Circular air door with opening degree indicating limiting device

Abstract

The utility model discloses a kind of round air door with opening degree indicating limiting device, it is related to the field of pulverizing system, the technical scheme of the utility model includes cylinder shell and circular door plate;The circular door plate is arranged in the cylinder shell, the circular door plate is radially fixed with rotating shaft, the sidewall of the cylinder shell is arranged with the shaft hole of rotating cooperation with the rotating shaft;The outside of the shaft hole is provided with limiting indication seat, the limiting indication seat is provided with angle scale mark and limiting cavity, the both ends of the rotating shaft are respectively set pointer corresponding the angle scale mark, the limiting cavity is arranged in the side of rotating shaft, the rotating shaft is fixed with limiting block, the limiting block is located in the limiting cavity, the limiting block swings in the limiting cavity along with the rotating shaft rotation, the limiting cavity is used to limit the swing amplitude of limiting block. Circular door plate, pointer and limiting block can be synchronously moved by rotating shaft, the opening angle of circular door plate can be more intuitively known and the opening angle is limited.

Description

Technical Field

[0001] This utility model relates to the field of powder making systems, and in particular to a circular damper with an opening degree indication and limit device. Background Technology

[0002] The existing pulverizing system's circular damper limiter is made of δ12mm steel plate, with two half rings eccentrically welded inside the shell. The protruding ceramic anti-wear plate protrudes 20mm from the inner lining as the fully closed limit stop ring of the damper. An iron block is welded to the end of the upper half stop ring as the fully open limit stop plate.

[0003] The degree of opening is mainly determined by reading the angular stroke signal executed by the crank-type linkage actuator or the opening signal output by the circuit, or by estimating the angle position of the crank arm (or the weld stud on the shaft or the engraving on the end face of the shaft) on site.

[0004] It has the following disadvantages:

[0005] 1. The two halves of the eccentric ring of the limiter form two levels of bosses inside. First, the internal limiter causes two throttling and reversal of the medium ash or coal powder hard particles, resulting in phase change, deformation and eddy current. This causes the eccentric ring to be subjected to strong friction and scouring, resulting in severe wear, leading to inflexible door panel rotation, jamming or limit failure. Second, the throttling and reversal of the medium enters the gap of the sealing shaft seat, generating acceleration and forming a strong scouring force, which causes severe wear on the door shaft and sealing shaft seat, causing abnormal conditions such as inflexible door shaft rotation and jamming, and even door shaft breakage, shaft seat wear through and leakage. Third, the two halves of the eccentric ring form two levels of bosses inside the shell, resulting in an increase in the number of ceramic tiles, gaps and adhesive. When the medium encounters gaps, the adhesive is easily washed off, causing the ceramic tiles to loosen and lose their anti-wear properties.

[0006] 2. When adjusting the door opening, the actuator first performs the idle stroke of the crank arm linkage device, and then finally moves the door. Therefore, the opening position signal output by the indicator or circuit is the adjustment signal value executed by the actuator, not the actual opening position value of the door. Secondly, estimating the opening by observing the angle position of the crank arm (or the nail strip or engraving on the shaft) is inaccurate and may even lead to misjudgment.

[0007] 3. It is difficult to detect defects inside the casing. Usually, it is necessary to disengage the connecting rod, rotate the crank arm, make a hole, or disassemble the casing to make a further judgment. Utility Model Content

[0008] To solve the above-mentioned technical problems, this utility model provides a circular door with an opening degree indicator and limit device, which can move the circular door panel, pointer and limit block synchronously through a rotating shaft, so as to more intuitively know the opening and closing angle of the circular door panel and limit its opening and closing angle.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a circular damper with an opening degree indication and limiting device, comprising a cylindrical shell and a circular door panel;

[0010] The cylindrical shell is provided with a circular door panel, and a rotating shaft is radially fixed to the circular door panel. The side wall of the cylindrical shell is provided with a shaft hole that rotatably engages with the rotating shaft.

[0011] A limit indicator seat is provided on the outside of the shaft hole. The limit indicator seat is provided with an angle scale mark and a limit cavity. Pointers are respectively provided at both ends of the rotating shaft corresponding to the angle scale mark. The limit cavity is located on the side of the rotating shaft. A limit block is fixed on the rotating shaft. The limit block is located in the limit cavity. The limit block swings in the limit cavity as the rotating shaft rotates. The limit cavity is used to limit the swing amplitude of the limit block.

[0012] A handle is provided at one end of the rotating shaft.

[0013] The circular door panel is used to control the size of the opening in the cylindrical shell channel. The larger the angle between the circular door panel and the cross-section of the cylindrical shell, the larger the opening. The rotation of the circular door panel is controlled by an external handle.

[0014] The circular door panel, pointer, and limit block are all fixed to the rotating shaft, allowing them to rotate synchronously. The position of the circular door panel within the cylindrical shell can be visually determined by observing the pointer's rotation angle. The maximum opening and closing angle of the limit block can be controlled by adjusting the limit cavity, thus controlling the opening and closing angle of the circular door panel. Controlling the angle of the circular door panel via a handle provides greater flexibility and convenience. The circular door panel's connection to the cylindrical shell via the rotating shaft ensures greater durability and reliability.

[0015] Preferably, a sealing ring is provided between the inner wall of the shaft hole and the rotating shaft. This can improve the sealing performance between the shaft hole and the rotating shaft, and also improve the stability of the rotating shaft.

[0016] Preferably, a flange sealing plate is provided at the outer end of the shaft hole. This allows the rotating shaft to be more stably positioned within the shaft hole.

[0017] Preferably, the two sides of the limiting indicator seat are fixed to the cylindrical shell. This provides a more stable fixed limiting indicator seat.

[0018] Preferably, the limiting indicator seat has a through hole, the rotating shaft passes through the through hole, and the angle scale mark is disposed on the outer periphery of the end face of the through hole. This facilitates the marking of the pointer.

[0019] Preferably, the limiting cavity is provided on the middle section sidewall of the through hole. The limiting block is located inside the limiting cavity, and both ends of the through hole are engaged with the rotating shaft, which can significantly improve the stability and support strength of the rotating shaft engagement.

[0020] Preferably, a bearing is provided between the rotating shaft and the inner section of the through hole to reduce the friction between the rotating shaft and the through hole.

[0021] Preferably, the outer sidewall of the through hole is enlarged to form an indicator window, the pointer is located inside the indicator window, and the angle scale markings are located on the outer end face of the indicator window. The pointer being inside the indicator window protects it and prevents interference with external forces.

[0022] The beneficial effects of this utility model are:

[0023] This solution can synchronize the movement of the circular door panel, pointer, and limit block through a rotating shaft, allowing for a more intuitive understanding of the opening and closing angle of the circular door panel and the limitation of its opening and closing angle. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only four of the drawings in this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0026] Figure 2 This is a front view of an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the cylindrical shell according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the circular door panel and the pivot shaft according to an embodiment of the present utility model;

[0029] The components include: 1. Cylindrical shell; 2. Circular door panel; 3. Rotating shaft; 4. Shaft hole; 5. Limit indicator seat; 6. Angle scale mark; 7. Limit cavity; 8. Pointer; 9. Limit block; 10. Handle; 11. Sealing ring; 12. Flange sealing plate; 13. Indicator window. Detailed Implementation

[0030] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0031] Example

[0032] like Figure 1As shown, a circular damper with an opening indication and limiting device includes a cylindrical shell 1 and a circular door panel 2. The circular door panel 2 is disposed inside the cylindrical shell 1, and a rotating shaft 3 is radially fixed to the circular door panel 2. A shaft hole 4 is provided on the side wall of the cylindrical shell 1 to rotatably engage with the rotating shaft 3. A limiting indicator seat 5 is provided outside the shaft hole 4. The limiting indicator seat 5 is provided with an angle scale mark 6 and a limiting cavity 7. Pointers 8 are respectively provided at both ends of the rotating shaft 3 corresponding to the angle scale mark 6. The limiting cavity 7 is disposed on the side of the rotating shaft 3. A limiting block 9 is fixed to the rotating shaft 3. The limiting block 9 is located in the limiting cavity 7. The limiting block 9 swings within the limiting cavity 7 as the rotating shaft 3 rotates. The limiting cavity 7 is used to limit the swing amplitude of the limiting block 9. A handle 10 is provided at one end of the rotating shaft 3.

[0033] The circular door panel 2 is used to control the opening size of the channel of the cylindrical shell 1. The larger the angle between the circular door panel 2 and the cross-section of the cylindrical shell 1, the larger the opening. The rotation of the circular door panel 2 is controlled by the external handle 10.

[0034] The circular door panel 2, pointer 8, and limit block 9 are all fixed to the rotating shaft 3, so the three can rotate synchronously. Therefore, the position of the circular door panel 2 inside the cylindrical shell 1 can be determined by visually observing the rotation angle of pointer 8 from the outside. The maximum opening and closing angle of the limit block 9 can be controlled by controlling the limit cavity 7, thereby controlling the opening and closing angle of the circular door panel 2.

[0035] A sealing ring 11 is provided between the inner wall of the shaft hole 4 and the rotating shaft 3. This can improve the sealing performance between the shaft hole 4 and the rotating shaft 3, and also improve the rotational stability of the rotating shaft 3.

[0036] A flange 12 is provided at the outer end of the shaft hole 4. This allows the rotating shaft 3 to be more stably positioned within the shaft hole 4.

[0037] The two sides of the limit indicator seat 5 are fixed to the cylindrical shell 1. The limit indicator seat 5 is fixed more stably.

[0038] The limit indicator seat 5 is provided with a through hole, through which the rotating shaft 3 passes, and the angle scale mark 6 is provided on the outer periphery of the end face of the through hole. This facilitates the marking of the pointer 8.

[0039] The limiting cavity 7 is provided on the middle section sidewall of the through hole. The limiting block 9 is located in the limiting cavity 7, and both ends of the through hole are engaged with the rotating shaft 3, which can significantly improve the stability and support strength of the engagement with the rotating shaft 3.

[0040] A bearing is provided between the rotating shaft 3 and the inner section of the through hole to reduce the friction between the rotating shaft 3 and the through hole.

[0041] The outer sidewall of the through hole is enlarged to form an indicator window 13. The pointer 8 is located inside the indicator window 13, and the angle scale mark 6 is located on the outer end face of the indicator window 13. The pointer 8 is protected within the indicator window 13 to prevent interference with the outside.

[0042] The beneficial effects of this utility model are:

[0043] This solution can synchronize the movement of the circular door panel 2, the pointer 8, and the limit block 9 through the rotating shaft 3, so as to more intuitively know the opening and closing angle of the circular door panel 2 and limit its opening and closing angle.

[0044] This solution eliminates the internal limiter and replaces it with an external limiter. Firstly, the external limiter effectively avoids friction and erosion from hard particles like ash or coal powder, completely resolving issues such as stiff door rotation and jamming caused by the internal limiter. Secondly, eliminating the internal limiter increases the flow channel space, reduces obstruction, and lowers the flow velocity and erosion force of the medium entering the gap, thus reducing wear on the door hinge and sealing bearing, extending service life, and reducing door hinge wear, bearing wear-through, and leakage. Thirdly, eliminating the protrusion created by the internal limiter improves the smoothness and flatness of the housing, facilitating the reduction of ceramic sheet adhesion, gaps, and adhesive, thereby enhancing the effectiveness of wear prevention.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A circular damper with an opening degree indication and limiting device, characterized in that, It includes a cylindrical shell (1) and a circular door panel (2); The cylindrical shell (1) is provided with a circular door panel (2), and a rotating shaft (3) is radially fixed to the circular door panel (2). The side wall of the cylindrical shell (1) is provided with a shaft hole (4) that rotatably engages with the rotating shaft (3). A limit indicator seat (5) is provided on the outside of the shaft hole (4). The limit indicator seat (5) is provided with an angle scale mark (6) and a limit cavity (7). Pointers (8) are provided at both ends of the rotating shaft (3) corresponding to the angle scale mark (6). The limit cavity (7) is located on the side of the rotating shaft (3). A limit block (9) is fixed on the rotating shaft (3). The limit block (9) is located in the limit cavity (7). The limit block (9) swings in the limit cavity (7) as the rotating shaft (3) rotates. The limit cavity (7) is used to limit the swing amplitude of the limit block (9). A handle (10) is provided at one end of the rotating shaft (3).

2. A circular damper with an opening degree indication and limiting device according to claim 1, characterized in that: A sealing ring (11) is provided between the inner wall of the shaft hole (4) and the rotating shaft (3).

3. A circular damper with an opening degree indication and limiting device according to claim 1, characterized in that: A flange sealing plate (12) is provided at the outer end of the shaft hole (4).

4. A circular damper with an opening degree indication and limiting device according to claim 1, characterized in that: The two sides of the limiting indicator seat (5) are fixed to the cylindrical shell (1).

5. A circular damper with an opening degree indication and limiting device according to claim 1, characterized in that: The limiting indicator seat (5) is provided with a through hole, the rotating shaft (3) passes through the through hole, and the angle scale mark (6) is provided on the outer periphery of the end face of the through hole.

6. A circular damper with an opening degree indication and limiting device according to claim 5, characterized in that: The limiting cavity (7) is provided on the middle section sidewall of the through hole.

7. A circular damper with an opening degree indication and limiting device according to claim 6, characterized in that: A bearing is provided between the rotating shaft (3) and the inner section of the through hole.

8. A circular damper with an opening degree indication and limiting device according to claim 7, characterized in that: The outer section of the through hole is enlarged to form an indicator window (13), the pointer (8) is located inside the indicator window (13), and the angle scale mark (6) is located on the outer end face of the indicator window (13).

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