Double-acting balance valve for hydraulic system of walking engineering machinery

Abstract

The invention relates to the technical field of balance valves, in particular to a double-acting balance valve for a hydraulic system of walking engineering machinery, and solves the problems that when an existing hydraulic balance valve is applied to the hydraulic system, one-way flow control and cut-off are generally carried out on hydraulic oil, two-way adjustment cannot be carried out according to the pressure of the hydraulic oil, the control effect is limited, and the service life is long. The hydraulic control valve comprises an electromagnetic adjusting mechanism, a pressurization adjusting mechanism and a valve element flow guide mechanism, the valve element flow guide mechanism is installed between the electromagnetic adjusting mechanism and the pressurization adjusting mechanism, and a valve body is installed on the outer side of the valve element flow guide mechanism; the valve element flow guide mechanism comprises two locking rings, and a plurality of connecting studs are installed between the two locking rings. Two-way flow adjustment and cut-off are conducted on hydraulic oil, pressure balance of a hydraulic system can be effectively met, and sealing failure can be effectively avoided through active pressurization.

Description

Technical Field

[0001] The present invention relates to the technical field of balance valves, and particularly to a double-acting balance valve for a hydraulic system of a walking construction machinery. Background Technique

[0002] The hydraulic system of construction machinery consists of three major parts: a hydraulic oil tank, a hydraulic pump device, and a hydraulic control device. The hydraulic oil tank is equipped with an air filter, an oil filter, a liquid level indicator, a cleaning hole, etc. The hydraulic pump device includes different types of hydraulic pumps, a driving motor, and a coupling between them, etc. The hydraulic control device refers to various valve components and their connectors that make up the hydraulic system. Hydraulic oil plays the roles of transmitting pressure, lubricating, cooling, and sealing in the hydraulic oil system. Control components, namely various hydraulic valves, control and regulate the pressure, flow rate, and direction of the liquid in the hydraulic system. Among them, the hydraulic balance valve is used to adjust the relative balance of the pressures on both sides or achieve the balance of the flow rate through a shunting method.

[0003] When the existing hydraulic balance valve is applied in a hydraulic system, it usually conducts one-way flow control and cut-off of the hydraulic oil, cannot perform two-way adjustment according to the pressure of the hydraulic oil, the control effect is limited, and the shortening of the sealing life is likely to occur when the pressure of the hydraulic oil is too high; Therefore, it does not meet the existing requirements, and for this reason, we propose a double-acting balance valve for a hydraulic system of a walking construction machinery. Summary of the Invention

[0004] The purpose of the present invention is to provide a double-acting balance valve for a hydraulic system of a walking construction machinery, so as to solve the problems raised in the above background technique that when the existing hydraulic balance valve is applied in a hydraulic system, it usually conducts one-way flow control and cut-off of the hydraulic oil, cannot perform two-way adjustment according to the pressure of the hydraulic oil, the control effect is limited, and the shortening of the sealing life is likely to occur when the pressure of the hydraulic oil is too high.

[0005] To achieve the above object, the present invention provides the following technical solutions: A double-acting balance valve for a hydraulic system of a walking construction machinery, comprising an electromagnetic adjustment mechanism, a pressure boosting adjustment mechanism, and a valve core diversion mechanism. A valve core diversion mechanism is installed between the electromagnetic adjustment mechanism and the pressure boosting adjustment mechanism. A valve body is installed outside the valve core diversion mechanism. The valve core diversion mechanism includes two locking rings. A plurality of connecting studs are installed between the two locking rings. A fixed double-headed diversion sleeve is installed inside the two locking rings. Limiting seats are installed on the outer sides of the upper and lower ends of the fixed double-headed diversion sleeve. A plurality of waist-shaped diversion holes are provided on the outer surfaces of the upper and lower ends of the fixed double-headed diversion sleeve. A movable double-headed diversion sleeve is slidably connected to the inside of the fixed double-headed diversion sleeve. A sealing installation ring is installed in the middle of the movable double-headed diversion sleeve. A sealing ring is provided inside the sealing installation ring. A plurality of first diversion channels are provided on the outer surfaces of the upper and lower ends of the movable double-headed diversion sleeve. An upper diversion cover is installed inside the upper end of the movable double-headed diversion sleeve. A lower diversion cover is installed inside the bottom end of the movable double-headed diversion sleeve. A plurality of delivery holes are provided on the surfaces of the lower diversion cover and the upper diversion cover. A bidirectional misaligned diversion core is installed inside the movable double-headed diversion sleeve. A plurality of second diversion channels are provided inside the bidirectional misaligned diversion core.

[0006] Preferably, the electromagnetic adjustment mechanism includes a connecting sleeve. The connecting sleeve is fixedly connected to the upper end of the valve body. An overflow pipe and a seal detection head are installed on the outer side of the middle of the connecting sleeve. An installation sleeve is fixedly installed at the upper end of the connecting sleeve. A first sealing cover is installed inside the bottom end of the installation sleeve. A coil winding is installed on the upper end surface of the first sealing cover. A second sealing cover is installed at the upper end of the coil winding. A movable iron core is slidably connected to the inside of the coil winding. A first support spring is provided at the upper end of the movable iron core. A fixed iron core is installed at the upper end of the first support spring. A first sealing transmission seat is installed at the bottom end of the movable iron core. A first transmission frame is installed on the outer side of the bottom end of the first sealing transmission seat.

[0007] Preferably, the pressure boosting adjustment mechanism includes a valve cover. The valve cover is fixedly connected to the bottom end of the valve body. An air nozzle is installed on the lower end surface of the valve cover. A sealing pressure ring is installed inside the valve cover. A second support spring is provided inside the sealing pressure ring. A second sealing transmission seat is installed at the upper end of the second support spring. A second transmission frame is fixedly installed on the outer side of the upper end of the second sealing transmission seat.

[0008] Preferably, both the overflow pipe and the seal detection head are fixedly connected to the middle of the connecting sleeve. The axes of the overflow pipe and the seal detection head are perpendicular to each other. The overflow pipe is connected to the inside of the connecting sleeve in a through manner. A humidity sensor is provided inside the seal detection head.

[0009] Preferably, the upper and lower ends of the mounting sleeve are threadedly connected to the second sealing cover and the first sealing cover respectively. The mounting sleeve is fixedly connected to the coil winding through the first sealing cover and the second sealing cover. The fixed iron core is fixedly connected to the middle of the second sealing cover. The upper ends of the fixed iron core and the moving iron core are connected by a first support spring. The bottom end of the moving iron core penetrates through the first sealing cover and is fixedly connected to the first transmission bracket through a first sealed transmission seat.

[0010] Preferably, the sealing pressure ring is inserted between the valve cover and the valve body. Sealing rings are provided between the sealing pressure ring and the valve cover and the valve body respectively. The second sealed transmission seat is connected to the valve cover by a second support spring. The air nozzle is threadedly connected to the valve cover. A pressurizing chamber is provided between the valve cover and the second sealed transmission seat. The air nozzle is connected to the pressurizing chamber in a through manner.

[0011] Preferably, both the first sealed transmission seat and the second sealed transmission seat are slidably connected to the valve body. The first sealed transmission seat is located directly above the second sealed transmission seat. Sealing rings are provided between the upper and lower ends of the first sealed transmission seat and the second sealed transmission seat and the valve body respectively. Card slots are provided on the opposite end faces of the lower flow guiding cover and the upper flow guiding cover. The bottom end of the first transmission bracket penetrates through one of the limiting seats and is inserted into the inner side of the card slot. The upper end of the second transmission bracket penetrates through the other limiting seat and is inserted into the inner side of the card slot. The first transmission bracket is snap-fitted and installed with the upper flow guiding cover. The second transmission bracket is snap-fitted and installed with the lower flow guiding cover. Both the first transmission bracket and the second transmission bracket are slidably connected to the two limiting seats.

[0012] Preferably, the two locking rings are symmetrically installed relative to the middle of the valve body. A plurality of connecting stud bolts penetrate through the middle of the valve body and are threadedly connected to the two locking rings. The fixed double-headed flow guiding sleeve is connected to the two locking rings by flat keys respectively. The two ends of the fixed double-headed flow guiding sleeve are threadedly connected to the two limiting seats respectively. The locking rings are in contact with the limiting seats.

[0013] Preferably, the moving double-headed flow guiding sleeve is connected to the sealing ring through a sealing installation ring. The sealing installation ring is composed of two semi-circular rings. The sealing installation ring is slidably connected to the fixed double-headed flow guiding sleeve through the sealing ring. A plurality of waist-shaped flow guiding holes and the first flow guiding groove are arranged in a circular pattern relative to the axis of the moving double-headed flow guiding sleeve.

[0014] Preferably, the multiple second fluid guiding grooves are equally divided into two groups. The first fluid guiding groove at the bottom end of the movable double-head fluid guiding sleeve is connected to one group of the second fluid guiding grooves through a conveying hole on the lower fluid guiding cover, and the first fluid guiding groove on the movable double-head fluid guiding sleeve is connected to the other group of the second fluid guiding grooves through a conveying hole on the upper fluid guiding cover. The multiple conveying holes and the second fluid guiding grooves are all arranged in a circular pattern relative to the axis of the bidirectional misaligned fluid guiding core. The installation directions of every two adjacent second fluid guiding grooves are opposite, and the multiple second fluid guiding grooves are installed in one-to-one correspondence with the conveying holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention can prevent the fixed double-head fluid guiding sleeve from axially sliding relative to the locking ring through the limit seat. At the same time, the fixed double-head fluid guiding sleeve can be prevented from deflecting relative to the locking ring through the connecting stud. When the coil winding is electrified, the movable iron core is driven to slide vertically inside the first sealing cover. Then, the movable iron core drives the movable double-head fluid guiding sleeve to move downward inside the fixed double-head fluid guiding sleeve through the first sealing transmission seat, the first transmission frame, and the upper fluid guiding cover, so that the hydraulic medium is sequentially input into the inner side of the bottom end of the bidirectional misaligned fluid guiding core through the kidney-shaped fluid guiding holes and the first fluid guiding grooves, and half of the bidirectional misaligned fluid guiding cores can output the hydraulic medium through the conveying holes on the upper fluid guiding cover, thereby meeting the one-way transportation of the hydraulic medium.

[0017] 2. The present invention can control the flow rate of the hydraulic medium by adjusting the penetration amount between the first fluid guiding groove and the kidney-shaped fluid guiding hole. Inject gas into the pressure boosting chamber and the movable iron core moves upward. Then, the pressure in the pressure boosting chamber increases and drives the movable double-head fluid guiding sleeve to move upward through the second sealing transmission seat, the second transmission frame, and the lower fluid guiding cover in sequence, so that the hydraulic medium is sequentially input into the inner side of the upper end of the bidirectional misaligned fluid guiding core through the kidney-shaped fluid guiding holes and the first fluid guiding grooves, and the other half of the bidirectional misaligned fluid guiding cores can output the hydraulic medium through the conveying holes on the lower fluid guiding cover, realizing the reverse transportation of the hydraulic medium, and further realizing the two-way flow regulation and cut-off of the hydraulic system by the double-acting balance valve.

[0018] 3. The present invention can reduce the pressure on the movable iron core when the hydraulic medium is reversely transported by injecting gas through the air nozzle, thereby prolonging the service life of the electromagnetic regulating mechanism and reducing the risk of leakage of the hydraulic medium between the second sealing transmission seat and the valve body. A humidity sensor is arranged inside the seal detection head, so that the leakage of the hydraulic medium can be monitored through the humidity sensor and overflow through the overflow pipe, realizing the timely detection of the leakage of the hydraulic medium. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the whole of the present invention;

[0020] Figure 2Explosion structure schematic diagram of the whole of the present invention;

[0021] Figure 3 Partial sectional structure schematic diagram of the electromagnetic adjustment mechanism of the present invention;

[0022] Figure 4 Sectional structure schematic diagram of the first transmission frame of the present invention;

[0023] Figure 5 Sectional structure schematic diagram of the pressure boosting adjustment mechanism of the present invention;

[0024] Figure 6 Structure schematic diagram of the valve core diversion mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 1 Sectional structure schematic diagram of area A therein;

[0026] Figure 8 Explosion structure schematic diagram of the valve core diversion mechanism of the present invention;

[0027] Figure 9 Explosion structure schematic diagram of the two-way misaligned diversion core of the present invention.

[0028] In the figure: 1, valve body; 2, electromagnetic adjustment mechanism; 201, connecting sleeve; 202, mounting sleeve; 203, overflow pipe; 204, first transmission frame; 205, first sealed transmission seat; 206, first sealing cover; 207, coil winding; 208, moving iron core; 209, first support spring; 210, fixed iron core; 211, second sealing cover; 212, sealing detection head; 3, pressure boosting adjustment mechanism; 301, valve cover; 302, sealing pressure ring; 303, air nozzle; 304, second support spring; 305, second sealed transmission seat; 306, second transmission frame; 4, valve core diversion mechanism; 401, fixed double-headed diversion sleeve; 402, locking ring; 403, connecting stud; 404, limit seat; 405, waist-shaped diversion hole; 406, lower diversion cover; 407, upper diversion cover; 408, two-way misaligned diversion core; 409, moving double-headed diversion sleeve; 410, sealing mounting ring; 411, sealing ring; 412, first flow guiding groove; 413, second flow guiding groove; 414, conveying hole. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Please refer to Figure 1 and Figure 2, an embodiment provided by the present invention: a double-acting balance valve for a hydraulic system of a walking construction machinery, comprising an electromagnetic adjustment mechanism 2, a pressure boosting adjustment mechanism 3 and a valve core diversion mechanism 4. A valve core diversion mechanism 4 is installed between the electromagnetic adjustment mechanism 2 and the pressure boosting adjustment mechanism 3. A valve body 1 is installed outside the valve core diversion mechanism 4. Both ends of the valve body 1 are connected to the hydraulic system of the construction machinery. Moreover, the pressure boosting adjustment mechanism 3, the valve core diversion mechanism 4 and the electromagnetic adjustment mechanism 2 are sequentially installed inside the valve body 1 from bottom to top to form a double-acting balance valve, realizing the flow control of the hydraulic system.

[0031] Please refer to Figures 6 to 9 , the valve core diversion mechanism 4 includes two locking rings 402. A plurality of connecting studs 403 are installed between the two locking rings 402. A fixed double-headed diversion sleeve 401 is installed inside the two locking rings 402. Limiting seats 404 are installed on the outer sides of the upper and lower ends of the fixed double-headed diversion sleeve 401. The two locking rings 402 are symmetrically installed relative to the middle of the valve body 1. The plurality of connecting studs 403 penetrate through the middle of the valve body 1 and are threadedly connected to the two locking rings 402. The fixed double-headed diversion sleeve 401 is connected to the two locking rings 402 by flat keys. Both ends of the fixed double-headed diversion sleeve 401 are threadedly connected to the two limiting seats 404. The locking rings 402 are in fitting contact with the limiting seats 404. The limiting seats 404 can prevent the fixed double-headed diversion sleeve 401 from axially sliding relative to the locking rings 402. At the same time, the connecting studs 403 can prevent the fixed double-headed diversion sleeve 401 from deflecting relative to the locking rings 402;

[0032] A plurality of waist-shaped diversion holes 405 are provided on the outer surfaces of the upper and lower ends of the fixed double-headed diversion sleeve 401. A movable double-headed diversion sleeve 409 is slidably connected to the inside of the fixed double-headed diversion sleeve 401. A sealing installation ring 410 is installed in the middle of the movable double-headed diversion sleeve 409. The sealing installation ring 410 is composed of two semi-circular rings. A sealing ring 411 is provided on the inner side of the sealing installation ring 410. The movable double-headed diversion sleeve 409 is connected to the sealing ring 411 through the sealing installation ring 410. The sealing installation ring 410 is slidably connected to the fixed double-headed diversion sleeve 401 through the sealing ring 411. A plurality of first flow guide grooves 412 are provided on the outer surfaces of the upper and lower ends of the movable double-headed diversion sleeve 409. The plurality of waist-shaped diversion holes 405 and the first flow guide grooves 412 are arranged in a circumferential pattern relative to the axis of the movable double-headed diversion sleeve 409. An upper diversion cover 407 is installed on the inner side of the upper end of the movable double-headed diversion sleeve 409. A lower diversion cover 406 is installed on the inner side of the bottom end of the movable double-headed diversion sleeve 409. A plurality of delivery holes 414 are provided on the surfaces of the lower diversion cover 406 and the upper diversion cover 407. By adjusting the penetration amount between the first flow guide grooves 412 and the waist-shaped diversion holes 405, the flow control of the hydraulic medium can be realized;

[0033] Inside the movable double - headed flow - guiding sleeve 409, a double - way misaligned flow - guiding core 408 is installed. Inside the double - way misaligned flow - guiding core 408, there are multiple second flow - guiding grooves 413. The multiple second flow - guiding grooves 413 are equally divided into two groups. The first flow - guiding groove 412 at the bottom end of the movable double - headed flow - guiding sleeve 409 is connected through the conveying hole 414 on the lower flow - guiding cover 406 to one group of the second flow - guiding grooves 413. The first flow - guiding groove 412 on the movable double - headed flow - guiding sleeve 409 is connected through the conveying hole 414 on the upper flow - guiding cover 407 to the other group of the second flow - guiding grooves 413. The multiple conveying holes 414 and the second flow - guiding grooves 413 are all arranged in a circular pattern relative to the axis of the double - way misaligned flow - guiding core 408. The installation directions of every two adjacent second flow - guiding grooves 413 are opposite. The multiple second flow - guiding grooves 413 and the conveying holes 414 are installed in one - to - one correspondence. By switching the flow - guiding of the conveying holes 414 on the upper flow - guiding cover 407 and the lower flow - guiding cover 406, the conveying direction of the hydraulic medium can be adjusted accordingly.

[0034] Please refer to Figures 2 to 4 , the electromagnetic adjustment mechanism 2 includes a connecting sleeve 201. The connecting sleeve 201 is fixedly connected to the upper end of the valve body 1. On the outer side of the middle part of the connecting sleeve 201, an overflow pipe 203 and a seal detection head 212 are installed. Both the overflow pipe 203 and the seal detection head 212 are fixedly connected to the middle part of the connecting sleeve 201. The axes of the overflow pipe 203 and the seal detection head 212 are perpendicular to each other. The overflow pipe 203 is connected to the inside of the connecting sleeve 201. Inside the seal detection head 212, there is a humidity sensor. Through the humidity sensor, the leakage of the hydraulic medium can be monitored and overflow can be carried out through the overflow pipe 203, realizing the timely discovery of the leakage of the hydraulic medium;

[0035] At the upper end of the connecting sleeve 201, an installation sleeve 202 is fixedly installed. Inside the bottom end of the installation sleeve 202, a first sealing cover 206 is installed. On the upper end face of the first sealing cover 206, a coil winding 207 is installed. On the upper end of the coil winding 207, a second sealing cover 211 is installed. The upper and lower ends of the installation sleeve 202 are thread - connected to the second sealing cover 211 and the first sealing cover 206 respectively. The installation sleeve 202 and the coil winding 207 are fixedly connected through the first sealing cover 206 and the second sealing cover 211. Inside the coil winding 207, a movable iron core 208 is slidably connected. Through the first sealing cover 206 and the second sealing cover 211, the stroke of the movable iron core 208 can be limited;

[0036] A first support spring 209 is provided at the upper end of the moving iron core 208. A fixed iron core 210 is installed at the upper end of the first support spring 209. The fixed iron core 210 is fixedly connected to the middle of the second sealing cover 211. The fixed iron core 210 is connected to the upper end of the moving iron core 208 through the first support spring 209. A first sealed transmission seat 205 is installed at the bottom end of the moving iron core 208. A first transmission frame 204 is installed on the outer side of the bottom end of the first sealed transmission seat 205. The bottom end of the moving iron core 208 penetrates through the first sealing cover 206 and is fixedly connected to the first transmission frame 204 through the first sealed transmission seat 205. When the coil winding 207 is powered on, it drives the moving iron core 208 to slide vertically inside the first sealing cover 206. Furthermore, the moving iron core 208 drives the moving double-head flow guiding sleeve 409 to move downward inside the fixed double-head flow guiding sleeve 401 through the first sealed transmission seat 205, the first transmission frame 204, and the upper flow guiding cover 407.

[0037] Please refer to Figure 4 、 Figure 5 and Figure 7 For

[0038] Please refer to Figure 2 and Figure 5, the first sealed drive seat 205 and the second sealed drive seat 305 are both slidably connected to the valve body 1. The first sealed drive seat 205 is located directly above the second sealed drive seat 305. Sealing rings are provided between the first sealed drive seat 205 and the second sealed drive seat 305 and the upper and lower ends of the valve body 1 respectively. The opposite end faces of the lower flow guiding cover 406 and the upper flow guiding cover 407 are both provided with clamping grooves. The bottom end of the first drive frame 204 penetrates through one of the limit seats 404 and is inserted into the inner side of the clamping groove. The upper end of the second drive frame 306 penetrates through the other limit seat 404 and is inserted into the inner side of the clamping groove. The first drive frame 204 is snap-fitted and installed with the upper flow guiding cover 407, and the second drive frame 306 is snap-fitted and installed with the lower flow guiding cover 406. Both the first drive frame 204 and the second drive frame 306 are slidably connected to the two limit seats 404. The vertical positions of the lower flow guiding cover 406, the upper flow guiding cover 407, and the double-direction misaligned flow guiding core 408 can be adjusted through the first drive frame 204 and the second drive frame 306.

[0039] In summary, the pressure boosting and regulating mechanism 3, the valve core flow guiding mechanism 4, and the electromagnetic regulating mechanism 2 are sequentially installed inside the valve body 1 from bottom to top to form a double-acting balance valve. The two ends of the valve body 1 are connected to the hydraulic system of the construction machinery, and the power is turned on. The middle part of the valve body 1 is fixedly connected to the two locking rings 402 through a plurality of connecting studs 403. At the same time, the two ends of the fixed double-headed flow guiding sleeve 401 are threadedly connected to the two limit seats 404. The limit seats 404 can prevent the fixed double-headed flow guiding sleeve 401 from axially sliding relative to the locking ring 402. At the same time, the connecting studs 403 can prevent the fixed double-headed flow guiding sleeve 401 from deflecting relative to the locking ring 402;

[0040] The opposite end faces of the lower flow guiding cover 406 and the upper flow guiding cover 407 are both provided with clamping grooves, so that one end of each of the first drive frame 204 and the second drive frame 306 penetrates through the limit seat 404 and is respectively snap-fitted and installed with the lower flow guiding cover 406 and the upper flow guiding cover 407. When controlling the flow rate of the hydraulic medium, the hydraulic medium is input from one end of the valve body 1. A plurality of waist-shaped flow guiding holes 405 are provided on the outer surfaces of the upper and lower ends of the fixed double-headed flow guiding sleeve 401. The coil winding 207 is powered on, so that the coil winding 207 drives the moving iron core 208 to vertically slide inside the first sealing cover 206. Then, the moving iron core 208 drives the moving double-headed flow guiding sleeve 409 to move downward inside the fixed double-headed flow guiding sleeve 401 through the first sealed drive seat 205, the first drive frame 204, and the upper flow guiding cover 407, realizing that the hydraulic medium sequentially passes through the waist-shaped flow guiding holes 405 and the first flow guiding groove 412 and is input into the inner side of the bottom end of the double-direction misaligned flow guiding core 408. The installation directions of every two adjacent double-direction misaligned flow guiding cores 408 are opposite;

[0041] At this time, half of the multiple double-direction misaligned flow guiding cores 408 can output the hydraulic medium through the delivery holes 414 on the upper flow guiding cover 407, thereby meeting the one-way delivery of the hydraulic medium. The sealing mounting ring 410 and the fixed double-headed flow guiding sleeve 401 are connected through a sealing ring 411. By adjusting the penetration amount between the first flow guiding groove 412 and the kidney-shaped flow guiding holes 405, the flow control of the hydraulic medium can be achieved.

[0042] At the same time, the air nozzle 303 injects gas into the pressurizing chamber between the valve cover 301 and the second sealing transmission seat 305, and the moving iron core 208 moves upward. Then, the pressure in the pressurizing chamber increases and drives the moving double-headed flow guiding sleeve 409 to move upward through the second sealing transmission seat 305, the second transmission frame 306, and the lower flow guiding cover 406 in sequence, so that the hydraulic medium is input into the inner side of the upper end of the double-direction misaligned flow guiding core 408 through the kidney-shaped flow guiding holes 405 and the first flow guiding groove 412 in sequence. At this time, the other half of the multiple double-direction misaligned flow guiding cores 408 can output the hydraulic medium through the delivery holes 414 on the lower flow guiding cover 406, realizing the reverse delivery of the hydraulic medium, and further realizing the two-way flow regulation and cut-off of the hydraulic system by the double-acting balance valve.

[0043] Injecting gas through the air nozzle 303 can reduce the pressure on the moving iron core 208 during the reverse delivery of the hydraulic medium, thereby increasing the service life of the electromagnetic regulating mechanism 2 and reducing the risk of leakage of the hydraulic medium between the second sealing transmission seat 305 and the valve body 1. An overflow pipe 203 and a sealing detection head 212 are installed in the middle of the connecting sleeve 201, and a humidity sensor is provided inside the sealing detection head 212, so that the leakage of the hydraulic medium can be monitored by the humidity sensor and overflow through the overflow pipe 203, realizing the timely discovery of the leakage of the hydraulic medium.

[0044] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A double-acting balancing valve for a hydraulic system of a mobile engineering machinery, comprising an electromagnetic regulating mechanism (2), a boost regulating mechanism (3) and a valve core flow guiding mechanism (4), characterized in that: A valve core flow guide mechanism (4) is installed between the electromagnetic regulating mechanism (2) and the boost regulating mechanism (3); a valve body (1) is installed on the outer side of the valve core flow guide mechanism (4); the valve core flow guide mechanism (4) comprises two locking rings (402); a plurality of connecting studs (403) are installed between the two locking rings (402); a fixed double-head flow guide sleeve (401) is installed on the inner side of the two locking rings (402); limit seats (404) are installed on the outer sides of the upper and lower ends of the fixed double-head flow guide sleeve (401); a plurality of waist-shaped flow guide holes (405) are provided on the outer surfaces of the upper and lower ends of the fixed double-head flow guide sleeve (401); a moving double-head flow guide sleeve (409) is slidably connected to the inner side of the fixed double-head flow guide sleeve (401); and the moving double-head flow guide sleeve (409) is provided on the inner side of the fixed double-head flow guide sleeve (401). A sealing mounting ring (410) is installed in the middle of the flow sleeve (409), and a sealing ring (411) is provided on the inner side of the sealing mounting ring (410). The outer surfaces of the upper and lower ends of the dynamic double-headed flow guide sleeve (409) are provided with a plurality of first flow guide grooves (412). An upper flow guide cover (407) is installed on the inner side of the upper end of the dynamic double-headed flow guide sleeve (409), and a lower flow guide cover (406) is installed on the inner side of the bottom end of the dynamic double-headed flow guide sleeve (409). The surfaces of the lower flow guide cover (406) and the upper flow guide cover (407) are provided with a plurality of conveying holes (414). A bidirectional staggered flow guide core (408) is installed on the inner side of the dynamic double-headed flow guide sleeve (409), and a plurality of second flow guide grooves (413) are provided on the inner side of the bidirectional staggered flow guide core (408).

2. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 1 is characterized in that: The electromagnetic regulating mechanism (2) comprises a connecting sleeve (201), the connecting sleeve (201) being fixedly connected to the upper end of the valve body (1), an overflow pipe (203) and a sealing detection head (212) being installed on the outer side of the middle part of the connecting sleeve (201), a mounting sleeve (202) being fixedly installed on the upper end of the connecting sleeve (201), a first sealing cover (206) being installed on the inner side of the bottom end of the mounting sleeve (202), a coil winding (207) being installed on the upper end surface of the first sealing cover (206), and A second sealing cover (211) is installed at the upper end of the coil winding (207), a moving iron core (208) is slidably connected to the inner side of the coil winding (207), a first supporting spring (209) is provided at the upper end of the moving iron core (208), a fixed iron core (210) is installed at the upper end of the first supporting spring (209), a first sealing transmission seat (205) is installed at the bottom end of the moving iron core (208), and a first transmission frame (204) is installed on the outer side of the bottom end of the first sealing transmission seat (205).

3. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 2 is characterized in that: The boost regulating mechanism (3) comprises a valve cover (301), wherein the valve cover (301) is fixedly connected to the bottom end of the valve body (1), an air nozzle (303) is installed on the lower end surface of the valve cover (301), a sealing pressure ring (302) is installed on the inner side of the valve cover (301), a second supporting spring (304) is provided on the inner side of the sealing pressure ring (302), a second sealing transmission seat (305) is installed on the upper end of the second supporting spring (304), and a second transmission frame (306) is fixedly installed on the outer side of the upper end of the second sealing transmission seat (305).

4. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 3 is characterized in that: The overflow pipe (203) and the sealing detection head (212) are both fixedly connected to the middle part of the connecting sleeve (201); the axes of the overflow pipe (203) and the sealing detection head (212) are perpendicular to each other; the overflow pipe (203) is connected through the inside of the connecting sleeve (201); and a humidity sensor is provided on the inner side of the sealing detection head (212).

5. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 4 is characterized in that: The upper and lower ends of the installation sleeve (202) are both connected to the second sealing cover (211) and the first sealing cover (206) through threads; the installation sleeve (202) and the coil winding (207) are fixedly connected through the first sealing cover (206) and the second sealing cover (211); the fixed iron core (210) is fixedly connected to the middle of the second sealing cover (211); the fixed iron core (210) is connected to the upper end of the moving iron core (208) through a first supporting spring (209); the bottom end of the moving iron core (208) passes through the first sealing cover (206) and is fixedly connected to the first transmission frame (204) through a first sealing transmission seat (205).

6. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 5 is characterized in that: The sealing pressure ring (302) is inserted between the valve cover (301) and the valve body (1), and sealing rings are provided between the sealing pressure ring (302), the valve cover (301) and the valve body (1). The second sealing transmission seat (305) is connected to the valve cover (301) via a second supporting spring (304), and the air nozzle (303) is connected to the valve cover (301) via threads. A pressurizing chamber is provided between the valve cover (301) and the second sealing transmission seat (305), and the air nozzle (303) is connected to the pressurizing chamber.

7. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 6 is characterized in that: The first sealing transmission seat (205) and the second sealing transmission seat (305) are both slidably connected to the valve body (1); the first sealing transmission seat (205) is located directly above the second sealing transmission seat (305); sealing rings are provided between the first sealing transmission seat (205) and the second sealing transmission seat (305) and the upper and lower ends of the valve body (1); the opposite end surfaces of the lower guide cover (406) and the upper guide cover (407) are both provided with card slots; the first transmission frame (20 4) penetrates one of the limit seats (404) and is plugged into the inner side of the slot, the upper end of the second transmission frame (306) penetrates another limit seat (404) and is plugged into the inner side of the slot, the first transmission frame (204) is snap-fitted with the upper guide cover (407), the second transmission frame (306) is snap-fitted with the lower guide cover (406), and the first transmission frame (204) and the second transmission frame (306) are both slidably connected with the two limit seats (404).

8. The double-acting balancing valve for the hydraulic system of a mobile engineering machinery according to claim 7, characterized in that: The two locking rings (402) are symmetrically installed relative to the middle part of the valve body (1), and the plurality of connecting studs (403) pass through the middle part of the valve body (1) and are connected to the two locking rings (402) by threads, the fixed double-headed guide sleeve (401) and the two locking rings (402) are connected by flat keys, and the two ends of the fixed double-headed guide sleeve (401) are connected to the two limit seats (404) by threads, and the locking ring (402) is in close contact with the limit seat (404).

9. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 8, characterized in that: The moving double-headed flow guide sleeve (409) is connected to the sealing ring (411) via a sealing mounting ring (410), and the sealing mounting ring (410) is composed of two semicircular rings. The sealing mounting ring (410) is slidably connected to the fixed double-headed flow guide sleeve (401) via the sealing ring (411), and the plurality of waist-shaped flow guide holes (405) and the first flow guide grooves (412) are arranged in a circle relative to the axis of the moving double-headed flow guide sleeve (409).

10. The double-acting balancing valve for the hydraulic system of mobile engineering machinery according to claim 9, characterized in that: The plurality of second flow guide grooves (413) are equally divided into two groups. The first flow guide groove (412) located at the bottom end of the movable double-headed flow guide sleeve (409) is connected to one group of the second flow guide grooves (413) through the delivery holes (414) on the lower flow guide cover (406). The first flow guide groove (412) located on the movable double-headed flow guide sleeve (409) is connected to the other group of the second flow guide grooves (413) through the delivery holes (414) on the upper flow guide cover (407). The plurality of delivery holes (414) and the second flow guide grooves (413) are arranged in a circle relative to the axis of the bidirectional staggered flow guide core (408). The installation directions of each adjacent two second flow guide grooves (413) are opposite. The plurality of second flow guide grooves (413) and the delivery holes (414) are installed in a one-to-one correspondence.

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