X-ray meat product foreign body detection device and detection method

Abstract

The present invention discloses an X-ray meat product foreign body detection device and a detection method, wherein the detection device comprises a conveying mechanism and an X-ray detector arranged on the conveying mechanism, and is characterized in that: the conveying mechanism comprises a first conveyor belt and a second conveyor belt which are distributed up and down, the rear part of the first conveyor belt is located above the front part of the second conveyor belt, and the rear part of the first conveyor belt and the front part of the second conveyor belt are both located inside the X-ray detector; two groups of symmetrical clamping devices are respectively arranged on the left and right sides of the rear part of the first conveyor belt, and each clamping device comprises a transmission belt mechanism and a plurality of clamping mechanisms assembled on the transmission belt mechanism. The present invention drives the object to be detected to enter the same X-ray in two states through the clamping device, so that the object to be detected is projected in two directions to form two complementary X-ray detection images, thereby solving the blind spot problem inherent in the single light source detection device and improving the accuracy of foreign body detection.

Description

Technical Field

[0001] The present invention relates to the technical field of foreign matter detection, and in particular to an X-ray meat product foreign matter detection device and a detection method. Background Art

[0002] In the production and processing of meat products, in order to ensure the safety and quality of food, foreign matter mixed in during the detection process has become an important issue that needs to be solved. With the increasing demand of consumers for food safety, the requirements for foreign matter detection equipment in the meat processing industry have also gradually increased. At present, X-ray detection equipment has become the mainstream technology for foreign matter detection in meat products due to its non-destructive, efficient and accurate detection capabilities.

[0003] However, in actual applications, the existing X-ray foreign body detection equipment for meat products still has many shortcomings that need to be improved. The detection structure of the existing X-ray foreign body detection machine is a top-illumination structure, with the X-ray light source at the top and the detector at the bottom. The material passes through the irradiation area, but when it encounters canned meat products, the edge area of ​​the material will be irradiated and imaged, which will form a superposition effect, affecting the imaging effect. The higher the material, the more obvious the effect, making it difficult to detect foreign objects at the edge of the material, thus causing missed detection.

[0004] Although there are multi-view X-ray detection equipment that can improve the accuracy of foreign body detection by taking X-ray images at multiple angles, this method requires enterprises to add multiple sets of X-ray detection equipment, which greatly increases the equipment investment cost and maintenance cost, resulting in a waste of resources. In addition, even if the current equipment can identify foreign bodies, it still cannot solve the problem of the difficulty of removing foreign bodies in the later stage. When an abnormality is detected, the conveyor belt of the existing equipment is reversed and stops transmission to prompt the staff to remove the abnormal meat products from the transmission system in time. This method of removing abnormal meat products is time-consuming and labor-intensive, and it is difficult to achieve automated, intelligent and efficient detection.

[0005] In summary, the existing X-ray meat foreign body detection equipment is unable to fully detect the objects to be tested when dealing with canned meat products, and there are obvious detection defects. How to improve the equipment's sensitivity to foreign body detection and remove abnormal objects has become an urgent problem that needs to be solved in the current meat foreign body detection technology. Summary of the invention

[0006] The object of the present invention is to provide an X-ray meat product foreign body detection device and a detection method to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an X-ray meat product foreign body detection device, comprising a conveying mechanism and an X-ray detector arranged on the conveying mechanism, wherein the conveying mechanism comprises a first conveyor belt and a second conveyor belt which are arranged in an upper and lower manner, the rear portion of the first conveyor belt is located above the front portion of the second conveyor belt, and the rear portion of the first conveyor belt and the front portion of the second conveyor belt are both located inside the X-ray detector;

[0008] Two groups of symmetrical clamping devices are respectively arranged on the left and right sides of the rear part of the first conveyor belt, each clamping device includes a transmission belt mechanism and a plurality of clamping mechanisms assembled on the transmission belt mechanism, the transmission belt mechanisms on both sides operate synchronously, the rear end of the transmission belt mechanism is located at the rear side of the rear end of the first conveyor belt, and each clamping mechanism is driven by the transmission belt mechanism to circulate along the same direction as the conveying direction of the first conveyor belt; the radiation source in the X-ray detection machine is arranged above the first conveyor belt, and the detector in the X-ray detection machine is arranged at an oblique lower rear side of the first conveyor belt. The X-rays emitted by the radiation source in the X-ray detection machine pass through the rear side of the first conveyor belt at a certain inclination angle and are received by the detector. The two parts of the X-rays located on the upper side and the rear side of the first conveyor belt respectively form two detection sections, and the clamping device is used to clamp and fix the object to be detected to pass through the two detection sections in sequence.

[0009] Furthermore, a foreign object marking mechanism is provided below the first conveyor belt, and the foreign object marking mechanism is located in front of the second conveyor belt, the entrance of the X-ray detection machine extends to the bottom of the first conveyor belt, and a collection box is provided at the lower part of the entrance side of the X-ray detection machine, the clamping mechanism clamps and fixes the unqualified inspected object, and after the foreign object position is marked by the foreign object marking mechanism, it is moved out of the entrance of the X-ray detection machine and thrown into the collection box.

[0010] Furthermore, the foreign body marking mechanism includes a fixed frame, a lifting assembly and a plurality of spraying assemblies arranged and assembled in the fixed frame; the lifting assembly includes a guide rod, a first screw rod and a motor, the guide rod and the first screw rod are respectively fixedly assembled on the left and right sides of the inner wall of the X-ray detection machine through a support, and the first screw rod is rotatably connected to the support and driven to rotate by the motor, one end of the fixed frame is slidably connected to the guide rod, and the other end is threadedly connected to the first screw rod; the spraying assembly includes a storage tank and a nozzle installed on the top of the storage tank, at least three storage chambers are arranged in the storage tank, and each storage chamber is used to store edible pigments of different colors, the top of each storage chamber is connected to a conduit, the other end of each conduit is respectively connected to the nozzle, and each conduit is installed with a micro pump for driving the edible pigment in the cavity to flow into the nozzle and spray out.

[0011] Furthermore, each of the clamping mechanisms includes a base, a connecting seat, a cylinder and at least one group of clamping members. The base is fixedly mounted on the surface of the transmission belt of the transmission belt mechanism, the connecting seat is slidably arranged on the top surface of the base through a slide rail, the cylinder is mounted on the side end of the base and its piston rod is connected to the connecting seat to drive it to move, and the clamping member is installed on the top of the connecting seat.

[0012] Furthermore, the clamping member includes a sliding rod, a sleeve, a supporting seat and a clamping seat, the supporting seat is installed on the connecting seat, the sleeve is arranged on the end surface of the connecting seat close to the first conveyor belt side, one end of the sliding rod is slidably arranged in the sleeve, and the clamping seat is assembled on the other end of the sliding rod, a spring is sleeved on the surface of the sliding rod and the two ends of the spring are respectively fixedly connected to the clamping seat and the supporting seat, a flexible block is connected to the middle of the end surface of the clamping seat close to the first conveyor belt side, and the flexible block is a tubular elastic structure connected by foldable corrugated sheets along the folding and telescopic direction.

[0013] Furthermore, a slot is provided on the top surface of the connecting seat, a bidirectional screw is rotatably arranged in the slot, two groups of clamping members are provided, the two groups are respectively slidably arranged in the slot and the bottoms of the two groups of clamping members are respectively threadedly connected to the two sides of the bidirectional screw, a knob is rotatably arranged on the side end of the connecting seat, and the knob shaft extends through and extends to the bidirectional screw connection.

[0014] Furthermore, the X-ray detection machine is provided with shielding curtains at the entrance parts on the upper and lower sides of the first conveyor belt. The upper shielding curtain is installed on the X-ray detection machine housing, and the lower shielding curtain is installed on the bottom ends of the two end brackets of the first conveyor belt. A second shielding curtain is installed at the exit of the X-ray detection machine.

[0015] A detection method based on the above-mentioned X-ray meat foreign body detection device comprises the following steps:

[0016] S1. Transport: The object to be detected is transported from the front side to the back side by the first conveyor belt and is identified by the sensor. The clamping mechanism moves to the position of the object to be detected under the drive of the transmission belt mechanism, and the two sides of the object to be detected are synchronously clamped by the clamping mechanisms on both sides;

[0017] S2. Detection: The clamping mechanism clamps the object to be detected and is driven by the transmission belt mechanism to be transported from the upper side to the lower side. During the transport process, the object to be detected passes through two detection sections in sequence, thereby projecting the object to be detected in two directions to form two complementary plane X-ray images;

[0018] S3, Sorting: The central control machine analyzes and processes the image and determines whether it contains foreign matter. Qualified products are released from the clamp and fall back onto the second conveyor belt for delivery, while unqualified products are continued to be clamped by the clamping mechanism and moved to the collection box for delivery.

[0019] Furthermore, in step S3, when the defective products are transported to the collection box, the foreign matter marking mechanism will directly spray edible coloring on the corresponding position on the surface of the defective products according to the location of the foreign matter analyzed by the central control machine for marking, and the foreign matter marking mechanism can directly spray edible coloring of different colors according to the size of the foreign matter for distinguishing marks.

[0020] Furthermore, before step S1, the clamping mechanism is also preset and adjusted. According to the size of the object to be detected, the knob is turned to rotate the bidirectional screw rod, thereby driving the two groups of clamping members thereon to move relative to each other to control the spacing position between the two groups of clamping members.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention uses a clamping device to drive the object to be detected to enter the same X-ray with a certain angle in two states, horizontally and vertically, respectively, and project the object to be detected in two directions, so as to form a plane X-ray image that is complementary on both sides, thereby improving the consistency and the imaging quality and imaging information. Compared with the existing single X-ray light source technology, the present invention can effectively eliminate the problem of blind spots in the detection of the side wall, bottom and top of canned meat products, and improve the accuracy of detection;

[0023] 2. The present invention can realize imaging detection of the detected object in different directions with only a single X-ray detector and an X-ray source, solving the problem of dual-viewing angle detection that requires two X-ray sources in the prior art, thereby reducing the cost of dual-viewing angle detection;

[0024] 3. The clamping device of the present invention works in conjunction with the foreign body marking mechanism. When an abnormality is found in a meat product, the meat product can be directly removed and the position of the foreign body can be marked to facilitate its later removal. The entire process does not require stopping the production line, thereby improving the detection efficiency. There is no need for manual operation, and the degree of automation is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of an X-ray meat product foreign body detection device of the present invention;

[0026] Figure 2 This is a front view of an X-ray meat product foreign body detection device of the present invention;

[0027] Figure 3 A top view of an X-ray meat product foreign body detection device according to the present invention;

[0028] Figure 4 This is a structural diagram of a conveying mechanism of an X-ray meat product foreign body detection device of the present invention;

[0029] Figure 5For the present invention Figure 4 A partial enlarged view of the middle part;

[0030] Figure 6 A schematic diagram of a foreign body marking mechanism of an X-ray meat product foreign body detection device of the present invention;

[0031] Figure 7 This is a structural diagram of a spraying component of an X-ray meat product foreign body detection device of the present invention;

[0032] Figure 8 This is a schematic diagram of two detections of an X-ray meat product foreign body detection device of the present invention.

[0033] In the figure, X-ray detection machine-1, first conveyor belt-2, second conveyor belt-3, transmission belt mechanism-4, clamping mechanism-5, radiation source-101, detector-102, foreign matter marking mechanism-6, collection box-7, fixing frame-61, lifting assembly-62, spraying assembly-63, guide rod-621, first screw rod-622, motor-623, storage tank-631, nozzle-632, storage cavity-633, catheter-634, micro pump-635, base-51, connecting seat-52, cylinder-53, clamping member-54, sliding rod-541, sleeve-542, supporting seat-543, clamping seat-544, spring-545, flexible block-546, slot-521, bidirectional screw rod-522, knob-523, shielding curtain-103, second shielding curtain-104. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, an X-ray meat product foreign body detection device includes a conveying mechanism and an X-ray detector 1 arranged on the conveying mechanism, the conveying mechanism includes a first conveyor belt 2 and a second conveyor belt 3 which are arranged in an upper and lower manner, the rear portion of the first conveyor belt 2 is located above the front portion of the second conveyor belt 3, and the rear portion of the first conveyor belt 2 and the front portion of the second conveyor belt 3 are both located inside the X-ray detector 1;

[0036] Two groups of symmetrical clamping devices are respectively arranged on the left and right sides of the rear part of the first conveyor belt 2, each clamping device includes a transmission belt mechanism 4 and a plurality of clamping mechanisms 5 assembled on the transmission belt mechanism 4, the transmission belt mechanisms 4 on both sides operate synchronously, the rear end of the transmission belt mechanism 4 is located at the rear side of the rear end of the first conveyor belt 2, and each clamping mechanism 5 is driven by the transmission belt mechanism 4 to circulate along the same direction as the conveying direction of the first conveyor belt 2; the ray source 101 in the X-ray detection machine 1 is arranged above the first conveyor belt 2, and the detector 102 in the X-ray detection machine 1 is arranged at the lower rear side of the first conveyor belt 2, the X-rays emitted by the ray source 101 in the X-ray detection machine 1 pass through the rear side of the first conveyor belt 2 at a certain inclination angle and are received by the detector 102, the two parts of the X-rays located on the upper side and the rear side of the first conveyor belt 2 respectively form two detection sections, and the clamping device is used to clamp and fix the object to be detected to pass through the two detection sections in sequence.

[0037] See also Figure 2 , Figure 6 and Figure 7 As shown, a foreign body marking mechanism 6 is provided below the first conveyor belt 2, and the foreign body marking mechanism 6 is located in front of the second conveyor belt 3, the entrance of the X-ray detector 1 extends to the bottom of the first conveyor belt 2, and a collection box 7 is provided at the lower part of the entrance side of the X-ray detector 1, the clamping mechanism 5 clamps and fixes the unqualified inspected object, passes it to the foreign body marking mechanism 6 to mark the position of the foreign object, and then moves it out of the entrance of the X-ray detector 1 and throws it into the collection box 7;

[0038] The foreign body marking mechanism 6 includes a fixed frame 61, a lifting assembly 62 and a plurality of spraying assemblies 63 arranged and assembled in the fixed frame 61; the lifting assembly 62 includes a guide rod 621, a first screw rod 622 and a motor 623, the guide rod 621 and the first screw rod 622 are respectively fixedly assembled on the left and right sides of the inner wall of the X-ray detection machine 1 through a support, and the first screw rod 622 is rotatably connected to the support and driven to rotate by the motor 623, one end of the fixed frame 61 is slidably connected to the guide rod 621, and the other end is slidably connected to the first screw rod 622 Threaded connection; the spraying assembly 63 includes a storage tank 631 and a nozzle 632 installed at the top of the storage tank 631. At least three storage chambers 633 are provided in the storage tank 631, and each storage chamber 633 is used to store edible pigments of different colors. The top of each storage chamber 633 is connected to a conduit 634, and the other end of each conduit 634 is connected to the nozzle 632, and each conduit 634 is installed with a micro pump 635 to drive the edible pigment in the chamber to flow into the nozzle 632 and spray out;

[0039] The edible pigments of different colors in each storage cavity 633 are used to correspond to foreign objects of different sizes. When a foreign object is detected, the clamping mechanism 5 will continue to clamp the unqualified product and transport it from the bottom of the first conveyor belt 2 to the collection box 7. When passing through the foreign object marking mechanism 6, the foreign object marking mechanism 6 first drives the first screw 622 to rotate through the motor 623 according to the received foreign object location information, thereby driving the fixed frame 61 to approach the unqualified product, and then the corresponding spraying assembly 63 arranged on the fixed frame 61 works. When the unqualified product moves from the location where the foreign object is to the top of the corresponding spraying assembly 63, the corresponding micro pump 635 in the spraying assembly 63 directly sprays the edible pigment of the corresponding color to the surface of the unqualified product to complete the marking;

[0040] The different color distinction marks help the staff to remove foreign objects in the later stage. The staff knows the size specifications of the foreign objects in advance and can find the foreign objects more quickly.

[0041] See also Figure 4 and Figure 5 As shown, each clamping mechanism 5 includes a base 51, a connecting seat 52, a cylinder 53 and at least one set of clamping members 54. The base 51 is fixedly mounted on the surface of the transmission belt of the transmission belt mechanism 4. The connecting seat 52 is slidably arranged on the top surface of the base 51 through a slide rail. The cylinder 53 is mounted on the side end of the base 51 and its piston rod is connected to the connecting seat 52 to drive it to move. The clamping member 54 is installed on the top of the connecting seat 52.

[0042] The clamping member 54 includes a slide bar 541, a sleeve 542, a support seat 543 and a clamping seat 544. The support seat 543 is installed on the connecting seat 52. The sleeve 542 is arranged on the end surface of the connecting seat 52 close to the first conveyor belt 2. One end of the slide bar 541 is slidably arranged in the sleeve 542. The clamping seat 544 is assembled on the other end of the slide bar 541. A spring 545 is sleeved on the surface of the slide bar 541, and the two ends of the spring 545 are respectively fixedly connected to the clamping seat 544 and the support seat 543. A flexible block 546 is connected to the middle of the end surface of the clamping seat 544 close to the first conveyor belt 2. The flexible block 546 is a tubular elastic structure connected by foldable corrugated sheets along the folding and telescopic direction.

[0043] The clamping action of the clamping member 54 is as follows: first, the piston rod of the cylinder 53 extends, driving the connecting seat 52 to move toward the first conveyor belt 2, so that the clamping member 54 thereon moves to contact the side wall of the object to be detected. After contact, the cylinder 53 continues to retract a certain distance, at which time the slide bar 541 is forced to retract into the sleeve 542 and compress the spring 545, and then the rebound force of the spring 545 is used to increase the clamping force, so that the flexible blocks 546 on both sides respectively abut against the two sides of the object to be detected to achieve clamping.

[0044] The flexible block 546 can be made of low-density plastics such as polystyrene and polyethylene. Since such materials have low absorption of X-rays, they can appear transparent or translucent in the image, so they will not block the object to be detected.

[0045] See also Figure 5 As shown, a slot 521 is provided on the top surface of the connecting seat 52, a bidirectional screw rod 522 is rotatably provided in the slot 521, two groups of clamping members 54 are provided, the two groups are respectively slidably provided in the slot 521, and the bottoms of the two groups of clamping members 54 are respectively threadedly connected to the two sides of the bidirectional screw rod 522, and a knob 523 is rotatably provided on the side end of the connecting seat 52, and the rotating shaft of the knob 523 extends through and is connected to the bidirectional screw rod 522;

[0046] Before work, the staff can turn the knob 523 to rotate the bidirectional screw 522 according to the size of the batch of objects to be inspected, thereby driving the two groups of clamping members 54 thereon to move relative to each other, to control the spacing position between the two groups of clamping members 54, and to ensure that the clamping members 54 can abut against the side of the objects to be inspected, so as to be suitable for stable clamping of objects to be inspected of different sizes.

[0047] See also Figure 1 and Figure 2 As shown, the entrance parts of the X-ray detection machine 1 located on the upper and lower sides of the first conveyor belt 2 are provided with shielding curtains 103, the upper shielding curtain 103 is installed on the shell of the X-ray detection machine 1, and the lower shielding curtain 103 is installed on the bottom ends of the two end brackets of the first conveyor belt 2. The installation of the lower shielding curtain 103 on the bracket of the conveyor belt will not affect the movement of the clamping assembly and the defective products clamped thereon. The exit of the X-ray detection machine 1 is equipped with a second shielding curtain 104, so as to completely shield the X-rays in the body and avoid the exposure of people outside the X-ray detection machine 1.

[0048] This embodiment also provides a detection method based on the above-mentioned X-ray meat product foreign body detection device, comprising the following steps:

[0049] S1. Transport: The object to be detected is transported from the front side to the rear side by the first conveyor belt 2 and is recognized by the sensor. The clamping mechanism 5 moves to the position of the object to be detected under the drive of the transmission belt mechanism 4, and the two sides of the clamping mechanism 5 are used to synchronously clamp the two sides of the object to be detected;

[0050] S2. Detection: The clamping mechanism 5 clamps the object to be detected and is driven by the transmission belt mechanism 4 to be transported from the upper side to the lower side. During the transport process, the object to be detected passes through two detection sections in sequence, so that the object to be detected is projected in two directions to form two complementary plane X-ray images;

[0051] See also Figure 8As shown, in the first detection section, the object to be detected is driven by the clamping mechanism 5 to be transported in the horizontal direction, and the object to be detected and the X-ray pass through at an angle of 45°. In the second detection section, the object to be detected is driven by the clamping mechanism 5 to be transported from a vertical state to a horizontal state. During the change of direction, the object to be detected and the X-ray pass through at an angle of 135°.

[0052] Therefore, the same X-ray can be used to perform imaging detection on the object to be inspected from two different radial directions, and two complementary planar X-ray images can be formed. Compared with the existing technology using a single X-ray light source, it can effectively eliminate the detection blind spots on the side walls, bottom and top of the inspected object and improve the accuracy of detection.

[0053] S3, sorting: The central control machine analyzes and processes the image and determines whether it contains foreign matter. Qualified products are released from the clamp and fall back into the second conveyor belt 3 to be sent out of the X-ray inspection machine 1. Unqualified products are continued to be clamped by the clamping mechanism 5 and moved to the collection box 7, where they are released and thrown in.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An X-ray meat product foreign body detection device, comprising a conveying mechanism and an X-ray detector arranged on the conveying mechanism, characterized in that: The conveying mechanism comprises a first conveying belt and a second conveying belt which are arranged vertically, the rear portion of the first conveying belt is located above the front portion of the second conveying belt, and the rear portion of the first conveying belt and the front portion of the second conveying belt are both located inside the X-ray detector; Two groups of symmetrical clamping devices are respectively arranged on the left and right sides of the rear part of the first conveyor belt, each clamping device includes a transmission belt mechanism and a plurality of clamping mechanisms mounted on the transmission belt mechanism, the transmission belt mechanisms on both sides operate synchronously, the rear end of the transmission belt mechanism is located at the rear side of the rear end of the first conveyor belt, and each clamping mechanism is driven by the transmission belt mechanism to circulate along the same direction as the conveying direction of the first conveyor belt; the radiation source in the X-ray detection machine is arranged above the first conveyor belt, and the detector in the X-ray detection machine is arranged obliquely below the rear side of the first conveyor belt, and the X-rays emitted by the radiation source in the X-ray detection machine penetrate the conveyor belt at a certain inclination angle. After passing through the rear side of the first conveyor belt, the X-ray is received by the detector. The two parts of the X-ray located on the upper side and the rear side of the first conveyor belt form two detection sections respectively, so as to project the inspected object in two directions. The clamping device is used to clamp and fix the inspected object to pass through the two detection sections in sequence. A foreign body marking mechanism is arranged under the first conveyor belt. During the first detection section, the object to be detected is driven by the clamping mechanism to be transported in the horizontal direction, and the object to be detected passes through at an angle of 45° with the X-ray. During the second detection section, the object to be detected is driven by the clamping mechanism to be transported from a vertical state to a horizontal state. During the change of direction, the object to be detected passes through at an angle of 135° with the X-ray. The foreign body marking mechanism is located in front of the second conveyor belt, the entrance of the X-ray detector extends to the bottom of the first conveyor belt, and a collection box is provided at the lower part of the entrance side of the X-ray detector. The clamping mechanism clamps and fixes the unqualified detected object, passes it to the foreign body marking mechanism to mark the position of the foreign object, and then moves it out of the entrance of the X-ray detector and throws it into the collection box; the foreign body marking mechanism includes a fixed frame, a lifting assembly and a plurality of spraying assemblies arranged and assembled in the fixed frame; the lifting assembly includes a guide rod, a first screw rod and a motor, and the guide rod and the first screw rod are respectively fixed by a support It is assembled on the left and right sides of the inner wall of the X-ray detection machine, and the first screw is rotatably connected to the support and driven to rotate by the motor. One end of the fixed frame is slidably connected to the guide rod, and the other end is threadedly connected to the first screw; the spray assembly includes a storage tank and a nozzle installed on the top of the storage tank. At least three storage chambers are arranged in the storage tank, and each storage chamber is used to store edible pigments of different colors. The top of each storage chamber is connected with a conduit, and the other end of each conduit is connected with the nozzle respectively, and each conduit is installed with a micro pump to drive the edible pigment in the cavity to flow into the nozzle and spray out.

2. The X-ray meat foreign body detection device according to claim 1, characterized in that: Each of the clamping mechanisms includes a base, a connecting seat, a cylinder and at least one group of clamping members. The base is fixedly mounted on the surface of the transmission belt of the transmission belt mechanism, the connecting seat is slidably arranged on the top surface of the base through a slide rail, the cylinder is mounted on the side end of the base and its piston rod is connected to the connecting seat to drive it to move, and the clamping member is installed on the top of the connecting seat.

3. The X-ray meat foreign body detection device according to claim 2, characterized in that: The clamping member includes a sliding rod, a sleeve, a supporting seat and a clamping seat, the supporting seat is installed on the connecting seat, the sleeve is arranged on the end surface of the connecting seat close to the first conveyor belt side, one end of the sliding rod is slidably arranged in the sleeve, and the clamping seat is assembled on the other end of the sliding rod, a spring is sleeved on the surface of the sliding rod and the two ends of the spring are respectively fixedly connected to the clamping seat and the supporting seat, a flexible block is connected to the middle of the end surface of the clamping seat close to the first conveyor belt side, and the flexible block is a tubular elastic structure connected by foldable corrugated sheets along the folding and telescopic direction.

4. The X-ray meat foreign body detection device according to claim 2, characterized in that: A slot is provided on the top surface of the connecting seat, and a bidirectional screw is rotatably arranged in the slot. Two groups of clamping members are provided, and the two groups are respectively slidably arranged in the slots and the bottoms of the two groups of clamping members are respectively threadedly connected to the two sides of the bidirectional screw. A knob is rotatably arranged on the side end of the connecting seat, and the knob shaft extends through and extends to the bidirectional screw for connection.

5. The X-ray meat foreign body detection device according to claim 1, characterized in that: The X-ray detection machine is provided with shielding curtains at the entrance parts on the upper and lower sides of the first conveyor belt. The upper shielding curtain is installed on the X-ray detection machine housing, and the lower shielding curtain is installed on the bottom ends of the two end brackets of the first conveyor belt. A second shielding curtain is installed at the exit of the X-ray detection machine.

6. A detection method based on the detection device according to claim 1, characterized in that: The steps include: S1. Transport: The object to be detected is transported from the front side to the back side by the first conveyor belt and is identified by the sensor. The clamping mechanism moves to the position of the object to be detected under the drive of the transmission belt mechanism, and the two sides of the object to be detected are synchronously clamped by the clamping mechanisms on both sides; S2. Detection: The clamping mechanism clamps the object to be detected and is driven by the transmission belt mechanism to be transported from the upper side to the lower side. During the transport process, the object to be detected passes through two detection sections in sequence, thereby projecting the object to be detected in two directions to form two complementary plane X-ray images; S3, Sorting: The central control machine analyzes and processes the image and determines whether it contains foreign matter. Qualified products are released from the clamp and fall back onto the second conveyor belt for delivery, while unqualified products are continued to be clamped by the clamping mechanism and moved to the collection box for delivery.

7. The detection method according to claim 6, characterized in that: In step S3, when the defective products are transported to the collection box, the foreign matter marking mechanism will directly spray edible pigments on the corresponding positions on the surfaces of the defective products according to the locations of the foreign matters analyzed by the central control machine for marking, and the foreign matter marking mechanism will directly spray edible pigments of different colors according to the size of the foreign matters for distinguishing the marks.

Images