Fireproof check valve

Abstract

The utility model discloses a fireproof check valve which comprises an outer shell. A housing bracket; two fan blade brackets; two fan blades; the fireproof fan is characterized in that a spring connecting rod is connected between the top ends of the two fan blade supports, a spring is arranged on the spring connecting rod in a sleeving mode, and a fireproof support fixedly installed on the shell support is arranged in the middle of the position between the two fan blades. The side wall of the top end of the fireproof support is provided with a fireproof piece connected with the fireproof support through tin soldering. The spring comprises a first torsional spring and a second torsional spring which are arranged at the two ends of the spring connecting rod in a sleeving mode, and a first stop lever and a second stop lever are connected between the two ends of the first torsional spring and the two ends of the second torsional spring respectively. The fireproof check valve is reasonable in structural design, the spring connecting rod, the spring, the fireproof support and the fireproof piece are additionally arranged on the basis of a traditional check valve, the fireproof check valve is simple in structure, not prone to failure and easy to install, and use cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a fire-proof check valve. 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, and are costly. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides a fire-proof check valve.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a fire-proof check valve, 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;

[0009] It is characterized in that: a spring connecting rod is connected between the top ends of the two fan blade brackets, a spring is sleeved on the spring connecting rod, a fireproof bracket fixedly mounted on the outer shell bracket is provided in the middle part between the two fan blades, and a fireproof sheet connected to the fireproof bracket by soldering is provided on the top side wall of the fireproof bracket; the spring includes a first torsion spring and a second torsion spring sleeved at both ends of the spring connecting rod, and a first baffle rod and a second baffle rod are respectively connected between the two ends of the first torsion spring and the two ends of the second torsion spring.

[0010] In the above structure, the fireproof bracket and the outer shell bracket are connected by rivets.

[0011] In the above structure, the first shift lever, the second shift lever, the first torsion spring and the second torsion spring are an integrally formed structure.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the fireproof check valve of the utility model has a reasonable structural design, and a spring connecting rod, a spring, a fireproof bracket and a fireproof sheet are added on the basis of the traditional check valve. The structure is simple and not easy to fail, the installation is simple, and the use cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a fire-proof check valve according to an embodiment of the utility model;

[0014] Figure 2 It is a structural schematic diagram of a fire-proof check valve according to an embodiment of the utility model without an outer shell and an outer shell bracket;

[0015] Figure 3 It is a reference diagram of the use status of a fire-proof check valve described in an embodiment of the utility model.

[0016] In the figure:

[0017] 1. Outer shell; 2. Outer shell bracket; 3. Fan blade bracket; 4. Fan blade; 5. Spring connecting rod; 6. Spring; 7. Fireproof bracket; 8. Fireproof sheet; 9. First torsion spring; 10. Second torsion spring; 11. First gear lever; 12. Second gear lever. DETAILED DESCRIPTION

[0018] 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.

[0019] like Figure 1-3 As shown, a fire-proof check valve comprises:

[0020] Outer shell 1;

[0021] A housing bracket 2, fixedly connected to the housing body 1;

[0022] Two fan blade brackets 3 are mounted on the housing bracket 2 by screws;

[0023] Two fan blades 4 are hinged between the two fan blade brackets 3;

[0024] It is characterized in that: a spring connecting rod 5 is connected between the top ends of the two fan blade brackets 3, a spring 6 is sleeved on the spring connecting rod 5, a fireproof bracket 7 fixedly mounted on the outer shell bracket 2 is provided in the middle part between the two fan blades 4, and a fireproof sheet 8 connected to the fireproof bracket 7 by soldering is provided on the top side wall; the spring 6 includes a first torsion spring 9 and a second torsion spring 10 sleeved on both ends of the spring connecting rod 5, and a first baffle rod 11 and a second baffle rod 12 are respectively connected between the two ends of the first torsion spring 9 and the two ends of the second torsion spring 10.

[0025] In the above structure, the fireproof bracket 7 and the outer shell bracket 2 are connected by rivets.

[0026] In the above structure, the first shift lever 11, the second shift lever 12, the first torsion spring 9 and the second torsion spring 10 are an integrally formed structure.

[0027] The fire-proof check valve of the utility model is used in a specific way. Figure 3 As shown, first rotate the first stopper to the right around the spring connecting rod and put it on the right side wall of the fireproof sheet, then rotate the second stopper to the right around the spring connecting rod and put it on the left side wall of the fireproof sheet, which will not affect the movement of the fan blades under normal use. When the smoke inside the smoke exhaust pipe reaches 150 degrees, the soldering position on the fireproof sheet on the check valve will melt and become loose, and at the same time, the first stopper and the second stopper will bounce to both sides under the rebound force of the torsion spring to close the fan blades, thereby playing a good role in blocking smoke and fire.

[0028] 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 fire-proof check valve, comprising: An outer shell (1); An outer shell bracket (2) 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); The invention is characterized in that: a spring connecting rod (5) is connected between the top ends of the two blade brackets (3), a spring (6) is sleeved on the spring connecting rod (5), a fireproof bracket (7) fixedly mounted on the shell bracket (2) is provided in the middle part between the two blades (4), and a fireproof sheet (8) connected to the fireproof bracket (7) by soldering is provided on the top side wall of the fireproof bracket (7); the spring (6) includes a first torsion spring (9) and a second torsion spring (10) sleeved on both ends of the spring connecting rod (5), and a first stop rod (11) and a second stop rod (12) are respectively connected between the two ends of the first torsion spring (9) and the two ends of the second torsion spring (10).

2. A fire-proof check valve according to claim 1, characterized in that: The fireproof bracket (7) and the outer shell bracket (2) are connected via rivets.

3. A fire-proof check valve according to claim 1, characterized in that: The first shift rod (11), the second shift rod (12), the first torsion spring (9) and the second torsion spring (10) are an integrally formed structure.

Images