CN204437296U - Embedded forging Y type is without bonnet stop valve - Google Patents

Abstract

The utility model discloses an embedded forged Y-type non-bonnet stop valve, which comprises a valve body, a valve stem and a hand wheel device. Y-shaped pipe, the feed pipe is connected to the side of the lower end of the valve stem installation pipe, the discharge pipe is connected to the bottom of the valve stem installation pipe, the bottom of the valve stem installation pipe is recessed downward to form a valve seat, and the valve seat is provided with a sealing valve; The valve stem is set in the valve stem installation pipe, the valve stem valve head is provided with a valve core assembly, the valve core assembly includes a fixed sleeve wrapping the valve head, and a rounded truncated valve core set at the lower end of the fixed sleeve; the handwheel device is set on the valve stem. upper part. The integrated forging and disassembly of the utility model is simple and convenient, and the valve body and the sealing valve are separable technology, and the embedded structure is adopted. Once the sealing valve is damaged, only the sealing valve needs to be replaced. Instead of replacing the whole valve body, the maintenance is convenient and the cost is reduced.

Description

Embedded forged Y-type bonnetless globe valve

technical field

The utility model relates to a valve, in particular to an embedded forged Y-type stop valve without a bonnet.

Background technique

The globe valve is a forced sealing valve. When the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and packing and the thrust generated by the pressure of the medium. After the emergence of self-sealing valves, the flow direction of the medium of the globe valve is changed to enter the valve cavity from the top of the disc. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. reduced. At the same time, under the action of the medium, this form of valve is also tighter.

Generally, the disc of the self-sealing globe valve is prone to cavitation under the action of high-temperature and high-pressure gas, resulting in lax valve closure and internal leakage. When the sealing valve needs to be replaced, the entire valve body needs to be replaced, which is inconvenient for maintenance.

Contents of the invention

The purpose of the utility model is to provide an integrated forging, easy and convenient disassembly of the in-forging Y-type bonnetless globe valve.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an embedded forged Y-type bonnetless globe valve, including a valve body, a valve stem, and a handwheel device. An open hollow Y-shaped pipe with a valve stem installation pipe, the feed pipe is connected to the side of the lower end of the valve stem installation pipe, and the discharge pipe is connected to the bottom of the valve stem installation pipe, characterized in that: The intersection angle between the discharge pipe and the center line of the valve stem installation pipe is 65°; the bottom of the valve stem installation pipe is sunken downward to form a valve seat, and a sealing valve line is arranged inside the valve seat; the valve stem Set in the stem installation pipe, the stem valve head is provided with a valve core assembly, the valve core assembly includes a fixed seat that wraps the valve head, and a rounded truncated frustum or cone arranged at the lower end of the fixed seat shaped valve core; the handwheel device includes a valve stem threaded inner sleeve covering the upper part of the valve stem, a fixing seat is arranged between the valve stem threaded inner sleeve and the valve body, and the threaded inner sleeve and the valve body Needle roller bearings are arranged between the fixing seats, and an end cover is arranged on the top surface of the fixing seat, and the end cover is connected with the fixing seat by screws, lock nuts are arranged on both sides of the fixing seat, and the fixing seat It is fixed at the top opening of the valve body through the lock nut.

In the above technical solution, the material of the valve core is stellite hard alloy, which is resistant to high temperature and corrosion, and can effectively prolong the service life of the valve.

In a preferred technical solution, the fixing sleeve is provided with a T-shaped groove matching the shape of the valve head.

In a preferred technical solution, the upper part of the valve stem is provided with external threads.

In a preferred technical solution, the outer surface of the lower part of the valve stem is covered with packing, the top end of the packing is provided with a packing cap, and the top end of the packing cap is provided with a pressure plate.

In a further technical solution, the diameter of the bottom surface of the valve core is smaller than the opening diameter of the sealing valve core, and the diameter of the top surface of the valve core is larger than the opening diameter of the sealing valve core.

In a further technical solution, the inner surface of the threaded inner sleeve is provided with an inner thread matched with the outer thread.

In a preferred technical solution, spherical protrusions are provided on the handwheels.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

1. The utility model is an integrated forged non-bonnet stop valve, which has no bonnet link that may cause leakage. During maintenance, there is no need for a cutting valve, and there is no threaded bonnet that needs to be disassembled;

2. Compared with the straight-through type stop valve, the utility model has a smaller pressure reduction of the 65° type stop valve;

3. The valve body and the sealing valve body of the utility model can be separated, and the embedded structure is adopted. Once the sealing valve line is damaged, only the sealing valve body needs to be replaced instead of the entire valve body, which is convenient for maintenance. ,cut costs;

4. The up and down movement of the valve rod of the utility model replaces the spiral lifting, which reduces the wear of the packing;

5. The utility model is equipped with a needle bearing, which makes the valve stem move more smoothly and reduces the operating torque;

6. The hand wheel of the utility model is equipped with flange balls, which is not easy to slip during operation.

Description of drawings

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

Among them: 1. Valve body; 2. Valve stem; 3. Feed pipe; 4. Discharge pipe; 5. Valve stem installation pipe; ;9, needle bearing; 10, end cover; 11, lock nut; 12, valve core; 13, flexible graphite packing; 14, pressure plate; 15, handwheel.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment one:

As shown in Figure 1, the in-type forged Y-type bonnetless globe valve includes a valve body 1, a valve stem 2, and a handwheel device. 5 is an open hollow Y-shaped pipe, the feed pipe 3 is connected to the side of the lower end of the valve stem installation pipe 5, the discharge pipe 4 is connected to the bottom of the valve stem installation pipe 5, and the center line between the discharge pipe 4 and the valve stem installation pipe 5 The angle of intersection is 65°;

The bottom of the valve stem installation pipe 5 is sunken downward to form a valve seat, and the valve seat is provided with a sealing valve 6; the valve stem 5 is arranged in the valve stem installation pipe, and the valve stem valve head is provided with a valve core assembly, and the valve core assembly includes a package The fixed sleeve of the valve head is arranged on the rounded truncated valve core 6 at the lower end of the fixed sleeve;

The hand wheel device includes a valve stem threaded inner sleeve 7 covering the upper part of the valve stem 2, a fixed seat 8 is arranged between the valve stem threaded inner sleeve 7 and the valve body 1, and a needle bearing 9 is arranged between the threaded inner sleeve and the fixed seat 8 , the top surface of the fixed seat 8 is provided with an end cover 10, the end cover 10 is connected with the fixed seat 8 by screws, the two sides of the fixed seat 8 are provided with lock nuts 11, and the fixed seat 8 is fixed on the top opening of the valve body 1 by the lock nuts 11 place.

The fixing sleeve is provided with a T-shaped groove matching with the shape of the valve head.

The upper part of the valve stem 2 is provided with an external thread.

The valve core 12 is stellite-chromium-cobalt hard alloy, which is resistant to high temperature and corrosion, and can effectively prolong the service life of the valve.

The outer surface of the lower part of the valve stem 2 is covered with a flexible graphite packing 13, and the top of the flexible graphite packing 13 is provided with a packing cap, and the top of the packing cap is provided with a pressing plate 14.

The diameter of the bottom surface of the spool 12 is smaller than the diameter of the opening of the sealing Vers line 6, and the diameter of the top surface of the spool 12 is greater than the diameter of the opening of the sealing Vers line 6. The inner surface of the threaded inner sleeve is provided with an inner thread matched with the outer thread.

Handwheel 15 is provided with spherical protrusions, which can increase friction and prevent slipping.

Claims (7)

1. An embedded forged Y-type non-bonnet stop valve, including a valve body, a valve stem, and a handwheel device. The valve body is an open hollow Y with a feed pipe, a discharge pipe and a valve stem installation pipe. type pipeline, the feed pipe is connected to the side of the lower end of the valve stem installation pipe, and the discharge pipe is connected to the bottom of the valve stem installation pipe. It is characterized in that: the discharge pipe is installed with the valve stem The intersection angle of the center line of the pipe is 65°; the bottom of the valve stem installation pipe is recessed downward to form a valve seat, and a sealing valve line is arranged inside the valve seat; the valve stem is arranged in the valve stem installation pipe, so The valve stem valve head is provided with a spool assembly, the spool assembly includes a fixed sleeve wrapping the valve head, and a rounded frustum-shaped valve core arranged at the lower end of the fixed sleeve; the handwheel device includes a The valve stem threaded inner sleeve on the upper part of the valve stem is provided with a fixed seat between the valve stem threaded inner sleeve and the valve body, and a needle bearing is arranged between the threaded inner sleeve and the fixed seat. The top surface of the seat is provided with an end cover, and the end cover is connected with the fixing seat by screws, and lock nuts are arranged on both sides of the fixing seat, and the fixing seat is fixed on the top of the valve body through the lock nuts opening. 2. The embedded forged Y-type bonnetless globe valve according to claim 1, characterized in that: the upper part of the valve stem is provided with an external thread. 3. The embedded forged Y-type bonnetless globe valve according to claim 1, characterized in that: the outer surface of the lower part of the valve stem is covered with packing, the top of the packing is provided with a packing cap, and the top of the packing cap is A pressure plate is provided. 4. The embedded forged Y-type bonnetless globe valve according to claim 1, characterized in that: the diameter of the bottom surface of the valve core is smaller than the diameter of the opening of the sealing valve, and the diameter of the top surface of the valve core is larger than the diameter of the valve core. Sealed valve opening diameter. 5. The embedded forged Y-type bonnetless globe valve according to claim 2, characterized in that: the inner surface of the threaded inner sleeve is provided with an inner thread matching the outer thread. 6. The embedded forged Y-type bonnetless globe valve according to claim 1, characterized in that: said handwheels are provided with spherical protrusions. 7. The embedded forged Y-type bonnetless globe valve according to claim 1, wherein a T-shaped groove matching the shape of the valve head is provided on the fixing sleeve.