A new type of risk control flow valve and grate cooler

Abstract

The present invention discloses a new type of risk control flow valve and a grate cooler bed. The risk control flow valve includes a valve body. The lower side of the valve body is an air inlet, and the upper side thereof is an air outlet. The inner diameter of the valve body gradually decreases from the air inlet to the air outlet direction. A fixed cross beam of the central axis of the air inlet is fixed on the valve body on the air inlet side, and a fixed cross beam of the central axis of the air outlet is fixed on the valve body on the air outlet side. A central axis is fixed between the fixed cross beam of the central axis of the air inlet and the fixed cross beam of the central axis of the air outlet. A valve core is slidably connected to the outside of the central axis, and the outer diameter of the valve core is smaller than the inner diameter of the air outlet. The present invention has the advantages of simple structure, convenient manufacturing and installation, flexible and smooth adjustment of the valve core, small wear, strong adaptability to the external environment, good docking and interchangeability with existing equipment, etc.

Description

Technical Field

[0001] The present invention relates to the field of cement manufacturing equipment, and particularly to a new type of air control flow valve and grate cooler bed. Background Art

[0002] The cooler is one of the main and key equipment applied in the cement building materials industry and the metallurgical industry, and undertakes the main functions such as cooling, conveying, crushing of cement production clinker and system heat recovery, etc. Using air as the medium to cool the clinker, the quality of the clinker cooling effect directly affects the crystallization characteristics of the clinker particles and the calorific value recovered by heat exchange. With good cooling effect, the crystal grains of the clinker are fine and there are many microcracks, which is beneficial to the improvement of cement grinding and cement strength. Moreover, the corresponding calorific value recovered by heat exchange is high, and the temperatures of the secondary and tertiary air are guaranteed. On the one hand, it improves the operation efficiency of the kiln, and on the other hand, it can greatly reduce the economic cost. The cooler has developed to the structural form of the fifth-generation stepping horizontal bed, and the cooling air supply of its grate plate adopts the centralized air supply form, in which the air control flow valve controls the air flow volume of each grate plate in each area. The current main structures of the air control valve are the pendulum valve flap type and the elastic sheet type, but there are situations such as insensitive reaction or poor actual use effect, resulting in uneven cooling of the clinker in a certain area on the grate cooler bed, and phenomena such as red materials in the discharged materials. Therefore, whether the air control valve can flexibly adjust the air flow volume of each grate plate according to the load under the grate and the load in the air chamber will greatly affect the cooling effect of the discharged clinker. Summary of the Invention

[0003] The purpose of the present invention is to provide a new type of air control flow valve and grate cooler bed in view of the deficiencies existing in the prior art.

[0004] To achieve the above purpose, the present invention provides a new type of air control flow valve, including a valve body. The lower side of the valve body is the air inlet, and its upper side is the air outlet. The inner diameter of the valve body gradually decreases from the air inlet to the air outlet direction. A fixed cross beam of the air inlet central axis is fixed on the valve body on the air inlet side, and a fixed cross beam of the air outlet central axis is fixed on the valve body on the air outlet side. A central axis is fixed between the fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis. A valve core is slidably connected to the outside of the central axis, and the outer diameter of the valve core is smaller than the inner diameter of the air outlet.

[0005] Further, first magnets are respectively arranged inside the fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis, and second magnets are arranged at positions on the valve core opposite to the first magnets, and the sides of the second magnets with the same polarity as the first magnets are arranged opposite to each other.

[0006] Further, the first magnets and the second magnets are respectively fixedly arranged in the middle parts of the fixed cross beam of the air inlet central axis, the fixed cross beam of the air outlet central axis and the valve core. The first magnets and the second magnets are in a ring shape, and they are both sleeved on the outside of the central axis.

[0007] Further, both the first magnet and the second magnet are neodymium iron boron magnets.

[0008] Further, a limiting ring is arranged outside the first magnet. The first magnet and the limiting ring are respectively bonded to the inner sides of the fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis. The second magnet includes two parts, which are respectively bonded to the upper and lower sides of the valve core.

[0009] Further, the fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis are respectively welded to the valve body. The upper end of the central axis is fixedly welded to the fixed cross beam of the air outlet central axis, and the lower end of the central axis is fixedly connected to the fixed cross beam of the air inlet central axis by bolts.

[0010] Further, a fixed bracket is fixed in the middle of the outer side of the valve body.

[0011] Further, the outer shape of the valve core is frustum-shaped, and a plurality of ventilation balance holes are arranged in the middle thereof.

[0012] Further, the ventilation balance holes include 4 to 8, and they are arranged in a circular array centered on the center of the valve core.

[0013] In a second aspect, the present invention also provides a grate bed, which includes a module main beam and a plurality of grate plates arranged on the upper side of the module main beam. A new type of air control flow valve as described above is provided on the module main beam under each grate plate.

[0014] Beneficial effects: The present invention has the advantages of simple structure, convenient manufacturing and installation, flexible and smooth adjustment of the valve core, small wear, strong adaptability to the external environment, good docking and interchangeability with existing equipment, etc. Description of the Drawings

[0015] Figure 1 is a three-dimensional structural schematic diagram of the new type of air control flow valve according to the embodiment of the present invention;

[0016] Figure 2 is a sectional structural schematic diagram of the new type of air control flow valve according to the embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the new type of air control flow valve in the state of maximum air volume according to the embodiment of the present invention;

[0018] Figure 4 is a schematic diagram of the new type of air control flow valve in the state of minimum air volume according to the embodiment of the present invention;

[0019] Figure 5 is a partial structural schematic diagram of the grate bed according to the embodiment of the present invention. Detailed Embodiments

[0020] The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments. These embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0021] As Figures 1 to 4 shown, an embodiment of the present invention provides a new type of risk control flow valve, which includes a valve body 1. The lower side of the valve body 1 is an air inlet 2, and the upper side thereof is an air outlet 3. The valve body 1 is a reducing pipe. Specifically, the inner diameter of the valve body 1 gradually decreases from the air inlet 2 to the air outlet 3. An air inlet central axis fixing cross beam 4 is fixed on the valve body 1 on the air inlet 2 side, and an air outlet central axis fixing cross beam 5 is fixed on the valve body 1 on the air outlet 3 side. A central axis 6 is fixed between the air inlet central axis fixing cross beam 4 and the air outlet central axis fixing cross beam 5. A valve core 7 is slidably connected to the outside of the central axis 6. The valve core 7 can reciprocate up and down along the axis on the central axis 6. The reciprocating up and down movement changes the ventilation area between the valve body 1 and the valve core 7, thereby correcting and adjusting the size of the cooling air volume. When the valve core 7 is at the bottom end, the ventilation area is the largest. When the valve core 7 is at the top end, the ventilation area is the smallest. The outer diameter of the valve core 7 is smaller than the inner diameter of the air outlet 3, so as to ensure that when the valve core 7 is at the uppermost end, the smallest ventilation volume is ensured. The central axis 6 is preferably made of austenitic stainless steel and is non-magnetic, so there is an equal gap between the valve core 7 and the central axis 6. After the valve core 7 is made, it is galvanized and passivated throughout, with good smoothness, and the quality of the valve core 7 is relatively light. The above points determine that the frictional force suffered by the valve core 7 when moving up and down on the central axis 6 can be ignored compared to loads such as under the grate. The valve core 7 can move up and down flexibly under relevant loads to adjust the ventilation area size until it is balanced.

[0022] On the inner sides of the air inlet central axis fixing cross beam 4 and the air outlet central axis fixing cross beam 5 of the embodiment of the present invention, first magnets 8 are respectively provided. Second magnets 9 are provided at positions on the valve core 7 opposite to the first magnets 8. The first magnets 8 and the second magnets 9 are preferably made of neodymium iron boron magnets. The sides of the second magnets 9 opposite to the sides with the same polarity as the first magnets 8 are arranged relatively, so that when the valve core 7 is at the bottom end and the top end positions of the central axis 6, a repulsive force is generated between the first magnets 8 and the second magnets 9, ensuring that the valve core 7 and the central axis 6 do not get stuck or collided at the two extreme positions, making the movement of the valve core 7 more sensitive and smooth. As a preferred embodiment, the first magnets 8 and the second magnets 9 are respectively fixedly arranged in the middle parts of the air inlet central axis fixing cross beam 4, the air outlet central axis fixing cross beam 5 and the valve core 7. The first magnets 8 and the second magnets 9 are arranged in a ring shape, and they are both sleeved on the outside of the central axis 6.

[0023] To facilitate the fixation of the first magnet 8 and the second magnet 9 on the air inlet central axis fixing crossbeam 4, the air outlet central axis fixing crossbeam 5, and the valve core 7 respectively, a limiting ring 10 is provided outside the first magnet 8. After the first magnet 8 and the limiting ring 10 are paired, they are adhesively fixed on the air inlet central axis fixing crossbeam 4 and the air outlet central axis fixing crossbeam 5 with strong glue. Preferably, two second magnets 9 are used, and the two second magnets 9 are respectively adhesively bonded to the upper and lower sides of the valve core 7 with strong glue.

[0024] In the embodiment of the present invention, the air inlet central axis fixing crossbeam 4 and the air outlet central axis fixing crossbeam 5 are respectively preferably welded to the valve body 1. The upper end of the central axis 6 is also preferably welded and fixed to the air outlet central axis fixing crossbeam 5, and the lower end of the central axis 6 is preferably bolted and fixed to the air inlet central axis fixing crossbeam 4. Specifically, a threaded hole can be opened at the center of the lower end of the central axis 6, and a bolt 11 is passed through the air inlet central axis fixing crossbeam 4 and screwed into the threaded hole of the central axis 6. To facilitate the installation of this device on the grate bed, a fixing bracket 12 is fixed in the middle of the outer side of the valve body 1. Fixing holes can be provided on the fixing bracket 12, and the fixing bracket 12 can be fixed to the grate bed through bolts.

[0025] In the embodiment of the present invention, the outer shape of the valve core 7 is preferably frustum-shaped, so that the outer bevel edge matches the inner shape of the valve body 1. A plurality of ventilation balance holes 13 are provided in the middle of the valve core 7. The ventilation balance holes 13 include 4 to 8, preferably 6. The plurality of ventilation balance holes 13 are preferably arranged in a circular array centered on the center of the valve core 7 to make the ventilation and force application uniform. When the material layer on the grate plate changes, the air volume can be increased through the ventilation balance holes 13 to instantaneously change the load at the upper and lower ends of the valve core, and the upper and lower positions of the valve core 7 can be adjusted in time to correct the ventilation air volume.

[0026] As Figure 5 shown, based on the above embodiments, those skilled in the art can understand that the present invention also provides a grate bed on the other hand, which includes a module main beam 14 and a plurality of grate plates 15 arranged on the upper side of the module main beam 14. A new type of air control flow valve as described above is provided on the module main beam 14 under each grate plate 15.

[0027] The working principle of the present invention is:

[0028] Each grate plate 15 is individually equipped with a risk control flow valve. Each grate plate 15, module main beam 14, and risk control flow valve form a separate small space, and each air chamber as a whole forms a large space. During normal operation, when there is a large amount of material powder or a thick material layer on the grate plate 15, the ventilation resistance of the grate plate 15 is large. When the sum of the load on the upper part of the valve core 7 (i.e., the load in the separate small space under the grate plate) and the self-weight of the valve core is greater than the sum of the repulsive forces between the overall air chamber load and the magnet, the valve core 7 moves downward, increasing the ventilation area between the valve body 1 and the valve core 7, increasing the air volume until the upper and lower loads are balanced, achieving the most suitable air volume required for the material. Conversely, when there is less material or larger particle crystals on the grate plate 15, the ventilation resistance of the grate plate 15 is small. When the sum of the load on the upper part of the valve core 7 and the self-weight of the valve core 7 is less than the sum of the repulsive forces between the overall air chamber load and the magnet, the valve core 7 moves upward, reducing the ventilation area between the valve body 1 and the valve core 7, reducing the air volume until the upper and lower loads are balanced.

[0029] The above description is only the preferred implementation mode of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, the other parts not specifically described belong to the prior art or common general knowledge. Without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A new type of risk control flow valve, Characterized in that, It includes a valve body. The lower side of the valve body is the air inlet, and the upper side is the air outlet. The inner diameter of the valve body gradually decreases from the air inlet to the air outlet direction. A fixed cross beam of the air inlet central axis is fixed on the valve body on the air inlet side, and a fixed cross beam of the air outlet central axis is fixed on the valve body on the air outlet side. A central axis is fixed between the fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis. A valve core is slidably connected to the outside of the central axis, and the outer diameter of the valve core is smaller than the inner diameter of the air outlet; On the inner sides of the fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis, there are respectively a first magnet. At the position on the valve core opposite to the first magnet, there is a second magnet, and the sides of the second magnet and the first magnet with the same polarity are arranged opposite to each other; The first magnet and the second magnet are respectively fixedly arranged in the middle of the fixed cross beam of the air inlet central axis, the fixed cross beam of the air outlet central axis and the valve core. The first magnet and the second magnet are in a ring shape, and both are sleeved on the outside of the central axis; The outer shape of the valve core is in a frustum shape, and there are multiple ventilation balance holes in the middle of it; The ventilation balance holes include 4 to 8, and they are arranged in a circular array with the center of the valve core as the center.

2. The new type of risk control flow valve according to claim 1, Characterized in that, Both the first magnet and the second magnet are neodymium iron boron magnets.

3. The new type of risk control flow valve according to claim 1, Characterized in that, A limiting ring is arranged outside the first magnet. The first magnet and the limiting ring are respectively bonded to the inner sides of the fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis. The second magnet includes two, which are respectively bonded to the upper and lower sides of the valve core.

4. The new type of risk control flow valve according to claim 1, Characterized in that, The fixed cross beam of the air inlet central axis and the fixed cross beam of the air outlet central axis are respectively welded to the valve body. The upper end of the central axis is welded and fixed to the fixed cross beam of the air outlet central axis, and the lower end of the central axis is bolted and fixed to the fixed cross beam of the air inlet central axis.

5. The new type of risk control flow valve according to claim 1, Characterized in that, A fixed bracket is fixed in the middle of the outside of the valve body.

6. A grate bed, including a module main beam and several grate plates arranged on the upper side of the module main beam, Characterized in that, On the module main beam under each grate plate, there is a new type of risk control flow valve according to any one of claims 1 to 5.

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