CN109236781B

CN109236781B - Time sequence valve

Info

Publication number: CN109236781B
Application number: CN201811356573.2A
Authority: CN
Inventors: 林宇
Original assignee: Zhejiang Fengzhou Precision Manufacturing Co ltd
Current assignee: Zhejiang Fengzhou Precision Manufacturing Co ltd
Priority date: 2018-11-14
Filing date: 2018-11-14
Publication date: 2023-07-21
Anticipated expiration: 2038-11-14
Also published as: CN109236781A

Abstract

The invention relates to the technical field of sequence valves, in particular to a time sequence valve. The time sequence valve comprises a cylinder body, a valve body, a piston rod, a blocking body and a throttle valve; a first cavity is formed in the cylinder body, and a second cavity which is opposite to and communicated with the first cavity is formed in the valve body; the piston and the piston rod are both positioned in the first cavity, and the piston is in sealing sliding fit with the first cavity; the valve body is provided with an oil inlet and an oil outlet which are communicated through the oil channel, the blocking body is positioned in the second cavity, the blocking body can block the oil channel when in a blocking position, and the piston rod is used for pushing the blocking body to leave the blocking position; the throttle valve is arranged on the valve body, a groove is arranged between the piston and the bottom of the cylinder body, the inlet end of the throttle valve is communicated with the oil inlet, and the outlet end of the throttle valve is communicated with the groove. The time sequence valve can bear larger oil pressure and has good sequence adjusting stability.

Description

Time sequence valve

Technical Field

The invention relates to the technical field of sequence valves, in particular to a time sequence valve.

Background

Sequence valves are widely used in hydraulic drive systems to enable adjustment of the opening sequence of actuators in the system.

The existing sequence valve generally adjusts the opening pressure of the steel balls blocking the oil way through adjusting the elasticity of the spring, so as to realize the function of adjusting the opening sequence of the executing element. However, the spring in the sequence valve needs to bear the pressure of oil, and the maximum working load of the spring is limited, so that the maximum oil pressure which the sequence valve can bear is limited; in addition, oil pressure fluctuation, the spring itself can inevitably have manufacturing errors, the linear relation is unstable in the use process of the spring, and the use time of the spring is long, so that the sequence adjusting stability of the sequence valve can be influenced.

In summary, how to overcome the above-mentioned drawbacks of the conventional sequence valve is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a time sequence valve so as to solve the technical problems of limited bearing maximum oil pressure and poor sequence stability of the sequence valve in the prior art.

The invention provides a time sequence valve which comprises a cylinder body, a valve body, a piston rod, a blocking body and a throttle valve.

The valve body is fixedly connected with the cylinder body, a first cavity is formed in the cylinder body, and a second cavity which is opposite to and communicated with the first cavity is formed in the valve body; the piston and the piston rod are both positioned in the first cavity, and the piston is in sealing sliding fit with the first cavity; the valve body is provided with an oil inlet and an oil outlet, the oil inlet is communicated with the oil outlet through an oil path channel, the blocking body is positioned in the second cavity, the blocking body can block the oil path channel when in a blocking position, and the piston rod is used for pushing the blocking body to leave the blocking position.

The throttle valve is arranged on the valve body, a groove is arranged between the piston and the bottom of the cylinder body, the inlet end of the throttle valve is communicated with the oil inlet, and the outlet end of the throttle valve is communicated with the groove.

Preferably, as an implementation manner, a valve sleeve and a push rod are further arranged in the second cavity of the valve body, a first guide hole is formed in the valve sleeve, the push rod is located in the first guide hole and is in sealing sliding fit with the first guide hole, and the push rod is abutted to the blocking body; the piston rod is used for pushing the push rod to move.

Preferably, as an implementation manner, a guide sleeve is fixedly arranged between the first cavity and the second cavity, a second guide hole is formed in the guide sleeve, and the piston rod is in sliding fit with the second guide hole.

Preferably, as an implementation manner, a first elastic structural member is disposed in the first cavity, one end of the first elastic structural member is connected with the piston, and the other end of the first elastic structural member is connected with the guide sleeve.

Preferably, as an implementation manner, a second elastic structural member is disposed in the second cavity, one end of the second elastic structural member is connected with the bottom of the second cavity, and the other end of the second elastic structural member is abutted against the blocking body.

Preferably, as an implementation manner, the second guiding hole is a stepped hole, a limiting cap is installed at one end of the second guiding hole with a larger aperture, and the step of the second guiding hole is used for limiting the limiting cap; the top of the limiting cap is abutted with the push rod, and the piston rod is used for pushing the limiting cap to move in the second guide hole.

Preferably, as an implementation manner, the first elastic structural member is a rectangular spring, and the expansion direction of the rectangular spring is the same as the moving direction of the piston.

Preferably, as an implementation manner, a plurality of one-way valves are installed on the valve body, and an inlet end of each one-way valve is communicated with the oil outlet.

Preferably, as an implementation manner, the cylinder body and the valve body are provided with mutually communicated diversion holes, one end of each diversion hole is communicated with the outlet end of the throttle valve, and the other end of each diversion hole is communicated with the groove.

Preferably, as an implementation manner, the groove is formed on the circular end face of the piston, and the groove is annular.

Compared with the prior art, the invention has the advantages that:

according to the time sequence valve provided by the invention, the oil inlet and the oil outlet on the valve body are communicated through the oil path channel, the blocking body is positioned at the blocking position in the initial state, and the blocking body can block the oil path channel between the oil inlet and the oil outlet; that is, the oil entering the oil passage from the oil inlet is blocked by the blocking body, and thus cannot flow out from the oil outlet along the oil passage, that is, cannot supply oil to the corresponding actuator, and the actuator does not operate.

Oil enters from an oil inlet on the valve body and then flows to the throttle valve, and flows to a groove between the piston and the bottom of the cylinder body through the throttle valve, and the piston is in sealing sliding connection with the first cavity, so that the oil flowing into the groove can push the piston to slide in the first cavity, and the piston can drive the piston rod to push the blocking body to move in the second cavity until the blocking body leaves the blocking position; after the blocking body leaves the blocking position, the oil path channel is opened, and the oil entering from the oil inlet flows out from the oil outlet along the oil path channel and is supplied to the corresponding executing element, and the executing element starts to operate.

It should be noted that the oil in the portion of the first chamber between the piston and the bottom of the cylinder needs to reach a desired volume to push the piston to slide to a position that pushes the plug away from the plug position. According to the time sequence valve provided by the invention, the flow passing through the throttle valve in unit time can be regulated by regulating the throttle section of the throttle valve, so that the regulation of the volume of oil flowing into the first cavity in unit time is realized, and the time required for the volume of oil in the first cavity to reach the target value can be regulated, thereby realizing the sequence regulating function.

Obviously, the time sequence valve provided by the invention has the advantages that oil flows in through the throttle valve, the sequence adjustment is realized by adjusting the size of the throttle section of the throttle valve, and the time sequence valve has no direct relation with the pressure of the oil, so that the time sequence valve can bear larger oil pressure; in addition, the moving speed of the piston, namely the time required for the blocking valve to leave the blocking position, is related to the size of the throttling section of the throttling valve, and the problem existing in the spring does not need to be considered, so that the sequencing stability is good.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a time sequence valve according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a timing valve according to an embodiment of the present invention;

FIG. 3 is a schematic A-A cross-sectional view of the time sequence valve of FIG. 2 according to an embodiment of the present invention;

FIG. 4 is a schematic view of a B-B cross-sectional structure of the time sequence valve of FIG. 2 according to the embodiment of the present invention;

FIG. 5 is an enlarged schematic view of the portion C in FIG. 4;

FIG. 6 is an enlarged schematic view of the portion D of FIG. 4;

FIG. 7 is a schematic cross-sectional view of a valve body of the time series valve of FIG. 4 according to an embodiment of the present invention;

FIG. 8 is a schematic view of the E-E cross-sectional structure of the time series valve of FIG. 2 according to the embodiment of the present invention.

Icon: 10-cylinder body; 20-valve body; 30-a piston; 40-a piston rod; 50-blocking body; 60-throttle valve; 70-pushing rod; 80-guiding sleeve; 90-a first elastic structural member; 100-a second elastic structural member; 110-a limit cap; 120-a one-way valve;

101-a first cavity; 102-a deflector aperture;

201-a second cavity; 202-oil inlet; 203-an oil outlet; 204-oil path; 205-valve sleeve;

301-groove.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.

Referring to fig. 1 to 8, the present embodiment provides a time sequence valve including a cylinder 10, a valve body 20, a piston 30, a piston rod 40, a blocking body 50, and a throttle valve 60.

The valve body 20 is fixedly connected with the cylinder body 10, a first cavity 101 is formed in the cylinder body 10, and a second cavity 201 which is opposite to and communicated with the first cavity 101 is formed in the valve body 20; the piston 30 and the piston rod 40 are both positioned in the first cavity 101, and the piston 30 is in sealing sliding fit with the first cavity 101; an oil inlet 202 and an oil outlet 203 are formed in the valve body 20, the oil inlet 202 is communicated with the oil outlet 203 through an oil passage 204, the blocking body 50 is located in the second cavity 201, the blocking body 50 can block the oil passage 204 when in a blocking position, and the piston rod 40 is used for pushing the blocking body 50 to leave the blocking position.

The throttle valve 60 is installed on the valve body 20, a groove 301 is arranged between the piston 30 and the bottom of the cylinder body 10, the inlet end of the throttle valve 60 is communicated with the oil inlet 202, and the outlet end is communicated with the groove 301.

In the time sequence valve provided by the embodiment, the oil inlet 202 and the oil outlet 203 on the valve body 20 are communicated through the oil path channel 204, the blocking body 50 is positioned at the blocking position in the initial state, and at the moment, the blocking body 50 can block the oil path channel 204 between the oil inlet 202 and the oil outlet 203; that is, the oil entering the oil passage 204 from the oil inlet 202 is blocked by the blocking body 50, and cannot flow out of the oil outlet 203 along the oil passage 204, that is, cannot supply oil to the corresponding actuator, and the actuator does not operate.

Oil enters from an oil inlet 202 on the valve body 20 and flows to the throttle valve 60, and flows into a groove 301 between the piston 30 and the bottom of the cylinder body 10 through the throttle valve 60, and as the piston 30 is in sealed sliding connection with the first cavity 101, the oil flowing into the groove 301 pushes the piston 30 to slide in the first cavity 101, and the piston 30 slides to drive the piston rod 40 to push the blocking body 50 to move in the second cavity 201 until the blocking body 50 leaves the blocking position; after the blocking body 50 leaves the blocking position, the oil passage 204 is opened, and the oil entering from the oil inlet 202 flows out from the oil outlet 203 along the oil passage 204 and is supplied to the corresponding actuator, and the actuator starts to operate.

It should be noted that the oil in the portion of the first chamber 101 between the piston 30 and the bottom of the cylinder 10 needs to reach a required volume to push the piston 30 to slide to a position that pushes the blocking body 50 away from the blocking position. According to the time sequence valve provided by the invention, the flow rate passing through the throttle valve 60 in unit time can be adjusted by adjusting the throttle section of the throttle valve 60, so that the volume of oil flowing into the first cavity 101 in unit time can be adjusted, the time required for the volume of oil in the first cavity 101 to reach a target value can be further adjusted, and the sequence adjusting function is realized.

Obviously, in the time sequence valve provided by the embodiment, oil flows in through the throttle valve 60, the sequence is regulated by adjusting the size of the throttle section of the throttle valve 60, and the time sequence valve has no direct relation with the pressure of the oil, so that the time sequence valve can bear larger oil pressure; further, the speed of movement of the piston 30, that is, the length of time required for the block valve to leave the block position, is related to the size of the throttle cross section of the throttle valve 60, and there is no need to consider the problem of the spring itself, so that the stability of the sequence adjustment is good.

The specific structure and technical effects related to the technical scheme of this embodiment are as follows:

referring to fig. 5, a valve housing 205 and a push rod 70 are disposed in the second cavity 201 of the valve body 20, a first guide hole is formed in the valve housing 205, the push rod 70 is disposed in the first guide hole and is in sealing sliding fit with the first guide hole, meanwhile, the push rod 70 is abutted against the blocking body 50, and the push rod 70 can be pushed by the piston rod 40, that is, when the piston 30 is pushed by oil, the piston rod 40 connected with the piston 30 can push the push rod 70 to move, so that the push rod 70 can push the blocking body 50 abutted against the push rod to move, and the blocking body 50 can leave the blocking position.

It should be noted that, the pushing force of the piston rod 40 to the blocking body 50 is transmitted by the push rod 70, and the accommodating hole of the piston rod 40 is not required to be reserved in the valve body 20, so that the tightness of the valve body 20 is ensured, and the oil is prevented from overflowing.

Preferably, a guide sleeve 80 may be fixedly disposed between the first cavity 101 and the second cavity 201, a second guide hole is formed in the guide sleeve 80, and the piston rod 40 is slidably matched with the second guide hole, so as to limit a moving track of the piston rod 40 by using the second guide hole, prevent the piston rod 40 from deviating from a preset track, and ensure that the piston rod 40 can push the push rod 70 to move.

Referring to fig. 4 and 5, in a specific structure, a first elastic structural member 90 may be disposed in the first cavity 101, one end of the first elastic structural member 90 is connected with the piston 30, the other end is connected with the guide sleeve 80, and the guide sleeve 80 is fixedly disposed, so that when the piston 30 moves under the pushing of oil, the first elastic structural member 90 can push the piston 30 in a reverse direction, on one hand, the first elastic structural member 90 can push the piston 30 in a reverse direction in a process that the volume of oil in the first cavity 101 is continuously increased, and sealing of the first cavity 101 is not required, so that the surface of the piston 30 in contact with the oil can be completely in contact with the oil, that is, the linear relationship between the volume of the oil in the first cavity 101 and the moving distance of the piston 30 is ensured, thereby ensuring the stability of sequence adjustment; on the other hand, when the thrust of the oil on the piston 30 disappears, the first elastic structural member 90 can push the piston 30 to return.

Referring to fig. 5, a second elastic structural member 100 is disposed in a second cavity 201, one end of the second elastic structural member 100 is connected to the bottom of the second cavity 201, and the other end is connected to a blocking body 50, in an initial state, the blocking body 50 will stay in a blocking position stably under the action of the second elastic structural member 100, so that oil is prevented from flowing to an oil outlet 203 through an oil path 204, and the blocking effect of the blocking body 50 is ensured; in addition, the second elastic structural member 100 can push the blocking body 50 to reset after the blocking body 50 loses the pushing force of the push rod 70.

Preferably, the second guiding hole on the guiding sleeve 80 may be configured as a stepped hole, so that the limiting cap 110 installed at the end with the larger aperture of the second guiding hole can be limited by the step of the second guiding hole, the top of the limiting cap 110 is abutted against the push rod 70, and the piston rod 40 pushes the limiting cap 110 to move in the second guiding hole, so that the piston rod 40 indirectly pushes the push rod 70 to move through the limiting cap 110; the limiting cap 110 can limit the limiting position of the push rod 70 moving towards the direction of the piston 30, namely, when the piston rod 40 is not in contact with the limiting cap 110, the push rod 70 is ensured to limit the blocking body 50 to a blocking position, and the push rod 70 is prevented from being separated from the first guide hole on the valve sleeve 205, so that the blocking effect of the blocking body 50 on the oil path 204 is ensured, and the tightness of the valve body 20 is ensured.

In particular, the first elastic structural member 90 may be configured as a rectangular spring, and the expansion and contraction direction of the rectangular spring may be set to be the same as the moving direction of the piston 30; the rectangular spring can bear high load when the volume is fixed, so that the use requirement can be met, and the damage probability is reduced.

Preferably, referring to fig. 1, a plurality of check valves 120 may be installed on the valve body 20, and an inlet end of the check valve 120 is communicated with the oil outlet 203, when the valve body 20 returns oil, the oil flowing back from the oil outlet 203 of the valve body 20 can flow out of the check valve 120, so as to achieve the purpose of quick oil return. On this basis, the outlet end of the check valve 120 may be in communication with the tank to allow oil to flow back to the tank.

Specifically, referring to fig. 8, a pilot hole 102 may be formed in the cylinder 10 and the valve body 20 to communicate with each other, and one end of the pilot hole 102 communicates with an outlet end of the throttle valve 60 and the other end communicates with the groove 301, so that oil flowing out of the throttle valve 60 can flow to the groove 301 through the pilot hole 102.

Preferably, the groove 301 may be formed on the circular end surface of the piston 30, and the groove 301 may be provided as an annular groove 301, so that the groove 301 may be always communicated with the guide hole 102 regardless of how much degree of self-rotation the piston 30 may occur in the first chamber 101.

In particular, the occluding body 50 may be provided as a steel ball.

In summary, embodiments of the present invention disclose a time sequence valve that overcomes many of the technical shortcomings of conventional sequence valves. According to the time sequence valve provided by the embodiment of the invention, oil flows in through the throttle valve 60, the sequence adjustment is realized by adjusting the size of the throttle section of the throttle valve 60, and the time sequence valve has no direct relation with the pressure of the oil, so that the time sequence valve can bear larger oil pressure; further, the speed of movement of the piston 30, that is, the length of time required for the block valve to leave the block position, is related to the size of the throttle cross section of the throttle valve 60, and there is no need to consider the problem of the spring itself, so that the stability of the sequence adjustment is good.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The time sequence valve is characterized by comprising a cylinder body, a valve body, a piston rod, a blocking body and a throttle valve;

the valve body is fixedly connected with the cylinder body, a first cavity is formed in the cylinder body, and a second cavity which is opposite to and communicated with the first cavity is formed in the valve body; the piston and the piston rod are both positioned in the first cavity, and the piston is in sealing sliding fit with the first cavity; an oil inlet and an oil outlet are formed in the valve body, the oil inlet is communicated with the oil outlet through an oil path channel, the blocking body is positioned in the second cavity, the blocking body can block the oil path channel when in a blocking position, and the piston rod is used for pushing the blocking body to leave the blocking position;

2. The time sequence valve according to claim 1, wherein a valve sleeve and a push rod are further arranged in the second cavity of the valve body, a first guide hole is formed in the valve sleeve, the push rod is positioned in the first guide hole and is in sealing sliding fit with the first guide hole, and the push rod is abutted with the blocking body; the piston rod is used for pushing the push rod to move.

3. The time sequence valve according to claim 2, wherein a guide sleeve is fixedly arranged between the first cavity and the second cavity, a second guide hole is formed in the guide sleeve, and the piston rod is in sliding fit with the second guide hole.

4. A time sequence valve according to claim 3, wherein a first elastic structure is arranged in the first cavity, one end of the first elastic structure is connected with the piston, and the other end is connected with the guide sleeve.

5. The time sequence valve according to claim 4, wherein a second elastic structural member is arranged in the second cavity, one end of the second elastic structural member is connected with the bottom of the second cavity, and the other end of the second elastic structural member is abutted with the blocking body.

6. The time sequence valve according to claim 5, wherein the second guide hole is a stepped hole, a limit cap is mounted at one end of the second guide hole with a larger hole diameter, and the step of the second guide hole is used for limiting the limit cap; the top of the limiting cap is abutted with the push rod, and the piston rod is used for pushing the limiting cap to move in the second guide hole.

7. The time series valve of claim 4 wherein the first resilient structural member is a rectangular spring and the direction of expansion of the rectangular spring is the same as the direction of movement of the piston.

8. A time sequence valve according to any one of claims 1-7, wherein a number of non-return valves are mounted on the valve body, and wherein the inlet ends of the non-return valves are in communication with the oil outlet.

9. The time sequence valve according to any one of claims 1-7, wherein the cylinder and the valve body are provided with mutually communicated diversion holes, one end of each diversion hole is communicated with the outlet end of the throttle valve, and the other end is communicated with the groove.

10. The time series valve of claim 9, wherein the groove is formed in a circular end surface of the piston, and the groove is annular.