Linear type air volume adjusting valve with air volume measuring function

Abstract

The utility model provides a linear type air volume regulating valve with an air volume measuring function, which is characterized in that a low-pressure pressure taking ring and a high-pressure pressure taking ring are respectively arranged inside and outside a valve body of the air volume regulating valve, the low-pressure pressure taking ring is provided with a low-pressure hole, and a high-pressure hole is arranged at the matching position of the valve body and the low-pressure pressure taking ring; two ends of the differential pressure sensor are respectively communicated with the interiors of the low-pressure pressure taking ring and the high-pressure pressure taking ring; according to the utility model, breakthrough improvement is realized through the integrated air volume measurement structure. A low-pressure pressure taking ring and a high-pressure pressure taking ring are arranged inside and outside the valve body respectively, and the valve flow and the valve opening full stroke are linear working characteristics by combining the Venturi structure of the valve body and the 3D design of the streamline valve element. According to the design, the dependence of a traditional thermal flowmeter on front and rear straight pipe sections is thoroughly eliminated, the measurement precision can be ensured even if the field space is limited, and the positioning deviation of split installation is avoided due to the fact that the pressure measuring point position is solidified through the valve body structure and the flow field is optimized and rectified.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a linear air volume regulating valve with air volume measurement function. Background Technology

[0002] Valves are widely used in fluid control, and are categorized into four types based on their flow characteristics: linear, equal percentage, parabolic, and quick-opening. Linear valves are the best choice for applications requiring flow control. Currently, ball valves, butterfly valves, gate valves, and globe valves on the market are not linear valves. In common scenarios, only venturi valves used in ventilation and air conditioning are linear valves, but these are only suitable for low-pressure ventilation. In high-pressure ventilation and aeration systems at wastewater treatment plants, only ordinary valves can be used for automatic flow control, but the results are not ideal.

[0003] Specifically, in a precision airflow control system, it is necessary to measure the airflow in the pipeline in real time and provide feedback to the control system for adjustment. Currently, thermal gas mass flow meters are commonly used. These flow meters are installed on the pipeline to measure the flow rate. However, thermal gas mass flow meters have certain requirements for the upstream and downstream straight pipe sections at the installation point (10 times the pipe diameter upstream and 5 times the pipe diameter downstream), otherwise the measurement accuracy will be affected. In actual engineering sites, it is difficult to meet this requirement due to objective limitations. In addition, while separate installation of valves and flow meters can meet the basic functional requirements, their use is limited by the installation conditions of the flow meter in specific operating environments. Summary of the Invention

[0004] In view of the above technical problems, this utility model provides a linear air volume regulating valve with air volume measurement function to solve the above technical problems.

[0005] A linear airflow regulating valve with airflow measurement function includes a valve body, an electric actuator, a transmission assembly, and a valve core. The output end of the electric actuator extends into the valve body and is connected to one end of the transmission assembly. The other end of the transmission assembly is equipped with the valve core. The valve body has a low-pressure tapping ring and a high-pressure tapping ring, respectively. The low-pressure tapping ring has a low-pressure port. The valve body has a high-pressure port at the mating point with the low-pressure tapping ring. A differential pressure sensor is installed on the valve body. The two ends of the differential pressure sensor are connected to the interior of the low-pressure tapping ring and the high-pressure tapping ring, respectively.

[0006] Furthermore, both the low-pressure tapping ring and the high-pressure tapping ring are semi-tube-shaped annular structures, with the diameter of the low-pressure tapping ring being larger than that of the high-pressure tapping ring.

[0007] Furthermore, the valve body is provided with a support plate, which is used to support the transmission assembly and / or the valve core.

[0008] Furthermore, the valve body has a venturi tubular structure, the valve body's variable diameter structure matches the valve core, and the valve core has a streamlined cross-section.

[0009] Furthermore, the transmission assembly includes a reversing transmission assembly, a power input end, a sleeve, a first valve stem, and a second valve stem. The power input end is connected to an electric actuator. One end of the reversing transmission assembly is connected to the transmission assembly, and the other end is connected to the first valve stem. The second valve stem is connected to the first valve stem. The sleeve is fitted over the first valve stem, and the second valve stem and the first valve stem form a two-section telescopic structure.

[0010] Furthermore, the valve core has a hollow structure, and a sleeve is provided inside the valve core. The sleeve is slidably fitted on the second valve stem, and the sleeve and the second valve stem are connected by a compensating spring.

[0011] The beneficial effects of this utility model are as follows: Addressing the industry pain points of existing split-type flow meters, such as stringent requirements for straight pipe sections and the lack of reliable linear valves in high-pressure scenarios, this utility model achieves a breakthrough through innovative integrated design. Its core lies in the deep integration of differential pressure generation, acquisition, and compensation mechanisms: the Venturi structure of the valve body and the streamlined valve core work together to form a stable differential pressure field. The low-pressure and high-pressure tapping rings, separately located inside and outside the valve body, accurately acquire differential pressure signals through fixed tapping points (low-pressure orifice / high-pressure orifice), completely avoiding the dependence of traditional thermal flow meters on upstream / downstream 10D / 5D straight pipe sections. Even in environments with limited installation space, it can guarantee a measurement accuracy of ±5%.

[0012] For high-pressure scenarios such as sewage treatment aeration, the internal support plate of the valve strengthens the pressure resistance of the transmission components. Combined with the dynamic stabilization design of the compensation spring inside the valve core, it can automatically offset the thrust of pipeline pressure fluctuations on the valve core, achieving deep integration of linear flow regulation and air volume measurement for the first time in a high-pressure environment.

[0013] This design simultaneously creates significant economic benefits. The integrated structure eliminates the need to purchase separate flow meters, and the pre-installed calibration of high and low pressure tapping rings and differential pressure sensors simplifies the installation process and eliminates the need for on-site calibration. The integration of components concentrates the failure points and reduces maintenance costs.

[0014] The two-stage telescopic structure of the transmission component adopts a twin-screw differential drive, which improves the valve core stroke control accuracy by 3 times, while the enlarged pipe diameter design of the low-pressure tapping ring optimizes the signal-to-noise ratio of the differential pressure signal.

[0015] These innovations have enabled the valve to extend from HVAC systems to medium- and high-pressure applications such as industrial gas delivery and laboratory pressure control, systematically solving three major industry pain points: space limitations, high-pressure instability, and complex maintenance of split-type solutions. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 2 For the present utility model in Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic diagram of the transmission assembly in this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the valve core in this utility model.

[0020] As shown in the figure: 1. Valve body; 11. High pressure port; 2. Electric actuator; 3. Transmission assembly; 31. Reversing transmission assembly; 32. Power input end; 33. Sleeve; 34. First valve stem; 35. Second valve stem; 4. Support plate; 5. Valve core; 51. Sleeve plate; 6. Low pressure tapping ring; 61. Low pressure port; 7. High pressure tapping ring; 8. Differential pressure sensor; 9. Compensation spring. Detailed Implementation

[0021] Example 1: To address the limitations caused by separate installation of the valve and flow meter, this example proposes an airflow regulating valve with airflow measurement function.

[0022] like Figure 1 and Figure 2 As shown, a linear airflow regulating valve with airflow measurement function includes a valve body 1, an electric actuator 2, a transmission assembly 3, and a valve core 5. The output end of the electric actuator 2 extends into the valve body 1 and is connected to one end of the transmission assembly 3. The other end of the transmission assembly 3 is equipped with the valve core 5. The valve body 1 is provided with a low-pressure tapping ring 6 and a high-pressure tapping ring 7 inside and outside, respectively. The low-pressure tapping ring 6 has a low-pressure hole 61. The valve body 1 is provided with a high-pressure hole 11 at the matching point with the low-pressure tapping ring 6. A differential pressure sensor 8 is installed on the valve body 1. The two ends of the differential pressure sensor 8 are respectively connected to the interior of the low-pressure tapping ring 6 and the high-pressure tapping ring 7.

[0023] Addressing the industry pain points highlighted in the background section, traditional split-type flow meters face stringent requirements for straight pipe sections during installation and lack reliable linear valves for high-pressure scenarios. This invention achieves a breakthrough improvement through an integrated airflow measurement structure. Its core design involves separate low-pressure tapping rings 6 and 7 inside and outside the valve body 1, which, combined with the venturi structure of the valve body and the streamlined valve core 5, form a precise pressure differential field. This design completely eliminates the dependence of traditional thermal flow meters on upstream and downstream straight pipe sections, ensuring measurement accuracy even in confined spaces. Because the pressure tapping point positions are fixed within the valve body 1 structure and the flow field is optimized and rectified, positioning deviations inherent in split-type installations are avoided.

[0024] Furthermore, both the low-pressure tapping ring 6 and the high-pressure tapping ring 7 are semi-tubular annular structures, with the diameter of the low-pressure tapping ring 6 being larger than that of the high-pressure tapping ring 7. This integrated design significantly reduces system complexity. The high and low pressure tapping rings and the differential pressure sensor 8 are pre-calibrated on the valve body 1. The special structure of the semi-tubular tapping rings (low-pressure ring diameter > high-pressure ring diameter) expands the low-pressure sampling area and improves signal stability. Compared to a separate design, the installation process is reduced by 50% and the on-site calibration process is eliminated. The concentration of fault points reduces maintenance costs by 40%, and the cost of purchasing a separate flow meter is also saved.

[0025] The valve body 1 is provided with a support plate 4, which is used to support the transmission assembly 3 and / or the valve core 5. The internal support plate 4 of the valve body 1 reinforces the transmission assembly 3 to withstand high pressure impact.

[0026] The valve body 1 has a venturi tubular structure, the variable diameter structure of the valve body 1 matches the valve core 5, and the valve core 5 has a streamlined cross-section.

[0027] The transmission assembly 3 includes a reversing transmission assembly 31, a power input end 32, a sleeve 33, a first valve stem 34, and a second valve stem 35. The power input end 32 is connected to the electric actuator 2. One end of the reversing transmission assembly 31 is connected to the transmission assembly 31, and the other end is connected to the first valve stem 34. The second valve stem 35 is connected to the first valve stem 34. The sleeve 33 is fitted over the first valve stem 34, forming a two-stage telescopic structure with the first valve stem 34. Specifically, the two-stage telescopic structure uses a double-screw nut structure with different screw pitches, driving simultaneously so that the first valve stem 34 and the second valve stem 35 extend and retract simultaneously, with the second valve stem 35 extending and retracting at twice the speed of the first valve stem 34. This is unlike the traditional telescopic mechanism where the first section extends completely before the second section, and the first section retracts first before the second section retracts.

[0028] Its compatibility allows it to be adapted to various electric actuators. Through the two-stage telescopic structure of the transmission component, it can precisely control the valve core stroke. It has now been extended to medium and high pressure scenarios such as HVAC and industrial gas transmission, forming significant economic and reliability advantages.

[0029] Example 2 is an optimized design based on Example 1. It is mainly used to solve the problem of stabilizing the pressure at the valve core 5 position when the pipeline system pressure changes within a certain range under high explosion gas scenarios, thereby achieving stable flow.

[0030] Specifically, such as Figures 1-4As shown, the valve core 5 has a hollow structure, and a sleeve 51 is provided inside the valve core 5. The sleeve 51 is slidably fitted onto the second valve stem 35, and the sleeve 51 and the second valve stem 35 are connected by a compensating spring 9. When the valve opening is small or just opened, due to the compensating spring 9 inside the valve core 5, the air pressure will compress the spring, and the second valve stem 35 will not be able to move the valve core 5, preventing it from opening. This is especially true when the valve is closed, as the air pressure is high. Once the valve is opened, the pressure difference across the valve core 5 will immediately and rapidly decrease, thus allowing the compensating spring 9 inside the valve core 5 to function.

[0031] Addressing the industry gap in high-pressure ventilation scenarios, this utility model achieves a breakthrough through enhanced structure and dynamic compensation mechanism. The differential pressure sensor 8 directly collects the real-time pressure difference between the high / low pressure tapping rings, and dynamically calculates the airflow based on the valve opening. Meanwhile, the compensation spring 9 inside the valve core 5 automatically offsets the thrust of pipeline pressure fluctuations on the valve core 5, ensuring stable opening even under high-pressure conditions such as wastewater treatment aeration. This enables the valve to achieve, for the first time in a high-pressure environment, deep integration of linear flow regulation and airflow measurement, with the measured flow linearity error controlled within ±5%.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A linear airflow regulating valve with airflow measurement function, comprising a valve body (1), an electric actuator (2), a transmission assembly (3), and a valve core (5), wherein the output end of the electric actuator (2) extends into the valve body (1) and is connected to one end of the transmission assembly (3), and the other end of the transmission assembly (3) is fitted with the valve core (5). Its features are, The valve body (1) is provided with a low-pressure tapping ring (6) and a high-pressure tapping ring (7) inside and outside respectively. The low-pressure tapping ring (6) has a low-pressure hole (61). The valve body (1) and the low-pressure tapping ring (6) have a high-pressure hole (11) at the matching position. The valve body (1) is equipped with a differential pressure sensor (8). The two ends of the differential pressure sensor (8) are respectively connected to the inside of the low-pressure tapping ring (6) and the high-pressure tapping ring (7).

2. A linear airflow regulating valve with airflow measurement function according to claim 1, characterized in that, Both the low-pressure tapping ring (6) and the high-pressure tapping ring (7) are semi-pipe-shaped annular structures, and the diameter of the low-pressure tapping ring (6) is larger than that of the high-pressure tapping ring (7).

3. A linear airflow regulating valve with airflow measurement function according to claim 1, characterized in that, The valve body (1) is provided with a support plate (4), which is used to support the transmission assembly (3) and / or the valve core (5).

4. A linear airflow regulating valve with airflow measurement function according to claim 1, characterized in that, The valve body (1) has a Venturi tube structure, the valve body (1) has a variable diameter structure that matches the valve core (5), and the valve core (5) has a streamlined cross-section.

5. A linear airflow regulating valve with airflow measurement function according to claim 1, characterized in that, The transmission assembly (3) includes a reversing transmission assembly (31), a power input end (32), a sleeve (33), a first valve stem (34), and a second valve stem (35). The power input end (32) is connected to the electric actuator (2). One end of the reversing transmission assembly (31) is connected to the transmission assembly (3), and the other end is connected to the first valve stem (34). The second valve stem (35) is connected to the first valve stem (34). The sleeve (33) is sleeved outside the first valve stem (34). The second valve stem (35) and the first valve stem (34) form a two-section telescopic structure.

6. A linear airflow regulating valve with airflow measurement function according to claim 1, characterized in that, The valve core (5) has a hollow structure and a sleeve (51) is provided inside the valve core (5). The sleeve (51) is slidably fitted on the second valve stem (35). The sleeve (51) and the second valve stem (35) are connected by a compensating spring (9).

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