An automated assembly workstation for a globe valve

Abstract

The present invention relates to the technical field of globe valve assembly, and specifically relates to an automated assembly workstation for a globe valve, which includes a workbench and a beam frame vertically arranged at the top of the workbench. A pressure module is installed on the beam frame, and a rotation module is installed on the pressure module. There are two installation platforms at the top of the workbench, and loading and unloading modules are installed on both installation platforms. There are two parallel slide rails at the top of the workbench, and the same slide is connected to the two slide rails. A support seat is installed at the top of the slide, and a placement plate for placing the valve body is fixedly connected to the top of the support seat. Four equally spaced pushing mechanisms are installed at the top of the placement plate. The four pushing mechanisms are symmetrically distributed in pairs and are distributed in the front, back, left, and right directions. Positioning mechanisms are provided on the two pushing mechanisms distributed in the front and back, and cleaning mechanisms are provided on the two pushing mechanisms distributed in the left and right. The pushing mechanisms respectively drive the positioning mechanisms and cleaning mechanisms at different positions to jointly clamp the valve seat, and accurately and stably fix the valve seat at the position to be processed.

Description

Technical Field

[0001] The present invention relates to the technical field of globe valve assembly, and particularly to an automatic assembly workstation for a globe valve. Background Art

[0002] A globe valve mainly consists of a valve body and a valve core. The valve body is usually made of materials such as cast iron, cast steel, and stainless steel. There is a channel with inconsistent height inside the valve body. Inlets and outlets are respectively arranged at both ends of the channel for the flow of fluid. The water flow mode inside the valve body is generally low-in and high-out. The on-off of the valve body is controlled by installing a valve core inside the channel. The operation is simple and easy to control, so it is widely used in the water pipelines of various industries.

[0003] Installing the valve core and the valve seat as a whole is a key step in the assembly of a globe valve. The assembly operation process is completed on a workbench equipped with a rotation module, a pressure module, and a loading and unloading module. Among them, the rotation module and the pressure module are assembled as a whole. The valve core is mainly composed of a valve stem, a valve flap installed at the bottom end of the valve stem for sealing the pipeline, and a handwheel installed at the bottom end of the valve stem for convenient rotation, which are combined as a whole.

[0004] When assembling the valve core and the valve seat, first, the valve seat is placed on the workbench and fixed through the loading and unloading module, and then the rotation module grabs the handwheel at the top end of the valve core and rotates it. At the same time, the pressure module applies pressure to the rotation module to make it move downward to complete the tightening operation of the valve core. The precise 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, and the performance of the positioning mechanism for fixing the valve body is usually limited. For example, for a valve body with special-shaped external features, only an auxiliary positioning mechanism can be added or the positioning mechanism can be replaced for fixing. Also, if the positioning mechanism only has a single positioning performance, when the valve body positioning deviates and there are impurities in the internal channel, the thread engagement between the valve core and the valve body will deflect. At this time, if the rotation module and the pressure module perform forced assembly, it 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 object, the present invention provides the following technical solution: An automatic assembly workstation for a globe valve, including a workbench and a beam frame vertically arranged at the top of the workbench. A pressure module is installed on the beam frame, and a rotation module is installed on the pressure module. Two installation platforms are provided at the top of the workbench, and loading and unloading modules are installed on both installation platforms. Two parallel slide rails are provided at the top of the workbench, and the same slide is connected to the two slide rails. A support seat is installed at the top of the slide, and a placement plate for placing the valve body is fixedly connected to the top of the support seat. Four equally spaced pushing mechanisms are installed at the top of the placement plate. The four pushing mechanisms are symmetric in pairs and are distributed in the front, back, left, and right directions. Positioning mechanisms are provided on the two pushing mechanisms distributed in the front and back directions for positioning the valve seat in the front and back directions, and cleaning mechanisms are provided on the two pushing mechanisms distributed in the left and right directions for positioning the valve seat in the left and right directions and cleaning the inside of the channel.

[0006] Preferably, each of the pushing mechanisms includes a base fixedly connected to the edge of the top of the placement plate. A cylinder three is horizontally installed inside the base, and the 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 inside of the positioning box is hollow and the cavity is filled with electrorheological fluid. A number of pressure rods are movably embedded and connected inside the positioning box. One end of the pressure rod located outside the positioning box is fixedly connected to a top head with a diameter larger than its own diameter, and a spring two is sleeved on the outer surface of the pressure rod. The two ends of the spring two are respectively fixed between the outer wall of the positioning box and the top head.

[0008] Preferably, a power supply interface is provided on the outer surface of the positioning box for external power connection. A copper sheet is connected between the power supply interface and the electrorheological fluid filled inside the positioning box, so that the electrorheological fluid and the power supply are electrically connected.

[0009] Preferably, the other end of the pressure rod located inside the positioning box 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. Sealing gaskets are provided on the inner wall of the positioning box at the insertion edge of each pressure rod to prevent the electrorheological fluid filled in the cavity from leaking outwards.

[0010] Preferably, the cleaning mechanism includes a fixing plate fixedly connected to the push plate. A pressing block is fixedly connected to the outer surface of the fixing plate. Two rows of round holes are provided on the fixing plate, respectively located on both sides of the pressing block. The number of round holes in each row is several, and a connecting rod is movably penetrated through each round hole. One end of the connecting rod far from the pressing block is fixedly connected to a moving plate. A through hole for the pressing block to movably penetrate is provided on the moving plate. A spring one is sleeved on the outer surface of the connecting rod. The two ends of the spring one are respectively fixedly connected to the fixing plate and the moving plate.

[0011] Preferably, the pressing block has a frustum-shaped structure. The maximum bottom diameter of the pressing block is smaller than the diameter of the through hole, and the center points of the pressing block and the through hole are on the same horizontal line. A ventilation duct with the same shape as the pressing block is provided at the center position of the pressing block. An air intake port communicating with the inner channel of the pressing block is provided on the outer surface of the fixing plate for connecting the blowing pipe of the blower.

[0012] Preferably, the pressure module includes a hydraulic press installed at the top end of the beam frame. The output end of the hydraulic press penetrates downward to the lower part of the hydraulic press. The rotation module includes an extension platform vertically installed at the bottom end of the output end of the hydraulic press. A servo motor is installed on the top of the extension platform. The output end of the servo motor movably penetrates downward to the lower part of the extension platform and is connected with a rotating clamp. The rotating clamp consists of a disc and three short columns evenly distributed at equal intervals at the bottom end of the disc. The loading and unloading module includes an automated manipulator device installed at the top end of the installation table.

[0013] Preferably, the workbench is divided into upper and lower table surfaces. A second cylinder is installed between the upper and lower table surfaces through a bracket. The bottom end of the bracket is slidably connected to the lower table surface. The output end of the second cylinder movably penetrates upward to the top of the bracket and is connected with a limiting plate. A "U"-shaped notch is provided on the upper table surface of the workbench between the two sliding rails. A first cylinder is also installed on the upper table surface of the workbench behind the notch. The output end of the first cylinder is connected to the rear surface of the sliding table. 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 table surface of the workbench.

[0014] Preferably, a vertically upward ejector rod is fixedly connected to the center position at the top end of the limiting plate. A placement groove penetrating up and down is provided at the center position of the placement disc. The top end of the ejector rod is fixedly connected with a carrier plate movably located inside the placement groove. Four limiting grooves are also provided on the placement disc, and the four limiting grooves are respectively located below the four pushing mechanisms.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When fixing the valve body, first place the valve body in the placement groove through the loading and unloading module. The shape and position of the placement groove can preliminarily position the valve body. Subsequently, start the four pushing mechanisms simultaneously to drive the positioning mechanism in the front and rear directions to clamp the valve body in the front and rear directions, and the cleaning mechanism in the left and right directions to clamp the valve body in the left and right directions, so as to further position the valve body at the center position on the top end of the placement disc. Finally, energize the electrorheological fluid in the positioning box of the positioning mechanism. The electrorheological fluid changes from a liquid state to a solid state and quickly temporarily fixes the positions of several pressing rods extruded outside the valve body. At this time, the valve body is firmly fixed on the placement disc, completing the final precise positioning of the assembly. This process makes the positioning of the valve body flexible and precise, and has high stability after positioning, greatly reducing the assembly error and thus reducing the finished product loss.

[0017] When the positioning mechanism clamps the valve seat, the tips of several pressing rods respectively press on different positions of the valve seat. The second spring is compressed by an external force, and the other ends of several pressing rods move inside the positioning box. The several movable pressing rods are applicable to valve bodies with different shapes and will not cause extrusion damage to the outside of the valve body. When clamping different valve seats, there is no need to replace different fixtures, and the versatility is relatively strong.

[0018] When the placement tray for carrying out the assembly of the globe valve is loaded and unloaded, it moves outwards until it is separated from below the rotating module, and then moves back to directly below the rotating module during assembly. This can not only leave enough space for loading and unloading, reduce the movement range limitation of the loading and unloading module, but also when manually operating or touching any component on the placement tray, the pressure module and the rotating module arranged above will not cause harm to the operator, improving the safety of the assembly production.

[0019] After the valve body is positioned, turn on the blower connected to the outside of the air intake port. The air flow ventilates into the valve body along the internal air passage of the pressing block respectively from the inlet and outlet of the valve body, and can blow out the impurities in the valve body passage. Then, the assembly work of the valve core is carried out, providing guarantee for the subsequent smooth assembly of the valve core and the use of the globe valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 to the present application. In the drawings:

[0021] Figure 1 is a schematic diagram of the overall structure on the workbench and its beam frame of the present invention;

[0022] Figure 2 is a schematic diagram of the structure on the top slide rail and the slide table of the workbench of the present invention;

[0023] Figure 3 is of the present invention Figure 1 is an enlarged view of part a in;

[0024] Figure 4 is of the present invention Figure 1 is a front view;

[0025] Figure 5 is of the present invention Figure 1 is a top view;

[0026] Figure 6 is a split view of the top structure of the placement tray of the present invention;

[0027] Figure 7 is a cross-sectional view of the internal structure of the positioning box of the positioning mechanism of the present invention;

[0028] Figure 8 Structural exploded view of the cleaning mechanism of the present invention installed on two relatively arranged pushing mechanisms;

[0029] Figure 9 Schematic diagram of the structure under the workbench surface of the present invention.

[0030] Explanation of reference numerals:

[0031] Workbench; 11, Beam frame; 111, Hydraulic press; 112, Extension table; 113, Servo motor; 114, Rotary clamp; 12, Slide rail; 121, Slide; 122, Support seat; 123, Cylinder 1; 13, Cylinder 2; 131, Restricting plate; 132, Push rod; 14, Installation table;

[0032] Placement tray; 21, Placement groove; 211, Carrier plate; 22, Limiting groove;

[0033] Base; 31, Cylinder 3;

[0034] Fixed plate; 41, Pressing block; 411, Air connection port; 42, Connecting rod; 43, Moving plate; 431, Through hole; 432, Spring 1;

[0035] Positioning box; 51, Pressing rod; 52, Spring 2; 53, Baffle. Detailed implementation manners

[0036] The following will cooperate with the drawings and embodiments to detail the implementation manners of the present application, so as to fully understand how the present application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0037] As Figures 1-6As shown in the figure, this is the first embodiment of the present invention. To achieve the above object, the present invention provides the following technical solutions: An automated assembly workstation for a globe valve includes a workbench 1 and a beam frame 11 vertically provided at the top of the workbench 1. A pressure module is installed on the beam frame 11, and a rotation module is installed on the pressure module. Two mounting platforms 14 are provided at the top of the workbench 1, and a loading and unloading module is installed on each of the two mounting platforms 14. The pressure module includes a hydraulic press 111 installed at the top of the beam frame 11. The output end of the hydraulic press 111 penetrates downward to the lower part of the hydraulic press 111. The rotation module includes an extension platform 112 vertically installed at the bottom end of the output end of the hydraulic press 111. The hydraulic press 111 is controlled to drive the extension platform 112 to move up and down, so that the extension platform 112 drives the rotation module installed at its top to move synchronously, facilitating synchronous downward pressure when rotating the valve core until the valve core is tightened with the valve seat. A servo motor 113 is installed at the top of the extension platform 112. The output end of the servo motor 113 movably penetrates to the lower part 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 evenly distributed at equal intervals at the bottom end of the disc. During use, the three short columns of the rotating clamp 114 are respectively inserted into the handwheel gaps at the top of the valve core, and the disc is pressed on the top of the handwheel. The valve core is tightened by driving the rotating clamp 114 to rotate through the servo motor 113. The loading and unloading module includes an automated manipulator device installed at the top of the mounting platform 14. In the prior art, the automated manipulator has high flexibility and grasping force, and can automatically clamp the workpiece to be assembled and place it in the processing area.

[0038] Further, as Figures 2-9 shown, two parallel slide rails 12 are provided at the top of the workbench 1. The same slide table 121 is connected to the two slide rails 12. A support seat 122 is installed at the top of the slide table 121. A placement tray 2 for placing the valve body is fixedly connected to the top of the support seat 122. The workbench 1 is divided into upper and lower table surfaces. A cylinder two 13 is installed between the upper table surface and the lower table surface through a bracket. The bottom end of the bracket is slidably connected to the lower table surface. The output end of the cylinder two 13 movably penetrates upward to the top of the bracket and is connected to a limiting plate 131. A "U"-shaped notch is opened between the two slide rails 12 on the upper table surface of the workbench 1. A cylinder one 123 is also installed on the upper table surface of the workbench 1 behind the notch. The output end of the cylinder one 123 is connected to the rear surface of the slide table 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 surface of the workbench 1, avoiding that when the cylinder two 13 malfunctions, the output end moves too far and causes the components connected to the top of the output end to be greatly 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 overall unloading after assembly, or the other loading and unloading module can be responsible for loading the valve core and overall unloading after assembly;

[0039] During feeding, the cylinder 123 drives the slide 121 to move forward along the slide rail 12 until the entire placement plate 2 moves outwards to be separated from below the rotation module. During processing, the cylinder 123 moves the slide 121 back to directly below the rotation module and aligns the center point of the rotation clamp 114 in the rotation module with the center point of the placement plate 2 on the same vertical line, which can initially ensure the assembly accuracy. When the assembled stop valve is unloaded, the cylinder 123 drives the slide 121 to move forward along the slide rail 12 again until the entire placement plate 2 moves outwards to be separated from below the rotation module. This not only provides sufficient space for loading and unloading, reducing the movement range limitation of the loading and unloading module, but also when manually operating or touching any component on the placement plate 2, the pressure module and the rotation module above will not cause harm to the operator, improving the safety of the assembly production.

[0040] Among them, a vertically upward ejector rod 132 is fixedly connected to the center position at the top end of the limiting plate 131. A placement groove 21 that penetrates up and down is provided at the center position of the placement plate 2. The top end of the ejector rod 132 is fixedly connected to a carrier plate 211 that is movably located inside the placement groove 21. Four limiting grooves 22 are also provided on the placement plate 2, and the four limiting grooves 22 are respectively located directly below the four pushing mechanisms. The output end of the pushing mechanism can be limited by installing a slider penetrating inside the limiting groove 22 to ensure that the output end of the pushing mechanism moves in a straight line, further improving the positioning accuracy of the valve seat. When the valve seat is fed, 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 the vast majority of valve bodies is that its length is greater than its width. As Figure 6 shown, the placement groove 21 is also a groove with a length greater than its width. After the valve body is placed inside the placement groove 21, the position of the valve body can be initially limited. According to the height of the valve body, the height of the carrier plate 211 inside the placement groove 21 can be changed. The lifting movement of the carrier plate 211 is completed by starting the cylinder 13. The output end of the cylinder 13 moves up and down and drives the limiting plate 131, the ejector 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 helps the subsequent positioning mechanism and cleaning mechanism to accurately clamp and position the valve body.

[0041] When the above-mentioned embodiment works, before assembly, the cylinder 123 drives the sliding table 121 to move forward along the slide rail 12 until the entire placement plate 2 moves outwards until it is out of the lower part of the rotating module. First, the valve body is placed at the middle position at the top of the placement plate 2 through the automatic manipulator device 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 limit the position of the valve body. Then, the valve core is inserted on the top of the valve seat through the automatic manipulator device. During assembly, 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 gaps 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 hydraulic press 111 controls the driving extension table 112 to move up and down. Only by rotating and pressing down at the same time can the valve core and the valve seat be tightened. After the assembly is completed, the cylinder 123 drives the sliding table 121 to move forward along the slide rail 12 again until the entire placement plate 2 moves outwards until it is out of the lower part of the rotating module.

[0042] Embodiment 2, as Figures 2-8 shown, four equally spaced pushing mechanisms are installed at the top of the placement plate 2. Each pushing mechanism includes a base 3 fixedly connected to the edge of the top of the placement plate 2. A cylinder three 31 is horizontally installed inside the base 3. The output end of the cylinder three 31 faces the center of the placement plate 2 and is connected to a push plate. The four pushing mechanisms are symmetric in pairs and are distributed in the front, back, left, and right directions. When in use, two relatively arranged pushing mechanisms can be controlled by the same controller, which is convenient for simultaneously opening and closing the two relatively arranged pushing mechanisms to push and position the valve body, further ensuring that the pressures exerted on the valve body by the two pushing mechanisms on the same straight line are the same. A pressure sensor is arranged on the push plate of each pushing mechanism to monitor the magnitude of the extrusion force exerted on the valve body by the push plate in real time. When the extrusion force of the push plate on the valve body reaches the value range defined by the pressure sensor, the pushing mechanism pauses to complete the clamping operation.

[0043] Among them, positioning mechanisms are provided on both of the front and rear distribution shifting mechanisms for positioning the valve seat in the front and rear directions. The positioning mechanism includes a positioning box 5 fixedly connected to the push plate. The inside of the positioning box 5 is hollow and filled with electrorheological fluid. A number of pressure rods 51 are movably embedded and connected inside the positioning box 5. One end of the pressure rod 51 located outside the positioning box 5 is fixedly connected with a head having a diameter larger than its own diameter. And a second spring 52 is sleeved on the outer surface of the pressure rod 51. The two ends of the second spring 52 are respectively fixed between the outer wall of the positioning box 5 and the head. When fixing the valve seat, the front and rear two shifting mechanisms respectively relatively shift and simultaneously squeeze the valve seat with respect to the positioning mechanism. When continuously applying pressure, the heads of a number of pressure rods 51 respectively squeeze at different positions of the valve seat. The second spring 52 is compressed by an external force. The other ends of a number of 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 positions of the placement plate 2 to improve the valve body positioning accuracy, but also a number of movable pressure rods 51 are applicable to valve bodies with different shapes and will not cause extrusion damage to the outside of the valve body, and the versatility is relatively strong.

[0044] Further, a power supply interface is provided on the outer surface of the positioning box 5 for connecting to an external power supply. A copper sheet is connected between the power supply interface and the electrorheological fluid filled inside the positioning box 5 to make the electrorheological fluid and the power supply electrically connected. The other end of the pressure rod 51 located inside the positioning box 5 is fixedly connected with 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. Sealing gaskets are respectively provided on the inner wall of the positioning box 5 at the insertion edges of each pressure rod 51 to prevent the electrorheological fluid filled in the cavity from leaking outwards. 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 fluid. It presents a transformation between a liquid and a solid under the action of a high electric field. The transformation time is several milliseconds and the transformation is reversible. Therefore, when the power is turned on through the power supply interface provided on the outer surface of the positioning box 5, the electrorheological fluid filled inside the positioning box 5 quickly changes from the initial liquid state to a solid state. When the heads of a number of pressure rods 51 squeeze on the front and rear outer surfaces of the valve body and are fixed, at this time, the power is turned on, and the electrorheological fluid temporarily fixes the positions of the pressure rods 51 and the baffle 53 located 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, greatly reducing the assembly error, and further reducing the finished product loss. After the assembly is completed, disconnecting the power supply can make the electrorheological fluid change into a liquid state, and the internal components of the positioning box 5 can move.

[0045] Among them, cleaning mechanisms are provided on both of the left and right distribution pushing mechanisms for positioning the valve seat in the left and right directions and cleaning the inside of the channel. The cleaning mechanism includes a fixing plate 4 fixedly connected to the push plate. A pressing block 41 is fixedly connected to the outer surface of the fixing plate 4. Two rows of circular holes are provided on the fixing plate 4, respectively located on both sides of the pressing block 41. The number of circular holes in each row is several, and a connecting rod 42 is movably penetrated through each circular hole. One end of the connecting rod 42 far from the pressing block 41 is fixedly connected with a moving plate 43. A through hole 431 for the pressing block 41 to movably penetrate is provided on the moving plate 43. A first spring 432 is sleeved on the outer surface of the connecting rod 42. Two ends of the first spring 432 are respectively fixedly connected to the fixing plate 4 and the moving plate 43. The left and right pushing mechanisms respectively relatively push the cleaning mechanism to simultaneously squeeze the valve seat. The moving plate 43 first contacts and squeezes at the inlet and outlet positions of the valve body. When continuously applying pressure, the two moving plates 43 gradually push the valve body to the central position in the left and right directions of the placing plate 2 until the pressing block 41 penetrates through the through hole 431 and extends into the inside of the inlet and outlet of the valve body, and finally the fixing of the valve body in the left and right directions is completed.

[0046] When the above embodiment works, after the valve body is placed on the placing plate 2, two controllers respectively controlling the positioning mechanism and the cleaning mechanism are started at the same time. At this time, the tips of several pressing rods 51 in the two positioning mechanisms in the front and back directions respectively relatively squeeze at different positions of the valve seat, and the valve seat is moved to the front and back central position of the placing plate 2. The moving plates 43 of the two cleaning mechanisms in the left and right directions squeeze at the inlet and outlet positions of the valve body. When continuously applying pressure, the two moving plates 43 gradually push the valve body to the central position in the left and right directions of the placing plate 2 until the pressing block 41 penetrates through the through hole 431 and extends into the inside of the inlet and outlet of the valve body. And the other ends of several pressing rods 51 move inside the positioning box 5. When the pressure sensor detects that the pressure value reaches the set value range, at this time the valve seat is positioned at the central position on the top of the placing plate 2. At this time, the power supply is turned on, and the electrorheological fluid temporarily fixes the positions of the pressing rods 51 and the baffle 53 inside the positioning box 5. At this time, the valve body is firmly fixed on the placing plate 2. The stability of the valve body after positioning is high, greatly reducing the assembly error, and further reducing the finished product loss. After the assembly is completed, disconnecting the power supply can make the electrorheological fluid turn into a liquid state, and the components inside the positioning box 5 can move.

[0047] Embodiment 3, as Figure 8As shown, the pressing block 41 has a frustum-shaped structure. The maximum bottom diameter of the pressing block 41 is smaller than the diameter of the through hole 431, and the center points of the pressing block 41 and the through hole 431 are on the same horizontal line. A ventilation duct with the same shape as the pressing block 41 is provided at the center position of the pressing block 41. An air intake port 411 that communicates with the inner channel of the pressing block 41 is provided on the outer surface of the fixing plate 4 for connecting the blowing pipe of the blower. During the process of the cleaning mechanism positioning the valve body left and right, the pressing block 41 gradually extends into the channel of the valve body until the inlet or outlet of the valve body is completely blocked. The pressing block 41 is made of rubber and has a certain ductility, which can seal the inlet and outlet of the valve body. The ventilation duct of the pressing block 41 becomes narrower from the outside to the inside, so that the wind speed at the air outlet gradually increases. Then, the blower is turned on to ventilate the valve body inward along the inlet and outlet respectively, and the impurities in the channel of the valve body can be blown out of the body. The cleaning process of the channel of the valve body is completed after the positioning of the valve body is completed and before the insertion and assembly of the valve core, providing guarantee for the subsequent smooth assembly of the valve core and the use of the stop valve.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated assembly workstation for a globe valve, 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), and a rotating module is installed on the pressure module. Two mounting platforms (14) are provided at the top of the workbench (1), and loading and unloading modules are installed on both of the two mounting platforms (14), characterized in that: At the top of the workbench (1), there are two parallel slide rails (12). A same sliding table (121) is connected to the two slide rails (12). A support base (122) is installed at the top of the sliding table (121). At the top of the support base (122), a placing plate (2) for placing the valve body is fixedly connected. At the top of the placing plate (2), four equally spaced pushing mechanisms are installed. The four pushing mechanisms are symmetrically arranged in pairs and distributed in the front, back, left, and right directions. Positioning mechanisms are provided on the two pushing mechanisms distributed in the front and back directions for positioning the valve seat in the front and back directions. Cleaning mechanisms are provided on the two pushing mechanisms distributed in the left and right directions for positioning the valve seat in the left and right directions and cleaning the inside of the channel. Each of the pushing mechanisms includes a base (3) fixedly connected to the edge of the top of the placing plate (2). Inside the base (3), a cylinder three (31) is horizontally installed. The output end of the cylinder three (31) faces the center of the placing plate (2) and is connected to a push plate. The positioning mechanism includes a positioning box (5) fixedly connected to the push plate. The inside of the positioning box (5) is hollow and filled with electrorheological fluid. A number of pressing rods (51) are movably embedded and connected inside the positioning box (5). At one end of the pressing rod (51) located outside the positioning box (5), a head with a diameter larger than its own diameter is fixedly connected. A second spring (52) is sleeved on the outer surface of the pressing rod (51). The two ends of the second spring (52) are respectively fixed between the outer wall of the positioning box (5) and the head. A power supply interface is provided on the outer surface of the positioning box (5) for external power connection. A copper sheet is connected between the power supply interface and the electrorheological fluid filled inside the positioning box (5) to make the electrorheological fluid electrically connected to the power supply. At the other end of the pressing rod (51) located inside the positioning box (5), a cylindrical baffle (53) is fixedly connected to prevent this end of the pressing rod (51) from moving out of the positioning box (5). The diameter of the baffle (53) is larger than the diameter of the pressing rod (51). Sealing gaskets are provided on the inner wall of the positioning box (5) at the insertion edges of each pressing rod (51) to prevent the electrorheological fluid filled in the cavity from leaking out. The cleaning mechanism includes a fixing plate (4) fixedly connected to the push plate. A pressing block (41) is fixedly connected to the outer surface of the fixing plate (4). Two rows of round holes are opened on the fixing plate (4) on both sides of the pressing block (41). The number of round holes in each row is several. A connecting rod (42) movably penetrates through each round hole. At one end of the connecting rod (42) away from the pressing block (41), a moving plate (43) is fixedly connected. A through hole (431) for the pressing block (41) to movably penetrate is opened on the moving plate (43). A first spring (432) is sleeved on the outer surface of the connecting rod (42). The two ends of the first spring (432) are respectively fixedly connected to the fixing plate (4) and the moving plate (43).

2. The automated assembly workstation for a globe valve according to claim 1, characterized in that: The pressing block (41) has a frustum-shaped structure. The maximum bottom diameter of the pressing block (41) is smaller than the diameter of the through hole (431), and the center points of the pressing block (41) and the through hole (431) are on the same horizontal line. A ventilation duct with the same shape as the pressing block (41) is provided at the central position of the pressing block (41). An air inlet (411) that communicates with the inner channel of the pressing block (41) is provided on the outer surface of the fixing plate (4) for connecting the air blowing pipe of the air blower.

3. The automatic assembly workstation for a globe valve according to claim 1, characterized in that: The pressure module includes a hydraulic press (111) installed at the top of the beam frame (11). The output end of the hydraulic press (111) penetrates downward to the lower part of the hydraulic press (111). The rotation module includes an extension platform (112) vertically installed at the bottom end of the output end of the hydraulic press (111). A servo motor (113) is installed on the top of the extension platform (112). The output end of the servo motor (113) movably penetrates to the lower part 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 evenly distributed at equal intervals at the bottom end of the disc. The loading and unloading module includes an automated manipulator device installed at the top of the installation table (14).

4. An automated assembly workstation for a globe valve according to claim 1, characterized in that: The workbench (1) is divided into upper and lower surfaces. A cylinder two (13) is installed between the upper surface and the lower surface through a bracket. The bottom end of the bracket is slidably connected to the lower surface. The output end of the cylinder two (13) movably penetrates upward to the top of the bracket and is connected to a limiting plate (131). A "U"-shaped notch is provided on the upper surface of the workbench (1) between the two slide rails (12). A cylinder one (123) is also installed on the upper surface of the workbench (1) behind the notch. The output end of the cylinder one (123) is connected to the rear surface of the slide table (121). The width of the limiting plate (131) is greater than the width of the notch, so that the moving range of the limiting plate (131) is limited to the area between the bracket and the upper surface of the workbench (1).

5. An automated assembly workstation for a globe valve according to claim 4, characterized in that: A vertical upward ejector rod (132) is fixedly connected to the central position at the top end of the limiting plate (131). A placement groove (21) that penetrates up and down is provided at the central position of the placement disc (2). The top end of the ejector rod (132) is fixedly connected to a carrier plate (211) that is movably located inside the placement groove (21). Four limiting grooves (22) are also provided on the placement disc (2), and the four limiting grooves (22) are respectively located below the four pushing mechanisms.

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