Water spraying device and ball mill

Abstract

The utility model relates to the technical field of cement production equipment, and discloses a water spray device and a ball mill, the water spray device comprises a spray protective sleeve, a spray gun and a bearing, a first mounting end of the protective sleeve can be arranged in a machine body of the ball mill and is connected with the machine body through an outer ring of the bearing, and the spray gun is arranged in a cavity in a penetrating manner; the outer ring of the bearing rotates relative to the inner ring, the protective sleeve and the spray gun do not rotate along with the machine body, cooling liquid is introduced through an inner channel of the spray gun, the spray gun can extend into the machine body through the spraying opening to conduct spraying cooling, a conversion device does not need to be additionally arranged, and bearing connection improves the connection stability of the first installation end of the protective sleeve; the protective sleeve effectively protects the spray gun, reduces the damage influence of high temperature in the machine body on the spray gun, ensures stable operation of the water spraying device, is beneficial to prolonging the service life, and further reduces the part replacement frequency and cost.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production equipment, in particular to a water spraying device and a ball mill. Background Art

[0002] In the prior art, ball mills pipe cooling water to a converter mounted on the mill's hollow shaft. The water then flows through the converter and into a spray gun mounted at the mill's rear end, spraying the cement inside to cool it. This water spraying method is not only structurally complex, but also uses a rubber seal to seal the converter and the barrel. As the mill rotates, the relative motion between the seal, the converter housing, and the barrel causes wear on the seal. Severe wear affects the stable operation of the water spraying mechanism, resulting in a short service life and high replacement costs and labor. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems in the prior art. To this end, the utility model proposes a water spraying device capable of stable operation.

[0004] In the first aspect, a water spraying device according to an embodiment of the present invention is applied to a ball mill, and the water spraying device includes a protective sleeve, a spray gun and a bearing; the protective sleeve has a first mounting end and a second mounting end along a first direction, and the interior of the protective sleeve has a cavity connecting the first mounting end and the second mounting end; the spray gun is arranged in the cavity, and the interior of the spray gun is provided with a channel for connecting to a water source, and one end of the spray gun is provided with a spray port connected to the channel, and the spray port is exposed through the first mounting end; the inner ring of the bearing is connected to the first mounting end, and the first mounting end is suitable for being arranged inside the ball mill and connected to the body of the ball mill through the outer ring of the bearing.

[0005] The water spraying device of the embodiment of the present invention has at least the following beneficial effects: when applied to a ball mill, the first mounting end of the protective sleeve can be arranged in the body of the ball mill and connected to the body through the outer ring of the bearing. The spray gun is arranged in the cavity. When the body rotates, the outer ring of the bearing rotates relative to the inner ring, and the protective sleeve and the spray gun may not rotate with the body. The coolant is introduced through the internal channel of the spray gun, and the spray gun can be extended into the interior of the body through the injection port to spray and cool down. There is no need for a separate conversion device. The bearing connection improves the stability of the connection of the first mounting end of the protective sleeve. The protective sleeve effectively protects the spray gun, reduces the damage caused by the high temperature inside the body to the spray gun, ensures the stable operation of the water spraying device, and is conducive to improving the service life, thereby reducing the frequency and cost of replacement parts.

[0006] According to the water spraying device of an embodiment of the present invention, the water spraying device also includes a fixing frame, and the spray gun has a connecting end at one end away from the injection port along the first direction, and the connecting end is exposed from the second mounting end and connected to the fixing frame, and the fixing frame is used to support the connecting end.

[0007] According to the water spraying device of the embodiment of the present invention, the fixing frame includes a support and a fixing member, a mounting hole that is conductive along the first direction is defined between the fixing member and the support, and the connecting end is inserted into the mounting hole.

[0008] According to the water spraying device of an embodiment of the present invention, the fixing member has two ends along a second direction, and the second direction is perpendicular to the first direction, wherein: one of the two ends of the fixing member is rotatably connected to the support, and the other is detachably connected to the support; or, the two ends of the fixing member are respectively detachably connected to the support.

[0009] According to the water spraying device of an embodiment of the present invention, the fixing bracket further includes a fastener, which is connected to the fixing member, and at least a portion of the fastener is located in the mounting hole for abutting the connecting end.

[0010] According to the water spraying device of the embodiment of the present invention, the outer wall of the protective sleeve is covered with a wear-resistant layer.

[0011] According to the water spraying device of the embodiment of the present utility model, along the first direction, the end of the injection port is flush with the end of the first mounting end.

[0012] In the second aspect, the ball mill according to the embodiment of the present utility model includes a water spraying device of any embodiment of the first aspect mentioned above; the body includes a cylinder and a partition plate, the cylinder has a accommodating cavity inside, the cylinder is formed with a grinding inlet and a grinding outlet, the partition plate is in the accommodating cavity and connected to the cylinder, and the partition plate is provided with a first connecting hole that passes through along the first direction; the outer ring of the bearing is connected to the first connecting hole, the second mounting end of the protective sleeve is connected to the cylinder, and the injection port is used to spray water into the accommodating cavity.

[0013] The ball mill of the embodiment of the present invention has at least the following beneficial effects: when in use, the first mounting end of the protective sleeve and the first connecting hole of the partition plate pass through the bearing, and the spray gun is arranged in the cavity. When the body rotates, the protective sleeve and the spray gun can rotate independently of the body. The coolant is introduced through the internal channel of the spray gun, and the spray gun can be extended into the accommodating cavity through the injection port for spraying and cooling. There is no need for a separate conversion device. The bearing connection improves the stability of the connection of the first mounting end of the protective sleeve. The protective sleeve effectively protects the spray gun, reduces the damage caused by the high temperature inside the body to the spray gun, ensures the stable operation of the water spray device, and is conducive to improving the service life, thereby reducing the frequency and cost of replacement parts.

[0014] According to the ball mill of an embodiment of the present invention, the machine body also includes an inlet mill chute, which is connected to the cylinder and communicates with the inlet mill port, and the inlet mill chute is provided with a second connecting hole, which is coaxial with the first connecting hole, and the second mounting end is passed through the second connecting hole and connected to the inlet mill chute, and the end of the spray gun away from the injection port along the first direction is located outside the inlet mill chute.

[0015] According to the ball mill of an embodiment of the present invention, the water spraying device also includes a fixed frame, and the spray gun has a connecting end at one end away from the injection port along the first direction, and the connecting end is exposed from the second mounting end and connected to the fixed frame. The fixed frame is located outside the mill inlet chute and is used to support the connecting end.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a water spray device according to an embodiment of the present utility model;

[0018] Figure 2 A schematic diagram of a ball mill equipped with a water spray device according to an embodiment of the present application;

[0019] Figure 3 for Figure 2 A local enlarged schematic diagram of point A in FIG;

[0020] Figure 4 for Figure 2 A partial enlarged schematic diagram of point B in FIG.

[0021] Reference numerals:

[0022] Cylinder 100; accommodating cavity 110; grinding inlet 120;

[0023] Partition plate 200; first connecting hole 210;

[0024] Water spray device 300;

[0025] Protective cover 310; first mounting end 311; second mounting end 312; cavity 313;

[0026] Spray gun 320; injection port 321; connection end 322; channel 323; air channel 324; liquid inlet 325; air inlet 326;

[0027] Bearing 330; inner ring 331; outer ring 332;

[0028] Fixing frame 340; support 341; fixing member 342; fastener 343; screw 344;

[0029] Inlet grinding pipe 400; second connecting hole 410. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the concept and technical effects of the present invention in conjunction with the embodiments to fully understand the purpose, features, and effects of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without inventive effort are also within the scope of protection of the present invention.

[0031] In the description of the embodiments of the present invention, if orientation descriptions are involved, the orientations or positional relationships indicated by "up", "down", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of the embodiments of the present utility model, if a certain feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected on the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present utility model, if "several" is involved, it means more than one; if "multiple" is involved, it means more than two; if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself; if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In cement production, if the ball mill works at high temperature for a long time, it is easy to cause problems such as ball paste and gypsum dehydration, which not only damages the ball mill itself, but also causes the quality of the abrasive to be unqualified and the hourly output to be reduced. The main function of spraying water in the ball mill is to reduce the temperature inside the mill, thereby improving the output of the ball mill and the quality of cement. In the related art, cooling water is transported through a pipe to a conversion device on the hollow shaft of the mill. After passing through the conversion device, the cooling water enters the spray gun installed at the end of the mill through a pipe to spray the cement in the mill to cool it down. This water spraying method is not only complex in structure, but also when the mill rotates, the sealing ring between the conversion device and the cylinder is easily worn due to relative motion friction. Severe wear of the sealing ring will affect the stable operation of the water spraying device, so the service life is not long, and the cost of replacement parts and labor costs required for replacement are high.

[0034] The embodiment of the utility model provides a stably operating water spraying device and a ball mill having the water spraying device. The water spraying device is used for spraying and cooling inside the ball mill, which is beneficial to the stable operation of the ball mill and improves the output and quality.

[0035] The following describes the embodiments of the present invention in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic structural diagram of a water spray device according to an embodiment of the present utility model. Figure 2 This is a schematic diagram of a ball mill equipped with a water spray device according to an embodiment of the present application. Figure 3 、 Figure 4 They are Figure 2 A partial enlarged schematic diagram of points A and B in the figure.

[0036] refer to Figures 1 to 4 The ball mill of the embodiment of the present application includes a body and a water spraying device 300. The water spraying device 300 includes a protective sleeve 310, a spray gun 320 and a bearing 330. The protective sleeve 310 has a first mounting end 311 and a second mounting end 312 along a first direction. The interior of the protective sleeve 310 has a cavity 313 connecting the first mounting end 311 and the second mounting end 312; the spray gun 320 is arranged in the cavity 313, and the interior of the spray gun 320 is provided with a channel 323 for connecting to a water source. One end of the spray gun 320 is provided with a jet port 321 connected to the channel 323, and the jet port 321 is exposed through the first mounting end 311; the inner ring 331 of the bearing 330 is connected to the first mounting end 311. The first mounting end 311 is suitable for being arranged inside the ball mill and connected to the body of the ball mill through the outer ring 332 of the bearing 330.

[0037] The body includes a cylinder 100 and a partition plate 200. The cylinder 100 has a accommodating cavity 110 inside, and an inlet grinding port 120 and an outlet grinding port are formed on the cylinder 100. The partition plate 200 is in the accommodating cavity 110 and connected to the cylinder 100. The partition plate 200 is provided with a first connecting hole 210 that passes through in a first direction; the outer ring 332 of the bearing 330 is connected to the first connecting hole 210, the second mounting end 312 of the protective sleeve 310 is connected to the cylinder 100, and the injection port 321 is used to spray water into the accommodating cavity 110.

[0038] When in use, the first mounting end 311 of the protective sleeve 310 and the first connecting hole 210 of the partition plate 200 pass through the bearing 330, and the spray gun 320 is inserted into the cavity 313. When the body rotates, the protective sleeve 310 and the spray gun 320 may rotate independently of the body. The coolant is introduced through the internal channel 323 of the spray gun 320, and the spray gun 320 can be extended into the accommodating cavity 110 through the injection port 321 for spraying and cooling. No additional conversion device is required. The bearing 330 connection improves the stability of the connection of the first mounting end 311 of the protective sleeve 310. The protective sleeve 310 effectively protects the spray gun 320, reduces the damage of the high temperature inside the body to the spray gun 320, ensures the stable operation of the water spraying device 300, and is conducive to improving the service life, thereby reducing the frequency and cost of replacement parts.

[0039] In specific applications, the water spray device 300 can be installed at the grinding head. For example, the water spray device 300 extends from one end of the grinding inlet 120 into the interior of the cylindrical body 100, thereby spraying water at the grinding head of the ball mill. Spraying water at the grinding head effectively controls the material temperature. When the incoming material temperature is very high, spraying water from the grinding head can contact and cool the material earlier, reducing heat accumulation within the mill, thereby lowering the temperature of the entire mill system, facilitating stable operation and extending the service life of the equipment. It also helps reduce problems such as material agglomeration and adhesion caused by high temperatures, thereby improving grinding efficiency and product quality.

[0040] Alternatively, the water spray device 300 can be installed at the mill tail end. For example, the water spray device 300 extends from one end of the mill outlet into the interior of the cylinder 100 to achieve water spraying at the mill tail end of the ball mill. Spraying water at the mill tail end can more effectively cool the high-temperature material accumulated at the mill tail end, allowing the water mist to fully contact and mix with the high-temperature material, improving the uniformity of the material and helping to improve the discharge quality.

[0041] In some embodiments, the protective cover 310 may be a sleeve structure with two ends connected, with the first direction being the direction in which the protective cover 310 extends. The spray gun 320 is disposed within the cavity 313 of the protective cover 310. When the channel 323 is connected to a water source, water can be sprayed toward the exterior of the protective cover 310 through the spray port 321. The protective cover 310 protects the spray gun 320 and ensures smooth spraying from the spray port 321.

[0042] refer to Figure 4 In some embodiments, the interior of the spray gun 320 may further include an air passage 324 for receiving compressed air. The air passage 324 communicates with the injection port 321 or forms an air outlet at the end of the spray gun 320. The air passage 324 and the channel 323 extend in a first direction, respectively, and form an air inlet 326 and a liquid inlet 325 at the end facing away from the injection port 321. The air inlet 326 is adapted to receive a compressed air source, and the liquid inlet 325 is adapted to receive a cooling water source. Thus, compressed air can be introduced into the air passage 324, and cooling water can be introduced into the channel 323. The compressed air and water are sprayed together, causing the water to be sprayed into the mill in an atomized state, which facilitates rapid heat absorption during water evaporation and effectively cools the mill.

[0043] In some embodiments, the ball mill may further include a water pump connected to the channel 323 of the spray gun 320 via a water pipe. For example, the water pump is connected to the liquid inlet 325 on the connection end 322 of the spray gun 320 via a water pipe, thereby delivering cooling water to the channel 323 .

[0044] In some embodiments, the ball mill may further include an air pump connected to the air passage 324 of the spray gun 320 via an air pipe. For example, the air pump is connected to the air inlet 326 on the connection end 322 of the spray gun 320 via an air pipe, thereby delivering compressed gas into the air passage 324 .

[0045] refer to Figures 1 to 3 In some embodiments, along the first direction, the end of the injection port 321 is flush with the end of the first mounting end 311 , which can reduce the exposure of the spray gun 320 and ensure a sufficient range of spraying outside the protective cover 310 .

[0046] The inner ring 331 of the bearing 330 is connected to the first mounting end 311, and the outer ring 332 of the bearing 330 can be connected to the body of the ball mill. This allows the first mounting end 311 of the protective sleeve 310 to be rotatably connected to the body. When the body rotates, the outer ring 332 of the bearing 330 rotates relative to the inner ring 331, while the protective sleeve 310 and the spray gun 320 do not rotate with the body.

[0047] As an example, the bearing 330 may be a sliding bearing, which has the characteristics of stable, reliable and noiseless operation. When used, lubricating oil can be added to the sliding surface to effectively reduce friction loss and surface wear, thereby increasing service life.

[0048] Alternatively, the bearing 330 may also be a rolling bearing, which reduces friction through rolling contact between rolling elements (such as balls or rollers) and the inner and outer rings 332. Therefore, its friction coefficient is relatively small, and its structure is relatively simpler, with a high degree of standardization and easy installation and maintenance.

[0049] The water spray device 300 of the present embodiment is suitable for installation in a ball mill. During use, the first mounting end 311 is adapted to be positioned within the mill and connected to the mill body via the outer ring 332 of the bearing 330. The spray gun 320 is positioned within the cavity 313. When the mill body rotates, the outer ring 332 of the bearing 330 rotates relative to the inner ring 331, while the protective sleeve 310 and spray gun 320 rotate independently of the mill body. Coolant is introduced through the internal passage 323 of the spray gun 320, allowing the spray gun 320 to extend into the mill body through the nozzle 321 for spraying and cooling, eliminating the need for a separate conversion device. The bearing 330 connection improves the stability of the first mounting end 311 of the protective sleeve 310. Furthermore, the bearing 330 offers greater wear resistance than the aforementioned sealing ring. Furthermore, the protective sleeve 310 effectively protects the spray gun 320, minimizing damage to the spray gun 320 from high temperatures within the mill body. This ensures the stable operation of the water spray device 300, extending its service life and reducing the frequency and cost of component replacement.

[0050] In some embodiments, the protective cover 310 can be a tubular structure of a metal matrix. The first mounting end 311 of the protective cover 310 can be welded and fixed to the inner ring 331 of the bearing 330, and the other end can be welded and fixed to the body of the ball mill to ensure the connection stability of the protective cover 310.

[0051] In some embodiments, the outer wall of the protective cover 310 may be coated with a wear-resistant layer. The wear-resistant layer may be made of a material with high temperature resistance and wear resistance, such as a glass fiber and silicone composite layer, a ceramic coating, etc. The wear-resistant layer can effectively reduce wear of the protective cover 310 and extend its service life.

[0052] refer to Figure 1 and Figure 2 In some embodiments, the water spraying device 300 further includes a fixing bracket 340. The spray gun 320 has a connecting end 322 at one end thereof, which is located away from the spray port 321 along the first direction. The connecting end 322 is exposed from the second mounting end 312 of the protective sleeve 310 and is connected to the fixing bracket 340. The fixing bracket 340 is used to support the connecting end 322, further improving the connection stability of the spray gun 320. During use, the fixing bracket 340 can be installed on a bottom surface or other mounting location. For example, the fixing bracket 340 can be placed on the platform of the ball mill, or fixedly connected to the body of the ball mill directly or indirectly through a connector, thereby effectively supporting the spray gun 320.

[0053] refer to Figure 2 and Figure 4In some embodiments, the fixing bracket 340 includes a support 341 and a fixing member 342. A mounting hole extending in a first direction is defined between the fixing member 342 and the support 341. The connection end 322 of the spray gun 320 is inserted into the mounting hole. During installation, the spray gun 320 can be placed in the first direction, with the fixing bracket 340 aligned with the connection end 322 of the spray gun 320. The mounting hole formed by the fixing member 342 and the support 341 is aligned with the connection end 322. The fixing bracket 340 is then moved to insert the connection end 322 into the mounting hole. This facilitates installation and allows for easy adjustment of the support position.

[0054] Among them, the fixing member 342 has two ends along the second direction, and the second direction is perpendicular to the first direction. One of the two ends of the fixing member 342 is rotatably connected to the support 341, and the other is detachably connected to the support 341. Therefore, the mounting hole can be opened and closed by disassembly and installation of one end and rotation of the other end, thereby facilitating the removal of the connecting end 322 of the spray gun 320 from the fixing bracket 340 and the installation of the connecting end 322 of the spray gun 320 to the fixing bracket 340, which is convenient for disassembly, assembly and maintenance.

[0055] Alternatively, the two ends of the fixing member 342 are detachably connected to the support 341 respectively, so that the mounting hole can be opened and closed by disassembling and installing the two ends of the fixing member 342, thereby facilitating the removal of the connecting end 322 of the spray gun 320 from the fixing frame 340 and the installation of the connecting end 322 of the spray gun 320 to the fixing frame 340, which is convenient for disassembly, assembly and maintenance.

[0056] The above-mentioned detachable installation can be a commonly used detachable connection method such as threaded connection through screws 344, clamping connection through buckles, etc.

[0057] In some embodiments, the fixing bracket 340 further includes a fastener 343, which is connected to the fixing bracket 342. At least a portion of the fastener 343 is located within the mounting hole and is configured to abut the connecting end 322, thereby enhancing the stability of the mounting. As an example, the fixing bracket 342 is provided with a threaded hole, which connects the inner wall of the mounting hole and the exterior of the fixing bracket 342. The fastener 343 includes a connecting rod having an external thread structure that matches the threaded hole. The fastener 343 is screwed into the threaded hole via the connecting rod. One end of the connecting rod extends into the mounting hole and abuts the connecting end 322 of the spray gun 320 to achieve locking, thereby strengthening the installation of the connecting end 322 and the fixing bracket 340. Locking and unlocking are achieved by rotating the fastener 343, so that the relative position of the fixing bracket 340 and the spray gun 320 can be adjusted in the unlocked state. This simple structure and convenient operation help reduce operation time.

[0058] refer to Figure 1 and Figure 2In the ball mill of the present embodiment, the mill body may further include a mill inlet chute 400, which is connected to the barrel 100 and communicates with the mill inlet port 120. The mill inlet chute 400 has a second connection hole 410, which is coaxial with the first connection hole 210. The second mounting end 312 is disposed through the second connection hole 410 and connected to the mill inlet chute 400, improving the connection stability of the protective cover 310. After installation, the water spray device 300 can spray the mill head for cooling.

[0059] In some embodiments, the first connecting hole 210 can be arranged at the center position of the cross section of the partition plate 200 perpendicular to the first direction, so that the protective cover 310 and the spray gun 320 inserted in the protective cover 310 can be arranged at the center position of the cross section of the cylinder 100. This is beneficial for the cooling water sprayed from the injection port 321 to diffuse evenly along the radial direction of the cylinder 100, thereby improving the uniformity of the spraying and improving the cooling effect.

[0060] As an example, the second mounting end 312 can be welded to the mill inlet pipe 400, or a flange structure can be provided at the second mounting end 312. The through hole formed at the second mounting end 312 of the cavity 313 of the protective sleeve 310 faces the second connection hole 410, and the flange is secured to the mill inlet pipe 400 via threaded connection. The end of the spray gun 320 facing away from the injection port 321 in the first direction (e.g., the aforementioned connection end 322) is located outside the mill inlet pipe, facilitating the fixing of the spray gun 320 and access to water and gas sources.

[0061] In some embodiments, the water spraying device 300 also includes a fixing frame 340, and the spray gun 320 has a connecting end 322 at one end away from the injection port 321 along the first direction. The connecting end 322 is exposed from the second mounting end 312 and connected to the fixing frame 340. The fixing frame 340 is located outside the grinding inlet pipe 400 and is used to support the connecting end 322, thereby further improving the connection stability of the water spraying device 300.

[0062] As an example, see Figures 1 to 4In specific applications of the water spray device 300 and ball mill according to the embodiment of the present application, the flow rate range of the mill head spray gun 320 and the water pump can be selected based on the heat generation within the mill and the requirements of the cement process to achieve the best cooling effect. Furthermore, the appropriate size of the protective sleeve 310 and bearing 330 is selected based on the size of the spray gun 320. Accordingly, a first connecting hole 210 is opened at the center of the partition plate 200, and the middle portion of the outer ring 332 of the bearing 330 is welded into the circular hole. A second connecting hole 410 is opened at the center of the mill inlet chute 400. The length of the protective tube is determined based on the distance from the opening of the mill inlet chute 400 to the end face of the bearing 330. The ends of the protective sleeve 310 are welded and secured to the hole in the mill inlet chute 400 and the inner ring 331 of the bearing 330, respectively. A mounting bracket 340 for the spray gun 320 is fabricated on the grinding head platform. The length of the spray gun 320 is determined based on the distance from the mounting bracket 340 to the sliding bearing 330. The rear connection end 322 of the grinding head spray gun 320 is mounted on the mounting bracket 340. The entire spray gun 320 passes through the spray gun 320 protective sleeve 310, and the end of the spray gun 320 with the spray port 321 is flush with the end of the spray gun 320 protective sleeve 310 (the first mounting end 311). The grinding head spray gun 320 is connected to a water pump via a pipe. During operation, the central control operator remotely activates the cooling water pump. The cooling water is pressurized by the pump and then delivered through a delivery pipe to the channel 323 of the grinding head spray gun 320. The cooling water is then sprayed from the spray port 321 at the head of the spray gun 320 onto the cement inside the mill, cooling the cement. An electric regulating valve is installed in the middle of the cooling water delivery pipe, allowing the central control operator to adjust the cooling water flow online based on the temperature of the cement at the end of the mill.

[0063] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A water spray device suitable for installation in a ball mill, characterized in that: include: The protective cover has a first mounting end and a second mounting end along a first direction, and the interior of the protective cover has a cavity communicating with the first mounting end and the second mounting end; a spray gun, which is inserted into the cavity, wherein a passage for connecting to a water source is provided inside the spray gun, and an injection port connected to the passage is provided at one end of the spray gun, and the injection port is exposed to the outside through the first mounting end; A bearing, wherein the inner ring of the bearing is connected to the first mounting end, and the first mounting end is suitable for being arranged inside the ball mill and connected to the body of the ball mill through the outer ring of the bearing.

2. The water spraying device according to claim 1, characterized in that The water spraying device also includes a fixing frame. The spray gun has a connecting end at one end away from the injection port along the first direction. The connecting end is exposed from the second mounting end and connected to the fixing frame. The fixing frame is used to support the connecting end.

3. The water spraying device according to claim 2, characterized in that The fixing frame includes a support and a fixing member. A mounting hole that is conductive along the first direction is defined between the fixing member and the support, and the connecting end is passed through the mounting hole.

4. The water spraying device according to claim 3, characterized in that The fixing member has two ends along a second direction, the second direction being perpendicular to the first direction, wherein: One of the two ends of the fixing member is rotatably connected to the support, and the other is detachably connected to the support; Alternatively, the two ends of the fixing member are detachably connected to the support respectively.

5. The water spraying device according to claim 3, characterized in that: The fixing bracket further includes a fastener connected to the fixing member, and at least a portion of the fastener is located in the mounting hole for abutting against the connecting end.

6. The water spraying device according to claim 1, characterized in that The outer wall of the protective sleeve is covered with a wear-resistant layer.

7. The water spraying device according to claim 1, characterized in that Along the first direction, an end of the injection port is flush with an end of the first mounting end.

8. A ball mill, characterized in that: include: The machine body includes a cylinder and a partition plate, wherein the cylinder has an accommodating cavity inside, and a grinding inlet and a grinding outlet are formed on the cylinder. The partition plate is located in the accommodating cavity and connected to the cylinder, and a first connecting hole is provided on the partition plate that passes through along the first direction; The water spraying device according to any one of claims 1 to 7, wherein the outer ring of the bearing is connected to the first connecting hole, the second mounting end of the protective sleeve is connected to the cylinder, and the injection port is used to spray water into the accommodating cavity.

9. The ball mill according to claim 8, characterized in that The machine body also includes an inlet mill chute, which is connected to the cylinder and communicates with the inlet mill port. The inlet mill chute is provided with a second connecting hole, which is coaxial with the first connecting hole. The second mounting end is passed through the second connecting hole and connected to the inlet mill chute. The end of the spray gun facing away from the injection port along the first direction is located outside the mill chute.

10. The ball mill according to claim 9, characterized in that The water spraying device also includes a fixing frame, and the spray gun has a connecting end at one end away from the injection port along the first direction. The connecting end is exposed from the second mounting end and connected to the fixing frame. The fixing frame is located outside the grinding inlet pipe and is used to support the connecting end.

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