Cooling loop of hydraulic system

Abstract

The utility model discloses a cooling loop of a hydraulic system. The cooling loop comprises a cooling device, an oil way network and a control module. The cooling device is installed on an oil tank of the hydraulic system and suitable for forming an independent cooling cavity, and the volume of the cooling cavity is far smaller than that of the oil tank. The oil path network is suitable for connecting an execution element of the hydraulic system with the oil tank and the cooling cavity; the control module is suitable for controlling the oil way network to make oil of the execution element flow back to the oil tank or send part of the oil into the cooling cavity for rapid cooling. The cooling device has the beneficial effects that for an execution element with specific requirements, the cooling device can form an independent small-capacity cooling cavity to achieve rapid cooling and supply of a small amount of oil, and then the specific working condition requirements of a hydraulic system can be met, so that the vulcanization quality of products is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic systems, and in particular to a cooling circuit of a hydraulic system. Background Art

[0002] A vulcanizer is a machine that vulcanizes various rubber and plastic products. It has functions such as timed mold locking, automatic pressure replenishment, automatic temperature control, automatic timing, and time alarm. The vulcanization process of rubber and plastic products can be divided into four stages: vulcanization induction period, pre-vulcanization period, positive vulcanization period, and over-vulcanization period; a vulcanizer can realize each stage of the vulcanization process of rubber and plastic products.

[0003] During the vulcanization process of the vulcanizer, the process environment temperature inside the vulcanizer is different due to the different vulcanization stages; therefore, the temperature to which the hydraulic system of the vulcanizer is subjected during driving is also different. Existing hydraulic systems generally use constant power cooling, which makes the oil outlet temperature of the hydraulic system's oil tank basically the same. This will cause the hydraulic system to drive in different process temperature environments. The temperature of the hydraulic oil does not match the working environment temperature, that is, it is impossible to ensure a relatively constant temperature difference, causing a certain error in the drive of the hydraulic system. The accumulated error amplification of the multi-drive modules of the vulcanizer will affect the vulcanization quality of the vulcanizer. Based on this, it is now urgent to improve the cooling circuit of the existing hydraulic system. Summary of the invention

[0004] One of the objects of the present application is to provide a cooling circuit for a hydraulic system that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a cooling circuit of a hydraulic system, comprising a cooling device, an oil circuit network and a control module; the cooling device is installed on the oil tank of the hydraulic system, and the cooling device is suitable for forming an independent cooling cavity, and the volume of the cooling cavity is much smaller than the volume of the oil tank; the oil circuit network is suitable for connecting the actuator of the hydraulic system with the oil tank and the cooling cavity; the control module is suitable for controlling the oil circuit network to return the oil of the actuator to the oil tank, or to send part of the oil into the cooling cavity for rapid cooling.

[0006] Preferably, the cooling device includes a shell, a plurality of cooling components and at least one sealing component; the shell is mounted on the upper end surface of the oil tank; the cooling component is mounted on the shell and extends into the oil tank to cool the oil; the sealing component is mounted on the shell, and the sealing component is suitable for driving the cooling components at corresponding positions to seal with the shell, thereby forming the cooling cavity connected to the oil circuit network.

[0007] Preferably, the oil tank adopts a rectangular structure, and a plurality of the cooling assemblies are arranged in an array so that some of the cooling assemblies are located in cooling redundant positions; at least three other cooling assemblies are arranged around the cooling assembly located in the cooling redundant position, and the installation position of the sealing assembly corresponds to the cooling redundant position.

[0008] Preferably, four additional cooling assemblies are arranged around the cooling redundancy position corresponding to the sealing assembly installation position.

[0009] Preferably, there are a plurality of the sealing assemblies, and at least one cooling redundant position is spaced between the installation positions of adjacent sealing assemblies.

[0010] Preferably, the plurality of cooling assemblies are arranged in m rows and n columns, and the values ​​of m and n are both odd numbers; and the installation position of the sealing assembly corresponds to the middle row and / or middle column.

[0011] Preferably, a sleeve is installed on the lower end surface of the shell corresponding to the cooling redundant position; the sealing assembly includes a telescopic device and a pair of sealing plugs; the sealing plugs are fixedly connected at upper and lower intervals through connecting rods, and the cooling section of the cooling assembly located at the cooling redundant position is located between the sealing plugs; the telescopic device is installed on the upper part of the shell and connected to the sealing plug through the output end, and then the sealing plug carries the cooling section of the cooling assembly into the sleeve under the drive of the telescopic device, and the sealing plug is respectively sealed with the upper and lower ends of the sleeve to form the cooling cavity.

[0012] Preferably, the cooling device also includes a water pipe; the cooling assembly includes a cooling pipe and a pair of hoses; the cooling pipe is spirally arranged and installed between the sealing plugs as a cooling section of the cooling assembly, and both ends of the cooling pipe are respectively connected to the water pipe through the corresponding hoses, so that the cooling pipe and the water pipe circulate water through the hoses.

[0013] Compared with the prior art, the beneficial effects of this application are:

[0014] For actuators with specific requirements, the cooling device can form an independent small-capacity cooling cavity to achieve rapid cooling and supply of a small amount of oil, thereby meeting the specific working conditions of the hydraulic system to improve the vulcanization quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the application.

[0016] Figure 2 This is a schematic diagram of the exploded state of the cooling device and the oil tank in this application.

[0017] Figure 3 It is a schematic diagram of the structure of the shell in this application.

[0018] Figure 4 This is a schematic diagram of the structure of a cooling component that does not correspond to a sealing component in the present application.

[0019] Figure 5 It is a schematic diagram of the structure of the sealing component and the corresponding cooling component in this application.

[0020] Figure 6 It is a schematic diagram of the cross-sectional structure of the cooling device in the present application when viewed from above.

[0021] Figure 7 This is a schematic diagram of the local structure of the sealing assembly in the present application, which is lifted and matched with the sleeve to form a cooling cavity.

[0022] Figure 8 It is a schematic diagram of the structure of the water pipe in this application.

[0023] In the figure: oil tank 100, cooling device 2, shell 21, interface 210, positioning seat 211, sleeve 213, perforation 214, cooling assembly 22, cooling pipe 221, hose 222, connector 223, through hole 2231, connecting seat 224, sealing assembly 24, telescopic device 241, telescopic rod 242, sealing plug 243, connecting rod 244, water pipe 25, water receiving hole 250, control module 300. DETAILED DESCRIPTION

[0024] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0027] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0028] One of the embodiments of the present application is as follows: Figure 1 As shown, a cooling circuit of a hydraulic system includes a cooling device 2, an oil circuit network and a control module 300. The cooling device 2 can be installed in the oil tank 100 of the hydraulic system, and the cooling device 2 can cool down the oil in the oil tank 100; the cooling device 2 can also form an independent cooling cavity, and the volume of the cooling cavity is much smaller than the volume of the oil tank 100. The oil circuit network can connect the actuator of the hydraulic system with the oil tank 100 and the cooling cavity of the cooling device 2 at the same time, so that the oil of the actuator can flow back to the oil tank 100 or the cooling cavity of the cooling device 2 through the oil circuit network. When cooling the hydraulic system, the control module 300 can control the oil circuit network to return the oil to the oil tank 100 according to the working state of the hydraulic system, or send part of the oil into the cooling cavity for rapid cooling and re-delivery to a specific actuator.

[0029] It should be known that, due to the large volume of the oil tank 100 of the hydraulic system, the oils of different temperatures will be mixed when returning to the oil tank 100, so that the temperature of the oils will be within a smaller range. For ease of understanding, a specific example can be used to illustrate. Assume that 95% of the oil returning to the oil tank 100 has a temperature of 70°C, and the remaining 5% has a temperature of 60°C. Through the mixing of the two, the temperature of the oil in the oil tank 100 generally tends to 70°C. After cooling, the outlet temperatures of the two oils are the same, so that the difference in the inlet and outlet temperatures of the two oils will be relatively large; which may cause certain errors in the temperature compensation calculation of the hydraulic system. In order to reduce the temperature compensation calculation error of the hydraulic system, the oil with a return temperature of 60°C can be cooled independently, that is, the cooling capacity of the hydraulic system is changed.

[0030] Based on the above analysis results, this embodiment can detect the working state of the hydraulic system through the control module 300, and then control and adjust the cooling capacity of the hydraulic system according to the detection result. Compared with the traditional method, it can meet the specific working condition requirements of the hydraulic system to improve the vulcanization quality of the product.

[0031] Specifically, the actuator corresponding to the oil with a return oil temperature of 60% and a proportion of 5% in the above content can be defined as a specific actuator. The output end of the specific actuator will be connected in parallel to the cooling chamber of the oil tank 100 and the cooling device 2 through two branches, and the output end of the cooling device 2 and the oil outlet of the oil tank 100 will be connected in parallel to the input end of the specific actuator through two branches. The two branches of the input and output ends of the specific actuator are controlled by the control valve accordingly. The cooling device 2 can form an independent small-capacity cooling chamber to achieve rapid cooling and supply of a small amount of oil, which can meet the requirements of the specific actuator under the specific working conditions of the vulcanizer, thereby improving the vulcanization quality of the product.

[0032] It is understandable that the specific structures and working principles of the oil circuit network, the control module 300 and the actuators are well known to those skilled in the art, and therefore will not be elaborated in detail here; a common actuator is an oil cylinder.

[0033] In this embodiment, there are many specific structures of the cooling device 2 that can achieve the above functions. For the sake of easy understanding, one of the structures will be described in detail below. Figure 2 As shown, the cooling device 2 includes a shell 21, a plurality of cooling components 22, at least one sealing component 24 and a water pipe 25. The shell 21 is used to support the entire cooling device 2, and the shell 21 can be installed on the upper end surface of the oil tank 100. The cooling component 22 is installed on the shell 21, and the cooling component 22 can extend into the oil tank 100 to cool the oil. Through the arrangement of multiple cooling components 22, it is possible to achieve synchronous cooling of various areas in the oil tank 100, thereby ensuring the stability of the oil outlet temperature of the oil tank 100. The sealing component 24 is installed on the shell 21, and the sealing component 24 can drive the cooling component 22 at the corresponding position to seal with the shell 21, thereby forming a cooling cavity connected to the oil circuit network to meet the oil cooling requirements of specific actuators. The water pipe 25 can be connected to each cooling component 22 for water circulation.

[0034] It should be known that the cooling power of the cooling device 2 for the oil in the oil tank 100 is equivalent to the sum of the cooling powers of the cooling components 22. In order to ensure stable cooling of the oil in the oil tank 100, the cooling components 22 need to be evenly arranged; this can ensure that the cooling components 22 cool down the oil in various areas of the oil tank 100 at the same time, thereby ensuring that the oil temperature in various areas of the oil tank 100 tends to be consistent, so as to ensure the stability of the oil outlet temperature and avoid or reduce the error of the temperature difference compensation calculation of the hydraulic system.

[0035] In this embodiment, the oil tank 100 of the hydraulic system generally adopts a barrel-shaped structure or a rectangular structure; in order to give full play to the cooling efficiency of the cooling assembly 22, in this embodiment, the oil tank 100 preferably adopts a rectangular structure. The rectangular oil tank 100 can be divided into multiple equal-volume areas in a horizontal and vertical manner, and multiple cooling assemblies 22 can correspond to each divided area, thereby ensuring that the cooling assembly 22 cools the oil in the oil tank 100 uniformly. At this time, the arrangement between the multiple cooling assemblies 22 is an array setting.

[0036] It is understandable that the cooling assembly 22 can radiate to the adjacent areas when performing cooling work, so there are cooling redundant positions in the areas divided by the oil tank 100. In layman's terms, the oil in the cooling redundant position will be cooled to a certain extent by the cooling radiation of the cooling assemblies 22 in the adjacent multiple areas, so that the cooling efficiency requirements of the corresponding cooling assembly 22 are relatively low. Specifically, at least three other cooling assemblies 22 are arranged around the cooling assembly 22 located at the cooling redundant position.

[0037] It should be known that, based on the characteristics of the above-mentioned cooling redundant position, isolating the cooling component 22 at the cooling redundant position will not have a significant impact on the overall cooling level of the oil in the oil tank 100. Therefore, when forming the cooling cavity, the installation position of the sealing component 24 can correspond to the cooling redundant position.

[0038] In this embodiment, it can be seen from the above content that there are two situations for the cooling redundant position. The first situation is that three cooling components 22 are arranged at the adjacent position of the cooling redundant position, that is, the cooling redundant position is close to the side position of the oil tank 100; the second situation is that four cooling components 22 are arranged at the adjacent position of the cooling redundant position, that is, the cooling redundant position is close to the middle area of ​​the oil tank 100. Figure 6 As shown, if there are multiple cooling redundant positions of the two types mentioned above, when forming the cooling cavity, in order to further reduce the impact on the cooling of the oil in the oil tank 100, the cooling redundant position corresponding to the cooling cavity preferably adopts the second type mentioned above.

[0039] In this embodiment, the specific number of cooling cavities can be determined according to actual needs. If more than one cooling cavity is required, then in the multiple sealing assemblies 24 corresponding to the multiple cooling cavities, there is at least one cooling redundant position between the installation positions of adjacent sealing assemblies 24. This can improve the cooling efficiency of the cooling assembly 22 in the oil tank 100 for the oil in the oil tank 100.

[0040] It should be known that when a sealing assembly 24 is installed in one of two adjacent cooling redundant positions, the other cooling redundant position may be damaged, so the sealing assemblies 24 corresponding to the two cooling redundant positions are arranged at intervals to ensure uniform cooling of the cooling device 2. Figure 6 As shown, there are two sealing assemblies 24 , and a cooling assembly 22 is spaced between the two sealing assemblies 24 .

[0041] Specifically, the plurality of cooling assemblies are arranged in m rows and n columns, and the values ​​of m and n are both odd numbers. The installation position of the sealing assembly 24 corresponds to the middle row and / or middle column; this ensures that the installation position of the sealing assembly 24 is symmetrical as a whole, thereby ensuring that the remaining cooling assemblies 22 cool the oil in the oil tank 100 uniformly.

[0042] In this embodiment, Figure 3 , Figure 5 and Figure 7 As shown, the lower end surface of the shell 21 is provided with a perforation 214 at least in the area corresponding to the redundant cooling position, so that the cooling assembly 22 corresponding to the redundant cooling position can be lifted and lowered along the perforation 214 in the vertical direction. A sleeve 213 aligned with the connecting perforation 214 is installed on the lower end surface of the shell 21 corresponding to the redundant cooling position. The sealing assembly 24 includes a telescopic device 241 and a pair of sealing plugs 243. The two sealing plugs 243 can be fixedly connected at an upper and lower interval by a connecting rod 244, and the cooling section of the cooling assembly 22 located at the redundant cooling position is located in the area between the two sealing plugs 243. The telescopic device 241 is fixedly installed on the upper part of the shell 21 and is connected to the sealing plug 243 through the telescopic rod 242 at the output end. When it is necessary to cool the oil of a specific actuator, the control module 300 can control the telescopic device 241 to start, and then the telescopic device 241 can retract the telescopic rod 242, so that the sealing plug 243 carrying the cooling section of the cooling assembly 22 can be synchronously moved upward to enter the sleeve 213, until the two sealing plugs 243 are respectively sealed with the upper and lower ends of the sleeve 213 to form the required cooling cavity.

[0043] In this embodiment, Figure 4 , Figure 5 and Figure 7As shown, the cooling assembly 22 includes a cooling pipe 221 and a pair of hoses 222. The cooling pipe 221 can be a metal pipe, such as a copper pipe; it can also be a non-metallic pipe, such as a glass pipe or a plastic pipe; the cooling pipe 221 has a certain rigidity and is spirally arranged to provide a larger contact area to accelerate cooling; the cooling pipe 221 can be extended into the oil tank 100 or the sleeve 213 as a cooling section of the cooling assembly 22. The cooling pipe 221 is generally formed by winding a whole pipe, and the two ends of the cooling pipe 221 can be connected to the water pipe 25 for water inlet and water outlet through the corresponding hoses 222. The flexible bending of the hose 222 can facilitate the vertical movement of the cooling pipe 221.

[0044] Specifically, the cooling assembly 22 has two installation forms, one is to be installed on the sealing assembly 24, and the other is to be directly installed on the housing 21. If the cooling assembly 22 and the sealing assembly 24 are installed correspondingly, then Figure 5 As shown in FIG. 1 , the cooling assembly 22 is installed between the two sealing plugs 243 of the sealing assembly 24 through the cooling pipe 221 as a cooling section. If the cooling assembly 22 is directly installed on the housing 21, then Figure 4 As shown, the cooling assembly 22 further includes a connecting seat 224 , the cooling pipe 221 is installed on the connecting seat 224 , and the cooling assembly 22 is supported and installed on the shell 21 through the connecting seat 224 .

[0045] In this embodiment, there are many specific structures for connecting the water pipe 25 and the hose 222. For the sake of easy understanding, one of the structures will be described in detail below. Figure 2 , Figure 4 , Figure 5 and Figure 8 As shown, there are multiple pairs of water pipes 25, and the two water pipes 25 of each pair are respectively connected with the two hoses 222 of each cooling assembly 22, so as to realize the water supply and drainage of the cooling pipe 221. The water pipe 252 is rotatably installed on the shell 21 and is connected with the interface 210 set on one side of the shell 21, so that the cooling water in the external water tank (not shown) can be passed into the corresponding water pipe 252 through the interface 210 until it flows to the corresponding cooling assembly 22; at the same time, the warm water that absorbs heat in the cooling assembly 22 can flow from another water pipe 252 along the interface 210 to the recovery box (not shown). Specifically, the upper ends of the hoses 222 corresponding to the cooling assembly 22 are connected with the connector 223 through the through hole 2231, and the connector 223 can be positioned and installed on the positioning seat 211 set on the shell 21 and sealed and sleeved with the water pipe 25. Then the water pipe 25 can be connected with the corresponding through hole 2231 through the water inlet 250 set on the side wall to realize the water circulation of the cooling assembly 22.

[0046] It is understandable that the number of pairs of water pipes 25 is the minimum value of m and n, which can reduce the number of water pipes 25 used, thereby reducing costs. For ease of understanding, taking m=3 and n=5 as an example, the number of pairs of water pipes 25 is three; accordingly, each water pipe 25 is provided with five water inlets 250 spaced apart along the axial direction.

[0047] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A cooling circuit of a hydraulic system, characterized in that: include: Cooling device; The cooling device is installed on the oil tank of the hydraulic system, and the cooling device is suitable for forming an independent cooling cavity, and the volume of the cooling cavity is much smaller than the volume of the oil tank; Oil circuit network; the oil circuit network connects the actuator of the hydraulic system with the oil tank and the cooling chamber; as well as Control module; The control module is suitable for controlling the oil circuit network to return the oil of the actuator to the oil tank, or to send part of the oil into the cooling chamber for rapid cooling.

2. The cooling circuit of the hydraulic system according to claim 1, characterized in that: The cooling device comprises: Shell; the shell is mounted on the upper end surface of the oil tank; A plurality of cooling assemblies; the cooling assemblies are mounted on the housing and extend into the oil tank to cool the oil; and At least one sealing component; the sealing component is installed on the housing, and the sealing component is suitable for driving the cooling component at the corresponding position to seal with the housing, thereby forming the cooling cavity connected to the oil circuit network.

3. The cooling circuit of the hydraulic system according to claim 2, characterized in that: The oil tank adopts a rectangular structure, and a plurality of the cooling components are arranged in an array so that some of the cooling components are located in cooling redundant positions; At least three other cooling assemblies are arranged around the cooling assembly located at the cooling redundant position, and the installation position of the sealing assembly corresponds to the cooling redundant position.

4. The cooling circuit of the hydraulic system according to claim 3, characterized in that: Four additional cooling assemblies are arranged around the cooling redundancy position corresponding to the sealing assembly installation position.

5. The cooling circuit of the hydraulic system according to claim 3, characterized in that: There are a plurality of sealing assemblies, and at least one cooling redundant position is spaced between the installation positions of adjacent sealing assemblies.

6. The cooling circuit of the hydraulic system according to claim 3, characterized in that: The plurality of cooling assemblies are arranged in m rows and n columns, and the values ​​of m and n are both odd numbers; the installation position of the sealing assembly corresponds to the middle row and / or middle column.

7. The cooling circuit of the hydraulic system according to any one of claims 2 to 6, characterized in that: A sleeve is installed on the lower end surface of the shell corresponding to the cooling redundant position; the sealing assembly includes: a pair of sealing plugs; the sealing plugs are fixedly connected in an upper and lower interval through a connecting rod, and the cooling section of the cooling assembly located at the cooling redundant position is located between the sealing plugs; and A telescopic device; the telescopic device is installed on the upper part of the shell and is connected to the sealing plug through the output end, so that the sealing plug carries the cooling section of the cooling assembly into the sleeve under the drive of the telescopic device; the sealing plug is respectively sealed with the upper and lower ends of the sleeve to form the cooling cavity.

8. The cooling circuit of the hydraulic system according to claim 7, characterized in that: The cooling device also includes a water pipe; the cooling assembly includes: A cooling pipe; the cooling pipe is spirally arranged and installed between the sealing plugs as a cooling section of the cooling assembly; and A pair of hoses; both ends of the cooling pipe are connected to the water pipe through the corresponding hoses, so that the cooling pipe and the water pipe circulate water through the hoses.

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