Plasma cutting device for hydrophobic valve

Abstract

The application discloses a kind of plasma cutting device for hydrophobic valve, belong to plasma cutting device technical field, including plasma cutting rack, its feed side is provided with support table, sliding installation is slidably provided on the support table, detachably installed with the V-shaped positioning seat of pair arrangement on the sliding feed table, self-locking anti-loose pressure clamp is clamped and installed on the V-shaped positioning seat, locking cooperation frame is fixedly arranged on the both sides of support table upper end face;Its technical points are: the power of workpiece feeding provided by multiplex screw rod feeding mechanism, rely on roller cooperation pressure guide rail inclined plane mechanism, directly convert the horizontal feeding movement of sliding feed table into the vertical downward pressure of clamp plate, feeding is automatically tightened, back is automatically loose, completely save two-way screw rod, pair of clamp plate and its driving components, can greatly simplify control system, shorten single casting clamping auxiliary working hours.

Description

Technical Field

[0001] This invention relates to the field of plasma cutting equipment technology, specifically a plasma cutting device for a hydrophobic valve. Background Technology

[0002] Steam traps are mostly formed by sand casting. After the casting is completed, the outer side of the blank casting body will have gate and riser structures. The riser is used for solidification and feeding of the casting. It is a redundant structure in the process and must be cut off from the root of the casting in the subsequent process, followed by grinding, flaw detection, machining and other subsequent processes. At present, plasma cutting equipment is commonly used in the industry to remove the risers of steam trap castings.

[0003] Utility model CN216566407U discloses a plasma cutting machine with a clamping device. Its structure includes a worktable, a plasma cutting machine mounted on the worktable, and a base frame. The clamping device includes a mounting base and a slide rail mounted on the base frame. Two first clamping blocks are slidably connected to the slide rail. A rotating rod is rotatably connected to the mounting base, and the rotating rod has threaded sections with opposite directions of rotation. During plate processing, the clamping mechanism can clamp the plate, avoiding the reduction in processing accuracy caused by the plate's own vibration. The clamping mechanism can reliably clamp the four corners of the plate, and the operation of the clamping mechanism in both activation and deactivation is relatively simple. It is stable and reliable in use and has low manufacturing costs.

[0004] The aforementioned device uses a bidirectional screw to drive the two clamping plates to move towards each other, performing horizontal clamping and positioning of the workpiece from both sides. Clamping and self-locking are achieved by the threaded pair. However, its application in the production of riser cutting for steam trap castings exposes several practical technical defects: First, clamping and workpiece feeding are two independent drive systems, resulting in numerous operation steps and low production efficiency. In the comparison document, the bidirectional screw is only responsible for the clamping action, while the workpiece feeding and cutting are completed by another feeding mechanism. In the batch riser cutting production mode, the repeated rotation of the screw consumes a lot of auxiliary time, restricting the overall processing cycle. Secondly, the horizontal clamping mode on both sides is not strong enough to resist cutting vibration, and the casting is prone to movement and deflection. During the riser cutting process, the plasma arc thermal shock and molten slag explosion will generate alternating vibration and impact force, which will cause the clamping gap of the clamping plate to increase and become unstable. In addition, the steam trap casting blank has casting tolerances and its shape is not a regular cylindrical surface. The side clamping plate and the casting have local point and line contact, and the contact area is limited. Once the clamping becomes loose, the casting is prone to vertical jumping and circumferential deflection, which will directly cause the riser cutting edge to deviate, resulting in quality accidents such as excessive riser residue or damage to the casting body and scrapping.

[0005] Therefore, a plasma cutting device for steam traps is proposed to address the above problems. Summary of the Invention

[0006] To address the technical problems of plasma cutting devices in comparative technologies, such as independent clamping and feeding, excessive auxiliary time, poor vibration resistance of horizontal clamping leading to easy movement of castings, inability of rigid clamping plates to adapt to dimensional fluctuations in casting blanks, insufficient constraint on the vertical degree of freedom of castings, and cumbersome clamping and alignment, this invention provides a plasma cutting device for drain valves.

[0007] The technical solution adopted by the embodiments of this application to solve its technical problem is: A plasma cutting device for a steam trap includes a plasma cutting frame with a support platform on the feed side. A sliding feed platform is slidably mounted on the support platform, and a pair of V-shaped positioning seats are detachably mounted on the sliding feed platform. The two ends of the workpiece to be cut overlap on the V-shaped positioning seats. The bottom of the support platform is fixedly installed with a lead screw feeding mechanism, which drives the sliding feed platform to perform reciprocating linear motion when it is working, causing the workpiece to be cut mounted on the sliding feed platform to move closer to or away from the plasma cutting machine frame. The V-shaped positioning seat is fitted with a self-locking anti-loosening clamp, which slides up and down relative to the V-shaped positioning seat. Locking frames are fixedly installed on both sides of the upper surface of the support platform. The bottom end of the self-locking anti-loosening clamp slides and overlaps with the locking frame. During the feeding process, the locking frame gradually applies downward pressure to the bottom end of the self-locking anti-loosening clamp. Under the action of the downward pressure, the self-locking anti-loosening clamp presses the workpiece to be cut that overlaps on the V-shaped positioning seat.

[0008] In one possible implementation, the self-locking anti-loosening clamp includes a clamping plate, both ends of which are fixedly connected to elastic telescopic rods. The bottom end of the elastic telescopic rod is rotatably connected to a rotating wheel seat, and the rotating wheel seat includes a wheel frame on which rollers are rotatably mounted. The locking frame includes a support base on which a mounting plate is fixedly mounted. A pressing guide rail is fixedly mounted on the lower end face of the mounting plate. One end of the pressing guide rail is machined to form a guide bevel for guiding the roller onto the pressing guide rail.

[0009] In one possible implementation, the bottom of the clamping guide rail and the guide slope is machined with rounded corners and chamfers, and the roller is provided with a guide rail engagement groove. During the process of the roller rolling from the guide slope to the clamping guide rail, the roller gradually moves down and pulls down the elastic telescopic rod. During the downward sliding process, the elastic telescopic rod pulls the clamping plate down to clamp the workpiece.

[0010] In one possible implementation, the lower end face of the mounting plate is fixedly provided with two clamping guide rails arranged in a staggered manner, corresponding to the self-locking anti-loosening clamps on the front and rear sides respectively. Correspondingly, the lengths of the wheel frames of the self-locking anti-loosening clamps on the front and rear sides are different, and the rollers installed on the two wheel frames are slidably connected to the corresponding clamping guide rails.

[0011] In one possible implementation, the elastic telescopic rod includes a lower rod and an upper rod, which are slidably connected by a plurality of symmetrically arranged sliding couplings, wherein a tension spring is fixedly connected between the lower rod and the upper rod.

[0012] In one possible implementation, a connecting shaft head is fixedly provided at the bottom end of the lower rod, and the wheel frame is rotatably connected to the connecting shaft head. The connecting shaft head has a locking hole, and a locking bolt is threaded onto the wheel frame. When the wheel frame rotates inward until the roller overlaps with the pressing guide rail, the locking hole aligns with the locking bolt, and the rotation angle of the wheel frame is fixed by the locking bolt engaging the locking hole.

[0013] In one possible implementation, the V-shaped positioning seat includes a base with limiting guide grooves on both sides for installing elastic telescopic rods. When installing the self-locking anti-loosening clamp, the wheel frame is rotated outward and the elastic telescopic rod is inserted into the limiting guide grooves on both sides. After installation, the wheel frame is rotated so that the locking hole is aligned with the locking bolt, and the rotation angle of the wheel frame is fixed by the locking bolt.

[0014] In one possible implementation, the base has a slot in which a clamping block is engaged. The clamping block has a V-shaped opening and a locking block that engages with the slot is fixedly provided on the outside of the clamping block. The lower end face of the base is fixedly provided with several insertion shafts, and the sliding feed table has several insertion positioning holes for the insertion shafts to be inserted and connected.

[0015] In one possible implementation, the lead screw feeding mechanism includes a slide rail, in which a drive slide is slidably mounted, and a transmission lead screw threadedly connected to the drive slide is rotatably mounted in the slide rail. A reduction motor for driving the transmission lead screw is fixedly mounted at the end of the slide rail. A transmission groove is provided on the support platform, and the drive slide is connected to the sliding feed platform through the transmission groove. Several rollers arranged in an array are rotatably mounted on both sides of the sliding feed platform, and the rollers roll in contact with the support platform.

[0016] In one possible implementation, the plasma cutting frame includes a gantry on which an X-axis slide drive assembly is fixedly mounted, a Y-axis slide drive assembly is mounted on the X-axis slide drive assembly, and a plasma cutting head is mounted on the Y-axis slide drive assembly.

[0017] In summary, the present invention has the following beneficial technical effects: This application reuses the screw feed mechanism to provide power for workpiece feeding. Relying on the roller and the inclined plate clamping mechanism, the horizontal feed motion of the sliding feed table is directly converted into the vertical downward clamping force of the clamping plate. The feeding is automatic clamping and the retraction is automatic release. It completely eliminates the need for the bidirectional screw, clamping plate and its driving components, which can greatly simplify the control system. There is no need to output independent action commands for clamping and releasing. It saves the waiting time for screw rotation clamping and releasing, shortens the auxiliary time for clamping single castings, and significantly improves the production cycle of batch cutting risers of steam trap castings. In addition, the V-shaped positioning seat of this invention completes the bottom support and lateral limitation of the casting, and the self-locking anti-loosening clamp presses the casting body from top to bottom, while restricting the casting's vertical and rotational freedom. The roller runs to the straight section of the clamping guide rail to form a mechanical self-lock, which is not affected by cutting vibration. The internal tension spring of the elastic telescopic rod buffers the alternating impact of cutting, and the clamping force is continuously stable, effectively suppressing the jumping and deflection of the casting, avoiding the riser residue exceeding the tolerance and cutting the casting body, while avoiding the casting moving and hitting the plasma cutting head, reducing the risk of equipment damage and improving the yield of the finished product after riser cutting. When the dimensions of the casting blank fluctuate, it is easy to damage the casting or cause clamping misalignment. The elastic telescopic rod of this invention has a built-in tension spring to provide elastic compensation for the clamping amount. When there is a casting deviation in the clamping position of the casting blank of the same batch of steam traps, the tension spring automatically compensates for the stroke to always maintain a suitable clamping force. If the casting is too large, it will not rigidly squeeze and damage the blank. If the casting is too small, there will be no clamping gap misalignment. When changing the casting specifications, there is no need to repeatedly adjust the clamping stroke, reducing the difficulty of operation and adjustment. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the workpiece fixing structure of the present invention; Figure 3 This is a schematic diagram illustrating the working principle of the self-locking anti-loosening clamp of the present invention. Figure 4 This is a schematic diagram of the relevant structure of the self-locking anti-loosening clamp of the present invention; Figure 5 This is a partial structural diagram of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the self-locking anti-loosening clamp structure of the present invention; Figure 7 This is a partial structural diagram of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the lead screw feeding mechanism of the present invention; Figure 9 This is a schematic diagram of the plasma cutting frame structure of the present invention.

[0019] In the diagram: 1. Plasma cutting machine frame; 11. Gantry; 12. X-axis slide drive assembly; 13. Y-axis slide drive assembly; 14. Plasma cutting head; 2. Support table; 21. Transmission groove; 3. Sliding feed table; 31. Insertion positioning hole; 32. Roller; 4. V-shaped positioning seat; 41. Base; 42. Slot; 43. Clamping block; 44. V-shaped opening; 45. Clamping block; 46. Limiting guide groove; 47. Insertion shaft; 5. Lead screw feed mechanism; 51. Slide rail; 52. 53. Drive slide; 54. Transmission screw; 6. Gear motor; 7. Self-locking anti-loosening clamp; 61. Clamping plate; 62. Elastic telescopic rod; 621. Lower rod; 622. Upper rod; 623. Sliding coupling; 624. Tension spring; 625. Connecting shaft head; 63. Rotating wheel seat; 631. Wheel frame; 632. Roller; 64. Locking bolt; 641. Locking hole; 7. Locking mating frame; 71. Support seat; 72. Mounting plate; 73. Pressing guide rail; 74. Guide slope. Detailed Implementation

[0020] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows: like Figure 1 As shown, this embodiment provides a plasma cutting device for a steam trap, including: a plasma cutting frame 1, a support platform 2 on the feed side of the plasma cutting frame 1, a sliding feed platform 3 slidably mounted on the support platform 2, and a pair of V-shaped positioning seats 4 detachably mounted on the sliding feed platform 3. The two ends of the steam trap casting to be processed overlap on the V-shaped positioning seats 4. It should be noted that the workpiece to be processed is a steam trap casting blank with risers. The pair of V-shaped positioning seats 4 support the two sides of the non-processing reference parts of the steam trap casting, realizing the bottom support and preliminary centering of the casting. The V-shaped structure can accommodate casting deviations of the outer diameter of the casting blank within a certain range and limit the horizontal lateral displacement of the casting.

[0021] In addition, a lead screw feeding mechanism 5 is fixedly installed at the bottom of the support platform 2. As the core power component for casting feeding, the lead screw feeding mechanism 5 drives the sliding feed platform 3 to perform reciprocating linear motion when it is working. This drives the casting with riser and drain valve carried on the sliding feed platform 3 to move closer to or away from the plasma cutting machine frame 1, thereby conveying the casting riser to the cutting area. After the riser is cut, the casting is driven back to the loading and unloading station.

[0022] In the above scheme, the V-shaped positioning seat 4 can only complete the positioning and placement of the workpiece to be cut, but the upper side of the workpiece still lacks reliable limiting measures, which makes it easy to shake or slide during the cutting process. Therefore, this application has a self-locking anti-loosening clamp 6 snapped onto the V-shaped positioning seat 4. The self-locking anti-loosening clamp 6 slides up and down relative to the V-shaped positioning seat 4. Locking frames 7 are fixedly installed on both sides of the upper end face of the support platform 2, and the bottom end of the self-locking anti-loosening clamp 6 slides and overlaps with the locking frame 7.

[0023] The working principle of the self-locking anti-loosening clamp 6 and the locking frame 7 is as follows: During the process of the sliding feed table 3 carrying the V-shaped positioning seat 4, the self-locking anti-loosening clamp 6 and the casting with riser and drain valve to the plasma cutting machine frame 1, the locking frame 7 gradually applies downward pressure to the bottom end of the self-locking anti-loosening clamp 6. Under the action of downward pressure, the self-locking anti-loosening clamp 6 presses the drain valve casting body overlapping the V-shaped positioning seat 4 from top to bottom. When the sliding feed table 3 returns to the loading position, the downward pressure applied by the locking frame 7 is gradually released, and the self-locking anti-loosening clamp 6 automatically lifts and releases the drain valve casting, making it convenient for the operator to remove the casting with the riser cut and re-lift and place the next blank with riser.

[0024] The following is a detailed explanation of the structure and working principle of the self-locking anti-loosening clamp 6 and the locking frame 7, which are the core components in the above technical solution.

[0025] Self-locking anti-loosening clamp 6: such as Figures 2-4 As shown, it includes a clamping plate 61, which is arranged laterally above the V-shaped positioning seat 4. A wear-resistant buffer pad can be provided on the lower end surface of the clamping plate 61 to prevent damage to the surface of the cast workpiece during clamping. Both ends of the clamping plate 61 are fixedly connected to elastic telescopic rods 62, and the bottom end of the elastic telescopic rods 62 is rotatably connected to a rotating wheel seat 63. (See reference...) Figure 5 The rotating wheel seat 63 includes a wheel frame 631, on which a roller 632 is rotatably mounted. The roller 632 makes rolling contact with the locking frame 7, converting the horizontal feed displacement of the sliding feed table 3 into a vertical downward pressing displacement, and achieving pressing from top to bottom entirely by relying on the mechanical inclined plane mechanism.

[0026] Locking bracket 7: such as Figures 2-4 As shown, it includes a support base 71, which is locked and fixed to the upper end face of the support platform 2 by high-strength bolts. A mounting plate 72 is fixedly installed on the support base 71, and a clamping guide rail 73 is fixedly installed on the lower end face of the mounting plate 72. One end of the clamping guide rail 73 is machined to form a guide slope 74 for guiding the roller 632 onto the clamping guide rail 73. The guide slope 74 is a gently sloping transition structure. When the sliding feed table 3 moves forward, the roller 632 gradually climbs along the slope of the guide slope 74, gently generating a downward clamping force to avoid hard impact on the mechanism and reduce the impact on the casting.

[0027] The actual cooperation between the self-locking anti-loosening clamp 6 and the locking frame 7 is as follows: The bottom of the clamping guide rail 73 and the guide slope 74 are machined with rounded corners to reduce the risk of the roller 632 rolling and jamming, and to reduce the wear and tear between the parts; the roller 632 is provided with a guide rail engagement groove, which is adapted to the shape of the clamping guide rail 73 to achieve limited movement and prevent the roller 632 from slipping laterally; specifically, as the roller 632 rolls from the guide slope 74 onto the clamping guide rail 73, the roller 632 is constrained by the guide rail and gradually moves downward and pulls down the elastic telescopic rod 62. As the elastic telescopic rod 62 slides downward, it pulls the clamping plate 61 down to clamp the condensate drain valve casting body. After the roller 632 has completely traveled to the straight section of the clamping guide rail 73, it maintains a stable mechanical downward pressure to keep the casting in a mechanical self-locking clamping state and carry out riser cutting operations.

[0028] Because this application includes two sets of self-locking anti-loosening clamps 6, two clamping guide rails 73 are also required. However, the clamping guide rails 73 are quite long, and if they are arranged coaxially, they will interfere with the rolling of the rollers 632, affecting normal feeding operations and also resulting in an excessively long overall structure. Therefore, if... Figure 4 As shown, two staggered clamping guide rails 73 are fixedly installed on the lower end face of the mounting plate 72, corresponding to the self-locking anti-loosening clamps 6 on the front and rear sides respectively; correspondingly, the wheel frames 631 of the self-locking anti-loosening clamps 6 on the front and rear sides are of different lengths, and the rollers 632 installed on the two wheel frames 631 are slidably connected with the corresponding clamping guide rails 73; the wheel frames 631 of different lengths, together with the staggered clamping guide rails 73, can effectively avoid interference between the movement paths of the two sets of rollers 632, ensure that the front and rear ends of the steam trap casting are clamped synchronously, constrain the casting in the vertical direction, and prevent the casting from tilting or deflecting.

[0029] Elastic telescopic rod 62: such as Figure 5 As shown, it includes a lower rod 621 and an upper rod 622. The lower rod 621 and the upper rod 622 are slidably connected by several symmetrically arranged sliding shafts 623. The sliding shafts 623 play a guiding and limiting role, restricting the lower rod 621 and the upper rod 622 to only undergo relative displacement in the vertical direction, avoiding radial offset jamming. A tension spring 624 is fixedly connected between the lower rod 621 and the upper rod 622. When the roller 632 presses down and drives the lower rod 621 to move downward, the tension spring 624 is stretched, providing elastic compensation clamping force.

[0030] For the casting dimensional tolerances of the steam trap casting blank, the tension spring 624 can achieve elastic compensation of the clamping amount; under the condition of vibration and impact generated by riser cutting, the tension spring 624 can ensure that it always provides tension, ensuring that the clamping plate 61 is always close to the casting body, and the clamping force will not be lost due to casting dimensional deviation or cutting vibration.

[0031] In addition, such as Figures 5-6 As shown, a connecting shaft head 625 is fixedly installed at the bottom end of the lower rod 621. The wheel frame 631 is rotatably connected to the connecting shaft head 625. The wheel frame 631 can fold outward or retract inward around the connecting shaft head 625. A locking hole 641 is provided on the connecting shaft head 625, and a locking bolt 64 is threaded onto the wheel frame 631. When the wheel frame 631 rotates inward to the working position where the roller 632 overlaps with the pressing guide rail 73, the locking hole 641 aligns with the locking bolt 64. The locking bolt 64 engages with the locking hole 641 to fix the rotation angle of the wheel frame 631, preventing the roller 632 from deflecting and derailing under the vibration environment of riser cutting. (Reference) Figure 6 Schematic diagram at point a; When it is necessary to disassemble, install, or repair the self-locking anti-loosening clamp 6, or clean the slag nodules adhering to the component, unscrew the locking bolt 64 and flip the wheel frame 631 outward to unlock it, which facilitates disassembly and maintenance. (Refer to...) Figure 6 Schematic diagram at point b in the middle.

[0032] Based on the rotation and locking of the aforementioned wheel frame 631, the following mainly introduces the installation and disassembly measures of the self-locking anti-loosening clamp 6 as a whole.

[0033] First, it should be noted that the V-shaped positioning seat 4 includes a base 41, on both sides of which are provided with limiting guide grooves 46 for installing the elastic telescopic rod 62. The limiting guide grooves 46 vertically guide the elastic telescopic rod 62, restricting the elastic telescopic rod 62 to slide up and down along the tank body. A simple slag-blocking guard plate can be installed on the outside of the limiting guide grooves 46 to prevent cutting slag from entering the tank body and getting stuck. When installing the self-locking anti-loosening clamp 6, the rotating wheel frame 631 is turned outward and the elastic telescopic rod 62 is inserted into the limiting guide grooves 46 on both sides. After installation, the wheel frame 631 is rotated so that the locking hole 641 is aligned with the locking bolt 64. The locking bolt 64 fixes the rotation angle of the wheel frame 631, completing the assembly of the self-locking anti-loosening clamp 6 on the V-shaped positioning seat 4.

[0034] As an essential component for clamping workpieces in conjunction with the self-locking anti-loosening clamp 6, such as Figure 5 As shown, a slot 42 is provided in the base 41, and a clamping block 43 is clamped and installed in the slot. A V-shaped opening 44 is machined on the clamping block 43, which is used to support the body of the steam trap casting. A clamping block 45 is fixedly provided on the outside of the clamping block 43, which engages with the slot 42. The clamping block 45 and the slot 42 can be quickly engaged, and the operator can directly pull out and replace the clamping block 43 to replace clamping blocks 43 with different opening sizes and different support profiles, so as to adapt to the profile of different models of steam trap casting blanks and adapt to the irregular shape of the casting. The clamping block 43 directly bears the load of the casting and is subjected to long-term wear from molten slag splashing. The clamping structure makes it easy to replace the worn clamping block 43 separately without replacing the entire base 41, thus reducing spare parts costs.

[0035] Among them, such as Figure 7As shown, a number of plug-in shafts 47 are fixedly installed on the lower end face of the base 41, and a number of plug-in positioning holes 31 are opened on the sliding feed table 3 for plug-in shafts 47 to be plugged in and connected; the V-shaped positioning seat 4 can be quickly positioned and disassembled by relying on the plug-in shafts 47 and the plug-in positioning holes 31, without the need to disassemble a large number of bolts, and it is convenient to adjust the distance between the two sets of V-shaped positioning seats 4 to adapt to steam trap casting blanks of different total length specifications.

[0036] Since the lead screw feeding mechanism 5 and the plasma cutting frame 1 are existing mature technologies, and this application only uses the above two as necessary functional implementation components without making any improvements, the following content only briefly describes the structure and working principle of the above two.

[0037] Screw feed mechanism 5: such as Figure 8 As shown, the slide rail 51 is included, a drive slide 52 is slidably mounted in the slide rail 51, and a transmission screw 53 threadedly connected to the drive slide 52 is rotatably mounted in the slide rail 51. A reduction motor 54 that drives the transmission screw 53 is fixedly mounted at the end of the slide rail 51. The reduction motor 54 outputs torque to drive the transmission screw 53 to rotate, and the rotational power is converted into linear power through the threaded pair, thereby driving the drive slide 52 to move. The support platform 2 is provided with a transmission groove 21, and the drive slide 52 is connected to the sliding feed platform 3 through the transmission groove 21 to transmit power to the sliding feed platform 3. A slag-blocking cover plate is provided at the position of the transmission groove 21 to prevent molten slag from falling into the screw drive pair. Several rollers 32 arranged in an array are rotatably installed on both sides of the sliding feed platform 3. The rollers 32 roll and fit against the support platform 2. The rollers 32 reduce the frictional resistance between the sliding feed platform 3 and the support platform 2, reduce the feed load, and improve the smoothness of the feed movement.

[0038] Plasma cutting frame 1: such as Figure 9 As shown, the system includes a gantry 11 on which an X-axis slide drive assembly 12 is fixedly mounted. A Y-axis slide drive assembly 13 is mounted on the X-axis slide drive assembly 12, and a plasma cutting head 14 is mounted on the Y-axis slide drive assembly 13. The X-axis slide drive assembly 12 and the Y-axis slide drive assembly 13 can drive the plasma cutting head 14 to complete lateral and longitudinal displacement, and perform thermal cutting on the root of the riser of the steam trap casting to realize the casting riser removal operation.

[0039] The X-axis slide drive assembly 12 and the Y-axis slide drive assembly 13 are existing mature structures of linear slides commonly used in the machine tool field. They can be driven by servo motors in conjunction with ball screws or synchronous belts to achieve high-precision reciprocating linear displacement. They are used to drive the end effector to complete the position adjustment in the plane. Their specific internal structure, electrical wiring and control logic are existing technologies and will not be described in detail in this application. The plasma cutting head 14 is a standard execution component of commercial plasma gas cutting machines. It is connected to an external plasma power supply, working gas pipeline and cooling circuit. It relies on the plasma arc to realize the thermal cutting operation of metal castings. Its arc ignition, gas control, cooling protection and other functions are directly adopted from the existing plasma gas cutting machine supporting components. Therefore, this specification will not elaborate on its internal structure and working principle.

[0040] The principle and process of using this invention: The operator hoists the steam trap blank with the cast riser and places it on the V-shaped opening 44 of the two sets of V-shaped positioning seats 4 to complete the bottom support and initial lateral centering, without the need for fine alignment; the equipment is started, the reduction motor 54 drives the transmission screw 53 to rotate, and drives the sliding feed table 3 to feed towards the plasma cutting machine frame 1; the roller 632 contacts the guide slope 74 and climbs up the slope, the clamping guide rail 73 generates a downward force on the roller 632, pulls down the elastic telescopic rod 62, the tension spring 624 is stretched, and the clamping plate 61 presses down to clamp the steam trap casting body; after the roller 632 rolls to the straight section of the clamping guide rail 73, it enters the mechanical self-locking clamping state, and the casting is supported by the bottom of the V-shaped positioning seat 4 and pressed down by the clamping plate 61 from top to bottom, constrained in all directions; The sliding feed table 3 continues to feed, transporting the casting riser to the cutting station of the plasma cutting head 14; the X-axis slide table drive assembly 12 and the Y-axis slide table drive assembly 13 adjust the position of the plasma cutting head 14, align it with the root of the riser, and start the plasma cutting head 14 for thermal cutting to remove the casting riser from the casting body; the vibration generated during the cutting process is buffered by the tension spring 624, and the casting is always reliably clamped and will not move or tilt. After the riser is cut, the screw feed mechanism 5 reverses and drives the sliding feed table 3 back to the loading position; the roller 632 exits the clamping guide rail 73 along the guide slope 74, the downward pressure disappears, the tension spring 624 rebounds, and the clamping plate 61 lifts to release the drain valve casting; the operator lifts away the casting with the riser removed, places the next blank with the riser, and enters the next round of cutting cycle; When replacing castings of different models of steam traps: Remove the V-shaped positioning seat 4, insert the plug shaft 47 into different plug positioning holes 31, and adjust the distance between the two sets of V-shaped positioning seats 4 to match the total length of the casting; pull out and replace the corresponding clamping block 43 to match the shape of the casting. When the clamping block 43 and roller 632 are worn by molten slag splashing, or when molten slag adheres to the moving parts and forms nodules, the corresponding parts can be quickly disassembled for cleaning or replacement with spare parts.

[0041] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A plasma cutting device for a steam trap, characterized in that, include: The plasma cutting machine frame (1) has a support platform (2) on its feed side. A sliding feed platform (3) is slidably installed on the support platform (2). A pair of V-shaped positioning seats (4) are detachably installed on the sliding feed platform (3). The two ends of the workpiece to be cut are attached to the V-shaped positioning seats (4). The bottom of the support platform (2) is fixedly installed with a lead screw feeding mechanism (5), which drives the sliding feeding platform (3) to perform reciprocating linear motion when it is working, causing the workpiece to be cut installed on the sliding feeding platform (3) to move closer to or away from the plasma cutting frame (1). The V-shaped positioning seat (4) is fitted with a self-locking anti-loosening clamp (6), which slides up and down relative to the V-shaped positioning seat (4). Locking frames (7) are fixedly installed on both sides of the upper surface of the support platform (2). The bottom end of the self-locking anti-loosening clamp (6) slides and overlaps with the locking frame (7). During the feeding process, the locking frame (7) gradually applies downward pressure to the bottom end of the self-locking anti-loosening clamp (6). Under the action of the downward pressure, the self-locking anti-loosening clamp (6) presses the workpiece to be cut on the V-shaped positioning seat (4).

2. The plasma cutting device for a steam trap according to claim 1, characterized in that: The self-locking anti-loosening clamp (6) includes a clamp plate (61), both ends of which are fixedly connected to elastic telescopic rods (62). The bottom end of the elastic telescopic rod (62) is rotatably connected to a rotating wheel seat (63). The rotating wheel seat (63) includes a wheel frame (631), and a roller (632) is rotatably mounted on the wheel frame (631). The locking frame (7) includes a support base (71) on which a mounting plate (72) is fixedly mounted. A pressing guide rail (73) is fixedly mounted on the lower end face of the mounting plate (72). One end of the pressing guide rail (73) is machined to form a guide bevel (74) for guiding the roller (632) onto the pressing guide rail (73).

3. The plasma cutting device for a steam trap according to claim 2, characterized in that: The bottom of the clamping guide rail (73) and the guide slope (74) are machined with rounded corners and chamfers. The roller (632) is provided with a guide rail engagement groove. During the process of the roller (632) rolling from the guide slope (74) onto the clamping guide rail (73), the roller (632) gradually moves down and pulls down the elastic telescopic rod (62). During the downward sliding process, the elastic telescopic rod (62) pulls the clamping plate (61) down to clamp the workpiece.

4. The plasma cutting device for a steam trap according to claim 2, characterized in that: The mounting plate (72) is fixedly provided with two clamping guide rails (73) arranged in a staggered manner, which correspond to the self-locking anti-loosening clamps (6) on the front and rear sides respectively. Correspondingly, the lengths of the wheel frames (631) of the self-locking anti-loosening clamps (6) on the front and rear sides are different, and the rollers (632) installed on the two wheel frames (631) slide and overlap with the corresponding clamping guide rails (73).

5. The plasma cutting device for a steam trap according to claim 2, characterized in that: The elastic telescopic rod (62) includes a lower rod (621) and an upper rod (622). The lower rod (621) and the upper rod (622) are slidably connected by a number of symmetrically arranged sliding couplings (623). A tension spring (624) is fixedly connected between the lower rod (621) and the upper rod (622).

6. The plasma cutting device for a steam trap according to claim 5, characterized in that: The bottom end of the lower rod (621) is fixedly provided with a connecting shaft head (625), and the wheel frame (631) is rotatably connected to the connecting shaft head (625). The connecting shaft head (625) is provided with a locking hole (641), and the wheel frame (631) is threadedly connected with a locking bolt (64). When the wheel frame (631) rotates inward until the roller (632) overlaps with the pressing guide rail (73), the locking hole (641) is aligned with the locking bolt (64), and the rotation angle of the wheel frame (631) is fixed by the locking bolt (641) being inserted into the locking hole (641).

7. The plasma cutting device for a steam trap according to claim 6, characterized in that: The V-shaped positioning seat (4) includes a base (41), and both sides of the base have limiting guide grooves (46) for installing the elastic telescopic rod (62). When installing the self-locking anti-loosening clamp (6), the wheel frame (631) is rotated outward and the elastic telescopic rod (62) is inserted into the limiting guide grooves (46) on both sides. After installation, the wheel frame (631) is rotated so that the locking hole (641) is aligned with the locking bolt (64) and the angle of the wheel frame (631) is fixed by the locking bolt (64).

8. The plasma cutting device for a steam trap according to claim 7, characterized in that: The base (41) has a slot (42) and a clamping block (43) is installed in the slot. A V-shaped opening (44) is formed on the clamping block (43), and a clamping block (45) is fixedly provided on the outside of the clamping block (43) to engage with the slot (42). A number of plug-in shafts (47) are fixedly provided on the lower end face of the base (41), and a number of plug-in positioning holes (31) for plug-in shafts (47) to be plugged in are provided on the sliding feed table (3).

9. The plasma cutting device for a steam trap according to claim 1, characterized in that: The lead screw feeding mechanism (5) includes a slide rail (51), a drive slide (52) is slidably installed in the slide rail (51), and a transmission lead screw (53) threadedly connected to the drive slide (52) is rotatably installed in the slide rail (51). A reduction motor (54) for driving the transmission lead screw (53) is fixedly installed at the end of the slide rail (51). A transmission groove (21) is provided on the support platform (2). The drive slide (52) is connected to the sliding feed platform (3) through the transmission groove (21). Several rollers (32) arranged in an array are rotatably installed on both sides of the sliding feed platform (3). The rollers (32) roll and fit against the support platform (2).

10. The plasma cutting device for a steam trap according to claim 1, characterized in that: The plasma cutting frame (1) includes a gantry (11) on which an X-axis slide drive assembly (12) is fixedly installed. A Y-axis slide drive assembly (13) is installed on the X-axis slide drive assembly (12), and a plasma cutting head (14) is installed on the Y-axis slide drive assembly (13).

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