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Plunger type high-pressure water pump system and high and low-pressure mode switching method thereof

A high-pressure water pump, mode switching technology, applied in pump control, liquid variable capacity machinery, machine/engine, etc., can solve the problems of complex construction site conditions, inability to meet speed and accuracy, and achieve optimal coordination and fast response. effect of speed

Active Publication Date: 2012-04-11
BEIJING SANY HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the working conditions on the construction site are complex, relying only on human judgment and switching between high and low pressure modes cannot meet the requirements of speed and accuracy

Method used

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  • Plunger type high-pressure water pump system and high and low-pressure mode switching method thereof
  • Plunger type high-pressure water pump system and high and low-pressure mode switching method thereof
  • Plunger type high-pressure water pump system and high and low-pressure mode switching method thereof

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Experimental program
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specific Embodiment approach

[0068] This particular embodiment comprises the following steps:

[0069] Step S21) pre-store the first critical pressure value P1 for switching from the low pressure mode to the high pressure mode, and the second critical pressure value P2 for switching from the high pressure mode to the low pressure mode;

[0070] Wherein, the first critical pressure value P1 is greater than the second critical pressure value P2;

[0071] With respect to the first specific embodiment, the pre-stored critical pressure values ​​in this embodiment include the first critical pressure value P1 and the second critical pressure value P2, both of which are pre-stored in the storage unit of the controller.

[0072] Step S22) obtain the current load pressure value P';

[0073] This step is the same as the first specific implementation manner, and can be understood with reference to the above content.

[0074] Step S23) judging whether the acquired current load pressure value P' is greater than the f...

Embodiment approach

[0084] In fact, for the first specific implementation of the switching method, the order of the two steps of judging the relationship between the load pressure value and the critical pressure value and judging the current working mode can be reversed. Please refer to Figure 5 and combine Figure 4 , Figure 5 It is a flow chart of the third embodiment of the high-low pressure mode switching method of the plunger type high-pressure water pump system provided by the present invention.

[0085] The high-low pressure mode switching method of the plunger type high-pressure water pump system includes the following steps:

[0086] S31) Pre-store the critical pressure value for switching between the high-pressure mode and the low-pressure mode;

[0087] S32) obtaining the current load pressure value;

[0088] S33) judging whether it is currently in the high-voltage mode; if yes, then enter step S31); otherwise, enter step S32);

[0089] S31) judging whether the current load pres...

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Abstract

The invention discloses a high and low-pressure mode switching method and a plunger type high-pressure water pump system of a plunger type high-pressure water pump. The switching method comprises the following steps of: 1) prestoring the high-pressure mode and low-pressure mode switching critical pressure values; 2) obtaining the current load pressure value; and 3) judging the relationship between the current load pressure value and the critical pressure value and judging the current working mode; returning to the step 2) when the load pressure value is greater than the critical pressure value in the high-pressure mode, or when the current load pressure value is smaller than the critical pressure value in the low-pressure mode; going to step 31) when the load pressure value is smaller than the critical pressure value in the high-pressure mode, i.e. switching to the low-pressure mode; and going to step 32) when the load pressure value is greater than the critical pressure value in the low-pressure mode, i.e. switching to the high-pressure mode. The high-pressure mode and the low-pressure mode can be automatically switched according to the load pressure, so that the requirement of pressure and flow rate is met, and the optimization matching of the high and low-pressure modes is realized.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a plunger-type high-pressure water pump system and a switching method for high and low pressure modes thereof. Background technique [0002] At present, in the fire rescue of high-rise buildings, the water supply height requires that the water pump can generate higher pressure. The pressure generated by the plunger high-pressure water pump system driven by the double-piston cylinder can be greater than 10MPa, and the theoretical water supply height can reach more than 900 meters. The supply of fire water source for super high-rise buildings. [0003] The double-piston cylinder plunger type high-pressure water pump system includes two main cylinders and two water cylinders. The two main cylinders move in opposite strokes to drive the two water cylinders to absorb water and pump water outward. The main oil cylinder has a rodless chamber and a rod chamber. When the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/00
Inventor 陈铭魏志魁徐国荣王仕国石祥刘峰
Owner BEIJING SANY HEAVY MASCH CO LTD
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