Leak-proof power plant coal mill separator outlet slide plate gate

Abstract

The utility model discloses a leakproof power plant coal mill separator outlet slide plate gate which comprises a separator outlet plate, a gland bolt is welded on the outer side of the separator outlet plate, and a packing gland a and a packing gland b are sleeved on the outer side of the gland bolt. The outer side, close to the packing gland a, of the gland bolt is in threaded connection with a first fixing nut, and the outer side, close to the packing gland b, of the gland bolt is in threaded connection with a second fixing nut. A first packing is arranged between the packing gland a and the gland bolt, and a second packing is arranged between the packing gland a and the packing gland b. According to the leakproof power plant coal mill separator outlet flashboard door, the first packing is added to the gap between the packing gland a and the gland bolt for sealing, the gap between the packing gland and the door frame is reduced, and the sealant is used for reinforcement again, so that the sealing effect of the gap is further improved.

Description

Technical Field

[0001] This utility model relates to the field of power technology, specifically to a leak-proof outlet gate for a coal mill separator in a power plant. Background Technology

[0002] A coal mill in a power plant is a device for grinding coal powder. In conjunction with its internal separator, the ground coal powder is separated so that qualified coal powder can be discharged from the coal mill more quickly. When the coal mill separator is working, coal powder leakage is prone to occur during the opening and closing of its outlet gate, which leads to environmental pollution, makes cleaning difficult, and affects civilized production on the production site.

[0003] Currently, the site uses asbestos rope, sealant, or a stainless steel casing for sealing. Using asbestos rope and sealant is ineffective and practically unable to plug leaks. The stainless steel casing method, which involves connecting to maintenance gas for sealing, with a ash discharge port at the bottom and a window at the limit switch, presents several challenges. However, the door has many irregularly shaped components at the rear, such as the cylinder, handwheel, and thermal control lines, and there is a significant gap between the door hinge and the cylinder bracket. If a stainless steel casing is used for complete sealing, the sealing performance cannot be guaranteed, and complete wrapping would hinder emergency maintenance of the door.

[0004] Therefore, we propose a leak-proof gate for the outlet of a coal mill separator in a power plant to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a leak-proof outlet gate for a coal mill separator in power plants, in order to solve the problem mentioned in the background art that the sealing performance of outlet gates for coal mill separators in power plants on the market is difficult to guarantee.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof outlet gate for a coal mill separator in a power plant, comprising a separator outlet plate, wherein a pressure cap bolt is welded to the outer side of the separator outlet plate, and a packing gland a and a packing gland b are fitted on the outer side of the pressure cap bolt, wherein a first fixing nut is threadedly connected to the outer side of the pressure cap bolt near the packing gland a, and a second fixing nut is threadedly connected to the outer side of the pressure cap bolt near the packing gland b;

[0007] A first packing is provided between the packing gland a and the gland bolt, and a second packing is provided between the packing gland a and the packing gland b;

[0008] The separator outlet plate is slidably provided with a gate body, and a sealing seat is connected to the end of the gate body away from the separator outlet plate.

[0009] The outer side of the packing gland b is connected to a fixing seat.

[0010] Preferably, the gland bolt sequentially penetrates through the packing gland a and the packing gland b, and the packing gland a and the packing gland b are locked by a first fixing nut and a second fixing nut.

[0011] Preferably, the first packing is pressed tightly at the gap between the packing gland a and the gland bolt through the packing gland a, and the first packing and the packing gland a and the gland bolt are hermetically and tightly connected by sealant.

[0012] Preferably, the second packing is in a "return" shape structure, and the second packing is pressed tightly between the packing gland b and the packing gland a through the packing gland b.

[0013] Preferably, both the fixing seat and the sealing seat are made of rubber, and both the fixing seat and the sealing seat are in a "return" shape structure.

[0014] Preferably, the fixing seat and the sealing seat are engaged with each other, and the contact surfaces of the fixing seat and the sealing seat are both inclined.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) For the anti-leakage outlet flap valve of the coal mill separator in the power plant, a first packing is added at the gap between the packing gland a and the gland bolt for sealing, reducing the gap at the contact part between the packing gland and the door frame, and sealant is used for secondary reinforcement to further enhance the sealing effect of this gap;

[0017] (2) For the anti-leakage outlet flap valve of the coal mill separator in the power plant, a packing gland b is added outside the packing gland a, and a second packing is pressed tightly between them. When the flap valve body is in the closed state, the gap between the flap valve body and the gland is reduced. At the same time, the rubber sealing seat is gradually pressed into the rubber fixing seat, and the rubber sealing seat and the rubber fixing seat are closely fitted, further reducing the gap between the flap valve body and the gland, ensuring its sealing and preventing the leakage of pulverized coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the structure of the second packing of the present utility model;

[0020] Figure 3 is a schematic diagram of the side view structure of the present utility model;

[0021] Figure 4 is a schematic diagram of the sectional view structure of the sealing seat of the present utility model;

[0022] Figure 5 is a schematic diagram of the sectional view structure of the fixing seat of the present utility model.

[0023] In the figure: 1. Separator outlet plate; 2. Packing gland a; 3. Gland bolt; 4. First fixing nut; 5. First packing; 6. Packing gland b; 7. Second fixing nut; 8. Second packing; 9. Slide gate body; 10. Fixed seat; 11. Sealing seat. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-5 , the present invention provides the following technical solutions: A leak-proof slide gate at the outlet of the separator of a power plant coal mill, including a separator outlet plate 1, a gland bolt 3 is welded to the outside of the separator outlet plate 1, a packing gland a 2 and a packing gland b 6 are sleeved on the outside of the gland bolt 3, a first fixing nut 4 is threadedly connected to the outside of the gland bolt 3 close to the packing gland a 2, and a second fixing nut 7 is threadedly connected to the outside of the gland bolt 3 close to the packing gland b 6;

[0026] Further, the gland bolt 3 passes through the packing gland a 2 and the packing gland b 6 in sequence, and the packing gland a 2 and the packing gland b 6 are locked by the first fixing nut 4 and the second fixing nut 7 to ensure the stable positions of the packing gland a 2 and the packing gland b 6;

[0027] A first packing 5 is provided between the packing gland a 2 and the gland bolt 3, and a second packing 8 is provided between the packing gland a 2 and the packing gland b 6;

[0028] Further, the first packing 5 is pressed by the packing gland a 2 at the gap between the packing gland a 2 and the gland bolt 3, and the first packing 5 and the packing gland a 2 and the gland bolt 3 are hermetically sealed and connected by sealant to enhance the sealing effect between the packing gland a 2 and the gland bolt 3 by using the first packing 5 and the sealant;

[0029] Further, the second packing 8 is in a "return" shape structure, and the second packing 8 is pressed by the packing gland b 6 between the packing gland b 6 and the packing gland a 2, which is convenient for the slide gate body 9 to move from the inside of the second packing 8, and the sealing effect between the gland and the slide gate body 9 is enhanced by using the second packing 8;

[0030] Inside the separator outlet plate 1, a plug door body 9 is slidably arranged, and a sealing seat 11 is connected to the end of the plug door body 9 away from the separator outlet plate 1; a fixing seat 10 is connected to the outside of the packing gland b6;

[0031] Furthermore, both the fixing seat 10 and the sealing seat 11 are made of rubber, and both the fixing seat 10 and the sealing seat 11 are in a "hui" - shaped structure, enabling the plug door body 9 to smoothly penetrate the fixing seat 10 for movement, and the fixing seat 10 and the sealing seat 11 can deform under force;

[0032] Furthermore, the fixing seat 10 and the sealing seat 11 are engaged with each other, and the contact surfaces of the fixing seat 10 and the sealing seat 11 are both inclined, so that the fixing seat 10 and the sealing seat 11 can be gradually pressed together under force, improving the sealing effect at the plug door body 9;

[0033] Specifically, a first packing 5 is added at the gap between the packing gland a2 and the gland bolt 3 for sealing. Control the packing gland a2 to squeeze the first packing 5 and clamp it between the packing gland a2 and the gland bolt 3. Thread the first fixing nut 4 onto the gland bolt 3 to lock the packing gland a2, thereby pressing the first packing 5 tightly. This position is fixed and immovable, and sealant can be used for re - reinforcement to further enhance the sealing effect of this gap;

[0034] The packing gland b6 is machined from a steel plate with a thickness of 12 - 15 mm. A second packing 8 is added outside the packing gland a2. The packing used here is flexible graphite packing to prevent jamming during door opening and closing. The gland bolt 3 passes through the packing gland b6, and the second fixing nut 7 is threaded onto the gland bolt 3 to lock the packing gland b6, thereby pressing the second packing 8 tightly. When the plug door body 9 is in the closed state, the gap between the plug door body 9 and the gland is reduced. At the same time, when the plug door body 9 is in the closed state, the rubber sealing seat 11 outside it is gradually pressed into the rubber fixing seat 10, further reducing the gap between the plug door body 9 and the gland, ensuring its sealing and avoiding the leakage of pulverized coal. Contents not described in detail in this specification belong to the prior art well - known to those skilled in the art.

[0035] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A leak-proof outlet gate for a coal mill separator in a power plant, comprising a separator outlet plate (1), characterized in that: A gland bolt (3) is welded to the outside of the separator outlet plate (1). A gland packing gland a (2) and a gland packing gland b (6) are sleeved on the outside of the gland bolt (3). A first fixing nut (4) is threadedly connected to the outside of the gland bolt (3) close to the gland packing gland a (2). A second fixing nut (7) is threadedly connected to the outside of the gland bolt (3) close to the gland packing gland b (6); A first packing (5) is arranged between the gland packing gland a (2) and the gland bolt (3). A second packing (8) is arranged between the gland packing gland a (2) and the gland packing gland b (6); A plug door body (9) is slidably arranged inside the separator outlet plate (1). The end of the plug door body (9) away from the separator outlet plate (1) is connected with a sealing seat (11); A fixing seat (10) is connected to the outside of the gland packing gland b (6).

2. The leak-proof outlet gate of a coal mill separator in a power plant according to claim 1, characterized in that: The gland bolt (3) passes through the gland packing gland a (2) and the gland packing gland b (6) in sequence. The gland packing gland a (2) and the gland packing gland b (6) are locked by the first fixing nut (4) and the second fixing nut (7).

3. A leak-proof outlet gate for a coal mill separator in a power plant according to claim 1, characterized in that: The first packing (5) is pressed by the gland packing gland a (2) at the gap between the gland packing gland a (2) and the gland bolt (3). The first packing (5) and the gland packing gland a (2) and the gland bolt (3) are hermetically sealed and connected by sealant.

4. A leak-proof outlet gate for a coal mill separator in a power plant according to claim 1, characterized in that: The second packing (8) is in a "return" shape structure. The second packing (8) is pressed by the gland packing gland b (6) between the gland packing gland b (6) and the gland packing gland a (2).

5. A leak-proof outlet gate for a coal mill separator in a power plant according to claim 1, characterized in that: Both the fixing seat (10) and the sealing seat (11) are made of rubber. Both the fixing seat (10) and the sealing seat (11) are in a "return" shape structure.

6. A leak-proof power plant coal mill separator outlet gate according to claim 1, characterized in that: The fixing seat (10) and the sealing seat (11) are engaged with each other. The contact surfaces of the fixing seat (10) and the sealing seat (11) are inclined.

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