CN218177328U

CN218177328U - Dual-fuel change-over switch

Info

Publication number: CN218177328U
Application number: CN202222246904.5U
Authority: CN
Inventors: 廖渝; 蒋勇; 胡先锋; 丁小兵; 丁河明
Original assignee: Chongqing Shineray Agricultural Machinery Co Ltd
Current assignee: Chongqing Shineray Agricultural Machinery Co Ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-30
Anticipated expiration: 2032-08-25

Abstract

The utility model discloses a dual-fuel transfer switch, which comprises a switch body with an oil inlet, an oil outlet, an air inlet and an air outlet, wherein a core shaft is sleeved in the switch body; an air duct communicating hole and an oil duct communicating hole are arranged in the mandrel; the gas pipeline is communicated, the oil inlet hole, the oil passage communicating hole and the oil outlet hole are arranged in a staggered mode, and the gasoline pipeline is disconnected; when the mandrel is rotated clockwise or anticlockwise, the oil inlet hole, the oil passage communicating hole and the oil outlet hole correspond to each other in pairs, the gasoline pipeline is communicated, the gas inlet hole, the gas outlet hole and the oil passage communicating hole are arranged in a staggered mode, and the gas pipeline is disconnected.

Description

Dual-fuel change-over switch

Technical Field

The utility model relates to an engine fuel switch field, concretely relates to dual fuel change over switch.

Background

At present, the engine has two fuels of gasoline and fuel oil, and when the type of the required fuel needs to be changed in the using process of an oil-gas engine, the oil-gas switching operation needs to be carried out. Two independent fuel supply paths exist in the engine, wherein one path is a gasoline pipeline which starts from an oil tank and is finally communicated with an engine combustion chamber through a carburetor, and the other path is a liquefied gas pipeline which is finally communicated with the engine combustion chamber through a liquefied gas tank, a pressure reducing valve and the carburetor. In order to prevent the two fuel lines from being communicated simultaneously when the two fuel lines are switched, a dual-fuel switch is required to be used for switching the fuel lines. For example, the chinese patent with application number 2015100956429 discloses a dual-fuel transfer switch, which comprises a valve body and a valve rod, wherein the valve rod is fixedly connected with two transfer plates, the opposite side surfaces of the two transfer plates are respectively provided with a connecting groove, when the connecting groove on one transfer plate is respectively communicated with an oil inlet and an oil outlet, the connecting groove on the other transfer plate is disconnected with an air inlet or an air outlet; when the joining groove on one switching plate is respectively communicated with the air inlet hole and the air outlet hole, the joining groove on the other switching plate is disconnected with the oil inlet hole or the oil outlet hole.

Although the dual-fuel change-over switch can realize the switching of fuel pipelines, the change-over plate is fixedly arranged on both sides of the valve rod, and the switching of different fuel pipelines is realized by rotating the valve rod or the change-over plate. Oil inlet, oil outlet, inlet port and venthole in this switch all are L shape, and the structure setting is comparatively complicated, and whole cost is high.

Disclosure of Invention

The above-mentioned not enough to prior art exists, the utility model aims to provide a dual fuel change over switch solves the problem that current dual fuel switch structure is complicated, the cost is high.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a dual-fuel change-over switch comprises a switch body with an oil inlet hole, an oil outlet hole, an air inlet hole and an air outlet hole, wherein a core shaft is sleeved in the switch body; an air duct communicating hole and an oil duct communicating hole are arranged in the mandrel; the gas pipeline is communicated, the oil inlet hole, the oil passage communicating hole and the oil outlet hole are arranged in a staggered mode, and the gasoline pipeline is disconnected; when the mandrel is rotated clockwise or anticlockwise, the oil inlet hole, the oil passage communicating hole and the oil outlet hole correspond to each other in pairs, the gasoline pipeline is communicated, the gas inlet hole, the gas outlet hole and the oil passage communicating hole are arranged in a staggered mode, and the gas pipeline is disconnected. Therefore, the air passage communicating hole and the oil passage communicating hole are arranged on the mandrel, the air passage communicating hole can be communicated with the air inlet hole and the air outlet hole by directly rotating the mandrel, or the oil passage communicating hole can be communicated with the oil inlet hole and the oil outlet hole, and the gas pipeline or the gasoline pipeline can be communicated or disconnected after the mandrel is rotated in different directions. Simultaneously, because air flue intercommunicating pore and oil duct intercommunicating pore interval set up at the dabber, do not communicate between the two to behind the rotatory dabber, can realize the intercommunication of different pipelines, avoid two pipelines to communicate simultaneously, effectively ensure the effective switching of two pipelines. In addition, the air passage communicating hole and the oil passage communicating hole are directly arranged on the mandrel, so that the structure of the change-over switch is effectively simplified, the internal parts of the change-over switch are few, and the manufacturing cost is low.

Furthermore, the air flue communication hole is positioned in the middle of the mandrel and is circular, and the central axes of the air inlet hole and the air outlet hole are overlapped and are positioned at the same horizontal height. Like this, inlet port and venthole set up highly unanimous, and the axis overlap the back, the air flue intercommunicating pore only need be a circular through-hole can, after the gas pipeline UNICOM, inlet port, air flue intercommunicating pore, venthole axis overlap, are in a straight line, and whole pipeline is a straight line, and inside air flue intercommunicating pore sets up simply.

Further, oil inlet, oil outlet mutually perpendicular set up, the oil duct intercommunicating pore is L shape, comprises first intercommunicating pore and second intercommunicating pore, first intercommunicating pore is used for being linked together with the oil inlet, the second intercommunicating pore is used for being linked together with the oil outlet. Therefore, after the oil inlet hole, the oil duct communicating hole and the oil outlet hole are communicated, the whole gasoline pipeline is L-shaped.

Furthermore, the oil outlet is located at the front end of the switch body, and the second communication hole and the oil outlet are overlapped with the axis line of the switch body. Like this, oil outlet and inlet port are perpendicular setting, and overall layout is compact.

Furthermore, the mandrel is divided into a front section, a middle section and a rear section, a gasoline sealing sleeve is sleeved at the front end of the mandrel, a gasoline passing hole communicated with the oil duct communicating hole is formed in the gasoline sealing sleeve, and the outer wall of the gasoline sealing sleeve abuts against the inner wall of the switch body. Therefore, the gasoline sealing sleeve can effectively ensure the sealing of the gasoline pipeline, prevent gasoline from overflowing and ensure that the gasoline pipeline has better sealing property.

Furthermore, a gas sealing sleeve is sleeved at the middle part of the mandrel, and two gas passing holes respectively corresponding to the two ends of the air passage communication hole are formed in the gas sealing sleeve. Like this, the gas seal cover can effectively ensure that the gas pipeline has good leakproofness, prevents that the gas is excessive.

Furthermore, an annular groove is arranged in the middle of the mandrel and between the gas sealing sleeve and the gasoline sealing sleeve, a sealing ring is sleeved in the annular groove, and the gas sealing sleeve, the gasoline sealing sleeve and the sealing ring are all made of rubber. Therefore, the sealing ring can further isolate the gas pipeline and the gasoline pipeline, so that the sealing performance between the two pipelines is good.

Furthermore, a mandrel pressing plate is sleeved at the rear end of the mandrel, and the mandrel pressing plate is detachably connected with the switch body to seal the side end of the switch body. Thus, the mandrel press plate can be used to mount the mandrel and form a sealed cavity with the switch body within the switch body.

Furthermore, a switch handle can be detachably arranged at the rear end of the mandrel, and a through hole matched with the rear end of the mandrel is formed in the middle of the mandrel pressing plate; the perforation is composed of a circular hole and a fan-shaped hole communicated with the circular hole, a raised limiting rib is arranged on the mandrel and at the position corresponding to the mandrel pressing plate, the limiting rib is arranged in the fan-shaped hole, and when the mandrel rotates along with the switch handle, the limiting rib rotates to the end position of the fan-shaped hole, pipeline conversion is realized. Therefore, the rotation angle of the mandrel can be limited by the fan-shaped hole, so that the rotation angles of the upper air passage communication hole and the oil passage communication hole of the mandrel are limited, and after the upper air passage communication hole and the oil passage communication hole rotate to a specified angle, the pipeline communication can be realized, and the purpose of pipeline conversion is achieved.

Furthermore, a spring is arranged in the switch body, a steel ball is arranged below the spring, three arc-shaped grooves are arranged at intervals in the middle of the mandrel, and when the switch handle rotates to a vertical position and is communicated with a gas pipeline or a gasoline pipeline, the steel ball is clamped in one of the corresponding arc-shaped grooves to give a position conversion prompt sound; when the switch handle rotates to other positions, the steel ball is jacked up by the mandrel, and the spring is compressed. Like this, after one of them pipeline intercommunication, the steel ball is gone into in the arc recess from other positions cards, sends the prompt tone, and the suggestion dabber is rotatory to the position. Meanwhile, when the rotary pipe is rotated to the middle position of the two pipelines, the two pipelines are disconnected, and corresponding prompt tones are also sent out. The rotation angle of the mandrel can be conveniently determined by an operator according to the prompt tone.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the air flue communicating hole and the oil duct communicating hole are arranged on the mandrel at intervals and are not communicated with each other, so that the communicating of different pipelines can be realized after the mandrel is rotated, the two pipelines are prevented from being communicated simultaneously, and the effective switching of the two pipelines is effectively ensured.

2. The air passage communicating hole and the oil passage communicating hole are directly arranged on the mandrel, so that the structure of the change-over switch is effectively simplified, the number of internal parts of the change-over switch is small, and the manufacturing cost is low.

Drawings

FIG. 1 is a side view of a dual fuel transfer switch in an embodiment;

FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 is a B-B sectional view showing the gas pipeline in the embodiment in a ventilation state after being communicated;

FIG. 4 is a cross-sectional view taken along line D-D of FIG. 1;

FIG. 5 is a sectional view of the gas pipeline D-D in the ventilation state after the gas pipeline is communicated in the embodiment;

FIG. 6 is a schematic cross-sectional view of the gasoline pipeline after the gasoline pipeline is communicated in the embodiment;

FIG. 7 is a schematic diagram of a limiting structure of the mandrel and the mandrel platen in the embodiment;

FIG. 8 is a schematic view of an assembly structure of a spring and a steel ball in the embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance. Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-6, the dual-fuel transfer switch provided in this embodiment includes a switch body 1 having an oil inlet 11, an oil outlet 12, an air inlet 13 and an air outlet 14, wherein a core shaft 2 is sleeved in the switch body 1; an oil channel communication hole 21 and an oil channel communication hole 22 are arranged in the mandrel 2; the gas channel communication hole 21 and the oil channel communication hole 22 are arranged on the mandrel 2 at intervals in the front-back direction, the gas inlet hole 13 and the gas outlet hole 14 are respectively positioned at the left side and the right side of the switch body 1, when the mandrel 2 is rotated anticlockwise or clockwise, the gas inlet hole 13, the gas outlet hole 14 and the gas channel communication hole 21 correspond to each other in pairs, a gas pipeline is communicated, the oil inlet hole 11, the oil channel communication hole 22 and the oil outlet hole 12 are arranged in a staggered mode, and a gasoline pipeline is disconnected; when the mandrel 2 is rotated clockwise or anticlockwise, the oil inlet hole 11, the oil passage communication hole 22 and the oil outlet hole 12 correspond to each other pairwise, the gasoline pipeline is communicated, the air inlet hole 13, the air outlet hole 14 and the gas passage communication hole 21 are arranged in a staggered mode, and the gas pipeline is disconnected.

The air flue communication hole 21 in the embodiment is located in the middle of the mandrel 2 and is circular, the air flue communication hole 21 is radially arranged in the mandrel, when the gas pipeline is communicated, the axis of the air flue communication hole 21 is perpendicular to the axis of the mandrel, and the axes of the air inlet hole 13 and the air outlet hole 14 are overlapped and are located at the same horizontal height.

As shown in fig. 1 and 6, the oil inlet hole 11 and the oil outlet hole 12 are perpendicular to each other, and the oil passage communication hole 22 is L-shaped and is composed of a first communication hole for communicating with the oil inlet hole 11 and a second communication hole for communicating with the oil outlet hole 12. The oil outlet 12 is located at the front end of the switch body 1, and the second communication hole and the oil outlet 12 are overlapped with the axial lead of the switch body 2. The second communication hole is overlapped with the axial lead of the oil outlet, and when the gasoline pipeline is communicated, the first communication hole is communicated with the oil inlet.

In order to ensure the sealing performance of the gas pipeline and the gasoline pipeline and prevent the gas pipeline and the gasoline pipeline from leaking, triple sealing is adopted in the gas pipeline and the gasoline pipeline. Specifically, the mandrel 2 is divided into a front section, a middle section and a rear section, a gasoline sealing sleeve 3 is sleeved at the front end of the mandrel 2, an oil passing hole 31 communicated with the oil passage communicating hole 22 is formed in the gasoline sealing sleeve 3, and the outer wall of the gasoline sealing sleeve 3 abuts against the inner wall of the switch body 1. The middle part of the mandrel 2 is sleeved with a gas sealing sleeve 4, and the gas sealing sleeve 4 is provided with two air passing holes 41 which respectively correspond to the two ends of the air passage communicating hole 21. An annular groove is arranged in the middle of the mandrel 2 and between the gas sealing sleeve 4 and the gasoline sealing sleeve 3, a sealing ring 5 is sleeved in the annular groove, and the gas sealing sleeve 4, the gasoline sealing sleeve 3 and the sealing ring 5 are all made of rubber.

The rear end of the mandrel 2 is further sleeved with a mandrel pressing plate 6, and the mandrel pressing plate 6 is detachably connected with the switch body 1 to seal the side end of the switch body 1. Specifically, be equipped with the annular mounting panel of an evagination at switch body 1 rear end, be equipped with the screw hole on the annular mounting panel, be equipped with two mounting holes with screw hole one-to-one in the dabber clamp plate 6 left and right sides, through bolt and screw hole screw-thread fit back fixed connection between switch body and the dabber clamp plate. This assembly method, fastening and sealing performance are good, and are convenient for install and dismantle.

As shown in fig. 7, a switch handle 7 is detachably mounted at the rear end of the mandrel 2, and a through hole 61 matched with the rear end of the mandrel 2 is formed in the middle of the mandrel pressing plate 6; the through hole 61 is composed of a circular hole and a fan-shaped hole communicated with the circular hole, a convex limiting rib is arranged on the mandrel 2 and corresponds to the mandrel pressing plate 6, the limiting rib is arranged in the fan-shaped hole, and when the mandrel rotates along with the switch handle, the limiting rib rotates to the end position of the fan-shaped hole, pipeline conversion is achieved. Specifically, the radian of the fan-shaped hole in the embodiment is 120 degrees, when the switch handle 7 is positioned in the middle of the fan-shaped hole and is vertical, the gas pipeline and the gasoline pipeline are both in a disconnected state, and when the switch handle rotates to the leftmost side of the fan-shaped hole towards the left side (anticlockwise) until the switch handle cannot rotate, the gas pipeline is communicated, and the gasoline pipeline is disconnected; when the switch handle rotates to the rightmost side of the fan-shaped hole towards the right side (clockwise) until the switch handle cannot rotate, the gasoline pipeline is communicated, and the gas pipeline is disconnected.

As shown in fig. 8, a spring 8 is further arranged in the switch body 1, a steel ball 9 is arranged below the spring 8, three arc-shaped grooves are arranged at intervals in the middle of the mandrel 2, and when the switch handle rotates to a vertical position and is communicated with a gas pipeline or a gasoline pipeline, the steel ball is clamped in one of the corresponding arc-shaped grooves to give a position conversion prompt sound; when the switch handle is rotated to other positions, the steel ball is jacked up by the mandrel and compresses the spring.

In order to facilitate the installation of the dual-fuel change-over switch on the engine, a switch supporting plate 10 is further arranged on the mandrel and between the switch handle and the mandrel pressing plate, the switch supporting plate is sleeved on the mandrel, and the upper end and the left side and the right side of the switch supporting plate are respectively provided with a fixing hole. When the dual-fuel change-over switch is installed, the connecting piece penetrates through each fixing hole and is matched with the installation hole of the corresponding component on the engine, and then the dual-fuel change-over switch can be installed on the engine.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions.

Claims

1. A dual-fuel change-over switch comprises a switch body with an oil inlet hole, an oil outlet hole, an air inlet hole and an air outlet hole, wherein a core shaft is sleeved in the switch body; an air duct communicating hole and an oil duct communicating hole are arranged in the mandrel; the gas pipeline is communicated, the oil inlet hole, the oil passage communicating hole and the oil outlet hole are arranged in a staggered mode, and the gasoline pipeline is disconnected; when the mandrel is rotated clockwise or anticlockwise, the oil inlet hole, the oil passage communicating hole and the oil outlet hole correspond to each other in pairs, the gasoline pipeline is communicated, the air inlet hole, the air outlet hole and the oil passage communicating hole are arranged in a staggered mode, and the gas pipeline is disconnected.

2. The dual fuel transfer switch of claim 1, wherein the air passage communication hole is located in the middle of the mandrel and is circular, and the central axes of the air inlet hole and the air outlet hole are overlapped and are located at the same horizontal level.

3. The dual fuel transfer switch of claim 1 or 2, wherein the oil inlet and the oil outlet are arranged perpendicular to each other, the oil passage communication hole is L-shaped and is composed of a first communication hole and a second communication hole, the first communication hole is used for communicating with the oil inlet, and the second communication hole is used for communicating with the oil outlet.

4. The dual fuel transfer switch of claim 3, wherein the oil outlet is located at the front end of the switch body, and the second communication hole and the oil outlet are overlapped with the axial lead of the switch body.

5. The dual-fuel change-over switch according to claim 1, 2 or 4, characterized in that the mandrel is divided into a front section, a middle section and a rear section, a gasoline sealing sleeve is sleeved on the front end of the mandrel, an oil passing hole communicated with the oil passage communication hole is arranged on the gasoline sealing sleeve, and the outer wall of the gasoline sealing sleeve is tightly matched with the inner wall of the switch body.

6. The dual-fuel change-over switch according to claim 5, characterized in that a gas sealing sleeve is sleeved on the middle part of the mandrel, and two gas passing holes corresponding to two ends of the air passage communicating hole are respectively arranged on the gas sealing sleeve.

7. The dual-fuel change-over switch according to claim 6, characterized in that an annular groove is arranged in the middle of the mandrel and between the gas sealing sleeve and the gasoline sealing sleeve, a sealing ring is sleeved in the annular groove, and the gas sealing sleeve, the gasoline sealing sleeve and the sealing ring are all made of rubber.

8. The dual fuel transfer switch of claim 1, 2, 4, 6 or 7, wherein a mandrel pressure plate is further sleeved at the rear end of the mandrel, and the mandrel pressure plate is detachably connected with the switch body to seal the side end of the switch body.

9. The dual-fuel change-over switch according to claim 8, wherein a switch handle is detachably mounted at the rear end of the mandrel, and a through hole matched with the rear end of the mandrel is formed in the middle of the mandrel pressing plate; the perforation is composed of a circular hole and a fan-shaped hole communicated with the circular hole, a raised limiting rib is arranged on the mandrel and at the position corresponding to the mandrel pressing plate, the limiting rib is arranged in the fan-shaped hole, and when the mandrel rotates along with the switch handle, the limiting rib rotates to the end position of the fan-shaped hole, pipeline conversion is realized.

10. The dual-fuel change-over switch according to claim 8, wherein a spring is further arranged in the switch body, a steel ball is arranged below the spring, three arc-shaped grooves are arranged at intervals in the middle of the mandrel, and when the switch handle is rotated to a vertical position and the gas pipeline or the gasoline pipeline is communicated, the steel ball is clamped in one of the corresponding arc-shaped grooves to give a switching position prompt sound; when the switch handle rotates to other positions, the steel ball is jacked up by the mandrel, and the spring is compressed.