WO2008043279A1 - A method for connecting hot pressed board to pressing and lifting hydraulic cylinder and its device - Google Patents

Abstract

A method for connecting hot pressed board to pressing and lifting hydraulic cylinder in continuous flat press and its device are disclosed. The device includes a pressing hydraulic cylinder (1), a piston rod (2), L-shaped boards (3), a trapezoidal heat insulating pad (4), a baffle (5) and a heat insulating board (6), etc. The heat insulating pad is provided in the hooked groove between the L-shaped board and the piston pad so that there is less heat transfer and loss and effective protection at the inside structure of the piston rod. The present invention has the positive effects of simple reliable structure, obvious heat insulation and capacity of ensuring the continuous smooth running of the continuous flat press.

Description

 Method and device for connecting hot plate and pressure lifting hydraulic cylinder

 The invention relates to a technology for flat pressing continuous press hot pressing plate in a wood-based panel production equipment, in particular to a joining technology of a super long hot pressing plate and a pressurized lifting hydraulic cylinder in a continuous press. Background technique

 The invention is mainly used in the flat-press continuous press designed and developed in China for the first time, the length of the hot press plate of the continuous press is long, and the elongation after heating is large. The method and device for connecting the general pressure lifting hydraulic cylinder and the hot pressing plate adopt the method of fixing the ends at both ends: or fixing the flange and the machine member at one end of the piston rod; or fixing the spherical bearing at the other end (ie, the hinge) Such a connection method will transfer the heat of the hot plate to the pressurizing lifting hydraulic cylinder, or the joint interference with the pressurizing lifting hydraulic cylinder due to the heating and elongation of the hot pressing plate, which occurs on the extra long hot pressing plate. Will be prominent, which directly leads to the substandard accuracy of the wood-based panel products. Summary of the invention

 In order to overcome the above-mentioned deficiencies of the prior art, it is necessary to change the connection mode of the continuous press hot press plate and the pressurization lift hydraulic cylinder, so that the continuous press can operate normally and smoothly, and it is possible to produce high quality products. For this reason, it is the object of the present invention to design a new and reliable method and apparatus for connecting a pressurized lifting hydraulic cylinder. The technical proposal of the method and device for connecting the hot press plate and the pressurizing lifting hydraulic cylinder of the continuous press according to the present invention is to design a device to ensure the continuous press hot plate and the premise of ensuring the precision of the continuous press product. The pressurized lifting hydraulic cylinder has a simple and reliable device in actual installation adjustment and smooth operation. The technical solution of the present invention is specifically implemented by the following technical measures: a method for coupling a hot plate and a pressurizing lifting hydraulic cylinder of a continuous press of a wood-based panel, characterized in that two strips of left and right strips are used

The L-shaped plate 3 is embedded in the double hook groove at the top end of the piston rod 2, and is fixed on the hot pressing plate S by bolts 8. The heat insulating pad 6 is placed between the top end of the piston rod 2 and the hot pressing plate S, and is connected with the hot pressing plate S. The L-shaped plate 3 and the piston rod 2 are separated by a trapezoidal insulation pad 4, so that the hydraulic cylinder block 1 and the piston rod 2 are not subjected to heat conduction by the high-temperature hot platen S, and the L-shaped plate integrally assembled with the hot platen S is provided. 3 embedded in the double hook groove at the top of the piston rod, so the heating and elongation of the hot plate does not interfere with the connection of the pressurized lifting hydraulic cylinder, achieving the hair The steps are as follows: Firstly, the installation position of the hydraulic cylinder is determined. After the pressurized hydraulic cylinder 1 and the piston rod 2 are installed in position, the hydraulic cylinder 1 is located in the middle of the L-shaped plate 3 via the crane, that is, the double hook on the piston rod 2. The groove is properly matched with the left and right L-shaped plates 3. After the piston rod 2 is in place, the pressurized hydraulic cylinder block 1 is connected to the frame G by the lifting mechanism D. Since the hot platen S generates a high temperature of up to 220 ° C or higher during operation, the top end of the piston rod 2 is separated from the hot platen S by the heat insulating pad 4 to prevent heat conduction, and the L shape is in contact with the hot platen S. The plate 3 thus transfers heat to the piston rod 2, damaging the seal in the hydraulic cylinder. At this time, a trapezoidal groove is left between the L-shaped plate 3 and the double hook groove, and the trapezoidal groove is embedded in the trapezoidal insulation pad 4, which is effective The ground prevents heat transfer and loss. A device for realizing the above-mentioned method for coupling a hot plate and a pressure lifting hydraulic cylinder, characterized in that it is composed of a pressurized hydraulic cylinder 1, a piston rod 2, an L-shaped plate 3, a trapezoidal insulation pad 4, a baffle 5, and a heat insulation The pad 6, the screw 7, and the bolt 8 are composed of: the heat insulating pad 6 capable of withstanding the rated pressure of the hydraulic cylinder and having a temperature resistance above 250 ° C is first placed on the hot plate S below the piston rod 2, and the left and right sections are respectively The L-shaped plates 3 for inverting the L shape are symmetrically placed on both sides of the heat insulating mat 6, and the upper ends thereof are respectively embedded in the left and right slots of the piston rod 2, and are connected to the hot platen S through the eight hexagon socket bolts 8. The L-shaped plate 3 is made of 45 steel. Because it is in direct contact with the hot platen, and the hydraulic cylinder is lifted, the L-shaped plate 3 is subjected to a certain impact load. The quenching and tempering treatment HB220-250 is used to improve the toughness and strength. The connected hexagon bolt 8 is made of carbon steel and has a mechanical property rating of 10. 9. The trapezoidal insulation pad 4 having the same properties and requirements as the insulation pad 6 is mounted on the inner side of the left and right L-shaped plates 3 for easy installation and disassembly. The plates 5 are respectively fixed to the front and rear pistons of the heat insulating mat 6 by two screws 7 The front and rear ends of the rod 2, the piston rod 2 is made of 45 # forged steel, and the overall quenching and tempering treatment of HB220-250, so that it has good comprehensive mechanical properties, can withstand heavy loads and impact, the head is processed into a double hook groove shape, The trapezoidal insulation mat 4 provides a good installation environment, increases its contact surface, and effectively protects the internal structure of the piston rod 2 when the operating temperature is too high. A gap of 1.5 mm - 5.5 mm is left between the trapezoidal insulation pad 4 and the insulation pad 6 and the L-shaped plate 3 to ensure the amount of expansion and effectively use air to isolate and prevent heat transfer. The installation step of the joint structure of the present invention is: First, the installation position of the hydraulic cylinder is determined. After the pressurized hydraulic cylinder block 1 and the piston rod 2 are installed in position, the hydraulic cylinder 1 is located on the L-shaped plate 3 via the crane, and the piston rod 2 at this time The upper double hook groove is properly matched with the L-shaped plate 3. After the piston rod 2 is in place, the pressurized hydraulic cylinder block 1 is connected to the frame G by the lifting mechanism D. Since the hot platen S can generate a high temperature of up to 220 ° C or higher during operation, the top of the piston rod 2 is separated from the hot platen S by the heat insulating pad 4 to prevent heat conduction, and the L shape is in contact with the hot platen S. The plate 3 thus transfers heat to the piston rod 2, damaging the seal in the hydraulic cylinder, At this time, a trapezoidal groove is left between the L-shaped plate 3 and the double hook groove, and the trapezoidal heat insulating pad 4 is embedded in the trapezoidal groove, thereby effectively preventing heat transfer and loss. The baffle 5 and the piston rod 2 are connected by a screw 7, which functions to block the trapezoidal heat insulating mat 4.

 The positive effect of the invention is that the structure is simple and reliable, the installation is convenient, and the heat insulation effect is obvious. In the case of heating and elongation of the hot pressing plate, the pressure lifting hydraulic cylinder and the hot pressing plate are still connected reliably, and the lifting is in place, thereby avoiding unnecessary The hinge structure ensures the normal operation of the pressurizing lifting hydraulic cylinder and the hot pressing plate, so that the continuous press can be continuously and smoothly operated. DRAWINGS

 Figure 1. Front view of the coupling structure of the hot plate and the pressurized lifting hydraulic cylinder of the present invention;

 Figure 2. Side view of the coupling structure of the hot plate and the pressurized lifting hydraulic cylinder of the present invention;

 Figure 3 is a cross-sectional view taken along line A-A of Figure 1 of the present invention (enlarged);

 Figure 4. Schematic diagram of the double-hook groove of the piston rod of the hot plate and the pressurized lifting hydraulic cylinder of the present invention (enlarged)

 Figure 5 is a cross-sectional view taken along line B-B of Figure 4 of the present invention.

 The legend marks in the drawing represent the following components:

 1 a hydraulic cylinder 2 a piston rod 3 - L-shaped plate

 4 a trapezoidal insulation pad 5 — baffle 6 ― insulation pad

 7 one screw 8 — bolt S a hot plate

 D a lifting mechanism C ― frame specific implementation

The present invention will be further described below with reference to FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5 and the embodiment. This embodiment is a joint of a continuous press hot plate and a pressurizing lifting hydraulic machine for producing 8-foot particle board. The structure, as shown in the structure of Fig. 1, is mainly composed of a pressurized hydraulic cylinder 1, a piston rod 2, an L-shaped plate 3, a trapezoidal insulation pad 4, a baffle 5, a heat insulating mat 6, a screw 7, and a bolt 8. composition. The heat insulating mat 6 is placed between the hot pressing plate and the piston rod 2, so it has special requirements for its material, the temperature resistance must be above 250 ,, and it can withstand the extreme surface pressure, and can withstand the rated pressure of the hydraulic lifting cylinder 300Kg. Pressure, this embodiment uses a 3424 laminated glass cloth board that meets the above conditions, and the left and right L-shaped plates 3 are used. 45 steel, because it is directly in contact with the hot platen, and the hydraulic cylinder is lifted, the L-shaped plate 3 must withstand a certain impact load, using the quenching and tempering treatment HB220-250, to improve the toughness and strength, and the 8 bolts connected thereto 8 is M27 X2 X 180mm, the material is carbon steel, the mechanical performance grade is 10.9. The trapezoidal insulation pad 4 has the same properties and requirements as the insulation pad 6, and its shape is convenient for installation and disassembly. The piston rod 2 (Fig. 4) adopts 45 # forged steel and adopts the overall quenching and tempering treatment HB220-250. The piston rod 2 has good comprehensive mechanical properties, can withstand heavy loads and impacts, and the head is processed into a double hook groove shape. The insulating mat 4 provides a good installation environment, increases its contact surface, and effectively protects the internal structure of the piston rod 2 when the operating temperature is too high. The front and rear two baffles 5 are respectively fixed at the front and rear ends of the piston rod 2 with two M16X45mm screws 7 for blocking the insulation pad 6 and the trapezoidal insulation pad 4, between the trapezoidal insulation pad 4 and the insulation pad 6 and the L-shaped plate 3. There is a gap of 3mm, which not only ensures the amount of expansion but also effectively uses air to isolate it and prevent its heat transfer.

Claims

Rights request  1. A method for coupling a hot plate and a pressurizing lifting hydraulic cylinder of a wood-based panel continuous press, characterized in that two left and right L-shaped plates [3] are embedded in a double hook groove at the top end of the piston rod [2] And is fixed on the hot plate [S] by the bolt [8], and the insulation pad [6] is placed between the top end of the piston rod [2] and the hot plate [S], and is connected to the hot plate [S]. The L-shaped plate [3] and the piston rod [2] are separated by a trapezoidal insulation pad [4], so the hydraulic cylinder [1] and the piston rod [2] are not subjected to heat conduction by the high temperature hot plate [S]. The L-shaped plate [3] integrally mounted with the hot plate [s] is embedded in the double hook groove at the top end of the piston rod, so that the heating plate does not cause interference problems in the connection of the pressurizing lifting hydraulic cylinder, and the present invention is realized. The steps are: First, determine the installation position of the hydraulic cylinder. After the pressurized hydraulic cylinder [1] and the piston rod [2] are installed in place, the hydraulic cylinder [1] is located in the middle of the L-shaped plate [3] via the crane, and the piston After the rod [2] is in place, the pressurized hydraulic cylinder block [1] is connected to the frame [G] by the lifting mechanism [D], and a trapezoidal slot is left between the L-shaped plate [3] and the double hook groove. Trapezoidal slot After the heat insulating mat embedded trapezoidal [4], effectively prevent heat transfer and dissipation.  2. Apparatus for realizing a method of coupling a hot platen and a pressurizing lifting cylinder according to claim 1, characterized in that it consists of a pressurized hydraulic cylinder [1], a piston rod [2], an L-shaped plate [ 3], trapezoidal insulation pad [4], baffle [5], insulation pad [6], screw [7], bolt [8], wherein: the insulation pad [6] is located below the piston rod [2] On the hot plate [S], the left and right sections of the L-shaped plate [3] with the inverted L shape are placed symmetrically on both sides of the insulation pad [6], and the upper ends are respectively embedded in the piston rod [2] In the left and right hook grooves, the hexagonal bolt [8] is connected to the hot plate [S], and the trapezoidal insulation pad [4] has the same properties and requirements as the insulation pad [6]. It is mounted on the left for easy installation and disassembly. On the inner side of the right L-shaped plate [3], the baffle [5] is respectively fixed to the front and rear ends of the piston rod [2] of the front and rear of the heat insulating mat [6] by two screws [7], the piston rod [2] The head is machined into a double hook groove shape, and a gap is left between the trapezoidal insulation pad [4] and the insulation pad [6] and the L-shaped plate [3].  The coupling device of the hot platen and the pressure lifting hydraulic cylinder according to claim 2, wherein the heat insulating pad [6] and the trapezoidal heat insulating pad [4] are capable of withstanding the rated pressure of the hydraulic cylinder. Temperature resistant to materials above 250 °C.  The coupling device of the hot platen and the pressurized lifting hydraulic cylinder according to claim 2, wherein the L-shaped plate [3] is made of 45# steel and subjected to quenching and tempering treatment of HB220-250.  5. The coupling device of a hot platen and a pressurized lift cylinder according to claim 2, wherein the hexagon socket head bolt [8] is made of carbon steel and has a mechanical property rating of 10.9. 6. The coupling device of the hot platen and the pressurized lifting hydraulic cylinder according to claim 2, wherein The piston rod [2] is made of 45 # forged steel, and the whole body is tempered to process HB22-250.  The coupling device of the hot platen and the pressure lifting hydraulic cylinder according to claim 2, characterized in that the trapezoidal insulation pad [4] and the insulation pad [6] and the L-shaped plate [3] are left between There is a gap of 1.5mm-5.5mm.