Movable kiln door

Abstract

The utility model belongs to the technical field of rotary kiln doors, and particularly relates to a movable kiln door. Comprising a frame composed of a transverse frame and a vertical frame, a sliding rail composed of a transverse groove formed in the transverse frame and a penetrating groove formed in the vertical frame in a penetrating mode, two door bodies connected to the interior of the frame in a sliding mode, and a sealing body installed on the inner wall of the side, close to a kiln head cover, of the frame. The door further comprises a controller and a pressure sensor installed between the frame and the door body, a pressure applying device is further installed on the frame, the output end of the pressure sensor is connected with the signal input end of the controller, and the pressure sensor is used for providing signals of pressure between the door body and the frame for the controller. When the controller judges that the pressure between the door body and the frame exceeds a preset threshold value range, the controller controls operation of the pressure applying device, and therefore the door body and the frame are attached in a sealed mode.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of kiln door of rotary kiln, specifically relates to a movable kiln door. BACKGROUND

[0002] In the kiln operation process, the stability and the sealing of the kiln door have the vital influence to the thermal efficiency, the energy consumption and the product quality of the kiln, and the kiln door of cement rotary kiln adopts two horizontally slidable door bodies, and the door body slides to both sides when being subjected to external force to reach the effect of opening and sealing the cement rotary kiln.

[0003] But the rotary kiln has certain high temperature under the working state, and the kiln head cover is communicated with the rotary kiln, so the kiln head cover also has certain high temperature, under the high temperature state, the internal airflow of the kiln head cover is easily extruded to the kiln door, and certain impact force is generated to the kiln door, then the kiln door is loose and the gap is generated between the kiln door and the frame, and the loose kiln door is easily leaked to the high temperature flue gas, not only influences the air environment, but also easily causes the physical injury to the nearby staff, and has certain safety hidden danger. CONTENT

[0004] In view of the above problems, the utility model aims at providing a movable kiln door to solve the problems in the background.

[0005] The utility model provides a movable kiln door, including the frame that is constituted by horizontal edge frame and vertical edge frame, the slide rail that is constituted by horizontal slot of being set up in the inside of horizontal edge frame and the through slot of being set up in the inside of vertical edge frame, two door bodies of being slidably connected in the inside of frame and the sealing body of being installed in the inner wall of the frame near kiln head cover, still including controller and pressure sensor of being installed between frame and door body, still be installed with pressure applying device on the frame, the output of pressure sensor is connected with the signal input end of controller, is used for providing the signal of pressure between door body and frame to controller, when the controller judges that the pressure between door body and frame exceeds the preset threshold range, the controller controls the operation of pressure applying device, so that door body and frame seal and fit.

[0006] Preferably, the pressure sensor is a first pressure sensor installed between the door body away from the kiln head cover side and the frame inner wall, when the first pressure sensor monitors that the pressure between the door body and the frame is greater than the preset threshold, the controller controls the pressure applying device to operate, and applies the pressure close to the kiln head cover side to the door body, realizing the sealing and fitting of the door body and the frame.

[0007] Preferably, the pressure sensor is a second pressure sensor installed between the door body and the inner wall of the frame near the kiln head cover side, and when the second pressure sensor monitors that the pressure between the door body and the frame is less than a preset threshold, the controller controls the pressure applying device to operate to apply pressure to the door body near the kiln head cover side, so as to realize the sealing and fitting of the door body and the frame.

[0008] Preferably, the number of the first pressure sensors on each door body is multiple, and the multiple first pressure sensors are uniformly distributed on the part of the door body in contact with the frame.

[0009] Preferably, the number of the second pressure sensors on each door body is multiple, and the multiple second pressure sensors are uniformly distributed on the part of the door body in contact with the frame.

[0010] Preferably, the pressure applying device comprises two fixed plates symmetrically installed on the frame and having sliding grooves in the interiors thereof, a mounting frame arranged outside the door body and having two ends in sliding connection with the two sliding grooves respectively, and a driving piece fixedly connected to the mounting frame and having a pressure plate connected to one end thereof near the door body.

[0011] Preferably, the fixed plate extends from one vertical frame to the other vertical frame, and the length of the fixed plate is greater than the distance between the two vertical frames.

[0012] The pressure sensor (the first pressure sensor or the second pressure sensor) is installed on the frame, the signal of the pressure between the door body and the frame can be monitored in real time and fed back to the controller, when the pressure between the door body and the frame exceeds the preset threshold range, the controller controls the operation of the pressure applying device, so that the door body and the frame are sealed and fitted. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0014] Figure 2 It is a sectional structure schematic view of the first embodiment of the utility model;

[0015] Figure 3 It is an enlarged structure schematic view of A in the utility model;

[0016] Figure 4 It is a sectional structure schematic view of the second embodiment of the utility model;

[0017] Figure 5 It is an enlarged structure schematic view of B in the utility model;

[0018] Figure 6 It is a sectional structure schematic view of the third embodiment of the utility model;

[0019] Figure 7 It is the amplification structure schematic view of the utility model in C place;

[0020] Figure 8 It is the side view cross section structure schematic view of the utility model;

[0021] Figure 9 It is the structure schematic view of the utility model in the state of pressure applying device moving to kiln mouth one side.

[0022] In the drawing: 1, horizontal frame; 2, vertical frame; 3, frame; 4, horizontal groove; 5, through groove; 6, slide rail; 7, door body; 8, sealing body; 9, controller; 10, first pressure sensor; 11, pressure applying device; 12, second pressure sensor; 13, sliding groove; 14, fixed plate; 15, mounting bracket; 16, pressure applying plate; 17, driving part; 18, connecting buckle; 19, bolt; 20, screw rod; 21, pulley. DETAILED DESCRIPTION

[0023] In order to make those skilled in the art better understand the technical scheme of the utility model, the utility model is described in detail below in conjunction with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

[0024] The movable kiln door of the utility model, which mainly comprises a frame 3 composed of horizontal frames 1 and vertical frames 2, is installed at the kiln mouth of a kiln head cover, and the kiln head cover is connected with the cylinder of a rotary kiln, wherein the number of the horizontal frames 1 and the vertical frames 2 is both set to two, the two horizontal frames 1 are located on the upper and lower sides of the two vertical frames 2, the slide rail 6 on the frame 3 is composed of a horizontal groove 4 opened in the horizontal frame 1 and a through groove 5 opened in the vertical frame 2, two door bodies 7 are slidably connected on the slide rail 6, pulleys 21 are installed at the top end and the bottom end of the two door bodies 7, the friction between the door body 7 and the frame 3 can be reduced, the sliding of the door body 7 is facilitated, the closure of the kiln mouth is realized by sliding the two door bodies 7 along the slide rail 6 to the side close to the kiln mouth, the sliding of the door body 7 can be controlled by a power assembly (such as a hydraulic cylinder, a transmission screw rod, etc., not shown in the drawing), in order to prevent the high-temperature gas in the kiln from leaking out along the gap between the door body 7 and the frame 3, a sealing body 8 is installed on the side of the frame 3 close to the kiln head cover, the material of the sealing body 8 can be graphite fiber gasket, asbestos gasket and other high-temperature-resistant and corrosion-resistant materials, after the two door bodies 7 are close to each other and tightly fit, the connecting buckles 18 on the two door bodies 7 are connected and fixed by the bolts 19, in order to increase the stability of the door body 7, the connecting buckles 18 can also be additionally installed on the two sides of the door body 7, the door body 7 is connected and fixed with the outer wall of the kiln head cover, the limiting of the door body 7 is realized, and the above is the introduction of the existing movable kiln door.

[0025] From the above, the existing movable kiln door in use, there are the following defects, namely because the rotary kiln in the working state will have a certain high temperature, and the kiln head cover and rotary kiln are connected, so the kiln head cover also has a certain high temperature, in the high temperature state, easy to make the internal airflow of kiln head cover extrusion kiln door, produce a certain impact force to the kiln door, the door body 7 fixed mode in the prior art, usually in the direction of the slide rail 6 fixed, to avoid the door body 7 along the slide rail 6 moves, and the pressure in the direction of the high temperature airflow is insufficient, in turn cause the kiln door loose and produce gap between the frame 3, and the loose kiln door is easy to leak with high temperature flue gas, not only affect the air environment, at the same time easy to cause the nearby staff physical injury, have certain security risks.

[0026] Based on the above problems, the utility model adopts the following improvement mode to solve, as shown in Figures 1-9 The difference between the prior art is that a controller 9 and a pressure sensor are added, the pressure sensor is installed between the frame 3 and the door body 7, and is used for monitoring the pressure signal between the door body 7 and the frame 3, the controller 9 is connected with the pressure sensor, and provides the pressure signal between the door body 7 and the frame 3 to the controller 9, and the frame 3 is also provided with a pressing device 11 (the pressing device 11 is a power system capable of pushing the door body 7 to one side of the kiln head cover), specifically, in order for the person skilled in the art to clearly understand the function of the pressing device 11, an implementation mode of the pressing device 11 is given, which is used for realizing that the door body 7 can be pushed to one side of the kiln head cover, the pressing device 11 can be two fixed plates 14 symmetrically installed on the frame 3 and having sliding grooves 13 in the inside, an installation frame 15 arranged on the outside of the door body 7 and having both ends slidingly connected with the two sliding grooves 13 respectively, and a driving piece 17 fixedly connected with the installation frame 15 and having a pressing plate 16 connected with one end close to the door body 7, as shown in Figure 1The driving member 17 can be a hydraulic cylinder, and the length of the fixed plate 14 is greater than the distance between the two vertical frames 2, and the fixed plate 14 extends from one vertical frame 2 to the other vertical frame 2, thereby expanding the moving range of the pressing device 11. Specifically, after the door body 7 is fixed, the entire pressing device 11 is slid along the sliding groove 13 to the front of the two door bodies 7, and the screw rod 20 is inserted into the fixed plate 14 to limit the fixed plate 14. When the controller 9 determines that the pressure between the door body 7 and the frame 3 exceeds the preset threshold range, the controller 9 controls the operation of the pressing device 11, so that the door body 7 and the frame 3 are tightly attached. When it is necessary to open the kiln door, the limiting of the mounting frame 15 by the screw rod 20 is released, the mounting frame 15 is driven by the driving member 17 to move away from the door body 7, and the mounting frame 15 is slid along the sliding groove 13 away from the kiln port, so as not to affect the normal opening and closing of the door body 7. The above is only one preferred implementation of the pressing device 11, and other implementation modes of the pressing device 11 can also be used in the specific implementation of the present application, as long as the door body 7 can be pushed to the side of the kiln head cover. Here, it is not necessary to be described in detail.

[0027] Further, as shown in Figures 2-3 the first embodiment of the present application, the pressure sensor is a first pressure sensor 10 installed between the door body 7 away from the kiln head cover and the inner wall of the frame 3. In the initial state, the door body 7 is tightly attached to the first pressure sensor 10, and the first pressure sensor 10 can sense the pressure applied by the door body 7. This pressure is used as a preset pressure threshold. When the high-temperature gas flow in the kiln applies pressure to the door body 7 away from the kiln head cover, the door body 7 deviates towards the first pressure sensor 10, causing the pressure value monitored by the first pressure sensor 10 to be greater than the preset pressure threshold, indicating that a gap is formed between the door body 7 and the frame 3. The first pressure sensor 10 transmits the pressure signal to the controller 9, and the controller 9 controls the driving member 17 to move the pressing plate 16 towards the door body 7, thereby applying a force to the door body 7 in the opposite direction of the high-temperature gas flow, and achieving tight attachment of the door body 7 and the frame 3. As the door body 7 gradually approaches the inside of the kiln head cover, when the first pressure sensor 10 monitors that the pressure value is equal to or within the preset pressure threshold, the signal is transmitted to the controller 9. The controller 9 analyzes the stress state of the kiln door by algorithm according to the received pressure signal, and adjusts the output pressure of the pressing device 11 in real time to maintain the stable sealing of the kiln door, thereby avoiding damage caused by uneven stress on the kiln door. In order to increase the contact area between the pressing plate 16 and the door body 7, the shape of the pressing plate 16 can be rectangular, circular or elliptical, etc. Figure 1As shown, the pressure plate 16 in this embodiment is preferably rectangular. When the pressure plate 16 applies pressure to the two door bodies 7, the four outer corners of the pressure plate 16 are respectively fitted with the four inner corners of the rectangular frame formed by the two vertical side frames 2 and the two horizontal side frames 1, so that the door body 7 and the frame 3 can be tightly fitted. In order to obtain more accurate pressure distribution information in a timely manner, multiple first pressure sensors 10 can be evenly installed in the part where the door body 7 contacts the frame 3, which can prevent the pressure monitoring from being incorrect due to the insensitivity of a certain pressure sensor.

[0028] Furthermore, such as Figures 4-5 As shown in the second embodiment of this utility model, the pressure sensor is a second pressure sensor 12 installed between the door 7 near the kiln head hood and the inner wall of the frame 3. In the initial state, the door 7 and the second pressure sensor 12 are tightly fitted, and the second pressure sensor 12 can sense the pressure applied by the door 7. This pressure is used as a preset pressure threshold. When the high-temperature airflow in the kiln applies pressure to the door 7 away from the kiln head hood, the door 7 shifts away from the second pressure sensor 12, causing the second pressure sensor 12 to fail to detect the pressure of the door 7 or to detect a pressure lower than the preset pressure threshold. This indicates that a gap has formed between the door 7 and the frame 3, and the pressure signal is transmitted to the controller 9. The controller 9 controls the drive component 17 to operate, causing it to drive... The pressure plate 16 moves towards the side closer to the door body 7, applying pressure to the door body 7 in the opposite direction to the high-temperature airflow, thus achieving a tight fit between the door body 7 and the frame 3. As the door body 7 gradually moves closer to the inside of the kiln hood, when the second pressure sensor 12 detects that the pressure value is equal to the preset threshold, it transmits the signal to the controller 9. The controller 9 analyzes the stress state of the kiln door through an algorithm based on the received pressure signal and adjusts the output pressure of the pressure device 11 in real time to maintain the stable seal of the kiln door and avoid damage caused by uneven stress on the kiln door. In order to obtain more accurate pressure distribution information in a timely manner, multiple second pressure sensors 12 can be evenly installed at the contact part between the door body 7 and the frame 3, which can prevent the pressure monitoring from being incorrect due to the insensitivity of a certain pressure sensor.

[0029] Furthermore, such as Figures 6-7As shown, the third embodiment of the utility model, pressure sensor can also be installed between the frame 3 inner wall and the door body 7 away from the kiln head cover one side first pressure sensor 10 and installed between the frame 3 inner wall and the door body 7 close to the kiln head cover one side second pressure sensor 12, when initial state, door body 7 and first pressure sensor 10 and second pressure sensor 12 are closely attached, first pressure sensor 10 is the pressure of door body 7 to it as the first preset pressure threshold, second pressure sensor 12 is the pressure of door body 7 to it as the second preset pressure threshold, at this time, the first preset pressure threshold and the second preset pressure threshold are close to the same, when the high-temperature airflow in the kiln applies the pressure of door body 7 away from the kiln head cover one side, door body 7 is offset to the side close to first pressure sensor 10, so that the pressure value monitored by first pressure sensor 10 is greater than the first preset pressure threshold, and the pressure value monitored by second pressure sensor 12 is less than the second preset pressure threshold, indicating that door body 7 and frame 3 produce gap, first pressure sensor 10 and second sensor respectively pass the above pressure signal to controller 9, and controller 9 controls driving part 17 to operate, so that it drives pressure plate 16 to move to the side close to door body 7, and applies the force opposite to the pressure direction of high-temperature airflow to door body 7, realizes the close attachment of door body 7 and frame 3, along with door body 7 gradually close to the inside of kiln head cover, the pressure value monitored by first pressure sensor 10 gradually reduces, and the pressure value monitored by second pressure sensor 12 gradually rises, until the pressure value monitored by first pressure sensor 10 and second pressure sensor 12 are same with the first preset pressure threshold or the second preset pressure threshold, at this time, controller 9 receives the pressure signal, analyzes the stress state of kiln door through algorithm, adjusts the output pressure of pressure device 11 in real time to keep the stable sealing of kiln door, avoids the damage of kiln door due to uneven stress.

Claims

1. A movable kiln door, comprising a frame (3) formed by a horizontal frame (1) and a vertical frame (2), a sliding rail (6) formed by a horizontal slot (4) opened in the horizontal frame (1) and a through slot (5) opened in the vertical frame (2), two door bodies (7) slidingly connected in the frame (3), and a sealing body (8) installed on the inner wall of the frame (3) near the kiln head cover side, characterized in that: The controller (9) and the pressure sensor installed between the frame (3) and the door body (7) are further included, the pressure applying device (11) is further installed on the frame (3), the output end of the pressure sensor is connected with the signal input end of the controller (9), and the signal of the pressure between the door body (7) and the frame (3) is provided to the controller (9), when the controller (9) judges that the pressure between the door body (7) and the frame (3) exceeds the preset threshold range, the controller (9) controls the operation of the pressure applying device (11), so that the door body (7) and the frame (3) are tightly attached.

2. A movable kiln door according to claim 1, characterized in that: The pressure sensor is a first pressure sensor (10) installed between the door body (7) away from the kiln head cover side and the inner wall of the frame (3), when the first pressure sensor (10) monitors that the pressure between the door body (7) and the frame (3) is greater than the preset threshold, the controller (9) controls the operation of the pressure applying device (11), and the pressure close to the kiln head cover side is applied to the door body (7), so that the door body (7) and the frame (3) are tightly attached.

3. A movable kiln door according to claim 1, characterized in that: The pressure sensor is a second pressure sensor (12) installed between the door body (7) close to the kiln head cover side and the inner wall of the frame (3), when the second pressure sensor (12) monitors that the pressure between the door body (7) and the frame (3) is less than the preset threshold, the controller (9) controls the operation of the pressure applying device (11), and the pressure close to the kiln head cover side is applied to the door body (7), so that the door body (7) and the frame (3) are tightly attached.

4. A movable door according to claim 2, characterized in that: The number of the first pressure sensor (10) on each door body (7) is multiple, and the multiple first pressure sensors (10) are uniformly distributed on the part of the door body (7) in contact with the frame (3).

5. A movable door according to claim 3, characterized in that: The number of the second pressure sensor (12) on each door body (7) is multiple, and the multiple second pressure sensors (12) are uniformly distributed on the part of the door body (7) in contact with the frame (3).

6. A movable door according to claim 1, characterized in that: The pressure applying device (11) comprises two fixed plates (14) which are symmetrically installed on the frame (3) and have sliding grooves (13) in the interiors thereof, a mounting frame (15) which is arranged outside the door body (7) and has two ends in sliding connection with the two sliding grooves (13) respectively, and a driving piece (17) which is fixedly connected to the mounting frame (15) and has a pressure applying plate (16) connected to one end close to the door body (7).

7. A movable kiln door according to claim 6, characterized in that: The fixed plate (14) extends from one vertical frame (2) to the other vertical frame (2), and the length of the fixed plate (14) is greater than the distance between the two vertical frames (2).

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