阅读说明：本技术 一种可调压力的冲钻两用泵车 (Pressure-adjustable pump truck for punching and drilling ) 是由 常宏振 周旭 陆从航 曹力 潘涛 于 2021-02-03 设计创作，主要内容包括：本发明涉及一种可调压力的冲钻两用泵车。包括机体,所述机体底部设有行走总成,所述机体上设置负载敏感泵和负载敏感多路控制阀,所述负载敏感多路控制阀进口通过出油管与负载敏感泵出口连通,所述出油管上设有高压过滤器；所述负载敏感多路控制阀出口与液压马达进口连接,所述液压马达连接水泵；所述液压马达出口通过回油管与油箱连接,所述回油管上设有冷却器和回油过滤器；所述负载敏感泵的控制油路上设有换向阀和溢流阀,所述溢流阀设于换向阀的出口侧。本申请通通过负载敏感泵无级调整液压马达的输出压力和流量,从而控制水泵的输出压力和流量,同时通过控制油路上的二位三通换向阀的开闭控制控制油路的最高压力来限制工作油路的最高压力。(The invention relates to a pressure-adjustable pump truck for punching and drilling. The device comprises a machine body, wherein a walking assembly is arranged at the bottom of the machine body, a load-sensitive pump and a load-sensitive multi-way control valve are arranged on the machine body, an inlet of the load-sensitive multi-way control valve is communicated with an outlet of the load-sensitive pump through an oil outlet pipe, and a high-pressure filter is arranged on the oil outlet pipe; the outlet of the load-sensitive multi-way control valve is connected with the inlet of a hydraulic motor, and the hydraulic motor is connected with a water pump; the outlet of the hydraulic motor is connected with an oil tank through an oil return pipe, and a cooler and an oil return filter are arranged on the oil return pipe; and a control oil path of the load sensitive pump is provided with a reversing valve and an overflow valve, and the overflow valve is arranged on the outlet side of the reversing valve. This application leads to output pressure and the flow through the sensitive pump stepless adjustment hydraulic motor of load to the output pressure and the flow of control water pump, the highest pressure that comes the restriction working oil circuit through the switching control oil circuit of the two-position three-way switching-over valve on the control oil circuit simultaneously.)

1. The utility model provides a dual-purpose pump truck of punching and drilling of adjustable pressure which characterized in that: the walking mechanism comprises a machine body, wherein a walking assembly is arranged at the bottom of the machine body, a load-sensitive pump and a load-sensitive multi-way control valve are arranged on the machine body, an inlet of the load-sensitive pump is connected with an oil tank, an inlet of the load-sensitive multi-way control valve is communicated with an outlet of the load-sensitive pump through an oil outlet pipe, and a high-pressure filter is arranged on the oil outlet pipe; the outlet of the load-sensitive multi-way control valve is connected with the inlet of a hydraulic motor, the hydraulic motor is connected with a water pump, and the hydraulic motor drives the water pump to work; the outlet of the hydraulic motor is connected with an oil tank through an oil return pipe, and a cooler and an oil return filter are arranged on the oil return pipe; and a control oil path of the load sensitive pump is provided with a reversing valve and an overflow valve, and the overflow valve is arranged on the outlet side of the reversing valve.

2. The dual-purpose pump truck for drilling and percussion drilling of claim 1, wherein: the load-sensitive multi-way control valves are arranged in a plurality and connected in parallel.

3. The dual-purpose pump truck for drilling and percussion drilling of claim 1, wherein: the walking mechanism further comprises two walking main valves, the two walking main valves are respectively connected with the load-sensitive multi-path control valve in parallel, and outlets of the walking main valves are respectively connected with corresponding walking motors to drive the walking assembly to act.

4. The dual-purpose pump truck for drilling and percussion drilling of claim 1, wherein: the water pump is a high-pressure water pump.

Technical Field

The invention relates to a pressure-adjustable pump truck for punching and drilling, and belongs to the technical field of pump trucks.

Background

The directional drill carriage is adopted for construction when the gas hole is pre-pumped in coal mine construction, but due to the characteristics of low permeability and low gas saturation of a coal bed, the pumping effect is common, high-pressure water jet permeability increasing is generally adopted, and hole expanding and cave building are carried out on the coal bed, so that the exposed area of a coal body is increased, pressure relief is carried out on the inner part of the coal bed, good conditions are created for gas release and flowing, and the pumping efficiency is improved.

In the drilling construction process, the mud pump truck is used as a key matched device of a directional drilling machine, and the provided liquid medium is mainly used for flushing a drilling hole, cooling and lubricating a drill bit and a drilling tool, and is used as a power medium for rotating a hole bottom motor and the like. The output flow and the pressure of the slurry pump truck determine the slag discharge capacity and the drilling efficiency of the large-diameter directional drilling machine, and determine the handling capacity of accidents such as drill embracing, drill sticking and the like of the directional drilling machine in the large-diameter and high-length drilling construction process to a great extent. The mining crawler-type slurry pump truck adopts a high-flow low-pressure water pump to drive a hole bottom screw motor to work, the hole bottom motor is easily damaged due to overhigh pressure, the highest pressure cannot exceed 12Mpa, a matched water pump is a low-pressure high-flow water pump, and serious accidents such as pump explosion and the like are easily caused due to overhigh pressure. The slurry pump truck is usually directly driven by a quantitative hydraulic motor or an electric motor, and the flow and the pressure are not controllable.

After hole forming, a slurry pump vehicle needs to be replaced by a high-pressure clean water pump station for high-pressure water jet permeability increasing construction, the clean water pump station directly drives a high-pressure small-flow water pump through a motor, and small-flow high-pressure water is provided to be used for hydraulic seam cutting and hole forming, but the pressure and the flow are also uncontrollable. The slurry pump truck and the clean water pump station need to be replaced and used alternately, the efficacy of the two devices cannot be replaced mutually, and the construction cost and the efficiency are greatly restricted.

Disclosure of Invention

The invention aims to solve the technical problem of providing a pressure-adjustable pump truck for drilling and flushing in the prior art, which can steplessly adjust the output pressure and flow of a hydraulic motor, control the output pressure and output flow of a water pump and realize different output modes. Can two kinds of equipment in direct replacement mud pump truck and clean water pump station, realized switching two kinds of operating condition with a equipment key, reduce construction cost, improve work efficiency.

The technical scheme adopted by the invention for solving the problems is as follows: a pressure-adjustable pump truck for flushing and drilling comprises a truck body, wherein a walking assembly is arranged at the bottom of the truck body, a load-sensitive pump and a load-sensitive multi-way control valve are arranged on the truck body, an inlet of the load-sensitive pump is connected with an oil tank, an inlet of the load-sensitive multi-way control valve is communicated with an outlet of the load-sensitive pump through an oil outlet pipe, and a high-pressure filter is arranged on the oil outlet pipe; the outlet of the load-sensitive multi-way control valve is connected with the inlet of a hydraulic motor, the hydraulic motor is connected with a water pump, and the hydraulic motor drives the water pump to work; the outlet of the hydraulic motor is connected with an oil tank through an oil return pipe, and a cooler and an oil return filter are arranged on the oil return pipe; and a control oil path of the load sensitive pump is provided with a reversing valve and an overflow valve, and the overflow valve is arranged on the outlet side of the reversing valve.

The load-sensitive multi-way control valves are arranged in a plurality and connected in parallel.

The walking mechanism further comprises two walking main valves, the two walking main valves are respectively connected with the load-sensitive multi-path control valve in parallel, and outlets of the walking main valves are respectively connected with corresponding walking motors to drive the walking assembly to act.

The water pump is a high-pressure water pump.

Compared with the prior art, the invention has the advantages that: the utility model provides a dual-purpose pump truck of flushing and drilling of adjustable pressure, this application passes through the sensitive pump drive hydraulic motor of load, hydraulic motor drives the work of water pump, output pressure and the flow through the sensitive pump stepless adjustment hydraulic motor of load, thereby the output pressure and the flow of control water pump, simultaneously through the switching of the two-position tee bend switching-over valve on the control oil circuit come two kinds of pressure output states of fast switch-over, the system can be in the key switch-over between high pressure and low pressure, realize different output mode, the required pressure of water pump homoenergetic output in real time and flow according to the demand of load under respective output mode.

Drawings

FIG. 1 is a schematic view of a pressure-adjustable pump truck for drilling and percussion operations according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic diagram of a hydraulic system of a pressure-adjustable pump truck for drilling and percussion operations according to an embodiment of the present invention;

in the figure, a load sensitive multi-way control valve 1, a cooler 2, an oil return filter 3, an overflow valve 4, a two-position three-way reversing valve 5, a load sensitive pump 6, a high-pressure filter 7, a hydraulic motor 8, a high-pressure water pump 9, a traveling motor 10, an oil tank 11, an oil outlet pipe 12, a control oil circuit 13, an oil return pipe 14, a traveling main valve 15, a traveling assembly 16 and a machine body 17 are arranged.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1, 2 and 3, the pressure-adjustable pump truck for drilling and punching comprises a machine body 17, a walking assembly 16 is arranged at the bottom of the machine body 17, a load-sensitive pump 6 and a load-sensitive multi-way control valve 1 are arranged on the machine body, an inlet of the load-sensitive pump 6 is connected with an oil tank 11, an inlet of the load-sensitive multi-way control valve 1 is communicated with an outlet of the load-sensitive pump 6 through an oil outlet pipe 12, a high-pressure filter 7 is arranged on the oil outlet pipe 12, and the load-sensitive pump 6 filters oil pumped out of the oil tank 11 first and then flows into the load-sensitive multi-way control valve 1. The outlet of the load-sensitive multi-way control valve 1 is connected with the inlet of the hydraulic motor 8, when the load-sensitive multi-way control valve 1 is opened, hydraulic oil is led into the hydraulic motor 8 through the load-sensitive multi-way control valve 1, and the hydraulic motor 8 works. The hydraulic motor 8 is connected with the high-pressure water pump 9, and the hydraulic motor 8 drives the high-pressure water pump 9 to work, so that the high-pressure water pump outputs high-pressure fluid, and the pressure is more than 20 Mpa. The outlet of the hydraulic motor 8 is connected with the oil tank 11 through an oil return pipe 14. The oil return pipe 14 is provided with a cooler 2 and an oil return filter 3, and hydraulic oil in the oil return pipe 14 is cooled and filtered and then returns to the oil tank 11, so that the hydraulic oil can be recycled. The control oil circuit 13 of the load sensitive pump 6 is provided with a two-position three-way reversing valve 5 and an overflow valve 4, the overflow valve 4 is arranged on the outlet side of the two-position three-way reversing valve 5, and when the two-position three-way reversing valve 5 is communicated, the overflow valve 4 limits the pressure of the control oil circuit 13, so that the system can be switched between high pressure and low pressure.

The two load-sensitive multi-way control valves 1 are connected in parallel, the output flow of the hydraulic motor 8 is increased, and when the two-position three-way reversing valve 5 is not conducted, the load-sensitive pump 6 adjusts the output pressure and flow of the hydraulic motor 8 to obtain high-pressure small flow and high-pressure large flow; when the two-position three-way reversing valve 5 is switched on, the overflow valve 4 limits the maximum pressure of hydraulic oil, so that low-pressure small flow and low-pressure large flow are obtained when the load sensitive pump 6 adjusts the output pressure and flow of the hydraulic motor 8.

The load-sensitive multi-way control valve 1 is also connected in parallel with the two walking main valves 15, so that 4 control valves are connected in parallel. The traveling main valves 15 are connected to the traveling motors 10 at the outlets thereof, and the traveling main valves 15 drive the corresponding traveling motors 10 respectively, and the traveling motors 10 rotate in opposite directions, i.e., the two traveling motors 10 rotate in one forward direction and one reverse direction to drive the traveling assembly to move.

When the system needs high pressure, the two-position three-way reversing valve is not conducted, and the load-sensitive multi-way control valve controls the load-sensitive pump to automatically output the pressure and the flow according to the pressure and the flow needed by the hydraulic motor. When the system needs low pressure, the two-position three-way reversing valve is conducted, the overflow valve limits the maximum pressure of hydraulic oil, so that the maximum pressure of the whole hydraulic system is limited, the pressure of the hydraulic motor is limited, the pressure is reduced, and the output water pressure of the high-pressure water pump is naturally reduced. This application drives hydraulic motor through the sensitive pump of load, and hydraulic motor drives the work of water pump, through the output pressure and the flow of the sensitive pump stepless adjustment hydraulic motor of load to the output pressure and the flow of control water pump, through the switching of the two-position tee bend switching-over valve on the control oil circuit, the system can switch between high pressure and low pressure, realizes the output of high-pressure large-traffic, high-pressure little flow, low pressure large-traffic and low pressure little flow, reaches different output modes. This application can two kinds of equipment in direct replacement mud pump truck and clean water pump station, has realized switching two kinds of operating condition with an equipment key, has reduced construction cost, has improved work efficiency.

In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.