A locking device for the upper edge of a kiln door of a wood heat treatment kiln
Patent Information
- Application Number
- CN202522347460.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-11-05
AI Technical Summary
现有技术中用于木材热处理窑的锁紧装置通常由安装在窑体上的活节螺栓、锁紧螺母以及固定在窑门边缘的卡板构成，这种结构的的锁紧装置用于窑门上缘锁紧时，在开关窑门的过程中需要使活节螺栓、锁紧螺母完全脱离卡板的U形豁口后停留在不影响窑门开关的位置，由于活节螺栓安装在与窑口端面平行的水平锁紧轴上，活节螺栓和锁紧螺母在重力作用下会自然下坠到窑门上缘或卡板上而干扰窑门的开关，为了克服开关窑门过程中锁紧装置对窑门的影响，需要工人对活节螺栓和锁紧螺母持续托举，而工人为了托举活节螺栓和锁紧螺母需要站在窑门近前，不但影响窑门的快速开关，也构成的安全隐患，尤其是在窑门上缘设置多套锁紧装置时，前述弊端更突出
[0010]Beneficial Effects: The locking device for the upper edge of the kiln door of this utility model for wood heat treatment kilns features a hinged bolt suspension device located on the kiln body above the horizontal locking shaft. This device allows the hinged bolt to disengage from the U-shaped notch and suspend above the kiln door during opening and closing. The hinged bolt suspension device includes a support cantilever fixed to the kiln body above the kiln opening, with a locking nut gripping device at the end of the support cantilever. During kiln door opening and closing, the locking nut gripping device allows the hinged bolt and locking nut to disengage from the clamping plate and remain above the kiln opening. This overcomes the drawback of requiring workers to continuously lift the hinged bolt and locking nut, enabling rapid opening and closing of the kiln door and eliminating the safety hazard of workers standing near the kiln door, thus improving the safety of production operations. Furthermore, the use of a permanent magnet fixed to the end of the support cantilever for the hinged bolt gripping device and a ferromagnetic metal nut for the locking nut makes the gripping and releasing of the locking nut by the hinged bolt gripping device more convenient, and repeated use over a long period will not cause mechanical damage to the locking nut and hinged bolt. The use of an elastic buckle fixed to the end of the support cantilever in the locking nut gripping device makes equipment production more convenient and cost-effective, and the locking nut and hinge bolt are not limited by ferromagnetic materials. The inclusion of a locking sleeve that slides axially along the hinge bolt with the locking nut, and a thrust bearing between the locking sleeve and the locking nut, prevents contact friction between the locking nut and the clamping plate during tightening, making locking and unlocking operations easier and providing greater locking force. Furthermore, the presence of a bearing housing near the locking sleeve of the locking nut for embedding the thrust bearing, with the locking sleeve inserted within the bearing housing, prevents damage to the bearing from external impacts or the entry of impurities that could affect its operation. Because of the technical features of having radial limiting screws installed on the tube wall of the bearing housing and an annular groove on the outer tube wall of the locking sleeve that mates with the radial limiting screws, the locking sleeve, thrust bearing and locking nut can be easily assembled together. Under the premise of fixing the bearing and preventing the locking sleeve from separating from the bearing housing, the relative rotation between the locking sleeve and the bearing housing will not be affected, making the locking and unlocking operations more convenient.
Smart Images
Figure CN224755527U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a kiln door locking device for a wood heat treatment kiln, and more particularly to a locking device installed above the rectangular kiln opening of a wood heat treatment kiln to lock the upper edge of the kiln door to the kiln body. Background Technology
[0002] Large wood heat treatment kilns with rectangular cross-sections require the use of flat kiln doors to seal the rectangular kiln opening. One edge of the flat kiln door is hinged to the kiln body. Since the height and width of such flat kiln doors are usually more than 2 meters, in order to ensure the sealing effect of the kiln door, in addition to installing locking devices on the opposite side of the hinge, locking devices also need to be installed on the upper and lower edges of the flat kiln door. In existing technology, locking devices for wood heat treatment kilns typically consist of hinged bolts, locking nuts installed on the kiln body, and a clamping plate fixed to the edge of the kiln door. When this type of locking device is used to lock the upper edge of the kiln door, the hinged bolts and locking nuts need to be completely disengaged from the U-shaped notch of the clamping plate and remain in a position that does not affect the opening and closing of the kiln door during the opening and closing process. Since the hinged bolts are installed on a horizontal locking shaft parallel to the end face of the kiln opening, the hinged bolts and locking nuts will naturally fall to the upper edge of the kiln door or the clamping plate under the action of gravity, thus interfering with the opening and closing of the kiln door. In order to overcome the influence of the locking device on the kiln door during the opening and closing process, workers need to continuously lift the hinged bolts and locking nuts. However, in order to lift the hinged bolts and locking nuts, workers need to stand close to the kiln door, which not only affects the rapid opening and closing of the kiln door but also poses a safety hazard. This drawback is even more prominent when multiple sets of locking devices are installed on the upper edge of the kiln door. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a locking device for the upper edge of the kiln door of a wood heat treatment kiln, which addresses the above-mentioned shortcomings of the existing technology. The hinge bolt and locking nut in the locking device can be conveniently and quickly stopped in a position that does not interfere with the opening and closing of the kiln door. While ensuring the sealing effect of the kiln door, it does not affect the rapid opening and closing of the kiln door and has good safety.
[0004] The technical solution adopted to solve the technical problem is as follows: A locking device for the upper edge of the kiln door of a wood heat treatment kiln, including a locking shaft seat fixed above the kiln opening, a horizontal locking shaft parallel to the end face of the kiln opening mounted on the locking shaft seat, a hinged bolt that can rotate around the horizontal locking shaft mounted on the horizontal locking shaft, a locking nut that is threadedly engaged with the hinged bolt mounted on the hinged bolt, a locking plate that engages with the locking nut fixed on the upper edge of the kiln door, a U-shaped notch at the upper edge of the locking plate for the hinged bolt rod to pass through the plate, and a hinged bolt suspension device fixed on the kiln body above the horizontal locking shaft for the hinged bolt to be suspended above the kiln door after disengaging from the U-shaped notch. The hinged bolt suspension device includes a supporting cantilever fixed on the kiln body above the kiln opening, and a locking nut gripping device at the end of the supporting cantilever.
[0005] As a further improvement of this utility model: the hinge bolt gripping device is a permanent magnet fixed to the end of the support cantilever, and the locking nut is a ferromagnetic metal nut.
[0006] As a further improvement of this utility model: the locking nut gripping device is an elastic buckle fixed to the end of the support cantilever that can grip the locking nut.
[0007] As a further improvement of this utility model: a locking sleeve is also fitted on the hinge bolt, which slides along the axial direction of the hinge bolt together with the locking nut, and a thrust bearing is installed between the locking sleeve and the locking nut.
[0008] As a further improvement of this utility model: a bearing housing for mounting a thrust bearing is provided at the end of the locking nut near the locking sleeve, and the locking sleeve is inserted into the bearing housing.
[0009] As a further improvement of this utility model: a radial limiting screw is installed on the tube wall of the bearing housing sleeve, and an annular groove that cooperates with the radial limiting screw is provided on the outer tube wall of the locking sleeve.
[0010] Beneficial Effects: The locking device for the upper edge of the kiln door of this utility model for wood heat treatment kilns features a hinged bolt suspension device located on the kiln body above the horizontal locking shaft. This device allows the hinged bolt to disengage from the U-shaped notch and suspend above the kiln door during opening and closing. The hinged bolt suspension device includes a support cantilever fixed to the kiln body above the kiln opening, with a locking nut gripping device at the end of the support cantilever. During kiln door opening and closing, the locking nut gripping device allows the hinged bolt and locking nut to disengage from the clamping plate and remain above the kiln opening. This overcomes the drawback of requiring workers to continuously lift the hinged bolt and locking nut, enabling rapid opening and closing of the kiln door and eliminating the safety hazard of workers standing near the kiln door, thus improving the safety of production operations. Furthermore, the use of a permanent magnet fixed to the end of the support cantilever for the hinged bolt gripping device and a ferromagnetic metal nut for the locking nut makes the gripping and releasing of the locking nut by the hinged bolt gripping device more convenient, and repeated use over a long period will not cause mechanical damage to the locking nut and hinged bolt. The use of an elastic buckle fixed to the end of the support cantilever in the locking nut gripping device makes equipment production more convenient and cost-effective, and the locking nut and hinge bolt are not limited by ferromagnetic materials. The inclusion of a locking sleeve that slides axially along the hinge bolt with the locking nut, and a thrust bearing between the locking sleeve and the locking nut, prevents contact friction between the locking nut and the clamping plate during tightening, making locking and unlocking operations easier and providing greater locking force. Furthermore, the presence of a bearing housing near the locking sleeve of the locking nut for embedding the thrust bearing, with the locking sleeve inserted within the bearing housing, prevents damage to the bearing from external impacts or the entry of impurities that could affect its operation. Because of the technical features of having radial limiting screws installed on the tube wall of the bearing housing and an annular groove on the outer tube wall of the locking sleeve that mates with the radial limiting screws, the locking sleeve, thrust bearing and locking nut can be easily assembled together. Under the premise of fixing the bearing and preventing the locking sleeve from separating from the bearing housing, the relative rotation between the locking sleeve and the bearing housing will not be affected, making the locking and unlocking operations more convenient. Attached Figure Description
[0011] Figure 1 This is a cross-sectional view of the hinge bolt of the upper edge locking device of the wood heat treatment kiln door of this utility model when it falls into the U-shaped notch; Figure 2 This is a cross-sectional view of the locking device for the upper edge of the kiln door of the wood heat treatment kiln of this utility model when the hinge bolt is suspended above the kiln door. Figure 3 This is an enlarged cross-sectional view of the locking nut portion in the upper edge locking device of the kiln door of the wood heat treatment kiln of this utility model. Figure 4This is a three-dimensional structural diagram of the elastic buckle used in another embodiment of the locking device for the upper edge of the kiln door of the wood heat treatment kiln of this utility model. Detailed Implementation
[0012] like Figure 1 As shown, the upper edge locking device of the kiln door of the wood heat treatment kiln of this utility model includes a locking shaft seat 16 fixed above the kiln opening 14. The locking shaft seat is welded to the kiln body 1. A horizontal locking shaft 15 parallel to the end face of the kiln opening is mounted on the locking shaft seat. The two ends of the horizontal locking shaft are fixed on the locking shaft seat. A hinged bolt 5 that can rotate around the horizontal locking shaft is mounted on the horizontal locking shaft. A locking nut 7 that is threadedly engaged with the hinged bolt is mounted on the hinged bolt. A locking plate 6 that engages with the locking nut is fixed on the upper edge of the kiln door 13. The locking plate is parallel to the kiln opening 14. At the kiln opening end face, support ribs 4 are welded to both ends of the locking plate to improve the tensile strength of the locking plate. A U-shaped notch 17 is provided on the upper edge of the locking plate to allow the hinge bolt to pass through the plate. The opening of the U-shaped notch faces upward. On the kiln body above the horizontal locking shaft, there is also a hinge bolt suspension device that allows the hinge bolt to disengage from the U-shaped notch and suspend above the kiln door during the opening and closing of the kiln door. This ensures that the hinge bolt and locking nut will not interfere with the kiln door during the opening and closing of the kiln door, and that workers do not need to continuously lift the hinge bolt and locking nut.
[0013] Preferably, the hinge bolt suspension device includes a support cantilever 2 fixed on the kiln body above the kiln opening, and a locking nut gripping device is provided at the end of the support cantilever.
[0014] Preferably, the hinge bolt gripping device is a permanent magnet 3 fixed to the end of the support cantilever, and the locking nut is a ferromagnetic metal nut.
[0015] like Figure 2 As shown, during the opening of the kiln door, after loosening the locking nut with a long-handled wrench, push the locking nut up to the permanent magnet. The magnetic force of the permanent magnet will attract and fix the locking nut, keeping the locking nut and the hinge bolt in a position that does not interfere with the opening and closing of the kiln door. When it is necessary to lock the kiln door, pull the locking nut down with a long-handled wrench to disengage it from the permanent magnet and let it fall into the U-shaped notch of the clamping plate. Then, tighten the locking nut with a long-handled wrench to lock the kiln door.
[0016] Preferably, such as Figure 3As shown, a locking sleeve 9 is also fitted onto the hinge bolt, sliding axially along the hinge bolt along with the locking nut. A thrust bearing 8 is installed between the locking sleeve and the locking nut, and the locking sleeve, locking nut, and thrust bearing are arranged coaxially. A bearing housing 10 for mounting the thrust bearing is provided near the locking sleeve end of the locking nut. The bearing housing is integrally connected to the locking nut, and the locking sleeve is inserted into the bearing housing. A radial limiting screw 11 is installed on the tube wall of the bearing housing, and an annular groove 12 that mates with the radial limiting screw is provided on the outer tube wall of the locking sleeve.
[0017] Because a thrust bearing is installed between the locking sleeve and the locking nut, the locking nut does not directly contact the clamping plate during the tightening process. Instead, the kiln door is locked by the cooperation of the locking sleeve and the clamping plate. The thrust bearing ensures that turning the locking nut does not cause the locking sleeve to rotate with it. The locking sleeve does not generate frictional resistance with the clamping plate due to rotation, so the operating resistance of the locking nut is small, resulting in a stronger locking force and a better sealing effect for the kiln door.
[0018] like Figure 4 As shown, the locking nut gripping device is an elastic buckle 18 fixed to the end of the support cantilever, which can grip and fix the locking nut or the hinge bolt rod.
[0019] The locking device for the upper edge of the kiln door of the wood heat treatment kiln of this utility model can overcome the disadvantages of the locking nut and hinge bolt affecting the opening and closing of the kiln door and posing safety hazards when using a horizontal locking shaft.
Claims
1. A locking device for the upper edge of the kiln door of a wood heat treatment kiln, comprising a locking shaft seat fixed above the kiln opening, a horizontal locking shaft parallel to the end face of the kiln opening mounted on the locking shaft seat, a hinged bolt rotatable around the horizontal locking shaft mounted on the horizontal locking shaft, and a locking nut threadedly engaged with the hinged bolt mounted on the hinged bolt, characterized in that: A locking plate that mates with a locking nut is fixed to the upper edge of the kiln door. A U-shaped notch is provided on the upper edge of the locking plate to allow the swivel bolt rod to pass through the plate. A swivel bolt suspension device is also fixed on the kiln body above the horizontal locking shaft to allow the swivel bolt to suspend above the kiln door after it comes out of the U-shaped notch. The swivel bolt suspension device includes a support cantilever fixed to the kiln body above the kiln opening, and a locking nut gripping device is provided at the end of the support cantilever.
2. The locking device for the upper edge of the kiln door of the wood heat treatment kiln according to claim 1, characterized in that: The hinge bolt gripping device is a permanent magnet fixed to the end of the support cantilever, and the locking nut is a ferromagnetic metal nut.
3. The locking device for the upper edge of the kiln door of the wood heat treatment kiln according to claim 1, characterized in that: The locking nut gripping device is an elastic buckle fixed to the end of the support cantilever that can grip the locking nut.
4. The upper edge locking device for the kiln door of the wood heat treatment kiln according to any one of claims 1 to 3, characterized in that: A locking sleeve is also fitted on the hinge bolt, which slides along the axial direction of the hinge bolt together with the locking nut. A thrust bearing is installed between the locking sleeve and the locking nut.
5. The locking device for the upper edge of the kiln door of the wood heat treatment kiln according to claim 4, characterized in that: A bearing housing for mounting a thrust bearing is provided near the end of the locking nut and the locking sleeve, and the locking sleeve is inserted into the bearing housing.
6. The locking device for the upper edge of the kiln door of the wood heat treatment kiln according to claim 5, characterized in that: The bearing housing sleeve is fitted with a radial limiting screw on its tube wall, and the outer tube wall of the locking sleeve is provided with an annular groove that mates with the radial limiting screw.