Demolition blasting water curtain dust falling device

Abstract

The utility model discloses a demolition blasting water curtain dust falling device, which belongs to the technical field of engineering blasting and comprises a base, driving wheels are arranged at four corners of the bottom end of the base, two symmetrically distributed storage grooves are formed in the bottom end of the base, a supporting assembly is arranged at the bottom end of the base, and a box body and a mounting plate are fixedly mounted at the top end of the base. A protection plate is arranged on the side, away from the box body, of the mounting plate, a plurality of buffering assemblies distributed in a linear array mode are arranged between the protection plate and the mounting plate, and a stabilizing assembly is arranged on the side, away from the mounting plate, of the box body. And a connecting pipe is rotationally mounted on one side, away from the box body, of the mounting plate. Through cooperation of the water suction pump, the main spray head and the auxiliary spray head, the spraying and dust falling effects are achieved, the driving assembly drives the first pipeline to drive the main spray head and the auxiliary spray head to rotate synchronously, the spraying range of the equipment is increased, and then the dust falling effect of the equipment is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering blasting, and more specifically to a demolition blasting water curtain dust reduction device. Background Art

[0002] A tunnel is an engineering building buried in the ground. It is a form of human utilization of underground space. Its structure consists of two parts: the main building and ancillary equipment. During the construction of the tunnel, in order to ensure the accurate completion of each stage of the project, blasting is usually used to excavate the soil. However, a large amount of dust will be generated during the tunnel blasting process. It will spread everywhere with the shock wave, polluting the environment and affecting human health. Therefore, water curtain dust reduction equipment is used to remove the dust generated by the blasting.

[0003] The patent with application number 202122700469.4 discloses an engineering blasting protection device, including a base and a protective plate arranged on the top of the base, a dust suppression device for dust prevention is arranged on the top of the protective plate, and a water supply device for supplying water to the dust suppression device is arranged on the front of the protective plate; the dust suppression device includes a limit frame, the limit frame is connected to the top of the protective plate, and a servo motor is fixedly installed on one side of the limit frame. The utility model controls the boost pump to start the boost by setting a controller, and then transports the water inside the water tank to the inside of the dust suppression nozzle through the cooperation between the connecting pipe and the water supply pipe, and then controls the servo motor to start and drive the adjustment screw to rotate through the controller, and the rotation of the adjustment screw drives the threaded sleeve to move left and right, and the movement of the threaded sleeve to the left and right drives the dust suppression nozzle to move left and right, which can effectively enhance the dust reduction range of the dust suppression nozzle and achieve the advantage of good dust prevention effect.

[0004] Regarding the above-mentioned related technologies, the dust reduction nozzle can be driven to move left and right by rotating the screw, which can indeed expand the dust reduction range of the dust reduction nozzle. However, when the nozzle moves to the left, it cannot block the dust on the right. Similarly, when the nozzle moves to the right, it cannot block the dust on the left. Although the dust reduction range is expanded, dust is not reduced in a large range at the same time, which makes it impossible to block all dust and the dust reduction effect is poor. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a demolition blasting water curtain dust reduction device, which adopts the following technical solutions:

[0006] A demolition blasting water curtain dust suppression device, comprising a base, driving wheels are arranged at the four corners of the bottom end of the base, two symmetrically distributed storage grooves are arranged at the bottom end of the base, a supporting assembly is arranged at the bottom end of the base, a box body and a mounting plate are fixedly installed at the top end of the base, a protective plate is arranged on the side of the mounting plate away from the box body, a plurality of buffer assemblies distributed in a linear array are arranged between the protective plate and the mounting plate, and a stabilizing assembly is arranged on the side of the box body away from the mounting plate;

[0007] A connecting pipe is rotatably installed on the side of the mounting plate away from the box body, and a water guide box is fixedly connected to one end of the connecting pipe away from the mounting plate. A main nozzle is provided at one end of the water guide box away from the connecting pipe, and a plurality of branch pipes distributed in a circular array are fixedly installed on the side wall of the water guide box, and auxiliary nozzles are provided on the ends of the branch pipes away from the water guide box. The connecting pipe includes a first pipe arranged on the side of the water guide box away from the main nozzle, and a second pipe is rotatably connected to one end of the first pipe away from the water guide box. One end of the connecting pipe away from the water guide box passes through the mounting plate, and a water pump is fixedly installed in the box body, a conduit is fixedly connected between one end of the water pump and the end opposite to the second pipe, and a driving assembly is provided on the side wall of the first pipe.

[0008] By adopting the above technical scheme, when the equipment is used, the staff moves the equipment to the blasting area through the driving wheel, and then drives the equipment to rise through the support component, so that the driving wheel is separated from the ground, which can play a role in supporting and stabilizing the equipment. Then, through the operation of the stabilizing component, it can further support and stabilize the equipment, which is beneficial to maintaining the stability of the equipment. After the equipment is stabilized, the water source in the box is introduced into the conduit through the operation of the water pump, and then the water source enters the water guide box through the connecting pipe. The water source is sprayed out through the main nozzle and the auxiliary nozzle to form a water curtain, which can play a role in dust reduction and help reduce dust diffusion. The first pipe can be driven by the driving component to rotate synchronously with the main nozzle and the auxiliary nozzle, which is beneficial to increase the spray range of the equipment, and then it is beneficial to improve the dust reduction efficiency of the equipment. A protective plate is set on one side of the mounting plate, and a buffer component is provided between the protective plate and the mounting plate. When blasting, impact force may be generated. The impact force acts on the protective plate, and the protective plate drives the buffer component to operate, which can play a buffering role and play the role of protecting the equipment.

[0009] Furthermore, the support assembly includes a cylinder fixedly mounted on the inner wall of the top end of the storage groove, two support blocks are fixedly mounted on the ends of the two cylinder piston shafts, and two support plates are fixedly mounted on the bottom ends of the two support blocks.

[0010] By adopting the above technical solution, when the equipment is moved to a suitable location, the cylinder drives the support blocks and the support plate of the same group to descend synchronously, so that the bottom end of the support plate contacts the ground, and then the equipment as a whole rises under the continuous driving force of the cylinder, so that the driving wheel is separated from the ground, which can play a role in supporting and stabilizing the equipment.

[0011] Furthermore, the buffer assembly includes a plurality of pillars fixedly mounted on a side of a mounting plate away from a box body, each pillar has an end away from the box body provided with a movable groove, each movable groove has a support rod slidably mounted therein, a spring is fixedly connected between one end of the support rod away from a protective plate and an inner wall of a side opposite to the movable groove of the same group, and one end of the support rod away from the mounting plate is fixedly connected to a side opposite to the protective plate.

[0012] By adopting the above technical solution, when the impact force acts on the protective plate, the protective plate pushes the support rod to slide in the same group of movable grooves, and the support rod pushes the same group of springs to contract. The springs give the same group of support rods a rebound force, which can play a buffering role and achieve a protective effect.

[0013] Furthermore, two symmetrically distributed limit blocks are fixedly mounted on the side wall of one end of the support rod away from the protective plate, and the inner wall of the movable groove is provided with a limit groove matching the limit blocks in the same group.

[0014] By adopting the above technical solution, when the support rod slides in the same group of movable grooves, the support rod slides in the limiting groove with the limiting block. The cooperation between the limiting block and the limiting groove is conducive to maintaining the sliding stability of the support rod.

[0015] Furthermore, the stabilizing component includes a stabilizing plate arranged on the side of the box away from the mounting plate, and two symmetrically distributed stabilizing rods are hinged on the side of the box away from the mounting plate, and the two stabilizing rods are hinged to the top of the stabilizing plate at one end away from the box, and two symmetrically distributed positioning cones are provided on the top of the stabilizing plate, and the bottom ends of the two positioning cones pass through the stabilizing plate.

[0016] By adopting the above technical solution, when the equipment is initially stabilized, the staff moves the stabilizing plate and the stabilizing rod so that the bottom end of the stabilizing plate contacts the ground, and then passes through the stabilizing plate through the positioning cone and extends into the soil. The stabilizing plate is positioned by the positioning cone, and the cooperation of the stabilizing plate and the stabilizing rod further supports the stabilizing equipment, which is beneficial to maintaining the stability of the equipment during use.

[0017] Furthermore, the driving assembly includes a driven gear fixedly sleeved with a first pipe side wall, a reduction motor is fixedly mounted on the top of the box body, a driving gear is fixedly sleeved at the end of the reduction motor output shaft, and the driving gear is meshed with the driven gear.

[0018] By adopting the above technical solution, the reduction motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear drives the first pipe to rotate, and the first pipe drives the water guide box, branch pipe, main nozzle and auxiliary nozzle to rotate synchronously, which is beneficial to increase the spraying range of the equipment, and then help to improve the dust reduction effect of the equipment.

[0019] Furthermore, a mounting plate is fixedly sleeved on the side wall of one end of the first pipe close to the water guide box, and an annular groove is provided on the mounting plate close to the water guide box, in which a plurality of stabilizing blocks distributed in a circular array are slidably installed, and the plurality of stabilizing blocks close to the water guide box are fixedly connected to the side opposite to the mounting plate.

[0020] By adopting the above technical solution, when the first pipe rotates, the first pipe rotates with the mounting plate, and the mounting plate slides with the stabilizing block in the annular groove. The cooperation of the mounting plate, the stabilizing block and the buffer groove is helpful to maintain the rotation stability of the main nozzle and the auxiliary nozzle.

[0021] In summary, the utility model includes the following beneficial technical effects:

[0022] (1) In the utility model, the water pump, the main nozzle and the auxiliary nozzle cooperate to achieve the effect of spraying and dust reduction, and the driving assembly drives the first pipe to rotate synchronously with the main nozzle and the auxiliary nozzle, which is beneficial to increase the spray range of the equipment and further helps to maintain the dust reduction effect of the equipment.

[0023] (2) In the present invention, the provision of the protective plate and the buffer assembly can play a protective role, helping to prevent stone fragments from directly hitting the equipment during blasting, thereby helping to maintain the use effect of the equipment.

[0024] (3) In the present invention, the supporting component is provided to support and stabilize the device, and the stabilizing component is provided to further support and stabilize the device, which is beneficial to maintaining the stability of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a demolition blasting water curtain dust suppression device from a first perspective;

[0026] Figure 2 For this utility model Figure 1 A magnified view of middle;

[0027] Figure 3 It is a structural schematic diagram of the second viewing angle of the utility model;

[0028] Figure 4 For this utility model Figure 3 Enlarged view of middle B;

[0029] Figure 5 It is a cross-sectional view of the utility model;

[0030] Figure 6 For this utility model Figure 5 Enlarged view of middle C;

[0031] Figure 7 This is a display diagram of the structures of the water pump, connecting pipe, water guide box, etc. in the utility model.

[0032] Description of the numbers in the figure:

[0033] 1. Base; 2. Support plate; 3. Support block; 4. Cylinder; 5. Mounting plate; 6. Pillar; 61. Movable groove; 611. Spring; 7. Support rod; 8. Protective plate; 9. Conduit; 10. Box; 101. Water pump; 11. Stabilizing rod; 12. Stabilizing plate; 13. Positioning cone; 14. Main nozzle; 15. Auxiliary nozzle; 16. Branch pipe; 17. Mounting plate; 18. Stabilizing block; 19. Reducer motor; 20. Driving gear; 21. Connecting pipe; 211. First pipeline; 212. Second pipeline; 22. Driven gear; 23. Storage groove; 24. Water guide box. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The following is combined with Figure 1-7 The utility model is described in further detail.

[0038] See also Figure 1-7A demolition blasting water curtain dust suppression device comprises a base 1, driving wheels are arranged at the four corners of the bottom end of the base 1, two symmetrically distributed storage grooves 23 are arranged at the bottom end of the base 1, and a supporting assembly is arranged at the bottom end of the base 1, and the supporting assembly comprises a cylinder 4 fixedly mounted on the inner wall of the top end of the storage groove 23, and support blocks 3 are fixedly mounted on the ends of the piston shafts of the two cylinders 4, and support plates 2 are fixedly mounted on the bottom ends of the two support blocks 3. When the equipment is used, the staff moves the equipment to the blasting area through the driving wheels, and drives the support blocks 3 and the support plates 2 of the same group to descend synchronously through the cylinders 4, so that the bottom end of the support plates 2 contacts the ground, and then the equipment is lifted as a whole under the continuous driving force of the cylinders 4, so that the driving wheels are separated from the ground, which can play the role of supporting and stabilizing the equipment.

[0039] A stabilizing component is provided on the side of the box 10 away from the mounting plate 5, and the stabilizing component includes a stabilizing plate 12 arranged on the side of the box 10 away from the mounting plate 5. Two symmetrically distributed stabilizing rods 11 are hinged on the side of the box 10 away from the mounting plate 5, and the two stabilizing rods 11 are hinged to the top of the stabilizing plate 12 at one end away from the box 10. Two symmetrically distributed positioning cones 13 are provided on the top of the stabilizing plate 12, and the bottom ends of the two positioning cones 13 both penetrate the stabilizing plate 12. After the equipment is initially stabilized, the staff moves the stabilizing plate 12 and the stabilizing rod 11 to make the bottom end of the stabilizing plate 12 contact with the ground, and then penetrates the stabilizing plate 12 and extends into the soil through the positioning cone 13, and positions the stabilizing plate 12 through the positioning cone 13. Through the cooperation of the stabilizing plate 12 and the stabilizing rod 11, it plays a role in further supporting and stabilizing the equipment, which is beneficial to maintaining the stability of the equipment when used.

[0040] A box body 10 and a mounting plate 5 are fixedly installed on the top of the base 1, a protective plate 8 is provided on the side of the mounting plate 5 away from the box body 10, and a plurality of buffer components distributed in a linear array are provided between the protective plate 8 and the mounting plate 5. The buffer component includes a plurality of pillars 6 fixedly installed on the side of the mounting plate 5 away from the box body 10, and a movable groove 61 is opened at the end of the pillar 6 away from the box body 10, and a support rod 7 is slidably installed in the movable groove 61. A spring 611 is fixedly connected between the inner wall of the side opposite to the movable groove 61 of the same group at the end of the support rod 7 away from the protective plate 8, and the end of the support rod 7 away from the mounting plate 5 is fixedly connected to the side opposite to the protective plate 8. When the impact force acts on the protective plate 8, the protective plate 8 pushes the support rod 7 to slide in the movable groove 61 of the same group, and the support rod 7 pushes the spring 611 of the same group to contract. The spring 611 gives the support rod 7 of the same group a rebound force, which can play a buffering role and achieve a protective effect.

[0041] Two symmetrically distributed limit blocks are fixedly installed on the side wall of the support rod 7 away from the protective plate 8. The inner wall of the movable groove 61 is provided with a limit groove matching the limit blocks of the same group. When the support rod 7 slides in the movable groove 61 of the same group, the support rod 7 slides in the limit groove with the limit block. The cooperation between the limit block and the limit groove is conducive to maintaining the sliding stability of the support rod 7 and helps to maintain the sliding stability of the support rod 7.

[0042] A connecting pipe 21 is rotatably mounted on the side of the mounting plate 5 away from the box body 10, and a water guide box 24 is fixedly connected to the end of the connecting pipe 21 away from the mounting plate 5. A main nozzle 14 is provided at the end of the water guide box 24 away from the connecting pipe 21. A plurality of branch pipes 16 distributed in a circular array are fixedly mounted on the side wall of the water guide box 24. A secondary nozzle 15 is provided at the end of the branch pipe 16 away from the water guide box 24. The connecting pipe 21 includes a first pipe 211 arranged on the side of the water guide box 24 away from the main nozzle 14, and the end of the first pipe 211 away from the water guide box 24 is rotatably connected to the second pipe The first pipe 211 is provided with a driving assembly, and the driving assembly includes a driven gear 22 fixedly sleeved with the side wall of the first pipe 211. A reduction motor 19 is fixedly installed on the top of the box 10. A driving gear 20 is fixedly sleeved on the end of the output shaft of the reduction motor 19, and the driving gear 20 is meshed with the driven gear 22.

[0043] When the equipment is stabilized, the water source in the box 10 is introduced into the conduit 9 through the operation of the water pump 101, and then the water source enters the water guide box 24 through the connecting pipe 21. The water source is sprayed out through the main nozzle 14 and the auxiliary nozzle 15 to form a water curtain, which can play a role in dust reduction and help reduce dust diffusion. The driving gear 20 is driven to rotate by the reduction motor 19, and the driving gear 20 drives the driven gear 22 to rotate. The driven gear 22 drives the first pipe 211 to rotate. The first pipe 211 rotates with the water guide box 24, the branch pipe 16, the main nozzle 14 and the auxiliary nozzle 15, which is beneficial to increase the spray range of the equipment, and then to improve the dust reduction effect of the equipment.

[0044] A mounting plate 17 is fixedly sleeved on the side wall of one end of the first pipe 211 near the water guide box 24, and an annular groove is opened on the side of the mounting plate 17 near the water guide box 24, and a plurality of stabilizing blocks 18 distributed in an annular array are slidably installed in the annular groove, and the plurality of stabilizing blocks 18 are fixedly connected to the side opposite to the mounting plate 17 near the water guide box 24. When the first pipe 211 rotates, the first pipe 211 rotates with the mounting plate 17, and the mounting plate 17 slides in the annular groove with the stabilizing blocks 18. The cooperation of the mounting plate 17, the stabilizing blocks 18 and the buffer groove is conducive to maintaining the rotation stability of the main nozzle 14 and the auxiliary nozzle 15.

[0045] The implementation principle of the embodiment of the utility model is as follows: when the equipment is in use, the staff moves the equipment to the blasting area through the driving wheel, and then drives the equipment to rise through the supporting assembly, so that the driving wheel is separated from the ground, which can play a role in supporting and stabilizing the equipment. Then, the stabilizing assembly is operated to further support and stabilize the equipment, which is beneficial to maintaining the stability of the equipment. After the equipment is stabilized, the water source in the box 10 is introduced into the conduit 9 through the operation of the water pump 101, and then the water source enters the water guide box 24 through the connecting pipe 21. The water source is sprayed out through the main nozzle 14 and the auxiliary nozzle 15 to form a water curtain, which can play a role in dust reduction and help reduce dust diffusion. The first pipe 211 can be driven by the driving assembly to rotate synchronously with the main nozzle 14 and the auxiliary nozzle 15, which is beneficial to increase the spray range of the equipment, and then it is beneficial to improve the dust reduction efficiency of the equipment. A protective plate 8 is set on one side of the mounting plate 5, and a buffer assembly is provided between the protective plate 8 and the mounting plate 5. When blasting, impact force may be generated, and the impact force acts on the protective plate 8. The protective plate 8 drives the buffer assembly to operate, which can play a buffering role and play a role in protecting the equipment.

[0046] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A demolition blasting water curtain dust suppression device, comprising a base (1), characterized in that: The four corners of the bottom of the base (1) are provided with driving wheels, the bottom of the base (1) is provided with two symmetrically distributed storage grooves (23), the bottom of the base (1) is provided with a supporting assembly, the top of the base (1) is fixedly provided with a box body (10) and a mounting plate (5), a protective plate (8) is provided on the side of the mounting plate (5) away from the box body (10), a plurality of buffer assemblies distributed in a linear array are provided between the protective plate (8) and the mounting plate (5), and a stabilizing assembly is provided on the side of the box body (10) away from the mounting plate (5); A connecting pipe (21) is rotatably mounted on a side of the mounting plate (5) away from the box body (10); one end of the connecting pipe (21) away from the mounting plate (5) is fixedly connected to a water guide box (24); one end of the water guide box (24) away from the connecting pipe (21) is provided with a main nozzle (14); a plurality of branch pipes (16) distributed in a circular array are fixedly mounted on the side wall of the water guide box (24); one end of each branch pipe (16) away from the water guide box (24) is provided with an auxiliary nozzle (15); the connecting pipe (21) comprises a nozzle arranged on the water guide box ( 24) a first pipe (211) away from the main nozzle (14) side, the first pipe (211) having one end away from the water guide box (24) being rotatably connected to the second pipe (212), the end of the connecting pipe (21) away from the water guide box (24) passing through the mounting plate (5), a water pump (101) being fixedly installed in the box body (10), a guide tube (9) being fixedly connected between one end of the water pump (101) and the end opposite to the second pipe (212), and a driving assembly being provided on the side wall of the first pipe (211).

2. The demolition blasting water curtain dust suppression device according to claim 1, characterized in that: The support assembly comprises a cylinder (4) fixedly mounted on the inner wall of the top end of the storage groove (23), the piston shaft ends of the two cylinders (4) are fixedly mounted with support blocks (3), and the bottom ends of the two support blocks (3) are fixedly mounted with support plates (2).

3. The demolition blasting water curtain dust suppression device according to claim 1, characterized in that: The buffer assembly comprises a plurality of pillars (6) fixedly mounted on a side of the mounting plate (5) away from the box body (10), each of the pillars (6) having an end away from the box body (10) having a movable groove (61), each of the movable grooves (61) having a support rod (7) slidably mounted therein, each of the ends of the support rods (7) away from the protective plate (8) having a spring (611) fixedly connected between an inner wall of a side opposite to the movable groove (61) of the same group, and each of the ends of the support rods (7) away from the mounting plate (5) having a fixed connection to a side opposite to the protective plate (8).

4. The demolition blasting water curtain dust suppression device according to claim 3, characterized in that: Two symmetrically distributed limit blocks are fixedly mounted on the side wall of the support rod (7) at one end away from the protective plate (8), and the inner wall of the movable groove (61) is provided with a limit groove matching the limit blocks in the same group.

5. The demolition blasting water curtain dust suppression device according to claim 1, characterized in that: The stabilizing component comprises a stabilizing plate (12) arranged on a side of the box body (10) away from the mounting plate (5); two symmetrically distributed stabilizing rods (11) are hingedly connected to the side of the box body (10) away from the mounting plate (5); and the ends of the two stabilizing rods (11) away from the box body (10) are hingedly connected to the top of the stabilizing plate (12); and the top of the stabilizing plate (12) is provided with two symmetrically distributed positioning cones (13), and the bottom ends of the two positioning cones (13) penetrate the stabilizing plate (12).

6. The demolition blasting water curtain dust suppression device according to claim 1, characterized in that: The driving assembly comprises a driven gear (22) fixedly sleeved with a side wall of the first pipe (211); a reduction motor (19) is fixedly mounted on the top of the housing (10); a driving gear (20) is fixedly sleeved on the end of the output shaft of the reduction motor (19); and the driving gear (20) is meshed with the driven gear (22).

7. The demolition blasting water curtain dust suppression device according to claim 1, characterized in that: A mounting plate (17) is fixedly sleeved on the side wall of one end of the first pipe (211) close to the water guide box (24); an annular groove is provided on the side of the mounting plate (17) close to the water guide box (24); a plurality of stabilizing blocks (18) distributed in an annular array are slidably mounted in the annular groove; the plurality of stabilizing blocks (18) close to the water guide box (24) are fixedly connected to the side opposite to the mounting plate (17) on the side opposite to the water guide box (24).

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