CN212774322U

CN212774322U - Mining slip casting hydraulic pressure table protection valve

Info

Publication number: CN212774322U
Application number: CN202021602151.1U
Authority: CN
Inventors: 李国栋; 刘金玉; 单志刚; 原晨; 王�琦
Original assignee: Henan Jiao Mei Energy Co ltd
Current assignee: Henan Jiao Mei Energy Co ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-03-23
Anticipated expiration: 2030-08-05

Abstract

The utility model discloses a mining slip casting hydraulic pressure table protection valve, include: the valve comprises an upper valve body, an upper valve piston, a connecting section, a lower valve piston and a lower valve body, wherein an upper valve chamber is arranged in the upper valve body, the upper valve piston is arranged in the upper valve chamber, a lower valve chamber is arranged in the lower valve body, the lower valve piston is arranged in the lower valve chamber, and the upper valve body and the lower valve body are connected together to form a whole by the connecting section. The service life of the hydraulic pressure meter can be prolonged, the safety production is ensured, and the hydraulic pressure meter has the characteristics of convenience in use, low damage possibility, low cost and the like.

Description

Mining slip casting hydraulic pressure table protection valve

Technical Field

The utility model belongs to the technical field of colliery is mining slip casting hydraulic pressure table protection in the pit.

Background

China is the world with the largest coal yield, coal mining modes mainly include open-pit coal mining and underground coal mining, and most coal mines in China adopt an underground coal mining mode. The underground water is abundant, and during excavation of a roadway and coal mining of a working face, the conditions of bottom heave and water discharge often occur, so that normal excavation and coal mining cannot be performed. In order to ensure safe production, the bottom plate needs to be grouted and reinforced, a grouting pump is needed during grouting, cement paste and slurry are pressed into a gap of a rock stratum of the bottom plate under certain pressure to be filled and solidified, the overall strength of the bottom plate is increased, and the grouting degree and the sound standard are judged according to the grouting pressure displayed by a hydraulic pressure meter. At present when carrying out the slip casting reinforcement to the bottom plate rock stratum, the hydraulic pressure table is installed on the grouting pump, because the slip casting medium is grout and mud, in the medium scurried the hydraulic pressure table easily, cement mud solidifies easily, can cause the influence to the accurate demonstration of hydraulic pressure table, damages frequently, then 24 hours for long, then 8 hours for short, just must change the hydraulic pressure table, often influences normal slip casting, and maintenance cost is still high. At present, no mining grouting hydraulic gauge protection device exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mining slip casting hydraulic pressure table protection valve that is not fragile, the expense is lower, can prolong hydraulic pressure table life.

In order to realize the above purpose, the utility model discloses a: the valve comprises an upper valve body, an upper valve piston, a connecting section, a lower valve piston and a lower valve body, wherein an upper valve chamber is arranged in the upper valve body, the upper valve piston is arranged in the upper valve chamber, the lower valve chamber is arranged in the lower valve body, the lower valve piston is arranged in the lower valve chamber, and the upper valve body and the lower valve body are connected together to form a whole by the connecting section.

When the hydraulic pressure gauge is used, hydraulic oil is filled in the upper valve chamber, then the hydraulic pressure gauge is installed at the upper end of the upper valve body, and the lower end of the lower valve body is connected to the grouting pump. When the grouting pump normally performs grouting, grouting liquid enters the lower valve chamber, pressure transmission is performed on the lower valve piston, the lower valve piston moves to conduct to the upper valve piston, at the moment, the upper valve piston compresses hydraulic oil along with movement, the hydraulic oil enters the hydraulic pressure meter, the pointer in the meter starts to swing, and the grouting pressure is displayed. Because the lower valve piston and the upper valve piston have two sealing functions, the grouting liquid can be effectively controlled not to directly enter the hydraulic meter, and the full protection effect on the hydraulic meter is fully realized. Even if the lower valve piston is damaged, the hydraulic meter is not affected, the lower valve piston can be replaced in time, and the maintenance cost is low. The service life of the hydraulic pressure meter can be prolonged, the safety production is ensured, the material cost is reduced, and the hydraulic pressure meter has the characteristics of convenience in use, difficulty in damage, lower cost and the like.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

the reference numerals are explained below:

1-an upper valve chamber; 2-an upper valve body; 3-an upper valve piston; 4-a connecting segment; 5-lower valve piston; 6-lower valve body; 7-a lower valve chamber; 8-sealing ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As can be seen from fig. 1, the present invention includes: the valve comprises an upper valve body 2, an upper valve piston 3, a connecting section 4, a lower valve piston 5 and a lower valve body 6. An upper valve chamber 1 is arranged in the upper valve body, an upper valve piston 3 is arranged in the upper valve chamber, the upper valve piston is cylindrical, a sealing ring 8 is sleeved on the upper valve piston, and the upper valve chamber 1 and the upper valve piston 3 are matched with each other to ensure that the upper valve piston can move and play a role in sealing in the upper valve chamber. The lower valve body is internally provided with a lower valve chamber 7, a lower valve piston 5 is arranged in the lower valve chamber, the lower valve piston is cylindrical, a sealing ring 8 is sleeved on the lower valve piston, and the lower valve chamber 7 and the lower valve piston 5 are matched with each other to ensure that the lower valve piston can move and play a role in sealing in the lower valve chamber. The connecting section 4 is a round tubular structure, the inner space of the connecting section is matched with the upper valve piston and the lower valve piston, screw threads are arranged outside the two ends of the connecting section, and the upper valve body 2 and the lower valve body 6 are connected together by the connecting section 4 to form a whole. The upper end of the upper valve body is provided with an inner sleeve screw thread for connecting a hydraulic gauge; and the lower end of the lower valve body is provided with an outer sleeve screw thread for connecting a grouting pump. The utility model discloses a series of products can be made according to the model of grouting pump to the specification size, and all parts adopt steel material manufacturing to guarantee that its is withstand voltage and mechanical strength satisfies the slip casting requirement.

Claims

1. A mining slip casting hydraulic pressure gauge protection valve includes: the valve is characterized in that an upper valve chamber (1) is arranged in the upper valve body, the upper valve piston (3) is arranged in the upper valve chamber, a lower valve chamber (7) is arranged in the lower valve body, the lower valve piston (5) is arranged in the lower valve chamber, and the upper valve body (2) and the lower valve body (6) are connected together to form a whole through the connecting section (4).