A low-vibration and high-precision dynamic flow balancing valve

Abstract

The present invention discloses a low-vibration high-precision dynamic flow balancing valve, and relates to the field of balancing valves. The present invention includes a valve body and a valve core assembly, the valve core assembly includes a valve core, a valve core housing and a locking screw, an inner hole is provided in the valve body, the valve core housing is arranged in the inner hole, the locking screw is threadedly connected to the inner wall of the upper end of the valve core housing, a buffer assembly arranged inside the valve core housing and an adjustment assembly arranged on the valve core; the buffer assembly includes a buffer assembly including a first main spring, a second main spring, a limit block, a center spring and a side spring, the adjustment assembly includes a variable hole, a circular hole and a movable part, and the valve core is provided with a plurality of variable holes and a plurality of circular holes, which are conducive to distributing water flow and pressure difference, reducing the force of the valve gallbladder, and preventing vibration. When the working pressure difference increases, a multi-stage pressure reduction structure is formed at the fitting position to reduce the unbalanced force of the fluid on the valve core and the vibration of the valve core.

Description

Technical Field

[0001] The invention relates to the field of balancing valves, and in particular to a low-vibration and high-precision dynamic flow balancing valve. Background Art

[0002] The dynamic flow balancing valve is also called self-operated flow control valve, self-operated balancing valve, constant flow valve, automatic balancing valve, etc. It automatically changes the resistance coefficient according to the changes in the system operating conditions. Within a certain pressure difference range, it can effectively control the flow rate passing through to maintain a constant value. That is, when the pressure difference before and after the valve increases, the automatic closing action of the valve can keep the flow rate from increasing. Conversely, when the pressure difference decreases, the valve automatically opens and the flow rate remains constant.

[0003] Under the existing technology, during the operation of the balancing valve, after long-term operation, the control progress becomes worse, and the control of the variable hole is poor. During operation, the matching clearance between the valve core and the valve housing is difficult to control. When the working pressure difference is exceeded, the vibration of the valve core is larger and the noise is larger. Summary of the invention

[0004] The purpose of the present invention is to provide a low-vibration and high-precision dynamic flow balancing valve to solve the problem that the control progress of the balancing valve deteriorates after long-term operation during operation, and the control of the variable hole is poor. When working, the matching clearance between the valve core and the valve housing is difficult to control. When the working pressure difference is exceeded, the vibration of the valve core is large and the noise is large.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a low-vibration, high-precision dynamic flow balancing valve, comprising a valve body and a valve core assembly, wherein the valve core assembly comprises a valve core, a valve core housing and a locking screw, wherein an inner hole is provided in the valve body, the valve core housing is arranged in the inner hole, the locking screw is threadedly connected to the inner wall of the upper end of the valve core housing, a buffer assembly is arranged inside the valve core housing and an adjusting assembly is arranged on the valve core;

[0007] The buffer assembly includes a first main spring, a second main spring, a limit block, a center spring and a side spring. The lower end of the valve core housing is connected to the first main spring. The locking screw is provided with a second main spring. The first main spring and the second main spring are both connected to a limit block. A center spring and a plurality of side springs are provided between the two limit blocks. The center spring is located at the center of the limit block, and the plurality of side springs are located at the edge of the limit block. The plurality of side springs are arranged equidistantly in a circular array.

[0008] Among them, when buffering, first of all, the two main springs, the first main spring and the second main spring are mainly used to buffer the pressure at both ends of the valve core housing, and the main springs are limited by limit blocks, and the two limit blocks are connected by the center spring and the side spring. The center spring is larger in size and mainly buffers the vibration force between the two limit blocks to prevent the spring from being over-compressed, so that the spring is within the normal working compression stroke, ensuring the life of the spring and the life of the product. Through the cooperation of the side spring and the center spring, one of the side springs can be squeezed to make the two limit blocks form a certain angle, which is beneficial to the distribution of water flow and pressure difference, reduce the force of the valve gallbladder, and prevent vibration. When the working pressure difference increases, a multi-stage pressure reduction structure is formed at the cooperation point to reduce the unbalanced force of the fluid on the valve core and the vibration of the valve core.

[0009] The regulating assembly includes a variable hole, a circular hole and a movable part. The valve core is provided with a plurality of variable holes and a plurality of circular holes. The variable holes are of a diamond structure, and every two of the variable holes are connected to each other. The circular hole is connected to the variable hole. A movable part is provided in the circular hole. The movable part includes a connecting shaft, a fan blade, a rotating shaft and a side blade. A plurality of connecting shafts are movably provided in the circular hole, wherein a fan blade is provided between two connecting shafts, and a rotating shaft is movably provided on both sides of each fan blade, and the two rotating shafts are connected to the side blades.

[0010] Among them, the variable holes on the side of the valve core are symmetrically distributed, which is convenient for processing. Under large flow, the variable holes are divided into four from the usual two, which improves the rigidity of the valve core and meets the flow demand. The fan blades are rotated through the connecting shaft. According to the force of the fluid, the fan blades are rotated to adjust the size of the circular hole flow area. The two sides of the fan blades can also be adjusted movably for easy control. The cooperation of the two can control the flow rate of the fluid when the angle between the fan blade and the side blade is different, indirectly control the flow rate and achieve flow balance.

[0011] Preferably, the two ends of the valve body are respectively connected to a flange, the flanges are symmetrically arranged along the central axis of the valve body, the upper end outer wall of the valve core housing is matched with the inner hole of the valve body, and the valve body is installed through the flange matching.

[0012] Preferably, a valve seat hole is provided inside the valve body, and the lower end outer wall of the valve core housing and the valve seat hole of the valve body are sealed with end faces.

[0013] Preferably, a valve cover is installed on the top of the valve core housing, a flange is provided on the upper opening of the valve core, and a step is provided on the inner wall of the lower end of the valve core housing to cooperate with the flange to limit the valve core.

[0014] Preferably, a first sealing ring is installed between the lower end outer wall of the valve core housing and the valve seat hole of the valve body, and a second sealing ring is installed between the valve cover and the valve body.

[0015] Preferably, the valve cover is connected to the valve body via threads.

[0016] Preferably, the variable holes are of a diamond structure, and the flow areas of every two connected variable holes are different.

[0017] Preferably, the size of the first main spring is larger than that of the second main spring, and the number of turns of the second main spring is larger than that of the first main spring.

[0018] Preferably, the fan blades are of a rectangular structure, and a plurality of the fan blades are arranged equidistantly in a circular array.

[0019] The present invention has the following beneficial effects:

[0020] 1. When the present invention is buffering, firstly, the two main springs, the first main spring and the second main spring, are mainly used to buffer the pressure at both ends of the valve core housing, and the main springs are limited by limit blocks, and the two limit blocks are connected by the center spring and the side springs. The center spring is larger in size and mainly buffers the vibration force between the two limit blocks, which can prevent the spring from being over-compressed, so that the spring is within the normal working compression stroke, ensuring the life of the spring and the life of the product. Through the cooperation of the side spring and the center spring, one of the side springs can be squeezed to make the two limit blocks form a certain angle, which is beneficial to distribute the water flow and the pressure difference, reduce the force of the valve gallbladder, and prevent vibration. When the working pressure difference increases, a multi-stage pressure reduction structure is formed at the cooperation position to reduce the unbalanced force of the fluid on the valve core and the vibration of the valve core.

[0021] 2. The present invention has symmetrically distributed variable holes on the side of the valve core, which is easy to process. Under large flow, the variable holes are divided into four from the usual two, which improves the rigidity of the valve core and meets the flow demand. The fan blades are rotated by the connecting shaft. According to the force of the fluid, the fan blades are rotated to adjust the size of the circular hole flow area. The two sides of the fan blades can also be adjusted movably to facilitate control. The cooperation of the two can control the flow velocity of the fluid when the angle between the fan blade and the side blade is different, indirectly control the flow rate, and achieve flow balance.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0026] Figure 3 For the present invention Figure 2 Sectional view at AA;

[0027] Figure 4 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0028] Figure 5 For the present invention Figure 3 A partial enlarged view of point C in the middle;

[0029] Figure 6 For the present invention Figure 3 A partial enlarged view of point D in the middle;

[0030] Figure 7 It is a schematic diagram of the layout of the limit block, the center spring and the side spring of the present invention;

[0031] Figure 8 It is a schematic diagram of the circular hole structure of the present invention.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 110. Valve body; 120. Valve core; 130. Valve core housing; 140. Locking screw; 210. First main spring; 220. Second main spring; 230. Limit block; 240. Center spring; 250. Side spring; 310. Variable hole; 320. Round hole; 330. Connecting shaft; 340. Fan blade; 350. Rotating shaft; 360. Side blade; 410. Flange; 420. Valve cover; 430. Flange; 440. Step; 450. First sealing ring; 460. Second sealing ring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] See also Figure 1-6 As shown, this embodiment lists a low-vibration high-precision dynamic flow balancing valve, including a valve body 110 and a valve core assembly, the valve core assembly includes a valve core 120, a valve core housing 130 and a locking screw 140, an inner hole is opened in the valve body 110, the valve core housing 130 is arranged in the inner hole, the locking screw 140 is threadedly connected to the inner wall of the upper end of the valve core housing 130, a buffer assembly arranged inside the valve core housing 130 and an adjusting assembly arranged on the valve core 120;

[0037] The buffer assembly includes a first main spring 210, a second main spring 220, a stop block 230, a center spring 240 and a side spring 250. The lower end of the valve core housing 130 is connected to the first main spring 210, and the locking screw 140 is provided with the second main spring 220. The first main spring 210 and the second main spring 220 are both connected to a stop block 230. A center spring 240 and a plurality of side springs 250 are provided between the two stop blocks 230. The center spring 240 is located at the center of the stop block 230, and the plurality of side springs 250 are located at the edge of the stop block 230. The plurality of side springs 250 are arranged equidistantly in a circular array.

[0038] Among them, when buffering, firstly, the two main springs, the first main spring 210 and the second main spring 220 are mainly used to buffer the pressure at both ends of the valve core housing 130, and the main springs are limited by the limit blocks 230, and the two limit blocks 230 are connected by the center spring 240 and the side springs 250. The center spring 240 is larger in size and mainly buffers the vibration force between the two limit blocks 230, which can prevent the spring from being over-compressed, so that the spring is within the normal working compression stroke, ensuring the life of the spring and the life of the product. Through the cooperation of the side springs 250 and the center spring 240, one of the side springs 250 can be squeezed to make the two limit blocks 230 present a certain angle, which is beneficial to distribute the water flow and pressure difference, reduce the force of the valve gallbladder, and prevent vibration. When the working pressure difference increases, a multi-stage pressure reduction structure is formed at the cooperation point to reduce the unbalanced force of the fluid on the valve core and the vibration of the valve core.

[0039] The regulating assembly includes a variable hole 310, a circular hole 320 and a movable part. The valve core 120 is provided with a plurality of variable holes 310 and a plurality of circular holes 320. The variable holes 310 are of a rhombus structure, and every two variable holes 310 are communicated with each other. The circular holes 320 are communicated with the variable holes 310. A movable part is provided in the circular hole 320. The movable part includes a connecting shaft 330, a fan blade 340, a rotating shaft 350 and a side blade 360. A plurality of connecting shafts 330 are movably provided in the circular hole 320, wherein a fan blade 340 is provided between two connecting shafts 330, and a rotating shaft 350 is movably provided on both sides of each fan blade 340, and the two rotating shafts 350 are connected to the side blade 360.

[0040] In this embodiment, the variable holes 310 on the side of the valve core 120 are symmetrically distributed, which is convenient for processing. Under large flow, the variable holes 310 are divided into four from the usual two, thereby improving the rigidity of the valve core 120 and meeting the flow demand. The fan blades 340 are rotated through the connecting shaft 330. According to the force of the fluid, the fan blades 340 are rotated to adjust the size of the flow area of ​​the circular hole 320. The two sides of the fan blades 340 can also be adjusted movably to facilitate control. The cooperation of the two can control the flow speed of the fluid when the angle between the fan blades 340 and the side blades 360 is different, indirectly control the flow rate, and achieve flow balance.

[0041] The valve body 110 is connected to two ends thereof with a flange 410 symmetrically arranged along the central axis of the valve body 110 . The upper outer wall of the valve core housing 130 is matched with the inner hole of the valve body 110 . The valve body 110 is installed by matching with the flange 410 .

[0042] A valve seat hole is provided inside the valve body 110 , and the lower end outer wall of the valve core housing 130 and the valve seat hole of the valve body 110 are sealed with an end face.

[0043] A valve cover 420 is installed at the top of the valve core housing 130 , a flange 430 is provided on the upper opening of the valve core 120 , and a step 440 is provided on the inner wall of the lower end of the valve core housing 130 to cooperate with the flange 430 to limit the valve core 120 .

[0044] A first sealing ring 450 is installed between the outer wall of the lower end of the valve core housing 130 and the valve seat hole of the valve body 110 , and a second sealing ring 460 is installed between the valve cover 420 and the valve body 110 .

[0045] The valve cover 420 is connected to the valve body 110 via threads.

[0046] The variable holes 310 are of a diamond structure, and the flow areas of every two connected variable holes 310 are different;

[0047] In this embodiment, the valve core is provided with an end surface fixed hole and a symmetrical side flow channel on both sides. The side flow channel includes a circular hole 320 and two or four evenly distributed variable holes 310. One circular hole 320 is connected to two of the symmetrically distributed variable holes 310 one by one.

[0048] The size of the first main spring 210 is greater than that of the second main spring 220 , and the number of turns of the second main spring 220 is greater than that of the first main spring 210 .

[0049] The fan blades 340 are rectangular parallelepiped structures, and a plurality of fan blades 340 are arranged equidistantly in a circular array.

[0050] The present invention discloses a low-vibration high-precision dynamic flow balancing valve. When in use, the fluid flows from the right side of the valve body 110 to the left side of the valve body 110 through the end surface fixed hole and the side flow channel. There is a pressure difference between the inside and outside of the valve core 120. When the pressure difference does not reach the minimum working pressure difference of the high-precision dynamic flow balancing valve, the position of the valve core 120 remains unchanged. At this time, the flow area on the side of the valve core 120 is the largest, and the flow rate increases with the increase of the pressure difference. When the pressure difference reaches or exceeds the minimum working pressure difference of the high-precision dynamic flow balancing valve and is not greater than the maximum working pressure difference, the valve core 120 is in a state of being ... 120 slides relatively along the inner wall of the valve core housing 130. At this time, a part of the variable hole 310 is blocked by the valve core housing 130, thereby reducing the flow area so that the pressure difference between the inside and outside of the end surface fixed hole is zero, achieving the purpose of flow balance. At this time, the flow remains unchanged when the pressure difference increases; when the pressure difference reaches or exceeds the maximum working pressure difference of the high-precision dynamic flow balancing valve, the valve core 120 is blocked and the position remains unchanged. At this time, only the fixed circular hole 320 is left on the side of the valve core 120. Since the flow area remains unchanged, the flow increases with the increase of the flow velocity;

[0051] When buffering, firstly, the two main springs, the first main spring 210 and the second main spring 220, are mainly used to buffer the pressure at both ends of the valve core housing 130, and the main springs are limited by the limit block 230, and the two limit blocks 230 are connected by the central spring 240 and the side spring 250. The central spring 240 is relatively large in size and mainly buffers the vibration force between the two limit blocks 230, which can prevent the spring from being over-compressed, so that the spring is within the normal working compression stroke, ensuring the life of the spring and the life of the product. Through the cooperation of the side spring 250 and the central spring 240, the two limit blocks 230 can be at a certain angle by squeezing one of the side springs 250, which is conducive to distributing the water flow and the pressure difference, reducing the force of the valve gallbladder, and preventing vibration. When the working pressure difference increases, a multi-stage pressure reduction structure is formed at the cooperation position to reduce the unbalanced force of the fluid on the valve core 120 and the vibration of the valve core 120;

[0052] The variable holes 310 on the side of the valve core 120 are symmetrically distributed, which is convenient for processing. Under large flow, the variable holes 310 are divided into four from the usual two, which improves the rigidity of the valve core 120 and meets the flow demand. The fan blades 340 are rotated through the connecting shaft 330. According to the force of the fluid, the fan blades 340 are rotated to adjust the size of the flow area of ​​the circular hole 320. The two sides of the fan blades 340 can also be adjusted movably to facilitate control. The cooperation of the two can control the flow speed of the fluid when the angle between the fan blades 340 and the side blades 360 is different, indirectly control the flow rate, and achieve flow balance.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-vibration, high-precision dynamic flow balancing valve, comprising a valve body (110) and a valve core assembly, wherein the valve core assembly comprises a valve core (120), a valve core housing (130) and a locking screw (140), wherein an inner hole is provided in the valve body (110), the valve core housing (130) is arranged in the inner hole, and the locking screw (140) is threadedly connected to the inner wall of the upper end of the valve core housing (130), characterized in that: A buffer component disposed inside the valve core housing (130) and an adjustment component disposed on the valve core (120); The buffer assembly comprises a first main spring (210), a second main spring (220), a limit block (230), a center spring (240) and a side spring (250); the lower end of the valve core housing (130) is connected to the first main spring (210); the locking screw (140) is provided with a second main spring (220); the first main spring (210) and the second main spring (220) are both connected to a limit block (230); a center spring (240) and a plurality of side springs (250) are provided between the two limit blocks (230); the center spring (240) is located at the center of the limit block (230); the plurality of side springs (250) are located at the edge of the limit block (230); and the plurality of side springs (250) are arranged equidistantly in a circular array; The regulating component comprises a variable hole (310), a circular hole (320) and a movable part. The valve core (120) is provided with a plurality of variable holes (310) and a plurality of circular holes (320). The variable holes (310) are of a diamond structure, and every two of the variable holes (310) are communicated with each other. The circular hole (320) is communicated with the variable hole (310). A movable part is provided in the circular hole (320), and the movable part comprises a connecting shaft (330), a fan blade (340), a rotating shaft (350) and a side blade (360). A plurality of connecting shafts (330) are movably provided in the circular hole (320), wherein a fan blade (340) is provided between two connecting shafts (330), and a rotating shaft (350) is movably provided on both sides of each fan blade (340), and the two rotating shafts (350) are connected to the side blade (360).

2. A low-vibration, high-precision dynamic flow balancing valve according to claim 1, characterized in that: The two ends of the valve body (110) are respectively connected to a flange (410), and the flange (410) is symmetrically arranged along the central axis of the valve body (110). The upper end outer wall of the valve core housing (130) is matched with the inner hole of the valve body (110).

3. The low-vibration and high-precision dynamic flow balancing valve according to claim 1 is characterized in that: A valve seat hole is provided inside the valve body (110), and the lower end outer wall of the valve core housing (130) and the valve seat hole of the valve body (110) are sealed with an end face.

4. The low-vibration and high-precision dynamic flow balancing valve according to claim 1 is characterized in that: A valve cover (420) is installed at the top of the valve core housing (130), a flange (430) is provided on the upper opening of the valve core (120), and a step (440) is provided on the inner wall of the lower end of the valve core housing (130) for cooperating with the flange (430) to limit the valve core (120).

5. A low-vibration, high-precision dynamic flow balancing valve according to claim 4, characterized in that: A first sealing ring (450) is installed between the lower end outer wall of the valve core housing (130) and the valve seat hole of the valve body (110), and a second sealing ring (460) is installed between the valve cover (420) and the valve body (110).

6. A low-vibration, high-precision dynamic flow balancing valve according to claim 5, characterized in that: The valve cover (420) is connected to the valve body (110) via threads.

7. A low-vibration, high-precision dynamic flow balancing valve according to claim 6, characterized in that: The variable holes (310) are of a diamond-shaped structure, and the flow areas of every two connected variable holes (310) are different.

8. The low-vibration, high-precision dynamic flow balancing valve according to claim 6, characterized in that: The size of the first main spring (210) is larger than that of the second main spring (220), and the number of turns of the second main spring (220) is larger than that of the first main spring (210).

9. The low-vibration and high-precision dynamic flow balancing valve according to claim 1, characterized in that: The fan blades (340) are of a rectangular parallelepiped structure, and a plurality of the fan blades (340) are arranged at equal distances in a circular array.

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