Hydraulic control type reversing valve

Abstract

The utility model relates to a hydraulic control type reversing valve which comprises a valve body, a second oil outlet, an oil inlet, a first oil outlet and an oil port are sequentially formed in the valve body from left to right, a valve element is movably arranged in the valve body, a sliding rod is arranged at the left end of the valve element, the sliding rod extends leftwards and penetrates out of the valve body, and a sealing mechanism is arranged between the valve body and the sliding rod. The left side of the valve body is provided with an abutting plate used for abutting against the left end of the sliding rod, the valve body is provided with a displacement mechanism, the displacement mechanism is used for changing the left-right position of the abutting plate, and through the structure, the displacement mechanism can drive the abutting plate to move rightwards so as to push the valve element rightwards; and the flow direction of the fluid is changed from the first oil outlet to the second oil outlet, so that an emergency reversing effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reversing valve technical field, especially a liquid control type reversing valve. BACKGROUND

[0002] Figure 1 For the overall structure schematic diagram of prior art liquid control type reversing valve, before the pressure at oil port 1 rises to be able to overcome spring opening pressure, fluid flows between inlet oil port 2 and first outlet oil port 3 and is cut off at second outlet oil port 4.

[0003] The power of the left movement of the valve core in the structure is solved by the oil pressure provided by the external equipment, but the power of the right movement of the valve core only relies on the spring in the valve body, and the drawbacks of the structure are that the spring cannot normally push the valve core to the ideal working position if the spring breaks or the compression exceeds the limit, and the valve core has no other way to move right. UTILITY MODEL CONTENTS

[0004] The utility model provides a liquid control type reversing valve, solves the above -mentioned problems existing in the prior art in use.

[0005] The technical scheme of the utility model is realized as follows: a liquid control type reversing valve, comprising a valve body, the valve body is sequentially provided with a second outlet oil port, an inlet oil port, a first outlet oil port and an oil port from left to right, a valve core is movably arranged in the valve body, a sliding rod is arranged at the left end of the valve core, the sliding rod extends leftwards and penetrates out of the valve body, a sealing mechanism is arranged between the valve body and the sliding rod, a resisting plate for resisting the left end of the sliding rod is arranged on the left side of the valve body, a displacement mechanism is arranged on the valve body, and the displacement mechanism is used for changing the left-right position of the resisting plate.

[0006] The utility model is further provided as follows: the displacement mechanism comprises an operation bin fixedly arranged on the left side of the valve body, an operation rod is arranged on the operation bin, the operation rod is rotatably arranged in the operation bin and is connected with the resisting plate in linkage, the left end of the operation rod extends leftwards and penetrates out of the operation bin, and the operation rod drives the resisting plate to displace in the left-right direction by rotating.

[0007] The utility model is further provided as follows: the operation rod is parallel with the sliding rod and extends in the same direction, a threaded hole is formed in the resisting plate, the inner side wall of the threaded hole is connected with the outer side wall of the operation rod in threaded cooperation, and the resisting plate is slidably arranged in the operation bin.

[0008] The present invention is further configured such that: a guide post is fixedly provided inside the operating chamber, and a sliding groove is provided on one side of the threaded hole of the abutment plate, and the guide post is sleeved in the sliding groove.

[0009] The present invention is further configured such that: a limiting block is provided at the left end of the sliding rod, and the limiting block is used to abut against the left end of the valve body.

[0010] The present invention is further configured such that: a groove is provided on the right side wall of the supporting plate, and the position of the groove corresponds to the position of the limiting block.

[0011] The present invention is further configured such that a chamfer is provided between the right end of the groove and the right end face of the abutment plate.

[0012] The present invention is further configured such that the sealing mechanism includes a sealing ring.

[0013] In summary, the beneficial effects of this utility model are as follows:

[0014] 1. Through this structure, the displacement mechanism can drive the support plate to move to the right, thereby pushing the valve core to the right, changing the flow direction of the fluid from the first oil outlet to the second oil outlet, thus playing the role of emergency reversal.

[0015] 2. The operating lever can push the abutment plate to the right through the threaded transmission principle, thereby enabling the abutment plate to push the valve core to the left. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a hydraulically controlled directional valve in the prior art.

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0020] The following are the labels in the diagram: 1 Oil port, 2 Oil inlet, 3 First oil outlet, 4 Second oil outlet, 5 Valve body, 51 Valve core, 511 Sliding rod, 52 Sealing ring, 61 Support plate, 62 Operating chamber, 63 Operating lever, 64 Threaded hole, 65 Guide post, 66 Sliding groove, 67 Limit block, 68 Groove, 69 Chamfer. Detailed Implementation

[0021] The following will refer to the appendix in the embodiments of this utility model. Figures 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Example:

[0023] like Figures 1 to 3 As shown, this utility model discloses a hydraulically controlled directional valve, including a valve body 5. Similar to the prior art, the valve body 5 has a second oil outlet 4, an oil inlet 2, a first oil outlet 3 and an oil port 1 arranged from left to right. At the same time, the valve body 5 is also provided with valve core 51, spring and other components.

[0024] A sliding rod 511 is provided at the left end of the valve core 51. The sliding rod 511 extends to the left and passes through the valve body 5. At the same time, a limit block 67 is provided at the left end of the sliding rod 511. The limit block 67 is used to abut against the left end of the valve body 5. A sealing ring 52 is provided between the valve body 5 and the sliding rod 511.

[0025] A support plate 61 is provided on the left side of the valve body 5 for abutting against the left end of the sliding rod 511. At the same time, a displacement mechanism is provided on the valve body 5 for changing the left and right positions of the support plate 61.

[0026] The displacement mechanism specifically includes an operating chamber 62 fixedly installed on the left side of the valve body 5. An operating rod 63 is rotatably installed inside the operating chamber 62. The left end of the operating rod 63 extends to the left and passes through the operating chamber 62 to facilitate rotation of the operating rod 63. In this structure, the operating rod 63 is parallel to the sliding rod 511 and extends in the same direction. Meanwhile, a threaded hole 64 is provided on the abutment plate 61. The inner wall of the threaded hole 64 is connected to the outer wall of the operating rod 63 through a threaded fit. In addition, a guide post 65 is fixedly installed inside the operating chamber 62. Correspondingly, a sliding groove 66 is provided on one side of the threaded hole 64 on the abutment plate 61, and the guide post 65 is sleeved in the sliding groove 66. Through the cooperation of the guide post 65 and the sliding groove 66, the abutment plate 61 slides left and right inside the operating chamber 62.

[0027] With this structural design, when the spring malfunctions and can no longer push the valve core 51 to the right, the operating lever 63 can be rotated to move the abutment plate 61 to the right. During the movement of the abutment plate 61 to the right, it first abuts against the left end of the sliding rod 511, and then pushes the sliding rod 511 to the right, thereby causing the valve core 51 to move to the right as well. When the valve core 51 needs to move to the left, the operating lever 63 can be rotated in the opposite direction to move the abutment plate 61 to the left to a suitable position. The ideal position of the abutment plate 61 is as follows: when the external equipment provides oil pressure to push the valve core 51 to move to the left, the ideal stopping position of the valve core 51 is exactly the position where the abutment plate 61 abuts against the sliding rod 511. This design can serve as an emergency reversal mechanism.

[0028] Furthermore, a groove 68 is provided on the right side wall of the abutment plate 61, the position of which corresponds to the position of the limiting block 67. At the same time, a chamfer 69 is provided between the right end of the groove 68 and the right end face of the abutment plate 61.

[0029] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid control reversing valve, comprising a valve body (5) which is sequentially provided with a second oil outlet (4), an oil inlet (2), a first oil outlet (3) and an oil port (1) from left to right, and a valve core (51) movably arranged in the valve body (5), characterized in that: The left end of the valve core (51) is provided with a sliding rod (511), which extends to the left and penetrates out of the valve body (5), and a sealing mechanism is arranged between the valve body (5) and the sliding rod (511). The left side of the valve body (5) is provided with a abutting plate (61) for abutting with the left end of the sliding rod (511), and a displacement mechanism is arranged on the valve body (5) for changing the left and right positions of the abutting plate (61).

2. A pilot operated directional control valve according to claim 1, characterized in that: The displacement mechanism comprises an operation bin (62) fixedly arranged on the left side of the valve body (5), and an operation rod (63) arranged on the operation bin (62), wherein the operation rod (63) is rotationally arranged in the operation bin (62) and is in linkage with the abutting plate (61), and the left end of the operation rod (63) extends to the left and penetrates out of the operation bin (62), and the operation rod (63) drives the abutting plate (61) to displace in the left and right directions by rotating.

3. A pilot operated directional control valve according to claim 2, characterized in that: The operation rod (63) is parallel to the sliding rod (511) and has the same extending direction, the abutting plate (61) is provided with a threaded hole (64), the inner side wall of the threaded hole (64) is connected with the outer side wall of the operation rod (63) through thread cooperation, and the abutting plate (61) is slidably arranged in the operation bin (62).

4. A pilot operated directional control valve according to claim 3, characterized in that: A guide column (65) is fixedly arranged in the operation bin (62), and the abutting plate (61) is provided with a sliding groove (66) on one side of the threaded hole (64), and the guide column (65) is sleeved in the sliding groove (66).

5. A pilot operated directional control valve according to claim 4, characterized in that: The left end of the sliding rod (511) is provided with a limiting block (67), and the limiting block (67) is used for abutting with the left end of the valve body (5).

6. A pilot operated directional control valve according to claim 5, characterized in that: The right side wall of the abutting plate (61) is provided with a groove (68), and the position of the groove (68) corresponds to the position of the limiting block (67).

7. A pilot operated directional control valve according to claim 6, characterized in that: A chamfer (69) is arranged between the right end of the groove (68) and the right end face of the abutting plate (61).

8. A pilot operated directional control valve according to claim 1, characterized in that: The sealing mechanism comprises a sealing ring (52).

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