CN210981450U

CN210981450U - Calibration device

Info

Publication number: CN210981450U
Application number: CN201921705637.5U
Authority: CN
Inventors: 吉宁
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-07-10
Anticipated expiration: 2029-10-12

Abstract

The utility model provides a calibration device, which comprises a fixing piece, a tray component and a connecting part fixedly connected with the fixing piece; the fixing piece is provided with an accommodating space extending along the vertical direction, the tray assembly is fixed in the accommodating space and comprises a plurality of tray bodies arranged at intervals along the vertical direction, and each tray body is provided with an accommodating cavity for accommodating the weight; the central lines of the plurality of accommodating cavities in the tray assembly are overlapped and extend along the vertical direction. The utility model discloses a with the design of a plurality of tray bodies, all place a weight at every tray body, guaranteed that the weight coincides with the focus of tray body to the central line of every tray body coincides, then also can guarantee that the focus of a plurality of weights also lies in same straight line, avoid the problem that the inspection error that a plurality of weights focus does not coincide and cause is big like this; moreover, a plurality of tray bodies are fixed on the fixing piece, so that the stability of the checking device can be improved, and the tray bodies are prevented from shaking.

Description

Calibration device

Technical Field

The utility model relates to a check out test set technical field especially relates to a calibration equipment for flotation pontoon level gauge.

Background

Float level gauges are commonly used in closed containers to measure the liquid level change of a medium, and the float level gauges include a float, a lever connected with the float, a torque tube and a sensor, wherein the other end of the lever is connected with the torque tube, and the sensor can detect the change of torque on the torque tube.

Among the prior art, the calibration equipment includes tray and sling chain, and the one end and the tray of sling chain are connected, and the other end is connected with the torsion tube of flotation pontoon level gauge, and the inspection calibration in-process changes the weight of calibration equipment through adding the weight to adding on the tray for the torsion tube takes place to rotate, and then comes the change of detection torque through the sensor on the flotation pontoon level gauge, realizes the calibration to the flotation pontoon level gauge.

However, the center of gravity of the weights does not coincide with the center of gravity of the tray, so that the tray is inclined, and the calibration error is increased.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a calibration equipment to the focus of solving a plurality of weights among the prior art does not coincide with the focus of tray, causes the tray to take place to incline, technical problem that the calibration error is big.

An embodiment of the utility model provides a calibration equipment, including mounting, tray assembly and with mounting fixed connection's connecting portion.

Have on the mounting along vertical extension's accommodation space, tray assembly fixes in the accommodation space, tray assembly includes along a plurality of tray body of vertical interval setting, every tray body has a chamber that holds that is used for holding the weight.

The central lines of the plurality of accommodating cavities in the tray assembly are overlapped and extend along the vertical direction.

The connecting part is used for being connected with the float level meter.

The checking device as described above, wherein the fixing member includes a vertically extending cylinder, and a plurality of the tray bodies are vertically spaced apart on an inner surface of the cylinder.

The tray comprises a tray body and is characterized in that a placing opening extending vertically is formed in the barrel, and the placing opening is used for placing weights into each tray body.

The checking device as described above, wherein the accommodating cavity comprises a vertically extending cylindrical accommodating portion for bearing a weight.

The checking device as described above, wherein the number of the accommodating portions is plural, the plural accommodating portions are connected in sequence along the vertical direction, and center lines of the plural accommodating portions coincide with each other; and taking a plane vertical to the vertical direction as a cross section, wherein the cross section area of the plurality of accommodating parts is gradually increased along the vertical direction from bottom to top.

The verification device as described above, wherein a plurality of the tray bodies are welded on the inner surface of the cylinder.

The calibration device as described above, wherein the cylinder is provided with an arc cover, and the connecting portion is provided on the arc cover.

The calibration device as described above, wherein the connection portion includes a hook body and a connection rod connected to the hook body, and one end of the connection rod close to the cylinder body is fixed to the arc-shaped cover.

The calibration device as described above, wherein the plurality of tray bodies divide the barrel into the installation sections which are connected in sequence along the vertical direction, and each installation section is provided with one identification portion.

The verification device as described above, wherein the identification portion includes a card slot disposed on the mounting section and a tag disposed in the card slot.

The checking device as described above, wherein the distance between adjacent tray bodies is 55-65 mm.

The embodiment of the utility model provides a calibration device, which comprises a fixing part, a tray component and a connecting part fixedly connected with the fixing part; the fixing piece is provided with a containing space extending along the vertical direction, the tray assembly is fixed in the containing space and comprises a plurality of tray bodies arranged at intervals along the vertical direction, and each tray body is provided with a containing cavity for containing a weight; the central lines of the plurality of accommodating cavities in the tray assembly are overlapped and extend along the vertical direction. The embodiment of the utility model provides a through with the design of a plurality of tray bodies, all place a weight at every tray body, guaranteed that the weight coincides with the focus of tray body to the central line of every tray body coincides, then also can guarantee that the focus of a plurality of weights also lies in same straight line, avoid the problem that the inspection error is big that a plurality of weights focus do not coincide like this; moreover, a plurality of tray bodies are fixed on the fixing piece, so that the stability of the checking device can be improved, and the tray bodies are prevented from shaking.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a calibration device provided by the present invention;

fig. 2 is a top view of the tray body provided by the present invention;

fig. 3 is a front view of the tray body provided by the present invention.

Description of reference numerals:

10: a fixing member;

20: a tray body;

201: an accommodating chamber;

202: an accommodating portion;

30: a connecting portion;

301: a hook body;

302: a connecting rod;

40: a placement port;

50: an arc-shaped cover;

60: a marking part;

70: a zipper.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The float level gauge is commonly used in the liquid level change of airtight container measurement medium, the float level gauge includes interior barrel and sets up at internal barrel lever, torque tube and sensor, the float and the lever of being connected with the float, torque tube and sensor, wherein the other end of lever is in the same place with torque tube vertical connection, the sensor can detect the change of moment on the torque tube, when the height of liquid level needs to be detected, pass through the zip fastener at the other end of lever and connect the float, and place the float to detect the liquid level of examining, when the float receives buoyancy, the produced moment of torque tube can change, can detect the change of moment and convert into relevant signal through the sensor and export. In industrial production, the liquid level value measured by the float level meter is usually used as the basis for the adjustment process, and therefore, the precision of the float level meter needs to be checked to ensure the accuracy of the measured data.

Because the focus of a plurality of weights does not coincide with the focus of tray, causes the tray to take place to incline, technical problem that the check-up error is big, this embodiment provides a calibration equipment.

Fig. 1 is a schematic structural diagram of a calibration device provided by the present invention; fig. 2 is a top view of the tray body provided by the present invention; fig. 3 is a front view of the tray body provided by the present invention.

Referring to fig. 1 to 3, an embodiment of the present invention provides a calibration apparatus, which includes a fixing member 10, a tray assembly, and a connecting portion 30 fixedly connected to the fixing member 10.

Be formed with along vertical extension's accommodation space on the mounting 10, the tray subassembly is fixed in accommodation space, and the tray subassembly includes a plurality of tray body 20 along vertical interval setting, and every tray body 20 has one and is used for holding chamber 201 that holds of weight.

The center lines of the plurality of accommodating cavities 201 in the tray assembly coincide and extend in the vertical direction.

Specifically, the calibration device can be used for calibrating the precision of the float level meter, the calibration device replaces a float structure of the float level meter, the buoyancy of the float in the liquid to be measured is simulated by increasing or decreasing the weight of the calibration device, and the accuracy of the float level meter is calibrated.

The calibration device may include a fixing member 10, where the fixing member 10 is used as a main structure of the calibration device and may be used to fix a tray assembly or other components, where the shape of the fixing member 10 may be selected variously, for example, a receiving space extending in a vertical direction is formed on the fixing member 10, that is, the fixing member 10 may be a hollow cylinder, and the tray assembly is fixed in the cylinder; for another example, the fixing element 10 may be a plurality of fixing columns or fixing plates distributed at intervals along the circumferential direction of the tray assembly, the fixing columns are all fixedly connected to the outer surface of the tray assembly, a placing opening 40 for placing a weight may be formed between adjacent fixing columns, when the fixing element 10 is a fixing plate, a placing opening 40 for placing a weight may be formed between adjacent fixing plates, and the number of the fixing columns and the number of the fixing plates may be freely selected according to actual conditions.

The fixing piece and the tray component can be connected in a conventional fixing connection mode, such as welding; the connection can also be realized through detachable connection modes such as clamping connection or screw connection.

In addition, the calibration apparatus further includes a connection portion 30 fixedly connected to the fixing member 10, where the connection portion 30 is used for being connected to the float level meter, and it can be understood that the fixed connection between the fixing member 10 and the connection portion 30 means that the fixing member 10 and the connection portion 30 do not move relatively in the use process, where the fixing member 10 and the connection portion 30 may be directly and fixedly connected or indirectly and, for example, a cover body is disposed on the fixing member 10, and the connection portion 30 may be fixed on the cover body to achieve indirect fixed connection between the connection portion 30 and the fixing member 10.

The tray subassembly can fixed connection on mounting 10 for place the weight to the buoyancy that the simulation flotation pontoon received in waiting to detect liquid, the tray subassembly includes tray body 20 along a plurality of tray bodies that vertical interval set up, and in addition, tray body 20's shape can multiple selection, for example circular, square or oval.

Furthermore, every tray body 20 has one and is used for holding chamber 201 that holds of weight, a plurality of central lines coincidence that hold chamber 201 among the tray subassembly, and this central line is along vertical extension, the shape and the volume that hold chamber 201 can set up according to the size of actual weight, for example, the shape that holds chamber 201 can be for circular, square or oval, preferably, the shape that holds chamber 201 is circular, the inner wall that holds chamber 201 like this can coincide with the surface of weight, increase the steadiness that the weight is holding the chamber, avoid the weight to produce and rock, reduce the check error.

When the buoy liquid level meter needs to be checked, the outer barrel of the buoy liquid level meter is fixed on the support or the workbench, the checking device is connected with the torsion tube of the buoy liquid level meter through the zipper 70, and the precision of the buoy liquid level meter is checked by adding and subtracting weights on the tray assembly.

The embodiment provides a checking device, which comprises a fixing piece 10, a tray assembly and a connecting part 30 fixedly connected with the fixing piece 10; the fixing member 10 is provided with an accommodating space extending along the vertical direction, the tray assembly is fixed in the accommodating space, the tray assembly comprises a plurality of tray bodies 20 arranged along the vertical direction at intervals, and each tray body 20 is provided with an accommodating cavity 201 for accommodating weights; the center lines of the plurality of accommodating cavities 201 in the tray assembly coincide and extend in the vertical direction. In the embodiment, through the design of the plurality of tray bodies 20, one weight is placed on each tray body 20, so that the gravity centers of the weights and the tray bodies 20 are ensured to be overlapped, and the central lines of each tray body 20 are overlapped, so that the gravity centers of the weights can also be ensured to be positioned on the same straight line, and the problem of large inspection error caused by the fact that the gravity centers of the weights are not overlapped is solved; further, this embodiment can increase the steadiness of the calibration device by fixing a plurality of tray bodies 20 in the accommodating space of the fixing member 10, and avoid the tray bodies 20 from shaking, thereby improving the inspection accuracy of the calibration device.

Further, as a preferred embodiment of the fixing member 10, the fixing member 10 includes a cylinder extending in a vertical direction, and a plurality of tray bodies 20 are spaced apart in the vertical direction on an inner surface of the cylinder; the barrel is provided with a vertically extending placing port 40, and the placing port 40 is used for placing weights into each tray body 20.

The fixing member 10 may be a vertically extending cylinder, and an inner cavity of the cylinder forms a receiving space. In this embodiment, the structure of barrel can be similar with the structure of the flotation pontoon of flotation pontoon level gauge, has simulated the shape of flotation pontoon, has increased the accuracy of verifying attachment. Wherein, on the internal surface of a plurality of tray body 20 along vertical interval distribution's barrel, can make all can place a weight on the tray body 20 of difference, guarantee like this that the focus of every weight is located tray body 20's center, avoid taking place tray body 20's slope, reduce the check-up error. In addition, the number of the tray bodies 20 can be selected in various ways, and the number of the tray bodies 20 can be designed according to the number of the required weights in the actual verification process.

In order to place the weight on the tray body 20 conveniently, need set up on the barrel and place mouth 40, place the weight on arbitrary tray body 20 through placing mouth 40 to the realization is to the regulation of barrel weight, and then the size of the buoyancy that the simulation barrel received in waiting to detect liquid. The arrangement of the placing port 40 can be selected in various ways, for example, the placing port 40 penetrating through the cylinder is formed on the side wall of the cylinder, the placing port 40 can extend along the vertical direction, and also can form a certain included angle with the vertical direction, and the size of the included angle is not limited in this embodiment; for another example, the placing opening 40 may be formed by a plurality of placing holes, wherein the number of the placing holes is the same as the number of the tray bodies 20, and any one of the placing holes is located above the tray body 20, so that the weight is placed on each tray body 20 through the placing hole, and the placing holes may be arranged in various ways, and may be on the same straight line or different straight lines, and when the placing holes are not on the same straight line, it may be understood that the projections of the placing holes on the horizontal plane do not overlap.

As a possible specific implementation manner, the accommodating cavity includes a cylindrical accommodating portion extending in the vertical direction, and the accommodating portion is used for bearing the weight, wherein the accommodating portion can be in contact with the outer surface of the weight to fix the weight. The diameters of the accommodating parts on each tray body can be the same or different, and the diameter of the accommodating parts can be freely designed according to the diameter of the weight.

As a preferable embodiment of the accommodating parts, the number of the accommodating parts is multiple, the accommodating parts are connected in sequence along the vertical direction, and the center lines of the accommodating parts are overlapped; the plane perpendicular to the vertical direction is taken as a cross section, and the cross section areas of the plurality of accommodating parts are gradually increased along the vertical direction from bottom to top.

As shown in fig. 2 and 3, the number of the accommodating part 202 is a plurality of, a plurality of accommodating parts 202 are connected in proper order along the vertical direction, in order to constitute and to hold the chamber 201, and make the inner surface that holds the chamber 201 be the step-like, just can place the weight of different weights on the tray body 20 like this, namely, both can place big weight and can place little weight on the tray body 20, the size that avoids appearing holding the chamber 201 is unanimous, cause the weight that only can place a specification, the application of calibration equipment has been limited.

When placing the weight on the portion of holding, the surface of weight and the internal surface of portion of holding are laminated mutually, and the bottom of weight and the bottom surface laminating that holds the chamber have guaranteed the central line of weight and the coincidence of the central line of portion of holding.

As an implementation mode of the containing part 202, the plane perpendicular to the vertical direction is taken as the cross section, the cross sectional area of the containing parts 202 is gradually increased along the vertical direction from bottom to top, the top of the containing cavity 201 is provided with an opening, and the weight can be placed on the containing part 202 through the opening, so that the bottom of the weight is in contact with the end face of the containing part 202 close to the opening, the concentricity of each weight is ensured, and meanwhile, the stability of the weight is also ensured.

Further, the tray body 20 can be fixed on the cylinder body or detachably connected to the cylinder body, for example, the plurality of tray bodies 20 are welded on the inner surface of the cylinder body, so that the stability between the tray body 20 and the cylinder body can be ensured, and the phenomenon that the tray body 20 and the cylinder body shake after being used for multiple times is avoided, and the calibration error is increased; for another example, a plurality of tray bodies 20 joint has realized being connected dismantled between tray body 20 and the barrel on the internal surface of barrel, when the check-up to buoy type level gauge need not, can preserve barrel and tray body 20 split, is convenient for carry and accomodates.

In a possible embodiment, an arc-shaped cover 50 is arranged on the cylinder body, and the connecting part 30 is arranged on the arc-shaped cover 50; the connection portion 30 is used for connecting with a float level meter.

The top of the cylinder body is provided with an open hole, a cover body can be arranged on the open hole and is used for covering the open hole, on one hand, the shape of the cylinder body is consistent with that of the buoy, and errors in the checking process are reduced; on the other hand, avoid placing the in-process, on other debris in the external world, for example stone, dust fall into tray body 20, when using calibration equipment, need wash tray body 20, both can increase like this and wash man-hour, also can reduce the accuracy of calibration simultaneously.

The structure of lid can have the multiform, for example, the lid can be for fixing the plate body on the barrel, also can be for arc cover 50, and wherein, the radian of arc cover 50 deviates from the open mouth of barrel, and as for arc cover 50's radian can design according to the diameter of barrel. In addition, the arc cover 50 can be integrated with the cylinder body or can be separated from the cylinder body, the arc cover 50 can be welded on the cylinder body or screwed on the cylinder body, and the connection strength between the cylinder body and the arc cover 50 can be ensured.

The connecting portion 30 is secured to the arcuate housing 50 for connection to a float level gauge, wherein the structure of the connecting portion 30 may take a variety of forms, such as a connecting rope, and further such as a connecting rod 302. In addition, the connecting portion 30 may be welded to the arc cover 50, or may be fastened to the arc cover 50.

During the use, at first be connected connecting portion 30 and the flotation pontoon level gauge of deviating from the one end of arc cover 50, then increase and decrease the weight on to tray body 20 to the buoyancy of simulation flotation pontoon in the liquid that awaits measuring comes the accurate nature of check-up flotation pontoon level gauge.

As a preferred embodiment of the connection part 30, the connection part 30 includes a hook 301 and a connection rod 302 connected to the hook 301, and one end of the connection rod 302 near the cylinder is fixed to the arc cover 50.

The one end of coupler body 301 is used for being connected with the flotation pontoon level gauge, and the other end is used for being connected with connecting rod 302 to realize being connected between flotation pontoon level gauge and the barrel, wherein, coupler body 301 can directly be connected with the flotation pontoon level gauge, also can be connected with the flotation pontoon level gauge through the chaining, and this embodiment adopts coupler body 301 to be connected with the flotation pontoon level gauge, can increase the convenience of operation.

In addition, the hook 301 may be integrally formed with the connecting rod 302, or may be connected to the connecting rod 302 by welding. Furthermore, the mode of connection of connecting rod 302 and arc cover 50 can have multiple optional mode, for example, connecting rod 302 welds on arc cover 50, for example, is formed with the external screw thread again on connecting rod 302, is formed with the internal thread hole on the arc cover 50, and connecting rod 302 threaded connection is in the threaded hole, and, the screw hole preferably sets up the central part at arc cover 50, avoids taking place the skew of barrel.

In a possible embodiment, the tray bodies 20 divide the cylinder into installation sections connected in sequence in the vertical direction, and each installation section is provided with an identification part 60.

Specifically, still set up identification portion 60 on the barrel, wherein, a plurality of tray body 20 divide the barrel into along the vertical erection section that connects gradually, all is provided with an identification portion 60 on every erection section for identification portion 60 and tray body 20 one-to-one, the operator of being convenient for more clearly learns the weight of weight on every tray, and wherein, identification portion 60 can be for bonding the sticky note on the barrel.

Further, the identification part 60 includes a card slot provided on the mounting section and a label provided in the card slot.

Specifically, sign portion 60 is exactly for the convenience of operator's weight of knowing clearly on every tray body 20, and it can be for directly bonding support piece's label, also can be including connecting the draw-in groove on the installation section and setting up at draw-in groove label, can place the label in the draw-in groove like this, avoids bonding the process and also can play the guard action to the label, prevents that the label from taking place to drop under the collision of external force, does not play the function of making things convenient for the operator.

Further, the distance between the adjacent tray bodies 20 is 55-65 mm. The embodiment also designs the size of the distance between the adjacent tray bodies 20, so that the situation that large weights cannot be placed due to the fact that the distance between the two is too small is avoided, and the situation that the size of the whole checking device is too large and the checking accuracy is influenced due to poor stability due to the fact that the distance between the two is too large is also avoided.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A calibration device is characterized by comprising a fixing piece, a tray assembly and a connecting part fixedly connected with the fixing piece;

the fixing piece is provided with an accommodating space extending along the vertical direction, and the tray assembly is fixed in the accommodating space;

the tray assembly comprises a plurality of tray bodies which are arranged at intervals along the vertical direction, and each tray body is provided with an accommodating cavity for accommodating weights; the central lines of the plurality of accommodating cavities in the tray assembly are overlapped and extend along the vertical direction;

the connecting part is used for being connected with the float level meter.

2. The verification device of claim 1, wherein the fixture includes a vertically extending barrel, and a plurality of the tray bodies are vertically spaced apart on an inner surface of the barrel;

3. The verification device of claim 2, wherein the receptacle comprises a vertically extending cylindrical receptacle for carrying a weight.

4. The verification device according to claim 3, wherein the number of the accommodating portions is plural, the plurality of accommodating portions are connected in sequence along the vertical direction, and center lines of the plurality of accommodating portions coincide;

and taking a plane vertical to the vertical direction as a cross section, wherein the cross section area of the plurality of accommodating parts is gradually increased along the vertical direction from bottom to top.

5. The verification device of claim 4, wherein a plurality of the tray bodies are welded to an inner surface of the barrel.

6. The verification device according to any one of claims 2-5, wherein an arc-shaped cover is provided on the barrel, and the connection portion is provided on the arc-shaped cover.

7. The verification device of claim 6, wherein the connection portion comprises a hook body and a connection rod connected with the hook body, and one end of the connection rod close to the cylinder body is fixed on the arc-shaped cover.

8. The checking device as claimed in claim 7, wherein the plurality of tray bodies divide the barrel into mounting sections connected in sequence in a vertical direction, and each mounting section is provided with an identification portion.

9. The verification device of claim 8, wherein the identification portion comprises a card slot disposed on the mounting section and a label disposed within the card slot.

10. A verification device according to claim 9, wherein adjacent tray bodies are spaced apart by 55-65 mm.