CN211082898U

CN211082898U - Gate valve

Info

Publication number: CN211082898U
Application number: CN201922265393.XU
Authority: CN
Inventors: 董亚超; 谢志鹏; 陆洋洋; 刘子发
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-07-24
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a gate valve, which comprises a valve body with a valve cavity, a valve plate movably arranged in the valve cavity and a valve cover arranged on the valve body, wherein the valve plate is provided with a central plane vertical to the thickness direction of the valve plate; the valve body is provided with a valve seat channel central line which is vertical to the central plane; the valve body is provided with a first inner side face and a second inner side face, the lower ends of the first inner side face and the second inner side face form a first inclined face and a second inclined face respectively, and a valve cavity retraction part is formed between the first inclined face and the second inclined face; and a dirt containing cavity is formed on one side of the valve body, which is far away from the valve cover. In this application, owing to set up the dirt chamber that holds that is used for holding the dirt, avoided impurity in the fluid to be detained on the sealed face of valve body and lead to the valve to close not tight problem.

Description

Gate valve

Technical Field

The utility model relates to a valve, concretely relates to gate valve.

Background

In daily chemical production, a gate valve is the valve with the widest application range in pipeline transportation. When heavy oil (such as vacuum residue oil and heavy wax oil), sewage, slurry oil and various liquids containing more impurities are transported, due to the defects of design, after long-time accumulation, more impurities are left in the groove of the gate valve, so that the gate valve is not closed tightly, and further accidents such as pipeline liquid leakage and leakage are caused. And the disassembly and the maintenance of the valve are very troublesome after the accident happens, the part of pipeline is often required to be emptied before treatment, and the daily production efficiency is greatly reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned defect, provide one kind and can reduce because the influence of impurity in the fluid leads to the valve to close not tight valve, specific technical scheme is:

a gate valve comprises a valve body with a valve cavity, a valve plate movably arranged in the valve cavity, and a valve cover arranged on the valve body and used for sealing the valve cavity, wherein the valve plate is provided with a central plane perpendicular to the thickness direction of the valve plate; the valve body is provided with a valve seat channel central line which is vertical to the central plane;

the valve body is provided with a first inner side face and a second inner side face which are arranged at intervals along the extending direction of the center line of the valve seat channel and are parallel to each other, the first inner side face extends obliquely towards the direction departing from the valve cover to form a first inclined face, the second inner side face extends obliquely towards the direction departing from the valve cover to form a second inclined face, and the first inclined face and the second inclined face are both inclined towards the direction of the central plane along the extending direction of the center line of the valve seat channel, so that a valve cavity retraction part with a trapezoidal section is formed between the first inclined face and the second inclined face; the valve plate can be inserted into the valve cavity retraction part; sealing gaskets are respectively paved on the first inner side surface and the second inner side surface;

one side of the valve body deviating from the valve cover is provided with a dirt containing part, a dirt containing cavity communicated with the retracted part of the valve cavity is arranged in the dirt containing part, a sewage draining port is formed in the dirt containing part, and a plugging plate is detachably mounted on the sewage draining port. In order to avoid excessive impurities from being retained on the first inclined surface and the second inclined surface, when the central plane extends along the vertical direction, the included angle between the first inclined surface and the horizontal plane and the included angle between the second inclined surface and the horizontal plane are 55-65 degrees. In the present application, when the center plane extends in the vertical direction, the valve plate moves in the vertical direction when opened or closed.

In this application, set up on the valve body and had the dirt portion of holding that holds dirty chamber, when the fluid was through this gate valve, some impurity that carries in the fluid can drop and hold dirty intracavity, when closing the gate valve, at the in-process that the valve plate was closed, it also can enter into under the promotion of valve plate and hold dirty intracavity to remain impurity on first inclined plane and second inclined plane, utilize this dirt chamber of holding, can improve the dirt ability of holding of gate valve, and can regularly open the drain, discharge the impurity of holding in the dirty intracavity. Due to the arrangement of the valve cavity retraction part, the valve plate can be prevented from entering the dirt holding cavity to block the dirt holding cavity by the aid of the valve cavity retraction part. Because impurity is collected and is held dirty intracavity, avoided impurity adhesion on sealed face, guaranteed the sealed effect of valve, can avoid the problem that produces from this.

In order to discharge the impurities in the sewage containing cavity smoothly, the sewage draining port is arranged on one side deviating from the valve cover, and the plugging plate is connected to the sewage draining port through a flange. When the impurity in the sewage cavity is more, the blocking plate is opened, and the impurity is discharged and collected.

Furthermore, a steam inlet pipe and a steam outlet pipe are respectively arranged on two opposite sides of the dirt containing part. Preferably, the steam inlet pipe and the steam outlet pipe each extend in the extending direction of the center line of the valve seat passage.

After setting up steam inlet pipe and steam discharge pipe, will hold dirty intracavity impurity discharge and collect and close the closure plate after, open steam inlet valve and outlet valve, sweep the chamber wall that holds dirty chamber, sweep to the great heavy oil etc. of viscosity that holds dirty intracavity to the impurity that makes follow-up fluid bring can continue to hold holding and hold dirty chamber, avoids impurity to be detained on the valve body.

In order to enlarge the volume of the dirt containing cavity and increase the dirt containing capacity of the valve, when the central plane extends along the vertical direction, the longitudinal section of the dirt containing cavity, which is vertical to the central plane, is in a trapezoid shape with a large upper part and a small lower part.

Specifically, for making the valve plate can not stretch into when closing and hold dirty intracavity, the one end that deviates from the valve gap of valve plate is trapezoidal, has the first valve plate downside that parallels with first inclined plane to and the second valve plate downside that parallels with the second inclined plane. In-process that closes is carried out at the valve plate, the first valve plate downside of valve plate can support and press on first inclined plane, and the second valve plate downside can support and press on the second inclined plane to prevent the valve plate and enter into and hold dirty intracavity, guarantee to hold dirty ability of holding in the dirty chamber.

Drawings

Fig. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the valve body.

Fig. 3 is a schematic view of the valve plate.

Detailed Description

Referring to fig. 1 to 3, a gate valve includes a valve body 10 formed with a valve chamber 100, a valve plate 31 movably installed in the valve chamber 100, and a valve cover 19 installed on the valve body 10 for sealing the valve chamber 100, the valve plate 31 having a center plane 300 perpendicular to a thickness direction thereof. An inlet pipe 17 and an outlet pipe 18 are respectively provided on opposite sides of the valve body 10, the inlet pipe 17 and the outlet pipe 18 are coaxially provided and are both communicated with the valve chamber 100, and the center lines of the inlet pipe and the outlet pipe form a valve seat passage center line 150. And the valve seat passage centerline is perpendicular to the center plane.

The valve body 10 has a first inner side surface 111 and a second inner side surface 112 which are arranged at intervals along the extending direction of the center line 150 of the valve seat channel and are parallel to each other, the first inner side surface 111 extends obliquely towards the direction away from the bonnet 19 to form a first inclined surface 113, the second inner side surface 112 extends obliquely towards the direction away from the bonnet 19 to form a second inclined surface 114, and along the extending direction of the center line 150 of the valve seat channel, the first inclined surface 113 and the second inclined surface 114 both incline towards the direction of the center plane 300, so that a valve cavity retraction part 110 with a trapezoidal section is formed between the first inclined surface and the second inclined surface; the valve plate can be inserted into the valve cavity setback 110. Sealing gaskets 16 are laid on both the first inner side surface and the second inner side surface.

In this embodiment, when the central plane extends in the vertical direction, the included angle between the first inclined surface and the horizontal plane is 55-60 °. In the present application, when the center plane extends in the vertical direction, the valve plate moves in the vertical direction when opened or closed.

A dirt containing part 13 is formed on one side of the valve body 10, which is far away from the valve cover 19, a dirt containing cavity 131 communicated with the valve cavity retraction part 110 is arranged in the dirt containing part 13, a dirt discharging port 132 is arranged on the dirt containing part, and a plugging plate 15 is detachably arranged on the dirt discharging port 132. When the central plane extends along the vertical direction, the longitudinal section of the dirt holding cavity vertical to the central plane is in a trapezoid shape with a large upper part and a small lower part.

In this embodiment, this drain sets up in the one side that deviates from the valve gap, installs blowdown flange 14 on this drain, and this shutoff board 15 is the blind plate of adopting bolted connection on this blowdown flange. After the blind plate is removed, dirt in the dirt containing cavity can be discharged, and the dirt containing cavity is cleaned.

A steam inlet pipe 21 and a steam outlet pipe 26 are respectively installed at opposite sides of the dirt-holding portion along the extending direction of the center line of the valve seat passage, and an inlet valve 22 is installed on the steam inlet pipe 21 and an outlet valve 27 is installed on the steam outlet pipe 26.

In the present embodiment, the valve plate 31 includes a main body portion 35 having a rectangular cross section and a constricted portion 36 formed at an end of the main body portion 35 away from the valve cover, the constricted portion 36 having a trapezoidal shape and having a first valve plate lower side surface 361 parallel to the first inclined surface 113 and a second valve plate lower side surface 362 parallel to the second inclined surface 114.

One end of the valve rod 32 is detachably fixed to the valve plate 31, and the other end of the valve rod is screwed with a hand wheel 33 after passing through the valve cover 19.

Claims

1. A gate valve is characterized by comprising a valve body, a valve plate and a valve cover, wherein the valve body is provided with a valve cavity, the valve plate is movably arranged in the valve cavity, the valve cover is arranged on the valve body and used for sealing the valve cavity, and the valve plate is provided with a central plane perpendicular to the thickness direction of the valve plate; the valve body is provided with a valve seat channel central line which is vertical to the central plane;

one side of the valve body deviating from the valve cover is provided with a dirt containing part, a dirt containing cavity communicated with the retracted part of the valve cavity is arranged in the dirt containing part, a sewage draining port is formed in the dirt containing part, and a plugging plate is detachably mounted on the sewage draining port.

2. The gate valve of claim 1,

a steam inlet pipe and a steam outlet pipe are respectively arranged on two opposite sides of the dirt holding part.

3. Gate valve according to claim 2, characterised in that the steam inlet pipe and the steam outlet pipe each extend in the direction of extension of the centre line of the passage in the valve seat.

4. The gate valve of claim 1,

this drain sets up in the one side that deviates from the valve gap, and the shutoff board adopts flange joint on this drain.

5. Gate valve according to claim 1, characterised in that the longitudinal section of the dirt-holding chamber perpendicular to the centre plane is trapezoidal with a larger top and a smaller bottom, when the centre plane extends in the vertical direction.

6. The gate valve of claim 1,

the valve plate deviates from the valve cover and has a trapezoidal end, a first valve plate lower side surface parallel to the first inclined surface and a second valve plate lower side surface parallel to the second inclined surface.