Sealing structure of graphite heat exchanger

Abstract

The sealing structure of the graphite heat exchanger relates to the technical field of heat exchangers and comprises a positioning ring, the inner side of the positioning ring is connected with an end seat in a sliding mode in the axial direction of the positioning ring, a liquid outlet hole is formed in the middle of the end seat, an elastic sealing sleeve is arranged on the inner side of the positioning ring, a liquid storage cavity is formed in the elastic sealing sleeve, and the liquid storage cavity is communicated with the liquid outlet hole. The elastic sealing sleeve is extruded by the end seat and the positioning ring to deform and is used for realizing sealing; a movable plate is arranged at the top end of the end seat, the movable plate is in sliding connection with the positioning ring through a positioning bolt, the end, away from the positioning ring, of the positioning bolt is sleeved with a spring, and the spring acts on the movable plate to apply pressure towards the positioning ring to the movable plate. According to the sealing structure of the graphite heat exchanger, liquid leakage can be avoided due to the sealing effect of the sliding joint.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, concretely is a kind of sealing structure of graphite heat exchanger. BACKGROUND

[0002] Block-hole graphite heat exchanger is a kind of high-efficiency heat exchange equipment made of graphite material, and its structural features are that a plurality of block graphite units are arranged inside the heat exchanger, and holes are drilled on the units for fluid to pass through. Since the graphite material will expand and contract due to temperature change during use, in order to ensure the stable operation of the heat exchanger and prevent stress concentration caused by deformation, the upper end seat is usually designed to be slidingly arranged. To allow the graphite units to have a certain degree of freedom when expanding and contracting, thereby reducing the mechanical stress caused by temperature change.

[0003] In order to avoid the leakage problem caused by sliding and fluid pressure change, a sealing ring is usually provided at the sliding connection between the upper end seat and the shell. Since the sealing ring is usually made of elastic material, although it provides good sealing adaptability, it also means that the sealing ring will deform to a certain extent when the two relative slide. After experiencing multiple deformations, some areas of the sealing ring cannot fully recover and appear small gaps, causing liquid leakage.

[0004] Therefore, it is necessary to provide a sealing structure of graphite heat exchanger to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] (I) Technical problem solved

[0006] The purpose of the utility model is to provide a sealing structure of graphite heat exchanger to solve the problems raised in the background art.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented by the following technical solution: a sealing structure of graphite heat exchanger, comprising a positioning ring, an end seat is slidingly connected to the inner side of the positioning ring along its axial direction, a liquid outlet hole is formed in the middle part of the end seat, an elastic sealing sleeve is arranged on the inner side of the positioning ring, a liquid storage cavity is arranged in the elastic sealing sleeve, the elastic sealing sleeve is deformed by being pressed by the end seat and the positioning ring, and is used for sealing; an activity plate is arranged at the top end of the end seat, the activity plate is slidingly connected to the positioning ring through a positioning bolt, a spring is sleeved on the end of the positioning bolt away from the positioning ring, and the spring acts on the activity plate to exert pressure on it towards the positioning ring.

[0009] Preferably, the positioning ring comprises a first fixed ring and a second fixed ring, a positioning cylinder is arranged between the first fixed ring and the second fixed ring, and an annular cavity with an opening facing the axis is formed between the first fixed ring, the positioning cylinder and the second fixed ring.

[0010] Preferably, the first fixed ring and the second fixed ring are fixedly connected through bolts, and the second fixed ring is fixedly connected with the heat exchanger shell.

[0011] Preferably, the side adjacent to the first fixed ring and the second fixed ring is provided with a positioning groove matched with the end face of the positioning cylinder.

[0012] Preferably, one side of the elastic sealing sleeve is connected with a liquid inlet pipe, and a liquid valve is arranged on the liquid inlet pipe.

[0013] Preferably, the positioning bolt is provided in plurality, and the plurality of positioning bolts are distributed in a circumferential array along the movable plate.

[0014] Preferably, the side of the movable plate away from the end base is fixedly connected with an expansion joint, and an elastic sealing cylinder is arranged between the expansion joint and the end base.

[0015] Preferably, the top end of the end base is provided with an annular groove matched with the elastic sealing cylinder.

[0016] Preferably, the bottom end of the end base is provided with a groove, and the top end of the heat exchange block is provided with a boss matched with the groove.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the utility model provides a sealing structure of graphite heat exchanger has the following beneficial effects:

[0019] 1、 this graphite heat exchanger's sealing structure, through setting up elastic sealing sleeve, through pumping liquid into elastic sealing sleeve, make elastic sealing sleeve fill the gap between end base and positioning ring, improve its sliding joint's sealing effect, avoid liquid seepage.

[0020] 2、 this graphite heat exchanger's sealing structure, through setting up elastic sealing cylinder between expansion joint and end base, under the action of elastic sealing cylinder, improve the sealing effect of the connecting part, avoid liquid seepage between movable plate and end base. DRAWINGS

[0021] Figure 1 It is the cross section schematic view of the utility model structure;

[0022] Figure 2 It is the A place enlarged schematic view of the utility model; Figure 1

[0023] Figure 3 It is the overhead schematic view of the utility model structure.

[0024] ​In the figure: 1, expansion joint; 2, elastic sealing cylinder; 3, liquid outlet hole; 4, first fixed ring; 5, positioning cylinder; 6, elastic sealing sleeve; 7, second fixed ring; 8, heat exchanger shell; 9, positioning bolt; 10, spring; 11, movable plate; 12, end seat; 13, liquid valve; 14, heat exchange block; 15, groove; 16, boss; 17, positioning ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0026] Please refer to Figures 1-3 As shown in the figure, a sealing structure of a graphite heat exchanger comprises a positioning ring 17, the inner side of the positioning ring 17 is slidably connected with an end seat 12 along the axial direction, the middle part of the end seat 12 is provided with a liquid outlet hole 3, the inner side of the positioning ring 17 is provided with an elastic sealing sleeve 6, the inside of the elastic sealing sleeve 6 is provided with a liquid storage cavity, the elastic sealing sleeve 6 is extruded and deformed by the end seat 12 and the positioning ring 17, so as to realize sealing; the top end of the end seat 12 is provided with a movable plate 11, the movable plate 11 is slidably connected with the positioning ring 17 through a positioning bolt 9, the end of the positioning bolt 9 away from the positioning ring 17 is provided with a spring 10, and the spring 10 acts on the movable plate 11 to exert pressure on the movable plate 11 towards the positioning ring 17.

[0027] In use, the positioning ring 17 is fixed at the top end of the heat exchanger shell 8, the bottom end of the end seat 12 is connected with the top end of the heat exchange block 14, liquid is injected into the cavity, the elastic sealing sleeve 6 is expanded and deformed under the extrusion of the end seat 12 and the positioning ring 17, so as to realize sealing; when the heat exchange block 14 in the heat exchanger is heated and expanded, the heat exchange block 14 pushes the end seat 12 to move upwards, and the spring 10 is compressed under force; when the heat exchange block 14 is cooled and shrunk, the end seat 12 is reset under the action of the spring 10. By filling the gap between the end seat 12 and the positioning ring 17 with the elastic sealing sleeve 6 and through hydraulic compensation, a tiny gap is avoided, the sealing effect of the sliding connection is improved, and liquid leakage is avoided.

[0028] In order to facilitate the positioning of the elastic sealing sleeve 6, the positioning ring 17 comprises a first fixed ring 4 and a second fixed ring 7, and a positioning cylinder 5 is arranged between the first fixed ring 4 and the second fixed ring 7. Under the cooperation of the first fixed ring 4, the positioning cylinder 5 and the second fixed ring 7, an annular cavity with an opening facing the axis is formed, so as to position the elastic sealing sleeve 6.

[0029] In order to conveniently disassemble and position, the first fixing ring 4 is fixedly connected with the second fixing ring 7 through bolts, and the second fixing ring 7 is fixed with the heat exchanger shell 8 through welding. The side adjacent to the second fixing ring 7 of the first fixing ring 4 is provided with a positioning groove matched with the end face of the positioning cylinder 5. Through the positioning groove, the axial center of the positioning cylinder 5 is ensured to be collinear with the axial center of the end seat 12 under the limitation of the positioning groove, so that the positioning cylinder 5 is prevented from deviating. The bolts are multiple, and the multiple bolts are distributed in an array along the axial center of the second fixing ring 7. The positioning bolt 9 is arranged in a staggered manner with the bolts.

[0030] Specifically, one side of the elastic sealing sleeve 6 is connected with a liquid inlet pipe, and the liquid inlet pipe is provided with a liquid valve 13. The liquid inlet pipe is arranged to increase or decrease the liquid in the end seat 12, so as to adjust the liquid pressure.

[0031] Specifically, the positioning bolt 9 is multiple, and the multiple positioning bolts 9 are distributed in an array along the circumference of the movable plate 11. The multiple positioning bolts 9 and the spring 10 are arranged to balance the force acting on the movable plate 11, so that the movable plate 11 is prevented from tilting and deviating.

[0032] In some embodiments, in order to facilitate the connection with the pipeline, the side of the movable plate 11 away from the end seat 12 is fixedly connected with an expansion joint 1, and an elastic sealing cylinder 2 is arranged between the expansion joint 1 and the end seat 12. When the heat exchange block 14 expands or shrinks due to temperature change, the expansion joint 1 can absorb the size change through the expansion and contraction deformation of the bellows, so as to prevent the pipeline from being damaged due to deformation. The elastic sealing cylinder 2 is arranged to improve the sealing effect of the connection between the expansion joint 1 and the end seat 12, so as to prevent the liquid from leaking between the movable plate 11 and the end seat 12.

[0033] Specifically, the top end of the end seat 12 is provided with an annular groove matched with the elastic sealing cylinder 2. The elastic sealing cylinder 2 is limited by the annular groove, so as to enhance the stability of the connection.

[0034] In some embodiments, the bottom end of the end seat 12 is provided with a groove 15, and the top end of the heat exchange block 14 is provided with a boss 16 matched with the groove 15. The heat exchange block 14 is limited by the cooperation of the groove 15 and the boss 16, so as to prevent the heat exchange block 14 from deviating in the radial direction when it expands or shrinks, and to prevent the liquid from leaking between the end seat 12 and the heat exchange block 14.

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a graphite heat exchanger, characterized in that: The invention comprises a positioning ring (17), the inner side of the positioning ring (17) is connected to the end seat (12) in an axially sliding manner, the middle part of the end seat (12) is provided with a liquid outlet (3), the inner side of the positioning ring (17) is provided with an elastic sealing sleeve (6), the interior of the elastic sealing sleeve (6) is provided with a liquid storage cavity, and the elastic sealing sleeve (6) is squeezed and deformed by the end seat (12) and the positioning ring (17) to achieve sealing; A movable plate (11) is provided at the top end of the end seat (12), and the movable plate (11) is slidably connected to the positioning ring (17) via a positioning bolt (9). A spring (10) is sleeved on the end of the positioning bolt (9) away from the positioning ring (17), and the spring (10) acts on the movable plate (11) to apply pressure to the movable plate toward the positioning ring (17).

2. The sealing structure of a graphite heat exchanger according to claim 1, characterized in that: The positioning ring (17) comprises a first fixing ring (4) and a second fixing ring (7), a positioning cylinder (5) is provided between the first fixing ring (4) and the second fixing ring (7), and an annular cavity with an opening toward the axis is formed between the first fixing ring (4), the positioning cylinder (5) and the second fixing ring (7).

3. The sealing structure of a graphite heat exchanger according to claim 2, characterized in that: The first fixing ring (4) and the second fixing ring (7) are fixedly connected via bolts, and the second fixing ring (7) is fixedly connected to the heat exchanger housing (8).

4. The sealing structure of a graphite heat exchanger according to claim 2, characterized in that: A positioning groove adapted to the end surface of the positioning cylinder (5) is provided on one side adjacent to the first fixing ring (4) and the second fixing ring (7).

5. The sealing structure of a graphite heat exchanger according to claim 1, characterized in that: One side of the elastic sealing sleeve (6) is connected to a liquid inlet pipe, and a liquid valve (13) is provided on the liquid inlet pipe.

6. The sealing structure of a graphite heat exchanger according to claim 1, characterized in that: There are a plurality of positioning bolts (9), and the plurality of positioning bolts (9) are distributed in an array along the circumference of the movable plate (11).

7. The sealing structure of a graphite heat exchanger according to claim 1, characterized in that: An expansion joint (1) is fixedly connected to a side of the movable plate (11) away from the end seat (12), and an elastic sealing cylinder (2) is provided between the expansion joint (1) and the end seat (12).

8. The sealing structure of a graphite heat exchanger according to claim 7, characterized in that: An annular groove adapted to the elastic sealing cylinder (2) is provided at the top end of the end seat (12).

9. The sealing structure of a graphite heat exchanger according to claim 1, characterized in that: The bottom end of the end seat (12) is provided with a groove (15), and the top end of the heat exchange block (14) is provided with a boss (16) adapted to the groove (15).

Images