Crusher screen damage detection device and method and crushing equipment

Abstract

The invention relates to the technical field of material crushing, and discloses a crusher screen damage detection device and method and crushing equipment. The crusher screen damage detection device comprises a sampling pipe and an interceptor, the sampling pipe is used for collecting crushed materials discharged from a crusher, the interceptor comprises a shell, a material inlet, a material outlet and an interception assembly, the material inlet and the material outlet are formed in the shell, and the interception assembly is arranged in the shell. The interception assembly is arranged to be capable of intercepting crushed materials with the size larger than the hole diameter of a crusher screen, the material outlet is communicated with the material inlet through a communicating pipe, a differential pressure gauge is arranged on the communicating pipe, and the sampling pipe is communicated with the communicating pipe at the position close to the material inlet. According to the scheme, crushed materials discharged from the crusher can be introduced into the interceptor through the sampling pipe, and the differential pressure gauge is used for detecting the pressure difference change between the material inlet and the material outlet of the interceptor so as to detect whether the crusher screen is damaged or not, so that the crusher screen can be replaced in time, and normal production is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of material pulverization, and in particular to a pulverizer screen damage detection device, a pulverizer screen damage detection method and pulverizing equipment comprising the pulverizer screen damage detection device. Background Art

[0002] In the process of corn fermentation to make fuel ethanol, it is usually necessary to crush and screen the corn kernels. The specific process is: first, the corn kernels (about 10mm in diameter) enter the grinder. After being hit by the hammer of the grinder, corn flour with different particle sizes is formed. The large-particle corn flour cannot pass through the screen and will continue to contact and hit with the hammer until it becomes small-particle corn flour (about 2mm in diameter). The small-particle corn flour passes through the screen with a certain aperture and enters the next stage.

[0003] However, in the process of crushing corn kernels, since the corn kernels often contain unremoved iron debris that enters the grinder, the screen will be damaged, which will lead to the failure of the screening process. If it cannot be discovered in time, large-grain corn flour or corn kernels will pass through the damaged screen and enter the subsequent process stages, seriously affecting the processing effect and stability of the subsequent process. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem in the prior art that the broken screen in the grinder cannot be discovered in time, resulting in large particles of corn flour or corn kernels entering subsequent work sections and affecting subsequent processes.

[0005] In order to achieve the above-mentioned object, the first aspect of the present invention provides a crusher screen damage detection device, comprising:

[0006] a sampling tube for collecting pulverized material discharged from the pulverizer; and

[0007] The interceptor comprises a shell, a material inlet and a material outlet opened on the shell, and an interception component arranged in the shell, the interception component is configured to intercept crushed material with a size larger than the aperture of the crusher screen, the material outlet is connected to the material inlet through a connecting pipe, a differential pressure gauge is arranged on the connecting pipe, and the sampling tube is connected to the connecting pipe at a position close to the material inlet.

[0008] The crusher screen damage detection device of the present invention can pass the crushed material discharged from the crusher into the interceptor through the sampling tube through the above scheme. When the crusher screen is not damaged, the crushed material entering the interceptor will all pass through the interception component and be discharged from the material outlet. The pressure difference between the material inlet and the material outlet of the interceptor changes little. The staff can obtain the pressure difference change through the differential pressure gauge, and then know that the crusher screen is not damaged; when the crusher screen is damaged, large-particle material will be mixed in the crushed material. When it enters the interceptor, the large-particle material cannot pass through the interception component and will be blocked in the interception component, thereby increasing the pressure difference between the material inlet and the material outlet of the interceptor. The staff can obtain the pressure difference change through the differential pressure gauge, and then know that the crusher screen is damaged, so as to replace the crusher screen in time.

[0009] Optionally, the detection device further comprises a positive pressure fan or a negative pressure fan for allowing the crushed material discharged from the crusher to enter the sampling tube.

[0010] Optionally, one end of the sampling tube is used to connect with the crushing material conveying pipeline of the crushing equipment, and the other end of the sampling tube is connected with the connecting pipe. The negative pressure fan is connected with the connecting pipe and is used to provide negative pressure to the connecting pipe so that part of the crushing material in the crushing material conveying pipeline enters the shell through the sampling tube and the connecting pipe.

[0011] Optionally, the detection device further comprises a cyclone separator having a material inlet, a gas outlet and a solid outlet, the material inlet of the cyclone separator being connected to the connecting pipe, and the gas outlet of the cyclone separator being connected to the negative pressure fan.

[0012] Optionally, the retention assembly includes an upper sieve plate and a lower sieve plate spaced apart from each other, the upper sieve plate is provided with a first sieve hole, the lower sieve plate is provided with a second sieve hole, the retention assembly also includes a retention tube connected between the first sieve hole and the second sieve hole, the aperture of the first sieve hole is larger than the aperture of the second sieve hole, the aperture of the second sieve hole is set to match the aperture of the grinder screen, and the diameter of the retention tube is set to gradually decrease from the aperture of the first sieve hole to the aperture of the second sieve hole.

[0013] Optionally, a plurality of the first sieve holes are evenly distributed on the upper sieve plate, a plurality of the second sieve holes are evenly distributed on the lower sieve plate, and the plurality of the first sieve holes and the plurality of the second sieve holes are arranged one by one in an upper and lower correspondence.

[0014] Optionally, the interception assembly is detachably mounted in the shell, a mounting opening is provided on the side wall of the shell for the interception assembly to enter and exit the shell, and the interceptor includes a movable door sealed at the mounting opening, and the movable door can open and close the mounting opening.

[0015] Optionally, the detection device further includes a control unit and an alarm, wherein the control unit is electrically connected to the differential pressure gauge and the alarm respectively, and the control unit is configured to control the operation of the alarm according to data from the differential pressure gauge.

[0016] A second aspect of the present invention provides a pulverizing device, comprising:

[0017] A pulverizer, the pulverizer having a raw material inlet and a pulverized material outlet;

[0018] a crushed material conveying pipeline, one end of which is connected to the crushed material outlet; and

[0019] In the above-mentioned pulverizer screen damage detection device, the sampling tube is connected to the pulverized material outlet or the pulverized material conveying pipeline.

[0020] The pulverizing equipment of the present invention is provided with a pulverizer screen damage detection device, and the pulverized material discharged from the pulverizer is passed into the interceptor through a sampling tube. The pressure difference change between the material inlet and the material outlet of the interceptor is detected by a differential pressure gauge to detect whether the pulverizer screen is damaged, so as to facilitate timely replacement of the pulverizer screen and ensure normal production.

[0021] Optionally, the pulverizing equipment further comprises a pulverized material conveying device, which is disposed between the pulverizer and the pulverized material conveying pipeline and is used for conveying the pulverized material discharged from the pulverized material outlet to the pulverized material conveying pipeline.

[0022] A third aspect of the present invention provides a method for detecting a damaged grinder screen, the method comprising: partially collecting the material crushed by the grinder into an interceptor, and determining whether the grinder screen is damaged by detecting whether the interceptor is blocked, wherein the interceptor is configured to intercept crushed material having a size larger than the aperture of the grinder screen.

[0023] The method for detecting the damage of the pulverizer screen of the present invention can facilitate the staff to know whether the pulverizer screen is damaged in time through the above scheme, so as to replace the pulverizer screen in time and ensure the normal production.

[0024] Optionally, the method detects whether the interceptor is blocked by detecting a change in the pressure difference between a material inlet and a material outlet of the interceptor.

[0025] Optionally, the method is carried out using the pulverizer screen damage detection device or pulverizing equipment described above.

[0026] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the pulverizing device in the present invention;

[0029] Figure 2 It is a structural schematic diagram of an embodiment of the interceptor in the present invention;

[0030] Figure 3 yes Figure 2 AA section view of the middle interceptor;

[0031] Figure 4 yes Figure 2 BB cross-sectional view of the middle interceptor.

[0032] Description of Reference Numerals

[0033] 1-crusher, 2-crushed material conveying device, 3-crushed material conveying pipeline, 4-sampling tube, 5-interceptor, 51-shell, 52-upper sieve plate, 53-lower sieve plate, 54-interceptor tube, 55-movable door, 6-connecting tube, 7-differential pressure gauge, 8-cyclone separator, 9-negative pressure fan. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

[0035] The present invention provides these embodiments to make the present invention thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0036] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0037] In addition, the words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly perpendicular, but is within the tolerance range. "Parallel" is not strictly parallel, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0038] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0039] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] A first aspect of the present invention provides a pulverizer screen damage detection device, comprising:

[0042] A sampling tube 4, which is used to collect the crushed material discharged from the crusher 1; and

[0043] The interceptor 5 includes a housing 51, a material inlet and a material outlet formed on the housing 51, and an interception assembly disposed inside the housing 51. The interception assembly is configured to intercept the crushed materials with sizes larger than the aperture of the crusher screen. The material outlet of the interceptor 5 is communicated with the material inlet through a connecting pipe 6. A differential pressure gauge 7 is provided on the connecting pipe 6. The sampling pipe 4 is communicated with the connecting pipe 6 at a position close to the material inlet of the housing 51.

[0044] In the above, it should be noted that the purpose of the sampling pipe 4 being communicated with the connecting pipe 6 at a position close to the material inlet of the housing 51 is to enable the crushed materials in the sampling pipe 4 to enter the housing 51 from the material inlet through the connecting pipe 6. After the crushed materials enter the housing 51 through the material inlet of the housing 51, they must pass through the interception assembly and then be discharged from the material outlet. The function of the interception assembly is to throttle the crushed materials and form a pressure difference before and after throttling. The interception assembly is configured to intercept the crushed materials with sizes larger than the aperture of the crusher screen, which means that the crushed materials with sizes smaller than the aperture of the crusher screen can pass through the interception assembly smoothly, while the crushed materials with sizes larger than the aperture of the crusher screen will remain in the interception assembly.

[0045] Through the above solution, the crusher screen breakage detection device of the present invention can pass the crushed materials discharged from the crusher 1 into the interceptor 5 through the sampling pipe 4. When the crusher screen is intact, all the crushed materials entering the interceptor 5 will pass through the interception assembly and be discharged from the material outlet. The pressure difference change between the material inlet and the material outlet of the interceptor 5 is small. The staff can know the pressure difference change through the differential pressure gauge 7, and then know that the crusher screen is intact. When the crusher screen is damaged, large-particle-size materials will be mixed into the crushed materials. When they enter the interceptor 5, the large-particle-size materials cannot pass through the interception assembly and will be blocked in the interception assembly, resulting in an increase in the pressure difference between the material inlet and the material outlet of the interceptor 5. The staff can know the pressure difference change through the differential pressure gauge 7, and then know that the crusher screen is damaged, so as to replace the crusher screen in time.

[0046] In the present invention, the sampling of the crushed materials by the sampling pipe 4 and the conveying to the interceptor 5 can be achieved by creating a height difference and using the gravity of the materials, or can be achieved with the help of power equipment. For example, in some embodiments, the detection device further includes a positive pressure blower or a negative pressure blower 9 for enabling the crushed materials discharged from the crusher 1 to enter the sampling pipe 4. It can be understood that since the sampling pipe 4 is communicated with the connecting pipe 6, the positive pressure blower or the negative pressure blower 9 can also make the crushed materials continue to flow into the connecting pipe 6. The positive pressure blower (such as a blower) can be disposed upstream of the sampling pipe 4 to blow the crushed materials into the sampling pipe 4; the negative pressure blower 9 (such as an induced draft fan) can be disposed downstream of the sampling pipe 4 to suck the crushed materials into the sampling pipe 4. The upstream and downstream mentioned here refer to the flow direction of the crushed materials (see Figure 1In the direction indicated by the arrow).

[0047] like Figure 1 In the embodiment shown, one end of the sampling tube 4 is used to connect with the crushed material conveying pipeline 3 of the crushing equipment, and the other end of the sampling tube 4 is connected with the connecting pipe 6. The negative pressure fan 9 is connected with the connecting pipe 6 to provide negative pressure to the connecting pipe 6 so that part of the crushed material in the crushed material conveying pipeline 3 enters the shell 51 through the sampling tube 4 and the connecting pipe 6.

[0048] Furthermore, the detection device may further include a cyclone separator 8, which is used to separate solids (i.e., crushed materials) and gases, and the cyclone separator 8 has a material inlet (see Figure 1 The upper left part of the cyclone separator 8), the gas outlet (see Figure 1 The top of the cyclone separator 8) and the solids outlet (see Figure 1 The bottom of the cyclone separator 8 is connected to the material inlet of the cyclone separator 8 and the connecting pipe 6, and the gas outlet of the cyclone separator 8 is connected to the negative pressure fan 9.

[0049] The minimum power requirement of the negative pressure fan 9 is to form a negative pressure capable of sucking in materials, and the maximum power requirement is not higher than the maximum conveying capacity of the air shutoff device (the air shutoff device is located at the solid outlet of the cyclone separator) in the cyclone separator 8. For example, the power of the negative pressure fan 9 can be above 0.5KW.

[0050] In the present invention, the interception component can have various embodiments. Figure 2 In the embodiment shown, the interception assembly includes an upper sieve plate 52 and a lower sieve plate 53 which are spaced apart from each other. The upper sieve plate 52 is provided with a first sieve hole, and the lower sieve plate 53 is provided with a second sieve hole. The interception assembly also includes an interception tube 54 connected between the first sieve hole and the second sieve hole. The aperture of the first sieve hole is larger than the aperture of the second sieve hole, and the aperture of the second sieve hole is set to match the aperture of the pulverizer screen. The diameter of the interception tube 54 is set to gradually decrease from the aperture of the first sieve hole to the aperture of the second sieve hole. For example, the aperture of the first sieve hole can be 15.0 mm, and the aperture of the second sieve hole can be 2.1 mm. It can be understood that the outer diameters of the upper sieve plate 52 and the lower sieve plate 53 are adapted to the inner diameter of the housing 51, the material inlet is located above the upper sieve plate 52, and the material outlet is located below the lower sieve plate 53. The first sieve hole, the intercepting tube 54 and the second sieve hole together form a channel for the crushed material to pass through. When the particle size of the crushed material is larger than the aperture of the second sieve hole, the crushed material cannot leave the channel through the second sieve hole, so it will remain in the channel and block the channel, causing a change in the pressure difference between the material inlet and the material outlet.

[0051] The upper sieve plate 52 may be evenly provided with a plurality of first sieve holes, and the lower sieve plate 53 may be evenly provided with a plurality of second sieve holes, and the plurality of first sieve holes and the plurality of second sieve holes are arranged one by one in an upper and lower correspondence. It can be understood that a retention tube 54 is connected between each pair of first sieve holes and second sieve holes.

[0052] Of course, in other embodiments, the interception assembly may also include a column whose outer diameter matches the inner diameter of the housing 51, and the column may be provided with a plurality of axial through holes (the axial through holes are the above-mentioned channels), the aperture of the upper port of the axial through hole is larger, and the aperture of the lower port of the axial through hole is smaller, and matches the aperture of the pulverizer screen. The cross-sectional shape of the column matches the inner cavity of the housing 51, and may be, for example, circular, square, etc.

[0053] To facilitate maintenance of the interception components, see Figure 2-Figure 4 The interception assembly is detachably mounted in the housing 51. The side wall of the housing 51 is provided with an installation opening for the interception assembly to enter and exit the housing 51. The interceptor 5 includes a movable door 55 sealed at the installation opening, and the movable door 55 can open and close the installation opening. Since the structure of the movable door 55 and its movable installation method are prior art, the improvement of the present invention is not in this regard, and therefore, it will not be described in detail.

[0054] In the present invention, the detection device may further include a control unit and an alarm, the control unit is electrically connected to the differential pressure gauge 7 and the alarm respectively, and the control unit is configured to control the operation of the alarm according to the data of the differential pressure gauge 7. Specifically, when the differential pressure measured by the differential pressure gauge 7 becomes larger, the control unit may control the alarm to sound an alarm, and notify the staff that the pulverizer screen is damaged, so that they can replace it in time to ensure the normal production.

[0055] A second aspect of the present invention provides a pulverizing device, comprising:

[0056] A pulverizer 1, wherein the pulverizer 1 has a raw material inlet and a pulverized material outlet;

[0057] a crushed material conveying pipeline 3, one end of which is connected to the crushed material outlet; and

[0058] A crusher screen damage detection device, wherein the sampling tube 4 is connected to the crushed material outlet or the crushed material conveying pipeline 3.

[0059] The pulverizing equipment of the present invention is provided with a pulverizer screen damage detection device, and the pulverized material discharged from the pulverizer 1 is passed into the interceptor 5 through the sampling tube 4. The pressure difference change between the material inlet and the material outlet of the interceptor 5 is detected by the differential pressure gauge 7 to detect whether the pulverizer screen is damaged, so as to facilitate timely replacement of the pulverizer screen and ensure normal production.

[0060] like Figure 1As shown, the pulverizing equipment may further include a pulverized material conveying device 2 , which is disposed between the pulverizer 1 and the pulverized material conveying pipeline 3 , and is used to convey the pulverized material discharged from the pulverized material outlet to the pulverized material conveying pipeline 3 .

[0061] It should be noted that the crushed material conveying device 2 can adopt any appropriate conveying equipment in the prior art, such as a screw conveyor, a belt conveyor, etc.

[0062] The control unit in the pulverizer screen damage detection device can also be configured to be electrically connected to the pulverizer 1, and control the operation of the pulverizer 1 according to the data of the differential pressure gauge. When the differential pressure gauge detects that the pressure difference becomes larger, the control device can control the pulverizer 1 to stop in time.

[0063] See also Figure 1 When in use, corn kernels are added to the pulverizer 1 for pulverization, and the pulverized corn powder is conveyed to the pulverized material conveying device 2 through the pulverized material outlet, and then conveyed to the pulverized material conveying pipeline 3 through the pulverized material conveying device 2 to be conveyed to other sections. Among them, due to the presence of the negative pressure fan 9, part of the corn powder in the pulverized material conveying pipeline 3 will be sucked into the sampling tube 4, and then enter the interior of the interceptor 5. The corn powder enters the connecting pipe 6 through the interception component and the material outlet respectively, and is separated out through the cyclone separator 8. When the screen in the pulverizer 1 is damaged, large particles will appear in the pulverized material conveying pipeline 3, and the large particles will be sucked into the sampling tube 4 and enter the interceptor 5. Since the inner diameter of the interception tube 54 in the interceptor 5 is large at the top and small at the bottom, the large particles are blocked therein, resulting in a large pressure difference at both ends of the interceptor 5. At this time, it indicates that the screen is damaged, and the staff is prompted to replace the screen in time. At the same time, the movable door 55 of the interceptor 5 can be opened, the interception component can be taken out, the large particles blocked therein can be processed, and then it can be put into the shell for continued use.

[0064] A third aspect of the present invention provides a method for detecting a damaged grinder screen, the method comprising: partially collecting the material crushed by the grinder into an interceptor, and determining whether the grinder screen is damaged by detecting whether the interceptor is blocked, wherein the interceptor is configured to intercept crushed material having a size larger than the aperture of the grinder screen.

[0065] The method for detecting the damage of the pulverizer screen of the present invention can facilitate the staff to know whether the pulverizer screen is damaged in time through the above scheme, so as to replace the pulverizer screen in time and ensure the normal production.

[0066] In the above, the interceptor can be detected to be blocked by detecting the pressure difference change between the material inlet and the material outlet of the interceptor. Of course, other methods of determining whether the crusher screen is damaged by detecting whether the interceptor is blocked are also within the protection scope of the present invention.

[0067] The above method can be carried out using the crusher screen damage detection device or crushing equipment of the present invention.

[0068] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0069] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A crusher screen damage detection device, It is characterized in that include: A sampling tube (4), wherein the sampling tube (4) is used to collect the pulverized material discharged from the pulverizer (1); and The interceptor (5) comprises a shell (51), a material inlet and a material outlet provided on the shell (51), and an interception component arranged in the shell (51), the interception component being arranged to intercept pulverized material having a size larger than the aperture of a pulverizer screen, the material outlet being connected to the material inlet via a connecting pipe (6), a differential pressure gauge (7) being provided on the connecting pipe (6), and the sampling pipe (4) being connected to the connecting pipe (6) at a position close to the material inlet.

2. The crusher screen damage detection device according to claim 1, It is characterized in that The detection device further comprises a positive pressure fan or a negative pressure fan (9) for allowing the pulverized material discharged from the pulverizer (1) to enter the sampling tube (4). Preferably, one end of the sampling tube (4) is used to communicate with the crushed material conveying pipeline (3) of the crushing equipment, and the other end of the sampling tube (4) is connected to the connecting pipe (6). The negative pressure fan (9) is connected to the connecting pipe (6) and is used to provide negative pressure to the connecting pipe (6) so that part of the crushed material in the crushed material conveying pipeline (3) enters the shell (51) through the sampling tube (4) and the connecting pipe (6).

3. The crusher screen damage detection device according to claim 2, It is characterized in that The detection device further comprises a cyclone separator (8), wherein the cyclone separator (8) has a material inlet, a gas outlet and a solid outlet, the material inlet of the cyclone separator (8) being connected to the connecting pipe (6), and the gas outlet of the cyclone separator (8) being connected to the negative pressure fan (9).

4. The crusher screen damage detection device according to claim 1, It is characterized in that The interception assembly comprises an upper sieve plate (52) and a lower sieve plate (53) which are spaced apart from each other, the upper sieve plate (52) is provided with a first sieve hole, the lower sieve plate (53) is provided with a second sieve hole, the interception assembly further comprises an interception tube (54) connected between the first sieve hole and the second sieve hole, the aperture of the first sieve hole is larger than the aperture of the second sieve hole, the aperture of the second sieve hole is set to match the aperture of the pulverizer screen, and the diameter of the interception tube (54) is set to gradually decrease from the aperture of the first sieve hole to the aperture of the second sieve hole.

5. The crusher screen damage detection device according to claim 4, It is characterized in that The upper sieve plate (52) is evenly distributed with a plurality of the first sieve holes, and the lower sieve plate (53) is evenly distributed with a plurality of the second sieve holes, and the plurality of the first sieve holes and the plurality of the second sieve holes are arranged one by one in an upper and lower direction.

6. The crusher screen damage detection device according to any one of claims 1 to 5, It is characterized in that The interception assembly is detachably mounted in the housing (51); a mounting opening is provided on a side wall of the housing (51) for the interception assembly to enter and exit the housing (51); the interceptor (5) comprises a movable door (55) sealingly arranged at the mounting opening; the movable door (55) is capable of opening and closing the mounting opening; and / or The detection device further comprises a control unit and an alarm, wherein the control unit is electrically connected to the differential pressure gauge (7) and the alarm respectively, and the control unit is configured to control the operation of the alarm according to data from the differential pressure gauge (7).

7. A crushing device, It is characterized in that include: A pulverizer (1), the pulverizer (1) having a raw material inlet and a pulverized material outlet; A crushed material conveying pipeline (3), one end of which is in communication with the crushed material outlet; as well as The pulverizer screen damage detection device according to any one of claims 1 to 6, wherein the sampling tube (4) is connected to the pulverized material outlet or the pulverized material conveying pipeline (3).

8. The pulverizing device according to claim 7, It is characterized in that The pulverizing equipment further comprises a pulverized material conveying device (2), wherein the pulverized material conveying device (2) is arranged between the pulverizer (1) and the pulverized material conveying pipeline (3), and is used for conveying the pulverized material discharged from the pulverized material outlet to the pulverized material conveying pipeline (3).

9. A method for detecting damage to a crusher screen. It is characterized in that The method comprises: partially collecting the material crushed by the pulverizer into an interceptor, and determining whether the screen of the pulverizer is damaged by detecting whether the interceptor is blocked, wherein the interceptor is configured to intercept the pulverized material with a size larger than the aperture of the pulverizer screen.

10. The method for detecting a pulverizer screen damage according to claim 9, It is characterized in that The method detects whether the interceptor is blocked by detecting a change in the pressure difference between the material inlet and the material outlet of the interceptor; and / or The method is carried out using the crusher screen damage detection device described in any one of claims 1 to 6 or the crushing equipment described in claim 7 or 8.

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