Unpowered jacking mechanism for kiln door of graphite electrode tunnel kiln

Abstract

The utility model discloses a graphite electrode tunnel kiln door unpowered jacking mechanism in the technical field of tunnel kilns, which comprises a support, a cylindrical rack, a gear, a rocker arm and a pressing plate, copper sleeves are arranged on two sides of the support, the cylindrical rack is slidably mounted in the copper sleeves, and one end of the cylindrical rack jacks the tunnel kiln door. A rocker arm shaft is rotationally installed in the support and is perpendicular to the cylindrical rack, and a gear is fixed to the rocker arm shaft and meshed with the cylindrical rack. A pressing plate is hinged to the tail end of the rocker arm, and one side of the pressing plate is fixedly connected with the tunnel kiln door. A spring positioning ring is fixed to the cylindrical rack through a set screw, the cylindrical rack is sleeved with a compression spring, and the compression spring is located between the spring positioning ring and the copper sleeve on the right side. The device is simple in structure, low in maintenance cost, energy-saving and environment-friendly, and the self weight of the tunnel kiln door is used as power for jacking.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel kilns, in particular to an unpowered tightening mechanism for a graphite electrode tunnel kiln door. Background Art

[0002] Tunnel kilns are essential for graphite electrode production. The sealing performance of tunnel kilns is crucial for ensuring product quality and production efficiency. Currently, tunnel kiln door sealing is typically achieved using a hydraulic workstation driving multiple hydraulic cylinders. Specifically, the hydraulic workstation uses a motor to drive an oil pump, delivering hydraulic oil to the hydraulic cylinders. The hydraulic cylinders then retract and expand to tighten the kiln door, ensuring a seal between it and the tunnel kiln. However, this traditional hydraulic drive method presents the following issues:

[0003] 1. High cost: The construction of a hydraulic workstation requires multiple components, including a motor, oil pump, oil tank, pressure regulating valve, reversing valve, and other parts, as well as complex hydraulic piping and hydraulic cylinders. The purchase and installation costs of these components are high, increasing the overall equipment investment cost.

[0004] 2. High maintenance workload: The hydraulic system requires regular inspection and maintenance, including replacement of hydraulic oil, maintenance of valve components, etc. These tasks not only increase the maintenance workload, but also increase maintenance costs.

[0005] 3. High energy consumption: Since a motor is required to drive the oil pump, the operation of the hydraulic system consumes a lot of electricity, which not only increases production costs, but also places a certain burden on the environment.

[0006] In view of the above problems, the existing tunnel kiln door sealing technology has obvious shortcomings in cost, maintenance and energy consumption. There is an urgent need for a more economical and environmentally friendly solution to replace the existing hydraulic drive method. Utility Model Content

[0007] The main purpose of the utility model is to provide a non-powered tightening mechanism for a graphite electrode tunnel kiln door, which is used to solve the problems mentioned in the background technology.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0009] A non-powered tightening mechanism for a graphite electrode tunnel kiln door comprises a tunnel kiln, the kiln opening of which is tightened by the tightening mechanism, and a sealing strip is provided between the kiln and the door. The tightening mechanism comprises a support, a cylindrical rack, a gear, a rocker arm, and a pressure plate. Copper sleeves are provided on either side of the support, within which a cylindrical rack is slidably mounted, with one end of the cylindrical rack tightening the kiln door. A rocker shaft is rotatably mounted within the support, perpendicular to the cylindrical rack. A gear is fixed to the rocker shaft, meshing with the cylindrical rack. A rocker arm is mounted at one end of the rocker shaft, and a pressure plate is hingedly connected to the end of the rocker arm. One side of the pressure plate is fixedly connected to the tunnel kiln door. A spring retaining ring is fixed to the cylindrical rack via a set screw, and a compression spring is mounted on the cylindrical rack, located between the spring retaining ring and the copper sleeve on the right side.

[0010] By adjusting the fixing position of the spring positioning ring, the initial pressure of the compression spring can be adjusted.

[0011] Furthermore, a positioning adjustment assembly is installed at one end of the cylindrical rack. This assembly includes an adjustment screw and a retraction nut. The retraction nut is installed in the copper sleeve on the right side, and the adjustment screw is installed in the retraction nut. The positioning adjustment assembly is used to adjust the initial extension length of the cylindrical rack, ensuring that the various tightening mechanisms installed on the tunnel kiln door can tighten the tunnel kiln door simultaneously.

[0012] Furthermore, bearings are provided on both sides of the rocker arm shaft, and the bearings are fixed on the supports.

[0013] Furthermore, an isolation sleeve is installed on the rocker shaft, and the isolation sleeve is located between the bearing and the gear.

[0014] Furthermore, the bearing is a seated outer spherical bearing.

[0015] Furthermore, a lifting motor for raising and lowering the tunnel kiln door is provided on the top of the tunnel kiln door.

[0016] Furthermore, the tunnel kiln door is provided with 6 tightening mechanisms.

[0017] This utility model also includes other components that enable the unpowered tightening mechanism of the graphite electrode tunnel kiln door to function properly. These devices or components utilize conventional techniques in the art. Furthermore, devices and components not otherwise specified in this utility model utilize conventional techniques in the art, such as the gears, compression springs, and bearings described herein. During implementation, appropriate device or component models can be selected based on the specific work scenario.

[0018] The working principle of the present utility model is as follows: a tightening mechanism tightens the tunnel kiln door against the tunnel kiln, and a sealing strip is provided between the tunnel kiln and the tunnel kiln door to compensate for the gap caused by unevenness between the tunnel kiln and the tunnel kiln door. The tunnel kiln door is provided with six tightening mechanisms. A pressure plate is fixed to the tunnel kiln door. When the hoisting motor pulls the tunnel kiln door down and closes, the tunnel kiln door drives the pressure plate and rocker arm to rotate 90 degrees around the rocker arm shaft. The rocker arm shaft drives the gear to rotate, and the gear engages with the cylindrical rack to transmit the transmission, so that the cylindrical rack extends from one side of the support to tighten the tunnel kiln door. When the tunnel kiln door is lifted, the compression spring pushes the relevant components to reset. The spring locating ring is fixed by a set screw. By adjusting the fixing position of the spring locating ring, the initial pressure of the compression spring can be adjusted. The positioning adjustment component can adjust the initial extension length of the cylindrical rack to ensure that the six tightening mechanisms installed on the tunnel kiln door can tighten the tunnel kiln door simultaneously.

[0019] Compared with the prior art, the utility model has the following beneficial effects: simple structure, low maintenance cost, using the deadweight of the tunnel kiln door as power for tightening, energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the main view of the utility model.

[0021] Figure 2 For the Figure 1 Cross-sectional view in the AA direction.

[0022] Figure 3 It is a right view of the utility model.

[0023] Figure 4 For the Figure 3 Cross-sectional view along the BB direction.

[0024] Figure 5 This is a diagram of the usage state of the utility model.

[0025] In the figure: 1. Tunnel kiln; 2. Sealing strip; 3. Tunnel kiln door; 4. Tightening mechanism; 5. Cylindrical rack; 6. Copper sleeve; 7. Support; 8. Gear; 9. Spring locating ring; 10. Compression spring; 11. Retraction nut; 12. Adjusting screw; 13. Rocker arm; 14. Pressure plate; 15. Bearing; 16. Rocker arm shaft; 17. Isolation sleeve. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0027] Example:

[0028] like Figures 1 to 5As shown, a non-powered tightening mechanism for a graphite electrode tunnel kiln door comprises a tunnel kiln 1, with a tightening mechanism 4 tightening a tunnel kiln door 3 at the kiln entrance of the tunnel kiln 1. A sealing strip 2 is provided between the tunnel kiln 1 and the tunnel kiln door 3. The tightening mechanism 4 comprises a support 7, a cylindrical rack 5, a gear 8, a rocker arm 13, and a pressure plate 14. Copper sleeves 6 are provided on both sides of the support 7, within which a cylindrical rack 5 is slidably mounted. One end of the cylindrical rack 5 tightens the tunnel kiln door 3. A rocker shaft 16 is rotatably mounted within the support 7. The rocker shaft 16 is perpendicular to the cylindrical rack 5 and is fixed with a gear 8, which meshes with the cylindrical rack 5. A rocker arm 13 is mounted at one end of the rocker shaft 16. A pressure plate 14 is hingedly connected to the end of the rocker arm 13. One side of the pressure plate 14 is fixedly connected to the tunnel kiln door 3. A spring positioning ring 9 is fixed to the cylindrical rack 5 by means of a set screw. A compression spring 10 is sleeved on the cylindrical rack 5 . The compression spring 10 is located between the spring positioning ring 9 and the copper sleeve 6 on the right side.

[0029] In addition, a positioning adjustment assembly is installed at one end of the cylindrical rack 5. The positioning adjustment assembly includes an adjustment screw 12 and a retraction nut 11. The retraction nut 11 is installed in the copper sleeve 6 on the right side, and the adjustment screw 12 is installed in the retraction nut 11. Bearings 15 are installed on both sides of the rocker shaft 16, and the bearings 15 are fixed to the support 7. A spacing sleeve 17 is installed on the rocker shaft 16 and is located between the spacing sleeve 17 and the gear 8. A lifting motor for raising and lowering the tunnel kiln door 3 is installed at the top.

[0030] Specifically, the bearing 15 is a seated outer spherical bearing. The tunnel kiln door 3 is provided with six tightening mechanisms 4.

[0031] The working principle of the unpowered tightening mechanism for a graphite electrode tunnel kiln door disclosed in the utility model is as follows: a tightening mechanism 4 tightens the tunnel kiln door 3 against the tunnel kiln 1. A sealing strip 2 is provided between the tunnel kiln 1 and the tunnel kiln door 3 to compensate for any unevenness caused by the gap between the tunnel kiln 1 and the tunnel kiln door 3. The tunnel kiln door 3 is provided with six tightening mechanisms 4. A pressure plate 14 is fixed to the tunnel kiln door 3. When the lifting motor lowers and closes the tunnel kiln door 3, the tunnel kiln door 3 drives the pressure plate 14 and the rocker arm 13 to rotate 90 degrees about the rocker arm shaft 16. The rocker arm shaft 16 drives the gear 8 to rotate, which meshes with the cylindrical rack 5, causing the cylindrical rack 5 to extend from one side of the support 7 and tighten against the tunnel kiln door 3. When the tunnel kiln door 3 is lifted, a compression spring 10 pushes the relevant components to reset. A spring retaining ring 9 is secured by a set screw. By adjusting the fixed position of the spring retaining ring 9, the initial pressure of the compression spring 10 can be adjusted. The positioning adjustment component can adjust the initial extension length of the cylindrical rack 5 to ensure that the six tightening mechanisms 4 installed on the tunnel kiln door 3 can tighten the tunnel kiln door 3 at the same time.

[0032] The above embodiments are only descriptions of the preferred implementation methods of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection of the present invention.

Claims

1. A graphite electrode tunnel kiln door unpowered tightening mechanism, comprising a tunnel kiln (1), a tunnel kiln door (3) being tightened at the kiln opening of the tunnel kiln (1) by a tightening mechanism (4), a sealing strip (2) being provided between the tunnel kiln (1) and the tunnel kiln door (3), and characterized in that: The tightening mechanism (4) comprises a support (7), a cylindrical rack (5), a gear (8), a rocker arm (13) and a pressure plate (14). Copper sleeves (6) are provided on both sides of the support (7). A cylindrical rack (5) is slidably installed in the copper sleeve (6). One end of the cylindrical rack (5) tightens the tunnel kiln door (3). A rocker arm shaft (16) is rotatably installed in the support (7). The rocker arm shaft (16) is perpendicular to the cylindrical rack (5) and a gear (8) is fixed on the rocker arm shaft (16). The gear (8) is meshed with the cylindrical rack (5); a rocker arm (13) is installed at one end of the rocker arm shaft (16), and a pressure plate (14) is hinged at the end of the rocker arm (13), and one side of the pressure plate (14) is fixed to the tunnel kiln door (3); a spring positioning ring (9) is fixed on the cylindrical rack (5) by a set screw, and a compression spring (10) is sleeved on the cylindrical rack (5), and the compression spring (10) is located between the spring positioning ring (9) and the copper sleeve (6) on the right side.

2. The unpowered tightening mechanism for the graphite electrode tunnel kiln door according to claim 1 is characterized in that: One end of the cylindrical rack (5) is provided with a positioning adjustment component, which includes an adjusting screw (12) and a retraction nut (11). The retraction nut (11) is installed in the copper sleeve (6) on the right side, and the adjusting screw (12) is installed in the retraction nut (11).

3. The unpowered tightening mechanism for the graphite electrode tunnel kiln door according to claim 1 is characterized in that: Bearings (15) are provided on both sides of the rocker arm shaft (16), and the bearings (15) are fixed on the support (7).

4. The unpowered tightening mechanism for the graphite electrode tunnel kiln door according to claim 3 is characterized by: An isolation sleeve (17) is installed on the rocker arm shaft (16), and the isolation sleeve (17) is located between the bearing (15) and the gear (8).

5. The unpowered tightening mechanism for the graphite electrode tunnel kiln door according to claim 3 is characterized in that: The bearing (15) is an outer spherical bearing with a seat.

6. The unpowered tightening mechanism for the graphite electrode tunnel kiln door according to claim 1 is characterized in that: A lifting motor for lifting the tunnel kiln door (3) is provided on the top of the tunnel kiln door (3).

7. The unpowered tightening mechanism for the graphite electrode tunnel kiln door according to claim 1 is characterized in that: The tunnel kiln door (3) is provided with six tightening mechanisms (4).

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