EP0047538B1 - Manual operating device for ladle type sliding gate - Google Patents

Manual operating device for ladle type sliding gate Download PDF

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Publication number
EP0047538B1
EP0047538B1 EP81200829A EP81200829A EP0047538B1 EP 0047538 B1 EP0047538 B1 EP 0047538B1 EP 81200829 A EP81200829 A EP 81200829A EP 81200829 A EP81200829 A EP 81200829A EP 0047538 B1 EP0047538 B1 EP 0047538B1
Authority
EP
European Patent Office
Prior art keywords
sliding gate
manual operating
operating device
rod
type sliding
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
EP81200829A
Other languages
German (de)
French (fr)
Other versions
EP0047538A1 (en
Inventor
Roberto Pescatori
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.)
Sirma SpA
Original Assignee
Sirma SpA
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Filing date
Publication date
Application filed by Sirma SpA filed Critical Sirma SpA
Priority to AT81200829T priority Critical patent/ATE10914T1/en
Publication of EP0047538A1 publication Critical patent/EP0047538A1/en
Application granted granted Critical
Publication of EP0047538B1 publication Critical patent/EP0047538B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/38—Means for operating the sliding gate

Definitions

  • This invention relates to a manual operating device for ladle type sliding gate.
  • ladle type sliding gates which comprise a fixed plate, applied to the pouring container of the ladle and a parallelly movable plate with respect to the fixed plate.
  • Each of the plates are provided with a hole and in a certain reciprocal position the two holes are coaxial and allow the pouring to be carried out.
  • a well-known operating device comprises a system of levers which are run by the workman and which have effect on the movable plate.
  • a drawback of this device consists in that, notwithstanding the system of levers, running of the movable plate requires stresses which can result once again excessive owing to the low efficiency level of transmission that the system itself allows.
  • Another well-known manual operating device of the movable plate comprises a screw and screw bolt type mechanism, worked by a system of levers through a pinion and rack coupling (cf. IT-A-983 505).
  • a drawback of this device consists in that, in order to carry out a very reduced transfer of the movable plate, it requires very great stresses that also bring about a very slow closing motion.
  • Another well-known manual operating device of the movable plate comprises a screw and screw bolt type mechanism, which is worked by a handwheel.
  • This device presents the drawback of being difficult to operate from a distance and therefore needs the presence of the operating handwheel near the ladle, with considerable risks to the workman on the casting operation place. Also the realizable movements of this device are slow and difficult because of the low efficiency of connection of the system.
  • This device presents the drawbacks that it requires very great stresses to displace the movable plate. Moreover it forces the workman to place himself in a prefixed position, which cannot be at all favourable and secure.
  • An object of the invention is to realize a manual operating device for ladle type sliding gate which combines a high-sealing security with a considerable easiness and rapidity of movement for the workman.
  • Another object of the invention is to realize a device that can be angularly oriented and which allows the workman to place himself in a most favourable and secure position.
  • Another object of the invention is to realize a device which allows quick running reverse of the movable plate of the discharger for optimal regulation of the pouring flow.
  • Another object of the invention is to realize a device which allows a quick removal of the moving rod in the case of an emergency.
  • a manual operating device for ladle type sliding gate provided with a rod-driven reduction gear, through which the sliding gate is moved, characterized in that it comprises, for advancing the sliding gate, a reversible ratched gear, which operates the movable plate of a closing device through the reduction gear with a small driving wheel and a larger driven wheel, and a lever system, operated by the larger diameter toothed wheel, in the centre of the toothed wheel a fork element being pivotally mounted, supporting the toothed wheel at one of its ends and connected to the lever system at its other end.
  • the ratchet gear can be housed on a head of the operating rod, which can be connected to and disconnected from the driving wheel.
  • the device according to the invention comprises a mechanism 1, protected by a casing 2 (partially represented in figure 1) and formed by the connecting of a toothed wheel 3 to a toothed sector 4, substantially semi-circular and of a greater diameter.
  • the said toothed sector 4 is integral to the projection 5 of a joint support 6 to a vertical pin 7 integral to the lateral edge of the ladle 8.
  • a fork element 9 which supports at one end the toothed wheel 3 of the mechanism 1 and which bears an articulated rod 10 at the other end.
  • the rod 10 is connected, by a hinged joint 11 to a further operating rod 12 of a lever system 13, which causes horizontal running of the sliding gate 14 of closing the hole of the ladle pouring seat 8.
  • the toothed wheel 3 has a square hole 15 for the insertion of a corresponding square key 16 provided on the advancing ratched gear 17 housed on a head end 18 of an operating rod 19.
  • the said ratched gear 17 is of reversible type and its inversion is actuated by a small lever 20 which is mounted on the head 18 of the rod 19 and engaged with the prongs of a fork 21 fixed to the stem 22 of the rod 19, which can axially rotate with respect to the head 18.
  • the device according to the invention operates as follows: when the melted metal is ready to be discharged from the ladle 8 in the underlying ingot mold, the workman inserts the square key 16 of the ratched gear 17 in the corresponding hole 15 of the toothed wheel 3 and turns the support 6 with respect to the vertical pin 7 in the angular position which he finds most favourable and secure.
  • reciprocating the rod 19 he operates the ratched gear 17.
  • This reciprocation of the rod 19 in one direction causes the toothed wheel 3 to rotate, but in the opposite direction carries out an idle return stroke.
  • the turning of the toothed wheel 3 on the fixed toothed sector 4 causes rotation of the fork element 9, which moves the rods 10 and 12 and the lever system 13, which causes the horizontal running of the sliding gate 14 and therefore allowing the melted metal flow in the ingot mold.
  • the workman rotates the stem 22 of the rod 19 with respect to the head 18, around its axis.
  • the fork 21 which is fixed to the rod, moves the small lever 20 which inverts the active drive of the ratched gear 17, so moving in the opposite direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Transmission Devices (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Threshing Machine Elements (AREA)

Abstract

A manual operating device for ladle type sliding gate comprises a reversible advancing ratchet gear (17) which is moved by a rod (19) and which operates the movable plate of a closing device by means of a mechanism (1), with a toothed sector (4), and a lever system (12, 13).

Description

  • This invention relates to a manual operating device for ladle type sliding gate.
  • Well-known are ladle type sliding gates which comprise a fixed plate, applied to the pouring container of the ladle and a parallelly movable plate with respect to the fixed plate. Each of the plates are provided with a hole and in a certain reciprocal position the two holes are coaxial and allow the pouring to be carried out.
  • In order to ensure the sealing of the discharger when the two holes are not corresponding it's necessary that the movable plate is kept forcedly adherent to the fixed plate, and this implies too higher stresses for the workman to carry out manual movement.
  • In order to overcome this problem, manual operating devices based essentially on the principle of reducing in one way or another the strain which the workman has to carry out in order to cause shifting of the movable plate, have been proposed.
  • A well-known operating device comprises a system of levers which are run by the workman and which have effect on the movable plate. A drawback of this device consists in that, notwithstanding the system of levers, running of the movable plate requires stresses which can result once again excessive owing to the low efficiency level of transmission that the system itself allows.
  • Another well-known manual operating device of the movable plate comprises a screw and screw bolt type mechanism, worked by a system of levers through a pinion and rack coupling (cf. IT-A-983 505).
  • A drawback of this device consists in that, in order to carry out a very reduced transfer of the movable plate, it requires very great stresses that also bring about a very slow closing motion.
  • Another well-known manual operating device of the movable plate comprises a screw and screw bolt type mechanism, which is worked by a handwheel. This device presents the drawback of being difficult to operate from a distance and therefore needs the presence of the operating handwheel near the ladle, with considerable risks to the workman on the casting operation place. Also the realizable movements of this device are slow and difficult because of the low efficiency of connection of the system.
  • Another well-known manual operating device is described in FR-A-2.380.834. In this device the movable plate is operated by a lever system connected to a rack with which a rod-driven toothed circular portion engages.
  • This device presents the drawbacks that it requires very great stresses to displace the movable plate. Moreover it forces the workman to place himself in a prefixed position, which cannot be at all favourable and secure.
  • Furthermore in case of an emergency this device doesn't allow the quick removal of the moving rod.
  • An object of the invention is to realize a manual operating device for ladle type sliding gate which combines a high-sealing security with a considerable easiness and rapidity of movement for the workman.
  • Another object of the invention is to realize a device that can be angularly oriented and which allows the workman to place himself in a most favourable and secure position.
  • Another object of the invention is to realize a device which allows quick running reverse of the movable plate of the discharger for optimal regulation of the pouring flow.
  • Lastly, another object of the invention is to realize a device which allows a quick removal of the moving rod in the case of an emergency.
  • These objects are attained according to the invention with a manual operating device for ladle type sliding gate provided with a rod-driven reduction gear, through which the sliding gate is moved, characterized in that it comprises, for advancing the sliding gate, a reversible ratched gear, which operates the movable plate of a closing device through the reduction gear with a small driving wheel and a larger driven wheel, and a lever system, operated by the larger diameter toothed wheel, in the centre of the toothed wheel a fork element being pivotally mounted, supporting the toothed wheel at one of its ends and connected to the lever system at its other end.
  • Advantageously the ratchet gear can be housed on a head of the operating rod, which can be connected to and disconnected from the driving wheel.
  • This invention is hereinafter further described, merely by way of example, with reference to the enclosed drawings in which:
    • Figure 1 shows the operating device according to the invention, applied to a ladle type sliding gate in a lateral schematic view,
    • Figure 2 shows, in the same view as figure 1, the enlarged mechanism applied to the ladle and moved by the reversible advancing ratched gear, and
    • Figure 3 shows, in a partially cross-sectioned lateral view, the head of the advancing rod of the ratched gear.
  • As can be seen in the drawings, the device according to the invention comprises a mechanism 1, protected by a casing 2 (partially represented in figure 1) and formed by the connecting of a toothed wheel 3 to a toothed sector 4, substantially semi-circular and of a greater diameter. The said toothed sector 4 is integral to the projection 5 of a joint support 6 to a vertical pin 7 integral to the lateral edge of the ladle 8.
  • In the centre of the toothed sector 4 it is articulated a fork element 9, which supports at one end the toothed wheel 3 of the mechanism 1 and which bears an articulated rod 10 at the other end.
  • The rod 10 is connected, by a hinged joint 11 to a further operating rod 12 of a lever system 13, which causes horizontal running of the sliding gate 14 of closing the hole of the ladle pouring seat 8.
  • The toothed wheel 3 has a square hole 15 for the insertion of a corresponding square key 16 provided on the advancing ratched gear 17 housed on a head end 18 of an operating rod 19. The said ratched gear 17 is of reversible type and its inversion is actuated by a small lever 20 which is mounted on the head 18 of the rod 19 and engaged with the prongs of a fork 21 fixed to the stem 22 of the rod 19, which can axially rotate with respect to the head 18.
  • The device according to the invention operates as follows: when the melted metal is ready to be discharged from the ladle 8 in the underlying ingot mold, the workman inserts the square key 16 of the ratched gear 17 in the corresponding hole 15 of the toothed wheel 3 and turns the support 6 with respect to the vertical pin 7 in the angular position which he finds most favourable and secure. Thus, reciprocating the rod 19, he operates the ratched gear 17. This reciprocation of the rod 19 in one direction causes the toothed wheel 3 to rotate, but in the opposite direction carries out an idle return stroke. The turning of the toothed wheel 3 on the fixed toothed sector 4 causes rotation of the fork element 9, which moves the rods 10 and 12 and the lever system 13, which causes the horizontal running of the sliding gate 14 and therefore allowing the melted metal flow in the ingot mold.
  • In order to move the sliding gate 14 in the opposite direction (to stop or regulate the pouring flow), the workman rotates the stem 22 of the rod 19 with respect to the head 18, around its axis. In such a way the fork 21, which is fixed to the rod, moves the small lever 20 which inverts the active drive of the ratched gear 17, so moving in the opposite direction.
  • From the above, it clearly results that the manual operating device according to the invention, offers a number of advantages, which are listed here below:
    • - an easy, quick and secure working by the workman, who can choose the most favourable position;
    • - the possibility for the workman to quickly invert the direction of the discharger without abandoning the advancing rod 19;
    • - quick removal of the advancing rod 19 in a case of emergency.

Claims (4)

1. Manual operating device for ladle type sliding gate provided with a rod-driven reduction gear (17), through which the sliding gate (14) is moved, characterized in that it comprises, for advancing the sliding gate (14), a reversible ratchet gear (17), which operates the movable plate of a closing device through the reduction gear (17) with a small driving wheel (3) and a larger driven wheel (4), and a lever system (12, 13), operated by the larger diameter toothed wheel (4), in the centre of the toothed wheel (4) a fork element (9) being pivotally mounted, supporting the toothed wheel (3) at one of its ends and connected to the lever system (13) at its other end.
2. Manual operating device according to claim 1 characterized in that the ratchet gear (17) is housed on a head (18) of the operating rod (19), which can be connected to and disconnected from the driving wheel (3).
3. Manual operating device according to claim 1 characterized in that the ratchet gear (17) is provided with a device for inversing the movement of the sliding gate (14) and that the said device is operated by an axial rotation of the operating rod (19) with respect to its head (18).
4. Manual operating device according to claims 1 and 3 characterized in that the device for inversing the movement of the sliding gate (14) is operated by a small lever (20) which is moved by a fork (21) integral to the stem (22) of the operating rod (19).
EP81200829A 1980-09-05 1981-07-20 Manual operating device for ladle type sliding gate Expired EP0047538B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81200829T ATE10914T1 (en) 1980-09-05 1981-07-20 HAND-OPERATED PAN SLIDE LOCK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT84141/80A IT1141818B (en) 1980-09-05 1980-09-05 MANUAL CONTROL DEVICE FOR LADDLE DRAWER
IT8414180 1980-09-05

Publications (2)

Publication Number Publication Date
EP0047538A1 EP0047538A1 (en) 1982-03-17
EP0047538B1 true EP0047538B1 (en) 1984-12-27

Family

ID=11324668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200829A Expired EP0047538B1 (en) 1980-09-05 1981-07-20 Manual operating device for ladle type sliding gate

Country Status (4)

Country Link
EP (1) EP0047538B1 (en)
AT (1) ATE10914T1 (en)
DE (1) DE3167935D1 (en)
IT (1) IT1141818B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3334438C1 (en) * 1983-09-23 1984-07-12 Zimmermann & Jansen GmbH, 5160 Düren Manual actuation mechanism for a ladle slide closure
DE9307781U1 (en) * 1992-07-17 1993-08-12 Stopinc Ag, Baar Drive device for a sliding closure on a container containing molten metal
CN112091205A (en) * 2020-08-27 2020-12-18 中冶陕压重工设备有限公司 Sliding gate linkage device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441340A (en) * 1920-05-22 1923-01-09 Max W Goldberg Crucible holder
US2138331A (en) * 1936-09-04 1938-11-29 Billings & Spencer Company Ratchet wrench
FR2259670A1 (en) * 1974-02-05 1975-08-29 Gregoire Marcel Ratchet type ring spanner for radiator connections - has handle forked to translate w.r.t. key and crenellated wheel
GB1590775A (en) * 1977-02-17 1981-06-10 Flogates Ltd Sliding gate valves
GB1595815A (en) * 1978-03-21 1981-08-19 Vesuvius Int Corp Flow control device for molten metal

Also Published As

Publication number Publication date
EP0047538A1 (en) 1982-03-17
ATE10914T1 (en) 1985-01-15
DE3167935D1 (en) 1985-02-07
IT1141818B (en) 1986-10-08
IT8084141A0 (en) 1980-09-05

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