Sealing connection structure for water inlet of heat exchanger

Abstract

The utility model belongs to the technical field of pipeline connection, and particularly relates to a heat exchanger water inlet sealing connection structure which comprises a heat exchanger plate body. The end part of the heat exchanger plate body is fixedly connected with a water inlet pipe; the middle of the water inlet pipe is in threaded connection with a lower flange plate pipeline; the end part of the lower flange plate pipeline is fixedly connected with a lower fixing sleeve block; wave spring sets are fixedly connected to the two sides of the end of the lower fixing sleeve block. The end part of the wave spring group is fixedly connected with a sleeving block; steering grooves are formed in two sides of the end part of the lower fixing sleeve block; an upper flange plate pipeline is arranged at the top of the lower fixing sleeve block; the end part of the upper flange plate pipeline is fixedly connected with an upper fixing sleeve block; the two sides of the end of the upper fixing sleeve block are rotationally connected with fixing rotating blocks. And in the step, after the lower flange plate pipeline is connected with the water inlet pipe, the upper flange plate pipeline is moved, so that the end part of the fixed rotating block is sleeved on the inner side wall of the sleeving block.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline connection technology, specifically a sealing connection structure for a heat exchanger inlet. Background Technology

[0002] Heat exchangers in HVAC systems are used to connect to inlet pipes for domestic hot water, chilled water, etc. This sealed connection structure ensures stable system operation and meets the heating and cooling needs of the building.

[0003] The heat exchanger inlet sealing connection structure consists of an inlet pipe, one end of which is connected to an external water supply pipeline, and the other end is connected to the inlet chamber of the heat exchanger. The connection is made by a flange, and a sealing component is provided at the end of the flange.

[0004] Currently, through long-term observation and use, it has been found that when water enters the heat exchanger through the flange connection structure, the flange must first withstand the internal pressure of the water. When the pressure is too high or the pressure fluctuates frequently, the flange connection may become loose, which may lead to water leakage. Therefore, a sealing connection structure for the heat exchanger inlet is proposed to address the above problem. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a heat exchanger inlet sealing connection structure.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A heat exchanger inlet sealing connection structure of this utility model includes a heat exchanger plate; an inlet pipe is fixedly connected to the end of the heat exchanger plate; a lower flange pipe is threadedly connected to the middle of the inlet pipe; a lower fixing sleeve is fixedly connected to the end of the lower flange pipe; wave spring assemblies are fixedly connected to both sides of the end of the lower fixing sleeve; a fitting block is fixedly connected to the end of the wave spring assembly; a turning groove is opened on both sides of the end of the lower fixing sleeve; an upper flange pipe is provided on the top of the lower fixing sleeve; an upper fixing sleeve is fixedly connected to the end of the upper flange pipe; and fixed rotating blocks are rotatably connected to both sides of the end of the upper fixing sleeve.

[0007] Preferably, a guide plate is rotatably connected to the middle of the upper flange pipe; multiple sets of guide rail holes are opened in the middle of the guide plate; a guide rail disc is fixedly connected to the middle of the upper flange pipe; multiple sets of expansion holes are opened in the middle of the guide rail disc; a linkage rod is slidably connected in the guide rail hole; a linkage rod is slidably connected in the expansion hole; a closing block is fixedly connected to the end of the linkage rod; and a water pipe is detachably connected to the end of the upper flange pipe.

[0008] Preferably, a rubber sleeve is slidably connected to the middle of the upper flange pipe; multiple sets of positioning blocks are fixedly connected to the end of the rubber sleeve; a spring strip is fixedly connected to the middle of the positioning block; a pressure-bearing hollow column is fixedly connected to the end of the spring strip; and the pressure-bearing hollow column is fixedly connected to the middle of the guide rail plate.

[0009] Preferably, a convex sealing gasket is fixedly connected to the end of the inlet pipe; and a concave sealing gasket is fixedly connected to the end of the lower flange pipe.

[0010] Preferably, the upper flange pipe end has a first rubber ring at a fixed distance; the lower flange pipe end has a filling groove; and the filling groove has a second rubber ring inside.

[0011] Preferably, a damping column is fixedly connected to the end of the spring bar.

[0012] Preferably, a limit post is fixedly connected to the end of the guide disc.

[0013] The beneficial effects of this utility model are:

[0014] This utility model provides a sealing connection structure for a heat exchanger inlet. Through the use of a lower fixed sleeve and an upper fixed sleeve, after connecting the lower flange pipe to the inlet pipe, the upper flange pipe is moved so that the end of the fixed rotating block fits onto the inner wall of the sleeve. Then, the upper flange pipe is placed on top of the lower flange pipe, aligned with the threaded holes of the upper and lower flange pipes, and connected with a nut. At this point, the handle of the fixed rotating block is pressed down to the turning groove of the lower flange pipe, and the handle is rotated to the side wall of the turning groove. When the fixed rotating block is pressed down, pressure is applied to the wave spring assembly through the sleeve, compressing the wave spring assembly. When the handle of the fixed rotating block is locked at the side wall of the turning groove, the wave spring assembly generates an upward force on the fixed rotating block, fixing the handle of the fixed rotating block at the turning groove of the lower flange pipe. This ensures a tight fixation between the lower and upper flange pipes, reducing the pressure generated during water intake and minimizing flange loosening, thus reducing water leakage.

[0015] This utility model provides a sealing connection structure for the inlet of a heat exchanger. Through the setting of a linkage rod and a closing block, and guided by the rotating guide plate and the guide rail hole, the linkage rod can slide back and forth at the expansion hole, while simultaneously driving the closing block to slide. When the water pipe is connected to the inlet end of the upper flange pipe, the compression action of the closing block on the water pipe by the convex sealing gasket group can reduce the gap generated between the water pipe and the upper flange pipe, thereby reducing the phenomenon of water seeping out from the connection between the upper flange pipe and the water pipe during water intake. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0017] In the attached diagram:

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the heat exchanger plate in this utility model;

[0020] Figure 3 This is a perspective view of the lower flange pipe in this utility model;

[0021] Figure 4 This is a perspective view of the fixed rotating block in this utility model;

[0022] Figure 5 This is a perspective view of the rubber sleeve block in this utility model;

[0023] Figure 6 This is a perspective view of the guide plate in this utility model.

[0024] Legend:

[0025] 1. Heat exchanger plate; 11. Inlet pipe; 12. Lower flange pipe; 13. Lower fixed sleeve; 14. Wave spring assembly; 15. Fitting block; 16. Turning groove; 17. Upper flange pipe; 18. Upper fixed sleeve; 19. Fixed rotating block; 2. Guide plate; 21. Guide rail hole; 22. Guide rail plate; 23. Expansion hole; 24. Linkage rod; 25. Closing block; 26. Water guide pipe; 3. Rubber sleeve; 31. Positioning block; 32. Spring strip; 33. Pressure-bearing hollow column; 4. Convex sealing gasket; 41. Concave sealing gasket; 5. First rubber ring; 51. Filling groove; 52. Second rubber ring; 6. Damping column; 7. Limiting column. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Specific implementation examples are given below.

[0028] Please see Figure 1 , Figure 2 , Figure 4 This utility model provides a heat exchanger inlet sealing connection structure, including a heat exchanger plate 1; an inlet pipe 11 is fixedly connected to the end of the heat exchanger plate 1; a lower flange pipe 12 is threadedly connected to the middle of the inlet pipe 11; a lower fixing sleeve block 13 is fixedly connected to the end of the lower flange pipe 12; wave spring assemblies 14 are fixedly connected to both sides of the end of the lower fixing sleeve block 13; a fitting block 15 is fixedly connected to the end of the wave spring assemblies 14; a turning groove 16 is opened on both sides of the end of the lower fixing sleeve block 13; an upper flange pipe 17 is provided on the top of the lower fixing sleeve block 13; an upper fixing sleeve block 18 is fixedly connected to the end of the upper flange pipe 17; and fixed rotating blocks 19 are rotatably connected to both sides of the end of the upper fixing sleeve block 18. During operation, first connect the lower flange pipe 12 to the inlet pipe 11 using threads to ensure a tight fit between them. Then, move the upper flange pipe 17 so that the lower end of the fixed rotating block 19 engages with the inner wall of the fitting block 15. Next, align the threaded holes of the upper flange pipe 17 and the lower flange pipe 12, place the upper flange pipe 17 on top of the lower flange pipe 12, and connect them using nuts. At this time, the fixed rotating block 19 applies a downward force to the wave spring assembly 14 through the fitting block 15, compressing the wave spring assembly 14. Then, the handle of the fixed rotating block 19 is pressed down and rotated to rotate the handle of the fixed rotating block 19 to the side wall of the turning groove 16 on the lower flange pipe 12, so that the lower flange pipe 12 and the upper flange pipe 17 can be fixedly closed. This step is performed after the lower flange pipe 12 is connected to the inlet pipe 11, and the upper flange pipe 17 is moved to fix the connection. The end of the fixed rotating block 19 is fitted onto the inner wall of the fitting block 15. Then, aligning the threaded holes of the upper flange pipe 17 and the lower flange pipe 12, the upper flange pipe 17 is placed on top of the lower flange pipe 12, and the upper flange pipe 17 and the lower flange pipe 12 are connected by nuts. At this time, the handle of the fixed rotating block 19 is pressed down to the turning groove 16 of the lower flange pipe 12, and the handle is rotated to the side wall of the turning groove 16. When the fixed rotating block 19 is pressed down, The wave spring assembly 14 is compressed by the pressure applied by the fitting block 15. When the handle of the fixed rotating block 19 is stuck in the side wall of the turning groove 16, the wave spring assembly 14 generates an upward force to the fixed rotating block 19, so that the handle of the fixed rotating block 19 can be fixed in the turning groove 16 of the lower flange pipe 12, thereby making the lower flange pipe 12 and the upper flange pipe 17 tightly fixed, thereby reducing the phenomenon of flange loosening caused by the pressure generated during water intake and reducing water leakage.

[0029] Furthermore, such as Figure 4 , Figure 5 , Figure 6As shown, a guide plate 2 is rotatably connected to the middle of the upper flange pipe 17; multiple sets of guide rail holes 21 are opened in the middle of the guide plate 2; a guide rail plate 22 is fixedly connected to the middle of the upper flange pipe 17; multiple sets of expansion holes 23 are opened in the middle of the guide rail plate 22; a linkage rod 24 is slidably connected in the guide rail hole 21; a linkage rod 24 is slidably connected in the expansion hole 23; a closing block 25 is fixedly connected to the end of the linkage rod 24; and a water guide pipe 26 is detachably connected to the end of the upper flange pipe 17. During operation, the rotating guide plate 2, guided by the guide rail hole 21, causes the linkage rod 24 to slide back and forth at the expansion hole 23. When connecting the water pipe 26 to the inlet end of the upper flange pipe 17, rotating the guide plate 2 causes the linkage rod 24 to slide into the expansion hole 23, simultaneously driving the closing block 25 to squeeze the water pipe 26 fitted onto the inlet end of the upper flange pipe 17, reducing the gap between the water pipe 26 and the upper flange pipe 17, thereby reducing the amount of water flowing from the connection between the upper flange pipe 17 and the water pipe 26 during water intake. To prevent leakage at the joint, this step involves rotating the guide plate 2 and the guide rail hole 21 to allow the linkage rod 24 to slide back and forth at the expansion hole 23, while simultaneously driving the closing block 25 to slide. When the water pipe 26 is connected to the inlet end of the flange pipe 17 on the table, the squeezing action of the four sets of closing blocks 25 on the water pipe 26 by the convex sealing gaskets reduces the gap generated between the water pipe 26 and the upper flange pipe 17, thereby reducing the phenomenon of water leakage from the connection between the upper flange pipe 17 and the water pipe 26 when water enters.

[0030] Furthermore, such as Figure 4 , Figure 5 As shown, a rubber sleeve 3 is slidably connected to the middle of the upper flange pipe 17; multiple sets of positioning blocks 31 are fixedly connected to the ends of the rubber sleeve 3; a spring strip 32 is fixedly connected to the middle of the positioning block 31; a pressure-bearing hollow column 33 is fixedly connected to the end of the spring strip 32; and the pressure-bearing hollow column 33 is fixedly connected to the middle of the guide rail plate 22. During operation, when the water guide pipe 26 is fitted and connected to the inlet end of the upper flange pipe 17, the water guide pipe 26 is fitted deeper into the upper flange pipe 17. This reduces water leakage from the port of the water guide pipe 26. At the same time, during the process of fitting the water guide pipe 26 deeper into the upper flange pipe 17, the rubber sleeve 3 can fill the gap between the port of the water guide pipe 26 and the upper flange pipe 17. When water is introduced, the spring strip 32 can buffer the pressure generated during water introduction. The reaction force of the spring strip 32 can drive the rubber sleeve 3 to fit more tightly at the port of the water guide pipe 26. This step, through the rubber sleeve 3, fills the gap when the water guide pipe 26 and the upper flange pipe 17 are fitted and connected. During water introduction, the spring strip 32 can buffer the pressure generated during water introduction, improving the stability of the connection between the water guide pipe 26 and the upper flange pipe 17.

[0031] Furthermore, as shown in Figure 2 Figure 3As shown, a convex sealing gasket 4 is fixedly connected to the end of the inlet pipe 11; a concave sealing gasket 41 is fixedly connected to the end of the lower flange pipe 12. During operation, when the lower flange pipe 12 is connected to the inlet pipe 11, the convex and concave sealing gaskets 4 and 41 fit tightly together, reducing the gap between the lower flange pipe 12 and the inlet pipe 11 and increasing the tightness between them. This step, through the tight connection of the convex and concave sealing gaskets 4 and 41, reduces the gap between the lower flange pipe 12 and the inlet pipe 11, thus reducing the leakage of water splashed inside during water intake through the connection between the inlet pipe 11 and the lower flange pipe 12.

[0032] Furthermore, such as Figure 3 , Figure 5 As shown, the upper flange pipe 17 has a first rubber ring 5 fixedly spaced at its end; the lower flange pipe 12 has a filling groove 51 at its end; and a second rubber ring 52 is provided inside the filling groove 51. During operation, when the upper flange pipe 17 and the lower flange pipe 12 are connected, the first rubber ring 5 can press down on the second rubber ring 52, causing the second rubber ring 52 filled in the filling groove 51 to expand outwards, reducing the gap when the upper flange pipe 17 and the lower flange pipe 12 are connected. This step, during the connection of the upper flange pipe 17 and the lower flange pipe 12, uses the filling groove 51 to press down on the second rubber ring 52, causing the filling groove 51 filled inside to expand outwards, reducing the gap when the upper flange pipe 17 and the lower flange pipe 12 are connected, and reducing the phenomenon of water seeping out from the connection point of the upper flange pipe 17 and the lower flange pipe 12 when water enters.

[0033] Furthermore, such as Figure 5 As shown, a damping column 6 is fixedly connected to the end of the spring strip 32. During operation, when water enters through the water pipe 26 and is then closed, the positioning block 31 will compress and rebound. The damping column 6 can buffer the compression and rebound forces of the positioning block 31. This step improves the stability of the positioning block 31 during compression and rebound by buffering the compression and rebound forces of the positioning block 31 through the damping column 6.

[0034] Furthermore, such as Figure 5 As shown, a limiting post 7 is fixedly connected to the end of the guide plate 2. During operation, the limiting post 7 can limit the guide plate 2, ensuring that the guide plate 2 is at a certain height. This step, by limiting the guide plate 2 with the limiting post 7, reduces the phenomenon of large displacement of the guide plate 2 caused by the impact force generated by the incoming water.

[0035] Working principle: During operation, first connect the lower flange pipe 12 and the inlet pipe 11 with threads to ensure a tight fit between them. Then, move the upper flange pipe 17 so that the lower end of the fixed rotating block 19 fits onto the inner wall of the fitting block 15. Next, align the threaded holes of the upper flange pipe 17 and the lower flange pipe 12, place the upper flange pipe 17 on top of the lower flange pipe 12, and connect them with nuts. At this time, the fixed rotating block 19 applies downward force to the wave spring assembly 14 through the fitting block 15, compressing the wave spring assembly 14. Then, press down on the handle of the fixed rotating block 19 and rotate the handle to rotate it to the lower position. At the side wall of the turning groove 16 on the flange pipe 12, the lower flange pipe 12 and the upper flange pipe 17 can be fixedly closed. This step involves connecting the lower flange pipe 12 to the inlet pipe 11, moving the upper flange pipe 17 so that the end of the fixing rotating block 19 fits onto the inner side wall of the fitting block 15, then aligning the threaded holes of the upper flange pipe 17 and the lower flange pipe 12, placing the upper flange pipe 17 on top of the lower flange pipe 12, and connecting the upper flange pipe 17 and the lower flange pipe 12 with nuts. At this point, press down the handle of the fixing rotating block 19 to the turning groove 16 on the lower flange pipe 12 and rotate the handle to the side wall of the turning groove 16. While pressing down the fixing rotating block 19, the fitting block... 15. Pressure is applied to the wave spring assembly 14, causing it to compress. When the handle of the fixed rotating block 19 is engaged with the side wall of the turning groove 16, the wave spring assembly 14 generates an upward force on the fixed rotating block 19, securing the handle of the fixed rotating block 19 to the turning groove 16 of the lower flange pipe 12. This ensures a tight fixation between the lower flange pipe 12 and the upper flange pipe 17, reducing the pressure generated during water inlet and minimizing water leakage. During operation, the rotating guide plate 2, guided by the guide rail hole 21, causes the linkage rod 24 to slide back and forth at the expansion hole 23. When the water pipe 26 is connected to the inlet end of the upper flange pipe 17, the rotating guide plate 2 causes the linkage rod 24 to slide into the expansion hole 23, simultaneously driving... The closing block 25 compresses the water guide pipe 26 fitted onto the inlet end of the upper flange pipe 17, reducing the gap between the water guide pipe 26 and the upper flange pipe 17. This reduces water leakage from the connection between the upper flange pipe 17 and the water guide pipe 26 during water intake. This step is achieved by rotating the guide plate 2 and the guide rail hole 21, allowing the linkage rod 24 to slide back and forth at the expansion hole 23, simultaneously driving the closing block 25 to slide. When the water guide pipe 26 connects to the inlet end of the upper flange pipe 17, the compression action of the four sets of closing blocks 25 on the water guide pipe 26 by the convex sealing gasket reduces the gap between the water guide pipe 26 and the upper flange pipe 17, thereby reducing water leakage from the connection between the upper flange pipe 17 and the water guide pipe 26 during water intake.During operation, when connecting the water guide pipe 26 to the inlet end of the upper flange pipe 17, the water guide pipe 26 is pushed deeper into the upper flange pipe 17. This reduces water leakage from the end of the water guide pipe 26. Simultaneously, as the water guide pipe 26 is pushed deeper into the upper flange pipe 17, the rubber sleeve 3 fills the gap between the end of the water guide pipe 26 and the upper flange pipe 17. During water intake, the spring strip 32 buffers the pressure generated, and the reaction force of the spring strip 32 causes the rubber sleeve 3 to fit more tightly against the end of the water guide pipe 26. This step, through the rubber sleeve 3, fills the gap between the water guide pipe 26 and the upper flange pipe 17. The gap during connection is mitigated by the spring strip 32, which buffers the pressure generated during water intake and improves the stability of the connection between the water guide pipe 26 and the upper flange pipe 17. During operation, when connecting the lower flange pipe 12 to the inlet pipe 11, the convex and concave sealing gaskets 4 and 41 fit tightly together, reducing the gap between them and improving their tightness. This step, through the tight connection of the convex and concave sealing gaskets 4 and 41, reduces the gap between the lower flange pipe 12 and the inlet pipe 11, minimizing internal splashing during water intake. The phenomenon of water seeping out through the connection between the inlet pipe 11 and the lower flange pipe 12 is addressed during operation. When connecting the upper flange pipe 17 and the lower flange pipe 12, the first rubber ring 5 can press the second rubber ring 52 downwards, causing the second rubber ring 52 filled in the filling groove 51 to expand outwards, reducing the gap when connecting the upper flange pipe 17 and the lower flange pipe 12. In this step, when connecting the upper flange pipe 17 and the lower flange pipe 12, the filling groove 51 presses the second rubber ring 52, causing the filling groove 51 filled inside the filling groove 51 to expand outwards, reducing the gap when connecting the upper flange pipe 17 and the lower flange pipe 12. The gap reduces the leakage of water from the connection between the upper flange pipe 17 and the lower flange pipe 12 during water intake. During operation, as water enters through the guide pipe 26 and is then shut off, the positioning block 31 compresses and rebounds. The damping column 6 buffers the compression and rebound forces of the positioning block 31, improving its stability. During operation, the limiting column 7 limits the guide plate 2, ensuring it remains at a certain height. This limiting column 7 reduces the possibility of significant displacement of the guide plate 2 due to the impact of incoming water.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A heat exchanger inlet sealing connection structure, comprising a heat exchanger plate (1); characterized in that: The heat exchanger plate (1) is fixedly connected to an inlet pipe (11) at one end; a lower flange pipe (12) is threadedly connected to the middle of the inlet pipe (11); a lower fixing sleeve (13) is fixedly connected to the end of the lower flange pipe (12); a wave spring assembly (14) is fixedly connected to both sides of the end of the lower fixing sleeve (13); a fitting block (15) is fixedly connected to the end of the wave spring assembly (14); a turning groove (16) is opened on both sides of the end of the lower fixing sleeve (13); an upper flange pipe (17) is provided on the top of the lower fixing sleeve (13); an upper fixing sleeve (18) is fixedly connected to the end of the upper flange pipe (17); and a fixed rotating block (19) is rotatably connected to both sides of the end of the upper fixing sleeve (18).

2. The heat exchanger inlet sealing connection structure as described in claim 1, characterized in that: A guide plate (2) is rotatably connected to the middle of the upper flange pipe (17); multiple sets of guide rail holes (21) are opened in the middle of the guide plate (2); a guide rail plate (22) is fixedly connected to the middle of the upper flange pipe (17); multiple sets of expansion holes (23) are opened in the middle of the guide rail plate (22); a linkage rod (24) is slidably connected in the guide rail hole (21); a linkage rod (24) is slidably connected in the expansion hole (23); a closing block (25) is fixedly connected to the end of the linkage rod (24); and a water pipe (26) is detachably connected to the end of the upper flange pipe (17).

3. The heat exchanger inlet sealing connection structure as described in claim 1, characterized in that: A rubber sleeve (3) is slidably connected in the middle of the upper flange pipe (17); multiple sets of positioning blocks (31) are fixedly connected to the end of the rubber sleeve (3); a spring strip (32) is fixedly connected in the middle of the positioning block (31); a pressure-bearing hollow column (33) is fixedly connected to the end of the spring strip (32); and the pressure-bearing hollow column (33) is fixedly connected in the middle of the guide rail plate (22).

4. The heat exchanger inlet sealing connection structure as described in claim 1, characterized in that: A convex sealing gasket (4) is fixedly connected to the end of the inlet pipe (11); a concave sealing gasket (41) is fixedly connected to the end of the lower flange pipe (12).

5. The heat exchanger inlet sealing connection structure as described in claim 1, characterized in that: The upper flange pipe (17) has a first rubber ring (5) at a fixed distance at its end; the lower flange pipe (12) has a filling groove (51) at its end; and a second rubber ring (52) is provided inside the filling groove (51).

6. The heat exchanger inlet sealing connection structure as described in claim 3, characterized in that: A damping column (6) is fixedly connected to the end of the spring bar (32).

7. The heat exchanger inlet sealing connection structure as described in claim 2, characterized in that: The guide plate (2) is fixedly connected to a limit post (7) at its end.

Images