Variable-diameter central pipe for water distributor

Abstract

The utility model discloses a diameter-variable central pipe for a water distributor, which relates to the technical field of sewage equipment and comprises a first barrel, a second barrel, an adjusting component and a water diversion component, and the first barrel is provided with a water inlet end and a water outlet end; the second barrel body comprises at least two arc-shaped barrel walls and a plurality of arc-shaped movable plates, the barrel walls are arranged in a surrounding mode in the circumferential direction, the movable plates are arranged between every two adjacent barrel walls, the side walls of the movable plates are inserted into the side walls of the barrel walls, the barrel walls and the movable plates are jointly spliced to form the second barrel body, and the second barrel body is arranged on the inner side of the first barrel body; the adjusting assembly is connected with the cylinder wall and used for moving the cylinder wall in the radial direction to change the inner diameter of the second cylinder body. The water diversion assembly is arranged at the water inlet end of the first barrel and covers the gap between the first barrel and the second barrel. According to the variable-diameter central pipe for the water distributor, the pipe diameter can be adjusted along with the change of the water quantity of a pulse type water distributor, and the water distribution requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage equipment technical field, especially a variable diameter center tube for water distributor. BACKGROUND

[0002] The water distributor used in the sewage treatment system generally has a bell jar type pulse water distributor, and the bell jar type pulse water distributor mainly comprises a cover body, a center tube and a siphon breaking pipe. When the water level in the cover body rises and gradually submerges the water inlet end above the center tube, water is discharged through the center tube to form a siphon effect. After the siphon effect is formed, the water in the cover body is quickly discharged from the center tube, and the water level in the cover body drops until it reaches the pipe opening of the siphon breaking pipe. The siphon effect is destroyed, and the center tube no longer discharges water flow. The water level in the cover body rises again.

[0003] However, in some cases, it is necessary to adjust the water quantity of the water distributor for one-time water distribution. If the water distribution quantity of the water distributor is adjusted to increase, and the center tube is not adjusted, the pipe diameter of the center tube will limit the discharge of water flow, affecting the water distribution quantity. If the water distribution quantity of the water distributor is adjusted to decrease, and the center tube is not adjusted, for small flow, the large pipe diameter of the center tube may cause the siphon effect to be unable to be formed, and the siphon pulse water distribution cannot be realized. SUMMARY

[0004] The utility model aims at at least solves one of prior art existing technical problems. For this reason, the utility model provides a variable diameter center tube for water distributor, can adjust pipe diameter along with water quantity change of pulse water distributor, satisfies water distribution demand.

[0005] The variable diameter center tube for water distributor according to the utility model embodiment comprises a first cylinder body, the first cylinder body has a water inlet end and a water outlet end;

[0006] A second cylinder body comprises at least two arc-shaped cylinder walls and a plurality of arc-shaped movable plates. The plurality of cylinder walls are circumferentially arranged, and the movable plates are arranged between the adjacent two cylinder walls. The side walls of the movable plates are inserted into the side walls of the cylinder walls. The plurality of cylinder walls and the plurality of movable plates jointly form the second cylinder body. The second cylinder body is arranged on the inner side of the first cylinder body;

[0007] An adjusting assembly is connected with the cylinder wall, and is used for moving the cylinder wall in the radial direction to change the inner diameter of the second cylinder body;

[0008] A water guiding assembly is arranged at the water inlet end of the first cylinder body, and covers the gap between the first cylinder body and the second cylinder body.

[0009] The variable-diameter central pipe for the water distributor has at least the following beneficial effects: the adjusting assembly can move the cylinder wall position radially, the inner diameter of the second cylinder body can be changed, the water flow passes through the water guide assembly only from the second cylinder body, and the inner diameter of the second cylinder body can be changed with the water volume of the water distributor, thereby meeting the water distribution requirement.

[0010] According to some embodiments of the present application, the cylinder wall is provided with a groove parallel to the axial side wall, the groove is provided with a sealing structure, and the side wall of the movable plate is inserted into the groove and in contact with the sealing structure.

[0011] According to some embodiments of the present application, two rubber strips are arranged in each groove along the axial direction of the cylinder wall, the two rubber strips are attached to a pair of opposite wall surfaces of the groove, the side wall of the movable plate is inserted between the two rubber strips, and the surface of the movable plate is in abutment with the rubber strips.

[0012] According to some embodiments of the present application, the water guide assembly includes a plurality of water guide plates, the plurality of water guide plates are distributed on the end portion of the same end of the first cylinder body and the second cylinder body along the circumferential direction of the first cylinder body, one side of the water guide plate is pivotally connected with the first cylinder body, the other side of the water guide plate is lapped on the end portion of the second cylinder body, and the adjacent two water guide plates are lapped with each other.

[0013] According to some embodiments of the present application, the first cylinder body is provided with a first rotary driving device, the first rotary driving device is connected with the water guide plate, and the first rotary driving device is configured to push the water guide plate to overturn from the outside of the first cylinder body to the inside of the first cylinder body.

[0014] According to some embodiments of the present application, a torsional spring is arranged between the water guide plate and the first cylinder body, and the torsional spring is located on the rotation shaft of the water guide plate.

[0015] According to some embodiments of the present application, the water guide assembly includes at least four water guide plates, and the plurality of water guide plates include the same number of upper water guide plates and lower water guide plates, the upper water guide plates and the lower water guide plates are alternately distributed along the circumferential direction of the first cylinder body, and the two sides of the upper water guide plate are respectively lapped above the lower water guide plate.

[0016] According to some embodiments of the present application, the adjusting assembly includes a plurality of fixed members and a plurality of movable members, the plurality of fixed members are arranged on the outer side wall of the first cylinder body along the circumferential direction of the first cylinder body, the outer side wall of each cylinder wall is provided with the movable member, the movable member is movably connected with the fixed member through the first cylinder body, and the movable member can move radially along the first cylinder body.

[0017] According to some embodiments of the present application, the second cylinder is provided with a plurality of water baffles at one end close to the water outlet end of the first cylinder, the plurality of water baffles are distributed along the circumference of the first cylinder, one side of the water baffle is pivotally connected with the second cylinder, the other side of the water baffle abuts against the inner side wall of the first cylinder, the water baffle is connected with a second rotary driving device, and the second rotary driving device is configured to push the water baffle to overturn from the inner side of the second cylinder to the outer side of the second cylinder.

[0018] According to some embodiments of the present application, the water outlet end of the first cylinder is provided with a flange part.

[0019] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in combination with the drawings and embodiments, in which:

[0021] Figure 1 It is an internal structure schematic view of the variable-diameter central pipe for the water distributor according to the embodiments of the present application;

[0022] Figure 2 It is a structure schematic view of the variable-diameter central pipe for the water distributor according to the embodiments of the present application;

[0023] Figure 3 It is a structure schematic view of the second cylinder according to the embodiments of the present application;

[0024] Figure 4 It is a structure schematic view of the cylinder wall and the groove according to the embodiments of the present application;

[0025] Figure 5 It is a structure schematic view of the water guide plate according to the embodiments of the present application;

[0026] Figure 6 It is a structure schematic view of the variable-diameter central pipe for the water distributor according to the embodiments of the present application;

[0027] Figure 7 It is a cross-sectional structure schematic view of the variable-diameter central pipe for the water distributor according to the embodiments of the present application.

[0028] LIST OF REFERENCE NUMBERS

[0029] The first barrel body 100, the flange part 110, the second barrel body 200, the barrel wall 210, the groove 211, the rubber strip 212, the movable plate 220, the adjusting assembly 300, the fixing piece 310, the movable piece 320, the water guide assembly 400, the water guide plate 410, the first rotary driving device 500, the water baffle 600, and the second rotary driving device 700. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0031] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0032] In the description of the present application, plural means more than two. If there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0033] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0034] The water distributor used in the sewage treatment system generally has a bell-shaped pulse water distributor, and the bell-shaped pulse water distributor mainly comprises a cover body, a central pipe and a siphon breaking pipe. The water level in the cover body rises, gradually submerging the water inlet end above the central pipe, and the water is discharged through the central pipe to form a siphon effect. After the siphon effect is formed, the water in the cover body is quickly discharged from the central pipe, and the water level in the cover body drops until it drops to the pipe opening of the siphon breaking pipe. The siphon effect is destroyed, the central pipe no longer discharges water flow, and the water level in the cover body rises again.

[0035] However, in some cases, the water flow of the water distributor needs to be adjusted. If the water flow of the water distributor is adjusted to increase, and the central pipe is not adjusted, the pipe diameter of the central pipe will limit the water flow, affecting the water flow. If the water flow of the water distributor is adjusted to decrease, and the central pipe is not adjusted, for small flow, the larger pipe diameter of the central pipe may cause the siphon effect to fail to form, and the siphon pulse water distribution cannot be realized.

[0036] The sewage treatment facility contains a hydrolysis acidification tank, which is a tank that uses a method between aerobic and anaerobic treatment to treat sewage. The combination of the hydrolysis acidification tank and other processes can reduce the cost of sewage treatment and improve the treatment efficiency. The hydrolysis acidification tank has a sludge bed area and a clear water layer area. The sewage to be treated enters the tank and is quickly and uniformly mixed with the sludge bed. The bell-shaped pulse water distributor uses the rapid water flow in the siphon pipe to remove the air in the central pipe, forming a certain vacuum degree in the central pipe. Under the action of the atmospheric pressure inside and outside the pipe, the water in the cover enters the central pipe and is discharged into the hydrolysis acidification tank. Because the water flow speed of the central pipe is very fast, the water distribution can be completed in a short time, that is, the pulse water distribution effect is realized, which can stir the sludge at the bottom of the hydrolysis acidification tank. The anaerobic bacteria and organic matter in the sewage can fully contact and react.

[0037] Referring to Figure 1 and Figure 2 , an embodiment of the variable-diameter central pipe for the water distributor includes a first cylinder 100, a second cylinder 200, an adjusting assembly 300, and a water guiding assembly 400.

[0038] The first cylinder 100 has a water inlet end and a water outlet end. The first cylinder 100 is vertically arranged in the pulse water distributor, and the water inlet end of the first cylinder 100 is kept at the top and the water outlet end is kept at the bottom.

[0039] Referring to Figure 3 , the second cylinder 200 includes at least two arc-shaped cylinder walls 210 and a plurality of arc-shaped movable plates 220. The plurality of cylinder walls 210 are circumferentially arranged, and the movable plates 220 are arranged between adjacent two cylinder walls 210. The side walls of the movable plates 220 are inserted into the side walls of the cylinder walls 210. The plurality of cylinder walls 210 and the plurality of movable plates 220 jointly form the second cylinder 200, and the second cylinder 200 is arranged inside the first cylinder 100. The adjusting assembly 300 is connected with the cylinder walls 210, and the adjusting assembly 300 is used to move the cylinder walls 210 radially to change the inner diameter of the second cylinder 200.

[0040] Referring to Figure 6 and Figure 7As shown, the second cylinder 200 is inside the first cylinder 100, and water flows through the second cylinder 200 when the water distributor is working. The first cylinder 100 provides support for the second cylinder 200. The cylinder wall 210 can be moved radially by adjusting the adjusting assembly 300. Here, the radial direction can be the radial direction of the first cylinder 100 or the radial direction of the second cylinder 200. Since the second cylinder 200 is inside the first cylinder 100, the first cylinder 100 and the second cylinder 200 generally remain coaxial. By moving the cylinder wall 210, the inner diameter of the second cylinder 200 can be changed. When the water distributor needs to increase the water distribution amount, the cylinder wall 210 can be moved from inside to outside to expand the inner diameter of the second cylinder 200. When the water distributor needs to reduce the water distribution amount, the cylinder wall 210 can be moved from outside to inside to reduce the inner diameter of the second cylinder 200.

[0041] It should be understood that the change in the inner diameter of the second cylinder 200 will inevitably change the circumference of the second cylinder 200, and the cylinder wall 210 has a fixed arc length. Therefore, a movable plate 220 needs to be arranged between adjacent two cylinder walls 210 to make up for the change in the circumference. For example, when the inner diameter of the second cylinder 200 increases, the spacing between adjacent two cylinder walls 210 increases, the part of the movable plate 220 inserted into the side wall of the cylinder wall 210 is moved out, and the movable plate 220 and the cylinder wall 210 still maintain the shape of the second cylinder 200. When the inner diameter of the second cylinder 200 decreases, the spacing between adjacent two cylinder walls 210 decreases, the exposed part of the movable plate 220 is further inserted into the side wall of the cylinder wall 210, and the movable plate 220 and the cylinder wall 210 continue to maintain the shape of the second cylinder 200.

[0042] The water guide assembly 400 is arranged at the water inlet end of the first cylinder 100, and the water guide assembly 400 covers the gap between the first cylinder 100 and the second cylinder 200.

[0043] It should be understood that since only the inner diameter of the second cylinder 200 changes with the water amount of the water distributor, only when the water flows through the second cylinder 200, the changed inner diameter of the second cylinder 200 has an effect. The inner diameter of the first cylinder 100 does not change, the second cylinder 200 is arranged inside the first cylinder 100, and there is a gap between the second cylinder 200 and the first cylinder 100. When the inner diameter of the second cylinder 200 changes, the size of the gap between the second cylinder 200 and the first cylinder 100 also changes. The function of the water guide assembly 400 is to guide the water flow from the water inlet end of the first cylinder 100 into the second cylinder 200, so that the water flow mainly flows through the second cylinder 200, rather than flowing into the gap between the first cylinder 100 and the second cylinder 200.

[0044] Reference Figure 4As shown, it can be understood that the barrel wall 210 is provided with a groove 211 parallel to the axial direction, and the groove 211 is provided with a sealing structure. The side wall of the movable plate 220 is inserted into the groove 211 and in contact with the sealing structure.

[0045] Parallel to the axial direction means parallel to the axial direction of the second barrel 200. The groove 211 of the barrel wall 210 is for inserting the movable plate 220, and the sealing structure in the groove 211 is in contact with the movable plate 220 to prevent the water flowing in the second barrel 200 from overflowing between the barrel wall 210 and the movable plate 220, and to avoid the water overflowing into the gap or space between the first barrel 100 and the second barrel 200 as much as possible.

[0046] Preferably, the sealing structure is composed of a rubber strip 212.

[0047] It can be understood that two rubber strips 212 are arranged in each groove 211, and the rubber strips 212 are arranged along the axial direction of the barrel wall 210. The two rubber strips 212 are attached to a set of opposite wall surfaces of the groove 211, the side wall of the movable plate 220 is inserted between the two rubber strips 212, and the surface of the movable plate 220 is in abutment with the rubber strips 212.

[0048] When the barrel wall 210 is pulled to move, the movable plate 220 and the barrel wall 210 move relatively, and the movable plate 220 and the rubber strips 212 slide relatively. The more the movable plate 220 is inserted into the groove 211, the more the contact area between the movable plate 220 and the rubber strips 212, and the better the sealing performance. It should be understood that when the inner diameter of the second barrel 200 increases, a part of the movable plate 220 needs to be moved out of the groove 211, but at this time, a part of the movable plate 220 is still in the groove 211 and in contact with the rubber strips 212. The sealing performance between the rubber strips 212 and the movable plate 220 will decrease, but a certain sealing effect can still be achieved to prevent water from overflowing and leaking between the movable plate 220 and the barrel wall 210.

[0049] Referring to Figure 5 As shown, it can be understood that the water guide assembly 400 includes a plurality of water guide plates 410, which are distributed along the circumferential direction of the first barrel 100 at the end of the same end of the first barrel 100 and the second barrel 200. One side of the water guide plate 410 is pivotally connected to the first barrel 100, the other side of the water guide plate 410 is lapped on the end of the second barrel 200, and the adjacent two water guide plates 410 are lapped on each other.

[0050] In the height direction, the end of the second cylinder 200 can be slightly lower than the height of the first cylinder 100, that is, the end face of the cylinder wall 210 is lower than the end face of the first cylinder 100. At this time, the guide plate 410 is inclined downward to the center direction of the first cylinder 100 and is lapped on the end face of the cylinder wall 210. When the inner diameter of the second cylinder 200 changes, the radial position of the cylinder wall 210 changes synchronously, and the slope of the guide plate 410 also changes, so the guide plate 410 needs to be pivotally connected with the first cylinder 100 to ensure that the guide plate 410 can always be lapped on the end face of the cylinder wall 210, that is, the guide plate 410 introduces the water flow from the water inlet end of the first cylinder 100 into the second cylinder 200. Since the size of the guide plate 410 cannot be adjusted, and the guide plate 410 also needs to be rotated, the adjacent two guide plates 410 are lapped with each other to solve the problem that a gap may be generated between the guide plates 410.

[0051] In the above structure, the end face of the second cylinder 200 is lower than the height of the end face of the first cylinder 100, so the guide plate 410 is rotated downward, and the guide plate 410 can maintain the downward rotating trend due to its own gravity to be lapped on the end face of the second cylinder 200.

[0052] It can be understood that the first cylinder 100 is provided with a first rotating driving device 500, the first rotating driving device 500 is connected with the guide plate 410, and the first rotating driving device 500 is configured to push the guide plate 410 to overturn from the outside of the first cylinder 100 to the inside of the first cylinder 100.

[0053] The first rotating driving device 500 is used to improve the reliability of the lapping of the guide plate 410 and the end face of the second cylinder 200. The second cylinder 200 is located on the inside of the first cylinder 100, so the first rotating driving device 500 is needed to push the guide plate 410 to overturn from the outside of the first cylinder 100 to the inside of the first cylinder 100.

[0054] It can be understood that a torsion spring is arranged between the guide plate 410 and the first cylinder 100, and the torsion spring is located on the rotating shaft of the guide plate 410.

[0055] A specific embodiment of the first rotating driving device 500 is to use a torsion spring. When the torsion spring is installed, a certain amount of torsional deformation is applied to the torsion spring, and the torsion spring will have a reverse torsion trend. A plurality of torsion springs can be arranged on one guide plate 410 along the rotating shaft.

[0056] It can be understood that the guide assembly 400 includes at least four guide plates 410, and the plurality of guide plates 410 include the same number of upper guide plates and lower guide plates, the upper guide plates and the lower guide plates are alternately distributed along the circumference of the first cylinder 100, and the two sides of the upper guide plate are lapped above the lower guide plate, respectively.

[0057] The number of upper guide plates and lower guide plates included in the plurality of guide plates 410 is the same, that is, the number of guide plates 410 is an even number. In some cases, the lapping manner between the guide plates 410 can be head-to-tail lapping, that is, the tail end of the previous guide plate 410 is lapped above the head end of the next guide plate 410. With such a lapping manner, each guide plate 410 is placed obliquely, and the contact area between two guide plates 410 is small. When the number of guide plates 410 is set to be an even number, the guide plates 410 are divided into an equal number of upper guide plates and lower guide plates, the upper guide plates are arranged above the lower guide plates, and the upper guide plates and the lower guide plates are alternately distributed, so that each guide plate 410 can be placed horizontally, the contact area between adjacent two guide plates 410 is larger, no gap is generated at the lapping position, and the guide effect is better. When the arrangement manner of the upper guide plate and the lower guide plate is adopted, if the No. 1 position is an upper guide plate, the No. 2 position is a lower guide plate, the No. 3 position is an upper guide plate, and the No. 4 position is a lower guide plate, the lower guide plate at the No. 2 position is flanked by upper guide plates, and the upper guide plates are lapped on the upper surfaces of the two sides of the lower guide plate. Since the first cylinder body 100 is circular, in the case of four guide plates 410, the No. 4 position and the No. 1 position are adjacent positions, that is, one side of the lower guide plate at the No. 4 position is the upper guide plate at the No. 1 position, and the other side is the upper guide plate at the No. 3 position.

[0058] Referring to FIG. 3, Figure 7 It can be understood that the adjusting assembly 300 includes a plurality of fixed members 310 and a plurality of movable members 320. The plurality of fixed members 310 are arranged on the outer side wall of the first cylinder body 100 along the circumference of the first cylinder body 100. The outer side wall of each cylinder wall 210 is provided with a movable member 320, and the movable member 320 is movably connected to the fixed member 310 through the first cylinder body 100. The movable member 320 can move along the radial direction of the first cylinder body 100.

[0059] Specifically, the movable member 320 can be a threaded rod, one end of the threaded rod away from the cylinder wall 210 is provided with a handle, and the other end is connected to the cylinder wall 210. The cylinder wall 210 and the threaded rod are movably connected, and the movable connection here means that the threaded rod can rotate along the circumference of itself, but in the axial direction of the threaded rod, it remains relatively stationary with the cylinder wall 210. The threaded rod is threadedly connected to the fixed member 310. When the threaded rod is rotated by the handle, the threaded rod can move axially to push the cylinder wall 210 to change the inner diameter of the second cylinder body 200. In other embodiments, the movable member 320 can also be directly slidably connected to the fixed member 310, and the cylinder wall 210 is moved by pushing and pulling the movable member 320.

[0060] It can be understood that the second cylinder body 200 is provided with a plurality of water baffle plates 600 at one end close to the water outlet end of the first cylinder body 100, the plurality of water baffle plates 600 are distributed along the circumference of the first cylinder body 100, one side of the water baffle plate 600 is pivotally connected with the second cylinder body 200, the other side of the water baffle plate 600 abuts against the inner side wall of the first cylinder body 100, the water baffle plate 600 is connected with a second rotary driving device 700, and the second rotary driving device 700 is configured to push the water baffle plate 600 to overturn from the inner side of the second cylinder body 200 to the outer side of the second cylinder body 200.

[0061] Since the second cylinder body 200 is located at the inner side of the first cylinder body 100, the water baffle plate 600 is overturned from the inner side of the second cylinder body 200 to the outer side of the second cylinder body 200, so that the water baffle plate 600 can abut against the inner side wall of the first cylinder body 100. The water baffle plate 600 is located between the outer side of the second cylinder body 200 and the inner side of the first cylinder body 100, and is used to block the water flow between the first cylinder body 100 and the second cylinder body 200. In addition, the water baffle plate 600 is pushed by the second rotary driving device 700 and abuts against the inner side wall of the first cylinder body 100, and can also play a role of centering the second cylinder body 200, so as to ensure that the end of the second cylinder body 200 is located at the center position of the first cylinder body 100.

[0062] It can be understood that the water outlet end of the first cylinder body 100 is provided with a flange part 110.

[0063] The flange part 110 is used to connect an external water outlet pipeline.

[0064] The above describes the embodiments of the utility model in detail in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A variable diameter central tube for a water distributor, characterized in that: include: A first cylinder (100), the first cylinder (100) having a water inlet end and a water outlet end; a second cylinder (200), the second cylinder (200) comprising at least two arc-shaped cylinder walls (210) and a plurality of arc-shaped movable plates (220), the plurality of cylinder walls (210) being circumferentially arranged, and the movable plates (220) being provided between two adjacent cylinder walls (210), the side walls of the movable plates (220) being inserted into the side walls of the cylinder walls (210), the plurality of cylinder walls (210) and the plurality of movable plates (220) being assembled together to form the second cylinder (200), and the second cylinder (200) being provided on the inner side of the first cylinder (100); an adjusting assembly (300), the adjusting assembly (300) being connected to the cylinder wall (210), and the adjusting assembly (300) being used to radially move the cylinder wall (210) to change the inner diameter of the second cylinder (200); A water diversion assembly (400) is provided at the water inlet end of the first cylinder (100), and the water diversion assembly (400) covers the gap between the first cylinder (100) and the second cylinder (200).

2. The variable diameter central tube for a water distributor according to claim 1, characterized in that: A groove (211) is formed on the side wall of the cylinder wall (210) parallel to the axial direction, a sealing structure is provided in the groove (211), and the side wall of the movable plate (220) is inserted into the groove (211) and contacts the sealing structure.

3. The variable diameter central tube for a water distributor according to claim 2, characterized in that: Two rubber strips (212) are provided in each of the grooves (211). The rubber strips (212) are arranged along the axial direction of the cylinder wall (210). The two rubber strips (212) are attached to a set of opposite wall surfaces of the groove (211). The side wall of the movable plate (220) is inserted between the two rubber strips (212), and the surface of the movable plate (220) is in contact with the rubber strips (212).

4. The variable diameter central tube for a water distributor according to claim 1, characterized in that: The water diversion assembly (400) comprises a plurality of water diversion plates (410), wherein the plurality of water diversion plates (410) are distributed along the circumference of the first cylinder (100) at the ends of the same end of the first cylinder (100) and the second cylinder (200), one side of the water diversion plate (410) is pivotally connected to the first cylinder (100), and the other side of the water diversion plate (410) is overlapped with the end of the second cylinder (200), and two adjacent water diversion plates (410) are overlapped with each other.

5. The variable diameter central tube for a water distributor according to claim 4, characterized in that: The first cylinder (100) is provided with a first rotation driving device (500), the first rotation driving device (500) being connected to the water guide plate (410), and the first rotation driving device (500) being configured to push the water guide plate (410) to flip from the outside of the first cylinder (100) toward the inside of the first cylinder (100).

6. The variable diameter central tube for a water distributor according to claim 5, characterized in that: A torsion spring is provided between the water guide plate (410) and the first cylinder (100), and the torsion spring is located on the rotation axis of the water guide plate (410).

7. The variable diameter central tube for a water distributor according to claim 4, characterized in that: The water diversion assembly (400) comprises at least four water diversion plates (410), and the plurality of water diversion plates (410) comprise an equal number of upper water diversion plates and lower water diversion plates, the upper water diversion plates and the lower water diversion plates being alternately distributed, and along the circumference of the first cylinder (100), both sides of the upper water diversion plates are respectively overlapped above the lower water diversion plates.

8. The variable diameter central tube for a water distributor according to claim 1, characterized in that: The adjustment assembly (300) includes a plurality of fixed parts (310) and a plurality of movable parts (320). The plurality of fixed parts (310) are arranged on the outer wall of the first cylinder (100) along the circumference of the first cylinder (100). The outer wall of each cylinder wall (210) is provided with the movable part (320), and the movable part (320) passes through the first cylinder (100) and is movably connected to the fixed parts (310). The movable part (320) can move along the radial direction of the first cylinder (100).

9. The variable diameter central tube for a water distributor according to claim 1, characterized in that: A plurality of water baffles (600) are provided at one end of the second cylinder (200) close to the water outlet end of the first cylinder (100), and the plurality of water baffles (600) are distributed along the circumference of the first cylinder (100). One side of the water baffle (600) is pivotally connected to the second cylinder (200), and the other side of the water baffle (600) abuts against the inner wall of the first cylinder (100). The water baffle (600) is connected to a second rotation drive device (700), and the second rotation drive device (700) is configured to push the water baffle (600) to flip from the inner side of the second cylinder (200) toward the outer side of the second cylinder (200).

10. The variable diameter central tube for a water distributor according to claim 1, characterized in that: The water outlet end of the first cylinder (100) is provided with a flange portion (110).

Images