Orifice device for grouting drilling in coal mining

Abstract

The utility model discloses an orifice device for grouting and drilling in coal mining, which is characterized by comprising a feed pipe, a discharge pipe, a blow-down pipe, a communicating device, a pressure sensor and a PLC (programmable logic controller), the discharging end of the feeding pipe is communicated with the feeding end of the blow-down pipe through a communicating device; a feeding valve is arranged on the feeding pipe, and an emptying valve is arranged on the emptying pipe; the feeding end of the discharging pipe is communicated with the discharging opening of the communicating device through a discharging valve; a pressure sensor is fixedly arranged at a top opening of the communicating device; the feeding valve, the discharging valve, the emptying valve and the pressure sensor are all electrically connected with the PLC. The automatic grouting device has the advantages that the automation degree is high, a valve of the orifice device is controlled to be started and stopped through the PLC, the working intensity of workers is effectively reduced, and meanwhile the grouting operation efficiency is improved; and the upper portion of the orifice device communicates with the safety pipe through the safety valve, when the pressure sensor monitors that the pressure value exceeds the preset value, pressure relief is conducted through the safety valve, and the safety of grouting operation is improved.

Description

Technical field:

[0001] The utility model relates to the field of coal mining grouting drilling, in particular to an orifice device for coal mining grouting drilling. Background technology:

[0002] A large amount of gangue waste is generated during coal mining. Gangue not only occupies land, but also pollutes the air and soil. Therefore, it is necessary to effectively treat the gangue. Grouting filling is an effective means of treating gangue. Its basic process is as follows: drilling holes from the ground to form grouting holes, connecting the surface and underground space; sealing and connecting the orifice device at the entrance of the grouting hole; slurrying the gangue and injecting it into the goaf through the orifice device. In this process, the orifice device plays an important role in the stable operation of the grouting work.

[0003] At present, the orifice device has the following problems: (1) The degree of automation of the orifice device is low, and the valve needs to be manually controlled during the grouting process, which increases the workload of the staff; (2) The pipeline resistance generated when the slurry passes through the grouting borehole is not fully considered, so that the pumping efficiency is directly affected by the excessive pipeline resistance during grouting; (3) The discharge pipe is directly connected to the grouting borehole. Due to the pressure in the grouting borehole, when the pressure sensor is damaged, it is difficult to replace the pressure gauge, which seriously affects the grouting operation. Utility model content:

[0004] The utility model aims to provide a hole device with high automation and capable of improving grouting safety.

[0005] The utility model is implemented by the following technical scheme: an orifice device for grouting drilling in coal mining, comprising a feed pipe, a discharge pipe, a vent pipe, a connecting device, a pressure sensor, and a PLC controller; the discharge end of the feed pipe is connected with the feed end of the vent pipe through the connecting device; a feed valve is provided on the feed pipe, and a vent valve is provided on the vent pipe; the feed end of the discharge pipe is connected with the discharge port of the connecting device through the discharge valve; the pressure sensor is fixedly provided on the outer side of the top wall of the connecting device; the feed valve, the discharge valve, the vent valve, and the pressure sensor are all electrically connected to the PLC controller.

[0006] Preferably, the connecting device is a barrel body with an opening on the side wall, the top of the barrel body is sealed, and the bottom of the barrel body is provided with the discharge port; the discharge end of the feed pipe and the feed end of the vent pipe are respectively connected to the openings on the side wall of the barrel body.

[0007] Preferably, the feed end of the vent pipe is located below the discharge end of the feed pipe.

[0008] Preferably, it also includes a safety tube, a safety port is provided on the upper side wall of the connecting device, the bottom of the safety port is higher than the discharge end of the feed pipe; the safety port is connected to the safety tube through a safety valve; the safety valve is electrically connected to the PLC controller.

[0009] Preferably, one side of the feed pipe close to its discharge end is bent downward into an arc shape, and one side of the vent pipe close to its feed end is bent upward into an arc shape.

[0010] Preferably, it further comprises a temperature sensor, which is fixedly arranged on the outside of the top wall of the connecting device; and the signal output end of the temperature sensor is electrically connected to the PLC controller.

[0011] The utility model has the following advantages: high automation, the start and stop of the valve of the orifice device is controlled by a PLC controller, which effectively reduces the workload of the staff and improves the efficiency of the grouting operation; the upper part of the orifice device is connected to a safety pipe through a safety valve, and when the pressure sensor detects that the pressure value exceeds the preset value, the pressure is released through the safety valve, thereby improving the safety of the grouting operation. Description of the drawings:

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model.

[0014] Figure 2 This is a schematic diagram of the PLC controller connection of Example 1.

[0015] Figure 3 This is a schematic diagram of the structure of Example 2.

[0016] Figure 4 This is a schematic diagram of the PLC controller connection of Example 2.

[0017] Feed pipe 1, discharge pipe 2, vent pipe 3, safety pipe 4, connecting device 5, discharge port 5.1, pressure sensor 6, PLC controller 7, feed valve 8, vent valve 9, discharge valve 10, grouting borehole 11, safety port 12, safety valve 13, temperature sensor 14. Specific implementation method:

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1:

[0020] like Figure 1 The orifice device for grouting drilling in coal mining shown includes a feed pipe 1, a discharge pipe 2, a vent pipe 3, a safety pipe 4, a connecting device 5, a pressure sensor 6, and a PLC controller 7.

[0021] Specifically, the discharge end of the feed pipe 1 is connected with the feed end of the vent pipe 3 through a connecting device 5; a feed valve 8 is provided on the feed pipe 1, and a vent valve 9 is provided on the vent pipe 3; the feed end of the discharge pipe 2 is connected with the discharge port 5.1 of the connecting device 5 through a discharge valve 10; a pressure sensor 6 is fixedly provided on the outer side of the top wall of the connecting device 5; the pressure of the grouting borehole 11 is monitored by the pressure sensor 6, wherein the connection method of the pressure sensor 6 and the connecting device 5 can adopt the connection method commonly used in the field, such as fixed connection with bolts, and sealing at the connection.

[0022] In order to increase the safety of grouting, a safety port 12 is also provided on the upper side wall of the connecting device 5, and the bottom of the safety port 12 is higher than the discharge end of the feed pipe 1; the safety port 12 is connected to the safety pipe 4 through a safety valve 13; the pressure inside the grouting borehole 11 can be adjusted through the safety valve 13 and the safety pipe 4.

[0023] In order to realize the automation of the orifice device, the feed valve 8, the discharge valve 10, the vent valve 9, the safety valve 13, and the pressure sensor 6 are all electrically connected to the PLC controller 7, such as Figure 2 As shown, the start and stop of each valve is controlled by the PLC controller 7. The pressure sensor 6 transmits the monitored grouting borehole pressure signal to the PLC controller 7, and the PLC controller 7 adjusts the safety valve 13 according to the pressure signal to achieve pressure adjustment in the grouting borehole 11 in the pipe.

[0024] Furthermore, in this embodiment, the connecting device 5 is a barrel body with an opening on the side wall, the top of the barrel body is sealed, and the bottom of the barrel body is provided with a discharge port 5.1; the discharge end of the feed pipe 1 and the feed end of the vent pipe 3 are respectively connected to the openings on the side wall of the barrel body, and the feed end of the vent pipe 3 is located below the discharge end of the feed pipe 1.

[0025] In order to reduce the resistance of the slurry in the grouting borehole 11, the side of the feed pipe 1 close to its discharge end is bent downward into an arc shape, and the side of the vent pipe 3 close to its feed end is bent upward into an arc shape.

[0026] Embodiment 2:

[0027] The overall structure of this embodiment is the same as that of embodiment 1, except that Figure 3-4 As shown, it also includes a temperature sensor 14, which is fixedly arranged on the outer side of the top wall of the connecting device 5; the signal output end of the temperature sensor 14 is electrically connected to the PLC controller 7. The connection method of the temperature sensor 14 and the connecting device 5 can adopt the connection method commonly used in the art, such as using a patch temperature sensor 14, and fixing the patch temperature sensor 14 on the outer side of the top wall of the connecting device 5.

[0028] The temperature at the orifice of the grouting borehole 11 is monitored by the temperature sensor 14 to prevent freezing and cracking of the pipeline caused by grouting in extreme weather.

[0029] Instructions for use: When using the orifice device of the utility model, connect the discharge end of the discharge pipe 2 to the orifice of the grouting borehole 11 and do a good job of sealing. The PLC controller 7 receives the qualified feeding signal of the slurry feeding station, and then the orifice device is put into use.

[0030] In the grouting preparation stage, the slurry sent out by the slurry feeding station is usually unqualified. At this time, the PLC controller 7 does not receive the qualified feeding signal, so the PLC controller 7 controls the feed valve 8 and the vent valve 9 to open, and controls the discharge valve 10 to be in a closed state, so that most of the unqualified slurry is discharged from the vent pipe 3. When the PLC controller 7 receives the qualified feeding signal, the PLC controller 7 controls the vent valve 9 to close and the discharge valve 10 to open, and the slurry is injected into the grouting borehole 11 through the discharge pipe 2.

[0031] During the grouting process, the pressure sensor 6 monitors the pressure in the grouting borehole 11 in real time and transmits the pressure signal to the PLC controller 7. When the monitored pressure value exceeds the normal grouting preset value, the PLC controller 7 controls the safety valve 13 to open and release the pressure. When the pressure returns to normal, the PLC controller 7 controls the safety valve 13 to close.

[0032] The temperature sensor 14 monitors the pressure at the orifice of the grouting borehole 11 in real time and transmits the temperature signal to the PLC controller 7. When the monitored temperature value exceeds the preset value, the grouting operation is stopped.

[0033] In addition, the PLC controller 7 can be connected to the centralized control center of the coal mine for communication, and remote operation can be achieved through the centralized control center.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An orifice device for grouting drilling in coal mining, characterized in that: Including feed pipe, discharge pipe, vent pipe, connecting device, pressure sensor, PLC controller; The discharge end of the feed pipe is connected to the feed end of the vent pipe through the connecting device; the feed pipe is provided with a feed valve, and the vent pipe is provided with a vent valve; The feed end of the discharge pipe is connected to the discharge port of the communication device through a discharge valve; The pressure sensor is fixedly arranged on the outer side of the top wall of the communication device; The feed valve, the discharge valve, the vent valve, and the pressure sensor are all electrically connected to the PLC controller.

2. The orifice device for grouting drilling in coal mining according to claim 1, characterized in that: The communication device is a barrel body with an opening on the side wall, the top of the barrel body is sealed, and the bottom of the barrel body is provided with the discharge port; The discharge end of the feed pipe and the feed end of the vent pipe are respectively communicated with the openings on the side wall of the barrel body.

3. The orifice device for grouting drilling in coal mining according to claim 2, characterized in that: The feed end of the vent pipe is located below the discharge end of the feed pipe.

4. The orifice device for grouting drilling in coal mining according to claim 3, characterized in that: Also includes safety tube, A safety port is provided on the upper side wall of the connecting device, and the bottom of the safety port is higher than the discharge end of the feed pipe; the safety port is connected to the safety pipe through a safety valve; The safety valve is electrically connected to the PLC controller.

5. The orifice device for grouting drilling in coal mining according to claim 3 or 4, characterized in that: The side of the feed pipe close to the discharge end thereof is bent downward into an arc shape, and the side of the vent pipe close to the feed end thereof is bent upward into an arc shape.

6. A coal mining grouting drilling orifice device according to any one of claims 1 to 4, characterized in that: Also includes temperature sensor, The temperature sensor is fixedly arranged on the outer side of the top wall of the communication device; The signal output end of the temperature sensor is electrically connected to the PLC controller.

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