A gate valve processing and assembly production line

Abstract

The present invention provides a gate valve processing and assembly production line. According to the composition of the gate valve, the assembly of the gate valve is divided into two independent valve body processing lines and valve cover processing lines. According to the processing procedures of the valve body, a valve body feeding area, a welding area, a grinding area, a chip removal area and a valve body pump inspection area are sequentially arranged, and each process is connected in series through a first transport line body. The valve body passes through the first transport line body in sequence through required processes for step-by-step processing and then enters the general assembly area. According to the assembly procedure of the valve cover, a valve cover feeding area, an assembly area and a valve cover pump inspection area are sequentially arranged, and each process is connected in series through a second transport line body. The valve cover passes through the second transport line body in sequence through required processes for step-by-step assembly and then enters the general assembly area. Then, the valve body and valve cover that have passed the inspection are assembled together to complete the assembly line assembly of the gate valve, avoid disconnection between the processes, detect quality problems in time, and improve work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of valve equipment, and in particular relates to a gate valve processing and assembly production line. Background Art

[0002] Valves are control components in fluid delivery systems. Wedge gate valves are a type of valve that are widely used in oil and steam pipelines in petrochemicals, thermal power plants, etc. as opening and closing devices to connect or cut off the medium in the pipeline.

[0003] The gate valve, also called the gate valve, refers to a valve whose closing part (gate) moves in the vertical direction along the axis of the channel. It is mainly used to cut off the medium in the pipeline, that is, it is used fully open or fully closed. Its closing principle is that the gate sealing surface and the valve seat sealing surface are highly smooth, flat and consistent, fit each other, and can prevent the medium from flowing through. Generally, gate valves have two sealing pairs, which adds some difficulties to processing, grinding and maintenance. The gate valve is sealed by contact between the valve seat and the gate, and the sealing surface is usually welded with metal materials to increase wear resistance.

[0004] For a long time, valve manufacturing has adopted an accumulation-type batch production method, that is, all the parts of the gate valve are produced and processed separately in large quantities, stored separately, and then according to the number of gate valves to be assembled, the parts are picked up from the inventory on demand for testing and assembly. Due to the different structures of the components and the different production and processing efficiencies, the production volume of different components in the same time will be inconsistent. The disconnection between the processing and assembly processes will cause a large number of products to become inventory waiting to be transported, resulting in overproduction and imbalance in the production and assembly process. The stacking of a large number of products makes it difficult to find quality problems in time, which will affect production efficiency. The traditional production method is seriously backward and cannot meet the needs of modern industrial development. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is that the various processes in the traditional gate valve processing and assembly production method are disconnected, resulting in product accumulation, overproduction and process imbalance, affecting production efficiency and production quality.

[0006] To this end, the present invention provides a gate valve processing and assembly production line, comprising

[0007] The first transport line body and the second transport line body are suitable for carrying the valve body and valve cover to be processed;

[0008] A valve body processing line is arranged along the first transport line; the valve body processing line is provided with the following processing areas in sequence, including: a valve body feeding area, a welding area, a grinding area, a chip removal area and a valve body pump testing area;

[0009] A valve cover processing line is arranged along the second transport line; the valve cover processing line is provided with the following processing areas in sequence, including: a valve cover feeding area, an assembly area and a valve cover pump testing area;

[0010] The final assembly area is arranged between the valve body pump testing area and the valve cover pump testing area, and is suitable for assembling the processed valve body and valve cover together; the end of the first transport line body and the end of the second transport line body are both located in the final assembly area.

[0011] The valve body processing line also includes: a marking area, which is arranged between the valve body feeding area and the welding area; and a marking machine is arranged in the marking area.

[0012] A loading and unloading device is arranged between each of the processing areas.

[0013] The loading and unloading device comprises a truss manipulator and a lifting and transplanting machine.

[0014] The first transport line body and the second transport line body respectively include a horizontal conveying device and a suspended accumulation chain vehicle group.

[0015] The horizontal conveying device is a double-layer circulating conveying chain.

[0016] The suspension accumulation chain vehicle group is arranged between the chip removal area and the valve body pump test area;

[0017] The suspension accumulation chain vehicle group is arranged between the valve cover pump testing area and the final assembly area.

[0018] The valve body seat ring welding equipment is arranged in the welding area, including:

[0019] Rotating platform;

[0020] The electric positioner is arranged in a straight line and rotatably arranged on the rotating platform;

[0021] A pneumatic rotating disk is installed on the electric positioner and connected to the middle flange of the valve body to drive the valve body to rotate;

[0022] The welding gun has an initial position away from the valve body and a working position entering the interior of the valve body, wherein the working position corresponds to the position of the seat ring in the valve body.

[0023] There are two pneumatic rotating disks, which are arranged at two ends of the electric positioner, and the axes of the two pneumatic rotating disks coincide with the axis of the electric positioner.

[0024] The valve body seat ring welding equipment also includes a positioning tool, which is used to place the seat ring against the seat ring hole, and the positioning tool includes:

[0025] ontology;

[0026] A process gate, connected to the lower part of the body, having two inclined surfaces symmetrically inclined relative to the vertical plane of the body;

[0027] a power device, disposed on the body, for driving the fixing device to move radially; and

[0028] A fixing device is fixed on the main body and is used to position the positioning tool at a preset position in the valve body during radial movement.

[0029] The grinding area includes a grinding area and a lapping area; the lapping area is equipped with lapping equipment, including:

[0030] frame,;

[0031] At least one grinding workbench, on which a fixture is arranged, the fixture is used for mounting and positioning the object to be ground, and the grinding workbench is provided with a through hole;

[0032] A grinding disc, suitable for conveying into the inner cavity of the object to be ground;

[0033] A rotating spindle is movably arranged on the frame, and the rotating spindle has a first working position and a standby position, wherein the standby position is a position where the rotating spindle is below the grinding worktable, and the first working position is a position where the rotating spindle passes upward through the through hole and extends into the inner cavity to install or remove the grinding disc;

[0034] An automatic grinding disc installation mechanism, arranged at the upper end of the rotating spindle, for installing or removing the grinding disc when the rotating spindle is in the first working position;

[0035] A rotary drive mechanism, used for driving the rotary spindle to rotate and grind;

[0036] The lifting drive mechanism is used to drive the rotating spindle to move along a preset trajectory, wherein the preset trajectory is: the rotating spindle rises from the standby position to the first working position, moves to the grinding area for grinding after the grinding disc is installed; after the grinding area is finished, returns to the first working position to disassemble the grinding disc and returns to the standby position;

[0037] The control system is used to communicate with the rotating drive mechanism, the lifting drive mechanism and the grinding disc automatic installation mechanism.

[0038] The frame is provided with a longitudinal guide rail;

[0039] The bottom of the grinding workbench is slidably connected to the longitudinal guide rail, so that the grinding workbench moves along the longitudinal guide rail until the rotating spindle is aligned with the through hole.

[0040] There are two grinding workbenches, which are arranged in parallel along the longitudinal guide rail. Two loading and unloading positions are formed on both sides of the position where the rotating spindle is located. When one of the grinding workbenches is in its corresponding loading and unloading position, the other grinding workbench moves to a position where the rotating spindle is aligned with the through hole.

[0041] The grinding disc automatic installation mechanism comprises a tightening sleeve arranged at the upper end of the rotating main shaft; and a pull rod arranged in the rotating main shaft and movable up and down, and the tightening sleeve is pulled by the pull rod to tighten or loosen the grinding disc.

[0042] The chip removal area includes a cleaning station, a rinsing station and a drying station in sequence.

[0043] The valve body pump inspection area is provided with valve body inspection equipment, including:

[0044] A testing workbench is arranged on the base;

[0045] A detection device is arranged on the detection workbench; it has a detection cavity;

[0046] A process valve stem is axially perpendicular to the detection workbench and is slidably disposed in the detection cavity; the front end of the process valve stem is suitable for fixing the gate to be detected;

[0047] A first driving assembly, slidably disposed between the base and the detection workbench;

[0048] Driven by the first driving assembly, the detection cavity is adapted to communicate with the middle cavity of the valve body to be detected, and the opening end surface of the detection cavity is sealed against the opening of the middle cavity of the valve body to be detected;

[0049] The process valve stem is suitable for moving toward the inner part of the middle cavity of the valve body to be tested and abutting the gate plate to be tested against the sealing surface of the seat ring of the valve body to be tested;

[0050] The detection cavity is suitable for letting detection fluid flow into it.

[0051] The detection device comprises:

[0052] A fixed plate, fixed to the detection workbench; at least two fluid channels communicating with the outside are provided on the fixed plate;

[0053] A blind plate is sealingly arranged on the fixed plate; the detection cavity is opened on the blind plate, the process valve stem is slidingly arranged on the fixed plate and the front end is located in the detection cavity;

[0054] Any of the fluid channels is connected to the detection chamber.

[0055] The valve body detection device also includes:

[0056] A fixing seat is installed at the front end of the process valve stem; a left-right symmetrical fixing part is arranged on the fixing seat; any one of the fixing parts is suitable for fixing the gate plate to be detected.

[0057] The valve body detection device also includes at least two limit assemblies;

[0058] Any of the limiter components comprises:

[0059] A third driver is mounted on the detection workbench;

[0060] A limiting portion, fixed to the driving end of the third driver; under the driving of the third driver, the limiting portion is suitable for moving along the extending direction of the process valve stem;

[0061] The limiting portion is suitable for pressing and limiting the opening of the middle cavity of the valve body to be detected.

[0062] The limiting components are symmetrically arranged on both sides of the process valve stem.

[0063] Also includes:

[0064] At least one fourth driving assembly is adapted to drive any of the limit assemblies to move in a direction perpendicular to the extension of the process valve stem.

[0065] The technical solution of the present invention has the following advantages:

[0066] 1. The present invention provides a gate valve processing and assembly production line, which divides the assembly of the gate valve into two independent valve body processing lines and valve cover processing lines according to the composition of the gate valve; according to the processing procedures of the valve body, a valve body loading area, a welding area, a grinding area, a chip removal area and a valve body pump inspection area are sequentially arranged, and the various procedures are connected in series through a first transport line body, and the valve body passes through the first transport line body in sequence through the required procedures for step-by-step processing and then enters the general assembly area; according to the assembly procedure of the valve cover, a valve cover loading area, an assembly area and a valve cover pump inspection area are sequentially arranged, and the various procedures are connected in series through a second transport line body, and the valve cover passes through the second transport line body in sequence through the required procedures for step-by-step assembly and then enters the general assembly area, and then the valve body and valve cover that have passed the inspection are assembled together to complete the assembly line assembly of the gate valve, thereby avoiding disconnection between the various procedures, being able to discover quality problems in a timely manner, and improving work efficiency.

[0067] 2. The present invention provides a gate valve processing and assembly production line. During the use of the valve body seat ring welding equipment, first, the two seat rings of the valve body are fixed on the corresponding seat ring holes through a fixing device, and then the middle flange of the valve body is fixed on the pneumatic rotating disk, and the welding gun is inserted into the seat ring position. After welding is completed, the welding gun is withdrawn to the initial position, and the pneumatic rotating disk turns around and faces the unprocessed end flange towards the welding gun. At this time, the welding gun is started again and moves to the working position to weld the seat ring on the other side.

[0068] The valve body seat ring welding device provided by the present invention can realize welding of the seat rings on both sides by clamping the valve body only once, with a high degree of automation and good symmetry of the two seat rings of the valve body.

[0069] 3. In the gate valve processing and assembly production line provided by the present invention, the axes of the two pneumatic rotating disks coincide with the axis of the electric positioner. Since the axes coincide, after welding the seat ring inside the first valve body, the electric positioner can be directly rotated 180°, so that the unprocessed valve body can be directly facing the welding gun without any adjustment of the position of the welding gun.

[0070] 4. A gate valve processing and assembly production line provided by the present invention also includes a positioning tool. During actual use, the positioning tool is first placed inside the valve body so that the symmetrically arranged inclined surfaces of the process gate plate can be stably attached to the seat ring. Then an external force is applied to the power device, and the fixing device positions the positioning tool on the guide rail rib inside the valve body under the action of the power device.

[0071] Through the process gate, the positioning tool can be installed once to complete the operation of welding the seat rings on both sides. Compared with the prior art, which requires clamping both sides and welding the seat rings separately, the positioning tool provided by the present invention has higher work efficiency. At the same time, because the two inclined surfaces of the process gate are symmetrical to each other, it avoids the low positioning accuracy of the valve body caused by two clamping in the prior art, which causes the operator to manually fine-tune the position of the welding gun during the welding process, resulting in a low degree of automation and affecting the welding quality of the two seat rings of the valve body.

[0072] 5. The present invention provides a gate valve processing and assembly production line, in which the standby position of the rotating spindle of the grinding equipment is under the workbench. When working, it passes through the workbench from bottom to top to the first position to install the grinding disc, and moves downward to grind the workpiece. The arrangement of the rotating spindle under the workbench, on the one hand, shortens the stroke of the rotating spindle and does not occupy the upper space of the workbench, thereby facilitating the loading and unloading of the workpiece and avoiding the influence of the driving component located above the workbench surface on the layout of the workpiece loading and unloading robot on the workbench; on the other hand, the rotating spindle is pulled from top to bottom for grinding, which exerts a downward pulling force on the grinding head, reducing the risk of bending of the grinding shaft due to large force, and simplifying the structure of the driving end.

[0073] 6. The gate valve processing and assembly production line provided by the present invention has a double-station setting for grinding equipment that can realize automatic exchange control. The cylinder is used as the power to make the worktable slide along the linear guide rail, so that one station can perform grinding processing and the other station can perform loading and unloading and workpiece flipping. The workpiece is loaded and unloaded by a robot, and the workpiece is flipped. The action sequence can be linked with the machine tool and logistics transmission equipment to achieve linkage control.

[0074] 7. The present invention provides a gate valve processing and assembly production line, in which valve body inspection equipment is arranged in the valve body pump inspection area, and an inspection device is arranged on a workbench, wherein an inspection cavity is provided on the inspection device, and a process valve stem is slidably inserted into the inspection cavity, and a gate plate to be inspected is fixed at the front end of the process valve stem. The workbench, driven by a first driving component, drives the inspection cavity and the process valve stem to move toward the valve body to be inspected, so that the inspection cavity is connected with the middle cavity of the valve body to be inspected, and a sealing arrangement is arranged at the connection, and the process valve stem drives the gate plate to continue to move toward the inside of the middle cavity of the valve body to be inspected, so that the gate plate to be inspected abuts against the seat ring sealing surface of the valve body to be inspected, and a detection fluid is injected into the inspection cavity to detect the sealing performance of the gate plate to be inspected and the valve body to be inspected, and when a sealing problem occurs, the gate plate to be inspected or the seat ring sealing surface can be repaired in time, and when there is no sealing problem, the group of gate plates and the valve body can be transported together to the next process for assembly, so as to avoid disassembling the valve body for repair when a sealing problem occurs after the assembly is completed, thereby improving the yield rate of the valve body assembly and reducing the repair cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0076] Figure 1 It is a structural schematic diagram of the gate valve processing and assembly production line of the present invention;

[0077] Figure 2 It is a flow chart of the gate valve processing and assembly production line of the present invention;

[0078] Figure 3 It is a schematic diagram of the structure of the gate valve body;

[0079] Figure 4 It is a structural schematic diagram of the valve body seat ring welding equipment in the gate valve processing and assembly production line of the present invention;

[0080] Figure 5 It is a structural schematic diagram of a fixing device in a valve body seat ring welding device;

[0081] Figure 6 It is a schematic diagram of the structure of the power device of the positioning tool in the valve body seat ring welding equipment;

[0082] Figure 7 It is a structural schematic diagram of the positioning tooling in the valve body seat ring welding equipment;

[0083] Figure 8 It is a front view of the grinding equipment in the gate valve processing and assembly production line of the present invention;

[0084] Fig. 9 It is a cross-sectional view of a grinding device in a gate valve processing and assembly production line of the present invention;

[0085] Fig.10 A top view of a grinding device in a gate valve processing and assembly production line of the present invention;

[0086] Fig.11 The structure of the valve body detection equipment in the gate valve processing and assembly production line of the present invention is shown in FIG. Figure 1 ;

[0087] Fig.12 The structure of the valve body detection equipment in the gate valve processing and assembly production line of the present invention is shown in FIG. Figure 2 ;

[0088] Fig.13 It is a partial enlarged schematic diagram of the workbench in the valve body inspection equipment;

[0089] Fig.14 Schematic diagram of the valve body detection process in the gate valve processing and assembly production line of the present invention Figure 1 ;

[0090] Fig.15 Schematic diagram of the valve body detection process in the gate valve processing and assembly production line of the present invention Figure 2 ;

[0091] Fig.16 Schematic diagram of the valve body detection process in the gate valve processing and assembly production line of the present invention Figure 3 .

[0092] Description of reference numerals:

[0093] 1-first speed chain; 2-second speed chain; 3-valve body loading area; 4-marking area; 5-welding area; 6-grinding area; 61-grinding area; 62-flushing area; 63-grinding area; 7-chip removal area; 71-cleaning station; 72-rinsing station; 73-drying station; 8-valve body pump inspection area; 9-valve cover loading area; 10-assembly area; 11-valve cover pump inspection area; 12-general assembly area; 13-suspension accumulation chain vehicle group; 14-third speed chain;

[0094] 100-end flange; 200-seat ring; 300-guide rib; 400-middle flange; 4a-body; 41a-vertical cavity; 42a-horizontal cavity; 5a-bump; 51a-matching inclined surface; 52a-step; 6a-process gate; 61a-inclined surface; 7a-power device; 71a-rotating shaft; 711a-inclined surface; 72a-connecting shaft; 9a-guide groove; 10a-locating pin; 11a-welding gun; 12a-pneumatic rotating disk; 13a-electric positioner;

[0095] 1b-frame; 2b-grinding workbench; 3b-grinding disc manipulator assembly; 4b-grinding disc; 5b-clamp; 6b-object to be ground; 7b-expansion sleeve; 8b-rotating spindle; 9b-pull rod; 11b-longitudinal guide rail; 31b-bracket; 32b-cylinder; 33b-transverse guide rail; 34b-grinding disc manipulator;

[0096] 10c-base; 30c-controller; 11c-connecting plate; 12c-gate to be tested; 1c-testing workbench; 2c-testing device; 21c-fixing plate; 211c-fluid channel; 22c-blind plate; 221c-testing chamber; 3c-process valve stem; 31c-fixing seat; 4c-first driving assembly; 41c-first driver; 42c-support frame; 5c-first guide assembly; 51c-first guide rail; 52c-first slider; 6c-second driver; 7c-limiting assembly; 71c-third driver; 72c-limiting part; 8c-fourth driving assembly; 81c-driving disk; 82c-connecting rod; 9c-second guide assembly; 91c-second guide rail; 92c-second slider. DETAILED DESCRIPTION

[0097] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0098] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0099] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] Example 1

[0101] This embodiment provides a gate valve processing and assembly production line, such as Figure 1 As shown, it includes a first transport line body and a second transport line body, which are suitable for carrying gate valve bodies and valve covers to be processed (not shown in the figure), and the first transport line body and the second transport line body respectively include a horizontal conveying device and a suspended accumulation chain vehicle group 13. The horizontal conveying device is a double-layer circulating conveying chain. In this embodiment, the circulating conveying chain adopts a double-speed chain. Any transport line body adopts a combination of a double-speed chain and a tooling pallet (conventional pallet, not shown in the figure). The double-speed chain is a conventional double-layer circulating reflux form, on which a tooling pallet is placed. The tooling pallet is suitable for placing a valve body or a valve cover. When the tooling pallet carries the valve body or the valve cover to the end of the transport line body, the valve body or the valve cover is removed, and the tooling pallet is refluxed with the double-speed chain to the loading area of ​​the valve body or the valve cover for recycling.

[0102] like Figure 1As shown, the valve body processing line is arranged along the first transport line, and the following processing areas are arranged in sequence on the valve body processing line: valve body feeding area 3, welding area 5, grinding area 6, chip removal area 7 and valve body pump test area 8. In this embodiment, a marking area 4 is also arranged between the valve body feeding area 3 and the welding area 5, and a marking machine is arranged in the marking area 4. The marking machine is a conventional equipment. When the valve body is transferred to the marking station with the first speed chain 1, the marking machine automatically prints the serial number on the valve body. In this embodiment, the grinding area 6 includes a grinding area 61, a flushing area 62 and a grinding area 63 which are arranged in sequence. The grinding area 61 is used for the rough grinding of the valve body after welding. Conventional grinding tools are used. After the rough grinding, the iron filings and welding slags remaining in the grinding process are removed by the flushing area 62, and then the valve body sealing surface is finely ground after entering the grinding area 63. In this embodiment, the chip removal area 7 includes a cleaning station 71 (i.e., water washing), a rinsing station 72, and a drying station 73, which are arranged in sequence to remove impurities such as iron filings remaining after grinding, and then enter the valve body pump inspection area 8 to detect the sealing of the valve body and the gate plate. The valve body that passes the inspection continues to flow along the first transport line to the final assembly area.

[0103] like Figure 1 As shown, the valve cover processing line is arranged along the second conveyor line body, and the following processing areas are arranged in sequence on the valve cover processing line: valve cover loading area 9, assembly area 10 and valve cover pump inspection area 11. The valve cover flows to the final assembly area 12 along the second speed chain 2 of the second conveyor line body, and the final assembly area 12 is arranged between the valve body pump inspection area 8 and the valve cover pump inspection area 11. The ends of the first conveyor line body and the second conveyor line body are located in the final assembly area 12, and they intersect at one point in the final assembly area 12, so that the valve body and valve cover that have passed the inspection flow together for assembly.

[0104] In this embodiment, in order to make full use of the space in the workshop and facilitate the movement and work of operators, the valve body processing line and the valve cover processing line are adaptively distributed according to their lengths, such as Figure 1 As shown, the valve body processing line is arranged in an L-shaped right angle from the valve body loading area 3 at the starting end of the first transport line to the drying station 73. The valve cover processing line and the valve body pump inspection area 8 in the valve body processing line are arranged in a corresponding L-shaped right angle, wherein the valve cover processing line is located on one right angle side, and the valve body pump inspection area 8 is located on the other right angle side, and a staff movement channel is set between the two L-shaped lines. The starting end of the general assembly area 12 is located at the right angle vertex where the valve cover processing line and the valve body pump inspection area 8 intersect. In this embodiment, a third transport line is also provided. The third transport line is a horizontal conveying device, which adopts a single-layer circulating tooling reflux form, that is, Figure 1As shown, a circle of third-speed chain 14 is arranged around the valve body pumping area 8, and the circulation route of the third-speed chain 14 is a closed rectangle. In this embodiment, since the circulation direction of the first transport line body in the valve body pumping area 8 is consistent with the circulation direction of the third transport line body in the valve body pumping area 8 when the third transport line body circulates, therefore, in this embodiment, the first transport line body located in the valve body pumping area 8 is directly replaced by the third transport line body, as shown in FIG. Figure 1 As shown, in the final assembly area 12, the gate valve with the valve body and the valve cover assembled is transferred to the side of the pump test area 8 facing away from the valve body through the third speed chain 14. The third speed chain 14 runs intermittently to facilitate the screwing of the stud nuts and the installation of the handwheel. Of course, the screwing of fasteners such as the stud nuts and the installation of the handwheel can also be carried out directly in the final assembly area 12. After all is completed, the finished gate valve is transferred out through the third speed chain 14, and the finished gate valve is removed by manual or mechanical means.

[0105] In this embodiment, in order to facilitate the circulation of the tooling pallet on the line, a hanging accumulation chain vehicle group 13 is set between the chip removal area 7 and the valve body pump inspection area 8 of the valve body processing line. Figure 1 As shown, after the valve body leaves the grinding area 63, it is hung on the suspension accumulation chain car group 13 through a hook, and the empty tooling pallet flows from the lower layer of the first speed chain 1 to the valve body loading area 3 for recycling. The valve body continues to perform subsequent processing steps with the suspension accumulation chain car group 13, and enters the valve body pump inspection area 8 after being cleaned, rinsed and dried in sequence. The suspension accumulation chain car group 13 is also set in the valve cover processing line in the valve cover pump inspection area 11. After the valve cover passes the previous assembly area 10, it is hung on the suspension accumulation chain car group 13 through a hook, and the empty tooling pallet flows from the lower layer of the second speed chain 2 to the valve cover loading area 9 for recycling. The valve cover continues to move with the suspension accumulation chain car group 13 into the valve cover pump inspection area 11, and after passing the inspection, it is transferred to the final assembly area 12 through the suspension accumulation chain car group 13.

[0106] Depending on specific needs, loading and unloading devices (not shown in the figure) are set between each process in the valve body processing line and the valve cover processing line, including truss manipulators and jacking transplanters, etc., to facilitate the transfer of the valve body or valve cover from the conveyor line body to each processing area, and put the valve body or valve cover back on the conveyor line body for continued circulation after the processing is completed. In this embodiment, according to the changes in the clamping position and the processing and installation position, the truss manipulator can edit different clamping and moving programs. The truss manipulator and the jacking transplanter are both conventional equipment, and the specific structure and working principle will not be repeated.

[0107] The valve body seat ring welding equipment is arranged in the welding area 5, such as Figure 4 As shown, the electric positioner 13a is arranged in a "I" shape and is rotatably arranged on a rotating platform. The pneumatic rotating disk 12a is installed on the electric positioner 13a and connected to the middle flange 400 of the valve body to drive the valve body to rotate; Figure 3The welding gun 11a has an initial position away from the valve body and a working position entering the valve body, and the working position corresponds to the position of the seat ring 200 in the valve body.

[0108] During use, first pass Figure 5 The fixing device shown fixes the two seat rings 200 of the valve body on the corresponding seat ring holes, and then fixes the middle flange 400 of the valve body on the pneumatic rotating disk 12a, and the welding gun 11a is inserted into the position of the seat ring 200. After welding is completed, the welding gun 11a withdraws to the initial position, and the pneumatic rotating disk 12a turns around to turn the unprocessed end flange 100 toward the welding gun 11a. At this time, the welding gun 11a is started again and moves to the working position to weld the seat ring 200 on the other side.

[0109] The valve body seat ring welding device provided by the present invention can realize welding of the seat rings 200 on both sides by clamping the valve body only once, with a high degree of automation, and the two seat rings 200 of the valve body have good symmetry.

[0110] In this embodiment, there are two pneumatic rotating disks 12a, which are arranged at both ends of the electric positioner 13a, and the axes of the two pneumatic rotating disks 12a coincide with the axis of the electric positioner 13a.

[0111] Specifically, the two valve bodies are arranged horizontally. Since the axes coincide, after welding the seat ring 200 inside the first valve body, the electric positioner 13a is directly rotated 180 degrees, and the unprocessed valve body can be directly facing the welding gun 11a without any adjustment of the position of the welding gun 11a.

[0112] The present embodiment also includes a positioning tool, which is used to place the seat ring 200 against the seat ring hole, and the positioning tool includes: a main body 4a; a process gate plate 6a, which is connected to the bottom of the main body 4a and has two inclined surfaces 61a symmetrically inclined relative to the vertical plane of the main body 4a; a power device 7a, which is arranged on the main body 4a and is used to drive the fixing device to move radially; and a fixing device, which is fixed on the main body 4a and is used to position the positioning tool at a preset position in the valve body during the radial movement.

[0113] During actual use, the positioning tool is first placed inside the valve body so that the symmetrically arranged inclined surface 61a of the process gate 6a can be stably abutted against the seat ring 200, and then an external force is applied to the power device 7a. Under the action of the power device 7a, the fixing device positions the positioning tool on the guide rail rib 300 in the valve body.

[0114] Through the process gate 6a, the positioning tool can be installed once to complete the operation of welding the seat rings 200 on both sides. Compared with the prior art, which requires clamping both sides and welding the seat rings 200 separately, the positioning tool provided by the present invention has higher working efficiency. At the same time, because the two inclined surfaces 61a of the process gate 6a are symmetrical to each other, it avoids the low positioning accuracy of the valve body caused by two clamping in the prior art, which causes the operator to manually fine-tune the position of the welding gun 11a during the welding process, resulting in a low degree of automation and affecting the welding quality of the two seat rings 200 of the valve body.

[0115] Specifically, the process gate plate 6a is connected to the lower part of the body 4a through a shaft, and the process gate plate 6a has an inclined surface 61a on the left and right sides respectively.

[0116] In this embodiment, Figure 5 As shown, the fixing device includes a protrusion 5a, which is arranged in pairs through the side wall of the main body 4a and protrudes on the side of the main body 4a. An opening groove is arranged on the protrusion 5a, and the openings of the two opening grooves are arranged radially opposite to each other. The two opening grooves are used to cooperate with the axially extending and radially protruding guide ribs 300 arranged on the side wall of the valve body cavity.

[0117] After the positioning tool is placed inside the valve body, the power device 7a is started to make the protrusion 5a protrude and press the guide rail rib 300 to prevent the positioning tool from falling off from the inside of the valve body.

[0118] In this embodiment, Figure 6 As shown, the power device 7a includes a connecting shaft 72a, which is fixed on the main body 4a, extends along the axial direction of the main body 4a, and has an external thread formed on its outer wall; a rotating shaft 71a, which is sleeved on the connecting shaft 72a, and has an internal thread formed on its inner wall that matches the external thread, and the outer wall of the shaft where the internal thread is formed is an inclined surface 711a that gradually inclines inward from top to bottom; a matching inclined surface 51a, which is arranged on the protrusion 5a and matches with the inclined surface 711a.

[0119] External force acts on the rotating shaft 71a, causing the rotating shaft 71a to move downward. Since an inclined surface 711a is formed at the bottom end of the rotating shaft 71a, and a matching inclined surface 51a is formed on the protrusion 5a, the vertical movement of the rotating shaft 71a can be converted into horizontal movement of the protrusion 5a through the cooperation of the inclined surface 61a, so that the protrusion 5a protrudes from the main body 4a.

[0120] In this embodiment, Figure 7 As shown, the body 4a has a vertical cavity 41a inside, the connecting shaft 72a passes through the vertical cavity 41a and is fixed on the body 4a. The body 4a has a horizontal cavity 42a extending radially outward relative to the vertical cavity 41a, and the projection 5a passes through the horizontal cavity 42a and penetrates the side wall of the body 4a.

[0121] A guide groove 9 a is formed between the two inclined surfaces 61 a of the process gate plate 6 a , and the guide groove 9 a is used to cooperate with the guide rail rib 300 .

[0122] The body 4a further includes a positioning pin 10a. A step 52a is formed at a portion of the protrusion 5a corresponding to the positioning pin 10a. The bottom end of the positioning pin 10a is arranged in front of the movement path of the step 52a and forms a gap with the step 52a when the protrusion 5a does not move.

[0123] The step 52a can prevent the protrusion 5a from excessively moving under the drive of the connecting shaft 72a, causing the protrusion 5a to fall out of the body 4a.

[0124] This embodiment provides a valve body seat ring welding method, comprising the following steps:

[0125] Place two seat rings 200 against the seat ring holes inside the valve body;

[0126] Aim the welding gun 11a at the opening of the flange 100 on one side of the valve body, and extend the welding gun 11a into the interior of the valve body from the flange 100 on one side of the valve body to weld the seat ring 200 on one side of the seat ring hole to the seat ring hole;

[0127] Reset the welding gun 11a;

[0128] The valve body is rotated 180° so that the welding gun 11a is aimed at the opening of the end flange 100 on the other side of the valve body, and extends into the interior of the valve body from the end flange 100 on this side to weld the seat ring 200 on the seat ring hole on this side.

[0129] In this embodiment, the valve body is mounted on the pneumatic rotating disk 12a via the flange 400, and the valve body is turned around and rotated 180° by rotating the pneumatic rotating disk 12a.

[0130] Specifically, two pneumatic rotating disks 12a are used, and the two pneumatic rotating disks 12a are arranged on both ends of the electric positioner 13a. The axes of the two pneumatic rotating disks 12a coincide with the axis of the electric positioner 13a. Through the electric positioner 13a, the symmetrical processing technology of the two valve bodies can be realized.

[0131] Grinding equipment is provided in the grinding area 63, such as Figures 8 to 10 As shown, it includes: a rack 1b;

[0132] At least one grinding workbench 2b, on which a fixture 5b is arranged, the fixture 5b is used for mounting and positioning the object to be ground 6b, and the grinding workbench 2b is provided with a through hole;

[0133] The grinding disc 4b is suitable for being conveyed into the inner cavity of the object to be ground 6b;

[0134] The rotating spindle 8b is movably arranged on the frame 1b, and the rotating spindle 8b has a first working position and a standby position, wherein the standby position is a position where the rotating spindle 8b is below the grinding worktable 2b, and the first working position is a position where the rotating spindle 8b passes upward through the through hole and extends into the inner cavity to install or remove the grinding disc 4b;

[0135] An automatic grinding disc installation mechanism, arranged at the upper end of the rotating spindle 8b, for installing or removing the grinding disc 4b when the rotating spindle 8b is in the first working position;

[0136] A rotary drive mechanism, used for driving the rotary spindle 8b to rotate and grind;

[0137] A lifting drive mechanism is used to drive the rotating spindle 8b to move along a preset trajectory, wherein the preset trajectory is: the rotating spindle 8b rises from the standby position to the first working position, and moves to the grinding area for grinding after the grinding disc 4b is installed;

[0138] After the grinding area is ground, return to the first working position, disassemble the grinding disc 4b, and return to the standby position;

[0139] The control system is used to communicate with the rotating drive mechanism, the lifting drive mechanism and the grinding disc automatic installation mechanism.

[0140] The grinding equipment provided in this embodiment is particularly suitable for grinding the sealing surface of the valve body. Furthermore, it can be used for grinding the sealing surface of the valve body of a wedge-type gate valve. The standby position of its rotating spindle is below the workbench. When working, it passes through the workbench from bottom to top to the first position to install the grinding disc, and moves downward to grind the object to be ground 6b. The arrangement of the rotating spindle under the workbench, on the one hand, shortens the stroke of the rotating spindle and does not occupy the upper space of the workbench, thereby facilitating the loading and unloading of the workpiece, and avoiding the influence of the driving component located above the workbench on the layout of the workpiece loading and unloading manipulator on the workbench; on the other hand, the rotating spindle is pulled from top to bottom for grinding, and it has a downward pulling force on the grinding head, which reduces the risk of bending of the grinding shaft due to large force, and simplifies the structure of the driving end.

[0141] In the above-mentioned grinding equipment, a longitudinal guide rail 11b is provided on the frame 1b; the bottom of the grinding workbench 2b is slidably connected to the longitudinal guide rail 11b, so that the grinding workbench 2b moves along the longitudinal guide rail 11b until the rotating spindle is aligned with the through hole. Preferably, the workbench can be adjusted in angle on the horizontal plane, and the inclination angle can be fine-tuned by ±1°; it can also include functions such as adjusting angle detection function and locking.

[0142] There are two grinding workbenches 2b, which are arranged in parallel along the longitudinal guide rail 11b. Two loading and unloading positions are formed on both sides of the position where the rotating spindle is located. When one of the grinding workbenches 2b is in its corresponding loading and unloading position, the other grinding workbenches 2b moves to the position where the rotating spindle is aligned with the through hole. The double-station setting can realize automatic exchange control. The cylinder is used as the power to make the workbench slide along the linear guide rail to realize grinding processing at one station and loading and unloading and workpiece flipping at the other station; and the workpiece loading and unloading adopts a manipulator to load and unload the workpiece, flip the workpiece, etc., and its action sequence can realize linkage control with the machine tool and logistics transmission equipment.

[0143] In the above-mentioned grinding equipment, the automatic installation mechanism of the grinding disc includes a clamping sleeve 7b arranged at the upper end of the rotating main shaft 8b; and a pull rod 9b arranged in the rotating main shaft 8b and movable up and down, and the clamping sleeve 7b is pulled by the pull rod to tighten or loosen the grinding disc 4b.

[0144] The above-mentioned grinding equipment also includes a grinding disc robot assembly 3b for conveying the grinding disc 4b into the inner cavity or taking the grinding disc 4b out of the inner cavity.

[0145] The grinding disc manipulator assembly 3b includes a bracket 31b, which is arranged on one side of the frame 1b; a cylinder 32b and a transverse guide rail 33b, which are arranged on the bracket 31b; a grinding disc manipulator 34b, which is driven by the cylinder 32b and reciprocates along the transverse guide rail 33b, and is used to provide a grinding disc 4b for the rotating spindle 8b or remove the grinding disc 4b from the rotating spindle 8b. The grinding disc automatic installation mechanism cooperates with the grinding disc manipulator assembly 3b to improve the grinding disc installation accuracy and installation efficiency.

[0146] In the above-mentioned grinding equipment, grinding wheel wear compensation can also be performed, which is based on the manually preset grinding wheel wear amount of each workpiece and the maximum processing number of the repaired grinding wheel. After the system automatically calculates, it compensates and adjusts the driving shaft position of the rotating spindle. It also includes a counter for counting the number of reciprocating times of the grinding wheel manipulator. The counter is connected to the control system. If the number counted by the counter reaches the preset value of the control system, the control system controls the alarm device to send an alarm prompt signal. It can control the grinding times of the grinding wheel, and when the set wear value is reached, it can send an alarm signal to prompt the replacement of the grinding wheel.

[0147] The grinding method of the grinding device in this embodiment comprises the following steps:

[0148] Clamping the object to be ground 6b;

[0149] The grinding disc 4b is conveyed into the inner cavity of the object to be ground 6b, and the rotating spindle 8b is driven upward from the standby position through the grinding worktable 2b to the first working position of the inner cavity of the object to be ground 6b, and the grinding disc 4b is installed on the upper end of the rotating spindle 8b;

[0150] Move to the area to be ground for grinding;

[0151] After grinding is completed, the machine returns to the first working position for disassembly, and the rotating spindle 8b descends to the standby position.

[0152] In the above grinding method, the object to be ground 6b is positioned and installed by the fixture 5b, and the installation method is preferably pneumatic clamping; then the grinding table 2b moves to the processing position, and the grinding disc is installed on the grinding disc manipulator, and the grinding disc installation method is manual or automatic; then press the start button, the loading and unloading grinding disc manipulator sends the grinding disc to the position, and the driving shaft quickly raises the rotating spindle, at which time the expansion sleeve of the rotating spindle is in a loose state; after the rotating spindle rises to the position, the pull rod pulls down the inner hole of the expansion grinding disc, and the grinding disc manipulator quickly withdraws to the initial position, and then the spindle cooling system turns on the cooling pump, the spindle rotates at a low speed and moves down, and its rotation speed, speed and displacement are all set by the working program to ensure that the grinding disc has a certain spring pre-pressure after contacting the workpiece to be ground, and then the spindle rotates at a high speed to start grinding. After the grinding time is up, the spindle stops, the coolant is turned off, and the spindle rises to the loading and unloading grinding disc point position. After it stops completely, the grinding disc manipulator quickly enters and grabs the grinding disc, the pull rod is ejected, and it quickly descends, and it is separated from the grinding disc and returns to the initial position. The grinding wheel robot quickly takes the grinding wheel out to its initial position, and the workbench exchanges positions.

[0153] In the grinding method provided in this embodiment, the standby position of the rotating spindle is below the workbench. When working, it passes through the workbench from bottom to top to the first position to install the grinding disc, and moves downward to grind the object to be ground 6b. On the one hand, the stroke of the rotating spindle is shortened, and it does not occupy the upper space of the workbench, which is conducive to loading and unloading of workpieces, and avoids the influence of the driving component located above the workbench on the layout of the workpiece loading and unloading manipulator on the workbench; on the other hand, the rotating spindle is pulled from top to bottom for grinding, which has a downward pulling force on the grinding head, reducing the risk of bending of the grinding shaft due to large force, and simplifying the structure of the driving end.

[0154] Valve body inspection equipment is set in the valve body pump inspection area 8, such as Fig.11As shown, it includes a base 10c, a detection workbench 1c, a detection device 2c, a process valve stem 3c and a first drive assembly 4c. The base 10c of the detection equipment is arranged on one side of the third speed chain 14c for conveying the valve body to be detected. The first drive assembly 4c is installed on the base 10c. The first drive assembly 4c includes a first driver 41c and a support frame 42c. The support frame 42c is vertically installed on the base 10c. The detection workbench 1c is a rectangular flat plate structure, which is extended horizontally and installed on the support frame 42c. The first driver 41c is installed on the top of the support frame 42c, which is suitable for pushing the detection workbench 1c to move up and down in the vertical direction.

[0155] like Fig.12 As shown, a first guide assembly 5c is provided between the detection workbench 1c and the support frame 42c, and the first guide assembly 5c includes at least one first guide rail 51c extending in the vertical direction and provided on the support frame 42c, and at least one first slider 52c slidably provided on the first guide rail 51c. In this embodiment, two first guide rails 51c are provided, distributed on both sides of the support frame 42c, and two first sliders 52c are provided on each first guide rail 51c. A connecting plate 11c is provided between the first slider 52c and the detection workbench 1c, and the connecting plate 11c is a rectangular flat plate structure, as shown in FIG. Fig.12 As shown, the connecting plate 11c and the detection workbench 1c form an L-shaped structure.

[0156] A detection device 2c is arranged on the detection workbench 1c, and the detection device 2c includes a fixing plate 21c and a blind plate 22c. Fig.14 , Fig.15 and Fig.16 As shown in any of the accompanying drawings, the fixed plate 21c is fixed on the lower end surface of the detection workbench 1c, the blind plate 22c is sealed and fixed on the lower end surface of the fixed plate 21c, and a detection cavity 221c is provided on the blind plate 22c. The opening of the detection cavity 221c is located on the lower end surface of the blind plate 22c, that is, the opening end surface of the detection cavity 221c is the lower end surface of the blind plate 22c, and the process valve stem 3c extends in the vertical direction and is slidably penetrated from top to bottom on the fixed plate 21c, and its front end is located in the detection cavity 221c of the blind plate 22c, and at least two fluid channels 211c communicating with the outside are provided on the fixed plate 21c. In this embodiment, two fluid channels 211c are provided. Figures 14 to 16 Only one fluid channel 211c is shown, wherein an exhaust valve (not shown) is provided in one fluid channel 211c, and the other fluid channel 211c is connected to a fluid source of the detection fluid, and the detection fluid is pumped into the detection chamber 221c by a low-pressure pump.

[0157] Driven by the first driver 41c, the open end face of the detection chamber 221c moves downward and abuts against the opening of the middle chamber of the valve body to be detected on the third speed chain below. The opening of the middle chamber of the valve body to be detected is a fixed middle flange 400. The flange surface is sealed against the open end face of the detection chamber 221c. The detection chamber 221c is connected to the middle chamber of the valve body to be detected. The opening size of the detection chamber 221c is equal to or slightly smaller than the opening size of the middle chamber. According to the different specifications of the valve body to be detected and the gate plate 12c to be detected, the blind plate 22c matching them can be replaced, and the specifications of the blind plate 22c can be defined according to the opening size of the detection chamber 221c.

[0158] like Figures 14 to 16 As shown in any of the accompanying drawings, a second driver 6c is arranged on the upper end surface of the detection workbench 1c, and the driving end of the second driver 6c is connected to the process valve stem 3c. The second driver 6c drives the process valve stem 3c to reciprocate in the vertical direction. In this embodiment, the second driver 6c adopts an oil cylinder, and a fixed seat 31c is arranged at the front end of the process valve stem 3c located in the detection chamber 221c. Left-right symmetrical fixing parts are arranged on both sides of the fixed seat 31c, and a gate plate 12c to be detected is fixed on each fixing part. The fixed seat 31c can be of different specifications, that is, according to the different specifications of the gate plate 12c to be detected and the valve body to be detected, the matching fixed seat 31c can be replaced for easy detection.

[0159] like Fig.13 As shown, at least two limit assemblies 7c are also provided on the detection workbench 1c. In this embodiment, two limit assemblies 7c are provided, symmetrically distributed on both sides of the process valve stem 3c. Any limit assembly 7c includes a third driver 71c and a limit portion 72c. The third driver 71c adopts an oil cylinder or an air cylinder. The limit portion 72c is fixed to the driving end of the third driver 71c through a connecting rod. The connecting rod is passed through the detection workbench 1c. The limit portion 72c is located below the detection workbench 1c. Driven by the third driver 71c, the limit portion 72c moves up and down in the vertical direction. The limit portion 72c adopts a hook claw, as shown in FIG. Fig.12 As shown, the hook claw is a trapezoidal structure as a whole, and is suitable for being hooked on the flange 400 at the opening of the valve body to be detected, so as to firmly fix the valve body to be detected and the detection device 2c.

[0160] In this embodiment, a fourth driving assembly 8c is further provided to drive any of the limiting assemblies 7c to move in the horizontal direction, so that the hook claws can clamp the center flange 400. Fig.13As shown, a group of second guide components 9c are respectively arranged on the detection workbench 1c on both sides of the process valve stem 3c, and the second guide components 9c are arranged corresponding to the limit components 7c. Any group of second guide components 9c includes at least one second guide rail 91c, which is arranged in a horizontal direction on the detection workbench 1c, and at least one second slider 92c, which is slidably arranged on the second guide rail 91c. Symmetrical long waist holes (not shown in the figure) are opened on the detection workbench 1c on both sides of the process valve stem 3c. In this embodiment, two second guide rails 91c are arranged in any group of second guide components 9c, and the two second guide rails 91c are symmetrically distributed on both sides of the long waist holes. Both sides of the second slider 92c are respectively slidably arranged in the two second guide rails 91c, and the third driver 71c is fixed on the second slider 92c, and the connecting rod is arranged through the long waist hole.

[0161] The fourth drive assembly 8c includes a fourth driver (not shown), a drive plate 81c and a connecting rod 82c. Fig.13 As shown, the driving disk 81c is coaxially arranged with the process valve stem 3c and rotatably mounted on the detection workbench 1c. The driving end of the fourth driver is hingedly arranged on the driving disk 81c. The fourth driver can be a push rod cylinder, etc., depending on specific needs. The connecting rod 82c is arranged corresponding to the limit assembly 7c. One end of any connecting rod 82c is fixed on the second slider 92c, and the other end is fixed on the driving disk 81c. The two connecting rods 82c are arranged symmetrically about the center of the driving disk 81c. Under the drive of the fourth driver, the limit assemblies 7c on both sides are suitable for synchronous movement.

[0162] A controller 30c is also provided on one side of the third speed chain 14. The controller 30c is electrically connected to the first driver 41c, the second driver 6c, the third driver 71c, the fourth driver, the exhaust valve of the fluid channel, the low-pressure pump (not shown in the figure) for conveying the detection fluid, and the high-pressure pump (not shown in the figure) for maintaining the pressure. The controller 30c also has conventional settings such as an indicator light and a buzzer.

[0163] The working process of gate valve body detection provided in this embodiment is as follows:

[0164] The staff pre-installs the blind plate 22c of appropriate specifications and the fixing seat 31c on the process valve stem 3c according to the specifications of the valve body to be tested and the gate plate 12c to be tested. When the valve body to be tested is transported to the set position below the testing workbench 1c with the third speed chain 14, the two gate plates 12c to be tested are symmetrically installed on the fixing seat 31c, and the preset pump test program is selected (the pump test program sets the pressure value and pressure holding time according to the specifications and pound levels).

[0165] Figures 14 to 16The diagrams illustrate the movement process of the process valve stem 3c driving the gate plate 12c to be inspected. The first driver 41c is turned on by the controller 30c to drive the inspection workbench 1c to move downward until the open end face of the inspection cavity 221c abuts against the middle flange 400 of the valve body to be inspected. Then the second driver 6c is started to push the process valve stem 3c to drive the gate plate 12c to be inspected to continue to move into the middle cavity of the valve body to be inspected. A matching groove is formed between the two gate plates 12c to be inspected. The matching groove moves along the raised guide rib 300 on the inner wall of the middle cavity of the valve body to be inspected, so that the gate plate 12c to be inspected abuts against the sealing surface of the seat ring 200.

[0166] Start the third driver 71c to move the hook downward to below the horizontal plane where the middle flange 400 is located, and then start the fourth driver. The fourth driver pushes the driving disk 81c to rotate, driving the connecting rod 82c. The connecting rod 82c pulls the second slider 92c toward the process valve stem 3c, and at the same time makes the lower hook move horizontally to below the middle flange 400. Start the third driver 71c again to drive the hook to move upward, and the hooks on both sides synchronously limit and hook the valve body to be inspected.

[0167] Then inject the test fluid through the fluid channel to test the leak tightness:

[0168] 1. Low-pressure air sealing test (the test fluid is gas): Inflate the middle cavity through the fluid channel 211c, automatically pressurize to the test pressure, maintain the pressure, and the operator sprays soapy water on the sealing surfaces on both sides to observe whether there are bubbles escaping. After the pressure holding time is reached, the worker presses the pressure relief button to release the pressure of the equipment. Enter the next procedure of high-pressure water sealing test.

[0169] 2. High-pressure water sealing test (the test fluid is liquid): water is filled into the middle cavity through one fluid channel 211c, and the exhaust valve of the other fluid channel 211c is automatically opened until the air is completely exhausted. After the cavity is filled with water, the exhaust valve is closed, the low-pressure water pump stops automatically, and the high-pressure pump is started. When the test medium reaches the pressure value required for the test, the high-pressure pump stops automatically, and the system automatically enters the pressure holding timing state. When the pressure holding timing ends, the pressure holding timing end indicator lights up, and the buzzer sounds to remind you.

[0170] Finally, the pressure is released and the water is drained, and the test is finished. The process valve stem 3c pulls back the gate plate 12c to be tested, releases the hook, moves radially into place, and the testing workbench 1c moves up to the initial position. The pump tester operates the third speed chain 14 to complete the button, and the valve body to be tested and the gate plate 12c to be tested automatically flow to the next process with the tray.

[0171] In this embodiment, the main process flow of the gate valve processing and assembly production line is as follows: Figure 2 As shown, they are:

[0172] Valve body loading - marking - welding - grinding - flushing - grinding - cleaning - rinsing - drying - valve body pump inspection (valve body pump inspection) - assembly;

[0173] Valve cover loading-Valve cover assembly one-Valve cover assembly two-Valve cover pump inspection-Assembly assembly.

[0174] The assembly is common to the valve body and valve cover, and the body and cover are molded together.

[0175] Specifically, the processing and assembly process is:

[0176] Loading of valve body and valve cover: Place the valve body and valve cover on the tooling tray of their respective processing lines;

[0177] After the valve body flows to the marking area 4, the serial number is automatically printed on the valve body by the marking machine;

[0178] In welding area 5, the welding truss manipulator grabs the valve body to the welding workbench, installs the welding positioning tooling, and then grabs it to the welding station by the manipulator. After the welding of the seat rings on both sides of the valve body cavity is completed, the manipulator grabs it to the welding platform, removes the welding positioning tooling, and then grabs it to the tooling tray of the line body by the manipulator;

[0179] The valve body on the first conveyor line of the polishing area 61 is lifted and transferred to the polishing platform. After polishing by a special machine, it is moved to the middle station of the platform. The pallet can be rotated 180 degrees. After manual inspection of the channels on both sides, it is transferred to the first conveyor line and transferred to the washing station.

[0180] The automatic flushing in the flushing area 62 is mainly to remove the residual iron filings, welding slag, etc. caused by grinding;

[0181] The grinding area 63 is where the robot grabs the wire body from the pallet to the grinder, and after grinding is completed, it automatically grabs the wire body from the grinding station to the tooling pallet at the same position;

[0182] The valve body that has been ground is transferred to the offline station through the line body, and the valve body is hung on the hook of the hanging accumulation chain vehicle group 13 by using the lifting platform, and the empty pallet is transferred from the lower layer of the line body to the valve body loading area 3;

[0183] The hanger with valve body under the accumulation trolley passes through the fully automatic cleaning machine in sequence to complete cleaning, rinsing and drying;

[0184] After passing through the fully automatic cleaning machine, the valve body is transferred to the valve body upper line position (i.e. the entrance end of the valve body pump inspection area) of the third transport line (assembly line), and the valve body is placed on the tooling tray of the third transport line using a lifting platform;

[0185] In the valve body pump inspection area 8, the gate is assembled into the valve body through the inspection equipment to conduct the valve body sealing inspection. After the inspection is completed and the valve body is sprayed with water and anti-rust oil, it enters the general assembly area 12 to prepare for the body cover mold closing;

[0186] When the valve cover enters the first assembly station, the large end face is at the bottom and the small end face is at the top. Turn the valve cover 180°, assemble the sealing seat and then turn it 180° in the opposite direction to keep it consistent with the position when the valve cover is on line. Then assemble the valve stem nut and gland;

[0187] At the second bonnet assembly station, the remaining small parts except the valve stem are assembled on the line body. When the bonnet processing line is reached, the bonnet is hung on the hook of the hanging accumulation chain car group 13 by using a lifting platform. The lifting platform descends, and the empty pallet flows back from the lower layer of the line body to the bonnet loading area 9;

[0188] The valve cover enters the valve cover pump test area 11 along with the suspension accumulation chain vehicle group 13 to perform a valve cover sealing test. The valve cover sealing test in this embodiment is a conventional testing method and will not be described in detail.

[0189] After the valve cover inspection is completed and sprayed with anti-rust oil, it enters the general assembly area 12 to prepare for the body cover mold, hang the gate on the valve stem, place the sealing gasket on the flange 400 of the valve body, and then use the lifting platform to mold the valve cover and the valve body;

[0190] After the valve body and valve cover are molded together, they move forward with the third conveyor line to tighten the studs and nuts and install the handwheel. At this point, the assembly of the gate valve is completed. The finished gate valve is hoisted and moved from the assembly line to the packaging or finished product storage area.

[0191] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A gate valve processing and assembly production line, characterized in that: include: The first transport line body and the second transport line body are suitable for carrying the valve body and valve cover to be processed; A valve body processing line is arranged along the first transport line; the valve body processing line is provided with the following processing areas in sequence, including: a valve body feeding area (3), a welding area (5), a grinding area (6), a chip removal area (7) and a valve body pump testing area (8); A valve cover processing line is arranged along the second transport line; the valve cover processing line is provided with the following processing areas in sequence, including: a valve cover loading area (9), an assembly area (10) and a valve cover pump testing area (11); a general assembly area (12), arranged between the valve body pump test area (8) and the valve cover pump test area (11), suitable for assembling the processed valve body and valve cover together; an end of the first transport line body and an end of the second transport line body are both located in the general assembly area (12); The valve body processing line further comprises: a marking area (4) arranged between the valve body feeding area (3) and the welding area (5); a marking machine is arranged in the marking area (4); The valve body pump inspection area (8) is provided with valve body inspection equipment, including: A detection workbench (1c) is arranged on a base (10c); A detection device (2c), arranged on the detection workbench (1c); comprising a detection cavity (221c); A process valve stem (3c) is axially perpendicular to the detection workbench (1c) and is slidably disposed in the detection cavity (221c); the front end of the process valve stem (3c) is suitable for fixing the gate plate (12c) to be detected; A first driving component (4c) is slidably arranged between the base (10c) and the detection workbench (1c); Driven by the first drive assembly (4c), the detection cavity (221c) is suitable for communicating with the middle cavity of the valve body to be detected, and the opening end surface of the detection cavity (221c) is sealed against the opening of the middle cavity of the valve body to be detected; The process valve stem (3c) is suitable for moving toward the interior of the middle cavity of the valve body to be tested and for abutting the gate plate (12c) to be tested against the seat ring sealing surface of the valve body to be tested; The detection cavity (221c) is suitable for letting a detection fluid flow into it.

2. The gate valve processing and assembly production line according to claim 1 is characterized in that: A loading and unloading device is arranged between each of the processing areas.

3. The gate valve processing and assembly production line according to claim 2 is characterized in that: The loading and unloading device comprises a truss manipulator and a lifting and transplanting machine.

4. The gate valve processing and assembly production line according to any one of claims 1 to 3, characterized in that: The first transport line body and the second transport line body respectively comprise a horizontal conveying device and a suspended accumulation chain vehicle group (13).

5. The gate valve processing and assembly production line according to claim 4 is characterized in that: The horizontal conveying device is a double-layer circulating conveying chain.

6. The gate valve processing and assembly production line according to claim 4 is characterized in that: The suspended accumulation chain vehicle group (13) is arranged between the chip removal area (7) and the valve body pump test area (8); The suspended accumulation chain vehicle group (13) is arranged between the valve cover pump testing area (11) and the final assembly area (12).

7. The gate valve processing and assembly production line according to claim 1 is characterized in that: The valve body seat ring welding equipment is arranged in the welding area (5), including: Rotating platform; The electric positioner (13a) is arranged in a straight line shape and is rotatably arranged on the rotating platform; A pneumatic rotating disk (12a) is mounted on the electric positioner (13a) and connected to a middle flange (400) of the valve body, and is used to drive the valve body to rotate; The welding gun (11a) has an initial position away from the valve body and a working position entering the interior of the valve body, wherein the working position corresponds to the position of the seat ring (200) in the valve body.

8. The gate valve processing and assembly production line according to claim 7 is characterized in that: There are two pneumatic rotating disks (12a), which are arranged on both ends of the electric positioner (13a), and the axes of the two pneumatic rotating disks (12a) coincide with the axis of the electric positioner (13a).

9. The gate valve processing and assembly production line according to claim 7 or 8, characterized in that: The valve body seat ring welding equipment further comprises a positioning tool, the positioning tool is used to place the seat ring (200) against the seat ring hole, the positioning tool comprises: Ontology (4a); A process gate (6a) connected to the bottom of the body (4a) and having two inclined surfaces (61a) symmetrically arranged with respect to a vertical plane of the body (4a); a power device (7a), arranged on the body (4a) and used for driving the fixing device to move radially; and A fixing device is fixed on the body (4a) and is used to position the positioning tool at a preset position in the valve body during radial movement.

10. The gate valve processing and assembly production line according to claim 1, characterized in that: The grinding area (6) comprises a grinding area (61) and a lapping area (63); a lapping device is installed in the lapping area (63), comprising: Rack (1b); At least one grinding workbench (2b) on which a clamp (5b) is arranged, the clamp (5b) being used for mounting and positioning an object to be ground, and the grinding workbench (2b) is provided with a through hole; A grinding disc (4b), suitable for being transported into the inner cavity of an object to be ground; A rotating spindle (8b) is movably arranged on the frame (1b), the rotating spindle (8b) having a first working position and a standby position, wherein the standby position is a position where the rotating spindle (8b) is below the grinding worktable (2b), and the first working position is a position where the rotating spindle (8b) passes upward through the through hole and extends into the inner cavity to install or remove the grinding disc (4b); an automatic grinding disc installation mechanism, arranged at the upper end of the rotating spindle (8b), and used for installing or removing the grinding disc (4b) when the rotating spindle (8b) is in the first working position; A rotary drive mechanism, used for driving the rotary spindle (8b) to rotate and grind; The lifting drive mechanism is used to drive the rotating spindle (8b) to move along a preset trajectory, wherein the preset trajectory is as follows: the rotating spindle (8b) rises from the standby position to the first working position, and after the grinding disc (4b) is installed, moves to the grinding area for grinding; after the grinding area is finished grinding, returns to the first working position to disassemble the grinding disc (4b), and returns to the standby position; The control system is used to communicate with the rotating drive mechanism, the lifting drive mechanism and the grinding disc automatic installation mechanism.

11. The gate valve processing and assembly production line according to claim 10, characterized in that: The frame (1b) is provided with a longitudinal guide rail (11b); The bottom of the grinding workbench (2b) is slidably connected to the longitudinal guide rail (11b) so as to enable the grinding workbench (2b) to move along the longitudinal guide rail (11b) until the rotating spindle is aligned with the through hole.

12. The gate valve processing and assembly production line according to claim 11, characterized in that: Two grinding workbenches (2b) are provided, and the two grinding workbenches (2b) are arranged in parallel along the longitudinal guide rail (11b), and two loading and unloading positions are formed on both sides of the position where the rotating spindle (8b) is located. When one of the grinding workbenches (2b) is in its corresponding loading and unloading position, the other grinding workbench (2b) moves to a position where the rotating spindle is aligned with the through hole.

13. The gate valve processing and assembly production line according to claim 10, characterized in that: The grinding disc automatic installation mechanism comprises a tension sleeve (7b) arranged at the upper end of the rotating main shaft (8b); and a pull rod (9b) arranged in the rotating main shaft (8b) and movable up and down, and the tension sleeve (7b) is pulled by the pull rod (9b) to tighten or loosen the grinding disc (4b).

14. The gate valve processing and assembly production line according to claim 1, characterized in that: The chip removal area (7) comprises a cleaning station (71), a rinsing station (72) and a drying station (73) in sequence.

15. The gate valve processing and assembly production line according to claim 14, characterized in that: The detection device (2c) comprises: A fixed plate (21c), fixed on the detection workbench (1c); at least two fluid channels (211c) communicating with the outside are provided on the fixed plate; a blind plate (22c) which is sealingly arranged on the fixed plate (21c); the detection cavity (221c) is opened on the blind plate (22c); the process valve stem (3c) is slidably arranged on the fixed plate (21c) and its front end is located in the detection cavity (221c); Any one of the fluid channels (211c) is connected to the detection chamber (221c).

16. The gate valve processing and assembly production line according to claim 15, characterized in that: The valve body detection device also includes: A fixing seat (31c) is mounted on the front end of the process valve stem (3c); the fixing seat (31c) is provided with left-right symmetrical fixing parts; any one of the fixing parts is suitable for fixing the gate plate (12c) to be tested.

17. The gate valve processing and assembly production line according to claim 14, characterized in that: The valve body detection device further comprises at least two limit assemblies (7c); Any of the limiting components (7c) comprises: A third driver (71c) is installed on the detection workbench (1c); a limiting portion (72c) fixed to a driving end of the third driver (71c); under the drive of the third driver (71c), the limiting portion (72c) is adapted to move along an extension direction of the process valve stem (3c); The limiting portion (72c) is suitable for pressing and limiting the opening of the middle cavity of the valve body to be tested.

18. The gate valve processing and assembly production line according to claim 17, characterized in that: The limit assembly (7c) is symmetrically arranged on both sides of the process valve stem (3c).

19. The gate valve processing and assembly production line according to claim 18, characterized in that: Also includes: At least one fourth drive assembly (8c) is suitable for driving any one of the limit assemblies (7c) to move in a direction perpendicular to the extension of the process valve stem (3c).

Images