SU666275A1 - Apparatus for remote control of powered mine roof suction - Google Patents

Description

The invention relates to a mechanized crepe of cleaning faces. A remote control device for the mechanized support section is known, which includes control sensors, sensors of the support section, memory elements and logical elements. A disadvantage of the known device is the large overhead time associated with the need to supply several pulses and low reliability. The closest to this invention in technical essence and the achieved result is a device for remote control of a powered support section, containing command and executive distributors and hoses for applying pressure to the next section 2. However, mine showed. testing, the indicated system has a number of flaws. When a pulse is applied, the step mechanism (and the actuator) moves only one step. The number of pulses for selecting the desired position depends on the previous position of the distributor. For example, to select position three, three impulses must be applied if the distributor is at the zero position, or one impulse if the distributor is at the two. Position, etc. Such uncertainty leads to the need to visually monitor the position of the executive distributor located in the adjacent section, which is very difficult in lava conditions. The large overhead is associated with the need to feed several pulses ,; position control of the actuator and additional modules with a command distributor. The aim of the invention is to improve the reliability and speed of remote control of a mechanized support. The goal is achieved by the fact that the actuator valve is made in the form of -logical valve elements with prohibition functions. connected between Self channels and having switching control sleeves.

The drawing schematically shows the proposed device.

At each section of the support, a distributor 1 is installed, which makes it possible to apply pressure to the adjacent section Li5o through one of the three arms 2-4, or in pairs in various combinations.

Sleeves 2-4 on the adjacent section are supplied to the executive unit

5 and are connected to the input channels.

6-8, respectively.

Executive unit 5 consists of two valves 9 and 10 with a logical function of prohibiting three valves with a logical function I. Each of the three valves with a logical function Ivklyuchen parallel to two input channels, forming three pairs with different combinations of their inclusion. With the appropriate inclusion of the valve 9 locks the piston cavities of the racks 11 downhole row and the valve 10 - rod cavity of the jacks 12 move. ki

The device provides for performing one local operation — shifting the conveyor — and six remote ones from the adjacent section: lowering the downhole row of racks, lowering the landing row of the racks, shifting the section with active support, shifting the section with the overlapped floor, spreading the bottomhole racks and spreading all the racks.

All operations are performed by the distributor 1, in which the discharge shut-off valve 13 is mounted. Thus, the dispenser switch takes place without pressure being applied.

The pressure in the sleeve 3 is supplied to the next section in the channel 7 and opens the lock of the bottom hole racks 11, and through the switch 14 enters the rod stocks 15 of the racks.

When performing various operations, the flow of fluid is as follows.

Moving the conveyor (PC position) The pressure is supplied to the porch cavity of the jack 12. Liquid is displaced from the rod cavity through valve 10, channel 8 and through sleeve 4 to the adjacent section.

Lowering the bottomhole racks and racks (position OS1). The pressure along the sleeve 3 is supplied to the next section in channel 7 and opens the hydraulic lock of the downhole row of racks C (one stand is conventionally shown in the drawing), and through the switch 14 enters the rod cavities of the racks. From the piston cavities of the struts through the hydraulic lock, valve 9, kingsh 6, sleeve 2 and distributor 1, the liquid is displaced into the drain line.

Lowering landing pads and racks (position OS2). Pressure is applied simultaneously through sleeves 2 and 3 to an adjacent section in channels 6 and 7. The valve at the outlet of the valve I is closed. stand), and through the valve OR opens the guide 5 rozamok-these racks. From the piston cavities, the fluid is forced out through the hydraulic lock, valve I, channel 8 and through sleeve 4, further into the drain line.

0 Moving the section with lowered overlap (position PS). Pressure is applied along sleeve 4, through channel 8 and through valve 10 into the rod end of the jacks. From the piston cavities, the liquid is forced out to drain through the distributor 1.

Moving the section with active support (position PP). The pressure on the sleeves 3 and 4 is simultaneously supplied to

0 channels 7 and 8 and enters through the valve 10 into the rod end of the jack. At the valve outlet AND the increased pressure on one side through the valve OR opens the hydraulic lock of the racks

5 15, on the other hand, it switches the switch 14. In this case, the rod cavities of the uprights 11 are connected to the piston ones, since the pressure in the channel 7 opens the hydraulic lock. Through the choke of the switch key 14, the piston and rod cavities of the pillars receive a constant feed with liquid. The pressure in these cavities is regulated by the force of the adjustable valve spring 9.

5 When the pressure of setting is exceeded, the excess fluid through the channel B and the sleeve 2 enters the discharge of the next section.

Thrust ram p yes racks (position PC1). Pressure is supplied through the sleeve 2, the channel 6 and through the valve 9 enters the piston cavities of the downhole rows. When this valve 10 locks the rod end of the jacks 12,

5 keeping the section from slipping.

Spacer all racks (position PC). The pressure is applied simultaneously through the sleeves 2 and 4 and enters the channels 6 and 8. The pressure at the outlet

The valve 0 and enters the piston cavities of the landing pillars. Pressure from channel 6 arrives at the posts of the customary series as in PC1.

In this case, the rod spaces of the jacks 12 of the shifters are also locked by the valve 10, which prevents the sections from sliding during the thrust.

The proposed device is free of the above disadvantages and allows one installation of the distributor to the desired position to perform any of the six remotely performed operations on the adjacent section. The device does not have servo mechanics,

5 therefore, the dimensions are reduced.

the apparatus as a whole and simplifies its design.

Claims (2)

1. Copyright certificate 254441, cl. E 21 D 23/12, 1964. 2. Copyright certificate  348746, cl. E 21 D 23/12, 1970, (11 11КП $ 1 ШШ PC act OS2 PS pp pci PC