CN-224216036-U - LVDT displacement sensor for regulation type valve actuator

CN224216036UCN 224216036 UCN224216036 UCN 224216036UCN-224216036-U

Abstract

The utility model provides an LVDT displacement sensor for an adjusting valve actuator, which relates to the field of sensors and comprises a coil framework, wherein the coil framework is arranged in a hollow mode, a connecting rod is arranged in the middle of the coil framework, two ends of the connecting rod extend out of the coil framework, a first coil and a second coil are arranged on the side part of the coil framework, a spring tray is arranged at the upper end of the connecting rod, a spring is arranged in the spring tray, and the bottom of the connecting rod is connected with the adjusting valve actuator.

Inventors

LI HONGFEI
ZOU MINGHUI
HUANG HUI
GUO ZHIJIAN

Assignees

广州美迪睿测控科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250513

Claims (8)

1. The LVDT displacement sensor for the adjustable valve actuator is characterized by comprising a coil framework, wherein the coil framework is arranged in a hollow mode, a connecting rod is arranged in the middle of the coil framework, two ends of the connecting rod extend out of the coil framework, a first coil and a second coil are arranged on the side portion of the coil framework, a spring tray is arranged at the upper end of the connecting rod, a spring is arranged in the spring tray, and the bottom of the connecting rod is connected with the adjustable valve actuator.
2. The LVDT displacement sensor for an adjustable valve actuator of claim 1, wherein one of said first coil and said second coil is an exciting coil and the other is an exciting coil, and wherein said first coil and said second coil are wound in the same direction and in the same number of windings.
3. The LVDT displacement sensor for an adjustable valve actuator of claim 1, wherein a first baffle is disposed in the middle of the bobbin, a second baffle is disposed at the upper end of the bobbin, a third baffle is disposed at the lower end of the bobbin, the first coil is mounted between the first baffle and the second baffle, and the second coil is mounted between the first baffle and the third baffle.
4. The LVDT displacement sensor for an adjustable valve actuator of claim 1, wherein a heat shrink tube is sleeved outside the first coil and outside the second coil.
5. The LVDT displacement sensor for an adjustable valve actuator of claim 3, wherein said coil former, said first baffle, said second baffle, and said third baffle are integrally formed.
6. The LVDT displacement sensor for an adjustable valve actuator of claim 1 wherein said spring tray is snap fit or threaded to said connecting rod.
7. The LVDT displacement sensor for an adjustable valve actuator of claim 1, wherein an iron core is disposed between the bobbin and the connecting rod, and the iron core is in interference fit with the connecting rod in a press fit manner.
8. The LVDT displacement sensor for an adjustable valve actuator of claim 1, wherein the connecting rod is connected with the adjustable valve actuator by threads, snap springs or end contact.

Description

LVDT displacement sensor for regulation type valve actuator Technical Field The application relates to the field of sensors, in particular to an LVDT displacement sensor for an adjustable valve actuator. Background In the prior art, most of resistance type displacement sensors have the problems of low linear difference precision and the like, so that the control precision of the valve is poor. The displacement sensor can greatly improve the accuracy of the displacement sensor for the actuator, thereby improving the control accuracy of the valve. The LVDT displacement sensor in the prior art is generally complex in structure, high in cost and large in installation space requirement, and cannot be miniaturized. That is, the poor accuracy of resistive displacement sensors existing LVDT sensors are difficult to integrate into valve actuators. Disclosure of Invention An objective of the embodiments of the present application is to provide an LVDT displacement sensor for an adjustable valve actuator, which can solve the above-mentioned technical problems. The embodiment of the application provides an LVDT displacement sensor for an adjustable valve actuator, which comprises a coil framework, wherein the coil framework is arranged in a hollow mode, a connecting rod is arranged in the middle of the coil framework, two ends of the connecting rod extend out of the coil framework, a first coil and a second coil are arranged on the side part of the coil framework, a spring tray is arranged at the upper end of the connecting rod, a spring is arranged in the spring tray, and the bottom of the connecting rod is connected with the adjustable valve actuator. Preferably, one of the first coil and the second coil is an exciting coil, and the other is an exciting coil, and the first coil and the second coil are wound in the same direction and with the same number of windings. Preferably, a first baffle is arranged in the middle of the coil framework, a second baffle is arranged at the upper end of the coil framework, a third baffle is arranged at the lower end of the coil framework, the first coil is arranged between the first baffle and the second baffle, and the second coil is arranged between the first baffle and the third baffle. Preferably, a heat shrinkage tube is sleeved outside the first coil and outside the second coil. Preferably, the coil bobbin, the first baffle, the second baffle, and the third baffle are integrally formed. Preferably, the spring tray is connected with the connecting rod through clamping or threads. Preferably, an iron core is arranged between the coil framework and the connecting rod, and the iron core is in interference fit with the connecting rod in a press fit mode. Preferably, the connecting rod is connected with the adjusting valve actuator through threaded connection, snap spring connection or end surface contact connection. The utility model has the beneficial effects that: The utility model provides an LVDT displacement sensor for an adjustable valve actuator, which comprises a coil framework, wherein the coil framework is arranged in a hollow mode, a connecting rod is arranged in the middle of the coil framework, two ends of the connecting rod extend out of the coil framework, a first coil and a second coil are arranged on the side portion of the coil framework, a spring tray is arranged at the upper end of the connecting rod, a spring is arranged in the spring tray, and the bottom of the connecting rod is connected with the adjustable valve actuator. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is a schematic diagram of a coil bobbin structure according to the present utility model; fig. 3 is a schematic view of another view angle structure of the coil bobbin of the present utility model. The reference numerals are respectively: 1. A coil bobbin; 2, a connecting rod, 3, a first coil, 4, a second coil, 5, a spring tray, 6, a spring, 7, a first baffle, 8, a second baffle, 9, a third baffle and 10, and an iron core. Detailed Description For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present applica