A tightness tester for pre-fitting hollow capsules

Abstract

This invention relates to the field of capsule testing technology, specifically providing a tightness tester for pre-fitting hollow capsules. The tester includes a frame, a feeding cylinder, a rotating disk, and a testing unit. The testing unit includes an upper testing disk and a lower testing disk, with a tension sensor positioned between them. It also features a first clamping hole and a second clamping hole that gradually increase in size circumferentially. The tension sensor monitors the tension value at the moment the head and tail of the hollow capsule separate in real time, transforming traditional qualitative testing relying on manual feel into quantitative data judgment, avoiding subjective errors in manual testing. The first and second clamping holes are designed to accommodate the diameter difference between the head and tail of the hollow capsule, allowing for the feeding of hollow capsules of different sizes. The clamping assembly feeds hollow capsules of different sizes into the first clamping hole, significantly improving the accuracy and stability of hollow capsule feeding and effectively ensuring the reliability of the testing process.

Description

Technical Field

[0001] This invention relates to the field of capsule testing technology, and in particular to a tester for the tightness of pre-fitted hollow capsules. Background Technology

[0002] Tightness testing equipment is a type of professional instrument used to quantitatively assess the tightness of connections, assembly, or joints of objects. It is widely used in industrial manufacturing, pharmaceutical packaging, consumer goods production, and other fields. Its core function is to accurately measure the "force required for separation" through mechanical testing methods, thereby judging the assembly quality, safety, and reliability of the product.

[0003] Currently, domestic empty capsule manufacturers rely on manual inspection to check the tightness of empty capsules before they leave the factory. This sometimes leads to problems during filling with powder in pharmaceutical filling machines – sometimes the capsules are too loose, causing the AB caps to separate on the machine, and sometimes the pre-lock is too tight, preventing them from separating. The solution involves two methods: manual and automatic, for detecting the tension (resistance) of the empty capsule pre-locking.

[0004] Manual tension separation: A digital display tensile tester is equipped with a hollow capsule manual clamping device and a model mold. The hollow capsule is pressed on the tension device while being manually pried open. When it is pried open, the digital display will show and lock the maximum value, which is a reliable parameter. Automatic tension separation: A digital display tensile tester is equipped with a hollow capsule automatic clamping device and a mold. The hollow capsule is placed into the funnel of the tester for automatic testing and recording.

[0005] However, in the existing automatic tensile separation detection technology, if the clamping and positioning of the hollow capsule is not accurate, the detection results will be inaccurate and it has significant limitations. Summary of the Invention

[0006] Therefore, it is necessary to provide a hollow capsule pre-fitting tightness tester to address the current problems of low accuracy and significant limitations in hollow capsule tightness testing.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A tightness tester for pre-fitting hollow capsules includes:

[0009] A frame, on which a feeding cylinder is vertically arranged, the inside of which is used to fill hollow capsules;

[0010] A sorting component for arranging the hollow capsules inside the feed cylinder with their heads facing down;

[0011] A rotating disk is rotatably mounted on the frame. A detection unit is provided on the rotating disk. The detection unit includes an upper detection disk and a lower detection disk arranged coaxially. A plurality of first clamping holes are evenly opened along the circumferential direction on the lower detection disk. The size of the plurality of first clamping holes gradually increases along the circumferential direction. A plurality of second clamping holes are opened along the circumferential direction on the upper detection disk. The plurality of second clamping holes correspond one-to-one with the plurality of first clamping holes.

[0012] A clamping assembly is configured to deliver the head of a single hollow capsule into the first clamping hole of a corresponding size when the feed cylinder corresponds to the first clamping hole, and the tail of the hollow capsule is clamped by the second clamping hole of the upper detection plate.

[0013] Furthermore, the clamping assembly includes an annular airbag and an air pump. The annular airbag is coaxially and fixedly disposed at the bottom of the feed cylinder. The air pump's air pipe is connected to the annular airbag. The diameter of the inner ring of the annular airbag is positively correlated with the diameter of the hollow capsule.

[0014] Furthermore, the sorting component includes two first baffles, two second baffles, and an adjusting rod. The feeding cylinder has two parts: a flat cylinder and a round cylinder, with a smooth conical surface between the two parts. The adjusting rod is positioned above the smooth conical surface. The two first baffles are slidably disposed in the flat cylinder part of the feeding cylinder, and the two second baffles are slidably disposed inside the round cylinder part of the feeding cylinder. A hollow capsule in a vertical position is allowed to be accommodated between the two second baffles, with the head of the hollow capsule facing downwards.

[0015] Furthermore, a first rotating motor is provided on the outer periphery of the flat material cylinder of the feeding cylinder, and the rotating shaft of the first rotating motor is movably connected to two first baffles. A second rotating motor is provided on the outer periphery of the round material cylinder of the feeding cylinder, and the rotating shaft of the second rotating motor is movably connected to two second baffles.

[0016] Furthermore, the conveying cylinder has a telescopic section, and a hydraulic telescopic cylinder is provided on the telescopic section of the conveying cylinder.

[0017] Furthermore, the rotating disk is provided with a bracket and a support arm. The bracket is fixedly mounted on the upper end face of the rotating disk, and the support arm is vertically slidably mounted on the bracket. The upper detection disk is rotatably mounted on the support arm, and the lower detection disk is rotatably mounted on the bracket. A hydraulic push rod is provided between the bracket and the support arm.

[0018] Furthermore, the lower detection plate is provided with a first suction pipe, which is connected to a plurality of first clamping holes, and the upper detection plate is provided with a second suction pipe, which is connected to a plurality of second clamping holes.

[0019] Furthermore, there are multiple detection units, which are evenly distributed along the circumference of the rotating disk.

[0020] Furthermore, an air blowing pipe is eccentrically provided at the bottom of the first clamping hole, and a feeding frame is provided on the frame, the feeding frame being close to the outer periphery of the rotating disk.

[0021] Furthermore, a feed funnel is provided at the top of the feed cylinder.

[0022] The beneficial effects of this invention are:

[0023] This invention uses a tension sensor to monitor the tension value at the moment the head and tail of the hollow capsule separate in real time, transforming the traditional qualitative detection relying on manual feel into quantitative data judgment. This accurately reflects the tightness of the fit, avoids the subjective error of manual detection, and ensures the objectivity and consistency of the detection results. The first and second clamping holes of the detection unit gradually increase in size along the circumference and correspond one-to-one. Combined with the diameter difference design of the head and tail of the hollow capsule, it can accommodate hollow capsules of different specifications. Furthermore, the clamping assembly transports hollow capsules of different specifications into the first clamping hole. This clamping and positioning structure not only has strong adaptability but also significantly improves the accuracy and stability of hollow capsule feeding, effectively ensuring the reliability of the detection process.

[0024] This invention uses a sorting component, which includes two first baffles, a second baffle, and an adjusting rod. The alternating action of the first and second baffles and the guiding effect of the adjusting rod automatically arrange the hollow capsules into a uniform head-down posture without manual intervention.

[0025] This invention achieves continuous batch testing by evenly distributing multiple detection units along the circumference of a rotating disk, which sequentially complete the feeding, testing, and unloading processes as the disk rotates intermittently, thus significantly improving testing efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a hollow capsule pre-fitting tightness detector according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A partially enlarged view of part A of the hollow capsule pre-fitting tightness tester provided in one embodiment;

[0028] Figure 3 A cross-sectional view of a hollow capsule pre-fitting tightness detector provided in an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A partial enlarged view of part B of the hollow capsule pre-fitting tightness tester provided in one embodiment;

[0030] Figure 5 for Figure 4 A partial enlarged view of part C of the hollow capsule pre-fitting tightness tester provided in one embodiment;

[0031] Figure 6 This is a state diagram of the detection unit of the hollow capsule pre-fitting tightness detector provided in an embodiment of the present invention when the hollow capsule is not being detected;

[0032] Figure 7 A state diagram of the detection unit of the hollow capsule pre-fitting tightness detector provided in an embodiment of the present invention when detecting a hollow capsule;

[0033] Figure 8 for Figure 7 A partially enlarged view of part D of the hollow capsule pre-fitting tightness tester provided in one embodiment;

[0034] Figure 9 This is a schematic diagram showing the state of the detection unit of the hollow capsule pre-fitting tightness detector, provided in an embodiment of the present invention, with the head and tail of the hollow capsule separated.

[0035] Figure 10 This is a schematic diagram showing the state of the detection unit of the hollow capsule pre-fitting tightness detector combined with the head and tail of the hollow capsule, according to an embodiment of the present invention.

[0036] Figure 11 This is a schematic diagram showing the state of the detection unit of the hollow capsule pre-fitting tightness detector, provided in an embodiment of the present invention, preparing to discharge material.

[0037] in:

[0038] 100. Frame; 110. Feeding frame; 120. Inclined plate; 130. Feeding cylinder; 131. Flat material cylinder; 132. Round material cylinder; 133. Telescopic section; 134. Hydraulic telescopic cylinder; 140. First baffle; 141. First rotating motor; 142. First connecting plate; 143. First chute; 150. Second baffle; 151. Second rotating motor; 152. Second connecting plate; 153. Second chute; 160. Annular airbag; 170. Vent pipe; 180. Funnel; 190. Adjusting rod;

[0039] 200. Rotary disc; 210. Support; 220. Lower detection disc; 230. First clamping hole; 231. First suction pipe; 232. Air blowing pipe; 240. Support arm; 241. Hydraulic push rod; 250. Upper detection disc; 260. Second clamping hole; 261. Second suction pipe; 262. Push block; 263. Pneumatic telescopic cylinder; 264. Channel; 265. Sealing ring;

[0040] 300. Empty capsule; 310. Head. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0042] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] The following reference Figures 1-11 This invention describes a tightness tester for pre-fitting hollow capsules.

[0045] A pre-fitting tightness tester for hollow capsules, suitable for testing the tightness of hollow capsules 300, includes a frame 100, on which a feed cylinder 130 is vertically arranged. The feed cylinder 130 is used to fill hollow capsules 300 and can transport hollow capsules 300. A sorting component is provided on the frame 100 to sort the hollow capsules 300 inside the feed cylinder 130, and the hollow capsules 300 are arranged with their heads 310 (head 310 refers to the cap end of the hollow capsule 300) facing down, so that the hollow capsules 300 are all output from the feed cylinder 130 in the same direction.

[0046] A rotating disk 200 is rotatably mounted on the frame 100. A detection unit is mounted on the rotating disk 200. The detection unit is used to detect the force required to open the hollow capsule 300 to obtain the tightness of the hollow capsule 300. The detection unit includes an upper detection disk 250 and a lower detection disk 220 arranged coaxially. The lower detection disk 220 has a plurality of first clamping holes 230 evenly opened in the circumferential direction. The size of the plurality of first clamping holes 230 gradually increases in the circumferential direction, so as to be able to adapt to the size of the head 310 of hollow capsules 300 of different specifications, and ensure that the head 310 of hollow capsules 300 of different models can be stably clamped. The upper detection plate 250 has a plurality of second clamping holes 260 evenly distributed along its circumference. The size of the plurality of second clamping holes 260 gradually increases along the circumferential direction, and the plurality of second clamping holes 260 correspond to the size of the plurality of first clamping holes 230 respectively. It should be noted that since the diameter of the head 310 of the hollow capsule 300 is slightly larger than that of the tail (the tail refers to the end of the hollow capsule 300 without the cap), the size of the second clamping hole 260 is slightly larger than the size of the corresponding first clamping hole 230. This allows the head 310 and the tail of the hollow capsule 300 to be clamped and positioned by the first clamping hole 230 and the second clamping hole 260 respectively, ensuring that the hollow capsule 300 will not shift or fall off during the detection process. In this invention, the upper detection plate 250 can move axially relative to the lower detection plate 220. When the hollow capsule 300 is clamped by the first clamping hole 230 and the second clamping hole 260, the upper detection plate 250 moves upward relative to the lower detection plate 220, thereby pulling the head 310 and the tail of the hollow capsule 300, causing the head 310 and the tail of the hollow capsule 300 to separate. A tension sensor (not shown in the figure) is provided between the upper detection plate 250 and the lower detection plate 220. The tension sensor can monitor the tension value applied by the upper detection plate 250 and the lower detection plate 220 to the hollow capsule 300 in real time and transmit the data to the control system.

[0047] Understandably, the tension value at the moment the head 310 and tail of the hollow capsule 300 separate directly reflects the tightness of their fit. By detecting and recording this key tension value through a tension sensor, the control system can quickly analyze and determine the tightness of the pre-fitting of the hollow capsule 300. The larger the tension value, the tighter the fit; if the tension value is within the standard range, it indicates that the tightness of the hollow capsule 300 is qualified; if the tension value is too small, it means that the fit is too loose, thus achieving accurate judgment on the pre-fitting quality of the hollow capsule 300.

[0048] Specifically, the clamping assembly in this embodiment includes an annular airbag 160 and an air pump (not shown in the figure). The annular airbag 160 is made of highly elastic and aging-resistant silicone material and has a ring-shaped structure, such as... Figure 5As shown, the annular airbag 160 is coaxially and fixedly installed at the opening at the bottom of the conveying cylinder 130. The outer periphery of the annular airbag 160 is fixedly installed on the inner wall of the bottom of the conveying cylinder 130, and the inner ring of the annular airbag 160 is suspended. The diameter of the inner ring of the annular airbag 160 is positively correlated with the diameter of the head 310 of the hollow capsule 300. That is, when the diameter of the head 310 of the hollow capsule 300 is large, the inner ring of the annular airbag 160 can be adjusted to a suitable diameter by inflation; when the diameter of the head 310 of the hollow capsule 300 is small, the inner ring of the annular airbag 160 can be reduced synchronously by deflation and contraction, thereby achieving adaptive clamping of hollow capsules 300 of different specifications. To change the inner diameter of the annular airbag 160, the air pump in this embodiment is mounted on the frame 100. The air pump's vent pipe 170 is connected to the annular airbag 160. When the sorting component inside the feed cylinder 130 arranges the hollow capsule 300 with its head 310 facing downwards and the head 310 passes through the annular airbag 160, the control system triggers the air pump to operate. The air pump fills the annular airbag 160 with gas at a preset pressure (this preset pressure is relatively small to avoid squeezing and damaging the hollow capsule 300) through the vent pipe 170. Under the action of the gas pressure, the inner circumference of the annular airbag 160 expands uniformly until it fits tightly against the outer wall of the head 310 of the hollow capsule 300, thereby stably clamping the head 310 part of the hollow capsule 300. This flexible clamping method can ensure the firmness of the clamping and avoid squeezing and damaging the shell of the hollow capsule 300.

[0049] It should be noted that after the annular airbag 160 completes the clamping of the hollow capsule 300, the feed cylinder 130 will adjust its position in coordination with the annular airbag 160 to precisely move the hollow capsule 300 downwards, so that the head 310 of the hollow capsule 300 is accurately aligned with the corresponding first clamping hole 230 on the lower detection plate 220. Subsequently, the air pump controls the annular airbag 160 to deflate, and the inner ring diameter of the annular airbag 160 shrinks to release the hollow capsule 300, preparing for the subsequent tightness detection process. This clamping and positioning structure not only has strong adaptability, but also significantly improves the accuracy and stability of the hollow capsule 300 feeding, effectively ensuring the reliability of the detection process.

[0050] More specifically, the sorting assembly of the present invention includes two first baffles 140, two second baffles 150, and an adjusting rod 190, as shown below. Figure 4As shown, the feeding cylinder 130 in this embodiment has a flat cylinder 131 and a round cylinder 132. The flat cylinder 131 is located above the round cylinder 132, and the two are connected by a smooth conical surface. The cross-section of the flat cylinder 131 is similar to a rectangle, with two parallel sides connected by an arc-shaped edge. That is, the cross-section is the same as the outline of the hollow capsule 300. The distance between the two parallel sides of the cross-section of the flat cylinder 131 is slightly larger than the diameter of the largest hollow capsule 300. It should be noted that the diameter of the largest hollow capsule 300 that can be accommodated in this embodiment is less than twice the diameter of the smallest hollow capsule 300, thereby avoiding two hollow capsules 300 horizontally side by side in the flat cylinder 131. The cross-section of the round cylinder 132 is circular, and the diameter of the round cylinder 132 is slightly larger than the largest hollow capsule 300, so that only a single hollow capsule 300 can pass vertically in the round cylinder 132, avoiding the hollow capsules 300 being vertically side by side.

[0051] Two first baffles 140 are arranged parallel to each other, and the two first baffles 140 are horizontally slidably disposed on the side wall of the flat material cylinder 131 and perpendicular to the side wall, as shown. Figure 4 As shown, there is a certain distance between the two first baffles 140. When the two first baffles 140 slide into the flat material cylinder 131, both first baffles 140 cover half of the flat material cylinder 131. In this embodiment, the two first baffles 140 completely cover the flat material cylinder 131 at different times. When one first baffle 140 completely covers the flat material cylinder 131, the other first baffle 140 does not cover the flat material cylinder 131. The timing of completely covering the flat material cylinder 131 changes continuously, so that multiple hollow capsules 300 pass through the two first baffles 140 in a horizontal state in sequence, and finally enter the round material cylinder 132 through the smooth conical surface. The adjusting rod 190 is vertically and fixedly set on the inner wall of the flat material cylinder 131 and is located in the middle position. Figure 4 As shown, specifically located above the smooth conical surface, since the diameter of the head 310 of the hollow capsule 300 is slightly larger than the diameter of the tail, the weight of the head 310 will be slightly greater than the weight of the tail. After the hollow capsule 300 detaches from the first baffle 140 below, it will contact the adjusting rod 190, and the adjusting rod 190 will contact the middle position of the hollow capsule 300 (this middle position refers to the midpoint of the length of the hollow capsule 300). Due to the position of the adjusting rod 190 and the fact that the weight of the head 310 of the hollow capsule 300 is greater than the weight of the tail, the hollow capsule 300 will pass through the smooth conical surface with its head 310 facing downwards. The upper opening of the smooth conical surface is larger than the lower opening, and the lower opening connects to the cylindrical material cylinder 132, so the hollow capsule 300 will enter the cylindrical material cylinder 132.

[0052] like Figure 5As shown, two second baffles 150 are horizontally and slidably disposed on the side wall of the cylindrical tube 132. There is a gap between the two second baffles 150, which is slightly larger than the length of the largest hollow capsule 300. The two second baffles 150 move in the same manner as the two first baffles 140. When one second baffle 150 completely covers the cylindrical tube 132, the other second baffle 150 does not cover the cylindrical tube 132. Specifically, when the hollow capsule 300 enters the cylindrical tube 132 through the adjusting rod 190 and the smooth conical surface, its head 310 faces downwards, and the head 310 of the hollow capsule 300 abuts against the upper second baffle 150. When the upper second baffle 150 no longer covers the cylindrical tube 132, the lower second baffle... Plate 150 completely covers the cylindrical material cylinder 132, causing the hollow capsule 300 to move downward so that its head 310 abuts against the lower second baffle 150. When the lower second baffle 150 no longer covers the cylindrical material cylinder 132, the hollow capsule 300 falls from the lower second baffle 150 into the annular airbag 160. At the same time, the upper second baffle 150 completely covers the cylindrical material cylinder 132, thereby preventing the adjacent hollow capsule 300 from falling into the annular airbag 160 at the same time. Since the gap between the two second baffles 150 is slightly larger than the length of the hollow capsule 300, only one hollow capsule 300 is allowed to be located between the two second baffles 150 at a time, thus ensuring that only one hollow capsule 300 is held by the annular airbag 160 at a time.

[0053] It should be noted that, in order to ensure that the two first baffles 140 completely cover the flat material cylinder 131 at different times, a first rotating motor 141 is fixedly installed on the outer periphery of the flat material cylinder 131 in this embodiment, and a first connecting plate 142 is fixedly connected to the rotating shaft of the first rotating motor 141, such as... Figure 2 As shown, both ends of the first connecting plate 142 are provided with first sliding grooves 143, and the extension directions of the two first sliding grooves 143 are on the same straight line. The ends of the two first baffles 140 extending out of the flat material cylinder 131 are respectively slidably connected in the two first sliding grooves 143. In this embodiment, the first rotating motor 141 rotates at a constant angle each time, and the direction of rotation changes each time, so that when the upper first baffle 140 no longer blocks the hollow capsule 300, the lower first baffle 140 inserts into the flat material cylinder 131 to block the hollow capsule 300; similarly, in this embodiment, a second rotating motor 151 is fixedly provided on the outer periphery of the round material cylinder 132, and a second connecting plate 152 is fixedly connected to the rotating shaft of the second rotating motor 151, such as Figure 5As shown, a second groove 153 is provided on both ends of the second connecting plate 152. The two second grooves 153 extend in the same straight line. The two second baffles 150 extend out of the cylindrical tube 132 and are slidably connected in the two second grooves 153. In this embodiment, the second rotating motor 151 rotates at a constant angle each time, and the direction of rotation changes each time. This allows the upper second baffle 150 to no longer block the hollow capsule 300, while the lower second baffle 150 inserts into the cylindrical tube 132 to block the hollow capsule 300.

[0054] In a further embodiment, to ensure that the first clamping hole 230 on the lower detection plate 220 can tightly clamp the head 310 of the hollow capsule 300, a first suction pipe 231 is provided on the lower detection plate 220. The first suction pipe 231 can connect to the bottom of the first clamping hole 230. When the head 310 of the hollow capsule 300 is conveyed into the first clamping hole 230 through the feed cylinder 130, the first suction pipe 231 starts to draw air, thereby adsorbing the head 310 of the hollow capsule 300 into the first clamping hole 230, thus achieving the clamping effect. Similarly, a second suction pipe 261 is provided on the upper detection plate 250. The second suction pipe 261 can connect to the top of the second clamping hole 260. When the tail of the hollow capsule 300 enters the second clamping hole 260, the second suction pipe 261 starts to draw air, thereby adsorbing the tail of the hollow capsule 300 into the second clamping hole 260, thus achieving the clamping effect.

[0055] It should be noted that in this embodiment, the upper detection disk 250 and the lower detection disk 220 have the same shape, both being disk-shaped with protrusions on their outer periphery. The first clamping hole 230 is opened on the protrusion on the outer periphery of the lower detection disk 220, and the second clamping hole 260 is opened on the protrusion on the outer periphery of the upper detection disk 250. To facilitate the connection between the upper detection disk 250 and the lower detection disk 220, a bracket 210 is fixedly provided on the upper end face of the rotating disk 200. A support arm 240 that can slide up and down is provided on the bracket 210. A hydraulic push rod 241 is provided between the bracket 210 and the support arm 240. The extension and retraction of the hydraulic push rod 241 drives the support arm 240 to move up and down. In this embodiment, the upper detection disk 250 is rotatably mounted on the support arm 240, and the second suction pipe 261 is also provided on the support arm 240. Figure 8As shown, a push block 262 is provided on the support arm 240, and a pneumatic telescopic cylinder 263 is connected between the push block 262 and the support arm 240. When the pneumatic telescopic cylinder 263 extends or retracts, it drives the push block 262 to move up and down. The push block 262 can drive one end of the second suction pipe 261 to move up and down synchronously. A channel 264 is provided above the second clamping hole 260 of the upper detection plate 250, and a sealing ring 265 is provided at the opening of the channel 264. When the push block 262 drives one end of the second suction pipe 261 to move downward... When in motion, it can tightly abut against the sealing ring 265 and connect to the second clamping hole 260 through the channel 264, thereby adsorbing the tail of the hollow capsule 300. When it is necessary to adjust the size of the second clamping hole 260 for clamping the hollow capsule 300, the pneumatic telescopic cylinder 263 shortens and drives the push block 262 to move upward, so that the second suction pipe 261 disengages from the channel 264. Then the upper detection plate 250 rotates around its own axis so that the second clamping hole 260 of different sizes corresponds to the tail of the hollow capsule 300. The pneumatic telescopic cylinder 263 extends, causing the push block 262 to move downward. The push block 262 drives the second suction pipe 261 to connect with the second clamping hole 260. Similarly, the lower detection plate 220 is rotatably mounted on the bracket 210. When the lower detection plate 220 rotates around its own axis, it can make the first clamping holes 230 of different sizes correspond to the head 310 of the hollow capsule 300. At this time, the position of the first suction pipe 231 is fixed on the bracket 210, and the first suction pipe 231 is connected with the first clamping hole 230.

[0056] Specifically, in order for the feeding cylinder 130 to transport the hollow capsule 300 into the first clamping hole 230 on the lower detection plate 220, the feeding cylinder 130 in this embodiment is telescopically configured. There is a telescopic section 133 above the flat material cylinder 131 portion of the feeding cylinder 130. A hydraulic telescopic cylinder 134 is connected to the telescopic section 133. The telescopic cylinder 134 extends and retracts, thereby changing the overall length of the feeding cylinder 130, which allows the opening at the bottom of the feeding cylinder 130 to move up and down. To prevent the upper detection plate 250 from obstructing the lower detection plate 220 from clamping the hollow capsule 300, in this embodiment, the upper detection plate 250 is staggered with the lower detection plate 220 before the conveying cylinder 130 conveys the hollow capsule 300. Specifically, the protrusions on the outer periphery of the upper detection plate 250 and the protrusions on the outer periphery of the lower detection plate 220 are staggered, so that the opening at the bottom of the conveying cylinder 130 can convey the hollow capsule 300 into the first clamping hole 230 on the lower detection plate 220. After the conveying is completed, the length of the conveying cylinder 130 is shortened. At this time, the upper detection plate 250 rotates around its own axis so that the second clamping hole 260 corresponds to the tail of the hollow capsule 300. The lower detection plate 220 moves downward so that the tail of the hollow capsule 300 enters the second clamping hole 260, thereby avoiding interference between the upper detection plate 250 and the conveying cylinder 130.

[0057] In a further embodiment, to improve the efficiency of detecting the tightness of the hollow capsule 300, the present invention provides multiple detection units on the rotating disk 200. These detection units are evenly distributed circumferentially along the rotating disk 200. When the feeding cylinder 130 installs a hollow capsule 300 onto one of the detection units, the rotating disk 200 rotates, causing adjacent detection units to move to positions corresponding to the feeding cylinder 130, thus installing the second hollow capsule 300. This process is repeated until all detection units on the rotating disk 200 are equipped with a hollow capsule 300. After the hollow capsule 300 is inserted, the upper detection plate 250 of each detection unit moves upward relative to the lower detection plate 220, thereby pulling the head 310 and tail of the hollow capsule 300. When the head 310 and tail of the hollow capsule 300 separate, the tension sensors on the upper detection plate 250 and the lower detection plate 220 detect the tension when the head 310 and tail of the hollow capsule 300 separate, and thus calculate the tightness. By setting up multiple detection units, each detection unit detects one hollow capsule 300, the detection efficiency is greatly improved.

[0058] Specifically, to facilitate the discharge of the empty capsule 300 after testing, an air blowing pipe 232 is eccentrically provided at the bottom of the first clamping hole 230. The axis of the air blowing pipe 232 does not coincide with the axis of the first clamping hole 230. Figure 1 and Figure 5 As shown, a feeding frame 110 is provided on the frame 100. The feeding frame 110 is close to the rotating disk 200, and an inclined plate 120 is fixedly provided on one end of the feeding frame 110 near the rotating disk 200. One end of the inclined plate 120 is fixedly connected to the feeding frame 110, and the other end of the inclined plate 120 is suspended, with the suspended end higher than the other end. The suspended end of the inclined plate 120 is close to the protrusion on the outer periphery of the lower detection disk 220, that is, close to the first clamping hole 23 on the lower detection disk 220. 0. Since the bottom of the first clamping hole 230 is eccentrically provided with an air blowing pipe 232, and the air blowing pipe 232 is located on the side close to the center of the rotating disk 200, when the first clamping hole 230 moves to the suspended end near the inclined plate 120, the air blowing pipe 232 blows air, and the first suction pipe 231 stops suctioning air, so that the hollow capsule 300 can be suspended in the direction of the inclined plate 120 to fall on the inclined plate 120, and then enter the unloading frame 110 through the inclined plate 120.

[0059] It is understandable that when the upper detection plate 250 moves upward to pull the head 310 and tail of the hollow capsule 300 apart, the upper detection plate 250 will move downward again to reassemble the head 310 and tail of the hollow capsule 300 after detection, so that the air blowing pipe 232 can transport the hollow capsule 300 that has been detected in the first clamping hole 230 into the unloading frame 110.

[0060] In a further embodiment, a funnel 180 is installed on the top of the feed cylinder 130 of the present invention, and the funnel 180 facilitates the entry of the hollow capsule 300 into the feed cylinder 130.

[0061] The specific working process of the hollow capsule pre-fitting tightness tester provided by the present invention will be described in conjunction with the above embodiments:

[0062] Loading:

[0063] The operator pours the hollow capsule 300 to be tested into the funnel 180. The hollow capsule 300 enters the conveying cylinder 130 through the funnel 180. Due to the action of the two first baffles 140 on the flat material cylinder 131 of the conveying cylinder 130, the hollow capsule 300 passes through the adjusting rod 190 one by one in an orderly manner. When the hollow capsule 300 passes through the adjusting rod 190, because the head 310 of the hollow capsule 300 is slightly heavier than the tail, the hollow capsule 300 will enter the round material cylinder 132 with its head 310 facing down after passing through the adjusting rod 190. Due to the action of the two second baffles 150 on the round material cylinder 132 of the conveying cylinder 130, only one hollow capsule 300 can pass through at a time. The hollow capsule 300 that passes through the two second baffles 150 will be clamped by the annular airbag 160 at the bottom opening of the conveying cylinder 130.

[0064] Clamping:

[0065] When the feeding cylinder 130 has not yet delivered the hollow capsule 300 into the first clamping hole 230, there is a certain distance between the upper detection plate 250 and the lower detection plate 220, which is greater than the length of the hollow capsule 300. The protrusions on the outer periphery of the upper detection plate 250 and the lower detection plate 220 are staggered. The rotating disk 200 rotates, aligning the first clamping hole 230 on the lower detection plate 220 with the hollow capsule 300 clamped at the bottom opening of the feeding cylinder 130. Subsequently, the hydraulic telescopic cylinder 134 on the telescopic section 133 of the feeding cylinder 130 extends, thereby sending the head 310 of the hollow capsule 300 clamped at the bottom opening of the feeding cylinder 130 into the first clamping hole 230. The control system detects the hollow capsule 300. When the capsule enters the first clamping hole 230, the first suction pipe 231 is activated, thereby adsorbing the hollow capsule 300 into the first clamping hole 230. Then, the annular airbag 160 at the bottom opening of the conveying cylinder 130 detaches from the hollow capsule 300, and the hydraulic telescopic cylinder 134 on the telescopic section 133 of the conveying cylinder 130 shortens, moving away from the first clamping hole 230. Subsequently, the control system drives the upper detection plate 250 to rotate so that the second clamping hole 260 on the upper detection plate 250 corresponds to the tail of the hollow capsule 300. At the same time, the hydraulic push rod 241 on the bracket 210 extends, and through the support arm 240, it drives the upper detection plate 250 to move downward so that the tail of the hollow capsule 300 enters the second clamping hole 260. When the control system detects that the tail of the hollow capsule 300 has entered the second clamping hole 260, it activates the second suction pipe 261 to adsorb the tail of the hollow capsule 300 into the second clamping hole 260. Then, the rotating disk 200 rotates to begin clamping another hollow capsule 300. The above operation is repeated to clamp hollow capsules 300 between multiple lower detection disks 220 and upper detection disks 250.

[0066] Detection:

[0067] The hydraulic push rod 241 shortens, causing the upper detection plate 250 to move upward to pull the hollow capsule 300. When the head 310 and tail of the hollow capsule 300 separate, the tension sensor (not shown in the figure) between the upper detection plate 250 and the lower detection plate 220 records the tension value when they separate and transmits the data to the control system.

[0068] Material arrangement:

[0069] After the hollow capsule 300 is inspected, the hydraulic push rod 241 extends again, causing the upper inspection plate 250 to move downward, thereby merging the head 310 and tail of the hollow capsule 300. After merging, the second suction pipe 261 on the upper inspection plate 250 stops suction. Subsequently, the hydraulic push rod 241 shortens and resets, causing the tail of the hollow capsule 300 to disengage from the second clamping hole 260 of the upper inspection plate 250. The control system drives the rotating plate 200 to rotate. When the first clamping hole 230 on the lower inspection plate 220 approaches the inclined plate 120 of the unloading frame 110, the first... The suction pipe 231 stops suctioning, but the blowing pipe 232 starts working. Because the blowing pipe 232 is eccentrically set and close to the center of the rotating disk 200, the blowing pipe 232 can blow the hollow capsule 300 out at an angle. The hollow capsule 300 moves away from the center of the rotating disk 200 and falls onto the inclined plate 120. The hollow capsule 300 slides on the inclined plate 120 and falls into the feeding frame 110. Whenever the rotating disk 200 rotates to the first clamping hole 230 and is close to the inclined plate 120, the hollow capsule 300 can be discharged, thus completing the discharge operation.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A tightness tester for pre-fitting hollow capsules, characterized in that, include: A frame, on which a feeding cylinder is vertically arranged, the inside of which is used to fill hollow capsules; A sorting component for arranging the hollow capsules inside the feed cylinder with their heads facing down; A rotating disk is rotatably mounted on the frame. A detection unit is provided on the rotating disk. The detection unit includes an upper detection disk and a lower detection disk arranged coaxially. A plurality of first clamping holes are evenly opened along the circumferential direction on the lower detection disk. The size of the plurality of first clamping holes gradually increases along the circumferential direction. A plurality of second clamping holes are opened along the circumferential direction on the upper detection disk. The plurality of second clamping holes correspond one-to-one with the plurality of first clamping holes. A clamping assembly is configured to deliver the head of a single hollow capsule into the first clamping hole of a corresponding size when the feed cylinder corresponds to the first clamping hole, and the second clamping hole of the upper detection plate clamps the tail of the hollow capsule. The sorting component includes two first baffles, two second baffles, and an adjusting rod. The feeding cylinder has two parts: a flat cylinder and a round cylinder. A smooth conical surface is provided between the two parts. The adjusting rod is located above the smooth conical surface. The two first baffles are slidably disposed in the flat cylinder part of the feeding cylinder. The two second baffles are slidably disposed inside the round cylinder part of the feeding cylinder. A hollow capsule in a vertical position can be accommodated between the two second baffles, with the head of the hollow capsule facing downwards. A first rotating motor is provided on the outer periphery of the flat material cylinder of the feeding cylinder, and the rotating shaft of the first rotating motor is movably connected to two first baffles. A second rotating motor is provided on the outer periphery of the round material cylinder of the feeding cylinder, and the rotating shaft of the second rotating motor is movably connected to two second baffles. The conveying cylinder has a telescopic section, and a hydraulic telescopic cylinder is installed on the telescopic section of the conveying cylinder.

2. The tightness tester for pre-fitting hollow capsules according to claim 1, characterized in that, The clamping assembly includes an annular airbag and an air pump. The annular airbag is coaxially and fixedly disposed at the bottom of the feed cylinder. The air pump's air pipe is connected to the annular airbag. The diameter of the inner ring of the annular airbag is positively correlated with the diameter of the hollow capsule.

3. The tightness tester for pre-fitting hollow capsules according to claim 1, characterized in that, The rotating disk is provided with a bracket and a support arm. The bracket is fixedly mounted on the upper end face of the rotating disk, and the support arm is vertically slidably mounted on the bracket. The upper detection disk is rotatably mounted on the support arm, and the lower detection disk is rotatably mounted on the bracket. A hydraulic push rod is provided between the bracket and the support arm.

4. The tightness tester for pre-fitting hollow capsules according to claim 1, characterized in that, The lower detection plate is provided with a first suction pipe, which is connected to a plurality of first clamping holes. The upper detection plate is provided with a second suction pipe, which is connected to a plurality of second clamping holes.

5. The tightness tester for pre-fitting hollow capsules according to claim 1, characterized in that, There are multiple detection units, which are evenly distributed along the circumference of the rotating disk.

6. The tightness tester for pre-fitting hollow capsules according to claim 1, characterized in that, An air blowing pipe is eccentrically provided at the bottom of the first clamping hole, and a feeding frame is provided on the frame, with the feeding frame close to the outer periphery of the rotating disk.

7. The tightness tester for pre-fitting hollow capsules according to claim 1, characterized in that, A feed funnel is provided at the top of the feed cylinder.

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