Oil cylinder with hydraulic oil backflow structure

Abstract

The utility model discloses an oil cylinder with a hydraulic oil backflow structure, and relates to the technical field of oil cylinders. The oil cylinder comprises an oil cylinder main body, a temperature control assembly and a filtering assembly, a temperature measuring assembly is arranged between the temperature control assembly and the filtering assembly; the temperature control assembly comprises a liquid storage tank, a circulating pump and an oil passing sleeve, the oil passing sleeve fixedly sleeves the oil cylinder body, the oil passing sleeve is fixedly sleeved with a heat conduction device, the heat conduction device is fixedly sleeved with a heat exchange sleeve, the output end of the circulating pump communicates with the heat exchange sleeve, and the input end of the circulating pump communicates with the liquid storage tank. An oil return opening of the oil cylinder body is communicated with the oil passing sleeve, and an electric heating rod is installed in the liquid storage tank. The heat exchange liquid in the liquid storage tank exchanges heat with the hydraulic oil, the hydraulic oil can be rapidly cooled, the hydraulic oil is prevented from going bad, the hydraulic oil can be heated through the high-temperature heat exchange liquid, and the situation that the fluidity of the hydraulic oil is reduced and normal use of the oil cylinder is affected due to the fact that the hydraulic oil is too sticky at the low temperature is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil cylinders, and particularly relates to an oil cylinder with a hydraulic oil return structure. Background Technique

[0002] As the core actuator of the hydraulic system, the hydraulic cylinder is responsible for converting hydraulic energy into mechanical energy. Through the linear reciprocating motion or limited-angle swing of the piston in the cylinder body, the hydraulic cylinder realizes the transmission and conversion of power. In this process, the hydraulic cylinder not only undertakes the important responsibility of outputting linear thrust and pulling force, but also can flexibly adjust the output force and movement speed according to the specific requirements of the hydraulic system to adapt to the operation requirements under various complex working conditions. The application range of the hydraulic cylinder is extremely wide, and it is required to play a role in both heavy hydraulic machinery and precision injection molding machinery.

[0003] However, when the temperature of the hydraulic oil in the oil cylinder is too high, it will cause a significant change in the viscosity of the hydraulic oil, thus affecting its sealing performance and working efficiency. It will also cause the volume of the oil to expand, increase the pressure in the fuel tank, and even cause the oil to overflow. In addition, high temperature will accelerate the oxidation process of the hydraulic oil, resulting in the deterioration of the oil, generating sediment and acidic substances. These substances may corrode the metal components in the system, further shortening the service life of the oil. When the temperature is too low, the fluidity of the oil will become poor, resulting in a slower response speed of the system.

[0004] Therefore, we provide an oil cylinder with a hydraulic oil return structure to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an oil cylinder with a hydraulic oil return structure, which conducts heat exchange between the heat exchange liquid in the liquid storage tank and the hydraulic oil to quickly cool down the hydraulic oil, and can heat the hydraulic oil through the high-temperature heat exchange liquid, solving the problem that the hydraulic oil in the existing oil cylinder is easily affected by temperature.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model is an oil cylinder with a hydraulic oil return structure, including an oil cylinder main body, a temperature control component and a filtering component; the temperature control component and the filtering component are both arranged outside the oil cylinder main body, and a temperature measuring component is arranged between the temperature control component and the filtering component;

[0008] The temperature control component includes a liquid storage tank, a circulation pump and an oil passing sleeve. The oil passing sleeve is fixedly sleeved outside the oil cylinder main body, a heat conductor is fixedly sleeved outside the oil passing sleeve, a heat exchange sleeve is fixedly sleeved outside the heat conductor, the output end of the circulation pump is communicated with the heat exchange sleeve, the input end of the circulation pump is communicated with the liquid storage tank, and the oil return port of the oil cylinder main body is communicated with the oil passing sleeve;

[0009] The filter component includes an upper housing and a lower housing. A plurality of filter chambers are provided inside both the upper housing and the lower housing. A filter element is installed inside the filter chamber. An oil drain pipe is provided at the top of the upper housing, and an oil inlet is provided at the bottom of the lower housing.

[0010] The present utility model is further configured such that an oil suction pipe is fixedly connected inside the liquid storage tank. A liquid extraction pipe is installed between the oil suction pipe and the input end of the circulation pump. An electric heating rod is installed inside the liquid storage tank.

[0011] The present utility model is further configured such that a liquid inlet is provided at the bottom of the heat exchange sleeve. A liquid delivery pipe is installed between the liquid inlet and the output end of the circulation pump. A liquid outlet is provided at the top of the heat exchange sleeve. A liquid return pipe is installed between the liquid outlet and the liquid storage tank.

[0012] The present utility model is further configured such that an oil inlet is provided at the top of the oil passing sleeve. An oil return pipe is installed between the oil inlet and the oil return port of the cylinder body. An oil outlet is provided at the bottom of the oil passing sleeve.

[0013] The present utility model is further configured such that the temperature measuring component includes a temperature measuring chamber. A temperature sensor is installed inside the temperature measuring chamber. An oil inlet pipe is installed between the temperature measuring chamber and the oil outlet, and an oil outlet pipe is installed between the temperature measuring chamber and the oil inlet.

[0014] The present utility model is further configured such that a three-way pipe is installed at the top of the oil drain pipe. A pressure gauge is installed at one of the installation ports of the three-way pipe.

[0015] The present utility model is further configured such that a gasket is placed between the upper housing and the lower housing. The upper housing and the lower housing are connected by a plurality of bolts.

[0016] The present utility model is further configured such that a plurality of filter chambers are arranged side by side, and a communicating pipe is installed between adjacent filter chambers.

[0017] The present utility model has the following beneficial effects:

[0018] 1. In the present utility model, the hydraulic oil exchanges heat with the heat exchange liquid in the liquid storage tank, which can quickly cool down the hydraulic oil, thereby avoiding the deterioration of the hydraulic oil. The high-temperature heat exchange liquid can heat the hydraulic oil, thereby avoiding the reduction of fluidity caused by the excessive viscosity of the hydraulic oil at low temperatures and affecting the normal use of the cylinder.

[0019] 2. In the present utility model, the communicating pipe allows the hydraulic oil to pass through a plurality of filter chambers in sequence, so that the hydraulic oil can be filtered by the filter element in the filter chamber, ensuring the quality of the hydraulic oil and extending the service life of the hydraulic oil.

[0020] Of course, it is not necessary for any product implementing the present utility model to achieve all the above-mentioned advantages simultaneously. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0023] Figure 2 It is a sectional structural schematic diagram of the liquid storage tank.

[0024] Figure 3 It is a structural schematic diagram of the heat exchange sleeve, oil passing sleeve and heat conductor.

[0025] Figure 4 It is an exploded structural schematic diagram of the filter assembly.

[0026] Figure 5 For Figure 1 an enlarged structural schematic diagram of part A in

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] 100 - oil cylinder body, 200 - temperature control component, 201 - liquid storage tank, 201a - oil suction pipe, 201b - electric heating rod, 202 - circulation pump, 203 - liquid extraction pipe, 204 - heat exchange sleeve, 204a - liquid inlet, 204b - liquid outlet, 205 - liquid delivery pipe, 206 - return pipe, 207 - oil passing sleeve, 207a - oil inlet, 207b - oil outlet, 208 - heat conductor, 208a - heat absorption sleeve, 208b - heat dissipation fins, 209 - oil return pipe, 300 - filter assembly, 301 - upper shell, 302 - lower shell, 303 - filter chamber, 304 - filter element, 305 - connecting pipe, 306 - drain pipe, 307 - upper oil port, 308 - tee, 309 - pressure gauge, 310 - gasket, 400 - temperature measurement component, 401 - temperature measurement chamber, 402 - oil inlet pipe, 403 - oil outlet pipe, 404 - temperature sensor. Detailed Embodiments

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0030] Example 1, please refer to Figure 1-3 and Figure 5 , the utility model is an oil cylinder with a hydraulic oil return structure, which includes an oil cylinder main body 100, a temperature control component 200 and a filtering component 300; the temperature control component 200 and the filtering component 300 are both arranged outside the oil cylinder main body 100, and a temperature measuring component 400 is arranged between the temperature control component 200 and the filtering component 300;

[0031] The temperature control component 200 includes a liquid storage tank 201, a circulation pump 202 and an oil passing sleeve 207. The oil passing sleeve 207 is fixedly sleeved outside the oil cylinder main body 100. A heat conductor 208 is fixedly sleeved outside the oil passing sleeve 207, and a heat exchange sleeve 204 is fixedly sleeved outside the heat conductor 208. The output end of the circulation pump 202 is communicated with the heat exchange sleeve 204, the input end of the circulation pump 202 is communicated with the liquid storage tank 201, and the oil return port of the oil cylinder main body 100 is communicated with the oil passing sleeve 207. By performing heat exchange between the heat exchange liquid in the liquid storage tank 201 and the hydraulic oil, the hydraulic oil can be quickly cooled, thereby avoiding the deterioration of the hydraulic oil. The hydraulic oil can be heated by the high-temperature heat exchange liquid, thereby avoiding the decrease in fluidity caused by the excessive viscosity of the hydraulic oil at low temperature and affecting the normal use of the oil cylinder;

[0032] The temperature measuring component 400 includes a temperature measuring chamber 401. A temperature sensor 404 is installed inside the temperature measuring chamber 401. An oil inlet pipe 402 is installed between the temperature measuring chamber 401 and the oil outlet 207b, and an oil outlet pipe 403 is installed between the temperature measuring chamber 401 and the upper oil port 307. The temperature of the hydraulic oil can be measured by the temperature sensor 404.

[0033] Specifically, an oil suction pipe 201a is fixedly connected inside the liquid storage tank 201. A liquid extraction pipe 203 is installed between the oil suction pipe 201a and the input end of the circulation pump 202. An electric heating rod 201b is installed inside the liquid storage tank 201;

[0034] The bottom of the heat exchange sleeve 204 is provided with a liquid inlet 204a. A liquid delivery pipe 205 is installed between the liquid inlet 204a and the output end of the circulation pump 202. The top of the heat exchange sleeve 204 is provided with a liquid outlet 204b. A liquid return pipe 206 is installed between the liquid outlet 204b and the liquid storage tank 201.

[0035] Furthermore, the top of the oil passing sleeve 207 is provided with an oil inlet 207a. An oil return pipe 209 is installed between the oil inlet 207a and the oil return port of the oil cylinder main body 100. The bottom of the oil passing sleeve 207 is provided with an oil outlet 207b.

[0036] The operation process of this embodiment is as follows: When adjusting the temperature of the hydraulic oil, first, the hydraulic oil flows into the interior of the oil sleeve 207 through the return oil pipe 209. Then, the heat of the hydraulic oil exchanges heat with the heat exchange liquid in the heat exchange sleeve 204 through the heat conductor 208, thereby cooling the hydraulic oil. Then, the circulation pump 202 is started to pump the low-temperature heat exchange liquid out of the liquid storage tank 201, and then it is transported to the heat exchange sleeve 204 through the liquid delivery pipe 205. Then, the high-temperature heat exchange liquid flows back into the interior of the liquid storage tank 201 through the return liquid pipe 206. After that, the hydraulic oil flows into the interior of the temperature measurement chamber 401 through the oil inlet pipe 402. Then, the temperature of the hydraulic oil can be detected by the temperature sensor 404. When the temperature of the hydraulic oil is too high, the heat exchange liquid is heated by the electric heating rod 201b, and then the heat conductor 208 can heat the hydraulic oil in the oil sleeve 207.

[0037] Embodiment 2. Please refer to Figure 4 , on the basis of the specific Embodiment 1, the filtering assembly 300 includes an upper housing 301 and a lower housing 302. A plurality of filtering chambers 303 are arranged inside both the upper housing 301 and the lower housing 302. A filtering element 304 is installed inside the filtering chamber 303. A drain pipe 306 is arranged at the top of the upper housing 301, and an oil inlet 307 is arranged at the bottom of the lower housing 302. The hydraulic oil can be filtered by the arranged filtering element 304 to ensure the quality of the hydraulic oil and extend the service life of the hydraulic oil.

[0038] Specifically, a tee pipe 308 is installed at the top of the drain pipe 306, and a pressure gauge 309 is installed at one of the installation ports of the tee pipe 308. The arranged pressure gauge 309 can detect in time when the filtering element 304 is blocked and prompt the staff to replace it in time;

[0039] A plurality of filtering chambers 303 are arranged side by side, and a connecting pipe 305 is installed between adjacent filtering chambers 303.

[0040] Furthermore, a gasket 310 is placed between the upper housing 301 and the lower housing 302, and the upper housing 301 and the lower housing 302 are connected by a plurality of bolts.

[0041] The operation process of this embodiment is as follows: When the hydraulic oil needs to be filtered, the hydraulic oil enters the interior of the lower housing 302 through the oil outlet pipe 403, and then the hydraulic oil can sequentially pass through a plurality of filtering chambers 303 through the connecting pipe 305, so that the hydraulic oil can be filtered by the filtering element 304 in the filtering chamber 303.

[0042] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0043] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can understand and utilize the present utility model well. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An oil cylinder with a hydraulic oil return structure, comprising an oil cylinder body (100), a temperature control component (200) and a filtering component (300); characterized in that: The temperature control component (200) and the filtration component (300) are both arranged outside the oil cylinder body (100), and a temperature measurement component (400) is arranged between the temperature control component (200) and the filtration component (300); The temperature control component (200) includes a liquid storage tank (201), a circulation pump (202) and an oil passing sleeve (207). The oil passing sleeve (207) is fixedly sleeved outside the oil cylinder body (100). A heat conductor (208) is fixedly sleeved outside the oil passing sleeve (207). A heat exchange sleeve (204) is fixedly sleeved outside the heat conductor (208). The output end of the circulation pump (202) is communicated with the heat exchange sleeve (204), the input end of the circulation pump (202) is communicated with the liquid storage tank (201), and the oil return port of the oil cylinder body (100) is communicated with the oil passing sleeve (207); The filtration component (300) includes an upper shell (301) and a lower shell (302). A plurality of filtration chambers (303) are arranged inside the upper shell (301) and the lower shell (302). A filtration filter element (304) is installed inside the filtration chamber (303). An oil discharge pipe (306) is arranged at the top of the upper shell (301), and an oil inlet (307) is arranged at the bottom of the lower shell (302).

2. The hydraulic cylinder with a hydraulic oil return structure according to claim 1, characterized in that, An oil suction pipe (201a) is fixedly connected inside the liquid storage tank (201). A liquid extraction pipe (203) is installed between the oil suction pipe (201a) and the input end of the circulation pump (202). An electric heating rod (201b) is installed inside the liquid storage tank (201).

3. The hydraulic cylinder with a hydraulic oil reflux structure according to claim 1, characterized in that, A liquid inlet (204a) is arranged at the bottom of the heat exchange sleeve (204). A liquid delivery pipe (205) is installed between the liquid inlet (204a) and the output end of the circulation pump (202). A liquid outlet (204b) is arranged at the top of the heat exchange sleeve (204). A liquid return pipe (206) is installed between the liquid outlet (204b) and the liquid storage tank (201).

4. The oil cylinder with a hydraulic oil return structure according to claim 1, characterized in that, An oil inlet (207a) is arranged at the top of the oil passing sleeve (207). An oil return pipe (209) is installed between the oil inlet (207a) and the oil return port of the oil cylinder body (100). An oil outlet (207b) is arranged at the bottom of the oil passing sleeve (207).

5. A hydraulic cylinder with a hydraulic oil return structure according to claim 1, characterized in that, The temperature measurement component (400) includes a temperature measurement chamber (401). A temperature sensor (404) is installed inside the temperature measurement chamber (401). An oil inlet pipe (402) is installed between the temperature measurement chamber (401) and the oil outlet (207b). An oil outlet pipe (403) is installed between the temperature measurement chamber (401) and the oil inlet (307).

6. A hydraulic cylinder with a hydraulic oil return structure according to claim 1, characterized in that, A three-way pipe (308) is installed at the top of the oil discharge pipe (306). A pressure gauge (309) is installed at one of the installation ports of the three-way pipe (308).

7. The oil cylinder with a hydraulic oil return structure according to claim 1, characterized in that, A sealing gasket (310) is placed between the upper shell (301) and the lower shell (302). The upper shell (301) and the lower shell (302) are connected by a plurality of bolts.

8. The oil cylinder with a hydraulic oil return structure according to claim 1, characterized in that, A plurality of the filtering bins (303) are arranged side by side, and a communicating pipe (305) is installed between adjacent filtering bins (303).

Images