CN218236597U - Damping device of gas double-wall pipe - Google Patents

Abstract

The utility model provides a damping device of two wall pipes of gas welds in the periphery of two wall pipes of gas, and two through-holes that pierce through the pipe wall are offered along diameter direction with the symmetry to the outer tube of this two wall pipes of gas, damping device includes a pair of shock absorber support, welds respectively on two through-holes of outer tube, and shock absorber support includes screw thread joint chair and damper, and wherein, the screw thread joint chair is the pipe fitting, welds on the through-hole sealedly, and the inner wall is equipped with the internal thread, and damper connects in the screw thread joint chair through this internal thread fastening, and the lower extreme is deep into the outer tube and is tight with the outer wall top of inner tube, and this damper utilizes elasticity of itself to live the inner tube by relative direction to reduce the relative vibration between this inner tube and the outer tube. The utility model discloses effectively reduced the vibration of the relative outer tube of inner tube, avoided the damage to the inner tube, had simple structure, processing convenience, arranged in a flexible way, the gas tightness is good, longe-lived, safe and reliable, strong adaptability's advantage.

Description

Damping device of gas double-wall pipe

Technical Field

The utility model relates to a gaseous fuel transmission equipment, in particular to damping device of gas double-walled pipe belongs to diesel engine technical field.

Background

Along with the environmental protection concept gradually falls into reality, diesel engines which take clean energy (LNG, LPG and the like) as main fuels appear on the market, but the gas fuels are easy to leak, flammable and explosive, so that double-wall pipes are generally adopted for transmission in the production and use processes of the gas fuels to reduce the leakage risk. Compared with the common single-wall pipe, the double-wall pipe has the advantages that the processing difficulty and the technical requirement are greatly improved, and particularly, the double-wall pipe with more bent parts is more complex. One of the key points is how to reduce the relative vibration between the inner pipe and the outer pipe of the double-wall pipe, and the problems can be solved by a plurality of existing methods, such as adding a protective cushion block, utilizing a stud to directly connect the outer wall and the inner wall, and the like. However, these methods have problems such as complicated processing and production, damage to the inner tube, lack of generality, and the like, and may also have problems such as generation of static electricity and stress concentration.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, providing a damping device of gas double-walled pipe, installing on gas double-walled pipe to reduce the inner tube and for the vibrations of outer tube, avoid causing additional stress, reach production simple and easy, simple to operate, arrange effects such as nimble.

Based on the above-mentioned purpose, the utility model discloses a technical scheme as follows:

a damping device of a gas double-wall pipe is welded on the periphery of the gas double-wall pipe, and the gas double-wall pipe is made of stainless steel and comprises an outer pipe and an inner pipe which are coaxial; the method is characterized in that: the outer tube set up two through-holes that pierce through the pipe wall along diameter direction on the symmetry, damping device includes a pair of shock absorber support, weld respectively on two through-holes of outer tube, each shock absorber support includes screw thread joint chair and damper assembly, the screw thread joint chair is a pipe fitting, weld sealingly in on the through-hole, the inner wall is equipped with the internal thread, damper assembly through this internal thread fastening connect in the screw thread joint chair, the lower extreme deepens the outer tube and with the outer wall top of inner tube is tight, along diameter direction symmetrical arrangement's a pair of damper assembly, utilize elasticity of itself will by relative direction the inner tube supports to reduce the relative vibration between this inner tube and the outer tube.

Further, the damping assembly comprises a nut, a damping piston and a spring; the nut through the external screw thread connection of its periphery in on the screw joint seat, inside is equipped with lower extreme open-ended blind hole, damping piston is including the piston rod on upper portion and the piston head of lower part, and the upper end of this piston rod stretches into the blind hole of nut just can slide in this blind hole, the lower terminal surface of piston head support tightly in the outer wall of inner tube, the spring set up in and the cover is arranged in the hole of screw joint seat on the piston rod, the upper end top touch in the lower extreme of nut, the lower extreme top touch in the up end of piston head to the production pushes away and supports the elasticity of inner tube.

Furthermore, a sleeve is arranged between the piston rod and the inner wall of the blind hole of the nut, the sleeve and the blind hole are in interference fit without relative movement, the piston rod and the sleeve are in clearance fit, and the piston rod slides in the sleeve.

Furthermore, the material of screw thread connection seat be stainless steel, the material of nut is the aluminium bronze alloy, telescopic material is polyether ether ketone engineering plastics, the material of spring is stainless steel spring wire, the material of damping piston is the tin bronze alloy.

Furthermore, a sealing groove is arranged at the joint of the screw cap and the threaded connecting seat, and a sealing ring is arranged in the sealing groove.

Furthermore, the contact position of the lower end of the spring and the piston head is fixed by strong glue.

Furthermore, grease is smeared at the contact part of the inner wall of the spring and the piston rod.

Furthermore, the installation quantity of the damping devices on the gas double-wall pipe is determined according to the requirement and is uniformly distributed at intervals.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained:

1. the utility model discloses a spring force supports the inner tube, has both effectively reduced the vibration of the relative outer tube of inner tube, has avoided causing the damage to the inner tube again.

2. The installation positions and the number of the damping devices on the gas double-wall pipe are arranged according to the data requirements of the gas double-wall pipe, and the effects of flexibility, changeability and strong adaptability are achieved.

3. Each component is made of wear-resistant, heat-resistant, self-lubricating, anti-static and high-strength materials such as stainless steel, aluminum bronze alloy, polyether ether ketone engineering plastic and tin bronze alloy, so that static electricity is led out, spark is reduced, damage to the inner tube is reduced, and the service life of the damping device is prolonged.

4. The utility model has the advantages of simple structure, convenient processing, excellent air tightness, safety and reliability.

Drawings

Fig. 1 is a schematic view of the installation of the present invention on a gas double-walled pipe.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a schematic view of the shock-absorbing assembly.

Fig. 5 is a cross-sectional view D-D of fig. 4.

In the figure, the position of the upper end of the main shaft,

the damping device comprises an outer pipe, an inner pipe, a threaded connection seat, a damping assembly, a nut, a damping piston, a spring, a sleeve and a sealing ring, wherein the outer pipe is 1, the inner pipe is 2, the threaded connection seat is 3, the damping assembly is 4, the nut is 5, the damping piston is 6, the spring is 7, the sleeve is 8, and the sealing ring is 9.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the scope of the present invention is not limited to the embodiments described below.

The utility model discloses install on the double-walled pipe of gas, please combine to refer to fig. 1 and fig. 2 for reduce the vibration of the inner tube of this double-walled pipe of gas for the outer tube. The gas double-wall pipe is made of stainless steel and comprises an outer pipe 1 and an inner pipe 2 which are coaxial, see fig. 2, and according to the requirement of shock absorption, two through holes are symmetrically formed in the corresponding position of the outer pipe 1 along the diameter direction, and penetrate through the pipe wall of the outer pipe 1 and are coaxial.

Referring to fig. 3, the damping device is welded to the outer periphery of the gas double-walled pipe, and includes a pair of damping brackets welded to the two through holes of the outer pipe 1, respectively, so that the damping brackets are symmetrically arranged along the diameter direction of the gas double-walled pipe, and each damping bracket includes a screw socket 3 and a damping component 4.

The threaded connection seat 3 is a pipe fitting and is welded on the through hole of the outer pipe 1 in a sealing mode, and inner threads are arranged on the inner wall of the threaded connection seat. The damping component 4 is fastened and connected in the screw thread connecting seat 3 through the internal thread, and the lower end of the damping component extends into the outer tube 1 and is tightly propped against the outer wall of the inner tube 2. The damping member 4 supports the inner tube 2 in the opposite direction by its own elastic force, so that the inner tube 2 and the outer tube 1 generate a force interaction therebetween, thereby reducing the relative vibration of the inner tube 2 and the outer tube 1.

Referring to fig. 4 and 5, the damping assembly 4 includes a nut 5, a damping piston 6, and a spring 7.

The periphery of the nut 5 is provided with an external thread matched with the internal thread of the screw thread joint seat 3, so that the nut 5 is fixedly connected to the upper end of the screw thread joint seat 3 through the screw thread; a sealing groove is arranged on the nut 5 connected with the threaded connecting seat 3, and a sealing ring 9 is arranged in the sealing groove to prevent gas from escaping; and a blind hole with an opening at the lower end is formed in the nut 5. The damping piston 6 comprises an upper piston rod and a lower piston head; the upper end of the piston rod extends into the blind hole of the nut 5 and can slide in the blind hole, and the lower end face of the piston head is tightly pressed against the outer wall of the inner tube 2. The damping piston is characterized in that a sleeve 8 is arranged between the piston rod and the inner wall of the blind hole of the nut 5, the outer wall of the sleeve 8 is in interference fit with the inner wall of the blind hole, relative movement does not occur, the periphery of the piston rod is in clearance fit with the inner wall of the sleeve 8, and the piston rod, namely the damping piston 6 slides in the sleeve 8. The spring 7 is arranged in an inner hole of the threaded connection seat 3 and sleeved on a piston rod of the damping piston 6, and lubricating grease is coated on a contact area between an inner ring of the spring 7 and the piston rod of the damping piston 6 so as to improve the wear resistance; the upper end of the spring 7 is abutted against the lower end of the nut 5, the lower end of the spring is abutted against the upper end face of the piston head of the damping piston 6 so as to generate elastic force pushing against the inner tube 2, and the end face of the spring 7, which is in contact with the piston head of the damping piston 6, is fixed by strong glue.

The performance of the damper device is closely related to the material properties of each member: the threaded connection seat 3 is made of stainless steel, the nut 5 is made of wear-resistant and fatigue-resistant aluminum bronze alloy, the sleeve 8 is made of wear-resistant, self-lubricating and anti-static polyether-ether-ketone engineering plastic, the spring 7 is made of stainless steel spring wires, the damping piston 6 is made of wear-resistant and heat-resistant high-strength tin bronze alloy, and the sealing ring 9 is made of nitrile rubber. The use of these materials helps to improve the life of the damping device, reduce damage to the inner tube 2, facilitate the discharge of static electricity, and reduce the generation of sparks, thereby ensuring good damping effect and safety.

The installation quantity of the damping device on the gas double-wall pipe is determined according to the requirement and is uniformly distributed at intervals.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The technical scope of the present invention should be defined by the claims of the present invention, and all equivalent changes and modifications made within the scope of the present invention.

Claims (8)

1. A damping device of a gas double-wall pipe is welded on the periphery of the gas double-wall pipe, and the gas double-wall pipe is made of stainless steel and comprises an outer pipe and an inner pipe which are coaxial; the method is characterized in that: the outer tube set up two through-holes that pierce through the pipe wall along diameter direction on the symmetry, damping device includes a pair of shock attenuation support, weld respectively on two through-holes of outer tube, each shock attenuation support includes screw connection seat and damper, the screw connection seat is a pipe fitting, welds sealedly on the through-hole, and the inner wall is equipped with the internal thread, damper through this internal thread fastening connect in the screw connection seat, the lower extreme deepens in the outer tube and with the outer wall top of inner tube is tight, and the damper of a pair of shock attenuation support along diameter direction symmetrical arrangement utilizes elasticity of itself will by relative direction the inner tube is supported to reduce the relative vibration between this inner tube and the outer tube.

2. The gas double-walled pipe damping device according to claim 1, characterized in that: the damping assembly comprises a nut, a damping piston and a spring; the nut through the external screw thread connection of its periphery in on the screw joint seat, inside is equipped with lower extreme open-ended blind hole, damping piston is including the piston rod on upper portion and the piston head of lower part, and the upper end of this piston rod stretches into the blind hole of nut just can slide in this blind hole, the lower terminal surface of piston head support tightly in the outer wall of inner tube, the spring set up in and the cover arranges in the hole of screw joint seat on the piston rod, the upper end top touch in the lower extreme of nut, the lower extreme top touch in the up end of piston head is in order to produce to push away to the elasticity of inner tube.

3. The gas double-walled pipe damping device according to claim 2, characterized in that: the nut is characterized in that a sleeve is arranged between the piston rod and the inner wall of the blind hole of the nut, the sleeve and the blind hole are in interference fit and do not move relatively, the piston rod and the sleeve are in clearance fit, and the piston rod slides in the sleeve.

4. The gas double-walled pipe damping device according to claim 3, characterized in that: the material of screw thread connection seat be the stainless steel, the material of nut is the aluminium bronze alloy, telescopic material is polyether ether ketone engineering plastics, the material of spring is stainless steel spring wire, the material of damping piston is the tin bronze alloy.

5. The gas double-walled pipe shock absorbing device according to claim 2, characterized in that: the joint of the nut and the threaded joint is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

6. The gas double-walled pipe shock absorbing device according to claim 2, characterized in that: the contact position of the lower end of the spring and the piston head is fixed by strong glue.

7. The gas double-walled pipe damping device according to claim 2, characterized in that: and lubricating grease is coated on the contact part of the inner wall of the spring and the piston rod.

8. The gas double-walled pipe damping device according to claim 1, characterized in that: the installation quantity of the damping device on the gas double-wall pipe is determined according to the requirement and is uniformly distributed at intervals.

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