Electric adjustable dynamic flow balance valve

Abstract

The utility model discloses an electric adjustable dynamic flow balance valve which comprises a valve body, a valve cover, a valve core assembly, an electric actuator and the like, the valve core assembly comprises a valve core frame, a water inlet and a water outlet, the water inlet and the water outlet are arranged on the valve core frame, and an adjusting knob for adjusting the flow of the water inlet is arranged in the valve core frame. A diaphragm, a diaphragm seat, a water outlet cavity and a balance cavity are arranged at the bottom of the valve element frame, the water outlet cavity and the balance cavity are formed above and below the diaphragm, a flow stabilizing spring which elastically pushes the diaphragm seat to move downwards is arranged in the water outlet cavity, and the balance cavity is directly communicated with the inlet end. As the valve core assembly integrates the functions of opening and closing in a sealing manner, adjusting the water inlet flow, stabilizing and adjusting the water outlet flow and the like, and can be integrally extracted, assembled and disassembled, the valve core assembly has the advantages of being convenient to use, simple in structure, convenient to operate and high in practicability. Therefore, the valve has the advantages of compact structure, simplicity and convenience in disassembly and assembly, long service life and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the dynamic flow balance valve in pipeline valve, concretely is electrically adjustable dynamic flow balance valve. BACKGROUND

[0002] Dynamic flow balance valve is according to system working condition variation and automatically changes resistance coefficient, thereby in certain pressure difference range, can effectively control the flow that passes keeps a constant pipeline valve. Current dynamic flow balance valve can be divided into fixed flow balance valve and adjustable flow balance valve two, is widely used in air conditioning, heating and heat supply system, plays the role of preventing each area uneven cold and heat, its structure usually is by valve body, seal installation in the valve body top valve cover, set in the valve cover and valve body valve core subassembly and install on the valve cover electric actuator etc. constitute, wherein, valve core subassembly only has the function of opening and closing and can not be extracted, and the regulating structure of dynamic flow balance valve's water inflow and water outflow is designed in the valve body alone, like this not only leads to the complexity of the internal structure of valve body and the inconvenience of processing, makes the compactness of the structure of valve gate is poor, and the valve core subassembly that can not be extracted also brings great inconvenience to cleaning or replacement, makes the valve gate is more troublesome to disassemble, thereby also influences the service life of valve gate. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem in at overcoming prior art's defects and provides a kind of electrically adjustable dynamic flow balance valve with compact structure, easy to disassemble and long service life.

[0004] The technical problem of the utility model is realized by the following technical scheme:

[0005] A kind of electrically adjustable dynamic flow balance valve, including valve body, seal installation in the valve body top valve cover, set in the valve cover and valve body valve core subassembly and install on the valve cover electric actuator;The valve body two ends are respectively equipped with import end and export end, the valve core subassembly includes the valve core frame of seal installation between import end and export end, the upper outer surface of this valve core frame is equipped with the water inlet of import end communication, the lower outer surface of valve core frame is equipped with the water outlet of export end communication;The valve core frame is equipped with the adjusting knob of adjusting water inlet flow and the valve flap driven by electric actuator and sealed opening and closing water inlet;The bottom of the valve core frame is equipped with diaphragm, the inside circumference of this diaphragm is sealed and fixed on diaphragm seat, the outside circumference of diaphragm is sealed and fixed on the lower end of valve core frame, and make the valve core frame in the upper of diaphragm form water outlet chamber, the valve body in the lower of diaphragm form balance chamber, the water outlet chamber is equipped with the steady flow spring of elastic top pushing diaphragm seat and moving down, the balance chamber is directly communicated with import end, and according to the water inlet pressure of import end and cooperates steady flow spring dynamic balance diaphragm seat's lifting movement, in turn drive diaphragm dynamic regulation water outlet flow.

[0006] The valve core frame is internally provided with a water inlet cavity at the upper part, a water outlet cavity at the lower part, and a water passage hole respectively connecting the water inlet cavity and the water outlet cavity.

[0007] The water inlet is radially arc-shapedly arranged on the upper outer surface of the valve core frame, and the water outlet is a vertical hole arranged on the lower outer surface of the valve core frame, and the water outlet is provided with a plurality of circumferentially distributed openings.

[0008] The adjusting knob is composed of an adjusting shaft at the upper part and an adjusting cover at the lower part, the adjusting cover is installed in the water inlet cavity, and the lower outer surface of the adjusting cover is provided with an adjusting gap extending radially and arc-shapedly; the adjusting shaft drives the adjusting cover to rotate in the water inlet cavity, and drives the adjusting gap to cooperate with the water inlet to form flow adjustment of the water inlet.

[0009] The radian of the water inlet and the adjusting gap is 180°, and they are on the same horizontal plane.

[0010] The valve flap is composed of a sealing ring, a support ring coaxially arranged above the sealing ring, and a connecting strip respectively connecting the sealing ring and the support ring, the valve flap is internally provided with an opening and closing spring, and the opening and closing spring is elastically pushed on the support ring to drive the valve flap to move upward, the adjusting knob is internally provided with a vertical valve rod, the upper end of the valve rod is connected to the electric actuator, and the lower end of the valve rod is fitted in the support ring; the electric actuator drives the valve rod to move downward, and pushes the valve flap to move downward synchronously to drive the sealing ring to seal and close the adjusting gap, thereby sealing and closing the communication between the water inlet and the water inlet cavity; the electric actuator drives the valve rod to move upward, the opening and closing spring pushes the support ring upward, and pushes the valve flap to move upward synchronously to drive the sealing ring to open the adjusting gap, thereby realizing the communication between the water inlet and the water inlet cavity.

[0011] The valve core frame is internally provided with a partition plate, and the partition plate separates the valve core frame into the water inlet cavity and the water outlet cavity, and the water passage hole is arranged on the partition plate.

[0012] The valve core frame is obliquely and sealingly installed between the inlet end and the outlet end, and the axis of the valve core frame forms an angle with the axes of the inlet end and the outlet end.

[0013] The valve cover is detachably and sealingly installed on the top of the valve body, and the valve cover is removed from the top of the valve body, and the valve core assembly is extracted from the top of the valve body.

[0014] The top of the valve cover is provided with a scale disc which is positioned and fitted.

[0015] Compared with the prior art, the utility model mainly improves the valve core assembly, the valve core assembly includes the valve core frame, sets up the water inlet of the upper outer surface of valve core frame and communicates the inlet end and sets up the water outlet of the lower outer surface of valve core frame and communicates the outlet end, the valve core frame is equipped with the adjusting knob of adjusting the flow of water inlet, and the valve flap of being driven sealed open and close water inlet by electric actuator, the valve core frame bottom is equipped with the diaphragm, diaphragm seat and forms the water outlet cavity of diaphragm top and the balance cavity of diaphragm below, and the water outlet cavity is equipped with the steady flow spring of elastic pushing diaphragm seat and moves down, the balance cavity communicates directly with the inlet end, so according to the water inlet pressure of inlet end and cooperate steady flow spring to dynamic balance the lifting movement of diaphragm seat, and then can also drive diaphragm dynamic regulation the flow of water outlet. Therefore, through the structure improvement of above-mentioned makes valve core assembly not only can integrate sealed open and close, adjusting water inflow and the function such as stable and regulating water flow, and can be integrally extracted and disassembled, so can simplify the internal structure of valve body and facilitate processing, make the overall structure of valve more compact, simultaneously, the valve core assembly of extraction also brings great convenience to cleaning or replacement, makes the disassembly process of valve more simple, thereby also greatly prolongs the service life of valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the sectional structure schematic view of the utility model.

[0017] Figure 2 It is the appearance drawing of Figure 1 .

[0018] Figure 3 It is the sectional view of valve core assembly.

[0019] Figure 4 It is the perspective view of Figure 3 .

[0020] Figure 5 It is the sectional view of valve core frame.

[0021] Figure 6 It is the perspective view of Figure 5 .

[0022] Figure 7 It is the structure schematic view of adjusting knob.

[0023] Figure 8 It is the structure schematic view of valve flap.

[0024] Figure 9 It is the structure schematic view of dial. DETAILED DESCRIPTION

[0025] The utility model embodiment will be explained in detail below according to the above-mentioned drawing.

[0026] As Figures 1-9As shown, 1. valve body, 11. inlet end, 12. outlet end, 13. balance chamber, 14. balance flow channel, 2. valve cover, 3. valve core assembly, 31. valve core frame, 311. water passage, 312. water inlet, 313. water outlet, 314. water inlet chamber, 315. water outlet chamber, 316. partition plate, 317. positioning convex, 32. adjusting knob, 321. adjusting shaft, 322. adjusting cover, 323. adjusting gap, 324. valve stem hole, 33. valve flap, 331. sealing ring, 332. support ring, 333. connecting strip, 34. diaphragm, 35. diaphragm seat, 36. opening and closing spring, 37. steady flow spring, 4. electric actuator, 5. valve stem, 6. dial, 61. shaft hole, 62. scale mark, 7. O-ring.

[0027] Electrically adjustable dynamic flow balance valve, such as Figure 1 As shown, can be widely used in air conditioning, heating and heat supply system, and play a role in preventing uneven cold and heat in each area, its structure includes valve body 1, valve cover 2 on the top of valve body, valve core assembly 3 in the valve cover and valve body, and electric actuator 4 on the valve cover.

[0028] The valve body 1 is provided with inlet end 11 and outlet end 12 at both ends, namely Figure 1 As shown in the view, the left end of the view is the inlet end 11, and the right end of the view is the outlet end 12. The inlet end 11 and the outlet end 12 are on the same horizontal axis, and are formed by hot forging blank, so only two workstations are needed to turn the valve core assembly installation position and the pressure guide hole, which is more efficient.

[0029] The mounting port of the valve body 1 on the top is provided with a valve cover 2 which is screwed and detachably sealed by O-ring. When the valve cover is removed from the top of the valve body, the valve core assembly 3 can be loaded or taken out through the mounting port, that is, the valve core assembly 3 can be extracted from the top of the valve body.

[0030] Obviously, since the valve core assembly 3 can be extracted and disassembled as a whole, the internal structure of the valve body 1 can be simplified and the machining is facilitated, so that the overall structure of the valve is more compact. Moreover, the extractable valve core assembly 3 also brings great convenience to cleaning or replacement, so that the disassembly process of the valve is more simple, thereby greatly prolonging the service life of the valve.

[0031] The valve core assembly 3 comprises a valve core frame 31 which is sealingly installed between the inlet end 11 and the outlet end 12. The valve core frame of the present embodiment is as shown in Figure 1The inclined seal shown is installed between the inlet end 11 and the outlet end 12. Therefore, an O-ring 7 needs to be fitted on the outer circumference of the valve core frame 3 as a sealing element. The O-ring can also prevent the medium from leaking directly from the inlet end 11 to the outlet end 12. At this time, the axis of the valve core frame 31 after installation forms an angle with the axis of the inlet end and the outlet end. This inclined installation method can greatly facilitate the quick extraction of the valve core assembly 3.

[0032] The valve core frame 31 is a hollow round tube component. A partition plate 316 is provided inside the valve core frame 31, which divides the valve core frame 31 into an upper water inlet chamber 314 and a lower water outlet chamber 315. The partition plate 316 is provided with a plurality of water passage holes 311 to connect the water inlet chamber 314 and the water outlet chamber 315 respectively.

[0033] Meanwhile, the upper outer surface of the valve core frame 31 is provided with a water inlet 312, specifically as follows: Figure 6 The diagram shows that the inlet extends radially in an arc shape on the upper outer surface of the valve core frame 31 and is directly connected to the inlet end 11; while the lower outer surface of the valve core frame 31 is provided with an outlet 313, as shown in the diagram. Figure 6 The water outlet shown is a vertical hole set on the lower outer surface of the valve core frame 31, and there are multiple water outlets 313 distributed in a circular pattern. The water outlet cavity 315 can be directly connected to the outlet end 12 through multiple water outlets 313.

[0034] The valve core frame 31 is provided with an adjustment knob 32 for adjusting the flow rate of the inlet 312, and a valve disc 33 driven by the electric actuator 4 to seal and open / close the inlet 312.

[0035] Among them, the adjustment knob 32, for example Figure 7 The diagram shows an integrated component consisting of an upper adjusting shaft 321 and a lower adjusting cover 322. The adjusting shaft 321 is a round shaft, and the adjusting cover 322 is a round cover, with the adjusting shaft 321 and the adjusting cover 322 on the same axis. The adjusting shaft 321 extends upward through the valve cover 2 and is exposed and can rotate. It is usually manually driven to rotate, thereby driving the adjusting cover 322 to rotate synchronously. The adjusting shaft 321 needs to be provided with multiple O-rings 7 to contact the valve cover 2 to form a rotation seal.

[0036] The regulating cover 322 is installed inside the water inlet cavity 314, and an regulating notch 323 extending radially in an arc shape is provided on the lower outer surface of the regulating cover 322. The arc of the regulating notch and the water inlet 312 are both 180° and are on the same horizontal plane. In this way, the regulating shaft 321 drives the regulating cover 322 to rotate in the water inlet cavity 314, which can drive the regulating notch 323 to cooperate with the water inlet 312 to form the flow rate regulation of the water inlet.

[0037] Generally, when the adjustment gap 323 completely overlaps with the water inlet 312, the water inlet flow is the largest; when the adjustment gap 323 is misaligned with the water inlet 312, the larger the misalignment, the smaller the water inlet flow; even when the adjustment gap 323 is completely misaligned with the water inlet 312, it will directly close the water inlet 312.

[0038] The top of the valve cover 2 is provided with a positioning and fitting scale disc 6, which is a disc. A shaft hole 61 is arranged at the center of the scale disc for the adjustment shaft 321 of the adjustment knob 32 to pass through. The top surface of the scale disc 6 is provided with a scale mark 62. Therefore, the size of the water inlet flow can be accurately adjusted by the scale disc 6 in cooperation with the adjustment knob 32.

[0039] The valve disc 33 is composed of a circular sealing ring 331, a circular support ring 332 coaxially arranged above the sealing ring, and a connecting strip 333 respectively connecting the sealing ring and the support ring. The connecting strip can be arranged in multiple and be circumferentially distributed.

[0040] The valve disc 33 is provided with an opening and closing spring 36. The upper end of the opening and closing spring is elastically pushed and installed on the support ring 332. The lower end of the opening and closing spring is elastically pushed and installed on the positioning convexity 317 on the top surface of the partition plate 316. Therefore, under normal circumstances, the opening and closing spring 36 can push the valve disc 33 to always have a tendency to move upward. That is, the opening and closing spring 36 can elastically push on the support ring 332 to drive the valve disc 33 to move upward. Therefore, the opening and closing spring 36 mainly plays a reset function of the valve disc 33.

[0041] The adjustment knob 32 is provided with a vertical valve rod 5. Specifically, the valve rod 5 is installed in the valve rod hole 324 which penetrates along the axis of the adjustment shaft 321. The upper end of the valve rod 5 penetrates out of the adjustment shaft 321 and is connected to the electric actuator 4 to realize remote control. The lower end of the valve rod 5 is fitted in the support ring 332.

[0042] In this way, when the electric actuator 4 drives the valve rod 5 to move downward, the valve disc 33 can be pushed to move downward synchronously to overcome the pushing force of the opening and closing spring 36, and then drive the sealing ring 331 to seal and close the adjustment gap 323, that is, to seal and close the communication between the water inlet 311 and the water inlet cavity 314, so as to finally close the communication between the inlet end 11 and the water inlet cavity 314. When the electric actuator 4 drives the valve rod 5 to move upward, the opening and closing spring 36 releases the elastic potential energy to push the support ring 332 upward, and the valve disc 33 is pushed to move upward synchronously, and then drive the sealing ring 331 to open the adjustment gap 323, that is, to reopen the communication between the water inlet 311 and the water inlet cavity 314, so as to finally open the communication between the inlet end 11 and the water inlet cavity 314.

[0043] The bottom of the valve core frame 31 is provided with a diaphragm 34. The inner circumferential surface of the diaphragm is sealingly fixed on the diaphragm seat 35. The outer circumferential surface of the diaphragm is sealingly fixed on the lower end of the valve core frame 31. Specifically,Figure 1 As shown, the valve core frame is sealed and installed between the inlet end 11 and the outlet end 12, and the outer side of the diaphragm 34 is directly pressed against the valve body 1 through the lower end of the valve core frame to form a circumferential seal. At this time, the water outlet cavity 315 is formed in the valve core frame 31 above the diaphragm 34, that is, the water outlet cavity is closed in the lower part of the valve core frame 31 by the diaphragm 34 to form an independent chamber, and the balance cavity 13 is formed in the valve body 1 below the diaphragm 34.

[0044] The water outlet cavity 315 is provided with a flow stabilizing spring 37, the upper end of which is elastically pushed and installed on the positioning convex 317 on the bottom surface of the partition plate 316, and the lower end of the flow stabilizing spring 37 is elastically pushed and installed on the diaphragm seat 35, so that under normal circumstances, the diaphragm seat 35 always has a downward movement tendency under the elastic pushing of the flow stabilizing spring 37. However, since the balance cavity 13 and the inlet end 11 are directly connected through the balance flow channel 14, the diaphragm seat 35 can dynamically balance the lifting movement according to the water inlet pressure of the inlet end 11 and cooperate with the flow stabilizing spring 37, thereby driving the diaphragm 34 to dynamically adjust the flow of the water outlet 313. Therefore, the flow stabilizing spring 37 mainly plays a role in stabilizing the flow.

[0045] In addition, the valve core frame 31, the adjusting knob 32, the valve flap 33, the diaphragm seat 35, and the scale disc 6 are all injection molded from engineering plastics, which is extremely convenient for processing and manufacturing.

[0046] The working process of the electrically adjustable dynamic flow balancing valve is as follows: the medium in the inlet end 11 enters the water inlet cavity 314 from the water inlet 312 of the valve core assembly 3, and the water inlet flow can be adjusted by operating the rotation of the adjusting knob 32, and the valve flap 33 can also be sealed and opened by remotely controlling the up and down movement of the valve rod 5 through the electric actuator 4; then, the medium in the water inlet cavity 314 enters the water outlet cavity 315 through the water passage hole 311, and forms a dynamic balance structure through the diaphragm 34, the diaphragm seat 35 and the flow stabilizing spring 37, and cooperates with the lifting movement of the diaphragm seat 35 to drive the diaphragm 34 to adjust the water outlet 313, so that the medium in the water outlet cavity 315 flows out from the outlet end 12 through the water outlet 313.

[0047] The working principle of the dynamic balance is as follows: the medium pressure P1 of the inlet end 11 is guided to the balance cavity 13 below the diaphragm 34 through the balance flow channel 14, a pushing force of the diaphragm 34 upward is formed, and the pushing force of the diaphragm 34 upward and the elastic force F of the steady flow spring 37 together form a resultant force, which makes the forces above and below the diaphragm 34 form a balance state, if the medium pressure P1 of the inlet end 11 increases, the force below the diaphragm 34 also increases, the diaphragm is driven to move upward until the elastic force F of the steady flow spring 37 increases to form a new force balance, at the same time, the water outlet 313 at the lower part of the valve core frame 31 is blocked by the diaphragm 34, the water outlet is reduced, the difference between the medium pressure P1 of the inlet end 11 and the medium pressure P3 of the outlet end 12 is increased, and the flow through the valve remains unchanged.

[0048] The medium of the utility model adopts the way of going in from the top and going out from the bottom, the valve body 1 cooperates with the valve core assembly 3 and adopts the inclined structure design, the valve core assembly 3 adopts the extractable structure, can integrate the functions of sealing opening and closing, adjusting water inflow, and stabilizing and adjusting water outflow, so the structure design is more compact, has the advantages of simple structure, good flow stabilizing effect, large flow adjusting range, convenient maintenance and the like, simultaneously makes the structure of the valve body greatly simplify, facilitates the machining assembly and mass production of the valve body interior, is applicable to various pipelines needing dynamic balance valve, has strong practicality.

[0049] The above only is the specific embodiment of the utility model, and the person skilled in the art should understand that any structure design equivalent to the embodiment should be contained in the protection scope of the utility model.

Claims

1. An electrically adjustable dynamic flow balance valve, comprising a valve body (1), a valve cover (2) sealingly mounted on the top of the valve body, a valve core assembly (3) arranged in the valve cover and the valve body, and an electric actuator (4) mounted on the valve cover (2); the valve body (1) is provided with an inlet end (11) and an outlet end (12) at two ends respectively, characterized in that, the valve core assembly (3) comprises a valve core frame (31) sealingly mounted between the inlet end (11) and the outlet end (12), the upper outer surface of the valve core frame is provided with a water inlet (312) communicating with the inlet end (11), and the lower outer surface of the valve core frame is provided with a water outlet (313) communicating with the outlet end (12); the valve core frame (31) is provided with an adjusting knob (32) for adjusting the flow of the water inlet (312), and a valve flap (33) sealingly opening and closing the water inlet (312) driven by the electric actuator (4); the bottom of the valve core frame (31) is provided with a diaphragm (34), the inner side of the diaphragm is sealingly fixed on a diaphragm seat (35), the outer side of the diaphragm is sealingly fixed on the lower end of the valve core frame (31), the valve core frame (31) above the diaphragm (34) forms a water outlet cavity (315), the valve body (1) below the diaphragm (34) forms a balance cavity (13), the water outlet cavity (315) is provided with a steady flow spring (37) for elastically pushing the diaphragm seat (35) to move downward, the balance cavity (13) directly communicates with the inlet end (11), and dynamically balances the lifting movement of the diaphragm seat (35) according to the water inlet pressure of the inlet end (11), thereby driving the diaphragm (34) to dynamically adjust the flow of the water outlet (313).

2. The electrically motorized adjustable dynamic flow balance valve of claim 1, wherein the valve core frame (31) is provided with a water inlet cavity (314) at the upper part and a water outlet cavity (315) at the lower part, and a water passage (311) communicating the water inlet cavity and the water outlet cavity.

3. The electrically motorized adjustable dynamic flow balance valve of claim 1, wherein the water inlet (312) is radially and arcuately arranged on the upper outer surface of the valve core frame (31), and the water outlet (313) is a vertical hole arranged on the lower outer surface of the valve core frame (31), the water outlet is provided with a plurality of and is circumferentially distributed.

4. The electrically motorized adjustable dynamic flow balance valve of claim 1, wherein the adjusting knob (32) is composed of an adjusting shaft (321) at the upper part and an adjusting cover (322) at the lower part, the adjusting cover is mounted in the water inlet cavity (314), and the lower outer surface of the adjusting cover (322) is provided with an adjusting recess (323) extending radially and arcuately; the adjusting shaft (321) drives the adjusting cover (322) to rotate in the water inlet cavity (314), and drives the adjusting recess (323) to cooperate with the water inlet (312) to form the flow adjustment of the water inlet.

5. The electrically motorized adjustable dynamic flow balance valve of claim 4, wherein the radii of the water inlet (312) and the adjusting recess (323) are both 180° and are on the same horizontal plane.

6. The electrically motorized adjustable dynamic flow balance valve of claim 4, wherein The valve clack (33) is composed of a sealing ring (331), a support ring (332) coaxially arranged above the sealing ring, and a connecting strip (333) connecting the sealing ring and the support ring, respectively, the valve clack (33) is provided with an opening and closing spring (36) and is elastically pushed on the support ring (332) by the opening and closing spring to drive the valve clack (33) to move upward, the adjusting knob (32) is provided with a valve rod (5) vertically installed, the upper end of the valve rod is connected to the electric actuator (4), and the lower end of the valve rod is fitted in the support ring (332); the electric actuator (4) drives the valve rod (5) to move downward and pushes the valve clack (33) to move downward synchronously to drive the sealing ring (331) to seal the adjusting gap (323) and then seal the communication between the water inlet (312) and the water inlet cavity (314); the electric actuator (4) drives the valve rod (5) to move upward, the opening and closing spring (36) pushes the support ring (332) upward, and the valve clack (33) is pushed to move upward synchronously to drive the sealing ring (331) to open the adjusting gap (323), thereby realizing the communication between the water inlet (312) and the water inlet cavity (314).

7. The electrically motorized adjustable dynamic flow balance valve of claim 2, wherein The valve core frame (31) is provided with a partition plate (316), and the valve core frame (31) is divided into a water inlet cavity (314) and a water outlet cavity (315) by the partition plate.

8. The electrically motorized adjustable dynamic flow balance valve of claim 1, wherein The valve core frame (31) is obliquely and sealingly installed between the inlet end (11) and the outlet end (12), and the axis of the valve core frame (31) forms an angle with the axes of the inlet end (11) and the outlet end (12).

9. The electrically motorized adjustable dynamic flow balance valve of claim 1, wherein The valve cover (2) is detachably and sealingly installed on the top of the valve body (1), and the valve cover (2) is removed from the top of the valve body, and the valve core assembly (3) is extracted from the top of the valve body.

10. The electrically motorized adjustable dynamic flow balance valve of claim 1, wherein The top of the valve cover (2) is provided with a positioning and fitting scale disc (6).

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