Mechanical trackless drive curve sliding translation access door for a control room

Abstract

The present application relates to the technical fields of operating room door, in particular to a mechanical trackless transmission curve sliding translation maintenance door of operating room, comprising a door frame, which is provided with a fixed frame, which forms a semi-closed chamber with the door frame, and a detector for detecting gas pressure is arranged in the chamber; further comprising a door body, which comprises a first door panel, a second door panel and a third door panel connected in sequence. The mechanical trackless transmission curve sliding translation maintenance door of operating room provided by the present application, the wedge block pushes the door body to move to the inside of the door frame and fits with the fixed frame, the semi-closed chamber formed by the fixed frame and the door frame is closed, and the air in the chamber wall is extruded, so that the internal gas pressure of the chamber is increased, at this time the detector of model 61302 atmospheric pressure sensor detects the gas pressure in the chamber and outputs an electric signal, which is convenient for the staff to check the sealing state of the door, when the internal gas pressure of the chamber is reduced, the detector outputs an electric signal to remind the staff that the sealing state of the door is not good, which is convenient for the staff to handle in time.

Description

Technical Field

[0001] This invention relates to the field of control room door technology, and more specifically to a mechanical trackless transmission curved sliding maintenance door for control rooms. Background Technology

[0002] The control room is an important component of a highly automated factory, where staff centrally control the factory's automated operations.

[0003] According to the publication (announcement) number CN104317238B, published (announcement) date 2017.01.11, an automated control system for a 10kV switchgear and a transfer vehicle is disclosed, including a switchgear, a switch trolley, a clamping device for the switch trolley, a transfer vehicle, a transfer vehicle conveyor belt, a robotic arm, a robotic arm platform vehicle, a robotic arm platform vehicle conveyor belt, a positioning rod, and a proximity switch. The switch trolley is installed inside the switchgear by means of the clamping device for the switch trolley. The transfer vehicle conveyor belt is installed parallel to the switchgear on one side of the switchgear door at a certain distance from the switchgear. Multiple transfer vehicles are slidably installed on the transfer vehicle conveyor belt. The robotic arm platform vehicle conveyor belt is installed parallel to the transfer vehicle conveyor belt on the outside of the transfer vehicle conveyor belt at a certain distance from the transfer vehicle conveyor belt. A robotic arm platform vehicle is slidably installed on the robotic arm platform vehicle conveyor belt. A robotic arm is installed on the robotic arm platform. This system utilizes sensor technology and programmable logic controller (PLC) technology to control various types of motors driving equipment. Proximity switches or limit switches installed at various locations detect whether the action is completed. Actions are selected via a touchscreen, and the completion status is displayed on the touchscreen to ensure the normal and reliable operation of the equipment. The logical relationships between the devices are implemented by the program.

[0004] In the prior art, including the aforementioned patents, the control equipment inside the control room is highly sophisticated, and the working environment required is quite demanding. Therefore, the control room is needed to isolate the equipment and create a suitable working environment to ensure its normal operation. Since operators need to work inside the control room, a door is required for their movement. This door must also be able to seal the control room, such as a sliding door, to prevent external influences on the internal environment. Existing doors can achieve a sealing effect, but opening, closing, and moving these doors require considerable space. Since control rooms are typically located at the end of a corridor, and the door is roughly the same width as the corridor, the movement of the door is restricted. Conventional doors cannot meet the sealing requirements of the control room, and the door's sealing performance cannot be tested. Summary of the Invention

[0005] The purpose of this invention is to provide a mechanical trackless transmission curved sliding maintenance door for the control room, which aims to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides a mechanical trackless transmission curved sliding maintenance door for an operator's cab, comprising a door frame on which: A fixed frame, together with the door frame, forms a semi-enclosed chamber, and a detector for detecting gas pressure is installed inside the chamber; Multiple wedges; It also includes a door body, which comprises a first door panel, a second door panel, and a third door panel connected in sequence. The first door panel is movably mounted on the door frame. The door body is assembled for the following two states: In the first state, the first door panel, the second door panel, and the third door panel are folded so that the first door panel fits against the side of the door frame; In the second state, the first door panel, the second door panel, and the third door panel are on the same plane, and the wedge moves to push the door body against the fixed frame and squeeze the air inside the cavity.

[0007] Preferably, the first door panel, the second door panel, and the third door panel are all provided with protrusions that are adapted to the fixing frame, and the protrusions can be moved to fit into the fixing frame.

[0008] Preferably, both the first door panel and the third door panel are provided with inserts extending into the interior of the second door panel, and the first door panel, the second door panel, and the third door panel are separated so that any two can rotate relative to each other.

[0009] Preferably, the second door panel is provided with a shaft, and the insert block is provided with a waist-shaped groove that matches the shaft.

[0010] Preferably, the door frame is provided with a guide slope, and the wedge moves to push the door body along the guide slope so that the first door panel, the second door panel and the third door panel are fitted together in sequence.

[0011] Preferably, the door frame is provided with a guide groove for guiding the movement of the third door panel, the guide groove including a straight groove and an inclined groove parallel to the guide slope.

[0012] Preferably, the door frame is provided with a sealing frame consisting of horizontal and vertical movable strips, and the door body is fitted with the fixed frame so that the horizontal and vertical movable strips are brought together and span the door frame and the door body.

[0013] Preferably, the horizontal movable strip is symmetrically provided with inclined tenons, and the vertical movable strip is provided with tenons that are adapted to the tenons. One of the horizontal movable strips moves to drive the sealing frame to retract or expand.

[0014] Preferably, the door frame is provided with a connecting pipe communicating with the chamber, and one of the horizontal movable bars is provided with a piston extending into the interior of the connecting pipe.

[0015] Preferably, a take-up reel is provided on the door frame, and a traction rope is provided between the take-up reel and the plurality of wedges. A second gear for driving the first door panel to rotate is provided on the take-up reel.

[0016] In the above technical solution, the mechanical trackless transmission curved sliding maintenance door for the control room provided by the present invention has the following beneficial effects: When opening the door, the first door panel rotates relative to the door frame to drive the second and third door panels, causing the first, second, and third door panels to fold. The first door panel fits against the side of the door frame, and the door body does not exceed the range of the door frame after folding. The space occupied by the opened door body is very small, which can adapt to the narrow corridor corresponding to the door frame of the control room; When closing the door, the first door panel rotates to drive the second and third door panels to fold. When the door panels move, the first, second, and third door panels are on the same plane. The wedge pushes the first, second, and third door panels inward into the door frame and into contact with the fixed frame, sealing the semi-enclosed chamber formed by the fixed frame and the door frame. This also compresses the air inside the chamber, causing the internal air pressure to rise. At this time, the detector detects the internal air pressure and outputs an electrical signal, allowing staff to check the door's sealing status. When the internal air pressure drops, the detector outputs an electrical signal to alert staff that the door's sealing status is poor, allowing staff to take timely action. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the outer structure of the door frame provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the inner structure of the door frame provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of a door frame provided in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the internal structure of the connecting pipe provided in an embodiment of the present invention; Figure 6 for Figure 5 Enlarged view at point B in the middle; Figure 7 for Figure 5 Enlarged view at point C; Figure 8 This is a schematic diagram of the structure of the take-up reel provided in an embodiment of the present invention; Figure 9 for Figure 8 Enlarged view at point D; Figure 10 This is a schematic diagram of the door's folding structure provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the door's unfolded structure provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the fixing frame provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the second door panel provided in an embodiment of the present invention; Figure 14 This is a structural schematic diagram of the first door panel provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Door frame; 11. Sealing frame; 111. Horizontal moving strip; 112. Vertical moving strip; 113. Tenon; 114. Mortise; 115. Piston; 116. Connecting pipe; 117. Sealing plate; 118. Protrusion; 119. Connecting rod; 12. Moving plate; 121. Wedge; 122. Beveled part; 123. Vertical part; 124. Traction rope; 125. Reel; 126. Paddle; 127. Support rod; 13. Detector; 131. Fixed frame; 132. Rubber strip; 133. Guide groove; 134. Straight groove; 135. Beveled groove; 136. Guide slope; 21. First door panel; 22. Second door panel; 23. Third door panel; 24. First gear; 25. Sealing strip; 251. Protrusion; 26. Insert block; 27. Tenon rod; 28. Shaft rod; 29. ​​Second gear. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-14 As shown, a mechanical trackless sliding maintenance door for an operator's cab includes a door frame 1, on which are provided: The fixed frame 131, together with the door frame 1, forms a semi-enclosed chamber, and a detector 13 for detecting gas pressure is installed in the chamber; Multiple wedges 121; It also includes a door body, which comprises a first door panel 21, a second door panel 22, and a third door panel 23 connected in sequence. The first door panel 21 is movably mounted on the door frame 1. The door body is assembled for the following two states: In the first state, the first door panel 21, the second door panel 22 and the third door panel 23 are folded so that the first door panel 21 fits against the side of the door frame 1; In the second state, the first door panel 21, the second door panel 22, and the third door panel 23 are on the same plane, and the wedge block 121 moves to push the door body into the fixed frame 131 and squeeze the air inside the cavity.

[0022] Specifically, detector 13 is a 61302 type atmospheric pressure sensor.

[0023] Furthermore, when the door is opened, the first door panel 21 rotates relative to the door frame 1 to drive the second door panel 22 and the third door panel 23, causing the first door panel 21, the second door panel 22, and the third door panel 23 to fold. The first door panel 21 fits against the side of the door frame 1, and the door does not exceed the range of the door frame 1 after folding. The open door occupies very little space, which can adapt to the narrow corridor corresponding to the door frame 1 of the control room. When the door is closed, the first door panel 21 rotates to drive the second door panel 22 and the third door panel 23 to move. With the plates 23 on the same plane, the wedge 121 pushes the first door plate 21, the second door plate 22, and the third door plate 23 to move into the door frame 1 and fit against the fixed frame 131, sealing the semi-enclosed chamber formed by the fixed frame 131 and the door frame 1, and compressing the air inside the chamber wall, causing the air pressure inside the chamber to rise. At this time, the detector 13 detects the air pressure inside the chamber and outputs an electrical signal, which makes it convenient for staff to check the airtightness of the door. When the air pressure inside the chamber drops, the detector 13 outputs an electrical signal to remind the staff that the airtightness of the door is not good, which makes it convenient for the staff to deal with it in time.

[0024] In the above technical solution, when the door is opened, the first door panel 21 rotates relative to the door frame 1 to drive the second door panel 22 and the third door panel 23, causing the first door panel 21, the second door panel 22, and the third door panel 23 to fold. The first door panel 21 fits against the side of the door frame 1, and the door does not exceed the range of the door frame 1 after folding. The space occupied by the opened door is very small, which can adapt to the narrow corridor corresponding to the door frame 1 of the control room. When the door is closed, the first door panel 21 rotates to drive the second door panel 22 and the third door panel 23 to move. With door panels 23 on the same plane, wedge 121 pushes the first door panel 21, the second door panel 22, and the third door panel 23 into the door frame 1 and into contact with the fixed frame 131, sealing the semi-enclosed chamber formed by the fixed frame 131 and the door frame 1, and compressing the air inside the chamber, causing the air pressure inside the chamber to rise. At this time, detector 13 detects the air pressure inside the chamber and outputs an electrical signal, which makes it convenient for staff to check the airtightness of the door. When the air pressure inside the chamber drops, detector 13 outputs an electrical signal to remind staff that the airtightness of the door is not good, which makes it convenient for staff to deal with it in time.

[0025] As a further embodiment of the present invention, the first door panel 21, the second door panel 22 and the third door panel 23 are all provided with protrusions adapted to the fixing frame 131, and the protrusions move to embed into the fixing frame 131.

[0026] Specifically, a rubber strip 132 is provided on the fixed frame 131, and a self-springing telescopic rod for pushing the main body is provided inside the fixed frame 131. The first door panel 21, the second door panel 22 and the third door panel 23 are all provided with protrusions 251 embedded in the cavity.

[0027] Furthermore, when the first door panel 21, the second door panel 22, and the third door panel 23 are on the same plane, the wedge block 121 moves and pushes the first door panel 21, the second door panel 22, and the third door panel 23 toward the fixed frame 131. The protrusion is embedded in the fixed frame 131, and the protrusion 251 is embedded in the cavity between the fixed frame 131 and the door frame 1, and squeezes the air in the cavity. At the same time, the self-springing telescopic rod is compressed.

[0028] As a further embodiment of the present invention, both the first door panel 21 and the third door panel 23 are provided with inserts 26 extending into the interior of the second door panel 22. The first door panel 21, the second door panel 22, and the third door panel 23 are separated so that any two can rotate relative to each other.

[0029] Specifically, the insert 26 connects the first door panel 21 and the second door panel 22, as well as the second door panel 22 and the third door panel 23. When the first door panel 21, the second door panel 22 and the third door panel 23 are separated, a gap appears between the first door panel 21 and the second door panel 22 and they are connected by the insert 26, and a gap appears between the second door panel 22 and the third door panel 23 and they are connected by the insert 26. At this time, the first door panel 21 can rotate relative to the second door panel 22, and the second door panel 22 can rotate relative to the third door panel 23, which facilitates the folding of the first door panel 21, the second door panel 22 and the third door panel 23.

[0030] As another embodiment of the present invention, a shaft 28 is provided on the second door panel 22, and a waist-shaped groove adapted to the shaft 28 is provided on the insert block 26.

[0031] Specifically, when the first door panel 21, the second door panel 22, and the third door panel 23 move relative to each other on the same plane, the shaft 28 moves in the waist-shaped groove on the insert block 26, thereby keeping the first door panel 21, the second door panel 22, and the third door panel 23 connected.

[0032] As another embodiment of the present invention, a guide slope 136 is provided on the door frame 1, and the wedge block 121 moves to push the door body along the guide slope 136 so that the first door panel 21, the second door panel 22 and the third door panel 23 are fitted in sequence.

[0033] Specifically, sealing strips 25 are provided on the first door panel 21 and the third door panel 23, and grooves that are adapted to the sealing strips 25 are provided on the side walls of the second door panel 22 on opposite sides.

[0034] Furthermore, after the first door panel 21, the second door panel 22, and the third door panel 23 are on the same plane, the wedge block 121 moves to push the first door panel 21, the second door panel 22, and the third door panel 23 into the door frame 1. The third door panel 23 moves along the guide slope 136, which pushes the distance between the third door panel 23 and the first door panel 21 to decrease. The sealing strips 25 on the first door panel 21 and the third door panel 23 are embedded in the grooves on the second door panel 22. The sealing strips 25 seal the gaps between the first door panel 21 and the second door panel 22 and the gaps between the third door panel 23 and the second door panel 22, further improving the sealing performance of the door.

[0035] As another embodiment of the present invention, the door frame 1 is provided with a guide groove 133 for guiding the movement of the third door panel 23. The guide groove 133 includes a straight groove 134 and an inclined groove 135 parallel to the guide slope 136.

[0036] Specifically, the third door panel 23 is provided with a tenon 27 that is compatible with the guide groove 133.

[0037] Furthermore, during the rotation of the first door panel 21 relative to the door frame 1, the first door panel 21 drives the second door panel 22 to move through the shaft 28 and the insert 26. The second door panel 22 drives the third door panel 23 to move through the shaft 28 and the insert 26. The third door panel 23 moves under the constraint of the tenon 27 and the guide groove 133, so that the third door panel 23 moves closer to the first door panel 21, thereby making the door close without exceeding the range of the door frame 1, which facilitates the entry and exit of staff.

[0038] As another embodiment of the present invention, a sealing frame 11 composed of a horizontal movable strip 111 and a vertical movable strip 112 is provided on the door frame 1. The door body is fitted with the fixed frame 131 so that the horizontal movable strip 111 and the vertical movable strip 112 are gathered together and span the door frame 1 and the door body.

[0039] Specifically, the door body has a groove that matches the sealing frame 11, and there are two horizontal movable bars 111 and two vertical movable bars 112.

[0040] Furthermore, after the door body comes into contact with the fixed frame 131, the horizontal movable strip 111 and the vertical movable strip 112 that make up the sealing frame 11 move, the sealing frame 11 closes, and the horizontal movable strip 111 and the vertical movable strip 112 cross the door body and the door frame 1, further sealing the gap between the door body and the door frame 1 and improving the sealing performance of the door body.

[0041] As another embodiment of the present invention, the horizontal movable strip 111 is symmetrically provided with inclined tenon grooves 114, and the vertical movable strip 112 is provided with tenon blocks 113 adapted to the tenon grooves 114. One of the horizontal movable strips 111 moves to drive the sealing frame 11 to retract or expand.

[0042] Specifically, when the horizontal movable strip 111 moves toward the center of the door frame 1, the inclined tenon 114 on the horizontal movable strip 111 pushes the tenon 113 on the vertical movable strip 112 to move, thereby causing the vertical movable strip 112 to move closer to the center of the door frame 1. The tenon 113 on the vertical movable strip 112 then moves along the tenon 114 on another horizontal movable strip 111, thereby causing the horizontal movable strip 111 to also move closer to the center of the door frame 1.

[0043] As another embodiment of the present invention, a connecting pipe 116 communicating with the chamber is provided on the door frame 1, and a piston 115 extending into the interior of the connecting pipe 116 is provided on one of the horizontal movable bars 111.

[0044] Specifically, the connecting pipe 116 is U-shaped, and a connecting rod 119 is provided between the connecting pipe 116 and the piston 115. The connecting rod 119 is a self-springing telescopic rod.

[0045] Furthermore, when the gas in the chamber is pressurized, the gas moves into the connecting pipe 116 and pushes the piston 115 and the horizontal movable bar 111 to move. The connecting rod 119 between the piston 115 and the connecting pipe 116 is stretched and accumulates elastic potential energy.

[0046] As a further embodiment of the present invention, a take-up reel 125 is provided on the door frame 1, and a traction rope 124 is provided between the take-up reel 125 and a plurality of wedges 121. A second gear 29 for driving the first door panel 21 to rotate is provided on the take-up reel 125.

[0047] Specifically, a motor is installed inside the door frame 1, and a take-up reel 125 and a second gear 29 are installed on the output end of the motor. A movable plate 12 is symmetrically arranged inside the door frame 1. A tenon block 113 is fixedly installed on the movable plate 12. A traction rope 124 is installed between the take-up reel 125 and the movable plate 12. A spring is installed between the movable plate 12 and the door frame 1. A first gear 24 that meshes with the second gear 29 is installed on the first door plate 21. The second gear 29 has a toothless portion. A spring is installed between the wedge block 121 and the door frame 1. The wedge block 121 includes an inclined surface. The connecting pipe 116 is provided with an exhaust hole and a sealing plate 117 for sealing the exhaust hole. The sealing plate 117 is provided with a protrusion 118 extending to the outside of the connecting pipe 116. The wedge block 121 is provided with a support rod 127. The support rod 127 is provided with a paddle 126 for actuating the protrusion 118. The support rod 127 is specifically a self-springing telescopic rod. Both the paddle 126 and the protrusion 118 are elastic pieces. A spring is provided between the sealing plate 117 and the connecting pipe 116. Elastic pieces are provided on both the first door panel 21 and the third door panel 23.

[0048] Furthermore, when the door is closed, the motor drives the second gear 29 and the take-up reel 125 to rotate. The second gear 29 drives the first door panel 21 to rotate via the first gear 24. The first door panel 21 pushes the second door panel 22 to move via the insert block 26. The second door panel 22 pushes the third door panel 23 to move via the insert block 26. The tenon 27 on the third door panel 23 moves along the straight groove 134. The first door panel 21, the second door panel 22, and the third door panel 23 gradually move to the same horizontal plane. At the same time, the take-up reel 125 tightens the traction rope 124. At this time, the toothless part of the second gear 29 engages with the first gear 24. The take-up reel 125 continues to rotate and wind up the traction rope 124. The traction rope 124 drives the movable plate 12 to move closer to the center of the door frame 1. The inclined surface of the wedge block 121 pushes against the first door panel 21 and the second door panel 22. 2 and the third door panel 23 move inward toward the door frame 1. The first door panel 21 moves away from the second gear 29 along with the first gear 24. The third door panel 23 abuts against the guide slope 136 and moves along the guide slope 136. The tenon 27 on the third door panel 23 moves along the inclined groove 135 parallel to the guide slope 136. The guide slope 136 pushes the distance between the third door panel 23 and the first door panel 21 to decrease. The sealing strips 25 on the first door panel 21 and the third door panel 23 are embedded in the grooves on the second door panel 22. The sealing strips 25 seal the gaps between the first door panel 21 and the second door panel 22 and the gaps between the third door panel 23 and the second door panel 22, further improving the sealing performance of the door. At the same time, the elastic sheets on the first door panel 21 and the third door panel 23 are compressed and accumulate elastic potential energy.

[0049] The door continues to move inward toward the door frame 1, gradually approaching the fixed frame 131. The self-springing telescopic rod on the fixed frame 131 is compressed, and the protrusion is embedded in the fixed frame 131. The protrusion 251 is embedded in the cavity between the fixed frame 131 and the door frame 1, and squeezes the air in the cavity. The gas in the cavity moves toward the connecting pipe 116 and pushes the piston 115 and the horizontal movable bar 111 to move. The inclined tenon groove 114 on the horizontal movable bar 111 pushes the tenon block 113 on the vertical movable bar 112 to move, thereby driving the vertical movable bar 112 to move toward the middle of the door frame 1. The tenon block 113 on the vertical movable bar 112 moves along the tenon groove 114 on another horizontal movable bar 111, thereby driving the horizontal movable bar 111 to move toward the middle of the door frame 1. At the same time, the connecting rod 119 between the piston 115 and the connecting pipe 116 is stretched and accumulates elastic potential energy.

[0050] As wedge 121 continues to move downward, its vertical portion 123 contacts the outer wall of the door. Wedge 121 drives lever 126 to move downward via support rod 127. Lever 126 pushes protrusion 118, causing lever 126 and protrusion 118 to deform and interlock, thus moving lever 126 below protrusion 118. At this time, detector 13 of atmospheric pressure sensor (model 61302) detects the air pressure inside the chamber and outputs an electrical signal, allowing staff to check the door's sealing status. When the air pressure inside the chamber decreases, detector 13 outputs an electrical signal to alert staff that the door's sealing status is poor, allowing staff to handle the situation promptly.

[0051] When the door opens, the reel 125 releases the traction rope 124, and the wedge 121 moves away from the center of the door frame 1 under the traction of the spring. The vertical part 123 of the wedge 121 remains in contact with the outer wall of the door. The wedge 121 drives the lever 126 to move through the support rod 127. The lever 126 pushes the protrusion 118 and the sealing plate 117 to move. The connecting pipe 116 connects to the outside to release gas. The air pressure inside the connecting pipe 116 decreases, and the connecting rod 119 releases the accumulated elastic potential energy to pull. The piston 115 and the horizontal movable bar 111 move upward. The inclined tenon 114 on the horizontal movable bar 111 pushes the tenon 113 on the vertical movable bar 112 to move, which in turn drives the vertical movable bar 112 to move away from the middle of the door frame 1. The tenon 113 on the vertical movable bar 112 then moves along the tenon 114 on another horizontal movable bar 111, which in turn drives the horizontal movable bar 111 to move away from the middle of the door frame 1, and the sealing frame 11 separates from the door body.

[0052] As wedge 121 continues to move upward, it separates from the door body. The self-springing telescopic rod on the fixed frame 131 releases its elastic potential energy, pushing the door body to move outward from the door frame 1 until the third door frame 1 moves to the end of the inclined groove 135. The third door frame 1, the second door frame 1, and the first door frame 1 separate. The first gear 24 and the second gear 29 resume meshing. The second gear 29 drives the first gear 24 to rotate. The first door panel 21 drives the second door panel 22 to move through the shaft 28 and the insert 26. The second door panel 22 drives the third door panel 23 to move through the shaft 28 and the insert 26. The third door panel 23 moves under the constraint of the tenon 27 and the guide groove 133, causing the third door panel 23 to move closer to the first door panel 21, thereby closing the door body without exceeding the range of the door frame 1, facilitating the entry and exit of staff.

[0053] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mechanical trackless transmission curved sliding maintenance door for an operator's cab, characterized in that, Including the door frame, which is equipped with: A fixed frame, together with the door frame, forms a semi-enclosed chamber, and a detector for detecting gas pressure is installed inside the chamber; Multiple wedges; It also includes a door body, which comprises a first door panel, a second door panel, and a third door panel connected in sequence. The first door panel is movably mounted on the door frame. The door body is assembled for the following two states: In the first state, the first door panel, the second door panel, and the third door panel are folded so that the first door panel fits against the side of the door frame; In the second state, the first door panel, the second door panel, and the third door panel are on the same plane, and the wedge moves to push the door body against the fixed frame and squeeze the air inside the cavity. The door frame is provided with a sealing frame consisting of horizontal and vertical movable bars. The door body is fitted into the fixed frame so that the horizontal and vertical movable bars are retracted and span across the door frame and the door body. The horizontal movable strip is symmetrically provided with inclined tenons, and the vertical movable strip is provided with tenons that are adapted to the tenons. One of the horizontal movable strips moves to drive the sealing frame to retract or expand. The door frame is provided with a connecting pipe communicating with the chamber, and one of the horizontal movable bars is provided with a piston extending into the interior of the connecting pipe; A take-up reel is provided on the door frame, and a traction rope is provided between the take-up reel and the plurality of wedges. A second gear is provided on the take-up reel for driving the first door panel to rotate. The wedge is fixedly installed on the movable plate. A traction rope is provided between the take-up reel and the movable plate. A spring is provided between the movable plate and the door frame. A first gear that meshes with the second gear is provided on the first door plate. A toothless part is provided on the second gear. When the door is opened, the first door panel rotates relative to the door frame to drive the second and third door panels, causing the first, second, and third door panels to fold. The first door panel fits against the side of the door frame. After folding, the door does not exceed the range of the door frame. The opened door occupies very little space and can adapt to the narrow corridor corresponding to the door frame of the control room. When the door closes, the first door panel rotates to move the second and third door panels. The first, second, and third door panels are on the same plane. The wedge pushes the first, second, and third door panels into the door frame and into contact with the fixed frame, sealing the semi-enclosed chamber formed by the fixed frame and the door frame, and compressing the air inside the chamber, causing the air pressure inside the chamber to rise. At this time, the detector detects the air pressure inside the chamber and outputs an electrical signal, which allows the staff to check the airtightness of the door. When the air pressure inside the chamber drops, the detector outputs an electrical signal to remind the staff that the airtightness of the door is not good, which allows the staff to deal with it in time.

2. The mechanical trackless transmission curved sliding maintenance door for the control room according to claim 1, characterized in that, The first door panel, the second door panel, and the third door panel are all provided with protrusions that are adapted to the fixed frame, and the protrusions can be moved to fit into the fixed frame.

3. The mechanical trackless transmission curved sliding maintenance door for the control room according to claim 1, characterized in that, Both the first door panel and the third door panel are provided with inserts extending into the interior of the second door panel. The first door panel, the second door panel, and the third door panel are separated so that any two can rotate relative to each other.

4. A mechanical trackless transmission curved sliding maintenance door for an operator's cab according to claim 3, characterized in that, The second door panel is provided with a shaft, and the insert block is provided with a waist-shaped groove that matches the shaft.

5. A mechanical trackless transmission curved sliding maintenance door for an operator's cab according to claim 4, characterized in that, The door frame is provided with a guide slope, and the wedge moves to push the door body along the guide slope so that the first door panel, the second door panel and the third door panel are fitted together in sequence.

6. A mechanical trackless transmission curved sliding maintenance door for an operator's cab according to claim 5, characterized in that, The door frame is provided with a guide groove for guiding the movement of the third door panel. The guide groove includes a straight groove and an inclined groove parallel to the guide slope.

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