Current-limiting joint

Abstract

The utility model discloses a current-limiting joint which is composed of a shell and a filter screen, the shell is provided with a fluid channel, a cavity and a fluid opening, the fluid opening is of a flaring type or a non-flaring type and is an independent adapter, the throttling speed regulation function is achieved through a throttling hole in the fluid opening, and the filter screen is a novel stainless steel base body laser hole type filter screen. The filter screens are fixed to the two ends of the throttling hole in a threaded connection and laser spot welding anti-loosening mode, the throttling hole is prevented from being blocked by redundant objects, the structure is small, exquisite and novel, and small and light weight of the valve is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of aviation technology, and particularly relates to a flow-limiting joint. Background Art

[0002] The flow-limiting joint is used as a throttling element in the system and adopts a small-hole throttling structure, which is a common accessory in the hydraulic system. The flow-limiting joint in the prior art is prone to blockage of the throttling hole, and the assembly process of the flow-limiting valve in the related art is relatively cumbersome, resulting in the technical problem of low production efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a flow-limiting joint, which integrates a filter screen. The filter screen is a novel stainless steel matrix laser-drilled hole type filter screen, and the filter screen is integrated on the flow-limiting joint through threaded connection. The structure is small and novel, which is beneficial to the miniaturization and light weight of the valve parts.

[0004] The technical solution of the utility model: A flow-limiting joint includes a shell and a filter screen. A fluid channel is arranged in the shell, cavities are arranged at both ends of the fluid channel, one end of the cavity is connected through the fluid channel, fluid openings are arranged at the other ends of the cavities, internal threads are arranged on the inner walls of the fluid openings close to the cavities, external threads are arranged at the ports of the filter screen, and the external threads are matched with the internal threads to place the filter screen in the cavity. The fluid openings of the flow-limiting joint are of the flared type or non-flared type, and it is an independent adapter. The throttling speed regulation function is realized through the throttling hole inside.

[0005] Furthermore, the filter screen is a conical stainless steel laser-drilled hole part, and is integrated on the shell of the flow-limiting joint through threaded connection. After the filter screen is installed, the large-diameter end of the filter screen is fixedly connected with the shell through laser spot welding to achieve anti-loosening. Two stainless steel matrix laser-drilled hole type filter screens are fixed at both ends of the throttling hole through threaded connection and laser spot welding anti-loosening to prevent the throttling hole from being blocked by foreign matters.

[0006] The beneficial effects of the utility model:

[0007] This flow-limiting joint integrates a filter screen. The filter screen is a novel stainless steel matrix laser-drilled hole type filter screen, and the filter screen is integrated on the flow-limiting joint through threaded connection. The structure is small and novel, which is beneficial to the miniaturization and light weight of the valve parts, and at the same time realizes the anti-blocking protection of the throttling hole. Description of the Drawings

[0008] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the utility model, and are used together with the specification to explain the principles of the utility model. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:

[0009] Figure 1 Structural schematic diagram of the non-flaring type flow-limiting joint provided by the present utility model;

[0010] Figure 2 Structural schematic diagram of the flaring type flow-limiting joint provided by the present utility model;

[0011] In the attached drawings: 1 - housing, 11 - cavity, 12 - fluid passage, 13 - fluid opening, 14 - internal thread; 2 - filter screen, 21 - external thread. Detailed implementation manners

[0012] Now, example embodiments will be described more fully with reference to the attached drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present utility model will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0013] Please refer to Figure 1-2 , which shows the structural schematic diagrams of the non-flaring type and flaring type flow-limiting joints provided by the present utility model, including a housing 1 and a filter screen 2. A fluid passage 12 is provided inside the housing 1. Cavities 11 are provided at both ends of the fluid passage 12. One end of each cavity 11 is connected through the fluid passage 12. Fluid openings 13 are provided at the other ends of the cavities 11. Internal threads 14 are provided on the inner walls of the fluid openings 13 close to the cavities 11. External threads 21 are provided at the ports of the filter screen 2. The external threads 21 are cooperatively arranged with the internal threads 14 to place the filter screen 2 inside the cavity 11. The filter screen 2 is a stainless steel laser-drilled conical structure filter screen. The large-diameter end of the filter screen 2 is fixedly connected to the housing by laser spot welding. Two stainless steel matrix laser-drilled filter screens are fixed at both ends of the throttling hole by means of threaded connection and laser spot welding for loosening prevention, so as to prevent the throttling hole from being blocked by foreign matters.

[0014] The above embodiments are only used to illustrate the technical solutions of the present utility model and are not restrictive. Any modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present utility model, as long as they do not depart from the spirit and scope of the technical solutions of the present utility model, are all covered within the scope of the claims of the present utility model.

Claims

1. A current limiting joint, characterized in that: The invention comprises a shell (1) and a filter (2), wherein a fluid channel (12) is arranged in the shell (1), cavities (11) are arranged at both ends of the fluid channel (12), one end of the cavity (11) is connected via the fluid channel (12), and the other end of the cavity (11) is provided with a fluid opening (13), and an internal thread (14) is arranged on the inner wall of the fluid opening (13) close to the cavity (11), and an external thread (21) is arranged at the port of the filter (2), and the external thread (21) cooperates with the internal thread (14) to place the filter (2) in the cavity (11).

2. The current limiting joint according to claim 1, characterized in that: The filter screen (2) is a cone-shaped structure.

3. The current limiting joint according to claim 1, characterized in that: The filter screen (2) is a stainless steel laser-perforated filter screen.

4. The current limiting joint according to claim 1, characterized in that: The large-diameter end of the filter screen (2) is fixedly connected to the shell (1) by laser spot welding.

5. The current limiting joint according to claim 1, characterized in that: The fluid opening (13) is of a flared type or a non-flared type.

Images