Valve with corrugated pipe sealing structure

Abstract

The utility model relates to the field of regulating valves, in particular to a corrugated pipe sealing structure valve which comprises a valve cover, a corrugated pipe valve rod, a connecting disc and a corrugated pipe, the corrugated pipe valve rod, the connecting disc and the corrugated pipe are arranged in the valve cover, the connecting disc is arranged on the upper portion of the corrugated pipe valve rod, the corrugated pipe is sleeved on the periphery of the corrugated pipe valve rod, and the upper end of the corrugated pipe is arranged at the lower end of the connecting disc. And a corrugated pipe nut is arranged at the joint of the corrugated pipe valve rod and the connecting disc and is in threaded connection with the valve cover. The corrugated pipe structure is an independent part and is convenient to replace when damaged, and the cost is reduced; the corrugated pipe nut presses the corrugated pipe to prevent the corrugated pipe from rotating, so that an anti-rotating pin structure is omitted, the cost is reduced, and the service life is prolonged; the corrugated pipe is directly connected with the valve cover, a spacer bush and a support are omitted, the machining, mounting and welding cost is reduced, and the sealing performance is improved; the lower end of the corrugated pipe valve rod is of a threaded structure and is detached separately, the use range is widened, and cost is saved.

Description

Technical Field

[0001] The utility model relates to a regulating valve, in particular to a valve with a bellows sealing structure. Background Art

[0002] This technology improves upon the structure of an existing product. The original structure attached a spacer sleeve to the bellows, and to maintain the bellows' position, a bracket was added. The connecting plate, spacer sleeve, bracket, and bellows were then welded together. Finally, an anti-rotation pin was added to prevent the bellows from rotating and damaging during use. This redundant design resulted in a complex structure, tedious machining and welding steps, and high costs. The large number of parts and leak points also reduced sealing performance, resulting in suboptimal results at a high cost. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the utility model provides a bellows sealing structure valve, which removes the spacer sleeve and bracket in the prior art, and the bellows is directly connected to the valve cover.

[0004] The technical solution of the utility model is a bellows sealing structure valve, including a valve cover and a bellows valve stem, a connecting plate, and a bellows arranged in the valve cover. The connecting plate is arranged on the upper part of the bellows valve stem, the bellows is sleeved on the outer periphery of the bellows valve stem, and the upper end of the bellows is arranged at the lower end of the connecting plate.

[0005] In the above technical solution, a bellows nut is provided at the connection between the bellows valve stem and the connecting plate, and the bellows nut is threadedly connected to the valve cover.

[0006] In the above technical solution, a threaded hole is provided at the bottom end of the bellows valve stem.

[0007] The beneficial effects of the utility model are as follows: the bellows structure is an independent part, which is easy to replace when damaged and reduces costs; the bellows nut presses the bellows to prevent the bellows from rotating, thereby eliminating the anti-rotation structure, reducing costs and extending service life; the bellows is directly connected to the valve cover, eliminating the spacer and bracket, reducing processing, installation and welding costs, and improving sealing; the lower end of the bellows valve stem is a threaded structure, which ensures that the valve is easy to disassemble, so that valves with the same bellows structure can be applied to a variety of valve cores, increasing the scope of use and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic structural diagram of the utility model.

[0009] In the figure: 1. Bellows valve stem; 1-1. Threaded hole; 2. Bellows nut; 2-1. External thread; 3. Connecting plate; 4. Sealing gasket; 5. Bellows; 6. Valve cover; 7. Connecting screw. DETAILED DESCRIPTION

[0010] The present invention will be further described below with reference to the accompanying drawings.

[0011] like Figure 1 As shown, a bellows sealing structure valve includes a bellows valve stem 1, a bellows nut 2, a connecting plate 3, a sealing gasket 4, a bellows and a valve cover 6.

[0012] A threaded hole 1-1 is set at the bottom end of the bellows valve stem 1, the bellows valve stem 1 is inserted into the bellows 5, the connecting plate 3 is pressed on the top of the bellows 5, the top of the bellows 5 is welded to the bottom end of the connecting plate 3, and the bottom end of the bellows 5 is welded to the bottom end of the bellows valve stem 1; the bellows valve stem 1, the connecting plate 3 and the bellows 5 are placed as a whole into the valve cover 6, and the sealing gasket 4 is placed at the connection between the valve cover 6 and the connecting plate 3. The bellows nut 2 is connected to the valve cover 6 through the external thread 2-1 and is tightened to press the connecting plate 3 to seal the bellows as a whole.

[0013] When in use, the threaded hole 1-1 at the lower end of the bellows valve stem 1 is screwed onto the connecting screw 7. The setting of the threaded hole 1-1 ensures that the utility model can be matched with valve cores of different models, thereby improving applicability.

Claims

1. A bellows-sealed valve, characterized in that: The invention comprises a valve cover (6), a bellows valve stem (1), a connecting plate (3), and a bellows (5) arranged in the valve cover (6), wherein the connecting plate (3) is arranged on the upper part of the bellows valve stem (1), the bellows (5) is sleeved on the outer periphery of the bellows valve stem (1), and the upper end of the bellows (5) is arranged on the lower end of the connecting plate (3).

2. A bellows-sealed valve according to claim 1, characterized in that: A bellows nut (2) is provided at the connection between the bellows valve stem (1) and the connecting plate (3), and the bellows nut (2) is threadedly connected to the valve cover (6).

3. The bellows-sealed valve according to claim 1, characterized in that: A threaded hole (1-1) is provided at the bottom end of the bellows valve stem (1).

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