Water tank purification device for travel trailer

Abstract

The invention belongs to the technical field of water tank purification devices, and particularly relates to a water tank purification device for a travel trailer. A dragging hook is fixedly connected to one side wall of the dragging bottom plate, moving wheels are arranged at the bottom of the dragging hook and the bottom of the dragging bottom plate, and a purification assembly is fixedly connected to the top of the dragging bottom plate; the purification assembly comprises a protective cylinder; a linkage cylinder is arranged at the top of the protective cylinder, the outer wall of the linkage cylinder is in threaded connection with the inner wall of the protective cylinder, and the inner wall of the linkage cylinder is fixedly connected with a multi-filtering mechanism, so that the regular cleaning time of the water tank of the motor home is prolonged, and after a dragging hook is connected with the tail of the motor home, moving wheels make contact with the ground; the purification assembly can be pulled and moved along with the touring car more conveniently, the multiple filtering mechanisms are utilized, the purification requirements of different requirements of the water tank of the touring car are met, the water supply time of passengers is saved, and purified tap water meets daily drinking water and domestic water of the passengers.

Description

Technical Field

[0001] The invention belongs to the technical field of water tank purification devices, and in particular relates to a water tank purification device for a trailer-type RV. Background Art

[0002] The water supply system of a traditional RV consists of a clean water tank, a gray water tank, a black water tank and connecting pipes, and the positions and sizes of each water tank need to be reasonably arranged in the limited space of the RV. For the clean water tank, it is necessary to have sufficient capacity to ensure the living water of the RV.

[0003] After searching, in the prior art, Chinese patent publication number CN210261411U, authorization announcement date: 2020-04-07, discloses a new type of stainless steel water tank purification device, including a water tank body, partitions are fixedly installed on both sides of the inside of the water tank body, the inside of the water tank body is divided into a disinfection chamber, a water storage chamber and a flow chamber by two partitions, and the water storage chamber is located inside the disinfection chamber and the flow chamber, and a number of guide plates are fixedly installed on both sides of the disinfection chamber in an interlaced state. The new stainless steel water tank purification device, through the coordinated use of the disinfection chamber, overflow port, partition, water storage chamber, flow box, flow chamber, guide plate, oxygen injection pipe, multi-branch connecting pipe, oxygen generator and air outlet, can create the phenomenon of water flow, avoid water not flowing inside the water tank body, and realize the water circulation flow inside the water tank body. At the same time, when the water passes through the flow chamber, it is fully in contact with oxygen, and the flowing water does not rot. Because it is rich in oxygen in the flowing water, the water itself will purify itself, and it is difficult for microorganisms to multiply in large quantities, and the purification effect is good.

[0004] However, the equipment still has the following defects: although the water can purify itself and microorganisms are difficult to reproduce in large numbers, the purification effect is good, but when the RV is driven to the outdoor environment, the RV water tank needs to be refilled near a gas station or public toilet. Since the tap water in gas stations or public toilets is mostly groundwater, it is supplied to the RV water tank for a long time, and the water tank needs to be cleaned regularly, which is time-consuming and laborious. The water tank purification device cannot be towed with the RV and is not convenient for outdoor use. Summary of the invention

[0005] In view of the above problems, the present invention provides a water tank purification device for a trailer-type RV, comprising a towing bottom plate; a towing hook is fixedly connected to one side wall of the towing bottom plate, and the towing hook and the bottom of the towing bottom plate are both provided with moving wheels, and a purification component is fixedly connected to the top of the towing bottom plate;

[0006] The purification component comprises a protective cylinder; a linkage cylinder is arranged on the top of the protective cylinder, the outer wall of the linkage cylinder is threadedly connected to the inner wall of the protective cylinder, and the inner wall of the linkage cylinder is fixedly connected with multiple filtering mechanisms.

[0007] Furthermore, a cover plate is rotatably connected to one side of the top of the linkage cylinder, and two groups of water pipe docking holes are opened on the outer wall of the linkage cylinder, and the two groups of water pipe docking holes are interconnected with the multiple filtering mechanisms, and a water injection sealing gasket is arranged at the bottom of the cover plate, and a water flow booster pump is embedded and installed on the surface of the water injection sealing gasket and the cover plate, and the output end of the water flow booster pump is interconnected with the multiple filtering mechanisms.

[0008] Furthermore, the multiple filtering mechanism includes a first filter part, a second filter part, a third filter part, a domestic water pipe and a drinking water pipe; the first filter part, the second filter part and the third filter part are the same in size and shape, and the first filter part, the second filter part and the third filter part are arranged in a circular array with the central axis of the linkage cylinder as the center, and a shock-absorbing part is provided on one side wall of the first filter part, the second filter part and the third filter part, and several groups of the shock-absorbing parts are fixedly connected to the inner wall of the linkage cylinder.

[0009] Furthermore, the first filter part, the second filter part and the third filter part are interconnected through a domestic water pipe, and a four-way valve is provided on the domestic water pipe. The first filter part, the second filter part and the third filter part are also interconnected through a drinking water pipe, and a three-way valve is provided on the drinking water pipe.

[0010] Furthermore, a vertical pipe is connected between the three-way valve and the four-way valve, and a side wall of the four-way valve is also connected to a water outlet pipe, and the end of the water outlet pipe extends into a group of water pipe docking holes. A solenoid valve is connected to a side wall of the first filter part near the bottom, and the end of the solenoid valve extends into another group of water pipe docking holes. The top of the first filter part is interconnected with the output end of the water flow booster pump.

[0011] Furthermore, the first filter part includes a filter cartridge; one end of the filter cartridge is an open structure, and a plurality of guide grooves are provided on the inner wall of the filter cartridge near the top, and a support rod is penetrated and slidably connected to the bottom of the filter cartridge.

[0012] Furthermore, a waterproof sealing ring sleeved around the support rod is provided at the bottom of the filter cartridge, a positioning plate is fixedly connected to the outside of the support rod, and a movable plate is also threadedly connected to the outside of the support rod.

[0013] Furthermore, the support rod is externally sleeved with a first filter cotton core and a second filter cotton core, the first filter cotton core is located on the top of the movable plate, and the second filter cotton core is clamped between the movable plate and the positioning plate.

[0014] Furthermore, the diameter of the movable plate is the same as the inner diameter of the filter cartridge, and the outer wall of the movable plate is also provided with several groups of guide protrusions, and the several groups of guide protrusions are all slidably fitted in the guide grooves, and the top of the filter cartridge is connected to the output end of the water flow booster pump.

[0015] Furthermore, the shock absorbing part includes a shock absorbing frame; the shock absorbing frame is an open structure, and the inner wall of the shock absorbing frame is slidably connected to a movable plate, the movable plate is penetrated and slidably connected to a guide rod, and a compression spring is sleeved on the guide rod.

[0016] The beneficial effects of the present invention are:

[0017] 1. Purify tap water through purification components, so that tap water can be effectively purified after entering the RV water tank, avoid the RV water tank being contaminated by tap water after adding water, extend the time of regular cleaning of the RV water tank, connect it to the rear of the RV with the towing hook, and use the moving wheels to contact the ground, so as to improve the convenience of the purification component following the RV towing movement, and use multiple filtering mechanisms to meet the purification requirements of different RV water tanks, save the water supply time of passengers, and make the purified tap water meet the daily drinking and living water of passengers.

[0018] 2. The top of the first filter part is connected with the output end of the water booster pump, so that the first filter cotton core in the first filter part first filters the tap water, and then under the action of the domestic water pipe, the tap water is diverted to the second filter part and the third filter part for purification and filtration again. The synchronous filtration of the second filter part and the third filter part is utilized to reduce the resistance to water during purification and filtration to ensure the flow rate. Under the action of the four-way valve, only the connection between the domestic water pipe, the four-way valve and the water outlet pipe is opened for passengers to connect one end of the water pipe with the water outlet pipe, and the other end of the water pipe with the RV water tank, so that the tap water from the gas station or public toilet is converted into domestic water after purification and stored in the RV water tank.

[0019] 3. Through the action of the four-way valve, only the domestic water pipe, the four-way valve, the vertical pipe, the drinking water pipe and the solenoid valve are opened to connect with each other, so that the vertical pipe transfers the purified and filtered domestic water to the drinking water pipe, and the drinking water pipe transfers the domestic water to the second filter part and the third filter part on both sides, and finally flows into the first filter part. The domestic water is repeatedly purified and filtered again through the second filter cotton core in each group of filter parts to form direct drinking water, which is finally discharged by the solenoid valve for passengers to store the direct drinking water in the RV direct drinking water tank.

[0020] 4. Through the action of the four-way valve, only the domestic water pipe, the four-way valve, the vertical pipe, the drinking water pipe and the solenoid valve are opened to connect with each other, so that the vertical pipe transfers the purified and filtered domestic water to the drinking water pipe, and the drinking water pipe transfers the domestic water to the second filter part and the third filter part on both sides, and finally flows into the first filter part. The domestic water is repeatedly purified and filtered again through the second filter cotton core in each group of filter parts to form direct drinking water, which is finally discharged by the solenoid valve for passengers to store the direct drinking water in the RV direct drinking water tank.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It shows a schematic structural diagram of a water tank purification device for a trailer-type RV according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a purification component according to an embodiment of the present invention is shown;

[0025] Figure 3 A schematic diagram of an exploded structure of a purification assembly according to an embodiment of the present invention is shown;

[0026] Figure 4 The structure diagram of the multi-filter mechanism of the embodiment of the present invention is shown. Figure 1 ;

[0027] Figure 5 The structure diagram of the multi-filter mechanism of the embodiment of the present invention is shown. Figure 2 ;

[0028] Figure 6 A schematic diagram showing the structure of the first filter unit according to an embodiment of the present invention is shown;

[0029] Figure 7 The schematic diagram of the structure of the shock absorbing part of the embodiment of the present invention is shown.

[0030] In the figure: 1, towing bottom plate; 2, towing hook; 3, moving wheel; 4, purification component; 41, protective cylinder; 42, linkage cylinder; 43, multiple filtering mechanism; 431, first filter part; 4312, guide slide; 4313, support rod; 4314, positioning plate; 4315, movable plate; 4316, guide protrusion; 4317, first filter cotton core; 4318, second filter cotton core; 4319, filter cylinder; 432, second filter part; 433, first Three filtering parts; 434, shock absorbing part; 4341, shock absorbing frame; 4342, movable plate; 4343, guide rod; 4344, compression spring; 435, domestic water pipe; 436, four-way valve; 437, drinking water pipe; 438, three-way valve; 439, vertical pipe; 43100, water outlet pipe; 4311, solenoid valve; 44, cover plate; 45, internal thread groove; 46, external gear ring; 47, water pipe docking hole; 48, water injection sealing gasket; 49, water flow booster pump. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The embodiment of the present invention provides a water tank purification device for a trailer RV, including a towing bottom plate 1; illustratively, Figure 1 shown.

[0033] A towing hook 2 is fixedly connected to one side wall of the towing base plate 1 , and moving wheels 3 are provided on the towing hook 2 and the bottom of the towing base plate 1 , and a purification component 4 is fixedly connected to the top of the towing base plate 1 .

[0034] Specifically, the purification component 4 is used to purify tap water so that the tap water can be effectively purified after entering the RV water tank, thereby preventing the RV water tank from being contaminated by tap water after adding water, extending the time for regular cleaning of the RV water tank, and after being connected to the rear of the RV using the towing hook 2, the moving wheels 3 are used to contact the ground, thereby improving the convenience of the purification component 4 following the RV towing movement.

[0035] The purification assembly 4 includes a protective tube 41; illustratively, as Figure 2 and Figure 3 shown.

[0036] A linkage cylinder 42 is provided at the top of the protective cylinder 41, and an outer gear ring 46 is provided on the outer wall of the linkage cylinder 42. An internal thread groove 45 is provided on the inner wall of the protective cylinder 41, and the outer wall of the linkage cylinder 42 is threadedly connected to the inner wall of the protective cylinder 41. A multiple filtering mechanism 43 is fixedly connected to the inner wall of the linkage cylinder 42. A cover plate 44 is rotatably connected to one side of the top of the linkage cylinder 42. Two groups of water pipe docking holes 47 are also provided on the outer wall of the linkage cylinder 42, and the two groups of water pipe docking holes 47 are interconnected with the multiple filtering mechanism 43. A water injection sealing gasket 48 is provided at the bottom of the cover plate 44, and a water flow booster pump 49 is embedded and installed on the surface of the water injection sealing gasket 48 and the cover plate 44, and the output end of the water flow booster pump 49 is interconnected with the multiple filtering mechanism 43.

[0037] Specifically, the cover plate 44 is used to seal the top of the linkage cylinder 42, and the water injection sealing gasket 48 is attached to the top of several groups of multiple filtering mechanisms 43 to prevent splashing during the water purification process of the several groups of multiple filtering mechanisms 43. The input end is connected to the tap water pipe by the water flow booster pump 49, and the output end of the water flow booster pump 49 is connected to the multiple filtering mechanisms 43. When the water flow booster pump 49 continues to work, the flow rate of the tap water is increased, so that the efficiency of the multiple filtering mechanisms 43 in purifying tap water is improved.

[0038] The multi-filter mechanism 43 includes a first filter 431, a second filter 432, a third filter 433, a domestic water pipe 435 and a drinking water pipe 437; illustratively, Figure 4 and Figure 5 shown.

[0039] The first filter part 431, the second filter part 432 and the third filter part 433 are all of the same size and shape, and the first filter part 431, the second filter part 432 and the third filter part 433 are arranged in a circular array with the central axis of the linkage cylinder 42 as the center, and the first filter part 431, the second filter part 432 and the third filter part 433 are all provided with a shock absorbing part 434 on one side wall, and several groups of the shock absorbing parts 434 are fixedly connected to the inner wall of the linkage cylinder 42, and the first filter part 431, the second filter part 432 and the third filter part 433 are all connected to each other through a domestic water pipe 435, and a four-way valve 436 is provided on the domestic water pipe 435. The filter part 431, the second filter part 432 and the third filter part 433 are also interconnected through a drinking water pipe 437, and a three-way valve 438 is provided on the drinking water pipe 437. A vertical pipe 439 is connected between the three-way valve 438 and the four-way valve 436. A side wall of the four-way valve 436 is also connected to a water outlet pipe 43100, and the end of the water outlet pipe 43100 extends into a group of water pipe docking holes 47. A solenoid valve 4311 is connected to a side wall of the first filter part 431 near the bottom, and the end of the solenoid valve 4311 extends into another group of water pipe docking holes 47. The top of the first filter part 431 is interconnected with the output end of the water flow booster pump 49.

[0040] The first filter unit 431 includes a filter cartridge 4319; illustratively, Figure 6 shown.

[0041] One end of the filter cartridge 4319 is an open structure, and a plurality of guide grooves 4312 are provided on the inner wall of the filter cartridge 4319 near the top. A support rod 4313 is passed through and slidably connected to the bottom of the filter cartridge 4319. A waterproof sealing ring is provided at the bottom of the filter cartridge 4319 and sleeved around the support rod 4313. A positioning plate 4314 is fixedly connected to the outside of the support rod 4313. A movable plate 4315 is also threadedly connected to the outside of the support rod 4313. A first filter cotton is sleeved on the outside of the support rod 4313. Core 4317 and a second filter cotton core 4318, the first filter cotton core 4317 is located at the top of the movable plate 4315, the second filter cotton core 4318 is clamped between the movable plate 4315 and the positioning plate 4314, the diameter of the movable plate 4315 is the same as the inner diameter of the filter cartridge 4319, the outer wall of the movable plate 4315 is also provided with a plurality of guide protrusions 4316, and the plurality of guide protrusions 4316 are all slidably fitted in the guide groove 4312, the top of the filter cartridge 4319 is connected to the output end of the water flow booster pump 49.

[0042] Specifically, the top of the first filter part 431 is connected to the output end of the water booster pump 49, so that the first filter cotton core 4317 in the first filter part 431 first filters the tap water, and then under the action of the domestic water pipe 435, the tap water is diverted to the second filter part 432 and the third filter part 433 for purification and filtration again. The synchronous filtration of the second filter part 432 and the third filter part 433 is used to reduce the resistance to water during purification and filtration, and ensure the flow rate. Under the action of the four-way valve 436, only the connection between the domestic water pipe 435, the four-way valve 436 and the water outlet pipe 43100 is opened, so that the passengers can connect one end of the water pipe with the water outlet pipe 43100, and the other end of the water pipe is connected to the RV water tank, so that the tap water from the gas station or public toilet is converted into domestic water after purification and stored in the RV water tank;

[0043] Under the action of the four-way valve 436, only the domestic water pipe 435, the four-way valve 436, the vertical pipe 439, the drinking water pipe 437 and the electromagnetic valve 4311 are opened to communicate with each other, so that the vertical pipe 439 transfers the purified and filtered domestic water to the drinking water pipe 437, and the drinking water pipe 437 transfers the domestic water to the second filter part 432 and the third filter part 433 on both sides, and finally flows into the first filter part 431, and the domestic water is repeatedly purified and filtered again by the second filter cotton core 4318 in each group of filter parts to form direct drinking water, and finally discharged by the electromagnetic valve 4311, so that the passengers can store the direct drinking water in the direct drinking water tank of the RV;

[0044] The linkage cylinder 42 rotates to one side so that the linkage cylinder 42 is threadedly connected into the protective cylinder 41, thereby driving the bottom of several groups of support rods 4313 to collide with the bottom of the protective cylinder 41. When the linkage cylinder 42 is completely rotated into the linkage cylinder 42, the several groups are separated from the guide slide groove 4312, which is convenient for passengers to replace several groups of first filter cotton cores 4317 after opening the cover plate 44. Since the second filter cotton core 4318 is arranged after the filtration of the first filter cotton core 4317, the replacement cycle of the second filter cotton core 4318 is longer than that of the first filter cotton core 4317. It is only necessary to rotate the movable plate 4315 and separate the thread of the support rod 4313 to facilitate the removal of the second filter cotton core 4318 for quick replacement.

[0045] The shock absorbing part 434 includes a shock absorbing frame 4341; illustratively, as Figure 7 shown.

[0046] The shock absorbing frame 4341 is an open structure, and a moving plate 4342 is slidably connected to the inner wall of the shock absorbing frame 4341 , a guide rod 4343 passes through and is slidably connected to the moving plate 4342 , and a compression spring 4344 is sleeved on the guide rod 4343 .

[0047] Specifically, the ends of the movable plate 4342 are fixedly connected to the first filter part 431, the second filter part 432 and the third filter part 433. On bumpy roads where the RV is traveling, the compression springs 4344 that are in contact with the ends of each group of movable plates 4342 are utilized to reduce the breakage of activated carbon in the filter cotton cores in the first filter part 431, the second filter part 432 and the third filter part 433, as well as the risk of bursting of the high-pressure water channel on bumpy roads, thereby extending the service life of the purification device in outdoor environments.

[0048] The working principle of a water tank purification device for a trailer RV proposed in an embodiment of the present invention is as follows:

[0049] The cover plate 44 is used to seal the top of the linkage cylinder 42, and the water injection seal 48 is used to fit the top of the multiple filter mechanisms 43 so that the multiple filter mechanisms 43 will not splash during the water purification process. The water booster pump 49 is used to connect the input end with the tap water pipe, and the output end of the water booster pump 49 is connected with the multiple filter mechanisms 43. When the water booster pump 49 continues to work, the flow rate of the tap water is increased, so that the efficiency of the multiple filter mechanisms 43 in purifying tap water is improved;

[0050] The top of the first filter part 431 is connected to the output end of the water booster pump 49, so that the first filter cotton core 4317 in the first filter part 431 first filters the tap water, and then under the action of the domestic water pipe 435, the tap water is diverted to the second filter part 432 and the third filter part 433 for purification and filtration again. The synchronous filtration of the second filter part 432 and the third filter part 433 is used to reduce the resistance to water during purification and filtration, and ensure the flow rate. Under the action of the four-way valve 436, only the connection between the domestic water pipe 435, the four-way valve 436 and the water outlet pipe 43100 is opened, so that the passengers can connect one end of the water pipe with the water outlet pipe 43100, and the other end of the water pipe is connected to the RV water tank, so that the tap water from the gas station or public toilet is converted into domestic water after purification and stored in the RV water tank;

[0051] Under the action of the four-way valve 436, only the domestic water pipe 435, the four-way valve 436, the vertical pipe 439, the drinking water pipe 437 and the electromagnetic valve 4311 are opened to be interconnected, so that the vertical pipe 439 transfers the purified and filtered domestic water to the drinking water pipe 437, and the drinking water pipe 437 transfers the domestic water to the second filter part 432 and the third filter part 433 on both sides, and finally flows into the first filter part 431, and the domestic water is repeatedly purified and filtered again by the second filter cotton core 4318 in each group of filter parts to form direct drinking water, and finally discharged by the electromagnetic valve 4311, so that the passengers can store the direct drinking water in the direct drinking water tank of the RV;

[0052] By rotating the linkage cylinder 42 to one side, the linkage cylinder 42 is threadedly connected and enters the protective cylinder 41, thereby driving the bottom of the plurality of support rods 4313 to collide with the bottom of the protective cylinder 41. When the linkage cylinder 42 is completely rotated into the linkage cylinder 42, the plurality of groups are separated from the guide slide groove 4312, so that the passengers can replace the plurality of first filter cotton cores 4317 after opening the cover plate 44. Since the second filter cotton core 4318 is arranged after the filtering of the first filter cotton core 4317, the replacement cycle of the second filter cotton core 4318 is longer than that of the first filter cotton core 4317. It is only necessary to rotate the movable plate 4315 and separate the support rod 4313 from the thread, so as to facilitate the removal of the second filter cotton core 4318 for quick replacement.

[0053] The ends of the movable plates 4342 are fixedly connected to the first filter part 431, the second filter part 432 and the third filter part 433. On bumpy roads where the RV is traveling, the compression springs 4344 that abut against the ends of each set of movable plates 4342 are utilized to reduce the breakage of activated carbon in the filter cotton cores in the first filter part 431, the second filter part 432 and the third filter part 433, as well as the risk of bursting of the high-pressure water channel on bumpy roads, thereby extending the service life of the purification device in outdoor environments.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water tank purification device for a trailer RV, characterized by: It comprises a towing base plate (1); a towing hook (2) is fixedly connected to one side wall of the towing base plate (1), and the towing hook (2) and the bottom of the towing base plate (1) are both provided with moving wheels (3); and a purification component (4) is fixedly connected to the top of the towing base plate (1); The purification component (4) comprises a protective cylinder (41); a linkage cylinder (42) is arranged on the top of the protective cylinder (41); the outer wall of the linkage cylinder (42) is threadedly connected to the inner wall of the protective cylinder (41); and the inner wall of the linkage cylinder (42) is fixedly connected with a multiple filtering mechanism (43).

2. The water tank purification device for a trailer caravan according to claim 1, characterized in that: A cover plate (44) is rotatably connected to one side of the top of the linkage cylinder (42); two groups of water pipe docking holes (47) are also provided on the outer wall of the linkage cylinder (42); and the two groups of water pipe docking holes (47) are interconnected with the multiple filtering mechanism (43); a water injection sealing gasket (48) is provided at the bottom of the cover plate (44); a water flow booster pump (49) is embedded and installed on the surface of the water injection sealing gasket (48) and the cover plate (44); and the output end of the water flow booster pump (49) is interconnected with the multiple filtering mechanism (43).

3. The water tank purification device for a trailer caravan according to claim 1, characterized in that: The multiple filtering mechanism (43) comprises a first filtering part (431), a second filtering part (432), a third filtering part (433), a domestic water pipe (435) and a drinking water pipe (437); the first filtering part (431), the second filtering part (432) and the third filtering part (433) are of the same size and shape, and the first filtering part (431), the second filtering part (432) and the third filtering part (433) are arranged in a circular array with the central axis of the linkage cylinder (42) as the center; a shock absorbing part (434) is arranged on one side wall of the first filtering part (431), the second filtering part (432) and the third filtering part (433), and a plurality of groups of the shock absorbing parts (434) are fixedly connected to the inner wall of the linkage cylinder (42).

4. The water tank purification device for a trailer caravan according to claim 3, characterized in that: The first filter part (431), the second filter part (432) and the third filter part (433) are interconnected through a domestic water pipe (435), and a four-way valve (436) is provided on the domestic water pipe (435). The first filter part (431), the second filter part (432) and the third filter part (433) are also interconnected through a drinking water pipe (437), and a three-way valve (438) is provided on the drinking water pipe (437).

5. The water tank purification device for a trailer caravan according to claim 4, characterized in that: A vertical pipe (439) is connected between the three-way valve (438) and the four-way valve (436); a side wall of the four-way valve (436) is also connected to a water outlet pipe (4310), and the end of the water outlet pipe (4310) extends into a group of water pipe docking holes (47); a solenoid valve (4311) is connected to a side wall of the first filter part (431) near the bottom, and the end of the solenoid valve (4311) extends into another group of water pipe docking holes (47); and the top of the first filter part (431) is connected to the output end of the water flow booster pump (49).

6. The water tank purification device for a trailer caravan according to claim 3, characterized in that: The first filter portion (431) includes a filter cartridge (4319); one end of the filter cartridge (4319) is an open structure, and a plurality of guide grooves (4312) are provided on the inner wall of the filter cartridge (4319) near the top, and a support rod (4313) is penetrated and slidably connected to the bottom of the filter cartridge (4319).

7. The water tank purification device for a trailer caravan according to claim 6, characterized in that: The bottom of the filter cartridge (4319) is provided with a waterproof sealing ring sleeved around the support rod (4313), the outside of the support rod (4313) is fixedly connected to a positioning plate (4314), and the outside of the support rod (4313) is also threadedly connected to a movable plate (4315).

8. The water tank purification device for a trailer caravan according to claim 7, characterized in that: The support rod (4313) is externally sleeved with a first filter cotton core (4317) and a second filter cotton core (4318), wherein the first filter cotton core (4317) is located at the top of the movable plate (4315), and the second filter cotton core (4318) is clamped between the movable plate (4315) and the positioning plate (4314).

9. The water tank purification device for a trailer caravan according to claim 8, characterized in that: The diameter of the movable plate (4315) is the same as the inner diameter of the filter cartridge (4319). The outer wall of the movable plate (4315) is also provided with a plurality of groups of guide protrusions (4316), and the plurality of groups of guide protrusions (4316) are all slidably connected in the guide groove (4312). The top of the filter cartridge (4319) is connected to the output end of the water flow booster pump (49).

10. The water tank purification device for a trailer caravan according to claim 3, characterized in that: The shock absorbing part (434) comprises a shock absorbing frame (4341); the shock absorbing frame (4341) is an open structure, and the inner wall of the shock absorbing frame (4341) is slidably connected to a movable plate (4342), a guide rod (4343) passes through and is slidably connected to the movable plate (4342), and a compression spring (4344) is sleeved on the guide rod (4343).

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