JPS6311231B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat-insulating lid that prevents heat radiation from the liquid surface of a heating tank and evaporation loss, and particularly relates to the structure of a large-layer heat-insulating lid. It is.

[Prior Art] Large tanks such as pre-painting treatment tanks such as degreasing zinc phosphate film treatment and paint stripping tanks are heated with steam or electric heaters, but the liquid surface is generally open. If the upper part is open, heat radiation loss and vaporization latent heat loss due to liquid evaporation are large, which is not preferable from an energy standpoint.

As a countermeasure to this problem, it has been proposed to provide a heat insulating lid. The heat-insulating lid is a wetted type (for example, JP-A-57
−134577) and non-wetted type (for example,
-35369).

[Problems to be Solved by the Invention] To explain the problems of the prior art using a simple conventional model, Figures 1 and 2 show a simple conventional example of a wetted type, in which a liquid float agent is placed in a tank 1. 2 or a method of floating a solid float material 3, but there are problems with quality and problems with products or processed materials being carried out. FIG. 3 also shows a case in which a large float member 4 is used in a wetted type, but in this case there are problems in that the entire top surface of the tank cannot be covered and that stirring of the liquid is inhibited. Furthermore, the method disclosed in Japanese Unexamined Patent Publication No. 57-134577 has a similar problem. Figure 4 shows a simple example of a non-wetted type, but the lid 5 itself is large, and the large one-piece thermal insulation lid 5 can be opened and closed when the building is low or there is an obstacle above it. I can't hire someone because I can't. Furthermore, the device disclosed in Japanese Utility Model Publication No. 54-35369 has the problem that the drive mechanism is complicated and large.

In order to promote energy saving measures by suppressing heat radiation and evaporation loss from the liquid surface of the heating tank without causing quality or processing problems, the present invention has been designed to have good heat retention performance and an opening/closing mechanism. The purpose of the present invention is to provide a heat-retaining lid that is simplified and advantageous in terms of space.

[Means for Solving the Problems] In order to achieve this object, the heat insulation lid of the present invention is a heat insulation lid in which both sides of a closed cell type foam insulation material reinforced with a frame and having low moisture absorption are covered with panels. A heat-insulating lid is constructed from a plate, and the heat-insulating lid is divided into two at the center into a front lid and a rear lid, and a hinge on the opposite side of the rear lid is attached to the upper end of the tank so that the rear lid can be opened and closed. The front lid and the rear lid are connected by a hinge on the inner surface of the insulation lid so that when the insulation lid is opened, the insulation lid has a half-folding structure and is lifted upward at the half-folding connection point. A guide roller is provided at the end of the lid opposite to the rear lid and at a side edge of the front lid at a right angle to the dividing line between the front lid and the rear lid, and a guide roller is provided on the upper end surface of the tank on the rear lid side. A guide rail for the guide roller is provided which is tilted upward toward the direction of the tank, and the guide roller is rotatably engaged with the guide rail, thereby forming a non-wetted heat-insulating lid that covers the entire top surface of the tank. A heat insulating lid characterized in that one location in the front and back direction of the lid is connected via a wire or chain to a winding device provided diagonally above and at the rear of the rear lid.

An arm extending toward the rear lid side from the dividing line between the front lid and the rear lid is received on the rear lid side of the front lid, the wire or chain is engaged with the arm, and one end of the wire or chain is received. is preferably connected to the winding device, and the other end is connected to a fixed part unrelated to the opening/closing operation of the heat-insulating lid.

[Function] In such a structure, the heat insulating board is made of a heat insulating material with low hygroscopicity and good heat insulating properties that has air bubbles inside, and is further laminated with panels on both sides, which have extremely excellent heat retention, waterproof, and moisture proof properties. Since the structure is made of high-quality materials, good heat retention performance can be obtained. In addition, since it is a non-wetted type, it is less susceptible to contamination from liquid. In addition, the insulation lid has a two-part structure, and each lid is supported by a hinge so that it folds in half when opened, which greatly alleviates the space constraints of conventional large lids. , an optimal thermal insulation lid structure can be obtained for use in large tanks. In this case, the lid is closed by loosening the hoisting device and using the lid's own weight.
After the guide roller comes into contact with the guide rail, a part of its own weight is converted into an opening force by the inclination of the guide rail, so the closing operation is smooth.
Moreover, the opening/closing mechanism is also simple.

[Embodiments] Preferred embodiments of the present invention will be described below with reference to the drawings.

5 to 8 show a heat-insulating lid (including its opening/closing mechanism) according to an embodiment of the present invention,
In the figure, 6 indicates the entire heat-insulating lid that covers the entire upper surface of the heating tank 7. The heat insulation lid 6 has a central part,
It is divided into two parts, a front lid 8 and a rear lid 9. The front lid 8 and the rear lid 9 are bent toward the inside of the insulation lid 6 by a hinge 10 on the inside (that is, half-folded). They are connected in such a way that they can be folded in half (by lifting the connection point upward). The edge of the rear lid 9 opposite to the front lid 8 is connected to one upper edge of the heating tank 7 by a hinge 11, and the rear lid 9 can be opened and closed using the hinge 11 as a fulcrum.

To open and close the rear lid 9, a chain or wire 13 hooked through a hook to an eye bolt or round hole, etc., is connected to an engaging part 12 provided at the end of the rear lid 9 on the front lid 8 side. This is done by forcibly winding up the lid using a winding device 14 provided diagonally above and at the rear, such as an electric chain block or a hoist, or by lowering the lid using its own weight. Directly below the hoisting device 14, a guide sprocket or guide pulley 15 is provided so that the chain or wire 13 is hoisted in a vertical direction.

The front lid 8 is attached to both edges of the front lid 8 on the rear lid 9 side.
An arm 17 is provided that extends from a dividing line 16 between the rear lid 9 and the rear lid 9 to the rear lid 9 side. Arm 17
A wire or chain 1 is attached to the tip of the rear lid 9 side.
The other end of the wire or chain 18 is connected to a fixed part (anchor) 19 behind the rear lid 9 that is unrelated to the opening/closing operation of the rear lid 9. Guide rollers 20 are provided at the ends of the front lid 8 opposite to the rear lid 9 and on both side edges of the front lid 8 that are perpendicular to the dividing line 16 between the front lid 8 and the rear lid 9. is rotatably supported. At the upper end of the heating tank 7 at a position corresponding to the position of the guide roller 20, a guide rail 21 is provided which extends along the upper edge of the heating tank 7 and gradually becomes higher toward the rear lid 9 side. and the guide roller 2
0 can roll on a guide rail 21. The inclined guide rail 21 generates a force component in its own weight that tends to separate the front end of the front lid and the rear end of the rear lid when the guide roller comes into contact with the guide rail when closing the lid, thereby smoothing the closing operation.

A limit switch 22 is attached to the side edge of the rear lid 9 on the front lid 8 side. A confirmation signal for closing the lid 9 is generated. limit switch 22
The mounting and detection may be done by attaching it to the heating tank 7 side and providing a detection bracket on the rear lid 9 side to detect the closing of the rear lid 9. A limit switch 23 is received so as to be able to come into contact with the upper surface of the rear lid 9 when the rear lid 9 is completely opened, that is, when the rear lid 9 is in an almost vertical state. The open state can be confirmed.

FIG. 9 shows a cross-sectional structure of the heat-retaining lid 6, and the heat-retaining lid 6 is made up of a frame 24 made of steel and a heat-retaining plate 25 stretched over it. Heat insulation board 2
Reference numeral 5 is made of a foamed heat insulating material 26 of a closed cell type with low hygroscopicity (therefore, low heat transmittance), for example, a hard foamed urethane material 26 laminated with colored iron plates 27 as panels on both sides.

In the heat-insulating lid of the present invention having the above-mentioned configuration, the opening/closing operation of the heat-insulating lid 6 is performed as shown in FIG. 7. That is, the opening operation of the heat-insulating lid 6 is such that the rear lid 9 is rolled up by the winding device 14 and opened using the hinge 11 as a fulcrum, and the front lid 8 is bent downward from the parting line 16 to be in a half-folded state. It is done. This half-folded state of the front lid 8 progresses as follows. The wire or chain 18, which was relaxed when the insulation lid 6 was closed, becomes tense as the insulation lid 6 is opened, and when the opening operation of the insulation lid 6 proceeds in a tense state,
The front lid 8 is moved upward together with the end of the rear lid 9 while the angle around the hinge 10 is restricted by the wire or chain 8, and gradually transitions from a horizontal state when closed to a vertical state. In this way, the front lid 8
As the rear cover 9 opens, the front cover 8 gradually becomes half-folded while its own weight and the tension of the wire or chain 18 are balanced. No impact force is applied due to rotation around the hinge 10, and smooth operation is performed. Moreover, the front end of the front lid 8 is supported by the guide roller 20 during the opening operation, and the guide roller 20 is supported by the guide rail 20.
1, the front end portion is lifted while being smoothly guided along the upper edge of the heating tank 7. When the rear lid 9 is opened to a nearly vertical position, the front lid 8 is also in a nearly vertical half-folded position, and the vertical position of the rear lid 9 is detected by the limit switch 23, and the winding operation of the winding device 14 is stopped. be done. Since the insulation lid 6 is in a half-folded state when it is opened, the space occupied by the insulation lid 6 in the upward direction is approximately 1/2 that of a one-piece lid.
significantly reduced.

The closing operation of the heat retaining lid 6 is completely opposite to the opening operation, and the front lid 8 is lowered while gradually opening from a vertical half-folded state to a horizontal state as the rear lid 9 is closed. When the front end of the front lid 8, that is, the guide roller 20 reaches the position of the guide rail 21, the guide roller 20 guides the guide rail 21 while converting some of its own weight into an opening force due to the inclination of the guide rail 21. While being rotated, the front lid 8 is rotated around the hinge 10 until it is in a horizontal state.
The heat retaining lid 6 is closed. The limit switch 22 detects that the rear lid 9 is completely closed, and the lowering operation of the hoisting device 14 is stopped.
Since the front lid 8 is guided by the guide rollers 20 until it is completely closed, it is smoothly closed until the end, that is, until the lower surface of the front lid 8 is completely in close contact with the upper end surface of the heating tank 7. The rear lid 9 is closed by its own weight until it comes into close contact with the upper end surface of the heating tank 7, but by checking this with the limit switch 22 at the position where the rear lid 9 has the largest vertical movement, it is completely closed. A closed state is guaranteed. By smoothly closing both the front lid 8 and the rear lid 9 until they are completely closed, the sealing rate is close to 100%, and heat radiation and evaporation from the liquid surface in the heating tank 7 are suppressed, resulting in a good sealing rate. Energy saving effect can be obtained. In addition, the cross-sectional structure of the heat insulating board is made of a foamed heat insulating material 26 with low hygroscopicity and a good cross-section with closed cells inside, and both sides of the foamed heat insulating material 26 are covered with panels 27, resulting in extremely excellent heat retention. Waterproof and moisture-proof properties are obtained, and since the panel 27 serves not only to protect the heat insulating material 26 but also to reinforce it, it also has excellent strength. Therefore, the heat retaining lid 6 has good heat retaining performance and can easily be made larger.

[Effects of the Invention] As explained above, when using the heat retaining lid of the present invention, the following effects are obtained.

(a) Since it is a non-wetted type, it is possible to obtain good heat retention performance without the quality or processing problems of conventional float types.

(b) The structure of the heat-insulating plate of the heat-insulating lid is such that both sides of the foam heat-insulating material, which has low moisture absorption, are protected by panels, so excellent heat-retaining, waterproof, and moisture-proof properties can be obtained.

(c) Since the insulation lid is divided into two parts and can be opened in a half-folded state, the insulation lid can be easily installed even in low places in the building or in areas with obstacles.

(d) The opening/closing mechanism is simplified because the heat-insulating lid, which is divided into two parts, is lifted and opened using a wire or chain, and the wire or chain is loosened and the lid is closed by its own weight.

(E) Since the guide rail is tilted, when the guide roller comes into contact with the guide rail when closing the lid, an opening force is applied to the front lid and the rear lid, making the closing operation smooth.

(F) Due to good heat retention performance and good sealing performance,
The work environment can be improved and the building and equipment can be prevented from corrosion. Moreover, the insulating lid structure can be easily adopted and smooth opening/closing operation can be achieved, so it is possible to combine the control of the opening/closing device with the workpiece transport device, etc. This makes it possible to fully automate processing and transportation.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an example of a conventional liquid float, Fig. 2 is a longitudinal cross-sectional view showing an example of a conventional solid float, and Fig. 3 is a longitudinal cross-sectional view showing an example of a conventional flat float. 4 is a vertical cross-sectional view showing an embodiment of a conventional one-piece heat-insulating lid, FIG. 5 is a plan view of a heat-insulating lid according to an embodiment of the present invention, and FIG.
7 is a side view of the device shown in FIG. 5, FIG. 8 is a partial side view of the device shown in FIG. 5, and FIG. 9 is a sectional view of the heat-insulating lid. 6... Warming lid, 7... Warming tank, 8... Front lid,
9... Rear lid, 10, 11... Hinge, 12... Engaging portion, 13, 18... Chain or wire, 14
... Winding device, 16 ... Parting line, 17 ... Arm, 19 ... Fixed part, 20 ... Guide roller, 2
1... Guide rail, 22, 23... Limit switch, 24... Frame, 25... Heat insulation plate, 2
6...Foam insulation material, 27...Colored iron plate as a panel.

Claims (1)

[Scope of Claims] 1. A heat-insulating lid is constructed from a heat-insulating board made of a closed-cell foam heat-insulating material with low moisture absorption that is reinforced by a frame and covered with panels on both sides. and a rear lid, and the end of the rear lid opposite to the front lid is connected to the upper edge of the tank with a hinge so that the rear lid can be opened and closed, and the front lid and the rear lid are connected to the inner side of the insulation lid. The hinge connects the heat-insulating lid so that it becomes a half-fold structure when the heat-insulating cover is opened, and lifts upward at the half-fold connection point, and the front cover is connected at the end opposite to the rear cover and in front of the front cover. A guide roller is provided on a side edge perpendicular to a dividing line between the front cover and the rear cover, and a guide rail for the guide roller is provided on the upper end surface of the tank and is inclined upward toward the rear cover side. The guide rollers were engaged with the guide rails so as to be able to roll freely, thereby forming a non-wetted heat-insulating lid that covered the entire top surface of the tank, and one location of the heat-insulating lid in the front and back direction was provided diagonally above and at the rear of the rear lid. A heat-insulating lid characterized in that it is connected to a hoisting device via a wire or a chain. 2 receiving an arm on the rear lid side of the front lid that extends toward the rear lid side from a dividing line between the front lid and the rear lid;
Claim 1, wherein the wire or chain is engaged with the arm, one end of the wire or chain is connected to the hoisting device, and the other end is connected to a fixed part unrelated to the opening/closing operation of the heat insulating lid. Insulating lid as described in section.