Intelligent purification device for stator cooling water

Abstract

The utility model relates to the technical field of stator cooling water treatment, discloses an intelligent stator cooling water purification device, and solves the problem that the real-time change of drainage flow when the water level rises suddenly cannot be solved in the prior art under the condition that excessive water discharged by a stator cooling water tank through an overflow pipe is received and the water level of the stator cooling water tank is overhigh. The device comprises a purification device, a middle water tank is installed in the purification device, the middle water tank comprises a water inlet pipe, a water storage tank is arranged at one end of the water inlet pipe, a tank cover is installed at the upper end of the water storage tank, and a water outlet pipeline is arranged at the lower end of the water storage tank; a floating assembly is installed in the water storage tank, a quick drainage device is installed at the lower end of the floating assembly in a penetrating mode, two first drainage pipes are fixedly installed at the lower end of the quick drainage device, the lower ends of the first drainage pipes communicate with the water outlet pipeline, and semicircular shells are rotationally installed in the first drainage pipes.

Description

Technical Field

[0001] The utility model relates to the technical field of cold water treatment, in particular to an intelligent cold water purification device. Background Art

[0002] The 2×350MW supercritical units in the thermal power plant use a generator with a "water-hydrogen-hydrogen" cooling method. The stator cooling water must be clean and pure. In order to slow down the corrosion of the winding copper wire rods and avoid corrosion deposition, our factory adopts a small mixed bed treatment method to adjust the cooling water quality in the generator. After the resin fails, it needs to be regenerated in vitro, which is a large workload. People are easily injured by contact with acids and alkalis. The water quality adjustment effect is not good, and the operation and maintenance workload is large. When the generator is generating electricity, the temperature of the coil on the generator will increase, thereby affecting the service life of the generator. When cooling the coil of the generator, it is generally through air cooling, hydrogen cooling and water cooling. When the generator is water-cooled, it is generally necessary to use constant cooling water.

[0003] The existing Chinese patent with publication number CN116317358A discloses an intermediate water tank for recovering cooling water of a generator. When the water level in the water tank is lower than the floating block, the water in the water tank will enter the return pipe through the primary return hole; when the flow rate of water entering the water tank through the water inlet pipe is greater than the return flow rate of the primary return hole, the water level in the water tank will rise and exceed the floating block, and the floating block will drive the first water level regulating component to move upward through buoyancy; during the upward movement of the first water level regulating component, the secondary return hole will no longer be in contact with the water level regulating component. The inner wall of the return pipe is slidably connected to the bottom of the water tank, and the water in the water tank enters the return pipe through the primary return hole and the secondary return hole, increasing the return flow rate; when the flow rate of water entering the water tank through the water inlet pipe is greater than the total return flow rate of the primary return hole and the secondary return hole, the water level in the water tank rises further until the water retaining ring is no longer slidably connected to the inner wall of the drain pipe and the bottom of the water tank, and the water in the water tank enters the return pipe through the primary return hole and the secondary return hole, and also enters the drain pipe through the drain hole to prevent the water tank from being full of water.

[0004] The above-mentioned related technologies receive excess water discharged from the cooling water tank through the overflow pipe to avoid the situation where the water level in the cooling water tank is too high. The existing technology cannot solve the real-time change of the drainage flow when the water level rises suddenly, resulting in the water outflow being less than the water inflow, causing the water flow in the cooling water tank to overflow and cause damage to the device. Utility Model Content

[0005] The purpose of the utility model is to provide an intelligent cooling water purification device. By adopting the device to work, the problem of excess water discharged from the cooling water tank through the overflow pipe is solved, and the water level in the cooling water tank is avoided to be too high. In the prior art, it is impossible to solve the problem that when the water level rises suddenly, the real-time change of the drainage flow rate is caused, resulting in the water output being less than the water input, causing the water flow in the cooling water tank to overflow and causing damage to the device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixed cold water intelligent purification device, including a purification device, an intermediate water tank is installed inside the purification device, the intermediate water tank includes a water inlet pipe, one end of the water inlet pipe is provided with a water storage tank, the upper end of the water storage tank is provided with a box cover, and the lower end of the water storage tank is provided with a water outlet pipe, a float assembly is installed inside the water storage tank, a quick drainage device is installed through the lower end of the float assembly, two groups of drain pipes 1 are fixedly installed on the lower end of the quick drainage device, the lower end of the drain pipe 1 is fixedly connected to the water storage tank, the lower end of the drain pipe 1 is connected to the water outlet pipe, and a semicircular shell is rotatably installed inside the drain pipe 1; the float assembly includes a floating plate, a drain pipe 2 is fixedly installed on the lower end of the floating plate, the drain pipe 2 is slidably connected to the quick drainage device, and a plurality of drainage holes are provided at the lower end of the drain pipe 2. , multiple sets of drainage grooves are provided at the lower end of the drainage pipe 2. When the water inflow speed in the water tank is relatively slow, the water flowing into the water tank accumulates, and the water level slowly rises above the floating board, thereby driving the floating board to move upward, and the water in the water tank is discharged through the drainage hole to maintain the water level in the water tank stable. When the water inflow speed in the water tank gradually becomes faster, when the water flow discharged through the drainage hole is less than the water inflow flow, the water level slowly rises, driving the floating board to continue to move upward, thereby driving the drainage pipe 2 to move upward, slowly exposing the drainage groove at the lower end of the drainage pipe 2, thereby increasing the drainage flow in the water tank. When the water inflow speed in the water tank is greater than the drainage speed in the water tank, the water tank accelerates the drainage process through the quick drainage device to prevent the water flow in the water tank from overflowing, causing the water in the fixed cooling water tank to overflow and affect the operation of the device.

[0007] Preferably, the quick-drain device includes a drain pipe and a connecting rod, a plurality of drainage grooves are provided on the outer side of the drain pipe, a baffle plate is slidably installed inside the drain pipe, a connecting rod is fixedly installed on one end of the baffle plate, a spring is slidably arranged on the outer side of the connecting rod, one end of the connecting rod is fixedly connected to the baffle plate, the other end of the connecting rod is fixedly connected to the drain pipe, one end of the connecting rod away from the baffle plate passes through the drain pipe, a U-shaped rod is fixedly installed on the end of the connecting rod away from the baffle plate, a rack is fixedly installed on the end of the U-shaped rod away from the drain pipe, a rotating gear is meshingly installed on one end of the rack, and the rotating gear is located inside the connecting pipe.

[0008] Preferably, a hole is formed on the connecting pipe 1, and the drain pipe 2 matches the hole.

[0009] Preferably, the lower end of the rotating gear one is rotatably connected to a drain pipe one, and the lower end of the rotating gear one is fixedly connected to a semicircular shell. When the water inlet speed in the water tank is greater than the drainage speed of the drainage hole and the drainage groove, the water outlet in the water inlet pipe is too large, causing the water flow to impact the baffle plate, so that the baffle plate pushes the connecting rod one to move, and the connecting rod one pushes the U-shaped rod to start moving, and the rotating gear one is engaged with the rack one on the U-shaped rod to rotate, thereby driving the semicircular shell at the lower end of the rotating gear to start rotating, thereby increasing the drainage speed of the water tank.

[0010] Preferably, the float assembly includes a second rack, which is engaged with a quick-drain device. When the water inlet speed in the water tank is greater than the drainage speed of the drainage hole and the drainage groove, the floating plate continues to move upward, so that the second rack is engaged with the quick-drain device, and then the quick-drain device is opened, thereby increasing the drainage volume of the water tank.

[0011] Preferably, the quick-draining device includes a connecting disk and a second connecting rod, a connecting rod three is fixedly installed on the upper end of the connecting disk, a connecting block is rotatably installed on the upper end of the connecting rod three, a folding rod is rotatably installed on one end of the connecting block, and a rotating gear two is rotatably installed on the end of the folding rod away from the connecting block, a U-shaped connecting rod is installed through the inside of the second rotating gear, the U-shaped connecting rod is rotatably connected to the second rotating gear, the upper end of the U-shaped connecting rod is fixedly connected to the second connecting rod, the second rotating gear is meshed with the second rack, the lower end of the connecting disk is fixedly connected to the semicircular shell, and the floating plate is moved up to drive the second rack to mesh with the second rotating gear, which drives the second rotating gear to rotate, and then pulls the folding rod downward to rotate, the folding rod cooperates with the connecting block to pull the connecting rod three to drive the connecting disk to rotate, and the rotation of the connecting disk drives the semicircular shell to rotate, thereby increasing the drainage speed of the water tank.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] When the water inlet speed in the water tank is relatively slow, the water flowing into the water tank accumulates, and the water level is slowly higher than the floating plate, thereby driving the floating plate to move upward, and the water in the water tank is discharged through the drainage hole, so as to maintain the water level in the water tank stable. When the water inlet speed in the water tank is gradually accelerated, when the water flow discharged through the drainage hole is less than the water inlet flow, the water level slowly rises, driving the floating plate to continue to move upward, thereby driving the drainage pipe 2 to move upward, slowly exposing the drainage groove at the lower end of the drainage pipe 2, thereby increasing the drainage flow in the water tank. When the water inlet speed in the water tank is greater than the drainage speed of the drainage hole and the drainage groove, the water outflow in the water inlet pipe is too large, causing the water flow to impact the baffle plate, so that the baffle plate pushes the connecting rod 1 to move, and the connecting rod 1 pushes the U-shaped rod to start moving, and the rack 1 on the U-shaped rod meshes with the rotating gear 1 to rotate, thereby driving the semicircular shell at the lower end of the rotating gear to start rotating, thereby increasing the drainage speed of the water tank.

[0014] 2. The utility model proposes a fixed cold water intelligent purification device. When the water inlet speed in the water tank is greater than the drainage speed of the drainage hole and the drainage groove, the floating plate continues to move upward, so that the rack 2 is engaged with the quick drainage device, and the floating plate moves upward to drive the rack 2 to engage with the rotating gear 2, drive the rotating gear 2 to rotate, and then pull the folding rod downward to rotate, the folding rod and the connecting block cooperate to pull the connecting rod 3 to drive the connecting plate to rotate, and the rotation of the connecting plate drives the semicircular shell to rotate, thereby increasing the drainage speed of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the intermediate water tank of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of a water storage tank according to Embodiment 1 of the present utility model;

[0018] Figure 4 This is a schematic structural diagram of a float assembly according to a first embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the structure of a quick-displacement device according to the first embodiment of the utility model;

[0020] Figure 6 This is a schematic diagram of the internal structure of the quick-displacement device of Example 1 of the utility model;

[0021] Figure 7 This is a schematic diagram of the internal structure of the water storage tank of the second embodiment of the utility model;

[0022] Figure 8 This is a schematic diagram of the overall structure of the speed shift device of the second embodiment of the utility model;

[0023] Fig. 9 This is a schematic diagram of the internal structure of the speed shift device of the second embodiment of the utility model;

[0024] Fig.10 This is a schematic diagram of the external structure of the speed shift device of the second embodiment of the utility model.

[0025] In the figure: 1, purification device; 2, intermediate water tank; 21, water inlet pipe; 22, water outlet pipe; 23, water storage tank; 231, floating assembly; 2311, floating board; 2312, drain pipe 2; 2313, drain hole; 2314, drain trough; 232, quick drain device; 2321, hole; 2322, drain pipe; 2323, U-shaped rod; 2324, rotating gear 1; 2325, barrier Plate; 2326, connecting rod one; 2327, spring; 2328, rack one; 2329, connecting pipe one; 233, drain pipe one; 234, semicircular shell; 235, rack two; 2361, connecting plate; 2362, connecting rod three; 2363, connecting block; 2364, folding rod; 2365, rotating gear two; 2366, U-shaped connecting rod; 2367, connecting rod two; 24, box cover. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0029] Combination Figure 1-Figure 4A cold water intelligent purification device includes a purification device 1, an intermediate water tank 2 is installed inside the purification device 1, the intermediate water tank 2 includes a water inlet pipe 21, a water storage tank 23 is arranged at one end of the water inlet pipe 21, a tank cover 24 is installed at the upper end of the water storage tank 23, a water outlet pipe 22 is arranged at the lower end of the water storage tank 23, a float assembly 231 is installed inside the water storage tank 23, a quick discharge device 232 is installed through the lower end of the float assembly 231, and two quick discharge devices 232 are fixedly installed at the lower end of the quick discharge device 232. The first drain pipe 233 is fixedly connected to the water storage tank 23, and the lower end of the drain pipe 233 is connected to the water outlet pipe 22. A semicircular shell 234 is rotatably installed inside the drain pipe 233. The floating assembly 231 includes a floating plate 2311, and a second drain pipe 2312 is fixedly installed at the lower end of the floating plate 2311. The second drain pipe 2312 is slidably connected to the quick drainage device 232. A plurality of drainage holes 2313 are provided at the lower end of the drain pipe 2312. The lower end of the water pipe 2312 is provided with a plurality of drainage grooves 2314. When the water inflow speed in the water tank 23 is relatively slow, the water flowing into the water tank 23 accumulates, and the water level gradually rises above the floating plate 2311, thereby driving the floating plate 2311 to move upward, and the water in the water tank 23 is discharged through the drainage hole 2313, so as to maintain the water level in the water tank 23 stable. When the water inflow speed in the water tank 23 gradually increases, the water flow rate discharged through the drainage hole 2313 is less than the water flow rate when the water inflow speed in the water tank 23 increases. , the water level rises slowly, driving the floating plate 2311 to continue to move upward, thereby driving the second drainage pipe 2312 to move upward, slowly exposing the drainage groove 2314 at the lower end of the second drainage pipe 2312, thereby increasing the drainage flow in the water tank 23. When the water inlet speed in the water tank 23 is greater than the drainage speed in the water tank 23, the water tank 23 accelerates the drainage process through the quick drainage device 232 to prevent the water flow in the water tank 23 from overflowing, causing the water in the fixed cooling water tank to overflow and affect the operation of the device.

[0030] Combination Figure 4-Figure 6 A kind of intelligent cold water purification device, the quick discharge device 232 includes a drain pipe 2322 and a connecting pipe 2329, the outer side of the drain pipe 2322 is provided with a plurality of drainage grooves, the inner side of the drain pipe 2322 is slidably installed with a baffle plate 2325, one end of the baffle plate 2325 is fixedly installed with a connecting rod 2326, the outer side of the connecting rod 2326 is slidably provided with a spring 2327, one end of the connecting rod 2326 is fixedly connected with the baffle plate 2325, and the connecting rod 2326 is slidably provided with a spring 2327. The other end of 2326 is fixedly connected to the drain pipe 2322, and the end of the connecting rod 2326 away from the baffle plate passes through the drain pipe 2322. The end of the connecting rod 2326 away from the baffle plate is fixedly installed with a U-shaped rod 2323, and the end of the U-shaped rod 2323 away from the drain pipe 2322 is fixedly installed with a rack 2328, and one end of the rack 2328 is meshed with a rotating gear 2324, and the rotating gear 2324 is located inside the connecting pipe 2329.

[0031] Combination Figure 4-Figure 6 , a fixed cold water intelligent purification device, a hole 2321 is opened on the connecting pipe 1 2329, and the drain pipe 2312 matches the hole 2321; the lower end of the rotating gear 1 2324 is rotatably connected to the drain pipe 1 233, and the lower end of the rotating gear 1 2324 is fixedly connected to the semicircular shell 234. When the water inlet speed in the water storage tank 23 is greater than the drainage speed of the drainage hole 2313 and the drainage groove 2314, the water output in the water inlet pipe 21 is too large, causing the water flow to impact the baffle plate 2325, so that the baffle plate 2325 pushes the connecting rod 1 2326 to move, and the connecting rod 1 2326 pushes the U-shaped rod 2323 to start moving, and the rack 1 2328 on the U-shaped rod 2323 engages the rotating gear 1 2324 to rotate, thereby driving the semicircular shell 234 at the lower end of the rotating gear 1 2324 to start rotating, thereby increasing the drainage speed of the water storage tank 23.

[0032] Working principle: In this embodiment, water is fed into the water storage tank 23 through the water inlet pipe 21 of the intermediate water tank 2. When the water is fed in slowly, water accumulates so that the water level is higher than the floating plate 2311, driving it to move upward, and water is discharged through the drainage hole 2313 to maintain a stable water level. When the water is fed in faster, the drainage volume of the drainage hole 2313 is less than the water inflow volume, and the floating plate 2311 continues to move upward to expose the drainage groove 2314 to increase the drainage flow rate. When the water inflow speed is greater than the drainage speed, the water flow impacts the baffle plate 2325 of the fast drainage device 232, pushing the connecting rod 2326 to move the U-shaped rod 2323, and the rack 2328 on the U-shaped rod 2323 meshes with the rotating gear 2324 to rotate, driving the semicircular shell 234 to rotate, thereby increasing the gap between the semicircular shell 234 and the drainage pipe 233, thereby increasing the drainage speed of the water storage tank 23.

[0033] Example 2

[0034] Combination Figure 4 , Figure 7 A fixed cold water intelligent purification device, the float assembly 231 includes a rack 235, the rack 235 is meshed with the quick discharge device 232, when the water inlet speed in the water tank 23 is greater than the drainage speed of the drainage hole 2313 and the drainage groove 2314, the floating plate 2311 continues to move upward, so that the rack 235 is meshed with the quick discharge device 232, and then the quick discharge device 232 is opened, so that the drainage volume of the water tank 23 is increased.

[0035] Combination Figure 7-Figure 10A kind of intelligent cold water purification device, the quick discharge device 232 includes a connecting plate 2361 and a connecting rod 2367, the upper end of the connecting plate 2361 is fixedly installed with a connecting rod 3 2362, the upper end of the connecting rod 3 2362 is rotatably installed with a connecting block 2363, one end of the connecting block 2363 is rotatably installed with a folding rod 2364, the end of the folding rod away from the connecting block 2363 is rotatably installed with a rotating gear 2365, the interior of the rotating gear 2365 is penetrated by a U-shaped connecting rod 2366, the U-shaped connecting rod 2366 is rotatably connected with the rotating gear 2365, and the U-shaped connecting rod 2366 is rotatably connected with the rotating gear 2365. The upper end is fixedly connected to the connecting rod 2367, the rotating gear 2365 is meshed with the rack 235, and the lower end of the connecting disk 2361 is fixedly connected to the semicircular shell 234. The floating plate 2311 moves upward to drive the rack 235 to mesh with the rotating gear 2365, driving the rotating gear 2365 to rotate, and then pulling the folding rod 2364 to rotate downward. The folding rod 2364 and the connecting block 2363 cooperate to pull the connecting rod three 2362 to drive the connecting disk 2361 to rotate. The rotation of the connecting disk 2361 drives the semicircular shell 234 to rotate, thereby increasing the drainage speed of the water tank 23.

[0036] Working principle: In this embodiment, the water inlet pipe 21 of the intermediate water tank 2 in the purification device 1 feeds water into the water storage tank 23. When the water inflow is slow, water accumulates so that the water level is higher than the floating plate 2311, driving it to move upward, and the water is discharged through the drainage hole 2313 to maintain a stable water level. When the water inflow becomes faster and the drainage hole 2313 discharges less water than the inflow, the floating plate 2311 continues to move upward to expose the drainage groove 2314 to increase the drainage flow rate. When the water inflow speed is greater than the drainage speed, the floating plate 2311 continues to move upward to make the rack 235 engage with the quick drainage device 232, open the quick drainage device 232, and at the same time drive the relevant components in the quick drainage device 232 to move, and the connecting plate 2361 is driven to rotate through the rotating gear 2365 and the folding rod 2364. The rotation of the connecting plate 2361 drives the semicircular shell 234 to rotate, thereby increasing the drainage speed of the water storage tank 23, preventing the water flow of the water storage tank 23 from overflowing and affecting the operation of the fixed cooling water tank.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold water intelligent purification device, comprising a purification device (1), an intermediate water tank (2) installed inside the purification device (1), the intermediate water tank (2) comprising a water inlet pipe (21), a water storage tank (23) being arranged at one end of the water inlet pipe (21), a tank cover (24) being arranged at the upper end of the water storage tank (23), and a water outlet pipe (22) being arranged at the lower end of the water storage tank (23), characterized in that: A float assembly (231) is installed inside the water storage tank (23), a quick drainage device (232) is installed through the lower end of the float assembly (231), two sets of drainage pipes (233) are fixedly installed at the lower end of the quick drainage device (232), the lower end of the drainage pipe (233) is fixedly connected to the water storage tank (23), the lower end of the drainage pipe (233) is connected to the water outlet pipe (22), and a semicircular shell (234) is rotatably installed inside the drainage pipe (233); The floating assembly (231) comprises a floating plate (2311), a second drainage pipe (2312) is fixedly mounted at the lower end of the floating plate (2311), the second drainage pipe (2312) is slidably connected to the quick drainage device (232), a plurality of drainage holes (2313) are provided at the lower end of the second drainage pipe (2312), and a plurality of drainage grooves (2314) are provided at the lower end of the second drainage pipe (2312).

2. The intelligent cold water purification device according to claim 1, characterized in that: The quick-drain device (232) comprises a drain pipe (2322) and a connecting pipe (2329). The drain pipe (2322) is provided with a plurality of drainage grooves on its outer side. A baffle plate (2325) is slidably mounted inside the drain pipe (2322). A connecting rod (2326) is fixedly mounted on one end of the baffle plate (2325). A spring (2327) is slidably mounted on the outer side of the connecting rod (2326). One end of the connecting rod (2326) is fixedly connected to the baffle plate (2325). The other end of the connecting rod (2326) is fixedly mounted on the outer side of the connecting rod. One end is fixedly connected to the drain pipe (2322); the end of the connecting rod 1 (2326) away from the baffle plate passes through the drain pipe (2322); the end of the connecting rod 1 (2326) away from the baffle plate is fixedly installed with a U-shaped rod (2323); the end of the U-shaped rod (2323) away from the drain pipe (2322) is fixedly installed with a rack 1 (2328); one end of the rack 1 (2328) is meshed with a rotating gear 1 (2324); the rotating gear 1 (2324) is located inside the connecting pipe 1 (2329).

3. The intelligent cold water purification device according to claim 2 is characterized in that: The first connecting pipe (2329) is provided with a hole (2321), and the second drainage pipe (2312) matches the hole (2321).

4. The intelligent cold water purification device according to claim 3 is characterized in that: The lower end of the rotating gear one (2324) is rotatably connected to the drain pipe one (233), and the lower end of the rotating gear one (2324) is fixedly connected to the semicircular shell (234).

5. The intelligent cold water purification device according to claim 4 is characterized in that: The float assembly (231) comprises a second rack (235), and the second rack (235) is meshed with the quick-displacement device (232).

6. The intelligent cold water purification device according to claim 1, characterized in that: The quick-displacement device (232) comprises a connecting disk (2361) and a second connecting rod (2367). A third connecting rod (2362) is fixedly mounted on the upper end of the connecting disk (2361). A connecting block (2363) is rotatably mounted on the upper end of the third connecting rod (2362). A folding rod (2364) is rotatably mounted on one end of the connecting block (2363). A second rotating gear (2365) is rotatably mounted on one end of the folding rod away from the connecting block (2363). A U-shaped connecting rod (2366) is installed through the interior of the second rotating gear (2365). The U-shaped connecting rod (2366) is rotatably connected to the second rotating gear (2365). The upper end of the U-shaped connecting rod (2366) is fixedly connected to the second connecting rod (2367). The second rotating gear (2365) meshes with the second rack (235). The lower end of the connecting disk (2361) is fixedly connected to the semicircular shell (234).

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