CN211901122U - Closed pump station for scraper conveyor - Google Patents

Abstract

The utility model discloses a closed pump station for scraper conveyor, including pressure filter, overflow valve, flushometer, relief valve, oil supplementing check valve, plunger pump assembly, valves, proportional valve, variable hydro-cylinder, oil supplementing pump, oil return filter, hydraulic tank, cooler, first business turn over hydraulic fluid port, second business turn over hydraulic fluid port, flushing fluid port and oil return opening. The utility model discloses closed pump station for scraper conveyor, through filling closed pump station by the oil absorption of fuel feeding pump, the plunger pump drives motor drive scraper conveyor operation, the proportional valve is to changing control pressure size and direction through input current, the proportional valve action on the thrust pump, the pressure size at change variable hydro-cylinder both ends, the discharge capacity of control plunger pump, change scraper conveyor's output rotational speed, play the effect of electrodeless speed governing, this structure has can use under the overload condition for a long time and need not shut down the maintenance, can accurate monitoring load size, the characteristics of rotational speed power even etc..

Description

Closed pump station for scraper conveyor

Technical Field

The utility model relates to a scraper conveyor technical field specifically is a closed pump station for scraper conveyor.

Background

The scraper conveyor is commonly called as an electric scraper-trough conveyer or a scraper-trough conveyer, plays roles of bearing, transporting coal, guiding a coal mining machine, supporting a pushing hydraulic support and the like in a fully mechanized mining face, can adapt to a use environment with uneven floor due to the fact that a machine body of the scraper conveyor is short and firm and can be bent vertically and horizontally, so that the scraper conveyor is widely applied to the coal mining and tunneling face, a driving device of the scraper conveyor is used as a power system of the scraper conveyor, and the reasonability and the reliability of design are crucial. At present, the scraper conveyer usually adopts the forms of double-speed motor drive, single-speed motor and hydraulic coupler drive, variable frequency motor drive and the like, and has various advantages and disadvantages in application. The hydraulic drive has the advantages of large power-mass ratio, stable operation, large-range stepless speed regulation, convenient control and maintenance and the like, is widely applied to various mechanical industries, and is still blank in the application of a scraper conveyor, but the existing hydraulic coupler is easy to spray liquid under the overload condition, needs to be stopped for liquid filling maintenance, cannot accurately monitor the load and influences the production efficiency.

Disclosure of Invention

An object of the utility model is to provide a closed pump station for scraper conveyor has can use for a long time under the overload condition and need not shut down the maintenance, the motor is not directly not connected to the organism on not fragile, can accurate control load size, rotational speed or even the characteristics of power etc. can solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a closed pump station for a scraper conveyor comprises a pressure filter, an overflow valve, a flushing valve, a safety valve, an oil supplementing check valve, a plunger pump assembly, a control valve group, a proportional valve, a variable oil cylinder, an oil supplementing pump, an oil returning filter, a hydraulic oil tank, a cooler, a first oil inlet/outlet, a second oil inlet/outlet, a flushing oil port and an oil returning port, wherein the plunger pump and the oil supplementing pump are connected in series and can be driven by a motor, two pressure oil ports of the plunger pump are respectively communicated with an A, B port of the plunger pump assembly, two ends of the oil supplementing check valve are respectively connected with an oil supplementing line and a pressure oil line, two ends of the safety valve are respectively connected with a A, B port, oil ports at two ends of the flushing valve are respectively connected with a A, B port, an oil outlet is connected with an inlet of the overflow valve, an outlet of the overflow valve is communicated with the flushing oil, the inlet of benefit oil pump connects hydraulic tank, and the export is for mending the oil circuit, connects the import of overflow valve, connects the import of valves simultaneously, provides the oil source for the valves, the export of valves is equipped with the proportional valve, the export of proportional valve is equipped with the variable hydro-cylinder, variable hydro-cylinder piston rod links to each other with the sloping cam plate of plunger pump, the last oil return filter that is equipped with of hydraulic tank, the import of oil return filter connects the cooler, the oil return opening has been seted up in the outside of cooler, A, B mouth of plunger pump assembly connects pressure filter.

Preferably, the pressure filter is externally connected with four oil ports, namely a first oil inlet/outlet port, a second oil inlet/outlet port, a flushing port and an oil return port.

Preferably, the plunger pump and the oil replenishing pump are connected in series, and the plunger pump can be driven by the motor.

Preferably, the safety valve, the oil-replenishing one-way valve and the pressure filter are respectively provided in two.

Preferably, the coolers include, but are not limited to, water cooling and air cooling.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses closed pump station for scraper conveyor, through filling closed pump station by the oil absorption of oil supplementing pump, the plunger pump drives motor drive scraper conveyor operation, pressure filter filters the pollutant in filtering closed system, the overflow valve limits the oil pressure of supplementing when oil absorption of oil supplementing pump, the flushometer washes in the motor casing, oil after washing discharges from another drain hole of motor, cool down through the cooler, the system is protected to the relief valve, fluid discharges from the relief valve when pressure exceeds relief valve settlement pressure, the maximum pressure is limited, contain one-way choke valve and proportional valve in the control valve group, the flow that the one-way choke valve injectd the entering variable cylinder, play the effect that avoids the impact to keep stable, the proportional valve is to changing control pressure size and direction through input current, the proportional valve action on the promotion pump, change the pressure size at variable cylinder both ends, the structure has the characteristics that the structure can be used for a long time under the overload condition without shutdown maintenance, a motor is not directly connected to a machine body and is not easy to damage, and the size of a load, the rotating speed and even the power can be accurately monitored.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a pressure filter; 2. an overflow valve; 3. a flush valve; 4. a safety valve; 5. an oil-supplementing one-way valve; 6. a plunger pump; 7. a plunger pump assembly; 8. a control valve group; 9. a proportional valve; 10. a variable oil cylinder; 11. an oil replenishing pump; 12. an oil return filter; 13. a hydraulic oil tank; 14. a cooler; 15. a first oil inlet and outlet; 16. a second oil inlet and outlet; 17. a flushing oil port; 18. and an oil return port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a closed pump station for a scraper conveyor comprises a pressure filter 1, an overflow valve 2, a flush valve 3, a safety valve 4, an oil-supplementing check valve 5, a plunger pump 6, a plunger pump assembly 7, a control valve group 8, a proportional valve 9, a variable cylinder 10, an oil-supplementing pump 11, an oil-returning filter 12, a hydraulic oil tank 13, a cooler 14, a first oil inlet and outlet 15, a second oil inlet and outlet 16, a flushing oil port 17 and an oil return port 18, wherein the plunger pump 6 and the oil-supplementing pump 11 are connected in series and can be driven by a motor, two pressure oil ports of the plunger pump 6 are respectively communicated with an A, B port of the plunger pump assembly 7, two ends of the oil-supplementing check valve 5 are respectively connected with an oil-supplementing path and a pressure oil path, two ends of the safety valve 4 are respectively connected with an A, B port, oil ports at two ends of the flush valve 3 are respectively connected with an A, B port, an inlet of the overflow, the two sides of the flushing oil port 17 are provided with a first oil inlet and outlet 15 and a second oil inlet and outlet 16, the inlet of the oil replenishing pump 11 is connected with a hydraulic oil tank 13, the outlet of the oil replenishing pump is an oil replenishing oil path and is connected with the inlet of the overflow valve 2, the inlet of the control valve group 8 is connected with the inlet of the control valve group 8, an oil source is provided for the control valve group 8, the outlet of the control valve group 8 is provided with a proportional valve 9, the outlet of the proportional valve 9 is provided with a variable oil cylinder 10, the piston rod of the variable oil cylinder 10 is connected with the swash plate of the plunger pump 6, the hydraulic oil tank 13 is provided with an oil return filter 12, the inlet of the oil return filter 12 is connected with a cooler 14, the outer side of the. The oil supplementing pump 11 absorbs oil and fills the closed pump station, the plunger pump 6 drives the motor to drive the scraper conveyor to operate, the pressure filter 1 filters pollutants in a filtering closed system, the overflow valve 2 limits the oil supplementing pressure when the oil supplementing pump 11 absorbs oil, the flushing valve 3 flushes the motor shell, flushed oil is discharged from the other oil drainage port of the motor and is cooled through the cooler 14, the safety valve 4 protects the system, the oil is discharged from the safety valve 4 when the pressure exceeds the set pressure of the safety valve 4 to limit the maximum pressure, the control valve group 8 comprises the one-way throttle valve and the proportional valve 9, the one-way throttle valve limits the flow entering the variable oil cylinder 10 to prevent impact from keeping stable, the proportional valve 9 changes the magnitude and direction of the control pressure through input current to push the proportional valve 9 on the pump to act to change the pressure at two ends of the variable oil cylinder 10, the displacement of the plunger pump 6 is controlled, the output rotating speed of the scraper conveyor is changed, and the stepless speed regulation effect is achieved.

The working principle is as follows: the oil supplementing pump 11 absorbs oil and fills the closed pump station, the plunger pump 6 drives the motor to drive the scraper conveyor to operate, the pressure filter 1 filters pollutants in a filtering closed system, the overflow valve 2 limits the oil supplementing pressure when the oil supplementing pump 11 absorbs oil, the flushing valve 3 flushes the motor shell, flushed oil is discharged from the other oil drainage port of the motor and is cooled through the cooler 14, the safety valve 4 protects the system, the oil is discharged from the safety valve 4 when the pressure exceeds the set pressure of the safety valve 4 to limit the maximum pressure, the control valve group 8 comprises the one-way throttle valve and the proportional valve 9, the one-way throttle valve limits the flow entering the variable oil cylinder 10 to prevent impact from keeping stable, the proportional valve 9 changes the magnitude and direction of the control pressure through input current to push the proportional valve 9 on the pump to act to change the pressure at two ends of the variable oil cylinder 10, the displacement of the plunger pump 6 is controlled, the output rotating speed of the scraper conveyor is changed, and the stepless speed regulation effect is achieved.

In summary, the following steps: the utility model discloses closed pump station for scraper conveyor, through filling closed pump station by the oil absorption of oil supplementing pump 11, plunger pump 6 drives motor drive scraper conveyor operation, pressure filter 1 filters the pollutant in filtering closed system, overflow valve 2 limits the oil supplementing pressure when oil supplementing pump 11 absorbs oil, flush valve 3 washes in the motor casing, the oil after washing is discharged from another draining port of motor, cool down through cooler 14, relief valve 4 protects the system, fluid discharges from relief valve 4 when pressure exceeds relief valve 4 set pressure, limit maximum pressure, contain one-way throttle valve and proportional valve 9 in the control valves 8, the flow that one-way throttle valve limits the entering variable cylinder 10, play the effect of avoiding strikeing and keeping stable, proportional valve 9 is to changing control pressure size and direction through input current, push the action of proportional valve 9 on the pump, the structure has the characteristics that the structure can be used for a long time under the overload condition without shutdown maintenance, a motor is not directly connected to a machine body and is not easy to damage, and the load size, the rotating speed and even the power can be accurately monitored.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a closed pump station for scraper conveyor, includes pressure filter (1), overflow valve (2), flushometer (3), relief valve (4), mend oily check valve (5), plunger pump (6), plunger pump assembly (7), valve unit (8), proportional valve (9), variable hydro-cylinder (10), mend oil pump (11), oil return filter (12), hydraulic tank (13), cooler (14), first business turn over hydraulic fluid port (15), second business turn over hydraulic fluid port (16), flushing hydraulic fluid port (17) and oil return port (18), its characterized in that: the plunger pump (6) and the oil supplementing pump (11) are connected in series and can be driven by a motor, two pressure oil ports of the plunger pump (6) are respectively communicated with A, B ports of the plunger pump assembly (7), two ends of the oil supplementing check valve (5) are respectively connected with an oil supplementing way and a pressure oil way, two ends of the safety valve (4) are respectively connected with A, B ports, oil ports at two ends of the flushing valve are respectively connected with A, B ports, an oil outlet is connected with an inlet of the overflow valve (2), an outlet of the overflow valve (2) is communicated with a flushing oil port (17), a first oil inlet and outlet (15) and a second oil inlet and outlet (16) are arranged on two sides of the flushing oil port (17), an inlet of the oil supplementing pump (11) is connected with a hydraulic oil tank, an outlet is an oil supplementing way and is connected with an inlet of the overflow valve (2) and is simultaneously connected with an inlet of the control valve group (8) to provide an oil source for the control valve group (8), and, the export of proportional valve (9) is equipped with variable hydro-cylinder (10), variable hydro-cylinder (10) piston rod links to each other with the sloping cam plate of plunger pump (6), be equipped with return oil filter (12) on hydraulic tank (13), the import of return oil filter (12) connects cooler (14), oil return opening (18) have been seted up in the outside of cooler (14), A, B mouth of plunger pump assembly (7) connects pressure filter (1).

2. The closed pump station for the scraper conveyor according to claim 1, characterized in that: the pressure filter (1) is externally connected with four oil ports, namely a first oil inlet/outlet port (15), a second oil inlet/outlet port (16), a flushing oil port (17) and an oil return port (18).

3. The closed pump station for the scraper conveyor according to claim 1, characterized in that: the plunger pump (6) and the oil supplementing pump (11) are connected in series, and the plunger pump (6) can be driven by a motor.

4. The closed pump station for the scraper conveyor according to claim 1, characterized in that: the safety valve (4), the oil supplementing one-way valve (5) and the pressure filter (1) are respectively provided with two.

5. The closed pump station for the scraper conveyor according to claim 1, characterized in that: the cooler (14) includes, but is not limited to, water cooling and air cooling.

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