Quick liquid discharge structure of heat treatment cooling device

Abstract

The utility model provides a kind of quick liquid discharge structure of heat treatment cooling device belongs to heat treatment cooling device technical field, the quick liquid discharge structure of this heat treatment cooling device includes discharge cylinder and discharge valve body, the discharge cylinder is cylindrical barrel structure, the bottom center position of the discharge cylinder is equipped with discharge through-hole, the discharge valve body is arranged in the bottom of the discharge cylinder, the discharge valve body includes valve seat and valve core, the valve seat is fixedly connected in the bottom outer side of the discharge cylinder, the geometric center of the valve seat is equipped with through hole and the discharge through-hole coaxial corresponding, the valve core is inserted into the through hole and with the inner wall of the through hole sliding fit, the upper end surface of the valve core is conical sealing surface, the lower edge of the discharge through-hole forms annular sealing step matched with the conical sealing surface, the utility model can solve the technical problem that existing heat treatment cooling device exists slow discharge speed and unreliable sealing when discharging coolant.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat treatment cooling devices, and more specifically, it relates to a rapid liquid drainage structure for a heat treatment cooling device. Background Technology

[0002] In heat treatment processes, cooling devices are crucial equipment, used to rapidly cool workpieces after heat treatment to the required temperature. Cooling devices typically employ liquid cooling, immersing the workpieces in coolant within a cooling cylinder. After cooling a batch of workpieces, the coolant in the cooling cylinder needs to be drained for equipment cleaning or replacement with new coolant. Existing cooling devices generally employ a simple drain valve structure at the bottom. This drain valve typically consists of a valve body and a flat valve core, with the drain hole opened and closed manually by rotating or pushing the valve core. However, this traditional drain structure has revealed several shortcomings in practical use. Firstly, the coolant tends to flow during the draining process... The operation speed is relatively slow. Due to the smooth inner wall of the cooling cylinder and the certain viscosity of the coolant, the natural flow of the liquid under gravity is hindered by both the friction of the cylinder wall and the viscosity of the liquid inside, resulting in excessively long drainage time and seriously affecting production efficiency. Secondly, the sealing performance is unreliable. The traditional flat valve core and valve seat use a planar contact seal. Under the long-term immersion in high-temperature coolant and frequent opening and closing, the sealing surface is prone to wear and deformation, resulting in coolant leakage even after the valve is closed. This not only wastes coolant but also pollutes the workshop environment. In addition, the operating mechanism of the traditional drain valve is not ergonomically designed. Operators need to apply a lot of force when opening or closing the valve, and are prone to operational errors due to hand slippage. Utility Model Content

[0003] In view of this, the present invention provides a rapid liquid discharge structure for a heat treatment cooling device, which can solve the technical problems of slow liquid discharge speed and unreliable sealing in existing heat treatment cooling devices.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a rapid drainage structure for a heat treatment cooling device, including a drainage cylinder and a drainage valve body. The drainage cylinder is a cylindrical structure with a drainage through hole at the center of its bottom. The drainage valve body is located at the bottom of the drainage cylinder and includes a valve seat and a valve core. The valve seat is fixedly connected to the outer side of the bottom of the drainage cylinder. A through hole is formed at the geometric center of the valve seat, coaxially corresponding to the drainage through hole. The valve core passes through the through hole and slides against the inner wall of the through hole. The upper end face of the valve core is a conical sealing surface, and the lower edge of the drainage through hole forms an annular sealing step that matches the conical sealing surface. The lower end of the valve core extends to the outer side of the valve seat and is provided with a drive rod. The axial length of the drive rod is greater than the height of the valve seat.

[0006] The technical advantages of the rapid drainage structure of the heat treatment cooling device provided by this utility model are as follows: By setting a drainage valve body at the bottom of the drainage cylinder, the conical sealing surface of the valve core and the annular sealing step at the lower edge of the drainage hole form a precisely matched sealing structure. When the valve core moves upward, the conical sealing surface and the annular sealing step quickly separate to form a drainage channel. When the valve core is pressed down, the conical sealing surface and the annular sealing step fit tightly together to achieve rapid sealing. The drive rod extends to the outside of the valve seat, which makes it easy for the operator to directly apply push and pull force to control the up and down movement of the valve core. The overall structure is simple, reliable and easy to operate, effectively realizing the dual functional requirements of rapid drainage and reliable sealing of heat treatment coolant.

[0007] Based on the above technical solution, the rapid liquid drainage structure of the heat treatment cooling device of this utility model can be further improved as follows:

[0008] The cone angle of the conical sealing surface is 30°~45°, and the inclination angle of the annular sealing step corresponds to the cone angle of the conical sealing surface.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by limiting the cone angle of the conical sealing surface to the range of 30°~45°, the valve core can form a self-locking effect in the closed state. The radial component force generated by the pressure of the coolant acting on the conical sealing surface presses the valve core tightly onto the annular sealing step, which enhances the reliability of the seal. At the same time, this cone angle range also ensures that the driving force required for the valve core to open is moderate, avoiding the problems of the self-locking being too tight and difficult to open due to the cone angle being too small or the sealing effect being poor due to the cone angle being too large.

[0010] Furthermore, the inner wall surface of the drain cylinder is provided with a spiral guide groove, which extends spirally downward from the upper end of the drain cylinder to the surrounding area of ​​the drain hole.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting a spiral guide groove on the inner wall of the drain cylinder that spirals downward from the top to the area around the drain hole, the coolant moves downward in a spiral motion along the spiral guide groove under the action of gravity. This spiral flow method increases the flow speed of the liquid and reduces the frictional resistance between the liquid and the cylinder wall. At the same time, the spiral guide groove guides the liquid to flow in a concentrated manner to the area around the drain hole, avoiding the formation of a stagnant area at the bottom of the drain cylinder, which significantly improves the speed and thoroughness of the draining.

[0012] Furthermore, three axial guide ribs are provided on the outer circumferential surface of the valve core. The three axial guide ribs are distributed at equal angles along the circumferential direction of the valve core, and each axial guide rib slides in contact with the inner wall surface of the through hole.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By setting three axial guide ribs at equal angles along the circumferential direction on the outer circumferential surface of the valve core, the valve core can maintain good coaxiality when moving up and down in the through hole. The sliding contact between the three axial guide ribs and the inner wall of the through hole forms a stable three-point support structure, which effectively prevents the valve core from deflecting or getting stuck during the movement. At the same time, the gap between the axial guide ribs forms a liquid flow channel, which will not hinder the normal discharge of coolant, ensuring smooth drainage and reliable valve core operation.

[0014] Furthermore, the depth of the spiral guide groove gradually increases along the spiral direction, and the depth of the spiral guide groove located at the upper end of the drain cylinder is less than the depth of the spiral guide groove located around the drain through hole.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the groove depth of the spiral guide groove gradually increase along the spiral direction, the coolant can be gradually accelerated during the spiral descent. The shallower groove depth at the upper end of the drain cylinder facilitates the entry of liquid into the guide groove, while the deeper groove depth around the drain hole can accommodate more liquid and provide a larger flow space. This gradual groove depth design conforms to the natural acceleration law of liquid under the action of gravity, effectively avoiding turbulence and splashing phenomena during liquid flow, and further improving the efficiency and stability of draining.

[0016] Furthermore, an operating disc is provided at the lower end of the drive rod. The diameter of the operating disc is larger than that of the drive rod, and the edge of the operating disc is provided with multiple radially extending anti-slip teeth.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By setting an operating disc with a diameter larger than that of the drive rod at the lower end of the drive rod, and setting multiple radially extending anti-slip teeth on the edge of the operating disc, the operator can easily hold the operating disc and apply upward or downward operating force. The larger diameter of the operating disc provides sufficient force-bearing area, and the anti-slip teeth increase the friction between the fingers and the operating disc, so that the operator can hold it firmly even when the operator's hands are contaminated with coolant or oil, effectively avoiding slippage during operation and improving the safety and accuracy of operation.

[0018] Furthermore, the outer wall surface of the valve seat is connected to the bottom outer surface of the drain cylinder by a plurality of reinforcing ribs. The reinforcing ribs are evenly distributed along the circumference of the valve seat, and each reinforcing rib has a triangular plate-like structure.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By connecting multiple reinforcing ribs with triangular plate-like structures evenly distributed along the circumference of the valve seat between the outer wall of the valve seat and the outer surface of the bottom of the drain cylinder, a stable structural support system is formed between the valve seat and the drain cylinder. The reinforcing ribs with triangular plate-like structures have good bending stiffness and can effectively withstand the force generated by the coolant pressure on the valve seat, preventing the valve seat from deforming or loosening during long-term use. At the same time, the even distribution of the reinforcing ribs ensures the balance of force and improves the mechanical strength and service life of the entire drain structure.

[0020] Furthermore, the drain cylinder is made of heat-resistant stainless steel, the valve core is made of wear-resistant ceramic material, and the valve seat is made of cast aluminum alloy.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by selecting heat-resistant stainless steel as the material for the drain cylinder, wear-resistant ceramic material as the material for the valve core, and cast aluminum alloy as the material for the valve seat, each component can adapt to the working environment requirements of the heat treatment cooling device. Heat-resistant stainless steel ensures that the drain cylinder does not deform or corrode under the action of high-temperature coolant. Wear-resistant ceramic material ensures that the valve core maintains good sealing performance and a long service life during frequent opening and closing. Cast aluminum alloy has good casting performance and sufficient strength, making it easy to process a precise through-hole structure. The reasonable combination of the three materials achieves an optimized balance between performance and cost.

[0022] Furthermore, the wall thickness of the drain cylinder is uniformly distributed along the axial direction, and the upper port edge of the drain cylinder is turned outward to form a mounting flange, on which a plurality of mounting holes are uniformly distributed.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the wall thickness of the drain cylinder uniformly distributed along the axial direction, and forming a mounting flange with multiple mounting holes evenly distributed on the outward flange at the upper end edge of the drain cylinder, the drain cylinder has uniform mechanical strength and good installation performance. The uniform wall thickness avoids stress concentration, the outward flange provides sufficient installation connection area, and the even distribution of multiple mounting holes ensures the balance of installation force, making it easy to firmly install the drain cylinder at the bottom of the heat treatment cooling device, thereby improving the stability and maintainability of the overall structure.

[0024] Furthermore, the fitting clearance between the valve core and the through hole is 0.1mm to 0.3mm, the radial height of the axial guide rib is 1mm to 2mm, and the spiral flow guide groove has 2 to 4 spiral turns.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by limiting the fit clearance between the valve core and the through hole to 0.1mm~0.3mm, the radial height of the axial guide rib to 1mm~2mm, and the number of spiral turns of the spiral guide groove to 2~4 turns, the fit relationship and structural parameters between various components are optimized. This fit clearance ensures the flexible movement of the valve core and prevents coolant leakage. The height of the guide rib provides effective guidance and support without excessively increasing the movement resistance. The number of spiral turns ensures sufficient flow guidance and avoids the increase in resistance caused by excessive liquid flow. The optimized combination of these parameters significantly improves the overall working performance and reliability of the drainage structure.

[0026] Compared with existing technologies, the beneficial effects of the rapid drainage structure of the heat treatment cooling device provided by this utility model are as follows: This utility model adopts an integrated structure combining a drainage cylinder and a drainage valve body. A spiral guide groove is set on the inner wall of the drainage cylinder to guide the coolant in a spiral flow, significantly improving the liquid flow velocity and reducing flow resistance. This allows the coolant to be discharged quickly in a short time, with a significantly improved drainage efficiency compared to traditional structures. Simultaneously, a sealing structure combining a conical sealing surface and an annular sealing step utilizes coolant pressure to create a self-locking effect, achieving highly reliable sealing performance and effectively solving the problem of poor sealing in traditional drainage structures. The valve core is equipped with a shaft... The guide ribs ensure smooth and reliable opening and closing actions, while the operating panel design at the lower end of the drive rod makes manual operation more convenient and labor-saving. The overall structure uses a reasonable combination of known materials such as heat-resistant stainless steel, wear-resistant ceramic materials, and cast aluminum alloy, ensuring long-term stable operation of the device in a high-temperature coolant environment. The reinforcing ribs enhance the mechanical strength of the structure, and the fitting clearances and structural parameters between various components have been optimized, giving the entire drainage structure advantages such as sensitive action, reliable sealing, convenient operation, and long service life. It fully meets the dual technical requirements of rapid drainage and reliable sealing for heat treatment cooling devices, providing an efficient and reliable technical solution for heat treatment production. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A cross-sectional view of the rapid liquid discharge structure of a heat treatment cooling device;

[0029] Figure 2 A front view of a rapid liquid discharge structure of a heat treatment cooling device;

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 10. Drain cylinder; 20. Drain valve body; 21. Valve seat; 22. Valve core; 23. Conical sealing surface; 30. Drain through hole; 40. Drive rod; 50. Control panel. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0033] like Figure 1-2 The diagram shows an embodiment of a rapid drainage structure for a heat treatment cooling device provided by this utility model. In this embodiment, it includes a drainage cylinder 10 and a drainage valve body 20. The drainage cylinder is a cylindrical structure with a drainage through hole 30 at the center of its bottom. The drainage valve body is located at the bottom of the drainage cylinder and includes a valve seat 21 and a valve core 22. The valve seat is fixedly connected to the outer side of the bottom of the drainage cylinder. A through hole is provided at the geometric center of the valve seat, which is coaxial with the drainage through hole. The valve core passes through the through hole and slides against the inner wall of the through hole. The upper end face of the valve core is a conical sealing surface 23, and the lower edge of the drainage through hole forms an annular sealing step that matches the conical sealing surface. The lower end of the valve core extends to the outer side of the valve seat and is provided with a drive rod 40. The axial length of the drive rod is greater than the height of the valve seat.

[0034] In the above technical solution, the cone angle of the conical sealing surface is 30°~45°, and the inclination angle of the annular sealing step corresponds to the cone angle of the conical sealing surface.

[0035] Furthermore, in the above technical solution, the inner wall surface of the drain cylinder is provided with a spiral guide groove, which extends spirally downward from the upper end of the drain cylinder to the surrounding area of ​​the drain hole.

[0036] Furthermore, in the above technical solution, three axial guide ribs are provided on the outer circumferential surface of the valve core. The three axial guide ribs are distributed at equal angles along the circumferential direction of the valve core, and each axial guide rib slides in contact with the inner wall surface of the through hole.

[0037] Furthermore, in the above technical solution, the depth of the spiral guide groove gradually increases along the spiral direction, and the depth of the spiral guide groove located at the upper end of the drain cylinder is less than the depth of the spiral guide groove located around the drain hole.

[0038] Furthermore, in the above technical solution, an operation disc 50 is provided at the lower end of the drive rod. The diameter of the operation disc is larger than the diameter of the drive rod, and the edge of the operation disc is provided with multiple radially extending anti-slip teeth.

[0039] Furthermore, in the above technical solution, the outer wall surface of the valve seat and the bottom outer surface of the drain cylinder are connected by multiple reinforcing ribs. The reinforcing ribs are evenly distributed along the circumference of the valve seat, and each reinforcing rib has a triangular plate-like structure.

[0040] Furthermore, in the above technical solution, the material of the drain cylinder is heat-resistant stainless steel, the material of the valve core is wear-resistant ceramic material, and the material of the valve seat is cast aluminum alloy.

[0041] Furthermore, in the above technical solution, the wall thickness of the drain cylinder is uniformly distributed along the axial direction, and the upper port edge of the drain cylinder is turned outward to form an installation flange, on which multiple installation holes are uniformly distributed.

[0042] Furthermore, in the above technical solution, the fitting clearance between the valve core and the through hole is 0.1mm~0.3mm, the radial height of the axial guide rib is 1mm~2mm, and the spiral number of the spiral guide groove is 2~4 turns.

[0043] When the coolant needs to be drained after the heat treatment cooling operation, the operator first holds the operating disc at the lower end of the drive rod. The anti-slip serrations on the edge of the operating disc increase the friction between the fingers and the operating disc, making the grip more secure. Then, an upward pulling force is applied to move the drive rod and valve core upward as a whole. The conical sealing surface of the valve core quickly separates from the annular sealing step at the lower edge of the drain hole, and the drain hole immediately opens. Under the action of gravity, the coolant in the drain cylinder spirals downward along the spiral guide groove on the inner wall. The liquid quickly gathers around the drain hole and passes through the drain hole and the through hole of the valve seat. The entire drainage process is fast and thorough. After the coolant is drained, the operator presses down on the control panel to move the drive rod and valve core downwards. The conical sealing surface of the valve core precisely aligns with the annular sealing step to form a seal, completing the closing action of the drain valve. During the movement of the valve core, the three axial guide ribs on the outer circumference of the valve core maintain sliding contact with the inner wall of the through hole, ensuring the smoothness and coaxiality of the valve core movement. The entire operation is simple and quick and does not require any tools. A single person can complete the drainage operation, which significantly improves the working efficiency and operational safety of the heat treatment production line.

[0044] The following is a specific embodiment 1 of this utility model: This embodiment provides a rapid drainage structure for a large heat treatment cooling device. The drainage cylinder is made of 304 stainless steel plate with a thickness of 5mm, rolled and welded. The inner diameter of the drainage cylinder is 600mm, and the height of the cylinder is 800mm. A circular drainage through hole with a diameter of 80mm is laser-cut at the center of the bottom of the drainage cylinder. The lower edge of the drainage through hole is precision-machined to form an annular sealing step with an inclination angle of 35° and a step width of 8mm. A spiral guide groove with a width of 30mm is set on the inner wall of the drainage cylinder by milling. The spiral guide groove spirals down three times in the circumferential direction starting from the top of the drainage cylinder. The groove depth at the top of the drainage cylinder is 5mm, and gradually deepens to 15mm in the area around the drainage through hole along the spiral direction. The bottom of the spiral guide groove is an arc-shaped transition surface with an arc radius of 5mm. The valve seat is cast from ZL101 cast aluminum alloy. It has a cylindrical structure with an outer diameter of 150mm, a height of 100mm, and a wall thickness of 10mm. A 50mm diameter through-hole is precision-machined at the geometric center of the valve seat. The inner wall of the through-hole is finely ground to achieve a surface roughness of Ra0.8um. ​​The valve seat is fixed to the bottom outer side of the drain cylinder by six M10 bolts made of 316 stainless steel. The valve core is made of alumina ceramic material through dry pressing and high-temperature sintering. It has a cylindrical structure with a diameter of 49.8mm, forming a 0.2mm clearance with the inner wall of the through-hole. The upper end of the valve core is precision-machined to form a conical sealing surface with a cone angle of 35° and a surface roughness of Ra0.44um. Three axial guide ribs are evenly distributed along the circumference of the outer circumference of the valve core, with each axial guide rib having a radial height of 1.The valve core is 5mm thick, 8mm wide, and 80mm long. Three axial guide ribs divide the circumference of the valve core into three equal parts. The lower end of the valve core is fixedly connected to a 20mm diameter 304 stainless steel drive rod with adhesive. The drive rod is 150mm long. The lower end of the drive rod is connected by a threaded connection to a disc-shaped operating plate with a diameter of 80mm and a thickness of 10mm. The operating plate is injection molded from reinforced nylon material. The edge of the operating plate has twelve radial anti-slip teeth with a depth of 3mm and a width of 5mm evenly distributed. A reinforcing rib is set at 60-degree angles along the circumference of the valve seat between the outer wall of the valve seat and the bottom outer surface of the drain cylinder, for a total of six reinforcing ribs. Each reinforcing rib is cut from an 8mm thick 304 stainless steel plate into an isosceles triangle with a base length of 100mm and a height of 80mm. The reinforcing ribs are welded to the outer wall of the valve seat and the bottom of the drain cylinder by argon arc welding. The edge is turned outward to form a 40mm wide mounting flange. Eight mounting holes, each 12mm in diameter, are formed at 45° angles along the circumference of the mounting flange. The radial distance from each mounting hole to the center axis of the drain cylinder is 320mm. After the entire drain structure is assembled, the conical sealing surface of the valve core tightly fits the annular sealing step when the valve core is closed. The operator can lift the valve core and open the drain channel by pulling the operating plate upwards with a force of 30N~40N. The coolant is then rapidly discharged along the spiral guide groove at a drainage rate of 150L~200L per minute. To close the drain, the operator can press the operating plate downwards with a pressure of 20N~30N to re-fit the conical sealing surface with the annular sealing step, achieving a seal. After sealing, there is no leakage for 24 hours under 0.5 MPa water pressure. The entire drain structure has significant advantages such as fast drainage speed, reliable sealing performance, and convenient and labor-saving operation.

[0045] The following is another specific embodiment 2 of this utility model: This embodiment 2 is based on embodiment 1, but the number of spiral turns of the spiral guide groove is changed from three to four. At the same time, the maximum groove depth of the spiral guide groove in the area around the drain hole is increased from 15mm to 20mm. This improvement makes the spiral descent path of the coolant in the drain cylinder longer, and the liquid can obtain a more complete acceleration process, further increasing the drain rate to 180L~220L per minute. It is particularly suitable for high viscosity coolants or working conditions that require ultra-fast draining. At the same time, the fitting clearance between the valve core and the through hole is reduced from 0.2mm to 0.1mm. This smaller fitting clearance further improves the reliability of the seal, and can maintain good sealing performance even under higher water pressure of 0.8 MPa. Other structural parameters and material selection are consistent with embodiment 1. This embodiment achieves faster draining speed and higher sealing pressure level through the above improvements, expanding the application scope of this utility model.

[0046] The following is another specific embodiment 3 of this utility model: Embodiment 3 is based on Embodiment 1. In addition to the spiral guide grooves on the inner wall of the drain cylinder, multiple vertical guide grooves are also provided in the cylinder wall area between the spiral guide grooves. The width of the vertical guide grooves is 15mm, and the depth is 3mm. They extend vertically from the upper end of the drain cylinder to the periphery of the drain hole. The distance between two adjacent vertical guide grooves is 80mm. This composite guide structure combining spiral guide grooves and vertical guide grooves allows the coolant to flow spirally along the spiral guide grooves and partially vertically through the vertical guide grooves. The two flow modes work together to form a higher efficiency. An efficient drainage channel network is provided, with a drainage rate of 200L~250L per minute. At the same time, the number of axial guide ribs on the valve core is increased from three to four. The four axial guide ribs are evenly distributed at 90° intervals along the circumference. This four-point support structure has higher stability and guiding accuracy than the three-point support structure, and the movement of the valve core is smoother during the opening and closing process. Other structural parameters and material selection are consistent with those in Example 1. This embodiment achieves ultra-high drainage efficiency and excellent movement stability through the dual improvements of adding vertical guide channels and increasing the number of axial guide ribs. It is particularly suitable for large-scale industrial heat treatment cooling devices with extremely high requirements for drainage speed.

[0047] Specifically, the principle of this invention is as follows: Through a structural innovation involving a spiral guide groove on the inner wall of the drain cylinder, the spiral flow principle from fluid mechanics is utilized. This causes the coolant to no longer undergo a simple vertical downward motion under gravity, but instead spiral downwards along the guide groove. This spiral flow effectively reduces direct friction between the liquid and the cylinder wall. Simultaneously, the centrifugal force generated by the spiral motion throws the liquid towards the cylinder wall and propels it rapidly down the guide groove, significantly increasing the liquid's flow velocity. The design of the spiral guide groove's depth gradually increasing along the spiral direction conforms to the flow law of liquid under gravitational acceleration, further optimizing flow efficiency. Regarding the sealing structure, this invention employs a conical sealing principle that combines a conical sealing surface with an annular sealing step. Compared to traditional planar seals, the conical sealing surface provides a more efficient seal. The seal has a self-locking characteristic. When the coolant applies pressure to the valve core, the radial component of the pressure generated on the conical sealing surface will press the valve core tightly onto the annular sealing step. The greater the liquid pressure, the better the sealing effect. This self-locking sealing structure fundamentally solves the problem of easy leakage of planar seals. The three axial guide ribs with equal angles on the valve core form a stable three-point support structure. Based on geometric principles, the coaxiality of the valve core during the up and down movement is guaranteed, avoiding skew and jamming. The design of the drive rod extending to the outside of the valve seat and setting the operating plate reduces the operating force by using the lever principle. The anti-slip teeth on the edge of the operating plate increase the friction coefficient and improve the reliability of the grip. The entire drainage structure achieves the technical goals of rapid drainage and reliable sealing through the comprehensive application of the above-mentioned multiple technical principles.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rapid drainage structure for a heat treatment cooling device, comprising a drainage cylinder and a drainage valve body, wherein the drainage cylinder is a cylindrical structure, a drainage through hole is provided at the center of the bottom of the drainage cylinder, the drainage valve body is disposed at the bottom of the drainage cylinder, the drainage valve body includes a valve seat and a valve core, the valve seat is fixedly connected to the outer side of the bottom of the drainage cylinder, a through hole is provided at the geometric center of the valve seat coaxially corresponding to the drainage through hole, and the valve core passes through the through hole and slides in cooperation with the inner wall of the through hole, characterized in that... The upper end face of the valve core is a conical sealing surface, and the lower edge of the drain hole forms an annular sealing step that matches the conical sealing surface. The lower end of the valve core extends to the outside of the valve seat and is provided with a drive rod. The axial length of the drive rod is greater than the height of the valve seat.

2. The rapid draining structure of a heat treatment cooling device according to claim 1, characterized in that, The cone angle of the conical sealing surface is 30°~45°, and the inclination angle of the annular sealing step corresponds to the cone angle of the conical sealing surface.

3. The rapid draining structure of a heat treatment cooling device according to claim 2, characterized in that, The inner wall of the drain cylinder is provided with a spiral guide groove, which extends spirally downward from the upper end of the drain cylinder to the surrounding area of ​​the drain hole.

4. The rapid draining structure of a heat treatment cooling device according to claim 3, characterized in that, Three axial guide ribs are provided on the outer circumferential surface of the valve core. The three axial guide ribs are distributed at equal angles along the circumferential direction of the valve core, and each axial guide rib slides in contact with the inner wall surface of the through hole.

5. The rapid draining structure of a heat treatment cooling device according to claim 4, characterized in that, The depth of the spiral guide groove gradually increases along the spiral direction, and the depth of the spiral guide groove located at the upper end of the drain cylinder is less than the depth of the spiral guide groove located around the drain through hole.

6. The rapid draining structure of a heat treatment cooling device according to claim 5, characterized in that, The lower end of the drive rod is provided with an operating disc, the diameter of which is larger than that of the drive rod, and the edge of the operating disc is provided with multiple radially extending anti-slip teeth.

7. The rapid draining structure of a heat treatment cooling device according to claim 6, characterized in that, The outer wall of the valve seat is connected to the bottom outer surface of the drain cylinder by a plurality of reinforcing ribs. The reinforcing ribs are evenly distributed along the circumference of the valve seat, and each reinforcing rib has a triangular plate-like structure.

8. The rapid draining structure of a heat treatment cooling device according to claim 7, characterized in that, The drain cylinder is made of heat-resistant stainless steel, the valve core is made of wear-resistant ceramic material, and the valve seat is made of cast aluminum alloy.

9. The rapid draining structure of a heat treatment cooling device according to claim 8, characterized in that, The wall thickness of the drain cylinder is uniformly distributed along the axial direction, and the upper port edge of the drain cylinder is turned outward to form a mounting flange, on which multiple mounting holes are uniformly distributed.

10. The rapid draining structure of a heat treatment cooling device according to claim 9, characterized in that, The fitting clearance between the valve core and the through hole is 0.1mm to 0.3mm, the radial height of the axial guide rib is 1mm to 2mm, and the spiral flow guide groove has 2 to 4 spiral turns.

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