PCVD deposition machine tool holding furnace opening and closing device

Abstract

The application relates to a PCVD deposition machine heat preservation furnace opening and closing device, which is characterized by comprising a main beam, opening and closing connecting seats arranged at two ends of the main beam, left and right hinges connected with a half furnace body and hinged on two sides of the opening and closing connecting seats, inner sides of the left and right hinges being hinged with a lifting rod arranged above the middle, a synchronous crank driving assembly arranged below the main beam, the synchronous crank driving assembly being arranged with the lifting rods at two ends of the main beam, and the lifting rods being driven to lift to synchronously open and close the left and right hinges at two ends. The application is reasonable in arrangement, convenient to use, high in high-temperature resistance and reliability, the synchronous crank driving assembly can effectively improve the stability of the heat preservation furnace opening and closing mechanism, reduces the maintenance and repair cost, and guarantees the product quality of equipment deposition processing.

Description

TECHNICAL FIELD

[0001] The application relates to a PCVD deposition machine heat preservation furnace opening and closing device and belongs to the technical field of optical fiber production equipment. TECHNICAL BACKGROUND

[0002] PCVD is one of main processes for optical fiber preform processing, and the PCVD process is completed through a PCVD deposition machine. In the production process of the PCVD deposition liner tube, the liner tube completes the deposition process in a heat preservation furnace, which involves the opening and closing of the heat preservation furnace during the process of putting in and taking out the liner tube. The existing heat preservation furnace is a half-opening structure, and the opening and closing functions of the heat preservation furnace are completed through the extension and retraction of a gas cylinder. This structure has some defects. First, because the gas cylinder is close to the high-temperature furnace, the radiation heat will cause the sealing element in the gas cylinder to fail quickly, leading to unstable air flow and air pressure, and the opening and closing angles of the furnace will be greatly different, the opening and closing speed will be fast and slow at different times, and the equipment will be brought additional vibration and interference, and the maintenance workload of the equipment is large. Second, the poor sealing of the gas cylinder will also cause the half-opening heat preservation furnace to be not tightly closed, which will affect the temperature distribution in the heat preservation furnace, and thus directly affect the deposition processing quality of the liner tube. SUMMARY

[0003] The application aims to solve the problems existing in the prior art, and provides a deposition machine heat preservation furnace opening and closing device, which has reasonable structure, stable operation and high work reliability.

[0004] The application adopts the technical scheme that: a main beam is arranged, opening and closing connecting seats are arranged at both ends of the main beam, left and right hinges connected with a half furnace body are hingedly connected on both sides of the opening and closing connecting seats, the inner sides of the left and right hinges are hingedly connected with a lifting rod arranged above the middle, a synchronous crank driving assembly is arranged below the main beam, the synchronous crank driving assembly is arranged at both ends of the lifting rod of the main beam, and the lifting rod is driven to lift and lower to synchronously open and close the left and right hinges at both ends.

[0005] According to the above scheme, the synchronous crank driving assembly comprises a transmission shaft arranged below the main beam and longitudinally penetrating the main beam, the middle of the transmission shaft is connected with a rotary driving mechanism, and synchronous crank mechanisms are arranged at both ends of the transmission shaft.

[0006] According to the above scheme, the opening and closing connecting seat comprises a connecting seat body, the connecting seat body is in an inverted T shape, a boss protruding upward is arranged above the middle of the connecting seat body, the left and right hinges are hingedly connected on both sides of the lower end of the connecting seat body, the lifting rod is arranged in the middle of the connecting seat body, a fixed protrusion configured with the synchronous crank driving assembly is arranged on the middle of the lifting rod, the lower end of the lifting rod penetrates the connecting seat body and is hingedly connected with the inner sides of the left and right hinges through the left and right connecting rods.

[0007] According to the scheme, one end of the opening and closing connector installed at both ends of the main beam is a fixed opening and closing connector, and the other end is a movable opening and closing connector.

[0008] According to the scheme, the movable opening and closing connector is hinged to the two sides of the end of the main beam through two parallel connecting rods on each side of the connecting seat body boss, forming a parallelogram swing mechanism, so that the connecting seat body can swing in parallel.

[0009] According to the scheme, the fixed opening and closing connector is fixedly connected to one end of the main beam.

[0010] According to the scheme, the synchronous crank mechanism includes cranks installed on both ends of the transmission shaft, the installation orientation of the cranks on both ends of the transmission shaft is the same, the other end of the crank is provided with a curved roller, and the curved roller is arranged on the fixed protrusion on the lifting rod.

[0011] According to the scheme, the curved roller is located above the fixed protrusion, when the curved roller is turned down to the lower side, the fixed protrusion drives the lifting rod to move downward, the left and right connecting rods are opened to the left and right hinges, and the half furnace body is opened, when the curved roller is turned up to the upper side, the fixed protrusion drives the lifting rod to move upward, the left and right connecting rods are closed to the left and right hinges, and the half furnace body is closed.

[0012] According to the scheme, the rotary drive mechanism includes a motor and a speed reducer connected with the motor, and the output end of the speed reducer is connected with the transmission shaft through a chain wheel and chain device.

[0013] The beneficial effects of the present application are: 1. reasonable setting, convenient to use, high temperature resistance, high reliability, synchronous crank drive assembly can effectively improve the stability of the opening and closing mechanism of the holding furnace, reduce the maintenance and repair cost, and ensure the product quality of the equipment deposition processing. 2. The movable opening and closing connector is provided, so that the opening and closing connector at one end can move in parallel with the thermal expansion and contraction of the half furnace body, thereby eliminating the internal stress of the furnace body caused by thermal expansion and contraction, avoiding deformation and cracking of the half furnace body, and prolonging the service life of the furnace body. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a general structure of an embodiment of the present application.

[0015] Figure 2 It is a front view of the synchronous crank mechanism in an embodiment of the present application.

[0016] Figure 3 It is a side view of the movable opening and closing connector in an embodiment of the present application.

[0017] Figure 4 It is a perspective view of the movable opening and closing connector in an embodiment of the present application.

[0018] Figure 5 Figure 3 is a side view of the fixed opening and closing connecting seat in one embodiment of the present application.

[0019] Figure 6 Figure 4 is a perspective view of the fixed opening and closing connecting seat in one embodiment of the present application.

[0020] Figure 7 Figure 5 is a perspective view of the lifting rod in one embodiment of the present application.

[0021] Figure 8 、 Figure 9 Figures 6 and 7 are a side view and a front view, respectively, of the opening and closing connecting seat in use when the half furnace body is closed in one embodiment of the present application.

[0022] Figure 10 、 Figure 11 Figures 8 and 9 are a side view and a front view, respectively, of the opening and closing connecting seat in use when the half furnace body is opened in one embodiment of the present application. DETAILED DESCRIPTION

[0023] The present application will be further described below in conjunction with the drawings and embodiments.

[0024] The utility model relates to a kind of open-close connection seat of rectangular section, and the open-close connection seat is arranged at the both ends of the main beam, one end of the open-close connection seat arranged at the both ends of the main beam is fixed open-close connection seat 5, the other end is movable open-close connection seat 4, the open-close connection seat includes connection seat body, connection seat body is inverted T-shaped, upper middle part is provided with the boss projecting upward, the lower end of connection seat body is symmetrically hinged with left and right hinges 13,14 connected with half furnace body by pin shaft 22 in both sides, and the hinged hole in both sides of lower end is provided with shaft sleeve 21 and pin shaft 22 configuration, shaft sleeve 18 is arranged in the middle of connection seat body and is worn with lifting rod 25, the middle part of lifting rod is arranged with the fixed lug 24 configured with synchronous crank mechanism, the lower end of lifting rod passes through connection seat body and is hinged with left and right connecting rods 26,27 by hinged joint 12 and pin shaft 28, the other end of left and right connecting rods is hinged with the lower end of left and right hinge inner side respectively by pin shaft 19.The fixed open-close connection seat is fixedly connected with one end of the main beam by connection seat body 23;The movable open-close connection seat is connected with the other end of the main beam, and the both sides of the boss of connection seat body 11 are provided with inwardly extending connecting plate, each side connecting plate is hinged with two parallel arranged connecting rods 16,17 by pin shaft 20, the other end of two parallel arranged connecting rods is hinged with the both sides of the end of the main beam, to form a parallelogram swing mechanism, so that the connection seat body can swing in parallel, in addition, a connecting block 15 can be connected between the middle part of the two connecting rods 17 on the outside, the connecting block is located on the top of the boss of open-close connection seat, to prevent the connecting rod from falling off.Synchronous crank drive assembly 3 is arranged below the main beam, the synchronous crank drive assembly includes transmission shaft 7 arranged below the main beam by bearing seat and longitudinally penetrating the main beam, the middle of transmission shaft is connected with rotary drive mechanism 1, the rotary drive mechanism includes motor and speed reducer connected with motor, the output end of speed reducer is connected with transmission shaft by chain wheel and chain device 2, synchronous crank mechanism is arranged at the both ends of transmission shaft, the synchronous crank mechanism includes crank 8 arranged at the both ends of transmission shaft, the installation orientation of the crank at the both ends of transmission shaft is same, the crank is fixedly connected with transmission shaft, the other end of the crank is arranged with curved roller on the outside, the curved roller is composed of shaft 9 and bearing 10, the curved roller is configured with fixed lug 24 on lifting rod, the curved roller is located on the top of fixed lug, when curved roller is turned down to the lower side, fixed lug drives lifting rod to move down, left and right hinges are opened by left and right connecting rods, so that half furnace body is opened, when curved roller is turned up to the upper side, fixed lug drives lifting rod to move up, left and right hinges are closed by left and right connecting rods, and half furnace body is closed.

Claims

1. A device for opening and closing a PCVD deposition machine's holding furnace, characterized in that... The system includes a main beam with opening and closing connecting seats at both ends. Left and right hinges, connected to the furnace body, are hinged to both sides of the opening and closing connecting seats. The inner sides of the left and right hinges are hinged to a lifting rod installed in the upper middle section via connecting rods. A synchronous crank drive assembly is installed below the main beam, configured with the lifting rods at both ends of the main beam to drive the lifting rods up and down, causing the left and right hinges at both ends to open and close synchronously. The opening and closing connecting seat includes a connecting seat body, which is inverted T-shaped with an upwardly protruding boss at the upper middle section. The lower ends of the connecting seat body are symmetrically hinged to left and right hinges. The hinge has a lifting rod inserted through the middle of the connecting seat body. A fixed protrusion configured with the synchronous crank drive assembly is installed in the middle of the lifting rod. The lower end of the lifting rod passes through the connecting seat body and is hinged to the inner side of the left and right hinges through left and right connecting rods. The opening and closing connecting seat installed at both ends of the main beam has a fixed opening and closing connecting seat at one end and a movable opening and closing connecting seat at the other end. The movable opening and closing connecting seat has two protrusions on each side of the connecting seat body that are hinged to the two sides of the end of the main beam through two parallel connecting rods on each side, forming a parallelogram swing mechanism, which allows the connecting seat body to swing in parallel.

2. The PCVD deposition machine holding furnace opening and closing device according to claim 1, characterized in that... The synchronous crank drive assembly includes a drive shaft running longitudinally through the main beam installed below the main beam, with the middle of the drive shaft connected to a rotary drive mechanism, and synchronous crank mechanisms installed at both ends of the drive shaft.

3. The PCVD deposition machine holding furnace opening and closing device according to claim 1 or 2, characterized in that... The fixed opening and closing connecting seat has its body fixedly connected to one end of the main beam.

4. The PCVD deposition machine holding furnace opening and closing device according to claim 2, characterized in that... The synchronous crank mechanism includes cranks correspondingly installed at both ends of the drive shaft. The cranks are installed in the same orientation at both ends of the drive shaft. A crank roller is installed on the outer side of the other end of the crank, and the crank roller is configured with a fixed protrusion on the lifting rod.

5. The PCVD deposition machine tool holding furnace opening and closing device according to claim 4, characterized in that... The curved roller is located above the fixed protrusion. When the curved roller rotates downward, the fixed protrusion drives the lifting rod to move downward, and the left and right hinges are opened through the left and right connecting rods, so that the half of the furnace body is opened. When the curved roller rotates upward, the fixed protrusion drives the lifting rod to move upward, and the left and right hinges are retracted through the left and right connecting rods, so that the half of the furnace body is closed.

6. The PCVD deposition machine holding furnace opening and closing device according to claim 2, characterized in that... The rotary drive mechanism includes a motor and a reducer connected to the motor. The output end of the reducer is connected to the drive shaft via a sprocket and chain assembly.

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