CN203272093U

CN203272093U - Piston type industrial pump pumping oil cylinder reversing buffering system

Info

Publication number: CN203272093U
Application number: CN 201320257891
Authority: CN
Inventors: 黄士兵; 肖黑
Original assignee: Feny Co Ltd
Current assignee: Feny Co Ltd
Priority date: 2013-05-13
Filing date: 2013-05-13
Publication date: 2013-11-06
Anticipated expiration: 2023-05-13

Abstract

The utility model discloses a piston type industrial pump pumping oil cylinder reversing buffering system which is used for reducing impact during reversing of a pumping oil cylinder. The piston type industrial pump pumping oil cylinder reversing buffering system comprises approach switches, a controlling module and a displacement controlling valve, wherein the approach switches are arranged on a water tank to sense the positions of concrete cylinder pistons in the water tank, and the displacement controlling valve controls the displacement of a pumping oil cylinder. Each concrete cylinder piston corresponds to three approach switches and the three approach switches are arranged along the axis of the piston rod of each concrete cylinder piston, the approach switches are electrically connected with the controlling module, the controlling module is electrically connected with the displacement controlling valve and is simple in structure and low in cost. Before and after each concrete cylinder piston returns inside the water tank to pump reversing of the oil cylinder, the controlling module receives the signals of triggering the three approach switches of the concrete cylinder piston in the stroke-returning direction and in the advancing direction of the concrete cylinder piston sequentially, the displacement of the pumping oil cylinder is reduced at first and then is increased in the mode of a parabola with an upward opening, hydraulic displacement is reduced in a short time (about 0.5 second) of reversing of the pumping oil cylinder to achieve reversing buffering, power consumption generated by reversing impact of a hydraulic system is reduced, and the piston type industrial pump pumping oil cylinder reversing buffering system is environmentally friendly.

Description

A kind of piston type industrial pump pumping oil cylinder commutation buffer system

Technical field

The utility model belongs to the piston type industrial pump conveying equipment, the buffer system when relating to a kind of piston type industrial pump pumping oil cylinder commutation.

Background technique

At present, edge air gallery technology is a major reform of Coal Mining Technology, raising coal recovery rate, reduction drivage ratio, alleviation digging is taken over pressure and promoted the coal mining comprehensive benefit being significant.

What this technology was main is by piston type industrial pump, fill paste to be carried out filling by the mode of pumping to stay the lane, in large discharge capacity transfer pump, large due to flow, speed is fast, the reversing impact that the pumping oil cylinder that causes piston type industrial pump is subject to when commutation is large, on buffer problem when solving the commutation of pumping oil cylinder, prior art mostly adopts hydraulic control, causes the hydraulic system of transfer pump complicated, has increased the difficulty of producing assembling and maintenance.

The model utility content

The hydraulic system that exists for the hydraulic pressure commutation buffer system that has piston type industrial pump pumping oil cylinder now is complicated, the defective of production maintenance difficult, the utility model provides a kind of piston type industrial pump pumping oil cylinder commutation buffer system and controlling method, satisfying under the prerequisite that large discharge pump send, reduce hydraulic shock by the output discharge capacity of regulating main pump, realize that the pumping oil cylinder is without impacting commutation, the assurance system works is stable, and the hydraulic system power loss is low, and cost is low, energy-conserving and environment-protective.

The utility model adopts following technological scheme to realize: a kind of piston type industrial pump pumping oil cylinder commutation buffer system, comprise the approach switch, control module and the displacement control valve that are arranged on the interior concrete cylinder piston position of induction water tank on water tank, each concrete cylinder piston correspondence arranges three approach switchs and arranges along its piston rod axis, described approach switch is electrically connected to control module, and control module is electrically connected to the displacement control valve of pumping oil cylinder.

Approach switch corresponding to each concrete cylinder piston is arranged on same level, and the axial spacing along piston rod between adjacent approach switch is 60-110mm.

Described displacement control valve is proportional electromagnetic valve.

Control flow of the present utility model is as follows: in concrete cylinder backward stroke of the piston in water tank, during the commutation of pumping oil cylinder, at first control module receives concrete cylinder piston and triggers in the backhaul direction signal that the first approach switch sends, and controls the discharge capacity that displacement control valve reduces the pumping oil cylinder; Described control module receives concrete cylinder piston when the signal that backhaul direction triggering the second approach switch sends, and the discharge capacity of pumping oil cylinder is reduced to the 20%-50% of default discharge capacity and continues to reduce; When described control module received this concrete cylinder piston and triggers the signal that the 3rd approach switch sends, the discharge capacity of pumping oil cylinder was reduced to the 5%-20% of default discharge capacity and keeps the constant continuous service of this discharge capacity.

After the commutation of pumping oil cylinder was complete, when concrete cylinder piston began to advance, control module received concrete cylinder piston and triggers at direction of propulsion the signal that the 3rd approach switch sends, and controlled the discharge capacity that displacement control valve increases the pumping oil cylinder; Described control module receives concrete cylinder piston when the signal that direction of propulsion triggering the second approach switch sends, and the discharge capacity of pumping oil cylinder increases to the 20%-50% of default discharge capacity and continues to increase; When control module received this concrete cylinder piston and triggers the signal that first approach switch sends, the discharge capacity of pumping oil cylinder increased to default discharge capacity and keeps constant continuous service.

In pumping oil cylinder commutation process, described control module is controlled displacement control valve and is adopted a complete opening up parabolic first to reduce the discharge capacity of rear increase pumping oil cylinder.

Described control module adopts the PLC module, controls proportional electromagnetic valve as displacement control valve by analog amount.

The utility model adopts approach switch to send step by step position signal that concrete cylinder piston puts in place in backhaul to control module, the discharge capacity that control module is adjusted the pumping oil cylinder in real time realizes the buffering of pumping oil cylinder when commutation, its structure is simpler, cost is low, (approximately 0.5 second) reduces system's discharge capacity and realizes the commutation buffering within the short time of pumping oil cylinder hydraulic commutation, hydraulic system reduces because of the power loss that reversing impact produces, energy-conserving and environment-protective.

Below in conjunction with the drawings and specific embodiments, the utility model is described further.

Description of drawings

Fig. 1 is the plan view that is provided with the piston type industrial pump of the pumping oil cylinder commutation buffer system that the utility model relates to.

Fig. 2 is the water tank plan view of piston type industrial pump in Fig. 1.

Fig. 3 is the control flow chart of pumping oil cylinder before backhaul to commutation is completed in embodiment of the present utility model.

Fig. 4 is the control flow chart after in embodiment of the present utility model, the commutation of pumping oil cylinder is completed.

Fig. 5 is the displacement variation table of pumping oil cylinder in pumping oil cylinder commutation buffer system in embodiment of the present utility model.

Number in the figure: 1-left side the first approach switch (SQ1), the second approach switch (SQ3) on the left of 2-right side the first approach switch (SQ2), 3-, 4-right side the second approach switch (SQ4), 5-left side the 3rd approach switch (SQ5), 6-right side the 3rd approach switch (SQ6), 7-control module, 8-right side pumping oil cylinder Proportional valve electromagnet, 9-left side pumping oil cylinder proportional electromagnetic valve, the 10-water tank, 11-left side pumping oil cylinder, 12-right side pumping oil cylinder.

Embodiment

referring to Fig. 1 and Fig. 2, piston type industrial pump pumping oil cylinder commutation buffer system in figure, comprise and be arranged on six approach switchs that are used for responding to concrete cylinder piston position in water tank on water tank 10, control module 7 and two displacement control valves of controlling respectively left and right sides pumping oil cylinder, six approach switchs are divided into left and right two rows and are arranged on water tank both sides, each concrete cylinder piston correspondence arranges three approach switchs and is arranged on the lid of water tank 10 along its piston rod axis, axial spacing between adjacent approach switch is 60-110mm, each approach switch is electrically connected to control module 7 respectively, control module 7 be electrically connected to the displacement control valve of two pumping oil cylinders respectively.Wherein, displacement control valve adoption rate solenoid valve realizes regulating separately the discharge capacity of corresponding pumping oil cylinder, is used for receiving the signal that control module 7 is sent, and controls pumping oil cylinder displacement size, thereby the buffering purpose when reaching the commutation of pumping oil cylinder, control module 7 is the PLC module.

In conjunction with referring to Fig. 3, Fig. 4 and Fig. 5, control principle and the operating method of the pumping oil cylinder commutation buffer system in the present embodiment are as follows:

start the pumping button, the pumping oil cylinder on left side and right side is simultaneously with default discharge capacity a action, advance at right side pumping oil cylinder 12, during 11 backhaul of left side pumping oil cylinder, in left side concrete cylinder piston return arrives water tank 10, control module 7 receives left side concrete cylinder piston and triggered left side the first approach switch (SQ1) at 1 o'clock in the backhaul direction, control module 7 output signals, make left side pumping oil cylinder proportional electromagnetic valve 9 continue to reduce immediately the discharge capacity of left side pumping oil cylinder 11 according to the left one side of something of parabola shown in Figure 5, when control module 7 receives left side concrete cylinder piston and triggers left side the second approach switch (SQ3) 3, the discharge capacity of left side pumping oil cylinder 11 drops to the 20%-50% of default discharge capacity a, be 30% in the present embodiment, until receiving left side concrete cylinder piston, control module 7 triggered left side the 3rd approach switch (SQ5) at 5 o'clock, the discharge capacity of left side pumping oil cylinder 11 drops to the 5%-20% of default discharge capacity a, be 10% in the present embodiment, and maintenance continuous service 100ms, left side pumping this moment oil cylinder 11 is completed the commutation operation and is begun to advance, 12 backhauls of right side pumping oil cylinder, when control module 7 again receives left side concrete cylinder piston and triggers left side the 3rd approach switch (SQ5) 5, control module 7 output signals, make left side pumping oil cylinder proportional electromagnetic valve 9 continue to increase immediately the discharge capacity of left side pumping oil cylinder 11 according to the right one side of something of parabola shown in Figure 5, when control module 7 again receives left side concrete cylinder piston and triggers left side the second approach switch (SQ3) 3, the discharge capacity of left side pumping oil cylinder 11 is increased to the 20%-50% of default discharge capacity a again, be 30% in the present embodiment, until receiving left side concrete cylinder piston, control module 7 triggered left side the first approach switch (SQ1) at 1 o'clock, the discharge capacity of left side pumping oil cylinder 11 increases to default discharge capacity a again, and keep left side pumping oil cylinder 11 to advance with the constant discharge of a, so far complete the commutation action of giving of left side pumping oil cylinder 11.

in like manner, advance at left side pumping oil cylinder 11, during 12 backhaul of right side pumping oil cylinder, in right side concrete cylinder piston return arrives water tank 10, control module 7 receives right side concrete cylinder piston and triggered right side the first approach switch (SQ2) at 2 o'clock in the backhaul direction, control module 7 output signals, make right side pumping oil cylinder proportional electromagnetic valve 8 continue to reduce immediately the discharge capacity of right side pumping oil cylinder 12 according to the left one side of something of parabola shown in Figure 5, when control module 7 receives right side concrete cylinder piston and triggers right side the second approach switch (SQ4) 4, the discharge capacity of right side pumping oil cylinder 12 drops to the 20%-50% of default discharge capacity a, be 30% in the present embodiment, until receiving right side concrete cylinder piston, control module 7 triggered right side the 3rd approach switch (SQ6) at 6 o'clock, the discharge capacity of right side pumping oil cylinder 12 drops to the 5%-20% of default discharge capacity a, be 10% in the present embodiment, and maintenance continuous service 100ms, right side pumping this moment oil cylinder 12 is completed the commutation operation and is begun to advance, 11 backhauls of left side pumping oil cylinder, when control module 7 again receives right side concrete cylinder piston and triggers right side the 3rd approach switch (SQ6) 6, control module 7 output signals, make right side pumping oil cylinder proportional electromagnetic valve 8 continue to increase immediately the discharge capacity of right side pumping oil cylinder 12 according to the right one side of something of parabola shown in Figure 5, when control module 7 again receives right side concrete cylinder piston and triggers right side the second approach switch (SQ4) 4, the discharge capacity of right side pumping oil cylinder 12 is increased to the 20%-50% of default discharge capacity a again, be 30% in the present embodiment, until receiving right side concrete cylinder piston, control module 7 triggered right side the first approach switch (SQ2) at 2 o'clock, the discharge capacity of right side pumping oil cylinder 12 increases to default discharge capacity a again, and keep right side pumping oil cylinder 12 to advance with the constant discharge of a, so far complete the commutation action of giving of right side pumping oil cylinder 12.

above embodiment has described basic principle of the present utility model and major character and advantage of the present utility model, the technician of the industry should understand, the utility model is not restricted to the described embodiments, that describes in above-described embodiment and specification just illustrates specific works principle of the present utility model, under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, these changes and improvements all fall in claimed the utility model scope, the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. piston type industrial pump pumping oil cylinder commutation buffer system, it is characterized in that: comprise the approach switch, control module and the displacement control valve that are arranged on the interior concrete cylinder piston position of induction water tank on water tank, each concrete cylinder piston correspondence arranges three approach switchs and arranges along its piston rod axis, described approach switch is electrically connected to control module, and control module is electrically connected to the displacement control valve of pumping oil cylinder.

2. a kind of piston type industrial pump pumping oil cylinder commutation buffer system according to claim 1, it is characterized in that: approach switch corresponding to each concrete cylinder piston is arranged on same level, and the axial spacing along piston rod between adjacent approach switch is 60-110mm.

3. a kind of piston type industrial pump pumping oil cylinder commutation buffer system according to claim 1, it is characterized in that: described displacement control valve is proportional electromagnetic valve.

4. the described a kind of piston type industrial pump pumping oil cylinder commutation buffer system of any one according to claim 1-3, it is characterized in that: described control module adopts the PLC module, controls proportional electromagnetic valve as displacement control valve by analog amount.