CN114909488A - Static balance valve and use method thereof - Google Patents

Abstract

The application discloses a static balance valve and a using method thereof, the static balance valve comprises a valve body, a valve core, a valve shaft and a driving flange, wherein the valve body comprises a middle pipe section, an inlet pipe section and an outlet pipe section which are respectively arranged at two ends of the middle pipe section, and the middle pipe section is provided with an inner cavity; the valve core is arranged in the inner cavity, and a flow passage is formed on the valve core; one end of the valve shaft penetrates through the valve body to be connected with the valve core, the other end of the valve shaft is connected with the driving flange, the central axis of the flow passage is perpendicular to the central axis of the valve shaft, and the cross section of the flow passage is in a fan-like shape; the driving flange is driven by external force to rotate the valve shaft, and the valve core is driven by the valve shaft to rotate in the inner cavity, so that the flow channel is respectively communicated with or blocked from the inlet pipe section and the outlet pipe section; when the valve core is driven to rotate, the flow area of the flow channel and the inlet pipe section or the outlet pipe section is in a functional relation with the rotation angle of the valve core. The static balance valve solves the problem that a valve in the prior art is difficult to realize accurate regulation of pressure and flow.

Description

Static balance valve and use method thereof

Technical Field

The application relates to the technical field of valves, in particular to a static balance valve and a using method thereof.

Background

The valve has extremely high application in a pipeline system, and can control parameters such as flow rate, flow direction, pressure, temperature and the like of flowing fluid media. Various valves are usually required in the piping system to implement the functional architecture of the piping system.

A static balance valve is generally installed in a secondary pipe network of a heat supply system (the secondary pipe network of the heat supply system refers to a pipe network from a heat exchange station to a heat supply user) and used for adjusting the pressure and flow of a heat supply medium (hot water with impurities) so as to solve the problem of hydraulic imbalance caused by different user positions in the heat supply pipe network. The static balance valve can accurately control the pressure and the flow of a medium due to the specific internal structural design, so that the static balance valve plays a vital role in maintaining the hydraulic balance of a secondary pipe network of a heating system.

Static balance valves used in the construction of conventional pipe networks are all made of metal materials, so the problems of corrosion resistance and rust resistance must be considered, the influence and loss caused by the failure of the valves are avoided, the generation and accumulation of water scales and the growth of microorganisms are required to be controlled in the heat supply pipe network construction standard, heating equipment and pipelines are prevented from being blocked, and the normal operation of a radiator thermostatic valve, a mechanical heat meter and the like is particularly ensured. In order to suppress scale in hot water generated by calcium and magnesium ions, hot water generally needs to be softened, and the softened water has high corrosivity, has a destructive effect on a valve made of metal, reduces the valve control performance, and reduces the service life of the valve. The static balance valve is usually welded with the pipeline and buried underground, so that the valve is inconvenient to check, maintain and replace after corrosion failure. Moreover, the existing metal static balance valve has low regulation precision on fluid pressure and flow, so that the regulation and control of the whole pipe network system on water power are not accurate enough.

Therefore, the existing metal static balance valve is easily corroded by softened water, is inconvenient to replace and maintain after being welded with a pipeline, and has low adjustment precision on fluid pressure and flow due to the problem of the internal structure of the valve body. Therefore, it is necessary to provide a new technical solution to solve the problems in the prior art.

Disclosure of Invention

The application provides a static balance valve and a using method thereof, which are used for solving the problem that the valve in the prior art is difficult to realize accurate regulation of pressure and flow.

In order to achieve the above purpose, the present application provides the following technical solutions:

on one hand, the application provides a static balance valve, which comprises a valve body, a valve core, a valve shaft and a driving flange, wherein the valve body comprises a middle pipe section, an inlet pipe section and an outlet pipe section, the inlet pipe section and the outlet pipe section are respectively arranged at two ends of the middle pipe section, the middle pipe section is provided with an inner cavity, and the inlet pipe section and the outlet pipe section are respectively in adaptive connection with a pipeline interface; the valve core is arranged in the inner cavity, and a flow passage is formed on the valve core; one end of the valve shaft penetrates through the valve body to be connected with the valve core, the other end of the valve shaft is connected with the driving flange, the central axis of the flow passage is perpendicular to the central axis of the valve shaft, and the cross section of the flow passage is in a fan-like shape;

the valve shaft is driven by the valve shaft to rotate, and the valve core is driven by the valve shaft to rotate in the inner cavity, so that the flow channel is respectively communicated with or blocked from the inlet pipe section and the outlet pipe section; when the valve core is driven to rotate, the flow area of the flow channel and the inlet pipe section or the outlet pipe section is in a functional relation with the rotation angle of the valve core.

In the technical scheme, the cross section of the flow passage is in a fan-like shape formed by sequentially connecting a first straight line section, a second straight line section, a third straight line section, an arc line section and a fourth straight line section in a head-to-tail smooth transition manner; an included angle formed by the first straight line section and the second straight line section is opposite to the center of the arc line section, and the length of a connecting line of a junction of the first straight line section and the fourth straight line section and a junction of the second straight line section and the third straight line section is smaller than the chord length of the arc line section.

Further, when the valve core is rotated so that the central axis of the flow passage is parallel to the central axis of the intermediate pipe section, the flow passage is in a complete conduction state; when the valve core is rotated to enable the central axis of the flow channel and the central axis of the middle pipe section to form an included angle, the flow area of the flow channel is reduced along with the increase of the included angle; when the valve core is driven to rotate, the flow area of the flow channel and the inlet pipe section or the outlet pipe section is in a proportional function relation with the rotation angle of the valve core.

Further, the valve body, the valve core, the valve shaft and the driving flange are PE structural members respectively.

Furthermore, reserved pipe interfaces are respectively arranged on the inlet pipe section and the outlet pipe section, the reserved pipe interfaces are used for being connected with an external pipe, and the external pipe is connected with a pressure tester or a flow tester.

Furthermore, a metal thread insert is nested in the reserved pipe joint, and an internal thread matched with the external connecting pipe is arranged on the inner wall of the metal thread insert.

Furthermore, the inner wall of the inner cavity of the valve body is provided with two supporting structures which are arranged oppositely from left to right, the valve core is arranged between the two supporting structures, and the central axes of the two supporting structures are vertical to the central axis of the valve shaft.

Furthermore, the supporting structure comprises a retainer and a sealing ring, an installation position used for clamping the retainer is formed on the inner wall of the inner cavity of the valve body, a limiting surface matched with the outer wall of the valve core is formed on the retainer, and when the valve core is driven to rotate, the valve core slides relative to the limiting surface.

Furthermore, an installation position matched with the sealing ring is formed on the retainer.

Furthermore, the two support structures are respectively a first support structure and a second support structure, the first support structure comprises a first retainer and a first sealing ring, and the second support structure comprises a second retainer and a second sealing ring; the first retaining frame is arranged at the joint of the middle pipe section and the inlet pipe section, and the first sealing ring is embedded in the butt joint of the first retaining frame and the inlet pipe section; the second retainer is arranged at the joint of the middle pipe section and the outlet pipe section, and the second sealing ring is embedded in the butt joint of the second retainer and the outlet pipe section.

Further, an installation groove matched with the valve shaft is formed in the valve core, the valve shaft is clamped in the installation groove, the valve core slides relative to the valve shaft through the installation groove under the action of fluid pressure, and the length extension direction of the installation groove is parallel to the direction of the central axis of the flow channel; the side wall of the middle pipe section is provided with a through hole matched with the valve shaft, a sealing ring is arranged between the inner wall of the through hole and the outer wall of the valve shaft, the outer wall of the middle pipe section is provided with a flange mounting seat matched with the driving flange, the through hole is arranged at the center of the flange mounting seat, and the valve shaft penetrates through the through hole and is connected with the driving flange.

Furthermore, two limiting bosses are formed on the flange mounting seat and are arranged oppositely.

Further, one side of drive flange is provided with two screens arch, two the protruding relative setting of screens, two spacing boss and two the protruding dislocation set of screens makes when drive flange is rotated to the biggest turned angle, two the screens arch respectively with two spacing boss butt, spacing boss forms the bellied spacing of screens.

Furthermore, an angle indication scale is arranged on the surface of the driving flange and used for indicating the rotation angle of the driving flange.

The valve core is characterized by further comprising a lock disc, the lock disc is covered on the surface of the driving flange provided with angle indication scales, a scale indication window is formed in the lock disc and used for indicating the rotation angle of the valve core, and the lock disc is in threaded fastening connection with the flange mounting seat and used for achieving locking of the driving flange. Furthermore, a reserved boss matched with the driving handle is arranged at the center of the driving flange, the driving handle is used for realizing the rotation driving of the driving flange, the central axis of the reserved boss is overlapped with the central axis of the valve shaft, a central through hole is formed in the reserved boss, and the end part of the valve shaft is inserted into the central through hole.

Further, still include dustproof protection cover, dustproof protection cover covers and establishes on the driving flange, dustproof protection cover with the connection can be dismantled to the flange mount pad.

Furthermore, a central through hole formed on the reserved boss is a square hole; the driving handle comprises a holding rod, a square end arranged at one end of the holding rod and an accommodating cavity arranged at the other end of the holding rod; the square end head is matched with the central through hole of the reserved boss; the accommodating cavity forms an accommodating space of the screw.

In another aspect, the present application also provides a method of using a static balancing valve, including:

tightly connecting an inlet pipe section and an outlet pipe section of the static balance valve with a pipeline respectively;

the driving flange is rotated to drive the valve shaft to rotate, so that the valve core is driven to rotate, the flow area of a flow channel on the valve core and the flow area of a pipeline are adjusted, and the flow area of the flow channel and the flow area of the pipeline are in a function relation with the rotation angle of the valve core;

when the valve core is rotated, the central axis of the flow channel is parallel to the central axis of the middle pipe section of the valve body, the flow channel is completely communicated, and when the valve core is rotated, the central axis of the flow channel and the central axis of the middle pipe section of the valve body form an included angle, the flow area of the flow channel is reduced along with the increase of the included angle.

Compared with the prior art, the method has the following beneficial effects:

1. the heat supply system requires the medium flow and pressure in the pipeline to be adjusted according to the required characteristics, namely the flow characteristic curve of the static balance valve is required to be 'integer percentage' characteristic, but the current static balance valve cannot realize such accurate flow regulation and control. The application provides a static balance valve includes valve body, case, valve shaft and driving flange, and driving flange can realize the rotation to the valve shaft under the drive of external force, and the case rotates in the inner chamber under the drive of valve shaft for the runner communicates or the separation with import pipeline section and export pipeline section respectively, and when the driven rotation of case, the flow area of runner and import pipeline section or export pipeline section is the functional relation with case turned angle. Therefore, the valve core rotation angle and the flow area (which can also be understood as flow) of the static balance valve provided by the application are in a functional relation, namely different rotation angles correspond to different flows, the use requirement that the flow characteristic curve is 'integer percent' is met, and when an operator adjusts the flow, the flow of a pipeline at the moment can be accurately determined according to the rotation angle of the valve core, so that the flow adjustment is more accurate and controllable.

2. The flow passage of the static balance valve provided by the application is in a fan-like shape, when the valve core rotates from a closed position to gradually open the static balance valve, the flow passage of the valve core is gradually and rotatably communicated, the communicated part of the flow passage forms the flow area of a fluid medium, the flow area of the flow passage is continuously changed due to the continuous change of the area of a fan-shaped area, so that the static balance valve has a specific flow characteristic (the specific flow characteristic comprises 1, an integral percentage characteristic or equal percentage characteristic, the flow characteristic is that the valve opening and the flow are not in a linear relation, if the valve opening is increased by 10 percent, the 10 percent is increased on the existing basis, the flow is also increased by 10 percent on the existing basis, the flow is small, the flow is large when the flow is large, and has the same adjusting precision on different openings, and the flow characteristic is that the valve opening and the flow are in a linear relation, if the valve opening is increased by 10%, which 10% is 10% of the maximum opening, the flow rate is also increased by 10% of the maximum flow rate, and the flow rate relatively largely changes when the valve of the linear characteristic (linear) is operated at a small opening). One end of the fan-shaped flow channel is an arc section, and a larger flow area can be provided after the flow channel of the static balance valve is completely communicated.

3. The application provides a static balance valve's valve body, case, valve shaft and driving flange are the PE structure respectively, and the difficult quality of water after softening of valve body of this kind of plastics material corrodes, has improved static balance valve's life and reliability.

4. The inlet pipe section and the outlet pipe section of the static balance valve body are respectively provided with a reserved pipe joint, and the reserved pipe joints can be used for being connected with a pressure tester or a flow tester so as to be convenient for detecting the pressure and the flow in the valve body.

5. The application provides a be provided with two bearing structure in the valve body of static balance valve, relative setting about two bearing structure, bearing structure includes holder and sealing washer, and the rotation that the holder can form the valve body case is spacing, and the sealing washer on it can realize the sealed to fluid medium, guarantees opening and close reliability of valve body.

6. The application provides a be formed with two spacing bosss on the flange mounting seat of static balance valve, two spacing bosss set up relatively, one side of driving flange is provided with two screens archs, two screens archs set up relatively, two spacing bosss and two protruding dislocation sets of screens for when driving flange is rotated to the biggest turned angle, two screens archs respectively with two spacing boss butts, spacing boss forms the bellied spacing of screens. Therefore, the driving flange and the flange mounting seat can be well matched to stop, and the rotating reliability of the valve core is ensured.

7. The application provides a static balance valve's drive flange is provided with angle indication scale on the surface, and angle indication scale is used for realizing the instruction of the turned angle of drive flange for be formed with scale indication window on the lock dish of locking drive flange, scale indication window is used for instructing case turned angle, and the turned angle of case is directly perceived to the scale is instructed to this angle of operating personnel accessible to know the valve body flow through turned angle and valve body flow area's corresponding relation.

8. The application provides a boss has been reserved on the drive flange of static balance valve, and the through-hole on the boss forms the installation position of drive handle, and the drive handle of operating personnel accessible adaptation realizes easily that the rotation of valve body case is adjusted.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. It should be understood that the specific shapes, configurations and illustrations in the drawings are not to be construed as limiting, in general, the practice of the present application; for example, it is within the ability of those skilled in the art to make routine adjustments or further optimizations based on the technical concepts disclosed in the present application and the exemplary drawings, for the increase/decrease/attribution of certain units (components), specific shapes, positional relationships, connection manners, dimensional ratios, and the like.

FIG. 1 is a disassembled schematic view of a static balancing valve provided in the present application in one embodiment;

FIG. 2 is a disassembled view of the static balancing valve provided herein, illustrating the actuating handle, in one embodiment;

FIG. 3 is a schematic diagram illustrating a ready state of an embodiment of a static balancing valve provided herein with a dust-proof cover removed and an angle adjusted by a driving handle;

FIG. 4 is a schematic illustration of an embodiment of a static balancing valve provided herein angularly adjusted using an actuating handle;

FIG. 5 is a schematic cross-sectional view of a static balancing valve according to an embodiment of the present disclosure;

FIG. 6 is an enlarged view of a portion of the structure shown at A in FIG. 5;

FIG. 7 is a schematic illustration of an embodiment of a static balancing valve according to the present disclosure with the drive flange removed from the flange mount;

FIG. 8 is a schematic perspective view of a valve element of a static balancing valve according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram illustrating a planar structure of a valve element of a static balancing valve according to an embodiment of the present disclosure;

FIG. 10a is a schematic diagram illustrating an internal partial structure of a static balancing valve in a closed state according to an embodiment of the present disclosure;

FIG. 10b is a schematic diagram illustrating an internal partial structure of a static balancing valve in a fully open state according to an exemplary embodiment;

FIG. 11 is a schematic perspective view of a drive flange of a static balancing valve according to one embodiment of the present disclosure;

fig. 12 is a schematic structural diagram illustrating an embodiment of a static balancing valve according to the present disclosure after mounting a driving flange and a lock disk.

Description of reference numerals:

1. a valve body; 11. an inlet pipe section; 12. a middle tube section; 13. an outlet pipe section; 14. reserving a pipe interface; 15. a metal threaded insert;

2. a valve core; 21. a flow channel; 211. a first straight line segment; 212. a second straight line segment; 213. a third straight line segment; 214. an arc segment; 215. a fourth straight line segment; 22. mounting grooves;

3. a first support structure; 31. a first holder; 32. a first seal ring;

4. a second support structure; 41. a second holder; 42. a second seal ring;

5. a valve shaft; 51. an O-shaped ring;

6. a flange mounting seat; 61. a limiting boss;

7. a drive flange; 71. a clamping bulge; 72. reserving a boss; 721. a central through hole;

8. a lock disc; 81. a scale indication window;

9. a dust-proof protective cover;

10. a drive handle; 101. a holding rod; 102. a square end; 103. an accommodating cavity.

Detailed Description

The present application will be described in further detail below with reference to specific embodiments thereof, with reference to the accompanying drawings.

In the description of the present application: "plurality" means two or more unless otherwise specified. The terms "first", "second", "third", and the like in this application are intended to distinguish one referenced item from another without having a special meaning in technical connotation (e.g., should not be construed as emphasizing a degree or order of importance, etc.). The terms "comprising," "including," "having," and the like, are intended to be inclusive and mean "not limited to" (some elements, components, materials, steps, etc.).

In the present application, terms such as "upper", "lower", "left", "right", "middle", and the like are generally used for easy visual understanding with reference to the drawings, and are not intended to absolutely limit the positional relationship in an actual product. Changes in these relative positional relationships are also considered to be within the scope of the present disclosure without departing from the technical concepts disclosed in the present disclosure.

Example one

The embodiment of the application provides a static balance valve. Referring to fig. 1, the static balance valve comprises a valve body 1, a valve core 2, a valve shaft 5 and a driving flange 7, wherein the valve body 1 comprises a middle pipe section 12, an inlet pipe section 11 and an outlet pipe section 13 which are respectively arranged at two ends of the middle pipe section 12, the middle pipe section 12 is provided with an inner cavity, and the inlet pipe section 11 and the outlet pipe section 13 are respectively in adaptive connection with a pipeline interface; the valve core 2 is arranged in the inner cavity, and a flow passage 21 is formed on the valve core 2; one end of the valve shaft 5 penetrates through the valve body 1 to be connected with the valve core 2, the other end of the valve shaft is connected with the driving flange 7, the central axis of the flow passage 21 is perpendicular to the central axis of the valve shaft 5, and the cross section of the flow passage 21 is in a fan-like shape; the driving flange 7 is driven by external force to rotate the valve shaft 5, and the valve core 2 is driven by the valve shaft 5 to rotate in the inner cavity, so that the flow channel 21 is respectively communicated with or blocked from the inlet pipe section 11 and the outlet pipe section 13; when the valve core 2 is driven to rotate, the flow area of the flow passage 21 and the inlet pipe section 11 or the outlet pipe section 13 is in a function relationship with the rotation angle of the valve core 2.

The heat supply system requires the medium flow and pressure in the pipeline to be adjusted according to the required characteristics, namely the flow characteristic curve of the static balance valve is required to be 'integer percentage' characteristic, but the current static balance valve cannot realize such accurate flow regulation and control. The driving flange 7 of the static balance valve provided by the application can realize rotation of the valve shaft 5 under the driving of external force, and the valve core 2 rotates in the inner cavity under the driving of the valve shaft 5, so that the flow channel 21 is respectively communicated or separated with the inlet pipe section 11 and the outlet pipe section 13, and when the valve core 2 is driven to rotate, the flow area of the flow channel 21 and the inlet pipe section 11 or the outlet pipe section 13 is in a functional relation with the rotation angle of the valve core 2. Therefore, the rotation angle of the valve core 2 of the static balance valve provided by the application is in a functional relation with the flow area (which can also be understood as the flow), namely, different rotation angles correspond to different flows, the use requirement that the flow characteristic curve is 'integer percent' is met, when an operator adjusts the flow, the flow of a pipeline at the moment can be accurately determined according to the rotation angle of the valve core 2, and the flow adjustment is more accurate and controllable.

In order to realize that the flow areas of the flow channel 21 and the inlet pipe section 11 or the outlet pipe section 13 are in a functional relationship with the rotation angle of the valve core 2, the cross section of the flow channel 21 of the static balance valve provided by the application is in a special-shaped polygonal shape.

In an embodiment, referring to fig. 8 and 9, the cross-sectional shape of the flow channel 21 is a fan-like shape formed by connecting a first straight line segment 211, a second straight line segment 212, a third straight line segment 213, an arc segment 214, and a fourth straight line segment 215 in sequence in an end-to-end smooth transition manner; the included angle formed by the first straight line section 211 and the second straight line section 212 is opposite to the center of the arc line section 214, and the length of the connecting line of the intersection point of the first straight line section 211 and the fourth straight line section 215 and the intersection point of the second straight line section 212 and the third straight line section 213 is smaller than the chord length of the arc line section 214.

When the spool 2 is rotated such that the central axis of the flow passage 21 is parallel to the central axis of the intermediate pipe section 12, the flow passage 21 is in a fully-communicated state. When the valve element 2 is rotated such that the central axis of the flow channel 21 forms an angle with the central axis of the intermediate pipe section 12, the flow area of the flow channel 21 decreases with increasing angle. The inventor researches and calculates the phenomenon, and then finds that when the valve core 2 is driven to rotate, the flow area of the flow channel 21 and the inlet pipe section 11 or the outlet pipe section 13 is in a proportional function relation with the rotation angle of the valve core 2. The adjustment mode of the functional relation satisfies the valve use requirement that the flow characteristic curve is 'integer percent'. The flow channel 21 of the static balance valve provided by the application is in a fan-like shape, when the valve core 2 rotates from the off position to gradually open the static balance valve, the flow channel 21 of the valve core 2 is gradually and rotationally communicated, the communicated part of the flow channel 21 forms the flow area of a fluid medium, and the flow area of the flow channel 21 is continuously changed due to the continuous change of the area of the fan-shaped area, so that a pressure flow control element with a specific flow characteristic (integral percentage) is formed. One end of the fan-like flow passage 21 is a circular arc section, and a larger flow area can be provided after the flow passage 21 of the static balance valve is completely communicated. Referring to fig. 10a, the internal structure of the valve body 1 is shown with the flow passage 21 of the valve core 2 in a closed state. Fig. 10b shows the internal structure of the valve body 1 with the flow passage 21 of the valve element 2 in a fully open state.

In an embodiment, in order to prevent the static balance valve from being corroded, the valve body 1, the valve core 2, the valve shaft 5 and the driving flange 7 of the static balance valve provided by the present application are PE structural members respectively, and of course, the static balance valve may also be structural members made of other non-metallic materials. The valve body 1 made of the plastic material is not easy to be corroded by softened water, so that the service life and the reliability of the static balance valve are improved.

The valve body 1 is an important component part of the valve, and can isolate a fluid medium (hot water supply) in the valve body 1 from the external environment, so that the medium (hot water supply) is prevented from leaking; as a mechanical element, it can be provided with mechanical properties by its own material to ensure the pressure of the carrying medium; the flow shape of the pipeline formed on the device can play a role in guiding flow; each port of the valve body 1 can be communicated with the connecting ports of other parts and components.

The inlet pipe section 11 and the outlet pipe section 13 of the valve body 1 can form a pressure-bearing part of a static balance valve, and a reserved pipe joint 14 arranged on the static balance valve can be connected with other instruments (such as a pressure gauge, a flow meter and the like) or connecting ports of pipelines.

In one embodiment, the inlet pipe section 11 and the outlet pipe section 13 are respectively provided with a reserved pipe joint 14, and the reserved pipe joint 14 is used for realizing connection with an external pipe which is connected with a pressure tester or a flow tester. The reserve tube interface 14 can be used to connect with a pressure or flow meter to facilitate the detection of pressure and flow within the valve body 1.

In one embodiment, referring to fig. 1, a metal threaded insert 15 is nested in the reserved pipe interface 14, and an internal thread matched with the external pipe is arranged on the inner wall of the metal threaded insert 15. The metal thread insert 15 can strengthen the strength of the reserved pipe joint 14, ensure the structure to be reliable, avoid the phenomena of liquid leakage and tripping and ensure the use safety of the valve. The connection between the metal thread insert 15 and the reserved pipe interface 14 is realized by mutually locking the rectangular teeth distributed on the circumference of the metal thread insert 15 and the corresponding teeth in the reserved pipe interface through the process of embedding the insert when the valve body is cast.

In one embodiment, referring to fig. 2 and 5, two support structures are oppositely arranged on the left and right of the inner wall of the inner cavity of the valve body 1, the valve core 2 is arranged between the two support structures, and the central axes of the two support structures are perpendicular to the central axis of the valve shaft 5. A sealing area is formed between the two supporting structures, when the flow passage 21 of the valve core 2 is not communicated, the two supporting structures can realize the sealing of the valve body 1 through the sealing rings on the two supporting structures, and the fluid medium at the upstream is prevented from seeping out to the downstream from the periphery of the valve core 2.

In one embodiment, the supporting structure comprises a retainer and a sealing ring, a mounting position for clamping the retainer is formed on the inner wall of the inner cavity of the valve body 1, a limiting surface matched with the outer wall of the valve core 2 is formed on the retainer, and when the valve core 2 is driven to rotate, the valve core 2 slides relative to the limiting surface. The retainer is provided with a mounting position matched with the sealing ring. Referring to fig. 2 and 5, the two support structures are a first support structure 3 and a second support structure 4, respectively, the first support structure 3 includes a first retainer 31 and a first seal ring 32, and the second support structure 4 includes a second retainer 41 and a second seal ring 42; the first retainer 31 is arranged at the joint of the middle pipe section 12 and the inlet pipe section 11, and a first sealing ring 32 is embedded at the joint of the first retainer 31 and the inlet pipe section 11; the second retainer 41 is arranged at the joint of the middle pipe section 12 and the outlet pipe section 13, and a second sealing ring 42 is embedded at the joint of the second retainer 41 and the outlet pipe section 13. The retainer can form the rotation limit of the valve core 2 of the valve body 1, and the sealing ring on the retainer can realize the sealing to the fluid medium, thereby ensuring the opening and closing reliability of the valve body 1. The retainer can also be used to fix the relative position of the sealing ring in the valve body 1, ensure that the sealing ring forms an effective sealing area with the valve core 2, and simultaneously bear the pressure from the medium (hot water). The sealing ring, which may be made of an elastic material (e.g. rubber), is pressed against the valve element 2 to form a sealing area for isolating the medium upstream and downstream (hot water).

In one embodiment, referring to fig. 2 and 8, a mounting groove 22 adapted to the valve shaft 5 is formed on the valve core 2, the valve shaft 5 is clamped in the mounting groove 22, the valve core slides relative to the valve shaft 5 through the mounting groove 22 under the action of fluid pressure, and the length extension direction of the mounting groove 22 is parallel to the central axis direction of the flow passage. The side wall of the middle pipe section 12 is provided with a through hole matched with the valve shaft 5, a sealing ring is arranged between the inner wall of the through hole and the outer wall of the valve shaft 5, the outer wall of the middle pipe section 12 is provided with a flange mounting seat 6 matched with the driving flange 7, the through hole is arranged at the center of the flange mounting seat 6, and the valve shaft 5 penetrates through the through hole and is connected with the driving flange 7. The sealing ring arranged between the inner wall of the through hole and the outer wall of the valve shaft 5 can be an O-shaped ring 51, and the material is selected from high-quality rubber and is used for sealing the gap between the valve shaft 5 and the through hole of the valve body 1 so as to isolate the medium (hot water) in the valve body 1 from leaking to the external environment.

The valve core 2 that this application provided is the ball core, and the ball core cooperates with the sealing washer under the effect of external force and forms corresponding seal area, and when the ball core was in specific position (valve closing position) in valve body 1, the medium (the heat supply water) of upper and lower reaches was kept apart in ball core both sides, and the ball core plays the effect of shutoff medium (heat supply water), like figure 1. The connecting part of the ball core and the valve shaft 5 is movably connected, namely the shaft end of the valve shaft 5 can slide in a specific direction (namely the reciprocating sliding in the length extending direction of the mounting groove) in the mounting groove 22 of the ball core, when the static balance valve is in a closed position, under the pressure action of a medium (hot water supply), the ball core can slide along the direction of the central axis of the valve body 1, so that the ball core is forced to be attached to a sealing ring of a downstream supporting structure, the sealing load is increased, and the sealing is more reliable.

The valve element 2 acts as a mechanical element, the mechanical properties of which are provided by its own material to ensure the pressure of the carrier medium (hot water), the maximum of which is the pressure of the upstream medium (hot water) when the valve is in the closed position.

In one embodiment, referring to fig. 7, two limit bosses 61 are formed on the flange mounting seat 6, and the two limit bosses 61 are oppositely arranged. One side of drive flange 7 is provided with two screens arch 71, see fig. 11, two screens arch 71 relative settings (only show a spacing boss 61 because of the angle problem of drawing, another is sheltered from can not show), two spacing bosses 61 and the protruding 71 dislocation set of two screens for when drive flange 7 was rotated to the biggest turned angle, two screens arch 71 respectively with two spacing bosses 61 butt, spacing boss 61 forms the spacing of the protruding 71 of screens. Referring to fig. 10a and 10b, the position-limiting protrusion 61 and the position-limiting protrusion 71 can limit the static equilibrium valve at two positions, i.e., fully open (90 degrees) and fully closed (0 degrees). Therefore, the driving flange 7 and the flange mounting seat 6 can be matched well to stop, and the rotation reliability of the valve core 2 is ensured.

In one embodiment, referring to fig. 11, the driving flange 7 is provided with an angle indicating scale on the surface thereof, and the angle indicating scale is used for indicating the rotation angle of the driving flange 7. Referring to fig. 12, the static balance valve further includes a lock plate 8, the lock plate 8 covers the surface of the driving flange 7 provided with the angle indication scale, a scale indication window 81 is formed on the lock plate 8, the scale indication window 81 is used for indicating the rotation angle of the valve core 2, and the lock plate 8 is in threaded fastening connection with the flange mounting seat 6. The operating personnel accessible this angle indication scale directly perceived judges the turned angle of case 2 to know valve body 1 flow through turned angle and 1 area of flow's of valve body corresponding relation.

In an embodiment, referring to fig. 11 and fig. 4, a reserved boss 72 adapted to the driving handle 10 is disposed at a central position of the driving flange 7, the driving handle 10 is used for rotationally driving the driving flange 7, a central axis of the reserved boss 72 coincides with a central axis of the valve shaft 5, a central through hole 721 is formed on the reserved boss 72, and an end of the valve shaft 5 is inserted into the central through hole 721.

In one embodiment, referring to fig. 3, the static balancing valve further comprises a dust-proof cover 9, the dust-proof cover 9 covers the driving flange 7, and the dust-proof cover 9 is detachably connected with the flange mounting seat 6. When the static balance valve does not need to be adjusted, the dustproof protective cover 9 can be covered to prevent dust, and the damage of the driving flange 7 caused by other reasons can be avoided. When the static balance valve needs to be adjusted, a worker can detach the dustproof protection cover 9 to perform adjustment operation.

In one embodiment, referring to fig. 3, the central through hole 721 formed on the reserved boss 72 is a square hole. The driving handle 10 comprises a holding rod 101, a square end 102 arranged at one end of the holding rod 101, and an accommodating cavity 103 arranged at the other end of the holding rod 101; the square end head 102 is matched with the central through hole 721 of the reserved boss 72; the accommodating cavity 103 forms an accommodating space for the screw. The through hole on the reserved boss 72 forms the installation position of the driving handle 10, and an operator can easily realize the rotation adjustment of the valve core 2 of the valve body 1 through the adaptive driving handle 10.

The inventor of the application combines the corrosion resistance of non-metallic materials and the special control valve design technology and concept (mainly the structural design of the valve core 2 flow channel 21, the flow area of the valve core 2 flow channel 21 is related to the rotation angle function of the valve core 2), and solves the problems caused by the use of metal material valves in the prior art. Engineering plastics can be selected according to the operating mode in the in-service use process, the mechanical performance requirement of current operating mode is satisfied through the selected preparation of engineering plastics, and engineering plastics self have anticorrosive anti-corrosion characteristics can also solve the corruption problem that softened water brought, has prolonged valve life, provides more reliable solution than metal material valve. The application provides a static balance valve has improved the regulation and control precision and the intensity of valve to fluid pressure and flow through optimizing 1 runner 21 of valve body and the support internals structure in the valve to make whole pipe network system more accurate to the regulation and control of water conservancy, promoted pipe network system's economic benefits, also bring better experience for the customer simultaneously.

Example two

The application embodiment provides a use method of a static balance valve, which can be briefly summarized as follows:

an inlet pipe section 11 and an outlet pipe section 13 of the static balance valve are respectively and tightly connected with a pipeline;

the driving flange 7 is rotated to drive the valve shaft 5 to rotate, so as to drive the valve core 2 to rotate, so that the flow area of the flow channel 21 on the valve core 2 and the pipeline is adjusted, and the flow area of the flow channel 21 and the pipeline is in a functional relation with the rotation angle of the valve core 2;

when the valve core 2 is rotated to enable the central axis of the flow passage 21 to be parallel to the central axis of the middle pipe section 12 of the valve body 1, the flow passage 21 is completely communicated, and when the valve core 2 is rotated to enable the central axis of the flow passage 21 to form an included angle with the central axis of the middle pipe section 12 of the valve body 1, the flow area of the flow passage 21 is reduced along with the increase of the included angle.

In the actual use process, still include the dismantlement to dustproof safety cover 9 on the drive flange 7, after drive flange 7 exposes, dismantle the connecting screw of lock dish 8 and drive flange 7, rotate the regulation through drive handle 10 to drive flange 7, reset each screw, part etc. of dismantling after the regulation is accomplished.

Consequently, the locking disc 8 that this application provided and the cooperation of drive flange 7 carry out the locking to the arbitrary open position of static balance valve, discern valve opening angle through the scale on the drive flange 7 face simultaneously. When the opening angle of the valve needs to be adjusted, firstly, the screws of the lock discs 8 are loosened, the driving flange 7 is rotated by using the driving handle 10, the numbers (corresponding to the opening angle of the valve) in the valve position indication window on the lock discs 8 are identified, after the opening angle is reached, the handle is removed, the screws of the two lock discs 8 are locked, and the driving flange 7 is locked by the friction force between the contact surfaces of the lock discs 8 and the driving flange 7.

The driving handle 10 can be used for rotating the driving flange 7, so as to adjust the opening angle of the static balance valve, when in use, the square end head 102 on the driving handle is inserted into the square through hole on the reserved boss 72 of the driving flange 7, and the handle is rotated to a required angle. The tail end of the driving handle 10 is provided with a containing cavity for containing a screwdriver bit for locking the screw of the lock disc 8, and when the screw of the lock disc 8 needs to be loosened or locked, the screwdriver bit can be operated by being inserted into the hexagonal slotted hole at the tail end of the handle.

The utility model provides a dustproof protection cover 9 installs behind the corresponding position of valve body 1, needs lockhole on it and the lockhole that corresponds on the valve body 1 to adjust well, uses tool to lock or lead sealing to fix dustproof protection cover 9 on valve body 1, avoids the mistake to touch drive flange 7 and leads to the valve position to change.

All the technical features of the above embodiments can be arbitrarily combined (as long as there is no contradiction between the combinations of the technical features), and for brevity of description, all the possible combinations of the technical features in the above embodiments are not described; these examples, which are not explicitly described, should be considered to be within the scope of the present description.

The present application has been described in considerable detail with reference to certain embodiments and examples thereof. It should be understood that several conventional adaptations or further innovations of these specific embodiments may also be made based on the technical idea of the present application; however, such conventional modifications and further innovations may also fall within the scope of the claims of the present application as long as they do not depart from the technical idea of the present application.

Claims (10)

1. A static balance valve is characterized by comprising a valve body, a valve core, a valve shaft and a driving flange, wherein the valve body comprises a middle pipe section, an inlet pipe section and an outlet pipe section which are respectively arranged at two ends of the middle pipe section, the middle pipe section is provided with an inner cavity, and the inlet pipe section and the outlet pipe section are respectively in adaptive connection with a pipeline interface; the valve core is arranged in the inner cavity, and a flow passage is formed on the valve core; one end of the valve shaft penetrates through the valve body to be connected with the valve core, the other end of the valve shaft is connected with the driving flange, the central axis of the flow passage is perpendicular to the central axis of the valve shaft, and the cross section of the flow passage is in a fan-like shape;

the valve shaft is driven by the valve shaft to rotate, and the valve core is driven by the valve shaft to rotate in the inner cavity, so that the flow channel is respectively communicated with or blocked from the inlet pipe section and the outlet pipe section; when the valve core is driven to rotate, the flow area of the flow channel and the inlet pipe section or the outlet pipe section is in a functional relation with the rotation angle of the valve core.

2. The static balance valve of claim 1, wherein the cross-sectional shape of the flow passage is a fan-like shape formed by connecting a first straight line segment, a second straight line segment, a third straight line segment, an arc line segment and a fourth straight line segment in sequence in an end-to-end smooth transition manner; an included angle formed by the first straight line section and the second straight line section is opposite to the center of the arc line section, and the length of a connecting line of a junction of the first straight line section and the fourth straight line section and a junction of the second straight line section and the third straight line section is smaller than the chord length of the arc line section;

when the valve core is rotated to enable the central axis of the flow channel to be parallel to the central axis of the middle pipe section, the flow channel is in a complete conduction state;

when the valve core is rotated to enable the central axis of the flow channel and the central axis of the middle pipe section to form an included angle, the flow area of the flow channel is reduced along with the increase of the included angle;

when the valve core is driven to rotate, the flow area of the flow channel and the inlet pipe section or the outlet pipe section is in a proportional function relation with the rotation angle of the valve core.

3. The static balancing valve of claim 1, wherein the valve body, the valve spool, the valve shaft, and the driving flange are each PE structural members;

the inlet pipe section and the outlet pipe section are respectively provided with a reserved pipe joint which is used for realizing connection with an external pipe, and the external pipe is connected with a pressure tester or a flow tester;

the inner wall of the metal thread insert is provided with an internal thread matched with the external connecting pipe.

4. The static balance valve of claim 1, wherein two support structures are oppositely arranged on the left and right of the inner wall of the inner cavity of the valve body, the valve core is arranged between the two support structures, and the central axes of the two support structures are vertical to the central axis of the valve shaft;

the supporting structure comprises a retainer and a sealing ring, an installation position for clamping the retainer is formed on the inner wall of the inner cavity of the valve body, a limiting surface matched with the outer wall of the valve core is formed on the retainer, and when the valve core is driven to rotate, the valve core slides relative to the limiting surface;

and the retainer is provided with an installation position matched with the sealing ring.

5. The static balancing valve of claim 4, wherein the two support structures are a first support structure and a second support structure, respectively, the first support structure including a first retainer and a first seal ring, and the second support structure including a second retainer and a second seal ring;

the first retaining frame is arranged at the joint of the middle pipe section and the inlet pipe section, and the first sealing ring is embedded in the butt joint of the first retaining frame and the inlet pipe section;

the second retainer is arranged at the joint of the middle pipe section and the outlet pipe section, and the second sealing ring is embedded in the butt joint of the second retainer and the outlet pipe section.

6. The static balance valve of claim 1, wherein the valve core is provided with a mounting groove adapted to the valve shaft, the valve shaft is clamped in the mounting groove, the valve core slides relative to the valve shaft through the mounting groove under the action of fluid pressure, and the length extension direction of the mounting groove is parallel to the central axis direction of the flow passage;

the side wall of the middle pipe section is provided with a through hole matched with the valve shaft, a sealing ring is arranged between the inner wall of the through hole and the outer wall of the valve shaft, the outer wall of the middle pipe section is provided with a flange mounting seat matched with the driving flange, the through hole is arranged at the center of the flange mounting seat, and the valve shaft penetrates through the through hole and is connected with the driving flange.

7. The static balance valve of claim 6, wherein two limit bosses are formed on the flange mounting seat, and the two limit bosses are oppositely arranged;

two clamping protrusions are arranged on one side of the driving flange, the two clamping protrusions are arranged oppositely, and the two limiting bosses and the two clamping protrusions are arranged in a staggered mode, so that when the driving flange is rotated to the maximum rotation angle, the two clamping protrusions are abutted to the two limiting bosses respectively, and the limiting bosses form the limiting of the clamping protrusions;

the angle indication scale is arranged on the surface of the driving flange and used for achieving indication of the rotation angle of the driving flange.

8. The static balance valve of claim 7, further comprising a lock disc, wherein the lock disc is covered on the surface of the driving flange provided with the angle indication scale, a scale indication window is formed on the lock disc and used for indicating the rotation angle of the valve core, and the lock disc is in threaded fastening connection with the flange mounting seat and used for realizing locking of the driving flange;

a reserved boss matched with the driving handle is arranged at the center of the driving flange, the driving handle is used for realizing the rotation driving of the driving flange, the central axis of the reserved boss is superposed with the central axis of the valve shaft, a central through hole is formed in the reserved boss, and the end part of the valve shaft is inserted in the central through hole;

still include dustproof protection cover, dustproof protection cover covers and establishes on the drive flange, dustproof protection cover with flange mount pad can dismantle the connection.

9. The static balance valve of claim 8, wherein the central through hole formed on the pre-defined boss is a square hole;

the driving handle comprises a holding rod, a square end arranged at one end of the holding rod and an accommodating cavity arranged at the other end of the holding rod; the square end head is matched with the central through hole of the reserved boss; the accommodating cavity forms an accommodating space of the screw.

10. A method of using a static balancing valve according to any one of the claims 1-9, characterized in that it comprises:

tightly connecting an inlet pipe section and an outlet pipe section of the static balance valve with a pipeline respectively;

the driving flange is rotated to drive the valve shaft to rotate, so that the valve core is driven to rotate, the flow area of a flow channel on the valve core and the flow area of a pipeline are adjusted, and the flow area of the flow channel and the flow area of the pipeline are in a function relation with the rotation angle of the valve core;

when the valve core is rotated, the central axis of the flow channel is parallel to the central axis of the middle pipe section of the valve body, the flow channel is completely communicated, and when the valve core is rotated, the central axis of the flow channel and the central axis of the middle pipe section of the valve body form an included angle, the flow area of the flow channel is reduced along with the increase of the included angle.

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