Compact bottom valve

Abstract

A compact type bottom valve comprises a foot valve, a butterfly valve and an outlet flange, a bent pipe flange is arranged at the outlet end of the foot valve, the inlet end and the outlet end of the butterfly valve are fixedly connected with the bent pipe flange and the outlet flange through connecting pieces respectively, a blanking cap is installed at the outlet end of the outlet flange, and a sealing groove is formed in the inlet end face of the butterfly valve. A butterfly valve main seal is installed in the sealing groove, the bent pipe flange is connected with the butterfly valve in a sealing mode through the butterfly valve main seal, and the butterfly valve main seal is in contact with the outer edge of a sealing plate in the butterfly valve in a matched mode. According to the utility model, the defects in the prior art are overcome, the integral rigidity of the valve can be effectively increased, the resistance to external force is improved, and the safety is further improved. In addition, the sealing surface of the whole bottom valve is effectively reduced, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the mechanical field, in particular to valve technology, and specifically to a compact bottom valve. Background Art

[0002] To ensure that the tank does not leak during transportation, the bottom valve of the tank is composed of a three-section valve in series. The connection between the foot valve and the butterfly valve is used as the first sealing structure, the connection between the butterfly valve and the bottom valve outlet is used as the second sealing structure, and the bottom valve outlet and its plugging cover are used as the third sealing structure.

[0003] However, the above tank bottom valve structure requires a flange to be provided at the connection between the foot valve and the butterfly valve, and a sealing surface to be provided at the connection between the two flanges, thereby increasing the flange size and the connecting bolt size. At the same time, due to the large number of sealing surfaces and the complex structure, problems such as sealing surface leakage are prone to occur. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a compact bottom valve, which overcomes the shortcomings of the prior art, can effectively increase the overall rigidity of the valve, improve the resistance to external forces, and thus improve safety. In addition, it also effectively reduces the sealing surface of the entire bottom valve and increases reliability.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A compact bottom valve comprises a foot valve, a butterfly valve and an outlet flange, wherein the outlet end of the foot valve is provided with an elbow flange, the inlet end and the outlet end of the butterfly valve are respectively connected and fixed to the elbow flange and the outlet flange through a connecting piece, and a plugging cover is installed at the outlet end of the outlet flange.

[0007] The inlet end face of the butterfly valve is provided with a sealing groove, in which a main seal of the butterfly valve is installed. The elbow flange and the butterfly valve are sealed and connected via the main seal of the butterfly valve, and the main seal of the butterfly valve is in contact with the outer edge of the sealing plate inside the butterfly valve.

[0008] Preferably, a sealing gasket is provided between the outlet end of the butterfly valve and the outlet flange.

[0009] Preferably, the outlet end of the butterfly valve is provided with a step groove, the front half of the sealing gasket is installed in the step groove, and the rear half of the outer circumferential surface of the sealing gasket is provided with a metal ring, and the metal ring is clamped between the outlet end face of the butterfly valve and the end face of the outlet flange.

[0010] Preferably, the butterfly valve includes a valve body, a sealing plate is provided in the inner cavity of the valve body, one end of the upper main shaft is fixedly connected to the upper side surface of the sealing plate through a gear hole, the other end of the upper main shaft passes through the valve body and is fixedly connected to a butterfly handle through a gear shaft, an eccentric plate is connected to the upper side of the gear shaft through a fixing bolt, the eccentric plate is connected to one end of the handle, and the other end of the handle is located below the butterfly handle and cooperates with the butterfly handle.

[0011] The utility model provides a compact bottom valve. It has the following beneficial effects: the inlet and outlet ends of the butterfly valve are directly connected to the elbow flange and the outlet flange respectively by metal-to-metal connection through the connecting piece, thereby increasing the overall rigidity of the valve, improving the resistance to external forces, and then improving safety. In addition, by installing the main seal of the butterfly valve on the inlet end face of the butterfly valve, the butterfly valve and the elbow flange can be sealed by the main seal of the butterfly valve, and the sealing performance of the sealing plate of the butterfly valve itself is also responsible. Thereby effectively reducing the sealing surface of the entire bottom valve and increasing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the butterfly valve in the utility model;

[0017] Figure 5 It is a top view of the utility model;

[0018] Description of the numbers in the figure:

[0019] 1. Foot valve; 2. Butterfly valve; 3. Outlet flange; 4. Elbow flange; 5. Connectors; 6. Butterfly valve main seal; 7. Sealing gasket; 8. Step notch; 9. Metal ferrule; 10. Plug cover; 21. Valve body; 22. Closing plate; 23. Upper main shaft; 24. Gear shaft; 25. Butterfly handle; 26. Fixing bolt; 27. Eccentric plate; 28. Handle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0021] Embodiment 1, as Figures 1 to 5 As shown, a compact foot valve comprises a foot valve 1, a butterfly valve 2 and an outlet flange 3. The outlet end of the foot valve 1 is provided with an elbow flange 4. The inlet end and the outlet end of the butterfly valve 2 are respectively connected and fixed to the elbow flange 4 and the outlet flange 3 through a connecting piece 5. In this embodiment, the connecting piece 5 is composed of a connecting bolt, a spring washer and a nut. The outlet end of the outlet flange 3 is provided with a plug cover 10.

[0022] The inlet end face of the butterfly valve 2 is provided with a sealing groove, in which a butterfly valve main seal 6 is installed. The elbow flange 4 and the butterfly valve 2 are sealed and connected via the butterfly valve main seal 6, and the butterfly valve main seal 6 is in contact with the outer edge of the sealing plate inside the butterfly valve 2.

[0023] Working principle:

[0024] First, the inlet and outlet ends of the butterfly valve 2 are directly connected to the elbow flange 4 and the outlet flange 3 respectively by metal-to-metal connection through the connecting piece 5, thereby increasing the overall rigidity of the valve, improving the resistance to external forces, and then improving safety.

[0025] In addition, by installing the main seal 6 of the butterfly valve on the inlet end face of the butterfly valve 2, the butterfly valve 2 and the elbow flange 4 can be sealed by the main seal 6 of the butterfly valve, and the sealing performance of the sealing plate of the butterfly valve 2 itself is also ensured. Thereby, the sealing surface of the entire bottom valve is effectively reduced, and the reliability is increased. And by setting a sealing groove on the inlet end face of the butterfly valve 2, the main seal 6 of the butterfly valve is clamped and fixed in the sealing groove, thereby reducing the creep space of the seal and effectively extending the service life of the seal.

[0026] Embodiment 2, as a further preferred embodiment of embodiment 1, a sealing gasket 7 is provided between the outlet end of the butterfly valve 2 and the outlet flange 3. In this embodiment, a step notch 8 is provided at the outlet end of the butterfly valve 2, the front half of the sealing gasket 7 is installed in the step notch 8, and the rear half of the outer circumferential surface of the sealing gasket 7 is provided with a metal ferrule 9, which is sandwiched between the outlet end face of the butterfly valve 2 and the end face of the outlet flange 3, so that the butterfly valve 2 and the outlet flange 3 are connected by metal to metal, so as to further increase the overall rigidity of the valve. The sealing gasket 7 can achieve a sealing effect between the outlet end face of the butterfly valve 2 and the end face of the outlet flange 3; in addition, the metal ferrule 9 is provided to wrap the outer periphery of the sealing gasket 7, so as to effectively avoid the sealing gasket 7 from contacting with the outside world, thereby preventing the sealing gasket 7 from being damaged by the outside world, and thus improving the service life of the sealing gasket 7.

[0027] Embodiment 3, as a further preferred embodiment of embodiment 1, the butterfly valve 2 comprises a valve body 21, a sealing plate 22 is provided in the inner cavity of the valve body 21, one end of the upper main shaft 23 is fixedly connected to the upper side surface of the sealing plate 22 through a gear hole, the other end of the upper main shaft 23 passes through the valve body 21 and is fixedly connected to a butterfly handle 25 through a gear shaft 24, an eccentric plate 27 is connected to the upper side of the gear shaft 24 through a fixing bolt 26, the eccentric plate 27 is connected to one end of a handle 28, the other end of the handle 28 is located below the butterfly handle 25 and matches the butterfly handle 25. The eccentric plate 27 makes the handle 28 adopt an eccentric structure, thereby effectively increasing the gap with the large tank head for easy operation.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compact foot valve, comprising a foot valve (1), a butterfly valve (2) and an outlet flange (3), characterized in that: The outlet end of the foot valve (1) is provided with an elbow flange (4), the inlet end and the outlet end of the butterfly valve (2) are respectively connected and fixed to the elbow flange (4) and the outlet flange (3) via a connecting piece (5), and the outlet end of the outlet flange (3) is provided with a plug cover (10). The inlet end face of the butterfly valve (2) is provided with a sealing groove, in which a butterfly valve main seal (6) is installed, and the elbow flange (4) and the butterfly valve (2) are sealedly connected via the butterfly valve main seal (6), and the butterfly valve main seal (6) is in contact with the outer edge of a sealing plate inside the butterfly valve (2).

2. A compact bottom valve according to claim 1, characterized in that: A sealing gasket (7) is provided between the outlet end of the butterfly valve (2) and the outlet flange (3).

3. A compact bottom valve according to claim 2, characterized in that: The outlet end of the butterfly valve (2) is provided with a stepped notch (8), the front half of the sealing gasket (7) is installed in the stepped notch (8), and the rear half of the outer circumferential surface of the sealing gasket (7) is provided with a metal ferrule (9), and the metal ferrule (9) is sandwiched between the outlet end face of the butterfly valve (2) and the end face of the outlet flange (3).

4. A compact bottom valve according to claim 1, characterized in that: The butterfly valve (2) comprises a valve body (21), the inner cavity of the valve body (21) is provided with a sealing plate (22), the upper side surface of the sealing plate (22) is fixedly connected to one end of an upper main shaft (23) through a gear hole, the other end of the upper main shaft (23) passes through the valve body (21) and is fixedly connected to a butterfly handle (25) through a gear shaft (24), the upper side of the gear shaft (24) is connected to an eccentric plate (27) through a fixing bolt (26), the eccentric plate (27) is connected to one end of a handle (28), and the other end of the handle (28) is located below the butterfly handle (25) and matches the butterfly handle (25).

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