A plate heat exchanger

Abstract

The application discloses a plate-and-shell heat exchanger which comprises a shell, an opening is arranged at one end of the shell, a cover plate covering the opening is arranged at the opening, the cover plate is provided with a second step portion, the second step portion is in contact with the outer wall of the shell, the second step portion is connected with a rotatable limiting ring, the limiting ring is provided with a first limiting block extending towards the outer wall of the shell, the outer wall of the shell is provided with a second limiting block, the lower end surface of the second limiting block is provided with a first inclined surface, the first limiting block rotates along with the limiting ring and moves along the first inclined surface to the lower side of the second limiting block and abuts against the lower end surface of the second limiting block. The rotation of the limiting ring can drive the rotation of the first limiting block so that the first limiting block abuts against the second limiting block, thereby ensuring the stability of the connection between the cover plate and the shell, and the connection between the cover plate and the shell can be locked or unlocked only by rotating the limiting ring, so that the cover plate is convenient to disassemble and assemble, thereby facilitating the cleaning of the internal structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a plate-and-shell heat exchanger. BACKGROUND

[0002] Heat exchange between different media occurs in the heat exchanger, and the interior of the heat exchanger needs to be cleaned when the medium is replaced. The existing cover plate installed at the end of the heat exchanger is usually connected with the shell of the heat exchanger through a flange structure, and the flange joint needs to be disassembled when the internal structure needs to be cleaned, which is relatively cumbersome. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a plate-and-shell heat exchanger with convenient cover plate disassembly and assembly.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a plate-and-shell heat exchanger, comprising a shell, one end of the shell is provided with an opening, a cover plate covering the opening is arranged at the opening, the cover plate is provided with a second stepped portion, the second stepped portion is in contact with the outer wall of the shell, the second stepped portion is connected with a rotatable limiting ring, the limiting ring is provided with a first limiting block extending towards the outer wall of the shell, the outer wall of the shell is provided with a second limiting block, the lower end surface of the second limiting block is provided with a first inclined surface, the first limiting block rotates with the limiting ring and moves along the first inclined surface to below the second limiting block and abuts against the lower end surface of the second limiting block.

[0005] Further, the outer wall of the shell is provided with a first guide groove, the second limiting block is provided with a first guide block embedded in the first guide groove, the first guide groove is provided with a first spring, the first spring pushes the first guide block to move downward.

[0006] Further, the side wall of the shell is provided with an expansion slot penetrating through the side wall of the shell, the expansion slot is provided with a movable first positioning rod, the cover plate is provided with a first positioning slot corresponding to the position of the first positioning rod, the first positioning rod is inserted into the first positioning slot to limit the movement of the cover plate.

[0007] Further, the side wall of the expansion slot is provided with a second guide groove, the first positioning rod is provided with a second guide block embedded in the second guide groove, the second guide groove is provided with a second spring pushing the second guide block to move outward of the shell.

[0008] Further, the outer wall of the shell is connected with a supporting ring, the supporting ring is provided with a movable third limiting block, one side of the third limiting block towards the shell is provided with a second inclined surface, the second inclined surface abuts against the first positioning rod.

[0009] Further, the upper end surface of the third limiting block is provided with a third inclined surface, the first limiting block rotates along with the limiting ring and moves along the third inclined surface to above the third limiting block and abuts against the upper end surface of the third limiting block.

[0010] Further, the supporting ring comprises a first ring body connected to the shell and a second ring body connected to the first ring body, the first ring body is provided with a second positioning rod extending towards the third limiting block, the third limiting block is provided with a second positioning groove corresponding to the position of the second positioning rod, the second positioning rod is inserted into the second positioning groove, the second positioning rod is sleeved with a third spring, and two ends of the third spring abut against the third limiting block and the first ring body respectively.

[0011] Further, the second ring body is provided with a third guide groove, and the third limiting block is provided with a third guide block embedded in the third guide groove.

[0012] Further, the cover plate is provided with a first sealing part embedded in the opening, the inner wall of the shell is provided with a first step part, the first step part is provided with a sealing groove, a sealing ring is embedded in the sealing groove, and the first sealing part abuts against the sealing ring.

[0013] In summary, the present application has the following beneficial effects:

[0014] 1. The cover plate is connected with a rotatable limiting ring, the limiting ring is provided with a first limiting block, the shell is provided with a second limiting block, the rotation of the limiting ring can drive the first limiting block to rotate, so that the first limiting block abuts against the second limiting block, thereby ensuring the stability of the connection between the cover plate and the shell, and only the rotation of the limiting ring is needed to lock or unlock the connection between the cover plate and the shell, which facilitates the disassembly and assembly of the cover plate and the cleaning of the internal structure.

[0015] 2. The shell is provided with a supporting ring outside, the supporting ring is provided with a third limiting block, a first positioning rod is arranged on the shell, and a first positioning groove is arranged on the cover plate, the first limiting block can drive the third limiting block to move, the movement of the third limiting block can drive the movement of the first positioning rod, so that the first positioning rod is inserted into or pulled out of the first positioning groove, thereby realizing the locking or unlocking of the cover plate and further enhancing the stability of the connection between the cover plate and the shell. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the present application;

[0017] Figure 2 is a structural schematic view of the separation of the cover plate and the shell;

[0018] Figure 3 is Figure 2Enlarged view at B;

[0019] Figure 4 For Figure 2 Enlarged view at C;

[0020] Figure 5 Structure diagram of the inside of the shell;

[0021] Figure 6 For Figure 5 Enlarged view at C;

[0022] The figure marks: shell 100, opening 101, telescopic groove 102, heat exchange element 103, mounting rod 104, first connecting port 110, first step part 120, sealing groove 121, sealing ring 122, first guide groove 130, first guide rod 131, first spring 132, second guide groove 140, second guide rod 141, second spring 142, cover plate 200, handle 201, second step part 202, second connecting port 210, first sealing part 220, second sealing part 230, first positioning groove 231, limiting ring 300, bearing 310, first limiting block 320, supporting ring 400, first ring body 410, second ring body 420, second positioning rod 411, third spring 412, second ring body 420, third guide groove 421, second limiting block 500, first guide block 501, first inclined surface 510, third limiting block 600, second inclined surface 610, third inclined surface 620, third guide block 630, second positioning groove 640, first positioning rod 700, second guide block 710. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0024] Reference Figures 1 to 6The embodiment discloses a plate shell heat exchanger, which comprises a shell 100, one end of the shell 100 is provided with an opening 101, the opening 101 is provided with a cover plate 200 covering the opening 101. The bottom of the shell 100 is inserted with a mounting rod 104, and the other end of the mounting rod 104 is inserted and matched with the cover plate 200. A plurality of equidistantly arranged heat exchange elements 103 are connected on the mounting rod 104, the heat exchange element 103 is composed of two plate pieces, the edges of the two plate pieces are connected in a welded manner and a hole is formed in the middle for the mounting rod 104 to pass through. The shell 100 is connected with two first connecting ports 110, and the two first connecting ports 110 are respectively a shell side inlet and a shell side outlet. The cover plate 200 is connected with two second connecting ports 210, and the two second connecting ports 210 are respectively a plate side inlet and a plate side outlet.

[0025] The cover plate 200 is provided with a first sealing portion 220 embedded in the opening 101, and the inner wall of the shell 100 is provided with a first step portion 120, the first step portion 120 is provided with a sealing groove 121, a sealing ring 122 is embedded in the sealing groove 121, and the first sealing portion 220 abuts against the sealing ring 122. The sealing ring 122 is made of rubber and has elasticity, and part of the sealing ring 122 protrudes outside the sealing groove 121 when the sealing ring 122 is embedded in the sealing groove 121. When the cover plate 200 is installed in the opening 101, the first sealing portion 220 abuts against the first step portion 120, so that the first sealing portion 220 can extrude the sealing ring 122 to make the sealing ring 122 deform, thereby filling the gap between the sealing groove 121 and the first sealing portion 220 and ensuring the sealing capacity of the cover plate 200 for the opening 101.

[0026] The edge of the cover plate 200 is provided with a second step portion 202, which extends towards the shell 100, so that when the cover plate 200 is installed in the opening 101, the inner wall of the second step portion 202 abuts against the outer wall of the shell 100, thereby enhancing the stability of the connection between the shell 100 and the cover plate 200. The outer wall of the second step portion 202 is connected with a limiting ring 300 through a bearing 310, so that the limiting ring 300 can rotate relative to the second step portion 202, and a handle 201 is arranged on the outer wall of the limiting ring 300, which can facilitate the rotation of the limiting ring 300. One end of the limiting ring 300 towards the shell 100 is connected with a first limiting block 320 extending towards the outer wall of the shell 100, and the outer wall of the shell 100 is provided with a second limiting block 500. The outer wall of the shell 100 is provided with a first guide groove 130, the first guide groove 130 is provided with a first guide rod 131, the second limiting block 500 is provided with a first guide block 501 embedded in the first guide groove 130, the first guide rod 131 passes through the first guide block 501, which can prevent the first guide block 501 from moving and deviating, and the first guide groove 130 is provided with a first spring 132, the first spring 132 is sleeved on the first guide rod 131, and the first spring 132 can push the first guide block 501 to move downward.

[0027] The lower end surface of the second limiting block 500 is provided with a first inclined surface 510. In normal state, the second limiting block 500 is arranged in staggered relation with the first limiting block 320 in up-down direction. The second limiting block 500 is slightly higher than the first limiting block 320, so that the first limiting block 320 can be in contact with the first inclined surface 510. After the first sealing part 220 is embedded into the opening 101, the rotation of the limiting ring 300 can drive the rotation of the first limiting block 320. When the first limiting block 320 collides with the second limiting block 500, the first limiting block 320 moves along the first inclined surface 510 to the lower side of the second limiting block 500. Under the action of the first spring 132, the first limiting block 320 keeps abutting against the second limiting block 500, thereby ensuring the stability of the connection between the cover plate 200 and the shell 100.

[0028] The side wall of the shell 100 is provided with an extension slot 102 arranged in penetrating manner. The extension slot 102 is provided with a first positioning rod 700. The side wall of the extension slot 102 is provided with a second guide slot 140. The second guide slot 140 is provided with a second guide rod 141. The first positioning rod 700 is provided with a second guide block 710 embedded into the second guide slot 140. The second guide rod 141 passes through the second guide block 710, so that the second guide block 710 cannot be deviated when it moves. The second guide slot 140 is provided with a second spring 142 sleeved on the second guide rod 141. The two ends of the second spring 142 are respectively in abutment with the second guide block 710 and the end of the second guide slot 140 facing the inside of the shell 100, so that the second guide block 710 and the first positioning rod 700 can be pushed to move to the outside of the shell 100. The first sealing part 220 is provided with a second sealing part 230 extending downward. The second sealing part 230 is in abutment with the inner wall of the first stepped part 120, so as to ensure the sealing performance. The side wall of the second sealing part 230 is provided with a first positioning slot 231 corresponding to the position of the first positioning rod 700. When the first positioning rod 700 is inserted into the first positioning slot 231, the movement of the cover plate 200 can be limited, so as to ensure the stability of the connection between the cover plate 200 and the shell 100 and the sealing performance.

[0029] The outer wall of the shell 100 is connected with a supporting ring 400. The supporting ring 400 is provided with a movable third limiting block 600. The side of the third limiting block 600 facing the shell 100 is provided with a second inclined surface 610. The second inclined surface 610 is in abutment with the first positioning rod 700. The movement of the third limiting block 600 can drive the movement of the first positioning rod 700, so that the first positioning rod 700 can be inserted into or pulled out of the first positioning slot 231, thereby realizing the locking and unlocking of the cover plate 200.

[0030] The support ring 400 comprises a first ring body 410 connected with the shell 100 and a second ring body 420 connected with the first ring body 410, the first ring body 410 is provided with a second positioning rod 411 extending towards the third limiting block 600, the third limiting block 600 is provided with a second positioning groove 640 corresponding to the position of the second positioning rod 411, the second positioning rod 411 is inserted into the second positioning groove 640, the second positioning rod 411 is sleeved with a third spring 412, two ends of the third spring 412 abut against the third limiting block 600 and the first ring body 410 respectively, so that the third limiting block 600 can be pushed to move towards the first limiting block 320. Meanwhile, the second ring body 420 is provided with a third guide groove 421, the third limiting block 600 is provided with a third guide block 630 embedded in the third guide groove 421, through the cooperation of the third guide groove 421 and the third guide block 630, the third guide block 630 can be prevented from deviating when moving, and the stability of the movement of the third guide block 630 is ensured.

[0031] The third limiting block 600 is arranged in an up-down staggered manner with the first limiting block 320, the first limiting block 320 is slightly higher than the third limiting block 600, and the upper end surface of the third limiting block 600 is provided with a third inclined surface 620. When the first limiting block 320 collides with the third limiting block 600 when the limiting ring 300 rotates, the first limiting block 320 moves along the third inclined surface 620 to above the third limiting block 600, so that the first limiting block 320 pushes the third limiting block 600 to move downward, thereby pushing the first positioning rod 700 to move, and under the action of the third spring 412, the third limiting block 600 abuts against the first limiting block 320, so that the first positioning rod 700 remains in the state of being inserted into the first positioning groove 231, thereby locking the cover plate 200.

[0032] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned examples only, any technical scheme belonging to the idea of the present application is within the protection scope of the present application. It should be noted that for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A plate heat exchanger, characterized in that The utility model provides a shell (100) is provided with an opening (101) at one end, the opening (101) is provided with a cover plate (200) covering the opening (101), the cover plate (200) is provided with a second step portion (202), the second step portion (202) is in contact with the outer wall of the shell (100), the second step portion (202) is connected with rotatable limiting ring (300), the limiting ring (300) is provided with the first limiting block (320) extending towards the outer wall of the shell (100), the outer wall of the shell (100) is provided with the second limiting block (500), the lower end surface of the second limiting block (500) is provided with the first inclined plane (510), the first limiting block (320) rotates along with the limiting ring (300) and moves to the lower side of the second limiting block (500) and abuts with the lower end surface of the second limiting block (500) along the first inclined plane (510); The side wall of the shell (100) is provided with a telescopic slot (102) penetrating through, the telescopic slot (102) is provided with a movable first positioning rod (700), the cover plate (200) is provided with a first positioning slot (231) corresponding to the position of the first positioning rod (700), and the first positioning rod (700) is inserted into the first positioning slot (231) to limit the movement of the cover plate (200); The side wall of the telescopic slot (102) is provided with a second guide slot (140), the first positioning rod (700) is provided with a second guide block (710) embedded in the second guide slot (140), and the second guide slot (140) is provided with a second spring (142) for moving the second guide block (710) to the outside of the shell (100); The outer wall of the shell (100) is connected with a supporting ring (400), the supporting ring (400) is provided with a movable third limiting block (600), one side of the third limiting block (600) towards the shell (100) is provided with a second inclined plane (610), and the second inclined plane (610) abuts with the first positioning rod (700); The upper end surface of the third limiting block (600) is provided with a third inclined plane (620), the first limiting block (320) rotates along with the limiting ring (300) and moves to the upper side of the third limiting block (600) and abuts with the upper end surface of the third limiting block (600) along the third inclined plane (620). The support ring (400) comprises a first ring body (410) connected with the shell (100) and a second ring body (420) connected with the first ring body (410), the first ring body (410) is provided with a second positioning rod (411) extending towards the third limiting block (600), the third limiting block (600) is provided with a second positioning groove (640) corresponding in position to the second positioning rod (411), the second positioning rod (411) is inserted into the second positioning groove (640), and the second positioning rod (411) is sleeved with a third spring (412), and two ends of the third spring (412) abut against the third limiting block (600) and the first ring body (410) respectively.

2. A plate heat exchanger according to claim 1, characterised in that An outer wall of the shell (100) is provided with a first guide groove (130), the second limiting block (500) is provided with a first guide block (501) embedded in the first guide groove (130), and a first spring (132) is arranged in the first guide groove (130) and pushes the first guide block (501) to move downwards.

3. A plate heat exchanger according to claim 1, characterised in that The second ring body (420) is provided with a third guide groove (421), and the third limiting block (600) is provided with a third guide block (630) embedded in the third guide groove (421).

4. A plate heat exchanger according to claim 1, characterised in that The cover plate (200) is provided with a first sealing portion (220) embedded in the opening (101), an inner wall of the shell (100) is provided with a first step portion (120), the first step portion (120) is provided with a sealing groove (121), a sealing ring (122) is embedded in the sealing groove (121), and the first sealing portion (220) abuts against the sealing ring (122).

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