Hydraulic valve element with built-in impurity removal mechanism

Abstract

The utility model provides a hydraulic valve core with a built-in impurity removal mechanism, which belongs to the technical field of hydraulic valves and comprises a valve sleeve and a valve core arranged on the valve sleeve, a sealing ring is sleeved at the rear end of the valve sleeve and mounted in a hydraulic valve body, and the valve core is mounted in the valve sleeve. Hydraulic oil is prevented from directly entering a gap between the valve sleeve and the valve element through the guide groove formed in the front end of the valve element, the hydraulic oil is filtered through the filtering sleeve arranged on one side of the collecting groove, and meanwhile metal impurities in the hydraulic oil are further adsorbed and cleaned through the magnet rings installed on the inner walls of the two sides of the collecting groove. Therefore, blockage of filter holes in the filter sleeve caused by accumulation of excessive metal impurities is avoided, the impurity removal effect is improved while the filter effect of the filter sleeve is kept, hydraulic oil entering the gap between the valve sleeve and the valve element is kept pure, the valve element can flexibly move on the inner wall of the valve sleeve, and the service life of the valve element is prolonged. The problem that the valve element is inconvenient to move and stuck due to the fact that impurities enter gaps is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valves, and particularly relates to a hydraulic valve core with an internal impurity removal mechanism. Background Art

[0002] The function of a hydraulic control valve (referred to as a hydraulic valve for short) in a hydraulic system is to control and regulate the flow direction, pressure and flow rate of the hydraulic oil in the hydraulic system, so that the actuator and its driven working mechanism can obtain the required movement direction, thrust (torque) and movement speed (rotation speed), etc. Generally, it includes a pressure control valve, a flow control valve and a direction control valve, etc. A hydraulic valve usually includes a valve body, a hydraulic valve core arranged in the valve body and an elastic member. The valve core is driven to move backward under the pressure of the pipeline to open the valve port of the valve body. After losing the pressure of the pipeline, the valve core can be reset under the action of the elastic member to close the valve port of the valve body.

[0003] In the prior art, during the operation of a hydraulic system, the moving parts in the hydraulic system may be worn during long-term operation, generating metal chips and wear particles. These particles will mix into the hydraulic oil to become impurities. And during the assembly or maintenance of the hydraulic system, if the operation is improper, impurities may be introduced. At the same time, when replacing the hydraulic oil, if the old oil is not completely discharged or the new oil is not filtered, impurities may be introduced. When these impurity particles remain between the valve core and the valve sleeve along with the hydraulic oil, the long-term accumulation of impurities easily leads to problems such as inconvenient movement or even jamming of the valve core, resulting in the failure of the one-way sealing function of the hydraulic valve core assembly. How to invent a hydraulic valve core with an internal impurity removal mechanism to improve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a hydraulic valve core with an internal impurity removal mechanism, aiming to improve the problem that when impurities generated during the operation of the hydraulic system remain between the valve core and the valve sleeve along with the hydraulic oil, it causes inconvenient movement or even jamming of the valve core.

[0005] The utility model is realized as follows:

[0006] The utility model provides a hydraulic valve core with an internal impurity removal mechanism, including a valve sleeve and a valve core arranged on the valve sleeve. The rear end of the valve sleeve is sleeved with a sealing ring and installed inside the hydraulic valve body;

[0007] The spool is installed inside the valve sleeve. A spring that abuts against the inner wall of the valve body is installed on the inner wall at the rear end of the spool. A guiding groove is formed on the outer wall at one end of the spool away from the spring, and a collecting groove is formed on the outer wall at one end of the spool close to the spring. A slot is formed outside the collecting groove, and a sealing groove is formed on the outer wall at one end of the spool close to the slot. A sealing ring is installed on the inner wall of the sealing groove. A through hole is formed between the guiding groove and the collecting groove, and a filter sleeve is installed on the outer wall of the slot.

[0008] Preferably, the inner wall of the valve sleeve is slidably connected to the outer wall of the spool, and one end of the spool plugs one end of the valve sleeve.

[0009] Preferably, the guiding groove is an annular groove formed on the outer wall of the spool, and several through holes are circumferentially formed between the guiding groove and the collecting groove.

[0010] Preferably, the outer wall of the slot is slidably connected to the inner wall of the filter sleeve, and the position at the rear end of the spool close to the sealing ring is in sealing fit with the inner wall of the valve sleeve.

[0011] Preferably, one end of the sealing ring is in sealing contact with one end of the filter sleeve.

[0012] By adopting the above technical solution, when the spool is pushed open, part of the hydraulic oil enters the guiding groove along the outer wall of the spool and enters the collecting groove under the action of pressure. After being filtered by the filter sleeve to remove impurities, it enters the gap between the spool and the valve sleeve and moves towards the front end of the spool to prevent the subsequent hydraulic oil from directly entering the gap between the valve sleeve and the spool, thereby filtering the hydraulic oil entering the gap between the valve sleeve and the spool and avoiding the problems of inconvenient movement and jamming of the spool caused by impurities entering the gap.

[0013] Preferably, mounting grooves are formed on the inner walls on both sides of the collecting groove, and magnetic ring is installed on the inner walls of the mounting grooves.

[0014] Preferably, the magnetic ring extends into the inner wall of the mounting groove, and the end of the magnetic ring close to the collecting groove is not flush with the opening of the mounting groove.

[0015] By adopting the above technical solution, while the filter sleeve in the collecting groove filters the hydraulic oil, the magnetic ring adsorbs and collects the metal chips in the hydraulic oil in the collecting groove, enabling the metal chips to enter the mounting groove for cleaning. At the same time, it avoids blockage of the filter sleeve caused by excessive fixed impurities and improves the impurity removal effect.

[0016] The beneficial effects of the present utility model are:

[0017] By providing a guiding groove at the front end of the valve core, direct entry of hydraulic oil into the gap between the valve sleeve and the valve core is avoided. The hydraulic oil is filtered by a filter sleeve provided on one side of the collecting groove. Meanwhile, magnet rings are installed on the inner walls on both sides of the collecting groove to further adsorb and clean metal impurities in the hydraulic oil, thereby preventing excessive accumulation of metal impurities from clogging the filter holes on the filter sleeve, maintaining the filtering effect of the filter sleeve while improving the impurity removal effect, thus keeping the hydraulic oil entering the gap between the valve sleeve and the valve core pure, enabling the valve core to move flexibly within the inner wall of the valve sleeve, and solving the problems of inconvenient movement and jamming of the valve core caused by impurities entering the gap. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of a hydraulic valve core with an internal impurity removal mechanism provided by an embodiment of the present invention;

[0020] Figure 2 is a cross-sectional view of a hydraulic valve core with an internal impurity removal mechanism provided by an embodiment of the present invention;

[0021] Figure 3 is a hydraulic valve core with an internal impurity removal mechanism provided by an embodiment of the present invention Figure 2 schematic diagram of the structure of area A therein;

[0022] Figure 4 is a partial structural schematic diagram of a hydraulic valve core with an internal impurity removal mechanism provided by an embodiment of the present invention;

[0023] Figure 5 is a partial structural half-sectional view of a hydraulic valve core with an internal impurity removal mechanism provided by an embodiment of the present invention;

[0024] Figure 6 is a hydraulic valve core with an internal impurity removal mechanism provided by an embodiment of the present invention Figure 5 enlarged view of the structure of area B therein.

[0025] In the figure: 1, valve sleeve; 2, valve core; 3, guiding groove; 4, collecting groove; 5, through hole; 6, installation groove; 7, slot; 8, sealing groove; 9, magnet ring; 10, filter sleeve; 11, sealing ring; 12, spring. Detailed Embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the scope of protection of the present utility model.

[0027] Example, refer to Figures 1 - 6 , a hydraulic valve core with an internal impurity removal mechanism, including a valve sleeve 1 and a valve core 2 provided on the valve sleeve 1. The rear end of the valve sleeve 1 is sleeved with a sealing ring and installed inside the hydraulic valve body;

[0028] The valve core 2 is installed inside the valve sleeve 1. A spring 12 that abuts against the inner wall of the valve body is installed on the inner wall of the rear end of the valve core 2. A guiding groove 3 is provided on the outer wall of the end of the valve core 2 away from the spring 12. A collecting groove 4 is provided on the outer wall of the end of the valve core 2 close to the spring 12. A slot 7 is provided outside the collecting groove 4. A sealing groove 8 is provided on the outer wall of the end of the valve core 2 close to the slot 7. A sealing ring 11 is installed on the inner wall of the sealing groove 8. A through hole 5 is provided between the guiding groove 3 and the collecting groove 4. A filter sleeve 10 is installed on the outer wall of the slot 7.

[0029] Furthermore; the inner wall of the valve sleeve 1 is slidably connected to the outer wall of the valve core 2. One end of the valve core 2 plugs one end of the valve sleeve 1. The guiding groove 3 is an annular groove provided on the outer wall of the valve core 2. A plurality of through holes 5 are circumferentially provided between the guiding groove 3 and the collecting groove 4. The outer wall of the slot 7 is slidably connected to the inner wall of the filter sleeve 10. The position of the rear end of the valve core 2 close to the sealing ring 11 is in sealing cooperation with the inner wall of the valve sleeve 1. One end of the sealing ring 11 is in sealing contact with one end of the filter sleeve 10.

[0030] It should be noted that: when one end of the valve core 2 and the valve sleeve 1 is pushed open by hydraulic oil, part of the hydraulic oil enters the guiding groove 3 along the outer wall of the valve core 2 and is pushed through the through hole 5 into the collecting groove 4 under the pressure of the hydraulic oil. The oil is filtered by the filter sleeve 10 to remove impurities and then enters the gap between the valve core 2 and the valve sleeve 1, and moves forward to block the hydraulic oil that directly enters the gap without passing through the filter, so as to keep the hydraulic oil entering the gap between the valve sleeve 1 and the valve core 2 pure, enabling the valve core 2 to move flexibly inside the inner wall of the valve sleeve 1 and avoiding problems such as inconvenient movement and jamming of the valve core 2 caused by impurities entering the gap.

[0031] Furthermore; mounting grooves 6 are provided on the inner walls of both sides of the collecting groove 4. Magnet rings 9 are installed on the inner walls of the mounting grooves 6. The magnet rings 9 extend into the inner walls of the mounting grooves 6. One end of the magnet ring 9 close to the collecting groove 4 is not flush with the opening of the mounting groove 6.

[0032] It should be noted that while the filter sleeve 10 in the collection tank 4 filters the hydraulic oil, the magnet ring 9 adsorbs and collects the metal chips in the hydraulic oil in the collection tank 4, causing the metal chips to enter the interior of the installation groove 6 and adhere to the outer wall of the magnet ring 9, thereby preventing excessive accumulation of metal impurities from clogging the filter holes of the filter sleeve 10, maintaining the filtering effect of the filter sleeve 10 while improving the impurity removal effect.

[0033] The working principle of the hydraulic valve core with an internal impurity removal mechanism is as follows:

[0034] When one end of the valve core 2 and the valve sleeve 1 is pushed open by the hydraulic oil, part of the hydraulic oil enters the guide groove 3 along the outer wall of the valve core 2 and is pushed through the through hole 5 under the pressure of the hydraulic oil into the collection tank 4. The oil passes through the filter sleeve 10 to filter out impurities and then enters the gap between the valve core 2 and the valve sleeve 1. At the same time, the magnet ring 9 adsorbs and collects the metal chips in the hydraulic oil in the collection tank 4, causing the metal chips to enter the interior of the installation groove 6 and adhere to the outer wall of the magnet ring 9, thereby preventing excessive accumulation of metal impurities from clogging the filter holes of the filter sleeve 10. The filtered oil enters the gap between the valve core 2 and the valve sleeve 1 and moves towards the front end of the valve core 2, blocking the oil that directly enters the gap without being filtered later, thereby maintaining the purity of the hydraulic oil entering the gap between the valve sleeve 1 and the valve core 2, enabling the valve core 2 to move flexibly inside the inner wall of the valve sleeve 1, and effectively preventing impurities from entering the gap and causing problems such as inconvenient movement and jamming of the valve core 2.

[0035] It should be noted that the specific model and specifications of the motor need to be selected and determined according to the actual specifications of the device. The specific selection calculation method uses the existing technology in the field, so it will not be elaborated in detail here.

[0036] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydraulic valve core with an internal impurity removal mechanism, comprising a valve sleeve (1) and a valve core (2) arranged on the valve sleeve (1), characterized in that, A sealing ring is sleeved at the rear end of the valve sleeve (1) and installed inside the hydraulic valve body; The valve core (2) is installed inside the valve sleeve (1). A spring (12) that abuts against the inner wall of the valve body is installed on the inner wall of the rear end of the valve core (2). A guiding groove (3) is formed on the outer wall of one end of the valve core (2) away from the spring (12). A collecting groove (4) is formed on the outer wall of one end of the valve core (2) close to the spring (12). A slot (7) is formed on the outer side of the collecting groove (4). A sealing groove (8) is formed on the outer wall of one end of the valve core (2) close to the slot (7). A sealing ring (11) is installed on the inner wall of the sealing groove (8). A through hole (5) is formed between the guiding groove (3) and the collecting groove (4). A filter sleeve (10) is installed on the outer wall of the slot (7).

2. The hydraulic valve core with an internal impurity removal mechanism according to claim 1, characterized in that, The inner wall of the valve sleeve (1) is slidably connected to the outer wall of the valve core (2), and one end of the valve core (2) plugs one end of the valve sleeve (1).

3. The hydraulic valve core with an internal impurity removal mechanism according to claim 2, characterized in that, The guiding groove (3) is an annular groove formed on the outer wall of the valve core (2), and a plurality of the through holes (5) are circumferentially formed between the guiding groove (3) and the collecting groove (4).

4. A hydraulic valve core with an internal impurity removal mechanism according to claim 3, characterized in that, The outer wall of the slot (7) is slidably connected to the inner wall of the filter sleeve (10), and the position of the rear end of the valve core (2) close to the sealing ring (11) is in sealing fit with the inner wall of the valve sleeve (1).

5. A hydraulic valve core with an internal impurity removal mechanism according to claim 4, characterized in that, One end of the sealing ring (11) is in sealing contact with one end of the filter sleeve (10).

6. A hydraulic valve core with an internal impurity removal mechanism according to claim 1, characterized in that, Mounting grooves (6) are formed on the inner walls of both sides of the collecting groove (4), and magnet rings (9) are installed on the inner walls of the mounting grooves (6).

7. The hydraulic valve core with an internal impurity removal mechanism according to claim 6, characterized in that, The magnet rings (9) extend into the inner walls of the mounting grooves (6), and one end of the magnet rings (9) close to the collecting groove (4) is not flush with the opening of the mounting groove (6).

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