CN218719453U - A throttling device applied to pipe joints - Google Patents

Abstract

The utility model discloses a be applied to throttling arrangement of coupling, concretely relates to space flight pipe system technical field, connect and two cap nuts including two, connect the outer peripheral face and be provided with spacing bulge loop, the cap nut cover is established and is connected the outside, spacing bulge loop is used for restricting cap nut axial displacement, including the throttle barrel, the through-hole has been seted up to throttle barrel inside, and the through-hole includes first bell mouth and second taper hole, first bell mouth and second taper hole intercommunication, throttle barrel both ends can stretch into respectively in two cap nuts and with two cap nut threaded connection, and two connect respectively can insert first bell mouth and second taper hole in, and make the terminal surface of two joints respectively with the conical surface in first bell mouth and second taper hole form sealed face. The utility model has the advantages of simple structure, the leakproofness is good, and convenient the dismantlement is changed.

Description

A throttling device applied to pipe joints

technical field

The utility model relates to the technical field of aerospace catheter systems, in particular to a throttling device applied to pipe joints.

Background technique

The throttling device mainly plays the role of reducing the pressure and flow in the pipeline. It is usually used in places where the pressure difference between the front and rear pipelines is large, where pressure reduction is required to reduce wear or where noise and shock reduction are required, such as venting systems; or where small The place where the flow rate needs to be continuously circulated, such as the analysis and sampling pipeline, etc.; or the situation where the fluid in the pipeline is depressurized due to process requirements.

In the field of aerospace, throttling devices are often used in pressurization of storage tanks such as liquid oxygen and liquid hydrogen. For example, during the ground test and flight of liquid rocket engines, it is necessary to pressurize the storage tank through the pressurization system to maintain a certain storage tank pressure. , to make the engine work normally. Among them, the throttling device is connected to the pressurization system pipeline, which is used to throttle and decompress the high-pressure gas, so that the flow rate of the supplementary pressure gas can be controlled within a certain range, and the purpose of stable pressurization required by the storage tank can be realized. In order to reduce the complexity of aerospace pipelines, throttling devices are generally installed at the joints of the pipelines.

At present, the joint of the aerospace conduit is a spherical sealing structure, which is generally connected by the joint, the outer nut and the through joint through thread tightening. According to the patent "CN105135100A-a long-life high-pressure oil pipe sealing joint", the throttling insert at the pipe joint is pressed into the cylindrical groove of the screw-in straight-through joint through a hydraulic device, and forms an interference fit. However, in the pipelines used in aerospace ground tests, there are often different pressure and flow requirements for the medium, so it is often necessary to replace the throttling device, and the replacement process of the throttling insert with interference fit with the straight-through joint is more complicated. Therefore, It is urgent to develop a throttling device that can be quickly installed with the connector of the aerospace catheter according to the different test requirements of the aerospace catheter, to ensure the sealing of the aerospace catheter, to facilitate direct disassembly and replacement, and to shorten the working cycle.

Utility model content

The purpose of this utility model is to provide a throttling device applied to pipe joints to solve the above-mentioned problems in the prior art. The utility model has a simple structure, good sealing performance, and is convenient for disassembly and replacement.

In order to achieve the above object, the utility model provides the following scheme:

The utility model provides a throttling device applied to pipe joints, which comprises two joints and two outer casing nuts, the outer peripheral surface of the joint is provided with a limiting convex ring, the outer casing nut is sleeved on the outer side of the joint, the The limiting protruding ring is used to limit the axial movement of the outer casing nut, and includes a throttling cylinder, and a through hole is opened inside the throttling cylinder, and the through hole includes a first tapered hole and a second tapered hole, The first tapered hole communicates with the second tapered hole, and the two ends of the throttling cylinder can respectively extend into the two outer casing nuts and be threadedly connected with the two outer casing nuts, and the two Two of the joints can be inserted into the first tapered hole and the second tapered hole respectively, and the end faces of the two joints are respectively aligned with the first tapered hole and the second tapered hole. The tapered surfaces of the holes contact to form the sealing surface.

Preferably, the end surfaces of the two joints for contacting the tapered surfaces of the first tapered hole and the second tapered hole are spherical surfaces.

Preferably, the small end surface of the first tapered hole and the small end surface of the second tapered hole have the same area.

Preferably, the first tapered hole and the second tapered hole can communicate through a cylindrical hole.

Preferably, the first tapered hole and the second tapered hole have the same shape and size, and the axes of the first tapered hole and the second tapered hole coincide with the axis of the joint.

Preferably, the material of the throttling cylinder is the same as that of the joint.

Preferably, the material of the throttling cylinder and the joint are stainless steel.

Preferably, the outer peripheral surface of the throttling cylinder is provided with a first threaded section, a fixing convex ring and a second threaded section, and the first threaded section and the second threaded section are respectively arranged on both sides of the throttling cylinder. end, the fixing protruding ring is located between the first thread segment and the second thread segment, and the cross section of the fixing protruding ring is a regular hexagon.

Compared with the prior art, the utility model has achieved the following technical effects:

The utility model provides a throttling device applied to pipe joints. The two ends of the throttling cylinder are respectively threaded with two outer casing nuts, which is convenient for installation and fixing, and the throttling orifice plate can be quickly replaced according to the use requirements. , to improve work efficiency; and in the threaded state, the spherical surfaces of the two joints can be inserted into the first tapered hole or the second tapered hole respectively, and the spherical surfaces of the two joints are respectively connected to the first tapered hole and the second tapered hole The tapered surface of the two tapered holes forms a sealing surface to prevent the leakage of the medium in the pipeline and ensure the sealing effect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a structural schematic diagram of a throttling device applied to pipe joints of the present invention;

Fig. 2 is a schematic structural view of the throttling cylinder of the present invention.

In the figure: 1-joint; 2-outer nut; 3-throttle cylinder; 4-first threaded section; 5-second threaded section; 6-first tapered hole; 7-second tapered hole; 8 -fixed convex ring; 9-limiting convex ring; 10-cylindrical hole.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The purpose of this utility model is to provide a throttling device applied to pipe joints to solve the above-mentioned problems in the prior art. The utility model has a simple structure, good sealing performance, and is convenient for disassembly and replacement.

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1-2, the utility model provides a throttling device applied to pipe joints, including two joints 1, two outer casing nuts 2 and a throttling cylinder 3, and the outer peripheral surface of the joint 1 is provided with a limiting convex ring , the outer casing nut 2 is sleeved on the outer side of the joint 1, the limit protrusion ring 9 is used to limit the axial movement of the outer casing nut 2, and a through hole is opened inside the throttling cylinder body 3, and the through hole includes the first tapered hole 6 and the second The tapered hole 7, the first tapered hole 6 and the second tapered hole 7 are connected, and the two ends of the throttling cylinder 3 can respectively extend into the two outer casing nuts 2 and be threadedly connected with the two outer casing nuts 2, so that The two joints 1 are respectively inserted into the first tapered hole 6 and the second tapered hole 7, and the spherical surfaces of the two joints 1 are respectively in contact with the tapered surfaces of the first tapered hole 6 and the second tapered hole 7. Forming a sealing surface, the throttling cylinder 3 can be matched with the standard aerospace conduit joint QJ2889, and is threadedly connected with the outer nut 2, so that the throttle cylinder 3 can be installed in time and quickly according to the different flow conditions required by the aerospace pipeline and replacement, shorten the working cycle, the structure of the throttling cylinder 3 is firm, and the service life is long; The internal thread of the valve and the external thread of the throttling cylinder 3 are adjusted. The end face of the joint 1 is a spherical surface in contact with the tapered surface and forms a sealing surface, which can prevent the leakage of the medium in the pipeline and ensure the sealing effect. 1 Welded ball joints often used in aerospace pipelines can be selected.

In the embodiment of the present utility model, it is more preferable that the small end surface of the first tapered hole 6 and the small end surface of the second tapered hole 7 have the same area, and can communicate through the cylindrical hole 10, because the first tapered hole 6 and the small end surface of the second tapered hole 7 have the same area. The second tapered hole 7 is respectively connected with the joint 1, and the length of the throttling cylinder 3 is fixed, so the angle of the tapered surface of the first tapered hole 6 and the second tapered hole 7 is fixed, which can be changed by replacing The throttling barrel 3 with a diameter cylindrical hole 10 meets the flow requirements in aerospace pipelines.

In the embodiment of the present utility model, it is more preferable that the shapes and sizes of the first tapered hole 6 and the second tapered hole 7 are the same and the axes of the first tapered hole 6 and the second tapered hole 7 are the same as the axis of the joint 1 Coincident, the axis of the joint 1 and the axis of the pipeline also coincide, the throttle cylinder 3 works reliably, is not easy to be blocked by impurities, and can effectively adjust the medium in the pipeline to the required process state.

In the embodiment of the present utility model, it is more preferable that the material of the throttling cylinder 3 is the same as that of the joint 1, and the throttling cylinder 3 and the joint 1 are selected from the same material. The amount of deformation is similar to form a line seal, which can be consistent with the sealing form of other connectors without a throttling device.

In the embodiment of the present utility model, it is preferable that the material of the throttling cylinder 3 and the joint 1 is stainless steel, which has strong corrosion resistance and heat resistance.

In the embodiment of the present utility model, it is more preferable that the outer peripheral surface of the throttling cylinder 3 is provided with a first threaded section 4, a fixed convex ring 9 and a second threaded section 5, and the first threaded section 4 and the second threaded section 5 are provided with At both ends of the throttling cylinder 3, the fixed protruding ring 9 is located between the first threaded section 4 and the second threaded section 5. The cross section of the fixed protruding ring 9 is a regular hexagon, which is convenient for operators to use with bare hands or tools. Rotating the throttling cylinder 3 facilitates the installation and disassembly of the throttling cylinder 3 .

In the utility model, specific examples have been used to illustrate the principle and implementation of the utility model, and the descriptions of the above examples are only used to help understand the method of the utility model and its core idea; meanwhile, for those of ordinary skill in the art , according to the idea of the utility model, there will be changes in the specific implementation and application range. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (8)

1. The utility model provides a be applied to throttling arrangement of coupling, includes two joints and two outer cover nuts, it is provided with spacing bulge loop to connect the outer peripheral face, the outer cover nut cover is established connect the outside, spacing bulge loop is used for the restriction outer cover nut axial displacement, its characterized in that: including the throttle barrel, the inside through-hole of having seted up of throttle barrel, the through-hole includes first bell mouth and second taper hole, first bell mouth with second taper hole intercommunication, two can be stretched into respectively in the throttle barrel both ends the housing nut and with two housing nut threaded connection, and two connect and can insert respectively first bell mouth with in the second taper hole, and make two the terminal surface that connects respectively with first bell mouth with the conical surface contact in second taper hole forms sealed face.

2. The throttling device applied to the pipe joint according to claim 1, wherein: the end surfaces of the two joints, which are used for being in contact with the conical surfaces of the first conical hole and the second conical hole, are spherical surfaces.

3. The throttling device applied to the pipe joint according to claim 1, wherein: the small end surface of the first conical hole and the small end surface of the second conical hole are the same in area.

4. The throttling device applied to the pipe joint according to claim 3, wherein: the first tapered hole and the second tapered hole can communicate through a cylindrical hole.

5. The throttling device applied to the pipe joint according to claim 1, wherein: the first taper hole and the second taper hole are the same in shape and size, and the axis of the first taper hole and the axis of the second taper hole coincide with the axis of the joint.

6. The throttling device applied to the pipe joint according to claim 1, wherein: the throttle cylinder is made of the same material as the joint.

7. The throttling device applied to the pipe joint according to claim 6, wherein: the material of throttle barrel with the material of joint is the stainless steel.

8. The throttling device applied to the pipe joint according to claim 1, wherein: the outer peripheral surface of the throttling cylinder body is provided with a first thread section, a fixed convex ring and a second thread section, the first thread section and the second thread section are respectively arranged at two ends of the throttling cylinder body, the fixed convex ring is positioned between the first thread section and the second thread section, and the cross section of the fixed convex ring is in a regular hexagon shape.

Images