CN205479405U - Ripple stop valve - Google Patents

Abstract

The utility model relates to a corrugated cut-off valve, which comprises a valve body in which a valve stem is installed, the upper end of the valve body is installed with a seamless steel pipe and a tray located on the outer peripheral side of the valve stem through a fixing seat, and the upper end of the seamless steel pipe is installed with a The valve cover, packing gland and packing pad are placed on the outer peripheral side of the valve stem. The gap between the packing gland and the packing pad is filled with packing. The lower end of the valve stem is equipped with a valve disc, a valve disc cover and a guide seat from bottom to top. A first bellows sleeved on the valve stem is installed between the guide seat and the tray. Sealing rings are installed at the upper and lower ends of the first bellows. The upper end of the valve stem is equipped with a hand wheel and a stem nut. The tray An annular sealing ring is installed on the lower surface of the first bellows, and the annular sealing ring is combined with the sealing ring to form a sealing pair; the upper sleeve of the valve stem between the tray and the valve cover There is a second bellows.

Description

A bellows cut-off valve

technical field

The utility model relates to the technical field of valves, in particular to a corrugated cut-off valve.

Background technique

The globe valve used in the existing pipeline, because of many leakage points, the medium in the pipeline often leaks out, and its service life is short, especially once the toxic medium leaks out, it will cause immeasurable losses.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the applicant conducts research and improvement to provide a corrugated cut-off valve with good sealing effect and safe and reliable use.

The utility model adopts following scheme:

A corrugated cut-off valve, including a valve body, a valve stem is installed in the valve body, a seamless steel pipe and a tray on the outer peripheral side of the valve stem are installed on the upper end of the valve body through a fixing seat, and a valve stem is installed on the upper end of the seamless steel pipe. The valve cover, packing gland, packing pressure plate and packing pad on the outer peripheral side are filled with packing between the packing gland and the packing pad, and the valve disc, valve disc cover and guide seat are installed from bottom to top on the lower end of the valve stem. A first bellows sleeved on the valve stem is installed between the seat and the tray, sealing rings are installed at the upper and lower ends of the first bellows, and a hand wheel and a stem nut are installed on the upper end of the valve stem. An annular sealing ring is installed on the lower surface, and the annular sealing ring is placed on the outer periphery of the first bellows. The annular sealing ring and the sealing ring are combined to form a sealing pair; the valve stem between the tray and the valve cover is sleeved There is a second bellows.

The technical effect of the utility model is:

The utility model is provided with a first bellows to form a first seal, and after the valve is fully opened, the annular seal ring and the seal ring form a seal pair, thereby forming two seals; a second seal is provided between the tray and the valve cover. Bellows, even if the first two seals fail, the second bellows can prevent liquid from leaking upward along the valve stem, and the sealing effect is reliable.

Description of drawings

Fig. 1 is the main sectional view of the utility model.

In the figure: 1. Valve body; 2. Disc; 3. Disc cover; 4. Valve stem; 5. First bellows; 6. Tray; 7. Guide seat; 8. Fixed seat; 9. Annular sealing ring ;10, sealing ring; 11, the second bellows; 12, seamless steel pipe; 13, valve cover; 14, packing pad; 15, packing; 16, packing gland; 17, packing pressure plate; , Stem nut.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model will be further described.

As shown in Figure 1, a bellows cut-off valve in this embodiment includes a valve body 1, a valve flap 2, a valve flap cover 3, a valve stem 4, a first bellows 5, a tray 6, a guide seat 7, a fixing seat 8. Annular sealing ring 9, sealing ring 10, second bellows 11, seamless steel pipe 12, valve cover 13, packing pad 14, packing 15, packing gland 16, packing pressure plate 17, hand wheel 18 and stem nut 19 , the center of the valve body 1 is provided with a disc 2, the upper end of the valve disc 2 is provided with a disc cover 3, the lower end of the valve stem 4 is provided in the valve disc 2, the upper end of the valve body 1 is provided with a tray 6, and the upper end of the tray 6 is provided There is a fixed seat 8, the valve body 1, the tray 6 and the fixed seat 8 are connected by bolts and nuts, the lower end of the tray 6 is welded with a first bellows 5, the lower end of the first bellows 5 is welded with a guide seat 7, and the guide seat 7 is welded Fixed on the valve stem 4, the lower end surface of the tray 6 is connected with an annular sealing ring 9, the annular sealing ring 9 is arranged on the outer periphery of the first bellows 5, the upper end surface of the guide seat 7 is provided with a sealing ring 10, the annular sealing ring 9 and the sealing The rings 10 are combined to form a sealing pair, the fixed seat 8 is welded to fix the seamless steel pipe 12, the upper end of the seamless steel pipe 12 is welded to the valve cover 13, the upper end of the tray 6 is welded with the second bellows 11, the first bellows 5 and the second The bellows 11 are all worn on the valve stem 4, the upper end of the second bellows 11 is welded and fixed on the lower end surface of the valve cover 13, a packing 14 is arranged between the valve cover 13 and the valve stem 4, and a packing pad is arranged at the bottom of the packing 14 15. The top of the packing 14 is provided with a packing gland 16, and the upper end of the packing gland 16 is provided with a packing pressure plate 17, and a number of matching swing bolts and nuts are evenly distributed on the packing pressure plate 17, and the lower ends of the swing bolts are connected with cylindrical pins, and the valve stem 4. A valve stem nut 18 is provided at the upper end, and a hand wheel 19 is provided at the lower end of the valve stem nut 18.

The above-mentioned embodiments are preferred implementation modes of the present utility model, which are only used to facilitate the description of the present utility model, and are not intended to limit the present utility model in any form. Anyone with ordinary knowledge in the technical field, if they do not depart from this utility model Within the scope of the technical features mentioned in the utility model, the equivalent embodiments that make partial changes or modifications using the technical content disclosed in the utility model, and do not deviate from the technical features of the utility model, still belong to the technical features of the utility model within range.

Claims (1)

1. A corrugated cut-off valve, including a valve body (1), a valve stem (4) is installed in the valve body (1), and the upper end of the valve body (1) is installed with a valve stem (4) through a fixed seat (8). The seamless steel pipe (12) and the tray (6) on the outer peripheral side, the upper end of the seamless steel pipe (12) is equipped with a valve cover (13), a packing gland (16), and a packing pressure plate placed on the outer peripheral side of the valve stem (4). (17) and the packing pad (14), the packing (15) is filled between the packing gland (16) and the packing pad (14), and the valve disc (2) arranged from bottom to top is installed at the lower end of the valve stem (4). , Disc cover (3) and guide seat (7), between the guide seat (7) and the tray (6) is installed the first bellows (5) sleeved on the valve stem (4), the first bellows The upper and lower ends of (5) are equipped with sealing rings (10), and the upper end of the valve stem (4) is equipped with a hand wheel (18) and a valve stem nut (19), which is characterized in that: the lower part of the tray (6) An annular sealing ring (9) is installed on the surface, and the annular sealing ring (9) is placed on the outer periphery of the first bellows (5), and the annular sealing ring (9) is combined with the sealing ring (10) to form a sealing pair; A second bellows (11) is sheathed on the valve stem (4) between the tray (6) and the valve cover (13).