Anti-short-circuit valve seat high-frequency quenching induction coil

Abstract

The application discloses a short-circuit prevention valve seat high-frequency quenching induction coil and relates to the technical field of induction coils. The induction coil comprises an induction pipe, the induction pipe is bent in multiple turns, the induction pipe is divided into a wiring end and a separation end after being bent, further comprises an insulating pipe for reducing the magnetic force influence of the induction pipe, a center positioning mechanism for automatically clamping and correcting the workpiece during quenching, and a strength adjusting mechanism for adjusting the number of turns of the induction pipe. The short-circuit prevention valve seat high-frequency quenching induction coil can not only move synchronously with the induction pipe through the center positioning mechanism to improve portability, but also automatically corrects the position of the workpiece when the induction pipe is placed on the workpiece before quenching, so that the workpiece and the induction pipe are on the same center line, thereby improving the quenching uniformity. When the inclination angle of the induction pipe is too large, the induction pipe cannot be normally placed on the workpiece, thereby reminding the operator.

Description

Technical Field

[0001] This invention relates to the field of induction coil technology, and more particularly to a valve seat high-frequency quenching induction coil with short-circuit protection. Background Technology

[0002] The valve seat is a crucial sealing component in high-pressure valves, and its sealing surface requires high-frequency surface hardening. Induction hardening is often used for this process. Induction hardening involves energizing an induction coil, which generates eddy currents within the workpiece through electromagnetic induction, thus heating the workpiece. Induction hardening types include: power frequency, low frequency, medium frequency, ultrasonic frequency, high frequency, and ultra-high frequency. The appropriate frequency is selected based on the required hardening depth. A deeper hardened layer requires a lower frequency, and vice versa.

[0003] However, in induction hardening, traditional induction coils are often made of copper tubing. The copper tubing is annealed and bent into shape, resulting in a single-turn induction coil. A copper plate of a corresponding size is then welded onto the copper tubing according to the size of the valve seat sealing surface. During use, because the induction coil is single-turn, the heating intensity is constant and often low under the same current intensity, leading to a long heating time. Furthermore, when heating different valve seat models, the heating area varies. Since the number of induction coil turns cannot be adjusted, increasing the current intensity is often the only way to improve heating efficiency, increasing energy consumption. Additionally, when heating the valve seat, the workpiece is attracted by the magnetic force of the induction coil carrying a strong current, causing displacement and uneven heating due to the workpiece being positioned differently within the magnetic field. Moreover, since the heating time is short, often only a few seconds, existing clamping mechanisms are complex. To improve production efficiency, manual clamping with needle-nose pliers is often used to fix the workpiece, reducing operation steps and clamping time before heating. Summary of the Invention

[0004] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. This invention provides a short-circuit-resistant high-frequency quenching induction coil for valve seats, solving the problems of existing quenching induction coils requiring specialized clamping mechanisms for workpiece quenching, resulting in long clamping times, low efficiency, and the inability to adjust the induction coil intensity during heating.

[0005] The present invention adopts the following technical solution: a short-circuit-proof valve seat high-frequency quenching induction coil, including an induction tube, the induction tube being bent in multiple turns, the induction tube being divided into a connection end and a separation end after bending, and also including an insulating tube for reducing the influence of the magnetic force of the induction tube, a center positioning mechanism for automatically clamping and correcting deviation during workpiece quenching, and a strength adjustment mechanism for adjusting the number of bends of the induction tube, the strength adjustment mechanism including a connecting rod, the connecting rod being connected to the separation end, a connecting lever being provided through the connecting rod, a plurality of positioning holes being opened on the upper surface of the connecting lever, a plurality of elastic positioning blocks being provided through the connecting rod, the elastic positioning blocks being connected to the connecting rod by a return spring post, the elastic positioning blocks cooperating with the positioning holes, a connecting block being provided at the end of the connecting lever, a contact block being provided on the inner surface of the connecting block, a contact block being provided below the separation end of the induction tube, and the contact block being connected to the contact block by a connecting wire.

[0006] Furthermore, the sensing tube is made of copper, and the insulating tube is made of beeswax. The insulating tube is sleeved on the outside of the sensing tube, and the insulating tube has contact ports, with each contact port on the same horizontal line and the opening direction of each contact port being the same.

[0007] Furthermore, the sensing tube is arranged in multiple turns, and there is a gap between each turn of the sensing tube. The gap between each turn of the sensing tube is greater than the sum of the thicknesses of the touch block and the connecting block.

[0008] Furthermore, the connecting block, connecting lever, and contact block are all made of insulating material.

[0009] Furthermore, the central positioning mechanism includes a connecting plate and a positioning post. The connecting plate has several guide grooves, and each guide groove has a spring telescopic rod at its end. The output end of the spring telescopic rod is connected to the positioning post. The positioning post passes through the guide groove and is located below the connecting plate. A connecting groove is located at the center of the connecting plate, and a detection ball is placed inside the connecting groove. An annular sleeve is placed outside the detection ball, and a mating sleeve is placed above the annular sleeve. The mating sleeve is connected to the connecting groove. A compression post is placed below the detection ball, and a compression connecting mating plate is connected to the bottom end of the compression post. A mating box is placed above the detection ball. The mating box is cylindrical, and a movable base plate is placed at the bottom inside the mating box. The movable base plate is connected to the inner wall of the mating box by a return spring. A connecting pipe is provided between the mating box and the spring telescopic rod.

[0010] Furthermore, the connecting groove is spherical in shape, and the inner diameter of the connecting groove is much larger than the outer diameter of the detection ball.

[0011] Furthermore, the outer end of the upper surface of the annular sleeve is designed with an arc surface, and the outer end of the lower surface of the mating sleeve is designed with an arc surface.

[0012] Furthermore, the extrusion column, connecting groove, and mating box are located on the same center line.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] Firstly, during use, the current flow length of the induction tube can be adjusted through the intensity adjustment mechanism, thereby adjusting the number of turns of the induction tube. This allows the device to perform induction hardening on different types of workpieces without adjusting the current intensity of the induction tube. Initially, the induction tube has multiple turns, but by adjusting the position of the contact block in the intensity adjustment mechanism, the current flow path length can be adjusted. This allows the induction coil intensity to be changed without altering the current intensity, thus changing the hardening intensity of the induction tube. Furthermore, during use, the back-facing design of the contact ports on each turn of the induction tube reduces the magnetic force of the induction tube, minimizing its impact on the workpiece. Moreover, the initial multiple turns of the induction tube increase the magnetic induction intensity. Additionally, the yellow wax tube surrounding the induction tube further reduces the magnetic force, thereby minimizing safety hazards.

[0015] Secondly, a central positioning mechanism is incorporated into the device. Since this mechanism is directly connected to the induction tube, it can move synchronously with the tube, increasing portability and allowing for flexible, non-fixed quenching positions. This eliminates the need for a dedicated clamping mechanism. Furthermore, the central positioning mechanism automatically clamps the workpiece once the induction tube is placed on it, eliminating the need for additional steps and significantly improving processing efficiency. During clamping, the mechanism can also adjust the workpiece position to prevent malfunctions. During placement, a significant difference between the center position of the induction tube and the center position of the workpiece can lead to uneven heating of the workpiece. Furthermore, during induction hardening, the induction tube is held by the operator, and this handheld action can cause it to tilt, affecting the hardening effect. A central positioning mechanism can detect this tilt angle, preventing uneven hardening due to a large tilt. If the tilt angle is too large, the induction tube may fail to properly clamp and fix the workpiece, alerting the operator to correct the tilt and serving as a warning.

[0016] In summary, during use, this device not only moves synchronously with the induction tube via the central positioning mechanism, improving portability, but also automatically corrects and positions the workpiece when the induction tube is placed on the workpiece before quenching, ensuring that the workpiece and the induction tube are on the same center line, thus improving quenching uniformity. Furthermore, if the induction tube tilts too much, it cannot be properly placed on the workpiece, alerting the operator. Moreover, during use, the flow path length of the induction tube can be adjusted via the intensity adjustment mechanism, allowing the device to adjust the intensity of the induction tube without changing the current intensity. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the strength adjustment mechanism of the present invention;

[0020] Figure 3 This is a schematic diagram of the touch block position structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the central positioning mechanism of the present invention;

[0022] Figure 5 This is a cross-sectional view of the connecting plate of the present invention;

[0023] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle.

[0024] Figure label:

[0025] 11. Sensing tube; 12. Insulating tube; 13. Contact port; 2. Center positioning mechanism; 21. Connecting plate; 22. Spring telescopic rod; 23. Connecting tube; 24. Mating box; 25. Compression connecting mating plate; 26. Guide groove; 27. Return spring; 28. Movable base plate; 29. ​​Detection ball; 210. Annular sleeve; 211. Connecting groove; 212. Mating sleeve; 213. Positioning post; 214. Extrusion post; 3. Strength adjustment mechanism; 31. Connecting lever; 32. Elastic positioning block; 33. Connecting rod; 34. Positioning hole; 35. Contact block; 36. Connecting block; 37. Connecting spring post; 38. Touch block. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] The following is combined Figures 1 to 6As shown, this embodiment of the invention provides a short-circuit-proof valve seat high-frequency quenching induction coil, including an induction tube 11, which is bent in multiple turns. After bending, the induction tube 11 is divided into a connection end and a separation end. It also includes an insulating tube 12 to reduce the magnetic influence of the induction tube 11, a center positioning mechanism 2 for automatically clamping and correcting the workpiece during quenching, and a strength adjustment mechanism 3 for adjusting the number of bends of the induction tube 11. The strength adjustment mechanism 3 includes a connecting rod 33 connected to the separation end, with a through-hole extending from the connecting rod 33. A connecting lever 31 is provided, and a plurality of positioning holes 34 are formed on the upper surface of the connecting lever 31. A plurality of elastic positioning blocks 32 are provided through the connecting rod 33. The elastic positioning blocks 32 are connected to the connecting rod 33 by a return spring 27. The elastic positioning blocks 32 are used in conjunction with the positioning holes 34. A connecting block 36 is provided at the end of the connecting lever 31. A contact block 38 is provided on the inner surface of the connecting block 36. A contact block 35 is provided below the separating end of the sensing tube 11. The contact block 38 and the contact block 35 are connected by a connecting wire.

[0032] During operation, the central positioning mechanism 2 not only moves synchronously with the induction tube 11, improving portability, but also automatically corrects and positions the workpiece when the induction tube 11 is placed on the workpiece before quenching, ensuring that the workpiece and the induction tube 11 are on the same center line, thus improving the uniformity of quenching. Furthermore, if the induction tube 11 tilts too much, it cannot be placed properly on the workpiece, thus alerting the operator. During use, the flow path length of the induction tube 11 can be adjusted through the intensity adjustment mechanism 3, allowing the device to adjust the intensity of the induction tube 11 without changing the current intensity.

[0033] Specifically, the sensing tube 11 is made of copper, and the insulating tube 12 is made of beeswax. The insulating tube 12 is sleeved on the outside of the sensing tube 11. The insulating tube 12 has contact ports 13, and each contact port 13 is on the same horizontal line and the opening direction of each contact port 13 is the same.

[0034] During operation, the magnetic strength of the induction tube 11 can be reduced by the action of the insulating tube 12. At the same time, the magnetic strength can also be reduced because the contact ports 13 are facing the same direction.

[0035] Specifically, the sensing tube 11 is arranged in multiple turns, and there is a gap between each turn of the sensing tube 11. The gap between each turn of the sensing tube 11 is greater than the sum of the thicknesses of the touch block 38 and the connecting block 36.

[0036] During operation, since the induction tube 11 is configured with multiple turns, the magnetic induction intensity of the induction tube 11 can be increased, thereby improving the heating efficiency.

[0037] Specifically, the connecting block 36, the connecting lever 31, and the contact block 38 are all made of insulating material.

[0038] Specifically, the central positioning mechanism 2 includes a connecting plate 21 and a positioning post 213. The connecting plate 21 has several guide grooves 26, and each guide groove 26 has a spring telescopic rod 22 at its end. The output end of the spring telescopic rod 22 is connected to the positioning post 213. The positioning post 213 is positioned below the connecting plate 21, passing through the guide grooves 26. A connecting groove 211 is formed at the center of the connecting plate 21. A detection ball 29 is placed inside the connecting groove 211, and an annular sleeve 210 is placed outside the detection ball 29. A fitting sleeve 212 is provided above the detection ball 29, and the fitting sleeve 212 is connected to the connecting groove 211. A compression column 214 is provided below the detection ball 29, and a compression connecting fitting plate 25 is connected to the bottom end of the compression column 214. A fitting box 24 is provided above the detection ball 29. The fitting box 24 is cylindrical. A movable base plate 28 is provided at the bottom of the fitting box 24. The movable base plate 28 is connected to the inner wall of the fitting box 24 by a return spring 27. A connecting pipe 23 is provided between the fitting box 24 and the spring telescopic rod 22.

[0039] Specifically, the connecting groove 211 is spherical, and the inner diameter of the connecting groove 211 is much larger than the outer diameter of the detection ball 29.

[0040] Specifically, the outer end of the upper surface of the annular sleeve 210 is designed with an arc surface, and the outer end of the lower surface of the mating sleeve 212 is designed with an arc surface.

[0041] Specifically, the extrusion column 214, the connecting groove 211, and the mating box 24 are located on the same center line.

[0042] During operation, the detection ball 29 is allowed to move under the influence of the extrusion column 214, so that the detection ball 29 can contact the movable base plate 28, thereby extruding the medium inside the mating box 24.

[0043] Working principle: During use, firstly, the connecting lever 31 is pulled according to the quenching surface condition of the workpiece. While pulling the connecting lever 31, the contact block 38 deflects the sensing tube 11 under the action of the connecting spring column 37. When the contact block moves between two adjacent turns of the sensing tube 11, it resets under the action of the connecting spring column 37. At this point, the contact block is inserted into the contact port and connected to the sensing tube 11. When current enters from the terminal, the current flows through the sensing tube 11 and then out from the contact block. Due to the different positions of the contact blocks, the current path length is different, thereby adjusting the number of turns of the sensing tube 11. After the section is completed, the elastic positioning block 32 is inserted into the positioning hole 34, thereby limiting the connecting lever 31. When the induction tube 11 is used to quench the workpiece, when the induction tube 11 is moved onto the workpiece, the connecting plate 21 is above the workpiece. At this time, the induction tube 11 is moved down, and the compression connecting plate 25 located below the induction tube 11 abuts against the top surface of the workpiece. The compression connecting plate 25 is compressed and deformed. At this time, the bottom of the compression connecting plate 25 moves upward, thereby driving the extrusion column 214 to move upward. During the upward movement of the extrusion column 214, the device is affected by the user's state. When the device is placed on the workpiece, the device tilts. If the tilt angle is too large, the detection ball 29 set in the connecting plate 21 will move to one side due to gravity and inertia. When the detection ball moves, it drives the annular sleeve 210 to move. If the tilt angle is too large, during the process of the extrusion column 214 moving upward and contacting the detection ball 29, the annular sleeve 210 will contact the mating sleeve 212, preventing the detection ball 29 from moving upward normally. This reminds the user that the tilt angle of the sensing coil is too large and needs to be adjusted. When the tilt angle is within the appropriate range, the extrusion column 214 will contact the detection ball 29 and drive it to move upward normally, causing the detection ball 29 to contact the movable base plate 28. The upward movement of the detection ball 29 will then drive the detection ball to move upward. The movable base plate 28 moves upward, which squeezes the liquid in the mating box 24. The liquid enters the spring telescopic rod 22 through the connecting pipe 23, causing the length of the spring telescopic rod 22 to change, thereby driving the positioning column 213 to move outward. After the positioning column 213 moves outward, since the positioning column 213 moves outward synchronously, if the workpiece is misaligned, it can be corrected under the action of the positioning column 213, so that the center line of the workpiece and the center line of the positioning column 213 are on the same horizontal line, thereby ensuring that the workpiece can be heated evenly. Then, the power is turned on to heat the workpiece. After heating is completed, the induction tube 11 is lifted.

[0044] In summary, during use, the device not only allows the central positioning mechanism 2 to move synchronously with the induction tube 11, improving portability, but also automatically corrects and positions the workpiece when the induction tube 11 is placed on the workpiece before quenching, ensuring that the workpiece and the induction tube 11 are on the same center line, thus improving the uniformity of quenching. Furthermore, if the induction tube 11 tilts too much, it cannot be properly placed on the workpiece, thus alerting the operator. Moreover, during use, the strength adjustment mechanism 3 can adjust the flow path length of the induction tube 11, allowing the device to adjust the strength of the induction tube 11 without changing the current intensity.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve seat high-frequency quenching induction coil for short circuit prevention, comprising an induction tube (11), wherein the induction tube (11) is bent in multiple turns, and the induction tube (11) is divided into a wiring end and a disconnection end after bending, characterized in that; It also includes an insulating tube (12) for reducing the magnetic influence of the induction tube (11), a center positioning mechanism (2) for automatically clamping and correcting the workpiece during quenching, and a strength adjustment mechanism (3) for adjusting the number of bends of the induction tube (11). The strength adjustment mechanism (3) includes a connecting rod (33) connected to the separation end. A connecting lever (31) is provided through the connecting rod (33). Several positioning holes (34) are opened on the upper surface of the connecting lever (31). (33) has several elastic positioning blocks (32) through it. The elastic positioning blocks (32) are connected to the connecting rod (33) by a reset spring column. The elastic positioning blocks (32) are used in conjunction with the positioning holes (34). The end of the connecting lever (31) is provided with a connecting block (36). The inner surface of the connecting block (36) is provided with a touch block (38). The lower part of the separating end of the sensing tube (11) is provided with a contact block (35). The touch block (38) and the contact block (35) are connected by a connecting wire.

2. The valve seat high-frequency quenching induction coil for short circuit prevention according to claim 1, characterized in that; The sensing tube (11) is made of copper, and the insulating tube (12) is made of beeswax. The insulating tube (12) is sleeved on the outside of the sensing tube (11). The insulating tube (12) has a contact port (13), and each contact port (13) is on the same horizontal line. The opening direction of each contact port (13) is the same.

3. The valve seat high-frequency quenching induction coil for short circuit prevention according to claim 1, characterized in that; The sensing tube (11) is arranged in multiple turns, and there is a gap between each turn of the sensing tube (11). The gap between each turn of the sensing tube (11) is greater than the sum of the thicknesses of the touch block (38) and the connecting block (36).

4. The valve seat high-frequency quenching induction coil for short circuit prevention according to claim 1, characterized in that; The connecting block (36), connecting lever (31) and contact block (38) are all made of insulating material.

5. A valve seat high-frequency quenching induction coil for short circuit prevention according to claim 1, characterized in that; The central positioning mechanism (2) includes a connecting plate (21) and a positioning post (213). The connecting plate (21) has several guide grooves (26). Each guide groove (26) has a spring telescopic rod (22) at its end. The output end of the spring telescopic rod (22) is connected to the positioning post (213). The positioning post (213) passes through the guide groove (26) and is located below the connecting plate (21). The connecting plate (21) has a connecting groove (211) at its center. A detection ball (29) is placed inside the connecting groove (211). An annular sleeve (210) is placed outside the detection ball (29). A fitting sleeve (212) is provided above the detection ball (29), the fitting sleeve (212) is connected to the connecting groove (211), a squeezing column (214) is provided below the detection ball (29), a compression connecting fitting plate (25) is connected to the bottom end of the squeezing column (214), a fitting box (24) is provided above the detection ball (29), the fitting box (24) is cylindrical, a movable bottom plate (28) is provided at the bottom of the fitting box (24), the movable bottom plate (28) is connected to the inner wall of the fitting box (24) by a reset spring (27), and a connecting pipe (23) is provided between the fitting box (24) and the spring telescopic rod (22).

6. A valve seat high-frequency quenching induction coil for short circuit prevention according to claim 5, characterized in that; The connecting groove (211) is spherical, and the inner diameter of the connecting groove (211) is much larger than the outer diameter of the detection ball (29).

7. A short-circuit-proof valve seat high-frequency quenching induction coil according to claim 5, characterized in that; The outer end of the upper surface of the annular sleeve (210) is designed with an arc surface, and the outer end of the lower surface of the mating sleeve (212) is designed with an arc surface.

8. A short-circuit-proof valve seat high-frequency quenching induction coil according to claim 5, characterized in that; The extrusion column (214), the connecting groove (211), and the mating box (24) are on the same center line.

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