CN215063608U

CN215063608U - Automatic opening and closing mechanism for furnace cover of pit furnace

Info

Publication number: CN215063608U
Application number: CN202121894067.6U
Authority: CN
Inventors: 盛永钢; 张天航; 张钰航; 赵志伟
Original assignee: Hebei Hehe Energy Technology Co ltd
Current assignee: Hebei Hehe Energy Technology Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-12-07
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses an automatic opening and closing mechanism for a furnace cover of a pit furnace, which comprises a furnace body and a furnace cover hermetically connected with an opening at the upper end of the furnace body, wherein a motor is arranged on the outer side wall of the lower part of the furnace body, and a rotating shaft of the motor is connected with a turbine screw rod which is vertically and upwards arranged through a coupling; the top end of a screw rod of the turbine screw rod is connected with an inverted L-shaped rotating shaft which conforms to the outer part of the furnace body, extends to the furnace cover and is fixedly connected with the furnace cover through a supporting bearing connected with a flange; the vertical body of rotation axis is gone up the key-type connection through vertical setting and is established the push rod that the rotation axis indulged on the body and keep off the ring, and hinged joint has electric putter on the lateral wall of push rod fender ring, electric putter's bottom hinged joint have perpendicular to furnace body setting and with the upper portion lateral wall fixed connection's of furnace body electric putter pillar. The utility model discloses not only can realize that the automation of bell lifts up and revolve from the fire door, can also can accurately reset when the bell needs to reset to cover tightly, and rotation rate is adjustable moreover, can satisfy the processing technology requirement.

Description

Automatic opening and closing mechanism for furnace cover of pit furnace

Technical Field

The utility model relates to a pit furnace technical field, concretely relates to automatic start/stop mechanism of pit furnace bell.

Background

The shaft furnace is widely applied to heat treatment procedures in various industries, and the opening and closing of the furnace cover to the furnace body are realized by the integral lifting and rotating of the furnace cover.

The existing opening mode of the furnace cover of the pit furnace generally adopts an electric push rod or a hydraulic cylinder to realize the lifting action of the furnace door, and then adopts the manual work to realize the rotation action, and the furnace cover needs to be reset and needs to be manually aligned with a furnace opening when being tightly covered. The opening and closing mode not only greatly increases the labor intensity of workers, but also can not ensure the process requirement for the pit furnace needing quick discharging by people to rotate the furnace cover. Therefore, can make the bell rise automatically, revolve from the burner and the bell need reset and can accurate when covering tightly, be the problem that this technical staff needs to solve urgently at present stage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an automatic opening and closing mechanism for a furnace cover of a pit furnace is provided, which not only can realize the automatic lifting and the rotation of the furnace cover from a furnace mouth, but also can accurately reset when the furnace cover needs to be reset and is tightly covered.

In order to solve the technical problem, the utility model adopts the following technical proposal.

An automatic opening and closing mechanism for a furnace cover of a pit furnace comprises a furnace body and the furnace cover which is hermetically connected to an opening at the upper end of the furnace body, wherein a motor is arranged on the outer side wall of the lower part of the furnace body, and a rotating shaft of the motor is connected with a turbine screw rod which is vertically and upwardly arranged through a coupling; the top end of a screw rod of the worm wheel screw rod is connected with an inverted L-shaped rotating shaft which conforms to the outer part of the furnace body, extends to the furnace cover and is fixedly connected with the furnace cover through a supporting bearing connected with a flange; a push rod baffle ring sleeved on the longitudinal body of the rotating shaft is connected to the longitudinal body of the rotating shaft through a key arranged longitudinally, an electric push rod is hinged to the outer side wall of the push rod baffle ring, and an electric push rod pillar which is perpendicular to the furnace body and is fixedly connected with the outer side wall of the upper part of the furnace body is hinged to the bottom end of the electric push rod; and the controlled ends of the motor and the electric push rod are connected with a PLC controller.

Preferably, the longitudinal body of the rotating shaft is sleeved with two guide bearings which are used for being matched with the support shaft bearing to realize axial positioning of the rotating shaft, and the two guide bearings are respectively positioned above and below the push rod baffle ring and fixedly connected with the furnace body.

Preferably, the upper side and the lower side of the push rod baffle ring are respectively sleeved with a sleeve which is clamped between the guide bearing and the push rod baffle ring, is in through connection with the key and is used for realizing axial positioning of the push rod baffle ring.

Preferably, an infrared distance measuring sensor used for monitoring the lifting distance of the furnace cover driven by the worm screw is fixed on a flange at the top end of the screw rod of the worm screw, and the output end of the infrared distance measuring sensor is connected with the input end of the PLC.

Preferably, the electric push rod is provided with a limit sensor for limiting the rotation angle of the furnace cover driven by the electric push rod, and the output end of the limit sensor is connected with the input end of the PLC controller.

Due to the adoption of the technical scheme, the utility model has the following technical progress.

The utility model can realize the lifting movement of the furnace cover through the arranged motor and the worm wheel screw rod, and can also utilize the self-locking characteristic of the worm wheel screw rod, avoid the risk of sudden falling of the furnace cover caused by the power failure of the motor, and is safe and reliable; the accurate positioning of the lifting motion of the furnace cover can be realized through the arranged external distance measuring sensor; through the electric putter and the push rod fender ring that set up, not only can realize the rotation of rotation axis, and then realize the rotation of bell, can also utilize spacing sensor on the electric putter for the resetting of bell is more accurate, alleviates workman intensity of labour, improves work efficiency, and simultaneously, electric putter's speed is adjustable, and is adaptable to satisfying the processing technology requirement.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a partial cross-sectional view of the present invention;

fig. 3 is a schematic structural diagram of the rotating assembly of the present invention.

Wherein: 1. the device comprises a motor, a coupler, a turbine screw rod, a furnace body, a furnace cover, a rotating shaft, a rotating assembly, an infrared distance measuring sensor, a guide bearing, a sleeve, a key, a supporting bearing, an electric push rod support, a push rod retaining ring and an electric push rod, wherein the shaft is 2, the turbine screw rod is 3, the furnace body is 4, the furnace cover is 5, the rotating shaft is 6, the rotating assembly is 7, the infrared distance measuring sensor is 8, the guide bearing is 9, the sleeve is 10, the key is 11, the supporting bearing is 12, the electric push rod support is 13, the push rod retaining ring is 14, and the electric push rod is 15.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

An automatic opening and closing mechanism for a furnace cover of a pit furnace is shown in a combined manner in figures 1-2 and comprises a furnace body 4, the furnace cover 5 and a PLC (programmable logic controller), wherein the furnace cover 5 is hermetically connected with an opening at the upper end of the furnace body 4; a rotating shaft 6 is arranged between the furnace body 4 and the furnace cover 5, a lifting component and a rotating component 7 are arranged on the furnace body 4, wherein the lifting component is used for driving the rotating shaft 6 to drive the furnace cover 5 to lift, and the rotating component 7 is used for driving the rotating shaft 6 to drive the furnace cover 5 to rotate; the PLC is used for controlling the lifting height of the furnace cover 5 and the rotating angle of the furnace cover 5.

The lifting assembly comprises a motor 1 and a turbine screw rod 3, wherein the motor 1 is arranged on the outer side wall of the lower part of the furnace body 4 through a first mounting plate fixed at the lower end of the furnace body 4; the outer side wall of the furnace body 4 is vertically upwards arranged on the turbine screw rod 3, the bottom end of the turbine screw rod 3 is connected with the rotating shaft of the motor 1 through the coupler 2, a flange is arranged at the top end of the screw rod in the turbine screw rod 3, and a supporting bearing 12 and an infrared distance measuring sensor 8 are connected to the flange.

The rotating shaft 6 is of an inverted L shape which is compliant with the external extension of the furnace body 4, the top end of the rotating shaft 6 is fixedly connected with the furnace cover 5, and the bottom end of the rotating shaft 6 is connected with the supporting bearing 12.

When the shaft type furnace is used, when a workpiece in the shaft type furnace needs to be discharged, the motor 1 rotates forwards and drives the turbine screw rod 3 to move through the coupler 2, so that the rotating motion of the motor 1 is converted into the up-and-down motion of the screw rod in the turbine screw rod 3; the flange at the top end of the screw rod in the turbine screw rod 3 is connected with a supporting bearing 12, the supporting bearing 12 plays a supporting role (axial fixation) for the rotating shaft 6, and the rotating shaft 6 is fixedly connected with the furnace cover 5, so that the lifting motion of the furnace cover 5 is realized. The ascending or descending distance of the furnace cover 5 can be realized through the infrared distance measuring sensor 8, the turbine screw rod 3 has the characteristic of self-locking, and the furnace cover 5 can be prevented from falling suddenly when the motor 1 is powered off, so that accidents are avoided.

As shown in fig. 3, the rotating assembly 7 comprises a push rod baffle ring 14, an electric push rod 15 and an electric push rod support 13, wherein the electric push rod support 13 is arranged perpendicular to the furnace body 4 through a second mounting plate fixed on the upper part of the furnace body 4 and is fixedly connected with the outer side wall of the upper part of the furnace body 4; the telescopic speed of the push rod of the electric push rod 15 is adjustable, a limit sensor is arranged on the electric push rod 15, and the bottom end of the electric push rod 15 is hinged with the open end of the electric push rod support 13; a key groove is longitudinally formed in the inner wall of the push rod baffle ring 14, the push rod baffle ring 14 is sleeved on the longitudinal body of the rotating shaft 6, and the outer side wall of the push rod baffle ring 14 is hinged to the end head of a push rod of the electric push rod 15.

A key 11 is longitudinally arranged on the longitudinal side wall of the rotating shaft 6, and the rotating shaft 6 is connected with a push rod baffle ring 14 through the key 11. When the furnace cover 5 rises to a required distance, the push rod of the electric push rod 15 extends outwards to start pushing the push rod baffle ring 14, and the rotation of the push rod baffle ring 14 is connected through the key 11 to realize the rotation of the rotating shaft 6, so as to drive the furnace cover 5 to rotate. The rotation axis 6 drives the rotatory angle of bell 5, and is injectd the flexible control of injecing of push rod to electric putter 15 through spacing sensor, and simultaneously, rotation axis 6 drives the rotation rate of bell 5, controls through the flexible speed of push rod of adjusting electric putter 15 to can satisfy the demand of the quick ejection of compact of pit furnace, and then guarantee the processing technology demand.

Two guide bearings 9 are sleeved on a longitudinal body of the rotating shaft 6, the two guide bearings 9 are respectively positioned above and below the push rod baffle ring 14 and fixedly connected with a second mounting plate on the upper part of the furnace body 4, and the guide bearings 9 are used for being matched with the supporting bearings 12 to realize the axial positioning of the rotating shaft 6.

The upper side and the lower side of the push rod baffle ring 14 are both sleeved with a sleeve 10, and the two sleeves 10 are respectively clamped between the guide bearing 9 and the push rod baffle ring 14. The inner side wall of the sleeve 10 is longitudinally provided with a key groove which is matched with the key 11. Because the rotating shaft 6 does not only move up and down but also rotate, in order to prevent the push rod baffle ring 14 from moving up and down along with the rotating shaft 6, the push rod baffle ring 14 and the key grooves of the two sleeves 10 need to be completely penetrated to be matched with the keys 11, so that the axial positioning of the push rod baffle ring 14 can be realized, and the push rod baffle ring 14 is prevented from moving up and down along with the rotating shaft 6.

The PLC controller is arranged on the furnace body 4, the output end of the infrared distance measuring sensor 8 is connected with the input end of the PLC controller, and the controlled end of the motor 1 is connected with the output end of the PLC controller, so that the distance for driving the turbine screw rod 3 to drive the furnace cover 5 to lift by the motor 1 is controlled according to the distance monitored by the infrared distance measuring sensor 8; the output end of the limit sensor is connected with the input end of the PLC, and the controlled end of the electric push rod 15 is connected with the output end of the PLC, so that the electric push rod 15 is limited to drive the rotating shaft 6 to drive the furnace cover 5 to rotate and control the rotating speed.

When the utility model is used, the motor 1 drives the turbine screw rod 3 to move through the shaft coupling 2, the screw rod of the turbine screw rod 3 stretches and retracts to drive the rotating shaft 6 to move up and down, the rotating shaft 6 is fixedly connected with the furnace cover 5, and the lifting motion of the furnace cover 5 is realized; the electric push rod 15 pushes the push rod baffle ring 14, the rotation of the push rod baffle ring 14 is connected through the key 11 to realize the rotation of the rotating shaft 6, and then the rotation of the furnace cover 5 is driven, and the rotation speed of the furnace cover 5 is adjusted through the electric push rod 15 to meet the requirements of a processing technology.

Claims

1. The utility model provides a pit furnace bell automatic start/stop mechanism, includes furnace body (4) and sealing connection bell (5) on furnace body (4) upper end opening, its characterized in that: a motor (1) is arranged on the outer side wall of the lower part of the furnace body (4), and a rotating shaft of the motor (1) is connected with a turbine screw rod (3) which is vertically and upwardly arranged through a coupling (2); the top end of the screw rod of the turbine screw rod (3) is connected with an inverted L-shaped rotating shaft (6) which conforms to the outer part of the furnace body (4), extends to the furnace cover (5) and is fixedly connected with the furnace cover (5) through a supporting bearing (12) connected with a flange; a push rod baffle ring (14) sleeved on the longitudinal body of the rotating shaft (6) is connected to the longitudinal body of the rotating shaft (6) through a longitudinally arranged key (11), an electric push rod (15) is hinged to the outer side wall of the push rod baffle ring (14), and an electric push rod support column (13) which is perpendicular to the furnace body (4) and is fixedly connected with the outer side wall of the upper part of the furnace body (4) is hinged to the bottom end of the electric push rod (15); the controlled ends of the motor (1) and the electric push rod (15) are connected with a PLC controller.

2. The automatic opening and closing mechanism for the furnace cover of the pit furnace as claimed in claim 1, wherein: the vertical body of rotation axis (6) is overlapped and is equipped with two and is used for realizing rotation axis (6) axial positioning's guide bearing (9) with support bearing (12) cooperation, and two guide bearing (9) are located the top and the below of push rod fender ring (14) respectively and with furnace body (4) fixed connection.

3. The automatic opening and closing mechanism for the furnace cover of the pit furnace as claimed in claim 2, wherein: the upper side and the lower side of the push rod baffle ring (14) are respectively sleeved with a sleeve (10) which is clamped between the guide bearing (9) and the push rod baffle ring (14), is in through connection with the key (11) and is used for realizing the axial positioning of the push rod baffle ring (14).

4. The automatic opening and closing mechanism for the furnace cover of the pit furnace as claimed in claim 1, wherein: and an infrared distance measuring sensor (8) used for monitoring the lifting distance of the turbine screw (3) driving furnace cover (5) is fixed on a screw top end flange of the turbine screw (3), and the output end of the infrared distance measuring sensor (8) is connected with the input end of the PLC.

5. The automatic opening and closing mechanism for the furnace cover of the pit furnace as claimed in claim 1, wherein: the electric push rod (15) is provided with a limit sensor used for limiting the rotation angle of the electric push rod (15) driving the furnace cover (5), and the output end of the limit sensor is connected with the input end of the PLC.