Low-temperature-difference plate heat exchanger

Abstract

The utility model discloses a low-temperature-difference plate heat exchanger which comprises a front end plate, a rear end plate is arranged on one side of the front end plate, a plurality of sets of plate pieces arranged at equal intervals are arranged between the front end plate and the rear end plate, and two sets of oppositely-arranged liquid inlet pipes are arranged on the upper portion of the side, away from the plate pieces, of the front end plate. A connecting pipe is in threaded connection with the interior of the liquid inlet pipe, a sealing piece is arranged between the connecting pipe and the liquid inlet pipe, a filter screen is installed in the middle of the inner wall of the connecting pipe, an annular groove is formed in the end, close to the front end plate, of the connecting pipe, and the annular groove is filled with a filter layer. During connection of the liquid inlet pipe and the connecting pipe, seepage of liquid can be reduced to the maximum extent through the waterproof sealant and the O-shaped sealing ring; activated carbon in the filter layer can filter out some fine impurities to prevent the temperature difference of the plate heat exchanger from being influenced by dirt generated by the plate, so that the heat efficiency of the plate heat exchanger can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of plate heat exchangers, in particular to a low temperature difference plate heat exchanger. Background Art

[0002] Plate heat exchanger is a kind of high-efficiency heat exchanger made of a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. Plate heat exchanger is an ideal equipment for liquid-liquid and liquid-steam heat exchange. It has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, wide application and long service life. Under the same pressure loss, its heat transfer coefficient is 3-5 times higher than that of tubular heat exchanger, and the footprint is one-third of that of tubular heat exchanger, and the heat recovery rate can be as high as more than 90%.

[0003] Existing plate heat exchangers may contain impurities in the added liquid, and the plates will produce dirt after long-term use, which can easily affect the temperature difference of the heat exchanger. In addition, when replacing or disassembling the plates, multiple bolts need to be loosened one by one. The disassembly process is cumbersome, which brings inconvenience to users.

[0004] To this end, we propose a low temperature difference plate heat exchanger. Utility Model Content

[0005] The main purpose of the utility model is to provide a low temperature difference plate heat exchanger, in order to prevent the plates from being fouled and facilitate the removal of the plates, thereby improving the disassembly efficiency, and can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A low temperature difference plate heat exchanger, comprising a front end plate, a rear end plate is arranged on one side of the front end plate, a plurality of plates arranged at equal distances are arranged between the front end plate and the rear end plate, two groups of liquid inlet pipes arranged oppositely are arranged on the upper part of the side of the front end plate away from the plates, a connecting pipe is threadedly connected to the inner part of the liquid inlet pipe, a sealing member is arranged between the connecting pipe and the liquid inlet pipe, a filter screen is installed at the middle part of the inner wall of the connecting pipe, an annular groove is arranged at one end of the connecting pipe close to the front end plate, and a filter layer is filled in the annular groove;

[0008] Two sets of top plates and bottom plates arranged relatively parallel to each other are fixedly connected to the upper and lower parts of one side of the front end plate, and mounting blocks are arranged at the ends of the top plates and bottom plates away from the front end plate, and mounting grooves for mounting the mounting blocks are arranged on one side of the rear end plate, and the sizes of the mounting grooves and the mounting blocks are adapted;

[0009] The bottom end of the top plate is rotatably connected with a screw rod, and one end of the screw rod passes through the top plate and is fixedly connected with a turntable. The screw rod is spirally driven with a sleeve block on the outside. Both ends of the plate are provided with vertical rods, and the top end of the vertical rod is fixedly connected with the bottom end of the sleeve block. Several fixed rods are inserted into the inside of the vertical rod at equal distances.

[0010] Both ends of the front plate and the rear plate are provided with a plurality of annular grooves for inserting a plurality of fixing rods, the inner walls of the top and bottom ends of the annular grooves are staggered with ball mounting grooves, the top and bottom ends of the fixing rods are provided with a plurality of groups of staggered grooves, a spring is fixedly installed inside the groove, one end of the spring close to the ball mounting groove is provided with a limiting ball, and the limiting ball is clamped inside the ball mounting groove;

[0011] The inner top end of the bottom plate is fixedly connected with a cross bar, the outer part of the cross bar is sleeved with a sliding block, and the top end of the sliding block is fixedly connected with the bottom end of the vertical bar.

[0012] By adopting the above technical scheme, in the connection between the liquid inlet pipe and the connecting pipe, the sealing member can reduce the seepage of the liquid; the filter screen can filter some larger particles such as soil and iron filings, and the filter layer can filter out some fine impurities; when it is necessary to disassemble the plate, the user can rotate one end of the screw rod through the turntable, so that the screw rod can drive the sleeve block to move linearly left and right, so that the sleeve block and the slider can synchronously drive the vertical rod to move, and then the vertical rod can synchronously drive several fixed rods to move inside the annular grooves at both ends of the front end plate and the rear end plate. At this time, the limiting ball clamped in the ball mounting groove moves outward and squeezes the spring on its corresponding side. With the movement of the fixed rod, when the spring pushes the limiting ball out of the annular groove, the mounting blocks of the top plate, bottom plate and rear end plate are separated from the mounting groove, that is, the plate is disassembled, and it is only necessary to control the rotation of the screw rod through the turntable to achieve simultaneous control of several fixed rods, simplifying the operation steps, facilitating disassembly, and bringing convenience to the staff.

[0013] It should be pointed out that the liquid inlet pipe and the connecting pipe are made of stainless steel. The use of stainless steel can minimize the corrosion of the liquid on the liquid inlet pipe and reduce the entry of rust into the plate.

[0014] Furthermore, the sealing member is an O-ring, the threaded connection portion between the connecting pipe and the liquid inlet pipe is coated with waterproof sealant, and the filter layer includes a hollow elastic filter membrane, and the elastic filter membrane is filled with activated carbon.

[0015] By adopting the above technical solution, the leakage of liquid can be reduced to the maximum extent through the waterproof sealant and the O-ring; the activated carbon in the filter layer can filter out some fine impurities.

[0016] Furthermore, an upper guide rod and a lower guide rod are installed on the upper and lower parts of one side of the front end plate respectively, the multiple groups of plates arranged at equal distances are located between the upper guide rod and the lower guide rod, and a rectangular groove is provided at the middle of the top end and the middle of the bottom end of the rear end plate;

[0017] Furthermore, a support column is provided on one side of the rear end plate away from the plate, and one end of the upper guide rod and the lower guide rod penetrates the rectangular groove and is connected to one side of the support column;

[0018] By adopting the above technical solution, first, one end of the upper guide rod and the lower guide rod are connected to one side of the front end plate by bolts, and multiple sets of plates are placed between the upper guide rod and the lower guide rod. After placement, the rectangular groove of the rear end plate is clamped on the bottom of the upper guide rod and the top of the lower guide rod, and the other ends of the upper guide rod and the lower guide rod are connected to one side of the pillar by bolts.

[0019] It should be pointed out that gaskets are installed between the upper guide rod, the lower guide rod and the plate to prevent the upper guide rod and the lower guide rod from causing wear to the plate, thereby affecting the working efficiency of the heat exchanger.

[0020] Furthermore, two sets of relatively parallel liquid outlet pipes are provided at the lower part of the same side of the front end plate close to the liquid inlet pipe, the liquid outlet pipe is equal in size to the liquid inlet pipe, and two sets of relatively parallel ground feet are installed at the bottom of one side of the front end plate close to the liquid outlet pipe.

[0021] By adopting the above technical solution, the liquid entering the liquid inlet pipe flows into the plate and finally flows out through the liquid outlet pipe; the foot is installed on one side of the front end plate by bolts, thereby improving the stability of the plate heat exchanger.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] (1) The utility model discloses a low temperature differential plate heat exchanger. In the connection between the liquid inlet pipe and the connecting pipe, the waterproof sealant and the O-ring can reduce the liquid leakage to the maximum extent. The activated carbon in the filter layer can filter out some fine impurities to prevent the plate from being fouled and affecting the temperature difference of the plate heat exchanger, thereby enhancing the heat exchange efficiency of the plate.

[0024] (2) The utility model discloses a low temperature difference plate heat exchanger. When the plate needs to be disassembled, the user can rotate one end of the screw rod through a turntable, so that the screw rod can drive the sleeve block to move linearly left and right, so that the sleeve block and the slider can synchronously drive the vertical rod to move, and then the vertical rod can synchronously drive a plurality of fixed rods to move inside the annular grooves at both ends of the front plate and the rear plate. At this time, the limiting ball clamped in the ball mounting groove moves outward and squeezes the spring on its corresponding side. As the fixed rod moves, when the spring pushes the limiting ball out of the annular groove, the mounting blocks of the top plate, bottom plate and rear plate are separated from the mounting groove, that is, the plate is disassembled. It is only necessary to control the rotation of the screw rod through the turntable to achieve simultaneous control of a plurality of fixed rods, thereby simplifying the operation steps, facilitating disassembly, and bringing convenience to the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a structural schematic diagram of a low temperature difference plate heat exchanger.

[0026] Figure 2 The utility model is a schematic diagram of the internal structure of a liquid inlet pipe of a low temperature difference plate heat exchanger.

[0027] Figure 3 The utility model is a schematic diagram of the internal structure of a front end plate, a fixing rod and a rear end plate of a low temperature difference plate heat exchanger.

[0028] In the figure: 1. front end plate; 2. rear end plate; 3. plate; 4. liquid inlet pipe; 5. connecting pipe; 6. seal; 7. filter layer; 8. filter screen; 9. elastic filter membrane; 10. activated carbon; 11. top plate; 12. screw rod; 13. turntable; 14. mounting groove; 15. mounting block; 16. sleeve block; 17. vertical rod; 18. fixing rod; 19. groove; 20. spring; 21. limiting ball; 22. ball mounting groove; 23. bottom plate; 24. cross rod; 25. slider; 26. liquid outlet pipe; 27. foot; 28. upper guide rod; 29. ​​lower guide rod; 30. pillar. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] In order to prevent the plates from being contaminated and facilitate the removal of the plates, thereby improving the removal efficiency, such as Figure 1 , Figure 2 , Figure 3As shown, a low temperature difference plate heat exchanger comprises a front end plate 1, a rear end plate 2 is arranged on one side of the front end plate 1, a plurality of groups of plates 3 arranged at equal distances are arranged between the front end plate 1 and the rear end plate 2, two groups of liquid inlet pipes 4 arranged oppositely are arranged on the upper part of the side of the front end plate 1 away from the plates 3, a connecting pipe 5 is threadedly connected to the inner part of the liquid inlet pipe 4, a sealing member 6 is arranged between the connecting pipe 5 and the liquid inlet pipe 4, a filter screen 8 is installed in the middle of the inner wall of the connecting pipe 5, an annular groove is arranged at one end of the connecting pipe 5 close to the front end plate 1, and a filter layer 7 is filled in the annular groove;

[0031] Two sets of relatively parallel top plates 11 and bottom plates 23 are fixedly connected to the upper and lower parts of one side of the front plate 1, and mounting blocks 15 are provided at the ends of the top plates 11 and the bottom plates 23 away from the front plate 1. A mounting groove 14 for mounting the mounting block 15 is provided on one side of the rear plate 2, and the mounting groove 14 is adapted to the size of the mounting block 15.

[0032] The bottom end of the top plate 11 is rotatably connected to a screw rod 12, and one end of the screw rod 12 passes through the top plate 11 and is fixedly connected to a turntable 13. The screw rod 12 is spirally driven with a sleeve block 16 on the outside. Both ends of the plate 3 are provided with vertical rods 17, and the top of the vertical rod 17 is fixedly connected to the bottom end of the sleeve block 16. A plurality of fixed rods 18 are inserted into the inside of the vertical rod 17 at equal distances.

[0033] Both ends of the front end plate 1 and the rear end plate 2 are provided with a plurality of annular grooves for inserting a plurality of fixing rods 18, and the inner walls of the top and bottom ends of the annular grooves are staggered with ball mounting grooves 22, and the top and bottom ends of the fixing rods 18 are provided with a plurality of groups of staggered grooves 19, and a spring 20 is fixedly installed inside the groove 19, and a limiting ball 21 is provided at one end of the spring 20 close to the ball mounting groove 22, and the limiting ball 21 is clamped inside the ball mounting groove 22;

[0034] A cross bar 24 is fixedly connected to the top of the bottom plate 23 , a slider 25 is sleeved on the outside of the cross bar 24 , and the top of the slider 25 is fixedly connected to the bottom of the vertical bar 17 .

[0035] When in use, in the connection between the liquid inlet pipe 4 and the connecting pipe 5, the seal can reduce the leakage of liquid; the filter screen 8 can filter some larger particles such as soil and iron filings, and the filter layer 7 can filter out some fine impurities; when it is necessary to disassemble the plate 4, the user can rotate one end of the screw rod 12 through the turntable 13, so that the screw rod 12 can drive the sleeve block 16 to move linearly left and right, so that the sleeve block 16 and the slider 25 can synchronously drive the vertical rod 17 to move, and then the vertical rod 17 can synchronously drive a number of fixed rods 18 on the front end plate 1 and the annular grooves at both ends of the rear plate 2. At this time, the limiting ball 21 clamped in the ball mounting groove 22 moves outward and squeezes the spring 20 on its corresponding side. As the fixing rod 18 moves, when the spring 20 pushes the limiting ball 21 out of the annular groove, the top plate 11, the bottom plate 23 and the mounting block 15 of the rear plate 2 are separated from the mounting groove 14, that is, the plate 3 is disassembled. It is only necessary to control the rotation of the screw rod 12 through the turntable 13 to achieve simultaneous control of several fixing rods 18, simplifying the operation steps, facilitating disassembly, and bringing convenience to the staff;

[0036] It should be pointed out that the liquid inlet pipe 4 and the connecting pipe 5 are made of stainless steel. The use of stainless steel can minimize the corrosion of the liquid on the liquid inlet pipe 4 and reduce the entry of rust into the plate 3.

[0037] In order to improve the sealing performance between the connecting pipe 5 and the liquid inlet pipe 4 and the filtering effect of the connecting pipe 5, as shown in FIG. Figure 2 As shown, the utility model also includes that the sealing member 6 is an O-ring, the threaded connection portion between the connecting pipe 5 and the liquid inlet pipe 4 is coated with a waterproof sealant, and the filter layer 7 includes a hollow elastic filter membrane 9, and the elastic filter membrane 9 is filled with activated carbon 10.

[0038] When in use, the waterproof sealant and the O-ring can reduce the leakage of liquid to the greatest extent; the activated carbon 10 in the filter layer 7 can filter out some fine impurities.

[0039] For example, Figure 1 , Figure 3 As shown, the utility model also includes that an upper guide rod 28 and a lower guide rod 29 are respectively installed on the upper and lower parts of one side of the front end plate 1, and the multiple groups of plates 3 arranged at equal distances are located between the upper guide rod 28 and the lower guide rod 29, and the middle part of the top end and the middle part of the bottom end of the rear end plate 2 are both provided with rectangular grooves;

[0040] A support column 30 is provided on one side of the rear end plate 2 away from the plate 3 , and one end of the upper guide rod 28 and the lower guide rod 29 passes through the rectangular groove and is connected to one side of the support column 30 .

[0041] When in use, firstly, one end of the upper guide rod 28 and the lower guide rod 29 are connected to one side of the front end plate by bolts, and multiple sets of plates 4 are placed between the upper guide rod 28 and the lower guide rod 29. After the placement is completed, the rectangular groove of the rear end plate 2 is clamped on the bottom of the upper guide rod 28 and the top of the lower guide rod 29, and the other ends of the upper guide rod 28 and the lower guide rod 29 are connected to one side of the support 30 by bolts;

[0042] It should be pointed out that gaskets are installed between the upper guide rod 28, the lower guide rod 29 and the plate 3 to prevent the upper guide rod 28, the lower guide rod 29 from causing wear to the plate 3, thereby affecting the working efficiency of the heat exchanger.

[0043] For example, Figure 1 As shown, the utility model also includes that two groups of relatively parallel liquid outlet pipes 26 are provided at the lower part of the same side of the front end plate 1 close to the liquid inlet pipe 3, and the liquid outlet pipe 26 is equal in size to the liquid inlet pipe 4, and two groups of relatively parallel ground feet 27 are installed at the bottom of one side of the front end plate 1 close to the liquid outlet pipe 26.

[0044] When in use, the liquid entering the liquid inlet pipe 4 flows into the plate 3 and finally flows out through the liquid outlet pipe 26; the foot 27 is installed on one side of the front end plate 1 by bolts, thereby improving the stability of the plate heat exchanger.

[0045] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A low temperature difference plate heat exchanger, comprising a front end plate (1), characterized in that: A rear end plate (2) is provided on one side of the front end plate (1), a plurality of groups of plates (3) are provided between the front end plate (1) and the rear end plate (2) and are arranged at equal distances, two groups of liquid inlet pipes (4) are provided on the upper part of the side of the front end plate (1) away from the plates (3) and are arranged opposite to each other, a connecting pipe (5) is internally threadedly connected to the liquid inlet pipe (4), a sealing member (6) is provided between the connecting pipe (5) and the liquid inlet pipe (4), a filter screen (8) is installed in the middle of the inner wall of the connecting pipe (5), an annular groove is provided at one end of the connecting pipe (5) close to the front end plate (1), and a filter layer (7) is filled in the annular groove; Two sets of top plates (11) and bottom plates (23) arranged in parallel are respectively fixedly connected at the upper and lower parts of one side of the front plate (1); a mounting block (15) is provided at one end of the top plate (11) and the bottom plate (23) away from the front plate (1); a mounting groove (14) for mounting the mounting block (15) is provided at one side of the rear plate (2); the mounting groove (14) and the mounting block (15) are adapted in size; The bottom end of the top plate (11) is rotatably connected to a screw rod (12), and one end of the screw rod (12) penetrates the top plate (11) and is fixedly connected to a turntable (13). The screw rod (12) is spirally driven with a sleeve block (16) on the outside. Both ends of the plate (3) are provided with vertical rods (17), and the top end of the vertical rod (17) is fixedly connected to the bottom end of the sleeve block (16). A plurality of fixed rods (18) are equidistantly inserted into the inside of the vertical rod (17). Both ends of the front end plate (1) and the rear end plate (2) are provided with a plurality of annular grooves for inserting a plurality of fixing rods (18); the inner walls of the top and bottom ends of the annular grooves are staggered with ball mounting grooves (22); the top and bottom ends of the fixing rods (18) are provided with a plurality of groups of staggered grooves (19); a spring (20) is fixedly installed inside the groove (19); a limiting ball (21) is provided at one end of the spring (20) close to the ball mounting groove (22); the limiting ball (21) is clamped inside the ball mounting groove (22).

2. A low temperature difference plate heat exchanger according to claim 1, characterized in that: The sealing member (6) is an O-ring, the threaded connection portion between the connecting pipe (5) and the liquid inlet pipe (4) is coated with waterproof sealant, and the filter layer (7) includes a hollow elastic filter membrane (9), and the elastic filter membrane (9) is filled with activated carbon (10).

3. The low temperature difference plate heat exchanger according to claim 1, characterized in that: The inner top end of the bottom plate (23) is fixedly connected to a cross bar (24), the outer part of the cross bar (24) is sleeved with a slider (25), and the top end of the slider (25) is fixedly connected to the bottom end of the vertical bar (17).

4. The low temperature difference plate heat exchanger according to claim 1, characterized in that: An upper guide rod (28) and a lower guide rod (29) are respectively installed on the upper and lower parts of one side of the front end plate (1), the multiple groups of plates (3) arranged at equal distances are located between the upper guide rod (28) and the lower guide rod (29), and a rectangular groove is provided at the middle of the top end and the middle of the bottom end of the rear end plate (2).

5. The low temperature difference plate heat exchanger according to claim 4, characterized in that: A support column (30) is provided on the side of the rear end plate (2) away from the plate (3), and one end of the upper guide rod (28) and the lower guide rod (29) penetrates the rectangular groove and is connected to one side of the support column (30).

6. The low temperature difference plate heat exchanger according to claim 1, characterized in that: Two groups of relatively parallel liquid outlet pipes (26) are provided at the lower part of the same side of the front end plate (1) close to the liquid inlet pipe (4); the liquid outlet pipes (26) are equal in size to the liquid inlet pipe (4); and two groups of relatively parallel ground feet (27) are installed at the bottom of one side of the front end plate (1) close to the liquid outlet pipe (26).

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