Construction method for preventing flood from flowing backwards at wire and cable access of basement

Abstract

The invention discloses a construction method for preventing flood from flowing backwards at a basement wire and cable access position, and relates to the technical field of indoor strong and weak current construction. According to the design requirements of the drawing, counting weak electric wires going to enter and exit from the basement, and sleeving rubber sleeves; the rubber sleeve is filled with waterproof ointment to form a closed weak current cable bundle; before the concrete outer wall is poured, the galvanized steel sleeve is installed on the weak current cable bundle; after pouring, a rubber sleeve is arranged on the inner side of the concrete outer wall along the galvanized steel sleeve, and a stainless steel annular pressing strip is installed; a waterproof insulating tape is wound on the exposed weak current cable bundle in the end part of the rubber sleeve, the thickness outer diameter of the waterproof insulating tape reaches the inner diameter of the rubber sleeve, and then the waterproof insulating tape is hooped by a stainless steel bundle hose clamp; a water level floating ball power switch control system is installed in the outdoor wire and cable operation well; the inner side of the concrete outer wall is provided with a pressure automatic pressurization inflator pump, so that the technical problems of gaps and falling after long-term use of the sealing plug at the basement wire and cable inlet and outlet are solved.

Description

Technical Field

[0001] The invention relates to the technical field of indoor strong and weak electricity construction quality, and in particular to a construction method for preventing flood backflow at the entrance and exit of basement electric wires and cables. Background Art

[0002] In order to meet the needs of people in residential areas for travel and living environment, basements are set up during planning and design to separate people and vehicles for easy management. However, in areas with abundant and concentrated rainfall, the entrances and exits of strong and weak wires in and out of the basement often cause rainwater to pass through pipes and directly enter the basement due to factors such as thermal expansion and contraction.

[0003] The conventional practice for sealing the entrances and exits of the strong and weak wires in and out of the basement is to pass the strong and weak wires directly through the reserved holes, and then seal them with waterproof ointment or leak-proof king. However, after several spring, summer, autumn and winter, the thermal expansion and contraction caused by this method will directly lead to gaps in the seal or even falling off. Then, it is necessary to seal it manually, which wastes manpower and material resources, and only treats the symptoms but not the root cause. If the community managers are not careful, there will often be a risk of flooding in the basement due to the huge amount of rain in the rainy season.

[0004] To this end, we provide a construction method for preventing flood backflow at the entrance and exit of basement wires and cables to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the existing technology and provide a construction method for flood prevention at the entrance and exit of basement wires and cables to solve the technical problems of gaps and falling off caused by long-term use of the sealing plugging at the entrance and exit of basement wires and cables. The following technical solutions are specifically provided:

[0006] A construction method for preventing flood backflow at the entrance and exit of basement wires and cables, comprising the following steps:

[0007] Step 1: According to the design requirements of the drawings, count the weak wires that are planned to enter and exit the basement, and put on appropriate rubber sleeves;

[0008] Inject waterproof ointment into the rubber sleeve to fill the gaps between weak-current wires to form a closed weak-current cable bundle;

[0009] Step 2: According to the design requirements of the drawings, process the galvanized steel casing with a length equal to the thickness of the basement concrete outer wall and a diameter greater than the outer diameter of the weak current cable harness;

[0010] Process a set of 10mm thick circular steel plates, the inner diameter of which is the outer diameter of the galvanized steel casing;

[0011] The outer diameter of the 10mm thick circular steel plate is 200mm larger than the outer diameter of the galvanized steel casing. A set of 10mm thick and 50mm wide strip steel plates are processed and wrapped around the edge of the circular steel plate and welded.

[0012] Then put the circular steel plate in the middle of the galvanized steel casing and weld it to make a steel plate folding water stop ring;

[0013] The steel plate folding water stop ring requires the weld to be full, no water seepage, and painted with anti-rust paint;

[0014] Step 3: Customize and purchase rubber sleeves of appropriate diameter, with a length of not less than 600 mm, and put one end of a set of rubber sleeves on the galvanized steel sleeve, and place it on one side of the folded edge of the steel plate folded edge water stop ring, and install the stainless steel hose clamp;

[0015] Step 4: Before pouring the concrete exterior wall, install the processed galvanized steel casing at the position designed in the drawing. After pouring the concrete exterior wall, install the stainless steel annular pressure strip along the galvanized steel casing rubber casing on the inner side of the concrete exterior wall and firmly attach it to the concrete exterior wall;

[0016] Step 5: After the weak current cable harness is installed, wrap waterproof insulating tape around the weak current cable harness inside the exposed end of the rubber casing. The outer diameter of the tape should reach the inner diameter of the rubber casing, and then tighten it with a stainless steel hose clamp.

[0017] Step 6: Install the water level float power switch control system in the outdoor wire and cable operation well;

[0018] An automatic pressure-increasing air pump is installed on the inner side of the concrete outer wall and connected to the water level float power switch control system in the outdoor wire and cable operation well;

[0019] Step 7: Place a high-strength, high-tension annular air bag between the galvanized steel casing and the weak-current cable bundle;

[0020] When the flood in the wire and cable operation well rises to the warning height, the pressure-increasing air pump is automatically started to fill the galvanized steel pipe tightly to prevent flood backflow.

[0021] In a further technical solution, in step two, the steel plate folded edge water stop ring is installed in the middle of the galvanized steel casing, and the strip steel plate is located where the circular steel plate faces the outdoor wire and cable operation well.

[0022] In a further technical solution, the bottom of the pressure automatic pressurizing air pump is provided with an output end, and is connected to a gas pipeline, and the gas pipeline extends to the rubber sleeve;

[0023] A rubber sleeve located on the inner side of the concrete outer wall is provided with an annular portion on one side opposite to the steel plate folding water stop ring, and a connection notch is preset on the annular portion, and the connection notch is suitable for the gas pipeline to pass through;

[0024] An air inlet is installed on the top of the high-strength and high-tension annular inflatable bag, and the air inlet is connected to the air transmission pipeline.

[0025] In a further technical solution, two sets of stainless steel throat clamps located outside the concrete exterior wall are each installed with three, and the installation and tightening parts are staggered.

[0026] In a further technical solution, a side branch pipe is installed outside the gas transmission pipeline, and an exhaust valve is installed at the side branch pipe.

[0027] In a further technical solution, an extrusion piece is installed between the waterproof insulating tape ring and the high-strength and high-tension annular inflatable bag; the extrusion piece includes a ring plate 1 and a ring plate 2, a support piece and a travel switch are installed between the ring plate 1 and the ring plate 2, the travel switch is installed on the ring plate 1, and the output end includes a touch rod, and the touch rod is arranged toward the ring plate 2;

[0028] The support member is suitable for adjusting the distance between the ring plate 1 and the ring plate 2. In a further technical solution, the support member includes a transverse spring, and one end of the transverse spring is fixedly connected to the ring plate 1, and the other end is fixedly connected to the ring plate 2; a telescopic guide rod is installed in the middle of the transverse spring;

[0029] The telescopic guide rod comprises a large diameter tube and a small diameter tube. A connecting hole is provided in the large diameter tube and is suitable for the small diameter tube to pass through. A retaining ring is installed in the connecting hole and is used to restrict the small diameter tube.

[0030] The large diameter pipe is fixedly connected to the ring plate at one phase, and the small diameter pipe is fixedly connected to the ring plate at two phases.

[0031] In a further technical solution, an initial position is set, and a gap is reserved between the touch rod and the second ring plate; after the pressure automatic pressurizing air pump is filled with a high-strength and high-tension annular air bag, the second ring plate is mortgaged to move toward the first ring plate, and then abuts against and drives the trigger touch rod, which bends; an electromagnetic control valve is provided on the pressure automatic pressurizing air pump, and the travel switch is electrically connected to the electromagnetic control valve to control the stopping of pumping air; after completion, a sealing and flood prevention effect is formed.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention changes the installation process of wires and cables entering and exiting the basement, adopts a single high-voltage wire and cable and a bundle of weak-current cables to enter and exit, and uses a rigid and flexible method to block from the source, eliminating the occurrence of gaps and falling off at the blocking point due to thermal expansion and contraction due to seasonal changes. The automatic pressurized filling method between the wires and cables and the casing can ensure that there is no water seepage or leakage at the wire and cable entrance and exit for a long time, greatly reducing the capital cost of repeated blocking due to rainwater backflow during later use. It is convenient and fast during construction and saves costs significantly after use. The present invention sets a travel switch between the ring plate one and the ring plate two, and realizes the opening of the electromagnetic control valve through the float of the water level float power switch control system; the ring plate two is driven to move toward the ring plate one through the inflation and extrusion of the lateral high-strength and high-tension annular inflatable bag, and the extrusion touch rod is used to transmit the signal change to the travel switch, so that the electromagnetic control valve is closed, and the automatic pump gas closure is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The cross-sectional view of the structure for preventing flood backflow at the entrance and exit of the basement wires and cables of the present invention Figure 1 ;

[0035] Figure 2 It is a schematic diagram of the side installation of the steel plate folding water stop ring of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the steel plate folding water stop ring of the present invention;

[0037] Figure 4 It is a schematic diagram of the weak current cable harness of the present invention;

[0038] Figure 5 The cross-sectional view of the structure for preventing flood backflow at the entrance and exit of the basement wires and cables of the present invention Figure 2 ;

[0039] Figure 6 for Figure 5 A magnified view of part A;

[0040] Figure 7 for Figure 5 A magnified view of part B;

[0041] Figure 8 Schematic diagram of the annular portion of the present invention.

[0042] In the figure: 1. Concrete exterior wall; 2. Galvanized steel casing; 3. Steel plate folded water stop ring; 4. Rubber casing; 5. Stainless steel hose clamp; 6. Weak-current cable harness; 7. High-strength and high-tension annular air bag; 8. Waterproof insulating tape ring; 9. Stainless steel annular pressure strip; 10. Pressure automatic pressurized air pump; 11. Wire and cable operation well; 12. Water level float power switch control system; 13. Circular steel plate; 14. Strip steel plate; 15. Weak-current wire; 16. Gas pipeline; 17. Ring part; 18. Connection notch; 19. Air inlet; 20. Ring plate one; 21. Ring plate two; 22. Travel switch; 23. Touch rod; 24. Transverse spring; 25. Large diameter pipe; 26. Small diameter pipe; 27. Retaining ring; 28. Exhaust valve; 29. ​​Solenoid control valve. DETAILED DESCRIPTION

[0043] 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.

[0044] Example 1

[0045] See also Figure 1-4 , the present invention provides a technical solution, a construction method for preventing flood backflow at the entrance and exit of basement wires and cables, comprising the following steps:

[0046] Step 1: According to the design requirements of the drawings, count the weak wires 15 that are intended to enter and exit the basement, and put on appropriate rubber sleeves 4;

[0047] Inject waterproof ointment into the rubber sleeve 4 to fill the gaps between the weak-current wires 15 to form a closed weak-current cable bundle 6;

[0048] Step 2: According to the design requirements of the drawings, process the galvanized steel casing 2, the length of which is the same as the thickness of the basement concrete outer wall 1 and the diameter of which is larger than the outer diameter of the weak current cable harness 6;

[0049] Processing a set of 10mm thick circular steel plates 13, the inner diameter of the 10mm thick circular steel plates 13 is the outer diameter of the galvanized steel casing 2;

[0050] The outer diameter of the 10mm thick circular steel plate 13 is 200mm larger than the outer diameter of the galvanized steel casing 2. A set of 10mm thick and 50mm wide strip steel plates 14 are processed, and the strip steel plates 14 are wrapped around the edge of the circular steel plate 13 and welded;

[0051] Then, the annular steel plate 13 is placed in the middle of the galvanized steel casing 2 and welded to form a steel plate folding water stop ring 3;

[0052] The steel plate folding water stop ring 3 requires the weld to be full, must achieve no water seepage, and be painted with anti-rust paint;

[0053] Step 3: Customize and purchase a rubber sleeve 4 of appropriate diameter, with a length of not less than 600 mm, and put one end of a set of rubber sleeves 4 on the galvanized steel sleeve 2, and on one side of the folded edge of the steel plate folded edge water stop ring 3, and install the stainless steel hose clamp 5;

[0054] Step 4: Before pouring the concrete outer wall 1, install the processed galvanized steel casing 2 at the position designed in the drawing. After pouring the concrete outer wall 1, install the stainless steel annular pressure strip 9 along the galvanized steel casing 2 and rubber casing 4 on the inner side of the concrete outer wall 1 and firmly fix it on the concrete outer wall 1;

[0055] Step 5: After the weak current cable bundle 6 is installed, a waterproof insulating tape is wound around the weak current cable bundle 6 in the exposed end of the rubber sleeve 4, with the outer diameter of the wound thickness reaching the inner diameter of the rubber sleeve 4, and then the stainless steel hose clamp 5 is used to tighten the tape;

[0056] Step 6: Install the water level float power switch control system 12 in the outdoor wire and cable operation well 11;

[0057] An automatic pressure-increasing air pump 10 is installed inside the concrete outer wall 1 and is connected to a water level float power switch control system 12 in an outdoor electric wire and cable operation well 11;

[0058] Step 7: Place a high-strength and high-tension annular inflatable bag 7 between the galvanized steel casing 2 and the weak-current cable harness 6;

[0059] When the flood in the wire and cable operation well 11 rises to the warning height, the pressure automatic pressurizing air pump 10 is automatically started to fill the galvanized steel pipe tightly to prevent the flood from flowing back.

[0060] A large number of low-voltage cables are bundled together and enter the basement, while high-voltage wires and cables enter the basement individually. A rubber casing is added to the outer water-stop steel casing pre-buried on the concrete outer wall of the basement and firmly clamped on the steel casing and wires and cables to prevent rainwater from intruding at the source and is not affected by thermal expansion and contraction due to seasonal changes. High-strength and high-tension annular air bags are used to automatically pressurize and fill the gaps between the wires and cables and the casing to further enhance the possibility of preventing rainwater from intruding.

[0061] Changing the installation process of wires and cables entering and exiting the basement, using a single high-voltage wire and cable and a bundle of weak-current cables, and using a combination of rigidity and flexibility to block the source, eliminating the occurrence of gaps and falling off at the blockage due to seasonal thermal expansion and contraction, and automatically pressurizing and filling the space between the wires and cables and the casing to ensure that there is no water seepage or leakage at the wire and cable entrances and exits for a long time, greatly reducing the cost of repeated blocking due to rainwater backflow during later use. It is convenient and quick during construction, and saves significant costs after use.

[0062] Example 2

[0063] like Figure 5-8 As shown, another embodiment of the present invention is shown. On the basis of Example 1, in step 2, the steel plate folded water stop ring 3 is installed in the middle of the galvanized steel casing 2, and the strip steel plate 14 is located on the circular steel plate 13 and is arranged toward the outdoor wire and cable operation well 11. The bottom of the pressure automatic pressurizing air pump 10 is provided with an output end, and is connected to a gas pipeline 16, which extends to the rubber casing 4;

[0064] The rubber sleeve 4 located on the inner side of the concrete outer wall 1 is provided with an annular portion 17 on the side opposite to the steel plate folding seal ring 3, and a connection notch 18 is preset on the annular portion 17, and the connection notch 18 is suitable for the gas pipeline 16 to pass through;

[0065] An air inlet 19 is installed on the top of the high-strength and high-tension annular inflatable bag 7, and the air inlet 19 is connected to the gas pipeline 16. Three stainless steel hose clamps 5 are installed on the outer side of the concrete outer wall 1, and the installation and tightening parts are staggered. A side branch pipe is installed outside the gas pipeline 16, and an exhaust valve 28 is installed at the side branch pipe.

[0066] An extrusion piece is installed between the waterproof insulating tape ring 8 and the high-strength and high-tension annular inflatable bag 7; the extrusion piece includes a ring plate 1 20 and a ring plate 21, a support piece and a travel switch 22 are installed between the ring plate 1 20 and the ring plate 21, the travel switch 22 is installed on the ring plate 1 20, and the output end includes a touch rod 23, and the touch rod 23 is arranged toward the ring plate 21;

[0067] The support member is suitable for adjusting the distance between the ring plate 1 20 and the ring plate 21. In a further technical solution, the support member includes a transverse spring 24, and one end of the transverse spring 24 is fixedly connected to the ring plate 1 20, and the other end is fixedly connected to the ring plate 21; a telescopic guide rod is installed in the middle of the transverse spring 24;

[0068] The telescopic guide rod includes a large diameter tube 25 and a small diameter tube 26. A connecting hole is provided in the large diameter tube 25, and is suitable for the small diameter tube 26 to pass through. A retaining ring 27 is installed in the connecting hole, and the retaining ring 27 is used to limit the small diameter tube 26.

[0069] The large diameter tube 25 is fixedly connected to the ring plate 1 20 , and the small diameter tube 26 is fixedly connected to the ring plate 21 .

[0070] The initial position is set, and a gap is reserved between the touch rod 23 and the ring plate 21; after the pressure automatic pressurizing air pump 10 is filled with the high-strength and high-tension annular air bag 7, the mortgage ring plate 21 moves toward the ring plate 1 20, and then abuts against and drives the trigger touch rod 23, and the touch rod 23 bends; the pressure automatic pressurizing air pump 10 is provided with an electromagnetic control valve 29, and the travel switch 22 is electrically connected to the electromagnetic control valve 29 to control the stop of pumping air; after completion, a sealing and flood prevention effect is formed.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A construction method for preventing flood backflow at the entrance and exit of basement wires and cables, characterized in that: The following steps are involved: Step 1: According to the design requirements of the drawings, count the weak wires (15) that are intended to enter and exit the basement, and put on appropriate rubber sleeves (4); Inject waterproof ointment into the rubber sleeve (4) to fill the gaps between the weak-current wires (15) to form a closed weak-current cable bundle (6); Step 2: According to the design requirements of the drawings, a galvanized steel casing (2) is processed, the length of which is the same as the thickness of the basement concrete outer wall (1) and the diameter of which is larger than the outer diameter of the weak current cable harness (6); Processing a set of 10mm thick circular steel plates (13), wherein the inner diameter of the 10mm thick circular steel plates (13) is equal to the outer diameter of the galvanized steel casing (2); The outer diameter of the 10mm thick circular steel plate (13) is 200mm larger than the outer diameter of the galvanized steel casing (2), and a set of 10mm thick 50mm wide strip steel plates (14) are processed, and the strip steel plates (14) are wrapped around the edge of the circular steel plate (13) and welded; Then, the annular steel plate (13) is placed in the middle of the galvanized steel casing (2) and welded to form a steel plate folding water stop ring (3); The steel plate folding water stop ring (3) requires that the weld seam is full and must not have water seepage, and should be painted with anti-rust paint; Step 3: Customize and purchase a rubber sleeve (4) of appropriate diameter, with a length of not less than 600 mm, and put one end of a set of rubber sleeves (4) on the galvanized steel sleeve (2), and place it on one side of the folded edge of the steel plate folded edge water stop ring (3), and install a stainless steel hose clamp (5); Step 4: Before pouring the concrete outer wall (1), install the processed galvanized steel casing (2) at the position designed in the drawing. After pouring the concrete outer wall (1), install the stainless steel annular pressure strip (9) along the galvanized steel casing (2) and the rubber casing (4) on the inner side of the concrete outer wall (1) and firmly attach it to the concrete outer wall (1); Step 5: After the weak current cable bundle (6) is installed, a waterproof insulating tape is wound around the weak current cable bundle (6) in the exposed end of the rubber sleeve (4), with the outer diameter of the winding thickness reaching the inner diameter of the rubber sleeve (4), and then the tape is tightened with a stainless steel hose clamp (5); Step 6: Install a water level float power switch control system (12) in the outdoor wire and cable operation well (11); An automatic pressure-increasing air pump (10) is installed inside the concrete outer wall (1) and is connected to a water level float power switch control system (12) in an outdoor electric wire and cable operation well (11); Step 7: placing a high-strength and high-tension annular inflatable bag (7) between the galvanized steel casing (2) and the weak-current cable bundle (6); When the flood in the electric wire and cable operation well (11) rises to the warning height, the pressure-increasing air pump (10) is automatically started to fill the galvanized steel pipe tightly.

2. A construction method for preventing flood backflow at the entrance and exit of basement wires and cables according to claim 1, characterized in that: In step 2, the steel plate folded water stop ring (3) is installed in the middle of the galvanized steel casing (2), and the strip steel plate (14) is located on the circular steel plate (13) and arranged toward the outdoor wire and cable operation well (11).

3. A construction method for preventing flood backflow at the entrance and exit of basement wires and cables according to claim 2, characterized in that: The bottom of the automatic pressure-increasing air pump (10) is provided with an output end, and is connected to a gas pipeline (16), and the gas pipeline (16) extends to the rubber sleeve (4); A rubber sleeve (4) located on the inner side of the concrete outer wall (1) is provided with an annular portion (17) on the side opposite to the steel plate folded water stop ring (3), and a connection notch (18) is preset on the annular portion (17), wherein the connection notch (18) is suitable for the gas transmission pipeline (16) to pass through; An air inlet (19) is installed on the top of the high-strength and high-tension annular inflatable bag (7), and the air inlet (19) is connected to the air delivery pipeline (16).

4. A construction method for preventing flood backflow at the entrance and exit of basement wires and cables according to claim 3, characterized in that: Two sets of stainless steel throat hoops (5) located outside the concrete outer wall (1) are each installed with three, and the installation and tightening positions are staggered.

5. A construction method for preventing flood backflow at the entrance and exit of basement wires and cables according to claim 4, characterized in that: A side branch pipe is installed outside the gas transmission pipeline (16), and an exhaust valve (28) is installed at the side branch pipe.

6. A construction method for preventing flood backflow at the entrance and exit of basement wires and cables according to claim 4, characterized in that: An extrusion piece is installed between the waterproof insulating tape ring (8) and the high-strength and high-tension annular inflatable bag (7); the extrusion piece includes a ring plate one (20) and a ring plate two (21); a support piece and a travel switch (22) are installed between the ring plate one (20) and the ring plate two (21); the travel switch (22) is installed on the ring plate one (20), and the output end includes a touch rod (23), and the touch rod (23) is arranged toward the ring plate two (21); The support member is suitable for adjusting the distance between the first ring plate (20) and the second ring plate (21).

7. A construction method for preventing flood backflow at the entrance and exit of basement wires and cables according to claim 6, characterized in that: The support member comprises a transverse spring (24), one end of which is fixedly connected to the first ring plate (20), and the other end of which is fixedly connected to the second ring plate (21); a telescopic guide rod is installed in the middle of the transverse spring (24); The telescopic guide rod comprises a large-diameter tube (25) and a small-diameter tube (26). A connecting hole is provided in the large-diameter tube (25) and is suitable for the small-diameter tube (26) to pass through. A retaining ring (27) is installed in the connecting hole and is used to restrict the small-diameter tube (26). The large diameter tube (25) is fixedly connected to the first ring plate (20), and the small diameter tube (26) is fixedly connected to the second ring plate (21).

8. A construction method for preventing flood backflow at the entrance and exit of basement electric wires and cables according to claim 6, characterized in that: The initial position is set, and a gap is reserved between the touch rod (23) and the second ring plate (21); after the pressure automatic pressurizing air pump (10) is filled with the high-strength and high-tension annular air bag (7), the second ring plate (21) is mortgaged to move toward the first ring plate (20), and then abuts against and drives the trigger touch rod (23), and the touch rod (23) is bent; an electromagnetic control valve (29) is provided on the pressure automatic pressurizing air pump (10), and the travel switch (22) is electrically connected to the electromagnetic control valve (29) to control the stopping of pumping air; after completion, a seal is formed.

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