阅读说明：本技术 井下硫化器加压保压装置及其加压、调压、保压方法 (Pressurization and pressure maintaining device of underground vulcanizer and pressurization, pressure regulation and pressure maintaining method thereof ) 是由 张祥新 邹德明 李伟平 杨树明 范守俊 颜世尧 魏良跃 韩涛 程平 尹连刚 鲍元 于 2020-07-03 设计创作，主要内容包括：本发明涉及一种井下硫化器加压保压装置及其加压、调压、保压方法。现有井下硫化器调压、保压不方便。为此,本井下硫化器加压保压装置包括压力包、进水管、进水阀、回水管、回水阀、压力表、第二进水阀、前阀、后阀和阶梯活塞压力调节机构,第二进水阀设置在进水阀与回水管之间的进水管上,阶梯活塞压力调节机构包括壳体和阶梯活塞杆,其中阶梯活塞杆包括粗圆柱体和细圆柱体,二者横截面面积之比等于4︰1.8,阶梯活塞杆设置在壳体内,粗圆柱腔外端的壳体侧壁和细圆柱腔外端的壳体侧壁上分别开有接口,两接口分别与第二进水阀前后的进水管相通,粗、细圆柱体上设有O型密封圈。本发明调压、保压方便,适合为煤矿井下硫化器加压、保压。(The invention relates to a pressurization and pressure maintaining device of an underground vulcanizer and pressurization, pressure regulation and pressure maintaining methods thereof. The pressure regulation and pressure maintaining of the existing underground vulcanizer are inconvenient. Therefore, the pressurizing and pressure maintaining device of the underground vulcanizer comprises a pressure bag, a water inlet pipe, a water inlet valve, a water return pipe, a water return valve, a pressure gauge, a second water inlet valve, a front valve, a rear valve and a stepped piston pressure adjusting mechanism, wherein the second water inlet valve is arranged on the water inlet pipe between the water inlet valve and the water return pipe, the stepped piston pressure adjusting mechanism comprises a shell and a stepped piston rod, the stepped piston rod comprises a thick cylinder and a thin cylinder, the cross section area ratio of the thick cylinder to the thin cylinder is equal to 4: 1.8, the stepped piston rod is arranged in the shell, the shell side wall at the outer end of the thick cylinder cavity and the shell side wall at the outer end of the thin cylinder cavity are respectively provided with a connector, the two connectors are respectively communicated with the water inlet pipe at the front and. The invention has convenient pressure regulation and pressure maintaining and is suitable for pressurizing and maintaining the pressure of the coal mine underground vulcanizer.)

1. The utility model provides an underground vulcanizer pressurization pressurizer, includes pressure package, inlet tube, water intaking valve, wet return and manometer, and inlet tube one end communicates with each other with the pressure package, and the other end communicates with each other with 4 megapascal high pressure water sources commonly used in the pit, the water intaking valve sets up on the inlet tube, the wet return communicates with each other with the inlet tube of water intaking valve low reaches, the wet return sets up on the wet return, the manometer communicates with each other with the inlet tube of wet return low reaches, its characterized in that: the water inlet valve is arranged on a water inlet pipe between the water inlet valve and the water return pipe, the stepped piston pressure adjusting mechanism comprises a shell and a stepped piston rod, the stepped piston rod comprises a thick cylinder and a thin cylinder which are coaxially and fixedly connected, the ratio of the cross section areas of the thick cylinder and the thin cylinder is equal to 4: 1.8, a thick cylinder cavity and a thin cylinder cavity are arranged in the shell, the inner ends of the thick cylinder cavity and the thin cylinder cavity are communicated, the central lines of the thick cylinder cavity and the thin cylinder cavity coincide, the stepped piston rod is arranged in the shell, the shell side wall at the outer end of the thick cylinder cavity and the shell side wall at the outer end of the thin cylinder cavity are respectively provided with an interface, the interface of the thick cylinder cavity is communicated with the water inlet pipe between the second water inlet valve and the water return pipe through the rear valve and a matched pipeline and a tee joint, the interface of the thin cylinder cavity is communicated with the water inlet pipe between the second water inlet valve and the water inlet valve through the, annular caulking grooves are formed in the thick cylinder body and the thin cylinder body respectively, and O-shaped sealing rings are arranged in the annular caulking grooves.

2. The downhole vulcanizer pressurizing and pressure maintaining device of claim 1, wherein: a branch pipe is arranged on the water inlet pipe at the downstream of the water return pipe, a valve is arranged on the branch pipe, the outer end of the branch pipe is communicated with a safety valve, and the take-off pressure of the safety valve is 2.0 MPa.

3. A method of pressurizing, pressure regulating and pressure maintaining in a downhole vulcanizer pressure maintaining device as defined in claim 1 or 2, comprising the steps of:

pressurizing: firstly, ensuring that the front valve, the rear valve and the water return valve are in a closed state, then opening the second water inlet valve, and then slowly opening the water inlet valve, so that water can be injected into the pressure bag for pressurization;

regulating pressure: when the pressure gauge displays that the internal pressure of the pressure bag reaches 1.9 MPa, the second water inlet valve is closed, the front valve and the rear valve are opened, the stepped piston rod moves towards the thin cylindrical cavity, the liquid in the pressure bag is reduced, and the pressure in the pressure bag is reduced and kept at 1.8 MPa;

pressure maintaining: when the pressure of the pressure package drops, the stepped piston rod moves towards the thick cylindrical cavity to supplement liquid into the pressure package, so that the pressure in the pressure package rises and is kept at 1.8 MPa.

Technical Field

The invention relates to a pressurization and pressure maintaining device of an underground vulcanizer and pressurization, pressure regulation and pressure maintaining methods thereof.

Background

Various underground equipment needs to be pressurized, such as a hydraulic prop, a vulcanizer, a hydraulic clamp and the like, the traditional pressurization mode is electric pressurization, a switch and a cable are used for supplying power to a pump station, and the pump station is used for pressurizing the equipment needing to be pressurized. The pressurizing link is complex, the equipment and electric energy investment is more, and the cost needs to include working hours and expenses of pump stations, switches, cables, electric energy, personnel installation and the like. Meanwhile, the electric energy is used, so that the potential danger of electric shock of personnel is avoided, the pressure of a pump station is not easy to adjust, and the potential danger that the personnel are injured due to the fact that the pipeline collapses and bounces can occur in the case of overlarge pressure.

Published in 2017, 03, and 22, and publication numbers are as follows: CN 206030332U Chinese utility model discloses a static pressure device for vulcanizing a steel wire rope core rubber belt joint, which is characterized in that a pressure bag is connected with a water inlet pipe, and the water inlet pipe is communicated with an underground dustproof water pipe; a first valve, a first tee joint, a second tee joint and a water pressure gauge are sequentially arranged on the water inlet pipe from the water inlet of the water inlet pipe; the first tee joint is connected with a second valve, and the second valve is connected with a water return pipe; and a third valve is connected through a second tee joint and is provided with a safety valve, and the pressure of the safety valve is adjusted to be the pressure when the joint of the steel wire rope core rubber belt is vulcanized.

The utility model has certain progress, but still has the following problems:

1. after the first valve is opened, the pressure bag is communicated with a 4 MPa high-pressure water source commonly used in the well, attention must be paid to the water pressure gauge at any time, when the water pressure gauge reaches 1.8 MPa, the first valve is closed in time,

otherwise, the pressure bag can be continuously pressurized until the safety valve jumps.

2. In the vulcanization process, attention must be paid to the indication of the water pressure gauge at any time, when the pressure is reduced, the first valve needs to be opened again to pressurize the pressure bag, otherwise, the pressure is unstable, so that the rubber in the pressure bag flows unsmoothly, air gaps are generated on the local part of the adhesive tape, and the quality of the vulcanized adhesive tape is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a pressurization and pressure maintaining device of an underground vulcanizer and a pressurization, pressure regulation and pressure maintaining method thereof, which are convenient for pressure regulation and pressure maintaining.

In order to solve the technical problem, the pressurizing and pressure maintaining device of the underground vulcanizer comprises a pressure bag, a water inlet pipe, a water inlet valve, a water return pipe, a water return valve and a pressure gauge, wherein one end of the water inlet pipe is communicated with the pressure bag, the other end of the water inlet pipe is communicated with a 4 MPa high-pressure water source commonly used underground, the water inlet valve is arranged on the water inlet pipe, the water return pipe is communicated with the water inlet pipe at the downstream of the water inlet valve, the water return valve is arranged on the water return pipe, and the pressure gauge is communicated with the water: the water inlet valve is arranged on a water inlet pipe between the water inlet valve and the water return pipe, the stepped piston pressure adjusting mechanism comprises a shell and a stepped piston rod, the stepped piston rod comprises a thick cylinder and a thin cylinder which are coaxially and fixedly connected, the ratio of the cross section areas of the thick cylinder and the thin cylinder is equal to 4: 1.8, a thick cylinder cavity and a thin cylinder cavity are arranged in the shell, the inner ends of the thick cylinder cavity and the thin cylinder cavity are communicated, the central lines of the thick cylinder cavity and the thin cylinder cavity coincide, the stepped piston rod is arranged in the shell, the shell side wall at the outer end of the thick cylinder cavity and the shell side wall at the outer end of the thin cylinder cavity are respectively provided with an interface, the interface of the thick cylinder cavity is communicated with the water inlet pipe between the second water inlet valve and the water return pipe through the rear valve and a matched pipeline and a tee joint, the interface of the thin cylinder cavity is communicated with the water inlet pipe between the second water inlet valve and the water inlet valve through the, annular caulking grooves are formed in the thick cylinder body and the thin cylinder body respectively, and O-shaped sealing rings are arranged in the annular caulking grooves.

By the design, the pressure in the pressure bag can be maintained at 1.8 MPa, and the vulcanization quality of the adhesive tape is effectively ensured.

Preferably, a branch pipe is further arranged on the water inlet pipe at the downstream of the water return pipe, a valve is arranged on the branch pipe, the outer end of the branch pipe is communicated with a safety valve, and the tripping pressure of the safety valve is 2.0 MPa. By such design, the faults such as deformation of the pressure bag caused by over pressurization can be prevented.

The invention relates to a pressurizing, pressure regulating and pressure maintaining method of a pressurizing and pressure maintaining device of an underground vulcanizer, which comprises the following steps:

pressurizing: firstly, ensuring that the front valve, the rear valve and the water return valve are in a closed state, then opening the second water inlet valve, and then slowly opening the water inlet valve, so that water can be injected into the pressure bag for pressurization;

regulating pressure: when the pressure gauge displays that the internal pressure of the pressure bag reaches 1.9 MPa, the second water inlet valve is closed, the front valve and the rear valve are opened, the stepped piston rod moves towards the thin cylindrical cavity, the liquid in the pressure bag is reduced, and the pressure in the pressure bag is reduced and kept at 1.8 MPa;

pressure maintaining: when the pressure of the pressure package drops, the stepped piston rod moves towards the thick cylindrical cavity to supplement liquid into the pressure package, so that the pressure in the pressure package rises and is kept at 1.8 MPa.

The pressurization and pressure maintaining device of the underground vulcanizer and the pressurization, pressure regulation and pressure maintaining method thereof have the advantages of simple structure, good pressurization and pressure maintaining effect and convenient use, and are suitable for pressurization and pressure maintaining of the underground vulcanizer of the coal mine.

Drawings

The invention further discloses a pressurizing and pressure maintaining device of an underground vulcanizer and a pressurizing, pressure regulating and pressure maintaining method thereof by combining the following drawings:

FIG. 1 is a schematic structural diagram of the pressurizing and pressure maintaining device of the downhole vulcanizer (the stepped piston pressure adjusting mechanism is sectioned along a vertical bisection plane).

In the figure: 1 is a pressure bag, 2 is a water inlet pipe, 3 is a water inlet valve, 4 is a water return pipe, 5 is a water return valve, 6 is a pressure gauge, 7 is a second water inlet valve, 8 is a front valve, 9 is a rear valve, 10 is a shell, 101 is a thick cylindrical cavity, 102 is a thin cylindrical cavity, 11 is a thick cylindrical body, 12 is a thin cylindrical body, 13 is a connector, 14 is a matched pipeline, 15 is a tee joint, 16 is an O-shaped sealing ring, 17 is a branch pipe, 18 is a valve, and 19 is a safety valve.

Detailed Description