 and sealed, and at the same time, the outer edge of the cylindrical valve body 11 is pressed against the upper sealing gasket 12 and sealed, so as to realize the isolation of the runner chamber 1 to form a closed cavity.

[0048] In order to further reduce the volume of the inflated and pressurized water, the cylindrical valve body 11 is placed close to the high-pressure side of the runner 5. When the cylindrical valve body 11 seals the connecting cavity, the formed sealed cavity is relatively smaller, so that the volume of the inflated and pressurized water will be relatively smaller, and the pressure-generating start-up time will be shorter. The specifications of the compressed air equipment will also be smaller, and its operation will be more stable and reliable.

[0049] like Figure 1 As shown, it also includes a tailwater pipe 10, which is sealed with the runner chamber 1. During the process of inflation and water pressure, when the water level drops to an appropriate scale position of the tailwater pipe 10, the energy storage water pump can be started.

[0050] The top cover support member 15 includes a plurality of support member monomers, each of which is spliced ​​with each other in sequence to form a conical shell shape or a tower shape, and the end of each support member monomer is connected to the top cover upper ring plate 20 through an E bolt 18. The top cover support member 15 can be formed by fastening each support member monomer to the top cover upper ring plate 20 in sequence. When performing a lifting operation, the top cover support member 15 is used to transfer the weight of the rotating parts (i.e., including the rotating shaft, the impeller 5 and related accessories, etc.) to the top cover 2; and the size of the top cover support member 15 should be designed based on the rigidity calculation and be able to withstand the total mass of the rotating parts in the large water pump.

[0051] Example 2

[0052] Based on the large water pump that can be hoisted as a whole and disassembled provided in Example 1, a construction method for a large water pump that can be hoisted as a whole and disassembled is also provided in this embodiment. The construction method comprises the following steps:

[0053] (1) Remove the main shaft 4 seal matched with the main shaft 4 by special tools, and lift the main shaft 4 seal out or place it on the top cover 2 to protect the main shaft 4 seal from being damaged during the subsequent lifting process;

[0054] (2) The top cover support 15 is fastened to the corresponding position of the top cover upper ring plate 20 by means of the E bolts 18, and an appropriate gap is left between the top cover support 15 and the main shaft retaining ring 14. The gap value is determined according to the axial gap value between the upper crown of the runner 5 and the lower ring plate 21 of the top cover. To ensure the normal operation of the large water pump, the axial gap value between the upper crown of the runner 5 and the lower ring plate 21 of the top cover should have a reasonable design value. During the lifting operation, the top cover 2 will be displaced relative to the main shaft 4. When the top cover support 15 is pressed against the main shaft retaining ring 14, the gap value between the upper crown of the runner 5 and the lower ring plate 21 of the top cover should be within a reasonable design range.

[0055] (3) The ring plate 6 on the seat ring is disassembled by removing the B bolt 23, and the cylindrical valve support ring 19 is disassembled by removing the A bolt 22 and the C bolt 24, and the lifting lugs are installed on the corresponding bolt holes after the A bolt 22 is removed;

[0056] (4) Suspending the lifting lugs by means of a wire rope and a hook of a lifting machine, starting the lifting machine and performing a lifting action;

[0057] (5) The top cover 2 will move vertically upward under the action of the crane until the top cover support 15 presses against the main shaft retaining ring 14, and then the D bolt 25 used to connect the main shaft 4 and the motor shaft 17 is removed; at this time, the weight of the entire rotating component is transferred to the top cover 2 by the top cover support 15, and the top cover 2 is lifted by the lifting lugs, so that the top cover 2 and the rotating component can be lifted synchronously;

[0058] (6) The hoisting machine continues to lift the water pump unit as a whole, thus completing the overall lifting work of the water pump unit during installation.

[0059] The above construction method can effectively solve the problem that the various components of the unit need to be dismantled one by one during the maintenance of the water pump unit, the construction period is long, and the disassembly and assembly procedures are complicated. It greatly shortens the maintenance period of the unit, improves the efficiency of the maintenance work, and provides a strong guarantee for the safe and reliable operation of the water pump unit.

[0060] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A large water pump capable of being hoisted and disassembled as a whole, comprising a main shaft and a top cover, a runner is mounted on the end of the main shaft and the runner is provided with a runner chamber, characterized in that: The main shaft is provided with a main shaft clamping ring, and a top cover support is sleeved on the main shaft; the top cover includes a top cover upper ring plate and a top cover lower ring plate, the top cover support is located between the main shaft clamping ring and the top cover upper ring plate, and the top cover support is connected to the top cover upper ring plate by bolts; it also includes a cylindrical valve support ring, the two ends of the cylindrical valve support ring are respectively connected to the top cover upper ring plate and the top cover lower ring plate by bolts, and the cylindrical valve support ring is equipped with a cylindrical valve kit; it also includes a seat ring upper ring plate and a seat ring lower ring plate, the seat ring upper ring plate is connected to a seat ring stand ring, and the other end of the seat ring stand ring is connected to the cylindrical valve support ring by bolts; A water inlet channel is formed between the upper ring plate of the seat ring and the lower ring plate of the seat ring, and the water inlet channel is connected to the runner chamber; the cylindrical valve kit includes a cylindrical valve body and a cylindrical valve servomotor driving the cylindrical valve body to perform lifting movement, the cylindrical valve servomotor is mounted on the cylindrical valve support ring, and the lifting movement of the cylindrical valve body seals or opens the water inlet channel; a valve body assembly hole is formed between the upper ring plate of the seat ring and the lower ring plate of the top cover, the cylindrical valve body is movably assembled in the valve body assembly hole, and sealing gaskets corresponding to the cylindrical valve body are provided on the valve body assembly hole and the lower ring plate of the seat ring; and a lifting ear is installed on the upper ring plate of the top cover.

2. The large water pump capable of being hoisted and disassembled as a whole according to claim 1, characterized in that: The top cover support member includes a plurality of support member monomers, each support member monomer is combined with each other to form a conical shell shape, and the end of each support member monomer is connected to the top cover upper ring plate through bolts.

3. The large water pump capable of being hoisted and disassembled as a whole according to claim 1, characterized in that: The main shaft clamping ring is formed on the main shaft by integral forging.

4. A construction method for a large water pump capable of being hoisted and dismantled as a whole, characterized in that: The construction method is applied to the large water pump capable of being hoisted and disassembled as a whole as claimed in claim 1, and comprises the following steps: (1) Remove the spindle seal that matches the spindle and lift out the spindle seal; (2) Fasten the top cover support to the top cover upper ring plate with bolts, and leave a gap between the top cover support and the spindle retaining ring; (3) Remove the seat ring upper plate and the cylindrical valve support ring in sequence, and install the lifting lugs on the top cover upper plate; (4) Suspending the crane on the lifting lug through the wire rope and hook of the crane, and performing the lifting action; (5) After the top cover support is against the spindle retaining ring, remove the connecting bolts between the spindle and the motor shaft; (6) Continue the lifting action by the lifting machine to lift the pump unit as a whole.

5. The construction method of a large water pump capable of being hoisted and dismantled as a whole according to claim 4, characterized in that: The gap value of the gap in step (2) is determined according to the axial gap value between the upper crown of the runner and the lower ring plate of the top cover.

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