CN212960011U

CN212960011U - Fireproof guide check valve

Info

Publication number: CN212960011U
Application number: CN202021588112.0U
Authority: CN
Inventors: 杨开良
Original assignee: Nanjing Xiewei Machinery Co ltd
Current assignee: Nanjing Xiewei Machinery Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-04-13
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a fire prevention direction check valve, including the valve body of two opening doors, be equipped with in the valve body about the vertical beam symmetry valve block, the valve body is installed in diversion pipeline front end, and the valve body still includes temperature sensing device and deflector, the temperature sensing device is installed on the valve body, including the spring, locate the location axle on the valve body, two L shape connecting rods and the fuse-link of fixing this connecting rod about the vertical beam symmetry, there is the clearance between temperature sensing device and valve block, and the temperature sensing device is opened under the spring action according to the temperature rise to make L shape connecting rod support and lean on the valve block of two opening doors; the guide plate is arranged on one side of the valve body and used for guiding the flow direction of gas entering the valve. The temperature sensing device has high stability when being closed, and after the connecting rod is put down, the valve block is greatly stressed by the locking mode of the transverse edge and the valve block, is not easy to be opened by large air flow suction, and has high stability; simultaneously, this temperature sensing device's locking is fast, and the leakproofness is good, and structural strength is high, the security is high.

Description

Fireproof guide check valve

Technical Field

The utility model relates to a check valve especially relates to a fire prevention direction check valve.

Background

In ventilation ducts in public places or in smoke exhaust ducts of range hoods, check valves are usually provided for preventing the spread of high-temperature smoke in case of fire. The double-valve-piece connecting-rod type temperature sensing device has the advantages of small occupied space of the valve pieces and large air outlet volume during ventilation, and is often applied to ventilation pipelines or smoke exhaust ventilators in public places. In the double-valve-piece single-spring connecting-rod type temperature sensing device, the most key structure is the temperature sensing device, namely the device for locking the valve piece of the check valve according to the temperature of the airflow of the pipeline. Many check valve temperature sensing devices utilize spring thrust to lock the valve block, but under high temperature, the spring is inefficacy easily, then leads to the valve block to open, causes the intensity of a fire further to spread. Meanwhile, the strength of the temperature sensing device of the existing temperature sensing device is not high, and the temperature sensing device can block the opening and closing of the valve plate in a daily closed state to influence the ventilation volume; the existing valve body structure cannot guide the wind direction, if the existing valve body structure is arranged on a turning bent pipeline, the problems of air inlet scouring and the like are easily caused, and the test rule under a new standard cannot be met.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a work efficiency is high, locking is rapid, have the fire prevention check valve of direction function to solve above-mentioned problem.

The technical scheme is as follows: the utility model discloses a fire prevention direction check valve, including the valve body of two opening doors, be equipped with in the valve body about the vertical beam symmetry valve block, the valve body is installed in diversion pipeline front end, and the valve body still includes temperature sensing device and deflector, the temperature sensing device is installed on the valve body, including the spring, locate the location axle on the valve body, two L shape connecting rods and the fuse-link of fixed this connecting rod about the vertical beam symmetry, there is the clearance between temperature sensing device and valve block, and the temperature sensing device is opened under the spring action according to the temperature rise to make L shape connecting rod support and lean on and live two opening door valve blocks; the guide plate is arranged on one side of the valve body and used for guiding the flow direction of gas entering the valve.

The guide plate is arranged on the inner wall of the valve body and comprises a folded edge which forms an included angle with the inner wall of the valve body, and the inclined direction of the folded edge faces the direction of the turning pipeline.

The guide plate is of a cover-shaped structure arranged on the outer side of the valve body.

The valve block is formed by punching and fixing two unit valve blocks, and the coverage area of the guide plate is smaller than half of the flow area of the valve body.

The L-shaped connecting rod comprises a vertical edge and a transverse edge, and one end of the vertical edge is connected with the positioning shaft through a fixed shaft, so that the connecting rod rotates around the fixed shaft; one end of the spring is connected with the L-shaped connecting rod, and the other end of the spring is connected with the far end of the positioning shaft.

The positioning shaft is parallel to the vertical beam.

The positioning shaft is provided with a fixing device, and two ends of the fixing device are connected with the transverse edges through fuse pieces respectively.

The valve block is the slope for the valve body lateral wall, the deflector is located the valve block and is the one end that the valve body lateral wall contained angle is the obtuse angle.

The transverse edge of the L-shaped connecting rod faces to one end of the valve block, and the included angle between the valve block and the side wall of the valve body is an acute angle.

The periphery of the valve plate is provided with a groove for increasing the strength of the valve plate.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is as follows showing:

(1) the utility model discloses the temperature sensing device accounts for the space few during check valve normal use state, can ensure that the check valve block can be opened to the biggest, and the valve body air volume is the biggest under the closure state, and when the check valve was applied to electrical apparatus such as smoke ventilator, the oil smoke emission was bigger.

(2) The utility model discloses a valve body has the direction function, before can locating the diversion pipeline, plays the cushioning effect to the change of wind direction.

(3) The temperature sensing device has high stability when being closed, and after the connecting rod is put down, the valve block is greatly stressed by the locking mode of the transverse edge and the valve block, is not easy to be opened by large air flow suction, and has high stability; simultaneously, this temperature sensing device's locking is fast, and the leakproofness is good, and structural strength is high, the security is high.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of the temperature sensing device of the present invention;

fig. 3 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 4 is a schematic structural diagram of embodiment 3 of the present invention;

fig. 5 is a schematic view of the normal use state of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the two-door valve body 1 of embodiment 1 of the present invention is provided with a symmetrical valve plate 2 about a vertical beam 10, the valve body 1 is installed at the front end of a turning pipeline, and the valve body 1 further includes a temperature sensing device and a guide plate 7. The valve block 2 is formed by stamping the unit valve block, the problems of high cost, low connection strength and short service life caused by the fact that the traditional valve block is connected by rivets are solved, the service life of the valve block is improved, the manufacturing cost is reduced, and the manufacturing process is simplified. The periphery of the valve plate 2 is provided with a groove for increasing the strength of the valve plate.

The temperature sensing device comprises a positioning shaft 3, a spring 6, an L-shaped connecting rod 5, a fixed shaft 8 and the like. Two ends of the positioning shaft 3 are connected with the valve body 1, are parallel to the vertical beam 7 and are positioned in the same vertical plane. The middle part of the positioning shaft 3 is provided with a fixed shaft 8, one end of the vertical edge 51 of the L-shaped connecting rod 5 is connected with the fixed shaft 8, and the connecting rod can rotate around the fixed shaft 8. The transverse edges of the two connecting rods are vertical to the positioning shaft and face to the direction opposite to the positioning shaft 3. In this embodiment, two springs 6 are provided, one end of each spring is connected to each of the two transverse edges, and the other end of each spring is connected to the distal end of the positioning shaft. Still be equipped with fixing device 4 on the location axle 3, two horizontal limits are connected through fuse-link 9 respectively at the both ends of fixing device 4 for under the valve normal use state, L shape connecting rod 5 is fixed in location axle 3 one end and spring 6 is in tensile state.

A connecting piece for reinforcement is arranged between the two vertical rods 51, so that the deformation of the connecting rods is prevented, and the problem of asynchronism generated in the motion process of the two connecting rods is prevented. The vertical edge 51 of the L-shaped connecting rod 5 is inclined relative to the positioning shaft 3 along the horizontal direction, the inclined angle enables the opened transverse edge 52 to abut against the valve plate 2, the width of the transverse edge is corresponding to the width of the valve plate, the connecting rod is guaranteed not to contact with the inner surface of the valve body when falling, and meanwhile the connecting rod can abut against the valve plate. The vertical edge 51 of the L-shaped link 5 is inclined in the vertical direction with respect to the positioning shaft 3, so that the transverse edge 52 is located below the positioning shaft 3, i.e. inside the check valve body 1, when the check valve is in normal use.

The guide plate 7 is arranged on the inner wall of the valve body 1 and comprises a folding edge 72 and a fixed edge 71, the folding edge 72 and the fixed edge 71 form an included angle with the inner wall of the valve body 1, the fixed edge 71 is used for connecting the guide plate 7 with the inner wall of the valve body 1, and the inclination direction of the folding edge 72 faces the direction of the turning pipeline and is used for guiding the inlet air into the pipeline after turning. In this embodiment, deflector 7 is symmetrical about erecting roof beam 10, and the mounting height of deflector 7 has a certain distance with valve block 2, and hem 72 is the acute angle with the contained angle of inner wall to guarantee that valve body 1 in the normal use, valve block 2 can all be opened.

As shown in fig. 3, in embodiment 2 of the present invention, the guide plate 7 may be a cover-shaped structure provided outside the valve body 1, and the guide plate 7 has a hemispherical shape, an arc shape, or a rectangular shape. In the present embodiment, the guide plate 7 is provided in a direction opposite to the direction of the diversion duct, and does not completely cover the flow area of the intake air, and preferably covers an area smaller than half of the flow cross-sectional area.

As shown in fig. 4, in embodiment 3 of the present invention, one spring 6 is provided, one end is connected to the connecting member between the two vertical edges 51, and the other end is connected to the distal end of the positioning shaft, and the rest of the structure is the same as that of the first embodiment. Under the condition that the size of the check valve body is small, the size and the weight of the connecting rod are also small, a single spring can pull the connecting rod to move, and the spring is adopted to play a role in saving space.

The utility model discloses it is right to combine the working process: under the check valve normal use state, the fuse link fixes the connecting rod in the one end of location axle, and the spring is in tensile state this moment, as shown in fig. 4, normal use state, the utility model discloses a structure does not influence the aperture of valve, can guarantee normal ventilation effect. When fire breaks out, the gas temperature rises to fuse the fuse link, the connecting rod is driven to rotate downwards under the action of the restoring force of the spring, and the transverse edge of the connecting rod finally abuts against the check valve sheet after rotating.

Claims

1. A fireproof guide check valve comprises a double-door valve body (1), wherein a valve plate (2) symmetrical about a vertical beam (10) is arranged in the valve body (1), and the fireproof guide check valve is characterized in that the valve body (1) is arranged at the front end of a turning pipeline, and the valve body (1) further comprises a temperature sensing device and a guide plate (7); the temperature sensing device comprises a spring (6), a positioning shaft (3) arranged on the valve body (1), two L-shaped connecting rods (5) which are symmetrical about a vertical beam (10) and a fuse link (9) for fixing the connecting rods, a gap exists between the temperature sensing device and the valve plate (2), and the temperature sensing device is opened under the action of the spring (6) according to the temperature rise, so that the L-shaped connecting rods (5) are abutted against the valve plate (2); the guide plate (7) is arranged on one side of the valve body (1) and used for guiding the flow direction of gas entering the valve.

2. The fire-proof guide check valve of claim 1, characterized in that the guide plate (7) is arranged on the inner wall of the valve body (1) and comprises a folded edge (72) forming an included angle with the inner wall of the valve body (1), and the inclined direction of the folded edge (72) faces the direction of the diversion pipeline.

3. The fire protection guide check valve of claim 1, wherein the guide plate (7) is a hood-shaped structure provided outside the valve body (1).

4. The fire prevention guide check valve of claim 1, wherein the valve plate (2) is formed by punching and fixing two unit valve plates.

5. The fire prevention guide check valve of claim 1, wherein the L-shaped link (5) comprises a vertical side (51) and a horizontal side (52), one end of the vertical side (51) is connected with the positioning shaft (3) through the fixed shaft (8) so that the link rotates around the fixed shaft (8); one end of the spring (6) is connected with the L-shaped connecting rod (5), and the other end is connected with the far end of the positioning shaft (3).

6. Fire protection guide check valve according to claim 1, characterized in that the positioning shaft (3) is parallel to the vertical beam (10).

7. The fire prevention guide check valve of claim 5, characterized in that the positioning shaft (3) is provided with a fixing device (4), and both ends of the fixing device (4) are respectively connected with the transverse edge (52) through a fuse link (9).

8. The fireproof guiding check valve of claim 1, wherein the valve plate (2) is inclined relative to the side wall of the valve body, and the guiding plate is arranged at one end of the valve plate, which forms an obtuse angle with the side wall of the valve body.

9. The fire prevention guide check valve of claim 8, wherein the transverse edge (52) of the L-shaped link (5) faces the end of the valve plate that forms an acute angle with the side wall of the valve body.

10. Fire protection guide check valve according to claim 1, characterized in that the valve plate (2) is provided with a groove on its periphery.