Power-off manual emergency switch for electromagnetic reversing valve of hydraulic station

Abstract

The utility model relates to a power-off manual emergency switch for an electromagnetic directional valve of a hydraulic station. The shell is provided with an inner cavity, one end of the inner cavity is provided with a socket to be matched with the electromagnetic reversing valve in an inserted mode, and the other end of the inner cavity is provided with a section of internal threads. The adjusting mechanism comprises an adjusting sliding sleeve and an adjusting hand wheel, external threads are arranged on the peripheral face of the adjusting sliding sleeve to be matched with the internal threads, the adjusting hand wheel is located at the outer end of the adjusting sliding sleeve, the length of the portion, stretching into the inner cavity, of the adjusting sliding sleeve is changed by rotating the adjusting hand wheel, and a blind hole is formed in the inner end of the adjusting sliding sleeve; the adjusting valve element comprises a guide part in guide sliding fit with the inner wall of the inner cavity, a limiting shaft is arranged on one side of the guide part, a pushing shaft is arranged on the other side of the guide part, the limiting shaft moves in the blind hole, the pushing shaft is used for stretching into the electromagnetic reversing valve from the bell and spigot to push the ejector pin, and the limiting shaft is sleeved with a pushing spring. One end of the pushing spring abuts against the adjusting sliding sleeve, and the other end of the pushing spring abuts against the adjusting valve element in a pushing mode. The problem that the ejector pin is bent and damaged can be solved.

Description

Technical Field

[0001] The utility model relates to a power-off manual emergency switch for an electromagnetic reversing valve of a hydraulic station. Background Art

[0002] The electromagnetic reversing valve is a core component in a single-loop hydraulic station and plays a role in hydraulic control. The electromagnetic reversing valve includes a valve body, a reversing valve core, and an electromagnet coil for driving the reversing valve core. A thimble is connected to the reversing valve core so that when a power outage occurs, the thimble can be manually pushed to achieve the reversing of the reversing valve. However, in the prior art, when operating the thimble, since the thimble is inside and has a small diameter, during the process of pushing the thimble with an external force and relying on the thimble to push the reversing valve core to reverse, since it is impossible to determine when the reversing valve core reaches the corresponding valve position, there is often a situation where the external force still pushes the thimble after the reversing valve core is in place, resulting in the thimble being bent and deformed under the action of the external force and unable to be used normally subsequently. Content of the Utility Model

[0003] The purpose of the utility model is to provide a power-off manual emergency switch for an electromagnetic reversing valve of a hydraulic station to solve the technical problem that the thimble of the electromagnetic reversing valve is easily completely deformed and unable to be used normally.

[0004] The technical solution of the utility model is as follows: A power-off manual emergency switch for an electromagnetic reversing valve of a hydraulic station includes:

[0005] A housing having an inner cavity. One end of the inner cavity has a socket for plugging and mating with the electromagnetic reversing valve, and the other end of the inner cavity is provided with a section of internal thread;

[0006] An adjusting mechanism including an adjusting sleeve and an adjusting handwheel. The outer peripheral surface of the adjusting sleeve is provided with an external thread for mating with the internal thread. The adjusting handwheel is located at the outer end of the adjusting sleeve. By rotating the adjusting handwheel, the length of the adjusting sleeve extending into the inner cavity is changed. A blind hole is provided at the inner end of the adjusting sleeve;

[0007] A regulating valve core including a guiding portion that is slidably and guidingly fitted with the inner wall of the inner cavity. A limiting shaft is provided on one side of the guiding portion, and a pushing shaft is provided on the other side. The limiting shaft moves in the blind hole, and the pushing shaft is used to extend from the socket into the electromagnetic reversing valve to push the thimble. A pushing spring is sleeved on the limiting shaft. One end of the pushing spring is in abutting cooperation with the adjusting sleeve, and the other end is in abutting cooperation with the regulating valve core.

[0008] Further, a limiting structure is provided between the limiting shaft and the adjusting sleeve for limiting the limiting shaft so that the limiting shaft can displace within a set range.

[0009] Further, the limiting structure includes a long hole provided on the limiting shaft. The length of the long hole extends along the axial direction of the limiting shaft. It also includes a pin fixed on the adjusting sleeve. The pin is slidably fitted with the long hole.

[0010] The beneficial effects of the utility model are as follows: when the power-off manual emergency switch for the electromagnetic reversing valve of the hydraulic station of the utility model is in use, when the power is off, the electromagnetic reversing valve cannot work normally. At this time, the emergency switch of the present application is needed to assist in opening the electromagnetic reversing valve. The socket is inserted into the corresponding position of the electromagnetic reversing valve to make the push shaft of the regulating valve core coaxial with the ejector pin. The regulating sleeve is driven to rotate by turning the regulating hand wheel. Through the cooperation of the internal thread and the external thread, the regulating sleeve can move axially in the direction of the extrusion push spring. The regulating valve core is pushed by the ejector spring to move in the direction of the extrusion ejector pin. The ejector pin can push the reversing valve core of the electromagnetic reversing valve to move, thereby realizing the switching of the valve position. When the valve position is in place, even if the regulating hand wheel is continued to be turned, the ejector spring, as an intermediate force transmission component, can be slowly compressed to absorb a large excess thrust, thereby protecting the ejector pin from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a power-off manual emergency switch for an electromagnetic reversing valve of a hydraulic station of the utility model;

[0012] Figure 2 for Figure 1 Stereoscopic image after sectioning;

[0013] Figure 3 It is a cutaway perspective view of the power-off manual emergency switch in use;

[0014] Figure 4 This is a cross-sectional view of the power-off manual emergency switch when in use;

[0015] In the figure: 1- electromagnetic reversing valve, 11- reversing valve core, 12- electromagnet coil, 13- ejector pin, 2- power-off manual emergency switch, 21- housing, 211- inner cavity, 212- socket, 213- internal thread, 22- adjusting sleeve, 221- blind hole, 23- adjusting hand wheel, 24- adjusting valve core, 241- guide part, 242- limit shaft, 243- ejector shaft, 244- long hole, 25- ejector spring, 26- pin. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0018] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0019] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0020] An embodiment of a power-off manual emergency switch for an electromagnetic directional valve of a hydraulic station of the present invention: As Figure 1-2 shown, the power-off manual emergency switch 2 for the electromagnetic directional valve 1 of the hydraulic station includes a housing 21, an adjusting mechanism and an adjusting valve core 24. Among them, the housing 21 is generally cylindrical or regular polygonal, having a cylindrical inner cavity 211. The inner cavity 211 includes a large-diameter section and a small-diameter section with different diameters. One end of the large-diameter section has a socket 212 for plugging and mating with the electromagnetic directional valve 1, and one end of the small-diameter section is provided with a section of internal thread 213.

[0021] The adjusting mechanism includes an adjusting sliding sleeve 22 and an adjusting handwheel 23. The outer peripheral surface of the adjusting sliding sleeve 22 is provided with an external thread for mating with the internal thread 213. The adjusting handwheel 23 is located at the outer end of the adjusting sliding sleeve 22. The adjusting handwheel 23 and the adjusting sliding sleeve 22 can be threadedly connected or fixedly welded. When the adjusting handwheel 23 is rotated, the adjusting sliding sleeve 22 can be driven to rotate. Due to the thread fit, the axial movement of the adjusting handwheel 23 can be realized. By rotating the adjusting handwheel 23, the length of the adjusting sliding sleeve 22 extending into the inner cavity 211 can be changed. A blind hole 221 is provided at the inner end of the adjusting sliding sleeve 22.

[0022] The regulating valve core 24 includes a guiding portion 241 that is guidingly and slidably fitted with the inner wall of the inner cavity 211. The guiding portion 241 can be disc-shaped or composed of a plurality of bosses with the same length and evenly distributed circumferentially. A limiting shaft 242 is provided on one side of the guiding portion 241, and a pushing shaft 243 is provided on the other side. The guiding portion 241, the limiting shaft 242, and the pushing shaft 243 are coaxially arranged. The limiting shaft 242 moves within the blind hole 221, and the pushing shaft 243 is used to extend from the socket 212 into the electromagnetic reversing valve 1 to push the push pin 13. A pushing spring 25 is sleeved on the limiting shaft 242. One end of the pushing spring 25 is in abutting cooperation with the regulating sliding sleeve 22, and the other end is in pushing cooperation with the regulating valve core 24. The pushing spring 25 is sleeved on the limiting shaft 242. One end of the pushing spring 25 abuts on the guiding portion 241, and the other end abuts on the stepped surface left by the side wall of the blind hole 221.

[0023] A limiting structure is provided between the limiting shaft 242 and the regulating sliding sleeve 22 for limiting the limiting shaft 242 to displace the limiting shaft 242 within a set range. The limiting structure includes a long hole 244 provided on the limiting shaft 242. The length of the long hole 244 extends along the axial direction of the limiting shaft 242, and further includes a pin 26 fixed on the regulating sliding sleeve 22. The pin 26 is slidably fitted with the long hole 244.

[0024] When the electromagnetic reversing valve 1 for a hydraulic station of the present utility model uses the power-off manual emergency switch 2, when power is off, the electromagnetic reversing valve 1 cannot work normally. At this time, it is necessary to use the emergency switch of the present application to assist in opening the electromagnetic reversing valve 1. By inserting the socket 212 at the corresponding position of the electromagnetic reversing valve 1, the pushing shaft 243 of the regulating valve core 24 is coaxially aligned with the push pin 13. By screwing the adjusting handwheel 23 to drive the regulating sliding sleeve 22 to rotate, through the cooperation of the internal thread 213 and the external thread, the regulating sliding sleeve 22 can move axially in the direction of squeezing the pushing spring 25. The pushing spring 25 is used to push the regulating valve core 24 to move in the direction of squeezing the push pin 13. The push pin 13 can then push the reversing valve core 11 of the electromagnetic reversing valve 1 to move, realizing the switching of the valve position. When the valve position is in place, even if the adjusting handwheel 23 is continuously screwed, since the pushing spring 25 serves as an intermediate force-transmitting component, it can be slowly compressed to absorb a large amount of excess thrust, protecting the push pin 13 from damage.

[0025] The above is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model is subject to the claims. All equivalent structural changes made by using the description and drawings of the present utility model should, by the same token, be included in the protection scope of the present utility model.

Claims

1. An electromagnetic reversing valve power-off manual emergency switch for a hydraulic station, characterized in that, Comprising: A housing having an inner cavity, one end of the inner cavity having a socket for plugging and mating with an electromagnetic directional control valve, and the other end of the inner cavity being provided with a section of internal thread; An adjusting mechanism including an adjusting sliding sleeve and an adjusting handwheel. The outer peripheral surface of the adjusting sliding sleeve is provided with an external thread for mating with the internal thread. The adjusting handwheel is located at the outer end of the adjusting sliding sleeve. By rotating the adjusting handwheel, the length of the adjusting sliding sleeve extending into the inner cavity is changed. A blind hole is provided at the inner end of the adjusting sliding sleeve; A regulating valve core including a guiding portion that is guidingly and slidably fitted with the inner wall of the inner cavity. A limiting shaft is provided on one side of the guiding portion, and a pushing shaft is provided on the other side. The limiting shaft moves within the blind hole, and the pushing shaft is used to extend from the socket into the electromagnetic directional control valve to push a push pin. A pushing spring is sleeved on the limiting shaft, and one end of the pushing spring is in abutting cooperation with the adjusting sliding sleeve, and the other end is in pushing cooperation with the regulating valve core.

2. The power-off manual emergency switch for the electromagnetic reversing valve of a hydraulic station according to claim 1, characterized in that, A limiting structure is provided between the limiting shaft and the adjusting sliding sleeve for limiting the limiting shaft to displace the limiting shaft within a set range.

3. The power-off manual emergency switch for the electromagnetic reversing valve of a hydraulic station according to claim 2, characterized in that, The limiting structure includes a long hole provided on the limiting shaft, the length of the long hole extending along the axial direction of the limiting shaft, and further includes a pin fixed on the adjusting sliding sleeve, and the pin is slidably fitted with the long hole.

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