CN215110663U - Large-flow three-way valve integrating vacuumizing, vacuum maintaining and vacuum breaking - Google Patents

Abstract

The utility model discloses an integrated large-traffic three-way valve of evacuation, vacuum, broken vacuum, valve body, piston rod and the drive that has the cavity including inside piston rod reciprocating motion's actuating mechanism. The valve body is provided with a working interface, a vacuumizing interface and a vacuum breaking interface, the hollow cavity is divided into a working cavity, a vacuumizing cavity and a vacuum breaking cavity which are not communicated by the piston rod, and the working interface is communicated with the working cavity; when the piston rod is positioned at a left working position, the vacuumizing interface is communicated with the working interface through the working cavity; when the piston rod is located at the middle working position, the vacuumizing interface is communicated with the vacuumizing cavity, and the vacuum breaking interface is communicated with the vacuum breaking cavity; when the piston rod is located at the right working position, the vacuum breaking interface is connected with the working interface through the working cavity. The utility model discloses integrated evacuation, keep vacuum, broken three function in vacuum, simple structure, efficient, maintenance convenience.

Description

Large-flow three-way valve integrating vacuumizing, vacuum maintaining and vacuum breaking

Technical Field

The utility model relates to a valve member design technical field especially relates to an integrated evacuation, keep vacuum, broken vacuum large-traffic three-way valve.

Background

The existing large-flow vacuum fluid control valve lacks the self-sealing function (the working position of the valve is in a state of not being connected with other interfaces or the atmosphere), and can not realize vacuum maintenance; the control valve with self-sealing function has too low flow rate, and the efficiency is too low when the control valve is used for vacuum pumping and vacuum breaking control.

In the existing high-flow vacuum valve with a flow coefficient Cv of more than 7.0, a normally closed N.C. type is taken as an example (as shown in fig. 1), a working position A is connected with an exhaust position R in a normal state, an air source P is connected with the working position A after electrification, the working position A cannot be closed, and a self-sealing function is not provided. And the flow coefficient Cv of the control valve with the self-sealing function is less than 1.0, so that the control valve is too low in vacuum-pumping efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the large-traffic vacuum fluid control valve among the prior art and lack the function of proclaiming oneself, can't realize the technical problem that the vacuum kept, the utility model provides an integrated evacuation, keep vacuum, broken vacuum large-traffic three-way valve solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a large-flow three-way valve integrating vacuumizing, vacuum maintaining and vacuum breaking comprises a valve body, a piston rod and a driving mechanism, wherein the valve body is internally provided with a hollow cavity, the piston rod is positioned in the hollow cavity, and the driving mechanism drives the piston rod to reciprocate.

The valve body is provided with a working interface, a vacuumizing interface and a vacuum breaking interface which are communicated with the outside and the hollow cavity, the hollow cavity is divided into a vacuumizing cavity, a working cavity and a vacuum breaking cavity which are not communicated with each other by the piston rod, and the working interface is communicated with the working cavity; when the piston rod is located at a left working position, the vacuumizing interface is connected with a working interface through the working cavity, and the vacuum breaking interface is communicated with the vacuum breaking cavity; when the piston rod is located at the middle working position, the working interface is communicated with the working cavity to realize the self-sealing function, the vacuumizing interface is communicated with the vacuumizing cavity, and the vacuum breaking interface is communicated with the vacuum breaking cavity; when the piston rod is located at the right working position, the vacuum breaking interface is connected with the working interface through the working cavity, and the vacuumizing interface is communicated with the vacuumizing cavity.

Furthermore, the hollow cavity is internally provided with air source cavities which are positioned at two ends of the piston rod, the two air source cavities are not communicated with the vacuum pumping cavity and the vacuum breaking cavity, and the driving mechanism is an air source interface which is respectively communicated with the outside and the two air source cavities on the valve body.

Furthermore, the piston rod is provided with four check rings, and the hollow cavity is divided into five chambers which are not communicated with each other by the four check rings.

Furthermore, the driving mechanism further comprises a return spring positioned between the two ends of the piston rod and the valve body.

Furthermore, a first sealing ring is arranged between the contact surface of each check ring and the valve body.

Furthermore, the retainer ring and the piston rod are integrally formed, and a sealing groove suitable for accommodating the first sealing ring is formed in the circumferential outer side of the retainer ring.

Furthermore, the valve body comprises a valve body which is axially communicated and a valve cover which is fixed at two ends of the valve body.

Furthermore, a second sealing ring is arranged between the valve body and the contact surface of the valve cover.

Further, the valve cover comprises a cover body, a groove is formed in one axial end of the cover body, a fixing column protruding in the axial direction is arranged in the groove, one end of the reset spring is sleeved on the fixing column, and the other end of the reset spring is sleeved on the piston rod.

Further, the valve cover is fixedly connected with the valve body through bolts.

The utility model has the advantages that:

(1) integrated evacuation, keep vacuum, broken vacuum large-traffic three-way valve, integrated evacuation, keep vacuum, broken vacuum three function, simple structure, efficient, maintenance convenience.

(2) Integrated evacuation, keep vacuum, broken vacuum large-traffic three-way valve, easy operation only can control three operating mode by a tribit five-way solenoid valve.

(3) Integrated evacuation, keep vacuum, broken vacuum large-traffic three-way valve, the both ends of piston rod have reset spring, under the condition that two air source interfaces are not ventilative, the three-way valve can reach the closed condition automatically.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a three-way valve according to the present invention;

FIG. 2 is a front view of an embodiment of the integrated vacuuming, vacuum-holding, vacuum-breaking high flow three-way valve of the present invention;

FIG. 3 is a cross-sectional view taken along the line M-M in FIG. 2 when the vacuum-pumping operation of the present invention is performed;

FIG. 4 is a cross-sectional view taken along line M-M of FIG. 2 when the vacuum-maintaining working condition of the present invention is in the vacuum-maintaining working condition;

fig. 5 is a cross-sectional view taken along the direction M-M in fig. 2 when the vacuum breaking operation is performed according to the present invention;

fig. 6 is a perspective view of the middle valve cover of the present invention.

In the figure, 1, a valve body, 101, a valve body, 102, a valve cover, 1021, a cover body, 1022, a groove, 1023, a fixing column, 2, a hollow cavity, 201, a vacuum pumping cavity, 202, a working cavity, 203, a vacuum breaking cavity, 204, a first air source cavity, 205, a second air source cavity, 3, a piston rod, 4, a working interface, 5, a vacuum pumping interface, 6, a vacuum breaking interface, 7, a first air source interface, 8, a second air source interface, 9, a retainer ring, 10, a return spring, 11, a first sealing ring, 12 and a second sealing ring,

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 2-5, a large flow three-way valve integrating vacuum pumping, vacuum maintaining and vacuum breaking comprises a valve body 1 having a hollow cavity 2 therein, a piston rod 3 located in the hollow cavity 2 and a driving mechanism for driving the piston rod 3 to reciprocate. The valve body 1 is provided with a working interface 4, a vacuumizing interface 5 and a vacuum breaking interface 6 which are communicated with the outside and the hollow cavity 2, the hollow cavity 2 is divided into a vacuumizing cavity 201, a working cavity 202 and a vacuum breaking cavity 203 which are not communicated with each other by the piston rod 3, and the working interface 4 is communicated with the working cavity 202; when the piston rod 3 is located at the left working position, the vacuumizing interface 5 is communicated with the working cavity 202 through the working cavity 202, and the vacuum breaking interface 6 is communicated with the vacuum breaking cavity 203; when the piston rod 3 is positioned at the middle working position, the vacuumizing interface 5 is communicated with the vacuumizing cavity 201, and the vacuum breaking interface 6 is communicated with the vacuum breaking cavity 203; when the piston rod 3 is located at the right working position, the vacuum breaking port 6 is communicated with the working cavity 202 through the working cavity 202, and the vacuum pumping port 5 is communicated with the vacuum pumping cavity 201.

The positions of the working interface 4, the vacuumizing interface 5 and the broken vacuum interface 6 on the valve body 1 are fixed, the piston rod 3 is in a moving state, the positions of the vacuumizing cavity 201, the working cavity 202 and the broken vacuum cavity 203 are changed in the moving process of the piston rod 3, so that the communication position of the vacuumizing interface 5 and the broken vacuum interface 6 is changed, the working cavity 202 circulates working media through the working interface 4, the vacuumizing interface 5 is used for connecting vacuumizing equipment, and the broken vacuum interface 6 is used for connecting an air source.

In the utility model, the vacuum pumping chamber 201, the working chamber 202 and the vacuum breaking chamber 203 are arranged from left to right in sequence, when the piston rod 3 is located at the left side working position (i.e. when the piston rod 3 is deviated to the left side), the utility model is in a vacuum pumping working state, the vacuum pumping interface 5 and the working interface 4 are both communicated with the working chamber 202, and the vacuum pumping operation is carried out on the working chamber 202; when the piston rod 3 is located at the middle working position (i.e. when the piston rod 3 is located at the middle position), the utility model is in the vacuum-maintaining working state, and the working cavity 202 is not communicated with the vacuumizing interface 5 nor the vacuum breaking interface 6; when the piston rod 3 is located the right side work position (that is when the piston rod 3 squints to the right side), the utility model discloses be in broken vacuum operating condition, broken vacuum interface 6 is to working chamber 202 conveying gas, begins broken vacuum.

The reciprocating movement of the piston rod 3 is realized by a drive mechanism, which may be pneumatic or mechanical.

Example one

As shown in fig. 2-5, a large flow three-way valve integrating vacuum pumping, vacuum maintaining and vacuum breaking comprises a valve body 1 having a hollow cavity 2 therein, a piston rod 3 located in the hollow cavity 2 and a driving mechanism for driving the piston rod 3 to reciprocate. The valve body 1 is provided with a working interface 4, a vacuumizing interface 5 and a vacuum breaking interface 6 which are communicated with the outside and the hollow cavity 2, the hollow cavity 2 is divided into a vacuumizing cavity 201, a working cavity 202 and a vacuum breaking cavity 203 which are not communicated with each other by the piston rod 3, and the working interface 4 is communicated with the working cavity 202; the hollow cavity 2 is also internally provided with air source cavities which are positioned at two ends of the piston rod 3, the two air source cavities are not communicated with the vacuum pumping cavity 201 and the vacuum breaking cavity 203, and the driving mechanism is an air source interface which is arranged on the valve body 1 and is respectively communicated with the outside and the two air source cavities. As shown in the figure, the air source interface at the left end is a first air source interface 7, the first air source interface 7 is communicated with the first air source cavity 204, the second air source interface 8 is communicated with the second air source cavity 205, the air source interface at the right end is a second air source interface 8, the first air source interface 7, the vacuumizing interface 5, the working interface 4, the vacuum breaking interface 6 and the second air source interface 8 are sequentially arranged from left to right, and meanwhile, the first air source cavity 204, the vacuumizing cavity 201, the working cavity 202, the vacuum breaking cavity 203 and the second air source cavity 205 are also sequentially arranged from left to right and have symmetrical overall structures. The air supply break-make of each kneck passes through circuit control, consequently the utility model discloses can be called the solenoid valve.

The present embodiment realizes the reciprocating motion of the piston rod 3 by controlling the amount of air in the first air source chamber 204 and the second air source chamber 205, and belongs to the pneumatic driving piston rod 3. When the air in the second air source cavity 205 is more, the piston rod 3 is located at the left working position, and the utility model is in the vacuum-pumping working state (as shown in fig. 3); when the air amount in the first air source cavity 204 is equal to that in the second air source cavity 205, the piston rod 3 is located at the middle working position, and the utility model is in a vacuum working state (as shown in fig. 4); when the air amount in the first air source cavity 204 is large, the piston rod 3 is located at the right working position, and the utility model discloses be in broken vacuum operating condition (as shown in fig. 5).

Preferably, the piston rod 3 is provided with four retaining rings 9, the four retaining rings 9 divide the hollow cavity 2 into five chambers which are not communicated with each other, the five chambers are respectively a first air source chamber 204, a vacuum pumping chamber 201, a working chamber 202, a vacuum breaking chamber 203 and a second air source chamber 205, and as shown in fig. 4, the four retaining rings 9 are axially and symmetrically arranged on the piston rod 3. The retainer ring 9 can be welded and fixed with the piston rod 3 and can also be integrally manufactured and formed with the piston rod 3, so that the retainer ring 9 can be prevented from axially moving on the piston rod 3.

In order to improve the sealing performance, a first sealing ring 11 is arranged between the contact surface of each retainer ring 9 and the valve body 1, and as shown in fig. 4, the circumferential outer side of the retainer ring 9 is provided with a sealing groove adapted to accommodate the first sealing ring 11.

Example two

In the first embodiment, at least one of the first air supply interface 7 and the second air supply interface 8 needs to be kept in a ventilation state, for example, at least the second air supply interface 8 is kept in a ventilation state during the vacuum-pumping working state; in a vacuum-maintaining working state, the two air source interfaces are kept in a ventilation state, so that the piston rod 3 is in a middle balance state; in the vacuum-breaking working state, at least the first air source interface 7 keeps a ventilation state, which can cause great energy waste, and in the vacuum-breaking working state, the two air source cavities continuously ventilate, which can cause the valve body 1 to vibrate and influence the stable flow of fluid. For this reason, the following structure is added to this embodiment:

the driving mechanism further comprises a return spring 10 positioned between two ends of the piston rod 3 and the valve body 1, and at the moment, the electromagnetic valve is in three working states that only the first air source interface 7 is ventilated, only the second air source interface 8 is ventilated, and the first air source interface 7 and the second air source interface 8 are not ventilated. The specific working principle is as follows:

1. when the first air source connector 7 and the second air source connector 8 are not ventilated, the return springs 10 on the two sides press the piston rod 3 to the middle position, and the working connector 4 is in a closed state, as shown in fig. 4.

2. When only the second air source interface 8 is ventilated, the piston rod 3 moves leftwards until the left end of the piston rod 3 contacts the left end of the valve body 1, the vacuumizing interface 5 is communicated with the working interface 4, and vacuumizing is started as shown in fig. 3.

3. After the vacuum pumping is finished, the second air source port 8 is cut off, the piston rod 3 returns to the state shown in fig. 4 under the action of the return spring 10, and the working cavity 202 is in a state of keeping the vacuum pressure in a closed state.

4. The first air source port 7 is ventilated, the piston rod 3 moves rightwards until contacting the right end of the valve body 1, the vacuum breaking port 6 is communicated with the working port 4, as shown in fig. 5, the vacuum breaking port 6 leads atmosphere to the working cavity 202, and vacuum breaking is started.

5. And after the vacuum breaking is finished, the first air source interface 7 is cut off, and the piston rod 3 returns to the state shown in fig. 4.

In order to facilitate the disassembly and assembly, the valve body 1 adopts a split structure, specifically, the valve body 1 comprises a valve body 101 which is axially communicated and a valve cover 102 which is fixed at two ends of the valve body 101, and the valve cover 102 is fixedly connected with the valve body 101 through bolts. Further, a second seal ring 12 is provided between the contact surfaces of the valve body 101 and the valve cover 102.

In order to avoid the bending displacement of the return spring 10, as shown in fig. 4 and 6, preferably, the valve cover 102 includes a cover 1021, one axial end of the cover 1021 has a groove 1022, an axially protruding fixing pillar 1023 is arranged in the groove 1022, one end of the return spring 10 is sleeved on the fixing pillar 1023, and the other end of the return spring 10 is sleeved on the piston rod 3.

In the description of the present invention, it is to be understood that the terms "center", "left", "right", "inner", "outer", "axial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. The utility model provides an integrated large-traffic three-way valve of evacuation, keep vacuum, broken vacuum which characterized in that: the valve comprises a valve body (1) with a hollow cavity (2) inside, a piston rod (3) positioned in the hollow cavity (2) and a driving mechanism for driving the piston rod (3) to reciprocate;

the valve body (1) is provided with a working interface (4), a vacuumizing interface (5) and a vacuum breaking interface (6) which are communicated with the outside and the hollow cavity (2), the hollow cavity (2) is divided into a vacuumizing cavity (201), a working cavity (202) and a vacuum breaking cavity (203) which are not communicated with each other by the piston rod (3), and the working interface (4) is communicated with the working cavity (202); when the piston rod (3) is located at a left working position, the vacuumizing interface (5) is connected with the working interface (4) through the working cavity (202), and the vacuum breaking interface (6) is communicated with the vacuum breaking cavity (203); when the piston rod (3) is located at the middle working position, the vacuumizing interface (5) is communicated with the vacuumizing cavity (201), and the vacuum breaking interface (6) is communicated with the vacuum breaking cavity (203); when the piston rod (3) is located at the right side working position, the vacuum breaking interface (6) is connected with the working interface (4) through the working cavity (202), and the vacuumizing interface (5) is communicated with the vacuumizing cavity (201).

2. The integrated vacuum pumping, vacuum maintaining and vacuum breaking high flow three-way valve according to claim 1, characterized in that: the vacuum pump is characterized in that air source cavities at two ends of the piston rod (3) are further arranged in the hollow cavity (2), the two air source cavities are not communicated with the vacuum pumping cavity (201) and the broken vacuum cavity (203), and the driving mechanism is an air source interface which is formed in the valve body (1) and is respectively communicated with the outside and the two air source cavities.

3. The integrated vacuum pumping, vacuum maintaining and vacuum breaking high flow three-way valve according to claim 2, characterized in that: the piston rod (3) is provided with four check rings (9), and the hollow cavity (2) is divided into five chambers which are not communicated with each other by the four check rings (9).

4. The integrated vacuum pumping, vacuum maintaining and vacuum breaking high flow three-way valve according to claim 2, characterized in that: the driving mechanism further comprises a return spring (10) positioned between two ends of the piston rod (3) and the valve body (1).

5. The integrated vacuum pumping, vacuum maintaining and vacuum breaking high flow three-way valve according to claim 3, characterized in that: and a first sealing ring (11) is arranged between the contact surfaces of the check rings (9) and the valve body (1).

6. The integrated vacuum pumping, vacuum maintaining and vacuum breaking high flow three-way valve according to claim 5, characterized in that: the check ring (9) and the piston rod (3) are integrally formed, and a sealing groove suitable for containing the first sealing ring (11) is formed in the circumferential outer side of the check ring (9).

7. The integrated vacuum pumping, vacuum maintaining and vacuum breaking high flow three-way valve according to claim 4, characterized in that: the valve body (1) comprises a valve body (101) which is axially communicated and valve covers (102) which are fixed at two ends of the valve body (101).

8. The integrated vacuum pumping, vacuum maintaining, vacuum breaking, high flow three-way valve of claim 7, wherein: and a second sealing ring (12) is arranged between the contact surfaces of the valve body (101) and the valve cover (102).

9. The integrated vacuum pumping, vacuum maintaining, vacuum breaking, high flow three-way valve of claim 7, wherein: the valve cover (102) comprises a cover body (1021), a groove (1022) is formed in one axial end of the cover body (1021), a fixing column (1023) protruding in the axial direction is arranged in the groove (1022), one end of the reset spring (10) is sleeved on the fixing column (1023), and the other end of the reset spring (10) is sleeved on the piston rod (3).

10. The integrated vacuum pumping, vacuum maintaining, vacuum breaking, high flow three-way valve of claim 9, wherein: the valve cover (102) is fixedly connected with the valve body (101) through bolts.

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