Noise reduction protection type switch electromagnet

Abstract

A noise reduction protection type switch electromagnet comprises a shell, a coil and a magnetic core tube, the coil is located in the shell, the magnetic core tube penetrates through the coil, the magnetic core tube comprises static iron and a guide sleeve which are fixedly connected together, moving iron is installed in the guide sleeve in a sliding mode, a push rod hole is formed in the static iron, and a push rod is installed in the push rod hole in a sliding mode. The push rod comprises a main body rod, a tail rod is fixedly connected or integrally arranged at the end, close to the movable iron, of the main body rod, the tail rod is thinner than the main body rod, the tail rod is sleeved with a spring, the length of the spring is larger than that of the tail rod, and the two ends of the magnetic core pipe are exposed out of the shell. A threaded protective cap is screwed on the magnetic core tube at the static iron end through threads, and a fastening nut is screwed on the magnetic core tube at the guide sleeve end through threads. The electromagnet can reduce noise and prolong the service life of the product.

Description

Technical Field

[0001] The utility model relates to an electromagnet, in particular to a switch electromagnet with low noise and long life, belonging to the technical field of electromagnetics. Background Art

[0002] A switch electromagnet is a device that generates electromagnetism when powered on. A conductive winding matching its power is wound around the outside of the iron core. The electromagnet is magnetic when powered on, and the magnetism disappears when powered off. When the switch electromagnet is connected to a valve, it can control the switch of the valve. When the current switch electromagnet is powered off, the liquid will fluctuate, so the liquid in the controlled valve will impact the push rod, and the push rod will be impacted by the wave-like impact of the liquid and hit the tongue iron (when the push rod and the tongue iron are movably connected), so that the tongue iron is not only impacted by the push rod, but also by the impact of the push rod and the pipe wall, causing damage to the tongue iron. This situation not only affects the service life of the electromagnet, but also makes the electromagnet produce obvious impact noise when powered off. The impact noise not only produces noise pollution, but also generates fault noise when some aspects of the system fail. The fault noise is likely to be covered by the impact noise and difficult to be discovered, which may cause more serious consequences. Summary of the invention

[0003] The purpose of the utility model is to overcome the above problems existing in the current switch electromagnet and provide a noise reduction protection type switch electromagnet.

[0004] To achieve the purpose of the utility model, the following technical scheme is adopted: a noise reduction protection type switch electromagnet, including a shell, a coil, and a magnetic core tube, the coil is located in the shell, and the magnetic core tube passes through the coil, the magnetic core tube includes a static iron and a guide sleeve fixedly connected together, the moving iron is slidably installed in the guide sleeve, a push rod hole is opened on the static iron, the push rod is slidably installed in the push rod hole, and a pipe cap is fixedly installed at the guide sleeve end away from the static iron, the push rod includes a main rod, a tail rod is fixedly connected or integrally provided at the end of the main rod close to the moving iron, the tail rod is thinner than the main rod, a spring is sleeved on the tail rod, the length of the spring is greater than the length of the tail rod, both ends of the magnetic core tube are exposed from the shell, a threaded protective cap is screwed on the magnetic core tube at the static iron end, and a fastening nut is screwed on the magnetic core tube at the guide sleeve end.

[0005] Further; a hole is opened in the center of the pipe cap, a manual push rod is slidably passed through the hole, an annular sealing groove is opened on the manual push rod, a sealing ring is installed in the sealing groove, the manual push rod is T-shaped, and the large head of the T-shaped is located in the pipe cap.

[0006] Furthermore, the main rod is in the shape of a hexagonal prism, and an oil-repellent hole is provided on the moving iron.

[0007] Furthermore, sealing rings are provided between the magnetic core tube and the threaded protective cap, between the tube cap and the guide sleeve, and between the magnetic core tube and the fastening nut, and the sealing rings are nitrile rubber sealing rings.

[0008] The electromagnet is provided with a push rod and a spring so that when the electromagnet is powered off and the valve loses its restriction, the liquid (usually oil) impacts the push rod, causing the push rod to move. The impact on the push rod will be elastically compressed by the spring, reducing the impact force to be received to a minimum, and the elastic contact will cause the tongue iron to move backward smoothly, and will not collide with the pipe wall due to direct impact of the push rod, thereby achieving the purpose of protecting the tongue iron and greatly improving the service life of the tongue iron. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is an internal schematic diagram of the utility model when power is supplied.

[0010] Figure 2 It is a schematic diagram of the magnetic core tube when the power is off. DETAILED DESCRIPTION

[0011] In order to more fully explain the implementation of the utility model, implementation examples of the utility model are provided. These implementation examples are only for the purpose of illustrating the utility model and do not limit the scope of the utility model.

[0012] The present invention is further explained in detail in conjunction with the accompanying drawings, in which the following are marked as follows: 1: housing; 2: coil; 3: guide sleeve; 4: static iron; 5: moving iron; 6: oil-draining hole; 7: main rod; 8: main rod; 8: tail rod; 9: spring; 10: pipe cap; 11: threaded protective cap; 12: fastening nut; 13: manual push rod; 14: sealing ring.

[0013] As attached Figure 1 , Figure 2 As shown, a noise reduction protection type switch electromagnet includes a shell 1, a coil 2, and a magnetic core tube. The coil 2 is located in the shell 1, and the magnetic core tube passes through the coil. The magnetic core tube includes a static iron 4 and a guide sleeve 3 fixedly connected together, and a moving iron 5 is slidably installed in the guide sleeve. An oil-repelling hole 6 is provided on the moving iron; a pipe cap 10 is fixedly installed at the end of the guide sleeve away from the static iron, a hole is provided in the center of the pipe cap, and a manual push rod 13 is slidably passed through the hole, an annular sealing groove is provided on the manual push rod, and a sealing ring 14 is installed in the sealing groove. The manual push rod is T-shaped, and the large head of the T is located in the pipe cap.

[0014] A push rod hole is opened on the static iron 4, and the push rod is slidably installed in the push rod hole. The push rod includes a main rod 7, which is a hexagonal prism. A tail rod 8 is fixedly connected or integrally arranged at the end of the main rod 7 close to the moving iron. The tail rod is thinner than the main rod. A spring 9 is sleeved on the tail rod 8, and the length of the spring is greater than the length of the tail rod. The two ends of the magnetic core tube are exposed from the shell 1, and a threaded protective cap 11 is screwed on the magnetic core tube at the static iron end, and a fastening nut 12 is screwed on the magnetic core tube at the guide sleeve end. Sealing rings are arranged between the magnetic core tube and the threaded protective cap, between the tube cap and the guide sleeve, and between the magnetic core tube and the fastening nut. The sealing ring is a nitrile rubber sealing ring.

[0015] When the power is off, the push rod and moving iron of the traditional switch electromagnet are similar to "floating" in the oil, and they move freely with the fluctuation of the oil to produce collisions. Due to the addition of a tail rod and a spring, the electromagnet can buffer and absorb energy when the push rod and armature are impacted by the oil, thereby reducing noise and extending the service life of the electromagnet.

[0016] After describing the implementation mode of the utility model in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the scope of the technical solution of the utility model, and the utility model is not limited to the implementation mode of the examples given in the specification.

Claims

1. A noise reduction protection switch electromagnet, comprising a housing, a coil, and a magnetic core tube, wherein the coil is located in the housing, and the magnetic core tube passes through the coil, wherein the magnetic core tube comprises a stationary iron and a guide sleeve fixedly connected together, wherein the moving iron is slidably installed in the guide sleeve, wherein a push rod hole is provided on the stationary iron, wherein the push rod is slidably installed in the push rod hole, and a pipe cap is fixedly installed at the end of the guide sleeve away from the stationary iron, wherein the pipe cap is fixedly installed at the end of the guide sleeve away from the stationary iron, wherein the moving iron is slidably installed in the guide sleeve, and ... The push rod includes a main rod, a tail rod is fixedly connected or integrally arranged at the end of the main rod close to the moving iron, the tail rod is thinner than the main rod, a spring is sleeved on the tail rod, the length of the spring is greater than the length of the tail rod, both ends of the magnetic core tube are exposed from the outer shell, a threaded protective cap is screwed on the magnetic core tube at the static iron end, and a fastening nut is screwed on the magnetic core tube at the guide sleeve end.

2. A noise reduction protection switch electromagnet according to claim 1, characterized in that: A hole is provided in the center of the pipe cap, a manual push rod is slidably inserted in the hole, an annular sealing groove is provided on the manual push rod, a sealing ring is installed in the sealing groove, the manual push rod is T-shaped, and the large head of the T is located in the pipe cap.

3. The noise reduction protection switch electromagnet according to claim 1, characterized in that: The main body rod is in the shape of a hexagonal prism, and an oil-repellent hole is opened on the moving iron.

4. The noise reduction protection switch electromagnet according to claim 1, characterized in that: Sealing rings are arranged between the magnetic core tube and the threaded protective cap, between the tube cap and the guide sleeve, and between the magnetic core tube and the fastening nut. The sealing rings are nitrile rubber sealing rings.

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