Sludge valve of rotational flow sedimentation tank

Abstract

The utility model belongs to the technical field of steel turbid circulating water treatment, and relates to a sludge discharge valve of a rotational flow sedimentation tank, which comprises a sludge discharge valve seat embedded in a water suction well bottom plate of the rotational flow sedimentation tank; the valve plate is mounted on the sludge discharge valve seat through a valve plate rotating shaft, the sludge discharge valve is closed when the valve plate rotates upwards to be horizontal, and the sludge discharge valve is opened when the valve plate rotates downwards; the lifting unit comprises a winding lifting mechanism and an elastic supporting mechanism, the winding lifting mechanism is connected with the upper end of the valve plate through a rope, the rope is supported at the upper end of the elastic supporting mechanism, the elastic supporting mechanism is provided with a positioning rule, and the reading of the positioning rule is related to the thickness of a sludge layer on the valve plate. The pressure of the self weight of sludge on the valve plate is applied to the force transmission shaft through the rope to cause deformation of the spring, the deformation quantity of the spring is reflected through the position, pointed by the positioning pointer, of the positioning ruler, and the size of the deformation quantity of the spring can indirectly reflect the thickness of the sludge at the top of the valve plate. And an operator can conveniently know the mud amount and master the mud discharging time.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel turbid circulating water treatment, in particular to a mud discharge valve for a cyclone sedimentation tank. Background Art

[0002] Cyclone sedimentation tank is the most commonly used primary sedimentation facility for turbid water treatment in steel enterprises. Figure 1 In the steel production process, iron oxide scale produced during the steelmaking process flows through the slag flushing ditch 101 into the cyclone sedimentation tank, where it settles in the bottom sludge storage area 102. It is then removed from the sedimentation tank by a grab bucket. However, due to the rising flow rate in the sedimentation tank's sedimentation area, the finer iron oxide particles in the turbid circulating water are unable to fully settle in the sedimentation area and instead flow into the suction well 103 with the rising water. The agitation of the sludge and water by the grab bucket in the central tube 104, which then carries some fine iron oxide particles with the rising water into the suction well 103. Due to inertia and gravity, some of the iron oxide that enters the suction well settles to the bottom of the well. Over time, this accumulation gradually forms an iron oxide sludge layer at the bottom of the well, potentially blocking the inlet of the suction pipe 105 and affecting the normal operation of the lift pump 106. The sludge at the bottom of the suction well is submerged, making it impossible to clean the sludge near the suction pipe opening of the lift pump during normal production. Furthermore, the bottom of the suction well is a confined space, making manual cleaning a safety risk. Therefore, it is necessary to install a mud discharge valve at the bottom of the suction well, especially near the suction pipe of the self-priming pump, to discharge the accumulated sludge into the mud storage area.

[0003] In order to solve the problem of mud accumulation in the cyclone pool, a mud discharge valve is installed on the bottom plate of the cyclone pool water suction well, such as Figure 2 In the figure, the mud discharge valve cylinder 200 is cylindrical, with a sealed top cover and a mud flow hole 201 on the side. The transmission shaft 202 is driven up and down by turning the hand wheel, thereby driving the mud discharge valve cylinder 200 to move up and down in the cylindrical valve seat. When the mud discharge valve cylinder moves downward to the bottom of the valve seat, the mud discharge valve top cover seals the valve seat, and neither mud nor water can flow; when the mud discharge valve cylinder moves upward, the mud flow hole 201 is exposed, and the sludge flows downward from the mud flow hole 201 and falls into the mud storage area below the bottom plate of the water suction well.

[0004] The existing technology has a small flow path for sludge discharge. When discharging sludge, the water flow is simultaneously pressed toward the center, which affects the water flow rate and the flushing force of the water flow on the sludge, resulting in poor actual sludge discharge effect. Manual entry into the suction well is still required for cleaning.

[0005] Since the sludge is composed of iron oxide, it has poor fluidity and high specific gravity. When the sludge accumulates to a certain amount on the top cover of the sludge discharge valve, it becomes compacted. It not only lacks fluidity, but also presses on the top cover of the sludge discharge valve, making it difficult to open the sludge discharge valve, thereby losing its sludge discharge function. Manual sludge removal has to be adopted, which creates a major safety hazard.

[0006] When the top of the valve cover is covered by silt, if the silt thickness is too large, the sludge gravity is all applied to the top of the valve cover, and it cannot be lifted by the handwheel opener, causing the mud discharge valve to be unable to open.

[0007] Moreover, during normal production, since sludge is generated in the underwater space and the turbidity of the turbid ring water is high, it is impossible to detect the sludge accumulation by conventional means, and it is impossible to judge the thickness of the sludge accumulation at the bottom of the suction well and the timing of sludge discharge. Utility Model Content

[0008]

Technical Issues

[0009] The sludge discharge valve for the cyclone sedimentation tank provided by the present application has a large flow cross-section. During the process of opening the valve plate, the valve plate can be opened completely by utilizing the deadweight of the sludge on the top of the valve plate and the static pressure of the water body, thereby reducing the force required to manually open the sludge discharge valve. This solves the problem that the existing sludge discharge valve has a small fluid flow path, and the water flow is simultaneously pressed toward the center during sludge discharge, which affects the water flow rate and the flushing force of the water flow on the sludge, resulting in poor actual sludge discharge effect. The pressure of the deadweight of the sludge on the valve plate is transmitted to the spring through a rope, and the change in the deformation of the spring is used to indirectly reflect the thickness of the sludge on the top of the valve plate, thereby solving the problem that the existing sludge discharge valve cannot judge the thickness of the sludge accumulation at the bottom of the suction well and the timing of sludge discharge.

[0010]

Technical solution

[0011] A sludge discharge valve for a cyclone sedimentation tank, comprising:

[0012] The mud discharge valve seat is embedded in the bottom plate of the water suction well of the cyclone sedimentation tank;

[0013] The valve plate is installed on the mud discharge valve seat through the valve plate rotating shaft. It is rotated upward to close the mud discharge valve, and rotated downward to open the mud discharge valve;

[0014] The lifting unit includes a hoisting mechanism and an elastic support mechanism. The hoisting mechanism is connected to the upper end of the valve plate through a rope. The rope is supported on the upper end of the elastic support mechanism. The elastic support mechanism is provided with a positioning ruler. The reading of the positioning ruler is correlated with the thickness of the sludge layer on the valve plate.

[0015] Optionally, the mud discharge valve seat includes a waterproof wing ring arranged on the outer periphery, and the waterproof wing ring is embedded in the bottom plate of the water suction well.

[0016] Optionally, the mud discharge valve seat has a sealing plate and a valve plate sealing gasket. The sealing plate is fixedly connected to the inner side of the waterproof wing ring, and a valve plate sealing gasket is also fixedly connected to the lower end face of the sealing plate. When the valve plate is rotated upward to a horizontal position, the valve plate contacts the valve plate sealing gasket to close the mud discharge valve.

[0017] Optionally, the elastic support mechanism includes a transmission support, a vertical force transmission shaft is provided on the transmission support, the upper end of the force transmission shaft supports the rope, and the lower part of the force transmission shaft is connected to the elastic element.

[0018] Optionally, a fixed pulley is connected to the top of the power transmission shaft through a fixed pulley shaft, and the upper end of the power transmission shaft supports the rope, which means that the rope is connected to the hoisting mechanism after passing around the top of the fixed pulley.

[0019] Optionally, the hoisting mechanism includes a winch and a guide wheel. The rope passes upward through the bottom plate of the water pump layer, passes around the top of the fixed pulley, and then passes around the lower end of the guide wheel to be connected to the winch.

[0020] Optionally, a vertical shaft sleeve is fixedly connected to the top of the transmission support, and the force transmission shaft slides through the shaft sleeve.

[0021] Optionally, the transmission support is fixedly connected to a transmission support base, and the transmission support base is fixed to the bottom plate of the water pump layer by anchor bolts.

[0022] Optionally, the lower part of the force transmission shaft is connected to the elastic element, which means that the force transmission shaft passes through the transmission support base, a limiting ring is fixedly connected to the outer periphery of the force transmission shaft, and a spring is sleeved on the force transmission shaft between the limiting ring and the transmission support base.

[0023] Optionally, a positioning pointer is fixedly connected to the limiting ring.

[0024] Beneficial effects

[0025] The cyclone sedimentation tank sludge discharge valve of the present application applies the pressure of the sludge's own weight on the valve plate to the force transmission shaft through a rope, causing the spring to deform, and the deformation of the spring is reflected by the position of the positioning scale pointed by the positioning pointer. The size of the spring deformation can indirectly reflect the thickness of the sludge on the top of the valve plate, which is beneficial for the operator to understand the amount of sludge and grasp the timing of sludge discharge.

[0026] The cyclone sedimentation tank mud discharge valve of the present application has a large valve plate flow cross-section. When mud discharge is required, the rope is loosened by the winch, and the mud discharge valve can be fully opened by utilizing the dead weight of the mud on the top of the valve plate and the static pressure of the water body, thereby reducing the force required to manually open the mud discharge valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above features and technical advantages of the present invention will become clearer and easier to understand by describing the embodiments thereof in conjunction with the following drawings.

[0028] Figure 1 It is a structural diagram of a cyclone sedimentation tank.

[0029] Figure 2It is a structural diagram of a mud discharge valve of a cyclone sedimentation tank in the prior art.

[0030] Figure 3 It is a structural schematic diagram of the mud discharge valve of the cyclone sedimentation tank in an embodiment of the present application.

[0031] Figure 4 It is a top view of the mud discharge valve seat of an embodiment of the present application.

[0032]

Brief reference numerals

[0033] Valve plate shaft 1, valve plate 2, mud discharge valve seat 3, rope buckle 4, wing ring 5, valve plate sealing gasket 6, sealing plate 7, force transmission shaft 8, transmission support base 9, anchor bolt 10, transmission support 11, spring 12, limit ring 13, bushing 14, rope 15, fixed pulley shaft 16, fixed pulley 17, positioning pointer 18, positioning ruler 19, guide wheel 20, waterproof winch 21, lifting unit 100, slag flushing ditch 101, mud storage area 102, water suction well 103, center tube 104, water suction pipe 105, lifting pump 106, mud discharge valve tube 200, sludge flow hole 201, transmission shaft 202. DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art will recognize that the described embodiments may be modified in various ways or combinations thereof without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of the claims. Furthermore, throughout this specification, the drawings are not drawn to scale, and like reference numerals represent like parts.

[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after the connection. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying 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 embodiments of the present application. Among them, the two components are obtained by an integrated structure through an integrated molding process, which means that in the process of forming one of the two components, the component is connected to the other component, and there is no need to connect the two components together through reprocessing (such as bonding, welding, snap connection, screw connection).

[0036] This embodiment provides a sludge discharge valve for a cyclone sedimentation tank, such as Figure 3 As shown, it includes a mud discharge valve seat 3, which is embedded in the bottom plate of the water suction well of the cyclone sedimentation tank; a valve plate shaft 1, which is installed in the mud discharge valve seat 3 and is used to be rotatably connected to the valve plate 2, so that the valve plate 2 can rotate around the valve plate shaft 1; the valve plate 2 is rotated upward to horizontal around the valve plate shaft 1 to close the mud discharge valve, and is rotated downward to open the mud discharge valve; a lifting unit 100 is connected to the valve plate 2 by a rope 15, and the opening of the valve plate 2 is controlled by pulling and releasing the rope, and the thickness of the sludge layer on the top of the valve plate 2 is associated with the spring deformation, and the opening time of the mud discharge valve is determined according to the thickness of the sludge layer.

[0037] like Figure 3 、 Figure 4 As shown, the mud discharge valve seat 3 is annular, and its outer periphery is embedded in the hole of the suction well bottom plate, so that mud and sand can fall onto the closed valve plate through the inner hole of the annular ring. For example, the outer periphery of the mud discharge valve seat 3 can be a waterproof wing ring 5, which is embedded in the suction well bottom plate and plays a role in fixing the mud discharge valve seat 3. For example, if the hole of the suction well bottom plate is square, the mud discharge valve seat 3 is a square with vertical through holes, and waterproof wing rings 5 ​​are fixedly connected to it on all four sides. The waterproof wing rings 5 ​​are embedded in the hole of the suction well bottom plate, thereby fixing the mud discharge valve seat 3 to the hole of the suction well bottom plate.

[0038] The valve plate shaft 1 is fixedly connected at both ends to one end of the mud discharge valve seat 3, rotatably connected to the valve plate 2, allowing the valve plate 2 to rotate about the valve plate shaft 1. The valve plate 2 is sized to block the vertical through-hole of the mud discharge valve seat 3. The valve plate 2 rotates upward about the valve plate shaft 1 to a horizontal position, closing the mud discharge valve and collecting sediment above the valve plate. Rotating downward opens the mud discharge valve and discharges the sediment into the sedimentation area. A rope buckle 4 is fixedly connected to the upper end surface of the valve plate 2 opposite the valve plate shaft 1, for connection to one end of a rope 15.

[0039] In some embodiments, the mud discharge valve seat 3 comprises a sealing plate and a valve plate sealing gasket. The sealing plate 7 is fixedly connected to the inner side of the waterproof wing ring 5. A valve plate sealing gasket is also fixedly connected to the lower end surface of the sealing plate 7, and the valve plate sealing gasket may be bonded to the lower end surface of the sealing plate 7. The sealing plate 7 supports the valve plate sealing gasket 6 and limits the position of the valve plate 2. When the valve plate 2 rotates upward about the valve plate rotation axis 1 to a horizontal position, the sealing plate 7 blocks further rotation, allowing the valve plate 2 to closely contact the valve plate sealing gasket 6, thereby closing the valve.

[0040] The lifting unit 100 includes a hoisting mechanism and an elastic support mechanism. The hoisting mechanism includes a rope 15, a winch 21 and a guide wheel 20. The elastic support mechanism includes a transmission support 11, a sleeve 14, a force transmission shaft 8, a spring 12, a limiting ring 13, a fixed pulley shaft 16 and a fixed pulley 17.

[0041] A vertical sleeve 14 is fixed to the top of the transmission support 11, and a power transmission shaft 8 is slidably connected within the sleeve 14. The top of the power transmission shaft 8 is connected to a fixed pulley 17 via a fixed pulley shaft 16. A guide wheel 20 and a winch 21 are provided on the bottom plate of the water pump layer. The rope 15 passes upward through the bottom plate of the water pump layer, passes through the top wheel groove of the fixed pulley 17, and passes around the lower wheel groove of the guide wheel 20 before connecting to the winch 21. The rotation of the winch drives the rope 15 to move, transmitting the tension to the rope buckle 4 of the valve plate, pulling the valve plate upward to rotate to a horizontal position, thereby closing the mud discharge valve, and rotating it downward to open the mud discharge valve.

[0042] Exemplarily, the transmission support 11 is fixedly connected to the transmission support base, and the transmission support base can be fixed to the bottom plate of the water pump layer by anchor bolts 10.

[0043] In some embodiments, the outer periphery of the force transmission shaft 8 is fixedly connected to a limit ring 13, and the force transmission shaft sleeve below the limit ring 13 is provided with a spring 12. The upper end of the spring 12 is constrained by the limit ring 13, and the lower end is constrained by the transmission support base. The force transmission shaft passes through the transmission support base, and a positioning pointer 18 is provided on the limit ring 13, which moves synchronously with the up and down movement of the force transmission shaft. A vertical positioning ruler 19 is also fixed to the transmission support 11, and the positioning ruler 19 has a scale. The moving positioning pointer 18 points to the fixed positioning ruler 19, indicating the up and down displacement of the force transmission shaft. In addition, the spring can also be replaced by other elastic elements such as rubber.

[0044] Under normal conditions, the sludge discharge valve is closed, with valve plate 2 in a horizontal position. Due to the rising flow rate in the sedimentation zone of the cyclone sedimentation tank, the finer iron oxide particles in the turbid circulating water are unable to fully settle in the sedimentation zone and instead flow with the rising water into the suction well 103. The agitation of the sludge and water by the grab bucket in the center barrel 104, which grabs the sludge, carries some fine iron oxide particles with it into the suction well 103 along with the rising water. The iron oxide that enters the suction well settles on the top surface of valve plate 2 due to inertia and gravity. Over time, a layer of iron oxide sludge gradually forms on the top surface of valve plate 2. When the rope 15 is released by the winch 21, the valve plate 2 rotates downward about the valve plate shaft 1, thereby opening the sludge discharge valve and allowing the sludge to fall off the valve plate 2 and into the sludge storage area at the bottom of the cyclone tank.

[0045] Furthermore, due to the high specific gravity of the sludge, it gradually accumulates and exerts pressure on valve plate 2. Under the influence of the weight of the valve plate 2 and the sludge layer, the valve plate 2 exerts a gradually increasing tension on rope 15. The other end of rope 15 is inside the winch. When the winch is not rotating, the rope's tension is applied to the fixed pulley. Constrained by sleeve 14, the downward pressure of fixed pulley 17 causes force transmission shaft 8 to squeeze spring 12, forcing the force transmission shaft downward. This causes the position of positioning scale 19, indicated by positioning pointer 18 on limit ring 13, to change. Positioning pointer 18 allows the operator to monitor the spring's deformation at any time. The magnitude of the spring's deformation indirectly reflects the thickness of the sludge layer on top of the valve plate. For example, if the sludge layer is 1 cm thick, the positioning pointer reads 5 cm; if the sludge layer is 2 cm thick, the positioning pointer reads 10 cm. This helps operators understand the amount of sludge and determine the timing of sludge discharge. Multiple positioning pointer readings and sludge layer thickness data can be recorded to determine the relationship between the positioning pointer reading and the sludge layer thickness. After correlating the positioning pointer reading with the thickness of the sludge layer, the approximate accumulation of the sludge layer can be determined by the positioning pointer reading, which can guide the timing of opening the sludge discharge valve.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sludge discharge valve for a cyclone sedimentation tank, characterized in that: include: The mud discharge valve seat is embedded in the bottom plate of the water suction well of the cyclone sedimentation tank; The valve plate is installed on the mud discharge valve seat through the valve plate rotating shaft. It is rotated upward to close the mud discharge valve, and rotated downward to open the mud discharge valve; The lifting unit includes a hoisting mechanism and an elastic support mechanism. The hoisting mechanism is connected to the upper end of the valve plate through a rope. The rope is supported on the upper end of the elastic support mechanism. The elastic support mechanism is provided with a positioning ruler. The reading of the positioning ruler is correlated with the thickness of the sludge layer on the valve plate.

2. The sludge discharge valve for a cyclone sedimentation tank according to claim 1, characterized in that: The mud discharge valve seat includes a waterproof wing ring arranged on the outer periphery, and the waterproof wing ring is embedded in the bottom plate of the water suction well.

3. The sludge discharge valve for a cyclone sedimentation tank according to claim 2, characterized in that: The mud discharge valve seat has a sealing plate and a valve plate sealing gasket. The sealing plate is fixedly connected to the inner side of the waterproof wing ring. A valve plate sealing gasket is also fixedly connected to the lower end surface of the sealing plate. When the valve plate is rotated upward to a horizontal position, the valve plate contacts the valve plate sealing gasket to close the mud discharge valve.

4. The sludge discharge valve for a cyclone sedimentation tank according to claim 1, characterized in that: The elastic support mechanism includes a transmission support, on which a vertical force transmission shaft is provided. The upper end of the force transmission shaft supports the rope, and the lower part of the force transmission shaft is connected to the elastic element.

5. The sludge discharge valve for a cyclone sedimentation tank according to claim 4, characterized in that: A fixed pulley is connected to the top of the power transmission shaft through a fixed pulley shaft. The upper end of the power transmission shaft supports the rope, which means that the rope is connected to the hoisting mechanism after passing around the top of the fixed pulley.

6. The sludge discharge valve for a cyclone sedimentation tank according to claim 5, characterized in that: The hoisting mechanism includes a hoist and a guide wheel. The rope passes upward through the bottom plate of the water pump layer, passes around the top of the fixed pulley, and then passes around the lower end of the guide wheel to be connected to the hoist.

7. The sludge discharge valve for a cyclone sedimentation tank according to claim 4, characterized in that: A vertical shaft sleeve is fixedly connected to the top of the transmission support, and the force transmission shaft slides through the shaft sleeve.

8. The sludge discharge valve for a cyclone sedimentation tank according to claim 4, characterized in that: The transmission support is fixedly connected to the transmission support base, and the transmission support base is fixed to the water pump layer bottom plate through anchor bolts.

9. The sludge discharge valve for a cyclone sedimentation tank according to claim 8, characterized in that: The lower part of the force transmission shaft is connected to the elastic element, which means that the force transmission shaft passes through the transmission support base, the outer periphery of the force transmission shaft is fixedly connected to a limiting ring, and a spring is sleeved on the force transmission shaft between the limiting ring and the transmission support base.

10. The sludge discharge valve for a cyclone sedimentation tank according to claim 9, characterized in that: A positioning pointer is fixedly connected to the limiting ring.

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