CN211820974U

CN211820974U - Single-spool multifunctional valve

Info

Publication number: CN211820974U
Application number: CN202020406549.1U
Authority: CN
Inventors: 张景胜; 胡英; 孙丰迎; 解瑞江
Original assignee: China First Heavy Industries Co Ltd; CFHI Dalian Engineering and Technology Co Ltd
Current assignee: China First Heavy Industries Co Ltd; CFHI Dalian Engineering and Technology Co Ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-10-30
Anticipated expiration: 2030-03-26

Abstract

The utility model provides a single-valve-element multifunctional valve. The method comprises the following steps: the multifunctional valve comprises a valve cover, a valve body, an adjusting rod, a valve rod, a locking nut, a valve core, a valve sleeve, a limiting sleeve and a spring, wherein the valve cover is detachably fixed on the valve body, the valve sleeve is arranged inside the valve body, the valve core is arranged at the lower part inside the valve sleeve, the limiting sleeve is arranged at the upper part inside the valve sleeve, the spring is arranged inside the valve core, the upper end of the spring is connected with the valve rod, the valve rod is in end surface contact with the adjusting rod, the adjusting rod penetrates through the valve cover, the locking nut matched with the adjusting rod is arranged at the upper end of the valve cover and used for fixing the adjusting rod at a preset position, the multifunctional valve is adjusted into a stop function, a. The utility model discloses utilize single case, single valve rod, single spring to realize stop valve, forward throttle reverse check valve, adjustable opening pressure check valve and relief valve function technique as an organic whole, use extensively.

Description

Single-spool multifunctional valve

Technical Field

The utility model relates to a fluid drive technical field especially relates to a single-valve-element multifunctional valve.

Background

Valves are plumbing accessories used to open and close a pipe, control flow direction, regulate and control parameters of the transport medium (temperature, pressure and flow). Check valves, also known as check valves or back valves, are used in hydraulic systems to prevent reverse flow of oil or in pneumatic systems to prevent reverse flow of compressed air. A throttle valve is a valve that controls the flow of fluid by changing the throttle section or throttle length. The stop valve depends on the pressure of the valve rod to make the sealing surface of the valve core tightly attached to the sealing surface of the valve seat to prevent the medium from flowing. The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of spring force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. The valves are common valves in the prior art, and each valve only has unique characteristics and has no general applicability.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned technical problems, a single-spool multifunctional valve and a function adjusting method thereof are provided. The utility model discloses a technical means as follows:

a single-spool multifunctional valve comprising: the multifunctional valve comprises a valve cover, a valve body, a valve core, a valve sleeve, a limiting sleeve and a valve rod, and further comprises an adjusting rod, a locking nut and a spring, wherein the valve cover is detachably fixed on the valve body, the contact part of the lower part of the valve sleeve and the valve core is equivalent to a valve seat, the valve sleeve is arranged in the valve body, the valve core is arranged at the lower part in the valve sleeve, the limiting sleeve is arranged at the upper part in the valve sleeve, the spring is arranged in the valve core, the upper end of the spring is connected with the valve rod, the adjusting rod penetrates through the valve cover, the valve rod is in end surface contact with the adjusting rod, the locking nut matched with the adjusting rod is arranged at the upper end part of the; A. the opening degree of the opening B is smaller than the function of a forward throttling reverse check valve of the maximum stroke of the valve core; the opening pressure of the check valve or the safety valve is adjustable, wherein the limiting sleeve is used for limiting the maximum opening degree of the valve core, and the number of the adjusting rod, the valve core and the spring is one.

Furthermore, the lower part of the spring is guided by an inner hole of the valve core, and the upper part of the spring is guided by the valve rod.

Furthermore, the compression amount of a spring in the valve core is set by driving the position of the valve rod by an adjusting rod; the limiting sleeve limits the maximum opening of the valve port, and when the valve is used as a one-way valve or a safety valve, the maximum opening of the valve port of the valve is not changed when the opening pressure is adjusted.

The multifunctional valve adjusts 1) the multifunctional valve to realize the one-way flow and simultaneously has the throttling function by adjusting the distance of the adjusting rod protruding out of the valve cover; 2) the pressure limiting valve is used as a one-way valve or a safety valve for pressure limiting; 3) when the device is overhauled, the device is manually closed, and the medium on the side which is not overhauled is prevented from leaking. The utility model discloses utilize single case, single valve rod, single spring to realize multi-functional technique as an organic whole, use extensively. The valve opening pressure can be adjusted, and the weakening of the elasticity of the spring can be compensated or the optimal opening pressure can be adjusted by increasing the pretightening force.

Based on the reason, the utility model discloses can extensively promote in fluid drive technical field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a state diagram of the check valve in the embodiment of the present invention when the check valve is in the stop function.

Fig. 2 is a state diagram of the check valve in the embodiment of the present invention when the check valve is in the forward throttling reverse check function.

Fig. 3 is a state diagram of the check valve in the embodiment of the present invention when the check valve is in the function of the check valve or the safety valve.

In the figure: 1. adjusting a rod; 2. a valve stem; 3. a spring; 4. a valve core; 5. a valve housing; 6. a valve cover; 7. a valve body; 8. a limiting sleeve; 9. a hand wheel; 10. a nut; 11. locking the nut; 12. a bolt; 13. a gasket; 14. a first seal ring; 15. a second seal ring; 16. a third seal ring; 17. and a fourth seal ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the present embodiment discloses a single-spool multifunctional valve, which includes: the valve comprises a valve cover 6, a valve body 7, a valve core 4, a valve sleeve 5, a limiting sleeve 8, a valve rod 2, an adjusting rod 1, a locking nut 11 and a spring 3, wherein the valve cover 6 is detachably fixed on the valve body 7 through a bolt 12, and a gasket 13 is arranged between the valve cover and the valve body 7. The contact part of the lower part of the valve sleeve 5 and the valve core 4 is equivalent to a valve seat, the valve sleeve 5 is arranged in the valve body 7, the valve core 4 is arranged at the lower part in the valve sleeve 5, the limiting sleeve 8 is arranged at the upper part in the valve sleeve 5, the spring 3 is arranged in the valve core 4, the upper end of the spring is connected with the valve rod 2, the lower part of the adjusting spring 3 is guided by an inner hole of the valve core 4, and the upper part. The adjusting rod 1 penetrates through the valve cover 6, the valve rod 2 is contacted with the end face of the adjusting rod 1, the locking nut 11 matched with the adjusting rod 1 is arranged at the upper end part of the valve cover 6 and used for fixing the adjusting rod 1 at a preset position, and the multifunctional valve is adjusted to have a cut-off function of completely blocking A, B opening media from flowing by adjusting the distance of the adjusting rod 1 protruding out of the valve cover 6; A. the opening degree of the opening B is smaller than the function of a forward throttling reverse check valve of the maximum stroke of the valve core; the pressure-adjustable one-way valve or the safety valve has the function of adjustable pressure, wherein the limiting sleeve 8 is used for limiting the maximum opening degree of the valve core, and the number of the adjusting rod, the valve core and the spring is one.

The upper end of the adjusting rod is connected with a hand wheel 9, and the hand wheel 9 is fixed by a nut 10 after the relative position of the adjusting rod 1 and the hand wheel 9 is determined.

And a sealing structure is arranged between the valve body 7 and the valve cover 5, and specifically comprises a second sealing ring 15 between the valve cover 5 and the valve cover 6, a third sealing ring 16 between the side wall of the valve cover 5 and the valve body 7, and a fourth sealing ring 17 between the valve cover base and the valve body 7.

The valve core 4 and the limiting sleeve 8 are matched with the valve sleeve 5, the outside of the limiting sleeve 8 is fastened through the valve sleeve 5, the lower end of the limiting sleeve is used for limiting the maximum stroke of the valve core, and a pore channel is arranged in the valve core 4.

A first sealing ring 14 is arranged between the valve rod 2 and the valve cover 6.

The maximum stroke of the valve core 4 is S0, the maximum stroke of the valve rod 2 is H0, H0> S0, and FIG. 1 shows a cut-off function. Specifically, the adjusting hand wheel 9 is adjusted, the adjusting rod 1 moves downwards to drive the valve rod 2 to move downwards, the valve rod 2 acts on the lowest end inside the valve core 4, the valve core 4 is tightly pressed on a valve seat at the lower end of the valve sleeve 5, the valve is closed and is in a complete stop state, and the valve can be kept in the function by screwing the locking nut 11.

Fig. 2 shows the forward throttling and reverse check functions. The stroke H of the valve rod 2 is less than the maximum stroke S0 of the valve core 4, namely H < S0.

The positions of the spool and stem in fig. 1 are referenced. And the adjusting hand wheel 9 is used for adjusting the rod 1 to move upwards H from the stop function position and driving the valve rod 2 to move upwards H from the stop function position. When the pressure difference at the port A, B is larger than the set spring force, the valve core 4 is opened upwards, the spring 3 is compressed, the valve is opened, the opening degree is equal to the valve core stroke S, and S is less than S0, so that the throttling function is realized. When the pressure difference at port A, B is smaller than the set spring force, the valve core 4 is pressed on the lower end valve seat of the valve sleeve 5, and the valve is closed and is in a complete cut-off state. This achieves a throttling function, which is maintained by tightening the union nut 11 after the adjustment has been completed.

Fig. 3 shows a one-way or safety valve function, achieving a set pressure between a maximum and a minimum pressure.

The stroke H of the valve rod 2 is larger than the maximum stroke S0 of the valve core 4 and smaller than the maximum stroke H0 of the valve rod 2, namely S0< H < H0.

The positions of the spool and stem in fig. 1 are referenced. And when the pressure difference of the A, B port is less than the set spring force, the valve core 4 is pressed on the valve seat at the lower end of the valve sleeve 5, the valve is closed, and the valve is in a complete cut-off state. When the pressure difference of the A, B ports is larger than the set spring force, the valve core 4 is opened upwards, the spring 3 is compressed, the valve is completely opened, the opening degree is equal to the maximum stroke S0 of the valve core, and the function of the one-way valve is realized. The valve can also be used as a safety valve because the opening pressure is adjustable. The regulating hand wheel 9, when the regulating rod 1 moves up H0 from the stop function position, realizes the function of the minimum opening pressure check valve or the safety valve. When the control rod 1 is moved upwards from the blocking position S0, the maximum opening pressure check valve or safety valve function is realized, and after the control is completed, the valve is held in this function by tightening the union nut 11.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A single-spool multifunctional valve comprising: the multifunctional valve is characterized by further comprising an adjusting rod, a locking nut and a spring, wherein the valve cover is detachably fixed on the valve body, the contact part of the lower part of the valve cover and the valve core is equivalent to a valve seat, the valve cover is arranged in the valve body, the valve core is arranged at the lower part in the valve cover, the limiting sleeve is arranged at the upper part in the valve cover, the spring is arranged in the valve core, the upper end of the spring is connected with the valve rod, the adjusting rod penetrates through the valve cover, the valve rod is in end surface contact with the adjusting rod, the locking nut matched with the adjusting rod is arranged at the upper end part of the valve cover and used for fixing the adjusting rod at a preset position, and the multifunctional valve is adjusted to have a stop function of completely; A. the opening degree of the opening B is smaller than the function of a forward throttling reverse check valve of the maximum stroke of the valve core; the opening pressure of the check valve or the safety valve is adjustable, wherein the limiting sleeve is used for limiting the maximum opening degree of the valve core, and the number of the adjusting rod, the valve core and the spring is one.

2. The single spool multifunctional valve of claim 1, wherein the spring is guided by the spool bore at a lower portion and by the stem at an upper portion.

3. The single spool multifunctional valve according to claim 1, wherein the spring compression of the spring in the spool is set by the position of the valve stem driven by the adjusting rod; the limiting sleeve limits the maximum opening of the valve port, and when the valve is used as a one-way valve or a safety valve, the maximum opening of the valve port of the valve is not changed when the opening pressure is adjusted.