A wall drilling device for construction engineering

Abstract

The present invention relates to the technical field of drilling holes in construction projects, and specifically to a wall drilling device for construction projects, including a frame, a protrusion, a positioning plate, a first spring, a drilling machine handle, a drill bit, a mounting frame, etc.; the drilling machine handle and the drill bit are installed on the drilling machine body, and the drilling machine body is slidably installed on the frame through the drilling machine handle, and the frame and the drill bit are slidably installed at the end of the frame in the same direction as the drill bit, and a first spring is arranged between the positioning plate and the protrusion, and a mounting frame is arranged on the symmetrical inner wall of the frame close to the positioning plate, and a protective baffle is slidably arranged between the mounting frames. The positioning plate is fitted with the wall for positioning, and then the drill bit is aligned with the center point of the drilling hole, and the drilling machine body is fixed by the frame and the positioning plate, so as to avoid the drill bit from slipping and displacing when encountering a hard object during drilling, so as to realize the function of precise drilling operation.

Description

Technical Field

[0001] The invention relates to the technical field of drilling holes in construction engineering, and in particular to a wall drilling device for construction engineering. Background Art

[0002] Construction engineering refers to the planning, investigation, design, construction, completion and other technical work for the construction, renovation or expansion of buildings and ancillary facilities, as well as the installation of supporting lines, pipelines and equipment. After the final wall of the building is completed, some of them need to use drilling devices to punch holes in the wall, especially in the field of interior decoration.

[0003] In order to meet the needs of decoration, most of the drilling equipment used in indoor decoration are handheld, and the drilling operation is performed on the wall by manually holding the drilling device. When the existing drilling machine is drilling, the dust and debris generated during the drilling operation are easy to splash. At the same time, when the drill bit of the drilling device drills a hole in the wall, if the drill bit encounters a hard object, the drill bit is easy to slip, resulting in the defect of the drilling position being offset.

[0004] Based on this, there is an urgent need to design a wall drilling device for construction projects with dust reduction and precise drilling functions to solve the problems of drilling deviation and dust and debris splashing when the drill bit is drilling. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a wall drilling device for construction engineering, comprising a frame, a protrusion, a positioning plate, a first spring, a drill handle, a drill bit, a mounting frame, a protective baffle and a dust reduction mechanism. The drill handle and the drill bit are installed on the drill body, and the drill body is slidably installed on the frame through the drill handle. The positioning plate is slidably installed on the end of the frame in the same direction as the drill bit, the first spring is arranged between the positioning plate and the protrusion, the mounting frame is arranged on the symmetrical inner wall of the frame close to the positioning plate, the protective baffle is slidably arranged between the mounting frames, the drill bit passes through the protective baffle to perform drilling operation, and the dust generated by the drill bit during drilling operation is sprayed and dust reduced by the dust reduction mechanism installed on the frame.

[0006] Preferably, the dust reduction mechanism includes a water storage chamber, a water pipe, a nozzle, an N-type connecting rod and a piston. The water storage chamber is installed on the upper part of the frame, and the piston is movably arranged in the water storage chamber. The piston is connected to the drilling machine handle through the N-type connecting rod. The end of the water storage chamber facing the positioning plate is connected to the water pipe, and the end of the water pipe is connected to the nozzle. The nozzle is arranged above the drill bit. When the drilling machine handle slides, the piston is driven by the N-type connecting rod to slide along the inner wall of the water storage chamber so that the liquid in the water storage chamber is pressurized and transported to the nozzle through the water pipe.

[0007] Preferably, it also includes an n-shaped rod, a transverse top plate, a second spring and a connecting pipe. The n-shaped rod is provided at one end of the frame away from the positioning plate and the transverse top plate is slidably installed through the n-shaped rod. The second spring is wrapped around the connecting part between the n-shaped rod and the transverse top plate. The connecting pipe parallel to the n-shaped rod is connected to one end of the transverse top plate away from the n-shaped rod. The connecting pipe can be slidably inserted into the on-off port opened on the water pipe. A ramp block is provided at the contact between the transverse top plate and the drill handle.

[0008] Preferably, the connecting pipe is provided with a notch which matches with the on-off opening on the water pipe to connect the water pipe.

[0009] Preferably, it also includes a driving assembly for driving the protective baffle to fit into the wall, the driving assembly includes a first rack fixedly connected to the upper part of the positioning plate, a second rack connected to the side of the protective baffle facing away from the drill bit, and a gear meshing with the first rack and the second rack.

[0010] Preferably, the movement directions of the first rack and the second rack are opposite.

[0011] Preferably, the length of the second rack is less than or equal to the distance that the protective baffle can move along the mounting frame.

[0012] Preferably, it also includes a collection frame, a sliding member and a third spring. The collection frame and the sliding member are provided at the lower part of the frame in the same direction as the drill bit. One end of the sliding member is slidably connected to the bottom of the frame. The other end of the sliding member is n-shaped and the two ends of the n-shape are respectively connected to the positioning plate and the top cover slidably installed on the top of the collection frame. When the positioning plate slides along the frame, the top cover on the top of the collection frame is driven to move away from the collection frame and open through the n-shaped section of the sliding member. The third spring is also wound around the sliding member.

[0013] Preferably, it also includes an arc-shaped shock-absorbing plate and a fourth spring. The arc-shaped shock-absorbing plate is slidably installed on one end of the frame away from the positioning plate. The fourth spring is arranged between the arc-shaped shock-absorbing plate and the frame and is wound around the connecting piece connecting the arc-shaped shock-absorbing plate and the frame.

[0014] Preferably, the water storage cavity is provided with an observation window for conveniently observing the liquid level therein.

[0015] The beneficial effects of the present invention are as follows: 1. Position the drill by fitting the positioning plate against the wall, then align the drill bit with the center point of the hole, and fix the drilling machine body through the frame and the positioning plate to prevent the drill bit from slipping and shifting when encountering hard objects during drilling, so as to achieve the function of precise drilling operation; at the same time, the positioning plate drives the protective baffle to fit against the wall of the hole, thereby shielding the debris and dust generated during the drilling operation and preventing dust and debris from splashing.

[0016] 2. At the same time, when the drilling machine body moves toward the positioning plate with the drill bit, the drilling machine handle drives the N-type connecting rod to move toward the positioning plate, thereby driving the piston to move along the inner wall of the water storage chamber toward the drill bit. The liquid in the water storage chamber is pressurized and transported to the nozzle through the water pipe and sprayed on the drill hole, thereby realizing the dust reduction function.

[0017] 3. After completing the drilling operation, the drill handle is used to drive the drill body to slide to the left. When the drill handle slides to the left to the inclined block at the bottom of the horizontal top plate, the drill handle squeezes the inclined block of the horizontal top plate, thereby squeezing the horizontal top plate upward. The horizontal top plate drives the connecting pipe to move upward, so that the opening position of the connecting pipe is away from the on-off port, and the physical part of the connecting pipe blocks the on-off port, thereby realizing the function of blocking the water pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the components such as the frame, positioning plate and drilling machine body of the present invention.

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the protection baffle of the present invention in coordination with the frame, the drilling machine body and other components.

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the frame of the present invention after horizontal rotation of 180 degrees and the components installed on the frame.

[0022] Figure 5It is a schematic diagram of the three-dimensional structure of the cooperation between the transverse top plate, the connecting pipe and the drilling machine handle of the present invention.

[0023] Figure 6 For the present invention Figure 5 A local enlarged schematic diagram of point A.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the connecting pipe and the on-off port of the present invention.

[0025] Figure 8 It is a three-dimensional structural schematic diagram of components such as the frame, the collecting frame and the arc-shaped shock-absorbing plate of the present invention.

[0026] The marks in the accompanying drawings are: 1-frame, 101-bump, 2-positioning plate, 3-first spring, 4-drilling machine body, 41-drilling machine handle, 42-drill bit, 5-mounting frame, 6-protective baffle, 7-water storage chamber, 8-water pipe, 81-on / off port, 82-filling port, 9-nozzle, 10-n-type connecting rod, 11-piston, 12-n-type rod, 13-transverse top plate, 14-second spring, 15-connecting pipe, 16-first rack, 17-second rack, 18-gear, 19-collection frame, 20-sliding member, 21-third spring, 22-arc-shaped shock-absorbing plate, 23-fourth spring. DETAILED DESCRIPTION

[0027] 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.

[0028] Embodiment: A wall drilling device for construction engineering, such as Figure 1 , Figure 2 and Figure 3As shown, it includes a frame 1, a protrusion 101, a positioning plate 2, a first spring 3, a drilling machine handle 41, a drill bit 42, a mounting frame 5, a protective baffle 6 and a dust reduction mechanism. The drilling machine handle 41 and the drill bit 42 are installed on the drilling machine body 4. The drilling machine body 4 is slidably installed on the frame 1 through the drilling machine handle 41. The frame 1 includes four long cross bars, two vertical bars, two short cross bars and a horizontal bottom plate. Two positioning plates 2 are slidably installed at the ends of the frame 1 in the same direction as the drill bit 42. The positioning plates 2 are sleeved on the long cross bars of the frame 1. The side of the positioning plates 2 facing away from the frame 1 is anti-slip. The outer walls of the long cross bars of the frame 1 are all provided with protrusions 101. The protrusions 101 are close to the positioning plates 2. A first spring 3 is arranged between the positioning plates 2 and the protrusions 101. The arrangement of the first spring 3 allows the positioning plates 2 to maintain a sleeved state with the frame 1. The initial state of the first spring 3 is shown in FIG. Figure 2 As shown, a mounting frame 5 is arranged on the symmetrical inner wall of the frame 1 close to the positioning plate 2. The mounting frame 5 is arranged on the upper long horizontal bar of the frame 1. A protective baffle 6 is slidably arranged between the mounting frames 5. The distance that the positioning plate 2 moves along the upper long horizontal bar of the frame 1 must be greater than or equal to the distance that the protective baffle 6 can move along the mounting frame 5. The drill bit 42 passes through the protective baffle 6 for drilling operation, and the dust generated by the drill bit 42 during the drilling operation is sprayed and dusted by the dust reduction mechanism installed on the frame 1.

[0029] like Figure 5 and Figure 6 As shown, it also includes a driving component for driving the protective baffle 6 to fit against the wall, the driving component includes a first rack 16 fixedly connected to the upper part of the positioning plate 2, a second rack 17 connected to the side of the protective baffle 6 facing away from the drill bit 42, and a gear 18 meshing with the first rack 16 and the second rack 17. The movement directions of the first rack 16 and the second rack 17 are opposite, and the length of the second rack 17 is less than or equal to the distance that the protective baffle 6 can move along the mounting frame 5. The positioning plate 2 slides along the long horizontal bar on the upper part of the frame 1, and the first spring 3 is compressed and deformed. The positioning plate 2 drives the first rack 16 to move in the direction away from the wall. The first rack 16 drives the second rack 17 and the protective baffle 6 connected to the second rack 17 to move in the direction of the wall through the gear 18, thereby making the protective baffle 6 fit against the wall, blocking the dust and debris generated by the drill bit 42 when drilling holes on the wall to prevent them from splashing.

[0030] When in use, the frame 1 is placed against the wall where a hole needs to be drilled, and the positioning plate 2 is brought into contact with the wall so that the drill bit 42 is facing the center point of the hole. The frame 1 is then supported by the operator's body, and the drilling machine handle 41 is operated by both hands to drive the drilling machine body 4 and the drill bit 42 to move toward the wall, so that the drill bit 42 approaches the drilling position, thereby ensuring that the center point of the drill bit 42 coincides with the center point of the hole, ensuring accurate drilling. The drilling machine body 4 and the drill bit 42 are installed on the frame 1, and the frame 1 is fitted with the wall through the positioning plate 2. Even if the drill bit 42 encounters a hard object during the drilling operation, the drill bit 42 will not slip to the outside of the hard object due to the limitation of the frame 1 on the drilling machine body 4, thereby The drill bit 42 is effectively prevented from being offset due to the drill bit 42 encountering a hard object during drilling, which causes the hand to be unable to tightly grip the drill handle 41, thereby further ensuring the function of precise drilling operation; when the positioning plate 2 contacts the wall, the wall blocks the positioning plate 2, and the positioning plate 2 slides along the frame 1 and compresses the first spring 3. When the positioning plate 2 slides, it drives the first rack 16 to move away from the wall. The first rack 16 drives the second rack 17 to move toward the positioning plate 2 through the gear 18, thereby pushing the protective baffle 6 to one side of the wall and making it fit against the wall, thereby blocking the dust and debris generated by the drill bit 42 when drilling a hole in the wall to prevent it from splashing.

[0031] like Figure 1 and Figure 4 As shown, the dust suppression mechanism includes a water storage cavity 7, a water delivery pipe 8, a nozzle 9, an n-type connecting rod 10 and a piston 11. The water storage cavity 7 is installed on the upper part of the frame 1. The water storage cavity 7 is provided with an observation window for observing the liquid level therein. The piston 11 is slidably arranged in the water storage cavity 7. The piston 11 is connected to the drilling machine handle 41 through the n-type connecting rod 10. The end of the water storage cavity 7 facing the positioning plate 2 is connected to the water delivery pipe 8. The end of the water delivery pipe 8 is connected to the nozzle 9. The nozzle 9 is arranged above the drill bit 42. When the drilling machine handle 41 slides, the nozzle 9 is connected to the drilling machine handle 41 through the n-type connecting rod 10. The piston 11 is driven to slide along the inner wall of the water storage cavity 7 toward the positioning plate 2 so as to pressurize and deliver the liquid in the water storage cavity 7 to the nozzle 9 through the water delivery pipe 8. The nozzle 9 sprays the dust reduction liquid toward the position where the drill bit 42 drills a hole in the wall, thereby spraying and reducing the dust generated when the drill bit 42 drills the hole. A filling port 82 is connected to the water storage cavity 7, and the dust reduction liquid is injected into the water storage cavity 7 through the filling port 82. When the piston 11 moves, a negative pressure is formed on the left side of the water storage cavity 7, and air can be injected through the filling port 82, which facilitates the piston 11 to pressurize the liquid in the water storage cavity 7.

[0032] like Figure 5 and Figure 7As shown, it also includes an n-shaped rod 12, a transverse top plate 13, a second spring 14 and a connecting pipe 15. The end of the frame 1 away from the positioning plate 2 is provided with an n-shaped rod 12 and the transverse top plate 13 is slidably installed through the n-shaped rod 12. The contact between the transverse top plate 13 and the drilling machine handle 41 is provided with an inclined block. The connection part between the n-shaped rod 12 and the transverse top plate 13 is wound with the second spring 14. The initial state of the second spring 14 is as shown in FIG. Figure 5 As shown, at this time, the drilling machine handle 41 squeezes the inclined block at the bottom of the horizontal top plate 13, and the second spring 14 is in a state of compression deformation. The end of the horizontal top plate 13 away from the n-shaped rod 12 is connected to a connecting pipe 15 parallel to the n-shaped rod 12, and the connecting pipe 15 can be slidably inserted into the on-off opening 81 opened on the water pipe 8. A notch is opened on the connecting pipe 15 to match the on-off opening 81 on the water pipe 8 to connect the water pipe 8. When the notch of the connecting pipe 15 cooperates with the on-off opening 81 on the water pipe 8, the water pipe 8 is in a connected state, and the liquid in the water storage cavity 7 can be smoothly transported to the nozzle 9 through the water pipe 8. When the solid part of the connecting pipe 15 is in the on-off opening 81, the connecting pipe 15 blocks the water pipe 8. At this time, the liquid in the water storage cavity 7 cannot be transported to the nozzle 9 through the water pipe 8.

[0033] When the drilling machine handle 41 drives the drilling machine body 4 and the drill bit 42 to move toward the positioning plate 2, the drilling machine handle 41 drives the piston 11 to move toward the positioning plate 2 through the n-type connecting rod 10, thereby pressurizing the liquid in the water storage chamber 7 and transporting it to the water pipe 8, and then transporting it to the nozzle 9 through the water pipe 8, and then spraying it to the drilling position of the drill bit 42 in the wall through the nozzle 9, so as to achieve the function of dust reduction; at the same time, after the drilling machine handle 41 moves away from the inclined block at the bottom of the horizontal top plate 13, the horizontal top plate 13 moves downward under the action of the elastic force of the second spring 14, and the connecting pipe 15 moves downward and connects its opening with the on-off port 81, so that the pipeline of the water pipe 8 is connected. On the contrary, when the drilling machine handle 41 squeezes the inclined block at the bottom of the horizontal top plate 13, the horizontal top plate 13 drives the connecting rod to move upward, and the physical part of the connecting rod blocks the on-off port 81, thereby isolating the water pipe 8 from continuing to transport dust reduction liquid to the nozzle 9.

[0034] like Figure 8As shown, it also includes a collection frame 19, a sliding member 20 and a third spring 21. The collection frame 19 and the sliding member 20 are arranged at the lower part of the frame 1 in the same direction as the drill bit 42. One end of the sliding member 20 is slidably connected to the bottom of the frame 1, and the other end of the sliding member 20 is n-shaped and the two ends of the n-shaped are respectively connected to the positioning plate 2 and the top cover slidably installed on the top of the collection frame 19. When the positioning plate 2 slides along the frame 1, the positioning plate 2 drives the sliding member 20 to move in the direction away from the wall, and the n-shaped section of the sliding member 20 drives the top cover slidably installed on the top of the collection frame 19 to move in the direction away from the collection frame 19, thereby opening the top cover on the top of the mobile phone frame 19. At the same time, the collection frame 19 fits against the wall to realize the function of collecting the debris generated when the drill bit 42 drills a hole. The sliding member 20 is also wound with a third spring 21. When the sliding member 20 moves in the direction away from the wall, the third spring 21 is compressed. Figure 8 The figure shows the initial state of the third spring 21. When the drilling operation is completed, the frame 1 is no longer pushed, the positioning plate 2 no longer slides, the first spring 3 is reset, and the third spring 21 is reset to the position shown in FIG. Figure 8 In the initial state shown, the top of the collecting frame 19 is blocked by the top cover.

[0035] like Figure 8 As shown, it also includes an arc-shaped shock-absorbing plate 22 and a fourth spring 23. The arc-shaped shock-absorbing plate 22 is slidably installed on one end of the frame 1 away from the positioning plate 2. The fourth spring 23 is arranged between the arc-shaped shock-absorbing plate 22 and the frame 1, and the fourth spring 23 is wound around the connecting piece connecting the arc-shaped shock-absorbing plate 22 and the frame 1. Damping is arranged between the arc-shaped shock-absorbing plate 22 and the frame 1. The arc-shaped shock-absorbing plate 22 is made of soft material. The arc-shaped shock-absorbing plate 22 is in contact with the human body. Through the cooperation of the arc-shaped shock-absorbing plate 22 and the fourth spring 23, the function of damping the vibration force generated by the drill bit 42 during drilling operation can be realized.

[0036] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A wall drilling device for construction engineering, comprising a frame (1), a drilling machine handle (41) and a drill bit (42), wherein the drilling machine handle (41) and the drill bit (42) are mounted on a drilling machine body (4), and the drilling machine body (4) is slidably mounted on the frame (1) through the drilling machine handle (41), characterized in that: The machine also comprises a protrusion (101), a positioning plate (2), a first spring (3), a mounting frame (5), a protective baffle (6) and a dust reduction mechanism. The positioning plate (2) is slidably mounted on the end of the frame (1) in the same direction as the drill bit (42). The first spring (3) is arranged between the positioning plate (2) and the protrusion (101). The mounting frame (5) is arranged on the symmetrical inner wall of the frame (1) close to the positioning plate (2). The protective baffle (6) is slidably arranged between the mounting frames (5). The drill bit (42) passes through the protective baffle (6) to perform a drilling operation. The dust generated by the drill bit (42) during the drilling operation is sprayed and dusted by the dust reduction mechanism installed on the frame (1).

2. A wall drilling device for construction engineering according to claim 1, characterized in that: The dust suppression mechanism comprises a water storage cavity (7), a water delivery pipe (8), a nozzle (9), an N-type connecting rod (10) and a piston (11). The water storage cavity (7) is installed on the upper part of the frame (1). The piston (11) is movably arranged in the water storage cavity (7). The piston (11) is connected to the drilling machine handle (41) via the N-type connecting rod (10). One end of the water storage cavity (7) facing the positioning plate (2) is connected to the water delivery pipe (8). The end of the water delivery pipe (8) is connected to the nozzle (9). The nozzle (9) is arranged above the drill bit (42). When the drilling machine handle (41) slides, the piston (11) is driven by the N-type connecting rod (10) to slide along the inner wall of the water storage cavity (7) so that the liquid in the water storage cavity (7) is pressurized and delivered to the nozzle (9) through the water delivery pipe (8).

3. A wall drilling device for construction engineering according to claim 2, characterized in that: The invention also comprises an n-shaped rod (12), a transverse top plate (13), a second spring (14) and a connecting pipe (15); the n-shaped rod (12) is arranged at one end of the frame (1) away from the positioning plate (2), and the transverse top plate (13) is slidably mounted via the n-shaped rod (12); the second spring (14) is wound around the connecting portion between the n-shaped rod (12) and the transverse top plate (13); the connecting pipe (15) parallel to the n-shaped rod (12) is connected to one end of the transverse top plate (13) away from the n-shaped rod (12); the connecting pipe (15) can be slidably inserted into a switch opening (81) provided on the water pipe (8); and a slope block is arranged at the contact portion between the transverse top plate (13) and the drilling machine handle (41).

4. A wall drilling device for construction engineering according to claim 3, characterized in that: The connecting pipe (15) is provided with a notch which matches the on-off opening (81) on the water pipe (8) to connect the water pipe (8).

5. A wall drilling device for construction engineering according to claim 1, characterized in that: It also includes a driving assembly for driving the protective baffle (6) to fit against the wall, the driving assembly comprising a first rack (16) fixedly connected to the upper portion of the positioning plate (2), a second rack (17) connected to the side of the protective baffle (6) facing away from the drill bit (42), and a gear (18) meshing with both the first rack (16) and the second rack (17).

6. A wall drilling device for construction engineering according to claim 5, characterized in that: The movement directions of the first rack (16) and the second rack (17) are opposite.

7. A wall drilling device for construction engineering according to claim 6, characterized in that: The length of the second rack (17) is less than or equal to the distance that the protective baffle (6) can move along the mounting frame (5).

8. A wall drilling device for construction engineering according to claim 1, characterized in that: The machine frame (19) further comprises a collecting frame (19), a sliding member (20) and a third spring (21). The collecting frame (19) and the sliding member (20) are arranged at the lower part of the frame (1) in the same direction as the drill bit (42). One end of the sliding member (20) is slidably connected to the bottom of the frame (1). The other end of the sliding member (20) is arranged in an n-type configuration and the two ends of the n-type configuration are respectively connected to the positioning plate (2) and a top cover slidably mounted on the top of the collecting frame (19). When the positioning plate (2) slides along the frame (1), the top cover on the top of the collecting frame (19) is driven to move in a direction away from the collecting frame (19) and open through the n-type section of the sliding member (20). The sliding member (20) is also wound with the third spring (21).

9. A wall drilling device for construction engineering according to claim 1, characterized in that: It also includes an arc-shaped shock-absorbing plate (22) and a fourth spring (23); the arc-shaped shock-absorbing plate (22) is slidably mounted on one end of the frame (1) away from the positioning plate (2); the fourth spring (23) is arranged between the arc-shaped shock-absorbing plate (22) and the frame (1); and the fourth spring (23) is wound around a connecting piece connecting the arc-shaped shock-absorbing plate (22) and the frame (1).

10. A wall drilling device for construction engineering according to claim 2, characterized in that: The water storage cavity (7) is provided with an observation window for conveniently observing the liquid level therein.

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