Photoelectric protection device

Abstract

The utility model belongs to the technical field of safety protection equipment, and provides a photoelectric protection device which comprises a safety light curtain and a safety bracelet, the safety light curtain comprises a light curtain shell, a plurality of light emitting devices and light receiving devices are arranged in the light curtain shell, the safety bracelet comprises a bracelet body, and a light reflecting layer is arranged on the outer side of the bracelet body. The photoelectric protection device is simple in structure, when the photoelectric protection device is used, the safety light curtain is installed on workshop equipment, the safety bracelet is worn on the wrist of an operator, the life safety of the operator can be guaranteed in real time through the photoelectric protection device, safety protection on the operator is achieved, a more reliable safety barrier is provided for the operator, and the safety of the operator is guaranteed. The probability of accidents is greatly reduced, the working efficiency is greatly improved, safety monitoring is more humanized and intelligent, and a safer and more stable production environment can be created for enterprises.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety protection equipment, especially to a photoelectric protection device. BACKGROUND

[0002] Photoelectric protection device, also known as safety light curtain, safety light barrier or photoelectric protector, is an important safety protection equipment, mainly used in dangerous areas in industrial production to ensure the safety of operators.

[0003] The main components of photoelectric protection device include light emitter, light receiver, signal cable, controller and mounting bracket, etc. The light emitter emits several beams of infrared light, and the light receiver receives the infrared light from the light emitter, forming a rectangular detection light curtain. The whole light curtain detects in the way of scanning light beam by light beam. Any opaque object (such as part of the operator's body, opaque workpiece, etc.) larger than a certain size invading the light curtain area will cause light blocking. When the photoelectric protection device detects light blocking, it will enter the "abnormal" state within 20ms of response time - interrupt output, control equipment shutdown to achieve safety protection.

[0004] At present, photoelectric protection device usually includes a light emitter and a light receiver. The light emitter is mainly composed of several light emitting devices, which is responsible for emitting infrared light. These infrared lights form a protective light curtain net covering the area to be protected. The light receiver is composed of several light receiving devices, which is responsible for receiving the infrared light emitted by the light emitter. The light receiving devices of the light receiver correspond to the light emitting devices of the light emitter one by one, and together form a protective light curtain. When an object enters the protective net, the light receiver will immediately detect the change of light. However, the current photoelectric protection device gradually discovers the following defects during installation and use on open type rubber mixing machine and other equipment:

[0005] (1) When installing the device, it is necessary to ensure that the light emitter and the light receiver are aligned and kept on a horizontal plane, and the light emitter and the light receiver can cover all the areas to be protected. However, on the open type rubber mixing machine and other industrial equipment without installation conditions, it is difficult for the light emitter and the light receiver to meet the above installation conditions, and the installation difficulty is large and the safety protection effect is not ideal.

[0006] (2) It does not have the function of distinguishing the shielding object. Whether it is the operator's body or the workpiece invading the light curtain area, it will be detected by the device and then control the equipment to stop. However, during the normal operation of the equipment, it is inevitable that the workpiece will shield the light curtain net, which will cause the photoelectric protection device to trigger and control the equipment to stop. Frequent shutdown of the equipment will not only affect the processing efficiency of the workpiece, but also greatly reduce the service life of the equipment. If the photoelectric protection device is not installed, it will not play a protective role for the operator. CONTENT OF THE UTILITY MODEL

[0007] In order to overcome the above-mentioned defects of the prior art, in-depth research is made, and after a lot of creative labor is paid, the utility model is completed.

[0008] Specifically, the technical problem to be solved by the utility model is to provide an optoelectronic protection device to solve the technical problems that the current optoelectronic protection device is inconvenient to install and use, and cannot distinguish the limbs of an operator and provide targeted safety protection.

[0009] To solve the above technical problems, the technical scheme of the utility model is:

[0010] An optoelectronic protection device comprises a safety light curtain and a safety bracelet, the safety light curtain comprises a light curtain shell, a plurality of light emitting devices and light receiving devices are arranged in the light curtain shell, the safety bracelet comprises a bracelet body, and a reflective layer is arranged on the outer side of the bracelet body.

[0011] As an improved technical scheme, the light curtain shell comprises a shell, a filter is arranged on one side of the shell, end covers are fixedly arranged at both ends of the shell, a connector is arranged on one of the end covers, a keel frame is arranged in the shell, a circuit board is fixedly arranged on one side of the keel frame, the plurality of light emitting devices and the light receiving devices are arranged on the keel frame, and the plurality of light emitting devices and the light receiving devices are arranged towards the filter.

[0012] As an improved technical scheme, the plurality of light emitting devices and the light receiving devices are arranged in a linear array on the keel frame, and the plurality of light emitting devices and the light receiving devices are arranged alternately.

[0013] As an improved technical scheme, a convex lens is arranged on the keel frame, the convex lens is arranged on the side of the keel frame close to the filter, and the convex lens is arranged correspondingly to the light receiving devices;

[0014] Or, the convex lens is arranged correspondingly to the light emitting devices and the light receiving devices.

[0015] As an improved technical scheme, a light collecting member is further arranged on the keel frame, the light collecting member is arranged correspondingly to the light receiving devices, and the light collecting member is arranged between the light receiving devices and the convex lens;

[0016] The light collecting member has a light collecting hole, the inner hole wall of the light collecting hole is an inclined surface structure, and the aperture of the light collecting hole is arranged to be gradually widened along the direction close to the filter.

[0017] As an improved technical scheme, the keel frame is uniformly provided with a plurality of mounting grooves and clamping grooves along the length direction thereof, the light collecting members are respectively mounted in the mounting grooves, and the convex lenses are respectively mounted on the keel frame through the clamping grooves.

[0018] As an improved technical scheme, the bracelet body is a flexible body, and the two end portions of the bracelet body are detachably connected.

[0019] As an improved technical scheme, the inner side of the bracelet body is provided with a skin-adhesive layer, the reflective layer is correspondingly arranged and connected with the skin-adhesive layer, and the two end portions of the bracelet body are detachably connected through magic tapes.

[0020] As an improved technical scheme, the side end portion, away from the reflective layer, of the skin-adhesive layer is provided with a nap layer of the magic tape, the side end portion, away from the skin-adhesive layer, of the reflective layer is provided with a hook layer of the magic tape, and the nap layer and the hook layer are respectively arranged at the two end portions of the bracelet body.

[0021] As an improved technical scheme, the skin-adhesive layer, the reflective layer, the nap layer and the hook layer are sutured and connected.

[0022] And / or, the reflective layer is a polyester fiber reflective coating layer.

[0023] And / or, the reflective layer is provided with a plurality of reflective layers arranged in sequence.

[0024] After the above technical scheme is adopted, the beneficial effects of the present application are as follows.

[0025] (1) The photoelectric protection device has a simple structure, and when used, the safety light curtain is installed on the workshop equipment, and the safety bracelet is worn on the wrist of the operator. When working, the light emitting device of the safety light curtain emits a plurality of infrared rays or laser beams to form a protective light curtain net covering the area to be protected. When the workpiece enters the protective light curtain net, the light receiving device of the safety light curtain will not receive the light emitted by the light emitting device because the workpiece does not have light reflection function, and the equipment will not stop working normally. When the operator's limbs intrude into the protective light curtain net, the safety bracelet worn by the operator will reflect the light emitted by the light emitting device, and the light receiving device of the safety light curtain will receive the reflected light signal from the safety bracelet, indicating that the operator's limbs have entered the area covered by the protective light curtain net. The safety light curtain will feedback the detected signal in time, and immediately start the emergency braking device through the control system to control the equipment to stop working, so as to avoid potential accidents and prevent the operator from being injured and the occurrence of dangerous accidents.

[0026] Through the photoelectric protection device, the life safety of the operator can be ensured in real time, the safety protection of the operator is realized, a more reliable safety barrier is provided for the operator, the probability of accidents is greatly reduced, the work efficiency is greatly improved, safety monitoring is more humanized and intelligent, and a safer and more stable production environment can be created for enterprises.

[0027] (2) The safety light curtain is provided with a light emitting device and a light receiving device which are integrated and installed on the keel frame in the light curtain shell, so that the safety light curtain has the functions of emitting a light beam and receiving a light beam, compared with the traditional installation mode of ensuring that a light emitting device and a light receiving device are aligned and kept on a horizontal plane, the structure of integrating the light emitting device and the light receiving device on a safety light curtain makes the installation operation of the safety light curtain on the equipment simple and convenient.

[0028] (3) The light emitting device and the light receiving device are linearly arranged and staggered on the keel frame, which is more convenient for receiving the light beam, improves the detection sensitivity of the safety light curtain, and makes the safety light curtain have a long strip structure and a small volume.

[0029] (4) The convex lens installed on the keel frame can increase the light range emitted by the light emitting device, can increase the light receiving range of the light receiving device, so that the light is more easily received, and the detection of the safety light curtain is more sensitive.

[0030] (5) The light collecting piece installed on the keel frame can reduce the reception of stray light by the light receiving device, thereby avoiding that stray light at various angles triggers the safety light curtain and reduces the probability of false triggering.

[0031] (6) The safety bracelet is provided, which has a light structure and is extremely convenient to wear on the wrist of the operator, and the wearing and taking off operation is simple and convenient.

[0032] (7) The skin layer provided in the inner side of the bracelet body greatly improves the wearing comfort of the safety bracelet, the connection of the two end portions of the safety bracelet after winding is realized through the magic tape, the wearing of the safety bracelet is convenient, the use is convenient, and the size of the ring can be flexibly adjusted according to the thickness of the wrist of the operator, and the universality is high. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally indicated by similar reference numerals. In the drawings, various elements or parts are not necessarily drawn according to the actual scale.

[0034] Figure 1It is a three-dimensional structure schematic view of the photoelectric protection device of the utility model;

[0035] Figure 2 It is another three-dimensional structure schematic view of the photoelectric protection device of the utility model;

[0036] Figure 3 It is a structure schematic view of the safety light curtain of the utility model;

[0037] Figure 4 It is a structure schematic view of the safety bracelet in winding state of the utility model;

[0038] Figure 5 It is a three-dimensional structure schematic view of the safety bracelet in unwinding state of the utility model;

[0039] Figure 6 It is another three-dimensional structure schematic view of the safety bracelet in unwinding state of the utility model;

[0040] Figure 7 It is a side view structure schematic view of the safety bracelet in unwinding state of the utility model;

[0041] Figure 8 It is a three-dimensional structure schematic view of the convex lens and light collecting piece on the keel frame of the utility model;

[0042] Figure 9 It is another three-dimensional structure schematic view of the convex lens and light collecting piece on the keel frame of the utility model;

[0043] Figure 10 It is a structure schematic view of the keel frame of the utility model;

[0044] Figure 11 It is a structure schematic view of the light collecting piece of the utility model;

[0045] Figure 12 It is a sectional structure schematic view of the light collecting piece of the utility model;

[0046] The drawing mark: 1 - safety light curtain;11 - shell;12 - optical filter;13 - end cover;14 - connector;15 - keel frame;1501 - installation groove;1502 - clamping groove;16 - convex lens;17 - light collecting piece;2 - safety bracelet;21 - reflective layer;22 - skin layer;23 - velvet layer;24 - hook surface layer. DETAILED DESCRIPTION

[0047] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0048] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0049] Meanwhile, "and / or" or "and / or" appearing in the whole text means that three schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes are satisfied at the same time.

[0050] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0051] As Figures 1 to 12 The present embodiment provides a photoelectric protection device, which comprises a safety light curtain 1 and a safety bracelet 2. The safety light curtain 1 comprises a light curtain shell, and a plurality of light emitting devices and light receiving devices are arranged in the light curtain shell. The safety bracelet 2 comprises a bracelet body, and a reflective layer 21 is arranged on the outer side of the bracelet body.

[0052] In an embodiment, as Figures 1 to 3 , Figures 8 to 10As shown, the light curtain shell comprises a shell 11, one side of the shell 11 is provided with a filter 12, both ends of the shell 11 are fixedly provided with end covers 13, one of the end covers 13 is provided with a connector 14, a keel frame 15 is arranged in the shell 11, one side of the keel frame 15 is fixedly provided with a circuit board, a plurality of light emitting devices and light receiving devices are arranged on the keel frame 15, and the plurality of light emitting devices and light receiving devices are arranged towards the filter 12. The provided safety light curtain 1, the light emitting devices and the light receiving devices are integrated on the keel frame 15 in the light curtain shell, so that the safety light curtain 1 has the functions of emitting light beams and receiving light beams. Compared with the traditional installation mode of ensuring that one light emitting device and one light receiving device are aligned and kept on a horizontal plane, the structure of integrating the light emitting devices and the light receiving devices on one safety light curtain 1 makes the installation operation of the safety light curtain 1 of the device simple and convenient.

[0053] In an embodiment, as shown in Figures 8 to 10 As shown, the plurality of light emitting devices and light receiving devices are arranged in a linear array on the keel frame 15, and the plurality of light emitting devices and light receiving devices are arranged in turn and staggered. The linear array arrangement and staggered arrangement of the light emitting devices and the light receiving devices on the keel frame 15 make it easier to receive light beams and improve the detection sensitivity of the safety light curtain 1, and make the safety light curtain 1 have a long strip structure and a small volume.

[0054] In an embodiment, as shown in Figure 8 and Figure 9 As shown, the keel frame 15 is provided with a convex lens 16, and the convex lens 16 is located on one side of the keel frame 15 close to the filter 12.

[0055] In an embodiment, the light beams emitted by the light emitting devices of the safety light curtain 1 are laser beams, and the convex lens 16 is arranged corresponding to the light receiving devices.

[0056] In an embodiment, the light beams emitted by the light emitting devices of the safety light curtain 1 are infrared light beams, and the convex lens 16 is arranged corresponding to the light emitting devices and the light receiving devices.

[0057] The convex lens 16 arranged on the keel frame 15 can increase the range of light emitted by the light emitting devices, and can increase the receiving range of the light receiving devices, so that the light is more easily received, and the detection of the safety light curtain 1 is more sensitive.

[0058] In an embodiment, as shown in Figure 8 and Figure 9 As shown, the keel frame 15 is further provided with a light condensing member 17, the light condensing member 17 is arranged corresponding to the light receiving devices, and the light condensing member 17 is located between the light receiving devices and the convex lens 16; as shown in Figure 11 and Figure 12As shown, the light collector 17 has a light collecting hole, the inner hole wall of the light collecting hole is a sloping surface structure, and the aperture of the light collecting hole is gradually widened along the direction close to the filter 12. The light collector 17 mounted on the keel frame 15 can reduce the reception of stray light by the light receiving device, thereby avoiding the safety light curtain 1 being triggered by easily receiving stray light at various angles, and reducing the probability of false triggering.

[0059] As shown in Figures 8 to 10 As shown, in order to realize the installation of the light collector 17 and the convex lens 16 on the keel frame 15, a plurality of installation grooves 1501 and clamping grooves 1502 are uniformly arranged on the keel frame 15 along the length direction of the keel frame 15. The light collector 17 is respectively installed in the installation groove 1501, and the convex lens 16 is respectively installed on the keel frame 15 through the clamping groove 1502. The installation groove 1501 and the clamping groove 1502 provide convenience for the installation of the light collector 17 and the convex lens 16 on the keel frame 15.

[0060] In an embodiment, as shown in Figure 1 , Figure 2 and Figure 4 As shown, the bracelet body is a flexible body, and the two end portions of the bracelet body are detachably connected, thereby facilitating the wearing and taking off of the safety bracelet 2 on the wrist of the operator.

[0061] In an embodiment, as shown in Figures 4 to 7 As shown, the inner side of the bracelet body is provided with a skin layer 22, the reflective layer 21 is correspondingly arranged and connected with the skin layer 22, and the two end portions of the bracelet body are detachably connected through the magic tape. The skin layer 22 arranged on the inner side of the bracelet body greatly improves the wearing comfort of the safety bracelet 2. The connection of the two end portions of the safety bracelet 2 after winding is realized through the magic tape, so that the safety bracelet 2 is convenient to wear and use, and the size of the ring can be flexibly adjusted according to the thickness of the wrist of the operator, and the universality is strong.

[0062] In an embodiment, as shown in Figures 4 to 7 As shown, the side end portion of the skin layer 22 away from the reflective layer 21 is provided with a velvet layer 23 of the magic tape, the side end portion of the reflective layer 21 away from the skin layer 22 is provided with a hook layer 24 of the magic tape, and the velvet layer 23 and the hook layer 24 are respectively arranged at the two end portions of the bracelet body.

[0063] The safety bracelet 2 is provided with the structure, which is light and convenient to wear on the wrist of the operator, and is simple and convenient to wear and take off.

[0064] In an embodiment, the skin layer 22, the reflective layer 21, the velvet layer 23 and the hook layer 24 are stitched and connected, which is firm, reliable, soft and comfortable.

[0065] In an embodiment, the reflective layer 21 is a polyester fiber reflective coating; the polyester fiber reflective fabric is a fabric with excellent properties such as waterproofness, wear resistance, washability, pollution resistance, acid and alkali resistance, etc.

[0066] In an embodiment, the reflective layer 21 is provided with at least one strip. Figure 4 and Figure 5 As shown in the drawings, the reflective layer 21 can be provided with a plurality of strips, and the plurality of strips of the reflective layer 21 are arranged in sequence. Of course, the reflective layer 21 can also be provided as a whole.

[0067] Based on the above structure, the photoelectric protection device has a simple structure, when in use, the safety light curtain 1 is installed on the workshop equipment, and the safety bracelet 2 is worn on the wrist of the operator, during work, the light emitting device of the safety light curtain 1 emits a plurality of infrared rays or laser beams to form a protective light curtain net, covering the area to be protected, when the workpiece enters the protective light curtain net, since the workpiece does not have the light reflection function, the light receiving device of the safety light curtain 1 will not receive the light emitted by the light emitting device, and the equipment will not stop working normally, when the limbs of the operator intrude into the protective light curtain net, the safety bracelet 2 worn by the operator will reflect the light emitted by the light emitting device, and the light receiving device of the safety light curtain 1 will receive the light signal reflected from the safety bracelet 2, which represents that the limbs of the operator have entered the area covered by the protective light curtain net at this time, the safety light curtain 1 will feedback the detected signal in time, and immediately start the emergency braking device through the control system to control the equipment to stop working, so as to avoid the occurrence of potential accidents, thereby avoiding the injury of the operator and preventing the occurrence of dangerous accidents.

[0068] Through the photoelectric protection device, the life safety of the operator can be ensured in real time, the safety protection of the operator is realized, and a more reliable safety barrier is provided for the operator, which not only greatly reduces the probability of accidents and greatly improves the work efficiency, but also makes the safety monitoring more humanized and intelligent, and can create a safer and more stable production environment for enterprises.

[0069] It should be understood that the use of these embodiments is only for the purpose of illustrating the present application and is not intended to limit the protection scope of the present application. In addition, it should also be understood that after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A photovoltaic protection device, characterized in that, The safety light curtain comprises a light curtain shell, a plurality of light emitting devices and light receiving devices are arranged in the light curtain shell, and the safety bracelet comprises a bracelet body, and a reflective layer is arranged on the outer side of the bracelet body.

2. The photovoltaic protection device of claim 1, wherein, The light curtain shell comprises a shell, a filter is arranged on one side of the shell, end covers are fixedly arranged at both ends of the shell, a connector is arranged on one of the end covers, a keel frame is arranged in the shell, a circuit board is fixedly arranged on one side of the keel frame, a plurality of light emitting devices and light receiving devices are arranged on the keel frame, and the plurality of light emitting devices and light receiving devices are arranged towards the filter.

3. The photovoltaic protection device of claim 2, wherein, The plurality of light emitting devices and light receiving devices are arranged in a linear array on the keel frame, and the plurality of light emitting devices and light receiving devices are arranged in sequence and staggered.

4. The photovoltaic protection device of claim 3, wherein, A convex lens is arranged on the keel frame, the convex lens is arranged on the side of the keel frame close to the filter, and the convex lens is arranged corresponding to the light receiving devices respectively. Alternatively, the convex lens is arranged corresponding to the light emitting devices and the light receiving devices respectively.

5. The photovoltaic protection device of claim 4, wherein, A light collecting piece is further arranged on the keel frame, the light collecting piece is arranged corresponding to the light receiving devices respectively, and the light collecting piece is arranged between the light receiving devices and the convex lens. The light collecting piece has a light collecting hole, the inner hole wall of the light collecting hole is an inclined surface structure, and the aperture of the light collecting hole is gradually widened in the direction close to the filter.

6. The photovoltaic protection device of claim 5, wherein, A plurality of installation grooves and clamping grooves are uniformly arranged on the keel frame along the length direction of the keel frame, the light collecting pieces are arranged in the installation grooves respectively, and the convex lens is arranged on the keel frame through the clamping grooves.

7. The photovoltaic protection device according to any of claims 1-6, characterized in that, The bracelet body is a flexible body, and the two end portions of the bracelet body are detachably connected.

8. The photovoltaic protection device of claim 7, wherein, A skin layer is arranged on the inner side of the bracelet body, the reflective layer is arranged corresponding to the skin layer and is connected in a fit manner, and the two end portions of the bracelet body are detachably connected through magic tape.

9. The photovoltaic protection device of claim 8, wherein, The side end portion of the skin layer away from the reflective layer is provided with a nap layer of the magic tape, the side end portion of the reflective layer away from the skin layer is provided with a hook layer of the magic tape, and the nap layer and the hook layer are arranged on the two end portions of the bracelet body respectively.

10. The photovoltaic protection device of claim 9, wherein, The skin layer, the reflective layer, the nap layer and the hook layer are sutured and connected; And / or, the reflective layer is a polyester fiber reflective coating; And / or, the reflective layer is provided with a plurality of reflective layers arranged in sequence.

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