CN106122609A - A kind of fluid feedthrough component with dual-seal function for nuclear device - Google Patents

Abstract

The invention discloses a fluid feedthrough with double sealing function for a nuclear device, which mainly includes two parts: a double sealing part and a quick-connect sealing part. The fixed flange is consolidated; the quick-connect sealing part is sealed to connect the inner fluid pipe and the outer fluid pipe. Flange connection, the two ends of the secondary seal are respectively connected to the fixed sleeve and the protective shaft sleeve by welding, the sealing head of the quick-connect sealing part is connected to the protective shaft sleeve by welding, and the sealing cylinder is respectively connected to the sealing head and the sealing washer by welding Connection, the sealing gasket is connected with the outer fluid pipe by welding, and the two ends of the quick joint are respectively welded with the inner fluid pipe and the outer fluid pipe. The invention has double protection sealing elements, which can not only withstand high pressure sealing, but also have high vacuum sealing ability.

Description

A fluid feedthrough with double sealing function for nuclear installation

technical field

The invention relates to the field of nuclear device fluid feedthroughs, in particular to a fluid feedthrough with double sealing functions for nuclear devices.

Background technique

The safety of fluid pipeline connections in nuclear installations is very important. If leakage occurs, it will not only damage the equipment, but also cause serious pollution. At present, the connections between fluid pipelines in nuclear installations are generally connected by direct welding or quick-connect joints. This kind of connection has only one layer of sealing protection, and the safety cannot be guaranteed. Moreover, due to the lack of thermal compensation components, when high-temperature fluid is introduced, thermal stress will be generated, causing deformation of the welding part.

SUMMARY OF THE INVENTION The object of the present invention is to provide a fluid feedthrough with double sealing function for nuclear installations, so as to solve the problems existing in the fluid pipelines of nuclear installations in the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A fluid feedthrough with double sealing function for a nuclear device, characterized in that it comprises:

The inner fluid pipe and the outer fluid pipe arranged horizontally on the common central axis;

The quick-connect sealing part is composed of a sealing cylinder, a sealing head with a common central axis welded at the mouth of the sealing cylinder, and a quick joint with a common central axis arranged in the sealing cylinder. One end of the inner fluid pipe penetrates into the sealing cylinder from the sealing head, and the outer fluid pipe One end of the pipe penetrates into the sealing cylinder from the bottom of the sealing cylinder, the inner and outer fluid pipes share the central axis with the sealing cylinder, the penetrating ends of the inner and outer fluid pipes are respectively welded in the sealing head, and the inner and outer fluid pipes are sealed by the sealing head;

Protective bushing, the concentric bushing is sleeved on the inner fluid pipe and welded with the inner fluid pipe, and the right end of the protective bushing is welded to the sealing head in the quick-connect sealing part;

The fixed flange is set on the protective shaft sleeve and welded together with the protective shaft sleeve. The left flange surface of the fixed flange away from the quick-connect sealing part is welded to the shell of the nuclear device;

The double sealing part includes a fixed sleeve, a primary seal, and a secondary seal. The central shaft of the fixed sleeve is sleeved outside the protective sleeve, and the left end of the fixed sleeve and the fixed flange face the right side of the quick-connect sealing part. The flange surface is welded, the primary seal is set in the fixed sleeve and the central shaft is sleeved on the protective sleeve, the left end of the primary seal is welded to the flange surface on the right side of the fixed flange, the right end of the primary seal is connected to the protective sleeve Welding, the secondary seal is set outside the fixed sleeve and the central shaft is sleeved on the protective sleeve, the left end of the secondary seal is welded to the right end of the fixed sleeve, and the right end of the secondary seal is welded to the protective sleeve.

The fluid feedthrough with double sealing function for nuclear devices is characterized in that: the flange surface on the right side of the fixing flange is formed with two circles of circular bosses, and among the double sealing parts, the first The left end of the seal is welded to the circular boss on the outer ring on the right side of the fixed flange.

The above-mentioned fluid feedthrough with dual sealing functions for nuclear devices is characterized in that: both the primary seal and the secondary seal are cylinders with multi-channel curved structures.

The above-mentioned fluid feedthrough with double sealing function for nuclear devices is characterized in that: in the quick-connect sealing part, a sealing gasket is welded at the center of the bottom of the sealing cylinder where the outer fluid pipe penetrates, The sealing washer is sleeved on the outer fluid pipe and welded with the outer fluid pipe.

The beneficial effect of the invention is that it has double protection sealing elements, which can not only withstand high pressure sealing, but also have high vacuum sealing ability. At the same time, it has the functions of vacuum leakage monitoring and cooling water leakage monitoring, which can effectively prevent secondary leakage and has a high safety protection function. The on-site construction adopts quick connectors, which are convenient and quick to install, and the design interface is compatible with remote welding operations; the seals with multi-channel curved structures can effectively withstand high temperature deformation, have good safety performance and a high degree of intensification.

Description of drawings

Fig. 1 is a schematic perspective view of the structure of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the present invention.

In Figure 1: 1. Inner fluid pipe, 2. Protective shaft sleeve, 3. Housing, 4. Fixed flange, 5. Double sealing device, 5a. Primary seal, 5b. Fixed sleeve, 5c. Secondary Seal, 6. Quick-connect sealing device, 6a. Seal head, 6b. Seal cylinder, 6c. Quick connector, 6d. Seal washer, 7. Outer fluid pipe.

detailed description

As shown in Figure 1 and Figure 2, a fluid feedthrough with double sealing function for nuclear installations, including:

The inner fluid pipe 1 and the outer fluid pipe 7 arranged horizontally on the common central axis;

The quick-connect sealing part 6 is composed of a sealing cylinder 6b, a sealing head 6a welded to the mouth of the sealing cylinder 6b with a common central axis, and a quick joint 6c with a common central axis arranged in the sealing cylinder 6b. One end of the inner fluid pipe 1 is connected from the sealing head 6a penetrates into the sealing cylinder 6b, one end of the outer fluid pipe 7 penetrates into the sealing cylinder 6b from the bottom of the sealing cylinder 6b, the inner and outer fluid pipes 1, 7 share the central axis with the sealing cylinder 6b, and the inner and outer fluid pipes 1, 7 penetrate into the sealing cylinder 6b. The ends are respectively welded in the sealing head 6a, and the inner and outer fluid pipes 1, 7 are sealed and connected by the sealing head 6a;

Protective bushing 2, its co-centered bushing is on the inner fluid pipe 1 and welded with the inner fluid pipe 1, the right end of the protective bushing 2 is welded with the sealing head 6a in the quick-connect sealing part 6;

The fixed flange 4 is set on the protective bushing 2 and welded together with the protective bushing 2. The left flange surface of the fixed flange 4 away from the quick-connect sealing part 6 is welded to the shell 3 of the nuclear device;

The double sealing part 5 includes a fixed sleeve 5b, a primary seal 5a, and a secondary seal 5c. The concentric shaft of the fixed sleeve 5b is sleeved outside the protective sleeve 2, and the left end of the fixed sleeve 5b faces the fixed flange 4. The flange surface on the right side of the quick-connect sealing part 6 is welded. The primary seal 5a is set in the fixed sleeve 5b and is sleeved on the protective sleeve 2 with the central shaft. The left end of the primary seal 5a is connected to the right side of the fixed flange 4. The flange surface is welded, the right end of the primary seal 5a is welded to the protective shaft sleeve 2, the secondary seal 5c is set outside the fixed sleeve 5b and sleeved on the protective sleeve 2 with the central shaft, the left end of the secondary seal 5c is connected to the fixed The right end of the sleeve 5b is welded, and the right end of the secondary seal 5c is welded with the protective shaft sleeve 2 .

The flange surface on the right side of the fixed flange 4 is formed with two circles of circular bosses. In the double sealing part 5, the left end of the primary seal 5a is welded to the circular bosses on the outer ring of the right side of the fixed flange 4 .

Both the primary seal 5a and the secondary seal 5c are cylindrical bodies with multi-channel curved structures.

In the quick-connect sealing part 6 , a sealing washer 6 d is welded at the center of the bottom of the sealing cylinder 6 b where the outer fluid pipe 7 penetrates, and the sealing washer 6 d is sleeved on the outer fluid pipe 7 and welded with the outer fluid pipe 7 .

The fluid feedthrough with double sealing function used in nuclear devices of the present invention mainly includes two parts: a double sealing part 5 and a quick-connect sealing part 6. The fixed flange 4 is consolidated, and the quick-connect sealing part 6 is sealingly connected to the inner fluid pipe 1 and the outer fluid pipe 7 .

The right end of the protective sleeve 2 is connected to the inner fluid pipe 1 by welding; one side of the fixed flange 4 has two circular bosses, which are positioned by bolts and welded with the housing 3 . One end of the primary seal 5a of the double seal component 5 is welded to the outer circular boss of the fixed flange 4, and one end is welded to the protective shaft sleeve 2, the fixed sleeve 5b is connected to the fixed flange 4 by welding, and the secondary seal The two ends of 5c are respectively connected with the fixed sleeve 5b and the protective shaft sleeve 2 by welding. The sealing head 6a of the quick-connect sealing part 6 is connected to the protective shaft sleeve 2 by welding, the sealing cylinder 6b is respectively connected to the sealing head 6a and the sealing gasket 6d by welding, the sealing gasket 6d is connected to the outer fluid pipe 7 by welding, and the two quick joints 6c The ends are welded with the inner fluid pipe 1 and the outer fluid pipe 7 respectively.

When working, the fluid in the nuclear device flows into the outer fluid pipe 7 through the inner fluid pipe 1 through the quick joint 6c, and the double sealing part 5 performs two-stage sealing on the inner cavity of the nuclear device to prevent leakage of nuclear radiation materials. At the same time, the primary seal 5a and The secondary sealing member 5c has a cylinder with multi-channel curved structure, which can compensate thermal stress deformation caused by high temperature. On the basis of connecting the fluid channel, the quick-connect sealing part 6 performs secondary sealing on the fluid pipeline to effectively prevent fluid leakage.

Claims (4)

1. A fluid feedthrough with double sealing function for nuclear installations, characterized in that: comprising: The inner fluid pipe and the outer fluid pipe arranged horizontally on the common central axis; The quick-connect sealing part is composed of a sealing cylinder, a sealing head with a common central axis welded at the mouth of the sealing cylinder, and a quick joint with a common central axis arranged in the sealing cylinder. One end of the inner fluid pipe penetrates into the sealing cylinder from the sealing head, and the outer fluid pipe One end of the pipe penetrates into the sealing cylinder from the bottom of the sealing cylinder, the inner and outer fluid pipes share the central axis with the sealing cylinder, the penetrating ends of the inner and outer fluid pipes are respectively welded in the sealing head, and the inner and outer fluid pipes are sealed by the sealing head; Protective bushing, the concentric bushing is sleeved on the inner fluid pipe and welded with the inner fluid pipe, and the right end of the protective bushing is welded to the sealing head in the quick-connect sealing part; The fixed flange is set on the protective shaft sleeve and welded together with the protective shaft sleeve. The left flange surface of the fixed flange away from the quick-connect sealing part is welded to the shell of the nuclear device; The double sealing part includes a fixed sleeve, a primary seal, and a secondary seal. The central shaft of the fixed sleeve is sleeved outside the protective sleeve, and the left end of the fixed sleeve and the fixed flange face the right side of the quick-connect sealing part. The flange surface is welded, the primary seal is set in the fixed sleeve and the central shaft is sleeved on the protective sleeve, the left end of the primary seal is welded to the flange surface on the right side of the fixed flange, the right end of the primary seal is connected to the protective sleeve Welding, the secondary seal is set outside the fixed sleeve and the central shaft is sleeved on the protective sleeve, the left end of the secondary seal is welded to the right end of the fixed sleeve, and the right end of the secondary seal is welded to the protective sleeve. 2. A fluid feedthrough with double sealing function for nuclear devices according to claim 1, characterized in that: the flange surface on the right side of the fixing flange is formed with two circles of circular bosses, double In the sealing part, the left end of the primary seal is welded to the circular boss on the outer ring on the right side of the fixed flange. 3. A fluid feedthrough with dual sealing functions for nuclear devices according to claim 1, characterized in that: the primary seal and the secondary seal are cylinders with multi-channel curved structures . 4. A fluid feedthrough with double sealing function for nuclear devices according to claim 1, characterized in that: in the quick-connect sealing part, the center of the bottom of the sealing cylinder where the outer fluid pipe penetrates is A sealing washer is welded at the position, and the sealing washer is sleeved on the outer fluid pipe and welded with the outer fluid pipe.