Double-oil-level pressure feedback device

Abstract

The utility model discloses a double-oil-level pressure feedback device. The double-oil-level pressure feedback device comprises a middle shell, wherein the middle shell is arranged between an upper shell and a lower shell and is connected with the upper shell and the lower shell through long screws; a first floater assembly and a first bell jar valve assembly are arranged in the upper shell, a second floater assembly and a second bell jar valve assembly are arranged in the lower shell, a first valve seat is arranged above the first bell jar valve assembly, the first floater assembly is connected with a first rotating shaft, the first valve seat is connected with the side, close to the first rotating shaft, of the first floater assembly, and a second valve seat is arranged above the second bell jar valve assembly. The second floater assembly is connected with the second rotating shaft, the second valve seat is connected with the side, close to the second rotating shaft, of the second floater assembly, an oil leakage hole is formed in the middle shell, a first channel is formed in one side of the middle shell and connected with a first pipe connector, and the first channel is communicated with the first bell jar valve assembly. A second channel is arranged below the lower shell and connected with the second pipe connector, and the second channel is communicated with the second bell jar valve assembly. The combination that the two floater assemblies and the bell jar valve work in a matched mode is adopted, pressure feedback is carried out under two different liquid level heights, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of a pressure refueling subsystem of a fuel system, in particular to a dual-oil level pressure feedback device. Background Art

[0002] As society rapidly develops, it also pursues improved efficiency. The increasing demand for construction machinery products also places new demands on the efficiency of construction machinery. Current oil level feedback devices typically only control one fluid level. To save working time, maximize working hours, and ultimately improve work efficiency and maximize profits, the problem of the single pressure feedback device must be addressed. Therefore, dual oil level pressure feedback is proposed. Utility Model Content

[0003] The purpose of this utility model is to provide a device that can reduce product space while ensuring the required diameter. It can quickly and conveniently achieve pipe docking and disconnection in a narrow space, and has the advantages of simple and convenient operation. After docking and disconnection, the sealing performance is reliable and the steel ball can be prevented from rotating.

[0004] The technical solution of the utility model is as follows: a dual oil level pressure feedback device, including an upper shell, a middle shell and a lower shell. The middle shell is arranged between the upper shell and the lower shell and is fastened with a long screw; a float assembly 1 and a bell valve assembly 1 are arranged in the upper shell, a float assembly 2 and a bell valve assembly 2 are arranged in the lower shell, a valve seat 1 is arranged above the bell valve assembly 1 to form a sealing pair, the float assembly 1 is connected to the rotating shaft 1, the valve seat 1 is fixedly connected to the side of the float assembly 1 close to the rotating shaft 1, and a valve seat 1 is arranged above the bell valve assembly 2 A valve seat comprises two sealing elements, a float assembly is connected to a second rotating shaft, and the valve seat is fixedly connected to the side of the float assembly near the second rotating shaft. The middle housing is provided with a plurality of radial oil leakage holes. A channel is provided on one side of the middle housing, avoiding the oil leakage holes, and is connected to a pipe joint. This channel is in communication with a bell valve assembly, and the pipe joint serves as a pressure transmission interface for the float assembly. A channel is provided below the lower housing, connected to a pipe joint. This channel is in communication with a bell valve assembly, and the pipe joint serves as a pressure transmission interface for the float assembly. Two float assemblies and bell valves are used in a coordinated working combination, arranged in an upper and lower configuration and secured with long screws. The middle housing serves as both a support for the upper float assembly and a lateral shield for the lower float assembly. The float assembly drives the bell valve assembly to descend and ascend, while the float assembly drives the bell valve assembly to descend and ascend.

[0005] Furthermore, a hole is provided on the side surface of the upper shell, and the position of the hole is higher than an upper surface of the float assembly.

[0006] Furthermore, three oil leakage holes are provided.

[0007] Furthermore, there are three long screws.

[0008] Beneficial effects of the utility model:

[0009] The combined integrated design concept is adopted, and the shared middle shell is used as a bridge to realize the upper and lower structural layout of the two sets of valves. The float assembly and the valve assembly are linked to ensure that the valve is closed when the float is raised and the valve is opened when the float falls, realizing pressure feedback at two different liquid level heights, saving working time, improving work efficiency and maximizing benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments of the present invention and, together with the specification, explaining the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0011] Figure 1 This is a schematic structural diagram of the dual oil level pressure feedback device provided by the utility model;

[0012] In the attached figure:

[0013] 1-upper housing, 11-float assembly 1, 111-rotating shaft 1, 12-bell valve assembly 1, 121-valve seat 1, 13-hole

[0014] 2-middle housing, 21-oil leakage hole, 22-channel 1

[0015] 3-lower housing, 31-float assembly 2, 311-rotating shaft 2, 32-bell valve assembly 2, 321-valve seat 2, 33-channel 2

[0016] 4-long screw, 5-pipe connector 1, 6-pipe connector 2. DETAILED DESCRIPTION

[0017] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0018] See also Figure 1The figure shows a schematic structural diagram of the dual oil level pressure feedback device provided by the present invention, comprising an upper shell 1, a middle shell 2, and a lower shell 3. The middle shell 2 is arranged between the upper shell 1 and the lower shell 3 and is fastened together by three long screws 4. A float assembly 11 and a bell valve assembly 12 are arranged in the upper shell 1, and a float assembly 2 31 and a bell valve assembly 2 32 are arranged in the lower shell 3. A valve seat 121 is provided above the bell valve assembly 12 to form a sealing pair. The float assembly 11 is connected to a rotating shaft 111. The valve seat 121 and the float assembly 11 are close to the rotating shaft 111. One side is fixedly connected. A valve seat 2 321 is provided above the bell valve assembly 2 32 to form a sealing pair. The float assembly 2 31 is connected to the rotating shaft 2 311. The valve seat 2 321 is fixedly connected to the side of the float assembly 2 31 near the rotating shaft 2 311. The middle housing 2 is provided with a plurality of oil leakage holes 21 along its radial direction. A channel 1 22 is provided on one side of the middle housing 2, avoiding three of the oil leakage holes 21, and is connected to the pipe joint 1 5. The channel 1 22 communicates with the bell valve assembly 1 12. A channel 2 33 is provided below the lower housing 3 and is connected to the pipe joint 2 6. The channel 2 33 communicates with the bell valve assembly 2 32. A hole 13 is provided on the side of the upper housing 1, and the opening is located higher than the upper surface of the float assembly 11.

[0019] According to the system settings, when the upper pressure feedback device needs to be activated, the fuel in the pilot chamber of the pressure refueling shut-off valve (not owned by this patent, but belonging to the pressure refueling control subsystem) flows into the bell valve assembly 12 through the pipe joint 5 and flows out through the oil leakage hole 21 at the bottom of the middle shell 2; when the liquid level in the fuel tank rises to the preset sensing height of the float assembly 11, the float assembly 11 floats up, driving the bell valve assembly 12 to close, and the pressure in the bell valve assembly 12 increases and is fed back to the pressure refueling shut-off valve (not owned by this patent, but belonging to the pressure refueling control subsystem) through the pipeline, thereby realizing the pressure feedback function.

[0020] According to the system settings, when the lower pressure feedback device needs to be activated, the fuel in the pilot chamber of the pressure refueling shut-off valve (not owned by this patent, but belonging to the pressure refueling control subsystem) flows into the bell valve assembly 2 32 through the pipe joint 2 6 and flows out through the oil leakage hole 21 at the bottom of the middle shell 2; when the liquid level in the fuel tank rises to the preset sensing height of the float assembly 2 31, the float assembly 2 31 floats up, driving the bell valve assembly 2 32 to close, and the pressure in the bell valve assembly 2 32 increases and is fed back to the pressure refueling shut-off valve (not owned by this patent, but belonging to the pressure refueling control subsystem) through the pipeline, thereby realizing the pressure feedback function.

[0021] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. Any modification or equivalent substitution of the technical solution of the present invention made by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A dual oil level pressure feedback device, characterized by: The invention comprises an upper shell (1), a middle shell (2) and a lower shell (3), wherein the middle shell (2) is arranged between the upper shell (1) and the lower shell (3) and is fastened by a long screw (4); a float assembly (11) and a bell valve assembly (12) are arranged in the upper shell (1); a float assembly (31) and a bell valve assembly (32) are arranged in the lower shell (3); a valve seat (121) is provided above the bell valve assembly (12) to form a sealing pair; the float assembly (11) is connected to a rotating shaft (111); the valve seat (121) is fixedly connected to the side of the float assembly (11) close to the rotating shaft (111); the bell valve assembly (32) is fixed ... A valve seat 2 (321) is provided above the second component (32) to form a sealing pair. The second float component (31) is connected to the second rotating shaft (311). The second valve seat 2 (321) is fixedly connected to the side of the second float component (31) close to the second rotating shaft (311). A plurality of oil leakage holes (21) are opened on the middle shell (2) along its radial direction. A channel 1 (22) is provided on one side of the middle shell (2) to avoid the oil leakage holes (21) and to connect with the first pipe joint (5). The channel 1 (22) is communicated with the first bell valve component (12). A channel 2 (33) is provided below the lower shell (3) to connect with the second pipe joint (6). The channel 2 (33) is communicated with the second bell valve component (32).

2. The dual oil level pressure feedback device according to claim 1, characterized in that: The side surface of the upper shell (1) is provided with a hole (13), and the position of the hole is higher than the upper surface of the float assembly (11).

3. The dual oil level pressure feedback device according to claim 1, characterized in that: There are three oil leakage holes (21).

4. The dual oil level pressure feedback device according to claim 1, characterized in that: There are three long screws (4).

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