Safety valve assembly machine

Abstract

The present invention discloses a safety valve assembly machine, which includes an internal leakage assembly unit, an external leakage component assembly unit, an external leakage assembly unit, a valve body transfer and connection device, and an external leakage component transfer and connection device; the internal leakage assembly unit installs a filter screen into the internal leakage installation channel of the valve body pre-installed with an internal leakage component, and then flips and transfers the valve body to the safety valve assembly unit through the valve body transfer and connection device. The external leakage component assembly unit is used to assemble the external leakage component, and then flips and transfers the external leakage component to the safety valve assembly unit through the external leakage component transfer and connection device; the safety valve assembly unit sequentially installs the received external leakage component, spring, and compression cap into the external leakage installation channel of the received valve body. The present invention realizes a coherent set of assembly processes for the three steps of internal leakage assembly, external leakage component assembly, and external leakage assembly through the connection method, avoiding manual intervention in the middle of these three assembly links, which helps to improve work efficiency and reduce labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic assembly, and particularly relates to a safety valve assembly machine. Background Art

[0002] A safety valve is a relatively special valve. Its particularity lies in that, different from other valves which only play the role of opening and closing, it more importantly plays the role of protecting the safety of equipment. The internal structure of the safety valve is precise and complex, and the installation process is also relatively cumbersome. Generally, it is necessary to first install the sealing ring, internal leakage component and external leakage component separately, and then install the internal leakage component, external leakage component and other parts into the valve body. After manual water inspection and pressure adjustment, the handle needs to be installed. Such a cumbersome installation step brings great difficulties to the automatic assembly of the safety valve.

[0003] Currently, in the field of automatic assembly of safety valves, generally only the automatic assembly of some components can be achieved, and then manual assembly is required. The degree of automation is not high, and it is difficult to achieve a continuous assembly process, resulting in a relatively high manual participation in the intermediate links of the assembly process, affecting the assembly efficiency and wasting labor costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a safety valve assembly machine that integrates multiple assembly units and realizes continuous multi-component assembly through online connection, so as to improve the assembly efficiency and save labor costs.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A safety valve assembly machine, wherein the safety valve includes a valve body having an internal leakage installation channel and an external leakage installation channel. An internal leakage component and a filter are sequentially installed in the internal leakage installation channel, and an external leakage component, a spring and a compression cap are sequentially installed in the external leakage installation channel;

[0007] The safety valve assembly machine includes an internal leakage assembly unit, an external leakage component assembly unit, an external leakage assembly unit, a valve body transfer and online connection device, and an external leakage component transfer and online connection device;

[0008] The internal leakage assembly unit installs the filter in the internal leakage installation channel of the valve body pre-installed with the internal leakage component, and then flips and transfers the valve body to the safety valve assembly unit through the valve body transfer and online connection device, and makes the external leakage installation channel vertical;

[0009] The external leakage component assembly unit is used to assemble the external leakage component, and then flips and transfers the external leakage component to the safety valve assembly unit through the external leakage component transfer and online connection device;

[0010] The safety valve assembly unit sequentially installs the received external leakage component, spring and compression cap into the external leakage installation channel of the received valve body.

[0011] Preferably, the internal leakage assembly unit includes an internal leakage assembly turntable provided with a plurality of valve body vertical placement seats, and a valve body loading station, a valve body detection station, a filter screen installation station, a filter screen tightening and detection station, a non-conforming valve body removal station, and a valve body transfer station distributed along the circumferential outer side of the internal leakage assembly turntable. The internal leakage assembly turntable rotates intermittently so that the valve body vertical placement seats correspond to the stations in sequence;

[0012] When the valve body is placed on the valve body vertical placement seat, the internal leakage channel is vertical, and the external leakage channel points to the center of the internal leakage assembly turntable.

[0013] Preferably, the valve body loading station is provided with a die plate and a valve body loading manipulator capable of grasping the valve body on the die plate and placing it on the valve body vertical placement seat, and the die plate can move in a direction perpendicular to the horizontal linear movement direction of the valve body loading manipulator.

[0014] Preferably, the valve body transfer online device includes:

[0015] A valve body 90° flipping mechanism for taking out the valve body assembled by the internal leakage assembly unit and flipping it 90°; and

[0016] A valve body transfer mechanism for receiving the valve body after being flipped by the valve body 90° flipping mechanism and linearly transferring it to the external leakage assembly unit, and horizontally rotating the valve body 180° so that the external leakage installation channel remains vertical.

[0017] Preferably, the valve body 90° flipping mechanism includes a slider capable of horizontal sliding and a rotating shaft rotatably penetrating through the slider; one end of the rotating shaft is fixedly connected with a crank, and the free end of the crank is located in an L-shaped guiding groove so that the rotating shaft can rotate 90° when the slider slides; the other end of the rotating shaft is fixedly connected with a valve body flipping clamping cylinder for clamping the valve body.

[0018] The valve body transfer mechanism includes an electric push rod arranged between the internal leakage assembly unit and the external leakage assembly unit. The output end of the electric push rod is provided with a horizontal rotating cylinder, and the output end of the horizontal rotating cylinder is provided with a valve body transfer clamping cylinder; after the valve body transfer clamping cylinder receives the valve body from the valve body flipping clamping cylinder, it linearly moves and horizontally rotates 180° to transfer the valve body to the external leakage assembly unit.

[0019] Preferably, the external leakage component includes a rubber seat, and a pull rod, a stainless steel sheet, and a silica gel gasket sequentially installed on the rubber seat;

[0020] The external leakage component assembly unit includes an external leakage assembly turntable provided with a plurality of rubber seat placement grooves, and a rubber seat feeding station, a pull rod installation station, a stainless steel sheet installation station, a stainless steel sheet detection station, a silica gel gasket installation station, a silica gel gasket pressing station, a silica gel gasket detection and external leakage component transfer station distributed along the circumferential outer side of the external leakage assembly turntable. The external leakage assembly turntable rotates intermittently so that the rubber seat placement grooves correspond to the stations in sequence.

[0021] Preferably, the external leakage component transfer and connection device includes:

[0022] An external leakage component flipping mechanism for taking out the external leakage component assembled by the external leakage component assembly unit and flipping it 180°; and

[0023] An external leakage component transfer mechanism for receiving the external leakage component after being flipped by the external leakage component flipping mechanism and linearly transferring it to the external leakage assembly unit.

[0024] Preferably, the external leakage component flipping mechanism includes a vertical rotation cylinder capable of moving up and down, and an external leakage component flipping and clamping cylinder is provided at the output end of the vertical rotation cylinder;

[0025] The external leakage component transfer mechanism includes a belt-type linear moving device installed between the external leakage component assembly unit and the external leakage assembly unit, and an external leakage component transfer and clamping cylinder capable of moving up and down is provided at the output end of the belt-type linear moving device; after the external leakage component transfer and clamping cylinder receives the external leakage component of the external leakage component flipping and clamping cylinder, it linearly moves to transfer the external leakage component to the external leakage assembly unit.

[0026] Preferably, the external leakage assembly unit includes an external leakage assembly turntable provided with a plurality of valve body horizontal placement seats, and a valve body receiving station, a valve body positioning station, an external leakage component receiving and installation station, a spring installation station, a compression cap installation station, a compression cap tightening and detection station, and a discharging station distributed along the circumferential outer side of the external leakage assembly turntable. The external leakage assembly turntable rotates intermittently so that the valve body horizontal placement seats correspond to the stations in sequence.

[0027] Preferably, a conveyor belt is provided outside the discharging station, and the product discharged from the discharging station falls to the end of the conveyor belt; for any product discharged, the conveying direction of the product after falling onto the conveyor belt corresponds to the detection result of the compression cap tightening and detection station for the product: when the detection result is qualified, the product is conveyed along the conveyor belt; when the detection result is unqualified, the conveyor belt conveys in the reverse direction to make the product fall out of the conveyor belt.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. The present invention realizes a coherent set of assembly processes for internal leakage assembly, external leakage component assembly, and external leakage assembly through an online connection method, avoiding manual intervention in these three assembly links, which helps improve work efficiency and reduce labor costs.

[0030] 2. Through the flipping and linear transfer of the online device of the present invention, it can ensure that the components maintain the correct pose after online transfer, facilitating the correct progress of subsequent assembly.

[0031] 3. As a preferred embodiment of the present invention, detection devices are provided at all links where assembly errors may occur, and products with assembly errors can be removed without stopping the machine, ensuring the product yield rate while maintaining the continuity of the assembly work.

[0032] 4. As a preferred embodiment of the present invention, by corresponding the running direction of the conveyor belt with the detection results of the detection mechanism during final discharging, defective products can be automatically removed and qualified products can be collected, further improving the automation level of the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is an exploded view of the safety valve in the present invention.

[0034] Figure 2 is a schematic diagram of the completed assembly of the safety valve in the present invention.

[0035] Figure 3 is an exploded view of the external leakage component in the present invention.

[0036] Figure 4 is a schematic diagram of the overall structure of the present invention.

[0037] Figure 5 is a schematic diagram of the structure of the internal leakage assembly unit in the present invention.

[0038] Figure 6 is a schematic diagram of some workstations of the internal leakage assembly unit in the present invention.

[0039] Figure 7 is a schematic diagram of the tightening rod in the internal leakage assembly unit of the present invention.

[0040] Figure 8 is a schematic diagram of the structure of the valve body transfer online device in the present invention.

[0041] Figure 9 is a schematic diagram of the structure of the 90° flipping mechanism of the valve body in the present invention.

[0042] Figure 10 is a schematic diagram of the structure of the valve body transfer mechanism in the present invention.

[0043] Figure 11It is another schematic diagram of the working state of the valve body transfer and on-line device in the present invention.

[0044] Figure 12 It is a schematic structural diagram of the external leakage component assembly unit in the present invention.

[0045] Figure 13 It is a schematic diagram of some working stations of the external leakage assembly unit in the present invention (one).

[0046] Figure 14 It is a schematic diagram of some working stations of the external leakage assembly unit in the present invention (two).

[0047] Figure 15 It is a schematic structural diagram of the external leakage component transfer and on-line device in the present invention.

[0048] Figure 16 It is a schematic structural diagram of the external leakage assembly unit in the present invention.

[0049] Figure 17 It is a schematic diagram of some working stations of the external leakage assembly unit in the present invention (one).

[0050] Figure 18 It is a schematic diagram of some working stations of the external leakage assembly unit in the present invention (two).

[0051] In the figure: 1. Safety valve, 101. Valve body, 102. Internal leakage installation channel, 103. External leakage installation channel, 104. Internal leakage component, 105. Filter screen, 106. External leakage component, 107. Spring, 108. Compression cap, 109. Rubber seat, 110. Pull rod, 111. Stainless steel sheet, 112. Silicone gasket;

[0052] 2. Internal leakage assembly unit, 21. Internal leakage assembly turntable, 211. Valve body vertical placement seat, 22. Valve body loading station, 221. Valve body loading manipulator, 222. Die plate, 23. Valve body detection station, 24. Filter screen installation station, 241. Filter screen installation manipulator, 25. Filter screen tightening and detection station, 251. Tightening rod, 26. Unqualified valve body removal station, 261. Workpiece removal manipulator, 27. Valve body transfer station, 271. Valve body discharging manipulator;

[0053] 3. External leakage component assembly unit, 31. External leakage assembly turntable, 311. Rubber seat placement groove, 32. Rubber seat loading station, 321. Rubber seat loading manipulator, 33. Pull rod installation station, 331. Pull rod installation manipulator, 34. Stainless steel sheet installation station, 341. Stainless steel sheet installation manipulator, 342. Suction pipe, 35. Stainless steel sheet detection station, 351. Probe, 36. Silicone gasket installation station, 361. Silicone gasket installation manipulator, 37. Silicone gasket pressing station, 371. Pressing head, 38. Silicone gasket detection and external leakage component transfer station;

[0054] 4. Leakage assembly unit, 41. Leakage assembly turntable, 411. Valve body lateral placement seat, 42. Valve body receiving station, 43. Valve body positioning station, 431. Ejection cylinder, 44. Leakage component receiving installation station, 45. Spring installation station, 451. Spring installation manipulator, 46. Pressing cap installation station, 461. Pressing cap installation manipulator, 47. Pressing cap tightening and testing station, 48. Discharging station, 481. Discharging cylinder, 482. Conveyor belt, 49. Clip cylinder;

[0055] 5. Valve body transfer online device, 51. Valve body 90° flip mechanism, 511. Slider, 512. Rotating shaft, 513. Rocker, 514. L-shaped guide groove, 515. Valve body flip clamping cylinder, 52. Valve body transfer mechanism, 521. Horizontal rotating cylinder, 522. Valve body transfer clamping cylinder;

[0056] 6. Leakage component transfer online device, 61. Leakage component flipping mechanism, 611. Vertical rotating cylinder, 612. Leakage component flipping clamping cylinder, 62. Leakage component transfer mechanism, 621. Belt linear moving device, 622. Leakage component transfer clamping cylinder. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further specifically described below through embodiments and drawings.

[0058] Example 1

[0059] Reference Figures 1-3 In this embodiment, the safety valve 1 includes a valve body 101 having an internal leakage installation channel 102 and an external leakage installation channel 103. The valve body 101 is roughly T-shaped. The internal leakage installation channel 102 needs to be installed with an internal leakage component 104 and a filter screen 105 in sequence, wherein the filter screen matches the thread of the internal leakage installation channel; the external leakage installation channel 103 needs to be installed with an external leakage component 106, a spring 107 and a pressure cap 108 in sequence, wherein the pressure cap matches the thread of the external leakage installation channel; in this embodiment, the internal leakage component 104 is manually placed in the internal leakage installation channel 102 of the valve body 101 in advance and then loaded, and the external leakage component 106 is assembled by an assembly machine; the external leakage component 106 includes a rubber seat 109 and a pull rod 110, a stainless steel sheet 111, and a silicone gasket 112 installed in the rubber seat in sequence. In this embodiment, the internal leakage installation channel is defined as the vertical position of the valve body when it remains vertical and opens upward. At this time, the external leakage installation channel is in a horizontal state. Since the relatively lower outer side of the valve body has an external thread, the bottom end at this time is defined as the threaded end, and the vertical position facilitates the assembly of the internal leakage components; the external leakage installation channel is defined as the horizontal position when it is vertically upward, and the horizontal position facilitates the assembly of the external leakage components.

[0060] ReferenceFigures 4-18 , the safety valve assembly machine of this embodiment includes an internal leakage assembly unit 2, an external leakage component assembly unit 3, an external leakage assembly unit 4, a valve body transfer and connection device 5, and an external leakage component transfer and connection device 6. Among them, the internal leakage assembly unit 2 is mainly responsible for installing the filter screen into the internal leakage installation channel of the valve body pre-installed with the internal leakage component, and then the valve body is flipped and transferred to the external leakage assembly unit 4 through the valve body transfer and connection device 5, and the valve body is kept in a horizontal posture; the external leakage component assembly unit 3 is mainly responsible for assembling the external leakage component, and then the external leakage component is flipped and transferred to the external leakage assembly unit 4 through the external leakage component transfer and connection device 6; the external leakage assembly unit 4 is mainly responsible for sequentially installing the received external leakage component, spring, and compression cap into the external leakage installation channel of the received valve body.

[0061] The material operation of the above three assembly units all adopts an intermittently rotating turntable. Tooling for placing materials is provided at the edge of the turntable, and different workstations are distributed at the angles corresponding to the tooling on the outside of the turntable, so that the tooling enters different workstations for work sequentially and simultaneously.

[0062] Specifically, the internal leakage assembly unit 2 includes an internal leakage assembly turntable 21 with a plurality (such as 6 - 8) of valve body vertical placement seats 211 provided at the edge, and a valve body loading station 22, a valve body inspection station 23, a filter screen installation station 24, a filter screen tightening and inspection station 25, a non-conforming valve body removal station 26, and a valve body transfer station 27 distributed in sequence along the circumferential outside of the internal leakage assembly turntable in the clockwise direction. The internal leakage assembly turntable rotates intermittently in the clockwise direction so that the valve body vertical placement seats correspond to the above-mentioned respective workstations in sequence. In this embodiment, a placement groove matching the relative lower part when the valve body is in a vertical posture is provided in the valve body vertical placement seat, and a positioning groove is provided on one side of the placement groove close to the center of the turntable, so that when the valve body is placed on the valve body vertical placement seat, the external leakage channel points to the center of the internal leakage assembly turntable.

[0063] The valve body loading station 22 is provided with a die plate and a valve body loading manipulator 221 capable of grasping the valve body on the die plate to the valve body vertical placement seat. The valve body loading manipulator has degrees of freedom in the vertical and horizontal directions and adopts a support and clamp method when grasping the valve body; the die plate realizes its horizontal movement through the structure of an electric push rod (lead screw and nut structure), and the moving direction is perpendicular to the horizontal moving direction of the valve body loading manipulator. After the valve body loading manipulator takes a row of workpieces, the die plate steps horizontally to cooperate with the valve body loading manipulator to clamp another row of workpieces. During loading, the operator places the valve body pre-installed with the internal leakage component on the die plate. The valve body loading manipulator moves above the die plate, then clamps the valve body downward and lifts it to a certain height, and then moves horizontally to the valve body vertical placement seat at this station, releases the valve body after placing it downward, and completes the loading.

[0064] The valve body detection station 23 is equipped with an infrared detection device for detecting whether a valve body is placed in the corresponding vertically placed seat of the valve body. If the valve body is correctly placed, the subsequent stations for this part will work normally. If there is no valve body, the subsequent stations for this vertically placed seat of the valve body will not work.

[0065] The filter screen installation station 24 is equipped with a filter screen installation manipulator 241, which also uses the method of supporting and clamping; the filter screen is fed by a vibrating bowl feeder and then clamped by the filter screen installation manipulator and placed in the internal leakage installation channel of the valve body.

[0066] The filter screen tightening and detection station 25 is equipped with a servo motor driven by a cylinder to move up and down. The output end of the motor is provided with a tightening rod 251, and the end of the tightening rod is provided with a one-way claw matching the holes on the surface of the filter screen. The servo motor drives the tightening rod to rotate, thereby tightening the filter screen. In addition, this station is also equipped with infrared depth detection for detecting the height after the filter screen is installed, supplemented by torque monitoring of the servo motor to detect whether the filter screen is tightened in place. If there are operation errors such as stuck threads, the height of the filter screen surface and the torque of the servo motor will be abnormal (when the filter screen is correctly installed, the height of the filter screen is certain, and by comparing the value of the infrared depth detection with the elevation, it can be judged whether the filter screen is correctly installed), and it is determined that this part is a workpiece that is not correctly installed.

[0067] The unqualified valve body removal station 26 is provided with a workpiece removal manipulator 261, which clamps and removes the workpieces judged as unqualified by the filter screen tightening and detection station. On the contrary, if the workpieces judged as correctly installed by the previous station, this station will not work and release them.

[0068] The valve body transfer station 27 is equipped with a valve body discharging manipulator 271, which also uses the method of supporting and clamping, and cooperates with the valve body transfer on-line device to transfer the workpieces that have completed the installation of the internal leakage components to the external leakage assembly unit.

[0069] The valve body transfer on-line device 5 includes a valve body 90° flipping mechanism 51 and a valve body transfer mechanism 52. Among them, the valve body 90° flipping mechanism 51 is used to receive the valve body taken out by the valve body discharging manipulator and flip it 90°. The valve body transfer mechanism 52 is used to receive the valve body after being flipped by the valve body 90° flipping mechanism and linearly transfer it to the external leakage assembly unit, and horizontally rotate the valve body 180°, so that the valve body becomes in a horizontal position and the threaded end faces the external leakage assembly unit.

[0070] The valve body 90° flipping mechanism 51 includes a slider 511 that can slide horizontally under the drive of a cylinder and a rotating shaft 512 that rotatably penetrates the slider; one end of the rotating shaft is fixedly connected to a crank 513, and a bearing is provided at the free end of the crank, and the bearing is located in an L-shaped guide groove 514, so that when the slider slides, the rotating shaft can rotate 90° under the restriction of the L-shaped guide groove; the other end of the rotating shaft is fixedly connected to a valve body flipping and clamping cylinder 515 for clamping the valve body. After the valve body discharging manipulator 271 at the valve body transfer station takes out the valve body, it drives the valve body to move above the valve body flipping and clamping cylinder 515. After the valve body flipping and clamping cylinder 515 clamps the threaded end of the valve body, the valve body discharging manipulator releases it, and then the slider 511 slides under the drive of the cylinder, and at the same time drives the valve body to flip 90°, so that the valve body becomes in a horizontal pose.

[0071] The valve body transfer mechanism 52 includes an electric push rod installed between the internal leakage assembly unit and the external leakage assembly unit. The output end of the electric push rod is provided with a horizontal rotary cylinder 521, and the output end of the horizontal rotary cylinder 521 is provided with a valve body transfer and clamping cylinder 522; the valve body transfer and clamping cylinder 522 receives the valve body flipped by the valve body flipping and clamping cylinder 515, clamps its non-threaded end, linearly moves through the electric push rod and horizontally rotates 180° through the horizontal rotary cylinder 521 to transfer the valve body to the external leakage assembly unit 4, and at this time the threaded end faces the external leakage assembly unit.

[0072] The external leakage component assembly unit 3 includes an external leakage assembly turntable 31 with a plurality of (such as 8-10) rubber seat placement grooves 311 provided at the edge and a rubber seat feeding station 32, a pull rod installation station 33, a stainless steel sheet installation station 34, a stainless steel sheet detection station 35, a silicone gasket installation station 36, a silicone gasket pressing station 37, a silicone gasket detection and external leakage component transfer station 38 distributed counterclockwise in sequence along the outer circumference of the external leakage assembly turntable. The external leakage assembly turntable 31 rotates intermittently in the counterclockwise direction so that the rubber seat placement grooves 311 correspond to the above-mentioned stations in sequence. In this embodiment, the rubber seat placement grooves 311 match the bottom surface of the rubber seat, and there are holes that penetrate up and down in the middle for inserting when installing the pull rod.

[0073] The rubber seat feeding station 32 is provided with a rubber seat feeding manipulator 321, which uses a clamping method; the rubber seat is fed through a vibrating disk, and then is grabbed by the rubber seat feeding manipulator and placed into the corresponding rubber seat placement groove.

[0074] The pull rod installation station 33 is provided with a pull rod installation manipulator 331, which uses a clamping method; the pull rod is fed through a vibrating disk, and then is grabbed by the pull rod installation manipulator and inserted into the corresponding rubber seat. It should be noted that since the pull rod is a rod-shaped structure, a cylinder needs to be provided at the bottom of the end point of the vibrating disk to push the pull rod upward to facilitate the grabbing by the pull rod installation manipulator.

[0075] The stainless steel sheet installation station 34 is provided with a stainless steel sheet installation manipulator 341. Since the stainless steel sheet is flat, a vacuum suction method is adopted, that is, a hollow straw 342 is used. The tail end of the straw is connected to a vacuum generating device, and the stainless steel sheet is sucked by negative pressure. The stainless steel sheet is fed by a vibrating disk, and then sucked by the stainless steel sheet installation manipulator and placed above the inner pull rod of the corresponding rubber seat.

[0076] The stainless steel sheet detection station 35 is provided with a probe 351 and a displacement sensor that can move downward. Since the stainless steel sheet has a certain thickness, the displacement after the probe moves downward to touch the stainless steel sheet can be used to detect whether the stainless steel sheet is correctly installed. If the detection result is incorrect installation, as the turntable rotates, the subsequent stations will not work, and the workpieces will be removed by the following silicone gasket detection and leakage component transfer station; if the detection result is correct installation, the subsequent stations will work normally.

[0077] The silicone gasket installation station 36 is provided with a silicone gasket installation manipulator 361, and the same vacuum suction material taking method is adopted; the silicone gasket is fed by a vibrating disk, and then sucked by the silicone gasket installation manipulator and placed above the stainless steel sheet in the corresponding rubber seat.

[0078] The silicone gasket pressing station 37 is provided with a pressing head 371 driven by a cylinder. The bottom surface size of the pressing head is larger than the size of the rubber seat, and is used to press the silicone gasket into the rubber seat so that the silicone gasket is stuck in the opening of the rubber seat.

[0079] The silicone gasket detection and leakage component transfer station 39 is provided with a probe and a displacement sensor similar to those of the stainless steel sheet detection station. According to the thickness of the silicone gasket, the displacement after the probe moves downward to touch the silicone gasket can be used to detect whether the silicone gasket is correctly installed; the difference is that this station also needs to complete the transfer of the leakage component at the same time, so the probe needs to have a degree of freedom in the horizontal direction (driven by a cylinder in this embodiment) to avoid the removal of the leakage component. The leakage components completed by installation at this station will be transferred to the leakage assembly unit through the leakage component transfer online device.

[0080] The leakage component transfer online device 6 includes a leakage component flipping mechanism 61 and a leakage component transfer mechanism 62. The leakage component flipping mechanism 61 is used to take out the leakage components assembled by the leakage component assembly unit 3 and flip them 180°. In addition, it also needs to undertake the removal work of the workpieces with unqualified detection results from the stainless steel sheet detection station and the silicone gasket detection and leakage component transfer station. The leakage component transfer mechanism 62 is used to pick up the leakage components after being flipped by the leakage component flipping mechanism 61 and linearly transfer them to the leakage assembly unit.

[0081] The leakage component flipping mechanism 61 includes a vertical rotating cylinder 611 that can move up and down. The output end of the vertical rotating cylinder 611 is provided with a leakage component flipping clamping cylinder 612. The leakage component flipping clamping cylinder 612 clamps the workpiece of the silicone gasket detection and leakage component transfer station 38 and then moves it upward, and then flips 180 degrees, so that the pull rod is facing upward and the rubber seat is at the bottom. According to the above-mentioned test results, if it is unqualified, the leakage component flipping clamping cylinder is released at this time, so that the workpiece is released and removed. If it is qualified, the clamping state is maintained and waits for the response of the leakage component transfer mechanism.

[0082] The leakage component transfer mechanism 62 includes a belt-type linear moving device 621 (composed of a reciprocating conveyor belt and an output block fixed on the conveyor belt) erected between the leakage component assembly unit and the leakage assembly unit, and the output block of the belt-type linear moving device 621 is provided with a leakage component transfer clamping cylinder 622 which can move up and down under the drive of the cylinder; the leakage component transfer clamping cylinder 622 receives the leakage component of the leakage component flipping clamping cylinder 612, clamps the pull rod end of the leakage component, and transfers the leakage component to the leakage assembly unit 4 through linear movement.

[0083] The leakage assembly unit 4 includes a leakage assembly turntable 41 with multiple (e.g., 8-10) valve body transverse placement seats 411 on the edge, and a valve body receiving station 42, a valve body positioning station 43, a leakage component receiving installation station 44, a spring installation station 45, a pressure cap installation station 46, a pressure cap tightening and testing station 47, and a discharge station 48, which are distributed counterclockwise along the outer circumference of the leakage assembly turntable. The leakage assembly turntable 41 rotates intermittently so that the valve body transverse placement seat 411 corresponds to each of the above-mentioned stations in sequence. In this embodiment, the valve body transverse placement seat 411 includes a transverse through hole, that is, the valve body is inserted transversely, and a positioning groove is opened on the top for the leakage installation channel to be embedded.

[0084] The valve body receiving station 42 is connected to the valve body transfer online device, and the valve body transfer clamping cylinder of the valve body transfer mechanism directly inserts the valve body into the valve body transverse placement seat, with the non-threaded end facing outward (the threaded end is smaller in size for easy insertion).

[0085] The valve body positioning station 43 is provided with a pushing cylinder 431 for pushing the valve body in the transverse placement seat into place.

[0086] The leakage component receiving and installing station 44 is connected with the leakage component transfer online device 6. When the leakage component clamped by the leakage component transfer clamping cylinder 622 of the leakage component transfer mechanism 62 moves to the top of the corresponding workpiece, the leakage component transfer clamping cylinder 622 moves downward to place the leakage component into the leakage installation channel of the corresponding workpiece.

[0087] The spring installation station 45 is equipped with a spring installation manipulator 451, which uses a clamping method; the springs are fed through a vibratory bowl feeder. Since adjacent springs may be engaged with each other, making it inconvenient to grasp, a lateral pushing action needs to be set at the end of the vibratory bowl feeder to facilitate the grasping by the subsequent spring installation manipulator; after the spring installation manipulator picks up the spring, it places the spring into the external leakage installation channel of the corresponding workpiece.

[0088] The cap installation station 46 is equipped with a cap installation manipulator 461, which uses a clamping method; the caps are fed through a vibratory bowl feeder. Similarly, since the side of the cap has threads, adjacent caps may also be engaged with each other, so a lateral retracting action needs to be set at the end of the vibratory bowl feeder; after the cap installation manipulator picks up the cap, it places the cap into the external leakage installation channel.

[0089] The cap tightening and detection station 47 is similar to the filter screen tightening and detection station 25. It is also equipped with a servo motor driven by a cylinder to move up and down. The output end of the motor is provided with a tightening rod, and the end of the tightening rod is provided with a one-way claw matching the opening on the surface of the cap. The servo motor drives the tightening rod to rotate, thereby tightening the cap. Similarly, this station is also equipped with an infrared depth detection, supplemented by the torque monitoring of the servo motor, to detect whether the cap is tightened in place. If there are operation errors such as stuck threads, the height of the cap surface and the torque of the servo motor will be abnormal, and it is determined that the part is a workpiece that is not correctly installed.

[0090] It should be noted that, in order to ensure the smooth installation of the springs and caps, clip cylinders 49 that clamp the external leakage installation channels are provided at the spring installation station 45, the cap installation station 46, and the cap tightening and detection station 47, so as to fix the valve body when installing the springs and caps and avoid installation errors. (In this embodiment, the turntable can be set as a circular ring to facilitate arranging some components that need to move from the inside to the outside at the middle position of the turntable, such as the three clip cylinders and the discharging cylinder described below.)

[0091] The discharging station 48 is equipped with a discharging cylinder 481 that pushes the material from the inside to the outside, and pushes the corresponding workpiece out of the valve body horizontal placement seat. There is a conveyor belt 482 outside the discharging station, and the products discharged from the discharging station fall to the end of the conveyor belt 482; for any product discharged, the conveying direction of the product after it falls onto the conveyor belt corresponds to the detection result of the cap tightening and detection station 47 for this product: when the detection result is qualified, the product is conveyed along the conveyor belt 482; when the detection result is unqualified, the conveyor belt 482 runs in the reverse direction to make the unqualified product fall out of the conveyor belt for rejection.

[0092] The safety valve assembly machine of this embodiment is also equipped with a control system. By connecting the control system with various sensors and driving electrical devices, the orderly progress of the assembly steps is realized. The control system can be a programmable logic controller, which receives the signals of various sensors and controls the orderly operation of each cylinder or motor to achieve automated assembly.

[0093] In this embodiment, unless otherwise specified, the mentioned manipulator is a clamping cylinder with vertical freedom and horizontal linear freedom. The material grasping adopts the way of clamping or supporting and clamping. Its specific linear operation mode is a conventional technical means in the art, generally a screw-nut structure, a belt-type or chain-type conveying structure, or cylinder pushing, etc., which will not be elaborated in this embodiment.

[0094] It is worth mentioning that the assembly process completed by the safety valve assembly machine proposed in this embodiment is not the entire process of safety valve assembly. In this embodiment, several key assembly links are made continuous by means of on-line connection because the products obtained after the assembly in this embodiment need to be manually inspected for water and the pressure adjusted before the handle is installed. In addition, some empty workstations are shown in the attached drawings of the specification. These empty workstations are for some extended functions and can be ignored in this embodiment.

[0095] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. Safety valve assembly machine, the safety valve includes a valve body having an internal leakage installation channel and an external leakage installation channel, an internal leakage component and a filter screen are sequentially installed in the internal leakage installation channel, and an external leakage component, a spring and a compression cap are sequentially installed in the external leakage installation channel; Characterized in that, The safety valve assembly machine includes an internal leakage assembly unit, an external leakage component assembly unit, an external leakage assembly unit, a valve body transfer online device and an external leakage component transfer online device; The internal leakage assembly unit installs the filter screen in the internal leakage installation channel of the valve body pre-installed with the internal leakage component, and then flips and transfers the valve body to the safety valve assembly unit through the valve body transfer online device, and makes the external leakage installation channel vertical; The external leakage component assembly unit is used to assemble the external leakage component, and then flips and transfers the external leakage component to the safety valve assembly unit through the external leakage component transfer online device; The safety valve assembly unit sequentially installs the received external leakage component, spring and compression cap into the external leakage installation channel of the received valve body; The internal leakage assembly unit includes an internal leakage assembly turntable provided with a plurality of valve body vertical placement seats and a valve body loading station, a valve body detection station, a filter screen installation station, a filter screen tightening and detection station, a non-conforming valve body removal station, and a valve body transfer station distributed along the circumferential outer side of the internal leakage assembly turntable. The internal leakage assembly turntable rotates intermittently so that the valve body vertical placement seats correspond to the stations in sequence; When the valve body is placed on the valve body vertical placement seat, the internal leakage channel is vertical and the external leakage channel points to the center of the internal leakage assembly turntable; The valve body transfer online device includes: A valve body 90° flipping mechanism for taking out the valve body assembled by the internal leakage assembly unit and flipping it 90°; and A valve body transfer mechanism for receiving the valve body after being flipped by the valve body 90° flipping mechanism and linearly transferring it to the external leakage assembly unit, and horizontally rotating the valve body 180° so that the external leakage installation channel remains vertical.

2. The safety valve assembly machine according to claim 1, Characterized in that, The valve body loading station is provided with a mold plate and a valve body loading manipulator capable of grasping the valve body on the mold plate to the valve body vertical placement seat, and the mold plate can move in a direction perpendicular to the horizontal linear movement direction of the valve body loading manipulator.

3. The safety valve assembly machine according to claim 1, Characterized in that, The valve body 90° flipping mechanism includes a slider capable of horizontal sliding and a rotating shaft rotatably penetrating through the slider; one end of the rotating shaft is fixedly connected with a crank, and the free end of the crank is located in an L-shaped guide groove so that the rotating shaft can rotate 90° when the slider slides; the other end of the rotating shaft is fixedly connected with a valve body flipping clamping cylinder for clamping the valve body; The valve body transfer mechanism includes an electric push rod arranged between the internal leakage assembly unit and the external leakage assembly unit, a horizontal rotation motor is arranged at the output end of the electric push rod, and a valve body transfer clamping cylinder is arranged at the output end of the horizontal rotation motor; after the valve body transfer clamping cylinder receives the valve body of the valve body flipping clamping cylinder, it linearly moves and horizontally rotates 180° to transfer the valve body to the external leakage assembly unit.

4. The safety valve assembly machine according to claim 1, Characterized in that, The leakage component includes a rubber seat, a pull rod, a stainless steel sheet, and a silica gel gasket that are sequentially installed on the rubber seat; The leakage component assembly unit includes a leakage assembly turntable provided with a plurality of rubber seat placement grooves, and a rubber seat loading station, a pull rod installation station, a stainless steel sheet installation station, a stainless steel sheet detection station, a silica gel gasket installation station, a silica gel gasket pressing station, a silica gel gasket detection and leakage component transfer station distributed along the outer circumference of the leakage assembly turntable. The leakage assembly turntable rotates intermittently so that the rubber seat placement grooves correspond to the stations in sequence.

5. The safety valve assembly machine according to claim 1, characterized in that, The leakage component transfer and connection device includes: A leakage component flipping mechanism for taking out the leakage component assembled by the leakage component assembly unit and flipping it 180°; and A leakage component transfer mechanism for receiving the leakage component after it is flipped by the leakage component flipping mechanism and linearly transferring it to the leakage assembly unit.

6. The safety valve assembly machine according to claim 5, characterized in that, The leakage component flipping mechanism includes a vertical rotation motor capable of moving up and down, and a leakage component flipping and clamping cylinder is provided at the output end of the vertical rotation motor; The leakage component transfer mechanism includes a belt-type linear moving device installed between the leakage component assembly unit and the leakage assembly unit, and a leakage component transfer and clamping cylinder capable of moving up and down is provided at the output end of the belt-type linear moving device; after the leakage component transfer and clamping cylinder receives the leakage component of the leakage component flipping and clamping cylinder, it linearly moves the leakage component to the leakage assembly unit.

7. The safety valve assembly machine according to claim 1, characterized in that, The leakage assembly unit includes a leakage assembly turntable provided with a plurality of valve body horizontal placement seats, and a valve body receiving station, a valve body positioning station, a leakage component receiving and installation station, a spring installation station, a compression cap installation station, a compression cap tightening and detection station, and a discharging station distributed along the outer circumference of the leakage assembly turntable. The leakage assembly turntable rotates intermittently so that the valve body horizontal placement seats correspond to the stations in sequence.

8. The safety valve assembly machine according to claim 7, characterized in that, A conveyor belt is provided outside the discharging station, and the product discharged from the discharging station falls to the end of the conveyor belt; for any product discharged, the conveying direction of the product after it falls onto the conveyor belt corresponds to the detection result of the compression cap tightening and detection station for the product: when the detection result is qualified, the product is conveyed along the conveyor belt; when the detection result is unqualified, the conveyor belt conveys in the reverse direction to make the product fall out of the conveyor belt.

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