CN207796110U - A kind of smoke valve lock - Google Patents

Abstract

The utility model discloses a flue gas valve gate, which belongs to the technical field of valves. The valve gate includes a valve body, a valve plate and a screw rod; the valve body includes a first flange and a second flange for connecting the upper and lower flue gas pipes, and the gap between the first flange and the second flange is There is an active cavity; a wire sleeve is provided between the screw rod and the valve plate, and the screw rod rotates to drive the valve plate to move in the active cavity; one end of the valve body is provided with a sealing device, and the sealing device includes a pipe and A fan, a heater and a butterfly valve are arranged on the pipeline, the heater is arranged between the butterfly valve and the fan, and the air outlet of the pipeline is arranged at one end of the movable chamber. The utility model has the advantages of good sealing performance and convenient maintenance.

Description

a flue gas valve

technical field

The utility model relates to a flue gas valve gate, which belongs to the technical field of valves.

Background technique

The valve gate is also called gate valve or gate. There is a gate in the valve body which is perpendicular to the flow direction of the medium. Adjusting the height of the gate can adjust the flow of the fluid. The advantages of the gate valve are small resistance, tight shut-off, and no water hammer phenomenon, and are widely used as shut-off valves for various liquids and gases. It also has a certain adjustment function, but when it is partially opened, the gate is easily wetted by the fluid, and the fluid will cause the gate to vibrate, and the sealing surface is easy to wear. The disadvantage of the gate valve is that the structure is complex, the price is more expensive, it is not easy to repair, and the solid matter is easy to deposit in the seat groove and it is not tightly closed. Therefore, it is not suitable for pipelines containing particles, fibers or solid substances in the fluid. It is often used in pipelines for air, steam, and oil medium (temperature and pressure resistance), and also used as a vent valve and a valve for low silk systems.

The sealing performance of the valve gate in the prior art is not good, whether the valve gate is opened or closed, there will be a problem of fluid leakage, and it is inconvenient for maintenance and daily maintenance, which seriously affects normal production and reduces production efficiency.

Utility model content

The utility model aims to solve the problem of poor sealing performance and inconvenient maintenance of the valve gate in the prior art, and provides a new flue gas valve gate. Through the setting of the valve plate and the sealing devices at both ends of the valve plate, it can realize The valve plate is open, closed or partially open, with good sealing performance, and at the same time, it is convenient for maintenance and inspection operations.

For realizing the above-mentioned purpose of the invention, the technical scheme of the utility model is as follows:

A flue gas valve gate, characterized in that it includes a valve body, a valve plate and a threaded rod; the valve body includes a first flange and a second flange for connecting upper and lower flue gas pipes, and the first flange There is an active chamber between the screw rod and the second flange; a wire sleeve is provided between the screw rod and the valve plate, and the screw rod rotates to drive the valve plate to move in the movable chamber; one end of the valve body is provided with a sealing device, The sealing device includes a pipeline, a fan arranged on the pipeline, a heater and a butterfly valve, the heater is arranged between the butterfly valve and the fan, and the air outlet of the pipeline is arranged at one end of the movable chamber.

In order to better realize the utility model, further, the screw rod is driven to rotate by a multi-rotation electric actuator.

Further, one end of the screw rod is connected to the wire sleeve, and the other end passes through the end plate of the valve body and protrudes out of the valve body; the end of the screw rod is provided with a sleeve, and the sleeve and the screw rod They are connected by a flat key, and the bushing is connected with the power output end of the multi-turn electric actuator.

Further, a one-way thrust ball bearing and a self-aligning ball bearing are sheathed on the screw rod.

Furthermore, a gasket is provided inside the end plate of the valve body, and a packing gland and packing are provided on the screw between the end plate of the valve body and the one-way thrust ball bearing for compaction. Achieve good sealing performance.

The beneficial effects of the utility model:

(1) In the utility model, through the setting of two flanges connected with the flue gas pipeline, it is convenient to disassemble for maintenance. In addition, through the setting of the movable valve plate, the opening, closing or partial opening of the valve can be realized. The setting of the sealing device, after the valve is closed, the butterfly valve is opened, and the fan is opened at the same time, and the air is poured into the pipeline and enters the valve plate, increasing the pressure between the valve plate and the valve body, forcing the smoke to not flow out, and realizing the flue gas flow. It is completely sealed; at the same time, by setting up a heater, the air is heated to prevent condensation after the air meets the valve plate.

(2) In the utility model, the screw rod is driven to rotate by a multi-turn electric actuator, which has the advantages of high safety, waterproof and dustproof.

(3) In the utility model, one end of the screw rod is connected with the wire sleeve, and the other end passes through the end plate of the valve body and extends out of the valve body; the end of the screw rod is provided with a shaft sleeve, and the shaft sleeve and the wire sleeve The rods are connected by flat keys, and the shaft sleeve is connected to the power output end of the multi-turn electric actuator. The arrangement of the shaft sleeve and the flat key can improve the stability of the screw rod rotation.

(4) In the utility model, a one-way thrust ball bearing and a self-aligning ball bearing are set on the screw rod to ensure that when the screw rod is installed in the vertical direction, it can rotate smoothly even if it is stressed, and the adjustment screw The center of gravity of the rod ensures that it does not deviate during rotation.

Description of drawings

Fig. 1 is the main view structure schematic diagram of the utility model;

Fig. 2 is the top view structural representation of the utility model;

Fig. 3 is a partially enlarged view of A in Fig. 2 .

Among them, 1-valve body, 101-first flange, 102-second flange, 103-end plate of valve body, 2-valve plate, 3-screw rod, 4-moving cavity, 5-wire sleeve, 6 -Sealing device, 601-pipeline, 602-fan, 603-heater, 604-butterfly valve, 7-multi-turn electric actuator, 9-shaft sleeve, 10-flat key, 11-one-way thrust ball bearing, 12-adjustment Heart ball bearing, 13-seal, 14-stuffing gland, 15-stuffing.

Detailed ways

The utility model will be further described in detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

A flue gas valve gate, as shown in Figures 1 to 3, includes a valve body 1, a valve plate 2 and a screw rod 3; the valve body 1 includes a first flange 101 and a second flange for connecting upper and lower flue gas pipes. Two flanges 102, there is an active cavity 4 between the first flange 101 and the second flange 102; a wire sleeve 5 is provided between the screw mandrel 3 and the valve plate 2, and the screw mandrel 3 rotates to drive the valve The plate 2 moves in the movable chamber 4; one end of the valve body 1 is provided with a sealing device 6, and the sealing device 6 includes a pipeline 601 and a fan 602, a heater 603 and a butterfly valve 604 arranged on the pipeline 601, and the heating The device 603 is arranged between the butterfly valve 604 and the fan 602 , and the air outlet of the pipeline 601 is arranged at one end of the movable chamber 4 .

In this embodiment, the screw rod 3 is driven to rotate by the multi-turn electric actuator 7 . Further, one end of the screw rod 3 is connected to the wire sleeve 5, and the other end passes through the end plate 103 of the valve body and extends out of the valve body 1; the end of the screw rod 3 is provided with a sleeve 9, The shaft sleeve 9 is connected to the screw rod 3 through a flat key 10 , and the shaft sleeve 9 is connected to the power output end of the multi-turn electric actuator 7 .

In this embodiment, the screw rod 3 is provided with a one-way thrust ball bearing 11 and a self-aligning ball bearing 12 to ensure smooth rotation of the screw rod and maintain a certain stability. The inner side of the end plate 103 of the valve body is provided with a gasket 13 to further improve the sealing performance, and the screw rod between the end plate 103 of the valve body and the one-way thrust ball bearing 11 is provided with a packing gland 14 and The filler 15 maintains good sealing performance after being compressed by the bearing.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (5)

1. A flue gas valve gate, characterized in that: it includes a valve body (1), a valve plate (2) and a screw rod (3); the valve body (1) includes a first Flange (101) and second flange (102), leave movable chamber (4) between described first flange (101) and second flange (102); Screw rod (3) and valve plate ( 2) A wire sleeve (5) is provided between them, and the screw rod (3) rotates to drive the valve plate (2) to move in the movable chamber (4); one end of the valve body (1) is provided with a sealing device ( 6), the sealing device (6) includes a pipeline (601) and a fan (602), a heater (603) and a butterfly valve (604) arranged on the pipeline (601), and the heater (603) is arranged on the butterfly valve Between (604) and the fan (602), the air outlet of the pipeline (601) is arranged at one end of the movable chamber (4). 2. The flue gas valve gate according to claim 1, characterized in that: the screw rod (3) is driven to rotate by a multi-turn electric actuator (7). 3. The flue gas valve gate according to claim 2, characterized in that: one end of the screw rod (3) is connected to the wire sleeve (5), and the other end passes through the end plate (103) of the valve body, extending to the outside of the valve body (1); the end of the screw rod (3) is provided with a shaft sleeve (9), and the shaft sleeve (9) and the screw rod (3) are connected by a flat key (10). The shaft sleeve (9) is connected with the power output end of the multi-turn electric actuator (7). 4. The flue gas valve gate according to claim 2, characterized in that: the screw rod (3) is sheathed with a one-way thrust ball bearing (11) and a self-aligning ball bearing (12). 5. The flue gas valve gate according to claim 4, characterized in that: the inner side of the end plate (103) of the valve body is provided with a gasket (13), and the end plate (103) of the valve body is in contact with the single A stuffing gland (14) and stuffing (15) are arranged on the screw mandrel between the thrust ball bearings (11).