KR20160064316A - Flap valve of gate pump device - Google Patents

Abstract

The present invention is to provide a flap valve of a gate pump device, which is light, is corrosion-resistant, and has improved strength, thereby being hardly damaged and having an increased service life. For the same, the flap valve of a gate pump device of the present invention includes: a non-metallic valve disc which is prepared at a rear part of a pump casing having a pump inlet allowing water to flow in for drainage by being installed at a through-hole formed at a floodgate, and is opened during drainage and is blocked during backflow; and an L-shaped non-metallic rib which connects the valve disc to a hinge connection part prepared at a rear upper part of the pump casing while being able to be rotated by a hinge pin. A metal reinforcing sheet corresponding to a side shape of the rib is applied to a side of the rib and then is fastened by a bolt.

Description

[0001] Flap valve of gate pump [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate pump apparatus having a pump function capable of preventing foreign water from entering and discharging domestic water to the outside, and more particularly, to a flap valve for preventing reverse flow in a gate pump apparatus having a horizontal axis.

In order to prevent the infiltration of foreign water and to discharge the domestic water to the outside water, the water gate (gate) is installed in the river or the reservoir. At this time, An underwater pump is installed. However, a submersible pump that is disposed directly on a water gate or the like and installed in a waterway has been proposed in various ways as represented by, for example, a gate pump. This submersible pump generally comprises a pump inlet casing, an impeller, a motor, a pre-guiding or post-guiding wing, a discharge casing, a flap valve, .

Pumps are generally arranged vertically or horizontally, and for either type of pumping and drainage pump, it is inevitable to suck the foreign material into the pump. When this foreign matter, that is, the trash flow, is sucked into the pump, it adheres to the impeller, the hub, and the like, which hinders pump operation.

There is no problem if the trash is sucked into the pump and passed along with the water. However, when the impeller or the hub of the pump does not always adhere to the impeller or the hub, or when the impeller and the casing or the liner are caught in the gap, the safety device such as the overload prevention device operates by increasing the rotational power, This is a problem if it happens frequently.

In order to prevent these problems, conventionally, dust removal equipment is installed in the upstream water channel of the pump to prevent the flow of the waste so as to prevent foreign substances from being sucked into the pump as much as possible. It is also known on the pump side that a retracting blade is used to increase the clearance between the liner and the liner in order to improve the penetration of the waste into the pump. In addition, many water gates are installed in waterways such as rivers for purposes such as flood control. There are drain holes in this gate, and many gate are equipped with an underwater pump. A submersible pump is placed directly at the gate, which is to forcibly drain the running water of the channel when the gate is closed. There are many types of submersible pumps, and the pump, which is usually installed on the gate, is called a gate pump.

These submersible pumps are mainly of the type that is different depending on the direction in which the pump rotation shaft is installed, and there are those of the horizontal axis type and the vertical axis type. In addition, in order to improve the suction performance of the submersible pump, it is necessary to install the suction port as close as possible to the bed (or bottom of the water channel). When the water level of the underwater pump is lowered due to the water channel side, if the immersion depth required for the submersible pump is not secured, a swirl, an underwater swirling, a swirling flow, Inhalation of water becomes worse. The air intake vortex, the underwater vortex, and the swirling flow of the air swirl, the cavitation, the drop of the head are lowered, and the performance of the submersible pump, noise, vibration, Causing mechanical problems such as wing erosion.

In the vertical axis type, since the pump inlet is opened toward the bottom, the pump device is not installed by deeply pouring the water to the bottom, and there is little fear of cavitation due to lack of water and the pump operation is stable. In recent years, most of the transverse axis gate pumps are used. In the present invention, the gate pump (axial pump, or the like) of the horizontal axis is used. In particular, to improve the flap valve which is installed at the rear end of the gate pump device and opens at the time of drainage and blocks at the time of backflow.

FIG. 1 is a submersible pump device disclosed in Korean Patent No. 10-0982610 (entitled Underwater Pump with Anti-Swirl Generation Device), in which a horizontal through hole is formed in a conventional water gate (gate) A flap valve 54 is rotatably mounted on the upper end of the pump casing 52 by a hinge hinge pin 53 at the rear end of the gate pump device 51, The pump device 51 is operated while the water gate 55 is closed when the water level S 'is higher than the water level S' on the water-side, so that water on the water S 'side is forcibly drained to the outside water side. The pressure of the water forcedly discharged backward by the operation of the pump 51 causes the flap valve 54 to be forcedly opened and pumped to the outside water side to drain the water. At this time, when the water on the outside water side flows backward to the inside water side, Flap valve < RTI ID = 0.0 > 54 & Motor generates a restored garment hinge the hinge pin 53 as the center point by ryuap is closed the flap valve 54 and blocking the reverse flow of water.

However, the flap valve 54 is made of a nonmetallic material such as HDPE plastic which has a small specific gravity and is not corroded with water, instead of a heavy metal material, so that it is easily operated by the hydraulic pressure action from the pump and is not corroded, The light flap valve 54 is designed to reduce the head loss by generating a small resistance due to the water pressure drained from the pump. However, in order to pivotally connect the rear end of the pump casing 52 by the hinge pin 53 Since the ribs 56 in the shape of a letter are used, the self-ribs 56 made of this plastic material have insufficient strength, cracks are generated in the areas where the end faces are changed such as corner areas, There is a problem that the maintenance cost is increased due to frequent breakage due to the reduction of the cross-sectional area.

Korean Patent No. 10--982610 Korea Announcement No. 1995-0005003

Accordingly, it is an object of the present invention to provide a flap valve for a gate pump apparatus which is light, strong against corrosion, and has increased strength and less damage, thereby improving service life.

In order to accomplish the above object, the present invention provides a valve disc comprising a non-metallic material which is provided at a rear end of a pump casing having a pump inlet for introducing water for discharging wastewater into a through- Shaped nonmetallic material rib rotatably connecting the valve disc to a hinge connection portion provided at a rear upper portion of the pump casing by a hinge pin, the flap valve comprising: The metal reinforcing plate having the shape of a side surface thereof is punched and then bolted.

According to the present invention, in the vertical portion of the metal reinforcement plate, a close contact surface which is in close contact with the surface of the valve disc is bent and fixed to the valve disc by bolts.

According to the present invention, the ribs and the hinge connection portions are formed at two intervals.

According to an embodiment of the present invention, there is provided a valve disk which is provided at a rear end of a pump casing having a pump inlet for introducing water for discharging water, provided in a through hole formed in a water gate, And a non-metallic material rib of a letter shape for rotatably connecting the valve disc to a hinge connection portion provided at an upper portion of the pump casing rear end by a hinge pin, characterized in that the side face of the rib And a metal reinforcing plate is punched to cover the corner portion with the surface of the valve disc and then bolted together.

Further, the valve disc and the valve seat to which the valve disc closely contacts are formed to be inclined at 10 degrees with respect to the vertical surface.

Further, the valve seat is equipped with a rubber seal member, the rubber seal member is provided with wings on both right and left sides thereof, and the lower end thereof is formed with teeth so as not to come out of the mounting groove.

As described above, according to the present invention, a stainless steel metal reinforcing plate is attached to the side surface of a non-metallic material rib of a letter shape that rotatably connects a valve disc to be injection-molded with plastic, which is a non-metallic material, to a hinge connection portion by a hinge pin The metal reinforcing plate material blocks a crack generated at the corner portion of the rib having a weak strength by the bolt tightening, and the service life of the flap valve is greatly increased. Particularly, the close contact portion bent from the rib closely contacts the surface of the valve disc, The rigidity of the metal reinforcing plate itself is greatly increased, and the risk of damage due to cracks at the connecting corners of the ribs and the valve disc is greatly reduced.

Figure 1 is a prior art.
FIG. 2 is a view showing a water channel in which a gate pump device according to the present invention is installed at a gate.
3 is a cross-sectional view showing a gate pump apparatus according to the present invention.
4 is a side view (front view) of the casing of the gate pump apparatus according to the present invention.
5 is a view showing a flap valve according to the present invention.
6 is a right side view of the flap valve according to the present invention.
7 is a view showing a state in which the valve disc of the flap valve according to the present invention is opened.
8 is a perspective view showing a metal reinforcing plate according to the present invention.
9 is a front view showing a metal reinforcing plate according to the present invention.
10 is a right side view showing a metal reinforcing plate according to the present invention.
11 is a view showing a metal reinforcing plate to which the balance weight according to the present invention is attached.
12 is a cross-sectional view of the flap valve according to the present invention.

In the following detailed description, reference is made to the accompanying drawings which show, by way of illustration, specific embodiments in which the invention may be practiced.

These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are not necessarily mutually exclusive, even if different. By way of example, certain aspects, structures, or features described herein in connection with one embodiment may be practiced by other embodiments without departing from the spirit and scope of the invention.

It is also to be understood that the position or arrangement of individual elements within each disclosed embodiment may be modified without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the invention is defined only by the appended claims appropriately interpreted and by the full range of equivalents to which such claims pertain. In the drawings, like reference numerals refer to the same or similar functions in the various figures.

3 is a cross-sectional view of a gate pump apparatus according to the present invention, and Fig. 4 is a cross-sectional view of a casing of a gate pump apparatus according to the present invention. Fig. As seen from the side (front side), the term "posterior" in the present invention refers to the forward position of the impeller side into which water is introduced.

2, a conventional automatic vibration damper 61 is provided in front of the channel 60 to filter off the vibration of the water. The automatic vibration damper 61 is provided at the rear of the vibration damper 61 with a water passage 60, A horizontal piercing hole 64A is formed in the water gate 64 and a gate pump device 65 is installed in the through hole 64A .

The water gate 64 rises by the water gate lifter 66 provided on the upper side of the hydrological structure 62 to open the drain port 63 to allow the domestic water 67 to be sent to the outside water 68 in a large amount, The water gate 64 is lowered by the operation of the lifting device 66 to block the drainage port 63 to block the domestic water 67 and to operate the gate pump device 65 when necessary so that the internal water 67 is supplied to the outside water 68 To be transported.

As shown in Fig. 4, the gate pump device 65 has a structure in which a pump 69 on the left side and a flap valve 70 on the right side, which are provided in the drain port of the water gate, are coupled with each other with a fastening flange 71 interposed therebetween The pump 69 includes a pump casing 73 having an inlet 72 at the front end thereof, an impeller (propeller) 74 provided inside the casing 73, and a motor assembly 74 for rotationally driving the impeller 74 Side flange 76 is formed at the rear end of the casing 73 and a valve-side flange 78 is also formed at the valve body 77 of the flap valve 70, And the flanges 76 and 78 are fastened to both sides of the flange 71 by fastening bolts 79.

The fastening flange 71 is a rectangular or circular plate member having a circular hole at the center and larger than the flanges 76 and 78 at both sides. The fastening flange 71 is provided on the water gate 64, And a hooking member 81 having a hooking hole 80 is formed at the upper end of the front face of the fastening flange 71 so as to protrude therefrom.

The ring member 81 formed on the fastening flange 71 is installed on the ceiling of the hydrological structure 62 at a previous time as shown in FIG. 2 when the gate pump apparatus 65 needs to be lifted for the purpose of trouble or inspection 3) hooked to the lower end of the pulling wire rope in the hoist 82 device is engaged with the hooking hole 80 of the ring member 81 to connect the gate pump device 65, The fastening bolt 83 fastening the fastening flange 71 to the hoistway 64 wall is fastened to the hoist 82 by the pulling wire rope through the hoop member 81. Therefore, There is no fear that the heavy gate pump device 65 will fall down even if it is disassembled and loosened, so that a separate supporting structure or manpower is not necessary to prevent the gate pump device 65 from falling down, and all of the fixing bolts 83 are released When the gate pump device 65 The hoist 82 is wound around the pulling wire rope and lifts the gate pump device 65 to the upper side of the water surface to perform inspection and maintenance work on the ground. The presence of the ring member 81 makes it easy and easy to carry and assemble the gate pump device 65, and in particular, greatly enhances convenience in maintenance work.

4 is a view of the casing of the gate pump apparatus according to the present invention viewed from a front position in which water is introduced. The inlet port 72 of the pump casing 73, more precisely, the front end of the impeller casing 84, And a posture guide vane 85 is formed on the side of the inlet port 72. The posture guide vane 85 constitutes a substantial part of the present invention. So that the outer end thereof is fixed to the inner circumferential surface 86 of the pump casing 73 and the inner end thereof is extended toward the center of the pump so as to have the space 87 which displays the region by the alternate long and short dash line in Fig. And thus the free end 85A is extended and thus the free end 85A is not supported or interfered with by any member by the space 87 forming the inflow path.

In the present invention as described above, a guide collar, that is, a post guide vane 85, is radially formed in the pump casing 73 of a gate pump device (axial flow pump) installed in the water gate and is not fixed to the boss (impeller casing 84) The cross sectional area of the inflow path is expanded by the space 87 formed at intervals apart from the impeller casing (impeller casing), so that the flow of the swirling flow and the rotating direction of the impeller 74 (propeller) At the same time, the fluid flows through the space 87 secured by the inflow channel, and the flow of the fluid is guided along the streamlined surface of the boss (impeller casing), minimizing the resistance of the fluid, So that the pump efficiency can be improved. In this way, the water that has passed through the impeller 74 and forms a stable laminar flow, Which will open the flap valve 70 forces the discharge side oesu 68.

5 is a flap valve 70 of a gate pump apparatus constituting a gist of the present invention. The flap valve 70 is connected to the rear end of a pump casing 73 through a pump-side flange 76, The end surface of the valve body 77 is formed by the valve seat 88 to abut against the valve seat 88 to block the drainage or to prevent the valve seat 88, And a valve disc 89 which is injection-molded by plastic which drains pumped drain water to the outside water side.

The valve disc 89 is disposed at the rear end of the pump casing 73, more specifically, at an upper portion of the valve body 77. The valve disc 89 has one or more, preferably, Shaped rib 92 rotatably connected to the hinge connection portion 90 of the hinge connection portion 90 through a hinge pin 91. The rib 92 is integrally injection-molded with the valve disc 89 .

Another rib 92A perpendicular to the rib 92 is formed in the valve disc 89 for reinforcing the strength of the valve disc 89. The valve disc 89 has a substantially U-shaped rib 92 for rotating the valve disc 89 A metal reinforcing plate 93 of a metal material, preferably a corrosion-resistant stainless steel, is attached to at least one side along the shape of the rib 92, that is, the bolt 94 is fastened by being fastened.

The metal reinforcing plate 93 has a horizontal portion 96 having a hinge pin hole 95 and a vertical portion 97 bent perpendicularly from the horizontal portion 96 as shown in FIGS. And a tight contact surface portion 98 which is in close contact with the surface of the valve disc 89 is bent from the vertical portion 97 and is fastened with bolts 94 for fixing the metal reinforcing plate 93 A plurality of bolt holes 99 are formed.

As shown in FIGS. 6 and 7, on the other part of the rib 92, a metal reinforcing plate material having a shape of a letter (or a letter C) (a shape having only a vertical portion and a close contact surface portion) between the horizontal ribs 92A, The metal reinforcing plate 93B shown in FIG. 11 is mounted for reinforcement on the lower end of the rib 92, and the metal reinforcing plate 93B shown in FIG. A balance weight mounting hole 102 is formed in addition to the bolt hole 99 so that the balance weight 101 made of a metal such as stainless steel or the like is passed through the rib 92 horizontally, .

Fig. 12 is a sectional view taken along the line AA of Fig. 6, in which an annular mounting groove 103 is formed on the valve seat 88, a rubber sealing member 100 is mounted in the mounting groove 103, 100 are provided on both sides with thin blades 104 having a good surface adhering force and reverse teeth 106 are formed on the outer side of the lower end body 105 fitted in the mounting groove 103 so that the lower end body The valve disc 89 is pivoted to the valve seat 88 side to be closed so that the rubber seal member 100 does not protrude due to the teeth 106 in the reverse direction Thereby preventing the rubber seal member 100 from adhering to the surface of the valve disc 89 and preventing water from leaking to the outside water.

7, the valve disc 88, which is in close contact with the valve disc 89, is inclined at an angle of about 6 to 20 degrees, preferably about 10 degrees, to the vertical surface, The pressure of the valve disk 89 is reduced by the pressure prism action of the fluid when the pump disk 89 is pumped so that the valve disk 89 is opened naturally and easily even at the beginning of the pump operation in which a small amount of water is pumped, And the shock caused by the back flow can be smoothly closed even when closed.

According to the present invention as described above, the metal reinforcing plates 93 (93A) and (93B) having rigidity are reinforced at corner portions and hinge pin hole portions where the cross section of the plastic ribs 92, , Even when the flap valve 70 is repeatedly opened and closed.

The above-described embodiments are merely illustrative of the technical structure of the present invention, and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to exemplary embodiments thereof, it is to be understood that such detailing embodiments of the invention may be modified by those skilled in the art and that part of the technical features may be modified without departing from the spirit of the invention, And such subject matter should be included within the scope of the technical method of the invention claimed below.

60: Waterway (lagoons) 61: Automatic dust collector
62: Hydraulic structure 63: Drain
64: Water gate 65: Gate pump device
66: Hydrological relief 67: Domestic water (side)
68: Outer water (side) 69: Pump
70: flap valve 71: fastening flange
72: inlet 73: casing
74: impeller 75: motor assembly
76: pump side flange 77: valve body
78: Valve side flange 79: Bolt
80: filtering hole 81: fastening means for lifting (ring member)
82: Hoist 83: Fixing bolt
84: Impeller casing 85: Post guide wing
85A: Free end of the post guide vane 86: Inner diameter face
87: space (inflow channel) 88: valve seat
89: valve disc 90: hinge connection
91: Hinge pin 92, 92A:
93, 93A, 93B: metal reinforcing plate 94: bolt
95: Hinge pin hole 96: Horizontal part
97: vertical portion 98: close contact surface
99: bolt hole 100: rubber seal member
101: balance weight 102: balance weight mounting hole
103: mounting groove 104: wing
105: lower body 106: tooth

Claims (6)

A valve disc provided at a rear end of a pump casing having a pump inlet for introducing water for drainage, provided in a through hole formed in the water gate, Shaped nonmetallic material rib rotatably connected to a hinge connection portion provided at a hinge connection portion of the flap, wherein a metal reinforcing plate along the side surface of the rib is formed on the side surface of the rib, And then the bolts are fastened to the flap valve. 2. The flap valve of claim 1, wherein a vertically extending portion of the metal reinforcement plate is formed by bending and extending a close contact surface of the valve disk closely to the surface of the valve disc, and is fastened to the valve disc by bolting. The flap valve according to claim 1 or 2, wherein two of the rib-shaped ribs and the hinge connection portions are formed with an interval therebetween. A valve disc provided at a rear end of a pump casing having a pump inlet for introducing water for drainage, provided in a through hole formed in the water gate, Shaped nonmetallic material rib rotatably connected to a hinge connection portion provided at a hinge connection portion of the valve disk, the flap valve comprising: a reinforcing member for reinforcing a corner portion between a side surface of the rib and a surface of the valve disc Wherein the metal reinforcing plate is punched and then bolted to the flap valve. 5. The flap valve of claim 1 or 4, wherein the valve disc and the valve sheet to which the valve disc closely contacts are formed to be inclined at 10 DEG with respect to the vertical surface. The valve seat according to any one of claims 1 to 4, wherein the valve seat is provided with a rubber seal member, the rubber seal member is provided with wings on both right and left sides thereof, and the lower end thereof is formed with teeth The flap valve of the gate pump device.

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