Lifting sealing door of refrigeration house

Abstract

The utility model provides a refrigeration house lifting sealing door which comprises a door frame, a door body and a door body lifting driving mechanism, the door body lifting driving mechanism drives the door body to lift along two sides of the door frame, and the refrigeration house lifting sealing door is characterized in that the door body lifting driving mechanism comprises a worm electric cylinder, a push-pull plate and a counterweight device, the worm electric cylinder is arranged in the middle of the top of the door frame, the lower end of a vertically-arranged push rod on the worm electric cylinder is elastically and movably connected with the push-pull plate, and the two ends of the push-pull plate are movably connected with the two sides of the top of the door body. The door body lifting driving mechanism is simple and reasonable, has a self-locking function, prevents the door body from sliding down after power loss, is not easy to shake and shake left and right when driving the door body to lift, is convenient to adjust the pressing stroke of the door body, is large in degree of freedom, cannot be overloaded when the door body reaches a limit position, is high in use safety, and cannot pollute the environment of the refrigeration house.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cold storage technical field relates to the improvement of cold storage door, specifically a cold storage lifting sealing door. BACKGROUND

[0002] The automatic vertical lifting door is usually used on the automatic cold storage of blood stations, hospitals and other units for storing plasma, red blood cells, white blood cells and biological products, and the temperature range of the use environment is generally-30~45℃. The cold storage lifting sealing door is an electrically heated door for automatically loading and unloading goods in the automatic cold storage. The existing electric vertical lifting door of the cold storage mainly has the following problems: 1. When the electric vertical lifting door is in an open state, if power failure occurs, the electric vertical lifting door will automatically slide down under the action of gravity, affecting normal use and posing a safety hazard; 2. The position of the goods transfer port of the cold storage where the electric vertical lifting door is located has a problem of not being tightly sealed, causing cold leakage, waste, and even an increase in the temperature in the cold storage, affecting the storage quality of plasma and other products; 3. The structure of the driving mechanism of the electric vertical lifting door is complex, and the driving motor has a large power, requiring a large installation space.

[0003] Chinese patent (application number: 202323519495.2) discloses a lifting sealing door for cold storage, which comprises a door frame, a door body and a door body lifting driving mechanism. The door body lifting driving mechanism drives the door body to lift along the two sides of the door frame. The characteristic is that the door body lifting driving mechanism comprises a motor, a worm gear reducer, two chain transmission shafts, two chains, two sprockets and two counterweights. The motor and the worm gear reducer are arranged at the middle position of the top of the door frame. The transmission shaft of the motor is connected with the input shaft of the worm gear reducer. The two output shafts respectively extend from the two sides of the shell of the worm gear reducer and are each connected with a chain transmission shaft. Each chain transmission shaft is provided with a sprocket on the outer end thereof. The two chains are respectively straddled on the corresponding sprockets. One end of each chain is connected with the door body, and the other end of each chain is connected with the counterweight. The structure is simple and compact. The door body can be self-locked after power failure, preventing the door body from sliding down after power failure and ensuring the safety in use.

[0004] The above-mentioned patent basically solves the main problems of the existing electric vertical lifting door of the cold storage, but the patent still has the following problems and deficiencies:

[0005] 1. The flexible transmission of the chain and the belt will cause shaking during the lifting of the door leaf, and the door leaf will also slightly sway left and right; 2. The adjustment freedom of the compression stroke is small, and the door body has the problems of overload at the limit position and low safety; 3. The exposed screw rod will fall lubricating oil, and the chain and the counterweight device will also be contaminated, which is not suitable for use on the door of the automatic cold storage of blood stations, hospitals and other units with high requirements for hygiene and cleanliness.

[0006] How to design a cold storage lifting and sealing door to solve the main problems and shortcomings of the above-mentioned patents, and improve the above-mentioned patented technologies to make the door lifting and sealing mechanism simple and reasonable, with a self-locking function to prevent the door from sliding down after power failure, and not easily vibrating or swaying when driving the door to lift and lower, with easy adjustment of the door pressing stroke and a large degree of freedom, and without overload when the door reaches the limit position, has high safety in use, and the door lifting and sealing mechanism will not pollute the cold storage environment, is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a cold storage lifting and sealing door. Its door lifting drive mechanism is simple and reasonable, has a self-locking function to prevent the door from sliding down after power failure, is not prone to shaking or swaying when driving the door to lift, the door pressing stroke is easy to adjust and has a large degree of freedom, the door will not be overloaded when it reaches the limit position, it has high safety, and the door lifting drive mechanism will not pollute the cold storage environment.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A cold storage lifting and sealing door includes a door frame, a door body, and a door body lifting drive mechanism. The door body lifting drive mechanism drives the door body to rise and fall along both sides of the door frame. The door body lifting drive mechanism includes a worm gear electric cylinder, a push-pull plate, and a counterweight device. The worm gear electric cylinder is located at the middle of the top of the door frame. The lower end of a vertically arranged push rod on the worm gear electric cylinder is elastically and movably connected to the push-pull plate. Both ends of the push-pull plate are movably connected to the top sides of the door body.

[0010] Improvements to the above technical solution: The lower end of the push rod is hinged to a U-shaped piece via a longitudinally arranged hinge shaft. Two bolt posts are vertically arranged on the top surface of the door corresponding to the U-shaped piece. Two compression springs are vertically arranged on the bottom surface of the U-shaped piece. The two compression springs are respectively loosely fitted on the corresponding two bolt posts, and the lower ends of the two compression springs abut against the top surface of the door. The push-pull plate is n-shaped. A clamping block is set at each end of the push-pull plate. A transverse groove is set in the middle of the clamping block. A rotating shaft is set on each side of the top of the door. A bearing is installed on each of the two rotating shafts. The two bearings are respectively embedded in the transverse groove of the clamping block on the corresponding side. The length of the transverse groove is greater than the diameter of the bearing.

[0011] Further improvement on the above technical solution: the door frame comprises two vertical columns and a cross brace connecting the top of the two vertical columns, the door body comprises a heat-insulating door leaf, a sealing strip is arranged on the inner side of the heat-insulating door leaf, at least two guide wheels are arranged on the left and right outer sides of the heat-insulating door leaf respectively, a guide groove is arranged on the inner side of each of the two vertical columns, each of the guide wheels slides up and down along the guide groove on the corresponding side, and a straight guide rail is vertically arranged on the front side of each of the two vertical columns and used for guiding and limiting the heat-insulating door leaf; the guide groove comprises a straight guide groove in the upper section and an arc guide groove in the lower section, and the straight guide groove is butted with the arc guide groove.

[0012] Further improvement on the above technical solution: a square window is formed in the middle of the heat-insulating door leaf, and transparent hollow glass is arranged on the square window; a door hole plate is arranged on the back of each of the two vertical columns, a square door hole is arranged on the lower half of the door hole plate, and the length and width of the square door hole are smaller than those of the heat-insulating door leaf.

[0013] Further improvement on the above technical solution: the counterweight device comprises a configuration block, a pulley and a lifting rope, the pulley is arranged on the top of the door frame, one end of the lifting rope is connected to the upper part of the door body, the other end of the lifting rope is connected to the upper end of the configuration block after passing through the pulley, the configuration block is in a free hanging state, and a sealing plastic sleeve is sleeved outside the configuration block.

[0014] Further improvement on the above technical solution: an electric control box is arranged on the top of the door frame and close to the worm electric cylinder, a controller and electrical elements are arranged in the electric control box, a travel switch is arranged on the upper part of the door frame, the controller is connected to the travel switch and the control end of the worm electric cylinder respectively, the door body is lifted to a fully open state, the top of the door body touches the travel switch, and the worm electric cylinder is controlled to stop running by the controller.

[0015] Further improvement on the above technical solution: the worm electric cylinder adopts a direct-current motor.

[0016] The utility model discloses compared with prior art has the advantages and positive effects of:

[0017] 1, the utility model discloses a worm electric cylinder as door body lifting drive mechanism, its structure is simple, reasonable, has self -locking function, prevents the door body to slide down after power failure, and when driving door body lifting, it is difficult to produce shaking and left and right swing, and the door body runs stably, and there is no deflection.

[0018] 2, the utility model discloses the lower end of the push rod that is vertically arranged on the worm electric cylinder is elastically movably connected with the push -pull plate, and the two ends of the push -pull plate are movably connected with the top of the door body. The door body pressing stroke can be adjusted and has greater freedom, the door body reaches the limit position and will not overload, and the use safety is high.

[0019] 3, the worm motor electric cylinder adopts direct current motor, the power of direct current motor can be smaller, namely can satisfy normal driving needs;

[0020] 4, the utility model discloses linear guide groove and arc guide groove cooperate with guide wheel, spring push and seal compression design of combination, door body and door frame seal well, and compression tightness adjustment is flexible, convenient;

[0021] 5, the door body lifting drive mechanism of the utility model will not pollute the environment of cold storage. The door body lifting drive mechanism cancels the transmission mechanism such as screw rod and chain, and the counterweight block is hung, and also does not use sliding connection, and the counterweight block has sealed plastic sleeve outside, these measures all avoid the pollution to cold storage, and it is especially suitable for the automatic cold storage door of blood station, hospital and other units with high sanitary and clean degree requirements. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a perspective view of a cold storage lifting sealing door of the utility model;

[0023] Figure 2 It is a front view of a cold storage lifting sealing door of the utility model;

[0024] Figure 3 It is Figure 2 A-A direction sectional view in

[0025] Figure 4 It is Figure 2 B-B direction sectional view in

[0026] In the drawing, the number is: 1, stand column;2, counterweight block;3, travel switch;4, compression block;5, push-pull plate;6, hollow glass;7, heat preservation door leaf;8, linear guide rail;9, guide groove;9.1, linear guide groove;9.2, arc guide groove;10, cross brace;11, worm motor electric cylinder;11.1, push rod;12, electric control box;13, U-shaped sheet;14, compression spring;15, door hole plate;15.1, square door hole;16, bearing. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings:

[0028] Referring to Figures 1-4The utility model discloses an embodiment of cold storage lifting sealing door, including door frame, door body and door body lifting drive mechanism, door body lifting drive mechanism drives door body along the both sides of door frame elevating, door body lifting drive mechanism includes worm motor driven cylinder 11, push -pull plate 5 and counterweight device. Worm motor driven cylinder 11 is set in the middle position of door frame top, and the lower end of push rod 11.1 vertically arranged on worm motor driven cylinder 11 is elastically connected with push -pull plate 5, and the both ends of push -pull plate 5 are movably connected with the top of door body.

[0029] Specifically: the lower end of the push rod 11.1 is hinged to a U-shaped sheet 13 through a longitudinally arranged hinge shaft, two bolt columns are vertically arranged on the top surface of the door body corresponding to the U-shaped sheet 13, two compression springs 14 are vertically arranged on the bottom surface of the U-shaped sheet 13, the two compression springs 14 are respectively sleeved on the corresponding two bolt columns, and the lower ends of the two compression springs 14 are in contact with the top surface of the door body. The push -pull plate 5 is n-shaped, and a compression block 4 is arranged at each end in the push -pull plate 5, a transverse groove is arranged in the middle of the compression block 4, a rotating shaft is arranged at each side of the top of the door body, a bearing 16 is arranged on each of the two rotating shafts, and the two bearings 16 are respectively embedded in the transverse groove corresponding to one side of the compression block 4. The length of the transverse groove is greater than the diameter of the bearing 16.

[0030] Further, the door frame includes two vertical columns 1 and a cross brace 10 connecting the top of the two vertical columns 1. The door body includes a thermal door leaf 7, a sealing strip is arranged on the inner side of the thermal door leaf 7, at least two guide wheels are arranged on the left and right outer sides of the thermal door leaf 7 respectively, a guide groove 9 is arranged on the inner side of each of the two vertical columns 1, each of the guide wheels slides up and down along the guide groove 9 on the corresponding side, and a linear guide rail 8 is vertically arranged on the front side of each of the two vertical columns 1 for guiding and limiting the thermal door leaf 7. The guide groove 9 includes a linear guide groove 9.1 in the upper section and an arc guide groove 9.2 in the lower section, and the lower end of the linear guide groove 9.1 is connected to the upper end of the arc guide groove 9.2. Preferably, the arc length of the arc guide groove 9.2 is less than 1 / 10 of the length of the linear guide groove 9.1, and the arc length of the arc guide groove 9.2 is greater than the diameter of the guide wheels arranged on the two sides of the door body.

[0031] Further, a square window is formed in the middle of the thermal door leaf 7, and a transparent hollow glass 6 is arranged on the square window; a door hole plate 15 is arranged on the back of the two vertical columns 1, a square door hole 15.1 is arranged on the lower half of the door hole plate 15, and the length and width dimensions of the square door hole 15.1 are smaller than the length and width dimensions of the thermal door leaf 7.

[0032] Further, the counterweight device comprises a counterweight 2, a pulley arranged on the top of the door frame, and a lifting rope, one end of which is connected to the upper part of the door body, and the other end of which is connected to the upper end of the counterweight 2 after passing through the pulley, and the counterweight 2 is in a free hanging state, and a sealed plastic sleeve is sleeved outside the counterweight 2.

[0033] Further, an electric control box 12 is arranged on the top of the door frame near the worm electric cylinder, a controller and electrical elements are arranged in the electric control box 12, a travel switch 3 is arranged on the upper part of the door frame, the controller is connected with the travel switch 3 and the control end of the worm electric cylinder 11 respectively, when the door body is lifted to a fully open state, the top of the door body touches the travel switch 3, and the worm electric cylinder 11 is stopped from running by the controller.

[0034] Preferably, the worm electric cylinder 11 adopts a direct current motor, and the power of the direct current motor can be relatively small, so as to meet normal driving needs.

[0035] The utility model adopts the worm electric cylinder 11 to replace the flexible transmission of the chain and the belt in the prior art, and has the following advantages:

[0036] 1. Precise control: the worm electric cylinder 11 can accurately control the movement speed, displacement and force through the controller, and is not prone to shaking and left-right shaking when driving the door body to lift.

[0037] 2. High efficiency: the worm electric cylinder 11 has high transmission efficiency and energy conversion efficiency, and can complete the work task with relatively small power consumption;

[0038] 3. High reliability: the worm electric cylinder 11 adopts mechatronic design, reduces the transmission components, reduces the failure rate, and improves the reliability;

[0039] 4. Environmental protection and energy saving: the worm electric cylinder 11 does not need to use hydraulic oil, avoids the problems of oil pollution and leakage, and also reduces energy consumption, and is particularly suitable for use on the door of an automatic cold storage of a blood station, a hospital and other units with high requirements for health and cleanliness.

[0040] The above description is not a limitation of the utility model, and the utility model is not limited to the above examples, and changes, modifications, additions or replacements made by ordinary skilled persons in the technical field within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A cold storage lifting sealing door, comprising a door frame, a door body and a door body lifting driving mechanism, the door body lifting driving mechanism drives the door body to lift along both sides of the door frame, characterized in that, The door body lifting drive mechanism comprises a worm electric cylinder, a push-pull plate and a counterweight device, the worm electric cylinder is arranged at the middle position of the top of the door frame, the lower end of the push rod arranged vertically on the worm electric cylinder is elastically connected with the push-pull plate, and the two ends of the push-pull plate are movably connected with the top of the door body.

2. The walk-in freezer lift door of claim 1, wherein, The lower end of the push rod is hinged with a U-shaped sheet through a longitudinally arranged hinge shaft, two bolt columns are arranged vertically on the top surface of the door body corresponding to the U-shaped sheet, two compression springs are arranged vertically on the bottom surface of the U-shaped sheet, the two compression springs are respectively sleeved on the corresponding two bolt columns, and the lower ends of the two compression springs are in abutment with the top surface of the door body; the push-pull plate is in the shape of n, one compression block is arranged at each end in the push-pull plate, a transverse groove is arranged in the middle of the compression block, one rotating shaft is arranged at each side of the top of the door body, one bearing is arranged on each of the two rotating shafts, and the two bearings are respectively embedded in the transverse groove of the corresponding one side of the compression block, and the length of the transverse groove is greater than the diameter of the bearing.

3. A cold store lift seal door according to claim 1 or 2, characterised in that, The door frame comprises two vertical columns and a cross brace connected with the top of the two vertical columns, the door body comprises a heat preservation door leaf, a sealing strip is arranged on the inner side of the heat preservation door leaf, at least two guide wheels are arranged on the left and right outer sides of the heat preservation door leaf respectively, a guide groove is arranged on the inner side of each of the two vertical columns, each of the guide wheels slides up and down along the guide groove on the corresponding one side, and a straight linear guide rail is vertically arranged on the front side of each of the two vertical columns for guiding and limiting the heat preservation door leaf; the guide groove comprises a straight linear guide groove in the upper section and an arc linear guide groove in the lower section, and the straight linear guide groove is butt-jointed with the arc linear guide groove.

4. The walk-in freezer lift door of claim 3, wherein, A square window is formed in the middle of the heat preservation door leaf, and transparent hollow glass is arranged on the square window; a door hole plate is arranged on the back surface of each of the two vertical columns, a square door hole is arranged on the lower half of the door hole plate, and the length and width of the square door hole are smaller than those of the heat preservation door leaf.

5. The walk-in freezer lift door according to claim 1 or 2, wherein, The counterweight device comprises a configuration block, a pulley and a lifting rope, the pulley is arranged on the top of the door frame, one end of the lifting rope is connected with the upper part of the door body, the other end of the lifting rope is connected with the upper end of the configuration block after passing through the pulley, the configuration block is in a free hanging state, and a sealing plastic sleeve is sleeved on the outside of the configuration block.

6. The walk-in freezer lift door of claim 4, wherein, The counterweight device comprises a configuration block, a pulley and a lifting rope, the pulley is arranged on the top of the door frame, one end of the lifting rope is connected with the upper part of the door body, the other end of the lifting rope is connected with the upper end of the configuration block after passing through the pulley, the configuration block is in a free hanging state, and a sealing plastic sleeve is sleeved on the outside of the configuration block.

7. The walk-in freezer lift door according to claim 1 or 2, wherein, An electric control box is arranged on the top of the door frame close to the worm electric cylinder, a controller and electrical elements are arranged in the electric control box, a travel switch is arranged on the upper part of the door frame, the controller is connected with the travel switch and the control end of the worm electric cylinder respectively, the door body is lifted to a fully open state, the top of the door body touches the travel switch, and the controller controls the worm electric cylinder to stop running.

8. The walk-in freezer lift door of claim 6, wherein, The electric control box is arranged on the top of the door frame near the worm electric cylinder, the controller and electric elements are arranged in the electric control box, the stroke switch is arranged on the upper part of the door frame, the controller is connected with the stroke switch and the control end of the worm electric cylinder respectively, the door body is lifted to the fully open state, the top of the door body touches the stroke switch, and the worm electric cylinder is controlled to stop running by the controller.

9. The walk-in freezer lift door according to claim 1 or 2, wherein, The worm electric cylinder adopts a direct current motor.

10. The walk-in freezer lift door of claim 8, wherein, The worm electric cylinder adopts a direct current motor.

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