Double-door check valve with fireproof function

Abstract

The utility model discloses a double-door check valve with a fireproof function. The double-door check valve comprises an outer shell; a housing bracket; two fan blade brackets; two fan blades; the top of the shell support is provided with two arc-shaped latch supports which are symmetrically arranged, latch sliding grooves are formed in the side walls of the arc-shaped latch supports, a latch is connected between the two latch sliding grooves, the two ends of the latch are connected with latch springs connected with the arc-shaped latch supports, and the latch springs are connected with the arc-shaped latch supports. A fireproof support is arranged in the middle of the position between the two fan blades, two fireproof pieces are connected to the side wall of the fireproof support in a tin soldering mode, and the door catch is arranged between the two fireproof pieces in a clamped mode. The double-door check valve with the fireproof function is reasonable in structural design, the arc-shaped latch support, the latch, the latch spring, the fireproof support and the fireproof piece are additionally arranged on the basis of a traditional check valve, the double-door check valve is not prone to failure, can resist larger impact force and is easy to install, and the use cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a double-door check valve with fire prevention function. Background Art

[0002] At present, fire-proof check valves are often used in smoke exhaust ducts. However, the fire-proof devices of other check valves on the market have complex structures, have the risk of failure, are difficult to install, are costly, and are not very reliable. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides a double-door check valve with a fire prevention function.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a double-door check valve with fire prevention function, comprising:

[0005] outer shell;

[0006] A housing bracket, fixedly connected to the housing;

[0007] Two fan blade brackets are mounted on the housing bracket by screws;

[0008] Two fan blades are hinged between the two fan blade brackets, and the tops of the fan blades are both provided with inclined planes;

[0009] It is characterized in that: two symmetrically arranged arc-shaped latch brackets are provided on the top of the shell bracket, latch slide grooves are provided on the side walls of the arc-shaped latch bracket, a latch is connected between the two latch slide grooves, latch springs connected to the arc-shaped latch brackets are connected at both ends of the latch, a fireproof bracket is provided in the middle part between the two fan blades, two fireproof plates are connected to the side walls of the fireproof bracket by soldering, and the latch is clamped between the two fireproof plates.

[0010] In the above structure, one end of the latch spring is clamped on the end of the latch, and the other end of the latch spring is clamped on the end of the arc-shaped latch bracket.

[0011] In the above structure, the fireproof bracket and the shell are fixed by rivets.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the double-door check valve with fire prevention function of the utility model has a reasonable structural design, and an arc-shaped latch bracket, a latch, a latch spring, a fire prevention bracket and a fire prevention sheet are added on the basis of the traditional check valve. The structure is simple and not easy to fail, can withstand greater impact force, is easy to install, and greatly reduces the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a double-door check valve with fire protection function described in an embodiment of the utility model;

[0014] Figure 2 It is a structural schematic diagram of an arc-shaped door latch bracket in a double-door check valve with fire protection function described in an embodiment of the utility model;

[0015] Figure 3 It is a structural schematic diagram of a door latch spring in a double-door check valve with fire protection function described in an embodiment of the utility model;

[0016] Figure 4 This is a schematic diagram of the connection structure between a fireproof bracket and a fireproof sheet in a double-door check valve with fireproof function according to an embodiment of the utility model;

[0017] Figure 5 This is one of the structural schematic diagrams of the fan blades in a double-door check valve with fire protection function described in an embodiment of the utility model;

[0018] Figure 6 This is the second structural schematic diagram of the fan blades in a double-door check valve with fire protection function described in an embodiment of the utility model;

[0019] Figure 7 It is a reference diagram of the use status of a double-door check valve with fire protection function described in an embodiment of the utility model.

[0020] In the figure:

[0021] 1. Outer shell; 2. Outer shell bracket; 3. Fan blade bracket; 4. Fan blade; 5. Arc-shaped door latch bracket; 6. Door latch slide groove; 7. Door latch; 8. Door latch spring; 9. Fireproof bracket; 10. Fireproof sheet; 11. Inclined plane. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] like Figure 1-6 As shown, a double-door check valve with fire protection function comprises:

[0024] Outer shell 1;

[0025] A housing bracket 2, fixedly connected to the housing body 1;

[0026] Two fan blade brackets 3 are mounted on the housing bracket 2 by screws;

[0027] Two fan blades 4 are hinged between the two fan blade brackets 3, and an inclined plane 11 is provided on the top of each fan blade 4;

[0028] It is characterized in that: two symmetrically arranged arc-shaped latch brackets 5 are provided on the top of the shell bracket 2, latch slide grooves 6 are provided on the side walls of the arc-shaped latch bracket 5, a latch 7 is connected between the two latch slide grooves 6, latch springs 8 connected to the arc-shaped latch bracket 5 are connected at both ends of the latch 7, a fireproof bracket 9 is provided in the middle part between the two fan blades 4, two fireproof plates 10 are connected to the side walls of the fireproof bracket 9 by soldering, and the latch 7 is clamped between the two fireproof plates 10.

[0029] In the above structure, one end of the latch spring 8 is clamped on the end of the latch 7 , and the other end of the latch spring 8 is clamped on the end of the arc-shaped latch bracket 5 .

[0030] In the above structure, the fireproof bracket 9 and the outer shell bracket 2 are fixed by rivets.

[0031] When the utility model double-door check valve with fireproof function is in operation, the fan blades are first installed, the fireproof sheet and the fireproof bracket are connected by soldering, and then the fireproof bracket and the outer shell bracket are installed together with rivets, and the door latch is placed between the two fireproof sheets, which does not affect the movement of the fan blades under normal use. The fireproof sheet is soldered on the fireproof bracket by two pieces. When the smoke inside the exhaust pipe reaches 150 degrees, the fireproof sheet loosens, and the door latch is placed horizontally above the fan blade under the pulling force of the two door latch springs, closing the fan blade (such as Figure 7 As shown in the figure, due to the effect of the inclined plane of the fan blade, the door latch can tightly close the fan blade, thereby playing a good role in blocking smoke and fire. The structure is simple and not easy to fail, can withstand greater impact force, is easy to install, and greatly reduces the cost of use.

[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 technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A double-door check valve with fire protection function, comprising: An outer shell (1); An outer shell bracket (2) is fixedly connected to the outer shell (1); Two fan blade brackets (3) are mounted on the housing bracket (2) by means of screws; Two fan blades (4) are hinged between the two fan blade brackets (3); It is characterized in that: two symmetrically arranged arc-shaped latch brackets (5) are provided on the top of the shell bracket (2), and latch slide grooves (6) are provided on the side walls of the arc-shaped latch bracket (5), a latch (7) is connected between the two latch slide grooves (6), and latch springs (8) connected to the arc-shaped latch bracket (5) are connected to both ends of the latch (7), a fireproof bracket (9) is provided in the middle part between the two fan blades (4), and two fireproof plates (10) are connected to the side walls of the fireproof bracket (9) by soldering, and the latch (7) is clamped between the two fireproof plates (10).

2. The double-door check valve with fire protection function according to claim 1 is characterized in that: One end of the latch spring (8) is clamped on the end of the latch (7), and the other end of the latch spring (8) is clamped on the end of the arc-shaped latch bracket (5).

3. The double-door check valve with fire protection function according to claim 1 is characterized in that: The fireproof bracket (9) and the outer shell bracket (2) are fixed by rivets.

4. The double-door check valve with fire protection function according to claim 1 is characterized in that: An inclined plane (11) is provided on the top of each fan blade (4).

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