Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
  • B08B3/02—Cleaning by the force of jets or sprays
  • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
  • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
  • B08B2203/0205—Bypass pressure relief valves

Definitions

• the invention relates to a high-pressure cleaning device with a high-pressure pump, a pressure line fed by the latter, a pressure-quantity regulation which can be actuated by means of a handle, and a pressure gauge, the pressure-sensitive element of which is arranged in the pressure line or in a space connected to the pressure line is.
• High-pressure cleaning devices of this type in which the pressure line is connected to a spray lance or special spray nozzles, can usually be set by actuating the handle of the pressure-quantity regulation in such a way that the pressure of the cleaning jet emitted corresponds to the respective requirements.
• the handle for regulating the pressure and quantity is necessary in any case for such a device. Its size results from the manageability of such a handle. which cannot therefore be of arbitrarily small construction and must in any case protrude from the housing so that it can be gripped.
• This handle which is necessary anyway, is used according to the invention to additionally accommodate the manometer, so that no additional space is required for the manometer.
• the display of the manometer is arranged under the transparent top of the handle.
• the handle is a cylindrical manometer housing, which has grips on its side wall.
• a cylindrical shaft is connected to the handle, in which there is a channel connecting the pressure gauge in the handle to the pressure line or to a space in communication with the pressure line.
• the assembly comprising the handle and shaft can be formed in one piece, it is particularly advantageous if the handle is designed as a separate part and is placed on the shaft in a sealed manner.
• the stem carries a valve body which, together with a valve seat on a bypass line connecting the pressure line to the suction line of the high-pressure pump, forms a closing valve.
• the stem lies as an actuating element on a valve body, which together with a valve seat forms a closing valve on a bypass line connecting the pressure line to the suction line of the high-pressure pump.
• FIG. 1 a schematic perspective view of a housing of a high-pressure cleaning device with a rotary handle for the pressure quantity regulation and a manometer integrated therein;
• Figure 2 is a sectional view taken along line 2-2 in Figure 1 in a high-pressure cleaning device with an overflow;
• Figure 3 is a sectional view similar to Figure 2 in a modified embodiment of a pressure and volume control
• Figure 4 a view similar to Figure 3 in a further modified embodiment of a pressure quantity control.
• the high-pressure cleaning device shown in the drawing comprises a housing 1, in which a not shown placed high pressure pump. This is carried out via a suction line 2 of cleaning liquid which is pumped into a pressure line 3 by the pump under high pressure.
• the pressure line ends in a spray lance or spray gun, which cannot be seen in the drawing, via which a jet of the desired shape can be emitted under high pressure.
• the pressure and the amount of the liquid dispensed via the pressure line 3 can be adjusted on a handle 4 protruding from the housing 1, which for example has a metering valve in the pressure line or a meterable closing valve in a bypass leading back to the suction line of the pump. Line operated.
• a handle 4 protruding from the housing 1 which for example has a metering valve in the pressure line or a meterable closing valve in a bypass leading back to the suction line of the pump.
• Line operated Very different constructions are possible here for pressure and quantity regulation in high-pressure cleaning devices, but what these designs have in common is that by actuating a handle, which is usually designed as a twist grip, the pressure and quantity of the liquid dispensed can be adjusted.
• a manometer 5 is arranged, which can be seen from the top and which indicates the pressure which prevails in the pressure line 3 itself or in a space connected to the pressure line. In this way, when setting the desired pressure and quantity values on the handle 4, the operator can immediately read these pressure values on the manometer and check and correct its adjustment. There is no additional space requirement for the manometer 5, since the handle 4 is provided in any case.
• a special embodiment of a pressure quantity regulation results from the illustration in FIG. 2.
• a housing 6 there is a cylindrical blind hole 7, through which the pressure line 8 passes.
• a bypass line 9 connects to the blind hole 7, which leads to the suction side of the high-pressure pump in a manner not shown in the drawing.
• an insert 10 is inserted in a sealed manner and has a central bore 11, the lower edge of which forms a valve seat 12. There is a valve on this valve seat
• valve body 13 which is screwed into a piston 14 displaceable in the blind bore 7.
• This piston 14 is sealed against the inner wall of the blind bore 7 by an annular seal 15, the valve body 13 is pressed against the valve seat 12 by a helical spring 16 which is supported on the one hand on the insert 10 and on the other hand on the piston 14.
• the blind hole 7 is closed on its side opposite the bypass line 9 by a screwed screw plug 17, into which a shaft 19 connected to a handle part 18 is screwed, which projects downward from the screw plug 17 and whose end face 20 is one Stop surface for the piston 14 forms.
• the shaft 19 is sealed off from the screw plug 17 by an annular seal 21, it can be screwed more or less deeply into the blind hole 7 by actuating the handle rope 18.
• an injector 22 with a constriction is inserted into the pressure line 8, in the area of which a connecting line 23 branches off, which ends in the chamber 24, which the piston 14 on the one hand and the screw plug 17 and the shaft 19 on the other hand in the blind hole 7 form.
• the shaft 19 has a longitudinal channel 25 leading from its front end to the handle part 18, which leads to the manometer 5 in the rotary handle 4 and thus connects it to the chamber 24.
• the manometer 5 indicates the pressure prevailing in the chamber 24.
• the manometer 5 is arranged in the handle part 18 such that it can be seen through a window 26 on the top of the rotary handle.
• the manometer 5 can be inserted into a blind hole 27 in an enlarged head part 28 formed in one piece with the shaft 19.
• a hood 29 provided with the transparent window 26 is drawn over this head part 28 and is formed on its outer wall 30 as a gripping surface, for example by a plurality of axially parallel ribs or the like.
• FIG. 4 differs from the embodiment of FIG. 3 essentially in that the head part 28 of the rotary handle 4 is not formed in one piece with the shaft 19, but rather forms a separate component which, for example, is screwed onto the shaft 19 and glued to it can be.
• the manometer itself can have a customary construction, it can transfer the displacement of a piston acting as a sensor to a pointer by means of mechanical deflection members, the display can be shown by a rotatably mounted pointer. ger done. In other cases, a linear display would also be possible using a correspondingly moved display element.
• pressure gauges of a known type could be used.

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• Measuring Fluid Pressure (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=6390383

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Citations (5)

• 1989
  • 1989-09-28 DE DE3932386A patent/DE3932386C1/de not_active Expired - Fee Related
• 1990
  • 1990-04-13 DE DE9004298U patent/DE9004298U1/de not_active Expired - Lifetime
  • 1990-09-19 WO PCT/EP1990/001586 patent/WO1991004804A1/de active IP Right Grant
  • 1990-09-19 DK DK90915434.6T patent/DK0494253T3/da active
  • 1990-09-19 EP EP90915434A patent/EP0494253B1/de not_active Expired - Lifetime

Patent Citations (5)

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