Adjustable hammerhead structure for superfine sand making machine

Abstract

The utility model relates to the technical field of crushing equipment, in particular to an adjustable hammer head structure for a superfine sand making machine. The utility model provides an adjustable hammerhead structure. The adjustable hammerhead structure comprises a hammerhead assembly and an adjusting assembly, the adjusting assembly and the hammer head assembly are connected in a sleeving mode, after the hammer head structure is abraded and when the gap between the hammer head structure and the lining plate is increased, the hammer head structure extends in the direction of the lining plate by adjusting the adjusting assembly, so that the length of the hammer head structure is increased, and then the gap between the hammer head structure and the lining plate is kept within the preset range. The gap between the hammerhead structure and the lining plate is kept in a preset range by adjusting the adjusting assembly, so that the working efficiency of preparing fine sand is ensured; and meanwhile, compared with the mode that the gap between the hammer head structure and the lining plate is adjusted by replacing the hammer head structure, material saving can be effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of crushing equipment, in particular to an adjustable hammer head structure for an ultra-fine sand making machine. Background Art

[0002] Mining crushers are mainly used to crush various types of stone materials. According to different crushing principles and product particle sizes, there are many types of crushers. Crusher is a crushing machine that uses the high-speed impact of the hammer structure to perform medium and fine crushing of materials. The hammer structure is severely worn during crushing. The wear of the hammer structure causes the gap between the hammer structure and the crusher liner to become larger, thereby reducing the crushing efficiency of the crusher in preparing fine sand.

[0003] How to solve the above technical problems is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] In order to solve the problems and shortcomings existing in the prior art, the utility model provides an adjustable hammer structure for an ultra-fine sand making machine. By setting an adjusting piece, when one end of the hammer structure close to the liner of the crusher is worn, the hammer structure can be extended toward the liner by adjusting the adjusting piece, thereby ensuring that the gap between the hammer structure and the liner of the crusher is always controlled within a preset range, thereby ensuring the crushing efficiency of the crusher when preparing fine sand.

[0005] Specifically, the utility model provides an adjustable hammer head structure for an ultra-fine sand making machine, the hammer head structure comprising:

[0006] Hammer head assembly;

[0007] An adjusting component is connected to the hammer assembly through a sleeve, and the sleeve length of the hammer assembly and the adjusting component is adjusted to adjust the length of the hammer structure, so that the gap between the hammer structure and the liner of the crusher is within a preset range.

[0008] Optionally, the adjustment component includes:

[0009] An adjusting member, wherein a peripheral wall of the adjusting member is provided with a first through hole;

[0010] An adjusting plate, wherein the adjusting plate is matched with the first through hole, and the adjusting plate passes through the first through hole to adjust the length of the hammer head structure.

[0011] Optionally, the hammer assembly includes a hammer and a fixing member;

[0012] One end of the fixing member is sleeve-connected to the adjusting member, and the other end of the fixing member is detachably connected to the hammer head.

[0013] Optionally, a first protrusion is provided at one end of the hammer head connected to the fixing member;

[0014] The fixing member is provided with a first groove body corresponding to the first protrusion body.

[0015] Optionally, the hammer head and the fixing member are connected by bolts.

[0016] Optionally, the hammer head structure further includes two side guard plates, and the two side guard plates are correspondingly arranged on both sides of the fixing member.

[0017] Optionally, a second protrusion is provided on the fixing member, a second groove is provided on the edge guard plate, and the second protrusion and the second groove are provided correspondingly.

[0018] Optionally, the end of the hammer head close to the lining plate is arc-shaped.

[0019] In the hammer structure of the utility model, the length of the hammer structure is adjusted by setting an adjustment component on the hammer structure. When the gap between the hammer structure and the liner increases after the hammer structure is worn, the hammer structure is extended toward the liner by adjusting the adjustment component, so that the length of the hammer structure is extended, and the gap between the hammer structure and the liner is kept within a preset range. By adjusting the adjustment component to keep the gap between the hammer structure and the liner within a preset range, the work efficiency of preparing fine sand is guaranteed; at the same time, compared with replacing the hammer structure to adjust the gap between the hammer structure and the liner, it can effectively save materials.

[0020] Furthermore, in the utility model, the hammer head assembly is configured as a detachably connected hammer head and fixing part. When the hammer head structure is worn, only the hammer head needs to be replaced, and the fixing part does not need to be replaced, thereby reducing the material of the part that needs to be replaced, further reducing material loss, and achieving material savings.

[0021] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0023] Figure 1 This is a front view of a hammer head structure according to an embodiment of the utility model;

[0024] Figure 2 It is a structural diagram of a hammer head structure according to another embodiment of the utility model;

[0025] Figure 3 It is a front view of a hammer head structure according to another embodiment of the utility model;

[0026] Figure 4 is an AA cross-sectional view of a hammer head structure according to another embodiment of the utility model;

[0027] Figure 5 It is a left side view of a hammer head structure according to another embodiment of the utility model;

[0028] Figure 6 is a structural diagram of an adjusting member according to an embodiment of the utility model;

[0029] Figure 7 is a structural diagram of an adjusting member according to another embodiment of the utility model;

[0030] Figure 8 It is a structural diagram of an adjusting piece according to an embodiment of the utility model;

[0031] Fig. 9 is a structural diagram of a fixing member according to an embodiment of the utility model;

[0032] Fig.10 is a cross-sectional view of a fixing member according to an embodiment of the utility model;

[0033] Fig.11 is a front view of an edge guard plate according to an embodiment of the utility model;

[0034] Fig.12 It is a front view of a hammer head structure according to an embodiment of the utility model.

[0035] In the figure: 1-adjusting assembly, 2-hammer assembly, 10-adjusting member, 11-mounting hole, 12-limiting hole, 13-force hole, 14-guide rod, 15-first through hole, 20-adjusting plate, 21-first adjusting plate, 22-second adjusting plate, 23-installation hole, 24-gasket, 30-fixing member, 31-second through hole, 32-nut mounting hole, 33-second protrusion, 34-first groove, 35-guide groove, 36-second bolt mounting hole, 37-second screw mounting hole, 50-side guard plate, 51-second groove, 52-first screw mounting hole, 60-hammer, 61-first protrusion, 62-first bolt mounting hole. DETAILED DESCRIPTION

[0036] Refer to the following Figures 1 to 12To describe an adjustable hammer structure for an ultra-fine sand making machine of an embodiment of the utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0037] In the special mortar for construction (such as self-leveling mortar, thermal insulation mortar, gypsum mortar, etc.), sand casting, thermal insulation coils, refractory profiles, special glass, chemicals, toothpaste and many other items, a kind of ultra-fine sand with ultra-small particle diameter is used. The diameter is generally between 40 mesh and 140 mesh, that is, between 0.11 and 0.38 mm. This ultra-fine sand includes two types: lime (the main component is CaCO3) and silica (the main component is SiO2). This ultra-fine sand is mainly obtained by screening and separation from natural sand (mainly river sand). At present, for environmental protection considerations, it can only be selected and used after the ore is crushed by crushing equipment and screened and separated.

[0038] Commonly used ore crushing equipment for processing ultrafine sand includes jaw crusher, hammer crusher (including vertical and horizontal shaft), impact crusher, impact crusher, cone crusher, etc. In these equipment, a certain proportion of ultrafine sand products can be obtained after the ore is crushed, but the proportion of ultrafine sand products obtained by different crushers varies. In other words, the crushing efficiency of the above crushing equipment is high or low. Under the same output and the same energy consumption, the greater the proportion of ultrafine sand products, the higher the crushing efficiency; conversely, the lower the crushing efficiency. In actual production, the higher the crushing efficiency, the better. High crushing efficiency is conducive to saving costs and improving benefits. Relatively speaking, the vertical shaft hammer crusher has a higher crushing efficiency.

[0039] In a vertical shaft hammer crusher, there are usually multiple layers of combined hammers installed from top to bottom, and each layer of combined hammers is composed of multiple hammers that are evenly distributed, independent of each other, and have the same structure. Each hammer on each layer rotates at high speed driven by the same main shaft that is perpendicular to the ground. A circle of fixed lining plates is fixed on the periphery of each layer of hammers, and there is a certain working gap between the outermost edge of each hammer and this circle of lining plates to ensure that the working hammers of the crusher will not touch the lining plates when rotating. During operation, large particles to be crushed enter the equipment from the highest feed port, and under the action of gravity, they first fall into the crushing area of ​​the first layer, contact with multiple high-speed rotating hammers on this layer, and are crushed by the first combined hammer and gain a high speed, and then hit the lining plates around the first layer of combined hammers at high speed, generating a strong impact force to form the first impact crushing. Under the action of gravity, the crushed material falls into the crushing area of ​​the second layer, and continues to be crushed by the second high-speed rotating hammers on this layer and gain a high speed again, and then hits the lining plates around the second layer of combined hammers at high speed to generate a large impact force to form the second impact crushing. From top to bottom, the vertical shaft hammer crusher is equipped with several layers of hammer heads. The large particles of materials to be crushed will be hit and crushed several times during the falling process.

[0040] During the crushing process, when the diameter of the crushed particles is small enough, they may enter the gap between the hammer head and the liner. In this gap, the small particles rotate and tumble, making various irregular movements, repeatedly colliding and rubbing with the liner and the outer surface of the hammer head, so that the shape gradually becomes round and further broken into smaller particles.

[0041] After abrasive crushing, the sand diameter becomes smaller, the particle shape becomes rounder and smoother, and ultrafine sand is obtained after separation.

[0042] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] Figure 1 1 is a front view of a hammer head structure according to an embodiment of the utility model. Figure 1 As shown, combined with Figures 2 to 12The utility model provides an adjustable hammer structure for an ultra-fine sand making machine. The adjustable hammer structure includes a hammer assembly 2 and an adjustment assembly 1. The hammer assembly 2 cooperates with the liner of the crusher to impact the material, thereby crushing the material. The adjustment assembly 1 and the hammer assembly 2 are sleeved and connected. By adjusting the sleeve length of the hammer assembly 2 and the adjustment assembly 1, the length of the hammer structure can be adjusted, so that the gap between the hammer structure and the liner of the crusher is within a preset range.

[0044] Specifically, the gap between the hammer structure and the liner of the crusher is within a preset range. In the process of crushing the material, the part of the hammer structure close to the liner of the crusher is worn, especially the outer edge perpendicular to the length direction of the hammer structure is severely worn. Because of the wear of the hammer structure, the gap between the hammer structure and the liner of the crusher becomes larger. When the gap exceeds the upper limit of the preset range, the efficiency of obtaining ultrafine sand is significantly reduced. In order to prevent the efficiency of obtaining ultrafine sand from being significantly reduced, it is necessary to adjust the gap between the hammer structure and the liner of the crusher to a preset range. In this embodiment, the adjustment component 1 of the hammer structure is adjusted to move the hammer component 2 toward the liner, so that the gap between the hammer structure and the liner of the crusher is reduced, that is, by adjusting the adjustment component 1 of the hammer structure, the gap between the hammer structure and the liner of the crusher is returned to the preset range, thereby ensuring the preparation efficiency of ultrafine sand. The preset range is preferably 10 to 20 mm.

[0045] In this embodiment, by adjusting the adjusting component 1 of the hammer structure, the gap between the hammer structure and the liner of the crusher is within a preset range, thereby ensuring the production efficiency of ultra-fine sand. At the same time, the gap between the hammer structure and the liner of the crusher can be adjusted by adjusting the adjusting component 1 of the hammer structure without replacing the hammer structure, thereby ensuring the production efficiency of ultra-fine sand and achieving material savings.

[0046] In some embodiments of the present invention, the adjustment assembly 1 includes an adjustment member 10 and an adjustment sheet 20. The peripheral wall of the adjustment member 10 is provided with a first through hole 15, and the adjustment member 10 has a guide rod 14. The hammer assembly 2 has a second through hole 31 and a guide groove 35.

[0047] The adjusting piece 20 is matched with the first through hole 15 , and the adjusting piece 20 passes through the first through hole 15 to adjust the length of the hammer head structure.

[0048] Specifically, a first through hole 15 is provided on the peripheral wall of the adjusting member 10, and a second through hole 31 is provided on the hammer assembly 2. Under the guidance of the guide rod 14, the adjusting member 10 enters the guide groove 35 of the hammer assembly 2, so that part of the first through hole 15 and the second through hole 31 overlap, and part of the adjusting sheet 20 crosses the first through hole 15 and the second through hole 31. At this time, the direction of the adjusting sheet 20 is perpendicular to the axial direction of the adjusting member 10. When the hammer assembly 2 is worn, the number of adjusting sheets 20 that pass through the first through hole 15 and the second through hole 31 at the same time is reduced, so that the hammer assembly 2 can move toward the liner, thereby extending the hammer structure and reducing the gap. When the crusher is working, the hammer assembly 2 is subjected to centrifugal force, and a pressure perpendicular to the adjusting sheet 20 and directed to the liner is applied to the adjusting sheet 20, and the adjusting sheet 20 is squeezed to prevent it from falling off, so that the elongation of the hammer structure remains unchanged.

[0049] In this embodiment, the length of the hammer structure is adjusted by the adjusting piece 20, thereby adjusting the gap between the hammer structure and the liner of the crusher, which is easy to operate.

[0050] It should be noted that in other embodiments of the present invention, the adjusting member 10 has a guide groove, the hammer assembly 2 has a guide rod adapted to the guide groove, and the hammer assembly 2 is inserted into the adjusting member 10. In other words, there is no mandatory restriction on the internal and external relationship between the hammer assembly 2 and the adjusting member 10.

[0051] In a further embodiment of the present invention, the movement of the hammer assembly 2 toward the lining plate makes a portion of the first through hole 15 not overlap with the hammer assembly 2 .

[0052] Specifically, a first through hole 15 is provided on the peripheral wall of the adjusting member 10, and a second through hole 31 is correspondingly provided on the hammer assembly 2. Part of the adjusting sheet 20 crosses the first through hole 15 and the second through hole 31, and at this time, the direction of the adjusting sheet 20 is perpendicular to the axial direction of the adjusting member 10. When the hammer assembly 2 is worn, the number of adjusting sheets 20 that pass through the first through hole 15 and the second through hole 31 at the same time is reduced, so that the hammer assembly 2 can move toward the lining plate, thereby extending the hammer structure and reducing the gap. At this time, part of the first through hole 15 does not overlap with the hammer assembly 2, so that the adjusting sheet 20 passes through this part of the first through hole 15 and cooperates with the adjusting sheet 20 that passes through the first through hole 15 and the second through hole 31 at the same time, so that the position of the adjusting member 10 and the hammer assembly 2 does not move.

[0053] In this embodiment, the two groups of adjustment pieces 20 cooperate with each other to achieve a better locking effect.

[0054] In other embodiments of the present invention, the adjusting piece 20 may have different lengths. The adjusting piece 20 that only needs to pass through a portion of the first through hole 15 uses the first adjusting piece 21, and the adjusting piece 20 that needs to pass through both the first through hole 15 and the second through hole 31 uses the second adjusting piece 22. The length of the second adjusting piece 22 is different from that of the first adjusting piece 21, and the thickness is the same or a multiple relationship.

[0055] In this embodiment, adjusting pieces 20 of different lengths are selected according to different insertion positions, which is beneficial to saving materials.

[0056] In some embodiments of the present invention, the adjusting member 10 has a mounting hole 11 , a limiting hole 12 , a force-bearing hole 13 and a guide rod 14 .

[0057] In this embodiment, the mounting hole 11 is used to mount the hammer structure on the main shaft of the crusher. The limiting hole 12 and the force-bearing hole 13 are used to pass the adjusting plate 20 to adjust the length of the hammer structure. The guide rod 14 allows the adjusting member 10 to be smoothly inserted into the hammer assembly 2.

[0058] In some embodiments of the present utility model, the adjusting piece 20 includes a mounting hole 23 and a gasket 24. In this embodiment, the mounting hole 23 is provided on the adjusting piece 20 to facilitate the insertion and removal of the adjusting piece 20.

[0059] In other embodiments of the present invention, one end of the adjusting component 1 connected to the hammer component 2 is provided with an external thread, and one end of the hammer component 2 connected to the adjusting component 1 is provided with an internal thread corresponding to the external thread, and the adjusting component 1 and the hammer component 2 are connected through the thread. In actual use, by rotating the hammer component 2 or the adjusting component 1, the penetration degree of the hammer component 2 in the adjusting component 1 is changed, thereby adjusting the length of the hammer structure.

[0060] Of course, in some embodiments of the present invention, an internal thread is provided at one end of the adjusting component 1 connected to the hammer head component 2, and an external thread corresponding to the internal thread is provided at one end of the hammer head component 2 connected to the adjusting component 1, and the adjusting component 1 and the hammer head component 2 are connected via threads.

[0061] In some embodiments of the present invention, the hammer assembly 2 includes a hammer 60 and a fixing member 30. One end of the fixing member 30 is sleeve-connected with the adjusting member 10, and the other end of the fixing member 30 is detachably connected with the hammer 60.

[0062] In this embodiment, the hammer assembly 2 includes a hammer 60 and a fixing member 30, and the hammer 60 and the fixing member 30 are detachably connected, that is, the hammer 60 is a replaceable component. From the perspective of positional relationship, the hammer 60 is closer to the liner of the crusher than the fixing member 30. When the hammer 60 is worn and the sand making efficiency of ultra-fine sand cannot be guaranteed, the hammer 60 can be removed from the fixing member 30 and replaced with a new hammer 60 to enable the crusher to have a higher ultra-fine sand production efficiency.

[0063] In this embodiment, the hammer head 60 and the fixing member 30 are detachably connected. When the hammer head assembly 2 is worn to a certain extent, only the hammer head 60 part needs to be replaced without replacing the entire hammer head assembly 2, which significantly improves the utilization rate of materials and achieves material savings.

[0064] Generally speaking, the hammer head 60 is replaced only when the hammer head 60 is partially worn to about 80%, so as to improve the utilization rate of the material of the hammer head 60 as much as possible.

[0065] In some embodiments of the present invention, a first protrusion 61 is disposed at one end of the hammer head 60 connected to the fixing member 30 . A first groove 34 corresponding to the first protrusion 61 is disposed at one end of the fixing member 30 connected to the hammer head 60 .

[0066] In this embodiment, a first protrusion 61 is provided on an end face of the hammer head 60 facing away from the liner of the crusher, and a first groove body 34 corresponding to the first protrusion 61 is provided on the fixing member 30. When the hammer head 60 and the fixing member 30 are connected, the first protrusion 61 is embedded in the first groove body 34.

[0067] In this embodiment, the first protrusion 61 is embedded in the first groove 34, which, on the one hand, plays a guiding role to facilitate installation; on the other hand, it increases the contact area between the hammer head 60 and the fixing member 30, making the connection between the two more stable.

[0068] In some embodiments of the present invention, the hammer head 60 and the fixing member 30 are connected by bolts. In other words, the hammer head 60 and the fixing member 30 are connected by bolts. Specifically, the hammer head 60 is provided with a through first bolt mounting hole 62 in a direction perpendicular to the first protrusion 61, the fixing member 30 is provided with a second bolt mounting hole 36 corresponding to the first bolt mounting hole 62, and the fixing member 30 is also provided with a nut mounting hole 32.

[0069] Specifically, the bolt passes through the first bolt installation hole 62 and the second bolt installation hole 36 , and the nut is installed in the nut installation hole 32 for fixing.

[0070] In this embodiment, bolt connection is adopted, which is simple to connect and easy to disassemble, so that the hammer head 60 is easy to replace.

[0071] In some embodiments of the present invention, the hammer structure further includes two side guard plates 50, and the two side guard plates 50 are correspondingly arranged on both sides of the fixing member 30. In this embodiment, the setting of the side guard plates 50 protects the hammer structure, can reduce the wear of the fixing member 30 during the coarse particle crushing stage, thereby extending the service life of the fixing member 30 and reducing the replacement frequency of the fixing member 30.

[0072] In some embodiments of the present invention, the side guard plate 50 is provided with a second groove body 51, and the fixing member 30 is provided with a second protrusion body 33 corresponding to the second groove body 51. During the specific installation process, the second protrusion body 33 is embedded in the second groove body 51, which increases the contact area between the side guard plate 50 and the fixing member 30, making the connection between the two more stable.

[0073] In this embodiment, the second protrusion 33 not only makes the connection between the edge guard plate 50 and the fixing member 30 more stable, but also prevents the edge guard plate 50 from sliding relative to the fixing member 30, thereby playing a limiting role.

[0074] In some embodiments of the present invention, a first screw mounting hole 52 is provided on the edge guard plate 50, and a corresponding second screw mounting hole 37 is provided on the second protrusion 33. The screws are screwed into the first screw mounting hole 52 and the second screw mounting hole 37 in sequence to achieve the connection between the edge guard plate 50 and the fixing member 30.

[0075] In some embodiments of the present invention, the end of the hammer head 60 close to the lining plate is arc-shaped. Specifically, the end of the hammer head 60 close to the lining plate is set to an arc corresponding to the lining plate, so that the gap between the lining plate and the hammer head 60 is basically consistent.

[0076] Furthermore, the utility model also provides a vertical shaft hammer crusher, which includes the adjustable hammer head structure as mentioned in any of the above embodiments.

[0077] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An adjustable hammer head structure for an ultra-fine sand making machine, characterized in that: The adjustable hammer head structure for the ultra-fine sand making machine comprises: Hammer head assembly; An adjusting component is connected to the hammer assembly through a sleeve, and the sleeve length of the hammer assembly and the adjusting component is adjusted to adjust the length of the hammer structure, so that the gap between the hammer structure and the liner of the crusher is within a preset range.

2. The adjustable hammer head structure for ultra-fine sand making machine according to claim 1 is characterized in that: The adjustment component comprises: An adjusting member, wherein a peripheral wall of the adjusting member is provided with a first through hole; An adjusting plate, wherein the adjusting plate is matched with the first through hole, and the adjusting plate passes through the first through hole to adjust the length of the hammer head structure.

3. The adjustable hammer head structure for ultra-fine sand making machine according to claim 2 is characterized in that: The hammer assembly comprises a hammer and a fixing member; One end of the fixing member is sleeve-connected to the adjusting member, and the other end of the fixing member is detachably connected to the hammer head.

4. The adjustable hammer structure for ultrafine sand making machine according to claim 3 is characterized in that: A first protrusion is provided at one end of the hammer head connected to the fixing member; The fixing member is provided with a first groove body corresponding to the first protrusion body.

5. The adjustable hammer head structure according to claim 3, characterized in that: The hammer head is connected to the fixing member by bolts.

6. The adjustable hammer structure for ultra-fine sand making machine according to claim 3 is characterized in that: The hammer head structure also includes two side guard plates, and the two side guard plates are correspondingly arranged on both sides of the fixing member.

7. The adjustable hammer structure for ultra-fine sand making machine according to claim 6, characterized in that: The fixing member is provided with a second protrusion, the edge guard plate is provided with a second groove, and the second protrusion and the second groove are provided correspondingly.

8. The adjustable hammer structure for ultra-fine sand making machine according to claim 3, characterized in that: The end of the hammer head close to the lining plate is arc-shaped.

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