High-precision Venturi effect flow control bracket mechanism, damper and valve body

Abstract

The present application relates to the field of Venturi effect valves, and discloses a high-precision Venturi effect flow control bracket mechanism, a damper, and a valve body. The bracket mechanism includes: a movable shaft, which is arranged axially along the Venturi cylinder and is coaxial with the valve core assembly; a fixed connector, which is fixed to the valve core assembly and fixedly connected to one end of the movable shaft near the valve core assembly; a sliding connector, which is sleeved on the movable shaft and slides with the movable shaft and limits the radial displacement of the movable shaft; at least three movable bracket units, which are evenly distributed around the movable shaft in the circumferential direction, and each movable bracket unit includes: a cylinder fixing arm, a valve core restraining arm, and a dynamic balancing arm. When the valve core assembly moves axially along the movable shaft, the radial displacement of the valve core assembly is synchronously restrained by the cooperation between the movable shaft, the sliding connector, and the movable bracket unit, thereby maintaining the coaxiality of the valve core assembly and the Venturi cylinder.

Description

Technical Field

[0001] The present application relates to the field of Venturi effect valves, and in particular to a high-precision Venturi effect flow control bracket mechanism, a damper, and a valve body. Background Art

[0002] Existing Venturi-effect valves primarily support the valve core in two ways: one uses fixed supports on both ends, such as the push rod device disclosed in patent document CN218780838U. This requires fixed support structures on both sides of the valve body, and a longer cylinder is required to cover the valve travel space, which increases the overall length of the valve and makes it difficult to adapt to compact piping systems. The other uses a single-sided cantilever support, such as the push rod actuator structure mentioned in patent document CN217842729U. Specifically, a cantilever support structure is used on one side of the valve core. Although this can shorten the length, it requires lengthening the cantilever or sacrificing centering to maintain stability. This can easily cause deflection due to the weight of the valve core or fluid pressure, affecting control accuracy. The above-mentioned existing technologies have the following problems: the valve length is limited, making it difficult to adapt to narrow installation environments; the cantilever support can easily cause radial offset of the valve core, reducing flow control accuracy; the long cylinder has high material and transportation costs, and increases installation complexity. Summary of the Invention

[0003] In order to solve the problems of the existing technology such as the valve being too long, the valve core being insufficiently neutral, and the poor adaptability to the installation space, this application provides a high-precision Venturi effect flow control bracket mechanism. The specific solution is as follows:

[0004] The high-precision Venturi effect flow control bracket mechanism is arranged in the Venturi cylinder and is used for the movable connection between the valve core assembly and the Venturi cylinder. The high-precision Venturi effect flow control bracket mechanism includes:

[0005] A movable shaft is arranged along the axial direction of the Venturi cylinder and is coaxial with the valve core assembly;

[0006] A fixed connecting piece is fixedly mounted on the valve core assembly and is fixedly connected to one end of the movable shaft close to the valve core assembly;

[0007] a sliding connector, sleeved on the movable shaft and slidingly engaged with the movable shaft, and limiting radial displacement of the movable shaft;

[0008] At least three movable support units are uniformly distributed around the movable axis in the circumferential direction, and each movable support unit includes:

[0009] a cylinder fixing arm, one end of which is fixed to the inner wall of the Venturi cylinder;

[0010] a valve core restraining arm, one end of which is hinged to the fixed connecting member;

[0011] a dynamic balancing arm, one end of which is hinged to the sliding connection;

[0012] The other end of the cylinder fixing arm, the other end of the valve core restraining arm and the other end of the dynamic balancing arm are hinged to each other;

[0013] When the valve core assembly moves along the axial direction of the movable shaft, the radial displacement of the valve core assembly is synchronously constrained by the cooperation between the movable shaft, the sliding connector and the movable bracket unit, thereby maintaining the coaxiality of the valve core assembly and the venturi cylinder.

[0014] Preferably, the articulation between the valve core restraint arm and the fixed connection, the articulation between the dynamic balancing arm and the sliding connection, and the articulation between the cylinder fixed arm, the valve core restraint arm and the dynamic balancing arm are all achieved through a pin; the axis of the pin is perpendicular to the axial direction of the movable shaft to allow each arm to rotate freely around the axis of the pin.

[0015] Preferably, three movable bracket units are provided, and the three movable bracket units are evenly distributed circumferentially with the movable axis as the center, and the angle between adjacent movable bracket units is 120°.

[0016] Preferably, four movable bracket units are provided, and the four movable bracket units are evenly distributed circumferentially with the movable axis as the center, and the angle between adjacent movable bracket units is 90°.

[0017] The present application also provides a high-precision Venturi effect flow control damper, comprising: the above-mentioned bracket mechanism, a damping cylinder, an elastic component, a first end cover, a second end cover and a piston, the damping cylinder passes through the valve core of the valve core assembly, the damping cylinder is coaxially arranged with the valve core of the valve core assembly and is fixedly connected to the valve core of the valve core assembly, the first end of the damping cylinder is fixedly provided with a first end cover, the second end of the damping cylinder is fixedly provided with a second end cover, the piston is arranged in the damping cylinder and slides with the damping cylinder, the first end cover is passed through by the movable shaft of the bracket mechanism, the movable shaft is fixedly connected to the piston, the elastic component is arranged between the first end cover and the piston, and when the first end cover moves relative to the piston, the elastic component can limit the movement of the first end cover.

[0018] The present application also provides a high-precision Venturi effect flow control valve body, comprising: a Venturi cylinder, a valve core assembly, and a bracket mechanism, wherein the valve core assembly is movably connected to the Venturi cylinder through the bracket mechanism.

[0019] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0020] 1. The coordinated design of the movable bracket unit and the sliding connector eliminates the limitations of traditional fixed brackets at both ends, reducing the overall length of the Venturi effect valve to adapt to compact piping systems. In addition, the shortened Venturi cylinder reduces material consumption. At the same time, since only one end needs to be fixed, the installation process is simplified, reducing manufacturing and maintenance costs.

[0021] 2. The movable bracket unit is a connecting rod mechanism formed by three hinged arms. It dynamically constrains radial displacement when the valve core assembly moves axially, controls the coaxiality error between the valve core assembly and the Venturi cylinder, enhances the centering of the valve core, and thus improves flow control accuracy.

[0022] 3. By selecting 3 or 4 movable bracket units evenly distributed around the circumference, it can adapt to different load requirements while taking into account stability and redundancy;

[0023] 4. The damper can improve the stability of the valve core assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in this application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0025] Figure 1 This is a schematic diagram of the high-precision Venturi effect flow control bracket mechanism of the present application installed in the Venturi cylinder;

[0026] Figure 2 This is a schematic structural diagram of the high-precision Venturi effect flow control bracket mechanism of the present application from a first perspective;

[0027] Figure 3 2 is a schematic structural diagram of the high-precision Venturi effect flow control bracket mechanism of the present application from a second perspective;

[0028] Figure 4 It is a schematic diagram of the high-precision Venturi-effect flow control damper of the present application being arranged on the valve core;

[0029] Figure 5 It is a schematic diagram of a Venturi valve and a valve core assembly in the prior art.

[0030] In the figure: 1. Venturi cylinder; 2. Valve core assembly; 31. Cylinder fixing arm; 32. Valve core restraining arm; 33. Dynamic balancing arm; 41. Fixed connecting piece; 42. Sliding connecting piece; 5. Movable shaft; 61. Damping cylinder; 62. Elastic assembly; 63. First end cover; 64. Second end cover; 65. Piston. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described in this application are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a high-precision Venturi effect flow control bracket mechanism installed in a Venturi cylinder. The high-precision Venturi effect flow control bracket mechanism is located in the Venturi cylinder 1 and is used for the movable connection between the valve core assembly 2 and the Venturi cylinder 1. The high-precision Venturi effect flow control bracket mechanism includes:

[0033] A movable shaft 5 is axially arranged along the venturi cylinder 1 and coaxial with the valve core assembly 2;

[0034] The fixed connecting piece 41 is fixedly provided on the valve core assembly 2 and is fixedly connected to one end of the movable shaft 5 close to the valve core assembly 2, that is, the movable shaft 5 is fixedly connected to the valve core assembly 2 through the fixed connecting piece 41; alternatively, the movable shaft 5 can be directly fixedly connected to the valve core assembly 2, the fixed connecting piece 41 and the movable shaft 5 are fixedly connected by a top screw, and the movable shaft 5 is provided with a retaining spring groove, and the stability of the fixed connection between the fixed connecting piece 41 and the movable shaft 5 is further enhanced by setting the retaining spring groove and the retaining spring.

[0035] The sliding connector 42 is sleeved on the movable shaft 5 and forms an axial sliding fit with the movable shaft 5, thereby limiting the radial displacement of the movable shaft 5. Specifically, when the valve core assembly 2 is adjusted, the movable shaft 5 is prevented from radially moving. If the movable shaft 5 moves radially, the adjustment accuracy will be affected.

[0036] At least three movable support units are uniformly distributed around the movable shaft 5 in the circumferential direction, and each movable support unit includes:

[0037] A cylinder fixing arm 31, one end of which is fixed to the inner wall of the Venturi cylinder 1;

[0038] The valve core restraining arm 32 has one end hinged to the fixed connecting member 41;

[0039] A dynamic balancing arm 33, one end of which is hinged to the sliding connection member 42;

[0040] The other end of the cylinder fixing arm 31, the other end of the valve core restraining arm 32 and the other end of the dynamic balancing arm 33 are hinged to each other;

[0041] By driving the movable shaft 5 to move axially, the valve core assembly 2 can be moved along the axial direction of the movable shaft 5, thereby controlling the opening of the Venturi effect valve; when the valve core assembly 2 moves along the axial direction of the movable shaft 5, the movable shaft 5 cooperates with the sliding connection 42 and the movable bracket unit to synchronously constrain the radial displacement of the valve core assembly 2, maintain the coaxiality of the valve core assembly 2 and the Venturi cylinder 1, thereby achieving precise control of the Venturi effect valve.

[0042] For details, please refer to Figure 2 and Figure 3 The articulation between the valve core restraining arm 32 and the fixed connection 41, the articulation between the dynamic balancing arm 33 and the sliding connection 42, and the articulation between the cylinder fixed arm 31, the valve core restraining arm 32 and the dynamic balancing arm 33 are all achieved through a pin; the axis of the pin is perpendicular to the axial direction of the movable shaft 5 to allow each arm to rotate freely around the axis of the pin.

[0043] For details, please refer to Figure 2 There are three movable bracket units, which are evenly distributed circumferentially with the movable axis 5 as the center, and the angle between adjacent movable bracket units is 120°.

[0044] Specifically, four movable bracket units are provided, and the four movable bracket units are evenly distributed circumferentially with the movable shaft 5 as the center, and the angle between adjacent movable bracket units is 90°.

[0045] The present application also provides a high-precision Venturi effect flow control damper, which includes: the above-mentioned high-precision Venturi effect flow control bracket mechanism, a damping cylinder 61, an elastic component 62, a first end cover 63, a second end cover 64 and a piston 65, wherein the damping cylinder 61 passes through the valve core of the valve core assembly 2, the damping cylinder 61 is coaxially arranged with the valve core of the valve core assembly 2 and is fixedly connected to the valve core of the valve core assembly 2, the first end cover 63 is fixedly provided at the first end of the damping cylinder 61, the second end cover 64 is fixedly provided at the second end of the damping cylinder 61, the piston 65 is arranged in the damping cylinder 61 and slidably cooperates with the damping cylinder 61, the first end cover 63 is passed through by the movable shaft 5 of the bracket mechanism, and the movable shaft 5 is fixedly connected to the piston 65, the elastic component 62 is arranged between the first end cover 63 and the piston 65, and when the first end cover 63 moves relative to the piston 65, the elastic component 62 can limit the movement of the first end cover 63. The elastic component 62 may be a spring, which is sleeved on the movable shaft 5. The first end cap 63 is fixedly connected to the piston 65 via the spring. When the valve core is abnormally stressed due to a sudden change in fluid pressure or other special circumstances, the valve core drives the first end cap 63 to move relative to the piston 65. The spring can increase the resistance to the movement of the first end cap 63, thereby increasing the resistance to the movement of the valve core, slowing down the movement of the valve core, thereby absorbing kinetic energy and reducing impact force and vibration amplitude.

[0046] The present application also provides a high-precision Venturi effect flow control valve body, comprising: a Venturi cylinder 1, a valve core assembly 2, and a bracket mechanism, wherein the valve core assembly 2 is movably connected to the Venturi cylinder 1 through the above-mentioned high-precision Venturi effect flow control bracket mechanism.

[0047] Air volume adjustment is achieved by adjusting the valve core assembly 2, which is achieved through the axial movement of the movable shaft 5. To ensure accurate air volume adjustment, the axial movement of the movable shaft 5 must be stable, and radial movement of the movable shaft 5 must be avoided. When adjusting the valve core assembly 2, the fixed connector 41 moves axially synchronously with the valve core assembly 2 and the movable shaft 5. The movable shaft 5 slides relative to the sliding connector 42. The movable bracket unit can maintain the centering of the sliding connector 42, and the sliding connector 42 can limit the radial displacement of the movable shaft 5, thereby ensuring the centering of the valve core assembly 2.

[0048] Please refer to Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the high-precision Venturi effect flow control damper of the present application being arranged on the valve core. Figure 5This is a schematic diagram of a Venturi valve and valve core assembly in the prior art. The pressure-independent control characteristic of the Venturi valve is achieved by the combination of the conical surface profile of the valve core assembly 2 and the specific contour of the inner wall of the Venturi cylinder 1. When the fluid pressure changes, the valve core assembly 2 moves along the axial direction of the movable shaft 5 under the coordinated action of the wind pressure and the damper, dynamically adjusting the opening to maintain a constant flow rate. Figure 5 In order to achieve the coaxiality of the valve core, the traditional Venturi valve needs to adopt a front and rear double bracket structure that passes through the valve core, resulting in two sliding friction pairs between the valve core and the support shaft, which significantly increases the movement resistance; the present application uses a unilateral integrated bracket mechanism to enable the rear end of the damping cylinder 61 of the damper to be designed to be closed, and only a single-point sliding fit is achieved through the first end cover 63 and the movable shaft 5; thereby reducing the number of friction pairs from the traditional double point to a single point, and at the same time, the relatively closed space formed at the rear end of the damping cylinder 61 of the closed damper can produce an air cushion damping effect, further suppressing the vibration or deviation of the valve core assembly 2 during the dynamic adjustment process; the reduction in friction resistance and the enhancement of the damping effect jointly improve the response sensitivity and positioning accuracy of the valve core assembly 2 to pressure changes.

[0049] To summarize, this application solves the pain points of redundant length and insufficient centering of traditional Venturi effect valves through designs such as movable bracket units and sliding connectors. It combines the advantages of high precision, compactness and low cost, and is suitable for high-requirement scenarios such as building HVAC and chemical fluid control.

[0050] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0051] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application is intended to include these modifications and variations.

Claims

1. A high-precision Venturi effect flow control bracket mechanism is provided in the Venturi cylinder and is used for the movable connection between the valve core assembly and the Venturi cylinder. It is characterized by: include: A movable shaft is arranged along the axial direction of the Venturi cylinder and is coaxial with the valve core assembly; A fixed connecting piece is fixedly mounted on the valve core assembly and is fixedly connected to one end of the movable shaft close to the valve core assembly; a sliding connector, sleeved on the movable shaft and slidingly engaged with the movable shaft, and limiting radial displacement of the movable shaft; At least three movable support units are uniformly distributed around the movable axis in the circumferential direction, and each movable support unit includes: a cylinder fixing arm, one end of which is fixed to the inner wall of the Venturi cylinder; a valve core restraining arm, one end of which is hinged to the fixed connecting member; a dynamic balancing arm, one end of which is hinged to the sliding connection; The other end of the cylinder fixing arm, the other end of the valve core restraining arm and the other end of the dynamic balancing arm are hinged to each other; When the valve core assembly moves along the axial direction of the movable shaft, the radial displacement of the valve core assembly is synchronously constrained by the cooperation between the movable shaft, the sliding connector and the movable bracket unit, thereby maintaining the coaxiality of the valve core assembly and the venturi cylinder.

2. The high-precision Venturi effect flow control bracket mechanism according to claim 1, characterized in that: The articulation between the valve core restraint arm and the fixed connection, the articulation between the dynamic balancing arm and the sliding connection, and the articulation between the cylinder fixed arm, the valve core restraint arm and the dynamic balancing arm are all achieved through a pin; the axis of the pin is perpendicular to the axial direction of the movable shaft.

3. The high-precision Venturi effect flow control bracket mechanism according to claim 1, characterized in that: Three movable bracket units are provided, and the three movable bracket units are evenly distributed circumferentially with the movable axis as the center, and the angle between adjacent movable bracket units is 120°.

4. The high-precision Venturi effect flow control bracket mechanism according to claim 1, characterized in that: Four movable bracket units are provided, and the four movable bracket units are evenly distributed circumferentially with the movable axis as the center, and the angle between adjacent movable bracket units is 90°.

5. High-precision Venturi effect flow control damper, characterized in that, include: A damping cylinder, an elastic component, a first end cover, a second end cover, a piston, and a bracket mechanism as described in any one of claims 1 to 4, wherein the damping cylinder passes through the valve core of the valve core assembly, the damping cylinder is coaxially arranged with the valve core of the valve core assembly and is fixedly connected to the valve core of the valve core assembly, the first end of the damping cylinder is fixedly provided with a first end cover, the second end of the damping cylinder is fixedly provided with a second end cover, the piston is arranged in the damping cylinder and slides with the damping cylinder, the first end cover is passed through by the movable shaft of the bracket mechanism, the movable shaft is fixedly connected to the piston, the elastic component is arranged between the first end cover and the piston, and when the first end cover moves relative to the piston, the elastic component can limit the movement of the first end cover.

6. The high-precision Venturi-effect flow control damper according to claim 5, characterized in that: The elastic component is a spring, the spring is sleeved on the movable shaft, and the first end cover is fixedly connected to the piston through the spring.

7. High-precision Venturi effect flow control valve body, characterized in that, include: A venturi cylinder, a valve core assembly, and a bracket mechanism according to any one of claims 1 to 4, wherein the valve core assembly is movably connected to the venturi cylinder through the bracket mechanism.

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