CN103398201B - Y shape valve body screw thread connects high temperature and high pressure cut-off valve - Google Patents

Abstract

The invention relates to the field of stop valves, in particular to a high-temperature and high-pressure stop valve with a Y-shaped valve body threaded connection. It includes a valve body, a valve seat, a valve disc, a valve stem, a valve cover, a sealing mechanism and a gear head. The valve body is divided into an upper valve body and a lower valve body, and the upper valve body and the lower valve body are fixed by bolts and nuts. Connected together, and a sealing ring is installed in the middle; the inlet flow path and the outlet flow path of the Y-shaped valve body threaded connection high-temperature and high-pressure globe valve are an oblique line, and the flow path and the direction of the valve stem form a "Y" shape. The advantage of the present invention is that the Y-shaped valve body is threaded to connect the high-temperature and high-pressure cut-off valve to make up for the problem that the seal is damaged and not easy to be replaced, and the maintenance is convenient; The problem of easy slag accumulation; solve the zero leakage of the valve sealing surface, improve the anti-cavitation and anti-scouring capabilities of the valve disc and valve seat, and improve the overall performance and use of the valve.

Description

Y-shaped valve body threaded connection high temperature and high pressure globe valve

technical field

The invention relates to the field of stop valves, in particular to a high-temperature and high-pressure stop valve with a Y-shaped valve body threaded connection.

Background technique

The traditional globe valve body is integral. There are two main forms of the combination of the valve body and the valve seat; one is that the sealing surface of the valve seat is directly welded on the sealing part of the valve body and processed. Second, according to different media, after the valve seat is made of selected materials, it is fixed on the sealing part of the valve body by expansion, screw connection, pressing, welding and other methods. After these two types of valve seats are damaged, it is difficult to remove them for repair or replace them with new ones. Moreover, the fluid resistance of the traditional globe valve is large, and slag is easy to accumulate at the bend.

Contents of the invention

In order to solve the above problems, the present invention proposes a high-temperature and high-pressure stop valve with a Y-shaped valve body threaded connection, which has reasonable structure, excellent performance, beautiful appearance, and a wide range of applicable pressures. It is mainly used to connect or cut off the medium in the pipeline. It has the advantages of wear resistance, high temperature resistance, good abrasion resistance and long service life.

In order to achieve the above object, the present invention proposes the following technical solutions:

The Y-shaped valve body is threaded to connect the high-temperature and high-pressure globe valve, which includes the valve body, valve seat, valve disc, valve stem, valve cover, sealing mechanism and gear head. The valve disc is installed in the middle of the valve body, and the valve seat is installed under the valve disc. The lower end of the valve stem is connected to the upper end of the disc, the disc cover is pressed on the disc, the sealing mechanism is installed on the upper end of the valve body, the valve cover is screwed on the upper end of the valve body, the valve stem passes through the sealing mechanism, and the upper end of the valve stem is installed on the gear head Among them, the lower end of the gear head is fixed by bolts, the valve body is divided into an upper valve body and a lower valve body, and the upper valve body and the lower valve body are fixedly connected together by bolts and nuts, and a sealing ring is installed in the middle; the Y The inlet flow path and the outlet flow path of the high-temperature and high-pressure globe valve with threaded connection of the shaped valve body are an oblique line, and the flow path and the direction of the valve stem form a "Y" shape. The flow path of the valve body and the main flow path form an oblique line, so that the degree of damage to the flow state is smaller than that of conventional globe valves, so the pressure loss through the valve is correspondingly small.

The sealing mechanism includes a packing chamber, a sealing ring, a packing pad, a packing, a packing pad with holes, a support plate, a split ring, a packing pressure plate, a compression sleeve and a pre-tightening plate. The packing chamber is installed at the upper end of the upper valve body, located Between the valve stem and the upper valve body, the sealing ring is installed on the stuffing chamber, between the stuffing chamber and the valve body, and the packing pad, packing, packing pad with holes and Packing, the pressure sleeve is pressed on the packing, the packing pressure plate is pressed on the pressure sleeve, and is fixedly connected to the support plate through studs and nuts, a pre-tightening plate is designed on the outside of the stuffing chamber on the valve cover, and a support plate is designed on the top of the pre-tightening plate , A split ring is installed between the support plate and the upper end of the stuffing chamber.

The advantage of the present invention is that the Y-shaped valve body is threaded to connect the high-temperature and high-pressure cut-off valve to make up for the problem that the seal is damaged and difficult to replace, and the maintenance is convenient; The problem of easy slag accumulation; solve the zero leakage of the valve sealing surface, improve the anti-cavitation and anti-scouring capabilities of the valve disc and valve seat, and improve the overall performance and use of the valve.

Description of drawings

Figure 1 is a schematic diagram of the present invention.

In the figure: lower valve body 1, valve disc 2, valve disc cover 3, valve stem 4, packing chamber 5, sealing ring 6, valve cover 7, packing pad 8, packing 9, packing pad with holes 10, support plate 11, Split ring 12, stud 13, nut 14, bolt 15, gear head 16, packing pressure plate 17, pressure sleeve 18, pre-tightening plate 19, upper valve body 20, bolt 21, nut 22, sealing ring 23, valve seat twenty four.

detailed description

In order to further illustrate the present invention, introduce below in conjunction with accompanying drawing of description:

Referring to accompanying drawing 1, Y-shaped valve body threaded connection high temperature and high pressure cut-off valve, it comprises valve body, valve seat 24, valve flap 2, valve stem 4, valve cover 7, sealing mechanism and gear head 16, valve flap 2 is contained in the valve In the middle of the body, the valve seat 24 is installed under the valve disc 2, the lower end of the valve stem 4 is connected to the upper end of the valve disc 2, the valve disc cover 7 is pressed on the valve disc 2, the sealing mechanism is installed on the upper end of the valve body, and the valve cover 7 is screwed tightly on the valve body At the upper end, the valve stem 4 passes through the sealing mechanism. The upper end of the valve stem 4 is installed in the gear head 16, and the lower end of the gear head 16 is fixed by bolts 15. The valve body is divided into an upper valve body 20 and a lower valve body 1. The valve body 20 and the lower valve body 1 are fixedly connected together by bolts 21 and nuts 22, and a sealing ring 23 is installed in the middle; Line, and the flow channel and the direction of the valve stem 4 form a "Y" shape.

The sealing mechanism includes a packing chamber 5, a sealing ring 6, a packing pad 8, a packing 9, a packing pad 10 with holes, a support plate 11, a split ring 12, a packing pressure plate 17, a pressure sleeve 18 and a pre-tightening plate 19, The stuffing chamber 5 is installed on the upper end of the upper valve body 20, between the valve stem 4 and the upper valve body 20, the sealing ring 6 is installed on the top of the stuffing chamber 5, between the stuffing chamber 5 and the upper valve body 20, the stuffing chamber 5 and the valve Between the rods 4 there are packing pads 8, packing 9, packing pads with holes 10 and packing 9 from bottom to top. The pressing sleeve 18 is pressed on the packing 9, and the packing pressing plate 17 is pressed on the pressing sleeve 18, and through the stud 13 and nut 14 are fixedly connected on the support plate 11, a pre-tightening plate 19 is designed on the outside of the stuffing chamber 8 above the valve cover 7, a support plate 11 is designed above the pre-tightening plate 19, and a Split ring 12.

Claims (1)

1.Y shape valve body screw thread connect high temperature and high pressure cut-off valve, it include valve body, valve seat, flap, valve rod, valve gap, sealing mechanism and Gearhead, flap is loaded in the middle of valve body, and valve seat is contained in below flap, and valve rod lower end connects flap upper end, and flap is pressed with flap Lid, sealing mechanism is contained in valve body upper end, and valve gap is tightened on valve body upper end, and valve rod passes from sealing mechanism, and valve rod upper end is contained in In gearhead, gearhead lower end is bolted, and it is characterized in that: described valve body is divided into upper valve body and lower valve body, upper valve body It is threaded connection with lower valve body, and connects by screw bolt and nut is fixing, and fill in the middle of bolt threaded There is sealing ring；Outlet passage is positioned on upper valve body, and water inlet flow channel is positioned on lower valve body；The surface of lower valve body is step-like, by going out Mouthful runner is valve seat erecting bed, first step, sealing ring erecting bed, screw bolt and nut erecting bed successively to periphery, wherein first Step is the highest, and the periphery at first step is provided with screw thread, and the threaded engagement of the corresponding part of upper valve body, valve seat erecting bed with go out Mouth runner is equal；Outlet flow is seated on first step；Described Y shape valve body screw thread connects the import of high temperature and high pressure cut-off valve Runner and outlet flow are oblique lines, and runner forms Y-shaped shape with valve rod direction.