CN114992500B

CN114992500B - Photoelectric protection device with quick response mechanism for cold drink quick-freezing tunnel

Info

Publication number: CN114992500B
Application number: CN202210855806.3A
Authority: CN
Inventors: 赵潇; 赵丹群
Original assignee: Wuxi Danxiao Machinery Co ltd
Current assignee: Wuxi Danxiao Machinery Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-11-29
Anticipated expiration: 2042-07-21
Also published as: CN114992500A

Abstract

The invention discloses a photoelectric protection device with a quick response mechanism for a cold drink quick-freezing tunnel, belonging to the technical field of cold drink manufacturing equipment, and comprising a chain tensioning assembly and a supporting plate, wherein a limiting bolt and an emergency response assembly are arranged on the chain tensioning assembly; the emergency response component comprises a mounting seat, a proximity switch, a folding fan and a trigger mechanism; according to the invention, the limit bolt and the emergency response component are arranged on the driven structure of the existing spiral instant freezer, when the chain on the supporting plate in the driven structure is subjected to tensile fracture, the trolley drives the limit bolt to move towards the emergency response component until the limit bolt is sensed by the proximity switch in the emergency response component, so that a circuit breaking signal is sent to an external host, and the host is immediately stopped to protect the whole machine. The outer side of the proximity switch is also provided with a folding type vertical protection structure triggered by the trigger mechanism, and the trigger mechanism is triggered by the travelling power of the trolley at the same time, so that the folding fan is driven to be unfolded when the trigger mechanism acts, and a protection surface vertical to the chain is formed.

Description

Photoelectric protection device with quick response mechanism for cold drink quick-freezing tunnel

Technical Field

The invention relates to the technical field of cold drink manufacturing equipment, in particular to a photoelectric protection device with a quick response mechanism for a cold drink quick-freezing tunnel.

Background

The quick-freezing tunnel machine is a high-efficiency freezing device capable of freezing a large number of products in a short time, and can effectively and economically freeze various products placed in the quick-freezing machine. The instant freezer can be generally classified into a pusher instant freezer, a reciprocating instant freezer, a plate instant freezer, a fluidized instant freezer, a tunnel instant freezer, a screw instant freezer, a lift instant freezer, and the like.

The structure of the existing spiral instant freezer is mainly composed of a transmission part, an evaporator, a storehouse plate and an electric device, wherein the transmission part is composed of a transmission motor, a mesh belt, a turret and an independent frequency converter. As the driven structure which is shown in the attached drawing 1 of the specification and passively drives the single-layer material plate to rotate on the traditional turret, the driven structure comprises a supporting plate which is driven by a chain and a turret driving structure, a tensioning device for tensioning the chain is arranged on the outer side of the supporting plate, and due to the fact that the driven structure is lack of an emergency protection device, the chain of the tunnel is continuously stretched when the tunnel runs for a long time, and the chain and the supporting plate can fall off. Because the main machine can not accept the halt in time, the machine can still continue to operate after the chain falls off, and huge damage is caused to equipment. In view of this, we propose a photoelectric protection device with a fast response mechanism for a cold drink quick-freezing tunnel.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide a photoelectric protection device with a quick response mechanism for a cold drink quick-freezing tunnel, so as to solve the problems in the background technology.

2. Technical scheme

A photoelectric protection device with a quick response mechanism for a cold drink quick-freezing tunnel is arranged on a driven structure of a quick-freezing machine turret and comprises a chain tensioning assembly and a supporting plate meshed with a chain for transmission, wherein the chain tensioning assembly comprises a vertical plate, guide pillars are horizontally and fixedly arranged at four corners of the vertical plate, a tensioning cavity is formed by the gaps of the four guide pillars, a trolley is arranged in the tensioning cavity, the periphery of the tail end of the trolley is respectively and slidably connected with the four guide pillars through taper wheels, the supporting plate is clamped in the head end of the trolley, a spring rod penetrates through the middle of the vertical plate, and a tensioning spring which is extruded by the trolley to store force is sleeved on the spring rod; a limiting bolt is mounted on the outer wall of the tail end of the trolley through an angle plate, an emergency response assembly is arranged on the outer wall of one guide pillar close to the limiting bolt, and the emergency response assembly is arranged on the moving path of the limiting bolt;

the emergency response assembly comprises a mounting seat fixedly arranged on the outer wall of the guide pillar, one end of the mounting seat, which is close to the limit bolt, is provided with a proximity switch, one end of the mounting seat, which is close to the supporting plate, is provided with a folding fan, a trigger mechanism penetrating the mounting seat is arranged between the folding fan and the proximity switch, the input end of the trigger mechanism penetrates through the guide pillar to be contacted with the taper wheel, and the output end of the trigger mechanism is connected with the free end of the folding fan, so that when a chain on the supporting plate is broken due to stretching, a tension spring with stored force pushes the trolley to move outwards, the movable trolley drives the limit bolt to be close to the proximity switch, and a breaking signal of an external host is sent out through the proximity switch; meanwhile, the taper wheel of the movable trolley rolls the input end of the trigger mechanism, so that the output end of the trigger mechanism drives the folding fan to be unfolded to form a protective surface vertical to the chain, and the pinch-off of the chain is avoided.

Preferably, the proximity switch is matched with the position of the limit bolt.

Preferably, the trigger mechanism includes a pair of sockets penetrating the mounting seat, the pair of sockets includes a right-angle structure formed by a horizontal input portion and a vertical output portion, an input end of the horizontal input portion penetrates through the guide pillar and extends to a moving path of the taper wheel, a press block in contact with the taper wheel is arranged on the input end of the horizontal input portion in an embedded structure, the press block is arranged in an inclined manner, a low end of the press block, which is close to the taper wheel, is rotatably connected with an embedded groove in the horizontal input portion through a rotating shaft, and a long hole is formed in a high end of the press block, which is far away from the taper wheel.

Preferably, a chute communicated with the top surface of the vertical output part is formed in the vertical output part, a clamping rod is movably connected in the chute, the lower end of the clamping rod is connected with the bottom surface of the chute through a spring A, a clamping head is arranged at the upper end of the clamping rod, a pressing rod is vertically and fixedly connected to the middle of one side of the clamping rod, the terminal of the pressing rod extends into the long hole and is in sliding connection with the long hole, a limiting rod is fixedly connected to the middle of the other side of the clamping rod, and the limiting rod is limited in a limiting groove formed in the inner wall of the chute.

Preferably, the trigger mechanism further comprises a guide plate fixedly arranged on the top surface of the counter socket, the guide plate is arranged on one side close to the proximity switch, a trigger rod horizontally penetrates through the middle of the guide plate through a key groove, a clamping seat is vertically sleeved on the trigger rod, the clamping seat is in interference fit with a clamping head, and a spring B sleeved on the trigger rod is arranged between the clamping seat and the guide plate.

Preferably, a cam rod is inserted into the output end of the trigger rod, a curve groove is formed in the outer wall of the circumference of the input end of the cam rod, the curve groove is in sliding connection with a screw penetrating through the output end of the trigger rod, and the output end of the cam rod is sleeved with a swing shaft.

Preferably, the slotting direction of the curved groove is matched with the unfolding direction of the folding fan, and the twisting angle of the curved groove is matched with the unfolding angle of the folding fan.

Preferably, the fixed end of the folding fan is fixedly arranged on the mounting seat through a clamping block, and the free end of the folding fan is rotatably connected with the end of the swing shaft.

Preferably, the radius of the folding fan is larger than the linear distance from the proximity switch to the folding fan.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

1. according to the invention, the limit bolt and the emergency response component are arranged on the driven structure of the existing spiral instant freezer, when the chain on the supporting plate in the driven structure is subjected to tensile fracture, the trolley drives the limit bolt to move towards the emergency response component until the limit bolt is sensed by the proximity switch in the emergency response component, so that a circuit breaking signal is sent to an external host, and the host is immediately stopped to protect the whole machine.

2. The foldable vertical protection structure triggered by the trigger mechanism is arranged on the outer side of the proximity switch, the trigger mechanism is triggered simultaneously by the traveling power of the trolley, so that the folding fan is driven to be unfolded when the trigger mechanism acts, a protection surface vertical to the chain is formed, the proximity switch can be protected from being thrown by the stretched chain through the protection surface, meanwhile, the clearance of the sensing area of the proximity switch is also guaranteed, and the misjudgment of the proximity switch 502 is avoided.

3. The invention has the advantages that the trigger mechanism which is extruded by the taper wheel to act is arranged, so that the clamping structure is stable, the rotation is labor-saving, the structural arrangement is simple, the response is rapid, and the later maintenance cost is favorably reduced.

4. The invention utilizes the expansion of the folding fan to form a protective surface vertical to the chain, on one hand, the chain can be hit on the folding fan to the maximum extent, and on the other hand, when the whipping radius of the chain is too large, the whipping radius of the chain can be further reduced through the blocking of the folding fan.

Drawings

FIG. 1 is a schematic view of a driven structure of a turret in the prior art;

FIG. 2 is a schematic diagram of a pre-triggering emergency response assembly according to the present invention;

FIG. 3 is a schematic diagram of the triggered emergency response assembly according to the present invention;

FIG. 4 is a schematic front view of the construction of the emergency response assembly of the present invention;

FIG. 5 is a schematic structural back view of the emergency response assembly of the present invention;

FIG. 6 is a schematic cross-sectional view of the mounting base of the present invention;

FIG. 7 is a schematic view of the locking bar and its connection structure of the present invention;

FIG. 8 is a cross-sectional view of the trigger bar of the present invention;

the numbering in the figures illustrates: 1. a chain tensioning assembly; 2. a support plate; 3. a gusset; 4. a limit bolt; 5. an emergency response component; 6. a trigger mechanism;

101. a vertical plate; 102. a guide post; 103. a trolley; 104. a taper wheel; 105. a spring lever; 106. tensioning the spring;

501. a mounting seat; 502. a proximity switch; 503. folding the fan;

601. aligning the socket; 602. a horizontal input section; 603. briquetting; 604. a chute; 605. a clamping rod; 606. a spring A; 607. clamping a head; 608. a pressure lever; 609. a limiting rod; 610. a limiting groove; 611. a guide plate; 612. a trigger lever; 613. a card holder; 614. a spring B; 615. a cam lever; 616. a curved groove; 617. a screw; 618. and (4) swinging the shaft.

Detailed Description

In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-8, the present invention provides a technical solution:

a photoelectric protection device with a quick response mechanism for a cold drink quick-freezing tunnel is arranged on a driven structure of a quick-freezing machine turret and comprises a chain tensioning assembly 1 and a supporting plate 2 meshed with a chain for transmission, wherein the chain tensioning assembly 1 comprises a vertical plate 101, guide pillars 102 are horizontally and fixedly arranged at four corners of the vertical plate 101, a tensioning cavity is formed by the gaps of the four guide pillars 102, a trolley 103 is arranged in the tensioning cavity, the peripheral side of the tail end of the trolley 103 is respectively and slidably connected with the four guide pillars 102 through a taper wheel 104, the supporting plate 2 is clamped in the head end of the trolley 103, a spring rod 105 is arranged in the middle of the vertical plate 101 in a penetrating manner, and a tensioning spring 106 which is extruded by the trolley 103 to store force is sleeved on the spring rod 105; the outer wall of the tail end of the trolley 103 is provided with a limiting bolt 4 through an angle plate 3, the outer wall of one guide pillar 102 close to the limiting bolt 4 is provided with an emergency response assembly 5, and the emergency response assembly 5 is arranged on the moving path of the limiting bolt 4;

the emergency response component 5 comprises a mounting seat 501 fixedly arranged on the outer wall of the guide post 102, one end of the mounting seat 501, which is close to the limit bolt 4, is provided with a proximity switch 502, one end of the mounting seat 501, which is close to the supporting plate 2, is provided with a folding fan 503, a trigger mechanism 6 which is arranged on the mounting seat 501 in a penetrating manner is arranged between the folding fan 503 and the proximity switch 502, the input end of the trigger mechanism 6 penetrates through the guide post 102 to be contacted with the taper wheel 104, the output end of the trigger mechanism 6 is connected with the free end of the folding fan 503, so that when a chain on the supporting plate 2 is broken, the tension spring 106 with accumulated force pushes the trolley 103 to move outwards, the movable trolley 103 is utilized to drive the limit bolt 4 to be close to the proximity switch 502, and a breaking signal of an external host is sent out through the proximity switch 502; meanwhile, the taper wheel 104 of the mobile trolley 103 rolls the input end of the trigger mechanism 6, so that the output end of the trigger mechanism 6 drives the folding fan 503 to unfold to form a protective surface perpendicular to the chain, and the broken chain is prevented from throwing the proximity switch 502. The proximity switch 502 is a position switch that can be operated without mechanical direct contact with moving parts, and when the sensing surface of the object proximity switch reaches an operating distance, the switch can be operated without mechanical contact and any pressure applied, thereby driving a dc appliance or providing a control command to a computer (plc) device. The proximity switch 502 is a switch type sensor (i.e., a contactless switch), which has the characteristics of a travel switch and a microswitch, and has the characteristics of sensing performance, reliable action, stable performance, fast frequency response, long application life, strong anti-interference capability, water resistance, shock resistance, corrosion resistance and the like. When the metal detection body approaches to the induction area of the switch, the switch can send out an electric command rapidly without contact, pressure and spark, and accurately reflect the position and the stroke of the motion mechanism.

According to the invention, the limit bolt 4 and the emergency response component 5 are arranged on the driven structure of the existing spiral instant freezer, when the chain on the supporting plate in the driven structure is subjected to tensile fracture, the trolley 103 drives the limit bolt 4 to move towards the emergency response component 5 until the limit bolt is sensed by the proximity switch 502 in the emergency response component 5, so that a circuit breaking signal is sent to an external host, and the host is immediately stopped to protect the whole machine. According to the invention, the folding type vertical protection structure triggered by the trigger mechanism 6 is also arranged on the outer side of the proximity switch 502, the trigger mechanism 6 is triggered by utilizing the travelling force of the trolley 103, so that the folding fan 503 is driven to be unfolded when the trigger mechanism 6 acts, and a protection surface vertical to the chain is formed, and through the protection surface, the proximity switch 502 can be protected from being thrown by the stretched chain, meanwhile, the clearance of the sensing area of the proximity switch 502 is also ensured, and the misjudgment of the proximity switch 502 is avoided.

Specifically, the proximity switch 502 is matched with the position of the limit bolt 4.

Further, trigger mechanism 6 is including wearing to locate socket 601 on mount pad 501, constitute the right angle structure to socket 601 including by horizontal input portion 602 and vertical output portion 604, the input of horizontal input portion 602 passes on guide pillar 102 extends to the removal route of taper wheel 104, and be embedded structure on the input of horizontal input portion 602 and be equipped with the briquetting 603 with the contact of taper wheel 104, briquetting 603 is the slope setting, and the briquetting 603 is close to the low side of taper wheel 104 and is connected through the caulking groove rotation on pivot and the horizontal input portion 602, the briquetting 603 is kept away from the high end of taper wheel 104 and has been seted up the slot hole. As shown in fig. 5 and 7, the pressing block 603 is an inclined structure, when the taper wheel 104 on the trolley 103 rolls from the lower end of the pressing block 603 to the higher end thereof, the higher end of the pressing block 603 rotates around the rotating shaft on the lower end thereof, at this time, the higher end of the pressing block 603 performs circular motion, and the long hole provides a moving space for the pressing rod 608 to slide downwards, so that the higher end of the pressing block 603 presses the pressing rod 608 to fall down, and further, the clamping rod 605 which is fixedly connected with the pressing rod 608 is knocked down at the same time.

Still further, a sliding groove communicated with the top surface of the vertical output part 604 is formed in the vertical output part, a clamping rod 605 is movably connected in the sliding groove, the lower end of the clamping rod 605 is connected with the bottom surface of the sliding groove through a spring A606, a clamping head 607 is arranged at the upper end of the clamping rod 605, a pressing rod 608 is vertically and fixedly connected to the middle of one side of the clamping rod 605, the terminal end of the pressing rod 608 extends into the long hole and is in sliding connection with the long hole, a limiting rod 609 is fixedly connected to the middle of the other side of the clamping rod 605, and the limiting rod 609 is limited in a limiting groove 610 on the inner wall of the sliding groove. According to the invention, the clamping head 607 is provided with an inclined plane at one side close to the folding fan 503, and a vertical plane is arranged at the terminal of the inclined plane, so that the clamping seat 613 on the trigger rod 612 can slide from one side of the folding fan 503 to one side of the proximity switch 502, and is in clamping fit with the clamping head 607.

Furthermore, the triggering mechanism 6 further includes a guiding plate 611 fixed on the top surface of the opposite socket 601, the guiding plate 611 is disposed near one side of the proximity switch 502, a triggering rod 612 horizontally penetrates the middle portion of the guiding plate 611 through a key slot, a clamping seat 613 is vertically sleeved on the triggering rod 612, the clamping seat 613 is in interference fit with the clamping head 607, and a spring B614 sleeved on the triggering rod 612 is disposed between the clamping seat 613 and the guiding plate 611. The clamping seat 613 is a conical seat, the conical surface of the conical seat is opposite to the inclined surface of the clamping head 607, sliding reset of the clamping seat 613 on the clamping head 607 is facilitated, the end surface of the clamping seat 613 is abutted against the vertical plane of the clamping head 607 to form a clamping structure, and the clamping structure formed by the contact of the plane structure is relatively stable.

It should be noted that a cam rod 615 is inserted into the output end of the trigger rod 612, a curved groove 616 is formed on the outer wall of the circumference of the input end of the cam rod 615, the curved groove 616 is slidably connected with a screw 617 penetrating through the output end of the trigger rod 612, and the output end of the cam rod 615 is sleeved with a swing shaft 618. As shown in the cross-sectional structure of the trigger rod 612 in FIG. 8, the cam rod 615 guided by the screw 617 is provided at the output end of the trigger rod 612, so that during the feeding motion of the trigger rod 612, the curved groove 616 on the cam rod 615 is pressed by the head of the screw 617, generating a lateral rotation force, and further causing the swing shaft 618 at the output end of the cam rod 615 to rotate along with the cam rod 615. Utilize this structure, it is more laborsaving to rotate to structural arrangement is simple, is favorable to the later stage to overhaul. The present invention may also provide a stabilizer on the cam bar 615 to further improve the stability of the rotation of the cam bar 615, which is a conventional operation of the prior art and thus is not shown in the present invention.

It is noted that the slotting direction of the curved slot 616 is adapted to the unfolding direction of the folding fan 503, and the twisting angle of the curved slot 616 is adapted to the unfolding angle of the folding fan 503. The torsion angle of the curved groove 616 is 180 degrees, and the curved groove is matched with the unfolded semicircular protective surface of the folding fan 503.

In addition, the fixed end of the folding fan 503 is fixed on the mounting seat 501 through a clamping block, and the free end of the folding fan 503 is rotatably connected with the terminal of the swing shaft 618. As shown in fig. 4, the fixed end of the folding fan 503 is fixedly disposed on the mounting seat 501 through a clamping block, and the unfolded free end of the folding fan 503 is connected with the terminal of the swinging shaft 618 through a pin.

In addition, the radius of the folding fan 503 is larger than the linear distance from the proximity switch 502 to the folding fan 503. The application prospect of the invention lies in avoiding the chain on the supporting plate from breaking, does not disclose other positions of the chain on the driven structure, also aims to protect the broken chain from throwing away the proximity switch 502 to cause maintenance cost increase; according to the invention, the folding fan 503 is unfolded to form a protective surface vertical to the chain, so that the chain can be hit on the folding fan 503 to the maximum extent on one hand, and on the other hand, when the whipping radius of the chain is too large, the whipping radius of the chain can be further reduced through the blocking of the folding fan 503, namely, the chain is broken from the left end of the supporting plate 2 shown in FIG. 3 (the whipping force of the chain part crossing the quadrant point is reduced, and the chain broken from the quadrant point has the maximum whipping force and the whipping length), after the chain contacts the edge of the folding fan 503, the radius of the broken end of the chain is redefined through the contact point, and the original whipping radius of the broken end of the chain is reduced in the process, so that the proximity switch 502 is more effectively protected from being hit.

The present invention relates to circuits and electronic components and modules, all of which are known in the art and are fully within the reach of those skilled in the art, and it is not necessary to state the art that the present invention is susceptible to modifications in its internal construction and method.

The working principle is as follows: when the chain is broken from the supporting plate 2, the tensioning spring 106 of the original power-accumulating tensioning chain pushes the trolley 103 to move outwards, the moving trolley 103 is utilized to drive the limit bolt 4 to be close to the proximity switch 502, and once the sensing range of the proximity switch 502 is reached, the proximity switch 502 can send out a circuit breaking signal of an external host; meanwhile, the taper wheel 104 of the moving trolley 103 rolls from the lower end of the pressing block 603 to the higher end thereof, the higher end of the pressing block 603 performs circular motion around the lower end thereof, so that the pressing rod 608 in the long hole of the pressing block 603 is forced to move downwards along with the pressing rod in the vertical direction, and the clamping rod 605 fixedly connected with the pressing rod 608 simultaneously performs falling motion, so that the clamping seat 613 at the upper end of the clamping rod 605, which is clamped by the clamping head 607, cancels a limiting structure when the clamping rod 605 falls, and pushes the trigger rod 612 to move towards one side of the supporting plate 2 under the restoring force of the stored spring B614; the cam rod 615 in the output end of the trigger rod 612 is pressed by the moving screw 617 and rotates, and under the guiding action of the curved groove 616, the swing shaft 618 at the output end of the cam rod 615 swings half a circle, so that the end of the swing shaft 618 drives the folding fan 503 to expand to form a protective surface perpendicular to the chain, and the broken chain is prevented from throwing the proximity switch 502.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a cold drink quick-freeze tunnel is with photoelectric protection device who has a quick response mechanism, photoelectric protection device locates on the driven structure of quick-freeze machine capstan head, including chain tensioning assembly (1) and with driven layer board (2) of chain meshing, its characterized in that: the chain tensioning assembly (1) comprises a vertical plate (101), guide pillars (102) are horizontally and fixedly arranged at four corners of the vertical plate (101), a tensioning cavity is formed by gaps among the four guide pillars (102), a trolley (103) is arranged in the tensioning cavity, the periphery of the tail end of the trolley (103) is respectively in sliding connection with the four guide pillars (102) through taper wheels (104), the supporting plate (2) is clamped inside the head end of the trolley (103), a spring rod (105) penetrates through the middle of the vertical plate (101), and a tensioning spring (106) which is extruded by the trolley (103) to store force is sleeved on the spring rod (105);

the outer wall of the tail end of the trolley (103) is provided with a limiting bolt (4) through an angle plate (3), the outer wall of one guide pillar (102) close to the limiting bolt (4) is provided with an emergency response assembly (5), and the emergency response assembly (5) is arranged on a moving path of the limiting bolt (4);

the emergency response assembly (5) comprises a mounting seat (501) fixedly arranged on the outer wall of the guide post (102), a proximity switch (502) is arranged at one end, close to the limiting bolt (4), of the mounting seat (501), a folding fan (503) is arranged at one end, close to the supporting plate (2), of the mounting seat (501), a trigger mechanism (6) penetrating through the mounting seat (501) is arranged between the folding fan (503) and the proximity switch (502), the input end of the trigger mechanism (6) penetrates through the guide post (102) to be in contact with the taper wheel (104), the output end of the trigger mechanism (6) is connected with the free end of the folding fan (503), so that when a chain on the supporting plate (2) is broken, a tension spring (106) storing power pushes the trolley (103) to move outwards, the movable trolley (103) is used for driving the limiting bolt (4) to be close to the proximity switch (502), and a circuit breaking signal of an external host is sent through the proximity switch (502); meanwhile, the taper wheel (104) of the movable trolley (103) rolls the input end of the trigger mechanism (6), so that the output end of the trigger mechanism (6) drives the folding fan (503) to be unfolded to form a protective surface vertical to the chain, and the stretched chain is prevented from throwing the proximity switch (502).

2. The photoelectric protection device with the quick response mechanism for the cold drink quick-freezing tunnel according to claim 1, characterized in that: the proximity switch (502) is matched with the position of the limit bolt (4).

3. The photoelectric protection device with the quick response mechanism for the cold drink quick-freezing tunnel according to claim 1, characterized in that: the trigger mechanism (6) comprises a socket pair (601) arranged on the mounting base (501) in a penetrating mode, the socket pair (601) comprises a right-angle structure formed by a horizontal input portion (602) and a vertical output portion (604), the input end of the horizontal input portion (602) penetrates through a guide pillar (102) and extends to the moving path of the taper wheel (104), a pressing block (603) in contact with the taper wheel (104) is arranged on the input end of the horizontal input portion (602) in an embedded structure, the pressing block (603) is arranged in an inclined mode, the lower end, close to the taper wheel (104), of the pressing block (603) is connected with a caulking groove in the horizontal input portion (602) in a rotating mode through a rotating shaft, and a long hole is formed in the high end, far away from the taper wheel (104), of the pressing block (603).

4. The photoelectric protection device with the quick response mechanism for the cold drink quick-freezing tunnel according to claim 3, wherein: the vertical output part (604) is provided with a sliding groove communicated with the top surface of the vertical output part, a clamping rod (605) is movably connected in the sliding groove, the lower end of the clamping rod (605) is connected with the bottom surface of the sliding groove through a spring A (606), the upper end of the clamping rod (605) is provided with a clamping head (607), the middle of one side of the clamping rod (605) is vertically and fixedly connected with a pressing rod (608), the terminal of the pressing rod (608) extends into the long hole and is in sliding connection with the long hole, the middle of the other side of the clamping rod (605) is fixedly connected with a limiting rod (609), and the limiting rod (609) is limited in a limiting groove (610) on the inner wall of the sliding groove.

5. The photoelectric protection device with a quick response mechanism for the cold drink quick-freezing tunnel according to claim 4, wherein: the trigger mechanism (6) further comprises a guide plate (611) fixedly arranged on the top surface of the counter socket (601), the guide plate (611) is arranged close to one side of the proximity switch (502), a trigger rod (612) horizontally penetrates through the middle of the guide plate (611) through a key groove, a clamping seat (613) is vertically sleeved on the trigger rod (612), the clamping seat (613) is in interference fit with a clamping head (607), and a spring B (614) sleeved on the trigger rod (612) is arranged between the clamping seat (613) and the guide plate (611).

6. The photoelectric protection device with the quick response mechanism for the cold drink quick-freezing tunnel according to claim 5, wherein: the cam rod (615) is inserted into the output end of the trigger rod (612), a curve groove (616) is formed in the outer wall of the circumference of the input end of the cam rod (615), the curve groove (616) is in sliding connection with a screw (617) penetrating through the output end of the trigger rod (612), and the output end of the cam rod (615) is sleeved with a swing shaft (618).

7. The photoelectric protection device with the quick response mechanism for the cold drink quick-freezing tunnel according to claim 6, wherein: the slotting direction of the curve groove (616) is matched with the unfolding direction of the folding fan (503), and the twisting angle of the curve groove (616) is matched with the unfolding angle of the folding fan (503).

8. The photoelectric protection device with the quick response mechanism for the cold drink quick-freezing tunnel according to claim 6, wherein: the fixed end of the folding fan (503) is fixedly arranged on the mounting seat (501) through a clamping block, and the free end of the folding fan (503) is rotatably connected with the terminal of the swinging shaft (618).

9. The photoelectric protection device with a quick response mechanism for the cold drink quick-freezing tunnel according to claim 1, which is characterized in that: the radius of the folding fan (503) is larger than the linear distance from the proximity switch (502) to the folding fan (503).