CN213271992U

CN213271992U - Combination valve for sampling

Info

Publication number: CN213271992U
Application number: CN202021959594.6U
Authority: CN
Inventors: 张敬丰
Original assignee: Luoyang Zetian Petrochemical Fittings Co ltd
Current assignee: Luoyang Zetian Petrochemical Fittings Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-05-25
Anticipated expiration: 2030-09-09

Abstract

The utility model relates to a technical field is equipped to the pipeline, a combination valve is used in sampling is disclosed, it is including going out the appearance pipe, back flow and tee bend ball valve, it passes through the tee bend ball valve with the back flow and is connected to go out the appearance pipe, it annotates the fat hole to have seted up on the tee bend ball valve, annotate the downthehole open barrel in both ends of installing, be provided with first annular platform on the inner wall of barrel, the inner ring axial lead of first annular platform is parallel to each other with the axial lead that holds the chamber, first annular platform sets up the recess rather than the inner chamber intercommunication, install the steel ball in the recess, it still installs first spring and steel ball seat to hold the intracavity, first spring passes through the compression of steel ball. The utility model has the advantages that: the groove is arranged to deviate from the inner ring axial lead of the first annular platform, when grease enters the containing cavity, the impact force applied to the steel ball deviates from the center of the groove, the steel ball rotates, the same surface is prevented from being sealed, the outer surface of the steel ball is uniformly corroded and abraded, and the service life of the steel ball is prolonged.

Description

Combination valve for sampling

Technical Field

The utility model relates to a piping erection technical field, especially a combination valve is used in sampling.

Background

The closed sampler is suitable for non-leakage sampling of various media in petroleum and chemical equipment, especially toxic, inflammable, explosive and other harmful medium and low pressure gas and liquid medium. The sample has strong authenticity, high accuracy and no residual liquid and residual gas discharge, and effectively prevents the damage of toxic and harmful media. Meanwhile, the environment is not polluted, and dangerous accidents possibly caused by flammable and explosive media during sampling are avoided.

The ball valves used in the extraction and transportation process are all provided with grease injection valves. In the routine maintenance of the valve, sealing grease needs to be filled into the grease injection valve to protect a sealing mechanism inside the valve and prevent leakage. Most of grease injection valves produced in China at present are single-seal grease injection valves, the phenomenon of grease leakage is easily caused by the single-seal mode, the lubricating effect of the grease on the whole valve is not achieved, and the use of the whole valve is greatly influenced.

Meanwhile, as the transported medium generally contains corrosivity, the sealing system in the grease injection valve is corroded to cause leakage, so that the injected sealing grease is extruded out of the grease injection valve by gas to influence the injection of the sealing grease, and potential safety hazards are left by the leakage of the grease injection valve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combination valve is used in sampling to solve the problem of the easy oil leak in the current use of annotating the fat valve.

The purpose of the utility model is realized through the following technical scheme: a combined valve for sampling comprises a sample outlet pipe, a return pipe and a three-way ball valve, wherein the sample outlet pipe is connected with the return pipe through the three-way ball valve, a grease injection hole is formed in the three-way ball valve, a barrel with two open ends is installed in the grease injection hole, an inner cavity of the barrel comprises a grease injection cavity and a containing cavity, the containing cavity is communicated with the grease injection hole, a first annular table is arranged on the inner wall of one end, close to the grease injection cavity, of the containing cavity, the axial lead of an inner ring of the first annular table is parallel to the axial lead of the containing cavity, a groove communicated with the inner cavity is formed in one surface, far away from the grease injection cavity, of the first annular table along the axial lead of an outer ring of the first annular table, the groove is in the shape of a spherical crown, a steel ball is installed in the groove, the diameter of the steel ball is larger than the diameter of a notch of the groove, the steel ball seat is provided with a groove matched with the steel ball, and the first spring is installed in the accommodating cavity in a compression mode through the steel ball seat.

Preferably, hold the chamber and keep away from be provided with the second annular platform on the inner wall in notes fat chamber, the end cap is installed to the inner chamber tip of second annular platform, the end cap is kept away from first annular platform, the one end of second spring is supported on the end cap, the other end of second spring supports on the third annular platform, the third annular platform is located hold the chamber and keep away from the one end in notes fat chamber.

Preferably, the inner cavity of the second annular table is in a frustum shape, and the large end of the frustum shape is far away from the grease injection cavity.

Preferably, a sampling pipe is installed on the three-way ball valve, a protective cover is installed at the discharge end of the sampling pipe, a gas collecting pipe is arranged on the protective cover, a one-way valve is installed at the gas outlet end of the gas collecting pipe, the gas collecting pipe is communicated with the return pipe through the one-way valve, and an air pump for conveying gas to the return pipe is further installed on the gas collecting pipe.

Preferably, the outer wall of the barrel body, which is far away from the grease injection cavity, and the inner wall of the grease injection cavity are both provided with threads.

Preferably, the inner diameter of the grease injection cavity is larger than the outer diameter of the accommodating cavity, and the outer peripheral surface of the grease injection cavity is in a regular hexagon shape.

The utility model has the advantages of it is following:

1. the groove is arranged to deviate from the inner ring axial lead of the first annular platform, when grease enters the containing cavity, the impact force exerted on the steel ball deviates from the center of the groove, the steel ball rotates, when the grease injection is stopped, the sealing surface of the steel ball rotates, the same surface is prevented from being sealed, the outer surface of the steel ball is uniformly corroded and abraded, and the service life of the steel ball is prolonged.

2. The ball valve has the advantages that the steel ball and the plug form a double-sealing structure, the sealing performance is better, and the phenomenon of oil leakage after the ball valve is filled with grease is reduced.

Drawings

FIG. 1 is a schematic view of an installation structure of a sampling combination valve;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 2 at B;

FIG. 4 is a schematic view of the structure of the grease injection valve;

in the figure, 1-a sample outlet pipe, 2-a return pipe, 3-a three-way ball valve, 4-a grease injection hole, 5-a cylinder, 6-a grease injection cavity, 7-a containing cavity, 8-a groove, 9-a steel ball, 10-a first spring, 11-a steel ball seat, 12-a plug, 13-a second spring, 14-a sampling pipe, 15-a protective cover, 16-a gas collecting pipe, 17-a one-way valve, 18-an air pump, 19-a storage tank and 20-a sampling bottle.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

As shown in fig. 1-4, a combination valve for sampling comprises a sample outlet pipe 1, a return pipe 2 and a three-way ball valve 3, wherein the sample outlet pipe 1 is connected with the return pipe 2 through the three-way ball valve 3, the sample outlet pipe 1 and the return pipe 2 are both arranged on a storage tank 19, the storage tank 19 is further provided with a sampling system (commercial products are adopted according to actual conditions, the working principle and the product installation are not detailed here), the flow direction of gas and liquid is changed through the three-way ball valve 3 to carry out sampling, the three-way ball valve 3 is provided with a grease injection hole 4, a barrel body 5 (namely a shell of the grease injection valve) with two open ends is arranged in the grease injection hole 4, the inner cavity of the barrel body 5 comprises a grease injection cavity 6 and a containing cavity 7, the containing cavity 7 is communicated with the grease injection hole 4, a first annular platform is arranged on the inner wall of one end of the containing cavity 7 close to the grease injection cavity 6, the axial, one side of the first annular platform, which is far away from the grease injection cavity 6, is provided with a groove 8 communicated with an inner cavity of the first annular platform along the axial lead of an outer ring of the first annular platform, the groove 8 is in a spherical crown shape, a steel ball 9 is arranged in the groove 8, the diameter of the steel ball 9 is larger than the diameter of a notch of the groove 8, the steel ball 9 is attached to the groove 8 to seal the accommodating cavity 7 and increase a sealing surface, the sealing performance is improved, the accommodating cavity 7 is also internally provided with a first spring 10 and a steel ball seat 11, the steel ball seat 11 is provided with a groove matched with the steel ball 9, the first spring 10 is arranged in the accommodating cavity 7 through the compression of the steel ball seat 11, the groove 8 is arranged by deviating from the inner annular axial lead of the first annular platform, when grease enters the accommodating cavity 7, the impact force exerted on the steel ball 9 deviates from the center of the groove, the steel ball 9 rotates, when the grease injection is stopped, the service life of the steel ball 9 is prolonged.

In this embodiment, as shown in fig. 1 to 4, a second annular table is disposed on an inner wall of the accommodating chamber 7 away from the grease filling chamber 6, two ends of the first spring 10 respectively abut against the steel ball seat 11 and the second annular table, a plug 12 is installed at an end portion of an inner cavity of the second annular table, the plug 12 is away from the first annular table, one end of the second spring 13 abuts against the plug 12, the other end of the second spring 13 abuts against a third annular table, the third annular table is located at an end of the accommodating chamber 7 away from the grease filling chamber 6, a double-sealing structure is formed by the steel ball and the plug 12, sealing performance is better, and a phenomenon of leakage after the ball valve is filled with grease is reduced.

In this embodiment, as shown in fig. 1 to 4, the inner cavity of the second annular table is frustum-shaped, the large end of the frustum-shaped is far away from the grease injection cavity 6, and the plug 12 is adapted to the frustum-shaped, so that the sealing surface is increased, and the sealing performance is improved.

In this embodiment, as shown in fig. 1 to 4, a sampling tube 14 is installed on a three-way ball valve 3, a protective cover 15 is installed at a discharge end of the sampling tube 14, a sampling bottle 20 is placed in the protective cover 15 for sampling, a gas collecting tube 16 is arranged on the protective cover 15, a check valve 17 is installed at a gas outlet end of the gas collecting tube 16, the gas collecting tube 16 is communicated with a return pipe 2 through the check valve 17, a gas pump 18 for delivering gas to the return pipe 2 is further installed on the gas collecting tube 16, and gas and liquid volatilized from the sampling bottle 20 are pressed back to the return pipe 2 through the gas pump 18 during sampling, so that the gas and liquid volatilized from the gas and liquid are.

In this embodiment, as shown in fig. 1 to 4, the outer wall of the cylinder 5 far from the grease injection cavity 6 and the inner wall of the grease injection cavity 6 are both provided with threads, and the connection structure is more stable by using threaded connection.

In this embodiment, as shown in fig. 1 to 4, the inner diameter of the grease injection cavity 6 is larger than the outer diameter of the accommodating cavity 7, and the outer peripheral surface of the grease injection cavity 6 is regular hexagon, so that the barrel 5 is conveniently screwed, and the smooth outer wall is prevented from slipping when the barrel 5 is screwed.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a combination valve is used in sampling, includes out appearance pipe, back flow and three-way ball valve, go out appearance pipe with the back flow passes through three-way ball valve connects its characterized in that: a grease injection hole is arranged on the three-way ball valve, a cylinder body with two open ends is arranged in the grease injection hole, the inner cavity of the cylinder body comprises a grease injection cavity and an accommodating cavity, the accommodating cavity is communicated with the grease injection hole, a first annular table is arranged on the inner wall of one end of the accommodating cavity close to the grease injection cavity, the axial lead of the inner ring of the first annular table is parallel to the axial lead of the accommodating cavity, one surface of the first annular table, which is far away from the grease injection cavity, is provided with a groove communicated with the inner cavity of the first annular table along the axial lead of the outer ring of the first annular table, the groove is in a spherical crown shape, a steel ball is arranged in the groove, the diameter of the steel ball is larger than the diameter of the notch of the groove, the containing cavity is also provided with a first spring and a steel ball seat, the steel ball seat is provided with a groove matched with the steel ball, and the first spring is installed in the containing cavity through the compression of the steel ball seat.

2. A combination valve for sampling according to claim 1, wherein: hold the chamber and keep away from be provided with second annular platform on the inner wall in notes fat chamber, the end cap is installed to the inner chamber tip of second annular platform, the end cap is kept away from first annular platform, the one end of second spring is supported on the end cap, the other end of second spring supports on third annular platform, third annular platform is located hold the chamber and keep away from the one end in notes fat chamber.

3. A combination valve for sampling according to claim 2, wherein: the three-way ball valve is provided with a sampling pipe, the discharge end of the sampling pipe is provided with a protective cover, the protective cover is provided with a gas collecting pipe, the gas outlet end of the gas collecting pipe is provided with a one-way valve, the gas collecting pipe is communicated with the return pipe through the one-way valve, and the gas collecting pipe is further provided with an air pump for conveying gas to the return pipe.

4. A combination valve for sampling according to claim 3, wherein: the inner cavity of the second annular table is in a frustum shape, and the large end of the frustum shape is far away from the grease injection cavity.

5. A combination valve for sampling according to claim 4, wherein: the barrel is far away from the threads are arranged on the outer wall of the grease injection cavity and the inner wall of the grease injection cavity.

6. A combination valve for sampling according to claim 5, wherein: the inner diameter of the grease injection cavity is larger than the outer diameter of the accommodating cavity, and the outer peripheral surface of the grease injection cavity is in a regular hexagon shape.