Countercurrent heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a countercurrent heat exchanger, which comprises a tube pass inlet cylinder, a tube pass outlet cylinder and a shell pass cylinder, an input tube is embedded on the surface of the tube pass inlet cylinder, an output tube is embedded on the surface of the tube pass outlet cylinder, the shell pass cylinder is welded between the tube pass inlet cylinder and the tube pass outlet cylinder, and the tube pass inlet cylinder and the tube pass outlet cylinder are welded together. And a heat exchange tube is embedded in the right side of the tube pass inlet cylinder. Compared with the prior art, the countercurrent heat exchanger has the advantages that the flow path of a heat exchange medium can be prolonged and the heat exchange efficiency can be improved through the baffle plates, and when the flow direction of the heat exchange medium is changed through the baffle plates, the inner wall of the shell pass barrel can be protected through the protection plates, so that the influence of impact on the inner wall of the shell pass barrel is reduced; and the protective plate is slidably connected with the shell pass barrel through the connecting rod, the sealing ring and the tension spring, and when the protective plate is impacted, the tension spring can be stretched to buffer the impact on the protective plate, so that the purpose of performing safety protection on the protective plate is achieved, and the service life of the protective plate is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and more specifically, to a counter-flow heat exchanger. Background Art

[0002] Heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid, also known as heat exchangers. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] After searching, the existing patent (publication number: CN215524298U) discloses a pure countercurrent fixed tube sheet heat exchanger. When in use, based on the tube side being air and the shell side being liquid water, the pure countercurrent process of flow is realized through the reasonable arrangement of the positions of the shell side inlet and outlet and the tube side inlet and outlet and the baffle structure; the pure countercurrent process of the flow of the shell side and tube side medium is realized through the reasonable arrangement of the positions of the shell side inlet and outlet and the tube side inlet and outlet and the baffle structure, thereby ensuring the high efficiency of the heat exchange process and fully ensuring the reasonable utilization of the shell side heat exchange space; an anti-scouring plate is arranged below the shell side inlet, which can effectively prevent the medium from directly scouring the heat exchanger and achieve the effect of protecting the inner wall of the shell side cylinder. However, in the process of realizing the present invention, the inventors discovered that the prior art had the following problems: when the existing pure countercurrent fixed tube plate heat exchanger uses an anti-scouring plate to protect the inner wall of the heat exchanger, the anti-scouring plate is easily damaged by fluid pulses due to its fixed position and lack of buffering. It has the defect of a short service life and is difficult to meet usage requirements.

[0004] Therefore, a counterflow heat exchanger is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a counter-flow heat exchanger to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a countercurrent heat exchanger, comprising a tube-side inlet cylinder, a tube-side outlet cylinder and a shell-side cylinder, an input pipe is embedded on the surface of the tube-side inlet cylinder, an output pipe is embedded on the surface of the tube-side outlet cylinder, the shell-side cylinder is welded between the tube-side inlet cylinder and the tube-side outlet cylinder, a heat exchange tube is embedded on the right side of the tube-side inlet cylinder, the outlet end of the heat exchange tube passes through the shell-side cylinder and extends to the inner cavity of the tube-side outlet cylinder, a liquid inlet pipe and a liquid outlet pipe are respectively embedded on the surface of the shell-side cylinder, a baffle is welded on the inner wall of the shell-side cylinder, the heat exchange tube is inserted on the surface of the baffle, and a guide buffer assembly is provided in the inner cavity of the shell-side cylinder corresponding to the baffle;

[0007] The flow guide buffer assembly includes a guard plate slidably connected to the inner wall of the shell-side cylinder, the side section of the guard plate is arc-shaped, and the curvature of the guard plate is adapted to the inner wall of the shell-side cylinder, a connecting rod is fixedly installed on the surface of the guard plate, a sealing ring is embedded on the surface of the shell-side cylinder, the other end of the connecting rod extends to the outer wall of the shell-side cylinder through the sealing ring, and a tension spring is fixedly installed on the surface of the connecting rod, and the other end of the tension spring is fixed to the outer wall of the shell-side cylinder.

[0008] Preferably, the flow direction of the fluid inside the heat exchange tube is opposite to the flow direction of the fluid in the inner cavity of the shell-side cylinder.

[0009] Preferably, a mounting frame is welded to the outer wall of the tube-side inlet cylinder and the tube-side outlet cylinder, and a mounting hole is opened on the surface of the mounting frame.

[0010] Preferably, there are a plurality of baffles, which are staggered and spaced apart on the upper and lower sides of the inner wall of the shell-side cylinder, and a flow gap is reserved between two adjacent baffles.

[0011] Preferably, the baffle plate at the lower side corresponds to the guard plate position at the upper side, and the baffle plate at the upper side corresponds to the guard plate position at the lower side.

[0012] Preferably, an arc-shaped guide groove is provided on one side of the guard plate facing the central axis of the shell-side cylinder.

[0013] Preferably, a fixing frame is welded to the outer wall of the shell-side cylinder, a connecting rod is slidably connected to the surface of the fixing frame, and a limiting sliding rod is welded to one end of the connecting rod outside the shell-side cylinder, and the limiting sliding rod is inserted into the surface of the fixing frame.

[0014] Technical effects and advantages of the utility model:

[0015] When the countercurrent heat exchanger is in use, the heat exchange fluid enters the interior of the tube side inlet cylinder from the input pipe, then enters the inner cavity of the tube side outlet cylinder through the heat exchange tube, and is finally discharged from the output pipe. When the heat exchange fluid passes through the interior of the heat exchange tube, the heat exchange medium flowing in the inner cavity of the shell side cylinder realizes the purpose of heat exchange with the heat exchange fluid. When the heat exchange medium flows, the flow path of the heat exchange medium can be extended by setting a baffle, thereby improving the heat exchange efficiency. When the baffle changes the flow direction of the heat exchange medium, the inner wall of the shell side cylinder can be protected by setting a guard plate, thereby reducing the impact of the impact on the inner wall of the shell side cylinder. The guard plate is slidably connected to the shell side cylinder through a connecting rod, a sealing ring and a tension spring. When the guard plate is impacted, the tension spring can be stretched to cushion the impact received by the guard plate, thereby achieving the purpose of safely protecting the guard plate and extending the service life of the guard plate.

[0016] The counter-flow heat exchanger can make the guard plate's guiding effect on the heat exchange medium smoother and more fluent by providing an arc-shaped guide groove on the surface of the guard plate; by providing a limit slide bar and a fixed frame, the limit slide bar is inserted into the surface of the fixed frame, which can achieve the effect of anti-twisting protection for the guard plate and ensure the stability of the guard plate when moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the front section structure of the utility model.

[0019] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the guard plate of the utility model.

[0021] The accompanying drawings are marked as follows: 1. tube side inlet cylinder; 2. tube side outlet cylinder; 3. shell side cylinder; 4. input pipe; 5. output pipe; 6. heat exchange tube; 7. liquid inlet pipe; 8. liquid outlet pipe; 9. baffle; 10. guard plate; 11. connecting rod; 12. sealing ring; 13. tension spring; 14. mounting bracket; 15. mounting hole; 16. arc guide groove; 17. fixing bracket; 18. limit slide bar. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] As attached Figure 1-Figure 4 The countercurrent heat exchanger shown includes a tube-side inlet cylinder 1, a tube-side outlet cylinder 2 and a shell-side cylinder 3. An input pipe 4 is embedded in the surface of the tube-side inlet cylinder 1, an output pipe 5 is embedded in the surface of the tube-side outlet cylinder 2, and the shell-side cylinder 3 is welded between the tube-side inlet cylinder 1 and the tube-side outlet cylinder 2.

[0024] A mounting frame 14 is welded to the outer wall of the pipe-side inlet cylinder 1 and the pipe-side outlet cylinder 2 , and a mounting hole 15 is opened on the surface of the mounting frame 14 .

[0025] A heat exchange tube 6 is embedded on the right side of the tube-side inlet cylinder 1, and the outlet end of the heat exchange tube 6 passes through the shell-side cylinder 3 and extends to the inner cavity of the tube-side outlet cylinder 2. A liquid inlet pipe 7 and a liquid outlet pipe 8 are embedded on the surface of the shell-side cylinder 3 respectively.

[0026] The flow direction of the fluid inside the heat exchange tube 6 is opposite to the flow direction of the fluid in the inner cavity of the shell-side cylinder 3 .

[0027] When the countercurrent heat exchanger is in use, the entire heat exchanger is first fixed using the mounting frame 14 and the mounting hole 15, the input pipe 4 and the output pipe 5 are connected to the external heat exchange fluid delivery pipeline, the liquid inlet pipe 7 and the liquid outlet pipe 8 are connected to the external heat exchange medium delivery pipeline, the heat exchange fluid enters the tube side inlet cylinder 1 from the input pipe 4, then enters the inner cavity of the tube side outlet cylinder 2 through the heat exchange pipe 6, and is finally discharged from the output pipe 5. When the heat exchange fluid passes through the heat exchange pipe 6, the heat exchange medium flowing in the inner cavity of the shell side cylinder 3 achieves the purpose of heat exchange with the heat exchange fluid.

[0028] A baffle plate 9 is welded to the inner wall of the shell-side cylinder 3 , and the heat exchange tube 6 is inserted on the surface of the baffle plate 9 .

[0029] There are a plurality of baffles 9 , which are staggered and spaced apart on the upper and lower sides of the inner wall of the shell-side cylinder 3 , and a flow gap is reserved between two adjacent baffles 9 .

[0030] Furthermore, when the heat exchange medium flows, by providing the baffle plate 9, the flow path of the heat exchange medium can be extended and the heat exchange efficiency can be improved.

[0031] The inner cavity of the shell-side cylinder 3 is provided with a flow guide buffer assembly corresponding to the baffle plate 9 .

[0032] The flow guide buffer assembly includes a guard plate 10 slidably connected to the inner wall of the shell cylinder 3, the side section of the guard plate 10 is arc-shaped, and the curvature of the guard plate 10 is adapted to the inner wall of the shell cylinder 3. The lower baffle plate 9 corresponds to the position of the guard plate 10 at the upper position, and the upper baffle plate 9 corresponds to the position of the guard plate 10 at the lower position.

[0033] A connecting rod 11 is fixedly installed on the surface of the guard plate 10, a sealing ring 12 is embedded in the surface of the shell-side cylinder 3, the other end of the connecting rod 11 extends to the outer wall of the shell-side cylinder 3 through the sealing ring 12, and a tension spring 13 is fixedly installed on the surface of the connecting rod 11, and the other end of the tension spring 13 is fixed to the outer wall of the shell-side cylinder 3.

[0034] Furthermore, when the baffle plate 9 changes the flow direction of the heat exchange medium, the inner wall of the shell-side cylinder 3 can be protected by setting the guard plate 10, thereby reducing the impact of the heat exchange medium on the inner wall of the shell-side cylinder 3. By setting the guard plate 10, the guard plate 10 is slidably connected to the shell-side cylinder 3 through the connecting rod 11, the sealing ring 12 and the tension spring 13. When the guard plate 10 is impacted, the tension spring 13 can be stretched to cushion the impact received by the guard plate 10, thereby achieving the purpose of safely protecting the guard plate 10 and extending the service life of the guard plate 10.

[0035] An arc-shaped flow guide groove 16 is formed on one side of the guard plate 10 facing the central axis of the shell-side cylinder 3 .

[0036] Furthermore, by providing an arc-shaped guide groove 16 on the surface of the guard plate 10 , the guard plate 10 can make the guide effect of the heat exchange medium smoother and more fluent.

[0037] A fixing frame 17 is welded to the outer wall of the shell-side cylinder 3 , and the connecting rod 11 is slidably connected to the surface of the fixing frame 17 . A limiting slide bar 18 is welded to one end of the connecting rod 11 outside the shell-side cylinder 3 , and the limiting slide bar 18 is inserted into the surface of the fixing frame 17 .

[0038] Furthermore, by setting the limiting slide bar 18 and the fixing frame 17, the limiting slide bar 18 is inserted into the surface of the fixing frame 17, which can achieve the effect of anti-twisting protection for the guard plate 10 and ensure the stability of the guard plate 10 when moving.

[0039] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0040] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A countercurrent heat exchanger, comprising a tube-side inlet cylinder (1), a tube-side outlet cylinder (2) and a shell-side cylinder (3), wherein an input pipe (4) is embedded on the surface of the tube-side inlet cylinder (1), and an output pipe (5) is embedded on the surface of the tube-side outlet cylinder (2), the shell-side cylinder (3) is welded between the tube-side inlet cylinder (1) and the tube-side outlet cylinder (2), a heat exchange tube (6) is embedded on the right side of the tube-side inlet cylinder (1), the outlet end of the heat exchange tube (6) passes through the shell-side cylinder (3) and extends to the inner cavity of the tube-side outlet cylinder (2), and a liquid inlet pipe (7) and a liquid outlet pipe (8) are respectively embedded on the surface of the shell-side cylinder (3), characterized in that: The inner wall of the shell-side cylinder (3) is welded with a baffle (9), the heat exchange tube (6) is inserted on the surface of the baffle (9), and the inner cavity of the shell-side cylinder (3) is provided with a flow guide buffer component corresponding to the baffle (9); The flow guide buffer assembly comprises a guard plate (10) slidably connected to the inner wall of the shell-side cylinder (3); the side section of the guard plate (10) is arc-shaped, and the curvature of the guard plate (10) is adapted to the inner wall of the shell-side cylinder (3); a connecting rod (11) is fixedly mounted on the surface of the guard plate (10); a sealing ring (12) is embedded on the surface of the shell-side cylinder (3); the other end of the connecting rod (11) extends to the outer wall of the shell-side cylinder (3) through the sealing ring (12); and a tension spring (13) is fixedly mounted on the surface of the connecting rod (11); the other end of the tension spring (13) is fixed to the outer wall of the shell-side cylinder (3).

2. The counterflow heat exchanger according to claim 1, characterized in that: The flow direction of the fluid inside the heat exchange tube (6) is opposite to the flow direction of the fluid in the inner cavity of the shell-side cylinder (3).

3. The counterflow heat exchanger according to claim 1, characterized in that: A mounting frame (14) is welded to the outer walls of the tube-side inlet cylinder (1) and the tube-side outlet cylinder (2), and a mounting hole (15) is provided on the surface of the mounting frame (14).

4. The counterflow heat exchanger according to claim 1, characterized in that: The number of the baffles (9) is several, and the several baffles (9) are arranged at intervals and in a staggered manner on the upper side and the lower side of the inner wall of the shell-side cylinder (3), and a flow gap is reserved between two adjacent baffles (9).

5. The counterflow heat exchanger according to claim 4, characterized in that: The baffle plate (9) at the lower side corresponds to the position of the guard plate (10) at the upper side, and the baffle plate (9) at the upper side corresponds to the position of the guard plate (10) at the lower side.

6. The counterflow heat exchanger according to claim 5, characterized in that: An arc-shaped flow guide groove (16) is formed on one side of the guard plate (10) facing the central axis of the shell-side cylinder (3).

7. The counterflow heat exchanger according to claim 1, characterized in that: A fixing frame (17) is welded to the outer wall of the shell-side cylinder (3), the connecting rod (11) is slidably connected to the surface of the fixing frame (17), and a limiting sliding rod (18) is welded to one end of the connecting rod (11) outside the shell-side cylinder (3), and the limiting sliding rod (18) is inserted into the surface of the fixing frame (17).

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