Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
  • F16K5/08—Details
  • F16K5/12—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K47/00—Means in valves for absorbing fluid energy
  • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise

Definitions

• the invention re f lates to a straightway cock with a ball-.shaped or cylindrical plug, same plug having two or more flow channels being connected with each other inside the plug, a housing with two gates, a- packing ring wedged in between the housing and the plug, a handle for turning the plug around the longitudinal axis of same, and possibly a hollow support part being especially adapted for the purpose of pressing the plug against the packing ring, and which is inserted in the housing on the side of the plug which is opposite to the packing ring.
• Ball cocks are often used for the closing of pipes that lead for example to a drain cock, so that the pipe can be closed before the drain cock. Hereby it becomes possible to dismount or take apart the drain cock without fluid spillage. It will often be advantageous to use straightway cocks as in a simple manner these can be mounted to extend an exist ⁇ ing pipe.
• a closing cock is a straightway cock with a ball-shaped plug, through which a single drilling extends diametrically.
• a cock can be turned 90° between entirely open and closed position, and by turning the cock 180° from the closed position the cock will be closed again.
• the fluid can in this posi ⁇ tion flow through the flow channel, which joins the chamber under the bottom of the plug, and through the chamber to the discharge gate, so that the closing of the cock can be effected by a turn of the plug of 270° without interjacent closing areas. Because of the design of the cock it thus becomes impossible to close same so suddenly that damaging water hammers may occur.
• a cock according to the invention may as related to in claim 2 be characterized in that along the circumference of " the plug and outside the closing area there are provided a number of evenly distributed, radial flow channels with different cross sections, so that the cross section areas decrease from open towards closed position. Thus, a gradual closing of the fluid flow is obtained by turning the plug, so that any water hammers are further reduced.
• the plug on a cock according to the invention has one flow channel only at right angels to the axis of rotation, and that this flow channel is designed as a slit encircling the plug partly, the width of same slit decreasing from open towards closed position.
• a cock according to the invention may also as related to in claim 4 be characterized by radial, identical flow channels being so distributed that the distance between them is increased from open towards closed position. It is hereby obtained that all of the flow channels can be made by means of the same tool, advan ⁇ tageously by drilling.
• the outer side of the housing is provided with one or more stop pieces working together with the handle. It can hereby be prevented that the cock is closed by a turn of only 90°, as the plug must be turned the determined interval of 270° between open and closed position.
• fig. 1 shows a longitudinal section through a cock according to the invention, where the plug is in totally open positi ⁇ on,
• fig. 2 shows a sectional view through the cock from fig. 1 seen in the direction of the arrows along the line II-II
• fig . 3 shows the cock from fig . 1 in closed position
• fig. shows the cock from fig. 1 seen from above with the handle in different positions.
• Fig. 1 shows a longitudinal section through an entirely open cock according to the invention.
• the cock consists of a housing 1 with two gates 11, 12. In the house
• a substantially ball-shaped plug 2 is pivotally located.
• the plug 2 there are provided four flow channels 9, 10, one flow channel 10 of which joining the bottom of the plug 2.
• the plug 2 is in a known manner secured to a handle 4 with a connection part, same connection part extending through a hole in the housing. 1 and by means of a packing ring 5 lying tightening against said housing. Between the plug
• a flow channel 10 joins the bottom of the plug 2 so that when the cock is in its open position there is communication from the gate 12 to at least one of the flow channels 9 and further through the plug 2 to the flow channel 10, the chamber 8 and through the hollow support part 6 to the gate 11.
• the flow channels 9 in the plug 2 can advantageously be made as drilled holes with decreasing diameter from open to closed position.
• a stop piece 7 is located, same atop piece together with the handle 4 determining the turning angle. Because the rear part of the handle 4 can pass across the stop piece 7. By means of only one stop piece 7 a turning interval of 270° for the plug 2 is thus determined.
• the hollow support part 6 is used in order to ensure that the plug 2 is pressed against the packing ring 3 in a proper manner.
• Fig. 2 shows how the plug is provided with a closing area 13
• fig. 3 shows how in closed position this closing area 13 obstructs fluid passage through the cock.
• the reference number 4 indicates the position of the handle when the cock is entirely open.
• 4' ' indicates the position of the handle when the cock is closed, and position 1 ' shows the cock in a positi ⁇ on lying between entirely open and closed.
• the figure shows how the rear part of the handle 4 can move across the stop piece 7 which is firmly fixed on the housing 1, just as it shows that the handle 4 and with it the plug 2 have to be moved 270° between its extreme positions.
• the plug 2 on the drawing is shown with three radial flow channels 9 and one flow channel 10 in the bottom of the plug, it will be possible to vary the number of flow channels in a cock according to the invention in various ways, dependent on the purpose of application of the cock. For example one, slit-shaped, radial flow channel, or a large number of flow channels with small cross sections located in an advantageous pattern.
• the plug may furthermore be advan ⁇ tageous if the plug is cylindrical in stead of ball- shaped. It is also possible to locate the plug in other manners that do not require the use of the hollow support part.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Taps Or Cocks (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8113128

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (7)

• 1984
  • 1984-05-24 DK DK254684A patent/DK254684A/da not_active Application Discontinuation
• 1985
  • 1985-05-21 AU AU44073/85A patent/AU4407385A/en not_active Abandoned
  • 1985-05-21 DE DE19853590222 patent/DE3590222T1/de not_active Ceased
  • 1985-05-21 WO PCT/DK1985/000048 patent/WO1985005429A1/en active Application Filing
  • 1985-05-21 EP EP19850902490 patent/EP0183741A1/de not_active Withdrawn

Non-Patent Citations (1)

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