Valve head structure for controlling backwashing and pollution discharge at top and pre-filter

Abstract

The utility model relates to a valve head structure capable of controlling backwashing and pollution discharge at the top and a prefilter, which comprise a controller, a valve head body with a water inlet port, a water outlet port and a filter bottle matching port, a driving motor component, a control component, a transmission component, a pollution discharge switching component and a backwashing component, the driving motor assembly comprises a driving motor, the driving motor is fixed to the valve head body, and the valve head body is provided with an assembling cavity matched with the output end of the driving motor. The control assembly comprises a first limiting switch; the transmission assembly comprises a transmission shaft, the transmission shaft is connected with the output end of the driving motor and is in running fit with the assembling cavity, the pollution discharge switching assembly is arranged at the end of the transmission shaft, and the transmission shaft can axially move under the action of the driving motor. The valve head is more optimized in structure, convenient to install, use and maintain, compact in structure and high in automation degree and reliability, and backwashing, pollution discharge and / or water leakage protection valve closing actions are controlled through one motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve head structure and prefilter of top control backwash and pollution discharge belong to water purification equipment technical field. BACKGROUND

[0002] The prefilter in prior art includes: valve head, filter bottle connected with valve head on upper end, drainage assembly connected with lower end of filter bottle, filter screen skeleton is arranged in filter bottle, filter screen skeleton is sleeved with filter screen on outer wall. In the process of using, water flows into the gap between filter bottle and filter screen from the water inlet of valve head, flows into the center of filter screen skeleton after filtering by filter screen, and then flows to the water outlet of valve head from the center of filter screen skeleton.

[0003] In the process of using prefilter, the impurities attached to the surface of filter screen need to be cleaned in situ at irregular intervals, and then discharged through drainage assembly, and the efficient operation of cleaning / scraping structure is very important, in prior art, there are cleaning / scraping structure driven by motor, cleaning / scraping structure driven by impeller, and backwash is also an efficient means for cleaning of filter screen of prefilter, but the cleaning / scraping structure in prior art is not controlled by a driving motor arranged on the top of valve head, and the mode switching of normal filtering and backwash is realized, in addition, the full-automatic cleaning and pollution discharge of prefilter is also the development trend of this kind of product in the future, furthermore, it is inevitable that there will be water leakage in the process of using prefilter, when water leakage is found, it is very important to close the water inlet channel and water outlet channel of prefilter in time, the technical personnel in the field discusses the driving motor arranged on the top of valve head, realizes the valve closing (that is, closing the water inlet channel and water outlet channel at the same time) when water leakage occurs, the utility model solves the technical problems mentioned above, and provides a valve head structure and prefilter of top control backwash and pollution discharge, which are more optimized in structure and easy to realize industrialization. SUMMARY

[0004] One of the purposes of the utility model is to solve the deficiencies of the prefilter in prior art, and provide a valve head structure of top control backwash and pollution discharge. The valve head structure is more optimized, convenient to install, use and maintain, backwash, pollution discharge and / or water leakage protection closing valve action are controlled by one motor, the structure is compact, and the degree of automation and reliability are high.

[0005] The second purpose of the utility model is to solve the deficiencies of the prefilter in prior art, and provide a prefilter of top control backwash and pollution discharge, which adopts the valve head structure mentioned above. The prefilter has the functions of automatically switching backwash, pollution discharge and recovery filtering mode, and / or integrates the function of closing valve protection when water leakage occurs, that is, the water channel can be closed under the condition of water leakage.

[0006] The technical scheme adopted by the utility model to solve the technical problems is:

[0007] The valve head structure for controlling backflushing and blowdown comprises a controller, a valve head body with an inlet port, an outlet port and a filter bottle assembly port, a drive motor assembly, a control assembly, a transmission assembly, a blowdown switching assembly and a backflushing assembly.

[0008] The drive motor assembly comprises a drive motor fixed to the valve head body, and the valve head body is provided with an assembly cavity adapted to the output end of the drive motor.

[0009] The control assembly comprises a first limit switch.

[0010] The transmission assembly comprises a transmission shaft coupled to the output end of the drive motor and rotationally fitted to the assembly cavity, and the blowdown switching assembly is arranged at the end of the transmission shaft, and the transmission shaft can move axially under the action of the drive motor.

[0011] The blowdown switching assembly comprises a blowdown plug, which comprises a connecting part and a functional part, and the connecting part and / or the functional part is provided with a blowdown gap, the connecting part is connected to the transmission part, the functional part is provided with at least a first sealing element, and the blowdown plug can open or close the blowdown channel through the blowdown gap under the drive of the drive motor assembly.

[0012] The backflushing assembly comprises a backflushing skeleton, a backflushing filter screen and a sealing part, the backflushing assembly is sleeved on the transmission shaft and can move axially with the transmission shaft under the drive of the drive motor assembly, moves from an initial position to a first limit switch position, the sealing part can close the water inlet channel of the pre-filter filter mechanism, and the backflushing water channel of the backflushing filter screen is opened at the same time, and the blowdown plug opens the blowdown channel; moving back to the initial position, the water inlet channel of the pre-filter filter mechanism is opened, and the backflushing water channel of the backflushing filter screen is closed at the same time, and the blowdown plug closes the blowdown channel.

[0013] The initial position is the position of the pre-filter in the filtering state, and the drive motor and the first limit switch are electrically connected to the controller.

[0014] Preferably, the control assembly further comprises a second limit switch located below the first limit switch, the sealing part is provided with a first sealing part and a second sealing part, and the backflushing filter screen is arranged between the first sealing part and the second sealing part, the first sealing part closes the water inlet channel of the pre-filter filter mechanism when the first limit switch is in the first limit switch position; the second sealing part closes the water inlet of the water inlet port and the water outlet of the water outlet port when the drive motor drives the transmission shaft to continue running to the second limit switch position, thereby achieving valve closing, and the second limit switch is electrically connected to the controller.

[0015] Preferably, the passage of the water inlet port of the valve head body is further provided with a flow sensor electrically connected with the controller, the flow sensor transmits flow data to the controller, when the flow data exceeds the set value, the controller sends a valve closing instruction to the drive motor; after troubleshooting, the controller sends an opening valve instruction to the drive motor after receiving an external instruction;

[0016] Or manually send a valve closing instruction to the controller, cancel the valve closing instruction, and the controller responds to send a running instruction to the drive motor;

[0017] The flow sensor includes a Hall flow sensor, an electromagnetic flow sensor, a vortex flow sensor, a vane flow sensor, and an ultrasonic flow sensor.

[0018] Preferably, the diameter of the connecting part is smaller than that of the functional part, and the gap between the outer periphery of the connecting part and the blowdown cavity constitutes a blowdown gap, and the control assembly further includes an initial position limit switch arranged at the initial position and electrically connected with the controller to achieve precise reset. The first limit switch, the second limit switch, and the initial limit switch are selected from any one or several of photoelectric induction switches, Hall switches, and micro switches.

[0019] Preferably, the transmission shaft includes a rotating shaft and a transmission rod, the rotating shaft is provided with external threads, the assembly cavity is provided with internal threads, the rotating shaft is detachably connected with the transmission rod, and the drive motor output shaft of the drive motor is detachably connected with the rotating shaft.

[0020] Preferably, the rotating shaft is sleeved with the transmission rod, and is provided with a snap spring assembly opening for fixation, the end of the rotating shaft is provided with a special-shaped hole or a special-shaped part, the end of the drive motor output shaft is provided with a matching special-shaped part or a special-shaped hole, and the special-shaped hole and the special-shaped part are connected by matching.

[0021] Preferably, the drive motor assembly further includes a drive motor fixing seat, the top of the drive motor fixing seat is provided with a drive motor assembly groove, the drive motor is clamped in the drive motor assembly groove, and the side surface of the drive motor fixing seat is provided with a limit switch mounting groove, and the first limit switch, the second limit switch, and the initial limit switch are fixed in the limit switch mounting groove.

[0022] Preferably, the drive shaft and the transmission rod are respectively provided with limit parts, and the two ends of the backwashing skeleton abut against the limit parts of the drive shaft and the transmission rod, respectively.

[0023] Preferably, the first sealing element is an O-shaped sealing ring, the functional part of the blowdown plug body is provided with a sealing element assembly groove, the first sealing element is fixed in the sealing element assembly groove, and the connecting part is further provided with a blowdown flow guide groove.

[0024] A pre-filter, comprising a valve head, a filter bottle, a filter mechanism arranged in the filter bottle, and a blowdown cavity at the bottom of the filter bottle, the valve head is a valve head structure capable of controlling backwashing and blowdown at the top, a backwashing assembly of the valve head structure is coaxially arranged in the filter mechanism and can move up and down relative to the filter mechanism, a function part of a blowdown plug body is matched with the blowdown cavity and can close the blowdown cavity, and a connecting part can open the blowdown cavity.

[0025] The pre-filter has the advantages that:

[0026] The valve head structure is more optimized, convenient to install, use and maintain, backwashing, blowdown and / or water leakage protection valve closing actions are controlled by one motor, the structure is compact, and the degree of automation and reliability are high.

[0027] The pre-filter has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view of the pre-filter of the utility model;

[0029] Figure 2 is a structural schematic view of the pre-filter of the utility model;

[0030] Figure 3 is a structural schematic view of the pre-filter of the utility model;

[0031] Figure 4 is a structural schematic view of the pre-filter of the utility model (filtering state);

[0032] Figure 5 is a structural schematic view of the pre-filter of the utility model (backwashing and blowdown state);

[0033] Figure 6 is a structural schematic view of the pre-filter of the utility model (valve closing state).

[0034] In the drawing: 1. valve head body, 2. driving motor, 31. connecting part, 32. function part, 33. first sealing element, 4. backwashing framework, 51. first sealing part, 52. second sealing part, 6. backwashing filter screen, 7. rotating shaft, 8. transmission rod, 9. limit switch mounting groove, 10. filter framework, 11. water inlet channel of filter mechanism, 12. filter element, 13. filter element adjusting part, 14. filter bottle. DETAILED DESCRIPTION

[0035] The technical scheme of the utility model will be further specifically explained below by means of specific embodiments and in combination with the drawings.

[0036] As Figures 1-6As shown, the top control backwash and blowdown valve head structure comprises a controller (not shown in the figure), a valve head body 1 with an inlet port, an outlet port and a filter bottle assembly port, a drive motor assembly, a control assembly, a transmission assembly, a blowdown switching assembly and a backwash assembly;

[0037] The drive motor assembly comprises a drive motor 2 fixed with the valve head body 1, and the valve head body 1 is provided with an assembly cavity adapted to the output end of the drive motor 2;

[0038] The control assembly comprises a first limit switch;

[0039] The transmission assembly comprises a transmission shaft comprising a drive part and a transmission part, the drive part is coupled with the output end of the drive motor 2 and rotationally matched with the assembly cavity, and the blowdown switching assembly is arranged on the transmission part;

[0040] The blowdown switching assembly comprises a blowdown plug, the blowdown plug comprises a connecting part 31 and a functional part 32, the diameter of the connecting part 31 is smaller than that of the functional part 32, forming a blowdown gap, the connecting part 31 is connected with the transmission part, the functional part is provided with at least a first sealing element 33, and the blowdown plug can open or close the blowdown channel through the blowdown gap under the drive of the drive motor assembly;

[0041] The backwash assembly comprises a backwash skeleton 4, a backwash filter screen 6 and a sealing part, the backwash assembly is sleeved on the transmission shaft and can move axially with the transmission shaft under the drive of the drive motor assembly, moving from an initial position to a first limit switch position, the sealing part can close the water inlet channel of the pre-filter filter mechanism, and the backwash water channel of the backwash filter screen 6 is opened at the same time, and the blowdown plug opens the blowdown channel; moving upward to recover to the initial position, the water inlet channel of the pre-filter filter mechanism is opened, and the backwash water channel of the backwash filter screen 6 is closed at the same time, and the blowdown plug closes the blowdown channel;

[0042] The initial position is the position of the pre-filter in the filtering state, and the drive motor 2 and the first limit switch are electrically connected with the controller.

[0043] In the embodiment, the control assembly further comprises a second limit switch located below the first limit switch, the sealing part is provided with a first sealing part 1 and a second sealing part 2, and the backwash filter screen 6 is arranged between the first sealing part 1 and the second sealing part 2, the first sealing part 1 closes the water inlet channel of the pre-filter filter mechanism when the first limit switch position; the second sealing part 2 closes the inner inlet of the water inlet port and the inner outlet of the water outlet port when the drive motor 2 drives the transmission shaft to continue to run to the second limit switch position, thereby achieving valve closing, and the second limit switch is electrically connected with the controller.

[0044] In the embodiment, the passage of the water inlet port of the valve head body 1 is also provided with a flow sensor electrically connected with the controller, the flow sensor transmits flow data to the controller, when the flow data exceeds the set value, the controller sends a valve closing instruction to the drive motor; after troubleshooting, the controller sends a valve opening instruction to the drive motor after receiving an external instruction; or sends a valve closing instruction, a valve canceling instruction to the controller in a manual manner, and the controller sends a running instruction to the drive motor in response.

[0045] The flow sensor includes a Hall flow sensor, an electromagnetic flow sensor, a vortex flow sensor, a vane flow sensor and an ultrasonic flow sensor.

[0046] In the embodiment, the control assembly further comprises an initial position limiting switch arranged at an initial position and electrically connected with the controller to realize accurate resetting, and the first limiting switch, the second limiting switch and the initial limiting switch are selected from any one or several of photoelectric induction switches, Hall switches and micro switches.

[0047] In the embodiment, the transmission shaft comprises a rotating shaft 7 and a transmission rod 8, the rotating shaft 7 is provided with external threads, the assembly cavity is provided with internal threads, the rotating shaft 7 is detachably connected with the transmission rod 8, and the drive motor output shaft of the drive motor 2 is detachably connected with the rotating shaft 7.

[0048] In the embodiment, the rotating shaft 7 and the transmission rod 8 are sleeved and provided with a snap spring assembly opening, and are fixed through a snap spring, the end of the rotating shaft 7 is provided with a special-shaped hole or a special-shaped part, the end of the drive motor output shaft is provided with a matched special-shaped part or a special-shaped hole, and the special-shaped hole and the special-shaped part are connected through cooperation.

[0049] In the embodiment, the drive motor assembly further comprises a drive motor fixing seat, the top of the drive motor fixing seat is provided with a drive motor assembly groove, the drive motor is clamped in the drive motor assembly groove, and the side surface of the drive motor fixing seat is provided with a limiting switch mounting groove, and the first limiting switch, the second limiting switch and the initial limiting switch are fixed in the limiting switch mounting groove.

[0050] In the embodiment, the drive shaft 7 and the transmission rod 8 are respectively provided with limiting parts, and the two ends of the backwashing framework 4 abut against the limiting parts of the drive shaft 7 and the transmission rod 8 respectively.

[0051] In the embodiment, the first sealing element 33 is an O-shaped sealing ring, the functional part 32 of the blowdown plug body is provided with a sealing element assembly groove, the first sealing element 33 is fixed in the sealing element assembly groove, and the connecting part 31 is further provided with a blowdown flow guide groove.

[0052] A pre-filter, comprising a valve head, a filter bottle 14, a filter framework 10 arranged in the filter bottle and a blowdown cavity at the bottom of the filter bottle 14, the valve head is a valve head structure for controlling backwashing and blowdown at the top, the backwashing component of the valve head structure is coaxially arranged in the filter mechanism 10 and can move up and down, the function part 32 of the blowdown plug body is matched with the blowdown cavity and can close the blowdown cavity, the connecting part 31 can open the blowdown cavity, the filter framework 10 is provided with a filter mechanism water inlet channel 11, the filter 10 is provided with a filter element 12, the filter element is a laminated filter element and is provided with a filter element adjusting part 13.

[0053] The utility model has the advantages of:

[0054] The valve head structure is more optimized, convenient to install, use and maintain, backwashing, blowdown and / or leakage protection valve closing action are controlled by one motor, the structure is compact, the automation degree and reliability are high.

[0055] The pre-filter has the functions of automatically switching backwashing, blowdown and recovery of the filter mode and / or integrating the leakage valve closing protection function, that is, the water path can be closed in the leakage state.

[0056] The above-mentioned embodiment is only a preferred scheme of the utility model and does not limit the utility model in any form, and other variants and modifications can be made without exceeding the technical scheme recorded in the claims. For example, the controller can be instructed to close the valve and cancel the valve closing by a manual mode, and the controller sends an operation instruction to the driving motor 1 after responding.

Claims

1. A valve head structure for top control backwash and blowdown, comprising a controller, a valve head body (1) with an inlet port, an outlet port and a filter bottle assembly port, characterized in that: Further comprising a driving motor assembly, a control assembly, a transmission assembly, a blowdown switching assembly and a backwashing assembly; The driving motor assembly comprises a driving motor (2), which is fixed to the valve head body (1) and provided with an assembly cavity adapted to the output end of the driving motor (2); The control assembly comprises a first limit switch; The transmission assembly comprises a transmission shaft, which is coupled to the output end of the driving motor (2) and rotationally matched with the assembly cavity, and the blowdown switching assembly is arranged at the end of the transmission shaft, and the transmission shaft can move axially under the action of the driving motor (2); The blowdown switching assembly comprises a blowdown plug body, which comprises a connecting part (31) and a functional part (32), the connecting part (31) and / or the functional part (32) are provided with a blowdown gap, the connecting part (31) is connected with the transmission part, the functional part (32) is provided with at least a first sealing element (33), and the blowdown plug body can open or close the blowdown channel through the blowdown gap under the driving of the driving motor assembly; The backwashing assembly comprises a backwashing framework (4), a backwashing filter screen (6) and a sealing part, the backwashing assembly is sleeved on the transmission shaft and can move axially with the transmission shaft under the driving of the driving motor assembly, moves from an initial position to a first limit switch position, the sealing part can close the water inlet channel of the pre-filter filtering mechanism, and the backwashing water channel of the backwashing filter screen (6) is opened at the same time, and the blowdown plug body opens the blowdown channel; The movement is restored to the initial position, the water inlet channel of the pre-filter filtering mechanism is opened, and the backwashing water channel of the backwashing filter screen (6) is closed at the same time, and the blowdown plug body closes the blowdown channel; The initial position is the position of the pre-filter in the filtering state, and the driving motor (2) and the first limit switch are electrically connected with the controller.

2. The top control backwash and blowdown valve trim structure according to claim 1, wherein: The control assembly further comprises a second limit switch located below the first limit switch, the sealing part is provided with a first sealing part (51) and a second sealing part (52), the backwashing filter screen (6) is arranged between the first sealing part (51) and the second sealing part (52), the first sealing part (51) closes the water inlet channel of the pre-filter filtering mechanism when the first limit switch position, the second sealing part (52) closes the water inlet of the water inlet port and the water outlet of the water outlet port when the driving motor (2) drives the transmission shaft to continue to run to the second limit switch position, so as to realize the valve closing, and the second limit switch is electrically connected with the controller.

3. The top control backwash and blowdown valve trim structure according to claim 1 or 2, characterized in that: The channel of the water inlet port of the valve head body (1) is further provided with a flow sensor electrically connected with the controller, the flow sensor transmits flow data to the controller, when the flow data exceeds the set value, the controller sends a valve closing instruction to the driving motor (2); after troubleshooting, the controller sends an opening valve instruction to the driving motor (2) after receiving an external instruction; Or send a valve closing instruction, cancel the valve closing instruction to the controller in a manual manner, and the controller sends a running instruction to the driving motor (2) in response; The flow sensor comprises a Hall type flow sensor, an electromagnetic flow sensor, a vortex flow sensor, a vane type flow sensor and an ultrasonic flow sensor.

4. The top control backwash and blowdown valve trim structure according to claim 1 or 2 or 3, characterized in that: The diameter of the connecting part (31) is smaller than the diameter of the functional part (32), the gap between the outer periphery of the connecting part (31) and the blowdown cavity constitutes a blowdown gap, and the control assembly further comprises an initial position limiting switch arranged at an initial position and electrically connected to the controller to realize accurate resetting.

5. The top control backwash and blowdown valve trim structure according to claim 1 or 2 or 3, characterized in that: The transmission shaft comprises a rotating shaft (7) and a transmission rod (8), the rotating shaft (7) is provided with external threads, the assembly cavity is provided with internal threads, and the rotating shaft (7) is detachably connected with the transmission rod (8).

6. The top control backwash and blowdown valve trim structure according to claim 5, wherein: The rotating shaft (7) is sleeved with the transmission rod (8) and is provided with a snap spring assembly opening and is fixed by a snap spring, the end of the rotating shaft (7) is provided with a special-shaped hole or a special-shaped part, the end of the driving motor output shaft is provided with a matching special-shaped part or a special-shaped hole, and the special-shaped hole and the special-shaped part are connected in a matching mode.

7. The top control backwash and blowdown valve trim structure according to claim 1 or 2 or 3, characterized in that: The driving motor assembly further comprises a driving motor fixing seat, the top of the driving motor fixing seat is provided with a driving motor assembly groove, the driving motor (2) is clamped in the driving motor assembly groove, and the side surface of the driving motor fixing seat is provided with a limiting switch mounting groove (9), and the first limiting switch, the second limiting switch and the initial limiting switch are fixed in the limiting switch mounting groove (9).

8. The top control backwash and blowdown valve trim structure according to claim 5, wherein: The rotating shaft (7) and the transmission rod (8) are respectively provided with limiting parts, and the two ends of the backwashing skeleton (4) respectively abut against the limiting parts of the rotating shaft (7) and the transmission rod (8).

9. The top control backwash and blowdown valve trim structure according to claim 1 or 2 or 3, characterized in that: The first sealing element (33) is an O-shaped sealing ring, the functional part (32) of the blowdown plug body is provided with a sealing element assembly groove, the first sealing element (33) is fixed in the sealing element assembly groove, and the connecting part (31) is further provided with a blowdown flow guide groove.

10. A pre-filter comprising a valve head, a filter bottle, a filtering mechanism arranged in the filter bottle, and a blowdown chamber at the bottom of the filter bottle, characterized in that: The valve head is the valve head structure for controlling backwashing and blowdown at the top according to any one of claims 1-9, the backwashing assembly of the valve head structure is coaxially arranged in the filtering mechanism and can move up and down, the functional part (32) of the blowdown plug body is matched with the blowdown cavity and can close the blowdown cavity, and the connecting part (31) can open the blowdown cavity.

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