CN114321485A

CN114321485A - Proportion-adjustable electromagnet

Info

Publication number: CN114321485A
Application number: CN202111646971.XA
Authority: CN
Inventors: 卢海锋; 贾爱华; 路献飞
Original assignee: Anyang Kaidi Magnetic Technology Co ltd
Current assignee: Anyang Kaidi Magnetic Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-12

Abstract

The utility model provides an adjustable proportion electro-magnet, includes the shell, installs plastic envelope coil, magnetic core pipe in the shell, magnetic core pipe include the guide pin bushing, install the moving iron in the guide pin bushing, push rod fixed connection has a plurality of oilholes of crossing on moving iron, the downthehole screw thread that has of guide pin bushing rear end, the tail cap passes through the screw thread and connects soon at the guide pin bushing rear end, installs the spring between the rear end of tail cap and moving iron, the one end pressure of spring is on moving iron, one end is pressed and is established on the tail cap, the rear end of crossing the oilhole has one section screw hole, the screwed connection has the screwed pipe in the screw hole, has the mesopore on the screwed pipe, the rear end of screwed pipe has the joint portion with spanner or screwdriver matched with, the screwed pipe have a plurality of substitute screwed pipes, the accessible is lifted off the change screwed pipe with the tail cap from the guide pin bushing. The electromagnet can solve the problem that the pressure control of the hydraulic system is unstable due to valve control.

Description

Proportion-adjustable electromagnet

Technical Field

The invention relates to an electromagnet, in particular to a proportional electromagnet, and belongs to the technical field of electromagnet manufacturing.

Background

The proportional electromagnet is a commonly used component in a hydraulic control system, is matched with a hydraulic valve to control the hydraulic system, requires stable pressure and reduces fluctuation in hydraulic control, has a larger relation with the stability of system pressure and the electromagnet, is provided with an oil passing hole (a liquid passing hole) on an armature (a moving iron) of the electromagnet, is used for balancing pressure through liquid when the armature moves, and has inconsistent aperture on the whole length of the oil passing hole, so that damping can be generated in the movement of the armature, the action of the valve can reach a stable requirement under the condition of meeting response time, the pressure in the control system is stable, practices prove that the damping of the oil passing hole of the proportional electromagnet and the pressure stability of the system have a larger relation, and the stability of the system pressure is crucial in some occasions, such as in the control of molten iron transfer in a steel mill, no vibration is allowed to occur, the pressure must be stable and is also required in some situations where flammable, explosive and harmful media are working.

However, the damping of the conventional proportional solenoid valve cannot realize the stable control of the valve on the pressure under some conditions, which causes the pressure instability of the hydraulic system, and the following conditions are mainly adopted: firstly, the electromagnet and the valve are adjusted during installation and debugging, so that the pressure of a system is as stable as possible when the valve works, the proportional solenoid valve is an element produced according to a standard, the damping is certain, however, different valve manufacturers matched with the solenoid valve cannot match some valves in any way, and in this case, the valve or the electromagnet can only be replaced if the pressure stability is required; secondly, even if the electromagnet is well matched with the valve during installation and debugging, the damping performance of the electromagnet can be affected along with the abrasion of the valve and the electromagnet and the deposition of impurities in a liquid medium in the element, particularly in an oil through hole, so that the pressure is not stably controlled during the use process, for example, in a hydraulic system of a steel mill, because the hydraulic system of a steel mill adopts the flame-retardant water glycol, the water glycol is easy to crystallize, crystals are deposited in the electromagnet to cause the clamping stagnation of the electromagnet, the electromagnet cannot run according to the designed F-S curve, the pressure control of the system fluctuates, the crystallization is deposited in the oil passing hole to cause large damping change and cause unstable pressure control, the pressure of the molten iron system of the steel mill is not allowed to fluctuate, so that only the electromagnet can be replaced after the phenomenon occurs.

Disclosure of Invention

The invention aims to overcome the defect that the conventional proportional electromagnet cannot relatively adjust the unstable pressure in hydraulic control, and provides an adjustable proportional electromagnet.

In order to realize the purpose of the invention, the following technical scheme is adopted: an adjustable proportion electromagnet comprises a shell, a plastic package coil and a magnetic core tube are arranged in the shell, the magnetic core tube comprises a guide sleeve, a moving iron is arranged in the guide sleeve, the push rod is fixedly connected with the moving iron, a plurality of oil passing holes are arranged on the moving iron, the rear end hole of the guide sleeve is internally provided with a screw thread, the tail cap is screwed at the rear end of the guide sleeve through the screw thread, a spring is arranged between the tail cap and the rear end of the moving iron, one end of the spring is pressed on the moving iron, the other end of the spring is pressed on the tail cap, the rear end of the oil passing hole is provided with a section of threaded hole, a screwed pipe is screwed in the threaded hole, the screwed pipe is provided with a middle hole, the rear end of the screwed pipe is provided with a clamping part matched with a wrench or a screwdriver, the screwed pipe has a plurality of replacement screwed pipes, the mesopores of a plurality of replacement screwed pipes are different in size, any one screwed pipe can be screwed with the threaded hole, and the screwed pipe can be replaced by detaching the tail cap from the guide sleeve.

Further, the method comprises the following steps of; the tail cap is provided with a sealing ring groove, a sealing ring is arranged in the sealing ring groove, and the sealing ring is positioned between the rear end hole of the guide sleeve and the tail cap.

Further, the method comprises the following steps of; and a fastening nut is screwed on the periphery of the tail end of the magnetic core tube.

Further, the method comprises the following steps of; the movable iron is provided with two oil passing holes which are symmetrical about an axis.

Further, the method comprises the following steps of; the rear end of the moving iron is provided with a counter bore, the spring is positioned in the counter bore, and the oil passing hole is positioned in the range of the counter bore.

Further, the method comprises the following steps of; the solenoid is T-shaped, and the rear end of the oil passing hole is a stepped hole matched with the T-shaped solenoid.

Further, the method comprises the following steps of; and a section of small hole is also arranged in the middle hole of part or all of the spiral pipes, the length of each small hole is different, and the positions of the small holes in the middle hole in the front-back direction are different.

The invention has the positive and beneficial technical effects that: the tail cap is screwed at the rear end of the guide sleeve through the threads, so that the following effects can be realized: firstly, when the electromagnet is installed and debugged, the solenoid can be replaced after the tail cap is removed under the condition that the matching control of the electromagnet and the valve is not good, so that the damping size is changed, the electromagnet is better matched with the valve when the electromagnet is installed and debugged, the pressure control is stable, secondly, the tail cap can be detached to clean the inside after the unstable control condition occurs in the use process, the impurities in the inside are eliminated, and the pressure control of the valve is more stable; thirdly, under the condition that stable control cannot be realized after cleaning in the using process, the stability of pressure control can be realized by replacing the solenoid and the spring.

The invention can change the fixed damping of the electromagnet when leaving factory into the adjustable damping during installation, debugging and use, and the spring can be replaced according to the debugging condition.

Drawings

Figure 1 is a schematic view of an electromagnet according to the present invention.

Fig. 2 is a schematic view of a core tube.

Fig. 3 is a schematic view of the tail cap.

Fig. 4 is a comparative illustration of different orifices in different spirals.

Detailed Description

In order to more fully explain the implementation of the invention, an implementation example of the invention is provided. These examples are merely illustrative of the invention and do not limit the scope of the invention.

The invention is explained in further detail in connection with the accompanying drawings, in which: 1: a housing; 2: plastically packaging the coil; 3: a guide sleeve; 4: moving iron; 5: a push rod; 6: a tail cap; 7: a spring; 8: a counter bore; 9: a solenoid; 10: a mesopore; 11: a nut; 12: a seal ring; 13: a seal ring groove; 14: milling two square parts; 15: a small hole; 16: and an oil passing hole.

As shown in the attached drawings, the proportion-adjustable electromagnet comprises a shell 1, a plastic package coil 2 and a magnetic core tube are mounted in the shell, the magnetic core tube comprises a guide sleeve 3, a moving iron 4 is mounted in the guide sleeve, a push rod 5 is fixedly connected to the moving iron, and the moving iron is provided with a plurality of oil passing holes 16.

The guide sleeve is characterized in that a screw thread is arranged in the hole at the rear end of the guide sleeve, the tail cap is screwed at the rear end of the guide sleeve through the screw thread, a sealing ring groove 13 is formed in the tail cap, a sealing ring 12 is arranged in the sealing ring groove, and the sealing ring is positioned between the hole at the rear end of the guide sleeve and the tail cap.

Install the spring between the rear end of tail cap and moving iron, the one end of spring is pressed on moving iron, one end is pressed and is established on the tail cap, in this embodiment, the moving iron rear end have counter bore 8, the spring is located the counter bore, the oilhole is located the within range of counter bore.

The rear end of the oil passing hole is provided with a section of threaded hole, a screwed pipe is screwed in the threaded hole, a middle hole is formed in the screwed pipe, the rear end of the screwed pipe is provided with a clamping part matched with a wrench or a screwdriver, the screwed pipe is T-shaped, and the rear end of the oil passing hole is a stepped hole matched with the T-shaped screwed pipe. The screwed pipe has a plurality of replacement screwed pipes, the mesopores of a plurality of replacement screwed pipes are different in size, any one screwed pipe can be screwed with the threaded hole, and the screwed pipe can be replaced by detaching the tail cap from the guide sleeve. And a fastening nut 11 is screwed on the periphery of the tail end of the magnetic core tube.

Part or all of the central holes of the spiral pipes are also provided with a section of small holes 15, the length of each small hole is different, and the positions of the small holes in the central holes in the front-back direction are different. Because the damping that the aperture produced at different positions, the aperture of different length is inconsistent, so can realize more accurate debugging through setting up the aperture, guarantee the pressure stability of system.

After the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the appended claims, and any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the invention fall within the scope of the invention, and the invention is not limited to the embodiments illustrated in the description.

Claims

1. The utility model provides an adjustable proportion electro-magnet, includes the shell, installs plastic envelope coil, magnetic core pipe in the shell, the magnetic core pipe include the guide pin bushing, install in the guide pin bushing and move the iron, push rod fixed connection has a plurality of oilholes, its characterized in that on moving the iron: the guide pin bushing rear end downthehole screw thread that has, the tail cap connects at the guide pin bushing rear end through the screw thread soon, installs the spring between the rear end of tail cap and moving iron, the one end of spring is pressed on moving iron, one end is pressed and is established on the tail cap, has one section screw hole at the rear end of crossing the oilhole, and the screw hole internal rotation has the screwed pipe, has the mesopore on the screwed pipe, the rear end of screwed pipe have with spanner or screwdriver matched with joint portion, the screwed pipe have a plurality of substitute screwed pipes, the mesopore size of a plurality of substitute screwed pipes is different, arbitrary screwed pipe all can with between the screw hole connect soon, the accessible is lifted off the tail cap from the guide pin bushing and is changed the screwed pipe.

2. An adjustable ratio electromagnet as claimed in claim 1, wherein: the tail cap is provided with a sealing ring groove, a sealing ring is arranged in the sealing ring groove, and the sealing ring is positioned between the rear end hole of the guide sleeve and the tail cap.

3. An adjustable ratio electromagnet as claimed in claim 1, wherein: and a fastening nut is screwed on the periphery of the tail end of the magnetic core tube.

4. An adjustable ratio electromagnet as claimed in claim 1, wherein: the movable iron is provided with two oil passing holes which are symmetrical about an axis.

5. An adjustable ratio electromagnet as claimed in claim 1, wherein: the rear end of the moving iron is provided with a counter bore, the spring is positioned in the counter bore, and the oil passing hole is positioned in the range of the counter bore.

6. An adjustable ratio electromagnet as claimed in claim 1, wherein: the solenoid is T-shaped, and the rear end of the oil passing hole is a stepped hole matched with the T-shaped solenoid.

7. An adjustable ratio electromagnet as claimed in claim 1, wherein: and a section of small hole is also arranged in the middle hole of part or all of the spiral pipes, the length of each small hole is different, and the positions of the small holes in the middle hole in the front-back direction are different.