CN211373730U - Flow monitoring system of rapid cooling heat exchanger - Google Patents

Abstract

The utility model discloses a flow monitoring system of rapid cooling heat exchanger, including detector, fiber grating sensor, control panel and display device, the inside of detector is seted up flutedly, the inside left end of recess is inserted and is equipped with the fiber grating sensor, the inside right-hand member of recess is from last to installing control panel and display device down in proper order, two sets of mounting grooves have been seted up at the back of detector, and the bull stick has all been seted up to the inside of two sets of mounting grooves, the inside of bull stick all is inserted and is equipped with the through-hole, the all fixed mounting of inner wall of mounting groove has the mount pad, and the inside fixed mounting of mount pad has the spring, the left end fixed mounting of spring has the inserted bar. The utility model discloses a be provided with fiber grating sensor and display device, can monitor the gas flow in the inside heat exchange tube of rapid cooling heat exchanger, through-hole and inserted bar can conveniently be with detector fixed mounting on the heat exchange tube, easy operation, convenient to use.

Description

Flow monitoring system of rapid cooling heat exchanger

Technical Field

The utility model relates to a detecting system technical field specifically is a flow monitoring system of rapid cooling heat exchanger.

Background

The gas side of the quenching heat exchanger consists of three parts, namely an inlet distributor, a heat exchange tube and an outlet header. After the cracked gas passes through the inlet distributor, the distributor should uniformly distribute the gas into each heat exchange tube, and the normal flow is one path of deceleration (generally <10 m/s) diffusion, so that the kinetic energy of the gas is converted into static pressure as much as possible, and the aim is to reduce the non-uniformity of flow distribution of the gas entering the heat exchange tubes due to the fact that the gas flow velocity at the inlets of the heat exchange tubes is too high and non-uniform and the attack angles of the gas flow at the inlets are not equal. The production process requires that the maximum possible deviation of the general flow rate is less than +/-10 percent, the retention time of the gas in the distributor is reduced as much as possible, and a dead vortex area is avoided, so that the secondary reaction of the cracked gas is inhibited, and the income of ethylene products is ensured.

In order to uniformly distribute cracked gas into a heat exchange tube, the conventional technical means is mainly to design a cracked gas inlet flow channel by adopting a CFD simulation technology during design and arrange a coke-proof baffle in an inlet fluid distributor of a quenching heat exchanger, but the methods belong to passive methods, and whether the flow distribution state during actual operation meets the process requirements needs to be monitored on line, so that a flow monitoring system of the quenching heat exchanger is urgently needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flow monitoring system of rapid cooling heat exchanger to solve the heat exchange tube entrance that proposes in the above-mentioned background art because the gas flow velocity is too high and inhomogeneous and the entrance air current attack angle is unequal and cause the problem of the flow distribution inhomogeneity of gaseous entering heat exchange tube.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a flow monitoring system of rapid cooling heat exchanger, includes detector, fiber grating sensor, control panel and display device, the recess has been seted up to the inside of detector, the inside left end of recess is inserted and is equipped with the fiber grating sensor, the inside right-hand member of recess is from last to installing control panel and display device down in proper order, two sets of mounting grooves have been seted up at the back of detector, and the bull stick has all been seted up to the inside of two sets of mounting grooves, the inside of bull stick all is inserted and is equipped with the through-hole, the inner wall of mounting groove all fixed mounting have the mount pad, and the inside fixed mounting of mount pad has the spring, the left end fixed mounting of spring has the inserted bar, the one end fixed mounting that the.

Preferably, the fiber grating sensor comprises a fiber core, a cladding and a coating layer, wherein the cladding is sleeved on the outer wall of the fiber core, and the coating layer is sleeved on the outer wall of the cladding.

Preferably, the fiber grating sensors are provided with two groups, and the two groups of fiber grating sensors penetrate through the inner wall of the groove and respectively extend to the inner parts of the two groups of mounting grooves.

Preferably, the output end of the fiber grating sensor is electrically connected with the input end of the control panel, and the output end of the control panel is electrically connected with the input end of the display device.

Preferably, the outer wall of the through hole is provided with an external thread, the inside of the rotating rod is provided with an internal thread, and the rotating rod is in threaded connection with the through hole.

Preferably, one end of the spring is fixedly welded with the mounting seat, the other end of the spring is fixedly welded with the inserted link, and the spring and the inserted link form an elastic structure.

Compared with the prior art, the beneficial effects of the utility model are that: this flow monitoring system of rapid cooling heat exchanger is provided with fiber grating sensor and display device, can monitor the gas flow in the inside heat exchange tube of rapid cooling heat exchanger, and through-hole and inserted bar can conveniently be with detector fixed mounting on the heat exchange tube, easy operation, convenient to use.

1. The device is provided with fiber grating sensor and display device, the inside liquid of mounting groove and gas are indirect and the contact takes place for the fiber grating sensor, drive the fiber grating sensor afterwards and take place deformation, and then make the reflection wave wavelength of fiber grating sensor change, the size that can calculate external velocity of flow through the size that detects the change of fiber grating sensor reflection wave wavelength, and then record the size of flow, afterwards with data transfer to control panel on, control panel shows on with data transfer to display device, make things convenient for people to watch, detect the inside gas flow of heat transfer pipe simultaneously, make the entry air current attack angle equal, make the flow distribution of gaseous entering heat exchange pipe more even simultaneously.

2. The device is provided with through-hole and inserted bar, install the detector on the heat exchange tube, the outer wall of heat exchange tube extrudees the extrusion piece afterwards, the extrusion piece extrudees the inserted bar, the inserted bar drives the spring and extrudees, can make the inserted bar shrink, rotate the through-hole afterwards, it removes to drive the through-hole through helicitic texture, can make the through-hole extrude fixedly to the outer wall of heat exchange tube, cooperation extrusion piece and inserted bar can be fixed the detector on the heat exchange tube, make things convenient for the work of detector, and is simple in operation, high durability and convenient use.

Drawings

Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;

fig. 2 is a schematic side view of the cross-sectional structure of the present invention;

fig. 3 is an enlarged schematic view of a portion a of fig. 2 according to the present invention;

FIG. 4 is a schematic view of a sub-part of an optical fiber according to the present invention;

fig. 5 is a schematic view of the fiber grating of the present invention.

In the figure: 1. a detector; 2. a groove; 3. a fiber grating sensor; 31. a fiber core; 32. a cladding layer; 33. a coating layer; 4. a control panel; 5. a display device; 6. mounting grooves; 7. a rotating rod; 8. a through hole; 9. a mounting seat; 10. a spring; 11. inserting a rod; 12. and extruding the block.

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.

Referring to fig. 1-5, the present invention provides an embodiment:

a flow monitoring system of a rapid cooling heat exchanger comprises a detector 1, a fiber grating sensor 3, a control panel 4 and a display device 5, wherein the type of the fiber grating sensor 3 can be GS-WD-I, the type of the control panel 4 can be CJ-1, the type of the display device 5 can be HYWEI1602-1, a groove 2 is formed in the detector 1, the fiber grating sensor 3 is inserted at the left end of the inner part of the groove 2, the fiber grating sensor 3 comprises a fiber core 31, a cladding 32 and a coating layer 33, the cladding 32 is sleeved on the outer wall of the fiber core 31, the coating layer 33 is sleeved on the outer wall of the cladding 32, the fiber is divided into the fiber core 31, the cladding 32 and the coating layer 33 from inside to outside in the radial direction, the fiber core 31 at a specific part is subjected to ultraviolet irradiation by using a special ultraviolet irradiation process, so that the refractive index of the fiber core 31 in the region is periodically changed, the fiber grating with the specific central wavelength can be manufactured, the period and the effective refractive index of the fiber grating can be changed by stretching and compressing the fiber grating or changing the temperature, so that the purpose of changing the reflection wavelength of the fiber grating is achieved, the gas flow in the heat exchange tube is detected, and the use is convenient.

The fiber grating sensor 3 is provided with two sets ofly, and two sets of fiber grating sensor 3 run through the inner wall of recess 2 and extend to the inside of two sets of mounting grooves 6 respectively, and when the inside gas of heat exchange tube flows, take place indirect contact through pipe wall and fiber grating sensor 3, change fiber grating sensor 3's reflection wave wavelength afterwards, can detect gas flow's size, easy operation, convenient to use.

The output of fiber grating sensor 3 and control panel 4's input electric connection, control panel 4's output is connected with display device 5's input electricity, and fiber grating sensor 3 is with the data transfer that detects to control panel 4 on, control panel 4 shows on transmitting display device 5 with numerical value afterwards, can make things convenient for people to directly watch convenient to use.

Recess 2's inside right-hand member is from last to installing control panel 4 and display device 5 down in proper order, two sets of mounting grooves 6 have been seted up at detector 1's the back, and bull stick 7 has all been seted up to the inside of two sets of mounting grooves 6, bull stick 7's inside is all inserted and is equipped with through-hole 8, through-hole 8's outer wall is provided with the external screw thread, bull stick 7's inside is provided with the internal thread, bull stick 7 and through-hole 8 threaded connection, rotate through-hole 8, can make through-hole 8 remove on bull stick 7 through helicitic texture, can make through-hole 8 extrude the outer wall of heat transfer pipe afterwards, the installation of heat transfer pipe is fixed in the convenient.

The inner wall of mounting groove 6 all fixed mounting have mount pad 9, and the inside fixed mounting of mount pad 9 has spring 10, the left end fixed mounting of spring 10 has inserted bar 11, the one end fixed mounting that spring 10 was kept away from to inserted bar 11 has extrusion block 12, the one end and the mount pad 9 fixed welding of spring 10, the other end and the 11 fixed welding of inserted bar of spring 10, spring 10 constitutes elastic construction with inserted bar 11, install the heat exchange tube in the inside of mounting groove 6, the outer wall of heat exchange tube extrudes extrusion block 12 at any time, extrusion block 12 extrudees inserted bar 11, inserted bar 11 drives spring 10 and extrudees, can make the shrink of inserted bar 11, can make the heat exchange tube laminate more and extrusion block 12, cooperate through-hole 8 to fix the heat exchange tube simultaneously, the difficult condition that breaks away from, high durability and convenient use.

The working principle is as follows: during the use, install detector 1 on the heat exchange tube, the outer wall of heat exchange tube extrudees extrusion piece 12 afterwards, extrusion piece 12 extrudees inserted bar 11, inserted bar 11 drives spring 10 and extrudees, can make inserted bar 11 shrink, rotate through-hole 8 afterwards, it removes to drive through-hole 8 through helicitic texture, can make through-hole 8 extrude fixedly to the outer wall of heat exchange tube, cooperation extrusion piece 12 and inserted bar 11 can be fixed detector 1 on the heat exchange tube, make things convenient for detector 1's work, and is simple in operation and convenient to use.

The liquid and the gas inside the mounting groove 6 indirectly contact with the fiber grating sensor 3, then it takes place deformation to drive the fiber grating sensor 3, and then make the reflection wave wavelength of the fiber grating sensor 3 change, the change of reflection wave wavelength is linear relation with the change of ambient temperature or meeting an emergency, the size of external velocity of flow can be calculated to the size that changes through detecting the 3 reflection wave wavelengths of fiber grating sensor, and then measure the size of flow, later with data transfer to control panel 4 on, control panel 4 shows on data transfer 5, make things convenient for people to watch, detect the gas flow to the inside of heat exchange tube simultaneously, make the entry air current attack angle equal, make the flow distribution of gas entering heat exchange tube more even simultaneously.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a flow monitoring system of rapid cooling heat exchanger, includes detector (1), fiber grating sensor (3), control panel (4) and display device (5), its characterized in that: the inside of detector (1) is seted up flutedly (2), the inside left end of recess (2) is inserted and is equipped with fiber grating sensor (3), the inside right-hand member of recess (2) is from last to installing control panel (4) and display device (5) down in proper order, two sets of mounting groove (6) have been seted up at the back of detector (1), and the inside of two sets of mounting groove (6) has all been seted up bull stick (7), the inside of bull stick (7) is all inserted and is equipped with through-hole (8), the inner wall of mounting groove (6) is fixed mounting all has mount pad (9), and the inside fixed mounting of mount pad (9) has spring (10), the left end fixed mounting of spring (10) has inserted bar (11), the one end fixed mounting that spring (10) were kept away from in inserted bar (11) has extrusion piece (12).

2. A flow monitoring system for a quench heat exchanger as claimed in claim 1, wherein: the fiber bragg grating sensor (3) comprises a fiber core (31), a cladding (32) and a coating layer (33), wherein the cladding (32) is sleeved on the outer wall of the fiber core (31), and the coating layer (33) is sleeved on the outer wall of the cladding (32).

3. A flow monitoring system for a quench heat exchanger as claimed in claim 1, wherein: the fiber grating sensors (3) are provided with two groups, and the inner walls of the two groups of fiber grating sensors (3) penetrating through the grooves (2) respectively extend to the insides of the two groups of mounting grooves (6).

4. A flow monitoring system for a quench heat exchanger as claimed in claim 1, wherein: the output end of the fiber bragg grating sensor (3) is electrically connected with the input end of the control panel (4), and the output end of the control panel (4) is electrically connected with the input end of the display device (5).

5. A flow monitoring system for a quench heat exchanger as claimed in claim 1, wherein: the outer wall of through-hole (8) is provided with the external screw thread, the inside of bull stick (7) is provided with the internal thread, bull stick (7) and through-hole (8) threaded connection.

6. A flow monitoring system for a quench heat exchanger as claimed in claim 1, wherein: one end of the spring (10) is fixedly welded with the mounting seat (9), the other end of the spring (10) is fixedly welded with the inserted link (11), and the spring (10) and the inserted link (11) form an elastic structure.

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