Device and method for testing the air tightness of a malleable iron elbow

Abstract

The present application belongs to the technical field of pipe fitting elbow airtightness detection, and particularly relates to a cast steel elbow airtightness detection device, which comprises a material sorting device, a feeding device, a detection device and a feedback control system, wherein the material sorting device comprises a material lifting mechanism and a conveying mechanism; the feeding device comprises a mechanical arm and a magnet cylinder; the detection device comprises a plurality of detection stations, each of which comprises a detection base for placing materials; the present application uses the mechanical arm to build a detection bridge, uses the conveying mechanism to convey the materials, then uses a straight vibration mechanism to uniformly arrange the materials into a fixed posture, and on the basis of the cooperation of the mechanical arm and the magnet cylinder to suck and place the materials into the detection stations, realizes the process of airtightness detection of the materials through the cooperation of an airtightness tester and the detection base; the present application also provides an airtightness detection method based on the device, uses the feedback control system to connect the mechanisms in the device, and realizes the automation of the detection process on the premise of ensuring the detection quality.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe fitting elbow airtightness detection, and particularly relates to a malleable iron elbow airtightness detection device and a malleable iron elbow airtightness detection method using the same. BACKGROUND

[0002] As a key connecting component in an industrial pipeline system, the airtightness of a malleable iron elbow directly affects the safety and operation efficiency of the entire pipeline system. At present, the airtightness detection technology of a malleable iron elbow mainly relies on traditional manual detection methods or simple air pressure test equipment. However, these traditional methods have many problems and deficiencies, which are specifically embodied in the following aspects:

[0003] Most of the traditional airtightness detection methods rely on manual operation. On the basis of manually inflating the elbow, the elbow is immersed in water to check whether there are bubbles overflowing on the elbow wall. This method has large subjectivity of manual operation, and the airtightness detection is not rigorous and has low precision. Moreover, in the process of airtightness detection of batch elbows, manual operation also consumes a lot of time, which seriously affects the detection efficiency. Moreover, most of the existing simple air pressure test equipment is for standardized elbow components, and cannot meet the airtightness detection requirements of malleable iron elbows with multiple specifications and angles.

[0004] Therefore, how to realize efficient, precise, diversified and intelligent airtightness detection of malleable iron elbows is a technical problem faced by the current industry. SUMMARY

[0005] In view of this, the purpose of the present application is to provide a malleable iron elbow airtightness detection device, which aims to solve the problems that the detection result is not accurate and the efficiency is not high due to the reliance on manual experience in the existing malleable iron elbow airtightness detection process, and that the traditional simple air pressure test equipment cannot be used for diversified detection of elbows.

[0006] In addition, another purpose of the present application is to provide a malleable iron elbow airtightness detection method, which aims to overcome the defect that the original malleable iron airtightness detection process has low automation degree.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] The malleable iron elbow airtightness detection device is used for airtightness detection of 90° double-pass malleable iron elbows in batches, and comprises a material sorting device, a feeding device and a detection device.

[0009] The material sorting device is integrally arranged on the support frame, and the material sorting device comprises a material sorting box body, one side of the material sorting box body is provided with a material bin, and the material bin is in communication with the inside of the material sorting box body. In addition, the inside of the material sorting box body is provided with a material lifting mechanism, and the bottom end of the material lifting mechanism is flush with the bottom of the material bin for receiving the material prearranged in the material bin and lifting the material.

[0010] In addition, the material sorting device further comprises a conveying mechanism arranged at the top end of the material sorting box body and a straight vibration mechanism arranged at the output end of the conveying mechanism. The conveying mechanism comprises a conveying belt. After receiving the material lifted by the material lifting mechanism, the conveying belt conveys the material to the straight vibration mechanism. The straight vibration mechanism comprises a first vibration motor arranged on the support frame through a first support and a straight vibration guide rail arranged on the first vibration motor through a second support. After receiving the material conveyed by the conveying belt, the straight vibration mechanism provides a vibration effect based on the first vibration motor to vibrate and arrange the material on the straight vibration guide rail to complete the material sorting action.

[0011] The feeding device comprises a feeding assembly arranged on the support frame through a support frame. The feeding assembly comprises a mechanical arm, and the end of the mechanical arm is provided with a magnet air cylinder for sucking the material sorted by the material sorting device.

[0012] The detection device comprises a mounting frame comprising a working cavity and a control cavity. The inside of the working cavity is provided with a supporting plate, and the top of the supporting plate is provided with a plurality of detection stations. Each detection station comprises a detection base, and the top of the detection base is provided with a detection groove in the shape of a 90° V. The material sucked by the mechanical arm and the magnet air cylinder is placed in the detection groove for detection. In addition, the bottom of the detection base is provided with a sliding rail, and one side of the detection base is connected with a horizontal cylinder. The cylinder body of the horizontal cylinder is arranged on the supporting plate, and the piston rod of the horizontal cylinder is connected with the side wall of the detection base. Under the action of the horizontal cylinder, the detection base slides along the sliding rail.

[0013] On this basis, each detection station further comprises a vertical cylinder installed above the detection base through a cylinder frame. The end of the piston rod of the vertical cylinder is provided with a pressing block. When the detection base and the material move to the lower side of the vertical cylinder through the sliding rail, the vertical cylinder controls the pressing block to press the material on the detection base.

[0014] The detection device further comprises a gas tightness instrument arranged in the control cavity. The gas tightness instrument is connected with a gas supply pipe at the gas conveying end. The gas supply pipe is connected to the detection base and supplies gas to the detection base for detecting the gas tightness of the material.

[0015] Preferably, the stainless steel elbow airtightness detection device further comprises a feedback control system, wherein the feedback control system comprises:

[0016] The sensor assembly comprises a first pair of sensors and a second pair of sensors arranged on both sides of the conveying belt respectively, for detecting whether there is material on the conveying belt, and transmitting feedback information of whether the conveying belt is conveying material during operation to the control assembly.

[0017] The first sensor assembly comprises a first position sensor and a second position sensor, wherein the first position sensor and the second position sensor are arranged on the support frame through a first mounting bracket and a second mounting bracket respectively, and the detection end of the first position sensor is aligned with the end of the straight vibration guide rail, and the detection end of the second position sensor is aligned with the middle of the straight vibration guide rail, for detecting whether the material fills the area of the straight vibration guide rail from the end to the middle, and transmitting the first position information of the material to the mechanical arm by the first position sensor and transmitting the fourth position information of the material to the control assembly by the second position sensor.

[0018] The second sensor assembly comprises a third position sensor and a fourth position sensor, wherein the third position sensor and the fourth position sensor are arranged on the cylinder body of the horizontal cylinder respectively, and the detection end of the third position sensor is located at the position close to the piston rod of the horizontal cylinder, and the detection end of the fourth position sensor is located at the position away from the piston rod of the horizontal cylinder, in addition, the piston rod of the horizontal cylinder is further provided with a first detection site, for cooperating with the third position sensor and the fourth position sensor to detect the extension and retraction stroke of the piston rod of the horizontal cylinder, and transmitting the second position information of the piston rod of the horizontal cylinder during operation to the control assembly.

[0019] The third sensor assembly comprises a fifth position sensor and a sixth position sensor, wherein the fifth position sensor and the sixth position sensor are arranged on the cylinder body of the vertical cylinder respectively, and the detection end of the fifth position sensor is located at the position close to the piston rod of the vertical cylinder, and the detection end of the sixth position sensor is located at the position away from the piston rod of the vertical cylinder, in addition, the piston rod of the vertical cylinder is further provided with a second detection site, for cooperating with the fifth position sensor and the sixth position sensor to detect the extension and retraction stroke of the piston rod of the vertical cylinder, and transmitting the third position information of the piston rod of the vertical cylinder during operation to the control assembly.

[0020] The control assembly comprises a PLC controller arranged in the control cavity, for sending control signals for controlling the operation of the material lifting mechanism, the conveying mechanism, the straight vibration mechanism, the horizontal cylinder, the vertical cylinder and the airtightness instrument, and performing corresponding action control.

[0021] Preferably, in the material sorting device, the material lifting mechanism comprises a plurality of first lifting plates fixedly arranged inside the sorting box body and in a stepped manner, wherein the bottom end of the first lifting plate arranged at the bottom layer is flush with the bottom of the hopper, each first lifting plate is slidingly provided with a second lifting plate at the side close to the hopper, each second lifting plate is commonly connected with a power assembly at the side away from the hopper, and under the guidance of the guide assembly, a plurality of second lifting plates simultaneously perform vertical reciprocating lifting motion through the power assembly, and on this basis, when a plurality of second lifting plates simultaneously move to the upper limit, the top end of each second lifting plate is higher than the top end of the corresponding first lifting plate, so that the material is sequentially placed on the top of the corresponding first lifting plate by each second lifting plate pushing the material during the process of being lifted step by step from bottom to top.

[0022] In the material lifting mechanism, each second lifting plate is provided with a friction strip at the side close to the corresponding first lifting plate, and each friction strip is in contact with the corresponding first lifting plate during the simultaneous movement of a plurality of second lifting plates.

[0023] In addition, the top of each friction strip is in a slope shape, the side surface of the friction strip close to the top of the slope is in contact with the second lifting plate, and the top of the slope is aligned with the top of the second lifting plate, and when a plurality of second lifting plates simultaneously move to the upper limit, the bottom of each friction strip is aligned with the top of the corresponding first lifting plate, thereby forming the transition connection in spatial position between the top end of the first lifting plate and the top end of the second lifting plate.

[0024] Preferably, the power assembly comprises a group of connecting plates connecting a plurality of second lifting plates, a connecting frame is arranged between a group of connecting plates, in addition, the power assembly further comprises a driving motor connected with the connecting frame through a connecting rod assembly, the driving motor is mounted at the bottom of the sorting box body, the connecting rod assembly comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is fixedly connected with the output end of the driving motor, the other end of the first connecting rod is rotatably connected with one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the connecting frame.

[0025] The guide assembly comprises two groups of fixed plates correspondingly arranged on the two side walls of the sorting box body, a guide column is fixedly arranged between each group of fixed plates, two linear bearings are sleeved on each guide column, and the linear bearings are fixedly connected with the connecting plates.

[0026] Preferably, in the sorting device, the conveying mechanism further comprises a conveying frame for carrying the conveying belt, and an L-shaped limiting plate arranged above the conveying belt; the horizontal height of the conveying frame is higher than the horizontal height of the conveying belt; the L-shaped limiting plate is composed of a horizontal part and a vertical part connected integrally; a plurality of first adjusting holes in the shape of a long strip are arranged on the horizontal part; the L-shaped limiting plate is arranged above the conveying belt through the cooperation of the first adjusting holes, the locking bolts and the conveying frame; and the covering degree of the L-shaped limiting plate to the conveying belt is adjusted by adjusting the cooperation position of the conveying frame and the first adjusting holes, so that the conveying belt forms a conveying area with a width limit, and the width of the conveying area is the remaining width of the conveying belt after being covered by the L-shaped limiting plate, so that the material with a posture width greater than the width of the conveying area cannot be conveyed by the conveying belt and falls back into the sorting box;

[0027] In addition, a plurality of long-strip-shaped accommodation holes are arranged on the vertical part, the height of the accommodation holes on the vertical part is the same as the height of the detection end of the pair of infrared sensors, and the accommodation holes are used for accommodating the signal transmission of the detection end of the pair of infrared sensors; on this basis, the vertical part is provided with a first screening plate on the side away from the horizontal part, and the first screening plate is located at the position of the vertical part close to the direct vibration mechanism; and the first screening plate further limits the width of the conveying area to match the minimum width of the material.

[0028] The conveying mechanism further comprises a first slide arranged on the sorting box, the top end of the first slide is flush with the conveying belt, the position of the top end of the first slide corresponds to the first screening plate, and the bottom end of the first slide communicates with the sorting box, so as to collect the material screened by the first screening plate and re-lift the material.

[0029] Preferably, in the sorting device, the direct vibration mechanism further comprises a preliminary vibration assembly arranged between the direct vibration guide rail and the conveying mechanism; the preliminary vibration assembly comprises a second vibration motor arranged on the support frame through a third support, and a vibration plate arranged on the second vibration motor; the vibration plate has a certain slope, and the top of the slope of the vibration plate is connected with the output end of the conveying belt; in addition, the vibration plate is further provided with a width-adjustable limiting channel enclosed by two limiting side plates; each limiting side plate adjusts the width of the limiting channel through the cooperation of a long-strip-shaped second adjusting hole and a locking bolt and the vibration plate; on this basis, the material conveyed by the conveying mechanism is gradually vibrated and transmitted to the direct vibration guide rail under the cooperation of the limiting channel and the second vibration motor.

[0030] In the direct vibration mechanism, the direct vibration guide rail is composed of a vibration part and an arrangement part arranged integrally, and the cross sections of the vibration part and the arrangement part are both in the shape of a V with an angle of 90°.

[0031] The width of the vibration part is greater than the arrangement part, and one end of the vibration part away from the arrangement part is connected with the bottom of the slope of the vibration plate. In addition, a guide plate is vertically arranged at the position where the vibration part is connected with the vibration plate. The guide plate is composed of a guide part and a smooth slope which are arranged integrally. The height of the guide part is higher than that of the vibration plate. The smooth slope is located at one side of the guide part and extends along the direction of the straight vibration rail in the structure of slope from high to low. On the basis of the vibration of the straight vibration mechanism, the guide plate enables the pipe wall corresponding to the short radius position of the material to be buckled on the guide part, and enables the whole material to slide along the smooth slope to the vibration part. On this basis, two screening holes are staggered at the bottom of the vibration part. The two screening holes are arranged in communication, and the width of each screening hole is smaller than the straight line distance between the two end parts of the pipe wall corresponding to the long radius position of the material. Therefore, the material sliding on the smooth slope to the screening hole will be dropped from the screening hole if the material does not orthogonally cooperate with the two side walls of the 90° V-shaped vibration part. The material orthogonally cooperating with the two side walls of the 90° V-shaped vibration part will continue to slide in this posture under the action of vibration to the arrangement part for neat arrangement.

[0032] In addition, the straight vibration mechanism further comprises a second slide arranged on the material sorting box. The second slide is located directly below the screening hole, and the bottom end of the second slide is in communication with the material sorting box for collecting and re-lifting the material screened through the screening hole.

[0033] Preferably, in the detection device, the cylinder frame comprises a horizontal plate and a plurality of vertical columns. The vertical cylinder is arranged on the horizontal plate. A guide block is fixedly connected to the piston rod of the vertical cylinder. The guide block is also sleeved on the plurality of vertical columns.

[0034] In each detection station of the detection device, a gas passage is arranged in the detection base. One port of the gas passage is located on the side wall of the detection base and is in communication with the gas pipe. The other port of the gas passage is located on the side wall of the detection groove for supplying gas to the detection groove. When the material orthogonally cooperates with the two side walls of the 90° V-shaped detection groove, the port of the gas passage on the side wall of the detection groove is located within the range of the port of the material. In addition, the detection base is provided with rubber pads on the two side walls of the detection groove. When the material orthogonally cooperates with the two side walls of the 90° V-shaped detection groove and the pressing block on the vertical cylinder presses the material tightly on the detection groove, the airtight instrument supplies gas to the inside of the material.

[0035] On this basis, limit blocks are arranged on the two sides of the detection base of the detection groove for preventing the material from sliding and falling from the two sides of the detection groove.

[0036] Preferably, in the pair of sensors assembly, the first pair of sensors is located close to the input end of the conveying belt, and the second pair of sensors is located close to the output end of the conveying belt.

[0037] The feedback control system further includes photoelectric sensor components, which consist of several groups and are respectively installed in each detection station. Each photoelectric sensor component includes a photoelectric sensor installed on one side of the horizontal cylinder and a reflector installed on the support plate via a mounting plate. The position of the reflector corresponds to the detection base. The light signal emitted by the photoelectric sensor is transmitted through the detection slot to detect whether the material is in the detection slot and to transmit the material placement information to the PLC controller.

[0038] In addition, the air tightness tester is also connected to the feedback control system to determine whether the air tightness of the material meets the standard, and transmits the test results of whether the air tightness of the material meets the standard or not to the robotic arm.

[0039] Based on this, the control component also includes a control box located on one side of the material handling box. The control box is equipped with a display screen to show the operating status of each part of the malleable iron elbow airtightness testing device. Below the display screen are three control buttons for controlling the power supply to and from the malleable iron elbow airtightness testing device, as well as the device's emergency stop.

[0040] Preferably, the support frame is further provided with a third slide and a fourth slide on the side near the feeding device. Materials that meet the airtightness standard after being tested by the airtightness tester will be picked up by the robotic arm and the magnetic cylinder and placed into the third slide for collection. Materials that do not meet the airtightness standard after being tested by the airtightness tester will be picked up by the robotic arm and the magnetic cylinder and placed into the fourth slide for collection.

[0041] Furthermore, based on this malleable iron elbow airtightness testing device, the present invention also provides a method for testing the airtightness of malleable iron elbows, comprising the following steps:

[0042] S1. Preparation of the apparatus:

[0043] According to the structural dimensions of the material, adjust the width of the conveying area and the width of the limiting channel on the conveyor belt respectively, and select the specifications of the straight vibrating guide rail according to the matching relationship between the material and the screening hole. Then, start the power-on button on the control box to turn on the power and start the operation of the entire malleable iron elbow airtightness testing device. At the same time, use the feedback control system to determine that the horizontal cylinder and the vertical cylinder are in the initialization state of extension and retraction respectively.

[0044] S2. Material conveying:

[0045] The material is placed in the stock bin, and the material lifting mechanism, conveying mechanism and straight vibration mechanism start to lift, convey and arrange the material. When the reflection sensor assembly detects that there is no material on the conveying belt, the conveying belt feeds back to the PLC controller that it is not conveying material during operation. After the PLC controller receives the feedback information, it controls the subsequent straight vibration mechanism to be in a dormant state until the reflection sensor assembly detects that there is material on the conveying belt and feeds back to the PLC controller that the conveying belt is conveying material during operation. At this time, the PLC controller controls the subsequent straight vibration mechanism to resume operation.

[0046] S3, material feeding:

[0047] When the first position sensor detects that there is material at the end of the straight vibration guide rail, it feeds back the first position information of the material to the mechanical arm. The mechanical arm cooperates with the magnet cylinder to suck the material corresponding to the first position information and places it on the detection base in any detection station, and makes the material orthogonal to the two side walls of the 90° V-shaped detection groove. At this time, the material in the detection groove blocks the light signal transmission path of the photoelectric sensor assembly in the detection station, and the photoelectric sensor feeds back the placement signal of the material in the detection groove of the detection station to the PLC controller. The PLC controller controls the horizontal cylinder to operate, so that the piston rod retracts and drives the detection base to slide until the first detection point of the horizontal cylinder piston rod operates to the position of the fourth position sensor. At this time, the detection base is located directly below the vertical cylinder;

[0048] The fourth position sensor feeds back the second position information of the first detection point to the PLC controller, and the PLC controller controls the vertical cylinder to operate, so that the piston rod extends and drives the pressing block to descend until the second detection point of the vertical cylinder piston rod operates to the position of the fifth position sensor. At this time, the pressing block presses the material in the detection groove;

[0049] When the second position sensor always detects that there is material in the middle of the straight vibration guide rail within 5s, the material has filled the area of the straight vibration guide rail from its end to the middle. At this time, the second position sensor feeds back the fourth position information of the material to the PLC controller, and the PLC controller controls the pre-positioned material lifting mechanism, conveying mechanism and straight vibration mechanism to be in a dormant state until the second position sensor does not always detect that there is material in the middle of the straight vibration guide rail within 5s. The second position sensor does not feed back the fourth position information to the controller, and the PLC controller controls the material lifting mechanism, conveying mechanism and straight vibration mechanism to resume operation;

[0050] S4, air tightness detection of material:

[0051] The fifth position sensor transmits third position information of the second detection site to the PLC controller, the PLC controller controls the air tightness tester to start working, the air tightness tester inflates the material, detects the air pressure in the material in real time, detects the pressure relief time, and finally obtains the detection result of whether the material air tightness meets the standard or not, and transmits the detection result signal to the mechanical arm and the PLC controller;

[0052] S5, material returning:

[0053] After the PLC controller obtains the detection result signal of whether the air tightness meets the standard or not, the PLC controller controls the vertical cylinder to operate, so that the piston rod of the vertical cylinder is retracted and drives the pressing block to rise until the second detection site of the piston rod of the vertical cylinder operates to the position of the sixth position sensor, the sixth position sensor transmits third position information of the second detection site to the PLC controller, the PLC controller controls the horizontal cylinder to operate, so that the piston rod of the horizontal cylinder is extended and drives the detection base to slide until the first detection site of the piston rod of the horizontal cylinder operates to the position of the third position sensor;

[0054] The third position sensor transmits second position information of the first detection site to the PLC controller, the PLC controller transmits the second position information to the mechanical arm, and the mechanical arm and the magnet cylinder cooperate to suck the material on the detection base in the detection station, and according to the obtained detection result, the material is placed in the third slide or the fourth slide, and the whole process of air tightness detection of the material is completed, at this time, the horizontal cylinder and the vertical cylinder are in the initial state, so that the air tightness detection of the next material can be carried out.

[0055] The beneficial effects of the present application are:

[0056] The present application provides a glass elbow air tightness detection device, which uses a conveying mechanism to preliminarily screen and arrange the material into a target posture and then uses a straight vibration mechanism to uniformly arrange the material into a fixed posture that can be sucked by the mechanical arm and the magnet cylinder, and on the basis of the cooperation of the mechanical arm and the magnet cylinder to suck the material and place it in the detection station, the air tightness detection process of the material is realized through the cooperation of the air tightness tester and the detection base, and after the detection is completed, the material is classified and placed according to the detection result by the cooperation of the mechanical arm and the magnet cylinder, the whole process does not need manual intervention, and the detection can be completed efficiently and with high precision, thereby improving the precision and efficiency of the glass elbow air tightness detection.

[0057] In addition, the present application also provides a corresponding detection method based on the glass elbow air tightness detection device, which uses a feedback control system to connect the mechanisms in the device in series, realizes the automation of the detection process under the premise of ensuring the detection quality, and has a good use prospect under the demand of batch detection. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0059] Figure 1 The specification diagram of the elbow of the present application;

[0060] Figure 2 The overall structure diagram of the present application;

[0061] Figure 3 The specific structure diagram of the material arranging device in the present application;

[0062] Figure 4 The local structure diagram of the material lifting mechanism in the present application;

[0063] Figure 5 The position relationship diagram between the second lifting plate and the first lifting plate when the second lifting plate runs to the upper limit in the present application;

[0064] Figure 6 The specific structure diagram of the conveying mechanism in the present application;

[0065] Figure 7 The overhead structure diagram of the conveying mechanism in the present application;

[0066] Figure 8 The specific structure diagram of the straight vibration mechanism in the present application;

[0067] Figure 9 The specific structure diagram of the straight vibration guide rail in the present application;

[0068] Figure 10 The overhead structure diagram of the straight vibration guide rail in the present application;

[0069] Figure 11 The specific structure diagram of the material feeding device in the present application;

[0070] Figure 12 The local structure diagram of the detection device in the present application;

[0071] Figure 13 The specific structure diagram of the detection station in the detection device of the present application;

[0072] Figure 14 The specific structure diagram of the detection base in the present application.

[0073] In the figure: material arranging device 1, material arranging box 101, material bin 102, first lifting plate 103, second lifting plate 104, power assembly 105, guide assembly 106, connecting plate 107, connecting frame 108, driving motor 109, first connecting rod 110, second connecting rod 111, fixed plate 112, guide column 113, linear bearing 114, friction strip 115; material feeding device 2, mechanical arm 201, magnet air cylinder 202, third slide 203, fourth slide 204, support frame 205; detection device 3, mounting rack 301, working cavity 302, control cavity 303, supporting plate 304; support rack 4; material lifting mechanism 5; conveying mechanism 6, conveying belt 601, conveying rack 602, L-shaped limiting plate 603, horizontal part 604, vertical part 605, first adjusting hole 606, conveying area 607, first screening plate 608, first slide 609, first pair of sensors 610, second pair of sensors 611, let go of the hole 612; straight vibration mechanism 7, first support 701, first vibration motor 702, second support 703, straight vibration rail 704, preliminary vibration assembly 705, third support 706, second vibration motor 707, second mounting frame 708, vibration plate 709, limiting side plate 710, vibration part 711, arrangement part 712, guide plate 713, guide part 714, smooth slope 715, screening hole 716, second slide 717, first position sensor 718, second position sensor 719, first mounting frame 720; detection station 8, detection base 801, detection groove 802, sliding rail 803, horizontal air cylinder 804, air cylinder frame 805, vertical air cylinder 806, pressing block 807, gas passage 808, rubber pad 809, limiting block 810, third position sensor 811, fourth position sensor 812, fifth position sensor 813, sixth position sensor 814, photoelectric sensor 815, mounting plate 816, reflective plate 817, guide block 818, control box 819, display screen 820, horizontal plate 821, stand 822. DETAILED DESCRIPTION

[0074] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0075] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for description purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] The present application provides a stainless steel elbow airtightness detection device, which is used for batch airtightness detection of 90° double-pass stainless steel elbows. It should be noted that the 90° double-pass stainless steel elbow targeted by the present application is a commonly used connecting piece in the prior art, and the stainless steel elbow airtightness detection device provided by the present application is a special device for airtightness detection of the elbow connecting piece, but it should be noted that the device also performs batch airtightness detection on different specifications of such elbow connecting pieces, and simultaneously realizes switching detection of different specifications of elbow connecting pieces through modular design, effectively improving the standardization degree and detection efficiency of batch detection.

[0077] It should also be noted that according to the specification classification standard of pipe elbow connecting pieces in the prior art, as shown in Figure 1 The specification size of the 90° double-pass stainless steel elbow mainly has a long radius R and a short radius r according to its radius of curvature, and the difference between the long radius R and the short radius r is the outer diameter of the pipe material, and the thickness of the pipe wall is not considered in the present application.

[0078] Next, the stainless steel elbow airtightness detection device provided by the present application will be described in detail in combination with the drawings, and for the convenience of description, the 90° double-pass stainless steel elbow described in the present application will be collectively referred to as material.

[0079] In the present technical solution, as shown in Figure 2 The stainless steel elbow airtightness detection device comprises a material sorting device 1, a feeding device 2, a detection device 3 and a feedback control system, wherein:

[0080] As shown in Figures 1-5As shown, the material sorting device 1 is integrally arranged on the support frame 4, and the material sorting device 1 comprises a material sorting box body 101, one side of the material sorting box body 101 is provided with a material bin 102, and the material bin 102 is in communication with the inside of the material sorting box body 101. In addition, the inside of the material sorting box body 101 is provided with a material lifting mechanism 5, and the bottom end of the material lifting mechanism 5 is flush with the bottom of the material bin 102, which is used to receive the material prearranged in the material bin 102 and lift the material.

[0081] Specifically, as shown in Figure 3 , Figure 4 The material lifting mechanism 5 comprises a plurality of first lifting plates 103 fixedly arranged in the inside of the material sorting box body 101 and integrally arranged in a stepped manner, wherein the bottom end of the first lifting plate 103 arranged at the bottom layer is flush with the bottom of the material bin 102, and each first lifting plate 103 is slidingly provided with a second lifting plate 104 on the side close to the material bin 102. Each second lifting plate 104 is commonly connected with a power assembly 105 on the side away from the material bin 102, and under the guiding action of a guide assembly 106, a plurality of second lifting plates 104 are simultaneously subjected to reciprocating lifting movement in the vertical direction by the power assembly 105.

[0082] As shown in Figure 4 The power assembly 105 comprises a group of connecting plates 107 connecting a plurality of second lifting plates 104, and a connecting frame 108 is arranged between the group of connecting plates 107. In addition, the power assembly 105 further comprises a driving motor 109 connected with the connecting frame 108 through a connecting rod assembly, and the driving motor 109 is mounted on the bottom of the material sorting box body 101. The connecting rod assembly comprises a first connecting rod 110 and a second connecting rod 111, one end of the first connecting rod 110 is fixedly connected with the output end of the driving motor 109, the other end of the first connecting rod 110 is rotatably connected with one end of the second connecting rod 111, and the other end of the second connecting rod 111 is rotatably connected with the connecting frame 108.

[0083] The guide assembly 106 comprises two groups of fixed plates 112 correspondingly arranged on the two side walls of the material sorting box body 101, and a guide column 113 is fixedly arranged between each group of fixed plates 112. Two linear bearings 114 are sleeved on each guide column 113, and the linear bearings 114 are fixedly connected with the connecting plates 107.

[0084] Based on the above structure, the second lifting plate 104 can be subjected to reciprocating lifting movement in the vertical direction under the power provided by the power assembly 105.

[0085] And as the core movement mode of the material lifting mechanism 5 in the technical solution: when the second lifting plates 104 move to the upper limit at the same time, the top end height of each second lifting plate 104 is higher than the top end height of the corresponding first lifting plate 103, so that the material is sequentially placed on the top of the corresponding first lifting plate 103 in the process of being lifted step by step from bottom to top.

[0086] On this basis, as shown in Figure 4 , Figure 5 Each second lifting plate 104 is provided with a friction strip 115 on one side close to the corresponding first lifting plate 103, and each friction strip 115 is in friction with the corresponding first lifting plate 103 during the simultaneous movement of the second lifting plates 104. In addition, the top of each friction strip 115 is in the shape of a slope, one side of the friction strip close to the top of the slope is in contact with the second lifting plate 104, and the top of the slope is aligned with the top of the second lifting plate 104. When the second lifting plates 104 move to the upper limit at the same time, the bottom of each friction strip 115 is aligned with the top of the corresponding first lifting plate 103, thereby forming a transition connection in space position between the top end of the first lifting plate 103 and the top end of the second lifting plate 104, which is the structural basis for the material lifting mechanism 5 to lift the material step by step.

[0087] In addition, as shown in Figure 6 The material sorting device 1 further comprises a conveying mechanism 6 provided at the top end of the material sorting box 101, and a straight vibration mechanism 7 provided at the output end of the conveying mechanism 6. The conveying mechanism 6 comprises a conveying belt 601, which conveys the material lifted by the material lifting mechanism 5 to the straight vibration mechanism 7. The straight vibration mechanism 7 comprises a first vibration motor 702 provided on the support frame 4 through a first bracket 701, and a straight vibration rail 704 provided on the first vibration motor 702 through a second bracket 703. When the straight vibration mechanism 7 receives the material conveyed by the conveying belt 601, the material is vibrated and arranged on the straight vibration rail 704 based on the vibration effect provided by the first vibration motor 702, and the material sorting action is completed.

[0088] Specifically, as shown in Figure 3 , Figure 6 , Figure 7 The conveying mechanism 6 further comprises a conveying frame 602 for bearing and installing the conveying belt 601, and an L-shaped limiting plate 603 provided above the conveying belt 601. The horizontal height of the conveying frame 602 is higher than the horizontal height of the conveying belt 601. The L-shaped limiting plate 603 is composed of a horizontal part 604 and a vertical part 605 connected integrally. The horizontal part 604 is provided with a plurality of first adjusting holes 606 in the shape of a long strip. The L-shaped limiting plate 603 is placed above the conveying belt 601 by cooperating the first adjusting holes 606 with the stud bolts and the conveying frame 602.

[0089] Based on the above structure, the application adjusts the covering degree of the L-shaped limiting plate 603 to the conveying belt 601 by adjusting the matching position of the conveying frame 602 and the first adjusting hole 606, so that the conveying belt 601 forms a conveying area 607 with a width limit, and the width x1 of the conveying area 607 is the width remaining after the conveying belt 601 is covered by the L-shaped limiting plate 603, so that the material with a posture width greater than the width of the conveying area 607 cannot be conveyed by the conveying belt 601 and falls back into the material sorting box 101. The specific structure is shown in Figure 7 .

[0090] In addition, as shown in Figure 3 , Figure 7 , the vertical part 605 is provided with a first screening plate 608 on the side away from the horizontal part 604, and the first screening plate 608 is located on the vertical part 605 close to the straight vibration mechanism 7, and the first screening plate 608 further limits the width of the conveying area 607 to cooperate with the minimum width x2 of the material.

[0091] It should be noted here that the minimum width x2 of the material is the distance between the tangent line of the pipe wall corresponding to the long radius position of the material and the line connecting the two ports of the pipe wall corresponding to the short radius position of the material. The specific structure is shown in Figure 7 , and the first screening plate 608 screens and drops the material with a posture width greater than the minimum width x2 from the conveying belt 601.

[0092] On this basis, as shown in Figure 3 , the conveying mechanism 6 further comprises a first slide 609 provided on the material sorting box 101, the top end of the first slide 609 is flush with the conveying belt 601, and the position of the top end of the first slide 609 corresponds to the first screening plate 608, and the bottom end of the first slide 609 communicates with the material sorting box 101, for collecting and re-conveying the material screened by the first screening plate 608.

[0093] Furthermore, as shown in Figure 8 , the first slide 609 is provided with a second screening plate 610, and the second screening plate 610 is located on the first slide 609 close to the straight vibration mechanism 7.As shown, the straight vibration mechanism 7 further comprises a preliminary vibration assembly 705 arranged between the straight vibration guide rail 704 and the conveying mechanism 6, the preliminary vibration assembly 705 comprises a second vibration motor 707 arranged on the support frame 4 through a third support 706, and a vibration plate 709 arranged on the second vibration motor 707, the vibration plate 709 has a certain slope, and the top of the slope of the vibration plate 709 is connected with the output end of the conveying belt 601, in addition, the vibration plate 709 is further provided with a limiting channel with adjustable width formed by two limiting side plates 710, wherein each limiting side plate 710 adjusts the width of the limiting channel through the cooperation of the long strip-shaped second adjusting hole, the locking bolt and the vibration plate 709, on this basis, the material conveyed by the conveying mechanism 6 is gradually vibrated and transmitted to the straight vibration guide rail 704 under the cooperation of the limiting channel and the second vibration motor 707.

[0094] As shown in Figure 9 , the straight vibration guide rail 704 is composed of a vibration part 711 and an arrangement part 712 arranged integrally, and the cross sections of the vibration part 711 and the arrangement part 712 are both V-shaped with an angle of 90°, wherein:

[0095] The width of the vibration part 711 is greater than that of the arrangement part 712, and the end of the vibration part 711 away from the arrangement part 712 is connected with the bottom of the slope of the vibration plate 709, in addition, a guide plate 713 is vertically arranged at the position where the vibration part 711 is connected with the vibration plate 709, the guide plate 713 is composed of a guide part 714 and a smooth slope 715 arranged integrally, the height of the guide part 714 is higher than that of the vibration plate 709, and the smooth slope 715 is located on one side of the guide part 714 and extends along the direction of the straight vibration guide rail 704 from high to low slope structure.

[0096] Based on the above embodiment, on the basis of the vibration of the straight vibration mechanism 7, the guide plate 713 allows the pipe wall corresponding to the short radius position of the material to be buckled on the guide part 714, and makes the whole material slide along the smooth slope 715 to the vibration part 711, on this basis, two screening holes 716 are staggered arranged at the bottom of the vibration part 711, the two screening holes 716 are arranged in communication, and the width x3 of each screening hole 716 is less than the straight line distance x4 between the two end portions of the pipe wall corresponding to the long radius position of the material, the specific structure is shown in Figure 9 、 Figure 10 .

[0097] Therefore, the material sliding on the smooth slope 715 to the screening hole 716, the material not in orthogonal cooperation with the two side walls of the 90° V-shaped vibration part 711 will fall off from the screening hole 716, and the material in orthogonal cooperation with the two side walls of the 90° V-shaped vibration part 711 will continue to slide in this posture under the action of vibration to the arrangement part 712 for neat arrangement, the specific structure is shown in Figure 8 、 Figure 9 .

[0098] In addition, as shown in Figure 3 The straight vibration mechanism 7 also includes a second chute 717 provided on the sorting box 101, the second chute 717 is located directly below the screening hole 716, and the bottom end of the second chute 717 is in communication with the sorting box 101, for collecting and re-lifting the material screened through the screening hole 716.

[0099] In the technical solution, as shown in Figure 2 , Figure 11 The feeding device 2 includes a feeding assembly provided on the support rack 4 through the support frame 205, the feeding assembly includes a mechanical arm 201, the model of the mechanical arm 201 is SCARA, a magnet cylinder 202 is arranged at the end of the mechanical arm 201, and the magnet cylinder 202 is used to suck the material sorted on the sorting device 1.

[0100] It should be noted that the mechanical arm 201 and the magnet cylinder 202 are both used in the prior art, and the mechanical arm 201 has an independent control system and can receive external signals to control its corresponding action operation. In addition, the magnet cylinder 202 is connected to the control system of the mechanical arm 201, and the control system controls the cooperation of the mechanical arm 201 and the magnet cylinder 202. Therefore, based on the multi-degree-of-freedom operation of the mechanical arm 201 according to the instruction, the magnet cylinder 202 is powered to generate a magnetic force, and the material sorted on the sorting device 1 is sucked and placed in the detection device for air tightness detection.

[0101] In the technical solution, as shown in Figure 2 , Figure 12 , Figure 13 , Figure 14 The detection device 3 includes a mounting rack 301, the mounting rack 301 includes a working cavity 302 and a control cavity 303, the inside of the working cavity 302 is provided with a supporting plate 304, and a plurality of detection stations 8 are arranged above the supporting plate 304. Each detection station 8 includes a detection base 801, and a detection groove 802 in the shape of a 90° V is formed in the top of the detection base 801. The material sucked by the cooperation of the mechanical arm 201 and the magnet cylinder 202 is placed in the detection groove 802 and waits for detection. In addition, a sliding rail 803 is arranged at the bottom of the detection base 801, and a horizontal cylinder 804 is connected to one side of the detection base 801. The cylinder body of the horizontal cylinder 804 is arranged on the supporting plate 304, and the piston rod of the horizontal cylinder 804 is connected to the side wall of the detection base 801. Under the action of the horizontal cylinder 804, the detection base 801 slides along the sliding rail 803.

[0102] On this basis, each detection station 8 further comprises a vertical cylinder 806 installed above the detection base 801 through a cylinder frame 805, and the piston rod end of the vertical cylinder 806 is provided with a pressing block 807, when the detection base 801 runs to the lower side of the vertical cylinder 806 together with the material through the sliding rail 803, the vertical cylinder 806 controls the pressing block 807 to press the material on the detection base 801, and the device layout before the air tightness detection process of the material is completed.

[0103] Specifically, the cylinder frame 805 comprises a horizontal plate 821 and a plurality of vertical columns 822, and the vertical cylinder 806 is arranged on the horizontal plate 821, and a guide block 818 is further fixedly connected to the piston rod of the vertical cylinder 806, and the guide block 818 is also sleeved on the vertical column 822.

[0104] In order to detect the air tightness of the material, the detection device 3 further comprises an air tightness instrument arranged in the control cavity 303, and the gas conveying end of the air tightness instrument is connected with a gas supply pipe, and the gas supply pipe is used for supplying gas to the air tightness detection process of the material.

[0105] Specifically, in each detection station 8 of the detection device 3, a gas passage 808 is arranged in the inside of the detection base 801, one port of the gas passage 808 is located on the side wall of the detection base 801 and is in communication with the gas supply pipe, and the other port of the gas passage 808 is located on the side wall of the detection groove 802 and is used for supplying gas to the inside of the detection groove 802.

[0106] Based on the above embodiment, when the material is in orthogonal cooperation with the two side walls of the detection groove 802 in a 90° V-shaped manner, the port of the gas passage 808 on the side wall of the detection groove 802 is located in the range of the through port of the material, in addition, the detection base 801 is further provided with a rubber pad 809 on the two side walls of the detection groove 802, when the material is in orthogonal cooperation with the two side walls of the detection groove 802 in a 90° V-shaped manner, and the pressing block 807 on the vertical cylinder 806 presses the material on the detection groove 802, the material is in close cooperation with the rubber pad 809, at this time the air tightness instrument supplies gas to the inside of the material; on this basis, the detection base 801 is provided with a limiting block 810 on both sides of the detection groove 802, which is used for preventing the material from sliding and falling off from both sides of the detection groove 802.

[0107] In the technical solution, as shown in Figure 3 , Figure 6 As shown in the drawings, the support frame 4 is further provided with a third sliding rail 203 and a fourth sliding rail 204 on the side close to the feeding device 2, the material with air tightness meeting the standard after being detected by the air tightness instrument will be sucked and placed in the third sliding rail 203 by the cooperation of the mechanical arm 201 and the magnet cylinder 202 for collection, and the material with air tightness not meeting the standard after being detected by the air tightness instrument will be sucked and placed in the fourth sliding rail 204 by the cooperation of the mechanical arm 201 and the magnet cylinder 202 for collection.

[0108] So far, the structure for the material airtightness detection is completed, based on this, the application also builds a feedback control system for the cast steel elbow airtightness detection device, and realizes the cooperation between each device mechanism, realizes automation.

[0109] Specifically, the feedback control system comprises: a pair of sensors assembly, a first sensor assembly, a second sensor assembly and a third sensor assembly.

[0110] Among them, the pair of sensors assembly, as shown in Figure 7 includes first pair of sensors 610 and second pair of sensors 611 respectively arranged on both sides of the conveying belt 601, correspondingly, the first pair of sensors 610 is located near the input end of the conveying belt 601, the second pair of sensors 611 is located near the output end of the conveying belt 601, in addition, on the L-shaped limiting plate 603, a plurality of same long hole 612 are arranged on the vertical part 605, the height of the long hole 612 on the vertical part 605 is the same as the height of the detection end of the pair of sensors assembly, which is used for the signal transmission of the pair of sensors detection end.

[0111] Based on the above embodiment, the pair of sensors assembly is used to detect whether there is material on the conveying belt 601, and the feedback information of whether the conveying belt 601 is conveying material during operation is transmitted to the control assembly.

[0112] The first sensor assembly, as shown in Figure 11 includes first position sensor 718 and second position sensor 719, wherein the first position sensor 718 and the second position sensor 719 are arranged on the support frame 205 through the first mounting bracket 720 and the second mounting bracket 708 respectively, and the detection end of the first position sensor 718 is aligned with the end of the straight vibration guide rail 704, and the detection end of the second position sensor 719 is aligned with the middle part of the straight vibration guide rail 704.

[0113] Based on the above embodiment, the first sensor assembly is used to detect whether the material fills the area of the straight vibration guide rail 704 from the end to the middle, and the first position information of the material is transmitted to the mechanical arm 201 by the first position sensor 718, and the fourth position information of the material is transmitted to the control assembly by the second position sensor 719.

[0114] The second sensor assembly, as shown in Figure 13 includes third position sensor 811 and fourth position sensor 812, wherein the third position sensor 811 and the fourth position sensor 812 are arranged on the cylinder body of the horizontal cylinder 804 respectively, and the detection end of the third position sensor 811 is located at the position close to the piston rod of the horizontal cylinder 804, and the detection end of the fourth position sensor 812 is located at the position away from the piston rod of the horizontal cylinder 804.

[0115] Based on the above embodiment, the piston rod of the horizontal cylinder 804 is further provided with a first detection site for cooperating with the third position sensor 811 and the fourth position sensor 812 to detect the extension and retraction stroke of the piston rod of the horizontal cylinder 804 and transmit the second position information of the piston rod of the horizontal cylinder 804 to the control assembly.

[0116] The third sensor assembly, as shown in Figure 12 includes a fifth position sensor 813 and a sixth position sensor 814, wherein the fifth position sensor 813 and the sixth position sensor 814 are respectively arranged on the cylinder body of the vertical cylinder 806, and the detection end of the fifth position sensor 813 is located at the position of the vertical cylinder 806 close to the piston rod, and the detection end of the sixth position sensor 814 is located at the position of the vertical cylinder 806 away from the piston rod.

[0117] Based on the above embodiment, the piston rod of the vertical cylinder 806 is further provided with a second detection site for cooperating with the fifth position sensor 813 and the sixth position sensor 814 to detect the extension and retraction stroke of the piston rod of the vertical cylinder 806 and transmit the third position information of the piston rod of the vertical cylinder 806 to the control assembly.

[0118] The photoelectric sensor assembly, as shown in Figure 13 includes a plurality of groups and is arranged in each detection station 8, wherein the photoelectric sensor assembly includes a photoelectric sensor 815 arranged on one side of the horizontal cylinder 804 and a reflective plate 817 arranged on the supporting plate 304 through a mounting plate 816, and the position of the reflective plate 817 corresponds to the detection base 801.

[0119] Based on the above embodiment, the photoelectric sensor assembly is used to detect whether the material exists in the detection groove 802 and transmit the placement information of the material to the PLC controller.

[0120] On this basis, the air tightness instrument is also connected to the feedback control system for judging whether the air tightness of the material meets the standard, and transmitting the detection result of whether the air tightness of the material meets the standard or not to the mechanical arm 201. It should be noted that the air tightness instrument is also a prior art, which has the ability of detecting the pressure change of the measured container in real time, and is used to complete the specific air tightness detection process of the material in the present application, so the specific structure and composition of the air tightness instrument are not described here. Those skilled in the art can refer to relevant patent documents and other materials to know the specific structure and function of the air tightness instrument.

[0121] Based on the above embodiment, after the material is in orthogonal cooperation with the two side walls of the detection groove 802 in the 90° V-shaped form, the air tightness instrument supplies air to the inside of the material and detects the air pressure inside the material in real time, detects the pressure relief time, and finally obtains the detection result of whether the material air tightness meets the standard or not, completes the detection of the material air tightness, and transmits the detection result signal to the mechanical arm and the PLC controller.

[0122] The control assembly comprises a PLC controller arranged in the control cavity 303, which is used to send control signals for controlling the operation of the material lifting mechanism 5, the conveying mechanism 6, the straight vibration mechanism 7, the mechanical arm 201, the horizontal air cylinder 804, the vertical air cylinder 806, and the air tightness instrument, and to control the corresponding actions.

[0123] On this basis, as shown in Figure 2 The control assembly further comprises a control box 819 arranged on one side of the material sorting box 101, and a display screen 820 is arranged on the control box 819, which is used to display the running state of each part of the M-shaped steel elbow air tightness detection device. Three control buttons are further arranged below the display screen 820, which are used to control the power-on, power-off, and emergency stop of the M-shaped steel elbow air tightness detection device, respectively.

[0124] At this point, on the basis of the feedback control system for serially controlling each mechanism in the M-shaped steel elbow air tightness detection device, the automation of the M-shaped steel elbow air tightness detection is realized.

[0125] Finally, based on the above-mentioned M-shaped steel elbow air tightness detection device, the present application further provides an M-shaped steel elbow air tightness detection device, comprising the following steps:

[0126] S1, preparation of the device:

[0127] According to the structure and size of the material, the width of the conveying area 607 on the conveying belt 601 and the width of the limiting channel are adjusted respectively, the specification of the straight vibration guide rail 704 is selected according to the cooperation relationship between the material and the screening hole 716, and then the power-on button on the control box 819 is started to make the entire M-shaped steel elbow air tightness detection device connected to the power supply and start running. At the same time, the feedback control system is used to determine that the horizontal air cylinder 804 and the vertical air cylinder 806 are respectively in the initialized state of extension and retraction.

[0128] S2, conveying of the material:

[0129] The material is placed in the hopper 102, and the material lifting mechanism 5, the conveying mechanism 6 and the direct vibration mechanism 7 start to lift, convey and arrange the material. When the opposite sensor assembly detects that there is no material on the conveying belt 601, the conveying belt 601 feeds back to the PLC controller that it is not conveying material during operation. After receiving the feedback information, the PLC controller controls the subsequent direct vibration mechanism 7 to be in a dormant state until the opposite sensor assembly detects that there is material on the conveying belt 601 and feeds back to the PLC controller that the conveying belt 601 is conveying material during operation. At this time, the PLC controller controls the subsequent direct vibration mechanism 7 to resume operation.

[0130] S3, material feeding:

[0131] When the first position sensor 718 detects that there is material at the end of the direct vibration guide rail 704, it feeds back the first position information of the material to the mechanical arm 201. The mechanical arm 201 cooperates with the magnet air cylinder 202 to suck the material corresponding to the first position information and place it on the detection base 801 in any detection station 8, and make the material orthogonal to the two side walls of the detection groove 802 in a 90° V-shaped manner. At this time, the material in the detection groove 802 blocks the light signal transmission path of the photoelectric sensor assembly in the detection station 8. The photoelectric sensor 815 feeds back the placement signal of the material in the detection groove 802 of the detection station 8 to the PLC controller. The PLC controller controls the horizontal cylinder 804 to operate, so that the piston rod retracts and drives the detection base 801 to slide, until the first detection point of the piston rod of the horizontal cylinder 804 reaches the position of the fourth position sensor 812. At this time, the detection base 801 is located directly below the vertical cylinder 806.

[0132] The fourth position sensor 812 feeds back the second position information of the first detection point to the PLC controller. The PLC controller controls the vertical cylinder 806 to operate, so that the piston rod extends and drives the pressing block 807 to descend, until the second detection point of the piston rod of the vertical cylinder 806 reaches the position of the fifth position sensor 813. At this time, the pressing block 807 tightly presses the material in the detection groove 802.

[0133] When the second position sensor 719 always detects that there is material in the middle of the direct vibration guide rail 704 within 5s, the material has filled the area of the direct vibration guide rail 704 from its end to the middle. At this time, the second position sensor 719 feeds back the fourth position information of the material to the PLC controller. The PLC controller controls the pre-positioned material lifting mechanism 5, conveying mechanism 6 and direct vibration mechanism 7 to be in a dormant state until the second position sensor 719 does not always detect that there is material in the middle of the direct vibration guide rail 704 within 5s. The second position sensor 719 does not feed back the fourth position information to the PLC controller. The PLC controller controls the material lifting mechanism 5, the conveying mechanism 6 and the direct vibration mechanism 7 to resume operation.

[0134] S4, air tightness detection of the material:

[0135] The fifth position sensor 813 transmits the third position information of the second detection site to the PLC controller, the PLC controller controls the air tightness tester to start working, the air tightness tester inflates the material, detects the air pressure inside the material in real time, detects the pressure relief time, and finally obtains the detection result of whether the air tightness of the material meets the standard or not, and transmits the detection result signal to the mechanical arm 201 and the PLC controller.

[0136] S5, material return:

[0137] After the PLC controller obtains the detection result signal of whether the air tightness meets the standard or not, the PLC controller controls the vertical air cylinder 806 to operate, so that the piston rod of the vertical air cylinder 806 is retracted and drives the pressing block 807 to rise until the second detection site of the piston rod of the vertical air cylinder 806 operates to the position of the sixth position sensor 814, the sixth position sensor 814 transmits the third position information of the second detection site to the PLC controller, the PLC controller controls the horizontal air cylinder 804 to operate, so that the piston rod of the horizontal air cylinder 804 is extended and drives the detection base 801 to slide until the first detection site of the piston rod of the horizontal air cylinder 804 operates to the position of the third position sensor 811.

[0138] The third position sensor 811 transmits the second position information of the first detection site to the PLC controller, the PLC controller transmits the second position information to the mechanical arm 201, and the mechanical arm 201 cooperates with the magnet air cylinder 202 to suck the material on the detection base 801 in the detection station 8, and puts the material into the third slide 203 or the fourth slide 204 according to the obtained detection result, completes the whole process of air tightness detection of the material, and at this time, the horizontal air cylinder 804 and the vertical air cylinder 806 are in the initial state, so that the air tightness detection of the next material can be performed.

[0139] In the present application, the power connection form and the communication connection form of each motor in each mechanism are conventional connection forms in the art, and the present application does not limit them as long as the operation purpose can be achieved.

[0140] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, as long as they are within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc. made should be included in the protection scope of the present application.

Claims

1. An airtightness testing device for malleable iron elbows, used for batch airtightness testing of 90° double-through malleable iron elbows, characterized in that... The specification size of the 90° double-pass malleable iron elbow is determined according to the curvature radius, and the difference between the long radius R and the short radius r is the outer diameter of the pipe material, and the malleable iron elbow air tightness detection device comprises a material arranging device, a feeding device and a detection device. The material arranging device is integrally arranged on the support frame, and comprises a material arranging box body, one side of the material arranging box body is provided with a material bin, and the material bin is in communication with the inside of the material arranging box body, in addition, the inside of the material arranging box body is provided with a material lifting mechanism, and the bottom end of the material lifting mechanism is flush with the bottom of the material bin, for receiving the material prearranged in the material bin and lifting the material; In addition, the material arranging device further comprises a conveying mechanism arranged at the top end of the material arranging box body and a straight vibration mechanism arranged at the output end of the conveying mechanism, wherein the conveying mechanism comprises a conveying belt, which receives the material lifted by the material lifting mechanism and then conveys it to the straight vibration mechanism, the straight vibration mechanism comprises a first vibration motor arranged on the support frame through a first support and a straight vibration guide rail arranged on the first vibration motor through a second support, and when the straight vibration mechanism receives the material conveyed by the conveying belt, the material is vibrated and arranged on the straight vibration guide rail based on the vibration effect provided by the first vibration motor, and the material arranging action is completed; The feeding device comprises a feeding assembly arranged on the support frame through a support frame, and the feeding assembly comprises a mechanical arm, and the end of the mechanical arm is provided with a magnet air cylinder, which sucks the material arranged on the material arranging device; The detection device comprises a mounting frame, the mounting frame comprises a working cavity and a control cavity, the inside of the working cavity is provided with a supporting plate, the top of the supporting plate is provided with a plurality of detection stations, wherein each detection station comprises a detection base, the top of the detection base is provided with a detection groove in the shape of 90° V, and the material sucked by the mechanical arm and the magnet air cylinder is placed in the detection groove and waits for detection; in addition, the bottom of the detection base is provided with a sliding rail, and one side of the detection base is connected with a horizontal cylinder, the cylinder body of the horizontal cylinder is arranged on the supporting plate, the piston rod of the horizontal cylinder is connected with the side wall of the detection base, and under the operation of the horizontal cylinder, the detection base slides along the sliding rail; On this basis, each detection station further comprises a vertical cylinder installed above the detection base through a cylinder frame, the end of the piston rod of the vertical cylinder is provided with a pressing block, and when the detection base and the material run to the lower side of the vertical cylinder through the sliding rail, the vertical cylinder controls the pressing block to press the material on the detection base; The detection device further comprises an air tightness instrument arranged in the control cavity, and the gas conveying end of the air tightness instrument is connected with a gas supply pipe, the gas supply pipe is connected to the detection base, and the gas supply pipe supplies gas to the detection base, for detecting the air tightness of the material. The conveying mechanism further comprises a conveying frame for bearing the conveying belt, and an L-shaped limiting plate arranged above the conveying belt; wherein the horizontal height of the conveying frame is higher than the horizontal height of the conveying belt, the L-shaped limiting plate is composed of a horizontal part and a vertical part connected integrally, a plurality of first adjusting holes in the shape of a long strip are arranged on the horizontal part, the L-shaped limiting plate is arranged above the conveying belt through the cooperation of the first adjusting holes, the locking bolts and the conveying frame, and the covering degree of the L-shaped limiting plate to the conveying belt is adjusted by adjusting the cooperation position of the conveying frame and the first adjusting holes, so that the conveying belt forms a conveying area with a width limit, and the width of the conveying area is the remaining width of the conveying belt after being covered by the L-shaped limiting plate, so that the material with a posture width greater than the width of the conveying area cannot be conveyed by the conveying belt and falls back into the material sorting box; In addition, a plurality of long-strip-shaped accommodation holes are arranged on the vertical part, the height of the accommodation holes on the vertical part is the same as the height of the detection end of the pair of sensors, and the accommodation holes are used for accommodating the signal transmission of the detection end of the pair of sensors, on this basis, the vertical part is provided with a first screening plate on the side away from the horizontal part, and the first screening plate is located at the position of the vertical part close to the straight vibration mechanism, and the first screening plate further limits the width of the conveying area to be matched with the minimum width of the material; The conveying mechanism further comprises a first slide arranged on the material sorting box, the top end of the first slide is flush with the conveying belt, and the position of the top end of the first slide corresponds to the first screening plate, and the bottom end of the first slide communicates with the material sorting box, and is used for collecting and re-lifting the material screened by the first screening plate; The straight vibration mechanism further comprises a preliminary vibration assembly arranged between the straight vibration guide rail and the conveying mechanism, the preliminary vibration assembly comprises a second vibration motor arranged on the support frame through a third support, and a vibration plate arranged on the second vibration motor, the vibration plate has a certain slope, and the top of the slope of the vibration plate is connected with the output end of the conveying belt, in addition, the vibration plate is further provided with a width-adjustable limiting channel enclosed by two limiting side plates, wherein each limiting side plate adjusts the width of the limiting channel through the cooperation of the long-strip-shaped second adjusting hole and the locking bolt and the vibration plate, on this basis, the material conveyed by the conveying mechanism is gradually vibrated and transmitted to the straight vibration guide rail under the cooperation of the limiting channel and the second vibration motor; In the straight vibration mechanism, the straight vibration guide rail is composed of a vibration part and an arrangement part arranged integrally, and the cross sections of the vibration part and the arrangement part are both in the shape of a V with an angle of 90°, wherein: The width of the vibration part is greater than the arrangement part, and the end of the vibration part away from the arrangement part is connected with the bottom of the slope of the vibration plate. In addition, a guide plate is vertically arranged at the position where the vibration part is connected with the vibration plate. The guide plate is composed of a guide part and a smooth slope which are arranged integrally. The height of the guide part is higher than that of the vibration plate. The smooth slope is located at one side of the guide part and extends along the direction of the straight vibration rail in the structure of the slope from high to low. On the basis of the vibration of the straight vibration mechanism, the guide plate enables the pipe wall corresponding to the short radius position of the material to be buckled on the guide part, and enables the whole material to slide along the smooth slope to the vibration part. On this basis, two screening holes are staggered at the bottom of the vibration part. The two screening holes are arranged in communication, and the width of each screening hole is smaller than the straight line distance between the two end parts of the pipe wall corresponding to the long radius position of the material. Therefore, the material sliding on the smooth slope to the screening hole will be dropped from the screening hole if the material does not orthogonally cooperate with the two side walls of the 90° V-shaped vibration part. The material orthogonally cooperating with the two side walls of the 90° V-shaped vibration part will continue to slide in this posture under the action of the vibration to the arrangement part for neat arrangement. In addition, the straight vibration mechanism further comprises a second slide arranged on the material sorting box. The second slide is located directly below the screening hole, and the bottom end of the second slide is in communication with the material sorting box for collecting and re-lifting the material screened through the screening hole. In the detection device, the cylinder frame includes a horizontal plate and a plurality of vertical columns. The vertical cylinder is arranged on the horizontal plate. A guide block is fixedly connected to the piston rod of the vertical cylinder. The guide block is also sleeved on the vertical columns. In each detection station of the detection device, a gas passage is formed in the detection base. One port of the gas passage is located on the side wall of the detection base and is in communication with the gas supply pipe. The other port of the gas passage is located on the side wall of the detection groove for supplying gas to the detection groove. When the material orthogonally cooperates with the two side walls of the 90° V-shaped detection groove, the port of the gas passage on the side wall of the detection groove is located within the range of the port of the material. In addition, the detection base is provided with rubber pads on the two side walls of the detection groove. When the material orthogonally cooperates with the two side walls of the 90° V-shaped detection groove and the pressing block on the vertical cylinder presses the material tightly on the detection groove, the airtight instrument supplies gas to the inside of the material. On this basis, limit blocks are arranged on the two sides of the detection base for preventing the material from sliding and falling from the two sides of the detection groove. The glass elbow airtightness detection device further comprises a feedback control system. The feedback control system comprises: A pair of photoelectric sensors, including a first pair of photoelectric sensors and a second pair of photoelectric sensors arranged on the two sides of the conveying belt, respectively, for detecting whether there is material on the conveying belt and transmitting feedback information of whether the conveying belt is conveying material when running to the control assembly. The first sensor assembly comprises a first position sensor and a second position sensor, wherein the first position sensor and the second position sensor are arranged on the support frame through a first mounting frame and a second mounting frame respectively, the detection end of the first position sensor is aligned with the end of the straight vibration guide rail, the detection end of the second position sensor is aligned with the middle of the straight vibration guide rail, the first position sensor and the second position sensor are used for detecting whether the material fills the area from the end to the middle of the straight vibration guide rail, and the first position sensor transmits the first position information of the material to the mechanical arm, and the second position sensor transmits the fourth position information of the material to the control assembly; The second sensor assembly comprises a third position sensor and a fourth position sensor, wherein the third position sensor and the fourth position sensor are arranged on the cylinder body of the horizontal cylinder respectively, the detection end of the third position sensor is located at the position of the horizontal cylinder close to the piston rod, the detection end of the fourth position sensor is located at the position of the horizontal cylinder away from the piston rod, and in addition, the piston rod of the horizontal cylinder is further provided with a first detection site, which is used for cooperating with the third position sensor and the fourth position sensor to detect the telescopic stroke of the piston rod of the horizontal cylinder, and transmitting the second position information of the piston rod of the horizontal cylinder during operation to the control assembly; The third sensor assembly comprises a fifth position sensor and a sixth position sensor, wherein the fifth position sensor and the sixth position sensor are arranged on the cylinder body of the vertical cylinder respectively, the detection end of the fifth position sensor is located at the position of the vertical cylinder close to the piston rod, the detection end of the sixth position sensor is located at the position of the vertical cylinder away from the piston rod, and in addition, the piston rod of the vertical cylinder is further provided with a second detection site, which is used for cooperating with the fifth position sensor and the sixth position sensor to detect the telescopic stroke of the piston rod of the vertical cylinder, and transmitting the third position information of the piston rod of the vertical cylinder during operation to the control assembly; The control assembly comprises a PLC controller arranged in the control cavity, which is used for transmitting control signals for controlling the material lifting mechanism, the conveying mechanism, the straight vibration mechanism, the horizontal cylinder, the vertical cylinder and the air tightness instrument, and performing corresponding action control.

2. The device for detecting the gas tightness of a bend in a refractory according to claim 1, characterized in that: In the material sorting device, the material lifting mechanism comprises a plurality of first lifting plates arranged in a stepped manner in the interior of the material sorting box body, wherein the bottom end of the first lifting plate arranged at the bottom layer is flush with the bottom of the bin, each first lifting plate is slidingly provided with a second lifting plate on the side close to the bin, each second lifting plate is connected with a power assembly on the side away from the bin, and under the guidance of the guide assembly, a plurality of second lifting plates simultaneously perform reciprocating vertical lifting motion through the power assembly, and on this basis, when a plurality of second lifting plates simultaneously move to the upper limit, the top end height of each second lifting plate is higher than the top end height of the corresponding first lifting plate, so that the material is sequentially placed on the top of the corresponding first lifting plate during the process of being lifted from bottom to top. In the material lifting mechanism, each second lifting plate is provided with a friction strip on one side close to the corresponding first lifting plate, and each friction strip is in friction with the corresponding first lifting plate during the movement of the second lifting plates. In addition, the top of each friction strip is in a slope shape, one side of the friction strip close to the top of the slope is in contact with the second lifting plate, and the top of the slope is aligned with the top of the second lifting plate. When the second lifting plates move to the upper limit at the same time, the bottom of each friction strip is aligned with the top of the corresponding first lifting plate, thereby forming a transition connection in the spatial position between the top of the first lifting plate and the top of the second lifting plate.

3. The device for detecting the gas tightness of a bend in a refractory according to claim 2, characterized in that: The power assembly includes a set of connecting plates connecting the second lifting plates to each other, and a connecting frame is arranged between the connecting plates. In addition, the power assembly further includes a driving motor connected to the connecting frame through a connecting rod assembly. The driving motor is mounted on the bottom of the material sorting box. The connecting rod assembly includes a first connecting rod and a second connecting rod. One end of the first connecting rod is fixedly connected to the output end of the driving motor, and the other end of the first connecting rod is rotatably connected to one end of the second connecting rod. The other end of the second connecting rod is rotatably connected to the connecting frame. The guide assembly includes two sets of fixed plates corresponding to the two side walls of the material sorting box. A guide column is fixedly arranged between each set of fixed plates. Two linear bearings are sleeved on each guide column, and the linear bearings are fixedly connected to the connecting plates.

4. The device for detecting gas tightness of a malleable iron elbow according to claim 3, characterized in that: In the pair of sensors assembly, the first pair of sensors is located close to the input end of the conveying belt, and the second pair of sensors is located close to the output end of the conveying belt. The feedback control system further includes a photoelectric sensor assembly. The photoelectric sensor assembly includes a plurality of groups and is arranged in each detection station. The photoelectric sensor assembly includes a photoelectric sensor arranged on one side of the horizontal cylinder and a reflective plate arranged on the supporting plate through a mounting plate. The position of the reflective plate corresponds to the detection base. The transmission path of the light signal emitted by the photoelectric sensor passes through the detection groove, which is used to detect whether the material exists in the detection groove and to transmit the placement information of the material to the PLC controller. In addition, the air tightness tester is also connected to the feedback control system, which is used to judge whether the air tightness of the material meets the standard and to transmit the detection result of whether the air tightness of the material meets the standard or not to the mechanical arm. On this basis, the control assembly further includes a control box arranged on one side of the material sorting box. The control box is provided with a display screen for displaying the running state of each part of the Masteel elbow air tightness detection device. Three control buttons are further arranged below the display screen for respectively controlling the power-on, power-off and emergency stop of the Masteel elbow air tightness detection device.

5. The device for testing the gas tightness of a bend in a refractory according to claim 4, characterized in that: The support frame is further provided with a third slide and a fourth slide close to the feeding device. The material with air tightness meeting the standard detected by the air tightness tester is sucked and placed into the third slide for collection by the mechanical arm and the magnet cylinder. The material with air tightness not meeting the standard detected by the air tightness tester is sucked and placed into the fourth slide for collection by the mechanical arm and the magnet cylinder.

6. The method for detecting the air tightness of the glass elbow according to claim 5, characterized in that, The method comprises the following steps: S1, preparation of the device: According to the structure size of the material, the width of the conveying area on the conveying belt and the width of the limiting channel are adjusted respectively, the specification of the straight vibration guide rail is selected according to the matching relationship between the material and the screening hole, then the power on button on the control box is started to make the whole Masteel elbow air tightness detection device connected to the power supply and start running, at the same time, the feedback control system is used to determine that the horizontal cylinder and the vertical cylinder are in the initial state of extension and retraction respectively; S2, conveying of the material: The material is placed in the hopper, the material lifting mechanism, the conveying mechanism and the straight vibration mechanism start to lift, convey and arrange the material, when the transmission sensor assembly detects that there is no material on the conveying belt, the feedback information that the conveying belt does not convey material during operation is transmitted to the PLC controller, after receiving the feedback information, the PLC controller controls the subsequent straight vibration mechanism to be in a dormant state, until the transmission sensor assembly detects that there is material on the conveying belt and transmits the feedback information that the conveying belt conveys material during operation to the PLC controller, at this time, the PLC controller controls the subsequent straight vibration mechanism to resume operation; S3, feeding of the material: When the first position sensor detects that there is material at the end of the straight vibration guide rail, the first position information of the material is transmitted to the mechanical arm, the mechanical arm cooperates with the magnet air cylinder to suck the material corresponding to the first position information and put it into the detection base in any detection station, and the material is in orthogonal cooperation with the two side walls of the 90° V-shaped detection groove at this time, at this time, the material in the detection groove blocks the light signal transmission path of the photoelectric sensor assembly in the detection station, the photoelectric sensor transmits the placement signal that there is material in the detection groove of the detection station to the PLC controller, the PLC controller controls the horizontal cylinder to run, so that the piston rod is retracted and the detection base is driven to slide, until the first detection point of the horizontal cylinder piston rod runs to the position of the fourth position sensor, at this time, the detection base is located directly below the vertical cylinder; The fourth position sensor transmits the second position information of the first detection point to the PLC controller, the PLC controller controls the vertical cylinder to run, so that the piston rod is extended and the pressure block is lowered, until the second detection point of the vertical cylinder piston rod runs to the position of the fifth position sensor, at this time, the pressure block presses the material in the detection groove; When the second position sensor always detects that there is material in the middle part of the straight vibration guide rail within 5s, the material has filled the area from the end to the middle of the straight vibration guide rail, at this time, the fourth position information of the material at this position is transmitted to the PLC controller by the second position sensor, the PLC controller controls the preposed material lifting mechanism, conveying mechanism and straight vibration mechanism to be in a dormant state, until the second position sensor does not always detect that there is material in the middle part of the straight vibration guide rail within 5s, the second position sensor does not transmit the fourth position information to the controller, the PLC controller controls the material lifting mechanism, conveying mechanism and straight vibration mechanism to resume operation; S4, air tightness detection of the material: The fifth position sensor transmits third position information of the second detection site to the PLC controller, the PLC controller controls the air tightness tester to start working, the air tightness tester inflates the material, detects the air pressure in the material in real time, detects the pressure relief time, and finally obtains the detection result of whether the material air tightness meets the standard or not, and transmits the detection result signal to the mechanical arm and the PLC controller; S5, material returning: After the PLC controller obtains the detection result signal of whether the air tightness meets the standard or not, the PLC controller controls the vertical cylinder to operate, so that the piston rod of the vertical cylinder is retracted and drives the pressing block to rise until the second detection site of the piston rod of the vertical cylinder is operated to the position of the sixth position sensor, the sixth position sensor transmits third position information of the second detection site to the PLC controller, the PLC controller controls the horizontal cylinder to operate, so that the piston rod of the horizontal cylinder is extended and drives the detection base to slide until the first detection site of the piston rod of the horizontal cylinder is operated to the position of the third position sensor; The third position sensor transmits second position information of the first detection site to the PLC controller, the PLC controller transmits the second position information to the mechanical arm, and the mechanical arm and the magnet cylinder cooperate to suck the material on the detection base in the detection station, and put the material into the third slide or the fourth slide according to the obtained detection result, complete the whole process of air tightness detection of the material, at this time, the horizontal cylinder and the vertical cylinder are in the initial state, so that the air tightness detection of the next material can be carried out.

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