Swimming pool handrail

Abstract

The invention provides a swimming pool handrail which comprises a handrail pipe, the base material of the handrail pipe is a carbon steel circular pipe or a 201 stainless steel circular pipe, and a fully-coated protective layer is formed on the surface of the handrail pipe through a modified polyethylene (PE) powder dipping process. According to the swimming pool handrail, the carbon steel or stainless steel base pipe is combined with the surface full-coating modified polyethylene (PE) powder dipping technology, and the corrosion resistance, durability and economical efficiency of the product are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the application and surface treatment technology field of swimming pool handrails, in particular to a swimming pool handrail. BACKGROUND

[0002] Swimming pool handrails are indispensable safety auxiliary facilities in swimming pool areas, and their main function is to provide safe and convenient access to the water for swimmers (especially children, the elderly, the disabled, and swimmers with high physical exertion), and to provide reliable gripping support in the water, effectively improving the safety and comfort of swimming pool use. In addition to serving as an auxiliary access to the water, reducing the difficulty of entering and exiting the pool and the risk of slipping, the core function of the swimming pool handrail also includes providing water support and safety protection. That is, swimmers can grasp the handrail when resting, adjusting their posture, or seeking stability in the water to prevent accidental sinking or choking. Swimmers can also grasp the handrail in an emergency when they are physically exhausted, have a sudden cramp, or feel unwell.

[0003] The mainstream material of current swimming pool handrails is 304 stainless steel, as it has good corrosion resistance, high strength, and is easy to clean. Since swimming pool handrails are installed near the water, especially in seawater swimming pools or bathhouses, the chloride ions in the water can damage the passive film on the surface of 304 stainless steel, causing the exposed metal to undergo an electrochemical reaction with chloride ions, oxygen, and water, resulting in pitting or crevice corrosion and rust. In particular, the insertion gap between the handrail pipe and the stand can easily allow seawater to seep in and stagnate, forming water accumulation and corroding the connection between the handrail pipe and the stand. At the same time, using 304 stainless steel as the base material for swimming pool handrails has certain requirements for the diameter of the round pipe, resulting in a higher cost. SUMMARY

[0004] The present application solves the above technical problems and provides a swimming pool handrail.

[0005] The technical solution of the present application is a swimming pool handrail, which includes a handrail pipe, the base material of the handrail pipe is a carbon steel round pipe or a 201 stainless steel round pipe, and a full-coating protective layer is formed on the surface of the handrail pipe through a modified polyethylene (PE) powder dipping process.

[0006] As an embodiment, the base material of the handrail pipe is selected from a carbon steel round pipe or a 201 stainless steel round pipe with an outer diameter of 30-48mm and a wall thickness of ≥1.2mm.

[0007] As an implementation, the handrail pipe comprises a vertical insertion end, the column is vertically arranged and has an upward opening, the vertical insertion end is inserted into the opening of the column, the inside of the column is provided with a water storage groove, the bottom of the water storage groove is provided with a drain port, the bottom of the handrail pipe is connected with a valve core through a valve rod, the bottom of the valve core is provided with a compression spring, the compression spring closes the drain port in an initial state, and the bottom of the valve core is further provided with a telescopic displacement sensor for detecting the stroke of the valve core.

[0008] The water storage groove is provided with a sacrificial anode, and the bottom of the flush cavity is provided with a water storage cavity located at the bottom of the column.

[0009] When the detection value of the telescopic displacement sensor is greater than a set value, the sacrificial anode is powered on, and the micro pump is started.

[0010] As an implementation, the water storage groove is in the shape of a round bucket, and the drain port is circular.

[0011] As an implementation, the water storage groove is provided with two annular clamping blocks, and the inner wall of the column is provided with two annular clamping grooves for connecting the annular clamping blocks.

[0012] As an implementation, the micro pump is located below the water storage groove, and the position of the micro pump is higher than that of the drain port.

[0013] As an implementation, the inside of the column is provided with an elastic telescopic sleeve, the fixed sleeve of the elastic telescopic sleeve is located at the bottom of the column, the movable pipe of the elastic telescopic sleeve elastically abuts against the bottom of the valve core, the sacrificial anode is fixed between the fixed sleeve and the column, the compression spring is located in the elastic telescopic sleeve, the compression direction of the compression spring is the same as the telescopic direction of the elastic telescopic sleeve, the upper end of the compression spring abuts against the valve core, the lower end of the compression spring is connected with the fixed sleeve, and the telescopic displacement sensor is located in the elastic telescopic sleeve.

[0014] As an implementation, the inner wall of the fixed sleeve is provided with positioning sliding grooves on both sides, and the outer wall of the movable pipe is provided with sliding blocks matched with the positioning sliding grooves.

[0015] As an implementation, the sacrificial anode is a magnesium alloy sacrificial anode.

[0016] As an embodiment, the handrail tube is triangular, trapezoidal, or half-hipped.

[0017] The beneficial effect of the present application compared to the prior art is that the swimming pool handrail uses a carbon steel or 201 stainless steel base pipe combined with a surface full-coating modified polyethylene (PE) powder dipping process, which significantly improves the corrosion resistance, durability, and economy of the product. It effectively solves the problem of pitting, crevice corrosion, and rust caused by the destruction of the passivation film by chloride ions in traditional 304 stainless steel handrails in chlorine-containing (especially seawater) environments, especially eliminating the corrosion hazards caused by water accumulation in the joint gaps of pipe fittings. At the same time, this scheme avoids the yellowing and aging of the surface of aluminum alloy handrails, and greatly reduces the material cost. This makes the handrail not only suitable for freshwater swimming pools / bathing areas, but also reliable for use in harsh environments such as seawater swimming pools / bathing areas, greatly expanding the product's application range and extending its service life. At the same time, since carbon steel or 201 stainless steel is used as the base material of the handrail tube, the base material itself does not need to have better corrosion resistance, so the diameter of the round tube is reduced, thereby controlling the cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structural schematic diagram of a swimming pool handrail provided by an embodiment of the present application;

[0019] Figure 2 A structural schematic diagram of another swimming pool handrail provided by an embodiment of the present application;

[0020] Figure 3 A structural schematic diagram of another swimming pool handrail provided by an embodiment of the present application;

[0021] Figure 4 A structural schematic diagram of another swimming pool handrail provided by an embodiment of the present application;

[0022] Figure 5 A first partial cross-sectional view of the connection between the handrail tube and the stand provided by an embodiment of the present application;

[0023] Figure 6 A second partial cross-sectional view of the connection between the handrail tube and the stand provided by an embodiment of the present application;

[0024] Figure 7 A partial enlarged view of the connection between the handrail tube and the stand provided in Figure 5

[0025] Figure 8 A partial enlarged view of the connection between the handrail tube and the stand provided in Figure 6

[0026] ​​In the figure: 1, handrail pipe; 2, stand; 3, vertical plug-in end; 4, water storage tank; 5, drainage outlet; 6, valve stem; 7, valve core; 8, compression spring; 9, telescopic displacement sensor; 10, flushing cavity; 11, sacrificial anode; 12, water storage cavity; 13, lower capillary tube; 14, upper capillary tube; 15, capillary annular groove; 16, micro pump; 17, annular connecting table; 18, annular clamping block; 19, annular clamping groove; 20, elastic telescopic sleeve; 21, fixed sleeve; 22, movable pipe; 23, positioning sliding groove; 24, sliding block. DETAILED DESCRIPTION

[0027] The above and other embodiments and advantages of the present application will become more apparent from the following description taken in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely part of the present application, but not all.

[0028] In an embodiment, as shown in the figure. Figures 1 to 4

[0029] The swimming pool handrail provided by the embodiment has a carbon steel round pipe or a stainless steel round pipe as the base material of the handrail pipe 1, and a full-coating protective layer is formed on the surface of the handrail pipe 1 by a modified polyethylene (PE) powder dipping process. The base material of the handrail pipe 1 is selected from a carbon steel round pipe or a stainless steel round pipe with an outer diameter of 30-48 mm and a wall thickness of ≥1.2 mm.

[0030] In the embodiment, the full-coating protective layer is formed on the surface of the handrail pipe 1 to solve the rusting and aging problems of the handrail pipe 1 in a chlorine ion environment. The outer diameter is set to 30-48 mm, which meets the ergonomic comfort of gripping according to a diameter of 45 mm, and the wall thickness ensures the structural strength.

[0031] The dipping process involves preheating at 280℃, powder dipping for 35 seconds, powder leveling, curing at 210-220℃, and cooling. Before preheating, the base material can be pretreated by impacting the surface with white corundum sand, degreasing and cleaning with an alkaline solution, rinsing with pure water, and then drying. The preheating uses an infrared radiation heating furnace, and the preheating temperature is 280±5℃, preferably 280℃, which is to make the surface of the base material reach the PE melting temperature to avoid pinholes in the coating. The preheated base material is sent to a boiling tank for powder dipping, and the boiling tank parameters are: air flow speed 0.8 m / s, powder density 0.45 g / cm 3 , and immersion time about 35 seconds, which can be adjusted according to the size of the handrail. Then, the outer tank is weakly boiled with the air flow speed reduced to 0.3 m / s. The powder-leveled base material is sent to a secondary heating furnace for heating and curing (210-220℃) for about 10 minutes, and then naturally cooled to form a full-coating dipping layer on the base material, with a thickness of at least 1 mm, to finally obtain the swimming pool handrail. The dipping layer at least includes modified polyethylene (PE).

[0032] ​The pool handrail is made of carbon steel or stainless steel base pipe combined with full-coated modified polyethylene (PE) powder dipping process, which significantly improves the corrosion resistance, durability and economy of the product. It effectively solves the problem of pitting, crevice corrosion and rust caused by the destruction of the passivation film by chloride ions in traditional 304 stainless steel handrails in chlorine-containing environments (especially seawater), especially eliminating the corrosion hazards caused by water accumulation in the joint gap of pipe fittings. At the same time, this scheme avoids the surface yellowing and aging phenomenon of aluminum alloy handrails, and greatly reduces the material cost. This makes the handrail not only suitable for freshwater pools / bathing areas, but also reliable for use in seawater pools / bathing areas and other harsh environments, greatly expanding the product's application range and extending its service life.

[0033] In an embodiment, as shown in Figures 1 to 8 .

[0034] The pool handrail provided by the embodiment includes a handrail pipe 1 and a column 2. The handrail pipe 1 includes a vertical insertion end 3. The column 2 is vertically arranged and has an upward opening. The vertical insertion end 3 is inserted into the opening of the column 2. The inside of the column 2 is provided with a water storage groove 4. The bottom of the water storage groove 4 is provided with a drain port 5. The bottom of the handrail pipe 1 is connected with a valve core 7 through a valve rod 6. The bottom of the valve core 7 is provided with a compression spring 8. In the initial state, the compression spring 8 closes the drain port 5. The bottom of the valve core 7 is also provided with a telescopic displacement sensor 9 for detecting the stroke of the valve core 7. The water storage groove 4 is provided below with a flushing cavity 10. The flushing cavity 10 is provided with a sacrificial anode 11. The flushing cavity 10 is provided below with a water storage cavity 12 located at the bottom of the column 2. The column 2 is provided with a lower capillary tube 13 connected with the water storage cavity 12 and an upper capillary tube 14 connected with the insertion gap between the vertical insertion end 3 and the column 2. The inner wall of the column 2 is provided with a capillary annular groove 15 connected with the upper capillary tube 14. The lower capillary tube 13 and the upper capillary tube 14 are connected as a whole through a micro pump 16. When the detection value of the telescopic displacement sensor 9 is greater than the set value, the sacrificial anode 11 is powered on, and the micro pump 16 is started.

[0035] In the embodiment, the pool handrail is improved for the handrail pipe 1 and the column 2 to solve the problem of corrosion of the connection between the handrail pipe 1 and the column 2 in seawater pool or bathing area. The drainage path is reconstructed so that the drainage is no longer simply discharged. Instead, it is forced to flow through the flushing cavity 10, pass through the cations dissolved by the sacrificial anode 11, generate a water flow containing protective ions, and be drained to the insertion gap between the vertical insertion end 3 and the column 2 through the micro pump 16. After the protective layer is damaged, a temporary protective film is formed on the exposed metal surface. Thus, the protective ions are directed to the gap area most susceptible to corrosion, making up for the deficiency of physical sealing, and prolonging the service life of the pool handrail.

[0036] In this embodiment, the insertion gap between the handrail tube 1 and the column 2 of the swimming pool handrail is prone to seawater penetration and accumulation, or when the air humidity in the tube is saturated, water condenses in the cold area of the tube wall and accumulates in the column 2 at a lower position, which is inevitable through physical sealing. Although the surface of the handrail tube 1 has formed a full-coating protective layer, the insertion part of the handrail tube 1 and the column 2 is prone to wear, and the protective layer at this part is easily damaged. In this embodiment, water can accumulate in the water storage tank 4. When a single or multiple swimmers grasp the handrail tube 1, the vertical downward component force causes the valve stem 6 and the valve core 7 to displace, thereby opening the drain 5. The accumulated water enters the flushing cavity 10 along the drain 5, and then enters the bottommost water storage cavity 12. When the valve core 7 is displaced and the displacement amount is sufficient to open the drain 5 (the detection value of the telescopic displacement sensor 9 is greater than the set value), the sacrificial anode 11 in the standby state is energized and activated, and the micro-pump 16 is started. Then the water flowing through the flushing cavity 10 dissolves the anode to become an alkaline water flow containing protective ions (containing Mg 2+ and OH-), which enters the water storage cavity 12. Under the power provided by the micro-pump 16, the ionic water in the water storage cavity 12 successively passes through the lower capillary tube 13 and the upper capillary tube 14, and finally enters the insertion gap (Mg 2+ and Cl- combine to form soluble MgCl2) between the vertical insertion end 3 and the column 2, reducing the opportunity for free Cl- to contact the stainless steel surface Fe 2+ . And in the anode activation stage, the cathode hydrogen evolution increases the OH- content, and in the insertion gap, Mg 2+ forms a Mg(OH)2 deposition film, thereby physically covering the pits and repairing the damaged passive film of the stainless steel. When the valve core 7 is reset, the sacrificial anode 11 and the micro-pump 16 enter the standby state again.

[0037] In this embodiment, the sacrificial anode 11 is a magnesium alloy sacrificial anode 11. As an alternative embodiment, the sacrificial anode 11 is an aluminum alloy sacrificial anode 11.

[0038] In this embodiment, the corrosion protection of the handrail tube 1 of the swimming pool handrail is achieved by a plastic dipping process.

[0039] In one embodiment, as Figures 7 to 8 shown.

[0040] The swimming pool handrail provided in this embodiment has a round-dip-shaped water storage tank 4, a circular drain 5, and a valve core 7 with a ring-shaped connecting table 17 fitted to the drain 5.

[0041] In this embodiment, the water storage tank 4 is designed in a round bucket shape, i.e. funnel shape, to achieve efficient water collection. When the user holds the handrail, the water flow brought by the arm flows into the water storage tank 4 along the handrail pipe 1, and the round bucket-shaped slope naturally guides the water flow to the center, avoiding edge water accumulation. It can also prevent impurities from staying, because the inclined side wall reduces sediment deposition and reduces the risk of blockage. The drain port 5 is designed in a circular shape, matching the annular connecting table 17 (step sealing structure) on the top of the valve core 7. After the annular connecting table 17 is attached to the edge of the drain port 5, a first mechanical seal is formed. When the valve core 7 is pressed down by water pressure, the annular connecting table 17 presses the rubber sealing ring (not shown in the figure, but actually needs to be configured) on the edge of the drain port 5, forming a second flexible seal, completely blocking the leakage, thereby forming a double seal.

[0042] In one embodiment, as shown in Figure 8 .

[0043] The swimming pool handrail provided by the embodiment has two annular clamping blocks 18 arranged on the periphery of the water storage tank 4, and two annular clamping grooves 19 are formed in the inner wall of the stand column 2, and the annular clamping groove 19 is connected with the annular clamping block 18.

[0044] In this embodiment, two annular clamping blocks 18 are arranged on the periphery of the water storage tank 4, and two annular clamping grooves 19 are formed in the inner wall of the stand column 2, which can form a bidirectional locking anti-loose structure. The upper and lower clamping blocks and clamping grooves are nested to form axial double locking, resisting the risk of loosening caused by water flow impact or artificial shaking. The annular clamping groove 19 is pre-buried with an O-shaped sealing ring, which can realize the radial sealing between the water storage tank 4 and the stand column 2 when the clamping block is embedded in the clamping groove, preventing water leakage from the gap and corroding the internal elements.

[0045] In one embodiment, as shown in Figure 8 .

[0046] The swimming pool handrail provided by the embodiment has two annular clamping blocks 18 arranged on the periphery of the water storage tank 4, and two annular clamping grooves 19 are formed in the inner wall of the stand column 2, and the annular clamping groove 19 is connected with the annular clamping block 18.

[0047] In this embodiment, the micro pump 16 is arranged in a high position to form a liquid level difference barrier. Even if the pump body is stopped, the residual water in the water storage tank 4 cannot flow back to the pump cavity due to gravity, avoiding motor immersion and short circuit.

[0048] In one embodiment, as shown in Figure 7 .

[0049] The pool handrail provided by the embodiment has an elastic telescopic sleeve 20 in the interior of the stand 2, the fixed sleeve 21 of the elastic telescopic sleeve 20 is located at the bottom of the stand 2, the movable tube 22 of the elastic telescopic sleeve 20 elastically abuts against the bottom of the valve core 7, the sacrificial anode 11 is fixed between the fixed sleeve 21 and the stand 2, the compression spring 8 is located in the elastic telescopic sleeve 20, the compression direction of the compression spring 8 is the same as the telescopic direction of the elastic telescopic sleeve 20, the upper end of the compression spring 8 abuts against the valve core 7, the lower end of the compression spring 8 is connected to the fixed sleeve 21, and the telescopic displacement sensor 9 is located in the elastic telescopic sleeve 20.

[0050] In the embodiment, the elastic telescopic sleeve 20 is composed of the bottom fixed sleeve 21 (welded with the stand 2) and the top movable tube 22 (abutting against the valve core 7). The two form a dynamic sealed cavity, the movable tube 22 and the fixed sleeve 21 are connected by a telescopic sealing sleeve, forming a closed dry cabin, which isolates the compression spring 8 and the telescopic displacement sensor 9 from the water environment, and prevents corrosion interference. And the compression spring 8 forms a double elastic support, the valve core 7 on the compression spring 8 keeps the drain 5 in a normally closed state, and when the water pressure exceeds the limit or an external force is applied, the valve core 7 moves downward to compress the compression spring 8 to realize drainage. The movable tube 22 also elastically abuts against and pre-tightens to assist the valve core 7 to reset and buffer the water flow impact vibration. The annular space between the fixed sleeve 21 and the stand 2 is filled with the magnesium / aluminum-based sacrificial anode 11 block, which is preferentially corroded and consumed to protect the iron stand 2 matrix.

[0051] In one embodiment, as shown in Figure 7 .

[0052] The pool handrail provided by the embodiment has an elastic telescopic sleeve 20 in the interior of the stand 2, the fixed sleeve 21 of the elastic telescopic sleeve 20 is located at the bottom of the stand 2, the movable tube 22 of the elastic telescopic sleeve 20 elastically abuts against the bottom of the valve core 7, the sacrificial anode 11 is fixed between the fixed sleeve 21 and the stand 2, the compression spring 8 is located in the elastic telescopic sleeve 20, the compression direction of the compression spring 8 is the same as the telescopic direction of the elastic telescopic sleeve 20, the upper end of the compression spring 8 abuts against the valve core 7, the lower end of the compression spring 8 is connected to the fixed sleeve 21, and the telescopic displacement sensor 9 is located in the elastic telescopic sleeve 20, and a humidity sensor (not shown in the figure) is arranged in the elastic telescopic sleeve 20. When the detection value of the humidity sensor is greater than a set threshold value, a miniature pump is triggered at a doubled flushing frequency, which can be 1.5-3 times of the set working frequency, the sacrificial anode 11 is electrified, and the miniature pump 16 is started.

[0053] In the present embodiment, the movable tube 22 and the fixed sleeve 21 form a closed dry cabin, which isolates the water storage tank 4 from water seepage, capillary condensate water from eroding the compression spring 8 and the telescopic displacement sensor 9. The humidity sensor in the dry cabin triggers the micro pump 16 to double the flushing frequency when it detects that the humidity is greater than the set threshold, and synchronously starts the sacrificial anode 11 to be powered on. The double-signal triggering system composed of the displacement sensor and the humidity sensor, in which the displacement sensor is given priority and the humidity sensor is backup, has the advantage of position monitoring. Because only the displacement sensor works, internal rust caused by the rise of ambient humidity is easily ignored, that is, the anti-rust logic is upgraded from passive response to active immunity.

[0054] In one embodiment, as shown in Figure 7 .

[0055] The swimming pool handrail provided by the present embodiment has positioning sliding grooves 23 formed on the inner wall of the fixed sleeve 21, and sliding blocks 24 matched with the positioning sliding grooves 23 formed on the outer wall of the movable tube 22.

[0056] In the present embodiment, vertical positioning sliding grooves 23 are symmetrically formed on the inner wall of the fixed sleeve 21, and sliding blocks 24 are correspondingly arranged on the outer wall of the movable tube 22, so as to realize anti-twist guiding. Because the sliding blocks 24 slide up and down along the sliding grooves, the movable tube 22 is forced to move only in the axial direction, avoiding the sticking or sealing wear caused by the eccentric load. Moreover, it can ensure that the measurement axis of the telescopic displacement sensor 9 (usually a linear potentiometer or a magnetic grating ruler) is consistent with the movement trajectory, thereby improving the detection accuracy of the opening degree of the valve core 7.

[0057] In one embodiment, as shown in Figures 1 to 4 .

[0058] The swimming pool handrail provided by the present embodiment has a handrail tube 1 in the shape of a special shape, a triangle, a trapezoid, or a half-hip.

[0059] In this embodiment, the handrail tube 1 is designed as a triangle as a whole, and its functional advantages are corner adaptability. Among the three edges, the bottom edge is horizontally fixed to the stand column 2, the top corner points to the outside of the pool, and the two side edges form a gripping surface, which perfectly adapts to the 90° corner area of the pool. The top corner edge provides tactile guidance, and the blind swimmer can perceive the forward direction along the edge. In addition, the water flow converges along the three edges and falls, reducing surface retention. The handrail tube 1 is designed as a triangle as a whole, and its functional advantages are straight path stability. The wide bottom edge is fully welded with the top surface of the stand column 2, which significantly improves the torsional strength and is suitable for long straight lanes. The narrow top edge (width 50-60mm) naturally fits the palm and the tiger mouth arc, and the wide bottom edge (80-100mm) disperses the support stress. The handrail tube 1 is designed as a half-waist shape as a whole, and its functional advantages are space adaptability. The compact half-ring shape (height 120-150mm) saves passage space and is suitable for narrow pool edges. The continuous arc top surface completely fits the natural curvature of the palm, reducing long-time gripping fatigue. The bottom plane is laser welded with the end surface of the stand column 2, which can form a bending section. The handrail tube 1 is designed as a special shape as a whole, which combines the advantages of the triangle and the half-waist shape, as shown in Figure 1 .

[0060] The above specific embodiments further illustrate the purposes, technical solutions, and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and does not limit the protection scope of the present application. It is particularly pointed out that any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A swimming pool handrail, comprising a handrail tube, characterized in that, The base material of the handrail tube is a carbon steel round tube or a 201 stainless steel round tube, and its surface is coated with a fully encapsulated protective layer by a modified polyethylene (PE) powder dip-coating process.

2. The pool handrail according to claim 1, characterized in that, The base material of the handrail tube is selected from carbon steel round tubes with an outer diameter of 30-48mm and a wall thickness of ≥1.2mm or 201 stainless steel round tubes.

3. The pool handrail according to claim 1, characterized in that, It also includes a column, the handrail tube includes a vertical insertion end, the column is vertically set and the opening is upward, the vertical insertion end is inserted into the opening of the column, the inside of the column is provided with a water storage tank, the bottom of the water storage tank is provided with a drain outlet, the bottom of the handrail tube is connected to a valve core through a valve stem, the bottom of the valve core is provided with a compression spring, in the initial state the compression spring causes the valve core to close the drain outlet, the bottom of the valve core is also provided with a telescopic displacement sensor for detecting the stroke of the valve core; A flushing chamber is provided below the water storage tank, and a sacrificial anode is provided inside the flushing chamber. A water storage chamber is located at the bottom of the column below the flushing chamber. A lower capillary tube connecting the water storage chamber and an upper capillary tube connecting the vertical insertion end and the insertion gap of the column are provided inside the column. A capillary annular groove connecting the upper capillary tube is provided on the inner wall of the column. The lower capillary tube and the upper capillary tube are connected as one unit by a micro pump. When the detected value of the telescopic displacement sensor is greater than the set value, the sacrificial anode is energized and the micro pump is started.

4. The pool handrail according to claim 1, characterized in that, The water storage tank is shaped like a bucket, the drain outlet is circular, and the valve core has an annular connecting platform around its periphery that fits the drain outlet.

5. The pool handrail according to claim 4, characterized in that, The water storage tank has two annular locking blocks around its perimeter, and the inner wall of the column has two annular locking grooves for the annular locking blocks to connect.

6. The pool handrail according to claim 1, characterized in that, The micropump is located below the water storage tank, and the position of the micropump is higher than the drain outlet.

7. The pool handrail according to claim 1, characterized in that, The column is equipped with an elastic telescopic sleeve inside. The fixed sleeve of the elastic telescopic sleeve is located at the bottom of the column. The movable tube of the elastic telescopic sleeve elastically abuts against the bottom of the valve core. The sacrificial anode is fixed between the fixed sleeve and the column. The compression spring is located inside the elastic telescopic sleeve. The compression direction of the compression spring is the same as the extension direction of the elastic telescopic sleeve. The upper end of the compression spring abuts against the valve core. The lower end of the compression spring is connected to the fixed sleeve. The telescopic displacement sensor is located inside the elastic telescopic sleeve.

8. The pool handrail according to claim 1, characterized in that, The inner wall of the fixed sleeve is provided with positioning grooves on both sides, and the outer wall of the movable tube is provided with sliders that cooperate with the positioning grooves on both sides.

9. The pool handrail according to claim 1, characterized in that, The sacrificial anode is a magnesium alloy sacrificial anode.

10. The pool handrail according to claim 1, characterized in that, The handrail tube is generally triangular, trapezoidal, or semi-circular.

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