CN204202832U - Hydraulic prop down-hole package seal checker - Google Patents

Abstract

The utility model discloses an underground sealing detection device of a single hydraulic prop, which comprises a pressure holding box (1), a one-way valve (2), a hydraulic pump station (3), a pressure sensor (4) and a signal detector (5); The pressure holding box is composed of an upper gland (12) and a lower gland (14). One end of the upper gland and the lower gland is hinged by a connecting pin (13), and the other end is connected by a bolt (7). The upper gland is opened O-shaped through hole, the lower gland is provided with a U-shaped through hole, and the through holes of the upper gland and the lower gland are coaxial, the upper gland is provided with a liquid inlet (11), and the liquid inlet is connected to the one-way valve. It is connected to the hydraulic pump station through pipelines; the pressure sensor is installed on the pipeline connecting the pressure holding box and the one-way valve, and is connected to the signal detector through cables. The device is small in size and can be easily carried underground without carrying the hydraulic prop, and can conveniently and quickly detect the sealing quality of a single hydraulic prop on the spot.

Description

Downhole seal detection device for single hydraulic prop

technical field

The utility model relates to an underground sealing detection device of a single hydraulic prop, which belongs to the technical field of detection devices.

Background technique

The single hydraulic prop is widely used in the field of underground support in coal mines, and is an important guarantee for the personal safety of mining workers. At present, single hydraulic props are used in a large amount and have strong fluidity in the coal mining process. Many hydraulic props need to be tested for sealing to ensure continuous recycling. The existing single hydraulic prop seal detection equipment is huge and cumbersome, and the rack of the pressurizing device occupies a large area, which cannot be conveniently taken underground for quick detection. During the seal detection, the hydraulic prop needs to be transported to the well and tested in the relevant testing factory area , so the existing detection methods reduce the detection and use efficiency of hydraulic props, wasting a lot of time and mine transportation resources.

Contents of the invention

Aiming at the above-mentioned problems in the prior art, the utility model provides a downhole seal detection device for a single hydraulic prop, which can conveniently and quickly carry out seal and pressure maintenance detection for hydraulic props underground.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a single hydraulic prop underground seal detection device, including a pressure holding box, a one-way valve, a hydraulic pump station, a pressure sensor and a signal detector; the pressure holding box consists of a The gland is composed of a U-shaped lower gland. One end of the upper gland and the lower gland is hinged by a connecting pin, and the other end is connected by a bolt. The upper gland has an O-shaped through hole, which is coaxial with the U-shaped hole of the lower gland. , the upper gland has a liquid inlet, the liquid inlet is connected to the one-way valve through the thread, and connected to the hydraulic pump station through the pipeline; Detector connection, pressure sensor and signal detector shell adopt isolation explosion-proof design, circuit intrinsically safe explosion-proof design, circuit adopts signal isolation and amplification.

Further, a sealing gasket, a Y-shaped sealing ring and an anti-extrusion ring are arranged inside the upper gland.

Further, a U-shaped rubber gasket is installed in the lower gland.

The beneficial effects of the utility model are: the hydraulic pump station provides hydraulic pressure to the pressure-holding box, the pressure sensor transmits the pressure signal to the signal detector, and the sealing and pressure-holding test is carried out according to the specified time. When there is leakage in the hydraulic prop, the pressure of the pressure holding box will change. Through the signal detector, the sealing quality of the hydraulic prop can be quickly and conveniently detected, and an alarm will be issued for the hydraulic prop with seal failure. The device is small in size and can be conveniently carried underground, without the need to carry the hydraulic prop, and can be inspected on the spot, and the single hydraulic prop that passes the seal quality inspection can be recycled.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the pressure holding box of the present utility model;

Fig. 3 is a structural schematic diagram of the upper gland of the pressure holding box of the present invention;

Fig. 4 is a structural schematic diagram of the lower gland of the pressure holding box of the present invention;

In the figure: 1. Pressure holding box, 2. Check valve, 3. Hydraulic pump station, 4. Pressure sensor, 5. Signal detector, 6. Nut, 7. Bolt, 8. Sealing gasket, 9. Y type Sealing ring, 10, anti-extrusion ring, 11, liquid inlet, 12, upper gland, 13, connecting pin, 14, lower gland, 15, U-shaped rubber gasket, 16, handle body, 17, flexible column.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, the single hydraulic prop downhole seal detection device includes a pressure holding box 1, a check valve 2, a hydraulic pump station 3, a pressure sensor 4 and a signal detector 5; Gland 12 and lower gland 14 are made up, and one end of upper gland 12 and lower gland 14 is hinged by connecting pin 13, and the other end is connected by bolt 7, as shown in Figure 3 and Figure 4, upper gland 12 is set O U-shaped through hole, the U-shaped lower gland 14 is provided with a U-shaped through hole, and the holes of the upper gland 12 and the lower gland 14 are coaxial, and the upper gland 12 has a liquid inlet 11, and the liquid inlet 11 is connected to the one-way The valve 2 is connected and connected to the hydraulic pump station 3 through a pipeline; the pressure sensor 4 is installed on the pipeline connecting the pressure holding box 1 and the one-way valve 2, and connected to the signal detector 5 through a cable. The housings of the pressure sensor 4 and the signal detector 5 adopt an isolation explosion-proof design, the circuit is an intrinsically safe explosion-proof design, and the circuit adopts signal isolation and amplification.

Before the sealing test, remove the top cover of the hydraulic prop, clean the surface of the live post 17 of the hydraulic prop, put the upper gland 12 on the live post 17, and push it to the handle body 16 in the axial direction; 14 turns around the connecting pin shaft 13, so that the upper and lower glands are snapped together; the lower gland 14 is connected with the upper gland 12 through nuts 6 and bolts 7 and clamped. When testing, first start the hydraulic pump station 3 to provide hydraulic pressure to the pressure holding box 1, observe the signal detector 5 to ensure that the pressure holding box 1 reaches the specified pressure; then stop the hydraulic pump station 3 to supply oil, and test the seal and pressure holding.

The pressure sensor 4 connected to the liquid inlet 11 on one side of the pressure holding box 1 can transmit the pressure signal to the signal detector 5 , and the pressure signal is conditioned and A/D converted and displayed on the signal detector 5 . Carry out the sealing and pressure-holding test according to the specified time. When the hydraulic prop leaks, the pressure of the pressure-holding box 1 will change. Through the signal detector 5, the sealing quality of the hydraulic prop can be quickly and conveniently detected, and an alarm will be issued for the hydraulic prop with seal failure.

In order to ensure the reliability of the seal, the upper gland 12 is provided with a sealing gasket 8, a Y-shaped sealing ring 9 and an anti-extrusion ring 10. The sealing gasket 8 ensures the reliable sealing of the upper gland 12 and the handle body 16, and the Y-shaped The sealing ring 9 ensures the reliable sealing between the upper gland 12 and the live column 17; the lower gland 14 is equipped with a U-shaped rubber gasket 15, and under the action of the U-shaped rubber gasket 15, the gap between the upper gland 12 and the hydraulic prop is ensured. reliable sealing. In order to accurately and quickly detect changes in sealing pressure, as shown in Figure 2, a signal conditioning module, a PLC and an embedded microcomputer are arranged inside the signal detector 5, and the three are electrically connected in sequence. The utility model can detect multiple hydraulic props at the same time, realize the synchronous sealing and pressure-holding test, and improve the detection efficiency.

Claims (4)

1. a hydraulic prop down-hole package seal checker, is characterized in that, comprises pressurize box (1), retaining valve (2), hydraulic power unit (3), pressure transducer (4) and signal detecting and measuring apparatus (5);

Pressurize box (1) is made up of upper press cover (12) and U-shaped lower cover (14), upper press cover (12) is hinged by being connected bearing pin (13) with one end of lower cover (14), the other end is connected by bolt (7), upper press cover (12) offers O shape through hole, coaxial with the U-shaped hole of lower cover (14), upper press cover (12) has inlet (11), and inlet (11) is connected with retaining valve (2), and is connected to hydraulic power unit (3) by pipeline;

Pressure transducer (4) is arranged on pressurize box (1) with on retaining valve (2) associated line, and is connected with signal detecting and measuring apparatus (5) by cable.

2. a kind of hydraulic prop down-hole according to claim 1 package seal checker, is characterized in that, is provided with gasket seal (8), y-type seal ring (9) and anti-extrusion ring (10) in described upper press cover (12).

3. a kind of hydraulic prop down-hole according to claim 2 package seal checker, is characterized in that, is provided with U-shaped rubber sheet gasket (15) in described lower cover (14).

4. a kind of hydraulic prop down-hole according to claim 1 package seal checker, is characterized in that, described pressure transducer (4) and signal detecting and measuring apparatus (5) are blast resistance construction.