Fireproof check valve

Abstract

The utility model relates to the technical field of check valves, and discloses a fireproof check valve, which comprises a valve body, a sleeve, a middle cylinder and a valve head, the valve body is fixedly connected in the sleeve, the middle cylinder is sleeved on the sleeve, and the valve head is sleeved on the middle cylinder; a first air outlet is formed in the valve body, a first valve plate group is hinged to the first air outlet, a self-locking device is arranged outside the first valve plate group, and the self-locking device is movably connected to the valve body; a second air outlet is formed in the middle cylinder, and a second valve block set is hinged to the second air outlet. The valve plate groups are respectively arranged on the valve body and the middle cylinder to carry out fireproof non-return partition, the two valve plate groups are sealed through the separation blade and the elastic element, the fireproof performance is good, the structure is simple and effective, meanwhile, the valve head can be freely sleeved on the sleeve or the middle cylinder through the uniform size, and the replacement is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a fireproof check valve. Background Art

[0002] In the existing technology, most domestic flue check valves are made of plastic materials. Such check valves basically have no fireproof structure, and the body itself is not fireproof. Some manufacturers also use metal materials with fireproof structures, but most of these check valves use single-blade structures. In the main and auxiliary flue environments, the exhaust resistance of the range hood is very large, which is not conducive to exhaust. Moreover, its fireproof check structure cannot effectively resist smoke backflow, and its fireproof performance is insufficient. Utility Model Content

[0003] The purpose of the utility model is to provide a fire-proof check valve to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A fireproof check valve comprises a valve body, a sleeve, a middle cylinder and a valve head, wherein the valve body is fixedly connected in the sleeve, the middle cylinder is sleeved on the sleeve, and the valve head is sleeved on the middle cylinder; the valve body is provided with a first air outlet, a first valve plate group is hinged on the first air outlet, a self-locking device is provided outside the first valve plate group, and the self-locking device is movably connected to the valve body; the middle cylinder is provided with a second air outlet, a second valve plate group is hinged on the second air outlet.

[0006] In the above technical solution, the self-locking device includes an annular positioning block and a baffle, the annular positioning block is bolted to the valve body, a slide groove is provided on the annular positioning block, one end of the baffle is axially connected to the valve body, and the other end of the baffle is inserted into the slide groove, and the baffle is arranged on the movable side of the first valve plate group and is attached to it.

[0007] In the above technical solution, a limiting column is provided on the annular positioning block, a buckle is provided on the movable end of the blocking piece, and the limiting column and the buckle are arranged at opposite positions.

[0008] In the above technical solution, a passage groove is provided on the baffle.

[0009] In the above technical solution, a first vertical beam is provided on the valve body, and the first valve plate group is hinged on the first vertical beam.

[0010] In the above technical solution, a second vertical beam is provided on the middle cylinder, and the second valve plate group is hinged on the second vertical beam.

[0011] In the above technical solution, a fixing column is provided on the second vertical beam, an elastic element is provided on the fixing column, and the elastic element is against the second valve plate group.

[0012] In the above technical solution, the sleeve is provided with a first step, and the middle sleeve is sleeved on the first step.

[0013] In the above technical solution, a second step is provided on the middle tube, and the valve head sleeve is provided on the second step.

[0014] In the above technical solution, the outer diameter of the first step is the same as the outer diameter of the second step, the inner diameter of the middle tube connecting end is the same as the inner diameter of the valve head connecting section, and the valve head can also be sleeved on the first step.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model performs fire-proof non-return partition by respectively arranging valve plate groups on the valve body and the middle cylinder, and performs sealing operation on the two valve plate groups through baffle plates and elastic elements. It has good fire-proof performance and a simple and effective structure. At the same time, through unified size, the valve head can be arbitrarily fitted on the sleeve or the middle cylinder, and replacement is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the split structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the split structure of the utility model from another angle.

[0019] Reference numerals:

[0020] 1. valve body, 11. first air outlet, 12. first valve plate group, 13. self-locking device, 14. annular positioning block, 141. slide groove, 15. baffle plate, 151. passage groove, 16. limiting column, 17. buckle, 18. first vertical beam;

[0021] 2. Sleeve, 21. First step;

[0022] 3. middle tube, 31. second air outlet, 32. second valve plate group, 33. second vertical beam, 34. fixed column, 35. elastic element, 36. second step;

[0023] 4. Valve head. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meanings of "several" and "multiple" are two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] like Figure 1-3As shown, a fire check valve implemented by the utility model comprises a valve body 1, a sleeve 2, a middle cylinder 3 and a valve head 4, wherein the valve body 1 is fixedly connected in the sleeve 2, the middle cylinder 3 is sleeved on the sleeve 2, and the valve head 4 is sleeved on the middle cylinder 3; the valve body 1 is provided with a first air outlet 11, a first valve plate group 12 is hinged on the first air outlet 11, a self-locking device 13 is provided outside the first valve plate group 12, and the self-locking device 13 is movably connected to the valve body 1; the middle cylinder 3 is provided with a second air outlet 31, a second valve plate group 32 is hinged on the second air outlet 31. The first valve plate group 12 and the second valve plate group 32 are both composed of two semicircular valve plates symmetrical to each other. When ventilation is conducted in the flue, the two hinged valve plates are opened, and the self-locking device 13 outside the first valve plate group 12 can also be opened by the valve plates to allow gas to circulate.

[0027] Furthermore, the self-locking device 13 includes an annular positioning block 14 and a baffle 15, the annular positioning block 14 is bolted to the valve body 1, a slide groove 141 is provided on the annular positioning block 14, one end of the baffle 15 is axially connected to the valve body 1, and the other end of the baffle 15 is inserted into the slide groove 141, and the baffle 15 is provided on the movable side of the first valve plate group 12 and is attached thereto. As shown in the figure, the first valve plate group 12 is inclined toward the side close to the middle tube 3, the annular positioning block 14 is set at the upper half of the first air outlet 11, and the baffle 15 is axially connected to the lower end of the first air outlet 11, and can slide and rotate along the slide groove 141 around the rotating shaft. When the airflow flows from one side of the middle tube 3 to the smoke exhaust duct, the first valve plate group 12 is blown up and closed by the airflow, and at the same time pushes the baffle 15 to move closer to the middle. When the exhaust stops, the baffle 15 can slide to the left and right sides driven by its own gravity, and at the same time close the first valve plate group 12 on the first air outlet 11.

[0028] Furthermore, a limiting column 16 is provided on the annular positioning block 14, and a buckle 17 is provided at the movable end of the baffle 15, and the limiting column 16 and the buckle 17 are arranged opposite to each other. The limiting column 16 is arranged in the middle of the annular positioning block 14, and the buckle 17 can be stopped by the limiting column 16 when the baffle 15 slides to the middle position of the annular positioning block 14.

[0029] Furthermore, a passage groove 151 is provided on the baffle 15. The annular positioning block 14 is connected to the valve body 1 by bolts, so there is a protruding bolt head on its surface. In order to avoid the position of the bolt head so that the baffle 15 can slide smoothly, a corresponding passage groove 151 is provided on the baffle 15.

[0030] Furthermore, the valve body 1 is provided with a first vertical beam 18, and the first valve plate group 12 is hinged on the first vertical beam 18. The two semicircular valve plates of the first valve plate group 12 can rotate around the first vertical beam 18, and each valve plate of the first valve plate group 12 is provided with a sealing rubber ring to seal the first air outlet 11.

[0031] Furthermore, the middle tube 3 is provided with a second vertical beam 33, and the second valve plate group 32 is hinged on the second vertical beam 33. The two semicircular valve plates of the second valve plate group 32 can rotate around the second vertical beam 33, and each valve plate of the second valve plate group 32 is provided with a sealing rubber ring to seal the second air outlet 31.

[0032] Furthermore, a fixing column 34 is provided on the second vertical beam 33, and an elastic element 35 is provided on the fixing column 34, and the elastic element 35 abuts against the second valve plate group 32. In this embodiment, two fixing columns 34 are provided on the second vertical beam 33, and an elastic element 35 is provided between the fixing columns 34. The elastic element 35 is a torsion spring, and the two extended ends of the torsion spring are respectively pressed against the two semicircular valve plates of the second valve plate group 32 to perform a sealing process.

[0033] Furthermore, the sleeve 2 is provided with a first step 21 , and the middle cylinder 3 is sleeved on the first step 21 .

[0034] Furthermore, the middle tube 3 is provided with a second step 36 , and the valve head 4 is sleeved on the second step 36 .

[0035] Furthermore, the outer diameter of the first step 21 is the same as the outer diameter of the second step 36, the inner diameter of the connecting end of the middle cylinder 3 is the same as the inner diameter of the connecting section of the valve head 4, and the valve head 4 can also be sleeved on the first step 21. In this embodiment, the valve body 1 and the middle cylinder 3 can be used at the same time for fireproof sealing, or the middle cylinder 3 can be removed, the valve head 4 can be directly sleeved on the sleeve 2, and only the first valve plate group 12 in the valve body 1 can be used for sealing.

[0036] When using the utility model, the specific operation process is as follows: when the sleeve 2 is fixed on the ventilation flue, the middle tube 3 is sleeved on the first step 21, the valve head 4 is sleeved on the second step 36 of the middle tube 3, and the exhaust fan can be installed on the valve head 4. When the exhaust fan works normally, the airflow fills the second air outlet 31 and the first air outlet 11 in turn and flows into the flue, the second valve plate group 32 and the first valve plate group 12 are lifted by the airflow, and the baffle 15 of the self-locking device 13 is also pushed to the middle position by the first valve plate group 12. When the exhaust fan stops working, the second valve plate group 32 is fixed on the second air outlet 31 more than the elastic element 35, and the baffle 15 also slides down twice to the left and right along the slide groove 141 under its own gravity, and fixes the first valve plate group 12 on the first air outlet 11, so as to achieve a sealing effect. The continuous two-way sealing barrier can achieve a good fire-proof check effect.

[0037] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fire check valve, characterized in that: include: A valve body, a sleeve, a middle cylinder and a valve head, the valve body is fixedly connected in the sleeve, the middle cylinder is sleeved on the sleeve, and the valve head is sleeved on the middle cylinder; the valve body is provided with a first air outlet, a first valve plate group is hinged on the first air outlet, a self-locking device is provided outside the first valve plate group, and the self-locking device is movably connected to the valve body; the middle cylinder is provided with a second air outlet, a second valve plate group is hinged on the second air outlet.

2. A fire-proof check valve according to claim 1, characterized in that: The self-locking device includes an annular positioning block and a baffle, the annular positioning block is bolted to the valve body, a slide groove is provided on the annular positioning block, one end of the baffle is axially connected to the valve body, and the other end of the baffle is inserted into the slide groove, and the baffle is arranged on the movable side of the first valve plate group and is attached to it.

3. A fire-proof check valve according to claim 2, characterized in that: The annular positioning block is provided with a limiting column, the movable end of the blocking piece is provided with a buckle, and the limiting column is arranged opposite to the buckle.

4. A fire-proof check valve according to claim 3, characterized in that: The blocking piece is provided with a passing groove.

5. A fire-proof check valve according to claim 1, characterized in that: The valve body is provided with a first vertical beam, and the first valve plate group is hinged on the first vertical beam.

6. A fire-proof check valve according to claim 1, characterized in that: The middle tube is provided with a second vertical beam, and the second valve plate group is hinged on the second vertical beam.

7. A fire-proof check valve according to claim 6, characterized in that: A fixing column is disposed on the second vertical beam, and an elastic element is disposed on the fixing column. The elastic element abuts against the second valve plate group.

8. The fireproof check valve according to claim 1, characterized in that: The sleeve is provided with a first step, and the middle sleeve is sleeved on the first step.

9. A fire-proof check valve according to claim 8, characterized in that: The middle tube is provided with a second step, and the valve head sleeve is arranged on the second step.

10. A fire-proof check valve according to claim 9, characterized in that: The outer diameter of the first step is the same as the outer diameter of the second step, the inner diameter of the middle tube connecting end is the same as the inner diameter of the valve head connecting section, and the valve head can also be sleeved on the first step.

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