A switching mechanism

Abstract

The present invention discloses a reversing mechanism, comprising a first part and a second part, wherein valve cores are arranged inside the first part and the second part, a fluid inlet hole is arranged on the central axis of the valve core, and a first channel and a second channel are arranged inside the first part, and the fluid inlet hole is connected with the first channel and the second channel by movement of the valve core, thereby realizing the reversing function of the device, and since a guide column is arranged inside the second part and cooperates with a guide groove on the valve core, the fluid inlet hole can be switched back and forth between the two channels, and positioning can be achieved after the switching, thereby ensuring that the fluid inlet hole and the switched channel always remain unobstructed, so the device only needs to pull the valve core to realize the fluid path conversion, which greatly simplifies the existing fluid path conversion method; therefore, the present invention is not only simple in structure and easy to manufacture, but also easy to use and reliable in performance, thereby realizing promotion and application.

Description

Technical Field

[0001] The invention relates to the technical field of fluid control, in particular to a fluid reversing mechanism. Background Art

[0002] Manual reversing valve is a reversing valve that uses a manual lever to control the valve core to change position. Most of them are spring automatic reset structures. In the spring reset method, when the external force on the pull rod is cancelled, the valve core automatically resets due to the thrust of the spring and cannot be fixed at a specific stroke position. Summary of the invention

[0003] The object of the present invention is to provide a reversing mechanism to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reversing mechanism, comprising a first part and a second part movably connected to the first part; a cavity is provided on the central axis of the first part and the second part, and a valve core is provided in the cavity; a first channel and a second channel connected to the cavity are opened at one end of the first part away from the second part; a fluid outlet hole for introducing fluid into the first channel or the second channel is provided at one end of the valve core; a raised guide column is provided in the cavity of the second part, and the guide column is slidably matched with a guide groove provided on the valve core; a spring is also provided on the valve core, wherein the spring is used to keep the valve core in a downward state at all times.

[0005] As a preferred technical solution of the present invention: the valve core includes an upper valve stem, a middle valve stem and a lower valve stem that are integrally manufactured, wherein the guide groove is located on the upper valve stem, the fluid outlet is located on the lower valve stem, and the spring is located on the middle valve stem.

[0006] As a preferred technical solution of the present invention: a fluid inlet hole connected to the fluid outlet hole is also provided on the central axis of the valve core.

[0007] As a preferred technical solution of the present invention: a sealing groove is provided on the circumferential surface of the lower valve stem, a sealing ring is installed in the sealing groove, and an internal threaded hole is also provided at one end of the fluid inlet hole away from the fluid outlet hole.

[0008] As a preferred technical solution of the present invention: two annular grooves are further provided inside the first part, and are respectively connected to the first channel and the second channel.

[0009] As a preferred technical solution of the present invention: the first part is threadedly connected to the second part, and a connecting cover is provided at one end of the second part away from the first part.

[0010] As a preferred technical solution of the present invention: the guide grooves are arranged end to end on the circumferential surface of the upper valve stem.

[0011] As a preferred technical solution of the present invention: the guide groove includes an upper dead point and a lower dead point, and the upper dead point and the lower dead point are arranged alternately.

[0012] As a preferred technical solution of the present invention: the upper dead point is used to keep the fluid outlet hole in communication with the first channel, and the lower dead point is used to keep the fluid outlet hole in communication with the second channel.

[0013] As a preferred technical solution of the present invention: a flat groove for quickly installing the second part onto the first part is provided on the outer circumferential surface of the second part.

[0014] By adopting the above technical scheme, the beneficial effect of the present invention is: through the movement of the valve core, the fluid inlet hole is connected with the first channel and the second channel, thereby realizing the reversing function of the device; since the guide column is provided inside the second part and cooperates with the guide groove on the valve core, the fluid inlet hole can be switched back and forth between the two channels, and positioning can be achieved after the conversion, thereby ensuring that the fluid inlet hole and the converted channel always remain unobstructed; therefore, the device only needs to push and pull the valve core to realize the fluid path conversion, which greatly simplifies the existing fluid path conversion method. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the connection between the first part and the second part of the present invention;

[0017] Figure 3 It is a schematic diagram of the main structure of the valve core of the present invention;

[0018] Figure 4 It is a schematic diagram of the structure of the guide groove after it is unfolded.

[0019] In the figure: 1, first part; 2, second part; 3, connecting cover; 4, spring; 5, valve core; 50, internal threaded hole; 51, fluid inlet hole; 52, fluid outlet hole; 53, sealing ring; 54, guide groove; 55, sealing groove; 56, middle valve stem; 57, lower valve stem; 58, upper valve stem; 59, top dead center; 510, bottom dead center; 6, guide column; 7, flat groove; 8, first channel; 9, second channel; 10, cavity; 11, ring groove. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and cannot be understood as limiting the present invention. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] See also Figure 1-4 The present invention provides an embodiment: a reversing mechanism, comprising a first part 1 and a second part 2 movably connected to the first part 1; a cavity 10 is provided on the central axis of the first part 1 and the second part 2, and a valve core 5 is provided in the cavity 10; a first channel 8 and a second channel 9 connected to the cavity 10 are opened at one end of the first part 1 away from the second part 2; a fluid inlet hole 51 is provided on the central axis of the valve core 5, and a fluid outlet hole 52 for introducing fluid into the first channel 8 or the second channel 9 is provided at one end of the valve core 5; a protruding guide column 6 is provided in the cavity 10 of the second part 2, and the guide column 6 is slidably matched with a guide groove 54 provided on the valve core 5.

[0022] By moving the valve core 5, the fluid outlet hole 52 is connected to the first channel 8 and the second channel 9, thereby realizing the reversing function of the device. Since the guide column 6 is provided inside the second part 2 and cooperates with the guide groove 54 on the valve core 5, the fluid outlet hole 52 can be switched back and forth between the two channels, and positioning can be achieved after the conversion, thereby ensuring that the fluid outlet hole 52 and the converted channel are always kept in a smooth state. Therefore, the device only needs to push and pull the valve core 5 to realize the fluid path conversion, which greatly simplifies the existing fluid path conversion method.

[0023] In order to further realize the simplified fluid conversion method of the device, the valve core 5 includes an upper valve stem 58, a middle valve stem 56 and a lower valve stem 57 which are integrally made, wherein the guide groove 54 is located on the upper valve stem 58, the fluid outlet hole 52 is located on the lower valve stem 57, and the middle valve stem 56 is used to fit the spring 4. In addition, the device is provided with a spring 4, so that the guide column 6 and the guide groove 54 can be further tightened after relative sliding, thereby ensuring that the fluid outlet hole 52 is always connected to one of the channels. When the valve core 5 is pulled, the valve core 5 is released at this time, and the valve core 5 can be driven downward under the action of the spring 4, thereby eliminating the step of manually pushing the valve core 5 downward, thereby further simplifying the operating steps of the device. In addition, after the spring 4 is reset, the valve core 5 can be firmly fixed, thereby ensuring that the fluid outlet hole 52 is always connected to a certain channel for a long time.

[0024] Among them, a sealing groove 55 is provided on the circumferential surface of the lower valve stem 57, and a sealing ring 53 is installed in the sealing groove 55, and an internal threaded hole 50 is also provided at one end of the fluid inlet hole 51 away from the fluid outlet hole 52. Due to the provision of the internal threaded hole 50, the fluid inlet hole 51 of the device can be quickly connected to the external fluid source, and the connection can be kept tight, thus solving the problem that the pipeline of the fluid source will not fall off when the valve core 5 or the pipeline of the fluid source is pushed and pulled during the switching of the device. In addition, the sealing ring 53 can be installed in the sealing groove 55, thereby ensuring that the airflow inside the channel will not interfere with each other during, during and after the channel switching, thereby solving the problem of switching failure, switching delay or switching jam of the device;

[0025] In order to further solve the problem of failure, delay or jamming of the fluid source changing direction between the channel and the fluid outlet hole 52 when the valve core 5 moves, two annular grooves 11 are further provided inside the first part 1, and are respectively connected to the first channel 8 and the second channel 9. The annular grooves 11 are used to surround the periphery of the fluid outlet hole 52, so that the fluid source flows to the first channel 8 or the second channel 9 faster and the flow efficiency is higher.

[0026] The first part 1 is threadedly connected to the second part 2, and a connecting cover 3 is provided at one end of the second part 2 away from the first part 1. The threaded connection is simple in connection, convenient in connection and processing, and easy to disassemble and assemble, that is, convenient for installing or removing the valve core 5. In addition, the connecting cover 3 is provided to prevent fluid leakage at the other end of the valve core 5.

[0027] Among them, the guide groove 54 is connected end to end and is arranged on the circumferential surface of the upper valve stem 58. The guide groove 54 surrounds the upper valve stem 58. Pulling or pulling out the valve core 5 allows the guide column 6 to move along the guide groove 54, so that the device can achieve rapid conversion between different channels by continuously pulling and pulling out the valve core 5, thereby further improving the efficiency of fluid reversing when the device is pulled and pulled, and also provides reliable and powerful support for the smooth reversing of the device and the simplification of the reversing method.

[0028] Since the guide groove 54 includes an upper stop point 59 and a lower stop point 510, the upper stop point 59 and the lower stop point 510 are staggered. Due to the staggered upper stop point 59 and the lower stop point 510, the fluid outlet 52 is restricted by two stop points at a certain moment when the valve core 5 is pulled or extracted. Therefore, when the valve core 5 is pulled or extracted, the guide column 6 is always exchanged between the two stop points. When the pulling stops, the guide column 6 is located in a certain stop point to ensure that the fluid outlet 52 is always connected to one of the two channels. In this way, the device simply and reliably realizes the reversal of the fluid and the continuous connection after the reversal.

[0029] More specifically, the upper dead point 59 is used to keep the fluid outlet hole 52 connected to the first channel 8, and the lower dead point 510 is used to keep the fluid outlet hole 52 connected to the second channel 9. When the guide column 6 is located at the upper dead point 59, the fluid outlet hole 52 is connected to the first channel 8, and when the guide column 6 is located at the lower dead point 510, the fluid outlet hole 52 is connected to the second channel 9.

[0030] In addition, in order to facilitate the installation of the first part 1 and the second part 2 to obtain further connection strength, a flat groove 7 for quickly installing the second part 2 on the first part 1 is provided on the outer circumferential surface of the second part 2. The second part 2 is tightly fixed to the first part 1 by inserting a wrench into the flat groove 7 and then rotating the wrench. At the same time, the device can be installed on other equipment through the connection between the wrench and the flat groove 7. Therefore, the provision of the flat groove 7 makes the connection between the first part 1 and the second part 2 of the device convenient and quick, and the connection strength is stronger, and it is also convenient to install the device as a whole on other equipment.

[0031] Through the above technical solution, the device also solves the problems of low current control safety system of existing electromagnetic reversing valves and electro-hydraulic reversing valves, small thrust of electromagnets, and frequent valve core jamming, which makes the electromagnet unable to push the internal valve body to move.

[0032] The device uses a spring 4 to drive the valve core 5 to move up and down, solving the problem that the existing electromagnetic reversing valve and the electro-hydraulic reversing valve need to be equipped with a manual reversing device and used in conjunction with an emergency switch to reliably complete the reversing process.

[0033] In addition, the device is used in combination with the valve core 5 and the first part 1 and the second part 2. Firstly, it has a simple structure, few components and reliable operation. Secondly, the device is made of aluminum alloy and stainless steel, so it is easy to obtain materials, easy to process materials, and has low material use costs. Thirdly, the device will not generate electric sparks when used, which solves the problem that ordinary electromagnetic reversing valves and electro-hydraulic reversing valves cannot meet the needs of some specific places, such as chemical places, inside mines and other flammable and explosive places.

[0034] Since the device has a simple structure and few parts, the problem of high cost of using explosion-proof solenoid valves is solved.

[0035] The present application can be applied to gas pipelines, such as gas pipelines in chemical plants; it can also be used in liquid pipelines, such as oil discharge pipelines in oil tankers.

[0036] In addition to the above description, the device is also suitable for internal cleaning of some spaces that are inconvenient for people to enter and exit. For example, when using a pneumatic vibrator to clean the inside of a pipeline, gas reversal is required to achieve a change in the path of the vibrator inside the pipeline.

[0037] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A reversing mechanism, characterized in that: The invention comprises a first part (1) and a second part (2) movably connected to the first part (1); a cavity (10) is provided on the central axis of the first part (1) and the second part (2), and a valve core (5) is provided in the cavity (10); A first channel (8) and a second channel (9) connected to the cavity (10) are provided at one end of the first part (1) away from the second part (2); a fluid outlet hole (52) for introducing fluid into the first channel (8) or the second channel (9) is provided at one end of the valve core (5); A protruding guide column (6) is provided in the cavity (10) of the second part (2), and the guide column (6) is slidably matched with a guide groove (54) provided on the valve core (5); a spring (4) is also provided on the valve core (5), wherein the spring (4) is used to keep the valve core (5) always in a downward moving state; The valve core (5) comprises an upper valve stem (58), a middle valve stem (56) and a lower valve stem (57) which are integrally formed; wherein the guide groove (54) is located on the upper valve stem (58), the fluid outlet hole (52) is located on the lower valve stem (57), and the spring (4) is located on the middle valve stem (56); The first part (1) is threadedly connected to the second part (2), and a connecting cover (3) is provided at one end of the second part (2) away from the first part (1).

2. A reversing mechanism according to claim 1, characterized in that: A fluid inlet hole (51) connected to the fluid outlet hole (52) is also provided on the central axis of the valve core (5).

3. A reversing mechanism according to claim 2, characterized in that: A sealing groove (55) is provided on the circumferential surface of the lower valve stem (57), and a sealing ring (53) is installed in the sealing groove (55). An internal threaded hole (50) is also provided at one end of the fluid inlet hole (51) away from the fluid outlet hole (52).

4. A reversing mechanism according to claim 1, 2 or 3, characterized in that: Two annular grooves (11) are also provided inside the first part (1) and are respectively connected to the first channel (8) and the second channel (9).

5. A reversing mechanism according to claim 1, characterized in that: The guide grooves (54) are arranged end to end on the circumferential surface of the upper valve stem (58).

6. A reversing mechanism according to claim 1 or 5, characterized in that: The guide groove (54) comprises an upper dead point (59) and a lower dead point (510), and the upper dead point (59) and the lower dead point (510) are arranged alternately.

7. A reversing mechanism according to claim 6, characterized in that: The upper dead point (59) is used to maintain the fluid outlet hole (52) in communication with the first channel (8), and the lower dead point (510) is used to maintain the fluid outlet hole (52) in communication with the second channel (9).

8. A reversing mechanism according to claim 7, characterized in that: A flat groove (7) is provided on the outer circumferential surface of the second part (2) for quickly installing the second part (2) onto the first part (1).

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