DE112011104821T5 - Pressure measuring and pressure measuring device - Google Patents

Abstract

The invention relates to an electronic data acquisition 1, which detects operating pressure and number of opening operations and closing operations of a telescopic cylinder 3. The electronic data acquisition comprises a driven by a shaft pump 6, which promotes hydraulic fluid from a tank 7 in the telescopic cylinder 3, wherein the shaft is driven by a motor 5 of a dump truck. Depending on the movement of the hydraulic fluid is determined by means of pressure sensors and a measuring board, how often and under what pressure the telescopic cylinder 3 was operated. The invention further relates to a pressure gauge and a pressure value acquisition device with an information screen 2 for displaying the pressure readings provided by the electronic data acquisition unit 1. The information screen indicates in which time intervals the telescopic cylinder 3 has been operated and how often in the telescopic cylinder 3 pressure readings have exceeded a certain pressure.

Description

Technical area

The invention generally relates to a pressure gauge and a pressure sensing device which collects, processes and displays pressure values, the pressure values being provided by a system.

In particular, the invention comprises an electronic pressure measuring device which indicates the operating pressure and counts opening and closing operations of the telescopic cylinders, which are provided in tilting switches and are operated under maximum load. The operating pressure and the number of opening and closing operations are displayed on an information screen, and the invention is intended to be used to detect occurring sources of error in telescopic cylinders.

State of the art

In the prior art telescopic cylinders are known, which are used to lift and carry cargoes. A tilting unit for lifting and carrying a load is provided in a rear part of a dump truck. In these telescopic cylinders, pressure changes occur with respect to opening operations and closing operations while they are operated and opened by the pressurized hydraulic fluid.

These pressure changes result in malfunctions that occur in or with the telescoping cylinders. The cause of the error can not be determined. For adequate monitoring and control of these pressure changes, no device is available in the relevant technical field which is used to detect the source of the error. If a maximum operating pressure is exceeded in hydraulic systems, due to the high pressure malfunction on the telescopic cylinder and other hydraulic units. The main reason for a malfunction in the system are the pressure values that occur due to overloading or overcharging. With the device according to the invention, the system pressure is measured every second and the measured pressure values are stored. As soon as a problem or malfunction occurs in the system, the pressure readings collected in the system are considered and a determination is made as to whether or not the system is operating under appropriate conditions. As a result, there is a need for devices that compensate for the disadvantages of the existing state of the art by measuring pressure changes in telescopic cylinders, where the inadequacy of existing solutions requires improving the related art.

Object and purpose of the invention

The present invention relates to an electronic pressure gauge and to an electronic pressure sensing device which meets the above requirements. The invention overcomes all the disadvantages and inadequacies, with some additional advantages being achieved according to the invention.

An object of the invention is an electronic pressure gauge which is able to determine where and where a malfunction of the telescopic cylinder originates.

Another object of the invention is to develop a pressure measuring system which processes pressure data received from a system.

A further purpose of the invention is to specify operating pressure values and, in the case of maximum load, to indicate the number of opening and closing operations of telescopic cylinders which are used in tilting switches.

Another purpose of the invention is to determine whether or not a telescopic cylinder is covered by the manufacturer's warranty, as the invention counts and stores the total number of opening and closing operations of the telescopic cylinder.

Another purpose of the invention is to be able to determine how often the tilting unit has been raised or lowered. This determination is made by means of the invention and a corresponding computer software.

Another purpose of the invention is to display, on an information screen, the temperature and degree of soiling of a hydraulic fluid held in a reservoir or tank, reading out the data collected by the sensors mounted in the system.

The realization of the advantages listed above results from the present invention, which describes a pressure measuring device and a pressure-value acquisition device in the following. The pressure measuring device and pressure value acquisition device according to the invention determines the operating set pressure values and the number of opening and closing operations of the telescopic cylinders. In the pressure measuring unit according to the invention and pressure value detection device, a pump is provided which is driven by a motor of a dump truck and promotes the hydraulic fluid in response to their movement from a tank into a telescopic cylinder.

• – eine elektronische Datenerfassung, welche mittels der Drucksensoren misst, wie oft die Teleskopzylinder bei welchem Druck betätigt wurden und die Messwerte auf einer speziell entwickelten Messplatine abspeichert,
• – einen Informationsbildschirm, auf welchem die von der elektronischen Datenerfassung erfasste Information angezeigt wird und welcher fortwährend angibt, unter welchem Druck und in welchen Zeitintervallen der Teleskopzylinder betätigt wurde; wie oft ein vorher festgelegter Grenzwert des Drucks überschritten wurde; der aktuelle Druck im System, welche von den Drucksensoren ermittelt wurde und von den Sensoren, welche den Verschmutzungsgrad der Hydraulikflüssigkeit bestimmen; die Anzahl der Hebe- und Senkvorgänge; und die Messwerte des Verschmutzungsgrads der Hydraulikflüssigkeit im Reservoir bzw. im Tank anzeigt.

The invention comprises:

• An electronic data acquisition, which measures by means of the pressure sensors how often the telescope cylinders were actuated at which pressure and which stores the measured values on a specially developed measuring board,
• An information screen on which the information acquired by the electronic data acquisition is displayed and which constantly indicates under what pressure and at which time intervals the telescopic cylinder has been actuated; how many times a previously set pressure limit has been exceeded; the current pressure in the system, which was determined by the pressure sensors and the sensors, which determine the degree of contamination of the hydraulic fluid; the number of lifting and lowering operations; and the measured values of the degree of contamination of the hydraulic fluid in the reservoir or in the tank indicates.

• – Förderung der in einem Reservoir gespeicherten Hydraulikflüssigkeits zum System durch eine Pumpe,
• – Weiterleitung der unter Druck stehenden Hydraulikflüssigkeit an den Teleskopzylinder durch eine angetriebene Welle,
• – Öffnen und Schließen des Teleskopzylinders durch Kompression der mit Druck behafteten Hydraulikflüssigkeit innerhalb des Teleskopzylinders,
• – Aufzeichnung der Daten im Hinblick auf Änderung des Drucks, welche von den Öffnungs- und Schließvorgängen herrühren,
• – Visualisierung der aufgenommenen Daten.

The realization of the advantages just listed is supported by the description below. The present invention relates to a method for operating a pressure gauge and a recording unit, as well as for monitoring the operating pressure and for determining the number of opening and closing operations of the telescopic cylinder, wherein a pump delivers the hydraulic fluid from the reservoir to the telescopic cylinder. The pump is driven by a shaft which is connected to a motor of a dump truck. The following steps are planned:

• Conveying the hydraulic fluid stored in a reservoir to the system by a pump,
• - Forwarding the pressurized hydraulic fluid to the telescopic cylinder by a driven shaft,
• Opening and closing of the telescopic cylinder by compression of the pressurized hydraulic fluid within the telescopic cylinder,
• Recording the data with regard to changes in pressure resulting from the opening and closing operations,
• - Visualization of the recorded data.

The structural and characterizing features of the invention and all advantages thereof will be more clearly understood with reference to the drawings. The drawing will be briefly described below, with the detailed description referring to the drawing. Therefore, an evaluation should consider both the drawing and the detailed description.

Short description of the drawing

For the understanding of the embodiment of the present invention and all its advantages, this should be best appreciated together with the drawings and the description given below.

1 Figure 3 is a schematic view of the operation of the electronic pressure gauge and the electronic data acquisition unit of the present invention within the given system.

2 is a schematic view of the electronic data acquisition on the electronic pressure measuring device and the electronic recording unit.

3 Fig. 12 is a schematic view of the external application of the electronic pressure gauge and the electronic detection unit according to the present invention.

In view of the details that are not necessary to understand the invention and are therefore not shown, it is not absolutely necessary that the drawings are to scale. Furthermore, the elements which are at least substantially identical or at least have substantially identical functions are designated by the same number.

Detailed description of the invention

In this detailed description, preferred embodiments of the electronic measuring and detecting unit according to the invention are described, this description is only for a better understanding of the subject and does not limit the inventive idea.

1 shows a schematic view of the operation of the electronic pressure gauge A according to the invention within a given system. The electronic pressure gauge A is used to measure and record pressure while the system is being moved. Pressure changes are due to the fact that a pressurized hydraulic fluid is transported within the system. As in 3 As shown, the pressure measuring system and the detection unit comprise an information screen 2 on which the values that the electronic data collection 1 has been saved. The electronic data collection collects and records pressure changes that occur due to the movement of the pressurized hydraulic fluid in the system, the actual prevailing values being displayed in the system in real time. The digital screen or information screen of the hydraulic system shows, according to the values measured by the sensors, under what pressure the system is operated and how often it has exceeded a certain pressure limit. Furthermore, the digital screen shows in which time intervals it was actuated and the temperature and the degree of soiling of the hydraulic fluid or the hydraulic oil which is located in the oil tank. The pressure measuring and pressure-measuring device A comprises a pressure sensor which measures the pressure and transmits it to a measuring board, which has been specially developed for this system. The measurement board is able to read and record the print data. The measuring sensors, which can detect the temperature of the oil, are mounted in the oil reservoir of the system. The pressure sensor is integrated in the measuring board and can be connected to the inlet of the telescopic cylinder 4 of the system via an adapter. The pressure in the system can be detected by the pressure sensor as a 4-20 milliamp current signal. These current values are converted into pressure data of the unit bar, whereby the specially prepared measuring board is used and this data is then stored in a system via the measuring board.

The fluid, which is a hydraulic oil, is in a tank 7 intended. The system is powered by a pump 6 supplied with this fluid. The pump 6 distributes the hydraulic oil from the tank 7 to the telescopic cylinder 4 , where the pump 6 from a motor 5 is driven. The hydraulic fluid is compressed inside the telescopic cylinder 3 and causes an opening of the telescopic cylinder 3 , As a result, the charge on the telescopic cylinder 3 pushed. Therefore, there are different driving forces and different pressure values in the system. These activities cause pressure changes, which are measured and recorded. These measured data are processed and analyzed by software.

Once the hydraulic oil, which causes changes in pressure within the system, in the telescopic cylinder 3 is no longer used, it becomes the tank 7 via a directional valve 4 returned. In hydraulic systems, energy is transferred between the pump 6 and consumers, such as a telescopic cylinder, which consumes hydraulic fluid through connections and hoses designed for it. Here are valves 4 mounted as energy control units in the hoses to determine measurements. The measured quantities correspond to a force, a torque, a cycle speed, a number of cycles and a direction of movement of the expected movement of the telescopic cylinder 3 , The telescopic cylinder 3 is the user element and must be protected according to the system requirement. The valves 4 cause control or regulation of pressure and flow rate. Each valve located in the system 4 causes a resistance to the flow of the fluid.

way valves 4 are used within the system to transfer the hydraulic oil into the tank 7 to transport or the tank 7 depending on whether it is used in the telescopic cylinder piston or not used. The directional valves 4 are used to control the flow of fluid in the hydraulic lines and cause a movement direction change, or hydraulic cylinders and motors 5 to stop or start. Within the system is the directional control valve 4 the structural unit, the force caused by the fluid, which by means of the pump 6 is developed to the tank 7 or to the telescopic cylinder 3 passes.

The electronic pressure gauge is provided according to the invention, pressure changes in the telescopic cylinder 3 occur to capture. The telescopic cylinder 3 It is used in high-duty environments and includes integrated pistons with different diameters. The invention is provided on earth dredgers and dump trucks. After the pressure measurements on the telescope cylinder, the data is further processed by a program. It is determined under what pressure, how often and when the telescopic cylinder 3 was operated.

LIST OF REFERENCE NUMBERS

A

Pressure measuring and pressure measuring device

1

electronic data collection

2

information screen

3

telescopic cylinders

4

way valve

5

engine

6

pump

7

tank

Claims (2)

Pressure measuring and pressure measuring device (A), which operating pressure and number of opening operations and closing operations of a telescopic cylinder ( 3 ) comprising: a pump driven by a shaft ( 6 ), which hydraulic fluid from a tank ( 7 ) in the telescopic cylinder ( 3 ), the shaft being driven by a motor ( 5 ), characterized in that an electronic data acquisition unit ( 1 ) is provided, which determines by means of pressure sensors and a measuring board, how often and under what pressure the telescopic cylinder ( 3 ) and an information screen ( 2 ) for the representation of the electronic data acquisition unit ( 1 ) provided pressure readings is provided, indicating in which time intervals the telescopic cylinder ( 3 ) and how often in Telescopic cylinder ( 3 ) Pressure readings have exceeded a certain pressure and that a degree of contamination of the hydraulic fluid in the tank ( 7 ) indicates. Method for operating a pressure-measuring and pressure-measuring device (A), which operating pressure and number of opening operations and closing operations of a telescopic cylinder (A) 3 ), wherein by means of a pump operated by a shaft ( 6 ) Hydraulic fluid from a tank ( 7 ) in the telescopic cylinder ( 3 ) by moving the shaft through a motor ( 5 ) is driven, characterized in that the following operating steps are provided: - Promotion of in a tank ( 7 ) hydraulic fluid from the tank ( 7 ) in the telescopic cylinder ( 3 ) by means of a pump operated by a shaft ( 6 ), - recording of pressure changes, which are due to the fact that the telescopic cylinder ( 3 ) is opened and closed and that opening and closing operations by compression-loaded hydraulic fluid within the telescopic cylinder ( 3 ) occur, - visualization or pictorial representation of the recorded data.

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