CN216478964U

CN216478964U - Controllable pressure relief device of grease injection valve

Info

Publication number: CN216478964U
Application number: CN202122610146.6U
Authority: CN
Inventors: 何磊; 杨太刚; 董伟; 陈传永; 毛键; 李俊; 姚榆
Original assignee: Sichuan Huayu Petroleum Drilling And Production Equipment Co ltd
Current assignee: Sichuan Huayu Petroleum Drilling And Production Equipment Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-05-10
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a controllable pressure relief device of a grease injection valve, which comprises a body, an ejector rod, a rotating mechanism and a pressure relief screw, wherein the ejector rod is arranged on the body; the ejector rod is in threaded connection with a through hole formed in the body, and the rotating mechanism is arranged at the top end of the ejector rod; the top end of the through hole is hermetically connected with the ejector rod, the bottom end of the through hole is provided with a grease injection valve threaded interface, and a pressure relief cavity is formed between the through hole positioned above the grease injection valve threaded interface and the ejector rod; the body is provided with a first pressure relief opening and a second pressure relief opening, the second pressure relief opening is provided with a pressure relief screw, the second pressure relief opening is communicated with the pressure relief cavity, and the first pressure relief opening is communicated with the second pressure relief opening. The controllable pressure relief device of the grease injection valve can safely discharge fluid in a valve cavity of a wellhead device and a gate valve, and then carries out field maintenance on the wellhead device and the gate valve.

Description

Controllable pressure relief device of grease injection valve

Technical Field

The utility model relates to the technical field of maintenance and repair of wellhead devices and gate valves in the petroleum and natural gas industry, in particular to a controllable pressure relief device of a grease injection valve.

Background

In the field maintenance and repair work of a wellhead device and a gate valve, the grease injection valve is usually required to be disassembled, and at the moment, if the valve cavities of the wellhead device and the gate valve are pressurized, the grease injection valve is disassembled under pressure, certain risks exist, so that a safe and reliable pressure relief device is required.

At present, the pressure relief device on the market is uncontrollable after the failure of the grease injection valve, and still causes certain risks.

SUMMERY OF THE UTILITY MODEL

The utility model provides a controllable pressure relief device of a grease injection valve, which aims to solve the technical problem.

The technical scheme adopted by the utility model is as follows: the controllable pressure relief device of the grease injection valve comprises a body, a mandril, a rotating mechanism and a pressure relief screw; the ejector rod is in threaded connection with a through hole formed in the body, and the rotating mechanism is arranged at the top end of the ejector rod; the top end of the through hole is hermetically connected with the ejector rod, the bottom end of the through hole is provided with a grease injection valve threaded interface, and a pressure relief cavity is formed between the through hole positioned above the grease injection valve threaded interface and the ejector rod; the body is provided with a first pressure relief opening and a second pressure relief opening, the second pressure relief opening is provided with a pressure relief screw, the second pressure relief opening is communicated with the pressure relief cavity, and the first pressure relief opening is communicated with the second pressure relief opening.

As an optimal mode of the controllable pressure relief device of the grease injection valve, the controllable pressure relief device of the grease injection valve further comprises a pressing cap, a pressing ring and a sealing ring which are sequentially sleeved from top to bottom on the ejector rod, the body is in threaded connection with the pressing cap, and the pressing cap, the pressing ring and the sealing ring are used for sealing between the top end of the through hole and the ejector rod.

As a preferable mode of the controllable pressure relief device of the grease injection valve, the rotating mechanism is a handle fixedly installed at the top end of the ejector rod.

As an optimal mode of the controllable pressure relief device of the grease injection valve, the middle part of the through hole of the body is provided with an internal thread, and the middle part of the ejector rod is provided with an external thread section matched with the internal thread of the through hole.

As a preferable mode of the controllable pressure relief device of the grease injection valve, a sealing gasket is further fixed at the bottom end of the through hole.

The utility model has the beneficial effects that: the controllable pressure relief device of the grease injection valve can safely discharge fluid in a valve cavity of a wellhead device and a gate valve, and then carries out field maintenance on the wellhead device and the gate valve.

Drawings

Fig. 1 is a cross-sectional view of a controllable pressure relief device of a grease filling valve disclosed by the utility model.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Reference numerals: 1. a handle; 2. pressing the cap; 3. a body; 301. a first pressure relief port; 302. a grease injection valve threaded interface; 4. pressing a ring; 5. a seal ring; 6. a top rod; 601. an external threaded section; 7. a pressure relief screw; 8. a gasket; 9. a pressure relief cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings, but embodiments of the present invention are not limited thereto.

Referring to fig. 1, the present embodiment discloses a controllable pressure relief device for a grease injection valve, which includes a body 3, a plunger 6, a rotating mechanism, and a pressure relief screw 7.

The push rod 6 is in threaded connection with a through hole formed in the body 3, preferably, an internal thread is arranged in the middle of the through hole of the body 3, and an external thread section 601 matched with the internal thread of the through hole is arranged in the middle of the push rod 6.

The rotating mechanism is arranged at the top end of the push rod 6, in the embodiment, the rotating mechanism preferably adopts a handle 1, and the handle 1 is fixed at the top end of the push rod 6 through a nut. Rotating the handle 1 moves the ram 6 up and down relative to the body 3.

Sealing connection, preferred, sealing connection is located through top-down cover in proper order between through-hole top and the ejector pin 6 press cap 2, clamping ring 4 and sealing washer 5 realization on the ejector pin 6, be provided with on the outer wall of 3 tops of body and press the external screw thread of cap 2 threaded connection. Tightening the compression cap 2 causes the compression ring 4 to compress the sealing ring 5.

The through-hole bottom is provided with notes fat valve hickey 302, sets up notes fat valve hickey 302 on body 3 and is used for with annotate fat valve threaded connection, and in order to strengthen sealing performance, the through-hole bottom still is fixed with sealed 8, and this sealed 8 that seal is located the step department of annotating fat valve hickey 302.

And a pressure relief cavity 9 is formed between the through hole positioned above the threaded interface 302 of the grease filling valve and the ejector rod 6. Referring to fig. 2, a first pressure relief opening 301 and a second pressure relief opening are formed in the body 3, a pressure relief screw 7 is mounted at the second pressure relief opening, the second pressure relief opening is communicated with the pressure relief cavity 9, and the first pressure relief opening 301 is communicated with the second pressure relief opening. When the pressure relief screw 7 is tightened, the first pressure relief port 301 is completely blocked. The first pressure relief opening 301 may be connected to a pipeline to collect fluid, and the pressure relief screw 7 may control the flow of the fluid.

The working principle of the utility model is as follows: when using this pressure relief device, annotate fat valve threaded interface 302 through 3 lower parts of body and be connected with annotating the fat valve, twist grip 1 makes 6 backs down of ejector pin annotate fat valve steel balls, and the fluid flows into pressure release chamber 9, then gets into first pressure release mouth 301, can safe and controllable carry out the pressure release through the pipeline of connecting at first pressure release mouth 301.

If the valve cavity pressure can not be completely leaked due to factors such as leakage in the gate valve and the like in the use process, the mandril 6 can be withdrawn. If annotate the fat valve inefficacy this moment, can dismantle the pipeline after screwing up pressure release screw 7, stay this pressure relief device on annotating the fat valve, avoid the gate valve because of annotating the fat valve inefficacy and out of control.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A controllable pressure relief device of a grease injection valve is characterized by comprising a body, a mandril, a rotating mechanism and a pressure relief screw; the ejector rod is in threaded connection with a through hole formed in the body, and the rotating mechanism is arranged at the top end of the ejector rod; the top end of the through hole is hermetically connected with the ejector rod, the bottom end of the through hole is provided with a grease injection valve threaded interface, and a pressure relief cavity is formed between the through hole positioned above the grease injection valve threaded interface and the ejector rod; the body is provided with a first pressure relief opening and a second pressure relief opening, the second pressure relief opening is provided with a pressure relief screw, the second pressure relief opening is communicated with the pressure relief cavity, and the first pressure relief opening is communicated with the second pressure relief opening.

2. The controllable pressure relief device for the grease injection valve according to claim 1, further comprising a pressure cap, a pressure ring and a sealing ring which are sequentially sleeved on the ejector rod from top to bottom, wherein the body is in threaded connection with the pressure cap, and the pressure cap, the pressure ring and the sealing ring are used for sealing the top end of the through hole and the ejector rod.

3. The controllable pressure relief device of a grease injection valve according to claim 1, wherein the rotating mechanism is a handle fixedly mounted on the top end of the ejector rod.

4. The controllable pressure relief device of the grease injection valve according to claim 1, wherein an internal thread is arranged in the middle of the through hole of the body, and an external thread section matched with the internal thread of the through hole is arranged in the middle of the ejector rod.

5. The controllable pressure relief device of the grease injection valve according to claim 1, wherein a sealing gasket is further fixed at the bottom end of the through hole.