Manual proportional valve

Abstract

The manual proportional valve comprises a main valve body, a plurality of oil ports are formed in the main valve body, a front end cover and a rear end cover are installed at the two ends of the main valve body respectively, an operating mechanism is further arranged on the front end cover, the output end of the operating mechanism is connected with a control guide rod, an oil channel is formed in the control guide rod, and a valve element is installed on the outer side of the control guide rod. A plug is further arranged in the valve element, a cavity is formed between the plug and the end of the control guide rod, a ball a is installed on the side face of the plug, an ejector rod is arranged at the end of the valve element, a ball b corresponding to the ball a is installed at the end of the ejector rod, and the ejector rod is located in the rear end cover. The oil way switching valve has the advantages that the operating mechanism is manually rotated by a worker, so that the control guide rod is driven to rotate, the oil way on the control guide rod is communicated with different oil ports, the valve element is driven to move axially, oil way switching is achieved, computer control is replaced, and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid machinery manufacturing technical field, especially a hand -operated proportional valve. BACKGROUND

[0002] At present, the flow or moving speed needs to be controlled to reach the desired flow or moving speed in the hydraulic system, and the current common control method is to realize flow control through the flow valve or throttle valve or control through the electromagnetic proportional valve, the system used in these control methods is relatively complex, needs to be based on computer control, leads to high actual cost, and the routine maintenance of the valve has certain cost, which is not conducive to actual control. UTILITY MODEL CONTENTS

[0003] The utility model aims at overcoming the defects of prior art, and provides a hand -operated proportional valve.

[0004] The utility model discloses a hand -operated proportional valve, including main valve body, be provided with a plurality of oil ports on main valve body, and the both ends of main valve body are installed with front end cover and rear end cover respectively, still be provided with operating mechanism on front end cover, and the output of operating mechanism is connected with control guide rod, and be provided with oil channel on control guide rod, and the outside of control guide rod is installed with valve core, and still be provided with plug in valve core, and the end between plug and control guide rod has a cavity, and the side surface of plug is installed with ball a, and the end of valve core is provided with top rod, and the end of top rod is installed with ball b corresponding with ball a, and top rod is located in rear end cover.

[0005] Preferably, the operating mechanism includes a connecting rod, one end of the connecting rod is provided with a mounting slot, the end of the control guide rod is provided with a mounting block corresponding to the mounting slot, the other end of the connecting rod is installed on the connecting block, and the connecting block is provided with an operating handle.

[0006] Preferably, the upper surface of the front end cover is provided with a mounting seat, the mounting seat is rotatably installed with a U-shaped baffle, and the operating handle is located in the groove of the U-shaped baffle.

[0007] Preferably, the end of the valve core and the end of the control guide rod have a containing cavity a, the containing cavity a is provided with a first spring, the other end of the valve core and the top rod have a containing cavity b, and the containing cavity b is provided with a second spring.

[0008] Preferably, a ball groove is formed on the outer wall of the valve core, the inner side of the rear end cover is provided with a limiting groove corresponding to the ball groove, and a steel ball is arranged in the ball groove and the limiting groove.

[0009] Preferably, a sealing seat and a bearing are arranged in the front end cover, the bearing is sleeved on the outer surface of the control guide rod, and a sealing seat is arranged between the connecting block and the bearing.

[0010] Preferably, the oil ports comprise oil port P, oil port T, oil port B and oil port A, five control cavities are formed between the main valve body and the valve core in the axial direction, and the control cavities are a first control cavity, a second control cavity, a third control cavity, a fourth control cavity and a fifth control cavity in the front end cover to the rear end cover direction, the first control cavity and the fifth control cavity are in communication with the oil port T, the second control cavity, the third control cavity and the fourth control cavity are in communication with the oil port A, the oil port P and the oil port B respectively, and the valve core is provided with five groups of oil holes, each group of oil holes corresponds to a control cavity.

[0011] Preferably, the main valve body is further provided with oil port X and oil port Y, the oil port X is located on the side of the oil port A, and the oil port Y is located on the side of the oil port P.

[0012] Preferably, the oil channel is a spiral oil channel, and the oil channel is symmetrically arranged on the control guide rod, and the oil channel is provided with four oil channels.

[0013] Preferably, the connecting block is provided with a square hole, and the end of the connecting rod is located in the square hole.

[0014] The utility model has the following advantages:

[0015] 1, the utility model discloses a staff manual rotation operating mechanism to drive control guide rod rotation, make the oil channel on control guide rod and different oil port communication, thereby drive valve core axial movement, and then realize oil circuit switching, thereby replace computer control, reduced maintenance cost.

[0016] 2, the utility model discloses the side of the plug is installed with the ball a, and the end of the ejector rod is installed with the ball b corresponding with the ball a, thereby in the rotation process, can avoid the excessive wear and tear of plug and ejector rod. DRAWINGS

[0017] Figure 1 It is the structure schematic drawing of manual proportional valve explosion;

[0018] Figure 2 It is the structure schematic drawing of manual proportional valve section;

[0019] Figure 3 It is the structure schematic drawing of the position explosion of connecting rod, control guide rod, plug and valve core;

[0020] Figure 4 It is the structure schematic drawing of oil port position distribution on main valve body;

[0021] In the figure, 1 - front end cover, 2 - bearing, 3 - ball a, 4 - sealing seat, 5 - control guide rod, 6 - first spring, 7 - connecting rod, 8 - operating handle, 9 - main valve body, 10 - second spring, 11 - ball b, 12 - steel ball, 13 - top rod, 14 - rear end cover, 15 - U-shaped baffle, 16 - mounting seat, 17 - connecting block, 18 - operating mechanism, 19 - oil port Y, 20 - oil port P, 21 - oil port T, 22 - oil port B, 23 - oil port A, 24 - oil port X, 25 - mounting block, 26 - mounting groove, 27 - square hole, 28 - valve core, 29 - plug. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0025] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, need explaining further still, unless another explicit provision and limitation, term '' set '', '' install '', '' link '', '' connect '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal communication. For ordinary skilled in the art, can understand the concrete meaning of above-mentioned term in the utility model with specific circumstances.

[0028] In the embodiment, as Figure 1 Indicated, a kind of manual proportional valve, including main valve body 9, several oil ports are provided on main valve body 9, front end cap 1 and rear end cap 14 are respectively installed at both ends of main valve body 9, operation mechanism 18 is further provided on front end cap 1, the output end of operation mechanism 18 is connected with control guide rod 5, oil passage is provided on control guide rod 5, valve core 28 is installed on the outside of control guide rod 5, and plug 29 is further provided in valve core 28, plug 29 and the end portion of control guide rod 5 have a cavity, ball a3 is installed on the side of plug 29, the end of top rod 13 is provided with ball b11 corresponding with ball a3, specifically, by installing ball a3 on the side of plug 29, and installing ball b11 corresponding with ball a3 on the end of top rod 13, to avoid excessive wear of plug 29 and top rod 13 during rotation. Top rod 13 is located in rear end cap 14. By manually rotating operation mechanism 18 by staff, to drive control guide rod 5 to rotate, so that the oil passage on control guide rod 5 is communicated with different oil ports, to drive valve core 28 to move axially, to realize oil passage switching, to replace computer control, reduce maintenance cost. In the embodiment, ball a3 and ball b11 are steel ball or nitrided silicon ceramic ball.

[0029] Further, as Figure 2As shown, the operating mechanism 18 comprises a connecting rod 7, one end of the connecting rod 7 is provided with a mounting groove 26, the end of the control guide rod 5 is provided with a mounting block 25 corresponding to the mounting groove 26, the other end of the connecting rod 7 is mounted on the connecting block 17, and the connecting block 17 is provided with an operating handle 8. Preferably, the connecting block 17 is provided with a square hole 27, and the end of the connecting rod 7 is located in the square hole 27. Specifically, the worker rotates the operating handle 8, since the end of the connecting rod 7 is located in the square hole 27, the square hole 27 mainly provides a mounting reference, the operating handle 8 drives the connecting block 17 to rotate, thereby driving the connecting rod 7 to rotate, since the end of the control guide rod 5 is mounted in the mounting groove 26 at the end of the connecting rod 7, thereby driving the control guide rod 5 to rotate, so that the oil channel on the control guide rod 5 is in communication with different oil ports, thereby driving the spool 28 to move axially, and further realizing oil path switching. Further, the upper surface of the front end cover 1 is provided with a mounting seat 16, the mounting seat 16 is rotatably provided with a U-shaped baffle 15, and the operating handle 8 is located in the groove of the U-shaped baffle 15. Specifically, the U-shaped baffle 15 is rotatably mounted on the mounting seat 16 by bolts, that is, when the operating handle 8 needs to be rotated, the worker first loosens the bolts, and then rotates the U-shaped baffle 15 upward, so that the operating handle 8 no longer interferes with the U-shaped baffle 15, when the operating handle 8 does not need to be rotated, the U-shaped baffle 15 is put down again, so that the operating handle 8 is located in the groove of the U-shaped baffle 15, thereby avoiding misoperation of the operating handle 8. In this embodiment, the front end cover 1 is provided with a sealing seat 4 and a bearing 2, the bearing 2 is sleeved on the outer surface of the control guide rod 5, and the sealing seat 4 is mounted between the connecting block 17 and the bearing 2.

[0030] In this embodiment, the spool 28 has a receiving cavity a between one end and one end of the control guide rod 5, the receiving cavity a is provided with a first spring 6, the spool 28 has a receiving cavity b between the other end and the top rod 13, and the receiving cavity b is provided with a second spring 10. Specifically, during the axial movement of the spool 28, the corresponding side spring is compressed, that is, the main function of the first spring 6 and the second spring 10 is to help the spool 28 and the top rod 13 to reset.

[0031] Further, the outer wall of the spool 28 is provided with a ball groove, the inner side of the rear end cover 14 is provided with a limiting groove corresponding to the ball groove, and the ball groove and the limiting groove are provided with a steel ball 12, that is, the steel ball 12 can move along the length direction of the limiting groove, and the steel ball 12 here is a high-precision steel ball with a size of 0.003 mm.

[0032] In this embodiment, as shown in Figure 3 and Figure 4As shown, the oil ports include an oil port P20, an oil port T21, an oil port B22, and an oil port A23, five control cavities are formed between the main valve body 9 and the valve core 28 in the axial direction, and the control cavities are sequentially a first control cavity, a second control cavity, a third control cavity, a fourth control cavity, and a fifth control cavity from the front end cover 1 to the rear end cover 14, the first control cavity and the fifth control cavity are in communication with the oil port T21, the second control cavity, the third control cavity, and the fourth control cavity are in communication with the oil port A23, the oil port P20, and the oil port B22 respectively, and the valve core 28 is provided with five groups of oil holes, each group of oil holes corresponds to a control cavity. Specifically, the oil holes are circular holes, each group of circular holes is 6 holes and is uniformly distributed, from left to right, the first group of circular holes is in communication with the oil port T21, the second group of circular holes is in communication with the oil port A23, the third group of circular holes is in communication with the oil port P20, the fourth group of circular holes is in communication with the oil port B22, and the fifth group of circular holes is also in communication with the oil port T21 through the internal oil passage of the main valve body 9. Further, the oil channel is a spiral oil channel, and the oil channel is symmetrically arranged on the control guide rod 5, and the oil channel is provided with four oil channels. Specifically, when the staff rotates the operating handle 8 to drive the control guide rod 5 to rotate clockwise, a throttle is formed between the control guide rod 5 and the valve core 28, when the spiral oil channel on the control guide rod 5 is in communication with the oil port P20, high-pressure oil enters the left end of the valve core 28 through the spiral oil channel on the control guide rod 5, and pushes the valve core 28 to move rightward (moves away from the operating handle 8 in the axial direction), so that the oil port P20 is in communication with the oil port B22 and the oil port A23 is in communication with the oil port T21. When the staff rotates the operating handle 8 to drive the control guide rod 5 to rotate counterclockwise, a throttle is formed between the control guide rod 5 and the valve core 28, the containing cavity a is in communication with the oil port T21 through the spiral oil channel, so that the oil in the containing cavity a flows out, under the action of the first spring 6 and the second spring 10, the valve core 28 is pushed to move toward the operating handle 8 in the axial direction, so that the oil port P20 is in communication with the oil port A23, and the oil port B22 is in communication with the oil port T21. In this embodiment, when the manual proportional valve is in the middle position, the oil port P20, the oil port T21, the oil port A23, and the oil port B22 are not in communication.

[0033] Further, the main valve body 9 is further provided with an oil port X24 and an oil port Y19, the oil port X24 is located on one side of the oil port A23, and the oil port Y19 is located on one side of the oil port P20. Specifically, the main function of the oil port X24 and the oil port Y19 is to improve adaptability, in order to keep consistent with the existing market interface.

[0034] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A manual proportional valve characterized by: The utility model provides a valve, including main valve body (9), be provided with a plurality of oil ports on main valve body (9), the both ends of main valve body (9) are installed front end cover (1) and rear end cover (14) respectively, front end cover (1) is provided with operating mechanism (18) still, the output of operating mechanism (18) is connected with control guide rod (5), control guide rod (5) is provided with oil channel, the outside of control guide rod (5) is installed valve core (28), and the inside of valve core (28) is provided with plug (29) still, plug (29) and the end of control guide rod (5) have a cavity, the side surface of plug (29) is installed ball a (3), the end of valve core (28) is provided with top rod (13), the end of top rod (13) is installed ball b (11) with ball a (3) corresponds, top rod (13) is located in rear end cover (14).

2. The manual proportional valve of claim 1, wherein: The operating mechanism (18) includes a connecting rod (7), one end of the connecting rod (7) is provided with a mounting groove (26), the end of the control guide rod (5) is provided with a mounting block (25) corresponding to the mounting groove (26), the other end of the connecting rod (7) is mounted on the connecting block (17), and the connecting block (17) is provided with an operating handle (8).

3. The manual proportional valve of claim 2, wherein: The upper surface of the front end cover (1) is provided with a mounting seat (16), the mounting seat (16) is rotatably provided with a U-shaped baffle (15), and the operating handle (8) is located in the groove of the U-shaped baffle (15).

4. The manual proportional valve of claim 3, wherein: The end of the valve core (28) and the end of the control guide rod (5) have a containing cavity a, the containing cavity a is provided with a first spring (6), and the other end of the valve core (28) and the top rod (13) have a containing cavity b, the containing cavity b is provided with a second spring (10).

5. The manual proportional valve of claim 4, wherein: A ball groove is formed in the outer wall of the valve core (28), the inner side of the rear end cover (14) is provided with a limiting groove corresponding to the ball groove, and a steel ball (12) is arranged in the ball groove and the limiting groove.

6. The manual proportional valve of claim 5, wherein: The front end cover (1) is provided with a sealing seat (4) and a bearing (2), the bearing (2) is sleeved on the outer surface of the control guide rod (5), and the sealing seat (4) is mounted between the connecting block (17) and the bearing (2).

7. The manual proportional valve of claim 6, wherein: The oil ports include an oil port P (20), an oil port T (21), an oil port B (22), and an oil port A (23), five control cavities are formed between the main valve body (9) and the valve core (28) in the axial direction, and the five control cavities are a first control cavity, a second control cavity, a third control cavity, a fourth control cavity, and a fifth control cavity in the direction from the front end cover (1) to the rear end cover (14). The first control cavity and the fifth control cavity are in communication with the oil port T (21), the second control cavity, the third control cavity, and the fourth control cavity are in communication with the oil port A (23), the oil port P (20), and the oil port B (22) respectively, and the valve core (28) is provided with five groups of oil holes, each group of oil holes corresponds to one control cavity.

8. The manual proportional valve of claim 7, wherein: The main valve body (9) is further provided with an oil port X (24) and an oil port Y (19), the oil port X (24) is located on one side of the oil port A (23), and the oil port Y (19) is located on one side of the oil port P (20).

9. The manual proportional valve of claim 8, wherein: The oil channel is a spiral oil channel, and the oil channels are symmetrically arranged on the control guide rod (5), and four oil channels are arranged in total.

10. The manual proportional valve of claim 2, wherein: A square hole (27) is formed in the connecting block (17), and the end of the connecting rod (7) is located in the square hole (27).

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