Cooling device of hydraulic system

Abstract

The utility model discloses a cooling device of a hydraulic system. The cooling device comprises a shell, a plurality of cooling assemblies and at least one pipeline adjusting assembly. The shell is installed on the upper end face of an oil tank of the hydraulic system, and the cooling assembly is installed on the shell and extends into the oil tank to cool oil. The pipeline adjusting assembly is suitable for being communicated with all the cooling assemblies in a water circulation mode, and the pipeline adjusting assembly is suitable for stopping water circulation of part of the cooling assemblies. The hydraulic system has the beneficial effect that the cooling efficiency of the cooling device in the hydraulic system on the oil tank is controlled by cutting off part of the cooling assemblies. Compared with a traditional full-power cooling mode, energy loss can be effectively reduced so as to save cost, and stable control over the oil temperature can be achieved. And by selecting the position of the cut-off cooling assembly, it can be guaranteed that the cooling device always has good cooling efficiency when the cooling power of the cooling device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic systems, and in particular to a cooling device for 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; thus, the temperature to which the hydraulic system of the vulcanizer is subjected during driving is also different. The existing hydraulic system generally cools the hydraulic oil according to a set fixed power, which will cause a waste of cooling power for the vulcanization stage with a lower process temperature.

[0004] Generally speaking, cooling devices cool hydraulic systems by water cooling, and the return oil temperature of the hydraulic system is a relatively good scaling temperature, so the cooling pipeline of the cooling device is prone to scale and needs to be replaced frequently. However, existing cooling devices lack the conditions for replacing the cooling pipeline, or the cooling pipeline is not convenient to replace.

[0005] Based on this, there is an urgent need to improve the cooling device of the existing hydraulic system. Utility Model Content

[0006] One of the objects of the present application is to provide a cooling device for a hydraulic system that can solve at least one of the defects in the above-mentioned background technology.

[0007] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a cooling device for a hydraulic system, comprising a shell, multiple cooling components and at least one pipeline regulating component; the shell is installed on the upper end surface of the oil tank of the hydraulic system, and the cooling component is installed on the shell and extends into the oil tank to cool the oil; the pipeline regulating component is suitable for being connected to each of the cooling components for water circulation, and the pipeline regulating component is suitable for cutting off the water circulation of some of the cooling components.

[0008] Preferably, 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 components are arranged around the cooling component located in the cooling redundant position; and the pipeline regulating component is suitable for cutting off the cooling component located in the cooling redundant position.

[0009] Preferably, the pipeline regulating assembly is suitable for cutting off the cooling assembly at the cooling redundant position and the array corner position.

[0010] Preferably, the plurality of cooling components are arranged in m rows and n columns, and the values ​​of m and n are both odd numbers; the cooling components cut off by the pipeline regulating components are symmetrically arranged along the middle rows and middle columns of the array.

[0011] Preferably, the cooling device performs multi-level adjustment of the cooling power according to the different numbers of the cooling components that are cut off by the pipeline regulating component; the cooling power of the cooling device is the sum of the working powers of each cooling component, and the cooling power of the cooling device is adjusted in multiple levels between 50% and 100%.

[0012] Preferably, the number of pipeline regulating components is the minimum value between m and n; the pipeline regulating components include a pair of water pipes and a plurality of control valves; the water pipes are installed on the shell and are connected to the cooling components of the corresponding rows or columns for water inlet and water outlet through a plurality of connection areas arranged at intervals along the axial direction; the control valve is installed between the cooling component to be cut off and the connection area, and the conduction or cutoff of the corresponding cooling component is controlled by the control valve.

[0013] Preferably, the cooling assembly includes a cooling pipe, a pair of hoses and a connecting seat; the cooling assembly is supported and installed on the through-hole provided on the lower end surface of the shell through the connecting seat; the cooling pipe is spirally arranged and installed on the lower part of the connecting seat, and the hose is respectively connected to the pipeline regulating assembly and the two ends of the cooling pipe, so that the cooling pipe forms a water circulation with the pipeline regulating assembly through the hose.

[0014] Preferably, the cooling device further comprises a plurality of lifting assemblies, wherein the lifting assemblies correspond in position to each of the cooling assemblies, and the lifting assemblies are suitable for driving the corresponding cooling assemblies to be lifted from the oil tank or placed into the oil tank.

[0015] Preferably, the lifting assembly includes an electromagnetic column and a magnetic sleeve; the magnetic sleeve is fixedly installed at the center of the connecting seat; the electromagnetic column is fixedly installed at the shell and plugged into the magnetic sleeve; the electromagnetic column generates magnetic fields in different directions by connecting currents in different directions, thereby driving the magnetic sleeve to drive the connecting seat and the cooling pipe to move vertically up and down.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] By cutting off some cooling components, the cooling efficiency of the cooling device on the oil tank in the hydraulic system can be controlled. Compared with the traditional full-power cooling method, it can effectively reduce energy loss to save costs, and can achieve stable control of the oil temperature. And by selecting the position of the cut-off cooling component, it can ensure that the cooling efficiency of the cooling device is always good when the cooling power is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the exploded state of the cooling device and the oil tank in this application.

[0019] Figure 2 It is a schematic diagram of the structure of the shell in this application.

[0020] Figure 3 It is a schematic diagram of the structure of the cooling component in this application.

[0021] Figure 4 It is a schematic diagram of a local state in which the cooling component in the present application is lifted by the lifting component.

[0022] Figure 5 This is a schematic diagram of the structure of the pipeline regulating assembly in this application.

[0023] Figure 6 This is a simplified schematic diagram of the first combination mode of operation of each cooling component in this application.

[0024] Figure 7 This is a simplified schematic diagram of the second combination mode in which each cooling component in this application works.

[0025] Figure 8 This is a simplified schematic diagram of the third combination mode in which each cooling component in this application works.

[0026] Fig. 9 This is a simplified schematic diagram of combination mode 4 of the operation of each cooling component in this application.

[0027] Fig.10 This is a simplified schematic diagram of combination mode 5 in which each cooling component in this application works.

[0028] Fig.11 This is a simplified schematic diagram of the sixth combination mode in which each cooling component in this application works.

[0029] Fig.12 This is a simplified schematic diagram of combination mode seven of the operation of each cooling component in this application.

[0030] Fig.13 A simplified schematic diagram of the eighth working combination mode of each cooling component in the present application.

[0031] In the figure: oil tank 100, shell 21, interface 210, positioning seat 211, connecting frame 212, perforation 214, cooling assembly 22, cooling pipe 221, hose 222, connector 223, positioning groove 2230, through hole 2231, connecting seat 224, lifting assembly 23, electromagnetic column 231, magnetic sleeve 232, pipeline adjustment assembly 25, water pipe 252. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Those skilled in the art should know that, taking a vulcanizer as an example, when designing the cooling of a conventional hydraulic system, the cooling power is generally designed according to the full load condition of the vulcanizer; that is, the vulcanizer is designed to be cooled when it is operating at maximum power and the ambient temperature is at the highest temperature. However, the temperature generated by the vulcanizer in different working conditions is different, and the working condition of the vulcanizer will be affected by factors such as the working condition, the vulcanization steps, the amount of the product to be vulcanized, and the environment.

[0037] Specifically, when the vulcanizer is started, the return oil temperature of the hydraulic system begins to rise gradually until it is in a relatively stable range. If the hydraulic system is always in the maximum cooling state during this process, it will cause a large waste of resources in the early stage.

[0038] The working power of the vulcanizer is mainly determined by the amount of products to be vulcanized. The greater the amount of products to be vulcanized, the greater the working power of the vulcanizer and the higher the temperature generated, and vice versa. If the hydraulic system is always in the maximum cooling state, it will cause a waste of resources with a small amount of products.

[0039] The cooling of hydraulic system is generally carried out by water circulation, and the temperature of cooling water in the water circulation corresponds to the external environment temperature. In summer, when the temperature is high, the temperature of cooling water in the water circulation may be 20℃~25℃, while in winter, the temperature of cooling water in the water circulation may be below 10℃, and there will be a temperature difference of more than ten degrees Celsius between the two; and the ambient temperature generated by the vulcanizer itself will also be affected by the environment, making the return oil temperature in summer higher than that in winter. If the hydraulic system is always in the maximum cooling state, it will cause a large waste of resources in non-winter.

[0040] Based on the above analysis results, the present application can control and adjust the cooling power of the hydraulic system according to the working state of the vulcanizer. Compared with the traditional full-power cooling method, it can effectively reduce energy loss and save costs.

[0041] In order to solve the above technical problems, the present application provides a cooling device for a hydraulic system, wherein a preferred embodiment is as follows: Figure 1 As shown, the cooling device includes a housing 21, a plurality of cooling components 22, and at least one pipeline regulating component 25. The housing 21 is used to support the entire cooling device, and the housing 21 can be installed on the upper end surface of the oil tank 100. The cooling component 22 is installed on the housing 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 pipeline regulating component 25 can be connected to each cooling component 22 for water circulation, and the pipeline regulating component 25 can cut off the water circulation of some cooling components 22 according to the set cooling power.

[0042] It should be known that the cooling power of the cooling device for the oil in the oil tank 100 is equivalent to the sum of the cooling powers of each cooling assembly 22; thus, the cooling power of the cooling device can be controlled by controlling the number of working cooling assemblies 22. In order to ensure stable cooling of the oil in the oil tank 100, the cooling assemblies 22 need to be evenly arranged; this ensures that the cooling assemblies 22 cool down the oil in each area of ​​the oil tank 100 at the same time, thereby ensuring that the oil temperature in each area of ​​the oil tank 100 tends to be consistent, so as to ensure the temperature of the oil outlet temperature, and avoid or reduce the error of the temperature difference compensation calculation of the hydraulic system.

[0043] 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.

[0044] It is understandable that the cooling assembly 22 can radiate to 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 assembly 22 in multiple adjacent areas, so the cooling efficiency requirements for 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. Based on the characteristics of the above-mentioned cooling redundant position, cutting off the cooling assembly 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.

[0045] It should be noted that the cooling power of the cooling device can be regarded as the water supply per unit time, and the cooling efficiency of the cooling device can be regarded as the cooling temperature of the oil in the oil tank 100 per unit time. The cooling efficiency and cooling power of the cooling device are not necessarily the same, that is, if the water supply of the cooling device is reduced by 50%, it does not mean that the cooling efficiency of the cooling device for the oil in the oil tank 100 is reduced by 50%.

[0046] In this embodiment, the cooling assembly 22 that is cut off when the pipeline regulating assembly 25 performs gear adjustment can be any. However, in actual applications, people in this field hope to improve the cooling efficiency of the cooling device as much as possible while reducing the cooling power of the cooling device. Therefore, in this embodiment, the cooling assembly 22 that is cut off when the pipeline regulating assembly 25 performs cooling power adjustment of the cooling device is preferably a cooling assembly 22 located at a cooling redundant position.

[0047] More specifically, since only two surfaces of the corner position of the oil tank 100 can be connected to the rest of the area according to the divided area, that is, the fluidity of the oil at the corner position is average, the corner position of the oil tank 100 can also be used as a characteristic with a certain cooling redundancy. Therefore, the cooling assembly 22 located at the corner position of the array can also be cut off by the pipeline adjustment assembly 25 to achieve the cooling power adjustment of the cooling device.

[0048] In this embodiment, Figures 6 to 13 As shown, the plurality of cooling components 22 are arranged in m rows and n columns, and the values ​​of m and n are both odd numbers. The cooling components 22 that are blocked by the pipeline regulating components 25 are symmetrically arranged along the middle rows and middle columns of the array.

[0049] It should be known that, in order to ensure the cooling efficiency of the cooling components 22 on the oil in the oil tank 100, the cut-off cooling components 22 are preferably distributed symmetrically, and the cut-off cooling components 22 are preferably arranged at intervals, so that the remaining cooling components 22 in working state can basically achieve uniform cooling of the oil in the oil tank 100. Therefore, in order to facilitate the symmetrical arrangement of the cut-off cooling components 22, the multiple cooling components 22 included in the cooling device in this embodiment preferably use odd rows and odd columns, and then the middle row and middle column can be used as the symmetry axis.

[0050] In this embodiment, Figures 6 to 13 As shown, when adjusting the power of the cooling device, the water circulation of different numbers of cooling components 22 is cut off according to the selected area through the pipeline adjustment component 25, so that the cooling power of the cooling device can be adjusted in multiple gears between 50% and 100%; that is, the pipeline adjustment component 25 can cut off nearly half of the number of cooling components 22 at most. However, according to the characteristics of the cooling redundancy position, the cooling efficiency of the cooling device can be guaranteed to be greater than 50%, or even greater than 70%.

[0051] For ease of understanding, the following will provide a detailed description using specific examples. Figures 6 to 13 As shown, taking m=3, n=5 and a total of fifteen cooling components 22 as an example, the cooling power of the cooling device can be divided into eight gears from 50% to 100%, that is, corresponding to eight combination modes. Each combination mode will be described in detail below in conjunction with the accompanying drawings. It should be noted that in Figures 6 to 13 In the figure, each cooling component 22 is represented by a circle, the cut-off cooling component 22 is bolded and marked with ×, and the position of each cooling component 22 is represented by the coordinates (i, j) of the corresponding m×n array, then the value of i is {1, 2, 3}, and the value of j is {1, 2, 3, 4, 5}.

[0052] Combination mode 1: Figure 6 As shown, all fifteen cooling assemblies 22 are in working state, and the cooling power of the cooling device is 100%.

[0053] Combination mode 2: Figure 7 As shown, one cooling assembly 22 among the fifteen cooling assemblies 22 is cut off, and the coordinate position of the cut off cooling assembly 22 is (i=2, j=3); at this time, the cooling power of the cooling device is 14 / 15, which is about 93%.

[0054] Combination mode three: Figure 8 As shown, two cooling components 22 among the fifteen cooling components 22 are cut off, and the coordinate positions of the cut off cooling components 22 are (i=2, j=2) and (i=2, j=4) respectively; at this time, the cooling power of the cooling device is 13 / 15, which is about 87%.

[0055] Combination mode 4: Fig. 9 As shown, three cooling components 22 among the fifteen cooling components 22 are cut off, and the coordinate positions of the cut off cooling components 22 are (i=2, j=1), (i=2, j=3) and (i=2, j=5) respectively; at this time, the cooling power of the cooling device is 12 / 15, that is, 80%.

[0056] Combination mode 5: Fig.10 As shown, four cooling components 22 among the fifteen cooling components 22 are cut off, and the coordinate positions of the cut-off cooling components 22 are (i=1, j=2), (i=1, j=4), (i=3, j=2) and (i=3, j=4), respectively; at this time, the cooling power of the cooling device is 11 / 15, which is about 73%.

[0057] Combination mode six: Fig.11 As shown, five cooling components 22 out of fifteen cooling components 22 are cut off, and the coordinate positions of the cut-off cooling components 22 are (i=1, j=2), (i=1, j=4), (i=2, j=3), (i=3, j=2) and (i=3, j=4); at this time, the cooling power of the cooling device is 10 / 15, which is about 67%.

[0058] Combination mode seven: Fig.12 As shown, six cooling components 22 out of fifteen cooling components 22 are cut off, and the coordinate positions of the cut-off cooling components 22 are (i=1, j=2), (i=1, j=4), (i=2, j=2), (i=2, j=4), (i=3, j=2) and (i=3, j=4); at this time, the cooling power of the cooling device is 9 / 15, that is, 60%.

[0059] Combination mode eight: Fig.13As shown, eight cooling components 22 out of fifteen cooling components 22 are cut off, and the coordinate positions of the cut-off cooling components 22 are (i=1, j=1), (i=1, j=3), (i=1, j=5), (i=2, j=2), (i=2, j=4), (i=3, j=1), (i=3, j=3) and (i=3, j=5); at this time, the cooling power of the cooling device is 7 / 15, which is about 47%.

[0060] In this embodiment, Figures 2 to 4 As shown, the lower end surface of the shell 21 is provided with perforations 214 corresponding to the number and position of the cooling assembly 22, so that the cooling assembly 22 can be lifted and lowered vertically along the perforations 214. The cooling assembly 22 includes a cooling pipe 221, a pair of hoses 222 and a connecting seat 224. When installing the cooling assembly 22, the cooling assembly 22 can be supported and installed on the perforation 214 of the lower end surface of the shell 21 through the connecting seat 224. 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 the 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 pipeline regulating assembly 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 .

[0061] In this embodiment, Figure 1 , Figure 2 and Figure 5 As shown, the number of pipeline regulating components 25 takes the minimum value between m and n; multiple pipeline regulating components 25 are equidistantly distributed along the row or column direction. The pipeline regulating component 25 includes a pair of water pipes 252 and multiple control valves (not shown). The two water pipes 252 are installed on the shell 21 and are connected to the cooling components 22 of the corresponding row or column for water inlet and drainage through multiple connection areas arranged at intervals along the axial direction. The number of control valves is equal to the total number of cooling components 22 that need to be cut off. The control valve can be installed between the cooling component 22 to be cut off and the corresponding connection area, and the conduction or cutoff of the corresponding cooling component 22 is controlled by the control valve, thereby realizing multi-speed adjustment of the cooling power of the cooling device.

[0062] It should be known that the cooling assembly 22 can be connected to the corresponding connection area on the water pipe 252 through the hose 222, and the control valve is installed between the connection area of ​​the hose 222 and the water pipe 252; the specific installation method of the control valve can be installed on the hose 222, or the hose 222 can be connected to the control valve, and then the control valve is connected to the water pipe 252 through a pipeline. The specific installation structure is a well-known technology for those skilled in the art, so it will not be elaborated in detail here. For the convenience of understanding, a detailed description will be given below through one of the specific examples.

[0063] Specifically, Figures 2 to 5 As shown, the upper end of each hose 222 in the cooling assembly 22 is connected to a connector 223, and the connector 223 is connected to the hose 222 through a through hole 2231. A water receiving hole 2520 is provided on the side wall of each connection area of ​​the water pipe 252, and the water pipe 252 can be connected to the through hole 2231 provided in the connector 223 at the end of the hose 222 through the water receiving hole 2520. The control valve is installed on the upper part of the hose 222, and the conduction of the hose 222 can be cut off by the control valve to avoid interference with the subsequent lifting and lowering of the cooling assembly 22.

[0064] It should be known that the water pipe 252 is installed on the shell 21 and communicates 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 through the interface 210 into the corresponding water pipe 252 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). The connector 223 and the interface 210 are always sealed with the water pipe 252. The interface 210 can be fixedly connected to the shell 21 by fastener connection. The connector 223 can be positioned and connected with the positioning seat 211 set on the shell 21 to ensure the stability of the installation. There are many specific connection methods between the connector 223 and the positioning seat 211. For example, the outer part of the connector 223 is provided with a concave positioning groove 2230. When the connector 223 is sleeved on the positioning seat 211, it can be engaged with the positioning block on the positioning seat 211 through the positioning groove 2230.

[0065] It is understandable that selecting the minimum value between m and n for the number of pipeline regulating components 25 can reduce the use of pipeline regulating components 25, thereby reducing costs. Figures 6 to 13 As shown, the value of m is 3, the value of n is 5, and the number of pipeline regulating components 25 is three. Accordingly, the number of connection areas corresponding to each water pipe 252 in the pipeline regulating component 25 is the value of n being 5.

[0066] In this embodiment, Figures 2 to 4As shown, the lower end surface of the shell 21 is provided with perforations 214 corresponding to the number and position of the cooling assembly 22, so that the cooling assembly 22 can be lifted and lowered vertically along the perforations 214. The cooling assembly 22 includes a cooling pipe 221, a pair of hoses 222 and a connecting seat 224. When installing the cooling assembly 22, the cooling assembly 22 can be supported and installed on the perforation 214 of the lower end surface of the shell 21 through the connecting seat 224. 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 the 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 pipeline regulating assembly 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 .

[0067] In this embodiment, Figure 1 As shown, the cooling device further includes a plurality of lifting assemblies 23, and the lifting assemblies 23 cooperate with each cooling assembly 22. The lifting assemblies 23 can drive the corresponding cooling assembly 22 to be lifted from the oil tank 100 or placed into the oil tank 100.

[0068] It should be known that the temperature of the oil returned from the hydraulic system to the oil tank 100 is generally 60°C or above; it is well known to those skilled in the art that 60°C or above is also a preferred temperature for the cooling water in the cooling pipe 221 to generate scale. Therefore, in this embodiment, the cooling pipe 221 needs to be replaced after the cooling assembly 22 has worked for a set time; therefore, a lifting assembly 23 needs to be provided to lift the cooling pipe 221 for easy replacement.

[0069] In this embodiment, there are many specific structures of the lifting assembly 23 that can achieve the above functions. For the sake of easy understanding, the following will be described in detail using one of the structures. Figures 2 to 5 As shown, the cooling pipe 221 is detachably fixedly connected to the lower part of the connecting seat 224, and one end of the hose 222 can be connected to the connecting seat 224 and communicated with the corresponding end of the cooling pipe 221. The lifting assembly 23 includes an electromagnetic column 231 and a magnetic sleeve 232; the magnetic sleeve 232 is fixedly installed at the center of the connecting seat 224; the electromagnetic column 231 is fixedly installed on the connecting frame 212 set on the shell 21 and plugged with the magnetic sleeve 232. The electromagnetic column 231 generates magnetic fields in different directions by connecting currents in different directions, thereby driving the magnetic sleeve 232 to drive the connecting seat 224 and the cooling pipe 221 to move vertically up and down.

[0070] It should be known that a constant force magnetic spring can be formed by energizing the electromagnetic column 231 and cooperating with the magnetic sleeve 232; the direction of the magnetic field can be changed by passing currents in different directions through the electromagnetic column 231, and the constant force direction of the constant force magnetic spring formed will also change. The specific principle of the electromagnetic column 231 and the magnetic sleeve 232 cooperating to form a constant force magnetic spring is well known to those skilled in the art, so it will not be elaborated in detail here. The driving force of the constant force magnetic spring can be adjusted by the magnetic field strength, that is, by changing the value of the connected current. The magnetic sleeve 232 only needs to have magnetic conductivity, and the specific material selection is a known technology for those skilled in the art. The common material of the magnetic sleeve 232 is iron metal. The overall structure of the constant force magnetic spring is simple, and each constant force magnetic spring can be used as an independent drive to lift the corresponding cooling component 22, and the driving force is constant, which can ensure the stability of the lifting of the cooling component 22. For the harsh working conditions of the hydraulic system, the simpler the structure of the lifting component 23, the more reliable it is.

[0071] 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 device for a hydraulic system, characterized in that: include: Shell; the shell is mounted on the upper end surface of the oil tank of the hydraulic system; A plurality of cooling components; the cooling components are mounted on the housing and extend into the oil tank to cool the oil; as well as At least one pipeline regulating component; the pipeline regulating component is suitable for being connected to each of the cooling components for water circulation, and the pipeline regulating component is suitable for cutting off the water circulation of some of the cooling components.

2. The cooling device of the hydraulic system according to claim 1, 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 components are arranged around the cooling component located at the cooling redundant position; the pipeline regulating component is suitable for cutting off the cooling component located at the cooling redundant position.

3. The cooling device of the hydraulic system according to claim 2, characterized in that: The pipeline regulating assembly is suitable for cutting off the cooling assembly at the cooling redundancy position and the array corner position.

4. The cooling device for a hydraulic system according to claim 3, characterized in that: The plurality of cooling components are arranged in m rows and n columns, and the values ​​of m and n are both odd numbers; The cooling components that are cut off by the pipeline regulating components are symmetrically arranged along the middle rows and middle columns of the array.

5. The cooling device for a hydraulic system according to claim 4, characterized in that: The cooling device performs multi-level adjustment of cooling power according to the number of cooling components cut off by the pipeline adjustment component; The cooling power of the cooling device is the sum of the working powers of the cooling components, and the cooling power of the cooling device is adjusted in multiple gears between 50% and 100%.

6. The cooling device for a hydraulic system according to claim 5, characterized in that: The number of the pipeline regulating components takes the minimum value between m and n; The pipeline adjustment component includes: A pair of water pipes; the water pipes are mounted on the housing and connected to the cooling components of the corresponding rows or columns for water inlet and outlet through a plurality of connection areas spaced apart in the axial direction; and A plurality of control valves; the control valves are installed between the cooling assembly to be cut off and the connection area, and the conduction or cutoff of the corresponding cooling assembly is controlled by the control valves.

7. The cooling device of the hydraulic system according to any one of claims 1 to 6, characterized in that: The cooling assembly comprises: The cooling assembly is supported and mounted on the through hole provided on the lower end surface of the shell through the connecting seat; A cooling pipe; the cooling pipe is spirally arranged and installed at the lower part of the connecting seat; and A pair of hoses; the hoses are respectively connected to the pipeline regulating assembly and the two ends of the cooling pipe, so that the cooling pipe forms a water circulation through the hoses and the pipeline regulating assembly.

8. The cooling device for a hydraulic system according to claim 7, characterized in that: The cooling device further comprises a plurality of lifting assemblies, wherein the lifting assemblies correspond in position to each of the cooling assemblies, and the lifting assemblies are suitable for driving the corresponding cooling assemblies to be lifted from the oil tank or placed into the oil tank.

9. The cooling device for a hydraulic system according to claim 8, characterized in that: The lifting assembly comprises: A magnetic conductive sleeve; the magnetic conductive sleeve is fixedly installed at the center of the connecting seat; and Electromagnetic column; the electromagnetic column is fixedly installed on the shell and plugged with the magnetic sleeve; the electromagnetic column generates magnetic fields in different directions by connecting currents in different directions, thereby driving the magnetic sleeve to drive the connecting seat and the cooling pipe to move vertically up and down.

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