A hot plate steam rapid drainage device

Abstract

The application discloses a kind of hot plate steam quick drainage device, it is related to vulcanizing machine technical field, including: groove plate, heating groove is opened in the downside of the groove plate, the both ends of the heating groove are equipped with water inlet and drain respectively, and flow limiting structure is fixedly arranged in the drain;Cover plate, the cover plate is attached to the downside of the groove plate and is welded and fixed with the groove plate, the position of the cover plate corresponding the drain is equipped with water collecting hole, and the water collecting hole is communicated with heating groove;The flow limiting structure and water collecting hole cooperate to form self-adapting drainage channel.The application can quickly vertically upwardly discharge cooling water in upper hot plate by increasing flow limiting pipe and water collecting hole in the position of the drain of upper hot plate, and back pressure between water inlet and drain of upper hot plate is increased in the process of heating, so that the steam passing through heating groove stays longer in heating groove, heating is more uniform and sufficient, heat loss is reduced, and heating efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of vulcanizing machine technology, and more specifically to a rapid steam drainage device for hot plates. Background Technology

[0002] Tire molds are key components in the tire vulcanization process, used to completely insert the tire carcass into the mold. The outer surface uses upper and lower heating plates and an internal bladder. High-temperature, high-pressure steam and nitrogen are used to shape and vulcanize the tire carcass. The upper heating plate, as one of the devices for heating the tire mold, only moves vertically up and down during the entire vulcanization process. Furthermore, the high-temperature, high-pressure steam inside the upper heating plate enters and exits vertically above it. If the cooling water accumulated inside the upper heating plate cannot be discharged in time, it will directly affect the heating effect of the upper heating plate on the mold, thus making it impossible to effectively control the quality of the vulcanized tire.

[0003] In existing technologies, traditional upper heating plate structures typically employ direct discharge from large-diameter outlets. After steam enters the heating tank from the inlet, the steam flow rate is relatively high due to the lack of throttling at the outlet, resulting in a short residence time within the heating tank. This leads to insufficient and uneven heating of the upper heating plate, resulting in significant heat loss. Simultaneously, cooling water is discharged via natural flow or a drain valve, which is slow and causes it to stagnate in the heating tank for an extended period. This results in localized temperature drops and large temperature fluctuations on the hot plate, negatively impacting the vulcanization quality. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid steam drainage device for hot plates to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rapid steam drainage device for hot plates, comprising: A trough plate, wherein a heating trough is provided on the lower side of the trough plate, and a water inlet and a water outlet are respectively provided at both ends of the heating trough plate, and a flow limiting structure is fixedly provided in the water outlet plate; A cover plate is attached to the lower side of the groove plate and welded to the groove plate. A water collection hole is provided on the cover plate at the position corresponding to the drain outlet, and the water collection hole is in communication with the heating groove. The flow-limiting structure, in conjunction with the water collection hole, forms an adaptive drainage channel.

[0006] Furthermore, the flow-limiting structure is a flow-limiting pipe, the inner diameter of which is smaller than the inner diameter of the drain outlet, and the bottom surface of which is lower than the bottom surface of the heating tank.

[0007] Furthermore, the central axis of the water collection hole and the central axis of the flow limiting pipe are on the same straight line, the bottom end of the flow limiting pipe extends into the water collection hole, and the diameter of the water collection hole is larger than the outer diameter of the flow limiting pipe.

[0008] Furthermore, the bottom surface of the flow-limiting pipe is 2mm lower than the bottom surface of the heating tank to ensure that the local resistance generated when the steam flow direction changes is sufficient to form an effective back pressure, but not to completely block the steam flow. The bottom surface of the water collection hole is 8mm lower than the bottom surface of the heating tank to ensure that the static pressure generated by the height of the condensate column can overcome the steam back pressure in the flow-limiting pipe and achieve reliable drainage.

[0009] Furthermore, a positioning hole is provided at the inner end of the drain outlet, and the flow-limiting pipe is embedded in the positioning hole and welded in place.

[0010] Furthermore, the channel plate is a circular steel plate, and the cover plate is a circular thin plate adapted to the channel plate. The channel plate and the cover plate are integrally welded to form the hot plate of the vulcanizing machine.

[0011] Furthermore, the flow limiting tube adopts a composite material structure, comprising a tubular carbon steel substrate and a wear-resistant alloy cladding layer, wherein the wear-resistant alloy cladding layer is disposed on the inner wall of the tubular carbon steel substrate.

[0012] Furthermore, the water collection hole is a tapered gradually expanding cavity that is narrower at the top and wider at the bottom. The tapered angle of the tapered gradually expanding cavity is 10° to 20°. The bottom end of the flow limiting tube extends into the upper part of the tapered gradually expanding cavity. The port diameter of the tapered gradually expanding cavity is larger than the diameter of the flow limiting tube. Condensate first accumulates at the bottom. When the liquid level rises and submerges the bottom end of the flow limiting tube, an instantaneous siphon is formed and the condensate is quickly discharged. After the liquid level drops, the drainage automatically stops, realizing pulsed intermittent drainage.

[0013] Furthermore, the inner wall of the flow-limiting tube is provided with a spiral guide groove or an axial guide rib, and the helix angle of the spiral guide groove is 15° to 30°.

[0014] Furthermore, the bottom surface of the heating tank is an inclined surface that slopes towards the drain outlet, and the inclination angle of the inclined surface is 1° to 3°.

[0015] The technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. By installing a flow-limiting pipe inside the drain outlet, with the inner diameter of the flow-limiting pipe being smaller than that of the drain outlet, the steam is throttled when passing through the flow-limiting pipe. This increases the back pressure at the drain outlet, reduces the flow velocity of the steam in the entire heating tank, and allows the steam to stay in the heating tank for a longer time. This enables the latent heat of the steam to be released more fully, resulting in more thorough and uniform heating of the upper heating plate. This greatly improves the heating efficiency of the upper heating plate and reduces heat loss. 2. By adding water collection holes at the corresponding positions of the flow-limiting pipe on the cover plate, the cooling water naturally gathers towards the water collection holes due to their low position and gravity. At the same time, the steam flow drives the cooling water towards the water collection holes, achieving rapid concentration of cooling water. The cooling water is then quickly discharged vertically upwards through the flow-limiting pipe. The drainage speed can be automatically adjusted according to the water level: when there is more cooling water and the water level is higher, the static pressure increases, and the drainage speed automatically increases; when there is less cooling water and the water level is lower, the drainage speed decreases accordingly, but it can still be discharged continuously, ensuring that cooling water does not accumulate in the heating tank. 3. The integrated drainage device has a simple and efficient structure, does not affect the external dimensions of the upper heating plate, has low cost, requires no external power source, and has extremely low maintenance requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the invention; Figure 2 This is a schematic diagram of the drain outlet of the present invention; Figure 3 This is a schematic diagram of the water inlet of the present invention; Figure 4 This is a schematic diagram of the water inlet in Embodiment 3 of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Slot plate; 2. Flow limiting pipe; 3. Water collection hole; 4. Cover plate; 5. Heating tank; 6. Water inlet; 7. Drain outlet Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1: The present invention provides, as follows Figures 1 to 3 The hot plate steam rapid drainage device shown includes: The groove plate 1 and the cover plate 4 are a circular steel plate and a circular thin plate adapted to the groove plate 1. The cover plate 4 is attached to the lower side of the groove plate 1 and is welded together with the groove plate 1 to form the upper heating plate of the vulcanizing machine.

[0021] A heating groove 5 is provided on the lower side of the groove plate 1. The direction of the heating groove 5 can be designed as a snake, ring or other suitable shape according to the heating requirements of the hot plate, so as to ensure that the steam can flow evenly across the entire lower side of the hot plate and heat the tire mold evenly.

[0022] The heating tank 5 has an inlet 6 and a drain 7 at both ends, and a flow-limiting structure is fixedly installed inside the drain 7.

[0023] A water collection hole 3 is provided on the cover plate 4 at the position corresponding to the drain outlet 7, and the water collection hole 3 is connected to the heating tank 5. The flow limiting structure and the water collection hole 3 work together to form an adaptive drainage channel.

[0024] The flow-limiting structure is a flow-limiting pipe 2. A positioning hole is opened at the inner end of the drain outlet 7. The flow-limiting pipe 2 is embedded in the positioning hole and welded and fixed.

[0025] The central axis of the water collection hole 3 and the central axis of the flow limiting pipe 2 are on the same straight line.

[0026] The inner diameter of the flow-limiting pipe 2 is smaller than that of the drain outlet 7, causing a throttling effect on the steam as it passes through the flow-limiting pipe 2. According to fluid mechanics principles, when fluid passes through a pipe with a narrowed cross-section, the flow velocity increases, but at the same time, local resistance is formed at the narrowed diameter, resulting in increased back pressure at the drain outlet. Due to the increased back pressure, the steam flow velocity decreases throughout the heating tank 5, and the steam stays in the heating tank 5 for a longer time, thus allowing the latent heat of the steam to be released more fully, resulting in more thorough and uniform heating of the upper heating plate.

[0027] The bottom end of the flow-limiting pipe 2 extends into the water collection hole 3, which is cylindrical and has a diameter larger than the outer diameter of the flow-limiting pipe 2. The bottom surface of the flow-limiting pipe 2 is 2mm lower than the bottom surface of the heating tank 5. This changes the original direct upward discharge of steam when it passes through the drain outlet 7, requiring it to first change direction downward before being discharged upward. This change in direction increases the local resistance loss of the steam flow and also increases the back pressure and restricts the flow. Together with the throttling effect, this further prolongs the residence time of the steam in the heating tank 5.

[0028] The water collection hole 3 is located at the bottom of the drain outlet 7. The bottom surface of the water collection hole 3 is 8mm lower than the bottom surface of the heating tank 5. Because the water collection hole 3 is at a low position, the cooling water naturally gathers towards the water collection hole 3 under the action of gravity. At the same time, the steam flow drives the cooling water to move towards the water collection hole 3, thus realizing the rapid concentration of cooling water.

[0029] After being collected through the water collection hole 3, the cooling water is quickly and vertically discharged upwards through the flow limiting pipe 2. The drainage speed can be automatically adjusted according to the water level: when there is more cooling water and the water level is higher, the static pressure increases and the drainage speed automatically increases; when there is less cooling water and the water level is lower, the drainage speed decreases accordingly, but it can still be discharged continuously to ensure that cooling water does not accumulate in the heating tank 5.

[0030] Because the cooling water can be drained quickly and completely, the hot plate will not experience localized temperature drops due to cooling water retention during the heating process, thus significantly improving the temperature stability of the hot plate.

[0031] Example 2: In this example, the basic structure of the trough plate 1, cover plate 4, and water collection hole 3 is the same as in Example 1, except that: The flow restrictor 2 adopts a composite material structure, consisting of a tubular carbon steel substrate and a wear-resistant alloy cladding layer, with the wear-resistant alloy cladding layer set on the inner wall of the tubular carbon steel substrate.

[0032] The carbon steel base material is Q345R pressure vessel steel, and the wear-resistant alloy cladding layer material is nickel-based alloy with a cladding layer thickness of 0.5-1mm. Through laser cladding process, it is metallurgically combined with the carbon steel base material, which makes the flow limiting tube 2 have excellent high temperature resistance, steam erosion resistance and cavitation resistance, ensuring that the inner diameter of the flow limiting tube 2 remains stable and does not deform over a long period of time.

[0033] Example 3: Figure 4 In this embodiment, the basic structure of the trough plate 1 and the flow-limiting pipe 2 is the same as that in Embodiment 1, except that: The water collection hole 3 is a tapered gradually expanding cavity that is narrow at the top and wide at the bottom. The cone angle of the tapered gradually expanding cavity is 10° to 20°. The bottom end of the flow limiting tube 2 extends into the upper part of the tapered gradually expanding cavity. The port diameter of the tapered gradually expanding cavity is larger than the diameter of the flow limiting tube 2.

[0034] The condensate first accumulates at the bottom of the conical expanding chamber, and the liquid level gradually rises. When the liquid level submerges the bottom of the flow limiting tube 2, the static pressure of the liquid column and the pressure difference of the steam form an instantaneous siphon, and the condensate is quickly discharged vertically. After the liquid level drops, the bottom of the flow limiting tube 2 is exposed to the steam again, and the drainage stops automatically, realizing pulsed intermittent drainage and preventing steam from continuously escaping from the drain outlet.

[0035] Example 4: In this example, the basic structure of the trough plate 1 and the flow limiting tube 2 is the same as in Example 1, except that: The inner wall of the flow restrictor 2 is provided with a spiral guide groove or axial guide rib. The rise angle of the spiral guide groove is 15° to 30°, which is used to guide the condensate to rise along the pipe wall and prevent steam from directly scouring the liquid surface.

[0036] Condensate, due to its high density and low inertia, spirals upward along the pipe wall under the guidance of the spiral groove, while steam, due to its low density and high inertia, is discharged directly from the center of the pipe.

[0037] Example 5: In this example, the basic structure of the flow-limiting pipe 2, the cover plate 4, and the water collection hole 3 is the same as in Example 1, except that: The bottom surface of the heating tank 5 is an inclined surface that slopes towards the drain outlet 7, and the inclination angle of the inclined surface is 1° to 3°.

[0038] Specifically, with the inlet 6 end of the heating tank 5 as the high point and the outlet 7 end as the low point, the bottom surface of the entire heating tank 5 is continuously inclined along the direction of steam flow. The water collection hole 3 is located at the lowest point of the heating tank 5. During the steam flow, the condensate generated after the steam exchanges heat with the tank wall adheres to the bottom of the tank. The inclined bottom surface provides an additional gravitational force for the condensate, which significantly accelerates the flow speed of the condensate towards the water collection hole 3 and the outlet 7.

[0039] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rapid steam drainage device for hot plates, characterized in that, include: A trough plate (1) is provided with a heating trough (5) on the lower side surface of the trough plate (1). The two ends of the heating trough (5) are respectively provided with a water inlet (6) and a drain outlet (7). A flow-limiting structure is fixedly provided in the drain outlet (7). Cover plate (4), the cover plate (4) is attached to the lower side of the groove plate (1) and welded to the groove plate (1). A water collection hole (3) is provided on the cover plate (4) at the position corresponding to the drain outlet (7). The water collection hole (3) is connected to the heating groove (5). The flow-limiting structure, together with the water collection hole (3), forms an adaptive drainage channel.

2. The hot plate steam rapid drainage device according to claim 1, characterized in that: The flow-limiting structure is a flow-limiting pipe (2), the inner diameter of the flow-limiting pipe (2) is smaller than the inner diameter of the drain outlet (7), and the bottom surface of the flow-limiting pipe (2) is lower than the bottom surface of the heating tank (5).

3. The hot plate steam rapid drainage device according to claim 2, characterized in that: The central axis of the water collection hole (3) and the central axis of the flow limiting pipe (2) are on the same straight line. The bottom end of the flow limiting pipe (2) extends into the water collection hole (3). The diameter of the water collection hole (3) is larger than the outer diameter of the flow limiting pipe (2).

4. A rapid steam drainage device for hot plates according to claim 2, characterized in that: The bottom surface of the flow limiting pipe (2) is 2mm lower than the bottom surface of the heating tank (5), and the bottom surface of the water collection hole (3) is 8mm lower than the bottom surface of the heating tank (5).

5. A rapid steam drainage device for hot plates according to claim 2, characterized in that: The inner end of the drain outlet (7) is provided with a positioning hole, and the flow limiting pipe (2) is embedded in the positioning hole and welded and fixed.

6. The hot plate steam rapid drainage device according to claim 1, characterized in that: The groove plate (1) is a circular steel plate, and the cover plate (4) is a circular thin plate adapted to the groove plate (1). The groove plate (1) and the cover plate (4) are integrally welded to form the hot plate of the vulcanizing machine.

7. A rapid steam drainage device for hot plates according to claim 2, characterized in that: The flow limiting tube (2) adopts a composite material structure. The flow limiting tube (2) includes a tubular carbon steel substrate and a wear-resistant alloy cladding layer. The wear-resistant alloy cladding layer is disposed on the inner wall of the tubular carbon steel substrate.

8. A rapid steam drainage device for hot plates according to claim 2, characterized in that: The water collection hole (3) is a tapered gradually expanding cavity that is narrow at the top and wide at the bottom. The cone angle of the tapered gradually expanding cavity is 10° to 20°. The bottom end of the flow limiting tube (2) extends into the upper part of the tapered gradually expanding cavity. The port diameter of the tapered gradually expanding cavity is larger than the diameter of the flow limiting tube (2).

9. A rapid steam drainage device for hot plates according to claim 2, characterized in that: The inner wall of the flow-limiting tube (2) is provided with a spiral guide groove or an axial guide rib, and the helix angle of the spiral guide groove is 15° to 30°.

10. A rapid steam drainage device for hot plates according to claim 1, characterized in that: The bottom surface of the heating tank (5) is an inclined surface that slopes toward the drain outlet (7), and the inclination angle of the inclined surface is 1° to 3°.

Images