EP0116704B1 - Spray bar valve - Google Patents

Spray bar valve Download PDF

Info

Publication number
EP0116704B1
EP0116704B1 EP83112237A EP83112237A EP0116704B1 EP 0116704 B1 EP0116704 B1 EP 0116704B1 EP 83112237 A EP83112237 A EP 83112237A EP 83112237 A EP83112237 A EP 83112237A EP 0116704 B1 EP0116704 B1 EP 0116704B1
Authority
EP
European Patent Office
Prior art keywords
valve
cone
spray bar
spindle
valve spindle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83112237A
Other languages
German (de)
French (fr)
Other versions
EP0116704A1 (en
Inventor
Rainer Ketola
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynapac AB
Original Assignee
Dynapac AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dynapac AB filed Critical Dynapac AB
Publication of EP0116704A1 publication Critical patent/EP0116704A1/en
Application granted granted Critical
Publication of EP0116704B1 publication Critical patent/EP0116704B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
    • E01C19/17—Application by spraying or throwing
    • E01C19/176—Spraying or throwing elements, e.g. nozzles; Arrangement thereof or supporting structures therefor, e.g. spray-bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/306—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • B05B15/658—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits the spraying apparatus or its outlet axis being perpendicular to the flow conduit

Definitions

  • the present invention relates to a device for spreading bituminous binder and in particular to a valve device for achieving improved regulation of the amount of binder it is intended to spread, according to the prior art part of claim 1.
  • the equipment generally used is a vehicle-mounted tank equipped with a spray tube or spray bar arranged transversely to the direction of travel of the tank. Arranged along the spray bar are a number of openings or nozzles through which the binder is sprayed, these being equipped with valves which can be opened and closed.
  • the control system for opening and closing the spray bar valves is generally arranged so as to enable simultaneous operation of an arbitrary number of valves as well as individual operation of each separate valve, which is essential for attaining the desired spreading conditions. It is also important that movement of the valve during the opening and closing operations is not adversely affected by the design of the valve and its mounting in the spray bar.
  • valve systems so far known as shown for example in DE-A-2 323 852
  • radial forces on the valve spindle often arise with wear in the spindle seal and spindle guide as a result.
  • the valve system according to the present invention (as defined in claim 1), purely axial movement of the valve spindle is obtained which results in longer cylinder and valve seat life and consequently more effective opening and closing of the valve.
  • Fig. 1 shows a longitudinal cross-section of a valve and its mounting in a spray bar.
  • Fig. 2 shows a cross-section through the valve along the line A-A in Fig. 1.
  • a spray bar 1 in which a valve 2 is mounted.
  • the valve is controlled by means of a pressure medium and is constructed like a conventional compressed air cylinder with attendant piston and piston rod.
  • the cylinder portion 3 is threaded into the spray bar 1 and the piston rod, which in the present case is called valve spindle 4, is extended and protrudes out of cylinder 3 into spray bar 1.
  • Valve spindle 4 is fitted at the end inside the cylinder portion 3 with a piston 5 and the other end with a valve cone 6 and extends diametrically from the cylinder portion 3 to the opposite wall of spray bar 1, into which a valve seat 7 corresponding to valve cone 6 is screwed.
  • Valve 2 opens and closes as valve cone 6 is moved into and out of contact with valve seat 7.
  • Valve piston 5 is capable of movement inside cylinder space 8, which communicates with an opening 9 in the cylinder wall through which pressure medium can be admitted to cylinder space 8, thus causing the piston 5 and with it valve cone 6 of valve spindle 4 to move away from contact with valve seat 7.
  • the valve is returned to contact with valve seat 7 by means of a spring 10, which is so pretensioned that it keeps the valve closed in the event of a loss of pressure medium.
  • spring 10 is to pretension the seal 11 which is designed to prevent binder from seeping out of spray bar 1 into cylinder 2 during the movement of the valve.
  • the seal 11 consists of V-rings which owing to the wedging effect are pressed against valve spindle 4 and cylinder housing 3.
  • the spring 10 is in this connection so dimensioned that it keeps the seal pretensioned even after a certain amount of wear has arisen in seal 11.
  • the cylinder space 8 is limited at the top by a sleeve-shaped cover 12 screwed onto the cylinder.
  • the outer wall of the cylinder housing is hexagonal in order to provide a better grip for an adjustable spanner, for example, when the housing is screwed into position in the wall of the spray bar.
  • the cover 12 is cylindrical, however, and so sized that gaps 13 are formed between the cylinder housing and the cover 12. These gaps serve as bleed channels for the air present above piston 5 when pressure medium is injected through opening 9 to press piston 5 upwards and consequently open the valve so that binder can flow out of spray bar 1 through the valve opening 14.
  • a sealing ring 15 which seals against valve spindle 4 and cylinder housing 3. If leakage of pressure medium or binder occurs as a result of wear in seal 15 or seal 11, for example, it will be diverted through a drain channel 16 arranged in the wall of the cylinder housing.
  • valve cone 6 is bowl-shaped and fitted over the lower end of valve spindle 4 with a certain degree of radial clearance.
  • a pin 17 which passes through a hole 18 in the lower end of spindle 4 and extends on either side of the spindle through holes in the cone wall, cone 6 is retained in place on valve spindle 4.
  • the diameter of hole 18 is larger than the diameter of pin 17, which enables cone 6 to move axially in relation to valve spindle 4.
  • a sealing ring 19 is fitted in valve seat 7.
  • This ring is of soft material and one of its properties is that the binder in spray bar 1 does not adhere to it. Since ring 19 is of soft material, sealing between it and valve cone 6, is assured even if a solid particle should find its way between the cone and the valve seat ring during the valve closing operation. The solid particle will in such event be pressed into the ring without any gap arising. Next time the valve is opened the solid particle will be flushed out with the binder through opening 14.
  • the hole in spray bar 1 into which the cylinder portion 3 is screwed can be suitably reinforced with an internally threaded bush 20.
  • the cylinder portion 3 is screwed into bush 20 until a stop nut or stop ring 21 on the cylinder housing abuts against a flange 22 arranged on bush 20.
  • a sealing ring 23 is arranged between the cylinder housing and the bush.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Lift Valve (AREA)
  • Nozzles (AREA)

Description

  • The present invention relates to a device for spreading bituminous binder and in particular to a valve device for achieving improved regulation of the amount of binder it is intended to spread, according to the prior art part of claim 1.
  • When spreading bituminous binder in liquid form on roads the equipment generally used is a vehicle-mounted tank equipped with a spray tube or spray bar arranged transversely to the direction of travel of the tank. Arranged along the spray bar are a number of openings or nozzles through which the binder is sprayed, these being equipped with valves which can be opened and closed.
  • The control system for opening and closing the spray bar valves is generally arranged so as to enable simultaneous operation of an arbitrary number of valves as well as individual operation of each separate valve, which is essential for attaining the desired spreading conditions. It is also important that movement of the valve during the opening and closing operations is not adversely affected by the design of the valve and its mounting in the spray bar.
  • In valve systems so far known (as shown for example in DE-A-2 323 852), radial forces on the valve spindle often arise with wear in the spindle seal and spindle guide as a result. In the valve system according to the present invention (as defined in claim 1), purely axial movement of the valve spindle is obtained which results in longer cylinder and valve seat life and consequently more effective opening and closing of the valve.
  • The invention will be described in greater detail with reference to the enclosed drawing, where Fig. 1 shows a longitudinal cross-section of a valve and its mounting in a spray bar. Fig. 2 shows a cross-section through the valve along the line A-A in Fig. 1.
  • Shown in Fig. 1 is a spray bar 1 in which a valve 2 is mounted. The valve is controlled by means of a pressure medium and is constructed like a conventional compressed air cylinder with attendant piston and piston rod. The cylinder portion 3 is threaded into the spray bar 1 and the piston rod, which in the present case is called valve spindle 4, is extended and protrudes out of cylinder 3 into spray bar 1.
  • Valve spindle 4 is fitted at the end inside the cylinder portion 3 with a piston 5 and the other end with a valve cone 6 and extends diametrically from the cylinder portion 3 to the opposite wall of spray bar 1, into which a valve seat 7 corresponding to valve cone 6 is screwed. Valve 2 opens and closes as valve cone 6 is moved into and out of contact with valve seat 7.
  • Valve piston 5 is capable of movement inside cylinder space 8, which communicates with an opening 9 in the cylinder wall through which pressure medium can be admitted to cylinder space 8, thus causing the piston 5 and with it valve cone 6 of valve spindle 4 to move away from contact with valve seat 7. The valve is returned to contact with valve seat 7 by means of a spring 10, which is so pretensioned that it keeps the valve closed in the event of a loss of pressure medium. Another purpose of spring 10 is to pretension the seal 11 which is designed to prevent binder from seeping out of spray bar 1 into cylinder 2 during the movement of the valve. The seal 11 consists of V-rings which owing to the wedging effect are pressed against valve spindle 4 and cylinder housing 3.
  • The spring 10 is in this connection so dimensioned that it keeps the seal pretensioned even after a certain amount of wear has arisen in seal 11.
  • The cylinder space 8 is limited at the top by a sleeve-shaped cover 12 screwed onto the cylinder. The outer wall of the cylinder housing is hexagonal in order to provide a better grip for an adjustable spanner, for example, when the housing is screwed into position in the wall of the spray bar. The cover 12 is cylindrical, however, and so sized that gaps 13 are formed between the cylinder housing and the cover 12. These gaps serve as bleed channels for the air present above piston 5 when pressure medium is injected through opening 9 to press piston 5 upwards and consequently open the valve so that binder can flow out of spray bar 1 through the valve opening 14. To prevent pressure medium from entering spray bar 1 the cylinder space 8 is sealed at the bottom by means of a sealing ring 15 which seals against valve spindle 4 and cylinder housing 3. If leakage of pressure medium or binder occurs as a result of wear in seal 15 or seal 11, for example, it will be diverted through a drain channel 16 arranged in the wall of the cylinder housing.
  • Since cylinder housing 3 and valve seat 7 are mounted so far away from each other, a high degree of mounting precision is necessary to ensure that an effective valve seal will be obtained. To eliminate this problem valve cone 6 is bowl-shaped and fitted over the lower end of valve spindle 4 with a certain degree of radial clearance. By means of a pin 17 which passes through a hole 18 in the lower end of spindle 4 and extends on either side of the spindle through holes in the cone wall, cone 6 is retained in place on valve spindle 4. The diameter of hole 18 is larger than the diameter of pin 17, which enables cone 6 to move axially in relation to valve spindle 4.
  • The mounting of cone 6 accordingly permits both axial and radial movement relative to valve spindle 4, as a result of which the requirement of precision in connection with fitting the cylinder housing and valve seat can be substantially reduced without necessitating any sacrifice of the sealing requirement.
  • In order to satisfy the sealing requirement still further, a sealing ring 19 is fitted in valve seat 7. This ring is of soft material and one of its properties is that the binder in spray bar 1 does not adhere to it. Since ring 19 is of soft material, sealing between it and valve cone 6, is assured even if a solid particle should find its way between the cone and the valve seat ring during the valve closing operation. The solid particle will in such event be pressed into the ring without any gap arising. Next time the valve is opened the solid particle will be flushed out with the binder through opening 14.
  • The hole in spray bar 1 into which the cylinder portion 3 is screwed can be suitably reinforced with an internally threaded bush 20. The cylinder portion 3 is screwed into bush 20 until a stop nut or stop ring 21 on the cylinder housing abuts against a flange 22 arranged on bush 20. To prevent binder from seeping out between the threads of the bush, a sealing ring 23 is arranged between the cylinder housing and the bush.

Claims (3)

1. A device for spreading bituminous binder comprising a spray bar (1) and a number of pressure medium controlled valves (2) arranged along it for opening and closing the spray bar nozzles, the said valves (2) each consisting of a pressure cylinder (3) mounted in the spray bar, a piston (5) which is actuated by the pressure medium and capable of axial movement inside the cylinder and a valve spindle (4) connected to the piston and extending into the spray bar for internal sealing of a valve seat mounted in the wall of the spray bar and oriented diametrically in relation to the pressure cylinder the end of the valve spindle (4) facing the valve seat (7) being equipped with a valve cone (6), characterized in that said valve cone (6) is capable of axial and radial movement in relation to the valve spindle (4) and in that a sealing ring (19) of resilient material is arranged on the valve seat (7).
2. A device as in Claim 1, characterized in that the valve spindle (4) is fitted with a pretensioned spring (10) for the purpose of keeping the valve cone (6) pressed against the valve seat (7) and pretensioning the seal (11) in the event of a loss of pressure medium.
3. A device as in Claim 1, characterized in that the valve cone (6) is bowl-shaped and by means of a pin (17) mounted in it the cone is pivoted at the lower end of the valve spindle (4), whereby the cone (6) is so sized that it surrounds the lower end of the valve spindle (4) with a radial clearance and in that the pin (17) extends diametrically from one side of the cone (6) to the other side and through the lower end of the valve spindle (4), whereby the hole in the valve spindle (4) is larger than the diameter of the pin (17) and so enables the cone (6) to move axially in relation to the valve spindle (4).
EP83112237A 1983-02-10 1983-12-06 Spray bar valve Expired EP0116704B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8300723 1983-02-10
SE8300723A SE444331B (en) 1983-02-10 1983-02-10 RAMP VALVE

Publications (2)

Publication Number Publication Date
EP0116704A1 EP0116704A1 (en) 1984-08-29
EP0116704B1 true EP0116704B1 (en) 1987-03-04

Family

ID=20349984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112237A Expired EP0116704B1 (en) 1983-02-10 1983-12-06 Spray bar valve

Country Status (6)

Country Link
EP (1) EP0116704B1 (en)
JP (1) JPS59154157A (en)
AU (1) AU568329B2 (en)
BR (1) BR8400069A (en)
DE (1) DE3370039D1 (en)
SE (1) SE444331B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104948816A (en) * 2015-06-29 2015-09-30 洛阳栾川钼业集团股份有限公司 Electromagnetic pneumatic valve

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62140962U (en) * 1986-02-26 1987-09-05
JPS6332661U (en) * 1986-08-18 1988-03-02
NL8702618A (en) * 1987-11-03 1989-06-01 Burggraaff Teunis TAR SPRAYER WITH VALVE.
AU628360B2 (en) * 1988-07-25 1992-09-17 Commissioner Of Main Roads In The State Of Western Australia Spraying apparatus
US4960242A (en) * 1988-07-28 1990-10-02 Rosco Manufacturing Company Asphalt distributor
FR2703702A1 (en) * 1993-04-07 1994-10-14 Shell Int Research Road coating valve, spray bar fitted with such a valve and vehicle.
IES58774B2 (en) * 1993-05-11 1993-11-03 Duffy Tony Eng Ltd A spray bar assembly
JPH072507U (en) * 1993-06-18 1995-01-13 範多機械株式会社 Asphalt solution spraying device
US6776360B2 (en) 2001-06-26 2004-08-17 Spraying Systems Co. Spray gun with improved needle shut-off valve sealing arrangement
US8939387B2 (en) 2010-05-03 2015-01-27 Chapin Manufacturing, Inc. Spray gun
CN108149549B (en) * 2018-01-24 2023-12-08 江苏徐工工程机械研究院有限公司 Asphalt foaming spraying device and asphalt cold recycling equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1018718A (en) * 1950-05-23 1953-01-12 Houseman & Thompson Ltd Boiler purge valve
US3055345A (en) * 1961-02-02 1962-09-25 Shafer Valve Co Hydraulic latch system for fluid motor operator
DE2323852A1 (en) * 1973-05-11 1974-11-28 Hermann Beck DEVICE FOR OPENING AND CLOSING SPRING-LOADED CLOSED VALVES OF EQUIPMENT FOR SPRAYING ROADS
FR2455125A1 (en) * 1979-04-27 1980-11-21 Kozuti Gepellato Vallalat Road bitumen spraying vehicle - has pressure meter in pipe, switches and spray pump linked signal transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104948816A (en) * 2015-06-29 2015-09-30 洛阳栾川钼业集团股份有限公司 Electromagnetic pneumatic valve

Also Published As

Publication number Publication date
SE8300723D0 (en) 1983-02-10
SE444331B (en) 1986-04-07
DE3370039D1 (en) 1987-04-09
BR8400069A (en) 1985-02-12
AU568329B2 (en) 1987-12-24
AU2443284A (en) 1984-08-16
EP0116704A1 (en) 1984-08-29
JPS59154157A (en) 1984-09-03
SE8300723L (en) 1984-08-11

Similar Documents

Publication Publication Date Title
EP0116704B1 (en) Spray bar valve
US4632228A (en) Cylinder piston device
EP0598977B1 (en) Valve snubber
DE69227132T2 (en) VALVE ARRANGEMENT
DE4409252A1 (en) Pneumatic spring arrangement
EP0484648A1 (en) Limit stop with damping device
CA1286193C (en) Pressure limiting valve
DE68917042T2 (en) High temperature safety valve.
CA1163524B (en) Automatic bleeder valve
DE2352826C2 (en)
US5309817A (en) Linear brake for fluid actuator
US5116028A (en) Pressure tube-piston device
EP0666809B1 (en) Hydraulic pressure relief valve
EP0540852B1 (en) Relay valve
DE1131535B (en) Control valve for dual-line hydraulic brake systems in vehicle trailers
EP0223935A1 (en) Double circuit controlled brake pressure control valve
DE2107886A1 (en) Control valve
DE69405647T2 (en) Internal shut-off valve
DE69011442T2 (en) Housing for reversible spindle valve.
US5190262A (en) Hydraulically-operated valve assembly
DE2726494C3 (en) Pressure regulator for compressed air supply systems
US4458716A (en) Device for piloting a safety valve
DE3005280A1 (en) control valve for safety shower - has push button operation with retarded closing of water flow
DE7924834U1 (en) Hydraulic damping device
EP0097223A1 (en) Device for damping air blasted from valve installations

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19840921

ITF It: translation for a ep patent filed
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DYNAPAC AKTIEBOLAG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3370039

Country of ref document: DE

Date of ref document: 19870409

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881206

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19890831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19890901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST