A molding sand recycling apparatus

Abstract

The application relates to the technical field of foundry sand regeneration equipment, and provides foundry sand regeneration equipment, which comprises a rack, a transmission module is arranged in the middle of the rack, motors are arranged on the two sides of the transmission module, old sand enters a centrifugal rotor hub from an opening in the upper central position of the centrifugal rotor hub, is thrown out from the opening of the centrifugal rotor hub under the action of centrifugal force, collides with a first broken baffle assembly to complete primary breaking, the broken old sand falls to a broken wheel, the broken wheel strikes the sand block to complete secondary breaking by using broken teeth arranged on the surface when the broken wheel rotates at high speed, air blowing components are used for cooling the foundry sand and blowing out floating old sand ash, so that the old sand can be broken, impurities can be removed, and cooling operation can be realized, so that the regeneration treatment period of the old sand is shortened, in addition, the compact treatment equipment can reduce the floor area of the whole regeneration equipment and improve the space utilization rate of a production plant.

Description

Technical Field

[0001] This invention relates to the field of molding sand regeneration equipment, and specifically to a molding sand regeneration equipment. Background Technology

[0002] Molding sand is used for casting, and the most common type is silica sand. During casting, the proportion of old sand in the molding process is very high, which has a great impact on the cost and performance of molding sand. In order to save costs, casting companies usually recycle old sand to make recycled sand for reuse. Old sand often contains many impurities, such as iron blocks, nails and sand lumps, which must be cleaned before reuse.

[0003] During casting, sand undergoes sintering and ash formation when burned at high temperatures. When the recycled molding sand contains lumps and a large amount of ash, it will affect the quality of the castings. Therefore, it is necessary to crush and remove dust from the old sand during recycling. Currently, most manufacturers use complete sets of equipment for old sand recycling, which occupy a large area and result in high maintenance costs due to the large number of devices. In addition, in some large-scale casting enterprises, the amount of sand used is large. When using existing equipment for sand cooling, the sand needs to be crushed, screened, and dried in different equipment before being mixed with new sand in a certain proportion to make recycled sand. The processing cycle is long and the processing volume is limited, resulting in low processing efficiency that often fails to meet the demand for molding sand in sand foundries, thus making it impossible to use recycled sand for casting operations quickly and efficiently. Summary of the Invention

[0004] In actual production, due to the limitations of the production site, the complete set of equipment used for the recycling of casting sand is difficult to achieve large-scale casting sand recycling operations. Secondly, when processing old sand, the old sand needs to be transferred to multiple devices for crushing and impurity removal, and the entire processing cycle is long, which is difficult to meet the needs of production. Therefore, this invention provides a casting sand recycling equipment to solve the technical problems of existing complete sets of processing equipment, which have many workstations, long processing cycles and large floor space.

[0005] The present invention provides a molding sand regeneration device with the following technical solution: A molding sand regeneration device includes a frame, a transmission module in the middle of the frame, motors on both sides of the transmission module, a discharge port below the transmission module welded to the middle of the frame, the transmission module penetrating the bottom of the discharge port, and the transmission module being driven by two motors. A rotating hub assembly is fitted within the transmission module; the two motors drive the rotating hub assembly to rotate. A crushing chamber is located on the outer side of the rotating hub assembly, and a feed inlet is located above the crushing chamber. The crushing chamber includes a first crushing baffle assembly fixed to the upper surface of the discharge port. A lower housing is fixed to the outside of the crushing baffle assembly, and an upper housing is fixed to the upper end face of the lower housing. The upper housing is in contact with the upper end face of the first crushing baffle assembly. A first chamber is formed between the first crushing baffle assembly, the lower housing, and the upper housing. Used sand enters the rotating hub assembly from the feed inlet. The motor drives the rotating hub assembly to throw out the molding sand under centrifugal force. The high-speed thrown sand blocks collide with the first crushing baffle assembly to complete one crushing. A large amount of dust is generated during the collision. The dust passes through the first crushing baffle assembly, is filtered by the first crushing baffle assembly, and then enters the first chamber for discharge.

[0006] The hub assembly includes a drive shaft fitted in the transmission module. A centrifugal hub is fixed at the top of the drive shaft. A crushing wheel is provided around the lower perimeter of the centrifugal hub. The crushing wheel has multiple crushing teeth. The centrifugal hub and the first crushing baffle assembly form a second chamber. The crushing wheel has multiple crushing teeth. Old sand enters the centrifugal hub through an opening at the center of the upper part of the centrifugal hub. Under the action of centrifugal force, it is thrown out from the opening of the centrifugal hub and collides with the first crushing baffle assembly to complete the first crushing. The crushed old sand falls onto the crushing wheel. When the crushing wheel rotates at high speed, it uses the crushing teeth on its surface to strike the sand blocks to complete the secondary crushing.

[0007] Furthermore, the rotating hub assembly also includes an air blowing assembly fixed on the upper shell. The air blowing assembly has an annular hollow structure, with its upper end face fixedly connected to the upper shell. An air blowing port is provided at the center of the lower end face of the air blowing assembly, and the air blowing port is clearance-fitted with the feed inlet of the centrifugal rotating hub. Multiple pipe joints are installed on the upper end face of the air blowing assembly, and an air pipe is connected to the air blowing assembly. By blowing air, the temperature of the sand is quickly reduced, and at the same time, the dust in the sand is blown out by blowing air, thereby reducing the ash content in the sand.

[0008] Furthermore, the first crushing baffle assembly includes a fixed base plate fixed to the upper end face of the feed port. Multiple L-shaped baffles are welded on the fixed base plate, and the multiple L-shaped baffles are connected to form a ring. A connecting ring is fixedly installed on the upper end face of the ring, and a guide ring is fixed on the bottom inner side of the ring. A screen is provided on the short side of the L-shaped baffle. The screen is set according to the particle size of the sand, thereby filtering the blown dust.

[0009] Furthermore, a gravity gate is installed at the bottom of the discharge port. Under the action of its own elastic reset component, the gravity gate is in a closed state, which can reduce dust overflow during sand treatment air blowing. When a large amount of material accumulates, the gravity gate will automatically open under the action of gravity.

[0010] Furthermore, a second crushing baffle is provided between the centrifugal hub and the L-shaped baffle, and the height of the second crushing baffle is less than half that of the L-shaped baffle.

[0011] Furthermore, the second crushing baffle includes fixed rings at the upper and lower ends, which are fixedly connected to the L-shaped baffle by a connecting rod, and multiple crushing triangular plates are provided between the fixed rings.

[0012] Furthermore, the crushing chamber also includes a cooling component fixed to the first crushing baffle assembly, which reduces the temperature of the first chamber while cleaning the dust in the second chamber.

[0013] Furthermore, the cooling assembly includes an annular water pipe fixed between the fixed base plate and the L-shaped baffle. Multiple cooling plates are fixedly connected to the annular water pipe, and the cooling plates are attached to the outer side of the long side of the fixed base plate. Spray nozzles are opened on the top of the cooling plates, and multiple water inlet pipes are connected to the annular water pipe.

[0014] The beneficial effects of this invention are:

[0015] (1) The centrifugal drum, the first crushing baffle assembly and the air blowing assembly set in this invention can achieve the following functions: the old sand enters the centrifugal drum through the opening at the center position above the centrifugal drum, is thrown out from the opening of the centrifugal drum under the action of centrifugal force, and collides with the first crushing baffle assembly to complete the first crushing. The crushed old sand falls to the crushing wheel. When the crushing wheel rotates at high speed, it uses the crushing teeth set on the surface to hit the sand block to complete the secondary crushing. At the same time, the air blowing assembly is used to cool the casting sand and blow out the floating old sand ash. In this way, the crushing, impurity removal and cooling operations of the old sand can be quickly realized, thereby shortening the old sand regeneration cycle. In addition, the compact processing equipment can reduce the footprint of the whole set of regeneration equipment and improve the space utilization of the production plant.

[0016] (2) The rotating hub assembly and the second crushing baffle provided in this invention utilize the difference in the mass of the lumps in the sand and the characteristic that the ash is easy to float. The second crushing baffle can crush lumps of different particle sizes in a targeted manner, so that the larger lumps can be subjected to stronger impact force, thereby eliminating the lumps and impurities in the old sand to the maximum extent. At the same time, the continuously rotating centrifugal hub and crushing wheel continuously impact the casting sand, raising the ash dust, which is then removed by the first crushing baffle assembly, thus completing the crushing and impurity removal operation of the old sand.

[0017] (3) The cooling component of the present invention is connected to the annular water pipe. When in use, cold water is introduced through the water inlet pipe to cool down the second chamber with a higher temperature, which is beneficial to the cooling treatment of old sand. The water flowing in through the water inlet pipe gradually fills the annular water pipe and the cooling plate, and then sprays out from the spray nozzle to spray the dust absorbed into the first chamber. Then it is discharged through the discharge port opened on the lower shell. In this way, dust pollution caused by the discharge of ash dust is avoided, the amount of floating particles in the equipment exhaust gas is reduced, and the equipment is more environmentally friendly, which is conducive to achieving the requirements of environmental protection in production. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of a molding sand recycling device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the assembly of the centrifugal hub of the present invention;

[0022] Figure 4 This is a schematic diagram of the centrifugal hub of the present invention;

[0023] Figure 5 This is a cross-sectional view of the middle section of the present invention;

[0024] Figure 6 This is a schematic diagram of the pulverizing chamber of the present invention;

[0025] Figure 7 This is a schematic diagram of the assembly of the cooling component of the present invention;

[0026] Figure 8 This is a schematic diagram of the cooling assembly of the present invention;

[0027] Figure 9 for Figure 8 A magnified view of area A in the middle.

[0028] In the diagram: 1. Frame; 2. Crushing chamber; 3. Motor; 4. Feed inlet; 5. Discharge outlet; 6. Hub assembly; 21. Lower shell; 22. Upper shell; 23. Cooling assembly; 24. First crushing baffle assembly; 25. Second crushing baffle; 51. Gravity gate; 61. Centrifugal hub; 62. Crushing wheel; 63. Air blowing assembly; 64. Transmission shaft; 251. Fixing ring; 252. Crushing triangle plate; 231. Annular water pipe; 232. Water inlet pipe; 233. Cooling plate; 234. Spray nozzle; 241. Fixed base plate; 242. Connecting ring; 243. Guide ring; 244. L-shaped baffle; 245. Screen; 631. Pipe joint; 632. Air blowing port; 641. Crushing teeth. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] An embodiment of the casting sand regeneration equipment of the present invention, such as... Figures 1 to 9 As shown, a casting sand recycling device includes a frame 1, a transmission module in the middle of the frame 1, motors 3 on both sides of the transmission module, and a discharge port 5 below the transmission module. The discharge port 5 is welded to the middle of the frame 1, and the transmission module passes through the bottom of the discharge port 5. The transmission module is driven by two motors, and a rotating hub assembly 6 is fitted in the transmission module. The two motors 3 drive the rotating hub assembly 6 to rotate. A crushing chamber 2 is located on the outside of the rotating hub assembly 6, and a feed inlet 4 is located above the crushing chamber 2. The crushing chamber 2 includes a first crushing baffle assembly 24 fixed to the upper surface of the discharge port 5. The outer side of the first crushing baffle assembly 24 is fixed... A lower housing 21 is fixed, and an upper housing 22 is fixed to the upper end face of the lower housing 21. The upper housing 22 is in contact with the upper end face of the first crushing baffle assembly 24. The first crushing baffle assembly 24 forms a first chamber with the lower housing 21 and the upper housing 22. Used sand enters the rotating hub assembly 6 from the feed port 4. The motor 3 drives the rotating hub assembly 6 to throw out the molding sand under the action of centrifugal force. The sand blocks thrown out at high speed collide with the first crushing baffle assembly 24 to complete one crushing. During the collision, the dust passes through the first crushing baffle assembly 24, and after being filtered by the first crushing baffle assembly 24, it enters the first chamber and is discharged.

[0031] The hub assembly 6 includes a transmission main shaft 64 that is fitted into the transmission module. A centrifugal hub 61 is fixed to the top of the transmission main shaft 64. A crushing wheel 62 is provided around the lower periphery of the centrifugal hub 61. The crushing wheel 62 is provided with multiple crushing teeth 641. The centrifugal hub 61 and the first crushing baffle assembly 24 form a second chamber. The old sand enters the centrifugal hub 61 through the opening at the center of the upper part of the centrifugal hub 61. Under the action of centrifugal force, it is thrown out from the opening of the centrifugal hub 61 and collides with the first crushing baffle assembly 24 to complete the first crushing. The crushed old sand falls to the crushing wheel 62. When the crushing wheel 62 rotates at high speed, it uses the crushing teeth 641 on its surface to strike the sand blocks to complete the secondary crushing.

[0032] As one embodiment of the present invention, such as Figure 2-4 As shown, the hub assembly 6 also includes an air blowing assembly 63 fixed on the upper housing 22. The air blowing assembly 63 has an annular hollow structure, with its upper end face fixedly connected to the upper housing 22. An air blowing port 632 is provided at the center of the lower end face of the air blowing assembly 63, and the air blowing port 632 is clearance-fitted with the feed port of the centrifugal hub 61. Multiple pipe joints 631 are installed on the upper end face of the air blowing assembly 63. The air blowing assembly 63 is connected to an external air pipe. By blowing air, the temperature of the sand is quickly reduced, and at the same time, the dust in the sand is blown out by blowing air, thereby reducing the ash content in the sand.

[0033] As one embodiment of the present invention, such as Figure 6-9 As shown, the first crushing baffle assembly 24 includes a fixed base plate 241 fixed to the upper end face of the feed port 5. Multiple L-shaped baffles 244 are welded on the fixed base plate 241, and the multiple L-shaped baffles 244 are connected to form a ring. A connecting ring 242 is fixedly installed on the upper end face of the ring, and a guide ring 243 is fixedly installed on the bottom inner side of the ring. A screen 245 is provided on the short side of the L-shaped baffle 244. The screen is set according to the particle size of the sand, so as to filter the blown dust.

[0034] As one embodiment of the present invention, such as Figure 5 As shown, a gravity gate 51 is provided at the bottom of the discharge port 5. Under the action of its own elastic reset member, the gravity gate 51 is in a closed state, which can reduce dust overflow during sand treatment air blowing. When a large amount of material accumulates, the gravity gate 51 will automatically open under the action of gravity.

[0035] In actual operation, the old sand enters the centrifugal drum 61 through the air inlet 4 and the air blowing port 632 of the air blowing component 63. Under the action of centrifugal force, the sand is thrown outward and cooled by blowing cold air. At the same time, the dust in the sand is lifted up and fills the second chamber. The bottom of the discharge port 5 is not open to the outside under the action of gravity gate 51. When the air blowing component 63 blows air continuously, the air flow carries the dust and blows it out from the screen 245.

[0036] As one embodiment of the present invention, such as Figure 3 As shown, a second crushing baffle 25 is provided between the centrifugal hub 61 and the L-shaped baffle 244, and the height of the second crushing baffle 25 is less than half that of the L-shaped baffle 244. When the sand blocks are thrown out, the heavier sand blocks are in the lower layer and achieve more effective crushing by impacting the closer baffle. The casting sand enters from the upper center inlet of the centrifugal hub 61 and is thrown out through the side opening. During the process of the casting sand being thrown out by centrifugal force, the sand blocks will still move in the vertical direction. Therefore, when the sand blocks enter the centrifugal hub 61, they all tend to be thrown out from the bottom layer of the centrifugal hub 61. The agglomerates in the foundry sand have different masses, and therefore experience different centrifugal forces. Larger agglomerates experience greater centrifugal forces, resulting in a greater downward displacement relative to the centrifugal hub 61 as they enter and exit the hub. Consequently, larger agglomerates tend to be at the bottom when exiting the centrifugal hub 61. By setting up a second crushing baffle 25, agglomerates of different particle sizes can be crushed in a targeted manner, allowing larger agglomerates to be subjected to stronger impact forces, thus enabling more effective treatment of agglomerates in the old sand.

[0037] As one embodiment of the present invention, such as Figure 6 As shown, the second crushing baffle 25 includes a fixing ring 251 fixed at both the upper and lower ends. The fixing ring 251 is fixedly connected to the L-shaped baffle 244 by a connecting rod. Multiple crushing triangular plates 252 are provided between the fixing rings 251. The corners of the crushing triangular plates 252 point towards the center of the centrifugal hub 61, making it easier to crush the sand when impacted.

[0038] In actual operation, when the sand block flies out of the centrifugal drum 61 under the action of centrifugal force, the heavier sand particles are thrown out from the bottom and collide with the second crushing baffle 25, thereby achieving a better crushing effect, while the lighter dust crosses the second crushing baffle 25 and collides with the long side of the L-shaped baffle 244, thereby reducing the mixing of light dust into the recycled raw materials.

[0039] As one embodiment of the present invention, such as Figure 2 As shown, the crushing chamber 2 also includes a cooling component 23 fixed on the first crushing baffle assembly 24. The cooling component 23 reduces the temperature of the first chamber by water cooling, which is beneficial for the cooling treatment of old sand. At the same time, the cooling water is used to adsorb and clean the dust in the second chamber.

[0040] As one embodiment of the present invention, such as Figure 7As shown, the cooling assembly 23 includes an annular water pipe 231 fixed between the fixed base plate 241 and the L-shaped baffle 244. Multiple cooling plates 233 are fixedly connected to the annular water pipe 231, and the cooling plates 233 are attached to the outer side of the long side of the fixed base plate 241. A spray nozzle 234 is opened on the top of the cooling plate 233. Multiple water inlet pipes 232 are connected to the annular water pipe 231. Both the annular water pipe 231 and the cooling plates 233 are hollow structures, and the cooling plates 233 are connected to the annular water pipe 231. In use, cold water is introduced through the water inlet pipes 232 to cool down the second chamber with a higher temperature, which is beneficial to the cooling of old sand. The water flowing in from the water inlet pipes 232 gradually fills the annular water pipe 231 and the cooling plates 233, and then sprays out from the spray nozzles 234 to spray the dust absorbed into the first chamber, and then discharges it through the discharge port opened on the lower shell 21.

[0041] Working principle: The old sand enters the centrifugal drum 61 through the opening at the center of the top of the centrifugal drum 61. Under the action of centrifugal force, it is thrown out from the opening of the centrifugal drum 61 and collides with the first crushing baffle assembly 24 to complete the first crushing. The crushed old sand falls to the crushing wheel 62. When the crushing wheel 62 rotates at high speed, it uses the crushing teeth 641 on its surface to strike the sand blocks to complete the secondary crushing. During this process, taking advantage of the difference in the mass of the lumps in the sand and the easy floating of the ash, the second crushing baffle 25 is used to crush the lumps of different particle sizes in a targeted manner, so that the larger lumps can be subjected to stronger impact force, thereby eliminating the lumps and impurities in the old sand to the greatest extent. At the same time, the continuously rotating centrifugal drum 61 and the crushing wheel 62 continuously strike the molding sand, raising the ash dust, which is then removed by the first crushing baffle assembly 24, thus completing the crushing and impurity removal of the old sand.

[0042] During this process, at the air inlet 632, the sand is cooled by blowing cold air, which also lifts the dust in the sand and fills the second chamber. The bottom of the discharge port 5 is not open to the outside due to the gravity gate 51. When the air blowing component 63 blows air continuously, the airflow carries the dust out through the screen 245. The ash contained in the fully crushed casting sand is fully released, thus filling the entire second chamber. Cold airflow is blown into the second chamber, which cools the old sand and carries the floating ash to the screen 245 more quickly and discharges it. In this way, the cooling process of the old sand can be completed, and it is also more conducive to removing the ash in the old sand.

[0043] The old sand contains high heat. During the process of processing the old sand by the centrifugal hub 61 and the first crushing baffle assembly 24 and the second crushing baffle 25, its own temperature will also rise. The cooling plate 233 is connected to the annular water pipe 231. When in use, cold water is introduced through the water inlet pipe 232 to cool down the second chamber with a higher temperature, which is beneficial to the cooling treatment of the old sand. The water flowing in from the water inlet pipe 232 gradually fills the annular water pipe 231 and the cooling plate 233, and then sprays out from the spray nozzle 234 to spray the dust absorbed into the first chamber. Then it is discharged through the discharge port opened on the lower shell 21. In this way, dust pollution caused by the discharge of ash dust is avoided, the waste emission of the equipment is reduced, and the equipment is more in line with environmental protection requirements.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A molding sand regeneration device, comprising a frame (1), a transmission module provided in the middle of the frame (1), motors (3) provided on both sides of the transmission module, a discharge port (5) provided below the transmission module, a rotating hub assembly (6) cooperating in the transmission module, a crushing chamber (2) provided on the outside of the rotating hub assembly (6), and a feed inlet (4) provided above the crushing chamber (2), characterized in that: The crushing chamber (2) includes a first crushing baffle assembly (24) fixed on the upper end face of the feed inlet (5). A lower shell (21) is fixed on the outer side of the first crushing baffle assembly (24). An upper shell (22) is fixed on the upper end face of the lower shell (21). The upper shell (22) is in contact with the upper end face of the first crushing baffle assembly (24). A first chamber is formed between the first crushing baffle assembly (24), the lower shell (21), and the upper shell (22). The hub assembly (6) includes a transmission spindle (64) fitted in the transmission module. A centrifugal hub (61) is fixed on the top of the transmission spindle (64). A crushing wheel (62) is provided on the periphery below the centrifugal hub (61). Multiple crushing teeth (641) are provided on the crushing wheel (62). A second chamber is located between the centrifugal hub (61) and the first crushing baffle assembly (24). Multiple crushing teeth (641) are provided on the crushing wheel (62). The hub assembly (6) also includes an air blowing assembly (63) fixed on the upper housing (22). The air blowing assembly (63) is an annular hollow structure. The upper end face is fixedly connected to the upper housing (22). An air blowing port (632) is provided at the center of the lower end face of the air blowing assembly (63). The air blowing port (632) is clearance-fitted with the feed port of the centrifugal hub (61). Multiple pipe joints (631) are installed on the upper end face of the air blowing assembly (63).

2. The molding sand regeneration equipment according to claim 1, characterized in that: The first crushing baffle assembly (24) includes a fixed base plate (241) fixed on the upper end face of the feed port (5). Multiple L-shaped baffles (244) are welded on the fixed base plate (241), and the multiple L-shaped baffles (244) are connected to form a ring. A connecting ring (242) is fixedly installed on the upper end face of the ring, and a guide ring (243) is fixed on the bottom inner side of the ring. A screen (245) is provided on the short side of the L-shaped baffle (244).

3. The molding sand regeneration equipment according to claim 2, characterized in that: A gravity gate (51) is provided at the bottom of the discharge port (5).

4. The molding sand regeneration equipment according to claim 3, characterized in that: A second crushing baffle (25) is provided between the centrifugal hub (61) and the L-shaped baffle (244), and the height of the second crushing baffle (25) is less than half that of the L-shaped baffle (244).

5. The molding sand regeneration equipment according to claim 4, characterized in that: The second crushing baffle (25) includes a fixing ring (251) fixed at both the upper and lower ends. The fixing ring (251) is fixedly connected to the L-shaped baffle (244) by a connecting rod. Multiple crushing triangular plates (252) are provided between the fixing rings (251).

6. A molding sand regeneration device according to any one of claims 2-5, characterized in that: The crushing chamber (2) also includes a cooling assembly (23) fixed on the first crushing baffle assembly (24), which reduces the temperature of the first chamber and cleans the dust in the second chamber.

7. The molding sand regeneration equipment according to claim 6, characterized in that: The cooling assembly (23) includes an annular water pipe (231) fixed between a fixed base plate (241) and an L-shaped baffle (244). Multiple cooling plates (233) are fixedly connected to the annular water pipe (231), and the cooling plates (233) are attached to the outer side of the long side of the fixed base plate (241). A spray nozzle (234) is provided on the top of the cooling plate (233), and multiple water inlet pipes (232) are connected to the annular water pipe (231).

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