Eccentric butterfly valve

Abstract

The utility model relates to the field of butterfly valves, in particular to an eccentric butterfly valve which comprises a valve body, a fixing plate is arranged on the upper portion of the valve body, a handle is rotatably installed on the upper portion of the fixing plate, the rotating end of the handle is connected with a butterfly valve shaft through a first connecting bolt matched with a second positioning pin, and the butterfly valve shaft is rotatably installed in the valve body. A mounting groove is formed in one side of the interior of the butterfly clack shaft, a valve clack is mounted in the mounting groove in a clamped mode, and the valve clack and the butterfly clack shaft are connected through a third positioning pin and a second connecting bolt. According to the butterfly valve, the mounting groove formed in the butterfly clack shaft can be connected with the valve clack in a matched and clamped mode, the connecting stability is guaranteed under the connecting action of the third positioning pin and the second connecting bolt, then the connecting stability of the butterfly clack shaft and the valve clack is guaranteed, the connecting integrity is high, looseness is not prone to occurring, and meanwhile the third sealing ring is arranged on the outer side of the valve clack so that the sealing performance can be guaranteed; and the service life and the on-off performance of the valve body are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to an eccentric butterfly valve. Background Art

[0002] The eccentric butterfly valve is a special type of butterfly valve, and its valve stem axis deviates from both the disc center and the body center at the same time. At present, most traditional butterfly valves require a conical seat to be connected to the butterfly disc, which increases the interference area between the butterfly plate and the valve seat and there is a risk of loosening, reducing the sealing performance. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the prior art and to propose an eccentric butterfly valve.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An eccentric butterfly valve, comprising a valve body, a fixing plate is arranged on the upper part of the valve body, a handle is rotatably installed on the upper part of the fixing plate, the rotating end of the handle is connected to the butterfly disc shaft through a connecting bolt one and a positioning pin two, the butterfly disc shaft is rotatably installed inside the valve body, and an installation groove is opened on one side inside the butterfly disc shaft, a valve flap is clamped and installed in the installation groove, and the valve flap and the butterfly disc shaft are connected through a positioning pin three and a connecting bolt two;

[0006] A plurality of holes are correspondingly opened in the middle parts of the valve flap and the installation groove, and a positioning pin three and a connecting bolt two are respectively connected in the holes. A notch is opened on the outer side of the valve flap, and a sealing ring three is embedded in the notch, and the sealing ring three is in extrusion contact with the inside of the valve body.

[0007] In addition, the preferred structure is that the positioning pin two is horizontally clamped to the connection part of the connecting bolt one and the handle to synchronously lock the connecting bolt one and the handle.

[0008] In addition, the preferred structure is that a positioning pin one is installed on one side of the upper part of the fixing plate.

[0009] In addition, the preferred structure is that a locking bolt is screwed at one end of the handle, and one end of the locking bolt extends out of the bottom wall of the handle and is in extrusion contact with the upper wall of the fixing plate.

[0010] In addition, the preferred structure is that an annular groove is opened on the outer side of the upper part of the butterfly disc shaft, and a sealing ring one is embedded in the annular groove, and a retaining ring is arranged above the sealing ring one.

[0011] In addition, the preferred structure is that a sealing ring two is arranged on the outer side of the valve body.

[0012] In addition, the preferred structure is that a gasket is installed between the connecting bolt one and the butterfly disc shaft.

[0013] The beneficial effects of the present utility model are as follows:

[0014] In the present utility model, the installation groove formed on the butterfly valve shaft can be fitted and clamped with the valve flap, and the connection stability is ensured under the connection action of the positioning pin three and the connecting bolt two, thereby ensuring the connection stability between the two and having high connection integrity, not easily loosening. At the same time, a sealing ring three is arranged on the outer side of the valve flap to ensure the sealing performance, effectively improving the service life and on-off performance of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the external structure of an eccentric butterfly valve proposed by the present utility model;

[0016] Figure 2 is a partial schematic diagram of the internal structure of an eccentric butterfly valve proposed by the present utility model;

[0017] Figure 3 is a sectional view of the internal structure of the valve body proposed by the present utility model;

[0018] Figure 4 is a schematic diagram of the structure at position A proposed by the present utility model;

[0019] Figure 5 is a schematic diagram of the valve flap structure proposed by the present utility model;

[0020] Figure 6 is a schematic diagram of the external structure of the butterfly valve shaft proposed by the present utility model.

[0021] In the figure: 1, valve body; 2, fixing plate; 3, positioning pin one; 4, connecting bolt one; 5, locking bolt; 6, handle; 7, positioning pin two; 8, sealing ring one; 9, sealing ring two; 10, valve flap; 11, sealing ring three; 12, gasket; 13, retaining ring; 14, positioning pin three; 15, connecting bolt two; 16, butterfly valve shaft; 17, installation groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] Referring to Figure 1-6 , an eccentric butterfly valve includes a valve body 1. A fixing plate 2 is arranged on the upper part of the valve body 1. A handle 6 is rotatably installed on the upper part of the fixing plate 2. The rotating end of the handle 6 is connected to the butterfly valve shaft 16 through a connecting bolt one 4 and a positioning pin two 7. The butterfly valve shaft 16 is rotatably installed inside the valve body 1, and an installation groove 17 is formed on one side inside the butterfly valve shaft 16. A valve flap 10 is clamped and installed in the installation groove 17. The valve flap 10 and the butterfly valve shaft 16 are connected through a positioning pin three 14 and a connecting bolt two 15;

[0024] Further, a plurality of holes are correspondingly formed in the middle of the valve flap 10 and the installation groove 17. A positioning pin three 14 and a connecting bolt two 15 are respectively connected in the holes. A notch is formed on the outer side of the valve flap 10, and a sealing ring three 11 is embedded in the notch. The sealing ring three 11 is in extrusion contact with the inner part of the valve body 1.

[0025] Further, the positioning pin two 7 is horizontally clamped to the connection part of the connecting bolt one 4 and the handle 6 to synchronously lock the connecting bolt one 4 and the handle 6.

[0026] Further, a positioning pin one 3 is installed on one side of the upper part of the fixing plate 2. The positioning pin one 3 is installed on the fixing plate 2 to play a limiting role and limit the rotation range of the handle 6.

[0027] Further, a locking bolt 5 is screwed at one end of the handle 6. One end of the locking bolt 5 extends out of the bottom wall of the handle 6 and is in extrusion contact with the upper wall of the fixing plate 2. The locking bolt 5 serves as a safety bolt. When not in use, the locking bolt 5 is rotated to limit the movement of the handle 6 and prevent the handle from freely rotating to cause an uncontrolled situation.

[0028] Further, an annular groove is formed on the outer side of the upper part of the butterfly valve shaft 16. A sealing ring one 8 is embedded in the annular groove, and a retaining ring 13 is arranged above the sealing ring one 8.

[0029] Further, a sealing ring two 9 is arranged on the outer side of the valve body 1.

[0030] Further, a gasket 12 is connected and installed between the connecting bolt one 4 and the butterfly valve shaft 16. The gasket 12 plays a basic anti-vibration and self-locking function.

[0031] In this embodiment, during the installation of the valve body 1, the handle 6 is installed on the fixing plate 2 through the connecting bolt one 4 and is connected to the butterfly valve shaft 16 by means of the positioning pin two 7. At the same time, the valve flap 10 is fitted and clamped into the installation groove 17 formed on the butterfly valve shaft 16, and the two are connected by the positioning pin three 14 and the connecting bolt two 15. At the same time, the handle 6 is rotated to synchronously drive the butterfly valve shaft 16, and the butterfly valve shaft 16 synchronously drives the valve flap 10 to rotate. The medium flowing through the center of the valve body is cut off by relying on the contact between the sealing ring three 11 on the valve flap 10 and the spherical surface of the valve body 1 to achieve the inlet sealing.

[0032] In the present utility model, the installation groove 17 formed on the butterfly valve shaft 16 can be fitted and clamped with the valve flap 10. Under the connection action of the positioning pin three 14 and the connecting bolt two 15, the connection stability is ensured, and further the connection stability and the connection integrity of the two are high and not easy to loosen. At the same time, a sealing ring three 11 is arranged on the outer side of the valve flap 10 to ensure the sealing performance, effectively improving the service life and on-off performance of the valve body.

[0033] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An eccentric butterfly valve, comprising a valve body (1), characterized in that, The upper part of the valve body (1) is provided with a fixing plate (2). The upper part of the fixing plate (2) is rotatably installed with a handle (6). The rotating end of the handle (6) is connected to the butterfly valve shaft (16) through a first connecting bolt (4) and a second positioning pin (7). The butterfly valve shaft (16) is rotatably installed inside the valve body (1), and an installation groove (17) is formed on one side inside the butterfly valve shaft (16). A valve flap (10) is snap-fitted and installed in the installation groove (17). The valve flap (10) and the butterfly valve shaft (16) are connected through a third positioning pin (14) and a second connecting bolt (15). A plurality of holes are correspondingly formed in the middle parts of the valve flap (10) and the installation groove (17). The third positioning pin (14) and the second connecting bolt (15) are respectively connected in the holes. A notch is formed in the outer side of the valve flap (10), and a third sealing ring (11) is embedded in the notch. The third sealing ring (11) is in pressing contact with the inside of the valve body (1).

2. The eccentric butterfly valve according to claim 1, characterized in that, The second positioning pin (7) is horizontally snap-fitted to the connection part of the first connecting bolt (4) and the handle (6) to synchronously lock the first connecting bolt (4) and the handle (6).

3. An eccentric butterfly valve according to claim 1, characterized in that, A first positioning pin (3) is installed on one side of the upper part of the fixing plate (2).

4. An eccentric butterfly valve according to claim 1, characterized in that, One end of the handle (6) is screwed with a locking bolt (5). One end of the locking bolt (5) extends out of the bottom wall of the handle (6) and is in pressing contact with the upper wall of the fixing plate (2).

5. An eccentric butterfly valve according to claim 1, characterized in that, An annular groove is formed on the outer side of the upper part of the butterfly valve shaft (16). A first sealing ring (8) is embedded in the annular groove, and a retaining ring (13) is arranged above the first sealing ring (8).

6. The eccentric butterfly valve according to claim 1, characterized in that, A second sealing ring (9) is arranged on the outer side of the valve body (1).

7. The eccentric butterfly valve according to claim 1, characterized in that, A gasket (12) is installed between the first connecting bolt (4) and the butterfly valve shaft (16).

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