阅读说明：本技术 直动式电磁单向阀 (Direct-acting electromagnetic one-way valve ) 是由 朱世钰 朱宝京 于 2019-12-11 设计创作，主要内容包括：本发明公开了直动式电磁单向阀,属于单向阀,其结构包括电磁铁线圈、电磁铁中套、电磁铁推杆、阀体、过渡推杆、阀芯、阀套和端堵,端堵与阀套之间设置有阀套压盖,阀套内设置有阀芯,阀芯与阀套压盖之间的空腔内设置有复位弹簧,阀体上设置有上油口和下油口,阀芯上设置有阻尼孔、第一油道、第二油道,阻尼孔连通阀芯左侧内腔、阀芯右侧的阀套内腔、下油口及电磁铁中套内部,第一油道与阀芯内腔相通,与第二油道之间通过钢球阻隔,第二油道与上油口相通,钢球的右侧设置有过渡推杆,过渡推杆与阀芯右端相连,过渡推杆的右侧设置有电磁铁推杆。本发明具有加工简单、反向无泄露、降低成本、阀芯响应速度快、反向流动无压力损失等特点。(The invention discloses a direct-acting electromagnetic one-way valve, which belongs to a one-way valve and structurally comprises an electromagnet coil, an electromagnet middle sleeve, an electromagnet push rod, a valve body, a transition push rod, a valve core, a valve sleeve and an end plug, wherein a valve sleeve gland is arranged between the end plug and the valve sleeve, the valve core is arranged in the valve sleeve, a reset spring is arranged in a cavity between the valve core and the valve sleeve gland, an upper oil port and a lower oil port are arranged on the valve body, a damping hole, a first oil duct and a second oil duct are arranged on the valve core, the damping hole is communicated with an inner cavity on the left side of the valve core, an inner cavity on the right side of the valve core, the lower oil port and the inside of the electromagnet middle sleeve, the first oil duct is communicated with the inner cavity of the valve core and is blocked by a steel ball, the. The invention has the characteristics of simple processing, no leakage in the reverse direction, cost reduction, high response speed of the valve core, no pressure loss in the reverse flow and the like.)

1. Direct action type electromagnetism check valve, characterized by: the electromagnetic valve comprises an electromagnet coil, an electromagnet middle sleeve, an electromagnet push rod, a valve body, a transition push rod, a valve core, a valve sleeve and an end plug, wherein the valve body is arranged on the left side of the electromagnet coil, the end plug, the valve sleeve and the electromagnet middle sleeve are sequentially arranged in a main hole of the valve body from left to right, a valve sleeve gland is arranged between the end plug and the valve sleeve, the valve core is arranged in the valve sleeve, a reset spring is arranged in a cavity between the valve core and the valve sleeve gland, an upper oil port and a lower oil port are arranged on the valve body, a damping hole, a first oil duct and a second oil duct are arranged on the valve core, the damping hole is communicated with an inner cavity on the left side of the valve core, an inner cavity on the right side of the valve core, the lower oil port and the inner part of the electromagnet middle sleeve, the first oil duct is communicated, the right side of the steel ball is provided with a transition push rod, the transition push rod is connected with the right end of the valve core, the right side of the transition push rod is provided with an electromagnet push rod, the electromagnet push rod is arranged in an electromagnet middle sleeve, the electromagnet middle sleeve is connected with the right side of a main hole of the valve body, and an electromagnet coil is arranged on the right side of the valve body.

2. A direct acting electromagnetic check valve as defined in claim 1, wherein: the electromagnet middle sleeve is in threaded connection with the right side of the main hole of the valve body.

3. A direct acting electromagnetic check valve as defined in claim 1, wherein: the end plug is in threaded connection with the left side of the main hole of the valve body.

4. A direct acting electromagnetic check valve as defined in claim 1, wherein: the left end of the valve sleeve is connected with the end plug thread.

5. A direct acting electromagnetic check valve as defined in claim 1, wherein: the transition push rod is in threaded connection with the right end of the valve core.

6. A direct acting electromagnetic check valve as defined in claim 1, wherein: and an O-shaped sealing ring and a check ring are respectively arranged between the valve sleeve and the valve body, between the valve sleeve and the valve sleeve gland and between the valve body and the electromagnet middle sleeve.

7. A direct acting electromagnetic check valve as defined in claim 1, wherein: o-shaped sealing rings are respectively arranged between the valve body and the end plug, between the valve core and the valve sleeve and between the transition push rod and the valve core.

8. A direct acting electromagnetic check valve as defined in claim 1, wherein: the contact position of the inner conical surface on the right side of the inner cavity of the valve sleeve and the circumferential closed angle on the right side of the excircle of the valve core is sealed by a conical surface, and the contact position of the circumferential closed angle on the right end of the first oil duct on the valve core and the steel ball is sealed by a spherical surface.

Technical Field

The invention relates to a check valve, in particular to a direct-acting electromagnetic check valve.

Background

The electromagnetic one-way valve commonly used in the hydraulic industry at present is generally of a pilot-operated structure, the pilot valve of the electromagnetic one-way valve is a micro one-way valve operated by a pull-type electromagnet, the diameter of a valve seat in the micro one-way valve, which is matched and sealed with the conical surface of a conical valve core, is extremely small, the requirement on form and position tolerance is very high, and special equipment is required for processing, so the processing cost is very high, the pollution resistance is poor, the response time of the valve core is long, and when the electromagnet is electrified and oil pushes away the valve core to realize reverse flow, the force of the valve core reset spring needs to be overcome firstly.

Disclosure of Invention

The technical task of the invention is to provide a direct-acting electromagnetic one-way valve aiming at the defects in the prior art, and the direct-acting electromagnetic one-way valve has the characteristics of strong pollution resistance, simple processing, no leakage in the reverse direction, low cost, high response speed of a valve core and no pressure loss in the reverse flow.

The technical scheme adopted by the invention for solving the technical problems is as follows: the electromagnetic valve comprises an electromagnet coil, an electromagnet middle sleeve, an electromagnet push rod, a valve body, a transition push rod, a steel ball, a valve core, a valve sleeve gland and an end plug, wherein the valve body is arranged on the left side of the electromagnet coil, the end plug, the valve sleeve and the electromagnet middle sleeve are sequentially arranged in a main hole of the valve body from left to right, the valve sleeve gland is arranged between the end plug and the valve sleeve, the valve core is arranged in the valve sleeve, a reset spring is arranged in a cavity between the valve core and the valve sleeve gland, an upper oil port and a lower oil port are arranged on the valve body, a damping hole, a first oil duct and a second oil duct are arranged on the valve core, the damping hole is communicated with an inner cavity on the left side of the valve core, an inner cavity on the right side of the valve core, the lower oil port and the inner part of the electromagnet middle sleeve, the first oil, the right side of the steel ball is provided with a transition push rod, the transition push rod is connected with the right end of the valve core, the right side of the transition push rod is provided with an electromagnet push rod, the electromagnet push rod is arranged in an electromagnet middle sleeve, the electromagnet middle sleeve is connected with the right side of a main hole of the valve body, and an electromagnet coil is arranged on the right side of the valve body.

The electromagnet middle sleeve is in threaded connection with the right side of the main hole of the valve body.

The end plug is in threaded connection with the left side of the main hole of the valve body.

The left end of the valve sleeve is connected with the end plug thread.

The transition push rod is in threaded connection with the right end of the valve core.

And an O-shaped sealing ring and a check ring are respectively arranged between the valve sleeve and the valve body, between the valve sleeve and the valve sleeve gland and between the valve body and the electromagnet middle sleeve.

O-shaped sealing rings are respectively arranged between the valve body and the end plug, between the valve core and the valve sleeve and between the transition push rod and the valve core.

The contact position of the inner conical surface on the right side of the inner cavity of the valve sleeve and the circumferential closed angle on the right side of the excircle of the valve core is sealed by a conical surface, and the contact position of the circumferential closed angle on the right end of the first oil duct on the valve core and the steel ball is sealed by a spherical surface.

Compared with the prior art, the direct-acting electromagnetic one-way valve has the following outstanding beneficial effects: the anti-pollution capacity is strong, the processing technology is simple, the processing cost is low, the reverse sealing of the valve core is reliable, and the electromagnet push rod directly acts on the valve core, so that the force of the reset spring of the one-way valve core is not required to be overcome when oil reversely flows, the pressure loss is reduced, and the application field is wider.

Drawings

FIG. 1 is a schematic structural diagram of a direct-acting electromagnetic check valve;

description of reference numerals: 1. the electromagnetic valve comprises an electromagnet coil, 2, an electromagnet middle sleeve, 3, an electromagnet push rod, 4, a valve body, 5, a transition push rod, 6, a valve core, 7, a valve sleeve, 71, an inner conical surface, 8, an end plug, 9, a valve sleeve gland, 10, a reset spring, 11, an upper oil port, 12, a lower oil port, 13, a damping hole, 14, a first oil duct, 15, a second oil duct, 16, a steel ball, 17, an O-shaped sealing ring, 18, a retainer ring, 19 and a valve sleeve circumferential radial hole.

Detailed Description

The direct-acting electromagnetic check valve of the present invention will be described in detail below with reference to fig. 1 of the specification.

The invention relates to a direct-acting electromagnetic one-way valve which structurally comprises an electromagnet coil 1, an electromagnet middle sleeve 2, an electromagnet push rod 3, a valve body 4, a transition push rod 5, a steel ball 16, a valve core 6, a valve sleeve 7, an end plug 8 and a valve sleeve gland 9, wherein the valve body 4 is arranged on the left side of the electromagnet coil 1, the end plug 8, the valve sleeve 7 and the electromagnet middle sleeve 2 are sequentially arranged in a main hole of the valve body 4 from left to right, the valve sleeve gland 9 is arranged between the end plug 8 and the valve sleeve 7, the valve core 6 is arranged in the valve sleeve 7, a reset spring 10 is arranged in a cavity between the valve core 6 and the valve sleeve gland 9, an upper oil port 11 and a lower oil port 12 are arranged on the valve body 4, a damping hole 13, a first oil duct 14 and a second oil duct 15 are arranged on the valve core 6, the damping hole 13 is communicated with an inner cavity on the left side, the first oil duct 14 is communicated with an inner cavity on the left side of the valve core 6 and is separated from the second oil duct 15 through a steel ball 16, the second oil duct 15 is communicated with the upper oil port 11 through a valve sleeve circumferential radial hole 19, a transition push rod 5 is arranged on the right side of the steel ball 16, the transition push rod 5 is connected with the right end of the valve core 6, an electromagnet push rod 3 is arranged on the right side of the transition push rod 5, the electromagnet push rod 3 is arranged in an electromagnet middle sleeve 2, the electromagnet middle sleeve 2 is connected with the right side of a main hole of the valve body 4, and an electromagnet coil 1 is arranged on the right side of the valve body 4.

The electromagnet middle sleeve 2 is in threaded connection with the right side of the main hole of the valve body 4.

The end plug 8 is in threaded connection with the left side of the main hole of the valve body 4.

The left end of the valve sleeve 7 is in threaded connection with the end plug 8.

The transition push rod 5 is in threaded connection with the right end of the valve core 6.

And an O-shaped sealing ring 17 and a check ring 18 are respectively arranged between the valve sleeve 7 and the valve body 4, between the valve sleeve 7 and the valve sleeve gland 9 and between the valve body 4 and the electromagnet middle sleeve 2.

O-shaped sealing rings 17 are respectively arranged between the valve body 4 and the end plug 8, between the valve core 6 and the valve sleeve 7 and between the transition push rod 5 and the valve core 6.

The contact position of the inner conical surface 71 on the right side of the inner cavity of the valve sleeve 7 and the circumferential closed angle on the right side of the excircle of the valve core 6 is sealed by a conical surface, and the contact position of the circumferential closed angle on the right end of the first oil duct 14 on the valve core 6 and the steel ball 16 is sealed by a spherical surface.

When the electromagnet coil 1 is powered off and no oil flows into the upper oil port 11 and the lower oil port 12 (or the oil pressure of the upper oil port 11 is equal to that of the lower oil port 12), the valve element 6 is reset by the reset spring 10, and the circumferential sharp angle on the right side of the excircle of the valve element 6 is in close contact with and sealed with the inner conical surface 71 on the right side of the inner cavity of the valve sleeve 7.

When the electromagnet coil 1 is powered off, oil enters from the upper oil port 11 (namely the oil pressure of the upper oil port 11 is greater than the oil pressure of the lower oil port 12), the oil acts on the right side of the steel ball 16 through the second oil duct 15, because the contact position of the steel ball 16 and the sharp angle of the circumference of the right end of the first oil duct 14 is in spherical sealing and is reversely cut off, therefore, the oil can not enter the lower oil port 12 communicated with the first oil duct 14 and the damping hole 13, and because the sealing surface of the sharp angle on the right side of the excircle of the valve core 6 is equal to the force-bearing area on the left side of the valve core 6, and the oil pressure on the left side and the right side of the valve core 6 communicated with the damping hole 13 is equal to the lower oil port 12, the oil pressure acting force on the left side and the right side of the valve core 6 is equal, the sharp angle on the right side of the excircle of the valve core 6 is pressed and sealed with the inner conical, the oil cannot enter the lower oil port 12 from the upper oil port 11, which corresponds to the reverse blocking function of the check valve.

When the electromagnet coil 1 is powered off and oil enters from the lower oil port 12 (namely the oil pressure of the lower oil port 12 is greater than the oil pressure of the upper oil port 11), the oil flows into the spring cavity on the left side of the valve core 6 through the damping hole 13, the steel ball 16 is pushed open through the first oil duct 14 to flow into the second oil duct 15, and the oil flows out from the upper oil port 11, because the oil passing capacity of the first oil duct 14 and the second oil duct 15 is far greater than that of the damping hole 13, pressure difference can be generated between the right side and the left side of the valve core 6 when the oil flows through the damping hole 13, the oil pressure on the right side of the valve core 6 is greater than that on the left side, namely, pressure difference is generated between the lower oil port 12 and the spring cavity on the left side of the valve core 6, the oil can overcome the friction force between the reset spring 10 and the valve sleeve 7 of the valve.

From the above analysis, it can be known that, in two states that the oil pressure of the upper oil port 11 is equal to that of the lower oil port 12 and the oil pressure of the upper oil port 11 is greater than that of the lower oil port 12, when the electromagnet coil 1 is powered off, the oil pressure acting forces on the left side and the right side of the valve core 6 are equal, except that the pre-compression force of the return spring 10 is added to the left end of the valve core 6; because the lower oil port 12 is communicated with the inside of the electromagnet middle sleeve 2, no matter whether the electromagnet coil 1 is electrified or not, no matter which oil port oil liquid flows in from, the oil pressure of the left side and the right side of the electromagnet push rod 3 is equal to that of the lower oil port 12, and the stress areas of the left side and the right side are equal, so that the oil pressure acting force of the left side and the right side of the electromagnet push rod 3 is always equal, when the electromagnet coil 1 is electrified, as long as the electromagnetic thrust output by the electromagnet push rod 3 is greater than the sum of the pre-compression force of the reset spring 10 and the friction force between the valve core 6 and the valve sleeve 7, the electromagnet push rod 3 can push the transition push rod 5 and drive the valve core 6 to move leftwards, so that the circumferential sharp corner on the.

When the electromagnet coil 1 is electrified and the oil pressure of the lower oil port 12 is greater than the oil pressure of the upper oil port 11, namely oil flows in from the lower oil port 12, the electromagnetic thrust output by the electromagnet push rod 3 and the oil acting force overcome the restoring force of the restoring spring 10 and the friction force between the valve core 6 and the valve sleeve 7, the valve core 6 is pushed open, and the oil flows out from the upper oil port 11.

In the direct-acting electromagnetic one-way valve, if the valve core 6 is not provided with the first oil duct 14 and the second oil duct 15 and the steel ball 16 is not placed, the valve becomes an electromagnetic stop valve, the upper oil port 11 and the lower oil port 12 are not communicated when the electromagnet is powered off, and the two oil ports are communicated when the electromagnet is powered on.

The highest working pressure of the upper oil port 11 and the lower oil port 12 of the direct-acting electromagnetic check valve is 35 MPa.

The above-mentioned embodiments are only for understanding the present invention, and are not intended to limit the technical solutions of the present invention, and those skilled in the art can make various changes or modifications based on the technical solutions described in the claims, and all equivalent changes or modifications should be covered by the scope of the claims of the present invention. The present invention is not described in detail, but is known to those skilled in the art.