CN205331438U - Novel welded structure's of bellows corrugated tube stop valve for ammonia - Google Patents

Abstract

The utility model belongs to the technical field of stop valves. A bellows stop valve for ammonia with a new type of welded bellows structure, including a valve body, a valve disc and a valve stem. The valve stem is covered with a bellows, and the lower end of the bellows is fixedly connected to the valve disc. The upper part of the valve clack is provided with a step-shaped spigot boss, the lower part of the bellows is provided with a lower flange, and the lower flange is provided with a spigot sink matching the spigot boss; The upper end of the corrugated pipe is provided with an upper flange, and the upper side and the lower side of the upper flange are respectively provided with sealing counters matched with the valve body and the valve cover for sealing and pressing. The utility model has a reasonable structural design, which adopts "burning edge welding" and "sealing welding" to effectively ensure its sealing and strength, and the flange on the bellows is designed with a sealing platform to ensure the effective sealing and life of the gasket; at the same time The upper and lower gasket structures are designed on the upper flange of the bellows to ensure the tightness of the bellows stop valve.

Description

Bellows stop valve for ammonia with new welded structure of bellows

technical field

The utility model belongs to the technical field of cut-off valves, in particular to a bellows cut-off valve for ammonia with a new welded bellows structure.

Background technique

The bellows in the existing ammonia bellows stop valves on the market are all welded on the valve stem, but the ammonia stop valves must be opened and closed quickly and must meet the flow requirements, so an effective opening height must be guaranteed. And it is necessary to ensure that the performance and service life of the bellows are within the effective range. At the same time, liquid ammonia is a high-risk medium, and its sealing performance must be guaranteed during the application of the globe valve.

Utility model content

The purpose of this utility model is to solve the above-mentioned existing problems and deficiencies, and provide an ammonia bellows shut-off valve with a new welded bellows structure with reasonable structure design, long service life and stable sealing performance.

In order to achieve the above purpose, the technical solutions adopted are:

A bellows cut-off valve for ammonia with a new type of welded bellows structure, including a valve body, a valve disc and a valve stem. The valve stem is covered with a bellows, and the lower end of the bellows is fixedly connected with the valve disc. The upper part of the valve clack is provided with a step-shaped spigot boss, the lower part of the bellows is provided with a lower flange, and the lower flange is provided with a spigot sink matching the spigot boss; The upper end of the corrugated pipe is provided with an upper flange, and the upper side and the lower side of the upper flange are respectively provided with sealing counters matched with the valve body and the valve cover for sealing and pressing.

PTFE sealing gaskets are provided on the upper and lower sealing platforms of the upper flange.

The bellows, the upper flange and the lower flange are fixedly welded by edge welding, and the lower flange and the valve disc are fixedly welded by seam welding.

Adopt above-mentioned technical scheme, the beneficial effect that obtains is:

The structure design of the utility model is reasonable. It adopts "burning edge welding" and "sealing welding" to effectively ensure its sealing and strength. The flange on the bellows is designed with a sealing platform to ensure the effective sealing and life of the gasket; at the same time The upper and lower gasket structures are designed on the upper flange of the bellows to ensure the tightness of the bellows globe valve.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the bellows and the valve disc.

Serial numbers in the figure: 1 is the valve body, 2 is the valve disc, 3 is the PTFE sealing gasket, 4 is the bellows, 5 is the spigot boss, 6 is the lower flange, 7 is the slit sinker, 8 is the upper flange , 9 are the sealing platform.

detailed description

The specific embodiment of the utility model is described in detail below in conjunction with accompanying drawing.

Referring to Fig. 1 and Fig. 2, a corrugated pipe shut-off valve for ammonia with a new type of welded bellows structure of the utility model includes a valve body 1, a valve disc 2 and a valve stem, and a bellows 4 is sleeved on the valve stem. The lower end of the bellows 4 is fixedly connected with the valve clack 2, the upper part of the valve clack 2 is provided with a step-shaped notch boss 5, and the lower part of the bellows 4 is provided with a lower flange 6. The blue plate 6 is provided with a spigot sinking platform 7 matching the spigot boss 5; the upper end of the bellows 4 is provided with an upper flange 8, and the upper side and the lower side of the upper flange 8 are respectively provided with The valve body 1 and the valve cover are matched with a sealing platform 9 for sealing and pressing.

PTFE gaskets 3 are provided on the upper and lower sealing platforms 9 of the upper flange 8, and the bellows, the upper flange and the lower flange are fixedly welded by edge welding. , the said lower flange and the disc are fixedly welded by seam welding.

The structure design of the utility model is reasonable. It adopts "burning edge welding" and "sealing welding" to effectively ensure its sealing and strength. The flange on the bellows is designed with a sealing platform to ensure the effective sealing and life of the gasket; at the same time The upper and lower gasket structures are designed on the upper flange of the bellows to ensure the tightness of the bellows globe valve.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description are only the principles of the present invention. Variations and improvements, which fall within the scope of the claimed invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims (3)

1. the ammonia bellows stop valve of a corrugated tube Novel welding structure, it is characterized in that: include valve body, flap and valve rod, described valve rod is arranged with corrugated tube, described corrugated tube lower end is fixing with flap to be connected, described flap top is provided with in step-like seam boss, described corrugated tube bottom is provided with lower flange, and lower flange is provided with the seam heavy stand mated with seam boss；Described corrugated tube upper end is provided with upper flange plate, and the upper side and lower side of upper flange plate is respectively arranged with mates the sealing heavy stand sealing pressing with valve body and valve gap。

2. the ammonia bellows stop valve of corrugated tube Novel welding structure according to claim 1, it is characterised in that: the sealing heavy stand of the upper side and lower side of described upper flange plate is provided with PTFE seal packing ring。

3. the ammonia bellows stop valve of corrugated tube Novel welding structure according to claim 1, it is characterized in that: described corrugated tube is with upper flange plate and lower flange that burning side weld is fixing weld, passes through seam solid welding and surely weld between described lower flange and flap。