Electromagnetic regulating valve carrying LVDT (Linear Variable Differential Transformer) displacement sensor

Abstract

The utility model provides an electromagnetic regulating valve carrying an LVDT displacement sensor, and relates to the field of regulating valves. An electromagnetic regulating valve carrying an LVDT displacement sensor comprises an LVDT sensor assembly, an upper cover, a circuit board, a lower base, an armature, a copper sleeve, a support, a magnet exciting coil, an armature core, a spring, an armature base, a valve rod and a valve body assembly. When the valve rod moves up and down, friction force basically does not exist, the up-and-down movement of the regulating valve can be achieved without overcoming redundant friction force, and a dead zone basically does not exist. And in combination with a high-precision LVDT sensor, high-precision adjustment can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of regulating valves, in particular to an electromagnetic regulating valve with an LVDT displacement sensor. BACKGROUND

[0002] There are two main types of existing regulating valves, electric regulating type and pneumatic regulating type. The electric regulating type is driven by a motor to adjust the gear, which has the problems of slow adjustment speed, low adjustment accuracy and large dead zone. The pneumatic regulating valve has a faster adjustment speed, but it is also large in size and has the problems of low adjustment accuracy and large dead zone. It cannot meet the increasing requirements for valve control accuracy and adjustment speed. SUMMARY

[0003] The purpose of the present application is to provide an electromagnetic regulating valve with an LVDT displacement sensor, which can solve the above technical problems.

[0004] The present application provides an electromagnetic regulating valve with an LVDT displacement sensor, which comprises an LVDT sensor assembly, an upper cover, a circuit board, a lower seat, an armature, a copper sleeve, a bracket, an excitation coil, an armature core, a spring, an armature seat, a valve stem and a valve body assembly. The LVDT sensor assembly extends through the upper end of the upper cover to the inside thereof. The lower end of the LVDT sensor assembly abuts against the upper end of the armature through the circuit board. The LVDT sensor assembly is electrically connected to the circuit board. The upper cover is connected to the lower seat. The bracket is connected to the lower seat. The armature passes through the bracket. The copper sleeve is sleeved on the outer end of the armature. The excitation coil is sleeved on the outer end of the armature. The lower end of the armature is provided with a fixing groove. The upper end of the armature core is arranged in the fixing groove. The armature seat is mounted on the bracket. The lower end of the armature core extends into the armature seat. The spring is arranged on the outer end of the armature core. The spring is pre-pressed between the armature and the armature seat. The upper end of the valve stem is connected to the lower end of the armature. The lower end of the valve stem is connected to the valve body assembly.

[0005] Preferably, the valve body assembly comprises an upper valve seat, a valve plate and a lower valve seat. The upper valve seat is mounted above the lower valve seat. The valve plate is mounted between the upper valve seat and the lower valve seat. The lower end of the valve stem abuts against the valve plate.

[0006] Preferably, the bracket is arranged in the shape of a Chinese character “ ”. The upper end of the bracket is provided with an upper inner hole. The lower end of the bracket is provided with a lower inner hole. The armature passes through the upper inner hole and the lower inner hole in sequence from top to bottom.

[0007] Preferably, the outer end of the excitation coil is provided with a coil skeleton.

[0008] As preferred, the fixed groove lower end is provided with a spring limiting groove, the spring upper end is installed in the spring limiting groove, and the diameter of the spring limiting groove is larger than that of the fixed groove.

[0009] As preferred, an oil seal is arranged between the armature seat and the valve body assembly, the armature and the copper sleeve are gap-fitted, and damping oil is applied between the armature and the copper sleeve.

[0010] As preferred, the armature and the armature seat are gap-fitted.

[0011] The utility model discloses beneficial effect:

[0012] The utility model provides a kind of electromagnetic regulating valve of carrying LVDT displacement sensor, including LVDT sensor assembly, upper cover, circuit board, lower seat, armature, copper sleeve, support, excitation coil, armature core, spring, armature seat, valve stem, valve body assembly, the LVDT sensor assembly extends to its inside through the upper end of the upper cover, the lower end of the LVDT sensor assembly passes through the circuit board and the armature upper end abuts, the LVDT sensor assembly is electrically connected with the circuit board, the upper cover is connected with the lower seat, the support is connected with the lower seat, the armature passes through the support, the copper sleeve is sleeved on the armature outer end, the excitation coil is set on the armature outer end, the armature lower end is provided with fixed groove, the armature core upper end is set in the fixed groove, the armature seat is installed on the support, the lower end of the armature core extends into the armature seat, the spring is arranged on the armature core outer end, the spring is pre-pressed between the armature and the armature seat, the valve stem upper end is connected with the armature lower end, and the valve stem lower end is connected with the valve body assembly;The utility model in the up-and-down movement of valve stem, there is substantially no friction, and the up-and-down action of regulating valve can be realized without overcoming excessive friction, and there is substantially no dead zone;In combination with high-precision LVDT sensor, high-precision adjustment can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is a support structural schematic view of the utility model;

[0016] Figure 3 The schematic diagram of the armature structure of the utility model;

[0017] Figure 4 The schematic diagram of the armature seat structure of the utility model.

[0018] The reference signs are respectively:

[0019] 1, LVDT sensor assembly;2, upper cover;3, circuit board;4, lower seat;5, armature;6, copper sleeve;7, bracket;8, excitation coil;9, armature core;10, spring;11, armature seat;12, valve stem;13, valve body assembly;14, fixed groove;15, upper valve seat;16, valve plate;17, lower valve seat;18, upper inner hole;19, lower inner hole;20, coil skeleton;21, spring limiting groove;22, oil seal. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0022] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Furthermore, the terms "horizontal", "vertical", "suspended", and the like, do not mean that the components must be absolutely horizontal or suspended, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0025] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] As shown in Figures 1-4 An electromagnetic regulating valve with LVDT displacement sensor, including LVDT sensor assembly 1, upper cover 2, circuit board 3, lower seat 4, armature 5, copper sleeve 6, bracket 7, excitation coil 8, armature core 9, spring 10, armature seat 11, valve stem 12, valve body assembly 13, the LVDT sensor assembly 1 extends through the upper end of the upper cover 2 to its inside, the lower end of the LVDT sensor assembly 1 abuts with the upper end of the armature 5 through the circuit board 3, the LVDT sensor assembly 1 is electrically connected with the circuit board 3, the upper cover 2 is connected with the lower seat 4, the bracket 7 is connected with the lower seat 4, the armature 5 passes through the bracket 7, the copper sleeve 6 is sleeved on the outer end of the armature 5, the excitation coil 8 is sleeved on the outer end of the armature 5, the lower end of the armature 5 is provided with a fixed groove 14, the upper end of the armature core 9 is arranged in the fixed groove 14, the armature seat 11 is installed on the bracket 7, the lower end of the armature core 9 extends into the armature seat 11, the spring 10 is arranged on the outer end of the armature core 9, the spring 10 is pre-pressed between the armature 5 and the armature seat 11, the upper end of the valve stem 12 is connected with the lower end of the armature 5, and the lower end of the valve stem 12 is connected with the valve body assembly 13; The upper and lower movements of the valve stem 12 basically do not exist friction, and the upper and lower movements of the regulating valve can be realized without overcoming excessive friction, and there is basically no dead zone; combined with high-precision LVDT sensor, high-precision adjustment can be realized.

[0027] As shown in Figure 1As shown, in this embodiment, the valve body assembly 13 includes an upper valve seat 15, a valve disc 16, and a lower valve seat 17. The upper valve seat 15 is installed above the lower valve seat 17, the valve disc 16 is installed between the upper valve seat 15 and the lower valve seat 17, and the lower end of the valve stem 12 abuts against the valve disc 16. The valve disc 16 of the present utility model is a flexible valve disc 16, which can be closely fitted with the upper valve seat 15 or the lower valve seat 17, improving the accuracy of the solenoid valve.

[0028] As Figure 2 shown, in this embodiment, the bracket 7 is arranged in a "U" shape. An upper inner hole 18 is provided at the upper end of the bracket 7, and a lower inner hole 19 is provided at the lower end of the bracket 7. The armature 5 passes through the upper inner hole 18 and the lower inner hole 19 from top to bottom in sequence. The bracket 7 of the present utility model can limit the position of the armature 5, preventing the armature 5 from shifting left and right.

[0029] As Figure 1 shown, in this embodiment, a coil bobbin 20 is provided at the outer end of the excitation coil 8. The coil bobbin 20 of the present utility model is used to fix and limit the excitation coil 8.

[0030] As Figure 2 shown, in this embodiment, to make the spring 10 more stable, a spring limiting groove 21 is provided at the lower end of the fixing groove 14. The upper end of the spring 10 is installed in the spring limiting groove 21, and the diameter of the spring limiting groove 21 is larger than the diameter of the fixing groove 14.

[0031] As Figure 1 shown, in this embodiment, an oil seal 22 is provided between the armature seat 11 and the valve body assembly 13. The armature 5 and the copper sleeve 6 are in clearance fit, and damping oil is applied between the armature 5 and the copper sleeve 6. The damping oil can make there be a certain damping between the armature 5 and the copper sleeve 6 and can also provide appropriate lubrication.

[0032] As Figure 1 shown, in this embodiment, to reduce the friction between the armature 5 and the armature seat 11, the armature 5 and the armature seat 11 are in clearance fit.

[0033] As Figures 1-4 shown, the working principle of the present utility model is as follows:

[0034] When the excitation coil 8 is energized, a magnetic field will be generated, and on the premise that the wire diameter and the number of turns of the coil are certain, the magnetic field intensity is positively correlated with the energizing voltage of the excitation coil 8.

[0035] As the energizing voltage of the excitation coil 8 increases, the armature 5 continuously moves downward under the action of the above magnetic field, compresses the spring 10, and moves the valve stem 12 and the valve disc 16 downward; until the valve disc 16 is completely and closely fitted on the lower valve seat 17.

[0036] At this time, the LVDT displacement sensor probe is also closely attached to the armature 5 under the action of the spring 10, and a changing induced electromotive force is generated due to the change in the position of the probe; when the energizing voltage of the exciting coil 8 gradually decreases, the force exerted on the armature 5 by the above magnetic field gradually weakens, and the valve stem 12 and the valve disc 16 move upward under the action of the spring 10; until the valve disc 16 is completely and closely attached to the lower valve seat 17. At this time, the LVDT displacement sensor probe is also closely attached to the armature 5 and moves upward and compresses the spring 10 of the LVDT displacement sensor, and a changing induced electromotive force is generated due to the change in the position of the probe.

[0037] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetic control valve incorporating a LVDT displacement sensor, characterised in that: The application relates to a valve assembly, which comprises an LVDT sensor assembly, an upper cover, a circuit board, a lower base, an armature, a copper sleeve, a support, an excitation coil, an armature core, a spring, an armature base, a valve rod and a valve body assembly.

2. An electromagnetic control valve incorporating a LVDT displacement sensor according to claim 1, characterized in that: The valve body assembly comprises an upper valve seat, a valve plate and a lower valve seat, the upper valve seat is arranged above the lower valve seat, the valve plate is arranged between the upper valve seat and the lower valve seat, and the lower end of the valve rod is in abutment with the valve plate.

3. The electromagnetic control valve incorporating LVDT displacement sensor as claimed in claim 1 wherein: The support is arranged in a "Fang" shape, the upper end of the support is provided with an upper inner hole, the lower end of the support is provided with a lower inner hole, and the armature sequentially passes through the upper inner hole and the lower inner hole from top to bottom.

4. The electromagnetic control valve carrying LVDT displacement sensor as claimed in claim 1 wherein: The outer end of the excitation coil is provided with a coil framework.

5. The electromagnetic control valve carrying LVDT displacement sensor as claimed in claim 1 wherein: The lower end of the fixed groove is provided with a spring limiting groove, the upper end of the spring is arranged in the spring limiting groove, and the diameter of the spring limiting groove is larger than that of the fixed groove.

6. The electromagnetic control valve incorporating LVDT displacement sensor as claimed in claim 1 wherein: An oil seal is arranged between the armature base and the valve body assembly, the armature and the copper sleeve are in clearance fit, and damping oil is applied between the armature and the copper sleeve.

7. The electromagnetic control valve carrying LVDT displacement sensor as claimed in claim 1 wherein: The armature and the armature base are in clearance fit.

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