CN112855989A - Multi-way valve with eccentric structure - Google Patents

Abstract

A multi-way valve with an eccentric structure comprises a valve core and a middle partition component, wherein the middle partition component is provided with a middle partition plate, a flow dividing partition plate, an upper baffle plate and a lower baffle plate, an opening area of the middle partition plate is an arc-shaped surface, and the arc-shaped surface of the middle partition plate is attached and sealed with the arc-shaped surface of the inner wall of a valve body; the flow dividing partition plate is positioned on the back of the opening of the middle partition plate, and the flow dividing partition plate seals or conducts the channel on the valve body; the upper baffle is positioned at the upper ends of the middle partition and the flow dividing partition, the lower baffle is positioned at the lower ends of the middle partition and the flow dividing partition, and the upper baffle is attached and sealed with the inner wall of the valve body at the periphery of the outer edge of the opening area of the middle partition; the lower baffle plate is attached and sealed with the inner wall of the valve body at the periphery of the outer edge of the opening position of the middle clapboard; the lower baffle plate is provided with a first through hole which is communicated with the cavity in the middle of the middle clapboard; the baffle is equipped with down and goes out the axle down, goes out the axle centre down and is equipped with the second through-hole, and first through-hole and second through-hole communicate with each other. The invention greatly reduces the internal leakage amount, reduces the fluid resistance and enhances the reliability of the valve in operation under the pressure difference and the temperature difference.

Description

Multi-way valve with eccentric structure

Technical Field

The invention belongs to the technical field of valves, and particularly relates to an eccentric structure multi-way valve.

Background

At present, in the field of electric valves for air conditioners, in the operation process of an air conditioner, a high-temperature high-pressure gas is arranged at an exhaust end, a low-temperature low-pressure gas is arranged at an air suction end, and a medium flowing into and flowing out of a valve has temperature difference and pressure difference, so that a valve body generates pressure deformation and thermal deformation, the valve stability ratio of a rotary structure is poor, and the leakage amount is large.

In the field of heat recovery of air-conditioning heat pumps, two four-way valves are needed to work, the cost is increased, the energy efficiency is reduced, and besides, the resistance of the existing product fluid is large and the energy consumption is high. And if the maintenance is generated, the reverse Freon maintenance is required, which causes gas greenhouse effect and environmental pollution. A new multi-way valve technical scheme is needed, and the inventor develops a series of technical schemes for the new multi-way valve technical scheme.

Disclosure of Invention

Therefore, the invention provides the multi-way valve with the eccentric structure, which solves the problem of poor reliability of the valve in operation under the pressure difference and the temperature difference and solves the problem of maintenance pollution.

In order to achieve the above purpose, the invention provides the following technical scheme: the multi-way valve with the eccentric structure comprises a valve body, wherein the upper end of the valve body is connected with an upper cover body, the lower end of the valve body is connected with a lower cover body, the side wall of the valve body is at least provided with two channels, and a valve core is arranged inside the valve body;

the valve core comprises a middle partition assembly, the middle partition assembly is provided with a middle partition plate, a flow dividing partition plate, an upper baffle plate and a lower baffle plate, an opening area of the middle partition plate is an arc-shaped surface, the arc-shaped surface of the middle partition plate is in fit sealing with the arc-shaped surface of the inner wall of the valve body, and one of a flat plate surface, a spherical surface, a fluid curved surface or a pipeline elbow shape is arranged inside the middle partition plate; the flow dividing partition plate is positioned on the back of the opening of the middle partition plate, and the flow dividing partition plate seals or conducts a channel on the valve body;

the upper baffle is positioned at the upper ends of the middle partition and the flow dividing partition, the lower baffle is positioned at the lower ends of the middle partition and the flow dividing partition, and the upper baffle is attached and sealed with the inner wall of the valve body at the periphery of the outer edge of the opening area of the middle partition; the lower baffle is attached and sealed with the inner wall of the valve body at the periphery of the outer edge of the opening position of the middle clapboard;

the lower baffle plate is provided with a first through hole which is communicated with a cavity in the middle of the middle partition plate; the baffle is equipped with down and goes out the axle down, is equipped with the second through-hole in the middle of going out the axle down, first through-hole and second through-hole communicate with each other.

As a preferred scheme of the multi-way valve with the eccentric structure, an upper output shaft is arranged at the upper part of the upper baffle, and preset side pushing pieces are arranged in the radial directions of the upper output shaft and the lower output shaft;

the preset side pushing piece enables the geometric circle center of the valve core and the rotating circle center of the valve core to be eccentric, and pushes the middle partition component to be attached to or separated from the inner wall of the valve body.

As a preferred scheme of the multi-way valve with the eccentric structure, the upper output shaft is provided with an upper bearing, the lower output shaft is provided with a lower bearing, and the upper bearing and the lower bearing are both positioned at the outer side of the preset side pushing piece;

an upper bearing cover is arranged on the outer side of the upper bearing, and the outer wall of the upper bearing cover is matched with the inner wall of the valve body; the outer side of the lower bearing is provided with a lower bearing cover, and the outer wall of the lower bearing cover is matched with the inner wall of the valve body.

As a preferred scheme of the multi-way valve with the eccentric structure, a driving assembly is arranged above the upper bearing cover, and a power shaft of the driving assembly is connected with the upper output shaft;

a power supporting plate is arranged inside the valve body, and a driving assembly is fixed on the power supporting plate or directly fixed on the upper bearing cover; the drive assembly is provided with a lead-out wire, the upper cover body is connected with a terminal board, the terminal board is connected with a binding post, and the lower part of the binding post is connected with the lead-out wire of the drive assembly.

As a preferred scheme of the multi-way valve with the eccentric structure, the lower output shaft is led out through a middle hole of the lower bearing cover, a sensor plate is arranged at the lower part of the lower output shaft, and the sensor plate is provided with a magnetic block;

the lower cover body is provided with a sensor blind hole, a sensor is arranged in the sensor blind hole, the sensor and the magnetic block are distributed on the same circumference, and the magnetic block rotates along with the valve core to be sensed by the sensor periodically or at intervals.

As a preferred scheme of the multi-way valve with the eccentric structure, maintenance sealing pieces are arranged at the matching positions of the upper output shaft and the upper bearing cover and the matching positions of the lower output shaft and the lower bearing cover; a terminal plate sealing element is arranged between the terminal plate and the upper cover body;

matching sealing pieces are arranged on the matching surface positions of the upper surface of the valve body and the upper cover body and the matching surface positions of the valve body and the lower cover body;

a movable stop block is arranged at the lower part of the lower output shaft, and a fixed limit stop block is arranged on the lower cover body or the lower bearing cover; the movable stop block is limited and stopped by the fixed limit stop block in the process of rotating along with the valve core;

and a sight glass is arranged at the middle position of the lower cover body or on the side wall of the valve body.

As a preferable scheme of the multi-way valve with the eccentric structure, the upper bearing and the lower bearing are both tapered rollers or tapered sliding bearings, a spring is arranged at any position of the lower part of the lower bearing cover, the upper part of the upper bearing cover, the inner ring of the tapered roller bearing or the outer ring of the tapered roller bearing, and the spring is a disc spring, a wave spring or a pressure spring.

As a preferred scheme of the multi-way valve with the eccentric structure, the middle partition plate is U-shaped, at least one channel J is arranged at the position of the upper output shaft or the lower output shaft, and the channel J is communicated with a hollow cavity of the U-shaped middle partition plate of the valve core;

the lower bearing cover or the upper bearing cover is provided with an anti-rotation pin, one end of the anti-rotation pin is connected with the lower bearing cover or the upper bearing cover, and the other end of the anti-rotation pin is connected with the valve body or the power supporting plate;

the lower bearing cover or the upper bearing cover is at least provided with a hole channel L, the channel L is communicated with the semicircular defect part of the valve core, the output shaft of the driving assembly is provided with a rotating plate, the rotating plate is provided with a valve head, the valve head is provided with a pre-pressing spring, and the valve head is driven by the rotating plate to open and close the hole channel L.

As a preferred scheme of the multi-way valve with the eccentric structure, at least one control channel K is arranged on the lower part of the lower bearing cover, the upper part of the upper bearing cover or the side wall of the valve body, the control channel K is connected with a control valve, the control valve adopts one of an electromagnetic valve, a four-way valve, a three-way valve, a ball valve or a gate valve, and the control valve is connected with a high-pressure source or a low-pressure source.

As a preferred scheme of the multi-way valve with the eccentric structure, the driving assembly comprises a motor and a speed reducer, the speed reducer is any one of a planetary speed reducer, a worm gear speed reducer, a hard tooth surface speed reducer, a harmonic speed reducer and a cycloidal speed reducer, and the motor is any one of a direct current motor, an alternating current motor, a permanent magnet motor, a shield motor, a stepping motor, a servo motor and a magnetic coupling.

As a preferred scheme of the multi-way valve with the eccentric structure, the sensor is a magnetic sensor, a photoelectric sensor or a mechanical switch, the sensor is arranged in the middle of the valve body or on the side wall of the valve body, the number of the sensors is at least one, and the number of the magnetic blocks corresponding to the sensors is at least one.

In a preferred embodiment of the eccentric structure multi-way valve, a terminal protection cover is provided outside the terminal plate, a hole is provided in a side surface of the terminal protection cover, and a lead of the terminal plate is led out to a junction box provided at a side portion of the upper cover body through the terminal plate side hole.

As a preferred scheme of the multi-way valve with the eccentric structure, a sensor protective cover is arranged outside the sensor, a hole is formed in the side face of the sensor protective cover, and a lead of the sensor is led out to a junction box arranged on the side part of the upper cover body through a side hole of the sensor protective cover;

or the terminal board is arranged at the side part of the valve body, and the sensor is arranged at the middle part or the side wall in the valve body.

As the preferred scheme of the multi-way valve with the eccentric structure, a wear-resistant sealing piece is arranged at the matching position, close to the valve core, on the outer wall of the valve core or the inner wall of the valve body, and the wear-resistant sealing piece is made of composite materials, alloys or polytetrafluoroethylene high polymer materials;

the wear-resistant sealing element is a copper sleeve, and the copper sleeve is provided with a hole embedded with a lubricating material; the wear-resistant sealing element is assembled in a mode of embedding, casting, welding or spraying.

The side wall of the valve body is at least provided with two channels, and a valve core is arranged in the valve body; the valve core comprises an intermediate partition assembly, the intermediate partition assembly is provided with a middle partition plate, a flow dividing partition plate, an upper baffle plate and a lower baffle plate, an opening area of the middle partition plate is an arc-shaped surface, the arc-shaped surface of the middle partition plate is in fit sealing with the arc-shaped surface of the inner wall of the valve body, and the inside of the middle partition plate is one of a flat plate surface, a spherical surface, a fluid curved surface or a pipeline elbow shape; the flow dividing partition plate is positioned on the back of the opening of the middle partition plate, and the flow dividing partition plate seals or conducts the channel on the valve body; the upper baffle is positioned at the upper ends of the middle partition and the flow dividing partition, the lower baffle is positioned at the lower ends of the middle partition and the flow dividing partition, and the upper baffle is attached and sealed with the inner wall of the valve body at the periphery of the outer edge of the opening area of the middle partition; the lower baffle plate is attached and sealed with the inner wall of the valve body at the periphery of the outer edge of the opening position of the middle clapboard; the lower baffle plate is provided with a first through hole which is communicated with the cavity in the middle of the middle clapboard; the baffle is equipped with down and goes out the axle down, goes out the axle centre down and is equipped with the second through-hole, and first through-hole and second through-hole communicate with each other. The valve core pre-biased sealing device is provided with the pre-arranged side pushing piece, the pre-arranged side pushing piece can pre-bias and seal the valve core, the shape of the valve core is changed, the maintenance sealing piece is added, the internal leakage amount is greatly reduced, the fluid resistance is reduced, the running reliability of the valve under the pressure difference and the temperature difference is enhanced, after the maintenance sealing piece is added, the valve can be overhauled under pressure, the emission and the pollution are reduced, and the vacuumizing operation of the system is not influenced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic structural view of an eccentric structure multi-way valve provided in embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a valve core of the eccentric structure multi-way valve provided in embodiment 1 of the invention;

FIG. 3 is a schematic cross-sectional view of a pre-eccentric configuration multi-way valve cartridge provided in embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of a pre-eccentric structure multi-way valve sensor and a channel principle provided in embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of a pre-eccentric structure multi-way valve provided in embodiment 2 of the present invention;

FIG. 6 is a schematic diagram showing a structure of a pre-eccentric structure multi-way valve channel provided in embodiment 2 of the present invention;

FIG. 7 is a schematic view of a multi-way valve with a pre-eccentric configuration provided in embodiment 3 of the present invention;

FIG. 8 is a schematic cross-sectional view of a pre-eccentric configuration multi-way valve cartridge provided in embodiment 3 of the present invention;

FIG. 9 is a structural view of a multi-way valve with a pre-eccentric structure provided in embodiment 4 of the present invention;

FIG. 10 is a schematic diagram of the pre-eccentric configuration multi-way valve passages provided in example 4 of the present invention;

FIG. 11 is a structural view of a multi-way valve with a pre-eccentric structure provided in embodiment 5 of the present invention;

FIG. 12 is a schematic view of the structure of the pre-eccentric multi-ported valve driving pin and the rotating plate provided in embodiment 5 of the present invention;

FIG. 13 is a schematic structural view of a pre-eccentric multi-way valve provided in embodiment 6 of the present invention;

fig. 14 is a schematic diagram of a channel structure of a multi-way valve with a pre-eccentric structure provided in embodiment 6 of the invention.

In the figure, 1, a valve body; 2. an upper cover body; 3. a lower cover body; 4. a valve core; 5. a septum assembly; 6. a middle partition plate; 7. a flow dividing partition plate; 8. an upper baffle plate; 9. a lower baffle plate; 10. a first port; 11. a lower shaft is output; 12. a second port; 13. upward shaft output; 14. presetting a side pushing piece; 15. an upper bearing; 16. a lower bearing; 17. an upper bearing cap; 18. a lower bearing cap; 19. a drive assembly; 20. a power support plate; 21. a terminal plate; 22. a binding post; 23. a sensor board; 24. a magnetic block; 25. repairing the sealing element; 26. a terminal plate seal; 27. a mating seal; 28. a movable stop block; 29. fixing a limit stop block; 30. a sight glass; 31. pre-pressing a spring; 32. a rotating plate; 33. a valve head; 34. an anti-rotation pin; 35. and driving the pin shaft.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, 2 and 3, embodiment 1 of the present invention provides a pre-biased structure four-way valve, including a valve body 1, an upper cover 2 is connected to an upper end of the valve body 1, a lower cover 3 is connected to a lower end of the valve body 1, at least two channels are provided on a side wall of the valve body 1, and a valve core 4 is provided inside the valve body 1;

the valve core 4 comprises an intermediate partition assembly 5, the intermediate partition assembly 5 is provided with an intermediate partition plate 6, a flow dividing partition plate 7, an upper partition plate 8 and a lower partition plate 9, an opening area of the intermediate partition plate 6 is an arc-shaped surface, the arc-shaped surface of the intermediate partition plate 6 is in fit sealing with the arc-shaped surface of the inner wall of the valve body 1, and the inside of the intermediate partition plate 6 is one of a flat plate surface, a spherical surface, a fluid curved surface or a pipeline elbow shape; the flow dividing partition plate 7 is positioned on the back of the opening of the middle partition plate 6, and the flow dividing partition plate 7 closes or conducts the channel on the valve body 1;

the upper baffle 8 is positioned at the upper ends of the middle partition plate 6 and the flow dividing partition plate 7, the lower baffle 9 is positioned at the lower ends of the middle partition plate 6 and the flow dividing partition plate 7, and the upper baffle 8 is attached and sealed with the inner wall of the valve body 1 at the periphery of the outer edge of the opening area of the middle partition plate 6; the lower baffle 9 is attached and sealed with the inner wall of the valve body 1 at the periphery of the outer edge of the opening position of the middle clapboard 6;

the lower baffle 9 is provided with a first through hole 10, and the first through hole 10 is communicated with a cavity in the middle of the middle clapboard 6; the lower baffle 9 is provided with a lower shaft 11, a second through hole 12 is formed in the middle of the lower shaft 11, and the first through hole 10 is communicated with the second through hole 12.

Specifically, the middle partition plate 6 is U-shaped, the opening of the middle partition plate 6 corresponds to the channel on the side wall of the valve body 1, and the opening of the U-shaped middle partition plate 6 is an arc-shaped surface and is attached to and sealed with the arc-shaped surface of the inner wall of the valve body 1. The interior of the middle clapboard 6 can be a flat surface, a spherical surface, a fluid curved surface shape or a pipeline elbow shape, the back of the opening of the middle clapboard 6 is provided with a flow dividing clapboard 7, and the flow dividing clapboard 7 seals a certain channel on the valve body 1, or the channels are communicated in pairs or are communicated completely. The opening of the U-shaped middle partition plate 6 points to one channel, and other channels are closed or communicated under the action of the flow dividing partition plate 7.

Specifically, the top board 8 and the lower board 9 are the non-complete circle structure (can be the combination of little semicircle structure or two kinds of above semicircles), the top board 8 and the lower board 9 are laminated mutually and are sealed with 1 inner wall of valve body in 6 opening position outer fringe circumferences of baffle 6 in the U-shaped, the lower board 9 has first opening 10, the cavity in the middle of the baffle 6 in first opening 10 and the U-shaped communicates with each other, there is lower play axle 11 down under the lower board 9, there is second opening 12 in the middle of lower play axle 11, first opening 10 is the same with second opening 12, first opening 10 and the arbitrary setting as required of second opening 12 shape.

In this embodiment, an upper output shaft 13 is arranged at the upper part of the upper baffle 8, and a preset side pushing piece 14 is arranged in the radial direction of the upper output shaft 13 and the lower output shaft 11; the preset side pushing piece 14 enables the geometric circle center of the valve core 4 and the rotating circle center of the valve core 4 to be eccentric, and the preset side pushing piece 14 pushes the middle partition component 5 to be attached to or separated from the inner wall of the valve body 1. The upper output shaft 13 is provided with an upper bearing 15, the lower output shaft 11 is provided with a lower bearing 16, and the upper bearing 15 and the lower bearing 16 are both positioned at the outer side of the preset side pushing piece 14; an upper bearing cover 17 is arranged on the outer side of the upper bearing 15, and the outer wall of the upper bearing cover 17 is matched with the inner wall of the valve body 1; and a lower bearing cover 18 is arranged on the outer side of the lower bearing 16, and the outer wall of the lower bearing cover 18 is matched with the inner wall of the valve body 1.

Specifically, the preset side pushing piece 14 may have elasticity or no elasticity, and is combined with other components to form an elastic piece, and the pushing direction of the preset side pushing piece 14 is the U-shaped opening direction of the middle partition plate 6 or the reverse direction thereof, so that the opening of the U-shaped middle partition plate 6, the upper partition plate 8 and the lower partition plate 9 are attached to the inner wall of the valve body 1 or separated from the inner wall of the valve body 1.

In this embodiment, a driving assembly 19 is arranged on the upper output shaft 13 of the valve core 4, the driving assembly 19 is composed of a motor and a speed reducer, the motor is provided with a braking or damping mechanism and an overload protector, under the action of the preset side pushing piece 14, the circle centers of the upper bearing 15 and the lower bearing 16 are not concentric with the arc-shaped circle center of the middle U-shaped middle partition plate 6, and the eccentric position is in a direction of deviating to the opening. The upper bearing 15 and the lower bearing 16 may be rolling bearings, sliding bearings, or dry friction bearings.

Specifically, an output shaft of the driving assembly 19 is connected with an upper output shaft 13 of the valve core 4, a power support plate 20 is arranged in the middle of the valve body 1, the driving assembly 19 is fixed on the power support plate 20, the driving assembly 19 is provided with an outgoing line, the upper cover body 2 is provided with a hole, a terminal plate 21 is arranged in the hole, the terminal plate 21 is provided with a terminal post 22, and the lower part of the terminal post 22 is connected with the outgoing line of the driving assembly 19. The drive assembly may be one of pneumatically or hydraulically or electrically driven.

Referring to fig. 4, in this embodiment, a channel a is provided in the middle of the lower cover 3, the channel a communicates with the second opening 12 of the lower output shaft 11, and a disc spring is provided between the lower cover 3 and the lower bearing cover 18. The lower output shaft 11 of the valve core 4 is led out through the lower bearing cover 18 and is provided with a sensor plate, the sensor plate is provided with a magnetic block 24, the lower cover body 3 is provided with a blind hole at the position of the magnetic block 24, magnetic sensors are arranged in the blind hole, the number of the sensors is four, the sensors correspond to each pipeline, namely a sensor B1 corresponds to a pipe B, a sensor C1 corresponds to a pipe C, a sensor D1 corresponds to a pipe D, a sensor E1 corresponds to a pipe E, and a sensor protective cover is arranged outside the magnetic sensors.

In the embodiment, a maintenance sealing piece 25 is arranged at the matching position of the upper output shaft 13 and the upper bearing cover 17 of the valve core 4, and during maintenance, the pressure is pressed so as not to extract fluorine for maintenance, thereby reducing the emission and greenhouse gas effect. The outer wall of the valve core 4 is provided with a wear-resistant copper sleeve, and wear-resistant lubricating materials such as graphite are embedded in holes of the wear-resistant copper sleeve. Further, a seal may be provided between the upper bearing cover 17 and the valve body 1, or between the lower bearing cover 18 and the valve body 1.

In the present embodiment, a terminal plate seal 26 is provided between the terminal plate 21 and the upper cover 2, and a fitting seal 27 is provided between the upper cover 2 and the valve body 1 and between the lower cover 3 and the valve body 1. At least one seal is provided between the lower portion of the lower bearing cap 18 and the lower output shaft 11.

When the multi-way valve works, the initial state, the channel AB is communicated, the channel D is blocked, the channel C, E is communicated, the B1 sensor group has signals at the moment, other sensor groups do not have signals, when the AC is required to be converted to be communicated, because the C1 sensor does not receive signals in place, an external control circuit supplies power to the driving unit, the driving assembly 19 drives the valve core 4 to rotate, the valve core 4 drives the sensor plate 23 to move, the magnet on the sensor plate 23 also rotates along with the sensor, when the magnetic block 24 is opposite to the sensor C1, the C1 sensor transmits signals to the control system, after the control system obtains the signals, the power supply to the driving assembly 19 is stopped, the valve core 4 stops rotating, the AC is communicated at the moment, the BD is communicated, and the port E.

If another AD communication state is needed, the D1 sensor does not obtain a signal, the driving circuit supplies power to the driving assembly 19, the driving assembly 19 rotates until the valve core 4 is in the AD communication state, the D1 sensor group corresponds to the magnetic block 24, a D1 in-place signal is generated, and the driving circuit stops the driving assembly 19 from rotating. At this time, AD was turned on, EC was turned on, and B was blocked.

In this embodiment, an electric brake or damping mechanism may be added to the drive assembly 19 with an overcurrent protector in order to prevent rotational inertia of the drive assembly 19. The position sensor can be one, or a plurality of sensors can jointly form a sensor group, so that more accurate positioning is facilitated.

In this embodiment, under the pushing action of the preset side pushing member 14, the rotation center of the valve core 4 is not concentric with the center of the sealing surface of the valve core 4, the disc spring pushes the lower bearing cover 18 upwards, the lower bearing cover 18 pushes the outer ring of the tapered roller bearing to act upwards, the outer ring of the tapered roller bearing acts on the inner ring of the bearing through the roller pin, so that the inner ring of the bearing exerts force in the direction of the center of the circle and acts on the upper output shaft 13 and the lower output shaft 11 of the valve core 4, the upper output shaft 13 and the lower output shaft 11 of the valve core 4 generate lateral thrust, even if the baffle part of the valve core 4 is worn away from the U-shaped middle partition part, the baffle part can be tightly combined.

Example 2

Referring to fig. 5 and 6, embodiment 2 of the present invention provides a four-way valve having a pre-biased structure, which is different from embodiment 1 in that a disc spring is disposed between an outer race of an upper bearing 15 and an upper bearing cover 17 in embodiment 2. The upper output shaft 13 is provided with a movable stop 28, the upper bearing cover 17 is provided with a fixed limit stop 29, and the upper output shaft 13 of the valve core 4 drives the movable stop 28 to rotate and can be limited by the fixed limit stop 29.

In this embodiment, the outer wall of the valve core 4 is provided with a wear-resistant sealing material, namely polytetrafluoroethylene. The friction resistance of the valve core 4 in the motion process is increased, and the service life of the valve core 4 is effectively prolonged.

With the aid of fig. 6, in the present exemplary embodiment, the flow dividing partition 7 of the valve element 4 blocks the channel C, and the channel DE communicates with each other. The internal flow channels of the flow dividing partition plate 7 and the U-shaped middle partition plate 6 are in a fluid shape, so that the reduction of fluid resistance is facilitated.

The operation principle of the four-way valve of the pre-biased structure of the embodiment 2 is the same as that of the embodiment 1.

Example 3

Referring to fig. 7 and 8, embodiment 3 of the present invention provides a four-way valve having a pre-biased structure, which is different from embodiments 1 and 2 in that only three passages are opened in the sidewall of the valve body 1, and the flow dividing partition 7 of the partition assembly 5 of the valve core 4 is omitted. In addition, the upper part of the upper bearing cover 17 is provided with a channel K, and the channel K is provided with a control valve, wherein the control valve is one of a solenoid valve, a four-way valve, a three-way valve, a ball valve or a gate valve, and the control valve is connected with a high-pressure source or a low-pressure source. A disc spring is arranged between the inner ring of the upper bearing 15 and the upper bearing cover 17.

Further, in order to control the force pressing on the tapered roller bearing, a diameter reducing sleeve is added between the upper bearing cap 17 and the inner wall of the valve body 1.

Example 4

Referring to fig. 9 and 10, in embodiment 4 of the present invention, a four-way valve with a pre-biased structure is provided, in which four channels BCDE are opened on the side wall of a valve body 1, and a flow dividing partition 7 of a partition assembly 5 in a valve core 4 blocks a pipeline on the opened upper side of a U-shaped middle partition 6, that is, when a channel AB is opened, a channel E is blocked, and a channel CD is opened.

In this embodiment, a hole is formed in the side wall of the upper cover 2 or the side wall of the valve body 1, the terminal plate 21 is mounted at the hole, and the terminal box is provided at the middle position of the terminal plate 21, that is, the middle position of the valve body 1.

In this embodiment, the sensor is disposed in the middle of the valve body 1, the sensor may be a mechanical switch, and the number of the sensors may be one or more.

In this embodiment, a wear-resistant sealing material is provided inside the valve body 1 at a position close to the valve element 4.

In this embodiment, the mechanical stopper is provided at the lower part of the valve body 1, and the sight glass 30 is provided at the lower cover 3.

Example 5

Referring to fig. 11 and 12, in embodiment 5 of the present invention, there is provided a four-way valve with a pre-biased structure, the side wall of the valve body 1 is provided with four channels BCDE, the flow dividing partition 7 of the partition assembly 5 in the valve core 4 is not blocked, and the rest channels are in a full-pass state.

In this embodiment, a channel J is opened between the valve core 4 and the upper output shaft 13, the channel J is communicated with the hollow part of the U-shaped middle partition plate 6, a channel L is arranged on the upper bearing cover 17, the channel L is communicated with the back surface of the U-shaped middle partition plate 6 of the valve core 4, a valve head 33 is arranged at a position corresponding to the channel L, a rotating plate 32 is arranged on the upper output shaft 13 of the valve core 4, the valve head 33 is arranged on the rotating plate 32, a pre-pressure spring 31 is arranged between the rotating plate 32 and the valve head 33, the pre-pressure spring 31 is pressed on the valve head 33, the rotating plate 32 is connected with the output shaft of the driving assembly 19, and the valve head 33 and.

In this embodiment, the center of the upper output shaft 13 of the valve core 4 is provided with a hole, the end surface between the middle hole and the upper output shaft 13 is provided with at least one driving pin shaft 35, the driving assembly 19 drives the rotating plate 32 to rotate first, and opens the communication between the valve head 33 and the channel L, and then drives the valve core 4 to rotate forward and backward when touching the driving pin shaft 35.

In this embodiment, a bearing and a seal are provided between the upper bearing cover 17 and the valve body 1, and can move up and down. The upper bearing cap 17 is further provided with an anti-rotation pin 34, and the anti-rotation pin 34 is connected to the power support plate 20 or to the valve body 1 to prevent the upper bearing cap 17 from rotating.

It will be readily appreciated by those skilled in the art that the rotating plate 32 may also be configured to function as the movable stop 28 and perform a mechanical stop.

It will be readily appreciated by those skilled in the art that the drive assembly 19 can open the valve head 33 and the passage L, rotate the valve element 4 after a number of circumferential divisions, and then close the valve head 33 and the passage L.

Example 6

With reference to fig. 13 and 14, in embodiment 6 of the present invention, a four-way valve with a pre-biased structure is provided, a sidewall of a valve body 1 is provided with six channels BCDEFG, a U-shaped middle partition 6 is changed into a C-shape, channels on two sides of the C-shaped middle partition 6 are blocked by a shunt partition 7 of a valve core 4, and the conduction conditions of the channels are as follows: AB is connected, GC is blocked, CDE is connected, and the rest channels are in a full-pass state.

In this embodiment, the preset side pushing member 14 is installed at the opening direction position of the C-shaped middle partition plate 6, and at this time, the port a is connected with the low pressure port of the air conditioner.

Based on this embodiment, it is easy to think that the upper bearing 15 and the lower bearing 16 are deep groove ball bearings, and the preset side push 14 itself is elastic.

Example 7

The embodiment 7 of the present invention is different from the other embodiments in that the upper baffle and the lower baffle are directly used as the bearing inner ring, the valve body is used as the bearing outer ring, and the preset side pushing member is directly mounted on the upper baffle and the lower baffle.

It is also easy for those skilled in the art to think that the driving connection of the driving shaft and the valve core can be realized by adopting an internal and external thread connection or a multi-stage multi-thread connection, so that the inner ring and the outer ring of the conical bearing can be pressed or separated conveniently.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A multi-way valve with an eccentric structure comprises a valve body (1), wherein the upper end of the valve body (1) is connected with an upper cover body (2), and the lower end of the valve body (1) is connected with a lower cover body (3), and is characterized in that the side wall of the valve body (1) is at least provided with two channels, and a valve core (4) is arranged inside the valve body (1);

the valve core (4) comprises an intermediate partition assembly (5), the intermediate partition assembly (5) is provided with a middle partition plate (6), a flow dividing partition plate (7), an upper baffle plate (8) and a lower baffle plate (9), an opening area of the middle partition plate (6) is an arc-shaped surface, the arc-shaped surface of the middle partition plate (6) is in fit sealing with the arc-shaped surface of the inner wall of the valve body (1), and one of a flat plate surface, a spherical surface, a fluid curved surface or a pipeline elbow shape is arranged inside the middle partition plate (6); the flow dividing partition plate (7) is positioned on the back of the opening of the middle partition plate (6), and the flow dividing partition plate (7) closes or conducts a channel on the valve body (1);

the upper baffle (8) is positioned at the upper ends of the middle partition (6) and the flow dividing partition (7), the lower baffle (9) is positioned at the lower ends of the middle partition (6) and the flow dividing partition (7), and the upper baffle (8) is attached and sealed with the inner wall of the valve body (1) at the periphery of the outer edge of the opening area of the middle partition (6); the lower baffle (9) is attached and sealed with the inner wall of the valve body (1) at the periphery of the outer edge of the opening position of the middle partition plate (6);

the lower baffle (9) is provided with a first through hole (10), and the first through hole (10) is communicated with a cavity in the middle of the middle partition plate (6); baffle (9) are equipped with down and go out axle (11), go out the axle (11) centre down and be equipped with second opening (12), first opening (10) and second opening (12) communicate with each other.

2. An eccentric structure multi-way valve according to claim 1, characterized in that the upper part of the upper baffle (8) is provided with an upper output shaft (13), and the radial directions of the upper output shaft (13) and the lower output shaft (11) are provided with a preset side pushing piece (14);

the preset side pushing piece (14) enables the geometric circle center of the valve core (4) and the rotating circle center of the valve core (4) to be eccentric, and the preset side pushing piece (14) pushes the middle partition component (5) to be attached to or separated from the inner wall of the valve body (1).

3. An eccentric structure multi-way valve according to claim 2, characterized in that the upper output shaft (13) is provided with an upper bearing (15), the lower output shaft (11) is provided with a lower bearing (16), and the upper bearing (15) and the lower bearing (16) are both positioned outside the preset side push piece (14);

an upper bearing cover (17) is arranged on the outer side of the upper bearing (15), and the outer wall of the upper bearing cover (17) is matched with the inner wall of the valve body (1); the outer side of the lower bearing (16) is provided with a lower bearing cover (18), and the outer wall of the lower bearing cover (18) is matched with the inner wall of the valve body (1).

4. An eccentric structure multi-way valve according to claim 3, characterized in that a driving assembly (19) is arranged above the upper bearing cover (17), and a power shaft of the driving assembly (19) is connected with the upper output shaft (13);

a power supporting plate (20) is arranged in the valve body (1), and a driving assembly (19) is fixed on the power supporting plate (20) or directly fixed on the upper bearing cover (17); the drive assembly (19) is provided with an outgoing line, the upper cover body (2) is connected with a terminal board (21), the terminal board (21) is connected with a binding post (22), and the lower part of the binding post (22) is connected with the outgoing line of the drive assembly (19).

5. The multi-way valve with the eccentric structure is characterized in that the lower output shaft (11) is led out through a middle hole of the lower bearing cover (18), a sensor plate (23) is arranged at the lower part of the lower output shaft (11), and the sensor plate (23) is provided with a magnetic block (24);

the lower cover body (3) is provided with a sensor blind hole, a sensor is arranged in the sensor blind hole, and the magnetic block (24) rotates along with the valve core (4) to be sensed by the sensor periodically or at intervals.

6. The multi-way valve with the eccentric structure is characterized in that the upper output shaft (13) and the upper bearing cover (17) are provided with maintenance seals (25) at the matching positions, and the lower output shaft (11) and the lower bearing cover (18) are provided with maintenance seals (25); a terminal plate sealing element (26) is arranged between the terminal plate (21) and the upper cover body (2);

matching sealing pieces (27) are arranged on the matching surface positions of the upper surface of the valve body (1) and the upper cover body (2) and the matching surface positions of the valve body (1) and the lower cover body (3);

a movable stop block (28) is arranged at the lower part of the lower output shaft (11), and a fixed limit stop block (29) is arranged on the lower cover body (3) or the lower bearing cover (18); the movable stop block (28) is limited and stopped by the fixed limit stop block (29) in the rotating process along with the valve core (4);

and a sight glass (30) is arranged at the middle position of the lower cover body (3) or on the side wall of the valve body (1).

7. The eccentric structure multi-way valve according to claim 6, wherein the upper bearing (15) and the lower bearing (16) are both tapered rollers or tapered sliding bearings, and a spring is arranged at any position of the lower part of the lower bearing cover (18), the upper part of the upper bearing cover (17), the inner ring of the tapered bearing or the outer ring of the tapered bearing, and the spring is a disc spring, a wave spring or a compression spring.

8. The eccentric structure multi-way valve according to claim 7, wherein the lower part of the lower bearing cover (18), the upper part of the upper bearing cover (17) or the side wall of the valve body (1) is provided with at least one control channel K, the control channel K is connected with a control valve, the control valve adopts one of an electromagnetic valve, a four-way valve, a three-way valve, a ball valve or a gate valve, and the control valve is connected with a high-pressure source or a low-pressure source.

9. The multi-way valve with the eccentric structure according to claim 7, wherein the middle partition plate (6) is U-shaped, and at least one channel J is arranged at the position of the upper output shaft (13) or the lower output shaft (11) and is communicated with the hollow cavity of the U-shaped middle partition plate (6) of the valve core (4);

the lower bearing cover (18) or the upper bearing cover (17) is provided with an anti-rotation pin (34), one end of the anti-rotation pin (34) is connected with the lower bearing cover (18) or the upper bearing cover (17), and the other end of the anti-rotation pin (34) is connected with the valve body (1) or the power support plate (20);

the lower bearing cover (18) or the upper bearing cover (17) is at least provided with a pore channel L, the channel L is communicated with a semicircular defect part of the valve core (4), the output shaft of the driving component (19) is provided with a rotating plate (32), the rotating plate (32) is provided with a valve head (33), the valve head (33) is provided with a pre-pressing spring (31), and the valve head (33) is driven by the rotating plate (32) to open and close the pore channel L.

10. The eccentric structure multi-way valve according to claim 1, wherein the driving assembly (19) comprises a motor and a speed reducer, the speed reducer is any one of a planetary speed reducer, a worm gear speed reducer, a hard tooth surface speed reducer, a harmonic speed reducer and a cycloidal speed reducer, and the motor is any one of a direct current motor, an alternating current motor, a permanent magnet motor, a shield motor, a stepping motor, a servo motor and a magnetic coupling;

the sensor is a magnetic sensor, a photoelectric sensor or a mechanical switch, the sensor is arranged in the middle of the valve body (1) or on the side wall of the valve body (1), the number of the sensors is at least one, and the number of the magnetic blocks (24) corresponding to the sensors is at least one;

a terminal protection cover is arranged on the outer side of the terminal board (21), a hole is formed in the side surface of the terminal protection cover, and a lead of the terminal board (21) is led out to a junction box arranged on the side part of the upper cover body (2) through the side hole of the terminal board (21);

a sensor protective cover is arranged outside the sensor, a hole is formed in the side face of the sensor protective cover, and a lead of the sensor is led out to a junction box arranged at the side part of the upper cover body (2) through the hole of the sensor protective cover;

or the terminal board (21) is arranged at the side part of the valve body (1), and the sensor is arranged at the middle part or on the side wall in the valve body (1);

a wear-resistant sealing element is arranged at a matching position, close to the valve core (4), on the outer wall of the valve core (4) or the inner wall of the valve body (1), and the wear-resistant sealing element is made of a composite material, an alloy or a polytetrafluoroethylene high polymer material;

the wear-resistant sealing element is a copper sleeve, and the copper sleeve is provided with a hole embedded with a lubricating material; the wear-resistant sealing element is assembled in a mode of embedding, casting, welding or spraying.

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