A filter element quick-change structure and quick-change device

Abstract

The present invention provides a filter element quick-change structure and a quick-change device, which belong to the technical field of water purification equipment and are used to realize the rapid and automatic replacement of the filter element. In the prior art, the filter element is generally rod-shaped, connected in series to the water pipe as a whole, and replaced regularly according to the use of the filter element. However, since both ends of the filter element must be inserted into the water pipe, the length of the filter element is longer than the gap in the water pipe, which makes it inconvenient to replace the filter element, the operation is cumbersome, and it is not conducive to automatic replacement. The present invention provides a filter element quick-change structure and a quick-change device, wherein the filter element quick-change structure includes an inlet end, a filter element and an outlet end, the inlet end includes an outlet pipe, a valve and a quick-change joint, the quick-change joint is installed at the end of the outlet pipe, the quick-change joint includes a connecting seat and a connecting head, the connecting head is retractable, and space is left when shrinking to facilitate the filter element to be placed in the gap section of the water pipe. After the filter element is placed, the connecting head automatically extends and connects to the filter element interface, making the filter element replacement more convenient, and can also cooperate with the quick-change device to realize automatic replacement of the filter element.

Description

Technical Field

[0001] The invention belongs to the technical field of water purification equipment, and in particular relates to a filter element quick-change structure and a quick-change device. Background Art

[0002] In the prior art, the purification of drinking water and industrial water often uses membrane separation method driven by pressure difference. Membrane separation method is a general term for methods that use special filter membranes to selectively permeate certain components in liquids. For example, ultrafiltration membranes can efficiently intercept particulate matter, colloids, macromolecular organic matter, and microorganisms such as bacteria in water, with a virus interception rate of up to 99.99%. Another example is nanofiltration membranes, whose pore size is more than one order of magnitude lower than that of ultrafiltration membranes, and can effectively intercept divalent ions and dissolved organic matter in water.

[0003] In the process of filtering impurities with the filter membrane, impurities will accumulate on the surface of the filter membrane. As the filtering process proceeds, the impurities on the surface of the filter membrane will gradually increase, which will cause the filter membrane to be blocked and the water filtering capacity to decrease. Therefore, in the prior art, the filter membrane is generally set in a rod-shaped housing, with water inlet at one end and water outlet at the other end, and the filter membrane is inside, and the whole is combined into a filter element, and then the filter element is connected in series to the water pipe, and replaced according to the blockage of the filter membrane in the filter element. However, since the filter element adopts a connection method of connecting the water pipe with joints at both ends, the length of the filter element must exceed the distance between the water inlet pipe and the water outlet pipe in order to install both ends of the filter element into the water pipe, resulting in the inconvenience of replacing the filter element, the operation is cumbersome, and it is not convenient to replace the filter element automatically.

[0004] In addition, in water purification equipment, multiple filter elements are generally provided, and the filter elements may be connected in parallel or in series. The impurity conditions of the water source are also different, so the wear progress of each filter element is also very different. In the prior art, manual regular replacement is generally used for equipment maintenance. This method will result in the filter element whose service life has been exhausted not being replaced in time, and the filter element that has not reached the end of its service life by the replacement date will be replaced in advance, which not only reduces the performance of the water purification equipment, but also increases the operating cost. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a filter element quick-change structure and a quick-change device to solve the problems that the filter element replacement of the water purification equipment in the prior art is inconvenient, the operation is cumbersome, and it is not conducive to automatic replacement of the filter element.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a filter element quick-change structure and a quick-change device.

[0007] Among them, a filter element quick-change structure includes a water inlet end, a filter element and a water outlet end, a filter membrane is arranged inside the filter element, and interfaces are arranged at both ends of the filter element, and the two interfaces are respectively connected to the water outlet end and the water inlet end;

[0008] The water inlet end includes a water outlet pipe, a solenoid switch valve, a two-position three-way reversing valve and a quick-change joint, the solenoid switch valve is installed on the water outlet pipe, and the quick-change joint is installed at the end of the water outlet pipe;

[0009] The quick-change connector includes a connecting seat, a connecting head and a first elastic member, the inner diameter of the connecting seat is fixedly connected to the water outlet pipe, the connecting seat body is a cavity structure, the inner diameter of the connecting head is slidably and sealedly connected to the water outlet pipe, the end of the connecting head facing the connecting seat is the tail end, the tail end of the connecting head is provided with a connecting rod, the connecting rod passes through the end surface of the connecting seat and is inserted into the cavity of the connecting seat, the end of the connecting rod is provided with a sealing sheet, the sealing sheet is slidably matched with the side wall of the cavity of the connecting seat and is sealed, and the first elastic member is arranged between the connecting seat and the connecting head;

[0010] The two-position three-way reversing valve includes a pressure injection channel and a pressure relief channel, the two channels can be switched, and only one channel is connected at the same time, one end of the pressure injection channel is connected to the water outlet pipe, and the other end is connected to the cavity of the connecting seat, and one end of the pressure relief channel is suspended, and the other end is also connected to the cavity of the connecting seat;

[0011] The water outlet end comprises a drain pipe, and the interface of the filter element is inserted into the drain pipe.

[0012] Optionally, a limiting ring is provided on the interface of the filter element;

[0013] The connector body is also a cavity structure, and a plurality of locking mechanisms are arranged in an annular manner inside the connector, and the locking mechanisms include a steel ring, a locking claw, a second elastic member and a bladder bag;

[0014] The steel ring is arranged around the inner side of the cavity at the rear end of the connector, the locking claw is approximately in the shape of an inverted "7", and the locking claw includes a longer first straight section and a shorter second straight section, the end of the first straight section is rotatably connected to the steel ring, and the end of the second straight section is hooked on the limiting ring;

[0015] One end of the second elastic member is connected to the first straight section, and the other end is connected to the wall of the connector cavity and pulls the locking claw away from the limiting ring;

[0016] The bladder is arranged at the rear part of the second straight section, and the bladder is connected to a pressurized water pipe. When the bladder is pressurized to a bulging state, the bladder prevents the locking claw from detaching from the limiting ring.

[0017] Optionally, the pressurized water pipe is connected to any one of the injection channel and the cavity of the connecting seat;

[0018] The bladder bag is an elastic wall bladder bag, and the pressure used to prop up the bladder bag and push the locking claw to hook the limiting ring is greater than the pressure pushing the connecting head to slide in the cavity of the connecting seat.

[0019] Optionally, a locking control valve is provided on the pressurized water pipe, and the pressurized water pipe is connected to any one of the water outlet pipe or the injection channel and the cavity of the connecting seat.

[0020] Optionally, the first elastic member is sleeved on the connecting rod.

[0021] Optionally, the interface includes a guide block, an annular groove and a sealing ring;

[0022] The guide block is an oblique angle structure, and the guide block is arranged at the end of the interface;

[0023] The annular groove is arranged between the guide block and the limiting ring, and the sealing ring is arranged in the annular groove.

[0024] Optionally, one end of the sealing ring is aligned with the limiting ring, a gap is left between the other end of the sealing ring and the end of the guide block, and a recessed area is provided at this end of the sealing ring.

[0025] Among them, a filter element quick-change device comprises a lifting part and a clamping part, wherein the clamping part is installed above the lifting part, and the lifting part can move up and down with the clamping part;

[0026] Also includes the filter element quick-change structure as described above;

[0027] The clamping part includes a clamping frame, a clamping belt and a power source. A "U"-shaped clamping area is provided inside the clamping frame. Two clamping belts are arranged on both sides of the clamping area. The two clamping belts are connected to the power source through a synchronous driving mechanism, and the clamping surfaces of the two clamping belts move in the same direction and at the same speed.

[0028] The water inlet end of the filter element quick-change structure is located at the upper side of the clamping area, and the water outlet end is located at the lower side of the clamping area. The filter element is installed between the water inlet end and the water outlet end, and the outer periphery of the filter element is in contact with the clamping area.

[0029] Optionally, the synchronous drive mechanism includes a gear pair and a plurality of supporting rollers;

[0030] The two groups of support rollers respectively support the two clamping belts, one of the gears of the gear pair is connected to the power source to obtain power, and the two gear shafts of the gear pair are respectively connected to one of the roller shafts of the two groups of support rollers to obtain power.

[0031] Optionally, the lifting part includes at least one vertically arranged hydraulic cylinder, the clamping part is installed on the output shaft of the hydraulic cylinder, and the hydraulic cylinder uses a high-pressure water source at a water inlet end as a hydraulic source.

[0032] As described above, a filter element quick-change structure and quick-change device of the present invention have at least the following beneficial effects:

[0033] The filter element is easy to replace and can be replaced automatically. The present invention provides a filter element quick-change structure and a quick-change device, wherein the filter element quick-change structure includes a water inlet end, a filter element and a water outlet end, and the two ends of the filter element are interfaces. The water inlet end includes a water outlet pipe, an electromagnetic switch valve, a two-position three-way reversing valve and a quick-change joint. The electromagnetic switch valve is installed on the water outlet pipe, and the water source can be cut off when the filter element is replaced. The quick-change joint is installed at the end of the water outlet pipe. The quick-change joint includes a connecting seat, a connecting head and a first elastic member. The connecting head can be extended and retracted relative to the connecting seat. When it shrinks, space is left to facilitate placing the filter element between the water inlet pipe and the water outlet pipe. After the filter element is placed in, the connecting head automatically extends and connects to the filter element interface. The filter element quick-change structure makes the filter element easy to replace and can be used in conjunction with the quick-change device to realize automatic replacement of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Shown is an overall schematic diagram of the filter element quick-change structure of the present invention.

[0035] Figure 2 Shown is a schematic diagram of the water inlet end of the present invention.

[0036] Figure 3 Shown is a partial cross-sectional schematic diagram of the water inlet end of the present invention.

[0037] Figure 4 Shown is a schematic diagram of the liquid flow path at the water inlet end of the present invention.

[0038] Figure 5 Shown is a schematic diagram of the interface of the filter element of the present invention.

[0039] Figure 6 Shown is a schematic cross-sectional view of the connector of the present invention.

[0040] Figure 7 Shown as the present invention Figure 6 A partial enlarged schematic diagram in the middle.

[0041] Figure 8 Shown is an overall schematic diagram of the filter element quick-change device of the present invention.

[0042] Fig. 9 Shown is a schematic diagram of the clamping portion of the present invention.

[0043] Fig.10 Shown is a schematic diagram of the initial state of the filter element quick change of the present invention.

[0044] Fig.11 It is a schematic diagram showing the two ends of the filter element of the present invention being removed.

[0045] Fig.12 It is a schematic diagram showing the state in which the old filter element of the present invention is removed.

[0046] Fig.13 Shown is a partial front schematic diagram of a water purifier using the quick-change structure and quick-change device of the present invention.

[0047] Fig.14 Shown is a partial schematic diagram of the rear side of a water purifier using the quick-change structure and quick-change device of the present invention.

[0048] Fig.15 Shown is a partial schematic top view of a water purifier using the quick-change structure and quick-change device of the present invention.

[0049] Wherein: filter element 1, interface 10, limit ring 101, guide block 102, annular groove 103, sealing ring 104, recessed area 1041, water inlet end 2, water outlet pipe 21, solenoid switch valve 22, two-position three-way reversing valve 23, injection channel 231, pressure relief channel 232, quick-change connector 24, connecting seat 241, connecting head 242, connecting rod 2421, sealing sheet 2422, steel ring 2423, locking claw 2424, second elastic member 2425, bladder 2426, first elastic member 243, water outlet end 3, drain pipe 31, lifting part 4, clamping part 5, clamping frame 50, clamping area 501, clamping belt 51, power source 52, gear pair 531, support roller 532, storage area 81, waste area 82, feeding belt 83. DETAILED DESCRIPTION

[0050] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0051] See also Figures 1 to 15. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0052] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0053] See also Figure 1 The present invention provides a filter element quick-change structure, comprising a water inlet end 2, a filter element 1 and a water outlet end 3, a filter membrane is provided inside the filter element 1, and interfaces 10 are provided at both ends of the filter element 1, and the two interfaces 10 are respectively connected to the water outlet end 3 and the water inlet end 2;

[0054] The water inlet end 2 includes a water outlet pipe 21, an electromagnetic switch valve 22, a two-position three-way reversing valve 23 and a quick-change joint 24. The electromagnetic switch valve 22 is installed on the water outlet pipe 21, and the quick-change joint 24 is installed at the end of the water outlet pipe 21. Before replacing the filter element 1, the electromagnetic switch valve 22 can cut off the water source first, and then open it after the replacement is completed.

[0055] See also Figure 2 and Figure 3The quick-change connector 24 includes a connecting seat 241, a connecting head 242 and a first elastic member 243. The inner diameter of the connecting seat 241 is fixedly connected to the water outlet pipe 21. The connecting seat 241 body is a cavity structure. The inner diameter of the connecting head 242 is slidably and sealedly connected to the water outlet pipe 21. The end of the connecting head 242 facing the connecting seat 241 is the tail end. The tail end of the connecting head 242 is provided with a connecting rod 2421. The connecting rod 2421 passes through the end surface of the connecting seat 241 and is inserted into the cavity of the connecting seat 241. A sealing sheet 2422 is provided at the end of the connecting rod 2421. The sealing sheet 2422 slides and seals with the side wall of the cavity of the connecting seat 241. The first elastic member 243 is arranged between the connecting seat 241 and the connecting head 242. The main body of the connection seat 241 is a cavity structure, and the connection head 242 cooperates with the connection seat 241 to form a device like a hydraulic cylinder. When water pressure is injected into the cavity structure of the connection seat 241, the water pressure can push the connection head 242 to move, thereby achieving a telescopic effect. A first elastic member 243 is arranged between the connection seat 241 and the connection head 242, and a restoring force can be formed between the connection seat 241 and the connection head 242. Specifically, when it is necessary to extend to dock with the filter element 1, water pressure is injected into the cavity structure of the main body of the connection seat 241, and the water pressure overcomes the elastic force of the first elastic member 243 and pushes the connection head 242 forward to dock with the interface 10 of the filter element 1; when the filter element 1 needs to be replaced, the cavity structure of the main body of the connection seat 241 is depressurized, and the sealing sheet 2422 loses the thrust of the water pressure. Under the reaction force of the first elastic member 243, the connection head 242 is pulled back to its original position, thereby achieving the effect of contraction of the connection head 242, so that the filter element 1 can be easily removed from the original installation position.

[0056] In the related art, since the filter element 1 is installed in series with the water pipe at both ends, the two ends of the filter element 1 must exceed the length of the gap between the water inlet pipe and the water outlet pipe of the water pipe, so as to ensure that both ends of the filter element 1 can be inserted into the water pipe. This method brings problems to the removal and installation of the filter element 1, because the filter element 1 that is longer than the gap of the water pipe cannot be inserted into the middle of the gap of the water pipe, and both sides must be inserted into the water pipe. Therefore, in the existing improved technology, the threaded screwing method is often used, that is, a sleeve with a thread is installed on the outlet pipe and the inlet pipe. When the sleeve rotates at the end of the water pipe, it will also move along the axis of the water pipe, thereby changing the distance between the inlet pipe and the outlet pipe. When installing the filter element 1, first twist the sleeve on the inlet pipe and the outlet pipe so that the distance between the inlet pipe and the outlet pipe is greater than the length of the filter element 1, then put in the filter element 1, and then reversely twist the sleeve to move the sleeve in the opposite direction, and then dock and lock the two ends of the filter element 1. This installation process is relatively cumbersome and it is difficult to achieve automatic replacement.

[0057] In this embodiment, please refer to Figure 4The two-position three-way reversing valve 23 includes a pressure injection channel 231 and a pressure relief channel 232. The two channels can be switched, and only one channel is connected at the same time. One end of the pressure injection channel 231 is connected to the water outlet pipe 21, and the other end is connected to the cavity of the connecting seat 241. One end of the pressure relief channel 232 is suspended, and the other end is also connected to the cavity of the connecting seat 241. When the filter element 1 reaches the end of its service life and needs to be replaced, the electromagnetic switch valve 22 first cuts off the main circuit water source, and then the injection channel 231 of the two-position three-way reversing valve 23 is closed and the pressure relief channel 232 is connected. At this time, the liquid in the cavity structure of the connecting seat 241 body loses pressure. Under the action of the first elastic member 243, the connector 242 retracts, so that the connector 242 is separated from the interface 10 of the filter element 1. At this time, the filter element 1 can be removed more conveniently and a new filter element 1 can be installed at the same time; after the new filter element 1 is placed, the two-position three-way reversing valve 23 switches the state, the injection channel 231 is opened and the pressure relief channel 232 is closed. At this time, the injection channel 231 is directly connected to the water source of the water pipe, and the water flows through the injection channel 231 to reach the cavity structure of the connecting seat 241, and overcomes the elastic force of the first elastic member 243, pushing the connector 242 forward and docking with the interface 10 of the filter element 1. After the docking is completed, the electromagnetic switch valve 22 is opened, and the filter element 1 starts to work normally. In this embodiment, the water source in the water pipe is used as the power to achieve the extension effect of the connecting head 242, and the elastic force of the first elastic member 243 is used as the power to achieve the retraction effect of the connecting head 242. The structure is simple and ingenious, and the extension and retraction effect of the connecting head 242 is achieved without the need for an external motor or hydraulic source, thereby simplifying the replacement process of the filter element 1. For the scenario where the filter element 1 is longer than the gap in the water pipe, the installation can be completed without rotation.

[0058] In this embodiment, the water source in the water pipe is used as the power, and the characteristics of the membrane separation filtration technology are fully utilized, that is, the pressure difference is used as the driving force to allow the pressurized water flow to pass through the dense filtration membrane. Therefore, the filtration technology itself requires the water source to have a water pressure that meets a certain strength. In the solution of this embodiment, this water pressure is used as the extension power of the connector 242.

[0059] The other end connection of the filter element 1, that is, the water outlet end 3 of the filter element 1, is directly inserted into the drain pipe 31. After this end is inserted into the drain pipe 31, the connector 242 at the other end extends out and is inserted into the connector 10 at the other end of the filter element 1 to complete the installation.

[0060] As a further solution of this embodiment, a one-way valve can be arranged between the water source and the two-position three-way reversing valve 23 to ensure that water can only flow into the cavity of the connecting seat 241 from the water source in the water pipe, and cannot flow in the opposite direction. In this way, on the one hand, it can prevent the water used as hydraulic power from flowing back into the water pipe and causing pollution; on the other hand, when the water supply is cut off or the water source pressure is insufficient, the water in the cavity of the connecting seat 241 will not flow back, and the cavity of the connecting seat 241 will not lose pressure, so that the connecting head 242 can be kept in an extended state to prevent unexpected retraction, thereby maintaining the connection state of the filter element 1, thereby improving the reliability of the system.

[0061] For this example, please refer to Figure 5 , a limiting ring 101 is provided on the interface 10 of the filter element 1;

[0062] See also Figure 6 and Figure 7 The body of the connector 242 is also a cavity structure, and a plurality of locking mechanisms are provided in an annular manner inside the connector 242. The locking mechanisms include a steel ring 2423, a locking claw 2424, a second elastic member 2425, and a bag 2426;

[0063] The steel ring 2423 is disposed around the inner side of the cavity at the rear end of the connector 242. The locking claw 2424 is approximately in the shape of an inverted "7". The locking claw 2424 includes a first longer straight section and a second shorter straight section. The end of the first straight section is rotatably connected to the steel ring 2423, and the end of the second straight section is hooked on the limiting ring 101.

[0064] One end of the second elastic member 2425 is connected to the first straight section, and the other end is connected to the cavity wall of the connector 242 and pulls the locking claw 2424 away from the limiting ring 101;

[0065] The bag 2426 is disposed at the rear of the second straight section. The bag 2426 is connected to a pressurized water pipe. When the bag 2426 is pressurized to a bulging state, the bag 2426 prevents the locking claw 2424 from detaching from the limiting ring 101 .

[0066] In the above embodiment, a locking mechanism is provided in the connector 242, and a limiting ring 101 is provided on the interface 10 of the filter element 1. After the connector 242 and the interface 10 of the filter element 1 are inserted and installed, water pressure is added to the bag 2426 to make the bag 2426 swell and support the second straight section of the locking claw 2424. The second straight section will hook the limiting ring 101, so that the multiple locking claws 2424 of the connector 242 firmly hold the filter element 1, thereby improving the installation stability of the filter element 1 and preventing the filter element 1 from loosening. When the filter element 1 needs to be removed, the water pressure in the bag 2426 is removed. At this time, the locking claw 2424 loses support. Under the pulling force of the second elastic member 2425, the locking claw 2424 is separated from the limiting ring 101. At this time, the connector 242 can be retracted, thereby being separated from the interface 10 of the filter element 1, and the filter element 1 can be removed. In this embodiment, the pressure source can be the same as the previous embodiment, taking water from the water source that needs to be purified, which increases the reliability of the installation of the filter element 1 but does not increase the complexity of the installation process.

[0067] As a further solution of the above embodiment, the pressurized water pipe is connected to any point of the injection channel 231 and the cavity of the connecting seat 241, because the injection channel 231 and the cavity of the connecting seat 241 are essentially connected and belong to the same liquid space, and the connection points are equivalent. In this connection mode, it is equivalent to that the connecting seat 241 and the bladder 2426 are connected;

[0068] Furthermore, the bag 2426 is an elastic wall bag, and the pressure used to prop up the bag 2426 and push the locking claw 2424 to hook the limiting ring 101 is greater than the pressure that pushes the connecting head 242 to slide in the cavity of the connecting seat 241. Specifically, when the filter element 1 needs to be replaced, after the new filter element 1 is placed in, the two-position three-way reversing valve 23 switches its state, the injection channel 231 opens and the pressure relief channel 232 closes. At this time, the injection channel 231 is directly connected to the water source of the water pipe, and the water flows through the injection channel 231 to reach the cavity structure of the connecting seat 241. In the process of water filling the cavity structure of the connecting seat 241, the water flow pressure will be lost. Since the pressure required for the water flow to support the bag 2426 is greater than the pressure required for the water flow to overcome the elastic force of the first elastic member 243, in this process, the water flow will first fill the cavity structure of the connecting seat 241 and push the connecting head 242 forward to dock with the interface 10 of the filter element 1. After the docking is completed, the water pressure changes from flow pressure to static pressure, and the water pressure returns to the water source pressure of the water pipe, thereby starting to support the bag 2426 and push the locking claw 2424 to hook the limit ring 101.

[0069] In the above embodiment, the difference between the propping pressure of the bag 2426 and the elastic force of the first elastic member 243 is used to realize step-by-step action using the same water source, ensuring that the connector 242 is extended first, and after the extension is completed, the locking claw 2424 is moved to hook the limit ring 101, which greatly improves the reliability of the system. The same principle applies when the pressure is released, because the rebound tendency of the bag 2426 is greater than the elastic force of the first elastic member 243, and the locking claw 2424 is also under the pulling force of the second elastic member 2425, when the pressure is released, the locking claw 2424 will return to its position first, and after the locking claw 2424 is separated from the limit ring 101, the connector 242 can begin to retract under the action of the first elastic member 243, which greatly improves the reliability of the system and prevents malfunction and non-action.

[0070] As another solution of the above embodiment, a locking control valve is provided on the pressurized water pipe, and the pressurized water pipe is connected to any point of the water outlet pipe 21 or the injection channel 231 and the cavity of the connecting seat 241. In this embodiment, a locking control valve is directly provided on the pressurized water pipe of the bag 2426, and the sequence of the expansion and contraction of the connector 242 and the hooking and locking of the locking claw 2424 is realized by the sequence of opening or closing of the locking control valve and the two-position three-way reversing valve 23. The solution in this embodiment simplifies the complexity of the selection and design of the first elastic member 243 and the elastic wall of the bag 2426, and there is no need to realize the sequence of the docking steps by the difference in the mechanical properties of the two, so the system complexity is reduced and its reliability is correspondingly improved.

[0071] In this embodiment, the first elastic member 243 is sleeved on the connecting rod 2421. The first elastic member 243 is used to pull back the connector 242 after the pressure in the cavity of the connecting seat 241 is released, thereby achieving a contraction effect. The first elastic member 243 can be a spring or other elastic material, but elastic materials have a common characteristic, that is, they will bend when subjected to lateral force, thereby causing failure. In this embodiment, the first elastic member 243 is sleeved on the connecting rod 2421, and the connecting rod 2421 bears the lateral force that the first elastic member 243 may be subjected to, which can improve the reliability of the first elastic member 243 and prevent the quick-change structure from failing and failing to extend or retract normally.

[0072] For this example, please refer to Figure 7 and Figure 5 , the interface 10 includes a guide block 102, an annular groove 103 and a sealing ring 104;

[0073] The guide block 102 is an angled structure, and the guide block 102 is arranged at the end of the interface 10. The angled structure can improve the insertion and matching accuracy of the filter element 1 and the connector 242, absorb certain deviations and automatically align;

[0074] The annular groove 103 is arranged between the guide block 102 and the limit ring 101, and the sealing ring 104 is arranged in the annular groove 103. The sealing ring plays a sealing role. The sealing ring is located between the interface 10 of the filter element 1 and the inner diameter of the connector 242, which can effectively improve the sealing performance and prevent water leakage.

[0075] As a further solution of the above embodiment, one end of the sealing ring 104 is aligned with the limit ring 101, and the other end of the sealing ring 104 is spaced from the end of the guide block 102, and the sealing ring 104 is provided with a recessed area 1041 at this end. After the filter element 1 is docked, the electromagnetic switch valve 22 is opened, and the high-pressure water source enters between the filter element 1 and the connector 242, and the water flow automatically fills the entire connection part. When the water flow enters the recessed area 1041, it will form pressure on the bottom and both sides of the recessed area 1041. The greater the water pressure, the greater the pressure, and the sealing ring 104 is tightly pressed between the interface 10 of the filter element 1 and the inner diameter of the connector 242, so that the sealing ring 104 is tightly attached to both at the same time, and the greater the pressure, the tighter it is attached, and a better sealing effect is obtained. In this embodiment, the water pressure is fully utilized as the power to squeeze the sealing ring, so as to achieve the water pressure self-sealing effect, and the sealing performance is adaptive to the water pressure, with high reliability and good sealing effect.

[0076] For an embodiment of a filter element quick change device, please refer to Figure 8 and Fig. 9 , including a lifting portion 4 and a clamping portion 5, wherein the clamping portion 5 is installed above the lifting portion 4, and the lifting portion 4 can move up and down with the clamping portion 5;

[0077] Also includes the above-mentioned filter element quick-change structure;

[0078] The clamping part 5 includes a clamping frame 50, a clamping belt 51 and a power source 52. A "U"-shaped clamping area 501 is provided inside the clamping frame 50. Two clamping belts 51 are arranged on both sides of the clamping area 501. The two clamping belts 51 are connected to the power source 52 through a synchronous driving mechanism, and the clamping surfaces of the two clamping belts 51 move in the same direction and speed.

[0079] The water inlet end 2 of the quick-change structure of the filter element 1 is located on the upper side of the clamping area 501, and the water outlet end 3 is located on the lower side of the clamping area 501. The filter element 1 is installed between the water inlet end 2 and the water outlet end 3, and the outer periphery of the filter element 1 contacts and cooperates with the clamping area 501.

[0080] As a further solution to the above embodiment, please refer to Fig. 9 , the synchronous driving mechanism includes a gear pair 531 and a plurality of supporting rollers 532;

[0081] The two groups of supporting rollers 532 support the two clamping belts 51 respectively, one of the gears of the gear pair 531 is connected to the power source 52 to obtain power, and the two gear shafts of the gear pair 531 are respectively connected to one of the roller shafts of the two groups of supporting rollers 532 to obtain power.

[0082] In this embodiment, the clamping belt 51 is a friction belt with a certain friction force. The power between the two clamping belts 51 is synchronized. When the filter element 1 is sandwiched between the two clamping belts 51, under the action of the power source 52, the two clamping belts 51 can move outward or inward. If it moves outward, when the filter element 1 reaches the end, it will be separated from the two clamping belts 51. If it moves inward, when it reaches the innermost side, the filter element 1 will be aligned with the "U"-shaped clamping area 501 provided on the inner side of the clamping frame 50 under the action of friction, and then slip with the clamping belt 51, starting the positioning function, so that it is aligned with the filter element quick-change structure. The function of the lifting part 4 is to allow the clamping area 501 to be inserted into or separated from the filter element 1 longitudinally.

[0083] See also Fig.10 This is the state before the filter element 1 is replaced. At this time, the lifting portion 4 is retracted, and the connector 242 is in a state of extending and docking with the filter element 1, that is, the filter element 1 is in a state of normal operation;

[0084] See also Fig.11 This is the state when the filter element 1 is ready to be replaced. At this time, the lifting part 4 is lifted, and the clamping part 5 overcomes the friction between the filter element 1 and the clamping belt 51 and enters the area of ​​the filter element 1. At this time, the clamping belt 51 has clamped the filter element 1, and the connector 242 has shrunk and detached from the filter element 1;

[0085] See also Fig.12 , this is the state where the filter element 1 has been removed. During this process, the clamping belt 51 sends the filter element 1 out of the original installation position. If the clamping belt 51 continues to operate at this time, when the filter element 1 reaches the end, it will be separated from the two clamping belts 51 and fall off. At this time, if a new filter element 1 is placed at the clamping belt 51, and the above steps are performed in reverse, the new filter element 1 can be installed, and the filter element 1 can be automatically replaced as a whole.

[0086] See also Figure 13-15 , Fig.13 A front view of a water purification device with five filter cartridges 1 is shown. Fig.14 is its rear side view, Fig.15 For its top view, Fig.14In the figure, the storage area 81 and the waste area 82 of the device are shown. A plurality of unused filter elements 1 are arranged in the storage area 81, and the waste area 82 is used to receive used filter elements 1. In the storage area 81, a plurality of filter elements 1 can be pre-connected by a feeding belt 83 and pass through each filter element 1 station in turn. When replacement is required, the old filter element 1 is removed by the filter element quick-change device and thrown into the waste area 82 in the above manner, and then the lifting part 4 is retracted to the bottom, allowing the feeding belt 83 to send the new filter element 1 to the workstation that needs to be replaced, and then the lifting part 4 is lifted, and the clamping part 5 overcomes the friction between the filter element 1 and the clamping belt 51 and enters the area of ​​the filter element 1. At this time, the clamping belt 51 has clamped the filter element 1, and then the lifting part 4 moves down a little to remove the new filter element 1 from the feeding belt 83, and then the clamping belt 51 works to move the new filter element 1 inward to the innermost side, and then the lifting part 4 moves down to allow the lower side interface 10 of the new filter element 1 to be inserted into the lower end water pipe, and then the upper end quick-change structure starts to move to achieve automatic connection.

[0087] The lifting part 4 includes at least one vertically arranged hydraulic cylinder, and the clamping part 5 is installed on the output shaft of the hydraulic cylinder. The hydraulic cylinder uses the high-pressure water source of the water inlet end 2 as the hydraulic source, so there is no need to set up an additional hydraulic source. Of course, an electric push rod can also be used, which is essentially the same, but only provides a power source for linear reciprocating motion.

[0088] In this embodiment, the filter element quick-change structure cooperates with the quick-change device, and the filtered water source acts as a power to realize the automatic replacement of the filter element 1. In this method, no manual participation is required, and it is completely automatically performed by the system. Compared with the method of completely manual operation in the prior art, it is more time-saving and labor-saving. In the prior art, it is precisely because of the need for manual operation that the filter element 1 can only be replaced regularly and once. Before the replacement date arrives, even if the service life of the filter element 1 has ended, it cannot be replaced in time; and when the replacement date arrives, even if the service life of the filter element 1 has not ended, it will be replaced completely. In this way, on the one hand, it leads to the failure of water quality filtration, and on the other hand, it also leads to incomplete service life of the filter element 1, and there are problems of waste and increased costs. Moreover, due to the different series and parallel modes of the filter element 1, the working time of each filter element, and the water quality conditions filtered by each filter element, the life progress of each other must be different. The method of always manually replacing regularly is obviously unreasonable. The scheme implemented in this way effectively overcomes the above problems, improves the quality of water quality filtration, simplifies manual work, saves equipment operation and maintenance costs, and has significant technical progress.

[0089] In summary, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0090] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A filter element quick-change structure, comprising a water inlet end (2), a filter element (1) and a water outlet end (3), wherein a filter membrane is provided inside the filter element (1), and interfaces (10) are provided at both ends of the filter element (1), and the two interfaces (10) are respectively connected to the water outlet end (3) and the water inlet end (2), characterized in that: The water inlet end (2) comprises a water outlet pipe (21), an electromagnetic switch valve (22), a two-position three-way reversing valve (23) and a quick-change joint (24); the electromagnetic switch valve (22) is installed on the water outlet pipe (21), and the quick-change joint (24) is installed at the end of the water outlet pipe (21); The quick-change connector (24) comprises a connection seat (241), a connection head (242) and a first elastic member (243); the inner diameter of the connection seat (241) is fixedly connected to the water outlet pipe (21); the connection seat (241) body is a cavity structure; the inner diameter of the connection head (242) is slidably and sealingly connected to the water outlet pipe (21); the end of the connection head (242) facing the connection seat (241) is the tail end; A connecting rod (2421) is provided at the tail end, the connecting rod (2421) passes through the end surface of the connecting seat (241) and is inserted into the cavity of the connecting seat (241), a sealing sheet (2422) is provided at the end of the connecting rod (2421), the sealing sheet (2422) is slidably matched with the side wall of the cavity of the connecting seat (241) and sealed, and the first elastic member (243) is arranged between the connecting seat (241) and the connecting head (242); The connecting head (242) can be extended and retracted relative to the connecting seat (241); when the connecting head (242) is extended, it is connected to the interface (10) of the filter element (1); The two-position three-way reversing valve (23) comprises a pressure injection channel (231) and a pressure relief channel (232), the two channels can be switched, and only one channel is connected at the same time, one end of the pressure injection channel (231) is connected to the water outlet pipe (21), and the other end is connected to the cavity of the connecting seat (241), and one end of the pressure relief channel (232) is suspended in the air, and the other end is also connected to the cavity of the connecting seat (241); The water outlet (3) comprises a drain pipe (31), and the interface (10) of the filter element (1) is inserted into the drain pipe (31).

2. A filter element quick-change structure according to claim 1, characterized in that: A limiting ring (101) is provided on the interface (10) of the filter element (1); The connecting head (242) also has a cavity structure. A plurality of locking mechanisms are provided in an annular manner inside the connecting head (242). The locking mechanisms include a steel ring (2423), a locking claw (2424), a second elastic member (2425) and a bladder bag (2426). The steel ring (2423) is disposed around the inner side of the cavity at the rear end of the connector (242); the locking claw (2424) is approximately in the shape of an inverted "7"; the locking claw (2424) comprises a first longer straight section and a second shorter straight section; the end of the first straight section is rotatably connected to the steel ring (2423), and the end of the second straight section is hooked onto the limiting ring (101); One end of the second elastic member (2425) is connected to the first straight section, and the other end is connected to the cavity wall of the connector (242) and pulls the locking claw (2424) away from the limiting ring (101); The bag (2426) is arranged at the rear of the second straight section, and the bag (2426) is connected to a pressurized water pipe. When the bag (2426) is pressurized to a bulging state, the bag (2426) will prevent the locking claw (2424) from detaching from the limiting ring (101).

3. A filter element quick-change structure as claimed in claim 2, characterized in that: The pressurized water pipe is connected to any one of the injection channel (231) and the cavity of the connecting seat (241); The bag (2426) is an elastic wall bag (2426), and the pressure used to prop up the bag (2426) and push the locking claw (2424) to hook the limiting ring (101) is greater than the pressure pushing the connecting head (242) to slide in the cavity of the connecting seat (241).

4. A filter element quick-change structure as claimed in claim 2, characterized in that: A locking control valve is provided on the pressurized water pipe, and the pressurized water pipe is connected to any one of the water outlet pipe (21) or the injection channel (231) and the cavity of the connecting seat (241).

5. A filter element quick-change structure as claimed in claim 1, characterized in that: The first elastic member (243) is sleeved on the connecting rod (2421).

6. A filter element quick-change structure as claimed in claim 2, characterized in that: The interface (10) comprises a guide block (102), an annular groove (103) and a sealing ring (104); The guide block (102) is an oblique angle structure, and the guide block (102) is arranged at the end of the interface (10); The annular groove (103) is provided between the guide block (102) and the limiting ring (101), and the sealing ring (104) is provided in the annular groove (103).

7. A filter element quick-change structure as claimed in claim 6, characterized in that: One end of the sealing ring (104) is aligned with the limiting ring (101), the other end of the sealing ring (104) leaves a gap with the end of the guide block (102), and the sealing ring (104) is provided with a recessed area (1041) at this end.

8. A filter element quick-change device, comprising a lifting portion (4) and a clamping portion (5), wherein the clamping portion (5) is mounted above the lifting portion (4), and the lifting portion (4) can move up and down with the clamping portion (5), characterized in that: Also includes the filter element quick-change structure as claimed in claim 1; The clamping portion (5) comprises a clamping frame (50), a clamping belt (51) and a power source (52); a U-shaped clamping area (501) is provided inside the clamping frame (50); two clamping belts (51) are provided on both sides of the clamping area (501); the two clamping belts (51) are connected to the power source (52) via a synchronous drive mechanism, and the clamping surfaces of the two clamping belts (51) move in the same direction and at the same speed; The water inlet end (2) of the filter element (1) quick-change structure is located at the upper side of the clamping area (501), and the water outlet end (3) is located at the lower side of the clamping area (501); the filter element (1) is installed between the water inlet end (2) and the water outlet end (3), and the outer periphery of the filter element (1) is in contact with and fits the clamping area (501).

9. A filter element quick-change device as claimed in claim 8, characterized in that: The synchronous drive mechanism comprises a gear pair (531) and a plurality of supporting rollers (532); The two groups of support rollers (532) respectively support the two clamping belts (51); one of the gears of the gear pair (531) is connected to the power source (52) to obtain power; and the two gear shafts of the gear pair (531) are respectively connected to one of the roller shafts of the two groups of support rollers (532) to obtain power.

10. A filter element quick-change device as claimed in claim 8, characterized in that: The lifting part (4) comprises at least one vertically arranged hydraulic cylinder, the clamping part (5) is mounted on the output shaft of the hydraulic cylinder, and the hydraulic cylinder uses the high-pressure water source at the water inlet end (2) as a hydraulic source.

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