CN216447463U

CN216447463U - Stroke control valve

Info

Publication number: CN216447463U
Application number: CN202123200994.6U
Authority: CN
Inventors: 王江山; 王江海; 黄昆; 许强
Original assignee: Ningbo Shanyan Hydraulic Co ltd
Current assignee: Ningbo Shanyan Hydraulic Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-05-06
Anticipated expiration: 2031-12-17

Abstract

The present invention relates to a stroke control valve, including: a valve body; the sealing device comprises a first sealing ring and a second sealing ring; the valve core is integrally spherical and is positioned between the first sealing ring and the second sealing ring, and the valve core is provided with a first overflowing flow channel which penetrates through the valve core; the valve core is also provided with a second overflowing flow channel communicated with the first overflowing flow channel, the second overflowing flow channel is communicated with a second valve port in a cut-off state, a combined piece formed by sealing and matching the valve core and a second sealing ring is arranged in the valve cavity in a mode of being close to or far away from the first sealing ring, and an overflowing port is formed between the valve core and the first sealing ring in a state of being far away from the first sealing ring and is communicated with the first overflowing flow channel; further comprising: and the spring acts on the second sealing ring, so that the assembly formed by the valve core and the second sealing ring in sealing fit always has the tendency of moving towards the first sealing ring. The stroke control valve has a simple structure, and can realize the one-way circulation function, the stop function and the two-way direct connection function of fluid.

Description

Stroke control valve

Technical Field

The utility model relates to the technical field of control valves, in particular to a stroke control valve.

Background

In a traditional hydraulic control system, a check valve is usually adopted to prevent liquid flow in the hydraulic system from flowing reversely, the check valve generally has the capacity of one-way passage, some check valves can be different according to pressure, when the pressure at the cut-off end is overlarge, the check valve is reversely conducted to release a pressure protection pipeline, the check valve is usually only limited to be used in certain special occasions, the flowing direction of liquid needs to be changed timely for certain pipelines, and the control occasion of the check valve is also needed.

To this end, application No. CN201620313579.1 (No. CN205479537U) discloses a bidirectional adjustable check ball valve, which includes a valve seat, a left valve cover, a right valve cover, a valve core, a valve rod, and a handle, wherein the left valve cover is located on the left end surface of the valve seat, the right valve cover is located on the right end surface of the valve seat, a valve cavity is arranged in the valve seat, a valve core is arranged in the valve cavity, a valve rod groove is formed in the valve core, the valve rod groove is connected to the valve rod, sealing rings are arranged on both sides of the valve core, a valve core cavity is arranged in the valve core, a ball is arranged in the valve core cavity, the valve core can pass liquid or gas medium in one direction, when liquid or gas medium passing in one direction needs to pass through in the reverse direction, the valve core only needs to rotate 180 degrees in the valve seat by rotating the handle, and on the premise of not adding other functional valves, the flow direction conversion of the check valve can be realized, and the access of other functional valves in the pipeline is reduced, the pipeline reliability is increased, the pipeline erection cost is saved, and the operation is simple, safe and reliable.

However, the bidirectional adjustable one-way ball valve in the above patent still has certain disadvantages, and firstly, the one-way ball valve has a stopping function after one-way passing and 180-degree reverse rotation, and can meet the requirements of one-way passing and reverse stopping of fluid, but under some working conditions, the bidirectional adjustable one-way ball valve needs to have a through function of bidirectional conduction, and the bidirectional adjustable one-way ball valve cannot better meet the requirements of one-way flowing, stopping and bidirectional through functions of fluid, so that further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of the prior art and provides a stroke control valve which is simple in structure and can realize the one-way fluid circulation function, the stop function and the two-way direct connection function.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a stroke control valve comprising:

the valve comprises a valve body and a valve body, wherein the valve body is provided with a first valve port, a second valve port and a valve cavity, and the first valve port and the second valve port are communicated with the valve cavity and are positioned on two opposite sides of the valve cavity;

the sealing element is arranged in the valve cavity and comprises a first sealing ring and a second sealing ring which are oppositely arranged at intervals, the first sealing ring is arranged adjacent to the first valve port, and the second sealing ring is arranged adjacent to the second valve port;

the valve core is wholly spherical, is positioned between the first sealing ring and the second sealing ring and is in sealing contact with the first sealing ring and the second sealing ring, is provided with a first overflowing flow channel which penetrates through the valve core, is arranged in the valve cavity in a manner of rotating relative to the sealing element, and at least has an opening state for communicating the first valve port and the second valve port through the first overflowing flow channel and a cut-off state for cutting off a flow path between the first valve port and the second valve port;

the valve core is also provided with a second overflowing flow channel communicated with the first overflowing flow channel, the second overflowing flow channel is communicated with the second valve port in the cut-off state, a combined piece formed by sealing and matching the valve core and the second sealing ring is arranged in the valve cavity in a mode of being close to or far away from the first sealing ring, and an overflowing port is formed between the valve core and the first sealing ring in a state of being far away from the first sealing ring and is communicated with the first overflowing flow channel;

the stroke control valve further includes:

and the spring is arranged in the valve cavity and acts on the second sealing ring, so that the combined part formed by sealing and matching the valve core and the second sealing ring always has the trend of moving towards the first sealing ring.

For convenience of processing and consideration of user operation, the first overflowing flow channel and the second overflowing flow channel are linear flow channels and are perpendicular to each other.

In order to enable the valve core and a combined piece formed by sealing and matching the second sealing ring to move in the left and right directions, the valve core is arranged on the valve body in a vertical rotating mode, a strip-shaped slot is formed in the top of the valve core corresponding to the lower end of the valve rod, the extending direction of the strip-shaped slot is perpendicular to the length direction of the first overflowing flow channel, a flat inserting portion matched with the strip-shaped slot is arranged at the lower end of the valve rod, and the inserting portion extends into the strip-shaped slot.

In order to facilitate the operation of a user, the valve core is driven to rotate, and the valve further comprises a handle connected with the upper end of the valve rod.

In order to facilitate the assembly of the valve core, the sealing element and the spring, the valve body comprises a valve seat, a first joint and a second joint, the valve seat is a hollow cylindrical body with openings at the left end and the right end, and the first joint and the second joint are respectively connected to the openings at the left end and the right end of the valve seat and jointly define the valve cavity.

In order to ensure the sealing performance among the valve core, the first joint and the first sealing ring, the first joint is inserted into one port of the valve seat, and the first sealing ring is in sealing fit with the end face of the first joint.

In order to firmly position the spring and avoid the spring from shaking, the second joint is provided with a positioning groove corresponding to the spring for accommodating the spring.

In order to limit the rotation angle of the valve rod, the valve further comprises a coil spring wound on the upper part of the valve rod, the top of the valve body is also provided with a positioning pin, one end of the coil spring is connected to the positioning pin, and the other end of the coil spring is fixed on the valve rod. When a user rotates the handle, the handle is stressed to overcome the force of the coil spring to rotate, and after the external force is removed from the handle, the coil spring can reset the valve core and the handle.

Compared with the prior art, the utility model has the advantages that: the stroke control valve is characterized in that a valve core is arranged on the valve body, a first overflowing flow channel is arranged on the valve core, a spring which is abutted against the valve core is arranged on the valve core, and the stroke control valve has a one-way flow function on the basis of realizing a fluid stop function and a two-way direct-connection function. The stroke control valve has the advantages of simple structure, no need of greatly improving the original ball valve structure, low production cost and capability of realizing the one-way circulation function, the stop function and the two-way direct connection function of fluid.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention in a bidirectional conducting state;

FIG. 2 is a top view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1 (the two-way conduction state);

FIG. 4 is a schematic structural view of the valve core in FIG. 3 in a one-way communication state;

FIG. 5 is a schematic view of the valve cartridge of FIG. 3 in a shut-off condition;

FIG. 6 is a schematic view of a valve stem and valve cartridge configuration according to an embodiment of the present invention;

fig. 7 is a cross-sectional view at B-B in fig. 6.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Referring to fig. 1 to 7, a stroke control valve includes a valve body 10, a sealing member, a valve cartridge 30, a valve stem 50, a handle 52, a spring 40, and a coil spring 53.

The valve body 10 comprises a valve seat 13, a first connector 11 and a second connector 12.

Referring to fig. 1, the valve seat 13 is a hollow cylinder with left and right openings, and the first joint 11 and the second joint 12 are respectively connected to the left and right openings of the valve seat 13 and together define a valve chamber 100 for accommodating the sealing member, the valve core 30 and the spring 40. Specifically, the first joint 11 and the second joint 12 are both tubular bodies, respectively inserted into openings at the left and right ends of the valve seat 13, and are in sealing fit with the valve seat 13. The inner port of the first joint 11 constitutes a first valve port 101, and the inner port of the second joint 12 constitutes a second valve port 102. The first port 101 and the second port 102 are both in communication with the valve chamber 100 and are located on opposite sides of the valve chamber 100.

The seals comprise a first seal ring 21 and a second seal ring 22 arranged in spaced opposition in the valve chamber 100. Wherein the first sealing ring 21 is disposed adjacent to the first valve port 101, fixed relative to the valve seat 13, and in sealing contact with the inner end surface of the first joint 11 after the first sealing ring 21 is assembled in place. The second seal ring 22 is disposed adjacent to the second valve port 102, and is a movable member that can move toward or away from (to be described in detail later) the first seal ring 21.

The valve body 30 is formed in a spherical shape as a whole, is positioned between the first seal ring 21 and the second seal ring 22, and is in sealing contact with both. Correspondingly, the contact surfaces of the first seal ring 21 and the second seal ring 22 for sealing engagement with the valve element 30 are both spherical surfaces.

Referring to fig. 3 and 4, the spool 30 has a first transfer flow passage 31 passing therethrough and a second transfer flow passage 32 communicating with the first transfer flow passage 31. The first flow channel 31 and the second flow channel 32 are both linear channels and perpendicular to each other. The two ports of the first overflowing flow channel 31 are a first port 311 and a second port 312.

The second connector 12 has a detent 120 at the inner port, and the spring 40 can be seated in the detent 120 to avoid wobbling or shifting. Specifically, one end of the spring 40 abuts against the bottom of the positioning groove 120 of the second joint 12, and the other end abuts against the second sealing ring 22, and under the elastic force of the spring 40, the assembly formed by the sealing and matching of the valve core 30 and the second sealing ring 22 always has a tendency to move toward the first sealing ring 21.

The valve body 30 of the present embodiment can rotate relative to the seal member (valve body 10) and can move closer to (return to) or farther away from (overcome the elastic force of the spring 40 under the hydraulic pressure) the first seal ring 21.

In the normal position, the first port 311 of the first transfer flow path 31 of the spool 30 faces the first port 101, and the second port 312 faces the second port 102, so that the first transfer flow path 31 communicates the first port 101 and the second port 102. In this state, the two-way communication state is achieved, that is, the port a and the port P/R are in the dual communication state, as shown in fig. 3.

After the valve core 30 rotates 90 °, the first valve port 101 and the second valve port 102 of the present embodiment are in a one-way communication state (not a complete stop state of a conventional ball valve), in which the port of the second transfer flow passage 32 of the valve core 30 is in direct communication with the second valve port 102, wherein when the port a is filled with oil, under the hydraulic action, the assembly formed by the sealing and matching of the valve core 30 and the second sealing ring 22 is separated from the first sealing ring 21 against the elastic force of the spring 40, a transfer port 33 is formed between the valve core 30 and the first sealing ring 21, and the oil can flow out from the port P/R after passing through the transfer port 33, the first transfer flow passage 31 and the second transfer flow passage 32, so as to implement a one-way communication function, which is shown in detail in fig. 4. When the P/R port enters oil, the valve core 30 is in sealing contact with the first sealing ring 21 to realize the stop function, which is shown in detail in fig. 5.

In order to enable the assembly formed by the sealing and matching of the valve core 30 and the second sealing ring 22 to move in the left-right direction, the lower end of the valve rod 50 and the top area of the valve core 30 (the area matched with the lower end of the valve rod 50) are reasonably designed, specifically, the valve rod 50 is vertically and rotatably arranged on the valve body 10, the upper end of the valve rod 50 is exposed out of the top surface of the valve body 10 and is connected with the handle 52, and the lower end of the valve rod 50 extends into the valve cavity 100 and is connected with the valve core 30, so that the valve core 30 can be driven to rotate in the process of rotating the handle 52.

The top of the valve core 30 is provided with a strip-shaped slot 34 corresponding to the lower end of the valve rod 50, and the extension direction of the strip-shaped slot 34 is perpendicular to the length direction of the first overflowing flow channel. The lower end of the valve rod 50 is provided with an insertion part 51 which can extend into the strip-shaped slot 34, and the insertion part 51 is flat and matched with the strip-shaped slot 34, namely the width of the insertion part 51 is basically consistent with the slot width of the strip-shaped slot 34.

In order to define the rotation angle of the valve stem 50, a coil spring 53 is wound around the upper periphery of the valve stem 50. Correspondingly, the top of the valve body 10 also has a positioning pin 54, and the end of the coil spring 53 is connected to the positioning pin 54. When the handle 52 rotates to drive the valve rod 50, the coil spring 53 rotates along with the valve rod 50, and after the handle 52 is reset, the coil spring 53 is automatically wound and reset.

Claims

1. A stroke control valve comprising:

the valve comprises a valve body (10) and a valve body, wherein the valve body is provided with a first valve port (101), a second valve port (102) and a valve cavity (100), and the first valve port (101) and the second valve port (102) are communicated with the valve cavity (100) and are positioned on two opposite sides of the valve cavity (100);

the sealing element is arranged in the valve cavity (100) and comprises a first sealing ring (21) and a second sealing ring (22) which are oppositely arranged at intervals, the first sealing ring (21) is arranged adjacent to the first valve port (101), and the second sealing ring (22) is arranged adjacent to the second valve port (102);

a valve body (30) which is spherical as a whole, is positioned between the first seal ring (21) and the second seal ring (22), and is in sealing contact with the first seal ring and the second seal ring, wherein the valve body (30) has a first flow passage (31) passing therethrough, the valve body (30) is provided in the valve chamber (100) so as to be rotatable relative to the seal, and has at least an open state in which the first valve port (101) and the second valve port (102) are communicated through the first flow passage (31) and a shut-off state in which a flow path between the first valve port (101) and the second valve port (102) is shut off;

the method is characterized in that: a second overflowing flow channel (32) communicated with the first overflowing flow channel (31) is further formed in the valve core (30), the second overflowing flow channel (32) is communicated with the second valve port (102) in the cut-off state, a combined piece formed by sealing and matching the valve core (30) and the second sealing ring (22) is arranged in the valve cavity (100) in a mode of being close to or far away from the first sealing ring (21), an overflowing opening (33) is formed between the valve core (30) and the first sealing ring (21) in a state of being far away from the first sealing ring (21), and the overflowing opening (33) is communicated with the first overflowing flow channel (31);

the stroke control valve further includes:

and the spring (40) is arranged in the valve cavity (100) and acts on the second sealing ring (22), so that the combined piece formed by the sealing fit of the valve core (30) and the second sealing ring (22) always has the tendency of moving towards the first sealing ring (21).

2. The stroke control valve of claim 1, wherein: the first overflowing flow channel (31) and the second overflowing flow channel (32) are linear flow channels and are perpendicular to each other.

3. The stroke control valve of claim 2, wherein: still locate including vertical rotation valve rod (50) on valve body (10), the top of case (30) corresponds to the lower extreme of valve rod (50) has bar slot (34), the extending direction of bar slot (34) with the length direction of first runner that overflows is mutually perpendicular, the lower extreme of valve rod (50) have be the platykurtic, and with bar slot (34) assorted grafting portion (51), grafting portion (51) stretch into in bar slot (34).

4. The stroke control valve of claim 3, wherein: and a handle (52) connected to the upper end of the valve stem (50).

5. The stroke control valve according to any one of claims 1 to 4, wherein: the valve body (10) comprises a valve seat (13), a first connector (11) and a second connector (12), the valve seat (13) is a hollow cylindrical body with openings at the left end and the right end, the first connector (11) and the second connector (12) are respectively connected to the openings at the left end and the right end of the valve seat (13), and the valve cavity (100) is defined together.

6. The stroke control valve of claim 5, wherein: the first joint (11) is inserted into one port of the valve seat (13), and the first sealing ring (21) is in sealing fit with the end face of the first joint (11).

7. The stroke control valve of claim 5, wherein: the second joint (12) has a positioning groove (120) corresponding to the spring (40) for accommodating the spring (40).

8. The stroke control valve of claim 3, wherein: the valve body (10) is characterized by further comprising a coil spring (53) wound on the upper portion of the valve rod (50), the top of the valve body (10) is further provided with a positioning pin (54), one end of the coil spring (53) is connected to the positioning pin (54), and the other end of the coil spring is fixed on the valve rod (50).