CN216523294U

CN216523294U - Overheating prevention structure for plate heat exchanger

Info

Publication number: CN216523294U
Application number: CN202123346085.3U
Authority: CN
Inventors: 唐亮; 吕永军; 李�浩; 许亚成
Original assignee: Jiangsu Bochini Environmental Protection Technology Co ltd
Current assignee: Jiangsu Bochini Environmental Protection Technology Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-13
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to the technical field of heat conversion equipment, in particular to an overheating prevention structure for a plate heat exchanger, which comprises a heat exchanger body, wherein electric three-way valves are respectively arranged at two medium inlets at the upper part of one end surface of the heat exchanger body and two medium outlets at the lower part of the end surface of the heat exchanger body. The utility model utilizes the temperature sensor to monitor the temperature of the heat exchanger main body in real time, and automatically starts the cleaning function according to the temperature change of the heat exchanger main body, thereby avoiding the problem that the traditional regular cleaning mode easily causes untimely cleaning or too frequent cleaning of the heat exchanger main body.

Description

Overheating prevention structure for plate heat exchanger

Technical Field

The utility model relates to the technical field of heat conversion equipment, in particular to an anti-overheating structure for a plate heat exchanger.

Background

The plate heat exchanger is widely applied to various fields at present as a high-efficiency heat exchanger, and is popular among people due to the characteristics of light weight, small occupied area, low investment, high heat exchange efficiency, flexible assembly, easy scale removal and the like. However, the plate heat exchanger has a small flow cross section, and is easily scaled and blocked, and the blockage of the plate heat exchanger is mainly caused by the scaling of circulating water, generally because carbonate in water is heated to form magnesium hydroxide and other substances which are adhered to the heated surface of the heat exchanger plate to cause poor water circulation of the heated surface, and greatly reduce the heat transfer efficiency of the heat exchanger, so that the cleaning during shutdown is very important.

The cleaning methods generally used in plate heat exchangers include acid cleaning, mechanical cleaning, and high-pressure water cleaning. However, the above cleaning method is generally performed by a regular cleaning method, and the scale in the plate heat exchanger is mainly generated due to the hardness of water and the hardness of the water source is not easy to control, so that the problem of untimely cleaning or too frequent cleaning may be caused when the regular cleaning method is adopted, the equipment itself is often damaged when the regular cleaning method is not performed, even the equipment is scrapped, and the working efficiency of the machine is affected when the regular cleaning method is performed too frequently.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides an overheating prevention structure for a plate heat exchanger, which can automatically start a cleaning function according to the temperature change of a heat exchanger main body and solve the problem that the conventional regular cleaning mode can cause untimely cleaning or too frequent cleaning of the heat exchanger main body.

(II) technical scheme

In order to achieve the purpose of automatically starting the cleaning function according to the temperature change of the heat exchanger main body, the utility model provides the following technical scheme: the utility model provides a plate heat exchanger is with preventing overheated structure, includes the heat exchanger main part, electric three-way valve is all installed in two medium import departments on a heat exchanger main part terminal surface upper portion and two medium exit of this terminal surface lower part, still includes wiper mechanism, wiper mechanism include inside be equipped with the washing case and the feed liquor end of washing liquid with wash the liquid pump of case intercommunication, the play liquid end of liquid pump is through connecting pipe fitting and two medium import department electric three-way valve intercommunication, wiper mechanism still including be used for measuring the temperature sensor of heat exchanger main part temperature and with the plc controller of temperature sensor's electricity connection, electric three-way valve the liquid pump all with plc controller electricity is connected.

Optionally, the heat exchanger main body includes a movable plate, a fixed plate, and a plurality of plates for heat conduction sandwiched between the movable plate and the fixed plate, the temperature sensor is a non-contact infrared temperature sensor mounted on the movable plate or the fixed plate, and a detection end of the infrared temperature sensor faces an outer wall of the plate.

Optionally, the heat exchanger main part still includes that the horizontal activity runs through two guide arms of part about the fly leaf, slab top and bottom all are formed with respectively with two guide arm sliding fit's location breach, two the one end of guide arm all with the fixed plate is connected, and the other end is connected with the connecting plate jointly, install on the connecting plate with the pneumatic cylinder that the plc controller electricity is connected, the output of pneumatic cylinder with the fly leaf is kept away from the one side of slab is fixed, and is adjacent it is used for keeping apart to press from both sides between the slab the inside cold and hot passageway of heat exchanger main part and the sealing washer that prevents the medium leakage, the sealing washer is the hollow rubber material, heat exchanger main part top be equipped with be used for to fill the inlet pipe spare of gassing body in the sealing washer.

Optionally, the air inlet pipe comprises a main air pipe and a plurality of rubber branch air pipes connected with and communicated with the side wall of the main air pipe, one end of the main air pipe is closed, the other end of the main air pipe is connected with an external inflation and deflation device, and the plurality of branch air pipes are respectively communicated with the sealing rings on the plurality of plates.

Optionally, the sealing ring includes a hollow tube made of rubber and at least one group of connecting edges with trapezoidal cross sections arranged along the length direction of the outer wall of the hollow tube, and at least one side of the opposite side of the adjacent plate is provided with a connecting groove adapted to the connecting edge.

Optionally, the two groups of connecting edges are respectively arranged on the upper side and the lower side of the hollow tube, and connecting grooves matched with the connecting edges are respectively arranged on the opposite sides of the adjacent plates.

Optionally, the connecting pipe includes an upper main pipe communicating with the two electric three-way valves connected to the two medium inlets, and an upper support pipe having one end connected to a side wall of the upper main pipe, and the other end of the upper support pipe is connected to a liquid discharge end of the liquid pump.

Optionally, a lower main pipe is connected between the two electric three-way valves connected with the two medium outlets, and a lower branch pipe is connected to a side wall of the lower main pipe.

(III) advantageous effects

Compared with the prior art, the utility model provides an overheating prevention structure for a plate heat exchanger, which has the following beneficial effects:

1. according to the utility model, the temperature of the heat exchanger main body is monitored in real time by using the temperature sensor, the cleaning function is automatically started according to the temperature change of the heat exchanger main body, the intervention of workers is not needed, and compared with the traditional regular cleaning mode, the problem that the cleaning of the heat exchanger main body is not timely or too frequent can be avoided by using the mode;

2. according to the utility model, the temperature sensor is arranged on the movable plate or the fixed plate, and the detection end of the temperature sensor is opposite to the plate, and as the main heat-conducting part and the part mainly attached with dirt are both plates, the temperature of the plate can be more accurately detected for judging whether the interior of the heat exchanger main body needs to be cleaned;

3. according to the utility model, by arranging the guide rod, the positioning notch, the connecting plate, the hydraulic cylinder, the sealing ring and the air inlet pipe fitting, in the cleaning process of the heat exchanger main body, when gas is injected into the sealing ring through the air inlet pipe fitting, the movable plate is moved to one side far away from the fixed plate by using the hydraulic cylinder, so that the distance between adjacent plates is increased by the inflated and expanded sealing ring, and the flowing and discharging of impurities in the cleaning liquid flowing through the plates are facilitated.

Drawings

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

FIG. 2 is an enlarged schematic view of FIG. 1 at A according to the present invention;

FIG. 3 is a schematic view of the structure of the present invention showing the plate and the sealing ring disassembled;

fig. 4 is a sectional structure diagram of the sealing ring of the utility model.

In the figure: 1. a fixing plate; 2. a movable plate; 3. a sheet; 30. connecting grooves; 31. positioning the notch; 4. a temperature sensor; 5. a cleaning tank; 6. a liquid pump; 7. a plc controller; 8. an upper main pipe; 9. an upper branch pipe; 10. a lower main pipe; 11. a lower branch pipe; 12. a guide bar; 13. an electric three-way valve; 14. a connecting plate; 15. a hydraulic cylinder; 16. a seal ring; 160. a hollow tube; 161. a connecting edge; 17. a main air pipe; 18. a bronchus.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1 to 4, an embodiment of the present invention provides a technical solution: an overheating prevention structure for a plate heat exchanger comprises a heat exchanger body, wherein two medium inlets at the upper part of one end face of the heat exchanger body and two medium outlets at the lower part of the end face are respectively provided with an electric three-way valve 13, two medium inlets, two medium outlets and through holes on a plate 3 which has a heat exchange effect in the heat exchanger body form two independent cold and hot channels, the overheating prevention structure also comprises a cleaning mechanism, the cleaning mechanism comprises a cleaning box 5 internally provided with cleaning liquid and a liquid pump 6 of which the liquid inlet end is communicated with the cleaning box 5, the cleaning liquid is preferably formic acid cleaning liquid, the liquid outlet end of the liquid pump 6 is communicated with the electric three-way valves 13 at the two medium inlets through connecting pipes, the connecting pipes can be respectively connected with two pipelines between the two electric three-way valves 13 and the liquid outlet end of the liquid pump 6, the cleaning mechanism also comprises a temperature sensor 4 for measuring the temperature of the heat exchanger body and a plc controller 7 electrically connected with the temperature sensor 4, wherein, the temperature sensor 4 can be selected from a contact type, also can be selected from a non-contact type, the electric three-way valve 13 and the liquid pump 6 are both electrically connected with the plc controller 7, the temperature sensor 4 is utilized to monitor the temperature of the heat exchanger main body in real time, when the temperature on the heat exchanger main body exceeds the threshold value of the temperature sensor 4, the plc controller 7 controls the electric three-way valve 13 to act at the moment, so that the medium inlet is communicated with the connecting pipe fitting, the medium outlet is communicated with the outside, then the plc controller 7 controls the liquid pump 6 to be started, the liquid pump 6 pumps the cleaning liquid in the cleaning box 5 to the cold and hot channels in the heat exchanger main body through the connecting pipe fitting for acid cleaning, thereby removing the scale attached in the channels, in the whole cleaning process, the cleaning mechanism can automatically start the cleaning function according to the temperature change of the heat exchanger main body, and does not need the intervention of working personnel, compared with the traditional regular cleaning mode, by adopting the mode, the problem that the heat exchanger main body is not cleaned timely or cleaned too frequently can be avoided.

As a preferred embodiment, the heat exchanger body of this embodiment includes a movable plate 2, a fixed plate 1, and a plurality of plates 3 for heat conduction sandwiched between the movable plate 2 and the fixed plate 1, the temperature sensor 4 is a non-contact infrared temperature sensor 4 mounted on the movable plate 2 or the fixed plate 1, a detection end of the infrared temperature sensor 4 is opposite to an outer wall of the plate 3, and since the main heat-conducting component and the component mainly attached with dirt are both the plates 3, it is more accurate to detect the temperature of the plate 3 to determine whether the inside of the heat exchanger body needs to be cleaned.

When the interior of the heat exchanger main body is cleaned, in order to facilitate the discharge of impurities after pickling, the heat exchanger main body further comprises two guide rods 12 horizontally and movably penetrating through the upper part and the lower part of the movable plate 2, positioning notches 31 respectively in sliding fit with the two guide rods 12 are formed at the top and the bottom of each plate 3, one end of each guide rod 12 is connected with the fixed plate 1, the other end of each guide rod is commonly connected with a connecting plate 14, a hydraulic cylinder 15 electrically connected with a plc controller 7 is mounted on each connecting plate 14, the output end of each hydraulic cylinder 15 is fixed to the surface, far away from the plate 3, of the movable plate 2, a sealing ring 16 used for isolating a cold and hot channel in the heat exchanger main body and preventing medium leakage is clamped between the adjacent plates 3, each sealing ring 16 is made of hollow rubber, an air inlet pipe fitting used for filling and discharging air into the sealing ring 16 is arranged at the top of the heat exchanger main body, wherein the air inlet pipe fitting can be connected with a plurality of independent pipelines between external air filling and discharging equipment and the sealing rings 16, or a plurality of air charging and discharging devices connected with each sealing ring 16, specifically, in the cleaning process of the heat exchanger main body, when gas is injected into the sealing ring 16 through an air inlet pipe, the movable plate 2 is moved to one side far away from the fixed plate 1 by using the hydraulic cylinder 15, so that the distance between the adjacent plates 3 is increased by the sealing ring 16 after being inflated and expanded, and the flowing and discharging of impurities in the cleaning liquid flowing through the plates 3 are facilitated.

As a preferred embodiment, the air inlet pipe of this embodiment includes a main air pipe 17 and a plurality of rubber branch air pipes 18 connected and communicated with the side wall of the main air pipe 17, one end of the main air pipe 17 is closed, the other end is connected with an external air charging and discharging device, and the plurality of branch air pipes 18 are respectively communicated with the sealing rings 16 on the plurality of sheets 3.

On the basis of the above embodiments, the sealing ring 16 of this embodiment includes a hollow tube 160 made of rubber and at least one set of connecting edges 161 with trapezoidal cross sections arranged along the length direction of the outer wall of the hollow tube 160, at least one side of the opposite side of the adjacent plate 3 is provided with a connecting groove 30 adapted to the connecting edge 161, the purpose of changing the space between the adjacent plates 3 can be achieved by charging and discharging air into and from the hollow tube 160, the connecting edges 161 can facilitate the connection between the sealing ring 16 and the plate 3, and the connected sealing ring 16 and the plate 3 are not easy to be separated.

On the basis of the above embodiment, the connecting edges 161 of this embodiment are two sets, the two sets of connecting edges 161 are respectively disposed on the upper and lower sides of the hollow tube 160, the connecting grooves 30 adapted to the connecting edges 161 are disposed on the opposite sides of the adjacent plates 3, and the two sets of connecting edges 161 are disposed on the two sides of the hollow tube 160, so that the adjacent plates 3 are connected more tightly.

As a preferred embodiment, the connecting pipe fitting of this embodiment includes the upper main pipe 8 that will communicate with two electric three-way valves 13 of two medium inlet connections and the upper branch pipe 9 that one end is connected with the upper main pipe 8 lateral wall, and the upper branch pipe 9 other end is connected with the drain outlet of liquid pump 6, communicates liquid pump 6 simultaneously with two electric three-way valves 13 through an upper main pipe 8 and an upper branch pipe 9, compares and is connected two electric three-way valves 13 respectively with the drain outlet of liquid pump 6 through two pipelines, has saved the pipeline setting.

On the basis of the above-mentioned embodiment, be connected with down between two electric three-way valve 13 that are connected with two medium exit of this implementation and be responsible for 10, the side wall of the lower person in charge 10 is connected with down branch pipe 11, and when the washing liquid was discharged, the unified discharge of accessible down branch pipe 11 compares the washing liquid and discharges respectively through two electric three-way valve 13 with the medium exit, and the processing is more convenient.

The working principle is as follows: when the heat exchanger body is normally used, external heat exchange media respectively enter through two medium inlets at the top of the fixed plate 1 and are discharged through two medium outlets after flowing through two independent cold and hot channels in the heat exchanger body, during the use of the heat exchanger body, the infrared temperature sensor 4 arranged on the movable plate 2 monitors the temperature of the outer wall of the heat exchanger body in real time and transmits temperature information to the plc controller 7, when the temperature on the heat exchanger body exceeds the threshold value of the temperature sensor 4, the plc controller 7 controls the action of the electric three-way valve 13 to enable the medium inlets to be communicated with the upper main pipe 8 and the upper supporting pipe 9, the medium outlets to be communicated with the outside through the lower main pipe 10 and the lower supporting pipe 11, then the plc controller 7 controls the liquid pump 6 to be started, and the liquid pump 6 pumps cleaning liquid in the cleaning tank 5 to the cold medium in the heat exchanger body through the upper main pipe 8 and the upper supporting pipe 9, Carry out the pickling in the hot aisle, finally, impurity after the pickling is discharged through lower branch pipe 11, during the pickling, usable outside fills gassing equipment and pours into gaseous in to sealing washer 16 into, utilize pneumatic cylinder 15 to remove fly leaf 2 to the one side of keeping away from fixed plate 1, increase adjacent slab 3's interval, thereby conveniently flow through the mobile of the impurity in the washing liquid of slab 3 and discharge, because whole cleaning process, cleaning mechanism can open the cleaning function according to the temperature variation of heat exchanger main part is automatic, and need not staff's intervention, compare traditional periodic cleaning mode, can avoid causing the problem that the heat exchanger main part washs untimely or washs too frequently.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plate heat exchanger is with preventing overheated structure which characterized in that: including the heat exchanger main part, electric three-way valve (13) are all installed to two medium import departments on a heat exchanger main part terminal surface upper portion and two medium exit of this terminal surface lower part, still include wiper mechanism, wiper mechanism including inside washing case (5) and the feed liquor end that are equipped with the washing liquid with wash liquid pump (6) of case (5) intercommunication, the play liquid end of liquid pump (6) is through connecting pipe fitting and two medium import department electric three-way valve (13) intercommunication, wiper mechanism still including be used for measuring temperature sensor (4) of heat exchanger main part temperature and with plc controller (7) of the electricity connection of temperature sensor (4), electric three-way valve (13) liquid pump (6) all with plc controller (7) electricity is connected.

2. An overheating prevention structure for a plate heat exchanger according to claim 1, wherein: the heat exchanger main part includes a fly leaf (2), a fixed plate (1) and presss from both sides and locates fly leaf (2) with polylith between fixed plate (1) is used for heat conducting slab (3), temperature sensor (4) are for installing non-contact infrared temperature sensor on fly leaf (2) or fixed plate (1), infrared temperature sensor's sense terminal is just to slab (3) outer wall.

3. An overheating prevention structure for a plate heat exchanger according to claim 2, wherein: the heat exchanger main body also comprises two guide rods (12) which horizontally and movably penetrate through the upper part and the lower part of the movable plate (2), the top and the bottom of the plate (3) are respectively provided with a positioning notch (31) which is respectively in sliding fit with the two guide rods (12), one end of each guide rod (12) is connected with the fixed plate (1), the other end of each guide rod is connected with a connecting plate (14) together, a hydraulic cylinder (15) electrically connected with the plc controller (7) is arranged on the connecting plate (14), the output end of the hydraulic cylinder (15) is fixed with one surface of the movable plate (2) far away from the plate sheets (3), a sealing ring (16) for isolating cold and hot channels in the heat exchanger body and preventing medium leakage is clamped between the adjacent plate sheets (3), the sealing ring (16) is made of hollow rubber, and an air inlet pipe fitting used for filling and discharging air into the sealing ring (16) is arranged at the top of the heat exchanger main body.

4. An overheating prevention structure for a plate heat exchanger according to claim 3, wherein: the air inlet pipe fitting comprises a main air pipe (17) and a plurality of branch air pipes (18) which are connected with the side wall of the main air pipe (17) and are made of a rubber material, one end of the main air pipe (17) is sealed, the other end of the main air pipe is connected with external air charging and discharging equipment, and the plurality of branch air pipes (18) are respectively communicated with the plurality of sealing rings (16) on the plate pieces (3).

5. An overheating prevention structure for a plate heat exchanger according to claim 3 or 4, wherein: the sealing ring (16) comprises a hollow pipe (160) made of rubber and at least one group of connecting edges (161) with trapezoidal cross sections, wherein the connecting edges (161) are arranged along the length direction of the outer wall of the hollow pipe (160), and at least one side of the opposite side of the adjacent plate (3) is provided with a connecting groove (30) matched with the connecting edges (161).

6. An overheating prevention structure for a plate heat exchanger according to claim 5, wherein: the connecting edges (161) are divided into two groups, the two groups of connecting edges (161) are respectively arranged on the upper side and the lower side of the hollow pipe (160), and the opposite sides of the adjacent plates (3) are respectively provided with a connecting groove (30) matched with the connecting edges (161).

7. An overheating prevention structure for a plate heat exchanger according to claim 1, wherein: the connecting pipe fitting comprises an upper main pipe (8) communicated with the two electric three-way valves (13) and connected with the two medium inlets, and an upper branch pipe (9) with one end connected with the side wall of the upper main pipe (8), wherein the other end of the upper branch pipe (9) is connected with the liquid discharge end of the liquid pump (6).

8. An overheating prevention structure for a plate heat exchanger according to claim 1, wherein: and a lower main pipe (10) is connected between the two electric three-way valves (13) connected with the two medium outlets, and the side wall of the lower main pipe (10) is connected with a lower branch pipe (11).