Heavy metal capturing agent screening equipment for wastewater treatment

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses heavy metal capturing agent screening equipment for wastewater treatment, which comprises a screening equipment body. According to the heavy metal capturing agent screening equipment for wastewater treatment, a pull ring is moved towards the back side through a hand, then a storage plate is placed at the bottom of a top tank and the top of a bottom tank, then a first outer ring and a second outer ring are rotated towards the inner side through the hand, and a first rotating plate and a second rotating plate are driven to rotate through rotation of the first outer ring and the second outer ring; then a special-shaped plate is pressed forwards by holding with hands, then an outer ring I moves to drive an insertion block to be inserted into an inner cavity of an outer frame, and then the special-shaped plate is loosened after the special-shaped plate reaches a designated position, so that the effect of collecting generated flocculent precipitates is further achieved, and the problem that in the using process of existing heavy metal capture agent screening equipment, the working efficiency is high can be solved. And flocculent precipitates generated after the reaction of the heavy metal capturing agent and the wastewater cannot be collected and treated, so that the pollution to the interior of the tank body is easily caused.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a heavy metal capture agent screening device for wastewater treatment. Background Art

[0002] Wastewater treatment is the use of physical, chemical and biological methods to treat wastewater, purify the wastewater, reduce pollution, and even recycle and reuse wastewater to make full use of water resources.

[0003] At present, with the development of social life, water pollution has become increasingly serious, so wastewater treatment has become an extremely important issue today, and heavy metal capture agent screening equipment is often required in wastewater treatment. Heavy metal capture agents react rapidly with various metal ions in wastewater such as chromium, nickel, copper, zinc, mercury, manganese, cadmium, vanadium and tin at room temperature to generate water-insoluble polymer chelated salts and form flocculent precipitates, thereby achieving the purpose of removing heavy metal ions. However, during the use of existing heavy metal capture agent screening equipment, the flocculent precipitates generated after the reaction between the heavy metal capture agent and the wastewater cannot be collected and processed, and then it is very easy to cause pollution to the interior of the tank and affect the next screening process. Therefore, improvements are proposed for the heavy metal capture agent screening equipment, and technical personnel in this field provide a heavy metal capture agent screening equipment for wastewater treatment to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a heavy metal capture agent screening device for wastewater treatment to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A heavy metal capture agent screening device for wastewater treatment, comprising a screening device body, the screening device body comprising a top tank, the left side of the top of the top tank is connected to a drug inlet pipe, the right side of the top of the top tank is connected to a water inlet pipe, a bottom tank is installed at the bottom of the top tank, the bottom of the bottom tank is connected to a water outlet pipe, and filtering mechanisms are installed at the bottom of the top tank and the top of the bottom tank;

[0007] The filtering mechanism includes a storage plate, the top of the storage plate is movably connected to the bottom of the top tank, the bottom of the storage plate is movably connected to the top of the bottom tank, the bottom of the inner cavity of the storage plate is fixedly connected with a filter plate, the front side of the filter plate is fixedly connected with a connecting plate, the inner cavity of the connecting plate is fixedly connected with a rotating rod, the top and bottom of the rotating rod surface are both movably connected with rotating plate 2, the right side of the rotating plate 2 is fixedly connected with outer ring 2, the middle part of the rotating rod surface is movably connected with rotating plate 1, the left side of the rotating plate 1 is fixedly connected with outer ring 1, and the left side of the outer ring 2 and the right side of the outer ring 1 are both movably connected to the surfaces of the top tank and the bottom tank.

[0008] As a further solution of the utility model: the back side of the outer ring one is fixedly connected with an insert block, the back side of the outer ring two is fixedly connected with an outer frame, the left side of the inner cavity of the outer frame is fixedly connected with a rotating shaft, the inner cavity of the rotating shaft is movably connected with a special-shaped plate, the right side of the front side of the special-shaped plate is fixedly connected with a filter plate, and the front side of the filter plate is plugged into the inner cavity of the insert block.

[0009] As a further solution of the utility model: a positioning hole is opened in the inner cavity of the insert block, and the positioning hole is arranged in a circular structure. A second spring is fixedly connected to the right side of the back side of the outer frame, and the back side of the second spring is fixedly connected to the inner cavity of the outer frame.

[0010] As a further solution of the utility model: both sides of the front side of the outer ring one and the outer ring two are fixedly connected with connecting blocks, the front side of the connecting block is fixedly connected with a hand pull ring, the hand pull ring is arranged in an annular structure, the inner cavities of the outer ring one and the outer ring two are fixedly connected with sealing gaskets, and the inner sides of the sealing gaskets are movably connected to the surfaces of the top tank and the bottom tank.

[0011] As a further solution of the utility model: positioning blocks are fixedly connected on all four sides of the top tank, the front and back sides of the inner cavities of the outer ring one and outer ring two are movably connected with clamping blocks, the top of the clamping block surface is clamped and connected to the inner cavity of the positioning block, the bottom of the clamping block is fixedly connected with spring one, the bottom of the spring one is respectively fixedly connected to the inner cavities of the outer ring one and outer ring two, the outer side of the clamping block is fixedly connected with a hand pull plate, and the outer side of the hand pull plate passes through the outside of the outer ring one and outer ring two.

[0012] As a further solution of the utility model: a stirring mechanism is installed on the top of the top tank, and the stirring mechanism includes a servo motor. The bottom of the servo motor is fixedly connected to the bottom of the top tank, and the output end of the servo motor passes through the inner cavity of the top tank and is fixedly connected to a support rod. The surface of the support rod is fixedly connected to a stirring rod. There are multiple stirring rods, and a reinforcement plate is fixedly connected to the inner side of the surface of the stirring rod. The reinforcement plate is arranged in an arc-shaped structure.

[0013] As a further solution of the utility model: connecting rods are fixedly connected to both sides of the top tank, the bottom of the inner side of the connecting rods is fixedly connected to both sides of the bottom tank, the top of the top tank surface is fixedly connected to a fixing plate, the four corners of the bottom of the fixing plate are fixedly connected to pillars, and the bottom of the pillars is fixedly connected to the bottom plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The filter plate is then moved back and forth between the top and bottom of the filter housing, and the ...

[0016] 2. The utility model presses the special-shaped plate inward by hand, and then makes the special-shaped plate rotate around the rotating shaft, and then makes the spring two be compressed, and then the plug block is inserted into the inner cavity of the outer frame, and then the special-shaped plate is released after reaching the specified position, and then the special-shaped plate is restored to its original position under the action of the spring two, and then the insertion rod is inserted into the inner cavity of the positioning hole, so as to achieve the effect of fixing the outer ring one and the outer ring two in the working state, and through the setting of the positioning hole, the insertion rod can be smoothly inserted into the inner cavity of the plug block, and then the plug block can be installed and disassembled, and through the setting of the spring two, when the special-shaped plate moves, the spring two will be compressed, so as to absorb the generated force, and further, when the special-shaped plate loses its force, the spring two will restore its deformation, and then the effect of fixing and disassembling the plug block can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a heavy metal capture agent screening device for wastewater treatment;

[0018] Figure 2 A schematic diagram of the back structure connection of a top tank in a heavy metal capture agent screening device for wastewater treatment;

[0019] Figure 3A cross-sectional view of a top tank and a bottom tank in a heavy metal capture agent screening device for wastewater treatment;

[0020] Figure 4 This is a schematic diagram of the disassembly and connection of a transfer plate 1 and a transfer rod in a heavy metal capture agent screening device for wastewater treatment;

[0021] Figure 5 A cross-sectional view of the second outer ring in a heavy metal capture agent screening device for wastewater treatment;

[0022] Figure 6 A cross-sectional view of an outer frame of a heavy metal capture agent screening device for wastewater treatment;

[0023] Figure 7 The present invention is a schematic diagram of the disassembly and connection of positioning holes and insertion rods in a heavy metal capture agent screening device for wastewater treatment.

[0024] In the figure: 1. Screening equipment body; 101. Top tank; 102. Fixing plate; 103. Pillar; 104. Bottom plate; 105. Bottom tank; 106. Connecting rod; 107. Water inlet pipe; 108. Drug inlet pipe; 109. Positioning block; 110. Water outlet pipe; 2. Filter mechanism; 201. Storage plate; 202. Sealing pad; 203. Outer ring 1; 204. Hand pull ring; 205. Rotating plate 1; 206. Rotating rod; 207. Connecting rod Connecting plate; 208, rotating plate 2; 209, connecting block; 210, outer ring 2; 211, filter plate; 212, spring 1; 213, hand-pull plate; 214, clamping block; 215, outer frame; 216, spring 2; 217, rotating shaft; 218, special-shaped plate; 219, inserting block; 220, positioning hole; 221, inserting rod; 3, stirring mechanism; 301, servo motor; 302, supporting rod; 303, stirring rod; 304, reinforcing plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-7 A heavy metal capture agent screening device for wastewater treatment, comprising a screening device body 1, the screening device body 1 comprising a top tank 101, the left side of the top of the top tank 101 is connected with a drug inlet pipe 108, the right side of the top of the top tank 101 is connected with a water inlet pipe 107, a bottom tank 105 is installed at the bottom of the top tank 101, the bottom of the bottom tank 105 is connected with a water outlet pipe 110, and a filtering mechanism 2 is installed at the bottom of the top tank 101 and the top of the bottom tank 105;

[0027] The filtering mechanism 2 includes a storage plate 201, the top of the storage plate 201 is movably connected to the bottom of the top tank 101, the bottom of the storage plate 201 is movably connected to the top of the bottom tank 105, the bottom of the inner cavity of the storage plate 201 is fixedly connected to a filter plate 211, the front side of the filter plate 211 is fixedly connected to a connecting plate 207, the inner cavity of the connecting plate 207 is fixedly connected to a rotating rod 206, the top and bottom of the surface of the rotating rod 206 are both movably connected to a rotating plate 208, the right side of the rotating plate 208 is fixedly connected to an outer ring 210, the middle part of the surface of the rotating rod 206 is movably connected to a rotating plate 1 205, the left side of the rotating plate 1 205 is fixedly connected to an outer ring 1 203, the left side of the outer ring 210 and the right side of the outer ring 1 203 are both movably connected to the surfaces of the top tank 101 and the bottom tank 105.

[0028] Specifically, the back side of the outer ring 1 203 is fixedly connected with the plug block 219, the back side of the outer ring 210 is fixedly connected with the outer frame 215, the left side of the inner cavity of the outer frame 215 is fixedly connected with the rotating shaft 217, the inner cavity of the rotating shaft 217 is movably connected with the special-shaped plate 218, the right side of the front side of the special-shaped plate 218 is fixedly connected with the filter plate 211, and the front side of the filter plate 211 is plugged into the inner cavity of the plug block 219.

[0029] Through the above technical solution, the special-shaped plate 218 is pressed inward by hand, and then the special-shaped plate 218 is rotated around the rotating shaft 217, and then the spring 216 is compressed, and then the plug block 219 is inserted into the inner cavity of the outer frame 215, and then the special-shaped plate 218 is released after reaching the specified position, and then the special-shaped plate 218 is restored to its original position under the action of the spring 216, and then the insertion rod 221 is inserted into the inner cavity of the positioning hole 220, thereby achieving the effect of fixing the outer ring 1 203 and the outer ring 2 210 in the working state.

[0030] Specifically, a positioning hole 220 is provided in the inner cavity of the insert block 219 , and the positioning hole 220 is arranged in a circular structure. A second spring 216 is fixedly connected to the right side of the back side of the outer frame 215 , and the back side of the second spring 216 is fixedly connected to the inner cavity of the outer frame 215 .

[0031] Through the above technical solution, by setting the positioning hole 220, the insertion rod 221 can be smoothly inserted into the inner cavity of the plug block 219, thereby achieving the effect of installing and disassembling the plug block 219. Through the setting of the spring 216, when the special-shaped plate 218 moves, the spring 216 will be compressed to absorb the energy of the force generated. Further, when the special-shaped plate 218 loses its force, the spring 216 will restore its deformation, thereby achieving the effect of fixing and disassembling the plug block 219.

[0032] Specifically, both sides of the front side of the outer ring 1 203 and the outer ring 2 210 are fixedly connected with connecting blocks 209, and the front side of the connecting block 209 is fixedly connected with a hand pull ring 204, and the hand pull ring 204 is arranged in a ring structure. The inner cavities of the outer ring 1 203 and the outer ring 2 210 are fixedly connected with sealing gaskets 202, and the inner sides of the sealing gaskets 202 are movably connected to the surfaces of the top tank 101 and the bottom tank 105.

[0033] Through the above technical scheme, through the setting of the connecting block 209, the outer ring 1 203, the outer ring 210 and the hand pull ring 204 are connected. Through the setting of the hand pull ring 204, it is easier for the operator to pull the outer ring 1 203 and the outer ring 210. Through the setting of the sealing gasket 202, the gap between the top tank 101, the storage plate 201 and the bottom tank 105 in the working state is sealed to avoid water leakage in the gap between the top tank 101, the storage plate 201 and the bottom tank 105.

[0034] Specifically, the top tank 101 is fixedly connected with positioning blocks 109 on all four sides, and the front and back sides of the inner cavities of the outer ring 1 203 and the outer ring 210 are movably connected with clamping blocks 214. The top of the surface of the clamping block 214 is clamped and connected to the inner cavity of the positioning block 109. The bottom of the clamping block 214 is fixedly connected with a spring 1 212. The bottoms of the spring 1 212 are respectively fixedly connected to the inner cavities of the outer ring 1 203 and the outer ring 210. The outer side of the clamping block 214 is fixedly connected with a hand pull plate 213, and the outer side of the hand pull plate 213 penetrates to the outer sides of the outer ring 1 203 and the outer ring 210.

[0035] Through the above technical scheme, the hand-pull plate 213 is pressed downward by hand, and the spring 1 212 is compressed by the movement of the hand-pull plate 213. Then, when the outer ring 1 203 and the outer ring 2 210 are fixed at the specified position, the hand-pull plate 213 is released, and then the clamping block 214 is restored to its original position under the action of the spring 1 212, and then the clamping block 214 is clamped in the inner cavity of the positioning block 109, thereby achieving the function of limiting the outer ring 1 203 and the outer ring 2 210 in the working state, and preventing the outer ring 1 203 and the outer ring 2 210 from rotating during the working process.

[0036] Specifically, a stirring mechanism 3 is installed on the top of the top tank 101, and the stirring mechanism 3 includes a servo motor 301. The bottom of the servo motor 301 is fixedly connected to the bottom of the top tank 101, and the output end of the servo motor 301 passes through the inner cavity of the top tank 101 and is fixedly connected to a support rod 302. A stirring rod 303 is fixedly connected to the surface of the support rod 302. There are multiple stirring rods 303. A reinforcement plate 304 is fixedly connected to the inner side of the surface of the stirring rod 303. The reinforcement plate 304 is arranged in an arc-shaped structure.

[0037] Through the above technical solution, by starting the servo motor 301, the support rod 302 is driven to rotate through the operation of the servo motor 301, and then the stirring rod 303 is driven to rotate, and then the reinforcement plate 304 is driven to move, so as to achieve the effect of fully mixing and reacting the wastewater and heavy metal capture agent in the inner cavity of the top tank 101.

[0038] Specifically, connecting rods 106 are fixedly connected to both sides of the top tank 101, the bottom of the inner side of the connecting rods 106 is fixedly connected to both sides of the bottom tank 105, the top of the surface of the top tank 101 is fixedly connected to a fixing plate 102, the four corners of the bottom of the fixing plate 102 are fixedly connected to pillars 103, and the bottom of the pillars 103 is fixedly connected to the bottom plate 104.

[0039] Through the above technical scheme, by setting the connecting rod 106, the top tank 101 and the bottom tank 105 are connected and fixed. By setting the fixing plate 102, the support 103 and the bottom plate 104, the top tank 101 in the working state is supported and fixed, thereby preventing the top tank 101 from collapsing during operation.

[0040] The working principle of the utility model is: first, the hand pull ring 204 is moved to the back side by hand, and then the connecting block 209 is driven to move to the back side. At the same time, the hand pull plate 213 is pressed downward by hand, and the spring 1 212 is compressed by the movement of the hand pull plate 213. Then, when the outer ring 1 203 and the outer ring 210 reach the specified position and are fixed, the hand pull plate 213 is released, and then the clamping block 214 is restored to its original position under the action of the spring 1 212, and then the clamping block 214 is clamped in the inner cavity of the positioning block 109, thereby achieving the effect of limiting the outer ring 1 203 and the outer ring 2 210 in the working state, and preventing the outer ring 1 203 and the outer ring 2 210 from rotating during the working process. Then, the receiving plate 201 is placed at the bottom of the top tank 101 and the top of the bottom tank 105, and then the filter plate 211 is placed between the top tank 101 and the bottom tank 105, and then the outer ring 1 203 and the outer ring 2 210 are rotated inward by hand, and the rotation of the outer ring 1 203 and the outer ring 210 drives the rotating plate 1 205 and the rotating plate 208 to rotate, and then the special-shaped plate 218 is pressed forward by hand, and then the insertion rod 221 is driven to move, and then the insertion block 219 is driven to be inserted into the inner cavity of the outer frame 215 through the movement of the outer ring 1 203, and then the special-shaped plate 218 is released after reaching the specified position, and then the special-shaped plate 218 is restored to its original position under the action of the spring 216, and then the working state is achieved. The outer ring 1 203 and the outer ring 2 210 are fixed, and then the servo motor 301 is started, and the support rod 302 is driven to rotate by the work of the servo motor 301, and then the stirring rod 303 is driven to rotate, and then the reinforcing plate 304 is driven to move, so as to achieve the effect of fully mixing and reacting the wastewater and the heavy metal capture agent in the inner cavity of the top tank 101, and then the wastewater is poured into the inner cavity of the top tank 101 through the water inlet pipe 107, and then the heavy metal capture agent is poured into the inner cavity of the top tank 101 through the drug inlet pipe 108, and then fully mixed by the stirring rod 303, and then the flocculent precipitate after the reaction is filtered through the filter plate 211, and then collected and filtered in the inner cavity of the receiving plate 201. The water after is discharged through the outlet pipe 110, and finally the special-shaped plate 218 is pressed inward by hand, and then the special-shaped plate 218 is rotated around the rotating shaft 217, and then the spring 216 is compressed, and then the insertion rod 221 is separated from the inner cavity of the positioning hole 220, and then the hand-pull plate 213 is pulled downward by hand, and then the block 214 is moved, and then the hand-pull ring 204 is pulled outward by hand, and the outer ring 1 203 and the outer ring 2 210 are opened through the movement of the hand-pull ring 204, and then the outer ring 1 203 and the outer ring 2 210 are pulled forward by hand, and then the storage plate 201 and the filter plate 211 are moved, so as to achieve the purpose of collecting and processing the collected flocculent precipitation.

[0041] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heavy metal capture agent screening device for wastewater treatment, comprising a screening device body (1), characterized in that: The screening device body (1) comprises a top tank (101), the left side of the top of the top tank (101) is connected to a medicine inlet pipe (108), the right side of the top of the top tank (101) is connected to a water inlet pipe (107), a bottom tank (105) is installed at the bottom of the top tank (101), the bottom of the bottom tank (105) is connected to a water outlet pipe (110), and a filtering mechanism (2) is installed at the bottom of the top tank (101) and the top of the bottom tank (105); The filtering mechanism (2) comprises a receiving plate (201), the top of the receiving plate (201) being movably connected to the bottom of the top tank (101), the bottom of the receiving plate (201) being movably connected to the top of the bottom tank (105), a filter plate (211) being fixedly connected to the bottom of the inner cavity of the receiving plate (201), a connecting plate (207) being fixedly connected to the front side of the filter plate (211), a rotating rod (206) being fixedly connected to the inner cavity of the connecting plate (207), and the rotating rod (206) being fixedly connected to the inner cavity of the connecting plate (207). The top and bottom of the surface of the rod (206) are movably connected to a rotating plate 2 (208), the right side of the rotating plate 2 (208) is fixedly connected to an outer ring 2 (210), the middle of the surface of the rotating rod (206) is movably connected to a rotating plate 1 (205), the left side of the rotating plate 1 (205) is fixedly connected to an outer ring 1 (203), and the left side of the outer ring 2 (210) and the right side of the outer ring 1 (203) are both movably connected to the surfaces of the top tank (101) and the bottom tank (105).

2. A heavy metal scavenger screening device for wastewater treatment according to claim 1, characterized in that: The back side of the outer ring 1 (203) is fixedly connected to an insert block (219), the back side of the outer ring 2 (210) is fixedly connected to an outer frame (215), the left side of the inner cavity of the outer frame (215) is fixedly connected to a rotating shaft (217), the inner cavity of the rotating shaft (217) is movably connected to a special-shaped plate (218), the right side of the front side of the special-shaped plate (218) is fixedly connected to a filter plate (211), and the front side of the filter plate (211) is plugged into the inner cavity of the insert block (219).

3. A heavy metal capture agent screening device for wastewater treatment according to claim 2, characterized in that: The inner cavity of the insert block (219) is provided with a positioning hole (220), and the positioning hole (220) is arranged in a circular structure. The right side of the back side of the outer frame (215) is fixedly connected to a second spring (216), and the back side of the second spring (216) is fixedly connected to the inner cavity of the outer frame (215).

4. The heavy metal scavenger screening device for wastewater treatment according to claim 1, characterized in that: Both sides of the front side of the outer ring one (203) and the outer ring two (210) are fixedly connected with connecting blocks (209), and the front side of the connecting block (209) is fixedly connected with a hand pull ring (204), and the hand pull ring (204) is arranged in a ring structure. The inner cavities of the outer ring one (203) and the outer ring two (210) are fixedly connected with sealing gaskets (202), and the inner sides of the sealing gaskets (202) are movably connected to the surfaces of the top tank (101) and the bottom tank (105).

5. The heavy metal scavenger screening device for wastewater treatment according to claim 1, characterized in that: The top tank (101) is fixedly connected with positioning blocks (109) on all four sides, and the front and back sides of the inner cavities of the outer ring one (203) and the outer ring two (210) are movably connected with clamping blocks (214). The top of the surface of the clamping block (214) is clamped and connected to the inner cavity of the positioning block (109). The bottom of the clamping block (214) is fixedly connected with a spring one (212). The bottom of the spring one (212) is respectively fixedly connected to the inner cavities of the outer ring one (203) and the outer ring two (210). The outer side of the clamping block (214) is fixedly connected with a hand pull plate (213), and the outer side of the hand pull plate (213) passes through the outer sides of the outer ring one (203) and the outer ring two (210).

6. A heavy metal capture agent screening device for wastewater treatment according to claim 1, characterized in that: A stirring mechanism (3) is installed on the top of the top tank (101), and the stirring mechanism (3) comprises a servo motor (301). The bottom of the servo motor (301) is fixedly connected to the bottom of the top tank (101). The output end of the servo motor (301) passes through the inner cavity of the top tank (101) and is fixedly connected to a support rod (302). A stirring rod (303) is fixedly connected to the surface of the support rod (302). There are a plurality of stirring rods (303). A reinforcing plate (304) is fixedly connected to the inner side of the surface of the stirring rod (303). The reinforcing plate (304) is arranged in an arc-shaped structure.

7. A heavy metal capture agent screening device for wastewater treatment according to claim 1, characterized in that: The top tank (101) is fixedly connected to connecting rods (106) on both sides, the bottom of the inner side of the connecting rods (106) is fixedly connected to both sides of the bottom tank (105), the top of the surface of the top tank (101) is fixedly connected to a fixing plate (102), the four corners of the bottom of the fixing plate (102) are fixedly connected to pillars (103), and the bottom of the pillars (103) is fixedly connected to the bottom plate (104).

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