Venturi valve provided with magnetic encoder

Abstract

A Venturi valve provided with a magnetic encoder comprises a valve body and an air volume adjusting mechanism, the air volume adjusting mechanism is arranged at the top of the valve body and composed of a driver, a sliding block, a sliding seat, a connecting rod and the magnetic encoder, the magnetic encoder is composed of a magnetic scale, a reading head and an installation groove, and the magnetic scale is connected with the connecting rod. One end of the connecting rod is connected with a valve rod in the valve body, and the other end moves on the sliding seat through the sliding block. The non-physical contact type magnetic encoder is adopted in the air volume adjusting mechanism of the Venturi valve, faults caused by abrasion and pollution of a traditional mechanical contact type encoder are avoided, the service life of equipment is prolonged through a friction-free structure, the overall reliability of a system is improved, meanwhile, the environment adaptability is improved, and the service life of the equipment is prolonged. And the magnetic encoder is high in explosion-proof grade, can be used in an environment with a high explosion-proof grade requirement, and has the advantages of simple structure, convenience in maintenance, high adjustment precision and long service life.

Description

Technical Field

[0001] This utility model relates to a valve, specifically a Venturi valve equipped with a magnetic encoder. Background Technology

[0002] The Venturi airflow control valve combines a mechanical pressure-independent regulator with a high-speed airflow controller, extending airflow control to the highest level. Through aerodynamic design, the valve features quiet operation and a fast-responding automatic pressure balancing device, providing reliable supply air pressure control. However, Venturi valves used for both unit outlet air conditioning and room vent air conditioning require airflow regulation. To achieve this, most Venturi valves currently use traditional mechanical contact encoders to detect valve opening. Because these encoders are in contact with the valve stem, they are prone to wear during use and are easily contaminated by environmental dust, dirt, or oil, resulting in a short lifespan and poor environmental adaptability. Furthermore, the low detection accuracy of mechanical contact encoders leads to poor airflow regulation precision, making fine airflow adjustment impossible. Additionally, mechanical contact encoders have low explosion-proof ratings, making them unsuitable for environments with high explosion-proof requirements, such as mines. Utility Model Content

[0003] This invention provides a Venturi valve with a magnetic encoder installed to solve the problems of low airflow regulation accuracy, short service life and low explosion-proof rating of existing Venturi valves.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A venturi valve with a magnetic encoder includes a valve body and an airflow regulating mechanism. The airflow regulating mechanism is located on the top of the valve body and consists of a driver, a slider, a slide block, a connecting rod, and a magnetic encoder. The magnetic encoder consists of a magnetic scale, a reading head, and a mounting groove. The magnetic scale is connected to the connecting rod, one end of which is connected to the valve stem inside the valve body, and the other end of which moves on the slide block via the slider.

[0006] The reading head of the aforementioned magnetic encoder is equipped with a Hall effect sensor or a magnetoresistive sensor.

[0007] The mounting slot of the aforementioned magnetic encoder is made of aluminum profile, and the aluminum material will not affect the transmission of magnetic field transformation.

[0008] When adjusting the airflow using the Venturi valve of this invention, the operator drives the slider to move along the slide block via the driver. The slider pulls the valve stem via the connecting rod. During the movement of the valve stem by the connecting rod, when the magnetic scale connected to the connecting rod rotates or moves, the Hall effect sensor or magnetoresistive sensor in the reading head detects the change in the magnetic field and converts it into an electrical signal. After amplification, filtering, decoding, and other processing, these electrical signals are output to the external control system, thereby achieving precise detection of the valve stem position change. The control system adjusts the airflow based on the detection data of the magnetic encoder.

[0009] This invention employs a non-physical contact magnetic encoder in the airflow regulating mechanism of a venturi valve, avoiding the failures caused by wear and contamination of traditional mechanical contact encoders. The frictionless structure extends the service life of the equipment, improves the overall reliability of the system, and enhances environmental adaptability. Moreover, the magnetic encoder has a high explosion-proof rating and can be used in environments with high explosion-proof requirements. It has the advantages of simple structure, convenient maintenance, high adjustment accuracy, and long service life. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a front view schematic diagram of the present invention;

[0013] Figure 3 This is a top view of the present invention;

[0014] Figure 4 This is an installation diagram of the magnetic encoder of this utility model.

[0015] In the diagram, 1 is the valve body, 2 is the actuator, 3 is the slider, 4 is the slide block, 5 is the connecting rod, 6 is the magnetic encoder, 7 is the valve stem, 61 is the magnetic scale, 62 is the reading head, and 63 is the mounting slot. Detailed Implementation

[0016] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a Venturi valve with a magnetic encoder includes a valve body 1 and an airflow regulating mechanism. The airflow regulating mechanism is located on the top of the valve body 1 and consists of a driver 2, a slider 3, a slide block 4, a connecting rod 5, and a magnetic encoder 6. The magnetic encoder 6 consists of a magnetic scale 61, a reader 62, and a mounting slot 63. The magnetic scale 61 is connected to the connecting rod 5, one end of which is connected to the valve stem 7 inside the valve body 1, and the other end of which moves on the slide block 4 via the slider 3. The reader 62 of the magnetic encoder is equipped with a Hall effect sensor or a magnetoresistive sensor. The mounting slot 63 of the magnetic encoder is made of aluminum profile, and the aluminum material does not affect the transmission of magnetic field transformation.

[0017] When adjusting the airflow using the Venturi valve of this invention, the operator drives the slider to move along the slide block via the driver. The slider pulls the valve stem via the connecting rod. During the movement of the valve stem by the connecting rod, when the magnetic scale connected to the connecting rod rotates or moves, the Hall effect sensor or magnetoresistive sensor in the reading head detects the change in the magnetic field and converts it into an electrical signal. After amplification, filtering, decoding, and other processing, these electrical signals are output to the external control system, thereby achieving precise detection of the valve stem position change. The control system adjusts the airflow based on the detection data of the magnetic encoder.

Claims

1. A Venturi valve with a magnetic encoder, comprising a valve body and an airflow regulating mechanism, wherein the airflow regulating mechanism is located on the top of the valve body, characterized in that... The air volume regulating mechanism consists of a driver, a slider, a slide block, a connecting rod, and a magnetic encoder. The magnetic encoder consists of a magnetic scale, a reading head, and a mounting slot. The magnetic scale is connected to the connecting rod, one end of which is connected to the valve stem inside the valve body, and the other end of which moves on the slide block via the slider.

2. The Venturi valve with a magnetic encoder installed according to claim 1, characterized in that: The read head of a magnetic encoder is equipped with a Hall effect sensor or a magnetoresistive sensor.

3. The Venturi valve with a magnetic encoder installed according to claim 1, characterized in that... The mounting slot for the magnetic encoder is made of aluminum profile.

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