• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method and mechanism for compensating for pressure fluctuations in a paper machine stock flow system for conducting stock from a supply pump to a slice opening including providing a flexible diaphragm as one wall of the stock conduit with the diaphragm dampening pressure variations and being supported on its opposite side by air in an air chamber divided into compartments with a support compartment immediately opposite the diaphragm and a supply compartment being the support compartment and the compartments divided a by an attenuator wall. Air is supplied continuously at a reference pressure to the supply compartment, and a relief valve is positioned in the support compartment with the port opened or closed by movement of the diaphragm so that air is bled from the support compartment as the diaphragm moves toward the stock conduit with a drop of pressure therein. In another form, the structure included a diaphragm wall between a distribution chamber of a headbox and an air chamber with a valve controlling the release of pressure from the air chamber and controlled by the position of the diaphragm.
    公开号:SU797598A3
    申请号:SU762416157
    申请日:1976-10-29
    公开日:1981-01-15
    发明作者:Дж. Джастас Эдгар
    申请人:Белойт Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    (54) DEVICE FOR EXTINGUISHING PULSE PULSE FLASH PULSE
    The invention relates to equipment installed in front of the press case of a paper machine and can be used in the pulp and paper industry. There are known devices for dampening pulsations in the flow of paper pulp containing a pipe in whose wall a hole is made, to which an air chamber connected to a source of compressed air is connected through an elastic diaphragm. When pulsating in a mass flow, the pulsation of the diaphragm is caused. which impairs the mass flow damping. The purpose of the invention is to increase the reliability of the device. This goal is achieved by the fact that the air chamber is divided by an additional diaphragm made of an air-permeable material, such as felt, into two cavities. Moreover, the additional diaphragm can be covered on both sides with perforated sheets with removable caps. In addition, the device may have a bypass valve installed in the additional diaphragm and designed to prevent damage to the diaphragms during a sharp increase in pressure in the pipeline .-. FIG. 1 shows the proposed device, a general view; in fig. 2 section A-A in FIG. 1J in FIG. 3 section bb in fig. 1 (increased); FIG. 4 is a section B-B of FIG. 2 (increased); in fig. 5 is a cross-section of the FIG. 1, in FIG. 6 is a section DD-D in FIG. 5 (increased). The device comprises a pipeline 1 for feeding paper pulp from a pump 2 to a pressure head 3. A hole is made in the wall of the pipeline 1, to which an air bladder 7, separated by an additional diaphragm 8, is attached through an elastic diaphragm 4 fixed by means of nodes 5 or 6. air-permeable material, such as felt, into two cavities 9 and 10. Additional diaphragm 4 can be covered on both sides with perforated sheets x1 tl 12, which are equipped with removable plugs 13. 7 has a fitting 14 for feeding compressed air heat relief valves 15 and 16 and relief valve 17 designed to relieve pressure in chamber 7 with a sharp increase in pressure in pipeline 1.
    When the device is in operation, the paper pulp flows from the pump 1 to the pressure box 3. The pressure pulsations arising in the paper pulp flow are transmitted to the diaphragm 4. The air pressure in the chamber 7 is approximately equal to the pressure of the mass in the pipe 1, for this purpose into the chamber 7 compressed air. Diaphragm oscillations 4 cause the occurrence of a pressure difference in cavities 9 and 10 of chamber 7. This pressure difference is suppressed by an additional felt diaphragm 8. With the help of plugs 13. it is possible to regulate the pressure differential in cavities 9 and 10. Not only is an aperture compensated 8, but also perforated sheets 11 and 12. With a sharp increase in pressure in the pipe 1, the diaphragm 4 touches the relief valve I, which prevents the discharge of excess air into the atmosphere. Thus, the additional diaphragm 8 makes it possible to more gently compensate for the pressure pulsations in the pipeline 1, which ultimately leads to an increase in the quality of the web cast on the paper machine.
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    权利要求:
    Claims (5)
    [1]
    1. A device for dampening pulsation flow of paper pulp, containing a pipeline in the wall of which there is an opening, to which an air chamber connected to a source of compressed air is connected through an elastic diaphragm, in order to increase the reliability of the device, the air chamber is separated by an additional a diaphragm made of breathable mat.heriala on two cavities.
    [2]
    2. The device according to claim 1, distinguishes it from the fact that the additional diaphragm is made of felt.
    [3]
    3. The device according to paragraphs. 1 and 2, which is characterized by the fact that the additional diaphragm is covered on both sides by perforated sheets.
    [4]
    4. The device according to any one of claims 3, 3, and 4 tons, and that it has removable plugs installed in the holes of the perforated sheets.
    [5]
    5. The device according to claims 1-4, characterized in that it has a bypass valve installed in a removable additional diaphragm.
    Sources of information taken into account during the examination
    1. US patent 3672398, cl. ir 16 L 55/04, 1972 (prototype).
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU797598A3|1981-01-15|Device for damping pulsation of paper mass flow
    US4030971A|1977-06-21|System compensating for pressure fluctuations in a paper machine headbox
    US4251013A|1981-02-17|Storage vessel
    GB2029238A|1980-03-19|Low pressure warning for respiratory apparatus
    US2306060A|1942-12-22|Pressure regulating and reducing apparatus
    US4308095A|1981-12-29|Extended low frequency range pulsation attenuator
    US2194749A|1940-03-26|Pressure regulator
    US2813535A|1957-11-19|Purged web edge detector
    ES8100515A1|1980-11-01|Broad-band pulsation attenuator
    US1636919A|1927-07-26|Pressure-regulating valve
    US2779591A|1957-01-29|Device for automatically maintaining side registry in traveling webs
    US5839364A|1998-11-24|Dampening system for a printing press
    US2898909A|1959-08-11|Device for supplying a diver with air
    US1692507A|1928-11-20|Pneumatic action for pipe organs
    US2281611A|1942-05-05|Diaphragm whistle
    US2686462A|1954-08-17|Synchronized stock control device
    US1906652A|1933-05-02|Automatic pressure reducing valve
    SU583768A3|1977-12-05|Paper machine flow box
    US1154957A|1915-09-28|Pneumatic musical instrument.
    SE458797B|1989-05-08|Valve device
    US1303250A|1919-05-13|A corpora
    SU735184A3|1980-05-15|Apparatus for damping oscillation of paper pulp pressure while feeding a paper-making machine
    SU1654404A1|1991-06-07|Device for damping pulsation of paper pulp flow
    US2535645A|1950-12-26|Organ pipe assembly
    US498362A|1893-05-30|Pneumatic organ-action
    同族专利:
    公开号 | 公开日
    DE2649458C3|1981-03-26|
    PL117899B1|1981-08-31|
    MX146729A|1982-08-04|
    DE2649458B2|1980-08-07|
    ES453229A2|1977-12-16|
    CA1053047A|1979-04-24|
    DE2649458A1|1977-05-05|
    GB1562296A|1980-03-12|
    IT1074034B|1985-04-17|
    JPS5270104A|1977-06-10|
    JPS5527199B2|1980-07-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3130751A|1962-05-16|1964-04-28|Time Inc|Apparatus for damping pulses in a fluid|US4262700A|1979-03-16|1981-04-21|Beloit Corporation|Broad-band pulsation attenuator|
    JPS6222433Y2|1982-01-21|1987-06-08|
    AT392989B|1988-05-17|1991-07-25|Voith Ag J M|FABRIC DRAIN FOR PAPER MACHINES|
    DE19505381C1|1995-02-17|1996-08-01|Voith Sulzer Papiermasch Gmbh|Method of damping flow pulses in fibrous suspensions in paper production|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/626,824|US4030971A|1974-12-13|1975-10-29|System compensating for pressure fluctuations in a paper machine headbox|
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