Impermeable compact filler structure

Abstract

The utility model provides an anti-seepage compact packing structure, the packing box installation precision can meet the requirement of a water pump unit, water seepage and water leakage can be prevented, and the unit operation stability is high. The packing structure comprises a packing box and a pre-buried straight pipe, the packing box is annular, the packing box is arranged on a pump shaft in a sleeving mode, a space is reserved between the packing box and the pump shaft, a packing ring is arranged in the packing box, packing is filled in the packing box, the packing is tightly pressed between the cavity wall of an inner cavity of the packing box and the outer wall of the pump shaft, and the pre-buried straight pipe is arranged in the space. A packing gland is arranged at an opening of the packing box, and a water pan is mounted at the bottom of the packing box; the pre-buried straight pipe is arranged in the vertical shaft wall, and the device is characterized in that the packing box is fixedly installed on one side of the vertical shaft wall reinforcing steel bar through a transition installation plate, the vertical shaft wall reinforcing steel bar is embedded in the vertical shaft wall, the other side of the vertical shaft wall reinforcing steel bar is fixedly connected with the pre-buried straight pipe, and a cavity of the packing box is arranged in the pre-buried straight pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of tubular pumps, in particular to a water-seepage-proof compact filler structure. Background Art

[0002] The shaft through-flow pump is suitable for pumping water or other liquids with physical and chemical properties similar to water. The maximum temperature of the pumped liquid is 40°C. It is mainly used in large-scale water supply and drainage projects, long-distance water delivery, flood control and drainage, urban river water diversion, irrigation and other large-scale water conservancy projects.

[0003] The installation of the tubular pump unit requires close coordination between the pump room civil engineering structure and the mechanical metal parts of the water pump. Since the civil engineering structure includes the inlet and outlet channels cast in concrete, the mechanical metal parts of the tubular pump unit include the water pump body and electromechanical equipment such as the gear box and motor. The water pump body runs in water, while the electromechanical equipment needs to run in the atmosphere. Therefore, the electromechanical equipment needs to be set in an isolated shaft in the water inlet channel, and the water pump body passes through the shaft wall to connect the electromechanical equipment in the water well. A stuffing box is usually used as a dynamic and static transition seal at the connection between the water pump and the shaft wall.

[0004] Existing filler structures such as Figure 1 As shown, a packing structure includes a packing box 1 and a pre-buried straight pipe 8, the packing box 1 is annular, the packing box 1 is sleeved on the pump shaft 9, a space is left between the packing box 1 and the pump shaft 9, a packing ring 2 is arranged in the packing box 1, the packing 3 is filled in the packing box 2, the packing 3 is pressed between the packing box 1 and the pump shaft 9, and a packing gland 5 is arranged at the opening of the packing box 1; the packing box 1 is located in the shaft, the packing box 1 is installed on the shaft wall 11 through the packing box mounting seat 4, the packing box mounting seat 4 is provided with buried anchor bolts 7, the packing box mounting seat 4 and the buried anchor bolts 7 are cast in the shaft wall 11 through concrete 6; the pre-buried straight pipe 8 is arranged in the shaft wall 11, the center lines of the pre-buried straight pipe 8 and the pump shaft 9 coincide with the center lines of the water inlet flow channel and the water outlet flow channel, one end of the pump shaft 9 is connected to the thrust radial bearing box 12, and a water receiving tray 10 is installed at the bottom of the packing box 1.

[0005] This packing structure is difficult to locate before pouring concrete, and it is difficult to fix the anchor bolts. During the solidification process of the concrete for pouring the packing box, the installation position of the packing box changes more or less, resulting in the verticality and concentricity of the packing box installation often failing to meet the installation accuracy requirements of the water pump unit. In addition, since the packing box installation concrete and the shaft wall concrete are poured twice, there is a gap at the joint, resulting in water seepage and leakage. At the same time, in the existing structure, the packing box protrudes from the inner wall of the shaft and occupies the shaft space, which lengthens the pump shaft, makes the thrust radial bearing box fulcrum farther away, increases the pump shaft deflection, is not conducive to controlling the critical speed and resonance, and results in low unit operation stability. Summary of the invention

[0006] In view of the shortcomings of the existing packing structure, such as low installation accuracy of the packing box, easy water seepage and leakage, lengthened pump shaft length, and low operating stability of the unit, the utility model provides a water-seepage-proof compact packing structure, the installation accuracy of its packing box can meet the requirements of the water pump unit, can prevent water seepage and leakage, and has high operating stability of the unit.

[0007] A water-seepage-proof compact packing structure, comprising a packing box and a pre-buried straight pipe, wherein the packing box is annular and is sleeved on a pump shaft, with a space left between the packing box and the pump shaft, a packing ring is arranged in the packing box, the packing box is filled with packing, the packing is pressed tightly between the packing box and the pump shaft, a packing gland is arranged at the opening of the packing box, and a water receiving tray is installed at the bottom of the packing box; the pre-buried straight pipe is arranged in the wall of the shaft, one end of the pump shaft is connected to a thrust radial bearing box, the center lines of the pre-buried straight pipe and the pump shaft coincide with the center lines of a water inlet channel and a water outlet channel, and the characteristic is that the packing box is fixedly installed on one side of the shaft wall steel bars through a transition mounting plate, the shaft wall steel bars are embedded in the shaft wall, the other side of the shaft wall steel bars is fixedly connected to the pre-buried straight pipe, and the cavity of the packing box is arranged in the pre-buried straight pipe.

[0008] It is further characterized by:

[0009] A sealing ring is provided between the stuffing box and the transition mounting plate;

[0010] The stuffing box and the transition mounting plate are connected by screws, the transition mounting plate is connected to the shaft wall steel bars by welding, and the shaft wall steel bars are connected to the embedded straight pipes by welding.

[0011] In the above structure of the utility model, the shaft wall steel bars of the shaft wall are used to install the stuffing box. The shaft wall steel bars are embedded in the shaft wall when pouring the shaft wall, so that there is no need to pour concrete twice during the installation of the stuffing box. The position of the stuffing box will not change during the installation process. The installation accuracy is enough to meet the requirements of the water pump unit. At the same time, the shrinkage joints of the interface between the later concrete and the earlier concrete are eliminated, preventing water seepage and leakage in the shaft. The setting of the sealing ring further prevents water seepage and leakage. The stuffing box body is set in the embedded straight pipe, which does not occupy the shaft space, shortens the length of the pump shaft, reduces the deflection of the pump shaft, and improves the stability of the unit operation. The transition mounting plate, the shaft wall steel bars and the embedded straight pipe are connected by welding to merge them into a whole, making the unit structure more compact, the shaft system rigidity better, and the adaptability to the water pump transition working condition and shutdown runaway working condition stronger, further improving the stability of the unit operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the prior art;

[0013] Figure 2 A schematic diagram of the main view of the utility model;

[0014] Figure 3 It is a schematic diagram of the utility model from a top view;

[0015] Figure 4 This is a schematic diagram of the position of the utility model when applied in a unit. DETAILED DESCRIPTION

[0016] See Figures 2 to 4 A water-proof compact packing structure includes a packing box 13 and a pre-buried straight pipe 8. The pre-buried straight pipe 8 is filled with a water pump transport medium, usually water. The packing box 13 is annular and is mounted on the pump shaft 9. A space is left between the packing box 13 and the pump shaft 9. A packing ring 2 is arranged in the packing box 13. The packing 3 is filled in the packing box 13. The packing 3 is pressed tightly between the packing box 13 and the pump shaft 9. A packing gland 5 is arranged at the opening of the packing box 13. A water receiving tray 10 is installed at the bottom of the packing box 13. The water receiving tray 10 is used to collect lubricating water that normally overflows during the operation of the unit, and collects it to the sewage well through the drainage joint at the bottom.

[0017] The embedded straight pipe 8 is arranged in the shaft wall 11, and the center lines of the embedded straight pipe 8 and the pump shaft 9 coincide with the center lines of the water inlet flow channel 17 and the water outlet flow channel 18. One end of the pump shaft 9 is connected to the thrust radial bearing box 12, which acts as a fulcrum for the pump shaft 9. The pump shaft 9 has another fulcrum in the water outlet flow channel 18 (not shown in the figure).

[0018] The stuffing box 13 is installed on one side of the shaft wall steel bar 15 through the transition mounting plate 14. The shaft wall steel bar 15 is embedded in the shaft wall 11. The other side of the shaft wall steel bar 15 is fixedly connected to the embedded straight pipe 8. The shaft wall steel bar 15 is embedded in the shaft wall 11 when the shaft wall is cast. During the installation of the stuffing box 13, only one concrete pouring is performed, and there is no need to pour concrete twice, which avoids the problem of joint water seepage and leakage caused by multiple concrete pouring and the problem of the change of the installation position of the stuffing box 13 during the second concrete pouring. In the figure, the stuffing box 13 and the transition mounting plate 14 are connected by screws, the transition mounting plate 14 is connected to the shaft wall steel bar 15 by welding, and the shaft wall steel bar 15 is connected to the embedded straight pipe 8 by welding. The welding installation method makes the shaft wall steel bar 15, the transition mounting plate 14, and the embedded straight pipe 8 merged into a whole, making the unit structure more compact, the shaft system rigidity better, and the adaptability to the water pump transition working condition and the shutdown runaway working condition is stronger, which improves the stability of the unit operation.

[0019] The cavity of the stuffing box 13 is arranged in the pre-buried straight pipe 8, does not occupy the shaft space, shortens the length of the pump shaft 9, makes the thrust radial bearing box closer to the shaft wall 11, shortens the distance between the fulcrums of the pump shaft 9, reduces the deflection of the pump shaft 9, improves the stability of the unit operation, and at the same time can shorten the shaft length, reduce the amount of civil excavation and concrete usage, and reduce construction costs.

[0020] A sealing ring 16 is provided between the stuffing box 13 and the transition mounting plate 14 to further prevent water leakage and seepage.

Claims

1. A water-seepage-proof compact packing structure, comprising a packing box and a pre-buried straight pipe, wherein the packing box is annular, and the packing box is sleeved on the pump shaft, and a space is left between the packing box and the pump shaft, and a packing ring is arranged in the packing box, and a packing is filled in the packing box, and the packing is pressed between the packing box and the pump shaft, and a packing gland is arranged at the opening of the packing box, and a water receiving tray is installed at the bottom of the packing box; the pre-buried straight pipe is arranged in the wall of the shaft, and one end of the pump shaft is connected to the thrust radial bearing box, and the center lines of the pre-buried straight pipe and the pump shaft coincide with the center lines of the water inlet flow channel and the water outlet flow channel, and the characteristics are as follows: The stuffing box is fixedly installed on one side of the shaft wall steel bar through a transition mounting plate. The shaft wall steel bar is embedded in the shaft wall. The other side of the shaft wall steel bar is fixedly connected to the embedded straight pipe. The cavity of the stuffing box is arranged in the embedded straight pipe.

2. The water-proof compact packing structure according to claim 1, characterized in that: A sealing ring is arranged between the stuffing box and the transition mounting plate.

3. A water-proof compact packing structure according to claim 1 or 2, characterized in that: The stuffing box and the transition mounting plate are connected by screws, the transition mounting plate is connected to the shaft wall steel bars by welding, and the shaft wall steel bars are connected to the embedded straight pipes by welding.

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