Automatic assembly equipment for ball valves

Abstract

The present invention provides an automatic assembly device for ball valves, belonging to the technical field of valve assembly equipment. The present invention includes an assembly operation device and a circulating transmission device on which a movable assembly platform is provided; the assembly operation device includes a heat fitting station, a flange liner sealing ring assembly station, a leaf spring spacer ring assembly station, a valve seat assembly station, a valve seat sealing ring assembly station, a ball center assembly station, a flange valve body assembly station, a packing assembly station, a valve stem assembly station, an upper platform assembly station, a packing gland assembly station, and a bolt assembly station. The present invention simplifies the traditional cumbersome and complex assembly process into an automated assembly line, which has the characteristics of high precision, convenience, simplicity, efficiency, cost saving, time saving, and labor saving, and realizes the rapid and accurate assembly of ceramic ball valves, while effectively preventing problems such as bumps and cracks on ceramic parts.

Description

Technical Field

[0001] The present invention relates to the technical field of valve assembly equipment, in particular to automatic assembly equipment for ball valves. Background Art

[0002] Ceramic ball valves are currently widely used in various industries, primarily in fixed and floating ball configurations. Compared to traditional metal ball valves, ceramic ball valves require a ceramic core, seat, and liner, all made of ceramic. This requires a complex assembly process and high precision. Furthermore, ceramic is brittle, making it prone to collisions and cracking during assembly and transportation. Addressing these complex assembly processes and high precision requirements, while also preventing these issues, has become a pressing technical challenge. Summary of the Invention

[0003] In view of this, in order to solve the shortcomings of the prior art, the present invention provides an automatic assembly equipment for ball valves, which refines the ceramic ball valve assembly process, decomposes the complex assembly process into relatively simple assembly steps, and then completes it on a designated assembly table; the assembly table is provided with various positioning tooling, which can effectively prevent problems such as collapse and cracks caused by collisions between parts during transportation.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An automatic ball valve assembly device comprises an assembly operation device on which a movable assembly platform is provided and a circulating transmission device;

[0006] The mobile assembly platform moves cyclically along with the cyclic transmission device and enters the subsequent assembly stations in sequence;

[0007] The assembly operation device comprises:

[0008] The hot-fitting station is used to heat the flange and valve body, take them out and place them on the mobile assembly table for tightening and positioning, and install the ceramic flange lining and the ceramic valve body lining into the flange and valve body, and then transport them along the assembly line to the flange lining sealing ring assembly station;

[0009] The flange liner sealing ring assembly station is used to install the sealing ring into the flange liner sealing ring groove and then transport it along the assembly line to the leaf spring spacer ring assembly station;

[0010] The leaf spring spacer assembly station is used to install the leaf spring spacer into the flange cavity and then transport it to the valve seat assembly station along the assembly line;

[0011] The valve seat assembly station presses the valve seat into the flange, and after the valve seat assembly is completed, it is transported along the assembly line to the valve seat sealing ring assembly station;

[0012] The valve seat sealing ring assembly station installs the sealing ring into the valve seat sealing ring groove and then transports it to the ball center assembly station along the assembly line;

[0013] The ball center assembly station is used to place the ceramic ball center in the center of the valve seat and then transport it along the assembly line to the flange valve body assembly station;

[0014] The flange valve body assembly station is used to fasten the flange and valve body at the shrink fitting station and then transport them along the assembly line to the packing assembly station and the valve stem assembly station;

[0015] The packing assembly station and the valve stem assembly station are used to assemble the packing into the packing cavity of the valve body and insert the valve stem into the packing respectively. After assembly, they are transported along the assembly line to the upper platform assembly station;

[0016] The upper platform assembly station is used to install and fix the upper platform on the valve body. After assembly, it is transported along the production line to the packing gland assembly station and the bolt assembly station;

[0017] The packing gland assembly station and the bolt assembly station are used to assemble the packing gland and the packing gland fixing bolts to the valve respectively. After assembly, they are transported along the assembly line to the auxiliary inspection station.

[0018] Preferably, the mobile assembly platform comprises:

[0019] an elastic pre-tightening device, which is provided on the base of the mobile assembly table and is used for clamping the workpiece;

[0020] The spring cavity is used to adjust the elastic preload force. It has a built-in spring element to provide elastic preload force for the workpiece. The specifications of the spring element in the spring cavity can be flexibly replaced according to the workpieces of different calibers.

[0021] Positioning tooling is used to perform positioning operations on the tooling through positioning pins and positioning surfaces according to the positioning reference requirements of the workpiece.

[0022] Preferably, the heat fitting station includes:

[0023] An electromagnetic heating box, used for heating the flange and the valve body;

[0024] The electromagnetic heating control system is used to control the temperature inside the electromagnetic heating box.

[0025] Preferably, the valve seat assembly station includes:

[0026] A transverse guide rail, which is provided on the frame of the valve seat assembly station;

[0027] a valve seat assembly device, which is slidably connected to the transverse guide rail;

[0028] The valve seat assembly pressing block is arranged on the valve seat assembly device and presses the valve seat into the flange under the drive of the valve seat assembly device to complete the valve seat assembly.

[0029] Preferably, the valve seat sealing ring assembly station includes:

[0030] The grease injection device is used to inject grease into the valve seat sealing ring groove.

[0031] Preferably, the filler assembly station includes:

[0032] The valve body clamping fixture and the valve body clamping block are used together to clamp the valve body;

[0033] a packing installation device, used for assembling the packing into the packing cavity of the valve body;

[0034] Packing compression block, used to compress the packing;

[0035] The valve stem assembly station includes:

[0036] a valve stem installation device for inserting the valve stem into the packing;

[0037] The propulsion device is used to propel the valve stem to a specified position.

[0038] Preferably, the filler assembly station further comprises:

[0039] The position sensor B is used to accurately control the compression amount of the filler when the filler installation device is assembled.

[0040] Preferably, the valve stem assembly station further comprises:

[0041] The valve stem installation device position sensor is used to determine the position of the valve stem inserted into the packing.

[0042] Preferably, the valve stem assembly station further comprises:

[0043] a transverse guide rail provided on the frame of the valve stem assembly station;

[0044] Guide column for valve stem mounting device;

[0045] The valve stem installation device is slidably connected to the transverse guide rail and the valve stem installation device guide column respectively, and slides along the extension direction of the transverse guide rail and the valve stem installation device guide column respectively.

[0046] Preferably, it also includes:

[0047] Auxiliary inspection station, used for manual auxiliary inspection.

[0048] With respect to the prior art, the present invention has the following technical effects:

[0049] The present invention simplifies the traditional cumbersome and complicated assembly process into an automated assembly line, which has the characteristics of high precision, convenience, speed, simplicity and efficiency, cost saving, time and labor saving, etc., and realizes the rapid and accurate assembly of ceramic ball valves, while effectively preventing problems such as bumps and cracks on ceramic parts.

[0050] In the present invention, the ceramic ball valve assembly process is refined, and the complex assembly process is broken down into relatively simple assembly steps, which are then completed on a designated assembly table; the assembly table is provided with various positioning tooling to achieve accurate positioning of the workpiece, which can effectively prevent problems such as chipping and cracks caused by collisions between parts during transportation using traditional processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A top view of the present invention;

[0052] Figure 2 It is the front view of the present invention;

[0053] Figure 3 This is a schematic diagram of the structure of the flange liner sealing ring assembly station and the leaf spring spacer ring assembly station;

[0054] Figure 4 This is a structural diagram of the valve seat assembly station and grease injection device;

[0055] Figure 5 This is a schematic diagram of the track transmission and control position;

[0056] Figure 6 This is a structural diagram of the flange liner sealing ring assembly station;

[0057] Figure 7 It is a structural diagram of the packing assembly station and the valve stem assembly station;

[0058] Figure 8 It is a structural diagram of the mobile assembly platform;

[0059] Figure 9 This is an axonometric view of the present invention;

[0060] Figure 10 This is a diagram of the protective installation framework of the present invention;

[0061] In the figure, 1. Assembly operation device; 2. Heat fitting station; 3. Flange liner seal ring assembly station; 4. Leaf spring spacer assembly station; 5. Valve seat assembly station; 6. Valve seat seal ring assembly station; 7. Ball center assembly station; 8. Flange valve body assembly station; 9. Packing assembly station; 10. Valve stem assembly station; 11. Upper platform assembly station; 12. Packing gland assembly station; 13. Bolt assembly station; 14. Auxiliary inspection station; 15. Rotary manipulator; 16. Electromagnetic heating box; 17. Electromagnetic heating control system System; 18. Sliding guide rail; 19. Sliding manipulator; 20. Leaf spring spacer mounting manipulator; 21. Elastic preload device A; 22. Elastic preload device B; 23. Spring cavity; 24. Positioning fixture; 25. Preloaded inclined push rod; 26. Sliding bottom block; 27. Three-phase asynchronous motor; 28. Clamping device; 29. ​​Clamping device sliding block; 30. Sealing ring mounting manipulator; 31. Grease injection device; 32. Grease injection pressure regulating device; 33. Positioning sensor; 34. Grease injection device height adjustment track; 35 , automatic height adjustment device; 36, valve seat assembly device; 37, valve seat assembly device transverse guide rail; 38, valve seat assembly pressure block; 39, sealing ring assembly robot; 40, robot force controller; 41, track height adjustment device; 42, circulating transmission device; 43, transmission device control system; 44, equipment operation display; 45, air circuit control system; 46, tensioning conveyor belt; 47, transverse slide rail; 48, tensioning conveyor belt drive device; 49, slide rail position sensor block; slide rail position sensor block; 50 , driving device slider; 51, valve stem mounting device guide column; 52, valve stem mounting device transverse guide rail; 53, valve stem mounting device position sensor; 54, propulsion device; 55, valve stem tightening device; 56, valve stem mounting device clamping block; 57, valve body clamping tool; 58, position sensor A; 59, valve body clamping block; 60, position sensor B; 61, packing mounting device; 62, packing clamping block; 63, transmission device bracket; 64, transmission track; 65, track width adjustment device; 66, device moving wheel. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0064] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0065] like Figure 1-10 As shown, the present invention provides a ball valve automatic assembly device, comprising an assembly operation device 1 on which a movable assembly table is provided and a circulating transmission device 42;

[0066] The mobile assembly platform moves cyclically along with the cyclic transmission device 42 and enters the subsequent assembly stations in sequence;

[0067] The assembly operation device 1 includes:

[0068] The hot-fitting station 2 is used to heat the flange and valve body, take them out and place them on the mobile assembly table for tightening and positioning, and install the ceramic flange lining and the ceramic valve body lining into the flange and valve body, and then transport them along the assembly line to the flange lining seal assembly station 3;

[0069] The flange liner sealing ring assembly station 3 is used to install the sealing ring into the flange liner sealing ring groove and then transport it along the assembly line to the leaf spring spacer ring assembly station 4;

[0070] Leaf spring spacer assembly station 4 is used to install the leaf spring spacer into the flange cavity and then transport it to the valve seat assembly station 5 along the assembly line;

[0071] The valve seat assembly station 5 presses the valve seat into the flange, and after the valve seat assembly is completed, it is transported along the assembly line to the valve seat sealing ring assembly station 6;

[0072] The valve seat sealing ring assembly station 6 installs the sealing ring into the valve seat sealing ring groove and then transports it along the assembly line to the ball center assembly station 7;

[0073] The ball center assembly station 7 is used to place the ceramic ball center in the center of the valve seat and then transport it along the assembly line to the flange valve body assembly station 8;

[0074] The flange valve body assembly station 8 is used to fasten the flange and valve body in the shrink fitting station 2 and then transport them along the assembly line to the packing assembly station 9 and the valve stem assembly station 10;

[0075] The packing assembly station 9 and the valve stem assembly station 10 are used to assemble the packing into the packing cavity of the valve body and insert the valve stem into the packing, respectively. After assembly, they are transported along the assembly line to the upper platform assembly station 11;

[0076] The upper platform assembly station 11 is used to install the upper platform on the valve body and fix it. After assembly, it is transported along the assembly line to the packing gland assembly station 12 and the bolt assembly station 13;

[0077] The packing gland assembly station 12 and the bolt assembly station 13 are used to assemble the packing gland and the packing gland fixing bolts onto the valve respectively. After assembly, they are transported to the auxiliary inspection station 14 along the assembly line.

[0078] The present invention simplifies the traditional cumbersome and complicated assembly process into an automated assembly line, which has the characteristics of high precision, convenience, speed, simplicity and efficiency, cost saving, time and labor saving, etc., and realizes the rapid and accurate assembly of ceramic ball valves, while effectively preventing problems such as bumps and cracks on ceramic parts.

[0079] In the present invention, the circulating transmission device 42 comprises a three-phase asynchronous motor 27, a transmission control system 43, an air circuit control system 45, a transmission bracket 63, a track height adjustment device 41, a transmission track 64, a track width adjustment device 65, and a positioning sensor 33. The three-phase asynchronous motor 27 is an AC motor that generates a rotating magnetic field using a three-phase power supply to drive the rotor. In this control system, it serves as a power source for driving mechanical components. The three-phase asynchronous motor 27 is connected to the transmission control system 43, which controls the motor's starting, stopping, speed, and direction.

[0080] The transmission control system 43, consisting of an electrical control cabinet, a frequency converter, and a PLC (Programmable Logic Controller), is used to precisely control the motor's operating state, including speed, acceleration, and position. It receives signals from the positioning sensor 33 and adjusts the motor's operation accordingly. It also controls the air control system 45 and other actuators.

[0081] The air control system 45 includes pneumatic valves, cylinders, air compressors, etc., which are used to drive mechanical components through compressed air to achieve actions such as clamping and pushing. It is controlled by the transmission device control system 43 to achieve precise action execution.

[0082] The transmission device bracket 63 is a structure that supports the transmission device and is made of aluminum alloy to ensure the stability and accuracy of the transmission device.

[0083] The track height adjustment device 41 is used to adjust the vertical position of the transmission track 64 to adapt to different work requirements or compensate for uneven ground. It is controlled by the transmission device control system 43 to achieve automatic adjustment of height.

[0084] The transmission track 64 is the path for the valve body to move and is adjustable. It is the infrastructure of the entire transmission system, through which the motor and transmission device transmit power.

[0085] Track width adjusting device 65 is used for adjusting the width of transmission track 64, to adapt to valve bodies of different sizes. It is controlled by transmission device control system 43, to realize automatic adjustment of width.

[0086] The positioning sensor 33 is used to detect the position of the object or vehicle and feed this information back to the control system. Its feedback information is the basis for the transmission control system 43 to make decisions.

[0087] The equipment operation display 44 is used to display various equipment operation parameters, assembly progress, air pressure, etc.

[0088] The water circulation operation is achieved through the three-phase asynchronous motor 27, the transmission device control system 43, and the air path control system 45. At the same time, the track width and height can be freely adjusted through the track height adjustment device 41 and the track width adjustment device 65. At the same time, the installation platform can be accurately positioned through the positioning sensing device 33 to meet the needs of free assembly of valves of various sizes.

[0089] In the present invention, the mobile assembly platform includes:

[0090] An elastic pre-tightening device is provided on the base of the mobile assembly platform and is used for clamping the workpiece. The elastic pre-tightening device is preferably an elastic pre-tightening device A21 and an elastic pre-tightening device B22, which are respectively located at both ends of the mobile assembly platform and can rotate around a fixed axis. They have a self-reset function. When in use, the elastic pre-tightening device A21 and the elastic pre-tightening device B22 are respectively rotated backward to place the parts to be fixed. The elastic pre-tightening device rebounds and then clamps the workpiece.

[0091] The spring cavity 23 is used to adjust the elastic preload force. The built-in spring element provides elastic preload force for the workpiece. The specifications of the spring element in the spring cavity 23 can be flexibly replaced according to the workpieces of different calibers.

[0092] Positioning fixture 24 is used to position the fixture according to the workpiece's positioning reference requirements using locating pins and locating surfaces. Positioning fixture 24 is equipped with locating pins that engage bolt holes in the workpiece flange to prevent the workpiece from rotating during assembly. The locating pins can be adjusted to accommodate flanges of varying diameters.

[0093] The positioning fixture 24 is provided with a positioning pin, which is used in conjunction with the bolt hole on the workpiece flange to prevent the workpiece from rotating during assembly. The specifications of the positioning pin can be adjusted according to flanges of different sizes and diameters.

[0094] The mobile assembly station preferably also includes:

[0095] The pre-tightening inclined push rod 25 is used to adjust the force direction of the elastic pre-tightening device. It is connected to the elastic pre-tightening device through a buckle positioning pin, and its direction can be freely adjusted.

[0096] The sliding bottom block 26 is used to adjust the relative spacing and position of the elastic preload device A21 and the elastic preload device B22. A long hole is provided on the bottom block, and the elastic preload device can adjust its position along the long hole, so that the mobile assembly table can be suitable for workpieces of various calibers.

[0097] In the present invention, the heat fitting station 2 includes:

[0098] An electromagnetic heating box 16, used for heating the flange and the valve body;

[0099] An electromagnetic heating control system 17 is used to control the temperature inside the electromagnetic heating box 16;

[0100] Preferably, the flange, valve body and other parts that need to be hot-fitted are placed in the electromagnetic heating box 16 through the rotary manipulator 15, and the electromagnetic heating control system 17 controls the temperature of the electromagnetic heating box 16 to maintain within the preset temperature range. After the insulation time is reached, it is taken out from the electromagnetic heating box 16 and placed on the mobile assembly table. It is tightened and positioned through the elastic preload device A21 and the elastic preload device B22 on the mobile assembly table. The rotary manipulator 15 installs the ceramic flange lining, valve body lining, etc. into the flange and valve body. After the temperature drops, the ceramic parts and the metal parts are interference fit together to form a complete whole.

[0101] The heat-matched parts are transported along the assembly line to the flange liner seal ring assembly station 3, wherein the flange liner seal ring assembly station 3 preferably includes:

[0102] The tightening device 28 is used to accurately position the workpiece. The tightening device 28 extends forward to press the workpiece and cooperates with the elastic pre-tightening device to assist in positioning.

[0103] The tightening device sliding block 29 is used to adjust the position and pre-tightening force of the tightening device 28 to achieve universal use;

[0104] The sealing ring installation manipulator 30 is used to install the required sealing ring into the sealing ring groove of the flange liner.

[0105] The pressing device sliding block 29 is installed on the frame of the flange lining sealing ring assembly station 3, and the pressing device 28 is slidably connected to the pressing device. The sealing ring installation manipulator 30 is also installed on the frame of the flange lining sealing ring assembly station 3.

[0106] After the flange is fitted with the flange liner and the sealing ring is installed, it is transported along the assembly line to the leaf spring spacer assembly station 4. This station is equipped with a leaf spring spacer installation robot 20. The sliding robot 19 on the robot is pneumatically driven and is mounted on a sliding guide rail 18. It can move freely along the guide rail to install the leaf spring spacer into the flange cavity. After installation, it is transported along the assembly line to the valve seat assembly station 5.

[0107] In the present invention, the valve seat assembly station 5 includes:

[0108] A transverse guide rail, which is provided on the frame of the valve seat assembly station 5;

[0109] a valve seat assembly device 36 slidably connected to the transverse guide rail;

[0110] The valve seat assembly pressing block 38 is provided on the valve seat assembly device 36 and is driven by the valve seat assembly device 36 to press the valve seat into the flange to complete the valve seat assembly.

[0111] The valve seat assembly device 36 can move freely along the valve seat assembly device transverse guide rail 37. After the robot places the valve seat on the flange, the assembly table tooling completes the valve seat positioning work. The valve seat assembly clamping block 38 presses the valve seat into the flange, completing the valve seat assembly. At the same time, the clamping force can be adjusted by the system to meet the assembly requirements of valve seats of different calibers. After the valve seat assembly is completed, the subsequent valve seat seal ring assembly station 6 is transferred to this station. This station is equipped with a seal ring assembly robot 39. The robot installs the seal ring into the valve seat seal ring groove. The installation force can be automatically controlled by the robot force controller 40 to meet the assembly requirements of valve seat seal rings of different calibers.

[0112] In the present invention, the valve seat sealing ring assembly station 6 further includes:

[0113] The grease injection device 31 is used to inject grease into the valve seat sealing ring groove.

[0114] The grease injection device 31 includes several grease guns filled with various types of sealing ring-specific grease with different temperature resistances. The grease injection device 31 is located on a height adjustment track 34. The track is equipped with an automatic height adjustment device 35 for adjusting the height of the grease injection device 31 to achieve horizontal and vertical movement requirements. The device also has a positioning sensor 33 for precise positioning, strictly controlling the distance between the grease gun and the sealing ring as required to meet the grease injection requirements of valve seats of different calibers. The device also has a grease pressure adjustment device 32, which can adjust the grease injection pressure to prevent it from being too high or too low. After grease injection, it is transported along the assembly line to the ball center assembly station 7.

[0115] At the ball center assembly station 7, the flange is positioned using the assembly table's built-in elastic preload device A21, elastic preload device B22, spring cavity 23, positioning fixture 24, preload angled push rod 25, and sliding bottom block 26 to ensure it is centered on the assembly table. Specifically, the elastic preload device A21 and elastic preload device B22 clamp the flange from both ends, while the positioning fixture 24 assists in positioning by using the bolt holes on the flange to prevent rotation during assembly. The preload angled push rod 25 adjusts the direction of force applied by the preload device. Manual operation is assisted to place the ceramic ball center in the center of the valve seat, and the ball center valve stem hole is kept horizontal to facilitate subsequent installation of the valve body and valve stem.

[0116] After assembly, it is transported along the assembly line to the flange valve body assembly station 8. At the flange valve body assembly station 8, a valve body loading robot is provided. Through the positioning tool 24, the flange mounting hole and the valve body mounting hole are accurately aligned. At the same time, the elastic preload device A21 and the elastic preload device B22 clamp the flange to prevent the flange from shifting during the installation process. After the flange valve body is installed, the nut is tightened by the auxiliary station.

[0117] After assembly, it is transported along the assembly line to the packing assembly station 9 and the valve stem assembly station 10. In the present invention, the packing assembly station 9 includes:

[0118] The valve body tightening tool 57 and the valve body clamping block 59 cooperate with each other, and use the tooling to determine the position of the valve body and clamp the valve body.

[0119] A packing installation device 61 is used to install the packing into the packing cavity of the valve body;

[0120] A packing pressing block 62 is used to compress the packing;

[0121] Preferably, a position sensor B60 is further included to accurately control the compression amount of the packing when the packing installation device 61 is assembled. The position sensor B60 accurately controls the compression amount of the packing to ensure sealing while preventing the packing from being compressed too much to affect the valve torque.

[0122] The valve stem assembly station 10 includes:

[0123] a valve stem installation device for inserting the valve stem into the packing;

[0124] A propulsion device 54 is used to propel the valve stem to a specified position;

[0125] The valve stem tightening device 55 is used to fix the position of the valve stem to prevent the valve stem from being displaced during the assembly process.

[0126] Preferably, a valve stem installation device position sensor 53 is further included to determine the position of the valve stem inserted into the packing.

[0127] In the present invention, the valve stem assembly station 10 further includes:

[0128] a transverse guide rail, which is provided on the frame of the valve stem assembly station 10;

[0129] Valve stem mounting device guide column 51;

[0130] The valve stem mounting device is slidably connected to the transverse guide rail and the valve stem mounting device guide column 51 respectively, and slides along the extending directions of the transverse guide rail and the valve stem mounting device guide column 51 respectively.

[0131] The valve stem mounting device is located on the valve stem mounting device guide column 51 and the valve stem mounting device transverse guide rail 52. When the valve stem mounting device is in operation, it can move up and down according to the valve stem mounting device guide column 51. A position sensor A58 can also be provided to sense the position of the valve stem mounting device. The surface of the valve stem mounting device guide column 51 is welded with alloy and polished to ensure sufficient wear resistance. At the same time, it can also move left and right according to the valve stem mounting device transverse guide rail 52. The device is provided with a valve stem mounting device position sensor 53, which can accurately locate the positional relationship between the mounting device and the valve body according to assembly requirements. The valve stem mounting device has its own manipulator to insert the valve stem into the packing. The propulsion device 54 is activated, and the valve stem mounting device clamping block 56 pushes the valve stem to the specified position. The valve stem mounting device position sensor 53 is responsible for determining the positional relationship of the valve stem inserted into the valve body to prevent the valve stem from extending too deep and hitting the center of the ball, causing valve leakage.

[0132] After assembly, it is transported along the assembly line to the upper platform assembly station 11. There, the assembly table is equipped with an elastic preload device A21, an elastic preload device B22, a spring cavity 23, a positioning fixture 24, a preload angled push rod 25, a sliding bottom block 26, and other devices that work together to position the assembled valve components. Specifically, the elastic preload device A21 and the elastic preload device B22 clamp the valve body from two directions. The positioning fixture 24 assists in positioning through the flange bolt holes to prevent displacement and rotation of the valve body. The preload angled push rod device adjusts the direction of force applied by the elastic preload device, and the sliding bottom block 26 adjusts the workpiece position for easy installation. The robot installs the upper platform onto the valve body and tightens the screws to secure it.

[0133] After assembly, it is transported along the assembly line to the packing gland assembly station 12 and the bolt assembly station 13. At the packing gland assembly station 12 and the bolt assembly station 13, the fixed manipulator and the rotary manipulator 15 cooperate to install the packing gland and the packing gland fixing bolts on the valve, and assist the manual station to assemble the packing gland and tighten the bolts.

[0134] After assembly, it is transported along the assembly line to the auxiliary inspection station 14, which is set at the end of the conveying device. In the present invention, the auxiliary inspection station 14 is used for manual auxiliary inspection, including auxiliary inspection of valve appearance, assembly accuracy, sealing, etc. After completion, it is taken off the line to complete the valve assembly.

[0135] In the present invention, a transverse slide rail 47 is provided, and a tensioning conveyor belt 46 and a tensioning conveyor belt driving device 48 are synchronously provided, which are used to transfer the movable assembly table from one side of the assembly line to the other side. The tensioning force can be adjusted by the tensioning conveyor belt 46 to prevent the movable assembly table from slipping during the transportation process; the tensioning conveyor belt driving device 48 is connected to the driving device slider slide rail position sensing block 50 through a mechanical connection, and the driving device slider slide rail position sensing block 50 can be moved along the setting direction and meet the use requirements of valves of different sizes by adjusting the position; a slide rail position sensing block 49 is provided at the transverse slide rail 47 for sensing the slide rail position and making timely adjustments when problems such as slide rail displacement and looseness occur.

[0136] In the present invention, the entire set of equipment is located on a movable frame and is provided with device moving wheels 66 and positioning support devices. The entire equipment can be freely moved according to the factory conditions, which is convenient and fast, without the need for positioning devices such as anchor bolts, and is easy to move and transport.

[0137] The above are only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A ball valve automatic assembly equipment, characterized in that, It includes an assembly operation device on which a mobile assembly platform is provided and a circulating transmission device; The mobile assembly platform moves cyclically along with the cyclic transmission device and enters the subsequent assembly stations in sequence; The assembly operation device comprises: The hot-fitting station is used to heat the flange and valve body, take them out and place them on the mobile assembly table for clamping and positioning, and install the ceramic flange lining and the ceramic valve body lining into the flange and valve body, and then transport them along the assembly line to the flange lining sealing ring assembly station; The flange liner sealing ring assembly station is used to install the sealing ring into the flange liner sealing ring groove and then transport it along the assembly line to the leaf spring spacer ring assembly station; The leaf spring spacer assembly station is used to install the leaf spring spacer into the flange cavity and then transport it to the valve seat assembly station along the assembly line; The valve seat assembly station presses the valve seat into the flange, and after the valve seat assembly is completed, it is transported along the assembly line to the valve seat sealing ring assembly station; The valve seat sealing ring assembly station installs the sealing ring into the valve seat sealing ring groove and then transports it to the ball center assembly station along the assembly line; The ball center assembly station is used to place the ceramic ball center in the center of the valve seat and then transport it along the assembly line to the flange valve body assembly station; The flange valve body assembly station is used to transport the flange and valve body in the shrink fitting station to the packing assembly station and the valve stem assembly station along the production line after they are fastened. The packing assembly station and the valve stem assembly station are used to assemble the packing into the packing cavity of the valve body and insert the valve stem into the packing respectively. After assembly, they are transported along the assembly line to the upper platform assembly station; The upper platform assembly station is used to install and fix the upper platform on the valve body. After assembly, it is transported along the production line to the packing gland assembly station and the bolt assembly station; The packing gland assembly station and the bolt assembly station are used to assemble the packing gland and the packing gland fixing bolts to the valve respectively. After assembly, they are transported along the assembly line to the auxiliary inspection station; The filler assembly station includes: The valve body clamping fixture and the valve body clamping block are used together to clamp the valve body; a packing installation device, used for assembling the packing into the packing cavity of the valve body; Packing compression block, used to compress the packing; The valve stem assembly station includes: a valve stem installation device for inserting the valve stem into the packing; A propulsion device, used to propel the valve stem to a specified position; The valve stem assembly station also includes: a transverse guide rail provided on the frame of the valve stem assembly station; Guide column for valve stem mounting device; The valve stem installation device is slidably connected to the transverse guide rail and the valve stem installation device guide column respectively, and slides along the extension direction of the transverse guide rail and the valve stem installation device guide column respectively.

2. The ball valve automatic assembly equipment according to claim 1, characterized in that: The mobile assembly platform comprises: an elastic pre-tightening device, which is provided on the base of the mobile assembly table and is used for clamping the workpiece; The spring cavity has a built-in spring element to provide elastic preload for the workpiece. The spring element specifications in the spring cavity can be flexibly changed according to the workpieces of different calibers. Positioning tooling is used to perform positioning operations on the tooling through positioning pins and positioning surfaces according to the positioning reference requirements of the workpiece.

3. The ball valve automatic assembly equipment according to claim 1, characterized in that: The thermal fitting station includes: An electromagnetic heating box, used for heating the flange and the valve body; The electromagnetic heating control system is used to control the temperature inside the electromagnetic heating box.

4. The ball valve automatic assembly equipment according to claim 1, characterized in that: The valve seat assembly station includes: A transverse guide rail, which is provided on the frame of the valve seat assembly station; a valve seat assembly device, which is slidably connected to the transverse guide rail; The valve seat assembly pressing block is arranged on the valve seat assembly device and presses the valve seat into the flange under the drive of the valve seat assembly device to complete the valve seat assembly.

5. The ball valve automatic assembly equipment according to claim 1, characterized in that: The valve seat sealing ring assembly station includes: The grease injection device is used to inject grease into the valve seat sealing ring groove.

6. The ball valve automatic assembly equipment according to claim 1, characterized in that: The filler assembly station also includes: The position sensor B is used to accurately control the compression amount of the filler when the filler installation device is assembled.

7. The ball valve automatic assembly equipment according to claim 1, characterized in that: The valve stem assembly station also includes: The valve stem installation device position sensor is used to determine the position of the valve stem inserted into the packing.

8. The ball valve automatic assembly equipment according to any one of claims 1 to 7, characterized in that: Also includes: Auxiliary inspection station, used for manual auxiliary inspection.

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