Negative pressure water tank for profile extrusion molding

Abstract

The negative-pressure water tank comprises a cooling water tank, a sealing cover is hinged to one side of the cooling water tank, a locking structure is arranged between the cooling water tank and the sealing cover, two first partition plates are installed in the cooling water tank, and the cooling water tank is divided into a negative-pressure cavity and isolation cavities located on the two sides of the negative-pressure cavity by the first partition plates; a plurality of connecting holes and a water level meter are arranged at the positions, corresponding to the negative pressure cavity, of the sealing cover, negative pressure pipes are connected to the connecting holes, a second partition plate is installed in the isolation cavity, reducer pipes are detachably arranged on the side walls of the two ends of the cooling water tank and in channel openings of the first partition plate and the second partition plate, and a water spraying pipe is arranged on the side wall of the cooling water tank. According to the cooling water tank, the multi-cavity isolation mode is adopted, the reducer pipe matched with the cross section of the profile is matched, the loss of negative pressure can be reduced, the good sealing and pressure maintaining effect is achieved, the negative pressure in the cooling water tank is monitored in the mode of controlling and monitoring the water level, the negative pressure in the cooling water tank is in a visible state, and monitoring is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of profile production, in particular to a negative pressure water tank for profile extrusion molding. Background Art

[0002] Water cooling the profile at the discharging end can accelerate the curing process of the PVC material, enabling it to reach a stable shape and size in a short time, ensuring that the profile meets the product requirements. Moreover, through water cooling, the cooling speed of the profile is relatively fast, which helps to reduce the internal stress caused by uneven cooling, reduce the risks of profile warping, bending and shrinking, maintain its dimensional stability, improve production efficiency, and reduce production costs.

[0003] During the cooling process, it is found that due to thermal expansion and contraction, some profiles will undergo a certain amount of concave deformation. Therefore, a certain external force needs to be applied. The negative pressure value required for the profile to be formed in the water tank needs to be stably maintained. During the pipe processing process, the commonly used method is to use negative pressure. However, different from pipes, the cross-section of profiles is not fixed, resulting in poor sealing in the water cooling tank. Only by applying a larger negative pressure can the negative pressure requirements in the water cooling tank be met, which increases the equipment power and makes it difficult to monitor the internal pressure. For this reason, we propose a negative pressure water tank for profile extrusion molding to solve the above problems. Summary of the Utility Model

[0004] This application provides a negative pressure water tank for profile extrusion molding, which solves the problems of high negative pressure power and difficult monitoring of negative pressure during the water cooling process of profiles.

[0005] This application provides a negative pressure water tank for profile extrusion molding, including a cooling water tank. One side of the cooling water tank is hinged with a cover, and a locking structure is arranged between the cooling water tank and the cover. Two first partitions are installed in the cooling water tank, and the first partitions divide the cooling water tank into a negative pressure chamber and isolation chambers on both sides of the negative pressure chamber. The cover is provided with a plurality of connection holes and a water level gauge at the corresponding position of the negative pressure chamber. A negative pressure pipe is connected to the connection holes. A second partition is installed in the isolation chamber. Reducing diameter pipes are detachably installed at the channel openings of the side walls at both ends of the cooling water tank, the first partitions and the second partitions. A water spraying pipe is arranged on the side wall of the cooling water tank. A water replenishing pipe is arranged in the negative pressure chamber. A circulating water tank is installed at the bottom of the cooling water tank. Water pipes are installed at the bottoms of the negative pressure chamber and the isolation chambers, and the water pipes extend below the liquid level of the circulating water tank.

[0006] Preferably, the reducing diameter pipe includes a fixing plate and a shaped pipe connected to the fixing plate, and the fixing plate is fixed on the cooling water tank, the first partitions and the second partitions through fixing screws.

[0007] Preferably, the reducing diameter pipe is made of stainless steel.

[0008] Preferably, an observation window is provided on the side wall of the cooling water tank.

[0009] Preferably, a sealing strip corresponding to the first partition board and the second partition board is provided on the cover.

[0010] Preferably, there are two second partition boards on the same side.

[0011] Preferably, a water level scale is further provided in the negative pressure chamber.

[0012] As can be seen from the above technical solutions, the present application provides a negative pressure water tank for profile extrusion molding. When the present application is in use, first prepare a reducing pipe according to profiles of different sizes so that the reducing pipe matches the size of the profile to reduce the connection area between the negative pressure chamber and the isolation chamber. After the profile passes through the cooling water tank, the first partition board and the second partition board in sequence, close the cover, and then turn on the water spray pipe for cooling. When the water level in the negative pressure chamber rises, open the negative pressure pipe so that the negative pressure chamber is in a negative pressure state. At the same time, affected by the negative pressure, the water level in the negative pressure chamber rises. Control the negative pressure value in the negative pressure chamber through the height range of the water level gauge. Through the blockage of the second partition boards layer by layer, the amount of air entering the negative pressure chamber from the negative pressure gas can be effectively reduced. At the same time, a negative pressure area can also be formed in the isolation chamber, making the negative pressure in the entire cooling water tank in a stepped shape. The water entering the circulation water tank through the water pipe can be continuously used as long as the water pipe is located below the liquid level.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. Through the setting of the negative pressure pipe and the water level gauge, the height of the water level can be monitored by the water level gauge to monitor the negative pressure situation, changing the original negative pressure control to water level control, which is not only convenient for adjustment but also easy for visual observation;

[0015] 2. Through the setting of the first partition board and the second partition board, a stepped seal can be formed, which can reduce gas leakage and further reduce the operating power of the negative pressure;

[0016] 3. Through the setting of the reducing pipe, according to the shape of the profile, a pipe diameter similar to the cross-section of the profile is manufactured, which can reduce the area of gas flow and further reduce the loss of negative pressure.

[0017] In summary, the present application can reduce the loss of negative pressure, play a good role in sealing and pressure maintaining through the multi-chamber isolation method and in combination with a reducing pipe adapted to the cross-section of the profile, and monitor the negative pressure in the cooling water tank by controlling and monitoring the water level, making the negative pressure in the cooling water tank in a visible state, which is convenient for control and monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solution of the present application, the following will briefly introduce the drawings required in the implementation cases. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Internal structure schematic diagram of a negative pressure water tank for profile extrusion molding proposed by the present utility model;

[0020] Figure 2 External structure schematic diagram of a negative pressure water tank for profile extrusion molding proposed by the present utility model;

[0021] Figure 3 Cover structure schematic diagram of a negative pressure water tank for profile extrusion molding proposed by the present utility model;

[0022] Figure 4 Enlarged view of the structure at position A of a negative pressure water tank for profile extrusion molding proposed by the present utility model;

[0023] Figure 5 Schematic diagram of the variable diameter pipe structure of a negative pressure water tank for profile extrusion molding proposed by the present utility model.

[0024] In the figure: 1 cooling water tank, 2 circulating water tank, 3 water pipe, 4 first partition, 5 shaped pipe, 6 negative pressure pipe, 7 water spray pipe, 8 connection hole, 9 water level gauge, 10 cover, 11 second partition, 12 fixing screw, 13 fixing plate, 14 observation window, 15 sealing strip. Specific implementation manners

[0025] In order to enable those skilled in the art of this technology to better understand the technical solution in the present application, the following will clearly and completely describe the technical solution in the embodiments of the present application in conjunction with the drawings.

[0026] See Figures 1-5, a negative pressure water tank for profile extrusion molding. In this application, the cooling water tank 1 is modified to facilitate visual inspection of the pressure condition and reduce the negative pressure power. Specifically, it includes a cooling water tank 1, and a cover 10 is hinged on one side of the cooling water tank 1. It should be understood that after the cover 10 and the cooling water tank 1 are closed, they are sealed. Sealing is an existing technology. For specific reference, the sealed hatch can be referred to and will not be described in detail here. A locking structure is provided between the cooling water tank 1 and the cover 10, and the locking can adopt the locking method of a pressure vessel. Two first partitions 4 are installed in the cooling water tank 1 to divide the cooling water tank 1 into regions to achieve the purpose of multi-layer blocking. The first partition 4 divides the cooling water tank 1 into a negative pressure chamber and isolation chambers on both sides of the negative pressure chamber. The negative pressure chamber is used to provide a negative pressure state in the cooling water tank 1, and the isolation chambers are used to reduce negative pressure loss. A cover 10 is provided with a plurality of connection holes 8 and a water level gauge 9 at the corresponding position of the negative pressure chamber. The water level gauge 9 is used to monitor the water level in the negative pressure chamber. The water level gauge 9 is in electronic form and is used to collect the water level height. A negative pressure pipe 6 is connected to the connection hole 8, and the negative pressure chamber is pumped to a negative pressure through the negative pressure pipe 6. During specific operation, the maximum value and the minimum value of the water level gauge 9 are set, and the minimum value and the maximum value of the operating power of the negative pressure pipe 6 connected to the negative pressure device are adjusted. When the water level drops, the negative pressure power can be increased. When the water level is higher than the set value, the negative pressure power is reduced. When the switching time between the maximum value and the minimum value of the adjusted negative pressure power is greater than the set value, the adjustment can be stopped and the operation can be carried out to stably ensure the negative pressure in the negative pressure chamber;

[0027] Second partitions 11 are installed in the isolation chambers. Specifically, two second partitions 11 on the same side can be provided, that is, the isolation chamber is divided into three sections for multiple barriers, which can reduce the negative pressure loss per unit time, thereby facilitating the control of the negative pressure in the negative pressure chamber. Further, variable diameter pipes are detachably installed at the channel openings of the two end side walls of the cooling water tank 1, the first partition 4, and the second partition 11. The variable diameter pipes are installed on the channels through which the profiles pass. Specifically, the variable diameter pipes and the profiles being processed are similar in cross-section, so as to reduce the gap between the profiles and the channels and further increase the resistance to negative pressure loss;

[0028] A water spray pipe 7 is provided on the side wall of the cooling water tank 1, and a plurality of water spray nozzles are provided on the water spray pipe 7. The water spray nozzles spray water along the moving track of the profiles. When setting, the water spray pipe 7 can be provided with two, one on the upper and one on the lower, and a total of four are provided on both sides, which can spray water to cool the profiles in a 360° non-dead angle manner. At the same time, a water supply pipe is provided in the negative pressure chamber. The water supply pipe is installed between the two water spray pipes 7 and is mainly used to control the water level in the negative pressure bin. In the initial stage, it can quickly assist in adding water to the negative pressure chamber to improve the water addition efficiency;

[0029] A circulation water tank 2 is installed at the bottom of the cooling water tank 1 for receiving the water discharged from the cooling water tank 1 for reuse. Under negative pressure, water pipes 3 are installed at the bottoms of the negative pressure chamber and the isolation chamber. The water pipes 3 extend below the liquid level of the circulation water tank 2. The water in the circulation water tank 2 can also block the water pipes 3 to reduce the loss of negative pressure in the cooling water tank 1. The circulation water tank 2, the water pipes 3 and the negative pressure chamber together form a negative pressure system for water level control.

[0030] In the present utility model, the reducing pipe includes a fixing plate 13 and a shaped pipe 5 connected to the fixing plate 13. The cross-section of the middle channel of the shaped pipe 5 is similar to the cross-section of the profile. When the profile passes through, the gaps between various spaces can be effectively reduced, thereby reducing the negative pressure loss. The fixing plate 13 is fixed to the cooling water tank 1, the first partition plate 4 and the second partition plate 11 by fixing screws 12. Different reducing pipes are replaced according to different profiles. The setting of the reducing pipe can transform the permeability of the original channel. The reducing pipe is made of stainless steel to avoid the influence of rust on the shaped pipe 5 on the profile production.

[0031] In some embodiments, in order to further improve the observation effect, an observation window 14 is provided on the side wall of the cooling water tank 1. The observation window 14 is made of glass or acrylic plate, and the water level in the cooling water tank can be observed through the observation window 14.

[0032] In some embodiments, in order to improve the sealing performance of each chamber, a sealing strip 15 corresponding to the first partition plate 4 and the second partition plate 11 is provided on the cover 10. After the cover 10 is closed, the sealing strip 15 abuts against the first partition plate 4 and the second partition plate 11 to seal each chamber and reduce the permeability between the chambers.

[0033] In some embodiments, a water level scale is further provided in the negative pressure chamber. By setting the water level scale, on-site reading can be carried out more accurately.

[0034] As can be seen from the above technical solutions, when in use, when this application is in use, first prepare a reducing pipe according to profiles of different sizes so that the reducing pipe matches the size of the profile to reduce the connection area between the negative pressure chamber and the isolation chamber. After the profile passes through the cooling water tank 1, the first partition plate 4 and the second partition plate 11 in sequence, close the cover 10, and then turn on the water spray pipe 7 for cooling. When the water level in the negative pressure chamber rises, open the negative pressure pipe 6 so that the negative pressure chamber is in a negative pressure state. At the same time, affected by the negative pressure, the water level in the negative pressure chamber rises. The negative pressure value in the negative pressure chamber is controlled through the height range of the water level gauge 9. Through the blocking of the second partition plates 11 layer by layer, the amount of negative pressure gas entering the negative pressure chamber can be effectively reduced, and at the same time, a negative pressure area can also be formed in the isolation chamber, making the negative pressure in the entire cooling water tank 1 in a stepped shape. The water entering the circulation water tank 2 through the water pipe 3 is continuously used, and it is only necessary to ensure that the water pipe 3 is below the liquid level.

[0035] Other embodiments of the present application will be readily contemplated by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only to be considered as exemplary, and the true scope of the present application is pointed out by the claims.

[0036] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The embodiments of the present application described above do not constitute a limitation on the protection scope of the present application.

Claims

1. A negative pressure water tank for profile extrusion molding, comprising a cooling water tank (1), characterized in that: One side of the cooling water tank (1) is hinged with a cover (10). A locking structure is arranged between the cooling water tank (1) and the cover (10). Two first partition plates (4) are installed in the cooling water tank (1). The first partition plates (4) divide the cooling water tank (1) into a negative pressure chamber and isolation chambers on both sides of the negative pressure chamber. A plurality of connection holes (8) and a water level gauge (9) are arranged at corresponding positions of the cover (10) in the negative pressure chamber. A negative pressure pipe (6) is connected to the connection hole (8). A second partition plate (11) is installed in the isolation chamber. Variable diameter pipes are detachably arranged at the passage openings of the side walls at both ends of the cooling water tank (1), the first partition plates (4) and the second partition plates (11). A water spray pipe (7) is arranged on the side wall of the cooling water tank (1). A water replenishing pipe is arranged in the negative pressure chamber. A circulating water tank (2) is installed at the bottom of the cooling water tank (1). Water pipes (3) are installed at the bottoms of the negative pressure chamber and the isolation chambers. The water pipes (3) extend below the liquid level of the circulating water tank (2).

2. The negative pressure water tank for profile extrusion molding according to claim 1, wherein, The variable diameter pipe includes a fixing plate (13) and a shaped pipe (5) connected to the fixing plate (13). The fixing plate (13) is fixed to the cooling water tank (1), the first partition plates (4) and the second partition plates (11) by fixing screws (12).

3. The negative pressure water tank for profile extrusion molding according to claim 2, characterized in that, The variable diameter pipe is made of stainless steel.

4. A negative pressure water tank for profile extrusion molding according to claim 1, characterized in that, An observation window (14) is arranged on the side wall of the cooling water tank (1).

5. The negative pressure water tank for profile extrusion molding according to claim 1, characterized in that, Sealing strips (15) corresponding to the first partition plates (4) and the second partition plates (11) are arranged on the cover (10).

6. The negative pressure water tank for profile extrusion molding according to claim 1, wherein There are two second partition plates (11) on the same side.

7. The negative pressure water tank for profile extrusion molding according to claim 4, characterized in that, A water level scale is also arranged in the negative pressure chamber.

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