Leakage-proof hydraulic control reversing valve

Abstract

The utility model discloses a leakproof pilot operated directional control valve relates to pilot operated directional control valve technical field, including valve body, the both sides of valve body are connected with butt joint subassembly, the butt joint subassembly includes the outer cylinder that is assembled and located valve body one side, the end of outer cylinder is sleeved with locking ring, the curved surface inner wall of locking ring is fixed with two sets of fixture block, and the fixture block is fixed with the outer cylinder. Two sets of reset springs fixed to the valve body are arranged in the outer cylinder. The clamping blocks are arranged in the inner wall of the locking ring so that the locking ring can be in butt joint with the butt joint cylinder, the reversing valve can be effectively and conveniently disassembled and assembled, and the situation that the reversing valve is prone to aging and liquid leakage after being fixed through bolts and used for a long time is avoided; and meanwhile, the butt joint pipe is matched with a ring groove formed in the butt joint cylinder to improve the sealing effect of the valve body, the inner cylinder is movably connected with the outer cylinder to effectively cope with external tension, and the situation that a pipeline connected with the end is torn and torn due to the fact that the inner cylinder is pulled is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulically controlled reversing valves, in particular to a leakage-proof hydraulically controlled reversing valve. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, producing linear reciprocating (or oscillating) motion. It features a simple structure and reliable operation. Using it to achieve reciprocating motion eliminates the need for a reduction gear, eliminates transmission backlash, and provides smooth motion. Therefore, it is widely used in the hydraulic systems of various machines. When a hydraulic cylinder is used, a hydraulically controlled reversing valve is employed. Its primary function is to change the direction of the hydraulic oil flow, thereby enabling the extension or retraction of the hydraulic cylinder's travel rod.

[0003] An existing patent (authorization announcement number: CN219159654U) discloses a leakage-proof hydraulically controlled reversing valve, which solves the problem of poor sealing at the connection of the original hydraulically controlled reversing valve. The utility model has a reasonable structure and good sealing, which avoids leakage at the connection of the hydraulically controlled reversing valve.

[0004] However, the above technical solution still has certain defects. The end of the valve body is connected to the external pipeline by a flange. On the one hand, the screws in the flange are prone to rust, which makes it difficult to disassemble and assemble the valve body later. On the other hand, when the pipeline connected by the flange is subjected to external pulling force, the pipeline connected at the end will be torn apart or even separated, causing liquid leakage inside the valve body. For this reason, a leakage-proof hydraulically controlled reversing valve is proposed. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide a leakage-proof hydraulically controlled reversing valve to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a leak-proof hydraulically controlled reversing valve, comprising a valve body, with docking assemblies connected to both sides of the valve body, the docking assembly comprising an outer cylinder assembled on one side of the valve body, a locking ring sleeved on the end of the outer cylinder, two groups of clamping blocks fixed to the curved inner wall of the locking ring, two groups of return springs fixed to the valve body provided in the outer cylinder, a butt ring slidably arranged with the inner wall of the outer cylinder fixed to the other end of the return spring, a butt ring sleeved inside the butt ring and connected to the valve body, the end of the butt pipe being assembled with an outer tube assembly;

[0007] The outer tube assembly includes a docking tube that is sleeved on the outer wall of the docking tube. The outer tube is fixed to the end of the docking tube away from the docking tube. Two groups of slots are opened on the curved outer wall of the docking tube. The slots extend to the inside of the locking ring and are movably connected to the clamping block.

[0008] As an optimal technical solution for the leak-proof hydraulically controlled reversing valve of the present invention, the outer wall of the docking tube is sleeved with multiple groups of rubber rings, and the inner wall of the docking tube is provided with annular grooves that match the rubber rings.

[0009] As an optimal technical solution for a leak-proof hydraulically controlled reversing valve of the utility model, an adjustment ring extending to the interior of the outer tube is fixed at the end of the locking ring, an adjustment groove is opened inside the annular inner wall at the end of the outer tube, and a torsion spring connected to the adjustment groove is sleeved on the outer wall of the adjustment ring.

[0010] As an optimal technical solution for a leakage-proof hydraulically controlled reversing valve of the present invention, an inner ring groove is provided on the inner wall of one end of the outer tube close to the valve body, an inner ring groove is sleeved with an inner tube fixed to the valve body, and a blind hole is provided on the end of the inner tube close to the locking ring.

[0011] As an optimal technical solution for a leakage-proof hydraulically controlled reversing valve of the utility model, a guide rod extending into the blind hole is fixed inside the inner ring groove, and a spring is sleeved on the outer wall of the guide rod. The two ends of the spring are respectively fixed to the inner wall of the inner ring groove and the inner side wall of the blind hole.

[0012] As an optimal technical solution for the leak-proof hydraulically controlled reversing valve of the present invention, two groups of constraint strips are transversely fixed to the outer wall of the butt joint pipe, and constraint transverse grooves matching the constraint strips are opened on the inner wall of the butt joint pipe.

[0013] In summary, the present invention has the following beneficial effects:

[0014] The utility model discloses that the reversing valve is effectively and conveniently disassembled and assembled by arranging a card block inside the inner wall of the locking ring so that it can be docked with the docking tube, and the situation that it is easy to leak due to aging after being fixed by bolts for a long time is avoided. At the same time, the ring grooves opened in the docking tube and the inside of the docking tube cooperate with each other to improve the sealing effect of the valve body. The inner tube is provided so that it can be movably connected with the outer tube to effectively cope with the pulling force generated by the outside world, and the pipes connected at the ends are prevented from being torn apart due to pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the docking assembly and outer tube assembly of the present utility model;

[0017] Figure 3 This is a front plan view of the docking assembly of the present invention;

[0018] Figure 4 This is a front cutaway view of the outer tube assembly of the present invention;

[0019] Figure 5This is a front cutaway view of the docking assembly of the present invention;

[0020] Figure 6 This is a cross-sectional structural diagram of some docking components of the present invention;

[0021] Figure 7 For the utility model Figure 6 Enlarged view of point A in the middle.

[0022] In the figure: 100, valve body;

[0023] 110. Docking assembly; 111. Outer tube; 112. Docking tube; 113. Rubber ring; 114. Locking ring; 115. Block; 116. Return spring; 117. Snap ring; 118. Inner ring groove; 120. Outer tube assembly; 121. Docking tube; 122. Outer tube; 123. Blocking groove; 124. Ring groove; 130. Inner tube; 131. Guide rod; 132. Blind hole; 133. Spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] The following describes an embodiment of the present invention based on its overall structure.

[0026] A leak-proof hydraulically controlled reversing valve, such as Figure 1-7 As shown, it includes a valve body 100, with docking assemblies 110 connected to both sides of the valve body 100. The docking assembly 110 includes an outer cylinder 111 assembled on one side of the valve body 100, a locking ring 114 is sleeved on the end of the outer cylinder 111, and two groups of clamping blocks 115 are fixed to the curved inner wall of the locking ring 114. Two groups of return springs 116 fixed to the valve body 100 are provided in the outer cylinder 111, and the other end of the return spring 116 is fixed to a retaining ring 117 slidably arranged on the inner wall of the outer cylinder 111. The retaining ring 117 is sleeved inside the retaining ring 117 and is connected to the valve body 100. The end of the docking tube 112 is assembled with an outer tube assembly 120;

[0027] The outer tube assembly 120 includes a docking tube 121 that is sleeved on the outer wall of the docking tube 112. The outer tube 122 is fixed to the end of the docking tube 121 away from the docking tube 112. Two sets of slots 123 are opened on the curved outer wall of the docking tube 121. The slots 123 extend to the interior of the locking ring 114 and are movably connected to the block 115.

[0028] A plurality of rubber rings 113 are sleeved on the outer wall of the butt joint tube 112 , and an annular groove 124 that matches the rubber rings 113 is formed on the inner wall of the butt joint sleeve 121 .

[0029] An inner ring groove 118 is formed on the inner wall of the outer cylinder 111 at one end close to the valve body 100 . An inner cylinder 130 fixed to the valve body 100 is sleeved inside the inner ring groove 118 . A blind hole 132 is formed on the end of the inner cylinder 130 close to the locking ring 114 .

[0030] A guide rod 131 extending into the blind hole 132 is fixed inside the inner ring groove 118 , and a spring 133 is sleeved on the outer wall of the guide rod 131 . The two ends of the spring 133 are respectively fixed to the inner wall of the inner ring groove 118 and the inner side wall of the blind hole 132 .

[0031] To pull the docking tube 121 to dock with the outer tube 111, you can first rotate the locking ring 114, which can be rotated along the end of the outer tube 111 by the torsion spring. The rotation of the locking ring 114 can drive the block 115 to move. At this time, the block 115 can be rotated to the direction of the card slot 123, and the docking tube 121 is pushed inward to make the block 115 slide inside the card slot 123. The docking tube 121 extends to the inside of the outer tube 111, so that the docking tube 121 can contact the push ring 117 and squeeze the reset spring 116 to deform and compress. At this time, the hand releases the locking ring 114 to reset it through the torsion spring, thereby driving the block 115 to rotate. When the block 115 rotates, it can be in the card slot 12 3 is slidably engaged with its end. Since the docking tube 112 is sleeved on the surface of the docking tube 112, when the docking tube 121 is docked into the inner part of the outer tube 111, the annular groove 124 provided on the inner wall of the docking tube 121 will be tightly docked with the docking tube 112. At the same time, the inner tube 130 is provided. When the docking tube 121 and the outer tube 122 are used, they are subjected to external tension, which can enable the outer tube 111 to slide slightly on the outer wall of the inner tube 130, thereby playing a certain role in buffering and unloading force. When the outer tube 111 is subjected to external tension, it can move the outer tube 111, thereby driving the guide rod 131 to move and then compressing the spring 133, so that the outer tube 111 can have a certain amount of activity space.

[0032] Please refer to Figure 5 The end of the locking ring 114 is fixed with an adjustment ring extending to the inside of the outer tube 111. An adjustment groove is opened inside the annular inner wall of the end of the outer tube 111, and the outer wall of the adjustment ring is sleeved with a torsion spring connected to the adjustment groove.

[0033] It is convenient to dock and assemble the locking ring 114 on the end of the outer cylinder 111 , and the locking ring 114 can be rotated along the outer cylinder 111 through the torsion spring.

[0034] Please refer to Figure 3 and Figure 4 Two sets of constraint bars are transversely fixed to the outer wall of the butt-joint tube 112, and constraint transverse grooves matching the constraint bars are opened on the inner wall of the butt-joint tube 112.

[0035] The provision of the restraining transverse groove can prevent the rubber ring 113 from rotating along the inner wall of the ring groove 124 , thereby further playing a role in positioning the docking sleeve 121 and the docking tube 112 .

[0036] When in use, pull the docking tube 121 to dock with the outer tube 111, and first rotate the locking ring 114, which can be rotated along the end of the outer tube 111 by the torsion spring. The rotation of the locking ring 114 can drive the block 115 to move. At this time, the block 115 can be rotated to the direction of the slot 123, and the docking tube 121 is pushed inward to make the block 115 slide inside the slot 123. The docking tube 121 extends to the inside of the outer tube 111, so that the docking tube 121 can contact the push ring 117 and squeeze the reset spring 116 to deform and compress. At this time, release the locking ring 114 by hand to reset it through the torsion spring, thereby driving the block 115 to rotate. When the block 115 rotates, it can slide and engage with its end inside the slot 123. The butt joint tube 112, when the butt joint tube 121 is docked into the outer tube 111, the annular groove 124 on the inner wall of the butt joint tube 121 will tightly dock with the butt joint tube 112, thereby improving the sealing of the outer tube assembly 120 and preventing it from aging and leaking due to long-term use by bolt fixation. At the same time, the inner tube 130 is provided. When the butt joint tube 121 and the outer tube 122 are used, they are subjected to external tension, which allows the outer tube 111 to slide slightly on the outer wall of the inner tube 130, thereby playing a certain role in buffering and unloading force. When the outer tube 111 is subjected to external tension, it can move the outer tube 111, thereby driving the guide rod 131 to move and compress the spring 133, so that the outer tube 111 has a certain amount of space for movement, thereby indirectly improving the service life of the device. The parts not mentioned in this device are the same as the existing technology or can be implemented using existing technology.

[0037] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A leak-proof hydraulically controlled reversing valve, comprising a valve body (100), characterized in that: The two sides of the valve body (100) are connected with a docking assembly (110), and the docking assembly (110) includes an outer cylinder (111) assembled on one side of the valve body (100), a locking ring (114) is sleeved on the end of the outer cylinder (111), and two groups of clamping blocks (115) are fixed on the curved inner wall of the locking ring (114), and two groups of return springs (116) fixed to the valve body (100) are provided in the outer cylinder (111), and the other end of the return spring (116) is fixed with a retaining ring (117) slidingly arranged on the inner wall of the outer cylinder (111), and a docking pipe (112) connected to the valve body (100) is sleeved in the retaining ring (117), and the end of the docking pipe (112) is assembled with an outer tube assembly (120); The outer tube assembly (120) includes a docking tube (121) sleeved on the outer wall of the docking tube (112); the outer tube (122) is fixed to the end of the docking tube (121) away from the docking tube (112); two groups of clamping grooves (123) are opened on the curved outer wall of the docking tube (121); the clamping grooves (123) extend to the interior of the locking ring (114) and are movably connected to the clamping block (115).

2. The anti-leakage hydraulically controlled reversing valve according to claim 1, characterized in that: The outer wall of the docking tube (112) is sleeved with multiple groups of rubber rings (113), and the inner wall of the docking tube (121) is provided with an annular groove (124) that matches the rubber ring (113).

3. The anti-leakage hydraulically controlled reversing valve according to claim 1, characterized in that: An adjustment ring extending into the interior of the outer cylinder (111) is fixed to the end of the locking ring (114); an adjustment groove is provided inside the annular inner wall of the end of the outer cylinder (111); and a torsion spring connected to the adjustment groove is sleeved on the outer wall of the adjustment ring.

4. The anti-leakage hydraulically controlled reversing valve according to claim 1, characterized in that: An inner ring groove (118) is formed on the inner wall of one end of the outer cylinder (111) close to the valve body (100), an inner cylinder (130) fixed to the valve body (100) is sleeved inside the inner ring groove (118), and a blind hole (132) is formed on the end of the inner cylinder (130) close to the locking ring (114).

5. The anti-leakage hydraulically controlled reversing valve according to claim 4, characterized in that: A guide rod (131) extending into the blind hole (132) is fixed inside the inner ring groove (118), and a spring (133) is sleeved on the outer wall of the guide rod (131). The two ends of the spring (133) are respectively fixed to the inner wall of the inner ring groove (118) and the inner side wall of the blind hole (132).

6. The anti-leakage hydraulically controlled reversing valve according to claim 1, characterized in that: Two groups of constraint strips are transversely fixed to the outer wall of the butt-joint pipe (112), and a constraint transverse groove matching the constraint strips is opened on the inner wall of the butt-joint pipe (112).

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