Novel plate tube type heat exchanger for liquefied natural gas

Abstract

The utility model discloses a novel plate tube type liquefied natural gas heat exchanger which comprises a first outer shell, a plate tube outer shell and a second outer shell, the opposite sides of the first outer shell and the second outer shell are connected through an installation mechanism, and the plate tube outer shell is installed between the first outer shell and the second outer shell. The mounting mechanism comprises a mounting rod, a sleeve, a clamping groove, a cavity, a reset spring and a clamping block. According to the novel plate and tube type liquefied natural gas heat exchanger, the mounting rods, the sleeves, the clamping grooves, the cavities, reset springs, clamping blocks, supporting legs and mounting holes are combined for use, the mounting rods are embedded into the sleeves, the clamping blocks correspond to the clamping grooves, and the clamping blocks are driven to be stably embedded into the clamping grooves under the action of the springs; according to the installation mode, operation is faster, use is more convenient, and the installation efficiency of the plate and tube heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and particularly relates to a novel plate-tube type heat exchanger for liquefied natural gas. Background Art

[0002] In the production process of liquefied natural gas (LNG), the gasification process of natural gas is involved, and heat exchange equipment is required. Currently, common heat exchangers can be divided into regenerative heat exchangers with indirect heat transfer and plate-type and tube-type heat exchangers with direct heat transfer. Among them, plate-fin heat exchangers and spiral tube heat exchangers are used more in the production process of liquefied natural gas. The plate-fin heat exchanger has high heat transfer efficiency and strong adaptability, and can be applied to heat exchange between various fluids; the spiral tube heat exchanger has high heat exchange efficiency and is structurally compact.

[0003] However, when installing these two types of heat exchangers, two outer shells are required to fix the plate tubes in an opposing manner, and the fixing method generally uses the connection of screws and nuts for installation. When installing, multiple screws and nuts need to be set for fixing. Therefore, it is more cumbersome to use during disassembly and assembly, which affects the installation method of the plate-tube type heat exchanger. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a novel plate-tube type heat exchanger for liquefied natural gas. By setting the installation rod, sleeve, card slot, chamber, return spring, block, support foot and installation hole in combination, by inserting the installation rod into the sleeve, the block corresponds to the card slot, and under the action of the spring, the block is driven to stably embed into the card slot to lock the installation rod and the sleeve, thereby installing the equipment. This installation method is more rapid in operation, more convenient to use, and improves the installation efficiency of the plate-tube type heat exchanger, etc., and solves the problems raised in the background art.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solutions: A novel plate-tube type heat exchanger for liquefied natural gas, including a first outer shell, a plate-tube outer shell and a second outer shell. The opposite sides of the first outer shell and the second outer shell are connected by an installation mechanism, and the plate-tube outer shell is installed between the first outer shell and the second outer shell;

[0008] The installation mechanism includes an installation rod, a sleeve, a card slot, a chamber, a return spring and a block. The installation rod is fixed to the outer wall and extends towards the second outer shell. A sleeve for sleeving the installation rod is fixed to the outer wall of the second outer shell. The chamber is opened on the outer wall of the installation rod. The return spring is arranged inside the chamber and one end is connected to the inner wall of the chamber and the other end is connected to the block. A card slot corresponding to the block is opened inside the sleeve.

[0009] Preferably, an inclined surface is provided at the top of the clamping block, and the inclined surface is distributed closer to the chamber side from right to left.

[0010] Preferably, four groups of supporting feet are fixed at the bottom ends of the first outer shell and the second outer shell, and the cross sections of the four groups of supporting feet are L-shaped.

[0011] Preferably, an installation hole is formed inside the supporting foot, and the installation hole is U-shaped.

[0012] Preferably, a movable plate is slidably connected to the outer wall of the sleeve, and the movable plate is connected to the outer wall of the second outer shell through a driving mechanism.

[0013] Preferably, the driving mechanism includes a threaded sleeve, a lead screw, a connecting plate and a handle. A connecting plate is fixed to the outer wall of the second outer shell, a threaded sleeve is fixed to the outer wall of the movable plate, a lead screw threadedly connected to the threaded sleeve is rotatably connected to the outer wall of the connecting plate, and a handle is fixed to the end of the lead screw away from the connecting plate.

[0014] (III) Advantageous Effects

[0015] Compared with the prior art, the present utility model has the following advantageous effects:

[0016] 1. By using the combination of the installation rod, the sleeve, the card slot, the chamber, the return spring, the clamping block, the supporting foot and the installation hole, by inserting the installation rod into the sleeve, the clamping block is aligned with the card slot, and under the action of the spring, the clamping block is stably inserted into the card slot to lock the installation rod and the sleeve, thereby installing the device. This installation method is more rapid and convenient to use, improving the installation efficiency of the plate-tube heat exchanger.

[0017] 2. By using the combination of the movable plate, the threaded sleeve, the lead screw, the connecting plate and the handle, by rotating the handle to rotate the lead screw, under the action of the thread, the movable plate slides horizontally along the sleeve, and the movable plate can abut against the clamping block to drive the clamping block to disengage from the card slot. This method can conveniently disassemble multiple clamping blocks from the card slots, and the disassembly purpose can be achieved by pulling the first outer shell, which is convenient for a single worker to perform disassembly and assembly operations and reduces the labor cost of device disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 is a sectional structural schematic diagram of the installation rod of the present utility model;

[0020] Figure 3 is of the present utility model Figure 2 is an enlarged structural schematic diagram at A in

[0021] Figure 4 This is a schematic diagram of the support foot structure of the present utility model.

[0022] In the figure: 1. First outer shell; 2. Plate tube outer shell; 3. Second outer shell; 411. Mounting rod; 412. Sleeve; 413. Card slot; 414. Chamber; 415. Return spring; 416. Block; 417. Support foot; 418. Mounting hole; 511. Movable plate; 512. Threaded sleeve; 513. Lead screw; 514. Connecting plate; 515. Handle. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment

[0025] Referring to Figures 1-4 As shown, a new type of plate-tube liquefied natural gas heat exchanger includes a first outer shell 1, a plate tube outer shell 2 and a second outer shell 3. One opposite side of the first outer shell 1 and the second outer shell 3 is connected by a mounting mechanism. The plate tube outer shell 2 is installed between the first outer shell 1 and the second outer shell 3. The plate tube outer shell 2 can be fixedly connected to the second outer shell 3, and the installation of the first outer shell 1 and the second outer shell 3 is used to combine the equipment.

[0026] The installation mechanism includes an installation rod 411, a sleeve 412, a card slot 413, a chamber 414, a return spring 415 and a latch 416. The installation rod 411 is fixed to the outer wall and extends towards the second housing 3. A sleeve 412 sleeving the installation rod 411 is fixed to the outer wall of the second housing 3. A chamber 414 is formed on the outer wall of the installation rod 411. The return spring 415 is arranged inside the chamber 414, with one end connected to the inner wall of the chamber 414 and the other end connected to the latch 416. A card slot 413 corresponding to the latch 416 is formed inside the sleeve 412. By attaching the first housing 1 to the plate-tube housing 2, at this time, the installation rod 411 can be inserted into the sleeve 412. Then, by pressing the latch 416 to make it retract into the chamber 414, the return spring 415 is driven to compress. When the latch 416 aligns with the card slot 413, under the elasticity of the return spring 415, the latch 416 can be driven to insert into the card slot 413 to lock the installation rod 411 and the sleeve 412, achieving the function of installing the first housing 1, the plate-tube housing 2 and the second housing 3. The top of the latch 416 is provided with an inclined surface, which is distributed towards the side of the chamber 414 from right to left. The inclined surface can achieve a better guiding effect. When the installation rod 411 is inserted into the sleeve 412, the inclined surface on the latch 416 will contact the outer wall of the sleeve 412, driving the latch 416 to automatically retract into the chamber 414. This operation is more time-saving and labor-saving.

[0027] A movable plate 511 is slidably connected to the outer wall of the sleeve 412. The movable plate 511 is connected to the outer wall of the second housing 3 through a driving mechanism. When the movable plate 511 slides along the outer wall of the sleeve 412, it can contact the inclined surface on the latch 416, causing the latch 416 to insert into the chamber 414. In this way, each latch 416 can be completely contacted and fixed, facilitating a single worker to disassemble and assemble the heat exchanger.

[0028] The driving mechanism includes a threaded sleeve 512, a lead screw 513, a connecting plate 514 and a handle 515. A connecting plate 514 is fixed to the outer wall of the second housing 3. A threaded sleeve 512 is fixed to the outer wall of the movable plate 511. A lead screw 513 threadedly connected to the threaded sleeve 512 is rotatably connected to the outer wall of the connecting plate 514. A handle 515 is fixed to the end of the lead screw 513 away from the connecting plate 514. After rotating the handle 515, the lead screw 513 rotates. Under the action of the thread, the threaded sleeve 512 and the movable plate 511 slide horizontally. The movable plate 511 can be located on top of the latch 416 to restrict the latch 416 from extending out of the chamber 414, facilitating the disassembly and assembly of the first housing 1, the plate-tube housing 2 and the second housing 3.

[0029] Four sets of support feet 417 are fixed to the bottom ends of the first outer casing 1 and the second outer casing 3. The cross-section of the four sets of support feet 417 is L-shaped. By providing the four sets of support feet 417, better support can be achieved to ensure the stable operation of the heat exchanger. An installation hole 418 is formed inside the support foot 417. The installation hole 418 is U-shaped. The U-shaped installation hole 418 can be positioned and fixed with installation parts such as bolts or screws to improve the stability effect of the heat exchanger.

[0030] Working principle: When the first outer casing 1, the plate-tube casing 2, and the second outer casing 3 need to be installed, place the plate-tube casing 2 between the first outer casing 1 and the second outer casing 3. By pushing the first outer casing 1 towards the second outer casing 3, the installation rod 411 is inserted into the inside of the sleeve 412. At this time, the inclined surface on the latch 416 can abut against the outer wall of the sleeve 412, causing the latch 416 to be inserted into the chamber 414, driving the compression of the return spring 415. When the latch 416 corresponds to the card slot 413, under the elastic action of the return spring 415, the latch 416 is driven to penetrate through the card slot 413, achieving the purpose of installing the first outer casing 1, the plate-tube casing 2, and the second outer casing 3.

[0031] When the first outer casing 1, the plate-tube casing 2, and the second outer casing 3 need to be disassembled, rotate the handle 515 to rotate the lead screw 513. Under the action of the thread, the thread sleeve 512 and the movable plate 511 are driven to move horizontally. The movable plate 511 can abut against the inclined surface on the latch 416 again, and the latch 416 is received into the chamber 414. The latch 416 will disengage from the inside of the card slot 413. At this time, the second outer casing 3 can be pulled outwards to disassemble the first outer casing 1, the plate-tube casing 2, and the second outer casing 3.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel plate-tube type liquefied natural gas heat exchanger, comprising a first outer shell (1), a plate-tube outer shell (2) and a second outer shell (3), characterized in that: The first outer shell (1) and the second outer shell (3) are connected at opposite sides via a mounting mechanism, and the plate-tube outer shell (2) is mounted between the first outer shell (1) and the second outer shell (3); The mounting mechanism comprises a mounting rod (411), a sleeve (412), a slot (413), a chamber (414), a return spring (415) and a block (416); the mounting rod (411) is fixed to the outer wall and extends toward one side of the second outer shell (3); the outer wall of the second outer shell (3) is fixed with a sleeve (412) sleeved with the mounting rod (411); the chamber (414) is opened on the outer wall of the mounting rod (411); the return spring (415) is arranged inside the chamber (414) and one end is connected to the inner wall of the chamber (414) and the other end is connected to the block (416); the sleeve (412) is opened inside with a slot (413) corresponding to the block (416).

2. The novel plate-and-tube liquefied natural gas heat exchanger according to claim 1 is characterized in that: The top of the block (416) is provided with an inclined surface, and the inclined surface is distributed from right to left close to one side of the chamber (414).

3. The novel plate-tube liquefied natural gas heat exchanger according to claim 1 is characterized in that: Four groups of supporting feet (417) are fixed to the bottom ends of the first outer shell (1) and the second outer shell (3), and the cross-sections of the four groups of supporting feet (417) are arranged in an L shape.

4. A novel plate-and-tube liquefied natural gas heat exchanger according to claim 3, characterized in that: A mounting hole (418) is provided inside the supporting foot (417), and the mounting hole (418) is U-shaped.

5. The novel plate-and-tube liquefied natural gas heat exchanger according to claim 2 is characterized in that: The outer wall of the sleeve (412) is slidably connected to a movable plate (511), and the movable plate (511) is connected to the outer wall of the second outer shell (3) via a driving mechanism.

6. The novel plate-and-tube liquefied natural gas heat exchanger according to claim 5 is characterized in that: The driving mechanism comprises a threaded sleeve (512), a screw rod (513), a connecting plate (514) and a handle (515); the connecting plate (514) is fixed to the outer wall of the second outer shell (3); the threaded sleeve (512) is fixed to the outer wall of the movable plate (511); the outer wall of the connecting plate (514) is rotatably connected to a screw rod (513) threadedly connected to the threaded sleeve (512); and the handle (515) is fixed to one end of the screw rod (513) away from the connecting plate (514).

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