Building door frame pouring air permeability detection equipment

Abstract

The invention discloses building door frame pouring air permeability detection equipment, and relates to the technical field of building construction quality detection.The building door frame pouring air permeability detection equipment comprises a walking base and a door frame body installed in a building wall, a detection hole is formed in the building wall, and the top of the walking base is connected with an air permeability detection mechanism through a height adjusting mechanism; the air permeability detection mechanism comprises an air permeability detection pipe, a sealing assembly, an air pressure sensor installed on the air permeability detection pipe, a dust filtering type air supply assembly and a sealing pressing assembly, and the end of the air permeability detection pipe is inserted into the detection hole. According to the air permeability detection device, when air permeability detection is carried out, the air permeability detection pipe is inserted into the detection hole, and the detection hole is sealed by adopting the external rubber sealing sleeve, so that the accuracy of air permeability detection is ensured; the situation that the sealing assembly is loosened due to air pressure fluctuation in the ventilation detection process can be avoided, and the sealing stability of the sealing assembly is effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of building construction quality testing technology, and in particular to a device for testing the air permeability of cast-in-place building door frames. Background Technology

[0002] In building construction, there are usually gaps at the connection between the door frame and the concrete wall. These gaps are typically sealed by pouring concrete. The quality of this pouring directly affects the sealing, sound insulation, and structural durability of the subsequent door frame installation.

[0003] Currently, after the door frame is poured, it is generally necessary to use ventilation testing equipment to test its sealing performance. In actual operation, a test hole is opened in the building wall, and air is circulated into the test hole through a pipe to test the air pressure in the pipe. If the air pressure increases continuously, it means that the door frame has good sealing performance after pouring and the pouring quality is qualified and meets the standards. Conversely, if the air pressure is stable and normal, it means that the door frame has poor sealing performance after pouring and the pouring quality is unqualified and does not meet the standards.

[0004] However, existing ventilation testing equipment does not allow for a stable seal between the testing pipe and the testing hole, which makes it difficult to guarantee the accuracy of ventilation testing. Furthermore, during the air supply testing process, the increased airflow speed may bring external dust into the testing pipe, which could affect the accuracy of the sensors installed inside the testing pipe. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device for testing the air permeability of cast-in-place building door frames, effectively solving the problems raised in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A ventilation testing device for a building door frame includes a walking base and a door frame body installed in the building wall. The building wall has a testing hole, and the top of the walking base is connected to a ventilation testing mechanism through a height adjustment mechanism. The ventilation detection mechanism includes a ventilation detection tube, a sealing assembly, a pressure sensor installed on the ventilation detection tube, a dust-filtering air supply assembly, and a sealing and pressing assembly, with the end of the ventilation detection tube inserted into the detection hole. The sealing assembly includes a connector and a rubber sealing sleeve that are sequentially sleeved on the outer wall of the ventilation detection tube. The connector and the rubber sealing sleeve are fixedly connected to each other, and the rubber sealing sleeve is sealed to the detection hole. The dust-filtering air supply assembly includes a driver housing, an air supply hood fixedly connected to the bottom of the housing, an inspection cover plate fixedly connected to the outer wall of the top of the housing, a drive shaft rotatably installed at the center of the inspection cover plate, an air supply fan blade fixedly mounted on the drive shaft, and a fan-shaped filter screen fixedly embedded in the inspection cover plate, and the connection end of the air passage detection pipe is fixedly connected to the bottom of the air supply hood.

[0007] As a preferred technical solution of the present invention, the driver includes a drive motor fixedly installed on the rear outer wall of the housing, a first bevel gear fixedly mounted on the output shaft of the drive motor, and a second bevel gear fixedly mounted on the bottom end of the transmission shaft.

[0008] As a preferred technical solution of the present invention, the output shaft of the drive motor passes through the rear side of the housing, and the first bevel gear and the second bevel gear mesh with each other and are both located inside the housing.

[0009] As a preferred technical solution of the present invention, the top of the inspection cover is provided with a fan-shaped dust collection groove, and a brush rod is fixedly mounted on the top of the drive shaft, with the bristles at the bottom of the brush rod in contact with the top surface of the fan-shaped filter screen.

[0010] As a preferred technical solution of the present invention, two positioning holes are symmetrically opened on the inner arc wall of the connector, and two positioning beads are movably embedded in the outer wall of the ventilation detection tube. Both positioning beads are press-fit ball plungers, and the two positioning beads are respectively engaged in the two positioning holes.

[0011] As a preferred technical solution of the present invention, the sealing and pressing assembly includes two fixing ears symmetrically fixed on the outer wall of the ventilation detection tube, pressing screws threadedly connected to the two fixing ears in sequence, two pressing discs welded to the outer wall of one end of the two pressing screws in sequence, and two rotating caps fixed to the outer wall of the other end of the two pressing screws in sequence, and both pressing discs are pressed against the connecting member.

[0012] As a preferred technical solution of the present invention, the height adjustment mechanism includes a vertical guide rail frame welded to the top outer wall of the walking seat, two bearing seats symmetrically fixed to one side of the outer wall of the vertical guide rail frame, a lead screw rotatably mounted on the two bearing seats, an adjustment seat threadedly connected to the lead screw, a stepper motor fixedly connected to the top outer wall of the vertical guide rail frame via a motor bracket, and an infrared ranging sensor fixedly mounted on the bottom outer wall of the adjustment seat.

[0013] As a preferred technical solution of the present invention, the output shaft of the stepper motor is coaxially and fixedly connected to the top end of the lead screw through a coupling, the adjusting seat is slidably connected to the vertical guide rail frame, and the end of the vertical guide rail frame is fixedly connected to the outer wall of the ventilation detection tube.

[0014] As a preferred technical solution of the present invention, the four corners of the bottom of the walking seat are fixedly installed with universal wheels with brakes, and a controller is fixedly installed on the front outer wall of the box.

[0015] The beneficial effects of this invention are as follows: 1. When performing ventilation testing, this invention inserts the ventilation test tube into the test hole and seals the test hole with an external rubber sealing sleeve to ensure the accuracy of the ventilation test. Furthermore, the sealing and pressing effect of the sealing and pressing component can prevent the sealing component from loosening due to air pressure fluctuations during the ventilation test, thus effectively ensuring the sealing stability of the sealing component. 2. When performing ventilation testing, the present invention drives the air supply fan blades to rotate to introduce outside air into the chamber and deliver it into the ventilation detection tube through the air supply hood. During this process, the outside air is filtered by the fan-shaped filter screen as it enters the chamber, thereby avoiding the situation where the surrounding air circulation speed is increased during ventilation and the outside dust is easily brought into the detection tube, thus avoiding the impact of dust on the detection accuracy of the air pressure sensor. 3. During the air supply process, the drive shaft rotates and drives the brush rod to rotate along the surface of the fan-shaped filter screen, which facilitates the online cleaning of dust adhering to the surface of the fan-shaped filter screen. This effectively ensures the permeability of the fan-shaped filter screen surface, reduces the frequency of downtime for maintenance and cleaning, and the cleaned dust is also swept into the fan-shaped dust collection trough for collection. 4. When the sealing assembly of the present invention is installed, the cooperation between the two positioning slots on the connector and the two positioning beads on the outer wall of the venting detection tube achieves the effect of quick assembly and disassembly of the sealing assembly and the venting detection tube, thereby facilitating the flexible replacement of sealing assemblies of different specifications to match the size of the detection hole. 5. The present invention is equipped with a height adjustment mechanism, which allows the ventilation detection tube to be accurately moved to the required detection height, making it easy to flexibly adapt to the detection needs of detection holes with different opening heights. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention in its working state; Figure 2 This is a side view of the structure of the present invention in its working state; Figure 3 This is a three-dimensional structural diagram of the detection hole of the present invention on a building wall; Figure 4 This is a three-dimensional enlarged structural diagram of the connection between the ventilation detection tube and the sealing assembly of the present invention; Figure 5 This is a three-dimensional enlarged structural schematic diagram of the dust-filtering air delivery component of the present invention; Figure 6 This is a cross-sectional view of the housing of the present invention; Figure 7 This is a three-dimensional exploded view of the dust-filtering air delivery component of the present invention; Figure 8 This is a three-dimensional enlarged structural diagram of the connection between the adjustment seat and the infrared ranging sensor of the present invention; Figure 9 This is a three-dimensional enlarged structural schematic diagram of the sealing assembly of the present invention; Figure 10 This is a side view of the sealing and pressing assembly of the present invention.

[0018] In the diagram: 1. Building wall; 2. Door frame; 3. Detection hole; 4. Walking seat; 5. Ventilation detection pipe; 6. Connector; 7. Rubber sealing sleeve; 8. Air pressure sensor; 9. Box; 10. Air supply hood; 11. Inspection cover; 12. Drive shaft; 13. Air supply fan blade; 14. Fan-shaped filter screen; 15. Brush rod; 16. Fan-shaped dust collection trough; 17. Drive motor; 18. First bevel gear; 19. Second bevel gear; 20. Positioning hole slot; 21. Positioning bead; 22. Fixing ear; 23. Clamping screw; 24. Clamping plate; 25. Rotary cap; 26. Vertical guide rail frame; 27. Bearing seat; 28. Lead screw; 29. ​​Adjusting seat; 30. Stepper motor; 31. Infrared ranging sensor; 32. Controller; 33. Motor bracket. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1, referring to Figure 1-8 A testing device for the ventilation of a building door frame includes a walking seat 4 and a door frame 2 installed in the building wall 1. The four corners of the bottom of the walking seat 4 are fixedly equipped with casters with brakes to facilitate the movement of the testing device. In this embodiment, a detection hole 3 is provided on the building wall 1, and a ventilation detection mechanism is connected to the top of the walking seat 4 through a height adjustment mechanism. The ventilation detection mechanism includes a ventilation detection pipe 5, a sealing component, a pressure sensor 8 installed on the ventilation detection pipe 5, a dust-filtering air supply component, and a sealing and pressing component. The end of the ventilation detection pipe 5 is inserted into the detection hole 3. Furthermore, the sealing assembly includes a connector 6 and a rubber sealing sleeve 7 that are sequentially sleeved on the outer wall of the ventilation detection tube 5. The connector 6 and the rubber sealing sleeve 7 are fixedly connected to each other, and the rubber sealing sleeve 7 is sealed to the detection hole 3. Furthermore, the dust-filtering air supply assembly includes a driver housing 9, an air supply hood 10 fixedly connected to the bottom of the housing 9, a maintenance cover 11 fixedly connected to the top outer wall of the housing 9, a drive shaft 12 rotatably mounted at the center of the maintenance cover 11, an air supply fan blade 13 fixedly mounted on the drive shaft 12, and a fan-shaped filter screen 14 fixedly embedded in the maintenance cover 11. The connection end of the ventilation detection pipe 5 is fixedly connected to the bottom of the air supply hood 10, and a controller 32 is fixedly mounted on the front outer wall of the housing 9. Furthermore, the drive includes a drive motor 17 fixedly mounted on the rear outer wall of the housing 9, a first bevel gear 18 fixedly mounted on the output shaft of the drive motor 17, and a second bevel gear 19 fixedly mounted on the bottom end of the transmission shaft 12. The output shaft of the drive motor 17 passes through the rear side of the housing 9, and the first bevel gear 18 and the second bevel gear 19 mesh with each other and are both located inside the housing 9. Furthermore, a fan-shaped dust collection trough 16 is provided on the top of the inspection cover plate 11, and a brush rod 15 is fixedly mounted on the top of the drive shaft 12. The brush bristles at the bottom of the brush rod 15 are in contact with the top surface of the fan-shaped filter screen 14. The air pressure sensor 8 and the drive motor 17 are both electrically connected to the controller 32. In this embodiment, when it is necessary to test the sealing performance of the door frame after the casting process, a test hole 3 is pre-drilled in the building wall 1, and then the ventilation test pipe 5 is inserted into the test hole 3 and the test hole 3 is sealed with an external rubber sealing sleeve 7 to ensure the accuracy of the ventilation test. Secondly, the drive motor 17 drives the first bevel gear 18 to rotate, and then the second bevel gear 19, which meshes with the first bevel gear 18, drives the air supply fan blade 13 on the transmission shaft 12 to rotate, so as to introduce outside air into the box 9 and deliver it into the ventilation detection pipe 5 through the air supply cover 10. Then the delivered air will continuously enter the building wall 1 from the detection hole 3. At this time, the air pressure sensor 8 will detect the air pressure in the ventilation detection pipe 5 in real time. If the air pressure continues to increase, it means that there is no air flow gap between the door frame 2 and the building wall 1, which means that the door frame has good sealing performance after pouring and the pouring quality is qualified and meets the standards. Conversely, if the air pressure is stable and normal, it means that there is an air flow gap between the door frame 2 and the building wall 1, which means that the door frame has poor sealing performance after pouring and the pouring quality is unqualified and does not meet the standards. In this way, the detection efficiency is effectively improved. Finally, as outside air enters the housing 9, it is filtered by the fan-shaped filter 14. This prevents dust from being easily brought into the detection tube due to the increased airflow speed during ventilation, thus avoiding the impact of dust on the detection accuracy of the pressure sensor 8. Furthermore, as the drive shaft 12 rotates, it also drives the brush rod 15 to rotate along the surface of the fan-shaped filter 14, facilitating online cleaning of the dust adhering to the surface of the fan-shaped filter 14. This effectively ensures the permeability of the surface of the fan-shaped filter 14 and reduces the frequency of downtime for maintenance and cleaning. The cleaned dust is also swept into the fan-shaped dust collection trough 16 for collection.

[0021] Example 2, refer to Figure 4 , Figure 9 and Figure 10 This embodiment is an optimization based on embodiment 1. Specifically, two positioning slots 20 are symmetrically opened on the inner arc of the connector 6. Two positioning beads 21 are movably embedded in the outer wall of the ventilation detection tube 5. Both positioning beads 21 are press-fit ball plungers. The two positioning beads 21 are respectively engaged in the two positioning slots 20. More specifically, the sealing and clamping assembly includes two fixing ears 22 symmetrically fixed on the outer wall of the ventilation detection tube 5, clamping screws 23 sequentially threaded onto the two fixing ears 22, two clamping discs 24 sequentially welded to the outer wall of one end of the two clamping screws 23, and two rotating caps 25 sequentially fixed to the outer wall of the other end of the two clamping screws 23. Both clamping discs 24 are clamped onto the connector 6. In this embodiment, during installation, the sealing assembly is quickly assembled and disassembled by the two positioning slots 20 on the connector 6 and the two positioning beads 21 on the outer wall of the ventilation detection tube 5. This allows for flexible replacement of sealing assemblies of different specifications to match the size of the detection hole 3. Secondly, after the rubber sealing sleeve 7 seals the detection hole 3, the two clamping screws 23 can be rotated sequentially using the two rotating caps 25 to rotate and advance the two clamping discs 24, thus clamping the connector 6. This prevents the sealing assembly from loosening due to air pressure fluctuations during ventilation testing, effectively ensuring the sealing stability of the sealing assembly and thus contributing to the accuracy of the entire testing equipment.

[0022] Example 3, referring to Figure 1 and Figure 2 This embodiment is an optimization based on embodiment 1. Specifically, the height adjustment mechanism includes a vertical guide rail frame 26 welded to the top outer wall of the walking seat 4, two bearing seats 27 symmetrically fixed to one side outer wall of the vertical guide rail frame 26, a lead screw 28 rotatably mounted on the two bearing seats 27, an adjustment seat 29 threadedly connected to the lead screw 28, a stepper motor 30 fixedly connected to the top outer wall of the vertical guide rail frame 26 via a motor bracket 33, and an infrared ranging sensor 31 fixedly mounted on the bottom outer wall of the adjustment seat 29. Furthermore, the output shaft of the stepper motor 30 is coaxially and fixedly connected to the top end of the lead screw 28 via a coupling, the adjusting seat 29 is slidably connected to the vertical guide rail frame 26, the end of the vertical guide rail frame 26 is fixedly connected to the outer wall of the ventilation detection tube 5, and both the infrared ranging sensor 31 and the stepper motor 30 are electrically connected to the controller 32. In this embodiment, after measuring the opening height of the detection hole 3, the value can be set on the controller 32. Then, the stepper motor 30 drives the lead screw 28 to rotate. Under the guidance and limit of the vertical guide rail frame 26, the adjusting seat 29 threadedly connected to the lead screw 28 will move upward. At this time, the infrared distance sensor 31 detects the displacement distance in real time. When the required height is reached, the controller 32 will control the stepper motor 30 to stop running. In this way, the ventilation detection tube 5 can be accurately displaced to the required detection height, which is convenient for flexibly adapting to the detection requirements of detection holes 3 with different opening heights.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the ventilation properties of a cast-in-place building door frame, comprising a walking base (4) and a door frame body (2) installed within a building wall (1), wherein the building wall (1) has a testing hole (3), characterized in that, The top of the walking seat (4) is connected to a ventilation detection mechanism via a height adjustment mechanism; The ventilation detection mechanism includes a ventilation detection tube (5), a sealing assembly, a pressure sensor (8) installed on the ventilation detection tube (5), a dust-filtering air supply assembly, and a sealing and pressing assembly, and the end of the ventilation detection tube (5) is inserted into the detection hole (3). The sealing assembly includes a connector (6) and a rubber sealing sleeve (7) that are sequentially sleeved on the outer wall of the ventilation detection tube (5). The connector (6) and the rubber sealing sleeve (7) are fixedly connected to each other, and the rubber sealing sleeve (7) is sealed to the detection hole (3). The dust-filtering air supply assembly includes a driver housing (9), an air supply hood (10) fixedly connected to the bottom of the housing (9), an inspection cover (11) fixedly connected to the top outer wall of the housing (9), a drive shaft (12) rotatably installed at the center of the inspection cover (11), an air supply fan blade (13) fixedly mounted on the drive shaft (12), and a fan-shaped filter screen (14) fixedly embedded in the inspection cover (11), and the connection end of the ventilation detection pipe (5) is fixedly connected to the bottom of the air supply hood (10).

2. The air permeability testing device for cast-in-place building door frames according to claim 1, characterized in that, The driver includes a drive motor (17) fixedly installed on the rear outer wall of the housing (9), a first bevel gear (18) fixedly mounted on the output shaft of the drive motor (17), and a second bevel gear (19) fixedly mounted on the bottom end of the transmission shaft (12).

3. The air permeability testing equipment for cast-in-place building door frames according to claim 2, characterized in that, The output shaft of the drive motor (17) passes through the rear side of the housing (9), and the first bevel gear (18) and the second bevel gear (19) mesh with each other and are both located inside the housing (9).

4. The air permeability testing equipment for cast-in-place building door frames according to claim 1, characterized in that, The top of the inspection cover (11) is provided with a fan-shaped dust collection groove (16), and the top of the drive shaft (12) is fixedly fitted with a brush rod (15), and the brush bristles at the bottom of the brush rod (15) are in contact with the top surface of the fan-shaped filter screen (14).

5. The air permeability testing equipment for cast-in-place building door frames according to claim 1, characterized in that, Two positioning slots (20) are symmetrically opened on the inner arc wall of the connector (6). Two positioning beads (21) are movably embedded in the outer wall of the ventilation detection tube (5). Both positioning beads (21) are press-fit ball plungers, and the two positioning beads (21) are respectively engaged in the two positioning slots (20).

6. The air permeability testing device for cast-in-place building door frames according to claim 1, characterized in that, The sealing and pressing assembly includes two fixing ears (22) symmetrically fixed on the outer wall of the ventilation detection tube (5), pressing screws (23) threadedly connected to the two fixing ears (22) in sequence, two pressing discs (24) welded to the outer wall of one end of the two pressing screws (23) in sequence, and two rotating caps (25) fixed to the outer wall of the other end of the two pressing screws (23) in sequence, and both pressing discs (24) are pressed onto the connector (6).

7. The air permeability testing device for cast-in-place building door frames according to claim 1, characterized in that, The height adjustment mechanism includes a vertical guide rail frame (26) welded to the top outer wall of the walking seat (4), two bearing seats (27) symmetrically fixed to one side outer wall of the vertical guide rail frame (26), a lead screw (28) rotatably mounted on the two bearing seats (27), an adjustment seat (29) threadedly connected to the lead screw (28), a stepper motor (30) fixedly connected to the top outer wall of the vertical guide rail frame (26) via a motor bracket (33), and an infrared ranging sensor (31) fixedly mounted on the bottom outer wall of the adjustment seat (29).

8. The air permeability testing device for cast-in-place building door frames according to claim 7, characterized in that, The output shaft of the stepper motor (30) is coaxially and fixedly connected to the top of the lead screw (28) through a coupling. The adjusting seat (29) is slidably connected to the vertical guide rail frame (26), and the end of the vertical guide rail frame (26) is fixedly connected to the outer wall of the ventilation detection tube (5).

9. The air permeability testing device for cast-in-place building door frames according to claim 1, characterized in that, The four corners of the bottom of the walking seat (4) are all fixedly installed with universal wheels with brakes, and the controller (32) is fixedly installed on the front outer wall of the box (9).

Images