Smoke pipeline stop valve capable of being rapidly and tightly closed

Abstract

The utility model relates to the technical field of flue gas pipeline cut-off, in particular to a flue gas pipeline cut-off valve capable of being rapidly and tightly closed, which comprises a flue, a concentric-square-shaped plate is fixedly sleeved in the flue, a gate seat is fixedly sleeved on the inner side of the concentric-square-shaped plate, and a transverse plate is arranged above the gate seat. The filter screen filters impurities in smoke, the air cylinder is started to drive the valve rod to move downwards, the valve rod drives the transverse plate to move downwards through the connecting plate, the transverse plate drives the concentric-square-shaped rubber strip to move into the concentric-square-shaped groove, and the connecting plate slides on the outer sides of the four round rods and stretches the spring to generate counter-acting force. The transverse plate drives the zigzag rubber strip to be tightly attached to the interior of the zigzag groove, so that the sealing and isolating effects are achieved, the sealing performance of the flue is improved, reverse flowing of smoke can be isolated, the smoke is prevented from being leaked through the non-tight position, an induced draft fan of the cold standby boiler does not need to keep low-speed rotation to block reverse flowing of the smoke, and electric energy consumption is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke pipe cut-off, in particular to a smoke pipe cut-off valve which can be closed quickly and tightly. Background Art

[0002] With the increase of flue gas treatment facilities, the flue of thermal power plants has changed from slightly negative pressure to positive pressure, which causes flue gas backflow. The corrosive flue gas flows into dust collectors, boilers and other equipment, aggravating equipment corrosion and seriously shortening the service life of the equipment.

[0003] Although a damper door is installed in the flue, the damper door is not tight enough to isolate the backflow of flue gas, and some flue gas still leaks through the loose parts. Therefore, the induced draft fan of the cold standby boiler still needs to keep rotating at a low speed to prevent the backflow of flue gas and generate power consumption. Therefore, we propose a flue gas duct stop valve that can be closed quickly and tightly to solve the above problem. Utility Model Content

[0004] The utility model aims to provide a smoke duct stop valve which can be closed quickly and tightly, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas duct stop valve that can be closed quickly and tightly, comprising a flue, a fixed sleeve of a circular plate is provided in the flue, the inner fixed sleeve of the circular plate is provided with a gate seat, a horizontal plate is provided above the gate seat, the outer fixed sleeve of the horizontal plate is provided with a circular rubber strip, a double-layer gate plate is fixedly connected to the bottom of the horizontal plate, a circular groove is provided on the top of the circular plate, the circular rubber strip cooperates with the circular groove, a connecting plate is provided above the horizontal plate, a valve stem is fixedly connected to the top of the connecting plate, and a cylinder is fixedly connected to the top of the flue.

[0006] Further preferably, the end of the output shaft of the cylinder is fixedly connected to the top end of the valve stem.

[0007] Further preferably, four round rods are fixedly connected to the top of the transverse plate.

[0008] Further preferably, the connecting plate is slidably sleeved on the outside of four round rods, and round blocks are fixedly connected to the top ends of the round rods.

[0009] Further preferably, a same spring is fixedly connected between the bottom of the circular block and the top of the connecting plate, and the spring is movably sleeved on the outer side of the corresponding round rod.

[0010] Further preferably, two square rods are fixedly connected to the top inner wall of the flue, two rectangular rods are fixedly connected to the top of the connecting plate, the rectangular rods are slidingly sleeved on the outer sides of the corresponding square rods, and a filter is provided in the sliding sleeve inside the flue.

[0011] Further preferably, the top of the filter screen extends to above the flue, and two rectangular blocks are fixedly connected to the right side of the filter screen, and the rectangular blocks are threadedly connected to the flue through bolts.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the filter screen of the utility model filters impurities in the flue gas, the starting cylinder drives the valve stem to move downward, the valve stem drives the cross plate to move downward through the connecting plate, the cross plate drives the return rubber strip to move into the return groove, the connecting plate slides on the outside of the four round rods and stretches the spring to generate a reaction force, so that the cross plate drives the return rubber strip to fit tightly in the return groove, thereby achieving a sealing and isolation effect, improving the sealing of the flue, isolating the backflow of flue gas, and preventing the flue gas from leaking through loose places, so that the induced draft fan of the cold standby boiler does not need to keep rotating at a low speed to prevent the backflow of flue gas, and no electric energy consumption will be generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0015] Figure 3 This is a bottom-up three-dimensional structural schematic diagram of the utility model;

[0016] Figure 4 for Figure 2 Schematic diagram of the enlarged three-dimensional structure of area A in the middle.

[0017] In the figure: 1, flue; 2, circular plate; 3, gate seat; 4, horizontal plate; 5, circular rubber strip; 6, double-layer gate; 7, circular groove; 8, connecting plate; 9, valve stem; 10, bolt; 11, cylinder; 12, round rod; 13, round block; 14, spring; 15, square rod; 16, rectangular rod; 17, filter screen; 18, rectangular block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example

[0020] See also Figure 1-4The utility model provides a technical solution: a flue gas duct stop valve that can be quickly and tightly closed, including a flue 1, a circular plate 2 is fixedly sleeved in the flue 1, a gate seat 3 is fixedly sleeved inside the circular plate 2, a horizontal plate 4 is arranged above the gate seat 3, a circular rubber strip 5 is fixedly sleeved outside the horizontal plate 4, a double-layer gate 6 is fixedly connected to the bottom of the horizontal plate 4, a circular groove 7 is opened on the top of the circular plate 2, the circular rubber strip 5 cooperates with the circular groove 7, a connecting plate 8 is arranged above the horizontal plate 4, a valve stem 9 is fixedly connected to the top of the connecting plate 8, a cylinder 11 is fixedly connected to the top of the flue 1, and a filter screen 17 is provided to filter impurities in the flue gas. To filter, the cylinder 11 is started to drive the valve stem 9 to move downward. The valve stem 9 drives the cross plate 4 to move downward through the connecting plate 8. The cross plate 4 drives the return rubber strip 5 to move into the return groove 7. The connecting plate 8 slides on the outside of the four round rods 12 and stretches the spring 14 to generate a reaction force, so that the cross plate 4 drives the return rubber strip 5 to fit tightly into the return groove 7, thereby achieving a sealing and isolation effect, improving the sealing of the flue 1, isolating the backflow of smoke, and preventing smoke from leaking through loose places, so that the induced draft fan of the cold standby boiler does not need to keep rotating at a low speed to prevent the backflow of smoke, and no power consumption will be generated.

[0021] In this embodiment, specifically: the output shaft end of the cylinder 11 is fixedly connected to the top end of the valve stem 9;

[0022] In this embodiment, specifically: four round rods 12 are fixedly connected to the top of the horizontal plate 4;

[0023] In this embodiment, specifically: the connecting plate 8 is slidably sleeved on the outside of the four round rods 12, and the top of the round rod 12 is fixedly connected with a round block 13;

[0024] In this embodiment, specifically: a spring 14 is fixedly connected between the bottom of the circular block 13 and the top of the connecting plate 8, and the spring 14 is movably sleeved on the outer side of the corresponding round rod 12;

[0025] In this embodiment, specifically: two square rods 15 are fixedly connected to the top inner wall of the flue 1, two rectangular rods 16 are fixedly connected to the top of the connecting plate 8, the rectangular rods 16 are slidably sleeved on the outer sides of the corresponding square rods 15, and a filter screen 17 is slidably sleeved in the flue 1;

[0026] In this embodiment, specifically: the top of the filter screen 17 extends to the top of the flue 1 , and two rectangular blocks 18 are fixedly connected to the right side of the filter screen 17 . The rectangular blocks 18 are threadedly connected to the flue 1 through bolts 10 .

[0027] The utility model is at work: when in use, the smoke enters the smoke duct 1 through the right side of the smoke duct 1, and the filter 17 filters the impurities in the smoke. When it is necessary to isolate the smoke and place the smoke to be discharged through the left side of the smoke duct 1, the cylinder 11 is started, and the cylinder 11 drives the valve stem 9 to move downward, and the valve stem 9 drives the connecting plate 8 to move downward, and the connecting plate 8 drives the rectangular rod 16 to slide on the outside of the square rod 15, and the connecting plate 8 drives the cross plate 4 to move downward, and the cross plate 4 moves downward to drive the double-layer gate plate 6 to move downward into the gate seat 3, and the cross plate 4 drives the return-shaped rubber strip 5 to move into the return-shaped groove 7. When the bottom of the cross plate 4 contacts the top of the gate seat 3, the connecting plate 8 continues to move to generate a reaction force. Under the reaction force, the connecting plate 8 slides on the outside of the four round rods 12 and stretches the spring 14. At this time, the spring 14 automatically Under the action of the elastic force of the body, a reaction force is generated. The spring 14 generates a reaction force on the round rod 12 through the round block 13, and the round rod 12 generates a reaction force on the cross plate 4. Under the reaction force, the cross plate 4 drives the circular rubber strip 5 to fit tightly in the circular groove 7, thereby achieving the effect of sealing and isolation, preventing the smoke from being discharged through the left side of the flue 1. When the filter 17 needs to be taken out, the bolt 10 is rotated in the reverse direction to separate it from the flue 1. At this time, the filter 17 is moved upward, and the filter 17 can be removed for cleaning, thereby forming a flue gas pipeline stop valve that can be quickly and tightly closed, improving the sealing of the flue 1, and can isolate the backflow of smoke, avoiding smoke leakage through loose places, so that the draft fan of the cold standby boiler does not need to keep rotating at a low speed to prevent the backflow of smoke, and no power consumption will be generated.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas duct stop valve capable of rapid and tight closing, comprising a flue (1), characterized in that: A circular plate (2) is fixedly sleeved in the flue (1), a gate seat (3) is fixedly sleeved inside the circular plate (2), a transverse plate (4) is provided above the gate seat (3), a circular rubber strip (5) is fixedly sleeved outside the transverse plate (4), a double-layer gate plate (6) is fixedly connected to the bottom of the transverse plate (4), a circular groove (7) is provided on the top of the circular plate (2), the circular rubber strip (5) cooperates with the circular groove (7), a connecting plate (8) is provided above the transverse plate (4), a valve stem (9) is fixedly connected to the top of the connecting plate (8), and a cylinder (11) is fixedly connected to the top of the flue (1).

2. A flue gas duct stop valve capable of rapid and tight closing according to claim 1, characterized in that: The output shaft end of the cylinder (11) is fixedly connected to the top end of the valve stem (9).

3. A smoke pipe stop valve capable of rapid and tight closing according to claim 2, characterized in that: Four round rods (12) are fixedly connected to the top of the transverse plate (4).

4. A flue gas duct stop valve capable of rapid and tight closing according to claim 3, characterized in that: The connecting plate (8) is slidably sleeved on the outside of four round rods (12), and the top ends of the round rods (12) are fixedly connected with round blocks (13).

5. A smoke pipe stop valve capable of rapid and tight closing according to claim 4, characterized in that: A spring (14) is fixedly connected between the bottom of the circular block (13) and the top of the connecting plate (8), and the spring (14) is movably sleeved on the outer side of the corresponding round rod (12).

6. A smoke duct stop valve capable of rapid and tight closing according to claim 5, characterized in that: Two square rods (15) are fixedly connected to the top inner wall of the flue (1), two rectangular rods (16) are fixedly connected to the top of the connecting plate (8), the rectangular rods (16) are slidably sleeved on the outer sides of the corresponding square rods (15), and a filter screen (17) is slidably sleeved inside the flue (1).

7. A smoke duct stop valve capable of rapid and tight closing according to claim 6, characterized in that: The top of the filter screen (17) extends to the top of the flue (1), and two rectangular blocks (18) are fixedly connected to the right side of the filter screen (17), and the rectangular blocks (18) are threadedly connected to the flue (1) via bolts (10).

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