Paper tube leakage alarm device based on light curtain sensor

Abstract

The utility model provides a paper tube leakage alarm device based on a light curtain sensor, which is used for detecting the sealing performance of a longitudinal seal of a paper tube, and comprises the light curtain sensor which comprises a first emitter and a first receiver which are arranged in parallel, a light curtain is formed between the first emitter and the first receiver, the tangential direction of the longitudinal seal along the paper tube is a first direction, and the light curtain is arranged opposite to the first direction; the receiving end of the signal amplifier is electrically connected with the signal output end of the light curtain sensor; the alarm module is electrically connected with the signal amplifier; and the power supply is used for supplying power to the signal amplifier and the alarm module. By arranging the light curtain sensor and the signal amplifier, when the light curtain sensor monitors an object passing signal and transmits the object passing signal to the signal amplifier through the electric wire, the alarm module is triggered to remind production personnel of leakage of the paper tube, and the purposes of rapidly detecting leakage of the paper tube and giving an alarm are achieved.

Description

Technical Field

[0001] The utility model relates to the field of production and processing of dairy products, dairy products and beverages, and specifically, to a paper tube leakage alarm device based on a light curtain sensor. Background Art

[0002] In the production and processing of dairy products and beverages, aseptic paper-based packaging materials must first be preformed into paper tubes, the contents are poured into the preformed paper tubes, and then transported to the gripper forming system for sealing and cutting to form the final single packages.

[0003] However, during the operation of paper tubes, if a paper tube leaks, it will contaminate the passage and cause the invasion of external microorganisms (corrupt bacteria and pathogenic bacteria), which will lead to the loss of batches of unqualified products. Therefore, how to quickly detect paper tube leakage and alarm has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a paper tube leakage alarm device based on a light curtain sensor.

[0005] The utility model provides a paper tube leakage alarm device based on a light curtain sensor, which is used to detect the sealing performance of a longitudinal seal of a paper tube. The paper tube leakage alarm device comprises:

[0006] A light curtain sensor, the light curtain sensor comprising a first transmitter and a first receiver arranged in parallel, a light curtain is formed between the first transmitter and the first receiver, the longitudinal seal along the tangent direction of the paper tube is a first direction, and the light curtain is arranged facing the first direction;

[0007] A signal amplifier, wherein a receiving end of the signal amplifier is electrically connected to a signal output end of the light curtain sensor;

[0008] an alarm module, the alarm module being electrically connected to the signal amplifier;

[0009] A power supply is used to supply power to the signal amplifier and the alarm module.

[0010] Beneficial effects:

[0011] The utility model sets a light curtain sensor and a signal amplifier, and sets the light curtain between the first transmitter and the first receiver along the tangent direction of the paper tube facing the longitudinal seal. When the paper tube leaks, the product content in the paper tube is splashed from the longitudinal seal under the action of the infusion pressure, and is blocked by the light curtain of the light curtain sensor. At this time, the light curtain sensor detects a signal of an object passing through, and transmits it to the signal amplifier through wires, thereby triggering an alarm module to quickly alarm and remind production personnel that the paper tube has leaked, thereby achieving the purpose of quickly detecting paper tube leakage and alarming.

[0012] Furthermore, the alarm module includes a controller and a buzzer, the detection end of the controller is electrically connected to the output end of the signal amplifier, and the control end of the controller is electrically connected to the buzzer.

[0013] Further, the alarm module includes a relay and an alarm light;

[0014] The first normally open contact of the relay is electrically connected to the positive pole of the power supply, the second normally open contact of the relay is electrically connected to the first end of the alarm light, the second end of the alarm light is electrically connected to the negative pole of the power supply, the first end of the coil of the relay is electrically connected to the output end of the signal amplifier, and the second end of the coil of the relay is electrically connected to the negative pole of the power supply.

[0015] Furthermore, the paper tube leakage alarm device also includes a reset button SW1, a first end of the reset button SW1 is connected to the positive pole of the power supply, and a second end of the reset button SW1 is connected to the first end of the coil of the relay.

[0016] Furthermore, the paper tube leakage alarm device also includes a rotating member, which is fixedly connected to the first transmitter and the first receiver respectively, so that the light curtain can be rotated and adjusted relative to the paper tube.

[0017] Furthermore, the paper tube leakage alarm device also includes a base and two connecting parts;

[0018] One end of one of the two connecting members is fixedly connected to the back of the first transmitter, and the other end is fixedly connected to the base; one end of the other connecting member is fixedly connected to the back of the first receiver, and the other end is also fixedly connected to the base;

[0019] The back side of the base facing away from the connecting member is fixedly connected to the rotating member.

[0020] Furthermore, the connecting member is a fixing bolt, and the first transmitter and the first receiver are both provided with threaded holes matched with the fixing bolt, or the base is provided with a threaded hole matched with the fixing bolt.

[0021] Further, the base includes a first fixing plate and a second fixing plate connected to each other, the first fixing plate and the second fixing plate are arranged at an angle, and the angle is 75° to 105°;

[0022] The light curtain sensor further includes a second transmitter and a second receiver which are arranged in parallel, the first transmitter and the first receiver are located on the first fixing plate, and the second transmitter and the second receiver are located on the second fixing plate.

[0023] Further, the base includes a first fixing plate and a second fixing plate connected to each other, the first fixing plate and the second fixing plate are arranged at an angle, and the angle is 75° to 105°;

[0024] The light curtain sensor further comprises a second receiver arranged in parallel, the first receiver is located at a position where the first fixing plate is away from the second fixing plate, the second receiver is located at a position where the second fixing plate is away from the first fixing plate, the first transmitter is located at a position where the first fixing plate and the second fixing plate are connected, and the first transmitter is respectively arranged in parallel with the first receiver and the second receiver, a first transmitting hole is arranged on a surface of the first transmitter opposite to the first receiver, and a second transmitting hole is arranged on a surface of the first transmitter opposite to the second receiver; or

[0025] The light curtain sensor also includes a second emitter arranged in parallel, the first emitter is located at a position where the first fixing plate is away from the second fixing plate, the second emitter is located at a position where the second fixing plate is away from the first fixing plate, the first receiver is located at a position where the first fixing plate and the second fixing plate are connected, and the first receiver is respectively arranged in parallel with the first emitter and the second emitter, a first receiving hole is arranged on a surface of the first receiver opposite to the first emitter, and a second receiving hole is arranged on a surface of the first receiver opposite to the second emitter.

[0026] Furthermore, a side of the first transmitter facing the first receiver is provided with a plurality of transmitting holes, and a side of the first receiver facing the first transmitter is provided with a plurality of receiving holes, and the transmitting holes and the receiving holes are arranged vertically and are arranged one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Figure 1 A structural schematic diagram of a paper tube leakage alarm device based on a light curtain sensor provided by the utility model;

[0029] Figure 2 A three-dimensional diagram of a paper tube leakage alarm device based on a light curtain sensor provided by the utility model;

[0030] Figure 3 for Figure 1 A structural schematic diagram of a light curtain sensor of a paper tube leakage alarm device based on a light curtain sensor is provided;

[0031] Figure 4 A schematic diagram of a module of a paper tube leakage alarm device based on a light curtain sensor provided by the utility model;

[0032] Figure 5 A partial circuit diagram of another paper tube leakage alarm device based on a light curtain sensor provided by the utility model.

[0033] Figure 6 A schematic diagram of the structure of another paper tube leakage alarm device based on a light curtain sensor provided by the utility model;

[0034] Figure 7 A schematic structural diagram of another paper tube leakage alarm device based on a light curtain sensor provided by the utility model.

[0035] In the figure: 10, paper tube; 101, longitudinal seal; 1, light curtain sensor; 11, first transmitter; 12, first receiver; 121, receiving hole; 13, second receiver; 14, second transmitter; 2, signal amplifier; 3, controller; 41, buzzer; 42, alarm light; 5, connector; 6, base; 61, first fixing plate; 62, second fixing plate; 7, rotating part; 8, power supply; 9, relay. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0039] In this specification, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] like Figure 1-5 As shown, the utility model provides a paper tube leakage alarm device based on a light curtain sensor, which is used to detect the sealing performance of the longitudinal seal 101 of the paper tube 10. The paper tube leakage alarm device includes:

[0042] A light curtain sensor 1, the light curtain sensor 1 comprises a first emitter 11 and a first receiver 12 arranged in parallel, a light curtain is formed between the first emitter 11 and the first receiver 12, the tangent direction of the longitudinal seal 101 along the paper tube 10 is a first direction, and the light curtain is arranged facing the first direction;

[0043] A signal amplifier 2, wherein a receiving end of the signal amplifier 2 is electrically connected to a signal output end of the light curtain sensor 1;

[0044] An alarm module, the alarm module is electrically connected to the signal amplifier 2;

[0045] The power supply 8 is used to supply power to the signal amplifier 2 and the alarm module.

[0046] In this embodiment, a light curtain sensor 1 and a signal amplifier 2 are arranged, and the light curtain between the first transmitter 11 and the first receiver 12 is arranged along the tangent direction of the paper tube 10 facing the longitudinal seal 101. When the paper tube 10 leaks, the product content in the paper tube 10 is splashed from the longitudinal seal under the action of the infusion pressure, and is thus blocked by the light curtain of the light curtain sensor 1. At this time, the light curtain sensor 1 detects a signal of an object passing through, and transmits it to the signal amplifier 2 through wires, thereby triggering the alarm module to quickly alarm and remind the production personnel that the paper tube 1 has leaked, thereby achieving the purpose of quickly detecting the leakage of the paper tube 1 and alarming.

[0047] Specifically, Figure 3 As shown, Figure 3 is one of the structures of the first transmitter 11 and the first receiver 12 in the light curtain sensor 1, such as Figure 2 As shown, the first transmitter 11 can emit light into the receiving hole 121 of the first receiver 12, thereby forming a mesh-shaped light curtain.

[0048] The alarm module may be in the form of a buzzer 41 or an alarm light 42 , or may have both a buzzer 41 and an alarm light 42 .

[0049] Specifically, Figure 4 As shown, the alarm module includes a controller 3 and a buzzer 41 . The detection end 31 of the controller 3 is electrically connected to the output end of the signal amplifier 2 , and the control end 32 of the controller 3 is electrically connected to the buzzer 41 .

[0050] When the paper tube 10 leaks, the product content in the paper tube 10 splashes under the effect of the infusion pressure, and passes through the light curtain sensor 1, the light curtain of the light curtain sensor 1 is blocked, and then the output is a signal of detecting that an object has passed, which is transmitted to the signal amplifier 2 through the cable, and the amplified signal, such as 24V, is transmitted to the controller 3 of the device. The controller 3 compiles a signal receiving and alarming program, and when the monitoring signal of the signal amplifier 2 is received, the buzzer 41 automatically alarms. Among them, the controller 3 is preferably a PLC controller.

[0051] Specifically, Figure 5 As shown, the alarm module includes a relay 9 and an alarm light 42; the first normally open contact of the relay 9 is electrically connected to the positive pole of the power supply 8, the second normally open contact of the relay 9 is electrically connected to the first end of the alarm light 42, the second end of the alarm light 42 is electrically connected to the negative pole of the power supply 8, the first end of the coil of the relay 9 is electrically connected to the output end of the signal amplifier 2, and the second end of the coil of the relay 9 is electrically connected to the negative pole of the power supply 8.

[0052] When the paper tube 10 leaks, the product content in the paper tube 10 splashes due to the filling pressure and passes through the corresponding light curtain sensor 1. The light curtain of the light curtain sensor 1 is blocked. At this time, the output detects that an object has passed and is transmitted to the signal amplifier 2 through the cable. The signal amplifier 2 outputs voltage to the coil of the relay 9. After the coil is energized, the normally open contact is closed, so that the alarm light 42 is energized and the alarm light lights up to complete the automatic alarm.

[0053] Specifically, the paper tube leakage alarm device further includes a reset button SW1 , a first end of the reset button SW1 is connected to the positive pole of the power supply 8 , and a second end of the reset button SW1 is connected to the first end of the coil of the relay 9 .

[0054] After the coil is energized and the alarm light 42 sounds, after the leaking paper tube 10 is replaced and the equipment is put into production again, the reset button SW1 can be pressed to check whether the entire equipment is normal. If the alarm light 42 is on when the reset button SW1 is pressed, and if the alarm light 42 is off when the reset button SW1 returns to its original position, then there is no problem with the relay 9 and the alarm light 42.

[0055] Preferably, the paper tube leakage alarm device further comprises a rotating member 7 , and the rotating member 7 is respectively fixedly connected to the first transmitter 11 and the first receiver 12 , so that the light curtain can be rotated and adjusted relative to the paper tube 10 .

[0056] Specifically, since the position of the longitudinal seal 101 of the paper tube 10 is not fixed each time, the paper tube leakage alarm device can be rotated so that the light curtain between the first transmitter 11 and the first receiver 12 is still set in the first direction. It is worth noting that during the rotation, the relative position between the first transmitter 11 and the first receiver 12 remains unchanged.

[0057] The rotating member 7 may be in the form of a rotating shaft.

[0058] Preferably, in order to provide a more stable rotating paper tube leakage alarm device, the paper tube leakage alarm device further includes a base 6 and two connecting members 5;

[0059] One end of one of the two connecting members 5 is fixedly connected to the back of the first transmitter 11, and the other end is fixedly connected to the base 6; one end of the other connecting member 5 is fixedly connected to the back of the first receiver 12, and the other end is also fixedly connected to the base 6;

[0060] The back side of the base 6 facing away from the connecting member 5 is fixedly connected to the rotating member 7 .

[0061] Specifically, the connecting member 5 is a fixing bolt, and the first transmitter 11 and the first receiver 12 are both provided with threaded holes matched with the fixing bolt, or the base 6 is provided with a threaded hole matched with the fixing bolt.

[0062] Among them, if the first transmitter 11 and the first receiver 12 are both provided with threaded holes compatible with the fixing bolts, the fixing bolts pass through the base 6 and are threadedly connected to the first transmitter 11 and the first receiver 12 to complete the fixation of the first transmitter 11 and the first receiver 12 to the base 6.

[0063] If the base 6 is provided with a threaded hole matched with the fixing bolt, the fixing bolt passes through the first transmitter 11 and the first receiver 12 and is threadedly connected to the base 6 , thereby completing the fixation of the first transmitter 11 and the first receiver 12 to the base 6 .

[0064] Preferably, Figure 2 and Figure 3 As shown, a plurality of transmitting holes are provided on a side of the first transmitter 11 facing the first receiver 12, and a plurality of receiving holes 121 are provided on a side of the first receiver 12 facing the first transmitter 11. The transmitting holes and the receiving holes 121 are arranged vertically, and the transmitting holes and the receiving holes 121 are arranged one by one.

[0065] Preferably, in order to form a denser light curtain, the transmitting holes and the receiving holes 121 are arranged in a staggered manner.

[0066] Preferably, if Figure 6 As shown, the base 6 comprises a first fixing plate 61 and a second fixing plate (62) connected to each other, the first fixing plate 61 and the second fixing plate 62 are arranged at an angle, and the angle is 75° to 105°;

[0067] The light curtain sensor 1 further comprises a second emitter 14 and a second receiver 13 which are arranged in parallel, wherein the first emitter 11 and the first receiver (12) are located on the first fixing plate (61), and the second emitter (14) and the second receiver (13) are located on the second fixing plate (62).

[0068] By adding the second transmitter 14 and the second receiver 13, and then by setting the angle of the base 6, and the first transmitter 11 and the second receiver 12 are respectively arranged on different fixed plates, so that the first light curtain formed by the first transmitter 11 and the second receiver 12, and the second light curtain formed by the second transmitter 14 and the second receiver 13 form a certain angle, which can cover the first direction of the longitudinal seal 101 and the other direction opposite to the first direction, thereby making the leakage device more sensitive and accurate, and when one pair is damaged, the other pair can also ensure the normal use of the equipment, and when a leakage is detected, only one pair of light curtains reacts, then it can be detected whether the other pair of light curtains is damaged, so as to achieve the effect of maintenance. In addition, the setting of the second pair of light curtains in this embodiment is also helpful for leakage detection at the straw mouth position of the paper tube 10, so as to achieve the effect of all-round protection.

[0069] Preferably, if Figure 7 As shown, the base 6 includes a first fixing plate 61 and a second fixing plate 62 connected to each other, and the first fixing plate 61 and the second fixing plate 62 are arranged at an angle, and the angle is 75° to 105°;

[0070] The light curtain sensor 1 further includes a second receiver 13 arranged in parallel, the first receiver 12 is located at a position where the first fixing plate 61 is away from the second fixing plate 62, the second receiver 13 is located at a position where the second fixing plate 62 is away from the first fixing plate 61, the first transmitter 11 is located at a position where the first fixing plate 61 and the second fixing plate 62 are connected, and the first transmitter 11 is arranged in parallel with the first receiver 12 and the second receiver 13, respectively, the first transmitter 11 is provided with a first transmitting hole on a surface opposite to the first receiver 12, and the first transmitter 11 is provided with a second transmitting hole on a surface opposite to the second receiver 13. The above arrangement can save one transmitter.

[0071] Of course, you can also choose to save one receiver. Specifically, the light curtain sensor 1 also includes a second transmitter 14 arranged in parallel, the first transmitter 11 is located at a position where the first fixing plate 61 is away from the second fixing plate 62, the second transmitter 14 is located at a position where the second fixing plate 62 is away from the first fixing plate 61, the first receiver 12 is located at the connecting position of the first fixing plate 61 and the second fixing plate 62, and the first receiver 12 is respectively arranged in parallel with the first transmitter 11 and the second transmitter 14, a first receiving hole is arranged on the surface of the first receiver 12 opposite to the first transmitter 11, and a second receiving hole is arranged on the surface of the first receiver 12 opposite to the second transmitter 14.

[0072] It should be noted that the terms "horizontal", "vertical" and the like do not mean that the components are absolutely horizontal or vertical, but can be slightly tilted; the terms "parallel", "vertical" and the like do not mean that the components are absolutely parallel or vertical, but can form a certain angle deviation. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In addition, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed when used, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0073] It is to be understood that the meaning of "plurality" herein is at least two, such as two, three, etc., unless there is a special limitation. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. The term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0074] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A paper tube leakage alarm device based on a light curtain sensor, used for detecting the sealing performance of a longitudinal seal (101) of a paper tube (10), characterized in that: The paper tube leakage alarm device comprises: A light curtain sensor (1), the light curtain sensor (1) comprising a first transmitter (11) and a first receiver (12) arranged in parallel, a light curtain being formed between the first transmitter (11) and the first receiver (12), the longitudinal seal (101) being in a tangent direction along the paper tube (10) as a first direction, and the light curtain being arranged facing the first direction; A signal amplifier (2), a receiving end of the signal amplifier (2) being electrically connected to a signal output end of the light curtain sensor (1); An alarm module, the alarm module being electrically connected to the signal amplifier (2); A power supply (8) is used to supply power to the signal amplifier (2) and the alarm module.

2. According to claim 1, a paper tube leakage alarm device based on a light curtain sensor is characterized in that: The alarm module comprises a controller (3) and a buzzer (41), wherein the detection end (31) of the controller (3) is electrically connected to the output end of the signal amplifier (2), and the control end (32) of the controller (3) is electrically connected to the buzzer (41).

3. According to claim 1, a paper tube leakage alarm device based on a light curtain sensor is characterized in that: The alarm module comprises a relay (9) and an alarm light (42); The first normally open contact of the relay (9) is electrically connected to the positive electrode of the power supply (8), the second normally open contact of the relay (9) is electrically connected to the first end of the warning light (42), the second end of the warning light (42) is electrically connected to the negative electrode of the power supply (8), the first end of the coil of the relay (9) is electrically connected to the output end of the signal amplifier (2), and the second end of the coil of the relay (9) is electrically connected to the negative electrode of the power supply (8).

4. According to claim 3, a paper tube leakage alarm device based on a light curtain sensor is characterized in that: The paper tube leakage alarm device further comprises a reset button SW1, a first end of the reset button SW1 being connected to the positive electrode of the power source (8), and a second end of the reset button SW1 being connected to the first end of the coil of the relay (9).

5. The paper tube leakage alarm device based on a light curtain sensor according to claim 1, characterized in that: The paper tube leakage alarm device further comprises a rotating member (7), wherein the rotating member (7) is fixedly connected to the first transmitter (11) and the first receiver (12) respectively, so that the light curtain can be rotated and adjusted relative to the paper tube (10).

6. A paper tube leakage alarm device based on a light curtain sensor according to claim 5, characterized in that: The paper tube leakage alarm device also includes a base (6) and two connecting parts (5); One end of one of the two connecting members (5) is fixedly connected to the back of the first transmitter (11), and the other end is fixedly connected to the base (6); one end of the other connecting member (5) is fixedly connected to the back of the first receiver (12), and the other end is also fixedly connected to the base (6); The back side of the base (6) facing away from the connecting member (5) is fixedly connected to the rotating member (7).

7. A paper tube leakage alarm device based on a light curtain sensor according to claim 6, characterized in that: The connecting member (5) is a fixing bolt, and the first transmitter (11) and the first receiver (12) are both provided with a threaded hole matched with the fixing bolt, or the base (6) is provided with a threaded hole matched with the fixing bolt.

8. The paper tube leakage alarm device based on a light curtain sensor according to claim 6, characterized in that: The base (6) comprises a first fixing plate (61) and a second fixing plate (62) which are connected to each other, the first fixing plate (61) and the second fixing plate (62) being arranged at an angle, the angle being 75° to 105°; The light curtain sensor (1) further comprises a second transmitter (14) and a second receiver (13) arranged in parallel, the first transmitter (11) and the first receiver (12) being located on the first fixing plate (61), and the second transmitter (14) and the second receiver (13) being located on the second fixing plate (62).

9. The paper tube leakage alarm device based on a light curtain sensor according to claim 6, characterized in that: The base (6) comprises a first fixing plate (61) and a second fixing plate (62) which are connected to each other, the first fixing plate (61) and the second fixing plate (62) being arranged at an angle, the angle being 75° to 105°; The light curtain sensor (1) further comprises a second receiver (13) arranged in parallel, the first receiver (12) being located at a position where the first fixing plate (61) is away from the second fixing plate (62), the second receiver (13) being located at a position where the second fixing plate (62) is away from the first fixing plate (61), the first transmitter (11) being located at a position where the first fixing plate (61) and the second fixing plate (62) are connected, and the first transmitter (11) being arranged in parallel with the first receiver (12) and the second receiver (13), a first transmitting hole being arranged on a surface of the first transmitter (11) opposite to the first receiver (12), and a second transmitting hole being arranged on a surface of the first transmitter (11) opposite to the second receiver (13); or The light curtain sensor (1) further comprises a second transmitter (14) arranged in parallel, the first transmitter (11) being located at a position where the first fixing plate (61) is away from the second fixing plate (62), the second transmitter (14) being located at a position where the second fixing plate (62) is away from the first fixing plate (61), the first receiver (12) being located at a position where the first fixing plate (61) and the second fixing plate (62) are connected, and the first receiver (12) being arranged in parallel with the first transmitter (11) and the second transmitter (14), respectively, a first receiving hole being arranged on a surface of the first receiver (12) opposite to the first transmitter (11), and a second receiving hole being arranged on a surface of the first receiver (12) opposite to the second transmitter (14).

10. The paper tube leakage alarm device based on a light curtain sensor according to claim 1, characterized in that: A plurality of transmitting holes are provided on a side of the first transmitter (11) facing the first receiver (12), and a plurality of receiving holes (121) are provided on a side of the first receiver (12) facing the first transmitter (11), wherein the transmitting holes and the receiving holes (121) are arranged vertically, and the transmitting holes and the receiving holes (121) are arranged in a one-to-one correspondence.

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