Butterfly valve structure with double valve plates

Abstract

The butterfly valve structure comprises a valve body assembly, a valve element assembly and a connecting valve body, the valve body assembly comprises an upper mounting part, a middle section connecting part and a lower mounting part, a first branch is arranged between the upper mounting part and the middle section connecting part, a second branch is arranged between the middle section connecting part and the lower mounting part, and the first branch is connected with the second branch. The valve element assembly comprises a valve rod rotationally connected with the lower mounting part, two valve plates are arranged on the valve rod and located in the first branch and the second branch respectively, the connecting valve body is provided with a connecting channel, and the two ends of the connecting channel are communicated with the first branch and the second branch respectively. According to the butterfly valve, the valve rod drives the two valve plates to rotate, the first branch and the second branch are communicated or stopped, a double-closure structure is formed, the closure effect is further improved, the situation that a transportation pipeline is stopped due to the fact that a single valve plate is damaged is avoided, and the service life of the butterfly valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a butterfly valve structure with double valve plates. Background Art

[0002] The butterfly valve is composed of a valve shell and a valve body. It has a rotatable disc-shaped or double-plate-shaped valve to cut off the water flow. Its rotation axis is perpendicular to the water flow direction. When the plane of the valve body is perpendicular to the water flow direction, the valve is closed.

[0003] The existing butterfly valve is basically a single valve plate. The problem is that if the valve plate is damaged, a small amount of water leakage will occur, which is difficult to detect. More seriously, it cannot achieve the interception effect, that is, the entire pipeline transportation needs to be stopped, which seriously affects production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a butterfly valve structure with double valve plates, which solves the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a butterfly valve structure with double valve plates, comprising:

[0006] The valve body assembly comprises an upper mounting portion, a middle connecting portion and a lower mounting portion which are sequentially mounted from top to bottom, a first branch passing through both sides of the valve body assembly is arranged between the upper mounting portion and the middle connecting portion, and a second branch passing through both sides of the valve body assembly is arranged between the middle connecting portion and the lower mounting portion;

[0007] The valve core assembly comprises a valve stem which passes through the upper mounting portion and the middle connecting portion from top to bottom in sequence and is rotatably connected to the lower mounting portion. Two valve plates are arranged on the valve stem. The two valve plates are respectively located in the first branch and the second branch, and the valve plates are adapted to the diameters of the first branch and the second branch.

[0008] The connecting valve body is provided with a connecting channel, and two ends of the connecting channel are respectively connected with the first branch and the second branch.

[0009] Preferably, the upper mounting portion, the middle connecting portion and the lower mounting portion are fixedly connected by screws.

[0010] Preferably, a first semicircular groove opening downward is provided at the bottom of the upper mounting portion, and a second semicircular groove opening upward is provided at the top of the middle mounting portion, and the first groove and the second groove form a first branch.

[0011] Preferably, a third groove in a semicircular shape and opening downward is provided at the bottom of the middle mounting portion, and a fourth groove in a semicircular shape and opening upward is provided at the top of the lower mounting portion, and the third groove and the fourth groove form a second branch.

[0012] Preferably, the diameters of the first branch and the second branch are the same.

[0013] Preferably, the connecting channel is in a "]" shape, and the first branch, the connecting channel and the second branch form a "U"-shaped pipeline.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model arranges a valve core assembly, and the first branch, the connecting channel and the second branch form mutually connected pipelines. The two valve plates are respectively located in the first branch and the second branch, and the two valve plates are driven to rotate by the valve stem to realize the connection or cutoff of the first branch and the second branch, forming a double cutoff structure, which further improves the cutoff effect, prevents the transportation pipeline from being shut down due to damage of a single valve plate, and increases the service life of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the first embodiment of the utility model. Figure 2 ;

[0018] Figure 3 It is a partial cross-sectional view of the first embodiment of the utility model;

[0019] Figure 4 It is a cross-sectional view of the first embodiment of the utility model;

[0020] Figure 5 It is a cross-sectional view of the second embodiment of the present utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 4The first embodiment provided by the utility model is a butterfly valve structure with a double valve plate, a valve body assembly 10, a valve core assembly and a connecting valve body 30. The valve body assembly 10 includes an upper mounting portion 11, a middle connecting portion 12 and a lower mounting portion 13 which are sequentially installed from top to bottom. A first branch 14 which runs through both sides of the valve body assembly 10 is arranged between the upper mounting portion 11 and the middle connecting portion 12. A second branch 15 which runs through both sides of the valve body assembly 10 is arranged between the middle connecting portion 12 and the lower mounting portion 13. The connecting valve body 30 is provided with a connecting channel 31. Both ends of the connecting channel 31 are respectively connected to the first branch 14 and the second branch 15. The first branch 14, the connecting channel 31 and the second branch 15 form a pipeline which is interconnected, and the pipeline is used for water flow transportation.

[0023] The valve core assembly includes a valve stem 21 which passes through the upper mounting portion 11 and the middle connecting portion 12 from top to bottom and is rotatably connected to the lower mounting portion 13. Two valve plates 22 are arranged on the valve stem 21. The two valve plates 22 are respectively located in the first branch 14 and the second branch 15, and the valve plates 22 are adapted to the diameters of the first branch 14 and the second branch 15. The valve stem 21 drives the two valve plates 22 to rotate, thereby realizing the connection or interruption of the first branch 14 and the second branch 15, forming a double shut-off structure, further improving the shut-off effect, preventing the transportation pipeline from being shut down due to damage to a single valve plate 22, and improving the service life of the butterfly valve.

[0024] The top of the valve stem 22 can be connected to a manual rotating device or a driving motor device, both of which can drive the valve stem 22 to rotate.

[0025] The upper mounting portion 11 , the middle connecting portion 12 and the lower mounting portion 13 are fixedly connected by screws.

[0026] A first semicircular groove opening downward is provided at the bottom of the upper mounting portion 11, and a second semicircular groove opening upward is provided at the top of the middle mounting portion 12. The first groove and the second groove form a first branch 14. The above structure simplifies the installation steps, simplifies the processing steps, and reduces the production cost.

[0027] A third groove with a semicircular shape and an opening facing downward is provided at the bottom of the middle mounting portion 12, and a fourth groove with a semicircular shape and an opening facing upward is provided at the top of the lower mounting portion 13. The third groove and the fourth groove form a second branch 15. The above structure simplifies the installation steps, simplifies the processing steps, and reduces the production cost.

[0028] The first branch 14 and the second branch 15 have the same diameter.

[0029] The connecting channel 31 is in a "]" shape, and the first branch 11, the connecting channel 31 and the second branch 12 form a "U"-shaped pipeline. The "U"-shaped pipeline can limit the change in water flow direction, reduce the water flow speed, and ensure that the water flow is output at a stable speed.

[0030] Furthermore, when processing the connecting valve body 30, the longitudinal pipeline is first milled out from bottom to top, and then the sealing piece 32 is embedded in the bottom of the longitudinal pipeline, and then a through hole compatible with the first branch 11 and the second branch 12 is milled out from the side end. During milling, part of the sealing piece 32 is also beveled to form a "]"-shaped connecting channel 31.

[0031] See also Figure 5 The second embodiment provided by the utility model is a butterfly valve structure with double valve plates, wherein the valve body assembly 10 comprises an upper mounting portion 11, a middle connecting portion 12 and a lower mounting portion 13 which are sequentially installed from top to bottom, a first branch 14 is arranged between the upper mounting portion 11 and the middle connecting portion 12, a second branch 15 is arranged between the middle connecting portion 12 and the lower mounting portion 13, a connecting valve body 30 is provided with a connecting channel 31, both ends of the connecting channel 31 are respectively connected with the first branch 14 and the second branch 15, the first branch 14, the connecting channel 31 and the second branch 15 form a pipeline which is interconnected, and the pipeline is used for water flow transportation.

[0032] Among them, the first branch 14 and the second branch 15 are right-angle turning channels, and the outer ports of the first branch 14 and the second branch 15 are arranged in opposite directions. This structure can adapt to the overall transportation direction of the pipeline and facilitate pipeline installation.

[0033] Other technical features are the same as those of the first embodiment and will not be described repeatedly.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A butterfly valve structure with double valve plates, characterized in that: include: The valve body assembly comprises an upper mounting portion, a middle connecting portion and a lower mounting portion which are sequentially mounted from top to bottom, a first branch passing through both sides of the valve body assembly is arranged between the upper mounting portion and the middle connecting portion, and a second branch passing through both sides of the valve body assembly is arranged between the middle connecting portion and the lower mounting portion; The valve core assembly comprises a valve stem which passes through the upper mounting portion and the middle connecting portion from top to bottom in sequence and is rotatably connected to the lower mounting portion. Two valve plates are arranged on the valve stem. The two valve plates are respectively located in the first branch and the second branch, and the valve plates are adapted to the diameters of the first branch and the second branch. The connecting valve body is provided with a connecting channel, and two ends of the connecting channel are respectively connected with the first branch and the second branch.

2. A butterfly valve structure with double valve plates according to claim 1, characterized in that: The upper mounting portion, the middle connecting portion and the lower mounting portion are fixedly connected by screws.

3. A butterfly valve structure with double valve plates according to any one of claims 1 or 2, characterized in that: A first groove with a semicircular shape and opening downward is arranged at the bottom of the upper mounting part, and a second groove with a semicircular shape and opening upward is arranged at the top of the middle mounting part. The first groove and the second groove form a first branch.

4. A butterfly valve structure with double valve plates according to any one of claims 1 or 2, characterized in that: A third groove with a semicircular shape and an opening facing downward is arranged at the bottom of the middle mounting portion, and a fourth groove with a semicircular shape and an opening facing upward is arranged at the top of the lower mounting portion. The third groove and the fourth groove form a second branch.

5. The butterfly valve structure with double valve plates according to claim 1, characterized in that: The first branch and the second branch have the same diameter.

6. A butterfly valve structure with double valve plates according to claim 1, characterized in that: The connecting channel is in a "]" shape, and the first branch, the connecting channel and the second branch form a "U"-shaped pipeline.

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