Automatic assembly workstation for stop valve

Abstract

The invention relates to the technical field of stop valve assembly, in particular to an automatic assembly workstation for stop valves, which comprises a worktable and a beam frame vertically arranged at the top end of the worktable, a pressure module is mounted on the beam frame, a rotating module is mounted on the pressure module, and two mounting tables are arranged at the top end of the worktable. The top end of the workbench is provided with two parallel sliding rails, the two sliding rails are connected with the same sliding table, the top end of the sliding table is provided with a supporting base, the top end of the supporting base is fixedly connected with a containing disc used for containing a valve body, and the top end of the containing disc is provided with four pushing mechanisms distributed at equal intervals. The four pushing mechanisms are symmetrical in pairs and are distributed front, back, left and right, the positioning mechanisms are arranged on the two pushing mechanisms distributed front and back, the cleaning mechanisms are arranged on the two pushing mechanisms distributed left and right, and the pushing mechanisms drive the positioning mechanisms and the cleaning mechanisms at different positions to jointly clamp a valve seat. And the valve seat is accurately and stably fixed to the position to be machined.

Description

Technical Field

[0001] The invention relates to the technical field of stop valve assembly, in particular to an automatic assembly workstation for stop valves. Background Art

[0002] The stop valve is mainly composed of a valve body and a valve core. The valve body is usually made of cast iron, cast steel, stainless steel and other materials. There is a channel with inconsistent height inside the valve body. Inlet and outlet are set at both ends of the channel for the flow of fluid. The water flow inside the valve body is generally low inlet and high outlet. The valve core is installed in the channel to control the on and off of the valve body. The operation is simple and easy to control, so it is widely used in water pipes in various industries.

[0003] Installing the valve core and the valve seat as one is a key step in the assembly of the stop valve. The assembly operation is completed on a workbench equipped with a rotating module, a pressure module, and a loading and unloading module. The rotating module and the pressure module are installed as one. The valve core is mainly composed of a valve stem, a valve disc installed at the bottom of the valve stem for sealing the pipeline, and a handwheel installed at the bottom of the valve stem for easy rotation.

[0004] When assembling the valve core and the valve seat, the valve seat is first placed on the workbench and fixed through the loading and unloading modules, and then the valve seat is clamped on the handwheel on the top of the valve core through the rotating module for rotation. At the same time, the pressure module applies pressure to the rotating module to move it downward to complete the tightening operation of the valve core. The accurate positioning of the valve body during assembly and the stability after positioning are extremely important. Due to the variety of valve body types and sizes, the positioning mechanism for fixing the valve body usually has limited performance. For example, for valve bodies with special appearance characteristics, only auxiliary positioning mechanisms can be added or the positioning mechanisms can be replaced to fix them. In addition, the positioning mechanism only has a single positioning performance. When the valve body positioning deviates and impurities appear in the internal channel, the threaded engagement between the valve core and the valve body will deflect. At this time, the rotating module and the pressure module forcefully assemble, which will cause damage to the valve body and the valve core, increasing the loss of finished products. Summary of the invention

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an automated assembly workstation for stop valves, comprising a workbench and a beam frame vertically arranged at the top of the workbench, a pressure module being installed on the beam frame, a rotation module being installed on the pressure module, two mounting platforms being arranged at the top of the workbench, loading and unloading modules being installed on the two mounting platforms, two parallel slide rails being arranged at the top of the workbench, the two slide rails being connected to the same slide, a support seat being arranged at the top of the slide, a placement plate for placing the valve body being fixedly connected to the top of the support seat, four equidistantly distributed pushing mechanisms being arranged at the top of the placement plate, the four pushing mechanisms being symmetrical in pairs and distributed front, back, left and right, a positioning mechanism being arranged on the two pushing mechanisms distributed front and back for positioning the valve seat in the front and back directions, and a cleaning mechanism being arranged on the two pushing mechanisms distributed left and right for positioning the valve seat in the left and right directions and for cleaning the channel.

[0006] Preferably, each of the pushing mechanisms comprises a base fixedly connected to the top edge of the placement plate, a cylinder three is horizontally installed inside the base, and an output end of the cylinder three faces the center of the placement plate and is connected to a push plate.

[0007] Preferably, the positioning mechanism includes a positioning box fixedly connected to the push plate, the interior of the positioning box is hollow and the cavity is filled with electrorheological fluid, and a plurality of pressure rods are movably embedded and connected to the interior of the positioning box, one end of the pressure rod is located at the outer part of the positioning box and is fixedly connected to a top head with a diameter larger than its own diameter, and a spring 2 is sleeved on the outer surface of the pressure rod, and the two ends of the spring 2 are respectively fixed between the outer wall of the positioning box and the top head.

[0008] Preferably, the outer surface of the positioning box is provided with a power interface for connecting to an external power source, and a copper sheet is connected between the power interface and the electrorheological fluid filled in the positioning box to electrically connect the electrorheological fluid to the power source.

[0009] Preferably, the other end of the pressure rod is located inside the positioning box and is fixedly connected to a cylindrical baffle to prevent the pressure rod at this end from moving out of the positioning box. The diameter of the baffle is larger than the diameter of the pressure rod. The inner wall of the positioning box is provided with sealing gaskets at the insertion edge of each pressure rod to prevent the electrorheological fluid filled in the cavity from leaking out.

[0010] Preferably, the cleaning mechanism includes a fixed plate fixedly connected to the push plate, a pressure block is fixedly connected to the outer surface of the fixed plate, two rows of circular holes are provided on the fixed plate, which are respectively located on both sides of the pressure block, and the number of circular holes in each row is several, and a connecting rod is movably passed through each circular hole, one end of the connecting rod is fixedly connected to a movable plate on the side away from the pressure block, the movable plate is provided with a through hole for the pressure block to movably pass through, a spring 1 is sleeved on the outer surface of the connecting rod, and the two ends of the spring 1 are respectively fixedly connected to the fixed plate and the movable plate.

[0011] Preferably, the pressure block is a truncated cone structure, the maximum bottom diameter of the pressure block is smaller than the diameter of the through hole, and the center points of the pressure block and the through hole are located on the same horizontal line, a ventilation duct with the same shape as the pressure block is opened at the center position of the pressure block, and an air connection port communicating with the channel in the pressure block is provided on the outer surface of the fixed plate for connecting the blowing pipe of the blower.

[0012] Preferably, the pressure module includes a hydraulic press installed on the top of the beam, and the output end of the hydraulic press extends downward to the bottom of the hydraulic press. The rotation module includes an extension table vertically installed at the bottom of the output end of the hydraulic press, and a servo motor is installed on the top of the extension table. The output end of the servo motor movably extends to the bottom of the extension table and is connected to a rotating clamp. The rotating clamp consists of a disc and three short columns distributed in an equidistant array at the bottom of the disc. The loading and unloading module includes an automated manipulator device installed on the top of the mounting table.

[0013] Preferably, the workbench is divided into two upper and lower surfaces, and cylinder 2 is installed between the upper surface and the lower surface through a bracket, and the bottom end of the bracket is slidably connected to the lower surface, and the output end of cylinder 2 moves upward to the top of the bracket and is connected to a limiting plate. The upper surface of the workbench is located between two slide rails and has a "U"-shaped notch. The upper surface of the workbench is also equipped with cylinder 1 located on the rear side of the notch, and the output end of cylinder 1 is connected to the rear surface of the slide, and the width of the limiting plate is greater than the width of the notch, so that the moving range of the limiting plate is limited to the area between the bracket and the upper surface of the workbench.

[0014] Preferably, a vertically upward push rod is fixedly connected to the top center position of the limiting plate, a vertically penetrating placement groove is opened at the center position of the placement disk, and a carrier plate movably located inside the placement groove is fixedly connected to the top of the push rod. Four limit grooves are also opened on the placement disk, and the four limit grooves are respectively located below the four sliding mechanisms.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When fixing the valve body, first place the valve body in the placement groove through the loading and unloading modules. The shape and position of the placement groove can enable the valve body to be initially positioned; then, the four pushing mechanisms are started simultaneously to drive the positioning mechanisms in the front and rear directions to clamp the valve body front and back, and the cleaning mechanisms in the left and right directions to clamp the valve body left and right, so as to facilitate further positioning of the valve body at the center position of the top of the placement disk; finally, the electrorheological fluid in the positioning box of the positioning mechanism is energized, and the electrorheological fluid is transformed from liquid to solid and quickly and temporarily fixes the positions of several pressure rods squeezed on the outside of the valve body. At this time, the valve body is firmly fixed on the placement disk, completing the final precise positioning of the assembly. This process makes the valve body positioning flexible and precise, and the stability after positioning is high, which greatly reduces the assembly error and thus reduces the loss of finished products.

[0016] When the positioning mechanism clamps the valve seat, the top ends of several pressure rods are respectively squeezed at different positions of the valve seat, spring 2 is compressed by external force, and the other ends of several pressure rods move inside the positioning box. Several movable pressure rods are suitable for valve bodies of different shapes and will not cause squeezing damage to the outside of the valve body. When clamping different valve seats, there is no need to replace different clamps, and the versatility is strong.

[0017] The placement plate used for assembling the stop valve is moved outward until it is out of the bottom of the rotating module during loading and unloading, and is moved back to the bottom of the rotating module during assembly. This not only leaves enough space for loading and unloading, but also reduces the movement range limit of the loading and unloading modules. In addition, when any component on the placement plate is manually operated or touched, the pressure module and the rotating module arranged above will not cause harm to the human being, thereby improving the safety of assembly production.

[0018] After the valve body is positioned, turn on the air blower connected to the air inlet. The air flow will ventilate the valve body along the internal air passage of the pressure block along the inlet and outlet of the valve body, which can blow the impurities in the valve body channel out of the body. Then the valve core can be assembled, which provides guarantee for the smooth assembly of the subsequent valve core and the use of the stop valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the workbench and its beam frame of the present invention; Figure 2 It is a schematic diagram of the structure of the top slide rail and the slide on the workbench of the present invention; Figure 3 For the present invention Figure 1 Enlarged view of part a; Figure 4 For the present invention Figure 1 A front view of Figure 5 For the present invention Figure 1 A top view of Figure 6 This is a disassembled diagram of the top structure of the placement plate of the present invention; Figure 7 It is a cross-sectional view of the internal structure of the positioning box of the positioning mechanism of the present invention; Figure 8 This is a disassembled diagram of the cleaning mechanism structure of the present invention installed on two oppositely arranged pushing mechanisms; Fig. 9 It is a schematic diagram of the structure below the workbench table of the present invention.

[0020] Description of reference numerals: Workbench; 11, beam frame; 111, hydraulic press; 112, extension table; 113, servo motor; 114, rotating clamp; 12, slide rail; 121, slide table; 122, support seat; 123, cylinder 1; 13, cylinder 2; 131, limit plate; 132, ejector rod; 14, mounting table; Placement tray; 21, placement slot; 211, carrier plate; 22, limit slot; Base; 31, cylinder three; Fixed plate; 41, pressure block; 411, air inlet; 42, connecting rod; 43, movable plate; 431, through hole; 432, spring 1; Positioning box; 51, pressure rod; 52, spring 2; 53, baffle. DETAILED DESCRIPTION

[0021] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0022] like Figure 1-6 As shown, it is the first embodiment of the present invention. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automated assembly workstation for stop valves, comprising a workbench 1 and a beam frame 11 vertically arranged at the top of the workbench 1, a pressure module is installed on the beam frame 11, a rotating module is installed on the pressure module, two mounting platforms 14 are arranged at the top of the workbench 1, and loading and unloading modules are installed on the two mounting platforms 14, the pressure module comprises a hydraulic press 111 installed at the top of the beam frame 11, the output end of the hydraulic press 111 extends downward to the bottom of the hydraulic press 111, the rotating module comprises an extension platform 112 vertically installed at the bottom of the output end of the hydraulic press 111, the extension platform 112 is driven to move up and down by the hydraulic press 111, so that the extension platform 112 drives the rotating module installed at its top The blocks move synchronously, so that the valve core is pressed down synchronously when rotating until the valve core and the valve seat are tightened. A servo motor 113 is installed on the top of the extension platform 112. The output end of the servo motor 113 moves through the bottom of the extension platform 112 and is connected to a rotating clamp 114. The rotating clamp 114 consists of a disc and three short columns distributed in an equidistant array at the bottom of the disc. When in use, the three short columns of the rotating clamp 114 are respectively inserted into the handwheel gap at the top of the valve core, and the disc is pressed on the top of the handwheel. The servo motor 113 drives the rotating clamp 114 to rotate to tighten the valve core. The loading and unloading module includes an automated manipulator device installed on the top of the mounting platform 14. The automated manipulator in the prior art has high flexibility and gripping force, and can automatically clamp the workpiece to be assembled in the area to be processed.

[0023] Further, such as Figure 2-9As shown, two parallel slide rails 12 are provided at the top of the workbench 1, and the same slide 121 is connected to the two slide rails 12. A support seat 122 is installed at the top of the slide 121, and a placement plate 2 for placing the valve body is fixedly connected to the top of the support seat 122. The workbench 1 is divided into an upper and lower table, and a cylinder 2 13 is installed between the upper table and the lower table through a bracket. The bottom end of the bracket is slidably connected to the lower table, and the output end of the cylinder 2 13 moves upward to the top of the bracket and is connected to a limiting plate 131. The upper table of the workbench 1 is located between the two slide rails 12 and has a "U"-shaped notch. The upper table of the workbench 1 is also installed There is a cylinder 123 located at the rear side of the notch, and the output end of the cylinder 123 is connected to the rear surface of the slide 121. The width of the limiting plate 131 is greater than the width of the notch, so that the movement range of the limiting plate 131 is limited to the area between the bracket and the upper surface of the workbench 1, so as to avoid that when the cylinder 2 13 is abnormal, the output end of the cylinder 13 moves too far and causes the components connected to the top of the output end to be squeezed. When loading and unloading the valve body and the valve core, one of the two loading and unloading modules can be responsible for loading the valve seat and unloading the whole after assembly, or the other loading and unloading module can be responsible for loading the valve core and unloading the whole after assembly; When loading, the slide 121 is driven by cylinder 123 to move forward along the slide rail 12 until the entire placement plate 2 moves outward to the bottom of the rotation module. During processing, the cylinder 123 moves the slide 121 back to the bottom of the rotation module, and makes the center point of the rotating clamp 114 in the rotation module and the center point of the placement plate 2 on the same vertical line. This can preliminarily ensure the assembly accuracy. When unloading the assembled stop valve, the slide 121 is driven by cylinder 123 to move forward along the slide rail 12 again until the entire placement plate 2 moves outward to the bottom of the rotation module. This not only leaves enough space for loading and unloading, but also reduces the movement range limit of the loading and unloading modules. In addition, when any component on the placement plate 2 is manually operated or touched, the pressure module and the rotation module arranged above will not cause harm to the human body, thereby improving the safety of assembly production.

[0024] Among them, a vertically upward push rod 132 is fixedly connected to the center position of the top of the limiting plate 131, a vertically penetrating placement groove 21 is opened at the center position of the placement disk 2, and a carrier plate 211 movably located inside the placement groove 21 is fixedly connected to the top of the push rod 132. Four limiting grooves 22 are also opened on the placement disk 2, and the four limiting grooves 22 are respectively located below four push mechanisms. The output end of the push mechanism can be limited by installing a slider that runs through the limiting groove 22 to ensure that the output end of the push mechanism maintains linear movement, further improving the positioning accuracy of the valve seat. When the valve seat is loaded, it is placed in the placement groove 21 by an automated manipulator. At this time, the valve seat is on the carrier plate 211. The bottom shape of most valve bodies is that its length is greater than its width, such as Figure 6 As shown, the placement groove 21 is also a groove whose length is greater than its width. After the valve body is placed inside the placement groove 21, the position of the valve body can be preliminarily limited. The height of the carrier plate 211 inside the placement groove 21 can be changed according to the height of the valve body. The lifting and lowering movement of the carrier plate 211 is achieved by starting the cylinder 2 13. The output end of the cylinder 2 13 moves up and down and drives the limiting plate 131, the push rod 132 and the carrier plate 211 to move up and down synchronously. Changing the height of the carrier plate 211 according to the height of the valve body is helpful for the subsequent positioning mechanism and the cleaning mechanism to accurately clamp and position the valve body.

[0025] When the above embodiment is working, before assembly, the slide 121 is driven by the cylinder 123 to move forward along the slide rail 12 until the entire placement plate 2 is moved outward to the bottom of the separation rotating module. First, the valve body is placed in the middle of the top of the placement plate 2 by the automatic manipulator equipment in the loading and unloading module. At this time, the valve body is in the placement groove 21. The shape and position of the placement groove 21 can preliminarily define the position of the valve body. Then, the valve core is inserted into the top of the valve seat by the automatic manipulator equipment. When assembling, the placement plate 2 is moved back to Directly below the rotating module, the three short columns of the rotating clamp 114 are respectively inserted into the handwheel gap at the top of the valve core, and the disc is pressed on the top of the handwheel. The rotating clamp 114 is driven to rotate by the servo motor 113. At the same time, the extension platform 112 is driven to move up and down by the hydraulic press 111. The valve core and the valve seat can be tightened by rotating and pressing down at the same time. After the assembly is completed, the slide 121 is driven to move forward along the slide rail 12 again by the cylinder 123 until the entire placement plate 2 moves outward to the bottom of the rotating module.

[0026] Embodiment 2, as Figure 2-8 As shown, four equidistantly distributed pushing mechanisms are installed on the top of the placing disk 2, and each pushing mechanism includes a base 3 fixedly connected to the edge of the top of the placing disk 2, and a cylinder 3 31 is horizontally installed inside the base 3, and the output end of the cylinder 3 31 faces the center of the placing disk 2 and is connected to a push plate. The four pushing mechanisms are symmetrical in pairs and are distributed front, back, left and right. When in use, the two relatively arranged pushing mechanisms can be controlled by the same controller, which is convenient for simultaneously opening and closing the two relatively placed pushing mechanisms to push and position the valve body, and further ensures that the two pushing mechanisms located on the same straight line apply the same pressure to the valve body. A pressure sensor is provided on the push plate of each pushing mechanism for real-time monitoring of the extrusion force applied by the push plate to the valve body. When the extrusion force of the push plate on the valve body reaches the value range specified by the pressure sensor, the pushing mechanism pauses to complete the clamping operation.

[0027] Among them, the two forward and backward distributed pushing mechanisms are both provided with positioning mechanisms for positioning the valve seat in the forward and backward directions. The positioning mechanisms include a positioning box 5 fixedly connected to the push plate. The interior of the positioning box 5 is hollow and the cavity is filled with electrorheological fluid. The interior of the positioning box 5 is movably embedded with a plurality of pressure rods 51. One end of the pressure rod 51 is located at the outer part of the positioning box 5 and is fixedly connected to a head having a diameter larger than its own diameter. The outer surface of the pressure rod 51 is sleeved with a spring 52. The two ends of the spring 52 are respectively fixed to the outer wall of the positioning box 5 and the head. When the valve seat is fixed, the front and rear pushing mechanisms respectively push the positioning mechanism relative to each other and squeeze the valve seat at the same time. When pressure is continuously applied, the tops of several pressure rods 51 are respectively squeezed at different positions of the valve seat, and the spring 2 52 is compressed by external force, and the other ends of several pressure rods 51 move inside the positioning box 5. In this way, not only can the valve seat be moved to the front and rear center position of the placement plate 2 to improve the positioning accuracy of the valve body, but also several movable pressure rods 51 are suitable for valve bodies of different shapes, and will not cause extrusion damage to the outside of the valve body, and have strong versatility.

[0028] Furthermore, a power interface is provided on the outer surface of the positioning box 5 for connecting to an external power source. A copper sheet is connected between the power interface and the electrorheological fluid filled in the positioning box 5, so that the electrorheological fluid is electrically connected to the power source. The other end of the pressure rod 51 is located inside the positioning box 5 and is fixedly connected to a cylindrical baffle 53 to prevent the pressure rod 51 at this end from moving out of the positioning box 5. The diameter of the baffle 53 is larger than the diameter of the pressure rod 51. The inner wall of the positioning box 5 is respectively provided with sealing gaskets at the insertion edge of each pressure rod 51 to prevent the electrorheological fluid filled in the cavity from leaking out. According to the rheological properties of the electrorheological fluid, the electrorheological fluid is a mixture of some high-dielectric small particles and low-dielectric oil, which is in the form of a high-electric field. The transformation between liquid and solid occurs in a few milliseconds and is reversible. Therefore, when power is supplied through the power interface provided on the outer surface of the positioning box 5, the electrorheological fluid filled in the positioning box 5 quickly transforms from the liquid in the initial state to a solid state. When the heads of several pressure rods 51 are pressed against the front and rear outer surfaces of the valve body and fixed, the power is turned on at this time. The electrorheological fluid temporarily fixes the positions of the pressure rods 51 and the baffle 53 inside the positioning box 5. At this time, the valve body is firmly fixed on the placement plate 2. The valve body has high stability after positioning, which greatly reduces the assembly error and thus reduces the loss of finished products. After the assembly is completed, disconnecting the power supply can transform the electrorheological fluid into a liquid state, and the internal components of the positioning box 5 can be moved.

[0029] Among them, the two push mechanisms distributed on the left and right are both provided with a cleaning mechanism for positioning the valve seat in the left and right directions and cleaning the passage. The cleaning mechanism includes a fixed plate 4 fixedly connected to the push plate, and a pressure block 41 is fixedly connected to the outer surface of the fixed plate 4. Two rows of circular holes are opened on the fixed plate 4, which are respectively located on both sides of the pressure block 41. The number of circular holes in each row is several, and a connecting rod 42 is movably penetrated in each circular hole. One end of the connecting rod 42 is fixedly connected to a moving plate 43 away from the side of the pressure block 41. The moving plate 43 is provided with a hole for the pressure block 41 to move. The through hole 431 passes through, and the outer surface of the connecting rod 42 is sleeved with a spring 432. The two ends of the spring 432 are respectively fixedly connected to the fixed plate 4 and the movable plate 43. The left and right pushing mechanisms respectively push the cleaning mechanism relative to each other and squeeze the valve seat at the same time. The movable plate 43 first contacts and squeezes the inlet and outlet positions of the valve body. When the pressure is continuously applied, the two movable plates 43 gradually push the valve body to the center position of the placement plate 2 in the left and right directions until the pressure block 41 passes through the through hole 431 and extends into the inlet and outlet of the valve body, and finally completes the fixation of the valve body in the left and right directions.

[0030] When the above embodiment is working, after the valve body is placed on the placement plate 2, two controllers that respectively control the positioning mechanism and the cleaning mechanism are started at the same time. At this time, the tops of several pressure rods 51 in the two positioning mechanisms in the front and rear directions are respectively pressed on different positions of the valve seat to move the valve seat to the front and rear center position of the placement plate 2, and the movable plates 43 of the two cleaning mechanisms in the left and right directions are pressed on the inlet and outlet positions of the valve body. When the pressure is continuously applied, the two movable plates 43 gradually push the valve body to the center position in the left and right directions of the placement plate 2 until the pressure block 41 passes through the through hole 431 and extends into the inlet and outlet positions of the valve body. Inside the outlet, the other ends of several pressure rods 51 move inside the positioning box 5. When the pressure sensor detects that the pressure value reaches the set value range, the valve seat is positioned at the center position of the top of the placement plate 2. At this time, the power is turned on, and the electrorheological fluid temporarily fixes the position of the pressure rods 51 and the baffle 53 inside the positioning box 5. At this time, the valve body is firmly fixed on the placement plate 2. The stability of the valve body after positioning is high, which greatly reduces the assembly error and thus reduces the loss of finished products. After the assembly is completed, disconnecting the power supply can convert the electrorheological fluid into liquid, and the internal components of the positioning box 5 can be moved.

[0031] Embodiment three, as Figure 8As shown, the pressure block 41 is a truncated cone structure, the maximum bottom diameter of the pressure block 41 is smaller than the diameter of the through hole 431, and the center points of the pressure block 41 and the through hole 431 are located on the same horizontal line, a ventilation channel with the same shape as the pressure block 41 is provided at the center of the pressure block 41, and an air inlet 411 which is interconnected with the inner channel of the pressure block 41 is provided on the outer surface of the fixing plate 4, and is used to connect the air blowing pipe of the blower. During the left and right positioning of the valve body by the cleaning mechanism, the pressure block 41 gradually extends into the channel of the valve body until the inlet or outlet of the valve body is completely blocked. The pressure block 41 is made of rubber and has a certain ductility, which can seal the inlet and outlet of the valve body. The ventilation channel of the pressure block 41 becomes narrower from the outside to the inside, so that the wind speed of the air outlet can be gradually increased, and then the blower is turned on to ventilate the valve body inward along the inlet and outlet respectively, so that the impurities in the valve body channel can be blown out of the body. The channel cleaning process of the valve body is applied after the positioning of the valve body is completed and before the insertion and assembly of the valve core, which provides a guarantee for the smooth assembly of the subsequent valve core and the use of the stop valve.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated assembly workstation for a stop valve, comprising a workbench (1) and a beam (11) vertically arranged at the top of the workbench (1), a pressure module being mounted on the beam (11), a rotation module being mounted on the pressure module, two mounting platforms (14) being arranged at the top of the workbench (1), loading and unloading modules being mounted on both mounting platforms (14), characterized in that: The top of the workbench (1) is provided with two parallel slide rails (12), the two slide rails (12) are connected to the same slide table (121), the top of the slide table (121) is provided with a support seat (122), the top of the support seat (122) is fixedly connected to a placement plate (2) for placing the valve body, the top of the placement plate (2) is provided with four equally spaced push mechanisms, the four push mechanisms are symmetrical in pairs and are distributed front and back, left and right, the two push mechanisms distributed front and back are provided with a positioning mechanism for positioning the valve seat in the front and back directions, and the two push mechanisms distributed left and right are provided with a cleaning mechanism for positioning the valve seat in the left and right directions and cleaning the passage; Each of the pushing mechanisms comprises a base (3) fixedly connected to the top edge of the placement plate (2), a cylinder three (31) being horizontally mounted inside the base (3), the output end of the cylinder three (31) facing the center of the placement plate (2) and being connected to a push plate; the positioning mechanism comprises a positioning box (5) fixedly connected to the push plate, the interior of the positioning box (5) being hollow and the cavity being filled with electrorheological fluid, a plurality of pressure rods (51) being movably embedded and connected inside the positioning box (5), one end of the pressure rod (51) being located at the outer part of the positioning box (5) and being fixedly connected to a head having a diameter larger than its own diameter, and a spring two (52) being sleeved on the outer surface of the pressure rod (51), the two ends of the spring two (52) being respectively fixed between the outer wall of the positioning box (5) and the head.

2. The automatic assembly workstation for stop valves according to claim 1, characterized in that: The outer surface of the positioning box (5) is provided with a power interface for connecting to an external power source, and a copper sheet is connected between the power interface and the electrorheological fluid filled in the positioning box (5), so that the electrorheological fluid and the power source are electrically connected.

3. The automatic assembly workstation for stop valves according to claim 2, characterized in that: The other end of the pressure rod (51) is located inside the positioning box (5) and is fixedly connected to a cylindrical baffle (53) to prevent the pressure rod (51) at this end from moving out of the positioning box (5). The diameter of the baffle (53) is larger than the diameter of the pressure rod (51). The inner wall of the positioning box (5) is provided with sealing gaskets at the insertion edge of each pressure rod (51) to prevent the electrorheological fluid filled in the cavity from leaking out.

4. The automatic assembly workstation for stop valves according to claim 1, characterized in that: The cleaning mechanism comprises a fixed plate (4) fixedly connected to the push plate, the outer surface of the fixed plate (4) being fixedly connected to a pressure block (41), the fixed plate (4) being provided with two rows of circular holes respectively located on both sides of the pressure block (41), the number of circular holes in each row being a plurality, and a connecting rod (42) movably passing through each circular hole, one end of the connecting rod (42) being fixedly connected to a movable plate (43) at a side away from the pressure block (41), the movable plate (43) being provided with a through hole (431) for the pressure block (41) to movably pass through, the outer surface of the connecting rod (42) being sleeved with a spring 1 (432), the two ends of the spring 1 (432) being respectively fixedly connected to the fixed plate (4) and the movable plate (43).

5. The automatic assembly workstation for stop valves according to claim 4, characterized in that: The pressure block (41) is a truncated cone structure. The maximum bottom diameter of the pressure block (41) is smaller than the diameter of the through hole (431). The center points of the pressure block (41) and the through hole (431) are located on the same horizontal line. A ventilation passage of the same shape as the pressure block (41) is provided at the center of the pressure block (41). An air inlet (411) communicating with the inner passage of the pressure block (41) is provided on the outer surface of the fixing plate (4) for connecting to the air blowing pipe of the air blower.

6. The automatic assembly workstation for stop valves according to claim 1, characterized in that: The pressure module comprises a hydraulic press (111) mounted on the top of the beam frame (11), the output end of the hydraulic press (111) extending downward to the bottom of the hydraulic press (111), the rotation module comprises an extension table (112) vertically mounted on the bottom of the output end of the hydraulic press (111), a servo motor (113) being mounted on the top of the extension table (112), the output end of the servo motor (113) movably extending to the bottom of the extension table (112) and connected to a rotation clamp (114), the rotation clamp (114) comprising a disc and three short columns at the bottom of the disc distributed in an equidistant array, and the loading and unloading module comprises an automated manipulator device mounted on the top of the mounting table (14).

7. The automatic assembly workstation for stop valves according to claim 1, characterized in that: The workbench (1) is divided into an upper and lower table, and a second cylinder (13) is installed between the upper table and the lower table through a bracket. The bottom end of the bracket is slidably connected to the lower table. The output end of the second cylinder (13) moves upward to the top of the bracket and is connected to a limiting plate (131). The upper table of the workbench (1) is located between two slide rails (12) and has a "U"-shaped notch. The upper table of the workbench (1) is also installed with a first cylinder (123) located at the rear side of the notch. The output end of the first cylinder (123) is connected to the rear surface of the slide (121). The width of the limiting plate (131) is greater than the width of the notch, so that the movement range of the limiting plate (131) is limited to the area between the bracket and the upper table of the workbench (1).

8. The automatic assembly workstation for stop valves according to claim 7, characterized in that: A vertically upward push rod (132) is fixedly connected to the center of the top end of the limiting plate (131); a vertically extending placement groove (21) is provided at the center of the placement plate (2); a carrier plate (211) movably located inside the placement groove (21) is fixedly connected to the top end of the push rod (132); and four limit grooves (22) are also provided on the placement plate (2), and the four limit grooves (22) are respectively located below the four push mechanisms.

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