CN219858847U - Chain type displacement conveyor and cold storage transition room with same - Google Patents

Abstract

The utility model provides a chain type displacement conveyor and a cold storage transition room with the chain type displacement conveyor, relates to the technical field of cold chain logistics storage, and mainly aims to solve the technical problem that goods are difficult to transport at a door opening of a heat preservation door of a cold storage, and improve the efficiency of goods transport in the cold storage. The chain type displacement conveyor comprises a chassis, a displacement unit and a conveying unit, wherein the conveying unit is positioned on the chassis and is used for conveying a tray, and the displacement unit is connected with the conveying unit and drives at least part of the conveying unit to displace relative to the chassis; when at least part of the conveying unit is displaced, the conveying range of the conveying unit is changed relative to the chassis in the conveying direction. When the conveying unit moves to the upper part of the door opening relative to the underframe, the goods positioned outside the door opening can be conveyed to the inner side of the door opening, and the problem that the conveying efficiency of the goods is affected due to the fact that conveying lines cannot be arranged in the door opening area is solved.

Description

Chain type displacement conveyor and cold storage transition room with same

Technical Field

The utility model relates to the technical field of cold chain logistics storage, in particular to a chain type displacement conveyor and a cold storage transition room with the same.

Background

At present, the existing automatic three-dimensional refrigeration house generally comprises a normal temperature area, a transition area and a freezing area, and two adjacent areas are separated through a heat preservation door. In order to realize automatic conveying of cargoes, a conveying line scheme is often arranged to penetrate through an opening of the heat-insulating door. At this time, if the heat preservation door of the refrigeration house directly falls on the conveying line, the region of the conveying line below the door opening part is required to be made into a heat preservation wall, and the heat preservation wall has a gap when the heat preservation door is closed due to the structure, so that cold air in the refrigeration house leaks out, the refrigeration house runs cold seriously, meanwhile, the ground is frozen, larger potential safety hazards are brought to the transportation of goods, and meanwhile, certain fire hazards exist in the structure. In the prior art, a discontinuous design is generally carried out on a conveying line when the conveying line passes through a door opening, and a gap of 20-30cm is reserved at the door opening according to the thickness of the heat preservation door. When adopting the second kind, need carry through the manual handling or select to use the two-sided dull and stereotyped tray that has higher intensity to carry out the goods transportation, conventional chinese character ' chuanzhi ' tray can not pass through in door opening department because of the deformation when crossing the door opening, and two-sided dull and stereotyped tray not only processing cost is high, and can't use heap car and manual hydraulic fork truck to carry, seriously influences the conveying efficiency of goods.

In order to overcome the above problems, and improve the conveying efficiency of the cold chain logistics, so that the transportation of goods is more convenient, a conveying device capable of conveniently passing through the door opening and a cold storage transition room with the conveying device are required to be developed.

Disclosure of Invention

The utility model aims to provide a chain type displacement conveyor and a refrigerator transition room with the chain type displacement conveyor, so as to solve the technical problem that in the prior art, goods are difficult to transport at a refrigerator heat preservation door opening. The preferred technical solutions of the technical solutions provided by the present utility model can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the chain type displacement conveyor provided by the utility model comprises a chassis, a displacement unit and a conveying unit, wherein the conveying unit is positioned on the chassis and is used for conveying a tray, and the displacement unit is connected with the conveying unit and drives at least part of the conveying unit to displace relative to the chassis;

when at least part of the conveying unit is displaced, the conveying range of the conveying unit is changed relative to the chassis in the conveying direction.

The conveying unit can realize the conveying of cargoes in the conveying range; when the conveying unit is displaced, the conveying range of the conveying unit is changed, and at the moment, if the conveying unit moves to the upper part of the door opening relative to the underframe, the goods positioned outside the door opening can be smoothly conveyed to the inner side of the door opening, so that the problem that the conveying efficiency of the goods is affected due to the fact that conveying lines cannot be arranged in the door opening area is solved.

On the basis of the technical scheme, the utility model can be improved as follows.

As a further development of the utility model, the displacement unit can drive at least part of the transport unit to translate relative to the chassis.

As a further improvement of the utility model, the displacement unit comprises a driving piece and a displacement piece connected with the conveying unit, and the displacement piece can drive the conveying unit to reciprocate along a fixed path relative to the underframe under the driving of the driving piece;

or, the conveying unit comprises a first conveying part and a second conveying part, the first conveying part and the second conveying part are horizontally arranged along the same straight line, and the displacement unit is fixedly arranged between the first conveying part and the second conveying part and can drive the first conveying part to translate relative to the second conveying part.

As a further development of the utility model, the conveying unit is a telescopic conveying chain.

As a further improvement of the present utility model, the conveying unit includes a horizontal conveying portion and a turnover conveying portion, and the turnover conveying portion is rotatable by the displacement unit to be on the same plane as the horizontal conveying portion and in accordance with a conveying direction.

As a further improvement of the present utility model, the number of the inverting conveyance sections is two and is provided at both ends in the conveyance direction of the horizontal conveyance section, respectively.

As a further improvement of the present utility model, the conveying unit conveys the tray by a conveying chain including at least one of a transmission chain, a belt, and a timing belt.

The utility model also provides a refrigerator transition room, which comprises the chain type displacement conveyor, wherein a first heat preservation door and a second heat preservation door are respectively arranged on two sides of the refrigerator transition room, and the chain type displacement conveyor is positioned between the first heat preservation door and the second heat preservation door.

At this time, the conveying unit in the chain type displacement conveyor can displace when needed so as to pass through the door openings of the first heat preservation door and the second heat preservation door, and high-efficiency transportation of cargoes is realized.

As a further improvement of the utility model, the chain type displacement conveyor further comprises a control unit and a sensing unit, wherein the sensing unit is positioned on the chain type displacement conveyor and is electrically connected with the control unit, and the control unit is also electrically connected with the first heat preservation door and the second heat preservation door.

The control unit can be electrically connected with the sensing unit, the first heat preservation door and the second heat preservation door, so that the first heat preservation door and the second heat preservation door are controlled to be opened and closed, cold leakage is reduced as much as possible on the premise that goods conveying is not affected through effective control of opening and closing time of the first heat preservation door and the second heat preservation door, energy consumption of a refrigeration house is reduced, and energy conservation and emission reduction effects are achieved.

As a further improvement of the present utility model, the sensing unit includes an in-place travel switch, a tray in-place switch, and a middle-position proximity switch, wherein the in-place travel switch is located at one side in the conveying direction of the conveying unit, and the tray in-place switch and the middle-position proximity switch are located on a moving path of the conveying unit;

and/or the sensing unit comprises at least one of a distance sensor and a force sensor.

Compared with the prior art, the technical scheme provided by the preferred embodiment of the utility model has the following beneficial effects:

the control of the conveying range of the conveying unit is realized through the displacement unit, so that the conveying unit can generate certain displacement relative to the underframe, and the effect that the conveying unit passes through the door opening to realize the conveying of goods is achieved. The chain type displacement conveyor can be applied to automatic transportation of the refrigeration house, meanwhile, effective butt joint of different conveying equipment on two sides of a door opening can be achieved, so that the transportation efficiency of the refrigeration house is improved, and the effects of energy conservation and emission reduction are achieved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of an embodiment of a chain-type displacement conveyor of the present utility model;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a side view of FIG. 1;

FIG. 5 is an enlarged view of the structure of region D of FIG. 4;

FIG. 6 is a schematic view of the overall structure of another embodiment of the chain-type displacement conveyor of the present utility model;

fig. 7 is a front view of fig. 6;

FIG. 8 is a top view of FIG. 6;

FIG. 9 is a side view of FIG. 6;

FIG. 10 is a schematic view of another embodiment of the chain-type displacement conveyor of the present utility model;

FIG. 11 is a schematic view of the chain-type displacement conveyor of FIG. 10 in another state;

FIG. 12 is a schematic diagram of a transition room of the refrigerator according to the present utility model;

FIG. 13 is a schematic view of the structure of the refrigerator in the state where the first heat-preserving door is opened in the transition room of the present utility model;

FIG. 14 is a schematic view of the structure of the transfer of goods onto a chain-type displacement conveyor in a freezer transition of the present utility model.

In the figure: 10. a chain type displacement conveyor; 11. a chassis; 111. a limiting piece; 12. a displacement unit; 121. a driving member; 122. a displacement member; 123. a crank arm; 124. a chute; 125. a detection plate; 126. a telescopic conveyor chain; 13. a conveying unit; 131. a first conveying section; 132. a second conveying section; 133. a horizontal conveying section; 134. a turnover conveying part; 20. a transition room; 21. a first heat-preserving door; 22. the second heat preservation door; 23. a normal temperature zone conveyor; 24. a low temperature zone conveyor; 30. a control unit; 40. a sensing unit; 41. an in-place travel switch; 42. a tray in-place switch; 43. a neutral proximity switch.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

The technical scheme of the utility model is specifically described below with reference to the accompanying drawings.

The utility model provides a chain type displacement conveyor 10, which comprises a chassis 11, a displacement unit 12 and a conveying unit 13, wherein the conveying unit 13 is positioned on the chassis 11 and is used for conveying pallets, and the displacement unit 12 is connected with the conveying unit 13 and drives at least part of the conveying unit 13 to displace relative to the chassis 11; when at least part of the conveying unit 13 is displaced, the conveying range of the conveying unit 13 changes in the conveying direction with respect to the chassis 11, i.e., the conveying range increases, decreases, or displacement occurs in the conveying direction.

The conveying unit 13 is capable of realizing the conveyance of the goods within its conveying range; when the conveying unit 13 is displaced, the conveying range of the conveying unit 13 is also changed, at this time, if the conveying unit 13 moves above the door opening relative to the chassis 11, that is, the conveying unit 13 moves to cross the door opening and is in butt joint with the related conveying equipment positioned at the other side of the door opening, the goods positioned at the outer side of the door opening can be smoothly conveyed to the inner side of the door opening, and the goods conveying at the door opening is free from dependence on manpower conveying and double-sided flat plate trays, so that the problem that the conveying efficiency of the goods is affected due to the fact that conveying lines cannot be arranged in the door opening area is effectively solved.

Example 1:

as shown in fig. 1 to 5, the present embodiment provides a chain type displacement conveyor 10, the chain type displacement conveyor 10 including a chassis 11, a displacement unit 12, and a conveying unit 13, wherein the conveying unit 13 is located on the chassis 11 and is used for conveying pallets (in general, goods are loaded on the pallets for transportation, so that the pallets can be conveyed while conveying the goods), and the displacement unit 12 is connected with the conveying unit 13 and drives at least part of the conveying unit 13 to perform translational displacement with respect to the chassis 11; when at least part of the conveying unit 13 generates translational displacement, the conveying range of the conveying unit 13 changes relative to the chassis 11 in the conveying direction, that is, the conveying range increases, decreases or generates displacement relative to the chassis 11 in the conveying direction, so that the effect that the conveying unit 13 passes through the corresponding door opening and returns to the initial state is achieved, and the rapid conveying of goods across the door opening is completed.

In this embodiment, the displacement unit 12 includes a driving member 121 and a displacement member 122 connected to the conveying unit 13, where the displacement member 122 can drive the conveying unit 13 to reciprocate along a fixed path (the moving path is a straight line and parallel to the conveying direction of the conveying unit 13) relative to the chassis 11 under the driving of the driving member 121.

Specifically, the displacement member 122 includes a supporting frame and a conveying wheel, wherein the supporting frame is connected with the conveying unit 13, the conveying wheel is located below the supporting frame and includes a driving wheel and a driven wheel, the driving wheel is connected with the driving member 121, and when the driving wheel rotates, the supporting frame and the driven wheel can be driven to move, so as to realize the translation of the conveying unit 13.

It should be noted that, at this time, the upper surface of the chassis 11 is provided with a track that cooperates with the driving wheel and the driven wheel, and the displacement member 122 can drive the conveying unit 13 to reciprocate along a fixed path within the track range.

Of course, the chassis 11 is also provided with a stopper 111 for limiting the movement range of the support frame.

In this embodiment and similar embodiments, the driving wheel and the driving member 121 may be driven by a transmission shaft or by gears. In addition, the displacement unit 12 may also be a gear transmission structure, a linear module, a telescopic cylinder, a gear rack structure, a screw rod structure, etc. The above-described structures can achieve the effect of changing the conveying range of the conveying unit 13 by driving the conveying unit 13 to reciprocate along a fixed path in a manner of being connected to the conveying unit 13.

The structure and connection manner of the above components are all known to those skilled in the art, and are not described herein.

Taking fig. 1 as an example, the transport unit 13 here comprises a transport chain which can be rotated to transport pallets and goods. The conveyor chain in fig. 1 is of a chain type structure. Of course, a belt, a timing belt, or the like may be used as the conveying chain.

In addition, the above-described conveying unit 13 also includes a driving motor and a tensioning structure.

It can be understood that the conveying unit 13 in the chain-type displacement conveyor 10 provided in this embodiment can translate left and right relative to the base under the driving of the displacement unit 12, so that the position of the conveying unit 13 on the base is changed, and the effect of increasing the conveying range of the conveying unit 13 is achieved without changing the conveying length of the conveying unit 13. The chain type displacement conveyor 10 can penetrate through the door opening structure to convey cargos during use, and the conveying efficiency of the cargos is effectively improved.

Example 2:

the difference between this embodiment 2 and embodiment 1 is that the conveying unit 13 includes a horizontal conveying portion 133 and a reversing conveying portion 134, as shown in fig. 6 to 9, and the reversing conveying portion 134 can be rotated by the driving of the displacing unit 12 to be on the same plane as the horizontal conveying portion 133 and the conveying direction is identical, and the planes of the conveying portions are overlapped with each other.

When the chain type displacement conveyor 10 needs to transport goods through a door opening structure, the number of the overturning and conveying parts 134 and the number of the displacement units 12 are one and are arranged towards the door opening. When the door opening is in a closed state, the overturning and conveying part 134 is driven by the displacement unit 12 to overturn upwards or downwards by a certain angle relative to the horizontal conveying part 133, so as to avoid interference with the door body structure at the door opening; when the door opening is in an open state, the overturning conveying portion 134 rotates to be flush with the horizontal conveying portion 133, and at this time, the free end of the overturning conveying portion 134 can be matched with the relevant conveying device located on the other side of the door opening, so that cargo transferring is achieved.

In this embodiment, the overturning conveying portion 134 can be overturned upward relative to the horizontal conveying portion 133, and the maximum overturning angle is 90 degrees, and the specific structure and overturning process thereof are as follows:

the displacement unit 12 includes a turnover motor (not shown), a crank arm 123 and a chute 124, wherein the chute 124 is fixedly connected to the frame portion of the turnover conveying portion 134, one end of the crank arm 123 is slidably connected to the chute 124 in a snap-fit manner, and the other end is connected to an output shaft of the turnover motor.

When the turnover motor is started, the crank arm 123 is driven by the turnover motor to rotate, at the moment, the crank arm 123 can slide and move relative to the chute 124, meanwhile, the chute 124 is pulled to swing downwards, and the turnover conveying part 134 fixedly connected with the chute 124 is turned upwards to form a certain included angle with the horizontal conveying part 133; conversely, the inversion conveyance section 134 is inverted downward to be parallel to the horizontal conveyance section 133.

It should be noted that, in order to facilitate detection of the positional relationship between the turnover conveying part 134 and the horizontal conveying part 133, a detection plate 125 is provided on the frame provided with the horizontal conveying part 133, the detection plate 125 is provided adjacent to the chute 124, and two proximity switches are respectively provided at the upper and lower ends of the detection plate 125. During the swing of the chute 124, the ends of the chute 124 can be respectively close to the upper and lower ends of the detection plate 125 to trigger the proximity switch to send a signal. The control device associated with the proximity switch can acquire the state of the inverting conveyance part 134 by the signal.

When the chain type displacement conveyor 10 needs to sequentially pass through two door opening structures for cargo transportation, the chain type displacement conveyor 10 needs to be disposed between two door openings. The number of the turnover conveying parts 134 and the number of the displacement units 12 are two, and the turnover conveying parts are respectively arranged towards the door opening, namely, the two turnover conveying parts 134 are respectively arranged at two ends of the horizontal conveying part 133 in the conveying direction. The structure and the overturning mode are described above, and are not repeated here.

Example 3:

the present embodiment 3 is different from embodiment 1 in that the conveying unit 13 is a telescopic conveying chain 126 as shown in fig. 10 to 11.

The telescopic conveyor chain 126 can be stretched or contracted toward a fixed direction, thereby adjusting the conveying range of the conveying unit 13. The telescopic power can be hydraulic or cylinder driving. The above-mentioned telescopic structure is prior art, and is not described here again.

When the chain type displacement conveyor 10 needs to sequentially transport goods through two door opening structures, the number of the telescopic conveying chains 126 is two and symmetrically arranged along the same straight line, so that telescopic movement in two different directions is realized.

Example 4:

in this chain type displacement conveyor 10, the present embodiment 4 is different from the embodiment 1 in that the conveying unit 13 includes a first conveying portion 131 and a second conveying portion 132, which are horizontally arranged along the same line, at least a part of the first conveying portion 131 is located inside the second conveying portion 132, and the displacement unit 12 is connected to the first conveying portion 131 and the second conveying portion 132, respectively, and is capable of driving the first conveying portion 131 to translate with respect to the second conveying portion 132.

In this embodiment, the displacement unit 12 is a rack and pinion transmission structure.

Specifically, the number of racks is one and is disposed along the length direction of the first conveying portion 131. When the gear is driven by a motor or the like to rotate, the rack meshed with the gear can rotate therewith and drive the first conveying part 131 to translate relative to the second conveying part 132, so that the overall length of the conveying unit 13 is increased or decreased.

Alternatively, when the number of the racks is two, the two racks are disposed on the first conveying part 131 and the second conveying part 132, respectively, and the two racks are engaged with the upper and lower sides of the gear, respectively. When the gear rotates, the rack can rotate along with the gear and drive the first conveying part 131 and the second conveying part 132 to synchronously displace, and at this time, the first conveying part 131 and the second conveying part 132 can synchronously approach or separate from each other, so that the overall length of the conveying unit 13 is increased or reduced.

Example 5:

the utility model also provides a cold storage transition room 20, as shown in fig. 12, the cold storage transition room 20 comprises the chain type displacement conveyor 10, a first heat preservation door 21 and a second heat preservation door 22 are respectively arranged on two sides of the cold storage transition room 20, and the chain type displacement conveyor 10 is positioned between the first heat preservation door 21 and the second heat preservation door 22.

At this time, the conveying unit 13 of the chain type displacement conveyor 10 can be displaced as needed to pass through the door openings of the first and second heat-insulating doors 21 and 22, thereby realizing efficient transportation of goods.

Specifically, a normal temperature zone conveyor 23 and a low temperature zone conveyor 24 are respectively disposed outside the first thermal insulation door 21 and the second thermal insulation door 22. As shown in fig. 13 to 14, the above-mentioned normal temperature zone conveyor 23 and low temperature zone conveyor 24 can cooperate with the chain-type displacement conveyor 10 (described by way of example as the structure of embodiment 1) located in the transition room 20 to complete the transfer of the cargo.

The following describes the process of passing the above-mentioned goods through the first heat-preserving door 21 in detail:

after the low-temperature zone conveyor 24 located in the low-temperature zone conveys the goods to the outer side of the first heat-preserving door 21, the first heat-preserving door 21 is opened, then the displacement unit 12 in the chain displacement conveyor 10 is started and drives the conveying unit 13 to pass through the corresponding door opening and to be in butt joint with the low-temperature zone conveyor 24, and then the low-temperature zone conveyor 24 and the conveying unit 13 are started and realize the goods transferring simultaneously; when the goods are completely transferred to the upper end of the conveying unit 13, the displacement unit 12 is started and drives the conveying unit 13 to completely move into the transition zone, and then the first heat preservation door 21 is controlled to be closed. The second thermal insulation door 22 is then opened as needed, and the above operation is repeated.

In order to better control the opening and closing timing of the first heat-preserving door 21 and the second heat-preserving door 22, and avoid excessive cold leakage, as an optional embodiment, the cold store transition room 20 further includes a control unit 30 and a sensing unit 40, the sensing unit 40 is located on the chain displacement conveyor 10 and is electrically connected with the control unit 30, and the control unit 30 is further electrically connected with the first heat-preserving door 21 and the second heat-preserving door 22.

The control unit 30 may be electrically connected to the sensing unit 40, the first thermal insulation door 21 and the second thermal insulation door 22, so as to control the opening and closing of the first thermal insulation door 21 and the second thermal insulation door 22, and reduce the leakage of cold energy as much as possible under the premise of not affecting the transportation of goods by effectively controlling the opening and closing time of the first thermal insulation door 21 and the second thermal insulation door 22, thereby reducing the energy consumption of the refrigerator and achieving the effects of energy conservation and emission reduction. In general, a PLC controller may be selected as the control unit 30 to receive signals and control the operation of the associated devices.

As an alternative embodiment, the sensing unit 40 includes an in-place travel switch 41, a tray in-place switch 42, and a tray in-place switch 42, wherein at least one in-place travel switch 41 is located at one side in the conveying direction of the conveying unit 13, and the tray in-place switch 42 are located on the moving path of the conveying unit 13;

and/or the sensing unit 40 includes at least one of a distance sensor and a force sensor.

When the chain type displacement conveyor 10 is of the structure in embodiment 1, the above-described tray-in-place switch 42 and tray-in-place switch 42 are both located below the conveying unit 13 and are sequentially arranged on the moving path of the conveying unit 13. The associated trigger structure can be activated when moved proximate to the tray in place switch 42 or the tray in place switch 42.

When the chain-type displacement conveyor 10 is of the construction of example 2, the sensor unit 40 then also includes two proximity switches located on the detection plate 125. The type, number and arrangement position of the sensing units 40 can be adaptively adjusted according to the actual construction of the chain-type displacement conveyor 10, which will not be described in detail herein.

Specifically, the tray in-place switch 42 is a photoelectric switch, and the in-place travel switch 41 and the tray in-place switch 42 are both proximity switches.

The control unit 30 can control the opening and closing of the first thermal insulation door 21 and the second thermal insulation door 22 based on the signal from the sensor unit 40, and can also control the operation of the chain-type displacement conveyor 10.

Example 6:

the utility model also provides a control method of the cold storage transition room, which comprises the cold storage transition room 20 and further comprises the following steps:

step S1: the signal emitted by the sensing unit 40 is acquired,

step S2: the opening and closing of the first thermal insulation door 21 or the second thermal insulation door 22 is controlled according to the signal.

In step S2, the control unit 30 can receive the signal sent by the sensing unit 40, and control the opening and closing of the first thermal insulation door 21 and/or the second thermal insulation door 22 according to the received signal.

It should be noted that, the first thermal insulation door 21 and the second thermal insulation door 22 are also provided with corresponding sensing devices, and when the first thermal insulation door 21 and the second thermal insulation door 22 are opened or closed, the sensing devices can send signals to the control unit 30, so that the control unit 30 can conveniently control the chain type displacement conveyor 10 to work.

The following description will be given of the operation flow of the control unit 30 during the passage of the above-mentioned goods through the first heat-retaining door 21:

when the low temperature zone conveyor 24 located in the low temperature zone conveys goods to the outer side of the first heat preservation door 21, a tray in-place switch 42 located on the low temperature zone conveyor 24 can be triggered at the moment, the control unit 30 controls the first heat preservation door 21 to be opened after receiving a signal of the tray in-place switch 42, then controls the displacement unit 12 in the chain type displacement conveyor 10 to start and drive the conveying unit 13 to pass through a corresponding door opening and to be in butt joint with the low temperature zone conveyor 24, at the moment, a in-place travel switch 41 is triggered, then controls the displacement unit 12 to stop and controls the low temperature zone conveyor 24 and the conveying unit 13 to start, and the conveying chain rotates and conveys the tray to the conveying unit 13. When the pallet is completely transferred onto the conveying unit 13, the pallet in-place switch 42 located at the corresponding position of the chain type displacement conveyor 10 is triggered, and after receiving the signal, the control unit 30 controls the displacement unit 12 to drive reversely so that the conveying unit 13 is conveyed reversely until the conveying unit returns to the initial position, and the pallet in-place switch 42 located at the corresponding position of the chain type displacement conveyor 10 is triggered, which means that the conveying unit 13 is completely moved into the transition zone. The control unit 30 can control the first thermal insulation door 21 to be closed after receiving a signal at the tray in-place switch 42. After the interval is set (the specific duration may be set as required, and may be 0) or after the first thermal insulation door 21 is completely closed, the control unit 30 controls the second thermal insulation door 22 to be opened, and then the above steps are repeated.

The side of the normal temperature zone conveyor 23 located in the normal temperature zone, which is away from the second thermal insulation door 22, is also provided with a tray in-place switch 42. The control unit 30 may control the closing of the second thermal door 22 by a signal at the tray in place switch 42.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (9)

1. The chain type displacement conveyor is characterized by comprising a bottom frame, a displacement unit and a conveying unit, wherein the conveying unit is positioned on the bottom frame and is used for conveying a tray, and the displacement unit is connected with the conveying unit and drives at least part of the conveying unit to displace relative to the bottom frame;

when at least part of the conveying unit is displaced, the conveying range of the conveying unit is changed relative to the chassis in the conveying direction.

2. The chain type displacement conveyor of claim 1, wherein the displacement unit is capable of driving at least part of the conveying unit to translate relative to the chassis.

3. The chain-type displacement conveyor of claim 2, wherein:

the displacement unit comprises a driving piece and a displacement piece connected with the conveying unit, and the displacement piece can drive the conveying unit to reciprocate along a fixed path relative to the chassis under the driving of the driving piece;

or the conveying unit comprises a first conveying part and a second conveying part, the first conveying part and the second conveying part are horizontally arranged along the same straight line, and the displacement unit is respectively connected with the first conveying part and the second conveying part and can drive the first conveying part to translate relative to the second conveying part.

4. The chain type displacement conveyor according to claim 2, wherein the conveying unit is a telescopic conveying chain.

5. The chain type displacement conveyor according to claim 1, wherein the conveying unit includes a horizontal conveying portion and a turnover conveying portion rotatable by the displacement unit to be on the same plane as the horizontal conveying portion and in accordance with a conveying direction.

6. The chain type displacement conveyor according to claim 5, wherein the number of the inverting conveyance sections is two and is provided at both ends in the conveyance direction of the horizontal conveyance section, respectively.

7. A refrigerator transition room, characterized by comprising the chain type displacement conveyor of any one of claims 1-6, wherein a first heat preservation door and a second heat preservation door are respectively arranged on two sides of the refrigerator transition room, and the chain type displacement conveyor is positioned between the first heat preservation door and the second heat preservation door.

8. The refrigerated warehouse transition room as claimed in claim 7, further comprising a control unit and a sensing unit, wherein the sensing unit is located on the chain displacement conveyor and is electrically connected to the control unit, and wherein the control unit is further electrically connected to the first and second thermal insulation doors.

9. The refrigerator transition room according to claim 8, wherein the sensing unit includes an in-place travel switch, a tray in-place switch, and a neutral proximity switch, wherein the in-place travel switch is located at one side in a conveying direction of the conveying unit, and the tray in-place switch and the neutral proximity switch are located on a moving path of the conveying unit;

and/or the sensing unit comprises at least one of a distance sensor and a force sensor.