Flue gas purification device for sintering machine

Abstract

The invention relates to the technical field of sintering machine flue gas purification, and discloses a sintering machine flue gas purification device which comprises a desulfurizing tower body, a mounting frame is fixedly connected to the inner side of the desulfurizing tower body, a hollow rotating column is rotatably connected to the top end of the mounting frame, and a rotating disc is fixedly connected to the top end of the hollow rotating column. And the outer side of the rotating disc is fixedly connected with a connecting rod, the top ends of the connecting rod and the rotating disc are fixedly connected with air outlet pipes, the top ends of the connecting rod and the rotating disc are fixedly connected with blocking assemblies, and the bottom end of the mounting frame is fixedly connected with a smoke inlet pipe. According to the flue gas purification device for the sintering machine, flue gas can be layered through centrifugal force, the rising and diffusion speed of waste gas with the heavy molecular mass such as sulfur dioxide and nitride can be decreased, then the purification time of the waste gas with the heavy molecular mass such as sulfur dioxide and nitride can be prolonged, and the purification effect is improved; and the flue gas of the sintering machine can be uniformly filtered.

Description

Technical Field

[0001] The invention relates to the technical field of sintering machine fume purification, in particular to a sintering machine fume purification device. Background Art

[0002] Sintering machine flue gas refers to the flue gas generated by the sintering machine during the sintering process in the steel production process. During the steel smelting process, the sintering machine uses exhaust sintering to sinter clean ore powder and rich ore powder of different compositions and particle sizes into blocks. This process will produce a large amount of flue gas. These fumes are not only large in volume, but also contain a variety of pollutants, which have a great impact on the environment and human health. Purification equipment is needed to purify the flue gas.

[0003] In the process of purifying the existing sintering machine flue gas, a desulfurization tower is used to purify the sintering machine flue gas. During the use of the desulfurization tower, the flue gas is usually concentrated at the position of the flue gas inlet pipe, and then enters the inner side of the desulfurization tower through natural diffusion. The flue gas concentration near the flue gas inlet pipe is higher, and the flue gas molecule content is more diverse. Then, after diffusing to the inside of the desulfurization tower, the flue gas concentration will decrease, resulting in different flue gas concentrations inside the desulfurization tower, and the spray liquid is evenly sprayed on the inside of the spray tower, resulting in different flue gas treatment effects inside the spray tower. At the same time, the content of substances in the flue gas is different, and there are many types of these flue gas particles. Different types of substances require different spraying times, and the existing spray tower does not perform a certain stratification operation on the flue gas, so that each substance has the same contact time with the spray liquid, thereby reducing the purification effect of the flue gas inside the desulfurization tower. Therefore, a flue gas purification device for a sintering machine is proposed to solve the above-mentioned problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a fume purification device for a sintering machine, which has the advantages of being able to perform stratified operation on the fume through centrifugal force, reducing the rising and diffusion speed of waste gases with heavier molecular weights such as sulfur dioxide and nitrides, thereby increasing the purification time of waste gases with heavier molecular weights such as sulfur dioxide and nitrides, improving the purification effect, and being able to evenly filter the fume from the sintering machine, etc., solving the problem that the existing fume purification process of the sintering machine uses a desulfurization tower to purify the fume from the sintering machine, and during the use of the desulfurization tower, the fume is usually concentrated at the position of the fume inlet pipe, and then is naturally diffused into the fume purifier. Enters the inner side of the desulfurization tower, and the flue gas concentration near the flue gas inlet pipe is higher, and the flue gas molecules contain more types. Then, after diffusing to the inside of the desulfurization tower, the flue gas concentration will decrease, making the flue gas concentration inside the desulfurization tower different, and the spray liquid is evenly sprayed on the inside of the spray tower, resulting in different flue gas treatment effects inside the spray tower. At the same time, the content of substances in the flue gas is different, and there are many types of these flue gas particles. Different types of substances require different spraying times, and the existing spray tower does not perform a certain stratification operation on the flue gas, so that each substance has the same contact time with the spray liquid, thereby reducing the purification effect of the flue gas inside the desulfurization tower.

[0006] (II) Technical solution

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a flue gas purification device for a sintering machine comprises a desulfurization tower body, the inner side of the desulfurization tower body is fixedly connected with a mounting frame, the top of the mounting frame is rotatably connected with a hollow rotating column, the top of the hollow rotating column is fixedly connected with a rotating disk, the outer side of the rotating disk is fixedly connected with a connecting rod, the tops of the connecting rod and the rotating disk are both fixedly connected with an exhaust pipe, the tops of the connecting rod and the rotating disk are both fixedly connected with a blocking component, the bottom end of the mounting frame is fixedly connected with a smoke inlet pipe, the outer side of the hollow rotating column is fixedly connected with a power rotating component, the inner bottom wall of the desulfurization tower body is provided with a mud-water mixture, the outer side of the desulfurization tower body is fixedly connected with a water guide component, the inner side of the desulfurization tower body is fixedly connected with a spraying component, and the top of the desulfurization tower body is fixedly connected with a smoke outlet pipe.

[0008] The beneficial effects of the present invention are:

[0009] The flue gas purification device for sintering machines has the advantages of being able to stratify the flue gas through centrifugal force. The rising and diffusion speed of waste gases with heavier molecular weights such as sulfur dioxide and nitrides will be reduced, thereby increasing the purification time of waste gases with heavier molecular weights such as sulfur dioxide and nitrides, improving the purification effect, and evenly filtering the flue gas from the sintering machine.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, there are multiple air outlet pipes, which are evenly distributed on the outside of the connecting rod and the rotating disk, and there are multiple blocking components, which are located on the outside of the air outlet pipes.

[0012] The beneficial effect of adopting the above further solution is that the number of exhaust pipes is multiple, which can improve the exhaust effect of smoke.

[0013] Furthermore, the blocking assembly includes a blocking rod fixedly connected to the top of the connecting rod or the rotating disk, the top of the blocking rod is fixedly connected with an arc-shaped blocking plate, the arc-shaped blocking plate is located directly above the air outlet pipe, and the number of blocking rods at the bottom end of a single arc-shaped blocking plate is four.

[0014] The beneficial effect of adopting the above further solution is that the blocking component can perform a blocking operation on smoke.

[0015] Furthermore, the power rotating assembly includes a power worm gear fixedly connected to the outside of the hollow rotating column, a power motor is fixedly connected to the outside of the desulfurization tower body, a power worm is fixedly connected to the outside of the output shaft of the power motor, and the power worm is meshed with the outside of the power worm gear.

[0016] The beneficial effect of adopting the above further solution is that the power rotating assembly can cause the hollow rotating column to rotate.

[0017] Furthermore, a protective shell is fixedly connected to the top of the hollow rotating column, the power worm gear is located on the inner side of the protective shell, a hollow protective rod is fixedly connected to the inner side of the desulfurization tower body, the power worm gear is located on the inner side of the hollow protective rod, and there are multiple spray assemblies, which are evenly distributed on the inner side of the desulfurization tower body.

[0018] The beneficial effect of adopting the above further solution is that the protective shell can protect the outer side of the power worm gear.

[0019] Furthermore, the water guiding assembly includes a water guiding pump fixedly connected to the outside of the desulfurization tower body, the outside of the water guiding pump is fixedly connected with a water inlet pipe, the outside of the water guiding pump is fixedly connected with a first water outlet pipe, the outside of the first water outlet pipe is fixedly connected with a second water outlet pipe, and the outside of the second water outlet pipe is connected to the outside of the spray assembly.

[0020] The beneficial effect of adopting the above further solution is that the water guiding component can perform water guiding operation on the mud-water mixture.

[0021] Furthermore, the spray assembly comprises a spray rack fixedly connected to the inner side of the desulfurization tower body, a spray rod fixedly connected to the outer side of the spray rack, and spray nozzles fixedly connected to the bottom ends of the spray rack and the spray rod.

[0022] The beneficial effect of adopting the above further solution is that the spraying assembly can perform a spraying operation on the mud-water mixture.

[0023] Furthermore, a stirring assembly is fixedly connected to the inner side of the desulfurization tower body, a filter shell is fixedly connected to the inner side of the desulfurization tower body, a filter element is fixedly connected to the inner side of the filter shell, a corrugated baffle plate is fixedly connected to the inner side of the desulfurization tower body, and the number of the corrugated baffle plates is multiple.

[0024] Furthermore, the stirring assembly includes a limit rod fixedly connected to the inner side of the desulfurization tower body, the outer side of the limit rod is sleeved with a limit sleeve, the bottom end of the limit sleeve is rotatably connected to a stirring rod, the outer side of the stirring rod is fixedly connected to an auxiliary rod, the top of the limit sleeve is fixedly connected to a pushing block, the front end of the desulfurization tower body is fixedly connected to a telescopic cylinder, and the outer side of the telescopic cylinder is fixedly connected to the outer side of the pushing block.

[0025] The beneficial effect of adopting the above further solution is that the stirring assembly can perform stirring operation on the mud-water mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0028] Figure 3 It is an enlarged view of point A in the structural diagram of the present invention;

[0029] Figure 4 This is a connection diagram of the rotating disk and the connecting rod of the present invention;

[0030] Figure 5 This is a connection diagram of the spray rack and the spray rod of the present invention;

[0031] Figure 6 It is a partial cross-sectional view of the structure of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the corrugated baffle plate of the present invention.

[0033] In the figure: 1. desulfurization tower body; 2. mounting frame; 3. hollow rotating column; 4. rotating disk; 5. connecting rod; 6. exhaust pipe; 7. blocking assembly; 71. blocking rod; 72. arc blocking plate; 8. flue gas inlet pipe; 9. power rotating assembly; 91. power worm gear; 92. power motor; 93. power worm; 10. mud water mixture; 11. flue gas outlet pipe; 12. water guide assembly; 121. water guide pump; 1 22. Water inlet pipe; 123. First water outlet pipe; 124. Second water outlet pipe; 13. Spraying assembly; 131. Spraying rack; 132. Spraying rod; 133. Spraying nozzle; 14. Stirring assembly; 141. Limiting rod; 142. Limiting sleeve; 143. Stirring rod; 144. Auxiliary rod; 145. Push block; 146. Telescopic cylinder; 15. Filter housing; 16. Filter element; 17. Wave-shaped blocking plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1, by Figure 1-4 Provided is a flue gas purification device for a sintering machine, the present invention comprises a desulfurization tower body 1, a mounting frame 2 is fixedly connected to the inner side of the desulfurization tower body 1, a hollow rotating column 3 is rotatably connected to the top of the mounting frame 2, a rotating disk 4 is fixedly connected to the top of the hollow rotating column 3, a connecting rod 5 is fixedly connected to the outer side of the rotating disk 4, an air outlet pipe 6 is fixedly connected to the top of the connecting rod 5 and the rotating disk 4, a blocking component 7 is fixedly connected to the top of the connecting rod 5 and the rotating disk 4, a smoke inlet pipe 8 is fixedly connected to the bottom end of the mounting frame 2, a power rotating component 9 is fixedly connected to the outer side of the hollow rotating column 3, a mud-water mixture 10 is arranged on the inner bottom wall of the desulfurization tower body 1, a water guide component 12 is fixedly connected to the outer side of the desulfurization tower body 1, a spraying component 13 is fixedly connected to the inner side of the desulfurization tower body 1, and a smoke outlet pipe 11 is fixedly connected to the top of the desulfurization tower body 1.

[0036] The main components of sintering machine flue gas include nitrogen, oxygen, carbon dioxide, sulfur dioxide, nitrogen oxides and smoke.

[0037] Before the sintering machine flue gas enters the inner side of the desulfurization tower body 1, it will first enter the bag filter, and a large amount of smoke and other solid particles in the sintering machine flue gas will be cleaned up.

[0038] The flue gas generated during the use of the sintering machine will be introduced into the inner side of the desulfurization tower body 1 through the flue gas inlet pipe 8.

[0039] There are multiple air outlet pipes 6 , which are evenly distributed on the outside of the connecting rod 5 and the rotating disk 4 ; there are multiple blocking components 7 , which are located on the outside of the air outlet pipes 6 .

[0040] The plurality of outlet pipes 6 can improve the exhaust effect of the flue gas, and can make the flue gas evenly diffuse inside the desulfurization tower body 1, thereby improving the purification effect of the flue gas.

[0041] Among them, the blocking assembly 7 includes a blocking rod 71 fixedly connected to the connecting rod 5 or the top of the rotating disk 4, and the top of the blocking rod 71 is fixedly connected with an arc-shaped blocking plate 72, which is located directly above the air outlet pipe 6, and the number of blocking rods 71 ​​at the bottom end of a single arc-shaped blocking plate 72 is four.

[0042] The blocking component 7 can block the flue gas and some solid particles in the flue gas, thereby improving the purification effect of the flue gas. At the same time, several small holes can be opened at the bottom end of the connecting rod 5 to facilitate the falling of solid particles and improve the diffusion effect.

[0043] Among them, the power rotating component 9 includes a power worm gear 91 fixedly connected to the outside of the hollow rotating column 3, a power motor 92 is fixedly connected to the outside of the desulfurization tower body 1, a power worm 93 is fixedly connected to the outside of the output shaft of the power motor 92, and the power worm 93 is meshed with the outside of the power worm gear 91.

[0044] The power rotating assembly 9 can rotate the rotating disk 4, and the flue gas can be layered by centrifugal force during the rotation, so that different types of flue gas can be discharged with different efficiency, thereby improving the overall purification effect of the flue gas.

[0045] Starting the power motor 92 can cause the power worm 93 to rotate, and then the hollow rotating column 3 can be rotated through the power worm gear 91, thereby improving the smoke diffusion effect.

[0046] According to Graham's law, the diffusion rate of a gas is inversely proportional to the square root of its relative molecular mass. The relative molecular mass of nitrogen in the sintering machine flue gas is 28, oxygen is 32, carbon dioxide is 44, sulfur dioxide is 64, and nitrogen oxides (such as nitrogen dioxide with a relative molecular mass of 46) have different relative molecular masses. During the rotation of the hollow rotating column 3, the flue gas in the sintering machine flue gas will generate a certain centrifugal force. During the centrifugal process, gases with a small relative molecular mass tend to move faster to the exhaust pipe 6 under the action of centrifugal force, thereby improving the purification effect of the sintering machine flue gas.

[0047] Among them, the top of the hollow rotating column 3 is fixedly connected to a protective shell, the power worm gear 91 is located on the inner side of the protective shell, the inner side of the desulfurization tower body 1 is fixedly connected to a hollow protective rod, the power worm gear 93 is located on the inner side of the hollow protective rod, and there are multiple spray assemblies 13, which are evenly distributed on the inner side of the desulfurization tower body 1.

[0048] The protective shell can protect the outer side of the power worm gear 91, and the hollow protective rod can protect the outer side of the power worm 93, thereby effectively preventing the outer sides of the power worm gear 91 and the power worm 93 from being damaged, thereby improving the use effect of the power worm 93 and the power worm gear 91.

[0049] Working principle:

[0050] The flue gas generated during the use of the sintering machine will be introduced into the inner side of the hollow rotating column 3 through the flue gas inlet pipe 8, and then the flue gas will enter the inner side of the rotating disk 4 and the connecting rod 5, and then the flue gas will diffuse to the inner side of the desulfurization tower body 1 through the exhaust pipe 6. At the same time, starting the power motor 92 can make the power worm 93 rotate, and then the hollow rotating column 3 can be rotated through the power worm gear 91, thereby improving the smoke diffusion effect, and the smoke can be blocked by the arc-shaped blocking plate 72, thereby improving the smoke effect.

[0051] Embodiment 2, by Figure 5-7 It is given that the water guiding assembly 12 includes a water guiding pump 121 fixedly connected to the outside of the desulfurization tower body 1, the outside of the water guiding pump 121 is fixedly connected with a water inlet pipe 122, the outside of the water guiding pump 121 is fixedly connected with a first water outlet pipe 123, the outside of the first water outlet pipe 123 is fixedly connected with a second water outlet pipe 124, and the outside of the second water outlet pipe 124 is connected to the outside of the spraying assembly 13.

[0052] The water pump 121 is started to guide the mud-water mixture 10 into the inner side of the first water outlet pipe 123 through the water inlet pipe 122 , and then into the inner side of the spraying frame 131 through the second water outlet pipe 124 .

[0053] The spray assembly 13 includes a spray rack 131 fixedly connected to the inner side of the desulfurization tower body 1, a spray rod 132 fixedly connected to the outer side of the spray rack 131, and a spray nozzle 133 fixedly connected to the bottom ends of the spray rack 131 and the spray rod 132.

[0054] The spraying assembly 13 can perform a spraying operation on the mud-water mixture 10 .

[0055] Among them, a stirring assembly 14 is fixedly connected to the inner side of the desulfurization tower body 1, a filter shell 15 is fixedly connected to the inner side of the desulfurization tower body 1, a filter element 16 is fixedly connected to the inner side of the filter shell 15, and a wavy baffle plate 17 is fixedly connected to the inner side of the desulfurization tower body 1, and the number of the wavy baffle plates 17 is multiple.

[0056] Among them, the stirring assembly 14 includes a limiting rod 141 fixedly connected to the inner side of the desulfurization tower body 1, the outer side of the limiting rod 141 is sleeved with a limiting sleeve 142, the bottom end of the limiting sleeve 142 is rotatably connected to a stirring rod 143, the outer side of the stirring rod 143 is fixedly connected to an auxiliary rod 144, the top of the limiting sleeve 142 is fixedly connected to a pushing block 145, the front end of the desulfurization tower body 1 is fixedly connected to a telescopic cylinder 146, and the outer side of the telescopic cylinder 146 is fixedly connected to the outer side of the pushing block 145.

[0057] Starting the telescopic cylinder 146 can move the push block 145 forward and backward, drive the limit sleeve 142 to move forward and backward, and then move the stirring rod 143 forward and backward, so that the mud-water mixture 10 can be mixed and stirred.

[0058] Working principle:

[0059] When the sintering machine flue gas enters the inner side of the desulfurization tower body 1, the water pump 121 is started to introduce the mud-water mixture 10 into the inner side of the first water outlet pipe 123 through the water inlet pipe 122, and then introduced into the inner side of the spray rack 131 through the second water outlet pipe 124. The mud-water mixture 10 can be sprayed out through the spray nozzle 133 through the spray rack 131, and then can come into contact with the flue gas to filter the flue gas, thereby improving the flue gas purification effect. The purified flue gas will be discharged through the flue gas outlet pipe 11.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas purification device for a sintering machine, comprising a desulfurization tower body (1), characterized in that: The inner side of the desulfurization tower body (1) is fixedly connected to a mounting frame (2), the top of the mounting frame (2) is rotatably connected to a hollow rotating column (3), the top of the hollow rotating column (3) is fixedly connected to a rotating disk (4), the outer side of the rotating disk (4) is fixedly connected to a connecting rod (5), the tops of the connecting rod (5) and the rotating disk (4) are both fixedly connected to an air outlet pipe (6), and the tops of the connecting rod (5) and the rotating disk (4) are both fixedly connected to a blocking component (7). The bottom end of the mounting frame (2) is fixedly connected to a flue gas inlet pipe (8), the outer side of the hollow rotating column (3) is fixedly connected to a power rotating assembly (9), the inner bottom wall of the desulfurization tower body (1) is provided with a mud-water mixture (10), the outer side of the desulfurization tower body (1) is fixedly connected to a water guide assembly (12), the inner side of the desulfurization tower body (1) is fixedly connected to a spray assembly (13), and the top of the desulfurization tower body (1) is fixedly connected to a flue gas outlet pipe (11).

2. The fume purification device for a sintering machine according to claim 1, characterized in that: There are a plurality of the air outlet pipes (6), and the plurality of the air outlet pipes (6) are evenly distributed on the outside of the connecting rod (5) and the rotating disk (4); there are a plurality of the blocking components (7), and the blocking components (7) are located on the outside of the air outlet pipes (6).

3. The fume purification device for a sintering machine according to claim 1, characterized in that: The blocking assembly (7) comprises a blocking rod (71) fixedly connected to the top of the connecting rod (5) or the rotating disk (4); the top of the blocking rod (71) is fixedly connected to an arc-shaped blocking plate (72); the arc-shaped blocking plate (72) is located directly above the air outlet pipe (6); and the number of blocking rods (71) at the bottom end of a single arc-shaped blocking plate (72) is four.

4. The fume purification device for a sintering machine according to claim 1, characterized in that: The power rotating assembly (9) comprises a power worm gear (91) fixedly connected to the outside of the hollow rotating column (3); a power motor (92) is fixedly connected to the outside of the desulfurization tower body (1); a power worm (93) is fixedly connected to the outside of the output shaft of the power motor (92); and the power worm gear (93) is meshed with the outside of the power worm gear (91).

5. The fume purification device for a sintering machine according to claim 4, characterized in that: The top of the hollow rotating column (3) is fixedly connected to a protective shell, the power worm gear (91) is located on the inner side of the protective shell, the inner side of the desulfurization tower body (1) is fixedly connected to a hollow protective rod, the power worm gear (93) is located on the inner side of the hollow protective rod, and there are multiple spray assemblies (13), which are evenly distributed on the inner side of the desulfurization tower body (1).

6. The fume purification device for a sintering machine according to claim 1, characterized in that: The water guide assembly (12) comprises a water guide pump (121) fixedly connected to the outside of the desulfurization tower body (1); a water inlet pipe (122) is fixedly connected to the outside of the water guide pump (121); a first water outlet pipe (123) is fixedly connected to the outside of the water guide pump (121); a second water outlet pipe (124) is fixedly connected to the outside of the first water outlet pipe (123); and the outside of the second water outlet pipe (124) is connected to the outside of the spray assembly (13).

7. The fume purification device for a sintering machine according to claim 1, characterized in that: The spray assembly (13) comprises a spray frame (131) fixedly connected to the inner side of the desulfurization tower body (1), a spray rod (132) fixedly connected to the outer side of the spray frame (131), and a spray nozzle (133) fixedly connected to the bottom ends of the spray frame (131) and the spray rod (132).

8. The fume purification device for a sintering machine according to claim 1, characterized in that: The inner side of the desulfurization tower body (1) is fixedly connected with a stirring assembly (14), the inner side of the desulfurization tower body (1) is fixedly connected with a filter shell (15), the inner side of the filter shell (15) is fixedly connected with a filter element (16), the inner side of the desulfurization tower body (1) is fixedly connected with a corrugated baffle plate (17), and the number of the corrugated baffle plates (17) is plural.

9. The fume purification device for a sintering machine according to claim 8, characterized in that: The stirring assembly (14) comprises a limit rod (141) fixedly connected to the inner side of the desulfurization tower body (1); the outer side of the limit rod (141) is sleeved with a limit sleeve (142); the bottom end of the limit sleeve (142) is rotatably connected to a stirring rod (143); the outer side of the stirring rod (143) is fixedly connected to an auxiliary rod (144); the top end of the limit sleeve (142) is fixedly connected to a pushing block (145); the front end of the desulfurization tower body (1) is fixedly connected to a telescopic cylinder (146); the outer side of the telescopic cylinder (146) is fixedly connected to the outer side of the pushing block (145).

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