CN112013127A - Long-life automatically controlled ball valve - Google Patents
Long-life automatically controlled ball valve Download PDFInfo
- Publication number
- CN112013127A CN112013127A CN202010978987.XA CN202010978987A CN112013127A CN 112013127 A CN112013127 A CN 112013127A CN 202010978987 A CN202010978987 A CN 202010978987A CN 112013127 A CN112013127 A CN 112013127A
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- Prior art keywords
- valve
- valve body
- sealing
- sealing sleeve
- sensor
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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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
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/184—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention belongs to the technical field of electric control ball valves, and particularly relates to a long-service-life electric control ball valve which comprises a ball valve body and an electric control device for controlling the ball valve body, wherein the ball valve body comprises a valve body, a valve ball and a valve rod, one end of the valve rod, which penetrates through the valve body, is connected with the electric control device, and the electric control device controls the position of the valve ball in the valve body by controlling the rotation of the valve rod; the sealing pipe is arranged on the outer wall of the valve body, the valve rod penetrates through the valve body and then is movably and hermetically connected with the sealing pipe, the electric control device comprises a motor and a speed reducer, the upper end of the sealing pipe is connected to the lower port of the valve body, the valve body extends into the seat body from the lower port of the seat body and then is connected with the speed reducer, and the electric control device further comprises a sealing cover covering the upper port of the valve body and an anti-seepage device used for preventing water from leaking into the seat body through the valve rod. In order to improve the anti-seepage effect of the ball valve and prevent water from entering the seat body of the electric control device, the anti-seepage device is arranged on the valve rod, and the sealing performance of the valve rod is improved through the anti-seepage device.
Description
Technical Field
The invention belongs to the technical field of electric control ball valves, and particularly relates to a long-service-life electric control ball valve.
Background
The electric ball valve is formed by an electric actuating mechanism and a ball valve. The pipe pressure element is a pipe pressure element for industrial automation process control, and is generally used for remote opening and closing (switching on and off) control of pipe media.
The invention discloses a Chinese patent with publication number CN103062473B, which discloses an electric ball valve, comprising a control component and an execution component, wherein the execution component comprises a valve body, a valve core and a valve rod, the control component comprises an electric control device, a speed reducer and a motor controlled by the electric control device, the motor drives the valve rod to rotate through the speed reducer to open or close the valve body, the control component further comprises a displacement detection element, the displacement detection element is electrically connected to the electric control device, a touch part is arranged on the speed reducer, the speed reducer drives the valve rod and simultaneously drives the touch part to act, the touch part triggers the displacement detection element to generate a displacement signal when the valve rod rotates to the position, and the electric control device receives the displacement signal and feeds back the displacement signal to an external circuit system.
The control component is internally provided with a displacement detection element, the speed reducer is provided with a touch part, the speed reducer drives the touch part to trigger the displacement detection element to generate a displacement signal, and the electric control device receives the displacement signal and feeds the displacement signal back to an external circuit system. Whether the opening and closing of the valve are in place or not is monitored through the feedback signal, and hidden dangers of the valve due to the fact that the opening and closing in-place state is difficult to judge can be prevented.
Because the electric actuator in the electric ball valve can not intake water, otherwise burns out easily, will strictly take precautions against to this water seepage problem to the electric ball valve, nevertheless does not solve the water seepage problem of valve rod and electric actuator in the above-mentioned patent.
Disclosure of Invention
The invention aims to solve the technical problems, and provides an electric control ball valve which is improved in leakage-proof effect and further prolonged in service life.
The purpose of the invention is realized as follows: the utility model provides a long-life automatically controlled ball valve, includes the ball valve body and is used for controlling the electrically controlled device of ball valve body, the ball valve body including be the tubulose valve body of cavity, set up valve ball and the valve rod that the other end runs through the valve body in the valve body on the valve ball and one end, the valve rod passes the one end of valve body with electrically controlled device links to each other, electrically controlled device passes through control the rotation of valve rod, in order to control the valve ball is in position in the valve body will the both ends mouth of valve body cuts off or communicates its characterized in that: the valve body is characterized in that a sealing pipe is arranged on the outer wall of the valve body, the valve rod penetrates through the valve body and then is movably and hermetically connected with the sealing pipe, the electric control device comprises a seat body with an upper port and a lower port and a motor and a speed reducer which are arranged in the seat body, the motor is connected with the speed reducer, the upper end of the sealing pipe is connected onto the lower port of the valve body, the valve body is arranged on the lower port of the seat body, the lower port of the seat body extends into the seat body, the seat body is internally connected with the speed reducer, the electric control device further comprises a sealing cover which is covered on the upper port of the valve body, and an anti-seepage device.
The invention is further configured to: the anti-seepage device comprises a fastening ring sleeved on the valve rod, the upper end of the fastening ring is tightly propped against the limiting ring, and the lower end of the fastening ring is tightly propped against the inner port of the lower port of the valve body so as to seal the valve rod.
The invention is further configured to: the inner wall of the fastening ring is provided with a sealing sleeve, the inner wall of the sealing sleeve abuts against the outer wall of the valve rod, and the upper end and the lower end of the sealing sleeve abut against the inner ports of the lower ports of the limiting ring and the valve body respectively.
The invention is further configured to: the sealing sleeve is of a composite structure and sequentially comprises a first sealing sleeve, a first framework sleeve, a second sealing sleeve and a second framework sleeve from inside to outside, the inner wall of the first sealing sleeve abuts against the outer wall of the valve rod, the outer wall of the second framework sleeve abuts against the inner wall of the fastening ring, the first sealing sleeve and the second sealing sleeve are made of water-absorbing expansion resin materials and can expand after absorbing water, the first framework sleeve and the second framework are made of metal materials and are provided with openings respectively, the sealing sleeves are extruded, and the openings can contract inwards; the anti-seepage device comprises a sealing sleeve, a fastening ring, a first fastening section, a second fastening section, a plug pin, a leak detection component, an adjusting component, an alarm and a controller, wherein the sealing sleeve is provided with a sealing sleeve surface, the first fastening section is hinged with one end of the second fastening section, the other end of the first fastening section is provided with an ear plate, the ear plate of the first fastening section is provided with the plug pin, the ear plate of the second fastening section is provided with a slot for the plug pin to be embedded in, and the anti-seepage device further comprises a leak detection component for detecting the moisture on the surface of the sealing sleeve, and the adjusting component, the alarm and the controller are used for controlling the distance between the ear plates of the first fastening section and the second fastening section;
the leak detection component comprises a first sensor arranged between the first sealing sleeve and the first framework sleeve and a second sensor arranged between the second sealing sleeve and the second framework;
the adjusting component comprises an electromagnet arranged on the first fastening section lug plate and a permanent magnet arranged on the second fastening section lug plate and opposite to the electromagnet;
the first sensor and the second sensor are resistance strain type pressure sensors, and send detected signals to the controller; according to the signal sent by the first sensor, the controller judges that the first sealing sleeve is filled with water according to the resistance change condition detected by the controller, the electromagnet has magnetic attraction or increases the magnetic attraction by starting or increasing the current on the electromagnetic coil of the electromagnet, and the distance between the lug plates of the first fastening section and the second fastening section is reduced under the mutual attraction of the electromagnet and the permanent magnet; through the signal that the second sensor sent, the controller is according to its resistance change condition that detects, after judging that the second seal cover is intake, the controller control the siren sends out the police dispatch newspaper.
The invention is further configured to: the controller is controlled in the following manner,
when the ball valve leaks under the water pressure, water in the valve body flows into the valve seat body from the valve rod;
in the initial stage, after the first sealing sleeve is contacted with water, the first sealing sleeve expands, the expanded first sealing sleeve can extrude the first sensor, the resistance value detected by the first sensor changes, at the moment, the controller starts the current on the electromagnetic coil of the electromagnet, so that the electromagnet has magnetic attraction and attracts the permanent magnet, and the clamping force of the fastening ring is increased, so that the sealing strength of the sealing ring and the valve rod is improved;
if the resistance value detected by the second sensor tends to be stable after the T time period, the sealing condition of the second sealing sleeve is normal and no leakage phenomenon exists, and the controller controls the current amount passing through the electromagnetic coil of the electromagnet to keep constant;
if the resistance value detected by the second sensor changes after the T time period, the second sealing sleeve is indicated to be permeated, and the controller gradually increases the current on the electromagnetic coil of the electromagnet; in the process of current increase, if the resistance value detected by the second sensor is increased and then tends to be stable, the water leakage condition is controlled, and the controller controls the current amount passing through the electromagnetic coil of the electromagnet to keep constant; and in the process of increasing the current, if the resistance value detected by the second sensor continuously increases, the liquid leakage condition is difficult to control, and the controller controls the alarm to give an alarm sound.
The invention is further configured to: there is the spacing groove of radial inside setting on the lower port inner wall of sealing tube, the spacing groove divide into first annular and second annular, just the internal diameter of first annular is greater than the internal diameter of second annular, be provided with on the valve rod and be located single-ended mechanical seal spare in the second annular, still be provided with on the valve rod and be located in the second annular and right single-ended mechanical seal spare carries out spacing first spacing portion, and is located just support in the first annular in tightly in the spacing portion of second in first spacing portion.
The invention is further configured to: the outer wall of the valve rod is provided with an annular assembling groove which is radially and inwards arranged, and a sealing ring of which the outer wall is tightly propped against the inner wall of the sealing pipeline is sleeved in the annular assembling groove.
The invention is further configured to: the valve body divide into first valve body and second valve body, first valve body with second valve body threaded connection, the valve ball is located in the first valve body, the sealing tube is located on the first valve body, and the two structure as an organic whole.
The invention has the beneficial effects that:
1. in order to improve the anti-seepage effect of the ball valve and prevent water from entering the seat body of the electric control device, the anti-seepage device is arranged on the valve rod, and the sealing performance of the valve rod is improved through the anti-seepage device;
in order to detect the problem of water seepage of the valve rod in time, a leakage detecting component for detecting water leakage is arranged; after the first sealing sleeve expands, the first sensor is extruded, the resistance value detected by the first sensor changes, namely increases, and the controller can judge that the first sealing sleeve has water inflow according to the resistance change condition detected by the first sensor;
after the first sealing sleeve is filled with water, an adjusting component is arranged for achieving the purpose of leakage prevention, and the clamping force of the fastening ring is increased through the adjusting component, wherein after the controller judges that the first sealing sleeve is filled with water, the electromagnet has magnetic attraction or increases the magnetic attraction by starting or increasing the current on the electromagnetic coil of the electromagnet, and under the mutual attraction of the electromagnet and the permanent magnet, the distance between the lug plates of the first fastening section and the second fastening section is reduced, so that the purpose of increasing the sealing performance between the first sealing sleeve and the valve rod is achieved; when the resistance value detected by the second sensor is increased, the second sealing sleeve is indicated to be filled with water, and the water flows to the second sealing sleeve from the upper bottom surface of the seat body;
in order to be found and processed by people in time, the controller can control the alarm to give out alarm sound, and the alarm sound is used for reminding.
2. Because the sensor is a sensitive element, in order to avoid that the second compressed sealing sleeve has weak extrusion force on the second sensor while the suction force of the electromagnet is adjusted, the extrusion force may cause the resistance value detected by the second sensor to fluctuate, and the interference fluctuation may cause the current of the electromagnetic coil on the electromagnet controlled by the controller to continuously increase, so that the detection is inaccurate, and the second sensor is arranged at a distance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the construction of the barrier of the present invention;
FIG. 3 is an enlarged view of the invention at A in FIG. 2;
FIG. 4 is a block diagram of the connections of the controller of the present invention;
the reference numbers in the figures are: 1. a ball valve body; 11. a valve body; 111. a first valve body; 112. a second valve body; 12. a valve ball; 13. a valve stem; 131. a limiting ring; 132. a single-ended mechanical seal; 133. a first limiting part; 134. a second limiting part; 135. a seal ring; 14. a sealing tube; 2. an electric control device; 21. a base body; 22. a motor; 23. a speed reducer; 24. a sealing cover; 25. an anti-seepage device; 251. a fastening ring; 2511. a first fastening section; 2512. a second fastening section; 2513. an ear plate; 2514. a bolt; 2515. a slot; 252. a first seal cartridge; 253. a first skeletal sleeve; 254. a second seal cartridge; 255. a second skeletal sleeve; 2551. a polymer water-absorbent resin sheet; 2552. a barrier net; 2553. a water diversion strip; 256. a leak detection member; 2561. a first sensor; 2562. a second sensor; 257. an adjustment member; 2571. an electromagnet; 2572. a permanent magnet; 258. an alarm; 259. and a controller.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description clearly and completely describes the technical solution in the embodiments of the present invention with reference to the accompanying drawings:
a long-life electric control ball valve is shown in figure 1, and comprises a ball valve body 1 and an electric control device 2 for controlling the ball valve body 1, wherein the ball valve body 1 comprises a hollow tubular valve body 11, a valve ball 12 arranged in the valve body 11 and a valve rod 13, one end of the valve rod 13 is arranged on the valve ball 12, the other end of the valve rod 13 penetrates through the valve body 11, one end of the valve rod 13 penetrates through the valve body 11 to be connected with the electric control device 2, the electric control device 2 controls the position of the valve ball 12 in the valve body 11 by controlling the rotation of the valve rod 13 to separate or communicate two ports of the valve body 11, wherein,
the outer wall of the valve body 11 is provided with a sealing pipe 14, the valve rod 13 penetrates through the valve body 11 and then is movably and hermetically connected with the sealing pipe 14, the electric control device 2 comprises a seat body 21 with an upper port and a lower port, a motor 22 and a speed reducer 23 which are arranged in the seat body 21, the motor 22 is connected with the speed reducer 23, the upper end of the sealing pipe 14 is connected to the lower port of the valve body 11, the valve body 11 extends into the seat body 21 from the lower port of the seat body 21 and then is connected with the speed reducer 23, the electric control device 2 further comprises a sealing cover 24 which covers the upper port of the valve body 11, and an anti-seepage device 25 which is positioned in the valve body 11 and used for.
Two ports of the valve body 11 are used for connecting pipelines, when the pipelines need to be communicated or disconnected, the rotation of the valve ball 12 is controlled by the motor 22, wherein the motor 22 drives the valve rod 13 to rotate after being decelerated by the reducer 23, the valve rod 13 drives the valve ball 12 to rotate, and the two pipelines are separated or communicated by controlling the position of the valve ball 12 in the valve body 11;
in order to improve the anti-seepage effect of the ball valve and prevent water from entering the seat body 21 of the electric control device 2, the anti-seepage device 25 is arranged on the valve rod 13, and the sealing performance of the valve rod 13 is improved through the anti-seepage device 25.
As shown in fig. 1, fig. 2 and fig. 3, a limiting ring 131 is disposed at one end of the valve stem 13 in the seat body 21, the anti-seepage device 25 includes a fastening ring 251 sleeved on the valve stem 13, an upper end of the fastening ring 251 abuts against the limiting ring 131, and a lower end abuts against an inner port of a lower port of the valve body 11, so as to seal the valve stem 13; the inner wall of the fastening ring 251 is provided with a sealing sleeve, the inner wall of the sealing sleeve abuts against the outer wall of the valve rod 13, and the upper end and the lower end of the sealing sleeve abut against the inner ports of the lower ports of the limiting ring 131 and the valve body 11 respectively.
The sealing performance of the valve rod 13 is improved by arranging the fastening ring 251, wherein after the fastening ring 251 is sleeved on the valve rod 13, the limiting ring 131 is installed on the valve rod 13, and the upper end and the lower end of the fastening ring 251 are respectively abutted against the limiting ring 131 and the inner port of the lower port of the valve body 11; because the valve rod 13 needs to rotate, the valve rod 13 can drive the fastening ring 251, the sealing sleeve rotates simultaneously, the fastening ring 251, the lower end of the sealing sleeve rotates on the inner port of the lower port of the seat body 21, also can be the fastening ring 251, the sealing sleeve is fixed, the valve rod 13 rotates relative to the fastening ring 251 and the sealing sleeve, however, for reducing friction and reducing abrasion, to this end, the fastening ring 251 is sleeved on the valve rod 13, and after the limiting ring 131 clamps the valve rod, the fastening ring 251 is fixed at the upper bottom of the seat body 21, and the limiting ring 131 is directionally rotated and arranged, so that the valve rod 13 only rubs the inner wall of the sealing sleeve when rotating, and further, the purpose of reducing abrasion is achieved.
The sealing sleeve is of a composite structure and sequentially comprises a first sealing sleeve 252, a first framework sleeve 253, a second sealing sleeve 254 and a second framework sleeve 255 from inside to outside, the inner wall of the first sealing sleeve 252 abuts against the outer wall of the valve rod 13, the outer wall of the second framework sleeve 255 abuts against the inner wall of the fastening ring 251, the first sealing sleeve 252 and the second sealing sleeve 254 are made of water-absorbent expansion resin materials and can expand after absorbing water, the first framework sleeve 253 and the second framework are made of metal materials and are provided with openings, and the sealing sleeves are extruded, and the openings can contract inwards; the fastening ring 251 is composed of a first fastening section 2511 and a second fastening section 2512 in two semi-annular shapes, one end of the first fastening section 2511 is hinged with one end of the second fastening section 2512, the other ends of the first fastening section 2511 and the second fastening section 2512 are respectively provided with an ear plate 2513, the ear plate 2513 of the first fastening section 2511 is provided with a plug 2514, the ear plate 2513 of the second fastening section 2512 is provided with a slot 2515 for the plug 2514 to be embedded, and when the fastening ring 251 is assembled, the two ear plates 2513 are positioned on the same side with the openings on the first framework sleeve 253 and the second framework sleeve 255;
as shown in fig. 2, 3 and 4, the anti-seepage device 25 further includes a leak detection component 256 for detecting the presence of moisture on the surface of the sealing sleeve, a regulating component 257 for controlling the spacing between the ear plates 2513 and 2513 of the first and second fastening sections 2511 and 2512, an alarm 258, and a controller 259;
the adjusting member 257 includes an electromagnet 2571 provided on the ear plate 2513 of the first fastening section 2511 and a permanent magnet 2572 provided on the ear plate 2513 of the second fastening section 2512 and aligned with the electromagnet 2571;
the first sensor 2561 and the second sensor 2562 are resistance strain gauge pressure sensors, and the first sensor 2561 and the second sensor 2562 send detected signals to the controller 259; after the controller 259 determines that the first sealing sleeve 252 has entered water according to the resistance change detected by the first sensor 2561 through a signal sent by the first sensor 2561, the electromagnet 2571 has magnetic attraction or increases magnetic attraction by turning on or increasing the current on the electromagnetic coil of the electromagnet 2571, and the distance between the first fastening section 2511 and the second fastening section 2512 is reduced by the mutual attraction between the electromagnet 2571 and the permanent magnet 2572; through the signal sent by the second sensor 2562, the controller 259 controls the alarm 258 to give an alarm after judging that the second sealing sleeve 254 has entered water according to the detected resistance change condition of the controller 259.
In order to detect the problem of water leakage of the valve rod 13 in time, a leakage detecting component 256 for detecting water leakage is arranged; wherein, the sealing sleeve is arranged to include a first sealing sleeve 252, a first skeleton sleeve 253, a second sealing sleeve 254 and a second skeleton sleeve 255, the first sealing sleeve 252 and the second sealing sleeve 254 are both made of water-absorbing expansion resin materials, and can expand after absorbing water, after the first sealing sleeve 252 expands, the first sealing sleeve 2561 is pressed, at the moment, the resistance value detected by the first sensor 2561 changes, namely, increases, the controller 259 can judge that the first sealing sleeve 252 has water inflow according to the resistance change condition detected by the first sensor 2561, after the first sealing sleeve 252 has water inflow, for the purpose of leakage prevention, an adjusting component 257 is arranged, the clamping force of the fastening ring 251 is increased through the adjusting component 257, wherein, after the controller 259 judges that the first sealing sleeve 252 has water inflow, the current on the electromagnetic coil of the electromagnet 2571 is opened or increased, the electromagnet 2571 has magnetic attraction or the magnetic attraction is increased, and under the mutual attraction of the electromagnet 2571 and the permanent magnet 2572, the distance between the first fastening section 2511 and the second fastening section 2512 is reduced, so that the sealing performance between the first sealing sleeve 252 and the valve rod 13 is improved; when the resistance detected by the second sensor 2562 increases, it indicates that water also enters the second sealing sleeve 254, and indicates that water flows from the upper bottom surface of the seat body 21 to the second sealing sleeve 254, so that the water can be found and processed in time, and the controller 259 can control the alarm 258 to emit an alarm sound, and prompt is performed through the alarm sound.
The present invention also provides a control method for the controller 259, which comprises the following steps,
when the ball valve leaks under the water pressure, water in the valve body 11 can flow into the seat body 21 from the valve rod 13;
in the initial stage, after the first sealing sleeve 252 contacts water, the first sealing sleeve 252 expands, the expanded first sealing sleeve 252 presses the first sensor 2561, the resistance value detected by the first sensor 2561 changes, and at this time, the controller 259 starts current on the electromagnetic coil of the electromagnet 2571, so that the electromagnet 2571 has magnetic attraction and attracts the permanent magnet 2572, and the clamping force of the fastening ring 251 is increased, so that the sealing strength between the sealing ring 135 and the valve rod 13 is improved;
if the resistance value detected by the second sensor 2562 tends to be stable after the time period T, it indicates that the sealing condition of the second sealing sleeve 254 is normal and there is no leakage phenomenon, and at this time, the controller 259 controls the amount of current passing through the electromagnetic coil of the electromagnet 2571 to be kept constant;
if the resistance value detected by the second sensor 2562 changes after the period of time T, it indicates that water seepage occurs in the second sealing sleeve 254, and at this time, the controller 259 gradually increases the current on the electromagnetic coil of the electromagnet 2571; in the process of current increase, if the resistance value detected by the second sensor 2562 increases first and then tends to be stable, it indicates that the water leakage condition is controlled, and at this time, the controller 259 controls the amount of current passing through the electromagnetic coil of the electromagnet 2571 to keep constant; if the resistance value detected by the second sensor 2562 continues to increase during the increase of the current, which indicates that the leakage is difficult to control, the controller 259 controls the alarm 258 to sound an alarm.
Because the sensor is a sensitive element, in order to avoid that the second sealing sleeve 254 has a weak extrusion force on the second sensor 2562 while the suction force of the electromagnet 2571 is adjusted, the extrusion force may cause a resistance value detected by the second sensor 2562 to fluctuate, the interference fluctuation may cause the controller 259 to control the current of the electromagnetic coil on the electromagnet 2571 to continuously increase, which may cause inaccurate detection, a notch is formed on the inner wall of the second framework sleeve 255, the second sensor 2562 is arranged in the notch, a polymer water-absorbent resin sheet 2551 abutting against the second sensor 2562 is further arranged in the notch, a barrier net 2552 is covered on the port of the annular notch, a water diversion bar 2553 which penetrates through the meshes on the barrier net 2552 and is connected with the second sealing sleeve 254 is further arranged on the polymer water-absorbent resin sheet 2551, after water enters the second sealing sleeve 254, water can be guided to the polymer water-absorbent resin sheet 2551 through the water diversion bar 2553, thereby causing a change in the resistance value detected by the second sensor 2562, and the second sensor 2562 is configured in the above manner to effectively solve the error problem.
In order to detect the valve rod 13 in multiple directions, a plurality of first sensors 2561 and second sensors 2562 may be provided, and may be respectively disposed around the first skeleton sleeve 253 and the second skeleton sleeve 255.
As shown in fig. 1, the inner wall of the lower port of the sealing tube 14 of the present invention is provided with a radially inward disposed limiting groove, the limiting groove is divided into a first ring groove and a second ring groove, and the inner diameter of the first ring groove is larger than the inner diameter of the second ring groove, the valve rod 13 is provided with a single-end-face mechanical sealing element 132 located in the second ring groove, the valve rod 13 is further provided with a first limiting portion 133 located in the second ring groove and limiting the single-end-face mechanical sealing element 132, and a second limiting portion 134 located in the first ring groove and abutting against the first limiting portion 133, so as to improve the sealing strength between the valve rod 13 and the sealing tube 14.
Optimally, in order to further improve the sealing strength between the valve rod 13 and the sealing pipe 14, an annular assembly groove which is radially and inwards formed in the outer wall of the valve rod 13 is sleeved with a sealing ring 135, the outer wall of which abuts against the inner wall of the sealing pipe 14.
Preferably, in order to facilitate installation of the valve ball 12, the valve body 11 is divided into a first valve body 111 and a second valve body 112, the first valve body 111 is connected with the second valve body 112 by screw threads, the valve ball 12 is located in the first valve body 111, and the sealing pipe 14 is located on the first valve body 111, and the two are of an integral structure.
The above-mentioned embodiments are only preferred embodiments of the present invention, not all embodiments, and other embodiments obtained by those skilled in the art based on the above-mentioned embodiments should also belong to the protection scope of the present invention without any creative effort, so that: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The utility model provides a long-life automatically controlled ball valve, includes ball valve body (1) and is used for controlling electrically controlled device (2) of ball valve body (1), ball valve body (1) including being cavity pipy valve body (11), set up valve ball (12) and one end in valve body (11) and set up on valve ball (12) and the other end runs through valve rod (13) of valve body (11), valve rod (13) are passed the one end of valve body (11) with electrically controlled device (2) link to each other, electrically controlled device (2) are through control the rotation of valve rod (13), in order to control valve ball (12) are in position in valve body (11), will the both ends mouth of valve body (11) cuts off or feeds through, its characterized in that: a sealing pipe (14) is arranged on the outer wall of the valve body (11), the valve rod (13) penetrates through the valve body (11) and then is movably and hermetically connected with the sealing pipe (14), the electric control device (2) comprises a seat body (21) with an upper port and a lower port, a motor (22) and a speed reducer (23) which are arranged in the seat body (21), the motor (22) is connected with the reducer (23), the upper end of the sealing pipe (14) is connected with the lower port of the valve body (11), the valve body (11) extends into the seat body (21) from the lower port of the seat body (21) and then is connected with the speed reducer (23), the electric control device (2) also comprises a sealing cover (24) which covers the upper port of the valve body (11), and an anti-seepage device (25) which is positioned in the valve body (11) and is used for preventing water from leaking into the seat body (21) through the valve rod (13).
2. A long life electrically controlled ball valve as claimed in claim 1, wherein: a limiting ring (131) is arranged at one end of the valve rod (13) in the seat body (21), the anti-seepage device (25) comprises a fastening ring (251) sleeved on the valve rod (13), the upper end of the fastening ring (251) is abutted against the limiting ring (131), and the lower end of the fastening ring is abutted against an inner port of a lower port of the valve body (11) so as to seal the valve rod (13).
3. A long life electrically controlled ball valve as claimed in claim 2, wherein: the inner wall of the fastening ring (251) is provided with a sealing sleeve, the inner wall of the sealing sleeve abuts against the outer wall of the valve rod (13), and the upper end and the lower end of the sealing sleeve respectively abut against the inner ports of the lower ports of the limiting ring (131) and the valve body (11).
4. A long life electrically controlled ball valve as claimed in claim 3, wherein: the sealing sleeve is of a composite structure and sequentially comprises a first sealing sleeve (252), a first framework sleeve (253), a second sealing sleeve (254) and a second framework sleeve (255) from inside to outside, the inner wall of the first sealing sleeve (252) abuts against the outer wall of the valve rod (13), the outer wall of the second framework sleeve (255) abuts against the inner wall of the fastening ring (251), the first sealing sleeve (252) and the second sealing sleeve (254) are made of water-absorbent expansion resin materials and can expand after absorbing water, the first framework sleeve (253) and the second framework are made of metal materials and are respectively provided with an opening, the sealing sleeves are extruded, and the openings can be retracted; the fastening ring (251) consists of a first fastening section (2511) and a second fastening section (2512) which are in a semi-annular shape, the first fastening section (2511) is hinged with one end of the second fastening section (2512), the other ends of the first fastening section (2511) and the second fastening section (2512) are respectively provided with an ear plate (2513), the ear plate (2513) of the first fastening section (2511) is provided with a plug pin (2514), the ear plate (2513) of the second fastening section (2512) is provided with a slot (2515) for the plug pin (2514) to be embedded in, and the anti-seepage device (25) further comprises a leak detection component (256) for detecting the moisture on the surface of the sealing sleeve, an adjusting component (257) for controlling the distance between the ear plates (2513) of the first fastening section (2511) and the ear plates (2513) of the second fastening section (2512), an alarm (258) and a controller (259);
the leak detection component (256) comprises a first sensor (2561) arranged between the first sealing sleeve (252) and a first framework sleeve (253) and a second sensor (2562) arranged between the second sealing sleeve (254) and a second framework;
the adjusting component (257) comprises an electromagnet (2571) arranged on an ear plate (2513) of the first fastening section (2511) and a permanent magnet (2572) which is arranged on the ear plate (2513) of the second fastening section (2512) and is opposite to the electromagnet (2571);
the first sensor (2561) and the second sensor (2562) are each a resistance strain gauge pressure sensor, the first sensor (2561) and the second sensor (2562) sending detected signals to the controller (259); according to a signal sent by the first sensor (2561), after the controller (259) judges that the first sealing sleeve (252) enters water according to the detected resistance change situation, the electromagnet (2571) is enabled to have magnetic attraction or increase the magnetic attraction by starting or increasing the current on the electromagnetic coil of the electromagnet (2571), and the distance between the lug plate (2513) of the first fastening section (2511) and the lug plate (2513) of the second fastening section (2512) is reduced under the mutual attraction of the electromagnet (2571) and the permanent magnet (2572); through the signal sent by the second sensor (2562), the controller (259) controls the alarm (258) to give an alarm according to the detected resistance change condition after judging that the second sealing sleeve (254) is filled with water.
5. A long life electrically controlled ball valve as claimed in claim 4, wherein: the controller (259) is controlled in the following manner,
when the ball valve leaks under the water pressure, water in the valve body (11) flows into the seat body (21) from the valve rod (13);
in the initial stage, after the first sealing sleeve (252) is contacted with water, the first sealing sleeve is expanded, the expanded first sealing sleeve (252) can extrude the first sensor (2561), the resistance value detected by the first sensor (2561) can be changed, at the moment, the controller (259) starts the current on the electromagnetic coil of the electromagnet (2571), so that the electromagnet (2571) has magnetic attraction and attracts the permanent magnet (2572), and the clamping force of the fastening ring (251) is increased, so that the sealing strength of the sealing ring (135) and the valve rod (13) is improved;
if the resistance value detected by the second sensor (2562) tends to be stable after the T time period, the sealing condition of the second sealing sleeve (254) is normal, no leakage phenomenon exists, and the controller (259) controls the current quantity on the electromagnetic coil of the electromagnet (2571) to be kept constant;
if the resistance value detected by the second sensor (2562) changes after the T time period, the second sealing sleeve (254) is indicated to be seeped, and the controller (259) gradually increases the current on the electromagnetic coil of the electromagnet (2571); in the process of current increase, if the resistance value detected by the second sensor (2562) is increased and then tends to be stable, the water leakage condition is controlled, and the controller (259) controls the current amount on the electromagnetic coil of the electromagnet (2571) to be kept constant; when the resistance value detected by the second sensor (2562) continuously increases during the current increase, the liquid leakage condition is difficult to control, and the controller (259) controls the alarm (258) to give an alarm sound.
6. A long life electrically controlled ball valve as claimed in claim 1, wherein: there is the spacing groove of radial inside setting on the lower port inner wall of sealing tube (14), the spacing groove divide into first annular and second annular, just the internal diameter of first annular is greater than the internal diameter of second annular, be provided with on valve rod (13) and be located single terminal surface mechanical seal (132) of second annular, still be provided with on valve rod (13) and be located in the second annular and right single terminal surface mechanical seal (132) carry out spacing first spacing portion (133), and be located in the first annular and support spacing portion (134) of second tightly on first spacing portion (133).
7. A long life electrically controlled ball valve as claimed in claim 6, wherein: the outer wall of the valve rod (13) is provided with an annular assembling groove which is radially and inwards opened, and a sealing ring (135) of which the outer wall is tightly propped against the inner wall of the sealing pipe (14) is sleeved in the annular assembling groove.
8. A long life electrically controlled ball valve as claimed in claim 1, wherein: valve body (11) divide into first valve body (111) and second valve body (112), first valve body (111) with second valve body (112) threaded connection, valve ball (12) are located in first valve body (111), sealing tube (14) are located on first valve body (111), and the two structure as an organic whole.
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| CN202010978987.XA CN112013127B (en) | 2020-09-17 | 2020-09-17 | Long-life automatically controlled ball valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010978987.XA CN112013127B (en) | 2020-09-17 | 2020-09-17 | Long-life automatically controlled ball valve |
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| CN112013127A true CN112013127A (en) | 2020-12-01 |
| CN112013127B CN112013127B (en) | 2022-01-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265892A (en) * | 2021-07-19 | 2021-08-17 | 南通高隆纺织科技有限公司 | Flax rope stranding and pressing anti-loosening equipment |
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|---|---|
| CN112013127B (en) | 2022-01-25 |
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Denomination of invention: A Long Life Electric Control Ball Valve Effective date of registration: 20230619 Granted publication date: 20220125 Pledgee: Taizhou Yuhuan sub branch of Zhejiang Tailong Commercial Bank Co.,Ltd. Pledgor: Yuhuan sankutang Valve Co.,Ltd. Registration number: Y2023980044482 |