Pneumatic biasing device for a pre-press

Abstract

The invention discloses a kind of pre-press pneumatic deviation adjusting device.It includes in pre-press section for executing deviation adjusting action pneumatic actuator and for detecting whether the belt in pre-press section runs deviation rotary disc detection device, rotary disc detection device has detection rotary disc for abutting on the side edge of belt and detection adjusting unit matched with detection rotary disc, detection adjusting unit is connected with pneumatic actuator and can control pneumatic actuator action.The advantage is: automatic detection, automatic adjustment is realized;The whole process only needs to provide compressed air on site, without additional power supply driving;Not only can solve the problem of belt deviation well, but also avoid frequent replacement of wearing parts, reduce manufacturing and operating cost, improve the stability and reliability of production line, increase the economic benefit of enterprise;Its production is easy, quality is guaranteed;Installation is convenient, without artificial maintenance frequently, and the operating cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to an auxiliary device in a pre-press machine of a wood-based panel production line, in particular to a pre-press machine pneumatic deviation adjusting device. BACKGROUND

[0002] The pre-press machine is one of the key equipment in the forming section of the wood-based panel production line, and the pre-press machine belt deviation is a common phenomenon. However, long-time deviation operation not only causes material leakage and abnormal wear of the belt, but also causes the belt edge to be torn, thereby reducing the service life of the belt. More seriously, the belt deviation will affect the normal work of the whole production line, causing the decline of productivity. In the prior art, the mechanical deviation adjusting device is usually used to adjust the deviation, which is a combination of a travel switch, a photoelectric switch and a speed reducer. This method cannot eliminate the damage to the switch detection device caused by the longitudinal movement of the belt. On the other hand, the parts are easy to be damaged, the reaction speed is slow during use, the stability and reliability are relatively poor, the operation and maintenance are very troublesome, and the manufacturing and using costs are very high. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a pre-press machine pneumatic deviation adjusting device which can not only solve the problem of belt deviation and prolong the service life of the belt, but also effectively improve the stability and reliability of the production line.

[0004] In order to solve the above technical problems, the pre-press machine pneumatic deviation adjusting device of the present application comprises a pneumatic actuator for performing deviation adjusting action in the pre-press section and a rotary disc detection device for detecting whether the belt in the pre-press section deviates, the rotary disc detection device has a detection rotary disc for abutting against the side edge of the belt and a detection adjusting unit cooperating with the detection rotary disc, the detection adjusting unit is connected with the pneumatic actuator and can control the action of the pneumatic actuator, the detection rotary disc detects the deviation information of the belt and transmits the detected information to the detection adjusting unit, and the detection adjusting unit controls the deviation adjusting action of the pneumatic actuator according to the detection information.

[0005] The detection adjusting unit is a two-position three-way reversing valve; the air inlet end of the two-position three-way reversing valve is connected with an air inlet pipe for conveying compressed air, and the two air outlet ends of the two-position four-way reversing valve are respectively connected with two execution components of the pneumatic actuator through an air outlet pipe.

[0006] The pneumatic actuator comprises a supporting device with a bearing, an adjusting device with a bearing and a deviation adjusting roller installed between the supporting device and the adjusting device.

[0007] The pre-pressing section further has a tensioning roller and a pressing roller for supporting the belt, and the tensioning roller, the biasing roller and the pressing roller are not in the same horizontal position and form an angle between the biasing roller and the belt.

[0008] The adjusting device is composed of a base, a self-aligning bearing seat and two safety air bags as executing components installed between the base and the self-aligning bearing seat, and two air outlet pipes are connected to the interfaces of the two safety air bags.

[0009] The rotating disc detection device further comprises a support and a bracket installed on the support, the two-position three-way reversing valve is arranged between the detection rotating disc and the bracket, the detection rotating disc has an arc-shaped detection surface, and the outer edge of the arc-shaped detection surface of the detection rotating disc abuts against the side edge of the belt.

[0010] The two-position three-way reversing valve is provided with a mounting seat, a hinged shaft is fixedly installed on the mounting seat, the detection rotating disc is hinged to the hinged shaft through a suspender and forms a hinged point A, and the operating rod of the two-position three-way reversing valve is hinged to the suspender and can push the detection rotating disc to swing with the hinged point A as a fulcrum.

[0011] The bracket is installed on the support through an adjusting seat, and the height of the bracket and the front and back positions of the bracket can be adjusted through the adjusting seat.

[0012] The detection rotating disc is installed on the suspender through a rotating shaft and can freely rotate around the rotating shaft.

[0013] The advantages of the present application are as follows:

[0014] When the air source is connected, the two-position three-way reversing valve is switched through the displacement change of the detection rotating disc, and when the belt runs, the detection rotating disc rotates under the driving of the belt, automatically detects the belt deviation and controls the pneumatic executing mechanism to perform a deviation correction action through the two-position three-way reversing valve, so that the belt always runs within the set range, and automatic detection and automatic adjustment are realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the principle of the pneumatic deviation adjusting device of the pre-pressing machine.

[0016] Figure 2 Structure diagram of pneumatic actuator in the application;

[0017] Figure 3 Structure diagram of A direction of the application; Figure 2 Structure diagram of A direction of the application;

[0018] Figure 4 Structure diagram of the rotary disc detection device in the application. DETAILED DESCRIPTION

[0019] The pre-press pneumatic deviation adjusting device in the application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] As shown in the drawings, the pre-press pneumatic deviation adjusting device in the application is located between the tensioning roller and the press roller of the pre-press section at the front end of the pre-press machine, and it comprises a pneumatic actuator 1 for performing deviation adjusting action in the pre-press section and a rotary disc detection device 2 for detecting whether the belt 3 in the pre-press section deviates, wherein the rotary disc detection device 2 comprises a support 11 as the bottom support, a bracket 13 installed on the support, a detection rotary disc 12 for abutting against the side edge of the belt, and a detection adjusting unit cooperating with the detection rotary disc 12, the detection adjusting unit is arranged between the detection rotary disc 12 and the bracket 13, the detection rotary disc 12 has an arc-shaped detection surface, the outer edge of the arc-shaped detection surface of the detection rotary disc 12 abuts against the side edge of the belt, the detection adjusting unit is connected with the pneumatic actuator 1 and can control the action of the pneumatic actuator 1, wherein the detection adjusting unit in the embodiment is a two-position three-way reversing valve 4; the two-position three-way reversing valve 4 has a valve seat 19, a valve rod 18 with a valve block installed in the valve seat, and an air inlet hole P, an air outlet hole A and an air outlet hole B arranged on the valve seat, the air inlet end of the two-position three-way reversing valve 4 is connected with an air inlet pipe for conveying compressed air, the two air outlet ends of the two-position three-way reversing valve 4 are respectively connected with two actuating components of the pneumatic actuator 1 through an air outlet pipe, the valve rod with the valve block cooperates with the air inlet hole P, the air outlet hole A and the air outlet hole B to realize air path switching, so as to make the two actuating components act, the deviation information of the belt is detected by the detection rotary disc 12 and transmitted to the two-position three-way reversing valve 4, and the two-position three-way reversing valve 4 controls the action of the two actuating components of the pneumatic actuator according to the obtained detection information to realize deviation correction action.

[0021] Further, as shown in the drawings, Figure 2 and Figure 3As shown, the pneumatic actuator 1 comprises a supporting device 5 with bearings, an adjusting device 6 with bearings, and a deviation adjusting roller 7 installed between the supporting device and the adjusting device, the adjusting device comprising two actuating components of the pneumatic actuator, the supporting device 5 and the adjusting device 6 being fixed to the two sides of the pre-press frame respectively, the tensioning roller, the pressing roller and the deviation adjusting roller cooperating with the deviation adjusting roller 7 to support the installation of the belt 3, the tensioning roller, the deviation adjusting roller and the pressing roller not being in the same horizontal position and the deviation adjusting roller forming an angle with the belt.

[0022] As shown, the adjusting device 6 comprises a base 8, a self-aligning bearing seat 9 with the bearings mentioned above, and two safety air bags 10 as actuating components installed between the base 8 and the self-aligning bearing seat 9, two air outlet pipes being connected to the interfaces A and B of the two safety air bags respectively, the supporting device 5 also having a supporting bearing seat 21 with bearings, the supporting bearing seat 21 and the self-aligning bearing seat 9 both using self-aligning bearings to allow the deviation adjusting roller to tilt at one end within a certain angle. Figure 3

[0023] Further, the support 11 of the rotating disc detecting device 2 is composed of a supporting seat and a vertical rod on the supporting seat, and the two-way three-way reversing valve 4 is installed between the detecting rotating disc 12 and the support 13, and the specific installation of the two-way three-way reversing valve 4 and the rotating disc detecting device 2 can be realized by the following structure: as shown, the left end face of the two-way three-way reversing valve 4 is provided with a mounting seat 15, the mounting seat 15 is fixedly provided with a hinge shaft 16, the detecting rotating disc 12 is installed on a hanger rod 17 through a rotating shaft and can rotate freely around the rotating shaft, so that the detecting rotating disc 12 can rotate with the belt and improve the operation reliability, the top end of the hanger rod 17 is hinged to the hinge shaft 16 and forms a hinge point C, and the valve rod 18 of the two-way three-way reversing valve 4 is hinged to the hanger rod and can push the detecting rotating disc 12 to swing with the hinge point A as the fulcrum. Figure 4

[0024] Further, the support 13 is a round rod, and the support 13 can also be installed on the support 11 through an adjusting seat 14, specifically, the adjusting seat 14 has a vertical mounting hole and a horizontal mounting hole, the vertical rod is connected in the vertical mounting hole and locked by rotating and locking the vertical rod locking bolt on the adjusting seat, so that the height position of the adjusting seat on the vertical rod can be adjusted to realize the height adjustment of the support, and the support 13 is connected in the horizontal mounting hole and locked by rotating and locking the support locking bolt on the adjusting seat, so that the different positions of the support 13 on the adjusting seat can be adjusted to realize the front and back positions of the detecting rotating disc 12.

[0025] ​​In use, by adjusting the position and angle of each orientation of the mounting bracket, the outer edge of the detection turntable with larger radius is attached to the edge of the belt. Under the action of air pressure, the arc-shaped detection surface of the detection turntable is always attached to the edge of the belt. Two safety air bags adopt a gas supply mode of one air supply and one air exhaust. The tension roller 7 swings left and right under the action of the safety air bags, so as to change the included angle between the belt and the tension roller, adjust the tension of the belt, and change the direction of belt deviation.

[0026] The specific working principle is as follows:

[0027] In work, the compressed air output from the pressure regulator 23 enters the air inlet hole P of the two-position three-way reversing valve 4 through the air inlet pipe 22. Since the two air outlet holes of the two-position three-way reversing valve 4 are respectively connected to the interfaces of the two safety air bags of the pneumatic actuator through an air outlet pipe, the self-aligning bearing seat can swing left and right. Therefore, when the valve rod moves to the left (i.e., the belt deviates to the side of the turntable detection device 2, as shown in FIG. 2), the two-position three-way reversing valve 4 is in the left position, and the compressed air in the air inlet hole P is discharged through the air outlet hole R. At this time, the air outlet hole L is closed, and the compressed air in the air outlet hole L is not discharged. The compressed air in the air inlet hole P drives the two safety air bags of the pneumatic actuator to expand, and the self-aligning bearing seat swings to the left. When the valve rod moves to the right (i.e., the belt deviates to the side of the turntable detection device 2, as shown in FIG. 3), the two-position three-way reversing valve 4 is in the right position, and the compressed air in the air inlet hole P is discharged through the air outlet hole L. At this time, the air outlet hole R is closed, and the compressed air in the air outlet hole R is not discharged. The compressed air in the air inlet hole P drives the two safety air bags of the pneumatic actuator to expand, and the self-aligning bearing seat swings to the right. Figure 1When the valve rod moves to the left position (i.e. the belt deviates to the side of the detection turntable 2), the compressed air entering the air inlet hole P enters the left airbag through the air outlet hole A and the interface A of the left airbag, and the left airbag is in the inflation state; at this time, due to the presence of the right valve block, the air outlet hole B is not communicated with the air inlet hole P, so the right airbag is in the exhaust state, and the deflection roller 7 is deflected; when the valve rod moves to the middle position (i.e. the belt is in normal contact with the detection turntable, and the detection turntable is in the vertical state), at this time, due to the left valve block and the right valve block respectively blocking the air outlet hole A and the air outlet hole B, the airbag is in the exhaust state, so the left airbag and the right airbag have the same internal cavity pressure, the deflection roller 7 is in the middle position, and the belt is in the balanced running state, i.e. no need to be corrected; when the valve rod moves to the right position (i.e. the belt deviates to the side away from the detection turntable 2), the compressed air entering the air inlet hole P enters the right airbag through the air outlet hole B and the interface B of the right airbag, and the right airbag is in the inflation state; at this time, due to the presence of the left valve block, the air outlet hole A is not communicated with the air inlet hole P, so the left airbag is in the exhaust state, and the deflection roller 7 is deflected; through the above analysis process, it can be seen that the technical scheme actually controls the position of the correction guide roller through the inflation and exhaust of the two airbags; during the correction process, when the belt deviates to the detection turntable direction and exceeds the set value, the detection turntable triggers the two-way valve to change direction, specifically, when the belt moves to the detection turntable direction, the detection turntable is pressed to the inside, and the movement exceeds the set value, the valve rod of the reversing valve acts, the two airbags act, the belt wrap angle on the tensioning roller decreases, and the belt starts to move in the opposite direction, realizing the deflection action in one direction; when the belt moves to the opposite direction of the detection turntable, the belt is separated from the detection turntable, the detection turntable has no pressure, i.e. the movement exceeds the set value, the valve rod of the reversing valve acts again, the two airbags act, the belt wrap angle on the tensioning roller increases, and the belt starts to move in the opposite direction, realizing the deflection action in the other direction, so that the belt always reciprocates within the set range, thereby achieving the purpose of deflection, and the deflection amount can be kept within ±10 mm, the deflection performance is stable and reliable, and the response speed is fast.

Claims

1. A pre-press pneumatic register device, characterized by: The device comprises a pneumatic actuator (1) for performing the deviation adjusting action in the pre-pressing section and a rotary disc detecting device (2) for detecting whether the belt (3) in the pre-pressing section is deviated, the rotary disc detecting device (2) has a detecting rotary disc (12) for abutting against the side edge of the belt and a detecting adjusting unit matched with the detecting rotary disc, the detecting adjusting unit is connected with the pneumatic actuator (1) and can control the action of the pneumatic actuator (1), the detecting rotary disc (12) detects the deviation information of the belt and transmits the detected information to the detecting adjusting unit, and the detecting adjusting unit controls the pneumatic actuator to perform the deviation adjusting action according to the detected information. The detecting adjusting unit is a two-position three-way reversing valve (4), the air inlet end of the two-position three-way reversing valve (4) is connected with an air inlet pipe for conveying compressed air, the two air outlet ends of the two-position three-way reversing valve (4) are respectively connected with two actuating components of the pneumatic actuator (1) through two air outlet pipes, the pneumatic actuator (1) comprises a supporting device (5) with a bearing, an adjusting device (6) with a bearing and a deviation adjusting roller (7) installed between the supporting device and the adjusting device, the adjusting device (6) is composed of a base (8), a self-aligning bearing seat (9) and two safety air bags (10) as actuating components installed between the base and the self-aligning bearing seat, and the two air outlet pipes are respectively connected with the interfaces of the two safety air bags. The rotary disc detecting device (2) further comprises a support (11) and a bracket (13) installed on the support, the two-position three-way reversing valve (4) is arranged between the detecting rotary disc (12) and the bracket (13), the detecting rotary disc (12) has an arc-shaped detecting surface, the outer edge of the arc-shaped detecting surface of the detecting rotary disc (12) abuts against the side edge of the belt, the two-position three-way reversing valve (4) is provided with a mounting seat (15), a hinge shaft (16) is fixedly installed on the mounting seat (15), the detecting rotary disc (12) is hinged on the hinge shaft (16) through a hanger (17) and forms a hinge point A, and an operating rod (18) of the two-position three-way reversing valve (4) is hinged on the hanger and can push the detecting rotary disc (12) to swing with the hinge point A as the fulcrum.

2. The pre-press pneumatic biasing device of claim 1, wherein: The pre-pressing section further has a tensioning roller and a pressing roller for supporting and installing the belt (3) matched with the deviation adjusting roller (7), the tensioning roller, the deviation adjusting roller and the pressing roller are not in the same horizontal position and make the deviation adjusting roller form an included angle with the belt.

3. A pre-press pneumatic biasing device according to claim 1 or 2, characterised in that: The bracket (13) is installed on the support (11) through an adjusting seat (14), the height of the bracket can be adjusted and the front and back positions of the bracket can be adjusted through the adjusting seat (14).

4. The pre-press pneumatic biasing device of claim 3, wherein: The detecting rotary disc (12) is installed on the hanger (17) through a rotating shaft and can freely rotate around the rotating shaft.

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