Internal and external double-sealing zero-leakage plugboard type isolation door
Through the internal and external double sealing structure and transmission device, the problem of lax sealing and leakage caused by dust accumulation in the isolation door is solved, and zero leakage of smoke and extended service life are achieved.
Patent Information
- Application Number
- CN202421518486.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-30
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-06-30
AI Technical Summary
The existing isolation doors are not tightly sealed and leaked due to dust accumulation after long-term use, and have a short service life and high cost.
It adopts a double seal structure inside and outside, including high temperature and corrosion-resistant inner seal and outer seal. Combined with ash drop groove, a soot blowing mouth and transmission device, the door panel is switched through electric or pneumatic actuators, and dust is removed by using solenoid valves to ensure the sealing effect.
It achieves zero internal and external leakage of flue gas, extends the service life of the isolation door, and reduces production and maintenance costs.
Smart Images
Figure CN223204368U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of isolation doors, in particular to an internal and external double-sealed zero-leakage plug-in isolation door. Background Art
[0002] Plug-in isolation doors are commonly used to isolate flue gases in boiler flues in power plants, chemical plants, and heating plants. A transmission mechanism (electric or pneumatic) opens and closes the door panels to achieve both medium flow and isolation. The fully open and fully closed states of the isolation door are 100%. Electric isolation doors are important auxiliary equipment for boilers. Installed in thermal power plants, where the cold and hot air ducts of boilers need to be shut off and isolated, they address the problem of lax closure of other dampers, greatly facilitating switching and maintenance of boiler equipment.
[0003] At present, the isolation doors used in major power plants and power stations across the country are affected by dust accumulation after long-term use, resulting in problems such as poor sealing and serious leakage. In addition, the isolation doors on the current market have a short service life and high replacement costs. Utility Model Content
[0004] In order to solve the defects of the prior art, the utility model provides an internal and external double-sealed zero-leakage plug-in isolation door.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an internal and external double-sealed zero-leakage plug-in isolation door, comprising a door frame, a sealing plate and a plug-in door panel; the sealing plate is fixed on both sides of the door frame; door interfaces fixedly connected to the flue are provided on both sides of the door frame; the plug-in door panel is inserted into the chamber formed by the sealing plate and the door frame; an ash trough is provided at the bottom of the door frame, ash blowing ports are provided at both ends of the ash trough, and a sewage outlet is provided at the bottom end of the ash trough; a circle of inner sealing parts made of high-temperature resistant and corrosion-resistant materials is installed on the inner side of the door frame near the four sides of the plug-in door panel; and high-temperature resistant and corrosion-resistant materials are installed at the corresponding parts of the door interface and the outer periphery of the plug-in door panel. The outer seal is made of material; the plug-in door panel includes a door panel, a transmission device and a locking device; the transmission device includes an electric actuator or a pneumatic actuator, a screw rod, a nut and a pull rod; the electric actuator or the pneumatic actuator is fixed to the top or side of the door frame; the screw rod and the nut are engaged with each other; one end of the screw rod is fixedly connected to the electric actuator or the pneumatic actuator, and the other end is connected to the pull rod through the nut; the pull rod is fixedly connected to the door panel; the locking device includes a triangular block and a roller; the triangular block is welded and fixed at the four corners of the door panel; the roller is hinged at the corresponding positions of the door frame and the triangular block; the electric actuator or the pneumatic actuator is electrically connected to the electrical control box of the isolation door.
[0006] After adopting this solution, the problem of loose closing caused by dust falling from the door frame is solved through the design of the dust droplet groove; the problem of loose sealing and serious leakage is solved through the double sealing cooperation of the inner seal and the outer seal.
[0007] As a further improvement, a packing groove is provided on the inside of the door frame. The outer seal is secured in this groove with stainless steel screws and is made of ceramic fiber packing. The packing groove design serves to repeatedly secure the seal, while the use of ceramic fiber packing ensures a good seal while also reducing production costs.
[0008] A further improvement is the outer seal, made of fluororubber or silicone rubber, consisting of an integrally formed hollow sealing portion and a plate-like connecting portion. A steel plate is pressed against the plate-like connecting portion and secured to the inside of the door joint with screws. The hollow sealing portion provides some cushioning when the door is closed. After closing, the material's inherent properties allow it to expand and return to its original position, further enhancing the sealing effect. The use of a steel plate for press-fitting provides enhanced security.
[0009] As a further improvement, a nozzle controlled by a solenoid valve is provided at the soot blowing port; the solenoid valve is electrically connected to the electric control box. With the help of the solenoid valve, high-pressure gas or high-pressure liquid can be sprayed through the nozzle to clean the dust as needed.
[0010] As a further improvement, guide rails fixed to the door frame and guide rollers fixed to the door panel are provided on both sides of the screw rod. The design of the guide rails and guide rollers plays a role in assisting the opening and closing of the door. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a front view of a zero-leakage plug-in isolation door with double internal and external seals.
[0012] Figure 2 It is a side view of a zero-leakage plug-in isolation door with double internal and external seals.
[0013] Figure 3 This is the installation diagram of the internal and external double-sealed zero-leakage plug-in isolation door.
[0014] Figure 4 It is a cross-sectional view of the door panel and door frame when they are matched.
[0015] Figure 5 This is a schematic diagram of the installation of the internal seal.
[0016] Figure 6 is a perspective view of the outer seal.
[0017] Figure 7 This is a schematic diagram of the installation of the outer seal. DETAILED DESCRIPTION
[0018] The preferred embodiments of the present invention are further described in detail below with reference to the accompanying drawings.
[0019] like Figures 1 to 7As shown, a zero-leakage plug-in isolation door with double internal and external seals includes a door frame 1, a sealing plate 2, and a plug-in door panel 3; the sealing plate is fixed on both sides of the door frame; door interfaces fixedly connected to the flue are provided on both sides of the door frame; in case of corrosive flue gas media, the sealing plate is made of stainless steel as a whole, and the sealing plate is reinforced. The plug-in door panel is inserted into the chamber formed by the sealing plate and the door frame; a partition is provided on the door frame to separate the plug-in door panels. An ash trough 4 is provided at the bottom of the door frame, ash blowing ports 5 are provided at both ends of the ash trough, and a sewage outlet 6 is provided at the bottom of the ash trough; a nozzle controlled by a solenoid valve is provided at the solenoid valve; and the solenoid valve is electrically connected to the electric control box.
[0020] An inner seal 7 made of high-temperature and corrosion-resistant material is installed on the inside of the door frame near the perimeter of the insert-type door panel. An outer seal 8, also made of high-temperature and corrosion-resistant material, is installed around the perimeter of the door interface and the outer perimeter of the insert-type door panel. A packing groove 16 is provided on the inside of the door frame, into which the outer seal is secured with stainless steel screws. The outer seal is made of ceramic fiber packing and is made of fluororubber or silicone rubber. The outer seal comprises an integrally molded hollow sealing portion 17 and a plate-like connecting portion 18. The outer seal is pressed against the plate-like connecting portion by a steel plate 19 and secured to the door interface with screws 20. When the door panel is fully closed, the outer seal is firmly in contact with the door panel. A dual seal is employed: one for tight contact between the door frame and the door panel, and another for tight contact between the frame and the outside when the door panel is fully closed. This dual seal provides guaranteed protection, ensuring zero smoke leakage.
[0021] The insert-type door panel includes a door panel 9, a transmission mechanism, and a locking device. The door panel is a hollow, double-clad structure with a central reinforcement of square tubes or I-beams, and internal reinforcement at the locking points. It will not deform for years, and while lightweight, it also offers increased strength and toughness. The transmission mechanism includes an electric or pneumatic actuator 10, a screw 11, a nut 12, and a tie rod 13. The electric or pneumatic actuator is secured to the top or side of the door frame via a bracket, allowing for both vertical and horizontal door panel installation. The screw and nut mesh with each other; one end of the screw is fixedly connected to the electric or pneumatic actuator, and the other end is connected to the tie rod via a nut. The tie rod is fixedly connected to the door panel. On either side of the screw are guide rails secured to the door frame and guide rollers secured to the door panel.
[0022] The locking device includes a triangular block 14 and a roller 15; the triangular block is welded and fixed at the four corners of the door panel; the roller is hinged to the door frame at the corresponding position of the triangular block; the electric actuator or pneumatic actuator is electrically connected to the electric control box of the isolation door.
[0023] In order to better illustrate the technical solution of the present application, the use of the internal and external double-sealed zero-leakage plug-in isolation door is further explained.
[0024] In this application, the electric control box only plays a basic control role and is not within the scope of protection of this application. The isolation door is fixedly connected to the flue through the door interface and is installed on the flue as a whole. The electric actuator or pneumatic actuator is controlled by the electric control box to start working. The electric actuator or pneumatic actuator drives the screw to rotate, thereby realizing the opening or closing of the door panel relative to the door frame. When the door panel is closed to 100%, the door is locked by the cooperation of the triangular block and the roller. At this time, the electric actuator or pneumatic actuator displays 100%, that is, it is closed. It is simple and easy for the operator to understand, and can directly and clearly see the status indication of the door panel being closed. Zero leakage of smoke inside and outside is achieved through the seal at the contact between the door panel and the door frame. With the double sealing structure, the installation of the isolation door no longer needs to consider the installation direction of the interface and the smoke.
[0025] The above-mentioned embodiment is only a preferred embodiment of the present invention, but the present invention is not limited by the above-mentioned embodiment. Any other changes, modifications, replacements, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and fall within the scope of protection of the present invention.
Claims
1. A zero-leakage plug-in type isolation door with internal and external double sealing, comprising a door frame (1), a sealing plate (2) and a plug-in type door panel (3); the sealing plate is fixed on both sides of the door frame; both sides of the door frame are provided with door interfaces fixedly connected to the flue; the characteristics are: The plug-in door panel is inserted into a cavity formed by a sealing plate and a door frame; a dust drop groove (4) is provided at the bottom of the door frame, dust blowing ports (5) are provided at both ends of the dust drop groove, and a sewage outlet (6) is provided at the bottom end of the dust drop groove; an inner sealing member (7) made of a high-temperature resistant and corrosion-resistant material is installed on the inner side of the door frame near the periphery of the plug-in door panel; an outer sealing member (8) made of a high-temperature resistant and corrosion-resistant material is installed at the corresponding periphery of the door interface and the outer periphery of the plug-in door panel; the plug-in door panel includes a door panel (9), a transmission device and a locking device; the transmission device includes an electric actuator or a pneumatic actuator (10), a screw rod (11), a nut (12) and a pull rod (13); the electric actuator or the pneumatic actuator is fixed to the top or side of the door frame; the screw rod and the nut are engaged with each other; one end of the screw rod is fixedly connected to the electric actuator or the pneumatic actuator, and the other end is connected to the pull rod through the nut; the pull rod is fixedly connected to the door panel; the locking device includes a triangular block (14) and a roller (15); the triangular block is welded and fixed at the four corners of the door panel; the roller is hinged at the position corresponding to the door frame and the triangular block; the electric actuator or the pneumatic actuator is electrically connected to the electric control box of the isolation door.
2. The zero-leakage plug-in isolation door with internal and external double seals according to claim 1 is characterized in that: A packing groove (16) is provided on the inner side of the door frame; an inner sealing member is fixed in the packing groove by means of stainless steel screws; and the inner sealing member is made of ceramic fiber packing.
3. The zero-leakage plug-in isolation door with internal and external double seals according to claim 1 is characterized in that: The outer seal is made of fluororubber or silicone rubber; the outer seal comprises an integrally formed hollow sealing portion (17) and a plate-shaped connecting portion (18); the outer seal is pressed against the plate-shaped connecting portion by a steel plate (19) and fixed to the door interface by screws (20).
4. The zero-leakage plug-in isolation door with internal and external double seals according to claim 1 is characterized in that: A nozzle controlled by a solenoid valve is provided at the soot blowing port; The solenoid valve is electrically connected to the electric control box.
5. The zero-leakage plug-in isolation door with internal and external double seals according to claim 1 is characterized in that: Guide rails fixed on the door frame and guide rollers fixed on the door panel are respectively provided on both sides of the screw rod.