CN110567295B

CN110567295B - Heating net heater

Info

Publication number: CN110567295B
Application number: CN201910840175.6A
Authority: CN
Inventors: 张绍庭; 张爱军; 刘青林; 赵至蓬; 李帅; 赵士栋
Original assignee: Shandong Shunye Pressure Vessel Co ltd
Current assignee: Shandong Shunye Pressure Vessel Co ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2021-03-26
Anticipated expiration: 2039-09-06
Also published as: CN110567295A

Abstract

The invention relates to a heating network heater, which comprises a shell, a front end pipe box and a rear end pipe box, wherein the front end pipe box and the rear end pipe box are arranged at two ends of the shell, a pipe bundle is arranged in the shell, a partition plate is arranged in the front end pipe box along the axis of the shell and is divided into an upper water inlet cavity and a lower water outlet cavity, the upper end of the water inlet cavity is communicated with a water inlet pipe connecting pipe, the lower end of the water outlet cavity is communicated with a water outlet pipe connecting pipe, the upper end of the shell is provided with; a filter screen is arranged in the water inlet pipe connecting pipe, the filter screen is in a cylindrical shape with an opening at the upper end, the upper end of the filter screen is rotatably connected in the water inlet pipe connecting pipe, and the lower end of the filter screen extends into the water inlet cavity; and a driving piece for driving the filter screen to rotate is arranged in the water inlet pipe connecting pipe. The invention has the effects of filtering the water medium, reducing impurities entering the tube bundle, reducing the blockage and scaling probability of the tube bundle, further reducing the cleaning times, being beneficial to ensuring the utilization efficiency of the heater to the maximum extent and improving the production efficiency.

Description

Heating net heater

Technical Field

The invention relates to the technical field of boiler heat supply, in particular to a heating network heater.

Background

At present, a heat supply network heater is a key device of a heat supply network system, is one of main auxiliary devices of a thermal power plant, and has a main function of heating circulating water in a hot water supply system by using extraction steam of a steam turbine or steam (heating medium) introduced from a boiler so as to meet requirements of heat supply users.

The conventional bulletin is CN103868379B, which discloses a hot-mixing type heat supply network heater, comprising a left tube box and a right tube box, a tube plate shell arranged between the left tube box and the right tube box is welded, and a tube bundle arranged in the tube plate shell is welded, wherein the tube bundle is divided into three areas, namely a low-resistance area close to the upper end and the lower end of the shell, a high-resistance area close to the central line of the tube bundle, and a transition area arranged between the high-resistance area and the low-resistance area, and the three areas are vertically and symmetrically arranged relative to the X axis of a horizontal central line.

The above prior art solutions have the following drawbacks: because the return water of the heat supply network contains impurities such as metal oxides, crushed gravels or silt, when the water flow flows in the tube bundle, the impurities can cause the tube bundle to be blocked; furthermore, due to the high-temperature heat exchange of the steam, impurities deteriorate the water quality, so that the inner wall of the tube bundle is easy to scale, and the heat exchange efficiency is reduced; when the tube bundle is blocked or scales are too much, the operation of the heater needs to be stopped, and the tube bundle is cleaned by adopting special cleaning equipment, so that the effective utilization time of the heater is reduced, and the hot water production efficiency is inevitably influenced.

Disclosure of Invention

The invention aims to provide a heating network heater, which has the effects of filtering a water medium, reducing impurities entering a tube bundle, reducing the blockage and scaling probability of the tube bundle, further reducing the cleaning times, being beneficial to ensuring the utilization efficiency of the heater to the maximum extent and improving the production efficiency.

The above object of the present invention is achieved by the following technical solutions:

a heat supply network heater comprises a shell, a front end pipe box and a rear end pipe box, wherein the front end pipe box and the rear end pipe box are arranged at two ends of the shell, a pipe bundle is arranged in the shell, a partition plate is arranged in the front end pipe box along the axis of the shell and is divided into an upper water inlet cavity and a lower water outlet cavity, the upper end of the water inlet cavity is communicated with a water inlet pipe connecting pipe, the lower end of the water outlet cavity is communicated with a water outlet pipe connecting pipe, the upper end of the shell is provided with a; a filter screen is arranged in the water inlet pipe connecting pipe, the filter screen is in a cylindrical shape with an opening at the upper end, the upper end of the filter screen is rotatably connected in the water inlet pipe connecting pipe, and the lower end of the filter screen extends into the water inlet cavity; and a driving piece for driving the filter screen to rotate is arranged in the water inlet pipe connecting pipe.

By adopting the technical scheme, the steam pipeline is connected with the steam inlet connecting pipe, the drain pipeline is communicated with the drain outlet connecting pipe, the water inlet pipe is connected with the water inlet pipe connecting pipe, the water outlet pipe is communicated with the water outlet pipe connecting pipe, the external water medium enters the water inlet cavity and then enters the pipe bundle, meanwhile, the steam enters the shell, when the water medium flows through the pipe bundle, the water medium exchanges heat with high-temperature steam, the heating of the water medium is realized, the heated water medium is conveyed to a heat supply network user through the water outlet cavity and the water outlet pipe, and the steam is condensed into water after exchanging heat with the water medium and then is discharged from the drain pipe;

in the heat exchange process, the filter screen is arranged in the water inlet pipe connecting pipe and is cylindrical, so that the water medium can be filtered by the filter screen before entering the water inlet cavity, most impurities in the water medium are left in the filter screen, and the impurities in the water medium entering the pipe bundle are greatly reduced, so that the blockage and scaling probability of the pipe bundle can be reduced, the cleaning times are reduced, the working time of the heater is ensured to the maximum extent, and the effect of improving the production efficiency is achieved;

the lower end of the filter screen extends into the water inlet cavity, so that the area of the filter screen can be enlarged, the filtering effect on the water medium is improved, the flowing speed of the water medium is ensured, and the amount of the water medium flowing into the water inlet cavity is ensured;

in the above-mentioned in-process, because the impurity of separation can depend on the mesh department of filter screen under the effect that aqueous medium flows in the filter screen, influence follow-up aqueous medium's the flow effect, the event utilizes the driving piece that sets up in the inlet tube takeover to order about the filter screen, makes its filter screen in the filtering process to aqueous medium, takes place the rotation, makes its impurity be difficult for depending on in the mesh, when making its filter screen guarantee to aqueous medium filtration work, reduces the influence to aqueous medium circulation speed.

The invention is further configured to: the driving part comprises a support frame arranged at an opening at the upper end of the filter screen and a helical blade which is connected with the support frame and is coaxially arranged with the filter screen.

Through adopting above-mentioned technical scheme, utilize the support frame to realize being connected of filter screen and helical blade, carry the in-process to the intake antrum from the inlet tube when aqueous medium, the aqueous medium plays the impact to helical blade, makes its helical blade take place to rotate, and then drives the filter screen through the support frame and takes place the rotation, makes the in-process that it intake, and the filter screen is in the rotation work always when realizing to aqueous medium filterable, makes its impurity be difficult to depend on in the mesh, influences aqueous medium's flow speed.

The invention is further configured to: the filter screen upper end is seted up along filter screen axis parallel arrangement's slot, the support frame is pegged graft in the slot.

By adopting the technical scheme, the supporting frame can be inserted into the insertion groove from top to bottom by utilizing the insertion groove formed in the upper end of the filter screen, so that the supporting frame is connected with the filter screen, the circumferential rotation of the supporting frame relative to the filter screen is limited, and the supporting frame is driven to drive the filter screen to rotate when the helical blade rotates; meanwhile, the support frame and the inserting groove are inserted and connected, so that the support frame and the spiral blade can be easily separated from the filter screen, the subsequent cleaning of impurities in the filter screen is facilitated, or the spiral blade can be conveniently replaced when damaged.

The invention is further configured to: a rotating shaft which is coaxial with the helical blade is fixed at the lower end of the support frame, and a stirring blade which is coaxial with the rotating shaft is also arranged in the filter screen; and a gear transmission mechanism for driving the stirring blades to rotate reversely is arranged at the lower end of the rotating shaft.

Through adopting above-mentioned technical scheme, utilize the gear drive who sets up at the axis of rotation lower extreme, realize stirring vane's antiport work, make its aqueous medium get into the intake antrum in-process, order about the filter screen corotation in, stirring vane is reversal work to carry out the vortex to the aqueous medium in the filter screen, make the impurity that its separation is difficult to more depend on in the mesh of filter screen, further reduce the probability that impurity blockked up the mesh, reach the effect that improves aqueous medium flow rate.

The invention is further configured to: the gear transmission mechanism comprises a sun gear, a gear ring and a plurality of groups of planet gears, and the plurality of groups of planet gears are uniformly arranged along the circumferential direction of the sun gear and are simultaneously meshed with the sun gear and the gear ring; the sun gear is coaxially fixed with the rotating shaft, a limiting frame is arranged on the rotating shaft, the multiple groups of planetary gears and the gear ring are rotatably connected to the limiting frame, and the stirring blades are fixed at the lower end of the gear ring.

Through adopting above-mentioned technical scheme, utilize spacing to realize the spacing work to planetary gear and ring gear, make its planetary gear and gear only can spacing rotation relatively, and then because sun gear and axis of rotation are fixed, when the support frame rotates, can order about sun gear and do rotation work thereupon, and then drive the planetary gear rotation, at planetary gear and the meshing effect of ring gear, order about the relative spacing rotation work of doing with the axis of rotation of ring gear to the realization drives stirring vane's rotation work.

The invention is further configured to: the spacing includes that many correspond the gag lever post that every group planetary gear set up respectively, gag lever post one end is fixed with the axis of rotation lateral wall, and the other end is fixed with L type pole, L type pole and gag lever post form the recess that supplies the ring gear to peg graft.

By adopting the technical scheme, the gear ring is inserted and connected by utilizing the groove formed between the L-shaped rod and the limiting rod, so that the gear ring is only axially limited, and the gear ring can automatically rotate relative to the limiting frame; meanwhile, each group of planet gears can be conveniently and rotatably connected to the corresponding limiting rod;

furthermore, as the limiting frame is composed of a plurality of groups of limiting rods, gaps can be left between the limiting rods, so that the blocking effect on the aqueous medium can be reduced, and the circulation of the aqueous medium is facilitated.

The invention is further configured to: the outer wall of the upper end of the filter screen is fixed with a limiting ring, and the upper end of the water inlet pipe connecting pipe is provided with a limiting groove for the limiting ring to be inserted from top to bottom.

By adopting the technical scheme, the limiting groove formed in the upper end of the water inlet pipe connecting pipe is used for inserting the limiting ring at the upper end of the filter screen, so that the filter screen is supported, and the filter screen rotates relative to the water inlet pipe connecting pipe; and then can make things convenient for the dismouting work of filter screen relative inlet tube takeover, be convenient for take out the filter screen and carry out impurity clearance.

The invention is further configured to: the outer side wall and the lower end of the limiting ring are respectively embedded with a plurality of balls, and the balls are in rolling contact with the inner wall of the limiting groove.

Through adopting above-mentioned technical scheme, utilize spacing ring lateral wall and lower extreme to inlay the ball of establishing respectively, it contradicts with the inner wall roll of spacing groove, frictional force between reducible spacing ring and the spacing groove, the rotation work of the relative inlet tube takeover of filter screen of being convenient for.

The invention is further configured to: the filter screen is arranged in a round table shape with a large upper part and a small lower part.

By adopting the technical scheme, the filter screen is arranged in a round table shape with a large upper part and a small lower part, so that the friction force between the filter screen and the water inlet pipe connecting pipe can be reduced, and the filter screen can rotate relative to the water inlet pipe connecting pipe conveniently; meanwhile, the side wall of the filter screen is obliquely arranged, when the water medium circulates from top to bottom, the water medium can rapidly pass through the filter screen under the action of gravity on one hand, and the water medium plays a role in washing the inner side wall of the filter screen on the other hand, so that the medium is not easy to block meshes.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the filter screen arranged in the water inlet pipe connecting pipe is utilized to filter the water medium before entering the pipe bundle, so that impurities in the water medium are separated, and the impurities in the water medium entering the pipe bundle are greatly reduced, thereby reducing the blocking and scaling probability of the pipe bundle, further reducing the cleaning times, being beneficial to ensuring the working time of the heater to the maximum extent and achieving the effect of improving the production efficiency;

2. the connection between the helical blade and the filter screen is realized by utilizing the support frame, so that the helical blade is driven to rotate in the process of circulating the aqueous medium, the filter screen is driven to rotate, the impurities are not easy to block the meshes of the filter screen, and the influence on the circulation speed of the aqueous medium is reduced as much as possible;

3. utilize gear drive to realize being connected of axis of rotation and stirring vane, and make its filter screen pivoted in-process, stirring vane carries out the antiport, makes its stirring vane carry out the vortex to the aqueous medium in the filter screen, makes the impurity that its separation is difficult to more depend on in the mesh of filter screen, further reduces the probability that impurity blockked up the mesh, reaches the effect that improves aqueous medium flow speed.

Drawings

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

Fig. 2 is a partial cross-sectional schematic view of fig. 1.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is a schematic view of a partial structure of the water inlet pipe adapter and the filter screen in fig. 2.

Fig. 5 is a partial schematic view of the gear assembly of fig. 4.

In the figure, 1, a housing; 2. a front end channel box; 3. a rear end manifold box; 4. a tube bundle; 5. a tube sheet; 6. a partition plate; 7. a water inlet cavity; 8. a water outlet cavity; 9. a water inlet pipe is connected with a pipe; 10. a water outlet pipe is connected with a pipe; 11. a steam inlet connection pipe; 12. a drain outlet connection pipe; 13. a filter screen; 14. a limiting ring; 15. a limiting groove; 16. a ball bearing; 17. a support frame; 18. a slot; 19. a rotating shaft; 20. a helical blade; 21. a stirring blade; 22. a limiting frame; 221. a limiting rod; 222. an L-shaped rod; 23. a sun gear; 24. a planetary gear; 25. a ring gear; 26. and a connecting frame.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the heat supply network heater disclosed by the invention comprises a hollow shell 1, wherein the shell 1 is cylindrical; a front pipe box 2 and a rear pipe box 3 are respectively fixed at two ends of the shell 1; tube plates 5 are respectively fixed at two ends of the shell 1 to isolate the shell 1 from the inner spaces of the front tube box 2 and the rear tube box 3; the shell 1 is also internally provided with a tube bundle 4, and the tube bundle 4 is arranged in a U shape, penetrates through the two tube plates 5 and is welded and fixed on the two tube plates 5; wherein the open ends of the tube bundles 4 are all located in the front end tube box 2. A partition plate 6 is fixed in the front-end tube box 2 along the axis of the shell 1, the partition plate 6 is fixed with the inner wall of the front-end tube box 2 and the tube plate 5, and the front-end tube box 2 is divided into an upper water inlet cavity 7 and a lower water outlet cavity 8; the upper end of the water inlet cavity 7 is communicated with a water inlet pipe connecting pipe 9, and the lower end of the water outlet cavity 8 is communicated with a water outlet pipe connecting pipe 10; the upper end of the shell 1 is communicated with a steam inlet connecting pipe 11, and the lower end of the shell 1 is communicated with a drainage outlet connecting pipe 12. The water inlet strand connecting pipe is used for being connected with a water inlet pipe, the water outlet pipe connecting pipe 10 is used for being connected with a water outlet pipe, the steam inlet connecting pipe 11 is used for being connected with a steam pipe, and the drain outlet connecting pipe 12 is used for being connected with a drain pipe; when the water medium enters the tube bundle 4 from the water inlet cavity 7, the steam enters the shell 1 to heat the water medium in the tube bundle 4, the heated water medium is discharged through the water outlet pipe, and the steam is condensed into water and is discharged from the drain pipe.

Referring to fig. 2 and 3, a filter screen 13 is further arranged in the water inlet pipe adapter 9, an opening is formed in the upper end of the filter screen 13, the filter screen is arranged in a circular truncated cone shape with a large upper part and a small lower part, and the lower end of the filter screen 13 extends into the water inlet cavity 7; filter screen 13 and inlet tube take-over 9 coaxial arrangement, and filter screen 13 upper end outer wall welded fastening has a round spacing ring 14, and inlet tube take-over 9 upper end has been seted up a round spacing groove 15, and spacing groove 15 and inlet tube take-over 9 up end intercommunication can supply filter screen 13 from last to pegging graft in spacing groove 15 down. In this embodiment, a plurality of balls 16 are respectively embedded in the outer side wall and the lower end of the limiting ring 14, and the balls 16 respectively contact with the side walls of the limiting grooves 15 in a rolling manner. When the water inlet pipe is arranged on the water inlet pipe connecting pipe 9, the lower end of the water inlet pipe is abutted against the limiting ring 14, and the inner wall of the water inlet pipe is flush with the outer wall of the filter screen 13, so that the filter screen 13 can only rotate circumferentially relative to the water inlet pipe connecting pipe 9, and the up-and-down displacement work of the filter screen 13 is limited.

Referring to fig. 4, three groups of slots 18 are formed in the upper end of the filter screen 13 along the circumferential direction thereof, and the upper ends of the slots 18 are communicated with the upper end surface of the filter screen 13; the filter screen 13 is further provided with a support frame 17, three support legs of the support frame 17 are respectively inserted into the corresponding slots 18, a helical blade 20 is fixed on the support frame 17 through a rotating shaft 19, the rotating shaft 19 and the filter screen 13 are coaxially arranged, and the helical blade 20 is positioned above the support frame 17; when the water medium flows downwards, the helical blade 20 is driven to drive the filter screen 13 to do circumferential rotation work.

One end of the rotating shaft 19 extends to the lower end of the supporting frame 17, a stirring blade 21 is further arranged in the filter screen 13, and a stirring shaft of the stirring blade 21 is coaxially arranged with the rotating shaft 19 and is connected with the rotating shaft 19 through a gear transmission mechanism, so that the stirring blade 21 rotates along with the rotating shaft 19.

Referring to fig. 5, the gear transmission mechanism includes a sun gear 23 coaxially fixed to the lower end of the rotating shaft 19, three sets of planetary gears 24 are uniformly engaged with the periphery of the sun gear 23 along the circumferential direction thereof, the same ring gear 25 is sleeved outside the three sets of planetary gears 24, and the three sets of planetary gears 24 are uniformly engaged with the ring gear 25; the stirring shaft of the stirring blade 21 is coaxially fixed with the lower end of the gear ring 25 through a connecting frame 26. A limiting frame 22 is further fixed on the rotating shaft 19, the limiting frame 22 comprises three limiting rods 221, the three limiting rods 221 are uniformly arranged along the circumferential direction of the rotating shaft 19, one end of each limiting rod 221 is fixedly welded with the rotating shaft 19, the other end of each limiting rod is fixedly welded with an L-shaped rod 222, grooves (not shown in the figure) with the same height as the gear ring 25 are formed between the L-shaped rods 222 and the limiting rods 221, the outer side of the gear ring 25 is inserted into the three groups of grooves, and the gear ring 25 rotates relative to the limiting frame 22; meanwhile, the three sets of planetary gears 24 are respectively connected to the corresponding limit rods 221 in a rotating manner through rotating shafts. When the rotating shaft 19 drives the sun gear 23 and the limiting frame 22 to rotate, the sun gear 23 drives the planet gear 24 to rotate, so that the planet gear 24 drives the gear ring 25 to rotate, the gear ring 25 rotates in the opposite direction of the rotating shaft 19, and the stirring blade 21 is driven to rotate.

The implementation principle of the embodiment is as follows: when the water medium enters the water inlet cavity 7 from the water inlet pipe connecting pipe 9, the water medium drives the helical blade 20 to rotate, the helical blade 20 drives the filter screen 13 to rotate clockwise, and the gear ring 25 drives the stirring blade 21 to rotate anticlockwise under the meshing action of the planetary gear 24, the sun gear 23 and the gear ring 25 simultaneously, so that the water medium in the filter screen 13 is disturbed; then the aqueous medium enters the tube bundle 4 from an opening at one end of the tube bundle 4, and simultaneously the steam enters the shell 1 to exchange heat with the aqueous medium in the tube bundle 4, so as to heat the aqueous medium in the tube bundle 4, the heated aqueous medium is discharged through the water outlet connecting pipe, the steam is condensed into water in the heat exchange process, and the condensed water is discharged through the drain outlet connecting pipe 12;

when impurity is too much in filter screen 13, only need take off the inlet tube from inlet tube takeover 9, can directly take out filter screen 13 from inlet tube takeover 9, still can take out support frame 17, helical blade 20 and stirring vane 21 from filter screen 13 simultaneously, be convenient for clean the impurity in filter screen 13, clean back with filter screen 13 reload in inlet tube takeover 9 can.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A heat supply network heater comprises a shell (1), a front end pipe box (2) and a rear end pipe box (3) which are arranged at two ends of the shell (1), wherein a pipe bundle (4) is arranged in the shell (1), a partition plate (6) is arranged in the front end pipe box (2) along the axis of the shell (1) and is divided into an upper water inlet cavity (7) and a lower water outlet cavity (8), the upper end of the water inlet cavity (7) is communicated with a water inlet pipe connecting pipe (9), the lower end of the water outlet cavity (8) is communicated with a water outlet pipe connecting pipe (10), the upper end of the shell (1) is provided with a steam inlet connecting pipe (11), and the lower end of the shell (1; the method is characterized in that: a filter screen (13) is arranged in the water inlet pipe connecting pipe (9), the filter screen (13) is in a cylindrical shape with an opening at the upper end, the upper end is rotatably connected in the water inlet pipe connecting pipe (9), and the lower end extends into the water inlet cavity (7); a driving piece for driving the filter screen (13) to rotate is arranged in the water inlet pipe connecting pipe (9), the driving piece comprises a supporting frame (17) arranged at an opening at the upper end of the filter screen (13) and a helical blade (20) connected with the supporting frame (17) and coaxially arranged with the filter screen (13), a rotating shaft (19) coaxially arranged with the helical blade (20) is fixed at the lower end of the supporting frame (17), and a stirring blade (21) coaxially arranged with the rotating shaft (19) is also arranged in the filter screen (13); the lower end of the rotating shaft (19) is provided with a gear transmission mechanism for driving the stirring blades (21) to rotate reversely, the gear transmission mechanism comprises a sun gear (23), a gear ring (25) and a plurality of groups of planet gears (24), and the plurality of groups of planet gears (24) are uniformly arranged along the circumferential direction of the sun gear (23) and are simultaneously meshed with the sun gear (23) and the gear ring (25); sun gear (23) and axis of rotation (19) coaxial fixed, be provided with spacing (22) on axis of rotation (19), multiunit planetary gear (24) all rotate with ring gear (25) and connect on spacing (22), stirring vane (21) are fixed in ring gear (25) lower extreme.

2. The heater grid heater of claim 1, wherein: the upper end of the filter screen (13) is provided with a slot (18) which is arranged in parallel along the axis of the filter screen (13), and the support frame (17) is inserted into the slot (18).

3. The heater grid heater of claim 1, wherein: spacing (22) include many gag lever posts (221) that correspond every group planetary gear (24) setting respectively, gag lever post (221) one end is fixed with axis of rotation (19) lateral wall, and the other end is fixed with L type pole (222), L type pole (222) and gag lever post (221) form the recess that supplies ring gear (25) to peg graft.

4. The heater grid heater of claim 1, wherein: the outer wall of the upper end of the filter screen (13) is fixed with a limiting ring (14), and the upper end of the water inlet pipe connecting pipe (9) is provided with a limiting groove (15) for the limiting ring (14) to be inserted from top to bottom.

5. The heater grid heater of claim 4, wherein: the outer side wall and the lower end of the limiting ring (14) are respectively embedded with a plurality of balls (16), and the balls (16) are in rolling contact with the inner wall of the limiting groove (15).

6. The heater grid heater of claim 1, wherein: the filter screen (13) is arranged in a round table shape with a large upper part and a small lower part.