Anti-drop device for shaft pin of plunger valve of blast furnace

Abstract

An anti-disengaging device for a shaft pin of a plunger valve of a blast furnace comprises a side clamping mechanism, a front clamping mechanism and a limiting mechanism. The number of the limiting mechanisms is two, and the limiting mechanisms are symmetrically arranged on the two sides of the front clamping mechanism. The number of the side clamping mechanisms is two, and the side clamping mechanisms are arranged on the limiting mechanisms on the two sides correspondingly. The front clamping mechanism is in contact with the side clamping mechanism; a combination body of the side clamping mechanism and the front clamping mechanism surrounds the periphery of the plunger valve rod inserting hole, and the front clamping mechanism is pressed on the end portion of the shaft pin in a contact mode. According to the pin shaft fixing device, the pin shaft is effectively limited, and the purpose of quickly fixing and disassembling the pin shaft is achieved.

Description

Technical Field

[0001] The utility model relates to an anti-dropping device, in particular to a device capable of preventing a shaft pin on a blast furnace plunger valve from falling off, and belongs to the technical field of metallurgical equipment. Background Art

[0002] In the iron-making blast furnace equipment system of metallurgical enterprises, the furnace top plunger valve is an important equipment for controlling the blast furnace receiving hopper to transport materials to the blast furnace material tank. The plunger valve is driven by a hydraulic cylinder, and the plunger valve and the end of the hydraulic cylinder piston rod are connected by a pin shaft. The end of the pin shaft is provided with a nut for fastening and a split pin for preventing it from falling off. In actual production, the docking part of the plunger valve and the hydraulic cylinder piston rod is located inside the closed square box, and the anti-falling nut and the split pin are installed on the back, which results in the installation of the anti-falling nut and the split pin relying entirely on the hand feel of the staff, and the installation process and the disassembly process are time-consuming and labor-intensive. In addition, due to the harsh on-site environment, the nut will loosen and squeeze the split pin to break during long-term use, and the nut will fall off, causing the pin shaft to move out of the pin hole, thereby causing the connection between the hydraulic cylinder and the plunger valve to fail, and the plunger valve loses driving power, resulting in the serious problem that the receiving hopper cannot normally transport iron-making raw materials to the blast furnace material tank, and the blast furnace reduces the wind. The nut fixation cannot complete the task of fixing the pin shaft well; therefore, a kind of anti-falling device that can quickly fix or detach the pin shaft is needed under the premise of reliably fixing the pin shaft during operation. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provides a blast furnace plunger valve shaft pin anti-detachment device, which can not only quickly fix or detach the pin shaft, but also reliably fix the pin shaft.

[0004] The problem described in the utility model is solved by the following technical solutions:

[0005] A device for preventing the shaft pin of a blast furnace plunger valve from falling off comprises a side clamping mechanism, a front clamping mechanism and a limit mechanism; the limit mechanisms are two in number and are symmetrically arranged on both sides of the front clamping mechanism; the side clamping mechanisms are two in number and are respectively arranged on the limit mechanisms on both sides; the front clamping mechanism contacts the side clamping mechanism; the combination of the side clamping mechanism and the front clamping mechanism surrounds the periphery of the plunger valve stem insertion hole, and the front clamping mechanism contacts and presses on the end of the shaft pin.

[0006] The above-mentioned blast furnace plunger valve shaft pin anti-slip device, the front clamping mechanism includes a front pressure plate and a side clamping piece; the side clamping pieces are symmetrically arranged on both sides of the front pressure plate; the front pressure plate contacts and presses on the end of the pin shaft located on the outside; the side clamping piece includes a clamping plate and a hinge seat; the hinge seat is arranged on the side wall of the front pressure plate, and the clamping plate is hingedly arranged on the hinge seat; a torsion spring is arranged between the clamping plate and the hinge seat.

[0007] The above-mentioned blast furnace plunger valve shaft pin anti-slip device, the limiting mechanism includes a guide bar, a connecting bar and a positioning bolt; the number of the guide bars is two, and they are symmetrically arranged at the top and bottom ends of the front pressure plate side wall; the connecting bar is arranged between the two guide bar ends; the center of the connecting bar is provided with a threaded hole, and the positioning bolt passes through the center threaded hole of the connecting bar.

[0008] The above-mentioned blast furnace plunger valve shaft pin anti-slip device, the side clamping mechanism includes a side clamping plate, a back plate and a limit strip; the end of the side clamping plate is provided with a back plate, and the combination is L-shaped; the side clamping plate contacts the side wall of the plunger valve stem, and the back plate contacts the back end surface of the plunger valve stem; two strip holes are provided on the side clamping plate, and the two strip holes are respectively passed through by two guide strips; the side clamping plate is located between the connecting strip and the front pressure plate; the end of the positioning bolt on the connecting strip contacts the outer side wall of the side clamping plate; the limit strip is provided on the end surface of the side clamping plate close to the front pressure plate, and the center line of the limit strip is parallel to the length direction line of the strip hole of the side clamping plate; a row of teeth is provided on the end surface of the limit strip close to the front pressure plate along its length direction, and the end of the clamping plate is clamped on the teeth of the limit strip; the end of the clamping plate connected to the hinged seat is closer to the back plate than the end of the clamping plate contacting the limit strip.

[0009] The utility model blocks the end of the pin shaft by the front clamping mechanism, effectively preventing the pin shaft from escaping from the insertion hole; fixes and limits the side clamping mechanism and the front clamping mechanism by the limiting mechanism; the back plate in the side clamping mechanism contacts the back of the plunger valve stem, and when the front clamping mechanism is subjected to the force that the pin shaft wants to disengage, the existence of the back plate fixes the front clamping mechanism, ensuring that the pin shaft cannot disengage from the insertion hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the utility model from a frontal perspective;

[0011] Figure 2 It is a schematic diagram of the structure of the utility model from a rear-facing perspective.

[0012] The list of numbers in the figure is: 1. plunger valve stem, 2. hydraulic cylinder piston rod, 3. front pressure plate, 4. clamping plate, 5. guide strip, 6. connecting strip, 7. positioning bolt, 8. side clamp, 9. back plate, 10. limit strip. DETAILED DESCRIPTION

[0013] See also Figure 1 and Figure 2The utility model includes a side clamping mechanism, a front clamping mechanism and a limiting mechanism; the front clamping mechanism can block the path of the pin shaft leaving the insertion hole to prevent the pin shaft from escaping; the side clamping mechanism provides a limit for the front clamping mechanism so that the front clamping mechanism can reliably support the pin shaft; the limiting mechanism is used to fix the connection between the side clamping mechanism and the front clamping mechanism; the number of the limiting mechanisms is two, and they are symmetrically arranged on both sides of the front clamping mechanism; the number of the side clamping mechanisms is two, and they are respectively arranged on the limiting mechanisms on both sides; the front clamping mechanism is in contact with the side clamping mechanism; the end of the plunger valve stem 1 is U-shaped, the end of the hydraulic cylinder piston rod is flat, and the end of the hydraulic cylinder piston rod is inserted into the U-shaped groove at the end of the plunger valve stem 1, and is fixed by the pin shaft passing through the insertion hole of the end of the hydraulic cylinder piston rod and the insertion hole on the plunger valve stem 1 at the same time; the combination of the side clamping mechanism and the front clamping mechanism surrounds the periphery of the insertion hole of the plunger valve stem 1, and the front clamping mechanism touches and presses on the end of the shaft pin.

[0014] The front clamping mechanism includes a front pressure plate 3 and a side clamping piece; the side clamping pieces are symmetrically arranged on both sides of the front pressure plate 3; the side clamping pieces are used to fix the front pressure plate 3 and the side clamping mechanism; the front pressure plate 3 contacts and presses on the end of the pin shaft located on the outside; the side clamping piece includes a clamping plate 4 and a hinge seat; the hinge seat is arranged on the side wall of the front pressure plate 3, and the clamping plate 4 is hingedly arranged on the hinge seat; a torsion spring is arranged between the clamping plate 4 and the hinge seat; the torsion spring provides the clamping plate 4 with a force that contacts and presses on the limit strip 10, ensuring that the clamping plate 4 can be reliably connected to the teeth of the limit strip 10 for limiting.

[0015] The limiting mechanism includes a guide bar 5, a connecting bar 6 and a positioning bolt 7; the number of the guide bars 5 is two, and they are symmetrically arranged at the top and bottom ends of the side wall of the front pressure plate 3; the connecting bar 6 is arranged between the ends of the two guide bars 5; a threaded hole is arranged in the center of the connecting bar 6, and the positioning bolt 7 passes through the center threaded hole of the connecting bar 6.

[0016] The side clamping mechanism includes a side clamping plate 8, a back plate 9 and a limit strip 10; the end of the side clamping plate 8 is provided with a back plate 9, and the combination thereof is L-shaped; the side clamping plate 8 contacts and presses on the side wall of the plunger valve stem 1, and the back plate 9 contacts and presses on the back end surface of the plunger valve stem 1; when the pin shaft presses against the front pressure plate and wants to detach, the force exerted on the front pressure plate is supported by the back plate 9, ensuring that the front pressure plate can reliably block the pin shaft; two strip holes are provided on the side clamping plate 8, and the two strip holes are respectively penetrated by two guide strips 5; the side clamping plate 8 is located between the connecting strip 6 and the front pressure plate 3; the existence of the strip-shaped hole allows the front pressure plate to adjust the distance from the back plate, thereby adapting to the sizes of different types of plunger valve stems. Similarly, the distance between the two side clamping plates 8 can also be adjusted, and can also adapt to the sizes of different types of plunger valve stems; that is, by adjusting the spacing between the side clamping plates 8 and the spacing between the front pressure plate and the back plate, plunger valve stems of various widths and thicknesses can be adapted; ensuring that the device can reliably surround and fit on the outer wall of the plunger valve stem.

[0017] The end of the positioning bolt 7 on the connecting strip 6 contacts and presses on the outer side wall of the side clamping plate 8; tightening the positioning bolt 7 can fix the position between the two side clamping plates 8, ensuring that the side clamping plates 8 on both sides reliably clamp the plunger valve stem in the middle; the limit strip 10 is arranged on the end surface of the side clamping plate 8 close to the front pressure plate 3, and the center line of the limit strip 10 is parallel to the length direction line of the strip hole of the side clamping plate 8; a row of teeth is arranged on the end surface of the limit strip 10 close to the front pressure plate 3 along its length direction, and the end of the clamping plate 4 is clamped on the teeth of the limit strip 10; the clamping plate 4 on the front pressure plate 3 is pressed against the teeth of the limit strip 10, and when it is subjected to force and wants to move away from the back plate, the existence of the clamping plate 4 limits the movement of the front pressure plate 3; the end of the clamping plate 4 connected to the hinged seat is closer to the back plate 9 than the end of the clamping plate 4 contacting the limit strip 10.

[0018] Actual use process: when docking the plunger valve stem with the hydraulic cylinder, the side clamps 8 on both sides of the device are pulled away and then sleeved outside the hydraulic cylinder piston rod, and then the hydraulic cylinder piston rod is moved to dock with the plunger valve stem, and then the pin is inserted; then the device is slid to slide onto the plunger valve stem, and then the two back plates 9 are tightly pressed on the back end surface of the plunger valve stem, and the front pressure plate 3 is tightly pressed on the end of the pin; the side clamps 8 on both sides are pulled in, so that the combination of the side clamps, the front pressure plate and the back plate tightly surrounds the plunger valve stem and is tightly pressed outside the pin, and then the positioning bolts 7 are tightened, so that the side clamps 8 on both sides are tightly pressed on the side walls of the plunger valve stem;

[0019] When it is necessary to remove the pin shaft to separate the plunger valve stem from the hydraulic cylinder piston rod; loosen the positioning bolts on both sides, pull the side clamping plate 8 away from each other, then pull the front pressure plate 3 away from the pin shaft, then move the device upward to make it sleeved on the hydraulic cylinder piston rod, then remove the pin shaft, then separate the plunger valve stem from the hydraulic cylinder piston rod, and finally remove the device.

Claims

1. A blast furnace plunger valve shaft pin anti-drop device, characterized in that: It comprises a side clamping mechanism, a front clamping mechanism and a limiting mechanism; the limiting mechanisms are two in number and are symmetrically arranged on both sides of the front clamping mechanism; the side clamping mechanisms are two in number and are respectively arranged on the limiting mechanisms on both sides; the front clamping mechanism contacts the side clamping mechanism; the combination of the side clamping mechanism and the front clamping mechanism surrounds the periphery of the plunger valve stem (1) insertion hole, and the front clamping mechanism contacts the end of the shaft pin.

2. The blast furnace plunger valve shaft pin anti-drop device according to claim 1, characterized in that: The front clamping mechanism comprises a front pressure plate (3) and a side clamping member; the side clamping members are symmetrically arranged on both sides of the front pressure plate (3); the front pressure plate (3) contacts and presses on the end of the pin shaft located on the outside; the side clamping member comprises a clamping plate (4) and a hinge seat; the hinge seat is arranged on the side wall of the front pressure plate (3), and the clamping plate (4) is hingedly arranged on the hinge seat; a torsion spring is arranged between the clamping plate (4) and the hinge seat.

3. The blast furnace plunger valve shaft pin anti-drop device according to claim 2, characterized in that: The limiting mechanism comprises a guide bar (5), a connecting bar (6) and a positioning bolt (7); the number of the guide bars (5) is two, and they are symmetrically arranged at the top and bottom ends of the side wall of the front pressure plate (3); the connecting bar (6) is arranged between the ends of the two guide bars (5); a threaded hole is arranged at the center of the connecting bar (6), and the positioning bolt (7) passes through the center threaded hole of the connecting bar (6).

4. The blast furnace plunger valve shaft pin anti-drop device according to claim 3, characterized in that: The side clamping mechanism comprises a side clamping plate (8), a back plate (9) and a limit strip (10); the end of the side clamping plate (8) is provided with a back plate (9), and the combination thereof is L-shaped; the side clamping plate (8) contacts and presses on the side wall of the plunger valve stem (1), and the back plate (9) contacts and presses on the back end surface of the plunger valve stem (1); two strip-shaped holes are provided on the side clamping plate (8), and the two strip-shaped holes are respectively penetrated by two guide strips (5); the side clamping plate (8) is located between the connecting strip (6) and the front pressure plate (3); the positioning bolt (7) on the connecting strip (6) The end of the side clamp (8) contacts and presses against the outer wall of the side clamp (8); the limiting strip (10) is arranged on the end surface of the side clamp (8) close to the front pressure plate (3), and the center line of the limiting strip (10) is parallel to the length direction line of the strip hole of the side clamp (8); the end surface of the limiting strip (10) close to the front pressure plate (3) is provided with a row of teeth along its length direction, and the end of the clamp (4) is clamped on the teeth of the limiting strip (10); the end of the clamp (4) connected to the hinge seat is closer to the back plate (9) than the end of the clamp (4) contacting the limiting strip (10).

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