A safety protection grid for cement rotary kiln operation

Abstract

A safety protection grid for working inside a cement rotary kiln belongs to the field of building technology. The safety protection grid for working inside a cement rotary kiln includes a first frame, a second frame, a third frame and a fourth frame. The first frame, the second frame, the third frame and the fourth frame have the same structure. The first frame, the second frame, the third frame and the fourth frame all have two columns, a crossbeam and an arch beam. The tops of the two columns are fixedly connected with an arch beam and a crossbeam from top to bottom in sequence. The outer wall of each arch beam is fixedly connected with a plurality of eyebolt groups. The tops of the first frame, the second frame, the third frame and the fourth frame are all connected by a nylon rope protection net. The present invention makes the safety protection grid have high tensile deformability and high bearing strength by installing a first folding plate, a second folding plate and a third folding plate between the first frame, the second frame, the third frame and the fourth frame.

Description

Technical Field

[0001] The invention belongs to the field of building technology, and in particular relates to a safety protection grid frame for operations inside a cement rotary kiln. Background Art

[0002] Cement is the most important raw material for the development of the national economy. It is a product obtained by feeding the raw material powder or raw material slurry made of scientifically formulated raw materials into the cement kiln for calcination into cement clinker and then grinding. In the process of cement production, the kiln is the core device.

[0003] The development of cement is a gradual process. Similarly, cement production technology is also constantly improving, maturing and improving with the development of social productivity and science and technology, which has led to the technical development of cement kilns and the replacement of kiln types. Starting from the use of bottle kilns for burning lime in 1842 to burn Portland cement, it has experienced warehouse kilns in 1824, vertical kilns in 1884 (including ordinary vertical kilns and mechanical vertical kilns), dry rotary kilns in 1895 (including dry hollow kilns, waste heat power generation kilns, and dry long kilns), and wet rotary kilns in 1912 (including ordinary wet kilns, slurry evaporator wet kilns, and wet long kilns). After a long period of dry and wet disputes, the technical development direction finally tended to dry rotary kilns, and gradually developed and improved into the existing new dry rotary kilns.

[0004] With the development of cement production technology in the world, my country's cement clinker production field has completely eliminated backward production lines such as cement vertical kilns, and fully implemented the application of new dry-process rotary kiln calcination to produce cement clinker.

[0005] The outer surface of the dry rotary kiln production line is a metal pipe, and the inner wall is a magnesia refractory brick. When the cement clinker is fired in normal production, the surface of the 0.2-meter-thick refractory brick layer becomes a high-temperature resistant layer after being melted at high temperature. With the production, the kiln body keeps rotating, and the fuel and calcined materials in the kiln are constantly rubbed and mixed with the high-temperature resistant layer, and the inner wall of the kiln forms an irregular and large-scale uneven shape, similar to stalactites. Such a refractory layer will be worn by the constantly rotating materials inside for a long time, resulting in local thinning or local damage and leakage. This is one of the damage factors of the refractory layer during normal operation, and it is also normal damage. Another is intermittent production. The temperature in the kiln changes repeatedly, causing the refractory layer and the refractory brick layer to repeatedly expand and contract and then break, thereby destroying the refractory layer. Both types of damage to the refractory layer require manual entry into the kiln body for repair, replacing refractory bricks or repairing the refractory layer. When personnel enter the kiln body for construction operations, the refractory brick layer has collapsed many times, causing serious casualties. The density of magnesia refractory bricks is about 3.0, and the collapse and damage of a 20 cm thick brick layer is quite terrible. The current construction plan is that personnel directly enter the kiln to carry out construction operations without safety protection. The problem is that there is currently no safety protection grid that can be used in the new dry process cement rotary kiln. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides a safety protection grid for working inside a cement rotary kiln, which can make the safety protection grid have high tensile deformability and high bearing strength, and is suitable for the large-scale irregular and uneven base surface inside the cement rotary kiln, reducing casualties of workers in the cement rotary kiln, and playing a role of continuous shielding and protection through the nylon rope protection net.

[0007] In order to achieve the above-mentioned object, the present invention provides a cement rotary kiln operation safety protection grid frame, comprising a first frame, a second frame, a third frame and a fourth frame, wherein the first frame, the second frame, the third frame and the fourth frame have the same structure, and the first frame, the second frame, the third frame and the fourth frame all have two columns, a cross beam and an arch beam, and the tops of the two columns are fixedly connected with the arch beam and the cross beam in sequence from top to bottom, and the outer wall of each arch beam is fixedly connected with a plurality of eyebolt groups, and the tops of the first frame, the second frame, the third frame and the fourth frame are all connected by a nylon rope protection net;

[0008] The two columns at the left and right ends of the first frame and the fourth frame are provided with two symmetrical first bolt groups in sequence from top to bottom, and the two columns at the left and right ends of the second frame and the third frame are provided with two symmetrical second bolt groups in sequence from top to bottom. The first frame and the fourth frame are hierarchically cross-connected with four first folding plates and four second folding plates through the first bolt groups, each of the second folding plates is connected to the third folding plate through a third bolt group, and each of the third folding plates is screwed to the second frame and the third frame respectively through the second bolt group, a first limiting plate is clamped between the first bolt group and the second bolt group at the bottom of the side wall of one end of the third frame and the fourth frame, and a second limiting plate is clamped between the first bolt group and the second bolt group at the bottom of the side wall of the other end of the third frame and the fourth frame.

[0009] Preferably, a fixing bolt group is welded between the column and the telescopic leg, and the fixing bolt group includes a third nut and a butterfly-shaped hand-tightening bolt.

[0010] Preferably, the eyebolt assembly comprises an eyebolt and a first nut.

[0011] Preferably, the first bolt group includes a first bolt, a gasket, a gasket plate and a second nut, and the first bolt group is connected from left to right in sequence: a first bolt, two gaskets, three gaskets, two gaskets, three gaskets, two gaskets and two second nuts.

[0012] Preferably, the second bolt group includes a gasket, a gasket plate, a second nut, and a second bolt, and the second bolt group is connected in sequence from left to right with a second bolt, two gaskets, a gasket plate, two gaskets, and a second nut.

[0013] Preferably, the third bolt group includes a gasket, a second nut and a third bolt, and the third bolt group is connected with a third bolt, three gaskets and a second nut in sequence from left to right.

[0014] Beneficial effects: The present invention installs the first folding plate, the second folding plate and the third folding plate between the first frame, the second frame, the third frame and the fourth frame to ensure that the safety protection grid has high tensile deformability and high bearing strength, and is suitable for the large-scale irregular and uneven base surface inside the cement rotary kiln, reducing casualties of workers in the cement rotary kiln, and playing a continuous shielding and protection role through the nylon rope protection net. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of the first frame in the safety protection grid for cement rotary kiln operations provided by the present invention;

[0016] Figure 2A schematic diagram of the structure of the second frame in the safety protection grid for cement rotary kiln operations provided by the present invention;

[0017] Figure 3 A schematic diagram of the structure of the third frame in the safety protection grid for cement rotary kiln operations provided by the present invention;

[0018] Figure 4 A schematic diagram of the structure of the fourth frame in the safety protection grid for cement rotary kiln operations provided by the present invention;

[0019] Figure 5 A right side view of the safety protection grid frame for working inside the cement rotary kiln provided by the present invention;

[0020] Figure 6 A left view of the safety protection grid frame for working in a cement rotary kiln provided by the present invention;

[0021] Figure 7 A schematic diagram of the structure of a fixing bolt group in a safety protection grid for cement rotary kiln operations provided by the present invention;

[0022] Figure 8 A schematic diagram of the structure of the eye bolts in the safety protection grid for cement rotary kiln operations provided by the present invention;

[0023] Fig. 9 A schematic diagram of the structure of telescopic legs and eyebolts in a cement rotary kiln operation safety protection grid provided by the present invention;

[0024] Fig.10 A schematic diagram of the structure of the first bolt group in the safety protection grid for cement rotary kiln operations provided by the present invention;

[0025] Fig.11 A schematic diagram of the structure of the second bolt group in the safety protection grid for in-kiln operation of a cement rotary kiln provided by the present invention;

[0026] Fig.12 This is a schematic structural diagram of the third bolt group in the safety protection grid for in-kiln operations of a cement rotary kiln provided by the present invention.

[0027] In the figure: 1 is the first frame; 2 is the second frame; 3 is the third frame; 4 is the fourth frame; 5 is the column; 6 is the crossbeam; 7 is the supply beam; 8 is the telescopic leg; 9 is the fixing bolt group. 901 is the third nut; 902 is the butterfly hand-tightening bolt, 10 is the nylon rope protection net; 11 is the eye bolt group; 1101 is the eye bolt; 1102 is the first nut; 12 is the first folding plate; 13 is the second folding plate; 14 is the third folding plate; 15 is the first limiting plate; 16 is the second limiting plate; 17 is the first bolt group; 18 is the second bolt group; 19 is the third bolt group; 20 is the first bolt; 21 is the gasket; 22 is the gasket; 23 is the second nut; 24 is the second bolt; 25 is the third bolt. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0029] like Figure 1-12 As shown, the present invention provides a cement rotary kiln operation safety protection grid frame, comprising a first frame body 1, a second frame body 2, a third frame body 3 and a fourth frame body 4, wherein the first frame body 1, the second frame body 2, the third frame body 3 and the fourth frame body 4 have the same structure, wherein the first frame body 1, the second frame body 2, the third frame body 3 and the fourth frame body 4 all have two columns 5, a cross beam 6 and an arch beam 7, wherein the tops of the two columns 5 are sequentially fixedly connected with the arch beam 7 and the cross beam 6 from top to bottom, wherein the outer wall of each arch beam 7 is fixedly connected with a plurality of eyebolt groups 11, wherein the tops of the first frame body 1, the second frame body 2, the third frame body 3 and the fourth frame body 4 are all connected by a nylon rope protection net 10, wherein the nylon rope protection net 10 has the characteristics of light weight, and the nylon rope protection net 10 can be arbitrarily deformed with the stretching and compression of the grid frame, and is used to buffer the impact force of falling objects, and plays a role of continuous shielding and protection;

[0030] The two columns 5 at the left and right ends of the first frame 1 and the fourth frame 4 are provided with two groups of symmetrical first bolt groups 17 from top to bottom, and the two columns 5 at the left and right ends of the second frame 2 and the third frame 3 are provided with two groups of symmetrical second bolt groups 18 from top to bottom. The first frame 1 and the fourth frame 4 are cross-connected with four first folding plates 12 and four second folding plates 13 in a hierarchical manner through the first bolt groups 17, each of the second folding plates 13 is connected to the third folding plate 14 through a third bolt group 19, and each of the third folding plates 14 is screwed to the second frame 2 and the third frame 3 through the second bolt group 18, respectively. The equidistant parallelogram structure composed of the first folding plates 12, the second folding plates 13 and the third folding plates 14 can make the first frame 1 and the second frame 4 stretched arbitrarily laterally. The distance between any two of the frames among the third frame 2, the third frame 3 and the fourth frame 4, thereby driving the lateral stretching or shortening of the overall safety protection grid, a first limit plate 15 is clamped between the first bolt group 17 and the second bolt group 18 at the bottom of the side wall of one end of the third frame 3 and the fourth frame 4, and a second limit plate 16 is clamped between the first bolt group 17 and the second bolt group 18 at the bottom of the side wall of the other end of the third frame 3 and the fourth frame 4, and the first limit plate 15 and the second limit plate 16 are clamped on the outer wall of the pad 22 to further fix the entire grid, the first folding plate 11 and the second folding plate 12 are spaced from the column 5 by h1, the third folding plate 3 and the column are spaced by h3, and h2 is the distance from the column 5 to the farthest second nut 23 in the second bolt group 18 and the third bolt group 19, h4 is the distance from the column 5 to the second bolt on the farthest side in the bolt group 2 and the bolt group 3, and the length relationship ratio is h1>h2>h3>h4. This ensures that there will be no collision between the folding plates during the lateral tensile and compression movement of the grid. The hole spacing of the through holes of the first bolt group 17, the second bolt group 18 and the third bolt group 19 installed at the upper and lower parts of each column 5 is doubled, which solves the problem of friction damage of the nylon rope protection net 10 caused by the folding height of the first folding plate 12 or the third folding plate 14 at the upper end exceeding the nylon rope protection net 10 after the safety protection grid is compressed to the rear side.

[0031] As a further improvement of the present invention, a fixing bolt group 9 is welded between the column 5 and the telescopic leg 8, and the fixing bolt group 9 includes a third nut 901 and a butterfly hand-tightening bolt 902, and the telescopic leg 8 at the bottom of each column 5 can be independently adjusted in length by the butterfly hand-tightening bolt 902 in the fixing bolt group 9, so as to adapt to various significantly uneven working base surfaces.

[0032] As a further improvement of the present invention, the eyebolt group 11 includes an eyebolt 1101 and a first nut 1102, and the eyebolt group 11 is used to connect and fix the entire grid.

[0033] As a further improvement of the present invention, the first bolt group 17 includes a first bolt 20, a gasket 21, a gasket plate 22 and a second nut 23. The first bolt group 17 is connected from left to right in sequence with a first bolt 20, two gaskets 21, three gaskets 22, two gaskets 21, three gaskets 23, two gaskets 21 and two second nuts 23.

[0034] As a further improvement of the present invention, the second bolt group 18 includes a gasket 21, a gasket plate 22, a second nut 23, and a second bolt 24. The second bolt group 18 is connected from left to right in sequence with a second bolt 24, two gaskets 21, a gasket plate 22, two gaskets 21 and a second nut 23.

[0035] As a further improvement of the present invention, the third bolt group 19 includes a washer 21, a second nut 23 and a third bolt 25. The third bolt group 19 is connected with a third bolt 25, three washers 21 and a second nut 23 in sequence from left to right.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A safety protection grid for cement rotary kiln operation, characterized in that: The invention comprises a first frame (1), a second frame (2), a third frame (3) and a fourth frame (4); the first frame (1), the second frame (2), the third frame (3) and the fourth frame (4) have the same structure; the first frame (1), the second frame (2), the third frame (3) and the fourth frame (4) all have two upright posts (5), a cross beam (6) and an arch beam (7); the tops of the two upright posts (5) are fixedly connected with an arch beam (7) and a cross beam (6) in sequence from top to bottom; the outer wall of each arch beam (7) is fixedly connected with a plurality of eyebolt groups (11); the tops of the first frame (1), the second frame (2), the third frame (3) and the fourth frame (4) are all connected via a nylon rope protective net (10); Two columns (5) at the left and right ends of the first frame (1) and the fourth frame (4) are provided with two symmetrical first bolt groups (17) in sequence from top to bottom, and two columns (5) at the left and right ends of the second frame (2) and the third frame (3) are provided with two symmetrical second bolt groups (18) in sequence from top to bottom. The first frame (1) and the fourth frame (4) are cross-connected with four first folding plates (12) and four second folding plates (13) in layers through the first bolt groups (17), and each of the second folding plates (13) is connected through a first bolt group (18). The three bolt groups (19) are connected to the third folding plate (14), and each of the third folding plates (14) is screwed to the second frame (2) and the third frame (3) respectively through the second bolt group (18). A first limit plate (15) is clamped between the first bolt group (17) and the second bolt group (18) at the bottom of the side wall at one end of the third frame (3) and the fourth frame (4), and a second limit plate (16) is clamped between the first bolt group (17) and the second bolt group (18) at the bottom of the side wall at the other end of the third frame (3) and the fourth frame (4).

2. According to claim 1, a safety protection grid for cement rotary kiln operation, characterized in that: A fixing bolt group (9) is welded between the upright column (5) and the telescopic leg (8), and the fixing bolt group (9) comprises a third nut (901) and a butterfly-shaped hand-tightening bolt (902).

3. According to claim 1, a safety protection grid for cement rotary kiln operation, characterized in that: The eyebolt assembly (11) comprises an eyebolt (1101) and a first nut (1102).

4. According to claim 1, a safety protection grid for cement rotary kiln operation, characterized in that: The first bolt group (17) comprises a first bolt (20), a washer (21), a pad (22) and a second nut (23); the first bolt group (17) is connected in sequence from left to right with a first bolt (20), two washers (21), three pads (22), two washers (21), three pads (22), two washers (21) and two second nuts (23).

5. According to claim 1, a safety protection grid for cement rotary kiln operation, characterized in that: The second bolt group (18) comprises a washer (21), a backing plate (22), a second nut (23), and a second bolt (24); the second bolt group (18) is connected in sequence from left to right to a second bolt (24), two washers (21), a backing plate (22), two washers (21), and a second nut (23).

6. According to claim 1, a safety protection grid for cement rotary kiln operation, characterized in that: The third bolt group (19) comprises a washer (21), a second nut (23) and a third bolt (25); the third bolt group (19) is connected in sequence from left to right with a third bolt (25), three washers (21) and a second nut (23).

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