CN214662159U

CN214662159U - High-temperature-resistant wear-resistant lining gate valve

Info

Publication number: CN214662159U
Application number: CN202023173473.1U
Authority: CN
Inventors: 王军刚; 郝宏达; 陈文鑫; 董霞; 张娜; 张国锋; 范相辉; 顾振军; 张建宝; 陆钰珍; 蒋亚琴; 邵学军; 李鹏飞
Original assignee: LANZHOU HIGH PRESSURE VALVE CO Ltd
Current assignee: LANZHOU HIGH PRESSURE VALVE CO Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-11-09
Anticipated expiration: 2030-12-25

Abstract

A high-temperature resistant and wear-resistant lining gate valve comprises a valve body, a flow passage in the horizontal direction is arranged in the valve body, a gate plate is arranged in the valve body, and the gate plate is in sealing fit with a valve seat on the flow passage; the upper end of the flashboard is provided with a valve rod, and the valve rod is driven to do lifting motion through a hand wheel to control the flashboard to open and close the valve; the lower end of the gate plate is of an arc structure, a hard alloy Co-Cr-W (Stellite-6 # layer) is welded on the surface of the arc structure in a surfacing mode, and the thickness of the hard alloy layer is not smaller than 2 mm. The utility model provides the high reliability that the valve used has prolonged the life of valve.

Description

High-temperature-resistant wear-resistant lining gate valve

Technical Field

The invention relates to the technical field of valve manufacturing, in particular to a high-temperature-resistant wear-resistant lining gate valve which is mainly applied to the fields of petroleum, chemical engineering and the like.

Background

In the field of petrochemical industry, there are many devices for conveying high-temperature and large-erosion catalyst particles and working media containing coke powder and the like, and high-temperature and wear-resistant gate valves are very important as opening and closing elements in the devices. In the operation process of the device, because the conveyed medium contains solid particles, the erosion and the abrasion of a valve body channel, a middle cavity and a flashboard of the valve are serious, and the service life of the valve is short. Therefore, a high-temperature wear-resistant gate valve with a special structure needs to be designed to ensure the normal operation of the device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high temperature resistant wear-resisting lining gate valve has improved the reliability that the valve used, has prolonged the life of valve.

The utility model adopts the following technical scheme:

a high-temperature resistant and wear-resistant lining gate valve comprises a valve body, a flow passage in the horizontal direction is arranged in the valve body, a gate plate is arranged in the valve body, and the gate plate is in sealing fit with a valve seat on the flow passage; the upper end of the flashboard is provided with a valve rod, and the valve rod is driven to do lifting motion through a hand wheel to control the flashboard to open and close the valve; the lower end of the gate plate is of an arc structure, a hard alloy Co-Cr-W (Stellite-6 # layer) is welded on the surface of the arc structure in a surfacing mode, and the thickness of the hard alloy layer is not smaller than 2 mm.

Hard alloy Co-Cr-W (Stellite-6 #) layers are welded on two side faces of the arc structure at the lower end of the gate plate in a surfacing mode, the hard alloy layers are in sealing fit with the valve seat on the runner, and the hard alloy Co-Cr-W (Stellite-6 #) layers are welded on the sealing face of the valve seat in a surfacing mode; the thickness of the hard alloy layer is not less than 2 mm.

The central grooves of the two side surfaces of the flashboard are fixedly connected with flashboard linings which are of a tortoise-shell net structure.

A valve body lining is fixedly connected in a flow passage of the valve body and is of a tortoise shell net structure.

The tortoise shell net structure is as follows: a plurality of omega-shaped or Y-shaped anchoring nails are fixedly connected in the flow channel or the grooves in the centers of two side surfaces of the gate plate, the spacing between the anchoring nails is 65mm, lining layers are arranged between frameworks formed by the anchoring nails, the lining layers are made of TA218, and the thickness is 25 mm.

The utility model provides the high reliability that the valve used has prolonged the life of valve.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is an enlarged schematic view of the valve body passage and the middle chamber lining layer of the present invention;

fig. 3 is a front view of the utility model gate;

FIG. 4 is a side view of FIG. 3, a ram liner schematic;

in the figure: 1-valve body, 2-gate plate, 3-valve rod, 4-valve cover, 5-filler, 6-hand wheel, 7-limit nut, 8-purge valve, 9-blow-off valve, 10-valve body lining, 11-valve body surfacing hard alloy, 12-gate plate lining and 13-gate plate surfacing hard alloy.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings.

Referring to fig. 1, the gate valve with the high-temperature resistant and wear-resistant lining comprises a valve body 1, a flow channel in the horizontal direction is arranged in the valve body 1, a flashboard 2 is arranged in the valve body 1, and the flashboard 2 is in sealing fit with a valve seat on the flow channel; valve rod 3 is installed to the upper end of flashboard 2, drives valve rod 3 through hand wheel 6 and is elevating movement, and valve rod 3 drives flashboard 2 and realizes opening and closing of valve. The valve cover 4 and the valve body 1 are fixedly connected through bolts. And a packing 5 is arranged in a packing box of the valve cover 4, so that the sealing between the valve cover 4 and the valve rod 3 is realized. The lower end of the gate plate 2 is of an arc structure, a hard alloy (Co-Cr-W (Stellite-6 #) layer 13) is welded on the surface of the arc structure in a surfacing mode, and the thickness of the hard alloy layer is not less than 2 mm.

Hard alloy (Co-Cr-W (Stellite-6 #) layers 12 are welded on two side faces of the arc structure at the lower end of the gate plate 2 in a surfacing mode, the hard alloy layers are in sealing fit with a valve seat on a runner, the hard alloy (Co-Cr-W (Stellite-6 #) layers are welded on a sealing face of the valve seat in a surfacing mode, and the thickness of each hard alloy layer is not smaller than 2 mm.

And a layer of gate plate lining layer 12 is fixedly connected in the grooves in the centers of the two side surfaces of the gate plate 2, and the gate plate lining layer 12 is of a tortoise-shell net structure.

A valve body lining layer 10 is fixedly connected in a flow passage of the valve body 1, and the flashboard lining layer 10 is of a tortoise shell net structure.

Referring to fig. 2 and 4, the tortoise-shell net structure is: a plurality of omega-shaped or Y-shaped anchoring nails are fixedly connected in the flow channel or the grooves in the centers of two side surfaces of the gate plate 2, the distance between the anchoring nails is 65mm, lining layers are arranged between frameworks formed by the anchoring nails, the lining layers are made of TA218, and the thickness of the lining layers is 25 mm. The effect of wear resistance is achieved.

And a limiting nut 7 is arranged at the top of the valve rod 3 to prevent the gate plate 2 from being closed too tightly and blocked under the alternating action of high temperature and normal temperature.

The upper portion of the valve cover 4 is provided with a steam purging valve 8, the bottom of the valve body 1 is provided with a blowdown valve 9, and the problem that sealing is affected due to accumulation of media in the valve cavity is effectively solved through steam purging.

Claims

1. A high-temperature resistant and wear-resistant lining gate valve comprises a valve body, a flow passage in the horizontal direction is arranged in the valve body, a gate plate is arranged in the valve body, and the gate plate is in sealing fit with a valve seat on the flow passage; the upper end of the flashboard is provided with a valve rod, and the valve rod is driven to do lifting motion through a hand wheel to control the flashboard to open and close the valve; the lower end of the gate plate (2) is of an arc structure, the surface of the arc structure is subjected to surfacing welding of hard alloy Co-Cr-W, namely a Stellite-6 # layer, and the thickness of the hard alloy layer is not less than 2 mm.

2. The high temperature and wear resistant lining gate valve according to claim 1, characterized in that hard alloy Co-Cr-W, Stellite-6 # layer, is welded on the two side faces of the arc structure at the lower end of the gate plate (2), the hard alloy layer is in sealing fit with the valve seat on the runner, and the hard alloy Co-Cr-W, Stellite-6 # layer is welded on the sealing surface of the valve seat; the thickness of the hard alloy layer (13) is not less than 2 mm.

3. The gate valve with the high-temperature-resistant and wear-resistant lining as claimed in claim 2, wherein a gate plate lining layer (12) is fixedly connected in the central grooves of the two side surfaces of the gate plate (2), and the gate plate lining layer (12) is of a tortoise-shell net structure.

4. The gate valve with the high-temperature-resistant and wear-resistant lining as claimed in claim 2, wherein a valve body lining layer (10) is fixedly connected in the flow passage of the valve body (1), and the valve body lining layer (10) is of a tortoise-shell net structure.

5. A refractory and wear resistant lining gate valve as claimed in claim 3 or 4, wherein said tortoise shell net structure is: a plurality of omega-shaped or Y-shaped anchoring nails are fixedly connected in the flow channel or the grooves in the centers of two side faces of the flashboard (2), the distance between the anchoring nails is 65mm, lining layers are arranged between frameworks formed by the anchoring nails, the lining layers are made of TA218, and the thickness is 25 mm.