CN109555883B - Electric adjustable dynamic balance valve - Google Patents
Electric adjustable dynamic balance valve Download PDFInfo
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- CN109555883B CN109555883B CN201810744280.5A CN201810744280A CN109555883B CN 109555883 B CN109555883 B CN 109555883B CN 201810744280 A CN201810744280 A CN 201810744280A CN 109555883 B CN109555883 B CN 109555883B
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/003—Safety valves; Equalising valves, e.g. pressure relief valves reacting to pressure and temperature
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to an electric adjustable dynamic balance valve, which comprises a valve body and an electric controller used for operating the valve body, wherein an output shaft of the electric controller is connected with an input shaft of the valve body, the valve body comprises a valve body and a valve rod, the valve body is provided with a valve cavity, a valve water inlet and a valve water outlet which are communicated with the valve cavity, an elastic or flexible sealing element is arranged in the valve cavity, the valve cavity is divided into an upper cavity and a lower cavity which are not directly communicated with each other by the sealing element, a cup-shaped valve core is arranged in the lower cavity, a water outlet hole of the valve core cavity is arranged on the side wall of the valve core, at least part of the inner side opening of the valve core is located in a variable shielding area below the sealing element, and the. The invention is suitable for remote control and operation, and can automatically change the flow setting according to the change of the medium temperature so as to better keep the stability of the heat supply.
Description
Technical Field
The invention relates to a balance valve, in particular to an electric dynamic balance valve with adjustable flow.
Background
The balance valve is a valve which plays a role in balance regulation under the hydraulic working condition, and comprises a static balance valve, a dynamic balance valve and other forms, wherein the dynamic balance valve mainly refers to a dynamic differential pressure balance valve which automatically changes resistance and flow according to the change of the system working condition (differential pressure), the flow passing through can be effectively controlled to keep a constant value within a certain differential pressure range, when the differential pressure before and after the valve is increased, the flow can be kept not to be increased through the action of automatically closing the valve, when the differential pressure is reduced, the valve is automatically opened to be large, the flow is still kept to be constant, and therefore the differential pressure can be kept to be basically constant when the working condition is changed. The dynamic balance valve is arranged in the heat supply and air conditioning pipe network, and the preset flow of each distribution point (such as each floor) in the system can be adjusted, so that the total flow of the heating system is reasonably distributed, and the problem of distributing the flow of each branch is effectively solved.
However, the existing dynamic balance valve still has certain defects, and for the application in a heating system, the dynamic balance valve mainly comprises: 1) the opening setting adopts manual operation, when the flow of each balance valve is set, the flow needs to be adjusted one by one from the field by manpower, the measurement of the actual flow is troublesome when the flow is adjusted on the field, the opening of the balance valve is usually determined according to the personal experience of an operator, or the opening of the balance valve is determined through simple field flow measurement, because the number of branches and balance valves related to the system is large, the change of any branch brings change to the system, the adjustment needs to be carried out for two times or even more, time is consumed, and the application of the existing computer management technology is not facilitated; 2) in consideration of the balance and stability of the medium flow rate, the heating system is more important in terms of the heating flow rate, and therefore, the influence of the medium temperature needs to be taken into consideration, and when the medium temperature changes, the flow rate should be automatically adjusted so as to keep the heating amount in balance.
Disclosure of Invention
In order to solve the technical problem, the invention provides an electric adjustable dynamic balance valve which is suitable for remote control and operation and can automatically change flow setting according to the change of medium temperature so as to better keep the stability of heat supply.
The technical scheme for realizing the aim of the invention is as follows: an electric adjustable dynamic balance valve comprises a valve body and an electric controller used for operating the valve body, wherein an output shaft of the electric controller is connected with an input shaft of the valve body, the valve body comprises a valve body and a valve rod, the valve body is provided with a valve cavity, a valve water inlet and a valve water outlet which are communicated with the valve cavity, an upper cover capable of sealing a valve core mounting port is fixedly installed on a valve core mounting port of the valve body, an elastic or flexible sealing element is arranged in the valve cavity, the valve cavity is divided into an upper cavity and a lower cavity which are not directly communicated with each other by the sealing element, the peripheral edge of the sealing element is connected with the wall of the valve cavity, the valve rod penetrates through a valve rod hole of the upper cover and a valve rod hole of the sealing element, the valve rod is rotatably connected with the upper cover and is fixedly connected or slidably connected with the sealing element, the valve core is provided with a valve core cavity which forms a medium flow channel between a valve water inlet and a valve water outlet, the top of the valve core is open, the valve core cavity is communicated with the valve water inlet through a valve core cavity water inlet channel and is communicated with the valve water outlet through a valve core cavity water outlet hole, the valve core cavity water outlet hole is arranged on the side wall of the valve core, at least part of the area of the inner side opening of the valve core cavity is positioned in a variable shielding area below the sealing element, the lower part of the valve rod is positioned in the valve core cavity and is in threaded connection with a valve clack, the valve clack is provided with a central screw hole which is in threaded connection with the valve rod, the bottom of the valve clack is provided with an annular valve clack sealing surface, a valve seat is arranged below the valve clack, the valve seat is provided with a valve seat sealing surface which is matched with the sealing surface, the valve rod hole water inlet is located at the bottom end of the valve rod and communicated with the valve core cavity water inlet channel, and the valve rod hole water outlet is located at the upper portion of the valve rod and communicated with the upper cavity.
Preferably, the valve flap comprises a valve flap base body and a temperature control body, the thermal expansion coefficient of the temperature control body is greater than that of the valve flap base body, the temperature control body is positioned below the valve flap base body and fixedly connected with the valve flap base body, a valve flap sealing member is fixedly connected below the temperature control body, the valve flap sealing surface is arranged on the lower surface of the valve flap sealing member, a central screw hole of the valve flap axially penetrates through the valve flap base body, the temperature control body and the valve flap sealing member, an internal thread of the valve rod is arranged on the valve flap base body, no thread is arranged on the temperature control body and the valve flap sealing member, and the hole diameter of the temperature control body and the valve flap sealing member is greater than the outer diameter of the corresponding part of the valve rod (the region capable of extending into the temperature control body and the valve.
Preferably, the bottom of the valve core is provided with a cylindrical annular boss extending upwards, the annular boss forms the valve seat, a central through hole penetrates through the bottom of the valve core and is communicated with a valve body bottom cavity positioned below the valve core, the valve body bottom cavity is formed by grooves in corresponding positions on the valve body and forms a part of a water inlet channel of the valve core cavity, the water inlet channel is communicated with an inlet of the valve body through any suitable medium channel such as a hole penetrating through the valve body or a groove arranged on the inner wall of the valve body, the lower end of the valve rod extends into the annular boss, and the flow set value is adjusted by adjusting the distance between the valve clack and the annular boss.
Preferably, the sealing element is an elastic sheet in a shape of a rotational curved surface, the longitudinal section of the sealing element is approximately in a W shape with smooth corners, a stem hole capable of penetrating through a stem is formed in the central portion of the sealing element, an annular convex part in a downward convex shape is formed between the stem hole and the peripheral edge of the sealing element, the peripheral edge of the sealing element is fixed at the top end port of the valve core, the annular convex part is located in the valve core, the radial outer side surface of the annular convex part is adjacent to the inner wall of the valve core, and the water outlet of the valve core cavity is located on the radial outer side of.
Preferably, the upper portion of the valve rod is provided with a polished rod section, the lower portion of the valve rod is provided with an external thread section, the valve rod is in sliding connection with the sealing element through a sliding element, the sliding element is provided with a vertical central through hole, is sleeved on the polished rod section on the upper portion of the valve rod through the central through hole and is in clearance fit with the polished rod section, an annular groove is formed in the outer side face of the upper portion of the sliding element, and the edge portion of a valve rod hole of the sealing element is embedded in the annular groove of the sliding element.
Preferably, the lower part of the sliding element is provided with an inner concave upper spring mounting seat, the upper part of the valve clack (the upper part of the valve clack base body) is provided with an inner concave lower spring mounting seat, a spiral spring used as a return spring is installed between the sliding element and the valve clack, the spiral spring is sleeved on the valve rod, the upper end of the spiral spring is installed on the upper spring mounting seat, and the lower end of the spiral spring is installed on the lower spring mounting seat.
Preferably, a horizontally arranged valve cavity sealing ring is arranged between the inner wall of the valve cavity and the outer wall of the valve core, and the valve water inlet and the valve water outlet are respectively positioned at the upper side and the lower side of the valve cavity sealing ring.
Preferably, the upper end of the valve rod is coaxially connected with the lower end of an input shaft of the valve body, the input shaft is provided with an external thread or is fixedly sleeved with an external thread sleeve with an external thread, the input shaft or the external thread sleeve is in threaded connection with a pointer sleeve with an internal thread, the pointer sleeve is provided with a pointer extending outwards in the radial direction, the upper cover is fixedly provided with a cylindrical scale cover, the side wall of the scale cover is provided with a vertical long-strip-shaped pointer through hole, the pointer is inserted into the pointer through hole, and the outer end of the pointer is located outside the pointer through hole or in the pointer through hole.
Preferably, the top of the external thread sleeve is an expanding section, an annular groove is formed between the inner wall of the external thread sleeve and the top of the input shaft, a blocking cover is buckled on the annular groove between the top of the external thread sleeve and the top of the input shaft, the top of the input shaft is located in the blocking cover, and the height of the top end of the scale cover is not lower than that of the top end of the external thread sleeve.
Preferably, the valve body is further provided with a valve inlet side measuring port and a valve outlet side measuring port, the valve inlet side measuring port is communicated with the valve water inlet or the valve core cavity water inlet channel, the valve outlet side measuring port is communicated with the valve core cavity or the valve water outlet, the valve inlet side measuring port and the valve outlet side measuring port are respectively provided with a valve outlet side pressure measuring meter and a valve outlet side pressure measuring meter, the output of the valve outlet side pressure measuring meter and the output of the valve outlet side pressure measuring meter are sent to a local control device and/or a remote control system in a wired and/or wireless communication mode, the control output of the remote control system and/or the local control device is connected to the control circuit of the electric controller in a wireless and/or wired mode, when a wireless communication mode is required, can realize through setting up wireless communication module, when needs adopt wired communication mode, can set up wired output/output binding post and connect relevant communication cable.
The invention has the beneficial effects that: because the sealing element is arranged and at least part of the area of the inner side of the water outlet hole of the valve core cavity is positioned in the variable shielding area below the sealing element, a medium at the inlet side is directly introduced into the upper cavity through the valve rod hole, when pressure difference fluctuation occurs at two ends of the valve, the sealing element automatically changes the shape and the position under the action of the pressure difference of the upper cavity and the lower cavity, and the size of the water outlet hole of the valve core cavity blocked or sealed by the sealing element is adjusted, so that the resistance of the valve is effectively changed, the flow fluctuation caused by the pressure difference is counteracted, the area of the sealing element basically covers the whole area of the cross section of the valve core cavity, and the material selection and the shape design of the sealing element can be used, so that the reaction sensitivity is further improved, the; the work of the electric controller can be controlled by adopting the existing remote control technology and network communication technology, the valve rod is driven to rotate by the electric controller, the remote flow setting and adjustment are realized, an operator does not need to go to the site, the use is greatly convenient, particularly, the existing computer operation capacity and control technology can be utilized, the balance operation of the whole network is realized, the due opening setting value of each balance valve in the corresponding system state is calculated according to the data of the whole network, the remote synchronous or cooperative adjustment is realized, the one-time adjustment is in place, and the repeated debugging is not needed; because the valve clack and the valve seat which are distributed up and down are arranged to form the valve clack and the valve seat, and the sealing surfaces which are matched with each other are arranged, the valve clack and the valve seat can be turned off and opened simultaneously under the condition of realizing flow regulation and balance, an independent turn-off valve does not need to be additionally arranged, the dual-purpose effect of one valve is achieved, the system cost is saved, and the maintenance and the use are convenient.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic view of a valve sealing pair (valve flap and valve seat) according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the valve body of the electrically adjustable dynamic balance valve provided by the present invention includes a valve body 14 and a valve rod 6, an electric controller 1 is installed on the valve body, an output shaft of the electric controller is connected to an input shaft 2 of the valve body, and the valve rod is driven by the input shaft to control the off state and the opening degree of the valve.
The valve body is provided with a valve cavity, a valve water inlet 16 and a valve water outlet 7 which are communicated with the valve cavity, an upper cover 5 which can seal a valve core mounting port is fixedly arranged on the valve core mounting port of the valve body, an elastic or flexible sealing element 19 is arranged in the valve cavity, the valve cavity is divided into an upper cavity 22 and a lower cavity 15 which are not directly communicated with each other by the sealing element, the peripheral edge of the sealing element is connected with the cavity wall of the valve cavity, the valve rod passes through a valve rod hole of the upper cover and a valve rod hole of the sealing element, is rotatably connected with the upper cover and is fixedly connected or slidably connected with the sealing element (a movable connection mode which allows the sealing element at the connection part to axially slide relative to the valve rod), a valve core 9 is arranged in the lower cavity, the valve core can be a piece which is usually independent of the valve body so as to be processed and manufactured, the valve core is provided with a valve core cavity which forms a medium flow channel between the valve water inlet and the valve water outlet, the top of the valve core is open, the valve core cavity is communicated with the valve water inlet through a valve core cavity water inlet channel (a water inlet side cavity and/or a channel of a valve sealing pair), the valve water outlet is communicated with the valve water outlet through a valve core cavity water outlet 8, the valve core cavity water outlet is arranged on the side wall of the valve core, at least part of the area of the inner side opening of the valve core cavity is positioned in a variable shielding area (an area which can be shielded by a sealing element and the shielding degree of the area is changed according to the change of the sealing element), the shielding comprises various shielding and/or covering situations which influence resistance and flow, for example, the resistance is increased due to the approach to influence on the flow, the lower part of the valve rod is positioned in the valve core cavity and is in, because the valve clack can reciprocate when the valve rod rotates, can be equipped with the limit structure who is used for injecing it only can reciprocate around, can adopt the prior art that suits wantonly to valve clack and supporting disk seat constitution are used for the flow to set for and the valve seal of shutoff is vice, realizes settlement or the regulation to the flow set point through reciprocating of valve clack, the direction of setting up of disk seat can be various suitable directions, for example can adopt the disk seat of plane setting, also can adopt the disk seat that the inclined plane (has certain angle with the horizontal plane) set up, can also adopt special-shaped valve seat (non-planar disk seat).
The valve rod is internally provided with an axial valve rod hole, a valve rod hole water inlet and a valve rod hole water outlet, the valve rod hole water inlet is communicated with the valve core cavity water inlet channel (for example, directly positioned in the valve core water inlet channel or communicated with the valve core water inlet channel through a related connecting channel), the valve rod hole water outlet is communicated with the upper cavity (for example, directly positioned in the upper cavity or communicated with the upper cavity through a related connecting channel), therefore, water in the valve core cavity water inlet channel can directly enter the upper cavity through the valve rod hole without being blocked by a valve sealing pair and a sealing element, when the pressure difference between the valve water inlet side and the valve water outlet side is increased due to the pressure increase of a valve water inlet side pipeline and/or the pressure decrease of a valve water outlet side pipeline, the pressure difference between the upper side and the lower side of the sealing element (namely the pressure difference between the upper cavity and the lower cavity, depending on the deformation of the sealing element and/or the displacement caused by the downward sliding of the sealing element relative to the valve rod, the main body part of the sealing element extends and/or moves downwards to shield the water outlet hole of the valve core cavity or increase the shielding degree of the water outlet hole of the valve core cavity so as to offset the flow increase caused by the increase of the pressure difference, otherwise, when the pressure difference between the water inlet side and the water outlet side of the valve is reduced due to the pressure drop of the pipeline at the water inlet side of the valve and/or the pressure rise of the pipeline at the water outlet side of the valve, the pressure difference between the upper side and the lower side of the sealing element is reduced, and the main body part of the sealing element contracts and/or moves upwards under the action of the elastic force recovery of the sealing element and/or the action of a return spring 10 matched with the sliding connection of the sealing element on the valve rod, the flow reduction caused by the pressure difference becoming smaller is counteracted, so that the automatic flow stabilization and balance under the pressure fluctuation are realized, and the relevant structures and parameters can be verified, obtained or optimized through theoretical calculation and/or experiments according to the prior art, so as to obtain better flow stabilization and balance effects.
The water outlet holes of the core cavity are preferably in a shape with a narrow top and a wide bottom, such as a triangle or a sunflower seed shape, and the number of the water outlet holes is multiple and the water outlet holes are distributed at the same height position. Because at least the outer edge of the sealing element is fixed on the inner wall of the valve body, under the same pressure difference increment, the position is more downward, the increment movement amplitude is smaller, the shielding or obstructing distance to the water outlet hole of the core cavity in the axial direction is smaller, and the negative influence on the shielding effect due to the fact that the water outlet hole of the core cavity is narrow at the top and wide at the bottom can be effectively counteracted by arranging the water outlet hole of the core cavity into a shape with the narrow top and the wide bottom.
Referring to fig. 2, the flap may comprise a flap base 11.1 and a temperature-controlled body 11.2, the coefficient of thermal expansion of which is greater than that of the flap base, the temperature-controlled body being located below the flap base, is fixedly connected with the valve clack base body, a valve clack sealing element 11.3 is fixedly connected below the temperature control body, the valve clack sealing surface is arranged on the lower surface of the valve clack sealing element, the valve clack is in a multi-section cylindrical shape with unequal diameters on the whole, the central screw hole penetrates the whole valve clack and is positioned on the axis of the valve clack, the internal thread matched with the thread of the valve rod is only arranged at the lower part of the valve clack base body, the axial length of the valve body is in accordance with the requirements of transmission and stability, the temperature control body and the valve clack sealing element are not provided with threads, and the aperture is larger than the outer diameter of the corresponding part of the valve rod (the area which can extend into the temperature control body and the valve clack sealing element) so as to facilitate the penetration and the penetration of the valve rod. Under the condition of meeting the strength requirement, a solid (except a central through hole) structure can be adopted, and a bracket structure or a partially hollow structure can also be adopted.
Because the valve clack base body, the valve core, the valve body, the valve rod and the like are usually made of the same or similar metal materials with the same or similar thermal expansion coefficients (different but not substantially influenced), the thermal expansion degree of the temperature control body is larger than that of the valve body, the valve core and the like. The ratio of the thermal expansion coefficients of the different parts is proper, so that after the temperature rises, the axial expansion amount of the temperature control body is obviously larger than the total axial expansion amount of the valve body and the valve core, under the condition that the position of the valve clack base body relative to the valve rod is not changed, the temperature control body expands downwards relative to the valve rod, the distance between the valve clack sealing surface and the valve seat sealing surface is reduced, the resistance is increased, the flow is reduced, when the medium temperature is reduced, the contraction degree of the temperature control body is larger than the total contraction degree of the valve, the distance between the valve clack sealing surface and the valve seat sealing surface is increased, the flow is increased, the thermal expansion coefficient of the temperature control body to be adopted for flow regulation when the medium temperature changes can be calculated according to the requirement of the heat supply temperature, and any suitable existing material is.
The valve rod sealing element can adopt an annular rubber (or other elastic material) sealing gasket to adapt to the use requirement of a heating system, and can also be provided with a hard sealing element to carry out hard sealing and closing through a hard sealing surface of the valve seat so as to adapt to the use requirement under the condition of large flow.
The valve water inlet and the valve water outlet can be both in a tubular shape, and the pipe orifices form medium inflow or inflow channels, and for the sake of simplicity, the medium flow channels can also be directly called as the valve water inlet and the valve water outlet.
The shapes of the end parts of the valve water inlet and the valve water outlet can be regular hexagonal prism or regular quadrangular suitable for being operated by a wrench, and internal threads can be arranged in the pipe hole so as to facilitate pipeline connection.
The sealing element can adopt any suitable shape as long as the sealing element is enabled to expand and/or move towards the water outlet of the valve core cavity under the action of the pressures on the upper side and the lower side of the sealing element. For example, the sealing unit may be a downwardly convex spherical crown shape, the inlet of the water outlet of the valve core chamber is arranged in the direction of the convex spherical crown shape, and the spherical crown is enabled to approach and/or shield the inner side opening of the water outlet of the valve core chamber within a certain pressure difference change range due to pressure expansion and/or movement.
Preferably, the sealing element is an elastic sheet in a shape of a rotational curved surface, the longitudinal section of the sealing element is approximately in a W shape with smooth corners (the basic outline is) and the central portion of the sealing element is provided with a valve rod hole capable of passing through a valve rod, an annular convex part in a lower convex shape is arranged between the valve rod hole and the peripheral edge of the sealing element, the peripheral edge of the sealing element is fixed at the top port of the valve core, a relevant part (such as an upper cover) can be generally adopted to clamp the peripheral edge of the sealing element between the end face of the lower end of the sealing element and the end face of the port at the upper end of the valve core (see fig. 1) so as to realize the connection and the fixation of the peripheral portion of the sealing element, the annular convex part of the sealing element is positioned in the valve core, the radial outer side surface of the annular convex part is adjacent to the inner wall of the, when the pressure difference between the upper side and the lower side of the sealing element is increased, the annular convex part of the sealing element expands downwards (axially downwards) and outwards (radially outwards), the distance between the annular convex part and the inner wall of the valve core is reduced, even a part of area is directly attached to the inner wall of the valve core, and the shielding degree of the water outlet of the valve core cavity is increased, so that the resistance to the medium flow is increased, when the sealing element is in sliding connection with the valve rod, the sealing element can move downwards from the central part, further the annular convex part is driven to move downwards and outwards to a certain extent, the shielding degree of the water outlet of the valve core cavity is further increased, the material characteristics, the specific shape, the size, the setting position and the like of the sealing element are properly selected or optimized, and the influence degree and the influence change law on the medium flow resistance when the pipeline pressure on the water inlet side and the water outlet side of the valve, so that the influence caused by the change of the pressure difference can be just counteracted.
The upper part of the valve rod can be provided with a polished rod section, the lower part of the valve rod can be provided with an external thread section, the valve rod is in sliding connection with the sealing element through a sliding element 21, the sliding element is provided with a vertical central through hole and is sleeved on the polished rod section at the upper part of the valve rod through the central through hole and is in clearance fit with the polished rod section, an annular groove is arranged on the outer side surface of the upper part of the sliding element, the edge part of a valve rod hole of the sealing element is embedded in the annular groove of the sliding element, the outer side surface of the lower part of the sliding element is preferably in a frustum shape with a large lower part and a small upper part, and the height of the lower end is not higher than that of the lower end of the annular convex part of the sealing element, so that the annular convex part of the sealing element is extruded or limited in the annular gap between the outer side surface of the annular convex part and, and when the annular convex part is pressed and expanded, the inner wall of the valve core is more effectively and reliably pressed and extruded, the water outlet hole of the valve core cavity is effectively shielded, and the sensitivity and the reliability of automatic balance are improved.
The lower part of the sliding element is provided with an inward concave upper spring mounting seat, the upper spring mounting seat is preferably in a cup shape with a downward opening, the upper part of the valve clack is provided with an inward concave lower spring mounting seat, the lower spring mounting seat is preferably in a cup shape with an opening facing, the sliding element and the valve clack are provided with a spiral spring used as a return spring therebetween, the spiral spring is sleeved on the valve rod, the upper end of the spiral spring is mounted on the upper spring mounting seat, the lower end of the spiral spring is mounted on the lower spring mounting seat, when the sealing element moves downwards under the action of pressure difference between the upper side and the lower side, the sliding element is driven to move downwards to compress the return spring and balance the pressure balance point, and when the pressure difference between the upper side and the lower side of the sealing element is reduced, the sliding element moves upwards under the pushing of.
Preferably, the valve flap is located above the valve seat, and cooperates with a sealing surface of the valve seat to form a valve sealing pair capable of setting and adjusting flow and performing turn-off control, and mutually-fitted sealing surfaces may be provided on the bottom of the valve flap and the valve seat, and the specific setting and adjusting manner of the flow is to change the vertical position of the valve flap by rotating the valve rod, and further change the gap (or called interval) between the valve flap and the sealing surface of the valve seat, and change the opening degree of the valve sealing pair, and the up-down movement range of the valve flap can be set as required, when the valve flap is raised, the interval between the valve flap and the valve seat is increased, and the resistance to medium flow is decreased, i.e., a larger flow setting value can be formed, otherwise, when the valve flap is lowered, the interval between the valve flap and the valve seat is decreased.
After the valve aperture is set, if the medium temperature rises, the relative expansion of the temperature control body reduces the distance between the valve clack and the valve seat, the flow is reduced, if the medium temperature falls, the relative contraction of the temperature control body increases the distance between the valve clack and the valve seat, the flow is increased, thereby offsetting or compensating the heat supply change caused by the medium temperature change, and being beneficial to maintaining the stability of the heat supply.
When the sealing element is connected with the valve rod in a sliding mode through the sliding element and the corresponding return spring is arranged between the sliding element and the valve clack, the lower end of the return spring is driven to move together due to the fact that the valve clack moves up and down, the sliding element is pushed, the central portion of the sealing element is driven to move in the same direction, new pressure balance is achieved, relevant resistance formed by the sealing element and relevant resistance formed by the valve clack change in the same direction, and therefore the adjusting effect is enlarged, and adjusting is enabled to be faster and faster.
The valve rod may be tubular (including a section of the valve rod is tubular), a pipe hole of the valve rod forms the valve rod hole, an upper port of the valve rod hole forms the valve rod hole water outlet, a lower port of the valve rod hole forms the valve rod hole water inlet, the bottom of the valve core is provided with a cylindrical annular boss 12 extending upwards, the annular boss is used as a valve seat, a central through hole of the annular boss penetrates through the bottom of the valve core (or the bottom of the valve core is provided with a through hole which is connected with the central through hole of the annular boss to form the same through hole), and the valve rod is communicated with the valve water inlet through a connecting channel (for example, a connecting hole and/or a connecting groove for realizing the communication are arranged. The inner wall of the valve body can be provided with a groove 13 positioned below the through hole of the annular boss, the groove forms a bottom cavity of the valve and is used for realizing the stabilization of medium flow and the recovery of static pressure, and the bottom cavity can be regarded as a part of a water inlet channel of the valve core cavity. The annular boss is used as a valve seat, the top end face of the annular boss is used as a sealing surface of the valve seat, and therefore the annular boss and the valve clack which is located above the annular boss and moves axially under the driving of the valve rod form a stop valve structure.
The lower extreme of valve rod extends to in the annular boss, from this introduce annular boss central through hole with the water of valve water inlet, and then introduce valve rod hole and epicoele, the bottom diameter of valve clack is not less than the external diameter of annular boss, and will the central through hole of annular boss is used as case chamber inhalant canal, through adjusting valve clack for the interval regulation flow set value of annular boss, can also set up to the polished rod under the valve rod that will insert in the annular boss to be equipped with the rotatory limit structure of valve rod in the annular boss, with the realization to the rotational positioning of tip under the valve rod, improve the rotatory stability of valve rod.
A valve cavity sealing ring which is horizontally arranged can be arranged between the inner wall of the valve cavity and the outer wall of the valve core, the valve water inlet and the valve water outlet are respectively positioned at the upper side and the lower side of the valve cavity sealing ring, so that a medium flow channel of the valve water inlet and the valve water outlet which pass through a gap between the inner wall of the valve cavity and the outer wall of the valve core is cut off by the valve cavity sealing ring, and required sealing rings and the like are also arranged at other parts needing to be sealed according to the sealing requirements.
The upper end of the valve rod is coaxially connected with the lower end of the input shaft, and can be connected in any suitable shaft coupling or shaft-to-shaft connection mode, so that the rotation of the input shaft can drive the valve rod to rotate together.
The input shaft is provided with an external thread or fixedly sleeved with an external thread sleeve 4 with an external thread, the input shaft or the external thread sleeve is in threaded connection with a pointer sleeve 3 with an internal thread, the pointer sleeve is provided with a pointer extending outwards in the radial direction, the upper cover is fixedly provided with a cylindrical scale cover 23, the side wall of the scale cover is provided with a vertical long-strip-shaped pointer through hole, the side of the pointer through hole is provided with scales for indicating the height of the pointer, the pointer is inserted into the pointer through hole, the outer end of the pointer through hole is positioned outside the pointer through hole or in the pointer through hole (including being flush with the outer side surface of the scale cover), the width of the pointer through hole can be slightly larger than the width of the pointer positioned in the pointer through hole so as to allow the pointer to move up and down and limit the pointer to rotate, and when the input shaft rotates, the pointer is then moved up and down and the height of the pointer is positively correlated with the height of the valve flap, thereby indicating the set flow at the corresponding height of the valve flap for display and storage of the height record.
The top of the external thread sleeve is preferably an expanding section, an annular groove is formed between the inner wall of the external thread sleeve and the top of the input shaft, a blocking cover is buckled on the annular groove between the top of the external thread sleeve and the top of the input shaft, the top of the input shaft is positioned in the blocking cover and is preferably in a square or regular hexagon column shape, so that adjustment can be completed conveniently by using tools such as a wrench, the height of the top end of the scale cover is not lower than that of the top end of the external thread sleeve, and therefore the top end of the external thread sleeve is prevented from being exposed.
The valve body can be further provided with a valve inlet side measuring port 17 and a valve outlet side measuring port, the valve inlet side measuring port is communicated with the valve water inlet or the valve core cavity water inlet channel, corresponding pressure is applied to the valve outlet side measuring port communicated with the valve core cavity or the valve water outlet, corresponding pressure measuring meters 18 and 20 are installed on the corresponding measuring ports, the medium pressure of the valve inlet side and the valve outlet side is detected in real time, and the medium pressure is accessed into a remote control system through a wired transmission cable or a wireless communication module and a wireless communication network, so that the remote control system can carry out related monitoring, analysis and control, the control output of the remote control system is sent into a control circuit of the electric controller, the action of a prime motor is controlled, and the state of the control valve is adjusted.
The electric controller can usually adopt an electric motor as a prime motor, is provided with a speed change and transmission mechanism such as a speed reducer and the like, adopts an output shaft of a speed change and transmission cabinet as an output shaft of the speed change and transmission cabinet to realize the driving of the valve rod, adopts any appropriate prior art as a corresponding control circuit, can integrate the prime motor, the control circuit, the speed change and transmission mechanism into a same shell, and installs the shell on the valve body to form an integral balance valve product.
The inner wall of each measuring port is provided with an internal thread for installing a measuring port cover or a measuring device, when relevant measurement is needed, the measuring port cover or the measuring device is installed with the corresponding measuring device, when measurement is not needed, the measuring device can be detached, and the measuring port cover is installed after a sealing gasket is filled to seal the measuring port.
The preferred and optional technical means disclosed in the present invention can be combined arbitrarily to form a plurality of different technical solutions, except for the specific description and the further limitation that one preferred or optional technical means is another technical means.
Claims (9)
1. An electric adjustable dynamic balance valve comprises a valve body and is characterized by further comprising an electric controller used for operating the valve body, wherein an output shaft of the electric controller is connected with an input shaft of the valve body, the valve body comprises a valve body and a valve rod, the valve body is provided with a valve cavity, a valve water inlet and a valve water outlet which are communicated with the valve cavity, an upper cover capable of sealing a valve core mounting opening is fixedly mounted on a valve core mounting opening of the valve body, an elastic or flexible sealing element is arranged in the valve cavity, the valve cavity is divided into an upper cavity and a lower cavity which are not directly communicated with each other by the sealing element, the peripheral edge of the sealing element is connected to the wall of the valve cavity, the valve rod penetrates through a valve rod hole of the upper cover and a valve rod hole of the sealing element, is rotatably connected with the upper cover and is fixedly or slidably connected with, the lower cavity is internally provided with a cup-shaped valve core, the valve core is provided with a valve core cavity which forms a medium flow channel between a valve water inlet and a valve water outlet, the top of the valve core is open, the valve core cavity is communicated with the valve water inlet through a valve core cavity water inlet channel and is communicated with the valve water outlet through a valve core cavity water outlet, the valve core cavity water outlet is arranged on the side wall of the valve core, at least part of the area of the inner side opening of the valve core cavity is positioned in a variable shielding area below the sealing element, the valve core cavity water outlet is in a shape of narrow top and wide bottom and is distributed on the same height position, the lower part of the valve rod is positioned in the valve core cavity and is in threaded connection with a valve clack for flow setting and valve shutoff, the valve clack is provided with a central screw hole for threaded connection with, a valve seat is arranged below the valve clack, the valve seat is provided with a valve seat sealing surface matched with the valve clack sealing surface, the bottom of the valve core is provided with a cylindrical boss extending upwards, the annular boss is used as the valve seat, a central through hole penetrates through the bottom of the valve core and is communicated with the valve water inlet through a connecting channel, the top end surface of the valve core is used as a valve seat sealing surface, the valve seat and the valve clack which is positioned above the valve seat and moves axially under the driving of a valve rod form a stop valve structure, the central through hole of the valve seat is communicated with the valve core cavity water inlet channel, an axial valve rod hole, a valve rod hole water inlet and a valve rod hole water outlet are arranged in the valve rod, the valve rod hole water inlet is positioned at the bottom end of the valve rod and is communicated with the valve core cavity water inlet channel, the valve rod hole, the groove forms a bottom cavity of the valve, is used for realizing the stabilization of medium flow and recovering static pressure, and is a part of a water inlet channel of the valve core cavity.
2. The electrically adjustable dynamic balance valve according to claim 1, wherein the bottom of the valve core is provided with a cylindrical annular boss extending upward, the annular boss forms the valve seat, a central through hole penetrates through the bottom of the valve core and communicates with a valve body bottom cavity located below the valve core, the valve body bottom cavity is formed by a groove at a corresponding position on the valve body and forms a part of the water inlet channel of the valve core cavity, and the lower end of the valve rod extends into the annular boss.
3. The electrically adjustable dynamic balance valve according to any one of claims 1-2, wherein the sealing member is an elastic sheet having a curved surface of revolution, and has a substantially W-shaped longitudinal section with rounded corners, a stem hole capable of passing through the stem is provided at a central portion thereof, an annular protrusion having a downward convex shape is provided between the stem hole and a peripheral edge thereof, the peripheral edge thereof is fixed to the top end port of the valve element, the annular protrusion is located in the valve element, a radially outer side surface of the annular protrusion is adjacent to an inner wall of the valve element, and the outlet of the valve element chamber is located radially outside the annular protrusion.
4. The electrically adjustable dynamic balance valve according to claim 3, wherein the upper portion of the valve stem is provided with a polished rod section, the lower portion of the valve stem is provided with an external thread section, the valve stem is slidably connected with the sealing element through a sliding element, the sliding element is provided with a vertical central through hole and is sleeved on the polished rod section on the upper portion of the valve stem through the central through hole and is in clearance fit with the polished rod section, an annular groove is formed on the outer side surface of the upper portion of the sliding element, and the edge portion of the valve stem hole of the sealing element is embedded in the annular groove of the sliding element.
5. The electrically adjustable dynamic balance valve of claim 4 wherein said lower portion of said sliding element is provided with an inwardly concave upper spring mount, said upper portion of said valve flap is provided with an inwardly concave lower spring mount, a coil spring acting as a return spring is mounted between said sliding element and said valve flap, said coil spring is fitted over said valve stem, and has an upper end mounted on said upper spring mount and a lower end mounted on said lower spring mount.
6. The electrically adjustable dynamic balance valve according to any one of claims 1-2, wherein a valve cavity sealing ring is horizontally arranged between the inner wall of the valve cavity and the outer wall of the valve core, and the valve water inlet and the valve water outlet are respectively positioned at the upper and lower sides of the valve cavity sealing ring.
7. The electrically adjustable dynamic balance valve according to any one of claims 1 to 2, wherein the upper end of the valve stem is coaxially connected to the lower end of the input shaft of the valve body, the input shaft is provided with an external thread or fixedly sleeved with an external thread sleeve with an external thread, the input shaft or the external thread sleeve is threadedly connected with a pointer sleeve with an internal thread, the pointer sleeve is provided with a pointer extending radially outwards, the upper cover is fixedly provided with a cylindrical scale cover, the side wall of the scale cover is provided with a vertically elongated pointer through hole, the pointer is inserted into the pointer through hole, and the outer end of the pointer is located outside the pointer through hole or inside the pointer through hole.
8. The electrically adjustable dynamic balance valve according to claim 7, wherein the top of the externally threaded sleeve is an expanded diameter section, an annular groove is formed between the inner wall of the externally threaded sleeve and the top of the input shaft, a blocking cover is fastened on the annular groove between the top of the externally threaded sleeve and the top of the input shaft, the top of the input shaft is located in the blocking cover, and the height of the top end of the scale cover is not lower than that of the top end of the externally threaded sleeve.
9. The electrically adjustable dynamic balance valve according to any one of claims 1-2, wherein said valve body is further provided with a valve inlet side measuring port and a valve outlet side measuring port, the valve inlet side measuring port is communicated with the valve water inlet or the valve core cavity water inlet channel, the valve outlet side measuring port is communicated with the valve core cavity or the valve water outlet, the valve inlet side measuring port and the valve outlet side measuring port are respectively provided with a valve inlet side pressure measuring meter and a valve outlet side pressure measuring meter, the output of the pressure gauge on the inlet side of the valve and the pressure gauge on the outlet side of the valve are sent to a local control device and/or a remote control system through a wired and/or wireless communication mode, and the control output of the remote control system and/or the local control device is accessed into the control circuit of the electric controller in a wireless and/or wired mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744280.5A CN109555883B (en) | 2018-07-09 | 2018-07-09 | Electric adjustable dynamic balance valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744280.5A CN109555883B (en) | 2018-07-09 | 2018-07-09 | Electric adjustable dynamic balance valve |
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| CN109555883A CN109555883A (en) | 2019-04-02 |
| CN109555883B true CN109555883B (en) | 2020-10-23 |
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| CN201810744280.5A Active CN109555883B (en) | 2018-07-09 | 2018-07-09 | Electric adjustable dynamic balance valve |
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| CN113623448B (en) * | 2021-10-12 | 2021-12-14 | 南通透灵信息科技有限公司 | Sluice control system equipment based on Internet of things and working method thereof |
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| CN102072348A (en) * | 2011-01-31 | 2011-05-25 | 欧文托普阀门***(北京)有限公司 | Valve liner type adjustable dynamic balance valve |
| CN104197056A (en) * | 2014-08-21 | 2014-12-10 | 宁波埃美柯铜阀门有限公司 | Adjustable flow dynamic balance valve |
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| CN205978690U (en) * | 2016-08-18 | 2017-02-22 | 重庆高金实业有限公司 | Under put control by temperature change flow regulator |
| CN107191645A (en) * | 2017-06-13 | 2017-09-22 | 北京艾迪西暖通科技有限公司 | Adjustable dynamic balance valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152168Y (en) * | 1993-01-18 | 1994-01-05 | 金铮 | Heat balance regulating valve in hot water central heating system |
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2018
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1130797A (en) * | 1965-12-04 | 1968-10-16 | Herbert Ruediger Gerdts | Improvements in temperature-controlled valves for regulating fluid flow |
| CN102072348A (en) * | 2011-01-31 | 2011-05-25 | 欧文托普阀门***(北京)有限公司 | Valve liner type adjustable dynamic balance valve |
| CN104197056A (en) * | 2014-08-21 | 2014-12-10 | 宁波埃美柯铜阀门有限公司 | Adjustable flow dynamic balance valve |
| CN204201254U (en) * | 2014-11-06 | 2015-03-11 | 宁波埃美柯铜阀门有限公司 | Hot water cyclesystem constant temperature equilibrium valve |
| CN205978690U (en) * | 2016-08-18 | 2017-02-22 | 重庆高金实业有限公司 | Under put control by temperature change flow regulator |
| CN107191645A (en) * | 2017-06-13 | 2017-09-22 | 北京艾迪西暖通科技有限公司 | Adjustable dynamic balance valve |
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