Sorting mechanism suitable for sorting thin workpieces

Abstract

The utility model provides a sorting mechanism suitable for sorting thin workpieces, and belongs to the technical field of sorting of thin workpieces. Each material storage assembly comprises a material frame, the material frame is installed on the machine frame through a support or installed on a supporting frame used for supporting the conveying belt through the support, the material frames are movably connected with the supports, and the material frames are located above the conveying belt; the three-dimensional positioning assembly comprises a suction cup unit, a first moving unit for driving the suction cup unit to move in the conveying direction of the conveying belt, a second moving unit for driving the suction cup unit to move in the direction perpendicular to the conveying direction of the conveying belt, and a third moving unit for driving the suction cup unit to move in the vertical direction. According to the utility model, unqualified products with different elements can be sorted and collected.

Description

Technical Field

[0001] The utility model belongs to the technical field of thin workpiece sorting, and relates to a sorting mechanism, in particular to a sorting mechanism suitable for sorting thin workpieces. Background Art

[0002] With the development of technology, the quality requirements for thin sheet accessories used in 3C products such as glass, ceramic sheets, microcrystalline glass sheets, and sapphires are getting higher and higher. However, the thin and fragile structure of 3C thin sheets cannot withstand too much force, so as to avoid deformation or damage of thin workpieces during processing or detection.

[0003] In the prior art, when a product is detected, there is more than one detection element. If all the elements to be detected of the product to be detected are qualified, the current product is determined to be a qualified product and can be output through the channel for transmitting qualified products. However, if one or some of the elements to be detected in the product to be detected are unqualified, the current product is determined to be an unqualified product and is output through the channel for transmitting unqualified products. At this time, since the unqualified elements of the product are different, and there is only one channel for transmitting unqualified products, all unqualified products can only be output from the same channel. Such a result leads to, on the one hand, since all unqualified products are output uniformly, it is necessary to sort all unqualified products again when analyzing the reasons for unqualified products later, which is time-consuming and laborious; on the other hand, since all unqualified products are output uniformly, some unqualified products that can be turned into qualified products through repair means are mixed together, which will cause waste of materials. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above problems existing in the prior art, and provides a sorting mechanism with relatively low sorting cost and capable of classifying unqualified products with different elements.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A sorting mechanism suitable for sorting thin workpieces, comprising:

[0006] A frame, on which a conveyor belt for transmitting qualified products is arranged;

[0007] Two storage components, each storage component includes a material box for temporarily storing unqualified products corresponding to elements, and the material box is installed on the frame through a bracket, or installed on a support frame for supporting the conveyor belt through a bracket. Among them, the material box is movably connected to the bracket, and the material box is located above the conveyor belt;

[0008] The three-dimensional positioning component includes a suction cup unit for picking up products that have completed inspection at the workstation, a first moving unit for driving the suction cup unit to move along the conveyor belt transmission direction, a second moving unit for driving the suction cup unit to move perpendicular to the conveyor belt transmission direction, and a third moving unit for driving the suction cup unit to move in a vertical direction.

[0009] In the sorting mechanism applicable to thin workpieces described above, the material frame and the support are in a pull-out engagement, and the material frame can move along a direction perpendicular to the conveyor belt. When the material frame is collecting defective products, it is located directly above the conveyor belt; when it is necessary to remove defective products from the material frame, it is located diagonally above the conveyor belt.

[0010] In the sorting mechanism applicable to thin workpieces described above, the support includes two parallel support rods, and the two ends of each support rod are respectively connected to the frame or to the support frame via a support. A first sliding structure is provided between the support rod and the material frame. The first sliding structure includes a first slide rail connected to the material frame and a first slider connected to the support rod.

[0011] In the sorting mechanism applicable to thin workpieces described above, a first limiting unit is provided between the support rod and the material frame, and the first limiting unit includes a first mounting plate connected to the side wall of the material frame. Each end of the first mounting plate is connected to a first limiting part, and a limiting plate is provided on the support rod. When the material frame moves directly above the conveyor belt, one of the two first limiting parts abuts against one side of the limiting plate; when the material frame moves diagonally above the conveyor belt, the other of the two first limiting parts abuts against the other side of the limiting plate.

[0012] In the sorting mechanism applicable to thin workpiece sorting described above, the first moving unit includes a first linear motor and a second sliding structure, with the first linear motor and the second sliding structure located on opposite sides of the conveyor belt. A gantry frame is provided between the output end of the first linear motor and the second sliding structure. The gantry frame is C-shaped, and the second sliding structure includes a second slide rail and a second slider mounted on the frame. One side of the open end of the gantry frame is connected to the output end of the first linear motor, and the other side of the open end of the gantry frame is connected to the second slider. Alternatively, the second moving unit includes a second linear motor connected to the closed end of the gantry frame, with the output end of the second linear motor connected to a second mounting plate. Or, the third moving unit includes a third mounting plate movably connected to the second mounting plate, with a lifting cylinder connected to the third mounting plate. The output end of the lifting cylinder is connected to a support plate, and a suction cup unit is connected to the support plate.

[0013] In the sorting mechanism applicable to thin workpieces described above, a first connecting hole in the shape of a round hole is provided on the second mounting plate, and a second connecting hole in the shape of an oblong hole is provided on the third mounting plate. The positions of the first connecting hole and the second connecting hole correspond to each other. The horizontal height of the suction cup unit in its initial state is adjusted by changing the relative positions of the first connecting hole and the second connecting hole.

[0014] In the sorting mechanism applicable to thin workpieces described above, a second limiting unit is provided between the third mounting plate and the support plate. The second limiting unit includes second limiting parts disposed at both ends of the third mounting plate and a limiting block connected to the support plate. When the suction cup unit is adsorbing products at the suction station, or placing products on the conveyor belt or in the material frame, one of the two second limiting parts abuts against one side of the limiting block. When the suction cup unit is raised to the highest point, the other of the two second limiting parts abuts against the other side of the limiting block.

[0015] In the sorting mechanism applicable to thin workpieces described above, the suction cup unit includes a first connecting block connected to the support plate, a connecting rod connected to the first connecting block, and a second connecting block connected to both ends of the connecting rod. At least one suction cup rod is connected to the second connecting block, and one end of the suction cup rod is provided with a suction nozzle.

[0016] In the sorting mechanism applicable to thin workpieces described above, a first clamping part is provided on the first connecting block, and the connecting rod and the first connecting block are nested and clamped by the first clamping part and locked by fasteners. A second clamping part and a third clamping part are provided on the second connecting block, and the connecting rod and the second connecting block are nested and clamped by the second clamping part and locked by fasteners. The suction cup rod and the second connecting block are nested and clamped by the third clamping part and locked by fasteners.

[0017] In the sorting mechanism applicable to thin workpieces described above, the suction cup rod includes a rod connected to the second connecting block and a rotating block rotatably connected to the rod. The suction nozzle is connected to the rotating block and is provided with a gas inlet / outlet channel. The gas inlet / outlet channel is connected to a gas inlet / outlet hole provided on the rotating block. The gas inlet / outlet hole is connected to an external gas source through a pipeline.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) The present invention provides a sorting mechanism suitable for sorting thin workpieces. The material frame for collecting unqualified products and the conveyor belt for outputting qualified products are arranged vertically, so that qualified or unqualified products are placed in the same direction, thereby reducing the swing amplitude of the three-dimensional positioning component when placing qualified or unqualified products, and thus reducing the volume of the entire sorting mechanism. It is suitable for sorting in a small space area.

[0020] (2) The material frame and the support are connected by a pull-out structure, which makes it convenient for operators to take out the full load of defective products from the material frame and reset the empty material frame without having to remove the material frame from the support, saving time and effort.

[0021] (3) When there is only one detection element of the product to be tested, by setting up two storage components, the continuity of work can be guaranteed and the work efficiency can be improved; when there are two detection elements of the product to be tested, by setting up two storage components, products with different unqualified elements can be placed accordingly, thereby improving the flexibility of the sorting mechanism.

[0022] (4) The rod and the rotating block are set to rotate to change the tilt angle of the adsorption plane on the nozzle, so as to match the tilt angle of different product surfaces on the work station, ensuring that the adsorption plane on the nozzle is always in positive contact with the product surface, and improving the reliability of the product during the transfer process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a sorting mechanism applicable to sorting thin workpieces according to this utility model.

[0024] Figure 2 This is a schematic diagram of the material storage component in a preferred embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the suction cup unit and the third moving unit in a preferred embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the suction cup unit in a preferred embodiment of the present invention.

[0027] In the picture,

[0028] 100. Frame; 110. Conveyor belt; 120. Support frame;

[0029] 200, Material storage assembly; 210, Material frame; 220, Bracket; 221, Support rod; 222, Support; 230, First sliding structure; 240, First limiting unit; 241, First mounting plate; 242, First limiting part; 243, Limiting plate;

[0030] 300. Three-dimensional positioning component; 310. Suction cup unit; 311. First connecting block; 3111. First clamping part; 312. Connecting rod; 313. Second connecting block; 3131. Second clamping part; 3132. Third clamping part; 314. Suction cup rod; 3141. Suction nozzle; 3142. Rod; 3143. Rotating block; 320. First moving unit; 321. First linear motor; 322. Second sliding structure; 323. Gantry frame; 330. Second moving unit; 331. Second linear motor; 332. Second mounting plate; 3321. First connecting hole; 340. Third moving unit; 341. Third mounting plate; 3411. Second connecting hole; 342. Lifting cylinder; 343. Support plate; 344. Third sliding structure; 345. Second limiting unit; 3451. Second limiting part; 3452. Limiting block. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] like Figures 1 to 4 As shown, the present invention provides a sorting mechanism suitable for sorting thin workpieces, comprising:

[0034] A frame 100 is provided with a conveyor belt 110 for transporting qualified products.

[0035] At least one storage assembly 200 includes a material frame 210 for temporarily storing defective products, and the material frame 210 is mounted on the frame 100 via a bracket 220, or mounted on a support frame 120 for supporting the conveyor belt 110 via a bracket 220, wherein the material frame 210 and the bracket 220 are movably connected, and the material frame 210 is located above the conveyor belt 110;

[0036] The three-dimensional positioning component 300 includes a suction cup unit 310 for picking up products that have completed inspection at the workstation, a first moving unit 320 for driving the suction cup unit 310 to move along the transmission direction of the conveyor belt 110, a second moving unit 330 for driving the suction cup unit 310 to move perpendicular to the transmission direction of the conveyor belt 110, and a third moving unit 340 for driving the suction cup unit 310 to move in a vertical direction.

[0037] This utility model provides a sorting mechanism suitable for sorting thin workpieces. The material frame 210 for collecting defective products and the conveyor belt 110 for outputting qualified products are arranged vertically, so that they are in the same direction when placing qualified or defective products. This reduces the swing amplitude of the three-dimensional positioning component 300 when placing qualified or defective products, thereby reducing the volume of the entire sorting mechanism. It is suitable for sorting in a small space.

[0038] More preferably, the material frame 210 and the bracket 220 are in a pull-out engagement, and the material frame 210 can move along a direction perpendicular to the conveyor belt 110. When the material frame 210 is collecting defective products, the material frame 210 is located directly above the conveyor belt 110; when it is necessary to remove defective products from the material frame 210, the material frame 210 is located diagonally above the conveyor belt 110.

[0039] In this embodiment, the material frame 210 and the support 220 are connected by a pull-out structure, which makes it convenient for operators to remove the full load of defective products from the material frame 210 and reset the empty material frame 210 without having to remove the material frame 210 from the support 220, saving time and effort.

[0040] Furthermore, the bracket 220 includes two parallel support rods 221, and the two ends of each support rod 221 are connected to the frame 100 or the support frame 120 respectively through the support 222. A first sliding structure 230 is provided between the support rod 221 and the material frame 210. The first sliding structure 230 includes a first slide rail connected to the material frame 210 and a first slider connected to the support rod 221.

[0041] It is worth mentioning that the connection positions of the first slide rail and the first slider can be interchanged, that is, the first slide rail is connected to the support rod 221 and the first slider is connected to the material frame 210.

[0042] Preferably, a first limiting unit 240 is further provided between the support rod 221 and the material frame 210, and the first limiting unit 240 includes a first mounting plate 241 connected to the side wall of the material frame 210, wherein a first limiting part 242 is connected to each end along the length direction of the first mounting plate 241, and a limiting plate 243 is provided on the support rod 221. When the material frame 210 moves directly above the conveyor belt 110, one of the two first limiting parts 242 abuts against one side of the limiting plate 243; when the material frame 210 moves diagonally above the conveyor belt 110, the other of the two first limiting parts 242 abuts against the other side of the limiting plate 243.

[0043] It is worth mentioning that the movement of the material frame 210 is controlled by the corresponding abutment of the two first limiting parts 242 and the limiting plate 243 on both sides, thereby improving the accuracy of the movement of the material frame 210.

[0044] In addition, since the first sliding structure 230 described above is also provided between the support rod 221 and the material frame 210, in order to make the structure compact, the first slide rail can be connected to the first mounting plate 241 and the first slider can be connected to the limiting plate 243.

[0045] Preferably, there are two material storage components 200, and the two material storage components 200 are arranged side by side. The two material storage components 200 are arranged independently, or the support rods 221 of the two material storage components 200 that are close to each other share a support 222, or the side of the two material storage components 200 that are close to each other shares a support rod 221 and a support 222.

[0046] In this embodiment, when there is only one detection element for the product to be inspected, the continuity of work and the efficiency can be improved by setting two storage components 200; when there are two detection elements for the product to be inspected, the two storage components 200 can be set up to place products that are not qualified for different elements, thereby improving the flexibility of the sorting mechanism.

[0047] The structures of the first moving unit 320, the second moving unit 330, and the third moving unit 340 are all designed to position the suction cup unit 310 in space. The positioning methods can be varied, and the following description is just one of them, but it is not limited to the positioning method described below.

[0048] Preferably, the first moving unit 320 includes a first linear motor 321 and a second sliding structure 322, and the first linear motor 321 and the second sliding structure 322 are respectively located on both sides of the conveyor belt 110. A gantry frame 323 is provided between the output end of the first linear motor 321 and the second sliding structure 322. The gantry frame 323 is C-shaped. The second sliding structure 322 includes a second slide rail and a second slider mounted on the frame 100. One side of the open end of the gantry frame 323 is connected to the output end of the first linear motor 321, and the other side of the open end of the gantry frame 323 is connected to the second slider.

[0049] Preferably, the second moving unit 330 includes a second linear motor 331 connected to the closed end of the gantry 323, and the output end of the second linear motor 331 is connected to a second mounting plate 332.

[0050] Preferably, the third moving unit 340 includes a third mounting plate 341 movably connected to the second mounting plate 332, and a lifting cylinder 342 is connected to the third mounting plate 341. The output end of the lifting cylinder 342 is connected to a support plate 343, and the suction cup unit 310 is connected to the support plate 343.

[0051] Furthermore, a third sliding structure 344 is provided between the support plate 343 and the third mounting plate 341, and the third sliding structure 344 includes a third slide rail connected to the third mounting plate 341 and a third slider connected to the support plate 343.

[0052] Furthermore, the second mounting plate 332 is provided with a first connecting hole 3321 in the shape of a round hole, and the third mounting plate 341 is provided with a second connecting hole 3411 in the shape of an oblong hole. The position of the first connecting hole 3321 corresponds to the position of the second connecting hole 3411. The horizontal height of the suction cup unit 310 in its initial state is adjusted by changing the relative position of the first connecting hole 3321 and the second connecting hole 3411.

[0053] Furthermore, a second limiting unit 345 is provided between the third mounting plate 341 and the support plate 343. The second limiting unit 345 includes a second limiting part 3451 disposed at both ends of the third mounting plate 341 and a limiting block 3452 connected to the support plate 343. When the suction cup unit 310 is adsorbing a product at the suction station, or placing the product in the conveyor belt 110 or the material frame 210, one of the two second limiting parts 3451 abuts against one side of the limiting block 3452. When the suction cup unit 310 is raised to the highest point, the other of the two second limiting parts 3451 abuts against the other side of the limiting block 3452.

[0054] Preferably, the suction cup unit 310 includes a first connecting block 311 connected to the support plate 343, a connecting rod 312 connected to the first connecting block 311, and a second connecting block 313 connected to both ends of the connecting rod 312. At least one suction cup rod 314 is connected to the second connecting block 313, and one end of the suction cup rod 314 is provided with a suction nozzle 3141.

[0055] More preferably, the first connecting block 311 is provided with a first clamping part 3111, and the connecting rod 312 and the first connecting block 311 are nested and clamped by the first clamping part 3111 and locked by fasteners. The second connecting block 313 is provided with a second clamping part 3131 and a third clamping part 3132, and the connecting rod 312 and the second connecting block 313 are nested and clamped by the second clamping part 3131 and locked by fasteners. The suction cup rod 314 and the second connecting block 313 are nested and clamped by the third clamping part 3132 and locked by fasteners.

[0056] Furthermore, the suction cup rod 314 includes a rod 3142 connected to the second connecting block 313, and a rotating block 3143 rotatably connected to the rod 3142. The suction nozzle 3141 is connected to the rotating block 3143, and the suction nozzle 3141 is provided with a gas inlet / outlet channel. This gas inlet / outlet channel communicates with a gas inlet / outlet hole provided on the rotating block 3143. This gas inlet / outlet hole is connected to an external air source through a pipeline. Preferably, the external air source can be an air pump.

[0057] It is worth mentioning that the rod 3142 and the rotating block 3143 are movably connected, typically by rotation. The relative rotation between them changes the angle between the axis of the rod 3142 and the axis of the rotating block 3143, which is then locked by fasteners. By making the rod 3142 and the rotating block 3143 a movable structure, the tilt angle of the suction surface on the nozzle 3141 can be changed. This matches the tilt angle of different product surfaces at the workstation, ensuring that the suction surface on the nozzle 3141 always contacts the product surface positively, thus improving the reliability of the product during the transfer process.

[0058] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0060] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A sorting mechanism suitable for sorting thin workpieces, characterized in that, include: A frame on which a conveyor belt is installed to transport qualified products; Two storage components, each including a material frame for temporarily storing products that are non-conforming to the corresponding element, and the material frame is mounted on the frame by a bracket or on a support frame for supporting the conveyor belt by a bracket, wherein the material frame and the bracket are movably connected and the material frame is located above the conveyor belt; The three-dimensional positioning component includes a suction cup unit for picking up products that have completed inspection at the workstation, a first moving unit for driving the suction cup unit to move along the conveyor belt transmission direction, a second moving unit for driving the suction cup unit to move perpendicular to the conveyor belt transmission direction, and a third moving unit for driving the suction cup unit to move in a vertical direction.

2. The sorting mechanism for sorting thin workpieces according to claim 1, characterized in that, The material frame and the support are connected by a pull-out mechanism, and the material frame can move perpendicular to the conveyor belt transmission direction. When the material frame is collecting defective products, it is located directly above the conveyor belt; when it is necessary to remove defective products from the material frame, it is located diagonally above the conveyor belt.

3. The sorting mechanism for sorting thin workpieces according to claim 2, characterized in that, The bracket includes two parallel support rods, and the two ends of each support rod are connected to the frame or the support frame via supports. A first sliding structure is provided between the support rod and the material frame. The first sliding structure includes a first slide rail connected to the material frame and a first slider connected to the support rod.

4. The sorting mechanism for sorting thin workpieces according to claim 2, characterized in that, A first limiting unit is provided between the support rod and the material frame, and the first limiting unit includes a first mounting plate connected to the side wall of the material frame. Each end of the first mounting plate is connected to a first limiting part, and a limiting plate is provided on the support rod. When the material frame moves directly above the conveyor belt, one of the two first limiting parts abuts against one side of the limiting plate; when the material frame moves diagonally above the conveyor belt, the other of the two first limiting parts abuts against the other side of the limiting plate.

5. The sorting mechanism for sorting thin workpieces according to any one of claims 1 to 4, characterized in that, The first moving unit includes a first linear motor and a second sliding structure, with the first linear motor and the second sliding structure located on opposite sides of the conveyor belt. A gantry frame, C-shaped, is provided between the output end of the first linear motor and the second sliding structure. The second sliding structure includes a second slide rail and a second slider mounted on a frame. One side of the open end of the gantry frame is connected to the output end of the first linear motor, and the other side of the open end of the gantry frame is connected to the second slider. Alternatively, the second moving unit includes a second linear motor connected to the closed end of the gantry frame, with the output end of the second linear motor connected to a second mounting plate. Or, the third moving unit includes a third mounting plate movably connected to the second mounting plate, with a lifting cylinder connected to the third mounting plate. The output end of the lifting cylinder is connected to a support plate, and a suction cup unit is connected to the support plate.

6. The sorting mechanism for sorting thin workpieces according to claim 5, characterized in that, The second mounting plate is provided with a first connecting hole in the shape of a circle, and the third mounting plate is provided with a second connecting hole in the shape of an elongated circle. The positions of the first connecting hole and the second connecting hole correspond to each other. The horizontal height of the suction cup unit in its initial state is adjusted by changing the relative positions of the first connecting hole and the second connecting hole.

7. The sorting mechanism for sorting thin workpieces according to claim 5, characterized in that, A second limiting unit is provided between the third mounting plate and the support plate. The second limiting unit includes second limiting parts disposed at both ends of the third mounting plate and a limiting block connected to the support plate. When the suction cup unit is adsorbing products at the work station, or placing products in the conveyor belt or material frame, one of the two second limiting parts abuts against one side of the limiting block. When the suction cup unit is raised to the highest point, the other of the two second limiting parts abuts against the other side of the limiting block.

8. The sorting mechanism for sorting thin workpieces according to claim 5, characterized in that, The suction cup unit includes a first connecting block connected to the support plate, a connecting rod connected to the first connecting block, and a second connecting block connected to both ends of the connecting rod. At least one suction cup rod is connected to the second connecting block, and a suction nozzle is provided at one end of the suction cup rod.

9. The sorting mechanism for sorting thin workpieces according to claim 8, characterized in that, The first connecting block is provided with a first clamping part, and the connecting rod and the first connecting block are nested and clamped by the first clamping part and locked by fasteners. The second connecting block is provided with a second clamping part and a third clamping part, and the connecting rod and the second connecting block are nested and clamped by the second clamping part and locked by fasteners. The suction cup rod and the second connecting block are nested and clamped by the third clamping part and locked by fasteners.

10. The sorting mechanism for sorting thin workpieces according to claim 8, characterized in that, The suction cup rod includes a rod connected to the second connecting block and a rotating block rotatably connected to the rod. The suction nozzle is connected to the rotating block and is provided with a gas inlet and outlet channel. The gas inlet and outlet channel is connected to a gas inlet and outlet hole provided on the rotating block. The gas inlet and outlet hole is connected to an external gas source through a pipeline.

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