Double-plugboard isolation door of coal mill
By introducing a transmission and locking mechanism and a sealing air system into the double-slot isolation door of the coal mill, the problems of long closing time and high leakage rate were solved, achieving rapid closing and zero leakage, and improving the sealing effect and service life.
Patent Information
- Application Number
- CN202423056255.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The existing double-plate isolation door for coal mills has problems such as long closing time, incomplete closure, and high leakage rate.
A double-plate isolation door for a coal mill, comprising a door frame, an isolation door panel, a transmission and locking mechanism, and an electric or pneumatic actuator, is designed. The door panel is quickly closed and tightly locked through synchronous transmission and locking mechanism, and the sealing effect is improved by using sealing air and sweeping air.
It achieves rapid closure and zero leakage of the isolation door panel, extends its service life, and reduces maintenance costs.
Smart Images
Figure CN223669352U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to double-inserting-plate insulation door especially designs a coal mill double-inserting-plate insulation door. BACKGROUND
[0002] Double-inserting-plate insulation door is an important auxiliary equipment of boiler, is widely installed on the cold and hot air duct of boiler of thermal power plant, chemical plant and other places needing to shut off and insulate. Coal mill is a machine that breaks and grinds coal into coal powder, and it is an important auxiliary equipment of coal powder furnace. The double-inserting-plate insulation door of coal mill on the market currently comprises a door frame and two insulation door plates installed in the door frame; the two insulation door plates correspond to the insulation door interfaces on the two sides respectively; the insulation door interfaces on the two sides are connected with the inlet air duct sealingly and fixedly. The applicant found that ordinary double-inserting-plate insulation doors of coal mill on the market have the problems of long closing time, poor closing, large leakage rate and the like during production and maintenance. How to solve the problems existing in the prior art is the subject that the applicant of the case is committed to researching and solving. CONTENT OF THE UTILITY MODEL
[0003] In order to solve the defects existing in the prior art, the utility model provides a double-inserting-plate insulation door of coal mill.
[0004] In order to achieve the above-mentioned purpose, the specific technical scheme is as follows: a double-inserting-plate insulation door of coal mill comprises a door frame and two insulation door plates installed in the door frame; the two insulation door plates correspond to the insulation door interfaces on the two sides respectively; a sealing cavity is formed between the two insulation door plates; a synchronous transmission and locking mechanism is installed in the sealing cavity; the transmission and locking mechanism is used for opening and closing the two insulation door plates and is used for pressing and sealing the two insulation door plates with the insulation door interfaces on the two sides respectively; an inlet for sealing air and purging air is arranged on the door frame and is communicated with the air opening of the sealing cavity; an electric actuator or a pneumatic actuator is installed on the door frame; the transmission shaft of the electric actuator or the pneumatic actuator is connected with the transmission and locking mechanism through a connecting plate.
[0005] After the scheme is adopted, the opening and closing of the door and the locking can be completed synchronously with the help of the connecting plate, the door closing time is shortened, the closing of the insulation door plates is ensured to be more airtight by the self-locking after transmission and the double locking after locking, and zero leakage is realized. When the door is closed, the sealing air is injected into the sealing cavity through the inlet, a sealing air curtain is formed between the insulation door plates, and the sealing effect is improved. The problem of accumulated dust jamming caused by long-time use can be solved by injecting purging air through the inlet. The service life of the product is greatly increased, and the use cost is reduced.
[0006] Further improvement, the transmission mechanism comprises two locking push rods, a front locking mechanism and a rear locking mechanism; the two locking push rods are respectively fixed at the upper and lower ends of the connecting plate; the connecting plate is made of square steel; the front locking mechanism comprises four connecting seats and four hinged plates; one of the connecting seats is fixed between the locking push rod and the connecting plate; two connecting seats are respectively fixed at the front ends of the two insulation door plates; another connecting seat is provided with an internal thread, and the front end of the locking push rod is provided with a section of external thread matched with the connecting seat; the connecting seat and the locking push rod are fixedly connected through the cooperation of the internal and external threads; the four hinged plates are respectively hinged to the four connecting seats; the rear locking mechanism comprises three connecting seats and two hinged plates; two connecting seats are respectively fixed at the rear ends of the two insulation door plates; another connecting seat is provided with an internal thread, and the rear end of the locking push rod is provided with a section of external thread matched with the connecting seat; the connecting seat and the locking push rod are fixedly connected through the cooperation of the internal and external threads; the two hinged plates are respectively hinged to the three connecting seats; the two locking push rods are respectively provided with the front locking mechanism and the rear locking mechanism. After adopting the scheme, each insulation door plate is provided with upper and lower locking push rods, and the locking structure is respectively arranged at the front and rear. The structure guarantees the strength while increasing the coordination and synchronization of movement. By adjusting the relative positions of the two connecting seats arranged at the front and rear ends of the locking push rod, the purpose of fine adjustment of the insulation door plate and the interfaces of the insulation doors on both sides is achieved, and the sealing effect is guaranteed. When the electric actuator or pneumatic actuator continuously pushes the transmission shaft forward, the transmission shaft and the connecting plate are fixedly connected, and then the connecting plate is pushed forward. The pushing of the connecting plate will cause the relative angle between the hinged plate and the connecting seat to increase, so that the door plate moves to both sides and is pressed to the sealing surface, finally achieving the sealing effect. When the door plate is closed to 100%, the electric actuator or pneumatic actuator stops working, so that the inside and outside of the insulation door realize zero leakage.
[0007] Further improvement, the insulation door plate is made of 12Cr1 Mov alloy steel with high temperature and high pressure resistance through double-sided cladding hollow rib sealing. It is guaranteed that it will not deform under high temperature and high pressure.
[0008] Further improvement, the lower side of each insulation door plate is provided with two rollers for opening and closing of the insulation door plate. The rollers are sealed in the insulation door plate, preventing the influence of dust accumulation, having a longer service life, and the rollers enable the insulation door plates to independently walk on their own tracks, assisting the smooth opening and closing of the door.
[0009] Further improvement, the upper and lower sides of the insulation door plate are provided with two groups of positioning pulleys, which are used to assist the opening and closing movement of the insulation door plate and assist locking when closing in place. The positioning pulleys and the rollers cooperate with each other, making the opening and closing of the door plate more flexible and playing a role in assisting locking.
[0010] Further improvement, the isolation door plate is provided with two groups of contact rollers for radial movement of the isolation door plate at the edge of the end close to the isolation door interface. The contact rollers enable the isolation door plate to be locked by radial movement to both sides when closing.
[0011] Further improvement, the door frame is further provided with an inspection window. The design of the inspection window facilitates maintenance. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 is a front view of the double-insert plate isolation door of the coal mill.
[0013] Fig. 2 is a top view of the double-insert plate isolation door of the coal mill.
[0014] Fig. 3 is a reference diagram of the transmission and locking mechanism.
[0015] Fig. 4 is a reference diagram of the single-piece isolation door plate. DETAILED DESCRIPTION
[0016] The preferred scheme of the present application will be further described below in combination with the drawings.
[0017] As shown in Figs. 1 to 4 , a double-insert plate isolation door of a coal mill comprises a door frame 1 and two isolation door plates 2 installed in the door frame; the door frame is further provided with an inspection window 15. The two isolation door plates correspond to the isolation door interfaces 3 respectively; a sealed chamber 4 is formed between the two isolation door plates; a synchronous transmission and locking mechanism is installed in the sealed chamber; the transmission and locking mechanism is used for opening and closing the two isolation door plates and for pressing and sealing the two isolation door plates with the isolation door interfaces on both sides respectively; the door frame is provided with an inlet 5 for sealed air and purging air communicated with the air outlet of the sealed chamber; the inlet is arranged on the side edge of the door frame close to the bottom.
[0018] The door frame is provided with an electric or pneumatic actuator 6; the present application is described by taking the pneumatic actuator as an example. The transmission shaft 7 of the pneumatic actuator is connected with the transmission mechanism and the locking mechanism through the connecting plate 8. The transmission mechanism comprises two locking push rods 9, a front locking mechanism and a rear locking mechanism; the two locking push rods are fixed at the upper and lower ends of the connecting plate; the connecting plate is made of square steel; the front locking mechanism comprises four connecting seats 10 and four hinge plates 11; one of the connecting seats is fixed between the locking push rod and the connecting plate; two of the connecting seats are fixed at the front ends of the two door plates; the other connecting seat is provided with an internal thread, and the front end of the locking push rod is provided with an external thread matched with the connecting seat; the four hinge plates are hingedly connected to the four connecting seats; the rear locking mechanism comprises three connecting seats and two hinge plates; two of the connecting seats are fixed at the rear ends of the two door plates; the other connecting seat is provided with an internal thread, and the rear end of the locking push rod is provided with an external thread matched with the connecting seat; the two hinge plates are hingedly connected to the three connecting seats; the two locking push rods are provided with the front locking mechanism and the rear locking mechanism. The door plate is made of 12Cr1 Mov alloy steel with high temperature and high pressure resistance and is made by double-sided cladding hollow rib sealing. The lower side of each door plate is provided with two rollers 12 for opening and closing the door plate. The upper and lower sides of the door plate are provided with two sets of positioning pulleys 13, which are used to assist the opening and closing movement of the door plate and to assist locking when closing in place. The door plate is provided with two sets of contact rollers 14 for radial movement of the door plate at the edge of one end close to the door interface.
[0019] In order to better illustrate the technical scheme of the present application, the working principle of the double-insert plate isolation door of the coal mill will be further described.
[0020] The pneumatic actuator is operated by connecting the electrical control cabinet of the DCS automatic control system, and the control cabinet electromagnetic valve gives an opening signal when an opening signal is given. The transmission shaft of the pneumatic actuator is connected to the connecting plate, the connecting plate is connected to the two locking push rods, and the locking push rods are divided into upper and lower two parts. The two door plates are pushed to the two sides and are pressed on the sealing surface. The whole action is completed synchronously and automatically. The hinge plates of the transmission and locking mechanisms automatically press the door plates to realize zero leakage. The door plate is designed to be flexible in opening and closing, resistant to high temperature and high pressure, high in structural strength, and not easy to deform. At the same time, the inlet is blown with sweeping wind to reduce the phenomenon of dust accumulation, reduce the failure rate, and reduce the maintenance cost and labor intensity of the maintenance personnel.
[0021] The above embodiment is only a preferred mode of the present application, but the present embodiment is not limited by the above embodiment, and any change, modification, replacement, combination, simplification, etc. made without departing from the spirit and principle of the present application should be an equivalent replacement mode, and all fall within the protection scope of the present application.
Claims
1. A double-plate isolation door for a coal mill, comprising a door frame (1) and two isolation door plates (2) installed within the door frame; the two isolation door plates correspond to isolation door interfaces (3) on both sides respectively; characterized in that: A sealed chamber (4) is formed between the two isolation door panels; a synchronous transmission and locking mechanism is installed in the sealed chamber; the transmission and locking mechanism is used to open and close the two isolation door panels and to press and seal the two isolation door panels with the isolation door interfaces on both sides respectively; the door frame is provided with an inlet (5) for sealing air and blowing air that are connected to the sealed chamber; an electric actuator or pneumatic actuator (6) is installed on the door frame; the transmission shaft (7) of the electric actuator or pneumatic actuator is connected to the transmission and locking mechanism through a connecting plate (8); the transmission and locking mechanism includes two locking push rods (9), a front locking mechanism and a rear locking mechanism; the two locking push rods are fixed at the upper and lower ends of the connecting plate respectively; the connecting plate is made of square steel; the front locking mechanism includes four connecting seats (10) and four hinge plates ( 11) One connecting seat is fixed between the locking push rod and the connecting plate; two connecting seats are respectively fixed to the front ends of the two partition door panels; another connecting seat is provided with an internal thread, and the front end of the locking push rod is provided with an external thread that mates with the connecting seat. The connecting seat and the locking push rod are fixedly connected by the mating of the internal and external threads; four hinge plates are respectively hinged to the four connecting seats; the rear locking mechanism includes three connecting seats and two hinge plates; two connecting seats are respectively fixed to the rear ends of the two partition door panels; another connecting seat is provided with an internal thread, and the rear end of the locking push rod is provided with an external thread that mates with the connecting seat. The connecting seat and the locking push rod are fixedly connected by the mating of the internal and external threads; two hinge plates are respectively hinged to the three connecting seats; both locking push rods are provided with a front locking mechanism and a rear locking mechanism.
2. The double-plate isolation door for a coal mill according to claim 1, characterized in that: The isolation door panel is made of high-temperature and high-pressure resistant 12Cr1Mov alloy steel through double-sided hollow reinforcement and sealing.
3. The double-plate isolation door for a coal mill according to claim 1, characterized in that: Each partition door panel has two rollers (12) at its bottom for opening and closing.
4. The double-plate isolation door for a coal mill according to claim 1, characterized in that: The upper and lower sides of the isolation door panel are equipped with two sets of positioning pulleys (13). The positioning pulleys are used to assist the opening and closing movement of the isolation door panel and to assist in locking when it is closed.
5. The double-plate isolation door for a coal mill according to claim 1, characterized in that: The isolation door panel has two sets of contact rollers (14) on one end edge near the isolation door interface for radial movement of the isolation door panel.
6. The double-plate isolation door for a coal mill according to any one of claims 1 to 5, characterized in that: The door frame is also equipped with an inspection window (15).