Manual fuel oil change-over valve

Abstract

A manual fuel oil change-over valve comprises a valve body, a valve cover and two sets of valve element assemblies, and the two sets of valve element assemblies are driven by a driving mechanism to move up and down synchronously. The driving mechanism comprises a sliding frame, and the two sides of the sliding frame are connected with the two valve element assemblies to form a whole. The upper part of the central rod is rotatably connected with the valve cover and is vertically limited; the lower part of the central rod freely penetrates through the sliding frame; an upper group of rollers and a lower group of rollers are mounted on the center rod; sliding grooves corresponding to the upper and lower groups of rollers in position are formed in the sliding frame; in the rotating process of the center rod; when the roller at the upper end is positioned at the upper end of the carriage, the roller at the lower end is positioned in the chute; and when the roller at the upper end is positioned in the chute, the roller at the lower end is positioned at the lower end of the carriage. According to the manual fuel oil change-over valve, manual operation is adopted, and the fault rate is lower.

Description

Technical Field

[0001] This utility model relates to the field of switching valves, and in particular to a manual fuel switching valve. Background Technology

[0002] Existing switching valves mostly adopt electric design or manual-electric integrated design, which are complex in structure and high in cost. For example, our company's patent "Emergency Manual Automotive Main and Auxiliary Fuel Tank Switching Valve" with application number "201110392341.4" is a manual-electric integrated design, which adopts planetary gear transmission and circuit control. Planetary gear transmission and electrical control are expensive, complex in structure, and have more failure points, which greatly increases the risk of failure. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a manual fuel switching valve that can be switched by a handle, which is convenient and simple to operate and has a low failure rate.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A manual fuel switching valve includes a valve body, a valve cover, and two sets of valve core assemblies, which are driven to move up and down synchronously by a drive mechanism.

[0006] The drive mechanism includes a slide, with two sets of valve core assemblies connected to both sides of the slide to form a whole; the upper part of the center rod is rotatably connected to the valve cover and limited vertically, while the lower part of the center rod freely passes through the slide; two sets of rollers are installed on the center rod; the slide is provided with grooves corresponding to the positions of the upper and lower sets of rollers; during the rotation of the center rod; when the upper roller is located at the upper end of the slide, the lower roller is located in the groove; when the upper roller is located in the groove, the lower roller is located at the lower end of the slide.

[0007] The slide includes a sleeve with grooves on the top and bottom; connecting plates are fixed on the left and right sides of the sleeve, and each connecting plate is detachably connected to the valve stem of a set of valve core assemblies.

[0008] The slide is V-shaped, with the upper slide opening facing upwards and the lower slide opening facing downwards, and both the upper and lower slides are connected to the outside.

[0009] The groove includes an inclined surface, a concave surface, and a vertical surface. One end of the inclined surface and the vertical surface are in contact with the end face of the sleeve, and the other end of the inclined surface and the vertical surface are in contact with the concave surface. The concave surface and the side wall of the roller remain in contact when in contact.

[0010] The upper rollers are in two sets and are symmetrical from left to right; the lower rollers are in two sets and are symmetrical from left to right; the position and number of the chute correspond to the position and number of the rollers.

[0011] The connecting plate has a through hole, through which the valve stem can freely pass and be limited by a retaining spring.

[0012] The outermost edge of the connecting plate has a sliding opening, which slides in conjunction with a vertical slide rail, which is fixed to the inner wall of the valve cover.

[0013] This utility model provides a manual fuel switching valve, which has the following technical advantages:

[0014] 1) The manual fuel switching valve adopts a mechanical structure, which is simple in structure, has no electronic components, reduces the number of failure points, is easy to maintain, and has high overall reliability.

[0015] 2) The manual structure is operated directly by the handle, which is convenient and simple to operate, suitable for use in various environmental conditions, and has strong durability under harsh working conditions.

[0016] 3) The manual fuel switching valve adopts a mechanical structure with fewer parts, reducing the electrical control components and significantly lowering costs.

[0017] 4) Compared with the patent "Emergency Manual Automotive Main and Auxiliary Fuel Tank Switching Valve" with application number "201110392341.4", this device has no electrical control and only realizes the switching of main and auxiliary fuel tanks through mechanical transmission. It has a simple structure, low cost, high reliability, few failure points, and is reliable and durable. It is suitable for harsh working environments and cost-saving economic vehicles. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention (first perspective).

[0020] Figure 2 This is a schematic diagram of the external structure of the present invention (second perspective).

[0021] Figure 3 for Figure 1 A longitudinal sectional view.

[0022] Figure 4 This is a schematic diagram of the valve core assembly in this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the central rod in this utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the carriage in this utility model.

[0025] Figure 7 This is a schematic diagram showing the connection between the slide and the center rod in this utility model.

[0026] In the diagram: Valve body 1, Valve cover 2, Main oil tank supply port 3, Main oil tank return port 4, Auxiliary oil tank supply port 5, Auxiliary oil tank return port 6, Engine inlet port 7, Engine return port 8, First intermediate chamber 9, Second intermediate chamber 10, First upper chamber 11, First lower chamber 12, Second upper chamber 13, Second lower chamber 14, Slide 15, Valve stem 16, Center rod 17, Roller 18, Slide groove 19, Handle 20, Valve core assembly 21, Sleeve 15.1, Connecting plate 15.2, Through hole 15.3, Snap ring 15.4, Sliding port 15.5. Detailed Implementation

[0027] like Figure 1-2 As shown, a manual fuel selector valve includes a valve body 1 and a valve cover 2. A main fuel tank supply port 3 and a main fuel tank return port 4 are located on the upper side of one side of the valve body 1, and a secondary fuel tank supply port 5 and a secondary fuel tank return port 6 are located on the lower side of one side of the valve body 1. An engine fuel inlet port 7 and an engine fuel return port 8 are located in the middle of the other side of the valve body 1. A first intermediate cavity 9 and a second intermediate cavity 10 are provided inside the valve body 1. One side of the first intermediate cavity 9 is connected to the engine fuel inlet port 7, and one side of the second intermediate cavity 10 is connected to the engine fuel return port 8.

[0028] The upper end of the first intermediate cavity 9 is connected to the first upper cavity 11, and the lower end is connected to the first lower cavity 12.

[0029] The first upper chamber 11 is connected to the main fuel tank supply interface 3, and the first lower chamber 12 is connected to the auxiliary fuel tank supply interface 5.

[0030] The upper end of the second intermediate cavity 10 is connected to the second upper cavity 13, and the lower end is connected to the second lower cavity 14.

[0031] The second upper chamber 13 is connected to the main oil tank return port 4, and the second lower chamber 14 is connected to the auxiliary oil tank return port 6.

[0032] A valve core assembly 21 is provided in the first intermediate cavity 9 and the second intermediate cavity 10 respectively. The valve core assembly 21 adopts the existing structure, and the two valve core assemblies 21 can move up and down synchronously by being driven by a drive mechanism.

[0033] When the two valve core assemblies 21 move downwards into place, the lower ends of the first intermediate chamber 9 and the second intermediate chamber 10 are sealed. This disconnects the first lower chamber 12 from the first intermediate chamber 9 and the second lower chamber 14 from the second intermediate chamber 10; while the first upper chamber 11 connects to the first intermediate chamber 9 and the second upper chamber 13 connects to the second intermediate chamber 10. At this time, the main fuel tank supply port 3, the first upper chamber 11, the first intermediate chamber 9, and the engine fuel inlet port 7 are connected, realizing the main fuel tank fuel supply; the main fuel tank return port 4, the second upper chamber 13, the second intermediate chamber 10, and the engine return port 8 are connected, realizing the main fuel tank return.

[0034] When the two valve core assemblies move upwards into position, the upper ends of the first intermediate chamber 9 and the second intermediate chamber 10 are sealed. This connects the first lower chamber 12 to the first intermediate chamber 9 and the second lower chamber 14 to the second intermediate chamber 10; while the first upper chamber 11 is disconnected from the first intermediate chamber 9 and the second upper chamber 13 is disconnected from the second intermediate chamber 10. At this time, the auxiliary fuel tank supply port 5, the first lower chamber 12, the first intermediate chamber 9, and the engine fuel inlet port 7 are connected, realizing auxiliary fuel tank fuel supply; the auxiliary fuel tank return port 6, the second lower chamber 14, the second intermediate chamber 10, and the engine return port 8 are connected, realizing auxiliary fuel tank return.

[0035] Specifically, the drive mechanism includes a slide 15, which includes a sleeve 15.1. Connecting plates 15.2 are fixed to the left and right sides of the sleeve 15.1. A through hole 15.3 is provided in the center of the connecting plate 15.2. The upper end of the valve stem 16 freely passes through the through hole 15.3. Annular grooves are formed on the outer walls of the valve stem 16 at the upper and lower positions of the connecting plate 15.4. A retaining ring 15.4 is installed on the corresponding connecting plate 15.2, engaging with the annular groove of the valve stem 16. This limits the upper and lower movement of the valve stem 16, enabling the valve stem 16 to move in conjunction with the slide 15. A central rod 17 freely passes through the sleeve 15.1. The central rod 17 is rotatably connected to the valve cover 2 via a steel ball or a bearing. After installation, the central rod 17 can only rotate, not move up and down.

[0036] Rollers 18 are installed at appropriate positions on the outer wall of the central rod 17, arranged vertically. There are two rollers 18 at the upper end, symmetrically arranged left and right, and two rollers 18 at the lower end, also symmetrically arranged left and right. The corresponding sleeve 15.1 has two sliding grooves 19 at both the upper and lower ends. Each sliding groove 19 consists of an inclined surface, a concave surface, and a vertical surface. During the rotation of the central rod 17, the four sets of rollers 18 rotate synchronously.

[0037] Initially, if the two upper rollers 18 are located on the upper surface of the sleeve 15.1, then the two lower rollers 18 are located in the lower groove 19 of the sleeve 15.1 and contact the concave surface of the groove 19. When the center rod 17 rotates 90 degrees, the upper rollers 18 gradually slide through the inclined surface of the upper groove 19 and into the upper groove 19, contacting the concave surface of the groove 19; at the same time, the lower rollers 18 gradually slide out from the inclined surface of the lower groove 19 and finally stop when they reach the lower surface of the sleeve 15.1. Since the center rod 17 only rotates and its up-and-down movement is restricted, during the rotation, as the lower rollers 18 move along the inclined surface of the groove 19, they gradually lift the sleeve 15.1 until the rollers 18 reach the lower surface of the sleeve 15.1, at which point the sleeve 15.1 stops rising. When the sleeve 15.1 moves upward, it will drive the valve stems 16 on both sides to move upward through the connecting plate 15.2, thereby causing the two valve core assemblies 21 to move upward synchronously.

[0038] When the center rod 17 rotates 90 degrees in the opposite direction, the lower roller 18 enters the slide groove 19 again and contacts the concave surface of the slide groove 19. The upper roller 18 reaches the upper surface of the sleeve 15.1 again. At this time, the sleeve 15.1 moves down again, thereby causing the two valve core assemblies 21 to move down synchronously.

[0039] Selectively, a handle 20 is installed on the center rod 17 extending out of the valve cover 2. The handle 20 facilitates operation.

[0040] Selectively, the connecting plate 15.2 has sliding openings 15.5 on both outer sides, which slide in conjunction with vertical slide rails. The slide rails are installed on the inner wall of the valve cover 2. The sliding openings 15.5 and the slide rails guide the vertical movement of the connecting plate 15.2.

[0041] In the fuel supply system, the manual fuel switching valve of this utility model has a simple structure, no electrical control parts, and a reduced number of parts, which significantly reduces material, processing and assembly costs. This demonstrates the characteristics of low cost, easy operation, reliability and durability of the manual fuel switching valve of this utility model.

[0042] Working principle and process:

[0043] 1) such as Figure 3 , Figure 7 As shown, at this time, the valve core assembly is pressed down, the main oil tank oil supply is opened, the auxiliary oil tank oil supply is cut off, the engine oil inlet pipe interface 7 is connected to the main oil tank oil supply pipe interface 3, and the engine oil return pipe interface 8 is connected to the main oil tank oil return pipe interface 4.

[0044] 2) Rotate the center rod 17 clockwise by 90 degrees. The upper roller 18 slides from the upper surface of the sleeve 15.1 to fit against the concave surface of the groove 19; the lower roller 18 slides from the concave surface of the groove 19 to the lower surface of the sleeve 15.1 and gradually lifts the sleeve 15.1 upwards, thereby lifting the valve core assembly. After the valve core assembly is lifted, the main fuel tank supply is cut off, and the auxiliary fuel tank supply is opened. At this time, the engine fuel inlet port 7 is connected to the auxiliary fuel tank supply port 5, and the engine return fuel pipe port 8 is connected to the auxiliary fuel tank return fuel port 6. The switching of the main and auxiliary fuel tank supply circuits of the vehicle is realized by switching the handle 20 between "main" and "auxiliary".

[0045] 3) When switching is required, the center rod 17 can be rotated counterclockwise by 90 degrees. The valve core assembly will move down again, the main oil tank will open the oil supply, and the auxiliary oil tank will cut off the oil supply.

Claims

1. A manual fuel switching valve, comprising a valve body (1), a valve cover (2), and two sets of valve core assemblies (21), characterized in that: The two sets of valve core assemblies (21) are driven to move up and down synchronously through a drive mechanism; The drive mechanism includes a slide (15), which is connected to two sets of valve core assemblies (21) on both sides to form a whole; the upper part of the center rod (17) is rotatably connected to the valve cover (2) and limited in the upper and lower positions, and the lower part of the center rod (17) freely passes through the slide (15); two sets of upper and lower rollers (18) are installed on the center rod (17); the slide (15) is provided with a groove (19) corresponding to the position of the upper and lower rollers (18); during the rotation of the center rod (17); when the upper roller (18) is located at the upper end of the slide (15), the lower roller (18) is located in the groove (19); when the upper roller (18) is located in the groove (19), the lower roller (18) is located at the lower end of the slide (15).

2. The manual fuel switching valve according to claim 1, characterized in that: The slide (15) includes a sleeve (15.1) with grooves (19) on the top and bottom; connecting plates (15.2) are fixed on the left and right sides of the sleeve (15.1), and each connecting plate (15.2) is detachably connected to the valve stem (16) of a set of valve core assemblies (21).

3. A manual fuel switching valve according to claim 2, characterized in that: The slide (19) is V-shaped, with the upper slide (19) opening upwards and the lower slide (19) opening downwards. Both the upper and lower slides (19) are connected to the outside.

4. A manual fuel switching valve according to claim 3, characterized in that: The groove (19) includes an inclined surface, a concave surface and a vertical surface. One end of the inclined surface and the vertical surface are in contact with the end face of the sleeve (15.1), and the other end of the inclined surface and the vertical surface are in contact with the concave surface. The concave surface and the side wall of the roller (18) are in contact and fit together.

5. A manual fuel switching valve according to claim 4, characterized in that: The upper rollers (18) are in two sets and are symmetrical from left to right; the lower rollers (18) are in two sets and are symmetrical from left to right; the position and number of the grooves (19) correspond to the position and number of the rollers (18).

6. A manual fuel switching valve according to claim 5, characterized in that: The connecting plate (15.2) has a through hole (15.3), through which the valve stem (16) freely passes and is limited by a retaining ring (15.4).

7. A manual fuel switching valve according to claim 6, characterized in that: The outermost edge of the connecting plate (15.2) has a sliding opening (15.5), which slides in conjunction with a vertical slide rail, which is fixed to the inner wall of the valve cover (2).

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