Spraying tank type penetration detection device capable of being operated in limited space remotely

Abstract

The invention discloses a spray tank type penetration detection device capable of being operated in a remote limited space in the technical field of penetration detection, which comprises a holding unit, a pressure applying part arranged on the inner side of the holding part, and a pressurizing part arranged at the outermost end above the pressure applying part, the extending component is arranged on one side of the outer end of the holding component, the two clamping components are symmetrically arranged below the outer end of the holding component, and the driving component is connected to the outer end of the holding component in a sleeving mode and located above the clamping components. According to the invention, finger pressing excitation is changed into hand grasping excitation, so that the working intensity of fingers is effectively relieved, and the device can be compatible with spray tank type penetrant reagents with different sizes, and can realize long-distance or detection space blocking limited object surface penetrant detection at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of penetrant testing, and particularly to a penetrant testing device in the form of a spray can that can be operated in a restricted space at a long distance. Background Art

[0002] Penetrant testing technology is a non-destructive testing technology based on the principle of capillary action, mainly used for detecting surface opening defects of non-porous metal or non-metal parts. During testing, a penetrant solution containing a fluorescent dye or a coloring dye is applied to the surface of the part. Due to capillary action, the penetrant seeps into the small surface opening defects. After removing the excess penetrant adhering to the surface of the workpiece, a developer is applied after drying. The penetrant in the defects is re-adsorbed onto the surface of the part under the action of capillary phenomenon, forming an enlarged defect display, and thus the morphology and distribution state of the defects can be detected.

[0003] Currently, spray can type penetrant testing is more suitable for on-site or field operations, that is, reagents such as cleaning agents, penetrants, and developers are filled into a spray can with compressed air. On-site, by pressing the pressure knob, the ejection and use of the penetrant reagent can be achieved. In the prior art, when using a spray can for testing work, the operator needs to press the nozzle with fingers for a long time, which is likely to cause finger soreness. At the same time, spray can type penetrant testing can only perform penetrant testing on the surface of an object at a short distance and with an unobstructed testing space, while for the surface of an object at a long distance or with an obstructed testing space, penetrant testing cannot be effectively implemented. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a penetrant testing device in the form of a spray can that can be operated in a restricted space at a long distance, and its purpose is to: relieve the working intensity, achieve penetrant testing on the surface of an object at a long distance or with a restricted testing space or blocked line of sight, and broaden the on-site application scenarios of penetrant testing.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: including a holding unit, which includes a holding member, a pressing member arranged inside the holding member, a boosting member arranged at the outermost end above the pressing member, an extending member arranged at one side of the outer end of the holding member, two groups of clamping members symmetrically arranged below the outer end of the holding member, and a driving member sleeved on the outer end of the holding member and located above the clamping members.

[0007] As a preferred embodiment of the penetrant testing device capable of operating in a confined space at a distance in the form of a spray can according to the present invention, wherein: the holding member includes an "L"-shaped grip, and the opening of the "L"-shaped structure of the grip faces downward. A relief groove is vertically formed in the grip, and the pressing member is disposed in the relief groove. A connecting cylinder is connected to the outer end above the grip, and the connecting cylinder extends downward. A receiving groove is formed in the center of the connecting cylinder, two symmetrically arranged limiting grooves are formed on the connecting cylinder, and a limiting ring is sleeved on the outer side of the end of the connecting cylinder.

[0008] As a preferred embodiment of the penetrant testing device capable of operating in a confined space at a distance in the form of a spray can according to the present invention, wherein: the pressing member includes a handle vertically located in the relief groove, a pressing rod horizontally connected to the top end of the handle, and a pressing plate disposed at the outer end of the handle and located in the receiving groove.

[0009] As a preferred embodiment of the penetrant testing device capable of operating in a confined space at a distance in the form of a spray can according to the present invention, wherein: the pressurizing member includes a flexible sleeve disposed on the bottom surface of the pressing plate, a pressurizing pipe connected to one side of the flexible sleeve, and the outer end of the pressurizing pipe is communicated with the extending member, and a compressed air inlet pipe connected to the other side of the flexible sleeve.

[0010] As a preferred embodiment of the penetrant testing device capable of operating in a confined space at a distance in the form of a spray can according to the present invention, wherein: the whole pressurizing pipe is composed of two conical structures with opposite tops. The diameter sizes of each section of the pressurizing pipe are different, and the overall diameter changes in a three-stage transformation of thick, thin, and thick. The thick sections on both sides are respectively communicated with the flexible sleeve and the extending member.

[0011] As a preferred embodiment of the penetrant testing device capable of operating in a confined space at a distance in the form of a spray can according to the present invention, wherein: the extending member includes a universal pipe connected to the pressurizing pipe and extending outward through the outside of the connecting cylinder, an atomizing nozzle connected to the end of the universal pipe, and a fixing sleeve disposed at the end of the universal pipe and located on the side of the atomizing nozzle.

[0012] As a preferred embodiment of the penetrant testing device capable of operating in a confined space at a distance in the form of a spray can according to the present invention, wherein: the clamping member includes a clamping block inserted into the limiting groove, a plurality of pushing blocks horizontally distributed at the top end of the clamping block, and two groups of clamping plates symmetrically disposed on both sides of the inner end of the clamping block.

[0013] As a preferred embodiment of the penetrant testing device capable of operating in a confined space at a distance in the form of a spray can according to the present invention, wherein: the clamping plate is in an arc-shaped sheet structure, and the arc-shaped inner surfaces of the two groups of clamping plates are in the same arc plane as the inner end inner surface of the clamping block.

[0014] As a preferred embodiment of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention, wherein: the driving component includes a driving wheel sleeved on the connecting cylinder, a plurality of groups of bumps annularly distributed on the outer ring of the driving wheel, and a driving rack spirally wound on the bottom surface of the driving wheel.

[0015] As a preferred embodiment of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention, wherein: the driving rack has 1 spiral turn, and the spiral amplitude gradually decreases from the inside to the outside. The spiral path of the driving rack passes through the top of the clamping component and just passes through between every two groups of the pushing blocks.

[0016] The beneficial effects of the present invention: changing the finger-pressing activation to hand-gripping activation can effectively relieve the working intensity of the fingers, and can be compatible with various spray can penetrant reagents of different sizes. At the same time, it can achieve penetrant testing on the surface of objects at a distance or with restricted detection space blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings. Among them:

[0018] Figure 1 It is a schematic diagram of the overall structure of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention.

[0019] Figure 2 It is a schematic diagram of the internal structure of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention.

[0020] Figure 3 It is a schematic diagram of the holding component structure of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention.

[0021] Figure 4 It is a schematic diagram of the clamping component structure of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention.

[0022] Figure 5 It is a schematic diagram of the driving component structure of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention.

[0023] Figure 6 It is a schematic diagram of the connection part structure of the pushing block and the driving rack of the penetrant testing device that can be operated in a restricted space at a distance with a spray can according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] Example 1

[0029] Reference Figure 1 , which is the first embodiment of the present invention, provides a spray-can type penetration detection device that can be operated in a confined space at a long distance, the device includes a holding unit 100, including a holding part 101, a pressure-applying part 102 arranged on the inner side of the holding part 101, a boosting part 103 arranged at the outermost end above the pressure-applying part 102, an extension part 104 arranged on one side of the outer end of the holding part 101, two groups of clamping parts 105 symmetrically arranged below the outer end of the holding part 101, and a driving part 106 sleeved on the outer end of the holding part 101 and located above the clamping part 105.

[0030] During use, the osmotic agent spray can 200 is inserted into the holding component 101 from bottom to top, and the two sets of clamping components 105 are driven by rotating the driving component 106 to clamp and fix the osmotic agent spray can 200. By holding and squeezing the pressure-applying component 102, the reagent in the osmotic agent spray can 200 can be sprayed outward through the extension component 104. The extension component 104 can adjust the shape and extension position according to actual usage requirements to meet different usage requirements. Compressing the osmotic agent spray can 200 by gripping and pressing is more labor-saving than pressing with fingers, and can effectively avoid the occurrence of soreness caused by pressing the nozzle with fingers for a long time.

[0031] Embodiment 2

[0032] Reference Figures 2 to 3 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that through the cooperation of the pressing member 102 and the holding member 101, the finger pressing excitation is changed to hand grasping excitation, effectively alleviating the working intensity of the fingers. The remote or surface penetration detection of an object with limited detection space blocked is achieved through the extension member 104.

[0033] Compared with Embodiment 1, further, the holding member 101 includes an "L"-shaped grip 101a, and the opening of the "L"-shaped structure of the grip 101a faces downward. A relief groove 101b is vertically formed in the grip 101a, and the pressing member 102 is disposed in the relief groove 101b. A connecting cylinder 101c is connected to the outer end above the grip 101a, and the connecting cylinder 101c extends downward. A receiving groove 101d is formed in the center of the connecting cylinder 101c. Two groups of limiting grooves 101e are symmetrically disposed on the connecting cylinder 101c, and a limiting ring 101f is sleeved on the outer side of the end of the connecting cylinder 101c.

[0034] During use, the connecting cylinder 101c and the grip 101a are in a fixed connection relationship. The unique structure of the grip 101a is for easy grasping, and the limiting groove 101e is used to install and limit the clamping member 105, so that the clamping member 105 can only perform horizontal translational sliding within the limiting groove 101e.

[0035] Among them, the pressing member 102 includes a handle 102a vertically located in the relief groove 101b, a pressing rod 102b horizontally connected to the top end of the handle 102a, and a pressing plate 102c disposed at the outer end of the handle 102a and located in the receiving groove 101d. A rotating shaft is provided at the connection position between the handle 102a and the pressing rod 102b. The pressing member 102 can rotate as a whole around the rotating shaft. The pressing plate 102c covers the receiving groove 101d and has the same diameter as the receiving groove 101d. The arc-shaped pressing rod 102b is rotatably connected to the pressing plate 102c at the end. Therefore, when the handle 102a drives the pressing rod 102b to rotate, the pressing rod 102b will press the pressing plate 102c to move downward along the receiving groove 101d.

[0036] Among them, the boost component 103 includes a flexible sleeve 103a arranged on the bottom surface of the pressure plate 102c, a boost pipe 103b connected to one side of the flexible sleeve 103a, and the outer end of the boost pipe 103b is connected to the extension component 104, and a compressed air inlet pipe 103c connected to the other side of the flexible sleeve 103a. The flexible sleeve 103a is a trumpet-shaped flexible tube with an opening downward, which is convenient for the insertion of the nozzle pipe of the penetration agent spray can 200. Under the action of downward pressing force, the sealing and pressure-maintaining effect of the connection between the nozzle pipe and the flexible sleeve 103a can be achieved. The compressed air inlet pipe 103c extends as a whole to the outside of the connecting tube 101c through the other side, and the outer side thereof can adjust the compressed air flow and pressure through an external flow regulating valve and a pressure regulating valve.

[0037] During use, the osmotic agent spray can 200 is fixed in the connecting tube 101c by the clamping component 105, so that the nozzle tube at the top of the osmotic agent spray can 200 is inserted into the flexible sleeve 103a, and the grip 101a is held, and then the handle 102a is squeezed by a fist to move the handle 102a into the yielding groove 101b. The moving handle 102a pushes the pressing plate 102c to move downward in the receiving groove 101d through the pressing rod 102b at the top of the handle 102a, and the downward moving pressing plate 102c The boost component 103 will be pushed to squeeze the top nozzle of the osmotic agent spray can 200, thereby causing the agent in the osmotic agent spray can 200 to spray outward. At the same time, the moving handle 102a will squeeze 102d to contract and store energy. When the pressure disappears, it will expand outward and drive the pressure component 102 to reset. Through the cooperation of the pressure component 102 and the holding component 101, the traditional technology of using finger pressing to stimulate is changed to hand grasping to stimulate, which can effectively reduce the working intensity of the fingers and improve working comfort.

[0038] Furthermore, the boost tube 103b is composed of two conical structures with opposite tops. The diameters of the various sections of the boost tube 103b are different, and the overall diameter change range is coarse, thin, and coarse. The coarse sections on both sides are connected to the flexible sleeve 103a and the extension component 104 respectively.

[0039] During use, through the special structure of the booster tube 103b, when the gas in the osmotic reagent spray can 200 is sprayed out, it will enter the thin end located in the middle from the thicker end of the booster tube 103b. At this time, the gas reagent discharge port contracts, which will increase the pressure of the reagent discharge, thereby reducing the flow rate of the reagent gas flowing outward, but increasing the flow rate, thereby increasing the thrust, thereby ensuring that the reagent has sufficient pushing pressure to be smoothly discharged in the long-distance extension component 104.

[0040] Among them, the extension member 104 includes a universal tube 104a connected to the supercharging tube 103b and extending outward through the outside of the connecting cylinder 101c, an atomizing nozzle 104b connected to the end of the universal tube 104a, and a fixing sleeve 104c provided at the end of the universal tube 104a and located on the side of the atomizing nozzle 104b.

[0041] During use, the extension member 104 is a serpentine tube structure, usually having a corrugated or bent structure. This design enables the pipeline to maintain a certain strength when bent, while allowing the pipeline to expand, contract, and bend axially and radially, thereby meeting the conditions for performing penetrant testing on the surface of an object with a long distance or limited detection space obstruction. When in use, an external compressed air pipe is connected to the compressed air inlet pipe 103c, and the universal tube 104a is manually bent to align with the part that needs to be applied with penetrant reagent for testing. If it is an object surface with a long distance or detection space obstruction, the endoscope lens tube can be fixed through the fixing sleeve 104c on one side of the universal tube 104a, and the endoscope is used to observe the line-of-sight restricted part, and the universal tube 104a is aligned with the part to be inspected.

[0042] The remaining structures are the same as those of Embodiment 1.

[0043] Embodiment 3

[0044] Refer to Figures 4 to 6 , which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that through the cooperation of the clamping member 105 and the driving member 106, it is possible to achieve compatibility and fixation of various different sizes of spray can type penetrant reagents.

[0045] Compared with Embodiment 2, further, the clamping member 105 includes a clamping block 105a inserted into the limiting groove 101e, multiple groups of pushing blocks 105b horizontally distributed at the top of the clamping block 105a, and two groups of clamping plates 105c symmetrically arranged on both sides of the inner end of the clamping block 105a. The clamping block 105a has an inverted trapezoidal structure that is wider at the top and narrower at the bottom. When the top 105d of it is driven by the driving member 106, the force at the top can be effectively transmitted to the clamping plates 105c on both sides below the clamping block 105a, thereby ensuring that the clamping plates 105c have a reliable clamping force.

[0046] Further, the clamping plate 105c is an arc-shaped sheet structure, and the arc-shaped inner sides of the two groups of clamping plates 105c are in the same arc plane as the inner side surface of the inner end of the clamping block 105a. The setting of the arc-shaped structure enables the clamping member 105 to be better limited and fixed on the penetrant reagent spray can 200 with an arc-shaped outer wall, ensuring the tightness of the connection when the clamping member 105 clamps the penetrant reagent spray can 200.

[0047] Among them, the driving component 106 includes a driving wheel 106a sleeved on the connecting cylinder 101c, multiple groups of bumps 106b annularly distributed on the outer circle of the driving wheel 106a, and a driving rack 106c spirally wound around the bottom surface of the driving wheel 106a. The multiple groups of bumps 106b form protrusions outside the driving wheel 106a, which can facilitate the operation and processing of the driving component 106.

[0048] Furthermore, the number of spiral turns of the driving rack 106c is 1, and the spiral amplitude gradually decreases from the inside to the outside. The spiral path of the driving rack 106c passes through the top of the clamping component 105 and just passes between every two groups of pushing blocks 105b. The driving rack 106c located between the pushing blocks 105b will press and push the pushing blocks 105b when rotating, thereby pushing the entire clamping component 105 to move.

[0049] During use, the penetration reagent spray can 200 is inserted into the connecting cylinder 101c, and the driving component 106 is rotated. The driving component 106 will drive the driving rack 106c with a threaded structure to rotate synchronously. The rotating driving rack 106c will continuously squeeze the pushing blocks 105b through meshing with the pushing blocks 105b and the continuous change of its own thread amplitude, so that the pushing blocks 105b drive the entire clamping component 105 to move. The two clamping components 105 move synchronously, and can clamp and limit the penetration reagent spray can 200 from two directions, achieving the purpose of limiting and fixing the penetration reagent spray can 200. At the same time, the moving distance of the clamping component 105 is affected by the number of turns of the driving component 106. Therefore, according to the tank size of the penetration reagent spray can 200, the number of turns of the driving component 106 can be adjusted, so as to achieve the purpose of being able to compatibly fix multiple penetration reagent spray cans 200 of different sizes and improve the flexibility of the device.

[0050] The remaining structures are the same as those in Embodiment 2.

[0051] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or re-ordered according to alternative embodiments. In the claims, any clause of "means-plus-function" is intended to cover the structures that perform the recited function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0052] In addition, to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention, or those features that are not relevant to the implementation of the present invention).

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A spray can type penetration detection device that can be operated in a remote and confined space, characterized in that: include, The holding unit (100) comprises a holding part (101), a pressure-applying part (102) arranged on the inner side of the holding part (101), a pressurizing part (103) arranged at the outermost end above the pressure-applying part (102), an extending part (104) arranged on one side of the outer end of the holding part (101), two groups of clamping parts (105) symmetrically arranged below the outer end of the holding part (101), and a driving part (106) sleeved on the outer end of the holding part (101) and located above the clamping part (105).

2. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 1 is characterized in that: The holding component (101) comprises an "L"-shaped handle (101a), and the "L"-shaped structure of the handle (101a) opens downward, and a clearance groove (101b) is vertically opened in the handle (101a), and the pressure-applying component (102) is arranged in the clearance groove (101b), connected to a connecting tube (101c) at the upper outer end of the handle (101a), and the connecting tube (101c) extends downward, and a receiving groove (101d) is opened in the center of the connecting tube (101c), two groups of limiting grooves (101e) symmetrically arranged on the connecting tube (101c), and a limiting ring (101f) sleeved on the outer side of the end of the connecting tube (101c).

3. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 2 is characterized in that: The pressure-applying component (102) comprises a handle (102a) vertically located in the clearance groove (101b), a pressure rod (102b) laterally connected to the top end of the handle (102a), and a pressure plate (102c) arranged at the outer end of the handle (102a) and located in the receiving groove (101d).

4. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 3 is characterized in that: The boost component (103) includes a flexible sleeve (103a) arranged on the bottom surface of the pressure plate (102c), a boost pipe (103b) connected to one side of the flexible sleeve (103a), and the outer end of the boost pipe (103b) is connected to the extension component (104), and a compressed air inlet pipe (103c) connected to the other side of the flexible sleeve (103a).

5. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 4 is characterized in that: The boost tube (103b) is composed of two conical structures with opposite tops. The diameters of the various sections of the boost tube (103b) are different. The overall diameter change range is three-section change: coarse, thin, and coarse. The coarse sections on both sides are respectively connected to the flexible sleeve (103a) and the extension component (104).

6. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 5 is characterized in that: The extension component (104) comprises a universal tube (104a) connected to the boost tube (103b) and extending outwardly through the outside of the connecting tube (101c), an atomizing nozzle (104b) connected to the end of the universal tube (104a), and a fixing sleeve (104c) arranged at the end of the universal tube (104a) and located on the side of the atomizing nozzle (104b).

7. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 6 is characterized in that: The clamping component (105) comprises a clamping block (105a) inserted into the limiting groove (101e), a plurality of groups of pushing blocks (105b) distributed laterally at the top of the clamping block (105a), and two groups of clamping plates (105c) symmetrically arranged on both sides of the inner end of the clamping block (105a).

8. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 7 is characterized in that: The clamping plates (105c) are of arc-shaped sheet structure, and the arc-shaped inner side surfaces of the two groups of clamping plates (105c) and the inner side surface of the inner end of the clamping block (105a) are located on the same arc-shaped plane.

9. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 8, characterized in that: The driving component (106) comprises a driving wheel (106a) sleeved on the connecting tube (101c), a plurality of groups of protrusions (106b) distributed in an annular shape on the outer ring of the driving wheel (106a), and a driving rack (106c) spirally wrapped around the bottom surface of the driving wheel (106a).

10. The spray-can type penetration detection device capable of operating in a remote and confined space according to claim 9, characterized in that: The number of spiral turns of the driving rack (106c) is 1, and the spiral amplitude gradually decreases from the inside to the outside. The spiral path of the driving rack (106c) passes through the top of the clamping component (105) and just passes between every two groups of the pushing blocks (105b).

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