CN112344083A - Leakage-proof magnetic transmission rotary valve - Google Patents

Leakage-proof magnetic transmission rotary valve Download PDF

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Publication number
CN112344083A
CN112344083A CN202011476213.3A CN202011476213A CN112344083A CN 112344083 A CN112344083 A CN 112344083A CN 202011476213 A CN202011476213 A CN 202011476213A CN 112344083 A CN112344083 A CN 112344083A
Authority
CN
China
Prior art keywords
magnetic rotor
valve
rotor
permanent magnets
valve rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011476213.3A
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Chinese (zh)
Inventor
王向东
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Shanghai Jiaotong University Baotou Materials Research Institute
Original Assignee
Shanghai Jiaotong University Baotou Materials Research Institute
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Filing date
Publication date
Application filed by Shanghai Jiaotong University Baotou Materials Research Institute filed Critical Shanghai Jiaotong University Baotou Materials Research Institute
Priority to CN202011476213.3A priority Critical patent/CN112344083A/en
Publication of CN112344083A publication Critical patent/CN112344083A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

The invention discloses a leakage-proof magnetic transmission rotary valve which comprises a shell, a driving shaft, an external magnetic rotor, an isolation cover, an internal magnetic rotor, a valve rod, a valve core and a valve body, wherein the driving shaft extends into the shell and is concentrically sleeved with the external magnetic rotor, so that the external magnetic rotor synchronously rotates along with the driving shaft; the inner magnetic rotor and the outer magnetic rotor are arranged concentrically, and the magnetic fields are opposite; the isolating cover isolates the inner magnetic rotor from the outer magnetic rotor and fixes the inner magnetic rotor and the outer magnetic rotor; the inner magnetic rotor, the outer magnetic rotor and the isolation cover are not in contact with each other and are all arranged in the shell; the inner magnetic rotor and one end of the valve rod are concentrically sleeved, so that the valve rod synchronously rotates along with the inner magnetic rotor; the other end of the valve rod penetrates through the valve body and extends downwards to be connected with the valve core, so that the valve core rotates around the valve rod; the valve core is arranged in the valve body; the invention realizes non-contact transmission by utilizing magnetic force, thoroughly solves the leakage problem of the dynamic seal, greatly improves the reliability of the seal and is suitable for popularization and use.

Description

Leakage-proof magnetic transmission rotary valve
Technical Field
The invention relates to the technical field of rotary valves, in particular to a leakage-proof magnetic transmission rotary valve.
Background
The rotary valve drives the valve rod to act through the driving mechanism and rotates clockwise or anticlockwise respectively to achieve the purpose of closing or opening the valve. The driving mechanism can not be arranged in the valve body, but only can be arranged outside the valve body, and the valve rod is connected with the driving mechanism and the valve core and transmits torque required by opening and closing the valve. In a traditional rotary valve structure, a valve rod is sealed by adopting a packing material, but because the valve rod has relative rotary motion, after the rotary valve structure is used for a long time, due to the reasons of abrasion, corrosion and the like, a gap between the valve rod and the packing material is larger and larger, the sealing failure is caused, and fluid with certain pressure in a valve body is easy to leak out along the gap of a protruding part of the valve rod. The leakage not only affects the field environment, but also is difficult to ensure the safety in the application occasions where the leakage is not allowed, such as corrosive or toxic.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a leakage-proof magnetic transmission rotary valve which aims to: the driving mechanism is completely isolated from the valve rod, and the rotary valve can be completely closed.
The technical scheme adopted by the invention is as follows: a leakage-proof magnetic transmission rotary valve comprises a shell, a driving shaft, an external magnetic rotor, a separation cover, an internal magnetic rotor, a valve rod, a valve core and a valve body, wherein the driving shaft extends into the shell and is concentrically sleeved with the external magnetic rotor, so that the external magnetic rotor synchronously rotates along with the driving shaft; the inner magnetic rotor and the outer magnetic rotor are arranged concentrically, and the magnetic fields are opposite; the isolating cover isolates the inner magnetic rotor from the outer magnetic rotor and fixes the inner magnetic rotor and the outer magnetic rotor; the inner magnetic rotor, the outer magnetic rotor and the isolation cover are not in contact with each other and are all arranged in the shell; the inner magnetic rotor and one end of the valve rod are concentrically sleeved, so that the valve rod synchronously rotates along with the inner magnetic rotor; the other end of the valve rod penetrates through the valve body and extends downwards to be connected with the valve core, so that the valve core rotates around the valve rod; the valve core is arranged in the valve body.
Preferably, the outer magnetic rotor and the inner magnetic rotor are both of a cylindrical structure, the number of the permanent magnets on the outer magnetic rotor and the number of the permanent magnets on the inner magnetic rotor are equal, the permanent magnets are both 2n, the permanent magnets are uniformly distributed along the circumferential surfaces of the outer magnetic rotor and the inner magnetic rotor, the magnetic field directions of the permanent magnets are radial, and the magnetic field directions of the adjacent permanent magnets on the same rotor are opposite.
Or the outer magnetic rotor and the inner magnetic rotor are both in a disc-shaped structure, the number of the permanent magnets on the outer magnetic rotor and the number of the permanent magnets on the inner magnetic rotor are equal, the permanent magnets are all 2n, the permanent magnets are arranged on the disc surface and are uniformly distributed along the circumferential direction, the magnetic field directions of the permanent magnets are axial, and the magnetic field directions of the adjacent permanent magnets on the same rotor are opposite.
Furthermore, the isolation cover is made of a non-magnetic material; the isolation cover is fixed on the valve body, a sealing ring is arranged on the contact surface of the isolation cover and the valve body, and static sealing is realized through the sealing ring; the isolation cover isolates the valve rod from the driving shaft, and the leakage at the valve rod is maintained in the isolation cover.
Further, the driving mechanism of the driving shaft includes, but is not limited to, a hand wheel, an electric actuator and a pneumatic actuator.
The invention has the beneficial effects that: compared with the prior art, the invention has the following advantages: the leakage-proof magnetic transmission rotary valve realizes power transmission through magnetic force, utilizes the characteristic that the magnetic transmission does not need to be contacted, and completely isolates the valve rod from the driving structure through the isolation cover, so that fluid is completely sealed in the isolation cover and the valve body.
Drawings
Fig. 1 is a schematic structural diagram of a leakage-proof magnetically-actuated rotary valve according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the leakage-proof magnetically-actuated rotary valve of the present invention.
In the figure: 1-shell, 2-drive shaft, 3-outer magnetic rotor, 4-isolation cover, 5-inner magnetic rotor, 6-valve rod, 7-valve core, 8-valve body, 9-permanent magnet, 10-sealing ring and 11-drive mechanism.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and examples, which are described below for illustrating the technical solution of the present invention and not for limiting the same.
As shown in fig. 1-2, a leakage-proof magnetic transmission rotary valve comprises a housing (1), a driving shaft (2), an outer magnetic rotor (3), a shielding case (4), an inner magnetic rotor (5), a valve rod (6), a valve core (7) and a valve body (8). The driving shaft (2) extends into the shell (1) and is concentrically sleeved with the external magnetic rotor (3), so that the external magnetic rotor (3) synchronously rotates along with the driving shaft (2); the inner magnetic rotor (5) and the outer magnetic rotor (3) are arranged concentrically, and the magnetic fields are opposite; the isolation cover (4) isolates the inner magnetic rotor (5) from the outer magnetic rotor (3) and is fixed; the inner magnetic rotor (5), the outer magnetic rotor (3) and the isolation cover (4) are not in contact with each other and are all arranged in the shell (1); the inner magnetic rotor (5) and one end of the valve rod (6) are concentrically sleeved, so that the valve rod (6) synchronously rotates along with the inner magnetic rotor (5); the other end of the valve rod (6) penetrates through the valve body and extends downwards to be connected with the valve core (7), so that the valve core (7) rotates around the valve rod (6); the valve core (7) is arranged inside the valve body (8). The isolation cover (4) is made of non-magnetic conductive material. The isolation cover (4) is fixed on the valve body (8), a sealing ring (10) is arranged on the contact surface of the isolation cover (4) and the valve body (8), and static sealing is realized through the sealing ring (10). The isolation cover (4) isolates the valve rod (6) from the driving shaft (2), and leakage at the valve rod (6) is maintained in the isolation cover (4).
When the rotary valve works, the driving shaft (2) is driven by the driving mechanism (11) to rotate and drive the outer magnetic rotor (3) to rotate, the outer magnetic rotor (3) drives the inner magnetic rotor (5) to rotate in the same direction through magnetic field coupling, and further drives the valve rod (6) to rotate, and the valve rod (6) drives the valve core (7) to rotate when rotating, so that the rotary valve is opened and closed.
As an embodiment, as shown in fig. 1, the outer magnetic rotor (3) and the inner magnetic rotor (4) are both of a cylindrical structure, the number of the permanent magnets (9) on the outer magnetic rotor (3) and the inner magnetic rotor (4) is equal, and the number of the permanent magnets is 2n, the permanent magnets (9) are uniformly distributed along the circumferential surfaces of the outer magnetic rotor and the inner magnetic rotor, the magnetic field directions of the permanent magnets (9) are radial, and the magnetic field directions of the adjacent permanent magnets (9) on the same rotor are opposite.
As an embodiment, as shown in fig. 2, the outer magnetic rotor (3) and the inner magnetic rotor (4) are both disc-shaped structures, the number of the permanent magnets (9) on the outer magnetic rotor (3) and the inner magnetic rotor (4) is equal, and the permanent magnets are 2n, the permanent magnets (9) are arranged on the disc surface and uniformly distributed along the circumferential direction, the magnetic field direction of the permanent magnets (9) is axial, and the magnetic field directions of the adjacent permanent magnets (9) on the same rotor are opposite.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention; the technology not related to the invention can be realized by the prior art.

Claims (6)

1. The utility model provides a prevent magnetic drive rotary valve of leakage, includes shell (1), drive shaft (2), outer magnet rotor (3), cage (4), interior magnet rotor (5), valve rod (6), case (7), valve body (8), its characterized in that: the driving shaft (2) extends into the shell (1) and is concentrically sleeved with the outer magnetic rotor (3), so that the outer magnetic rotor (3) synchronously rotates along with the driving shaft (2); the inner magnetic rotor (5) and the outer magnetic rotor (3) are arranged concentrically, and the magnetic fields are opposite; the isolation cover (4) isolates the inner magnetic rotor (5) from the outer magnetic rotor (3) and is fixed; the inner magnetic rotor (5), the outer magnetic rotor (3) and the isolation cover (4) are not in contact with each other and are all arranged in the shell (1); the inner magnetic rotor (5) and one end of the valve rod (6) are concentrically sleeved, so that the valve rod (6) synchronously rotates along with the inner magnetic rotor (5); the other end of the valve rod (6) penetrates through the valve body and extends downwards to be connected with the valve core (7), so that the valve core (7) rotates around the valve rod (6); the valve core (7) is arranged inside the valve body (8).
2. A leak resistant, magnetically actuated rotary valve as claimed in claim 1, wherein: the outer magnetic rotor (3) and the inner magnetic rotor (4) are both of a cylindrical structure, the number of the permanent magnets (9) on the outer magnetic rotor (3) and the inner magnetic rotor (4) is equal, the number of the permanent magnets is 2n, the permanent magnets (9) are uniformly distributed along the circumferential surfaces of the outer magnetic rotor and the inner magnetic rotor, the magnetic field directions of the permanent magnets (9) are radial, and the magnetic field directions of the adjacent permanent magnets (9) on the same rotor are opposite.
3. A leak resistant, magnetically actuated rotary valve as claimed in claim 1, wherein: the outer magnetic rotor (3) and the inner magnetic rotor (4) are both disc-shaped structures, the number of the permanent magnets (9) on the outer magnetic rotor (3) and the number of the permanent magnets (9) on the inner magnetic rotor (4) are equal and are 2n, the permanent magnets (9) are arranged on a disc surface and are uniformly distributed along the circumferential direction, the magnetic field directions of the permanent magnets (9) are axial, and the magnetic field directions of the adjacent permanent magnets (9) on the same rotor are opposite.
4. A leak resistant, magnetically actuated rotary valve as claimed in any one of claims 1-3, wherein: the isolation cover (4) is made of non-magnetic materials.
5. A leak resistant, magnetically actuated rotary valve as claimed in any one of claims 1-3, wherein: the isolation cover (4) is fixed on the valve body (8), a sealing ring (10) is arranged on the contact surface of the isolation cover (4) and the valve body (8), and static sealing is realized through the sealing ring (10); the isolation cover (4) isolates the valve rod (6) from the driving shaft (2), and leakage at the valve rod (6) is maintained in the isolation cover (4).
6. A leak resistant, magnetically actuated rotary valve as claimed in any one of claims 1-3, wherein: the driving mechanism (11) of the driving shaft (2) is a hand wheel or an electric actuating mechanism or a pneumatic actuating mechanism.
CN202011476213.3A 2020-12-15 2020-12-15 Leakage-proof magnetic transmission rotary valve Pending CN112344083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011476213.3A CN112344083A (en) 2020-12-15 2020-12-15 Leakage-proof magnetic transmission rotary valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011476213.3A CN112344083A (en) 2020-12-15 2020-12-15 Leakage-proof magnetic transmission rotary valve

Publications (1)

Publication Number Publication Date
CN112344083A true CN112344083A (en) 2021-02-09

Family

ID=74427412

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011476213.3A Pending CN112344083A (en) 2020-12-15 2020-12-15 Leakage-proof magnetic transmission rotary valve

Country Status (1)

Country Link
CN (1) CN112344083A (en)

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