A quality inspection system and a quality inspection method thereof

Abstract

The present invention relates to the technical field of ball valve quality inspection equipment, and more specifically, to a quality inspection system and its inspection method, wherein the system comprises a reciprocating conveying device, and a material taking device and a torque detection device are respectively arranged at both ends of the reciprocating conveying device; an air tightness detection device is also arranged on the reciprocating conveying device; wherein the air tightness detection device comprises a first air tightness detection station arranged to detect whether the ball valve handle is leaking, a second air tightness detection station arranged to detect whether one side of the ball valve is leaking, a third air tightness detection station arranged to detect whether the other side of the ball valve is leaking, and a fourth air tightness detection station arranged to detect whether the ball valve core is leaking; the quality inspection system also comprises a control device. The present invention can be used to detect the specific leakage position of the ball valve, can provide specific information of unqualified products for the assembly process, and improve the efficiency of ball valve repair.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valve quality inspection equipment, and more specifically, to a quality inspection system and an inspection method thereof. Background Art

[0002] After assembly, the quality of PVC plastic ball valves in the current industry needs to be tested, including sealing performance testing, torque testing, etc. Only ball valves that have passed all the tests can be packaged and sold. The existing equipment in the industry that uses inflation to detect the leakage of PVC ball valves can only be used to detect the sealing performance of PVC plastic ball valves in a certain state such as opening and closing, and cannot detect and identify the specific leakage of the ball valve.

[0003] The prior art discloses a ball valve air tightness test fixture, including a water tank, a support frame is fixedly provided in the water tank, a lifting cylinder for controlling the lifting of the lifting work frame is fixedly provided on the support frame, the lifting work frame includes an upper top plate and a lower support plate, a lower pad is provided on the upper surface of the lower support plate, a pressure test gas interface is provided on the lower pad, the pressure test gas interface is connected to the product to be tested provided on the lower pad, a clamping cylinder is provided on the lower surface of the upper top plate, and the position of the clamping cylinder corresponds to the position of the lower pad. The present invention has low work intensity when in use, and the test personnel are not easily fatigued. It can test one or multiple products to be tested at the same time, and can significantly improve the work efficiency of the test.

[0004] However, the above solution cannot be used to detect the specific leakage location of the ball valve, and it is difficult to feedback the specific information of unqualified products. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a quality inspection system and inspection method thereof, which can be used to detect the specific leakage position of a ball valve, provide specific information of unqualified products for the assembly process, and improve the efficiency of ball valve repair.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A quality inspection system is provided, comprising a reciprocating conveying device, wherein two ends of the reciprocating conveying device are respectively provided with a material picking device and a torque detection device; the reciprocating conveying device is also provided with an air-tightness detection device; wherein the air-tightness detection device comprises a first air-tightness detection station arranged to detect whether a ball valve handle is leaking, a second air-tightness detection station to detect whether one side of the ball valve is leaking, a third air-tightness detection station to detect whether the other side of the ball valve is leaking, and a fourth air-tightness detection station to detect whether a ball valve core is leaking; the quality inspection system also comprises a control device and a frame, wherein the material picking device, the reciprocating conveying device, the air-tightness detection device and the torque detection device are all communicatively connected with the control device, and the material picking device, the reciprocating conveying device, the air-tightness detection device and the torque detection device are all overlapped through the frame.

[0008] Preferably, the first air tightness detection station includes a first clamping and inflating mechanism, a first rotating and locking mechanism, a third lifting mechanism, and a first air pressure detection component which are communicatively connected to the control device; the first clamping and inflating mechanism is used to clamp and inflate the ball valve, and it is installed on the frame; the first rotating and locking mechanism is used to rotate the ball valve handle, and it is connected to the frame through the third lifting mechanism; the detection end of the first air pressure detection component is arranged at the inflation end of the first clamping and inflating mechanism.

[0009] Preferably, the first clamping and inflating mechanism includes a first clamping plate, a second clamping plate, a first telescopic component connected to the first clamping plate, and a second telescopic component connected to the second clamping plate; the first telescopic component and the second telescopic component are respectively located on both sides of the reciprocating conveying device; the first clamping plate and the second clamping plate are both connected with a first sealing and inflating component, and the first sealing and inflating component is used to connect to an air source; the first rotating positioning mechanism includes a first clamping block and a first rotating cylinder respectively connected to a lifting end and a fixed end of the third lifting mechanism, and the first clamping block is transmission-connected to the first rotating cylinder; the first clamping block is located above the first clamping and inflating mechanism; the detection end of the first air pressure detection component is arranged at the first sealing and inflating component; the first telescopic component, the second telescopic component and the first rotating cylinder are all communicatively connected to a control device.

[0010] Preferably, the second air-tightness detection station includes a second clamping and inflating mechanism, a second rotating and locking mechanism, a fourth lifting mechanism, and a second air pressure detection member that are communicatively connected to the control device; wherein: the second clamping and inflating mechanism includes a third clamping plate, a fourth clamping plate, a third telescopic component connected to the third clamping plate, and a fourth telescopic component connected to the fourth clamping plate; the third telescopic component and the fourth telescopic component are respectively located on both sides of the reciprocating conveying device; a second sealing and inflating member for connecting to an air source is connected to the third clamping plate or the fourth clamping plate, and the second sealing and inflating member is located on the first side of the reciprocating conveying device; the detection end of the second air pressure detection member is arranged at the second sealing and inflating member; the third air-tightness detection station The position includes a third clamping and inflating mechanism and a third air pressure detection component which are communicatively connected to the control device; wherein: the third clamping and inflating mechanism includes a fifth clamping plate, a sixth clamping plate, a fifth telescopic component connected to the fifth clamping plate, and a sixth telescopic component connected to the sixth clamping plate; the fifth telescopic component and the sixth telescopic component are respectively located on both sides of the reciprocating conveying device; the fifth clamping plate or the sixth clamping plate is connected to a third sealing and inflating component for connecting to an air source, and the third sealing and inflating component is located on the second side of the reciprocating conveying device; the detection end of the third air pressure detection component is arranged at the third sealing and inflating component; the third telescopic component, the fourth telescopic component, the fifth telescopic component and the sixth telescopic component are all communicatively connected to the control device.

[0011] Preferably, the reciprocating conveying device includes a reciprocating motion mechanism, a second lifting mechanism, a positioning mechanism, and an anti-collision mechanism which are communicatively connected to the control device; the positioning mechanism is connected to the moving end of the reciprocating motion mechanism through the second lifting mechanism, the fixed end of the reciprocating motion mechanism is connected to the frame, and the anti-collision mechanism is located at both ends of the reciprocating motion mechanism.

[0012] Preferably, the reciprocating motion mechanism includes a first guide rail mounted on the frame, a first slider slidably connected to the first guide rail, and also includes a material moving cylinder; the second lifting mechanism includes a first base plate and a second lifting cylinder, the first base plate is connected to the first slider, and the frame and the first base plate are connected through the material moving cylinder; the positioning mechanism includes a seat plate, and a plurality of second clamping cylinders mounted on the seat plate, the clamping ends of the second clamping cylinders are arranged upward; the seat plate and the first base plate are connected through the second lifting cylinder; the anti-collision mechanism includes a collision block and a buffer, the collision block is mounted at both ends of the first base plate, the buffer is mounted on the frame, and the buffer end of the buffer faces the collision block; the material moving cylinder, the second lifting cylinder, and the second clamping cylinder are all communicatively connected to the control device.

[0013] Preferably, the material picking device includes a first clamping cylinder, a first lifting mechanism, and a first horizontal conveying mechanism which are communicatively connected to the control device; the first clamping cylinder is connected to the conveying end of the first horizontal conveying mechanism through the first lifting mechanism, and the clamping end of the first clamping cylinder is arranged downward; the fixed end of the first horizontal conveying mechanism is mounted on the frame.

[0014] Preferably, the torque detection device includes a second clamping mechanism, a rotating drive mechanism, and a sixth lifting mechanism which are communicatively connected to the control device, the sixth lifting mechanism is located above the second clamping mechanism, and the second clamping mechanism is mounted on the frame; the fixed end of the sixth lifting mechanism is connected to the rotating drive mechanism, a fourth clamping block is connected to the lifting end of the sixth lifting mechanism, and the fourth clamping block is transmission-connected to the rotating drive mechanism; the fixed end of the sixth lifting mechanism is connected to the frame.

[0015] Preferably, the system also includes a differentiated unloading device located below the frame, and the differentiated unloading device is communicatively connected to the control device; wherein: the differentiated unloading device includes a first unloading hopper, a second unloading hopper, and a connecting frame; the first unloading hopper is connected to the connecting frame, the middle part of the second unloading hopper is hinged to the connecting frame, and one end of the second unloading hopper is connected to the connecting frame through a seventh lifting mechanism; the seventh lifting mechanism is communicatively connected to the control device.

[0016] The present invention also provides a detection method of a quality detection system, characterized in that it comprises the following steps:

[0017] S1. The control device controls the material taking device to take the ball valve to be tested in sequence and place it at the reciprocating conveyor;

[0018] S2. The control device controls the reciprocating conveying device to convey the ball valve to the first air tightness testing station; the first air tightness testing station clamps the two ends of the ball valve, then turns the ball valve handle to put the ball valve in a conducting state, and seals and inflates the two ends of the ball valve at the same time; during the sealing and inflating process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the control device marks the current ball valve as "ball valve handle qualified", otherwise the control device marks the current ball valve as "ball valve handle unqualified" and transports it to the unqualified product area through the reciprocating conveying device;

[0019] S3. The control device controls the reciprocating conveying device to convey the ball valve marked as "ball valve handle qualified" to the second air tightness testing station; the second air tightness testing station clamps the two ends of the ball valve, then turns the ball valve handle to close the ball valve, and seals and inflates one end of the ball valve at the same time; during the sealing and inflation process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the control device marks the current ball valve as "ball valve end A qualified", otherwise the control device marks the current ball valve as "ball valve end A unqualified" and transports it to the unqualified product area through the reciprocating conveying device;

[0020] S4. The control device controls the reciprocating conveying device to convey the ball valve marked as "ball valve end A is qualified" to the third air tightness detection station; the third air tightness detection station clamps the two ends of the ball valve and seals and inflates the other end of the ball valve at the same time; the air pressure at the ball valve is detected in real time during the sealing and inflation process. If the air pressure value can remain stable within a certain range, the control device marks the current ball valve as "ball valve end B is qualified", otherwise the control device marks the current ball valve as "ball valve end B is unqualified" and transports it to the unqualified product area through the reciprocating conveying device;

[0021] S5. The control device controls the reciprocating conveying device to convey the ball valve marked as "end B of the ball valve is qualified" to the fourth air tightness testing station; the fourth air tightness testing station clamps the two ends of the ball valve, then turns the ball valve handle to put the ball valve in a conducting state again, and detects the air pressure at the ball valve in real time. If the air volume of the ball valve reaches the standard value related to its specifications, the control device marks the current ball valve as "ball valve core qualified", otherwise the control device marks the current ball valve as "ball valve core unqualified" and transports it to the unqualified product area through the reciprocating conveying device;

[0022] S6. The control device controls the reciprocating conveying device to convey the ball valve marked as "ball valve core qualified" to the torque detection device; the torque detection device clamps the two ends of the ball valve, and twists the ball valve handle with the corresponding torque set according to the ball valve specification. If the ball valve handle can be twisted under the corresponding torque, the control device marks the current ball valve as "ball valve handle torque qualified", otherwise the control device marks the current ball valve as "ball valve handle torque unqualified" and transports it to the unqualified product area through the reciprocating conveying device;

[0023] S7. The control device controls the reciprocating conveying device to convey the ball valves marked as "ball valve handle torque qualified" to the qualified product area.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention relates to a quality inspection system and an inspection method thereof. The material picking device can be used to pick up materials for ball valves to be inspected in sequence; the reciprocating conveying device can be used to convey the ball valves to be inspected; the first air tightness inspection station can be used to detect whether the ball valve handle is leaking, the second air tightness inspection station and the third air tightness inspection station can be used to detect whether the two sides of the ball valve are leaking respectively, and the fourth air tightness inspection station can be used to detect whether the ball valve core is leaking; and the torque detection device can be used to detect whether the torque of the ball valve handle is too tight; the system also includes a control device, which can be used to perform integrated control on the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A front view of a quality inspection system of the present invention;

[0027] Figure 2 for Figure 1 A top view of

[0028] Figure 3 It is a partial structural schematic diagram of a quality inspection system of the present invention;

[0029] Figure 4 for Figure 3 An enlarged schematic diagram of part I;

[0030] Figure 5 for Figure 3 A magnified schematic diagram of the middle J section;

[0031] Figure 6 It is a partial structural schematic diagram of the reciprocating conveying device of the present invention;

[0032] Figure 7 This is a structural schematic diagram of a quality inspection system embodiment 1 of the present invention;

[0033] Figure 8 for Figure 7 A magnified schematic diagram of the K portion;

[0034] Fig. 9 It is a schematic diagram of the structure of the second air tightness detection station and the third air tightness detection station of the present invention;

[0035] Fig.10 It is a partial structural schematic diagram of a quality inspection system of the present invention;

[0036] Fig.11 for Fig.10 An enlarged schematic diagram of the L portion;

[0037] Fig.12 for Fig.10 A magnified schematic diagram of the middle M part;

[0038] Fig.13 This is a structural schematic diagram of a quality inspection system embodiment 5 of the present invention;

[0039] Fig.14 It is a structural schematic diagram of the present invention to distinguish the unloading device;

[0040] Fig.15 The present invention is a flow chart of a detection method of a quality detection system.

[0041] The illustrations are as follows:

[0042] 1- material taking device, 11- first clamping cylinder, 12- first lifting mechanism, 13- first horizontal conveying mechanism, 2- reciprocating conveying device, 21- reciprocating motion mechanism, 211- first guide rail, 212- first slider, 213- material moving cylinder, 22- second lifting mechanism, 221- first substrate, 222- second lifting cylinder, 23- positioning mechanism, 231- seat plate, 232- second clamping cylinder, 24- anti-collision mechanism, 241- collision block, 242- buffer, 25- first guide member, 251- guide sleeve, 252- guide column, 3- first air tightness detection station, 31- first clamping and inflating mechanism, 311- The first clamping plate, 312-the second clamping plate, 313-the first telescopic component, 314-the second telescopic component, 315-the first sealing and inflating member, 32-the first rotating positioning mechanism, 321-the first clamping block, 322-the first rotating cylinder, 33-the third lifting mechanism, 331-the second substrate, 332-the third substrate, 333-the third lifting cylinder, 334-the second guide member, 34-the first air pressure detection member, 4-the second air tightness detection station, 41-the second clamping and inflating mechanism, 411-the third clamping plate, 412-the fourth clamping plate, 413-the third telescopic component, The fourth telescopic component, 414-the fourth telescopic component, 415-the second sealing and inflating component, 42-the second rotating clamping mechanism, 421-the second clamping block, 43-the fourth lifting mechanism, 44-the second air pressure detection component, 5-the third air tightness detection station, 51-the third clamping and inflating mechanism, 511-the fifth clamping plate, 512-the sixth clamping plate, 513-the fifth telescopic component, 514-the sixth telescopic component, 515-the third sealing and inflating component, 52-the third air pressure detection component, 6-the fourth air tightness detection station, 61-the first clamping mechanism, 62-the third rotating clamping mechanism, 621-the third clamping block, 63-the fifth lifting mechanism, 64-the fourth air pressure detection member, 7-the torque detection device, 71-the second clamping mechanism, 711-the first clamping block, 712-the second clamping block, 713-the ninth telescopic component, 714-the tenth telescopic component, 72-the rotation drive mechanism, 721-the servo motor, 722-the reducer, 73-the sixth lifting mechanism, 74-the fourth clamping block, 8-the material classification and unloading device, 81-the first dropping hopper, 82-the second dropping hopper, 83-the connecting frame, 84-the seventh lifting mechanism, 85-the first sub-hopper, 86-the second sub-hopper, 9-the frame, 91-the bottom plate, 92-the frame. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0044] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0045] Example 1

[0046] like Figure 1 The first embodiment of a quality inspection system of the present invention is shown, which includes a reciprocating conveying device 2, and a material picking device 1 and a torque detection device 7 are respectively provided at both ends of the reciprocating conveying device 2; an air tightness detection device is also provided on the reciprocating conveying device 2; wherein the air tightness detection device includes a first air tightness detection station 3 arranged to detect whether the ball valve handle is leaking, a second air tightness detection station 4 for detecting whether one side of the ball valve is leaking, a third air tightness detection station 5 for detecting whether the other side of the ball valve is leaking, and a fourth air tightness detection station 6 for detecting whether the ball valve core is leaking; wherein the quality inspection system also includes a frame 9, and the material picking device 1, the reciprocating conveying device 2, the air tightness detection device, and the torque detection device 7 are all overlapped through the frame 9. In this embodiment, the quality inspection system also includes a control device, specifically, the control device is a PLC controller, and the material picking device 1, the reciprocating conveying device 2, the air tightness detection device, and the torque detection device 7 are all electrically connected to the PLC controller.

[0047] The material picking device 1 can be used to pick up the ball valves to be tested in sequence; the reciprocating conveying device 2 can be used to convey the ball valves to be tested; the first air tightness testing station 3 can be used to detect whether the ball valve handle is leaking, the second air tightness testing station 4 and the third air tightness testing station 5 can be used to detect whether the two sides of the ball valve are leaking respectively, and the fourth air tightness testing station 6 can be used to detect whether the ball valve core is leaking; and the torque detection device 7 can be used to detect whether the torque of the ball valve handle is too tight; the system also includes a control device, which can be used to integrate and control the entire system.

[0048] Example 2

[0049] This embodiment is similar to embodiment 1, except that Figure 2 , Figures 7 to 11As shown, in this embodiment, the first air tightness detection station 3 includes a first clamping and inflating mechanism 31, a first rotating and locking mechanism 32, a third lifting mechanism 33, and a first air pressure detection component 34 electrically connected to the PLC controller; the first clamping and inflating mechanism 31 is used to clamp and inflate both ends of the ball valve, and it is installed on the frame 9; the first rotating and locking mechanism 32 is used to rotate the ball valve handle, and it is connected to the frame 9 through the third lifting mechanism 33; the detection end of the first air pressure detection component 34 is arranged at the inflation end of the first clamping and inflating mechanism 31.

[0050] Specifically, the first clamping and inflating mechanism 31 includes a first clamping plate 311, a second clamping plate 312, a first telescopic assembly 313 connected to the first clamping plate 311, and a second telescopic assembly 314 connected to the second clamping plate 312; the first telescopic assembly 313 and the second telescopic assembly 314 are respectively located on both sides of the reciprocating conveyor 2; the first clamping plate 311 and the second clamping plate 312 are both connected to a first sealing and inflating member 315, and the first sealing and inflating member 315 is used to connect to an air source. Figure 8 As shown, in this embodiment, the first telescopic component 313 is a first telescopic cylinder, and the second telescopic component 314 is a second telescopic cylinder. The first telescopic cylinder and the second telescopic cylinder are respectively installed on both sides of the reciprocating conveying device 2 through a mounting seat; it should be noted that the two sides of the reciprocating conveying device 2 refer to the two sides along the reciprocating motion direction of the reciprocating conveying device 2. The first telescopic cylinder and the second telescopic cylinder are arranged relative to each other, so that the first clamping plate 311 and the second clamping plate 312 respectively connected to the first telescopic cylinder and the second telescopic cylinder can move relative to each other to achieve a clamping action. The first sealing and inflating member 315 is a first sealing and inflating seat, and the first clamping plate 311 and the second clamping plate 312 are both provided with a first sealing and inflating seat for connecting to an air source. The first telescopic cylinder and the second telescopic cylinder drive the first clamping plate 311 and the second clamping plate 312 to approach each other, so that the first sealing and inflating seat arranged thereon can clamp at both ends of the ball valve to inflate the inside of the ball valve. In this embodiment, the first air pressure detection member 34 is a first pressure sensor, and the detection end of the first pressure sensor extends into the vicinity of the ball valve and can be used to detect the pressure value in the ball valve. In this embodiment, the first telescopic cylinder, the second telescopic cylinder, and the first pressure sensor are all electrically connected to the PLC controller.

[0051] Specifically, the first rotating locking mechanism 32 includes a first locking block 321 and a first rotating cylinder 322 which are respectively connected to the lifting end and the fixed end of the third lifting mechanism 33, and the first locking block 321 is transmission-connected to the first rotating cylinder 322; the first locking block 321 is located above the first clamping and inflating mechanism 31; the first rotating cylinder 322 is electrically connected to the PLC controller.

[0052] Specifically, the third lifting mechanism 33 includes a second base plate 331, a third base plate 332 located directly below the second base plate 331, and a third lifting cylinder 333. The cylinder seat of the third lifting cylinder 333 is connected to the second base plate 331, and the piston rod of the third lifting cylinder 333 is connected to the third base plate 332. The second base plate 331 and the third base plate 332 are also connected by a plurality of second guide members 334, such as Fig.11 As shown, the second guide member 334 is a guide post and guide sleeve structure. In this embodiment, the first clamping block 321 is connected to the lower part of the third base plate 332 through a bearing, the first rotary cylinder 322 is installed on the upper surface of the second base plate 331, and the first rotary cylinder 322 and the first clamping block 321 are connected through a transmission member; the first clamping block 321 is provided with a notch structure for clamping with the ball valve handle.

[0053] In this embodiment, the transmission member includes a sleeve and a rotating shaft circumferentially clamped in the sleeve, and the rotating shaft can be extended or retracted in the sleeve along the axial direction; the sleeve is connected to the driving end of the first rotating cylinder 322, and the rotating shaft passes through the third base plate 332 and is connected to the first clamping block 321; when the first rotating cylinder 322 is driven, the first clamping block 321 is driven to rotate through the sleeve and the rotating shaft in turn. In order to improve the smoothness of the rotation of the first clamping block 321, the rotating shaft is connected to the third base plate 332 through a bearing.

[0054] like Figure 2 and Fig. 9 As shown, the second air tightness testing station 4 is similar to the first air tightness testing station 3. The second air tightness testing station 4 includes a second clamping and inflating mechanism 41, a second rotating and locking mechanism 42, a fourth lifting mechanism 43, and a second air pressure detecting member 44 electrically connected to the PLC controller; the second clamping and inflating mechanism 41 is used to clamp and inflate one end of the ball valve, and it is installed on the frame 9; the second rotating and locking mechanism 42 is used to rotate the ball valve handle, and it is connected to the frame 9 through the fourth lifting mechanism 43; the detection end of the second air pressure detecting member 44 is arranged at the inflation end of the second clamping and inflating mechanism 41.

[0055] Specifically, the second clamping and inflating mechanism 41 includes a third clamping plate 411, a fourth clamping plate 412, a third telescopic assembly 413 connected to the third clamping plate 411, and a fourth telescopic assembly 414 connected to the fourth clamping plate 412; the third telescopic assembly 413 and the fourth telescopic assembly 414 are respectively located on both sides of the reciprocating conveying device 2; a second sealing and inflating component 415 for connecting to an air source is connected to the third clamping plate 411 or the fourth clamping plate 412, and the second sealing and inflating component 415 is located on the first side of the reciprocating conveying device 2; the detection end of the second air pressure detection component 44 is arranged at the second sealing and inflating component 415.

[0056] like Fig. 9 and Fig.11As shown, the second clamping and inflating mechanism 41 is similar to the first clamping and inflating mechanism 31, and the third telescopic component 413 and the fourth telescopic component 414 are respectively the third telescopic cylinder and the fourth telescopic cylinder, and the third clamping plate 411 and the fourth clamping plate 412 are driven by the relative movement of the third telescopic cylinder and the fourth telescopic cylinder to achieve the clamping action of the ball valve. The difference from the first clamping and inflating mechanism 31 is that the second sealing inflatable member 415 is only arranged on the fourth clamping plate 412, and the fourth clamping plate 412 is located on the left side of the reciprocating conveying device 2, so that the second clamping and inflating mechanism 41 only inflates the first end of the ball valve. It should be noted that in order to avoid leakage during the inflation detection process, a sealing member is correspondingly arranged on the third clamping plate 411.

[0057] In this embodiment, the second rotating locking mechanism 42, the fourth lifting mechanism 43, and the second air pressure detection component 44 are also consistent with the first rotating locking mechanism 32, the third lifting mechanism 33, and the first air pressure detection component 34 in structure, respectively. The second air pressure detection component 44 is a second pressure sensor, and the second clamping block 421 of the second rotating locking mechanism 42 is also provided with a notch structure for clamping with the ball valve handle.

[0058] like Fig. 9 As shown, the third air tightness detection station 5 includes a third clamping and inflating mechanism 51 and a third air pressure detection component 52 electrically connected to the PLC controller. The third clamping and inflating mechanism 51 is used to clamp and inflate the second end of the ball valve, and is installed on the frame 9; the detection end of the third air pressure detection component 52 is arranged at the inflation end of the third clamping and inflating mechanism 51.

[0059] Specifically, the third clamping and inflating mechanism 51 is similar to the second clamping and inflating mechanism 41, and includes a fifth clamping plate 511, a sixth clamping plate 512, a fifth telescopic component 513 connected to the fifth clamping plate 511, and a sixth telescopic component 514 connected to the sixth clamping plate 512; the fifth telescopic component 513 and the sixth telescopic component 514 are respectively located on both sides of the reciprocating conveying device 2; the fifth clamping plate 511 or the sixth clamping plate 512 is connected to a third sealing and inflating member 515 for connecting to an air source, and the third sealing and inflating member 515 is located on the second side of the reciprocating conveying device 2; the detection end of the third air pressure detection member 52 is arranged at the third sealing and inflating member 515. Figure 8 and Fig. 9As shown, in this embodiment, the fifth telescopic assembly 513 and the sixth telescopic assembly 514 are respectively the fifth telescopic cylinder and the sixth telescopic cylinder, which are respectively installed on both sides of the reciprocating conveying device 2 through mounting seats; the fifth clamping plate 511 and the sixth clamping plate 512 can be driven to achieve clamping action through the expansion and contraction of the fifth and sixth telescopic cylinders. In this embodiment, the third sealing inflatable member 515 is connected to the fifth clamping plate 511, and the fifth clamping plate 511 is located on the right side of the reciprocating conveying device 2, so that the third clamping and inflating mechanism 51 only inflates the second end of the ball valve. In order to avoid leakage during the inflation detection process, a sealing member is also correspondingly provided on the sixth clamping plate 512.

[0060] In addition, the third air pressure detection member 52 in this embodiment is a third pressure sensor. In this embodiment, the third telescopic cylinder, the fourth telescopic cylinder, the fifth telescopic cylinder, the sixth telescopic cylinder, the second pressure sensor and the third pressure sensor are all electrically connected to the PLC controller.

[0061] like Fig.10 As shown, the fourth air tightness detection station 6 includes a first clamping mechanism 61 electrically connected to the PLC controller, a third rotating clamping mechanism 62, a fifth lifting mechanism 63, and a fourth air pressure detection member 64. Among them, the first clamping mechanism 61 is similar to the clamping part of the first clamping and inflating mechanism 31. The first clamping mechanism 61 includes a seventh clamping plate, an eighth clamping plate, a seventh telescopic cylinder connected to the seventh clamping plate, and an eighth telescopic cylinder connected to the eighth clamping plate; the seventh telescopic cylinder and the eighth telescopic cylinder are respectively installed on both sides of the reciprocating conveying device 2 through a mounting seat. In order to improve the accuracy of the ball valve air pressure detection, the seventh clamping plate and the eighth clamping plate are both connected with a seal. In this embodiment, the fourth air pressure detection member 64 is a fourth pressure sensor, and the detection end of the fourth pressure sensor is arranged at the seal on the seventh clamping plate or the eighth clamping plate. When the ball valve is clamped between two seals, the fourth pressure sensor can be used to detect the air pressure in the ball valve. In this embodiment, the third rotating locking mechanism 62 and the fifth lifting mechanism 63 are respectively consistent with the structures of the first rotating locking mechanism 32 and the third lifting mechanism 33. The third clamping block 621 of the third rotating locking mechanism 62 is also provided with a notch structure for clamping with the ball valve handle. The rest is not repeated here.

[0062] Example 3

[0063] This embodiment is similar to embodiment 1 or 2, except that Figure 3 , Figure 5 , Figure 6As shown in Figure 9, the reciprocating conveyor 2 in this embodiment includes a reciprocating motion mechanism 21, a second lifting mechanism 22, a positioning mechanism 23, and an anti-collision mechanism 24 electrically connected to the PLC controller; the positioning mechanism 23 is connected to the moving end of the reciprocating motion mechanism 21 through the second lifting mechanism 22, the fixed end of the reciprocating motion mechanism 21 is connected to the frame 9, and the anti-collision mechanism 24 is located at both ends of the reciprocating motion mechanism 21.

[0064] Specifically, the reciprocating mechanism 21 includes a first guide rail 211 mounted on the frame 9, a first slider 212 slidably connected to the first guide rail 211, and a material transfer cylinder 213; the second lifting mechanism 22 includes a first base plate 221 and a second lifting cylinder 222, the first base plate 221 is connected to the first slider 212, and the frame 9 and the first base plate 221 are connected through the material transfer cylinder 213. The positioning mechanism 23 includes a seat plate 231, a plurality of second clamping cylinders 232 mounted on the seat plate 231, and the clamping ends of the second clamping cylinders 232 are arranged upward; the seat plate 231 and the first base plate 221 are connected through the second lifting cylinder 222; the first base plate 221 is provided with a notch structure for facilitating the lifting of the positioning mechanism 23.

[0065] like Figure 3 , Figure 5 and Figure 6 As shown, in this embodiment, the reciprocating conveyor 2 further includes a first guide member 25, which includes a guide sleeve 251 and a guide post 252 inserted into the guide sleeve 251; the guide sleeve 251 and the guide post 252 are respectively connected to the lower surface of the first base plate 221 and the lower surface of the seat plate 231; the lifting and lowering of the second lifting cylinder 222 can drive the positioning mechanism 23 to lift relative to the first base plate 221. Figure 3 As shown, in this embodiment, the second lifting mechanism 22 includes a plurality of first substrates 221 arranged and connected, and the plurality of first substrates 221 arranged and arranged constitute a first substrate assembly. The number of positioning mechanisms 23 arranged on the first substrate assembly can be selected according to the actual use scenario and is not limited here. In this embodiment, the material transfer cylinder 213, the second lifting cylinder 222, and the second clamping claw cylinder 232 are all electrically connected to the PLC controller.

[0066] Specifically, the anti-collision mechanism 24 includes a collision block 241 and a buffer 242. The collision block 241 is installed at the two end edges of the first substrate assembly, and the buffer 242 is installed on the frame 9, and the buffer end of the buffer 242 faces the collision block 241, which can prevent the first substrate 221 from colliding with the frame 9 when performing reciprocating motion.

[0067] Example 4

[0068] This embodiment is similar to any one of Embodiments 1 to 3, except that Figure 3 and Figure 4 As shown, the material picking device 1 in this embodiment includes a first clamping cylinder 11, a first lifting mechanism 12, and a first horizontal conveying mechanism 13 electrically connected to the PLC controller; the first clamping cylinder 11 is connected to the conveying end of the first horizontal conveying mechanism 13 through the first lifting mechanism 12, and the clamping end of the first clamping cylinder 11 is set downward; the fixed end of the first horizontal conveying mechanism 13 is installed on the frame 9.

[0069] Specifically, the first horizontal conveying mechanism 13 includes a conveying cylinder and a conveying guide rail slider structure connected to the conveying cylinder. The first lifting mechanism 12 is a first lifting cylinder. The cylinder seat of the first lifting cylinder is connected to the slider portion of the conveying guide rail slider structure. The piston rod of the first lifting cylinder is connected to the cylinder seat of the first clamping cylinder 11. The clamping end of the first clamping cylinder 11 is set downward and can be used to clamp the ball valve to be tested. Figure 4 As shown, in this embodiment, the horizontal movement direction of the first horizontal conveying mechanism 13 and the horizontal movement direction of the reciprocating mechanism 21 are arranged perpendicular to each other; the first clamping claw cylinder 11 is located above the reciprocating conveying device 2.

[0070] Example 5

[0071] This embodiment is similar to any one of Embodiments 1 to 4, except that Figure 2 , Figure 7 , Fig.10 and Fig.12 As shown, the torque detection device 7 in this embodiment includes a second clamping mechanism 71 electrically connected to the PLC controller, a rotation drive mechanism 72, and a sixth lifting mechanism 73. The sixth lifting mechanism 73 is located above the second clamping mechanism 71, and the second clamping mechanism 71 is installed on the frame 9; the fixed end of the sixth lifting mechanism 73 is connected to the rotation drive mechanism 72, and a fourth clamping block 74 is connected to the lifting end of the sixth lifting mechanism 73, and the fourth clamping block 74 is transmission-connected to the rotation drive mechanism 72; the fixed end of the sixth lifting mechanism 73 is connected to the frame 9.

[0072] Specifically, the second clamping mechanism 71 includes a first clamping block 711, a second clamping block 712, a ninth telescopic assembly 713 connected to the first clamping block 711, and a tenth telescopic assembly 714 connected to the second clamping block 712. In this embodiment, the ninth telescopic assembly 713 is a ninth telescopic cylinder, and the tenth telescopic assembly 714 is a tenth telescopic cylinder. The ninth telescopic cylinder and the tenth telescopic cylinder are respectively installed on both sides of the reciprocating motion mechanism 21 through a mounting seat. In this embodiment, the sixth lifting mechanism 73 has the same structure as the third lifting mechanism 33. The rotary drive mechanism 72 includes a servo motor 721 and a reducer 722 connected to the output shaft of the servo motor 721. The reducer 722 is installed at the fixed end of the sixth lifting mechanism 73. The output end of the reducer 722 is connected to the fourth clamping block 74 through a transmission member; the fourth clamping block 74 also has a notch structure for clamping with the ball valve handle.

[0073] Example 6

[0074] This embodiment is similar to any one of Embodiments 1 to 5, except that Fig.13 and Fig.14 As shown, the quality inspection system in this embodiment further includes a distinguishing and unloading device 8 located below the frame 9. The distinguishing and unloading device 8 is located directly below the torque detection device 7, and the distinguishing and unloading device 8 is electrically connected to the PLC controller.

[0075] The material-distributing device 8 includes a first material-discharging hopper 81, a second material-discharging hopper 82, and a connecting frame 83. The first material-discharging hopper 81 is connected to the connecting frame 83. The middle of the second material-discharging hopper 82 is hinged to the connecting frame 83, and one end of the second material-discharging hopper 82 is connected to the connecting frame 83 through a seventh lifting mechanism 84. In this embodiment, the seventh lifting mechanism 84 is a seventh lifting cylinder, and the seventh lifting cylinder is electrically connected to the PLC controller.

[0076] like Fig.14 As shown, the distinguishing discharge device 8 also includes a first dividing hopper 85 connected to the upper end of the first discharge hopper 81, the first dividing hopper 85 is communicated with the first discharge hopper 81, and has the same discharge direction as the first discharge hopper 81; the distinguishing discharge device 8 also includes a second dividing hopper 86 connected to the upper end of the second discharge hopper 82, the second dividing hopper 86 is communicated with the second discharge hopper 82, and has the same discharge direction as the second discharge hopper 82; the first dividing hopper 85 and the second dividing hopper 86 are alternately arranged.

[0077] When the seventh lifting cylinder is extended, the first drop hopper 81 and the second drop hopper 82 have different drop directions. The first drop hopper 81 and the first sub-hopper 85 are both tilted downward toward the first side of the frame 9, and the second drop hopper 82 and the second sub-hopper 86 are both tilted downward toward the second side of the frame 9. This setting enables the distinguishing drop device 8 to drop qualified and unqualified ball valve products separately at the same time. When the seventh lifting cylinder retracts and drives the second drop hopper 82 to rotate, the second sub-hopper 86 abuts against the first drop hopper 81. The drop directions of the first drop hopper 81, the second drop hopper 82, the first sub-hopper 85, and the second sub-hopper 86 are all the same, and can be used to quickly drop qualified ball valve products at the same time.

[0078] Example 7

[0079] This embodiment is similar to any one of Embodiments 1 to 6, except that Figure 3 As shown, the frame 9 includes a bottom plate 91 and a frame body 92 connected to the upper surface of the bottom plate 91; the bottom plate 91 has an opening structure for installing the reciprocating conveying device 2, the first guide rail 211 is installed at the opening structure of the bottom plate 91, and the positioning mechanism 23 can extend upward through the second lifting mechanism 22 at the opening structure. The first telescopic assembly 313, the third telescopic assembly 413, the fifth telescopic assembly 513, the seventh telescopic assembly, and the ninth telescopic assembly 713 are respectively arranged and installed on the bottom plate 91 through the mounting seat, and are all located on the same side of the reciprocating motion mechanism 21; the second telescopic assembly 314, the fourth telescopic assembly 414, the sixth telescopic assembly 514, the eighth telescopic assembly, and the tenth telescopic assembly 714 are also arranged and installed on the bottom plate 91 through the mounting seat, and are all located on the other side of the reciprocating motion mechanism 21. The fixed ends of the first horizontal conveying mechanism 13, the third lifting mechanism 33, the fourth lifting mechanism 43, the fifth lifting mechanism 63, and the sixth lifting mechanism 73 are all installed on the frame body 92.

[0080] Example 8

[0081] like Fig.15 The embodiment of the detection method of a quality detection system of the present invention is shown, wherein the quality detection system includes a material taking device 1, a reciprocating conveying device 2, an airtightness detection device, and a torque detection device 7, and the structure of the quality detection system is as described in Example 6. Specifically, the structure of the material taking device 1 is as described in Example 4, the structure of the reciprocating conveying device 2 is as described in Example 3, the structure of the airtightness detection device is as described in Example 2, and the structure of the torque detection device 7 is as described in Example 5; the testing method includes the following steps:

[0082] S1. The PLC controller controls the material taking device 1 to take the ball valves to be tested in sequence and place them at the reciprocating conveyor 2; specifically, step S1 specifically includes the following steps:

[0083] S11. The PLC controller controls the first horizontal conveying mechanism 13 and the first lifting mechanism 12 to move to the placement area of ​​the ball valve to be tested, and then controls the first clamping claw cylinder 11 to clamp the ball valve to be tested;

[0084] S12. The PLC controller controls the first horizontal conveying mechanism 13 and the first lifting mechanism 12 to move in coordination, driving the first clamping cylinder 11 and the ball valve to be tested to move to the top of the positioning mechanism 23;

[0085] S13. The PLC controller controls the second lifting mechanism 22 to rise, and controls the second clamping jaw cylinder 232 to open, so as to receive the ball valve to be tested;

[0086] S14. The PLC controller controls the first clamping cylinder 11 to loosen, so that the ball valve to be inspected is clamped by the second clamping cylinder 232.

[0087] S2. The PLC controller controls the reciprocating conveyor 2 to convey the ball valve to the first air tightness detection station 3; the first air tightness detection station 3 clamps the two ends of the ball valve, then turns the ball valve handle to put the ball valve in a conducting state, and seals and inflates the two ends of the ball valve at the same time; during the sealing and inflation process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the PLC controller marks the current ball valve as "the ball valve handle is qualified", otherwise the PLC controller marks the current ball valve as "the ball valve handle is unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2; specifically, step S2 specifically includes the following steps:

[0088] S21. The second lifting mechanism 22 maintains the current height position, and the PLC controller controls the material transfer cylinder 213 to make the positioning mechanism 23 drive the ball valve to be tested to move to the first air tightness testing station 3;

[0089] S22. The PLC controller controls the first telescopic assembly 313 and the second telescopic assembly 314 to extend, so that the first sealing inflatable member 315 on the first clamping plate 311 and the second clamping plate 312 abut against and clamp the two ends of the ball valve to be tested; then the second clamping jaw cylinder 232 is released, and the second lifting mechanism 22 is lowered, so as to facilitate the transportation of the next ball valve to be tested;

[0090] S23. The PLC controller controls the third lifting mechanism 33 to drive the first clamping block 321 to descend, so that the notch structure of the first clamping block 321 fits with the ball valve handle; then controls the first rotary cylinder 322 to rotate, so that the first clamping block 321 drives the ball valve handle to rotate, so that the ball valve is in a conducting state; then the first rotating clamping mechanism 32 returns to its initial position;

[0091] S24. The two ends of the ball valve are sealed and inflated by the first sealing and inflating member 315, and the first air pressure detection member 34 detects the air pressure at the ball valve in real time and transmits the air pressure signal to the PLC controller;

[0092] S25. The PLC controller receives the air pressure signal and performs signal processing: if the air pressure value can remain stable within a certain range, the PLC controller marks the current ball valve as "the ball valve handle is qualified", otherwise the PLC controller marks the current ball valve as "the ball valve handle is unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2; it should be noted that since each ball valve has a corresponding unique number, the PLC controller can mark it according to the number of the ball valve.

[0093] S3. The PLC controller controls the reciprocating conveyor 2 to convey the ball valve marked as "ball valve handle qualified" to the second air tightness detection station 4; the second air tightness detection station 4 clamps the two ends of the ball valve, then turns the ball valve handle to close the ball valve, and simultaneously seals and inflates one end of the ball valve; during the sealing and inflation process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the PLC controller marks the current ball valve as "ball valve end A qualified", otherwise the PLC controller marks the current ball valve as "ball valve end A unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2; specifically, step S3 specifically includes the following steps:

[0094] S31. The PLC controller controls the second lifting mechanism 22 and the positioning mechanism 23 through the reciprocating mechanism 21 to clamp and transport the ball valve marked as "ball valve handle qualified", so that the ball valve with "ball valve handle qualified" is moved to the second air tightness testing station 4;

[0095] S32. The PLC controller controls the third telescopic assembly 413 and the fourth telescopic assembly 414 to extend, so that the sealing member on the third clamping plate 411 and the second sealing inflatable member 415 on the fourth clamping plate 412 are respectively abutted against and clamped on both ends of the "ball valve handle qualified" ball valve; then the second clamping jaw cylinder 232 is released, and the second lifting mechanism 22 is lowered, so as to facilitate the transportation of the next ball valve to be tested;

[0096] S33. The PLC controller controls the fourth lifting mechanism 43 to drive the second clamping block 421 to descend, so that the notch structure of the second clamping block 421 fits with the ball valve handle; the first clamping block 321 is driven to rotate by the second rotating clamping mechanism 42, and the ball valve handle is also rotated accordingly, so that the ball valve is in a closed state; then the second rotating clamping mechanism 42 returns to its initial position;

[0097] S34. The A end of the ball valve is sealed and inflated by the second sealing and inflating member 415, and the second air pressure detection member 44 detects the air pressure at the ball valve in real time and transmits the air pressure signal to the PLC controller; it should be noted that the A end of the ball valve may refer to the left end of the ball valve;

[0098] S35. The PLC controller receives the air pressure signal and processes the signal: if the air pressure value can remain stable within a certain range, the PLC controller marks the current ball valve as "ball valve end A qualified", otherwise the PLC controller marks the current ball valve as "ball valve end A unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2.

[0099] S4. The PLC controller controls the reciprocating conveyor 2 to convey the ball valve marked as "ball valve end A qualified" to the third air tightness detection station 5; the third air tightness detection station 5 clamps the two ends of the ball valve and seals and inflates the other end of the ball valve at the same time; during the sealing and inflation process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the PLC controller marks the current ball valve as "ball valve end B qualified", otherwise the PLC controller marks the current ball valve as "ball valve end B unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2; specifically, step S4 includes the following steps:

[0100] S41. The PLC controller controls the second lifting mechanism 22 and the positioning mechanism 23 through the reciprocating mechanism 21 to clamp and transport the ball valve marked as "ball valve A end is qualified", so that the ball valve marked as "ball valve A end is qualified" is moved to the third air tightness testing station 5;

[0101] S42. The PLC controller controls the fifth telescopic assembly 513 and the sixth telescopic assembly 514 to extend, so that the third sealing inflatable member 515 on the fifth clamping plate 511 and the sealing member on the sixth clamping plate 512 are respectively abutted against and clamped on both ends of the "ball valve A end is qualified" ball valve; then the second clamping claw cylinder 232 is released, and the second lifting mechanism 22 is lowered, so as to facilitate the transportation of the next ball valve to be tested;

[0102] S43. The ball valve handle maintains the current position, so that the ball valve is still in a closed state; then the B end of the ball valve is sealed and inflated through the third sealing and inflating member 515, and the third air pressure detection member 52 detects the air pressure at the ball valve in real time and transmits the air pressure signal to the PLC controller; it should be noted that the B end of the ball valve may refer to the right end of the ball valve;

[0103] S44. The PLC controller receives the air pressure signal and processes the signal: if the air pressure value can remain stable within a certain range, the PLC controller marks the current ball valve as "ball valve B end qualified", otherwise the PLC controller marks the current ball valve as "ball valve B end unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2.

[0104] S5. The PLC controller controls the reciprocating conveyor 2 to convey the ball valve marked as "ball valve B end qualified" to the fourth air tightness detection station 6; the fourth air tightness detection station 6 clamps the two ends of the ball valve, then turns the ball valve handle to put the ball valve in a conducting state again, and detects the gas output at the ball valve in real time. If the gas output of the ball valve reaches the standard value related to its specification, the PLC controller marks the current ball valve as "ball valve core qualified", otherwise the PLC controller marks the current ball valve as "ball valve core unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2; specifically, step S5 specifically includes the following steps:

[0105] S51. The PLC controller controls the second lifting mechanism 22 and the positioning mechanism 23 through the reciprocating mechanism 21 to clamp and transport the ball valve marked as "ball valve B end qualified", so that the ball valve marked as "ball valve B end qualified" is moved to the fourth air tightness testing station 6;

[0106] S52. The PLC controller controls the seventh telescopic assembly and the eighth telescopic assembly to extend, so that the seals on the seventh clamping plate and the eighth clamping plate are respectively abutted against and clamped on both ends of the "ball valve B end is qualified" ball valve; then the second clamping jaw cylinder 232 is released, and the second lifting mechanism 22 is lowered, so as to facilitate the transportation of the next ball valve to be tested;

[0107] S53. The PLC controller controls the fifth lifting mechanism 63 to drive the third clamping block 621 downward, so that the notch structure of the third clamping block 621 fits with the ball valve handle; the third clamping block 621 is driven to rotate by the third rotation clamping mechanism 62, and the ball valve handle is also rotated accordingly, so that the ball valve is in the conducting state again; then the fifth lifting mechanism 63 returns to the initial position;

[0108] S54. The fourth air pressure detection member 64 detects the air volume at the ball valve in real time and transmits the air pressure signal to the PLC controller;

[0109] S55. The PLC controller receives the air pressure signal and processes the signal: if the air outlet of the ball valve reaches the standard value related to its specifications, the PLC controller will mark the current ball valve as "the ball valve core is qualified", otherwise the PLC controller will mark the current ball valve as "the ball valve core is unqualified" and transport it to the unqualified product area through the reciprocating conveyor 2.

[0110] S6. The PLC controller controls the reciprocating conveyor 2 to convey the ball valve marked as "ball valve core qualified" to the torque detection device 7; the torque detection device 7 clamps the two ends of the ball valve, and twists the ball valve handle with the corresponding torque set according to the ball valve specification. If the ball valve handle can be twisted under the corresponding torque, the PLC controller marks the current ball valve as "ball valve handle torque qualified", otherwise the PLC controller marks the current ball valve as "ball valve handle torque unqualified" and transports it to the unqualified product area through the reciprocating conveyor 2; specifically, step S6 includes the following steps:

[0111] S61. The PLC controller controls the second lifting mechanism 22 and the positioning mechanism 23 through the reciprocating mechanism 21 to clamp and transport the ball valve marked as "ball valve core qualified", so that the ball valve with "ball valve core qualified" is moved to the torque detection device 7;

[0112] S62. The PLC controller controls the ninth telescopic assembly 713 and the tenth telescopic assembly 714 to extend, so that the first clamping block 711 and the second clamping block 712 respectively abut against and clamp the two ends of the "ball valve core qualified" ball valve; then the second clamping claw cylinder 232 is released, and the second lifting mechanism 22 is lowered, so as to facilitate the transportation of the next ball valve to be tested;

[0113] S63. The PLC controller controls the sixth lifting mechanism 73 to drive the fourth clamping block 74 downward, so that the notch structure of the fourth clamping block 74 fits with the ball valve handle; the fourth clamping block 74 is driven to rotate by the rotary drive mechanism 72:

[0114] If the ball valve handle can be twisted under the rotation drive of the rotary drive mechanism 72, the PLC controller will mark the current ball valve as "ball valve handle torque qualified";

[0115] If the ball valve handle cannot be twisted under the rotation drive of the rotary drive mechanism 72, the PLC controller will mark the current ball valve as "ball valve handle torque unqualified" and transport it to the unqualified product area through the reciprocating conveyor 2.

[0116] In step S63, it should be noted that the servo motor 721 has a torque mode, and its upper torque limit can be set by the PLC controller. The torque value can be set according to the specifications of the corresponding ball valve. The torque detection device 7 can be used to detect whether the torque of the ball valve handle is too tight.

[0117] S7. The PLC controller controls the reciprocating conveyor 2 to convey the ball valve marked as "ball valve handle torque qualified" to the qualified product area.

[0118] It should be noted that the reciprocating conveying device 2 has multiple conveying stations. In this embodiment, the reciprocating conveying device 2 has five conveying stations, that is, five sets of positioning mechanisms 23. The direction from the material picking device 1 to the material picking device 7 is used as the forward direction of the reciprocating motion of the reciprocating mechanism 21; in step S21, the ball valve to be tested is placed at the first conveying station, and the reciprocating mechanism 21 moves forward to drive the ball valve to be tested to the first air tightness testing station 3. In step S22, when the current ball valve to be tested has been clamped by the first clamping and inflating mechanism 31, the reciprocating mechanism 21 can move backward, so that the first conveying station can receive the next ball valve to be tested transmitted from the material picking device 1. The current ball valve that has completed the inspection at the first airtightness inspection station 3 falls into the second transfer station, and then moves forward again through the reciprocating motion mechanism 21 to be transferred to the second airtightness inspection station 4; at the same time, the next ball valve located at the first transfer station can be simultaneously transported to the first airtightness inspection station 3 for inspection. This reciprocating motion method can further improve the efficiency of the inspection work.

[0119] Example 9

[0120] This embodiment is similar to the embodiment 8, except that the quality inspection system includes a material taking device 1, a reciprocating conveying device 2, an air tightness inspection device, a torque inspection device 7, and a distinguishing material discharge device 8, and the structure of the quality inspection system is as described in the embodiment 6. In this embodiment, the first material discharge hopper 81 is used to discharge qualified ball valves, and the second material discharge hopper 82 is used to discharge unqualified ball valves. Specifically:

[0121] In step S25, for the ball valve with the mark of "unqualified ball valve handle", it is conveyed to the torque detection device 7 through the reciprocating conveying device 2; the PLC controller controls the seventh lifting mechanism 84 to rise, so that the second drop hopper 82 is connected to the unqualified product area; then the ninth telescopic assembly 713 and the tenth telescopic assembly 714 are controlled to extend, so that the first clamp block 711 and the second clamp block 712 clamp the "unqualified ball valve handle" ball valve; then the reciprocating motion mechanism 21 drives the second lifting mechanism 22 and the positioning mechanism 23 to avoid, and the ninth telescopic assembly 713 and the tenth telescopic assembly 714 retract so that the first clamp block 711 and the second clamp block 712 no longer clamp the ball valve with the mark of "unqualified ball valve handle", and the ball valve passes through the second distribution hopper 86 and the second drop hopper 82 in turn and falls to the unqualified product area.

[0122] In steps S35, S44, and S55, for ball valves marked with "ball valve A end is unqualified", "ball valve B end is unqualified" or "ball valve core is unqualified", the torque detection device 7 and the reciprocating conveying device 2 are also used to transport the ball valves, so that the ball valves pass through the second distribution hopper 86 and the second drop hopper 82 in turn and fall into the unqualified product area.

[0123] In step S7, for the ball valve marked as "ball valve handle torque qualified", the PLC controller controls the seventh lifting mechanism 84 to descend, so that the second distribution hopper 86 is connected to the first drop hopper 81, and the first drop hopper 81 remains connected to the qualified product area; then controls the ninth telescopic assembly 713 and the tenth telescopic assembly 714 to retract so that the first clamp block 711 and the second clamp block 712 no longer clamp the ball valve marked with "ball valve handle torque qualified", and the ball valve passes through the first distribution hopper 85 or the second distribution hopper 86 in turn and falls into the first drop hopper 81, and finally falls into the qualified product area.

[0124] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A quality inspection system, characterized in that: The invention comprises a reciprocating conveying device (2), wherein a material taking device (1) and a torque detection device (7) are respectively provided at both ends of the reciprocating conveying device (2); an air tightness detection device is also provided on the reciprocating conveying device (2); wherein the air tightness detection device comprises a first air tightness detection station (3) for detecting whether a ball valve handle is leaking, a second air tightness detection station (4) for detecting whether one side of the ball valve is leaking, a third air tightness detection station (5) for detecting whether the other side of the ball valve is leaking, and a fourth air tightness detection station (6) for detecting whether a ball valve core is leaking. The quality inspection system further comprises a control device and a frame (9); the material taking device (1), the reciprocating conveying device (2), the air tightness detection device, and the torque detection device (7) are all connected to the control device for communication, and the material taking device (1), the reciprocating conveying device (2), the air tightness detection device, and the torque detection device (7) are all overlapped through the frame (9); The first air tightness detection station (3) comprises a first clamping and inflating mechanism (31), a first rotating and locking mechanism (32), a third lifting mechanism (33), and a first air pressure detection member (34) which are communicatively connected to the control device; the first clamping and inflating mechanism (31) is used to clamp and inflate the ball valve, and is installed on the frame (9); the first rotating and locking mechanism (32) is used to rotate the ball valve handle, and is connected to the frame (9) via the third lifting mechanism (33); the detection end of the first air pressure detection member (34) is arranged at the inflation end of the first clamping and inflating mechanism (31); The first clamping and inflating mechanism (31) comprises a first clamping plate (311), a second clamping plate (312), a first telescopic component (313) connected to the first clamping plate (311), and a second telescopic component (314) connected to the second clamping plate (312); the first telescopic component (313) and the second telescopic component (314) are respectively located on two sides of the reciprocating conveying device (2); the first clamping plate (311) and the second clamping plate (312) are both connected to a first sealing and inflating member (315), and the first sealing and inflating member (315) is used to be connected to an air source; The first rotating clamping mechanism (32) comprises a first clamping block (321) and a first rotating cylinder (322) respectively connected to the lifting end and the fixed end of the third lifting mechanism (33); the first clamping block (321) is drivingly connected to the first rotating cylinder (322); the first clamping block (321) is located above the first clamping and inflating mechanism (31); The detection end of the first air pressure detection component (34) is arranged at the first sealing and inflating component (315); The first telescopic assembly (313), the second telescopic assembly (314), and the first rotary cylinder (322) are all in communication connection with the control device; The second air tightness detection station (4) comprises a second clamping and inflating mechanism (41) which is communicatively connected to the control device, a second rotation and locking mechanism (42), a fourth lifting mechanism (43), and a second air pressure detection component (44); wherein: The second clamping and inflating mechanism (41) comprises a third clamping plate (411), a fourth clamping plate (412), a third telescopic assembly (413) connected to the third clamping plate (411), and a fourth telescopic assembly (414) connected to the fourth clamping plate (412); the third telescopic assembly (413) and the fourth telescopic assembly (414) are respectively located on both sides of the reciprocating conveying device (2); a second sealing and inflating member (415) for connecting to an air source is connected to the third clamping plate (411) or the fourth clamping plate (412), and the second sealing and inflating member (415) is located on the first side of the reciprocating conveying device (2); the detection end of the second air pressure detection member (44) is arranged at the second sealing and inflating member (415); The third air tightness detection station (5) comprises a third clamping and inflating mechanism (51) and a third air pressure detection component (52) which are communicatively connected to the control device; wherein: The third clamping and inflating mechanism (51) comprises a fifth clamping plate (511), a sixth clamping plate (512), a fifth telescopic assembly (513) connected to the fifth clamping plate (511), and a sixth telescopic assembly (514) connected to the sixth clamping plate (512); the fifth telescopic assembly (513) and the sixth telescopic assembly (514) are respectively located on both sides of the reciprocating conveying device (2); a third sealing and inflating member (515) for connecting to an air source is connected to the fifth clamping plate (511) or the sixth clamping plate (512), and the third sealing and inflating member (515) is located on the second side of the reciprocating conveying device (2); the detection end of the third air pressure detection member (52) is arranged at the third sealing and inflating member (515); The third telescopic assembly (413), the fourth telescopic assembly (414), the fifth telescopic assembly (513), and the sixth telescopic assembly (514) are all in communication connection with the control device.

2. The quality inspection system according to claim 1, characterized in that: The reciprocating conveying device (2) comprises a reciprocating mechanism (21), a second lifting mechanism (22), a positioning mechanism (23), and an anti-collision mechanism (24) which are communicatively connected to a control device; the positioning mechanism (23) is connected to the moving end of the reciprocating mechanism (21) through the second lifting mechanism (22), the fixed end of the reciprocating mechanism (21) is connected to a frame (9), and the anti-collision mechanism (24) is located at both ends of the reciprocating mechanism (21).

3. The quality inspection system according to claim 2, characterized in that: The reciprocating mechanism (21) comprises a first guide rail (211) mounted on the frame (9), a first slider (212) slidably connected to the first guide rail (211), and a material transfer cylinder (213); The second lifting mechanism (22) comprises a first base plate (221) and a second lifting cylinder (222); the first base plate (221) is connected to the first slider (212); and the frame (9) and the first base plate (221) are connected via a material transfer cylinder (213); The positioning mechanism (23) comprises a base plate (231), and a plurality of second clamping claw cylinders (232) mounted on the base plate (231), wherein the clamping claw ends of the second clamping claw cylinders (232) are arranged upward; the base plate (231) and the first base plate (221) are connected via the second lifting cylinders (222); The anti-collision mechanism (24) comprises a collision block (241) and a buffer (242); the collision block (241) is mounted on both ends of the first substrate (221); the buffer (242) is mounted on the frame (9), and the buffer end of the buffer (242) faces the collision block (241); The material transfer cylinder (213), the second lifting cylinder (222), and the second clamping cylinder (232) are all connected to the control device for communication.

4. The quality inspection system according to claim 2 or 3, characterized in that: The material taking device (1) comprises a first clamping cylinder (11), a first lifting mechanism (12), and a first horizontal conveying mechanism (13) which are communicatively connected to a control device; the first clamping cylinder (11) is connected to a conveying end of the first horizontal conveying mechanism (13) via the first lifting mechanism (12), and the clamping end of the first clamping cylinder (11) is arranged downward; the fixed end of the first horizontal conveying mechanism (13) is mounted on the frame (9).

5. The quality inspection system according to claim 1, characterized in that: The torque detection device (7) comprises a second clamping mechanism (71) which is communicatively connected to the control device, a rotating drive mechanism (72), and a sixth lifting mechanism (73); the sixth lifting mechanism (73) is located above the second clamping mechanism (71); the second clamping mechanism (71) is mounted on the frame (9); the fixed end of the sixth lifting mechanism (73) is connected to the rotating drive mechanism (72); a fourth clamping block (74) is connected to the lifting end of the sixth lifting mechanism (73); the fourth clamping block (74) is transmission-connected to the rotating drive mechanism (72); the fixed end of the sixth lifting mechanism (73) is connected to the frame (9).

6. The quality inspection system according to claim 1, characterized in that: It also includes a material differentiation and unloading device (8) located below the frame (9), and the material differentiation and unloading device (8) is communicatively connected to the control device; wherein: The differentiated unloading device (8) comprises a first unloading hopper (81), a second unloading hopper (82), and a connecting frame (83); the first unloading hopper (81) is connected to the connecting frame (83), the middle part of the second unloading hopper (82) is hinged to the connecting frame (83), and one end of the second unloading hopper (82) is connected to the connecting frame (83) via a seventh lifting mechanism (84); the seventh lifting mechanism (84) is communicatively connected to the control device.

7. A detection method applied to the quality detection system according to any one of claims 1 to 6, characterized in that: The steps include: S1. The control device controls the material taking device (1) to take the ball valve to be tested in turn and place it at the reciprocating conveying device (2); S2. The control device controls the reciprocating conveying device (2) to convey the ball valve to the first air tightness testing station (3); the first air tightness testing station (3) clamps the two ends of the ball valve, then turns the ball valve handle to put the ball valve in a conducting state, and simultaneously seals and inflates the two ends of the ball valve; during the sealing and inflating process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the control device marks the current ball valve as "ball valve handle qualified", otherwise the control device marks the current ball valve as "ball valve handle unqualified" and transports it to the unqualified product area through the reciprocating conveying device (2); S3. The control device controls the reciprocating conveying device (2) to convey the ball valve marked as "ball valve handle qualified" to the second air tightness testing station (4); the second air tightness testing station (4) clamps the two ends of the ball valve, then turns the ball valve handle to close the ball valve, and simultaneously seals and inflates one end of the ball valve; during the sealing and inflation process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the control device marks the current ball valve as "ball valve end A qualified", otherwise the control device marks the current ball valve as "ball valve end A unqualified" and transports it to the unqualified product area through the reciprocating conveying device (2); S4. The control device controls the reciprocating conveying device (2) to convey the ball valve marked as "ball valve end A qualified" to the third air tightness testing station (5); the third air tightness testing station (5) clamps the two ends of the ball valve and seals and inflates the other end of the ball valve at the same time; during the sealing and inflating process, the air pressure at the ball valve is detected in real time. If the air pressure value can remain stable within a certain range, the control device marks the current ball valve as "ball valve end B qualified", otherwise the control device marks the current ball valve as "ball valve end B unqualified" and transports it to the unqualified product area through the reciprocating conveying device (2); S5. The control device controls the reciprocating conveying device (2) to convey the ball valve marked as "ball valve B end qualified" to the fourth air tightness testing station (6); the fourth air tightness testing station (6) clamps the two ends of the ball valve, then turns the ball valve handle to put the ball valve in a conducting state again, and detects the air pressure at the ball valve in real time. If the air volume of the ball valve reaches the standard value related to its specifications, the control device marks the current ball valve as "ball valve core qualified", otherwise the control device marks the current ball valve as "ball valve core unqualified" and transports it to the unqualified product area through the reciprocating conveying device (2); S6. The control device controls the reciprocating conveying device (2) to convey the ball valve marked as "ball valve core qualified" to the torque detection device (7); the torque detection device (7) clamps the two ends of the ball valve and twists the ball valve handle with the corresponding torque set according to the ball valve specification. If the ball valve handle can be twisted under the corresponding torque, the control device marks the current ball valve as "ball valve handle torque qualified", otherwise the control device marks the current ball valve as "ball valve handle torque unqualified" and transports it to the unqualified product area through the reciprocating conveying device (2); S7. The control device controls the reciprocating conveying device (2) to convey the ball valve marked as "ball valve handle torque qualified" to the qualified product area.

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