Grinding device for desulfurized stone powder production

Abstract

The utility model discloses a kind of grinding devices for desulfurization stone powder production, including shell, feed inlet being opened in the top of shell, a pair of opposite rotation's grinding roller for grinding stone powder is arranged in the inside of shell, grinding device further includes secondary grinding mechanism and transmission crushing mechanism;Secondary grinding mechanism is arranged in the side of shell, and secondary grinding mechanism includes filter screen, connecting channel, spiral feeding portion and reflux channel;Filter screen is slidably arranged in the bottom of shell, and filter screen is below grinding roller, and filter screen is used to accept stone powder after grinding;Connecting channel is arranged in the side of shell, and the opening in the side of filter screen is opened in the side of shell, and opening is connected with connecting channel through connection;Spiral feeding portion is arranged in the side of shell, by setting secondary grinding mechanism, the problem that stone powder dust and unqualified stone powder need artificial secondary input grinding in grinding process is solved, and the effect of improving grinding qualification rate and reducing manual intervention is achieved.

Description

Technical Field

[0001] This utility model relates to the field of stone powder grinding technology, and more specifically, it relates to a grinding device for the production of desulfurized stone powder. Background Technology

[0002] With increasingly stringent environmental protection requirements, desulfurization stone powder, as an important industrial raw material, plays a crucial role in flue gas desulfurization treatment in many industries such as power, metallurgy, and chemicals. Its quality directly affects the desulfurization effect and the environmental compliance of enterprises. Therefore, the particle size requirements for desulfurization stone powder are becoming increasingly stringent, which necessitates efficient and precise grinding equipment.

[0003] Currently, there are many types of grinding devices for desulfurized stone powder production on the market, with similar basic structures and working principles. These devices typically use grinding components to impact, squeeze, and rub the stone powder raw material entering the grinding chamber to crush and grind it to the required fineness. During the grinding process, to ensure that the particle size of the final product meets the standards, a filter screen structure is generally installed at the discharge port of the grinding device. Only stone powder particles smaller than the filter screen pore size can pass through the filter screen smoothly and be discharged, while larger, unqualified stone powder particles are intercepted.

[0004] However, existing grinding devices have a significant drawback in practical applications: they cannot easily handle the secondary crushing and grinding of larger, substandard stone powder intercepted at the filter screen. When larger stone powder accumulates at the filter screen, the machine usually needs to be stopped, and these substandard stone powders must be manually removed from the device and returned to the grinding chamber for re-grinding. This method is not only cumbersome, consuming a lot of manpower and time, and reducing production efficiency, but also wastes energy and causes additional equipment wear and tear during shutdowns and restarts. Furthermore, manual operation poses certain safety hazards, and it is difficult to ensure that all substandard stone powder is accurately returned to the grinding chamber, potentially leading to the omission of some larger stone powders, which affects the overall quality and particle size uniformity of the final product. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a grinding device for the production of desulfurized stone powder with a secondary grinding mechanism.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This utility model is further configured as follows: it includes a casing, a feed inlet at the top of the casing, a pair of relatively rotating grinding rollers inside the casing for grinding stone powder, and a secondary grinding mechanism and a transmission crushing mechanism. The secondary grinding mechanism is located on the side of the casing and includes a filter screen, a connecting channel, a spiral feeding section, and a return channel. The filter screen is slidably located at the bottom of the casing and below the grinding rollers, and is used to receive the ground stone powder. The connecting channel is located on the side of the casing, and an opening is provided on the side of the casing above the filter screen, which is connected to the connecting channel. The spiral feeding section is located on the side of the casing and is used to assist in crushing and lifting the unqualified products after the initial grinding. The return channel is located at the top of the spiral feeding section and is connected to the feed inlet. The transmission crushing mechanism is located at the top of the casing and is used to perform preliminary crushing of the stone powder fed into the feed inlet.

[0008] By adopting the above technical solution, the problems of stone powder dust and the need for manual secondary grinding of unqualified stone powder during the grinding process have been solved, thereby achieving the effect of improving the grinding qualification rate and reducing manual intervention.

[0009] The present invention is further configured such that: the secondary grinding mechanism includes an air intake channel, a first air pump and a second air pump; the air intake channel is located on the side of the housing, and a cuboid opening is provided on the side of the housing above the filter screen and communicating with the air intake channel; the first air pump is located on the side of the housing and is connected to the air intake channel, and the first air pump is used to blow air through the air intake channel to the top of the filter screen; the second air pump is located on the side of the return channel.

[0010] The present invention is further configured such that: the secondary grinding mechanism includes a guide part, a return spring and a vibration motor; there are multiple guide parts and they are respectively disposed inside the housing, and the multiple guide parts are used to limit the sliding of the filter screen; there are multiple return springs and they are respectively sleeved on the outside of the guide parts, and the two ends of the multiple return springs are respectively fixedly connected to the guide part and the filter screen; there are a pair of vibration motors and they are respectively disposed inside the housing, and the pair of vibration motors are both located below the filter screen.

[0011] The present invention is further configured such that: the secondary grinding mechanism also includes a flexible plate; there are multiple flexible plates respectively disposed inside the housing, and the multiple flexible plates are all located above the filter screen.

[0012] The present invention is further configured such that: the transmission crushing mechanism includes a first synchronous pulley, a second synchronous pulley, a synchronous belt, and a crushing part; the first synchronous pulley is disposed on the outside of the grinding roller and is fixedly connected to the grinding roller; the second synchronous pulley is disposed on the side of the machine housing and is located above the first synchronous pulley; the synchronous belt is disposed on the side of the machine housing and is connected to the first synchronous pulley and the second synchronous pulley respectively; the crushing part is rotatably disposed on the top of the machine housing and is located above the feed inlet.

[0013] The present invention is further configured such that: the transmission crushing mechanism includes a rotating rod and a contact part; the rotating rod is rotatably disposed on the top of the housing and is fixedly connected to the second synchronous wheel; the contact part has a pair and is disposed on the outside of the rotating rod respectively, and when the rotating rod rotates, it can drive the contact part to intermittently contact the crushing part.

[0014] The present invention is further configured such that: the transmission crushing mechanism also includes a limiting part; the limiting part is disposed on the top of the housing and is located on the side of the crushing part, and the limiting part is used to limit the rotation range of the crushing part.

[0015] By adopting the above technical solution, the problem of separate setting of traditional grinding and crushing devices is solved, and the crushing and grinding devices are integrated into one unit.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] (1) By setting up a secondary grinding mechanism, the stone powder to be crushed is fed into the feed inlet. When the stone powder falls above the grinding rollers, a pair of grinding rollers rotate relative to each other to grind the stone powder. The ground stone powder falls above the filter screen, which is used to filter out qualified stone powder. Qualified stone powder falls naturally, while larger particles of stone powder remain above the filter screen. At this time, the solenoid valve controls the closing plate to open, and the larger particles of stone powder enter the upper part of the spiral feeding section through the connecting channel. An installation part is provided on the side of the machine casing for installing the spiral feeding section. A servo motor is set at the bottom of the installation part to drive the spiral feeding section to rotate. When the servo motor starts, the spiral feeding section rotates, conveying the larger particles of stone powder to the return channel position in a spiral upward manner. The stone powder re-enters the feed inlet through the return channel, realizing the secondary effective grinding of the unqualified larger particles of stone powder after grinding.

[0018] (2) By setting up a transmission crushing mechanism, when the second synchronous wheel rotates, it can drive the rotating rod and the contact part to rotate synchronously. When the contact part rotates, it can intermittently contact the crushing part, thereby making the crushing part reciprocate in a rotating and oscillating state, realizing the action of driving the crushing part to crush stone powder, solving the problem of the traditional separate setting of grinding device and crushing device, and making the crushing device and grinding device integrated. Attached Figure Description

[0019] Figure 1 This is a partial cross-sectional three-dimensional structural view of a grinding device for producing desulfurized stone powder according to the present invention;

[0020] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 3 This is a three-dimensional structural diagram of a grinding device for producing desulfurized stone powder according to the present invention.

[0022] Figure 4 for Figure 1 Enlarged structural diagram at point B;

[0023] Figure 5 This is a three-dimensional structural diagram of the transmission crushing mechanism of a grinding device for desulfurized stone powder production according to this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the crushing section of a grinding device for producing desulfurized stone powder according to this utility model;

[0025] Explanation of reference numerals in the attached drawings: 1. Machine casing; 2. Grinding roller; 3. Secondary grinding mechanism; 31. Filter screen; 32. Connecting channel; 33. Spiral feeding section; 34. Return channel; 35. Air inlet channel; 36. First air pump; 37. Second air pump; 38. Guide section; 39. Return spring; 391. Vibrating motor; 392. Flexible plate; 4. Transmission crushing mechanism; 41. First synchronous pulley; 42. Second synchronous pulley; 43. Synchronous belt; 44. Crushing section; 45. Rotating rod; 46. Contact section; 47. Limiting section. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] Please see Figure 1-6 The present invention provides the following technical solution:

[0029] Example 1 includes a housing 1, a feed inlet at the top of the housing 1, and a pair of opposing rotating grinding rollers 2 disposed inside the housing 1 for grinding stone powder. The grinding device also includes a secondary grinding mechanism 3 and a transmission crushing mechanism 4. The secondary grinding mechanism 3 is disposed on the side of the housing 1 and includes a filter screen 31, a connecting channel 32, a spiral feeding section 33, and a return channel 34. The filter screen 31 is slidably disposed at the bottom of the housing 1 and is located below the grinding rollers 2. The filter screen 31 is used to receive the ground stone powder. The connecting channel... The filter screen 31 is located on the side of the housing 1, and the side of the housing 1 has an opening located above the filter screen 31. The opening is connected to the connecting channel 32. The spiral feeding part 33 is located on the side of the housing 1. The spiral feeding part 33 is used to assist in crushing and lifting the unqualified products after the initial grinding. The return channel 34 is located on the top of the spiral feeding part 33 and is connected to the feed inlet. The transmission crushing mechanism 4 is located on the top of the housing 1. The transmission crushing mechanism 4 is used to perform preliminary crushing of the stone powder fed into the feed inlet.

[0030] Specifically, a closing plate is installed inside the connecting channel 32 to switch between open and closed states. A solenoid valve is installed at the top of the connecting channel 32 to control the opening and closing of the closing plate. When the filter screen 31 sieves the crushed and ground stone powder, the solenoid valve drives the closing plate to close, preventing the thrown stone powder from falling into the connecting channel 32. A pair of grinding rollers 2 are fitted with meshing gears on their outer sides. One of the grinding rollers 2 is equipped with a first rotary driver, preferably a servo motor. When the servo motor starts, it drives one of the grinding rollers 2 to rotate, which in turn drives the other grinding roller 2 to rotate relative to it via the meshing gears, thus achieving the grinding operation of the stone powder. First, the stone powder to be crushed is fed into the feed inlet. When the stone powder falls above the grinding rollers 2, the pair of grinding rollers 2 rotate relative to each other, grinding the stone powder. The ground stone powder falls above the filter screen 31, which filters out qualified stone powder. Qualified stone powder falls naturally, while larger particles remain above the filter screen 31. At this time, the solenoid valve controls the closing plate to open, and larger stone powder particles enter the area above the spiral feeding section 33 through the connecting channel 32. An installation part is provided on the side of the casing 1 for mounting the spiral feeding section 33. A servo motor is installed at the bottom of the installation part to drive the spiral feeding section 33 to rotate. When the servo motor starts, the spiral feeding section 33 rotates, conveying the larger stone powder particles to the return channel 34 in a spiral upward manner. The stone powder re-enters the feed inlet through the return channel 34, achieving effective secondary grinding of the larger stone powder particles that were not qualified after grinding.

[0031] See Figure 1The secondary grinding mechanism 3 also includes an air intake channel 35, a first air pump 36, and a second air pump 37. The air intake channel 35 is located on the side of the housing 1, and a cuboid opening is provided on the side of the housing 1 above the filter screen 31 and communicating with the air intake channel 35. The first air pump 36 is located on the side of the housing 1 and is connected to the air intake channel 35. The first air pump 36 is used to blow air through the air intake channel 35 to the top of the filter screen 31. The second air pump 37 is located on the side of the return channel 34.

[0032] Specifically, a sealing plate is installed inside the air intake channel 35 to control its opening and closing. The opening and closing of the sealing plate is controlled by a solenoid valve. During the grinding process, the sealing plate remains closed to prevent stone powder from falling into the air intake channel 35. When the ground stone powder falls above the filter screen 31, the solenoid valve controls the sealing plate to open. Subsequently, the first air pump 36 starts, blowing air through the air intake channel 35. During the blowing process, larger, unqualified stone powder particles remaining above the filter screen 31 are blown away and guided into the connecting channel 32. At this time, the closing plate inside the connecting channel 32 opens under the control of the solenoid valve, ensuring that the larger, unqualified stone powder particles can smoothly pass through the connecting channel 32 and enter the location of the spiral feed section 33. Then, the spiral feed section 33 rotates until the unqualified large stone powder is conveyed to the inside of the return channel 34. At this point, the second air pump 37 starts and blows the unqualified large stone powder towards the feed inlet at the top of the casing 1, thereby achieving effective conveying of the larger, unqualified stone powder particles.

[0033] See Figure 1 The secondary grinding mechanism 3 also includes a guide portion 38, a return spring 39, and a vibration motor 391. The guide portion 38 has multiple parts and is respectively disposed inside the housing 1, and the multiple guide portions 38 are used to limit the sliding of the filter screen 31. The return spring 39 has multiple parts and is respectively sleeved on the outside of the guide portion 38, and the two ends of the multiple return spring 39 are respectively fixedly connected to the guide portion 38 and the filter screen 31. The vibration motor 391 has a pair and is respectively disposed inside the housing 1, and the pair of vibration motors 391 are both located below the filter screen 31.

[0034] Specifically, when the ground stone powder falls above the filter screen 31, the vibration motor 391 starts, causing the filter screen 31 to slide back and forth along the guide part 38, thereby achieving the screening of qualified ground stone powder.

[0035] See Figure 1 The secondary grinding mechanism 3 also includes a flexible plate 392; there are multiple flexible plates 392 respectively disposed inside the housing 1, and the multiple flexible plates 392 are all located above the filter screen 31.

[0036] Specifically, the flexible plate 392 is used to limit the upward sliding distance of the filter screen 31. When the filter screen 31 stops sliding and comes into contact with the flexible plate 392, the top horizontal surface of the filter screen 31 coincides with the bottom horizontal surface of the air inlet channel 35 and the bottom horizontal surface of the connecting channel 32, respectively, to ensure that the first air pump 36 can stably blow the unqualified stone powder to the connecting channel 32 and the spiral feeding part 33 when the unqualified stone powder is subjected to secondary grinding.

[0037] See Figure 1 The transmission crushing mechanism 4 includes a first synchronous pulley 41, a second synchronous pulley 42, a synchronous belt 43, and a crushing part 44. The first synchronous belt 43 is disposed on the outside of the grinding roller 2 and is fixedly connected to the grinding roller 2. The second synchronous pulley 42 is disposed on the side of the housing 1 and is located above the first synchronous pulley 41. The synchronous belt 43 is disposed on the side of the housing 1 and is connected to the first synchronous pulley 41 and the second synchronous pulley 42 respectively. The crushing part 44 is rotatably disposed on the top of the housing 1 and is located above the feed inlet.

[0038] Specifically, a contact wheel for abutting the synchronous belt 43 is provided on the side of the casing 1. A hydraulic cylinder is also provided on the side of the casing 1 to drive the contact wheel to slide closer to or further away from the synchronous belt 43. When the hydraulic cylinder is activated, it drives the contact wheel to slide, achieving the contact action with the synchronous belt 43, facilitating maintenance and replacement of the synchronous belt 43. When the grinding roller 2 rotates, it drives the second synchronous roller 42 to rotate through the first synchronous roller 41 and the synchronous belt 43. The crushing section 44 can perform preliminary crushing of the stone powder entering the feed inlet.

[0039] See Figure 1 The transmission crushing mechanism 4 also includes a rotating rod 45 and a contact part 46; the rotating rod 45 is rotatably disposed on the top of the housing 1 and is fixedly connected to the second synchronous wheel 42; the contact part 46 has a pair and is disposed on the outside of the rotating rod 45 respectively, and when the rotating rod 45 rotates, it can drive the contact part 46 to intermittently contact the crushing part 44.

[0040] Specifically, when the second synchronous wheel 42 rotates, it can drive the rotating rod 45 and the contact part 46 to rotate synchronously. When the contact part 46 rotates, it can intermittently contact the crushing part 44, thereby causing the crushing part 44 to reciprocate in a rotating and oscillating state. This realizes the action of driving the crushing part 44 to crush stone powder, solving the problem of the traditional separate setting of grinding device and crushing device, and making the crushing device and grinding device integrated.

[0041] See Figure 1The transmission crushing mechanism 4 also includes a limiting part 47; the limiting part 47 is disposed on the top of the housing 1 and is located on the side of the crushing part 44, and the limiting part 47 is used to limit the rotation range of the crushing part 44.

[0042] Specifically, when the contact part 46 contacts the crushing part 44, the crushing part 44 rotates. When the contact part 46 does not contact the crushing part 44, the crushing part 44 stops rotating when it contacts the limiting part 47, thereby enabling the crushing part 44 to reciprocate in a rotating and oscillating state.

[0043] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A grinding device for producing desulfurized stone powder, comprising a housing (1), a feed inlet opened at the top of the housing (1), and a pair of opposing rotating grinding rollers (2) disposed inside the housing (1) for grinding the stone powder, characterized in that: The grinding device also includes a secondary grinding mechanism (3) and a transmission crushing mechanism (4); The secondary grinding mechanism (3) is located on the side of the housing (1). The secondary grinding mechanism (3) includes a filter screen (31), a connecting channel (32), a spiral feeding part (33), and a return channel (34). The filter screen (31) is slidably disposed at the bottom of the housing (1) and is located below the grinding roller (2). The filter screen (31) is used to receive the stone powder after grinding. The connecting channel (32) is located on the side of the housing (1). The side of the housing (1) has an opening located on the side above the filter screen (31), and the opening is connected to the connecting channel (32). The spiral feeding part (33) is located on the side of the casing (1). The spiral feeding part (33) is used to assist in crushing and lifting the unqualified products after the initial grinding. The return channel (34) is located at the top of the spiral feeding section (33), and the return channel (34) is connected to the feed inlet; The transmission crushing mechanism (4) is located on the top of the casing (1). The transmission crushing mechanism (4) is used to perform preliminary crushing of the stone powder fed into the feed inlet.

2. The grinding device for desulfurized stone powder production according to claim 1, characterized in that: The secondary grinding mechanism (3) also includes an air intake channel (35), a first air pump (36), and a second air pump (37); the air intake channel (35) is located on the side of the housing (1), and a cuboid opening is provided on the side of the housing (1) above the filter screen (31) and communicating with the air intake channel (35); the first air pump (36) is located on the side of the housing (1), and the first air pump (36) is connected to the air intake channel (35), and the first air pump (36) is used to blow air through the air intake channel (35) to the top of the filter screen (31); the second air pump (37) is located on the side of the return channel (34).

3. The grinding device for desulfurized stone powder production according to claim 1, characterized in that: The secondary grinding mechanism (3) also includes a guide (38), a return spring (39), and a vibration motor (391); the guide (38) has multiple parts and is respectively disposed inside the housing (1), and the multiple guides (38) are used to restrict the sliding of the filter screen (31); the return spring (39) has multiple parts and is respectively sleeved on the outside of the guide (38), and the two ends of the multiple return springs (39) are respectively fixedly connected to the guide (38) and the filter screen (31); the vibration motor (391) has a pair and is respectively disposed inside the housing (1), and the pair of vibration motors (391) are both located below the filter screen (31).

4. A grinding device for producing desulfurized stone powder according to any one of claims 1-3, characterized in that: The secondary grinding mechanism (3) also includes a flexible plate (392); there are multiple flexible plates (392) respectively disposed inside the housing (1), and the multiple flexible plates (392) are all located above the filter screen (31).

5. A grinding device for producing desulfurized stone powder according to claim 1, characterized in that: The transmission crushing mechanism (4) includes a first synchronous pulley (41), a second synchronous pulley (42), a synchronous belt (43), and a crushing part (44); the first synchronous belt (43) is located on the outside of the grinding roller (2), and the first synchronous belt (43) is fixedly connected to the grinding roller (2); the second synchronous pulley (42) is located on the side of the housing (1), and the second synchronous pulley (42) is located above the first synchronous pulley (41); the synchronous belt (43) is located on the side of the housing (1), and the synchronous belt (43) is connected to the first synchronous pulley (41) and the second synchronous pulley (42) respectively; the crushing part (44) is rotatably located on the top of the housing (1), and the crushing part (44) is located above the feed inlet.

6. A grinding device for producing desulfurized stone powder according to claim 5, characterized in that: The transmission crushing mechanism (4) also includes a rotating rod (45) and a contact part (46); the rotating rod (45) is rotatably disposed on the top of the housing (1), and the rotating rod (45) is fixedly connected to the second synchronous wheel (42); The contact portion (46) has a pair and is respectively disposed on the outside of the rotating rod (45). When the rotating rod (45) rotates, it can drive the contact portion (46) to intermittently contact the breaking portion (44).

7. A grinding device for producing desulfurized stone powder according to claim 5, characterized in that: The transmission crushing mechanism (4) also includes a limiting part (47); the limiting part (47) is provided on the top of the housing (1) and is located on the side of the crushing part (44), and the limiting part (47) is used to limit the rotation range of the crushing part (44).

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