Electro-hydraulic single-control reversing valve

Abstract

The utility model relates to the technical field of dumper equipment, in particular to an electro-hydraulic single-control reversing valve which comprises a valve body and a valve element, the valve element is arranged in the valve body, a high-pressure cavity, a lifting cavity, an oil return cavity and a pressure relief cavity are formed in the two sides of the valve element in a boss type, and the valve element is arranged in the valve body. A spring washer, a reset spring and a right end cover are arranged at the right end of the valve element, a pressure measuring plug is arranged in the middle of the right end cover, the right end cover is fixedly connected with the valve body through a bolt, a sealing rubber ring is arranged between the right end cover and the valve body, and a right spring cavity is formed in the position of the reset spring. The one-way valve and the pre-pressing valve are arranged in the valve body, working pressure is provided for the electro-hydraulic reversing valve, the action of the valve body lies in integration of multiple hydraulic elements of the large-flow electro-hydraulic reversing valve, the risk of oil leakage is reduced, the structure is more compact, the size is small, the weight is light, machining is convenient, the reversing response speed is high, response is sensitive, and the reliability of the reversing valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a self-unloading truck equipment technical field, concretely is electrohydraulic single control reversing valve. BACKGROUND

[0002] Recently, the chassis manufacturer of self-unloading truck launches the pure electric self-unloading truck, and part of the models does not configure the air compressor, the motor direct connection drive is used to the hydraulic pump, when the container unloads, needs to use the high flow electric control hydraulic reversing valve drive, can complete the lifting, stop, drop of big box. The high flow electric control hydraulic system has no precedent for the installation of large self-unloading truck, generally uses the pneumatic control reversing valve to realize the action, increases the risk of oil leakage, and the volume is big, the quality is heavy, the processing is inconvenient, the reversing corresponding speed is slow, the reaction is slow, reduces the reliability of the reversing valve, therefore, aiming at the above -mentioned problem proposes electrohydraulic single control reversing valve. SUMMARY

[0003] The utility model discloses a electrohydraulic single control reversing valve to solve the problem in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] As an optional scheme of the electrohydraulic single control reversing valve, the electrohydraulic single control reversing valve comprises a valve body and a valve core, the valve core is arranged in the interior of the valve body, the valve core of boss style is provided with a high-pressure cavity, a lifting cavity, an oil return cavity and a pressure relief cavity on both sides, a spring washer, a reset spring and a right end cover are arranged at the right end of the valve core, a pressure measuring plug is arranged at the middle position of the right end cover, the right end cover is fixedly connected with the valve body by using a bolt, a first sealing rubber ring is arranged between the right end cover and the valve body, and a right spring cavity is arranged at the position of the reset spring.

[0006] A spring washer, a reset spring and a left end cover are arranged at the left end of the valve core, a speed regulating rod is arranged at the middle position of the left end cover, the speed regulating rod and a left spring cavity are sealed by using a second sealing rubber ring, the speed regulating rod is connected and locked with the left end cover by using a first lock nut, and a sealing gasket is arranged between the first lock nut and the left end cover and fixedly connected by using a bolt.

[0007] A pilot valve is arranged on the top of the valve body, a first pilot cavity and a second pilot cavity are arranged at the outlet of the pilot valve, and a through cavity is further arranged in the valve body.

[0008] An oil inlet cavity is arranged on the front side of the valve body, and a safety valve and a pilot valve are further arranged in the interior of the valve body.

[0009] The upper end of the oil inlet cavity is provided with a pressure core, the upper end of the pressure core is provided with a pressure spring, the upper end of the pressure spring is provided with a spring seat, the radial position of the spring seat is provided with a third sealing rubber ring, the outer side of the spring seat is provided with a fixing seat, the fourth sealing rubber ring is arranged between the fixing seat and the valve body, the upper end of the spring seat is provided with a screw rod, and the outer side of the screw rod is provided with a second lock nut for locking and fixing.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The valve body built-in single valve and pre-pressing valve provide working pressure for the electro-hydraulic reversing valve, the integration of the multiple hydraulic elements of the large-flow electro-hydraulic reversing valve is realized, the risk of oil seepage is reduced, the structure is more compact, the volume is small, the quality is light, the processing is convenient, the reversing speed is fast, the reaction is sensitive, and the reliability of the reversing valve is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the whole structure schematic view of the utility model;

[0013] Figure 2 It is the sectional view of the valve body of the utility model;

[0014] Figure 3 It is the sectional view of the pilot valve of the utility model;

[0015] Figure 4 It is the installation structure schematic view of the safety valve of the utility model;

[0016] Figure 5 It is the side sectional view of the utility model.

[0017] In the drawing: 10-valve body, 20-valve core, 30-right end cover, 40-pressure measuring plug, 50-first sealing rubber ring, 60-return spring, 70-spring washer, 80-left end cover, 90-second sealing rubber ring, 100-speed regulating rod, 110-sealing gasket, 120-first lock nut, 130-pressure core, 140-pressure spring, 150-spring seat, 160-third sealing rubber ring, 170-fourth sealing rubber ring, 180-fixing seat, 190-screw rod, 200-second lock nut, 210-pilot valve, 220-safety valve, A-first pilot cavity, B-second pilot cavity, JS-lifting cavity, HY-oil return cavity, GY-high pressure cavity, XY-pressure relief cavity, YQ-right spring cavity, ZQ-left spring cavity, DT-conducting cavity, JY-oil inlet cavity. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Embodiment 1: please refer to Figures 1-5 The present application provides a technical scheme:

[0020] The electro-hydraulic single control reversing valve comprises a valve body 10 and a valve core 20, the valve core 20 is arranged in the inside of the valve body 10, the valve core 20 in the form of a boss is provided with a high-pressure cavity GY, a lifting cavity JS, an oil return cavity HY and a pressure relief cavity XY on both sides, the right end of the valve core 20 is provided with a spring washer 70, a reset spring 60 and a right end cover 30, the middle position of the right end cover 30 is provided with a pressure measuring plug 40, the right end cover 30 is fixedly connected with the valve body 10 by using bolts, a first sealing rubber ring 50 is arranged between the right end cover 30 and the valve body 10, and the position of the reset spring 60 is provided with a right spring cavity YQ.

[0021] The left end of the valve core 20 is provided with a spring washer 70, a reset spring 60 and a left end cover 80, the middle position of the left end cover 80 is provided with a speed regulating rod 100, the speed regulating rod 100 and a left spring cavity ZQ are sealed by using a second sealing rubber ring 90, the speed regulating rod 100 is connected and locked with the left end cover 80 by using a first lock nut 120, the first lock nut 120 and the left end cover 80 are provided with a sealing gasket 110 in the middle, and the left end cover 80 is fixedly connected with the valve body 10 by using bolts;

[0022] The top of the valve body 10 is provided with a pilot valve 210, the outlet of the pilot valve 210 is provided with a first pilot cavity A and a second pilot cavity B, and a through cavity DT is further arranged in the valve body 10.

[0023] The front side of the valve body 10 is provided with an oil inlet cavity JY, and the inside of the valve body 10 is further provided with a safety valve 220 and a pilot valve 210.

[0024] The upper end of the oil inlet cavity JY is provided with a pressure core 130, the upper end of the pressure core 130 is provided with a pressure spring 140, the upper end of the pressure spring 140 is provided with a spring seat 150, the radial position of the spring seat 150 is provided with a third sealing rubber ring 160, the outer side of the spring seat 150 is provided with a fixing seat 180, the fourth sealing rubber ring 170 is arranged between the fixing seat 180 and the valve body 10, the upper end of the spring seat 150 is provided with a screw rod 190, and the outer side of the screw rod 190 is provided with a second lock nut 200 for locking and fixing.

[0025] Workflow: the first pilot chamber A oil, left spring chamber ZQ, into the pressure oil, push the valve core 20, cause the valve core 20 displacement, high pressure chamber GY pressure oil into the lifting chamber JS, realize the lifting action;

[0026] The second pilot chamber B oil, right spring chamber YQ, into the pressure oil, push the valve core 20, cause the valve core 20 displacement, high pressure chamber GY pressure oil into the return oil chamber HY, lifting chamber JS pressure oil, into the through cavity DT, through the through cavity DT, into the return oil chamber, realize the falling action;

[0027] The present electric control hydraulic reversing valve, can control single cylinder or multi oil cylinder dump truck lifting, with the carriage big frame fixed connection use, realize control carriage lifting function.

[0028] It should be noted that in this paper, such as the first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or equipment.

[0029] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An electro-hydraulic single control reversing valve characterized in that: it comprises a valve body (10) and a valve core (20), the valve core (20) is arranged inside the valve body (10), the valve core (20) is provided with a boss-shaped pattern on both sides to form a high-pressure cavity (GY), a lifting cavity (JS), an oil return cavity (HY) and a pressure relief cavity (XY), the right end of the valve core (20) is provided with a spring washer (70), a return spring (60) and a right end cover (30), the middle position of the right end cover (30) is provided with a pressure measuring plug (40), the right end cover (30) is fixedly connected with the valve body (10) by using bolts, the first sealing rubber ring (50) is arranged between the right end cover (30) and the valve body (10), and the position of the return spring (60) is provided with a right spring cavity (YQ); the left end of the valve core (20) is provided with a spring washer (70), a return spring (60) and a left end cover (80), the middle position of the left end cover (80) is provided with a speed regulating rod (100), the speed regulating rod (100) and the left spring cavity (ZQ) are sealed by using a second sealing rubber ring (90), the speed regulating rod (100) is connected and locked with the left end cover (80) by using a first lock nut (120), the first lock nut (120) and the left end cover (80) are provided with a sealing gasket (110) in the middle, and the left end cover (80) is fixedly connected with the valve body (10) by using bolts; the top of the valve body (10) is provided with a pilot valve (210), the outlet of the pilot valve (210) is provided with a first pilot cavity (A) and a second pilot cavity (B), and the valve body (10) is further provided with a through cavity (DT); the front side of the valve body (10) is provided with an oil inlet cavity (JY), and the inside of the valve body (10) is further provided with a safety valve (220) and a pilot valve (210); the upper end of the oil inlet cavity (JY) is provided with a pressure core (130), the upper end of the pressure core (130) is provided with a pressure spring (140), the upper end of the pressure spring (140) is provided with a spring seat (150), the radial side of the spring seat (150) is provided with a third sealing rubber ring (160), the outer side of the spring seat (150) is provided with a fixing seat (180), the fourth sealing rubber ring (170) is arranged between the fixing seat (180) and the valve body (10), the upper end of the spring seat (150) is provided with a screw rod (190), and the outer side of the screw rod (190) is provided with a second lock nut (200) for locking and fixing.

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