Non-negative-pressure variable-frequency constant-pressure water supply device

Abstract

The utility model relates to a non-negative pressure frequency conversion constant pressure water supply device which comprises a flow inlet pipe, the output end of the flow inlet pipe is connected with a constant pressure filtering assembly capable of filtering water flow and adjustably maintaining output water pressure, and the output end of the constant pressure filtering assembly is further connected with a pressure maintaining water storage assembly connected with a water outlet pipe. A water pump which adjustably pulls a water body to flow in the pipe body and conveys the water body to the constant-pressure filtering assembly is also arranged in the pipe body of the inflow pipe; a continuous filtering mechanism is rotatably arranged in a constant-pressure filtering cavity of the constant-pressure filtering assembly, and the side wall of the constant-pressure filtering cavity is sleeved with an external cleaning mechanism for transferring filtered impurities filtered by the filtering mechanism. The water supply device can continuously filter and transfer and clean filtered impurities under the condition that equipment is not disassembled, so that the continuous filtering efficiency and the cleaning convenience are improved, and meanwhile, the working time and frequency of the water pump can be adjusted according to the water pressure change to reduce the water supply energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply equipment, in particular to a negative pressure-free variable frequency constant pressure water supply device. Background Art

[0002] The non-negative pressure water supply equipment uses the municipal pipe network as the water source, making full use of the original pressure of the municipal pipe network to form a closed continuous relay booster water supply method, with good energy-saving effect and no secondary pollution of water quality. It is the development and extension of constant pressure water supply equipment. In domestic water use, constant pressure water supply equipment is an indispensable water supply equipment for the community, which can provide tap water for daily life for the residents of the community. Through constant pressure water supply, the water pressure of the water supply can be flexibly adjusted according to the different water consumption of the residents, so that the water pressure remains constant and the waste of resources is reduced.

[0003] Although the existing non-negative pressure water supply equipment can improve the efficiency of water supply and reduce the energy consumption of water supply to a certain extent, it still has the following problems:

[0004] 1. Although the existing constant pressure water supply equipment has begun to build a filtering structure to filter water impurities, the intercepted water impurities will gradually block the filtering structure, resulting in a decrease in the water flow efficiency, which is very likely to cause fluctuations in downstream water pressure and affect the use. In addition, the continuously accumulated impurities are very likely to continue to pollute the water quality and affect the service life of the equipment. The conventional maintenance method requires shutting down and disassembling the water supply equipment to maintain the internal filter and other structures. The work is cumbersome and difficult, requiring a large time and manpower cost, and the shutdown maintenance will also affect the continuity of water supply and the convenience of residents.

[0005] 2. Existing water supply equipment usually requires the water supply pump to be in working state for a long time to ensure the water pressure. However, continuously turning on the water supply pump during low-peak usage time will cause waste. The working frequency of the water supply pump cannot be changed according to changes in water pressure. The high-frequency and long-term operation of the water supply pump will cause waste of resources, increase energy consumption, and shorten its maintenance cycle. Utility Model Content

[0006] The utility model aims to provide a non-negative pressure variable frequency constant pressure water supply device which can continuously filter and transfer and clean filtered impurities without disassembling the equipment, thereby improving the continuous filtering efficiency and cleaning convenience, and can adjust the working time and frequency of the water pump according to the water pressure change to reduce the water supply energy consumption, so as to solve the problems that the existing constant pressure water supply equipment does not have a water body filtering structure or has a built-in water body filtering structure, which is difficult and complicated to maintain, and requires shutdown for maintenance, which has a great impact on the continuity of water supply, and the existing water pump adopts a continuous water supply drive mode, which has the problems of excessive energy supply, shortened life and excessive energy consumption.

[0007] The technical solution adopted by the utility model is: a non-negative pressure variable frequency constant pressure water supply device, including an inlet pipe connected to a city water supply network, the output end of the inlet pipe is connected to a constant pressure filter assembly capable of filtering water flow and adjusting to maintain the output water pressure, the output end of the constant pressure filter assembly is also connected to a pressure-maintaining water storage assembly connected to a water outlet pipe, a water pump that can adjustably draw water to flow in its pipe body and transport it to the constant pressure filter assembly is also arranged in the pipe body of the inlet pipe; a continuous filtering mechanism is rotatably arranged in the constant pressure filter chamber of the constant pressure filter assembly, and the side wall of the constant pressure filter chamber is sleeved with an external cleaning mechanism for transferring filtered impurities filtered by the filtering mechanism.

[0008] According to a preferred embodiment, a pressure switch mechanism connected in series with the water pump is also provided at the top of the constant pressure filter chamber; the bottom of the constant pressure filter chamber is connected to the pressure maintaining water storage component through a water pipe, and a one-way valve is provided in the water pipe.

[0009] According to a preferred embodiment, an annular opening is provided on the side of the constant pressure filter chamber, and an inclined extending annular plate that can match the conical plate frame of the filter mechanism is provided at the lower edge of the annular opening.

[0010] According to a preferred embodiment, the filtering mechanism includes the conical plate frame, the fan-shaped filter screen, the transmission support shaft and the rotating motor, wherein the conical plate frame is suspended in the constant-pressure filter chamber by the transmission support shaft, and the lower edge of the conical plate frame can be movably contacted with the upper edge of the inclined extended ring plate; the fan-shaped filter screen capable of constructing a conical filtering structure is laid in the frame cavity defined by the conical plate frame; the axial lower end of the transmission support shaft away from the conical plate frame is connected to the rotating motor that drives it to rotate in a manner that penetrates the constant-pressure filter chamber.

[0011] According to a preferred embodiment, the external cleaning mechanism includes an annular cover shell, a separating ring plate, an inclined ring platform, a vertical partition ring plate, and a lifting drive component. The separating ring plate mounted on the constant pressure filter chamber is arranged inside the annular cover shell; an inclined ring platform is arranged at the bottom of the annular cover shell.

[0012] According to a preferred embodiment, the vertical partition ring plate is penetrated on the separation ring plate, and the top side of the vertical partition ring plate is connected to the lifting drive member.

[0013] According to a preferred embodiment, the radial outer side of the ring body cover is supported to form a drain port and a flushing port, and a sealing ring capable of filling the penetration gap is embedded on the plate body side ring wall of the separating ring plate that passes through the vertical partition ring plate; a silicone sealing ring sheet is laid on the slope surface of the inclined ring platform.

[0014] According to a preferred embodiment, the pressure switch mechanism includes a pressure regulating shell cavity, an elastic silicone sheet, a first circuit contact, a second circuit contact, a conductive plate and an insulating support column, wherein the pressure regulating shell cavity is embedded in the top of the constant pressure filter cavity, and the pressure regulating shell cavity is separated from the constant pressure filter cavity by the elastic silicone sheet; the first circuit contact and the second circuit contact are arranged in the pressure regulating shell cavity, and the conductive plate is suspended above the first circuit contact and the second circuit contact; the conductive plate is suspended by the insulating support column connected to the elastic silicone sheet.

[0015] According to a preferred embodiment, a pressure regulating port is also provided on the top of the pressure regulating shell cavity.

[0016] According to a preferred embodiment, a pressure-maintaining airbag is further provided at the top of the steady-flow water storage chamber of the pressure-maintaining water storage assembly, and an air inlet end of the pressure-maintaining airbag passes through the wall of the steady-flow water storage chamber and is connected to an adjustable inflation unit.

[0017] The beneficial effects of the utility model are:

[0018] The constant pressure filter assembly provided in the present application can continuously filter the water body, and can transfer the filtered impurities under the centrifugal force by rotating regularly, thereby ensuring the effect and efficiency of continuous filtering while avoiding the tediousness and difficulty of disassembling and maintaining the filter structure. The constant pressure filter assembly can continuously adjust the working state of the water pump according to the change of the water pressure in its inner cavity, so as to realize the variable frequency water delivery and ensure the constant pressure state, and improve the stability of water use. The constant pressure filter assembly can improve the continuity of water supply and the convenience of maintenance through non-disassembly maintenance and cleaning, eliminate the adverse effects of downtime maintenance, and maintain a high degree of cleanliness. The filter structure can continuously and efficiently filter the water body while avoiding the pollution of the water body by the silted impurities. The constant pressure filter assembly can use the water pressure change to control the variable frequency operation of the water pump, thereby preventing the chamber water pressure and water volume from decreasing and forming a negative pressure, and ensuring the stability of the directional flow. The variable frequency regulation of the water pump by the constant pressure filter assembly can improve the effectiveness of the water pump, reduce invalid work, thereby reducing the working time of the water pump, reducing the comprehensive energy consumption, and improving the use time of the water pump. The pressure-maintaining water storage component provided in the present application can buffer the hydraulic fluctuations that may be caused by the constant pressure filtering component, thereby always maintaining the pressure of the output water flow, and it assists in adjusting the chamber water pressure by inflation to maintain the hydraulic pressure of the output water flow constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a preferred non-negative pressure variable frequency constant pressure water supply device proposed by the utility model;

[0020] Figure 2It is a structural schematic diagram of a preferred non-negative pressure variable frequency constant pressure water supply device proposed by the utility model when the constant pressure filter chamber is separated from the lower chamber of the ring body cover;

[0021] Figure 3 It is a structural schematic diagram of a preferred non-negative pressure variable frequency constant pressure water supply device proposed by the utility model when the constant pressure filter chamber is connected with the lower chamber of the ring body cover shell;

[0022] Figure 4 This is a structural schematic diagram of a preferred non-negative pressure variable frequency constant pressure water supply device proposed by the utility model when the pressure switch mechanism is closed;

[0023] Figure 5 It is an enlarged structural schematic diagram of the A area of ​​a preferred non-negative pressure variable frequency constant pressure water supply device proposed by the utility model.

[0024] Reference numerals list

[0025] 1: inlet pipe; 2: constant pressure filter assembly; 3: pressure water storage assembly; 4: outlet pipe; 5: water pump; 21: constant pressure filter chamber; 22: filter mechanism; 23: external cleaning mechanism; 24: pressure switch mechanism; 25: water pipe; 26: one-way valve; 211: annular opening; 212: inclined extension ring plate; 221: conical plate frame; 222: fan-shaped filter screen; 223: transmission support shaft; 224: rotating motor; 231: ring body cover; 232: separation ring plate; 233: inclined ring platform ; 234: vertical partition ring plate; 235: lifting drive member; 236: discharge port; 237: flushing port; 238: sealing ring; 239: silicone sealing ring; 2311: upper chamber; 2312: lower chamber; 241: pressure regulating shell cavity; 242: elastic silicone sheet; 243: first circuit contact; 244: second circuit contact; 245: conductive plate; 246: insulating support column; 247: pressure regulating port; 31: steady flow water storage cavity; 32: pressure maintaining airbag; 33: adjustable inflation unit. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] The technical solution provided by the present invention will be described in detail below by way of embodiments with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In some examples, some implementation methods are not described or are not described in detail because they belong to existing or conventional technologies.

[0028] In addition, the technical features recorded in this article, or the steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or operation sequence of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0029] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, under reasonable circumstances (not constituting a self-contradiction), include direct and indirect connections (couplings).

[0030] The following is a detailed description with reference to the accompanying drawings.

[0031] Example 1

[0032] The present application provides a non-negative pressure variable frequency constant pressure water supply device, which includes an inlet pipe 1, a constant pressure filter component 2, a pressure maintaining water storage component 3, a water outlet pipe 4 and a water pump 5.

[0033] according to Figure 1-5A specific embodiment is shown, in which the input end of the inlet pipe 1 is connected to the city water supply network. The output end of the inlet pipe 1 is connected to a constant pressure filter assembly 2 that can filter the water flow and adjustably maintain the output water pressure. The output end of the constant pressure filter assembly 2 is also connected to a pressure-maintaining water storage assembly 3 connected to the outlet pipe 4. A water pump 5 that can adjustably draw the water body to flow in its body and be transported to the constant pressure filter assembly 2 is also provided in the pipe body of the inlet pipe 1. The constant pressure filter assembly 2 provided in the present application can continuously filter the water body, and can transfer filtered impurities under centrifugal force by rotating regularly, thereby ensuring the effect and efficiency of continuous filtration while avoiding the tediousness and difficulty of disassembling and maintaining the filter structure. The constant pressure filter assembly 2 can continuously adjust the working state of the water pump 5 according to the change of the water pressure in its inner cavity, so as to realize variable frequency water delivery and ensure a constant pressure state, thereby improving the stability of water use. The constant pressure filter assembly 2 can improve the continuity of water supply and the convenience of maintenance through non-disassembly maintenance and cleaning, eliminate the adverse effects of shutdown maintenance, and maintain a high degree of cleanliness. The filter structure can continuously and efficiently filter the water body while avoiding the pollution of the water body by silted impurities. The pressure-maintaining water storage assembly 3 provided in the present application can buffer the hydraulic fluctuations that may be caused by the constant pressure filter assembly 2, so as to always maintain the pressure of the output water flow, and it assists in adjusting the chamber water pressure by inflation to maintain the hydraulic pressure of the output water flow constant. The constant pressure filter assembly 2 can use the water pressure change to control the frequency conversion operation of the water pump 5, thereby preventing the chamber water pressure and water volume from decreasing and forming a negative pressure, and ensuring the stability of the directional flow.

[0034] Preferably, the constant pressure filter assembly 2 includes a constant pressure filter chamber 21, a continuous filter mechanism 22, an external cleaning mechanism 23, a pressure switch mechanism 24, a water pipe 25 and a one-way valve 26. Preferably, a continuous filter mechanism 22 is rotatably arranged in the constant pressure filter chamber 21. Further preferably, the side wall of the constant pressure filter chamber 21 is provided with an external cleaning mechanism 23 for transferring the filtered impurities filtered by the filter mechanism 22. Preferably, a pressure switch mechanism 24 connected in series with the water pump 5 is also provided at the top of the constant pressure filter chamber 21. The pressure switch mechanism 24 can drive the water pump 5 to work according to the water use situation during the continuous water supply process, so that the water pump 5 is adapted to the water use situation in a variable frequency operation in a manner that the working frequency and working cycle are constantly changing, thereby ensuring the water pressure while being able to stop when there is no water output to reduce energy consumption, and adjusting the current size of its electrical circuit under different water supply output conditions to make the water pump 5 work with a driving force change. Specifically, the pressure switch mechanism 24 can adjust its current size according to the actual pressure change to achieve variable frequency drive of the water pump 5. Preferably, the bottom of the constant pressure filter chamber 21 is connected to the pressure-maintaining water storage component 3 through a water pipe 25. Further preferably, a one-way valve 26 capable of limiting the one-way flow of water in the constant pressure filter chamber 21 into the pressure-maintaining water storage component 3 is provided in the water pipe 25. The continuous filtering mechanism 22 provided in the present application can continuously filter the water flowing in a direction in the constant pressure filter chamber 21, and it can rotate so that the filtered impurities can be gradually thrown into the annular cavity of the external cleaning mechanism 23 under the centrifugal force, so that the external cleaning mechanism 23 can isolate the impurities by being separated from the constant pressure filter chamber 21, and then flush and discharge them by a clean water flow. The external cleaning mechanism 23 can be arranged at the same height interval as the conical plate frame 221 to facilitate receiving the thrown impurities. The pressure switch mechanism 24 provided in the present application can adjustably close the electrical circuit according to the change of the water volume and water pressure in the constant pressure filter chamber 21, and adjust the current size of the circuit according to the change amount, so that the water pump 5 can intermittently perform variable frequency motion, thereby effectively transporting water and adjusting the water pressure in the constant pressure filter chamber 21, so as to ensure that the constant pressure filter chamber 21 can maintain a relatively stable water pressure environment for a long time. The water pipe 25 and the one-way valve 26 provided in the present application can cooperate with each other to continuously input the filtered water in the lower section of the constant pressure filter chamber 21 into the steady flow water storage chamber 31 of the pressure-maintaining water storage component 3, so as to ensure that the steady flow water storage chamber 31 of the pressure-maintaining water storage component 3 can continuously maintain the output water flow of a specific water pressure state.

[0035] Preferably, an annular opening 211 is provided on the side of the constant pressure filter chamber 21. Further preferably, an inclined extension ring plate 212 that can match the conical plate frame 221 of the filter mechanism 22 is provided at the lower edge of the annular opening 211. The inclined extension ring plate 212 provided in the present application can make the conical plate frame 221 rotate so that the impurities centrifugally thrown out along its plate surface can slide along the inclined extension ring plate 212 and into the ring body cover 231 through the annular opening 211 to achieve the transfer of impurities, thereby ensuring the smoothness of the filter mesh of the fan-shaped filter 222.

[0036] Preferably, the filter mechanism 22 comprises a conical plate frame 221, a fan-shaped filter screen 222, a transmission support shaft 223 and a rotating motor 224. Preferably, the conical plate frame 221 is suspended in the constant pressure filter chamber 21 by the transmission support shaft 223. Further preferably, the lower edge of the conical plate frame 221 can be in active contact with the upper edge of the inclined extension ring plate 212, so that the conical plate frame 221 can rotate around the axis relative to the inclined extension ring plate 212 while cooperating with the inclined extension ring plate 212 to separate the chamber space of the constant pressure filter chamber 21. Preferably, a fan-shaped filter screen 222 capable of constructing a conical filter structure is laid in the frame cavity defined by the conical plate frame 221. Preferably, the transmission support shaft 223 is connected to the rotating motor 224 that drives it to rotate in a manner that runs through the constant pressure filter chamber 21 away from the axial lower end of the conical plate frame 221. The conical filter structure constructed by the conical plate frame 221 and the fan-shaped filter screen 222 provided in the present application can be mutually bonded while intercepting impurities, and the impurities with increased volume can slide along the surface of the cone and automatically transfer to the inclined extension ring plate 212, and then transfer to the ring body cover 231. The rotating motor 224 provided in the present application is separated from the constant pressure filter chamber 21, so as to prevent the rotating motor 224 from being corroded by water vapor. The rotating motor 224 can make the conical filter structure rotate around the axis under the transmission action of the transmission support shaft 223, so that the impurities attached to the surface of the cone can generate centrifugal force during the rotation process, and then gradually fall off from the surface of the fan-shaped filter screen 222, and fall into the ring body cover 231 under the action of the rotating centrifugal force, so as to achieve the separation and transfer of impurities, thereby ensuring the smoothness of the filter structure.

[0037] Preferably, the external cleaning mechanism 23 includes an annular housing 231, a separating ring plate 232, an inclined ring platform 233, a vertical partition ring plate 234, and a lifting drive 235. Preferably, a separating ring plate 232 is provided inside the annular housing 231, which is sleeved on the constant pressure filter chamber 21, so as to separate its shell cavity into an upper chamber 2311 and a lower chamber 2312. Preferably, the annular housing 231 is sleeved on the side wall of the constant pressure filter chamber 21, and its lower ring chamber is connected to the inner cavity of the constant pressure filter chamber 21 through an annular opening 211. Further preferably, an inclined ring platform 233 is provided at the bottom of the annular housing 231, so that the impurities intercepted by the filter mechanism 22 undergo centrifugal motion and gradually enter the annular housing 231, and the impurities are accumulated along the inclined surface of the inclined ring platform 233, so as to avoid the impurities returning to the constant pressure filter chamber 21 with the water body after the centrifugal rotation force is released. Preferably, a vertical partition ring plate 234 is provided on the separation ring plate 232 to adjustably separate the shell cavity of the ring body cover 231 and the inner cavity of the constant pressure filter cavity 21. Preferably, the inner side wall and the outer side wall of the separation ring plate 232 are respectively connected to the outer wall of the constant pressure filter cavity 21 and the side wall of the ring body cover 231, so that the stability of its connection position and the effectiveness of separation are still maintained when its plate body is divided into two co-centric ring plate bodies by the vertical partition ring plate 234. Preferably, the vertical partition ring plate 234 passes through the top side of the separation ring plate 232 and is connected to a lifting drive member 235 supported on the inner top surface of the ring body cover 231. Preferably, the lifting drive member 235 is arranged at intervals in the circumference and synchronously drives the vertical partition ring plate 234 to move up and down according to demand, so as to adjustably connect or separate the shell cavity of the ring body cover 231 and the inner cavity of the constant pressure filter cavity 21. Preferably, the radial outer side of the ring body cover 231 is symmetrically provided with a discharge port 236 and a flushing port 237. Specifically, the discharge port 236 can be used for the discharge of impurities, and the flushing port 237 arranged in opposition thereto can input flushing water into the ring body cover 231 by means of an external water pipe to flush and clean the impurities accumulated in the ring body cover 231, so that the flushing sewage containing impurities is discharged from the discharge port 236, thereby realizing the discharge of impurities separated and filtered by the filter mechanism 22 after being transferred and accumulated in the ring body cover 231. Preferably, a sealing ring 238 capable of filling the penetration gap is inlaid on the plate side ring wall of the separating ring plate 232 through which the vertical partition ring plate 234 is penetrated. Preferably, a silicone sealing ring sheet 239 is laid on the slope surface of the inclined ring platform 233, so that the descending vertical partition ring plate 234 can ensure the sealing of the partition by abutting against the silicone sealing ring sheet 239.

[0038] Preferably, the pressure switch mechanism 24 includes a pressure regulating shell 241, an elastic silicone sheet 242, a first circuit contact 243, a second circuit contact 244, a conductive plate 245 and an insulating support column 246. Preferably, the pressure regulating shell 241 is embedded in the top of the constant pressure filter chamber 21. Preferably, the pressure regulating shell 241 is separated from the constant pressure filter chamber 21 by the elastic silicone sheet 242. Preferably, the first circuit contact 243 and the second circuit contact 244 are aligned and penetrated in the pressure regulating shell 241, and a conductive plate 245 is suspended above the first circuit contact 243 and the second circuit contact 244. Preferably, the conductive plate 245 is suspended and supported by an insulating support column 246 connected to the elastic silicone sheet 242. Further preferably, the conductive plate 245 is connected in series with a sliding rheostat mounted on the inner top surface of the pressure regulating shell cavity 241, and the conductive plate 245 is connected to the moving end of the sliding rheostat, so that when the conductive plate 245 descends, the moving end of the sliding rheostat is pulled to translate and reduce the resistance of the electric circuit, thereby increasing the circuit current, so as to increase the driving voltage of the water pump 5, so as to gradually increase the driving force of the water pump 5. Preferably, a pressure regulating port 247 is also provided at the top of the pressure regulating shell cavity 241, so as to connect the air pressure regulating device to the pressure regulating port 247 according to demand, so as to adjust the air pressure of the inner cavity of the pressure regulating shell cavity 241 according to demand, thereby ensuring that the air pressure of the pressure regulating shell cavity 241 can be kept equal to the hydraulic pressure of the inner cavity of the constant pressure filter cavity 21.

[0039] Preferably, a pressure-maintaining airbag 32 is also provided at the top of the steady-flow water storage chamber 31 of the pressure-maintaining water storage assembly 3. Further preferably, the air inlet end of the pressure-maintaining airbag 32 penetrates the wall of the steady-flow water storage chamber 31 and is connected to the adjustable inflation unit 33. A pressure sensor is provided on the outer wall of the pressure-maintaining airbag 32 provided in the present application, so that it can monitor the real-time pressure of the water body in the steady-flow water storage chamber 31, so that when the pressure changes, the inflation unit 33 is controlled by the control chip to inflate or deflate to change the size of the pressure-maintaining airbag 32 to adjust the hydraulic pressure of the water body.

[0040] The working principle of this application is:

[0041] Water is continuously delivered to the constant pressure filter chamber 21 through the water pump 5 until the water pressure in the inner cavity reaches the set value. Gas is input into the pressure regulating shell chamber 241 through the pressure regulating port 247 so that the air pressure of the chamber can maintain a roughly equal balance with the hydraulic pressure of the constant pressure filter chamber 21. At this time, the elastic silicone sheet 242 is in a flat state without convexity or concaveness, and the conductive plate 245 is not in contact with the first circuit contact 243 and the second circuit contact 244. When the water in the constant pressure filter chamber 21 decreases and the water pressure decreases, the elastic silicone sheet 242 becomes concave and the conductive plate 245 is in contact with the first circuit contact 243 and the second circuit contact 244, thereby closing the electric circuit to drive the water pump 5 to start working, and changing the resistance value of the electric circuit according to the degree of concaveness, so that the water pump 5 is driven with different powers under different current states to achieve intermittent variable frequency operation. When the conical filter structure formed by the conical plate frame 221 and the fan-shaped filter net 222 intercepts a certain amount of impurities and is blocked, resulting in a weakened filtering effect, the impurities intercepted by the conical filter structure are allowed to enter the annular cover 231 under the centrifugal force by rotating the conical filter structure, thereby completing the cleaning and transfer of the impurities. Specifically, the annular cover 231 of the external cleaning mechanism 23 is initially connected to the constant pressure filter chamber 21 to continuously collect impurities. After the conical filter structure is rotated and cleaned, the annular cover 231 and the constant pressure filter chamber 21 are separated by adjusting the position of the vertical partition ring plate 234, so that the annular cover 231 can be connected to the external connection to clean and discharge the impurities inside the constant pressure filter chamber 21 while the constant pressure filter chamber 21 continues to complete water transportation and filtration. The rotary cleaning operation of the present application can be performed in the state of shutting down and emptying the water in the constant pressure filter chamber 21 to avoid secondary pollution to the water body. And the impurities can be quickly transferred under high-speed rotation, thereby improving maintenance efficiency and reducing water transportation time, especially when there is water in the pressure-maintaining water storage component 3, it can continue to output water flow at pressure when the constant-pressure filter chamber 21 is emptied, thereby achieving continuous constant-pressure water supply for the equipment to a certain extent. The water pump 5 of the present application can be provided with a backup electrical circuit, so as to be driven at a fixed frequency during the initial irrigation period. The constant-pressure filter chamber 21 provided in the present application can be provided with an exhaust port to facilitate the exhaust of the gas compressed during the irrigation process inside it.

[0042] The present utility model is not limited to the above optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope of the claims of the present utility model fall within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute limitations on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A non-negative pressure variable frequency constant pressure water supply device, comprising an inlet pipe (1) connected to a city water supply and water delivery network, characterized in that: The output end of the inlet pipe (1) is connected to a constant pressure filter assembly (2) capable of filtering water flow and adjusting to maintain the output water pressure; the output end of the constant pressure filter assembly (2) is also connected to a pressure-maintaining water storage assembly (3) connected to a water outlet pipe (4); and a water pump (5) is also provided in the pipe body of the inlet pipe (1) for adjusting to draw water to flow in the pipe body and transport the water to the constant pressure filter assembly (2); A continuous filtering mechanism (22) is rotatably arranged in the constant pressure filtering chamber (21) of the constant pressure filtering assembly (2), and an external cleaning mechanism (23) for transferring filtered impurities filtered by the filtering mechanism (22) is sleeved on the side wall of the constant pressure filtering chamber (21).

2. The non-negative pressure variable frequency constant pressure water supply device according to claim 1, characterized in that: The top of the constant pressure filter chamber (21) is also provided with a pressure switch mechanism (24) connected in series with the water pump (5); The bottom of the constant pressure filter chamber (21) is connected to the pressure-maintaining water storage component (3) via a water delivery pipe (25), and a one-way valve (26) is provided in the water delivery pipe (25).

3. The non-negative pressure variable frequency constant pressure water supply device according to claim 2, characterized in that: An annular opening (211) is provided on the side of the constant pressure filter chamber (21), and an inclined extending ring plate (212) capable of matching with the conical plate frame (221) of the filter mechanism (22) is provided on the lower edge of the annular opening (211).

4. The non-negative pressure variable frequency constant pressure water supply device according to claim 3, characterized in that: The filtering mechanism (22) comprises the conical plate frame (221), a fan-shaped filtering screen (222), a transmission support shaft (223) and a rotating motor (224), wherein: The conical plate frame (221) is suspended in the constant pressure filter chamber (21) via the transmission support shaft (223), and the lower edge of the conical plate frame (221) is capable of movably contacting the upper edge of the inclined extension ring plate (212); The fan-shaped filter screen (222) capable of constructing a conical filter structure is laid in the frame cavity defined by the conical plate frame (221); The axial lower end of the transmission support shaft (223) away from the conical plate frame (221) is connected to the rotating motor (224) that drives it to rotate in a manner that penetrates the constant pressure filter cavity (21).

5. The non-negative pressure variable frequency constant pressure water supply device according to claim 4, characterized in that: The external cleaning mechanism (23) comprises a ring body cover (231), a partition ring plate (232), an inclined ring platform (233), a vertical partition ring plate (234), and a lifting drive member (235). The ring body casing (231) is provided with the separating ring plate (232) sleeved on the constant pressure filter cavity (21) inside; An inclined ring platform (233) is provided at the bottom of the ring body cover (231).

6. The non-negative pressure variable frequency constant pressure water supply device according to claim 5, characterized in that: The vertical partition ring plate (234) is provided on the partition ring plate (232), and the top side of the vertical partition ring plate (234) is connected to the lifting drive member (235).

7. The non-negative pressure variable frequency constant pressure water supply device according to claim 6, characterized in that: The annular housing (231) is symmetrically provided with a discharge port (236) and a flushing port (237) on the radial outer side. The separating ring plate (232) penetrates the vertical partition ring plate (234), and a sealing ring (238) capable of filling the penetration gap is embedded on the side ring wall of the plate body; A silicone seal ring sheet (239) is laid on the slope surface of the inclined ring platform (233).

8. The non-negative pressure variable frequency constant pressure water supply device according to claim 7, characterized in that: The pressure switch mechanism (24) comprises a pressure regulating housing (241), an elastic silicone sheet (242), a first circuit contact (243), a second circuit contact (244), a conductive plate (245) and an insulating support column (246), wherein: The pressure regulating shell cavity (241) is embedded in the top of the constant pressure filter cavity (21), and the pressure regulating shell cavity (241) is separated from the constant pressure filter cavity (21) by the elastic silicone sheet (242); The first circuit contact (243) and the second circuit contact (244) are arranged in alignment in the voltage regulating housing cavity (241), and the conductive plate (245) is suspended above the first circuit contact (243) and the second circuit contact (244); The conductive plate (245) is suspended and supported by the insulating support column (246) connected to the elastic silicone sheet (242).

9. The non-negative pressure variable frequency constant pressure water supply device according to claim 8, characterized in that: A pressure regulating port (247) is also provided at the top of the pressure regulating shell cavity (241).

10. The non-negative pressure variable frequency constant pressure water supply device according to claim 9, characterized in that: A pressure-maintaining airbag (32) is also provided at the top of the steady-flow water storage chamber (31) of the pressure-maintaining water storage component (3), and an air inlet end of the pressure-maintaining airbag (32) penetrates the wall of the steady-flow water storage chamber (31) and is connected to an adjustable inflation unit (33).

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