A large-volume concrete construction curing system and its curing method

Abstract

The present invention discloses a large-volume concrete construction curing system and a curing method thereof, including a first shunt pipe group and a water storage tank. The first shunt pipe group is equidistantly connected with multiple groups of water seepage vertical pipes, and the water seepage vertical pipes are equidistantly connected with water seepage horizontal pipes. The water seepage vertical pipes and the water seepage horizontal pipes are both provided with water seepage openings, and multiple groups of spray pipes are equidistantly arranged on the upper side of the water seepage horizontal pipes; the water storage tank is connected with the water seepage horizontal pipes through a water pump. The present invention cools the concrete by infiltrating into the concrete through the water seepage holes of the water seepage horizontal pipes and the water seepage vertical pipes; by spraying cooling water through the spray pipes, the upper side of the concrete is cooled, the temperature inside the concrete is balanced, and the efficiency of concrete hardening is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete curing, and particularly to a large-volume concrete construction curing system and a curing method thereof. Background Technique

[0002] After concrete is poured, it needs to be cured to gradually set and harden. During curing, the temperature inside the concrete will rise. Especially inside large-volume concrete, the temperature peak within the first 7 days will reach about 80°C. Since the surface temperature of large-volume concrete is much lower than the internal temperature, at this time, the concrete is prone to cracks, greatly reducing the strength of the concrete and affecting the quality. Therefore, when curing large-volume concrete, it is also necessary to control the temperature difference between the inside and outside of the concrete.

[0003] After retrieval, the patent with the authorization number CN112696037A in China discloses a large-volume concrete comprehensive curing system, including a cooling unit and a curing unit. The curing unit includes a water storage baffle. The water storage baffle is annular, sleeved outside the concrete, and the upper end of the water storage baffle is higher than the concrete. A water storage pool is formed between the water storage baffle and the top of the concrete. The cooling unit includes a water inlet pipe, a water guide pipe, a cooling pipe, and a circulation member. The water guide pipe is connected to the water storage pool, and the water guide pipe is detachably connected to the water inlet pipe. The water inlet end and the water outlet end of the circulation member are respectively communicated with the water inlet pipe and the cooling pipe. The cooling pipe is located inside the concrete, and the end of the cooling pipe far from the circulation member is communicated with the water storage pool. The large-volume concrete comprehensive curing system in this invention can carry out cooling water circulation and watering simultaneously to simplify the operation and save water resources. The large-volume concrete comprehensive curing system in this invention can carry out cooling water circulation and watering simultaneously to simplify the operation and save water resources. However, in this invention, the cooling water is placed on the concrete, which will not only cause a temperature deviation between the upper side of the concrete and the internal temperature of the concrete, resulting in cracking inside the concrete, but also affect the hardening work of the upper part of the concrete because the upper part of the concrete is always in contact with the cooling water. For this reason, we propose a large-volume concrete construction curing system and a curing method thereof. Summary of the Invention

[0004] In view of the deficiencies in the above background technique, the present invention proposes a large-volume concrete construction curing system and a curing method thereof, which solve the problem that the temperature difference between the surface temperature and the internal temperature of large-volume concrete in the prior art is large and prone to cracks.

[0005] The technical solution of the present invention is realized as follows:

[0006] A large-volume concrete construction and curing system, including a first shunt pipe group and a water storage tank. Multiple groups of vertical water seepage pipes are equidistantly connected to the upper side of the first shunt pipe group. Multiple groups of horizontal water seepage pipes are equidistantly connected to the outer sides of the multiple groups of vertical water seepage pipes. Water seepage openings are formed on the outer walls of the vertical water seepage pipes and the horizontal water seepage pipes; multiple groups of spray pipes are equidistantly arranged on the upper side of the horizontal water seepage pipes, and a spray pipe with spray holes is connected to the upper side of the spray pipes; the water storage tank is connected to the horizontal water seepage pipe through a water pump.

[0007] Furthermore, a sleeve is connected to the outer side of the spray pipe. A connecting frame is connected to the outer sides of the multiple groups of sleeves. A first air pump is arranged on the lower side of the connecting frame, and the telescopic end of the first air pump is connected to the connecting frame.

[0008] Furthermore, the water storage tank is connected to a second shunt pipe group through a return pipe, and an insertion pipe matching the sleeve is connected to the lower side of the second shunt pipe group.

[0009] Furthermore, a baffle is connected to the outer side of the insertion pipe. Two guide rods are connected to the lower side of the baffle. Limit plates are connected to the left and right sides of the sleeve, and insertion holes matching the sleeve are formed in the limit plates.

[0010] Furthermore, a function pad is arranged on the lower side of the baffle, and a rubber layer is arranged on the inner wall of the sleeve.

[0011] Furthermore, a connecting water pipe is connected to the side of the water pump close to the water storage tank. The connecting water pipe extends into the water storage tank and is connected to a filter pipe.

[0012] Furthermore, a control switch is connected to the upper side of the spray pipe.

[0013] Furthermore, temperature monitors are installed on the upper and lower sides of the inner wall of the water storage tank.

[0014] A curing method for the large-volume concrete construction and curing system includes putting the lower halves of the first shunt pipe group, the horizontal water seepage pipe, the vertical water seepage pipe, and the spray pipe all into the concrete, installing the first air pump on the upper side of the concrete, starting the water pump, sucking out the cooling water in the first shunt pipe group through the water pump and sending it into the outlet pipe. The first shunt pipe group is made of mud and sand, so it can block the external temperature and sunlight. The cooling water in the first shunt pipe group will cool down by itself because the material of the first shunt pipe group blocks the external sunlight and heat. The cooling water enters the outlet pipe through the connecting water pipe after being filtered by the filter pipe. The cooling water enters the vertical water seepage pipe and the horizontal water seepage pipe through the outlet pipe, and seeps into the concrete through the water seepage holes of the vertical water seepage pipe and the horizontal water seepage pipe to cool the concrete. At the same time, the cooling water in the horizontal water seepage pipe and the vertical water seepage pipe will cool the horizontal water seepage pipe and the vertical water seepage pipe, and the horizontal water seepage pipe and the vertical water seepage pipe absorb the heat of the external concrete to cool the concrete;

[0015] The cooling water enters the spray pipe after passing through the water seepage vertical pipe and the water seepage horizontal pipe, and sprays the cooling water onto the upper side of the concrete through the spray holes of the spray pipe to cool the upper side of the concrete. When the upper side of the concrete has been cooled and enough cooling water has been sprayed on the upper side of the concrete, the first air pump is started. The connecting frame is driven to move downward by the first air pump, and the sleeve is driven to move upward by the downward movement of the connecting frame. When the sleeve moves upward, the limiting plate is driven to move upward. The limiting plate moves upward under the limitation of the guide rod and limits the sleeve at the same time, avoiding the phenomenon that the spray pipe is inclined during long-term use, resulting in the sleeve not being able to be correctly docked with the insertion pipe. The sleeve moves upward and sleeves on the outside of the spray pipe. The sleeve continues to move upward and sleeves on the lower side of the insertion pipe. The insertion pipe and the spray pipe are covered by the sleeve, so that the cooling water cannot leak out from the outside of the spray pipe and can only move into the insertion pipe, and then returns to the inner cavity of the first shunt pipe group through the second shunt pipe group and the return water pipe to complete the cycle. When the sleeve moves upward, it will be blocked by the baffle, and then the gap between the baffle and the upper end of the sleeve is plugged by the acting pad to avoid the cooling water from moving out, improving the stability of the device during use.

[0016] Advantages of the present invention:

[0017] 1. By arranging the water pump, the reservoir, the water seepage horizontal pipe, the water outlet pipe and the water seepage vertical pipe in cooperation, the cooling water can enter the interior of the water seepage horizontal pipe and the water seepage vertical pipe, and penetrate into the concrete through the water seepage holes of the water seepage vertical pipe and the water seepage horizontal pipe to cool the concrete;

[0018] 2. Then, by adopting the method of spraying the cooling water with the spray pipe to cool the upper side of the concrete. Since the cooling water first exchanges heat with the heat inside the concrete in the water seepage horizontal pipe and the water seepage vertical pipe, absorbs a part of the heat inside the concrete, and improves the stability of a part of the cooling water. Then, after the cooling water is discharged from the water seepage horizontal pipe and the water seepage vertical pipe through the spray pipe, the temperature inside the concrete is indirectly balanced, improving the efficiency of the concrete hardening;

[0019] 3. By arranging the sleeve, the connecting frame, the first air pump, the return water pipe and the second shunt pipe group in cooperation, the cooling water in the water seepage horizontal pipe and the water seepage vertical pipe can be circulated back to the reservoir, and the cooling water in the water seepage horizontal pipe and the water seepage vertical pipe will cool the water seepage horizontal pipe and the water seepage vertical pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the present invention;

[0022] Figure 2 is a partial structural schematic diagram of the present invention;

[0023] Figure 3 is Figure 2 an enlarged schematic diagram of A in

[0024] Figure 4 is a top view structural schematic diagram of the present invention;

[0025] Figure 5 is a structural schematic diagram of the action pad of the present invention;

[0026] Figure 6 is a structural schematic diagram of the sleeve of the present invention.

[0027] In the figure: 100, the first shunt pipe group; 110, the water seepage vertical pipe; 111, the water seepage horizontal pipe; 120, the water outlet pipe; 130, the spray pipe; 131, the spray nozzle; 132, the sleeve; 133, the connecting frame; 134, the first air pump; 135, the limiting plate; 136, the control switch; 200, the reservoir; 201, the temperature monitor; 210, the water pump; 211, the connecting water pipe; 212, the filter pipe; 220, the return water pipe; 230, the second shunt pipe group; 240, the insertion pipe; 250, the baffle plate; 260, the action pad; 270, the guide rod. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Such as Figures 1 to 3As shown in the figure, a large-volume concrete construction and curing system described in Embodiment 1 includes a first shunt pipe group 100 and a water storage tank 200. A plurality of water seepage vertical pipes 110 are fixedly connected to the upper side of the first shunt pipe group 100 at equal intervals. A plurality of water seepage horizontal pipes 111 are fixedly connected to the outer sides of the plurality of water seepage vertical pipes 110 at equal intervals. Water seepage openings are formed in the outer walls of the water seepage vertical pipes 110 and the water seepage horizontal pipes 111. By setting the cooperation of the water seepage horizontal pipes 111 and the water seepage vertical pipes 110, cooling water can enter the water seepage vertical pipes 110 and the water seepage horizontal pipes 111 through the water outlet pipe 120, and penetrate into the concrete through the water seepage holes of the water seepage vertical pipes 110 and the water seepage horizontal pipes 111 to cool the concrete. On the upper side of the above-mentioned water seepage horizontal pipes 111, 4-9 spray pipes 130 are fixedly connected at equal intervals. A spray pipe 131 is fixedly connected to the upper side of the spray pipes 130. Spray holes are evenly formed in the outer side of the spray pipe 131. Generally speaking, the surface temperature of the concrete is lower than its internal temperature. Therefore, first, the heat in the concrete inside the water seepage horizontal pipes and the water seepage vertical pipes is replaced by the cooling water, absorbing a part of the heat inside the concrete and increasing the temperature of a part of the cooling water. Then, after the cooling water is discharged from the water seepage horizontal pipes and the water seepage vertical pipes through the spray pipes, the cooling effect on the concrete surface is not as strong as that on its internal part. Instead, it indirectly balances the temperature inside the concrete and improves the efficiency of concrete hardening.

[0030] Further, as Figure 1 shown, a water pump 210 is installed on the right side of the water storage tank 200. The water pump 210 is installed on the ground. The right side of the water pump 210 is fixedly connected to the left side of the water seepage horizontal pipe 111. The lower half parts of the first shunt pipe group 100, the water seepage horizontal pipe 111, the water seepage vertical pipe 110 and the spray pipe 130 are all placed into the concrete. By setting the cooperation of the water pump 210, the water storage tank 200, the water seepage horizontal pipe 111, the water outlet pipe 120 and the water seepage vertical pipe 110, cooling water can enter the interiors of the water seepage horizontal pipe 111 and the water seepage vertical pipe 110, and cool the concrete through the water seepage horizontal pipe 111 and the water seepage vertical pipe 110.

[0031] Embodiment 2 is different from Embodiment 1 in that, as Figure 2 and Figure 3 shown, a sleeve 132 is sleeved on the outer side of the spray pipe 130. A plurality of connecting frames 133 are fixedly connected to the outer sides of the plurality of sleeves 132. A first air pump 134 is fixedly arranged on the lower side of the connecting frame 133. The first air pump 134 is installed on the concrete. The telescopic end of the first air pump 134 is fixedly connected to the connecting frame 133.

[0032] Embodiment 3 is different from Embodiment 2 in that, as Figure 2As shown, a return water pipe 220 is fixedly connected to the right side of the water storage tank 200. A second shunt pipe group 230 is fixedly connected to the return water pipe 220. A plug pipe 240 matching the sleeve 132 is fixedly connected to the lower side of the second shunt pipe group 230. By arranging the sleeve 132, the connecting frame 133, the first air pump 134, the return water pipe 220 and the second shunt pipe group 230 to cooperate, the cooling water in the water seepage horizontal pipe 111 and the water seepage vertical pipe 110 can be circulated back to the water storage tank 200. The cooling water in the water seepage horizontal pipe 111 and the water seepage vertical pipe 110 will cool the water seepage horizontal pipe 111 and the water seepage vertical pipe 110. The water seepage horizontal pipe 111 and the water seepage vertical pipe 110 absorb the heat of the external concrete to cool the concrete. The water seepage horizontal pipe 111 and the water seepage vertical pipe 110 take away the heat in the concrete and return to the water storage tank 200 to form a cycle.

[0033] Example 4, the difference from Example 3 is that, as Figure 2 and Figure 5 shown, a baffle 250 is fixedly connected to the outside of the plug pipe 240. A acting pad 260 is fixedly connected to the lower side of the baffle 250. A rubber pad is arranged on the inner wall of the sleeve 132. By arranging the baffle 250, the gap between the plug pipe 240 and the sleeve 132 can be blocked. The material of the acting pad 260 is rubber. By arranging the acting pad 260, the gap between the baffle 250 and the upper end of the sleeve 132 can be plugged to prevent the cooling water from moving out, improving the stability of the device during use.

[0034] Furthermore, as Figure 2 and Figure 6 shown, two guide rods 270 are fixedly connected to the lower side of the baffle 250. Limit plates 135 are fixedly connected to the left and right sides of the sleeve 132. The limit plates 135 are provided with insertion holes matching the sleeve 132. By arranging the guide rods 270 to cooperate with the limit plates 135, the spray pipe 131 can be limited. When the spray pipe 130 is slightly inclined after long-term use, the sleeve 132 can be guided to enter the lower side of the plug pipe 240 through the limitation of the guide rods 270 and the limit plates 135.

[0035] Example 5, the difference from Example 4 is that, as Figure 4 shown, a connecting water pipe 211 is fixedly connected to the left side of the water pump 210. The left side of the connecting water pipe 211 extends to the bottom of the inner cavity of the water storage tank 200 and is fixedly connected with a filter pipe 212. By arranging the filter pipe 212 to filter the water source entering the water pump 210, impurities in the cooling water are prevented from entering the water seepage horizontal pipe 111 and the water seepage vertical pipe 110, avoiding damage and blockage of the water seepage horizontal pipe 111 and the water seepage vertical pipe 110, and improving the stability of the device during use.

[0036] Example 6, the difference from Example 5 is that, as Figure 4As shown, a control switch 136 is fixedly installed on the upper side of the spray pipe 130. By setting the control switch 136, when pressure needs to be applied to the water seepage horizontal pipe 111 and the water seepage vertical pipe 110, the control switch 136 is closed, and then the water seepage horizontal pipe 111 and the water seepage vertical pipe 110 are pressurized, so that the cooling water in the water seepage horizontal pipe 111 and the water seepage vertical pipe 110 can enter the concrete at a faster speed, thereby reducing the temperature of the concrete.

[0037] Example 7, the difference from Example 6 is that, as Figure 4 shown, temperature monitors 201 are installed on both the upper and lower sides of the inner wall of the reservoir 200. By setting the temperature monitors 201 to detect the stability of the cooling water, if the temperature of the cooling water is too high, new cooling water needs to be introduced from the outside. The cooling water is tap water.

[0038] Working principle: When the solution of the present invention is specifically implemented, the first shunt pipe group 100, the water seepage horizontal pipe 111, the water seepage vertical pipe 110 and the lower half of the spray pipe 130 are all placed into the concrete, and the first air pump 134 is installed on the upper side of the concrete. The first shunt pipe group 100 is made of sediment, so it can block the external temperature and sunlight. The cooling water in the first shunt pipe group 100 will cool down by itself because the material of the first shunt pipe group 100 blocks the external sunlight and heat. Start the water pump 210, the cooling water is filtered through the filter pipe 212 and then enters the water outlet pipe 120 through the connecting water pipe 211. After passing through the water outlet pipe 120, the cooling water enters the water seepage vertical pipe 110 and the water seepage horizontal pipe 111, and seeps into the concrete through the water seepage holes of the water seepage vertical pipe 110 and the water seepage horizontal pipe 111 to cool the concrete. At the same time, the cooling water in the water seepage horizontal pipe 111 and the water seepage vertical pipe 110 will cool the water seepage horizontal pipe 111 and the water seepage vertical pipe 110. The water seepage horizontal pipe 111 and the water seepage vertical pipe 110 absorb the heat of the external concrete to cool the concrete. After passing through the water seepage vertical pipe 110 and the water seepage horizontal pipe 111, the cooling water enters the spray pipe 130, and is sprayed onto the upper side of the concrete through the spray holes of the spray pipe 131 to cool the upper side of the concrete.

[0039] When the temperature of the upper side of the concrete has dropped and enough cooling water has been sprayed on the upper side of the concrete, start the first air pump 134. Drive the connecting frame 133 to move downward through the first air pump 134. Drive the sleeve 132 to move upward through the downward movement of the connecting frame 133. When the sleeve 132 moves upward, drive the limit plate 135 to move upward. The limit plate 135 moves upward under the limit of the guide rod 270 and limits the sleeve 132 at the same time, avoiding the phenomenon that the spray pipe 130 is inclined during long-term use, resulting in the sleeve 132 not being able to be correctly docked with the insertion pipe 240. The sleeve 132 moves upward and sleeves on the outside of the spray pipe 131. The sleeve 132 continues to move upward and sleeves on the lower side of the insertion pipe 240. The sleeve 132 covers the insertion pipe 240 and the spray pipe 131, so that the cooling water cannot leak out from the outside of the spray pipe 131 and can only move into the insertion pipe 240, and then returns to the inner cavity of the first shunt pipe group 100 through the second shunt pipe group 230 and the return water pipe 220 to complete the cycle. When the sleeve 132 moves upward, it will be blocked by the baffle 250, and then the gap between the baffle 250 and the upper end of the sleeve 132 is blocked by the acting pad 260, avoiding the cooling water from moving out from it, and improving the stability of the device during use.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large-volume concrete construction and curing system, characterized in that: It includes a first shunt pipe group (100) and a water storage tank (200). A plurality of groups of vertical water seepage pipes (110) are connected to the upper side of the first shunt pipe group (100) at equal distances. A plurality of groups of the vertical water seepage pipes (110) are connected to a horizontal water seepage pipe (111) at equal distances. Water seepage openings are formed in both the vertical water seepage pipes (110) and the horizontal water seepage pipe (111). A plurality of groups of spray pipes (130) are arranged on the upper side of the horizontal water seepage pipe (111) at equal distances. A spray pipe (131) with spray holes is connected to the upper side of the spray pipe (130). The water storage tank (200) is connected to the horizontal water seepage pipe (111) through a water pump (210). A sleeve (132) is connected to the outer side of the spray pipe (130). A connecting frame (133) is connected to the outer sides of a plurality of groups of the sleeves (132). A first air pump (134) is arranged on the lower side of the connecting frame (133). The telescopic end of the first air pump (134) is connected to the connecting frame (133). The water storage tank (200) is connected to a second shunt pipe group (230) through a return pipe (220). An insertion pipe (240) that matches the sleeve (132) is connected to the lower side of the second shunt pipe group (230). A baffle (250) is connected to the outer side of the insertion pipe (240). Two guide rods (270) are connected to the lower side of the baffle (250). Limiting plates (135) are connected to the left and right sides of the sleeve (132). Insertion holes that match the sleeve (132) are formed in the limiting plates (135).

2. The mass concrete construction and curing system according to claim 1, characterized in that: A function pad (260) is arranged on the lower side of the baffle (250). A rubber layer is arranged on the inner wall of the sleeve (132).

3. The mass concrete construction and curing system according to claim 1 or 2, characterized in that: A connecting water pipe (211) is connected to the side of the water pump (210) close to the water storage tank (200). The connecting water pipe (211) extends into the water storage tank (200) and is connected to a filter pipe (212).

4. The mass concrete construction and curing system according to claim 3, wherein: A control switch (136) is connected to the upper side of the spray pipe (130).

5. The large-volume concrete construction and curing system according to claim 4, characterized in that: Temperature monitors (201) are installed on both the upper and lower sides of the inner wall of the water storage tank (200).

6. A maintenance method for a large-volume concrete construction maintenance system according to any one of claims 1 to 5, characterized in that: Include putting the first shunt pipe group (100), the water seepage horizontal pipe (111), the water seepage vertical pipe (110), and the lower half of the spray pipe (130) all into the concrete. Install the first air pump (134) on the upper side of the concrete. Start the water pump (210). Through the water pump (210), suck out the cooling water in the first shunt pipe group (100) and send it into the water outlet pipe (120). The first shunt pipe group (100) is made of mud and sand, so it can block the external temperature and sunlight. The cooling water in the first shunt pipe group (100) is blocked by the material of the first shunt pipe group (100) from the external sunlight and heat, so it will cool down by itself. The cooling water passes through the filter pipe (212) and then enters the water outlet pipe (120) through the connecting water pipe (211). The cooling water enters the water seepage vertical pipe (110) and the water seepage horizontal pipe (111) through the water outlet pipe (120), and seeps into the concrete through the water seepage holes of the water seepage vertical pipe (110) and the water seepage horizontal pipe (111) to cool the concrete. At the same time, the cooling water in the water seepage horizontal pipe (111) and the water seepage vertical pipe (110) will cool the water seepage horizontal pipe (111) and the water seepage vertical pipe (110). The water seepage horizontal pipe (111) and the water seepage vertical pipe (110) absorb the heat of the external concrete to cool the concrete. The cooling water enters the spray pipe (130) after passing through the water seepage vertical pipe (110) and the water seepage horizontal pipe (111), and sprays the cooling water onto the upper side of the concrete through the spray holes of the spray pipe (131) to cool the upper side of the concrete. When the upper side of the concrete has been cooled and enough cooling water has been sprayed on the upper side of the concrete, start the first air pump (134). Drive the connecting frame (133) to move upward through the first air pump (134). Drive the sleeve (132) to move upward through the upward movement of the connecting frame (133). When the sleeve (132) moves upward, drive the limit plate (135) to move upward. The limit plate (135) moves upward under the limit of the guide rod (270) and limits the sleeve (132) at the same time, avoiding the phenomenon that the spray pipe (130) tilts during long-term use and the sleeve (132) cannot be correctly docked with the insertion pipe (240). The sleeve (132) moves upward and sleeves on the outside of the spray pipe (131). The sleeve (132) continues to move upward and sleeves on the lower side of the insertion pipe (240). The insertion pipe (240) and the spray pipe (131) are covered by the sleeve (132), so that the cooling water cannot leak out from the outside of the spray pipe (131) and can only move into the insertion pipe (240), and then return to the inner cavity of the first shunt pipe group (100) through the second shunt pipe group (230) and the water return pipe (220) to complete the cycle. When the sleeve (132) moves upward, it will be blocked by the baffle (250), and then the gap between the baffle (250) and the upper end of the sleeve (132) is blocked by the acting pad (260) to avoid the cooling water from moving out, improving the stability of the device during use.

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