A preheater weight flap valve

Abstract

The utility model discloses a preheater weight turns over flap valve, including flap valve body, valve plate, valve cover, limit switch, rotation axis, weight lever, inner extension board, iron core, helical coil, magnet. After unloading is completed, through the lever principle makes the valve plate realize the turnover reset, and utilizes the magnet and will valve plate strong adsorption in the material outlet place of push material bin when the first collision of valve plate and push material bin, therefore will not appear the phenomenon of valve plate collision jumpy, avoided because valve plate jumpy and caused the material of push material bin to fall unexpectedly, caused the material feeding amount deviation, reduced the probability that flap valve body and valve plate happened damage caused by the collision simultaneously, improved the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of control valves for feeding and unloading devices, specifically a preheater counterweight flap valve. Background Technology

[0002] The flap valve (also known as an airlock valve) is installed at an appropriate location between the feed pipe of the upper cyclone and the feed inlet of the heat exchange pipe at the outlet of the lower cyclone. It serves both to maintain uniform and unobstructed feeding and to provide a seal. When there is a large amount of material coming in, it can act as a buffer; when there is a small amount of material coming in, it can act as a seal to prevent air leakage inside the system.

[0003] Currently, most existing flap valves use a motor to control the valve plate to lock the ash material. However, such flap valves have certain limitations. They require electricity to operate, cannot meet the air-locking requirements in all locations, and require frequent manual maintenance and adjustment. A few flap valves use the material's own weight to lock the air and unload the material, but the air-locking rate of such flap valves cannot be controlled, thus making it impossible to control the ash material feeding frequency. Therefore, they cannot be adjusted for air-locking in a timely manner, causing inconvenience to users. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a preheater counterweight flap valve, the specific technical solution of which is as follows:

[0005] A preheater counterweight flap valve includes a flap valve body, a valve plate, a valve cover, a limit switch, a rotating shaft, a counterweight rod, an inner extension plate, an iron core, a spiral coil, and a magnet.

[0006] The flap valve body includes a storage bin, a cavity, and a discharge port. The material enters the storage bin of the flap valve body from the discharge pipe of the upper-level cyclone. After falling from the storage bin, it flows through the cavity and into the heat exchange pipe of the lower-level cyclone through the discharge port of the flap valve body.

[0007] The valve plate is installed inside the flap valve body and is rotatably connected to the flap valve body via a rotating shaft; a counterweight rod is fixedly connected to each end of the rotating shaft.

[0008] The inner extension plate is disposed on the inner wall of the flap valve body, and the iron core and the spiral coil are fixedly installed on the inner extension plate. The spiral coil is electrically connected to the limit switch.

[0009] The side wall of the storage silo is equipped with a slide rail, and the limit switch is slidably connected to the side wall of the storage silo. The limit switch is equipped with a socket, and the side wall of the slide rail is equipped with through holes. The position of the limit switch on the slide rail can be adjusted according to the actual working conditions to adjust the airlock unloading rate. The limit switch is positioned by inserting a pin through the through hole into the socket.

[0010] When material accumulates to the limit switch, the limit switch closes, energizing the spiral coil. At this time, one end of the iron core generates a magnetic force similar to that of the magnet. The magnet then separates from the iron core, causing the valve plate to flip and unload the material from the storage hopper. After the material is unloaded from the limit switch, the limit switch opens, de-energizing the spiral coil. The lever principle causes the valve plate to flip back to its original position. Upon the first collision with the storage hopper after the valve plate flips, the magnet firmly adheres to one end of the iron core, fixing the valve plate in place.

[0011] Furthermore, the counterweight rod includes a rod body and a counterweight block. In order to adapt to different material inflow and outflow requirements, multiple matching mounting holes are provided on the rod body and the counterweight block. The counterweight block is fixed to the rod body by bolts. In actual production, the number and position of the counterweight blocks can be adjusted according to the torque required by the actual working conditions.

[0012] Furthermore, in order to prevent safety hazards caused by excessive material adhering to the valve plate, the preheater counterweight flap valve of this utility model also includes an angle sensor and a vibrator. The angle sensor is fixedly installed on the rod of the preheater flap valve, and the vibrator is fixedly installed on the valve plate for monitoring the status of the preheater flap valve and handling faults.

[0013] By fixing an angle sensor to the valve stem of the preheater flapper, the swing data of the valve plate can be collected in real time. Based on the fluctuation curve generated by the swing frequency and swing angle of the valve plate, corresponding monitoring parameters can be set, warnings can be issued for abnormal fluctuations, and the vibrator can be automatically triggered to clean the material attached to the valve plate.

[0014] Furthermore, in order to improve the overall heat preservation and protection effect of the flap valve, the preheater counterweight flap valve of this utility model also includes a protective shell and heat insulation cotton. The protective shell is sleeved on the outside of the flap valve body, and the heat insulation cotton is installed between the flap valve body and the protective shell, and is in close contact with the flap valve body and the protective shell.

[0015] Furthermore, in order to prevent the valve plate from accidentally rotating and impacting the flap valve body due to the failure of the magnet or iron core, buffer rubber pads are provided on the outer side of the valve plate and the inner wall of the flap valve body; in order to prevent the wind from blowing in and to prevent dust from spreading, a sealing gasket is provided at the connection between the flap valve body and the valve cover.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] (1) After the preheater counterweight flap valve of this utility model is unloaded, the valve plate is flipped and reset by lever principle. When the valve plate collides with the push hopper for the first time, the valve plate is strongly attracted to the material outlet of the push hopper by magnet. Therefore, there will be no phenomenon of valve plate collision and jumping. This avoids the material in the push hopper from falling accidentally due to valve plate jumping, which will cause deviation in material feeding. At the same time, it reduces the probability of damage to the flap valve body and valve plate caused by collision and improves the service life of the device.

[0018] (2) Under the condition of power supply, the preheater hammer flap valve of this utility model can control the air-locking feeding rate by adjusting the limit switch at the position of the push hopper, the magnitude of the current of the spiral coil and the torque of the hammer rod; and even under the condition of power failure, the preheater hammer flap valve of this utility model can adjust the relationship between the force of the hammer rod on the valve plate and the attraction of the magnet and the gravity of the material in the hopper by adjusting the number and installation position of the counterweight block of the hammer rod, thereby achieving a stable air-locking feeding effect. Attached Figure Description

[0019] Figure 1 This is a front view of the preheater counterweight flap valve of this utility model;

[0020] Figure 2 This is a partial enlarged left view of the flap valve for the cyclone preheater of this utility model;

[0021] Figure 3 This is a top view of the flap valve for the cyclone preheater of this utility model;

[0022] Figure 4 This is a schematic diagram of the limit switch and track position of this utility model.

[0023] The components are as follows: 1. Flip valve body; 11. Storage bin; 111. Side wall; 12. Cavity; 13. Discharge port; 14. Slide rail; 141. Through hole; 2. Limit switch; 21. Insertion hole; 3. Inner extension plate; 4. Iron core; 5. Helical coil; 6. Magnet; 7. Valve plate; 8. Valve cover; 9. Rotating shaft; 10. Counterweight rod; 101. Rod body; 102. Counterweight block. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but is not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the implementation of the present invention is not limited thereto.

[0027] Example 1:

[0028] See appendix Figure 1-4 This embodiment provides a preheater counterweight flap valve, including a flap valve body 1, a valve plate 7, a limit switch 2, an inner extension plate 3, an iron core 4, a spiral coil 5, a magnet 6, a valve cover 8, a rotating shaft 9, and a counterweight rod 10.

[0029] The flap valve body 1 includes a storage bin 11, a cavity 12 and a discharge port 13. The material enters the storage bin 11 through the discharge pipe of the upper-level cyclone, and after falling from the storage bin 11, it flows through the cavity 12 and into the heat exchange pipe of the lower-level cyclone through the discharge port 13.

[0030] The valve plate 7 is installed inside the flap valve body 1 and is rotatably connected to the flap valve body 1 via a rotating shaft 9. A counterweight rod 10 is fixedly connected to each end of the rotating shaft 9.

[0031] The magnet 6 and the inner extension plate 3 are disposed on the inner wall of the flap valve body 1. The iron core 4 and the spiral coil 5 are fixedly installed on the inner extension plate 3. The spiral coil 5 is electrically connected to the limit switch 2.

[0032] The side wall 111 of the storage bin 11 is provided with a slide rail 14. The limit switch 2 is slidably connected to the side wall 111 of the storage bin 11. The limit switch 2 is provided with a socket 21. The side wall of the slide rail 14 is provided with through holes 141. The position of the limit switch 2 on the slide rail 14 can be adjusted according to the actual working conditions to adjust the airlock unloading rate. The limit switch 2 is positioned by inserting a pin 20 through the through hole 141 into the socket 21.

[0033] When the material accumulates to the limit switch 2, the limit switch 2 closes, energizing the spiral coil 5. At this time, one end of the iron core 4 generates a magnetic force with the same magnetism as the magnet 6. The magnet 6 separates from the iron core 4, causing the valve plate 7 to flip and unload the material in the storage bin 11. After the material at the limit switch 2 is unloaded, the limit switch 2 opens, de-energizing the spiral coil 5. The lever principle causes the valve plate 7 to flip and reset. When the valve plate 7 collides with the storage bin 11 for the first time after flipping, the magnet 6 firmly adheres to one end of the iron core 4, fixing the position of the valve plate 7.

[0034] Example 2:

[0035] This embodiment optimizes the structural design of the counterweight rod based on Embodiment 1.

[0036] In this embodiment, the counterweight rod 10 includes a rod body 101 and a counterweight block 102. The rod body 101 and the counterweight block 102 are provided with a plurality of matching mounting holes, and the counterweight block 102 is fixed to the rod body 101 by bolts.

[0037] In actual production, the number and position of the counterweights 102 can be adjusted according to the torque required by the actual working conditions.

[0038] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0039] Example 3:

[0040] This embodiment optimizes the safety structure of the flap valve based on embodiment 1.

[0041] In this embodiment, the preheater counterweight flap valve also includes an angle sensor and a vibrator. The angle sensor is fixedly installed on the rod 101, and the vibrator is fixedly installed on the valve plate 6.

[0042] By fixing an angle sensor to the rod 101, the swing data of the valve plate 7 can be collected in real time. According to the fluctuation curve generated by the swing frequency and swing angle of the valve plate 7, the corresponding monitoring parameters can be set, warnings can be issued for abnormal fluctuations, and the vibrator can be automatically triggered to clean the material attached to the valve plate 7, so as to prevent the flap valve from causing safety hazards due to excessive material attached to the valve plate 7.

[0043] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0044] Example 4:

[0045] This embodiment optimizes the thermal insulation and protection performance of the flap valve based on embodiment 2 or embodiment 3.

[0046] In this embodiment, the preheater counterweight flap valve also includes a protective shell and insulation cotton. The protective shell is sleeved on the outside of the flap valve body 1, and the insulation cotton is installed between the flap valve body 1 and the protective shell, and is in close contact with the flap valve body 1 and the protective shell, thereby improving the overall insulation and protection effect of the flap valve.

[0047] The other parts of this embodiment are the same as those in Embodiment 2 or Embodiment 3, so they will not be described again.

[0048] Example 5:

[0049] Based on Example 4, this embodiment optimizes the safety and sealing performance of the flap valve body 1.

[0050] In this embodiment, buffer rubber pads are provided on the outer side of the valve plate 7 and the inner wall of the flap valve body 1 to prevent the valve plate 7 from rotating accidentally due to a malfunction of the magnet or iron core, which could damage the flap valve body 1.

[0051] A sealing gasket is provided at the connection between the flap valve body 1 and the valve cover 8 to prevent wind from blowing into the flap valve body 1 and to prevent dust from spreading inside the flap valve body 1.

[0052] The other parts of this embodiment are the same as those in embodiment 5, so they will not be described again.

[0053] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0054] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A preheater counterweight flap valve, characterized in that: It includes a flap valve body (1), a valve plate (7), a limit switch (2), an inner extension plate (3), an iron core (4), a spiral coil (5), a magnet (6), a valve cover (8), a rotating shaft (9), and a counterweight rod (10). The flap valve body (1) includes a storage bin (11), a cavity (12) and a discharge port (13). The material enters the storage bin (11) through the discharge pipe of the upper-level cyclone. After falling from the storage bin (11), it flows through the cavity (12) and into the heat exchange pipe of the lower-level cyclone through the discharge port (13). The valve plate (7) is installed inside the flap valve body (1) and is rotatably connected to the flap valve body (1) via a rotating shaft (9). A counterweight rod (10) is fixedly connected to each end of the rotating shaft (9). The magnet (6) and the inner extension plate (3) are disposed on the inner wall of the flap valve body (1), the iron core (4) and the spiral coil (5) are fixedly installed on the inner extension plate (3), and the spiral coil (5) is electrically connected to the limit switch (2). The side wall (111) of the storage bin (11) is provided with a slide rail (14). The limit switch (2) is slidably connected to the side wall (111) of the storage bin (11). The limit switch (2) is provided with a socket (21). The side wall of the slide rail (14) is provided with a through hole (141). The pin (20) passes through the through hole (141) and is inserted into the socket (21) to position the limit switch (2).

2. The preheater counterweight flap valve according to claim 1, characterized in that: The counterweight rod (10) includes a rod body (101) and a counterweight block (102). The rod body (101) and the counterweight block (102) are provided with multiple matching mounting holes, and the counterweight block (102) is fixed to the rod body (101) by bolts.

3. The preheater counterweight flap valve according to claim 1, characterized in that: It also includes an angle sensor and a vibrator. The angle sensor is fixedly installed on the rod (101), and the vibrator is fixedly installed on the valve plate (7).

4. The preheater counterweight flap valve according to claim 2 or 3, characterized in that: It also includes a protective shell and insulation cotton. The protective shell is fitted on the outside of the flap valve body (1), and the insulation cotton is installed between the flap valve body (1) and the protective shell, and is in close contact with the flap valve body (1) and the protective shell.

5. The preheater counterweight flap valve according to claim 4, characterized in that: A buffer rubber pad is provided on the outer side of the valve plate (7) and the inner wall of the flap valve body (1); a sealing gasket is provided at the connection between the flap valve body (1) and the valve cover (8).

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