Bidirectional pushing hydraulic reversing valve

Abstract

The utility model provides a bidirectional pushing hydraulic reversing valve, which comprises a valve body, a valve core and two pushing mechanisms, the valve core is arranged in the valve body, the two sides of the valve body are provided with mounting holes, the two pushing mechanisms are connected to the two sides of the valve body and are connected with the valve core through the mounting holes, each pushing mechanism comprises a shell, a motor, a rotating sleeve, a screw rod, a guide sleeve and a guide block, the shell is connected to the valve body, the motor is installed in the shell, the rotating sleeve is installed in the shell and connected with the motor, a threaded hole is formed in the rotating sleeve, the lead screw is connected in the threaded hole, the guide sleeve is installed in the shell, and the guide block is connected to the lead screw and arranged in the guide sleeve so that the lead screw can be driven to move in the axial direction when the rotating sleeve rotates, and therefore the valve element can be pushed. Through the design of the two pushing mechanisms, the stress condition of parts is simple, a linkage rod does not need to serve as a medium, and the complex stress requirement is met. And the size of the pushing part can be made large, so that the pushing part can bear higher pressure and is suitable for hydraulic equipment with higher pressure.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic equipment, in particular to a bidirectionally driven hydraulic reversing valve. Background Art

[0002] A Chinese patent (Announcement No.: CN220566342U) discloses a reversing valve, which drives the lead screw and the connecting rod to move forward and backward through a single motor to drive the valve core. Due to the limitation of the valve body structure, the diameter of the connecting rod cannot be too large, and the rigidity force that the connecting rod can withstand is relatively small. Since the motor is a one-way push and pull, the connecting rod must withstand extrusion and tensile forces during operation, and the force conditions are relatively complex. In some reversing valves with high pressure, the connecting rod is easy to break. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a bidirectional hydraulic reversing valve, comprising a valve body, a valve core and two pushing mechanisms, the valve core is arranged in the valve body, mounting holes are opened on both sides of the valve body, the two pushing mechanisms are connected on both sides of the valve body and are connected to the valve core through the mounting holes, the pushing mechanism comprises a shell, a motor, a rotating sleeve, a screw rod, a guide sleeve and a guide block, the shell is connected to the valve body, the motor is installed in the shell, the rotating sleeve is installed in the shell and connected to the motor, a threaded hole is arranged in the rotating sleeve, the screw rod is connected in the threaded hole, the guide sleeve is installed in the shell, the guide block is connected to the screw rod and arranged in the guide sleeve, so as to drive the screw rod to move axially when the rotating sleeve rotates, thereby pushing the valve core.

[0004] Preferably, the pushing mechanism further includes a push rod, which is connected to one end of the screw rod and is installed in the housing and located between the guide block and the valve core.

[0005] Preferably, a spring is further included, and the spring is arranged between the valve core and the housing.

[0006] Preferably, a sealing structure is connected to the mounting hole, the sealing structure includes a sealing sleeve and a sealing ring, an internal thread is provided in the mounting hole, a first external thread is provided at one end of the sealing sleeve, a through hole is provided in the sealing sleeve and penetrates the sealing sleeve axially, a sealing groove is provided on the side wall of the through hole, and the sealing ring is installed in the sealing groove.

[0007] Preferably, a limiting groove is provided at one end of the sealing sleeve where the first external thread is provided, and a limiting plate for limiting the valve core is provided in the limiting groove.

[0008] Preferably, the sealing structure also includes a self-lubricating sleeve and a locking nut. The sealing groove passes through one end of the sealing sleeve facing away from the first external thread. The self-lubricating sleeve is arranged in the sealing groove. An annular mounting groove is arranged on the outer wall of the self-lubricating sleeve. The sealing ring is installed in the mounting groove. The other end of the sealing sleeve is provided with a second external thread adapted to the locking nut, and a retaining ring is provided on the locking nut.

[0009] Preferably, the spring is arranged in the limiting groove and is located between the limiting plate and the limiting groove.

[0010] The beneficial effects of the utility model are as follows: through the design of two pushing mechanisms, the valve core is pushed from both sides, and the two directions are only stressed when pushing. In this way, the stress of the components is relatively simple, and there is no need for a connecting rod as an intermediary to meet complex stress requirements. The valve core can be pushed directly by the screw rod or in conjunction with other components. Since there is no need to push and pull operations at the same part, there is no need to design a connection structure, and the size of the pushing component can be made larger, which can withstand greater pressure and is suitable for higher pressure hydraulic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the overall structure diagram of the utility model;

[0012] Figure 2 for Figure 1 A partial enlargement of the marked area. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0014] See also Figure 1-Figure 2 The utility model provides a bidirectional hydraulic reversing valve, including a valve body 1, a valve core 2 and two pushing mechanisms. The valve core 2 is arranged in the valve body 1. Both sides of the valve body 1 are provided with mounting holes. The two pushing mechanisms are connected to both sides of the valve body 1 and are connected to the valve core 2 through the mounting holes. The pushing mechanism includes a shell 31, a motor 32, a rotating sleeve 33, a screw rod 34, a guide sleeve 35 and a guide block 36. The shell 31 is connected to the valve body 1, the motor 32 is installed in the shell 31, the rotating sleeve 33 is installed in the shell 31 and connected to the motor 32, a threaded hole is provided in the rotating sleeve 33, the screw rod 34 is connected in the threaded hole, the guide sleeve 35 is installed in the shell 31, and the guide block 36 is connected to the screw rod 34 and is arranged in the guide sleeve 35, so as to drive the screw rod 34 to move axially when the rotating sleeve 33 rotates, thereby pushing the valve core 2.

[0015] By designing two pushing mechanisms, the valve core 2 is pushed from both sides, and the two directions are stressed only when pushing. In this way, the stress of the components is relatively simple, and there is no need for a linkage rod as an intermediary to meet complex stress requirements. The valve core 2 can be pushed directly by the screw rod 34 or in conjunction with other components. Since there is no need to push and pull operations at the same part, there is no need to design a connection structure, and the size of the pushing component can be made larger, which can withstand greater pressure and is suitable for higher pressure hydraulic equipment.

[0016] Furthermore, the pushing mechanism further includes a push rod 37, which is connected to one end of the screw rod 34, and is installed in the housing 31 and located between the guide block 36 and the valve core 2. Through the design of the push rod 37, the screw rod 34 only needs to meet the cooperation with the rotating sleeve 33, and the remaining required length is supplemented by the push rod 37. Compared with the overall integrated design, after adding the push rod 37, the overall structure is easier to process and less material is wasted.

[0017] Furthermore, a spring 38 is included, and the spring 38 is arranged between the valve core 2 and the housing 31. The spring 38 can absorb the hydraulic vibration of the valve core 2 during operation, reduce the overall vibration during operation, reduce noise, and extend the life of the components.

[0018] Furthermore, a sealing structure is connected to the mounting hole, and the sealing structure includes a sealing sleeve 41 and a sealing ring 43. An internal thread is provided in the mounting hole, a first external thread is provided at one end of the sealing sleeve 41, a through hole is provided in the sealing sleeve 41 and penetrates the sealing sleeve 41 axially, a sealing groove 44 is provided on the side wall of the through hole, and the sealing ring 43 is installed in the sealing groove 44.

[0019] Through the above design, during installation, the sealing sleeve 41 and the sealing ring 43 are first installed on the valve body 1, so that the installation of the sealing structure is more accurate and tight, and leakage is avoided.

[0020] Furthermore, a limiting groove 45 is provided at one end of the sealing sleeve 41 provided with the first external thread, and a limiting plate 46 for limiting the valve core 2 is provided in the limiting groove 45 to prevent the valve core 2 from coming out of the valve body 1 .

[0021] Furthermore, the sealing structure also includes a self-lubricating sleeve 47 and a locking nut 42. The sealing groove 44 penetrates the end of the sealing sleeve 41 facing away from the first external thread. The self-lubricating sleeve 47 is arranged in the sealing groove 44. The outer wall of the self-lubricating sleeve 47 is provided with an annular installation groove 49. The sealing ring 43 is installed in the installation groove 49. The other end of the sealing sleeve 41 is provided with a second external thread adapted to the locking nut 42. The locking nut 42 is provided with a retaining ring 48. During installation, the retaining ring 48 limits the self-lubricating sleeve 47. By providing the self-lubricating sleeve 47, the sealing function is ensured while reducing friction, heat and noise during the working process, and extending the working life of the component.

[0022] Furthermore, the spring 38 is disposed in the limiting groove 45 and is located between the limiting plate 46 and the limiting groove 45 .

[0023] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A bidirectional hydraulic reversing valve, characterized in that: The invention comprises a valve body (1), a valve core (2) and two driving mechanisms, wherein the valve core (2) is arranged in the valve body (1), mounting holes are provided on both sides of the valve body (1), the two driving mechanisms are connected to both sides of the valve body (1) and are connected to the valve core (2) through the mounting holes, the driving mechanisms comprising a housing (31), a motor (32), a rotating sleeve (33), a screw rod (34), a guide sleeve (35) and a guide block (36), the housing (31) is connected to the valve body (1), the motor (32) is connected to the rotating sleeve (33), the screw rod (34), a guide sleeve (35) and a guide block (36), the housing (31) is connected to the valve body (1), the motor (32) is connected to the rotating sleeve (33), the screw rod (34) is connected to the rotating sleeve (35) and the guide block (36) The motor (32) is mounted in a housing (31), the rotating sleeve (33) is mounted in the housing (31) and connected to the motor (32), a threaded hole is provided in the rotating sleeve (33), the screw rod (34) is connected in the threaded hole, the guide sleeve (35) is mounted in the housing (31), and the guide block (36) is connected to the screw rod (34) and is arranged in the guide sleeve (35), so as to drive the screw rod (34) to move axially when the rotating sleeve (33) rotates, thereby pushing the valve core (2).

2. A bidirectional hydraulic reversing valve according to claim 1, characterized in that: The pushing mechanism further comprises a push rod (37), wherein the push rod (37) is connected to one end of the screw rod (34), and the push rod (37) is installed in the housing (31) and is located between the guide block (36) and the valve core (2).

3. A bidirectional hydraulic reversing valve according to claim 1, characterized in that: It also includes a spring (38), wherein the spring (38) is arranged between the valve core (2) and the housing (31).

4. A bidirectional hydraulic reversing valve according to claim 3, characterized in that: A sealing structure is connected to the mounting hole, the sealing structure comprising a sealing sleeve (41) and a sealing ring (43); an internal thread is provided in the mounting hole; one end of the sealing sleeve (41) is provided with a first external thread; a through hole is provided in the sealing sleeve (41) and penetrates the sealing sleeve (41) in the axial direction; a sealing groove (44) is provided on a side wall of the through hole; and the sealing ring (43) is mounted in the sealing groove (44).

5. A bidirectional hydraulic reversing valve according to claim 4, characterized in that: One end of the sealing sleeve (41) provided with the first external thread is provided with a limiting groove (45), and a limiting plate (46) for limiting the valve core (2) is provided in the limiting groove (45).

6. A bidirectional hydraulic reversing valve according to claim 5, characterized in that: The sealing structure further comprises a self-lubricating sleeve (47) and a locking nut (42); the sealing groove (44) penetrates one end of the sealing sleeve (41) facing away from the first external thread; the self-lubricating sleeve (47) is arranged in the sealing groove (44); an annular mounting groove (49) is arranged on the outer wall of the self-lubricating sleeve (47); the sealing ring (43) is installed in the mounting groove (49); the other end of the sealing sleeve (41) is provided with a second external thread adapted to the locking nut (42); and a retaining ring (48) is arranged on the locking nut (42).

7. A bidirectional hydraulic reversing valve according to claim 5, characterized in that: The spring (38) is arranged in the limiting groove (45) and is located between the limiting plate (46) and the limiting groove (45).

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