Coal grinding head and coal mill

Abstract

The utility model discloses a coal milling head and a coal mill, and relates to the technical field of coal milling. The coal grinding head comprises a loading connecting rod, a grinding roller and a limiting mechanism; the loading connecting rod can be driven to linearly move; the grinding roller is connected to the loading connecting rod so as to move along with the loading connecting rod; the limiting mechanism is connected to the loading connecting rod or the grinding roller and located on the side, facing the grinding bowl, of the grinding roller. The utility model solves the technical problems that the service life is influenced and potential safety hazards exist due to the contact between the existing grinding roller and the grinding bowl.

Description

Technical Field

[0001] The utility model relates to the technical field of coal grinding, in particular to a coal grinding head and a coal mill. Background Art

[0002] In the existing medium-speed bowl-type hydraulically loaded coal mill, the coal grinding head is that the loading pull rod is connected to the three-leg pressure frame and the grinding roller to press down the raw coal on the grinding bowl, and the grinding roller rolls to grind the raw coal. At present, there is no any limiting device at the bottom of the tripod, and only the external lower-in-place signal feedback is used to judge whether the grinding roller and the three-leg pressure frame are in place, so as to terminate the instruction. When the coal feeding is interrupted, the coal falling is not smooth, there is no raw coal or very little raw coal in the grinding bowl, etc., the grinding roller of the coal mill will have a certain inertia when it reaches the lower limit position, resulting in contact between the grinding roller and the grinding bowl, generating abnormal vibration, damaging some components of the coal mill, and in severe cases, generating sparks will cause an explosion of the coal mill. Summary of the Utility Model

[0003] In view of this, the utility model provides a coal grinding head and a coal mill, which are used to solve the technical problems that the existing grinding roller contacts the grinding bowl, affecting the service life and having potential safety hazards.

[0004] In order to solve the above technical problems, the first technical solution adopted by the utility model is as follows:

[0005] A coal grinding head, the coal grinding head includes:

[0006] A loading connecting rod, which can linearly move under drive;

[0007] A grinding roller, connected to the loading connecting rod so as to be able to move along with the loading connecting rod;

[0008] And a limiting mechanism, connected to the loading connecting rod or the grinding roller and located on the side of the grinding roller facing the grinding bowl.

[0009] In some embodiments of the coal grinding head, the limiting mechanism includes a plurality of limiting elements, and the limiting elements are stacked along the extending direction of the loading connecting rod, and the limiting elements are detachably connected.

[0010] In some embodiments of the coal grinding head, through holes penetrating the limiting elements along the direction of the loading connecting rod are provided on the limiting elements, so as to be able to form a detachable connection by threading fasteners into the through holes.

[0011] In some embodiments of the coal grinding head, the limiting mechanism further includes a base and an annular wall, the annular wall is connected to the base to enclose a receiving space with the base, and each of the limiting elements is received in the receiving space.

[0012] In some embodiments of the coal grinding head, the limiting mechanism further includes a first elastic component, and the first elastic component is arranged on a side of the base facing away from the limiting element.

[0013] In some embodiments of the coal grinding head, the limiting mechanism further includes a plurality of second elastic components, and each of the second elastic components is disposed between two adjacent limiting elements in a one-to-one correspondence.

[0014] In some embodiments of the coal grinding head, each of the second elastic components includes a plurality of elastic elements, and each of the elastic elements in each group of the second elastic components is evenly distributed on the limiting element.

[0015] In some embodiments of the coal mill head, the coal mill head further includes a connecting piece, the connecting piece is sleeved on the loading connecting rod, and the limiting mechanism is connected to a side wall of the connecting piece.

[0016] In some embodiments of the coal grinding head, the grinding roller is sleeved on the connecting piece and fixedly connected to the side wall of the connecting piece. The connecting piece has a protrusion protruding from the grinding roller toward the grinding bowl relative to the grinding roller, and the limiting mechanism is connected to the protrusion.

[0017] In order to solve the above technical problems, the second technical solution adopted by the utility model is:

[0018] A coal mill comprises the coal mill head described in the above embodiment.

[0019] Implementing the embodiments of the present utility model will have at least the following beneficial effects:

[0020] The above-mentioned coal grinding head is applied to a coal grinding mill, which can enable itself and the coal grinding mill to avoid the contact between the grinding roller and the grinding bowl, thereby improving the service life and safety. Specifically, the coal grinding head of the utility model can contact or bottom out with the grinding bowl before the grinding roller contacts the grinding bowl by setting a limiting mechanism, thereby avoiding the contact between the grinding roller and the grinding bowl, thereby solving the technical problem that the existing grinding roller and grinding bowl are in contact, which affects the service life and poses a safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a coal grinding head in one embodiment;

[0023] Figure 2 is Figure 1 a side view of the partial structure of the coal grinding head shown

[0024] Wherein: 1. Loading connecting rod; 2. Grinding roller; 3. Limiting mechanism; 31. Limiting element; 32. Fastening piece; 4. Base; 5. First elastic component; 6. Connecting piece Specific embodiments

[0025] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present utility model more thorough and comprehensive

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items

[0028] As Figure 1-2 shown, in an embodiment of the coal grinding head, the coal grinding head includes a loading connecting rod 1, a grinding roller 2 and a limiting mechanism 3. The loading connecting rod 1 can linearly move under drive. The grinding roller 2 is connected to the loading connecting rod 1 so as to be able to move along with the loading connecting rod 1. The limiting mechanism 3 is connected to the loading connecting rod 1 or the grinding roller 2 and is located on the side of the grinding roller 2 facing the grinding bowl

[0029] In this embodiment, by setting the limiting mechanism 3, it can contact the grinding bowl or reach the bottom before the grinding roller 2 contacts the grinding bowl, so that the grinding roller 2 can be prevented from contacting the grinding bowl, thereby solving the technical problems that the existing grinding roller 2 contacts the grinding bowl, which affects the service life and poses potential safety hazards

[0030] In an embodiment of the coal grinding head, the limiting mechanism 3 includes a plurality of limiting elements 31, and the limiting elements 31 are stacked along the extending direction of the loading connecting rod 1, and the limiting elements 31 are detachably connected

[0031] In this embodiment, by providing a plurality of limiting elements 31, it is possible to conveniently increase or decrease the adjustment, so that the gap between the grinding roller 2 and the grinding bowl can be conveniently controlled to reach an ideal position.

[0032] Specifically, the limiting element 31 may be a plate-shaped structural member. In addition, the thickness of the limiting element 31 may also be changed as required.

[0033] In an embodiment of the coal grinding head, each limiting element 31 is provided with a through hole penetrating the limiting element 31 along the direction of the loading connecting rod 1, so that a detachable connection can be formed by inserting a fastener 32 into the through hole.

[0034] In this embodiment, specifically, the fastener 32 can be a combination of a bolt and a nut. The plurality of limiting elements 31 are threaded together by the fastener 32 to form a whole, which is convenient for installation and disassembly by the staff.

[0035] In an embodiment of the coal grinding head, the limiting mechanism 3 further includes a base 4 and an annular wall, wherein the annular wall is connected to the base 4 to form a receiving space surrounded by the base 4, and each limiting element 31 is received in the receiving space.

[0036] In this embodiment, the base 4 is provided to support each limiting element 31 , and the annular wall can help each limiting element 31 to escape from the base 4 .

[0037] In an embodiment of the coal grinding head, the limiting mechanism 3 further includes a first elastic component 5 , and the first elastic component is arranged on a side of the base 4 away from the limiting element 31 .

[0038] In this embodiment, a shock-absorbing effect can be achieved by setting up a first elastic component 5. Specifically, the first elastic component 5 may include multiple elastic parts, such as two strip-shaped block structures, which can elastically support the base 4 in a more balanced manner. The elastic parts may be made of elastic materials such as silicone and rubber.

[0039] In an embodiment of the coal grinding head, the limiting mechanism 3 further includes a plurality of second elastic components, and each second elastic component is disposed between two adjacent limiting elements 31 in a one-to-one correspondence.

[0040] In this embodiment, by arranging a second elastic component between two limiting elements 31 , a shock absorbing effect can be further achieved to avoid a rigid collision between two adjacent limiting elements 31 , thereby achieving the effect of shock absorbing and improving the service life.

[0041] Specifically, each second elastic component includes a plurality of elastic elements, and each elastic element in each group of second elastic components is evenly distributed on the limiting element 31. By providing a plurality of elastic elements evenly distributed on the limiting element 31, the effect of uniform elastic support can also be achieved.

[0042] In an embodiment of the coal grinding head, the coal grinding head further includes a connecting member 6, the connecting member 6 is sleeved on the loading connecting rod 1, and the limiting mechanism 3 is connected to the side wall of the connecting member 6.

[0043] In this embodiment, by providing the connecting member 6, it is convenient to connect the loading connecting rod 1 and the limiting mechanism 3. Specifically, the connecting member 6 can be an annular structural member and can be fixedly fastened to the loading connecting rod 1 by means of bolts or the like.

[0044] Combined with the previous embodiments, it can be understood that the limiting mechanism 3 is connected to the connecting member 6 through the annular wall.

[0045] Further specifically, the grinding roller 2 is sleeved on the connecting member 6 and is fixedly connected to the side wall of the connecting member 6. The connecting member 6 has a protruding portion protruding from the grinding roller 2 toward the grinding bowl relative to the grinding roller 2, and the limiting mechanism 3 is connected to the protruding portion.

[0046] In this embodiment, by providing the protruding portion, it is convenient to install the limiting mechanism 3 and makes the limiting mechanism 3 closer to the grinding bowl side.

[0047] The present utility model also relates to a coal mill, including the coal grinding head in the previous embodiment.

[0048] By adopting the coal grinding head in the above embodiment, it is possible to prevent the grinding roller 2 from contacting the grinding bowl, thereby avoiding reducing the service life and improving safety.

[0049] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0050] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. A coal grinding head, characterized in that: The coal grinding head comprises: A loading link capable of linear motion under actuation; A connecting piece, wherein the connecting piece is sleeved on the loading connecting rod; A grinding roller, which is sleeved on the connecting member and fixedly connected to the side wall of the connecting member; and a limiting mechanism, wherein the connecting member has a protrusion protruding from the grinding roller toward the grinding bowl relative to the grinding roller, and the limiting mechanism is connected to the protrusion and is located on the side of the grinding roller facing the grinding bowl; the limiting mechanism is configured to contact or bottom out with the grinding bowl before the grinding roller when the grinding roller tends to contact with the grinding bowl due to the linear movement of the loading connecting rod, thereby avoiding direct contact between the grinding roller and the grinding bowl.

2. The coal grinding head according to claim 1, characterized in that: The limiting mechanism includes a plurality of limiting elements, each of which is stacked along the extension direction of the loading connecting rod, and each of which is detachably connected.

3. The coal grinding head according to claim 2, characterized in that: Each of the limiting elements is provided with a through hole penetrating the limiting element along the direction of the loading connecting rod, so that a detachable connection can be formed by inserting a fastener into the through hole.

4. The coal grinding head according to claim 2, characterized in that: The limiting mechanism further includes a base and an annular wall, wherein the annular wall is connected to the base to form a receiving space together with the base, and each of the limiting elements is received in the receiving space.

5. The coal grinding head according to claim 4, characterized in that: The limiting mechanism further includes a first elastic component, and the first elastic component is arranged on a side of the base away from the limiting element.

6. The coal grinding head according to claim 2, characterized in that: The limiting mechanism further comprises a plurality of second elastic components, each of which is arranged one by one between two adjacent limiting elements.

7. The coal grinding head according to claim 6, characterized in that: Each of the second elastic components includes a plurality of elastic elements, and each of the elastic elements in each group of the second elastic components is evenly distributed on the limiting element.

8. A coal mill, characterized in that: It comprises a coal grinding head as described in any one of claims 1-7.

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