JPH0556430B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to pressure vessels used for sterilization, etc., whose door cover plates are opened and closed relatively frequently. This invention relates to a plate circumference lever type automatic tightening device.

More specifically, the present invention relates to an automatic tightening device having a structure that can accommodate various opening shapes, such as a quadrilateral shape instead of a normal circle.

(Prior art) Conventional door lid tightening devices for pressure vessels, etc. include radiation rod type, eye bolt type, clutch lever type,
Furthermore, recently there are devices that apply pressure to the gasket to seal the door cover plate, but each device has its advantages and disadvantages.

Radiation rod type and eye bolt type devices are mechanically the most reliable and stable mechanisms, but mechanically they cannot be tightened automatically, so the only option is to tighten them using a manual handle or the like.

In addition, in the clutch type, although the container shape can be adopted with a circular cross section, it has a rectangular frontage (opening).
cannot be adopted.

Furthermore, in the method of sealing by applying pressure to the packing part, although it is possible to automatically tighten and seal the door cover plate, the types of pressure medium are limited. Relatively low pressure and consideration must be given to high heat, and when the door cover plate is opened and closed, the packing part may curl up, significantly shortening the life of the packing, and the pressure inside the container may leak from the door cover plate and the pressure required for the packing seal. The drawback was that there was a lot of media leakage.

(Problems to be Solved by the Invention) The purpose of the present invention is to solve the drawbacks of the conventional door cover plate tightening device and to use a door cover plate peripheral lever type automatic tightening device that can be used for pressure vessels having a quadrilateral opening. The objective is to provide an embedded device.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a lever-type automatic tightening device for a door cover plate of a pressure vessel, etc. according to the present invention tightly tightly attaches a door cover plate to a flange portion of a container having a rectangular opening. In a door cover tightening device for a pressure vessel or the like that is to be tightened or released, the flange is provided at a plurality of locations surrounding the outer periphery of the door cover plate at the closed position of the door cover plate, and is arranged in a direction perpendicular to the input shaft. a plurality of screws having a rod, the rods being moved forward and backward by the rotation of the input shaft when the rotation of the rods is restricted; a peripheral lever fixed to the rod of each of the screws; and the door cover plate being in the closed position. a door cover plate side protrusion that limits the rotation of each of the circumferential levers in a first direction; and a second direction of the circumferential levers at a position where the circumferential levers are removed from the outer periphery of the door cover plate on the flange side. a flange-side protrusion that limits the rotation of the screws; and a drive means that transmits forward and reverse rotational force to the input shaft of each of the screw jacks, and when the door cover plate is in the closed position, the drive means applies a positive force to the input shaft. Rotation is applied so that the circumferential lever is restricted from rotating in the first direction by the protrusion on the door cover plate side, and then the rod is pulled in and tightly tightened by rotation, and the tightening of the circumferential lever is loosened by reverse rotation. After the second rotation, the rod is restricted by the flange-side protrusion, and then the rod is pulled out.

The opening of the container may be quadrilateral.

The screw jacks have an input shaft and an output shaft integral with the screw jacks, and the screw jacks are linearly arranged along the sides of the rectangular opening, and the screw jacks can be configured to be sequentially driven in series by the driving means.

The screws are arranged linearly along the side of the rectangular opening, and rotational force is transmitted from the drive shaft of the drive means similarly arranged along the side through a pair of gears. Can be configured.

(Example) Hereinafter, the present invention will be described in more detail with reference to the drawings and the like.

FIG. 1 is a view of a first embodiment of a circumferential lever type automatic tightening device for a door cover plate according to the present invention, viewed from the front (direction toward a closed door).

Fig. 2 is a partially cutaway view taken along the line A-A in Fig. 1, mainly showing a screwdriver, and Fig. 7 shows a cross section of the screwdriver, etc. corresponding to that state. A diagram is shown.

FIG. 3 is an enlarged view of the portion indicated by B in FIG. 1.

FIG. 4 is a sectional view taken along line HH in FIG. 3.

FIG. 5 is a view of the door cover circumference lever type automatic tightening device according to the present invention shown in FIG. 1, viewed from the direction shown in FIG. 2, and mainly shows the system layout of the transmission mechanism. There is.

As shown in FIG. 5, the pressure vessel has a substantially rectangular cross section due to the copper plate 2 of the pressure vessel forming its wall, and the door cover plate 1 has a rectangular square shape. A large number of circumferential levers 5 are arranged on the front flange 2-2 of the container corresponding to the entire outer periphery of the door cover plate 1, so that the internal pressure or external pressure of the pressure vessel applied to the door cover plate 1 can be tightened with an even load. It is something.

The circumferential lever 5 is designed so that the tip D section of the circumferential lever 5 can rotate 90 degrees in the direction of the arrow E, as typically shown in the section B in FIG.

This operation will be explained in detail later with reference to FIGS. 2, 3, and 4.

By displacing the circumferential lever 5, which was designed to be tightened to the entire outer peripheral edge of the door cover plate 1, by 90 degrees as shown in part B, the door cover plate end 1e is released from each circumferential lever 5. .

The door cover plate 1 is supported by hinge arms 4, 4, and by operating the handle 3 provided on the door cover plate 1, the door cover plate 1 can be moved around the support axis of the hinge arm 4. Can be opened and closed.

The pressure vessel front flange 2-2 forms the outer periphery of the opening (see Figures 1 and 3).

A circumferential lever support bracket 6 is provided on the pressure vessel front flange 2-2 to assist the sliding movement of the circumferential lever 5.

FIG. 2 is a partially cutaway view taken along the line A--A in FIG. 1, mainly showing the screwdriver 10.

In the figure, 2 is a copper plate of the pressure vessel, and 2-2 is the aforementioned front flange of the pressure vessel.

The door cover plate 1 is provided with a door cover plate reinforcing rib 1-1, and endless packing 7 is provided around the entire circumference of the inner outer end of the door cover plate.

As shown in Figures 1 and 2, the door cover plate end 1e
is pushed by the peripheral lever 5 to press the packing 7 against the pressure vessel front flange 2-2.

Here, screws will be briefly explained mainly with reference to FIGS. 2, 5, and 7.

The screwdriver 10 has a rod 9 extending perpendicularly to the input shaft 11.

When the rotation of this rod 9 is restricted (or a load above a certain level is applied), the input shaft 1
It is moved forward and backward by the rotation of 1.

The input shaft 11 has an output shaft 11 that further transmits rotational input from a motor or the like applied thereto.
out (see FIG. 5) is provided.

In this embodiment, the input shaft 11 and the output shaft 11out are integral rod-shaped members and are rotatably supported by a bearing (not shown) provided in the container of the screw jack 10.

A screw is provided between the input shaft 11 and the output shaft 11out (inside the container), which are both ends of the integral rod-shaped member, and this screw portion connects bearings 52, 5 inside the container.
Worm foil 5 rotatably provided at 3
1.

A rod 9 (see FIGS. 2 and 7) is connected to the female thread at the center of the worm foil 51 through its threaded portion 9-1.

The rod 9 is retracted in the direction indicated by T in the figure when the input shaft 11 is rotated in the forward direction and its rotation is restricted, and when the input shaft 11 is rotated in the reverse direction, its rotation is restricted. When restricted, it is ejected in the direction indicated by S in the figure.

Note that when the rotation is not restricted (when the load is extremely small), the rod 9 rotates along with the worm wheel 5, and in this state, the rod 9 does not move in the axial direction.

Screwdrivers 10 are currently commercially available and are standardized to withstand various loads.

For example, there are many types of screw shaft products available under the trade name "Screw Shaft" which are equivalent to the above-mentioned rods and can produce an output of 1 ton to 200 tons.

In FIG. 2, reference numeral 8 denotes a mounting screw that is integrated with the tip rod 9 of the screw jack 10.

Attach the circumferential lever 5 to this mounting screw 8 as shown in the second figure.
is fixed.

The circumferential lever support bracket 6 is provided to absorb the swinging that occurs when the circumferential lever 5 moves laterally.

From the above, the tip rod 9 of the screwdriver 10 is T.
By moving in the direction of the arrow, a tightening force can be applied to the packing 7 to seal the internal and external pressures within the pressure vessel.

Similarly, when loosening the tightening force of the packing 7, by reversing the input rotation, the rod 9 moves in the direction of arrow S, and the rod 9 strokes until the tightening force gradually disappears and a certain gap is created. extend.

Reference numeral 12 shown in FIG. 2 is an adjustment screw for contacting the door cover plate portion of the circumferential lever 5 with the surface of the circumferential lever receiving plate 13, and 11 indicates the input shaft of the screw jack 10.

FIG. 3 is an enlarged view of section B shown in FIG. 1.

In FIG. 2, when the rod 9 at the tip of the screwdriver 10 moves laterally, when there is almost no resistance, the tip of the rod (including the rod) is configured to rotate in the direction of rotation of the rod 9 inside the screwdriver 10. .

For this reason, as the circumferential lever 5 moves in the direction of the arrow S in FIG. 2, the tightening force of the packing 7 becomes null. As shown in FIG. 3, the peripheral lever 5 is fixed with the mounting screw 8 of the rod 9 shown in FIG. 2, and as shown in FIG. I am getting R between degrees.

The circumferential lever 5 rotates and comes into contact with the flat surface of the circumferential lever support bracket 6, and the rotation stops at about 90 degrees.The circumferential lever 5 then moves in a linear rod motion again, and the circumferential lever 5 is separated from the door cover plate 1, and the door cover plate 1 is moved away from the door cover plate 1. be able to open up freely.

FIG. 4 is a cross-sectional view taken along line HH in FIG. 3. A peripheral lever receiving plate 13 is provided on the door cover plate 1 side.

FIG. 3 shows the movement of the circumferential lever 5. The closing and tightening of the door cover plate 1 is a completely opposite operation to the opening explained previously in FIG. 3, and the input rotation of the screw jack 10 in FIG. 2 is reversed.

As shown in FIG. 3, the circumferential lever 5 has no resistance in the opposite direction, so the circumferential lever 5 rotates in the direction of arrow G and hits the protrusion of the circumferential lever receiving plate 13 shown in FIG. 4, so that it cannot rotate. Then, while maintaining that position, it moves laterally in the direction of tightening the packing (in the direction of the arrow T of the rod 9 in FIG. 2) to apply a tightening force to the packing.

Further, 12 is an adjustment screw provided on the movable side of the circumferential lever 5. Since gears are used in the transmission mechanism to drive multiple screws, the levers all around the circumference do not necessarily move in exactly the same way, and there may be a discrepancy between the circumferential lever 5 and the surface of the circumferential lever receiving plate. may occur.

The adjustment screw 12 is provided to adjust this gap difference when tightening.

The peripheral lever receiving plate 13 is fixed to the door lid 1 with mounting bolts 14.

FIG. 5 is a system layout diagram of the transmission mechanism of the apparatus according to the present invention shown in FIG. 1, seen from the back side of the door cover plate. 10 is a screw jack, 11c is an output shaft 11
This is a coupling that connects out and the next input shaft 11.

Reference numeral 15 indicates a bevel gear or the like provided to change the direction of conduction.

All power sources are put together in one place, and as shown in FIG. 5, R is a reduction gear, T is a torque limiter, and M is a motor.

FIG. 6 is a diagram showing a second embodiment of the circumferential lever type automatic tightening device for door cover plates according to the present invention. In the transmission system of the first embodiment shown in FIG. 5, the screws 10 are connected and driven in series via coupling rings 11c.

In the second embodiment shown in FIG. 6, the rotation of the shaft 17 is transmitted to the screw jack 10 via gears 16, 16.

(Effects of the Invention) As explained in detail above, the lever-type automatic tightening device for the door cover plate of a pressure vessel, etc. according to the present invention tightly tightens or releases the door cover plate on the flange portion of a container having a rectangular opening. A door cover plate tightening device for a pressure vessel or the like includes a plurality of screws having a rod in a direction perpendicular to an input shaft, the rods being moved forward and backward by the rotation of the input shaft when the rotation thereof is restricted, and a rod of each of the screws. a circumferential lever fixed to the circumferential lever; a door cover plate-side protrusion that limits the rotation of the circumferential lever in a first direction; A flange-side protrusion for restricting rotation of the lever in the second direction is provided, and the drive means is configured to transmit forward and reverse rotational force to the input shaft of the screw jack.

Therefore, it is possible to provide a safe automatic tightening device for a lever around a door lid plate of a pressure vessel or the like with a simple configuration in a narrow space.

[Brief explanation of the drawing]

FIG. 1 is a view of a first embodiment of a circumferential lever type automatic tightening device for a door cover plate according to the present invention, viewed from the front (direction toward a closed door). Figure 2 shows the first
It is a partially broken view taken along the line indicated by A-A in the figure, and mainly shows the screws. FIG. 3 is an enlarged view of the portion indicated by B in FIG. 1. FIG. 4 is a sectional view taken along line HH in FIG. 3. Figure 5 shows the first
FIG. 2 is a view of the door cover circumferential lever type automatic tightening device according to the present invention shown in the figure, viewed from the direction shown in FIG. 2, and mainly shows the system arrangement of the transmission mechanism. FIG. 6 is a diagram showing a second embodiment of the circumferential lever type automatic tightening device for a door cover plate according to the present invention, and is a view seen from the same direction as FIG. 5. FIG. 7 is a sectional view of a screwdriver, etc. 1...Door cover plate, 1e...Door cover plate end, 1-1...
Reinforcing rib of door cover plate, 2...Copper plate of pressure vessel, 2-
2... Pressure vessel front flange, 3... Door cover handle, 4... Hinge arm, 5... Peripheral lever, 6... Peripheral lever support bracket, 7... Packing, 8... Screw jack tip rod installation screw, 9... Screw jack tip rod, 10...Screw jack (jack), 1
0a...Screw jack bottom protrusion, 11...Input shaft, 1
1c...Coupling, 11out...Output shaft, 12...
Adjustment screw, 13... Circumferential lever receiving plate, 14... Circumferential lever receiving plate mounting bolt, 15... Bevel gear, 16...
Gear pair, 17...rotating shaft, T...torque millimeter, M
...Motor, (2) Figures 1 to 6 of the attached drawings are corrected to Figures 1 to 6 of the attached drawings.

Claims (1)

[Scope of Claims] 1. In a door lid tightening device for a pressure vessel, etc., which tightly tightens or releases a door lid plate from a flange portion of a container having a rectangular opening, the door lid plate is attached to the flange portion in a closed position. a plurality of screws arranged at a plurality of locations surrounding the outer periphery of the door cover plate and having rods perpendicular to the input shaft, the rods being moved forward and backward by the rotation of the input shaft when the rotation thereof is restricted; a circumferential lever fixed to a rod of a screwdriver; a door cover plate-side protrusion that limits rotation of each of the circumferential levers in a first direction when the door cover plate is in the closed position; a flange-side protrusion that limits rotation of the peripheral lever in the second direction at a position where the lever is removed from the outer periphery of the door cover plate; and a drive means that transmits forward and reverse rotational force to the input shaft of each screw jack. In the closed position of the door cover plate, the driving means applies a positive rotation to the input shaft, and the rotation of the circumferential lever after the rotation in the first direction is restricted by the protrusion on the side of the door cover plate causes the rotation of the input shaft. The rod is pulled in and tightly tightened, and after loosening the tightening of the peripheral lever by reverse rotation, the rod is pulled out by a second rotation after the rotation is restricted by the flange side protrusion. A door cover plate tightening device for pressure vessels, etc., characterized by the following features: 2. The lever-type automatic tightening device for a door cover plate of a pressure vessel or the like according to claim 1, wherein the opening of the container is quadrilateral. 3. The screw jacks have an output shaft integrated with an input shaft, and the screw jacks are linearly arranged along the sides of the rectangular opening, and the screw jacks are sequentially driven in series by the driving means. A lever-type automatic tightening device for the door cover of a pressure vessel, etc., as described in item 1. 4. A patent in which each of the screws is linearly arranged along the sides of the rectangular opening, and rotational force is transmitted from the drive shaft of the drive means, which is also arranged along the side, through a pair of gears. A lever-type automatic tightening device for a door cover of a pressure vessel, etc., as set forth in claim 1.