Plate type heat exchanger unit

Abstract

The utility model relates to a plate type heat exchanger unit which comprises a placing seat, a left pressing plate, a right pressing plate and a plurality of plate sheets, a high-temperature water inlet pipe and a high-temperature water outlet pipe are arranged on the left pressing plate, and a low-temperature water inlet pipe and a low-temperature water outlet pipe are arranged on the right pressing plate; the left pressing plate and the right pressing plate are arranged on the placing seat; an annular groove is formed in one side of the plate piece, an annular boss is arranged on the other side of the plate piece, and the shape of the annular boss is matched with that of the annular groove. During fitting, the annular bosses are inserted into the annular grooves in the adjacent plate sheets; the locking mechanism comprises a screw rod, a screw head, a pressure spring, a fastening nut and a backing ring; the screw head is fixed at one end of the screw rod; the screw rod penetrates through the through hole; the compression spring, the backing ring and the fastening nut are arranged at the other end of the screw in a sleeving mode, one end of the compression spring abuts against the side face of the left pressing plate or the side face of the right pressing plate, and the other end of the compression spring abuts against the backing ring; the problems of loose connection and leakage between the plates caused by alternate cooling and heating and thermal expansion and cold contraction of the plates are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange units, and specifically relates to a plate type heat exchange unit. Background Art

[0002] The heating station is the connection place between the heating network and the heat users. The main equipment of the heating station includes plate heat exchangers, circulating pumps, water tanks, network pipes, meters and control valves. Among them, the plate heat exchanger is a new type of high-efficiency exchanger composed of a series of metal sheets with a certain corrugated shape. The 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, easy installation and cleaning, wide application and long service life. Plate heat exchangers are widely used in heating stations.

[0003] The Chinese utility model patent with the authorization announcement number CN212362926U discloses "a high-efficiency and energy-saving plate heat exchanger heat exchange unit", which includes a fixed pressing plate, a plate and a placement seat. A plurality of the plates are attached together and the two ends are attached with a fixed pressing plate. The upper ends of the fixed pressing plate and the plate are connected with a guide rod, and the two ends of the guide rod are fixed to the fixed pressing plate by bolts. The fixed pressing plates are placed on the placement seat. The placement seat is located on both sides of the fixed pressing plate and is fixedly connected with side plates, and the side plates are threaded with fastening screws; the half plates are fixed by fastening screws, movable sleeves and clamps. During operation, the working environment of the plate is complex, with alternating hot and cold, and the plate is very likely to expand and contract with heat, causing the plates to be very easy to loosen and cause leakage. Utility Model Content

[0004] In order to solve the problem of loose connection between plates and leakage caused by thermal expansion and contraction of plates due to alternating hot and cold, the utility model provides a plate heat exchanger unit; in order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A plate heat exchanger unit comprises a placement seat, a left pressing plate, a right pressing plate and a plurality of plates; a high-temperature water inlet pipe and a high-temperature water outlet pipe are arranged on the left pressing plate, and a low-temperature water inlet pipe and a low-temperature water outlet pipe are arranged on the right pressing plate; a plurality of plates are bonded together and the two ends are bonded to the left pressing plate and the right pressing plate respectively; the left pressing plate and the right pressing plate are arranged on the placement seat; an annular groove is provided on one side of the plate, and an annular boss is provided on the other side of the plate, and the shape of the annular boss is adapted to the annular groove; when bonded, the annular boss is inserted into the annular groove on the adjacent plate; the left pressing plate and the right pressing plate are bonded together and the two ends are bonded to the left pressing plate and the right pressing plate respectively; the left pressing plate and the right pressing plate are arranged on the placement seat; an annular groove is provided on one side of the plate, and an annular boss is provided on the other side of the plate, and the shape of the annular boss is adapted to the annular groove; when bonded, the annular boss is inserted into the annular groove on the adjacent plate; There are 4 groups of locking mechanisms in between, and the 4 groups of locking mechanisms are distributed at the four corners; the locking mechanism includes a screw, a screw head, a compression spring, a fastening nut and a gasket; through holes are provided in the left pressure plate and the right pressure rib plate; the screw head is fixed at one end of the screw, and the screw is inserted through the through hole; the compression spring, the gasket and the fastening nut are respectively sleeved on the other end of the screw, one end of the compression spring presses on the side of the left pressure plate or the right pressure plate, and the other end of the compression spring presses on the gasket; the fastening nut is threadedly connected to the screw, and in the axial direction of the screw, the fastening nut forms a stop limit for the gasket.

[0006] The plate heat exchanger of the utility model has the following beneficial effects: the plates are adjacent to each other through the annular boss and the annular groove to improve the sealing between the plates; the locking mechanism is configured as a screw, a screw head, a compression spring, a fastening nut and a gasket structure; the left clamping plate and the right clamping plate are locked under the clamping action of the screw head and the fastening nut; when alternation between hot and cold occurs, the plates swell when heated, pushing the left and right clamping plates, squeezing the compression spring to eliminate the deformation caused by expansion when heated; when the plates shrink when cooled, the compression spring presses the left or right clamping plate to eliminate the deformation caused by contraction when cooled; thereby solving the problem of loose connection between the plates and leakage caused by alternation between hot and cold and thermal expansion and contraction of the plates.

[0007] Furthermore, the locking mechanism also includes a pressure ring, which is sleeved on the screw rod, one end of the compression spring presses on one side of the pressure ring, and the compression spring presses on the side of the left clamping plate or the right clamping plate through the pressure ring.

[0008] Beneficial effect: The compression spring is pressed against the left compression plate or the right compression plate through the compression ring, which is beneficial to the uniform transmission of the pressure of the compression spring to the side of the left compression plate or the right compression plate.

[0009] Furthermore, the locking mechanism also includes a locking nut, which is threadedly connected to the screw rod and is located on a side of the fastening nut away from the gasket.

[0010] Beneficial effect: During use, the locking nut effectively prevents the fastening nut from loosening, which is beneficial for the compression spring to press the left compression plate or the right compression plate.

[0011] Furthermore, a first flow regulating valve is provided on the high-temperature water inlet pipe, one end of the high-temperature water inlet pipe is connected to a first transfer water tank, a first exhaust pipe is provided on the top of the first transfer water tank, and a first control valve is provided on the first exhaust pipe.

[0012] Beneficial effects: A first flow regulating valve is provided to adjust the flow in the high-temperature water inlet pipe so that the high-temperature water meets the use requirements. By providing a first transfer water tank and a first exhaust pipe, when the high-temperature water flows into the first transfer water tank, the gas in the high-temperature water gathers at the top of the first transfer water tank and is discharged through the first exhaust pipe, thereby reducing the gas content in the high-temperature water entering the plate and improving the heat exchange efficiency.

[0013] Furthermore, a second flow regulating valve is provided on the low-temperature water inlet pipe, one end of the low-temperature water inlet pipe is connected to a second transfer water tank, a second exhaust pipe is provided on the top of the second transfer water tank, and a second control valve is provided on the second exhaust pipe.

[0014] Beneficial effects: A second flow regulating valve is provided to adjust the flow in the low-temperature water inlet pipe so that the low-temperature water meets the use requirements. By providing a second transfer water tank and a second exhaust pipe, when the low-temperature water flows into the second transfer water tank, the gas in the low-temperature water gathers at the top of the second transfer water tank and is discharged through the second exhaust pipe, thereby reducing the gas content in the low-temperature water entering the plate and improving the heat exchange efficiency.

[0015] Furthermore, the high-temperature water inlet pipe and the low-temperature water inlet pipe are evenly connected to a three-way pipe, the water inlet end of the three-way pipe is connected to the first transfer water tank or the second transfer water tank, the water outlet end of the three-way pipe is connected to the left clamping plate or the right clamping plate, and the free end of the three-way pipe is connected to the flushing and descaling device.

[0016] Beneficial effect: By setting up a flushing and descaling device, the plates are regularly flushed and descaled to prevent scale from affecting the heat exchange efficiency.

[0017] Furthermore, a sealing gasket is arranged in the annular groove, and the sealing gasket is glued to the inner surface of the annular groove.

[0018] Beneficial effect: By setting the sealing gasket, the sealing strength between adjacent plates is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of an embodiment of the plate heat exchange unit of the utility model;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3This is the second three-dimensional structural schematic diagram of an embodiment of the plate heat exchange unit of the utility model;

[0022] Figure 4 It is a partial cross-sectional view of an embodiment of the plate heat exchanger unit of the utility model.

[0023] Numbers in the figure: 1-placement seat, 2-left pressing plate, 3-right pressing plate, 4-plate, 5-high-temperature water inlet pipe, 6-high-temperature water outlet pipe, 7-low-temperature water inlet pipe, 8-low-temperature water outlet pipe, 9-annular boss, 10-sealing gasket, 11-screw, 12-screw head, 13-fastening nut, 14-washer ring, 15-compression spring, 16-pressure ring, 17-locking nut, 18-first flow regulating valve, 19-first transfer water tank, 20-first exhaust pipe, 21-first control valve, 22-second flow regulating valve, 23-second transfer water tank, 24-second exhaust pipe, 25-second control valve, 26-flushing and descaling device. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0025] The specific structure of the plate heat exchanger unit of the utility model is as follows Figure 1-4 As shown, it includes a placement seat 1, a left pressing plate 2, a right pressing plate 3 and a plurality of plates 4. A high-temperature water inlet pipe 5 and a high-temperature water outlet pipe 6 are arranged on the left pressing plate 2, and a low-temperature water inlet pipe 7 and a low-temperature water outlet pipe 8 are arranged on the right pressing plate 3. A plurality of plates 4 are bonded together and the two ends are bonded to the left pressing plate 2 and the right pressing plate 3 respectively; the left pressing plate 2 and the right pressing plate 3 are arranged on the placement seat 1, specifically placed on the placement seat 1. An annular groove is provided on one side of the plate 4, and an annular boss 9 is provided on the other side of the plate 4, and the shape of the annular boss 9 is adapted to the annular groove; when bonded, the annular boss 9 is inserted into the annular groove on the adjacent plate 4. In this embodiment, a sealing gasket 10 is provided in the annular groove, and the sealing gasket 10 is glued to the inner surface of the annular groove; the sealing ring is filled between the annular groove and the annular boss 9, and when bonded, the sealing strength between the adjacent plates 4 is improved.

[0026] Four sets of locking mechanisms are arranged between the left pressing plate 2 and the right pressing plate 3, and the four sets of locking mechanisms are distributed at the four corners of the left pressing plate 2 and the right pressing plate 3. The locking mechanism includes a screw 11, a screw head 12, a compression spring 15, a fastening nut 13 and a gasket 14; through holes are provided in both the left pressing plate 2 and the right rib plate. The screw head 12 is fixed to one end of the screw 11, and the screw 11 is inserted through the through hole; the compression spring 15, the gasket 14 and the fastening nut 13 are respectively sleeved on the other end of the screw 11, one end of the compression spring 15 presses on the side of the left pressing plate 2 or the right pressing plate 3, and the other end of the compression spring 15 presses on the gasket 14; the fastening nut 13 is threadedly connected to the screw 11, and in the axial direction of the screw 11, the fastening nut 13 forms a stop limit for the gasket 14.

[0027] In this embodiment, the locking mechanism further includes a pressure ring 16 and a locking nut 17. The pressure ring 16 is sleeved on the screw rod 11. One end of the compression spring 15 presses on the side of the pressure ring 16. The compression spring 15 presses on the side of the left pressing plate 2 or the right pressing plate 3 through the pressure ring 16. The pressure spring 15 presses on the left pressing plate 2 or the right pressing plate 3 through the pressure ring 16, which is conducive to the uniform transmission of the pressure of the compression spring 15 to the side of the left pressing plate 2 or the right pressing plate 3. The locking nut 17 is threadedly connected to the screw rod 11, and the locking nut 17 is located on the side of the fastening nut 13 away from the gasket 14. During use, the locking nut 17 effectively prevents the fastening nut 13 from loosening, which is conducive to the pressure of the compression spring 15 on the left pressing plate 2 or the right pressing plate 3. In other embodiments, no pressure ring is provided between the compression spring and the side of the left pressing plate or the right pressing plate, and the compression spring is directly pressed on the side of the left pressing plate or the right pressing plate.

[0028] In this embodiment, a first flow regulating valve 18 is provided on the high-temperature water inlet pipe 5, one end of the high-temperature water inlet pipe 5 is connected to the first transfer water tank 19, a first exhaust pipe 20 is provided on the top of the first transfer water tank 19, and a first control valve 21 is provided on the first exhaust pipe 20; the first flow regulating valve 18 is provided to adjust the flow in the high-temperature water inlet pipe 5 so that the high-temperature water meets the use requirements. By providing the first transfer water tank 19 and the first exhaust pipe 20, when the high-temperature water flows into the first transfer water tank 19, the gas in the high-temperature water gathers on the top of the first transfer water tank 19 and is discharged through the first exhaust pipe 20, thereby reducing the gas content in the high-temperature water entering the plate 4 and improving the heat exchange efficiency. A second flow regulating valve 22 is provided on the low-temperature water inlet pipe 7, one end of the low-temperature water inlet pipe 7 is connected to the second transfer water tank 23, a second exhaust pipe 24 is provided on the top of the second transfer water tank 23, and a second control valve 25 is provided on the second exhaust pipe 24; the second flow regulating valve 22 is provided to adjust the flow in the low-temperature water inlet pipe 7 so that the low-temperature water meets the use requirements. By providing the second transfer water tank 23 and the second exhaust pipe 24, when the low-temperature water flows into the second transfer water tank 23, the gas in the low-temperature water gathers on the top of the second transfer water tank 23 and is discharged through the second exhaust pipe 24, thereby reducing the gas content in the low-temperature water entering the plate 4 and improving the heat exchange efficiency.

[0029] In this embodiment, the high-temperature water inlet pipe 5 and the low-temperature water inlet pipe 7 are evenly three-way pipes, the water inlet end of the three-way pipe is connected to the first transfer water tank 19 or the second transfer water tank 23, the water outlet end of the three-way pipe is connected to the left pressing plate 2 or the right pressing plate 3, and the free end of the three-way pipe is connected to the flushing and descaling device 26; by setting the flushing and descaling device 26, the plate 4 is regularly flushed and descaled to prevent scale from affecting the heat exchange efficiency. In other embodiments, the high-temperature water inlet pipe and the low-temperature water inlet pipe are ordinary water pipes, and are respectively connected to the first transfer water tank or the second transfer water tank through flanges; when descaling is required, the flushing and descaling device is connected to it through a flange.

[0030] The plates 4 are adjacent to each other through the annular boss 9 and the annular groove to improve the sealing between the plates 4. The locking mechanism is set to a structure of a screw 11, a screw head 12, a compression spring 15, a fastening nut 13 and a gasket 14. Under the clamping action of the screw head 12 and the fastening nut 13, the left clamping plate 2 and the right clamping plate 3 are locked; when alternating between hot and cold occurs, the plates 4 swell when heated, push the left clamping plate 2 and the right clamping plate 3, squeeze the compression spring 15, and eliminate the deformation caused by thermal expansion; when the plates 4 shrink when cooled, the compression spring 15 presses the left clamping plate 2 or the right clamping plate 3 to eliminate the deformation caused by contraction when cooled; thereby solving the problem of loose connection and leakage between the plates 4 caused by alternating between hot and cold and thermal expansion and contraction of the plates 4.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A plate heat exchanger unit, comprising a placement seat, a left pressing plate, a right pressing plate and a plurality of plates; a high-temperature water inlet pipe and a high-temperature water outlet pipe are arranged on the left pressing plate, and a low-temperature water inlet pipe and a low-temperature water outlet pipe are arranged on the right pressing plate; a plurality of plates are attached together and the two ends are attached to the left pressing plate and the right pressing plate respectively; the left pressing plate and the right pressing plate are arranged on the placement seat; characterized in that, A ring groove is provided on one side of the plate, and an annular boss is provided on the other side of the plate, and the shape of the annular boss is adapted to the ring groove; when fitted, the annular boss is inserted into the annular groove on the adjacent plate; 4 groups of locking mechanisms are provided between the left pressure plate and the right pressure plate, and the 4 groups of locking mechanisms are distributed at four corners; the locking mechanism includes a screw, a screw head, a compression spring, a fastening nut and a gasket; through holes are provided on both the left pressure plate and the right pressure rib plate; the screw head is fixed at one end of the screw, and the screw is inserted through the through hole; the compression spring, the gasket and the fastening nut are respectively sleeved on the other end of the screw, one end of the compression spring presses on the side surface of the left pressure plate or the right pressure plate, and the other end of the compression spring presses on the gasket; the fastening nut is threadedly connected to the screw, and in the axial direction of the screw, the fastening nut forms a stop limit for the gasket.

2. The plate heat exchanger unit according to claim 1, characterized in that: The locking mechanism also includes a pressure ring, which is sleeved on the screw rod, one end of the compression spring presses on one side of the pressure ring, and the compression spring presses on the side of the left clamping plate or the right clamping plate through the pressure ring.

3. The plate heat exchanger unit according to claim 2, characterized in that: The locking mechanism also includes a locking nut, which is threadedly connected to the screw rod and is located on a side of the fastening nut away from the gasket.

4. The plate heat exchanger unit according to claim 1, characterized in that: A first flow regulating valve is arranged on the high-temperature water inlet pipe, one end of which is connected to a first transfer water tank, a first exhaust pipe is arranged on the top of the first transfer water tank, and a first control valve is arranged on the first exhaust pipe.

5. The plate heat exchanger unit according to claim 4, characterized in that: A second flow regulating valve is arranged on the low-temperature water inlet pipe, one end of the low-temperature water inlet pipe is connected to a second transfer water tank, a second exhaust pipe is arranged on the top of the second transfer water tank, and a second control valve is arranged on the second exhaust pipe.

6. The plate heat exchanger unit according to claim 5, characterized in that: The high-temperature water inlet pipe and the low-temperature water inlet pipe are evenly connected to the three-way pipe, the water inlet end of the three-way pipe is connected to the first transfer water tank or the second transfer water tank, the water outlet end of the three-way pipe is connected to the left clamping plate or the right clamping plate, and the free end of the three-way pipe is connected to the flushing and descaling device.

7. The plate heat exchanger unit according to claim 1, characterized in that: A sealing gasket is arranged in the annular groove, and the sealing gasket is glued to the inner surface of the annular groove.

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