CN101775950A - Double spiral insulation door - Google Patents

Abstract

The invention relates to a double-helix isolation door applied to a boiler.A vertical screw rod is arranged in the middle of a door frame, a lifting nut and a compression nut matched with the screw rod are sleeved on the screw rod, the lifting nut is positioned below the compression nut, a connecting hole is formed in the lifting nut, a connecting bolt is inserted in the connecting hole and can freely move, and the connecting bolt is connected with the compression nut after penetrating through a bolt hole; the door plate is hung on the lifting nut, the lower end of the screw rod is a polished rod, and a positioning sleeve capable of hanging the lifting nut is arranged on the polished rod; the sliding locking frame is connected with the door plate to form an integral structure and has a certain differential motion; the sliding locking frame is connected with the compression nut and moves synchronously, the front surface of the sliding locking frame is provided with a locking wedge block, the front of the lower part of the doorframe is provided with a sealing steel plate component, and the sliding locking frame is gradually compressed when the locking wedge block goes downwards. The invention has the advantages of ingenious and reasonable structure, simple electric circuit, high working efficiency, easy operation and control, convenient maintenance and good sealing effect.

Description

Double spiral insulation door

technical field

The invention relates to an auxiliary device on a boiler, in particular to a double-screw insulating door used in the cold and hot air duct system on the boiler.

Background technique

The isolation door is an important auxiliary equipment on the boiler, and it is mainly used in occasions that need to be shut off and isolated in the upper cold and hot air duct system of the boiler. The current electric isolation door has a door frame, a door panel, two sets of electric actuators, a sealing locking mechanism, and an electrical control cabinet. There are cams, connecting rods and other parts in the sealing mechanism, and the pressing points of the cams are generally distributed on both sides of the door panel (upper and lower sides or left and right sides). The other two sides rely on the rigidity of the door panel to pressurize the seal material. When closing the door, a group of electric actuators drives the door panel to move and close, and stops when it reaches the closed position; another group of electric actuators drives the sealing locking device to lock the seal, and stops when the seal reaches the sealing position. When opening, the latter group of electric actuators also loosen the sealing and locking device first, and then stop after loosening the seal; then the front group of electric actuators lifts the door panel up and down, so that the door panel can be opened. The mechanical structure and electrical circuit of such equipment are relatively complicated, and the sealing points are unevenly distributed, easy to leak, and the sealing effect is not very satisfactory.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a double-helix isolation door with ingenious and reasonable structure, simple electrical circuit, high work efficiency, easy manipulation, convenient maintenance and good sealing effect.

According to the technical solution provided by the present invention, the double-helix insulation door includes a door frame and a door panel. The door panel is arranged in the door frame, and the door panel can move up and down in the door frame. Guide grooves are formed between the strip guide plates; its feature is that a vertical screw rod is installed in the middle of the door frame, and a lifting nut and a compression nut matched with it are set on the screw rod, the lifting nut is located under the compression nut, and the lifting nut There is a connection hole on the top, and the connection bolt is inserted in the connection hole and can move freely. The connection bolt passes through the bolt hole and is connected with the compression nut; the door panel is hung on the lifting nut through the hinge plate, and the lower end of the screw rod is a polished rod. The positioning sleeve that can hang the lifting nut is installed; the sliding locking frame is connected with the door panel as an integral structure and has a certain differential; the sliding locking frame is connected with the compression nut and moves synchronously, on the front surface of the sliding locking frame A locking wedge is provided, and a sealing steel plate member is installed in front of the lower part of the door frame, and the locking wedge gradually compresses the sliding locking frame when it goes down.

As a further improvement of the present invention, a sliding groove is installed on the door panel, and the sliding locking frame is assembled in the sliding groove and can slide vertically relative to each other.

As a further improvement of the present invention, depth-adjustable pressure adjustment bolts are installed on the rear surface of the sealing steel plate member. The adjustment bolts correspond one by one, and the locking wedge gradually presses the adjustment bolts when it goes down.

As a further improvement of the present invention, the upper end of the screw rod is installed in the upper bearing seat on the upper frame of the door frame through a bearing, and the lower end of the screw rod is installed in the lower bushing on the horizontal frame in the middle of the door frame.

As a further improvement of the present invention, rollers are installed on both sides of the door panel.

As a further improvement of the present invention, the door frame is provided with reinforcing ribs.

As a further improvement of the present invention, a peep hole is opened on the sealing steel plate member.

As a further improvement of the present invention, a sealing ring is provided on the rear surface of the door panel.

Compared with the prior art, the present invention has the advantages that: the structure is ingenious and reasonable, and only one set of electric deceleration device is used to complete the opening, closing, sealing and locking and releasing functions of the door panel, which reduces the use cost; the electrical circuit is simple, and the door is isolated Quick opening and closing, high work efficiency, easy operation and control, and convenient maintenance and repair; the sealing and locking pressure points are evenly distributed and the locking pressure is adjustable, which effectively improves the sealing performance and prolongs the service life of the isolation door.

Description of drawings

Fig. 1 is a schematic diagram of the door panel in the open state in the present invention.

Fig. 2 is a schematic diagram of the closed state of the door panel in the present invention.

FIG. 3 is a partial side sectional view of FIG. 2 .

FIG. 4 is an enlarged schematic diagram of part A in FIG. 2 .

Explanation of reference signs: 1-door frame, 2-door panel, 3-upper bearing seat, 4-screw rod, 5-connecting bolt, 6-lifting nut, 7-compression rod, 8-compression nut, 9-hinge plate , 10-sliding locking frame, 11-guide plate, 12-locking wedge, 13-sliding groove, 14-roller, 15-positioning sleeve, 16-horizontal frame, 17-lower bushing, 18-sealed steel plate member , 19-pressure adjustment bolt, 20-peep hole, 21-fixed sealing plate, 22-sealing ring, 23-guide groove, 24-reinforcing rib.

Detailed ways

The present invention will be further described below in conjunction with specific drawings and embodiments.

As shown in the figure, the present invention mainly consists of a door frame 1, a door panel 2, an upper bearing seat 3, a screw rod 4, a connecting bolt 5, a compression nut 6, a compression rod 7, a lifting nut 8, a hinge plate 9, and a sliding locking frame. 10. Guide strip 11, locking wedge 12, sliding groove 13, roller 14, positioning sleeve 15, horizontal frame 16, lower shaft sleeve 17, sealing steel plate member 18, pressure adjusting bolt 19, sealing ring 21, fixed sealing plate 22 and other components.

As shown in Figures 1 to 4, the door panel 2 is arranged in the door frame 1, and the door panel 2 can move up and down in the door frame 1. Two guide plates 11 are respectively installed on the inner side of the upper part of the two side frames of the door frame 1, and the two guide plates 11 A guide groove 23 is formed between them; a vertical screw rod 4 is installed in the middle of the door frame 1, the upper end of the screw rod 4 is installed in the upper bearing seat 3 on the upper frame of the door frame 1 through a bearing, and the lower end of the screw rod 4 is installed in the horizontal position of the middle part of the door frame 1. In the lower shaft sleeve 17 on the frame 16; the screw rod 4 is set with a lifting nut 6 and a compression nut 8 matched with it, the lifting nut 6 is located below the compression nut 8, and a connecting hole is provided on the lifting nut 6, and the connecting bolt 5 is interspersed in the connection hole and can move freely, and the connection bolt 5 is connected with the compression nut 6 after passing through the bolt hole; the door panel 2 is hung on the lifting nut 6 through the hinge plate 9, and the lower end of the screw rod 4 is a polished rod, and the polished rod A positioning sleeve 15 is fastened on the top by bolts, and the positioning sleeve 15 can hang the lifting nut 6; a sliding groove 13 is installed on the door panel 2, and the sliding locking frame 10 is assembled in the sliding groove 13 and can slide vertically relative to each other. The sliding locking frame 10 is connected with the door panel 1 as an integral structure and has a certain differential; A locking wedge 12 is arranged on the top; a sealing steel plate member 18 is installed on the front of the lower part of the door frame 1, and a pressure adjusting bolt 19 with adjustable depth is installed on the rear surface of the sealing steel plate member 18, and the pressure adjusting bolt 19 is on the sealing steel plate member. 18 is evenly distributed on the circumference, and the locking wedges 12 on the sliding locking frame 10 correspond to the pressure adjusting bolts 19 one by one, and the locking wedges 12 gradually compress the pressure adjusting bolts 19 on the sliding locking frame 10 when descending.

As shown in Figures 1 to 3, rollers 14 are installed on both sides of the door panel 2, and the rollers 14 can reduce the frictional resistance of the door panel 2 when moving up and down in the guide groove 23, so as to reduce the operating load of the motor reducer . The door frame 1 is provided with reinforcing ribs 24, which can enhance the strength of the door frame 1 and improve the safety performance of the present invention.

As shown in Fig. 1～Fig. 3, working process and working principle of the present invention are as follows:

When the isolation door is closed, the screw rod 4 is driven to rotate by the motor reducer (not shown in the figure). When the screw rod 4 rotates, the lifting nut 8 and the compression nut 6 are driven downward through thread transmission. When the lifting nut 8 goes down to the polished rod part , the lifting nut 8 disengages from the screw rod 4 and hangs on the positioning sleeve 15, the door panel 2 is thus hung on the lifting nut 8 and is opposite to the isolated door, and the door panel 2 stops moving downward; when the lifting nut 8 and the wire When the rod 4 is disengaged, the compression nut 6 is still engaged with the screw rod 4, the screw rod 4 continues to rotate and drives the compression nut 6 to continue downward, and the compression nut 6 pushes the sliding locking frame 10 downward through the compression rod 7, As the sliding locking frame 10 goes down, the locking wedge 12 installed on it gradually presses the pressure adjusting bolt 19 on the rear surface of the sealing steel plate member 18, and under the reaction force of the pressure adjusting bolt 19, the door panel 2 moves backward. Move, be provided with sealing ring 22 on the rear surface of door panel 2, when door panel 2 moves backward, sealing ring 22 on it is pressed on the fixed sealing plate 21 that isolates the edge of the doorway, thereby the isolation door is sealed. The size of the isolation door sealing force can be directly controlled by adjusting the depth of the pressure adjustment bolt 19 and the descending distance of the sliding locking frame 10, which is easy to adjust in one go. A peep hole 20 is opened on the sealing steel plate member 18, through which the degree of adjustment of the pressure adjustment bolt 19 can be observed, so that the seal adjustment can be more easily achieved to an ideal state.

When the isolation door is opened, the motor reducer runs in reverse and drives the screw rod 4 to rotate in the reverse direction. The screw rod 4 first drives the compression nut 6 to go up, and the compression rod 7 and the connecting bolt 5 connected to the compression nut 6 follow the pressure. The tightening nut 6 goes up synchronously, and when the pressing rod 6 goes up, it drives the sliding locking frame 10 to go up together, and the locking wedge 12 and the pressure adjusting bolt 19 are gradually out of contact, the seal is loosened, and the door panel 2 returns to its original position; when the connecting bolt 5, when it goes up to the predetermined position, the connecting bolt 5 pulls the lifting nut 8 to go up, and the lifting nut 8 and the screw rod 4 are normally engaged again. When the position is corrected, the door panel 2 and the sliding locking frame 3 rise to the normal opening position, thereby completing a process of isolating the door switch.

Claims (8)

1. The double-helix insulation door includes a door frame (1) and a door panel (2). The door panel (2) is set inside the door frame (1), and the door panel (2) can move up and down inside the door frame (1). Two guide plates (11) are respectively installed on the upper inner side of the side frame, and guide grooves (23) are formed between the two guide plates (11); it is characterized in that a vertical screw rod (1) is installed in the middle of the door frame (1). 4), the lifting nut (6) and the compression nut (8) matched with it are set on the screw mandrel (4), the lifting nut (6) is located under the compression nut (8), and the lifting nut (6) is provided with Connection hole, the connection bolt (5) is inserted in the connection hole and can move freely, the connection bolt (5) is connected with the compression nut (6) after passing through the bolt hole; the door panel (2) is hung on the hinge plate (9) On the lifting nut (6), the lower end of the screw rod (4) is a polished rod, and a positioning sleeve (15) capable of hanging the lifting nut (6) is installed on the polished rod; the sliding locking frame (10) is connected with the door panel (1) as a whole type structure and has a certain differential; the sliding locking frame (10) is connected with the compression nut (8) and moves synchronously, and a locking wedge (12) is arranged on the front surface of the sliding locking frame (10). The bottom front of the door frame (1) is equipped with a sealing steel plate member (18), and the locking wedge (12) gradually compresses the sliding locking frame (10) when it descends. 2. The double-helix insulation door according to claim 1, further characterized in that a sliding groove (13) is installed on the door panel (2), and the sliding locking frame (10) is assembled in the sliding groove (13) and Can slide vertically relative to each other. 3. The double-screw insulation door according to claim 1, further characterized in that, a depth-adjustable pressure adjustment bolt (19) is installed on the rear surface of the sealed steel plate member (18), and the pressure adjustment bolt (19) Evenly distributed on the circumference of the sealed steel plate member (18), the locking wedges (12) on the sliding locking frame (10) correspond to the pressure adjustment bolts (19) one by one, and the locking wedges (12) gradually press down when they go down. Adjustment bolt (19). 4. The double-helix insulation door according to claim 1, further characterized in that, the upper end of the screw rod (4) is installed in the upper bearing seat (3) on the upper frame of the door frame (1) through bearings, and the screw rod (4) 4) the lower end is installed in the lower bushing (17) on the horizontal frame (16) in the middle of the door frame (1). 5. The double-screw insulation door according to claim 1, further characterized in that rollers (14) are installed on both sides of the door panel (2). 6. The double-screw insulation door according to claim 1, further characterized in that, the door frame (1) is provided with reinforcing ribs (24). 7. The double-chain insulation door according to claim 1, further characterized in that a peep hole (20) is opened on the sealing steel plate member (18). 8. The double-chain insulation door according to claim 1, further characterized in that a sealing ring (22) is provided on the rear surface of the door panel (2).

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