CN109682133B

CN109682133B - Water changing device with backflow preventing and flow regulating structure

Info

Publication number: CN109682133B
Application number: CN201811563100.XA
Authority: CN
Inventors: 杨开国; 沈韶武
Original assignee: Jinguoda Technology Hunan Co ltd
Current assignee: Jinguoda Technology Hunan Co ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2021-01-01
Anticipated expiration: 2038-12-20
Also published as: CN109682133A

Abstract

The invention discloses a backflow-preventing water changing device with a flow regulating structure, which comprises an air conditioning water tank, a telescopic cylinder and a drain pipe, wherein the water changing tank is arranged above the air conditioning water tank, a water inlet pipe is arranged on one side of the water changing tank, and the telescopic cylinder is arranged at the top of the water changing tank; the utility model discloses a water exchange box, including water exchange box, drain pipe, device box, regulating rod, gag lever post, fixing strip and device box, the drain pipe is fixed at the opposite side of trading the water tank, and the outside cover of drain pipe is equipped with the device box, and the below of drain pipe is connected with the connecting pipe, and the regulation pole is installed at the top of device box, and the bottom of adjusting the pole is connected with the jam piece, the avris of jam piece is provided with the gag lever post. This but water changing device from taking flow regulation and control structure of anti-return can change the waste water in the central air conditioning water tank to water changing device has the function of anti-return and flow regulation and control, can filter aquatic impurity among the water changing process, has promoted and has traded water efficiency.

Description

Water changing device with backflow preventing and flow regulating structure

Technical Field

The invention relates to the technical field of central air conditioners, in particular to a backflow-preventing water changing device with a flow regulating and controlling structure.

Background

Central authorities empty menstruation and use the back for a long time, its water tank is inside to have dirt and bacterial growing, and trades water and indicates to discharge original waste water in the air conditioning water tank, lets in the process of clean water, guarantees that the water tank that will use remains a clean state throughout, and the current mode of trading has following problem nevertheless: 1. most of the water needs to be changed manually, the time and the labor are consumed, the operation steps are complicated, the water changing efficiency is low, and the water after being changed still contains impurities; 2. after being discharged, the wastewater is easy to flow back into the air conditioning water tank, does not have the function of backflow prevention, and cannot regulate and control the flow of discharged water; 3. the in-process of trading water can't carry out prefilter to waste water, leads to the discharged water to cause the pollution to the environment, and the impurity of crossing the filtration takes out inconveniently. Aiming at the problems, innovative design is urgently needed on the basis of the original water changing mode.

Disclosure of Invention

The invention aims to provide a backflow-preventing water changing device with a flow regulating and controlling structure, and aims to solve the problems that the water changing efficiency is low, the backflow-preventing function is not realized, the flow of discharged water cannot be regulated and controlled, and the primary filtration of waste water cannot be performed in the water changing process due to manual water changing.

In order to achieve the purpose, the invention provides the following technical scheme: a backflow-preventing water changing device with a flow regulating structure comprises an air conditioning water tank, a telescopic cylinder and a water discharging pipe, wherein the water changing tank is installed above the air conditioning water tank, a water inlet pipe is arranged on one side of the water changing tank, a water discharging pipe is fixed at the bottom of the water changing tank, a partition plate is arranged at the middle position of the water changing tank, the telescopic cylinder is installed at the top of the water changing tank, the top of the telescopic cylinder is connected with an adjusting plate through a first supporting seat, the middle position of the adjusting plate is installed above the water changing tank through a supporting rod, through grooves are formed in two ends of the adjusting plate, a connecting rod is arranged on the inner side of each through groove, valve blocks are installed at the bottom of each connecting rod, two valve blocks are symmetrically arranged on each partition plate, a tamping rod is connected to the bottom of each valve block, a water outlet pipe is arranged at the inner bottom, and the edge of the fixed groove is provided with a clamping groove, a repair window is arranged below the fixed groove, a door plate is arranged inside the repair window, a pull rod is fixed on the lateral side of the door plate, a filter screen is arranged below the valve block, a limiting block is fixed on the lower end face of the filter screen, a second supporting seat is arranged at the edge of the filter screen, a spring is connected on the upper end face of the filter screen, a connecting plate is arranged at the end of the spring, a fixing plate is fixed on the lateral side of the connecting plate, a groove is arranged on the water changing box outside the fixing plate, the drain pipe is fixed on the other side of the water changing box, a device box is sleeved outside the drain pipe, a connecting pipe is connected below the drain pipe, an adjusting rod is arranged at the top of the device box, the bottom of the adjusting rod is connected with a blocking block, the lateral side of the blocking block is provided with a limiting, and a fixing block is fixed inside the device box.

Preferably, the connecting rod constitutes sliding construction through leading to groove and regulating plate, and regulating plate and bracing piece constitute rotating-structure to the both ends of regulating plate all are provided with the connecting rod.

Preferably, the two valve blocks move in opposite directions, and the sides of the valve blocks are tightly attached to the inner wall of the water change box.

Preferably, the fixing groove and the door panel form a lifting structure, and the length and width of the door panel are greater than those of the repair window.

Preferably, the inboard of door plant is provided with down stay cord and last stay cord, and the end department of lower stay cord links to each other with the up end of filter screen to go up the edge that the stay cord passes through horizontal pole and filter screen and link to each other.

Preferably, the two ends of the cross rod are respectively connected with the water changing tank and the partition plate, the lower pull rope and the upper pull rope are both made of elastic materials, and the height of the cross rod is lower than the lowest point of the valve block.

Preferably, the filter screen passes through the second supporting seat and trades water tank group constitution revolution mechanic, and the filter screen is provided with two about the central axis symmetry of ram.

Preferably, the connecting plate passes through fixed plate and recess constitution sliding construction, and connecting plate and filter screen vertical setting.

Preferably, the adjusting rod and the device box are in threaded connection, the device box and the drain pipe are both obliquely arranged, the adjusting rod and the plugging block are welded, and meanwhile, the plugging block is in sliding connection with the fixing strip through the limiting rod.

Compared with the prior art, the invention has the beneficial effects that:

1. this but water changing device from taking flow regulation and control structure of anti-return can change the waste water in the central air conditioning water tank to water changing device has the function of anti-return and flow regulation and control, can filter aquatic impurity among the water changing process, has promoted and has traded water efficiency.

2. Through setting up regulating plate, bracing piece, connecting rod and valve block, through telescopic cylinder's drive, can discharge the water suction in the air conditioning water tank through the drain pipe to two valve blocks are through the up-and-down motion of alternating expression, and then realize the drainage operation that absorbs water that does not stop.

3. The drainage pipe and the device box which are obliquely arranged can accelerate the drainage speed of water and prevent the drained water from flowing back into the water changing tank; through the setting of adjusting pole, jam piece, gag lever post and fixed strip, can be through the rotation of adjusting the pole, and then control the circulation of drain pipe and connecting pipe, reach the purpose of regulation flow size.

4. Through setting up filter screen, stopper, supporting seat and spring, impurity to in the waste water of discharging has the filter action, and the setting of door plant, stay cord and horizontal pole can drive the filter screen roll-off in step when opening the door plant simultaneously, and then reaches the purpose quick to impurity clearance.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of a front cross-sectional view of the present invention;

FIG. 3 is a schematic view of the valve block of the present invention after movement;

FIG. 4 is a schematic view of the internal structure of the cartridge of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 6 is a schematic side view of a door panel according to the present invention.

In the figure: 1. an air conditioning water tank; 2. changing the water tank; 3. a water inlet pipe; 4. a sewer pipe; 5. a partition plate; 6. a telescopic cylinder; 7. a first support base; 8. an adjusting plate; 9. a support bar; 10. a through groove; 11. a connecting rod; 12. a valve block; 13. a tamping rod; 14. a water outlet pipe; 15. fixing grooves; 16. a card slot; 17. repairing the window; 18. a door panel; 181. a lower pull rope; 182. pulling a rope upwards; 183. a cross bar; 19. a pull rod; 20. filtering with a screen; 21. a limiting block; 22. a second support seat; 23. a spring; 24. a connecting plate; 25. a fixing plate; 26. a groove; 27. a drain pipe; 28. a device cartridge; 29. a connecting pipe; 30. adjusting a rod; 31. a plugging block; 32. a limiting rod; 33. a fixing strip; 34. and (5) fixing blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a but water installation that trades of anti-return from taking flow regulation and control structure, including air conditioning water tank 1, trade water tank 2, inlet tube 3, downcomer 4, division board 5, telescopic cylinder 6, first supporting seat 7, regulating plate 8, bracing piece 9, logical groove 10, connecting rod 11, valve block 12, ram 13, outlet pipe 14, fixed slot 15, draw-in groove 16, repair window 17, door plant 18, pull rod 19, filter screen 20, stopper 21, second supporting seat 22, spring 23, connecting plate 24, fixed plate 25, recess 26, drain pipe 27, device box 28, connecting pipe 29, adjust pole 30, jam piece 31, gag lever post 32, fixed strip 33 and fixed block 34.

A water changing tank 2 is arranged above the air conditioning water tank 1, a water inlet pipe 3 is arranged on one side of the water changing tank 2, a sewer pipe 4 is fixed at the bottom of the water changing tank 2, and a partition plate 5 is arranged at the middle position of the water changing tank 2; telescopic cylinder 6 installs at the top of trading water tank 2, and telescopic cylinder 6's top links to each other through first supporting seat 7 and regulating plate 8, and regulating plate 8's intermediate position passes through bracing piece 9 and installs in the top of trading water tank 2, and regulating plate 8's both ends have seted up logical groove 10, and the inboard that leads to groove 10 is provided with connecting rod 11, and valve block 12 is installed to the bottom of connecting rod 11. Two valve blocks 12 are symmetrically arranged on the partition plate 5, the bottom of each valve block 12 is connected with a tamping rod 13, and a water outlet pipe 14 is arranged at the inner bottom of the water changing tank 2 below the tamping rods 13. The outer surface of the water changing tank 2 is provided with a fixing groove 15, a clamping groove 16 is arranged at the edge of the fixing groove 15, a repairing window 17 is arranged below the fixing groove 15, a door plate 18 is arranged inside the repairing window 17, and a pull rod 19 is fixed on the side of the door plate 18. Filter screen 20 is installed to the below of valve block 12, and the lower terminal surface of filter screen 20 is fixed with stopper 21, and second supporting seat 22 is installed to the edge of filter screen 20, and the up end of filter screen 20 is connected with spring 23, and connecting plate 24 is installed to the end department of spring 23, and the avris of connecting plate 24 is fixed with fixed plate 25 to seted up recess 26 on the water tank 2 that trades in the fixed plate 25 outside. The drain pipe 27 is fixed to the other side of the change water tank 2, and an apparatus box 28 is fitted to the outside of the drain pipe 27, and a connection pipe 29 is connected to the lower side of the drain pipe 27. The top of the device box 28 is provided with an adjusting rod 30, the bottom of the adjusting rod 30 is connected with a blocking block 31, the side of the blocking block 31 is provided with a limiting rod 32, the end of the limiting rod 32 is connected with the inner wall of the device box 28 through a fixing strip 33, and a fixing block 34 is fixed inside the device box 28.

Connecting rod 11 constitutes sliding construction through logical groove 10 and regulating plate 8, and regulating plate 8 and bracing piece 9 constitute rotating-structure to the both ends of regulating plate 8 all are provided with connecting rod 11, and the motion opposite direction of two valve blocks 12, the avris of valve block 12 and the inner wall of trading water tank 2 closely laminate. The telescopic cylinder 6 pushes the adjusting plate 8 to rotate on the supporting rod 9, the adjusting plate 8 and the supporting rod 9 form a lever principle, and then the two valve blocks 12 are driven to do staggered lifting motion, the thrust is achieved when the valve blocks descend, the suction is achieved when the valve blocks ascend, and the purpose that water flows ceaselessly is achieved.

The fixing groove 15 and the door panel 18 form a lifting structure, the length and width of the door panel 18 is greater than that of the repair window 17, the inner side of the door panel 18 is provided with a lower pull rope 181 and an upper pull rope 182, the end of the lower pull rope 181 is connected with the upper end face of the filter screen 20, and the upper pull rope 182 is connected with the edge of the filter screen 20 through a cross rod 183. The both ends of horizontal pole 183 link to each other with trading water tank 2 and division board 5 respectively, and pull-down rope 181 and last stay cord 182 are elastic material to horizontal pole 183 highly is less than the minimum of valve block 12, and the door plant 18 moves and drives pull-down rope 181 and stretch, drives pull-up rope 182 and relaxs and slide on horizontal pole 183, and when pulling pull rod 19 drove door plant 18 and descend, because the resilience of last stay cord 182, drive filter screen 20 and slide to initial position.

Filter screen 20 constitutes revolution mechanic through second supporting seat 22 with trade water tank 2, and filter screen 20 is provided with two about the central axis symmetry of ram 13, waste water produces impulsive force to filter screen 20 when getting into air conditioner water tank 1 through outlet pipe 14, filter screen 20 upwards rotates through second supporting seat 22, because the resilience of spring 23 and stopper 21's support, filter screen 20 can be in the horizontality always when not atress, can be with the filter screen 20 up end of the impurity interception of aquatic, have preliminary filtering to waste water.

The connecting plate 24 passes through fixed plate 25 and recess 26 constitution sliding construction, and connecting plate 24 and filter screen 20 set up perpendicularly, because the elastic action of stay cord 181 and last stay cord 182 down, can reach through the pulling and drive connecting plate 24 and fixed plate 25 at the gliding purpose of changing water tank 2 upper groove 26, filter screen 20 just can be along with the synchronous roll-off of the rising of door plant 18 like this, and convenient to use person clears up the impurity on the filter screen 20.

Adjust pole 30 and device box 28 for threaded connection, and device box 28 and drain pipe 27 are the slope setting, and adjust pole 30 and jam piece 31 for the welding, stifled chock 31 passes through gag lever post 32 and fixed strip 33 sliding connection simultaneously, adjust pole 30 through rotating and drive gag lever post 32 and slide in fixed strip 33 through stifled chock 31, let stifled chock 31 only do elevating movement and can not rotate, when blockking up 31 and rotate between drain pipe 27 and the connecting pipe 29 of disconnection, the circulation to water has the effect of blockking, can control the flow size of water, also make things convenient for the log to different positions, the slope sets up and can avoid the discharged water backward flow to advance in the change water tank 2.

The working principle is as follows: when using this but water installation that trades of anti-return from taking flow regulation and control structure, as shown in fig. 1, 2 and 3, at first install the water tank 2 that trades in the air conditioner water tank 1 top that needs the water of trading, let in clean water in inlet tube 3, telescopic cylinder 6 promotes regulating plate 8 and rotates on bracing piece 9, regulating plate 8 and bracing piece 9 constitute lever principle, and telescopic cylinder 6's one end can rotate between through first supporting seat 7 and regulating plate 8, the other end with trade between the water tank 2, can not influence regulating plate 8's rotation like this. The adjusting plate 8 drives the valve block 12 to lift in the water changing tank 2 through the connecting rod 11 when rotating up and down, the top of the connecting rod 11 can slide on the adjusting plate 8 through the through groove 10, so that the valve block 12 can be ensured to lift vertically, and the edge of the valve block 12 is tightly attached to the inner wall of the water changing tank 2, so that thrust is generated when the valve block is lowered, and clean water on one side of the partition plate 5 is pushed into the air-conditioning water tank 1 through the sewer pipe 4; then the valve block 12 on the other side of the partition plate 5 rises to generate suction force, and the waste water in the air-conditioning water tank 1 is sucked into the water-changing water tank 2 through the water outlet pipe 14 and is discharged through the water outlet pipe 27, so that the purpose of water circulation in the air-conditioning water tank 1 is achieved.

As shown in fig. 2 and 5, waste water produces impulsive force to filter screen 20 when getting into air conditioning water tank 1 through outlet pipe 14, filter screen 20 upwards rotates through second supporting seat 22, because the resilience of spring 23 and the support of stopper 21, filter screen 20 can be in the horizontality always when not atress, can intercept the dirt of long-term accumulation in air conditioning water tank 1 at filter screen 20 up end, have the primary filter effect to waste water, also can avoid discharged dirt backward flow to enter air conditioning water tank 1 in, valve block 12 can drive ram 13 flexible in outlet pipe 14 when the motion, avoid great impurity to cause the jam to outlet pipe 14.

As shown in fig. 2 and 4, the water after filtering is discharged through the drain pipe 27, then through rotating the regulation pole 30 that is threaded connection with the device box 28, and then drive the gag lever post 32 through the jam piece 31 and slide in the fixed strip 33, make the jam piece 31 only do elevating movement and can not rotate, when the jam piece 31 moves to between drain pipe 27 and the connecting pipe 29, the circulation to water has the effect of blockking, therefore water can be discharged from drain pipe 27 and connecting pipe 29 respectively, the effect of the flow size of control water has, also make things convenient for the water to discharge to different positions, let the discharged water realize different usage, avoid water waste. When the adjusting rod 30 is rotated to drive the blocking block 31 to be positioned at the top of the device box 28, the water can be drained from the water draining pipe 27 and the connecting pipe 29 simultaneously, the fixing block 34 has a limiting effect on the adjusting range of the adjusting rod 30, and the water draining pipe 27 and the connecting pipe 29 are arranged in an inclined mode, so that the drained water can be prevented from flowing back into the water changing tank 2.

As shown in fig. 1, 2, 5 and 6, the user promotes door plant 18 to slide in fixed slot 15 through pull rod 19, then with pull rod 19 card in draw-in groove 16, repair window 17 this moment and be in the open mode, pull rope 181 is tensile under the door plant 18 motion drives, pull rope 182 relaxs and slides on horizontal pole 183 in the drive, and then reach and drive connecting plate 24 and fixed plate 25 and trade the gliding mesh in water tank 2 upper groove 26, filter screen 20 just can be along with the synchronous roll-off of the rising of door plant 18 like this, convenient to use person clears up the dirt on filter screen 20, then when pulling pull rod 19 drives door plant 18 and descends, because the resilience of last pull rope 182, drive filter screen 20 and slide to initial position.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a but water installation that trades of anti-return from taking flow regulation and control structure, includes air conditioning water tank (1), telescopic cylinder (6) and drain pipe (27), its characterized in that: a water changing tank (2) is mounted above the air conditioning water tank (1), a water inlet pipe (3) is arranged on one side of the water changing tank (2), a sewer pipe (4) is fixed at the bottom of the water changing tank (2), a partition plate (5) is arranged at the middle position of the water changing tank (2), clean water is stored on one side of the partition plate (5), and waste water discharged from the air conditioning water tank (1) is stored on the other side of the partition plate (5); the telescopic cylinder (6) is installed at the top of the water changing box (2), the top of the telescopic cylinder (6) is connected with the adjusting plate (8) through the first supporting seat (7), the middle position of the adjusting plate (8) is installed above the water changing box (2) through the supporting rod (9), and through grooves (10) are formed in two ends of the adjusting plate (8); the inner side of the through groove (10) is provided with a connecting rod (11), the bottom of the connecting rod (11) is provided with two valve blocks (12), the two valve blocks (12) are symmetrically arranged relative to the partition plate (5), the bottom of the valve block (12) on the side, where the wastewater is stored, of the partition plate (5) is connected with a tamping rod (13), and the inner bottom of the water changing box (2) below the tamping rod (13) is provided with a water outlet pipe (14); a fixing groove (15) is formed in the outer surface of the water changing box (2), a clamping groove (16) is formed in the edge of the fixing groove (15), a repairing window (17) is formed below the fixing groove (15), a door plate (18) is installed inside the repairing window (17), and a pull rod (19) is fixed on the side of the door plate (18); a filter screen (20) is installed below a valve block (12) on one side, where the wastewater is stored, of the partition plate (5), a limiting block (21) is fixed on the lower end face of the filter screen (20), a second supporting seat (22) is installed at the edge of the filter screen (20), a spring (23) is connected to the upper end face of the filter screen (20), a connecting plate (24) is installed at the end of the spring (23), a fixing plate (25) is fixed to the side of the connecting plate (24), and a groove (26) is formed in a water changing box (2) on the outer side of the fixing plate (25); the drain pipe (27) is fixed on the other side of the water changing tank (2), a device box (28) is sleeved on the outer side of the drain pipe (27), and a connecting pipe (29) is connected below the drain pipe (27); the top of the device box (28) is provided with an adjusting rod (30), the bottom of the adjusting rod (30) is connected with a blocking block (31), the side of the blocking block (31) is provided with a limiting rod (32), the end of the limiting rod (32) is connected with the inner wall of the device box (28) through a fixing strip (33), and a fixing block (34) is fixed inside the device box (28); the adjusting rod (30) and the blocking block (31) are welded, the blocking block (31) is connected with the fixing strip (33) in a sliding mode through the limiting rod (32), when the blocking block (31) moves between the drain pipe (27) and the connecting pipe (29), water is discharged from the drain pipe (27) and the connecting pipe (29) respectively, and when the adjusting rod (30) is rotated to drive the blocking block (31) to be located at the top of the device box (28), the drain pipe (27) and the connecting pipe (29) drain water simultaneously.

2. The water changing device with the flow regulating structure and capable of preventing backflow according to claim 1, wherein: connecting rod (11) constitute sliding construction through leading to groove (10) and regulating plate (8), and regulating plate (8) and bracing piece (9) constitute rotating-structure, and the both ends of regulating plate (8) all are provided with connecting rod (11).

3. The water changing device with the flow regulating structure and capable of preventing backflow according to claim 1, wherein: the motion directions of the two valve blocks (12) are opposite, and the side of the valve block (12) is tightly attached to the inner wall of the water changing box (2).

4. The water changing device with the flow regulating structure and capable of preventing backflow according to claim 1, wherein: the fixed groove (15) and the door panel (18) form a lifting structure, and the length and the width of the door panel (18) are larger than those of the repair window (17).

5. The water changing device with the flow regulating structure and capable of preventing backflow according to claim 1, wherein: the inside of door plant (18) is provided with down stay cord (181) and last stay cord (182), and the end department of stay cord (181) links to each other with the up end of filter screen (20) down to go up stay cord (182) and link to each other through the edge of horizontal pole (183) and filter screen (20).

6. The water changing device with the flow regulating structure and capable of preventing backflow as claimed in claim 5, wherein: the two ends of the cross rod (183) are respectively connected with the water changing tank (2) and the partition plate (5), the lower pull rope (181) and the upper pull rope (182) are both made of elastic materials, and the height of the cross rod (183) is lower than the lowest point of the valve block (12).

7. The water changing device with the flow regulating structure and capable of preventing backflow according to claim 1, wherein: the filter screen (20) passes through second supporting seat (22) and trades water tank (2) constitution revolution mechanic, and filter screen (20) are provided with two about the central axis symmetry of ram (13).

8. The water changing device with the flow regulating structure and capable of preventing backflow according to claim 1, wherein: the connecting plate (24) forms a sliding structure through the fixing plate (25) and the groove (26), and the connecting plate (24) and the filter screen (20) are vertically arranged.

9. The water changing device with the flow regulating structure and capable of preventing backflow according to claim 1, wherein: the adjusting rod (30) is in threaded connection with the device box (28), and the device box (28) and the drain pipe (27) are both obliquely arranged.