CN216155669U - Reclaimed water replenishing port residual chlorine content monitoring and filtering device - Google Patents

Abstract

The utility model discloses a device for monitoring and filtering the residual chlorine content of a reclaimed water replenishing port, which comprises a filtering unit, a monitoring unit and a gas supply unit, wherein the filtering unit is axially inserted and fixed in a drain pipe of the reclaimed water replenishing port; the filtering unit comprises a cylindrical shell, cambered surface inclined plates and an aeration cavity, wherein the inner part of the cylindrical shell is parallelly and obliquely fixedly connected with a plurality of perforated cambered surface inclined plates at intervals, and the inner wall of the lower part of the cylindrical shell is axially and fixedly provided with the aeration cavity communicated with the air supply unit and the inner cavity of the cylindrical shell; the cambered surface swash plate is divided into a plurality of inclined filter chambers with the inner chamber of cylindricality casing, and the filter intracavity part is filled and is filtered the granule. The device can be convenient meet with the pipeline, adopts aeration and absorption dual means filtration water residual chlorine, avoids appearing the moisturizing mouth and blocks up the condition and is fit for the regeneration water factory and use.

Description

Reclaimed water replenishing port residual chlorine content monitoring and filtering device

Technical Field

The utility model relates to the technical field of water treatment, in particular to a reclaimed water replenishing port residual chlorine content monitoring and filtering device.

Background

The chlorine disinfection method has the advantages of simple operation and use, low cost, mature process, good disinfection effect persistence and easy determination of residual chlorine concentration, and is always the most economic, effective and widely applied water body disinfection method since the advent of chlorine disinfection. In general, the content of total chlorine and free residual chlorine is detected at the outlet of a clean water tank by a regeneration water plant, and if the content is lower than the effluent standard, chlorine is supplemented afterwards; if the residual chlorine content at the tail end of the pipe network is more than or equal to 0.2mg/L, the chlorine adding amount is reduced.

However, in actual circumstances, the quality of the reclaimed water is complicated, the fluctuation of the contents of the respective components inside is large, and the nature of the reclaimed water varies widely depending on the kinds of substances that react with chlorine in the water. In order to ensure that the initial chlorine adding amount of a water plant can generate enough residual chlorine concentration after contacting for a certain time and maintain the disinfection effect, the chlorine amount pre-added when entering a pipe network is often higher, and even the water outlet of a water replenishing port at the tail end of the pipe network is higher than the effluent standard of reclaimed water.

However, the excessive residual chlorine is obviously harmful to human bodies and the natural world, and the necessity of reducing the residual chlorine emission mainly comprises the following points:

1. the residual chlorine content of the water discharged from a water replenishing port at the tail end of the pipe network is higher than the regenerated water discharging standard, and the residual chlorine content can cause damage to organisms in the water body after entering the natural water body and is removed according to the standard regulation;

2. after entering the water body in nature, residual chlorine can react with substances in the water to generate a large amount of chlorination disinfection byproducts, such as trihalomethane, haloacetic acid and the like, which have a great relationship with the cancer mortality of human beings, so that the residual chlorine is necessary to be eliminated before entering the water body;

3. at present, no targeted facility equipment and a proper method are available in the market to solve the problem of high residual chlorine at the water outlet and water replenishing port of a reclaimed water plant.

Through public search, the following related patents are found:

CN204434340U discloses a contact disinfection pond goes out water chlorine residue controlling means, including setting up the chlorine residue sensor in contact disinfection pond exit, chlorine residue sensor links to each other with four play water chlorine residue controlling means input altogether that set up on delivery port outer wall and control ditch outer wall respectively, and every play water chlorine residue controlling means's control end links to each other with the gate that corresponds respectively. When the device works, the residual chlorine sensor collects the residual chlorine content at the outlet of the contact disinfection tank, transmits the collected data to the effluent residual chlorine control device, and selectively opens a gate on the wall of a control water channel to prolong the retention time of sewage in the tank if the residual chlorine is greater than a preset value; if the residual chlorine is slightly less than or equal to the preset value, the gate at the water outlet is opened to enable the sewage to flow out; and if the residual chlorine is far lower than the preset value, controlling a chlorine adding device at the water outlet to carry out chlorination treatment, and ensuring a proper amount of residual chlorine in the water outlet pipeline. The utility model discloses a can slow down the influence of the surplus chlorine of play water to receiving the water, have long service life, advantage that the practicality is strong.

Through the analysis, the residual chlorine control device in the above-mentioned patent publication all has great difference with this application in residual chlorine detects filterable structure and function, therefore does not influence the novelty of this application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the existing method and provide a device for monitoring and filtering the residual chlorine content of a reclaimed water replenishing port, which is designed aiming at the reclaimed water outlet water replenishing port, can be conveniently connected with a pipeline, adopts dual means of aeration and adsorption to filter the residual chlorine in the water body, avoids the loss of a water head in the pipeline as far as possible, avoids the blockage of the water replenishing port and is suitable for being widely used by reclaimed water plants.

A reclaimed water replenishing port residual chlorine content monitoring and filtering device comprises a filtering unit, a monitoring unit and a gas supply unit, wherein the filtering unit is axially inserted and fixed in a drainage pipe of a reclaimed water replenishing port, the two ends of the filtering unit are fixedly provided with the monitoring unit, and one end of the filtering unit is communicated with the gas supply unit; the filtering unit comprises a cylindrical shell, cambered surface inclined plates and an aeration cavity, wherein the inner part of the cylindrical shell is parallelly and obliquely fixedly connected with a plurality of perforated cambered surface inclined plates at intervals, and the inner wall of the lower part of the cylindrical shell is axially and fixedly provided with the aeration cavity communicated with the air supply unit and the inner cavity of the cylindrical shell; the cambered surface swash plate divides the inner cavity of the cylindrical shell into a plurality of inclined filter cavities, and filter particles which are powered by water flow, aeration and gravity and limited by the cambered surface swash plate and the inner wall of the cylindrical shell are filled in the filter cavities locally.

The aeration cavity comprises an air chamber, air distribution chambers and a breathable rubber film, wherein the air chamber is of a semi-cylindrical structure, the air chamber axially extends and covers the lower half inner cavity of the integral cylindrical shell, the circumferential outer wall of the air chamber is fixedly connected with the circumferential inner wall of the lower part of the cylindrical shell, the circumferential inner wall of the air chamber is provided with a plurality of air distribution chambers in a distributed and communicated manner, and the breathable rubber film is compositely bonded on the inner cambered surface formed by the air distribution chambers; the air distribution chamber is communicated with the one-way air in the filter cavity through the breathable rubber membrane.

And the cambered surface swash plate inclines to set firmly inside the cylindricality casing, and the top of this cambered surface swash plate is close to the end of intaking of cylindricality casing, and the bottom of cambered surface swash plate is close to the drainage end of cylindricality casing, and the concave cambered surface of cambered surface swash plate is towards the end of intaking of cylindricality casing, and pierces through on the arcwall face of cambered surface swash plate and makes a plurality of rhombus sieve meshes.

And the filter particles comprise calcium sulfite particles and activated carbon particles, and the calcium sulfite particles and the activated carbon particles are alternately filled in two adjacent filter cavities respectively.

The air supply unit comprises a compressor and an air storage tank which are communicated, wherein a pipeline at the exhaust end of the compressor is communicated with the air storage tank, and a pressure gauge is arranged on the pipeline; the exhaust end pipeline of the gas storage tank is communicated with one end of the gas chamber in the aeration cavity, and the pipeline is provided with an electromagnetic valve.

The monitoring unit comprises a probe protection shell, a residual chlorine monitoring probe and a data storage and transmission module, wherein the probe protection shell is fixedly arranged on the inner walls of the two ends of the cylindrical shell in the radial direction; the residual chlorine monitoring probe is electrically connected with the data storage and transmission module.

Furthermore, a plurality of internal-supporting snap rings are coaxially and fixedly connected inside the drain pipe of the reclaimed water replenishing port; the outer snap ring that has the spacing cylindricality casing of multichannel and interior stay snap ring cooperation axial is fixed to the grafting on the circumference outer wall of cylindricality casing.

The utility model has the advantages and technical effects that:

the residual chlorine content monitoring and filtering device for the reclaimed water replenishing port is designed aiming at the reclaimed water replenishing port, can be conveniently connected with a pipeline, does not reduce the loss of a water head in the pipeline as much as possible, and avoids the blockage of the replenishing port; calcium sulfite particles and activated carbon particles can be alternately added, and the filling particles can be replaced, so that the effect is stable, the operation is simple, and the maintenance is convenient; the aeration turbulence technology, the chemical absorption technology and the particle adsorption technology are combined to mutually improve and promote and enhance the residual chlorine filtering effect; the inclined filter cavity structure has the advantages that the contact area of bottom aeration bubbles and filled particles is larger at the first point, larger buoyancy is provided for the filled particles, and the filled particles move violently and are better contacted with residual chlorine in a water body by combining the impact force of water flow; secondly, when the chlorine remover does not work, the filled particles are prevented from being completely paved on the inner wall of the cylindrical shell or the cambered surface inclined plate, so that a water head is lost, and the pipeline is prevented from being blocked; the residual chlorine monitoring probe has a real-time feedback function, can know the residual chlorine content of inlet and outlet water of the chlorine remover in real time, and is quick and efficient.

Drawings

FIG. 1 is a schematic connection diagram of the present invention;

FIG. 2 is a side view of a cylindrical housing of the present invention;

FIG. 3 is a cross-sectional view of a cylindrical housing of the present invention;

FIG. 4 is a cross-sectional view of a monitoring unit of the present invention;

FIG. 5 is a schematic structural view of the inner supporting snap ring of the present invention;

FIG. 6 is a schematic view of a partial structure of the cambered surface sloping plate of the present invention;

FIG. 7 is a schematic diagram of the system connection of the monitoring unit of the present invention;

in the figure: 1-a cylindrical housing; 2-a filter chamber; 3-cambered surface sloping plate; 4-calcium sulfite particles; 5-activated carbon particles; 6-electromagnetic valve; 7-a gas storage tank; 8-a pressure gauge; 9-a compressor; 10-an exposure cavity; 11-an external snap ring; 12-a monitoring unit; 13-breathable rubber membranes; 14-internal stay snap ring; 15-a data storage and transmission module; 16-residual chlorine monitoring probe; 17-probe containment vessel; 18-air distribution chamber; 19-air chamber; 20-diamond mesh.

Detailed Description

For a further understanding of the contents, features and effects of the present invention, reference will now be made to the following examples, which are to be considered in conjunction with the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the utility model should not be limited thereby.

A reclaimed water replenishing port residual chlorine content monitoring and filtering device comprises a filtering unit, a monitoring unit 12 and a gas supply unit, wherein the filtering unit is axially inserted and fixed in a drainage pipe of a reclaimed water replenishing port, the two ends of the filtering unit are fixedly provided with the monitoring unit, and one end of the filtering unit is communicated with the gas supply unit; the filtering unit comprises a cylindrical shell 1, cambered surface inclined plates 3 and an aeration cavity 10, wherein a plurality of perforated cambered surface inclined plates are fixedly connected in parallel at intervals in an inclined manner in the cylindrical shell, and the aeration cavity communicated with the gas supply unit and the inner cavity of the cylindrical shell is axially and fixedly arranged on the inner wall of the lower part of the cylindrical shell; the cambered surface swash plate divides the inner cavity of the cylindrical shell into a plurality of inclined filter cavities 2, and filter particles which are powered by water flow, aeration and gravity and limited by the cambered surface swash plate and the inner wall of the cylindrical shell are filled in the filter cavities locally.

Moreover, the aeration cavity comprises an air chamber 19, an air distribution chamber 18 and a breathable rubber film 13, wherein the air chamber is of a semi-cylindrical structure, the air chamber axially extends and covers the lower half-circumference inner cavity of the integral cylindrical shell, the circumferential outer wall of the air chamber is fixedly connected with the circumferential inner wall of the lower part of the cylindrical shell, a plurality of air distribution chambers are distributed and communicated on the circumferential inner wall of the air chamber, and the breathable rubber film is compositely bonded on the inner cambered surface formed by the air distribution chambers; the air distribution chamber is communicated with the one-way air in the filter cavity through the breathable rubber membrane.

Moreover, the cambered surface swash plate slope sets firmly in the cylindricality casing inside, and the top of this cambered surface swash plate is close to the end of intaking of cylindricality casing, and the bottom of cambered surface swash plate is close to the drainage end of cylindricality casing, and the concave cambered surface of cambered surface swash plate is towards the end of intaking of cylindricality casing, and pierces through on the arcwall face of cambered surface swash plate and makes a plurality of rhombus sieve meshes 20.

Moreover, the filter particles comprise calcium sulfite particles 4 and activated carbon particles 5, which are alternately filled in two adjacent filter cavities, respectively.

The air supply unit comprises a compressor 9 and an air storage tank 7 which are communicated, wherein the air discharge end pipeline of the compressor is communicated with the air storage tank, and a pressure gauge 8 is arranged on the pipeline; the exhaust end pipeline of the gas storage tank is communicated with one end of the gas chamber in the aeration cavity, and the pipeline is provided with an electromagnetic valve 6.

The monitoring unit comprises a probe protective shell 17, a residual chlorine monitoring probe 16 and a data storage and transmission module 15, wherein the probe protective shell is fixedly arranged on the inner walls of the two ends of the cylindrical shell in the radial direction, the residual chlorine monitoring probe is fixedly arranged in the probe protective shell, the data storage and transmission module is fixedly arranged at the top of the probe protective shell, and the inner cavity of the probe protective shell is communicated with the inner cavity of the cylindrical shell; the residual chlorine monitoring probe is electrically connected with the data storage and transmission module.

Furthermore, a plurality of inner supporting snap rings 14 are coaxially and fixedly connected inside the drainage pipe of the reclaimed water replenishing port; the outer snap ring 11 that has fixed the cohesion of multichannel and interior propping snap ring cooperation axial spacing cylindricality casing on the circumference outer wall of cylindricality casing.

To more clearly describe the specific embodiments of the present application, an example is provided below:

the utility model relates to a reclaimed water replenishing port residual chlorine content monitoring and filtering device, wherein a cylindrical shell is made of concrete, stainless steel, rigid plastic and other materials capable of bearing the equivalent pressure of the water passing amount of a pipeline, the cylindrical shell can be directly and fixedly clamped in the reclaimed water pipeline in the axial direction, and the matched pipe diameter is selected. A plurality of obliquely arranged filter cavities are separated from the interior of the cylindrical shell by an arc surface inclined plate, calcium sulfite particles and activated carbon particles are filled in the filter cavities, and reciprocating power is provided by the calcium sulfite particles and the activated carbon particles through air bubbles discharged from the aeration cavity at the bottom, water flow in a regenerated water pipeline and gravity. And can make bottom aeration bubble longer with pack the particulate matter contact time, area of contact is bigger, for packing the particulate matter and providing bigger buoyancy, combine the impact force of rivers for pack the violent motion of particulate matter, better and the contact of residual chlorine in the water.

In addition, the utility model preferably sets the posture of the cambered surface sloping plate as follows: (1) the cambered surface inclined plate can be provided with a corresponding radian according to actual application water conservancy conditions; (2) holes on the cambered surface inclined plate are arranged into rhombic sieve holes, so that the holes are not easily blocked by filled particles; (3) the arcwall face orientation that the cambered surface swash plate set up is shown as figure 6, and cambered surface swash plate face axis is the small-angle contact with the rivers direction, and the particulate matter of packing is difficult for adhering to or the card is in the cambered surface swash plate hole under the effect of rivers and aeration, avoids crossing the water section and blocks up.

The front filler serves as a cleaning ball of the cambered surface inclined plate, impact force can be generated on the rear cambered surface inclined plate during violent movement, the position where the sieve pores are blocked by the rear filler is impacted, and the sieve pores are kept smooth as far as possible.

The frame surface of the cambered surface sloping plate is made of smooth stainless steel and can not be hung by particles, and the water passing section sieve pores of the cambered surface sloping plate are made of high-elasticity alloy spring steel to form apertures, so that the cambered surface sloping plate has certain plasticity, toughness and corrosion resistance, and has stable elasticity for a long time. The relative elastic force and vibration amplitude of the alloy spring steel sieve holes are larger than those of common sieve holes, the size of the hole diameter can be controlled to change within a certain range, and the dynamic cambered surface inclined plate can effectively prevent the sieve holes from being blocked;

in addition, the calcium sulfite particles can well neutralize C1 in the water body₂The calcium sulfite particles can reduce C1 by generating chemical reaction₂：

CaSO₃+Cl₂+H₂O＝CaSO₄+2HCl

The activated carbon particles are porous, have strong adsorption capacity and can adsorb CL in water₂And Cl attached to other micro particles_-、ClO_-And HOCl and the like, and the activated carbon particles can also adsorb calcium sulfate precipitate generated by the reaction of the calcium sulfite particles and chlorine;

on the other hand, chlorine is added in the chlorination disinfection method to generate Cl_-、ClO_-The process of materials such as HOCl is reversible:

when calcium sulfite particles and activated carbon particles are in pair Cl₂During the elimination, the reaction proceeds spontaneously to form Cl₂Thereby promoting the calcium sulfite particles and the activated carbon particles to further react with Cl₂Eliminating, accelerating the reaction efficiency and improving the dechlorination effect.

In addition, the utility model is preferable that the residual chlorine monitoring probe is a constant-potential ampere-counting three-electrode sensor, and when the residual chlorine penetrates through the membrane device and enters the electrolyte, a potential difference is generated, so that the residual chlorine concentration in the water body is measured and monitored; the probe protective shell can effectively counteract the impact of water flow on the probe, resist the impact of particles possibly carried in a water body, provide a relatively stable monitoring environment for the probe and improve the monitoring precision of the probe; the data storage and emission module main body IS composed of a single chip microcomputer, the single chip microcomputer comprises a 64-bit quad-core microprocessor BROADCOM BCM2837, a GPRS signal uploading module and an internal memory module IC with the model of IS62WV51216BLL-55TLIC, data monitored by the residual chlorine probe IS stored in the internal memory IC, and the data IS uploaded to an upper computer through the GPRS signal uploading module in real time.

In addition, the utility model is preferable that the compressor compresses air into the air storage tank through the air filter, when the pressure reaches the set pressure, the compressor stops working, and when the pressure is less than the set pressure, the compressor starts working; gas in the gas storage tank enters the gas conveying pipe through the electromagnetic valve, the gas enters the gas distribution chamber respectively after entering the gas chamber, the gas can be uniformly distributed, the pressure of the gas is rapidly reduced after the gas penetrates through the breathable rubber membrane to form superfine microporous bubbles, the microporous bubbles quickly float upwards to disturb the water body, the calcium sulfite particles and the active carbon particles are driven to move, and the gas in the bubbles can be used for removing Cl in the water body₂Carried out of the water body, and on the other hand, can promote the calcium sulfite particles, the active carbon particles and Cl in the water body₂Fully contacts with the chlorine residue to achieve the aim of eliminating the residual chlorine.

In addition, in the actual filtering process of the utility model:

calcium sulfite particles and activated carbon particles are alternately filled into the chute, and at the moment, the filled particles are flatly laid on the inner wall of the pipeline; when the current residual chlorine monitoring probe monitors that the content L1 of the residual chlorine in the incoming water is higher than a set upper limit value LM (L1)>LM), data storage value memory IC, and upload the module to the host computer with data through GPRS signal in real time, the treater sends out the instruction to the solenoid valve, the solenoid valve switches on, gas in the gas holder gets into the gas-supply pipe, gas gets into the gas distribution chamber respectively after getting into the gas chamber, can be with gaseous evenly distributed, gas reduces rapidly after permeating the rubber membrane that pressure forms superfine micropore bubble, quick come-up, the disturbance water, and drive calcium sulfite granule and active carbon particle motion, gas in the bubble can be with the Cl in the water on the one hand₂Carried out of the water body, and on the other hand, can promote the calcium sulfite particles, the active carbon particles and Cl in the water body₂Fully contacts with the chlorine residue to achieve the aim of eliminating the residual chlorine.

When the rear residual chlorine monitoring probe monitors that the content L2 of the residual chlorine in the water is lower than a set standard value LN (L2< LN), a data storage value is stored in a memory IC, the data are uploaded to an upper computer through a GPRS signal uploading module in real time, the processor sends an instruction to the electromagnetic valve, the electromagnetic valve is stopped, and the gas in the gas storage tank stops entering the gas chamber.

After stopping the aeration, partly fill the impact motion of particulate matter still along with rivers, another part becomes the tiling on the chute by original tiling on bottom pipeline inner wall, avoids appearing the condition of bundle heap gathering in the bottom on the one hand, and on the other hand enlarges particulate matter and rivers vertical cross section's area of contact as far as possible. The packed particles can be replaced after a period of use.

The dechlorination process of the cycle stage changes along with the change of the water quality of the water body, and can well aim at the conditions of complex water quality and high volatility of the reclaimed water.

Finally, the utility model adopts the mature product and the mature method means in the existing method.

It will be understood that modifications and variations are possible to those skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the purview of the appended claims.

Claims (7)

1. The utility model provides a surplus chlorine content monitoring filter equipment in regeneration water moisturizing mouth which characterized in that: the device comprises a filtering unit, a monitoring unit and an air supply unit, wherein the filtering unit is axially inserted and fixed in a drain pipe of a reclaimed water replenishing port, the monitoring unit is fixedly arranged at two ends of the filtering unit, and one end of the filtering unit is communicated with the air supply unit; the filtering unit comprises a cylindrical shell, cambered surface inclined plates and an aeration cavity, wherein the cylindrical shell is internally provided with a plurality of perforated cambered surface inclined plates which are parallelly arranged at intervals and fixedly connected in an inclined manner, and the inner wall of the lower part of the cylindrical shell is axially and fixedly provided with the aeration cavity communicated with the air supply unit and the inner cavity of the cylindrical shell; the cambered surface swash plate divides the inner cavity of the cylindrical shell into a plurality of inclined filter cavities, and filter particles which are powered by water flow, aeration and gravity and limited by the cambered surface swash plate and the inner wall of the cylindrical shell are locally filled in the filter cavities.

2. The reclaimed water replenishing port residual chlorine content monitoring and filtering device as claimed in claim 1, wherein: the aeration cavity comprises an air chamber, air distribution chambers and a breathable rubber film, wherein the air chamber is of a semi-cylindrical structure, the air chamber axially extends and covers the lower half inner cavity of the integral cylindrical shell, the circumferential outer wall of the air chamber is fixedly connected with the circumferential inner wall of the lower part of the cylindrical shell, a plurality of air distribution chambers are distributed and communicated on the circumferential inner wall of the air chamber, and the breathable rubber film is compositely bonded on the inner cambered surface formed by the air distribution chambers; the air distribution chamber is communicated with one-way air in the filter cavity through the breathable rubber membrane.

3. The reclaimed water replenishing port residual chlorine content monitoring and filtering device as claimed in claim 1, wherein: the cambered surface swash plate inclines to set firmly inside the cylindricality casing, and the top of this cambered surface swash plate is close to the end of intaking of cylindricality casing, and the bottom of cambered surface swash plate is close to the drainage end of cylindricality casing, and the concave cambered surface of cambered surface swash plate is towards the end of intaking of cylindricality casing, and pierces through on the arcwall face of cambered surface swash plate and makes a plurality of rhombus sieve meshes.

4. The reclaimed water replenishing port residual chlorine content monitoring and filtering device as claimed in claim 1, wherein: the filter particles comprise calcium sulfite particles and activated carbon particles, and the calcium sulfite particles and the activated carbon particles are alternately filled in two adjacent filter cavities respectively.

5. The reclaimed water replenishing port residual chlorine content monitoring and filtering device as claimed in claim 1, wherein: the air supply unit comprises a compressor and an air storage tank which are communicated, wherein a pipeline at the exhaust end of the compressor is communicated with the air storage tank, and a pressure gauge is arranged on the pipeline; and an exhaust end pipeline of the gas storage tank is communicated with one end of the gas chamber in the aeration cavity, and an electromagnetic valve is arranged on the pipeline.

6. The reclaimed water replenishing port residual chlorine content monitoring and filtering device as claimed in claim 1, wherein: the monitoring unit comprises a probe protection shell, a residual chlorine monitoring probe and a data storage and transmission module, wherein the probe protection shell is fixedly arranged on the inner walls of two ends of the cylindrical shell in the radial direction; and the residual chlorine monitoring probe is electrically connected with the data storage and transmission module.

7. The reclaimed water replenishing port residual chlorine content monitoring and filtering device as claimed in claim 1, wherein: a plurality of inner supporting snap rings are coaxially and fixedly connected inside the drainage pipe of the reclaimed water replenishing port; the fixed grafting has the outer snap ring of multichannel and the spacing cylindricality casing of internal stay snap ring cooperation axial on the circumference outer wall of cylindricality casing.

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