Rapid determination device for nut allergens in baked food

Abstract

The invention discloses a rapid determination device for nut allergens in baked food, which comprises a standard sample dropping assembly, a conveying assembly, a reagent determination assembly and a standard sample transfer-out assembly, the input side and the output side of the conveying assembly are respectively provided with a standard sample dropping assembly, a reagent determination assembly and a standard sample transfer-out assembly; the standard sample dropwise adding assembly comprises a constant-temperature bin, a washing tank and a plurality of extracting solution storage tanks which are arranged in the constant-temperature bin, and a dropwise adding machine head arranged on the front side of the constant-temperature bin, protein extracting solutions of different types of nuts are stored in the extracting solution storage tanks, and a flow channel is formed in the upper side of the dropwise adding machine head; the flow channel is connected with the washing tank and the extracting solution storage tanks through a hose, a pump head and an electromagnetic valve, and different protein extracting solutions in the extracting solution storage tanks are output from the dripping machine head by the pump head. According to the invention, different reagents can be used for determination, the extraction liquid can be repeatedly and circularly determined, and the working procedures of experimenters are reduced.

Description

Technical Field

[0001] The invention relates to the field of nut allergen determination, and in particular to a device for rapid determination of nut allergens in baked foods. Background Art

[0002] Food allergies have become a food safety issue of common concern around the world. Allergens enter the food chain through various processing processes, causing allergic symptoms and acute and chronic diseases. It is difficult to completely remove allergens from food, which restricts the large-scale circulation of food and seriously threatens the health and interests of allergy sufferers.

[0003] With the improvement of people's living standards, baked goods are becoming more and more popular among consumers, especially children and adolescents in the growth and development stage. In the production process of baked goods, in addition to flour as the main raw material, a large number of exogenous raw materials (such as nuts, etc.) are also used. Various allergic reactions caused by this often occur. However, the tolerance of children and adolescents to allergic reactions is lower than that of adults, which must be given sufficient attention by relevant departments.

[0004] At present, allergen detection for nuts generally includes reagent method and mass spectrometry. Among them, mass spectrometry, such as "GB / T38163-2019 Determination of Common Allergenic Proteins by Liquid Chromatography-Tandem Mass Spectrometry", stipulates the liquid chromatography-tandem mass spectrometry determination and confirmation of milk, egg, soybean, peanut, hazelnut, almond and walnut allergenic proteins in solid food matrices containing wheat flour, oatmeal, cashews, cocoa powder, etc. The mass spectrometry method mainly uses mass spectrometry technology to study allergen proteins; while the reagent method uses reagents to determine the separated and extracted allergenic proteins, such as the enzyme-linked immunosorbent assay.

[0005] For the reagent method, the allergic protein needs to be extracted first and then measured by reagents. Currently, the laboratory relies on manual measurement by reagents. Since the test criteria and measurement reagents for different types of nuts are different, it is necessary to frequently switch the test instruments, and some measurement processes need to be repeatedly measured. Therefore, when measuring large-scale samples, the efficiency is low. Based on this, the present invention proposes a rapid measurement device for nut allergens in baked foods. This measurement device is mainly based on reagent protein detection. Standard samples (protein extracts) are added quantitatively and in batches in different containers bound with electronic tags, and transported to the lower side of the reagent measurement component. The reagent measurement component uses different reagents for measurement according to different types of nuts. The measurement of the extract can be repeated in a cycle, reducing the process of the experimenter. Summary of the invention

[0006] The purpose of the present invention is to provide a rapid determination device for nut allergens in baked foods, which can use different reagents for determination according to different types of nuts, can repeatedly cycle through the determination of extracts, and reduce the number of procedures for experimenters.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for rapid determination of nut allergens in baked food, comprising a standard sample dropping component, a conveying component, a reagent determination component and a standard sample transfer component, wherein the conveying component is a chain conveyor, a sample vessel is placed on the conveying component, and the input side and output side of the conveying component are respectively provided with a standard sample dropping component, a reagent determination component and a standard sample transfer component; the standard sample dropping component comprises a constant temperature chamber, a water washing tank and a plurality of extract storage tanks arranged in the constant temperature chamber, and a dropping machine head arranged at the front side of the constant temperature chamber, wherein the plurality of extract storage tanks store protein extracts of different types of nuts (the protein extract is obtained by crushing and mixing the baked food and then adding Tri s-HCl, and extracted in a 60°C water bath environment, and then centrifuged and passed through a membrane in sequence to obtain a protein extract). A flow channel is provided on the upper side of the dropping head, and the flow channel is connected to the water washing tank and the extract storage tank through a hose, a pump head, and a solenoid valve. The pump head outputs different types of protein extracts in multiple extract storage tanks from the dropping head.

[0008] Preferably, the conveying assembly includes a frame, a drive sprocket, a transmission sprocket, a reducer and a positioning rod, wherein the drive sprocket and the transmission sprocket are distributed on both sides of the frame, the drive sprocket is driven by the reducer, and the drive sprocket and the transmission sprocket are linked through a conveying chain, wherein the positioning rods are arranged at intervals along the length direction of the conveying chain.

[0009] Preferably, the sample vessel comprises a connecting end and a sample vessel body, wherein the connecting end can accommodate the sample vessel body, a constant temperature layer for heating / cooling / constant temperature of the sample vessel body is provided inside the connecting end, a groove body is provided at the bottom of the connecting end, and the groove body can cooperate with the positioning rod on the conveying chain, and the sample vessel can move with the conveying chain and output different types of protein extracts output by the dripping machine head to the reagent determination component. The sample vessel can be installed on the conveying chain through the positioning rod. Since the sample vessel body is mostly a test tube or some vessels, it is inconvenient to transport it, and some standard samples also need to be kept at a constant temperature / heated / cooled. Therefore, the present invention adopts the cooperation of the positioning rod and the connecting end to realize installation, so that transportation is convenient, and on the other hand, the constant temperature layer can be used to heat / cool / keep the standard sample at a constant temperature.

[0010] Preferably, an electronic tag is integrated in the connecting end on the bottom side of each sample vessel, and the standard sample dropping component and the reagent measuring component are equipped with an identifier for identifying the electronic tag. The standard sample dropping component quantitatively drops the specified nut protein extract based on the information of the electronic tag, and the standard sample dropping component quantitatively drops the specified reagent measuring solution based on the information of the electronic tag.

[0011] Preferably, the reagent measurement assembly includes an isolation cover, a reagent box, a cylinder and a reagent drip rack, wherein the isolation cover is installed on the upper side of the rack output end, the reagent box is installed on the top side of the isolation cover through a bracket, and the reagent box is provided with a plurality of measurement reagent compartments corresponding to different types of protein extracts, and the bottom sides of the plurality of reagent boxes are connected to the reagent drip rack through pipelines. The isolation cover is mainly used to isolate the reagent measurement area from the external area to prevent the external environment from affecting the measurement accuracy during the measurement, such as dust.

[0012] Preferably, a slide groove is provided at the bottom of the reagent box, and the reagent drip rack can be slidably connected with the slide groove, a cylinder is provided on the top side of the reagent drip rack to push it to move along the slide groove, and a plurality of drip heads corresponding to the measuring reagent compartment are provided at the bottom of the reagent drip rack. When the identifier of the reagent measuring component identifies the sample vessel carrying the corresponding electronic tag, the cylinder is controlled according to the electronic tag information to drive the reagent drip rack to move, so that the drip head corresponding to the reagent drip rack is facing the sample vessel, thereby completing the measuring reagent adding process.

[0013] Preferably, the standard sample transfer assembly is used to transfer the sample vessel after the reagent is added, and the standard sample transfer assembly includes a support plate, a track, a base, a gear travel module, a telescopic rod and a clamp arm module, wherein the support plate can be connected to the frame of the conveying assembly by bolts, and the track is installed on the support plate. A rack is arranged along the length direction of the track, and the base can be slidably connected to the track. The bottom side of the base is meshed with the rack through the gear travel module, and the base can be moved along the track through the gear travel module and approach the sample vessel to which the reagent is added.

[0014] Preferably, a telescopic rod is provided on the upper end surface of the base, and a clamping arm module is installed on the top of the telescopic rod. The clamping arm module includes a motor A, a bracket, a screw, a connecting rod and a swing clamping arm. The shaft end of the motor A is connected to the screw, and a bracket is provided on the screw. A hinge seat is provided at the front end of the screw; the connecting rod is hinged to both sides of the end of the bracket, and the end of the connecting rod is hinged to the swing clamping arm. The cross section of the swing clamping arm is a 7-shaped structure, and a clamping block is provided at the front end of the swing clamping arm. The middle of the swing clamping arm is connected to the hinge seat at the front end of the screw. After the base is close to the sample vessel, the screw can drive the swing clamping arm to swing through the hinge seat and clamp the sample vessel.

[0015] Preferably, the main purpose of the standard sample transfer component is to transfer the sample vessel after the reagent is added, so as to facilitate subsequent observation and measurement.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The measuring device of the present invention is mainly based on reagent protein detection. Standard samples (protein extracts) are added quantitatively and in batches to different containers bound with electronic tags, and transported to the lower side of the reagent measuring component. The reagent measuring component uses different reagents for measurement according to different types of nuts. The extract can be measured repeatedly to reduce the number of procedures for the experimenter.

[0018] 2. The standard sample dropping assembly and sample vessel of the present invention both adopt a constant temperature chamber or a constant temperature layer structure, and can be stored at a constant temperature or variable temperature according to the characteristics of the standard sample to improve the accuracy of subsequent measurements.

[0019] 3. The standard sample transfer component of the present invention can transfer the reagent after the reagent is dripped, and can use the electronic tag to identify the specific type of nuts, the standard sample, and the assay reagent that has been dripped. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the conveying chain and the positioning rod in the embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a standard sample dropping component in an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the partial structure of the reagent assay assembly of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the standard sample transfer assembly of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the clamping arm module in an embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the structure of the sample container in the embodiment of the present invention.

[0027] In the figure: 1. conveying assembly; 101. frame; 102. reducer; 103. conveyor chain; 104. positioning rod; 2. standard sample adding assembly; 201. constant temperature chamber; 202. adding head; 3. reagent measuring assembly; 301. isolation cover; 302. reagent box; 303. cylinder; 304. reagent dropping rack; 4. sample vessel; 401. connecting end; 402. sample vessel body; 5. standard sample transfer assembly; 501. support plate; 502. track; 503. base; 504. gear travel module; 505. telescopic rod; 506. motor A; 507. bracket; 508. screw; 509. connecting rod; 510. swing clamp arm; 511. hinged seat. DETAILED DESCRIPTION

[0028] 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.

[0029] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 on the present invention.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The present invention provides a technical solution: a rapid determination device for nut allergens in baked foods. The determination device is mainly based on reagent protein detection. Standard samples (protein extracts) are quantitatively and batchedly added to different containers bound with electronic tags, and the samples are transported to the lower side of a reagent determination component 3. The reagent determination component 3 uses different reagents for determination according to different types of nuts. The determination of the extract can be repeated in a cycle, reducing the number of procedures for the experimenter.

[0032] See also Figure 1 A rapid determination device for nut allergens in baked foods comprises a standard sample dropping component 2, a conveying component 1, a reagent determination component 3 and a standard sample transfer component 5, wherein the conveying component 1 is a chain conveyor, a sample vessel 4 is placed on the conveying component 1, and the standard sample dropping component 2, the reagent determination component 3 and the standard sample transfer component 5 are respectively arranged on the input side and the output side of the conveying component 1.

[0033] See also Figure 3The standard sample dropping component 2 includes a constant temperature chamber 201, a water washing tank and multiple extract storage tanks arranged in the constant temperature chamber 201, and a dropping head 202 arranged at the front side of the constant temperature chamber 201, wherein the multiple extract storage tanks store protein extracts of different types of nuts (the protein extract is obtained by grinding and mixing baked foods, adding Tris-HCl to mix, and extracting in a 60°C water bath environment, and then centrifuging and passing through a membrane in sequence). A flow channel is provided on the upper side of the dropping head 202, and the flow channel is connected to the water washing tank and the extract storage tank through a hose, a pump head, and a solenoid valve, and the different types of protein extracts in the multiple extract storage tanks are output by the dropping head 202 through the pump head.

[0034] See also Figure 1 , 2 In this embodiment, the conveying assembly 1 includes a frame 101, a driving sprocket, a transmission sprocket, a reducer 102 and a positioning rod 104, wherein the driving sprocket and the transmission sprocket are distributed on both sides of the frame 101, the driving sprocket is driven by the reducer 102, and the driving sprocket and the transmission sprocket are linked through a conveying chain 103, wherein the conveying chain 103 is provided with positioning rods 104 at intervals along its length direction.

[0035] See also Figure 1 , 7 In this embodiment, the sample vessel 4 includes a connection end 401 and a sample vessel body 402, wherein the connection end 401 can accommodate the sample vessel body 402, a constant temperature layer for heating / cooling / constant temperature of the sample vessel body 402 is provided inside the connection end 401, and a groove body is provided at the bottom of the connection end 401, and the groove body can cooperate with the positioning rod 104 on the conveying chain 103, and the sample vessel 4 can move with the conveying chain 103 and output different types of protein extracts output by the dripping head 202 to the reagent determination component 3. The sample vessel 4 can be installed on the conveying chain 103 through the positioning rod 104. Since the sample vessel body 402 is mostly a test tube or some vessels, it is inconvenient to transport it, and some standard samples also need to be kept at a constant temperature / heating / cooling. Therefore, the present invention uses the positioning rod 104 and the connection end 401 to achieve installation on the one hand, so that transportation is convenient, and on the other hand, the constant temperature layer can be used to heat / cool / constant temperature the standard sample.

[0036] In this embodiment, an electronic tag (not shown in the figure) is also integrated in the connection end 401 on the bottom side of each sample vessel 4, and an identifier (not shown in the figure) for identifying the electronic tag is installed on the standard sample dropping component 2 and the reagent measuring component 3. The standard sample dropping component 2 quantitatively adds the specified nut protein extract based on the information of the electronic tag, and the standard sample dropping component 2 quantitatively adds the specified reagent measuring solution based on the information of the electronic tag.

[0037] See also Figure 1 , 4In this embodiment, the reagent measuring assembly 3 includes an isolation cover 301, a reagent box 302, a cylinder 303 and a reagent drip rack 304, wherein the isolation cover 301 is installed on the upper side of the output end of the rack 101, and the reagent box 302 is installed on the top side of the isolation cover 301 through a bracket 507. The reagent box 302 is provided with a plurality of measuring reagent compartments corresponding to different types of protein extracts, and the bottom sides of the plurality of reagent boxes 302 are connected to the reagent drip rack 304 through pipelines. The isolation cover 301 is mainly used to isolate the reagent measuring area from the external area to prevent the external environment from affecting the measuring accuracy during the measuring, such as dust.

[0038] In this embodiment, a slide groove is arranged at the bottom of the reagent box 302, and the reagent drip rack 304 can be slidably connected with the slide groove. A cylinder 303 is arranged on the top side of the reagent drip rack 304 to push it to move along the slide groove. A plurality of drip heads corresponding to the measuring reagent bins are arranged at the bottom of the reagent drip rack 304. When the identifier of the reagent measuring component 3 identifies the sample vessel 4 carrying the corresponding electronic tag, the cylinder 303 is controlled according to the electronic tag information to drive the reagent drip rack 304 to move, so that the drip head corresponding to the reagent drip rack 304 is facing the sample vessel 4, thereby completing the measuring reagent adding process.

[0039] See also Figure 1 , 5 6. In this embodiment, the standard sample transfer assembly 5 is used to transfer the sample vessel 4 after the reagent is added. The standard sample transfer assembly 5 includes a support plate 501, a track 502, a base 503, a gear travel module 504, a telescopic rod 505 and a clamping arm module, wherein the support plate 501 can be connected with the frame 101 of the conveying assembly 1 by bolts, and the track 502 is installed on the support plate 501. The track 502 is provided with a rack along the length direction, and the base 503 can be slidably connected on the track 502. The bottom side of the base 503 is meshed with the rack through the gear travel module 504. The base 503 can be moved along the track 502 through the gear travel module 504 and approach the sample vessel 4 to which the reagent is added.

[0040] In this embodiment, a telescopic rod 505 is provided on the upper end surface of the base 503, and a clamping arm module is installed on the top of the telescopic rod 505. The clamping arm module includes a motor A506, a bracket 507, a screw 508, a connecting rod 509 and a swing clamping arm 510. The shaft end of the motor A506 is connected to the screw 508, and the bracket 507 is provided on the screw 508. A hinge seat 511 is provided at the front end of the screw 508; the connecting rod 509 is hinged to both sides of the end of the bracket 507, and the end of the connecting rod 509 is hinged to the swing clamping arm 510. The cross section of the swing clamping arm 510 is a 7-shaped structure, and a clamping block is provided at the front end of the swing clamping arm 510. The middle of the swing clamping arm 510 is connected to the hinge seat 511 at the front end of the screw 508. The screw 508 can drive the swing clamping arm 510 to swing and clamp the sample vessel 4 through the hinge seat 511 after the base 503 approaches the sample vessel 4.

[0041] In this embodiment, the standard sample transfer component 5 is mainly used to transfer the sample vessel 4 after the reagent is added, so as to facilitate subsequent observation and measurement.

[0042] It is worth noting that the entire device is controlled by a general control system. Since the equipment matched with the control system is commonly used equipment and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0043] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid determination device for nut allergens in baked food, characterized in that: The invention comprises a standard sample dropping component (2), a conveying component (1), a reagent measuring component (3) and a standard sample transferring component (5), wherein the conveying component (1) is a chain conveyor, a sample vessel (4) is placed on the conveying component (1), and the input side and the output side of the conveying component (1) are respectively provided with the standard sample dropping component (2), the reagent measuring component (3) and the standard sample transferring component (5); the standard sample dropping component (2) comprises a constant temperature chamber (201), a water washing tank and a plurality of extract storage tanks arranged in the constant temperature chamber (201), and a dropping machine head (202) arranged at the front side of the constant temperature chamber (201), wherein the plurality of extract storage tanks store protein extracts of different types of nuts, and a flow channel is arranged on the upper side of the dropping machine head (202), wherein the flow channel is connected to the water washing tank and the extract storage tank through a hose, a pump head and an electromagnetic valve, and the pump head outputs the different types of protein extracts in the plurality of extract storage tanks from the dropping machine head (202).

2. The device for rapid determination of nut allergens in baked food according to claim 1, characterized in that: The conveying assembly (1) comprises a frame (101), a driving sprocket, a transmission sprocket, a speed reducer (102) and a positioning rod (104), wherein the driving sprocket and the transmission sprocket are distributed on both sides of the frame (101), the driving sprocket is driven by the speed reducer (102), the driving sprocket and the transmission sprocket are linked via a conveying chain (103), wherein the conveying chain (103) is provided with positioning rods (104) at intervals along its length direction.

3. The device for rapid determination of nut allergens in baked food according to claim 1, characterized in that: The sample vessel (4) comprises a connecting end (401) and a sample vessel body (402), wherein the connecting end (401) can accommodate the sample vessel body (402), a constant temperature layer for heating / cooling / maintaining a constant temperature of the sample vessel body (402) is arranged on the inner side of the connecting end (401), a groove body is arranged at the bottom of the connecting end (401), and the groove body can cooperate with the positioning rod (104) on the conveying chain (103), and the sample vessel (4) can move with the conveying chain (103) and output different types of protein extracts output by the dripping head (202) to the reagent determination component (3).

4. The device for rapid determination of nut allergens in baked food according to claim 3, characterized in that: An electronic tag is also integrated in the connection end (401) on the bottom side of each sample vessel (4), and an identifier for identifying the electronic tag is installed on the standard sample dropping component (2) and the reagent measuring component (3). The standard sample dropping component (2) quantitatively drops a designated nut protein extract based on the information of the electronic tag, and the standard sample dropping component (3) quantitatively drops a designated reagent measuring solution based on the information of the electronic tag.

5. The device for rapid determination of nut allergens in baked food according to claim 1, characterized in that: The reagent assay assembly (3) comprises an isolation cover (301), a reagent box (302), a cylinder (303) and a reagent drip rack (304), wherein the isolation cover (301) is installed on the upper side of the output end of the rack (101), the reagent box (302) is installed on the top side of the isolation cover (301) via a bracket (507), a plurality of assay reagent compartments corresponding to different types of protein extracts are arranged in the reagent box (302), and the bottom sides of the plurality of reagent boxes (302) are connected to the reagent drip rack (304) via pipelines.

6. The device for rapid determination of nut allergens in baked food according to claim 5, characterized in that: A slide groove is arranged at the bottom of the reagent box (302), and the reagent dripping rack (304) can be slidably connected with the slide groove. A cylinder (303) is arranged on one side of the top of the reagent dripping rack (304) to push it to move along the slide groove. A plurality of dripping heads corresponding to the measuring reagent compartments are arranged at the bottom of the reagent dripping rack (304).

7. The device for rapid determination of nut allergens in baked food according to claim 1, characterized in that: The standard sample transfer assembly (5) is used to transfer the sample vessel (4) after the reagent is added. The standard sample transfer assembly (5) comprises a support plate (501), a track (502), a base (503), a gear travel module (504), a telescopic rod (505) and a clamping arm module, wherein the support plate (501) can be connected to the frame (101) of the conveying assembly (1) by bolts, and the track (502) is installed on the support plate (501).

8. The device for rapid determination of nut allergens in baked food according to claim 7, characterized in that: The track (502) is provided with a rack along the length direction, and a base (503) can be slidably connected to the track (502). The bottom side of the base (503) is meshed with the rack through a gear travel module (504). The base (503) can move along the track (502) and approach a sample vessel (4) to which a reagent is added through the gear travel module (504).

9. The device for rapid determination of nut allergens in baked food according to claim 8, characterized in that: A telescopic rod (505) is arranged on the upper end surface of the base (503), and a clamping arm module is installed on the top of the telescopic rod (505). The clamping arm module comprises a motor A (506), a bracket (507), a screw rod (508), a connecting rod (509) and a swinging clamping arm (510).

10. The device for rapid determination of nut allergens in baked food according to claim 9, characterized in that: The shaft end of the motor A (506) is connected to a screw rod (508), a bracket (507) is arranged on the screw rod (508), and a hinge seat (511) is arranged at the front end of the screw rod (508); the connecting rod (509) is hinged to both sides of the end of the bracket (507), and the end of the connecting rod (509) is hinged to a swing clamp arm (510), and a clamp block is arranged at the front end of the swing clamp arm (510), and the middle of the swing clamp arm (510) is connected to the hinge seat (511) at the front end of the screw rod (508).

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