Turnover plate mechanism of preheater

Abstract

The utility model relates to the technical field of preheater flap valves, and provides a preheater flap mechanism which comprises a valve body, a motor is arranged on the outer wall of the valve body, the output end of the motor is connected with a shaft rod, the shaft rod penetrates through the valve body, a connecting plate is arranged in the valve body, the shaft rod is fixedly sleeved with the connecting plate, valve plates are arranged on the two sides of the connecting plate respectively, and open grooves are formed in the two sides of the connecting plate. A positioning rod is arranged in the open groove and penetrates through the valve plate, the top end of the positioning rod is sleeved with an abutting sleeve, a connecting block is arranged in the abutting sleeve and is in threaded connection with the positioning rod, a mounting groove is formed in the side, away from the connecting plate, of the valve plate, and a sealing gasket is arranged in the mounting groove. A motor driving mode is adopted, the motor drives the shaft rod to rotate, the shaft rod drives the connecting plate to move synchronously, the connecting plate drives the valve plate to move in the valve body to achieve material guiding, after the positioning rod penetrates through the valve plate, the connecting block is screwed to the positioning rod, the valve plate can be installed, and the valve plate can be conveniently detached by screwing the connecting block away from the positioning rod.

Description

Technical Field

[0001] The present application relates to the technical field of preheater flap valves, and more specifically, to a preheater flap mechanism. Background Art

[0002] A preheater is a heating surface that uses the flue gas in the tail flue of a boiler to preheat the air before entering the boiler to a certain temperature through internal fins, which is used to improve the heat exchange performance of the boiler and reduce energy consumption. It is generally abbreviated as an air preheater and is mostly used in coal-fired boilers. After the preheater is used, feeding is required, and a flap valve mechanism needs to be installed during use. The flap valve mechanism is a type of fixed flap used as a moving clamping plate, placed at a right angle on the pipeline, and the on-off of the fluid is controlled by the movement of the flap.

[0003] However, currently, most of the existing flap valve mechanisms are manually operated by workers, which is rather cumbersome, and the internal valve plate is inconvenient to disassemble and assemble, resulting in the gasket being difficult to replace. The long-term use of the gasket will lead to a decline in the sealing effect. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a preheater flap mechanism, which adopts a motor-driven method to replace manual labor and is convenient for disassembling and assembling the valve plate at the same time.

[0005] The embodiments of the present application provide a preheater flap mechanism, which adopts the following technical solutions:

[0006] A preheater flap mechanism includes a valve body, a motor is arranged on the outer wall of the valve body, the output end of the motor is connected with a shaft rod, the shaft rod passes through the valve body, a connecting plate is arranged inside the valve body, the connecting plate is fixedly sleeved on the shaft rod, valve plates are respectively arranged on both sides of the connecting plate, slots are arranged on both sides of the connecting plate, a plurality of positioning rods are arranged in the slots, the positioning rods pass through the valve plates, a pressing sleeve is sleeved on the top end of the positioning rod, a connecting block is arranged inside the pressing sleeve, the connecting block has internal threads, the positioning rod has external threads, and the connecting block is threadedly connected with the positioning rod. An installation groove is arranged on the side of the valve plate away from the connecting plate, a gasket is arranged in the installation groove, a plurality of locking screws are arranged on the valve plate, the locking screws pass through the gasket, and nuts are arranged on the locking screws.

[0007] Preferably, a maintenance door is arranged on the valve body, and the maintenance door is hinged to the valve body through a plurality of spring hinges.

[0008] Preferably, one end of the shaft rod away from the motor extends to the outside of the valve body, an installation frame is arranged on the outer wall of the valve body, a pedestal bearing is arranged in the installation frame, and the shaft rod is connected to the pedestal bearing.

[0009] Preferably, a knob is provided at one end of the pressing sleeve away from the connecting plate.

[0010] Preferably, anti-slip lines are provided on the knob.

[0011] Preferably, anti-slip lines are provided at one end of the pressing sleeve close to the connecting plate.

[0012] Preferably, the motor is a servo motor.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows:

[0014] The present application adopts a motor-driven method, replacing manual labor and reducing labor costs. By driving the shaft rod to rotate with the motor, the shaft rod drives the connecting plate to move synchronously, and the connecting plate drives the valve plate to move in the valve body to achieve material guiding. After the positioning rod passes through the valve plate, the connecting block is screwed onto the positioning rod to install the valve plate, and the connecting block is unscrewed from the positioning rod to facilitate the disassembly of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 Structural schematic diagram of some embodiments of the present utility model;

[0017] Figure 2 Structural schematic diagram of the connection between the connecting plate and the valve plate in some embodiments of the present utility model;

[0018] Figure 3 Structural schematic diagram of the locking screw in some embodiments of the present utility model;

[0019] Figure 4 Structural schematic diagram of the maintenance door in some embodiments of the present utility model.

[0020] Reference numerals are respectively:

[0021] 1, valve body; 2, motor; 3, shaft rod; 4, connecting plate; 5, valve plate; 6, slotted groove; 7, positioning rod; 8, pressing sleeve; 9, connecting block; 10, sealing gasket; 11, installation groove; 12, locking screw; 13, nut; 14, maintenance door; 15, spring hinge; 16, installation frame; 17, pedestal bearing; 18, knob. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0024] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0026] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0028] Embodiment

[0029] Such asFigures 1-4 As shown in the figure, the preheater flap mechanism described in the embodiment of the present application includes a valve body 1. A motor 2 is provided on the outer wall of the valve body 1. The output end of the motor 2 is connected to a shaft rod 3. The shaft rod 3 passes through the valve body 1. A connecting plate 4 is provided inside the valve body 1. The connecting plate 4 is fixedly sleeved on the shaft rod 3. Valve plates 5 are respectively provided on both sides of the connecting plate 4. Slots 6 are provided on both sides of the connecting plate 4. A plurality of positioning rods 7 are provided in the slots 6. The positioning rods 7 pass through the valve plates 5. A pressing sleeve 8 is sleeved on the top end of the positioning rod 7. A connecting block 9 is provided inside the pressing sleeve 8. The connecting block 9 has internal threads, and the positioning rod 7 has external threads. The connecting block 9 is threadedly connected to the positioning rod 7. When in use, the shaft rod 3 is driven to rotate by the motor 2. The shaft rod 3 drives the connecting plate 4 to move synchronously. The connecting plate 4 drives the valve plates 5 to move inside the valve body 1 to achieve material guiding. After the positioning rods 7 pass through the valve plates 5, the connecting block 9 is screwed onto the positioning rod 7, and the installation of the valve plates 5 can be realized. Unscrewing the connecting block 9 from the positioning rod 7 facilitates the disassembly of the valve plates 5.

[0030] An installation groove 11 is provided on the side of the valve plate 5 away from the connecting plate 4. A sealing gasket 10 is provided in the installation groove 11. A plurality of locking screws 12 are provided on the valve plate 5. The locking screws 12 pass through the sealing gasket 10. Nuts 13 are provided on the locking screws 12. When in use, first pass the locking screws 12 through the sealing gasket 10, and then install the nuts 13 on the locking screws 12, and the installation of the sealing gasket 10 can be realized. Removing the nuts 13 facilitates the removal of the sealing gasket 10 for replacement.

[0031] In this embodiment, a maintenance door 14 is provided on the valve body 1. The maintenance door 14 and the valve body 1 are hingedly provided through a plurality of spring hinges 15. By providing the maintenance door 14, it is convenient to operate the inside of the valve body 1.

[0032] In this embodiment, the end of the shaft rod 3 away from the motor 2 extends to the outside of the valve body 1. An installation frame 16 is provided on the outer wall of the valve body 1. A pedestal bearing 17 is provided in the installation frame 16. The shaft rod 3 is connected to the pedestal bearing 17. The pedestal bearing 17 supports the shaft rod 3 during rotation, improving the stability of the shaft rod 3.

[0033] In this embodiment, a knob 18 is provided at the end of the pressing sleeve 8 away from the connecting plate 4. By providing the knob 18, it is convenient to rotate the pressing sleeve 8.

[0034] In this embodiment, anti-slip lines are provided on the knob 18. By providing the anti-slip lines, the friction force can be increased, facilitating the rotation of the knob 18.

[0035] In this embodiment, anti-slip lines are provided at the end of the pressing sleeve 8 close to the connecting plate 4. By providing the anti-slip lines, the stability of the pressing sleeve 8 when pressing against the valve plate 5 is improved.

[0036] In this embodiment, the motor 2 is a servo motor, which can control the speed accurately and has high position accuracy.

[0037] The working principle of a flap mechanism of a preheater according to an embodiment of the present application:

[0038] The motor 2 drives the shaft rod 3 to rotate, the shaft rod 3 drives the connecting plate 4 to move synchronously, and the connecting plate 4 drives the valve plate 5 to move in the valve body 1 to achieve material guiding. After the positioning rod 7 passes through the valve plate 5, the connecting block 9 is screwed onto the positioning rod 7, and the installation of the valve plate 5 can be realized. Unscrewing the connecting block 9 from the positioning rod 7 facilitates the disassembly of the valve plate 5. First, the locking screw 12 is passed through the sealing gasket 10, and then the nut 13 is installed on the locking screw 12, and the installation of the sealing gasket 10 can be completed. Removing the nut 13 facilitates the removal of the sealing gasket 10 for replacement.

[0039] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A preheater flap mechanism, characterized in that: The cam is provided with a plurality of locking screws, the locking screws are provided with a plurality of locking screws, the plurality of ...

2. A preheater flap mechanism according to claim 1, characterized in that: The valve body is provided with a maintenance door, and the maintenance door is hinged to the valve body through a plurality of spring hinges.

3. The preheater flap mechanism according to claim 1, characterized in that: One end of the shaft rod away from the motor extends to the outside of the valve body, a mounting frame is arranged on the outer wall of the valve body, a seat bearing is arranged in the mounting frame, and the shaft rod is connected to the seat bearing.

4. The preheater flap mechanism according to claim 1, characterized in that: A knob is arranged at one end of the pressing sleeve away from the connecting plate.

5. A preheater flap mechanism according to claim 4, characterized in that: The knob is provided with anti-slip grooves.

6. The preheater flap mechanism according to claim 1, characterized in that: An end of the pressing sleeve close to the connecting plate is provided with anti-slip grooves.

7. The preheater flap mechanism according to claim 1, characterized in that: The motor is a servo motor.

Images