Durable fireproof valve

Abstract

The utility model discloses a durable fireproof valve, which belongs to the technical field of valves and comprises a valve body, a driving element, a valve rod and a valve plate, a channel is arranged in the valve body, the valve rod penetrates through the valve body, the valve plate is arranged in the valve body and used for opening or closing the channel, and a first sealing semi-ring and a second sealing semi-ring are arranged in the valve body. The first side face of the valve plate is connected with a first sealing piece, the second side face of the valve plate is connected with a second sealing piece, the first side face is connected with an abutting piece, and the second side face is also connected with an abutting piece. The sealing device is good in sealing effect in a high-temperature and high-pressure severe environment, small in air leakage after being used for a long time, and high in reliability; the valve plate is provided with the abutting piece corresponding to the sealing piece, the deformation amount of the sealing piece in the severe environment is reduced, the air leakage amount is reduced, the effectiveness of the fireproof valve is guaranteed, the service life of the fireproof valve is long, and the later maintenance cost is low. The graphite packing ring is arranged in the bearing seat, so that the sealing performance of the fireproof valve is ensured, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a durable fireproof damper. Background Art

[0002] Fire dampers are usually installed in regenerative thermal oxidation furnace equipment to prevent accidents such as fires in the oxidation furnace. Fire dampers mainly include valve body, valve stem, valve plate and actuator. The actuator of the fire damper is connected to the valve stem to drive the valve plate. The actuator is electric and pneumatic. When the internal smoke temperature reaches the set temperature of the temperature sensing device, the actuator is triggered to drive the valve stem and valve plate to rotate and close, so as to prevent the spread of fire.

[0003] Existing fire dampers are usually located in high temperature and high pressure places, the reliability and durability of the seals are poor, and the sealing effect is poor after long-term use. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a durable fire damper which can maintain a good sealing effect after being used for a long time in a harsh environment.

[0005] Technical solution: In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] A durable fire damper, characterized in that it comprises a valve body, a driving element connected to the valve body, a valve stem connected to the driving element and a valve plate connected to the valve stem, the valve body being provided with a channel, the valve stem penetrating the valve body, the valve plate being arranged in the valve body and being used to open or close the channel, the valve body being provided with a first sealing half ring and a second sealing half ring corresponding to the valve plate, a first sealing member corresponding to the first sealing half ring being connected to a first side surface of the valve plate, a second sealing member corresponding to the second sealing half ring being connected to a second side surface of the valve plate, a tightening member being connected to a position on the first side surface corresponding to the first seal, and a tightening member being also connected to a position on the second side surface corresponding to the second seal.

[0007] Furthermore, the abutting member includes a plurality of abutting blocks, each of which is provided with a splicing block for being spliced ​​with an adjacent abutting block, and the abutting block is connected to the valve plate via a first bolt.

[0008] Furthermore, the valve body is provided with a first bearing seat and a second bearing seat corresponding to the valve stem, the first bearing seat is provided with a first bearing connected to the valve stem, and the second bearing seat is provided with a second bearing connected to the valve stem.

[0009] Furthermore, a first shaft sealing ring is provided in the first bearing seat, and a second shaft sealing ring is provided in the second bearing seat.

[0010] Furthermore, the first sealing member and the second sealing member both adopt graphite packing, and the first shaft sealing ring and the second shaft sealing ring both adopt graphite packing ring.

[0011] Furthermore, the first seal and the second seal are respectively provided with two, and the first seal and the second seal are respectively connected to the valve plate through second bolts.

[0012] Furthermore, the valve plate is a circular plate.

[0013] Furthermore, the first sealing half ring and the second sealing half ring are located on the same circular ring.

[0014] Furthermore, a plurality of reinforcing ribs are connected to the valve plate.

[0015] Furthermore, the driving element is a pneumatic actuator.

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

[0017] 1. By arranging the first sealing half ring and the second sealing half ring in the valve body, and arranging two corresponding seals on the two sides of the valve plate, the seals are made of graphite packing, which has good sealing effect in the harsh environment of high temperature and high pressure, less air leakage after long-term use, and high reliability;

[0018] 2. A fastening piece corresponding to the seal is arranged on the valve plate to limit the deformation of the seal, which can limit the position of the two seals, reduce the deformation of the seal in a harsh environment, reduce the amount of air leakage, ensure the effectiveness of the fire damper, and prolong the service life of the fire damper with low maintenance cost in the later stage;

[0019] 3. A graphite packing ring is installed in the bearing seat to ensure the sealing of the fire damper and extend the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of the fire damper of the utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 yes Figure 1 The schematic diagram of the cross-section structure along the BB line;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the fire damper;

[0024] Figure 5 yes Figure 4 Enlarged view of point C in the middle;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the fire damper from another angle;

[0026] Figure 7 yes Figure 6 Enlarged view of point D in the middle. DETAILED DESCRIPTION

[0027] The present invention will be further explained below in conjunction with specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0028] like Figure 1 As shown, a durable fire damper includes a valve body 1, a driving element 2, a valve stem 3 and a valve plate 4. The valve body 1 is in a circular tubular shape as a whole, and a circular channel 11 is formed in the middle of the valve body 1. The valve body 1 is made of S30403 material. A connecting frame 11 is arranged on one side of the valve body 1. The driving element 2 is connected to the valve body 1 through the connecting frame 11. The driving element 2 adopts an existing pneumatic actuator and is driven by air pressure. One end of the valve stem 3 is connected to the driving element 2 and rotates under the drive of the driving element 2. The other end of the valve stem 3 passes through the valve body 1. The valve plate 4 is connected to the valve stem 3. The valve plate 4 is a circular plate. The valve plate 4 is located in the valve body 1. When the valve body 1 rotates, the valve plate 4 is driven to rotate. The valve plate 4 is used to open or close the channel 11. A plurality of reinforcing ribs 43 are connected to the valve plate 4 to enhance the strength and reliability of the valve plate 4.

[0029] like Figure 1 and Figure 3 As shown, the first bearing seat 81 and the second bearing seat 82 are connected to both sides of the valve body 1. The first bearing seat 81 is located on the side where the driving element 2 is located on both sides of the valve body 1, and the second bearing seat 82 is located on the other side. Two first bearings 83 are arranged in the first bearing seat 81, and a second bearing 84 is arranged in the second bearing seat 82. The first bearing 83 and the second bearing 84 are respectively sleeved on the valve stem 3, thereby forming support for the valve stem 3 on both sides of the valve body 1 to ensure the stability of the valve body 1 during operation. A first shaft sealing ring 85 is provided in the first bearing seat 81 between the two first bearings 83, and the first shaft sealing ring 85 is sleeved on the outer ring of the valve stem 3. A second shaft sealing ring 86 is provided in the second bearing seat 82, and the second shaft sealing ring 86 is sleeved on the outer ring of the valve stem 3. The first shaft sealing ring 85 and the second shaft sealing ring 86 are both made of graphite packing rings. The graphite packing rings are mainly made of graphite wires reinforced with various reinforcing fibers, metal wires, etc. as raw materials, and are finely woven. They have a good sealing effect in the axial direction of the valve stem 3, reduce the leakage of gas in the valve to the outside, and can also be used for a long time in high temperature and high pressure environments such as oxidation furnaces.

[0030] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a first sealing half ring 51 and a second sealing half ring 52 are provided on the inner wall of the valve body 1. The first sealing half ring 51 and the second sealing half ring 52 are on the same circular ring. The two sealing half rings are arranged on the upper and lower sides of the valve stem 3 and are not connected to the valve stem 3. The diameter of the valve plate 4 is smaller than the inner diameter of the valve body 1, so that the valve plate 4 can rotate in the valve body 1. The valve plate 4 includes a first side surface 41 and a second side surface 42. When the valve plate 4 closes the channel 11, the upper edge of the first side surface 41 abuts against the first sealing half ring 51, and the lower edge of the second side surface 42 abuts against the second sealing half ring 52. A first sealing member 61 corresponding to the first sealing half ring 51 is connected to the first side surface 41. The first sealing member 61 adopts a graphite packing and is connected to the valve plate 4 through a second bolt 63. The second bolt 63 is buried in the first sealing member 61 after being tightened, so as not to protrude from the outer surface of the first sealing member 61. The second sealing member 62 is arranged in a ring shape on the upper edge of the first side surface 41, and the first sealing member 61 is provided with two first sealing members 61. The width of the two first sealing members 61 corresponds to the width of the first sealing half ring 51. When the valve plate 4 needs to close the channel 11, the two first sealing members 61 are pressed on the first sealing half ring 51 (at this time, the second bolt 63 is buried in the graphite packing and does not prevent the first sealing member 61 from fitting with the first sealing half ring 51), so as to form a good seal. Similarly, a second sealing member 62 corresponding to the second sealing semi-ring 52 is connected to the second side surface 42. The second sealing member 62 also adopts graphite packing and is connected to the valve plate 4 through a second bolt 63. The second bolt 63 is buried in the second sealing member 62 after being tightened, so as not to protrude from the outer surface of the second sealing member 62. The second sealing member 62 is arranged in a ring shape at the lower edge of the second side surface 42, and the second sealing member 62 is provided with two second sealing members 62. The width of the two second sealing members 62 corresponds to the width of the second sealing semi-ring 52. When the valve plate 4 needs to close the channel 11, the two second sealing members 62 are pressed on the second sealing semi-ring 52 (at this time, the second bolt 63 is buried in the graphite packing and does not prevent the second sealing member 62 from fitting with the second sealing semi-ring 52), so as to form a good seal.

[0031] like Figure 2 , Figure 5 and Figure 7As shown, a clamping piece 7 is provided on both the first side surface 41 and the second side surface 42. The clamping block 71 is connected to the valve plate 4 by a plurality of first bolts 72. The clamping piece 7 is annular. The two clamping pieces 7 are respectively arranged on the inner sides of the first sealing piece 61 and the second sealing piece 62, so as to press the two sealing pieces from the rear. When the sealing pieces are compressed or easily deformed by high temperature, the clamping piece 7 can limit the position of the two sealing pieces, reduce the deformation of the sealing pieces, and reduce the air leakage when the valve plate 4 is closed, thereby ensuring the effectiveness of the fire damper and extending the service life of the fire damper. The clamping member 7 includes a plurality of clamping blocks 71, each of which is connected to the valve plate 4 by two first bolts 72. The clamping block 71 is an arc-shaped metal plate. A splicing block 711 is provided on the clamping block 71. The splicing block 711 is semicircular and a groove corresponding to the splicing block 711 is provided on the clamping block 71. The middle part of the annular clamping member 7 is spliced ​​together by a plurality of splicing blocks 711. The first splicing block at the front end of the annular clamping member 7 has only the splicing block 711 and no groove is set. The tail splicing block at the tail end of the annular clamping member 7 has no splicing block 711 and only a groove is set, thereby forming an annular clamping member 7.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A durable fire damper, characterized in that: The invention comprises a valve body (1), a driving element (2) connected to the valve body (1), a valve stem (3) connected to the driving element (2), and a valve plate (4) connected to the valve stem (3); a passage is provided in the valve body (1); the valve stem (3) passes through the valve body (1); the valve plate (4) is arranged in the valve body (1) and is used to open or close the passage; a first sealing half ring (51) and a second sealing half ring (52) corresponding to the valve plate (4) are provided in the valve body (1); a first sealing member (61) corresponding to the first sealing half ring (51) is connected to the first side surface (41) of the valve plate (4); a second sealing member (62) corresponding to the second sealing half ring (52) is connected to the second side surface (42) of the valve plate (4); a pressing member (7) is connected to a position on the first side surface (41) corresponding to the first sealing member (61); and a pressing member (7) is also connected to a position on the second side surface (42) corresponding to the second sealing member (62).

2. The durable fire damper according to claim 1, characterized in that: The abutting member (7) comprises a plurality of abutting blocks (71), each of which is provided with a splicing block (711) for splicing with an adjacent abutting block (71), and the abutting block (71) is connected to the valve plate (4) via a first bolt (72).

3. The durable fire damper according to claim 1, characterized in that: The valve body (1) is provided with a first bearing seat (81) and a second bearing seat (82) corresponding to the valve stem (3); the first bearing seat (81) is provided with a first bearing (83) connected to the valve stem (3); the second bearing seat (82) is provided with a second bearing (84) connected to the valve stem (3).

4. The durable fire damper according to claim 3, characterized in that: A first shaft sealing ring (85) is arranged in the first bearing seat (81), and a second shaft sealing ring (86) is arranged in the second bearing seat (82).

5. The durable fire damper according to claim 4, characterized in that: The first sealing member (61) and the second sealing member (62) both use graphite packing, and the first shaft sealing ring (85) and the second shaft sealing ring (86) both use graphite packing.

6. The durable fire damper according to claim 1, characterized in that: The first sealing member (61) and the second sealing member (62) are respectively provided with two, and the first sealing member (61) and the second sealing member (62) are respectively connected to the valve plate (4) via second bolts (63).

7. The durable fire damper according to claim 1, characterized in that: The valve plate (4) is a circular plate.

8. The durable fire damper according to claim 1, characterized in that: The first sealing half ring (51) and the second sealing half ring (52) are located on the same circular ring.

9. The durable fire damper according to claim 1, characterized in that: A plurality of reinforcing ribs (43) are connected to the valve plate (4).

10. The durable fire damper according to claim 1, characterized in that The driving element (2) is a pneumatic actuator.

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