CN215172380U

CN215172380U - Ultra-low temperature wedge gate valve

Info

Publication number: CN215172380U
Application number: CN202121158127.8U
Authority: CN
Inventors: 雅克; 张亮
Original assignee: Jiangsu Gaohua Fluid Control Co ltd
Current assignee: Jiangsu Gaohua Fluid Control Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-12-14
Anticipated expiration: 2031-05-27

Abstract

The utility model discloses an ultra-low temperature wedge gate valve relates to gate valve technical field, and for the pipeline that the current wedge gate valve among the solution prior art mainly was applicable to among petrochemical and the thermal power factory is opened and close, these use the scene mostly be high temperature environment, and this type of wedge gate valve in case meet low temperature environment and just appear the problem of leaking easily. The valve comprises a valve body, a gland, a valve body, a valve cover, a valve body, a gland, a hand wheel and a valve body, wherein the port flange is arranged at the two ends of the valve body, the port flange and the valve body are arranged into an integrated structure, the valve cover is arranged above the valve body, the valve cover and the valve body are connected through bolts, the top of the valve cover is provided with a valve body seal shaft, the valve body seal shaft and the valve cover are arranged into an integrated structure, one side of the top of the valve body seal shaft is provided with a packing press plate, the packing press plate and the valve body seal shaft are connected in a combined mode, the top of the valve body seal shaft is provided with a gland, the gland and the valve body seal shaft are connected through internal thread rotation, the top of the gland is provided with a hand wheel, and the hand wheel is connected with the gland in a rotating mode.

Description

Ultra-low temperature wedge gate valve

Technical Field

The utility model relates to a gate valve technical field specifically is an ultra-low temperature wedge gate valve.

Background

The gate valve is an opening and closing member gate plate, the movement direction of the gate plate is perpendicular to the fluid direction, the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled, the gate valve is sealed through the contact of a valve seat and the gate plate, metal materials can be deposited on a sealing surface to increase the wear resistance, the gate plate is provided with a rigid gate plate and an elastic gate plate, and the gate valve is divided into the rigid gate valve and the elastic gate valve according to the difference of the gate plates.

However, the existing wedge gate valve is mainly suitable for opening and closing pipelines in petrochemical engineering and thermal power plants, most of the use scenes are high-temperature environments, and the leakage condition is easy to occur once the wedge gate valve meets the low-temperature environment; therefore, the existing requirements are not met, and an ultralow-temperature wedge gate valve is provided for the requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ultra-low temperature wedge gate valve to solve the pipeline that current wedge gate valve that proposes in the above-mentioned background art mainly was applicable to among petrochemical and the thermal power factory and open and close, these use the scene mostly be high temperature environment, and this type of wedge gate valve in case meet low temperature environment and just appear the problem of leaking easily.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an ultra-low temperature wedge gate valve, includes the valve body, the both ends of valve body all are provided with the port ring flange, and the port ring flange sets up to integral type structure with the valve body, the top of valve body is provided with the valve gap, and the valve gap passes through bolted connection with the valve body, the top of valve gap is provided with valve body seal axle, and valve body seal axle and valve gap set up to integral type structure, one side at valve body seal axle top is provided with the clamp plate that packs, and the clamp plate seals axle built-up connection with the valve body, the top that the valve body sealed the axle is provided with the gland, and the gland passes through the internal thread rotation with the valve body seal axle and is connected, the top of gland is provided with the hand wheel, and the hand wheel rotates with the gland to be connected.

Preferably, the inside of valve body is provided with the valve pocket, and the inside of valve pocket is provided with the flashboard, the top of flashboard is provided with the valve rod, and the valve rod passes through bolted connection with the flashboard.

Preferably, the flashboard both sides all are provided with the disk seat, and the disk seat passes through the draw-in groove with the valve body and is connected, the flashboard rotates with the disk seat to be connected.

Preferably, a sealing gasket is arranged between the valve cover and the valve body, and the sealing gasket is attached to the valve cover and the valve body.

Preferably, the inside of valve gap is provided with the seal receptacle, and the below of going up the seal receptacle is provided with down the seal receptacle, go up the seal receptacle and pass through the draw-in groove with lower seal receptacle and be connected with the valve gap.

Preferably, the inside of the packing press plate is provided with a packing pressing sleeve, the packing pressing sleeve is attached to the packing press plate, and the bottom of the packing pressing sleeve is provided with graphite filler.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the valve seats of the utility model are positioned at both sides of the flashboard, and the whole valve seat is of an inclined structure, so that gas can not directly and quickly traverse through the flashboard area after entering the valve cavity, but can pass through the flashboard area after being bent, thereby avoiding the condition that the flashboard is loosened due to overlarge medium pressure;

2. the utility model discloses an inside packing of being provided with of clamp plate of packing presses cover and graphite stopping, and the graphite stopping has two kinds, is flexible graphite respectively and weaves graphite, and two kinds of graphite materials are packed in turn and are pressing the inside of cover at the packing, can ensure the leakproofness of valve rod top switching department like this, avoid outside air to enter into the inside of valve body because of the shrinkage condition appears under the ultra-low temperature environment in the inside atmospheric pressure of valve body.

Drawings

FIG. 1 is an overall front view of the present invention;

FIG. 2 is a schematic view of the overall internal structure of the present invention;

fig. 3 is an enlarged schematic view of the position a of the present invention.

In the figure: 1. a valve body; 2. a valve cover; 3. a port flange; 4. a gland; 5. a hand wheel; 6. a packing press plate; 7. the valve body seals the shaft; 8. a valve cavity; 9. a valve seat; 10. a shutter plate; 11. a valve stem; 12. an upper seal seat; 13. sealing gaskets; 14. pressing and sleeving the filler; 15. graphite filler; 16. and a lower seal seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, the present invention provides an embodiment: an ultra-low temperature wedge gate valve comprises a valve body 1, two end flanges 3 are arranged at two ends of the valve body 1, the port flange 3 and the valve body 1 are arranged into an integral structure, the port flange 3 can be connected with a pipeline, the valve cover 2 is arranged above the valve body 1, the valve cover 2 is connected with the valve body 1 through a bolt, the top of the valve cover 2 is provided with a valve body sealing shaft 7, the valve body sealing shaft 7 and the valve cover 2 are arranged into an integral structure, the valve rod 11 is arranged inside the valve body sealing shaft 7, one side of the top of the valve body sealing shaft 7 is provided with a packing pressing plate 6, and the packing pressure plate 6 is combined and connected with the valve body seal shaft 7, the top of the valve body seal shaft 7 is provided with a gland 4, the gland 4 is rotationally connected with the valve body sealing shaft 7 through internal threads, the top of the gland 4 is provided with a hand wheel 5, the hand wheel 5 is rotationally connected with the gland 4, the opening and closing operations of the valve rod 11 and the gate plate 10 at the bottom of the rod body are controlled by rotating the hand wheel 5.

Referring to fig. 2, a valve cavity 8 is arranged inside a valve body 1, a gate plate 10 is arranged inside the valve cavity 8, a valve rod 11 is arranged at the top of the gate plate 10, the valve rod 11 is connected with the gate plate 10 through a bolt, valve seats 9 are arranged on both sides of the gate plate 10, the valve seats 9 are connected with the valve body 1 through clamping grooves, the valve seats 9 are arranged on both sides of the gate plate 10, the whole structure is an inclined structure, so that gas cannot directly and quickly cross through the region of the gate plate 10 after entering the valve cavity 8, but can pass through the region after being bent, thereby avoiding the situation that the gate plate 10 is loosened due to overlarge medium pressure, the gate plate 10 is rotatably connected with the valve seats 9, a sealing gasket 13 is arranged between a valve cover 2 and the valve body 1, the sealing gasket 13 is connected with the valve cover 2 and the valve body 1 in an attaching manner, an upper sealing seat 12 is arranged inside the valve cover 2, and a lower sealing seat 16 is arranged below the upper sealing seat 12, the upper sealing seat 12 and the lower sealing seat 16 are connected with the valve cover 2 through clamping grooves.

Referring to fig. 3, a packing pressing sleeve 14 is arranged inside the packing pressing plate 6, the packing pressing sleeve 14 is attached to the packing pressing plate 6, graphite filler 15 is arranged at the bottom of the packing pressing sleeve 14, the graphite filler 15 is flexible graphite and woven graphite, and the two graphite materials are alternately filled inside the packing pressing sleeve 14, so that the sealing performance of the top adapter of the valve rod 11 can be guaranteed, and external air is prevented from entering the inside of the valve body due to cold shrinkage of air pressure inside the valve body in an ultralow temperature environment.

The working principle is as follows: when in use, the valve body 1 is connected with a medium conveying pipeline through the port flange plates 3 at two ends, the valve cover 2 is arranged above the valve body 1 and is connected with the valve cover 2 through bolts, the valve body sealing shaft 7 is arranged at the top of the valve cover 2, the valve rod 11 is arranged inside the valve body sealing shaft 7, the gland 4 is arranged at the top of the valve body sealing shaft 7, the hand wheel 5 is arranged at the top of the gland 4, the valve rod 11 and the flashboard 10 at the bottom of the rod body are controlled to open and close by rotating the hand wheel 5, the valve cavity 8 is arranged inside the valve body 1, the flashboard 10 is arranged in the valve cavity 8, the valve seats 9 are arranged at two sides of the flashboard 10 and are integrally in an inclined structure, so that gas can not directly and quickly cross through the area of the flashboard 10 after entering the valve cavity 8 but can pass through the flashboard after being bent, and the situation that the looseness of the flashboard 10 caused by overlarge medium pressure can be avoided, and finally, a packing pressing sleeve 14 and a graphite packing material 15 are arranged inside a packing pressing plate 6 on the outer side of the top of the valve body sealing shaft 7, the graphite packing material 15 is flexible graphite and woven graphite, and the two graphite materials are alternately filled inside the packing pressing sleeve 14, so that the sealing performance of the top switching part of the valve rod 11 can be guaranteed, and the phenomenon that outside air enters the inside of the valve body due to the cold shrinkage condition of the air pressure inside the valve body under the ultralow-temperature environment is avoided.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides an ultra-low temperature wedge gate valve, includes valve body (1), its characterized in that: both ends of the valve body (1) are provided with port flange discs (3), the port flange discs (3) and the valve body (1) are arranged into an integral structure, a valve cover (2) is arranged above the valve body (1), the valve cover (2) is connected with the valve body (1) through a bolt, a valve body sealing shaft (7) is arranged at the top of the valve cover (2), the valve body sealing shaft (7) and the valve cover (2) are arranged into an integral structure, one side of the top of the valve body sealing shaft (7) is provided with a packing pressing plate (6), the packing pressure plate (6) is connected with the valve body seal shaft (7) in a combined way, the top of the valve body seal shaft (7) is provided with a gland (4), and gland (4) and valve body seal axle (7) are connected through the internal thread rotation, the top of gland (4) is provided with hand wheel (5), and hand wheel (5) rotate with gland (4) and be connected.

2. An ultra-low temperature wedge gate valve in accordance with claim 1, wherein: the valve is characterized in that a valve cavity (8) is arranged inside the valve body (1), a flashboard (10) is arranged inside the valve cavity (8), a valve rod (11) is arranged at the top of the flashboard (10), and the valve rod (11) is connected with the flashboard (10) through bolts.

3. An ultra-low temperature wedge gate valve in accordance with claim 2, wherein: flashboard (10) both sides all are provided with disk seat (9), and disk seat (9) are connected through the draw-in groove with valve body (1), flashboard (10) rotate with disk seat (9) and are connected.

4. An ultra-low temperature wedge gate valve in accordance with claim 1, wherein: a sealing gasket (13) is arranged between the valve cover (2) and the valve body (1), and the sealing gasket (13) is attached to the valve cover (2) and the valve body (1).

5. An ultra-low temperature wedge gate valve in accordance with claim 4, wherein: the valve cap is characterized in that an upper sealing seat (12) is arranged inside the valve cap (2), a lower sealing seat (16) is arranged below the upper sealing seat (12), and the upper sealing seat (12) and the lower sealing seat (16) are connected with the valve cap (2) through clamping grooves.

6. An ultra-low temperature wedge gate valve in accordance with claim 1, wherein: the packing press plate is characterized in that a packing press sleeve (14) is arranged inside the packing press plate (6), the packing press sleeve (14) is attached to the packing press plate (6), and graphite packing (15) is arranged at the bottom of the packing press sleeve (14).