Coupling fixing device for flap valve matched with through-wall reflux pump

Abstract

The utility model discloses a coupling fixing device for a flap valve matched with a through-wall reflux pump. The coupling fixing device is composed of a rotatable coupling guide rod, a top fixing sleeve, a bottom fixing sleeve, a lifting coupling frame, a rotating handle and other main components. When the flap valve needs to be overhauled, the coupling guide rod is rotated through the handle to enable the bottom fixing plate to be disengaged, the coupling frame is lifted through the steel wire rope at the moment, the coupling frame drives the flap valve cover to move upwards along the coupling guide rod to be separated from the water surface for overhauling, and the flap valve cover is lowered along the coupling guide rod after overhauling is completed. After the flap valve is lowered in place, the handle is rotated to enable the fixing plate connected with the bottom of the coupling guide rod to restore to the original position to fix the flap valve cover, and the flap valve enters a normal use state. The device is simple in structure and convenient to operate, and the purpose of regular maintenance of the flap valve is effectively achieved.

Description

Technical Field

[0001] The utility model belongs to the field of municipal sewage treatment and relates to a coupling fixing device for a flap door matched with a through-wall reflux pump. Background Art

[0002] The flap gate is a mechanical device used to control water flow. It is mainly used in places such as the outlet pipe of the reflux pump to prevent water from flowing back. If it falls off during use, it will seriously affect the treatment capacity of the biological pool. Its role is self-evident. The flap gate is composed of a valve seat, a valve cover, a sealing ring and a hinge. It is often used at the outlet of pipes in various projects such as urban drainage, river management, and sewage treatment to play the role of overflow and check. It is worth noting that the flap gate is only used for the outlet of one-way water flow. The working principle of the flap gate is very simple. The valve cover is in a balanced state without the action of external force. Under the action of water flow or external force, the valve cover door leaf opens or closes. When the water level of the drainage is higher than the outlet, the flap gate installed at the tail end of the outlet pipe is immersed in water. If the external water pressure is greater than the water pressure in the pipe, the flap gate will automatically close the seal to prevent water from flowing back.

[0003] However, although the flap valve plays an important role in preventing water backflow, we cannot ignore its possible problems. For example, long-term use and wear may cause the flap valve cover to fall off the hinge and fall to the bottom of the pool. In addition, the sealing performance will decrease, which will affect its anti-backflow effect. Therefore, we need to regularly lift the flap valve cover out of the water for inspection and maintenance without stopping the water to ensure that it is in good working condition. Summary of the invention

[0004] The purpose of the utility model is to provide a coupling and fixing device for a flap door matched with a through-wall reflux pump. In view of the characteristics that the flap door is easy to fall off after long-term operation and cannot be repaired and replaced due to large water volume, even if it falls off accidentally, it can be reinstalled underwater without stopping the water, thereby effectively reducing the environmental risk of substandard sewage treatment in the biological pool, greatly improving the reliability and safety of the biological pool operation, and achieving the purpose of continuous operation without stopping the water for repair.

[0005] The specific technical scheme of the utility model is: a coupling fixing device for a flap door of a through-wall reflux pump, comprising a concrete wall and a flap door valve seat arranged on the concrete wall, two positioning lugs and a bottom fixing sleeve are respectively arranged on the top surface of the flap door valve seat, a top fixing sleeve is arranged on the upper part of the concrete wall, a coupling guide square tube rod is vertically fixedly arranged below the top fixing sleeve, a rotating shaft is sleeved inside the coupling guide square tube rod, a rotating handle is hingedly connected to the upper end of the rotating shaft, the lower end of the rotating shaft passes through the bottom of the bottom fixing sleeve and is fixedly connected to a fan-shaped fixing plate, the fan-shaped fixing plate and the rotating shaft are perpendicular to each other, a coupling sleeve is slidably sleeved on the coupling guide square tube rod, and an L-shaped right-angle lifting coupling is fixedly arranged on the coupling sleeve The right-angle lifting coupling frame has a horizontally arranged stop and limit protrusion on the inner sides of both sides of the lower end, and the rotation of the rotating shaft drives the fan-shaped fixed plate to resist the stop and limit protrusion to prevent the rotating shaft from moving up and down. The outer sides of both sides of the lower end of the right-angle lifting coupling frame are horizontally extended outward, and an anti-rotation limit protrusion is set respectively. The lower end of the right-angle lifting coupling frame is hinged to a flip frame through a connecting pin shaft, and the flap door valve cover is fixed to the flip frame. The bottom surface of the flip frame contacts with the anti-rotation limit protrusion to prevent the flap door valve cover from flipping downward under the action of gravity, ensuring that the flap door valve cover always remains in an inclined state, and the pin shaft is stuck in the top groove of the positioning lug; the right-angle lifting coupling frame is also connected to a lifting stainless steel wire rope.

[0006] The device consists of a rotatable coupling guide rod, a top fixing sleeve, a bottom fixing sleeve, a lifting coupling frame, a rotating handle and other main components. When the flap door needs to be repaired, the coupling guide rod is rotated by the handle to disengage the bottom fixing plate. At this time, the coupling frame is lifted by the wire rope, and the coupling frame drives the flap door valve cover to move upward along the coupling guide rod and out of the water for repair. After the repair is completed, the flap door valve cover is lowered along the coupling guide rod. After it is lowered into place, the handle is rotated to restore the fixing plate connected to the bottom of the coupling guide rod to the original position to fix the flap door valve cover. At this time, the flap door enters the normal use state.

[0007] Compared with the prior art, the advantages of the utility model are:

[0008] 1. The newly added coupling lifting device has a simple structure, low difficulty in processing and manufacturing parts, and low production cost;

[0009] 2. Easy to install and fix;

[0010] 3. Easily realize the maintenance of flap valve cover without water shutoff;

[0011] 4. If the flap valve cover falls off accidentally, you can lower it and install a new one without affecting the normal operation of production;

[0012] 5. The entire device is made of stainless steel, and the structure is safe and reliable to ensure long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 This is a diagram of the utility model with the middle door in place and in normal use;

[0015] Figure 3 This is a diagram of the inspection or lower state of the middle door of the utility model;

[0016] Figure 4 This is the front view of the utility model when the middle door is lowered;

[0017] Figure 5 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0018] Figure 6 for Figure 2 A schematic diagram of the enlarged structure of part B in FIG.

[0019] Figure 7 for Figure 3 Schematic diagram of the enlarged structure of part C;

[0020] Figure 8 It is a schematic diagram of the three-dimensional structure of the right-angle lifting coupling frame in the utility model.

[0021] In the figure: 1. rotating handle; 2. top fixing sleeve; 3. concrete wall; 4. coupling guide square tube rod; 5. right-angle lifting coupling frame; 55. flip frame; 6. flap valve cover; 7. flap valve seat; 8. bottom fixing sleeve; 9. fan-shaped fixing plate; 10. lifting stainless steel wire rope; 11. anti-rotation limit block; 12. stop limit block; 13. positioning lug; 14. connecting pin shaft; 15. coupling sleeve; 16. rotating shaft. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] A coupling fixing device for a flap door supporting a through-wall reflux pump, such as Figure 1 , 2, 3, 4, 5, 6, 7, and 8, comprising a concrete wall 3 and a flap valve seat 7 arranged on the concrete wall, two positioning lugs 13 and a bottom fixing sleeve 8 are respectively arranged on the top surface of the flap valve seat 7, a top fixing sleeve 2 is arranged on the upper part of the concrete wall, a coupling guide square tube rod 4 is vertically fixedly arranged below the top fixing sleeve, a rotating shaft 16 is sleeved in the coupling guide square tube rod, a rotating handle 1 is hinged to the upper end of the rotating shaft 16, the lower end of the rotating shaft 16 passes through from below the bottom fixing sleeve 8 and is fixedly connected to a fan-shaped fixing plate 9, the fan-shaped fixing plate 9 and the rotating shaft 16 are perpendicular to each other, a coupling sleeve 15 is slidably sleeved on the coupling guide square tube rod 4, and an L-shaped straight The right angle lifting coupling frame 5, a horizontally arranged stop limit convex block 12 is respectively arranged on the inner sides of the lower ends of the right angle lifting coupling frame 5, the rotation of the rotating shaft 16 drives the fan-shaped fixing plate 9 to abut against the stop limit convex block 12 to prevent the rotating shaft 16 from moving up and down, and the outer sides of the lower ends of the right angle lifting coupling frame 5 are respectively extended horizontally outwardly to set an anti-rotation limit convex block 11, and the lower end of the right angle lifting coupling frame 5 is hinged to a pair of flip frame 55 through a connecting pin shaft 14, and the flip frame 55 is fixedly connected to the flap valve cover 6, and the bottom surface of the flip frame 55 contacts the anti-rotation limit convex block 11 to prevent the flap valve cover 6 from flipping downward under the action of gravity, ensuring that the flap valve cover 6 always maintains an inclined state to facilitate close fit with the flap valve seat 7. The connecting pin shaft 14 is inserted into the top groove of the positioning lug 13; the right angle lifting coupling frame 5 is also connected to the lifting stainless steel wire rope 10.

[0024] When the flap valve cover 6 needs to be taken out for maintenance, first turn the rotating handle 1 90 degrees counterclockwise, and rotate the rotating handle 1 along the end hinge axis to stand up to facilitate the right-angle lifting coupling frame 5 to disengage from the coupling guide rod 4. The rotating handle 1 also drives the coupling guide square tube rod 4 and the fan-shaped fixing plate 9 at the bottom to rotate 90 degrees. At this time, the right-angle lifting coupling frame 5 and the flap valve cover 6 are already in a disengaged state. The wire rope 10 is lifted upward to lift the flap valve cover 6 and the right-angle lifting coupling frame 5 along the coupling guide square tube rod 4 to the surface for maintenance. The coupling guide square tube rod 4 is made of finished square tubes as a whole. The top and bottom are welded with steel pipes of the required size to realize the overall rotation of the coupling guide square tube rod. The coupling sleeve 15 is also made of square tubes to ensure that the flap valve cover 6 always keeps one direction and does not rotate during the lowering process. After the flap valve cover 6 is lowered into place, turn the rotating handle 1 90 degrees clockwise to fix the flap valve.

[0025] By attaching Figure 8 It can be seen that two limit protrusions are provided at the lower part of the right-angle arm of the right-angle lifting coupling frame 5. The anti-rotation limit protrusion 11 limits the flap valve cover 6 from turning downward under gravity, and the stop limit protrusion 12 limits the right-angle lifting coupling frame 5 and the flap valve cover 6 from moving upward through the fan-shaped fixing plate 9.

Claims

1. A coupling and fixing device for a flap valve of a through-wall reflux pump, comprising a concrete wall and a flap valve seat arranged on the concrete wall, characterized in that: Two positioning lugs and a bottom fixing sleeve are respectively arranged on the top surface of the flap valve seat, a top fixing sleeve is arranged on the upper part of the concrete wall, a coupling guide square tube rod is vertically fixedly arranged below the top fixing sleeve, a rotating shaft is sleeved in the coupling guide square tube rod, a rotating handle is hinged on the upper end of the rotating shaft, the lower end of the rotating shaft passes through the bottom of the bottom fixing sleeve and is fixedly connected to a fan-shaped fixing plate, the fan-shaped fixing plate and the rotating shaft are perpendicular to each other, a coupling sleeve is slidably sleeved on the coupling guide square tube rod, an L-shaped right-angle lifting coupling frame is fixedly arranged on the coupling sleeve, and a horizontally arranged inner side of both sides of the lower end of the right-angle lifting coupling frame is respectively arranged The stop limit block, the rotation of the rotating shaft drives the fan-shaped fixed plate to resist the stop limit block to prevent the rotating shaft from moving up and down, and an anti-rotation limit block is horizontally extended outward on the outer sides of the lower end of the right-angle lifting coupling frame, and the lower end of the right-angle lifting coupling frame is hinged to a flip frame through a connecting pin shaft, and the flap door valve cover is fixed to the flip frame. The bottom surface of the flip frame contacts with the anti-rotation limit block to prevent the flap door valve cover from flipping downward under the action of gravity, ensuring that the flap door valve cover always remains in an inclined state, and the pin shaft is stuck in the top groove of the positioning lug; the right-angle lifting coupling frame is also connected to a lifting stainless steel wire rope.

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