CN212779811U

CN212779811U - Non-pressure-tight heat exchange tube pressure testing device

Info

Publication number: CN212779811U
Application number: CN202021592348.1U
Authority: CN
Inventors: 张怡
Original assignee: Guizhou Aerospace Wujiang Electro Mechanical Equipment Co Ltd
Current assignee: Guizhou Aerospace Wujiang Electro Mechanical Equipment Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-23
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a non-pressuring heat exchange tube pressure testing device, including drain valve and shell, the shell have two and symmetry to set up, fixedly connected with fixture block on the external diameter of shell, set up the limbers with the inner chamber intercommunication in the one end of every shell, and the shell has the one end of limbers to be connected with the drain valve, be provided with the support ring in the shell, and the outer wall of support ring and the inner wall clearance fit of shell, seted up sealed slot on the internal diameter of support ring and terminal surface, install the sealing washer at sealed slot, there is tensioning nut at shell other end threaded connection, and tensioning nut's tip is pressed on the support ring. The utility model provides an adopt the welding closure plate easily to cause the heat exchange tube to shorten, large heat exchanger equipment production efficiency is low to and adopt roof pressure-when compressing tightly the external diameter pressure testing pipe easily atress warp, the checkpost at centre and both ends easily flattens the heat exchange tube, influences the problem of equipment.

Description

Non-pressure-tight heat exchange tube pressure testing device

Technical Field

The utility model relates to a non-pressure tight heat exchange tube pressure testing device belongs to metal system shell and tube heat exchanger and builds technical field.

Background

A heat exchanger, also called a heat exchanger or a heat exchange device, is a device that transfers part of the heat of a hot fluid to a cold fluid. The heat exchanger is a general device in chemical industry, petroleum industry, power industry, food industry and other industrial departments, and plays an important role in production. The heat exchanger can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in chemical production, and is widely applied.

Heat exchangers are of many kinds, but basically three main categories can be distinguished according to the principle and mode of heat exchange between cold and hot fluids: namely, the dividing wall type, the hybrid type and the heat storage type, and among the three types of heat exchangers, the dividing wall type heat exchanger is most widely used. At present, a condenser, a reboiler, a separation heater, an extraction heater and the like of the existing heat exchanger are all of a dividing wall type, the structure of the existing heat exchanger mainly comprises a heat exchange tube, a shell, a flange, a tube plate and the like, and the structure is a great technical difficulty for pressure test of the heat exchange tube. Workers have used two methods to test pressure: the first method is to weld the blocking plates at the two ends of the heat exchange tube directly, which wastes time and material, and when the blocking plates are cut off, the heat exchange tube is easy to be shortened, the diameter of the equipment is large, the equipment with a large number of heat exchange tubes is very inconvenient, and the production progress is influenced; the second method is a top pressing-outer diameter pressing method, the heat exchange tube is sealed by a top pressing bolt, but the tube is easy to deform under stress when the heat exchange tube is pressed, and the heat exchange tube is easy to flatten by clips arranged in the middle and at two ends, so that the assembly of the equipment is influenced. In view of the defects of the two methods, it is particularly important to design a pressure testing device for the non-pressure heat exchange tube.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the pressure testing device solves the series problems that the tube is easy to deform under stress, the two ends of the tube are flattened, the heat exchange tube is shortened to influence equipment assembly and the like during pressure testing of the existing heat exchange tube of the heat exchanger, the production efficiency is improved by tens of times, the pressure testing device is not limited by the diameter of the heat exchange tube and the material, can be used for carrying out pressure testing on a single tube and simultaneously carrying out tests on multiple tubes, and can be used for inserting two ends of a U-shaped tube simultaneously, so that the operation is more convenient.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a non-pressure tight heat exchange tube pressure testing device, includes drain valve and shell, the shell have two and symmetry to set up, fixedly connected with fixture block on the external diameter of shell, the limbers with the inner chamber intercommunication is seted up to the one end of every shell, and the shell has the one end and the drain valve of limbers to be connected, be provided with the support ring in the shell, and the outer wall of support ring and the inner wall clearance fit of shell, sealed slot has been seted up on the internal diameter and the terminal surface of support ring, install the sealing washer in sealed slot, there is taut nut at shell other end threaded connection, and the tip of taut nut is pressed on the support ring.

Furthermore, a clamping groove is formed in the outer diameter of the shell, and a clamping block is fixedly connected in the clamping groove.

Further, a pressure gauge is connected in series between the drain valve and the shell.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is: the utility model discloses a special combination of shell, nut, fixture block, support ring and sealing washer utilizes the high swelling nature that rubber has, makes up into one with several parts above can seal, safe and reliable and make things convenient for the non-pressure tight heat exchange tube pressure testing device of dismouting again. The problems that the heat exchange tube is shortened easily due to the adoption of a welding blocking plate, the production efficiency of large-scale heat exchanger equipment is low, the tube is easy to stress and deform when a pressure test with a top pressure and a pressing outer diameter is adopted, and the heat exchange tube is easy to flatten by clips in the middle and at two ends, so that the equipment assembly is influenced are solved. The utility model discloses satisfy heat exchanger's production needs, improved product quality and production efficiency.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a partially enlarged view of fig. 1.

Description of reference numerals: 1-a drain valve, 2-a shell, 3-a fixture block, 4-a tensioning nut, 5-a support ring, 6-a sealing ring, 7-a pressure gauge and 8-a detected tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 and fig. 2, the utility model discloses a non-pressure tight heat exchange tube pressure testing device, including drain valve 1 and shell 2, shell 2 have two and symmetry to set up, the draw-in groove has been seted up on the external diameter of shell 2, fixedly connected with fixture block 3 in the draw-in groove, the limbers with the inner chamber intercommunication is seted up to the one end of every shell 2, and shell 2 has the one end of limbers to be connected with drain valve 1, be provided with support ring 5 in shell 2, and the outer wall of support ring 5 and the inner wall clearance fit of shell 2, sealed slot has been seted up on the internal diameter of support ring 5 and terminal surface, install sealing washer 6 in sealed slot, there is tensioning nut 4 at shell 2 other end threaded connection, and tensioning nut 4's tip is pressed on support ring 5. And a pressure gauge 7 is connected in series between the drain valve 1 and the shell 2.

In specific implementation, the support ring 5 is made of S30408 high-alloy austenitic stainless steel material, has strong corrosion resistance and meets the requirement of long-term use of the device. The shell 2 is made of 40Cr steel, the surface of the shell is blackened, the tensile strength is larger than or equal to 805Mp, the yield strength is larger than or equal to 685Mp, the elongation is larger than or equal to 14, the impact energy at 0 ℃ is larger than or equal to 41J, the shell belongs to low-temperature alloy, the strength is high, the mechanical performance is good, even if certain internal pressure is met in the pressurizing process, threads are not prone to deformation, and the situation that sealing pretightening force is not enough is avoided. The tensioning nut 4 is treated with a steel 45 surface blackening treatment, which is less hard than the housing 2, so that the threads are not damaged when the tensioning nut 4 is screwed. The sealing ring 6 is made of industrial polyurethane rubber, is low in price and high in plasticity, is convenient to purchase, and in the using process, once the sealing ring is subjected to the force transmitted to the support ring 5 by the tensioning nut 4, the pipe wall of the detected pipe 8 is subjected to internal pressure under the action of water, the diameter of the detected pipe 8 is expanded and increased immediately to be sealed, and once the internal pressure is eliminated, the original shape is restored quickly to facilitate the extraction of the detected pipe 8.

The utility model discloses a theory of operation:

when in use, the inner surface and the outer surface of the detected tube 8 are cleaned, and no impurities such as oil stains and the like exist. The support ring 5 and the tensioning nut 4 are sequentially installed in the shell 2, then the clamping block 3 on the shell 2 is axially positioned, and the pressure testing device is fixed on the platform by adopting a clamping block fixing bolt and is inserted into the detected tube 8. The tightening nut 4 is rotated, the support ring 5 and the sealing ring 6 are fastened through the interaction force of the tightening nut 4 and the threads on the shell 2, then high-pressure water is introduced, and the sealing ring 6 and the detected pipe 8 are expanded under the pressure action of the water, so that the sealing purpose is achieved. During the pressure testing, turn on the water pump and fill water, after the index of manometer 7 rose to the regulation water pressure value, close drain valve 1, pressurize certain time, if the pipe 8 that is examined does not have the leakage, open drain valve 1 pressure release, then loosen taut nut 4 and take out the pipe 8 that is examined, carry out the test next time.

Therefore, the utility model has the advantages of simple appearance structure, low manufacturing cost, convenient operation, safety, reliability, environmental protection and sanitation. Production and use verification through multiple heat exchanger devices adopts a non-pressure tight heat exchange tube pressure test device for pressure test, the production efficiency is improved by dozens of times, the inspected tube 8 has no damage, and the pressure test device can completely meet the requirement of manufacturing the heat exchanger with the structure.

Claims

1. The utility model provides a non-pressure tight heat exchange tube pressure testing device, includes drain valve (1) and shell (2), its characterized in that: shell (2) have two and the symmetry setting, fixedly connected with fixture block (3) on the external diameter of shell (2), the limbers with the inner chamber intercommunication are seted up to the one end of every shell (2), and shell (2) have the one end of limbers to be connected with drain valve (1), be provided with support ring (5) in shell (2), and the outer wall of support ring (5) and the inner wall clearance fit of shell (2), sealed slot has been seted up on the internal diameter and the terminal surface of support ring (5), install sealing washer (6) in sealed slot, there is tensioning nut (4) at shell (2) other end threaded connection, and the tip pressure of tensioning nut (4) is on support ring (5).

2. The pressureless heat exchange tube pressure testing device according to claim 1, characterized in that: the outer diameter of the shell (2) is provided with a clamping groove, and a clamping block (3) is fixedly connected in the clamping groove.

3. The pressureless heat exchange tube pressure testing device according to claim 1, characterized in that: and a pressure gauge (7) is connected in series between the drain valve (1) and the shell (2).