CN111219503A

CN111219503A - Check valve for fire control

Info

Publication number: CN111219503A
Application number: CN202010156321.6A
Authority: CN
Inventors: 谭岩; 王延君
Original assignee: Weifang 100tong Pipeline System Co ltd
Current assignee: Weifang 100tong Pipeline System Co ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-06-02

Abstract

The invention relates to the technical field of valves, and provides a check valve for fire fighting, which comprises a valve body, a valve body and a valve body, wherein the valve body is provided with a water outlet and a water inlet; a valve plate is arranged in the inner cavity of the valve body; the end surface of the valve plate facing the water outlet is provided with a shaft frame plate; the shaft bracket plate is movably connected with the rotating shaft in a penetrating way; two shaft seats are integrally arranged on the valve body, and the shaft seats are provided with through holes; two ends of the rotating shaft are movably sleeved in the through holes; the eccentric distance is formed between the rotating shaft and the circle center of the valve plate; the rotating shaft is also sleeved with a torsional spring for resetting the valve plate; the diameter of one side of the valve plate, which faces the water outlet, is larger than that of one side of the valve plate, which faces the water inlet; a sealing structure is arranged on the outer circumferential surface of the valve plate; the sealing structure and the corresponding position of the inner cavity of the valve body form surface contact sealing. Therefore, the action direction of the valve plate is consistent with the liquid flow direction, and a valve plate structure does not need to be arranged on the valve body, so that the distance between the water outlet and the water inlet is effectively shortened, and the structure of the valve body is simplified; under the same specification, the weight of the structure adopting the invention is reduced by at least 50 percent compared with the prior art.

Description

Check valve for fire control

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a check valve for fire fighting.

Background

The check valve is a valve part commonly used in pipelines, and is a valve of which the opening and closing piece is a circular valve clack and acts by the self weight and the medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards.

The valve body of the existing check valve is basically of a three-way type (such as the structure disclosed in the patent of CN 110792812A); the two ends are respectively provided with a water inlet and a water outlet, and the middle part is provided with a valve core. The action direction of the valve core is vertical to the flow direction of the liquid, so that the valve body needs to be designed with a special structure for placing the valve core, the volume of the valve body is larger, the weight of the whole valve is larger, the processing cost is improved, and the difficulty and the labor intensity of field construction are increased. Especially, when working aloft, the weight of the valve obviously increases the difficulty of the operation.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

Disclosure of Invention

In view of the above-mentioned drawbacks, an object of the present invention is to provide a check valve for fire fighting, which is provided with a valve plate in an inner cavity of a valve body; the valve plate can rotate a tiny angle under the pressure of the water inlet, so that liquid passes through the valve plate, and then the valve plate resets under the action of the torsion spring, so that the unidirectional flow of the liquid is realized. The action direction of the valve plate is consistent with the flow direction of the liquid. Therefore, a valve plate placing structure is not required to be arranged on the valve body independently, and compared with the prior art, the structure of the valve body is greatly simplified; meanwhile, the distance between the water outlet and the water inlet can be greatly shortened. Compared with the prior art, the check valve with the same specification has the advantages that the weight is reduced by at least 50 percent by adopting the structure of the check valve, so that the operation difficulty of field construction, particularly the difficulty of high-altitude operation is greatly reduced.

In order to achieve the above object, the present invention provides a check valve for fire fighting, comprising a valve body having a water outlet and a water inlet; a valve plate is arranged in the inner cavity of the valve body; a shaft frame plate is arranged on the end surface of the valve plate facing the water outlet; the shaft bracket plate is movably connected with the rotating shaft in a penetrating way; the valve body is also integrally provided with two shaft seats, and the shaft seats are provided with through holes; two ends of the rotating shaft are movably sleeved in the through holes; the rotating shaft and the circle center of the valve plate have a preset eccentric distance;

the rotating shaft is also sleeved with a torsion spring for resetting the valve plate; the diameter of one side, facing the water outlet, of the valve plate is larger than that of one side, facing the water inlet, of the valve plate; a sealing structure is arranged on the outer circumferential surface of the valve plate; the sealing structure and the corresponding position of the inner cavity of the valve body form surface contact sealing.

According to the check valve for fire fighting, the inner cavity of the valve body is also provided with a limiting block which is used for abutting against the valve plate to avoid excessive resetting of the valve plate.

According to the fire-fighting check valve, the number of the shaft frame plates is two, and the two shaft frame plates are symmetrically arranged around the circle center of the valve plate.

According to the check valve for fire fighting, the valve plate is also provided with the check block, and a space for installing the torsion spring is formed between the check block and the shaft seat on the corresponding side; the torsion spring is provided with two supporting arms which form an included angle of 90 degrees with each other; a baffle table is arranged in the inner cavity of the valve body; and the two support arms of the torsion spring are respectively abutted against the valve plate and the baffle table.

According to the check valve for fire fighting of the present invention, the through hole is also sealed by a plug.

According to the check valve for fire fighting, one side of the valve plate, which faces the water inlet, is provided with the inwards concave weight removing structure.

According to the check valve for fire fighting, the sealing structure is made of rubber.

According to the check valve for fire fighting, the whole body of the valve plate is coated with the rubber coating layer; the sealing structure is formed on the encapsulating layer; the sealing structure is provided with an inclined plane, and at least two layers of arc-shaped bulges are formed on the inclined plane.

According to the check valve for fire fighting, the sealing structure is a sealing ring sleeved on the outer circumferential surface of the valve plate.

According to the fire-fighting check valve, at least two sealing rings are arranged.

The invention aims to provide a check valve for fire fighting, which is characterized in that a valve plate is arranged in an inner cavity of a valve body; the valve plate can rotate a tiny angle under the pressure of the water inlet, so that liquid passes through the valve plate, and then the valve plate resets under the action of the torsion spring, so that the unidirectional flow of the liquid is realized. The action direction of the valve plate is consistent with the flow direction of the liquid. Therefore, a valve plate placing structure is not required to be arranged on the valve body independently, and compared with the prior art, the structure of the valve body is greatly simplified; meanwhile, the distance between the water outlet and the water inlet can be greatly shortened. Compared with the prior art, the check valve with the same specification has the advantages that the weight is reduced by at least 50 percent by adopting the structure of the check valve, so that the operation difficulty of field construction, particularly the difficulty of high-altitude operation is greatly reduced.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a top view of the valve body of the present invention;

FIG. 4 is a schematic view of the structure of a portion of FIG. 1;

FIG. 5 is a schematic view of the construction of the valve plate of the present invention;

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a schematic structural view of an embodiment of the direction A in FIG. 6;

FIG. 8 is a schematic structural view of an embodiment of the direction A in FIG. 6;

FIG. 9 is a schematic structural view of the torsion spring of the present invention;

FIG. 10 is a schematic structural view of an embodiment of a valve plate of the present invention;

in the figure: 1-a valve body, 11-a shaft seat, 12-a water outlet, 13-a water inlet, 14-a plug, 15-a limiting block and 16-a baffle table; 2-valve plate, 21-rotating shaft, 22-shaft frame plate, 23-shaft hole, 24-stop block, 25-rubber coating layer and 26-sealing ring; 3-torsion spring, 31-support arm.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a check valve for fire fighting, comprising a valve body 1, wherein the valve body 1 is provided with a water outlet 12 and a water inlet 13; a valve plate 2 is arranged in the inner cavity of the valve body 1; referring to fig. 5, a shaft frame plate 22 is arranged on the end surface of the valve plate 2 facing the water outlet 12; the shaft frame plate 22 is provided with a shaft hole for movably connecting the rotating shaft 21 in a penetrating way; the valve body 1 is also integrally provided with two shaft seats 11, and the shaft seats 11 are provided with through holes; two ends of the rotating shaft 21 are movably sleeved in the through holes; the through hole is also sealed by a plug 14; the rotating shaft 21 is also sleeved with a torsion spring 3 for resetting the valve plate 2; with reference to fig. 6, the diameter of the valve plate 2 facing the water outlet 12 is larger than that of the valve plate facing the water inlet 13; the outer circumferential surface of the valve plate 2 is provided with a sealing structure; the sealing structure and the corresponding position of the inner cavity of the valve body 1 form surface contact sealing. The sealing structure of the present invention is preferably made of rubber.

The rotating shaft 21 and the circle center of the valve plate 2 have a certain eccentric distance; the valve plate 2 is rotated at a slight angle around the rotary shaft 21 under the pressure of the water inlet 13, thereby passing the liquid. In order to make the valve plate 2 rotate stably, the number of the shaft bracket plates 22 is two, and the two shaft bracket plates are symmetrically arranged by taking the circle center of the valve plate 2 as a circle center; then, as the pressure difference between the two sides of the valve plate 2 is reduced, the valve plate 2 is reset under the action of the torsion spring 3, so that the liquid backflow is blocked. The eccentricity value can be set by a person skilled in the art according to the specification of the valve body 1 or the requirements of the liquid pressure.

Referring to fig. 3, a limiting block 15 for abutting against the valve plate 2 to prevent the valve plate from being excessively reset is further disposed in the inner cavity of the valve body 1.

Referring to fig. 6, a stop 24 is further disposed on the valve plate 2, and a space for mounting the torsion spring 3 is formed between the stop 24 and the shaft seat 11 on the corresponding side. With reference to fig. 9, the torsion spring 3 of the present invention has two support arms 31 that are angled at 90 ° to each other; referring to fig. 4, a baffle table 16 is arranged in the inner cavity of the valve body 1; the two supporting arms 31 of the torsion spring 3 are respectively abutted against the valve plate 2 and the baffle table 16.

As an example, referring to fig. 7, the sealing structure is a sealing ring 26 sleeved on the outer circumferential surface of the valve plate 2. A ring groove is formed on the outer circumferential surface of the valve plate 2 for fixing the seal ring 26. Referring to fig. 8, preferably, the number of the sealing rings 26 of the present invention is at least two, and each sealing ring 26 is in surface contact with the inner cavity of the valve body 1. According to different specifications of the valve body 1, two, three, 4 or 5 pieces of the valve body can be arranged to form multi-stage sealing. The sealing ring 26 is adopted in the embodiment, so that the maintenance and the replacement are convenient. The valve plate 2 of this embodiment can choose the copper stainless steel for use, avoids rustting.

As an example, referring to fig. 10, the valve plate 2 is coated with an encapsulating layer 25 around the body; the encapsulating layer 25 is provided with the sealing structure. Injecting a sealing material such as rubber through the encapsulating apparatus to form an encapsulating layer 25; the sealing structure is provided with an inclined plane, and an arc-shaped bulge is formed on the inclined plane and is in surface contact with the inner cavity of the valve body 1. Further, the arc-shaped bulges are at least two layers. According to different specifications of the valve body 1, 2-5 layers can be arranged to form multi-stage sealing. Due to the protection effect of the encapsulating layer 25, the valve plate 2 of the embodiment can be made of cast iron with lower cost.

Further, valve plate 2 has the heavy structure of going of indent towards one side of water inlet 13, can effectively reduce the weight of valve plate 2.

The valve plate 2 of the invention is completely arranged in the inner cavity of the valve body 1, and the action direction of the valve plate 2 is consistent with the flow direction of the liquid. Therefore, the valve body 1 is not required to be provided with a structure for placing the valve plate 2 independently, and compared with the prior art, the structure of the valve body 1 is greatly simplified; at the same time, the distance between the water outlet 12 and the water inlet 13 can be greatly shortened. Compared with the prior art, the check valve with the same specification has the advantages that the weight is reduced by at least 50 percent by adopting the structure of the check valve, so that the operation difficulty of field construction, particularly the difficulty of high-altitude operation is greatly reduced.

The valve plate 2 of the invention is arranged in the inner cavity of the valve body 1, and the outer diameter of the valve plate is slightly smaller than the diameter of the water outlet 12. When installed, can be inserted into the cavity from the water outlet 12. The rotating shaft 21 can be inserted into the through hole of the shaft seat 11, and then the torsion spring 3 is put into the water outlet 12, and the sleeve joint with the rotating shaft 21 is manually completed. For the reasons mentioned above, the distance between the water outlet 12 and the water inlet 13 can be greatly shortened, so that the distance between the mounting position of the valve plate 2 and the water outlet 12 is also greatly shortened, and the difficulty of mounting, maintaining and replacing parts is greatly reduced.

The invention can be applied to the field of fire fighting, which stipulates in the standard check valve for fire service of the valve, and the operations of valve maintenance, replacement and the like must be completed without special tools. By taking the installation or replacement of the torsion spring 3 (wearing part) of the valve with small specification (the caliber is 65mm) as an example, the structure of the invention can shorten the distance between the water outlet 12 and the valve plate 2 to within 50mm (the length of less than one finger). One operator can conveniently mount the torsion spring 3 in place by clamping the torsion spring with two fingers. In addition, the matching of the rotating shaft 21 and the shaft frame plate 22 is movably connected, so the installation difficulty of the torsion spring 3 is small. The operation efficiency is greatly improved, the quick replacement is realized, and the quick maintenance and replacement have great significance at the time of emergency. The mounting positions of the shaft bracket plate 22 and the torsion spring 3 are both within the diameter range of the valve plate 2, and a special mounting position does not need to be arranged for the valve body 1, so that the reduction of the volume of the valve body 1 is facilitated.

According to the structure and the working principle, the moving parts of the valve body 1 all complete actions without arranging corresponding sealing structures; the manufacturing cost of the valve body 1 is reduced, and meanwhile, the sealing performance of the valve body 1 is improved. Although the through hole of the shaft seat 11 is a sealing point, the position is a fixed point, and a good sealing effect can be achieved by using the screw plug 14.

In summary, the invention provides a check valve for fire fighting, which is characterized in that a valve plate is arranged in an inner cavity of a valve body; the valve plate can rotate a tiny angle under the pressure of the water inlet, so that liquid passes through the valve plate, and then the valve plate resets under the action of the torsion spring, so that the unidirectional flow of the liquid is realized. The action direction of the valve plate is consistent with the flow direction of the liquid. Therefore, a valve plate placing structure is not required to be arranged on the valve body independently, and compared with the prior art, the structure of the valve body is greatly simplified; meanwhile, the distance between the water outlet and the water inlet can be greatly shortened. Compared with the prior art, the check valve with the same specification has the advantages that the weight is reduced by at least 50 percent by adopting the structure of the check valve, so that the operation difficulty of field construction, particularly the difficulty of high-altitude operation is greatly reduced.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The check valve for fire fighting is characterized by comprising a valve body, wherein the valve body is provided with a water outlet and a water inlet; a valve plate is arranged in the inner cavity of the valve body; a shaft frame plate is arranged on the end surface of the valve plate facing the water outlet; the shaft bracket plate is movably connected with the rotating shaft in a penetrating way; the valve body is also integrally provided with two shaft seats, and the shaft seats are provided with through holes; two ends of the rotating shaft are movably sleeved in the through holes; the rotating shaft and the circle center of the valve plate have a preset eccentric distance;

2. A fire control check valve as recited in claim 1, wherein a stop block is further disposed in the interior cavity of the valve body for abutting against the valve plate to prevent excessive resetting thereof.

3. A fire control check valve as recited in claim 1 wherein said two shaft plates are symmetrically disposed about a center of the valve plate.

4. A fire-fighting check valve as defined in claim 3, wherein a stopper is further provided on the valve plate, and a space for mounting a torsion spring is formed between the stopper and the shaft seat on the corresponding side; the torsion spring is provided with two supporting arms which form an included angle of 90 degrees with each other; a baffle table is arranged in the inner cavity of the valve body; and the two support arms of the torsion spring are respectively abutted against the valve plate and the baffle table.

5. A fire fighting check valve as defined in claim 1, wherein said through hole is further sealed by a plug.

6. A fire control check valve as recited in claim 1 wherein a side of said valve plate facing said water inlet has an inwardly concave de-weighting structure.

7. A fire fighting check valve according to any one of claims 1 to 6, characterized in that the sealing structure is made of rubber.

8. A fire control check valve as set forth in claim 7, wherein the valve plate is coated with an encapsulating layer around the body; the sealing structure is formed on the encapsulating layer; the sealing structure is provided with an inclined plane, and at least two layers of arc-shaped bulges are formed on the inclined plane.

9. The fire fighting check valve according to claim 7, wherein the sealing structure is a packing fitted over an outer circumferential surface of the valve plate.

10. A fire fighting check valve as defined in claim 9, wherein said sealing rings are at least two.