Crack prevention structure

Abstract

The invention provides a crack prevention structure, and relates to the field of road and bridge construction, the crack prevention structure comprises a water supply ring, the water supply ring is rotatably connected to the outside of a water supply supporting pipe, and the problems that the use angle of a nozzle of a watering maintenance truck used for road and bridge construction is fixed and cannot be adjusted, the spraying distance of the watering truck is fixed, the watering coverage is small, and the maintenance efficiency is low are solved. The problems that in the prior art, the roadbed and pavement maintenance effect is poor are solved, each single control assembly can achieve the water spraying maintenance function, the spraying angles of the single control assemblies can be freely adjusted for use, and therefore the single control assemblies are arranged to be different spraying angles, the multi-angle covering maintenance spraying mode is achieved, use is flexible and convenient, and the maintenance efficiency is improved. The device can adapt to maintenance of different conditions in road and bridge construction, the use angle of the single control assembly can be independently adjusted and can also be uniformly adjusted through the unified adjustment assembly, and switching adjustment is rapid.

Description

Technical Field

[0001] This invention relates to the field of road and bridge construction technology, and in particular to a crack prevention structure. Background Technology

[0002] During the construction of roads and bridges, it is necessary to water the roadbed and pavement immediately after construction to prevent cracks from appearing and affecting subsequent construction and quality. Currently, the maintenance of roadbed and pavement is mostly achieved by moving water spraying vehicles on the roadbed and pavement. When moving, the water spraying vehicle can spray water from the water tank onto the roadbed and pavement through nozzles, thereby achieving the maintenance operation of the roadbed and pavement.

[0003] However, the water spraying and maintenance vehicles currently used in road and bridge construction have fixed nozzle angles that cannot be adjusted, resulting in a fixed spraying distance, small water coverage, and poor maintenance effect on the roadbed and pavement. If the maintenance of the roadbed and pavement is not in place, cracks may appear. The vehicles are not very flexible or practical. Summary of the Invention

[0004] In view of this, the present invention provides a crack prevention structure, which has individual control components and a unified adjustment component. Each individual control component can realize the function of water spraying maintenance, and the spray angle of the individual control component can be freely adjusted. Thus, by setting the individual control components to different spray angles, a multi-angle coverage maintenance spraying method is realized. It is flexible and convenient to use and can adapt to different maintenance situations in road and bridge construction. The usage angle of the individual control component can be adjusted individually or uniformly through the unified adjustment component. The switching adjustment is fast, and the flexibility, adaptability and practicality are extremely strong.

[0005] This invention provides a crack prevention structure, specifically comprising: an installation assembly, which includes a water supply support pipe, a connecting frame, and a mounting plate. The two ends of the connecting frame are respectively fixedly connected to the bottom of the water supply support pipe and the side of the mounting plate, and the mounting plate is fixedly installed at the rear of a maintenance vehicle. The water supply support pipe is connected to the water tank of the maintenance vehicle via a connecting water pipe. A single-control assembly includes a water supply ring, a positioning rod, a positioning block, a switching block, and a maintenance nozzle. The water supply ring is rotatably connected to the outside of the water supply support pipe, and the positioning rod is rotatably connected to the water supply support pipe. On the side of the pipe, the positioning block is inserted into the outside of the positioning rod, and the side of the positioning block abuts against the side of the water supply ring. The switching block is inserted into the inside of one end of the positioning rod, and the maintenance nozzle is fixedly installed on the side of the water supply ring. The overall adjustment assembly includes an adjusting worm gear, a main control rod, and a positioning worm wheel. The adjusting worm gear is rotatably connected to the side of the water supply support pipe, and the main control rod is rotatably connected to the side of the water supply support pipe. The positioning worm wheel is fixedly installed on one end of the main control rod, and the positioning worm wheel is drively connected to the adjusting worm gear. The rod body of the main control rod passes through the inside of the positioning rod.

[0006] Furthermore, the water supply support pipe has a water supply channel inside, and a connection notch is provided on the side of the water supply channel. The water supply ring is installed at the connection notch of the water supply support pipe.

[0007] Furthermore, the single control component is provided with four sets on the outside of the water supply support pipe, and the number is not limited to four sets, but can be increased or decreased.

[0008] Furthermore, the side of the water supply ring is provided with a spiral positioning groove, and the side of the positioning block is provided with a positioning protrusion, which is inserted into the inside of the positioning groove.

[0009] Furthermore, the positioning rod has a bidirectional threaded section in the middle of its body, and the positioning block has a limiting threaded groove inside, which is threadedly engaged with the bidirectional threaded section.

[0010] Furthermore, the positioning block is provided with connecting springs on both sides, and the connecting springs are sleeved on the outside of the positioning rod. The two ends of the connecting springs are respectively fixedly connected to the side of the positioning block and the side of the water supply support pipe.

[0011] Furthermore, the main control lever has a synchronizing gear on its outer side and a synchronizing tooth groove inside the switching block, with the synchronizing tooth groove inserted into the inside of the synchronizing gear.

[0012] Furthermore, the side of the switching block is provided with a synchronous top spring, and the two ends of the synchronous top spring abut against the side of the switching block and the side of the positioning rod, respectively.

[0013] Furthermore, the side of the switching block is provided with a synchronization post with a regular polygonal cross-section, and the side of the positioning rod is provided with a synchronization groove, with the synchronization post inserted into the inside of the synchronization groove.

[0014] Beneficial effects

[0015] 1. When in use, each set of individual control components can realize the function of water spraying and maintenance. The spray angle of the individual control components can be freely adjusted. By setting the individual control components to different spray angles, a multi-angle coverage maintenance spraying method is achieved. It is flexible and convenient to use and can adapt to different maintenance situations in road and bridge construction. The usage angle of the individual control components can be adjusted individually or uniformly through the unified adjustment component. The switching and adjustment are fast, which improves the flexibility, adaptability and practicality of the device.

[0016] 2. The maintenance nozzles can obtain water from the water tank of the maintenance vehicle, thereby enabling maintenance operations on the roadbed and pavement. The water inside the water tank of the maintenance vehicle can enter the water supply channel through the connecting pipe, and then enter the maintenance nozzles of the water supply ring through the connection gap of the water supply channel, realizing the spraying and maintenance of water. It is convenient, flexible and easy to operate.

[0017] 3. The operating angle of each individual control component can be uniformly adjusted via the adjusting worm gear, enabling rapid control of the operating angle of all individual control components. In the reset state, under the action of the synchronous top spring, the synchronous groove of the switching block is always inserted into the synchronous gear. Therefore, when the adjusting worm gear is rotated, it drives the positioning worm wheel to rotate, which in turn drives the main control rod to rotate. When the main control rod rotates, the synchronous gear drives the switching block to rotate synchronously through the synchronous groove. When the switching block rotates, the synchronous column drives the positioning rod to rotate through the synchronous groove. When the positioning rod rotates, the bidirectional threaded section drives the positioning block to move through the limit thread groove. When the positioning block moves, the positioning protrusion drives the water supply ring to rotate through the positioning groove, thereby changing the operating angle of all individual control components. This operation is convenient and the adjustment is rapid.

[0018] 4. The individual control components can be adjusted independently and without interference. Adjusting the individual control components to different spraying angles can increase the water coverage area, improve the maintenance effect of the roadbed and pavement, and effectively prevent the occurrence of cracks in the roadbed and pavement. When it is necessary to adjust any individual control component, simply press the switching block axially to disengage the synchronous tooth groove from the synchronous gear. Then, the positioning rod of that group of individual control components can rotate independently of the overall adjustment component. The overall adjustment component adopts a worm gear transmission adjustment, so when that group of individual control components is adjusted, it will not drive the other individual control components to rotate synchronously, thus ensuring the stability of the other individual control components in use, with extremely high stability.

[0019] 5. When the switching block of any single-control component is pressed, rotating the switching block will drive the positioning rod of that single-control component to rotate. As the positioning rod rotates, it can change the operating angle of the water supply ring and the maintenance nozzle through the positioning block. The single-control component has a limiting structure. When the positioning block moves to its maximum distance (whether left or right), the limiting thread groove can disengage from the bidirectional threaded section, thus releasing the threaded engagement. Afterward, even if the positioning rod continues to rotate in the same direction, it will not cause the positioning block to move, preventing the device from jamming. Furthermore, when the positioning rod rotates in the opposite direction, the connecting springs on both sides of the positioning block provide a pulling force towards the bidirectional threaded section, allowing the limiting thread groove to engage with the bidirectional threaded section again after the positioning rod reverses, thus adjusting the operating angle of the maintenance nozzle. The adjustment is quick and the operation is stable.

[0020] 6. Due to the design of the limiting structure of the individual control components, even if the usage angles of the individual control components are different, the reset operation of the individual control components can still be achieved through the unified adjustment component (that is, adjusting the spraying angle of the maintenance nozzle to the maximum upward or downward angle). When it is necessary to reset all individual control components, simply rotate the adjusting worm gear continuously in the same direction. The adjusting worm gear can drive the water supply rings of all individual control components to rotate upward or downward (the rotation direction of the water supply rings depends on the rotation direction of the adjusting worm gear). The water supply ring that reaches the maximum adjustment position first will trigger the limiting function to prevent the device from jamming. Thus, by continuously rotating the adjusting worm gear in the same direction, all individual control components can be adjusted to the reset state (i.e., the maximum upward or downward angle of the maintenance nozzle). The adjustment is convenient and highly adaptable. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0022] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0023] In the attached diagram:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is the present invention. Figure 1 Enlarged structural diagram of part A in the middle.

[0026] Figure 3 This is the present invention. Figure 1 Internal structural diagram.

[0027] Figure 4 This is the present invention. Figure 3 Enlarged structural diagram of part B in the middle.

[0028] Figure 5 This is a schematic diagram of the disassembled single-control component of the present invention.

[0029] Figure 6 This is a schematic diagram of the water supply ring of the present invention.

[0030] Figure 7 This is a schematic diagram of the internal structure of the water supply support pipe and the overall control component after disassembly.

[0031] Figure 8 This is a schematic diagram of the internal structure of the maintenance nozzle of the single-control component when the switching block is pressed to adjust the usage angle of the nozzle.

[0032] Figure 9 This is a schematic diagram of the internal structure of the maintenance nozzle of the present invention when the use angle of the single control component is adjusted by the unified adjustment component.

[0033] Figure 10 This is the present invention. Figure 7 Enlarged structural diagram of part C in the middle.

[0034] Figure 11 This is the present invention. Figure 8 Enlarged structural diagram of part D in the middle.

[0035] Figure 12 This is the present invention. Figure 9 Enlarged structural diagram of part E in the middle.

[0036] List of reference numerals

[0037] 1. Installation components; 101. Water supply support pipe; 1011. Water supply channel; 1012. Connection notch; 102. Connecting bracket; 103. Mounting plate; 2. Single control components; 201. Water supply ring; 2011. Positioning groove; 202. Positioning rod; 2021. Bidirectional threaded section; 2022. Synchronization groove; 203. Positioning block; 2031. Positioning protrusion; 2032. Limiting threaded groove; 2033. Connecting spring; 204. Switching block; 2041. Synchronization tooth groove; 2042. Synchronization top spring; 2043. Synchronization column; 205. Maintenance nozzle; 3. Overall adjustment components; 301. Adjusting worm gear; 302. Main control rod; 3021. Synchronization gear; 303. Positioning worm wheel. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0039] Example: Please refer to Figures 1 to 12 As shown:

[0040] This invention provides a crack prevention structure, including an installation component 1. The installation component 1 includes a water supply support pipe 101, a connecting frame 102, and a mounting plate 103. The two ends of the connecting frame 102 are fixedly connected to the bottom of the water supply support pipe 101 and the side of the mounting plate 103, respectively. The mounting plate 103 is fixedly installed at the rear of a maintenance vehicle. The water supply support pipe 101 is connected to the water tank of the maintenance vehicle via a connecting water pipe. A single-control component 2 includes a water supply ring 201, a positioning rod 202, a positioning block 203, a switching block 204, and a maintenance nozzle 205. The water supply ring 201 is rotatably connected to the outside of the water supply support pipe 101, and the positioning rod 202 is rotatably connected to the side of the water supply support pipe 101. Positioning block 203 is inserted into the outside of positioning rod 202, and the side of positioning block 203 abuts against the side of water supply ring 201. Switching block 204 is inserted into the inside of one end of positioning rod 202, and maintenance nozzle 205 is fixedly installed on the side of water supply ring 201. The overall adjustment component 3 includes adjusting worm gear 301, main control rod 302 and positioning worm wheel 303. Adjusting worm gear 301 is rotatably connected to the side of water supply support pipe 101, and main control rod 302 is rotatably connected to the side of water supply support pipe 101. Positioning worm wheel 303 is fixedly installed on one end of main control rod 302, and positioning worm wheel 303 is drively connected to adjusting worm gear 301. The rod body of main control rod 302 passes through the inside of positioning rod 202.

[0041] The water supply support pipe 101 has a water supply channel 1011 inside, and a connection notch 1012 is provided on the side of the water supply channel 1011. The water supply ring 201 is installed at the connection notch 1012 of the water supply support pipe 101. In use, the maintenance nozzle 205 can obtain water supply through the water tank of the maintenance vehicle, thereby realizing the maintenance construction operation of the roadbed and pavement. The water inside the water tank of the maintenance vehicle can enter the interior of the water supply channel 1011 through the connecting pipe, and then the water can enter the interior of the maintenance nozzle 205 of the water supply ring 201 through the connection notch 1012 of the water supply channel 1011, realizing the use of water spraying for maintenance. It is convenient and flexible to use and easy to operate.

[0042] The single control component 2 has four sets outside the water supply support pipe 101. The number of sets is not limited to four and can be increased or decreased. In use, the single control components 2 can be adjusted independently and without interference. Adjusting the single control components 2 to different spraying angles can increase the water coverage area, improve the maintenance effect of the roadbed and pavement, and effectively prevent the occurrence of cracks in the roadbed and pavement. When it is necessary to adjust any single control component 2 individually, simply press the switching block 204 axially to disengage the synchronous tooth groove 2041 from the outside of the synchronous gear 3021. Then, the positioning rod 202 of the single control component 2 can rotate independently of the overall adjustment component 3. The overall adjustment component 3 adopts a worm gear transmission adjustment, so when the single control component 2 is adjusted, it will not drive the other single control components 2 to rotate synchronously, thus ensuring the stability of the other single control components 2 in use. The stability is extremely strong.

[0043] The master control lever 302 has a synchronous gear 3021 on its outer side, and the switching block 204 has a synchronous tooth groove 2041 inside. The synchronous tooth groove 2041 is inserted into the synchronous gear 3021. In use, the operating angle of the individual control components 2 can be uniformly adjusted by adjusting the worm gear 301, thereby enabling rapid adjustment of the operating angle of all individual control components 2. The side of the switching block 204 has a synchronous top spring 2042, and the two ends of the synchronous top spring 2042 abut against the side of the switching block 204 and the fixed end, respectively. On the side of the position lever 202, in the reset state, under the action of the synchronous top spring 2042, the synchronous groove 2041 of the switching block 204 is always inserted into the synchronous gear 3021. Therefore, when the adjusting worm 301 is rotated, it drives the positioning worm wheel 303 to rotate. The rotation of the positioning worm wheel 303 drives the main control lever 302 to rotate. Thus, when the main control lever 302 rotates, the synchronous gear 3021 can drive the switching block 204 to rotate synchronously through the synchronous groove 2041. The side of the 4-positioning block 202 has a synchronizing post 2043 with a regular polygonal cross-section, and the side of the positioning rod 202 has a synchronizing groove 2022. The synchronizing post 2043 is inserted into the synchronizing groove 2022. When the switching block 204 rotates, the synchronizing post 2043 can drive the positioning rod 202 to rotate through the synchronizing groove 2022. The middle part of the positioning rod 202 has a bidirectional threaded section 2021, and the inside of the positioning block 203 has a limiting threaded groove 2032. The limiting threaded groove 2032 is threadedly engaged with the bidirectional threaded section 2021, thereby positioning. When the rod 202 rotates, the bidirectional threaded section 2021 can drive the positioning block 203 to move through the limiting threaded groove 2032. The side of the water supply ring 201 is provided with a spiral positioning groove 2011, and the side of the positioning block 203 is provided with a positioning protrusion 2031. The positioning protrusion 2031 is inserted into the inside of the positioning groove 2011. When the positioning block 203 moves, the positioning protrusion 2031 can drive the water supply ring 201 to rotate through the positioning groove 2011, thereby changing the operating angle of all single control components 2, which is convenient to operate and quick to adjust.

[0044] The positioning block 203 has connecting springs 2033 on both sides, and the connecting springs 2033 are sleeved on the outside of the positioning rod 202. The two ends of the connecting springs 2033 are fixedly connected to the side of the positioning block 203 and the side of the water supply support pipe 101, respectively. In use, when the switching block 204 of any single control component 2 is pressed, rotating the switching block 204 can drive the positioning rod 202 of the single control component 2 to rotate. Thus, when the positioning rod 202 rotates, it can change the water supply ring 201 and the maintenance nozzle 20 through the positioning block 203. The positioning block 203 is designed with a 5-degree angle of use and a limiting structure. When the positioning block 203 moves to its maximum distance (whether to the left or right), the limiting thread groove 2032 can disengage from the outside of the bidirectional thread section 2021, thus releasing the threaded engagement. Afterwards, even if the positioning rod 202 continues to rotate in the same direction, it will not cause the positioning block 203 to move, preventing the device from jamming or failing. Furthermore, when the positioning rod 202 rotates in the opposite direction at this time, the connecting springs 2033 on both sides of the positioning block 203 can provide a direction towards the bidirectional thread section for the positioning block 203. The pulling force in the 2021 direction allows the positioning rod 202 to reverse and the limiting thread groove 2032 to engage again with the bidirectional thread section 2021 to adjust the operating angle of the maintenance nozzle 205. The adjustment is quick and stable. Due to the design of the limiting structure of the single control component 2, even if the operating angles of the single control components 2 are different, the reset operation of the single control component 2 can still be achieved through the unified adjustment component 3 (that is, adjusting the spraying and maintenance angle of the maintenance nozzle 205 to the maximum upward or downward angle). When it is necessary to adjust all single control components... When component 2 is reset, simply rotate the adjusting worm 301 continuously in the same direction. The adjusting worm 301 can drive the water supply rings 201 of all single control components 2 to rotate upward or downward (the rotation direction of the water supply rings 201 depends on the rotation direction of the adjusting worm 301). The water supply rings 201 that reach the maximum adjustment position first will trigger the limit function to prevent the device from jamming. Thus, by continuously rotating the adjusting worm 301 in the same direction, all single control components 2 can be adjusted to the reset state (i.e., the maximum angle of the maintenance nozzles 205 facing upward or downward). The adjustment is convenient and highly adaptable.

[0045] The specific usage and function of this embodiment: In this invention, firstly, according to the actual maintenance needs of the roadbed and pavement, the spraying angle of the single control component 2 of the device is adjusted. The usage angle of the single control component 2 can be uniformly adjusted by adjusting the worm gear 301, thereby enabling rapid control of the usage angle of all single control components 2. In the reset state, under the action of the synchronous top spring 2042, the synchronous groove 2041 of the switching block 204 of the single control component 2 is always inserted into the inside of the synchronous gear 3021. Therefore, when the adjusting worm gear 301 is rotated, the adjusting worm gear 301 can drive the positioning worm wheel 303 to rotate. When the positioning worm wheel 303 rotates, it can drive the main control rod 302 to rotate. Thus, when the main control rod 302 rotates, the synchronous gear 3021 can be synchronized. The toothed groove 2041 drives the switching block 204 to rotate synchronously. When the switching block 204 rotates, the synchronous column 2043 can drive the positioning rod 202 to rotate through the synchronous groove 2022. Thus, when the positioning rod 202 rotates, the bidirectional threaded section 2021 can drive the positioning block 203 to move through the limiting threaded groove 2032. When the positioning block 203 moves, the positioning protrusion 2031 can drive the water supply ring 201 to rotate through the positioning groove 2011, thereby changing the operating angle of all single control components 2. The single control components 2 can be adjusted independently and without interference. Adjusting the single control components 2 to different spraying angles can increase the water coverage area, improve the maintenance effect of the roadbed and pavement, and effectively prevent the occurrence of cracks in the roadbed and pavement. When it is necessary to adjust any... When a single control component 2 is in use, simply pressing the switching block 204 axially causes the synchronous tooth groove 2041 to disengage from the synchronous gear 3021. This allows the positioning rod 202 of that single control component 2 to rotate independently of the overall adjustment component 3. The overall adjustment component 3 uses a worm gear transmission for adjustment, ensuring that the adjustment of that single control component 2 does not cause the other single control components 2 to rotate synchronously, thus guaranteeing the stability of the other single control components 2. When the switching block 204 of any single control component 2 is pressed, rotating the switching block 204 causes the positioning rod 202 of that single control component 2 to rotate. During rotation, the positioning rod 202 can change the operating angle of the water supply ring 201 and the maintenance nozzle 205 via the positioning block 203. Furthermore, the single control component 2 is designed with… With a limiting structure, when the positioning block 203 moves to its maximum distance (whether to the left or right), the limiting threaded groove 2032 can disengage from the outside of the bidirectional threaded section 2021, thus releasing the threaded engagement. Afterwards, even if the positioning rod 202 continues to rotate in the same direction, it will not cause the positioning block 203 to move, preventing the device from jamming. Furthermore, when the positioning rod 202 rotates in the opposite direction, the connecting springs 2033 on both sides of the positioning block 203 can provide a pulling force towards the bidirectional threaded section 2021, allowing the limiting threaded groove 2032 to engage with the bidirectional threaded section 2021 again after the positioning rod 202 reverses, thus adjusting the operating angle of the maintenance nozzle 205. Due to the design of the limiting structure of the single-control component 2,This allows the individual control components 2 to be reset even if their operating angles are different, via the unified adjustment component 3 (i.e., adjusting the spraying angle of the maintenance nozzle 205 to its maximum upward or downward angle). When all individual control components 2 need to be reset, simply rotate the adjusting worm gear 301 continuously in the same direction. The adjusting worm gear 301 will drive the water supply rings 201 of all individual control components 2 to rotate upward or downward (the rotation direction of the water supply rings 201 depends on the rotation direction of the adjusting worm gear 301). The water supply ring 201 that reaches its maximum adjustment position first will trigger the limit function to prevent the device from jamming. Thus, continuously rotating the adjusting worm gear 301 in the same direction will adjust all individual control components 2 to the reset state (i.e., the spraying angle of the maintenance nozzle 205 to its maximum angle). After adjusting the water level (maximum angle of head 205 pointing upwards or downwards), the maintenance vehicle can be started, and the water inside the water tank can be pumped into the water supply support pipe 101 to achieve the water spraying and maintenance operation of the roadbed and pavement. The specific structure and working principle of the maintenance vehicle and its water tank accessories are existing mature technologies and will not be elaborated here. The maintenance nozzle 205 can obtain water supply through the water tank of the maintenance vehicle, thereby realizing the maintenance operation of the roadbed and pavement. The water inside the water tank of the maintenance vehicle can enter the water supply channel 1011 through the connecting pipe, and then the water can enter the maintenance nozzle 205 of the water supply ring 201 through the connection gap 1012 of the water supply channel 1011 to realize the maintenance operation of the roadbed and pavement.

Claims

1. A crack prevention structure, characterized in that, include: The installation assembly (1) includes a water supply support pipe (101), a connecting frame (102), and a mounting plate (103). The two ends of the connecting frame (102) are fixedly connected to the bottom of the water supply support pipe (101) and the side of the mounting plate (103), respectively. The mounting plate (103) is fixedly installed at the rear of the maintenance vehicle. The water supply support pipe (101) is connected to the water tank of the maintenance vehicle through a connecting water pipe. The single control assembly (2) includes a water supply ring (201), a positioning rod (202), a positioning block (203), a switching block (204), and a maintenance nozzle (205). The water supply ring (201) is rotatably connected to the outside of the water supply support pipe (101), and the positioning rod (202) is rotatably connected to the side of the water supply support pipe (101). The positioning block (203) is inserted into the water supply support pipe. The positioning rod (202) is located outside the positioning block (203), and the side of the positioning block (203) abuts against the side of the water supply ring (201). The switching block (204) is inserted into the inside of one end of the positioning rod (202), and the maintenance nozzle (205) is fixedly installed on the side of the water supply ring (201). The overall adjustment assembly (3) includes an adjusting worm gear (301), a main control rod (302), and a positioning worm wheel (303). The adjusting worm gear (301) is rotatably connected to the side of the water supply support pipe (101), and the main control rod (302) is rotatably connected to the side of the water supply support pipe (101). The positioning worm wheel (303) is fixedly installed on one end of the main control rod (302), and the positioning worm wheel (303) is connected to the adjusting worm gear (301) in a transmission manner. The rod body of the main control rod (302) passes through the inside of the positioning rod (202).

2. The crack prevention structure as described in claim 1, characterized in that: The water supply support pipe (101) has a water supply channel (1011) inside, and a connection notch (1012) is provided on the side of the water supply channel (1011). The water supply ring (201) is installed at the connection notch (1012) of the water supply support pipe (101).

3. The crack prevention structure as described in claim 1, characterized in that: The single control component (2) is provided with four sets outside the water supply support pipe (101). The number of sets is not limited to four and can be increased or decreased.

4. The crack prevention structure as described in claim 1, characterized in that: The water supply ring (201) has a spiral positioning groove (2011) on its side, and the positioning block (203) has a positioning protrusion (2031) on its side, which is inserted into the positioning groove (2011).

5. The crack prevention structure as described in claim 1, characterized in that: The positioning rod (202) has a bidirectional threaded section (2021) in the middle of its body, and the positioning block (203) has a limiting threaded groove (2032) inside, which is threadedly engaged with the bidirectional threaded section (2021).

6. The crack prevention structure as described in claim 1, characterized in that: The positioning block (203) is provided with connecting springs (2033) on both sides, and the connecting springs (2033) are sleeved on the outside of the positioning rod (202). The two ends of the connecting springs (2033) are respectively fixedly connected to the side of the positioning block (203) and the side of the water supply support pipe (101).

7. The crack prevention structure as described in claim 1, characterized in that: The main control lever (302) has a synchronous gear (3021) on its outside and a synchronous tooth groove (2041) inside the switching block (204), which is inserted into the synchronous gear (3021).

8. The crack prevention structure as described in claim 1, characterized in that: The side of the switching block (204) is provided with a synchronous top spring (2042), and the two ends of the synchronous top spring (2042) abut against the side of the switching block (204) and the side of the positioning rod (202) respectively.

9. The crack prevention structure as described in claim 1, characterized in that: The side of the switching block (204) is provided with a synchronization post (2043) with a cross-section of a regular polygon, and the side of the positioning rod (202) is provided with a synchronization groove (2022), and the synchronization post (2043) is inserted into the inside of the synchronization groove (2022).

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