Hydraulic protection device for electro-hydraulic servo control system
By introducing a combination of filter plates, fine filters, and self-priming pump magnets into the electro-hydraulic servo control system, the problem of hydraulic oil clogging by impurities was solved, achieving high oil purity and stable equipment operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING LONGHANG GUOJIAN ELECTRONIC TECH CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-26
AI Technical Summary
In existing electro-hydraulic servo control systems, metallic impurities in the hydraulic oil can easily clog the oil inlet pipe, leading to insufficient flow and abnormal pressure. Furthermore, traditional filters require tedious manual cleaning and are prone to causing secondary pollution.
A hydraulic protection device comprising a housing, filter plates, a fine filter screen, a self-priming pump, and a magnet was designed. The device intercepts metallic impurities through two layers of filter plates, filters fine impurities through the fine filter screen, cleans impurities through the self-priming pump, and adsorbs and settles impurities through the magnet, thus achieving automated cleaning.
It achieves high-purity oil output, simplifies the impurity cleaning process, avoids secondary pollution caused by manual operation, and ensures stable equipment operation.
Smart Images
Figure CN224414027U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electro-hydraulic servo system technology, specifically to a hydraulic protection device for an electro-hydraulic servo control system. Background Technology
[0002] Electro-hydraulic servo control systems are advanced control technologies that combine the advantages of electronic and hydraulic technologies to achieve high-precision and rapid-response control. Such systems typically consist of an electronic amplifier, an electro-hydraulic servo valve, a hydraulic actuator, and corresponding sensors and feedback elements. In an electro-hydraulic servo control system, the electronic amplifier receives the weak electrical signal from the controller and amplifies it sufficiently to drive the electro-hydraulic servo valve. The electro-hydraulic servo valve is the core component of the system; it precisely regulates the flow and direction of hydraulic oil based on the input electrical signal, thereby controlling the movement of the hydraulic actuator (such as a hydraulic cylinder or hydraulic motor).
[0003] However, in existing technologies, during the operation of servo actuators, metallic impurities in the hydraulic oil can easily clog the inlet pipe, leading to insufficient flow, abnormal pressure, or even jamming and failure. In severe cases, this can cause internal wear or permanent damage to the actuator. Although most filters use a fixed structure or threaded connection, disassembly requires tools, and reinstallation after cleaning may result in leakage due to poor sealing. Traditional filter screens can only trap impurities and cannot automatically separate or discharge them, requiring manual cleaning of the impurities adhering to the filter screen surface, which is cumbersome and prone to secondary pollution. Therefore, we provide a hydraulic protection device for an electro-hydraulic servo control system. Utility Model Content
[0004] The purpose of this invention is to provide a hydraulic protection device for an electro-hydraulic servo control system to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic protection device for an electro-hydraulic servo control system, comprising a housing, a sealing cover provided at a slot on the top of the housing, an inlet pipe provided on one side of the top of the housing, a pipe plug provided at the top of the inlet pipe, two filter plates provided inside the housing, a fine filter screen provided at the end of the housing away from the inlet pipe, a self-priming pump provided on one side of the housing, a delivery pipe provided at the top of the self-priming pump, a magnet provided at the end of the delivery pipe away from the self-priming pump, a collection box provided inside the self-priming pump, and a support mechanism provided at the bottom of the housing.
[0006] As a further preferred embodiment of this technical solution, the support mechanism includes a support platform, and the bottom of the support platform is fixedly connected with three anti-slip feet.
[0007] As a further preferred embodiment of this technical solution, the top of the support platform is fixedly installed to the bottom of the housing, and the bottom of the self-priming pump is fixedly installed on the top of the support platform.
[0008] As a further preferred embodiment of this technical solution, a sealing cover is movably connected to the slot at the top of the housing via a hinge, and an inlet pipe is fixedly connected to one side of the top of the housing.
[0009] As a further preferred embodiment of this technical solution, a pipe plug is connected to the top of the inlet pipe, two filter plates are installed inside the housing, and a fine filter screen is fixedly installed at the end of the housing away from the inlet pipe.
[0010] As a further preferred embodiment of this technical solution, the output end of the self-priming pump is fixedly connected to one end of the delivery pipe, and the other end of the delivery pipe extends through one side of the housing into the housing.
[0011] As a further preferred embodiment of this technical solution, a magnet is attached to the end of the delivery pipe away from the self-priming pump, and a collection box is installed inside the self-priming pump.
[0012] This utility model provides a hydraulic protection device for an electro-hydraulic servo control system, which has the following beneficial effects:
[0013] (1) This utility model can block some metal impurities in the oil by using two filter plates, while the pure oil flows to the output end of the housing through the holes of the filter plates. In addition, the fine filter screen can filter and block the small impurities in the oil, ensuring the purity of the oil after hydraulic discharge. When it is necessary to clean the metal impurities deposited inside the housing, a magnet can be used to adsorb the metal impurities deposited inside the housing. The self-priming pump can be started to suck up the remaining impurities inside the housing, ensuring the cleanliness of the inside of the housing.
[0014] (2) The present invention can provide effective support for the equipment through the support platform and anti-slip feet. The anti-slip feet can increase the friction with the ground, provide anti-slip effect, and ensure the stability of the equipment during use. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the hydraulic protection device of an electro-hydraulic servo control system according to the present invention.
[0016] Figure 2 This is a cross-sectional side view of the hydraulic protection device of an electro-hydraulic servo control system according to the present invention.
[0017] Figure 3 This is a partial disassembly view of the hydraulic protection device of an electro-hydraulic servo control system according to this utility model.
[0018] Figure 4 This is a side view of the support mechanism of the hydraulic protection device of an electro-hydraulic servo control system according to this utility model.
[0019] In the diagram: 11. Shell; 12. Sealing cap; 13. Inlet pipe; 14. Pipe plug; 15. Filter plate; 16. Fine filter screen; 17. Self-priming pump; 18. Delivery pipe; 19. Collection box; 110. Magnet;
[0020] 2. Support mechanism; 21. Support platform; 22. Anti-slip feet. Detailed Implementation
[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0022] This utility model provides a technical solution: such as Figures 1-4 As shown, in this embodiment, a hydraulic protection device for an electro-hydraulic servo control system includes a housing 11. A sealing cover 12 is provided at a slot on the top of the housing 11. An inlet pipe 13 is provided on one side of the top of the housing 11. The sealing cover 12 is movably connected to the slot on the top of the housing 11 via a hinge. The inlet pipe 13 is fixedly connected to one side of the top of the housing 11. A pipe plug 14 is provided at the top of the inlet pipe 13. Two filter plates 15 are provided inside the housing 11. A fine filter screen 16 is provided at the end of the housing 11 away from the inlet pipe 13. The pipe plug 14 is connected to the top of the inlet pipe 13. Two filter plates 15 are installed inside the housing 11. A fine filter screen 16 is fixedly installed at the end of the body 11 away from the liquid inlet pipe 13. A self-priming pump 17 is provided on one side of the body 11. A delivery pipe 18 is provided on the top of the self-priming pump 17. The output end of the top of the self-priming pump 17 is fixedly connected to one end of the delivery pipe 18. The other end of the delivery pipe 18 extends through one side of the body 11 into the interior of the body 11. A magnet 110 is provided at the end of the delivery pipe 18 away from the self-priming pump 17. A collection box 19 is provided inside the self-priming pump 17. A magnet 110 is attracted to the end of the delivery pipe 18 away from the self-priming pump 17. The collection box 19 is installed inside the self-priming pump 17. A support mechanism 2 is provided at the bottom of the body 11.
[0023] In this embodiment, when the device is needed, oil can be delivered to the housing 11 through the inlet pipe 13. Two filter plates 15 can block some metallic impurities in the oil, while pure oil flows through the pores of the filter plates 15 to the output end of the housing 11. Furthermore, a fine filter screen 16 can filter out small impurities in the oil, ensuring the purity of the oil after hydraulic discharge. When the two filter plates 15 inside the housing 11 need to be removed for cleaning, the sealing cover 12 of the housing 11 can be opened, allowing the two filter plates 15 to be removed for cleaning. A pipe plug 14 can block the inlet end of the inlet pipe 13. When cleaning the metal impurities deposited inside the housing 11, the magnet 110 can be used to adsorb the metal impurities deposited inside the housing 11, and the self-priming pump 17 can be started to suck up the remaining impurities inside the housing 11 to ensure the cleanliness of the inside of the housing 11. The sucked impurities will be transferred to the collection box 19 through the delivery pipe 18, and the impurities will be collected and processed through the collection box 19. Since the top of the magnet 110 is adsorbed on the outside of the delivery pipe 18, when the oil is introduced from the inlet pipe 13, some of the mixed metal impurities will be adsorbed on the magnet 110. When it is necessary to remove the magnet 110, simply open the sealing cover 12 and remove the magnet 110 from the delivery pipe 18.
[0024] like Figures 1-4 As shown, the support mechanism 2 includes a support platform 21, with three anti-slip feet 22 fixedly connected to the bottom of the support platform 21. The top of the support platform 21 is fixedly installed to the bottom of the housing 11, and the bottom of the self-priming pump 17 is fixedly installed on the top of the support platform 21.
[0025] In this embodiment, the provided support platform 21 and anti-slip feet 22 can provide effective support for the equipment. The anti-slip feet 22 can increase the friction with the ground, provide an anti-slip effect, and ensure the stability of the equipment during use.
[0026] This utility model provides a hydraulic protection device for an electro-hydraulic servo control system, the specific working principle of which is as follows:
[0027] When the device is needed, the oil is delivered to the housing 11 through the inlet pipe 13. First, it passes through two layers of filter plates 15, effectively blocking metallic impurities such as iron filings and copper particles. The pure oil then flows through the pores of the filter plates 15 to the output end of the housing 11. Furthermore, a fine filter screen 16 further filters and blocks fine impurities in the oil, ensuring the purity of the hydraulic system's output oil. When cleaning the two filter plates 15 inside the housing 11 is required, simply open the sealing cover 12 of the housing 11 to remove and clean the filter plates 15. Simultaneously, the inlet end of the inlet pipe 13 can be blocked by the provided pipe plug 14 to prevent oil leakage. When it is necessary to clean the metal impurities deposited inside the housing 11, the magnet 110 can be used to attract these impurities, and the self-priming pump 17 can be started to suck up the remaining impurities inside the housing 11, ensuring that the inside of the housing 11 remains clean. The sucked-up impurities are transferred to the collection box 19 through the delivery pipe 18 and are centrally processed by the collection box 19. Since the top of the magnet 110 is attracted to the outside of the delivery pipe 18, when the oil is input from the inlet pipe 13, some of the mixed metal impurities will be attracted by the magnet 110. When it is necessary to remove or replace the magnet 110, simply open the sealing cover 12 and remove the magnet 110 from the delivery pipe 18. The operation is simple and does not affect the sealing performance of the device.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A hydraulic protection device for an electro-hydraulic servo control system, comprising a housing (11), characterized in that: A sealing cover (12) is provided at the slot at the top of the housing (11). An inlet pipe (13) is provided on one side of the top of the housing (11). A pipe plug (14) is provided at the top of the inlet pipe (13). Two filter plates (15) are provided inside the housing (11). A fine filter screen (16) is provided at the end of the housing (11) away from the inlet pipe (13). A self-priming pump (17) is provided on one side of the housing (11). A delivery pipe (18) is provided at the top of the self-priming pump (17). A magnet (110) is provided at the end of the delivery pipe (18) away from the self-priming pump (17). A collection box (19) is provided inside the self-priming pump (17). A support mechanism (2) is provided at the bottom of the housing (11).
2. The hydraulic protection device for an electro-hydraulic servo control system according to claim 1, characterized in that: The support mechanism (2) includes a support platform (21), and three anti-slip feet (22) are fixedly connected to the bottom of the support platform (21).
3. The hydraulic protection device for an electro-hydraulic servo control system according to claim 2, characterized in that: The top of the support platform (21) is fixedly installed to the bottom of the housing (11), and the bottom of the self-priming pump (17) is fixedly installed on the top of the support platform (21).
4. The hydraulic protection device for an electro-hydraulic servo control system according to claim 1, characterized in that: A sealing cap (12) is movably connected to the slot at the top of the housing (11) via a hinge, and an inlet pipe (13) is fixedly connected to one side of the top of the housing (11).
5. The hydraulic protection device for an electro-hydraulic servo control system according to claim 1, characterized in that: The top of the inlet pipe (13) is connected to a pipe plug (14), and two filter plates (15) are installed inside the housing (11). A fine filter screen (16) is fixedly installed at the end of the housing (11) away from the inlet pipe (13).
6. The hydraulic protection device for an electro-hydraulic servo control system according to claim 1, characterized in that: The output end of the self-priming pump (17) is fixedly connected to one end of the delivery pipe (18), and the other end of the delivery pipe (18) extends through one side of the housing (11) into the interior of the housing (11).
7. The hydraulic protection device for an electro-hydraulic servo control system according to claim 1, characterized in that: A magnet (110) is attached to one end of the delivery pipe (18) away from the self-priming pump (17), and a collection box (19) is installed inside the self-priming pump (17).